'kernel_org-linux-2_6_6'.
+++ /dev/null
-Date: Thu, 29 Apr 2004 14:10:41 -0700 (PDT)
-From: Linus Torvalds <torvalds@osdl.org>
-To: Giuliano Colla
-cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
-Subject: Re: [hsflinux] [PATCH] Blacklist binary-only modules lying about
- their license
-Message-ID: <Pine.LNX.4.58.0404291404100.1629@ppc970.osdl.org>
-
-On Thu, 29 Apr 2004, Giuliano Colla wrote:
->
-> Let's try not to be ridiculous, please.
-
-It's not abotu being ridiculous. It's about honoring peoples copyrights.
-
-> As an end user, if I buy a full fledged modem, I get some amount of
-> proprietary, non GPL, code which executes within the board or the
-> PCMCIA card of the modem. The GPL driver may even support the
-> functionality of downloading a new version of *proprietary* code into
-> the flash Eprom of the device. The GPL linux driver interfaces with it,
-> and all is kosher.
-
-Indeed. Everything is kosher, because the other piece of hardware and
-software has _nothing_ to do with the kernel. It's not linked into it, it
-cannot reasonably corrupt internal kernel data structures with random
-pointer bugs, and in general you can think of firmware as part of the
-_hardware_, not the software of the machine.
-
-> On the other hand, I have the misfortune of being stuck with a
-> soft-modem, roughly the *same* proprietary code is provided as a binary
-> file, and a linux driver (source provided) interfaces with it. In that
-> case the kernel is flagged as "tainted".
-
-It is flagged as tainted, because your argument that it is "the same code"
-is totally BOGUS AND UNTRUE!
-
-In the binary kernel module case, a bug in the code corrupts random data
-structures, or accesses kernel internals without holding the proper locks,
-or does a million other things wrong, BECAUSE A KERNEL MODULE IS VERY
-INTIMATELY LINKED WITH THE KERNEL.
-
-A kernel module is _not_ a separate work, and can in _no_ way be seen as
-"part of the hardware". It's very much a part of the _kernel_. And the
-kernel developers require that such code be GPL'd so that it can be fixed,
-or if there's a valid argument that it's not a derived work and not GPL'd,
-then the kernel developers who have to support the end result mess most
-definitely do need to know about the taint.
-
-You are not the first (and sadly, you likely won't be the last) person to
-equate binary kernel modules with binary firmware. And I tell you that
-such a comparison is ABSOLUTE CRAPOLA. There's a damn big difference
-between running firmware on another chip behind a PCI bus, and linking
-into the kernel directly.
-
-And if you don't see that difference, then you are either terminally
-stupid, or you have some ulterior reason to claim that they are the same
-case even though they clearly are NOT.
-
-> Can you honestly tell apart the two cases, if you don't make a it a case
-> of "religion war"?
-
-It has absolutely nothing to do with religion.
-
- Linus
-
-Date: Fri, 5 Dec 2003 09:19:52 -0800 (PST)
-From: Linus Torvalds <torvalds@osdl.org>
-To: Peter Chubb
-cc: linux-kernel@vger.kernel.org
-Subject: Re: Linux GPL and binary module exception clause?
-Message-ID: <Pine.LNX.4.58.0312050853200.9125@home.osdl.org>
-
-On Fri, 5 Dec 2003, Peter Chubb wrote:
->
-> As I understand it, SCO is/was claiming that JFS and XFS are derived
-> works of the UNIX source base, because they were developed to match
-> the internal interfaces of UNIX, and with knowledge of the internals
-> of UNIX -- and they hold the copyrights of and are the licensor of UNIX.
-
-Yes, and I'm not claiming anything like that.
-
-I claim that a "binary linux kernel module" is a derived work of the
-kernel, and thus has to come with sources.
-
-But if you use those same sources (and _you_ wrote them) they do not
-contain any Linux code, they are _clearly_ not derived from Linux, and you
-can license and use your own code any way you want.
-
-You just can't make a binary module for Linux, and claim that that module
-isn't derived from the kernel. Because it generally is - the binary
-module not only included header files, but more importantly it clearly is
-_not_ a standalone work any more. So even if you made your own prototypes
-and tried hard to avoid kernel headers, it would _still_ be connected and
-dependent on the kernel.
-
-And note that I'm very much talking about just the _binary_. Your source
-code is still very much yours, and you have the right to distribute it
-separately any which way you want. You wrote it, you own the copyrights to
-it, and it is an independent work.
-
-But when you distribute it in a way that is CLEARLY tied to the GPL'd
-kernel (and a binary module is just one such clear tie - a "patch" to
-build it or otherwise tie it to the kernel is also such a tie, even if you
-distribute it as source under some other license), you're BY DEFINITION
-not an independent work any more.
-
-(But exactly because I'm not a black-and-white person, I reserve the right
-to make a balanced decision on any particular case. I have several times
-felt that the module author had a perfectly valid argument for why the
-"default assumption" of being derived wasn't the case. That's why things
-like the AFS module were accepted - but not liked - in the first place).
-
-This is why SCO's arguments are specious. IBM wrote their code, retained
-their copyrights to their code AND THEY SEVERED THE CONNECTION TO SCO'S
-CODE (and, arguably the connections didn't even exist in the first place,
-since apparently things like JFS were written for OS/2 as well, and the
-Linux port was based on that one - but that's a separate argument and
-independent of my point).
-
-See the definition of "derivative" in USC 17.1.101:
-
- A "derivative work" is a work based upon one or more preexisting
- works, such as a translation, musical arrangement, dramatization,
- fictionalization, motion picture version, sound recording, art
- reproduction, abridgment, condensation, or any other form in which
- a work may be recast, transformed, or adapted. A work consisting
- of editorial revisions, annotations, elaborations, or other
- modifications which, as a whole, represent an original work of
- authorship, is a "derivative work".
-
-And a binary module is an "elaboration" on the kernel. Sorry, but that is
-how it IS.
-
-In short: your code is yours. The code you write is automatically
-copyrighted by YOU, and as such you have the right to license and use it
-any way you want (well, modulo _other_ laws, of course - in the US your
-license can't be racist, for example, but that has nothing to do with
-copyright laws, and would fall under a totally different legal framework).
-
-But when you use that code to create an "elaboration" to the kernel, that
-makes it a derived work, and you cannot distribute it except as laid out
-by the GPL. A binary module is one such case, but even just a source patch
-is _also_ one such case. The lines you added are yours, but when you
-distribute it as an elaboration, you are bound by the restriction on
-derivative works.
-
-Or you had better have some other strong argument why it isn't. Which has
-been my point all along.
-
- Linus
-
-
-Date: Wed, 10 Dec 2003 09:10:18 -0800 (PST)
-From: Linus Torvalds <torvalds@osdl.org>
-To: Larry McVoy
-Subject: Re: Linux GPL and binary module exception clause?
-
-On Wed, 10 Dec 2003, Larry McVoy wrote:
->
-> Which is? How is it that you can spend a page of text saying a judge doesn't
-> care about technicalities and then base the rest of your argument on the
-> distinction between a "plugin" and a "kernel module"?
-
-I'll stop arguing, since you obviously do not get it.
-
-I explained the technicalities to _you_, and you are a technical person.
-
-But if you want to explain something to a judge, you get a real lawyer,
-and you make sure that the lawyer tries to explain the issue in _non_
-technical terms. Because, quite frankly, the judge is not going to buy a
-technical discussion he or she doesn't understand.
-
-Just as an example, how do you explain to a judge how much code the Linux
-kernel contains? Do you say "it's 6 million lines of C code and header
-files and documentation, for a total of about 175MB of data"?
-
-Yeah, maybe you'd _mention_ that, but to actually _illustrate_ the point
-you'd say that if you printed it out, it would be a solid stack of papers
-100 feet high. And you'd compare it to the height of the court building
-you're in, or something. Maybe you'd print out _one_ file, bind it as a
-book, and wave it around as one out of 15,000 files.
-
-But when _you_ ask me about how big the kernel is, I'd say "5 million
-lines". See the difference? It would be silly for me to tell you how many
-feet of paper the kernel would print out to, because we don't have those
-kinds of associations.
-
-Similarly, if you want to explain the notion of a kernel module, you'd
-compare it to maybe an extra chapter in a book. You'd make an analogy to
-something that never _ever_ mentions "linking".
-
-Just imagine: distributing a compiled binary-only kernel module that can
-be loaded into the kernel is not like distributing a new book: it's more
-like distributing a extra chapter to a book that somebody else wrote, that
-uses all the same characters and the plot, but more importantly it
-literally can only be read _together_ with the original work. It doesn't
-stand alone.
-
-In short, your honour, this extra chapter without any meaning on its own
-is a derived work of the book.
-
-In contrast, maybe you can re-write your code and distribute it as a
-short-story, which can be run on its own, and maybe the author has been
-influenced by another book, but the short-story could be bound AS IS, and
-a recipient would find it useful even without that other book. In that
-case, the short story is not a derived work - it's only inspired.
-
-Notice? This is actually _exactly_ what I've been arguing all along,
-except I've been arguing with a technical audience, so I've been using
-technical examples and terminology. But my argument is that just the fact
-that somebody compiled the code for Linux into a binary module that is
-useless without a particular version of the kernel DOES MAKE IT A DERIVED
-WORK.
-
-But also note how it's only the BINARY MODULE that is a derived work. Your
-source code is _not_ necessarily a derived work, and if you compile it for
-another operating system, I'd clearly not complain.
-
-This is the "stand-alone short story" vs "extra chapter without meaning
-outside the book" argument. See? One is a work in its own right, the other
-isn't.
-
- Linus
-
-
-Please read the FAQ at http://www.tux.org/lkml/
-Date: Thu, 4 Dec 2003 22:43:42 -0800 (PST)
-From: Linus Torvalds <torvalds@osdl.org>
-To: David Schwartz
-cc: linux-kernel@vger.kernel.org
-Subject: RE: Linux GPL and binary module exception clause?
-
-On Thu, 4 Dec 2003, David Schwartz wrote:
->
-> Yes, but they will cite the prohibition against *creating* derived
-> works.
-
-So?
-
-The same prohibition exists with the GPL. You are not allowed to create
-and distribute a derived work unless it is GPL'd.
-
-I don't see what you are arguing against. It is very clear: a kernel
-module is a derived work of the kernel by default. End of story.
-
-You can then try to prove (through development history etc) that there
-would be major reasons why it's not really derived. But your argument
-seems to be that _nothing_ is derived, which is clearly totally false, as
-you yourself admit when you replace "kernel" with "Harry Potter".
-
- Linus
-
-Date: Wed, 3 Dec 2003 16:00:21 -0800 (PST)
-From: Linus Torvalds <torvalds@osdl.org>
-To: Kendall Bennet
-cc: linux-kernel@vger.kernel.org
-Subject: Re: Linux GPL and binary module exception clause?
-
-On Wed, 3 Dec 2003, Kendall Bennett wrote:
->
-> I have heard many people reference the fact that the although the Linux
-> Kernel is under the GNU GPL license, that the code is licensed with an
-> exception clause that says binary loadable modules do not have to be
-> under the GPL.
-
-Nope. No such exception exists.
-
-There's a clarification that user-space programs that use the standard
-system call interfaces aren't considered derived works, but even that
-isn't an "exception" - it's just a statement of a border of what is
-clearly considered a "derived work". User programs are _clearly_ not
-derived works of the kernel, and as such whatever the kernel license is
-just doesn't matter.
-
-And in fact, when it comes to modules, the GPL issue is exactly the same.
-The kernel _is_ GPL. No ifs, buts and maybe's about it. As a result,
-anything that is a derived work has to be GPL'd. It's that simple.
-
-Now, the "derived work" issue in copyright law is the only thing that
-leads to any gray areas. There are areas that are not gray at all: user
-space is clearly not a derived work, while kernel patches clearly _are_
-derived works.
-
-But one gray area in particular is something like a driver that was
-originally written for another operating system (ie clearly not a derived
-work of Linux in origin). At exactly what point does it become a derived
-work of the kernel (and thus fall under the GPL)?
-
-THAT is a gray area, and _that_ is the area where I personally believe
-that some modules may be considered to not be derived works simply because
-they weren't designed for Linux and don't depend on any special Linux
-behaviour.
-
-Basically:
- - anything that was written with Linux in mind (whether it then _also_
- works on other operating systems or not) is clearly partially a derived
- work.
- - anything that has knowledge of and plays with fundamental internal
- Linux behaviour is clearly a derived work. If you need to muck around
- with core code, you're derived, no question about it.
-
-Historically, there's been things like the original Andrew filesystem
-module: a standard filesystem that really wasn't written for Linux in the
-first place, and just implements a UNIX filesystem. Is that derived just
-because it got ported to Linux that had a reasonably similar VFS interface
-to what other UNIXes did? Personally, I didn't feel that I could make that
-judgment call. Maybe it was, maybe it wasn't, but it clearly is a gray
-area.
-
-Personally, I think that case wasn't a derived work, and I was willing to
-tell the AFS guys so.
-
-Does that mean that any kernel module is automatically not a derived work?
-HELL NO! It has nothing to do with modules per se, except that non-modules
-clearly are derived works (if they are so central to the kenrel that you
-can't load them as a module, they are clearly derived works just by virtue
-of being very intimate - and because the GPL expressly mentions linking).
-
-So being a module is not a sign of not being a derived work. It's just
-one sign that _maybe_ it might have other arguments for why it isn't
-derived.
-
- Linus
-
-
-Date: Wed, 3 Dec 2003 16:23:33 -0800 (PST)
-From: Linus Torvalds <torvalds@osdl.org>
-To: Kendall Bennett
-cc: linux-kernel@vger.kernel.org
-Subject: Re: Linux GPL and binary module exception clause?
-
-
-On Wed, 3 Dec 2003, Linus Torvalds wrote:
->
-> So being a module is not a sign of not being a derived work. It's just
-> one sign that _maybe_ it might have other arguments for why it isn't
-> derived.
-
-Side note: historically, the Linux kernel module interfaces were really
-quite weak, and only exported a few tens of entry-points, and really
-mostly effectively only allowed character and block device drivers with
-standard interfaces, and loadable filesystems.
-
-So historically, the fact that you could load a module using nothing but
-these standard interfaces tended to be a much stronger argument for not
-being very tightly coupled with the kernel.
-
-That has changed, and the kernel module interfaces we have today are MUCH
-more extensive than they were back in '95 or so. These days modules are
-used for pretty much everything, including stuff that is very much
-"internal kernel" stuff and as a result the kind of historic "implied
-barrier" part of modules really has weakened, and as a result there is not
-avery strong argument for being an independent work from just the fact
-that you're a module.
-
-Similarly, historically there was a much stronger argument for things like
-AFS and some of the binary drivers (long forgotten now) for having been
-developed totally independently of Linux: they literally were developed
-before Linux even existed, by people who had zero knowledge of Linux. That
-tends to strengthen the argument that they clearly aren't derived.
-
-In contrast, these days it would be hard to argue that a new driver or
-filesystem was developed without any thought of Linux. I think the NVidia
-people can probably reasonably honestly say that the code they ported had
-_no_ Linux origin. But quite frankly, I'd be less inclined to believe that
-for some other projects out there..
-
- Linus
-
-
-
-
-Date: Thu, 17 Oct 2002 10:08:19 -0700 (PDT)
-From: Linus Torvalds <torvalds@transmeta.com>
-To: Christoph Hellwig
-Cc: <linux-kernel@vger.kernel.org>
-Subject: Re: [PATCH] make LSM register functions GPLonly exports
-In-Reply-To: <20021017175403.A32516@infradead.org>
-Message-ID: <Pine.LNX.4.44.0210170958340.6739-100000@home.transmeta.com>
-
-Note that if this fight ends up being a major issue, I'm just going to
-remove LSM and let the security vendors do their own thing. So far
-
- - I have not seen a lot of actual usage of the hooks
- - seen a number of people who still worry that the hooks degrade
- performance in critical areas
- - the worry that people use it for non-GPL'd modules is apparently real,
- considering Crispin's reply.
-
-I will re-iterate my stance on the GPL and kernel modules:
-
- There is NOTHING in the kernel license that allows modules to be
- non-GPL'd.
-
- The _only_ thing that allows for non-GPL modules is copyright law, and
- in particular the "derived work" issue. A vendor who distributes non-GPL
- modules is _not_ protected by the module interface per se, and should
- feel very confident that they can show in a court of law that the code
- is not derived.
-
- The module interface has NEVER been documented or meant to be a GPL
- barrier. The COPYING clearly states that the system call layer is such a
- barrier, so if you do your work in user land you're not in any way
- beholden to the GPL. The module interfaces are not system calls: there
- are system calls used to _install_ them, but the actual interfaces are
- not.
-
- The original binary-only modules were for things that were pre-existing
- works of code, ie drivers and filesystems ported from other operating
- systems, which thus could clearly be argued to not be derived works, and
- the original limited export table also acted somewhat as a barrier to
- show a level of distance.
-
-In short, Crispin: I'm going to apply the patch, and if you as a copyright
-holder of that file disagree, I will simply remove all of he LSM code from
-the kernel. I think it's very clear that a LSM module is a derived work,
-and thus copyright law and the GPL are not in any way unclear about it.
-
-If people think they can avoid the GPL by using function pointers, they
-are WRONG. And they have always been wrong.
-
- Linus
-
-------------------------------------------------------------------------
-Date: Fri, 19 Oct 2001 13:16:45 -0700 (PDT)
-From: Linus Torvalds <torvalds@transmeta.com>
-To: Barnes
-Subject: Re: GPL, Richard Stallman, and the Linux kernel
-
-[ This is not, of course, a legal document, but if you want to forward it
- to anybody else, feel free to do so. And if you want to argue legal
- points with me or point somehting out, I'm always interested. To a
- point ;-]
-
-On Fri, 19 Oct 2001, Barnes wrote:
->
-> I've been exchanging e-mail with Richard Stallman for a couple of
-> weeks about the finer points of the GPL.
-
-I feel your pain.
-
-> I've have spent time pouring through mailing list archives, usenet,
-> and web search engines to find out what's already been covered about
-> your statement of allowing dynamically loaded kernel modules with
-> proprietary code to co-exist with the Linux kernel. So far I've
-> been unable to find anything beyond vague statements attributed to
-> you. If these issues are addressed somewhere already, please refer
-> me.
-
-Well, it really boils down to the equivalent of "_all_ derived modules
-have to be GPL'd". An external module doesn't really change the GPL in
-that respect.
-
-There are (mainly historical) examples of UNIX device drivers and some
-UNIX filesystems that were pre-existing pieces of work, and which had
-fairly well-defined and clear interfaces and that I personally could not
-really consider any kind of "derived work" at all, and that were thus
-acceptable. The clearest example of this is probably the AFS (the Andrew
-Filesystem), but there have been various device drivers ported from SCO
-too.
-
-> Issue #1
-> ========
-> Currently the GPL version 2 license is the only license covering the
-> Linux kernel. I cannot find any alternative license explaining the
-> loadable kernel module exception which makes your position difficult
-> to legally analyze.
->
-> There is a note at the top of www.kernel.org/pub/linux/kernel/COPYING,
-> but that states "user programs" which would clearly not apply to
-> kernel modules.
->
-> Could you clarify in writing what the exception precisely states?
-
-Well, there really is no exception. However, copyright law obviously
-hinges on the definition of "derived work", and as such anything can
-always be argued on that point.
-
-I personally consider anything a "derived work" that needs special hooks
-in the kernel to function with Linux (ie it is _not_ acceptable to make a
-small piece of GPL-code as a hook for the larger piece), as that obviously
-implies that the bigger module needs "help" from the main kernel.
-
-Similarly, I consider anything that has intimate knowledge about kernel
-internals to be a derived work.
-
-What is left in the gray area tends to be clearly separate modules: code
-that had a life outside Linux from the beginning, and that do something
-self-containted that doesn't really have any impact on the rest of the
-kernel. A device driver that was originally written for something else,
-and that doesn't need any but the standard UNIX read/write kind of
-interfaces, for example.
-
-> Issue #2
-> ========
-> I've found statements attributed to you that you think only 10% of
-> the code in the current kernel was written by you. By not being the
-> sole copyright holder of the Linux kernel, a stated exception to
-> the GPL seems invalid unless all kernel copyright holders agreed on
-> this exception. How does the exception cover GPL'd kernel code not
-> written by you? Has everyone contributing to the kernel forfeited
-> their copyright to you or agreed with the exception?
-
-Well, see above about the lack of exception, and about the fundamental
-gray area in _any_ copyright issue. The "derived work" issue is obviously
-a gray area, and I know lawyers don't like them. Crazy people (even
-judges) have, as we know, claimed that even obvious spoofs of a work that
-contain nothing of the original work itself, can be ruled to be "derived".
-
-I don't hold views that extreme, but at the same time I do consider a
-module written for Linux and using kernel infrastructures to get its work
-done, even if not actually copying any existing Linux code, to be a
-derived work by default. You'd have to have a strong case to _not_
-consider your code a derived work..
-
-> Issue #3
-> ========
-> This issue is related to issue #1. Exactly what is covered by the
-> exception? For example, all code shipped with the Linux kernel
-> archive and typically installed under /usr/src/linux, all code under
-> /usr/src/linux except /usr/src/linux/drivers, or just the code in
-> the /usr/src/linux/kernel directory?
-
-See above, and I think you'll see my point.
-
-The "user program" exception is not an exception at all, for example, it's
-just a more clearly stated limitation on the "derived work" issue. If you
-use standard UNIX system calls (with accepted Linux extensions), your
-program obviously doesn't "derive" from the kernel itself.
-
-Whenever you link into the kernel, either directly or through a module,
-the case is just a _lot_ more muddy. But as stated, by default it's
-obviously derived - the very fact that you _need_ to do something as
-fundamental as linking against the kernel very much argues that your
-module is not a stand-alone thing, regardless of where the module source
-code itself has come from.
-
-> Issue #4
-> ========
-> This last issue is not so much a issue for the Linux kernel
-> exception, but a request for comment.
->
-> Richard and I both agree that a "plug-in" and a "dynamically
-> loaded kernel module" are effectively the same under the GPL.
-
-Agreed.
-
-The Linux kernel modules had (a long time ago), a more limited interface,
-and not very many functions were actually exported. So five or six years
-ago, we could believably claim that "if you only use these N interfaces
-that are exported from the standard kernel, you've kind of implicitly
-proven that you do not need the kernel infrastructure".
-
-That was never really documented either (more of a guideline for me and
-others when we looked at the "derived work" issue), and as modules were
-more-and-more used not for external stuff, but just for dynamic loading of
-standard linux modules that were distributed as part of the kernel anyway,
-the "limited interfaces" argument is no longer a very good guideline for
-"derived work".
-
-So these days, we export many internal interfaces, not because we don't
-think that they would "taint" the linker, but simply because it's useful
-to do dynamic run-time loading of modules even with standard kernel
-modules that _are_ supposed to know a lot about kernel internals, and are
-obviously "derived works"..
-
-> However we disagree that a plug-in for a GPL'd program falls
-> under the GPL as asserted in the GPL FAQ found in the answer:
-> http://www.gnu.org/licenses/gpl-faq.html#GPLAndPlugins.
-
-I think you really just disagree on what is derived, and what is not.
-Richard is very extreme: _anything_ that links is derived, regardless of
-what the arguments against it are. I'm less extreme, and I bet you're even
-less so (at least you would like to argue so for your company).
-
-> My assertion is that plug-ins are written to an interface, not a
-> program. Since interfaces are not GPL'd, a plug-in cannot be GPL'd
-> until the plug-in and program are placed together and run. That is
-> done by the end user, not the plug-in creator.
-
-I agree, but also disrespectfully disagree ;)
-
-It's an issue of what a "plug-in" is - is it a way for the program to
-internally load more modules as it needs them, or is it _meant_ to be a
-public, published interface.
-
-For example, the "system call" interface could be considered a "plug-in
-interface", and running a user mode program under Linux could easily be
-construed as running a "plug-in" for the Linux kernel. No?
-
-And there, I obviously absolutely agree with you 100%: the interface is
-published, and it's _meant_ for external and independent users. It's an
-interface that we go to great lengths to preserve as well as we can, and
-it's an interface that is designed to be independent of kernel versions.
-
-But maybe somebody wrote his program with the intention to dynamically
-load "actors" as they were needed, as a way to maintain a good modularity,
-and to try to keep the problem spaces well-defined. In that case, the
-"plug-in" may technically follow all the same rules as the system call
-interface, even though the author doesn't intend it that way.
-
-So I think it's to a large degree a matter of intent, but it could
-arguably also be considered a matter of stability and documentation (ie
-"require recompilation of the plug-in between version changes" would tend
-to imply that it's an internal interface, while "documented binary
-compatibility across many releases" implies a more stable external
-interface, and less of a derived work)
-
-Does that make sense to you?
-
-> I asked Richard to comment on several scenarios involving plug-ins
-> explain whether or not they were in violation of the GPL. So far he
-> as only addressed one and has effectively admitted a hole. This is
-> the one I asked that he's responded to:
-> [A] non-GPL'd plug-in writer writes a plug-in for a non-GPL'd
-> program. Another author writes a GPL'd program making the
-> first author's plug-ins compatible with his program. Are now
-> the plug-in author's plug-ins now retroactively required to be
-> GPL'd?
->
-> His response:
-> No, because the plug-in was not written to extend this program.
->
-> I find it suspicious that whether or not the GPL would apply to the
-> plug-in depends on the mindset of the author.
-
-The above makes no sense if you think of it as a "plug in" issue, but it
-makes sense if you think of it as a "derived work" issue, along with
-taking "intent" into account.
-
-I know lawyers tend to not like the notion of "intent", because it brings
-in another whole range of gray areas, but it's obviously a legal reality.
-
-Ok, enough blathering from me. I'd just like to finish off with a few
-comments, just to clarify my personal stand:
-
- - I'm obviously not the only copyright holder of Linux, and I did so on
- purpose for several reasons. One reason is just because I hate the
- paperwork and other cr*p that goes along with copyright assignments.
-
- Another is that I don't much like copyright assignments at all: the
- author is the author, and he may be bound by my requirement for GPL,
- but that doesn't mean that he should give his copyright to me.
-
- A third reason, and the most relevant reason here, is that I want
- people to _know_ that I cannot control the sources. I can write you a
- note to say that "for use XXX, I do not consider module YYY to be a
- derived work of my kernel", but that would not really matter that much.
- Any other Linux copyright holder might still sue you.
-
- This third reason is what makes people who otherwise might not trust me
- realize that I cannot screw people over. I am bound by the same
- agreement that I require of everybody else, and the only special status
- I really have is a totally non-legal issue: people trust me.
-
- (Yes, I realize that I probably would end up having more legal status
- than most, even apart from the fact that I still am the largest single
- copyright holder, if only because of appearances)
-
- - I don't really care about copyright law itself. What I care about is my
- own morals. Whether I'd ever sue somebody or not (and quite frankly,
- it's the last thing I ever want to do - if I never end up talking to
- lawyers in a professional context, I'll be perfectly happy. No
- disrespect intended) will be entirely up to whether I consider what
- people do to me "moral" or not. Which is why intent matters to me a
- lot - both the intent of the person/corporation doign the infringement,
- _and_ the intent of me and others in issues like the module export
- interface.
-
- Another way of putting this: I don't care about "legal loopholes" and
- word-wrangling.
-
- - Finally: I don't trust the FSF. I like the GPL a lot - although not
- necessarily as a legal piece of paper, but more as an intent. Which
- explains why, if you've looked at the Linux COPYING file, you may have
- noticed the explicit comment about "only _this_ particular version of
- the GPL covers the kernel by default".
-
- That's because I agree with the GPL as-is, but I do not agree with the
- FSF on many other matters. I don't like software patents much, for
- example, but I do not want the code I write to be used as a weapon
- against companies that have them. The FSF has long been discussing and
- is drafting the "next generation" GPL, and they generally suggest that
- people using the GPL should say "v2 or at your choice any later
- version".
-
- Linux doesn't do that. The Linux kernel is v2 ONLY, apart from a few
- files where the author put in the FSF extension (and see above about
- copyright assignments why I would never remove such an extension).
-
-The "v2 only" issue might change some day, but only after all documented
-copyright holders agree on it, and only after we've seen what the FSF
-suggests. From what I've seen so far from the FSF drafts, we're not likely
-to change our v2-only stance, but there might of course be legal reasons
-why we'd have to do something like it (ie somebody challenging the GPLv2
-in court, and part of it to be found unenforceable or similar would
-obviously mean that we'd have to reconsider the license).
-
- Linus
-
-PS. Historically, binary-only modules have not worked well under Linux,
-quite regardless of any copyright issues. The kernel just develops too
-quickly for binary modules to work well, and nobody really supports them.
-Companies like Red Hat etc tend to refuse to have anything to do with
-binary modules, because if something goes wrong there is nothing they can
-do about it. So I just wanted to let you know that the _legal_ issue is
-just the beginning. Even though you probably don't personally care ;)
-
-
+++ /dev/null
-Driver for PXA25x LCD controller
-================================
-
-The driver supports the following options, either via
-options=<OPTIONS> when modular or video=pxafb:<OPTIONS> when built in.
-
-For example:
- modprobe pxafb options=mode:640x480-8,passive
-or on the kernel command line
- video=pxafb:mode:640x480-8,passive
-
-mode:XRESxYRES[-BPP]
- XRES == LCCR1_PPL + 1
- YRES == LLCR2_LPP + 1
- The resolution of the display in pixels
- BPP == The bit depth. Valid values are 1, 2, 4, 8 and 16.
-
-pixclock:PIXCLOCK
- Pixel clock in picoseconds
-
-left:LEFT == LCCR1_BLW + 1
-right:RIGHT == LCCR1_ELW + 1
-hsynclen:HSYNC == LCCR1_HSW + 1
-upper:UPPER == LCCR2_BFW
-lower:LOWER == LCCR2_EFR
-vsynclen:VSYNC == LCCR2_VSW + 1
- Display margins and sync times
-
-color | mono => LCCR0_CMS
- umm...
-
-active | passive => LCCR0_PAS
- Active (TFT) or Passive (STN) display
-
-single | dual => LCCR0_SDS
- Single or dual panel passive display
-
-4pix | 8pix => LCCR0_DPD
- 4 or 8 pixel monochrome single panel data
-
-hsync:HSYNC
-vsync:VSYNC
- Horizontal and vertical sync. 0 => active low, 1 => active
- high.
-
-dpc:DPC
- Double pixel clock. 1=>true, 0=>false
-
-outputen:POLARITY
- Output Enable Polarity. 0 => active low, 1 => active high
-
-pixclockpol:POLARITY
- pixel clock polarity
- 0 => falling edge, 1 => rising edge
+++ /dev/null
-
-relayfs - a high-speed data relay filesystem
-============================================
-
-relayfs is a filesystem designed to provide an efficient mechanism for
-tools and facilities to relay large amounts of data from kernel space
-to user space.
-
-The main idea behind relayfs is that every data flow is put into a
-separate "channel" and each channel is a file. In practice, each
-channel is a separate memory buffer allocated from within kernel space
-upon channel instantiation. Software needing to relay data to user
-space would open a channel or a number of channels, depending on its
-needs, and would log data to that channel. All the buffering and
-locking mechanics are taken care of by relayfs. The actual format and
-protocol used for each channel is up to relayfs' clients.
-
-relayfs makes no provisions for copying the same data to more than a
-single channel. This is for the clients of the relay to take care of,
-and so is any form of data filtering. The purpose is to keep relayfs
-as simple as possible.
-
-
-Usage
-=====
-
-In addition to the relayfs kernel API described below, relayfs
-implements basic file operations. Here are the file operations that
-are available and some comments regarding their behavior:
-
-open() enables user to open an _existing_ channel. A channel can be
- opened in blocking or non-blocking mode, and can be opened
- for reading as well as for writing. Readers will by default
- be auto-consuming.
-
-mmap() results in channel's memory buffer being mmapped into the
- caller's memory space.
-
-read() since we are dealing with circular buffers, the user is only
- allowed to read forward. Some apps may want to loop around
- read() waiting for incoming data - if there is no data
- available, read will put the reader on a wait queue until
- data is available (blocking mode). Non-blocking reads return
- -EAGAIN if data is not available.
-
-
-write() writing from user space operates exactly as relay_write() does
- (described below).
-
-poll() POLLIN/POLLRDNORM/POLLOUT/POLLWRNORM/POLLERR supported.
-
-close() decrements the channel's refcount. When the refcount reaches
- 0 i.e. when no process or kernel client has the file open
- (see relay_close() below), the channel buffer is freed.
-
-
-In order for a user application to make use of relayfs files, the
-relayfs filesystem must be mounted. For example,
-
- mount -t relayfs relayfs /mountpoint
-
-
-The relayfs kernel API
-======================
-
-relayfs channels are implemented as circular buffers subdivided into
-'sub-buffers'. kernel clients write data into the channel using
-relay_write(), and are notified via a set of callbacks when
-significant events occur within the channel. 'Significant events'
-include:
-
-- a sub-buffer has been filled i.e. the current write won't fit into the
- current sub-buffer, and a 'buffer-switch' is triggered, after which
- the data is written into the next buffer (if the next buffer is
- empty). The client is notified of this condition via two callbacks,
- one providing an opportunity to perform start-of-buffer tasks, the
- other end-of-buffer tasks.
-
-- data is ready for the client to process. The client can choose to
- be notified either on a per-sub-buffer basis (bulk delivery) or
- per-write basis (packet delivery).
-
-- data has been written to the channel from user space. The client can
- use this notification to accept and process 'commands' sent to the
- channel via write(2).
-
-- the channel has been opened/closed/mapped/unmapped from user space.
- The client can use this notification to trigger actions within the
- kernel application, such as enabling/disabling logging to the
- channel. It can also return result codes from the callback,
- indicating that the operation should fail e.g. in order to restrict
- more than one user space open or mmap.
-
-- the channel needs resizing, or needs to update its
- state based on the results of the resize. Resizing the channel is
- up to the kernel client to actually perform. If the channel is
- configured for resizing, the client is notified when the unread data
- in the channel passes a preset threshold, giving it the opportunity
- to allocate a new channel buffer and replace the old one.
-
-Reader objects
---------------
-
-Channel readers use an opaque rchan_reader object to read from
-channels. For VFS readers (those using read(2) to read from a
-channel), these objects are automatically created and used internally;
-only kernel clients that need to directly read from channels, or whose
-userspace applications use mmap to access channel data, need to know
-anything about rchan_readers - others may skip this section.
-
-A relay channel can have any number of readers, each represented by an
-rchan_reader instance, which is used to encapsulate reader settings
-and state. rchan_reader objects should be treated as opaque by kernel
-clients. To create a reader object for directly accessing a channel
-from kernel space, call the add_rchan_reader() kernel API function:
-
-rchan_reader *add_rchan_reader(rchan_id, auto_consume)
-
-This function returns an rchan_reader instance if successful, which
-should then be passed to relay_read() when the kernel client is
-interested in reading from the channel.
-
-The auto_consume parameter indicates whether a read done by this
-reader will automatically 'consume' that portion of the unread channel
-buffer when relay_read() is called (see below for more details).
-
-To close the reader, call
-
-remove_rchan_reader(reader)
-
-which will remove the reader from the list of current readers.
-
-
-To create a reader object representing a userspace mmap reader in the
-kernel application, call the add_map_reader() kernel API function:
-
-rchan_reader *add_map_reader(rchan_id)
-
-This function returns an rchan_reader instance if successful, whose
-main purpose is as an argument to be passed into
-relay_buffers_consumed() when the kernel client becomes aware that
-data has been read by a user application using mmap to read from the
-channel buffer. There is no auto_consume option in this case, since
-only the kernel client/user application knows when data has been read.
-
-To close the map reader, call
-
-remove_map_reader(reader)
-
-which will remove the reader from the list of current readers.
-
-Consumed count
---------------
-
-A relayfs channel is a circular buffer, which means that if there is
-no reader reading from it or a reader reading too slowly, at some
-point the channel writer will 'lap' the reader and data will be lost.
-In normal use, readers will always be able to keep up with writers and
-the buffer is thus never in danger of becoming full. In many
-applications, it's sufficient to ensure that this is practically
-speaking always the case, by making the buffers large enough. These
-types of applications can basically open the channel as
-RELAY_MODE_CONTINOUS (the default anyway) and not worry about the
-meaning of 'consume' and skip the rest of this section.
-
-If it's important for the application that a kernel client never allow
-writers to overwrite unread data, the channel should be opened using
-RELAY_MODE_NO_OVERWRITE and must be kept apprised of the count of
-bytes actually read by the (typically) user-space channel readers.
-This count is referred to as the 'consumed count'. read(2) channel
-readers automatically update the channel's 'consumed count' as they
-read. If the usage mode is to have only read(2) readers, which is
-typically the case, the kernel client doesn't need to worry about any
-of the relayfs functions having to do with 'bytes consumed' and can
-skip the rest of this section. (Note that it is possible to have
-multiple read(2) or auto-consuming readers, but like having multiple
-readers on a pipe, these readers will race with each other i.e. it's
-supported, but doesn't make much sense).
-
-If the kernel client cannot rely on an auto-consuming reader to keep
-the 'consumed count' up-to-date, then it must do so manually, by
-making the appropriate calls to relay_buffers_consumed() or
-relay_bytes_consumed(). In most cases, this should only be necessary
-for bulk mmap clients - almost all packet clients should be covered by
-having auto-consuming read(2) readers. For mmapped bulk clients, for
-instance, there are no auto-consuming VFS readers, so the kernel
-client needs to make the call to relay_buffers_consumed() after
-sub-buffers are read.
-
-Kernel API
-----------
-
-Here's a summary of the API relayfs provides to in-kernel clients:
-
-int relay_open(channel_path, bufsize, nbufs, channel_flags,
- channel_callbacks, start_reserve, end_reserve,
- rchan_start_reserve, resize_min, resize_max, mode,
- init_buf, init_buf_size)
-int relay_write(channel_id, *data_ptr, count, time_delta_offset, **wrote)
-rchan_reader *add_rchan_reader(channel_id, auto_consume)
-int remove_rchan_reader(rchan_reader *reader)
-rchan_reader *add_map_reader(channel_id)
-int remove_map_reader(rchan_reader *reader)
-int relay_read(reader, buf, count, wait, *actual_read_offset)
-void relay_buffers_consumed(reader, buffers_consumed)
-void relay_bytes_consumed(reader, bytes_consumed, read_offset)
-int relay_bytes_avail(reader)
-int rchan_full(reader)
-int rchan_empty(reader)
-int relay_info(channel_id, *channel_info)
-int relay_close(channel_id)
-int relay_realloc_buffer(channel_id, nbufs, async)
-int relay_replace_buffer(channel_id)
-int relay_reset(int rchan_id)
-
-----------
-int relay_open(channel_path, bufsize, nbufs,
- channel_flags, channel_callbacks, start_reserve,
- end_reserve, rchan_start_reserve, resize_min, resize_max, mode)
-
-relay_open() is used to create a new entry in relayfs. This new entry
-is created according to channel_path. channel_path contains the
-absolute path to the channel file on relayfs. If, for example, the
-caller sets channel_path to "/xlog/9", a "xlog/9" entry will appear
-within relayfs automatically and the "xlog" directory will be created
-in the filesystem's root. relayfs does not implement any policy on
-its content, except to disallow the opening of two channels using the
-same file. There are, nevertheless a set of guidelines for using
-relayfs. Basically, each facility using relayfs should use a top-level
-directory identifying it. The entry created above, for example,
-presumably belongs to the "xlog" software.
-
-The remaining parameters for relay_open() are as follows:
-
-- channel_flags - an ORed combination of attribute values controlling
- common channel characteristics:
-
- - logging scheme - relayfs use 2 mutually exclusive schemes
- for logging data to a channel. The 'lockless scheme'
- reserves and writes data to a channel without the need of
- any type of locking on the channel. This is the preferred
- scheme, but may not be available on a given architecture (it
- relies on the presence of a cmpxchg instruction). It's
- specified by the RELAY_SCHEME_LOCKLESS flag. The 'locking
- scheme' either obtains a lock on the channel for writing or
- disables interrupts, depending on whether the channel was
- opened for SMP or global usage (see below). It's specified
- by the RELAY_SCHEME_LOCKING flag. While a client may want
- to explicitly specify a particular scheme to use, it's more
- convenient to specify RELAY_SCHEME_ANY for this flag, which
- will allow relayfs to choose the best available scheme i.e.
- lockless if supported.
-
- - overwrite mode (default is RELAY_MODE_CONTINUOUS) -
- If RELAY_MODE_CONTINUOUS is specified, writes to the channel
- will succeed regardless of whether there are up-to-date
- consumers or not. If RELAY_MODE_NO_OVERWRITE is specified,
- the channel becomes 'full' when the total amount of buffer
- space unconsumed by readers equals or exceeds the total
- buffer size. With the buffer in this state, writes to the
- buffer will fail - clients need to check the return code from
- relay_write() to determine if this is the case and act
- accordingly - 0 or a negative value indicate the write failed.
-
- - SMP usage - this applies only when the locking scheme is in
- use. If RELAY_USAGE_SMP is specified, it's assumed that the
- channel will be used in a per-CPU fashion and consequently,
- the only locking that will be done for writes is to disable
- local irqs. If RELAY_USAGE_GLOBAL is specified, it's assumed
- that writes to the buffer can occur within any CPU context,
- and spinlock_irq_save will be used to lock the buffer.
-
- - delivery mode - if RELAY_DELIVERY_BULK is specified, the
- client will be notified via its deliver() callback whenever a
- sub-buffer has been filled. Alternatively,
- RELAY_DELIVERY_PACKET will cause delivery to occur after the
- completion of each write. See the description of the channel
- callbacks below for more details.
-
- - timestamping - if RELAY_TIMESTAMP_TSC is specified and the
- architecture supports it, efficient TSC 'timestamps' can be
- associated with each write, otherwise more expensive
- gettimeofday() timestamping is used. At the beginning of
- each sub-buffer, a gettimeofday() timestamp and the current
- TSC, if supported, are read, and are passed on to the client
- via the buffer_start() callback. This allows correlation of
- the current time with the current TSC for subsequent writes.
- Each subsequent write is associated with a 'time delta',
- which is either the current TSC, if the channel is using
- TSCs, or the difference between the buffer_start gettimeofday
- timestamp and the gettimeofday time read for the current
- write. Note that relayfs never writes either a timestamp or
- time delta into the buffer unless explicitly asked to (see
- the description of relay_write() for details).
-
-- bufsize - the size of the 'sub-buffers' making up the circular channel
- buffer. For the lockless scheme, this must be a power of 2.
-
-- nbufs - the number of 'sub-buffers' making up the circular
- channel buffer. This must be a power of 2.
-
- The total size of the channel buffer is bufsize * nbufs rounded up
- to the next kernel page size. If the lockless scheme is used, both
- bufsize and nbufs must be a power of 2. If the locking scheme is
- used, the bufsize can be anything and nbufs must be a power of 2. If
- RELAY_SCHEME_ANY is used, the bufsize and nbufs should be a power of 2.
-
- NOTE: if nbufs is 1, relayfs will bypass the normal size
- checks and will allocate an rvmalloced buffer of size bufsize.
- This buffer will be freed when relay_close() is called, if the channel
- isn't still being referenced.
-
-- callbacks - a table of callback functions called when events occur
- within the data relay that clients need to know about:
-
- - int buffer_start(channel_id, current_write_pos, buffer_id,
- start_time, start_tsc, using_tsc) -
-
- called at the beginning of a new sub-buffer, the
- buffer_start() callback gives the client an opportunity to
- write data into space reserved at the beginning of a
- sub-buffer. The client should only write into the buffer
- if it specified a value for start_reserve and/or
- channel_start_reserve (see below) when the channel was
- opened. In the latter case, the client can determine
- whether to write its one-time rchan_start_reserve data by
- examining the value of buffer_id, which will be 0 for the
- first sub-buffer. The address that the client can write
- to is contained in current_write_pos (the client by
- definition knows how much it can write i.e. the value it
- passed to relay_open() for start_reserve/
- channel_start_reserve). start_time contains the
- gettimeofday() value for the start of the buffer and start
- TSC contains the TSC read at the same time. The using_tsc
- param indicates whether or not start_tsc is valid (it
- wouldn't be if TSC timestamping isn't being used).
-
- The client should return the number of bytes it wrote to
- the channel, 0 if none.
-
- - int buffer_end(channel_id, current_write_pos, end_of_buffer,
- end_time, end_tsc, using_tsc)
-
- called at the end of a sub-buffer, the buffer_end()
- callback gives the client an opportunity to perform
- end-of-buffer processing. Note that the current_write_pos
- is the position where the next write would occur, but
- since the current write wouldn't fit (which is the trigger
- for the buffer_end event), the buffer is considered full
- even though there may be unused space at the end. The
- end_of_buffer param pointer value can be used to determine
- exactly the size of the unused space. The client should
- only write into the buffer if it specified a value for
- end_reserve when the channel was opened. If the client
- doesn't write anything i.e. returns 0, the unused space at
- the end of the sub-buffer is available via relay_info() -
- this data may be needed by the client later if it needs to
- process raw sub-buffers (an alternative would be to save
- the unused bytes count value in end_reserve space at the
- end of each sub-buffer during buffer_end processing and
- read it when needed at a later time. The other
- alternative would be to use read(2), which makes the
- unused count invisible to the caller). end_time contains
- the gettimeofday() value for the end of the buffer and end
- TSC contains the TSC read at the same time. The using_tsc
- param indicates whether or not end_tsc is valid (it
- wouldn't be if TSC timestamping isn't being used).
-
- The client should return the number of bytes it wrote to
- the channel, 0 if none.
-
- - void deliver(channel_id, from, len)
-
- called when data is ready for the client. This callback
- is used to notify a client when a sub-buffer is complete
- (in the case of bulk delivery) or a single write is
- complete (packet delivery). A bulk delivery client might
- wish to then signal a daemon that a sub-buffer is ready.
- A packet delivery client might wish to process the packet
- or send it elsewhere. The from param is a pointer to the
- delivered data and len specifies how many bytes are ready.
-
- - void user_deliver(channel_id, from, len)
-
- called when data has been written to the channel from user
- space. This callback is used to notify a client when a
- successful write from userspace has occurred, independent
- of whether bulk or packet delivery is in use. This can be
- used to allow userspace programs to communicate with the
- kernel client through the channel via out-of-band write(2)
- 'commands' instead of via ioctls, for instance. The from
- param is a pointer to the delivered data and len specifies
- how many bytes are ready. Note that this callback occurs
- after the bytes have been successfully written into the
- channel, which means that channel readers must be able to
- deal with the 'command' data which will appear in the
- channel data stream just as any other userspace or
- non-userspace write would.
-
- - int needs_resize(channel_id, resize_type,
- suggested_buf_size, suggested_n_bufs)
-
- called when a channel's buffers are in danger of becoming
- full i.e. the number of unread bytes in the channel passes
- a preset threshold, or when the current capacity of a
- channel's buffer is no longer needed. Also called to
- notify the client when a channel's buffer has been
- replaced. If resize_type is RELAY_RESIZE_EXPAND or
- RELAY_RESIZE_SHRINK, the kernel client should arrange to
- call relay_realloc_buffer() with the suggested buffer size
- and buffer count, which will allocate (but will not
- replace the old one) a new buffer of the recommended size
- for the channel. When the allocation has completed,
- needs_resize() is again called, this time with a
- resize_type of RELAY_RESIZE_REPLACE. The kernel client
- should then arrange to call relay_replace_buffer() to
- actually replace the old channel buffer with the newly
- allocated buffer. Finally, once the buffer replacement
- has completed, needs_resize() is again called, this time
- with a resize_type of RELAY_RESIZE_REPLACED, to inform the
- client that the replacement is complete and additionally
- confirming the current sub-buffer size and number of
- sub-buffers. Note that a resize can be canceled if
- relay_realloc_buffer() is called with the async param
- non-zero and the resize conditions no longer hold. In
- this case, the RELAY_RESIZE_REPLACED suggested number of
- sub-buffers will be the same as the number of sub-buffers
- that existed before the RELAY_RESIZE_SHRINK or EXPAND i.e.
- values indicating that the resize didn't actually occur.
-
- - int fileop_notify(channel_id, struct file *filp, enum relay_fileop)
-
- called when a userspace file operation has occurred or
- will occur on a relayfs channel file. These notifications
- can be used by the kernel client to trigger actions within
- the kernel client when the corresponding event occurs,
- such as enabling logging only when a userspace application
- opens or mmaps a relayfs file and disabling it again when
- the file is closed or unmapped. The kernel client can
- also return its own return value, which can affect the
- outcome of file operation - returning 0 indicates that the
- operation should succeed, and returning a negative value
- indicates that the operation should be failed, and that
- the returned value should be returned to the ultimate
- caller e.g. returning -EPERM from the open fileop will
- cause the open to fail with -EPERM. Among other things,
- the return value can be used to restrict a relayfs file
- from being opened or mmap'ed more than once. The currently
- implemented fileops are:
-
- RELAY_FILE_OPEN - a relayfs file is being opened. Return
- 0 to allow it to succeed, negative to
- have it fail. A negative return value will
- be passed on unmodified to the open fileop.
- RELAY_FILE_CLOSE- a relayfs file is being closed. The return
- value is ignored.
- RELAY_FILE_MAP - a relayfs file is being mmap'ed. Return 0
- to allow it to succeed, negative to have
- it fail. A negative return value will be
- passed on unmodified to the mmap fileop.
- RELAY_FILE_UNMAP- a relayfs file is being unmapped. The return
- value is ignored.
-
- - void ioctl(rchan_id, cmd, arg)
-
- called when an ioctl call is made using a relayfs file
- descriptor. The cmd and arg are passed along to this
- callback unmodified for it to do as it wishes with. The
- return value from this callback is used as the return value
- of the ioctl call.
-
- If the callbacks param passed to relay_open() is NULL, a set of
- default do-nothing callbacks will be defined for the channel.
- Likewise, any NULL rchan_callback function contained in a non-NULL
- callbacks struct will be filled in with a default callback function
- that does nothing.
-
-- start_reserve - the number of bytes to be reserved at the start of
- each sub-buffer. The client can do what it wants with this number
- of bytes when the buffer_start() callback is invoked. Typically
- clients would use this to write per-sub-buffer header data.
-
-- end_reserve - the number of bytes to be reserved at the end of each
- sub-buffer. The client can do what it wants with this number of
- bytes when the buffer_end() callback is invoked. Typically clients
- would use this to write per-sub-buffer footer data.
-
-- channel_start_reserve - the number of bytes to be reserved, in
- addition to start_reserve, at the beginning of the first sub-buffer
- in the channel. The client can do what it wants with this number of
- bytes when the buffer_start() callback is invoked. Typically
- clients would use this to write per-channel header data.
-
-- resize_min - if set, this signifies that the channel is
- auto-resizeable. The value specifies the size that the channel will
- try to maintain as a normal working size, and that it won't go
- below. The client makes use of the resizing callbacks and
- relay_realloc_buffer() and relay_replace_buffer() to actually effect
- the resize.
-
-- resize_max - if set, this signifies that the channel is
- auto-resizeable. The value specifies the maximum size the channel
- can have as a result of resizing.
-
-- mode - if non-zero, specifies the file permissions that will be given
- to the channel file. If 0, the default rw user perms will be used.
-
-- init_buf - if non-NULL, rather than allocating the channel buffer,
- this buffer will be used as the initial channel buffer. The kernel
- API function relay_discard_init_buf() can later be used to have
- relayfs allocate a normal mmappable channel buffer and switch over
- to using it after copying the init_buf contents into it. Currently,
- the size of init_buf must be exactly buf_size * n_bufs. The caller
- is responsible for managing the init_buf memory. This feature is
- typically used for init-time channel use and should normally be
- specified as NULL.
-
-- init_buf_size - the total size of init_buf, if init_buf is specified
- as non-NULL. Currently, the size of init_buf must be exactly
- buf_size * n_bufs.
-
-Upon successful completion, relay_open() returns a channel id
-to be used for all other operations with the relay. All buffers
-managed by the relay are allocated using rvmalloc/rvfree to allow
-for easy mmapping to user-space.
-
-----------
-int relay_write(channel_id, *data_ptr, count, time_delta_offset, **wrote_pos)
-
-relay_write() reserves space in the channel and writes count bytes of
-data pointed to by data_ptr to it. Automatically performs any
-necessary locking, depending on the scheme and SMP usage in effect (no
-locking is done for the lockless scheme regardless of usage). It
-returns the number of bytes written, or 0/negative on failure. If
-time_delta_offset is >= 0, the internal time delta, the internal time
-delta calculated when the slot was reserved will be written at that
-offset. This is the TSC or gettimeofday() delta between the current
-write and the beginning of the buffer, whichever method is being used
-by the channel. Trying to write a count larger than the bufsize
-specified to relay_open() (taking into account the reserved
-start-of-buffer and end-of-buffer space as well) will fail. If
-wrote_pos is non-NULL, it will receive the location the data was
-written to, which may be needed for some applications but is not
-normally interesting. Most applications should pass in NULL for this
-param.
-
-----------
-struct rchan_reader *add_rchan_reader(int rchan_id, int auto_consume)
-
-add_rchan_reader creates and initializes a reader object for a
-channel. An opaque rchan_reader object is returned on success, and is
-passed to relay_read() when reading the channel. If the boolean
-auto_consume parameter is 1, the reader is defined to be
-auto-consuming. auto-consuming reader objects are automatically
-created and used for VFS read(2) readers.
-
-----------
-void remove_rchan_reader(struct rchan_reader *reader)
-
-remove_rchan_reader finds and removes the given reader from the
-channel. This function is used only by non-VFS read(2) readers. VFS
-read(2) readers are automatically removed when the corresponding file
-object is closed.
-
-----------
-reader add_map_reader(int rchan_id)
-
-Creates and initializes an rchan_reader object for channel map
-readers, and is needed for updating relay_bytes/buffers_consumed()
-when kernel clients become aware of the need to do so by their mmap
-user clients.
-
-----------
-int remove_map_reader(reader)
-
-Finds and removes the given map reader from the channel. This function
-is useful only for map readers.
-
-----------
-int relay_read(reader, buf, count, wait, *actual_read_offset)
-
-Reads count bytes from the channel, or as much as is available within
-the sub-buffer currently being read. The read offset that will be
-read from is the position contained within the reader object. If the
-wait flag is set, buf is non-NULL, and there is nothing available, it
-will wait until there is. If the wait flag is 0 and there is nothing
-available, -EAGAIN is returned. If buf is NULL, the value returned is
-the number of bytes that would have been read. actual_read_offset is
-the value that should be passed as the read offset to
-relay_bytes_consumed, needed only if the reader is not auto-consuming
-and the channel is MODE_NO_OVERWRITE, but in any case, it must not be
-NULL.
-
-----------
-
-int relay_bytes_avail(reader)
-
-Returns the number of bytes available relative to the reader's current
-read position within the corresponding sub-buffer, 0 if there is
-nothing available. Note that this doesn't return the total bytes
-available in the channel buffer - this is enough though to know if
-anything is available, however, or how many bytes might be returned
-from the next read.
-
-----------
-void relay_buffers_consumed(reader, buffers_consumed)
-
-Adds to the channel's consumed buffer count. buffers_consumed should
-be the number of buffers newly consumed, not the total number
-consumed. NOTE: kernel clients don't need to call this function if
-the reader is auto-consuming or the channel is MODE_CONTINUOUS.
-
-In order for the relay to detect the 'buffers full' condition for a
-channel, it must be kept up-to-date with respect to the number of
-buffers consumed by the client. If the addition of the value of the
-bufs_consumed param to the current bufs_consumed count for the channel
-would exceed the bufs_produced count for the channel, the channel's
-bufs_consumed count will be set to the bufs_produced count for the
-channel. This allows clients to 'catch up' if necessary.
-
-----------
-void relay_bytes_consumed(reader, bytes_consumed, read_offset)
-
-Adds to the channel's consumed count. bytes_consumed should be the
-number of bytes actually read e.g. return value of relay_read() and
-the read_offset should be the actual offset the bytes were read from
-e.g. the actual_read_offset set by relay_read(). NOTE: kernel clients
-don't need to call this function if the reader is auto-consuming or
-the channel is MODE_CONTINUOUS.
-
-In order for the relay to detect the 'buffers full' condition for a
-channel, it must be kept up-to-date with respect to the number of
-bytes consumed by the client. For packet clients, it makes more sense
-to update after each read rather than after each complete sub-buffer
-read. The bytes_consumed count updates bufs_consumed when a buffer
-has been consumed so this count remains consistent.
-
-----------
-int relay_info(channel_id, *channel_info)
-
-relay_info() fills in an rchan_info struct with channel status and
-attribute information such as usage modes, sub-buffer size and count,
-the allocated size of the entire buffer, buffers produced and
-consumed, current buffer id, count of writes lost due to buffers full
-condition.
-
-The virtual address of the channel buffer is also available here, for
-those clients that need it.
-
-Clients may need to know how many 'unused' bytes there are at the end
-of a given sub-buffer. This would only be the case if the client 1)
-didn't either write this count to the end of the sub-buffer or
-otherwise note it (it's available as the difference between the buffer
-end and current write pos params in the buffer_end callback) (if the
-client returned 0 from the buffer_end callback, it's assumed that this
-is indeed the case) 2) isn't using the read() system call to read the
-buffer. In other words, if the client isn't annotating the stream and
-is reading the buffer by mmaping it, this information would be needed
-in order for the client to 'skip over' the unused bytes at the ends of
-sub-buffers.
-
-Additionally, for the lockless scheme, clients may need to know
-whether a particular sub-buffer is actually complete. An array of
-boolean values, one per sub-buffer, contains non-zero if the buffer is
-complete, non-zero otherwise.
-
-----------
-int relay_close(channel_id)
-
-relay_close() is used to close the channel. It finalizes the last
-sub-buffer (the one currently being written to) and marks the channel
-as finalized. The channel buffer and channel data structure are then
-freed automatically when the last reference to the channel is given
-up.
-
-----------
-int relay_realloc_buffer(channel_id, nbufs, async)
-
-Allocates a new channel buffer using the specified sub-buffer count
-(note that resizing can't change sub-buffer sizes). If async is
-non-zero, the allocation is done in the background using a work queue.
-When the allocation has completed, the needs_resize() callback is
-called with a resize_type of RELAY_RESIZE_REPLACE. This function
-doesn't replace the old buffer with the new - see
-relay_replace_buffer().
-
-This function is called by kernel clients in response to a
-needs_resize() callback call with a resize type of RELAY_RESIZE_EXPAND
-or RELAY_RESIZE_SHRINK. That callback also includes a suggested
-new_bufsize and new_nbufs which should be used when calling this
-function.
-
-Returns 0 on success, or errcode if the channel is busy or if
-the allocation couldn't happen for some reason.
-
-NOTE: if async is not set, this function should not be called with a
-lock held, as it may sleep.
-
-----------
-int relay_replace_buffer(channel_id)
-
-Replaces the current channel buffer with the new buffer allocated by
-relay_realloc_buffer and contained in the channel struct. When the
-replacement is complete, the needs_resize() callback is called with
-RELAY_RESIZE_REPLACED. This function is called by kernel clients in
-response to a needs_resize() callback having a resize type of
-RELAY_RESIZE_REPLACE.
-
-Returns 0 on success, or errcode if the channel is busy or if the
-replacement or previous allocation didn't happen for some reason.
-
-NOTE: This function will not sleep, so can called in any context and
-with locks held. The client should, however, ensure that the channel
-isn't actively being read from or written to.
-
-----------
-int relay_reset(rchan_id)
-
-relay_reset() has the effect of erasing all data from the buffer and
-restarting the channel in its initial state. The buffer itself is not
-freed, so any mappings are still in effect. NOTE: Care should be
-taken that the channnel isn't actually being used by anything when
-this call is made.
-
-----------
-int rchan_full(reader)
-
-returns 1 if the channel is full with respect to the reader, 0 if not.
-
-----------
-int rchan_empty(reader)
-
-returns 1 if the channel is empty with respect to the reader, 0 if not.
-
-----------
-int relay_discard_init_buf(rchan_id)
-
-allocates an mmappable channel buffer, copies the contents of init_buf
-into it, and sets the current channel buffer to the newly allocated
-buffer. This function is used only in conjunction with the init_buf
-and init_buf_size params to relay_open(), and is typically used when
-the ability to write into the channel at init-time is needed. The
-basic usage is to specify an init_buf and init_buf_size to relay_open,
-then call this function when it's safe to switch over to a normally
-allocated channel buffer. 'Safe' means that the caller is in a
-context that can sleep and that nothing is actively writing to the
-channel. Returns 0 if successful, negative otherwise.
-
-
-Writing directly into the channel
-=================================
-
-Using the relay_write() API function as described above is the
-preferred means of writing into a channel. In some cases, however,
-in-kernel clients might want to write directly into a relay channel
-rather than have relay_write() copy it into the buffer on the client's
-behalf. Clients wishing to do this should follow the model used to
-implement relay_write itself. The general sequence is:
-
-- get a pointer to the channel via rchan_get(). This increments the
- channel's reference count.
-- call relay_lock_channel(). This will perform the proper locking for
- the channel given the scheme in use and the SMP usage.
-- reserve a slot in the channel via relay_reserve()
-- write directly to the reserved address
-- call relay_commit() to commit the write
-- call relay_unlock_channel()
-- call rchan_put() to release the channel reference
-
-In particular, clients should make sure they call rchan_get() and
-rchan_put() and not hold on to references to the channel pointer.
-Also, forgetting to use relay_lock_channel()/relay_unlock_channel()
-has no effect if the lockless scheme is being used, but could result
-in corrupted buffer contents if the locking scheme is used.
-
-
-Limitations
-===========
-
-Writes made via the write() system call are currently limited to 2
-pages worth of data. There is no such limit on the in-kernel API
-function relay_write().
-
-User applications can currently only mmap the complete buffer (it
-doesn't really make sense to mmap only part of it, given its purpose).
-
-
-Latest version
-==============
-
-The latest version can be found at:
-
-http://www.opersys.com/relayfs
-
-Example relayfs clients, such as dynamic printk and the Linux Trace
-Toolkit, can also be found there.
-
-
-Credits
-=======
-
-The ideas and specs for relayfs came about as a result of discussions
-on tracing involving the following:
-
-Michel Dagenais <michel.dagenais@polymtl.ca>
-Richard Moore <richardj_moore@uk.ibm.com>
-Bob Wisniewski <bob@watson.ibm.com>
-Karim Yaghmour <karim@opersys.com>
-Tom Zanussi <zanussi@us.ibm.com>
-
-Also thanks to Hubertus Franke for a lot of useful suggestions and bug
-reports, and for contributing the klog code.
+++ /dev/null
-
-Numa policy hit/miss statistics
-
-/sys/devices/system/node/node*/numastat
-
-All units are pages. Hugepages have separate counters.
-
-numa_hit A process wanted to allocate memory from this node,
- and succeeded.
-numa_miss A process wanted to allocate memory from this node,
- but ended up with memory from another.
-numa_foreign A process wanted to allocate on another node,
- but ended up with memory from this one.
-local_node A process ran on this node and got memory from it.
-other_node A process ran on this node and got memory from another node.
-interleave_hit Interleaving wanted to allocate from this node
- and succeeded.
-
-For easier reading you can use the numastat utility from the numactl package
-(ftp://ftp.suse.com/pub/people/ak/numa/numactl*). Note that it only works
-well right now on machines with a small number of CPUs.
-
+++ /dev/null
-Each CPU has a "base" scheduling domain (struct sched_domain). These are
-accessed via cpu_sched_domain(i) and this_sched_domain() macros. The domain
-hierarchy is built from these base domains via the ->parent pointer. ->parent
-MUST be NULL terminated, and domain structures should be per-CPU as they
-are locklessly updated.
-
-Each scheduling domain spans a number of CPUs (stored in the ->span field).
-A domain's span MUST be a superset of it child's span, and a base domain
-for CPU i MUST span at least i. The top domain for each CPU will generally
-span all CPUs in the system although strictly it doesn't have to, but this
-could lead to a case where some CPUs will never be given tasks to run unless
-the CPUs allowed mask is explicitly set. A sched domain's span means "balance
-process load among these CPUs".
-
-Each scheduling domain must have one or more CPU groups (struct sched_group)
-which are organised as a circular one way linked list from the ->groups
-pointer. The union of cpumasks of these groups MUST be the same as the
-domain's span. The intersection of cpumasks from any two of these groups
-MUST be the empty set. The group pointed to by the ->groups pointer MUST
-contain the CPU to which the domain belongs. Groups may be shared among
-CPUs as they contain read only data after they have been set up.
-
-Balancing within a sched domain occurs between groups. That is, each group
-is treated as one entity. The load of a group is defined as the sum of the
-load of each of its member CPUs, and only when the load of a group becomes
-out of balance are tasks moved between groups.
-
-In kernel/sched.c, rebalance_tick is run periodically on each CPU. This
-function takes its CPU's base sched domain and checks to see if has reached
-its rebalance interval. If so, then it will run load_balance on that domain.
-rebalance_tick then checks the parent sched_domain (if it exists), and the
-parent of the parent and so forth.
-
-*** Implementing sched domains ***
-The "base" domain will "span" the first level of the hierarchy. In the case
-of SMT, you'll span all siblings of the physical CPU, with each group being
-a single virtual CPU.
-
-In SMP, the parent of the base domain will span all physical CPUs in the
-node. Each group being a single physical CPU. Then with NUMA, the parent
-of the SMP domain will span the entire machine, with each group having the
-cpumask of a node. Or, you could do multi-level NUMA or Opteron, for example,
-might have just one domain covering its one NUMA level.
-
-The implementor should read comments in include/linux/sched.h:
-struct sched_domain fields, SD_FLAG_*, SD_*_INIT to get an idea of
-the specifics and what to tune.
-
-Implementors should change the line
-#undef SCHED_DOMAIN_DEBUG
-to
-#define SCHED_DOMAIN_DEBUG
-in kernel/sched.c as this enables an error checking parse of the sched domains
-which should catch most possible errors (described above). It also prints out
-the domain structure in a visual format.
+++ /dev/null
-The sym53c500_cs driver originated as an add-on to David Hinds' pcmcia-cs
-package, and was written by Tom Corner (tcorner@via.at). A rewrite was
-long overdue, and the current version addresses the following concerns:
-
- (1) extensive kernel changes between 2.4 and 2.6.
- (2) deprecated PCMCIA support outside the kernel.
-
-All the USE_BIOS code has been ripped out. It was never used, and could
-not have worked anyway. The USE_DMA code is likewise gone. Many thanks
-to YOKOTA Hiroshi (nsp_cs driver) and David Hinds (qlogic_cs driver) for
-the code fragments I shamelessly adapted for this work. Thanks also to
-Christoph Hellwig for his patient tutelage while I stumbled about.
-
-The Symbios Logic 53c500 chip was used in the "newer" (circa 1997) version
-of the New Media Bus Toaster PCMCIA SCSI controller. Presumably there are
-other products using this chip, but I've never laid eyes (much less hands)
-on one.
-
-Through the years, there have been a number of downloads of the pcmcia-cs
-version of this driver, and I guess it worked for those users. It worked
-for Tom Corner, and it works for me. Your mileage will probably vary.
-
---Bob Tracy (rct@frus.com)
+++ /dev/null
-
-config ARCH_SUPPORTS_BIG_ENDIAN
- bool
- depends on ARCH_IXP4XX
- default y
-
-menu "Intel IXP4xx Implementation Options"
-
-comment "IXP4xx Platforms"
-
-config ARCH_AVILA
- bool "Avila"
- depends on ARCH_IXP4XX
- help
- Say 'Y' here if you want your kernel to support the Gateworks
- Avila Network Platform. For more information on this platform,
- see Documentation/arm/IXP4xx.
-
-config ARCH_ADI_COYOTE
- bool "Coyote"
- depends on ARCH_IXP4XX
- help
- Say 'Y' here if you want your kernel to support the ADI
- Engineering Coyote Gateway Reference Platform. For more
- information on this platform, see Documentation/arm/IXP4xx.
-
-config ARCH_IXDP425
- bool "IXDP425"
- depends on ARCH_IXP4XX
- help
- Say 'Y' here if you want your kernel to support Intel's
- IXDP425 Development Platform (Also known as Richfield).
- For more information on this platform, see Documentation/arm/IXP4xx.
-
-#
-# IXCDP1100 is the exact same HW as IXDP425, but with a different machine
-# number from the bootloader due to marketing monkeys, so we just enable it
-# by default if IXDP425 is enabled.
-#
-config ARCH_IXCDP1100
- bool
- depends on ARCH_IXDP425
- default y
-
-config ARCH_PRPMC1100
- bool "PrPMC1100"
- depends on ARCH_IXP4XX
- help
- Say 'Y' here if you want your kernel to support the Motorola
- PrPCM1100 Processor Mezanine Module. For more information on
- this platform, see Documentation/arm/IXP4xx.
-
-#
-# Avila and IXDP share the same source for now. Will change in future
-#
-config ARCH_IXDP4XX
- bool
- depends on ARCH_IXDP425 || ARCH_AVILA
- default y
-
-comment "IXP4xx Options"
-
-config IXP4XX_INDIRECT_PCI
- bool "Use indirect PCI memory access"
- depends on ARCH_IXP4XX
- help
- IXP4xx provides two methods of accessing PCI memory space:
-
- 1) A direct mapped window from 0x48000000 to 0x4bffffff (64MB).
- To access PCI via this space, we simply ioremap() the BAR
- into the kernel and we can use the standard read[bwl]/write[bwl]
- macros. This is the preffered method due to speed but it
- limits the system to just 64MB of PCI memory. This can be
- problamatic if using video cards and other memory-heavy devices.
-
- 2) If > 64MB of memory space is required, the IXP4xx can be
- configured to use indirect registers to access PCI This allows
- for up to 128MB (0x48000000 to 0x4fffffff) of memory on the bus.
- The disadvantadge of this is that every PCI access requires
- three local register accesses plus a spinlock, but in some
- cases the performance hit is acceptable. In addition, you cannot
- mmap() PCI devices in this case due to the indirect nature
- of the PCI window.
-
- By default, the direct method is used. Choose this option if you
- need to use the indirect method instead. If you don't know
- what you need, leave this option unselected.
-
-endmenu
+++ /dev/null
-/*
- * arch/arm/mach-ixp4xx/coyote-setup.c
- *
- * ADI Engineering Coyote board-setup
- *
- * Copyright (C) 2003-2004 MontaVista Software, Inc.
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- */
-
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial.h>
-#include <linux/tty.h>
-#include <linux/serial_core.h>
-
-#include <asm/types.h>
-#include <asm/setup.h>
-#include <asm/memory.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-#include <asm/mach/arch.h>
-#include <asm/mach/flash.h>
-
-#ifdef __ARMEB__
-#define REG_OFFSET 3
-#else
-#define REG_OFFSET 0
-#endif
-
-/*
- * Only one serial port is connected on the Coyote.
- */
-static struct uart_port coyote_serial_port = {
- .membase = (char*)(IXP4XX_UART2_BASE_VIRT + REG_OFFSET),
- .mapbase = (IXP4XX_UART2_BASE_PHYS),
- .irq = IRQ_IXP4XX_UART2,
- .flags = UPF_SKIP_TEST,
- .iotype = UPIO_MEM,
- .regshift = 2,
- .uartclk = IXP4XX_UART_XTAL,
- .line = 0,
- .type = PORT_XSCALE,
- .fifosize = 32
-};
-
-void __init coyote_map_io(void)
-{
- early_serial_setup(&coyote_serial_port);
-
- ixp4xx_map_io();
-}
-
-static struct flash_platform_data coyote_flash_data = {
- .map_name = "cfi_probe",
- .width = 2,
-};
-
-static struct resource coyote_flash_resource = {
- .start = COYOTE_FLASH_BASE,
- .end = COYOTE_FLASH_BASE + COYOTE_FLASH_SIZE,
- .flags = IORESOURCE_MEM,
-};
-
-static struct platform_device coyote_flash_device = {
- .name = "IXP4XX-Flash",
- .id = 0,
- .dev = {
- .platform_data = &coyote_flash_data,
- },
- .num_resources = 1,
- .resource = &coyote_flash_resource,
-};
-
-static void __init coyote_init(void)
-{
- platform_add_device(&coyote_flash_device);
-}
-
-MACHINE_START(ADI_COYOTE, "ADI Engineering IXP4XX Coyote Development Platform")
- MAINTAINER("MontaVista Software, Inc.")
- BOOT_MEM(PHYS_OFFSET, IXP4XX_PERIPHERAL_BASE_PHYS,
- IXP4XX_PERIPHERAL_BASE_VIRT)
- MAPIO(coyote_map_io)
- INITIRQ(ixp4xx_init_irq)
- BOOT_PARAMS(0x0100)
- INIT_MACHINE(coyote_init)
-MACHINE_END
-
+++ /dev/null
-/*
- * arch/arm/mach-ixp4xx/ixdp425-setup.c
- *
- * IXDP425/IXCDP1100 board-setup
- *
- * Copyright (C) 2003-2004 MontaVista Software, Inc.
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- */
-
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial.h>
-#include <linux/tty.h>
-#include <linux/serial_core.h>
-
-#include <asm/types.h>
-#include <asm/setup.h>
-#include <asm/memory.h>
-#include <asm/hardware.h>
-#include <asm/mach-types.h>
-#include <asm/irq.h>
-#include <asm/mach/arch.h>
-#include <asm/mach/flash.h>
-
-#ifdef __ARMEB__
-#define REG_OFFSET 3
-#else
-#define REG_OFFSET 0
-#endif
-
-/*
- * IXDP425 uses both chipset serial ports
- */
-static struct uart_port ixdp425_serial_ports[] = {
- {
- .membase = (char*)(IXP4XX_UART1_BASE_VIRT + REG_OFFSET),
- .mapbase = (IXP4XX_UART1_BASE_PHYS),
- .irq = IRQ_IXP4XX_UART1,
- .flags = UPF_SKIP_TEST,
- .iotype = UPIO_MEM,
- .regshift = 2,
- .uartclk = IXP4XX_UART_XTAL,
- .line = 0,
- .type = PORT_XSCALE,
- .fifosize = 32
- } , {
- .membase = (char*)(IXP4XX_UART2_BASE_VIRT + REG_OFFSET),
- .mapbase = (IXP4XX_UART2_BASE_PHYS),
- .irq = IRQ_IXP4XX_UART2,
- .flags = UPF_SKIP_TEST,
- .iotype = UPIO_MEM,
- .regshift = 2,
- .uartclk = IXP4XX_UART_XTAL,
- .line = 1,
- .type = PORT_XSCALE,
- .fifosize = 32
- }
-};
-
-void __init ixdp425_map_io(void)
-{
- early_serial_setup(&ixdp425_serial_ports[0]);
- early_serial_setup(&ixdp425_serial_ports[1]);
-
- ixp4xx_map_io();
-}
-
-static struct flash_platform_data ixdp425_flash_data = {
- .map_name = "cfi_probe",
- .width = 2,
-};
-
-static struct resource ixdp425_flash_resource = {
- .start = IXDP425_FLASH_BASE,
- .end = IXDP425_FLASH_BASE + IXDP425_FLASH_SIZE,
- .flags = IORESOURCE_MEM,
-};
-
-static struct platform_device ixdp425_flash_device = {
- .name = "IXP4XX-Flash",
- .id = 0,
- .dev = {
- .platform_data = &ixdp425_flash_data,
- },
- .num_resources = 1,
- .resource = &ixdp425_flash_resource,
-};
-
-static struct ixp4xx_i2c_pins ixdp425_i2c_gpio_pins = {
- .sda_pin = IXDP425_SDA_PIN,
- .scl_pin = IXDP425_SCL_PIN,
-};
-
-static struct platform_device ixdp425_i2c_controller = {
- .name = "IXP4XX-I2C",
- .id = 0,
- .dev = {
- .platform_data = &ixdp425_i2c_gpio_pins,
- },
- .num_resources = 0
-};
-
-static void __init ixdp425_init(void)
-{
- platform_add_device(&ixdp425_flash_device);
- platform_add_device(&ixdp425_i2c_controller);
-}
-
-MACHINE_START(IXDP425, "Intel IXDP425 Development Platform")
- MAINTAINER("MontaVista Software, Inc.")
- BOOT_MEM(PHYS_OFFSET, IXP4XX_PERIPHERAL_BASE_PHYS,
- IXP4XX_PERIPHERAL_BASE_VIRT)
- MAPIO(ixdp425_map_io)
- INITIRQ(ixp4xx_init_irq)
- BOOT_PARAMS(0x0100)
- INIT_MACHINE(ixdp425_init)
-MACHINE_END
-
-MACHINE_START(IXCDP1100, "Intel IXCDP1100 Development Platform")
- MAINTAINER("MontaVista Software, Inc.")
- BOOT_MEM(PHYS_OFFSET, IXP4XX_PERIPHERAL_BASE_PHYS,
- IXP4XX_PERIPHERAL_BASE_VIRT)
- MAPIO(ixdp425_map_io)
- INITIRQ(ixp4xx_init_irq)
- BOOT_PARAMS(0x0100)
- INIT_MACHINE(ixdp425_init)
-MACHINE_END
-
-/*
- * Avila is functionally equivalent to IXDP425 except that it adds
- * a CF IDE slot hanging off the expansion bus. When we have a
- * driver for IXP4xx CF IDE with driver model support we'll move
- * Avila to it's own setup file.
- */
-#ifdef CONFIG_ARCH_AVILA
-MACHINE_START(AVILA, "Gateworks Avila Network Platform")
- MAINTAINER("Deepak Saxena <dsaxena@plexity.net>")
- BOOT_MEM(PHYS_OFFSET, IXP4XX_PERIPHERAL_BASE_PHYS,
- IXP4XX_PERIPHERAL_BASE_VIRT)
- MAPIO(ixdp425_map_io)
- INITIRQ(ixp4xx_init_irq)
- BOOT_PARAMS(0x0100)
- INIT_MACHINE(ixdp425_init)
-MACHINE_END
-#endif
-
+++ /dev/null
-/*
- * linux/arch/arm/mach-pxa/leds-mainstone.c
- *
- * Author: Nicolas Pitre
- * Created: Nov 05, 2002
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-
-#include <asm/hardware.h>
-#include <asm/leds.h>
-#include <asm/system.h>
-
-#include "leds.h"
-
-
-/* 8 discrete leds available for general use: */
-#define D28 (1 << 0)
-#define D27 (1 << 1)
-#define D26 (1 << 2)
-#define D25 (1 << 3)
-#define D24 (1 << 4)
-#define D23 (1 << 5)
-#define D22 (1 << 6)
-#define D21 (1 << 7)
-
-#define LED_STATE_ENABLED 1
-#define LED_STATE_CLAIMED 2
-
-static unsigned int led_state;
-static unsigned int hw_led_state;
-
-void mainstone_leds_event(led_event_t evt)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
- switch (evt) {
- case led_start:
- hw_led_state = 0;
- led_state = LED_STATE_ENABLED;
- break;
-
- case led_stop:
- led_state &= ~LED_STATE_ENABLED;
- break;
-
- case led_claim:
- led_state |= LED_STATE_CLAIMED;
- hw_led_state = 0;
- break;
-
- case led_release:
- led_state &= ~LED_STATE_CLAIMED;
- hw_led_state = 0;
- break;
-
-#ifdef CONFIG_LEDS_TIMER
- case led_timer:
- hw_led_state ^= D26;
- break;
-#endif
-
-#ifdef CONFIG_LEDS_CPU
- case led_idle_start:
- hw_led_state &= ~D27;
- break;
-
- case led_idle_end:
- hw_led_state |= D27;
- break;
-#endif
-
- case led_halted:
- break;
-
- case led_green_on:
- hw_led_state |= D21;;
- break;
-
- case led_green_off:
- hw_led_state &= ~D21;
- break;
-
- case led_amber_on:
- hw_led_state |= D22;;
- break;
-
- case led_amber_off:
- hw_led_state &= ~D22;
- break;
-
- case led_red_on:
- hw_led_state |= D23;;
- break;
-
- case led_red_off:
- hw_led_state &= ~D23;
- break;
-
- default:
- break;
- }
-
- if (led_state & LED_STATE_ENABLED)
- MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
- else
- MST_LEDCTRL |= 0xff;
-
- local_irq_restore(flags);
-}
+++ /dev/null
-/*
- * linux/arch/arm/mach-pxa/mainstone.c
- *
- * Support for the Intel HCDDBBVA0 Development Platform.
- * (go figure how they came up with such name...)
- *
- * Author: Nicolas Pitre
- * Created: Nov 05, 2002
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/bitops.h>
-
-#include <asm/types.h>
-#include <asm/setup.h>
-#include <asm/memory.h>
-#include <asm/mach-types.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
-
-#include <asm/mach/arch.h>
-#include <asm/mach/map.h>
-#include <asm/mach/irq.h>
-
-#include "generic.h"
-
-
-static unsigned long mainstone_irq_enabled;
-
-static void mainstone_mask_irq(unsigned int irq)
-{
- int mainstone_irq = (irq - MAINSTONE_IRQ(0));
- MST_INTMSKENA = (mainstone_irq_enabled &= ~(1 << mainstone_irq));
-}
-
-static void mainstone_unmask_irq(unsigned int irq)
-{
- int mainstone_irq = (irq - MAINSTONE_IRQ(0));
- /* the irq can be acknowledged only if deasserted, so it's done here */
- MST_INTSETCLR &= ~(1 << mainstone_irq);
- MST_INTMSKENA = (mainstone_irq_enabled |= (1 << mainstone_irq));
-}
-
-static struct irqchip mainstone_irq_chip = {
- .ack = mainstone_mask_irq,
- .mask = mainstone_mask_irq,
- .unmask = mainstone_unmask_irq,
-};
-
-
-static void mainstone_irq_handler(unsigned int irq, struct irqdesc *desc,
- struct pt_regs *regs)
-{
- unsigned long pending = MST_INTSETCLR & mainstone_irq_enabled;
- do {
- GEDR(0) = GPIO_bit(0); /* clear useless edge notification */
- if (likely(pending)) {
- irq = MAINSTONE_IRQ(0) + __ffs(pending);
- desc = irq_desc + irq;
- desc->handle(irq, desc, regs);
- }
- pending = MST_INTSETCLR & mainstone_irq_enabled;
- } while (pending);
-}
-
-static void __init mainstone_init_irq(void)
-{
- int irq;
-
- pxa_init_irq();
-
- /* setup extra Mainstone irqs */
- for(irq = MAINSTONE_IRQ(0); irq <= MAINSTONE_IRQ(15); irq++) {
- set_irq_chip(irq, &mainstone_irq_chip);
- set_irq_handler(irq, do_level_IRQ);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
- }
- set_irq_flags(MAINSTONE_IRQ(8), 0);
- set_irq_flags(MAINSTONE_IRQ(12), 0);
-
- MST_INTMSKENA = 0;
- MST_INTSETCLR = 0;
-
- set_irq_chained_handler(IRQ_GPIO(0), mainstone_irq_handler);
- set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
-}
-
-
-static struct resource smc91x_resources[] = {
- [0] = {
- .start = (MST_ETH_PHYS + 0x300),
- .end = (MST_ETH_PHYS + 0xfffff),
- .flags = IORESOURCE_MEM,
- },
- [1] = {
- .start = MAINSTONE_IRQ(3),
- .end = MAINSTONE_IRQ(3),
- .flags = IORESOURCE_IRQ,
- }
-};
-
-static struct platform_device smc91x_device = {
- .name = "smc91x",
- .id = 0,
- .num_resources = ARRAY_SIZE(smc91x_resources),
- .resource = smc91x_resources,
-};
-
-static void __init mainstone_init(void)
-{
- platform_add_device(&smc91x_device);
-}
-
-
-static struct map_desc mainstone_io_desc[] __initdata = {
- { MST_FPGA_VIRT, MST_FPGA_PHYS, 0x00100000, MT_DEVICE }, /* CPLD */
-};
-
-static void __init mainstone_map_io(void)
-{
- pxa_map_io();
- iotable_init(mainstone_io_desc, ARRAY_SIZE(mainstone_io_desc));
-}
-
-MACHINE_START(MAINSTONE, "Intel HCDDBBVA0 Development Platform (aka Mainstone)")
- MAINTAINER("MontaVista Software Inc.")
- BOOT_MEM(0xa0000000, 0x40000000, io_p2v(0x40000000))
- MAPIO(mainstone_map_io)
- INITIRQ(mainstone_init_irq)
- INIT_MACHINE(mainstone_init)
-MACHINE_END
+++ /dev/null
-/*
- * linux/arch/arm/mach-pxa/pxa25x.c
- *
- * Author: Nicolas Pitre
- * Created: Jun 15, 2001
- * Copyright: MontaVista Software Inc.
- *
- * Code specific to PXA21x/25x/26x variants.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Since this file should be linked before any other machine specific file,
- * the __initcall() here will be executed first. This serves as default
- * initialization stuff for PXA machines which can be overridden later if
- * need be.
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/pm.h>
-
-#include <asm/hardware.h>
-
-#include "generic.h"
-
-/*
- * Various clock factors driven by the CCCR register.
- */
-
-/* Crystal Frequency to Memory Frequency Multiplier (L) */
-static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
-
-/* Memory Frequency to Run Mode Frequency Multiplier (M) */
-static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
-
-/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
-/* Note: we store the value N * 2 here. */
-static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
-
-/* Crystal clock */
-#define BASE_CLK 3686400
-
-/*
- * Get the clock frequency as reflected by CCCR and the turbo flag.
- * We assume these values have been applied via a fcs.
- * If info is not 0 we also display the current settings.
- */
-unsigned int get_clk_frequency_khz(int info)
-{
- unsigned long cccr, turbo;
- unsigned int l, L, m, M, n2, N;
-
- cccr = CCCR;
- asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
-
- l = L_clk_mult[(cccr >> 0) & 0x1f];
- m = M_clk_mult[(cccr >> 5) & 0x03];
- n2 = N2_clk_mult[(cccr >> 7) & 0x07];
-
- L = l * BASE_CLK;
- M = m * L;
- N = n2 * M / 2;
-
- if(info)
- {
- L += 5000;
- printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
- L / 1000000, (L % 1000000) / 10000, l );
- M += 5000;
- printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
- M / 1000000, (M % 1000000) / 10000, m );
- N += 5000;
- printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
- N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
- (turbo & 1) ? "" : "in" );
- }
-
- return (turbo & 1) ? (N/1000) : (M/1000);
-}
-
-EXPORT_SYMBOL(get_clk_frequency_khz);
-
-/*
- * Return the current lclk requency in units of 10kHz
- */
-unsigned int get_lclk_frequency_10khz(void)
-{
- return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
-}
-
-EXPORT_SYMBOL(get_lclk_frequency_10khz);
-
+++ /dev/null
-/*
- * linux/arch/arm/mach-pxa/pxa27x.c
- *
- * Author: Nicolas Pitre
- * Created: Nov 05, 2002
- * Copyright: MontaVista Software Inc.
- *
- * Code specific to PXA27x aka Bulverde.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/pm.h>
-
-#include <asm/hardware.h>
-
-#include "generic.h"
-
-/* Crystal clock : 13-MHZ*/
-#define BASE_CLK 13000000
-
-/*
- * Get the clock frequency as reflected by CCSR and the turbo flag.
- * We assume these values have been applied via a fcs.
- * If info is not 0 we also display the current settings.
- *
- * For more details, refer to Bulverde Manual, section 3.8.2.1
- */
-unsigned int get_clk_frequency_khz( int info)
-{
- unsigned long ccsr, turbo, b, ht;
- unsigned int l, L, m, M, n2, N, S, cccra;
-
- ccsr = CCSR;
- cccra = CCCR & (0x1 << 25);
-
- /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
- asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
- b = (turbo & (0x1 << 3));
- ht = (turbo & (0x1 << 2));
-
- l = ccsr & 0x1f;
- n2 = (ccsr>>7) & 0xf;
- if (l == 31) {
- /* The calculation from the Yellow Book is incorrect:
- it says M=4 for L=21-30 (which is easy to calculate
- by subtracting 1 and then dividing by 10, but not
- with 31, so we'll do it manually */
- m = 1 << 2;
- } else {
- m = 1 << ((l-1)/10);
- }
-
- L = l * BASE_CLK;
- N = (n2 * L) / 2;
- S = (b) ? L : (L/2);
- if (cccra == 0)
- M = L/m;
- else
- M = (b) ? L : (L/2);
-
- if (info) {
- printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
- L / 1000000, (L % 1000000) / 10000, l );
- printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
- M / 1000000, (M % 1000000) / 10000, m );
- printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
- N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
- (turbo & 1) ? "" : "in" );
- printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
- S / 1000000, (S % 1000000) / 10000 );
- }
-
- return (turbo & 1) ? (N/1000) : (L/1000);
-}
-
-/*
- * Return the current mem clock frequency in units of 10kHz as
- * reflected by CCCR[A], B, and L
- */
-unsigned int get_lclk_frequency_10khz(void)
-{
- unsigned long ccsr, clkcfg, b;
- unsigned int l, L, m, M, cccra;
-
- cccra = CCCR & (0x1 << 25);
-
- /* Read clkcfg register to obtain b */
- asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
- b = (clkcfg & (0x1 << 3));
-
- ccsr = CCSR;
- l = ccsr & 0x1f;
- if (l == 31) {
- /* The calculation from the Yellow Book is incorrect:
- it says M=4 for L=21-30 (which is easy to calculate
- by subtracting 1 and then dividing by 10, but not
- with 31, so we'll do it manually */
- m = 1 << 2;
- } else {
- m = 1 << ((l-1)/10);
- }
-
- L = l * BASE_CLK;
- if (cccra == 0)
- M = L/m;
- else
- M = (b) ? L : L/2;
-
- return (M / 10000);
-}
-
-EXPORT_SYMBOL(get_clk_frequency_khz);
-EXPORT_SYMBOL(get_lclk_frequency_10khz);
-
+++ /dev/null
-menu "Processor type and features"
-
-choice
- prompt "H8/300 platform"
- default H8300H_GENERIC
-
-config H8300H_GENERIC
- bool "H8/300H Generic"
- help
- H8/300H CPU Generic Hardware Support
-
-config H8300H_AKI3068NET
- bool "AE-3068/69"
- help
- AKI-H8/3068F / AKI-H8/3069F Flashmicom LAN Board Support
- More Information. (Japanese Only)
- <http://akizukidensi.com/catalog/h8.html>
- AE-3068/69 Evaluation Board Support
- More Information.
- <http://www.microtronique.com/ae3069lan.htm>
-
-config H8300H_H8MAX
- bool "H8MAX"
- help
- H8MAX Evaluation Board Support
- More Information. (Japanese Only)
- <http://strawberry-linux.com/h8/index.html>
-
-config H8300H_SIM
- bool "H8/300H Simulator"
- help
- GDB Simulator Support
- More Information.
- arch/h8300/Doc/simulator.txt
-
-config H8S_GENERIC
- bool "H8S Generic"
- help
- H8S CPU Generic Hardware Support
-
-config H8S_EDOSK2674
- bool "EDOSK-2674"
- help
- Renesas EDOSK-2674 Evaluation Board Support
- More Information.
- <http://www.azpower.com/H8-uClinux/index.html>
- <http://www.eu.renesas.com/tools/edk/support/edosk2674.html>
-
-config H8S_SIM
- bool "H8S Simulator"
- help
- GDB Simulator Support
- More Information.
- arch/h8300/Doc/simulator.txt
-
-endchoice
-
-if (H8300H_GENERIC || H8S_GENERIC)
-menu "Detail Selection"
-if (H8300H_GENERIC)
-choice
- prompt "CPU Selection"
-
-config H83002
- bool "H8/3001,3002,3003"
-
-config H83007
- bool "H8/3006,3007"
-
-config H83048
- bool "H8/3044,3045,3046,3047,3048,3052"
-
-config H83068
- bool "H8/3065,3066,3067,3068,3069"
-endchoice
-endif
-
-if (H8S_GENERIC)
-choice
- prompt "CPU Selection"
-
-config H8S2678
- bool "H8S/2670,2673,2674R,2675,2676"
-endchoice
-endif
-
-config CPU_CLOCK
- int "CPU Clock Frequency (/1KHz)"
- default "20000"
- help
- CPU Clock Frequency divide to 1000
-endmenu
-endif
-
-if (H8300H_GENERIC || H8S_GENERIC || H8300H_SIM || H8S_SIM || H8S_EDOSK2674)
-choice
- prompt "Kernel executes from"
- ---help---
- Choose the memory type that the kernel will be running in.
-
-config RAMKERNEL
- bool "RAM"
- help
- The kernel will be resident in RAM when running.
-
-config ROMKERNEL
- bool "ROM"
- help
- The kernel will be resident in FLASH/ROM when running.
-
-endchoice
-endif
-
-if (H8300H_AKI3068NET)
-config H83068
- bool
- default y
-
-config CPU_CLOCK
- int
- default "20000"
-
-config RAMKERNEL
- bool
- default y
-endif
-
-if (H8300H_H8MAX)
-config H83068
- bool
- default y
-
-config CPU_CLOCK
- int
- default 25000
-
-config RAMKERNEL
- bool
- default y
-endif
-
-if (H8300H_SIM)
-config H83007
- bool
- default y
-
-config CPU_CLOCK
- int
- default "16000"
-endif
-
-if (H8S_EDOSK2674)
-config H8S2678
- bool
- default y
-config CPU_CLOCK
- int
- default 33000
-endif
-
-if (H8S_SIM)
-config H8S2678
- bool
- default y
-config CPU_CLOCK
- int
- default 33000
-endif
-
-config CPU_H8300H
- bool
- depends on (H8002 || H83007 || H83048 || H83068)
- default y
-
-config CPU_H8S
- bool
- depends on H8S2678
- default y
-
-config PREEMPT
- bool "Preemptible Kernel"
- default n
-endmenu
+++ /dev/null
-#include <linux/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt...)
-#endif
-
-void *module_alloc(unsigned long size)
-{
- if (size == 0)
- return NULL;
- return vmalloc(size);
-}
-
-
-/* Free memory returned from module_alloc */
-void module_free(struct module *mod, void *module_region)
-{
- vfree(module_region);
- /* FIXME: If module_region == mod->init_region, trim exception
- table entries. */
-}
-
-/* We don't need anything special. */
-int module_frob_arch_sections(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- char *secstrings,
- struct module *mod)
-{
- return 0;
-}
-
-int apply_relocate(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- printk(KERN_ERR "module %s: RELOCATION unsupported\n",
- me->name);
- return -ENOEXEC;
-}
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- unsigned int i;
- Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
-
- DEBUGP("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
- for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
- /* This is where to make the change */
- uint32_t *loc = (uint32_t *)(sechdrs[sechdrs[relsec].sh_info].sh_addr
- + rela[i].r_offset);
- /* This is the symbol it is referring to. Note that all
- undefined symbols have been resolved. */
- Elf32_Sym *sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
- + ELF32_R_SYM(rela[i].r_info);
- uint32_t v = sym->st_value + rela[i].r_addend;
-
- switch (ELF32_R_TYPE(rela[i].r_info)) {
- case R_H8_DIR24R8:
- loc = (uint32_t *)((uint32_t)loc - 1);
- *loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
- break;
- case R_H8_DIR24A8:
- if (ELF32_R_SYM(rela[i].r_info))
- *loc += v;
- break;
- case R_H8_DIR32:
- case R_H8_DIR32A16:
- *loc += v;
- break;
- case R_H8_PCREL16:
- v -= (unsigned long)loc + 2;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000)
- goto overflow;
- else
- *(unsigned short *)loc = v;
- break;
- case R_H8_PCREL8:
- v -= (unsigned long)loc + 1;
- if ((Elf32_Sword)v > 0x7f ||
- (Elf32_Sword)v < -(Elf32_Sword)0x80)
- goto overflow;
- else
- *(unsigned char *)loc = v;
- break;
- default:
- printk(KERN_ERR "module %s: Unknown relocation: %u\n",
- me->name, ELF32_R_TYPE(rela[i].r_info));
- return -ENOEXEC;
- }
- }
- return 0;
- overflow:
- printk(KERN_ERR "module %s: relocation offset overflow: %08x\n",
- me->name, rela[i].r_offset);
- return -ENOEXEC;
-}
-
-int module_finalize(const Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- struct module *me)
-{
- return 0;
-}
-
-void module_arch_cleanup(struct module *mod)
-{
-}
+++ /dev/null
-/*
- * linux/arch/i386/kernel/entry_trampoline.c
- *
- * (C) Copyright 2003 Ingo Molnar
- *
- * This file contains the needed support code for 4GB userspace
- */
-
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/highmem.h>
-#include <asm/desc.h>
-#include <asm/atomic_kmap.h>
-
-extern char __entry_tramp_start, __entry_tramp_end, __start___entry_text;
-
-void __init init_entry_mappings(void)
-{
-#ifdef CONFIG_X86_HIGH_ENTRY
-
- void *tramp;
- int p;
-
- /*
- * We need a high IDT and GDT for the 4G/4G split:
- */
- trap_init_virtual_IDT();
-
- __set_fixmap(FIX_ENTRY_TRAMPOLINE_0, __pa((unsigned long)&__entry_tramp_start), PAGE_KERNEL);
- __set_fixmap(FIX_ENTRY_TRAMPOLINE_1, __pa((unsigned long)&__entry_tramp_start) + PAGE_SIZE, PAGE_KERNEL);
- tramp = (void *)fix_to_virt(FIX_ENTRY_TRAMPOLINE_0);
-
- printk("mapped 4G/4G trampoline to %p.\n", tramp);
- BUG_ON((void *)&__start___entry_text != tramp);
- /*
- * Virtual kernel stack:
- */
- BUG_ON(__kmap_atomic_vaddr(KM_VSTACK_TOP) & (THREAD_SIZE-1));
- BUG_ON(sizeof(struct desc_struct)*NR_CPUS*GDT_ENTRIES > 2*PAGE_SIZE);
- BUG_ON((unsigned int)&__entry_tramp_end - (unsigned int)&__entry_tramp_start > 2*PAGE_SIZE);
-
- /*
- * set up the initial thread's virtual stack related
- * fields:
- */
- for (p = 0; p < ARRAY_SIZE(current->thread.stack_page); p++)
- current->thread.stack_page[p] = virt_to_page((char *)current->thread_info + (p*PAGE_SIZE));
-
- current->thread_info->virtual_stack = (void *)__kmap_atomic_vaddr(KM_VSTACK_TOP);
-
- for (p = 0; p < ARRAY_SIZE(current->thread.stack_page); p++) {
- __kunmap_atomic_type(KM_VSTACK_TOP-p);
- __kmap_atomic(current->thread.stack_page[p], KM_VSTACK_TOP-p);
- }
-#endif
- current->thread_info->real_stack = (void *)current->thread_info;
- current->thread_info->user_pgd = NULL;
- current->thread.esp0 = (unsigned long)current->thread_info->real_stack + THREAD_SIZE;
-}
-
-
-
-void __init entry_trampoline_setup(void)
-{
- /*
- * old IRQ entries set up by the boot code will still hang
- * around - they are a sign of hw trouble anyway, now they'll
- * produce a double fault message.
- */
- trap_init_virtual_GDT();
-}
+++ /dev/null
-/*
- * Written by: Garry Forsgren, Unisys Corporation
- * Natalie Protasevich, Unisys Corporation
- * This file contains the code to configure and interface
- * with Unisys ES7000 series hardware system manager.
- *
- * Copyright (c) 2003 Unisys Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Unisys Corporation, Township Line & Union Meeting
- * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
- *
- * http://www.unisys.com
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/smp.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <asm/io.h>
-#include <asm/nmi.h>
-#include <asm/smp.h>
-#include <asm/apicdef.h>
-#include "es7000.h"
-
-/*
- * ES7000 Globals
- */
-
-volatile unsigned long *psai = NULL;
-struct mip_reg *mip_reg;
-struct mip_reg *host_reg;
-int mip_port;
-unsigned long mip_addr, host_addr;
-extern int (*platform_rename_gsi)();
-
-static int __init
-es7000_rename_gsi(int ioapic, int gsi)
-{
- if (ioapic)
- return gsi;
- else {
- if (gsi == 0)
- return 13;
- if (gsi == 1)
- return 16;
- if (gsi == 4)
- return 17;
- if (gsi == 6)
- return 18;
- if (gsi == 7)
- return 19;
- if (gsi == 8)
- return 20;
- return gsi;
- }
-}
-
-/*
- * Parse the OEM Table
- */
-
-int __init
-parse_unisys_oem (char *oemptr, int oem_entries)
-{
- int i;
- int success = 0;
- unsigned char type, size;
- unsigned long val;
- char *tp = NULL;
- struct psai *psaip = NULL;
- struct mip_reg_info *mi;
- struct mip_reg *host, *mip;
-
- tp = oemptr;
-
- tp += 8;
-
- for (i=0; i <= oem_entries; i++) {
- type = *tp++;
- size = *tp++;
- tp -= 2;
- switch (type) {
- case MIP_REG:
- mi = (struct mip_reg_info *)tp;
- val = MIP_RD_LO(mi->host_reg);
- host_addr = val;
- host = (struct mip_reg *)val;
- host_reg = __va(host);
- val = MIP_RD_LO(mi->mip_reg);
- mip_port = MIP_PORT(mi->mip_info);
- mip_addr = val;
- mip = (struct mip_reg *)val;
- mip_reg = __va(mip);
- Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
- (unsigned long)host_reg);
- Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
- (unsigned long)mip_reg);
- success++;
- break;
- case MIP_PSAI_REG:
- psaip = (struct psai *)tp;
- if (tp != NULL) {
- if (psaip->addr)
- psai = __va(psaip->addr);
- else
- psai = NULL;
- success++;
- }
- break;
- default:
- break;
- }
- if (i == 6) break;
- tp += size;
- }
-
- if (success < 2) {
- printk("\nNo ES7000 found.\n");
- es7000_plat = 0;
- } else {
- printk("\nEnabling ES7000 specific features...\n");
- es7000_plat = 1;
- platform_rename_gsi = es7000_rename_gsi;
- }
- return es7000_plat;
-}
-
-int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length)
-{
- struct acpi_table_rsdp *rsdp = NULL;
- unsigned long rsdp_phys = 0;
- struct acpi_table_header *header = NULL;
- int i;
- struct acpi_table_sdt sdt;
-
- rsdp_phys = acpi_find_rsdp();
- rsdp = __va(rsdp_phys);
- if (rsdp->rsdt_address) {
- struct acpi_table_rsdt *mapped_rsdt = NULL;
- sdt.pa = rsdp->rsdt_address;
-
- header = (struct acpi_table_header *)
- __acpi_map_table(sdt.pa, sizeof(struct acpi_table_header));
- if (!header)
- return -ENODEV;
-
- sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3;
- mapped_rsdt = (struct acpi_table_rsdt *)
- __acpi_map_table(sdt.pa, header->length);
- if (!mapped_rsdt)
- return -ENODEV;
-
- header = &mapped_rsdt->header;
-
- for (i = 0; i < sdt.count; i++)
- sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
- };
- for (i = 0; i < sdt.count; i++) {
-
- header = (struct acpi_table_header *)
- __acpi_map_table(sdt.entry[i].pa,
- sizeof(struct acpi_table_header));
- if (!header)
- continue;
- if (!strncmp((char *) &header->signature, "OEM1", 4)) {
- if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) {
- void *addr;
- struct oem_table *t;
- acpi_table_print(header, sdt.entry[i].pa);
- t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
- addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
- *length = header->length;
- *oem_addr = (unsigned long) addr;
- return 0;
- }
- }
- }
- printk("ES7000: did not find Unisys ACPI OEM table!\n");
- return -1;
-}
-
-static void
-es7000_spin(int n)
-{
- int i = 0;
-
- while (i++ < n)
- rep_nop();
-}
-
-static int __init
-es7000_mip_write(struct mip_reg *mip_reg)
-{
- int status = 0;
- int spin;
-
- spin = MIP_SPIN;
- while (((unsigned long long)host_reg->off_38 &
- (unsigned long long)MIP_VALID) != 0) {
- if (--spin <= 0) {
- printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
- return -1;
- }
- es7000_spin(MIP_SPIN);
- }
-
- memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
- outb(1, mip_port);
-
- spin = MIP_SPIN;
-
- while (((unsigned long long)mip_reg->off_38 &
- (unsigned long long)MIP_VALID) == 0) {
- if (--spin <= 0) {
- printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
- return -1;
- }
- es7000_spin(MIP_SPIN);
- }
-
- status = ((unsigned long long)mip_reg->off_0 &
- (unsigned long long)0xffff0000000000) >> 48;
- mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
- (unsigned long long)~MIP_VALID);
- return status;
-}
-
-int
-es7000_start_cpu(int cpu, unsigned long eip)
-{
- unsigned long vect = 0, psaival = 0;
-
- if (psai == NULL)
- return -1;
-
- vect = ((unsigned long)__pa(eip)/0x1000) << 16;
- psaival = (0x1000000 | vect | cpu);
-
- while (*psai & 0x1000000)
- ;
-
- *psai = psaival;
-
- return 0;
-
-}
-
-int
-es7000_stop_cpu(int cpu)
-{
- int startup;
-
- if (psai == NULL)
- return -1;
-
- startup= (0x1000000 | cpu);
-
- while ((*psai & 0xff00ffff) != startup)
- ;
-
- startup = (*psai & 0xff0000) >> 16;
- *psai &= 0xffffff;
-
- return 0;
-
-}
-
-void __init
-es7000_sw_apic()
-{
- if (es7000_plat) {
- int mip_status;
- struct mip_reg es7000_mip_reg;
-
- printk("ES7000: Enabling APIC mode.\n");
- memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
- es7000_mip_reg.off_0 = MIP_SW_APIC;
- es7000_mip_reg.off_38 = (MIP_VALID);
- while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
- printk("es7000_sw_apic: command failed, status = %x\n",
- mip_status);
- return;
- }
-}
+++ /dev/null
- .serialize.data
- .serialize.instruction
+++ /dev/null
-#
-# Automatically generated make config: don't edit
-#
-CONFIG_MMU=y
-CONFIG_RWSEM_XCHGADD_ALGORITHM=y
-CONFIG_HAVE_DEC_LOCK=y
-CONFIG_PPC=y
-CONFIG_PPC32=y
-CONFIG_GENERIC_NVRAM=y
-
-#
-# Code maturity level options
-#
-CONFIG_EXPERIMENTAL=y
-CONFIG_CLEAN_COMPILE=y
-# CONFIG_STANDALONE is not set
-CONFIG_BROKEN_ON_SMP=y
-
-#
-# General setup
-#
-CONFIG_SWAP=y
-CONFIG_SYSVIPC=y
-# CONFIG_BSD_PROCESS_ACCT is not set
-CONFIG_SYSCTL=y
-CONFIG_LOG_BUF_SHIFT=14
-# CONFIG_HOTPLUG is not set
-# CONFIG_IKCONFIG is not set
-CONFIG_EMBEDDED=y
-# CONFIG_KALLSYMS is not set
-CONFIG_FUTEX=y
-# CONFIG_EPOLL is not set
-CONFIG_IOSCHED_NOOP=y
-CONFIG_IOSCHED_AS=y
-CONFIG_IOSCHED_DEADLINE=y
-# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
-
-#
-# Loadable module support
-#
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-# CONFIG_MODULE_FORCE_UNLOAD is not set
-CONFIG_OBSOLETE_MODPARM=y
-# CONFIG_MODVERSIONS is not set
-CONFIG_KMOD=y
-
-#
-# Processor
-#
-# CONFIG_6xx is not set
-CONFIG_40x=y
-# CONFIG_44x is not set
-# CONFIG_POWER3 is not set
-# CONFIG_POWER4 is not set
-# CONFIG_8xx is not set
-# CONFIG_MATH_EMULATION is not set
-# CONFIG_CPU_FREQ is not set
-CONFIG_4xx=y
-
-#
-# IBM 4xx options
-#
-# CONFIG_ASH is not set
-CONFIG_BUBINGA=y
-# CONFIG_CPCI405 is not set
-# CONFIG_EP405 is not set
-# CONFIG_OAK is not set
-# CONFIG_REDWOOD_5 is not set
-# CONFIG_REDWOOD_6 is not set
-# CONFIG_SYCAMORE is not set
-# CONFIG_WALNUT is not set
-CONFIG_IBM405_ERR77=y
-CONFIG_IBM405_ERR51=y
-CONFIG_IBM_OCP=y
-CONFIG_BIOS_FIXUP=y
-CONFIG_405EP=y
-CONFIG_IBM_OPENBIOS=y
-# CONFIG_PM is not set
-CONFIG_UART0_TTYS0=y
-# CONFIG_UART0_TTYS1 is not set
-CONFIG_NOT_COHERENT_CACHE=y
-
-#
-# Platform options
-#
-# CONFIG_PC_KEYBOARD is not set
-# CONFIG_SMP is not set
-# CONFIG_PREEMPT is not set
-# CONFIG_HIGHMEM is not set
-CONFIG_KERNEL_ELF=y
-CONFIG_BINFMT_ELF=y
-# CONFIG_BINFMT_MISC is not set
-# CONFIG_CMDLINE_BOOL is not set
-
-#
-# Bus options
-#
-CONFIG_PCI=y
-CONFIG_PCI_DOMAINS=y
-CONFIG_PCI_LEGACY_PROC=y
-# CONFIG_PCI_NAMES is not set
-
-#
-# Advanced setup
-#
-# CONFIG_ADVANCED_OPTIONS is not set
-
-#
-# Default settings for advanced configuration options are used
-#
-CONFIG_HIGHMEM_START=0xfe000000
-CONFIG_LOWMEM_SIZE=0x30000000
-CONFIG_KERNEL_START=0xc0000000
-CONFIG_TASK_SIZE=0x80000000
-CONFIG_BOOT_LOAD=0x00400000
-
-#
-# Device Drivers
-#
-
-#
-# Generic Driver Options
-#
-
-#
-# Memory Technology Devices (MTD)
-#
-# CONFIG_MTD is not set
-
-#
-# Parallel port support
-#
-# CONFIG_PARPORT is not set
-
-#
-# Plug and Play support
-#
-
-#
-# Block devices
-#
-# CONFIG_BLK_DEV_FD is not set
-# CONFIG_BLK_CPQ_DA is not set
-# CONFIG_BLK_CPQ_CISS_DA is not set
-# CONFIG_BLK_DEV_DAC960 is not set
-# CONFIG_BLK_DEV_UMEM is not set
-CONFIG_BLK_DEV_LOOP=y
-# CONFIG_BLK_DEV_CRYPTOLOOP is not set
-# CONFIG_BLK_DEV_NBD is not set
-# CONFIG_BLK_DEV_CARMEL is not set
-CONFIG_BLK_DEV_RAM=y
-CONFIG_BLK_DEV_RAM_SIZE=4096
-CONFIG_BLK_DEV_INITRD=y
-# CONFIG_LBD is not set
-
-#
-# ATA/ATAPI/MFM/RLL support
-#
-# CONFIG_IDE is not set
-
-#
-# SCSI device support
-#
-# CONFIG_SCSI is not set
-
-#
-# Multi-device support (RAID and LVM)
-#
-# CONFIG_MD is not set
-
-#
-# Fusion MPT device support
-#
-# CONFIG_FUSION is not set
-
-#
-# IEEE 1394 (FireWire) support
-#
-# CONFIG_IEEE1394 is not set
-
-#
-# I2O device support
-#
-# CONFIG_I2O is not set
-
-#
-# Macintosh device drivers
-#
-
-#
-# Networking support
-#
-CONFIG_NET=y
-
-#
-# Networking options
-#
-# CONFIG_PACKET is not set
-# CONFIG_NETLINK_DEV is not set
-CONFIG_UNIX=y
-# CONFIG_NET_KEY is not set
-CONFIG_INET=y
-CONFIG_IP_MULTICAST=y
-# CONFIG_IP_ADVANCED_ROUTER is not set
-CONFIG_IP_PNP=y
-# CONFIG_IP_PNP_DHCP is not set
-CONFIG_IP_PNP_BOOTP=y
-# CONFIG_IP_PNP_RARP is not set
-# CONFIG_NET_IPIP is not set
-# CONFIG_NET_IPGRE is not set
-# CONFIG_IP_MROUTE is not set
-# CONFIG_ARPD is not set
-CONFIG_SYN_COOKIES=y
-# CONFIG_INET_AH is not set
-# CONFIG_INET_ESP is not set
-# CONFIG_INET_IPCOMP is not set
-# CONFIG_IPV6 is not set
-# CONFIG_DECNET is not set
-# CONFIG_BRIDGE is not set
-# CONFIG_NETFILTER is not set
-
-#
-# SCTP Configuration (EXPERIMENTAL)
-#
-# CONFIG_IP_SCTP is not set
-# CONFIG_ATM is not set
-# CONFIG_VLAN_8021Q is not set
-# CONFIG_LLC2 is not set
-# CONFIG_IPX is not set
-# CONFIG_ATALK is not set
-# CONFIG_X25 is not set
-# CONFIG_LAPB is not set
-# CONFIG_NET_DIVERT is not set
-# CONFIG_ECONET is not set
-# CONFIG_WAN_ROUTER is not set
-# CONFIG_NET_FASTROUTE is not set
-# CONFIG_NET_HW_FLOWCONTROL is not set
-
-#
-# QoS and/or fair queueing
-#
-# CONFIG_NET_SCHED is not set
-
-#
-# Network testing
-#
-# CONFIG_NET_PKTGEN is not set
-CONFIG_NETDEVICES=y
-
-#
-# ARCnet devices
-#
-# CONFIG_ARCNET is not set
-# CONFIG_DUMMY is not set
-# CONFIG_BONDING is not set
-# CONFIG_EQUALIZER is not set
-# CONFIG_TUN is not set
-
-#
-# Ethernet (10 or 100Mbit)
-#
-CONFIG_NET_ETHERNET=y
-CONFIG_MII=y
-# CONFIG_OAKNET is not set
-# CONFIG_HAPPYMEAL is not set
-# CONFIG_SUNGEM is not set
-# CONFIG_NET_VENDOR_3COM is not set
-
-#
-# Tulip family network device support
-#
-# CONFIG_NET_TULIP is not set
-# CONFIG_HP100 is not set
-# CONFIG_NET_PCI is not set
-
-#
-# Ethernet (1000 Mbit)
-#
-# CONFIG_ACENIC is not set
-# CONFIG_DL2K is not set
-# CONFIG_E1000 is not set
-# CONFIG_NS83820 is not set
-# CONFIG_HAMACHI is not set
-# CONFIG_YELLOWFIN is not set
-# CONFIG_R8169 is not set
-# CONFIG_SIS190 is not set
-# CONFIG_SK98LIN is not set
-# CONFIG_TIGON3 is not set
-
-#
-# Ethernet (10000 Mbit)
-#
-# CONFIG_IXGB is not set
-CONFIG_IBM_EMAC=y
-# CONFIG_IBM_EMAC_ERRMSG is not set
-CONFIG_IBM_EMAC_RXB=64
-CONFIG_IBM_EMAC_TXB=8
-CONFIG_IBM_EMAC_FGAP=8
-CONFIG_IBM_EMAC_SKBRES=0
-# CONFIG_FDDI is not set
-# CONFIG_HIPPI is not set
-# CONFIG_PPP is not set
-# CONFIG_SLIP is not set
-
-#
-# Wireless LAN (non-hamradio)
-#
-# CONFIG_NET_RADIO is not set
-
-#
-# Token Ring devices
-#
-# CONFIG_TR is not set
-# CONFIG_RCPCI is not set
-# CONFIG_SHAPER is not set
-# CONFIG_NETCONSOLE is not set
-
-#
-# Wan interfaces
-#
-# CONFIG_WAN is not set
-
-#
-# Amateur Radio support
-#
-# CONFIG_HAMRADIO is not set
-
-#
-# IrDA (infrared) support
-#
-# CONFIG_IRDA is not set
-
-#
-# Bluetooth support
-#
-# CONFIG_BT is not set
-# CONFIG_NETPOLL is not set
-# CONFIG_NET_POLL_CONTROLLER is not set
-
-#
-# ISDN subsystem
-#
-# CONFIG_ISDN is not set
-
-#
-# Telephony Support
-#
-# CONFIG_PHONE is not set
-
-#
-# Input device support
-#
-CONFIG_INPUT=y
-
-#
-# Userland interfaces
-#
-# CONFIG_INPUT_MOUSEDEV is not set
-# CONFIG_INPUT_JOYDEV is not set
-# CONFIG_INPUT_TSDEV is not set
-# CONFIG_INPUT_EVDEV is not set
-# CONFIG_INPUT_EVBUG is not set
-
-#
-# Input I/O drivers
-#
-# CONFIG_GAMEPORT is not set
-CONFIG_SOUND_GAMEPORT=y
-CONFIG_SERIO=y
-# CONFIG_SERIO_I8042 is not set
-# CONFIG_SERIO_SERPORT is not set
-# CONFIG_SERIO_CT82C710 is not set
-# CONFIG_SERIO_PCIPS2 is not set
-
-#
-# Input Device Drivers
-#
-# CONFIG_INPUT_KEYBOARD is not set
-# CONFIG_INPUT_MOUSE is not set
-# CONFIG_INPUT_JOYSTICK is not set
-# CONFIG_INPUT_TOUCHSCREEN is not set
-# CONFIG_INPUT_MISC is not set
-
-#
-# Character devices
-#
-# CONFIG_VT is not set
-# CONFIG_SERIAL_NONSTANDARD is not set
-
-#
-# Serial drivers
-#
-CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_SERIAL_8250_NR_UARTS=4
-# CONFIG_SERIAL_8250_EXTENDED is not set
-
-#
-# Non-8250 serial port support
-#
-CONFIG_SERIAL_CORE=y
-CONFIG_SERIAL_CORE_CONSOLE=y
-CONFIG_UNIX98_PTYS=y
-CONFIG_LEGACY_PTYS=y
-CONFIG_LEGACY_PTY_COUNT=256
-# CONFIG_QIC02_TAPE is not set
-
-#
-# IPMI
-#
-# CONFIG_IPMI_HANDLER is not set
-
-#
-# Watchdog Cards
-#
-# CONFIG_WATCHDOG is not set
-# CONFIG_NVRAM is not set
-# CONFIG_GEN_RTC is not set
-# CONFIG_DTLK is not set
-# CONFIG_R3964 is not set
-# CONFIG_APPLICOM is not set
-
-#
-# Ftape, the floppy tape device driver
-#
-# CONFIG_FTAPE is not set
-# CONFIG_AGP is not set
-# CONFIG_DRM is not set
-# CONFIG_RAW_DRIVER is not set
-
-#
-# I2C support
-#
-# CONFIG_I2C is not set
-
-#
-# Misc devices
-#
-
-#
-# Multimedia devices
-#
-# CONFIG_VIDEO_DEV is not set
-
-#
-# Digital Video Broadcasting Devices
-#
-# CONFIG_DVB is not set
-
-#
-# Graphics support
-#
-# CONFIG_FB is not set
-
-#
-# Sound
-#
-# CONFIG_SOUND is not set
-
-#
-# USB support
-#
-# CONFIG_USB is not set
-
-#
-# USB Gadget Support
-#
-# CONFIG_USB_GADGET is not set
-
-#
-# File systems
-#
-CONFIG_EXT2_FS=y
-# CONFIG_EXT2_FS_XATTR is not set
-# CONFIG_EXT3_FS is not set
-# CONFIG_JBD is not set
-# CONFIG_REISERFS_FS is not set
-# CONFIG_JFS_FS is not set
-# CONFIG_XFS_FS is not set
-# CONFIG_MINIX_FS is not set
-# CONFIG_ROMFS_FS is not set
-# CONFIG_QUOTA is not set
-# CONFIG_AUTOFS_FS is not set
-# CONFIG_AUTOFS4_FS is not set
-
-#
-# CD-ROM/DVD Filesystems
-#
-# CONFIG_ISO9660_FS is not set
-# CONFIG_UDF_FS is not set
-
-#
-# DOS/FAT/NT Filesystems
-#
-# CONFIG_FAT_FS is not set
-# CONFIG_NTFS_FS is not set
-
-#
-# Pseudo filesystems
-#
-CONFIG_PROC_FS=y
-CONFIG_PROC_KCORE=y
-# CONFIG_DEVFS_FS is not set
-# CONFIG_DEVPTS_FS_XATTR is not set
-CONFIG_TMPFS=y
-# CONFIG_HUGETLB_PAGE is not set
-CONFIG_RAMFS=y
-
-#
-# Miscellaneous filesystems
-#
-# CONFIG_ADFS_FS is not set
-# CONFIG_AFFS_FS is not set
-# CONFIG_HFS_FS is not set
-# CONFIG_HFSPLUS_FS is not set
-# CONFIG_BEFS_FS is not set
-# CONFIG_BFS_FS is not set
-# CONFIG_EFS_FS is not set
-# CONFIG_CRAMFS is not set
-# CONFIG_VXFS_FS is not set
-# CONFIG_HPFS_FS is not set
-# CONFIG_QNX4FS_FS is not set
-# CONFIG_SYSV_FS is not set
-# CONFIG_UFS_FS is not set
-
-#
-# Network File Systems
-#
-CONFIG_NFS_FS=y
-# CONFIG_NFS_V3 is not set
-# CONFIG_NFS_V4 is not set
-# CONFIG_NFS_DIRECTIO is not set
-# CONFIG_NFSD is not set
-CONFIG_ROOT_NFS=y
-CONFIG_LOCKD=y
-# CONFIG_EXPORTFS is not set
-CONFIG_SUNRPC=y
-# CONFIG_RPCSEC_GSS_KRB5 is not set
-# CONFIG_SMB_FS is not set
-# CONFIG_CIFS is not set
-# CONFIG_NCP_FS is not set
-# CONFIG_CODA_FS is not set
-# CONFIG_INTERMEZZO_FS is not set
-# CONFIG_AFS_FS is not set
-
-#
-# Partition Types
-#
-CONFIG_PARTITION_ADVANCED=y
-# CONFIG_ACORN_PARTITION is not set
-# CONFIG_OSF_PARTITION is not set
-# CONFIG_AMIGA_PARTITION is not set
-# CONFIG_ATARI_PARTITION is not set
-# CONFIG_MAC_PARTITION is not set
-# CONFIG_MSDOS_PARTITION is not set
-# CONFIG_LDM_PARTITION is not set
-# CONFIG_NEC98_PARTITION is not set
-# CONFIG_SGI_PARTITION is not set
-# CONFIG_ULTRIX_PARTITION is not set
-# CONFIG_SUN_PARTITION is not set
-# CONFIG_EFI_PARTITION is not set
-
-#
-# Native Language Support
-#
-# CONFIG_NLS is not set
-
-#
-# IBM 40x options
-#
-
-#
-# Library routines
-#
-CONFIG_CRC32=y
-
-#
-# Kernel hacking
-#
-# CONFIG_DEBUG_KERNEL is not set
-# CONFIG_SERIAL_TEXT_DEBUG is not set
-CONFIG_PPC_OCP=y
-
-#
-# Security options
-#
-# CONFIG_SECURITY is not set
-
-#
-# Cryptographic options
-#
-# CONFIG_CRYPTO is not set
+++ /dev/null
-#include <linux/module.h>
-#include <asm/ocp.h>
-
-struct ocp_sys_info_data ocp_sys_info = {
- .opb_bus_freq = 50000000, /* OPB Bus Frequency (Hz) */
- .ebc_bus_freq = 33333333, /* EBC Bus Frequency (Hz) */
-};
-
-EXPORT_SYMBOL(ocp_sys_info);
+++ /dev/null
-#ifndef __COW_H__
-#define __COW_H__
-
-#include <asm/types.h>
-
-#if __BYTE_ORDER == __BIG_ENDIAN
-# define ntohll(x) (x)
-# define htonll(x) (x)
-#elif __BYTE_ORDER == __LITTLE_ENDIAN
-# define ntohll(x) bswap_64(x)
-# define htonll(x) bswap_64(x)
-#else
-#error "__BYTE_ORDER not defined"
-#endif
-
-extern int init_cow_file(int fd, char *cow_file, char *backing_file,
- int sectorsize, int alignment, int *bitmap_offset_out,
- unsigned long *bitmap_len_out, int *data_offset_out);
-
-extern int file_reader(__u64 offset, char *buf, int len, void *arg);
-extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
- void *arg, __u32 *version_out,
- char **backing_file_out, time_t *mtime_out,
- __u64 *size_out, int *sectorsize_out,
- __u32 *align_out, int *bitmap_offset_out);
-
-extern int write_cow_header(char *cow_file, int fd, char *backing_file,
- int sectorsize, int alignment, long long *size);
-
-extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
- int bitmap_offset, unsigned long *bitmap_len_out,
- int *data_offset_out);
-
-#endif
-
-/*
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-#include <stddef.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <byteswap.h>
-#include <sys/time.h>
-#include <sys/param.h>
-#include <sys/user.h>
-#include <netinet/in.h>
-
-#include "os.h"
-
-#include "cow.h"
-#include "cow_sys.h"
-
-#define PATH_LEN_V1 256
-
-struct cow_header_v1 {
- int magic;
- int version;
- char backing_file[PATH_LEN_V1];
- time_t mtime;
- __u64 size;
- int sectorsize;
-};
-
-#define PATH_LEN_V2 MAXPATHLEN
-
-struct cow_header_v2 {
- unsigned long magic;
- unsigned long version;
- char backing_file[PATH_LEN_V2];
- time_t mtime;
- __u64 size;
- int sectorsize;
-};
-
-/* Define PATH_LEN_V3 as the usual value of MAXPATHLEN, just hard-code it in
- * case other systems have different values for MAXPATHLEN
- */
-#define PATH_LEN_V3 4096
-
-/* Changes from V2 -
- * PATH_LEN_V3 as described above
- * Explicitly specify field bit lengths for systems with different
- * lengths for the usual C types. Not sure whether char or
- * time_t should be changed, this can be changed later without
- * breaking compatibility
- * Add alignment field so that different alignments can be used for the
- * bitmap and data
- * Add cow_format field to allow for the possibility of different ways
- * of specifying the COW blocks. For now, the only value is 0,
- * for the traditional COW bitmap.
- * Move the backing_file field to the end of the header. This allows
- * for the possibility of expanding it into the padding required
- * by the bitmap alignment.
- * The bitmap and data portions of the file will be aligned as specified
- * by the alignment field. This is to allow COW files to be
- * put on devices with restrictions on access alignments, such as
- * /dev/raw, with a 512 byte alignment restriction. This also
- * allows the data to be more aligned more strictly than on
- * sector boundaries. This is needed for ubd-mmap, which needs
- * the data to be page aligned.
- * Fixed (finally!) the rounding bug
- */
-
-struct cow_header_v3 {
- __u32 magic;
- __u32 version;
- time_t mtime;
- __u64 size;
- __u32 sectorsize;
- __u32 alignment;
- __u32 cow_format;
- char backing_file[PATH_LEN_V3];
-};
-
-/* COW format definitions - for now, we have only the usual COW bitmap */
-#define COW_BITMAP 0
-
-union cow_header {
- struct cow_header_v1 v1;
- struct cow_header_v2 v2;
- struct cow_header_v3 v3;
-};
-
-#define COW_MAGIC 0x4f4f4f4d /* MOOO */
-#define COW_VERSION 3
-
-#define DIV_ROUND(x, len) (((x) + (len) - 1) / (len))
-#define ROUND_UP(x, align) DIV_ROUND(x, align) * (align)
-
-void cow_sizes(int version, __u64 size, int sectorsize, int align,
- int bitmap_offset, unsigned long *bitmap_len_out,
- int *data_offset_out)
-{
- if(version < 3){
- *bitmap_len_out = (size + sectorsize - 1) / (8 * sectorsize);
-
- *data_offset_out = bitmap_offset + *bitmap_len_out;
- *data_offset_out = (*data_offset_out + sectorsize - 1) /
- sectorsize;
- *data_offset_out *= sectorsize;
- }
- else {
- *bitmap_len_out = DIV_ROUND(size, sectorsize);
- *bitmap_len_out = DIV_ROUND(*bitmap_len_out, 8);
-
- *data_offset_out = bitmap_offset + *bitmap_len_out;
- *data_offset_out = ROUND_UP(*data_offset_out, align);
- }
-}
-
-static int absolutize(char *to, int size, char *from)
-{
- char save_cwd[256], *slash;
- int remaining;
-
- if(getcwd(save_cwd, sizeof(save_cwd)) == NULL) {
- cow_printf("absolutize : unable to get cwd - errno = %d\n",
- errno);
- return(-1);
- }
- slash = strrchr(from, '/');
- if(slash != NULL){
- *slash = '\0';
- if(chdir(from)){
- *slash = '/';
- cow_printf("absolutize : Can't cd to '%s' - "
- "errno = %d\n", from, errno);
- return(-1);
- }
- *slash = '/';
- if(getcwd(to, size) == NULL){
- cow_printf("absolutize : unable to get cwd of '%s' - "
- "errno = %d\n", from, errno);
- return(-1);
- }
- remaining = size - strlen(to);
- if(strlen(slash) + 1 > remaining){
- cow_printf("absolutize : unable to fit '%s' into %d "
- "chars\n", from, size);
- return(-1);
- }
- strcat(to, slash);
- }
- else {
- if(strlen(save_cwd) + 1 + strlen(from) + 1 > size){
- cow_printf("absolutize : unable to fit '%s' into %d "
- "chars\n", from, size);
- return(-1);
- }
- strcpy(to, save_cwd);
- strcat(to, "/");
- strcat(to, from);
- }
- chdir(save_cwd);
- return(0);
-}
-
-int write_cow_header(char *cow_file, int fd, char *backing_file,
- int sectorsize, int alignment, long long *size)
-{
- struct cow_header_v3 *header;
- unsigned long modtime;
- int err;
-
- err = cow_seek_file(fd, 0);
- if(err < 0){
- cow_printf("write_cow_header - lseek failed, err = %d\n", -err);
- goto out;
- }
-
- err = -ENOMEM;
- header = cow_malloc(sizeof(*header));
- if(header == NULL){
- cow_printf("Failed to allocate COW V3 header\n");
- goto out;
- }
- header->magic = htonl(COW_MAGIC);
- header->version = htonl(COW_VERSION);
-
- err = -EINVAL;
- if(strlen(backing_file) > sizeof(header->backing_file) - 1){
- cow_printf("Backing file name \"%s\" is too long - names are "
- "limited to %d characters\n", backing_file,
- sizeof(header->backing_file) - 1);
- goto out_free;
- }
-
- if(absolutize(header->backing_file, sizeof(header->backing_file),
- backing_file))
- goto out_free;
-
- err = os_file_modtime(header->backing_file, &modtime);
- if(err < 0){
- cow_printf("Backing file '%s' mtime request failed, "
- "err = %d\n", header->backing_file, -err);
- goto out_free;
- }
-
- err = cow_file_size(header->backing_file, size);
- if(err < 0){
- cow_printf("Couldn't get size of backing file '%s', "
- "err = %d\n", header->backing_file, -err);
- goto out_free;
- }
-
- header->mtime = htonl(modtime);
- header->size = htonll(*size);
- header->sectorsize = htonl(sectorsize);
- header->alignment = htonl(alignment);
- header->cow_format = COW_BITMAP;
-
- err = os_write_file(fd, header, sizeof(*header));
- if(err != sizeof(*header)){
- cow_printf("Write of header to new COW file '%s' failed, "
- "err = %d\n", cow_file, -err);
- goto out_free;
- }
- err = 0;
- out_free:
- cow_free(header);
- out:
- return(err);
-}
-
-int file_reader(__u64 offset, char *buf, int len, void *arg)
-{
- int fd = *((int *) arg);
-
- return(pread(fd, buf, len, offset));
-}
-
-/* XXX Need to sanity-check the values read from the header */
-
-int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
- __u32 *version_out, char **backing_file_out,
- time_t *mtime_out, __u64 *size_out,
- int *sectorsize_out, __u32 *align_out,
- int *bitmap_offset_out)
-{
- union cow_header *header;
- char *file;
- int err, n;
- unsigned long version, magic;
-
- header = cow_malloc(sizeof(*header));
- if(header == NULL){
- cow_printf("read_cow_header - Failed to allocate header\n");
- return(-ENOMEM);
- }
- err = -EINVAL;
- n = (*reader)(0, (char *) header, sizeof(*header), arg);
- if(n < offsetof(typeof(header->v1), backing_file)){
- cow_printf("read_cow_header - short header\n");
- goto out;
- }
-
- magic = header->v1.magic;
- if(magic == COW_MAGIC) {
- version = header->v1.version;
- }
- else if(magic == ntohl(COW_MAGIC)){
- version = ntohl(header->v1.version);
- }
- /* No error printed because the non-COW case comes through here */
- else goto out;
-
- *version_out = version;
-
- if(version == 1){
- if(n < sizeof(header->v1)){
- cow_printf("read_cow_header - failed to read V1 "
- "header\n");
- goto out;
- }
- *mtime_out = header->v1.mtime;
- *size_out = header->v1.size;
- *sectorsize_out = header->v1.sectorsize;
- *bitmap_offset_out = sizeof(header->v1);
- *align_out = *sectorsize_out;
- file = header->v1.backing_file;
- }
- else if(version == 2){
- if(n < sizeof(header->v2)){
- cow_printf("read_cow_header - failed to read V2 "
- "header\n");
- goto out;
- }
- *mtime_out = ntohl(header->v2.mtime);
- *size_out = ntohll(header->v2.size);
- *sectorsize_out = ntohl(header->v2.sectorsize);
- *bitmap_offset_out = sizeof(header->v2);
- *align_out = *sectorsize_out;
- file = header->v2.backing_file;
- }
- else if(version == 3){
- if(n < sizeof(header->v3)){
- cow_printf("read_cow_header - failed to read V2 "
- "header\n");
- goto out;
- }
- *mtime_out = ntohl(header->v3.mtime);
- *size_out = ntohll(header->v3.size);
- *sectorsize_out = ntohl(header->v3.sectorsize);
- *align_out = ntohl(header->v3.alignment);
- *bitmap_offset_out = ROUND_UP(sizeof(header->v3), *align_out);
- file = header->v3.backing_file;
- }
- else {
- cow_printf("read_cow_header - invalid COW version\n");
- goto out;
- }
- err = -ENOMEM;
- *backing_file_out = cow_strdup(file);
- if(*backing_file_out == NULL){
- cow_printf("read_cow_header - failed to allocate backing "
- "file\n");
- goto out;
- }
- err = 0;
- out:
- cow_free(header);
- return(err);
-}
-
-int init_cow_file(int fd, char *cow_file, char *backing_file, int sectorsize,
- int alignment, int *bitmap_offset_out,
- unsigned long *bitmap_len_out, int *data_offset_out)
-{
- __u64 size, offset;
- char zero = 0;
- int err;
-
- err = write_cow_header(cow_file, fd, backing_file, sectorsize,
- alignment, &size);
- if(err)
- goto out;
-
- *bitmap_offset_out = ROUND_UP(sizeof(struct cow_header_v3), alignment);
- cow_sizes(COW_VERSION, size, sectorsize, alignment, *bitmap_offset_out,
- bitmap_len_out, data_offset_out);
-
- offset = *data_offset_out + size - sizeof(zero);
- err = cow_seek_file(fd, offset);
- if(err < 0){
- cow_printf("cow bitmap lseek failed : err = %d\n", -err);
- goto out;
- }
-
- /* does not really matter how much we write it is just to set EOF
- * this also sets the entire COW bitmap
- * to zero without having to allocate it
- */
- err = cow_write_file(fd, &zero, sizeof(zero));
- if(err != sizeof(zero)){
- cow_printf("Write of bitmap to new COW file '%s' failed, "
- "err = %d\n", cow_file, -err);
- err = -EINVAL;
- goto out;
- }
-
- return(0);
-
- out:
- return(err);
-}
-
-/*
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __IRQ_KERN_H__
-#define __IRQ_KERN_H__
-
-#include "linux/interrupt.h"
-
-extern int um_request_irq(unsigned int irq, int fd, int type,
- irqreturn_t (*handler)(int, void *,
- struct pt_regs *),
- unsigned long irqflags, const char * devname,
- void *dev_id);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#ifndef __MEM_KERN_H__
-#define __MEM_KERN_H__
-
-#include "linux/list.h"
-#include "linux/types.h"
-
-struct remapper {
- struct list_head list;
- int (*proc)(int, unsigned long, int, __u64);
-};
-
-extern void register_remapper(struct remapper *info);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/mm.h"
-#include "linux/ghash.h"
-#include "linux/slab.h"
-#include "linux/vmalloc.h"
-#include "linux/bootmem.h"
-#include "asm/types.h"
-#include "asm/pgtable.h"
-#include "kern_util.h"
-#include "user_util.h"
-#include "mode_kern.h"
-#include "mem.h"
-#include "mem_user.h"
-#include "os.h"
-#include "kern.h"
-#include "init.h"
-
-#if 0
-static pgd_t physmem_pgd[PTRS_PER_PGD];
-
-static struct phys_desc *lookup_mapping(void *addr)
-{
- pgd = &physmem_pgd[pgd_index(addr)];
- if(pgd_none(pgd))
- return(NULL);
-
- pmd = pmd_offset(pgd, addr);
- if(pmd_none(pmd))
- return(NULL);
-
- pte = pte_offset_kernel(pmd, addr);
- return((struct phys_desc *) pte_val(pte));
-}
-
-static struct add_mapping(void *addr, struct phys_desc *new)
-{
-}
-#endif
-
-#define PHYS_HASHSIZE (8192)
-
-struct phys_desc;
-
-DEF_HASH_STRUCTS(virtmem, PHYS_HASHSIZE, struct phys_desc);
-
-struct phys_desc {
- struct virtmem_ptrs virt_ptrs;
- int fd;
- __u64 offset;
- void *virt;
- unsigned long phys;
- struct list_head list;
-};
-
-struct virtmem_table virtmem_hash;
-
-static int virt_cmp(void *virt1, void *virt2)
-{
- return(virt1 != virt2);
-}
-
-static int virt_hash(void *virt)
-{
- unsigned long addr = ((unsigned long) virt) >> PAGE_SHIFT;
- return(addr % PHYS_HASHSIZE);
-}
-
-DEF_HASH(static, virtmem, struct phys_desc, virt_ptrs, void *, virt, virt_cmp,
- virt_hash);
-
-LIST_HEAD(descriptor_mappings);
-
-struct desc_mapping {
- int fd;
- struct list_head list;
- struct list_head pages;
-};
-
-static struct desc_mapping *find_mapping(int fd)
-{
- struct desc_mapping *desc;
- struct list_head *ele;
-
- list_for_each(ele, &descriptor_mappings){
- desc = list_entry(ele, struct desc_mapping, list);
- if(desc->fd == fd)
- return(desc);
- }
-
- return(NULL);
-}
-
-static struct desc_mapping *descriptor_mapping(int fd)
-{
- struct desc_mapping *desc;
-
- desc = find_mapping(fd);
- if(desc != NULL)
- return(desc);
-
- desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
- if(desc == NULL)
- return(NULL);
-
- *desc = ((struct desc_mapping)
- { .fd = fd,
- .list = LIST_HEAD_INIT(desc->list),
- .pages = LIST_HEAD_INIT(desc->pages) });
- list_add(&desc->list, &descriptor_mappings);
-
- return(desc);
-}
-
-int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w)
-{
- struct desc_mapping *fd_maps;
- struct phys_desc *desc;
- unsigned long phys;
- int err;
-
- fd_maps = descriptor_mapping(fd);
- if(fd_maps == NULL)
- return(-ENOMEM);
-
- phys = __pa(virt);
- if(find_virtmem_hash(&virtmem_hash, virt) != NULL)
- panic("Address 0x%p is already substituted\n", virt);
-
- err = -ENOMEM;
- desc = kmalloc(sizeof(*desc), GFP_ATOMIC);
- if(desc == NULL)
- goto out;
-
- *desc = ((struct phys_desc)
- { .virt_ptrs = { NULL, NULL },
- .fd = fd,
- .offset = offset,
- .virt = virt,
- .phys = __pa(virt),
- .list = LIST_HEAD_INIT(desc->list) });
- insert_virtmem_hash(&virtmem_hash, desc);
-
- list_add(&desc->list, &fd_maps->pages);
-
- virt = (void *) ((unsigned long) virt & PAGE_MASK);
- err = os_map_memory(virt, fd, offset, PAGE_SIZE, 1, w, 0);
- if(!err)
- goto out;
-
- remove_virtmem_hash(&virtmem_hash, desc);
- kfree(desc);
- out:
- return(err);
-}
-
-static int physmem_fd = -1;
-
-static void remove_mapping(struct phys_desc *desc)
-{
- void *virt = desc->virt;
- int err;
-
- remove_virtmem_hash(&virtmem_hash, desc);
- list_del(&desc->list);
- kfree(desc);
-
- err = os_map_memory(virt, physmem_fd, __pa(virt), PAGE_SIZE, 1, 1, 0);
- if(err)
- panic("Failed to unmap block device page from physical memory, "
- "errno = %d", -err);
-}
-
-int physmem_remove_mapping(void *virt)
-{
- struct phys_desc *desc;
-
- virt = (void *) ((unsigned long) virt & PAGE_MASK);
- desc = find_virtmem_hash(&virtmem_hash, virt);
- if(desc == NULL)
- return(0);
-
- remove_mapping(desc);
- return(1);
-}
-
-void physmem_forget_descriptor(int fd)
-{
- struct desc_mapping *desc;
- struct phys_desc *page;
- struct list_head *ele, *next;
- __u64 offset;
- void *addr;
- int err;
-
- desc = find_mapping(fd);
- if(desc == NULL)
- return;
-
- list_for_each_safe(ele, next, &desc->pages){
- page = list_entry(ele, struct phys_desc, list);
- offset = page->offset;
- addr = page->virt;
- remove_mapping(page);
- err = os_seek_file(fd, offset);
- if(err)
- panic("physmem_forget_descriptor - failed to seek "
- "to %lld in fd %d, error = %d\n",
- offset, fd, -err);
- err = os_read_file(fd, addr, PAGE_SIZE);
- if(err < 0)
- panic("physmem_forget_descriptor - failed to read "
- "from fd %d to 0x%p, error = %d\n",
- fd, addr, -err);
- }
-
- list_del(&desc->list);
- kfree(desc);
-}
-
-void arch_free_page(struct page *page, int order)
-{
- void *virt;
- int i;
-
- for(i = 0; i < (1 << order); i++){
- virt = __va(page_to_phys(page + i));
- physmem_remove_mapping(virt);
- }
-}
-
-int is_remapped(void *virt)
-{
- return(find_virtmem_hash(&virtmem_hash, virt) != NULL);
-}
-
-/* Changed during early boot */
-unsigned long high_physmem;
-
-extern unsigned long physmem_size;
-
-void *to_virt(unsigned long phys)
-{
- return((void *) uml_physmem + phys);
-}
-
-unsigned long to_phys(void *virt)
-{
- return(((unsigned long) virt) - uml_physmem);
-}
-
-int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
-{
- struct page *p, *map;
- unsigned long phys_len, phys_pages, highmem_len, highmem_pages;
- unsigned long iomem_len, iomem_pages, total_len, total_pages;
- int i;
-
- phys_pages = physmem >> PAGE_SHIFT;
- phys_len = phys_pages * sizeof(struct page);
-
- iomem_pages = iomem >> PAGE_SHIFT;
- iomem_len = iomem_pages * sizeof(struct page);
-
- highmem_pages = highmem >> PAGE_SHIFT;
- highmem_len = highmem_pages * sizeof(struct page);
-
- total_pages = phys_pages + iomem_pages + highmem_pages;
- total_len = phys_len + iomem_pages + highmem_len;
-
- if(kmalloc_ok){
- map = kmalloc(total_len, GFP_KERNEL);
- if(map == NULL)
- map = vmalloc(total_len);
- }
- else map = alloc_bootmem_low_pages(total_len);
-
- if(map == NULL)
- return(-ENOMEM);
-
- for(i = 0; i < total_pages; i++){
- p = &map[i];
- set_page_count(p, 0);
- SetPageReserved(p);
- INIT_LIST_HEAD(&p->lru);
- }
-
- mem_map = map;
- max_mapnr = total_pages;
- return(0);
-}
-
-struct page *phys_to_page(const unsigned long phys)
-{
- return(&mem_map[phys >> PAGE_SHIFT]);
-}
-
-struct page *__virt_to_page(const unsigned long virt)
-{
- return(&mem_map[__pa(virt) >> PAGE_SHIFT]);
-}
-
-unsigned long page_to_phys(struct page *page)
-{
- return((page - mem_map) << PAGE_SHIFT);
-}
-
-pte_t mk_pte(struct page *page, pgprot_t pgprot)
-{
- pte_t pte;
-
- pte_val(pte) = page_to_phys(page) + pgprot_val(pgprot);
- if(pte_present(pte)) pte_mknewprot(pte_mknewpage(pte));
- return(pte);
-}
-
-/* Changed during early boot */
-static unsigned long kmem_top = 0;
-
-unsigned long get_kmem_end(void)
-{
- if(kmem_top == 0)
- kmem_top = CHOOSE_MODE(kmem_end_tt, kmem_end_skas);
- return(kmem_top);
-}
-
-void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
- int r, int w, int x)
-{
- __u64 offset;
- int fd, err;
-
- fd = phys_mapping(phys, &offset);
- err = os_map_memory((void *) virt, fd, offset, len, r, w, x);
- if(err)
- panic("map_memory(0x%lx, %d, 0x%llx, %ld, %d, %d, %d) failed, "
- "err = %d\n", virt, fd, offset, len, r, w, x, err);
-}
-
-#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
-
-void setup_physmem(unsigned long start, unsigned long reserve_end,
- unsigned long len, unsigned long highmem)
-{
- unsigned long reserve = reserve_end - start;
- int pfn = PFN_UP(__pa(reserve_end));
- int delta = (len - reserve) >> PAGE_SHIFT;
- int err, offset, bootmap_size;
-
- physmem_fd = create_mem_file(len + highmem);
-
- offset = uml_reserved - uml_physmem;
- err = os_map_memory((void *) uml_reserved, physmem_fd, offset,
- len - offset, 1, 1, 0);
- if(err < 0){
- os_print_error(err, "Mapping memory");
- exit(1);
- }
-
- bootmap_size = init_bootmem(pfn, pfn + delta);
- free_bootmem(__pa(reserve_end) + bootmap_size,
- len - bootmap_size - reserve);
-}
-
-int phys_mapping(unsigned long phys, __u64 *offset_out)
-{
- struct phys_desc *desc = find_virtmem_hash(&virtmem_hash,
- __va(phys & PAGE_MASK));
- int fd = -1;
-
- if(desc != NULL){
- fd = desc->fd;
- *offset_out = desc->offset;
- }
- else if(phys < physmem_size){
- fd = physmem_fd;
- *offset_out = phys;
- }
- else if(phys < __pa(end_iomem)){
- struct iomem_region *region = iomem_regions;
-
- while(region != NULL){
- if((phys >= region->phys) &&
- (phys < region->phys + region->size)){
- fd = region->fd;
- *offset_out = phys - region->phys;
- break;
- }
- region = region->next;
- }
- }
- else if(phys < __pa(end_iomem) + highmem){
- fd = physmem_fd;
- *offset_out = phys - iomem_size;
- }
-
- return(fd);
-}
-
-static int __init uml_mem_setup(char *line, int *add)
-{
- char *retptr;
- physmem_size = memparse(line,&retptr);
- return 0;
-}
-__uml_setup("mem=", uml_mem_setup,
-"mem=<Amount of desired ram>\n"
-" This controls how much \"physical\" memory the kernel allocates\n"
-" for the system. The size is specified as a number followed by\n"
-" one of 'k', 'K', 'm', 'M', which have the obvious meanings.\n"
-" This is not related to the amount of memory in the host. It can\n"
-" be more, and the excess, if it's ever used, will just be swapped out.\n"
-" Example: mem=64M\n\n"
-);
-
-unsigned long find_iomem(char *driver, unsigned long *len_out)
-{
- struct iomem_region *region = iomem_regions;
-
- while(region != NULL){
- if(!strcmp(region->driver, driver)){
- *len_out = region->size;
- return(region->virt);
- }
- }
-
- return(0);
-}
-
-int setup_iomem(void)
-{
- struct iomem_region *region = iomem_regions;
- unsigned long iomem_start = high_physmem + PAGE_SIZE;
- int err;
-
- while(region != NULL){
- err = os_map_memory((void *) iomem_start, region->fd, 0,
- region->size, 1, 1, 0);
- if(err)
- printk("Mapping iomem region for driver '%s' failed, "
- "errno = %d\n", region->driver, -err);
- else {
- region->virt = iomem_start;
- region->phys = __pa(region->virt);
- }
-
- iomem_start += region->size + PAGE_SIZE;
- region = region->next;
- }
-
- return(0);
-}
-
-__initcall(setup_iomem);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/stddef.h"
-#include "linux/kernel.h"
-#include "linux/string.h"
-#include "linux/fs.h"
-#include "linux/highmem.h"
-#include "asm/page.h"
-#include "asm/pgtable.h"
-#include "asm/uaccess.h"
-#include "kern_util.h"
-
-extern void *um_virt_to_phys(struct task_struct *task, unsigned long addr,
- pte_t *pte_out);
-
-static unsigned long maybe_map(unsigned long virt, int is_write)
-{
- pte_t pte;
- int err;
-
- void *phys = um_virt_to_phys(current, virt, &pte);
- int dummy_code;
-
- if(IS_ERR(phys) || (is_write && !pte_write(pte))){
- err = handle_page_fault(virt, 0, is_write, 0, &dummy_code);
- if(err)
- return(0);
- phys = um_virt_to_phys(current, virt, NULL);
- }
- return((unsigned long) phys);
-}
-
-static int do_op(unsigned long addr, int len, int is_write,
- int (*op)(unsigned long addr, int len, void *arg), void *arg)
-{
- struct page *page;
- int n;
-
- addr = maybe_map(addr, is_write);
- if(addr == -1)
- return(-1);
-
- page = phys_to_page(addr);
- addr = (unsigned long) kmap(page) + (addr & ~PAGE_MASK);
- n = (*op)(addr, len, arg);
- kunmap(page);
-
- return(n);
-}
-
-static int buffer_op(unsigned long addr, int len, int is_write,
- int (*op)(unsigned long addr, int len, void *arg),
- void *arg)
-{
- int size = min(PAGE_ALIGN(addr) - addr, (unsigned long) len);
- int remain = len, n;
-
- n = do_op(addr, size, is_write, op, arg);
- if(n != 0)
- return(n < 0 ? remain : 0);
-
- addr += size;
- remain -= size;
- if(remain == 0)
- return(0);
-
- while(addr < ((addr + remain) & PAGE_MASK)){
- n = do_op(addr, PAGE_SIZE, is_write, op, arg);
- if(n != 0)
- return(n < 0 ? remain : 0);
-
- addr += PAGE_SIZE;
- remain -= PAGE_SIZE;
- }
- if(remain == 0)
- return(0);
-
- n = do_op(addr, remain, is_write, op, arg);
- if(n != 0)
- return(n < 0 ? remain : 0);
- return(0);
-}
-
-static int copy_chunk_from_user(unsigned long from, int len, void *arg)
-{
- unsigned long *to_ptr = arg, to = *to_ptr;
-
- memcpy((void *) to, (void *) from, len);
- *to_ptr += len;
- return(0);
-}
-
-int copy_from_user_skas(void *to, const void *from, int n)
-{
- if(segment_eq(get_fs(), KERNEL_DS)){
- memcpy(to, from, n);
- return(0);
- }
-
- return(access_ok_skas(VERIFY_READ, from, n) ?
- buffer_op((unsigned long) from, n, 0, copy_chunk_from_user, &to):
- n);
-}
-
-static int copy_chunk_to_user(unsigned long to, int len, void *arg)
-{
- unsigned long *from_ptr = arg, from = *from_ptr;
-
- memcpy((void *) to, (void *) from, len);
- *from_ptr += len;
- return(0);
-}
-
-int copy_to_user_skas(void *to, const void *from, int n)
-{
- if(segment_eq(get_fs(), KERNEL_DS)){
- memcpy(to, from, n);
- return(0);
- }
-
- return(access_ok_skas(VERIFY_WRITE, to, n) ?
- buffer_op((unsigned long) to, n, 1, copy_chunk_to_user, &from) :
- n);
-}
-
-static int strncpy_chunk_from_user(unsigned long from, int len, void *arg)
-{
- char **to_ptr = arg, *to = *to_ptr;
- int n;
-
- strncpy(to, (void *) from, len);
- n = strnlen(to, len);
- *to_ptr += n;
-
- if(n < len)
- return(1);
- return(0);
-}
-
-int strncpy_from_user_skas(char *dst, const char *src, int count)
-{
- int n;
- char *ptr = dst;
-
- if(segment_eq(get_fs(), KERNEL_DS)){
- strncpy(dst, src, count);
- return(strnlen(dst, count));
- }
-
- if(!access_ok_skas(VERIFY_READ, src, 1))
- return(-EFAULT);
-
- n = buffer_op((unsigned long) src, count, 0, strncpy_chunk_from_user,
- &ptr);
- if(n != 0)
- return(-EFAULT);
- return(strnlen(dst, count));
-}
-
-static int clear_chunk(unsigned long addr, int len, void *unused)
-{
- memset((void *) addr, 0, len);
- return(0);
-}
-
-int __clear_user_skas(void *mem, int len)
-{
- return(buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL));
-}
-
-int clear_user_skas(void *mem, int len)
-{
- if(segment_eq(get_fs(), KERNEL_DS)){
- memset(mem, 0, len);
- return(0);
- }
-
- return(access_ok_skas(VERIFY_WRITE, mem, len) ?
- buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL) : len);
-}
-
-static int strnlen_chunk(unsigned long str, int len, void *arg)
-{
- int *len_ptr = arg, n;
-
- n = strnlen((void *) str, len);
- *len_ptr += n;
-
- if(n < len)
- return(1);
- return(0);
-}
-
-int strnlen_user_skas(const void *str, int len)
-{
- int count = 0, n;
-
- if(segment_eq(get_fs(), KERNEL_DS))
- return(strnlen(str, len) + 1);
-
- n = buffer_op((unsigned long) str, len, 0, strnlen_chunk, &count);
- if(n == 0)
- return(count + 1);
- return(-EFAULT);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
- * Licensed under the GPL
- */
-
-#include "linux/sched.h"
-#include "asm/uaccess.h"
-
-int copy_from_user_tt(void *to, const void *from, int n)
-{
- if(!access_ok_tt(VERIFY_READ, from, n))
- return(n);
-
- return(__do_copy_from_user(to, from, n, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int copy_to_user_tt(void *to, const void *from, int n)
-{
- if(!access_ok_tt(VERIFY_WRITE, to, n))
- return(n);
-
- return(__do_copy_to_user(to, from, n, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int strncpy_from_user_tt(char *dst, const char *src, int count)
-{
- int n;
-
- if(!access_ok_tt(VERIFY_READ, src, 1))
- return(-EFAULT);
-
- n = __do_strncpy_from_user(dst, src, count,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher);
- if(n < 0) return(-EFAULT);
- return(n);
-}
-
-int __clear_user_tt(void *mem, int len)
-{
- return(__do_clear_user(mem, len,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int clear_user_tt(void *mem, int len)
-{
- if(!access_ok_tt(VERIFY_WRITE, mem, len))
- return(len);
-
- return(__do_clear_user(mem, len, ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-int strnlen_user_tt(const void *str, int len)
-{
- return(__do_strnlen_user(str, len,
- ¤t->thread.fault_addr,
- ¤t->thread.fault_catcher));
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-#include "linux/types.h"
-#include "linux/module.h"
-
-/* Some of this are builtin function (some are not but could in the future),
- * so I *must* declare good prototypes for them and then EXPORT them.
- * The kernel code uses the macro defined by include/linux/string.h,
- * so I undef macros; the userspace code does not include that and I
- * add an EXPORT for the glibc one.*/
-
-#undef strlen
-#undef strstr
-#undef memcpy
-#undef memset
-
-extern size_t strlen(const char *);
-extern void *memcpy(void *, const void *, size_t);
-extern void *memset(void *, int, size_t);
-extern int printf(const char *, ...);
-
-EXPORT_SYMBOL(strlen);
-EXPORT_SYMBOL(memcpy);
-EXPORT_SYMBOL(memset);
-EXPORT_SYMBOL(printf);
-
-EXPORT_SYMBOL(strstr);
-
-/* Here, instead, I can provide a fake prototype. Yes, someone cares: genksyms.
- * However, the modules will use the CRC defined *here*, no matter if it is
- * good; so the versions of these symbols will always match
- */
-#define EXPORT_SYMBOL_PROTO(sym) \
- int sym(void); \
- EXPORT_SYMBOL(sym);
-
-EXPORT_SYMBOL_PROTO(__errno_location);
-
-EXPORT_SYMBOL_PROTO(access);
-EXPORT_SYMBOL_PROTO(open);
-EXPORT_SYMBOL_PROTO(open64);
-EXPORT_SYMBOL_PROTO(close);
-EXPORT_SYMBOL_PROTO(read);
-EXPORT_SYMBOL_PROTO(write);
-EXPORT_SYMBOL_PROTO(dup2);
-EXPORT_SYMBOL_PROTO(__xstat);
-EXPORT_SYMBOL_PROTO(__lxstat);
-EXPORT_SYMBOL_PROTO(__lxstat64);
-EXPORT_SYMBOL_PROTO(lseek);
-EXPORT_SYMBOL_PROTO(lseek64);
-EXPORT_SYMBOL_PROTO(chown);
-EXPORT_SYMBOL_PROTO(truncate);
-EXPORT_SYMBOL_PROTO(utime);
-EXPORT_SYMBOL_PROTO(chmod);
-EXPORT_SYMBOL_PROTO(rename);
-EXPORT_SYMBOL_PROTO(__xmknod);
-
-EXPORT_SYMBOL_PROTO(symlink);
-EXPORT_SYMBOL_PROTO(link);
-EXPORT_SYMBOL_PROTO(unlink);
-EXPORT_SYMBOL_PROTO(readlink);
-
-EXPORT_SYMBOL_PROTO(mkdir);
-EXPORT_SYMBOL_PROTO(rmdir);
-EXPORT_SYMBOL_PROTO(opendir);
-EXPORT_SYMBOL_PROTO(readdir);
-EXPORT_SYMBOL_PROTO(closedir);
-EXPORT_SYMBOL_PROTO(seekdir);
-EXPORT_SYMBOL_PROTO(telldir);
-
-EXPORT_SYMBOL_PROTO(ioctl);
-
-EXPORT_SYMBOL_PROTO(pread64);
-EXPORT_SYMBOL_PROTO(pwrite64);
-
-EXPORT_SYMBOL_PROTO(statfs);
-EXPORT_SYMBOL_PROTO(statfs64);
-
-EXPORT_SYMBOL_PROTO(getuid);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-#
-# Makefile for the linux kernel.
-#
-
-extra-y := head.o head64.o init_task.o vmlinux.lds.s
-EXTRA_AFLAGS := -traditional
-obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o \
- ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_x86_64.o \
- x8664_ksyms.o i387.o syscall.o vsyscall.o \
- setup64.o bootflag.o e820.o reboot.o warmreboot.o
-obj-y += mce.o
-
-obj-$(CONFIG_MTRR) += ../../i386/kernel/cpu/mtrr/
-obj-$(CONFIG_ACPI_BOOT) += acpi/
-obj-$(CONFIG_X86_MSR) += msr.o
-obj-$(CONFIG_MICROCODE) += microcode.o
-obj-$(CONFIG_X86_CPUID) += cpuid.o
-obj-$(CONFIG_SMP) += smp.o smpboot.o trampoline.o
-obj-$(CONFIG_X86_LOCAL_APIC) += apic.o nmi.o
-obj-$(CONFIG_X86_IO_APIC) += io_apic.o mpparse.o
-obj-$(CONFIG_PM) += suspend.o
-obj-$(CONFIG_SOFTWARE_SUSPEND) += suspend_asm.o
-obj-$(CONFIG_CPU_FREQ) += cpufreq/
-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-obj-$(CONFIG_GART_IOMMU) += pci-gart.o aperture.o
-obj-$(CONFIG_DUMMY_IOMMU) += pci-nommu.o pci-dma.o
-obj-$(CONFIG_SWIOTLB) += swiotlb.o
-obj-$(CONFIG_SCHED_SMT) += domain.o
-
-obj-$(CONFIG_MODULES) += module.o
-
-obj-y += topology.o
-
-bootflag-y += ../../i386/kernel/bootflag.o
-cpuid-$(subst m,y,$(CONFIG_X86_CPUID)) += ../../i386/kernel/cpuid.o
-topology-y += ../../i386/mach-default/topology.o
-swiotlb-$(CONFIG_SWIOTLB) += ../../ia64/lib/swiotlb.o
-microcode-$(subst m,y,$(CONFIG_MICROCODE)) += ../../i386/kernel/microcode.o
+++ /dev/null
-/*
- * ARM/ARM26 default IDE host driver
- *
- * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
- * Based on code by: Russell King, Ian Molton and Alexander Schulz.
- *
- * May be copied or modified under the terms of the GNU General Public License.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ide.h>
-
-#include <asm/mach-types.h>
-#include <asm/irq.h>
-
-#ifdef CONFIG_ARM26
-# define IDE_ARM_HOST (machine_is_a5k())
-#else
-# define IDE_ARM_HOST (1)
-#endif
-
-#ifdef CONFIG_ARCH_CLPS7500
-# include <asm/arch/hardware.h>
-#
-# define IDE_ARM_IO (ISASLOT_IO + 0x1f0)
-# define IDE_ARM_IRQ IRQ_ISA_14
-#else
-# define IDE_ARM_IO 0x1f0
-# define IDE_ARM_IRQ IRQ_HARDDISK
-#endif
-
-void __init ide_arm_init(void)
-{
- if (IDE_ARM_HOST) {
- hw_regs_t hw;
-
- memset(&hw, 0, sizeof(hw));
- ide_std_init_ports(&hw, IDE_ARM_IO, IDE_ARM_IO + 0x206);
- hw.irq = IDE_ARM_IRQ;
- ide_register_hw(&hw, NULL);
- }
-}
+++ /dev/null
-#
-# Makefile for the IBM PPC4xx EMAC controllers
-#
-
-obj-$(CONFIG_IBM_EMAC) += ibm_emac.o
-
-ibm_emac-objs := ibm_emac_mal.o ibm_emac_core.o ibm_emac_phy.o
-
-# Only need this if you want to see additional debug messages
-ifeq ($(CONFIG_IBM_EMAC_ERRMSG), y)
-ibm_emac-objs += ibm_emac_debug.o
-endif
+++ /dev/null
-/*
- * ibm_emac_core.c
- *
- * Ethernet driver for the built in ethernet on the IBM 4xx PowerPC
- * processors.
- *
- * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
- *
- * Based on original work by
- *
- * Armin Kuster <akuster@mvista.com>
- * Johnnie Peters <jpeters@mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- * TODO
- * - Check for races in the "remove" code path
- * - Add some Power Management to the MAC and the PHY
- * - Audit remaining of non-rewritten code (--BenH)
- * - Cleanup message display using msglevel mecanism
- * - Address all errata
- * - Audit all register update paths to ensure they
- * are being written post soft reset if required.
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/dma-mapping.h>
-#include <linux/ethtool.h>
-#include <linux/mii.h>
-
-#include <asm/processor.h>
-#include <asm/bitops.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/ocp.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/crc32.h>
-
-#include "ibm_emac_core.h"
-
-//#define MDIO_DEBUG(fmt) printk fmt
-#define MDIO_DEBUG(fmt)
-
-//#define LINK_DEBUG(fmt) printk fmt
-#define LINK_DEBUG(fmt)
-
-//#define PKT_DEBUG(fmt) printk fmt
-#define PKT_DEBUG(fmt)
-
-#define DRV_NAME "emac"
-#define DRV_VERSION "2.0"
-#define DRV_AUTHOR "Benjamin Herrenschmidt <benh@kernel.crashing.org>"
-#define DRV_DESC "IBM EMAC Ethernet driver"
-
-/*
- * When mdio_idx >= 0, contains a list of emac ocp_devs
- * that have had their initialization deferred until the
- * common MDIO controller has been initialized.
- */
-LIST_HEAD(emac_init_list);
-
-MODULE_AUTHOR(DRV_AUTHOR);
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_LICENSE("GPL");
-
-static int skb_res = SKB_RES;
-module_param(skb_res, int, 0444);
-MODULE_PARM_DESC(skb_res, "Amount of data to reserve on skb buffs\n"
- "The 405 handles a misaligned IP header fine but\n"
- "this can help if you are routing to a tunnel or a\n"
- "device that needs aligned data. 0..2");
-
-#define RGMII_PRIV(ocpdev) ((struct ibm_ocp_rgmii*)ocp_get_drvdata(ocpdev))
-
-static unsigned int rgmii_enable[] =
- { RGMII_RTBI, RGMII_RGMII, RGMII_TBI, RGMII_GMII };
-
-static unsigned int rgmii_speed_mask[] = { 0,
- 0,
- RGMII_MII2_SPDMASK,
- RGMII_MII3_SPDMASK
-};
-
-static unsigned int rgmii_speed100[] = { 0,
- 0,
- RGMII_MII2_100MB,
- RGMII_MII3_100MB
-};
-
-static unsigned int rgmii_speed1000[] = { 0,
- 0,
- RGMII_MII2_1000MB,
- RGMII_MII3_1000MB
-};
-
-#define ZMII_PRIV(ocpdev) ((struct ibm_ocp_zmii*)ocp_get_drvdata(ocpdev))
-
-static unsigned int zmii_enable[][4] = {
- {ZMII_SMII0, ZMII_RMII0, ZMII_MII0,
- ~(ZMII_MDI1 | ZMII_MDI2 | ZMII_MDI3)},
- {ZMII_SMII1, ZMII_RMII1, ZMII_MII1,
- ~(ZMII_MDI0 | ZMII_MDI2 | ZMII_MDI3)},
- {ZMII_SMII2, ZMII_RMII2, ZMII_MII2,
- ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI3)},
- {ZMII_SMII3, ZMII_RMII3, ZMII_MII3, ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI2)}
-};
-static unsigned int mdi_enable[] =
- { ZMII_MDI0, ZMII_MDI1, ZMII_MDI2, ZMII_MDI3 };
-
-static unsigned int zmii_speed = 0x0;
-static unsigned int zmii_speed100[] = { ZMII_MII0_100MB, ZMII_MII1_100MB };
-
-/* Since multiple EMACs share MDIO lines in various ways, we need
- * to avoid re-using the same PHY ID in cases where the arch didn't
- * setup precise phy_map entries
- */
-static u32 busy_phy_map = 0;
-
-/* If EMACs share a common MDIO device, this points to it */
-static struct net_device *mdio_ndev = NULL;
-
-struct emac_def_dev {
- struct list_head link;
- struct ocp_device *ocpdev;
- struct ibm_ocp_mal *mal;
-};
-
-static struct net_device_stats *emac_stats(struct net_device *dev)
-{
- struct ocp_enet_private *fep = dev->priv;
- return &fep->stats;
-};
-
-static int
-emac_init_rgmii(struct ocp_device *rgmii_dev, int input, int phy_mode)
-{
- struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(rgmii_dev);
- const char *mode_name[] = { "RTBI", "RGMII", "TBI", "GMII" };
- int mode = -1;
-
- if (!rgmii) {
- rgmii = kmalloc(sizeof(struct ibm_ocp_rgmii), GFP_KERNEL);
-
- if (rgmii == NULL) {
- printk(KERN_ERR
- "rgmii%d: Out of memory allocating RGMII structure!\n",
- rgmii_dev->def->index);
- return -ENOMEM;
- }
-
- memset(rgmii, 0, sizeof(*rgmii));
-
- rgmii->base =
- (struct rgmii_regs *)ioremap(rgmii_dev->def->paddr,
- sizeof(*rgmii->base));
- if (rgmii->base == NULL) {
- printk(KERN_ERR
- "rgmii%d: Cannot ioremap bridge registers!\n",
- rgmii_dev->def->index);
-
- kfree(rgmii);
- return -ENOMEM;
- }
- ocp_set_drvdata(rgmii_dev, rgmii);
- }
-
- if (phy_mode) {
- switch (phy_mode) {
- case PHY_MODE_GMII:
- mode = GMII;
- break;
- case PHY_MODE_TBI:
- mode = TBI;
- break;
- case PHY_MODE_RTBI:
- mode = RTBI;
- break;
- case PHY_MODE_RGMII:
- default:
- mode = RGMII;
- }
- rgmii->base->fer &= ~RGMII_FER_MASK(input);
- rgmii->base->fer |= rgmii_enable[mode] << (4 * input);
- } else {
- switch ((rgmii->base->fer & RGMII_FER_MASK(input)) >> (4 *
- input)) {
- case RGMII_RTBI:
- mode = RTBI;
- break;
- case RGMII_RGMII:
- mode = RGMII;
- break;
- case RGMII_TBI:
- mode = TBI;
- break;
- case RGMII_GMII:
- mode = GMII;
- }
- }
-
- /* Set mode to RGMII if nothing valid is detected */
- if (mode < 0)
- mode = RGMII;
-
- printk(KERN_NOTICE "rgmii%d: input %d in %s mode\n",
- rgmii_dev->def->index, input, mode_name[mode]);
-
- rgmii->mode[input] = mode;
- rgmii->users++;
-
- return 0;
-}
-
-static void
-emac_rgmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
-{
- struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
- unsigned int rgmii_speed;
-
- rgmii_speed = in_be32(&rgmii->base->ssr);
-
- rgmii_speed &= ~rgmii_speed_mask[input];
-
- if (speed == 1000)
- rgmii_speed |= rgmii_speed1000[input];
- else if (speed == 100)
- rgmii_speed |= rgmii_speed100[input];
-
- out_be32(&rgmii->base->ssr, rgmii_speed);
-}
-
-static void emac_close_rgmii(struct ocp_device *ocpdev)
-{
- struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
- BUG_ON(!rgmii || rgmii->users == 0);
-
- if (!--rgmii->users) {
- ocp_set_drvdata(ocpdev, NULL);
- iounmap((void *)rgmii->base);
- kfree(rgmii);
- }
-}
-
-static int emac_init_zmii(struct ocp_device *zmii_dev, int input, int phy_mode)
-{
- struct ibm_ocp_zmii *zmii = ZMII_PRIV(zmii_dev);
- const char *mode_name[] = { "SMII", "RMII", "MII" };
- int mode = -1;
-
- if (!zmii) {
- zmii = kmalloc(sizeof(struct ibm_ocp_zmii), GFP_KERNEL);
- if (zmii == NULL) {
- printk(KERN_ERR
- "zmii%d: Out of memory allocating ZMII structure!\n",
- zmii_dev->def->index);
- return -ENOMEM;
- }
- memset(zmii, 0, sizeof(*zmii));
-
- zmii->base =
- (struct zmii_regs *)ioremap(zmii_dev->def->paddr,
- sizeof(*zmii->base));
- if (zmii->base == NULL) {
- printk(KERN_ERR
- "zmii%d: Cannot ioremap bridge registers!\n",
- zmii_dev->def->index);
-
- kfree(zmii);
- return -ENOMEM;
- }
- ocp_set_drvdata(zmii_dev, zmii);
- }
-
- if (phy_mode) {
- switch (phy_mode) {
- case PHY_MODE_MII:
- mode = MII;
- break;
- case PHY_MODE_RMII:
- mode = RMII;
- break;
- case PHY_MODE_SMII:
- default:
- mode = SMII;
- }
- zmii->base->fer &= ~ZMII_FER_MASK(input);
- zmii->base->fer |= zmii_enable[input][mode];
- } else {
- switch ((zmii->base->fer & ZMII_FER_MASK(input)) << (4 * input)) {
- case ZMII_MII0:
- mode = MII;
- break;
- case ZMII_RMII0:
- mode = RMII;
- break;
- case ZMII_SMII0:
- mode = SMII;
- }
- }
-
- /* Set mode to SMII if nothing valid is detected */
- if (mode < 0)
- mode = SMII;
-
- printk(KERN_NOTICE "zmii%d: input %d in %s mode\n",
- zmii_dev->def->index, input, mode_name[mode]);
-
- zmii->mode[input] = mode;
- zmii->users++;
-
- return 0;
-}
-
-static void emac_enable_zmii_port(struct ocp_device *ocpdev, int input)
-{
- u32 mask;
- struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
-
- mask = in_be32(&zmii->base->fer);
- mask &= zmii_enable[input][MDI]; /* turn all non enabled MDI's off */
- mask |= zmii_enable[input][zmii->mode[input]] | mdi_enable[input];
- out_be32(&zmii->base->fer, mask);
-}
-
-static void
-emac_zmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
-{
- struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
-
- if (speed == 100)
- zmii_speed |= zmii_speed100[input];
- else
- zmii_speed &= ~zmii_speed100[input];
-
- out_be32(&zmii->base->ssr, zmii_speed);
-}
-
-static void emac_close_zmii(struct ocp_device *ocpdev)
-{
- struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
- BUG_ON(!zmii || zmii->users == 0);
-
- if (!--zmii->users) {
- ocp_set_drvdata(ocpdev, NULL);
- iounmap((void *)zmii->base);
- kfree(zmii);
- }
-}
-
-int emac_phy_read(struct net_device *dev, int mii_id, int reg)
-{
- uint32_t stacr;
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
-
- MDIO_DEBUG(("%s: phy_read, id: 0x%x, reg: 0x%x\n", dev->name, mii_id,
- reg));
-
- /* Enable proper ZMII port */
- if (fep->zmii_dev)
- emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
-
- /* Use the EMAC that has the MDIO port */
- if (fep->mdio_dev) {
- dev = fep->mdio_dev;
- fep = dev->priv;
- emacp = fep->emacp;
- }
-
- udelay(MDIO_DELAY);
-
- if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0) {
- printk(KERN_WARNING "%s: PHY read timeout #1!\n", dev->name);
- return -1;
- }
-
- /* Clear the speed bits and make a read request to the PHY */
- stacr = ((EMAC_STACR_READ | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
- stacr |= ((mii_id & 0x1F) << 5);
-
- out_be32(&emacp->em0stacr, stacr);
-
- udelay(MDIO_DELAY);
- stacr = in_be32(&emacp->em0stacr);
-
- if ((stacr & EMAC_STACR_OC) == 0) {
- printk(KERN_WARNING "%s: PHY read timeout #2!\n", dev->name);
- return -1;
- }
-
- /* Check for a read error */
- if (stacr & EMAC_STACR_PHYE) {
- MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
- return -1;
- }
-
- MDIO_DEBUG((" -> 0x%x\n", stacr >> 16));
-
- return (stacr >> 16);
-}
-
-void emac_phy_write(struct net_device *dev, int mii_id, int reg, int data)
-{
- uint32_t stacr;
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
-
- MDIO_DEBUG(("%s phy_write, id: 0x%x, reg: 0x%x, data: 0x%x\n",
- dev->name, mii_id, reg, data));
-
- /* Enable proper ZMII port */
- if (fep->zmii_dev)
- emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
-
- /* Use the EMAC that has the MDIO port */
- if (fep->mdio_dev) {
- dev = fep->mdio_dev;
- fep = dev->priv;
- emacp = fep->emacp;
- }
-
- udelay(MDIO_DELAY);
-
- if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0) {
- printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
- return;
- }
-
- /* Clear the speed bits and make a read request to the PHY */
-
- stacr = ((EMAC_STACR_WRITE | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
- stacr |= ((mii_id & 0x1f) << 5) | ((data & 0xffff) << 16);
-
- out_be32(&emacp->em0stacr, stacr);
-
- udelay(MDIO_DELAY);
-
- if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0)
- printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
-
- /* Check for a write error */
- if ((stacr & EMAC_STACR_PHYE) != 0) {
- MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
- }
-}
-
-static void emac_txeob_dev(void *param, u32 chanmask)
-{
- struct net_device *dev = param;
- struct ocp_enet_private *fep = dev->priv;
- unsigned long flags;
-
- spin_lock_irqsave(&fep->lock, flags);
-
- PKT_DEBUG(("emac_txeob_dev() entry, tx_cnt: %d\n", fep->tx_cnt));
-
- while (fep->tx_cnt &&
- !(fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_READY)) {
-
- if (fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_LAST) {
- /* Tell the system the transmit completed. */
- dma_unmap_single(&fep->ocpdev->dev,
- fep->tx_desc[fep->ack_slot].data_ptr,
- fep->tx_desc[fep->ack_slot].data_len,
- DMA_TO_DEVICE);
- dev_kfree_skb_irq(fep->tx_skb[fep->ack_slot]);
-
- if (fep->tx_desc[fep->ack_slot].ctrl &
- (EMAC_TX_ST_EC | EMAC_TX_ST_MC | EMAC_TX_ST_SC))
- fep->stats.collisions++;
- }
-
- fep->tx_skb[fep->ack_slot] = (struct sk_buff *)NULL;
- if (++fep->ack_slot == NUM_TX_BUFF)
- fep->ack_slot = 0;
-
- fep->tx_cnt--;
- }
- if (fep->tx_cnt < NUM_TX_BUFF)
- netif_wake_queue(dev);
-
- PKT_DEBUG(("emac_txeob_dev() exit, tx_cnt: %d\n", fep->tx_cnt));
-
- spin_unlock_irqrestore(&fep->lock, flags);
-}
-
-/*
- Fill/Re-fill the rx chain with valid ctrl/ptrs.
- This function will fill from rx_slot up to the parm end.
- So to completely fill the chain pre-set rx_slot to 0 and
- pass in an end of 0.
- */
-static void emac_rx_fill(struct net_device *dev, int end)
-{
- int i;
- struct ocp_enet_private *fep = dev->priv;
-
- i = fep->rx_slot;
- do {
- /* We don't want the 16 bytes skb_reserve done by dev_alloc_skb,
- * it breaks our cache line alignement. However, we still allocate
- * +16 so that we end up allocating the exact same size as
- * dev_alloc_skb() would do.
- * Also, because of the skb_res, the max DMA size we give to EMAC
- * is slighly wrong, causing it to potentially DMA 2 more bytes
- * from a broken/oversized packet. These 16 bytes will take care
- * that we don't walk on somebody else toes with that.
- */
- fep->rx_skb[i] =
- alloc_skb(fep->rx_buffer_size + 16, GFP_ATOMIC);
-
- if (fep->rx_skb[i] == NULL) {
- /* Keep rx_slot here, the next time clean/fill is called
- * we will try again before the MAL wraps back here
- * If the MAL tries to use this descriptor with
- * the EMPTY bit off it will cause the
- * rxde interrupt. That is where we will
- * try again to allocate an sk_buff.
- */
- break;
-
- }
-
- if (skb_res)
- skb_reserve(fep->rx_skb[i], skb_res);
-
- /* We must NOT dma_map_single the cache line right after the
- * buffer, so we must crop our sync size to account for the
- * reserved space
- */
- fep->rx_desc[i].data_ptr =
- (unsigned char *)dma_map_single(&fep->ocpdev->dev,
- (void *)fep->rx_skb[i]->
- data,
- fep->rx_buffer_size -
- skb_res, DMA_FROM_DEVICE);
-
- /*
- * Some 4xx implementations use the previously
- * reserved bits in data_len to encode the MS
- * 4-bits of a 36-bit physical address (ERPN)
- * This must be initialized.
- */
- fep->rx_desc[i].data_len = 0;
- fep->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR |
- (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
-
- } while ((i = (i + 1) % NUM_RX_BUFF) != end);
-
- fep->rx_slot = i;
-}
-
-static void
-emac_rx_csum(struct net_device *dev, unsigned short ctrl, struct sk_buff *skb)
-{
- struct ocp_enet_private *fep = dev->priv;
-
- /* Exit if interface has no TAH engine */
- if (!fep->tah_dev) {
- skb->ip_summed = CHECKSUM_NONE;
- return;
- }
-
- /* Check for TCP/UDP/IP csum error */
- if (ctrl & EMAC_CSUM_VER_ERROR) {
- /* Let the stack verify checksum errors */
- skb->ip_summed = CHECKSUM_NONE;
-/* adapter->hw_csum_err++; */
- } else {
- /* Csum is good */
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-/* adapter->hw_csum_good++; */
- }
-}
-
-static int emac_rx_clean(struct net_device *dev)
-{
- int i, b, bnum, buf[6];
- int error, frame_length;
- struct ocp_enet_private *fep = dev->priv;
- unsigned short ctrl;
-
- i = fep->rx_slot;
-
- PKT_DEBUG(("emac_rx_clean() entry, rx_slot: %d\n", fep->rx_slot));
-
- do {
- if (fep->rx_skb[i] == NULL)
- continue; /*we have already handled the packet but haved failed to alloc */
- /*
- since rx_desc is in uncached mem we don't keep reading it directly
- we pull out a local copy of ctrl and do the checks on the copy.
- */
- ctrl = fep->rx_desc[i].ctrl;
- if (ctrl & MAL_RX_CTRL_EMPTY)
- break; /*we don't have any more ready packets */
-
- if (EMAC_IS_BAD_RX_PACKET(ctrl)) {
- fep->stats.rx_errors++;
- fep->stats.rx_dropped++;
-
- if (ctrl & EMAC_RX_ST_OE)
- fep->stats.rx_fifo_errors++;
- if (ctrl & EMAC_RX_ST_AE)
- fep->stats.rx_frame_errors++;
- if (ctrl & EMAC_RX_ST_BFCS)
- fep->stats.rx_crc_errors++;
- if (ctrl & (EMAC_RX_ST_RP | EMAC_RX_ST_PTL |
- EMAC_RX_ST_ORE | EMAC_RX_ST_IRE))
- fep->stats.rx_length_errors++;
- } else {
- if ((ctrl & (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) ==
- (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) {
- /* Single descriptor packet */
- emac_rx_csum(dev, ctrl, fep->rx_skb[i]);
- /* Send the skb up the chain. */
- frame_length = fep->rx_desc[i].data_len - 4;
- skb_put(fep->rx_skb[i], frame_length);
- fep->rx_skb[i]->dev = dev;
- fep->rx_skb[i]->protocol =
- eth_type_trans(fep->rx_skb[i], dev);
- error = netif_rx(fep->rx_skb[i]);
-
- if ((error == NET_RX_DROP) ||
- (error == NET_RX_BAD)) {
- fep->stats.rx_dropped++;
- } else {
- fep->stats.rx_packets++;
- fep->stats.rx_bytes += frame_length;
- }
- fep->rx_skb[i] = NULL;
- } else {
- /* Multiple descriptor packet */
- if (ctrl & MAL_RX_CTRL_FIRST) {
- if (fep->rx_desc[(i + 1) % NUM_RX_BUFF].
- ctrl & MAL_RX_CTRL_EMPTY)
- break;
- bnum = 0;
- buf[bnum] = i;
- ++bnum;
- continue;
- }
- if (((ctrl & MAL_RX_CTRL_FIRST) !=
- MAL_RX_CTRL_FIRST) &&
- ((ctrl & MAL_RX_CTRL_LAST) !=
- MAL_RX_CTRL_LAST)) {
- if (fep->rx_desc[(i + 1) %
- NUM_RX_BUFF].ctrl &
- MAL_RX_CTRL_EMPTY) {
- i = buf[0];
- break;
- }
- buf[bnum] = i;
- ++bnum;
- continue;
- }
- if (ctrl & MAL_RX_CTRL_LAST) {
- buf[bnum] = i;
- ++bnum;
- skb_put(fep->rx_skb[buf[0]],
- fep->rx_desc[buf[0]].data_len);
- for (b = 1; b < bnum; b++) {
- /*
- * MAL is braindead, we need
- * to copy the remainder
- * of the packet from the
- * latter descriptor buffers
- * to the first skb. Then
- * dispose of the source
- * skbs.
- *
- * Once the stack is fixed
- * to handle frags on most
- * protocols we can generate
- * a fragmented skb with
- * no copies.
- */
- memcpy(fep->rx_skb[buf[0]]->
- data +
- fep->rx_skb[buf[0]]->len,
- fep->rx_skb[buf[b]]->
- data,
- fep->rx_desc[buf[b]].
- data_len);
- skb_put(fep->rx_skb[buf[0]],
- fep->rx_desc[buf[b]].
- data_len);
- dma_unmap_single(&fep->ocpdev->
- dev,
- fep->
- rx_desc[buf
- [b]].
- data_ptr,
- fep->
- rx_desc[buf
- [b]].
- data_len,
- DMA_FROM_DEVICE);
- dev_kfree_skb(fep->
- rx_skb[buf[b]]);
- }
- emac_rx_csum(dev, ctrl,
- fep->rx_skb[buf[0]]);
-
- fep->rx_skb[buf[0]]->dev = dev;
- fep->rx_skb[buf[0]]->protocol =
- eth_type_trans(fep->rx_skb[buf[0]],
- dev);
- error = netif_rx(fep->rx_skb[buf[0]]);
-
- if ((error == NET_RX_DROP)
- || (error == NET_RX_BAD)) {
- fep->stats.rx_dropped++;
- } else {
- fep->stats.rx_packets++;
- fep->stats.rx_bytes +=
- fep->rx_skb[buf[0]]->len;
- }
- for (b = 0; b < bnum; b++)
- fep->rx_skb[buf[b]] = NULL;
- }
- }
- }
- } while ((i = (i + 1) % NUM_RX_BUFF) != fep->rx_slot);
-
- PKT_DEBUG(("emac_rx_clean() exit, rx_slot: %d\n", fep->rx_slot));
-
- return i;
-}
-
-static void emac_rxeob_dev(void *param, u32 chanmask)
-{
- struct net_device *dev = param;
- struct ocp_enet_private *fep = dev->priv;
- unsigned long flags;
- int n;
-
- spin_lock_irqsave(&fep->lock, flags);
- if ((n = emac_rx_clean(dev)) != fep->rx_slot)
- emac_rx_fill(dev, n);
- spin_unlock_irqrestore(&fep->lock, flags);
-}
-
-/*
- * This interrupt should never occurr, we don't program
- * the MAL for contiunous mode.
- */
-static void emac_txde_dev(void *param, u32 chanmask)
-{
- struct net_device *dev = param;
- struct ocp_enet_private *fep = dev->priv;
-
- printk(KERN_WARNING "%s: transmit descriptor error\n", dev->name);
-
- emac_mac_dump(dev);
- emac_mal_dump(dev);
-
- /* Reenable the transmit channel */
- mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
-}
-
-/*
- * This interrupt should be very rare at best. This occurs when
- * the hardware has a problem with the receive descriptors. The manual
- * states that it occurs when the hardware cannot the receive descriptor
- * empty bit is not set. The recovery mechanism will be to
- * traverse through the descriptors, handle any that are marked to be
- * handled and reinitialize each along the way. At that point the driver
- * will be restarted.
- */
-static void emac_rxde_dev(void *param, u32 chanmask)
-{
- struct net_device *dev = param;
- struct ocp_enet_private *fep = dev->priv;
- unsigned long flags;
-
- if (net_ratelimit()) {
- printk(KERN_WARNING "%s: receive descriptor error\n",
- fep->ndev->name);
-
- emac_mac_dump(dev);
- emac_mal_dump(dev);
- emac_desc_dump(dev);
- }
-
- /* Disable RX channel */
- spin_lock_irqsave(&fep->lock, flags);
- mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
-
- /* For now, charge the error against all emacs */
- fep->stats.rx_errors++;
-
- /* so do we have any good packets still? */
- emac_rx_clean(dev);
-
- /* When the interface is restarted it resets processing to the
- * first descriptor in the table.
- */
-
- fep->rx_slot = 0;
- emac_rx_fill(dev, 0);
-
- set_mal_dcrn(fep->mal, DCRN_MALRXEOBISR, fep->commac.rx_chan_mask);
- set_mal_dcrn(fep->mal, DCRN_MALRXDEIR, fep->commac.rx_chan_mask);
-
- /* Reenable the receive channels */
- mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
- spin_unlock_irqrestore(&fep->lock, flags);
-}
-
-static irqreturn_t
-emac_mac_irq(int irq, void *dev_instance, struct pt_regs *regs)
-{
- struct net_device *dev = dev_instance;
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
- unsigned long tmp_em0isr;
-
- /* EMAC interrupt */
- tmp_em0isr = in_be32(&emacp->em0isr);
- if (tmp_em0isr & (EMAC_ISR_TE0 | EMAC_ISR_TE1)) {
- /* This error is a hard transmit error - could retransmit */
- fep->stats.tx_errors++;
-
- /* Reenable the transmit channel */
- mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
-
- } else {
- fep->stats.rx_errors++;
- }
-
- if (tmp_em0isr & EMAC_ISR_RP)
- fep->stats.rx_length_errors++;
- if (tmp_em0isr & EMAC_ISR_ALE)
- fep->stats.rx_frame_errors++;
- if (tmp_em0isr & EMAC_ISR_BFCS)
- fep->stats.rx_crc_errors++;
- if (tmp_em0isr & EMAC_ISR_PTLE)
- fep->stats.rx_length_errors++;
- if (tmp_em0isr & EMAC_ISR_ORE)
- fep->stats.rx_length_errors++;
- if (tmp_em0isr & EMAC_ISR_TE0)
- fep->stats.tx_aborted_errors++;
-
- emac_err_dump(dev, tmp_em0isr);
-
- out_be32(&emacp->em0isr, tmp_em0isr);
-
- return IRQ_HANDLED;
-}
-
-static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- unsigned short ctrl;
- unsigned long flags;
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
- int len = skb->len;
- unsigned int offset = 0, size, f, tx_slot_first;
- unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
-
- spin_lock_irqsave(&fep->lock, flags);
-
- len -= skb->data_len;
-
- if ((fep->tx_cnt + nr_frags + len / DESC_BUF_SIZE + 1) > NUM_TX_BUFF) {
- PKT_DEBUG(("emac_start_xmit() stopping queue\n"));
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&fep->lock, flags);
- restore_flags(flags);
- return -EBUSY;
- }
-
- tx_slot_first = fep->tx_slot;
-
- while (len) {
- size = min(len, DESC_BUF_SIZE);
-
- fep->tx_desc[fep->tx_slot].data_len = (short)size;
- fep->tx_desc[fep->tx_slot].data_ptr =
- (unsigned char *)dma_map_single(&fep->ocpdev->dev,
- (void *)((unsigned int)skb->
- data + offset),
- size, DMA_TO_DEVICE);
-
- ctrl = EMAC_TX_CTRL_DFLT;
- if (fep->tx_slot != tx_slot_first)
- ctrl |= MAL_TX_CTRL_READY;
- if ((NUM_TX_BUFF - 1) == fep->tx_slot)
- ctrl |= MAL_TX_CTRL_WRAP;
- if (!nr_frags && (len == size)) {
- ctrl |= MAL_TX_CTRL_LAST;
- fep->tx_skb[fep->tx_slot] = skb;
- }
- if (skb->ip_summed == CHECKSUM_HW)
- ctrl |= EMAC_TX_CTRL_TAH_CSUM;
-
- fep->tx_desc[fep->tx_slot].ctrl = ctrl;
-
- len -= size;
- offset += size;
-
- /* Bump tx count */
- if (++fep->tx_cnt == NUM_TX_BUFF)
- netif_stop_queue(dev);
-
- /* Next descriptor */
- if (++fep->tx_slot == NUM_TX_BUFF)
- fep->tx_slot = 0;
- }
-
- for (f = 0; f < nr_frags; f++) {
- struct skb_frag_struct *frag;
-
- frag = &skb_shinfo(skb)->frags[f];
- len = frag->size;
- offset = 0;
-
- while (len) {
- size = min(len, DESC_BUF_SIZE);
-
- dma_map_page(&fep->ocpdev->dev,
- frag->page,
- frag->page_offset + offset,
- size, DMA_TO_DEVICE);
-
- ctrl = EMAC_TX_CTRL_DFLT | MAL_TX_CTRL_READY;
- if ((NUM_TX_BUFF - 1) == fep->tx_slot)
- ctrl |= MAL_TX_CTRL_WRAP;
- if ((f == (nr_frags - 1)) && (len == size)) {
- ctrl |= MAL_TX_CTRL_LAST;
- fep->tx_skb[fep->tx_slot] = skb;
- }
-
- if (skb->ip_summed == CHECKSUM_HW)
- ctrl |= EMAC_TX_CTRL_TAH_CSUM;
-
- fep->tx_desc[fep->tx_slot].data_len = (short)size;
- fep->tx_desc[fep->tx_slot].data_ptr =
- (char *)((page_to_pfn(frag->page) << PAGE_SHIFT) +
- frag->page_offset + offset);
- fep->tx_desc[fep->tx_slot].ctrl = ctrl;
-
- len -= size;
- offset += size;
-
- /* Bump tx count */
- if (++fep->tx_cnt == NUM_TX_BUFF)
- netif_stop_queue(dev);
-
- /* Next descriptor */
- if (++fep->tx_slot == NUM_TX_BUFF)
- fep->tx_slot = 0;
- }
- }
-
- /*
- * Deferred set READY on first descriptor of packet to
- * avoid TX MAL race.
- */
- fep->tx_desc[tx_slot_first].ctrl |= MAL_TX_CTRL_READY;
-
- /* Send the packet out. */
- out_be32(&emacp->em0tmr0, EMAC_TMR0_XMIT);
-
- fep->stats.tx_packets++;
- fep->stats.tx_bytes += skb->len;
-
- PKT_DEBUG(("emac_start_xmit() exitn"));
-
- spin_unlock_irqrestore(&fep->lock, flags);
-
- return 0;
-}
-
-static int emac_adjust_to_link(struct ocp_enet_private *fep)
-{
- emac_t *emacp = fep->emacp;
- struct ibm_ocp_rgmii *rgmii;
- unsigned long mode_reg;
- int full_duplex, speed;
-
- full_duplex = 0;
- speed = SPEED_10;
-
- /* set mode register 1 defaults */
- mode_reg = EMAC_M1_DEFAULT;
-
- /* Read link mode on PHY */
- if (fep->phy_mii.def->ops->read_link(&fep->phy_mii) == 0) {
- /* If an error occurred, we don't deal with it yet */
- full_duplex = (fep->phy_mii.duplex == DUPLEX_FULL);
- speed = fep->phy_mii.speed;
- }
-
- if (fep->rgmii_dev)
- rgmii = RGMII_PRIV(fep->rgmii_dev);
-
- /* set speed (default is 10Mb) */
- switch (speed) {
- case SPEED_1000:
- mode_reg |= EMAC_M1_JUMBO_ENABLE | EMAC_M1_RFS_16K;
- if ((rgmii->mode[fep->rgmii_input] == RTBI)
- || (rgmii->mode[fep->rgmii_input] == TBI))
- mode_reg |= EMAC_M1_MF_1000GPCS;
- else
- mode_reg |= EMAC_M1_MF_1000MBPS;
- if (fep->rgmii_dev)
- emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
- 1000);
- break;
- case SPEED_100:
- mode_reg |= EMAC_M1_MF_100MBPS | EMAC_M1_RFS_4K;
- if (fep->rgmii_dev)
- emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
- 100);
- if (fep->zmii_dev)
- emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
- 100);
- break;
- case SPEED_10:
- default:
- mode_reg = (mode_reg & ~EMAC_M1_MF_100MBPS) | EMAC_M1_RFS_4K;
- if (fep->rgmii_dev)
- emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
- 10);
- if (fep->zmii_dev)
- emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
- 10);
- }
-
- if (full_duplex)
- mode_reg |= EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_IST;
- else
- mode_reg &= ~(EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_ILE);
-
- LINK_DEBUG(("%s: adjust to link, speed: %d, duplex: %d, opened: %d\n",
- fep->ndev->name, speed, full_duplex, fep->opened));
-
- printk(KERN_INFO "%s: Speed: %d, %s duplex.\n",
- fep->ndev->name, speed, full_duplex ? "Full" : "Half");
- if (fep->opened)
- out_be32(&emacp->em0mr1, mode_reg);
-
- return 0;
-}
-
-static int emac_set_mac_address(struct net_device *ndev, void *p)
-{
- struct ocp_enet_private *fep = ndev->priv;
- emac_t *emacp = fep->emacp;
- struct sockaddr *addr = p;
-
- if (!is_valid_ether_addr(addr->sa_data))
- return -EADDRNOTAVAIL;
-
- memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
-
- /* set the high address */
- out_be32(&emacp->em0iahr,
- (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
-
- /* set the low address */
- out_be32(&emacp->em0ialr,
- (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
- | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
-
- return 0;
-}
-
-static int emac_change_mtu(struct net_device *dev, int new_mtu)
-{
- struct ocp_enet_private *fep = dev->priv;
- int old_mtu = dev->mtu;
- emac_t *emacp = fep->emacp;
- u32 em0mr0;
- int i, full;
- unsigned long flags;
-
- if ((new_mtu < EMAC_MIN_MTU) || (new_mtu > EMAC_MAX_MTU)) {
- printk(KERN_ERR
- "emac: Invalid MTU setting, MTU must be between %d and %d\n",
- EMAC_MIN_MTU, EMAC_MAX_MTU);
- return -EINVAL;
- }
-
- if (old_mtu != new_mtu && netif_running(dev)) {
- /* Stop rx engine */
- em0mr0 = in_be32(&emacp->em0mr0);
- out_be32(&emacp->em0mr0, em0mr0 & ~EMAC_M0_RXE);
-
- /* Wait for descriptors to be empty */
- do {
- full = 0;
- for (i = 0; i < NUM_RX_BUFF; i++)
- if (!(fep->rx_desc[i].ctrl & MAL_RX_CTRL_EMPTY)) {
- printk(KERN_NOTICE
- "emac: RX ring is still full\n");
- full = 1;
- }
- } while (full);
-
- spin_lock_irqsave(&fep->lock, flags);
-
- mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
-
- /* Destroy all old rx skbs */
- for (i = 0; i < NUM_RX_BUFF; i++) {
- dma_unmap_single(&fep->ocpdev->dev,
- fep->rx_desc[i].data_ptr,
- fep->rx_desc[i].data_len,
- DMA_FROM_DEVICE);
- dev_kfree_skb(fep->rx_skb[i]);
- fep->rx_skb[i] = NULL;
- }
-
- /* Set new rx_buffer_size and advertise new mtu */
- fep->rx_buffer_size =
- new_mtu + ENET_HEADER_SIZE + ENET_FCS_SIZE;
- dev->mtu = new_mtu;
-
- /* Re-init rx skbs */
- fep->rx_slot = 0;
- emac_rx_fill(dev, 0);
-
- /* Restart the rx engine */
- mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
- out_be32(&emacp->em0mr0, em0mr0 | EMAC_M0_RXE);
-
- spin_unlock_irqrestore(&fep->lock, flags);
- }
-
- return 0;
-}
-
-static void __emac_set_multicast_list(struct net_device *dev)
-{
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
- u32 rmr = in_be32(&emacp->em0rmr);
-
- /* First clear all special bits, they can be set later */
- rmr &= ~(EMAC_RMR_PME | EMAC_RMR_PMME | EMAC_RMR_MAE);
-
- if (dev->flags & IFF_PROMISC) {
- rmr |= EMAC_RMR_PME;
- } else if (dev->flags & IFF_ALLMULTI || 32 < dev->mc_count) {
- /*
- * Must be setting up to use multicast
- * Now check for promiscuous multicast
- */
- rmr |= EMAC_RMR_PMME;
- } else if (dev->flags & IFF_MULTICAST && 0 < dev->mc_count) {
- unsigned short em0gaht[4] = { 0, 0, 0, 0 };
- struct dev_mc_list *dmi;
-
- /* Need to hash on the multicast address. */
- for (dmi = dev->mc_list; dmi; dmi = dmi->next) {
- unsigned long mc_crc;
- unsigned int bit_number;
-
- mc_crc = ether_crc(6, (char *)dmi->dmi_addr);
- bit_number = 63 - (mc_crc >> 26); /* MSB: 0 LSB: 63 */
- em0gaht[bit_number >> 4] |=
- 0x8000 >> (bit_number & 0x0f);
- }
- emacp->em0gaht1 = em0gaht[0];
- emacp->em0gaht2 = em0gaht[1];
- emacp->em0gaht3 = em0gaht[2];
- emacp->em0gaht4 = em0gaht[3];
-
- /* Turn on multicast addressing */
- rmr |= EMAC_RMR_MAE;
- }
- out_be32(&emacp->em0rmr, rmr);
-}
-
-static int emac_init_tah(struct ocp_enet_private *fep)
-{
- tah_t *tahp;
-
- /* Initialize TAH and enable checksum verification */
- tahp = (tah_t *) ioremap(fep->tah_dev->def->paddr, sizeof(*tahp));
-
- if (tahp == NULL) {
- printk(KERN_ERR "tah%d: Cannot ioremap TAH registers!\n",
- fep->tah_dev->def->index);
-
- return -ENOMEM;
- }
-
- out_be32(&tahp->tah_mr, TAH_MR_SR);
-
- /* wait for reset to complete */
- while (in_be32(&tahp->tah_mr) & TAH_MR_SR) ;
-
- /* 10KB TAH TX FIFO accomodates the max MTU of 9000 */
- out_be32(&tahp->tah_mr,
- TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP |
- TAH_MR_DIG);
-
- iounmap(&tahp);
-
- return 0;
-}
-
-static void emac_init_rings(struct net_device *dev)
-{
- struct ocp_enet_private *ep = dev->priv;
- int loop;
-
- ep->tx_desc = (struct mal_descriptor *)((char *)ep->mal->tx_virt_addr +
- (ep->mal_tx_chan *
- MAL_DT_ALIGN));
- ep->rx_desc =
- (struct mal_descriptor *)((char *)ep->mal->rx_virt_addr +
- (ep->mal_rx_chan * MAL_DT_ALIGN));
-
- /* Fill in the transmit descriptor ring. */
- for (loop = 0; loop < NUM_TX_BUFF; loop++) {
- if (ep->tx_skb[loop]) {
- dma_unmap_single(&ep->ocpdev->dev,
- ep->tx_desc[loop].data_ptr,
- ep->tx_desc[loop].data_len,
- DMA_TO_DEVICE);
- dev_kfree_skb_irq(ep->tx_skb[loop]);
- }
- ep->tx_skb[loop] = NULL;
- ep->tx_desc[loop].ctrl = 0;
- ep->tx_desc[loop].data_len = 0;
- ep->tx_desc[loop].data_ptr = NULL;
- }
- ep->tx_desc[loop - 1].ctrl |= MAL_TX_CTRL_WRAP;
-
- /* Format the receive descriptor ring. */
- ep->rx_slot = 0;
- /* Default is MTU=1500 + Ethernet overhead */
- ep->rx_buffer_size = ENET_DEF_BUF_SIZE;
- emac_rx_fill(dev, 0);
- if (ep->rx_slot != 0) {
- printk(KERN_ERR
- "%s: Not enough mem for RxChain durning Open?\n",
- dev->name);
- /*We couldn't fill the ring at startup?
- *We could clean up and fail to open but right now we will try to
- *carry on. It may be a sign of a bad NUM_RX_BUFF value
- */
- }
-
- ep->tx_cnt = 0;
- ep->tx_slot = 0;
- ep->ack_slot = 0;
-}
-
-static void emac_reset_configure(struct ocp_enet_private *fep)
-{
- emac_t *emacp = fep->emacp;
- int i;
-
- mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
- mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
-
- /*
- * Check for a link, some PHYs don't provide a clock if
- * no link is present. Some EMACs will not come out of
- * soft reset without a PHY clock present.
- */
- if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
- /* Reset the EMAC */
- out_be32(&emacp->em0mr0, EMAC_M0_SRST);
- udelay(20);
- for (i = 0; i < 100; i++) {
- if ((in_be32(&emacp->em0mr0) & EMAC_M0_SRST) == 0)
- break;
- udelay(10);
- }
-
- if (i >= 100) {
- printk(KERN_ERR "%s: Cannot reset EMAC\n",
- fep->ndev->name);
- return;
- }
- }
-
- /* Switch IRQs off for now */
- out_be32(&emacp->em0iser, 0);
-
- /* Configure MAL rx channel */
- mal_set_rcbs(fep->mal, fep->mal_rx_chan, DESC_BUF_SIZE_REG);
-
- /* set the high address */
- out_be32(&emacp->em0iahr,
- (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
-
- /* set the low address */
- out_be32(&emacp->em0ialr,
- (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
- | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
-
- /* Adjust to link */
- if (netif_carrier_ok(fep->ndev))
- emac_adjust_to_link(fep);
-
- /* enable broadcast/individual address and RX FIFO defaults */
- out_be32(&emacp->em0rmr, EMAC_RMR_DEFAULT);
-
- /* set transmit request threshold register */
- out_be32(&emacp->em0trtr, EMAC_TRTR_DEFAULT);
-
- /* Reconfigure multicast */
- __emac_set_multicast_list(fep->ndev);
-
- /* Set receiver/transmitter defaults */
- out_be32(&emacp->em0rwmr, EMAC_RWMR_DEFAULT);
- out_be32(&emacp->em0tmr0, EMAC_TMR0_DEFAULT);
- out_be32(&emacp->em0tmr1, EMAC_TMR1_DEFAULT);
-
- /* set frame gap */
- out_be32(&emacp->em0ipgvr, CONFIG_IBM_EMAC_FGAP);
-
- /* Init ring buffers */
- emac_init_rings(fep->ndev);
-}
-
-static void emac_kick(struct ocp_enet_private *fep)
-{
- emac_t *emacp = fep->emacp;
- unsigned long emac_ier;
-
- emac_ier = EMAC_ISR_PP | EMAC_ISR_BP | EMAC_ISR_RP |
- EMAC_ISR_SE | EMAC_ISR_PTLE | EMAC_ISR_ALE |
- EMAC_ISR_BFCS | EMAC_ISR_ORE | EMAC_ISR_IRE;
-
- out_be32(&emacp->em0iser, emac_ier);
-
- /* enable all MAL transmit and receive channels */
- mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
- mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
-
- /* set transmit and receive enable */
- out_be32(&emacp->em0mr0, EMAC_M0_TXE | EMAC_M0_RXE);
-}
-
-static void
-emac_start_link(struct ocp_enet_private *fep, struct ethtool_cmd *ep)
-{
- u32 advertise;
- int autoneg;
- int forced_speed;
- int forced_duplex;
-
- /* Default advertise */
- advertise = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
- ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full |
- ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full;
- autoneg = fep->want_autoneg;
- forced_speed = fep->phy_mii.speed;
- forced_duplex = fep->phy_mii.duplex;
-
- /* Setup link parameters */
- if (ep) {
- if (ep->autoneg == AUTONEG_ENABLE) {
- advertise = ep->advertising;
- autoneg = 1;
- } else {
- autoneg = 0;
- forced_speed = ep->speed;
- forced_duplex = ep->duplex;
- }
- }
-
- /* Configure PHY & start aneg */
- fep->want_autoneg = autoneg;
- if (autoneg) {
- LINK_DEBUG(("%s: start link aneg, advertise: 0x%x\n",
- fep->ndev->name, advertise));
- fep->phy_mii.def->ops->setup_aneg(&fep->phy_mii, advertise);
- } else {
- LINK_DEBUG(("%s: start link forced, speed: %d, duplex: %d\n",
- fep->ndev->name, forced_speed, forced_duplex));
- fep->phy_mii.def->ops->setup_forced(&fep->phy_mii, forced_speed,
- forced_duplex);
- }
- fep->timer_ticks = 0;
- mod_timer(&fep->link_timer, jiffies + HZ);
-}
-
-static void emac_link_timer(unsigned long data)
-{
- struct ocp_enet_private *fep = (struct ocp_enet_private *)data;
- int link;
-
- if (fep->going_away)
- return;
-
- spin_lock_irq(&fep->lock);
-
- link = fep->phy_mii.def->ops->poll_link(&fep->phy_mii);
- LINK_DEBUG(("%s: poll_link: %d\n", fep->ndev->name, link));
-
- if (link == netif_carrier_ok(fep->ndev)) {
- if (!link && fep->want_autoneg && (++fep->timer_ticks) > 10)
- emac_start_link(fep, NULL);
- goto out;
- }
- printk(KERN_INFO "%s: Link is %s\n", fep->ndev->name,
- link ? "Up" : "Down");
- if (link) {
- netif_carrier_on(fep->ndev);
- /* Chip needs a full reset on config change. That sucks, so I
- * should ultimately move that to some tasklet to limit
- * latency peaks caused by this code
- */
- emac_reset_configure(fep);
- if (fep->opened)
- emac_kick(fep);
- } else {
- fep->timer_ticks = 0;
- netif_carrier_off(fep->ndev);
- }
- out:
- mod_timer(&fep->link_timer, jiffies + HZ);
- spin_unlock_irq(&fep->lock);
-}
-
-static void emac_set_multicast_list(struct net_device *dev)
-{
- struct ocp_enet_private *fep = dev->priv;
-
- spin_lock_irq(&fep->lock);
- __emac_set_multicast_list(dev);
- spin_unlock_irq(&fep->lock);
-}
-
-static int emac_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
-{
- struct ocp_enet_private *fep = ndev->priv;
-
- cmd->supported = fep->phy_mii.def->features;
- cmd->port = PORT_MII;
- cmd->transceiver = XCVR_EXTERNAL;
- cmd->phy_address = fep->mii_phy_addr;
- spin_lock_irq(&fep->lock);
- cmd->autoneg = fep->want_autoneg;
- cmd->speed = fep->phy_mii.speed;
- cmd->duplex = fep->phy_mii.duplex;
- spin_unlock_irq(&fep->lock);
- return 0;
-}
-
-static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
-{
- struct ocp_enet_private *fep = ndev->priv;
- unsigned long features = fep->phy_mii.def->features;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
- return -EINVAL;
- if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
- return -EINVAL;
- if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
- return -EINVAL;
- if (cmd->autoneg == AUTONEG_DISABLE)
- switch (cmd->speed) {
- case SPEED_10:
- if (cmd->duplex == DUPLEX_HALF &&
- (features & SUPPORTED_10baseT_Half) == 0)
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL &&
- (features & SUPPORTED_10baseT_Full) == 0)
- return -EINVAL;
- break;
- case SPEED_100:
- if (cmd->duplex == DUPLEX_HALF &&
- (features & SUPPORTED_100baseT_Half) == 0)
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL &&
- (features & SUPPORTED_100baseT_Full) == 0)
- return -EINVAL;
- break;
- case SPEED_1000:
- if (cmd->duplex == DUPLEX_HALF &&
- (features & SUPPORTED_1000baseT_Half) == 0)
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL &&
- (features & SUPPORTED_1000baseT_Full) == 0)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- } else if ((features & SUPPORTED_Autoneg) == 0)
- return -EINVAL;
- spin_lock_irq(&fep->lock);
- emac_start_link(fep, cmd);
- spin_unlock_irq(&fep->lock);
- return 0;
-}
-
-static void
-emac_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
-{
- struct ocp_enet_private *fep = ndev->priv;
-
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- info->fw_version[0] = '\0';
- sprintf(info->bus_info, "IBM EMAC %d", fep->ocpdev->def->index);
- info->regdump_len = 0;
-}
-
-static int emac_nway_reset(struct net_device *ndev)
-{
- struct ocp_enet_private *fep = ndev->priv;
-
- if (!fep->want_autoneg)
- return -EINVAL;
- spin_lock_irq(&fep->lock);
- emac_start_link(fep, NULL);
- spin_unlock_irq(&fep->lock);
- return 0;
-}
-
-static u32 emac_get_link(struct net_device *ndev)
-{
- return netif_carrier_ok(ndev);
-}
-
-static struct ethtool_ops emac_ethtool_ops = {
- .get_settings = emac_get_settings,
- .set_settings = emac_set_settings,
- .get_drvinfo = emac_get_drvinfo,
- .nway_reset = emac_nway_reset,
- .get_link = emac_get_link
-};
-
-static int emac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- struct ocp_enet_private *fep = dev->priv;
- uint *data = (uint *) & rq->ifr_data;
-
- switch (cmd) {
- case SIOCGMIIPHY:
- data[0] = fep->mii_phy_addr;
- /* Fall through */
- case SIOCGMIIREG:
- data[3] = emac_phy_read(dev, fep->mii_phy_addr, data[1]);
- return 0;
- case SIOCSMIIREG:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- emac_phy_write(dev, fep->mii_phy_addr, data[1], data[2]);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static int emac_open(struct net_device *dev)
-{
- struct ocp_enet_private *fep = dev->priv;
- int rc;
-
- spin_lock_irq(&fep->lock);
-
- fep->opened = 1;
- netif_carrier_off(dev);
-
- /* Reset & configure the chip */
- emac_reset_configure(fep);
-
- spin_unlock_irq(&fep->lock);
-
- /* Request our interrupt lines */
- rc = request_irq(dev->irq, emac_mac_irq, 0, "IBM EMAC MAC", dev);
- if (rc != 0) {
- printk("dev->irq %d failed\n", dev->irq);
- goto bail;
- }
- /* Kick the chip rx & tx channels into life */
- spin_lock_irq(&fep->lock);
- emac_kick(fep);
- spin_unlock_irq(&fep->lock);
-
- netif_start_queue(dev);
- bail:
- return rc;
-}
-
-static int emac_close(struct net_device *dev)
-{
- struct ocp_enet_private *fep = dev->priv;
- emac_t *emacp = fep->emacp;
-
- /* XXX Stop IRQ emitting here */
- spin_lock_irq(&fep->lock);
- fep->opened = 0;
- mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
- mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
- netif_carrier_off(dev);
- netif_stop_queue(dev);
-
- /*
- * Check for a link, some PHYs don't provide a clock if
- * no link is present. Some EMACs will not come out of
- * soft reset without a PHY clock present.
- */
- if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
- out_be32(&emacp->em0mr0, EMAC_M0_SRST);
- udelay(10);
-
- if (emacp->em0mr0 & EMAC_M0_SRST) {
- /*not sure what to do here hopefully it clears before another open */
- printk(KERN_ERR
- "%s: Phy SoftReset didn't clear, no link?\n",
- dev->name);
- }
- }
-
- /* Free the irq's */
- free_irq(dev->irq, dev);
-
- spin_unlock_irq(&fep->lock);
-
- return 0;
-}
-
-static void emac_remove(struct ocp_device *ocpdev)
-{
- struct net_device *dev = ocp_get_drvdata(ocpdev);
- struct ocp_enet_private *ep = dev->priv;
-
- /* FIXME: locking, races, ... */
- ep->going_away = 1;
- ocp_set_drvdata(ocpdev, NULL);
- if (ep->rgmii_dev)
- emac_close_rgmii(ep->rgmii_dev);
- if (ep->zmii_dev)
- emac_close_zmii(ep->zmii_dev);
-
- unregister_netdev(dev);
- del_timer_sync(&ep->link_timer);
- mal_unregister_commac(ep->mal, &ep->commac);
- iounmap((void *)ep->emacp);
- kfree(dev);
-}
-
-struct mal_commac_ops emac_commac_ops = {
- .txeob = &emac_txeob_dev,
- .txde = &emac_txde_dev,
- .rxeob = &emac_rxeob_dev,
- .rxde = &emac_rxde_dev,
-};
-
-static int emac_init_device(struct ocp_device *ocpdev, struct ibm_ocp_mal *mal)
-{
- int deferred_init = 0;
- int rc = 0, i;
- struct net_device *ndev;
- struct ocp_enet_private *ep;
- struct ocp_func_emac_data *emacdata;
- int commac_reg = 0;
- u32 phy_map;
-
- emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
- if (!emacdata) {
- printk(KERN_ERR "emac%d: Missing additional data!\n",
- ocpdev->def->index);
- return -ENODEV;
- }
-
- /* Allocate our net_device structure */
- ndev = alloc_etherdev(sizeof(struct ocp_enet_private));
- if (ndev == NULL) {
- printk(KERN_ERR
- "emac%d: Could not allocate ethernet device.\n",
- ocpdev->def->index);
- return -ENOMEM;
- }
- ep = ndev->priv;
- ep->ndev = ndev;
- ep->ocpdev = ocpdev;
- ndev->irq = ocpdev->def->irq;
- ep->wol_irq = emacdata->wol_irq;
- if (emacdata->mdio_idx >= 0) {
- if (emacdata->mdio_idx == ocpdev->def->index) {
- /* Set the common MDIO net_device */
- mdio_ndev = ndev;
- deferred_init = 1;
- }
- ep->mdio_dev = mdio_ndev;
- } else {
- ep->mdio_dev = ndev;
- }
-
- ocp_set_drvdata(ocpdev, ndev);
-
- spin_lock_init(&ep->lock);
-
- /* Fill out MAL informations and register commac */
- ep->mal = mal;
- ep->mal_tx_chan = emacdata->mal_tx_chan;
- ep->mal_rx_chan = emacdata->mal_rx_chan;
- ep->commac.ops = &emac_commac_ops;
- ep->commac.dev = ndev;
- ep->commac.tx_chan_mask = MAL_CHAN_MASK(ep->mal_tx_chan);
- ep->commac.rx_chan_mask = MAL_CHAN_MASK(ep->mal_rx_chan);
- rc = mal_register_commac(ep->mal, &ep->commac);
- if (rc != 0)
- goto bail;
- commac_reg = 1;
-
- /* Map our MMIOs */
- ep->emacp = (emac_t *) ioremap(ocpdev->def->paddr, sizeof(emac_t));
-
- /* Check if we need to attach to a ZMII */
- if (emacdata->zmii_idx >= 0) {
- ep->zmii_input = emacdata->zmii_mux;
- ep->zmii_dev =
- ocp_find_device(OCP_ANY_ID, OCP_FUNC_ZMII,
- emacdata->zmii_idx);
- if (ep->zmii_dev == NULL)
- printk(KERN_WARNING
- "emac%d: ZMII %d requested but not found !\n",
- ocpdev->def->index, emacdata->zmii_idx);
- else if ((rc =
- emac_init_zmii(ep->zmii_dev, ep->zmii_input,
- emacdata->phy_mode)) != 0)
- goto bail;
- }
-
- /* Check if we need to attach to a RGMII */
- if (emacdata->rgmii_idx >= 0) {
- ep->rgmii_input = emacdata->rgmii_mux;
- ep->rgmii_dev =
- ocp_find_device(OCP_ANY_ID, OCP_FUNC_RGMII,
- emacdata->rgmii_idx);
- if (ep->rgmii_dev == NULL)
- printk(KERN_WARNING
- "emac%d: RGMII %d requested but not found !\n",
- ocpdev->def->index, emacdata->rgmii_idx);
- else if ((rc =
- emac_init_rgmii(ep->rgmii_dev, ep->rgmii_input,
- emacdata->phy_mode)) != 0)
- goto bail;
- }
-
- /* Check if we need to attach to a TAH */
- if (emacdata->tah_idx >= 0) {
- ep->tah_dev =
- ocp_find_device(OCP_ANY_ID, OCP_FUNC_TAH,
- emacdata->tah_idx);
- if (ep->tah_dev == NULL)
- printk(KERN_WARNING
- "emac%d: TAH %d requested but not found !\n",
- ocpdev->def->index, emacdata->tah_idx);
- else if ((rc = emac_init_tah(ep)) != 0)
- goto bail;
- }
-
- if (deferred_init) {
- if (!list_empty(&emac_init_list)) {
- struct list_head *entry;
- struct emac_def_dev *ddev;
-
- list_for_each(entry, &emac_init_list) {
- ddev =
- list_entry(entry, struct emac_def_dev,
- link);
- emac_init_device(ddev->ocpdev, ddev->mal);
- }
- }
- }
-
- /* Init link monitoring timer */
- init_timer(&ep->link_timer);
- ep->link_timer.function = emac_link_timer;
- ep->link_timer.data = (unsigned long)ep;
- ep->timer_ticks = 0;
-
- /* Fill up the mii_phy structure */
- ep->phy_mii.dev = ndev;
- ep->phy_mii.mdio_read = emac_phy_read;
- ep->phy_mii.mdio_write = emac_phy_write;
- ep->phy_mii.mode = emacdata->phy_mode;
-
- /* Find PHY */
- phy_map = emacdata->phy_map | busy_phy_map;
- for (i = 0; i <= 0x1f; i++, phy_map >>= 1) {
- if ((phy_map & 0x1) == 0) {
- int val = emac_phy_read(ndev, i, MII_BMCR);
- if (val != 0xffff && val != -1)
- break;
- }
- }
- if (i == 0x20) {
- printk(KERN_WARNING "emac%d: Can't find PHY.\n",
- ocpdev->def->index);
- rc = -ENODEV;
- goto bail;
- }
- busy_phy_map |= 1 << i;
- ep->mii_phy_addr = i;
- rc = mii_phy_probe(&ep->phy_mii, i);
- if (rc) {
- printk(KERN_WARNING "emac%d: Failed to probe PHY type.\n",
- ocpdev->def->index);
- rc = -ENODEV;
- goto bail;
- }
-
- /* Setup initial PHY config & startup aneg */
- if (ep->phy_mii.def->ops->init)
- ep->phy_mii.def->ops->init(&ep->phy_mii);
- netif_carrier_off(ndev);
- if (ep->phy_mii.def->features & SUPPORTED_Autoneg)
- ep->want_autoneg = 1;
- emac_start_link(ep, NULL);
-
- /* read the MAC Address */
- for (i = 0; i < 6; i++)
- ndev->dev_addr[i] = emacdata->mac_addr[i];
-
- /* Fill in the driver function table */
- ndev->open = &emac_open;
- ndev->hard_start_xmit = &emac_start_xmit;
- ndev->stop = &emac_close;
- ndev->get_stats = &emac_stats;
- if (emacdata->jumbo)
- ndev->change_mtu = &emac_change_mtu;
- ndev->set_mac_address = &emac_set_mac_address;
- ndev->set_multicast_list = &emac_set_multicast_list;
- ndev->do_ioctl = &emac_ioctl;
- SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
- if (emacdata->tah_idx >= 0)
- ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG;
-
- SET_MODULE_OWNER(ndev);
-
- rc = register_netdev(ndev);
- if (rc != 0)
- goto bail;
-
- printk("%s: IBM emac, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
- ndev->name,
- ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
- ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
- printk(KERN_INFO "%s: Found %s PHY (0x%02x)\n",
- ndev->name, ep->phy_mii.def->name, ep->mii_phy_addr);
-
- bail:
- if (rc && commac_reg)
- mal_unregister_commac(ep->mal, &ep->commac);
- if (rc && ndev)
- kfree(ndev);
-
- return rc;
-}
-
-static int emac_probe(struct ocp_device *ocpdev)
-{
- struct ocp_device *maldev;
- struct ibm_ocp_mal *mal;
- struct ocp_func_emac_data *emacdata;
-
- emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
- if (emacdata == NULL) {
- printk(KERN_ERR "emac%d: Missing additional datas !\n",
- ocpdev->def->index);
- return -ENODEV;
- }
-
- /* Get the MAL device */
- maldev = ocp_find_device(OCP_ANY_ID, OCP_FUNC_MAL, emacdata->mal_idx);
- if (maldev == NULL) {
- printk("No maldev\n");
- return -ENODEV;
- }
- /*
- * Get MAL driver data, it must be here due to link order.
- * When the driver is modularized, symbol dependencies will
- * ensure the MAL driver is already present if built as a
- * module.
- */
- mal = (struct ibm_ocp_mal *)ocp_get_drvdata(maldev);
- if (mal == NULL) {
- printk("No maldrv\n");
- return -ENODEV;
- }
-
- /* If we depend on another EMAC for MDIO, wait for it to show up */
- if (emacdata->mdio_idx >= 0 &&
- (emacdata->mdio_idx != ocpdev->def->index) && !mdio_ndev) {
- struct emac_def_dev *ddev;
- /* Add this index to the deferred init table */
- ddev = kmalloc(sizeof(struct emac_def_dev), GFP_KERNEL);
- ddev->ocpdev = ocpdev;
- ddev->mal = mal;
- list_add_tail(&ddev->link, &emac_init_list);
- } else {
- emac_init_device(ocpdev, mal);
- }
-
- return 0;
-}
-
-/* Structure for a device driver */
-static struct ocp_device_id emac_ids[] = {
- {.vendor = OCP_ANY_ID,.function = OCP_FUNC_EMAC},
- {.vendor = OCP_VENDOR_INVALID}
-};
-
-static struct ocp_driver emac_driver = {
- .name = "emac",
- .id_table = emac_ids,
-
- .probe = emac_probe,
- .remove = emac_remove,
-};
-
-static int __init emac_init(void)
-{
- int rc;
-
- printk(KERN_INFO DRV_NAME ": " DRV_DESC ", version " DRV_VERSION "\n");
- printk(KERN_INFO "Maintained by " DRV_AUTHOR "\n");
-
- if (skb_res > 2) {
- printk(KERN_WARNING "Invalid skb_res: %d, cropping to 2\n",
- skb_res);
- skb_res = 2;
- }
- rc = ocp_register_driver(&emac_driver);
- if (rc < 0) {
- ocp_unregister_driver(&emac_driver);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static void __exit emac_exit(void)
-{
- ocp_unregister_driver(&emac_driver);
-}
-
-module_init(emac_init);
-module_exit(emac_exit);
+++ /dev/null
-
-/*
- * ibm_emac_phy.h
- *
- *
- * Benjamin Herrenschmidt <benh@kernel.crashing.org>
- * February 2003
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- * This file basically duplicates sungem_phy.{c,h} with different PHYs
- * supported. I'm looking into merging that in a single mii layer more
- * flexible than mii.c
- */
-
-#ifndef _IBM_EMAC_PHY_H_
-#define _IBM_EMAC_PHY_H_
-
-/*
- * PHY mode settings
- * Used for multi-mode capable PHYs
- */
-#define PHY_MODE_NA 0
-#define PHY_MODE_MII 1
-#define PHY_MODE_RMII 2
-#define PHY_MODE_SMII 3
-#define PHY_MODE_RGMII 4
-#define PHY_MODE_TBI 5
-#define PHY_MODE_GMII 6
-#define PHY_MODE_RTBI 7
-#define PHY_MODE_SGMII 8
-
-/*
- * PHY specific registers/values
- */
-
-/* CIS8201 */
-#define MII_CIS8201_EPCR 0x17
-#define EPCR_MODE_MASK 0x3000
-#define EPCR_GMII_MODE 0x0000
-#define EPCR_RGMII_MODE 0x1000
-#define EPCR_TBI_MODE 0x2000
-#define EPCR_RTBI_MODE 0x3000
-
-struct mii_phy;
-
-/* Operations supported by any kind of PHY */
-struct mii_phy_ops {
- int (*init) (struct mii_phy * phy);
- int (*suspend) (struct mii_phy * phy, int wol_options);
- int (*setup_aneg) (struct mii_phy * phy, u32 advertise);
- int (*setup_forced) (struct mii_phy * phy, int speed, int fd);
- int (*poll_link) (struct mii_phy * phy);
- int (*read_link) (struct mii_phy * phy);
-};
-
-/* Structure used to statically define an mii/gii based PHY */
-struct mii_phy_def {
- u32 phy_id; /* Concatenated ID1 << 16 | ID2 */
- u32 phy_id_mask; /* Significant bits */
- u32 features; /* Ethtool SUPPORTED_* defines */
- int magic_aneg; /* Autoneg does all speed test for us */
- const char *name;
- const struct mii_phy_ops *ops;
-};
-
-/* An instance of a PHY, partially borrowed from mii_if_info */
-struct mii_phy {
- struct mii_phy_def *def;
- int advertising;
- int mii_id;
-
- /* 1: autoneg enabled, 0: disabled */
- int autoneg;
-
- /* forced speed & duplex (no autoneg)
- * partner speed & duplex & pause (autoneg)
- */
- int speed;
- int duplex;
- int pause;
-
- /* PHY mode - if needed */
- int mode;
-
- /* Provided by host chip */
- struct net_device *dev;
- int (*mdio_read) (struct net_device * dev, int mii_id, int reg);
- void (*mdio_write) (struct net_device * dev, int mii_id, int reg,
- int val);
-};
-
-/* Pass in a struct mii_phy with dev, mdio_read and mdio_write
- * filled, the remaining fields will be filled on return
- */
-extern int mii_phy_probe(struct mii_phy *phy, int mii_id);
-
-static inline int __phy_read(struct mii_phy *phy, int id, int reg)
-{
- return phy->mdio_read(phy->dev, id, reg);
-}
-
-static inline void __phy_write(struct mii_phy *phy, int id, int reg, int val)
-{
- phy->mdio_write(phy->dev, id, reg, val);
-}
-
-static inline int phy_read(struct mii_phy *phy, int reg)
-{
- return phy->mdio_read(phy->dev, phy->mii_id, reg);
-}
-
-static inline void phy_write(struct mii_phy *phy, int reg, int val)
-{
- phy->mdio_write(phy->dev, phy->mii_id, reg, val);
-}
-
-#endif /* _IBM_EMAC_PHY_H_ */
+++ /dev/null
-static u8 firmware[]={
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-};
+++ /dev/null
-/*======================================================================
-
- Device driver for the PCMCIA control functionality of PXA2xx
- microprocessors.
-
- The contents of this file may be used under the
- terms of the GNU Public License version 2 (the "GPL")
-
- (c) Ian Molton (spyro@f2s.com) 2003
- (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
-
- derived from sa11xx_base.c
-
- Portions created by John G. Dorsey are
- Copyright (C) 1999 John G. Dorsey.
-
- ======================================================================*/
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/config.h>
-#include <linux/cpufreq.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/notifier.h>
-#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-
-#include <pcmcia/cs_types.h>
-#include <pcmcia/ss.h>
-#include <pcmcia/bulkmem.h>
-#include <pcmcia/cistpl.h>
-
-#include "cs_internal.h"
-#include "soc_common.h"
-#include "pxa2xx_base.h"
-
-
-#define MCXX_SETUP_MASK (0x7f)
-#define MCXX_ASST_MASK (0x1f)
-#define MCXX_HOLD_MASK (0x3f)
-#define MCXX_SETUP_SHIFT (0)
-#define MCXX_ASST_SHIFT (7)
-#define MCXX_HOLD_SHIFT (14)
-
-static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz)
-{
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
-}
-
-static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz)
-{
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
-}
-
-static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
- u_int mem_clk_10khz)
-{
- u_int code = pcmcia_cycle_ns * mem_clk_10khz;
- return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
-}
-
-/* This function returns the (approximate) command assertion period, in
- * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
- */
-static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
- u_int pcmcia_mcxx_asst)
-{
- return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
-}
-
-static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
-{
- MCMEM(sock) = ((pxa2xx_mcxx_setup(speed, clock)
- & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
- | ((pxa2xx_mcxx_asst(speed, clock)
- & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
- | ((pxa2xx_mcxx_hold(speed, clock)
- & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
-
- return 0;
-}
-
-static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
-{
- MCIO(sock) = ((pxa2xx_mcxx_setup(speed, clock)
- & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
- | ((pxa2xx_mcxx_asst(speed, clock)
- & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
- | ((pxa2xx_mcxx_hold(speed, clock)
- & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
-
- return 0;
-}
-
-static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
-{
- MCATT(sock) = ((pxa2xx_mcxx_setup(speed, clock)
- & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
- | ((pxa2xx_mcxx_asst(speed, clock)
- & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
- | ((pxa2xx_mcxx_hold(speed, clock)
- & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
-
- return 0;
-}
-
-static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int lclk)
-{
- struct soc_pcmcia_timing timing;
- int sock = skt->nr;
-
- soc_common_pcmcia_get_timing(skt, &timing);
-
- pxa2xx_pcmcia_set_mcmem(sock, timing.mem, lclk);
- pxa2xx_pcmcia_set_mcatt(sock, timing.attr, lclk);
- pxa2xx_pcmcia_set_mcio(sock, timing.io, lclk);
-
- return 0;
-}
-
-static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
-{
- unsigned int lclk = get_lclk_frequency_10khz();
- return pxa2xx_pcmcia_set_mcxx(skt, lclk);
-}
-
-int pxa2xx_drv_pcmcia_probe(struct device *dev)
-{
- int ret;
- struct pcmcia_low_level *ops;
- int first, nr;
-
- if (!dev || !dev->platform_data)
- return -ENODEV;
-
- ops = (struct pcmcia_low_level *)dev->platform_data;
- first = ops->first;
- nr = ops->nr;
-
- /* Setup GPIOs for PCMCIA/CF alternate function mode.
- *
- * It would be nice if set_GPIO_mode included support
- * for driving GPIO outputs to default high/low state
- * before programming GPIOs as outputs. Setting GPIO
- * outputs to default high/low state via GPSR/GPCR
- * before defining them as outputs should reduce
- * the possibility of glitching outputs during GPIO
- * setup. This of course assumes external terminators
- * are present to hold GPIOs in a defined state.
- *
- * In the meantime, setup default state of GPIO
- * outputs before we enable them as outputs.
- */
-
- GPSR(GPIO48_nPOE) = GPIO_bit(GPIO48_nPOE) |
- GPIO_bit(GPIO49_nPWE) |
- GPIO_bit(GPIO50_nPIOR) |
- GPIO_bit(GPIO51_nPIOW) |
- GPIO_bit(GPIO52_nPCE_1) |
- GPIO_bit(GPIO53_nPCE_2);
-
- pxa_gpio_mode(GPIO48_nPOE_MD);
- pxa_gpio_mode(GPIO49_nPWE_MD);
- pxa_gpio_mode(GPIO50_nPIOR_MD);
- pxa_gpio_mode(GPIO51_nPIOW_MD);
- pxa_gpio_mode(GPIO52_nPCE_1_MD);
- pxa_gpio_mode(GPIO53_nPCE_2_MD);
- pxa_gpio_mode(GPIO54_pSKTSEL_MD); /* REVISIT: s/b dependent on num sockets */
- pxa_gpio_mode(GPIO55_nPREG_MD);
- pxa_gpio_mode(GPIO56_nPWAIT_MD);
- pxa_gpio_mode(GPIO57_nIOIS16_MD);
-
- /* Provide our PXA2xx specific timing routines. */
- ops->set_timing = pxa2xx_pcmcia_set_timing;
-
- ret = soc_common_drv_pcmcia_probe(dev, ops, first, nr);
-
- if (ret == 0) {
- /*
- * We have at least one socket, so set MECR:CIT
- * (Card Is There)
- */
- MECR |= MECR_CIT;
-
- /* Set MECR:NOS (Number Of Sockets) */
- if (nr > 1)
- MECR |= MECR_NOS;
- else
- MECR &= ~MECR_NOS;
- }
-
- return ret;
-}
-EXPORT_SYMBOL(pxa2xx_drv_pcmcia_probe);
-
-static int pxa2xx_drv_pcmcia_suspend(struct device *dev, u32 state, u32 level)
-{
- int ret = 0;
- if (level == SUSPEND_SAVE_STATE)
- ret = pcmcia_socket_dev_suspend(dev, state);
- return ret;
-}
-
-static int pxa2xx_drv_pcmcia_resume(struct device *dev, u32 level)
-{
- int ret = 0;
- if (level == RESUME_RESTORE_STATE)
- ret = pcmcia_socket_dev_resume(dev);
- return ret;
-}
-
-static struct device_driver pxa2xx_pcmcia_driver = {
- .probe = pxa2xx_drv_pcmcia_probe,
- .remove = soc_common_drv_pcmcia_remove,
- .suspend = pxa2xx_drv_pcmcia_suspend,
- .resume = pxa2xx_drv_pcmcia_resume,
- .name = "pxa2xx-pcmcia",
- .bus = &platform_bus_type,
-};
-
-#ifdef CONFIG_CPU_FREQ
-
-/*
- * When pxa2xx_pcmcia_notifier() decides that a MC{IO,MEM,ATT} adjustment (due
- * to a core clock frequency change) is needed, this routine establishes
- * new values consistent with the clock speed `clock'.
- */
-static void pxa2xx_pcmcia_update_mcxx(unsigned int clock)
-{
- struct soc_pcmcia_socket *skt;
-
- down(&soc_sockets_lock);
- list_for_each_entry(skt, &soc_sockets, node) {
- pxa2xx_pcmcia_set_mcxx(skt, clock);
- }
- up(&soc_sockets_lock);
-}
-
-/*
- * When changing the processor L clock frequency, it is necessary
- * to adjust the MCXX timings accordingly. We've recorded the timings
- * requested by Card Services, so this is just a matter of finding
- * out what our current speed is, and then recomputing the new MCXX
- * values.
- *
- * Returns: 0 on success, -1 on error
- */
-static int
-pxa2xx_pcmcia_notifier(struct notifier_block *nb, unsigned long val, void *data)
-{
- struct cpufreq_freqs *freqs = data;
-
-#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
- switch (val) {
- case CPUFREQ_PRECHANGE:
- if (freqs->new > freqs->old) {
- debug( 2, "new frequency %u.%uMHz > %u.%uMHz, "
- "pre-updating\n",
- freqs->new / 1000, (freqs->new / 100) % 10,
- freqs->old / 1000, (freqs->old / 100) % 10);
- pxa2xx_pcmcia_update_mcxx(freqs->new);
- }
- break;
-
- case CPUFREQ_POSTCHANGE:
- if (freqs->new < freqs->old) {
- debug( 2, "new frequency %u.%uMHz < %u.%uMHz, "
- "post-updating\n",
- freqs->new / 1000, (freqs->new / 100) % 10,
- freqs->old / 1000, (freqs->old / 100) % 10);
- pxa2xx_pcmcia_update_mcxx(freqs->new);
- }
- break;
- }
-
- return 0;
-}
-
-static struct notifier_block pxa2xx_pcmcia_notifier_block = {
- .notifier_call = pxa2xx_pcmcia_notifier
-};
-
-static int __init pxa2xx_pcmcia_cpufreq_init(void)
-{
- int ret;
-
- ret = cpufreq_register_notifier(&pxa2xx_pcmcia_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
- if (ret < 0)
- printk(KERN_ERR "Unable to register CPU frequency change "
- "notifier for PCMCIA (%d)\n", ret);
- return ret;
-}
-
-static void __exit pxa2xx_pcmcia_cpufreq_exit(void)
-{
- cpufreq_unregister_notifier(&pxa2xx_pcmcia_notifier_block, CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-#else
-#define pxa2xx_pcmcia_cpufreq_init()
-#define pxa2xx_pcmcia_cpufreq_exit()
-#endif
-
-static int __init pxa2xx_pcmcia_init(void)
-{
- int ret = driver_register(&pxa2xx_pcmcia_driver);
- if (ret == 0)
- pxa2xx_pcmcia_cpufreq_init();
- return ret;
-}
-
-static void __exit pxa2xx_pcmcia_exit(void)
-{
- pxa2xx_pcmcia_cpufreq_exit();
- driver_unregister(&pxa2xx_pcmcia_driver);
-}
-
-module_init(pxa2xx_pcmcia_init);
-module_exit(pxa2xx_pcmcia_exit);
-
-MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
-MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * linux/drivers/pcmcia/pxa2xx_lubbock.c
- *
- * Author: George Davis
- * Created: Jan 10, 2002
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
- *
- * Lubbock PCMCIA specific routines.
- *
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-
-#include <asm/hardware.h>
-#include <asm/hardware/sa1111.h>
-#include <asm/mach-types.h>
-
-#include "sa1111_generic.h"
-
-static int
-lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
- const socket_state_t *state)
-{
- unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
- int ret = 0;
-
- pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
-
- /* Lubbock uses the Maxim MAX1602, with the following connections:
- *
- * Socket 0 (PCMCIA):
- * MAX1602 Lubbock Register
- * Pin Signal
- * ----- ------- ----------------------
- * A0VPP S0_PWR0 SA-1111 GPIO A<0>
- * A1VPP S0_PWR1 SA-1111 GPIO A<1>
- * A0VCC S0_PWR2 SA-1111 GPIO A<2>
- * A1VCC S0_PWR3 SA-1111 GPIO A<3>
- * VX VCC
- * VY +3.3V
- * 12IN +12V
- * CODE +3.3V Cirrus Code, CODE = High (VY)
- *
- * Socket 1 (CF):
- * MAX1602 Lubbock Register
- * Pin Signal
- * ----- ------- ----------------------
- * A0VPP GND VPP is not connected
- * A1VPP GND VPP is not connected
- * A0VCC S1_PWR0 MISC_WR<14>
- * A1VCC S1_PWR1 MISC_WR<15>
- * VX VCC
- * VY +3.3V
- * 12IN GND VPP is not connected
- * CODE +3.3V Cirrus Code, CODE = High (VY)
- *
- */
-
- again:
- switch (skt->nr) {
- case 0:
- pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
-
- switch (state->Vcc) {
- case 0: /* Hi-Z */
- break;
-
- case 33: /* VY */
- pa_dwr_set |= GPIO_A3;
- break;
-
- case 50: /* VX */
- pa_dwr_set |= GPIO_A2;
- break;
-
- default:
- printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
- __FUNCTION__, state->Vcc);
- ret = -1;
- }
-
- switch (state->Vpp) {
- case 0: /* Hi-Z */
- break;
-
- case 120: /* 12IN */
- pa_dwr_set |= GPIO_A1;
- break;
-
- default: /* VCC */
- if (state->Vpp == state->Vcc)
- pa_dwr_set |= GPIO_A0;
- else {
- printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
- __FUNCTION__, state->Vpp);
- ret = -1;
- break;
- }
- }
- break;
-
- case 1:
- misc_mask = (1 << 15) | (1 << 14);
-
- switch (state->Vcc) {
- case 0: /* Hi-Z */
- break;
-
- case 33: /* VY */
- misc_set |= 1 << 15;
- break;
-
- case 50: /* VX */
- misc_set |= 1 << 14;
- break;
-
- default:
- printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
- __FUNCTION__, state->Vcc);
- ret = -1;
- break;
- }
-
- if (state->Vpp != state->Vcc && state->Vpp != 0) {
- printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
- __FUNCTION__, state->Vpp);
- ret = -1;
- break;
- }
- break;
-
- default:
- ret = -1;
- }
-
- if (ret == 0)
- ret = sa1111_pcmcia_configure_socket(skt, state);
-
- if (ret == 0) {
- lubbock_set_misc_wr(misc_mask, misc_set);
- sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
- }
-
-#if 1
- if (ret == 0 && state->Vcc == 33) {
- struct pcmcia_state new_state;
-
- /*
- * HACK ALERT:
- * We can't sense the voltage properly on Lubbock before
- * actually applying some power to the socket (catch 22).
- * Resense the socket Voltage Sense pins after applying
- * socket power.
- *
- * Note: It takes about 2.5ms for the MAX1602 VCC output
- * to rise.
- */
- mdelay(3);
-
- sa1111_pcmcia_socket_state(skt, &new_state);
-
- if (!new_state.vs_3v && !new_state.vs_Xv) {
- /*
- * Switch to 5V, Configure socket with 5V voltage
- */
- lubbock_set_misc_wr(misc_mask, 0);
- sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, 0);
-
- /*
- * It takes about 100ms to turn off Vcc.
- */
- mdelay(100);
-
- /*
- * We need to hack around the const qualifier as
- * well to keep this ugly workaround localized and
- * not force it to the rest of the code. Barf bags
- * avaliable in the seat pocket in front of you!
- */
- ((socket_state_t *)state)->Vcc = 50;
- ((socket_state_t *)state)->Vpp = 50;
- goto again;
- }
- }
-#endif
-
- return ret;
-}
-
-static struct pcmcia_low_level lubbock_pcmcia_ops = {
- .owner = THIS_MODULE,
- .hw_init = sa1111_pcmcia_hw_init,
- .hw_shutdown = sa1111_pcmcia_hw_shutdown,
- .socket_state = sa1111_pcmcia_socket_state,
- .configure_socket = lubbock_pcmcia_configure_socket,
- .socket_init = sa1111_pcmcia_socket_init,
- .socket_suspend = sa1111_pcmcia_socket_suspend,
- .first = 0,
- .nr = 2,
-};
-
-#include "pxa2xx_base.h"
-
-int __init pcmcia_lubbock_init(struct sa1111_dev *sadev)
-{
- int ret = -ENODEV;
-
- if (machine_is_lubbock()) {
- /*
- * Set GPIO_A<3:0> to be outputs for the MAX1600,
- * and switch to standby mode.
- */
- sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
- sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
- sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
-
- /* Set CF Socket 1 power to standby mode. */
- lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
-
- sadev->dev.platform_data = &lubbock_pcmcia_ops;
- ret = pxa2xx_drv_pcmcia_probe(&sadev->dev);
- }
-
- return ret;
-}
+++ /dev/null
-/*
- * linux/drivers/pcmcia/pxa2xx_mainstone.c
- *
- * Mainstone PCMCIA specific routines.
- *
- * Created: May 12, 2004
- * Author: Nicolas Pitre
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-
-#include <pcmcia/ss.h>
-
-#include <asm/hardware.h>
-#include <asm/irq.h>
-
-#include "soc_common.h"
-
-
-static struct pcmcia_irqs irqs[] = {
- { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
- { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
- { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
- { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
-};
-
-static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
-{
- skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
- return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
-}
-
-static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
-{
- soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
-}
-
-static unsigned long mst_pcmcia_status[2];
-
-static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
- struct pcmcia_state *state)
-{
- unsigned long status, flip;
-
- status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
- flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
-
- /*
- * Workaround for STSCHG which can't be deasserted:
- * We therefore disable/enable corresponding IRQs
- * as needed to avoid IRQ locks.
- */
- if (flip) {
- mst_pcmcia_status[skt->nr] = status;
- if (status & MST_PCMCIA_nSTSCHG_BVD1)
- enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
- : MAINSTONE_S1_STSCHG_IRQ );
- else
- disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
- : MAINSTONE_S1_STSCHG_IRQ );
- }
-
- state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
- state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
- state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
- state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
- state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
- state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
- state->wrprot = 0; /* not available */
-}
-
-static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
- const socket_state_t *state)
-{
- unsigned long power = 0;
- int ret = 0;
-
- switch (state->Vcc) {
- case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
- case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
- case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
- default:
- printk(KERN_ERR "%s(): bad Vcc %u\n",
- __FUNCTION__, state->Vcc);
- ret = -1;
- }
-
- switch (state->Vpp) {
- case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
- case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
- default:
- if(state->Vpp == state->Vcc) {
- power |= MST_PCMCIA_PWR_VPP_VCC;
- } else {
- printk(KERN_ERR "%s(): bad Vpp %u\n",
- __FUNCTION__, state->Vpp);
- ret = -1;
- }
- }
-
- if (state->flags & SS_RESET)
- power |= MST_PCMCIA_RESET;
-
- switch (skt->nr) {
- case 0: MST_PCMCIA0 = power; break;
- case 1: MST_PCMCIA1 = power; break;
- default: ret = -1;
- }
-
- return ret;
-}
-
-static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
-{
-}
-
-static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
-{
-}
-
-static struct pcmcia_low_level mst_pcmcia_ops = {
- .owner = THIS_MODULE,
- .hw_init = mst_pcmcia_hw_init,
- .hw_shutdown = mst_pcmcia_hw_shutdown,
- .socket_state = mst_pcmcia_socket_state,
- .configure_socket = mst_pcmcia_configure_socket,
- .socket_init = mst_pcmcia_socket_init,
- .socket_suspend = mst_pcmcia_socket_suspend,
- .nr = 2,
-};
-
-static struct platform_device *mst_pcmcia_device;
-
-static int __init mst_pcmcia_init(void)
-{
- int ret;
-
- mst_pcmcia_device = kmalloc(sizeof(*mst_pcmcia_device), GFP_KERNEL);
- if (!mst_pcmcia_device)
- return -ENOMEM;
- memset(mst_pcmcia_device, 0, sizeof(*mst_pcmcia_device));
- mst_pcmcia_device->name = "pxa2xx-pcmcia";
- mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
-
- ret = platform_device_register(mst_pcmcia_device);
- if (ret)
- kfree(mst_pcmcia_device);
-
- return ret;
-}
-
-static void __exit mst_pcmcia_exit(void)
-{
- /*
- * This call is supposed to free our mst_pcmcia_device.
- * Unfortunately platform_device don't have a free method, and
- * we can't assume it's free of any reference at this point so we
- * can't free it either.
- */
- platform_device_unregister(mst_pcmcia_device);
-}
-
-module_init(mst_pcmcia_init);
-module_exit(mst_pcmcia_exit);
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*======================================================================
-
- Device driver for the PCMCIA control functionality of StrongARM
- SA-1100 microprocessors.
-
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
-
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
-
- The initial developer of the original code is John G. Dorsey
- <john+@cs.cmu.edu>. Portions created by John G. Dorsey are
- Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
-
- Alternatively, the contents of this file may be used under the
- terms of the GNU Public License version 2 (the "GPL"), in which
- case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
-======================================================================*/
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/config.h>
-#include <linux/cpufreq.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/notifier.h>
-#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-
-#include "soc_common.h"
-#include "sa11xx_base.h"
-
-
-/*
- * sa1100_pcmcia_default_mecr_timing
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- *
- * Calculate MECR clock wait states for given CPU clock
- * speed and command wait state. This function can be over-
- * written by a board specific version.
- *
- * The default is to simply calculate the BS values as specified in
- * the INTEL SA1100 development manual
- * "Expansion Memory (PCMCIA) Configuration Register (MECR)"
- * that's section 10.2.5 in _my_ version of the manual ;)
- */
-static unsigned int
-sa1100_pcmcia_default_mecr_timing(struct soc_pcmcia_socket *skt,
- unsigned int cpu_speed,
- unsigned int cmd_time)
-{
- return sa1100_pcmcia_mecr_bs(cmd_time, cpu_speed);
-}
-
-/* sa1100_pcmcia_set_mecr()
- * ^^^^^^^^^^^^^^^^^^^^^^^^
- *
- * set MECR value for socket <sock> based on this sockets
- * io, mem and attribute space access speed.
- * Call board specific BS value calculation to allow boards
- * to tweak the BS values.
- */
-static int
-sa1100_pcmcia_set_mecr(struct soc_pcmcia_socket *skt, unsigned int cpu_clock)
-{
- struct soc_pcmcia_timing timing;
- u32 mecr, old_mecr;
- unsigned long flags;
- unsigned int bs_io, bs_mem, bs_attr;
-
- soc_common_pcmcia_get_timing(skt, &timing);
-
- bs_io = skt->ops->get_timing(skt, cpu_clock, timing.io);
- bs_mem = skt->ops->get_timing(skt, cpu_clock, timing.mem);
- bs_attr = skt->ops->get_timing(skt, cpu_clock, timing.attr);
-
- local_irq_save(flags);
-
- old_mecr = mecr = MECR;
- MECR_FAST_SET(mecr, skt->nr, 0);
- MECR_BSIO_SET(mecr, skt->nr, bs_io);
- MECR_BSA_SET(mecr, skt->nr, bs_attr);
- MECR_BSM_SET(mecr, skt->nr, bs_mem);
- if (old_mecr != mecr)
- MECR = mecr;
-
- local_irq_restore(flags);
-
- debug(skt, 2, "FAST %X BSM %X BSA %X BSIO %X\n",
- MECR_FAST_GET(mecr, skt->nr),
- MECR_BSM_GET(mecr, skt->nr), MECR_BSA_GET(mecr, skt->nr),
- MECR_BSIO_GET(mecr, skt->nr));
-
- return 0;
-}
-
-static int
-sa1100_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
-{
- return sa1100_pcmcia_set_mecr(skt, cpufreq_get(0));
-}
-
-static int
-sa1100_pcmcia_show_timing(struct soc_pcmcia_socket *skt, char *buf)
-{
- struct soc_pcmcia_timing timing;
- unsigned int clock = cpufreq_get(0);
- unsigned long mecr = MECR;
- char *p = buf;
-
- soc_common_pcmcia_get_timing(skt, &timing);
-
- p+=sprintf(p, "I/O : %u (%u)\n", timing.io,
- sa1100_pcmcia_cmd_time(clock, MECR_BSIO_GET(mecr, skt->nr)));
-
- p+=sprintf(p, "attribute: %u (%u)\n", timing.attr,
- sa1100_pcmcia_cmd_time(clock, MECR_BSA_GET(mecr, skt->nr)));
-
- p+=sprintf(p, "common : %u (%u)\n", timing.mem,
- sa1100_pcmcia_cmd_time(clock, MECR_BSM_GET(mecr, skt->nr)));
-
- return p - buf;
-}
-
-int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops,
- int first, int nr)
-{
- /*
- * set default MECR calculation if the board specific
- * code did not specify one...
- */
- if (!ops->get_timing)
- ops->get_timing = sa1100_pcmcia_default_mecr_timing;
-
- /* Provide our SA11x0 specific timing routines. */
- ops->set_timing = sa1100_pcmcia_set_timing;
- ops->show_timing = sa1100_pcmcia_show_timing;
-
- return soc_common_drv_pcmcia_probe(dev, ops, first, nr);
-}
-EXPORT_SYMBOL(sa11xx_drv_pcmcia_probe);
-
-#ifdef CONFIG_CPU_FREQ
-
-/* sa1100_pcmcia_update_mecr()
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^
- * When sa1100_pcmcia_notifier() decides that a MECR adjustment (due
- * to a core clock frequency change) is needed, this routine establishes
- * new BS_xx values consistent with the clock speed `clock'.
- */
-static void sa1100_pcmcia_update_mecr(unsigned int clock)
-{
- struct soc_pcmcia_socket *skt;
-
- down(&soc_pcmcia_sockets_lock);
- list_for_each_entry(skt, &soc_pcmcia_sockets, node)
- sa1100_pcmcia_set_mecr(skt, clock);
- up(&soc_pcmcia_sockets_lock);
-}
-
-/* sa1100_pcmcia_notifier()
- * ^^^^^^^^^^^^^^^^^^^^^^^^
- * When changing the processor core clock frequency, it is necessary
- * to adjust the MECR timings accordingly. We've recorded the timings
- * requested by Card Services, so this is just a matter of finding
- * out what our current speed is, and then recomputing the new MECR
- * values.
- *
- * Returns: 0 on success, -1 on error
- */
-static int
-sa1100_pcmcia_notifier(struct notifier_block *nb, unsigned long val,
- void *data)
-{
- struct cpufreq_freqs *freqs = data;
-
- switch (val) {
- case CPUFREQ_PRECHANGE:
- if (freqs->new > freqs->old)
- sa1100_pcmcia_update_mecr(freqs->new);
- break;
-
- case CPUFREQ_POSTCHANGE:
- if (freqs->new < freqs->old)
- sa1100_pcmcia_update_mecr(freqs->new);
- break;
- case CPUFREQ_RESUMECHANGE:
- sa1100_pcmcia_update_mecr(freqs->new);
- break;
- }
-
- return 0;
-}
-
-static struct notifier_block sa1100_pcmcia_notifier_block = {
- .notifier_call = sa1100_pcmcia_notifier
-};
-
-static int __init sa11xx_pcmcia_init(void)
-{
- int ret;
-
- printk(KERN_INFO "SA11xx PCMCIA\n");
-
- ret = cpufreq_register_notifier(&sa1100_pcmcia_notifier_block,
- CPUFREQ_TRANSITION_NOTIFIER);
- if (ret < 0)
- printk(KERN_ERR "Unable to register CPU frequency change "
- "notifier (%d)\n", ret);
-
- return ret;
-}
-module_init(sa11xx_pcmcia_init);
-
-static void __exit sa11xx_pcmcia_exit(void)
-{
- cpufreq_unregister_notifier(&sa1100_pcmcia_notifier_block, CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-module_exit(sa11xx_pcmcia_exit);
-#endif
-
-MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
-MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11xx core socket driver");
-MODULE_LICENSE("Dual MPL/GPL");
+++ /dev/null
-/*======================================================================
-
- Device driver for the PCMCIA control functionality of StrongARM
- SA-1100 microprocessors.
-
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
-
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
-
- The initial developer of the original code is John G. Dorsey
- <john+@cs.cmu.edu>. Portions created by John G. Dorsey are
- Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
-
- Alternatively, the contents of this file may be used under the
- terms of the GNU Public License version 2 (the "GPL"), in which
- case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
-======================================================================*/
-
-#if !defined(_PCMCIA_SA1100_H)
-# define _PCMCIA_SA1100_H
-
-/* SA-1100 PCMCIA Memory and I/O timing
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- * The SA-1110 Developer's Manual, section 10.2.5, says the following:
- *
- * "To calculate the recommended BS_xx value for each address space:
- * divide the command width time (the greater of twIOWR and twIORD,
- * or the greater of twWE and twOE) by processor cycle time; divide
- * by 2; divide again by 3 (number of BCLK's per command assertion);
- * round up to the next whole number; and subtract 1."
- */
-
-/* MECR: Expansion Memory Configuration Register
- * (SA-1100 Developers Manual, p.10-13; SA-1110 Developers Manual, p.10-24)
- *
- * MECR layout is:
- *
- * FAST1 BSM1<4:0> BSA1<4:0> BSIO1<4:0> FAST0 BSM0<4:0> BSA0<4:0> BSIO0<4:0>
- *
- * (This layout is actually true only for the SA-1110; the FASTn bits are
- * reserved on the SA-1100.)
- */
-
-#define MECR_SOCKET_0_SHIFT (0)
-#define MECR_SOCKET_1_SHIFT (16)
-
-#define MECR_BS_MASK (0x1f)
-#define MECR_FAST_MODE_MASK (0x01)
-
-#define MECR_BSIO_SHIFT (0)
-#define MECR_BSA_SHIFT (5)
-#define MECR_BSM_SHIFT (10)
-#define MECR_FAST_SHIFT (15)
-
-#define MECR_SET(mecr, sock, shift, mask, bs) \
-((mecr)=((mecr)&~(((mask)<<(shift))<<\
- ((sock)==0?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT)))|\
- (((bs)<<(shift))<<((sock)==0?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT)))
-
-#define MECR_GET(mecr, sock, shift, mask) \
-((((mecr)>>(((sock)==0)?MECR_SOCKET_0_SHIFT:MECR_SOCKET_1_SHIFT))>>\
- (shift))&(mask))
-
-#define MECR_BSIO_SET(mecr, sock, bs) \
-MECR_SET((mecr), (sock), MECR_BSIO_SHIFT, MECR_BS_MASK, (bs))
-
-#define MECR_BSIO_GET(mecr, sock) \
-MECR_GET((mecr), (sock), MECR_BSIO_SHIFT, MECR_BS_MASK)
-
-#define MECR_BSA_SET(mecr, sock, bs) \
-MECR_SET((mecr), (sock), MECR_BSA_SHIFT, MECR_BS_MASK, (bs))
-
-#define MECR_BSA_GET(mecr, sock) \
-MECR_GET((mecr), (sock), MECR_BSA_SHIFT, MECR_BS_MASK)
-
-#define MECR_BSM_SET(mecr, sock, bs) \
-MECR_SET((mecr), (sock), MECR_BSM_SHIFT, MECR_BS_MASK, (bs))
-
-#define MECR_BSM_GET(mecr, sock) \
-MECR_GET((mecr), (sock), MECR_BSM_SHIFT, MECR_BS_MASK)
-
-#define MECR_FAST_SET(mecr, sock, fast) \
-MECR_SET((mecr), (sock), MECR_FAST_SHIFT, MECR_FAST_MODE_MASK, (fast))
-
-#define MECR_FAST_GET(mecr, sock) \
-MECR_GET((mecr), (sock), MECR_FAST_SHIFT, MECR_FAST_MODE_MASK)
-
-
-/* This function implements the BS value calculation for setting the MECR
- * using integer arithmetic:
- */
-static inline unsigned int sa1100_pcmcia_mecr_bs(unsigned int pcmcia_cycle_ns,
- unsigned int cpu_clock_khz){
- unsigned int t = ((pcmcia_cycle_ns * cpu_clock_khz) / 6) - 1000000;
- return (t / 1000000) + (((t % 1000000) == 0) ? 0 : 1);
-}
-
-/* This function returns the (approximate) command assertion period, in
- * nanoseconds, for a given CPU clock frequency and MECR BS value:
- */
-static inline unsigned int sa1100_pcmcia_cmd_time(unsigned int cpu_clock_khz,
- unsigned int pcmcia_mecr_bs){
- return (((10000000 * 2) / cpu_clock_khz) * (3 * (pcmcia_mecr_bs + 1))) / 10;
-}
-
-
-extern int sa11xx_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr);
-
-#endif /* !defined(_PCMCIA_SA1100_H) */
+++ /dev/null
-/*======================================================================
-
- Common support code for the PCMCIA control functionality of
- integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
-
- The contents of this file are subject to the Mozilla Public
- License Version 1.1 (the "License"); you may not use this file
- except in compliance with the License. You may obtain a copy of
- the License at http://www.mozilla.org/MPL/
-
- Software distributed under the License is distributed on an "AS
- IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- implied. See the License for the specific language governing
- rights and limitations under the License.
-
- The initial developer of the original code is John G. Dorsey
- <john+@cs.cmu.edu>. Portions created by John G. Dorsey are
- Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
-
- Alternatively, the contents of this file may be used under the
- terms of the GNU Public License version 2 (the "GPL"), in which
- case the provisions of the GPL are applicable instead of the
- above. If you wish to allow the use of your version of this file
- only under the terms of the GPL and not to allow others to use
- your version of this file under the MPL, indicate your decision
- by deleting the provisions above and replace them with the notice
- and other provisions required by the GPL. If you do not delete
- the provisions above, a recipient may use your version of this
- file under either the MPL or the GPL.
-
-======================================================================*/
-
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-
-#include "soc_common.h"
-
-#ifdef DEBUG
-
-static int pc_debug;
-module_param(pc_debug, int, 0644);
-
-void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
- int lvl, const char *fmt, ...)
-{
- va_list args;
- if (pc_debug > lvl) {
- printk(KERN_DEBUG "skt%u: %s: ", skt->nr, func);
- va_start(args, fmt);
- printk(fmt, args);
- va_end(args);
- }
-}
-
-#endif
-
-#define to_soc_pcmcia_socket(x) container_of(x, struct soc_pcmcia_socket, socket)
-
-static unsigned short
-calc_speed(unsigned short *spds, int num, unsigned short dflt)
-{
- unsigned short speed = 0;
- int i;
-
- for (i = 0; i < num; i++)
- if (speed < spds[i])
- speed = spds[i];
- if (speed == 0)
- speed = dflt;
-
- return speed;
-}
-
-void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, struct soc_pcmcia_timing *timing)
-{
- timing->io = calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS);
- timing->mem = calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS);
- timing->attr = calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS);
-}
-EXPORT_SYMBOL(soc_common_pcmcia_get_timing);
-
-static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt)
-{
- struct pcmcia_state state;
- unsigned int stat;
-
- memset(&state, 0, sizeof(struct pcmcia_state));
-
- skt->ops->socket_state(skt, &state);
-
- stat = state.detect ? SS_DETECT : 0;
- stat |= state.ready ? SS_READY : 0;
- stat |= state.wrprot ? SS_WRPROT : 0;
- stat |= state.vs_3v ? SS_3VCARD : 0;
- stat |= state.vs_Xv ? SS_XVCARD : 0;
-
- /* The power status of individual sockets is not available
- * explicitly from the hardware, so we just remember the state
- * and regurgitate it upon request:
- */
- stat |= skt->cs_state.Vcc ? SS_POWERON : 0;
-
- if (skt->cs_state.flags & SS_IOCARD)
- stat |= state.bvd1 ? SS_STSCHG : 0;
- else {
- if (state.bvd1 == 0)
- stat |= SS_BATDEAD;
- else if (state.bvd2 == 0)
- stat |= SS_BATWARN;
- }
- return stat;
-}
-
-/*
- * soc_common_pcmcia_config_skt
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- *
- * Convert PCMCIA socket state to our socket configure structure.
- */
-static int
-soc_common_pcmcia_config_skt(struct soc_pcmcia_socket *skt, socket_state_t *state)
-{
- int ret;
-
- ret = skt->ops->configure_socket(skt, state);
- if (ret == 0) {
- /*
- * This really needs a better solution. The IRQ
- * may or may not be claimed by the driver.
- */
- if (skt->irq_state != 1 && state->io_irq) {
- skt->irq_state = 1;
- set_irq_type(skt->irq, IRQT_FALLING);
- } else if (skt->irq_state == 1 && state->io_irq == 0) {
- skt->irq_state = 0;
- set_irq_type(skt->irq, IRQT_NOEDGE);
- }
-
- skt->cs_state = *state;
- }
-
- if (ret < 0)
- printk(KERN_ERR "soc_common_pcmcia: unable to configure "
- "socket %d\n", skt->nr);
-
- return ret;
-}
-
-/* soc_common_pcmcia_sock_init()
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- *
- * (Re-)Initialise the socket, turning on status interrupts
- * and PCMCIA bus. This must wait for power to stabilise
- * so that the card status signals report correctly.
- *
- * Returns: 0
- */
-static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
-
- debug(skt, 2, "initializing socket\n");
-
- skt->ops->socket_init(skt);
- return 0;
-}
-
-
-/*
- * soc_common_pcmcia_suspend()
- * ^^^^^^^^^^^^^^^^^^^^^^^^^^^
- *
- * Remove power on the socket, disable IRQs from the card.
- * Turn off status interrupts, and disable the PCMCIA bus.
- *
- * Returns: 0
- */
-static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
- int ret;
-
- debug(skt, 2, "suspending socket\n");
-
- ret = soc_common_pcmcia_config_skt(skt, &dead_socket);
- if (ret == 0)
- skt->ops->socket_suspend(skt);
-
- return ret;
-}
-
-static spinlock_t status_lock = SPIN_LOCK_UNLOCKED;
-
-static void soc_common_check_status(struct soc_pcmcia_socket *skt)
-{
- unsigned int events;
-
- debug(skt, 4, "entering PCMCIA monitoring thread\n");
-
- do {
- unsigned int status;
- unsigned long flags;
-
- status = soc_common_pcmcia_skt_state(skt);
-
- spin_lock_irqsave(&status_lock, flags);
- events = (status ^ skt->status) & skt->cs_state.csc_mask;
- skt->status = status;
- spin_unlock_irqrestore(&status_lock, flags);
-
- debug(skt, 4, "events: %s%s%s%s%s%s\n",
- events == 0 ? "<NONE>" : "",
- events & SS_DETECT ? "DETECT " : "",
- events & SS_READY ? "READY " : "",
- events & SS_BATDEAD ? "BATDEAD " : "",
- events & SS_BATWARN ? "BATWARN " : "",
- events & SS_STSCHG ? "STSCHG " : "");
-
- if (events)
- pcmcia_parse_events(&skt->socket, events);
- } while (events);
-}
-
-/* Let's poll for events in addition to IRQs since IRQ only is unreliable... */
-static void soc_common_pcmcia_poll_event(unsigned long dummy)
-{
- struct soc_pcmcia_socket *skt = (struct soc_pcmcia_socket *)dummy;
- debug(skt, 4, "polling for events\n");
-
- mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD);
-
- soc_common_check_status(skt);
-}
-
-
-/*
- * Service routine for socket driver interrupts (requested by the
- * low-level PCMCIA init() operation via soc_common_pcmcia_thread()).
- * The actual interrupt-servicing work is performed by
- * soc_common_pcmcia_thread(), largely because the Card Services event-
- * handling code performs scheduling operations which cannot be
- * executed from within an interrupt context.
- */
-static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev, struct pt_regs *regs)
-{
- struct soc_pcmcia_socket *skt = dev;
-
- debug(skt, 3, "servicing IRQ %d\n", irq);
-
- soc_common_check_status(skt);
-
- return IRQ_HANDLED;
-}
-
-
-/*
- * Implements the get_status() operation for the in-kernel PCMCIA
- * service (formerly SS_GetStatus in Card Services). Essentially just
- * fills in bits in `status' according to internal driver state or
- * the value of the voltage detect chipselect register.
- *
- * As a debugging note, during card startup, the PCMCIA core issues
- * three set_socket() commands in a row the first with RESET deasserted,
- * the second with RESET asserted, and the last with RESET deasserted
- * again. Following the third set_socket(), a get_status() command will
- * be issued. The kernel is looking for the SS_READY flag (see
- * setup_socket(), reset_socket(), and unreset_socket() in cs.c).
- *
- * Returns: 0
- */
-static int
-soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
-
- skt->status = soc_common_pcmcia_skt_state(skt);
- *status = skt->status;
-
- return 0;
-}
-
-
-/*
- * Implements the get_socket() operation for the in-kernel PCMCIA
- * service (formerly SS_GetSocket in Card Services). Not a very
- * exciting routine.
- *
- * Returns: 0
- */
-static int
-soc_common_pcmcia_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
-
- debug(skt, 2, "\n");
-
- *state = skt->cs_state;
-
- return 0;
-}
-
-/*
- * Implements the set_socket() operation for the in-kernel PCMCIA
- * service (formerly SS_SetSocket in Card Services). We more or
- * less punt all of this work and let the kernel handle the details
- * of power configuration, reset, &c. We also record the value of
- * `state' in order to regurgitate it to the PCMCIA core later.
- *
- * Returns: 0
- */
-static int
-soc_common_pcmcia_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
-
- debug(skt, 2, "mask: %s%s%s%s%s%sflags: %s%s%s%s%s%sVcc %d Vpp %d irq %d\n",
- (state->csc_mask==0)?"<NONE> ":"",
- (state->csc_mask&SS_DETECT)?"DETECT ":"",
- (state->csc_mask&SS_READY)?"READY ":"",
- (state->csc_mask&SS_BATDEAD)?"BATDEAD ":"",
- (state->csc_mask&SS_BATWARN)?"BATWARN ":"",
- (state->csc_mask&SS_STSCHG)?"STSCHG ":"",
- (state->flags==0)?"<NONE> ":"",
- (state->flags&SS_PWR_AUTO)?"PWR_AUTO ":"",
- (state->flags&SS_IOCARD)?"IOCARD ":"",
- (state->flags&SS_RESET)?"RESET ":"",
- (state->flags&SS_SPKR_ENA)?"SPKR_ENA ":"",
- (state->flags&SS_OUTPUT_ENA)?"OUTPUT_ENA ":"",
- state->Vcc, state->Vpp, state->io_irq);
-
- return soc_common_pcmcia_config_skt(skt, state);
-}
-
-
-/*
- * Implements the set_io_map() operation for the in-kernel PCMCIA
- * service (formerly SS_SetIOMap in Card Services). We configure
- * the map speed as requested, but override the address ranges
- * supplied by Card Services.
- *
- * Returns: 0 on success, -1 on error
- */
-static int
-soc_common_pcmcia_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *map)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
- unsigned short speed = map->speed;
-
- debug(skt, 2, "map %u speed %u start 0x%08x stop 0x%08x\n",
- map->map, map->speed, map->start, map->stop);
- debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n",
- (map->flags==0)?"<NONE>":"",
- (map->flags&MAP_ACTIVE)?"ACTIVE ":"",
- (map->flags&MAP_16BIT)?"16BIT ":"",
- (map->flags&MAP_AUTOSZ)?"AUTOSZ ":"",
- (map->flags&MAP_0WS)?"0WS ":"",
- (map->flags&MAP_WRPROT)?"WRPROT ":"",
- (map->flags&MAP_USE_WAIT)?"USE_WAIT ":"",
- (map->flags&MAP_PREFETCH)?"PREFETCH ":"");
-
- if (map->map >= MAX_IO_WIN) {
- printk(KERN_ERR "%s(): map (%d) out of range\n", __FUNCTION__,
- map->map);
- return -1;
- }
-
- if (map->flags & MAP_ACTIVE) {
- if (speed == 0)
- speed = SOC_PCMCIA_IO_ACCESS;
- } else {
- speed = 0;
- }
-
- skt->spd_io[map->map] = speed;
- skt->ops->set_timing(skt);
-
- if (map->stop == 1)
- map->stop = PAGE_SIZE-1;
-
- map->stop -= map->start;
- map->stop += (unsigned long)skt->virt_io;
- map->start = (unsigned long)skt->virt_io;
-
- return 0;
-}
-
-
-/*
- * Implements the set_mem_map() operation for the in-kernel PCMCIA
- * service (formerly SS_SetMemMap in Card Services). We configure
- * the map speed as requested, but override the address ranges
- * supplied by Card Services.
- *
- * Returns: 0 on success, -1 on error
- */
-static int
-soc_common_pcmcia_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *map)
-{
- struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
- struct resource *res;
- unsigned short speed = map->speed;
-
- debug(skt, 2, "map %u speed %u card_start %08x\n",
- map->map, map->speed, map->card_start);
- debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n",
- (map->flags==0)?"<NONE>":"",
- (map->flags&MAP_ACTIVE)?"ACTIVE ":"",
- (map->flags&MAP_16BIT)?"16BIT ":"",
- (map->flags&MAP_AUTOSZ)?"AUTOSZ ":"",
- (map->flags&MAP_0WS)?"0WS ":"",
- (map->flags&MAP_WRPROT)?"WRPROT ":"",
- (map->flags&MAP_ATTRIB)?"ATTRIB ":"",
- (map->flags&MAP_USE_WAIT)?"USE_WAIT ":"");
-
- if (map->map >= MAX_WIN)
- return -EINVAL;
-
- if (map->flags & MAP_ACTIVE) {
- if (speed == 0)
- speed = 300;
- } else {
- speed = 0;
- }
-
- if (map->flags & MAP_ATTRIB) {
- res = &skt->res_attr;
- skt->spd_attr[map->map] = speed;
- skt->spd_mem[map->map] = 0;
- } else {
- res = &skt->res_mem;
- skt->spd_attr[map->map] = 0;
- skt->spd_mem[map->map] = speed;
- }
-
- skt->ops->set_timing(skt);
-
- map->sys_stop -= map->sys_start;
- map->sys_stop += res->start + map->card_start;
- map->sys_start = res->start + map->card_start;
-
- return 0;
-}
-
-struct bittbl {
- unsigned int mask;
- const char *name;
-};
-
-static struct bittbl status_bits[] = {
- { SS_WRPROT, "SS_WRPROT" },
- { SS_BATDEAD, "SS_BATDEAD" },
- { SS_BATWARN, "SS_BATWARN" },
- { SS_READY, "SS_READY" },
- { SS_DETECT, "SS_DETECT" },
- { SS_POWERON, "SS_POWERON" },
- { SS_STSCHG, "SS_STSCHG" },
- { SS_3VCARD, "SS_3VCARD" },
- { SS_XVCARD, "SS_XVCARD" },
-};
-
-static struct bittbl conf_bits[] = {
- { SS_PWR_AUTO, "SS_PWR_AUTO" },
- { SS_IOCARD, "SS_IOCARD" },
- { SS_RESET, "SS_RESET" },
- { SS_DMA_MODE, "SS_DMA_MODE" },
- { SS_SPKR_ENA, "SS_SPKR_ENA" },
- { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" },
-};
-
-static void
-dump_bits(char **p, const char *prefix, unsigned int val, struct bittbl *bits, int sz)
-{
- char *b = *p;
- int i;
-
- b += sprintf(b, "%-9s:", prefix);
- for (i = 0; i < sz; i++)
- if (val & bits[i].mask)
- b += sprintf(b, " %s", bits[i].name);
- *b++ = '\n';
- *p = b;
-}
-
-/*
- * Implements the /sys/class/pcmcia_socket/??/status file.
- *
- * Returns: the number of characters added to the buffer
- */
-static ssize_t show_status(struct class_device *class_dev, char *buf)
-{
- struct soc_pcmcia_socket *skt =
- container_of(class_dev, struct soc_pcmcia_socket, socket.dev);
- char *p = buf;
-
- p+=sprintf(p, "slot : %d\n", skt->nr);
-
- dump_bits(&p, "status", skt->status,
- status_bits, ARRAY_SIZE(status_bits));
- dump_bits(&p, "csc_mask", skt->cs_state.csc_mask,
- status_bits, ARRAY_SIZE(status_bits));
- dump_bits(&p, "cs_flags", skt->cs_state.flags,
- conf_bits, ARRAY_SIZE(conf_bits));
-
- p+=sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc);
- p+=sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp);
- p+=sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, skt->irq);
- if (skt->ops->show_timing)
- p+=skt->ops->show_timing(skt, p);
-
- return p-buf;
-}
-static CLASS_DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
-
-
-static struct pccard_operations soc_common_pcmcia_operations = {
- .init = soc_common_pcmcia_sock_init,
- .suspend = soc_common_pcmcia_suspend,
- .get_status = soc_common_pcmcia_get_status,
- .get_socket = soc_common_pcmcia_get_socket,
- .set_socket = soc_common_pcmcia_set_socket,
- .set_io_map = soc_common_pcmcia_set_io_map,
- .set_mem_map = soc_common_pcmcia_set_mem_map,
-};
-
-
-int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt,
- struct pcmcia_irqs *irqs, int nr)
-{
- int i, res = 0;
-
- for (i = 0; i < nr; i++) {
- if (irqs[i].sock != skt->nr)
- continue;
- res = request_irq(irqs[i].irq, soc_common_pcmcia_interrupt,
- SA_INTERRUPT, irqs[i].str, skt);
- if (res)
- break;
- set_irq_type(irqs[i].irq, IRQT_NOEDGE);
- }
-
- if (res) {
- printk(KERN_ERR "PCMCIA: request for IRQ%d failed (%d)\n",
- irqs[i].irq, res);
-
- while (i--)
- if (irqs[i].sock == skt->nr)
- free_irq(irqs[i].irq, skt);
- }
- return res;
-}
-EXPORT_SYMBOL(soc_pcmcia_request_irqs);
-
-void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt,
- struct pcmcia_irqs *irqs, int nr)
-{
- int i;
-
- for (i = 0; i < nr; i++)
- if (irqs[i].sock == skt->nr)
- free_irq(irqs[i].irq, skt);
-}
-EXPORT_SYMBOL(soc_pcmcia_free_irqs);
-
-void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt,
- struct pcmcia_irqs *irqs, int nr)
-{
- int i;
-
- for (i = 0; i < nr; i++)
- if (irqs[i].sock == skt->nr)
- set_irq_type(irqs[i].irq, IRQT_NOEDGE);
-}
-EXPORT_SYMBOL(soc_pcmcia_disable_irqs);
-
-void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt,
- struct pcmcia_irqs *irqs, int nr)
-{
- int i;
-
- for (i = 0; i < nr; i++)
- if (irqs[i].sock == skt->nr) {
- set_irq_type(irqs[i].irq, IRQT_RISING);
- set_irq_type(irqs[i].irq, IRQT_BOTHEDGE);
- }
-}
-EXPORT_SYMBOL(soc_pcmcia_enable_irqs);
-
-
-LIST_HEAD(soc_pcmcia_sockets);
-DECLARE_MUTEX(soc_pcmcia_sockets_lock);
-
-static const char *skt_names[] = {
- "PCMCIA socket 0",
- "PCMCIA socket 1",
-};
-
-struct skt_dev_info {
- int nskt;
- struct soc_pcmcia_socket skt[0];
-};
-
-#define SKT_DEV_INFO_SIZE(n) \
- (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
-
-int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr)
-{
- struct skt_dev_info *sinfo;
- int ret, i;
-
- down(&soc_pcmcia_sockets_lock);
-
- sinfo = kmalloc(SKT_DEV_INFO_SIZE(nr), GFP_KERNEL);
- if (!sinfo) {
- ret = -ENOMEM;
- goto out;
- }
-
- memset(sinfo, 0, SKT_DEV_INFO_SIZE(nr));
- sinfo->nskt = nr;
-
- /*
- * Initialise the per-socket structure.
- */
- for (i = 0; i < nr; i++) {
- struct soc_pcmcia_socket *skt = &sinfo->skt[i];
-
- skt->socket.ops = &soc_common_pcmcia_operations;
- skt->socket.owner = ops->owner;
- skt->socket.dev.dev = dev;
-
- init_timer(&skt->poll_timer);
- skt->poll_timer.function = soc_common_pcmcia_poll_event;
- skt->poll_timer.data = (unsigned long)skt;
- skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD;
-
- skt->nr = first + i;
- skt->irq = NO_IRQ;
- skt->dev = dev;
- skt->ops = ops;
-
- skt->res_skt.start = _PCMCIA(skt->nr);
- skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
- skt->res_skt.name = skt_names[skt->nr];
- skt->res_skt.flags = IORESOURCE_MEM;
-
- ret = request_resource(&iomem_resource, &skt->res_skt);
- if (ret)
- goto out_err_1;
-
- skt->res_io.start = _PCMCIAIO(skt->nr);
- skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
- skt->res_io.name = "io";
- skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-
- ret = request_resource(&skt->res_skt, &skt->res_io);
- if (ret)
- goto out_err_2;
-
- skt->res_mem.start = _PCMCIAMem(skt->nr);
- skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
- skt->res_mem.name = "memory";
- skt->res_mem.flags = IORESOURCE_MEM;
-
- ret = request_resource(&skt->res_skt, &skt->res_mem);
- if (ret)
- goto out_err_3;
-
- skt->res_attr.start = _PCMCIAAttr(skt->nr);
- skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
- skt->res_attr.name = "attribute";
- skt->res_attr.flags = IORESOURCE_MEM;
-
- ret = request_resource(&skt->res_skt, &skt->res_attr);
- if (ret)
- goto out_err_4;
-
- skt->virt_io = ioremap(skt->res_io.start, 0x10000);
- if (skt->virt_io == NULL) {
- ret = -ENOMEM;
- goto out_err_5;
- }
-
- list_add(&skt->node, &soc_pcmcia_sockets);
-
- /*
- * We initialize default socket timing here, because
- * we are not guaranteed to see a SetIOMap operation at
- * runtime.
- */
- ops->set_timing(skt);
-
- ret = ops->hw_init(skt);
- if (ret)
- goto out_err_6;
-
- skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
- skt->socket.irq_mask = 0;
- skt->socket.map_size = PAGE_SIZE;
- skt->socket.pci_irq = skt->irq;
- skt->socket.io_offset = (unsigned long)skt->virt_io;
-
- skt->status = soc_common_pcmcia_skt_state(skt);
-
- ret = pcmcia_register_socket(&skt->socket);
- if (ret)
- goto out_err_7;
-
- WARN_ON(skt->socket.sock != i);
-
- add_timer(&skt->poll_timer);
-
- class_device_create_file(&skt->socket.dev, &class_device_attr_status);
- }
-
- dev_set_drvdata(dev, sinfo);
- ret = 0;
- goto out;
-
- do {
- struct soc_pcmcia_socket *skt = &sinfo->skt[i];
-
- del_timer_sync(&skt->poll_timer);
- pcmcia_unregister_socket(&skt->socket);
-
- out_err_7:
- flush_scheduled_work();
-
- ops->hw_shutdown(skt);
- out_err_6:
- list_del(&skt->node);
- iounmap(skt->virt_io);
- out_err_5:
- release_resource(&skt->res_attr);
- out_err_4:
- release_resource(&skt->res_mem);
- out_err_3:
- release_resource(&skt->res_io);
- out_err_2:
- release_resource(&skt->res_skt);
- out_err_1:
- i--;
- } while (i > 0);
-
- kfree(sinfo);
-
- out:
- up(&soc_pcmcia_sockets_lock);
- return ret;
-}
-
-int soc_common_drv_pcmcia_remove(struct device *dev)
-{
- struct skt_dev_info *sinfo = dev_get_drvdata(dev);
- int i;
-
- dev_set_drvdata(dev, NULL);
-
- down(&soc_pcmcia_sockets_lock);
- for (i = 0; i < sinfo->nskt; i++) {
- struct soc_pcmcia_socket *skt = &sinfo->skt[i];
-
- del_timer_sync(&skt->poll_timer);
-
- pcmcia_unregister_socket(&skt->socket);
-
- flush_scheduled_work();
-
- skt->ops->hw_shutdown(skt);
-
- soc_common_pcmcia_config_skt(skt, &dead_socket);
-
- list_del(&skt->node);
- iounmap(skt->virt_io);
- skt->virt_io = NULL;
- release_resource(&skt->res_attr);
- release_resource(&skt->res_mem);
- release_resource(&skt->res_io);
- release_resource(&skt->res_skt);
- }
- up(&soc_pcmcia_sockets_lock);
-
- kfree(sinfo);
-
- return 0;
-}
+++ /dev/null
-/*
- * linux/drivers/pcmcia/soc_common.h
- *
- * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
- *
- * This file contains definitions for the PCMCIA support code common to
- * integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
- */
-#ifndef _ASM_ARCH_PCMCIA
-#define _ASM_ARCH_PCMCIA
-
-/* include the world */
-#include <pcmcia/version.h>
-#include <pcmcia/cs_types.h>
-#include <pcmcia/cs.h>
-#include <pcmcia/ss.h>
-#include <pcmcia/bulkmem.h>
-#include <pcmcia/cistpl.h>
-#include "cs_internal.h"
-
-
-struct device;
-struct pcmcia_low_level;
-
-/*
- * This structure encapsulates per-socket state which we might need to
- * use when responding to a Card Services query of some kind.
- */
-struct soc_pcmcia_socket {
- struct pcmcia_socket socket;
-
- /*
- * Info from low level handler
- */
- struct device *dev;
- unsigned int nr;
- unsigned int irq;
-
- /*
- * Core PCMCIA state
- */
- struct pcmcia_low_level *ops;
-
- unsigned int status;
- socket_state_t cs_state;
-
- unsigned short spd_io[MAX_IO_WIN];
- unsigned short spd_mem[MAX_WIN];
- unsigned short spd_attr[MAX_WIN];
-
- struct resource res_skt;
- struct resource res_io;
- struct resource res_mem;
- struct resource res_attr;
- void *virt_io;
-
- unsigned int irq_state;
-
- struct timer_list poll_timer;
- struct list_head node;
-};
-
-struct pcmcia_state {
- unsigned detect: 1,
- ready: 1,
- bvd1: 1,
- bvd2: 1,
- wrprot: 1,
- vs_3v: 1,
- vs_Xv: 1;
-};
-
-struct pcmcia_low_level {
- struct module *owner;
-
- /* first socket in system */
- int first;
- /* nr of sockets */
- int nr;
-
- int (*hw_init)(struct soc_pcmcia_socket *);
- void (*hw_shutdown)(struct soc_pcmcia_socket *);
-
- void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
- int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
-
- /*
- * Enable card status IRQs on (re-)initialisation. This can
- * be called at initialisation, power management event, or
- * pcmcia event.
- */
- void (*socket_init)(struct soc_pcmcia_socket *);
-
- /*
- * Disable card status IRQs and PCMCIA bus on suspend.
- */
- void (*socket_suspend)(struct soc_pcmcia_socket *);
-
- /*
- * Hardware specific timing routines.
- * If provided, the get_timing routine overrides the SOC default.
- */
- unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
- int (*set_timing)(struct soc_pcmcia_socket *);
- int (*show_timing)(struct soc_pcmcia_socket *, char *);
-};
-
-
-struct pcmcia_irqs {
- int sock;
- int irq;
- const char *str;
-};
-
-struct soc_pcmcia_timing {
- unsigned short io;
- unsigned short mem;
- unsigned short attr;
-};
-
-extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
-extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
-extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
-extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
-extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
-
-
-extern struct list_head soc_pcmcia_sockets;
-extern struct semaphore soc_pcmcia_sockets_lock;
-
-extern int soc_common_drv_pcmcia_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr);
-extern int soc_common_drv_pcmcia_remove(struct device *dev);
-
-
-#ifdef DEBUG
-
-extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
- int lvl, const char *fmt, ...);
-
-#define debug(skt, lvl, fmt, arg...) \
- soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
-
-#else
-#define debug(skt, lvl, fmt, arg...) do { } while (0)
-#endif
-
-
-/*
- * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
- * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
- * a minimum value of 165ns, as well. Section 4.7.2 (describing
- * common and attribute memory write timing) says that twWE has a
- * minimum value of 150ns for a 250ns cycle time (for 5V operation;
- * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
- * operation, also section 4.7.4). Section 4.7.3 says that taOE
- * has a maximum value of 150ns for a 300ns cycle time (for 5V
- * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
- *
- * When configuring memory maps, Card Services appears to adopt the policy
- * that a memory access time of "0" means "use the default." The default
- * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
- * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
- * memory command width time is 300ns.
- */
-#define SOC_PCMCIA_IO_ACCESS (165)
-#define SOC_PCMCIA_5V_MEM_ACCESS (150)
-#define SOC_PCMCIA_3V_MEM_ACCESS (300)
-#define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
-
-/*
- * The socket driver actually works nicely in interrupt-driven form,
- * so the (relatively infrequent) polling is "just to be sure."
- */
-#define SOC_PCMCIA_POLL_PERIOD (2*HZ)
-
-
-/* I/O pins replacing memory pins
- * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
- *
- * These signals change meaning when going from memory-only to
- * memory-or-I/O interface:
- */
-#define iostschg bvd1
-#define iospkr bvd2
-
-#endif
+++ /dev/null
-/*----------------------------------------------------------------*/
-/*
- Qlogic linux driver - work in progress. No Warranty express or implied.
- Use at your own risk. Support Tort Reform so you won't have to read all
- these silly disclaimers.
-
- Copyright 1994, Tom Zerucha.
- tz@execpc.com
-
- Additional Code, and much appreciated help by
- Michael A. Griffith
- grif@cs.ucr.edu
-
- Thanks to Eric Youngdale and Dave Hinds for loadable module and PCMCIA
- help respectively, and for suffering through my foolishness during the
- debugging process.
-
- Reference Qlogic FAS408 Technical Manual, 53408-510-00A, May 10, 1994
- (you can reference it, but it is incomplete and inaccurate in places)
-
- Version 0.46 1/30/97 - kernel 1.2.0+
-
- Functions as standalone, loadable, and PCMCIA driver, the latter from
- Dave Hinds' PCMCIA package.
-
- Cleaned up 26/10/2002 by Alan Cox <alan@redhat.com> as part of the 2.5
- SCSI driver cleanup and audit. This driver still needs work on the
- following
- - Non terminating hardware waits
- - Some layering violations with its pcmcia stub
-
- Redistributable under terms of the GNU General Public License
-
- For the avoidance of doubt the "preferred form" of this code is one which
- is in an open non patent encumbered format. Where cryptographic key signing
- forms part of the process of creating an executable the information
- including keys needed to generate an equivalently functional executable
- are deemed to be part of the source code.
-
-*/
-
-#include <linux/module.h>
-#include <linux/blkdev.h> /* to get disk capacity */
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/proc_fs.h>
-#include <linux/unistd.h>
-#include <linux/spinlock.h>
-#include <linux/stat.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-#include "qlogicfas408.h"
-
-/*----------------------------------------------------------------*/
-static int qlcfg5 = (XTALFREQ << 5); /* 15625/512 */
-static int qlcfg6 = SYNCXFRPD;
-static int qlcfg7 = SYNCOFFST;
-static int qlcfg8 = (SLOWCABLE << 7) | (QL_ENABLE_PARITY << 4);
-static int qlcfg9 = ((XTALFREQ + 4) / 5);
-static int qlcfgc = (FASTCLK << 3) | (FASTSCSI << 4);
-
-/*----------------------------------------------------------------*/
-
-/*----------------------------------------------------------------*/
-/* local functions */
-/*----------------------------------------------------------------*/
-
-/* error recovery - reset everything */
-
-static void ql_zap(struct qlogicfas408_priv *priv)
-{
- int x;
- int qbase = priv->qbase;
- int int_type = priv->int_type;
-
- x = inb(qbase + 0xd);
- REG0;
- outb(3, qbase + 3); /* reset SCSI */
- outb(2, qbase + 3); /* reset chip */
- if (x & 0x80)
- REG1;
-}
-
-/*
- * Do a pseudo-dma tranfer
- */
-
-static int ql_pdma(struct qlogicfas408_priv *priv, int phase, char *request, int reqlen)
-{
- int j;
- int qbase = priv->qbase;
- j = 0;
- if (phase & 1) { /* in */
-#if QL_TURBO_PDMA
- rtrc(4)
- /* empty fifo in large chunks */
- if (reqlen >= 128 && (inb(qbase + 8) & 2)) { /* full */
- insl(qbase + 4, request, 32);
- reqlen -= 128;
- request += 128;
- }
- while (reqlen >= 84 && !(j & 0xc0)) /* 2/3 */
- if ((j = inb(qbase + 8)) & 4)
- {
- insl(qbase + 4, request, 21);
- reqlen -= 84;
- request += 84;
- }
- if (reqlen >= 44 && (inb(qbase + 8) & 8)) { /* 1/3 */
- insl(qbase + 4, request, 11);
- reqlen -= 44;
- request += 44;
- }
-#endif
- /* until both empty and int (or until reclen is 0) */
- rtrc(7)
- j = 0;
- while (reqlen && !((j & 0x10) && (j & 0xc0)))
- {
- /* while bytes to receive and not empty */
- j &= 0xc0;
- while (reqlen && !((j = inb(qbase + 8)) & 0x10))
- {
- *request++ = inb(qbase + 4);
- reqlen--;
- }
- if (j & 0x10)
- j = inb(qbase + 8);
-
- }
- } else { /* out */
-#if QL_TURBO_PDMA
- rtrc(4)
- if (reqlen >= 128 && inb(qbase + 8) & 0x10) { /* empty */
- outsl(qbase + 4, request, 32);
- reqlen -= 128;
- request += 128;
- }
- while (reqlen >= 84 && !(j & 0xc0)) /* 1/3 */
- if (!((j = inb(qbase + 8)) & 8)) {
- outsl(qbase + 4, request, 21);
- reqlen -= 84;
- request += 84;
- }
- if (reqlen >= 40 && !(inb(qbase + 8) & 4)) { /* 2/3 */
- outsl(qbase + 4, request, 10);
- reqlen -= 40;
- request += 40;
- }
-#endif
- /* until full and int (or until reclen is 0) */
- rtrc(7)
- j = 0;
- while (reqlen && !((j & 2) && (j & 0xc0))) {
- /* while bytes to send and not full */
- while (reqlen && !((j = inb(qbase + 8)) & 2))
- {
- outb(*request++, qbase + 4);
- reqlen--;
- }
- if (j & 2)
- j = inb(qbase + 8);
- }
- }
- /* maybe return reqlen */
- return inb(qbase + 8) & 0xc0;
-}
-
-/*
- * Wait for interrupt flag (polled - not real hardware interrupt)
- */
-
-static int ql_wai(struct qlogicfas408_priv *priv)
-{
- int k;
- int qbase = priv->qbase;
- unsigned long i;
-
- k = 0;
- i = jiffies + WATCHDOG;
- while (time_before(jiffies, i) && !priv->qabort &&
- !((k = inb(qbase + 4)) & 0xe0)) {
- barrier();
- cpu_relax();
- }
- if (time_after_eq(jiffies, i))
- return (DID_TIME_OUT);
- if (priv->qabort)
- return (priv->qabort == 1 ? DID_ABORT : DID_RESET);
- if (k & 0x60)
- ql_zap(priv);
- if (k & 0x20)
- return (DID_PARITY);
- if (k & 0x40)
- return (DID_ERROR);
- return 0;
-}
-
-/*
- * Initiate scsi command - queueing handler
- * caller must hold host lock
- */
-
-static void ql_icmd(Scsi_Cmnd * cmd)
-{
- struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
- int qbase = priv->qbase;
- int int_type = priv->int_type;
- unsigned int i;
-
- priv->qabort = 0;
-
- REG0;
- /* clearing of interrupts and the fifo is needed */
-
- inb(qbase + 5); /* clear interrupts */
- if (inb(qbase + 5)) /* if still interrupting */
- outb(2, qbase + 3); /* reset chip */
- else if (inb(qbase + 7) & 0x1f)
- outb(1, qbase + 3); /* clear fifo */
- while (inb(qbase + 5)); /* clear ints */
- REG1;
- outb(1, qbase + 8); /* set for PIO pseudo DMA */
- outb(0, qbase + 0xb); /* disable ints */
- inb(qbase + 8); /* clear int bits */
- REG0;
- outb(0x40, qbase + 0xb); /* enable features */
-
- /* configurables */
- outb(qlcfgc, qbase + 0xc);
- /* config: no reset interrupt, (initiator) bus id */
- outb(0x40 | qlcfg8 | priv->qinitid, qbase + 8);
- outb(qlcfg7, qbase + 7);
- outb(qlcfg6, qbase + 6);
- /**/ outb(qlcfg5, qbase + 5); /* select timer */
- outb(qlcfg9 & 7, qbase + 9); /* prescaler */
-/* outb(0x99, qbase + 5); */
- outb(cmd->device->id, qbase + 4);
-
- for (i = 0; i < cmd->cmd_len; i++)
- outb(cmd->cmnd[i], qbase + 2);
-
- priv->qlcmd = cmd;
- outb(0x41, qbase + 3); /* select and send command */
-}
-
-/*
- * Process scsi command - usually after interrupt
- */
-
-static unsigned int ql_pcmd(Scsi_Cmnd * cmd)
-{
- unsigned int i, j;
- unsigned long k;
- unsigned int result; /* ultimate return result */
- unsigned int status; /* scsi returned status */
- unsigned int message; /* scsi returned message */
- unsigned int phase; /* recorded scsi phase */
- unsigned int reqlen; /* total length of transfer */
- struct scatterlist *sglist; /* scatter-gather list pointer */
- unsigned int sgcount; /* sg counter */
- char *buf;
- struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
- int qbase = priv->qbase;
- int int_type = priv->int_type;
-
- rtrc(1)
- j = inb(qbase + 6);
- i = inb(qbase + 5);
- if (i == 0x20) {
- return (DID_NO_CONNECT << 16);
- }
- i |= inb(qbase + 5); /* the 0x10 bit can be set after the 0x08 */
- if (i != 0x18) {
- printk(KERN_ERR "Ql:Bad Interrupt status:%02x\n", i);
- ql_zap(priv);
- return (DID_BAD_INTR << 16);
- }
- j &= 7; /* j = inb( qbase + 7 ) >> 5; */
-
- /* correct status is supposed to be step 4 */
- /* it sometimes returns step 3 but with 0 bytes left to send */
- /* We can try stuffing the FIFO with the max each time, but we will get a
- sequence of 3 if any bytes are left (but we do flush the FIFO anyway */
-
- if (j != 3 && j != 4) {
- printk(KERN_ERR "Ql:Bad sequence for command %d, int %02X, cmdleft = %d\n",
- j, i, inb(qbase + 7) & 0x1f);
- ql_zap(priv);
- return (DID_ERROR << 16);
- }
- result = DID_OK;
- if (inb(qbase + 7) & 0x1f) /* if some bytes in fifo */
- outb(1, qbase + 3); /* clear fifo */
- /* note that request_bufflen is the total xfer size when sg is used */
- reqlen = cmd->request_bufflen;
- /* note that it won't work if transfers > 16M are requested */
- if (reqlen && !((phase = inb(qbase + 4)) & 6)) { /* data phase */
- rtrc(2)
- outb(reqlen, qbase); /* low-mid xfer cnt */
- outb(reqlen >> 8, qbase + 1); /* low-mid xfer cnt */
- outb(reqlen >> 16, qbase + 0xe); /* high xfer cnt */
- outb(0x90, qbase + 3); /* command do xfer */
- /* PIO pseudo DMA to buffer or sglist */
- REG1;
- if (!cmd->use_sg)
- ql_pdma(priv, phase, cmd->request_buffer,
- cmd->request_bufflen);
- else {
- sgcount = cmd->use_sg;
- sglist = cmd->request_buffer;
- while (sgcount--) {
- if (priv->qabort) {
- REG0;
- return ((priv->qabort == 1 ?
- DID_ABORT : DID_RESET) << 16);
- }
- buf = page_address(sglist->page) + sglist->offset;
- if (ql_pdma(priv, phase, buf, sglist->length))
- break;
- sglist++;
- }
- }
- REG0;
- rtrc(2)
- /*
- * Wait for irq (split into second state of irq handler
- * if this can take time)
- */
- if ((k = ql_wai(priv)))
- return (k << 16);
- k = inb(qbase + 5); /* should be 0x10, bus service */
- }
-
- /*
- * Enter Status (and Message In) Phase
- */
-
- k = jiffies + WATCHDOG;
-
- while (time_before(jiffies, k) && !priv->qabort &&
- !(inb(qbase + 4) & 6))
- cpu_relax(); /* wait for status phase */
-
- if (time_after_eq(jiffies, k)) {
- ql_zap(priv);
- return (DID_TIME_OUT << 16);
- }
-
- /* FIXME: timeout ?? */
- while (inb(qbase + 5))
- cpu_relax(); /* clear pending ints */
-
- if (priv->qabort)
- return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
-
- outb(0x11, qbase + 3); /* get status and message */
- if ((k = ql_wai(priv)))
- return (k << 16);
- i = inb(qbase + 5); /* get chip irq stat */
- j = inb(qbase + 7) & 0x1f; /* and bytes rec'd */
- status = inb(qbase + 2);
- message = inb(qbase + 2);
-
- /*
- * Should get function complete int if Status and message, else
- * bus serv if only status
- */
- if (!((i == 8 && j == 2) || (i == 0x10 && j == 1))) {
- printk(KERN_ERR "Ql:Error during status phase, int=%02X, %d bytes recd\n", i, j);
- result = DID_ERROR;
- }
- outb(0x12, qbase + 3); /* done, disconnect */
- rtrc(1)
- if ((k = ql_wai(priv)))
- return (k << 16);
-
- /*
- * Should get bus service interrupt and disconnect interrupt
- */
-
- i = inb(qbase + 5); /* should be bus service */
- while (!priv->qabort && ((i & 0x20) != 0x20)) {
- barrier();
- cpu_relax();
- i |= inb(qbase + 5);
- }
- rtrc(0)
-
- if (priv->qabort)
- return ((priv->qabort == 1 ? DID_ABORT : DID_RESET) << 16);
-
- return (result << 16) | (message << 8) | (status & STATUS_MASK);
-}
-
-/*
- * Interrupt handler
- */
-
-static void ql_ihandl(int irq, void *dev_id, struct pt_regs *regs)
-{
- Scsi_Cmnd *icmd;
- struct Scsi_Host *host = (struct Scsi_Host *)dev_id;
- struct qlogicfas408_priv *priv = get_priv_by_host(host);
- int qbase = priv->qbase;
- REG0;
-
- if (!(inb(qbase + 4) & 0x80)) /* false alarm? */
- return;
-
- if (priv->qlcmd == NULL) { /* no command to process? */
- int i;
- i = 16;
- while (i-- && inb(qbase + 5)); /* maybe also ql_zap() */
- return;
- }
- icmd = priv->qlcmd;
- icmd->result = ql_pcmd(icmd);
- priv->qlcmd = NULL;
- /*
- * If result is CHECK CONDITION done calls qcommand to request
- * sense
- */
- (icmd->scsi_done) (icmd);
-}
-
-irqreturn_t qlogicfas408_ihandl(int irq, void *dev_id, struct pt_regs *regs)
-{
- unsigned long flags;
- struct Scsi_Host *host = dev_id;
-
- spin_lock_irqsave(host->host_lock, flags);
- ql_ihandl(irq, dev_id, regs);
- spin_unlock_irqrestore(host->host_lock, flags);
- return IRQ_HANDLED;
-}
-
-/*
- * Queued command
- */
-
-int qlogicfas408_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
-{
- struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
- if (cmd->device->id == priv->qinitid) {
- cmd->result = DID_BAD_TARGET << 16;
- done(cmd);
- return 0;
- }
-
- cmd->scsi_done = done;
- /* wait for the last command's interrupt to finish */
- while (priv->qlcmd != NULL) {
- barrier();
- cpu_relax();
- }
- ql_icmd(cmd);
- return 0;
-}
-
-/*
- * Return bios parameters
- */
-
-int qlogicfas408_biosparam(struct scsi_device * disk,
- struct block_device *dev,
- sector_t capacity, int ip[])
-{
-/* This should mimic the DOS Qlogic driver's behavior exactly */
- ip[0] = 0x40;
- ip[1] = 0x20;
- ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
- if (ip[2] > 1024) {
- ip[0] = 0xff;
- ip[1] = 0x3f;
- ip[2] = (unsigned long) capacity / (ip[0] * ip[1]);
-#if 0
- if (ip[2] > 1023)
- ip[2] = 1023;
-#endif
- }
- return 0;
-}
-
-/*
- * Abort a command in progress
- */
-
-int qlogicfas408_abort(Scsi_Cmnd * cmd)
-{
- struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
- priv->qabort = 1;
- ql_zap(priv);
- return SUCCESS;
-}
-
-/*
- * Reset SCSI bus
- * FIXME: This function is invoked with cmd = NULL directly by
- * the PCMCIA qlogic_stub code. This wants fixing
- */
-
-int qlogicfas408_bus_reset(Scsi_Cmnd * cmd)
-{
- struct qlogicfas408_priv *priv = get_priv_by_cmd(cmd);
- priv->qabort = 2;
- ql_zap(priv);
- return SUCCESS;
-}
-
-/*
- * Reset SCSI host controller
- */
-
-int qlogicfas408_host_reset(Scsi_Cmnd * cmd)
-{
- return FAILED;
-}
-
-/*
- * Reset SCSI device
- */
-
-int qlogicfas408_device_reset(Scsi_Cmnd * cmd)
-{
- return FAILED;
-}
-
-/*
- * Return info string
- */
-
-const char *qlogicfas408_info(struct Scsi_Host *host)
-{
- struct qlogicfas408_priv *priv = get_priv_by_host(host);
- return priv->qinfo;
-}
-
-/*
- * Get type of chip
- */
-
-int qlogicfas408_get_chip_type(int qbase, int int_type)
-{
- REG1;
- return inb(qbase + 0xe) & 0xf8;
-}
-
-/*
- * Perform initialization tasks
- */
-
-void qlogicfas408_setup(int qbase, int id, int int_type)
-{
- outb(1, qbase + 8); /* set for PIO pseudo DMA */
- REG0;
- outb(0x40 | qlcfg8 | id, qbase + 8); /* (ini) bus id, disable scsi rst */
- outb(qlcfg5, qbase + 5); /* select timer */
- outb(qlcfg9, qbase + 9); /* prescaler */
-
-#if QL_RESET_AT_START
- outb(3, qbase + 3);
-
- REG1;
- /* FIXME: timeout */
- while (inb(qbase + 0xf) & 4)
- cpu_relax();
-
- REG0;
-#endif
-}
-
-/*
- * Checks if this is a QLogic FAS 408
- */
-
-int qlogicfas408_detect(int qbase, int int_type)
-{
- REG1;
- return (((inb(qbase + 0xe) ^ inb(qbase + 0xe)) == 7) &&
- ((inb(qbase + 0xe) ^ inb(qbase + 0xe)) == 7));
-}
-
-/*
- * Disable interrupts
- */
-
-void qlogicfas408_disable_ints(struct qlogicfas408_priv *priv)
-{
- int qbase = priv->qbase;
- int int_type = priv->int_type;
-
- REG1;
- outb(0, qbase + 0xb); /* disable ints */
-}
-
-/*
- * Init and exit functions
- */
-
-static int __init qlogicfas408_init(void)
-{
- return 0;
-}
-
-static void __exit qlogicfas408_exit(void)
-{
-
-}
-
-MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
-MODULE_DESCRIPTION("Driver for the Qlogic FAS SCSI controllers");
-MODULE_LICENSE("GPL");
-module_init(qlogicfas408_init);
-module_exit(qlogicfas408_exit);
-
-EXPORT_SYMBOL(qlogicfas408_info);
-EXPORT_SYMBOL(qlogicfas408_queuecommand);
-EXPORT_SYMBOL(qlogicfas408_abort);
-EXPORT_SYMBOL(qlogicfas408_bus_reset);
-EXPORT_SYMBOL(qlogicfas408_device_reset);
-EXPORT_SYMBOL(qlogicfas408_host_reset);
-EXPORT_SYMBOL(qlogicfas408_biosparam);
-EXPORT_SYMBOL(qlogicfas408_ihandl);
-EXPORT_SYMBOL(qlogicfas408_get_chip_type);
-EXPORT_SYMBOL(qlogicfas408_setup);
-EXPORT_SYMBOL(qlogicfas408_detect);
-EXPORT_SYMBOL(qlogicfas408_disable_ints);
-
+++ /dev/null
-/*
- * sata_sx4.c - Promise SATA
- *
- * Maintained by: Jeff Garzik <jgarzik@pobox.com>
- * Please ALWAYS copy linux-ide@vger.kernel.org
- * on emails.
- *
- * Copyright 2003-2004 Red Hat, Inc.
- *
- * The contents of this file are subject to the Open
- * Software License version 1.1 that can be found at
- * http://www.opensource.org/licenses/osl-1.1.txt and is included herein
- * by reference.
- *
- * Alternatively, the contents of this file may be used under the terms
- * of the GNU General Public License version 2 (the "GPL") as distributed
- * in the kernel source COPYING file, in which case the provisions of
- * the GPL are applicable instead of the above. If you wish to allow
- * the use of your version of this file only under the terms of the
- * GPL and not to allow others to use your version of this file under
- * the OSL, indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by the GPL.
- * If you do not delete the provisions above, a recipient may use your
- * version of this file under either the OSL or the GPL.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/blkdev.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-#include <linux/libata.h>
-#include <asm/io.h>
-#include "sata_promise.h"
-
-#define DRV_NAME "sata_sx4"
-#define DRV_VERSION "0.50"
-
-
-enum {
- PDC_PRD_TBL = 0x44, /* Direct command DMA table addr */
-
- PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
- PDC_HDMA_PKT_SUBMIT = 0x100, /* Host DMA packet pointer addr */
- PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
- PDC_HDMA_CTLSTAT = 0x12C, /* Host DMA control / status */
-
- PDC_20621_SEQCTL = 0x400,
- PDC_20621_SEQMASK = 0x480,
- PDC_20621_GENERAL_CTL = 0x484,
- PDC_20621_PAGE_SIZE = (32 * 1024),
-
- /* chosen, not constant, values; we design our own DIMM mem map */
- PDC_20621_DIMM_WINDOW = 0x0C, /* page# for 32K DIMM window */
- PDC_20621_DIMM_BASE = 0x00200000,
- PDC_20621_DIMM_DATA = (64 * 1024),
- PDC_DIMM_DATA_STEP = (256 * 1024),
- PDC_DIMM_WINDOW_STEP = (8 * 1024),
- PDC_DIMM_HOST_PRD = (6 * 1024),
- PDC_DIMM_HOST_PKT = (128 * 0),
- PDC_DIMM_HPKT_PRD = (128 * 1),
- PDC_DIMM_ATA_PKT = (128 * 2),
- PDC_DIMM_APKT_PRD = (128 * 3),
- PDC_DIMM_HEADER_SZ = PDC_DIMM_APKT_PRD + 128,
- PDC_PAGE_WINDOW = 0x40,
- PDC_PAGE_DATA = PDC_PAGE_WINDOW +
- (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE),
- PDC_PAGE_SET = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE,
-
- PDC_CHIP0_OFS = 0xC0000, /* offset of chip #0 */
-
- PDC_20621_ERR_MASK = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
- (1<<23),
-
- board_20621 = 0, /* FastTrak S150 SX4 */
-
- PDC_RESET = (1 << 11), /* HDMA reset */
-
- PDC_MAX_HDMA = 32,
- PDC_HDMA_Q_MASK = (PDC_MAX_HDMA - 1),
-
- PDC_DIMM0_SPD_DEV_ADDRESS = 0x50,
- PDC_DIMM1_SPD_DEV_ADDRESS = 0x51,
- PDC_MAX_DIMM_MODULE = 0x02,
- PDC_I2C_CONTROL_OFFSET = 0x48,
- PDC_I2C_ADDR_DATA_OFFSET = 0x4C,
- PDC_DIMM0_CONTROL_OFFSET = 0x80,
- PDC_DIMM1_CONTROL_OFFSET = 0x84,
- PDC_SDRAM_CONTROL_OFFSET = 0x88,
- PDC_I2C_WRITE = 0x00000000,
- PDC_I2C_READ = 0x00000040,
- PDC_I2C_START = 0x00000080,
- PDC_I2C_MASK_INT = 0x00000020,
- PDC_I2C_COMPLETE = 0x00010000,
- PDC_I2C_NO_ACK = 0x00100000,
- PDC_DIMM_SPD_SUBADDRESS_START = 0x00,
- PDC_DIMM_SPD_SUBADDRESS_END = 0x7F,
- PDC_DIMM_SPD_ROW_NUM = 3,
- PDC_DIMM_SPD_COLUMN_NUM = 4,
- PDC_DIMM_SPD_MODULE_ROW = 5,
- PDC_DIMM_SPD_TYPE = 11,
- PDC_DIMM_SPD_FRESH_RATE = 12,
- PDC_DIMM_SPD_BANK_NUM = 17,
- PDC_DIMM_SPD_CAS_LATENCY = 18,
- PDC_DIMM_SPD_ATTRIBUTE = 21,
- PDC_DIMM_SPD_ROW_PRE_CHARGE = 27,
- PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28,
- PDC_DIMM_SPD_RAS_CAS_DELAY = 29,
- PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30,
- PDC_DIMM_SPD_SYSTEM_FREQ = 126,
- PDC_CTL_STATUS = 0x08,
- PDC_DIMM_WINDOW_CTLR = 0x0C,
- PDC_TIME_CONTROL = 0x3C,
- PDC_TIME_PERIOD = 0x40,
- PDC_TIME_COUNTER = 0x44,
- PDC_GENERAL_CTLR = 0x484,
- PCI_PLL_INIT = 0x8A531824,
- PCI_X_TCOUNT = 0xEE1E5CFF
-};
-
-
-struct pdc_port_priv {
- u8 dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512];
- u8 *pkt;
- dma_addr_t pkt_dma;
-};
-
-struct pdc_host_priv {
- void *dimm_mmio;
-
- unsigned int doing_hdma;
- unsigned int hdma_prod;
- unsigned int hdma_cons;
- struct {
- struct ata_queued_cmd *qc;
- unsigned int seq;
- unsigned long pkt_ofs;
- } hdma[32];
-};
-
-
-static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static void pdc20621_dma_setup(struct ata_queued_cmd *qc);
-static void pdc20621_dma_start(struct ata_queued_cmd *qc);
-static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
-static void pdc_eng_timeout(struct ata_port *ap);
-static void pdc_20621_phy_reset (struct ata_port *ap);
-static int pdc_port_start(struct ata_port *ap);
-static void pdc_port_stop(struct ata_port *ap);
-static void pdc20621_fill_sg(struct ata_queued_cmd *qc);
-static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf);
-static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf);
-static void pdc20621_host_stop(struct ata_host_set *host_set);
-static inline void pdc_dma_complete (struct ata_port *ap,
- struct ata_queued_cmd *qc, int have_err);
-static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe);
-static int pdc20621_detect_dimm(struct ata_probe_ent *pe);
-static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe,
- u32 device, u32 subaddr, u32 *pdata);
-static int pdc20621_prog_dimm0(struct ata_probe_ent *pe);
-static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe);
-#ifdef ATA_VERBOSE_DEBUG
-static void pdc20621_get_from_dimm(struct ata_probe_ent *pe,
- void *psource, u32 offset, u32 size);
-#endif
-static void pdc20621_put_to_dimm(struct ata_probe_ent *pe,
- void *psource, u32 offset, u32 size);
-
-
-static Scsi_Host_Template pdc_sata_sht = {
- .module = THIS_MODULE,
- .name = DRV_NAME,
- .queuecommand = ata_scsi_queuecmd,
- .eh_strategy_handler = ata_scsi_error,
- .can_queue = ATA_DEF_QUEUE,
- .this_id = ATA_SHT_THIS_ID,
- .sg_tablesize = LIBATA_MAX_PRD,
- .max_sectors = ATA_MAX_SECTORS,
- .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
- .emulated = ATA_SHT_EMULATED,
- .use_clustering = ATA_SHT_USE_CLUSTERING,
- .proc_name = DRV_NAME,
- .dma_boundary = ATA_DMA_BOUNDARY,
- .slave_configure = ata_scsi_slave_config,
- .bios_param = ata_std_bios_param,
-};
-
-static struct ata_port_operations pdc_20621_ops = {
- .port_disable = ata_port_disable,
- .tf_load = pdc_tf_load_mmio,
- .tf_read = ata_tf_read_mmio,
- .check_status = ata_check_status_mmio,
- .exec_command = pdc_exec_command_mmio,
- .phy_reset = pdc_20621_phy_reset,
- .bmdma_setup = pdc20621_dma_setup,
- .bmdma_start = pdc20621_dma_start,
- .fill_sg = pdc20621_fill_sg,
- .eng_timeout = pdc_eng_timeout,
- .irq_handler = pdc20621_interrupt,
- .port_start = pdc_port_start,
- .port_stop = pdc_port_stop,
- .host_stop = pdc20621_host_stop,
-};
-
-static struct ata_port_info pdc_port_info[] = {
- /* board_20621 */
- {
- .sht = &pdc_sata_sht,
- .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
- ATA_FLAG_SRST | ATA_FLAG_MMIO,
- .pio_mask = 0x03, /* pio3-4 */
- .udma_mask = 0x7f, /* udma0-6 ; FIXME */
- .port_ops = &pdc_20621_ops,
- },
-
-};
-
-static struct pci_device_id pdc_sata_pci_tbl[] = {
- { PCI_VENDOR_ID_PROMISE, 0x6622, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
- board_20621 },
- { } /* terminate list */
-};
-
-
-static struct pci_driver pdc_sata_pci_driver = {
- .name = DRV_NAME,
- .id_table = pdc_sata_pci_tbl,
- .probe = pdc_sata_init_one,
- .remove = ata_pci_remove_one,
-};
-
-
-static void pdc20621_host_stop(struct ata_host_set *host_set)
-{
- struct pdc_host_priv *hpriv = host_set->private_data;
- void *dimm_mmio = hpriv->dimm_mmio;
-
- iounmap(dimm_mmio);
- kfree(hpriv);
-}
-
-static int pdc_port_start(struct ata_port *ap)
-{
- struct pci_dev *pdev = ap->host_set->pdev;
- struct pdc_port_priv *pp;
- int rc;
-
- rc = ata_port_start(ap);
- if (rc)
- return rc;
-
- pp = kmalloc(sizeof(*pp), GFP_KERNEL);
- if (!pp) {
- rc = -ENOMEM;
- goto err_out;
- }
- memset(pp, 0, sizeof(*pp));
-
- pp->pkt = pci_alloc_consistent(pdev, 128, &pp->pkt_dma);
- if (!pp->pkt) {
- rc = -ENOMEM;
- goto err_out_kfree;
- }
-
- ap->private_data = pp;
-
- return 0;
-
-err_out_kfree:
- kfree(pp);
-err_out:
- ata_port_stop(ap);
- return rc;
-}
-
-
-static void pdc_port_stop(struct ata_port *ap)
-{
- struct pci_dev *pdev = ap->host_set->pdev;
- struct pdc_port_priv *pp = ap->private_data;
-
- ap->private_data = NULL;
- pci_free_consistent(pdev, 128, pp->pkt, pp->pkt_dma);
- kfree(pp);
- ata_port_stop(ap);
-}
-
-
-static void pdc_20621_phy_reset (struct ata_port *ap)
-{
- VPRINTK("ENTER\n");
- ap->cbl = ATA_CBL_SATA;
- ata_port_probe(ap);
- ata_bus_reset(ap);
-}
-
-static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
- unsigned int portno,
- unsigned int total_len)
-{
- u32 addr;
- unsigned int dw = PDC_DIMM_APKT_PRD >> 2;
- u32 *buf32 = (u32 *) buf;
-
- /* output ATA packet S/G table */
- addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
- (PDC_DIMM_DATA_STEP * portno);
- VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr);
- buf32[dw] = cpu_to_le32(addr);
- buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
-
- VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n",
- PDC_20621_DIMM_BASE +
- (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_APKT_PRD,
- buf32[dw], buf32[dw + 1]);
-}
-
-static inline void pdc20621_host_sg(struct ata_taskfile *tf, u8 *buf,
- unsigned int portno,
- unsigned int total_len)
-{
- u32 addr;
- unsigned int dw = PDC_DIMM_HPKT_PRD >> 2;
- u32 *buf32 = (u32 *) buf;
-
- /* output Host DMA packet S/G table */
- addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA +
- (PDC_DIMM_DATA_STEP * portno);
-
- buf32[dw] = cpu_to_le32(addr);
- buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT);
-
- VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n",
- PDC_20621_DIMM_BASE +
- (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_HPKT_PRD,
- buf32[dw], buf32[dw + 1]);
-}
-
-static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf,
- unsigned int devno, u8 *buf,
- unsigned int portno)
-{
- unsigned int i, dw;
- u32 *buf32 = (u32 *) buf;
- u8 dev_reg;
-
- unsigned int dimm_sg = PDC_20621_DIMM_BASE +
- (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_APKT_PRD;
- VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
-
- i = PDC_DIMM_ATA_PKT;
-
- /*
- * Set up ATA packet
- */
- if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
- buf[i++] = PDC_PKT_READ;
- else if (tf->protocol == ATA_PROT_NODATA)
- buf[i++] = PDC_PKT_NODATA;
- else
- buf[i++] = 0;
- buf[i++] = 0; /* reserved */
- buf[i++] = portno + 1; /* seq. id */
- buf[i++] = 0xff; /* delay seq. id */
-
- /* dimm dma S/G, and next-pkt */
- dw = i >> 2;
- buf32[dw] = cpu_to_le32(dimm_sg);
- buf32[dw + 1] = 0;
- i += 8;
-
- if (devno == 0)
- dev_reg = ATA_DEVICE_OBS;
- else
- dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
-
- /* select device */
- buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
- buf[i++] = dev_reg;
-
- /* device control register */
- buf[i++] = (1 << 5) | PDC_REG_DEVCTL;
- buf[i++] = tf->ctl;
-
- return i;
-}
-
-static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf,
- unsigned int portno)
-{
- unsigned int dw;
- u32 tmp, *buf32 = (u32 *) buf;
-
- unsigned int host_sg = PDC_20621_DIMM_BASE +
- (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_HOST_PRD;
- unsigned int dimm_sg = PDC_20621_DIMM_BASE +
- (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_HPKT_PRD;
- VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg);
- VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg);
-
- dw = PDC_DIMM_HOST_PKT >> 2;
-
- /*
- * Set up Host DMA packet
- */
- if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE)))
- tmp = PDC_PKT_READ;
- else
- tmp = 0;
- tmp |= ((portno + 1 + 4) << 16); /* seq. id */
- tmp |= (0xff << 24); /* delay seq. id */
- buf32[dw + 0] = cpu_to_le32(tmp);
- buf32[dw + 1] = cpu_to_le32(host_sg);
- buf32[dw + 2] = cpu_to_le32(dimm_sg);
- buf32[dw + 3] = 0;
-
- VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n",
- PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) +
- PDC_DIMM_HOST_PKT,
- buf32[dw + 0],
- buf32[dw + 1],
- buf32[dw + 2],
- buf32[dw + 3]);
-}
-
-static void pdc20621_fill_sg(struct ata_queued_cmd *qc)
-{
- struct scatterlist *sg = qc->sg;
- struct ata_port *ap = qc->ap;
- struct pdc_port_priv *pp = ap->private_data;
- void *mmio = ap->host_set->mmio_base;
- struct pdc_host_priv *hpriv = ap->host_set->private_data;
- void *dimm_mmio = hpriv->dimm_mmio;
- unsigned int portno = ap->port_no;
- unsigned int i, last, idx, total_len = 0, sgt_len;
- u32 *buf = (u32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ];
-
- VPRINTK("ata%u: ENTER\n", ap->id);
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- /*
- * Build S/G table
- */
- last = qc->n_elem;
- idx = 0;
- for (i = 0; i < last; i++) {
- buf[idx++] = cpu_to_le32(sg_dma_address(&sg[i]));
- buf[idx++] = cpu_to_le32(sg_dma_len(&sg[i]));
- total_len += sg[i].length;
- }
- buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT);
- sgt_len = idx * 4;
-
- /*
- * Build ATA, host DMA packets
- */
- pdc20621_host_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
- pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno);
-
- pdc20621_ata_sg(&qc->tf, &pp->dimm_buf[0], portno, total_len);
- i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno);
-
- if (qc->tf.flags & ATA_TFLAG_LBA48)
- i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i);
- else
- i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i);
-
- pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i);
-
- /* copy three S/G tables and two packets to DIMM MMIO window */
- memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP),
- &pp->dimm_buf, PDC_DIMM_HEADER_SZ);
- memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) +
- PDC_DIMM_HOST_PRD,
- &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len);
-
- /* force host FIFO dump */
- writel(0x00000001, mmio + PDC_20621_GENERAL_CTL);
-
- readl(dimm_mmio); /* MMIO PCI posting flush */
-
- VPRINTK("ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len);
-}
-
-static void __pdc20621_push_hdma(struct ata_queued_cmd *qc,
- unsigned int seq,
- u32 pkt_ofs)
-{
- struct ata_port *ap = qc->ap;
- struct ata_host_set *host_set = ap->host_set;
- void *mmio = host_set->mmio_base;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
- readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
-
- writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT);
- readl(mmio + PDC_HDMA_PKT_SUBMIT); /* flush */
-}
-
-static void pdc20621_push_hdma(struct ata_queued_cmd *qc,
- unsigned int seq,
- u32 pkt_ofs)
-{
- struct ata_port *ap = qc->ap;
- struct pdc_host_priv *pp = ap->host_set->private_data;
- unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK;
-
- if (!pp->doing_hdma) {
- __pdc20621_push_hdma(qc, seq, pkt_ofs);
- pp->doing_hdma = 1;
- return;
- }
-
- pp->hdma[idx].qc = qc;
- pp->hdma[idx].seq = seq;
- pp->hdma[idx].pkt_ofs = pkt_ofs;
- pp->hdma_prod++;
-}
-
-static void pdc20621_pop_hdma(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct pdc_host_priv *pp = ap->host_set->private_data;
- unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK;
-
- /* if nothing on queue, we're done */
- if (pp->hdma_prod == pp->hdma_cons) {
- pp->doing_hdma = 0;
- return;
- }
-
- __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq,
- pp->hdma[idx].pkt_ofs);
- pp->hdma_cons++;
-}
-
-#ifdef ATA_VERBOSE_DEBUG
-static void pdc20621_dump_hdma(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int port_no = ap->port_no;
- struct pdc_host_priv *hpriv = ap->host_set->private_data;
- void *dimm_mmio = hpriv->dimm_mmio;
-
- dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP);
- dimm_mmio += PDC_DIMM_HOST_PKT;
-
- printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio));
- printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4));
- printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8));
- printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12));
-}
-#else
-static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { }
-#endif /* ATA_VERBOSE_DEBUG */
-
-static void pdc20621_dma_setup(struct ata_queued_cmd *qc)
-{
- /* nothing for now. later, we will call standard
- * code in libata-core for ATAPI here */
-}
-
-static void pdc20621_dma_start(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct ata_host_set *host_set = ap->host_set;
- unsigned int port_no = ap->port_no;
- void *mmio = host_set->mmio_base;
- unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
- u8 seq = (u8) (port_no + 1);
- unsigned int doing_hdma = 0, port_ofs;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- VPRINTK("ata%u: ENTER\n", ap->id);
-
- port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
-
- /* if writing, we (1) DMA to DIMM, then (2) do ATA command */
- if (rw) {
- doing_hdma = 1;
- seq += 4;
- }
-
- wmb(); /* flush PRD, pkt writes */
-
- if (doing_hdma) {
- pdc20621_dump_hdma(qc);
- pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT);
- VPRINTK("queued ofs 0x%x (%u), seq %u\n",
- port_ofs + PDC_DIMM_HOST_PKT,
- port_ofs + PDC_DIMM_HOST_PKT,
- seq);
- } else {
- writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
- readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */
-
- writel(port_ofs + PDC_DIMM_ATA_PKT,
- (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
- readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
- VPRINTK("submitted ofs 0x%x (%u), seq %u\n",
- port_ofs + PDC_DIMM_ATA_PKT,
- port_ofs + PDC_DIMM_ATA_PKT,
- seq);
- }
-}
-
-static inline unsigned int pdc20621_host_intr( struct ata_port *ap,
- struct ata_queued_cmd *qc,
- unsigned int doing_hdma,
- void *mmio)
-{
- unsigned int port_no = ap->port_no;
- unsigned int port_ofs =
- PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no);
- u8 status;
- unsigned int handled = 0;
-
- VPRINTK("ENTER\n");
-
- if ((qc->tf.protocol == ATA_PROT_DMA) && /* read */
- (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
-
- /* step two - DMA from DIMM to host */
- if (doing_hdma) {
- VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->id,
- readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
- pdc_dma_complete(ap, qc, 0);
- pdc20621_pop_hdma(qc);
- }
-
- /* step one - exec ATA command */
- else {
- u8 seq = (u8) (port_no + 1 + 4);
- VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->id,
- readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
-
- /* submit hdma pkt */
- pdc20621_dump_hdma(qc);
- pdc20621_push_hdma(qc, seq,
- port_ofs + PDC_DIMM_HOST_PKT);
- }
- handled = 1;
-
- } else if (qc->tf.protocol == ATA_PROT_DMA) { /* write */
-
- /* step one - DMA from host to DIMM */
- if (doing_hdma) {
- u8 seq = (u8) (port_no + 1);
- VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->id,
- readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
-
- /* submit ata pkt */
- writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4));
- readl(mmio + PDC_20621_SEQCTL + (seq * 4));
- writel(port_ofs + PDC_DIMM_ATA_PKT,
- (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
- readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
- }
-
- /* step two - execute ATA command */
- else {
- VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->id,
- readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT));
- pdc_dma_complete(ap, qc, 0);
- pdc20621_pop_hdma(qc);
- }
- handled = 1;
-
- /* command completion, but no data xfer */
- } else if (qc->tf.protocol == ATA_PROT_NODATA) {
-
- status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
- DPRINTK("BUS_NODATA (drv_stat 0x%X)\n", status);
- ata_qc_complete(qc, status);
- handled = 1;
-
- } else {
- ap->stats.idle_irq++;
- }
-
- return handled;
-}
-
-static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
-{
- struct ata_host_set *host_set = dev_instance;
- struct ata_port *ap;
- u32 mask = 0;
- unsigned int i, tmp, port_no;
- unsigned int handled = 0;
- void *mmio_base;
-
- VPRINTK("ENTER\n");
-
- if (!host_set || !host_set->mmio_base) {
- VPRINTK("QUICK EXIT\n");
- return IRQ_NONE;
- }
-
- mmio_base = host_set->mmio_base;
-
- /* reading should also clear interrupts */
- mmio_base += PDC_CHIP0_OFS;
- mask = readl(mmio_base + PDC_20621_SEQMASK);
- VPRINTK("mask == 0x%x\n", mask);
-
- if (mask == 0xffffffff) {
- VPRINTK("QUICK EXIT 2\n");
- return IRQ_NONE;
- }
- mask &= 0xffff; /* only 16 tags possible */
- if (!mask) {
- VPRINTK("QUICK EXIT 3\n");
- return IRQ_NONE;
- }
-
- spin_lock(&host_set->lock);
-
- for (i = 1; i < 9; i++) {
- port_no = i - 1;
- if (port_no > 3)
- port_no -= 4;
- if (port_no >= host_set->n_ports)
- ap = NULL;
- else
- ap = host_set->ports[port_no];
- tmp = mask & (1 << i);
- VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, tmp);
- if (tmp && ap && (!(ap->flags & ATA_FLAG_PORT_DISABLED))) {
- struct ata_queued_cmd *qc;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)))
- handled += pdc20621_host_intr(ap, qc, (i > 4),
- mmio_base);
- }
- }
-
- spin_unlock(&host_set->lock);
-
- VPRINTK("mask == 0x%x\n", mask);
-
- VPRINTK("EXIT\n");
-
- return IRQ_RETVAL(handled);
-}
-
-static inline void pdc_dma_complete (struct ata_port *ap,
- struct ata_queued_cmd *qc,
- int have_err)
-{
- u8 err_bit = have_err ? ATA_ERR : 0;
-
- /* get drive status; clear intr; complete txn */
- ata_qc_complete(qc, ata_wait_idle(ap) | err_bit);
-}
-
-static void pdc_eng_timeout(struct ata_port *ap)
-{
- u8 drv_stat;
- struct ata_queued_cmd *qc;
-
- DPRINTK("ENTER\n");
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- if (!qc) {
- printk(KERN_ERR "ata%u: BUG: timeout without command\n",
- ap->id);
- goto out;
- }
-
- /* hack alert! We cannot use the supplied completion
- * function from inside the ->eh_strategy_handler() thread.
- * libata is the only user of ->eh_strategy_handler() in
- * any kernel, so the default scsi_done() assumes it is
- * not being called from the SCSI EH.
- */
- qc->scsidone = scsi_finish_command;
-
- switch (qc->tf.protocol) {
- case ATA_PROT_DMA:
- printk(KERN_ERR "ata%u: DMA timeout\n", ap->id);
- ata_qc_complete(qc, ata_wait_idle(ap) | ATA_ERR);
- break;
-
- case ATA_PROT_NODATA:
- drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
-
- printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x\n",
- ap->id, qc->tf.command, drv_stat);
-
- ata_qc_complete(qc, drv_stat);
- break;
-
- default:
- drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
-
- printk(KERN_ERR "ata%u: unknown timeout, cmd 0x%x stat 0x%x\n",
- ap->id, qc->tf.command, drv_stat);
-
- ata_qc_complete(qc, drv_stat);
- break;
- }
-
-out:
- DPRINTK("EXIT\n");
-}
-
-static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf)
-{
- if (tf->protocol == ATA_PROT_PIO)
- ata_tf_load_mmio(ap, tf);
-}
-
-
-static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf)
-{
- if (tf->protocol == ATA_PROT_PIO)
- ata_exec_command_mmio(ap, tf);
-}
-
-
-static void pdc_sata_setup_port(struct ata_ioports *port, unsigned long base)
-{
- port->cmd_addr = base;
- port->data_addr = base;
- port->feature_addr =
- port->error_addr = base + 0x4;
- port->nsect_addr = base + 0x8;
- port->lbal_addr = base + 0xc;
- port->lbam_addr = base + 0x10;
- port->lbah_addr = base + 0x14;
- port->device_addr = base + 0x18;
- port->command_addr =
- port->status_addr = base + 0x1c;
- port->altstatus_addr =
- port->ctl_addr = base + 0x38;
-}
-
-
-#ifdef ATA_VERBOSE_DEBUG
-static void pdc20621_get_from_dimm(struct ata_probe_ent *pe, void *psource,
- u32 offset, u32 size)
-{
- u32 window_size;
- u16 idx;
- u8 page_mask;
- long dist;
- void *mmio = pe->mmio_base;
- struct pdc_host_priv *hpriv = pe->private_data;
- void *dimm_mmio = hpriv->dimm_mmio;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- page_mask = 0x00;
- window_size = 0x2000 * 4; /* 32K byte uchar size */
- idx = (u16) (offset / window_size);
-
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
-
- offset -= (idx * window_size);
- idx++;
- dist = ((long) (window_size - (offset + size))) >= 0 ? size :
- (long) (window_size - offset);
- memcpy_fromio((char *) psource, (char *) (dimm_mmio + offset / 4),
- dist);
-
- psource += dist;
- size -= dist;
- for (; (long) size >= (long) window_size ;) {
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
- memcpy_fromio((char *) psource, (char *) (dimm_mmio),
- window_size / 4);
- psource += window_size;
- size -= window_size;
- idx ++;
- }
-
- if (size) {
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
- memcpy_fromio((char *) psource, (char *) (dimm_mmio),
- size / 4);
- }
-}
-#endif
-
-
-static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource,
- u32 offset, u32 size)
-{
- u32 window_size;
- u16 idx;
- u8 page_mask;
- long dist;
- void *mmio = pe->mmio_base;
- struct pdc_host_priv *hpriv = pe->private_data;
- void *dimm_mmio = hpriv->dimm_mmio;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- page_mask = 0x00;
- window_size = 0x2000 * 4; /* 32K byte uchar size */
- idx = (u16) (offset / window_size);
-
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
- offset -= (idx * window_size);
- idx++;
- dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size :
- (long) (window_size - offset);
- memcpy_toio((char *) (dimm_mmio + offset / 4), (char *) psource, dist);
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
-
- psource += dist;
- size -= dist;
- for (; (long) size >= (long) window_size ;) {
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
- memcpy_toio((char *) (dimm_mmio), (char *) psource,
- window_size / 4);
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
- psource += window_size;
- size -= window_size;
- idx ++;
- }
-
- if (size) {
- writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR);
- readl(mmio + PDC_DIMM_WINDOW_CTLR);
- memcpy_toio((char *) (dimm_mmio), (char *) psource, size / 4);
- writel(0x01, mmio + PDC_GENERAL_CTLR);
- readl(mmio + PDC_GENERAL_CTLR);
- }
-}
-
-
-static unsigned int pdc20621_i2c_read(struct ata_probe_ent *pe, u32 device,
- u32 subaddr, u32 *pdata)
-{
- void *mmio = pe->mmio_base;
- u32 i2creg = 0;
- u32 status;
- u32 count =0;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- i2creg |= device << 24;
- i2creg |= subaddr << 16;
-
- /* Set the device and subaddress */
- writel(i2creg, mmio + PDC_I2C_ADDR_DATA_OFFSET);
- readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
-
- /* Write Control to perform read operation, mask int */
- writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT,
- mmio + PDC_I2C_CONTROL_OFFSET);
-
- for (count = 0; count <= 1000; count ++) {
- status = readl(mmio + PDC_I2C_CONTROL_OFFSET);
- if (status & PDC_I2C_COMPLETE) {
- status = readl(mmio + PDC_I2C_ADDR_DATA_OFFSET);
- break;
- } else if (count == 1000)
- return 0;
- }
-
- *pdata = (status >> 8) & 0x000000ff;
- return 1;
-}
-
-
-static int pdc20621_detect_dimm(struct ata_probe_ent *pe)
-{
- u32 data=0 ;
- if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
- PDC_DIMM_SPD_SYSTEM_FREQ, &data)) {
- if (data == 100)
- return 100;
- } else
- return 0;
-
- if (pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) {
- if(data <= 0x75)
- return 133;
- } else
- return 0;
-
- return 0;
-}
-
-
-static int pdc20621_prog_dimm0(struct ata_probe_ent *pe)
-{
- u32 spd0[50];
- u32 data = 0;
- int size, i;
- u8 bdimmsize;
- void *mmio = pe->mmio_base;
- static const struct {
- unsigned int reg;
- unsigned int ofs;
- } pdc_i2c_read_data [] = {
- { PDC_DIMM_SPD_TYPE, 11 },
- { PDC_DIMM_SPD_FRESH_RATE, 12 },
- { PDC_DIMM_SPD_COLUMN_NUM, 4 },
- { PDC_DIMM_SPD_ATTRIBUTE, 21 },
- { PDC_DIMM_SPD_ROW_NUM, 3 },
- { PDC_DIMM_SPD_BANK_NUM, 17 },
- { PDC_DIMM_SPD_MODULE_ROW, 5 },
- { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 },
- { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 },
- { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 },
- { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 },
- { PDC_DIMM_SPD_CAS_LATENCY, 18 },
- };
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- for(i=0; i<ARRAY_SIZE(pdc_i2c_read_data); i++)
- pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
- pdc_i2c_read_data[i].reg,
- &spd0[pdc_i2c_read_data[i].ofs]);
-
- data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4);
- data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) |
- ((((spd0[27] + 9) / 10) - 1) << 8) ;
- data |= (((((spd0[29] > spd0[28])
- ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10;
- data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12;
-
- if (spd0[18] & 0x08)
- data |= ((0x03) << 14);
- else if (spd0[18] & 0x04)
- data |= ((0x02) << 14);
- else if (spd0[18] & 0x01)
- data |= ((0x01) << 14);
- else
- data |= (0 << 14);
-
- /*
- Calculate the size of bDIMMSize (power of 2) and
- merge the DIMM size by program start/end address.
- */
-
- bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3;
- size = (1 << bdimmsize) >> 20; /* size = xxx(MB) */
- data |= (((size / 16) - 1) << 16);
- data |= (0 << 23);
- data |= 8;
- writel(data, mmio + PDC_DIMM0_CONTROL_OFFSET);
- readl(mmio + PDC_DIMM0_CONTROL_OFFSET);
- return size;
-}
-
-
-static unsigned int pdc20621_prog_dimm_global(struct ata_probe_ent *pe)
-{
- u32 data, spd0;
- int error, i;
- void *mmio = pe->mmio_base;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- /*
- Set To Default : DIMM Module Global Control Register (0x022259F1)
- DIMM Arbitration Disable (bit 20)
- DIMM Data/Control Output Driving Selection (bit12 - bit15)
- Refresh Enable (bit 17)
- */
-
- data = 0x022259F1;
- writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
- readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
-
- /* Turn on for ECC */
- pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
- PDC_DIMM_SPD_TYPE, &spd0);
- if (spd0 == 0x02) {
- data |= (0x01 << 16);
- writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
- readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
- printk(KERN_ERR "Local DIMM ECC Enabled\n");
- }
-
- /* DIMM Initialization Select/Enable (bit 18/19) */
- data &= (~(1<<18));
- data |= (1<<19);
- writel(data, mmio + PDC_SDRAM_CONTROL_OFFSET);
-
- error = 1;
- for (i = 1; i <= 10; i++) { /* polling ~5 secs */
- data = readl(mmio + PDC_SDRAM_CONTROL_OFFSET);
- if (!(data & (1<<19))) {
- error = 0;
- break;
- }
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout((i * 100) * HZ / 1000 + 1);
- }
- return error;
-}
-
-
-static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe)
-{
- int speed, size, length;
- u32 addr,spd0,pci_status;
- u32 tmp=0;
- u32 time_period=0;
- u32 tcount=0;
- u32 ticks=0;
- u32 clock=0;
- u32 fparam=0;
- void *mmio = pe->mmio_base;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- /* Initialize PLL based upon PCI Bus Frequency */
-
- /* Initialize Time Period Register */
- writel(0xffffffff, mmio + PDC_TIME_PERIOD);
- time_period = readl(mmio + PDC_TIME_PERIOD);
- VPRINTK("Time Period Register (0x40): 0x%x\n", time_period);
-
- /* Enable timer */
- writel(0x00001a0, mmio + PDC_TIME_CONTROL);
- readl(mmio + PDC_TIME_CONTROL);
-
- /* Wait 3 seconds */
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(3 * HZ);
-
- /*
- When timer is enabled, counter is decreased every internal
- clock cycle.
- */
-
- tcount = readl(mmio + PDC_TIME_COUNTER);
- VPRINTK("Time Counter Register (0x44): 0x%x\n", tcount);
-
- /*
- If SX4 is on PCI-X bus, after 3 seconds, the timer counter
- register should be >= (0xffffffff - 3x10^8).
- */
- if(tcount >= PCI_X_TCOUNT) {
- ticks = (time_period - tcount);
- VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks);
-
- clock = (ticks / 300000);
- VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock);
-
- clock = (clock * 33);
- VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock);
-
- /* PLL F Param (bit 22:16) */
- fparam = (1400000 / clock) - 2;
- VPRINTK("PLL F Param: 0x%x (%d)\n", fparam, fparam);
-
- /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */
- pci_status = (0x8a001824 | (fparam << 16));
- } else
- pci_status = PCI_PLL_INIT;
-
- /* Initialize PLL. */
- VPRINTK("pci_status: 0x%x\n", pci_status);
- writel(pci_status, mmio + PDC_CTL_STATUS);
- readl(mmio + PDC_CTL_STATUS);
-
- /*
- Read SPD of DIMM by I2C interface,
- and program the DIMM Module Controller.
- */
- if (!(speed = pdc20621_detect_dimm(pe))) {
- printk(KERN_ERR "Detect Local DIMM Fail\n");
- return 1; /* DIMM error */
- }
- VPRINTK("Local DIMM Speed = %d\n", speed);
-
- /* Programming DIMM0 Module Control Register (index_CID0:80h) */
- size = pdc20621_prog_dimm0(pe);
- VPRINTK("Local DIMM Size = %dMB\n",size);
-
- /* Programming DIMM Module Global Control Register (index_CID0:88h) */
- if (pdc20621_prog_dimm_global(pe)) {
- printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n");
- return 1;
- }
-
-#ifdef ATA_VERBOSE_DEBUG
- {
- u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ',
- 'N','o','t',' ','Y','e','t',' ','D','e','f','i','n','e','d',' ',
- '1','.','1','0',
- '9','8','0','3','1','6','1','2',0,0};
- u8 test_parttern2[40] = {0};
-
- pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x10040, 40);
- pdc20621_put_to_dimm(pe, (void *) test_parttern2, 0x40, 40);
-
- pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x10040, 40);
- pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
- printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
- test_parttern2[1], &(test_parttern2[2]));
- pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x10040,
- 40);
- printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
- test_parttern2[1], &(test_parttern2[2]));
-
- pdc20621_put_to_dimm(pe, (void *) test_parttern1, 0x40, 40);
- pdc20621_get_from_dimm(pe, (void *) test_parttern2, 0x40, 40);
- printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0],
- test_parttern2[1], &(test_parttern2[2]));
- }
-#endif
-
- /* ECC initiliazation. */
-
- pdc20621_i2c_read(pe, PDC_DIMM0_SPD_DEV_ADDRESS,
- PDC_DIMM_SPD_TYPE, &spd0);
- if (spd0 == 0x02) {
- VPRINTK("Start ECC initialization\n");
- addr = 0;
- length = size * 1024 * 1024;
- while (addr < length) {
- pdc20621_put_to_dimm(pe, (void *) &tmp, addr,
- sizeof(u32));
- addr += sizeof(u32);
- }
- VPRINTK("Finish ECC initialization\n");
- }
- return 0;
-}
-
-
-static void pdc_20621_init(struct ata_probe_ent *pe)
-{
- u32 tmp;
- void *mmio = pe->mmio_base;
-
- /* hard-code chip #0 */
- mmio += PDC_CHIP0_OFS;
-
- /*
- * Select page 0x40 for our 32k DIMM window
- */
- tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000;
- tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */
- writel(tmp, mmio + PDC_20621_DIMM_WINDOW);
-
- /*
- * Reset Host DMA
- */
- tmp = readl(mmio + PDC_HDMA_CTLSTAT);
- tmp |= PDC_RESET;
- writel(tmp, mmio + PDC_HDMA_CTLSTAT);
- readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
-
- udelay(10);
-
- tmp = readl(mmio + PDC_HDMA_CTLSTAT);
- tmp &= ~PDC_RESET;
- writel(tmp, mmio + PDC_HDMA_CTLSTAT);
- readl(mmio + PDC_HDMA_CTLSTAT); /* flush */
-}
-
-static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
-{
- static int printed_version;
- struct ata_probe_ent *probe_ent = NULL;
- unsigned long base;
- void *mmio_base, *dimm_mmio = NULL;
- struct pdc_host_priv *hpriv = NULL;
- unsigned int board_idx = (unsigned int) ent->driver_data;
- int rc;
-
- if (!printed_version++)
- printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
-
- /*
- * If this driver happens to only be useful on Apple's K2, then
- * we should check that here as it has a normal Serverworks ID
- */
- rc = pci_enable_device(pdev);
- if (rc)
- return rc;
-
- rc = pci_request_regions(pdev, DRV_NAME);
- if (rc)
- goto err_out;
-
- rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
- rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
- if (rc)
- goto err_out_regions;
-
- probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
- if (probe_ent == NULL) {
- rc = -ENOMEM;
- goto err_out_regions;
- }
-
- memset(probe_ent, 0, sizeof(*probe_ent));
- probe_ent->pdev = pdev;
- INIT_LIST_HEAD(&probe_ent->node);
-
- mmio_base = ioremap(pci_resource_start(pdev, 3),
- pci_resource_len(pdev, 3));
- if (mmio_base == NULL) {
- rc = -ENOMEM;
- goto err_out_free_ent;
- }
- base = (unsigned long) mmio_base;
-
- hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
- if (!hpriv) {
- rc = -ENOMEM;
- goto err_out_iounmap;
- }
- memset(hpriv, 0, sizeof(*hpriv));
-
- dimm_mmio = ioremap(pci_resource_start(pdev, 4),
- pci_resource_len(pdev, 4));
- if (!dimm_mmio) {
- kfree(hpriv);
- rc = -ENOMEM;
- goto err_out_iounmap;
- }
-
- hpriv->dimm_mmio = dimm_mmio;
-
- probe_ent->sht = pdc_port_info[board_idx].sht;
- probe_ent->host_flags = pdc_port_info[board_idx].host_flags;
- probe_ent->pio_mask = pdc_port_info[board_idx].pio_mask;
- probe_ent->udma_mask = pdc_port_info[board_idx].udma_mask;
- probe_ent->port_ops = pdc_port_info[board_idx].port_ops;
-
- probe_ent->irq = pdev->irq;
- probe_ent->irq_flags = SA_SHIRQ;
- probe_ent->mmio_base = mmio_base;
-
- probe_ent->private_data = hpriv;
- base += PDC_CHIP0_OFS;
-
- pdc_sata_setup_port(&probe_ent->port[0], base + 0x200);
- pdc_sata_setup_port(&probe_ent->port[1], base + 0x280);
-
- /* notice 4-port boards */
- switch (board_idx) {
- case board_20621:
- probe_ent->n_ports = 4;
-
- pdc_sata_setup_port(&probe_ent->port[2], base + 0x300);
- pdc_sata_setup_port(&probe_ent->port[3], base + 0x380);
- break;
- default:
- BUG();
- break;
- }
-
- pci_set_master(pdev);
-
- /* initialize adapter */
- /* initialize local dimm */
- if (pdc20621_dimm_init(probe_ent)) {
- rc = -ENOMEM;
- goto err_out_iounmap_dimm;
- }
- pdc_20621_init(probe_ent);
-
- /* FIXME: check ata_device_add return value */
- ata_device_add(probe_ent);
- kfree(probe_ent);
-
- return 0;
-
-err_out_iounmap_dimm: /* only get to this label if 20621 */
- kfree(hpriv);
- iounmap(dimm_mmio);
-err_out_iounmap:
- iounmap(mmio_base);
-err_out_free_ent:
- kfree(probe_ent);
-err_out_regions:
- pci_release_regions(pdev);
-err_out:
- pci_disable_device(pdev);
- return rc;
-}
-
-
-static int __init pdc_sata_init(void)
-{
- return pci_module_init(&pdc_sata_pci_driver);
-}
-
-
-static void __exit pdc_sata_exit(void)
-{
- pci_unregister_driver(&pdc_sata_pci_driver);
-}
-
-
-MODULE_AUTHOR("Jeff Garzik");
-MODULE_DESCRIPTION("Promise SATA low-level driver");
-MODULE_LICENSE("GPL");
-MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl);
-
-module_init(pdc_sata_init);
-module_exit(pdc_sata_exit);
+++ /dev/null
-/*
- * linux/drivers/video/pxafb.c
- *
- * Copyright (C) 1999 Eric A. Thomas.
- * Copyright (C) 2004 Jean-Frederic Clere.
- * Copyright (C) 2004 Ian Campbell.
- * Copyright (C) 2004 Jeff Lackey.
- * Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas
- * which in turn is
- * Based on acornfb.c Copyright (C) Russell King.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- *
- * Intel PXA250/210 LCD Controller Frame Buffer Driver
- *
- * Please direct your questions and comments on this driver to the following
- * email address:
- *
- * linux-arm-kernel@lists.arm.linux.org.uk
- *
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/fb.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/cpufreq.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-#include <asm/uaccess.h>
-#include <asm/arch/bitfield.h>
-#include <asm/arch/pxafb.h>
-
-/*
- * Complain if VAR is out of range.
- */
-#define DEBUG_VAR 1
-
-#include "pxafb.h"
-
-/* Bits which should not be set in machine configuration structures */
-#define LCCR0_INVALID_CONFIG_MASK (LCCR0_OUM|LCCR0_BM|LCCR0_QDM|LCCR0_DIS|LCCR0_EFM|LCCR0_IUM|LCCR0_SFM|LCCR0_LDM|LCCR0_ENB)
-#define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP|LCCR3_VSP|LCCR3_PCD|LCCR3_BPP)
-
-static void (*pxafb_backlight_power)(int);
-static void (*pxafb_lcd_power)(int);
-
-static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *);
-static void set_ctrlr_state(struct pxafb_info *fbi, u_int state);
-
-#ifdef CONFIG_FB_PXA_PARAMETERS
-#define PXAFB_OPTIONS_SIZE 256
-static char g_options[PXAFB_OPTIONS_SIZE] __initdata = "";
-#endif
-
-static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- /*
- * We need to handle two requests being made at the same time.
- * There are two important cases:
- * 1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
- * We must perform the unblanking, which will do our REENABLE for us.
- * 2. When we are blanking, but immediately unblank before we have
- * blanked. We do the "REENABLE" thing here as well, just to be sure.
- */
- if (fbi->task_state == C_ENABLE && state == C_REENABLE)
- state = (u_int) -1;
- if (fbi->task_state == C_DISABLE && state == C_ENABLE)
- state = C_REENABLE;
-
- if (state != (u_int)-1) {
- fbi->task_state = state;
- schedule_work(&fbi->task);
- }
- local_irq_restore(flags);
-}
-
-static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
-{
- chan &= 0xffff;
- chan >>= 16 - bf->length;
- return chan << bf->offset;
-}
-
-static int
-pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
- u_int trans, struct fb_info *info)
-{
- struct pxafb_info *fbi = (struct pxafb_info *)info;
- u_int val, ret = 1;
-
- if (regno < fbi->palette_size) {
- val = ((red >> 0) & 0xf800);
- val |= ((green >> 5) & 0x07e0);
- val |= ((blue >> 11) & 0x001f);
-
- fbi->palette_cpu[regno] = val;
- ret = 0;
- }
- return ret;
-}
-
-static int
-pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int trans, struct fb_info *info)
-{
- struct pxafb_info *fbi = (struct pxafb_info *)info;
- unsigned int val;
- int ret = 1;
-
- /*
- * If inverse mode was selected, invert all the colours
- * rather than the register number. The register number
- * is what you poke into the framebuffer to produce the
- * colour you requested.
- */
- if (fbi->cmap_inverse) {
- red = 0xffff - red;
- green = 0xffff - green;
- blue = 0xffff - blue;
- }
-
- /*
- * If greyscale is true, then we convert the RGB value
- * to greyscale no matter what visual we are using.
- */
- if (fbi->fb.var.grayscale)
- red = green = blue = (19595 * red + 38470 * green +
- 7471 * blue) >> 16;
-
- switch (fbi->fb.fix.visual) {
- case FB_VISUAL_TRUECOLOR:
- /*
- * 12 or 16-bit True Colour. We encode the RGB value
- * according to the RGB bitfield information.
- */
- if (regno < 16) {
- u32 *pal = fbi->fb.pseudo_palette;
-
- val = chan_to_field(red, &fbi->fb.var.red);
- val |= chan_to_field(green, &fbi->fb.var.green);
- val |= chan_to_field(blue, &fbi->fb.var.blue);
-
- pal[regno] = val;
- ret = 0;
- }
- break;
-
- case FB_VISUAL_STATIC_PSEUDOCOLOR:
- case FB_VISUAL_PSEUDOCOLOR:
- ret = pxafb_setpalettereg(regno, red, green, blue, trans, info);
- break;
- }
-
- return ret;
-}
-
-/*
- * pxafb_bpp_to_lccr3():
- * Convert a bits per pixel value to the correct bit pattern for LCCR3
- */
-static int pxafb_bpp_to_lccr3(struct fb_var_screeninfo *var)
-{
- int ret = 0;
- switch (var->bits_per_pixel) {
- case 1: ret = LCCR3_1BPP; break;
- case 2: ret = LCCR3_2BPP; break;
- case 4: ret = LCCR3_4BPP; break;
- case 8: ret = LCCR3_8BPP; break;
- case 16: ret = LCCR3_16BPP; break;
- }
- return ret;
-}
-
-#ifdef CONFIG_CPU_FREQ
-/*
- * pxafb_display_dma_period()
- * Calculate the minimum period (in picoseconds) between two DMA
- * requests for the LCD controller. If we hit this, it means we're
- * doing nothing but LCD DMA.
- */
-static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
-{
- /*
- * Period = pixclock * bits_per_byte * bytes_per_transfer
- * / memory_bits_per_pixel;
- */
- return var->pixclock * 8 * 16 / var->bits_per_pixel;
-}
-
-extern unsigned int get_clk_frequency_khz(int info);
-#endif
-
-/*
- * pxafb_check_var():
- * Get the video params out of 'var'. If a value doesn't fit, round it up,
- * if it's too big, return -EINVAL.
- *
- * Round up in the following order: bits_per_pixel, xres,
- * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
- * bitfields, horizontal timing, vertical timing.
- */
-static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
-{
- struct pxafb_info *fbi = (struct pxafb_info *)info;
-
- if (var->xres < MIN_XRES)
- var->xres = MIN_XRES;
- if (var->yres < MIN_YRES)
- var->yres = MIN_YRES;
- if (var->xres > fbi->max_xres)
- var->xres = fbi->max_xres;
- if (var->yres > fbi->max_yres)
- var->yres = fbi->max_yres;
- var->xres_virtual =
- max(var->xres_virtual, var->xres);
- var->yres_virtual =
- max(var->yres_virtual, var->yres);
-
- /*
- * Setup the RGB parameters for this display.
- *
- * The pixel packing format is described on page 7-11 of the
- * PXA2XX Developer's Manual.
- */
- if ( var->bits_per_pixel == 16 ) {
- var->red.offset = 11; var->red.length = 5;
- var->green.offset = 5; var->green.length = 6;
- var->blue.offset = 0; var->blue.length = 5;
- var->transp.offset = var->transp.length = 0;
- } else {
- var->red.offset = var->green.offset = var->blue.offset = var->transp.offset = 0;
- var->red.length = 8;
- var->green.length = 8;
- var->blue.length = 8;
- var->transp.length = 0;
- }
-
-#ifdef CONFIG_CPU_FREQ
- DPRINTK("dma period = %d ps, clock = %d kHz\n",
- pxafb_display_dma_period(var),
- get_clk_frequency_khz(0));
-#endif
-
- return 0;
-}
-
-static inline void pxafb_set_truecolor(u_int is_true_color)
-{
- DPRINTK("true_color = %d\n", is_true_color);
- // do your machine-specific setup if needed
-}
-
-/*
- * pxafb_set_par():
- * Set the user defined part of the display for the specified console
- */
-static int pxafb_set_par(struct fb_info *info)
-{
- struct pxafb_info *fbi = (struct pxafb_info *)info;
- struct fb_var_screeninfo *var = &info->var;
- unsigned long palette_mem_size;
-
- DPRINTK("set_par\n");
-
- if (var->bits_per_pixel == 16)
- fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
- else if (!fbi->cmap_static)
- fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
- else {
- /*
- * Some people have weird ideas about wanting static
- * pseudocolor maps. I suspect their user space
- * applications are broken.
- */
- fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
- }
-
- fbi->fb.fix.line_length = var->xres_virtual *
- var->bits_per_pixel / 8;
- fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
-
- palette_mem_size = fbi->palette_size * sizeof(u16);
-
- DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
-
- fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
- fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
-
- /*
- * Set (any) board control register to handle new color depth
- */
- pxafb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR);
-
- pxafb_activate_var(var, fbi);
-
- return 0;
-}
-
-/*
- * Formal definition of the VESA spec:
- * On
- * This refers to the state of the display when it is in full operation
- * Stand-By
- * This defines an optional operating state of minimal power reduction with
- * the shortest recovery time
- * Suspend
- * This refers to a level of power management in which substantial power
- * reduction is achieved by the display. The display can have a longer
- * recovery time from this state than from the Stand-by state
- * Off
- * This indicates that the display is consuming the lowest level of power
- * and is non-operational. Recovery from this state may optionally require
- * the user to manually power on the monitor
- *
- * Now, the fbdev driver adds an additional state, (blank), where they
- * turn off the video (maybe by colormap tricks), but don't mess with the
- * video itself: think of it semantically between on and Stand-By.
- *
- * So here's what we should do in our fbdev blank routine:
- *
- * VESA_NO_BLANKING (mode 0) Video on, front/back light on
- * VESA_VSYNC_SUSPEND (mode 1) Video on, front/back light off
- * VESA_HSYNC_SUSPEND (mode 2) Video on, front/back light off
- * VESA_POWERDOWN (mode 3) Video off, front/back light off
- *
- * This will match the matrox implementation.
- */
-
-/*
- * pxafb_blank():
- * Blank the display by setting all palette values to zero. Note, the
- * 12 and 16 bpp modes don't really use the palette, so this will not
- * blank the display in all modes.
- */
-static int pxafb_blank(int blank, struct fb_info *info)
-{
- struct pxafb_info *fbi = (struct pxafb_info *)info;
- int i;
-
- DPRINTK("pxafb_blank: blank=%d\n", blank);
-
- switch (blank) {
- case VESA_POWERDOWN:
- case VESA_VSYNC_SUSPEND:
- case VESA_HSYNC_SUSPEND:
- if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
- fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
- for (i = 0; i < fbi->palette_size; i++)
- pxafb_setpalettereg(i, 0, 0, 0, 0, info);
-
- pxafb_schedule_work(fbi, C_DISABLE);
- //TODO if (pxafb_blank_helper) pxafb_blank_helper(blank);
- break;
-
- case VESA_NO_BLANKING:
- //TODO if (pxafb_blank_helper) pxafb_blank_helper(blank);
- if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
- fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
- fb_set_cmap(&fbi->fb.cmap, 1, info);
- pxafb_schedule_work(fbi, C_ENABLE);
- }
- return 0;
-}
-
-static struct fb_ops pxafb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = pxafb_check_var,
- .fb_set_par = pxafb_set_par,
- .fb_setcolreg = pxafb_setcolreg,
- .fb_fillrect = cfb_fillrect,
- .fb_copyarea = cfb_copyarea,
- .fb_imageblit = cfb_imageblit,
- .fb_blank = pxafb_blank,
- .fb_cursor = soft_cursor,
-};
-
-/*
- * Calculate the PCD value from the clock rate (in picoseconds).
- * We take account of the PPCR clock setting.
- * From PXA Developer's Manual:
- *
- * PixelClock = LCLK
- * -------------
- * 2 ( PCD + 1 )
- *
- * PCD = LCLK
- * ------------- - 1
- * 2(PixelClock)
- *
- * Where:
- * LCLK = LCD/Memory Clock
- * PCD = LCCR3[7:0]
- *
- * PixelClock here is in Hz while the pixclock argument given is the
- * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 )
- *
- * The function get_lclk_frequency_10khz returns LCLK in units of
- * 10khz. Calling the result of this function lclk gives us the
- * following
- *
- * PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 )
- * -------------------------------------- - 1
- * 2
- *
- * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below.
- */
-static inline unsigned int get_pcd(unsigned int pixclock)
-{
- unsigned long long pcd;
-
- /* FIXME: Need to take into account Double Pixel Clock mode
- * (DPC) bit? or perhaps set it based on the various clock
- * speeds */
-
- pcd = (unsigned long long)get_lclk_frequency_10khz() * (unsigned long long)pixclock;
- pcd /= 100000000 * 2;
- /* no need for this, since we should subtract 1 anyway. they cancel */
- /* pcd += 1; */ /* make up for integer math truncations */
- return (unsigned int)pcd;
-}
-
-/*
- * pxafb_activate_var():
- * Configures LCD Controller based on entries in var parameter. Settings are
- * only written to the controller if changes were made.
- */
-static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *fbi)
-{
- struct pxafb_lcd_reg new_regs;
- u_long flags;
- u_int lines_per_panel, pcd = get_pcd(var->pixclock);
-
- DPRINTK("Configuring PXA LCD\n");
-
- DPRINTK("var: xres=%d hslen=%d lm=%d rm=%d\n",
- var->xres, var->hsync_len,
- var->left_margin, var->right_margin);
- DPRINTK("var: yres=%d vslen=%d um=%d bm=%d\n",
- var->yres, var->vsync_len,
- var->upper_margin, var->lower_margin);
- DPRINTK("var: pixclock=%d pcd=%d\n", var->pixclock, pcd);
-
-#if DEBUG_VAR
- if (var->xres < 16 || var->xres > 1024)
- printk(KERN_ERR "%s: invalid xres %d\n",
- fbi->fb.fix.id, var->xres);
- switch(var->bits_per_pixel) {
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- break;
- default:
- printk(KERN_ERR "%s: invalid bit depth %d\n",
- fbi->fb.fix.id, var->bits_per_pixel);
- break;
- }
- if (var->hsync_len < 1 || var->hsync_len > 64)
- printk(KERN_ERR "%s: invalid hsync_len %d\n",
- fbi->fb.fix.id, var->hsync_len);
- if (var->left_margin < 1 || var->left_margin > 255)
- printk(KERN_ERR "%s: invalid left_margin %d\n",
- fbi->fb.fix.id, var->left_margin);
- if (var->right_margin < 1 || var->right_margin > 255)
- printk(KERN_ERR "%s: invalid right_margin %d\n",
- fbi->fb.fix.id, var->right_margin);
- if (var->yres < 1 || var->yres > 1024)
- printk(KERN_ERR "%s: invalid yres %d\n",
- fbi->fb.fix.id, var->yres);
- if (var->vsync_len < 1 || var->vsync_len > 64)
- printk(KERN_ERR "%s: invalid vsync_len %d\n",
- fbi->fb.fix.id, var->vsync_len);
- if (var->upper_margin < 0 || var->upper_margin > 255)
- printk(KERN_ERR "%s: invalid upper_margin %d\n",
- fbi->fb.fix.id, var->upper_margin);
- if (var->lower_margin < 0 || var->lower_margin > 255)
- printk(KERN_ERR "%s: invalid lower_margin %d\n",
- fbi->fb.fix.id, var->lower_margin);
-#endif
-
- new_regs.lccr0 = fbi->lccr0 |
- (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
- LCCR0_QDM | LCCR0_BM | LCCR0_OUM);
-
- new_regs.lccr1 =
- LCCR1_DisWdth(var->xres) +
- LCCR1_HorSnchWdth(var->hsync_len) +
- LCCR1_BegLnDel(var->left_margin) +
- LCCR1_EndLnDel(var->right_margin);
-
- /*
- * If we have a dual scan LCD, we need to halve
- * the YRES parameter.
- */
- lines_per_panel = var->yres;
- if (fbi->lccr0 & LCCR0_SDS)
- lines_per_panel /= 2;
-
- new_regs.lccr2 =
- LCCR2_DisHght(lines_per_panel) +
- LCCR2_VrtSnchWdth(var->vsync_len) +
- LCCR2_BegFrmDel(var->upper_margin) +
- LCCR2_EndFrmDel(var->lower_margin);
-
- new_regs.lccr3 = fbi->lccr3 |
- pxafb_bpp_to_lccr3(var) |
- (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) |
- (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL);
-
- if (pcd)
- new_regs.lccr3 |= LCCR3_PixClkDiv(pcd);
-
- DPRINTK("nlccr0 = 0x%08x\n", new_regs.lccr0);
- DPRINTK("nlccr1 = 0x%08x\n", new_regs.lccr1);
- DPRINTK("nlccr2 = 0x%08x\n", new_regs.lccr2);
- DPRINTK("nlccr3 = 0x%08x\n", new_regs.lccr3);
-
- /* Update shadow copy atomically */
- local_irq_save(flags);
-
- /* setup dma descriptors */
- fbi->dmadesc_fblow_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 3*16);
- fbi->dmadesc_fbhigh_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 2*16);
- fbi->dmadesc_palette_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 1*16);
-
- fbi->dmadesc_fblow_dma = fbi->palette_dma - 3*16;
- fbi->dmadesc_fbhigh_dma = fbi->palette_dma - 2*16;
- fbi->dmadesc_palette_dma = fbi->palette_dma - 1*16;
-
-#define BYTES_PER_PANEL (lines_per_panel * fbi->fb.fix.line_length)
-
- /* populate descriptors */
- fbi->dmadesc_fblow_cpu->fdadr = fbi->dmadesc_fblow_dma;
- fbi->dmadesc_fblow_cpu->fsadr = fbi->screen_dma + BYTES_PER_PANEL;
- fbi->dmadesc_fblow_cpu->fidr = 0;
- fbi->dmadesc_fblow_cpu->ldcmd = BYTES_PER_PANEL;
-
- fbi->fdadr1 = fbi->dmadesc_fblow_dma; /* only used in dual-panel mode */
-
- fbi->dmadesc_fbhigh_cpu->fsadr = fbi->screen_dma;
- fbi->dmadesc_fbhigh_cpu->fidr = 0;
- fbi->dmadesc_fbhigh_cpu->ldcmd = BYTES_PER_PANEL;
-
- fbi->dmadesc_palette_cpu->fsadr = fbi->palette_dma;
- fbi->dmadesc_palette_cpu->fidr = 0;
- fbi->dmadesc_palette_cpu->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
-
- if( var->bits_per_pixel < 12)
- {
- /* assume any mode with <12 bpp is palette driven */
- fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
- fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_palette_dma;
- fbi->fdadr0 = fbi->dmadesc_palette_dma; /* flips back and forth between pal and fbhigh */
- }
- else
- {
- /* palette shouldn't be loaded in true-color mode */
- fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_fbhigh_dma;
- fbi->fdadr0 = fbi->dmadesc_fbhigh_dma; /* no pal just fbhigh */
- /* init it to something, even though we won't be using it */
- fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_palette_dma;
- }
-
-#if 0
- DPRINTK("fbi->dmadesc_fblow_cpu = 0x%p\n", fbi->dmadesc_fblow_cpu);
- DPRINTK("fbi->dmadesc_fbhigh_cpu = 0x%p\n", fbi->dmadesc_fbhigh_cpu);
- DPRINTK("fbi->dmadesc_palette_cpu = 0x%p\n", fbi->dmadesc_palette_cpu);
- DPRINTK("fbi->dmadesc_fblow_dma = 0x%x\n", fbi->dmadesc_fblow_dma);
- DPRINTK("fbi->dmadesc_fbhigh_dma = 0x%x\n", fbi->dmadesc_fbhigh_dma);
- DPRINTK("fbi->dmadesc_palette_dma = 0x%x\n", fbi->dmadesc_palette_dma);
-
- DPRINTK("fbi->dmadesc_fblow_cpu->fdadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fdadr);
- DPRINTK("fbi->dmadesc_fbhigh_cpu->fdadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fdadr);
- DPRINTK("fbi->dmadesc_palette_cpu->fdadr = 0x%x\n", fbi->dmadesc_palette_cpu->fdadr);
-
- DPRINTK("fbi->dmadesc_fblow_cpu->fsadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fsadr);
- DPRINTK("fbi->dmadesc_fbhigh_cpu->fsadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fsadr);
- DPRINTK("fbi->dmadesc_palette_cpu->fsadr = 0x%x\n", fbi->dmadesc_palette_cpu->fsadr);
-
- DPRINTK("fbi->dmadesc_fblow_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fblow_cpu->ldcmd);
- DPRINTK("fbi->dmadesc_fbhigh_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fbhigh_cpu->ldcmd);
- DPRINTK("fbi->dmadesc_palette_cpu->ldcmd = 0x%x\n", fbi->dmadesc_palette_cpu->ldcmd);
-#endif
-
- fbi->reg_lccr0 = new_regs.lccr0;
- fbi->reg_lccr1 = new_regs.lccr1;
- fbi->reg_lccr2 = new_regs.lccr2;
- fbi->reg_lccr3 = new_regs.lccr3;
- local_irq_restore(flags);
-
- /*
- * Only update the registers if the controller is enabled
- * and something has changed.
- */
- if ((LCCR0 != fbi->reg_lccr0) || (LCCR1 != fbi->reg_lccr1) ||
- (LCCR2 != fbi->reg_lccr2) || (LCCR3 != fbi->reg_lccr3) ||
- (FDADR0 != fbi->fdadr0) || (FDADR1 != fbi->fdadr1))
- pxafb_schedule_work(fbi, C_REENABLE);
-
- return 0;
-}
-
-/*
- * NOTE! The following functions are purely helpers for set_ctrlr_state.
- * Do not call them directly; set_ctrlr_state does the correct serialisation
- * to ensure that things happen in the right way 100% of time time.
- * -- rmk
- */
-static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on)
-{
- DPRINTK("backlight o%s\n", on ? "n" : "ff");
-
- if (pxafb_backlight_power)
- pxafb_backlight_power(on);
-}
-
-static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on)
-{
- DPRINTK("LCD power o%s\n", on ? "n" : "ff");
-
- if (pxafb_lcd_power)
- pxafb_lcd_power(on);
-}
-
-static void pxafb_setup_gpio(struct pxafb_info *fbi)
-{
- unsigned int lccr0 = fbi->lccr0;
-
- /*
- * setup is based on type of panel supported
- */
-
- /* 4 bit interface */
- if ((lccr0 & LCCR0_CMS) == LCCR0_Mono &&
- (lccr0 & LCCR0_SDS) == LCCR0_Sngl &&
- (lccr0 & LCCR0_DPD) == LCCR0_4PixMono)
- {
- // bits 58-61
- GPDR1 |= (0xf << 26);
- GAFR1_U = (GAFR1_U & ~(0xff << 20)) | (0xaa << 20);
-
- // bits 74-77
- GPDR2 |= (0xf << 10);
- GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
- }
-
- /* 8 bit interface */
- else if (((lccr0 & LCCR0_CMS) == LCCR0_Mono &&
- ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_DPD) == LCCR0_8PixMono)) ||
- ((lccr0 & LCCR0_CMS) == LCCR0_Color &&
- (lccr0 & LCCR0_PAS) == LCCR0_Pas && (lccr0 & LCCR0_SDS) == LCCR0_Sngl))
- {
- // bits 58-65
- GPDR1 |= (0x3f << 26);
- GPDR2 |= (0x3);
-
- GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
- GAFR2_L = (GAFR2_L & ~0xf) | (0xa);
-
- // bits 74-77
- GPDR2 |= (0xf << 10);
- GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
- }
-
- /* 16 bit interface */
- else if ((lccr0 & LCCR0_CMS) == LCCR0_Color &&
- ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_PAS) == LCCR0_Act))
- {
- // bits 58-77
- GPDR1 |= (0x3f << 26);
- GPDR2 |= 0x00003fff;
-
- GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
- GAFR2_L = (GAFR2_L & 0xf0000000) | 0x0aaaaaaa;
- }
-
- else {
- printk( KERN_ERR "pxafb_setup_gpio: unable to determine bits per pixel\n");
- }
-}
-
-static void pxafb_enable_controller(struct pxafb_info *fbi)
-{
- DPRINTK("Enabling LCD controller\n");
- DPRINTK("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr0);
- DPRINTK("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr1);
- DPRINTK("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
- DPRINTK("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
- DPRINTK("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
- DPRINTK("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
-
- /* Sequence from 11.7.10 */
- LCCR3 = fbi->reg_lccr3;
- LCCR2 = fbi->reg_lccr2;
- LCCR1 = fbi->reg_lccr1;
- LCCR0 = fbi->reg_lccr0 & ~LCCR0_ENB;
-
- FDADR0 = fbi->fdadr0;
- FDADR1 = fbi->fdadr1;
- LCCR0 |= LCCR0_ENB;
-
- DPRINTK("FDADR0 0x%08x\n", (unsigned int) FDADR0);
- DPRINTK("FDADR1 0x%08x\n", (unsigned int) FDADR1);
- DPRINTK("LCCR0 0x%08x\n", (unsigned int) LCCR0);
- DPRINTK("LCCR1 0x%08x\n", (unsigned int) LCCR1);
- DPRINTK("LCCR2 0x%08x\n", (unsigned int) LCCR2);
- DPRINTK("LCCR3 0x%08x\n", (unsigned int) LCCR3);
-}
-
-static void pxafb_disable_controller(struct pxafb_info *fbi)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- DPRINTK("Disabling LCD controller\n");
-
- add_wait_queue(&fbi->ctrlr_wait, &wait);
- set_current_state(TASK_UNINTERRUPTIBLE);
-
- LCSR = 0xffffffff; /* Clear LCD Status Register */
- LCCR0 &= ~LCCR0_LDM; /* Enable LCD Disable Done Interrupt */
- LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */
-
- schedule_timeout(20 * HZ / 1000);
- remove_wait_queue(&fbi->ctrlr_wait, &wait);
-}
-
-/*
- * pxafb_handle_irq: Handle 'LCD DONE' interrupts.
- */
-static irqreturn_t pxafb_handle_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct pxafb_info *fbi = dev_id;
- unsigned int lcsr = LCSR;
-
- if (lcsr & LCSR_LDD) {
- LCCR0 |= LCCR0_LDM;
- wake_up(&fbi->ctrlr_wait);
- }
-
- LCSR = lcsr;
- return IRQ_HANDLED;
-}
-
-/*
- * This function must be called from task context only, since it will
- * sleep when disabling the LCD controller, or if we get two contending
- * processes trying to alter state.
- */
-static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
-{
- u_int old_state;
-
- down(&fbi->ctrlr_sem);
-
- old_state = fbi->state;
-
- /*
- * Hack around fbcon initialisation.
- */
- if (old_state == C_STARTUP && state == C_REENABLE)
- state = C_ENABLE;
-
- switch (state) {
- case C_DISABLE_CLKCHANGE:
- /*
- * Disable controller for clock change. If the
- * controller is already disabled, then do nothing.
- */
- if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
- fbi->state = state;
- //TODO __pxafb_lcd_power(fbi, 0);
- pxafb_disable_controller(fbi);
- }
- break;
-
- case C_DISABLE_PM:
- case C_DISABLE:
- /*
- * Disable controller
- */
- if (old_state != C_DISABLE) {
- fbi->state = state;
- __pxafb_backlight_power(fbi, 0);
- __pxafb_lcd_power(fbi, 0);
- if (old_state != C_DISABLE_CLKCHANGE)
- pxafb_disable_controller(fbi);
- }
- break;
-
- case C_ENABLE_CLKCHANGE:
- /*
- * Enable the controller after clock change. Only
- * do this if we were disabled for the clock change.
- */
- if (old_state == C_DISABLE_CLKCHANGE) {
- fbi->state = C_ENABLE;
- pxafb_enable_controller(fbi);
- //TODO __pxafb_lcd_power(fbi, 1);
- }
- break;
-
- case C_REENABLE:
- /*
- * Re-enable the controller only if it was already
- * enabled. This is so we reprogram the control
- * registers.
- */
- if (old_state == C_ENABLE) {
- pxafb_disable_controller(fbi);
- pxafb_setup_gpio(fbi);
- pxafb_enable_controller(fbi);
- }
- break;
-
- case C_ENABLE_PM:
- /*
- * Re-enable the controller after PM. This is not
- * perfect - think about the case where we were doing
- * a clock change, and we suspended half-way through.
- */
- if (old_state != C_DISABLE_PM)
- break;
- /* fall through */
-
- case C_ENABLE:
- /*
- * Power up the LCD screen, enable controller, and
- * turn on the backlight.
- */
- if (old_state != C_ENABLE) {
- fbi->state = C_ENABLE;
- pxafb_setup_gpio(fbi);
- pxafb_enable_controller(fbi);
- __pxafb_lcd_power(fbi, 1);
- __pxafb_backlight_power(fbi, 1);
- }
- break;
- }
- up(&fbi->ctrlr_sem);
-}
-
-/*
- * Our LCD controller task (which is called when we blank or unblank)
- * via keventd.
- */
-static void pxafb_task(void *dummy)
-{
- struct pxafb_info *fbi = dummy;
- u_int state = xchg(&fbi->task_state, -1);
-
- set_ctrlr_state(fbi, state);
-}
-
-#ifdef CONFIG_CPU_FREQ
-/*
- * CPU clock speed change handler. We need to adjust the LCD timing
- * parameters when the CPU clock is adjusted by the power management
- * subsystem.
- *
- * TODO: Determine why f->new != 10*get_lclk_frequency_10khz()
- */
-static int
-pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
-{
- struct pxafb_info *fbi = TO_INF(nb, freq_transition);
- //TODO struct cpufreq_freqs *f = data;
- u_int pcd;
-
- switch (val) {
- case CPUFREQ_PRECHANGE:
- set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
- break;
-
- case CPUFREQ_POSTCHANGE:
- pcd = get_pcd(fbi->fb.var.pixclock);
- fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd);
- set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
- break;
- }
- return 0;
-}
-
-static int
-pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
-{
- struct pxafb_info *fbi = TO_INF(nb, freq_policy);
- struct fb_var_screeninfo *var = &fbi->fb.var;
- struct cpufreq_policy *policy = data;
-
- switch (val) {
- case CPUFREQ_ADJUST:
- case CPUFREQ_INCOMPATIBLE:
- printk(KERN_DEBUG "min dma period: %d ps, "
- "new clock %d kHz\n", pxafb_display_dma_period(var),
- policy->max);
- // TODO: fill in min/max values
- break;
-#if 0
- case CPUFREQ_NOTIFY:
- printk(KERN_ERR "%s: got CPUFREQ_NOTIFY\n", __FUNCTION__);
- do {} while(0);
- /* todo: panic if min/max values aren't fulfilled
- * [can't really happen unless there's a bug in the
- * CPU policy verification process *
- */
- break;
-#endif
- }
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-/*
- * Power management hooks. Note that we won't be called from IRQ context,
- * unlike the blank functions above, so we may sleep.
- */
-static int pxafb_suspend(struct device *dev, u32 state, u32 level)
-{
- struct pxafb_info *fbi = dev_get_drvdata(dev);
-
- if (level == SUSPEND_DISABLE || level == SUSPEND_POWER_DOWN)
- set_ctrlr_state(fbi, C_DISABLE_PM);
- return 0;
-}
-
-static int pxafb_resume(struct device *dev, u32 level)
-{
- struct pxafb_info *fbi = dev_get_drvdata(dev);
-
- if (level == RESUME_ENABLE)
- set_ctrlr_state(fbi, C_ENABLE_PM);
- return 0;
-}
-#else
-#define pxafb_suspend NULL
-#define pxafb_resume NULL
-#endif
-
-/*
- * pxafb_map_video_memory():
- * Allocates the DRAM memory for the frame buffer. This buffer is
- * remapped into a non-cached, non-buffered, memory region to
- * allow palette and pixel writes to occur without flushing the
- * cache. Once this area is remapped, all virtual memory
- * access to the video memory should occur at the new region.
- */
-static int __init pxafb_map_video_memory(struct pxafb_info *fbi)
-{
- u_long palette_mem_size;
-
- /*
- * We reserve one page for the palette, plus the size
- * of the framebuffer.
- */
- fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
- fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
- &fbi->map_dma, GFP_KERNEL);
-
- if (fbi->map_cpu) {
- /* prevent initial garbage on screen */
- memset(fbi->map_cpu, 0, fbi->map_size);
- fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
- fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
- /*
- * FIXME: this is actually the wrong thing to place in
- * smem_start. But fbdev suffers from the problem that
- * it needs an API which doesn't exist (in this case,
- * dma_writecombine_mmap)
- */
- fbi->fb.fix.smem_start = fbi->screen_dma;
-
- fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16;
-
- palette_mem_size = fbi->palette_size * sizeof(u16);
- DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
-
- fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
- fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;
- }
-
- return fbi->map_cpu ? 0 : -ENOMEM;
-}
-
-static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev)
-{
- struct pxafb_info *fbi;
- void *addr;
- struct pxafb_mach_info *inf = dev->platform_data;
-
- /* Alloc the pxafb_info and pseudo_palette in one step */
- fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 17, GFP_KERNEL);
- if (!fbi)
- return NULL;
-
- memset(fbi, 0, sizeof(struct pxafb_info));
- fbi->dev = dev;
-
- strcpy(fbi->fb.fix.id, PXA_NAME);
-
- fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
- fbi->fb.fix.type_aux = 0;
- fbi->fb.fix.xpanstep = 0;
- fbi->fb.fix.ypanstep = 0;
- fbi->fb.fix.ywrapstep = 0;
- fbi->fb.fix.accel = FB_ACCEL_NONE;
-
- fbi->fb.var.nonstd = 0;
- fbi->fb.var.activate = FB_ACTIVATE_NOW;
- fbi->fb.var.height = -1;
- fbi->fb.var.width = -1;
- fbi->fb.var.accel_flags = 0;
- fbi->fb.var.vmode = FB_VMODE_NONINTERLACED;
-
- fbi->fb.fbops = &pxafb_ops;
- fbi->fb.flags = FBINFO_FLAG_DEFAULT;
- fbi->fb.node = -1;
- fbi->fb.currcon = -1;
-
- addr = fbi;
- addr = addr + sizeof(struct pxafb_info);
- fbi->fb.pseudo_palette = addr;
-
- fbi->max_xres = inf->xres;
- fbi->fb.var.xres = inf->xres;
- fbi->fb.var.xres_virtual = inf->xres;
- fbi->max_yres = inf->yres;
- fbi->fb.var.yres = inf->yres;
- fbi->fb.var.yres_virtual = inf->yres;
- fbi->max_bpp = inf->bpp;
- fbi->fb.var.bits_per_pixel = inf->bpp;
- fbi->fb.var.pixclock = inf->pixclock;
- fbi->fb.var.hsync_len = inf->hsync_len;
- fbi->fb.var.left_margin = inf->left_margin;
- fbi->fb.var.right_margin = inf->right_margin;
- fbi->fb.var.vsync_len = inf->vsync_len;
- fbi->fb.var.upper_margin = inf->upper_margin;
- fbi->fb.var.lower_margin = inf->lower_margin;
- fbi->fb.var.sync = inf->sync;
- fbi->fb.var.grayscale = inf->cmap_greyscale;
- fbi->cmap_inverse = inf->cmap_inverse;
- fbi->cmap_static = inf->cmap_static;
- fbi->lccr0 = inf->lccr0;
- fbi->lccr3 = inf->lccr3;
- fbi->state = C_STARTUP;
- fbi->task_state = (u_char)-1;
- fbi->fb.fix.smem_len = fbi->max_xres * fbi->max_yres *
- fbi->max_bpp / 8;
-
- init_waitqueue_head(&fbi->ctrlr_wait);
- INIT_WORK(&fbi->task, pxafb_task, fbi);
- init_MUTEX(&fbi->ctrlr_sem);
-
- return fbi;
-}
-
-#ifdef CONFIG_FB_PXA_PARAMETERS
-static int __init pxafb_parse_options(struct device *dev, char *options)
-{
- struct pxafb_mach_info *inf = dev->platform_data;
- char *this_opt;
-
- if (!options || !*options)
- return 0;
-
- dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
-
- /* could be made table driven or similar?... */
- while ((this_opt = strsep(&options, ",")) != NULL) {
- if (!strncmp(this_opt, "mode:", 5)) {
- const char *name = this_opt+5;
- unsigned int namelen = strlen(name);
- int res_specified = 0, bpp_specified = 0;
- unsigned int xres = 0, yres = 0, bpp = 0;
- int yres_specified = 0;
- int i;
- for (i = namelen-1; i >= 0; i--) {
- switch (name[i]) {
- case '-':
- namelen = i;
- if (!bpp_specified && !yres_specified) {
- bpp = simple_strtoul(&name[i+1], NULL, 0);
- bpp_specified = 1;
- } else
- goto done;
- break;
- case 'x':
- if (!yres_specified) {
- yres = simple_strtoul(&name[i+1], NULL, 0);
- yres_specified = 1;
- } else
- goto done;
- break;
- case '0'...'9':
- break;
- default:
- goto done;
- }
- }
- if (i < 0 && yres_specified) {
- xres = simple_strtoul(name, NULL, 0);
- res_specified = 1;
- }
- done:
- if ( res_specified ) {
- dev_info(dev, "overriding resolution: %dx%x\n", xres, yres);
- inf->xres = xres; inf->yres = yres;
- }
- if ( bpp_specified )
- switch (bpp) {
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- inf->bpp = bpp;
- dev_info(dev, "overriding bit depth: %d\n", bpp);
- break;
- default:
- dev_err(dev, "Depth %d is not valid\n", bpp);
- }
- } else if (!strncmp(this_opt, "pixclock:", 9)) {
- inf->pixclock = simple_strtoul(this_opt+9, NULL, 0);
- dev_info(dev, "override pixclock: %u\n", inf->pixclock);
- } else if (!strncmp(this_opt, "left:", 5)) {
- inf->left_margin = simple_strtoul(this_opt+5, NULL, 0);
- dev_info(dev, "override left: %u\n", inf->left_margin);
- } else if (!strncmp(this_opt, "right:", 6)) {
- inf->right_margin = simple_strtoul(this_opt+6, NULL, 0);
- dev_info(dev, "override right: %u\n", inf->right_margin);
- } else if (!strncmp(this_opt, "upper:", 6)) {
- inf->upper_margin = simple_strtoul(this_opt+6, NULL, 0);
- dev_info(dev, "override upper: %u\n", inf->upper_margin);
- } else if (!strncmp(this_opt, "lower:", 6)) {
- inf->lower_margin = simple_strtoul(this_opt+6, NULL, 0);
- dev_info(dev, "override lower: %u\n", inf->lower_margin);
- } else if (!strncmp(this_opt, "hsynclen:", 9)) {
- inf->hsync_len = simple_strtoul(this_opt+9, NULL, 0);
- dev_info(dev, "override hsynclen: %u\n", inf->hsync_len);
- } else if (!strncmp(this_opt, "vsynclen:", 9)) {
- inf->vsync_len = simple_strtoul(this_opt+9, NULL, 0);
- dev_info(dev, "override vsynclen: %u\n", inf->vsync_len);
- } else if (!strncmp(this_opt, "hsync:", 6)) {
- if ( simple_strtoul(this_opt+6, NULL, 0) == 0 ) {
- dev_info(dev, "override hsync: Active Low\n");
- inf->sync &= ~FB_SYNC_HOR_HIGH_ACT;
- } else {
- dev_info(dev, "override hsync: Active High\n");
- inf->sync |= FB_SYNC_HOR_HIGH_ACT;
- }
- } else if (!strncmp(this_opt, "vsync:", 6)) {
- if ( simple_strtoul(this_opt+6, NULL, 0) == 0 ) {
- dev_info(dev, "override vsync: Active Low\n");
- inf->sync &= ~FB_SYNC_VERT_HIGH_ACT;
- } else {
- dev_info(dev, "override vsync: Active High\n");
- inf->sync |= FB_SYNC_VERT_HIGH_ACT;
- }
- } else if (!strncmp(this_opt, "dpc:", 4)) {
- if ( simple_strtoul(this_opt+4, NULL, 0) == 0 ) {
- dev_info(dev, "override double pixel clock: false\n");
- inf->lccr3 &= ~LCCR3_DPC;
- } else {
- dev_info(dev, "override double pixel clock: true\n");
- inf->lccr3 |= LCCR3_DPC;
- }
- } else if (!strncmp(this_opt, "outputen:", 9)) {
- if ( simple_strtoul(this_opt+9, NULL, 0) == 0 ) {
- dev_info(dev, "override output enable: active low\n");
- inf->lccr3 = ( inf->lccr3 & ~LCCR3_OEP ) | LCCR3_OutEnL;
- } else {
- dev_info(dev, "override output enable: active high\n");
- inf->lccr3 = ( inf->lccr3 & ~LCCR3_OEP ) | LCCR3_OutEnH;
- }
- } else if (!strncmp(this_opt, "pixclockpol:", 12)) {
- if ( simple_strtoul(this_opt+12, NULL, 0) == 0 ) {
- dev_info(dev, "override pixel clock polarity: falling edge\n");
- inf->lccr3 = ( inf->lccr3 & ~LCCR3_PCP ) | LCCR3_PixFlEdg;
- } else {
- dev_info(dev, "override pixel clock polarity: rising edge\n");
- inf->lccr3 = ( inf->lccr3 & ~LCCR3_PCP ) | LCCR3_PixRsEdg;
- }
- } else if (!strncmp(this_opt, "color", 5)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color;
- } else if (!strncmp(this_opt, "mono", 4)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono;
- } else if (!strncmp(this_opt, "active", 6)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act;
- } else if (!strncmp(this_opt, "passive", 7)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas;
- } else if (!strncmp(this_opt, "single", 6)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl;
- } else if (!strncmp(this_opt, "dual", 4)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual;
- } else if (!strncmp(this_opt, "4pix", 4)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
- } else if (!strncmp(this_opt, "8pix", 4)) {
- inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
- } else {
- dev_err(dev, "unknown option: %s\n", this_opt);
- return -EINVAL;
- }
- }
- return 0;
-
-}
-#endif
-
-int __init pxafb_probe(struct device *dev)
-{
- struct pxafb_info *fbi;
- struct pxafb_mach_info *inf;
- unsigned long flags;
- int ret;
-
- dev_dbg(dev, "pxafb_probe\n");
-
- inf = dev->platform_data;
- ret = -ENOMEM;
- fbi = NULL;
- if (!inf)
- goto failed;
-
-#ifdef CONFIG_FB_PXA_PARAMETERS
- ret = pxafb_parse_options(dev, g_options);
- if ( ret < 0 )
- goto failed;
-#endif
-
-#ifdef DEBUG_VAR
- /* Check for various illegal bit-combinations. Currently only
- * a warning is given. */
-
- if ( inf->lccr0 & LCCR0_INVALID_CONFIG_MASK )
- dev_warn(dev, "machine LCCR0 setting contains illegal bits: %08x\n",
- inf->lccr0 & LCCR0_INVALID_CONFIG_MASK);
- if ( inf->lccr3 & LCCR3_INVALID_CONFIG_MASK )
- dev_warn(dev, "machine LCCR3 setting contains illegal bits: %08x\n",
- inf->lccr3 & LCCR3_INVALID_CONFIG_MASK);
- if ( inf->lccr0 & LCCR0_DPD &&
- ( ( inf->lccr0 & LCCR0_PAS ) != LCCR0_Pas ||
- ( inf->lccr0 & LCCR0_SDS ) != LCCR0_Sngl ||
- ( inf->lccr0 & LCCR0_CMS ) != LCCR0_Mono ) )
- dev_warn(dev, "Double Pixel Data (DPD) mode is only valid in passive mono"
- " single panel mode\n");
- if ( (inf->lccr0 & LCCR0_PAS) == LCCR0_Act &&
- ( inf->lccr0 & LCCR0_SDS ) == LCCR0_Dual )
- dev_warn(dev, "Dual panel only valid in passive mode\n");
- if ( (inf->lccr0 & LCCR0_PAS ) == LCCR0_Pas &&
- (inf->upper_margin || inf->lower_margin) )
- dev_warn(dev, "Upper and lower margins must be 0 in passive mode\n");
-#endif
-
- dev_dbg(dev, "got a %dx%dx%d LCD\n",inf->xres, inf->yres, inf->bpp);
- if (inf->xres == 0 || inf->yres == 0 || inf->bpp == 0) {
- dev_err(dev, "Invalid resolution or bit depth\n");
- ret = -EINVAL;
- goto failed;
- }
- pxafb_backlight_power = inf->pxafb_backlight_power;
- pxafb_lcd_power = inf->pxafb_lcd_power;
- fbi = pxafb_init_fbinfo(dev);
- if (!fbi) {
- dev_err(dev, "Failed to initialize framebuffer device\n");
- ret = -ENOMEM; // only reason for pxafb_init_fbinfo to fail is kmalloc
- goto failed;
- }
-
- /* Initialize video memory */
- ret = pxafb_map_video_memory(fbi);
- if (ret) {
- dev_err(dev, "Failed to allocate video RAM: %d\n", ret);
- ret = -ENOMEM;
- goto failed;
- }
- /* enable LCD controller clock */
- local_irq_save(flags);
- CKEN |= CKEN16_LCD;
- local_irq_restore(flags);
-
- ret = request_irq(IRQ_LCD, pxafb_handle_irq, SA_INTERRUPT, "LCD", fbi);
- if (ret) {
- dev_err(dev, "request_irq failed: %d\n", ret);
- ret = -EBUSY;
- goto failed;
- }
-
- /*
- * This makes sure that our colour bitfield
- * descriptors are correctly initialised.
- */
- pxafb_check_var(&fbi->fb.var, &fbi->fb);
- pxafb_set_par(&fbi->fb);
-
- dev_set_drvdata(dev, fbi);
-
- ret = register_framebuffer(&fbi->fb);
- if (ret < 0) {
- dev_err(dev, "Failed to register framebuffer device: %d\n", ret);
- goto failed;
- }
-
-#ifdef CONFIG_PM
- // TODO
-#endif
-
-#ifdef CONFIG_CPU_FREQ
- fbi->freq_transition.notifier_call = pxafb_freq_transition;
- fbi->freq_policy.notifier_call = pxafb_freq_policy;
- cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER);
- cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER);
-#endif
-
- /*
- * Ok, now enable the LCD controller
- */
- set_ctrlr_state(fbi, C_ENABLE);
-
- return 0;
-
-failed:
- dev_set_drvdata(dev, NULL);
- if (fbi)
- kfree(fbi);
- return ret;
-}
-
-static struct device_driver pxafb_driver = {
- .name = "pxafb",
- .bus = &platform_bus_type,
- .probe = pxafb_probe,
-#ifdef CONFIG_PM
- .suspend = pxafb_suspend,
- .resume = pxafb_resume,
-#endif
-};
-
-int __devinit pxafb_init(void)
-{
- return driver_register(&pxafb_driver);
-}
-
-#ifndef MODULE
-int __devinit pxafb_setup(char *options)
-{
-# ifdef CONFIG_FB_PXA_PARAMETERS
- strlcpy(g_options, options, sizeof(g_options));
-# endif
- return 0;
-}
-#else
-module_init(pxafb_init);
-# ifdef CONFIG_FB_PXA_PARAMETERS
-module_param_string(options, g_options, sizeof(g_options), 0);
-MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
-# endif
-#endif
-
-MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * linux/fs/ext3/resize.c
- *
- * Support for resizing an ext3 filesystem while it is mounted.
- *
- * Copyright (C) 2001, 2002 Andreas Dilger <adilger@clusterfs.com>
- *
- * This could probably be made into a module, because it is not often in use.
- */
-
-#include <linux/config.h>
-
-#define EXT3FS_DEBUG
-
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/ext3_jbd.h>
-
-#include <linux/errno.h>
-#include <linux/slab.h>
-
-
-#define outside(b, first, last) ((b) < (first) || (b) >= (last))
-#define inside(b, first, last) ((b) >= (first) && (b) < (last))
-
-static int verify_group_input(struct super_block *sb,
- struct ext3_new_group_data *input)
-{
- struct ext3_sb_info *sbi = EXT3_SB(sb);
- struct ext3_super_block *es = sbi->s_es;
- unsigned start = le32_to_cpu(es->s_blocks_count);
- unsigned end = start + input->blocks_count;
- unsigned group = input->group;
- unsigned itend = input->inode_table + EXT3_SB(sb)->s_itb_per_group;
- unsigned overhead = ext3_bg_has_super(sb, group) ?
- (1 + ext3_bg_num_gdb(sb, group) +
- le16_to_cpu(es->s_reserved_gdt_blocks)) : 0;
- unsigned metaend = start + overhead;
- struct buffer_head *bh;
- int free_blocks_count;
- int err = -EINVAL;
-
- input->free_blocks_count = free_blocks_count =
- input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
-
- if (test_opt(sb, DEBUG))
- printk("EXT3-fs: adding %s group %u: %u blocks "
- "(%d free, %u reserved)\n",
- ext3_bg_has_super(sb, input->group) ? "normal" :
- "no-super", input->group, input->blocks_count,
- free_blocks_count, input->reserved_blocks);
-
- if (group != sbi->s_groups_count)
- ext3_warning(sb, __FUNCTION__,
- "Cannot add at group %u (only %lu groups)",
- input->group, sbi->s_groups_count);
- else if ((start - le32_to_cpu(es->s_first_data_block)) %
- EXT3_BLOCKS_PER_GROUP(sb))
- ext3_warning(sb, __FUNCTION__, "Last group not full");
- else if (input->reserved_blocks > input->blocks_count / 5)
- ext3_warning(sb, __FUNCTION__, "Reserved blocks too high (%u)",
- input->reserved_blocks);
- else if (free_blocks_count < 0)
- ext3_warning(sb, __FUNCTION__, "Bad blocks count %u",
- input->blocks_count);
- else if (!(bh = sb_bread(sb, end - 1)))
- ext3_warning(sb, __FUNCTION__, "Cannot read last block (%u)",
- end - 1);
- else if (outside(input->block_bitmap, start, end))
- ext3_warning(sb, __FUNCTION__,
- "Block bitmap not in group (block %u)",
- input->block_bitmap);
- else if (outside(input->inode_bitmap, start, end))
- ext3_warning(sb, __FUNCTION__,
- "Inode bitmap not in group (block %u)",
- input->inode_bitmap);
- else if (outside(input->inode_table, start, end) ||
- outside(itend - 1, start, end))
- ext3_warning(sb, __FUNCTION__,
- "Inode table not in group (blocks %u-%u)",
- input->inode_table, itend - 1);
- else if (input->inode_bitmap == input->block_bitmap)
- ext3_warning(sb, __FUNCTION__,
- "Block bitmap same as inode bitmap (%u)",
- input->block_bitmap);
- else if (inside(input->block_bitmap, input->inode_table, itend))
- ext3_warning(sb, __FUNCTION__,
- "Block bitmap (%u) in inode table (%u-%u)",
- input->block_bitmap, input->inode_table, itend-1);
- else if (inside(input->inode_bitmap, input->inode_table, itend))
- ext3_warning(sb, __FUNCTION__,
- "Inode bitmap (%u) in inode table (%u-%u)",
- input->inode_bitmap, input->inode_table, itend-1);
- else if (inside(input->block_bitmap, start, metaend))
- ext3_warning(sb, __FUNCTION__,
- "Block bitmap (%u) in GDT table (%u-%u)",
- input->block_bitmap, start, metaend - 1);
- else if (inside(input->inode_bitmap, start, metaend))
- ext3_warning(sb, __FUNCTION__,
- "Inode bitmap (%u) in GDT table (%u-%u)",
- input->inode_bitmap, start, metaend - 1);
- else if (inside(input->inode_table, start, metaend) ||
- inside(itend - 1, start, metaend))
- ext3_warning(sb, __FUNCTION__,
- "Inode table (%u-%u) overlaps GDT table (%u-%u)",
- input->inode_table, itend - 1, start, metaend - 1);
- else {
- brelse(bh);
- err = 0;
- }
-
- return err;
-}
-
-static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
- unsigned long blk)
-{
- struct buffer_head *bh;
- int err;
-
- bh = sb_getblk(sb, blk);
- set_buffer_uptodate(bh);
- if ((err = ext3_journal_get_write_access(handle, bh))) {
- brelse(bh);
- bh = ERR_PTR(err);
- } else
- memset(bh->b_data, 0, sb->s_blocksize);
-
- return bh;
-}
-
-/*
- * To avoid calling the atomic setbit hundreds or thousands of times, we only
- * need to use it within a single byte (to ensure we get endianness right).
- * We can use memset for the rest of the bitmap as there are no other users.
- */
-static void mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
-{
- int i;
-
- if (start_bit >= end_bit)
- return;
-
- ext3_debug("mark end bits +%d through +%d used\n", start_bit, end_bit);
- for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++)
- ext3_set_bit(i, bitmap);
- if (i < end_bit)
- memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3);
-}
-
-/*
- * Set up the block and inode bitmaps, and the inode table for the new group.
- * This doesn't need to be part of the main transaction, since we are only
- * changing blocks outside the actual filesystem. We still do journaling to
- * ensure the recovery is correct in case of a failure just after resize.
- * If any part of this fails, we simply abort the resize.
- *
- * We only pass inode because of the ext3 journal wrappers.
- */
-static int setup_new_group_blocks(struct super_block *sb, struct inode *inode,
- struct ext3_new_group_data *input)
-{
- struct ext3_sb_info *sbi = EXT3_SB(sb);
- unsigned long start = input->group * sbi->s_blocks_per_group +
- le32_to_cpu(sbi->s_es->s_first_data_block);
- int reserved_gdb = ext3_bg_has_super(sb, input->group) ?
- le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0;
- unsigned long gdblocks = ext3_bg_num_gdb(sb, input->group);
- struct buffer_head *bh;
- handle_t *handle;
- unsigned long block;
- int bit;
- int i;
- int err = 0, err2;
-
- handle = ext3_journal_start(inode, reserved_gdb + gdblocks +
- 2 + sbi->s_itb_per_group);
- if (IS_ERR(handle))
- return PTR_ERR(handle);
-
- lock_super(sb);
- if (input->group != sbi->s_groups_count) {
- err = -EBUSY;
- goto exit_journal;
- }
-
- if (IS_ERR(bh = bclean(handle, sb, input->block_bitmap))) {
- err = PTR_ERR(bh);
- goto exit_journal;
- }
-
- if (ext3_bg_has_super(sb, input->group)) {
- ext3_debug("mark backup superblock %#04lx (+0)\n", start);
- ext3_set_bit(0, bh->b_data);
- }
-
- /* Copy all of the GDT blocks into the backup in this group */
- for (i = 0, bit = 1, block = start + 1;
- i < gdblocks; i++, block++, bit++) {
- struct buffer_head *gdb;
-
- ext3_debug("update backup group %#04lx (+%d)\n", block, bit);
-
- gdb = sb_getblk(sb, block);
- set_buffer_uptodate(gdb);
- if ((err = ext3_journal_get_write_access(handle, gdb))) {
- brelse(gdb);
- goto exit_bh;
- }
- memcpy(gdb->b_data, sbi->s_group_desc[i], bh->b_size);
- ext3_journal_dirty_metadata(handle, gdb);
- ext3_set_bit(bit, bh->b_data);
- brelse(gdb);
- }
-
- /* Zero out all of the reserved backup group descriptor table blocks */
- for (i = 0, bit = gdblocks + 1, block = start + bit;
- i < reserved_gdb; i++, block++, bit++) {
- struct buffer_head *gdb;
-
- ext3_debug("clear reserved block %#04lx (+%d)\n", block, bit);
-
- if (IS_ERR(gdb = bclean(handle, sb, block))) {
- err = PTR_ERR(bh);
- goto exit_bh;
- }
- ext3_journal_dirty_metadata(handle, gdb);
- ext3_set_bit(bit, bh->b_data);
- brelse(gdb);
- }
- ext3_debug("mark block bitmap %#04x (+%ld)\n", input->block_bitmap,
- input->block_bitmap - start);
- ext3_set_bit(input->block_bitmap - start, bh->b_data);
- ext3_debug("mark inode bitmap %#04x (+%ld)\n", input->inode_bitmap,
- input->inode_bitmap - start);
- ext3_set_bit(input->inode_bitmap - start, bh->b_data);
-
- /* Zero out all of the inode table blocks */
- for (i = 0, block = input->inode_table, bit = block - start;
- i < sbi->s_itb_per_group; i++, bit++, block++) {
- struct buffer_head *it;
-
- ext3_debug("clear inode block %#04x (+%ld)\n", block, bit);
- if (IS_ERR(it = bclean(handle, sb, block))) {
- err = PTR_ERR(it);
- goto exit_bh;
- }
- ext3_journal_dirty_metadata(handle, it);
- brelse(it);
- ext3_set_bit(bit, bh->b_data);
- }
- mark_bitmap_end(input->blocks_count, EXT3_BLOCKS_PER_GROUP(sb),
- bh->b_data);
- ext3_journal_dirty_metadata(handle, bh);
- brelse(bh);
-
- /* Mark unused entries in inode bitmap used */
- ext3_debug("clear inode bitmap %#04x (+%ld)\n",
- input->inode_bitmap, input->inode_bitmap - start);
- if (IS_ERR(bh = bclean(handle, sb, input->inode_bitmap))) {
- err = PTR_ERR(bh);
- goto exit_journal;
- }
-
- mark_bitmap_end(EXT3_INODES_PER_GROUP(sb), EXT3_BLOCKS_PER_GROUP(sb),
- bh->b_data);
- ext3_journal_dirty_metadata(handle, bh);
-exit_bh:
- brelse(bh);
-
-exit_journal:
- unlock_super(sb);
- if ((err2 = ext3_journal_stop(handle)) && !err)
- err = err2;
-
- return err;
-}
-
-/*
- * Iterate through the groups which hold BACKUP superblock/GDT copies in an
- * ext3 filesystem. The counters should be initialized to 1, 5, and 7 before
- * calling this for the first time. In a sparse filesystem it will be the
- * sequence of powers of 3, 5, and 7: 1, 3, 5, 7, 9, 25, 27, 49, 81, ...
- * For a non-sparse filesystem it will be every group: 1, 2, 3, 4, ...
- */
-unsigned ext3_list_backups(struct super_block *sb, unsigned *three,
- unsigned *five, unsigned *seven)
-{
- unsigned *min = three;
- int mult = 3;
- unsigned ret;
-
- if (!EXT3_HAS_RO_COMPAT_FEATURE(sb,
- EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
- ret = *min;
- *min += 1;
- return ret;
- }
-
- if (*five < *min) {
- min = five;
- mult = 5;
- }
- if (*seven < *min) {
- min = seven;
- mult = 7;
- }
-
- ret = *min;
- *min *= mult;
-
- return ret;
-}
-
-/*
- * Check that all of the backup GDT blocks are held in the primary GDT block.
- * It is assumed that they are stored in group order. Returns the number of
- * groups in current filesystem that have BACKUPS, or -ve error code.
- */
-static int verify_reserved_gdb(struct super_block *sb,
- struct buffer_head *primary)
-{
- const unsigned long blk = primary->b_blocknr;
- const unsigned long end = EXT3_SB(sb)->s_groups_count;
- unsigned three = 1;
- unsigned five = 5;
- unsigned seven = 7;
- unsigned grp;
- __u32 *p = (__u32 *)primary->b_data;
- int gdbackups = 0;
-
- while ((grp = ext3_list_backups(sb, &three, &five, &seven)) < end) {
- if (le32_to_cpu(*p++) != grp * EXT3_BLOCKS_PER_GROUP(sb) + blk){
- ext3_warning(sb, __FUNCTION__,
- "reserved GDT %ld missing grp %d (%ld)\n",
- blk, grp,
- grp * EXT3_BLOCKS_PER_GROUP(sb) + blk);
- return -EINVAL;
- }
- if (++gdbackups > EXT3_ADDR_PER_BLOCK(sb))
- return -EFBIG;
- }
-
- return gdbackups;
-}
-
-/*
- * Called when we need to bring a reserved group descriptor table block into
- * use from the resize inode. The primary copy of the new GDT block currently
- * is an indirect block (under the double indirect block in the resize inode).
- * The new backup GDT blocks will be stored as leaf blocks in this indirect
- * block, in group order. Even though we know all the block numbers we need,
- * we check to ensure that the resize inode has actually reserved these blocks.
- *
- * Don't need to update the block bitmaps because the blocks are still in use.
- *
- * We get all of the error cases out of the way, so that we are sure to not
- * fail once we start modifying the data on disk, because JBD has no rollback.
- */
-static int add_new_gdb(handle_t *handle, struct inode *inode,
- struct ext3_new_group_data *input,
- struct buffer_head **primary)
-{
- struct super_block *sb = inode->i_sb;
- struct ext3_super_block *es = EXT3_SB(sb)->s_es;
- unsigned long gdb_num = input->group / EXT3_DESC_PER_BLOCK(sb);
- unsigned long gdb_off = input->group % EXT3_DESC_PER_BLOCK(sb);
- unsigned long gdblock = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + gdb_num;
- struct buffer_head **o_group_desc, **n_group_desc;
- struct buffer_head *dind;
- int gdbackups;
- struct ext3_iloc iloc;
- __u32 *data;
- int err;
-
- if (test_opt(sb, DEBUG))
- printk("EXT3-fs: ext3_add_new_gdb: adding group block %lu\n",
- gdb_num);
-
- /*
- * If we are not using the primary superblock/GDT copy don't resize,
- * because the user tools have no way of handling this. Probably a
- * bad time to do it anyways.
- */
- if (EXT3_SB(sb)->s_sbh->b_blocknr !=
- le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block)) {
- ext3_warning(sb, __FUNCTION__,
- "won't resize using backup superblock at %lu\n",
- EXT3_SB(sb)->s_sbh->b_blocknr);
- return -EPERM;
- }
-
- *primary = sb_bread(sb, gdblock);
- if (!*primary)
- return -EIO;
-
- if ((gdbackups = verify_reserved_gdb(sb, *primary)) < 0) {
- err = gdbackups;
- goto exit_bh;
- }
-
- data = EXT3_I(inode)->i_data + EXT3_DIND_BLOCK;
- dind = sb_bread(sb, le32_to_cpu(*data));
- if (!dind) {
- err = -EIO;
- goto exit_bh;
- }
-
- data = (__u32 *)dind->b_data;
- if (le32_to_cpu(data[gdb_num % EXT3_ADDR_PER_BLOCK(sb)]) != gdblock) {
- ext3_warning(sb, __FUNCTION__,
- "new group %u GDT block %lu not reserved\n",
- input->group, gdblock);
- err = -EINVAL;
- goto exit_dind;
- }
-
- if ((err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh)))
- goto exit_dind;
-
- if ((err = ext3_journal_get_write_access(handle, *primary)))
- goto exit_sbh;
-
- if ((err = ext3_journal_get_write_access(handle, dind)))
- goto exit_primary;
-
- /* ext3_reserve_inode_write() gets a reference on the iloc */
- if ((err = ext3_reserve_inode_write(handle, inode, &iloc)))
- goto exit_dindj;
-
- n_group_desc = (struct buffer_head **)kmalloc((gdb_num + 1) *
- sizeof(struct buffer_head *), GFP_KERNEL);
- if (!n_group_desc) {
- err = -ENOMEM;
- ext3_warning (sb, __FUNCTION__,
- "not enough memory for %lu groups", gdb_num + 1);
- goto exit_inode;
- }
-
- /*
- * Finally, we have all of the possible failures behind us...
- *
- * Remove new GDT block from inode double-indirect block and clear out
- * the new GDT block for use (which also "frees" the backup GDT blocks
- * from the reserved inode). We don't need to change the bitmaps for
- * these blocks, because they are marked as in-use from being in the
- * reserved inode, and will become GDT blocks (primary and backup).
- */
- /*
- printk("removing block %d = %ld from dindir %ld[%ld]\n",
- ((__u32 *)(dind->b_data))[gdb_off], gdblock, dind->b_blocknr,
- gdb_num); */
- data[gdb_num % EXT3_ADDR_PER_BLOCK(sb)] = 0;
- ext3_journal_dirty_metadata(handle, dind);
- brelse(dind);
- inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9;
- ext3_mark_iloc_dirty(handle, inode, &iloc);
- memset((*primary)->b_data, 0, sb->s_blocksize);
- ext3_journal_dirty_metadata(handle, *primary);
-
- o_group_desc = EXT3_SB(sb)->s_group_desc;
- memcpy(n_group_desc, o_group_desc,
- EXT3_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
- n_group_desc[gdb_num] = *primary;
- EXT3_SB(sb)->s_group_desc = n_group_desc;
- EXT3_SB(sb)->s_gdb_count++;
- kfree(o_group_desc);
-
- es->s_reserved_gdt_blocks =
- cpu_to_le16(le16_to_cpu(es->s_reserved_gdt_blocks) - 1);
- ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
-
- return 0;
-
-exit_inode:
- //ext3_journal_release_buffer(handle, iloc.bh);
- brelse(iloc.bh);
-exit_dindj:
- //ext3_journal_release_buffer(handle, dind);
-exit_primary:
- //ext3_journal_release_buffer(handle, *primary);
-exit_sbh:
- //ext3_journal_release_buffer(handle, *primary);
-exit_dind:
- brelse(dind);
-exit_bh:
- brelse(*primary);
-
- ext3_debug("leaving with error %d\n", err);
- return err;
-}
-
-/*
- * Called when we are adding a new group which has a backup copy of each of
- * the GDT blocks (i.e. sparse group) and there are reserved GDT blocks.
- * We need to add these reserved backup GDT blocks to the resize inode, so
- * that they are kept for future resizing and not allocated to files.
- *
- * Each reserved backup GDT block will go into a different indirect block.
- * The indirect blocks are actually the primary reserved GDT blocks,
- * so we know in advance what their block numbers are. We only get the
- * double-indirect block to verify it is pointing to the primary reserved
- * GDT blocks so we don't overwrite a data block by accident. The reserved
- * backup GDT blocks are stored in their reserved primary GDT block.
- */
-static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
- struct ext3_new_group_data *input)
-{
- struct super_block *sb = inode->i_sb;
- int reserved_gdb =le16_to_cpu(EXT3_SB(sb)->s_es->s_reserved_gdt_blocks);
- struct buffer_head **primary;
- struct buffer_head *dind;
- struct ext3_iloc iloc;
- unsigned long blk;
- __u32 *data, *end;
- int gdbackups = 0;
- int res, i;
- int err;
-
- primary = kmalloc(reserved_gdb * sizeof(*primary), GFP_KERNEL);
- if (!primary)
- return -ENOMEM;
-
- data = EXT3_I(inode)->i_data + EXT3_DIND_BLOCK;
- dind = sb_bread(sb, le32_to_cpu(*data));
- if (!dind) {
- err = -EIO;
- goto exit_free;
- }
-
- blk = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + EXT3_SB(sb)->s_gdb_count;
- data = (__u32 *)dind->b_data + EXT3_SB(sb)->s_gdb_count;
- end = (__u32 *)dind->b_data + EXT3_ADDR_PER_BLOCK(sb);
-
- /* Get each reserved primary GDT block and verify it holds backups */
- for (res = 0; res < reserved_gdb; res++, blk++) {
- if (le32_to_cpu(*data) != blk) {
- ext3_warning(sb, __FUNCTION__,
- "reserved block %lu not at offset %ld\n",
- blk, (long)(data - (__u32 *)dind->b_data));
- err = -EINVAL;
- goto exit_bh;
- }
- primary[res] = sb_bread(sb, blk);
- if (!primary[res]) {
- err = -EIO;
- goto exit_bh;
- }
- if ((gdbackups = verify_reserved_gdb(sb, primary[res])) < 0) {
- brelse(primary[res]);
- err = gdbackups;
- goto exit_bh;
- }
- if (++data >= end)
- data = (__u32 *)dind->b_data;
- }
-
- for (i = 0; i < reserved_gdb; i++) {
- if ((err = ext3_journal_get_write_access(handle, primary[i]))) {
- /*
- int j;
- for (j = 0; j < i; j++)
- ext3_journal_release_buffer(handle, primary[j]);
- */
- goto exit_bh;
- }
- }
-
- if ((err = ext3_reserve_inode_write(handle, inode, &iloc)))
- goto exit_bh;
-
- /*
- * Finally we can add each of the reserved backup GDT blocks from
- * the new group to its reserved primary GDT block.
- */
- blk = input->group * EXT3_BLOCKS_PER_GROUP(sb);
- for (i = 0; i < reserved_gdb; i++) {
- int err2;
- data = (__u32 *)primary[i]->b_data;
- /* printk("reserving backup %lu[%u] = %lu\n",
- primary[i]->b_blocknr, gdbackups,
- blk + primary[i]->b_blocknr); */
- data[gdbackups] = cpu_to_le32(blk + primary[i]->b_blocknr);
- err2 = ext3_journal_dirty_metadata(handle, primary[i]);
- if (!err)
- err = err2;
- }
- inode->i_blocks += reserved_gdb * sb->s_blocksize >> 9;
- ext3_mark_iloc_dirty(handle, inode, &iloc);
-
-exit_bh:
- while (--res >= 0)
- brelse(primary[res]);
- brelse(dind);
-
-exit_free:
- kfree(primary);
-
- return err;
-}
-
-/*
- * Update the backup copies of the ext3 metadata. These don't need to be part
- * of the main resize transaction, because e2fsck will re-write them if there
- * is a problem (basically only OOM will cause a problem). However, we
- * _should_ update the backups if possible, in case the primary gets trashed
- * for some reason and we need to run e2fsck from a backup superblock. The
- * important part is that the new block and inode counts are in the backup
- * superblocks, and the location of the new group metadata in the GDT backups.
- *
- * We do not need lock_super() for this, because these blocks are not
- * otherwise touched by the filesystem code when it is mounted. We don't
- * need to worry about last changing from sbi->s_groups_count, because the
- * worst that can happen is that we do not copy the full number of backups
- * at this time. The resize which changed s_groups_count will backup again.
- *
- * We only pass inode because of the ext3 journal wrappers.
- */
-static void update_backups(struct super_block *sb, struct inode *inode,
- int blk_off, char *data, int size)
-{
- struct ext3_sb_info *sbi = EXT3_SB(sb);
- const unsigned long last = sbi->s_groups_count;
- const int bpg = EXT3_BLOCKS_PER_GROUP(sb);
- unsigned three = 1;
- unsigned five = 5;
- unsigned seven = 7;
- unsigned group;
- int rest = sb->s_blocksize - size;
- handle_t *handle;
- int err = 0, err2;
-
- handle = ext3_journal_start(inode, EXT3_MAX_TRANS_DATA);
- if (IS_ERR(handle)) {
- group = 1;
- err = PTR_ERR(handle);
- goto exit_err;
- }
-
- while ((group = ext3_list_backups(sb, &three, &five, &seven)) < last) {
- struct buffer_head *bh;
-
- /* Out of journal space, and can't get more - abort - so sad */
- if (handle->h_buffer_credits == 0 &&
- ext3_journal_extend(handle, EXT3_MAX_TRANS_DATA) &&
- (err = ext3_journal_restart(handle, EXT3_MAX_TRANS_DATA)))
- break;
-
- bh = sb_getblk(sb, group * bpg + blk_off);
- set_buffer_uptodate(bh);
- ext3_debug(sb, __FUNCTION__, "update metadata backup %#04lx\n",
- bh->b_blocknr);
- if ((err = ext3_journal_get_write_access(handle, bh)))
- break;
- memcpy(bh->b_data, data, size);
- if (rest)
- memset(bh->b_data + size, 0, rest);
- ext3_journal_dirty_metadata(handle, bh);
- brelse(bh);
- }
- if ((err2 = ext3_journal_stop(handle)) && !err)
- err = err2;
-
- /*
- * Ugh! Need to have e2fsck write the backup copies. It is too
- * late to revert the resize, we shouldn't fail just because of
- * the backup copies (they are only needed in case of corruption).
- *
- * However, if we got here we have a journal problem too, so we
- * can't really start a transaction to mark the superblock.
- * Chicken out and just set the flag on the hope it will be written
- * to disk, and if not - we will simply wait until next fsck.
- */
-exit_err:
- if (err) {
- ext3_warning(sb, __FUNCTION__,
- "can't update backup for group %d (err %d), "
- "forcing fsck on next reboot\n", group, err);
- sbi->s_mount_state &= ~EXT3_VALID_FS;
- sbi->s_es->s_state &= ~cpu_to_le16(EXT3_VALID_FS);
- mark_buffer_dirty(sbi->s_sbh);
- }
-}
-
-/* Add group descriptor data to an existing or new group descriptor block.
- * Ensure we handle all possible error conditions _before_ we start modifying
- * the filesystem, because we cannot abort the transaction and not have it
- * write the data to disk.
- *
- * If we are on a GDT block boundary, we need to get the reserved GDT block.
- * Otherwise, we may need to add backup GDT blocks for a sparse group.
- *
- * We only need to hold the superblock lock while we are actually adding
- * in the new group's counts to the superblock. Prior to that we have
- * not really "added" the group at all. We re-check that we are still
- * adding in the last group in case things have changed since verifying.
- */
-int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
-{
- struct ext3_sb_info *sbi = EXT3_SB(sb);
- struct ext3_super_block *es = sbi->s_es;
- int reserved_gdb = ext3_bg_has_super(sb, input->group) ?
- le16_to_cpu(es->s_reserved_gdt_blocks) : 0;
- struct buffer_head *primary = NULL;
- struct ext3_group_desc *gdp;
- struct inode *inode = NULL;
- struct inode bogus;
- handle_t *handle;
- int gdb_off, gdb_num;
- int err, err2;
-
- gdb_num = input->group / EXT3_DESC_PER_BLOCK(sb);
- gdb_off = input->group % EXT3_DESC_PER_BLOCK(sb);
-
- if (gdb_off == 0 && !EXT3_HAS_RO_COMPAT_FEATURE(sb,
- EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
- ext3_warning(sb, __FUNCTION__,
- "Can't resize non-sparse filesystem further\n");
- return -EPERM;
- }
-
- if (reserved_gdb || gdb_off == 0) {
- if (!EXT3_HAS_COMPAT_FEATURE(sb,
- EXT3_FEATURE_COMPAT_RESIZE_INODE)){
- ext3_warning(sb, __FUNCTION__,
- "No reserved GDT blocks, can't resize\n");
- return -EPERM;
- }
- inode = iget(sb, EXT3_RESIZE_INO);
- if (!inode || is_bad_inode(inode)) {
- ext3_warning(sb, __FUNCTION__,
- "Error opening resize inode\n");
- iput(inode);
- return -ENOENT;
- }
- } else {
- /* Used only for ext3 journal wrapper functions to get sb */
- inode = &bogus;
- bogus.i_sb = sb;
- }
-
- if ((err = verify_group_input(sb, input)))
- goto exit_put;
-
- if ((err = setup_new_group_blocks(sb, inode, input)))
- goto exit_put;
-
- /*
- * We will always be modifying at least the superblock and a GDT
- * block. If we are adding a group past the last current GDT block,
- * we will also modify the inode and the dindirect block. If we
- * are adding a group with superblock/GDT backups we will also
- * modify each of the reserved GDT dindirect blocks.
- */
- handle = ext3_journal_start(inode, ext3_bg_has_super(sb, input->group) ?
- 3 + reserved_gdb : 4);
- if (IS_ERR(handle)) {
- err = PTR_ERR(handle);
- goto exit_put;
- }
-
- lock_super(sb);
- if (input->group != EXT3_SB(sb)->s_groups_count) {
- ext3_warning(sb, __FUNCTION__,
- "multiple resizers run on filesystem!\n");
- goto exit_journal;
- }
-
- if ((err = ext3_journal_get_write_access(handle, sbi->s_sbh)))
- goto exit_journal;
-
- /*
- * We will only either add reserved group blocks to a backup group
- * or remove reserved blocks for the first group in a new group block.
- * Doing both would be mean more complex code, and sane people don't
- * use non-sparse filesystems anymore. This is already checked above.
- */
- if (gdb_off) {
- primary = sbi->s_group_desc[gdb_num];
- if ((err = ext3_journal_get_write_access(handle, primary)))
- goto exit_journal;
-
- if (reserved_gdb && ext3_bg_num_gdb(sb, input->group) &&
- (err = reserve_backup_gdb(handle, inode, input)))
- goto exit_journal;
- } else if ((err = add_new_gdb(handle, inode, input, &primary)))
- goto exit_journal;
-
- /* Finally update group descriptor block for new group */
- gdp = (struct ext3_group_desc *)primary->b_data + gdb_off;
-
- gdp->bg_block_bitmap = cpu_to_le32(input->block_bitmap);
- gdp->bg_inode_bitmap = cpu_to_le32(input->inode_bitmap);
- gdp->bg_inode_table = cpu_to_le32(input->inode_table);
- gdp->bg_free_blocks_count = cpu_to_le16(input->free_blocks_count);
- gdp->bg_free_inodes_count = cpu_to_le16(EXT3_INODES_PER_GROUP(sb));
-
- EXT3_SB(sb)->s_groups_count++;
- ext3_journal_dirty_metadata(handle, primary);
-
- /* Update superblock with new block counts */
- es->s_blocks_count = cpu_to_le32(le32_to_cpu(es->s_blocks_count) +
- input->blocks_count);
- es->s_free_blocks_count =
- cpu_to_le32(le32_to_cpu(es->s_free_blocks_count) +
- input->free_blocks_count);
- es->s_r_blocks_count = cpu_to_le32(le32_to_cpu(es->s_r_blocks_count) +
- input->reserved_blocks);
- es->s_inodes_count = cpu_to_le32(le32_to_cpu(es->s_inodes_count) +
- EXT3_INODES_PER_GROUP(sb));
- es->s_free_inodes_count =
- cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) +
- EXT3_INODES_PER_GROUP(sb));
- ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
- sb->s_dirt = 1;
-
-exit_journal:
- unlock_super(sb);
- handle->h_sync = 1;
- if ((err2 = ext3_journal_stop(handle)) && !err)
- err = err2;
- if (!err) {
- update_backups(sb, inode, sbi->s_sbh->b_blocknr, (char *)es,
- sizeof(struct ext3_super_block));
- update_backups(sb, inode, primary->b_blocknr, primary->b_data,
- primary->b_size);
- }
-exit_put:
- if (inode != &bogus)
- iput(inode);
- return err;
-} /* ext3_group_add */
-
-/* Extend the filesystem to the new number of blocks specified. This entry
- * point is only used to extend the current filesystem to the end of the last
- * existing group. It can be accessed via ioctl, or by "remount,resize=<size>"
- * for emergencies (because it has no dependencies on reserved blocks).
- *
- * If we _really_ wanted, we could use default values to call ext3_group_add()
- * allow the "remount" trick to work for arbitrary resizing, assuming enough
- * GDT blocks are reserved to grow to the desired size.
- */
-int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es,
- unsigned long n_blocks_count)
-{
- unsigned long o_blocks_count;
- unsigned long o_groups_count;
- unsigned long last;
- int add;
- struct inode *inode;
- struct buffer_head * bh;
- handle_t *handle;
- int err;
-
- o_blocks_count = le32_to_cpu(es->s_blocks_count);
- o_groups_count = EXT3_SB(sb)->s_groups_count;
-
- if (test_opt(sb, DEBUG))
- printk("EXT3-fs: extending last group from %lu to %lu blocks\n",
- o_blocks_count, n_blocks_count);
-
- if (n_blocks_count == 0 || n_blocks_count == o_blocks_count)
- return 0;
-
- if (n_blocks_count < o_blocks_count) {
- ext3_warning(sb, __FUNCTION__,
- "can't shrink FS - resize aborted");
- return -EBUSY;
- }
-
- /* Handle the remaining blocks in the last group only. */
- last = (o_blocks_count - le32_to_cpu(es->s_first_data_block)) %
- EXT3_BLOCKS_PER_GROUP(sb);
-
- if (last == 0) {
- ext3_warning(sb, __FUNCTION__,
- "need to use ext2online to resize further\n");
- return -EPERM;
- }
-
- add = EXT3_BLOCKS_PER_GROUP(sb) - last;
-
- if (o_blocks_count + add > n_blocks_count)
- add = n_blocks_count - o_blocks_count;
-
- if (o_blocks_count + add < n_blocks_count)
- ext3_warning(sb, __FUNCTION__,
- "will only finish group (%lu blocks, %u new)",
- o_blocks_count + add, add);
-
- /* See if the device is actually as big as what was requested */
- bh = sb_bread(sb, o_blocks_count + add -1);
- if (!bh) {
- ext3_warning(sb, __FUNCTION__,
- "can't read last block, resize aborted");
- return -ENOSPC;
- }
- brelse(bh);
-
- /* Get a bogus inode to "free" the new blocks in this group. */
- if (!(inode = new_inode(sb))) {
- ext3_warning(sb, __FUNCTION__,
- "error getting dummy resize inode");
- return -ENOMEM;
- }
- inode->i_ino = 0;
-
- EXT3_I(inode)->i_state = EXT3_STATE_RESIZE;
-
- /* We will update the superblock, one block bitmap, and
- * one group descriptor via ext3_free_blocks().
- */
- handle = ext3_journal_start(inode, 3);
- if (IS_ERR(handle)) {
- err = PTR_ERR(handle);
- ext3_warning(sb, __FUNCTION__, "error %d on journal start",err);
- goto exit_put;
- }
-
- lock_super(sb);
- if (o_blocks_count != le32_to_cpu(es->s_blocks_count)) {
- ext3_warning(sb, __FUNCTION__,
- "multiple resizers run on filesystem!\n");
- err = -EBUSY;
- goto exit_put;
- }
-
- if ((err = ext3_journal_get_write_access(handle,
- EXT3_SB(sb)->s_sbh))) {
- ext3_warning(sb, __FUNCTION__,
- "error %d on journal write access", err);
- unlock_super(sb);
- ext3_journal_stop(handle);
- goto exit_put;
- }
- es->s_blocks_count = cpu_to_le32(o_blocks_count + add);
- ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
- sb->s_dirt = 1;
- unlock_super(sb);
- ext3_debug("freeing blocks %ld through %ld\n", o_blocks_count,
- o_blocks_count + add);
- ext3_free_blocks(handle, inode, o_blocks_count, add);
- ext3_debug("freed blocks %ld through %ld\n", o_blocks_count,
- o_blocks_count + add);
- if ((err = ext3_journal_stop(handle)))
- goto exit_put;
- if (test_opt(sb, DEBUG))
- printk("EXT3-fs: extended group to %u blocks\n",
- le32_to_cpu(es->s_blocks_count));
- update_backups(sb, inode, EXT3_SB(sb)->s_sbh->b_blocknr, (char *)es,
- sizeof(struct ext3_super_block));
-exit_put:
- iput(inode);
-
- return err;
-} /* ext3_group_extend */
+++ /dev/null
-#
-# Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
-# Licensed under the GPL
-#
-
-# struct stat64 changed the inode field name between 2.2 and 2.4 from st_ino
-# to __st_ino. It stayed in the same place, so as long as the correct name
-# is used, hostfs compiled on 2.2 should work on 2.4 and vice versa.
-
-STAT64_INO_FIELD := $(shell grep -q __st_ino /usr/include/bits/stat.h && \
- echo __)st_ino
-
-hostfs-objs := hostfs_kern.o hostfs_user.o
-
-obj-y =
-obj-$(CONFIG_HOSTFS) += hostfs.o
-
-SINGLE_OBJS = $(foreach f,$(patsubst %.o,%,$(obj-y) $(obj-m)),$($(f)-objs))
-
-USER_OBJS := $(filter %_user.o,$(obj-y) $(obj-m) $(SINGLE_OBJS))
-USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))
-
-USER_CFLAGS += -DSTAT64_INO_FIELD=$(STAT64_INO_FIELD)
-
-$(USER_OBJS) : %.o: %.c
- $(CC) $(CFLAGS_$(notdir $@)) $(USER_CFLAGS) -c -o $@ $<
+++ /dev/null
-#ifndef __UM_FS_HOSTFS
-#define __UM_FS_HOSTFS
-
-#include "os.h"
-
-/* These are exactly the same definitions as in fs.h, but the names are
- * changed so that this file can be included in both kernel and user files.
- */
-
-#define HOSTFS_ATTR_MODE 1
-#define HOSTFS_ATTR_UID 2
-#define HOSTFS_ATTR_GID 4
-#define HOSTFS_ATTR_SIZE 8
-#define HOSTFS_ATTR_ATIME 16
-#define HOSTFS_ATTR_MTIME 32
-#define HOSTFS_ATTR_CTIME 64
-#define HOSTFS_ATTR_ATIME_SET 128
-#define HOSTFS_ATTR_MTIME_SET 256
-#define HOSTFS_ATTR_FORCE 512 /* Not a change, but a change it */
-#define HOSTFS_ATTR_ATTR_FLAG 1024
-
-struct hostfs_iattr {
- unsigned int ia_valid;
- mode_t ia_mode;
- uid_t ia_uid;
- gid_t ia_gid;
- loff_t ia_size;
- struct timespec ia_atime;
- struct timespec ia_mtime;
- struct timespec ia_ctime;
- unsigned int ia_attr_flags;
-};
-
-extern int stat_file(const char *path, unsigned long long *inode_out,
- int *mode_out, int *nlink_out, int *uid_out, int *gid_out,
- unsigned long long *size_out, struct timespec *atime_out,
- struct timespec *mtime_out, struct timespec *ctime_out,
- int *blksize_out, unsigned long long *blocks_out);
-extern int access_file(char *path, int r, int w, int x);
-extern int open_file(char *path, int r, int w, int append);
-extern int file_type(const char *path, int *rdev);
-extern void *open_dir(char *path, int *err_out);
-extern char *read_dir(void *stream, unsigned long long *pos,
- unsigned long long *ino_out, int *len_out);
-extern void close_file(void *stream);
-extern void close_dir(void *stream);
-extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
-extern int write_file(int fd, unsigned long long *offset, const char *buf,
- int len);
-extern int lseek_file(int fd, long long offset, int whence);
-extern int file_create(char *name, int ur, int uw, int ux, int gr,
- int gw, int gx, int or, int ow, int ox);
-extern int set_attr(const char *file, struct hostfs_iattr *attrs);
-extern int make_symlink(const char *from, const char *to);
-extern int unlink_file(const char *file);
-extern int do_mkdir(const char *file, int mode);
-extern int do_rmdir(const char *file);
-extern int do_mknod(const char *file, int mode, int dev);
-extern int link_file(const char *from, const char *to);
-extern int do_readlink(char *file, char *buf, int size);
-extern int rename_file(char *from, char *to);
-extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
- long long *bfree_out, long long *bavail_out,
- long long *files_out, long long *ffree_out,
- void *fsid_out, int fsid_size, long *namelen_out,
- long *spare_out);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- *
- * Ported the filesystem routines to 2.5.
- * 2003-02-10 Petr Baudis <pasky@ucw.cz>
- */
-
-#include <linux/stddef.h>
-#include <linux/fs.h>
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/blkdev.h>
-#include <linux/list.h>
-#include <linux/buffer_head.h>
-#include <linux/root_dev.h>
-#include <linux/statfs.h>
-#include <asm/uaccess.h>
-#include "hostfs.h"
-#include "kern_util.h"
-#include "kern.h"
-#include "user_util.h"
-#include "2_5compat.h"
-#include "init.h"
-
-struct hostfs_inode_info {
- char *host_filename;
- int fd;
- int mode;
- struct inode vfs_inode;
-};
-
-static inline struct hostfs_inode_info *HOSTFS_I(struct inode *inode)
-{
- return(list_entry(inode, struct hostfs_inode_info, vfs_inode));
-}
-
-#define FILE_HOSTFS_I(file) HOSTFS_I((file)->f_dentry->d_inode)
-
-int hostfs_d_delete(struct dentry *dentry)
-{
- return(1);
-}
-
-struct dentry_operations hostfs_dentry_ops = {
- .d_delete = hostfs_d_delete,
-};
-
-/* Changed in hostfs_args before the kernel starts running */
-static char *root_ino = "/";
-static int append = 0;
-
-#define HOSTFS_SUPER_MAGIC 0x00c0ffee
-
-static struct inode_operations hostfs_iops;
-static struct inode_operations hostfs_dir_iops;
-static struct address_space_operations hostfs_link_aops;
-
-static int __init hostfs_args(char *options, int *add)
-{
- char *ptr;
-
- ptr = strchr(options, ',');
- if(ptr != NULL)
- *ptr++ = '\0';
- if(*options != '\0')
- root_ino = options;
-
- options = ptr;
- while(options){
- ptr = strchr(options, ',');
- if(ptr != NULL)
- *ptr++ = '\0';
- if(*options != '\0'){
- if(!strcmp(options, "append"))
- append = 1;
- else printf("hostfs_args - unsupported option - %s\n",
- options);
- }
- options = ptr;
- }
- return(0);
-}
-
-__uml_setup("hostfs=", hostfs_args,
-"hostfs=<root dir>,<flags>,...\n"
-" This is used to set hostfs parameters. The root directory argument\n"
-" is used to confine all hostfs mounts to within the specified directory\n"
-" tree on the host. If this isn't specified, then a user inside UML can\n"
-" mount anything on the host that's accessible to the user that's running\n"
-" it.\n"
-" The only flag currently supported is 'append', which specifies that all\n"
-" files opened by hostfs will be opened in append mode.\n\n"
-);
-
-static char *dentry_name(struct dentry *dentry, int extra)
-{
- struct dentry *parent;
- char *root, *name;
- int len;
-
- len = 0;
- parent = dentry;
- while(parent->d_parent != parent){
- len += parent->d_name.len + 1;
- parent = parent->d_parent;
- }
-
- root = HOSTFS_I(parent->d_inode)->host_filename;
- len += strlen(root);
- name = kmalloc(len + extra + 1, GFP_KERNEL);
- if(name == NULL) return(NULL);
-
- name[len] = '\0';
- parent = dentry;
- while(parent->d_parent != parent){
- len -= parent->d_name.len + 1;
- name[len] = '/';
- strncpy(&name[len + 1], parent->d_name.name,
- parent->d_name.len);
- parent = parent->d_parent;
- }
- strncpy(name, root, strlen(root));
- return(name);
-}
-
-static char *inode_name(struct inode *ino, int extra)
-{
- struct dentry *dentry;
-
- dentry = list_entry(ino->i_dentry.next, struct dentry, d_alias);
- return(dentry_name(dentry, extra));
-}
-
-static int read_name(struct inode *ino, char *name)
-{
- /* The non-int inode fields are copied into ints by stat_file and
- * then copied into the inode because passing the actual pointers
- * in and having them treated as int * breaks on big-endian machines
- */
- int err;
- int i_mode, i_nlink, i_blksize;
- unsigned long long i_size;
- unsigned long long i_ino;
- unsigned long long i_blocks;
-
- err = stat_file(name, &i_ino, &i_mode, &i_nlink, &ino->i_uid,
- &ino->i_gid, &i_size, &ino->i_atime, &ino->i_mtime,
- &ino->i_ctime, &i_blksize, &i_blocks);
- if(err)
- return(err);
-
- ino->i_ino = i_ino;
- ino->i_mode = i_mode;
- ino->i_nlink = i_nlink;
- ino->i_size = i_size;
- ino->i_blksize = i_blksize;
- ino->i_blocks = i_blocks;
- if((ino->i_sb->s_dev == ROOT_DEV) && (ino->i_uid == getuid()))
- ino->i_uid = 0;
- return(0);
-}
-
-static char *follow_link(char *link)
-{
- int len, n;
- char *name, *resolved, *end;
-
- len = 64;
- while(1){
- n = -ENOMEM;
- name = kmalloc(len, GFP_KERNEL);
- if(name == NULL)
- goto out;
-
- n = do_readlink(link, name, len);
- if(n < len)
- break;
- len *= 2;
- kfree(name);
- }
- if(n < 0)
- goto out_free;
-
- if(*name == '/')
- return(name);
-
- end = strrchr(link, '/');
- if(end == NULL)
- return(name);
-
- *(end + 1) = '\0';
- len = strlen(link) + strlen(name) + 1;
-
- resolved = kmalloc(len, GFP_KERNEL);
- if(resolved == NULL){
- n = -ENOMEM;
- goto out_free;
- }
-
- sprintf(resolved, "%s%s", link, name);
- kfree(name);
- kfree(link);
- return(resolved);
-
- out_free:
- kfree(name);
- out:
- return(ERR_PTR(n));
-}
-
-static int read_inode(struct inode *ino)
-{
- char *name;
- int err = 0;
-
- /* Unfortunately, we are called from iget() when we don't have a dentry
- * allocated yet.
- */
- if(list_empty(&ino->i_dentry))
- goto out;
-
- err = -ENOMEM;
- name = inode_name(ino, 0);
- if(name == NULL)
- goto out;
-
- if(file_type(name, NULL) == OS_TYPE_SYMLINK){
- name = follow_link(name);
- if(IS_ERR(name)){
- err = PTR_ERR(name);
- goto out;
- }
- }
-
- err = read_name(ino, name);
- kfree(name);
- out:
- return(err);
-}
-
-int hostfs_statfs(struct super_block *sb, struct kstatfs *sf)
-{
- /* do_statfs uses struct statfs64 internally, but the linux kernel
- * struct statfs still has 32-bit versions for most of these fields,
- * so we convert them here
- */
- int err;
- long long f_blocks;
- long long f_bfree;
- long long f_bavail;
- long long f_files;
- long long f_ffree;
-
- err = do_statfs(HOSTFS_I(sb->s_root->d_inode)->host_filename,
- &sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
- &f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
- &sf->f_namelen, sf->f_spare);
- if(err) return(err);
- sf->f_blocks = f_blocks;
- sf->f_bfree = f_bfree;
- sf->f_bavail = f_bavail;
- sf->f_files = f_files;
- sf->f_ffree = f_ffree;
- sf->f_type = HOSTFS_SUPER_MAGIC;
- return(0);
-}
-
-static struct inode *hostfs_alloc_inode(struct super_block *sb)
-{
- struct hostfs_inode_info *hi;
-
- hi = kmalloc(sizeof(*hi), GFP_KERNEL);
- if(hi == NULL)
- return(NULL);
-
- *hi = ((struct hostfs_inode_info) { .host_filename = NULL,
- .fd = -1,
- .mode = 0 });
- inode_init_once(&hi->vfs_inode);
- return(&hi->vfs_inode);
-}
-
-static void hostfs_destroy_inode(struct inode *inode)
-{
- if(HOSTFS_I(inode)->host_filename)
- kfree(HOSTFS_I(inode)->host_filename);
-
- if(HOSTFS_I(inode)->fd != -1)
- close_file(&HOSTFS_I(inode)->fd);
-
- kfree(HOSTFS_I(inode));
-}
-
-static void hostfs_read_inode(struct inode *inode)
-{
- read_inode(inode);
-}
-
-static struct super_operations hostfs_sbops = {
- .alloc_inode = hostfs_alloc_inode,
- .destroy_inode = hostfs_destroy_inode,
- .read_inode = hostfs_read_inode,
- .statfs = hostfs_statfs,
-};
-
-int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
-{
- void *dir;
- char *name;
- unsigned long long next, ino;
- int error, len;
-
- name = dentry_name(file->f_dentry, 0);
- if(name == NULL) return(-ENOMEM);
- dir = open_dir(name, &error);
- kfree(name);
- if(dir == NULL) return(-error);
- next = file->f_pos;
- while((name = read_dir(dir, &next, &ino, &len)) != NULL){
- error = (*filldir)(ent, name, len, file->f_pos,
- ino, DT_UNKNOWN);
- if(error) break;
- file->f_pos = next;
- }
- close_dir(dir);
- return(0);
-}
-
-int hostfs_file_open(struct inode *ino, struct file *file)
-{
- char *name;
- int mode = 0, r = 0, w = 0, fd;
-
- mode = file->f_mode & (FMODE_READ | FMODE_WRITE);
- if((mode & HOSTFS_I(ino)->mode) == mode)
- return(0);
-
- /* The file may already have been opened, but with the wrong access,
- * so this resets things and reopens the file with the new access.
- */
- if(HOSTFS_I(ino)->fd != -1){
- close_file(&HOSTFS_I(ino)->fd);
- HOSTFS_I(ino)->fd = -1;
- }
-
- HOSTFS_I(ino)->mode |= mode;
- if(HOSTFS_I(ino)->mode & FMODE_READ)
- r = 1;
- if(HOSTFS_I(ino)->mode & FMODE_WRITE)
- w = 1;
- if(w)
- r = 1;
-
- name = dentry_name(file->f_dentry, 0);
- if(name == NULL)
- return(-ENOMEM);
-
- fd = open_file(name, r, w, append);
- kfree(name);
- if(fd < 0) return(fd);
- FILE_HOSTFS_I(file)->fd = fd;
-
- return(0);
-}
-
-int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
-{
- return(0);
-}
-
-static struct file_operations hostfs_file_fops = {
- .llseek = generic_file_llseek,
- .read = generic_file_read,
- .write = generic_file_write,
- .mmap = generic_file_mmap,
- .open = hostfs_file_open,
- .release = NULL,
- .fsync = hostfs_fsync,
-};
-
-static struct file_operations hostfs_dir_fops = {
- .readdir = hostfs_readdir,
- .read = generic_read_dir,
-};
-
-int hostfs_writepage(struct page *page, struct writeback_control *wbc)
-{
- struct address_space *mapping = page->mapping;
- struct inode *inode = mapping->host;
- char *buffer;
- unsigned long long base;
- int count = PAGE_CACHE_SIZE;
- int end_index = inode->i_size >> PAGE_CACHE_SHIFT;
- int err;
-
- if (page->index >= end_index)
- count = inode->i_size & (PAGE_CACHE_SIZE-1);
-
- buffer = kmap(page);
- base = ((unsigned long long) page->index) << PAGE_CACHE_SHIFT;
-
- err = write_file(HOSTFS_I(inode)->fd, &base, buffer, count);
- if(err != count){
- ClearPageUptodate(page);
- goto out;
- }
-
- if (base > inode->i_size)
- inode->i_size = base;
-
- if (PageError(page))
- ClearPageError(page);
- err = 0;
-
- out:
- kunmap(page);
-
- unlock_page(page);
- return err;
-}
-
-int hostfs_readpage(struct file *file, struct page *page)
-{
- char *buffer;
- long long start;
- int err = 0;
-
- start = (long long) page->index << PAGE_CACHE_SHIFT;
- buffer = kmap(page);
- err = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
- PAGE_CACHE_SIZE);
- if(err < 0) goto out;
-
- memset(&buffer[err], 0, PAGE_CACHE_SIZE - err);
-
- flush_dcache_page(page);
- SetPageUptodate(page);
- if (PageError(page)) ClearPageError(page);
- err = 0;
- out:
- kunmap(page);
- unlock_page(page);
- return(err);
-}
-
-int hostfs_prepare_write(struct file *file, struct page *page,
- unsigned int from, unsigned int to)
-{
- char *buffer;
- long long start, tmp;
- int err;
-
- start = (long long) page->index << PAGE_CACHE_SHIFT;
- buffer = kmap(page);
- if(from != 0){
- tmp = start;
- err = read_file(FILE_HOSTFS_I(file)->fd, &tmp, buffer,
- from);
- if(err < 0) goto out;
- }
- if(to != PAGE_CACHE_SIZE){
- start += to;
- err = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer + to,
- PAGE_CACHE_SIZE - to);
- if(err < 0) goto out;
- }
- err = 0;
- out:
- kunmap(page);
- return(err);
-}
-
-int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
- unsigned to)
-{
- struct address_space *mapping = page->mapping;
- struct inode *inode = mapping->host;
- char *buffer;
- long long start;
- int err = 0;
-
- start = (long long) (page->index << PAGE_CACHE_SHIFT) + from;
- buffer = kmap(page);
- err = write_file(FILE_HOSTFS_I(file)->fd, &start, buffer + from,
- to - from);
- if(err > 0) err = 0;
- if(!err && (start > inode->i_size))
- inode->i_size = start;
-
- kunmap(page);
- return(err);
-}
-
-static struct address_space_operations hostfs_aops = {
- .writepage = hostfs_writepage,
- .readpage = hostfs_readpage,
-/* .set_page_dirty = __set_page_dirty_nobuffers, */
- .prepare_write = hostfs_prepare_write,
- .commit_write = hostfs_commit_write
-};
-
-static int init_inode(struct inode *inode, struct dentry *dentry)
-{
- char *name;
- int type, err = -ENOMEM, rdev;
-
- if(dentry){
- name = dentry_name(dentry, 0);
- if(name == NULL)
- goto out;
- type = file_type(name, &rdev);
- kfree(name);
- }
- else type = OS_TYPE_DIR;
-
- err = 0;
- if(type == OS_TYPE_SYMLINK)
- inode->i_op = &page_symlink_inode_operations;
- else if(type == OS_TYPE_DIR)
- inode->i_op = &hostfs_dir_iops;
- else inode->i_op = &hostfs_iops;
-
- if(type == OS_TYPE_DIR) inode->i_fop = &hostfs_dir_fops;
- else inode->i_fop = &hostfs_file_fops;
-
- if(type == OS_TYPE_SYMLINK)
- inode->i_mapping->a_ops = &hostfs_link_aops;
- else inode->i_mapping->a_ops = &hostfs_aops;
-
- switch (type) {
- case OS_TYPE_CHARDEV:
- init_special_inode(inode, S_IFCHR, rdev);
- break;
- case OS_TYPE_BLOCKDEV:
- init_special_inode(inode, S_IFBLK, rdev);
- break;
- case OS_TYPE_FIFO:
- init_special_inode(inode, S_IFIFO, 0);
- break;
- case OS_TYPE_SOCK:
- init_special_inode(inode, S_IFSOCK, 0);
- break;
- }
- out:
- return(err);
-}
-
-int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
-{
- struct inode *inode;
- char *name;
- int error, fd;
-
- error = -ENOMEM;
- inode = iget(dir->i_sb, 0);
- if(inode == NULL) goto out;
-
- error = init_inode(inode, dentry);
- if(error)
- goto out_put;
-
- error = -ENOMEM;
- name = dentry_name(dentry, 0);
- if(name == NULL)
- goto out_put;
-
- fd = file_create(name,
- mode & S_IRUSR, mode & S_IWUSR, mode & S_IXUSR,
- mode & S_IRGRP, mode & S_IWGRP, mode & S_IXGRP,
- mode & S_IROTH, mode & S_IWOTH, mode & S_IXOTH);
- if(fd < 0)
- error = fd;
- else error = read_name(inode, name);
-
- kfree(name);
- if(error)
- goto out_put;
-
- HOSTFS_I(inode)->fd = fd;
- HOSTFS_I(inode)->mode = FMODE_READ | FMODE_WRITE;
- d_instantiate(dentry, inode);
- return(0);
-
- out_put:
- iput(inode);
- out:
- return(error);
-}
-
-struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
- struct nameidata *nd)
-{
- struct inode *inode;
- char *name;
- int err;
-
- err = -ENOMEM;
- inode = iget(ino->i_sb, 0);
- if(inode == NULL)
- goto out;
-
- err = init_inode(inode, dentry);
- if(err)
- goto out_put;
-
- err = -ENOMEM;
- name = dentry_name(dentry, 0);
- if(name == NULL)
- goto out_put;
-
- err = read_name(inode, name);
- kfree(name);
- if(err == -ENOENT){
- iput(inode);
- inode = NULL;
- }
- else if(err)
- goto out_put;
-
- d_add(dentry, inode);
- dentry->d_op = &hostfs_dentry_ops;
- return(NULL);
-
- out_put:
- iput(inode);
- out:
- return(ERR_PTR(err));
-}
-
-static char *inode_dentry_name(struct inode *ino, struct dentry *dentry)
-{
- char *file;
- int len;
-
- file = inode_name(ino, dentry->d_name.len + 1);
- if(file == NULL) return(NULL);
- strcat(file, "/");
- len = strlen(file);
- strncat(file, dentry->d_name.name, dentry->d_name.len);
- file[len + dentry->d_name.len] = '\0';
- return(file);
-}
-
-int hostfs_link(struct dentry *to, struct inode *ino, struct dentry *from)
-{
- char *from_name, *to_name;
- int err;
-
- if((from_name = inode_dentry_name(ino, from)) == NULL)
- return(-ENOMEM);
- to_name = dentry_name(to, 0);
- if(to_name == NULL){
- kfree(from_name);
- return(-ENOMEM);
- }
- err = link_file(to_name, from_name);
- kfree(from_name);
- kfree(to_name);
- return(err);
-}
-
-int hostfs_unlink(struct inode *ino, struct dentry *dentry)
-{
- char *file;
- int err;
-
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
- if(append)
- return(-EPERM);
-
- err = unlink_file(file);
- kfree(file);
- return(err);
-}
-
-int hostfs_symlink(struct inode *ino, struct dentry *dentry, const char *to)
-{
- char *file;
- int err;
-
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
- err = make_symlink(file, to);
- kfree(file);
- return(err);
-}
-
-int hostfs_mkdir(struct inode *ino, struct dentry *dentry, int mode)
-{
- char *file;
- int err;
-
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
- err = do_mkdir(file, mode);
- kfree(file);
- return(err);
-}
-
-int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
-{
- char *file;
- int err;
-
- if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
- err = do_rmdir(file);
- kfree(file);
- return(err);
-}
-
-int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-{
- struct inode *inode;
- char *name;
- int err = -ENOMEM;
-
- inode = iget(dir->i_sb, 0);
- if(inode == NULL)
- goto out;
-
- err = init_inode(inode, dentry);
- if(err)
- goto out_put;
-
- err = -ENOMEM;
- name = dentry_name(dentry, 0);
- if(name == NULL)
- goto out_put;
-
- init_special_inode(inode, mode, dev);
- err = do_mknod(name, mode, dev);
- if(err)
- goto out_free;
-
- err = read_name(inode, name);
- kfree(name);
- if(err)
- goto out_put;
-
- d_instantiate(dentry, inode);
- return(0);
-
- out_free:
- kfree(name);
- out_put:
- iput(inode);
- out:
- return(err);
-}
-
-int hostfs_rename(struct inode *from_ino, struct dentry *from,
- struct inode *to_ino, struct dentry *to)
-{
- char *from_name, *to_name;
- int err;
-
- if((from_name = inode_dentry_name(from_ino, from)) == NULL)
- return(-ENOMEM);
- if((to_name = inode_dentry_name(to_ino, to)) == NULL){
- kfree(from_name);
- return(-ENOMEM);
- }
- err = rename_file(from_name, to_name);
- kfree(from_name);
- kfree(to_name);
- return(err);
-}
-
-void hostfs_truncate(struct inode *ino)
-{
- not_implemented();
-}
-
-int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
-{
- char *name;
- int r = 0, w = 0, x = 0, err;
-
- if(desired & MAY_READ) r = 1;
- if(desired & MAY_WRITE) w = 1;
- if(desired & MAY_EXEC) x = 1;
- name = inode_name(ino, 0);
- if(name == NULL) return(-ENOMEM);
- err = access_file(name, r, w, x);
- kfree(name);
- if(!err) err = vfs_permission(ino, desired);
- return(err);
-}
-
-int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct hostfs_iattr attrs;
- char *name;
- int err;
-
- if(append)
- attr->ia_valid &= ~ATTR_SIZE;
-
- attrs.ia_valid = 0;
- if(attr->ia_valid & ATTR_MODE){
- attrs.ia_valid |= HOSTFS_ATTR_MODE;
- attrs.ia_mode = attr->ia_mode;
- }
- if(attr->ia_valid & ATTR_UID){
- if((dentry->d_inode->i_sb->s_dev == ROOT_DEV) &&
- (attr->ia_uid == 0))
- attr->ia_uid = getuid();
- attrs.ia_valid |= HOSTFS_ATTR_UID;
- attrs.ia_uid = attr->ia_uid;
- }
- if(attr->ia_valid & ATTR_GID){
- if((dentry->d_inode->i_sb->s_dev == ROOT_DEV) &&
- (attr->ia_gid == 0))
- attr->ia_gid = getuid();
- attrs.ia_valid |= HOSTFS_ATTR_GID;
- attrs.ia_gid = attr->ia_gid;
- }
- if(attr->ia_valid & ATTR_SIZE){
- attrs.ia_valid |= HOSTFS_ATTR_SIZE;
- attrs.ia_size = attr->ia_size;
- }
- if(attr->ia_valid & ATTR_ATIME){
- attrs.ia_valid |= HOSTFS_ATTR_ATIME;
- attrs.ia_atime = attr->ia_atime;
- }
- if(attr->ia_valid & ATTR_MTIME){
- attrs.ia_valid |= HOSTFS_ATTR_MTIME;
- attrs.ia_mtime = attr->ia_mtime;
- }
- if(attr->ia_valid & ATTR_CTIME){
- attrs.ia_valid |= HOSTFS_ATTR_CTIME;
- attrs.ia_ctime = attr->ia_ctime;
- }
- if(attr->ia_valid & ATTR_ATIME_SET){
- attrs.ia_valid |= HOSTFS_ATTR_ATIME_SET;
- }
- if(attr->ia_valid & ATTR_MTIME_SET){
- attrs.ia_valid |= HOSTFS_ATTR_MTIME_SET;
- }
- name = dentry_name(dentry, 0);
- if(name == NULL) return(-ENOMEM);
- err = set_attr(name, &attrs);
- kfree(name);
- if(err)
- return(err);
-
- return(inode_setattr(dentry->d_inode, attr));
-}
-
-int hostfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
-{
- generic_fillattr(dentry->d_inode, stat);
- return(0);
-}
-
-static struct inode_operations hostfs_iops = {
- .create = hostfs_create,
- .link = hostfs_link,
- .unlink = hostfs_unlink,
- .symlink = hostfs_symlink,
- .mkdir = hostfs_mkdir,
- .rmdir = hostfs_rmdir,
- .mknod = hostfs_mknod,
- .rename = hostfs_rename,
- .truncate = hostfs_truncate,
- .permission = hostfs_permission,
- .setattr = hostfs_setattr,
- .getattr = hostfs_getattr,
-};
-
-static struct inode_operations hostfs_dir_iops = {
- .create = hostfs_create,
- .lookup = hostfs_lookup,
- .link = hostfs_link,
- .unlink = hostfs_unlink,
- .symlink = hostfs_symlink,
- .mkdir = hostfs_mkdir,
- .rmdir = hostfs_rmdir,
- .mknod = hostfs_mknod,
- .rename = hostfs_rename,
- .truncate = hostfs_truncate,
- .permission = hostfs_permission,
- .setattr = hostfs_setattr,
- .getattr = hostfs_getattr,
-};
-
-int hostfs_link_readpage(struct file *file, struct page *page)
-{
- char *buffer, *name;
- long long start;
- int err;
-
- start = page->index << PAGE_CACHE_SHIFT;
- buffer = kmap(page);
- name = inode_name(page->mapping->host, 0);
- if(name == NULL) return(-ENOMEM);
- err = do_readlink(name, buffer, PAGE_CACHE_SIZE);
- kfree(name);
- if(err == PAGE_CACHE_SIZE)
- err = -E2BIG;
- else if(err > 0){
- flush_dcache_page(page);
- SetPageUptodate(page);
- if (PageError(page)) ClearPageError(page);
- err = 0;
- }
- kunmap(page);
- unlock_page(page);
- return(err);
-}
-
-static struct address_space_operations hostfs_link_aops = {
- .readpage = hostfs_link_readpage,
-};
-
-static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
-{
- struct inode *root_inode;
- char *name, *data = d;
- int err;
-
- sb->s_blocksize = 1024;
- sb->s_blocksize_bits = 10;
- sb->s_magic = HOSTFS_SUPER_MAGIC;
- sb->s_op = &hostfs_sbops;
-
- if((data == NULL) || (*data == '\0'))
- data = root_ino;
-
- err = -ENOMEM;
- name = kmalloc(strlen(data) + 1, GFP_KERNEL);
- if(name == NULL)
- goto out;
-
- strcpy(name, data);
-
- root_inode = iget(sb, 0);
- if(root_inode == NULL)
- goto out_free;
-
- err = init_inode(root_inode, NULL);
- if(err)
- goto out_put;
-
- HOSTFS_I(root_inode)->host_filename = name;
-
- err = -ENOMEM;
- sb->s_root = d_alloc_root(root_inode);
- if(sb->s_root == NULL)
- goto out_put;
-
- err = read_inode(root_inode);
- if(err)
- goto out_put;
-
- return(0);
-
- out_put:
- iput(root_inode);
- out_free:
- kfree(name);
- out:
- return(err);
-}
-
-static struct super_block *hostfs_read_sb(struct file_system_type *type,
- int flags, const char *dev_name,
- void *data)
-{
- return(get_sb_nodev(type, flags, data, hostfs_fill_sb_common));
-}
-
-static struct file_system_type hostfs_type = {
- .owner = THIS_MODULE,
- .name = "hostfs",
- .get_sb = hostfs_read_sb,
- .kill_sb = kill_anon_super,
- .fs_flags = 0,
-};
-
-static int __init init_hostfs(void)
-{
- return(register_filesystem(&hostfs_type));
-}
-
-static void __exit exit_hostfs(void)
-{
- unregister_filesystem(&hostfs_type);
-}
-
-module_init(init_hostfs)
-module_exit(exit_hostfs)
-MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <errno.h>
-#include <utime.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/vfs.h>
-#include "hostfs.h"
-#include "kern_util.h"
-#include "user.h"
-
-int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
- int *nlink_out, int *uid_out, int *gid_out,
- unsigned long long *size_out, struct timespec *atime_out,
- struct timespec *mtime_out, struct timespec *ctime_out,
- int *blksize_out, unsigned long long *blocks_out)
-{
- struct stat64 buf;
-
- if(lstat64(path, &buf) < 0)
- return(-errno);
-
- /* See the Makefile for why STAT64_INO_FIELD is passed in
- * by the build
- */
- if(inode_out != NULL) *inode_out = buf.STAT64_INO_FIELD;
- if(mode_out != NULL) *mode_out = buf.st_mode;
- if(nlink_out != NULL) *nlink_out = buf.st_nlink;
- if(uid_out != NULL) *uid_out = buf.st_uid;
- if(gid_out != NULL) *gid_out = buf.st_gid;
- if(size_out != NULL) *size_out = buf.st_size;
- if(atime_out != NULL) {
- atime_out->tv_sec = buf.st_atime;
- atime_out->tv_nsec = 0;
- }
- if(mtime_out != NULL) {
- mtime_out->tv_sec = buf.st_mtime;
- mtime_out->tv_nsec = 0;
- }
- if(ctime_out != NULL) {
- ctime_out->tv_sec = buf.st_ctime;
- ctime_out->tv_nsec = 0;
- }
- if(blksize_out != NULL) *blksize_out = buf.st_blksize;
- if(blocks_out != NULL) *blocks_out = buf.st_blocks;
- return(0);
-}
-
-int file_type(const char *path, int *rdev)
-{
- struct stat64 buf;
-
- if(lstat64(path, &buf) < 0)
- return(-errno);
- if(rdev != NULL)
- *rdev = buf.st_rdev;
-
- if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
- else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
- else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
- else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
- else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
- else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
- else return(OS_TYPE_FILE);
-}
-
-int access_file(char *path, int r, int w, int x)
-{
- int mode = 0;
-
- if(r) mode = R_OK;
- if(w) mode |= W_OK;
- if(x) mode |= X_OK;
- if(access(path, mode) != 0) return(-errno);
- else return(0);
-}
-
-int open_file(char *path, int r, int w, int append)
-{
- int mode = 0, fd;
-
- if(r && !w)
- mode = O_RDONLY;
- else if(!r && w)
- mode = O_WRONLY;
- else if(r && w)
- mode = O_RDWR;
- else panic("Impossible mode in open_file");
-
- if(append)
- mode |= O_APPEND;
- fd = open64(path, mode);
- if(fd < 0) return(-errno);
- else return(fd);
-}
-
-void *open_dir(char *path, int *err_out)
-{
- DIR *dir;
-
- dir = opendir(path);
- *err_out = errno;
- if(dir == NULL) return(NULL);
- return(dir);
-}
-
-char *read_dir(void *stream, unsigned long long *pos,
- unsigned long long *ino_out, int *len_out)
-{
- DIR *dir = stream;
- struct dirent *ent;
-
- seekdir(dir, *pos);
- ent = readdir(dir);
- if(ent == NULL) return(NULL);
- *len_out = strlen(ent->d_name);
- *ino_out = ent->d_ino;
- *pos = telldir(dir);
- return(ent->d_name);
-}
-
-int read_file(int fd, unsigned long long *offset, char *buf, int len)
-{
- int n;
-
- n = pread64(fd, buf, len, *offset);
- if(n < 0) return(-errno);
- *offset += n;
- return(n);
-}
-
-int write_file(int fd, unsigned long long *offset, const char *buf, int len)
-{
- int n;
-
- n = pwrite64(fd, buf, len, *offset);
- if(n < 0) return(-errno);
- *offset += n;
- return(n);
-}
-
-int lseek_file(int fd, long long offset, int whence)
-{
- int ret;
-
- ret = lseek64(fd, offset, whence);
- if(ret < 0) return(-errno);
- return(0);
-}
-
-void close_file(void *stream)
-{
- close(*((int *) stream));
-}
-
-void close_dir(void *stream)
-{
- closedir(stream);
-}
-
-int file_create(char *name, int ur, int uw, int ux, int gr,
- int gw, int gx, int or, int ow, int ox)
-{
- int mode, fd;
-
- mode = 0;
- mode |= ur ? S_IRUSR : 0;
- mode |= uw ? S_IWUSR : 0;
- mode |= ux ? S_IXUSR : 0;
- mode |= gr ? S_IRGRP : 0;
- mode |= gw ? S_IWGRP : 0;
- mode |= gx ? S_IXGRP : 0;
- mode |= or ? S_IROTH : 0;
- mode |= ow ? S_IWOTH : 0;
- mode |= ox ? S_IXOTH : 0;
- fd = open64(name, O_CREAT | O_RDWR, mode);
- if(fd < 0)
- return(-errno);
- return(fd);
-}
-
-int set_attr(const char *file, struct hostfs_iattr *attrs)
-{
- struct utimbuf buf;
- int err, ma;
-
- if(attrs->ia_valid & HOSTFS_ATTR_MODE){
- if(chmod(file, attrs->ia_mode) != 0) return(-errno);
- }
- if(attrs->ia_valid & HOSTFS_ATTR_UID){
- if(chown(file, attrs->ia_uid, -1)) return(-errno);
- }
- if(attrs->ia_valid & HOSTFS_ATTR_GID){
- if(chown(file, -1, attrs->ia_gid)) return(-errno);
- }
- if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
- if(truncate(file, attrs->ia_size)) return(-errno);
- }
- ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
- if((attrs->ia_valid & ma) == ma){
- buf.actime = attrs->ia_atime.tv_sec;
- buf.modtime = attrs->ia_mtime.tv_sec;
- if(utime(file, &buf) != 0) return(-errno);
- }
- else {
- struct timespec ts;
-
- if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
- err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, &ts, NULL, NULL, NULL);
- if(err != 0)
- return(err);
- buf.actime = attrs->ia_atime.tv_sec;
- buf.modtime = ts.tv_sec;
- if(utime(file, &buf) != 0)
- return(-errno);
- }
- if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
- err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
- NULL, &ts, NULL, NULL, NULL, NULL);
- if(err != 0)
- return(err);
- buf.actime = ts.tv_sec;
- buf.modtime = attrs->ia_mtime.tv_sec;
- if(utime(file, &buf) != 0)
- return(-errno);
- }
- }
- if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
- if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
- err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
- &attrs->ia_atime, &attrs->ia_mtime, NULL,
- NULL, NULL);
- if(err != 0) return(err);
- }
- return(0);
-}
-
-int make_symlink(const char *from, const char *to)
-{
- int err;
-
- err = symlink(to, from);
- if(err) return(-errno);
- return(0);
-}
-
-int unlink_file(const char *file)
-{
- int err;
-
- err = unlink(file);
- if(err) return(-errno);
- return(0);
-}
-
-int do_mkdir(const char *file, int mode)
-{
- int err;
-
- err = mkdir(file, mode);
- if(err) return(-errno);
- return(0);
-}
-
-int do_rmdir(const char *file)
-{
- int err;
-
- err = rmdir(file);
- if(err) return(-errno);
- return(0);
-}
-
-int do_mknod(const char *file, int mode, int dev)
-{
- int err;
-
- err = mknod(file, mode, dev);
- if(err) return(-errno);
- return(0);
-}
-
-int link_file(const char *to, const char *from)
-{
- int err;
-
- err = link(to, from);
- if(err) return(-errno);
- return(0);
-}
-
-int do_readlink(char *file, char *buf, int size)
-{
- int n;
-
- n = readlink(file, buf, size);
- if(n < 0)
- return(-errno);
- if(n < size)
- buf[n] = '\0';
- return(n);
-}
-
-int rename_file(char *from, char *to)
-{
- int err;
-
- err = rename(from, to);
- if(err < 0) return(-errno);
- return(0);
-}
-
-int do_statfs(char *root, long *bsize_out, long long *blocks_out,
- long long *bfree_out, long long *bavail_out,
- long long *files_out, long long *ffree_out,
- void *fsid_out, int fsid_size, long *namelen_out,
- long *spare_out)
-{
- struct statfs64 buf;
- int err;
-
- err = statfs64(root, &buf);
- if(err < 0) return(-errno);
- *bsize_out = buf.f_bsize;
- *blocks_out = buf.f_blocks;
- *bfree_out = buf.f_bfree;
- *bavail_out = buf.f_bavail;
- *files_out = buf.f_files;
- *ffree_out = buf.f_ffree;
- memcpy(fsid_out, &buf.f_fsid,
- sizeof(buf.f_fsid) > fsid_size ? fsid_size :
- sizeof(buf.f_fsid));
- *namelen_out = buf.f_namelen;
- spare_out[0] = buf.f_spare[0];
- spare_out[1] = buf.f_spare[1];
- spare_out[2] = buf.f_spare[2];
- spare_out[3] = buf.f_spare[3];
- spare_out[4] = buf.f_spare[4];
- spare_out[5] = buf.f_spare[5];
- return(0);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-#
-# Copyright (C) 2002, 2003 Jeff Dike (jdike@karaya.com)
-# Licensed under the GPL
-#
-
-hppfs-objs := hppfs_kern.o
-
-obj-y =
-obj-$(CONFIG_HPPFS) += hppfs.o
-
-clean:
-
-modules:
-
-fastdep:
-
-dep:
-
-archmrproper: clean
+++ /dev/null
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/kernel.h>
-#include <linux/ctype.h>
-#include <linux/dcache.h>
-#include <linux/statfs.h>
-#include <asm/uaccess.h>
-#include <asm/fcntl.h>
-#include "os.h"
-
-static int init_inode(struct inode *inode, struct dentry *dentry);
-
-struct hppfs_data {
- struct list_head list;
- char contents[PAGE_SIZE - sizeof(struct list_head)];
-};
-
-struct hppfs_private {
- struct file proc_file;
- int host_fd;
- loff_t len;
- struct hppfs_data *contents;
-};
-
-struct hppfs_inode_info {
- struct dentry *proc_dentry;
- struct inode vfs_inode;
-};
-
-static inline struct hppfs_inode_info *HPPFS_I(struct inode *inode)
-{
- return(list_entry(inode, struct hppfs_inode_info, vfs_inode));
-}
-
-#define HPPFS_SUPER_MAGIC 0xb00000ee
-
-static struct super_operations hppfs_sbops;
-
-static int is_pid(struct dentry *dentry)
-{
- struct super_block *sb;
- int i;
-
- sb = dentry->d_sb;
- if((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
- return(0);
-
- for(i = 0; i < dentry->d_name.len; i++){
- if(!isdigit(dentry->d_name.name[i]))
- return(0);
- }
- return(1);
-}
-
-static char *dentry_name(struct dentry *dentry, int extra)
-{
- struct dentry *parent;
- char *root, *name;
- const char *seg_name;
- int len, seg_len;
-
- len = 0;
- parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent))
- len += strlen("pid") + 1;
- else len += parent->d_name.len + 1;
- parent = parent->d_parent;
- }
-
- root = "proc";
- len += strlen(root);
- name = kmalloc(len + extra + 1, GFP_KERNEL);
- if(name == NULL) return(NULL);
-
- name[len] = '\0';
- parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent)){
- seg_name = "pid";
- seg_len = strlen("pid");
- }
- else {
- seg_name = parent->d_name.name;
- seg_len = parent->d_name.len;
- }
-
- len -= seg_len + 1;
- name[len] = '/';
- strncpy(&name[len + 1], seg_name, seg_len);
- parent = parent->d_parent;
- }
- strncpy(name, root, strlen(root));
- return(name);
-}
-
-struct dentry_operations hppfs_dentry_ops = {
-};
-
-static int file_removed(struct dentry *dentry, const char *file)
-{
- char *host_file;
- int extra, fd;
-
- extra = 0;
- if(file != NULL) extra += strlen(file) + 1;
-
- host_file = dentry_name(dentry, extra + strlen("/remove"));
- if(host_file == NULL){
- printk("file_removed : allocation failed\n");
- return(-ENOMEM);
- }
-
- if(file != NULL){
- strcat(host_file, "/");
- strcat(host_file, file);
- }
- strcat(host_file, "/remove");
-
- fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
- kfree(host_file);
- if(fd > 0){
- os_close_file(fd);
- return(1);
- }
- return(0);
-}
-
-static void hppfs_read_inode(struct inode *ino)
-{
- struct inode *proc_ino;
-
- if(HPPFS_I(ino)->proc_dentry == NULL)
- return;
-
- proc_ino = HPPFS_I(ino)->proc_dentry->d_inode;
- ino->i_uid = proc_ino->i_uid;
- ino->i_gid = proc_ino->i_gid;
- ino->i_atime = proc_ino->i_atime;
- ino->i_mtime = proc_ino->i_mtime;
- ino->i_ctime = proc_ino->i_ctime;
- ino->i_ino = proc_ino->i_ino;
- ino->i_mode = proc_ino->i_mode;
- ino->i_nlink = proc_ino->i_nlink;
- ino->i_size = proc_ino->i_size;
- ino->i_blksize = proc_ino->i_blksize;
- ino->i_blocks = proc_ino->i_blocks;
-}
-
-static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
- struct nameidata *nd)
-{
- struct dentry *proc_dentry, *new, *parent;
- struct inode *inode;
- int err, deleted;
-
- deleted = file_removed(dentry, NULL);
- if(deleted < 0)
- return(ERR_PTR(deleted));
- else if(deleted)
- return(ERR_PTR(-ENOENT));
-
- err = -ENOMEM;
- parent = HPPFS_I(ino)->proc_dentry;
- down(&parent->d_inode->i_sem);
- proc_dentry = d_lookup(parent, &dentry->d_name);
- if(proc_dentry == NULL){
- proc_dentry = d_alloc(parent, &dentry->d_name);
- if(proc_dentry == NULL){
- up(&parent->d_inode->i_sem);
- goto out;
- }
- new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
- proc_dentry, NULL);
- if(new){
- dput(proc_dentry);
- proc_dentry = new;
- }
- }
- up(&parent->d_inode->i_sem);
-
- if(IS_ERR(proc_dentry))
- return(proc_dentry);
-
- inode = iget(ino->i_sb, 0);
- if(inode == NULL)
- goto out_dput;
-
- err = init_inode(inode, proc_dentry);
- if(err)
- goto out_put;
-
- hppfs_read_inode(inode);
-
- d_add(dentry, inode);
- dentry->d_op = &hppfs_dentry_ops;
- return(NULL);
-
- out_put:
- iput(inode);
- out_dput:
- dput(proc_dentry);
- out:
- return(ERR_PTR(err));
-}
-
-static struct inode_operations hppfs_file_iops = {
-};
-
-static ssize_t read_proc(struct file *file, char *buf, ssize_t count,
- loff_t *ppos, int is_user)
-{
- ssize_t (*read)(struct file *, char *, size_t, loff_t *);
- ssize_t n;
-
- read = file->f_dentry->d_inode->i_fop->read;
-
- if(!is_user)
- set_fs(KERNEL_DS);
-
- n = (*read)(file, buf, count, &file->f_pos);
-
- if(!is_user)
- set_fs(USER_DS);
-
- if(ppos) *ppos = file->f_pos;
- return(n);
-}
-
-static ssize_t hppfs_read_file(int fd, char *buf, ssize_t count)
-{
- ssize_t n;
- int cur, err;
- char *new_buf;
-
- n = -ENOMEM;
- new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if(new_buf == NULL){
- printk("hppfs_read_file : kmalloc failed\n");
- goto out;
- }
- n = 0;
- while(count > 0){
- cur = min_t(ssize_t, count, PAGE_SIZE);
- err = os_read_file(fd, new_buf, cur);
- if(err < 0){
- printk("hppfs_read : read failed, errno = %d\n",
- count);
- n = err;
- goto out_free;
- }
- else if(err == 0)
- break;
-
- if(copy_to_user(buf, new_buf, err)){
- n = -EFAULT;
- goto out_free;
- }
- n += err;
- count -= err;
- }
- out_free:
- kfree(new_buf);
- out:
- return(n);
-}
-
-static ssize_t hppfs_read(struct file *file, char *buf, size_t count,
- loff_t *ppos)
-{
- struct hppfs_private *hppfs = file->private_data;
- struct hppfs_data *data;
- loff_t off;
- int err;
-
- if(hppfs->contents != NULL){
- if(*ppos >= hppfs->len) return(0);
-
- data = hppfs->contents;
- off = *ppos;
- while(off >= sizeof(data->contents)){
- data = list_entry(data->list.next, struct hppfs_data,
- list);
- off -= sizeof(data->contents);
- }
-
- if(off + count > hppfs->len)
- count = hppfs->len - off;
- copy_to_user(buf, &data->contents[off], count);
- *ppos += count;
- }
- else if(hppfs->host_fd != -1){
- err = os_seek_file(hppfs->host_fd, *ppos);
- if(err){
- printk("hppfs_read : seek failed, errno = %d\n", err);
- return(err);
- }
- count = hppfs_read_file(hppfs->host_fd, buf, count);
- if(count > 0)
- *ppos += count;
- }
- else count = read_proc(&hppfs->proc_file, buf, count, ppos, 1);
-
- return(count);
-}
-
-static ssize_t hppfs_write(struct file *file, const char *buf, size_t len,
- loff_t *ppos)
-{
- struct hppfs_private *data = file->private_data;
- struct file *proc_file = &data->proc_file;
- ssize_t (*write)(struct file *, const char *, size_t, loff_t *);
- int err;
-
- write = proc_file->f_dentry->d_inode->i_fop->write;
-
- proc_file->f_pos = file->f_pos;
- err = (*write)(proc_file, buf, len, &proc_file->f_pos);
- file->f_pos = proc_file->f_pos;
-
- return(err);
-}
-
-static int open_host_sock(char *host_file, int *filter_out)
-{
- char *end;
- int fd;
-
- end = &host_file[strlen(host_file)];
- strcpy(end, "/rw");
- *filter_out = 1;
- fd = os_connect_socket(host_file);
- if(fd > 0)
- return(fd);
-
- strcpy(end, "/r");
- *filter_out = 0;
- fd = os_connect_socket(host_file);
- return(fd);
-}
-
-static void free_contents(struct hppfs_data *head)
-{
- struct hppfs_data *data;
- struct list_head *ele, *next;
-
- if(head == NULL) return;
-
- list_for_each_safe(ele, next, &head->list){
- data = list_entry(ele, struct hppfs_data, list);
- kfree(data);
- }
- kfree(head);
-}
-
-static struct hppfs_data *hppfs_get_data(int fd, int filter,
- struct file *proc_file,
- struct file *hppfs_file,
- loff_t *size_out)
-{
- struct hppfs_data *data, *new, *head;
- int n, err;
-
- err = -ENOMEM;
- data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL){
- printk("hppfs_get_data : head allocation failed\n");
- goto failed;
- }
-
- INIT_LIST_HEAD(&data->list);
-
- head = data;
- *size_out = 0;
-
- if(filter){
- while((n = read_proc(proc_file, data->contents,
- sizeof(data->contents), NULL, 0)) > 0)
- os_write_file(fd, data->contents, n);
- err = os_shutdown_socket(fd, 0, 1);
- if(err){
- printk("hppfs_get_data : failed to shut down "
- "socket\n");
- goto failed_free;
- }
- }
- while(1){
- n = os_read_file(fd, data->contents, sizeof(data->contents));
- if(n < 0){
- err = n;
- printk("hppfs_get_data : read failed, errno = %d\n",
- err);
- goto failed_free;
- }
- else if(n == 0)
- break;
-
- *size_out += n;
-
- if(n < sizeof(data->contents))
- break;
-
- new = kmalloc(sizeof(*data), GFP_KERNEL);
- if(new == 0){
- printk("hppfs_get_data : data allocation failed\n");
- err = -ENOMEM;
- goto failed_free;
- }
-
- INIT_LIST_HEAD(&new->list);
- list_add(&new->list, &data->list);
- data = new;
- }
- return(head);
-
- failed_free:
- free_contents(head);
- failed:
- return(ERR_PTR(err));
-}
-
-static struct hppfs_private *hppfs_data(void)
-{
- struct hppfs_private *data;
-
- data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL)
- return(data);
-
- *data = ((struct hppfs_private ) { .host_fd = -1,
- .len = -1,
- .contents = NULL } );
- return(data);
-}
-
-static int file_mode(int fmode)
-{
- if(fmode == (FMODE_READ | FMODE_WRITE))
- return(O_RDWR);
- if(fmode == FMODE_READ)
- return(O_RDONLY);
- if(fmode == FMODE_WRITE)
- return(O_WRONLY);
- return(0);
-}
-
-static int hppfs_open(struct inode *inode, struct file *file)
-{
- struct hppfs_private *data;
- struct dentry *proc_dentry;
- char *host_file;
- int err, fd, type, filter;
-
- err = -ENOMEM;
- data = hppfs_data();
- if(data == NULL)
- goto out;
-
- host_file = dentry_name(file->f_dentry, strlen("/rw"));
- if(host_file == NULL)
- goto out_free2;
-
- proc_dentry = HPPFS_I(inode)->proc_dentry;
-
- /* XXX This isn't closed anywhere */
- err = open_private_file(&data->proc_file, proc_dentry,
- file_mode(file->f_mode));
- if(err)
- goto out_free1;
-
- type = os_file_type(host_file);
- if(type == OS_TYPE_FILE){
- fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
- if(fd >= 0)
- data->host_fd = fd;
- else printk("hppfs_open : failed to open '%s', errno = %d\n",
- host_file, -fd);
-
- data->contents = NULL;
- }
- else if(type == OS_TYPE_DIR){
- fd = open_host_sock(host_file, &filter);
- if(fd > 0){
- data->contents = hppfs_get_data(fd, filter,
- &data->proc_file,
- file, &data->len);
- if(!IS_ERR(data->contents))
- data->host_fd = fd;
- }
- else printk("hppfs_open : failed to open a socket in "
- "'%s', errno = %d\n", host_file, -fd);
- }
- kfree(host_file);
-
- file->private_data = data;
- return(0);
-
- out_free1:
- kfree(host_file);
- out_free2:
- free_contents(data->contents);
- kfree(data);
- out:
- return(err);
-}
-
-static int hppfs_dir_open(struct inode *inode, struct file *file)
-{
- struct hppfs_private *data;
- struct dentry *proc_dentry;
- int err;
-
- err = -ENOMEM;
- data = hppfs_data();
- if(data == NULL)
- goto out;
-
- proc_dentry = HPPFS_I(inode)->proc_dentry;
- err = open_private_file(&data->proc_file, proc_dentry,
- file_mode(file->f_mode));
- if(err)
- goto out_free;
-
- file->private_data = data;
- return(0);
-
- out_free:
- kfree(data);
- out:
- return(err);
-}
-
-static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
-{
- struct hppfs_private *data = file->private_data;
- struct file *proc_file = &data->proc_file;
- loff_t (*llseek)(struct file *, loff_t, int);
- loff_t ret;
-
- llseek = proc_file->f_dentry->d_inode->i_fop->llseek;
- if(llseek != NULL){
- ret = (*llseek)(proc_file, off, where);
- if(ret < 0)
- return(ret);
- }
-
- return(default_llseek(file, off, where));
-}
-
-static struct file_operations hppfs_file_fops = {
- .owner = NULL,
- .llseek = hppfs_llseek,
- .read = hppfs_read,
- .write = hppfs_write,
- .open = hppfs_open,
-};
-
-struct hppfs_dirent {
- void *vfs_dirent;
- filldir_t filldir;
- struct dentry *dentry;
-};
-
-static int hppfs_filldir(void *d, const char *name, int size,
- loff_t offset, ino_t inode, unsigned int type)
-{
- struct hppfs_dirent *dirent = d;
-
- if(file_removed(dirent->dentry, name))
- return(0);
-
- return((*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
- inode, type));
-}
-
-static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
-{
- struct hppfs_private *data = file->private_data;
- struct file *proc_file = &data->proc_file;
- int (*readdir)(struct file *, void *, filldir_t);
- struct hppfs_dirent dirent = ((struct hppfs_dirent)
- { .vfs_dirent = ent,
- .filldir = filldir,
- .dentry = file->f_dentry } );
- int err;
-
- readdir = proc_file->f_dentry->d_inode->i_fop->readdir;
-
- proc_file->f_pos = file->f_pos;
- err = (*readdir)(proc_file, &dirent, hppfs_filldir);
- file->f_pos = proc_file->f_pos;
-
- return(err);
-}
-
-static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
-{
- return(0);
-}
-
-static struct file_operations hppfs_dir_fops = {
- .owner = NULL,
- .readdir = hppfs_readdir,
- .open = hppfs_dir_open,
- .fsync = hppfs_fsync,
-};
-
-static int hppfs_statfs(struct super_block *sb, struct kstatfs *sf)
-{
- sf->f_blocks = 0;
- sf->f_bfree = 0;
- sf->f_bavail = 0;
- sf->f_files = 0;
- sf->f_ffree = 0;
- sf->f_type = HPPFS_SUPER_MAGIC;
- return(0);
-}
-
-static struct inode *hppfs_alloc_inode(struct super_block *sb)
-{
- struct hppfs_inode_info *hi;
-
- hi = kmalloc(sizeof(*hi), GFP_KERNEL);
- if(hi == NULL)
- return(NULL);
-
- *hi = ((struct hppfs_inode_info) { .proc_dentry = NULL });
- inode_init_once(&hi->vfs_inode);
- return(&hi->vfs_inode);
-}
-
-void hppfs_delete_inode(struct inode *ino)
-{
- clear_inode(ino);
-}
-
-static void hppfs_destroy_inode(struct inode *inode)
-{
- kfree(HPPFS_I(inode));
-}
-
-static struct super_operations hppfs_sbops = {
- .alloc_inode = hppfs_alloc_inode,
- .destroy_inode = hppfs_destroy_inode,
- .read_inode = hppfs_read_inode,
- .delete_inode = hppfs_delete_inode,
- .statfs = hppfs_statfs,
-};
-
-static int hppfs_readlink(struct dentry *dentry, char *buffer, int buflen)
-{
- struct file proc_file;
- struct dentry *proc_dentry;
- int (*readlink)(struct dentry *, char *, int);
- int err, n;
-
- proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- err = open_private_file(&proc_file, proc_dentry, O_RDONLY);
- if(err)
- return(err);
-
- readlink = proc_dentry->d_inode->i_op->readlink;
- n = (*readlink)(proc_dentry, buffer, buflen);
-
- close_private_file(&proc_file);
-
- return(n);
-}
-
-static int hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- struct file proc_file;
- struct dentry *proc_dentry;
- int (*follow_link)(struct dentry *, struct nameidata *);
- int err, n;
-
- proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- err = open_private_file(&proc_file, proc_dentry, O_RDONLY);
- if(err)
- return(err);
-
- follow_link = proc_dentry->d_inode->i_op->follow_link;
- n = (*follow_link)(proc_dentry, nd);
-
- close_private_file(&proc_file);
-
- return(n);
-}
-
-static struct inode_operations hppfs_dir_iops = {
- .lookup = hppfs_lookup,
-};
-
-static struct inode_operations hppfs_link_iops = {
- .readlink = hppfs_readlink,
- .follow_link = hppfs_follow_link,
-};
-
-static int init_inode(struct inode *inode, struct dentry *dentry)
-{
- if(S_ISDIR(dentry->d_inode->i_mode)){
- inode->i_op = &hppfs_dir_iops;
- inode->i_fop = &hppfs_dir_fops;
- }
- else if(S_ISLNK(dentry->d_inode->i_mode)){
- inode->i_op = &hppfs_link_iops;
- inode->i_fop = &hppfs_file_fops;
- }
- else {
- inode->i_op = &hppfs_file_iops;
- inode->i_fop = &hppfs_file_fops;
- }
-
- HPPFS_I(inode)->proc_dentry = dentry;
-
- return(0);
-}
-
-static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
-{
- struct inode *root_inode;
- struct file_system_type *procfs;
- struct super_block *proc_sb;
- int err;
-
- err = -ENOENT;
- procfs = get_fs_type("proc");
- if(procfs == NULL)
- goto out;
-
- if(list_empty(&procfs->fs_supers))
- goto out;
-
- proc_sb = list_entry(procfs->fs_supers.next, struct super_block,
- s_instances);
-
- sb->s_blocksize = 1024;
- sb->s_blocksize_bits = 10;
- sb->s_magic = HPPFS_SUPER_MAGIC;
- sb->s_op = &hppfs_sbops;
-
- root_inode = iget(sb, 0);
- if(root_inode == NULL)
- goto out;
-
- err = init_inode(root_inode, proc_sb->s_root);
- if(err)
- goto out_put;
-
- err = -ENOMEM;
- sb->s_root = d_alloc_root(root_inode);
- if(sb->s_root == NULL)
- goto out_put;
-
- hppfs_read_inode(root_inode);
-
- return(0);
-
- out_put:
- iput(root_inode);
- out:
- return(err);
-}
-
-static struct super_block *hppfs_read_super(struct file_system_type *type,
- int flags, const char *dev_name,
- void *data)
-{
- return(get_sb_nodev(type, flags, data, hppfs_fill_super));
-}
-
-static struct file_system_type hppfs_type = {
- .owner = THIS_MODULE,
- .name = "hppfs",
- .get_sb = hppfs_read_super,
- .kill_sb = kill_anon_super,
- .fs_flags = 0,
-};
-
-static int __init init_hppfs(void)
-{
- return(register_filesystem(&hppfs_type));
-}
-
-static void __exit exit_hppfs(void)
-{
- unregister_filesystem(&hppfs_type);
-}
-
-module_init(init_hppfs)
-module_exit(exit_hppfs)
-MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+++ /dev/null
-#
-# Makefile for rcfs routines.
-#
-
-obj-$(CONFIG_RCFS_FS) += rcfs.o
-
-rcfs-objs := super.o inode.o dir.o rootdir.o magic.o tc_magic.o socket_fs.o
-
-rcfs-objs-$(CONFIG_CKRM_TYPE_TASKCLASS) += tc_magic.o
-rcfs-objs-$(CONFIG_CKRM_TYPE_SOCKETCLASS) += socket_fs.o
+++ /dev/null
-/*
- * fs/rcfs/dir.c
- *
- * Copyright (C) Shailabh Nagar, IBM Corp. 2004
- * Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Directory operations for rcfs
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 08 Mar 2004
- * Created.
- */
-
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/namei.h>
-#include <asm/namei.h>
-#include <linux/namespace.h>
-#include <linux/dcache.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/backing-dev.h>
-#include <linux/parser.h>
-
-#include <asm/uaccess.h>
-
-#include <linux/rcfs.h>
-
-
-
-#define rcfs_positive(dentry) ((dentry)->d_inode && !d_unhashed((dentry)))
-
-int rcfs_empty(struct dentry *dentry)
-{
- struct dentry *child;
- int ret = 0;
-
- spin_lock(&dcache_lock);
- list_for_each_entry(child, &dentry->d_subdirs, d_child)
- if (!rcfs_is_magic(child) && rcfs_positive(child))
- goto out;
- ret = 1;
-out:
- spin_unlock(&dcache_lock);
- return ret;
-}
-
-
-
-
-/* Directory inode operations */
-
-
-int
-rcfs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
-{
- return rcfs_mknod(dir, dentry, mode | S_IFREG, 0);
-}
-EXPORT_SYMBOL(rcfs_create);
-
-
-/* Symlinks permitted ?? */
-int
-rcfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
-{
- struct inode *inode;
- int error = -ENOSPC;
-
- inode = rcfs_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0);
- if (inode) {
- int l = strlen(symname)+1;
- error = page_symlink(inode, symname, l);
- if (!error) {
- if (dir->i_mode & S_ISGID)
- inode->i_gid = dir->i_gid;
- d_instantiate(dentry, inode);
- dget(dentry);
- } else
- iput(inode);
- }
- return error;
-}
-EXPORT_SYMBOL(rcfs_symlink);
-
-int
-rcfs_create_coredir(struct inode *dir, struct dentry *dentry)
-{
-
- struct rcfs_inode_info *ripar, *ridir;
- int sz;
-
- ripar = RCFS_I(dir);
- ridir = RCFS_I(dentry->d_inode);
-
- // Inform RC's - do Core operations
- if (ckrm_is_core_valid(ripar->core)) {
- sz = strlen(ripar->name) + strlen(dentry->d_name.name) + 2 ;
- ridir->name = kmalloc(sz, GFP_KERNEL);
- if (!ridir->name) {
- return -ENOMEM;
- }
- snprintf(ridir->name, sz,"%s/%s", ripar->name,
- dentry->d_name.name);
- ridir->core = (*(ripar->core->classtype->alloc))
- (ripar->core,ridir->name);
- }
- else {
- printk(KERN_ERR "rcfs_mkdir: Invalid parent core %p\n",
- ripar->core);
- return -EINVAL;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(rcfs_create_coredir);
-
-
-int
-rcfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
-
- int retval = 0;
- ckrm_classtype_t *clstype;
-
-#if 0
- struct dentry *pd = list_entry(dir->i_dentry.next, struct dentry,
- d_alias);
- if ((!strcmp(pd->d_name.name, "/") &&
- !strcmp(dentry->d_name.name, "ce"))) {
- // Call CE's mkdir if it has registered, else fail.
- if (rcfs_eng_callbacks.mkdir) {
- return (*rcfs_eng_callbacks.mkdir)(dir, dentry, mode);
- } else {
- return -EINVAL;
- }
- }
-#endif
-
- if (_rcfs_mknod(dir, dentry, mode | S_IFDIR, 0)) {
- printk(KERN_ERR "rcfs_mkdir: error in _rcfs_mknod\n");
- return retval;
- }
-
- dir->i_nlink++;
-
- // Inherit parent's ops since _rcfs_mknod assigns noperm ops
- dentry->d_inode->i_op = dir->i_op;
- dentry->d_inode->i_fop = dir->i_fop;
-
-
- retval = rcfs_create_coredir(dir, dentry);
- if (retval) {
- simple_rmdir(dir,dentry);
- return retval;
- // goto mkdir_err;
- }
-
- // create the default set of magic files
- clstype = (RCFS_I(dentry->d_inode))->core->classtype;
- rcfs_create_magic(dentry, &(((struct rcfs_magf*)clstype->mfdesc)[1]),
- clstype->mfcount-1);
-
- return retval;
-
-//mkdir_err:
- dir->i_nlink--;
- return retval;
-}
-EXPORT_SYMBOL(rcfs_mkdir);
-
-
-int
-rcfs_rmdir(struct inode * dir, struct dentry * dentry)
-{
- struct rcfs_inode_info *ri = RCFS_I(dentry->d_inode);
-
-#if 0
- struct dentry *pd = list_entry(dir->i_dentry.next,
- struct dentry, d_alias);
- if ((!strcmp(pd->d_name.name, "/") &&
- !strcmp(dentry->d_name.name, "ce"))) {
- // Call CE's mkdir if it has registered, else fail.
- if (rcfs_eng_callbacks.rmdir) {
- return (*rcfs_eng_callbacks.rmdir)(dir, dentry);
- } else {
- return simple_rmdir(dir, dentry);
- }
- }
- else if ((!strcmp(pd->d_name.name, "/") &&
- !strcmp(dentry->d_name.name, "network"))) {
- return -EPERM;
- }
-#endif
-
- if (!rcfs_empty(dentry)) {
- printk(KERN_ERR "rcfs_rmdir: directory not empty\n");
- goto out;
- }
-
- // Core class removal
-
- if (ri->core == NULL) {
- printk(KERN_ERR "rcfs_rmdir: core==NULL\n");
- // likely a race condition
- return 0;
- }
-
- if ((*(ri->core->classtype->free))(ri->core)) {
- printk(KERN_ERR "rcfs_rmdir: ckrm_free_core_class failed\n");
- goto out;
- }
- ri->core = NULL ; // just to be safe
-
- // Clear magic files only after core successfully removed
- rcfs_clear_magic(dentry);
-
- return simple_rmdir(dir, dentry);
-
-out:
- return -EBUSY;
-}
-EXPORT_SYMBOL(rcfs_rmdir);
-
-
-int
-rcfs_unlink(struct inode *dir, struct dentry *dentry)
-{
- // -ENOENT and not -ENOPERM to allow rm -rf to work despite
- // magic files being present
- return -ENOENT;
-}
-EXPORT_SYMBOL(rcfs_unlink);
-
-// rename is allowed on directories only
-int
-rcfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- if (S_ISDIR(old_dentry->d_inode->i_mode))
- return simple_rename(old_dir, old_dentry, new_dir, new_dentry);
- else
- return -EINVAL;
-}
-EXPORT_SYMBOL(rcfs_rename);
-
-
-struct inode_operations rcfs_dir_inode_operations = {
- .create = rcfs_create,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = rcfs_unlink,
- .symlink = rcfs_symlink,
- .mkdir = rcfs_mkdir,
- .rmdir = rcfs_rmdir,
- .mknod = rcfs_mknod,
- .rename = rcfs_rename,
-};
-
-
-
-
-
-int
-rcfs_root_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
-{
- return -EPERM;
-}
-
-
-int
-rcfs_root_symlink(struct inode * dir, struct dentry *dentry,
- const char * symname)
-{
- return -EPERM;
-}
-
-int
-rcfs_root_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
- return -EPERM;
-}
-
-int
-rcfs_root_rmdir(struct inode * dir, struct dentry * dentry)
-{
- return -EPERM;
-}
-
-int
-rcfs_root_unlink(struct inode *dir, struct dentry *dentry)
-{
- return -EPERM;
-}
-
-int
-rcfs_root_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-{
- return -EPERM;
-}
-
-int
-rcfs_root_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- return -EPERM;
-}
-
-struct inode_operations rcfs_rootdir_inode_operations = {
- .create = rcfs_root_create,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = rcfs_root_unlink,
- .symlink = rcfs_root_symlink,
- .mkdir = rcfs_root_mkdir,
- .rmdir = rcfs_root_rmdir,
- .mknod = rcfs_root_mknod,
- .rename = rcfs_root_rename,
-};
+++ /dev/null
-/*
- * fs/rcfs/inode.c
- *
- * Copyright (C) Shailabh Nagar, IBM Corp. 2004
- * Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Resource class filesystem (rcfs) forming the
- * user interface to Class-based Kernel Resource Management (CKRM).
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 05 Mar 2004
- * Created.
- * 06 Mar 2004
- * Parsing for shares added
- */
-
-
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/fs.h>
-#include <linux/namei.h>
-#include <asm/namei.h>
-#include <linux/namespace.h>
-#include <linux/dcache.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/backing-dev.h>
-#include <linux/parser.h>
-#include <asm/uaccess.h>
-
-#include <linux/rcfs.h>
-
-
-
-// Address of variable used as flag to indicate a magic file,
-// ; value unimportant
-int RCFS_IS_MAGIC;
-
-
-struct inode *rcfs_get_inode(struct super_block *sb, int mode, dev_t dev)
-{
- struct inode * inode = new_inode(sb);
-
- if (inode) {
- inode->i_mode = mode;
- inode->i_uid = current->fsuid;
- inode->i_gid = current->fsgid;
- inode->i_blksize = PAGE_CACHE_SIZE;
- inode->i_blocks = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- switch (mode & S_IFMT) {
- default:
- init_special_inode(inode, mode, dev);
- break;
- case S_IFREG:
- // Treat as default assignment */
- inode->i_op = &rcfs_file_inode_operations;
- // inode->i_fop = &rcfs_file_operations;
- break;
- case S_IFDIR:
- // inode->i_op = &rcfs_dir_inode_operations;
- inode->i_op = &rcfs_rootdir_inode_operations;
- inode->i_fop = &simple_dir_operations;
-
- // directory inodes start off with i_nlink == 2
- // (for "." entry)
-
- inode->i_nlink++;
- break;
- case S_IFLNK:
- inode->i_op = &page_symlink_inode_operations;
- break;
- }
- }
- return inode;
-}
-
-
-
-int
-_rcfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-{
- struct inode *inode;
- int error = -EPERM;
-
- if (dentry->d_inode)
- return -EEXIST;
-
- inode = rcfs_get_inode(dir->i_sb, mode, dev);
- if (inode) {
- if (dir->i_mode & S_ISGID) {
- inode->i_gid = dir->i_gid;
- if (S_ISDIR(mode))
- inode->i_mode |= S_ISGID;
- }
- d_instantiate(dentry, inode);
- dget(dentry);
- error = 0;
- }
-
- return error;
-}
-EXPORT_SYMBOL(_rcfs_mknod);
-
-
-int
-rcfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-{
- // User can only create directories, not files
- if ((mode & S_IFMT) != S_IFDIR)
- return -EINVAL;
-
- return dir->i_op->mkdir(dir, dentry, mode);
-}
-EXPORT_SYMBOL(rcfs_mknod);
-
-
-struct dentry *
-rcfs_create_internal(struct dentry *parent, struct rcfs_magf *magf, int magic)
-{
- struct qstr qstr;
- struct dentry *mfdentry ;
-
- // Get new dentry for name
- qstr.name = magf->name;
- qstr.len = strlen(magf->name);
- qstr.hash = full_name_hash(magf->name,qstr.len);
- mfdentry = lookup_hash(&qstr,parent);
-
- if (!IS_ERR(mfdentry)) {
- int err;
-
- down(&parent->d_inode->i_sem);
- if (magic && (magf->mode & S_IFDIR))
- err = parent->d_inode->i_op->mkdir(parent->d_inode,
- mfdentry, magf->mode);
- else {
- err =_rcfs_mknod(parent->d_inode,mfdentry,
- magf->mode,0);
- // _rcfs_mknod doesn't increment parent's link count,
- // i_op->mkdir does.
- parent->d_inode->i_nlink++;
- }
- up(&parent->d_inode->i_sem);
-
- if (err) {
- dput(mfdentry);
- return mfdentry;
- }
- }
- return mfdentry ;
-}
-EXPORT_SYMBOL(rcfs_create_internal);
-
-int
-rcfs_delete_internal(struct dentry *mfdentry)
-{
- struct dentry *parent ;
-
- if (!mfdentry || !mfdentry->d_parent)
- return -EINVAL;
-
- parent = mfdentry->d_parent;
-
- if (!mfdentry->d_inode) {
- return 0;
- }
- down(&mfdentry->d_inode->i_sem);
- if (S_ISDIR(mfdentry->d_inode->i_mode))
- simple_rmdir(parent->d_inode, mfdentry);
- else
- simple_unlink(parent->d_inode, mfdentry);
- up(&mfdentry->d_inode->i_sem);
-
- d_delete(mfdentry);
-
- return 0;
-}
-EXPORT_SYMBOL(rcfs_delete_internal);
-
-struct inode_operations rcfs_file_inode_operations = {
- .getattr = simple_getattr,
-};
-
-
-
-
-
-
+++ /dev/null
-/*
- * fs/rcfs/magic.c
- *
- * Copyright (C) Shailabh Nagar, IBM Corp. 2004
- * (C) Vivek Kashyap, IBM Corp. 2004
- * (C) Chandra Seetharaman, IBM Corp. 2004
- * (C) Hubertus Franke, IBM Corp. 2004
- *
- * File operations for common magic files in rcfs,
- * the user interface for CKRM.
- *
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 23 Apr 2004
- * Created from code kept earlier in fs/rcfs/magic_*.c
- *
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/namei.h>
-#include <asm/namei.h>
-#include <linux/namespace.h>
-#include <linux/dcache.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/parser.h>
-#include <asm/uaccess.h>
-
-#include <linux/rcfs.h>
-
-
-
-
-/******************************************************
- * Macros
- *
- * generic macros to assist in writing magic fileops
- *
- *****************************************************/
-
-
-#define MAGIC_SHOW(FUNC) \
-static int \
-FUNC ## _show(struct seq_file *s, void *v) \
-{ \
- int rc=0; \
- ckrm_core_class_t *core ; \
- \
- core = (ckrm_core_class_t *) \
- (((struct rcfs_inode_info *)s->private)->core); \
- \
- if (!ckrm_is_core_valid(core)) { \
- return -EINVAL; \
- } \
- \
- if (core->classtype->show_ ## FUNC) \
- rc = (* core->classtype->show_ ## FUNC)(core, s); \
- \
- return rc; \
-};
-
-
-#define MAGIC_OPEN(FUNC) \
-static int \
-FUNC ## _open(struct inode *inode, struct file *file) \
-{ \
- struct rcfs_inode_info *ri; \
- int ret=-EINVAL; \
- \
- if (file->f_dentry && file->f_dentry->d_parent) { \
- \
- ri = RCFS_I(file->f_dentry->d_parent->d_inode); \
- ret = single_open(file,FUNC ## _show, (void *)ri); \
- } \
- return ret; \
-}
-
-#define MAGIC_CLOSE(FUNC) \
-static int \
-FUNC ## _close(struct inode *inode, struct file *file) \
-{ \
- return single_release(inode,file); \
-}
-
-
-
-#define MAGIC_PARSE(FUNC) \
-static int \
-FUNC ## _parse(char *options, char **resstr, char **otherstr) \
-{ \
- char *p; \
- \
- if (!options) \
- return 1; \
- \
- while ((p = strsep(&options, ",")) != NULL) { \
- substring_t args[MAX_OPT_ARGS]; \
- int token; \
- \
- if (!*p) \
- continue; \
- \
- token = match_token(p, FUNC##_tokens, args); \
- switch (token) { \
- case FUNC ## _res_type: \
- *resstr = match_strdup(args); \
- break; \
- case FUNC ## _str: \
- *otherstr = match_strdup(args); \
- break; \
- default: \
- return 0; \
- } \
- } \
- return 1; \
-}
-
-#define MAGIC_WRITE(FUNC,CLSTYPEFUN) \
-static ssize_t \
-FUNC ## _write(struct file *file, const char __user *buf, \
- size_t count, loff_t *ppos) \
-{ \
- struct rcfs_inode_info *ri = \
- RCFS_I(file->f_dentry->d_parent->d_inode); \
- char *optbuf, *otherstr=NULL, *resname=NULL; \
- int done, rc = 0; \
- ckrm_core_class_t *core ; \
- \
- core = ri->core; \
- if (!ckrm_is_core_valid(core)) \
- return -EINVAL; \
- \
- if ((ssize_t) count < 0 \
- || (ssize_t) count > FUNC ## _max_input_size) \
- return -EINVAL; \
- \
- if (!access_ok(VERIFY_READ, buf, count)) \
- return -EFAULT; \
- \
- down(&(ri->vfs_inode.i_sem)); \
- \
- optbuf = kmalloc(FUNC ## _max_input_size, GFP_KERNEL); \
- __copy_from_user(optbuf, buf, count); \
- if (optbuf[count-1] == '\n') \
- optbuf[count-1]='\0'; \
- \
- done = FUNC ## _parse(optbuf, &resname, &otherstr); \
- \
- if (!done) { \
- printk(KERN_ERR "Error parsing FUNC \n"); \
- goto FUNC ## _write_out; \
- } \
- \
- if (core->classtype-> CLSTYPEFUN) { \
- rc = (*core->classtype->CLSTYPEFUN) \
- (core, resname, otherstr); \
- if (rc) { \
- printk(KERN_ERR "FUNC_write: CLSTYPEFUN error\n"); \
- goto FUNC ## _write_out; \
- } \
- } \
- \
-FUNC ## _write_out: \
- up(&(ri->vfs_inode.i_sem)); \
- kfree(optbuf); \
- kfree(otherstr); \
- kfree(resname); \
- return rc ? rc : count; \
-}
-
-
-#define MAGIC_RD_FILEOPS(FUNC) \
-struct file_operations FUNC ## _fileops = { \
- .open = FUNC ## _open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = FUNC ## _close, \
-}; \
-EXPORT_SYMBOL(FUNC ## _fileops);
-
-
-#define MAGIC_RDWR_FILEOPS(FUNC) \
-struct file_operations FUNC ## _fileops = { \
- .open = FUNC ## _open, \
- .read = seq_read, \
- .llseek = seq_lseek, \
- .release = FUNC ## _close, \
- .write = FUNC ## _write, \
-}; \
-EXPORT_SYMBOL(FUNC ## _fileops);
-
-
-/********************************************************************************
- * Target
- *
- * pseudo file for manually reclassifying members to a class
- *
- *******************************************************************************/
-
-#define TARGET_MAX_INPUT_SIZE 100
-
-static ssize_t
-target_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct rcfs_inode_info *ri= RCFS_I(file->f_dentry->d_inode);
- char *optbuf;
- int rc = -EINVAL;
- ckrm_classtype_t *clstype;
-
-
- if ((ssize_t) count < 0 || (ssize_t) count > TARGET_MAX_INPUT_SIZE)
- return -EINVAL;
-
- if (!access_ok(VERIFY_READ, buf, count))
- return -EFAULT;
-
- down(&(ri->vfs_inode.i_sem));
-
- optbuf = kmalloc(TARGET_MAX_INPUT_SIZE, GFP_KERNEL);
- __copy_from_user(optbuf, buf, count);
- if (optbuf[count-1] == '\n')
- optbuf[count-1]='\0';
-
- clstype = ri->core->classtype;
- if (clstype->forced_reclassify)
- rc = (* clstype->forced_reclassify)(ri->core,optbuf);
-
- up(&(ri->vfs_inode.i_sem));
- kfree(optbuf);
- return !rc ? count : rc;
-
-}
-
-struct file_operations target_fileops = {
- .write = target_write,
-};
-EXPORT_SYMBOL(target_fileops);
-
-
-
-/********************************************************************************
- * Config
- *
- * Set/get configuration parameters of a class.
- *
- *******************************************************************************/
-
-/* Currently there are no per-class config parameters defined.
- * Use existing code as a template
- */
-
-#define config_max_input_size 300
-
-enum config_token_t {
- config_str, config_res_type, config_err
-};
-
-static match_table_t config_tokens = {
- {config_res_type,"res=%s"},
- {config_str, "config=%s"},
- {config_err, NULL},
-};
-
-
-MAGIC_PARSE(config);
-MAGIC_WRITE(config,set_config);
-MAGIC_SHOW(config);
-MAGIC_OPEN(config);
-MAGIC_CLOSE(config);
-
-MAGIC_RDWR_FILEOPS(config);
-
-
-/********************************************************************************
- * Members
- *
- * List members of a class
- *
- *******************************************************************************/
-
-MAGIC_SHOW(members);
-MAGIC_OPEN(members);
-MAGIC_CLOSE(members);
-
-MAGIC_RD_FILEOPS(members);
-
-
-/********************************************************************************
- * Stats
- *
- * Get/reset class statistics
- * No standard set of stats defined. Each resource controller chooses
- * its own set of statistics to maintain and export.
- *
- *******************************************************************************/
-
-#define stats_max_input_size 50
-
-enum stats_token_t {
- stats_res_type, stats_str,stats_err
-};
-
-static match_table_t stats_tokens = {
- {stats_res_type,"res=%s"},
- {stats_str, NULL},
- {stats_err, NULL},
-};
-
-
-MAGIC_PARSE(stats);
-MAGIC_WRITE(stats,reset_stats);
-MAGIC_SHOW(stats);
-MAGIC_OPEN(stats);
-MAGIC_CLOSE(stats);
-
-MAGIC_RDWR_FILEOPS(stats);
-
-
-/********************************************************************************
- * Shares
- *
- * Set/get shares of a taskclass.
- * Share types and semantics are defined by rcfs and ckrm core
- *
- *******************************************************************************/
-
-
-#define SHARES_MAX_INPUT_SIZE 300
-
-/* The enums for the share types should match the indices expected by
- array parameter to ckrm_set_resshare */
-
-/* Note only the first NUM_SHAREVAL enums correspond to share types,
- the remaining ones are for token matching purposes */
-
-enum share_token_t {
- MY_GUAR, MY_LIM, TOT_GUAR, MAX_LIM, SHARE_RES_TYPE, SHARE_ERR
-};
-
-/* Token matching for parsing input to this magic file */
-static match_table_t shares_tokens = {
- {SHARE_RES_TYPE, "res=%s"},
- {MY_GUAR, "guarantee=%d"},
- {MY_LIM, "limit=%d"},
- {TOT_GUAR,"total_guarantee=%d"},
- {MAX_LIM, "max_limit=%d"},
- {SHARE_ERR, NULL}
-};
-
-
-static int
-shares_parse(char *options, char **resstr, struct ckrm_shares *shares)
-{
- char *p;
- int option;
-
- if (!options)
- return 1;
-
- while ((p = strsep(&options, ",")) != NULL) {
-
- substring_t args[MAX_OPT_ARGS];
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, shares_tokens, args);
- switch (token) {
- case SHARE_RES_TYPE:
- *resstr = match_strdup(args);
- break;
- case MY_GUAR:
- if (match_int(args, &option))
- return 0;
- shares->my_guarantee = option;
- break;
- case MY_LIM:
- if (match_int(args, &option))
- return 0;
- shares->my_limit = option;
- break;
- case TOT_GUAR:
- if (match_int(args, &option))
- return 0;
- shares->total_guarantee = option;
- break;
- case MAX_LIM:
- if (match_int(args, &option))
- return 0;
- shares->max_limit = option;
- break;
- default:
- return 0;
- }
-
- }
- return 1;
-}
-
-
-static ssize_t
-shares_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct inode *inode = file->f_dentry->d_inode;
- struct rcfs_inode_info *ri;
- char *optbuf;
- int rc = 0;
- struct ckrm_core_class *core;
- int done;
- char *resname;
-
- struct ckrm_shares newshares = {
- CKRM_SHARE_UNCHANGED,
- CKRM_SHARE_UNCHANGED,
- CKRM_SHARE_UNCHANGED,
- CKRM_SHARE_UNCHANGED,
- CKRM_SHARE_UNCHANGED,
- CKRM_SHARE_UNCHANGED
- };
-
- if ((ssize_t) count < 0 || (ssize_t) count > SHARES_MAX_INPUT_SIZE)
- return -EINVAL;
-
- if (!access_ok(VERIFY_READ, buf, count))
- return -EFAULT;
-
- ri = RCFS_I(file->f_dentry->d_parent->d_inode);
-
- if (!ri || !ckrm_is_core_valid((ckrm_core_class_t *)(ri->core))) {
- printk(KERN_ERR "shares_write: Error accessing core class\n");
- return -EFAULT;
- }
-
- down(&inode->i_sem);
-
- core = ri->core;
- optbuf = kmalloc(SHARES_MAX_INPUT_SIZE, GFP_KERNEL);
- __copy_from_user(optbuf, buf, count);
- if (optbuf[count-1] == '\n')
- optbuf[count-1]='\0';
-
- done = shares_parse(optbuf, &resname, &newshares);
- if (!done) {
- printk(KERN_ERR "Error parsing shares\n");
- rc = -EINVAL;
- goto write_out;
- }
-
- if (core->classtype->set_shares) {
- rc = (*core->classtype->set_shares)(core,resname,&newshares);
- if (rc) {
- printk(KERN_ERR "shares_write: resctlr share set error\n");
- goto write_out;
- }
- }
-
- printk(KERN_ERR "Set %s shares to %d %d %d %d\n",
- resname,
- newshares.my_guarantee,
- newshares.my_limit,
- newshares.total_guarantee,
- newshares.max_limit);
-
- rc = count ;
-
-write_out:
-
- up(&inode->i_sem);
- kfree(optbuf);
- kfree(resname);
- return rc;
-}
-
-
-MAGIC_SHOW(shares);
-MAGIC_OPEN(shares);
-MAGIC_CLOSE(shares);
-
-MAGIC_RDWR_FILEOPS(shares);
-
-
-
-/*
- * magic file creation/deletion
- *
- */
-
-
-int
-rcfs_clear_magic(struct dentry *parent)
-{
- struct dentry *mftmp, *mfdentry ;
-
- list_for_each_entry_safe(mfdentry, mftmp, &parent->d_subdirs, d_child) {
-
- if (!rcfs_is_magic(mfdentry))
- continue ;
-
- if (rcfs_delete_internal(mfdentry))
- printk(KERN_ERR "rcfs_clear_magic: error deleting one\n");
- }
-
- return 0;
-
-}
-EXPORT_SYMBOL(rcfs_clear_magic);
-
-
-int
-rcfs_create_magic(struct dentry *parent, struct rcfs_magf magf[], int count)
-{
- int i;
- struct dentry *mfdentry;
-
- for (i=0; i<count; i++) {
- mfdentry = rcfs_create_internal(parent, &magf[i],0);
- if (IS_ERR(mfdentry)) {
- rcfs_clear_magic(parent);
- return -ENOMEM;
- }
- RCFS_I(mfdentry->d_inode)->core = RCFS_I(parent->d_inode)->core;
- mfdentry->d_fsdata = &RCFS_IS_MAGIC;
- if (magf[i].i_fop)
- mfdentry->d_inode->i_fop = magf[i].i_fop;
- if (magf[i].i_op)
- mfdentry->d_inode->i_op = magf[i].i_op;
- }
- return 0;
-}
-EXPORT_SYMBOL(rcfs_create_magic);
+++ /dev/null
-/*
- * fs/rcfs/rootdir.c
- *
- * Copyright (C) Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Functions for creating root directories and magic files
- * for classtypes and classification engines under rcfs
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 08 April 2004
- * Created.
- */
-
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/namei.h>
-#include <asm/namei.h>
-#include <linux/namespace.h>
-#include <linux/dcache.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/backing-dev.h>
-#include <linux/parser.h>
-
-#include <asm/uaccess.h>
-
-#include <linux/rcfs.h>
-
-
-
-rbce_eng_callback_t rcfs_eng_callbacks = {
- NULL, NULL
-};
-
-int
-rcfs_register_engine(rbce_eng_callback_t *rcbs)
-{
- if (!rcbs->mkdir || rcfs_eng_callbacks.mkdir) {
- return -EINVAL;
- }
- rcfs_eng_callbacks = *rcbs;
- return 0;
-}
-EXPORT_SYMBOL(rcfs_register_engine);
-
-
-
-int
-rcfs_unregister_engine(rbce_eng_callback_t *rcbs)
-{
- if (!rcbs->mkdir || !rcfs_eng_callbacks.mkdir ||
- (rcbs->mkdir != rcfs_eng_callbacks.mkdir)) {
- return -EINVAL;
- }
- rcfs_eng_callbacks.mkdir = NULL;
- rcfs_eng_callbacks.rmdir = NULL;
- return 0;
-}
-EXPORT_SYMBOL(rcfs_unregister_engine);
-
-
-
-
-/* rcfs_mkroot
- * Create and return a "root" dentry under /rcfs. Also create associated magic files
- *
- * @mfdesc: array of rcfs_magf describing root dir and its magic files
- * @count: number of entries in mfdesc
- * @core: core class to be associated with root
- * @rootde: output parameter to return the newly created root dentry
- */
-
-int
-rcfs_mkroot(struct rcfs_magf *mfdesc, int mfcount, struct dentry **rootde)
-{
- int sz;
- struct rcfs_magf *rootdesc = &mfdesc[0];
- struct dentry *dentry ;
- struct rcfs_inode_info *rootri;
-
- if ((mfcount < 0) || (!mfdesc))
- return -EINVAL;
-
- rootdesc = &mfdesc[0];
- printk("allocating classtype root <%s>\n",rootdesc->name);
- dentry = rcfs_create_internal(rcfs_rootde, rootdesc,0);
-
- if (!dentry) {
- printk(KERN_ERR "Could not create %s\n",rootdesc->name);
- return -ENOMEM;
- }
-
- rootri = RCFS_I(dentry->d_inode);
- sz = strlen(rootdesc->name) + strlen(RCFS_ROOT) + 2;
- rootri->name = kmalloc(sz, GFP_KERNEL);
- if (!rootri->name) {
- printk(KERN_ERR "Error allocating name for %s\n",
- rootdesc->name);
- rcfs_delete_internal(dentry);
- return -ENOMEM;
- }
- snprintf(rootri->name,sz,"%s/%s",RCFS_ROOT,rootdesc->name);
-
- if (rootdesc->i_fop)
- dentry->d_inode->i_fop = rootdesc->i_fop;
- if (rootdesc->i_op)
- dentry->d_inode->i_op = rootdesc->i_op;
-
- // set output parameters
- *rootde = dentry;
-
- return 0;
-}
-EXPORT_SYMBOL(rcfs_mkroot);
-
-
-int
-rcfs_rmroot(struct dentry *rootde)
-{
- if (!rootde)
- return -EINVAL;
-
- rcfs_clear_magic(rootde);
- kfree(RCFS_I(rootde->d_inode)->name);
- rcfs_delete_internal(rootde);
- return 0;
-}
-EXPORT_SYMBOL(rcfs_rmroot);
-
-
-int
-rcfs_register_classtype(ckrm_classtype_t *clstype)
-{
- int rc ;
- struct rcfs_inode_info *rootri;
- struct rcfs_magf *mfdesc;
-
- // Initialize mfdesc, mfcount
- clstype->mfdesc = (void *) genmfdesc[clstype->mfidx]->rootmf;
- clstype->mfcount = genmfdesc[clstype->mfidx]->rootmflen;
-
- mfdesc = (struct rcfs_magf *)clstype->mfdesc;
-
- /* rcfs root entry has the same name as the classtype */
- strncpy(mfdesc[0].name,clstype->name,RCFS_MAGF_NAMELEN) ;
-
- rc = rcfs_mkroot(mfdesc,clstype->mfcount,
- (struct dentry **)&(clstype->rootde));
- if (rc)
- return rc;
-
- rootri = RCFS_I(((struct dentry *)(clstype->rootde))->d_inode);
- rootri->core = clstype->default_class;
- clstype->default_class->name = rootri->name;
- ckrm_core_grab(clstype->default_class);
-
- // Create magic files under root
- if ((rc = rcfs_create_magic(clstype->rootde, &mfdesc[1],
- clstype->mfcount-1))) {
- kfree(rootri->name);
- rcfs_delete_internal(clstype->rootde);
- return rc;
- }
-
- return rc;
-}
-EXPORT_SYMBOL(rcfs_register_classtype);
-
-
-int
-rcfs_deregister_classtype(ckrm_classtype_t *clstype)
-{
- int rc;
-
- rc = rcfs_rmroot((struct dentry *)clstype->rootde);
- if (!rc) {
- clstype->default_class->name = NULL ;
- ckrm_core_drop(clstype->default_class);
- }
- return rc;
-}
-EXPORT_SYMBOL(rcfs_deregister_classtype);
-
-
-
-// Common root and magic file entries.
-// root name, root permissions, magic file names and magic file permissions are needed by
-// all entities (classtypes and classification engines) existing under the rcfs mount point
-
-// The common sets of these attributes are listed here as a table. Individual classtypes and
-// classification engines can simple specify the index into the table to initialize their
-// magf entries.
-//
-
-#ifdef CONFIG_CKRM_TYPE_TASKCLASS
-extern struct rcfs_mfdesc tc_mfdesc;
-#endif
-
-#ifdef CONFIG_CKRM_TYPE_TASKCLASS
-extern struct rcfs_mfdesc sock_mfdesc;
-#endif
-
-// extern struct rcfs_magf rbce_mfdesc;
-
-
-struct rcfs_mfdesc *genmfdesc[]={
-#ifdef CONFIG_CKRM_TYPE_TASKCLASS
- &tc_mfdesc,
-#else
- NULL,
-#endif
-#ifdef CONFIG_CKRM_TYPE_SOCKETCLASS
- &sock_mfdesc,
-#else
- NULL,
-#endif
-// Create similar entry for RBCE ?
-//#ifdef CONFIG_CKRM_CE
-// &rbce_mfdesc,
-//#else
-// NULL,
-//#endif
-
-};
-
-
-
-
+++ /dev/null
-/* ckrm_socketaq.c
- *
- * Copyright (C) Vivek Kashyap, IBM Corp. 2004
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- * Initial version
- */
-
-/*******************************************************************************
- * Socket class type
- *
- * Defines the root structure for socket based classes. Currently only inbound
- * connection control is supported based on prioritized accept queues.
- ******************************************************************************/
-
-
-#include <linux/rcfs.h>
-#include <net/tcp.h>
-
-extern int rcfs_create(struct inode *,struct dentry *, int, struct nameidata *);
-extern int rcfs_unlink(struct inode *, struct dentry *);
-extern int rcfs_symlink(struct inode *, struct dentry *, const char *);
-extern int rcfs_mknod(struct inode *, struct dentry *, int mode, dev_t);
-extern int rcfs_mkdir(struct inode *, struct dentry *, int);
-extern int rcfs_rmdir(struct inode *, struct dentry *);
-extern int rcfs_rename(struct inode *, struct dentry *, struct inode *,
- struct dentry *);
-
-extern int rcfs_create_coredir(struct inode *, struct dentry *);
-int sock_mkdir(struct inode *, struct dentry *, int mode);
-int sock_rmdir(struct inode *, struct dentry *);
-
-
-int sock_create_noperm(struct inode *, struct dentry *,int, struct nameidata *);
-int sock_unlink_noperm(struct inode *,struct dentry *);
-int sock_mkdir_noperm(struct inode *,struct dentry *,int);
-int sock_rmdir_noperm(struct inode *,struct dentry *);
-int sock_mknod_noperm(struct inode *,struct dentry *,int, dev_t);
-
-void sock_set_directory(void);
-
-extern struct file_operations config_fileops,
- members_fileops,
- shares_fileops,
- stats_fileops,
- target_fileops;
-
-
-struct inode_operations my_iops = {
- .create = rcfs_create,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = rcfs_unlink,
- .symlink = rcfs_symlink,
- .mkdir = sock_mkdir,
- .rmdir = sock_rmdir,
- .mknod = rcfs_mknod,
- .rename = rcfs_rename,
-};
-
-struct inode_operations class_iops = {
- .create = sock_create_noperm,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = sock_unlink_noperm,
- .symlink = rcfs_symlink,
- .mkdir = sock_mkdir_noperm,
- .rmdir = sock_rmdir_noperm,
- .mknod = sock_mknod_noperm,
- .rename = rcfs_rename,
-};
-
-struct inode_operations sub_iops = {
- .create = sock_create_noperm,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = sock_unlink_noperm,
- .symlink = rcfs_symlink,
- .mkdir = sock_mkdir_noperm,
- .rmdir = sock_rmdir_noperm,
- .mknod = sock_mknod_noperm,
- .rename = rcfs_rename,
-};
-
-struct rcfs_magf def_magf = {
- .mode = RCFS_DEFAULT_DIR_MODE,
- .i_op = &sub_iops,
- .i_fop = NULL,
-};
-
-struct rcfs_magf sock_rootdesc[] = {
- {
- // .name = should not be set, copy from classtype name,
- .mode = RCFS_DEFAULT_DIR_MODE,
- .i_op = &my_iops,
- //.i_fop = &simple_dir_operations,
- .i_fop = NULL,
- },
- {
- .name = "members",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &members_fileops,
- },
- {
- .name = "target",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &target_fileops,
- },
-};
-
-struct rcfs_magf sock_magf[] = {
- {
- .name = "config",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &config_fileops,
- },
- {
- .name = "members",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop =&members_fileops,
- },
- {
- .name = "shares",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &shares_fileops,
- },
- {
- .name = "stats",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &stats_fileops,
- },
- {
- .name = "target",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &target_fileops,
- },
-};
-
-struct rcfs_magf sub_magf[] = {
- {
- .name = "config",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &config_fileops,
- },
- {
- .name = "shares",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &shares_fileops,
- },
- {
- .name = "stats",
- .mode = RCFS_DEFAULT_FILE_MODE,
- .i_op = &my_iops,
- .i_fop = &stats_fileops,
- },
-};
-
-struct rcfs_mfdesc sock_mfdesc = {
- .rootmf = sock_rootdesc,
- .rootmflen = (sizeof(sock_rootdesc)/sizeof(struct rcfs_magf)),
-};
-
-
-#define SOCK_MAX_MAGF (sizeof(sock_magf)/sizeof(struct rcfs_magf))
-#define LAQ_MAX_SUBMAGF (sizeof(sub_magf)/sizeof(struct rcfs_magf))
-
-int
-sock_rmdir(struct inode *p, struct dentry *me)
-{
- struct dentry *mftmp, *mfdentry ;
-
- // delete all magic sub directories
- list_for_each_entry_safe(mfdentry, mftmp, &me->d_subdirs, d_child) {
- if (S_ISDIR(mfdentry->d_inode->i_mode))
- rcfs_rmdir(me->d_inode, mfdentry);
- }
- // delete ourselves
- rcfs_rmdir(p,me);
-
- return 0;
-}
-
-#ifdef NUM_ACCEPT_QUEUES
-#define LAQ_NUM_ACCEPT_QUEUES NUM_ACCEPT_QUEUES
-#else
-#define LAQ_NUM_ACCEPT_QUEUES 0
-#endif
-
-int
-sock_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
- int retval = 0;
- int i,j;
- struct dentry *pentry, *mfdentry;
-
- if (_rcfs_mknod(dir, dentry, mode | S_IFDIR, 0)) {
- printk(KERN_ERR "rcfs_mkdir: error reaching parent\n");
- return retval;
- }
-
- // Needed if only _rcfs_mknod is used instead of i_op->mkdir
- dir->i_nlink++;
-
- retval = rcfs_create_coredir(dir, dentry);
- if (retval)
- goto mkdir_err;
-
- /* create the default set of magic files */
- for (i =0; i < SOCK_MAX_MAGF; i++) {
- mfdentry = rcfs_create_internal(dentry, &sock_magf[i],0);
- mfdentry->d_fsdata = &RCFS_IS_MAGIC;
- RCFS_I(mfdentry->d_inode)->core =
- RCFS_I(dentry->d_inode)->core;
- if (sock_magf[i].i_fop)
- mfdentry->d_inode->i_fop = sock_magf[i].i_fop;
- if (sock_magf[i].i_op)
- mfdentry->d_inode->i_op = sock_magf[i].i_op;
- }
-
- for (i=1; i < LAQ_NUM_ACCEPT_QUEUES; i++) {
- j = sprintf(def_magf.name, "%d",i);
- def_magf.name[j] = '\0';
-
- pentry = rcfs_create_internal(dentry, &def_magf,0);
- retval = rcfs_create_coredir(dentry->d_inode, pentry);
- if (retval)
- goto mkdir_err;
- for (j=0; j < LAQ_MAX_SUBMAGF; j++) {
- mfdentry = rcfs_create_internal(pentry, &sub_magf[j],0);
- mfdentry->d_fsdata = &RCFS_IS_MAGIC;
- RCFS_I(mfdentry->d_inode)->core =
- RCFS_I(pentry->d_inode)->core;
- if (sub_magf[j].i_fop)
- mfdentry->d_inode->i_fop = sub_magf[j].i_fop;
- if (sub_magf[j].i_op)
- mfdentry->d_inode->i_op = sub_magf[j].i_op;
- }
- pentry->d_inode->i_op = &sub_iops;
- }
- dentry->d_inode->i_op = &class_iops;
- return 0;
-
-mkdir_err:
- // Needed
- dir->i_nlink--;
- return retval;
-}
-#ifndef NUM_ACCEPT_QUEUES
-#define NUM_ACCEPT_QUEUES 0
-#endif
-
-char *
-sock_get_name(struct ckrm_core_class *c)
-{
- char *p = (char *)c->name;
-
- while(*p)
- p++;
- while( *p != '/' && p != c->name)
- p--;
-
- return ++p;
-}
-
-int
-sock_create_noperm(struct inode *dir,struct dentry *dentry,int mode, struct nameidata *nd)
-{
- return -EPERM;
-}
-
-int
-sock_unlink_noperm(struct inode *dir,struct dentry *dentry)
-{
- return -EPERM;
-}
-
-int
-sock_mkdir_noperm(struct inode *dir,struct dentry *dentry, int mode)
-{
- return -EPERM;
-}
-
-int
-sock_rmdir_noperm(struct inode *dir,struct dentry *dentry)
-{
- return -EPERM;
-}
-
-int
-sock_mknod_noperm(struct inode *dir,struct dentry *dentry,int mode, dev_t dev)
-{
- return -EPERM;
-}
-
-#if 0
-void
-sock_set_directory()
-{
- struct dentry *pentry, *dentry;
-
- pentry = rcfs_set_magf_byname("listen_aq", (void *)&my_dir_magf[0]);
- if (pentry) {
- dentry = rcfs_create_internal(pentry, &my_dir_magf[1],0);
- if (my_dir_magf[1].i_fop)
- dentry->d_inode->i_fop = my_dir_magf[1].i_fop;
- RCFS_I(dentry->d_inode)->core =
- RCFS_I(pentry->d_inode)->core;
- dentry = rcfs_create_internal(pentry, &my_dir_magf[2],0);
- if (my_dir_magf[2].i_fop)
- dentry->d_inode->i_fop = my_dir_magf[2].i_fop;
- RCFS_I(dentry->d_inode)->core =
- RCFS_I(pentry->d_inode)->core;
- }
- else {
- printk(KERN_ERR "Could not create /rcfs/listen_aq\n"
- "Perhaps /rcfs needs to be mounted\n");
- }
-}
-#endif
-
+++ /dev/null
-/*
- * fs/rcfs/super.c
- *
- * Copyright (C) Shailabh Nagar, IBM Corp. 2004
- * Vivek Kashyap, IBM Corp. 2004
- *
- * Super block operations for rcfs
- *
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 08 Mar 2004
- * Created.
- */
-
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/namei.h>
-#include <asm/namei.h>
-#include <linux/namespace.h>
-#include <linux/dcache.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/backing-dev.h>
-#include <linux/parser.h>
-
-#include <asm/uaccess.h>
-
-#include <linux/rcfs.h>
-#include <linux/ckrm.h>
-
-
-static kmem_cache_t *rcfs_inode_cachep;
-
-
-inline struct rcfs_inode_info *RCFS_I(struct inode *inode)
-{
- return container_of(inode, struct rcfs_inode_info, vfs_inode);
-}
-EXPORT_SYMBOL(RCFS_I);
-
-
-
-static struct inode *
-rcfs_alloc_inode(struct super_block *sb)
-{
- struct rcfs_inode_info *ri;
- ri = (struct rcfs_inode_info *) kmem_cache_alloc(rcfs_inode_cachep,
- SLAB_KERNEL);
- if (!ri)
- return NULL;
- ri->name = NULL;
- return &ri->vfs_inode;
-}
-
-static void
-rcfs_destroy_inode(struct inode *inode)
-{
- struct rcfs_inode_info *ri = RCFS_I(inode);
-
- kfree(ri->name);
- kmem_cache_free(rcfs_inode_cachep, RCFS_I(inode));
-}
-
-static void
-rcfs_init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
-{
- struct rcfs_inode_info *ri = (struct rcfs_inode_info *) foo;
-
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&ri->vfs_inode);
-}
-
-int
-rcfs_init_inodecache(void)
-{
- rcfs_inode_cachep = kmem_cache_create("rcfs_inode_cache",
- sizeof(struct rcfs_inode_info),
- 0, SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT,
- rcfs_init_once, NULL);
- if (rcfs_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
-}
-
-void rcfs_destroy_inodecache(void)
-{
- printk(KERN_WARNING "destroy inodecache was called\n");
- if (kmem_cache_destroy(rcfs_inode_cachep))
- printk(KERN_INFO "rcfs_inode_cache: not all structures were freed\n");
-}
-
-struct super_operations rcfs_super_ops =
-{
- .alloc_inode = rcfs_alloc_inode,
- .destroy_inode = rcfs_destroy_inode,
- .statfs = simple_statfs,
- .drop_inode = generic_delete_inode,
-};
-
-
-struct dentry *rcfs_rootde; /* redundant since one can also get it from sb */
-static struct inode *rcfs_root;
-static struct rcfs_inode_info *rcfs_rootri;
-
-static int rcfs_mounted;
-
-static int rcfs_fill_super(struct super_block * sb, void * data, int silent)
-{
- struct inode * inode;
- struct dentry * root;
- struct rcfs_inode_info *rootri;
- struct ckrm_classtype *clstype;
- int i,rc;
-
- sb->s_fs_info = NULL;
- if (rcfs_mounted) {
- return -EPERM;
- }
- rcfs_mounted++;
-
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- sb->s_magic = RCFS_MAGIC;
- sb->s_op = &rcfs_super_ops;
- inode = rcfs_get_inode(sb, S_IFDIR | 0755, 0);
- if (!inode)
- return -ENOMEM;
- inode->i_op = &rcfs_rootdir_inode_operations;
-
- root = d_alloc_root(inode);
- if (!root) {
- iput(inode);
- return -ENOMEM;
- }
- sb->s_root = root;
-
-
- // Link inode and core class
- rootri = RCFS_I(inode);
- rootri->name = kmalloc(strlen(RCFS_ROOT) + 1, GFP_KERNEL);
- if (!rootri->name) {
- d_delete(root);
- iput(inode);
- return -ENOMEM;
- }
- strcpy(rootri->name, RCFS_ROOT);
- rootri->core = NULL;
-
- rcfs_root = inode;
- sb->s_fs_info = rcfs_root = inode;
- rcfs_rootde = root ;
- rcfs_rootri = rootri ;
-
- // register metatypes
- for ( i=0; i<CKRM_MAX_CLASSTYPES; i++) {
- clstype = ckrm_classtypes[i];
- if (clstype == NULL)
- continue;
- printk("A non null classtype\n");
-
- if ((rc = rcfs_register_classtype(clstype)))
- continue ; // could return with an error too
- }
-
- // register CE's with rcfs
- // check if CE loaded
- // call rcfs_register_engine for each classtype
- // AND rcfs_mkroot (preferably subsume latter in former)
-
- return 0;
-}
-
-
-static struct super_block *rcfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return get_sb_nodev(fs_type, flags, data, rcfs_fill_super);
-}
-
-
-void
-rcfs_kill_sb(struct super_block *sb)
-{
- int i,rc;
- struct ckrm_classtype *clstype;
-
- if (sb->s_fs_info != rcfs_root) {
- generic_shutdown_super(sb);
- return;
- }
- rcfs_mounted--;
-
- for ( i=0; i < CKRM_MAX_CLASSTYPES; i++) {
-
- clstype = ckrm_classtypes[i];
- if (clstype == NULL || clstype->rootde == NULL)
- continue;
-
- if ((rc = rcfs_deregister_classtype(clstype))) {
- printk(KERN_ERR "Error removing classtype %s\n",
- clstype->name);
- // return ; // can also choose to stop here
- }
- }
-
- // do not remove comment block until ce directory issue resolved
- // deregister CE with rcfs
- // Check if loaded
- // if ce is in one directory /rcfs/ce,
- // rcfs_deregister_engine for all classtypes within above
- // codebase
- // followed by
- // rcfs_rmroot here
- // if ce in multiple (per-classtype) directories
- // call rbce_deregister_engine within ckrm_deregister_classtype
-
- // following will automatically clear rcfs root entry including its
- // rcfs_inode_info
-
- generic_shutdown_super(sb);
-
- // printk(KERN_ERR "Removed all entries\n");
-}
-
-
-static struct file_system_type rcfs_fs_type = {
- .name = "rcfs",
- .get_sb = rcfs_get_sb,
- .kill_sb = rcfs_kill_sb,
-};
-
-struct rcfs_functions my_rcfs_fn = {
- .mkroot = rcfs_mkroot,
- .rmroot = rcfs_rmroot,
- .register_classtype = rcfs_register_classtype,
- .deregister_classtype = rcfs_deregister_classtype,
-};
-
-extern struct rcfs_functions rcfs_fn ;
-
-static int __init init_rcfs_fs(void)
-{
- int ret;
-
- ret = register_filesystem(&rcfs_fs_type);
- if (ret)
- goto init_register_err;
-
- ret = rcfs_init_inodecache();
- if (ret)
- goto init_cache_err;
-
- rcfs_fn = my_rcfs_fn ;
-
- return ret;
-
-init_cache_err:
- unregister_filesystem(&rcfs_fs_type);
-init_register_err:
- return ret;
-}
-
-static void __exit exit_rcfs_fs(void)
-{
- rcfs_destroy_inodecache();
- unregister_filesystem(&rcfs_fs_type);
-}
-
-module_init(init_rcfs_fs)
-module_exit(exit_rcfs_fs)
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * fs/rcfs/tc_magic.c
- *
- * Copyright (C) Shailabh Nagar, IBM Corp. 2004
- * (C) Vivek Kashyap, IBM Corp. 2004
- * (C) Chandra Seetharaman, IBM Corp. 2004
- * (C) Hubertus Franke, IBM Corp. 2004
- *
- *
- * define magic fileops for taskclass classtype
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 23 Apr 2004
- * Created.
- *
- */
-
-#include <linux/rcfs.h>
-#include <linux/ckrm_tc.h>
-
-
-/*******************************************************************************
- * Taskclass general
- *
- * Define structures for taskclass root directory and its magic files
- * In taskclasses, there is one set of magic files, created automatically under
- * the taskclass root (upon classtype registration) and each directory (class)
- * created subsequently. However, classtypes can also choose to have different
- * sets of magic files created under their root and other directories under root
- * using their mkdir function. RCFS only provides helper functions for creating
- * the root directory and its magic files
- *
- *******************************************************************************/
-
-#define TC_FILE_MODE (S_IFREG | S_IRUGO | S_IWUSR)
-
-#define NR_TCROOTMF 6
-struct rcfs_magf tc_rootdesc[NR_TCROOTMF] = {
- /* First entry must be root */
- {
-// .name = should not be set, copy from classtype name
- .mode = RCFS_DEFAULT_DIR_MODE,
- .i_op = &rcfs_dir_inode_operations,
- .i_fop = &simple_dir_operations,
- },
- /* Rest are root's magic files */
- {
- .name = "target",
- .mode = TC_FILE_MODE,
- .i_fop = &target_fileops,
- .i_op = &rcfs_file_inode_operations,
- },
- {
- .name = "config",
- .mode = TC_FILE_MODE,
- .i_fop = &config_fileops,
- .i_op = &rcfs_file_inode_operations,
- },
- {
- .name = "members",
- .mode = TC_FILE_MODE,
- .i_fop = &members_fileops,
- .i_op = &rcfs_file_inode_operations,
- },
- {
- .name = "stats",
- .mode = TC_FILE_MODE,
- .i_fop = &stats_fileops,
- .i_op = &rcfs_file_inode_operations,
- },
- {
- .name = "shares",
- .mode = TC_FILE_MODE,
- .i_fop = &shares_fileops,
- .i_op = &rcfs_file_inode_operations,
- },
-};
-
-struct rcfs_mfdesc tc_mfdesc = {
- .rootmf = tc_rootdesc,
- .rootmflen = NR_TCROOTMF,
-};
-
-
+++ /dev/null
-#include <linux/reiserfs_fs.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <asm/uaccess.h>
-
-#define XATTR_SECURITY_PREFIX "security."
-
-static int
-security_get (struct inode *inode, const char *name, void *buffer, size_t size)
-{
- if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
- return -EINVAL;
-
- if (is_reiserfs_priv_object(inode))
- return -EPERM;
-
- return reiserfs_xattr_get (inode, name, buffer, size);
-}
-
-static int
-security_set (struct inode *inode, const char *name, const void *buffer,
- size_t size, int flags)
-{
- if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
- return -EINVAL;
-
- if (is_reiserfs_priv_object(inode))
- return -EPERM;
-
- return reiserfs_xattr_set (inode, name, buffer, size, flags);
-}
-
-static int
-security_del (struct inode *inode, const char *name)
-{
- if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
- return -EINVAL;
-
- if (is_reiserfs_priv_object(inode))
- return -EPERM;
-
- return 0;
-}
-
-static int
-security_list (struct inode *inode, const char *name, int namelen, char *out)
-{
- int len = namelen;
-
- if (is_reiserfs_priv_object(inode))
- return 0;
-
- if (out)
- memcpy (out, name, len);
-
- return len;
-}
-
-
-struct reiserfs_xattr_handler security_handler = {
- prefix: XATTR_SECURITY_PREFIX,
- get: security_get,
- set: security_set,
- del: security_del,
- list: security_list,
-};
+++ /dev/null
-#include <linux/reiserfs_fs.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <asm/uaccess.h>
-
-#define XATTR_TRUSTED_PREFIX "trusted."
-
-static int
-trusted_get (struct inode *inode, const char *name, void *buffer, size_t size)
-{
- if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs (inode->i_sb))
- return -EOPNOTSUPP;
-
- if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
- return -EPERM;
-
- return reiserfs_xattr_get (inode, name, buffer, size);
-}
-
-static int
-trusted_set (struct inode *inode, const char *name, const void *buffer,
- size_t size, int flags)
-{
- if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs (inode->i_sb))
- return -EOPNOTSUPP;
-
- if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
- return -EPERM;
-
- return reiserfs_xattr_set (inode, name, buffer, size, flags);
-}
-
-static int
-trusted_del (struct inode *inode, const char *name)
-{
- if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs (inode->i_sb))
- return -EOPNOTSUPP;
-
- if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
- return -EPERM;
-
- return 0;
-}
-
-static int
-trusted_list (struct inode *inode, const char *name, int namelen, char *out)
-{
- int len = namelen;
-
- if (!reiserfs_xattrs (inode->i_sb))
- return 0;
-
- if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode)))
- return 0;
-
- if (out)
- memcpy (out, name, len);
-
- return len;
-}
-
-
-struct reiserfs_xattr_handler trusted_handler = {
- prefix: XATTR_TRUSTED_PREFIX,
- get: trusted_get,
- set: trusted_set,
- del: trusted_del,
- list: trusted_list,
-};
+++ /dev/null
-#include <linux/reiserfs_fs.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include <linux/xattr.h>
-#include <linux/reiserfs_xattr.h>
-#include <asm/uaccess.h>
-
-#ifdef CONFIG_REISERFS_FS_POSIX_ACL
-# include <linux/reiserfs_acl.h>
-#endif
-
-#define XATTR_USER_PREFIX "user."
-
-static int
-user_get (struct inode *inode, const char *name, void *buffer, size_t size)
-{
-
- int error;
-
- if (strlen(name) < sizeof(XATTR_USER_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs_user (inode->i_sb))
- return -EOPNOTSUPP;
-
- error = reiserfs_permission_locked (inode, MAY_READ, NULL);
- if (error)
- return error;
-
- return reiserfs_xattr_get (inode, name, buffer, size);
-}
-
-static int
-user_set (struct inode *inode, const char *name, const void *buffer,
- size_t size, int flags)
-{
-
- int error;
-
- if (strlen(name) < sizeof(XATTR_USER_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs_user (inode->i_sb))
- return -EOPNOTSUPP;
-
- if (!S_ISREG (inode->i_mode) &&
- (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX))
- return -EPERM;
-
- error = reiserfs_permission_locked (inode, MAY_WRITE, NULL);
- if (error)
- return error;
-
- return reiserfs_xattr_set (inode, name, buffer, size, flags);
-}
-
-static int
-user_del (struct inode *inode, const char *name)
-{
- int error;
-
- if (strlen(name) < sizeof(XATTR_USER_PREFIX))
- return -EINVAL;
-
- if (!reiserfs_xattrs_user (inode->i_sb))
- return -EOPNOTSUPP;
-
- if (!S_ISREG (inode->i_mode) &&
- (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX))
- return -EPERM;
-
- error = reiserfs_permission_locked (inode, MAY_WRITE, NULL);
- if (error)
- return error;
-
- return 0;
-}
-
-static int
-user_list (struct inode *inode, const char *name, int namelen, char *out)
-{
- int len = namelen;
- if (!reiserfs_xattrs_user (inode->i_sb))
- return 0;
-
- if (out)
- memcpy (out, name, len);
-
- return len;
-}
-
-struct reiserfs_xattr_handler user_handler = {
- prefix: XATTR_USER_PREFIX,
- get: user_get,
- set: user_set,
- del: user_del,
- list: user_list,
-};
+++ /dev/null
-#
-# relayfs Makefile
-#
-
-obj-$(CONFIG_RELAYFS_FS) += relayfs.o
-
-relayfs-y := relay.o relay_lockless.o relay_locking.o inode.o resize.o
-relayfs-$(CONFIG_KLOG_CHANNEL) += klog.o
+++ /dev/null
-/*
- * VFS-related code for RelayFS, a high-speed data relay filesystem.
- *
- * Copyright (C) 2003 - Tom Zanussi <zanussi@us.ibm.com>, IBM Corp
- * Copyright (C) 2003 - Karim Yaghmour <karim@opersys.com>
- *
- * Based on ramfs, Copyright (C) 2002 - Linus Torvalds
- *
- * This file is released under the GPL.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/pagemap.h>
-#include <linux/highmem.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/smp_lock.h>
-#include <linux/backing-dev.h>
-#include <linux/namei.h>
-#include <linux/poll.h>
-#include <asm/uaccess.h>
-#include <asm/relay.h>
-
-#define RELAYFS_MAGIC 0x26F82121
-
-static struct super_operations relayfs_ops;
-static struct address_space_operations relayfs_aops;
-static struct inode_operations relayfs_file_inode_operations;
-static struct file_operations relayfs_file_operations;
-static struct inode_operations relayfs_dir_inode_operations;
-
-static struct vfsmount * relayfs_mount;
-static int relayfs_mount_count;
-
-static struct backing_dev_info relayfs_backing_dev_info = {
- .ra_pages = 0, /* No readahead */
- .memory_backed = 1, /* Does not contribute to dirty memory */
-};
-
-static struct inode *
-relayfs_get_inode(struct super_block *sb, int mode, dev_t dev)
-{
- struct inode * inode;
-
- inode = new_inode(sb);
-
- if (inode) {
- inode->i_mode = mode;
- inode->i_uid = current->fsuid;
- inode->i_gid = current->fsgid;
- inode->i_blksize = PAGE_CACHE_SIZE;
- inode->i_blocks = 0;
- inode->i_mapping->a_ops = &relayfs_aops;
- inode->i_mapping->backing_dev_info = &relayfs_backing_dev_info;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- switch (mode & S_IFMT) {
- default:
- init_special_inode(inode, mode, dev);
- break;
- case S_IFREG:
- inode->i_op = &relayfs_file_inode_operations;
- inode->i_fop = &relayfs_file_operations;
- break;
- case S_IFDIR:
- inode->i_op = &relayfs_dir_inode_operations;
- inode->i_fop = &simple_dir_operations;
-
- /* directory inodes start off with i_nlink == 2 (for "." entry) */
- inode->i_nlink++;
- break;
- case S_IFLNK:
- inode->i_op = &page_symlink_inode_operations;
- break;
- }
- }
- return inode;
-}
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-/* SMP-safe */
-static int
-relayfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
-{
- struct inode * inode;
- int error = -ENOSPC;
-
- inode = relayfs_get_inode(dir->i_sb, mode, dev);
-
- if (inode) {
- d_instantiate(dentry, inode);
- dget(dentry); /* Extra count - pin the dentry in core */
- error = 0;
- }
- return error;
-}
-
-static int
-relayfs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
-{
- int retval;
-
- retval = relayfs_mknod(dir, dentry, mode | S_IFDIR, 0);
-
- if (!retval)
- dir->i_nlink++;
- return retval;
-}
-
-static int
-relayfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
-{
- return relayfs_mknod(dir, dentry, mode | S_IFREG, 0);
-}
-
-static int
-relayfs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
-{
- struct inode *inode;
- int error = -ENOSPC;
-
- inode = relayfs_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0);
-
- if (inode) {
- int l = strlen(symname)+1;
- error = page_symlink(inode, symname, l);
- if (!error) {
- d_instantiate(dentry, inode);
- dget(dentry);
- } else
- iput(inode);
- }
- return error;
-}
-
-/**
- * relayfs_create_entry - create a relayfs directory or file
- * @name: the name of the file to create
- * @parent: parent directory
- * @dentry: result dentry
- * @entry_type: type of file to create (S_IFREG, S_IFDIR)
- * @mode: mode
- * @data: data to associate with the file
- *
- * Creates a file or directory with the specifed permissions.
- */
-static int
-relayfs_create_entry(const char * name, struct dentry * parent, struct dentry **dentry, int entry_type, int mode, void * data)
-{
- struct qstr qname;
- struct dentry * d;
-
- int error = 0;
-
- error = simple_pin_fs("relayfs", &relayfs_mount, &relayfs_mount_count);
- if (error) {
- printk(KERN_ERR "Couldn't mount relayfs: errcode %d\n", error);
- return error;
- }
-
- qname.name = name;
- qname.len = strlen(name);
- qname.hash = full_name_hash(name, qname.len);
-
- if (parent == NULL)
- if (relayfs_mount && relayfs_mount->mnt_sb)
- parent = relayfs_mount->mnt_sb->s_root;
-
- if (parent == NULL) {
- simple_release_fs(&relayfs_mount, &relayfs_mount_count);
- return -EINVAL;
- }
-
- parent = dget(parent);
- down(&parent->d_inode->i_sem);
- d = lookup_hash(&qname, parent);
- if (IS_ERR(d)) {
- error = PTR_ERR(d);
- goto release_mount;
- }
-
- if (d->d_inode) {
- error = -EEXIST;
- goto release_mount;
- }
-
- if (entry_type == S_IFREG)
- error = relayfs_create(parent->d_inode, d, entry_type | mode, NULL);
- else
- error = relayfs_mkdir(parent->d_inode, d, entry_type | mode);
- if (error)
- goto release_mount;
-
- if ((entry_type == S_IFREG) && data) {
- d->d_inode->u.generic_ip = data;
- goto exit; /* don't release mount for regular files */
- }
-
-release_mount:
- simple_release_fs(&relayfs_mount, &relayfs_mount_count);
-exit:
- *dentry = d;
- up(&parent->d_inode->i_sem);
- dput(parent);
-
- return error;
-}
-
-/**
- * relayfs_create_file - create a file in the relay filesystem
- * @name: the name of the file to create
- * @parent: parent directory
- * @dentry: result dentry
- * @data: data to associate with the file
- * @mode: mode, if not specied the default perms are used
- *
- * The file will be created user rw on behalf of current user.
- */
-int
-relayfs_create_file(const char * name, struct dentry * parent, struct dentry **dentry, void * data, int mode)
-{
- if (!mode)
- mode = S_IRUSR | S_IWUSR;
-
- return relayfs_create_entry(name, parent, dentry, S_IFREG,
- mode, data);
-}
-
-/**
- * relayfs_create_dir - create a directory in the relay filesystem
- * @name: the name of the directory to create
- * @parent: parent directory
- * @dentry: result dentry
- *
- * The directory will be created world rwx on behalf of current user.
- */
-int
-relayfs_create_dir(const char * name, struct dentry * parent, struct dentry **dentry)
-{
- return relayfs_create_entry(name, parent, dentry, S_IFDIR,
- S_IRWXU | S_IRUGO | S_IXUGO, NULL);
-}
-
-/**
- * relayfs_remove_file - remove a file in the relay filesystem
- * @dentry: file dentry
- *
- * Remove a file previously created by relayfs_create_file.
- */
-int
-relayfs_remove_file(struct dentry *dentry)
-{
- struct dentry *parent;
- int is_reg;
-
- parent = dentry->d_parent;
- if (parent == NULL)
- return -EINVAL;
-
- is_reg = S_ISREG(dentry->d_inode->i_mode);
-
- parent = dget(parent);
- down(&parent->d_inode->i_sem);
- if (dentry->d_inode) {
- simple_unlink(parent->d_inode, dentry);
- d_delete(dentry);
- }
- dput(dentry);
- up(&parent->d_inode->i_sem);
- dput(parent);
-
- if(is_reg)
- simple_release_fs(&relayfs_mount, &relayfs_mount_count);
-
- return 0;
-}
-
-/**
- * relayfs_open - open file op for relayfs files
- * @inode: the inode
- * @filp: the file
- *
- * Associates the channel with the file, and increments the
- * channel refcount. Reads will be 'auto-consuming'.
- */
-int
-relayfs_open(struct inode *inode, struct file *filp)
-{
- struct rchan *rchan;
- struct rchan_reader *reader;
- int retval = 0;
-
- if (inode->u.generic_ip) {
- rchan = (struct rchan *)inode->u.generic_ip;
- if (rchan == NULL)
- return -EACCES;
- reader = __add_rchan_reader(rchan, filp, 1, 0);
- if (reader == NULL)
- return -ENOMEM;
- filp->private_data = reader;
- retval = rchan->callbacks->fileop_notify(rchan->id, filp,
- RELAY_FILE_OPEN);
- if (retval == 0)
- /* Inc relay channel refcount for file */
- rchan_get(rchan->id);
- else {
- __remove_rchan_reader(reader);
- retval = -EPERM;
- }
- }
-
- return retval;
-}
-
-/**
- * relayfs_mmap - mmap file op for relayfs files
- * @filp: the file
- * @vma: the vma describing what to map
- *
- * Calls upon relay_mmap_buffer to map the file into user space.
- */
-int
-relayfs_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct rchan *rchan;
-
- rchan = ((struct rchan_reader *)filp->private_data)->rchan;
-
- return __relay_mmap_buffer(rchan, vma);
-}
-
-/**
- * relayfs_file_read - read file op for relayfs files
- * @filp: the file
- * @buf: user buf to read into
- * @count: bytes requested
- * @offset: offset into file
- *
- * Reads count bytes from the channel, or as much as is available within
- * the sub-buffer currently being read. Reads are 'auto-consuming'.
- * See relay_read() for details.
- *
- * Returns bytes read on success, 0 or -EAGAIN if nothing available,
- * negative otherwise.
- */
-ssize_t
-relayfs_file_read(struct file *filp, char * buf, size_t count, loff_t *offset)
-{
- size_t read_count;
- struct rchan_reader *reader;
- u32 dummy; /* all VFS readers are auto-consuming */
-
- if (offset != &filp->f_pos) /* pread, seeking not supported */
- return -ESPIPE;
-
- if (count == 0)
- return 0;
-
- reader = (struct rchan_reader *)filp->private_data;
- read_count = relay_read(reader, buf, count,
- filp->f_flags & (O_NDELAY | O_NONBLOCK) ? 0 : 1, &dummy);
-
- return read_count;
-}
-
-/**
- * relayfs_file_write - write file op for relayfs files
- * @filp: the file
- * @buf: user buf to write from
- * @count: bytes to write
- * @offset: offset into file
- *
- * Reserves a slot in the relay buffer and writes count bytes
- * into it. The current limit for a single write is 2 pages
- * worth. The user_deliver() channel callback will be invoked on
- *
- * Returns bytes written on success, 0 or -EAGAIN if nothing available,
- * negative otherwise.
- */
-ssize_t
-relayfs_file_write(struct file *filp, const char *buf, size_t count, loff_t *offset)
-{
- int write_count;
- char * write_buf;
- struct rchan *rchan;
- int err = 0;
- void *wrote_pos;
- struct rchan_reader *reader;
-
- reader = (struct rchan_reader *)filp->private_data;
- if (reader == NULL)
- return -EPERM;
-
- rchan = reader->rchan;
- if (rchan == NULL)
- return -EPERM;
-
- if (count == 0)
- return 0;
-
- /* Change this if need to write more than 2 pages at once */
- if (count > 2 * PAGE_SIZE)
- return -EINVAL;
-
- write_buf = (char *)__get_free_pages(GFP_KERNEL, 1);
- if (write_buf == NULL)
- return -ENOMEM;
-
- if (copy_from_user(write_buf, buf, count))
- return -EFAULT;
-
- if (filp->f_flags & (O_NDELAY | O_NONBLOCK)) {
- write_count = relay_write(rchan->id, write_buf, count, -1, &wrote_pos);
- if (write_count == 0)
- return -EAGAIN;
- } else {
- err = wait_event_interruptible(rchan->write_wait,
- (write_count = relay_write(rchan->id, write_buf, count, -1, &wrote_pos)));
- if (err)
- return err;
- }
-
- free_pages((unsigned long)write_buf, 1);
-
- rchan->callbacks->user_deliver(rchan->id, wrote_pos, write_count);
-
- return write_count;
-}
-
-/**
- * relayfs_ioctl - ioctl file op for relayfs files
- * @inode: the inode
- * @filp: the file
- * @cmd: the command
- * @arg: command arg
- *
- * Passes the specified cmd/arg to the kernel client. arg may be a
- * pointer to user-space data, in which case the kernel client is
- * responsible for copying the data to/from user space appropriately.
- * The kernel client is also responsible for returning a meaningful
- * return value for ioctl calls.
- *
- * Returns result of relay channel callback, -EPERM if unsuccessful.
- */
-int
-relayfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
-{
- struct rchan *rchan;
- struct rchan_reader *reader;
-
- reader = (struct rchan_reader *)filp->private_data;
- if (reader == NULL)
- return -EPERM;
-
- rchan = reader->rchan;
- if (rchan == NULL)
- return -EPERM;
-
- return rchan->callbacks->ioctl(rchan->id, cmd, arg);
-}
-
-/**
- * relayfs_poll - poll file op for relayfs files
- * @filp: the file
- * @wait: poll table
- *
- * Poll implemention.
- */
-static unsigned int
-relayfs_poll(struct file *filp, poll_table *wait)
-{
- struct rchan_reader *reader;
- unsigned int mask = 0;
-
- reader = (struct rchan_reader *)filp->private_data;
-
- if (reader->rchan->finalized)
- return POLLERR;
-
- if (filp->f_mode & FMODE_READ) {
- poll_wait(filp, &reader->rchan->read_wait, wait);
- if (!rchan_empty(reader))
- mask |= POLLIN | POLLRDNORM;
- }
-
- if (filp->f_mode & FMODE_WRITE) {
- poll_wait(filp, &reader->rchan->write_wait, wait);
- if (!rchan_full(reader))
- mask |= POLLOUT | POLLWRNORM;
- }
-
- return mask;
-}
-
-/**
- * relayfs_release - release file op for relayfs files
- * @inode: the inode
- * @filp: the file
- *
- * Decrements the channel refcount, as the filesystem is
- * no longer using it.
- */
-int
-relayfs_release(struct inode *inode, struct file *filp)
-{
- struct rchan_reader *reader;
- struct rchan *rchan;
-
- reader = (struct rchan_reader *)filp->private_data;
- if (reader == NULL || reader->rchan == NULL)
- return 0;
- rchan = reader->rchan;
-
- rchan->callbacks->fileop_notify(reader->rchan->id, filp,
- RELAY_FILE_CLOSE);
- __remove_rchan_reader(reader);
- /* The channel is no longer in use as far as this file is concerned */
- rchan_put(rchan);
-
- return 0;
-}
-
-static struct address_space_operations relayfs_aops = {
- .readpage = simple_readpage,
- .prepare_write = simple_prepare_write,
- .commit_write = simple_commit_write
-};
-
-static struct file_operations relayfs_file_operations = {
- .open = relayfs_open,
- .read = relayfs_file_read,
- .write = relayfs_file_write,
- .ioctl = relayfs_ioctl,
- .poll = relayfs_poll,
- .mmap = relayfs_mmap,
- .fsync = simple_sync_file,
- .release = relayfs_release,
-};
-
-static struct inode_operations relayfs_file_inode_operations = {
- .getattr = simple_getattr,
-};
-
-static struct inode_operations relayfs_dir_inode_operations = {
- .create = relayfs_create,
- .lookup = simple_lookup,
- .link = simple_link,
- .unlink = simple_unlink,
- .symlink = relayfs_symlink,
- .mkdir = relayfs_mkdir,
- .rmdir = simple_rmdir,
- .mknod = relayfs_mknod,
- .rename = simple_rename,
-};
-
-static struct super_operations relayfs_ops = {
- .statfs = simple_statfs,
- .drop_inode = generic_delete_inode,
-};
-
-static int
-relayfs_fill_super(struct super_block * sb, void * data, int silent)
-{
- struct inode * inode;
- struct dentry * root;
-
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- sb->s_magic = RELAYFS_MAGIC;
- sb->s_op = &relayfs_ops;
- inode = relayfs_get_inode(sb, S_IFDIR | 0755, 0);
-
- if (!inode)
- return -ENOMEM;
-
- root = d_alloc_root(inode);
- if (!root) {
- iput(inode);
- return -ENOMEM;
- }
- sb->s_root = root;
-
- return 0;
-}
-
-static struct super_block *
-relayfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
-{
- return get_sb_single(fs_type, flags, data, relayfs_fill_super);
-}
-
-static struct file_system_type relayfs_fs_type = {
- .owner = THIS_MODULE,
- .name = "relayfs",
- .get_sb = relayfs_get_sb,
- .kill_sb = kill_litter_super,
-};
-
-static int __init
-init_relayfs_fs(void)
-{
- int err = register_filesystem(&relayfs_fs_type);
-#ifdef CONFIG_KLOG_CHANNEL
- if (!err)
- create_klog_channel();
-#endif
- return err;
-}
-
-static void __exit
-exit_relayfs_fs(void)
-{
-#ifdef CONFIG_KLOG_CHANNEL
- remove_klog_channel();
-#endif
- unregister_filesystem(&relayfs_fs_type);
-}
-
-module_init(init_relayfs_fs)
-module_exit(exit_relayfs_fs)
-
-MODULE_AUTHOR("Tom Zanussi <zanussi@us.ibm.com> and Karim Yaghmour <karim@opersys.com>");
-MODULE_DESCRIPTION("Relay Filesystem");
-MODULE_LICENSE("GPL");
-
+++ /dev/null
-/*
- * KLOG Generic Logging facility built upon the relayfs infrastructure
- *
- * Authors: Hubertus Franke (frankeh@us.ibm.com)
- * Tom Zanussi (zanussi@us.ibm.com)
- *
- * Please direct all questions/comments to zanussi@us.ibm.com
- *
- * Copyright (C) 2003, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/smp_lock.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/config.h>
-#include <linux/delay.h>
-#include <linux/smp.h>
-#include <linux/sysctl.h>
-#include <linux/relayfs_fs.h>
-#include <linux/klog.h>
-
-/* klog channel id */
-static int klog_channel = -1;
-
-/* maximum size of klog formatting buffer beyond which truncation will occur */
-#define KLOG_BUF_SIZE (512)
-/* per-cpu klog formatting buffer */
-static char buf[NR_CPUS][KLOG_BUF_SIZE];
-
-/*
- * klog_enabled determines whether klog()/klog_raw() actually do write
- * to the klog channel at any given time. If klog_enabled == 1 they do,
- * otherwise they don't. Settable using sysctl fs.relayfs.klog_enabled.
- */
-#ifdef CONFIG_KLOG_CHANNEL_AUTOENABLE
-static int klog_enabled = 1;
-#else
-static int klog_enabled = 0;
-#endif
-
-/**
- * klog - write a formatted string into the klog channel
- * @fmt: format string
- *
- * Returns number of bytes written, negative number on failure.
- */
-int klog(const char *fmt, ...)
-{
- va_list args;
- int len, err;
- char *cbuf;
- unsigned long flags;
-
- if (!klog_enabled || klog_channel < 0)
- return 0;
-
- local_irq_save(flags);
- cbuf = buf[smp_processor_id()];
-
- va_start(args, fmt);
- len = vsnprintf(cbuf, KLOG_BUF_SIZE, fmt, args);
- va_end(args);
-
- err = relay_write(klog_channel, cbuf, len, -1, NULL);
- local_irq_restore(flags);
-
- return err;
-}
-
-/**
- * klog_raw - directly write into the klog channel
- * @buf: buffer containing data to write
- * @len: # bytes to write
- *
- * Returns number of bytes written, negative number on failure.
- */
-int klog_raw(const char *buf,int len)
-{
- int err = 0;
-
- if (klog_enabled && klog_channel >= 0)
- err = relay_write(klog_channel, buf, len, -1, NULL);
-
- return err;
-}
-
-/**
- * relayfs sysctl data
- *
- * Only sys/fs/relayfs/klog_enabled for now.
- */
-#define CTL_ENABLE_KLOG 100
-#define CTL_RELAYFS 100
-
-static struct ctl_table_header *relayfs_ctl_table_header;
-
-static struct ctl_table relayfs_table[] =
-{
- {
- .ctl_name = CTL_ENABLE_KLOG,
- .procname = "klog_enabled",
- .data = &klog_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- 0
- }
-};
-
-static struct ctl_table relayfs_dir_table[] =
-{
- {
- .ctl_name = CTL_RELAYFS,
- .procname = "relayfs",
- .data = NULL,
- .maxlen = 0,
- .mode = 0555,
- .child = relayfs_table,
- },
- {
- 0
- }
-};
-
-static struct ctl_table relayfs_root_table[] =
-{
- {
- .ctl_name = CTL_FS,
- .procname = "fs",
- .data = NULL,
- .maxlen = 0,
- .mode = 0555,
- .child = relayfs_dir_table,
- },
- {
- 0
- }
-};
-
-/**
- * create_klog_channel - creates channel /mnt/relay/klog
- *
- * Returns channel id on success, negative otherwise.
- */
-int
-create_klog_channel(void)
-{
- u32 bufsize, nbufs;
- u32 channel_flags;
-
- channel_flags = RELAY_DELIVERY_PACKET | RELAY_USAGE_GLOBAL;
- channel_flags |= RELAY_SCHEME_ANY | RELAY_TIMESTAMP_ANY;
-
- bufsize = 1 << (CONFIG_KLOG_CHANNEL_SHIFT - 2);
- nbufs = 4;
-
- klog_channel = relay_open("klog",
- bufsize,
- nbufs,
- channel_flags,
- NULL,
- 0,
- 0,
- 0,
- 0,
- 0,
- 0,
- NULL,
- 0);
-
- if (klog_channel < 0)
- printk("klog channel creation failed, errcode: %d\n", klog_channel);
- else {
- printk("klog channel created (%u bytes)\n", 1 << CONFIG_KLOG_CHANNEL_SHIFT);
- relayfs_ctl_table_header = register_sysctl_table(relayfs_root_table, 1);
- }
-
- return klog_channel;
-}
-
-/**
- * remove_klog_channel - destroys channel /mnt/relay/klog
- *
- * Returns 0, negative otherwise.
- */
-int
-remove_klog_channel(void)
-{
- if (relayfs_ctl_table_header)
- unregister_sysctl_table(relayfs_ctl_table_header);
-
- return relay_close(klog_channel);
-}
-
-EXPORT_SYMBOL(klog);
-EXPORT_SYMBOL(klog_raw);
-
+++ /dev/null
-/*
- * Public API and common code for RelayFS.
- *
- * Please see Documentation/filesystems/relayfs.txt for API description.
- *
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 1999, 2000, 2001, 2002 - Karim Yaghmour (karim@opersys.com)
- *
- * This file is released under the GPL.
- */
-
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/stddef.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/time.h>
-#include <linux/page-flags.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/current.h>
-#include <asm/uaccess.h>
-#include <asm/bitops.h>
-#include <asm/pgtable.h>
-#include <asm/relay.h>
-#include <asm/hardirq.h>
-
-#include "relay_lockless.h"
-#include "relay_locking.h"
-#include "resize.h"
-
-/* Relay channel table, indexed by channel id */
-static struct rchan * rchan_table[RELAY_MAX_CHANNELS];
-static rwlock_t rchan_table_lock = RW_LOCK_UNLOCKED;
-
-/* Relay operation structs, one per scheme */
-static struct relay_ops lockless_ops = {
- .reserve = lockless_reserve,
- .commit = lockless_commit,
- .get_offset = lockless_get_offset,
- .finalize = lockless_finalize,
- .reset = lockless_reset,
- .reset_index = lockless_reset_index
-};
-
-static struct relay_ops locking_ops = {
- .reserve = locking_reserve,
- .commit = locking_commit,
- .get_offset = locking_get_offset,
- .finalize = locking_finalize,
- .reset = locking_reset,
- .reset_index = locking_reset_index
-};
-
-/*
- * Low-level relayfs kernel API. These functions should not normally be
- * used by clients. See high-level kernel API below.
- */
-
-/**
- * rchan_get - get channel associated with id, incrementing refcount
- * @rchan_id: the channel id
- *
- * Returns channel if successful, NULL otherwise.
- */
-struct rchan *
-rchan_get(int rchan_id)
-{
- struct rchan *rchan;
-
- if ((rchan_id < 0) || (rchan_id >= RELAY_MAX_CHANNELS))
- return NULL;
-
- read_lock(&rchan_table_lock);
- rchan = rchan_table[rchan_id];
- if (rchan)
- atomic_inc(&rchan->refcount);
- read_unlock(&rchan_table_lock);
-
- return rchan;
-}
-
-/**
- * clear_readers - clear non-VFS readers
- * @rchan: the channel
- *
- * Clear the channel pointers of all non-VFS readers open on the channel.
- */
-static inline void
-clear_readers(struct rchan *rchan)
-{
- struct list_head *p;
- struct rchan_reader *reader;
-
- read_lock(&rchan->open_readers_lock);
- list_for_each(p, &rchan->open_readers) {
- reader = list_entry(p, struct rchan_reader, list);
- if (!reader->vfs_reader)
- reader->rchan = NULL;
- }
- read_unlock(&rchan->open_readers_lock);
-}
-
-/**
- * rchan_alloc_id - reserve a channel id and store associated channel
- * @rchan: the channel
- *
- * Returns channel id if successful, -1 otherwise.
- */
-static inline int
-rchan_alloc_id(struct rchan *rchan)
-{
- int i;
- int rchan_id = -1;
-
- if (rchan == NULL)
- return -1;
-
- write_lock(&rchan_table_lock);
- for (i = 0; i < RELAY_MAX_CHANNELS; i++) {
- if (rchan_table[i] == NULL) {
- rchan_table[i] = rchan;
- rchan_id = rchan->id = i;
- break;
- }
- }
- if (rchan_id != -1)
- atomic_inc(&rchan->refcount);
- write_unlock(&rchan_table_lock);
-
- return rchan_id;
-}
-
-/**
- * rchan_free_id - revoke a channel id and remove associated channel
- * @rchan_id: the channel id
- */
-static inline void
-rchan_free_id(int rchan_id)
-{
- struct rchan *rchan;
-
- if ((rchan_id < 0) || (rchan_id >= RELAY_MAX_CHANNELS))
- return;
-
- write_lock(&rchan_table_lock);
- rchan = rchan_table[rchan_id];
- rchan_table[rchan_id] = NULL;
- write_unlock(&rchan_table_lock);
-}
-
-/**
- * rchan_destroy_buf - destroy the current channel buffer
- * @rchan: the channel
- */
-static inline void
-rchan_destroy_buf(struct rchan *rchan)
-{
- if (rchan->buf && !rchan->init_buf)
- free_rchan_buf(rchan->buf,
- rchan->buf_page_array,
- rchan->buf_page_count);
-}
-
-/**
- * relay_release - perform end-of-buffer processing for last buffer
- * @rchan: the channel
- *
- * Returns 0 if successful, negative otherwise.
- *
- * Releases the channel buffer, destroys the channel, and removes the
- * relay file from the relayfs filesystem. Should only be called from
- * rchan_put(). If we're here, it means by definition refcount is 0.
- */
-static int
-relay_release(struct rchan *rchan)
-{
- if (rchan == NULL)
- return -EBADF;
-
- rchan_destroy_buf(rchan);
- rchan_free_id(rchan->id);
- relayfs_remove_file(rchan->dentry);
- clear_readers(rchan);
- kfree(rchan);
-
- return 0;
-}
-
-/**
- * rchan_get - decrement channel refcount, releasing it if 0
- * @rchan: the channel
- *
- * If the refcount reaches 0, the channel will be destroyed.
- */
-void
-rchan_put(struct rchan *rchan)
-{
- if (atomic_dec_and_test(&rchan->refcount))
- relay_release(rchan);
-}
-
-/**
- * relay_reserve - reserve a slot in the channel buffer
- * @rchan: the channel
- * @len: the length of the slot to reserve
- * @td: the time delta between buffer start and current write, or TSC
- * @err: receives the result flags
- * @interrupting: 1 if interrupting previous, used only in locking scheme
- *
- * Returns pointer to the beginning of the reserved slot, NULL if error.
- *
- * The errcode value contains the result flags and is an ORed combination
- * of the following:
- *
- * RELAY_BUFFER_SWITCH_NONE - no buffer switch occurred
- * RELAY_EVENT_DISCARD_NONE - event should not be discarded
- * RELAY_BUFFER_SWITCH - buffer switch occurred
- * RELAY_EVENT_DISCARD - event should be discarded (all buffers are full)
- * RELAY_EVENT_TOO_LONG - event won't fit into even an empty buffer
- *
- * buffer_start and buffer_end callbacks are triggered at this point
- * if applicable.
- */
-char *
-relay_reserve(struct rchan *rchan,
- u32 len,
- struct timeval *ts,
- u32 *td,
- int *err,
- int *interrupting)
-{
- if (rchan == NULL)
- return NULL;
-
- *interrupting = 0;
-
- return rchan->relay_ops->reserve(rchan, len, ts, td, err, interrupting);
-}
-
-
-/**
- * wakeup_readers - wake up VFS readers waiting on a channel
- * @private: the channel
- *
- * This is the work function used to defer reader waking. The
- * reason waking is deferred is that calling directly from commit
- * causes problems if you're writing from say the scheduler.
- */
-static void
-wakeup_readers(void *private)
-{
- struct rchan *rchan = (struct rchan *)private;
-
- wake_up_interruptible(&rchan->read_wait);
-}
-
-
-/**
- * relay_commit - commit a reserved slot in the buffer
- * @rchan: the channel
- * @from: commit the length starting here
- * @len: length committed
- * @interrupting: 1 if interrupting previous, used only in locking scheme
- *
- * After the write into the reserved buffer has been complted, this
- * function must be called in order for the relay to determine whether
- * buffers are complete and to wake up VFS readers.
- *
- * delivery callback is triggered at this point if applicable.
- */
-void
-relay_commit(struct rchan *rchan,
- char *from,
- u32 len,
- int reserve_code,
- int interrupting)
-{
- int deliver;
-
- if (rchan == NULL)
- return;
-
- deliver = packet_delivery(rchan) ||
- (reserve_code & RELAY_BUFFER_SWITCH);
-
- rchan->relay_ops->commit(rchan, from, len, deliver, interrupting);
-
- /* The params are always the same, so no worry about re-queuing */
- if (deliver && waitqueue_active(&rchan->read_wait)) {
- PREPARE_WORK(&rchan->wake_readers, wakeup_readers, rchan);
- schedule_delayed_work(&rchan->wake_readers, 1);
- }
-}
-
-/**
- * relay_get_offset - get current and max channel buffer offsets
- * @rchan: the channel
- * @max_offset: maximum channel offset
- *
- * Returns the current and maximum channel buffer offsets.
- */
-u32
-relay_get_offset(struct rchan *rchan, u32 *max_offset)
-{
- return rchan->relay_ops->get_offset(rchan, max_offset);
-}
-
-/**
- * reset_index - try once to reset the current channel index
- * @rchan: the channel
- * @old_index: the index read before reset
- *
- * Attempts to reset the channel index to 0. It tries once, and
- * if it fails, returns negative, 0 otherwise.
- */
-int
-reset_index(struct rchan *rchan, u32 old_index)
-{
- return rchan->relay_ops->reset_index(rchan, old_index);
-}
-
-/*
- * close() vm_op implementation for relayfs file mapping.
- */
-static void
-relay_file_mmap_close(struct vm_area_struct *vma)
-{
- struct file *filp = vma->vm_file;
- struct rchan_reader *reader;
- struct rchan *rchan;
-
- reader = (struct rchan_reader *)filp->private_data;
- rchan = reader->rchan;
-
- atomic_dec(&rchan->mapped);
-
- rchan->callbacks->fileop_notify(reader->rchan->id, filp,
- RELAY_FILE_UNMAP);
-}
-
-/*
- * vm_ops for relay file mappings.
- */
-static struct vm_operations_struct relay_file_mmap_ops = {
- .close = relay_file_mmap_close
-};
-
-/* \begin{Code inspired from BTTV driver} */
-static inline unsigned long
-kvirt_to_pa(unsigned long adr)
-{
- unsigned long kva, ret;
-
- kva = (unsigned long) page_address(vmalloc_to_page((void *) adr));
- kva |= adr & (PAGE_SIZE - 1);
- ret = __pa(kva);
- return ret;
-}
-
-static int
-relay_mmap_region(struct vm_area_struct *vma,
- const char *adr,
- const char *start_pos,
- unsigned long size)
-{
- unsigned long start = (unsigned long) adr;
- unsigned long page, pos;
-
- pos = (unsigned long) start_pos;
-
- while (size > 0) {
- page = kvirt_to_pa(pos);
- if (remap_page_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
- return -EAGAIN;
- start += PAGE_SIZE;
- pos += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- return 0;
-}
-/* \end{Code inspired from BTTV driver} */
-
-/**
- * relay_mmap_buffer: - mmap buffer to process address space
- * @rchan_id: relay channel id
- * @vma: vm_area_struct describing memory to be mapped
- *
- * Returns:
- * 0 if ok
- * -EAGAIN, when remap failed
- * -EINVAL, invalid requested length
- *
- * Caller should already have grabbed mmap_sem.
- */
-int
-__relay_mmap_buffer(struct rchan *rchan,
- struct vm_area_struct *vma)
-{
- int err = 0;
- unsigned long length = vma->vm_end - vma->vm_start;
- struct file *filp = vma->vm_file;
-
- if (rchan == NULL) {
- err = -EBADF;
- goto exit;
- }
-
- if (rchan->init_buf) {
- err = -EPERM;
- goto exit;
- }
-
- if (length != (unsigned long)rchan->alloc_size) {
- err = -EINVAL;
- goto exit;
- }
-
- err = relay_mmap_region(vma,
- (char *)vma->vm_start,
- rchan->buf,
- rchan->alloc_size);
-
- if (err == 0) {
- vma->vm_ops = &relay_file_mmap_ops;
- err = rchan->callbacks->fileop_notify(rchan->id, filp,
- RELAY_FILE_MAP);
- if (err == 0)
- atomic_inc(&rchan->mapped);
- }
-exit:
- return err;
-}
-
-/*
- * High-level relayfs kernel API. See Documentation/filesystems/relafys.txt.
- */
-
-/*
- * rchan_callback implementations defining default channel behavior. Used
- * in place of corresponding NULL values in client callback struct.
- */
-
-/*
- * buffer_end() default callback. Does nothing.
- */
-static int
-buffer_end_default_callback(int rchan_id,
- char *current_write_pos,
- char *end_of_buffer,
- struct timeval end_time,
- u32 end_tsc,
- int using_tsc)
-{
- return 0;
-}
-
-/*
- * buffer_start() default callback. Does nothing.
- */
-static int
-buffer_start_default_callback(int rchan_id,
- char *current_write_pos,
- u32 buffer_id,
- struct timeval start_time,
- u32 start_tsc,
- int using_tsc)
-{
- return 0;
-}
-
-/*
- * deliver() default callback. Does nothing.
- */
-static void
-deliver_default_callback(int rchan_id, char *from, u32 len)
-{
-}
-
-/*
- * user_deliver() default callback. Does nothing.
- */
-static void
-user_deliver_default_callback(int rchan_id, char *from, u32 len)
-{
-}
-
-/*
- * needs_resize() default callback. Does nothing.
- */
-static void
-needs_resize_default_callback(int rchan_id,
- int resize_type,
- u32 suggested_buf_size,
- u32 suggested_n_bufs)
-{
-}
-
-/*
- * fileop_notify() default callback. Does nothing.
- */
-static int
-fileop_notify_default_callback(int rchan_id,
- struct file *filp,
- enum relay_fileop fileop)
-{
- return 0;
-}
-
-/*
- * ioctl() default callback. Does nothing.
- */
-static int
-ioctl_default_callback(int rchan_id,
- unsigned int cmd,
- unsigned long arg)
-{
- return 0;
-}
-
-/* relay channel default callbacks */
-static struct rchan_callbacks default_channel_callbacks = {
- .buffer_start = buffer_start_default_callback,
- .buffer_end = buffer_end_default_callback,
- .deliver = deliver_default_callback,
- .user_deliver = user_deliver_default_callback,
- .needs_resize = needs_resize_default_callback,
- .fileop_notify = fileop_notify_default_callback,
- .ioctl = ioctl_default_callback,
-};
-
-/**
- * check_attribute_flags - check sanity of channel attributes
- * @flags: channel attributes
- * @resizeable: 1 if true
- *
- * Returns 0 if successful, negative otherwise.
- */
-static int
-check_attribute_flags(u32 *attribute_flags, int resizeable)
-{
- u32 flags = *attribute_flags;
-
- if (!(flags & RELAY_DELIVERY_BULK) && !(flags & RELAY_DELIVERY_PACKET))
- return -EINVAL; /* Delivery mode must be specified */
-
- if (!(flags & RELAY_USAGE_SMP) && !(flags & RELAY_USAGE_GLOBAL))
- return -EINVAL; /* Usage must be specified */
-
- if (resizeable) { /* Resizeable can never be continuous */
- *attribute_flags &= ~RELAY_MODE_CONTINUOUS;
- *attribute_flags |= RELAY_MODE_NO_OVERWRITE;
- }
-
- if ((flags & RELAY_MODE_CONTINUOUS) &&
- (flags & RELAY_MODE_NO_OVERWRITE))
- return -EINVAL; /* Can't have it both ways */
-
- if (!(flags & RELAY_MODE_CONTINUOUS) &&
- !(flags & RELAY_MODE_NO_OVERWRITE))
- *attribute_flags |= RELAY_MODE_CONTINUOUS; /* Default to continuous */
-
- if (!(flags & RELAY_SCHEME_ANY))
- return -EINVAL; /* One or both must be specified */
- else if (flags & RELAY_SCHEME_LOCKLESS) {
- if (have_cmpxchg())
- *attribute_flags &= ~RELAY_SCHEME_LOCKING;
- else if (flags & RELAY_SCHEME_LOCKING)
- *attribute_flags &= ~RELAY_SCHEME_LOCKLESS;
- else
- return -EINVAL; /* Locking scheme not an alternative */
- }
-
- if (!(flags & RELAY_TIMESTAMP_ANY))
- return -EINVAL; /* One or both must be specified */
- else if (flags & RELAY_TIMESTAMP_TSC) {
- if (have_tsc())
- *attribute_flags &= ~RELAY_TIMESTAMP_GETTIMEOFDAY;
- else if (flags & RELAY_TIMESTAMP_GETTIMEOFDAY)
- *attribute_flags &= ~RELAY_TIMESTAMP_TSC;
- else
- return -EINVAL; /* gettimeofday not an alternative */
- }
-
- return 0;
-}
-
-/*
- * High-level API functions.
- */
-
-/**
- * __relay_reset - internal reset function
- * @rchan: the channel
- * @init: 1 if this is a first-time channel initialization
- *
- * See relay_reset for description of effect.
- */
-void
-__relay_reset(struct rchan *rchan, int init)
-{
- int i;
-
- if (init) {
- rchan->version = RELAYFS_CHANNEL_VERSION;
- init_MUTEX(&rchan->resize_sem);
- init_waitqueue_head(&rchan->read_wait);
- init_waitqueue_head(&rchan->write_wait);
- atomic_set(&rchan->refcount, 0);
- INIT_LIST_HEAD(&rchan->open_readers);
- rchan->open_readers_lock = RW_LOCK_UNLOCKED;
- }
-
- rchan->buf_id = rchan->buf_idx = 0;
- atomic_set(&rchan->suspended, 0);
- atomic_set(&rchan->mapped, 0);
- rchan->half_switch = 0;
- rchan->bufs_produced = 0;
- rchan->bufs_consumed = 0;
- rchan->bytes_consumed = 0;
- rchan->initialized = 0;
- rchan->finalized = 0;
- rchan->resize_min = rchan->resize_max = 0;
- rchan->resizing = 0;
- rchan->replace_buffer = 0;
- rchan->resize_buf = NULL;
- rchan->resize_buf_size = 0;
- rchan->resize_alloc_size = 0;
- rchan->resize_n_bufs = 0;
- rchan->resize_err = 0;
- rchan->resize_failures = 0;
- rchan->resize_order = 0;
-
- rchan->expand_page_array = NULL;
- rchan->expand_page_count = 0;
- rchan->shrink_page_array = NULL;
- rchan->shrink_page_count = 0;
- rchan->resize_page_array = NULL;
- rchan->resize_page_count = 0;
- rchan->old_buf_page_array = NULL;
- rchan->expand_buf_id = 0;
-
- INIT_WORK(&rchan->wake_readers, NULL, NULL);
- INIT_WORK(&rchan->wake_writers, NULL, NULL);
-
- for (i = 0; i < RELAY_MAX_BUFS; i++)
- rchan->unused_bytes[i] = 0;
-
- rchan->relay_ops->reset(rchan, init);
-}
-
-/**
- * relay_reset - reset the channel
- * @rchan: the channel
- *
- * Returns 0 if successful, negative if not.
- *
- * This has the effect of erasing all data from the buffer and
- * restarting the channel in its initial state. The buffer itself
- * is not freed, so any mappings are still in effect.
- *
- * NOTE: Care should be taken that the channnel isn't actually
- * being used by anything when this call is made.
- */
-int
-relay_reset(int rchan_id)
-{
- struct rchan *rchan;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- __relay_reset(rchan, 0);
- update_readers_consumed(rchan, 0, 0);
-
- rchan_put(rchan);
-
- return 0;
-}
-
-/**
- * check_init_buf - check the sanity of init_buf, if present
- * @init_buf: the initbuf
- * @init_buf_size: the total initbuf size
- * @bufsize: the channel's sub-buffer size
- * @nbufs: the number of sub-buffers in the channel
- *
- * Returns 0 if ok, negative otherwise.
- */
-static int
-check_init_buf(char *init_buf, u32 init_buf_size, u32 bufsize, u32 nbufs)
-{
- int err = 0;
-
- if (init_buf && nbufs == 1) /* 1 sub-buffer makes no sense */
- err = -EINVAL;
-
- if (init_buf && (bufsize * nbufs != init_buf_size))
- err = -EINVAL;
-
- return err;
-}
-
-/**
- * rchan_create_buf - allocate the initial channel buffer
- * @rchan: the channel
- * @size_alloc: the total size of the channel buffer
- *
- * Returns 0 if successful, negative otherwise.
- */
-static inline int
-rchan_create_buf(struct rchan *rchan, int size_alloc)
-{
- struct page **page_array;
- int page_count;
-
- if ((rchan->buf = (char *)alloc_rchan_buf(size_alloc, &page_array, &page_count)) == NULL) {
- rchan->buf_page_array = NULL;
- rchan->buf_page_count = 0;
- return -ENOMEM;
- }
-
- rchan->buf_page_array = page_array;
- rchan->buf_page_count = page_count;
-
- return 0;
-}
-
-/**
- * rchan_create - allocate and initialize a channel, including buffer
- * @chanpath: path specifying the relayfs channel file to create
- * @bufsize: the size of the sub-buffers within the channel buffer
- * @nbufs: the number of sub-buffers within the channel buffer
- * @rchan_flags: flags specifying buffer attributes
- * @err: err code
- *
- * Returns channel if successful, NULL otherwise, err receives errcode.
- *
- * Allocates a struct rchan representing a relay channel, according
- * to the attributes passed in via rchan_flags. Does some basic sanity
- * checking but doesn't try to do anything smart. In particular, the
- * number of buffers must be a power of 2, and if the lockless scheme
- * is being used, the sub-buffer size must also be a power of 2. The
- * locking scheme can use buffers of any size.
- */
-static struct rchan *
-rchan_create(const char *chanpath,
- int bufsize,
- int nbufs,
- u32 rchan_flags,
- char *init_buf,
- u32 init_buf_size,
- int *err)
-{
- int size_alloc;
- struct rchan *rchan = NULL;
-
- *err = 0;
-
- rchan = (struct rchan *)kmalloc(sizeof(struct rchan), GFP_KERNEL);
- if (rchan == NULL) {
- *err = -ENOMEM;
- return NULL;
- }
- rchan->buf = rchan->init_buf = NULL;
-
- *err = check_init_buf(init_buf, init_buf_size, bufsize, nbufs);
- if (*err)
- goto exit;
-
- if (nbufs == 1 && bufsize) {
- rchan->n_bufs = nbufs;
- rchan->buf_size = bufsize;
- size_alloc = bufsize;
- goto alloc;
- }
-
- if (bufsize <= 0 ||
- (rchan_flags & RELAY_SCHEME_LOCKLESS && hweight32(bufsize) != 1) ||
- hweight32(nbufs) != 1 ||
- nbufs < RELAY_MIN_BUFS ||
- nbufs > RELAY_MAX_BUFS) {
- *err = -EINVAL;
- goto exit;
- }
-
- size_alloc = FIX_SIZE(bufsize * nbufs);
- if (size_alloc > RELAY_MAX_BUF_SIZE) {
- *err = -EINVAL;
- goto exit;
- }
- rchan->n_bufs = nbufs;
- rchan->buf_size = bufsize;
-
- if (rchan_flags & RELAY_SCHEME_LOCKLESS) {
- offset_bits(rchan) = ffs(bufsize) - 1;
- offset_mask(rchan) = RELAY_BUF_OFFSET_MASK(offset_bits(rchan));
- bufno_bits(rchan) = ffs(nbufs) - 1;
- }
-alloc:
- if (rchan_alloc_id(rchan) == -1) {
- *err = -ENOMEM;
- goto exit;
- }
-
- if (init_buf == NULL) {
- *err = rchan_create_buf(rchan, size_alloc);
- if (*err) {
- rchan_free_id(rchan->id);
- goto exit;
- }
- } else
- rchan->buf = rchan->init_buf = init_buf;
-
- rchan->alloc_size = size_alloc;
-
- if (rchan_flags & RELAY_SCHEME_LOCKLESS)
- rchan->relay_ops = &lockless_ops;
- else
- rchan->relay_ops = &locking_ops;
-
-exit:
- if (*err) {
- kfree(rchan);
- rchan = NULL;
- }
-
- return rchan;
-}
-
-
-static char tmpname[NAME_MAX];
-
-/**
- * rchan_create_dir - create directory for file
- * @chanpath: path to file, including filename
- * @residual: filename remaining after parse
- * @topdir: the directory filename should be created in
- *
- * Returns 0 if successful, negative otherwise.
- *
- * Inspired by xlate_proc_name() in procfs. Given a file path which
- * includes the filename, creates any and all directories necessary
- * to create the file.
- */
-static int
-rchan_create_dir(const char * chanpath,
- const char **residual,
- struct dentry **topdir)
-{
- const char *cp = chanpath, *next;
- struct dentry *parent = NULL;
- int len, err = 0;
-
- while (1) {
- next = strchr(cp, '/');
- if (!next)
- break;
-
- len = next - cp;
-
- strncpy(tmpname, cp, len);
- tmpname[len] = '\0';
- err = relayfs_create_dir(tmpname, parent, &parent);
- if (err && (err != -EEXIST))
- return err;
- cp += len + 1;
- }
-
- *residual = cp;
- *topdir = parent;
-
- return err;
-}
-
-/**
- * rchan_create_file - create file, including parent directories
- * @chanpath: path to file, including filename
- * @dentry: result dentry
- * @data: data to associate with the file
- *
- * Returns 0 if successful, negative otherwise.
- */
-static int
-rchan_create_file(const char * chanpath,
- struct dentry **dentry,
- struct rchan * data,
- int mode)
-{
- int err;
- const char * fname;
- struct dentry *topdir;
-
- err = rchan_create_dir(chanpath, &fname, &topdir);
- if (err && (err != -EEXIST))
- return err;
-
- err = relayfs_create_file(fname, topdir, dentry, (void *)data, mode);
-
- return err;
-}
-
-/**
- * relay_open - create a new file/channel buffer in relayfs
- * @chanpath: name of file to create, including path
- * @bufsize: size of sub-buffers
- * @nbufs: number of sub-buffers
- * @flags: channel attributes
- * @callbacks: client callback functions
- * @start_reserve: number of bytes to reserve at start of each sub-buffer
- * @end_reserve: number of bytes to reserve at end of each sub-buffer
- * @rchan_start_reserve: additional reserve at start of first sub-buffer
- * @resize_min: minimum total buffer size, if set
- * @resize_max: maximum total buffer size, if set
- * @mode: the perms to be given to the relayfs file, 0 to accept defaults
- * @init_buf: initial memory buffer to start out with, NULL if N/A
- * @init_buf_size: initial memory buffer size to start out with, 0 if N/A
- *
- * Returns channel id if successful, negative otherwise.
- *
- * Creates a relay channel using the sizes and attributes specified.
- * The default permissions, used if mode == 0 are S_IRUSR | S_IWUSR. See
- * Documentation/filesystems/relayfs.txt for details.
- */
-int
-relay_open(const char *chanpath,
- int bufsize,
- int nbufs,
- u32 flags,
- struct rchan_callbacks *channel_callbacks,
- u32 start_reserve,
- u32 end_reserve,
- u32 rchan_start_reserve,
- u32 resize_min,
- u32 resize_max,
- int mode,
- char *init_buf,
- u32 init_buf_size)
-{
- int err;
- struct rchan *rchan;
- struct dentry *dentry;
- struct rchan_callbacks *callbacks = NULL;
-
- if (chanpath == NULL)
- return -EINVAL;
-
- if (nbufs != 1) {
- err = check_attribute_flags(&flags, resize_min ? 1 : 0);
- if (err)
- return err;
- }
-
- rchan = rchan_create(chanpath, bufsize, nbufs, flags, init_buf, init_buf_size, &err);
-
- if (err < 0)
- return err;
-
- /* Create file in fs */
- if ((err = rchan_create_file(chanpath, &dentry, rchan, mode)) < 0) {
- rchan_destroy_buf(rchan);
- rchan_free_id(rchan->id);
- kfree(rchan);
- return err;
- }
-
- rchan->dentry = dentry;
-
- if (channel_callbacks == NULL)
- callbacks = &default_channel_callbacks;
- else
- callbacks = channel_callbacks;
-
- if (callbacks->buffer_end == NULL)
- callbacks->buffer_end = buffer_end_default_callback;
- if (callbacks->buffer_start == NULL)
- callbacks->buffer_start = buffer_start_default_callback;
- if (callbacks->deliver == NULL)
- callbacks->deliver = deliver_default_callback;
- if (callbacks->user_deliver == NULL)
- callbacks->user_deliver = user_deliver_default_callback;
- if (callbacks->needs_resize == NULL)
- callbacks->needs_resize = needs_resize_default_callback;
- if (callbacks->fileop_notify == NULL)
- callbacks->fileop_notify = fileop_notify_default_callback;
- if (callbacks->ioctl == NULL)
- callbacks->ioctl = ioctl_default_callback;
- rchan->callbacks = callbacks;
-
- /* Just to let the client know the sizes used */
- rchan->callbacks->needs_resize(rchan->id,
- RELAY_RESIZE_REPLACED,
- rchan->buf_size,
- rchan->n_bufs);
-
- rchan->flags = flags;
- rchan->start_reserve = start_reserve;
- rchan->end_reserve = end_reserve;
- rchan->rchan_start_reserve = rchan_start_reserve;
-
- __relay_reset(rchan, 1);
-
- if (resize_min > 0 && resize_max > 0 &&
- resize_max < RELAY_MAX_TOTAL_BUF_SIZE) {
- rchan->resize_min = resize_min;
- rchan->resize_max = resize_max;
- init_shrink_timer(rchan);
- }
-
- rchan_get(rchan->id);
-
- return rchan->id;
-}
-
-/**
- * relay_discard_init_buf - alloc channel buffer and copy init_buf into it
- * @rchan_id: the channel id
- *
- * Returns 0 if successful, negative otherwise.
- *
- * NOTE: May sleep. Should also be called only when the channel isn't
- * actively being written into.
- */
-int
-relay_discard_init_buf(int rchan_id)
-{
- struct rchan *rchan;
- int err = 0;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- if (rchan->init_buf == NULL) {
- err = -EINVAL;
- goto out;
- }
-
- err = rchan_create_buf(rchan, rchan->alloc_size);
- if (err)
- goto out;
-
- memcpy(rchan->buf, rchan->init_buf, rchan->n_bufs * rchan->buf_size);
- rchan->init_buf = NULL;
-out:
- rchan_put(rchan);
-
- return err;
-}
-
-/**
- * relay_finalize - perform end-of-buffer processing for last buffer
- * @rchan_id: the channel id
- * @releasing: true if called when releasing file
- *
- * Returns 0 if successful, negative otherwise.
- */
-static int
-relay_finalize(int rchan_id)
-{
- struct rchan *rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- if (rchan->finalized == 0) {
- rchan->relay_ops->finalize(rchan);
- rchan->finalized = 1;
- }
-
- if (waitqueue_active(&rchan->read_wait)) {
- PREPARE_WORK(&rchan->wake_readers, wakeup_readers, rchan);
- schedule_delayed_work(&rchan->wake_readers, 1);
- }
-
- rchan_put(rchan);
-
- return 0;
-}
-
-/**
- * restore_callbacks - restore default channel callbacks
- * @rchan: the channel
- *
- * Restore callbacks to the default versions.
- */
-static inline void
-restore_callbacks(struct rchan *rchan)
-{
- if (rchan->callbacks != &default_channel_callbacks)
- rchan->callbacks = &default_channel_callbacks;
-}
-
-/**
- * relay_close - close the channel
- * @rchan_id: relay channel id
- *
- * Finalizes the last sub-buffer and marks the channel as finalized.
- * The channel buffer and channel data structure are then freed
- * automatically when the last reference to the channel is given up.
- */
-int
-relay_close(int rchan_id)
-{
- int err;
- struct rchan *rchan;
-
- if ((rchan_id < 0) || (rchan_id >= RELAY_MAX_CHANNELS))
- return -EBADF;
-
- err = relay_finalize(rchan_id);
-
- if (!err) {
- read_lock(&rchan_table_lock);
- rchan = rchan_table[rchan_id];
- read_unlock(&rchan_table_lock);
-
- if (rchan) {
- restore_callbacks(rchan);
- if (rchan->resize_min)
- del_timer(&rchan->shrink_timer);
- rchan_put(rchan);
- }
- }
-
- return err;
-}
-
-/**
- * relay_write - reserve a slot in the channel and write data into it
- * @rchan_id: relay channel id
- * @data_ptr: data to be written into reserved slot
- * @count: number of bytes to write
- * @td_offset: optional offset where time delta should be written
- * @wrote_pos: optional ptr returning buf pos written to, ignored if NULL
- *
- * Returns the number of bytes written, 0 or negative on failure.
- *
- * Reserves space in the channel and writes count bytes of data_ptr
- * to it. Automatically performs any necessary locking, depending
- * on the scheme and SMP usage in effect (no locking is done for the
- * lockless scheme regardless of usage).
- *
- * If td_offset is >= 0, the internal time delta calculated when
- * slot was reserved will be written at that offset.
- *
- * If wrote_pos is non-NULL, it will receive the location the data
- * was written to, which may be needed for some applications but is not
- * normally interesting.
- */
-int
-relay_write(int rchan_id,
- const void *data_ptr,
- size_t count,
- int td_offset,
- void **wrote_pos)
-{
- unsigned long flags;
- char *reserved, *write_pos;
- int bytes_written = 0;
- int reserve_code, interrupting;
- struct timeval ts;
- u32 td;
- struct rchan *rchan;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- relay_lock_channel(rchan, flags); /* nop for lockless */
-
- write_pos = reserved = relay_reserve(rchan, count, &ts, &td,
- &reserve_code, &interrupting);
-
- if (reserved != NULL) {
- relay_write_direct(write_pos, data_ptr, count);
- if ((td_offset >= 0) && (td_offset < count - sizeof(td)))
- *((u32 *)(reserved + td_offset)) = td;
- bytes_written = count;
- } else if (reserve_code == RELAY_WRITE_TOO_LONG)
- bytes_written = -EINVAL;
-
- if (bytes_written > 0)
- relay_commit(rchan, reserved, bytes_written, reserve_code, interrupting);
-
- relay_unlock_channel(rchan, flags); /* nop for lockless */
-
- rchan_put(rchan);
-
- if (wrote_pos)
- *wrote_pos = reserved;
-
- return bytes_written;
-}
-
-/**
- * wakeup_writers - wake up VFS writers waiting on a channel
- * @private: the channel
- *
- * This is the work function used to defer writer waking. The
- * reason waking is deferred is that calling directly from
- * buffers_consumed causes problems if you're writing from say
- * the scheduler.
- */
-static void
-wakeup_writers(void *private)
-{
- struct rchan *rchan = (struct rchan *)private;
-
- wake_up_interruptible(&rchan->write_wait);
-}
-
-
-/**
- * __relay_buffers_consumed - internal version of relay_buffers_consumed
- * @rchan: the relay channel
- * @bufs_consumed: number of buffers to add to current count for channel
- *
- * Internal - updates the channel's consumed buffer count.
- */
-static void
-__relay_buffers_consumed(struct rchan *rchan, u32 bufs_consumed)
-{
- rchan->bufs_consumed += bufs_consumed;
-
- if (rchan->bufs_consumed > rchan->bufs_produced)
- rchan->bufs_consumed = rchan->bufs_produced;
-
- atomic_set(&rchan->suspended, 0);
-
- PREPARE_WORK(&rchan->wake_writers, wakeup_writers, rchan);
- schedule_delayed_work(&rchan->wake_writers, 1);
-}
-
-/**
- * __reader_buffers_consumed - update reader/channel consumed buffer count
- * @reader: channel reader
- * @bufs_consumed: number of buffers to add to current count for channel
- *
- * Internal - updates the reader's consumed buffer count. If the reader's
- * resulting total is greater than the channel's, update the channel's.
-*/
-static void
-__reader_buffers_consumed(struct rchan_reader *reader, u32 bufs_consumed)
-{
- reader->bufs_consumed += bufs_consumed;
-
- if (reader->bufs_consumed > reader->rchan->bufs_consumed)
- __relay_buffers_consumed(reader->rchan, bufs_consumed);
-}
-
-/**
- * relay_buffers_consumed - add to the # buffers consumed for the channel
- * @reader: channel reader
- * @bufs_consumed: number of buffers to add to current count for channel
- *
- * Adds to the channel's consumed buffer count. buffers_consumed should
- * be the number of buffers newly consumed, not the total number consumed.
- *
- * NOTE: kernel clients don't need to call this function if the reader
- * is auto-consuming or the channel is MODE_CONTINUOUS.
- */
-void
-relay_buffers_consumed(struct rchan_reader *reader, u32 bufs_consumed)
-{
- if (reader && reader->rchan)
- __reader_buffers_consumed(reader, bufs_consumed);
-}
-
-/**
- * __relay_bytes_consumed - internal version of relay_bytes_consumed
- * @rchan: the relay channel
- * @bytes_consumed: number of bytes to add to current count for channel
- * @read_offset: where the bytes were consumed from
- *
- * Internal - updates the channel's consumed count.
-*/
-static void
-__relay_bytes_consumed(struct rchan *rchan, u32 bytes_consumed, u32 read_offset)
-{
- u32 consuming_idx;
- u32 unused;
-
- consuming_idx = read_offset / rchan->buf_size;
-
- if (consuming_idx >= rchan->n_bufs)
- consuming_idx = rchan->n_bufs - 1;
- rchan->bytes_consumed += bytes_consumed;
-
- unused = rchan->unused_bytes[consuming_idx];
-
- if (rchan->bytes_consumed + unused >= rchan->buf_size) {
- __relay_buffers_consumed(rchan, 1);
- rchan->bytes_consumed = 0;
- }
-}
-
-/**
- * __reader_bytes_consumed - update reader/channel consumed count
- * @reader: channel reader
- * @bytes_consumed: number of bytes to add to current count for channel
- * @read_offset: where the bytes were consumed from
- *
- * Internal - updates the reader's consumed count. If the reader's
- * resulting total is greater than the channel's, update the channel's.
-*/
-static void
-__reader_bytes_consumed(struct rchan_reader *reader, u32 bytes_consumed, u32 read_offset)
-{
- u32 consuming_idx;
- u32 unused;
-
- consuming_idx = read_offset / reader->rchan->buf_size;
-
- if (consuming_idx >= reader->rchan->n_bufs)
- consuming_idx = reader->rchan->n_bufs - 1;
-
- reader->bytes_consumed += bytes_consumed;
-
- unused = reader->rchan->unused_bytes[consuming_idx];
-
- if (reader->bytes_consumed + unused >= reader->rchan->buf_size) {
- reader->bufs_consumed++;
- reader->bytes_consumed = 0;
- }
-
- if ((reader->bufs_consumed > reader->rchan->bufs_consumed) ||
- ((reader->bufs_consumed == reader->rchan->bufs_consumed) &&
- (reader->bytes_consumed > reader->rchan->bytes_consumed)))
- __relay_bytes_consumed(reader->rchan, bytes_consumed, read_offset);
-}
-
-/**
- * relay_bytes_consumed - add to the # bytes consumed for the channel
- * @reader: channel reader
- * @bytes_consumed: number of bytes to add to current count for channel
- * @read_offset: where the bytes were consumed from
- *
- * Adds to the channel's consumed count. bytes_consumed should be the
- * number of bytes actually read e.g. return value of relay_read() and
- * the read_offset should be the actual offset the bytes were read from
- * e.g. the actual_read_offset set by relay_read(). See
- * Documentation/filesystems/relayfs.txt for more details.
- *
- * NOTE: kernel clients don't need to call this function if the reader
- * is auto-consuming or the channel is MODE_CONTINUOUS.
- */
-void
-relay_bytes_consumed(struct rchan_reader *reader, u32 bytes_consumed, u32 read_offset)
-{
- if (reader && reader->rchan)
- __reader_bytes_consumed(reader, bytes_consumed, read_offset);
-}
-
-/**
- * update_readers_consumed - apply offset change to reader
- * @rchan: the channel
- *
- * Apply the consumed counts to all readers open on the channel.
- */
-void
-update_readers_consumed(struct rchan *rchan, u32 bufs_consumed, u32 bytes_consumed)
-{
- struct list_head *p;
- struct rchan_reader *reader;
-
- read_lock(&rchan->open_readers_lock);
- list_for_each(p, &rchan->open_readers) {
- reader = list_entry(p, struct rchan_reader, list);
- reader->bufs_consumed = bufs_consumed;
- reader->bytes_consumed = bytes_consumed;
- if (reader->vfs_reader)
- reader->pos.file->f_pos = 0;
- else
- reader->pos.f_pos = 0;
- reader->offset_changed = 1;
- }
- read_unlock(&rchan->open_readers_lock);
-}
-
-/**
- * do_read - utility function to do the actual read to user
- * @rchan: the channel
- * @buf: user buf to read into, NULL if just getting info
- * @count: bytes requested
- * @read_offset: offset into channel
- * @new_offset: new offset into channel after read
- * @actual_read_offset: read offset actually used
- *
- * Returns the number of bytes read, 0 if none.
- */
-static ssize_t
-do_read(struct rchan *rchan, char *buf, size_t count, u32 read_offset, u32 *new_offset, u32 *actual_read_offset)
-{
- u32 read_bufno, cur_bufno;
- u32 avail_offset, cur_idx, max_offset, buf_end_offset;
- u32 avail_count, buf_size;
- int unused_bytes = 0;
- size_t read_count = 0;
- u32 last_buf_byte_offset;
-
- *actual_read_offset = read_offset;
-
- buf_size = rchan->buf_size;
- if (unlikely(!buf_size)) BUG();
-
- read_bufno = read_offset / buf_size;
- if (unlikely(read_bufno >= RELAY_MAX_BUFS)) BUG();
- unused_bytes = rchan->unused_bytes[read_bufno];
-
- avail_offset = cur_idx = relay_get_offset(rchan, &max_offset);
-
- if (cur_idx == read_offset) {
- if (atomic_read(&rchan->suspended) == 1) {
- read_offset += 1;
- if (read_offset >= max_offset)
- read_offset = 0;
- *actual_read_offset = read_offset;
- } else {
- *new_offset = read_offset;
- return 0;
- }
- } else {
- last_buf_byte_offset = (read_bufno + 1) * buf_size - 1;
- if (read_offset == last_buf_byte_offset) {
- if (unused_bytes != 1) {
- read_offset += 1;
- if (read_offset >= max_offset)
- read_offset = 0;
- *actual_read_offset = read_offset;
- }
- }
- }
-
- read_bufno = read_offset / buf_size;
- if (unlikely(read_bufno >= RELAY_MAX_BUFS)) BUG();
- unused_bytes = rchan->unused_bytes[read_bufno];
-
- cur_bufno = cur_idx / buf_size;
-
- buf_end_offset = (read_bufno + 1) * buf_size - unused_bytes;
- if (avail_offset > buf_end_offset)
- avail_offset = buf_end_offset;
- else if (avail_offset < read_offset)
- avail_offset = buf_end_offset;
- avail_count = avail_offset - read_offset;
- read_count = avail_count >= count ? count : avail_count;
-
- if (read_count && buf != NULL)
- if (copy_to_user(buf, rchan->buf + read_offset, read_count))
- return -EFAULT;
-
- if (read_bufno == cur_bufno)
- if (read_count && (read_offset + read_count >= buf_end_offset) && (read_offset + read_count <= cur_idx)) {
- *new_offset = cur_idx;
- return read_count;
- }
-
- if (read_offset + read_count + unused_bytes > max_offset)
- *new_offset = 0;
- else if (read_offset + read_count >= buf_end_offset)
- *new_offset = read_offset + read_count + unused_bytes;
- else
- *new_offset = read_offset + read_count;
-
- return read_count;
-}
-
-/**
- * __relay_read - read bytes from channel, relative to current reader pos
- * @reader: channel reader
- * @buf: user buf to read into, NULL if just getting info
- * @count: bytes requested
- * @read_offset: offset into channel
- * @new_offset: new offset into channel after read
- * @actual_read_offset: read offset actually used
- * @wait: if non-zero, wait for something to read
- *
- * Internal - see relay_read() for details.
- *
- * Returns the number of bytes read, 0 if none, negative on failure.
- */
-static ssize_t
-__relay_read(struct rchan_reader *reader, char *buf, size_t count, u32 read_offset, u32 *new_offset, u32 *actual_read_offset, int wait)
-{
- int err = 0;
- size_t read_count = 0;
- struct rchan *rchan = reader->rchan;
-
- if (!wait && !rchan->initialized)
- return -EAGAIN;
-
- if (using_lockless(rchan))
- read_offset &= idx_mask(rchan);
-
- if (read_offset >= rchan->n_bufs * rchan->buf_size) {
- *new_offset = 0;
- if (!wait)
- return -EAGAIN;
- else
- return -EINTR;
- }
-
- if (buf != NULL && wait) {
- err = wait_event_interruptible(rchan->read_wait,
- ((rchan->finalized == 1) ||
- (atomic_read(&rchan->suspended) == 1) ||
- (relay_get_offset(rchan, NULL) != read_offset)));
-
- if (rchan->finalized)
- return 0;
-
- if (reader->offset_changed) {
- reader->offset_changed = 0;
- return -EINTR;
- }
-
- if (err)
- return err;
- }
-
- read_count = do_read(rchan, buf, count, read_offset, new_offset, actual_read_offset);
-
- if (read_count < 0)
- err = read_count;
-
- if (err)
- return err;
- else
- return read_count;
-}
-
-/**
- * relay_read - read bytes from channel, relative to current reader pos
- * @reader: channel reader
- * @buf: user buf to read into, NULL if just getting info
- * @count: bytes requested
- * @wait: if non-zero, wait for something to read
- * @actual_read_offset: set read offset actually used, must not be NULL
- *
- * Reads count bytes from the channel, or as much as is available within
- * the sub-buffer currently being read. The read offset that will be
- * read from is the position contained within the reader object. If the
- * wait flag is set, buf is non-NULL, and there is nothing available,
- * it will wait until there is. If the wait flag is 0 and there is
- * nothing available, -EAGAIN is returned. If buf is NULL, the value
- * returned is the number of bytes that would have been read.
- * actual_read_offset is the value that should be passed as the read
- * offset to relay_bytes_consumed, needed only if the reader is not
- * auto-consuming and the channel is MODE_NO_OVERWRITE, but in any case,
- * it must not be NULL. See Documentation/filesystems/relayfs.txt for
- * more details.
- */
-ssize_t
-relay_read(struct rchan_reader *reader, char *buf, size_t count, int wait, u32 *actual_read_offset)
-{
- u32 new_offset;
- u32 read_offset;
- ssize_t read_count;
-
- if (reader == NULL || reader->rchan == NULL)
- return -EBADF;
-
- if (actual_read_offset == NULL)
- return -EINVAL;
-
- if (reader->vfs_reader)
- read_offset = (u32)(reader->pos.file->f_pos);
- else
- read_offset = reader->pos.f_pos;
- *actual_read_offset = read_offset;
-
- read_count = __relay_read(reader, buf, count, read_offset,
- &new_offset, actual_read_offset, wait);
-
- if (read_count < 0)
- return read_count;
-
- if (reader->vfs_reader)
- reader->pos.file->f_pos = new_offset;
- else
- reader->pos.f_pos = new_offset;
-
- if (reader->auto_consume && ((read_count) || (new_offset != read_offset)))
- __reader_bytes_consumed(reader, read_count, *actual_read_offset);
-
- if (read_count == 0 && !wait)
- return -EAGAIN;
-
- return read_count;
-}
-
-/**
- * relay_bytes_avail - number of bytes available in current sub-buffer
- * @reader: channel reader
- *
- * Returns the number of bytes available relative to the reader's
- * current read position within the corresponding sub-buffer, 0 if
- * there is nothing available. See Documentation/filesystems/relayfs.txt
- * for more details.
- */
-ssize_t
-relay_bytes_avail(struct rchan_reader *reader)
-{
- u32 f_pos;
- u32 new_offset;
- u32 actual_read_offset;
- ssize_t bytes_read;
-
- if (reader == NULL || reader->rchan == NULL)
- return -EBADF;
-
- if (reader->vfs_reader)
- f_pos = (u32)reader->pos.file->f_pos;
- else
- f_pos = reader->pos.f_pos;
- new_offset = f_pos;
-
- bytes_read = __relay_read(reader, NULL, reader->rchan->buf_size,
- f_pos, &new_offset, &actual_read_offset, 0);
-
- if ((new_offset != f_pos) &&
- ((bytes_read == -EINTR) || (bytes_read == 0)))
- bytes_read = -EAGAIN;
- else if ((bytes_read < 0) && (bytes_read != -EAGAIN))
- bytes_read = 0;
-
- return bytes_read;
-}
-
-/**
- * rchan_empty - boolean, is the channel empty wrt reader?
- * @reader: channel reader
- *
- * Returns 1 if the channel is empty, 0 otherwise.
- */
-int
-rchan_empty(struct rchan_reader *reader)
-{
- ssize_t avail_count;
- u32 buffers_ready;
- struct rchan *rchan = reader->rchan;
- u32 cur_idx, curbuf_bytes;
- int mapped;
-
- if (atomic_read(&rchan->suspended) == 1)
- return 0;
-
- mapped = atomic_read(&rchan->mapped);
-
- if (mapped && bulk_delivery(rchan)) {
- buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
- return buffers_ready ? 0 : 1;
- }
-
- if (mapped && packet_delivery(rchan)) {
- buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
- if (buffers_ready)
- return 0;
- else {
- cur_idx = relay_get_offset(rchan, NULL);
- curbuf_bytes = cur_idx % rchan->buf_size;
- return curbuf_bytes == rchan->bytes_consumed ? 1 : 0;
- }
- }
-
- avail_count = relay_bytes_avail(reader);
-
- return avail_count ? 0 : 1;
-}
-
-/**
- * rchan_full - boolean, is the channel full wrt consuming reader?
- * @reader: channel reader
- *
- * Returns 1 if the channel is full, 0 otherwise.
- */
-int
-rchan_full(struct rchan_reader *reader)
-{
- u32 buffers_ready;
- struct rchan *rchan = reader->rchan;
-
- if (mode_continuous(rchan))
- return 0;
-
- buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
-
- return buffers_ready > reader->rchan->n_bufs - 1 ? 1 : 0;
-}
-
-/**
- * relay_info - get status and other information about a relay channel
- * @rchan_id: relay channel id
- * @rchan_info: pointer to the rchan_info struct to be filled in
- *
- * Fills in an rchan_info struct with channel status and attribute
- * information. See Documentation/filesystems/relayfs.txt for details.
- *
- * Returns 0 if successful, negative otherwise.
- */
-int
-relay_info(int rchan_id, struct rchan_info *rchan_info)
-{
- int i;
- struct rchan *rchan;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- rchan_info->flags = rchan->flags;
- rchan_info->buf_size = rchan->buf_size;
- rchan_info->buf_addr = rchan->buf;
- rchan_info->alloc_size = rchan->alloc_size;
- rchan_info->n_bufs = rchan->n_bufs;
- rchan_info->cur_idx = relay_get_offset(rchan, NULL);
- rchan_info->bufs_produced = rchan->bufs_produced;
- rchan_info->bufs_consumed = rchan->bufs_consumed;
- rchan_info->buf_id = rchan->buf_id;
-
- for (i = 0; i < rchan->n_bufs; i++) {
- rchan_info->unused_bytes[i] = rchan->unused_bytes[i];
- if (using_lockless(rchan))
- rchan_info->buffer_complete[i] = (atomic_read(&fill_count(rchan, i)) == rchan->buf_size);
- else
- rchan_info->buffer_complete[i] = 0;
- }
-
- rchan_put(rchan);
-
- return 0;
-}
-
-/**
- * __add_rchan_reader - creates and adds a reader to a channel
- * @rchan: relay channel
- * @filp: the file associated with rchan, if applicable
- * @auto_consume: boolean, whether reader's reads automatically consume
- * @map_reader: boolean, whether reader's reading via a channel mapping
- *
- * Returns a pointer to the reader object create, NULL if unsuccessful
- *
- * Creates and initializes an rchan_reader object for reading the channel.
- * If filp is non-NULL, the reader is a VFS reader, otherwise not.
- *
- * If the reader is a map reader, it isn't considered a VFS reader for
- * our purposes. Also, map_readers can't be auto-consuming.
- */
-struct rchan_reader *
-__add_rchan_reader(struct rchan *rchan, struct file *filp, int auto_consume, int map_reader)
-{
- struct rchan_reader *reader;
- u32 will_read;
-
- reader = kmalloc(sizeof(struct rchan_reader), GFP_KERNEL);
-
- if (reader) {
- write_lock(&rchan->open_readers_lock);
- reader->rchan = rchan;
- if (filp) {
- reader->vfs_reader = 1;
- reader->pos.file = filp;
- } else {
- reader->vfs_reader = 0;
- reader->pos.f_pos = 0;
- }
- reader->map_reader = map_reader;
- reader->auto_consume = auto_consume;
-
- if (!map_reader) {
- will_read = rchan->bufs_produced % rchan->n_bufs;
- if (!will_read && atomic_read(&rchan->suspended))
- will_read = rchan->n_bufs;
- reader->bufs_consumed = rchan->bufs_produced - will_read;
- rchan->bufs_consumed = reader->bufs_consumed;
- rchan->bytes_consumed = reader->bytes_consumed = 0;
- reader->offset_changed = 0;
- }
-
- list_add(&reader->list, &rchan->open_readers);
- write_unlock(&rchan->open_readers_lock);
- }
-
- return reader;
-}
-
-/**
- * add_rchan_reader - create a reader for a channel
- * @rchan_id: relay channel handle
- * @auto_consume: boolean, whether reader's reads automatically consume
- *
- * Returns a pointer to the reader object created, NULL if unsuccessful
- *
- * Creates and initializes an rchan_reader object for reading the channel.
- * This function is useful only for non-VFS readers.
- */
-struct rchan_reader *
-add_rchan_reader(int rchan_id, int auto_consume)
-{
- struct rchan *rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return NULL;
-
- return __add_rchan_reader(rchan, NULL, auto_consume, 0);
-}
-
-/**
- * add_map_reader - create a map reader for a channel
- * @rchan_id: relay channel handle
- *
- * Returns a pointer to the reader object created, NULL if unsuccessful
- *
- * Creates and initializes an rchan_reader object for reading the channel.
- * This function is useful only for map readers.
- */
-struct rchan_reader *
-add_map_reader(int rchan_id)
-{
- struct rchan *rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return NULL;
-
- return __add_rchan_reader(rchan, NULL, 0, 1);
-}
-
-/**
- * __remove_rchan_reader - destroy a channel reader
- * @reader: channel reader
- *
- * Internal - removes reader from the open readers list, and frees it.
- */
-void
-__remove_rchan_reader(struct rchan_reader *reader)
-{
- struct list_head *p;
- struct rchan_reader *found_reader = NULL;
-
- write_lock(&reader->rchan->open_readers_lock);
- list_for_each(p, &reader->rchan->open_readers) {
- found_reader = list_entry(p, struct rchan_reader, list);
- if (found_reader == reader) {
- list_del(&found_reader->list);
- break;
- }
- }
- write_unlock(&reader->rchan->open_readers_lock);
-
- if (found_reader)
- kfree(found_reader);
-}
-
-/**
- * remove_rchan_reader - destroy a channel reader
- * @reader: channel reader
- *
- * Finds and removes the given reader from the channel. This function
- * is useful only for non-VFS readers.
- *
- * Returns 0 if successful, negative otherwise.
- */
-int
-remove_rchan_reader(struct rchan_reader *reader)
-{
- int err = 0;
-
- if (reader) {
- rchan_put(reader->rchan);
- __remove_rchan_reader(reader);
- } else
- err = -EINVAL;
-
- return err;
-}
-
-/**
- * remove_map_reader - destroy a map reader
- * @reader: channel reader
- *
- * Finds and removes the given map reader from the channel. This function
- * is useful only for map readers.
- *
- * Returns 0 if successful, negative otherwise.
- */
-int
-remove_map_reader(struct rchan_reader *reader)
-{
- return remove_rchan_reader(reader);
-}
-
-EXPORT_SYMBOL(relay_open);
-EXPORT_SYMBOL(relay_close);
-EXPORT_SYMBOL(relay_reset);
-EXPORT_SYMBOL(relay_reserve);
-EXPORT_SYMBOL(relay_commit);
-EXPORT_SYMBOL(relay_read);
-EXPORT_SYMBOL(relay_write);
-EXPORT_SYMBOL(relay_bytes_avail);
-EXPORT_SYMBOL(relay_buffers_consumed);
-EXPORT_SYMBOL(relay_bytes_consumed);
-EXPORT_SYMBOL(relay_info);
-EXPORT_SYMBOL(relay_discard_init_buf);
-
-
+++ /dev/null
-/*
- * RelayFS locking scheme implementation.
- *
- * Copyright (C) 1999, 2000, 2001, 2002 - Karim Yaghmour (karim@opersys.com)
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- *
- * This file is released under the GPL.
- */
-
-#include <asm/relay.h>
-#include "relay_locking.h"
-#include "resize.h"
-
-/**
- * switch_buffers - switches between read and write buffers.
- * @cur_time: current time.
- * @cur_tsc: the TSC associated with current_time, if applicable
- * @rchan: the channel
- * @finalizing: if true, don't start a new buffer
- * @resetting: if true,
- *
- * This should be called from with interrupts disabled.
- */
-static void
-switch_buffers(struct timeval cur_time,
- u32 cur_tsc,
- struct rchan *rchan,
- int finalizing,
- int resetting,
- int finalize_buffer_only)
-{
- char *chan_buf_end;
- int bytes_written;
-
- if (!rchan->half_switch) {
- bytes_written = rchan->callbacks->buffer_end(rchan->id,
- cur_write_pos(rchan), write_buf_end(rchan),
- cur_time, cur_tsc, using_tsc(rchan));
- if (bytes_written == 0)
- rchan->unused_bytes[rchan->buf_idx % rchan->n_bufs] =
- write_buf_end(rchan) - cur_write_pos(rchan);
- }
-
- if (finalize_buffer_only) {
- rchan->bufs_produced++;
- return;
- }
-
- chan_buf_end = rchan->buf + rchan->n_bufs * rchan->buf_size;
- if((write_buf(rchan) + rchan->buf_size >= chan_buf_end) || resetting)
- write_buf(rchan) = rchan->buf;
- else
- write_buf(rchan) += rchan->buf_size;
- write_buf_end(rchan) = write_buf(rchan) + rchan->buf_size;
- write_limit(rchan) = write_buf_end(rchan) - rchan->end_reserve;
- cur_write_pos(rchan) = write_buf(rchan);
-
- rchan->buf_start_time = cur_time;
- rchan->buf_start_tsc = cur_tsc;
-
- if (resetting)
- rchan->buf_idx = 0;
- else
- rchan->buf_idx++;
- rchan->buf_id++;
-
- if (!packet_delivery(rchan))
- rchan->unused_bytes[rchan->buf_idx % rchan->n_bufs] = 0;
-
- if (resetting) {
- rchan->bufs_produced = rchan->bufs_produced + rchan->n_bufs;
- rchan->bufs_produced -= rchan->bufs_produced % rchan->n_bufs;
- rchan->bufs_consumed = rchan->bufs_produced;
- rchan->bytes_consumed = 0;
- update_readers_consumed(rchan, rchan->bufs_consumed, rchan->bytes_consumed);
- } else if (!rchan->half_switch)
- rchan->bufs_produced++;
-
- rchan->half_switch = 0;
-
- if (!finalizing) {
- bytes_written = rchan->callbacks->buffer_start(rchan->id, cur_write_pos(rchan), rchan->buf_id, cur_time, cur_tsc, using_tsc(rchan));
- cur_write_pos(rchan) += bytes_written;
- }
-}
-
-/**
- * locking_reserve - reserve a slot in the buffer for an event.
- * @rchan: the channel
- * @slot_len: the length of the slot to reserve
- * @ts: variable that will receive the time the slot was reserved
- * @tsc: the timestamp counter associated with time
- * @err: receives the result flags
- * @interrupting: if this write is interrupting another, set to non-zero
- *
- * Returns pointer to the beginning of the reserved slot, NULL if error.
- *
- * The err value contains the result flags and is an ORed combination
- * of the following:
- *
- * RELAY_BUFFER_SWITCH_NONE - no buffer switch occurred
- * RELAY_EVENT_DISCARD_NONE - event should not be discarded
- * RELAY_BUFFER_SWITCH - buffer switch occurred
- * RELAY_EVENT_DISCARD - event should be discarded (all buffers are full)
- * RELAY_EVENT_TOO_LONG - event won't fit into even an empty buffer
- */
-inline char *
-locking_reserve(struct rchan *rchan,
- u32 slot_len,
- struct timeval *ts,
- u32 *tsc,
- int *err,
- int *interrupting)
-{
- u32 buffers_ready;
- int bytes_written;
-
- *err = RELAY_BUFFER_SWITCH_NONE;
-
- if (slot_len >= rchan->buf_size) {
- *err = RELAY_WRITE_DISCARD | RELAY_WRITE_TOO_LONG;
- return NULL;
- }
-
- if (rchan->initialized == 0) {
- rchan->initialized = 1;
- get_timestamp(&rchan->buf_start_time,
- &rchan->buf_start_tsc, rchan);
- rchan->unused_bytes[0] = 0;
- bytes_written = rchan->callbacks->buffer_start(
- rchan->id, cur_write_pos(rchan),
- rchan->buf_id, rchan->buf_start_time,
- rchan->buf_start_tsc, using_tsc(rchan));
- cur_write_pos(rchan) += bytes_written;
- *tsc = get_time_delta(ts, rchan);
- return cur_write_pos(rchan);
- }
-
- *tsc = get_time_delta(ts, rchan);
-
- if (in_progress_event_size(rchan)) {
- interrupted_pos(rchan) = cur_write_pos(rchan);
- cur_write_pos(rchan) = in_progress_event_pos(rchan)
- + in_progress_event_size(rchan)
- + interrupting_size(rchan);
- *interrupting = 1;
- } else {
- in_progress_event_pos(rchan) = cur_write_pos(rchan);
- in_progress_event_size(rchan) = slot_len;
- interrupting_size(rchan) = 0;
- }
-
- if (cur_write_pos(rchan) + slot_len > write_limit(rchan)) {
- if (atomic_read(&rchan->suspended) == 1) {
- in_progress_event_pos(rchan) = NULL;
- in_progress_event_size(rchan) = 0;
- interrupting_size(rchan) = 0;
- *err = RELAY_WRITE_DISCARD;
- return NULL;
- }
-
- buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
- if (buffers_ready == rchan->n_bufs - 1) {
- if (!mode_continuous(rchan)) {
- atomic_set(&rchan->suspended, 1);
- in_progress_event_pos(rchan) = NULL;
- in_progress_event_size(rchan) = 0;
- interrupting_size(rchan) = 0;
- get_timestamp(ts, tsc, rchan);
- switch_buffers(*ts, *tsc, rchan, 0, 0, 1);
- recalc_time_delta(ts, tsc, rchan);
- rchan->half_switch = 1;
-
- cur_write_pos(rchan) = write_buf_end(rchan) - 1;
- *err = RELAY_BUFFER_SWITCH | RELAY_WRITE_DISCARD;
- return NULL;
- }
- }
-
- get_timestamp(ts, tsc, rchan);
- switch_buffers(*ts, *tsc, rchan, 0, 0, 0);
- recalc_time_delta(ts, tsc, rchan);
- *err = RELAY_BUFFER_SWITCH;
- }
-
- return cur_write_pos(rchan);
-}
-
-/**
- * locking_commit - commit a reserved slot in the buffer
- * @rchan: the channel
- * @from: commit the length starting here
- * @len: length committed
- * @deliver: length committed
- * @interrupting: not used
- *
- * Commits len bytes and calls deliver callback if applicable.
- */
-inline void
-locking_commit(struct rchan *rchan,
- char *from,
- u32 len,
- int deliver,
- int interrupting)
-{
- cur_write_pos(rchan) += len;
-
- if (interrupting) {
- cur_write_pos(rchan) = interrupted_pos(rchan);
- interrupting_size(rchan) += len;
- } else {
- in_progress_event_size(rchan) = 0;
- if (interrupting_size(rchan)) {
- cur_write_pos(rchan) += interrupting_size(rchan);
- interrupting_size(rchan) = 0;
- }
- }
-
- if (deliver) {
- if (bulk_delivery(rchan)) {
- u32 cur_idx = cur_write_pos(rchan) - rchan->buf;
- u32 cur_bufno = cur_idx / rchan->buf_size;
- from = rchan->buf + cur_bufno * rchan->buf_size;
- len = cur_idx - cur_bufno * rchan->buf_size;
- }
- rchan->callbacks->deliver(rchan->id, from, len);
- expand_check(rchan);
- }
-}
-
-/**
- * locking_finalize: - finalize last buffer at end of channel use
- * @rchan: the channel
- */
-inline void
-locking_finalize(struct rchan *rchan)
-{
- unsigned long int flags;
- struct timeval time;
- u32 tsc;
-
- local_irq_save(flags);
- get_timestamp(&time, &tsc, rchan);
- switch_buffers(time, tsc, rchan, 1, 0, 0);
- local_irq_restore(flags);
-}
-
-/**
- * locking_get_offset - get current and max 'file' offsets for VFS
- * @rchan: the channel
- * @max_offset: maximum channel offset
- *
- * Returns the current and maximum buffer offsets in VFS terms.
- */
-u32
-locking_get_offset(struct rchan *rchan,
- u32 *max_offset)
-{
- if (max_offset)
- *max_offset = rchan->buf_size * rchan->n_bufs - 1;
-
- return cur_write_pos(rchan) - rchan->buf;
-}
-
-/**
- * locking_reset - reset the channel
- * @rchan: the channel
- * @init: 1 if this is a first-time channel initialization
- */
-void locking_reset(struct rchan *rchan, int init)
-{
- if (init)
- channel_lock(rchan) = SPIN_LOCK_UNLOCKED;
- write_buf(rchan) = rchan->buf;
- write_buf_end(rchan) = write_buf(rchan) + rchan->buf_size;
- cur_write_pos(rchan) = write_buf(rchan);
- write_limit(rchan) = write_buf_end(rchan) - rchan->end_reserve;
- in_progress_event_pos(rchan) = NULL;
- in_progress_event_size(rchan) = 0;
- interrupted_pos(rchan) = NULL;
- interrupting_size(rchan) = 0;
-}
-
-/**
- * locking_reset_index - atomically set channel index to the beginning
- * @rchan: the channel
- *
- * If this fails, it means that something else just logged something
- * and therefore we probably no longer want to do this. It's up to the
- * caller anyway...
- *
- * Returns 0 if the index was successfully set, negative otherwise
- */
-int
-locking_reset_index(struct rchan *rchan, u32 old_idx)
-{
- unsigned long flags;
- struct timeval time;
- u32 tsc;
- u32 cur_idx;
-
- relay_lock_channel(rchan, flags);
- cur_idx = locking_get_offset(rchan, NULL);
- if (cur_idx != old_idx) {
- relay_unlock_channel(rchan, flags);
- return -1;
- }
-
- get_timestamp(&time, &tsc, rchan);
- switch_buffers(time, tsc, rchan, 0, 1, 0);
-
- relay_unlock_channel(rchan, flags);
-
- return 0;
-}
-
-
-
-
-
-
-
+++ /dev/null
-#ifndef _RELAY_LOCKING_H
-#define _RELAY_LOCKING_H
-
-extern char *
-locking_reserve(struct rchan *rchan,
- u32 slot_len,
- struct timeval *time_stamp,
- u32 *tsc,
- int *err,
- int *interrupting);
-
-extern void
-locking_commit(struct rchan *rchan,
- char *from,
- u32 len,
- int deliver,
- int interrupting);
-
-extern void
-locking_resume(struct rchan *rchan);
-
-extern void
-locking_finalize(struct rchan *rchan);
-
-extern u32
-locking_get_offset(struct rchan *rchan, u32 *max_offset);
-
-extern void
-locking_reset(struct rchan *rchan, int init);
-
-extern int
-locking_reset_index(struct rchan *rchan, u32 old_idx);
-
-#endif /* _RELAY_LOCKING_H */
+++ /dev/null
-/*
- * RelayFS lockless scheme implementation.
- *
- * Copyright (C) 1999, 2000, 2001, 2002 - Karim Yaghmour (karim@opersys.com)
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 2002, 2003 - Bob Wisniewski (bob@watson.ibm.com), IBM Corp
- *
- * This file is released under the GPL.
- */
-
-#include <asm/relay.h>
-#include "relay_lockless.h"
-#include "resize.h"
-
-/**
- * compare_and_store_volatile - self-explicit
- * @ptr: ptr to the word that will receive the new value
- * @oval: the value we think is currently in *ptr
- * @nval: the value *ptr will get if we were right
- */
-inline int
-compare_and_store_volatile(volatile u32 *ptr,
- u32 oval,
- u32 nval)
-{
- u32 prev;
-
- barrier();
- prev = cmpxchg(ptr, oval, nval);
- barrier();
-
- return (prev == oval);
-}
-
-/**
- * atomic_set_volatile - atomically set the value in ptr to nval.
- * @ptr: ptr to the word that will receive the new value
- * @nval: the new value
- */
-inline void
-atomic_set_volatile(atomic_t *ptr,
- u32 nval)
-{
- barrier();
- atomic_set(ptr, (int)nval);
- barrier();
-}
-
-/**
- * atomic_add_volatile - atomically add val to the value at ptr.
- * @ptr: ptr to the word that will receive the addition
- * @val: the value to add to *ptr
- */
-inline void
-atomic_add_volatile(atomic_t *ptr, u32 val)
-{
- barrier();
- atomic_add((int)val, ptr);
- barrier();
-}
-
-/**
- * atomic_sub_volatile - atomically substract val from the value at ptr.
- * @ptr: ptr to the word that will receive the subtraction
- * @val: the value to subtract from *ptr
- */
-inline void
-atomic_sub_volatile(atomic_t *ptr, s32 val)
-{
- barrier();
- atomic_sub((int)val, ptr);
- barrier();
-}
-
-/**
- * lockless_commit - commit a reserved slot in the buffer
- * @rchan: the channel
- * @from: commit the length starting here
- * @len: length committed
- * @deliver: length committed
- * @interrupting: not used
- *
- * Commits len bytes and calls deliver callback if applicable.
- */
-inline void
-lockless_commit(struct rchan *rchan,
- char *from,
- u32 len,
- int deliver,
- int interrupting)
-{
- u32 bufno, idx;
-
- idx = from - rchan->buf;
-
- if (len > 0) {
- bufno = RELAY_BUFNO_GET(idx, offset_bits(rchan));
- atomic_add_volatile(&fill_count(rchan, bufno), len);
- }
-
- if (deliver) {
- u32 mask = offset_mask(rchan);
- if (bulk_delivery(rchan)) {
- from = rchan->buf + RELAY_BUF_OFFSET_CLEAR(idx, mask);
- len += RELAY_BUF_OFFSET_GET(idx, mask);
- }
- rchan->callbacks->deliver(rchan->id, from, len);
- expand_check(rchan);
- }
-}
-
-/**
- * get_buffer_end - get the address of the end of buffer
- * @rchan: the channel
- * @buf_idx: index into channel corresponding to address
- */
-static inline char *
-get_buffer_end(struct rchan *rchan, u32 buf_idx)
-{
- return rchan->buf
- + RELAY_BUF_OFFSET_CLEAR(buf_idx, offset_mask(rchan))
- + RELAY_BUF_SIZE(offset_bits(rchan));
-}
-
-
-/**
- * finalize_buffer - utility function consolidating end-of-buffer tasks.
- * @rchan: the channel
- * @end_idx: index into buffer to write the end-buffer event at
- * @size_lost: number of unused bytes at the end of the buffer
- * @time_stamp: the time of the end-buffer event
- * @tsc: the timestamp counter associated with time
- * @resetting: are we resetting the channel?
- *
- * This function must be called with local irqs disabled.
- */
-static inline void
-finalize_buffer(struct rchan *rchan,
- u32 end_idx,
- u32 size_lost,
- struct timeval *time_stamp,
- u32 *tsc,
- int resetting)
-{
- char* cur_write_pos;
- char* write_buf_end;
- u32 bufno;
- int bytes_written;
-
- cur_write_pos = rchan->buf + end_idx;
- write_buf_end = get_buffer_end(rchan, end_idx - 1);
-
- bytes_written = rchan->callbacks->buffer_end(rchan->id, cur_write_pos,
- write_buf_end, *time_stamp, *tsc, using_tsc(rchan));
- if (bytes_written == 0)
- rchan->unused_bytes[rchan->buf_idx % rchan->n_bufs] = size_lost;
-
- bufno = RELAY_BUFNO_GET(end_idx, offset_bits(rchan));
- atomic_add_volatile(&fill_count(rchan, bufno), size_lost);
- if (resetting) {
- rchan->bufs_produced = rchan->bufs_produced + rchan->n_bufs;
- rchan->bufs_produced -= rchan->bufs_produced % rchan->n_bufs;
- rchan->bufs_consumed = rchan->bufs_produced;
- rchan->bytes_consumed = 0;
- update_readers_consumed(rchan, rchan->bufs_consumed, rchan->bytes_consumed);
- } else
- rchan->bufs_produced++;
-}
-
-/**
- * lockless_finalize: - finalize last buffer at end of channel use
- * @rchan: the channel
- */
-inline void
-lockless_finalize(struct rchan *rchan)
-{
- u32 event_end_idx;
- u32 size_lost;
- unsigned long int flags;
- struct timeval time;
- u32 tsc;
-
- event_end_idx = RELAY_BUF_OFFSET_GET(idx(rchan), offset_mask(rchan));
- size_lost = RELAY_BUF_SIZE(offset_bits(rchan)) - event_end_idx;
-
- local_irq_save(flags);
- get_timestamp(&time, &tsc, rchan);
- finalize_buffer(rchan, idx(rchan) & idx_mask(rchan), size_lost,
- &time, &tsc, 0);
- local_irq_restore(flags);
-}
-
-/**
- * discard_check: - determine whether a write should be discarded
- * @rchan: the channel
- * @old_idx: index into buffer where check for space should begin
- * @write_len: the length of the write to check
- * @time_stamp: the time of the end-buffer event
- * @tsc: the timestamp counter associated with time
- *
- * The return value contains the result flags and is an ORed combination
- * of the following:
- *
- * RELAY_WRITE_DISCARD_NONE - write should not be discarded
- * RELAY_BUFFER_SWITCH - buffer switch occurred
- * RELAY_WRITE_DISCARD - write should be discarded (all buffers are full)
- * RELAY_WRITE_TOO_LONG - write won't fit into even an empty buffer
- */
-static inline int
-discard_check(struct rchan *rchan,
- u32 old_idx,
- u32 write_len,
- struct timeval *time_stamp,
- u32 *tsc)
-{
- u32 buffers_ready;
- u32 offset_mask = offset_mask(rchan);
- u8 offset_bits = offset_bits(rchan);
- u32 idx_mask = idx_mask(rchan);
- u32 size_lost;
- unsigned long int flags;
-
- if (write_len > RELAY_BUF_SIZE(offset_bits))
- return RELAY_WRITE_DISCARD | RELAY_WRITE_TOO_LONG;
-
- if (mode_continuous(rchan))
- return RELAY_WRITE_DISCARD_NONE;
-
- local_irq_save(flags);
- if (atomic_read(&rchan->suspended) == 1) {
- local_irq_restore(flags);
- return RELAY_WRITE_DISCARD;
- }
- if (rchan->half_switch) {
- local_irq_restore(flags);
- return RELAY_WRITE_DISCARD_NONE;
- }
- buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
- if (buffers_ready == rchan->n_bufs - 1) {
- atomic_set(&rchan->suspended, 1);
- size_lost = RELAY_BUF_SIZE(offset_bits)
- - RELAY_BUF_OFFSET_GET(old_idx, offset_mask);
- finalize_buffer(rchan, old_idx & idx_mask, size_lost,
- time_stamp, tsc, 0);
- rchan->half_switch = 1;
- idx(rchan) = RELAY_BUF_OFFSET_CLEAR((old_idx & idx_mask), offset_mask(rchan)) + RELAY_BUF_SIZE(offset_bits) - 1;
- local_irq_restore(flags);
-
- return RELAY_BUFFER_SWITCH | RELAY_WRITE_DISCARD;
- }
- local_irq_restore(flags);
-
- return RELAY_WRITE_DISCARD_NONE;
-}
-
-/**
- * switch_buffers - switch over to a new sub-buffer
- * @rchan: the channel
- * @slot_len: the length of the slot needed for the current write
- * @offset: the offset calculated for the new index
- * @ts: timestamp
- * @tsc: the timestamp counter associated with time
- * @old_idx: the value of the buffer control index when we were called
- * @old_idx: the new calculated value of the buffer control index
- * @resetting: are we resetting the channel?
- */
-static inline void
-switch_buffers(struct rchan *rchan,
- u32 slot_len,
- u32 offset,
- struct timeval *ts,
- u32 *tsc,
- u32 new_idx,
- u32 old_idx,
- int resetting)
-{
- u32 size_lost = rchan->end_reserve;
- unsigned long int flags;
- u32 idx_mask = idx_mask(rchan);
- u8 offset_bits = offset_bits(rchan);
- char *cur_write_pos;
- u32 new_buf_no;
- u32 start_reserve = rchan->start_reserve;
-
- if (resetting)
- size_lost = RELAY_BUF_SIZE(offset_bits(rchan)) - old_idx % rchan->buf_size;
-
- if (offset > 0)
- size_lost += slot_len - offset;
- else
- old_idx += slot_len;
-
- local_irq_save(flags);
- if (!rchan->half_switch)
- finalize_buffer(rchan, old_idx & idx_mask, size_lost,
- ts, tsc, resetting);
- rchan->half_switch = 0;
- rchan->buf_start_time = *ts;
- rchan->buf_start_tsc = *tsc;
- local_irq_restore(flags);
-
- cur_write_pos = rchan->buf + RELAY_BUF_OFFSET_CLEAR((new_idx
- & idx_mask), offset_mask(rchan));
- if (resetting)
- rchan->buf_idx = 0;
- else
- rchan->buf_idx++;
- rchan->buf_id++;
-
- rchan->unused_bytes[rchan->buf_idx % rchan->n_bufs] = 0;
-
- rchan->callbacks->buffer_start(rchan->id, cur_write_pos,
- rchan->buf_id, *ts, *tsc, using_tsc(rchan));
- new_buf_no = RELAY_BUFNO_GET(new_idx & idx_mask, offset_bits);
- atomic_sub_volatile(&fill_count(rchan, new_buf_no),
- RELAY_BUF_SIZE(offset_bits) - start_reserve);
- if (atomic_read(&fill_count(rchan, new_buf_no)) < start_reserve)
- atomic_set_volatile(&fill_count(rchan, new_buf_no),
- start_reserve);
-}
-
-/**
- * lockless_reserve_slow - the slow reserve path in the lockless scheme
- * @rchan: the channel
- * @slot_len: the length of the slot to reserve
- * @ts: variable that will receive the time the slot was reserved
- * @tsc: the timestamp counter associated with time
- * @old_idx: the value of the buffer control index when we were called
- * @err: receives the result flags
- *
- * Returns pointer to the beginning of the reserved slot, NULL if error.
-
- * err values same as for lockless_reserve.
- */
-static inline char *
-lockless_reserve_slow(struct rchan *rchan,
- u32 slot_len,
- struct timeval *ts,
- u32 *tsc,
- u32 old_idx,
- int *err)
-{
- u32 new_idx, offset;
- unsigned long int flags;
- u32 offset_mask = offset_mask(rchan);
- u32 idx_mask = idx_mask(rchan);
- u32 start_reserve = rchan->start_reserve;
- u32 end_reserve = rchan->end_reserve;
- int discard_event;
- u32 reserved_idx;
- char *cur_write_pos;
- int initializing = 0;
-
- *err = RELAY_BUFFER_SWITCH_NONE;
-
- discard_event = discard_check(rchan, old_idx, slot_len, ts, tsc);
- if (discard_event != RELAY_WRITE_DISCARD_NONE) {
- *err = discard_event;
- return NULL;
- }
-
- local_irq_save(flags);
- if (rchan->initialized == 0) {
- rchan->initialized = initializing = 1;
- idx(rchan) = rchan->start_reserve + rchan->rchan_start_reserve;
- }
- local_irq_restore(flags);
-
- do {
- old_idx = idx(rchan);
- new_idx = old_idx + slot_len;
-
- offset = RELAY_BUF_OFFSET_GET(new_idx + end_reserve,
- offset_mask);
- if ((offset < slot_len) && (offset > 0)) {
- reserved_idx = RELAY_BUF_OFFSET_CLEAR(new_idx
- + end_reserve, offset_mask) + start_reserve;
- new_idx = reserved_idx + slot_len;
- } else if (offset < slot_len) {
- reserved_idx = old_idx;
- new_idx = RELAY_BUF_OFFSET_CLEAR(new_idx
- + end_reserve, offset_mask) + start_reserve;
- } else
- reserved_idx = old_idx;
- get_timestamp(ts, tsc, rchan);
- } while (!compare_and_store_volatile(&idx(rchan), old_idx, new_idx));
-
- reserved_idx &= idx_mask;
-
- if (initializing == 1) {
- cur_write_pos = rchan->buf
- + RELAY_BUF_OFFSET_CLEAR((old_idx & idx_mask),
- offset_mask(rchan));
- rchan->buf_start_time = *ts;
- rchan->buf_start_tsc = *tsc;
- rchan->unused_bytes[0] = 0;
-
- rchan->callbacks->buffer_start(rchan->id, cur_write_pos,
- rchan->buf_id, *ts, *tsc, using_tsc(rchan));
- }
-
- if (offset < slot_len) {
- switch_buffers(rchan, slot_len, offset, ts, tsc, new_idx,
- old_idx, 0);
- *err = RELAY_BUFFER_SWITCH;
- }
-
- /* If not using TSC, need to calc time delta */
- recalc_time_delta(ts, tsc, rchan);
-
- return rchan->buf + reserved_idx;
-}
-
-/**
- * lockless_reserve - reserve a slot in the buffer for an event.
- * @rchan: the channel
- * @slot_len: the length of the slot to reserve
- * @ts: variable that will receive the time the slot was reserved
- * @tsc: the timestamp counter associated with time
- * @err: receives the result flags
- * @interrupting: not used
- *
- * Returns pointer to the beginning of the reserved slot, NULL if error.
- *
- * The err value contains the result flags and is an ORed combination
- * of the following:
- *
- * RELAY_BUFFER_SWITCH_NONE - no buffer switch occurred
- * RELAY_EVENT_DISCARD_NONE - event should not be discarded
- * RELAY_BUFFER_SWITCH - buffer switch occurred
- * RELAY_EVENT_DISCARD - event should be discarded (all buffers are full)
- * RELAY_EVENT_TOO_LONG - event won't fit into even an empty buffer
- */
-inline char *
-lockless_reserve(struct rchan *rchan,
- u32 slot_len,
- struct timeval *ts,
- u32 *tsc,
- int *err,
- int *interrupting)
-{
- u32 old_idx, new_idx, offset;
- u32 offset_mask = offset_mask(rchan);
-
- do {
- old_idx = idx(rchan);
- new_idx = old_idx + slot_len;
-
- offset = RELAY_BUF_OFFSET_GET(new_idx + rchan->end_reserve,
- offset_mask);
- if (offset < slot_len)
- return lockless_reserve_slow(rchan, slot_len,
- ts, tsc, old_idx, err);
- get_time_or_tsc(ts, tsc, rchan);
- } while (!compare_and_store_volatile(&idx(rchan), old_idx, new_idx));
-
- /* If not using TSC, need to calc time delta */
- recalc_time_delta(ts, tsc, rchan);
-
- *err = RELAY_BUFFER_SWITCH_NONE;
-
- return rchan->buf + (old_idx & idx_mask(rchan));
-}
-
-/**
- * lockless_get_offset - get current and max channel offsets
- * @rchan: the channel
- * @max_offset: maximum channel offset
- *
- * Returns the current and maximum channel offsets.
- */
-u32
-lockless_get_offset(struct rchan *rchan,
- u32 *max_offset)
-{
- if (max_offset)
- *max_offset = rchan->buf_size * rchan->n_bufs - 1;
-
- return rchan->initialized ? idx(rchan) & idx_mask(rchan) : 0;
-}
-
-/**
- * lockless_reset - reset the channel
- * @rchan: the channel
- * @init: 1 if this is a first-time channel initialization
- */
-void lockless_reset(struct rchan *rchan, int init)
-{
- int i;
-
- /* Start first buffer at 0 - (end_reserve + 1) so that it
- gets initialized via buffer_start callback as well. */
- idx(rchan) = 0UL - (rchan->end_reserve + 1);
- idx_mask(rchan) =
- (1UL << (bufno_bits(rchan) + offset_bits(rchan))) - 1;
- atomic_set(&fill_count(rchan, 0),
- (int)rchan->start_reserve +
- (int)rchan->rchan_start_reserve);
- for (i = 1; i < rchan->n_bufs; i++)
- atomic_set(&fill_count(rchan, i),
- (int)RELAY_BUF_SIZE(offset_bits(rchan)));
-}
-
-/**
- * lockless_reset_index - atomically set channel index to the beginning
- * @rchan: the channel
- * @old_idx: the current index
- *
- * If this fails, it means that something else just logged something
- * and therefore we probably no longer want to do this. It's up to the
- * caller anyway...
- *
- * Returns 0 if the index was successfully set, negative otherwise
- */
-int
-lockless_reset_index(struct rchan *rchan, u32 old_idx)
-{
- struct timeval ts;
- u32 tsc;
- u32 new_idx;
-
- if (compare_and_store_volatile(&idx(rchan), old_idx, 0)) {
- new_idx = rchan->start_reserve;
- switch_buffers(rchan, 0, 0, &ts, &tsc, new_idx, old_idx, 1);
- return 0;
- } else
- return -1;
-}
-
-
-
-
-
-
-
-
-
-
-
-
-
+++ /dev/null
-#ifndef _RELAY_LOCKLESS_H
-#define _RELAY_LOCKLESS_H
-
-extern char *
-lockless_reserve(struct rchan *rchan,
- u32 slot_len,
- struct timeval *time_stamp,
- u32 *tsc,
- int * interrupting,
- int * errcode);
-
-extern void
-lockless_commit(struct rchan *rchan,
- char * from,
- u32 len,
- int deliver,
- int interrupting);
-
-extern void
-lockless_resume(struct rchan *rchan);
-
-extern void
-lockless_finalize(struct rchan *rchan);
-
-extern u32
-lockless_get_offset(struct rchan *rchan, u32 *max_offset);
-
-extern void
-lockless_reset(struct rchan *rchan, int init);
-
-extern int
-lockless_reset_index(struct rchan *rchan, u32 old_idx);
-
-#endif/* _RELAY_LOCKLESS_H */
+++ /dev/null
-/*
- * RelayFS buffer management and resizing code.
- *
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 1999, 2000, 2001, 2002 - Karim Yaghmour (karim@opersys.com)
- *
- * This file is released under the GPL.
- */
-
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-#include <asm/relay.h>
-#include "resize.h"
-
-/**
- * alloc_page_array - alloc array to hold pages, but not pages
- * @size: the total size of the memory represented by the page array
- * @page_count: the number of pages the array can hold
- * @err: 0 on success, negative otherwise
- *
- * Returns a pointer to the page array if successful, NULL otherwise.
- */
-static struct page **
-alloc_page_array(int size, int *page_count, int *err)
-{
- int n_pages;
- struct page **page_array;
- int page_array_size;
-
- *err = 0;
-
- size = PAGE_ALIGN(size);
- n_pages = size >> PAGE_SHIFT;
- page_array_size = n_pages * sizeof(struct page *);
- page_array = kmalloc(page_array_size, GFP_KERNEL);
- if (page_array == NULL) {
- *err = -ENOMEM;
- return NULL;
- }
- *page_count = n_pages;
- memset(page_array, 0, page_array_size);
-
- return page_array;
-}
-
-/**
- * free_page_array - free array to hold pages, but not pages
- * @page_array: pointer to the page array
- */
-static inline void
-free_page_array(struct page **page_array)
-{
- kfree(page_array);
-}
-
-/**
- * depopulate_page_array - free and unreserve all pages in the array
- * @page_array: pointer to the page array
- * @page_count: number of pages to free
- */
-static void
-depopulate_page_array(struct page **page_array, int page_count)
-{
- int i;
-
- for (i = 0; i < page_count; i++) {
- ClearPageReserved(page_array[i]);
- __free_page(page_array[i]);
- }
-}
-
-/**
- * populate_page_array - allocate and reserve pages
- * @page_array: pointer to the page array
- * @page_count: number of pages to allocate
- *
- * Returns 0 if successful, negative otherwise.
- */
-static int
-populate_page_array(struct page **page_array, int page_count)
-{
- int i;
-
- for (i = 0; i < page_count; i++) {
- page_array[i] = alloc_page(GFP_KERNEL);
- if (unlikely(!page_array[i])) {
- depopulate_page_array(page_array, i);
- return -ENOMEM;
- }
- SetPageReserved(page_array[i]);
- }
- return 0;
-}
-
-/**
- * alloc_rchan_buf - allocate the initial channel buffer
- * @size: total size of the buffer
- * @page_array: receives a pointer to the buffer's page array
- * @page_count: receives the number of pages allocated
- *
- * Returns a pointer to the resulting buffer, NULL if unsuccessful
- */
-void *
-alloc_rchan_buf(unsigned long size, struct page ***page_array, int *page_count)
-{
- void *mem;
- int err;
-
- *page_array = alloc_page_array(size, page_count, &err);
- if (!*page_array)
- return NULL;
-
- err = populate_page_array(*page_array, *page_count);
- if (err) {
- free_page_array(*page_array);
- *page_array = NULL;
- return NULL;
- }
-
- mem = vmap(*page_array, *page_count, GFP_KERNEL, PAGE_KERNEL);
- if (!mem) {
- depopulate_page_array(*page_array, *page_count);
- free_page_array(*page_array);
- *page_array = NULL;
- return NULL;
- }
- memset(mem, 0, size);
-
- return mem;
-}
-
-/**
- * free_rchan_buf - free a channel buffer
- * @buf: pointer to the buffer to free
- * @page_array: pointer to the buffer's page array
- * @page_count: number of pages in page array
- */
-void
-free_rchan_buf(void *buf, struct page **page_array, int page_count)
-{
- vunmap(buf);
- depopulate_page_array(page_array, page_count);
- free_page_array(page_array);
-}
-
-/**
- * expand_check - check whether the channel needs expanding
- * @rchan: the channel
- *
- * If the channel needs expanding, the needs_resize callback is
- * called with RELAY_RESIZE_EXPAND.
- *
- * Returns the suggested number of sub-buffers for the new
- * buffer.
- */
-void
-expand_check(struct rchan *rchan)
-{
- u32 active_bufs;
- u32 new_n_bufs = 0;
- u32 threshold = rchan->n_bufs * RESIZE_THRESHOLD;
-
- if (rchan->init_buf)
- return;
-
- if (rchan->resize_min == 0)
- return;
-
- if (rchan->resizing || rchan->replace_buffer)
- return;
-
- active_bufs = rchan->bufs_produced - rchan->bufs_consumed + 1;
-
- if (rchan->resize_max && active_bufs == threshold) {
- new_n_bufs = rchan->n_bufs * 2;
- }
-
- if (new_n_bufs && (new_n_bufs * rchan->buf_size <= rchan->resize_max))
- rchan->callbacks->needs_resize(rchan->id,
- RELAY_RESIZE_EXPAND,
- rchan->buf_size,
- new_n_bufs);
-}
-
-/**
- * can_shrink - check whether the channel can shrink
- * @rchan: the channel
- * @cur_idx: the current channel index
- *
- * Returns the suggested number of sub-buffers for the new
- * buffer, 0 if the buffer is not shrinkable.
- */
-static inline u32
-can_shrink(struct rchan *rchan, u32 cur_idx)
-{
- u32 active_bufs = rchan->bufs_produced - rchan->bufs_consumed + 1;
- u32 new_n_bufs = 0;
- u32 cur_bufno_bytes = cur_idx % rchan->buf_size;
-
- if (rchan->resize_min == 0 ||
- rchan->resize_min >= rchan->n_bufs * rchan->buf_size)
- goto out;
-
- if (active_bufs > 1)
- goto out;
-
- if (cur_bufno_bytes != rchan->bytes_consumed)
- goto out;
-
- new_n_bufs = rchan->resize_min / rchan->buf_size;
-out:
- return new_n_bufs;
-}
-
-/**
- * shrink_check: - timer function checking whether the channel can shrink
- * @data: unused
- *
- * Every SHRINK_TIMER_SECS, check whether the channel is shrinkable.
- * If so, we attempt to atomically reset the channel to the beginning.
- * The needs_resize callback is then called with RELAY_RESIZE_SHRINK.
- * If the reset fails, it means we really shouldn't be shrinking now
- * and need to wait until the next time around.
- */
-static void
-shrink_check(unsigned long data)
-{
- struct rchan *rchan = (struct rchan *)data;
- u32 shrink_to_nbufs, cur_idx;
-
- del_timer(&rchan->shrink_timer);
- rchan->shrink_timer.expires = jiffies + SHRINK_TIMER_SECS * HZ;
- add_timer(&rchan->shrink_timer);
-
- if (rchan->init_buf)
- return;
-
- if (rchan->resizing || rchan->replace_buffer)
- return;
-
- if (using_lockless(rchan))
- cur_idx = idx(rchan);
- else
- cur_idx = relay_get_offset(rchan, NULL);
-
- shrink_to_nbufs = can_shrink(rchan, cur_idx);
- if (shrink_to_nbufs != 0 && reset_index(rchan, cur_idx) == 0) {
- update_readers_consumed(rchan, rchan->bufs_consumed, 0);
- rchan->callbacks->needs_resize(rchan->id,
- RELAY_RESIZE_SHRINK,
- rchan->buf_size,
- shrink_to_nbufs);
- }
-}
-
-/**
- * init_shrink_timer: - Start timer used to check shrinkability.
- * @rchan: the channel
- */
-void
-init_shrink_timer(struct rchan *rchan)
-{
- if (rchan->resize_min) {
- init_timer(&rchan->shrink_timer);
- rchan->shrink_timer.function = shrink_check;
- rchan->shrink_timer.data = (unsigned long)rchan;
- rchan->shrink_timer.expires = jiffies + SHRINK_TIMER_SECS * HZ;
- add_timer(&rchan->shrink_timer);
- }
-}
-
-
-/**
- * alloc_new_pages - allocate new pages for expanding buffer
- * @rchan: the channel
- *
- * Returns 0 on success, negative otherwise.
- */
-static int
-alloc_new_pages(struct rchan *rchan)
-{
- int new_pages_size, err;
-
- if (unlikely(rchan->expand_page_array)) BUG();
-
- new_pages_size = rchan->resize_alloc_size - rchan->alloc_size;
- rchan->expand_page_array = alloc_page_array(new_pages_size,
- &rchan->expand_page_count, &err);
- if (rchan->expand_page_array == NULL) {
- rchan->resize_err = -ENOMEM;
- return -ENOMEM;
- }
-
- err = populate_page_array(rchan->expand_page_array,
- rchan->expand_page_count);
- if (err) {
- rchan->resize_err = -ENOMEM;
- free_page_array(rchan->expand_page_array);
- rchan->expand_page_array = NULL;
- }
-
- return err;
-}
-
-/**
- * clear_resize_offset - helper function for buffer resizing
- * @rchan: the channel
- *
- * Clear the saved offset change.
- */
-static inline void
-clear_resize_offset(struct rchan *rchan)
-{
- rchan->resize_offset.ge = 0UL;
- rchan->resize_offset.le = 0UL;
- rchan->resize_offset.delta = 0;
-}
-
-/**
- * save_resize_offset - helper function for buffer resizing
- * @rchan: the channel
- * @ge: affected region ge this
- * @le: affected region le this
- * @delta: apply this delta
- *
- * Save a resize offset.
- */
-static inline void
-save_resize_offset(struct rchan *rchan, u32 ge, u32 le, int delta)
-{
- rchan->resize_offset.ge = ge;
- rchan->resize_offset.le = le;
- rchan->resize_offset.delta = delta;
-}
-
-/**
- * update_file_offset - apply offset change to reader
- * @reader: the channel reader
- * @change_idx: the offset index into the offsets array
- *
- * Returns non-zero if the offset was applied.
- *
- * Apply the offset delta saved in change_idx to the reader's
- * current read position.
- */
-static inline int
-update_file_offset(struct rchan_reader *reader)
-{
- int applied = 0;
- struct rchan *rchan = reader->rchan;
- u32 f_pos;
- int delta = reader->rchan->resize_offset.delta;
-
- if (reader->vfs_reader)
- f_pos = (u32)reader->pos.file->f_pos;
- else
- f_pos = reader->pos.f_pos;
-
- if (f_pos == relay_get_offset(rchan, NULL))
- return 0;
-
- if ((f_pos >= rchan->resize_offset.ge - 1) &&
- (f_pos <= rchan->resize_offset.le)) {
- if (reader->vfs_reader)
- reader->pos.file->f_pos += delta;
- else
- reader->pos.f_pos += delta;
- applied = 1;
- }
-
- return applied;
-}
-
-/**
- * update_file_offsets - apply offset change to readers
- * @rchan: the channel
- *
- * Apply the saved offset deltas to all files open on the channel.
- */
-static inline void
-update_file_offsets(struct rchan *rchan)
-{
- struct list_head *p;
- struct rchan_reader *reader;
-
- read_lock(&rchan->open_readers_lock);
- list_for_each(p, &rchan->open_readers) {
- reader = list_entry(p, struct rchan_reader, list);
- if (update_file_offset(reader))
- reader->offset_changed = 1;
- }
- read_unlock(&rchan->open_readers_lock);
-}
-
-/**
- * setup_expand_buf - setup expand buffer for replacement
- * @rchan: the channel
- * @newsize: the size of the new buffer
- * @oldsize: the size of the old buffer
- * @old_n_bufs: the number of sub-buffers in the old buffer
- *
- * Inserts new pages into the old buffer to create a larger
- * new channel buffer, splitting them at old_cur_idx, the bottom
- * half of the old buffer going to the bottom of the new, likewise
- * for the top half.
- */
-static void
-setup_expand_buf(struct rchan *rchan, int newsize, int oldsize, u32 old_n_bufs)
-{
- u32 cur_idx;
- int cur_bufno, delta, i, j;
- u32 ge, le;
- int cur_pageno;
- u32 free_bufs, free_pages;
- u32 free_pages_in_cur_buf;
- u32 free_bufs_to_end;
- u32 cur_pages = rchan->alloc_size >> PAGE_SHIFT;
- u32 pages_per_buf = cur_pages / rchan->n_bufs;
- u32 bufs_ready = rchan->bufs_produced - rchan->bufs_consumed;
-
- if (!rchan->resize_page_array || !rchan->expand_page_array ||
- !rchan->buf_page_array)
- return;
-
- if (bufs_ready >= rchan->n_bufs) {
- bufs_ready = rchan->n_bufs;
- free_bufs = 0;
- } else
- free_bufs = rchan->n_bufs - bufs_ready - 1;
-
- cur_idx = relay_get_offset(rchan, NULL);
- cur_pageno = cur_idx / PAGE_SIZE;
- cur_bufno = cur_idx / rchan->buf_size;
-
- free_pages_in_cur_buf = (pages_per_buf - 1) - (cur_pageno % pages_per_buf);
- free_pages = free_bufs * pages_per_buf + free_pages_in_cur_buf;
- free_bufs_to_end = (rchan->n_bufs - 1) - cur_bufno;
- if (free_bufs >= free_bufs_to_end) {
- free_pages = free_bufs_to_end * pages_per_buf + free_pages_in_cur_buf;
- free_bufs = free_bufs_to_end;
- }
-
- for (i = 0, j = 0; i <= cur_pageno + free_pages; i++, j++)
- rchan->resize_page_array[j] = rchan->buf_page_array[i];
- for (i = 0; i < rchan->expand_page_count; i++, j++)
- rchan->resize_page_array[j] = rchan->expand_page_array[i];
- for (i = cur_pageno + free_pages + 1; i < rchan->buf_page_count; i++, j++)
- rchan->resize_page_array[j] = rchan->buf_page_array[i];
-
- delta = newsize - oldsize;
- ge = (cur_pageno + 1 + free_pages) * PAGE_SIZE;
- le = oldsize;
- save_resize_offset(rchan, ge, le, delta);
-
- rchan->expand_buf_id = rchan->buf_id + 1 + free_bufs;
-}
-
-/**
- * setup_shrink_buf - setup shrink buffer for replacement
- * @rchan: the channel
- *
- * Removes pages from the old buffer to create a smaller
- * new channel buffer.
- */
-static void
-setup_shrink_buf(struct rchan *rchan)
-{
- int i;
- int copy_end_page;
-
- if (!rchan->resize_page_array || !rchan->shrink_page_array ||
- !rchan->buf_page_array)
- return;
-
- copy_end_page = rchan->resize_alloc_size / PAGE_SIZE;
-
- for (i = 0; i < copy_end_page; i++)
- rchan->resize_page_array[i] = rchan->buf_page_array[i];
-}
-
-/**
- * cleanup_failed_alloc - relaybuf_alloc helper
- */
-static void
-cleanup_failed_alloc(struct rchan *rchan)
-{
- if (rchan->expand_page_array) {
- depopulate_page_array(rchan->expand_page_array,
- rchan->expand_page_count);
- free_page_array(rchan->expand_page_array);
- rchan->expand_page_array = NULL;
- rchan->expand_page_count = 0;
- } else if (rchan->shrink_page_array) {
- free_page_array(rchan->shrink_page_array);
- rchan->shrink_page_array = NULL;
- rchan->shrink_page_count = 0;
- }
-
- if (rchan->resize_page_array) {
- free_page_array(rchan->resize_page_array);
- rchan->resize_page_array = NULL;
- rchan->resize_page_count = 0;
- }
-}
-
-/**
- * relaybuf_alloc - allocate a new resized channel buffer
- * @private: pointer to the channel struct
- *
- * Internal - manages the allocation and remapping of new channel
- * buffers.
- */
-static void
-relaybuf_alloc(void *private)
-{
- struct rchan *rchan = (struct rchan *)private;
- int i, j, err;
- u32 old_cur_idx;
- int free_size;
- int free_start_page, free_end_page;
- u32 newsize, oldsize;
-
- if (rchan->resize_alloc_size > rchan->alloc_size) {
- err = alloc_new_pages(rchan);
- if (err) goto cleanup;
- } else {
- free_size = rchan->alloc_size - rchan->resize_alloc_size;
- BUG_ON(free_size <= 0);
- rchan->shrink_page_array = alloc_page_array(free_size,
- &rchan->shrink_page_count, &err);
- if (rchan->shrink_page_array == NULL)
- goto cleanup;
- free_start_page = rchan->resize_alloc_size / PAGE_SIZE;
- free_end_page = rchan->alloc_size / PAGE_SIZE;
- for (i = 0, j = free_start_page; j < free_end_page; i++, j++)
- rchan->shrink_page_array[i] = rchan->buf_page_array[j];
- }
-
- rchan->resize_page_array = alloc_page_array(rchan->resize_alloc_size,
- &rchan->resize_page_count, &err);
- if (rchan->resize_page_array == NULL)
- goto cleanup;
-
- old_cur_idx = relay_get_offset(rchan, NULL);
- clear_resize_offset(rchan);
- newsize = rchan->resize_alloc_size;
- oldsize = rchan->alloc_size;
- if (newsize > oldsize)
- setup_expand_buf(rchan, newsize, oldsize, rchan->n_bufs);
- else
- setup_shrink_buf(rchan);
-
- rchan->resize_buf = vmap(rchan->resize_page_array, rchan->resize_page_count, GFP_KERNEL, PAGE_KERNEL);
-
- if (rchan->resize_buf == NULL)
- goto cleanup;
-
- rchan->replace_buffer = 1;
- rchan->resizing = 0;
-
- rchan->callbacks->needs_resize(rchan->id, RELAY_RESIZE_REPLACE, 0, 0);
- return;
-
-cleanup:
- cleanup_failed_alloc(rchan);
- rchan->resize_err = -ENOMEM;
- return;
-}
-
-/**
- * relaybuf_free - free a resized channel buffer
- * @private: pointer to the channel struct
- *
- * Internal - manages the de-allocation and unmapping of old channel
- * buffers.
- */
-static void
-relaybuf_free(void *private)
-{
- struct free_rchan_buf *free_buf = (struct free_rchan_buf *)private;
- int i;
-
- if (free_buf->unmap_buf)
- vunmap(free_buf->unmap_buf);
-
- for (i = 0; i < 3; i++) {
- if (!free_buf->page_array[i].array)
- continue;
- if (free_buf->page_array[i].count)
- depopulate_page_array(free_buf->page_array[i].array,
- free_buf->page_array[i].count);
- free_page_array(free_buf->page_array[i].array);
- }
-
- kfree(free_buf);
-}
-
-/**
- * calc_order - determine the power-of-2 order of a resize
- * @high: the larger size
- * @low: the smaller size
- *
- * Returns order
- */
-static inline int
-calc_order(u32 high, u32 low)
-{
- int order = 0;
-
- if (!high || !low || high <= low)
- return 0;
-
- while (high > low) {
- order++;
- high /= 2;
- }
-
- return order;
-}
-
-/**
- * check_size - check the sanity of the requested channel size
- * @rchan: the channel
- * @nbufs: the new number of sub-buffers
- * @err: return code
- *
- * Returns the non-zero total buffer size if ok, otherwise 0 and
- * sets errcode if not.
- */
-static inline u32
-check_size(struct rchan *rchan, u32 nbufs, int *err)
-{
- u32 new_channel_size = 0;
-
- *err = 0;
-
- if (nbufs > rchan->n_bufs) {
- rchan->resize_order = calc_order(nbufs, rchan->n_bufs);
- if (!rchan->resize_order) {
- *err = -EINVAL;
- goto out;
- }
-
- new_channel_size = rchan->buf_size * nbufs;
- if (new_channel_size > rchan->resize_max) {
- *err = -EINVAL;
- goto out;
- }
- } else if (nbufs < rchan->n_bufs) {
- if (rchan->n_bufs < 2) {
- *err = -EINVAL;
- goto out;
- }
- rchan->resize_order = -calc_order(rchan->n_bufs, nbufs);
- if (!rchan->resize_order) {
- *err = -EINVAL;
- goto out;
- }
-
- new_channel_size = rchan->buf_size * nbufs;
- if (new_channel_size < rchan->resize_min) {
- *err = -EINVAL;
- goto out;
- }
- } else
- *err = -EINVAL;
-out:
- return new_channel_size;
-}
-
-/**
- * __relay_realloc_buffer - allocate a new channel buffer
- * @rchan: the channel
- * @new_nbufs: the new number of sub-buffers
- * @async: do the allocation using a work queue
- *
- * Internal - see relay_realloc_buffer() for details.
- */
-static int
-__relay_realloc_buffer(struct rchan *rchan, u32 new_nbufs, int async)
-{
- u32 new_channel_size;
- int err = 0;
-
- if (new_nbufs == rchan->n_bufs)
- return -EINVAL;
-
- if (down_trylock(&rchan->resize_sem))
- return -EBUSY;
-
- if (rchan->init_buf) {
- err = -EPERM;
- goto out;
- }
-
- if (rchan->replace_buffer) {
- err = -EBUSY;
- goto out;
- }
-
- if (rchan->resizing) {
- err = -EBUSY;
- goto out;
- } else
- rchan->resizing = 1;
-
- if (rchan->resize_failures > MAX_RESIZE_FAILURES) {
- err = -ENOMEM;
- goto out;
- }
-
- new_channel_size = check_size(rchan, new_nbufs, &err);
- if (err)
- goto out;
-
- rchan->resize_n_bufs = new_nbufs;
- rchan->resize_buf_size = rchan->buf_size;
- rchan->resize_alloc_size = FIX_SIZE(new_channel_size);
-
- if (async) {
- INIT_WORK(&rchan->work, relaybuf_alloc, rchan);
- schedule_delayed_work(&rchan->work, 1);
- } else
- relaybuf_alloc((void *)rchan);
-out:
- up(&rchan->resize_sem);
-
- return err;
-}
-
-/**
- * relay_realloc_buffer - allocate a new channel buffer
- * @rchan_id: the channel id
- * @bufsize: the new sub-buffer size
- * @nbufs: the new number of sub-buffers
- *
- * Allocates a new channel buffer using the specified sub-buffer size
- * and count. If async is non-zero, the allocation is done in the
- * background using a work queue. When the allocation has completed,
- * the needs_resize() callback is called with a resize_type of
- * RELAY_RESIZE_REPLACE. This function doesn't replace the old buffer
- * with the new - see relay_replace_buffer(). See
- * Documentation/filesystems/relayfs.txt for more details.
- *
- * Returns 0 on success, or errcode if the channel is busy or if
- * the allocation couldn't happen for some reason.
- */
-int
-relay_realloc_buffer(int rchan_id, u32 new_nbufs, int async)
-{
- int err;
-
- struct rchan *rchan;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- err = __relay_realloc_buffer(rchan, new_nbufs, async);
-
- rchan_put(rchan);
-
- return err;
-}
-
-/**
- * expand_cancel_check - check whether the current expand needs canceling
- * @rchan: the channel
- *
- * Returns 1 if the expand should be canceled, 0 otherwise.
- */
-static int
-expand_cancel_check(struct rchan *rchan)
-{
- if (rchan->buf_id >= rchan->expand_buf_id)
- return 1;
- else
- return 0;
-}
-
-/**
- * shrink_cancel_check - check whether the current shrink needs canceling
- * @rchan: the channel
- *
- * Returns 1 if the shrink should be canceled, 0 otherwise.
- */
-static int
-shrink_cancel_check(struct rchan *rchan, u32 newsize)
-{
- u32 active_bufs = rchan->bufs_produced - rchan->bufs_consumed + 1;
- u32 cur_idx = relay_get_offset(rchan, NULL);
-
- if (cur_idx >= newsize)
- return 1;
-
- if (active_bufs > 1)
- return 1;
-
- return 0;
-}
-
-/**
- * switch_rchan_buf - do_replace_buffer helper
- */
-static void
-switch_rchan_buf(struct rchan *rchan,
- int newsize,
- int oldsize,
- u32 old_nbufs,
- u32 cur_idx)
-{
- u32 newbufs, cur_bufno;
- int i;
-
- cur_bufno = cur_idx / rchan->buf_size;
-
- rchan->buf = rchan->resize_buf;
- rchan->alloc_size = rchan->resize_alloc_size;
- rchan->n_bufs = rchan->resize_n_bufs;
-
- if (newsize > oldsize) {
- u32 ge = rchan->resize_offset.ge;
- u32 moved_buf = ge / rchan->buf_size;
-
- newbufs = (newsize - oldsize) / rchan->buf_size;
- for (i = moved_buf; i < old_nbufs; i++) {
- if (using_lockless(rchan))
- atomic_set(&fill_count(rchan, i + newbufs),
- atomic_read(&fill_count(rchan, i)));
- rchan->unused_bytes[i + newbufs] = rchan->unused_bytes[i];
- }
- for (i = moved_buf; i < moved_buf + newbufs; i++) {
- if (using_lockless(rchan))
- atomic_set(&fill_count(rchan, i),
- (int)RELAY_BUF_SIZE(offset_bits(rchan)));
- rchan->unused_bytes[i] = 0;
- }
- }
-
- rchan->buf_idx = cur_bufno;
-
- if (!using_lockless(rchan)) {
- cur_write_pos(rchan) = rchan->buf + cur_idx;
- write_buf(rchan) = rchan->buf + cur_bufno * rchan->buf_size;
- write_buf_end(rchan) = write_buf(rchan) + rchan->buf_size;
- write_limit(rchan) = write_buf_end(rchan) - rchan->end_reserve;
- } else {
- idx(rchan) &= idx_mask(rchan);
- bufno_bits(rchan) += rchan->resize_order;
- idx_mask(rchan) =
- (1UL << (bufno_bits(rchan) + offset_bits(rchan))) - 1;
- }
-}
-
-/**
- * do_replace_buffer - does the work of channel buffer replacement
- * @rchan: the channel
- * @newsize: new channel buffer size
- * @oldsize: old channel buffer size
- * @old_n_bufs: old channel sub-buffer count
- *
- * Returns 0 if replacement happened, 1 if canceled
- *
- * Does the work of switching buffers and fixing everything up
- * so the channel can continue with a new size.
- */
-static int
-do_replace_buffer(struct rchan *rchan,
- int newsize,
- int oldsize,
- u32 old_nbufs)
-{
- u32 cur_idx;
- int err = 0;
- int canceled;
-
- cur_idx = relay_get_offset(rchan, NULL);
-
- if (newsize > oldsize)
- canceled = expand_cancel_check(rchan);
- else
- canceled = shrink_cancel_check(rchan, newsize);
-
- if (canceled) {
- err = -EAGAIN;
- goto out;
- }
-
- switch_rchan_buf(rchan, newsize, oldsize, old_nbufs, cur_idx);
-
- if (rchan->resize_offset.delta)
- update_file_offsets(rchan);
-
- atomic_set(&rchan->suspended, 0);
-
- rchan->old_buf_page_array = rchan->buf_page_array;
- rchan->buf_page_array = rchan->resize_page_array;
- rchan->buf_page_count = rchan->resize_page_count;
- rchan->resize_page_array = NULL;
- rchan->resize_page_count = 0;
- rchan->resize_buf = NULL;
- rchan->resize_buf_size = 0;
- rchan->resize_alloc_size = 0;
- rchan->resize_n_bufs = 0;
- rchan->resize_err = 0;
- rchan->resize_order = 0;
-out:
- rchan->callbacks->needs_resize(rchan->id,
- RELAY_RESIZE_REPLACED,
- rchan->buf_size,
- rchan->n_bufs);
- return err;
-}
-
-/**
- * add_free_page_array - add a page_array to be freed
- * @free_rchan_buf: the free_rchan_buf struct
- * @page_array: the page array to free
- * @page_count: the number of pages to free, 0 to free the array only
- *
- * Internal - Used add page_arrays to be freed asynchronously.
- */
-static inline void
-add_free_page_array(struct free_rchan_buf *free_rchan_buf,
- struct page **page_array, int page_count)
-{
- int cur = free_rchan_buf->cur++;
-
- free_rchan_buf->page_array[cur].array = page_array;
- free_rchan_buf->page_array[cur].count = page_count;
-}
-
-/**
- * free_replaced_buffer - free a channel's old buffer
- * @rchan: the channel
- * @oldbuf: the old buffer
- * @oldsize: old buffer size
- *
- * Frees a channel buffer via work queue.
- */
-static int
-free_replaced_buffer(struct rchan *rchan, char *oldbuf, int oldsize)
-{
- struct free_rchan_buf *free_buf;
-
- free_buf = kmalloc(sizeof(struct free_rchan_buf), GFP_ATOMIC);
- if (!free_buf)
- return -ENOMEM;
- memset(free_buf, 0, sizeof(struct free_rchan_buf));
-
- free_buf->unmap_buf = oldbuf;
- add_free_page_array(free_buf, rchan->old_buf_page_array, 0);
- rchan->old_buf_page_array = NULL;
- add_free_page_array(free_buf, rchan->expand_page_array, 0);
- add_free_page_array(free_buf, rchan->shrink_page_array, rchan->shrink_page_count);
-
- rchan->expand_page_array = NULL;
- rchan->expand_page_count = 0;
- rchan->shrink_page_array = NULL;
- rchan->shrink_page_count = 0;
-
- INIT_WORK(&free_buf->work, relaybuf_free, free_buf);
- schedule_delayed_work(&free_buf->work, 1);
-
- return 0;
-}
-
-/**
- * free_canceled_resize - free buffers allocated for a canceled resize
- * @rchan: the channel
- *
- * Frees canceled buffers via work queue.
- */
-static int
-free_canceled_resize(struct rchan *rchan)
-{
- struct free_rchan_buf *free_buf;
-
- free_buf = kmalloc(sizeof(struct free_rchan_buf), GFP_ATOMIC);
- if (!free_buf)
- return -ENOMEM;
- memset(free_buf, 0, sizeof(struct free_rchan_buf));
-
- if (rchan->resize_alloc_size > rchan->alloc_size)
- add_free_page_array(free_buf, rchan->expand_page_array, rchan->expand_page_count);
- else
- add_free_page_array(free_buf, rchan->shrink_page_array, 0);
-
- add_free_page_array(free_buf, rchan->resize_page_array, 0);
- free_buf->unmap_buf = rchan->resize_buf;
-
- rchan->expand_page_array = NULL;
- rchan->expand_page_count = 0;
- rchan->shrink_page_array = NULL;
- rchan->shrink_page_count = 0;
- rchan->resize_page_array = NULL;
- rchan->resize_page_count = 0;
- rchan->resize_buf = NULL;
-
- INIT_WORK(&free_buf->work, relaybuf_free, free_buf);
- schedule_delayed_work(&free_buf->work, 1);
-
- return 0;
-}
-
-/**
- * __relay_replace_buffer - replace channel buffer with new buffer
- * @rchan: the channel
- *
- * Internal - see relay_replace_buffer() for details.
- *
- * Returns 0 if successful, negative otherwise.
- */
-static int
-__relay_replace_buffer(struct rchan *rchan)
-{
- int oldsize;
- int err = 0;
- char *oldbuf;
-
- if (down_trylock(&rchan->resize_sem))
- return -EBUSY;
-
- if (rchan->init_buf) {
- err = -EPERM;
- goto out;
- }
-
- if (!rchan->replace_buffer)
- goto out;
-
- if (rchan->resizing) {
- err = -EBUSY;
- goto out;
- }
-
- if (rchan->resize_buf == NULL) {
- err = -EINVAL;
- goto out;
- }
-
- oldbuf = rchan->buf;
- oldsize = rchan->alloc_size;
-
- err = do_replace_buffer(rchan, rchan->resize_alloc_size,
- oldsize, rchan->n_bufs);
- if (err == 0)
- err = free_replaced_buffer(rchan, oldbuf, oldsize);
- else
- err = free_canceled_resize(rchan);
-out:
- rchan->replace_buffer = 0;
- up(&rchan->resize_sem);
-
- return err;
-}
-
-/**
- * relay_replace_buffer - replace channel buffer with new buffer
- * @rchan_id: the channel id
- *
- * Replaces the current channel buffer with the new buffer allocated
- * by relay_alloc_buffer and contained in the channel struct. When the
- * replacement is complete, the needs_resize() callback is called with
- * RELAY_RESIZE_REPLACED.
- *
- * Returns 0 on success, or errcode if the channel is busy or if
- * the replacement or previous allocation didn't happen for some reason.
- */
-int
-relay_replace_buffer(int rchan_id)
-{
- int err;
-
- struct rchan *rchan;
-
- rchan = rchan_get(rchan_id);
- if (rchan == NULL)
- return -EBADF;
-
- err = __relay_replace_buffer(rchan);
-
- rchan_put(rchan);
-
- return err;
-}
-
-EXPORT_SYMBOL(relay_realloc_buffer);
-EXPORT_SYMBOL(relay_replace_buffer);
-
+++ /dev/null
-#ifndef _RELAY_RESIZE_H
-#define _RELAY_RESIZE_H
-
-/*
- * If the channel usage has been below the low water mark for more than
- * this amount of time, we can shrink the buffer if necessary.
- */
-#define SHRINK_TIMER_SECS 60
-
-/* This inspired by rtai/shmem */
-#define FIX_SIZE(x) (((x) - 1) & PAGE_MASK) + PAGE_SIZE
-
-/* Don't attempt resizing again after this many failures */
-#define MAX_RESIZE_FAILURES 1
-
-/* Trigger resizing if a resizable channel is this full */
-#define RESIZE_THRESHOLD 3 / 4
-
-/*
- * Used for deferring resized channel free
- */
-struct free_rchan_buf
-{
- char *unmap_buf;
- struct
- {
- struct page **array;
- int count;
- } page_array[3];
-
- int cur;
- struct work_struct work; /* resize de-allocation work struct */
-};
-
-extern void *
-alloc_rchan_buf(unsigned long size,
- struct page ***page_array,
- int *page_count);
-
-extern void
-free_rchan_buf(void *buf,
- struct page **page_array,
- int page_count);
-
-extern void
-expand_check(struct rchan *rchan);
-
-extern void
-init_shrink_timer(struct rchan *rchan);
-
-#endif/* _RELAY_RESIZE_H */
+++ /dev/null
-/*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_SUPPORT_MUTEX_H__
-#define __XFS_SUPPORT_MUTEX_H__
-
-#include <linux/spinlock.h>
-#include <asm/semaphore.h>
-
-/*
- * Map the mutex'es from IRIX to Linux semaphores.
- *
- * Destroy just simply initializes to -99 which should block all other
- * callers.
- */
-#define MUTEX_DEFAULT 0x0
-typedef struct semaphore mutex_t;
-
-#define mutex_init(lock, type, name) sema_init(lock, 1)
-#define mutex_destroy(lock) sema_init(lock, -99)
-#define mutex_lock(lock, num) down(lock)
-#define mutex_trylock(lock) (down_trylock(lock) ? 0 : 1)
-#define mutex_unlock(lock) up(lock)
-
-#endif /* __XFS_SUPPORT_MUTEX_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_SUPPORT_SPIN_H__
-#define __XFS_SUPPORT_SPIN_H__
-
-#include <linux/sched.h> /* preempt needs this */
-#include <linux/spinlock.h>
-
-/*
- * Map lock_t from IRIX to Linux spinlocks.
- *
- * We do not make use of lock_t from interrupt context, so we do not
- * have to worry about disabling interrupts at all (unlike IRIX).
- */
-
-typedef spinlock_t lock_t;
-
-#define SPLDECL(s) unsigned long s
-
-#define spinlock_init(lock, name) spin_lock_init(lock)
-#define spinlock_destroy(lock)
-#define mutex_spinlock(lock) ({ spin_lock(lock); 0; })
-#define mutex_spinunlock(lock, s) do { spin_unlock(lock); (void)s; } while (0)
-#define nested_spinlock(lock) spin_lock(lock)
-#define nested_spinunlock(lock) spin_unlock(lock)
-
-#endif /* __XFS_SUPPORT_SPIN_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_SUPPORT_TIME_H__
-#define __XFS_SUPPORT_TIME_H__
-
-#include <linux/sched.h>
-#include <linux/time.h>
-
-typedef struct timespec timespec_t;
-
-static inline void delay(long ticks)
-{
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(ticks);
-}
-
-static inline void nanotime(struct timespec *tvp)
-{
- *tvp = CURRENT_TIME;
-}
-
-#endif /* __XFS_SUPPORT_TIME_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_CRED_H__
-#define __XFS_CRED_H__
-
-/*
- * Credentials
- */
-typedef struct cred {
- /* EMPTY */
-} cred_t;
-
-extern struct cred *sys_cred;
-
-/* this is a hack.. (assums sys_cred is the only cred_t in the system) */
-static __inline int capable_cred(cred_t *cr, int cid)
-{
- return (cr == sys_cred) ? 1 : capable(cid);
-}
-
-#endif /* __XFS_CRED_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000, 2002 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_SUBR_H__
-#define __XFS_SUBR_H__
-
-/*
- * Utilities shared among file system implementations.
- */
-
-struct cred;
-
-extern int fs_noerr(void);
-extern int fs_nosys(void);
-extern int fs_nodev(void);
-extern void fs_noval(void);
-extern void fs_tosspages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
-extern void fs_flushinval_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
-extern int fs_flush_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, uint64_t, int);
-
-#endif /* __XFS_FS_SUBR_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_GLOBALS_H__
-#define __XFS_GLOBALS_H__
-
-/*
- * This file declares globals needed by XFS that were normally defined
- * somewhere else in IRIX.
- */
-
-extern uint64_t xfs_panic_mask; /* set to cause more panics */
-extern unsigned long xfs_physmem;
-extern struct cred *sys_cred;
-
-#endif /* __XFS_GLOBALS_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_inum.h"
-#include "xfs_log.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_dir.h"
-#include "xfs_dir2.h"
-#include "xfs_alloc.h"
-#include "xfs_dmapi.h"
-#include "xfs_quota.h"
-#include "xfs_mount.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dir_sf.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_bmap.h"
-#include "xfs_bit.h"
-#include "xfs_rtalloc.h"
-#include "xfs_error.h"
-#include "xfs_itable.h"
-#include "xfs_rw.h"
-#include "xfs_acl.h"
-#include "xfs_cap.h"
-#include "xfs_mac.h"
-#include "xfs_attr.h"
-#include "xfs_buf_item.h"
-#include "xfs_utils.h"
-
-#include <linux/xattr.h>
-
-
-/*
- * Pull the link count and size up from the xfs inode to the linux inode
- */
-STATIC void
-validate_fields(
- struct inode *ip)
-{
- vnode_t *vp = LINVFS_GET_VP(ip);
- vattr_t va;
- int error;
-
- va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
- VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error);
- if (likely(!error)) {
- ip->i_nlink = va.va_nlink;
- ip->i_blocks = va.va_nblocks;
-
- /* we're under i_sem so i_size can't change under us */
- if (i_size_read(ip) != va.va_size)
- i_size_write(ip, va.va_size);
- }
-}
-
-/*
- * Determine whether a process has a valid fs_struct (kernel daemons
- * like knfsd don't have an fs_struct).
- *
- * XXX(hch): nfsd is broken, better fix it instead.
- */
-STATIC inline int
-has_fs_struct(struct task_struct *task)
-{
- return (task->fs != init_task.fs);
-}
-
-STATIC int
-linvfs_mknod(
- struct inode *dir,
- struct dentry *dentry,
- int mode,
- dev_t rdev)
-{
- struct inode *ip;
- vattr_t va;
- vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir);
- xfs_acl_t *default_acl = NULL;
- attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
- int error;
-
- /*
- * Irix uses Missed'em'V split, but doesn't want to see
- * the upper 5 bits of (14bit) major.
- */
- if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)
- return -EINVAL;
-
- if (test_default_acl && test_default_acl(dvp)) {
- if (!_ACL_ALLOC(default_acl))
- return -ENOMEM;
- if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
- _ACL_FREE(default_acl);
- default_acl = NULL;
- }
- }
-
- if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current))
- mode &= ~current->fs->umask;
-
- memset(&va, 0, sizeof(va));
- va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
- va.va_type = IFTOVT(mode);
- va.va_mode = mode;
-
- switch (mode & S_IFMT) {
- case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
- va.va_rdev = sysv_encode_dev(rdev);
- va.va_mask |= XFS_AT_RDEV;
- /*FALLTHROUGH*/
- case S_IFREG:
- VOP_CREATE(dvp, dentry, &va, &vp, NULL, error);
- break;
- case S_IFDIR:
- VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error);
- break;
- default:
- error = EINVAL;
- break;
- }
-
- if (default_acl) {
- if (!error) {
- error = _ACL_INHERIT(vp, &va, default_acl);
- if (!error) {
- VMODIFY(vp);
- } else {
- struct dentry teardown = {};
- int err2;
-
- /* Oh, the horror.
- * If we can't add the ACL we must back out.
- * ENOSPC can hit here, among other things.
- */
- teardown.d_inode = ip = LINVFS_GET_IP(vp);
- teardown.d_name = dentry->d_name;
- remove_inode_hash(ip);
- make_bad_inode(ip);
- if (S_ISDIR(mode))
- VOP_RMDIR(dvp, &teardown, NULL, err2);
- else
- VOP_REMOVE(dvp, &teardown, NULL, err2);
- VN_RELE(vp);
- }
- }
- _ACL_FREE(default_acl);
- }
-
- if (!error) {
- ASSERT(vp);
- ip = LINVFS_GET_IP(vp);
-
- if (S_ISCHR(mode) || S_ISBLK(mode))
- ip->i_rdev = rdev;
- else if (S_ISDIR(mode))
- validate_fields(ip);
- d_instantiate(dentry, ip);
- validate_fields(dir);
- }
- return -error;
-}
-
-STATIC int
-linvfs_create(
- struct inode *dir,
- struct dentry *dentry,
- int mode,
- struct nameidata *nd)
-{
- return linvfs_mknod(dir, dentry, mode, 0);
-}
-
-STATIC int
-linvfs_mkdir(
- struct inode *dir,
- struct dentry *dentry,
- int mode)
-{
- return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0);
-}
-
-STATIC struct dentry *
-linvfs_lookup(
- struct inode *dir,
- struct dentry *dentry,
- struct nameidata *nd)
-{
- struct inode *ip = NULL;
- vnode_t *vp, *cvp = NULL;
- int error;
-
- if (dentry->d_name.len >= MAXNAMELEN)
- return ERR_PTR(-ENAMETOOLONG);
-
- vp = LINVFS_GET_VP(dir);
- VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error);
- if (!error) {
- ASSERT(cvp);
- ip = LINVFS_GET_IP(cvp);
- if (!ip) {
- VN_RELE(cvp);
- return ERR_PTR(-EACCES);
- }
- }
- if (error && (error != ENOENT))
- return ERR_PTR(-error);
- return d_splice_alias(ip, dentry);
-}
-
-STATIC int
-linvfs_link(
- struct dentry *old_dentry,
- struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *ip; /* inode of guy being linked to */
- vnode_t *tdvp; /* target directory for new name/link */
- vnode_t *vp; /* vp of name being linked */
- int error;
-
- ip = old_dentry->d_inode; /* inode being linked to */
- if (S_ISDIR(ip->i_mode))
- return -EPERM;
-
- tdvp = LINVFS_GET_VP(dir);
- vp = LINVFS_GET_VP(ip);
-
- VOP_LINK(tdvp, vp, dentry, NULL, error);
- if (!error) {
- VMODIFY(tdvp);
- VN_HOLD(vp);
- validate_fields(ip);
- d_instantiate(dentry, ip);
- }
- return -error;
-}
-
-STATIC int
-linvfs_unlink(
- struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode;
- vnode_t *dvp; /* directory containing name to remove */
- int error;
-
- inode = dentry->d_inode;
- dvp = LINVFS_GET_VP(dir);
-
- VOP_REMOVE(dvp, dentry, NULL, error);
- if (!error) {
- validate_fields(dir); /* For size only */
- validate_fields(inode);
- }
-
- return -error;
-}
-
-STATIC int
-linvfs_symlink(
- struct inode *dir,
- struct dentry *dentry,
- const char *symname)
-{
- struct inode *ip;
- vattr_t va;
- vnode_t *dvp; /* directory containing name to remove */
- vnode_t *cvp; /* used to lookup symlink to put in dentry */
- int error;
-
- dvp = LINVFS_GET_VP(dir);
- cvp = NULL;
-
- memset(&va, 0, sizeof(va));
- va.va_type = VLNK;
- va.va_mode = irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO;
- va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
-
- error = 0;
- VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
- if (!error && cvp) {
- ASSERT(cvp->v_type == VLNK);
- ip = LINVFS_GET_IP(cvp);
- d_instantiate(dentry, ip);
- validate_fields(dir);
- validate_fields(ip); /* size needs update */
- }
- return -error;
-}
-
-STATIC int
-linvfs_rmdir(
- struct inode *dir,
- struct dentry *dentry)
-{
- struct inode *inode = dentry->d_inode;
- vnode_t *dvp = LINVFS_GET_VP(dir);
- int error;
-
- VOP_RMDIR(dvp, dentry, NULL, error);
- if (!error) {
- validate_fields(inode);
- validate_fields(dir);
- }
- return -error;
-}
-
-STATIC int
-linvfs_rename(
- struct inode *odir,
- struct dentry *odentry,
- struct inode *ndir,
- struct dentry *ndentry)
-{
- struct inode *new_inode = ndentry->d_inode;
- vnode_t *fvp; /* from directory */
- vnode_t *tvp; /* target directory */
- int error;
-
- fvp = LINVFS_GET_VP(odir);
- tvp = LINVFS_GET_VP(ndir);
-
- VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error);
- if (error)
- return -error;
-
- if (new_inode)
- validate_fields(new_inode);
-
- validate_fields(odir);
- if (ndir != odir)
- validate_fields(ndir);
- return 0;
-}
-
-STATIC int
-linvfs_readlink(
- struct dentry *dentry,
- char *buf,
- int size)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- uio_t uio;
- iovec_t iov;
- int error;
-
- iov.iov_base = buf;
- iov.iov_len = size;
-
- uio.uio_iov = &iov;
- uio.uio_offset = 0;
- uio.uio_segflg = UIO_USERSPACE;
- uio.uio_resid = size;
- uio.uio_iovcnt = 1;
-
- VOP_READLINK(vp, &uio, 0, NULL, error);
- if (error)
- return -error;
-
- return (size - uio.uio_resid);
-}
-
-/*
- * careful here - this function can get called recursively, so
- * we need to be very careful about how much stack we use.
- * uio is kmalloced for this reason...
- */
-STATIC int
-linvfs_follow_link(
- struct dentry *dentry,
- struct nameidata *nd)
-{
- vnode_t *vp;
- uio_t *uio;
- iovec_t iov;
- int error;
- char *link;
-
- ASSERT(dentry);
- ASSERT(nd);
-
- link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL);
- if (!link) {
- nd_set_link(nd, ERR_PTR(-ENOMEM));
- return 0;
- }
-
- uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
- if (!uio) {
- kfree(link);
- nd_set_link(nd, ERR_PTR(-ENOMEM));
- return 0;
- }
-
- vp = LINVFS_GET_VP(dentry->d_inode);
-
- iov.iov_base = link;
- iov.iov_len = MAXNAMELEN;
-
- uio->uio_iov = &iov;
- uio->uio_offset = 0;
- uio->uio_segflg = UIO_SYSSPACE;
- uio->uio_resid = MAXNAMELEN;
- uio->uio_iovcnt = 1;
-
- VOP_READLINK(vp, uio, 0, NULL, error);
- if (error) {
- kfree(link);
- link = ERR_PTR(-error);
- } else {
- link[MAXNAMELEN - uio->uio_resid] = '\0';
- }
- kfree(uio);
-
- nd_set_link(nd, link);
- return 0;
-}
-
-static void linvfs_put_link(struct dentry *dentry, struct nameidata *nd)
-{
- char *s = nd_get_link(nd);
- if (!IS_ERR(s))
- kfree(s);
-}
-
-#ifdef CONFIG_XFS_POSIX_ACL
-STATIC int
-linvfs_permission(
- struct inode *inode,
- int mode,
- struct nameidata *nd)
-{
- vnode_t *vp = LINVFS_GET_VP(inode);
- int error;
-
- mode <<= 6; /* convert from linux to vnode access bits */
- VOP_ACCESS(vp, mode, NULL, error);
- return -error;
-}
-#else
-#define linvfs_permission NULL
-#endif
-
-STATIC int
-linvfs_getattr(
- struct vfsmount *mnt,
- struct dentry *dentry,
- struct kstat *stat)
-{
- struct inode *inode = dentry->d_inode;
- vnode_t *vp = LINVFS_GET_VP(inode);
- int error = 0;
-
- if (unlikely(vp->v_flag & VMODIFIED))
- error = vn_revalidate(vp);
- if (!error)
- generic_fillattr(inode, stat);
- return 0;
-}
-
-STATIC int
-linvfs_setattr(
- struct dentry *dentry,
- struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- unsigned int ia_valid = attr->ia_valid;
- vnode_t *vp = LINVFS_GET_VP(inode);
- vattr_t vattr;
- int flags = 0;
- int error;
-
- memset(&vattr, 0, sizeof(vattr_t));
- if (ia_valid & ATTR_UID) {
- vattr.va_mask |= XFS_AT_UID;
- vattr.va_uid = attr->ia_uid;
- }
- if (ia_valid & ATTR_GID) {
- vattr.va_mask |= XFS_AT_GID;
- vattr.va_gid = attr->ia_gid;
- }
- if (ia_valid & ATTR_SIZE) {
- vattr.va_mask |= XFS_AT_SIZE;
- vattr.va_size = attr->ia_size;
- }
- if (ia_valid & ATTR_ATIME) {
- vattr.va_mask |= XFS_AT_ATIME;
- vattr.va_atime = attr->ia_atime;
- }
- if (ia_valid & ATTR_MTIME) {
- vattr.va_mask |= XFS_AT_MTIME;
- vattr.va_mtime = attr->ia_mtime;
- }
- if (ia_valid & ATTR_CTIME) {
- vattr.va_mask |= XFS_AT_CTIME;
- vattr.va_ctime = attr->ia_ctime;
- }
- if (ia_valid & ATTR_MODE) {
- vattr.va_mask |= XFS_AT_MODE;
- vattr.va_mode = attr->ia_mode;
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
- inode->i_mode &= ~S_ISGID;
- }
-
- if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
- flags |= ATTR_UTIME;
-#ifdef ATTR_NO_BLOCK
- if ((ia_valid & ATTR_NO_BLOCK))
- flags |= ATTR_NONBLOCK;
-#endif
-
- VOP_SETATTR(vp, &vattr, flags, NULL, error);
- if (error)
- return -error;
- vn_revalidate(vp);
- return error;
-}
-
-STATIC void
-linvfs_truncate(
- struct inode *inode)
-{
- block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block);
-}
-
-STATIC int
-linvfs_setxattr(
- struct dentry *dentry,
- const char *name,
- const void *data,
- size_t size,
- int flags)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- char *attr = (char *)name;
- attrnames_t *namesp;
- int xflags = 0;
- int error;
-
- namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
- if (!namesp)
- return -EOPNOTSUPP;
- attr += namesp->attr_namelen;
- error = namesp->attr_capable(vp, NULL);
- if (error)
- return error;
-
- /* Convert Linux syscall to XFS internal ATTR flags */
- if (flags & XATTR_CREATE)
- xflags |= ATTR_CREATE;
- if (flags & XATTR_REPLACE)
- xflags |= ATTR_REPLACE;
- xflags |= namesp->attr_flag;
- return namesp->attr_set(vp, attr, (void *)data, size, xflags);
-}
-
-STATIC ssize_t
-linvfs_getxattr(
- struct dentry *dentry,
- const char *name,
- void *data,
- size_t size)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- char *attr = (char *)name;
- attrnames_t *namesp;
- int xflags = 0;
- ssize_t error;
-
- namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
- if (!namesp)
- return -EOPNOTSUPP;
- attr += namesp->attr_namelen;
- error = namesp->attr_capable(vp, NULL);
- if (error)
- return error;
-
- /* Convert Linux syscall to XFS internal ATTR flags */
- if (!size) {
- xflags |= ATTR_KERNOVAL;
- data = NULL;
- }
- xflags |= namesp->attr_flag;
- return namesp->attr_get(vp, attr, (void *)data, size, xflags);
-}
-
-STATIC ssize_t
-linvfs_listxattr(
- struct dentry *dentry,
- char *data,
- size_t size)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- int error, xflags = ATTR_KERNAMELS;
- ssize_t result;
-
- if (!size)
- xflags |= ATTR_KERNOVAL;
- xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
-
- error = attr_generic_list(vp, data, size, xflags, &result);
- if (error < 0)
- return error;
- return result;
-}
-
-STATIC int
-linvfs_removexattr(
- struct dentry *dentry,
- const char *name)
-{
- vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
- char *attr = (char *)name;
- attrnames_t *namesp;
- int xflags = 0;
- int error;
-
- namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
- if (!namesp)
- return -EOPNOTSUPP;
- attr += namesp->attr_namelen;
- error = namesp->attr_capable(vp, NULL);
- if (error)
- return error;
- xflags |= namesp->attr_flag;
- return namesp->attr_remove(vp, attr, xflags);
-}
-
-
-struct inode_operations linvfs_file_inode_operations = {
- .permission = linvfs_permission,
- .truncate = linvfs_truncate,
- .getattr = linvfs_getattr,
- .setattr = linvfs_setattr,
- .setxattr = linvfs_setxattr,
- .getxattr = linvfs_getxattr,
- .listxattr = linvfs_listxattr,
- .removexattr = linvfs_removexattr,
-};
-
-struct inode_operations linvfs_dir_inode_operations = {
- .create = linvfs_create,
- .lookup = linvfs_lookup,
- .link = linvfs_link,
- .unlink = linvfs_unlink,
- .symlink = linvfs_symlink,
- .mkdir = linvfs_mkdir,
- .rmdir = linvfs_rmdir,
- .mknod = linvfs_mknod,
- .rename = linvfs_rename,
- .permission = linvfs_permission,
- .getattr = linvfs_getattr,
- .setattr = linvfs_setattr,
- .setxattr = linvfs_setxattr,
- .getxattr = linvfs_getxattr,
- .listxattr = linvfs_listxattr,
- .removexattr = linvfs_removexattr,
-};
-
-struct inode_operations linvfs_symlink_inode_operations = {
- .readlink = linvfs_readlink,
- .follow_link = linvfs_follow_link,
- .put_link = linvfs_put_link,
- .permission = linvfs_permission,
- .getattr = linvfs_getattr,
- .setattr = linvfs_setattr,
- .setxattr = linvfs_setxattr,
- .getxattr = linvfs_getxattr,
- .listxattr = linvfs_listxattr,
- .removexattr = linvfs_removexattr,
-};
+++ /dev/null
-/*
- * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-#ifndef __XFS_STATS_H__
-#define __XFS_STATS_H__
-
-
-#if defined(CONFIG_PROC_FS) && !defined(XFS_STATS_OFF)
-
-#include <linux/percpu.h>
-
-/*
- * XFS global statistics
- */
-struct xfsstats {
-# define XFSSTAT_END_EXTENT_ALLOC 4
- __uint32_t xs_allocx;
- __uint32_t xs_allocb;
- __uint32_t xs_freex;
- __uint32_t xs_freeb;
-# define XFSSTAT_END_ALLOC_BTREE (XFSSTAT_END_EXTENT_ALLOC+4)
- __uint32_t xs_abt_lookup;
- __uint32_t xs_abt_compare;
- __uint32_t xs_abt_insrec;
- __uint32_t xs_abt_delrec;
-# define XFSSTAT_END_BLOCK_MAPPING (XFSSTAT_END_ALLOC_BTREE+7)
- __uint32_t xs_blk_mapr;
- __uint32_t xs_blk_mapw;
- __uint32_t xs_blk_unmap;
- __uint32_t xs_add_exlist;
- __uint32_t xs_del_exlist;
- __uint32_t xs_look_exlist;
- __uint32_t xs_cmp_exlist;
-# define XFSSTAT_END_BLOCK_MAP_BTREE (XFSSTAT_END_BLOCK_MAPPING+4)
- __uint32_t xs_bmbt_lookup;
- __uint32_t xs_bmbt_compare;
- __uint32_t xs_bmbt_insrec;
- __uint32_t xs_bmbt_delrec;
-# define XFSSTAT_END_DIRECTORY_OPS (XFSSTAT_END_BLOCK_MAP_BTREE+4)
- __uint32_t xs_dir_lookup;
- __uint32_t xs_dir_create;
- __uint32_t xs_dir_remove;
- __uint32_t xs_dir_getdents;
-# define XFSSTAT_END_TRANSACTIONS (XFSSTAT_END_DIRECTORY_OPS+3)
- __uint32_t xs_trans_sync;
- __uint32_t xs_trans_async;
- __uint32_t xs_trans_empty;
-# define XFSSTAT_END_INODE_OPS (XFSSTAT_END_TRANSACTIONS+7)
- __uint32_t xs_ig_attempts;
- __uint32_t xs_ig_found;
- __uint32_t xs_ig_frecycle;
- __uint32_t xs_ig_missed;
- __uint32_t xs_ig_dup;
- __uint32_t xs_ig_reclaims;
- __uint32_t xs_ig_attrchg;
-# define XFSSTAT_END_LOG_OPS (XFSSTAT_END_INODE_OPS+5)
- __uint32_t xs_log_writes;
- __uint32_t xs_log_blocks;
- __uint32_t xs_log_noiclogs;
- __uint32_t xs_log_force;
- __uint32_t xs_log_force_sleep;
-# define XFSSTAT_END_TAIL_PUSHING (XFSSTAT_END_LOG_OPS+10)
- __uint32_t xs_try_logspace;
- __uint32_t xs_sleep_logspace;
- __uint32_t xs_push_ail;
- __uint32_t xs_push_ail_success;
- __uint32_t xs_push_ail_pushbuf;
- __uint32_t xs_push_ail_pinned;
- __uint32_t xs_push_ail_locked;
- __uint32_t xs_push_ail_flushing;
- __uint32_t xs_push_ail_restarts;
- __uint32_t xs_push_ail_flush;
-# define XFSSTAT_END_WRITE_CONVERT (XFSSTAT_END_TAIL_PUSHING+2)
- __uint32_t xs_xstrat_quick;
- __uint32_t xs_xstrat_split;
-# define XFSSTAT_END_READ_WRITE_OPS (XFSSTAT_END_WRITE_CONVERT+2)
- __uint32_t xs_write_calls;
- __uint32_t xs_read_calls;
-# define XFSSTAT_END_ATTRIBUTE_OPS (XFSSTAT_END_READ_WRITE_OPS+4)
- __uint32_t xs_attr_get;
- __uint32_t xs_attr_set;
- __uint32_t xs_attr_remove;
- __uint32_t xs_attr_list;
-# define XFSSTAT_END_INODE_CLUSTER (XFSSTAT_END_ATTRIBUTE_OPS+3)
- __uint32_t xs_iflush_count;
- __uint32_t xs_icluster_flushcnt;
- __uint32_t xs_icluster_flushinode;
-# define XFSSTAT_END_VNODE_OPS (XFSSTAT_END_INODE_CLUSTER+8)
- __uint32_t vn_active; /* # vnodes not on free lists */
- __uint32_t vn_alloc; /* # times vn_alloc called */
- __uint32_t vn_get; /* # times vn_get called */
- __uint32_t vn_hold; /* # times vn_hold called */
- __uint32_t vn_rele; /* # times vn_rele called */
- __uint32_t vn_reclaim; /* # times vn_reclaim called */
- __uint32_t vn_remove; /* # times vn_remove called */
- __uint32_t vn_free; /* # times vn_free called */
-#define XFSSTAT_END_BUF (XFSSTAT_END_VNODE_OPS+9)
- __uint32_t pb_get;
- __uint32_t pb_create;
- __uint32_t pb_get_locked;
- __uint32_t pb_get_locked_waited;
- __uint32_t pb_busy_locked;
- __uint32_t pb_miss_locked;
- __uint32_t pb_page_retries;
- __uint32_t pb_page_found;
- __uint32_t pb_get_read;
-/* Extra precision counters */
- __uint64_t xs_xstrat_bytes;
- __uint64_t xs_write_bytes;
- __uint64_t xs_read_bytes;
-};
-
-DECLARE_PER_CPU(struct xfsstats, xfsstats);
-
-/* We don't disable preempt, not too worried about poking the
- * wrong cpu's stat for now */
-#define XFS_STATS_INC(count) (__get_cpu_var(xfsstats).count++)
-#define XFS_STATS_DEC(count) (__get_cpu_var(xfsstats).count--)
-#define XFS_STATS_ADD(count, inc) (__get_cpu_var(xfsstats).count += (inc))
-
-extern void xfs_init_procfs(void);
-extern void xfs_cleanup_procfs(void);
-
-
-#else /* !CONFIG_PROC_FS */
-
-# define XFS_STATS_INC(count)
-# define XFS_STATS_DEC(count)
-# define XFS_STATS_ADD(count, inc)
-
-static __inline void xfs_init_procfs(void) { };
-static __inline void xfs_cleanup_procfs(void) { };
-
-#endif /* !CONFIG_PROC_FS */
-
-#endif /* __XFS_STATS_H__ */
+++ /dev/null
-/*
- * Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
-
-/*
- * Dummy file that can contain a timestamp to put into the
- * XFS init string, to help users keep track of what they're
- * running
- */
-
-#ifndef __XFS_VERSION_H__
-#define __XFS_VERSION_H__
-
-#define XFS_VERSION_STRING "SGI XFS"
-
-#endif /* __XFS_VERSION_H__ */
+++ /dev/null
-/*
- * 8253/8254 Programmable Interval Timer
- */
-
-#ifndef _8253PIT_H
-#define _8253PIT_H
-
-#define PIT_TICK_RATE 1193180UL
-
-#endif
+++ /dev/null
-#ifndef _ASM_ALPHA_RELAY_H
-#define _ASM_ALPHA_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/coyote.h
- *
- * ADI Engineering platform specific definitions
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#ifndef __ASM_ARCH_HARDWARE_H__
-#error "Do not include this directly, instead #include <asm/hardware.h>"
-#endif
-
-#define COYOTE_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define COYOTE_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE * 2
-
-/* PCI controller GPIO to IRQ pin mappings */
-#define COYOTE_PCI_SLOT0_PIN 6
-#define COYOTE_PCI_SLOT1_PIN 11
-
-#define COYOTE_PCI_SLOT0_DEVID 14
-#define COYOTE_PCI_SLOT1_DEVID 15
-
-#define COYOTE_IDE_BASE_PHYS IXP4XX_EXP_BUS_CS3_BASE_PHYS
-#define COYOTE_IDE_BASE_VIRT 0xFFFE1000
-#define COYOTE_IDE_REGION_SIZE 0x1000
-
-#define COYOTE_IDE_DATA_PORT 0xFFFE10E0
-#define COYOTE_IDE_CTRL_PORT 0xFFFE10FC
-#define COYOTE_IDE_ERROR_PORT 0xFFFE10E2
-
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/hardware.h
- *
- * Copyright (C) 2002 Intel Corporation.
- * Copyright (C) 2003-2004 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-/*
- * Hardware definitions for IXP4xx based systems
- */
-
-#ifndef __ASM_ARCH_HARDWARE_H__
-#define __ASM_ARCH_HARDWARE_H__
-
-#define PCIBIOS_MIN_IO 0x00001000
-#define PCIBIOS_MIN_MEM 0x48000000
-
-/*
- * We override the standard dma-mask routines for bouncing.
- */
-#define HAVE_ARCH_PCI_SET_DMA_MASK
-
-#define pcibios_assign_all_busses() 1
-
-/* Register locations and bits */
-#include "ixp4xx-regs.h"
-
-/* Platform helper functions and definitions */
-#include "platform.h"
-
-/* Platform specific details */
-#include "ixdp425.h"
-#include "coyote.h"
-#include "prpmc1100.h"
-
-#endif /* _ASM_ARCH_HARDWARE_H */
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/irqs.h
- *
- * IRQ definitions for IXP4XX based systems
- *
- * Copyright (C) 2002 Intel Corporation.
- * Copyright (C) 2003 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#ifndef _ARCH_IXP4XX_IRQS_H_
-#define _ARCH_IXP4XX_IRQS_H_
-
-#define NR_IRQS 32
-
-#define IRQ_IXP4XX_NPEA 0
-#define IRQ_IXP4XX_NPEB 1
-#define IRQ_IXP4XX_NPEC 2
-#define IRQ_IXP4XX_QM1 3
-#define IRQ_IXP4XX_QM2 4
-#define IRQ_IXP4XX_TIMER1 5
-#define IRQ_IXP4XX_GPIO0 6
-#define IRQ_IXP4XX_GPIO1 7
-#define IRQ_IXP4XX_PCI_INT 8
-#define IRQ_IXP4XX_PCI_DMA1 9
-#define IRQ_IXP4XX_PCI_DMA2 10
-#define IRQ_IXP4XX_TIMER2 11
-#define IRQ_IXP4XX_USB 12
-#define IRQ_IXP4XX_UART2 13
-#define IRQ_IXP4XX_TIMESTAMP 14
-#define IRQ_IXP4XX_UART1 15
-#define IRQ_IXP4XX_WDOG 16
-#define IRQ_IXP4XX_AHB_PMU 17
-#define IRQ_IXP4XX_XSCALE_PMU 18
-#define IRQ_IXP4XX_GPIO2 19
-#define IRQ_IXP4XX_GPIO3 20
-#define IRQ_IXP4XX_GPIO4 21
-#define IRQ_IXP4XX_GPIO5 22
-#define IRQ_IXP4XX_GPIO6 23
-#define IRQ_IXP4XX_GPIO7 24
-#define IRQ_IXP4XX_GPIO8 25
-#define IRQ_IXP4XX_GPIO9 26
-#define IRQ_IXP4XX_GPIO10 27
-#define IRQ_IXP4XX_GPIO11 28
-#define IRQ_IXP4XX_GPIO12 29
-#define IRQ_IXP4XX_SW_INT1 30
-#define IRQ_IXP4XX_SW_INT2 31
-
-#define XSCALE_PMU_IRQ (IRQ_IXP4XX_XSCALE_PMU)
-
-/*
- * IXDP425 board IRQs
- */
-#define IRQ_IXDP425_PCI_INTA IRQ_IXP4XX_GPIO11
-#define IRQ_IXDP425_PCI_INTB IRQ_IXP4XX_GPIO10
-#define IRQ_IXDP425_PCI_INTC IRQ_IXP4XX_GPIO9
-#define IRQ_IXDP425_PCI_INTD IRQ_IXP4XX_GPIO8
-
-/*
- * PrPMC1100 Board IRQs
- */
-#define IRQ_PRPMC1100_PCI_INTA IRQ_IXP4XX_GPIO11
-#define IRQ_PRPMC1100_PCI_INTB IRQ_IXP4XX_GPIO10
-#define IRQ_PRPMC1100_PCI_INTC IRQ_IXP4XX_GPIO9
-#define IRQ_PRPMC1100_PCI_INTD IRQ_IXP4XX_GPIO8
-
-/*
- * ADI Coyote Board IRQs
- */
-#define IRQ_COYOTE_PCI_SLOT0 IRQ_IXP4XX_GPIO6
-#define IRQ_COYOTE_PCI_SLOT1 IRQ_IXP4XX_GPIO11
-#define IRQ_COYOTE_IDE IRQ_IXP4XX_GPIO5
-
-#endif
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/ixdp425.h
- *
- * IXDP425 platform specific definitions
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#ifndef __ASM_ARCH_HARDWARE_H__
-#error "Do not include this directly, instead #include <asm/hardware.h>"
-#endif
-
-#define IXDP425_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define IXDP425_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
-#define IXDP425_SDA_PIN 7
-#define IXDP425_SCL_PIN 6
-
-/*
- * IXDP425 PCI IRQs
- */
-#define IXDP425_PCI_MAX_DEV 4
-#define IXDP425_PCI_IRQ_LINES 4
-
-
-/* PCI controller GPIO to IRQ pin mappings */
-#define IXDP425_PCI_INTA_PIN 11
-#define IXDP425_PCI_INTB_PIN 10
-#define IXDP425_PCI_INTC_PIN 9
-#define IXDP425_PCI_INTD_PIN 8
-
-
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
- *
- * Register definitions for IXP4xx chipset. This file contains
- * register location and bit definitions only. Platform specific
- * definitions and helper function declarations are in platform.h
- * and machine-name.h.
- *
- * Copyright (C) 2002 Intel Corporation.
- * Copyright (C) 2003-2004 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#ifndef __ASM_ARCH_HARDWARE_H__
-#error "Do not include this directly, instead #include <asm/hardware.h>"
-#endif
-
-#ifndef _ASM_ARM_IXP4XX_H_
-#define _ASM_ARM_IXP4XX_H_
-
-/*
- * IXP4xx Linux Memory Map:
- *
- * Phy Size Virt Description
- * =========================================================================
- *
- * 0x00000000 0x10000000(max) PAGE_OFFSET System RAM
- *
- * 0x48000000 0x04000000 ioremap'd PCI Memory Space
- *
- * 0x50000000 0x10000000 ioremap'd EXP BUS
- *
- * 0x6000000 0x00004000 ioremap'd QMgr
- *
- * 0xC0000000 0x00001000 0xffbfe000 PCI CFG
- *
- * 0xC4000000 0x00001000 0xffbfd000 EXP CFG
- *
- * 0xC8000000 0x0000C000 0xffbf2000 On-Chip Peripherals
- */
-
-
-/*
- * Expansion BUS Configuration registers
- */
-#define IXP4XX_EXP_CFG_BASE_PHYS (0xC4000000)
-#define IXP4XX_EXP_CFG_BASE_VIRT (0xFFBFD000)
-#define IXP4XX_EXP_CFG_REGION_SIZE (0x00001000)
-
-/*
- * PCI Config registers
- */
-#define IXP4XX_PCI_CFG_BASE_PHYS (0xC0000000)
-#define IXP4XX_PCI_CFG_BASE_VIRT (0xFFBFD000)
-#define IXP4XX_PCI_CFG_REGION_SIZE (0x00001000)
-
-/*
- * Peripheral space
- */
-#define IXP4XX_PERIPHERAL_BASE_PHYS (0xC8000000)
-#define IXP4XX_PERIPHERAL_BASE_VIRT (0xFFBF2000)
-#define IXP4XX_PERIPHERAL_REGION_SIZE (0x0000C000)
-
-#define IXP4XX_EXP_CS0_OFFSET 0x00
-#define IXP4XX_EXP_CS1_OFFSET 0x04
-#define IXP4XX_EXP_CS2_OFFSET 0x08
-#define IXP4XX_EXP_CS3_OFFSET 0x0C
-#define IXP4XX_EXP_CS4_OFFSET 0x10
-#define IXP4XX_EXP_CS5_OFFSET 0x14
-#define IXP4XX_EXP_CS6_OFFSET 0x18
-#define IXP4XX_EXP_CS7_OFFSET 0x1C
-#define IXP4XX_EXP_CFG0_OFFSET 0x20
-#define IXP4XX_EXP_CFG1_OFFSET 0x24
-#define IXP4XX_EXP_CFG2_OFFSET 0x28
-#define IXP4XX_EXP_CFG3_OFFSET 0x2C
-
-/*
- * Expansion Bus Controller registers.
- */
-#define IXP4XX_EXP_REG(x) ((volatile u32 *)(IXP4XX_EXP_CFG_BASE_VIRT+(x)))
-
-#define IXP4XX_EXP_CS0 IXP4XX_EXP_REG(IXP4XX_EXP_CS0_OFFSET)
-#define IXP4XX_EXP_CS1 IXP4XX_EXP_REG(IXP4XX_EXP_CS1_OFFSET)
-#define IXP4XX_EXP_CS2 IXP4XX_EXP_REG(IXP4XX_EXP_CS2_OFFSET)
-#define IXP4XX_EXP_CS3 IXP4XX_EXP_REG(IXP4XX_EXP_CS3_OFFSET)
-#define IXP4XX_EXP_CS4 IXP4XX_EXP_REG(IXP4XX_EXP_CS4_OFFSET)
-#define IXP4XX_EXP_CS5 IXP4XX_EXP_REG(IXP4XX_EXP_CS5_OFFSET)
-#define IXP4XX_EXP_CS6 IXP4XX_EXP_REG(IXP4XX_EXP_CS6_OFFSET)
-#define IXP4XX_EXP_CS7 IXP4XX_EXP_REG(IXP4XX_EXP_CS7_OFFSET)
-
-#define IXP4XX_EXP_CFG0 IXP4XX_EXP_REG(IXP4XX_EXP_CFG0_OFFSET)
-#define IXP4XX_EXP_CFG1 IXP4XX_EXP_REG(IXP4XX_EXP_CFG1_OFFSET)
-#define IXP4XX_EXP_CFG2 IXP4XX_EXP_REG(IXP4XX_EXP_CFG2_OFFSET)
-#define IXP4XX_EXP_CFG3 IXP4XX_EXP_REG(IXP4XX_EXP_CFG3_OFFSET)
-
-
-/*
- * Peripheral Space Register Region Base Addresses
- */
-#define IXP4XX_UART1_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x0000)
-#define IXP4XX_UART2_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x1000)
-#define IXP4XX_PMU_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x2000)
-#define IXP4XX_INTC_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x3000)
-#define IXP4XX_GPIO_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x4000)
-#define IXP4XX_TIMER_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x5000)
-#define IXP4XX_USB_BASE_PHYS (IXP4XX_PERIPHERAL_BASE_PHYS + 0x5000)
-
-#define IXP4XX_UART1_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x0000)
-#define IXP4XX_UART2_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x1000)
-#define IXP4XX_PMU_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x2000)
-#define IXP4XX_INTC_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x3000)
-#define IXP4XX_GPIO_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x4000)
-#define IXP4XX_TIMER_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x5000)
-#define IXP4XX_USB_BASE_VIRT (IXP4XX_PERIPHERAL_BASE_VIRT + 0x5000)
-
-/*
- * Constants to make it easy to access Interrupt Controller registers
- */
-#define IXP4XX_ICPR_OFFSET 0x00 /* Interrupt Status */
-#define IXP4XX_ICMR_OFFSET 0x04 /* Interrupt Enable */
-#define IXP4XX_ICLR_OFFSET 0x08 /* Interrupt IRQ/FIQ Select */
-#define IXP4XX_ICIP_OFFSET 0x0C /* IRQ Status */
-#define IXP4XX_ICFP_OFFSET 0x10 /* FIQ Status */
-#define IXP4XX_ICHR_OFFSET 0x14 /* Interrupt Priority */
-#define IXP4XX_ICIH_OFFSET 0x18 /* IRQ Highest Pri Int */
-#define IXP4XX_ICFH_OFFSET 0x1C /* FIQ Highest Pri Int */
-
-/*
- * Interrupt Controller Register Definitions.
- */
-
-#define IXP4XX_INTC_REG(x) ((volatile u32 *)(IXP4XX_INTC_BASE_VIRT+(x)))
-
-#define IXP4XX_ICPR IXP4XX_INTC_REG(IXP4XX_ICPR_OFFSET)
-#define IXP4XX_ICMR IXP4XX_INTC_REG(IXP4XX_ICMR_OFFSET)
-#define IXP4XX_ICLR IXP4XX_INTC_REG(IXP4XX_ICLR_OFFSET)
-#define IXP4XX_ICIP IXP4XX_INTC_REG(IXP4XX_ICIP_OFFSET)
-#define IXP4XX_ICFP IXP4XX_INTC_REG(IXP4XX_ICFP_OFFSET)
-#define IXP4XX_ICHR IXP4XX_INTC_REG(IXP4XX_ICHR_OFFSET)
-#define IXP4XX_ICIH IXP4XX_INTC_REG(IXP4XX_ICIH_OFFSET)
-#define IXP4XX_ICFH IXP4XX_INTC_REG(IXP4XX_ICFH_OFFSET)
-
-/*
- * Constants to make it easy to access GPIO registers
- */
-#define IXP4XX_GPIO_GPOUTR_OFFSET 0x00
-#define IXP4XX_GPIO_GPOER_OFFSET 0x04
-#define IXP4XX_GPIO_GPINR_OFFSET 0x08
-#define IXP4XX_GPIO_GPISR_OFFSET 0x0C
-#define IXP4XX_GPIO_GPIT1R_OFFSET 0x10
-#define IXP4XX_GPIO_GPIT2R_OFFSET 0x14
-#define IXP4XX_GPIO_GPCLKR_OFFSET 0x18
-#define IXP4XX_GPIO_GPDBSELR_OFFSET 0x1C
-
-/*
- * GPIO Register Definitions.
- * [Only perform 32bit reads/writes]
- */
-#define IXP4XX_GPIO_REG(x) ((volatile u32 *)(IXP4XX_GPIO_BASE_VIRT+(x)))
-
-#define IXP4XX_GPIO_GPOUTR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPOUTR_OFFSET)
-#define IXP4XX_GPIO_GPOER IXP4XX_GPIO_REG(IXP4XX_GPIO_GPOER_OFFSET)
-#define IXP4XX_GPIO_GPINR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPINR_OFFSET)
-#define IXP4XX_GPIO_GPISR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPISR_OFFSET)
-#define IXP4XX_GPIO_GPIT1R IXP4XX_GPIO_REG(IXP4XX_GPIO_GPIT1R_OFFSET)
-#define IXP4XX_GPIO_GPIT2R IXP4XX_GPIO_REG(IXP4XX_GPIO_GPIT2R_OFFSET)
-#define IXP4XX_GPIO_GPCLKR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPCLKR_OFFSET)
-#define IXP4XX_GPIO_GPDBSELR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPDBSELR_OFFSET)
-
-/*
- * GPIO register bit definitions
- */
-
-/* Interrupt styles
- */
-#define IXP4XX_GPIO_STYLE_ACTIVE_HIGH 0x0
-#define IXP4XX_GPIO_STYLE_ACTIVE_LOW 0x1
-#define IXP4XX_GPIO_STYLE_RISING_EDGE 0x2
-#define IXP4XX_GPIO_STYLE_FALLING_EDGE 0x3
-#define IXP4XX_GPIO_STYLE_TRANSITIONAL 0x4
-
-/*
- * Mask used to clear interrupt styles
- */
-#define IXP4XX_GPIO_STYLE_CLEAR 0x7
-#define IXP4XX_GPIO_STYLE_SIZE 3
-
-/*
- * Constants to make it easy to access Timer Control/Status registers
- */
-#define IXP4XX_OSTS_OFFSET 0x00 /* Continious TimeStamp */
-#define IXP4XX_OST1_OFFSET 0x04 /* Timer 1 Timestamp */
-#define IXP4XX_OSRT1_OFFSET 0x08 /* Timer 1 Reload */
-#define IXP4XX_OST2_OFFSET 0x0C /* Timer 2 Timestamp */
-#define IXP4XX_OSRT2_OFFSET 0x10 /* Timer 2 Reload */
-#define IXP4XX_OSWT_OFFSET 0x14 /* Watchdog Timer */
-#define IXP4XX_OSWE_OFFSET 0x18 /* Watchdog Enable */
-#define IXP4XX_OSWK_OFFSET 0x1C /* Watchdog Key */
-#define IXP4XX_OSST_OFFSET 0x20 /* Timer Status */
-
-/*
- * Operating System Timer Register Definitions.
- */
-
-#define IXP4XX_TIMER_REG(x) ((volatile u32 *)(IXP4XX_TIMER_BASE_VIRT+(x)))
-
-#define IXP4XX_OSTS IXP4XX_TIMER_REG(IXP4XX_OSTS_OFFSET)
-#define IXP4XX_OST1 IXP4XX_TIMER_REG(IXP4XX_OST1_OFFSET)
-#define IXP4XX_OSRT1 IXP4XX_TIMER_REG(IXP4XX_OSRT1_OFFSET)
-#define IXP4XX_OST2 IXP4XX_TIMER_REG(IXP4XX_OST2_OFFSET)
-#define IXP4XX_OSRT2 IXP4XX_TIMER_REG(IXP4XX_OSRT2_OFFSET)
-#define IXP4XX_OSWT IXP4XX_TIMER_REG(IXP4XX_OSWT_OFFSET)
-#define IXP4XX_OSWE IXP4XX_TIMER_REG(IXP4XX_OSWE_OFFSET)
-#define IXP4XX_OSWK IXP4XX_TIMER_REG(IXP4XX_OSWK_OFFSET)
-#define IXP4XX_OSST IXP4XX_TIMER_REG(IXP4XX_OSST_OFFSET)
-
-/*
- * Timer register values and bit definitions
- */
-#define IXP4XX_OST_ENABLE 0x00000001
-#define IXP4XX_OST_ONE_SHOT 0x00000002
-/* Low order bits of reload value ignored */
-#define IXP4XX_OST_RELOAD_MASK 0x00000003
-#define IXP4XX_OST_DISABLED 0x00000000
-#define IXP4XX_OSST_TIMER_1_PEND 0x00000001
-#define IXP4XX_OSST_TIMER_2_PEND 0x00000002
-#define IXP4XX_OSST_TIMER_TS_PEND 0x00000004
-#define IXP4XX_OSST_TIMER_WDOG_PEND 0x00000008
-#define IXP4XX_OSST_TIMER_WARM_RESET 0x00000010
-
-#define IXP4XX_WDT_KEY 0x0000482E
-
-#define IXP4XX_WDT_RESET_ENABLE 0x00000001
-#define IXP4XX_WDT_IRQ_ENABLE 0x00000002
-#define IXP4XX_WDT_COUNT_ENABLE 0x00000004
-
-
-/*
- * Constants to make it easy to access PCI Control/Status registers
- */
-#define PCI_NP_AD_OFFSET 0x00
-#define PCI_NP_CBE_OFFSET 0x04
-#define PCI_NP_WDATA_OFFSET 0x08
-#define PCI_NP_RDATA_OFFSET 0x0c
-#define PCI_CRP_AD_CBE_OFFSET 0x10
-#define PCI_CRP_WDATA_OFFSET 0x14
-#define PCI_CRP_RDATA_OFFSET 0x18
-#define PCI_CSR_OFFSET 0x1c
-#define PCI_ISR_OFFSET 0x20
-#define PCI_INTEN_OFFSET 0x24
-#define PCI_DMACTRL_OFFSET 0x28
-#define PCI_AHBMEMBASE_OFFSET 0x2c
-#define PCI_AHBIOBASE_OFFSET 0x30
-#define PCI_PCIMEMBASE_OFFSET 0x34
-#define PCI_AHBDOORBELL_OFFSET 0x38
-#define PCI_PCIDOORBELL_OFFSET 0x3C
-#define PCI_ATPDMA0_AHBADDR_OFFSET 0x40
-#define PCI_ATPDMA0_PCIADDR_OFFSET 0x44
-#define PCI_ATPDMA0_LENADDR_OFFSET 0x48
-#define PCI_ATPDMA1_AHBADDR_OFFSET 0x4C
-#define PCI_ATPDMA1_PCIADDR_OFFSET 0x50
-#define PCI_ATPDMA1_LENADDR_OFFSET 0x54
-
-/*
- * PCI Control/Status Registers
- */
-#define IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE_VIRT+(x)))
-
-#define PCI_NP_AD IXP4XX_PCI_CSR(PCI_NP_AD_OFFSET)
-#define PCI_NP_CBE IXP4XX_PCI_CSR(PCI_NP_CBE_OFFSET)
-#define PCI_NP_WDATA IXP4XX_PCI_CSR(PCI_NP_WDATA_OFFSET)
-#define PCI_NP_RDATA IXP4XX_PCI_CSR(PCI_NP_RDATA_OFFSET)
-#define PCI_CRP_AD_CBE IXP4XX_PCI_CSR(PCI_CRP_AD_CBE_OFFSET)
-#define PCI_CRP_WDATA IXP4XX_PCI_CSR(PCI_CRP_WDATA_OFFSET)
-#define PCI_CRP_RDATA IXP4XX_PCI_CSR(PCI_CRP_RDATA_OFFSET)
-#define PCI_CSR IXP4XX_PCI_CSR(PCI_CSR_OFFSET)
-#define PCI_ISR IXP4XX_PCI_CSR(PCI_ISR_OFFSET)
-#define PCI_INTEN IXP4XX_PCI_CSR(PCI_INTEN_OFFSET)
-#define PCI_DMACTRL IXP4XX_PCI_CSR(PCI_DMACTRL_OFFSET)
-#define PCI_AHBMEMBASE IXP4XX_PCI_CSR(PCI_AHBMEMBASE_OFFSET)
-#define PCI_AHBIOBASE IXP4XX_PCI_CSR(PCI_AHBIOBASE_OFFSET)
-#define PCI_PCIMEMBASE IXP4XX_PCI_CSR(PCI_PCIMEMBASE_OFFSET)
-#define PCI_AHBDOORBELL IXP4XX_PCI_CSR(PCI_AHBDOORBELL_OFFSET)
-#define PCI_PCIDOORBELL IXP4XX_PCI_CSR(PCI_PCIDOORBELL_OFFSET)
-#define PCI_ATPDMA0_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_AHBADDR_OFFSET)
-#define PCI_ATPDMA0_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_PCIADDR_OFFSET)
-#define PCI_ATPDMA0_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_LENADDR_OFFSET)
-#define PCI_ATPDMA1_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_AHBADDR_OFFSET)
-#define PCI_ATPDMA1_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_PCIADDR_OFFSET)
-#define PCI_ATPDMA1_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_LENADDR_OFFSET)
-
-/*
- * PCI register values and bit definitions
- */
-
-/* CSR bit definitions */
-#define PCI_CSR_HOST 0x00000001
-#define PCI_CSR_ARBEN 0x00000002
-#define PCI_CSR_ADS 0x00000004
-#define PCI_CSR_PDS 0x00000008
-#define PCI_CSR_ABE 0x00000010
-#define PCI_CSR_DBT 0x00000020
-#define PCI_CSR_ASE 0x00000100
-#define PCI_CSR_IC 0x00008000
-
-/* ISR (Interrupt status) Register bit definitions */
-#define PCI_ISR_PSE 0x00000001
-#define PCI_ISR_PFE 0x00000002
-#define PCI_ISR_PPE 0x00000004
-#define PCI_ISR_AHBE 0x00000008
-#define PCI_ISR_APDC 0x00000010
-#define PCI_ISR_PADC 0x00000020
-#define PCI_ISR_ADB 0x00000040
-#define PCI_ISR_PDB 0x00000080
-
-/* INTEN (Interrupt Enable) Register bit definitions */
-#define PCI_INTEN_PSE 0x00000001
-#define PCI_INTEN_PFE 0x00000002
-#define PCI_INTEN_PPE 0x00000004
-#define PCI_INTEN_AHBE 0x00000008
-#define PCI_INTEN_APDC 0x00000010
-#define PCI_INTEN_PADC 0x00000020
-#define PCI_INTEN_ADB 0x00000040
-#define PCI_INTEN_PDB 0x00000080
-
-/*
- * Shift value for byte enable on NP cmd/byte enable register
- */
-#define IXP4XX_PCI_NP_CBE_BESL 4
-
-/*
- * PCI commands supported by NP access unit
- */
-#define NP_CMD_IOREAD 0x2
-#define NP_CMD_IOWRITE 0x3
-#define NP_CMD_CONFIGREAD 0xa
-#define NP_CMD_CONFIGWRITE 0xb
-#define NP_CMD_MEMREAD 0x6
-#define NP_CMD_MEMWRITE 0x7
-
-/*
- * Constants for CRP access into local config space
- */
-#define CRP_AD_CBE_BESL 20
-#define CRP_AD_CBE_WRITE 0x00010000
-
-
-/*
- * USB Device Controller
- *
- * These are used by the USB gadget driver, so they don't follow the
- * IXP4XX_ naming convetions.
- *
- */
-# define IXP4XX_USB_REG(x) (*((volatile u32 *)(x)))
-
-/* UDC Undocumented - Reserved1 */
-#define UDC_RES1 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0004)
-/* UDC Undocumented - Reserved2 */
-#define UDC_RES2 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0008)
-/* UDC Undocumented - Reserved3 */
-#define UDC_RES3 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x000C)
-/* UDC Control Register */
-#define UDCCR IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0000)
-/* UDC Endpoint 0 Control/Status Register */
-#define UDCCS0 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0010)
-/* UDC Endpoint 1 (IN) Control/Status Register */
-#define UDCCS1 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0014)
-/* UDC Endpoint 2 (OUT) Control/Status Register */
-#define UDCCS2 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0018)
-/* UDC Endpoint 3 (IN) Control/Status Register */
-#define UDCCS3 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x001C)
-/* UDC Endpoint 4 (OUT) Control/Status Register */
-#define UDCCS4 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0020)
-/* UDC Endpoint 5 (Interrupt) Control/Status Register */
-#define UDCCS5 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0024)
-/* UDC Endpoint 6 (IN) Control/Status Register */
-#define UDCCS6 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0028)
-/* UDC Endpoint 7 (OUT) Control/Status Register */
-#define UDCCS7 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x002C)
-/* UDC Endpoint 8 (IN) Control/Status Register */
-#define UDCCS8 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0030)
-/* UDC Endpoint 9 (OUT) Control/Status Register */
-#define UDCCS9 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0034)
-/* UDC Endpoint 10 (Interrupt) Control/Status Register */
-#define UDCCS10 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0038)
-/* UDC Endpoint 11 (IN) Control/Status Register */
-#define UDCCS11 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x003C)
-/* UDC Endpoint 12 (OUT) Control/Status Register */
-#define UDCCS12 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0040)
-/* UDC Endpoint 13 (IN) Control/Status Register */
-#define UDCCS13 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0044)
-/* UDC Endpoint 14 (OUT) Control/Status Register */
-#define UDCCS14 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0048)
-/* UDC Endpoint 15 (Interrupt) Control/Status Register */
-#define UDCCS15 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x004C)
-/* UDC Frame Number Register High */
-#define UFNRH IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0060)
-/* UDC Frame Number Register Low */
-#define UFNRL IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0064)
-/* UDC Byte Count Reg 2 */
-#define UBCR2 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0068)
-/* UDC Byte Count Reg 4 */
-#define UBCR4 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x006c)
-/* UDC Byte Count Reg 7 */
-#define UBCR7 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0070)
-/* UDC Byte Count Reg 9 */
-#define UBCR9 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0074)
-/* UDC Byte Count Reg 12 */
-#define UBCR12 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0078)
-/* UDC Byte Count Reg 14 */
-#define UBCR14 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x007c)
-/* UDC Endpoint 0 Data Register */
-#define UDDR0 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0080)
-/* UDC Endpoint 1 Data Register */
-#define UDDR1 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0100)
-/* UDC Endpoint 2 Data Register */
-#define UDDR2 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0180)
-/* UDC Endpoint 3 Data Register */
-#define UDDR3 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0200)
-/* UDC Endpoint 4 Data Register */
-#define UDDR4 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0400)
-/* UDC Endpoint 5 Data Register */
-#define UDDR5 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x00A0)
-/* UDC Endpoint 6 Data Register */
-#define UDDR6 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0600)
-/* UDC Endpoint 7 Data Register */
-#define UDDR7 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0680)
-/* UDC Endpoint 8 Data Register */
-#define UDDR8 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0700)
-/* UDC Endpoint 9 Data Register */
-#define UDDR9 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0900)
-/* UDC Endpoint 10 Data Register */
-#define UDDR10 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x00C0)
-/* UDC Endpoint 11 Data Register */
-#define UDDR11 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0B00)
-/* UDC Endpoint 12 Data Register */
-#define UDDR12 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0B80)
-/* UDC Endpoint 13 Data Register */
-#define UDDR13 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0C00)
-/* UDC Endpoint 14 Data Register */
-#define UDDR14 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0E00)
-/* UDC Endpoint 15 Data Register */
-#define UDDR15 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x00E0)
-/* UDC Interrupt Control Register 0 */
-#define UICR0 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0050)
-/* UDC Interrupt Control Register 1 */
-#define UICR1 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0054)
-/* UDC Status Interrupt Register 0 */
-#define USIR0 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x0058)
-/* UDC Status Interrupt Register 1 */
-#define USIR1 IXP4XX_USB_REG(IXP4XX_USB_BASE_VIRT+0x005C)
-
-#define UDCCR_UDE (1 << 0) /* UDC enable */
-#define UDCCR_UDA (1 << 1) /* UDC active */
-#define UDCCR_RSM (1 << 2) /* Device resume */
-#define UDCCR_RESIR (1 << 3) /* Resume interrupt request */
-#define UDCCR_SUSIR (1 << 4) /* Suspend interrupt request */
-#define UDCCR_SRM (1 << 5) /* Suspend/resume interrupt mask */
-#define UDCCR_RSTIR (1 << 6) /* Reset interrupt request */
-#define UDCCR_REM (1 << 7) /* Reset interrupt mask */
-
-#define UDCCS0_OPR (1 << 0) /* OUT packet ready */
-#define UDCCS0_IPR (1 << 1) /* IN packet ready */
-#define UDCCS0_FTF (1 << 2) /* Flush Tx FIFO */
-#define UDCCS0_DRWF (1 << 3) /* Device remote wakeup feature */
-#define UDCCS0_SST (1 << 4) /* Sent stall */
-#define UDCCS0_FST (1 << 5) /* Force stall */
-#define UDCCS0_RNE (1 << 6) /* Receive FIFO no empty */
-#define UDCCS0_SA (1 << 7) /* Setup active */
-
-#define UDCCS_BI_TFS (1 << 0) /* Transmit FIFO service */
-#define UDCCS_BI_TPC (1 << 1) /* Transmit packet complete */
-#define UDCCS_BI_FTF (1 << 2) /* Flush Tx FIFO */
-#define UDCCS_BI_TUR (1 << 3) /* Transmit FIFO underrun */
-#define UDCCS_BI_SST (1 << 4) /* Sent stall */
-#define UDCCS_BI_FST (1 << 5) /* Force stall */
-#define UDCCS_BI_TSP (1 << 7) /* Transmit short packet */
-
-#define UDCCS_BO_RFS (1 << 0) /* Receive FIFO service */
-#define UDCCS_BO_RPC (1 << 1) /* Receive packet complete */
-#define UDCCS_BO_DME (1 << 3) /* DMA enable */
-#define UDCCS_BO_SST (1 << 4) /* Sent stall */
-#define UDCCS_BO_FST (1 << 5) /* Force stall */
-#define UDCCS_BO_RNE (1 << 6) /* Receive FIFO not empty */
-#define UDCCS_BO_RSP (1 << 7) /* Receive short packet */
-
-#define UDCCS_II_TFS (1 << 0) /* Transmit FIFO service */
-#define UDCCS_II_TPC (1 << 1) /* Transmit packet complete */
-#define UDCCS_II_FTF (1 << 2) /* Flush Tx FIFO */
-#define UDCCS_II_TUR (1 << 3) /* Transmit FIFO underrun */
-#define UDCCS_II_TSP (1 << 7) /* Transmit short packet */
-
-#define UDCCS_IO_RFS (1 << 0) /* Receive FIFO service */
-#define UDCCS_IO_RPC (1 << 1) /* Receive packet complete */
-#define UDCCS_IO_ROF (1 << 3) /* Receive overflow */
-#define UDCCS_IO_DME (1 << 3) /* DMA enable */
-#define UDCCS_IO_RNE (1 << 6) /* Receive FIFO not empty */
-#define UDCCS_IO_RSP (1 << 7) /* Receive short packet */
-
-#define UDCCS_INT_TFS (1 << 0) /* Transmit FIFO service */
-#define UDCCS_INT_TPC (1 << 1) /* Transmit packet complete */
-#define UDCCS_INT_FTF (1 << 2) /* Flush Tx FIFO */
-#define UDCCS_INT_TUR (1 << 3) /* Transmit FIFO underrun */
-#define UDCCS_INT_SST (1 << 4) /* Sent stall */
-#define UDCCS_INT_FST (1 << 5) /* Force stall */
-#define UDCCS_INT_TSP (1 << 7) /* Transmit short packet */
-
-#define UICR0_IM0 (1 << 0) /* Interrupt mask ep 0 */
-#define UICR0_IM1 (1 << 1) /* Interrupt mask ep 1 */
-#define UICR0_IM2 (1 << 2) /* Interrupt mask ep 2 */
-#define UICR0_IM3 (1 << 3) /* Interrupt mask ep 3 */
-#define UICR0_IM4 (1 << 4) /* Interrupt mask ep 4 */
-#define UICR0_IM5 (1 << 5) /* Interrupt mask ep 5 */
-#define UICR0_IM6 (1 << 6) /* Interrupt mask ep 6 */
-#define UICR0_IM7 (1 << 7) /* Interrupt mask ep 7 */
-
-#define UICR1_IM8 (1 << 0) /* Interrupt mask ep 8 */
-#define UICR1_IM9 (1 << 1) /* Interrupt mask ep 9 */
-#define UICR1_IM10 (1 << 2) /* Interrupt mask ep 10 */
-#define UICR1_IM11 (1 << 3) /* Interrupt mask ep 11 */
-#define UICR1_IM12 (1 << 4) /* Interrupt mask ep 12 */
-#define UICR1_IM13 (1 << 5) /* Interrupt mask ep 13 */
-#define UICR1_IM14 (1 << 6) /* Interrupt mask ep 14 */
-#define UICR1_IM15 (1 << 7) /* Interrupt mask ep 15 */
-
-#define USIR0_IR0 (1 << 0) /* Interrup request ep 0 */
-#define USIR0_IR1 (1 << 1) /* Interrup request ep 1 */
-#define USIR0_IR2 (1 << 2) /* Interrup request ep 2 */
-#define USIR0_IR3 (1 << 3) /* Interrup request ep 3 */
-#define USIR0_IR4 (1 << 4) /* Interrup request ep 4 */
-#define USIR0_IR5 (1 << 5) /* Interrup request ep 5 */
-#define USIR0_IR6 (1 << 6) /* Interrup request ep 6 */
-#define USIR0_IR7 (1 << 7) /* Interrup request ep 7 */
-
-#define USIR1_IR8 (1 << 0) /* Interrup request ep 8 */
-#define USIR1_IR9 (1 << 1) /* Interrup request ep 9 */
-#define USIR1_IR10 (1 << 2) /* Interrup request ep 10 */
-#define USIR1_IR11 (1 << 3) /* Interrup request ep 11 */
-#define USIR1_IR12 (1 << 4) /* Interrup request ep 12 */
-#define USIR1_IR13 (1 << 5) /* Interrup request ep 13 */
-#define USIR1_IR14 (1 << 6) /* Interrup request ep 14 */
-#define USIR1_IR15 (1 << 7) /* Interrup request ep 15 */
-
-#define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
-
-#endif
+++ /dev/null
-/*
- * include/asm-arm/arch-ixp4xx/prpmc1100.h
- *
- * Motorolla PrPMC1100 platform specific definitions
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#ifndef __ASM_ARCH_HARDWARE_H__
-#error "Do not include this directly, instead #include <asm/hardware.h>"
-#endif
-
-#define PRPMC1100_FLASH_BASE IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define PRPMC1100_FLASH_SIZE IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
-#define PRPMC1100_PCI_MIN_DEVID 10
-#define PRPMC1100_PCI_MAX_DEVID 16
-#define PRPMC1100_PCI_IRQ_LINES 4
-
-
-/* PCI controller GPIO to IRQ pin mappings */
-#define PRPMC1100_PCI_INTA_PIN 11
-#define PRPMC1100_PCI_INTB_PIN 10
-#define PRPMC1100_PCI_INTC_PIN 9
-#define PRPMC1100_PCI_INTD_PIN 8
-
-
+++ /dev/null
-/*
- * linux/include/asm-arm/arch-ixp4xx/timex.h
- *
- */
-
-#include <asm/hardware.h>
-
-/*
- * We use IXP425 General purpose timer for our timer needs, it runs at
- * 66.66... MHz
- */
-#define CLOCK_TICK_RATE (66666666)
-
+++ /dev/null
-/*
- * linux/include/asm-arm/arch-ixp4xx/vmalloc.h
- */
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
-#define VMALLOC_END (0xFF000000)
-
+++ /dev/null
-/*
- * linux/include/asm-arm/arch-pxa/mainstone.h
- *
- * Author: Nicolas Pitre
- * Created: Nov 14, 2002
- * Copyright: MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef ASM_ARCH_MAINSTONE_H
-#define ASM_ARCH_MAINSTONE_H
-
-#define MST_ETH_PHYS PXA_CS4_PHYS
-
-#define MST_FPGA_PHYS PXA_CS2_PHYS
-#define MST_FPGA_VIRT (0xf0000000)
-#define MST_P2V(x) ((x) - MST_FPGA_PHYS + MST_FPGA_VIRT)
-#define MST_V2P(x) ((x) - MST_FPGA_VIRT + MST_FPGA_PHYS)
-
-#ifndef __ASSEMBLY__
-# define __MST_REG(x) (*((volatile unsigned long *)MST_P2V(x)))
-#else
-# define __MST_REG(x) MST_P2V(x)
-#endif
-
-/* board level registers in the FPGA */
-
-#define MST_LEDDAT1 __MST_REG(0x08000010)
-#define MST_LEDDAT2 __MST_REG(0x08000014)
-#define MST_LEDCTRL __MST_REG(0x08000040)
-#define MST_GPSWR __MST_REG(0x08000060)
-#define MST_MSCWR1 __MST_REG(0x08000080)
-#define MST_MSCWR2 __MST_REG(0x08000084)
-#define MST_MSCWR3 __MST_REG(0x08000088)
-#define MST_MSCRD __MST_REG(0x08000090)
-#define MST_INTMSKENA __MST_REG(0x080000c0)
-#define MST_INTSETCLR __MST_REG(0x080000d0)
-#define MST_PCMCIA0 __MST_REG(0x080000e0)
-#define MST_PCMCIA1 __MST_REG(0x080000e4)
-
-#define MST_MSCWR1_CAMERA_ON (1 << 15) /* Camera interface power control */
-#define MST_MSCWR1_CAMERA_SEL (1 << 14) /* Camera interface mux control */
-#define MST_MSCWR1_LCD_CTL (1 << 13) /* General-purpose LCD control */
-#define MST_MSCWR1_MS_ON (1 << 12) /* Memory Stick power control */
-#define MST_MSCWR1_MMC_ON (1 << 11) /* MultiMediaCard* power control */
-#define MST_MSCWR1_MS_SEL (1 << 10) /* SD/MS multiplexer control */
-#define MST_MSCWR1_BB_SEL (1 << 9) /* PCMCIA/Baseband multiplexer */
-#define MST_MSCWR1_BT_ON (1 << 8) /* Bluetooth UART transceiver */
-#define MST_MSCWR1_BTDTR (1 << 7) /* Bluetooth UART DTR */
-
-#define MST_MSCWR1_IRDA_MASK (3 << 5) /* IrDA transceiver mode */
-#define MST_MSCWR1_IRDA_FULL (0 << 5) /* full distance power */
-#define MST_MSCWR1_IRDA_OFF (1 << 5) /* shutdown */
-#define MST_MSCWR1_IRDA_MED (2 << 5) /* 2/3 distance power */
-#define MST_MSCWR1_IRDA_LOW (3 << 5) /* 1/3 distance power */
-
-#define MST_MSCWR1_IRDA_FIR (1 << 4) /* IrDA transceiver SIR/FIR */
-#define MST_MSCWR1_GREENLED (1 << 3) /* LED D1 control */
-#define MST_MSCWR1_PDC_CTL (1 << 2) /* reserved */
-#define MST_MSCWR1_MTR_ON (1 << 1) /* Silent alert motor */
-#define MST_MSCWR1_SYSRESET (1 << 0) /* System reset */
-
-#define MST_MSCWR2_USB_OTG_RST (1 << 6) /* USB On The Go reset */
-#define MST_MSCWR2_USB_OTG_SEL (1 << 5) /* USB On The Go control */
-#define MST_MSCWR2_nUSBC_SC (1 << 4) /* USB client soft connect control */
-#define MST_MSCWR2_I2S_SPKROFF (1 << 3) /* I2S CODEC amplifier control */
-#define MST_MSCWR2_AC97_SPKROFF (1 << 2) /* AC97 CODEC amplifier control */
-#define MST_MSCWR2_RADIO_PWR (1 << 1) /* Radio module power control */
-#define MST_MSCWR2_RADIO_WAKE (1 << 0) /* Radio module wake-up signal */
-
-#define MST_MSCWR3_GPIO_RESET_EN (1 << 2) /* Enable GPIO Reset */
-#define MST_MSCWR3_GPIO_RESET (1 << 1) /* Initiate a GPIO Reset */
-#define MST_MSCWR3_COMMS_SW_RESET (1 << 0) /* Communications Processor Reset Control */
-
-#define MST_MSCRD_nPENIRQ (1 << 9) /* ADI7873* nPENIRQ signal */
-#define MST_MSCRD_nMEMSTK_CD (1 << 8) /* Memory Stick detection signal */
-#define MST_MSCRD_nMMC_CD (1 << 7) /* SD/MMC card detection signal */
-#define MST_MSCRD_nUSIM_CD (1 << 6) /* USIM card detection signal */
-#define MST_MSCRD_USB_CBL (1 << 5) /* USB client cable status */
-#define MST_MSCRD_TS_BUSY (1 << 4) /* ADI7873 busy */
-#define MST_MSCRD_BTDSR (1 << 3) /* Bluetooth UART DSR */
-#define MST_MSCRD_BTRI (1 << 2) /* Bluetooth UART Ring Indicator */
-#define MST_MSCRD_BTDCD (1 << 1) /* Bluetooth UART DCD */
-#define MST_MSCRD_nMMC_WP (1 << 0) /* SD/MMC write-protect status */
-
-#define MST_INT_S1_IRQ (1 << 15) /* PCMCIA socket 1 IRQ */
-#define MST_INT_S1_STSCHG (1 << 14) /* PCMCIA socket 1 status changed */
-#define MST_INT_S1_CD (1 << 13) /* PCMCIA socket 1 card detection */
-#define MST_INT_S0_IRQ (1 << 11) /* PCMCIA socket 0 IRQ */
-#define MST_INT_S0_STSCHG (1 << 10) /* PCMCIA socket 0 status changed */
-#define MST_INT_S0_CD (1 << 9) /* PCMCIA socket 0 card detection */
-#define MST_INT_nEXBRD_INT (1 << 7) /* Expansion board IRQ */
-#define MST_INT_MSINS (1 << 6) /* Memory Stick* detection */
-#define MST_INT_PENIRQ (1 << 5) /* ADI7873* touch-screen IRQ */
-#define MST_INT_AC97 (1 << 4) /* AC'97 CODEC IRQ */
-#define MST_INT_ETHERNET (1 << 3) /* Ethernet controller IRQ */
-#define MST_INT_USBC (1 << 2) /* USB client cable detection IRQ */
-#define MST_INT_USIM (1 << 1) /* USIM card detection IRQ */
-#define MST_INT_MMC (1 << 0) /* MMC/SD card detection IRQ */
-
-#define MST_PCMCIA_nIRQ (1 << 10) /* IRQ / ready signal */
-#define MST_PCMCIA_nSPKR_BVD2 (1 << 9) /* VDD sense / digital speaker */
-#define MST_PCMCIA_nSTSCHG_BVD1 (1 << 8) /* VDD sense / card status changed */
-#define MST_PCMCIA_nVS2 (1 << 7) /* VSS voltage sense */
-#define MST_PCMCIA_nVS1 (1 << 6) /* VSS voltage sense */
-#define MST_PCMCIA_nCD (1 << 5) /* Card detection signal */
-#define MST_PCMCIA_RESET (1 << 4) /* Card reset signal */
-#define MST_PCMCIA_PWR_MASK (0x000f) /* MAX1602 power-supply controls */
-
-#define MST_PCMCIA_PWR_VPP_0 0x0 /* voltage VPP = 0V */
-#define MST_PCMCIA_PWR_VPP_120 0x2 /* voltage VPP = 12V*/
-#define MST_PCMCIA_PWR_VPP_VCC 0x1 /* voltage VPP = VCC */
-#define MST_PCMCIA_PWR_VCC_0 0x0 /* voltage VCC = 0V */
-#define MST_PCMCIA_PWR_VCC_33 0x8 /* voltage VCC = 3.3V */
-#define MST_PCMCIA_PWR_VCC_50 0x4 /* voltage VCC = 5.0V */
-
-#endif
+++ /dev/null
-#ifndef _ASM_ARM_RELAY_H
-#define _ASM_ARM_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_ARM_RELAY_H
-#define _ASM_ARM_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#include <asm-generic/local.h>
+++ /dev/null
-#ifndef _ASM_CRIS_RELAY_H
-#define _ASM_CRIS_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _CRIS_SECTIONS_H
-#define _CRIS_SECTIONS_H
-
-/* nothing to see, move along */
-#include <asm-generic/sections.h>
-
-#endif
+++ /dev/null
-#ifndef _ASM_GENERIC_RELAY_H
-#define _ASM_GENERIC_RELAY_H
-/*
- * linux/include/asm-generic/relay.h
- *
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 2002 - Karim Yaghmour (karim@opersys.com)
- *
- * Architecture-independent definitions for relayfs
- */
-
-#include <linux/relayfs_fs.h>
-
-/**
- * get_time_delta - utility function for getting time delta
- * @now: pointer to a timeval struct that may be given current time
- * @rchan: the channel
- *
- * Returns the time difference between the current time and the buffer
- * start time.
- */
-static inline u32
-get_time_delta(struct timeval *now, struct rchan *rchan)
-{
- u32 time_delta;
-
- do_gettimeofday(now);
- time_delta = calc_time_delta(now, &rchan->buf_start_time);
-
- return time_delta;
-}
-
-/**
- * get_timestamp - utility function for getting a time and TSC pair
- * @now: current time
- * @tsc: the TSC associated with now
- * @rchan: the channel
- *
- * Sets the value pointed to by now to the current time. Value pointed to
- * by tsc is not set since there is no generic TSC support.
- */
-static inline void
-get_timestamp(struct timeval *now,
- u32 *tsc,
- struct rchan *rchan)
-{
- do_gettimeofday(now);
-}
-
-/**
- * get_time_or_tsc: - Utility function for getting a time or a TSC.
- * @now: current time
- * @tsc: current TSC
- * @rchan: the channel
- *
- * Sets the value pointed to by now to the current time.
- */
-static inline void
-get_time_or_tsc(struct timeval *now,
- u32 *tsc,
- struct rchan *rchan)
-{
- do_gettimeofday(now);
-}
-
-/**
- * have_tsc - does this platform have a useable TSC?
- *
- * Returns 0.
- */
-static inline int
-have_tsc(void)
-{
- return 0;
-}
-#endif
+++ /dev/null
-#ifndef _ASM_H8300_RELAY_H
-#define _ASM_H8300_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/*
- * 8253/8254 Programmable Interval Timer
- */
-
-#ifndef _8253PIT_H
-#define _8253PIT_H
-
-#include <asm/timex.h>
-
-#define PIT_TICK_RATE CLOCK_TICK_RATE
-
-#endif
+++ /dev/null
-#ifndef _ASM_I386_RELAY_H
-#define _ASM_I386_RELAY_H
-/*
- * linux/include/asm-i386/relay.h
- *
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 2002 - Karim Yaghmour (karim@opersys.com)
- *
- * i386 definitions for relayfs
- */
-
-#include <linux/relayfs_fs.h>
-
-#ifdef CONFIG_X86_TSC
-#include <asm/msr.h>
-
-/**
- * get_time_delta - utility function for getting time delta
- * @now: pointer to a timeval struct that may be given current time
- * @rchan: the channel
- *
- * Returns either the TSC if TSCs are being used, or the time and the
- * time difference between the current time and the buffer start time
- * if TSCs are not being used.
- */
-static inline u32
-get_time_delta(struct timeval *now, struct rchan *rchan)
-{
- u32 time_delta;
-
- if ((using_tsc(rchan) == 1) && cpu_has_tsc)
- rdtscl(time_delta);
- else {
- do_gettimeofday(now);
- time_delta = calc_time_delta(now, &rchan->buf_start_time);
- }
-
- return time_delta;
-}
-
-/**
- * get_timestamp - utility function for getting a time and TSC pair
- * @now: current time
- * @tsc: the TSC associated with now
- * @rchan: the channel
- *
- * Sets the value pointed to by now to the current time and the value
- * pointed to by tsc to the tsc associated with that time, if the
- * platform supports TSC.
- */
-static inline void
-get_timestamp(struct timeval *now,
- u32 *tsc,
- struct rchan *rchan)
-{
- do_gettimeofday(now);
-
- if ((using_tsc(rchan) == 1) && cpu_has_tsc)
- rdtscl(*tsc);
-}
-
-/**
- * get_time_or_tsc - utility function for getting a time or a TSC
- * @now: current time
- * @tsc: current TSC
- * @rchan: the channel
- *
- * Sets the value pointed to by now to the current time or the value
- * pointed to by tsc to the current tsc, depending on whether we're
- * using TSCs or not.
- */
-static inline void
-get_time_or_tsc(struct timeval *now,
- u32 *tsc,
- struct rchan *rchan)
-{
- if ((using_tsc(rchan) == 1) && cpu_has_tsc)
- rdtscl(*tsc);
- else
- do_gettimeofday(now);
-}
-
-/**
- * have_tsc - does this platform have a useable TSC?
- *
- * Returns 1 if this platform has a useable TSC counter for
- * timestamping purposes, 0 otherwise.
- */
-static inline int
-have_tsc(void)
-{
- if (cpu_has_tsc)
- return 1;
- else
- return 0;
-}
-
-#else /* No TSC support (#ifdef CONFIG_X86_TSC) */
-#include <asm-generic/relay.h>
-#endif /* #ifdef CONFIG_X86_TSC */
-#endif
+++ /dev/null
-#ifndef _ASM_IA64_CPU_H_
-#define _ASM_IA64_CPU_H_
-
-#include <linux/device.h>
-#include <linux/cpu.h>
-#include <linux/topology.h>
-#include <linux/percpu.h>
-
-struct ia64_cpu {
- struct cpu cpu;
-};
-
-DECLARE_PER_CPU(struct ia64_cpu, cpu_devices);
-
-DECLARE_PER_CPU(int, cpu_state);
-
-#endif /* _ASM_IA64_CPU_H_ */
+++ /dev/null
-#ifndef _ASM_IA64_RELAY_H
-#define _ASM_IA64_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_M68K_RELAY_H
-#define _ASM_M68K_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_M68KNOMMU_RELAY_H
-#define _ASM_M68KNOMMU_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/*
- * 8253/8254 Programmable Interval Timer
- */
-
-#ifndef _8253PIT_H
-#define _8253PIT_H
-
-#define PIT_TICK_RATE 1193182UL
-
-#endif
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004 by Ralf Baechle
- */
-#ifndef _ASM_PMON_H
-#define _ASM_PMON_H
-
-struct callvectors {
- int (*open) (char*, int, int); /* 0 */
- int (*close) (int); /* 4 */
- int (*read) (int, void*, int); /* 8 */
- int (*write) (int, void*, int); /* 12 */
- off_t (*lseek) (int, off_t, int); /* 16 */
- int (*printf) (const char*, ...); /* 20 */
- void (*cacheflush) (void); /* 24 */
- char* (*gets) (char*); /* 28 */
-};
-
-#endif /* _ASM_PMON_H */
+++ /dev/null
-#ifndef _ASM_RELAY_H
-#define _ASM_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_RELAY_H
-#define _ASM_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_PARISC_RELAY_H
-#define _ASM_PARISC_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _UNWIND_H_
-#define _UNWIND_H_
-
-/* From ABI specifications */
-struct unwind_table_entry {
- unsigned int region_start;
- unsigned int region_end;
- unsigned int Cannot_unwind:1; /* 0 */
- unsigned int Millicode:1; /* 1 */
- unsigned int Millicode_save_sr0:1; /* 2 */
- unsigned int Region_description:2; /* 3..4 */
- unsigned int reserved1:1; /* 5 */
- unsigned int Entry_SR:1; /* 6 */
- unsigned int Entry_FR:4; /* number saved *//* 7..10 */
- unsigned int Entry_GR:5; /* number saved *//* 11..15 */
- unsigned int Args_stored:1; /* 16 */
- unsigned int Variable_Frame:1; /* 17 */
- unsigned int Separate_Package_Body:1; /* 18 */
- unsigned int Frame_Extension_Millicode:1; /* 19 */
- unsigned int Stack_Overflow_Check:1; /* 20 */
- unsigned int Two_Instruction_SP_Increment:1; /* 21 */
- unsigned int Ada_Region:1; /* 22 */
- unsigned int cxx_info:1; /* 23 */
- unsigned int cxx_try_catch:1; /* 24 */
- unsigned int sched_entry_seq:1; /* 25 */
- unsigned int reserved2:1; /* 26 */
- unsigned int Save_SP:1; /* 27 */
- unsigned int Save_RP:1; /* 28 */
- unsigned int Save_MRP_in_frame:1; /* 29 */
- unsigned int extn_ptr_defined:1; /* 30 */
- unsigned int Cleanup_defined:1; /* 31 */
-
- unsigned int MPE_XL_interrupt_marker:1; /* 0 */
- unsigned int HP_UX_interrupt_marker:1; /* 1 */
- unsigned int Large_frame:1; /* 2 */
- unsigned int Pseudo_SP_Set:1; /* 3 */
- unsigned int reserved4:1; /* 4 */
- unsigned int Total_frame_size:27; /* 5..31 */
-};
-
-struct unwind_table {
- struct unwind_table *next;
- const char *name;
- unsigned long gp;
- unsigned long base_addr;
- unsigned long start;
- unsigned long end;
- const struct unwind_table_entry *table;
- unsigned long length;
-};
-
-struct unwind_frame_info {
- unsigned long sp;
- unsigned long ip;
- struct task_struct *t;
- /* Eventually we would like to be able to get at any of the registers
- available; but for now we only try to get the sp and ip for each
- frame */
- /* struct pt_regs regs; */
- unsigned long prev_sp, prev_ip;
-};
-
-void * unwind_table_add(const char *name, unsigned long base_addr,
- unsigned long gp,
- const void *start, const void *end);
-void unwind_frame_init(struct unwind_frame_info *info, struct task_struct *t,
- struct pt_regs *regs);
-void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct task_struct *t);
-int unwind_once(struct unwind_frame_info *info);
-int unwind_to_user(struct unwind_frame_info *info);
-
-#endif
+++ /dev/null
-/*
- * ibm_ocp.h
- *
- * (c) Benjamin Herrenschmidt (benh@kernel.crashing.org)
- * Mipsys - France
- *
- * Derived from work (c) Armin Kuster akuster@pacbell.net
- *
- * Additional support and port to 2.6 LDM/sysfs by
- * Matt Porter <mporter@kernel.crashing.org>
- * Copyright 2003-2004 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-#ifdef __KERNEL__
-#ifndef __IBM_OCP_H__
-#define __IBM_OCP_H__
-
-#include <asm/types.h>
-
-/*
- * IBM 4xx OCP system information
- */
-struct ocp_sys_info_data {
- int opb_bus_freq; /* OPB Bus Frequency (Hz) */
- int ebc_bus_freq; /* EBC Bus Frequency (Hz) */
-};
-
-extern struct ocp_sys_info_data ocp_sys_info;
-
-/*
- * EMAC additional data and sysfs support
- *
- * Note about mdio_idx: When you have a zmii, it's usually
- * not necessary, it covers the case of the 405EP which has
- * the MDIO lines on EMAC0 only
- *
- * Note about phy_map: Per EMAC map of PHY ids which should
- * be probed by emac_probe. Different EMACs can have
- * overlapping maps.
- *
- * Note, this map uses inverse logic for bits:
- * 0 - id should be probed
- * 1 - id should be ignored
- *
- * Default value of 0x00000000 - will result in usual
- * auto-detection logic.
- *
- */
-
-struct ocp_func_emac_data {
- int rgmii_idx; /* RGMII device index or -1 */
- int rgmii_mux; /* RGMII input of this EMAC */
- int zmii_idx; /* ZMII device index or -1 */
- int zmii_mux; /* ZMII input of this EMAC */
- int mal_idx; /* MAL device index */
- int mal_rx_chan; /* MAL rx channel number */
- int mal_tx_chan; /* MAL tx channel number */
- int wol_irq; /* WOL interrupt */
- int mdio_idx; /* EMAC idx of MDIO master or -1 */
- int tah_idx; /* TAH device index or -1 */
- int jumbo; /* Jumbo frames capable flag */
- int phy_mode; /* PHY type or configurable mode */
- u8 mac_addr[6]; /* EMAC mac address */
- u32 phy_map; /* EMAC phy map */
-};
-
-/* Sysfs support */
-#define OCP_SYSFS_EMAC_DATA() \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, zmii_idx) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, zmii_mux) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, mal_idx) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, mal_rx_chan) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, mal_tx_chan) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, wol_irq) \
-OCP_SYSFS_ADDTL(struct ocp_func_emac_data, "%d\n", emac, mdio_idx) \
- \
-void ocp_show_emac_data(struct device *dev) \
-{ \
- device_create_file(dev, &dev_attr_emac_zmii_idx); \
- device_create_file(dev, &dev_attr_emac_zmii_mux); \
- device_create_file(dev, &dev_attr_emac_mal_idx); \
- device_create_file(dev, &dev_attr_emac_mal_rx_chan); \
- device_create_file(dev, &dev_attr_emac_mal_tx_chan); \
- device_create_file(dev, &dev_attr_emac_wol_irq); \
- device_create_file(dev, &dev_attr_emac_mdio_idx); \
-}
-
-#ifdef CONFIG_40x
-/*
- * Helper function to copy MAC addresses from the bd_t to OCP EMAC
- * additions.
- *
- * The range of EMAC indices (inclusive) to be copied are the arguments.
- */
-static inline void ibm_ocp_set_emac(int start, int end)
-{
- int i;
- struct ocp_def *def;
-
- /* Copy MAC addresses to EMAC additions */
- for (i=start; i<=end; i++) {
- def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
- memcpy(((struct ocp_func_emac_data *)def->additions)->mac_addr,
- &__res.bi_enetaddr[i],
- 6);
- }
-}
-#endif
-
-/*
- * MAL additional data and sysfs support
- */
-struct ocp_func_mal_data {
- int num_tx_chans; /* Number of TX channels */
- int num_rx_chans; /* Number of RX channels */
- int txeob_irq; /* TX End Of Buffer IRQ */
- int rxeob_irq; /* RX End Of Buffer IRQ */
- int txde_irq; /* TX Descriptor Error IRQ */
- int rxde_irq; /* RX Descriptor Error IRQ */
- int serr_irq; /* MAL System Error IRQ */
-};
-
-#define OCP_SYSFS_MAL_DATA() \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, num_tx_chans) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, num_rx_chans) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, txeob_irq) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, rxeob_irq) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, txde_irq) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, rxde_irq) \
-OCP_SYSFS_ADDTL(struct ocp_func_mal_data, "%d\n", mal, serr_irq) \
- \
-void ocp_show_mal_data(struct device *dev) \
-{ \
- device_create_file(dev, &dev_attr_mal_num_tx_chans); \
- device_create_file(dev, &dev_attr_mal_num_rx_chans); \
- device_create_file(dev, &dev_attr_mal_txeob_irq); \
- device_create_file(dev, &dev_attr_mal_rxeob_irq); \
- device_create_file(dev, &dev_attr_mal_txde_irq); \
- device_create_file(dev, &dev_attr_mal_rxde_irq); \
- device_create_file(dev, &dev_attr_mal_serr_irq); \
-}
-
-/*
- * IIC additional data and sysfs support
- */
-struct ocp_func_iic_data {
- int fast_mode; /* IIC fast mode enabled */
-};
-
-#define OCP_SYSFS_IIC_DATA() \
-OCP_SYSFS_ADDTL(struct ocp_func_iic_data, "%d\n", iic, fast_mode) \
- \
-void ocp_show_iic_data(struct device *dev) \
-{ \
- device_create_file(dev, &dev_attr_iic_fast_mode); \
-}
-#endif /* __IBM_OCP_H__ */
-#endif /* __KERNEL__ */
+++ /dev/null
-#ifndef _ASM_PPC_RELAY_H
-#define _ASM_PPC_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_PPC64_RELAY_H
-#define _ASM_PPC64_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_S390_RELAY_H
-#define _ASM_S390_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_SH_RELAY_H
-#define _ASM_SH_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef _ASM_SPARC_RELAY_H
-#define _ASM_SPARC_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/* const.h: Macros for dealing with constants. */
-
-#ifndef _SPARC64_CONST_H
-#define _SPARC64_CONST_H
-
-/* Some constant macros are used in both assembler and
- * C code. Therefore we cannot annotate them always with
- * 'UL' and other type specificers unilaterally. We
- * use the following macros to deal with this.
- */
-
-#ifdef __ASSEMBLY__
-#define _AC(X,Y) X
-#else
-#define _AC(X,Y) (X##Y)
-#endif
-
-
-#endif /* !(_SPARC64_CONST_H) */
+++ /dev/null
-#ifndef _ASM_SPARC64_RELAY_H
-#define _ASM_SPARC64_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-#ifndef __UM_CPUFEATURE_H
-#define __UM_CPUFEATURE_H
-
-#include "asm/arch/cpufeature.h"
-
-#endif
+++ /dev/null
-#ifndef __UM_LOCAL_H
-#define __UM_LOCAL_H
-
-#include "asm/arch/local.h"
-
-#endif
+++ /dev/null
-#ifndef __UM_MODULE_GENERIC_H
-#define __UM_MODULE_GENERIC_H
-
-#include "asm/arch/module.h"
-
-#endif
+++ /dev/null
-#ifndef _UM_SECTIONS_H
-#define _UM_SECTIONS_H
-
-/* nothing to see, move along */
-#include <asm-generic/sections.h>
-
-#endif
+++ /dev/null
-#ifndef __V850_RELAY_H
-#define __V850_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/*
- * 8253/8254 Programmable Interval Timer
- */
-
-#ifndef _8253PIT_H
-#define _8253PIT_H
-
-#define PIT_TICK_RATE 1193182UL
-
-#endif
+++ /dev/null
-#ifndef _ASM_X86_64_RELAY_H
-#define _ASM_X86_64_RELAY_H
-
-#include <asm-generic/relay.h>
-#endif
+++ /dev/null
-/* ckrm.h - Class-based Kernel Resource Management (CKRM)
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003,2004
- * (C) Shailabh Nagar, IBM Corp. 2003
- * (C) Chandra Seetharaman, IBM Corp. 2003
- *
- *
- * Provides a base header file including macros and basic data structures.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 28 Aug 2003
- * Created.
- * 06 Nov 2003
- * Made modifications to suit the new RBCE module.
- * 10 Nov 2003
- * Added callbacks_active and surrounding logic. Added task paramter
- * for all CE callbacks.
- * 19 Nov 2004
- * New Event callback structure
- */
-
-#ifndef _LINUX_CKRM_H
-#define _LINUX_CKRM_H
-
-#ifdef CONFIG_CKRM
-
-// Data structure and function to get the list of registered
-// resource controllers.
-
-// #include <linux/sched.h>
-
-/* CKRM defines a set of events at particular points in the kernel
- * at which callbacks registered by various class types are called
- */
-
-enum ckrm_event {
- /* we distinguish various events types
- *
- * (a) CKRM_LATCHABLE_EVENTS
- * events can be latched for event callbacks by classtypes
- *
- * (b) CKRM_NONLATACHBLE_EVENTS
- * events can not be latched but can be used to call classification
- *
- * (c) event that are used for notification purposes
- * range: [ CKRM_EVENT_CANNOT_CLASSIFY .. )
- */
-
- /* events (a) */
-
- CKRM_LATCHABLE_EVENTS,
-
- CKRM_EVENT_NEWTASK = CKRM_LATCHABLE_EVENTS,
- CKRM_EVENT_FORK,
- CKRM_EVENT_EXIT,
- CKRM_EVENT_EXEC,
- CKRM_EVENT_UID,
- CKRM_EVENT_GID,
- CKRM_EVENT_LOGIN,
- CKRM_EVENT_USERADD,
- CKRM_EVENT_USERDEL,
- CKRM_EVENT_LISTEN_START,
- CKRM_EVENT_LISTEN_STOP,
- CKRM_EVENT_APPTAG,
-
- /* events (b) */
-
- CKRM_NONLATCHABLE_EVENTS,
-
- CKRM_EVENT_RECLASSIFY = CKRM_NONLATCHABLE_EVENTS,
-
- /* events (c) */
- CKRM_NOTCLASSIFY_EVENTS,
-
- CKRM_EVENT_MANUAL = CKRM_NOTCLASSIFY_EVENTS,
-
- CKRM_NUM_EVENTS
-};
-#endif
-
-#ifdef __KERNEL__
-#ifdef CONFIG_CKRM
-
-extern void ckrm_invoke_event_cb_chain(enum ckrm_event ev, void *arg);
-
-typedef void (*ckrm_event_cb)(void *arg);
-
-struct ckrm_hook_cb {
- ckrm_event_cb fct;
- struct ckrm_hook_cb *next;
-};
-
-#define CKRM_DEF_CB(EV,fct) \
-static inline void ckrm_cb_##fct(void) \
-{ \
- ckrm_invoke_event_cb_chain(CKRM_EVENT_##EV,NULL); \
-}
-
-#define CKRM_DEF_CB_ARG(EV,fct,argtp) \
-static inline void ckrm_cb_##fct(argtp arg) \
-{ \
- ckrm_invoke_event_cb_chain(CKRM_EVENT_##EV,(void*)arg); \
-}
-
-#else // !CONFIG_CKRM
-
-#define CKRM_DEF_CB(EV,fct) \
-static inline void ckrm_cb_##fct(void) { }
-
-#define CKRM_DEF_CB_ARG(EV,fct,argtp) \
-static inline void ckrm_cb_##fct(argtp arg) { }
-
-#endif // CONFIG_CKRM
-
-/*-----------------------------------------------------------------
- * define the CKRM event functions
- * EVENT FCT ARG
- *-----------------------------------------------------------------*/
-
-// types we refer at
-struct task_struct;
-struct sock;
-struct user_struct;
-
-CKRM_DEF_CB_ARG( FORK , fork, struct task_struct *);
-CKRM_DEF_CB_ARG( EXEC , exec, const char* );
-CKRM_DEF_CB ( UID , uid );
-CKRM_DEF_CB ( GID , gid );
-CKRM_DEF_CB ( APPTAG , apptag );
-CKRM_DEF_CB ( LOGIN , login );
-CKRM_DEF_CB_ARG( USERADD , useradd, struct user_struct *);
-CKRM_DEF_CB_ARG( USERDEL , userdel, struct user_struct *);
-CKRM_DEF_CB_ARG( LISTEN_START , listen_start, struct sock * );
-CKRM_DEF_CB_ARG( LISTEN_STOP , listen_stop, struct sock * );
-
-// and a few special one's
-void ckrm_cb_newtask(struct task_struct *);
-void ckrm_cb_exit(struct task_struct *);
-
-// some other functions required
-extern void ckrm_init(void);
-extern int get_exe_path_name(struct task_struct *, char *, int);
-
-#endif // __KERNEL__
-
-#endif // _LINUX_CKRM_H
+++ /dev/null
-/* ckrm_ce.h - Header file to be used by Classification Engine of CKRM
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003
- * (C) Shailabh Nagar, IBM Corp. 2003
- * (C) Chandra Seetharaman, IBM Corp. 2003
- *
- * Provides data structures, macros and kernel API of CKRM for
- * classification engine.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 12 Nov 2003
- * Created.
- * 22 Apr 2004
- * Adopted to classtypes
- */
-
-#ifndef _LINUX_CKRM_CE_H
-#define _LINUX_CKRM_CE_H
-
-#ifdef CONFIG_CKRM
-
-#include "ckrm.h" // getting the event names
-
-/* Action parameters identifying the cause of a task<->class notify callback
- * these can perculate up to user daemon consuming records send by the classification
- * engine
- */
-
-#ifdef __KERNEL__
-
-typedef void* (*ce_classify_fct_t)(enum ckrm_event event, void *obj, ... );
-typedef void (*ce_notify_fct_t) (enum ckrm_event event, void *classobj, void *obj);
-
-typedef struct ckrm_eng_callback {
- /* general state information */
- int always_callback; /* set if CE should always be called back regardless of numclasses */
-
- /* callbacks which are called without holding locks */
-
- unsigned long c_interest; /* set of classification events CE is interested in */
- ce_classify_fct_t classify; /* generic classify */
-
- void (*class_add) (const char *name, void *core); /* class added */
- void (*class_delete)(const char *name, void *core); /* class deleted */
-
- /* callback which are called while holding task_lock(tsk) */
- unsigned long n_interest; /* set of notification events CE is interested in */
- ce_notify_fct_t notify; /* notify on class switch */
-
-} ckrm_eng_callback_t;
-
-struct inode;
-struct dentry;
-
-typedef struct rbce_eng_callback {
- int (*mkdir)(struct inode *, struct dentry *, int); // mkdir
- int (*rmdir)(struct inode *, struct dentry *); // rmdir
-} rbce_eng_callback_t;
-
-extern int ckrm_register_engine (const char *name, ckrm_eng_callback_t *);
-extern int ckrm_unregister_engine(const char *name);
-
-extern void *ckrm_classobj(char *, int *classtype);
-extern int get_exe_path_name(struct task_struct *t, char *filename, int max_size);
-
-extern int rcfs_register_engine(rbce_eng_callback_t *);
-extern int rcfs_unregister_engine(rbce_eng_callback_t *);
-
-extern int ckrm_reclassify(int pid);
-
-#ifndef _LINUX_CKRM_RC_H
-// ckrm kernel has inlined functions for this which are exported
-extern void ckrm_core_grab(void *);
-extern void ckrm_core_drop(void *);
-#endif
-
-#endif // CONFIG_CKRM
-
-#endif // __KERNEL__
-
-#endif // _LINUX_CKRM_CE_H
+++ /dev/null
-/* ckrm_rc.h - Header file to be used by Resource controllers of CKRM
- *
- * Copyright (C) Vivek Kashyap , IBM Corp. 2004
- *
- * Provides data structures, macros and kernel API of CKRM for
- * resource controllers.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-#ifndef _LINUX_CKRM_NET_H
-#define _LINUX_CKRM_NET_H
-
-struct ckrm_sock_class;
-
-struct ckrm_net_struct {
- int ns_type; // type of net class
- struct sock *ns_sk; // pointer to socket
- pid_t ns_tgid; // real process id
- pid_t ns_pid; // calling thread's pid
- int ns_family; // IPPROTO_IPV4 || IPPROTO_IPV6
- // Currently only IPV4 is supported
- union {
- __u32 ns_dipv4; // V4 listener's address
- } ns_daddr;
- __u16 ns_dport; // listener's port
- __u16 ns_sport; // sender's port
- atomic_t ns_refcnt;
- struct ckrm_sock_class *core;
- struct list_head ckrm_link;
-};
-
-#define ns_daddrv4 ns_daddr.ns_dipv4
-
-#endif
+++ /dev/null
-/* ckrm_rc.h - Header file to be used by Resource controllers of CKRM
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003
- * (C) Shailabh Nagar, IBM Corp. 2003
- * (C) Chandra Seetharaman, IBM Corp. 2003
- * (C) Vivek Kashyap , IBM Corp. 2004
- *
- * Provides data structures, macros and kernel API of CKRM for
- * resource controllers.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 12 Nov 2003
- * Created.
- */
-
-#ifndef _LINUX_CKRM_RC_H
-#define _LINUX_CKRM_RC_H
-
-#ifdef __KERNEL__
-
-#ifdef CONFIG_CKRM
-
-#include <linux/list.h>
-#include <linux/ckrm.h>
-#include <linux/ckrm_ce.h>
-#include <linux/seq_file.h>
-
-
-/* maximum number of class types */
-#define CKRM_MAX_CLASSTYPES 32
-/* maximum classtype name length */
-#define CKRM_MAX_CLASSTYPE_NAME 32
-
-/* maximum resource controllers per classtype */
-#define CKRM_MAX_RES_CTLRS 8
-/* maximum resource controller name length */
-#define CKRM_MAX_RES_NAME 128
-
-
-struct ckrm_core_class;
-struct ckrm_classtype;
-
-/********************************************************************************
- * Share specifications
- *******************************************************************************/
-
-typedef struct ckrm_shares {
- int my_guarantee;
- int my_limit;
- int total_guarantee;
- int max_limit;
- int unused_guarantee; // not used as parameters
- int cur_max_limit; // not used as parameters
-} ckrm_shares_t;
-
-#define CKRM_SHARE_UNCHANGED (-1) // value to indicate no change
-#define CKRM_SHARE_DONTCARE (-2) // value to indicate don't care.
-#define CKRM_SHARE_DFLT_TOTAL_GUARANTEE (100) // Start off with these values
-#define CKRM_SHARE_DFLT_MAX_LIMIT (100) // to simplify set_res_shares logic
-
-
-/********************************************************************************
- * RESOURCE CONTROLLERS
- *******************************************************************************/
-
-/* resource controller callback structure */
-
-typedef struct ckrm_res_ctlr {
- char res_name[CKRM_MAX_RES_NAME];
- int res_hdepth; // maximum hierarchy
- int resid; // (for now) same as the enum resid
- struct ckrm_classtype *classtype; // classtype owning this resource controller
-
- /* allocate/free new resource class object for resource controller */
- void *(*res_alloc) (struct ckrm_core_class *this, struct ckrm_core_class *parent);
- void (*res_free) (void *);
-
- /* set/get limits/guarantees for a resource controller class */
- int (*set_share_values) (void* , struct ckrm_shares *shares);
- int (*get_share_values) (void* , struct ckrm_shares *shares);
-
- /* statistics and configuration access */
- int (*get_stats) (void* , struct seq_file *);
- int (*reset_stats) (void *);
- int (*show_config) (void* , struct seq_file *);
- int (*set_config) (void* , const char *cfgstr);
-
- void (*change_resclass)(void *, void *, void *);
-
-} ckrm_res_ctlr_t;
-
-/***************************************************************************************
- * CKRM_CLASSTYPE
- *
- * A <struct ckrm_classtype> object describes a dimension for CKRM to classify
- * along. I needs to provide methods to create and manipulate class objects in
- * this dimension
- ***************************************************************************************/
-
-/* list of predefined class types, we always recognize */
-#define CKRM_CLASSTYPE_TASK_CLASS 0
-#define CKRM_CLASSTYPE_SOCKET_CLASS 1
-#define CKRM_RESV_CLASSTYPES 2 /* always +1 of last known type */
-
-#define CKRM_MAX_TYPENAME_LEN 32
-
-
-typedef struct ckrm_classtype {
- /* Hubertus: Rearrange slots so that they are more cache friendly during access */
-
- /* resource controllers */
- spinlock_t res_ctlrs_lock; /* protect data below (other than atomics) */
- int max_res_ctlrs; /* maximum number of resource controller allowed */
- int max_resid; /* maximum resid used */
- int resid_reserved; /* maximum number of reserved controllers */
- long bit_res_ctlrs; /* bitmap of resource ID used */
- atomic_t nr_resusers[CKRM_MAX_RES_CTLRS];
- ckrm_res_ctlr_t* res_ctlrs[CKRM_MAX_RES_CTLRS];
-
- /* state about my classes */
-
- struct ckrm_core_class *default_class; // pointer to default class
- struct list_head classes; // listhead to link up all classes of this classtype
- int num_classes; // how many classes do exist
-
- /* state about my ce interaction */
- int ce_regd; // Has a CE been registered for this classtype
- int ce_cb_active; // are callbacks active
- atomic_t ce_nr_users; // how many transient calls active
- struct ckrm_eng_callback ce_callbacks; // callback engine
-
- // Begin classtype-rcfs private data. No rcfs/fs specific types used.
- int mfidx; // Index into genmfdesc array used to initialize
- // mfdesc and mfcount
- void *mfdesc; // Array of descriptors of root and magic files
- int mfcount; // length of above array
- void *rootde; // root dentry created by rcfs
- // End rcfs private data
-
- char name[CKRM_MAX_TYPENAME_LEN]; // currently same as mfdesc[0]->name but could be different
- int typeID; /* unique TypeID */
- int maxdepth; /* maximum depth supported */
-
- /* functions to be called on any class type by external API's */
- struct ckrm_core_class* (*alloc)(struct ckrm_core_class *parent, const char *name); /* alloc class instance */
- int (*free) (struct ckrm_core_class *cls); /* free class instance */
-
- int (*show_members)(struct ckrm_core_class *, struct seq_file *);
- int (*show_stats) (struct ckrm_core_class *, struct seq_file *);
- int (*show_config) (struct ckrm_core_class *, struct seq_file *);
- int (*show_shares) (struct ckrm_core_class *, struct seq_file *);
-
- int (*reset_stats) (struct ckrm_core_class *, const char *resname,
- const char *);
- int (*set_config) (struct ckrm_core_class *, const char *resname,
- const char *cfgstr);
- int (*set_shares) (struct ckrm_core_class *, const char *resname,
- struct ckrm_shares *shares);
- int (*forced_reclassify)(struct ckrm_core_class *, const char *);
-
-
- /* functions to be called on a class type by ckrm internals */
- void (*add_resctrl)(struct ckrm_core_class *, int resid); // class initialization for new RC
-
-} ckrm_classtype_t;
-
-/******************************************************************************************
- * CKRM CORE CLASS
- * common part to any class structure (i.e. instance of a classtype)
- ******************************************************************************************/
-
-/* basic definition of a hierarchy that is to be used by the the CORE classes
- * and can be used by the resource class objects
- */
-
-#define CKRM_CORE_MAGIC 0xBADCAFFE
-
-typedef struct ckrm_hnode {
- struct ckrm_core_class *parent;
- struct list_head siblings; /* linked list of siblings */
- struct list_head children; /* anchor for children */
-} ckrm_hnode_t;
-
-typedef struct ckrm_core_class {
- struct ckrm_classtype *classtype; // what type does this core class belong to
- void* res_class[CKRM_MAX_RES_CTLRS]; // pointer to array of resource classes
- spinlock_t class_lock; // to protect the list and the array above
- struct list_head objlist; // generic list for any object list to be maintained by class
- struct list_head clslist; // to link up all classes in a single list type wrt to type
- struct dentry *dentry; // dentry of inode in the RCFS
- int magic;
- struct ckrm_hnode hnode; // hierarchy
- rwlock_t hnode_rwlock; // rw_clock protecting the hnode above.
- atomic_t refcnt;
- const char *name;
- int delayed; // core deletion delayed because of race conditions
-} ckrm_core_class_t;
-
-/* type coerce between derived class types and ckrm core class type */
-#define class_type(type,coreptr) container_of(coreptr,type,core)
-#define class_core(clsptr) (&(clsptr)->core)
-/* locking classes */
-#define class_lock(coreptr) spin_lock(&(coreptr)->class_lock)
-#define class_unlock(coreptr) spin_unlock(&(coreptr)->class_lock)
-/* what type is a class of ISA */
-#define class_isa(clsptr) (class_core(clsptr)->classtype)
-
-
-/******************************************************************************************
- * OTHER
- ******************************************************************************************/
-
-#define ckrm_get_res_class(rescls,resid,type) ((type*)((rescls)->res_class[resid]))
-
-extern int ckrm_register_res_ctlr (struct ckrm_classtype *, ckrm_res_ctlr_t *);
-extern int ckrm_unregister_res_ctlr (ckrm_res_ctlr_t *);
-
-extern int ckrm_validate_and_grab_core(struct ckrm_core_class *core);
-extern int ckrm_init_core_class(struct ckrm_classtype *clstype,struct ckrm_core_class *dcore,
- struct ckrm_core_class *parent, const char *name);
-extern int ckrm_release_core_class(struct ckrm_core_class *); // Hubertus .. can disappear after cls del debugging
-extern struct ckrm_res_ctlr *ckrm_resctlr_lookup(struct ckrm_classtype *type, const char *resname);
-
-#if 0
-
-// Hubertus ... need to straighten out all these I don't think we will even call thsie ore are we
-
-/* interface to the RCFS filesystem */
-extern struct ckrm_core_class *ckrm_alloc_core_class(struct ckrm_core_class *, const char *, int);
-
-// Reclassify the given pid to the given core class by force
-extern void ckrm_forced_reclassify_pid(int, struct ckrm_core_class *);
-
-// Reclassify the given net_struct to the given core class by force
-extern void ckrm_forced_reclassify_laq(struct ckrm_net_struct *,
- struct ckrm_core_class *);
-
-#endif
-
-extern void ckrm_lock_hier(struct ckrm_core_class *);
-extern void ckrm_unlock_hier(struct ckrm_core_class *);
-extern struct ckrm_core_class * ckrm_get_next_child(struct ckrm_core_class *,
- struct ckrm_core_class *);
-
-extern void child_guarantee_changed(struct ckrm_shares *, int, int);
-extern void child_maxlimit_changed(struct ckrm_shares *, int);
-extern int set_shares(struct ckrm_shares *, struct ckrm_shares *, struct ckrm_shares *);
-
-/* classtype registration and lookup */
-extern int ckrm_register_classtype (struct ckrm_classtype *clstype);
-extern int ckrm_unregister_classtype(struct ckrm_classtype *clstype);
-extern struct ckrm_classtype* ckrm_find_classtype_by_name(const char *name);
-
-/* default functions that can be used in classtypes's function table */
-extern int ckrm_class_show_shares(struct ckrm_core_class *core, struct seq_file *seq);
-extern int ckrm_class_show_stats(struct ckrm_core_class *core, struct seq_file *seq);
-extern int ckrm_class_show_config(struct ckrm_core_class *core, struct seq_file *seq);
-extern int ckrm_class_set_config(struct ckrm_core_class *core, const char *resname, const char *cfgstr);
-extern int ckrm_class_set_shares(struct ckrm_core_class *core, const char *resname, struct ckrm_shares *shares);
-extern int ckrm_class_reset_stats(struct ckrm_core_class *core, const char *resname, const char *unused);
-
-#if 0
-extern void ckrm_ns_hold(struct ckrm_net_struct *);
-extern void ckrm_ns_put(struct ckrm_net_struct *);
-extern void *ckrm_set_rootcore_byname(char *, void *);
-#endif
-
-static inline void ckrm_core_grab(struct ckrm_core_class *core)
-{
- if (core) atomic_inc(&core->refcnt);
-}
-
-static inline void ckrm_core_drop(struct ckrm_core_class *core)
-{
- // only make definition available in this context
- extern void ckrm_free_core_class(struct ckrm_core_class *core);
- if (core && (atomic_dec_and_test(&core->refcnt)))
- ckrm_free_core_class(core);
-}
-
-static inline unsigned int
-ckrm_is_core_valid(ckrm_core_class_t *core)
-{
- return (core && (core->magic == CKRM_CORE_MAGIC));
-}
-
-// iterate through all associate resource controllers:
-// requires following arguments (ckrm_core_class *cls,
-// ckrm_res_ctrl *ctlr,
-// void *robj,
-// int bmap)
-#define forall_class_resobjs(cls,rcbs,robj,bmap) \
- for ( bmap=((cls->classtype)->bit_res_ctlrs) ; \
- ({ int rid; ((rid=ffs(bmap)-1) >= 0) && \
- (bmap&=~(1<<rid),((rcbs=cls->classtype->res_ctlrs[rid]) && (robj=cls->res_class[rid]))); }) ; \
- )
-
-extern struct ckrm_classtype* ckrm_classtypes[]; /* should provide a different interface */
-
-
-/*-----------------------------------------------------------------------------
- * CKRM event callback specification for the classtypes or resource controllers
- * typically an array is specified using CKRM_EVENT_SPEC terminated with
- * CKRM_EVENT_SPEC_LAST and then that array is registered using
- * ckrm_register_event_set.
- * Individual registration of event_cb is also possible
- *-----------------------------------------------------------------------------*/
-
-struct ckrm_event_spec {
- enum ckrm_event ev;
- struct ckrm_hook_cb cb;
-};
-#define CKRM_EVENT_SPEC(EV,FCT) { CKRM_EVENT_##EV, { (ckrm_event_cb)FCT, NULL } }
-
-int ckrm_register_event_set(struct ckrm_event_spec especs[]);
-int ckrm_unregister_event_set(struct ckrm_event_spec especs[]);
-int ckrm_register_event_cb(enum ckrm_event ev, struct ckrm_hook_cb *cb);
-int ckrm_unregister_event_cb(enum ckrm_event ev, struct ckrm_hook_cb *cb);
-
-/******************************************************************************************
- * CE Invocation interface
- ******************************************************************************************/
-
-#define ce_protect(ctype) (atomic_inc(&((ctype)->ce_nr_users)))
-#define ce_release(ctype) (atomic_dec(&((ctype)->ce_nr_users)))
-
-// CE Classification callbacks with
-
-#define CE_CLASSIFY_NORET(ctype, event, objs_to_classify...) \
-do { \
- if ((ctype)->ce_cb_active && (test_bit(event,&(ctype)->ce_callbacks.c_interest))) \
- (*(ctype)->ce_callbacks.classify)(event, objs_to_classify); \
-} while (0)
-
-#define CE_CLASSIFY_RET(ret, ctype, event, objs_to_classify...) \
-do { \
- if ((ctype)->ce_cb_active && (test_bit(event,&(ctype)->ce_callbacks.c_interest))) \
- ret = (*(ctype)->ce_callbacks.classify)(event, objs_to_classify); \
-} while (0)
-
-#define CE_NOTIFY(ctype, event, cls, objs_to_classify) \
-do { \
- if ((ctype)->ce_cb_active && (test_bit(event,&(ctype)->ce_callbacks.n_interest))) \
- (*(ctype)->ce_callbacks.notify)(event,cls,objs_to_classify); \
-} while (0)
-
-
-#endif // CONFIG_CKRM
-
-#endif // __KERNEL__
-
-#endif // _LINUX_CKRM_RC_H
-
-
-
-
-
+++ /dev/null
-#include <linux/ckrm_rc.h>
-
-
-
-#define TASK_CLASS_TYPE_NAME "taskclass"
-
-typedef struct ckrm_task_class {
- struct ckrm_core_class core;
-} ckrm_task_class_t;
-
-
-// Index into genmfdesc array, defined in rcfs/dir_modules.c,
-// which has the mfdesc entry that taskclass wants to use
-#define TC_MF_IDX 0
-
-
-extern int ckrm_forced_reclassify_pid(int pid, struct ckrm_task_class *cls);
-
+++ /dev/null
-/* ckrm_tsk.h - No. of tasks resource controller for CKRM
- *
- * Copyright (C) Chandra Seetharaman, IBM Corp. 2003
- *
- * Provides No. of tasks resource controller for CKRM
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 31 Mar 2004
- * Created.
- */
-
-#ifndef _LINUX_CKRM_TSK_H
-#define _LINUX_CKRM_TSK_H
-
-#include <linux/ckrm_rc.h>
-
-#ifdef CONFIG_CKRM_RES_NUMTASKS
-
-extern int numtasks_get_ref(void *, int);
-extern int numtasks_get_ref_resid(void *, int, int);
-extern void numtasks_put_ref(void *);
-
-#else
-
-#define numtasks_get_ref(a, b) 1
-#define numtasks_get_ref_resid(a, b, c) 1
-#define numtasks_put_ref(a)
-
-#endif
-
-#endif // _LINUX_CKRM_RES_H
+++ /dev/null
-/*
- * KLOG Generic Logging facility built upon the relayfs infrastructure
- *
- * Authors: Hubertus Frankeh (frankeh@us.ibm.com)
- * Tom Zanussi (zanussi@us.ibm.com)
- *
- * Please direct all questions/comments to zanussi@us.ibm.com
- *
- * Copyright (C) 2003, IBM Corp
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_KLOG_H
-#define _LINUX_KLOG_H
-
-extern int klog(const char *fmt, ...);
-extern int klog_raw(const char *buf,int len);
-
-#endif /* _LINUX_KLOG_H */
+++ /dev/null
-#ifndef _LINUX_PRIO_TREE_H
-#define _LINUX_PRIO_TREE_H
-
-struct prio_tree_node {
- struct prio_tree_node *left;
- struct prio_tree_node *right;
- struct prio_tree_node *parent;
-};
-
-struct prio_tree_root {
- struct prio_tree_node *prio_tree_node;
- unsigned int index_bits;
-};
-
-struct prio_tree_iter {
- struct prio_tree_node *cur;
- unsigned long mask;
- unsigned long value;
- int size_level;
-};
-
-#define INIT_PRIO_TREE_ROOT(ptr) \
-do { \
- (ptr)->prio_tree_node = NULL; \
- (ptr)->index_bits = 1; \
-} while (0)
-
-#define INIT_PRIO_TREE_NODE(ptr) \
-do { \
- (ptr)->left = (ptr)->right = (ptr)->parent = (ptr); \
-} while (0)
-
-#define INIT_PRIO_TREE_ITER(ptr) \
-do { \
- (ptr)->cur = NULL; \
- (ptr)->mask = 0UL; \
- (ptr)->value = 0UL; \
- (ptr)->size_level = 0; \
-} while (0)
-
-#define prio_tree_entry(ptr, type, member) \
- ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
-
-static inline int prio_tree_empty(const struct prio_tree_root *root)
-{
- return root->prio_tree_node == NULL;
-}
-
-static inline int prio_tree_root(const struct prio_tree_node *node)
-{
- return node->parent == node;
-}
-
-static inline int prio_tree_left_empty(const struct prio_tree_node *node)
-{
- return node->left == node;
-}
-
-static inline int prio_tree_right_empty(const struct prio_tree_node *node)
-{
- return node->right == node;
-}
-
-#endif /* _LINUX_PRIO_TREE_H */
+++ /dev/null
-#ifndef _LINUX_RCFS_H
-#define _LINUX_RCFS_H
-
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/ckrm.h>
-#include <linux/ckrm_rc.h>
-#include <linux/ckrm_ce.h>
-
-
-
-/* The following declarations cannot be included in any of ckrm*.h files without
- jumping hoops. Remove later when rearrangements done */
-
-// Hubertus .. taken out
-//extern ckrm_res_callback_t ckrm_res_ctlrs[CKRM_MAX_RES_CTLRS];
-
-#define RCFS_MAGIC 0x4feedbac
-#define RCFS_MAGF_NAMELEN 20
-extern int RCFS_IS_MAGIC;
-
-#define rcfs_is_magic(dentry) ((dentry)->d_fsdata == &RCFS_IS_MAGIC)
-
-typedef struct rcfs_inode_info {
- ckrm_core_class_t *core;
- char *name;
- struct inode vfs_inode;
-} rcfs_inode_info_t;
-
-#define RCFS_DEFAULT_DIR_MODE (S_IFDIR | S_IRUGO | S_IXUGO)
-#define RCFS_DEFAULT_FILE_MODE (S_IFREG | S_IRUSR | S_IWUSR | S_IRGRP |S_IROTH)
-
-
-struct rcfs_magf {
- char name[RCFS_MAGF_NAMELEN];
- int mode;
- struct inode_operations *i_op;
- struct file_operations *i_fop;
-};
-
-struct rcfs_mfdesc {
- struct rcfs_magf *rootmf; // Root directory and its magic files
- int rootmflen; // length of above array
- // Can have a different magf describing magic files for non-root entries too
-};
-
-extern struct rcfs_mfdesc *genmfdesc[];
-
-inline struct rcfs_inode_info *RCFS_I(struct inode *inode);
-
-int rcfs_empty(struct dentry *);
-struct inode *rcfs_get_inode(struct super_block *, int, dev_t);
-int rcfs_mknod(struct inode *, struct dentry *, int, dev_t);
-int _rcfs_mknod(struct inode *, struct dentry *, int , dev_t);
-int rcfs_mkdir(struct inode *, struct dentry *, int);
-ckrm_core_class_t *rcfs_make_core(struct dentry *, struct ckrm_core_class *);
-struct dentry *rcfs_set_magf_byname(char *, void *);
-
-struct dentry * rcfs_create_internal(struct dentry *, struct rcfs_magf *, int);
-int rcfs_delete_internal(struct dentry *);
-int rcfs_create_magic(struct dentry *, struct rcfs_magf *, int);
-int rcfs_clear_magic(struct dentry *);
-
-
-extern struct super_operations rcfs_super_ops;
-extern struct address_space_operations rcfs_aops;
-
-extern struct inode_operations rcfs_dir_inode_operations;
-extern struct inode_operations rcfs_rootdir_inode_operations;
-extern struct inode_operations rcfs_file_inode_operations;
-
-
-extern struct file_operations target_fileops;
-extern struct file_operations shares_fileops;
-extern struct file_operations stats_fileops;
-extern struct file_operations config_fileops;
-extern struct file_operations members_fileops;
-extern struct file_operations rcfs_file_operations;
-
-// Callbacks into rcfs from ckrm
-
-typedef struct rcfs_functions {
- int (* mkroot)(struct rcfs_magf *,int, struct dentry **);
- int (* rmroot)(struct dentry *);
- int (* register_classtype)(ckrm_classtype_t *);
- int (* deregister_classtype)(ckrm_classtype_t *);
-} rcfs_fn_t;
-
-int rcfs_register_classtype(ckrm_classtype_t *);
-int rcfs_deregister_classtype(ckrm_classtype_t *);
-int rcfs_mkroot(struct rcfs_magf *, int , struct dentry **);
-int rcfs_rmroot(struct dentry *);
-
-#define RCFS_ROOT "/rcfs" // Hubertus .. we should use the mount point instead of hardcoded
-extern struct dentry *rcfs_rootde;
-
-
-#endif /* _LINUX_RCFS_H */
+++ /dev/null
-/*
- * linux/include/linux/relayfs_fs.h
- *
- * Copyright (C) 2002, 2003 - Tom Zanussi (zanussi@us.ibm.com), IBM Corp
- * Copyright (C) 1999, 2000, 2001, 2002 - Karim Yaghmour (karim@opersys.com)
- *
- * RelayFS definitions and declarations
- *
- * Please see Documentation/filesystems/relayfs.txt for more info.
- */
-
-#ifndef _LINUX_RELAYFS_FS_H
-#define _LINUX_RELAYFS_FS_H
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/list.h>
-#include <linux/fs.h>
-
-/*
- * Tracks changes to rchan struct
- */
-#define RELAYFS_CHANNEL_VERSION 1
-
-/*
- * Maximum number of simultaneously open channels
- */
-#define RELAY_MAX_CHANNELS 256
-
-/*
- * Relay properties
- */
-#define RELAY_MIN_BUFS 2
-#define RELAY_MIN_BUFSIZE 4096
-#define RELAY_MAX_BUFS 256
-#define RELAY_MAX_BUF_SIZE 0x1000000
-#define RELAY_MAX_TOTAL_BUF_SIZE 0x8000000
-
-/*
- * Lockless scheme utility macros
- */
-#define RELAY_MAX_BUFNO(bufno_bits) (1UL << (bufno_bits))
-#define RELAY_BUF_SIZE(offset_bits) (1UL << (offset_bits))
-#define RELAY_BUF_OFFSET_MASK(offset_bits) (RELAY_BUF_SIZE(offset_bits) - 1)
-#define RELAY_BUFNO_GET(index, offset_bits) ((index) >> (offset_bits))
-#define RELAY_BUF_OFFSET_GET(index, mask) ((index) & (mask))
-#define RELAY_BUF_OFFSET_CLEAR(index, mask) ((index) & ~(mask))
-
-/*
- * Flags returned by relay_reserve()
- */
-#define RELAY_BUFFER_SWITCH_NONE 0x0
-#define RELAY_WRITE_DISCARD_NONE 0x0
-#define RELAY_BUFFER_SWITCH 0x1
-#define RELAY_WRITE_DISCARD 0x2
-#define RELAY_WRITE_TOO_LONG 0x4
-
-/*
- * Relay attribute flags
- */
-#define RELAY_DELIVERY_BULK 0x1
-#define RELAY_DELIVERY_PACKET 0x2
-#define RELAY_SCHEME_LOCKLESS 0x4
-#define RELAY_SCHEME_LOCKING 0x8
-#define RELAY_SCHEME_ANY 0xC
-#define RELAY_TIMESTAMP_TSC 0x10
-#define RELAY_TIMESTAMP_GETTIMEOFDAY 0x20
-#define RELAY_TIMESTAMP_ANY 0x30
-#define RELAY_USAGE_SMP 0x40
-#define RELAY_USAGE_GLOBAL 0x80
-#define RELAY_MODE_CONTINUOUS 0x100
-#define RELAY_MODE_NO_OVERWRITE 0x200
-
-/*
- * Flags for needs_resize() callback
- */
-#define RELAY_RESIZE_NONE 0x0
-#define RELAY_RESIZE_EXPAND 0x1
-#define RELAY_RESIZE_SHRINK 0x2
-#define RELAY_RESIZE_REPLACE 0x4
-#define RELAY_RESIZE_REPLACED 0x8
-
-/*
- * Values for fileop_notify() callback
- */
-enum relay_fileop
-{
- RELAY_FILE_OPEN,
- RELAY_FILE_CLOSE,
- RELAY_FILE_MAP,
- RELAY_FILE_UNMAP
-};
-
-/*
- * Data structure returned by relay_info()
- */
-struct rchan_info
-{
- u32 flags; /* relay attribute flags for channel */
- u32 buf_size; /* channel's sub-buffer size */
- char *buf_addr; /* address of channel start */
- u32 alloc_size; /* total buffer size actually allocated */
- u32 n_bufs; /* number of sub-buffers in channel */
- u32 cur_idx; /* current write index into channel */
- u32 bufs_produced; /* current count of sub-buffers produced */
- u32 bufs_consumed; /* current count of sub-buffers consumed */
- u32 buf_id; /* buf_id of current sub-buffer */
- int buffer_complete[RELAY_MAX_BUFS]; /* boolean per sub-buffer */
- int unused_bytes[RELAY_MAX_BUFS]; /* count per sub-buffer */
-};
-
-/*
- * Relay channel client callbacks
- */
-struct rchan_callbacks
-{
- /*
- * buffer_start - called at the beginning of a new sub-buffer
- * @rchan_id: the channel id
- * @current_write_pos: position in sub-buffer client should write to
- * @buffer_id: the id of the new sub-buffer
- * @start_time: the timestamp associated with the start of sub-buffer
- * @start_tsc: the TSC associated with the timestamp, if using_tsc
- * @using_tsc: boolean, indicates whether start_tsc is valid
- *
- * Return value should be the number of bytes written by the client.
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- int (*buffer_start) (int rchan_id,
- char *current_write_pos,
- u32 buffer_id,
- struct timeval start_time,
- u32 start_tsc,
- int using_tsc);
-
- /*
- * buffer_end - called at the end of a sub-buffer
- * @rchan_id: the channel id
- * @current_write_pos: position in sub-buffer of end of data
- * @end_of_buffer: the position of the end of the sub-buffer
- * @end_time: the timestamp associated with the end of the sub-buffer
- * @end_tsc: the TSC associated with the end_time, if using_tsc
- * @using_tsc: boolean, indicates whether end_tsc is valid
- *
- * Return value should be the number of bytes written by the client.
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- int (*buffer_end) (int rchan_id,
- char *current_write_pos,
- char *end_of_buffer,
- struct timeval end_time,
- u32 end_tsc,
- int using_tsc);
-
- /*
- * deliver - called when data is ready for the client
- * @rchan_id: the channel id
- * @from: the start of the delivered data
- * @len: the length of the delivered data
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- void (*deliver) (int rchan_id, char *from, u32 len);
-
- /*
- * user_deliver - called when data has been written from userspace
- * @rchan_id: the channel id
- * @from: the start of the delivered data
- * @len: the length of the delivered data
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- void (*user_deliver) (int rchan_id, char *from, u32 len);
-
- /*
- * needs_resize - called when a resizing event occurs
- * @rchan_id: the channel id
- * @resize_type: the type of resizing event
- * @suggested_buf_size: the suggested new sub-buffer size
- * @suggested_buf_size: the suggested new number of sub-buffers
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- void (*needs_resize)(int rchan_id,
- int resize_type,
- u32 suggested_buf_size,
- u32 suggested_n_bufs);
-
- /*
- * fileop_notify - called on open/close/mmap/munmap of a relayfs file
- * @rchan_id: the channel id
- * @filp: relayfs file pointer
- * @fileop: which file operation is in progress
- *
- * The return value can direct the outcome of the operation.
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- int (*fileop_notify)(int rchan_id,
- struct file *filp,
- enum relay_fileop fileop);
-
- /*
- * ioctl - called in ioctl context from userspace
- * @rchan_id: the channel id
- * @cmd: ioctl cmd
- * @arg: ioctl cmd arg
- *
- * The return value is returned as the value from the ioctl call.
- *
- * See Documentation/filesystems/relayfs.txt for details.
- */
- int (*ioctl) (int rchan_id, unsigned int cmd, unsigned long arg);
-};
-
-/*
- * Lockless scheme-specific data
- */
-struct lockless_rchan
-{
- u8 bufno_bits; /* # bits used for sub-buffer id */
- u8 offset_bits; /* # bits used for offset within sub-buffer */
- u32 index; /* current index = sub-buffer id and offset */
- u32 offset_mask; /* used to obtain offset portion of index */
- u32 index_mask; /* used to mask off unused bits index */
- atomic_t fill_count[RELAY_MAX_BUFS]; /* fill count per sub-buffer */
-};
-
-/*
- * Locking scheme-specific data
- */
-struct locking_rchan
-{
- char *write_buf; /* start of write sub-buffer */
- char *write_buf_end; /* end of write sub-buffer */
- char *current_write_pos; /* current write pointer */
- char *write_limit; /* takes reserves into account */
- char *in_progress_event_pos; /* used for interrupted writes */
- u16 in_progress_event_size; /* used for interrupted writes */
- char *interrupted_pos; /* used for interrupted writes */
- u16 interrupting_size; /* used for interrupted writes */
- spinlock_t lock; /* channel lock for locking scheme */
-};
-
-struct relay_ops;
-
-/*
- * Offset resizing data structure
- */
-struct resize_offset
-{
- u32 ge;
- u32 le;
- int delta;
-};
-
-/*
- * Relay channel data structure
- */
-struct rchan
-{
- u32 version; /* the version of this struct */
- char *buf; /* the channel buffer */
- union
- {
- struct lockless_rchan lockless;
- struct locking_rchan locking;
- } scheme; /* scheme-specific channel data */
-
- int id; /* the channel id */
- struct rchan_callbacks *callbacks; /* client callbacks */
- u32 flags; /* relay channel attributes */
- u32 buf_id; /* current sub-buffer id */
- u32 buf_idx; /* current sub-buffer index */
-
- atomic_t mapped; /* map count */
-
- atomic_t suspended; /* channel suspended i.e full? */
- int half_switch; /* used internally for suspend */
-
- struct timeval buf_start_time; /* current sub-buffer start time */
- u32 buf_start_tsc; /* current sub-buffer start TSC */
-
- u32 buf_size; /* sub-buffer size */
- u32 alloc_size; /* total buffer size allocated */
- u32 n_bufs; /* number of sub-buffers */
-
- u32 bufs_produced; /* count of sub-buffers produced */
- u32 bufs_consumed; /* count of sub-buffers consumed */
- u32 bytes_consumed; /* bytes consumed in cur sub-buffer */
-
- int initialized; /* first buffer initialized? */
- int finalized; /* channel finalized? */
-
- u32 start_reserve; /* reserve at start of sub-buffers */
- u32 end_reserve; /* reserve at end of sub-buffers */
- u32 rchan_start_reserve; /* additional reserve sub-buffer 0 */
-
- struct dentry *dentry; /* channel file dentry */
-
- wait_queue_head_t read_wait; /* VFS read wait queue */
- wait_queue_head_t write_wait; /* VFS write wait queue */
- struct work_struct wake_readers; /* reader wake-up work struct */
- struct work_struct wake_writers; /* reader wake-up work struct */
- atomic_t refcount; /* channel refcount */
-
- struct relay_ops *relay_ops; /* scheme-specific channel ops */
-
- int unused_bytes[RELAY_MAX_BUFS]; /* unused count per sub-buffer */
-
- struct semaphore resize_sem; /* serializes alloc/repace */
- struct work_struct work; /* resize allocation work struct */
-
- struct list_head open_readers; /* open readers for this channel */
- rwlock_t open_readers_lock; /* protection for open_readers list */
-
- char *init_buf; /* init channel buffer, if non-NULL */
-
- u32 resize_min; /* minimum resized total buffer size */
- u32 resize_max; /* maximum resized total buffer size */
- char *resize_buf; /* for autosize alloc/free */
- u32 resize_buf_size; /* resized sub-buffer size */
- u32 resize_n_bufs; /* resized number of sub-buffers */
- u32 resize_alloc_size; /* resized actual total size */
- int resizing; /* is resizing in progress? */
- int resize_err; /* resizing err code */
- int resize_failures; /* number of resize failures */
- int replace_buffer; /* is the alloced buffer ready? */
- struct resize_offset resize_offset; /* offset change */
- struct timer_list shrink_timer; /* timer used for shrinking */
- int resize_order; /* size of last resize */
- u32 expand_buf_id; /* subbuf id expand will occur at */
-
- struct page **buf_page_array; /* array of current buffer pages */
- int buf_page_count; /* number of current buffer pages */
- struct page **expand_page_array;/* new pages to be inserted */
- int expand_page_count; /* number of new pages */
- struct page **shrink_page_array;/* old pages to be freed */
- int shrink_page_count; /* number of old pages */
- struct page **resize_page_array;/* will become current pages */
- int resize_page_count; /* number of resize pages */
- struct page **old_buf_page_array; /* hold for freeing */
-} ____cacheline_aligned;
-
-/*
- * Relay channel reader struct
- */
-struct rchan_reader
-{
- struct list_head list; /* for list inclusion */
- struct rchan *rchan; /* the channel we're reading from */
- int auto_consume; /* does this reader auto-consume? */
- u32 bufs_consumed; /* buffers this reader has consumed */
- u32 bytes_consumed; /* bytes consumed in cur sub-buffer */
- int offset_changed; /* have channel offsets changed? */
- int vfs_reader; /* are we a VFS reader? */
- int map_reader; /* are we an mmap reader? */
-
- union
- {
- struct file *file;
- u32 f_pos;
- } pos; /* current read offset */
-};
-
-/*
- * These help make union member access less tedious
- */
-#define channel_buffer(rchan) ((rchan)->buf)
-#define idx(rchan) ((rchan)->scheme.lockless.index)
-#define bufno_bits(rchan) ((rchan)->scheme.lockless.bufno_bits)
-#define offset_bits(rchan) ((rchan)->scheme.lockless.offset_bits)
-#define offset_mask(rchan) ((rchan)->scheme.lockless.offset_mask)
-#define idx_mask(rchan) ((rchan)->scheme.lockless.index_mask)
-#define bulk_delivery(rchan) (((rchan)->flags & RELAY_DELIVERY_BULK) ? 1 : 0)
-#define packet_delivery(rchan) (((rchan)->flags & RELAY_DELIVERY_PACKET) ? 1 : 0)
-#define using_lockless(rchan) (((rchan)->flags & RELAY_SCHEME_LOCKLESS) ? 1 : 0)
-#define using_locking(rchan) (((rchan)->flags & RELAY_SCHEME_LOCKING) ? 1 : 0)
-#define using_tsc(rchan) (((rchan)->flags & RELAY_TIMESTAMP_TSC) ? 1 : 0)
-#define using_gettimeofday(rchan) (((rchan)->flags & RELAY_TIMESTAMP_GETTIMEOFDAY) ? 1 : 0)
-#define usage_smp(rchan) (((rchan)->flags & RELAY_USAGE_SMP) ? 1 : 0)
-#define usage_global(rchan) (((rchan)->flags & RELAY_USAGE_GLOBAL) ? 1 : 0)
-#define mode_continuous(rchan) (((rchan)->flags & RELAY_MODE_CONTINUOUS) ? 1 : 0)
-#define fill_count(rchan, i) ((rchan)->scheme.lockless.fill_count[(i)])
-#define write_buf(rchan) ((rchan)->scheme.locking.write_buf)
-#define read_buf(rchan) ((rchan)->scheme.locking.read_buf)
-#define write_buf_end(rchan) ((rchan)->scheme.locking.write_buf_end)
-#define read_buf_end(rchan) ((rchan)->scheme.locking.read_buf_end)
-#define cur_write_pos(rchan) ((rchan)->scheme.locking.current_write_pos)
-#define read_limit(rchan) ((rchan)->scheme.locking.read_limit)
-#define write_limit(rchan) ((rchan)->scheme.locking.write_limit)
-#define in_progress_event_pos(rchan) ((rchan)->scheme.locking.in_progress_event_pos)
-#define in_progress_event_size(rchan) ((rchan)->scheme.locking.in_progress_event_size)
-#define interrupted_pos(rchan) ((rchan)->scheme.locking.interrupted_pos)
-#define interrupting_size(rchan) ((rchan)->scheme.locking.interrupting_size)
-#define channel_lock(rchan) ((rchan)->scheme.locking.lock)
-
-
-/**
- * calc_time_delta - utility function for time delta calculation
- * @now: current time
- * @start: start time
- *
- * Returns the time delta produced by subtracting start time from now.
- */
-static inline u32
-calc_time_delta(struct timeval *now,
- struct timeval *start)
-{
- return (now->tv_sec - start->tv_sec) * 1000000
- + (now->tv_usec - start->tv_usec);
-}
-
-/**
- * recalc_time_delta - utility function for time delta recalculation
- * @now: current time
- * @new_delta: the new time delta calculated
- * @cpu: the associated CPU id
- */
-static inline void
-recalc_time_delta(struct timeval *now,
- u32 *new_delta,
- struct rchan *rchan)
-{
- if (using_tsc(rchan) == 0)
- *new_delta = calc_time_delta(now, &rchan->buf_start_time);
-}
-
-/**
- * have_cmpxchg - does this architecture have a cmpxchg?
- *
- * Returns 1 if this architecture has a cmpxchg useable by
- * the lockless scheme, 0 otherwise.
- */
-static inline int
-have_cmpxchg(void)
-{
-#if defined(__HAVE_ARCH_CMPXCHG)
- return 1;
-#else
- return 0;
-#endif
-}
-
-/**
- * relay_write_direct - write data directly into destination buffer
- */
-#define relay_write_direct(DEST, SRC, SIZE) \
-do\
-{\
- memcpy(DEST, SRC, SIZE);\
- DEST += SIZE;\
-} while (0);
-
-/**
- * relay_lock_channel - lock the relay channel if applicable
- *
- * This macro only affects the locking scheme. If the locking scheme
- * is in use and the channel usage is SMP, does a local_irq_save. If the
- * locking sheme is in use and the channel usage is GLOBAL, uses
- * spin_lock_irqsave. FLAGS is initialized to 0 since we know that
- * it is being initialized prior to use and we avoid the compiler warning.
- */
-#define relay_lock_channel(RCHAN, FLAGS) \
-do\
-{\
- FLAGS = 0;\
- if (using_locking(RCHAN)) {\
- if (usage_smp(RCHAN)) {\
- local_irq_save(FLAGS); \
- } else {\
- spin_lock_irqsave(&(RCHAN)->scheme.locking.lock, FLAGS); \
- }\
- }\
-} while (0);
-
-/**
- * relay_unlock_channel - unlock the relay channel if applicable
- *
- * This macro only affects the locking scheme. See relay_lock_channel.
- */
-#define relay_unlock_channel(RCHAN, FLAGS) \
-do\
-{\
- if (using_locking(RCHAN)) {\
- if (usage_smp(RCHAN)) {\
- local_irq_restore(FLAGS); \
- } else {\
- spin_unlock_irqrestore(&(RCHAN)->scheme.locking.lock, FLAGS); \
- }\
- }\
-} while (0);
-
-/*
- * Define cmpxchg if we don't have it
- */
-#ifndef __HAVE_ARCH_CMPXCHG
-#define cmpxchg(p,o,n) 0
-#endif
-
-/*
- * High-level relayfs kernel API, fs/relayfs/relay.c
- */
-extern int
-relay_open(const char *chanpath,
- int bufsize,
- int nbufs,
- u32 flags,
- struct rchan_callbacks *channel_callbacks,
- u32 start_reserve,
- u32 end_reserve,
- u32 rchan_start_reserve,
- u32 resize_min,
- u32 resize_max,
- int mode,
- char *init_buf,
- u32 init_buf_size);
-
-extern int
-relay_close(int rchan_id);
-
-extern int
-relay_write(int rchan_id,
- const void *data_ptr,
- size_t count,
- int td_offset,
- void **wrote_pos);
-
-extern ssize_t
-relay_read(struct rchan_reader *reader,
- char *buf,
- size_t count,
- int wait,
- u32 *actual_read_offset);
-
-extern int
-relay_discard_init_buf(int rchan_id);
-
-extern struct rchan_reader *
-add_rchan_reader(int rchan_id, int autoconsume);
-
-extern int
-remove_rchan_reader(struct rchan_reader *reader);
-
-extern struct rchan_reader *
-add_map_reader(int rchan_id);
-
-extern int
-remove_map_reader(struct rchan_reader *reader);
-
-extern int
-relay_info(int rchan_id, struct rchan_info *rchan_info);
-
-extern void
-relay_buffers_consumed(struct rchan_reader *reader, u32 buffers_consumed);
-
-extern void
-relay_bytes_consumed(struct rchan_reader *reader, u32 bytes_consumed, u32 read_offset);
-
-extern ssize_t
-relay_bytes_avail(struct rchan_reader *reader);
-
-extern int
-relay_realloc_buffer(int rchan_id, u32 new_nbufs, int in_background);
-
-extern int
-relay_replace_buffer(int rchan_id);
-
-extern int
-rchan_empty(struct rchan_reader *reader);
-
-extern int
-rchan_full(struct rchan_reader *reader);
-
-extern void
-update_readers_consumed(struct rchan *rchan, u32 bufs_consumed, u32 bytes_consumed);
-
-extern int
-__relay_mmap_buffer(struct rchan *rchan, struct vm_area_struct *vma);
-
-extern struct rchan_reader *
-__add_rchan_reader(struct rchan *rchan, struct file *filp, int auto_consume, int map_reader);
-
-extern void
-__remove_rchan_reader(struct rchan_reader *reader);
-
-/*
- * Low-level relayfs kernel API, fs/relayfs/relay.c
- */
-extern struct rchan *
-rchan_get(int rchan_id);
-
-extern void
-rchan_put(struct rchan *rchan);
-
-extern char *
-relay_reserve(struct rchan *rchan,
- u32 data_len,
- struct timeval *time_stamp,
- u32 *time_delta,
- int *errcode,
- int *interrupting);
-
-extern void
-relay_commit(struct rchan *rchan,
- char *from,
- u32 len,
- int reserve_code,
- int interrupting);
-
-extern u32
-relay_get_offset(struct rchan *rchan, u32 *max_offset);
-
-extern int
-relay_reset(int rchan_id);
-
-/*
- * VFS functions, fs/relayfs/inode.c
- */
-extern int
-relayfs_create_dir(const char *name,
- struct dentry *parent,
- struct dentry **dentry);
-
-extern int
-relayfs_create_file(const char * name,
- struct dentry *parent,
- struct dentry **dentry,
- void * data,
- int mode);
-
-extern int
-relayfs_remove_file(struct dentry *dentry);
-
-extern int
-reset_index(struct rchan *rchan, u32 old_index);
-
-
-/*
- * klog functions, fs/relayfs/klog.c
- */
-extern int
-create_klog_channel(void);
-
-extern int
-remove_klog_channel(void);
-
-/*
- * Scheme-specific channel ops
- */
-struct relay_ops
-{
- char * (*reserve) (struct rchan *rchan,
- u32 slot_len,
- struct timeval *time_stamp,
- u32 *tsc,
- int * errcode,
- int * interrupting);
-
- void (*commit) (struct rchan *rchan,
- char *from,
- u32 len,
- int deliver,
- int interrupting);
-
- u32 (*get_offset) (struct rchan *rchan,
- u32 *max_offset);
-
- void (*resume) (struct rchan *rchan);
- void (*finalize) (struct rchan *rchan);
- void (*reset) (struct rchan *rchan,
- int init);
- int (*reset_index) (struct rchan *rchan,
- u32 old_index);
-};
-
-#endif /* _LINUX_RELAYFS_FS_H */
-
-
-
-
-
+++ /dev/null
-#ifndef _LINUX_TASKDELAYS_H
-#define _LINUX_TASKDELAYS_H
-
-#include <linux/config.h>
-
-struct task_delay_info {
-#ifdef CONFIG_DELAY_ACCT
- /* delay statistics in usecs */
- unsigned long runs;
- unsigned long waitcpu_total;
- unsigned long runcpu_total;
- unsigned long iowait_total;
- unsigned long mem_iowait_total;
- unsigned long num_iowaits;
- unsigned long num_memwaits;
-#endif
-};
-
-#endif // _LINUX_TASKDELAYS_H
-
+++ /dev/null
-/*
- * include/video/gbe.h -- SGI GBE (Graphics Back End)
- *
- * Copyright (C) 1999 Silicon Graphics, Inc. (Jeffrey Newquist)
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- */
-
-#ifndef __GBE_H__
-#define __GBE_H__
-
-struct sgi_gbe {
- volatile uint32_t ctrlstat; /* general control */
- volatile uint32_t dotclock; /* dot clock PLL control */
- volatile uint32_t i2c; /* crt I2C control */
- volatile uint32_t sysclk; /* system clock PLL control */
- volatile uint32_t i2cfp; /* flat panel I2C control */
- volatile uint32_t id; /* device id/chip revision */
- volatile uint32_t config; /* power on configuration [1] */
- volatile uint32_t bist; /* internal bist status [1] */
- uint32_t _pad0[0x010000/4 - 8];
- volatile uint32_t vt_xy; /* current dot coords */
- volatile uint32_t vt_xymax; /* maximum dot coords */
- volatile uint32_t vt_vsync; /* vsync on/off */
- volatile uint32_t vt_hsync; /* hsync on/off */
- volatile uint32_t vt_vblank; /* vblank on/off */
- volatile uint32_t vt_hblank; /* hblank on/off */
- volatile uint32_t vt_flags; /* polarity of vt signals */
- volatile uint32_t vt_f2rf_lock; /* f2rf & framelck y coord */
- volatile uint32_t vt_intr01; /* intr 0,1 y coords */
- volatile uint32_t vt_intr23; /* intr 2,3 y coords */
- volatile uint32_t fp_hdrv; /* flat panel hdrv on/off */
- volatile uint32_t fp_vdrv; /* flat panel vdrv on/off */
- volatile uint32_t fp_de; /* flat panel de on/off */
- volatile uint32_t vt_hpixen; /* intrnl horiz pixel on/off */
- volatile uint32_t vt_vpixen; /* intrnl vert pixel on/off */
- volatile uint32_t vt_hcmap; /* cmap write (horiz) */
- volatile uint32_t vt_vcmap; /* cmap write (vert) */
- volatile uint32_t did_start_xy; /* eol/f did/xy reset val */
- volatile uint32_t crs_start_xy; /* eol/f crs/xy reset val */
- volatile uint32_t vc_start_xy; /* eol/f vc/xy reset val */
- uint32_t _pad1[0xffb0/4];
- volatile uint32_t ovr_width_tile;/*overlay plane ctrl 0 */
- volatile uint32_t ovr_inhwctrl; /* overlay plane ctrl 1 */
- volatile uint32_t ovr_control; /* overlay plane ctrl 1 */
- uint32_t _pad2[0xfff4/4];
- volatile uint32_t frm_size_tile;/* normal plane ctrl 0 */
- volatile uint32_t frm_size_pixel;/*normal plane ctrl 1 */
- volatile uint32_t frm_inhwctrl; /* normal plane ctrl 2 */
- volatile uint32_t frm_control; /* normal plane ctrl 3 */
- uint32_t _pad3[0xfff0/4];
- volatile uint32_t did_inhwctrl; /* DID control */
- volatile uint32_t did_control; /* DID shadow */
- uint32_t _pad4[0x7ff8/4];
- volatile uint32_t mode_regs[32];/* WID table */
- uint32_t _pad5[0x7f80/4];
- volatile uint32_t cmap[6144]; /* color map */
- uint32_t _pad6[0x2000/4];
- volatile uint32_t cm_fifo; /* color map fifo status */
- uint32_t _pad7[0x7ffc/4];
- volatile uint32_t gmap[256]; /* gamma map */
- uint32_t _pad8[0x7c00/4];
- volatile uint32_t gmap10[1024]; /* gamma map */
- uint32_t _pad9[0x7000/4];
- volatile uint32_t crs_pos; /* cusror control 0 */
- volatile uint32_t crs_ctl; /* cusror control 1 */
- volatile uint32_t crs_cmap[3]; /* crs cmap */
- uint32_t _pad10[0x7fec/4];
- volatile uint32_t crs_glyph[64];/* crs glyph */
- uint32_t _pad11[0x7f00/4];
- volatile uint32_t vc_0; /* video capture crtl 0 */
- volatile uint32_t vc_1; /* video capture crtl 1 */
- volatile uint32_t vc_2; /* video capture crtl 2 */
- volatile uint32_t vc_3; /* video capture crtl 3 */
- volatile uint32_t vc_4; /* video capture crtl 4 */
- volatile uint32_t vc_5; /* video capture crtl 5 */
- volatile uint32_t vc_6; /* video capture crtl 6 */
- volatile uint32_t vc_7; /* video capture crtl 7 */
- volatile uint32_t vc_8; /* video capture crtl 8 */
-};
-
-#define MASK(msb, lsb) \
- ( (((u32)1<<((msb)-(lsb)+1))-1) << (lsb) )
-#define GET(v, msb, lsb) \
- ( ((u32)(v) & MASK(msb,lsb)) >> (lsb) )
-#define SET(v, f, msb, lsb) \
- ( (v) = ((v)&~MASK(msb,lsb)) | (( (u32)(f)<<(lsb) ) & MASK(msb,lsb)) )
-
-#define GET_GBE_FIELD(reg, field, v) \
- GET((v), GBE_##reg##_##field##_MSB, GBE_##reg##_##field##_LSB)
-#define SET_GBE_FIELD(reg, field, v, f) \
- SET((v), (f), GBE_##reg##_##field##_MSB, GBE_##reg##_##field##_LSB)
-
-/*
- * Bit mask information
- */
-#define GBE_CTRLSTAT_CHIPID_MSB 3
-#define GBE_CTRLSTAT_CHIPID_LSB 0
-#define GBE_CTRLSTAT_SENSE_N_MSB 4
-#define GBE_CTRLSTAT_SENSE_N_LSB 4
-#define GBE_CTRLSTAT_PCLKSEL_MSB 29
-#define GBE_CTRLSTAT_PCLKSEL_LSB 28
-
-#define GBE_DOTCLK_M_MSB 7
-#define GBE_DOTCLK_M_LSB 0
-#define GBE_DOTCLK_N_MSB 13
-#define GBE_DOTCLK_N_LSB 8
-#define GBE_DOTCLK_P_MSB 15
-#define GBE_DOTCLK_P_LSB 14
-#define GBE_DOTCLK_RUN_MSB 20
-#define GBE_DOTCLK_RUN_LSB 20
-
-#define GBE_VT_XY_Y_MSB 23
-#define GBE_VT_XY_Y_LSB 12
-#define GBE_VT_XY_X_MSB 11
-#define GBE_VT_XY_X_LSB 0
-#define GBE_VT_XY_FREEZE_MSB 31
-#define GBE_VT_XY_FREEZE_LSB 31
-
-#define GBE_FP_VDRV_ON_MSB 23
-#define GBE_FP_VDRV_ON_LSB 12
-#define GBE_FP_VDRV_OFF_MSB 11
-#define GBE_FP_VDRV_OFF_LSB 0
-
-#define GBE_FP_HDRV_ON_MSB 23
-#define GBE_FP_HDRV_ON_LSB 12
-#define GBE_FP_HDRV_OFF_MSB 11
-#define GBE_FP_HDRV_OFF_LSB 0
-
-#define GBE_FP_DE_ON_MSB 23
-#define GBE_FP_DE_ON_LSB 12
-#define GBE_FP_DE_OFF_MSB 11
-#define GBE_FP_DE_OFF_LSB 0
-
-#define GBE_VT_VSYNC_VSYNC_ON_MSB 23
-#define GBE_VT_VSYNC_VSYNC_ON_LSB 12
-#define GBE_VT_VSYNC_VSYNC_OFF_MSB 11
-#define GBE_VT_VSYNC_VSYNC_OFF_LSB 0
-
-#define GBE_VT_HSYNC_HSYNC_ON_MSB 23
-#define GBE_VT_HSYNC_HSYNC_ON_LSB 12
-#define GBE_VT_HSYNC_HSYNC_OFF_MSB 11
-#define GBE_VT_HSYNC_HSYNC_OFF_LSB 0
-
-#define GBE_VT_VBLANK_VBLANK_ON_MSB 23
-#define GBE_VT_VBLANK_VBLANK_ON_LSB 12
-#define GBE_VT_VBLANK_VBLANK_OFF_MSB 11
-#define GBE_VT_VBLANK_VBLANK_OFF_LSB 0
-
-#define GBE_VT_HBLANK_HBLANK_ON_MSB 23
-#define GBE_VT_HBLANK_HBLANK_ON_LSB 12
-#define GBE_VT_HBLANK_HBLANK_OFF_MSB 11
-#define GBE_VT_HBLANK_HBLANK_OFF_LSB 0
-
-#define GBE_VT_FLAGS_F2RF_HIGH_MSB 6
-#define GBE_VT_FLAGS_F2RF_HIGH_LSB 6
-#define GBE_VT_FLAGS_SYNC_LOW_MSB 5
-#define GBE_VT_FLAGS_SYNC_LOW_LSB 5
-#define GBE_VT_FLAGS_SYNC_HIGH_MSB 4
-#define GBE_VT_FLAGS_SYNC_HIGH_LSB 4
-#define GBE_VT_FLAGS_HDRV_LOW_MSB 3
-#define GBE_VT_FLAGS_HDRV_LOW_LSB 3
-#define GBE_VT_FLAGS_HDRV_INVERT_MSB 2
-#define GBE_VT_FLAGS_HDRV_INVERT_LSB 2
-#define GBE_VT_FLAGS_VDRV_LOW_MSB 1
-#define GBE_VT_FLAGS_VDRV_LOW_LSB 1
-#define GBE_VT_FLAGS_VDRV_INVERT_MSB 0
-#define GBE_VT_FLAGS_VDRV_INVERT_LSB 0
-
-#define GBE_VT_VCMAP_VCMAP_ON_MSB 23
-#define GBE_VT_VCMAP_VCMAP_ON_LSB 12
-#define GBE_VT_VCMAP_VCMAP_OFF_MSB 11
-#define GBE_VT_VCMAP_VCMAP_OFF_LSB 0
-
-#define GBE_VT_HCMAP_HCMAP_ON_MSB 23
-#define GBE_VT_HCMAP_HCMAP_ON_LSB 12
-#define GBE_VT_HCMAP_HCMAP_OFF_MSB 11
-#define GBE_VT_HCMAP_HCMAP_OFF_LSB 0
-
-#define GBE_VT_XYMAX_MAXX_MSB 11
-#define GBE_VT_XYMAX_MAXX_LSB 0
-#define GBE_VT_XYMAX_MAXY_MSB 23
-#define GBE_VT_XYMAX_MAXY_LSB 12
-
-#define GBE_VT_HPIXEN_HPIXEN_ON_MSB 23
-#define GBE_VT_HPIXEN_HPIXEN_ON_LSB 12
-#define GBE_VT_HPIXEN_HPIXEN_OFF_MSB 11
-#define GBE_VT_HPIXEN_HPIXEN_OFF_LSB 0
-
-#define GBE_VT_VPIXEN_VPIXEN_ON_MSB 23
-#define GBE_VT_VPIXEN_VPIXEN_ON_LSB 12
-#define GBE_VT_VPIXEN_VPIXEN_OFF_MSB 11
-#define GBE_VT_VPIXEN_VPIXEN_OFF_LSB 0
-
-#define GBE_OVR_CONTROL_OVR_DMA_ENABLE_MSB 0
-#define GBE_OVR_CONTROL_OVR_DMA_ENABLE_LSB 0
-
-#define GBE_OVR_INHWCTRL_OVR_DMA_ENABLE_MSB 0
-#define GBE_OVR_INHWCTRL_OVR_DMA_ENABLE_LSB 0
-
-#define GBE_OVR_WIDTH_TILE_OVR_FIFO_RESET_MSB 13
-#define GBE_OVR_WIDTH_TILE_OVR_FIFO_RESET_LSB 13
-
-#define GBE_FRM_CONTROL_FRM_DMA_ENABLE_MSB 0
-#define GBE_FRM_CONTROL_FRM_DMA_ENABLE_LSB 0
-#define GBE_FRM_CONTROL_FRM_TILE_PTR_MSB 31
-#define GBE_FRM_CONTROL_FRM_TILE_PTR_LSB 9
-#define GBE_FRM_CONTROL_FRM_LINEAR_MSB 1
-#define GBE_FRM_CONTROL_FRM_LINEAR_LSB 1
-
-#define GBE_FRM_INHWCTRL_FRM_DMA_ENABLE_MSB 0
-#define GBE_FRM_INHWCTRL_FRM_DMA_ENABLE_LSB 0
-
-#define GBE_FRM_SIZE_TILE_FRM_WIDTH_TILE_MSB 12
-#define GBE_FRM_SIZE_TILE_FRM_WIDTH_TILE_LSB 5
-#define GBE_FRM_SIZE_TILE_FRM_RHS_MSB 4
-#define GBE_FRM_SIZE_TILE_FRM_RHS_LSB 0
-#define GBE_FRM_SIZE_TILE_FRM_DEPTH_MSB 14
-#define GBE_FRM_SIZE_TILE_FRM_DEPTH_LSB 13
-#define GBE_FRM_SIZE_TILE_FRM_FIFO_RESET_MSB 15
-#define GBE_FRM_SIZE_TILE_FRM_FIFO_RESET_LSB 15
-
-#define GBE_FRM_SIZE_PIXEL_FB_HEIGHT_PIX_MSB 31
-#define GBE_FRM_SIZE_PIXEL_FB_HEIGHT_PIX_LSB 16
-
-#define GBE_DID_CONTROL_DID_DMA_ENABLE_MSB 0
-#define GBE_DID_CONTROL_DID_DMA_ENABLE_LSB 0
-#define GBE_DID_INHWCTRL_DID_DMA_ENABLE_MSB 0
-#define GBE_DID_INHWCTRL_DID_DMA_ENABLE_LSB 0
-
-#define GBE_DID_START_XY_DID_STARTY_MSB 23
-#define GBE_DID_START_XY_DID_STARTY_LSB 12
-#define GBE_DID_START_XY_DID_STARTX_MSB 11
-#define GBE_DID_START_XY_DID_STARTX_LSB 0
-
-#define GBE_CRS_START_XY_CRS_STARTY_MSB 23
-#define GBE_CRS_START_XY_CRS_STARTY_LSB 12
-#define GBE_CRS_START_XY_CRS_STARTX_MSB 11
-#define GBE_CRS_START_XY_CRS_STARTX_LSB 0
-
-#define GBE_WID_AUX_MSB 12
-#define GBE_WID_AUX_LSB 11
-#define GBE_WID_GAMMA_MSB 10
-#define GBE_WID_GAMMA_LSB 10
-#define GBE_WID_CM_MSB 9
-#define GBE_WID_CM_LSB 5
-#define GBE_WID_TYP_MSB 4
-#define GBE_WID_TYP_LSB 2
-#define GBE_WID_BUF_MSB 1
-#define GBE_WID_BUF_LSB 0
-
-#define GBE_VC_START_XY_VC_STARTY_MSB 23
-#define GBE_VC_START_XY_VC_STARTY_LSB 12
-#define GBE_VC_START_XY_VC_STARTX_MSB 11
-#define GBE_VC_START_XY_VC_STARTX_LSB 0
-
-/* Constants */
-
-#define GBE_FRM_DEPTH_8 0
-#define GBE_FRM_DEPTH_16 1
-#define GBE_FRM_DEPTH_32 2
-
-#define GBE_CMODE_I8 0
-#define GBE_CMODE_I12 1
-#define GBE_CMODE_RG3B2 2
-#define GBE_CMODE_RGB4 3
-#define GBE_CMODE_ARGB5 4
-#define GBE_CMODE_RGB8 5
-#define GBE_CMODE_RGBA5 6
-#define GBE_CMODE_RGB10 7
-
-#define GBE_BMODE_BOTH 3
-
-#define GBE_CRS_MAGIC 54
-#define GBE_PIXEN_MAGIC_ON 19
-#define GBE_PIXEN_MAGIC_OFF 2
-
-#define GBE_TLB_SIZE 128
-
-/* [1] - only GBE revision 2 and later */
-
-/*
- * Video Timing Data Structure
- */
-
-struct gbe_timing_info {
- int flags;
- short width; /* Monitor resolution */
- short height;
- int fields_sec; /* fields/sec (Hz -3 dec. places */
- int cfreq; /* pixel clock frequency (MHz -3 dec. places) */
- short htotal; /* Horizontal total pixels */
- short hblank_start; /* Horizontal blank start */
- short hblank_end; /* Horizontal blank end */
- short hsync_start; /* Horizontal sync start */
- short hsync_end; /* Horizontal sync end */
- short vtotal; /* Vertical total lines */
- short vblank_start; /* Vertical blank start */
- short vblank_end; /* Vertical blank end */
- short vsync_start; /* Vertical sync start */
- short vsync_end; /* Vertical sync end */
- short pll_m; /* PLL M parameter */
- short pll_n; /* PLL P parameter */
- short pll_p; /* PLL N parameter */
-};
-
-/* Defines for gbe_vof_info_t flags */
-
-#define GBE_VOF_UNKNOWNMON 1
-#define GBE_VOF_STEREO 2
-#define GBE_VOF_DO_GENSYNC 4 /* enable incoming sync */
-#define GBE_VOF_SYNC_ON_GREEN 8 /* sync on green */
-#define GBE_VOF_FLATPANEL 0x1000 /* FLATPANEL Timing */
-#define GBE_VOF_MAGICKEY 0x2000 /* Backdoor key */
-
-#endif /* ! __GBE_H__ */
+++ /dev/null
-#
-# Makefile for CKRM
-#
-
-ifeq ($(CONFIG_CKRM),y)
- obj-y = ckrm.o ckrmutils.o
-endif
-
-obj-$(CONFIG_CKRM_TYPE_TASKCLASS) += ckrm_tc.o
-obj-$(CONFIG_CKRM_RES_NUMTASKS) += ckrm_tasks.o
-
-obj-$(CONFIG_CKRM_TYPE_SOCKETCLASS) += ckrm_sockc.o
-obj-$(CONFIG_CKRM_RES_LISTENAQ) += ckrm_listenaq.o
-
+++ /dev/null
-/* ckrm.c - Class-based Kernel Resource Management (CKRM)
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003, 2004
- * (C) Shailabh Nagar, IBM Corp. 2003, 2004
- * (C) Chandra Seetharaman, IBM Corp. 2003
- * (C) Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Provides kernel API of CKRM for in-kernel,per-resource controllers
- * (one each for cpu, memory, io, network) and callbacks for
- * classification modules.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 28 Aug 2003
- * Created.
- * 06 Nov 2003
- * Made modifications to suit the new RBCE module.
- * 10 Nov 2003
- * Fixed a bug in fork and exit callbacks. Added callbacks_active and
- * surrounding logic. Added task paramter for all CE callbacks.
- * 23 Mar 2004
- * moved to referenced counted class objects and correct locking
- * 19 Apr 2004
- * Integrated ckrm hooks, classtypes, ...
- *
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <asm/uaccess.h>
-#include <linux/mm.h>
-#include <asm/errno.h>
-#include <linux/string.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/ckrm_rc.h>
-#include <linux/rcfs.h>
-#include <net/sock.h>
-#include <linux/ip.h>
-
-
-rwlock_t ckrm_class_lock = RW_LOCK_UNLOCKED; // protect classlists
-
-struct rcfs_functions rcfs_fn ;
-EXPORT_SYMBOL(rcfs_fn);
-
-
-/**************************************************************************
- * Helper Functions *
- **************************************************************************/
-
-/*
- * Return TRUE if the given core class pointer is valid.
- */
-
-/*
- * Return TRUE if the given resource is registered.
- */
-inline unsigned int
-is_res_regd(struct ckrm_classtype *clstype, int resid)
-{
- return ( (resid>=0) && (resid < clstype->max_resid) &&
- test_bit(resid, &clstype->bit_res_ctlrs)
- );
-}
-
-struct ckrm_res_ctlr*
-ckrm_resctlr_lookup(struct ckrm_classtype *clstype, const char *resname)
-{
- int resid = -1;
-
- for (resid=0; resid < clstype->max_resid; resid++) {
- if (test_bit(resid, &clstype->bit_res_ctlrs)) {
- struct ckrm_res_ctlr *rctrl = clstype->res_ctlrs[resid];
- if (!strncmp(resname, rctrl->res_name,CKRM_MAX_RES_NAME))
- return rctrl;
- }
- }
- return NULL;
-}
-EXPORT_SYMBOL(ckrm_resctlr_lookup);
-
-/* given a classname return the class handle and its classtype*/
-void *
-ckrm_classobj(char *classname, int *classTypeID)
-{
- int i;
-
- *classTypeID = -1;
- if (!classname || !*classname) {
- return NULL;
- }
-
- read_lock(&ckrm_class_lock);
- for ( i=0 ; i<CKRM_MAX_CLASSTYPES; i++) {
- struct ckrm_classtype *ctype = ckrm_classtypes[i];
- struct ckrm_core_class *core;
-
- if (ctype == NULL)
- continue;
- list_for_each_entry(core, &ctype->classes, clslist) {
- if (core->name && !strcmp(core->name, classname)) {
- // FIXME: should grep reference..
- read_unlock(&ckrm_class_lock);
- *classTypeID = ctype->typeID;
- return core;
- }
- }
- }
- read_unlock(&ckrm_class_lock);
- return NULL;
-}
-
-EXPORT_SYMBOL(is_res_regd);
-EXPORT_SYMBOL(ckrm_classobj);
-
-/**************************************************************************
- * Internal Functions/macros *
- **************************************************************************/
-
-static inline void
-set_callbacks_active(struct ckrm_classtype *ctype)
-{
- ctype->ce_cb_active = ((atomic_read(&ctype->ce_nr_users) > 0) &&
- (ctype->ce_callbacks.always_callback || (ctype->num_classes > 1)));
-}
-
-int
-ckrm_validate_and_grab_core(struct ckrm_core_class *core)
-{
- int rc = 0;
- read_lock(&ckrm_class_lock);
- if (likely(ckrm_is_core_valid(core))) {
- ckrm_core_grab(core);
- rc = 1;
- }
- read_unlock(&ckrm_class_lock);
- return rc;
-}
-
-/****************************************************************************
- * Interfaces for classification engine *
- ****************************************************************************/
-
-/*
- * Registering a callback structure by the classification engine.
- *
- * Returns typeId of class on success -errno for failure.
- */
-int
-ckrm_register_engine(const char *typename, ckrm_eng_callback_t *ecbs)
-{
- struct ckrm_classtype *ctype;
-
- ctype = ckrm_find_classtype_by_name(typename);
- if (ctype == NULL)
- return (-ENOENT);
-
- ce_protect(ctype);
- if (atomic_read(&ctype->ce_nr_users) != 1) {
- // Some engine is acive, deregister it first.
- ce_release(ctype);
- return (-EBUSY);
- }
-
- /* we require that either classify and class_delete are set (due to object reference)
- * or that notify is set (in case no real classification is supported only notification
- * also require that the function pointer be set the momement the mask is non-null
- */
- if ( ! (((ecbs->classify) && (ecbs->class_delete)) || (ecbs->notify)) ||
- (ecbs->c_interest && ecbs->classify == NULL) ||
- (ecbs->n_interest && ecbs->notify == NULL) )
- {
- ce_release(ctype);
- return (-EINVAL);
- }
-
-
- /* Is any other engine registered for this classtype ? */
- if (ctype->ce_regd) {
- ce_release(ctype);
- return (-EINVAL);
- }
-
- ctype->ce_regd = 1;
- ctype->ce_callbacks = *ecbs;
- set_callbacks_active(ctype);
- if (ctype->ce_callbacks.class_add)
- (*ctype->ce_callbacks.class_add)(ctype->default_class->name,ctype->default_class);
- return ctype->typeID;
-}
-
-/*
- * Unregistering a callback structure by the classification engine.
- *
- * Returns 0 on success -errno for failure.
- */
-int
-ckrm_unregister_engine(const char *typename)
-{
- struct ckrm_classtype *ctype;
-
- ctype = ckrm_find_classtype_by_name(typename);
- if (ctype == NULL)
- return (-ENOENT);
-
- ctype->ce_cb_active = 0;
-
- if (atomic_dec_and_test(&ctype->ce_nr_users) != 1) {
- // Somebody is currently using the engine, cannot deregister.
- atomic_inc(&ctype->ce_nr_users);
- return (-EBUSY);
- }
-
- ctype->ce_regd = 0;
- memset(&ctype->ce_callbacks, 0, sizeof(ckrm_eng_callback_t));
- return 0;
-}
-
-/****************************************************************************
- * Interfaces to manipulate class (core or resource) hierarchies
- ****************************************************************************/
-
-/*
- */
-static void
-ckrm_add_child(struct ckrm_core_class *parent, struct ckrm_core_class *child)
-{
- struct ckrm_hnode *cnode = &child->hnode;
-
- if (!ckrm_is_core_valid(child)) {
- printk(KERN_ERR "Invalid child %p given in ckrm_add_child\n", child);
- return;
- }
-
- class_lock(child);
- INIT_LIST_HEAD(&cnode->children);
- INIT_LIST_HEAD(&cnode->siblings);
-
- if (parent) {
- struct ckrm_hnode *pnode;
-
- if (!ckrm_is_core_valid(parent)) {
- printk(KERN_ERR "Invalid parent %p given in ckrm_add_child\n",
- parent);
- parent = NULL;
- } else {
- pnode = &parent->hnode;
- write_lock(&parent->hnode_rwlock);
- list_add(&cnode->siblings, &pnode->children);
- write_unlock(&parent->hnode_rwlock);
- }
- }
- cnode->parent = parent;
- class_unlock(child);
- return;
-}
-
-/*
- */
-static int
-ckrm_remove_child(struct ckrm_core_class *child)
-{
- struct ckrm_hnode *cnode, *pnode;
- struct ckrm_core_class *parent;
-
- if (!ckrm_is_core_valid(child)) {
- printk(KERN_ERR "Invalid child %p given in ckrm_remove_child\n", child);
- return 0;
- }
-
- cnode = &child->hnode;
- parent = cnode->parent;
- if (!ckrm_is_core_valid(parent)) {
- printk(KERN_ERR "Invalid parent %p in ckrm_remove_child\n", parent);
- return 0;
- }
-
- pnode = &parent->hnode;
-
- class_lock(child);
- /* ensure that the node does not have children */
- if (!list_empty(&cnode->children)) {
- class_unlock(child);
- return 0;
- }
- write_lock(&parent->hnode_rwlock);
- list_del(&cnode->siblings);
- write_unlock(&parent->hnode_rwlock);
- cnode->parent = NULL;
- class_unlock(child);
- return 1;
-}
-
-void
-ckrm_lock_hier(struct ckrm_core_class *parent)
-{
- if (ckrm_is_core_valid(parent)) {
- read_lock(&parent->hnode_rwlock);
- }
-}
-
-void
-ckrm_unlock_hier(struct ckrm_core_class *parent)
-{
- if (ckrm_is_core_valid(parent)) {
- read_unlock(&parent->hnode_rwlock);
- }
-}
-
-/*
- * hnode_rwlock of the parent core class must held in read mode.
- * external callers should 've called ckrm_lock_hier before calling this
- * function.
- */
-#define hnode_2_core(ptr) ((ptr) ? container_of(ptr, struct ckrm_core_class, hnode) : NULL)
-
-struct ckrm_core_class *
-ckrm_get_next_child(struct ckrm_core_class *parent,
- struct ckrm_core_class *child)
-{
- struct list_head *cnode;
- struct ckrm_hnode *next_cnode;
- struct ckrm_core_class *next_childcore;
-
- if (!ckrm_is_core_valid(parent)) {
- printk(KERN_ERR "Invalid parent %p in ckrm_get_next_child\n", parent);
- return NULL;
- }
- if (list_empty(&parent->hnode.children)) {
- return NULL;
- }
-
- if (child) {
- if (!ckrm_is_core_valid(child)) {
- printk(KERN_ERR "Invalid child %p in ckrm_get_next_child\n", child);
- return NULL;
- }
- cnode = child->hnode.siblings.next;
- } else {
- cnode = parent->hnode.children.next;
- }
-
- if (cnode == &parent->hnode.children) { // back at the anchor
- return NULL;
- }
-
- next_cnode = container_of(cnode, struct ckrm_hnode, siblings);
- next_childcore = hnode_2_core(next_cnode);
-
- if (!ckrm_is_core_valid(next_childcore)) {
- printk(KERN_ERR "Invalid next child %p in ckrm_get_next_child\n",
- next_childcore);
- return NULL;
- }
- return next_childcore;
-}
-
-EXPORT_SYMBOL(ckrm_lock_hier);
-EXPORT_SYMBOL(ckrm_unlock_hier);
-EXPORT_SYMBOL(ckrm_get_next_child);
-
-static void
-ckrm_alloc_res_class(struct ckrm_core_class *core,
- struct ckrm_core_class *parent,
- int resid)
-{
-
- struct ckrm_classtype *clstype;
-
- /*
- * Allocate a resource class only if the resource controller has
- * registered with core and the engine requests for the class.
- */
-
- if (!ckrm_is_core_valid(core))
- return ;
-
- clstype = core->classtype;
- core->res_class[resid] = NULL;
-
- if (test_bit(resid, &clstype->bit_res_ctlrs)) {
- ckrm_res_ctlr_t *rcbs;
-
- atomic_inc(&clstype->nr_resusers[resid]);
- rcbs = clstype->res_ctlrs[resid];
-
- if (rcbs && rcbs->res_alloc) {
- core->res_class[resid] =(*rcbs->res_alloc)(core,parent);
- if (core->res_class[resid])
- return;
- printk(KERN_ERR "Error creating res class\n");
- }
- atomic_dec(&clstype->nr_resusers[resid]);
- }
-}
-
-/*
- * Initialize a core class
- *
- */
-
-#define CLS_DEBUG(fmt, args...) do { /* printk("%s: " fmt, __FUNCTION__ , ## args); */ } while (0)
-
-
-int
-ckrm_init_core_class(struct ckrm_classtype *clstype,
- struct ckrm_core_class *dcore,
- struct ckrm_core_class *parent,
- const char *name)
-{
- // Hubertus ... should replace name with dentry or add dentry ?
- int i;
-
- // Hubertus .. how is this used in initialization
-
- CLS_DEBUG("name %s => %p\n", name?name:"default",dcore);
-
- if ((dcore != clstype->default_class) && ( !ckrm_is_core_valid(parent))) {
- printk("error not a valid parent %p\n", parent);
- return -EINVAL;
- }
-#if 0 // Hubertus .. dynamic allocation still breaks when RCs registers. See def in ckrm_rc.h
- dcore->res_class = NULL;
- if (clstype->max_resid > 0) {
- dcore->res_class = (void**)kmalloc(clstype->max_resid * sizeof(void*) , GFP_KERNEL);
- if (dcore->res_class == NULL) {
- printk("error no mem\n");
- return -ENOMEM;
- }
- }
-#endif
-
- dcore->classtype = clstype;
- dcore->magic = CKRM_CORE_MAGIC;
- dcore->name = name;
- dcore->class_lock = SPIN_LOCK_UNLOCKED;
- dcore->hnode_rwlock = RW_LOCK_UNLOCKED;
- dcore->delayed = 0;
-
- atomic_set(&dcore->refcnt, 0);
- write_lock(&ckrm_class_lock);
-
- INIT_LIST_HEAD(&dcore->objlist);
- list_add(&dcore->clslist,&clstype->classes);
-
- clstype->num_classes++;
- set_callbacks_active(clstype);
-
- write_unlock(&ckrm_class_lock);
- ckrm_add_child(parent, dcore);
-
- for (i = 0; i < clstype->max_resid; i++)
- ckrm_alloc_res_class(dcore,parent,i);
-
- // fix for race condition seen in stress with numtasks
- if (parent)
- ckrm_core_grab(parent);
-
- ckrm_core_grab( dcore );
- return 0;
-}
-
-
-static void
-ckrm_free_res_class(struct ckrm_core_class *core, int resid)
-{
- /*
- * Free a resource class only if the resource controller has
- * registered with core
- */
-
- if (core->res_class[resid]) {
- ckrm_res_ctlr_t *rcbs;
- struct ckrm_classtype *clstype = core->classtype;
-
- atomic_inc(&clstype->nr_resusers[resid]);
- rcbs = clstype->res_ctlrs[resid];
-
- if (rcbs->res_free) {
- (*rcbs->res_free)(core->res_class[resid]);
- atomic_dec(&clstype->nr_resusers[resid]); // for inc in alloc
- core->res_class[resid] = NULL;
- }
- atomic_dec(&clstype->nr_resusers[resid]);
- }
-}
-
-
-/*
- * Free a core class
- * requires that all tasks were previously reassigned to another class
- *
- * Returns 0 on success -errno on failure.
- */
-
-void
-ckrm_free_core_class(struct ckrm_core_class *core)
-{
- int i;
- struct ckrm_classtype *clstype = core->classtype;
- struct ckrm_core_class *parent = core->hnode.parent;
-
- CLS_DEBUG("core=%p:%s parent=%p:%s\n",core,core->name,parent,parent->name);
- if (core->delayed) {
- /* this core was marked as late */
- printk("class <%s> finally deleted %lu\n",core->name,jiffies);
- }
- if (ckrm_remove_child(core) == 0) {
- printk("Core class removal failed. Chilren present\n");
- }
-
- for (i = 0; i < clstype->max_resid; i++) {
- ckrm_free_res_class(core,i);
- }
-
- write_lock(&ckrm_class_lock);
-
- // Clear the magic, so we would know if this core is reused.
- core->magic = 0;
-#if 0 // Dynamic not yet enabled
- core->res_class = NULL;
-#endif
- // Remove this core class from its linked list.
- list_del(&core->clslist);
- clstype->num_classes--;
- set_callbacks_active(clstype);
- write_unlock(&ckrm_class_lock);
-
- // fix for race condition seen in stress with numtasks
- if (parent)
- ckrm_core_drop(parent);
-
- kfree(core);
-}
-
-int
-ckrm_release_core_class(struct ckrm_core_class *core)
-{
- if (!ckrm_is_core_valid(core)) {
- // Invalid core
- return (-EINVAL);
- }
-
- if (core == core->classtype->default_class)
- return 0;
-
- /* need to make sure that the classgot really dropped */
- if (atomic_read(&core->refcnt) != 1) {
- CLS_DEBUG("class <%s> deletion delayed refcnt=%d jif=%ld\n",
- core->name,atomic_read(&core->refcnt),jiffies);
- core->delayed = 1; /* just so we have a ref point */
- }
- ckrm_core_drop(core);
- return 0;
-}
-
-/****************************************************************************
- * Interfaces for the resource controller *
- ****************************************************************************/
-/*
- * Registering a callback structure by the resource controller.
- *
- * Returns the resource id(0 or +ve) on success, -errno for failure.
- */
-static int
-ckrm_register_res_ctlr_intern(struct ckrm_classtype *clstype, ckrm_res_ctlr_t *rcbs)
-{
- int resid, ret,i;
-
- if (!rcbs)
- return -EINVAL;
-
- resid = rcbs->resid;
-
- spin_lock(&clstype->res_ctlrs_lock);
-
- printk(KERN_WARNING "resid is %d name is %s %s\n",
- resid, rcbs->res_name,clstype->res_ctlrs[resid]->res_name);
-
- if (resid >= 0) {
- if ((resid < CKRM_MAX_RES_CTLRS) && (clstype->res_ctlrs[resid] == NULL)) {
- clstype->res_ctlrs[resid] = rcbs;
- atomic_set(&clstype->nr_resusers[resid], 0);
- set_bit(resid, &clstype->bit_res_ctlrs);
- ret = resid;
- if (resid >= clstype->max_resid) {
- clstype->max_resid = resid + 1;
- }
- } else {
- ret = -EBUSY;
- }
- spin_unlock(&clstype->res_ctlrs_lock);
- return ret;
- }
-
- for (i = clstype->resid_reserved; i < clstype->max_res_ctlrs; i++) {
- if (clstype->res_ctlrs[i] == NULL) {
- clstype->res_ctlrs[i] = rcbs;
- rcbs->resid = i;
- atomic_set(&clstype->nr_resusers[i], 0);
- set_bit(i, &clstype->bit_res_ctlrs);
- if (i >= clstype->max_resid) {
- clstype->max_resid = i + 1;
- }
- spin_unlock(&clstype->res_ctlrs_lock);
- return i;
- }
- }
-
- spin_unlock(&clstype->res_ctlrs_lock);
- return (-ENOMEM);
-}
-
-int
-ckrm_register_res_ctlr(struct ckrm_classtype *clstype, ckrm_res_ctlr_t *rcbs)
-{
- struct ckrm_core_class *core;
- int resid;
-
- resid = ckrm_register_res_ctlr_intern(clstype,rcbs);
-
- if (resid >= 0) {
- /* run through all classes and create the resource class object and
- * if necessary "initialize" class in context of this resource
- */
- read_lock(&ckrm_class_lock);
- list_for_each_entry(core, &clstype->classes, clslist) {
- printk("CKRM .. create res clsobj for resouce <%s> class <%s> par=%p\n",
- rcbs->res_name, core->name, core->hnode.parent);
- ckrm_alloc_res_class(core, core->hnode.parent, resid);
- if (clstype->add_resctrl) // FIXME: this should be mandatory
- (*clstype->add_resctrl)(core,resid);
- }
- read_unlock(&ckrm_class_lock);
- }
- return resid;
-}
-
-/*
- * Unregistering a callback structure by the resource controller.
- *
- * Returns 0 on success -errno for failure.
- */
-int
-ckrm_unregister_res_ctlr(struct ckrm_res_ctlr *rcbs)
-{
- struct ckrm_classtype *clstype = rcbs->classtype;
- int resid = rcbs->resid;
-
- if ((clstype == NULL) || (resid < 0))
- return -EINVAL;
-
- if (atomic_read(&clstype->nr_resusers[resid]))
- return -EBUSY;
-
- // FIXME: probably need to also call deregistration function
-
- spin_lock(&clstype->res_ctlrs_lock);
- clstype->res_ctlrs[resid] = NULL;
- clear_bit(resid, &clstype->bit_res_ctlrs);
- clstype->max_resid = fls(clstype->bit_res_ctlrs);
- rcbs->resid = -1;
- spin_unlock(&clstype->res_ctlrs_lock);
-
- return 0;
-}
-
-/*******************************************************************
- * Class Type Registration
- *******************************************************************/
-
-/* Hubertus ... we got to do some locking here */
-
-struct ckrm_classtype* ckrm_classtypes[CKRM_MAX_CLASSTYPES];
-EXPORT_SYMBOL(ckrm_classtypes); // really should build a better interface for this
-
-int
-ckrm_register_classtype(struct ckrm_classtype *clstype)
-{
- int tid = clstype->typeID;
-
- if (tid != -1) {
- if ((tid < 0) || (tid > CKRM_MAX_CLASSTYPES) || (ckrm_classtypes[tid]))
- return -EINVAL;
- } else {
- int i;
- for ( i=CKRM_RESV_CLASSTYPES ; i<CKRM_MAX_CLASSTYPES; i++) {
- if (ckrm_classtypes[i] == NULL) {
- tid = i;
- break;
- }
- }
- }
- if (tid == -1)
- return -EBUSY;
- clstype->typeID = tid;
- ckrm_classtypes[tid] = clstype;
-
- /* Hubertus .. we need to call the callbacks of the RCFS client */
- if (rcfs_fn.register_classtype) {
- (* rcfs_fn.register_classtype)(clstype);
- // No error return for now ;
- }
-
- return tid;
-}
-
-int
-ckrm_unregister_classtype(struct ckrm_classtype *clstype)
-{
- int tid = clstype->typeID;
-
- if ((tid < 0) || (tid > CKRM_MAX_CLASSTYPES) || (ckrm_classtypes[tid] != clstype))
- return -EINVAL;
-
- if (rcfs_fn.deregister_classtype) {
- (* rcfs_fn.deregister_classtype)(clstype);
- // No error return for now
- }
-
- ckrm_classtypes[tid] = NULL;
- clstype->typeID = -1;
- return 0;
-}
-
-struct ckrm_classtype*
-ckrm_find_classtype_by_name(const char *name)
-{
- int i;
- for ( i=0 ; i<CKRM_MAX_CLASSTYPES; i++) {
- struct ckrm_classtype *ctype = ckrm_classtypes[i];
- if (ctype && !strncmp(ctype->name,name,CKRM_MAX_TYPENAME_LEN))
- return ctype;
- }
- return NULL;
-}
-
-
-/*******************************************************************
- * Event callback invocation
- *******************************************************************/
-
-struct ckrm_hook_cb* ckrm_event_callbacks[CKRM_NONLATCHABLE_EVENTS];
-
-/* Registration / Deregistration / Invocation functions */
-
-int
-ckrm_register_event_cb(enum ckrm_event ev, struct ckrm_hook_cb *cb)
-{
- struct ckrm_hook_cb **cbptr;
-
- if ((ev < CKRM_LATCHABLE_EVENTS) || (ev >= CKRM_NONLATCHABLE_EVENTS))
- return 1;
- cbptr = &ckrm_event_callbacks[ev];
- while (*cbptr != NULL)
- cbptr = &((*cbptr)->next);
- *cbptr = cb;
- return 0;
-}
-
-int
-ckrm_unregister_event_cb(enum ckrm_event ev, struct ckrm_hook_cb *cb)
-{
- struct ckrm_hook_cb **cbptr;
-
- if ((ev < CKRM_LATCHABLE_EVENTS) || (ev >= CKRM_NONLATCHABLE_EVENTS))
- return -1;
- cbptr = &ckrm_event_callbacks[ev];
- while ((*cbptr != NULL) && (*cbptr != cb))
- cbptr = &((*cbptr)->next);
- if (*cbptr)
- (*cbptr)->next = cb->next;
- return (*cbptr == NULL);
-}
-
-int
-ckrm_register_event_set(struct ckrm_event_spec especs[])
-{
- struct ckrm_event_spec *espec = especs;
-
- for ( espec = especs ; espec->ev != -1 ; espec++ )
- ckrm_register_event_cb(espec->ev,&espec->cb);
- return 0;
-}
-
-int
-ckrm_unregister_event_set(struct ckrm_event_spec especs[])
-{
- struct ckrm_event_spec *espec = especs;
-
- for ( espec = especs ; espec->ev != -1 ; espec++ )
- ckrm_unregister_event_cb(espec->ev,&espec->cb);
- return 0;
-}
-
-#define ECC_PRINTK(fmt, args...) // printk("%s: " fmt, __FUNCTION__ , ## args)
-
-void
-ckrm_invoke_event_cb_chain(enum ckrm_event ev, void *arg)
-{
- struct ckrm_hook_cb *cb, *anchor;
-
- ECC_PRINTK("%d %x\n",current,ev,arg);
- if ((anchor = ckrm_event_callbacks[ev]) != NULL) {
- for ( cb = anchor ; cb ; cb = cb->next )
- (*cb->fct)(arg);
- }
-}
-
-/*******************************************************************
- * Generic Functions that can be used as default functions
- * in almost all classtypes
- * (a) function iterator over all resource classes of a class
- * (b) function invoker on a named resource
- *******************************************************************/
-
-int
-ckrm_class_show_shares(struct ckrm_core_class *core, struct seq_file *seq)
-{
- int i;
- struct ckrm_res_ctlr *rcbs;
- struct ckrm_classtype *clstype = core->classtype;
- struct ckrm_shares shares;
-
- for (i = 0; i < clstype->max_resid; i++) {
- atomic_inc(&clstype->nr_resusers[i]);
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->get_share_values) {
- (*rcbs->get_share_values)(core->res_class[i], &shares);
- seq_printf(seq,"res=%s,guarantee=%d,limit=%d,total_guarantee=%d,max_limit=%d\n",
- rcbs->res_name,
- shares.my_guarantee,
- shares.my_limit,
- shares.total_guarantee,
- shares.max_limit);
- }
- atomic_dec(&clstype->nr_resusers[i]);
- }
- return 0;
-}
-
-int
-ckrm_class_show_stats(struct ckrm_core_class *core, struct seq_file *seq)
-{
- int i;
- struct ckrm_res_ctlr *rcbs;
- struct ckrm_classtype *clstype = core->classtype;
-
- for (i = 0; i < clstype->max_resid; i++) {
- atomic_inc(&clstype->nr_resusers[i]);
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->get_stats)
- (*rcbs->get_stats)(core->res_class[i], seq);
- atomic_dec(&clstype->nr_resusers[i]);
- }
- return 0;
-}
-
-int
-ckrm_class_show_config(struct ckrm_core_class *core, struct seq_file *seq)
-{
- int i;
- struct ckrm_res_ctlr *rcbs;
- struct ckrm_classtype *clstype = core->classtype;
-
- for (i = 0; i < clstype->max_resid; i++) {
- atomic_inc(&clstype->nr_resusers[i]);
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->show_config)
- (*rcbs->show_config)(core->res_class[i], seq);
- atomic_dec(&clstype->nr_resusers[i]);
- }
- return 0;
-}
-
-int
-ckrm_class_set_config(struct ckrm_core_class *core, const char *resname, const char *cfgstr)
-{
- struct ckrm_classtype *clstype = core->classtype;
- struct ckrm_res_ctlr *rcbs = ckrm_resctlr_lookup(clstype,resname);
- int rc;
-
- if (rcbs == NULL || rcbs->set_config == NULL)
- return -EINVAL;
- rc = (*rcbs->set_config)(core->res_class[rcbs->resid],cfgstr);
- return rc;
-}
-
-int
-ckrm_class_set_shares(struct ckrm_core_class *core, const char *resname,
- struct ckrm_shares *shares)
-{
- struct ckrm_classtype *clstype = core->classtype;
- struct ckrm_res_ctlr *rcbs;
- int rc;
-
- printk("ckrm_class_set_shares(%s,%s)\n",core->name,resname);
- rcbs = ckrm_resctlr_lookup(clstype,resname);
- if (rcbs == NULL || rcbs->set_share_values == NULL)
- return -EINVAL;
- rc = (*rcbs->set_share_values)(core->res_class[rcbs->resid],shares);
- return rc;
-}
-
-int
-ckrm_class_reset_stats(struct ckrm_core_class *core, const char *resname, const char *unused)
-{
- struct ckrm_classtype *clstype = core->classtype;
- struct ckrm_res_ctlr *rcbs = ckrm_resctlr_lookup(clstype,resname);
- int rc;
-
- if (rcbs == NULL || rcbs->reset_stats == NULL)
- return -EINVAL;
- rc = (*rcbs->reset_stats)(core->res_class[rcbs->resid]);
- return rc;
-}
-
-/*******************************************************************
- * Initialization
- *******************************************************************/
-
-void
-ckrm_cb_newtask(struct task_struct *tsk)
-{
- tsk->ce_data = NULL;
- spin_lock_init(&tsk->ckrm_tsklock);
- ckrm_invoke_event_cb_chain(CKRM_EVENT_NEWTASK,tsk);
-}
-
-void
-ckrm_cb_exit(struct task_struct *tsk)
-{
- ckrm_invoke_event_cb_chain(CKRM_EVENT_EXIT,tsk);
- tsk->ce_data = NULL;
-}
-
-void __init
-ckrm_init(void)
-{
- printk("CKRM Initialization\n");
-
- // register/initialize the Metatypes
-
-#ifdef CONFIG_CKRM_TYPE_TASKCLASS
- {
- extern void ckrm_meta_init_taskclass(void);
- ckrm_meta_init_taskclass();
- }
-#endif
-#ifdef CONFIG_CKRM_TYPE_SOCKETCLASS
- {
- extern void ckrm_meta_init_sockclass(void);
- ckrm_meta_init_sockclass();
- }
-#endif
- // prepare init_task and then rely on inheritance of properties
- ckrm_cb_newtask(&init_task);
- printk("CKRM Initialization done\n");
-}
-
-EXPORT_SYMBOL(ckrm_register_engine);
-EXPORT_SYMBOL(ckrm_unregister_engine);
-
-EXPORT_SYMBOL(ckrm_register_res_ctlr);
-EXPORT_SYMBOL(ckrm_unregister_res_ctlr);
-
-EXPORT_SYMBOL(ckrm_init_core_class);
-EXPORT_SYMBOL(ckrm_free_core_class);
-EXPORT_SYMBOL(ckrm_release_core_class);
-
-EXPORT_SYMBOL(ckrm_register_classtype);
-EXPORT_SYMBOL(ckrm_unregister_classtype);
-EXPORT_SYMBOL(ckrm_find_classtype_by_name);
-
-EXPORT_SYMBOL(ckrm_core_grab);
-EXPORT_SYMBOL(ckrm_core_drop);
-EXPORT_SYMBOL(ckrm_is_core_valid);
-EXPORT_SYMBOL(ckrm_validate_and_grab_core);
-
-EXPORT_SYMBOL(ckrm_register_event_set);
-EXPORT_SYMBOL(ckrm_unregister_event_set);
-EXPORT_SYMBOL(ckrm_register_event_cb);
-EXPORT_SYMBOL(ckrm_unregister_event_cb);
-
-EXPORT_SYMBOL(ckrm_class_show_stats);
-EXPORT_SYMBOL(ckrm_class_show_config);
-EXPORT_SYMBOL(ckrm_class_show_shares);
-
-EXPORT_SYMBOL(ckrm_class_set_config);
-EXPORT_SYMBOL(ckrm_class_set_shares);
-
-EXPORT_SYMBOL(ckrm_class_reset_stats);
-
-
+++ /dev/null
-/* ckrm_socketaq.c - accept queue resource controller
- *
- * Copyright (C) Vivek Kashyap, IBM Corp. 2004
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- * Initial version
- */
-
-/* Code Description: TBD
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <asm/errno.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/ckrm.h>
-#include <linux/ckrm_rc.h>
-#include <net/tcp.h>
-
-#include <linux/ckrm_net.h>
-
-#define hnode_2_core(ptr) \
- ((ptr) ? container_of(ptr, struct ckrm_core_class, hnode) : NULL)
-
-
-#define CKRM_SAQ_MAX_DEPTH 3 // 0 => /rcfs
- // 1 => socket_aq
- // 2 => socket_aq/listen_class
- // 3 => socket_aq/listen_class/accept_queues
- // 4 => Not allowed
-
-typedef struct ckrm_laq_res {
- spinlock_t reslock;
- atomic_t refcnt;
- struct ckrm_shares shares;
- struct ckrm_core_class *core;
- struct ckrm_core_class *pcore;
- int my_depth;
- int my_id;
-} ckrm_laq_res_t;
-
-static int my_resid = -1;
-
-extern struct ckrm_core_class *rcfs_create_under_netroot(char *, int, int);
-extern struct ckrm_core_class *rcfs_make_core(struct dentry *,
- struct ckrm_core_class * ) ;
-
-void
-laq_res_hold(struct ckrm_laq_res *res)
-{
- atomic_inc(&res->refcnt);
- return;
-}
-
-void
-laq_res_put(struct ckrm_laq_res *res)
-{
- if (atomic_dec_and_test(&res->refcnt))
- kfree(res);
- return;
-}
-
-/* Initialize rescls values
- */
-static void
-laq_res_initcls(void *my_res)
-{
- ckrm_laq_res_t *res = my_res;
-
- res->shares.my_guarantee = CKRM_SHARE_DONTCARE;
- res->shares.my_limit = CKRM_SHARE_DONTCARE;
- res->shares.total_guarantee = CKRM_SHARE_DFLT_TOTAL_GUARANTEE;
- res->shares.max_limit = CKRM_SHARE_DFLT_MAX_LIMIT;
- res->shares.unused_guarantee = CKRM_SHARE_DFLT_TOTAL_GUARANTEE;
- res->shares.cur_max_limit = 0;
-}
-
-static int
-atoi(char *s)
-{
- int k = 0;
- while(*s)
- k = *s++ - '0' + (k * 10);
- return k;
-}
-
-static char *
-laq_get_name(struct ckrm_core_class *c)
-{
- char *p = (char *)c->name;
-
- while(*p)
- p++;
- while( *p != '/' && p != c->name)
- p--;
-
- return ++p;
-}
-
-static void *
-laq_res_alloc(struct ckrm_core_class *core, struct ckrm_core_class *parent)
-{
- ckrm_laq_res_t *res, *pres;
- int pdepth;
-
- if (parent)
- pres = ckrm_get_res_class(parent, my_resid, ckrm_laq_res_t);
- else
- pres = NULL;
-
- if (core == core->classtype->default_class)
- pdepth = 1;
- else {
- if (!parent)
- return NULL;
- pdepth = 1 + pres->my_depth;
- }
-
- res = kmalloc(sizeof(ckrm_laq_res_t), GFP_ATOMIC);
- if (res) {
- memset(res, 0, sizeof(res));
- spin_lock_init(&res->reslock);
- laq_res_hold(res);
- res->my_depth = pdepth;
- if (pdepth == 2) // listen class
- res->my_id = 0;
- else if (pdepth == 3)
- res->my_id = atoi(laq_get_name(core));
- res->core = core;
- res->pcore = parent;
-
- // rescls in place, now initialize contents other than
- // hierarchy pointers
- laq_res_initcls(res); // acts as initialising value
- }
-
- return res;
-}
-
-static void
-laq_res_free(void *my_res)
-{
- ckrm_laq_res_t *res = (ckrm_laq_res_t *)my_res;
- ckrm_laq_res_t *parent;
-
- if (!res)
- return;
-
- if (res->my_depth != 3) {
- kfree(res);
- return;
- }
-
- parent = ckrm_get_res_class(res->pcore, my_resid, ckrm_laq_res_t);
- if (!parent) // Should never happen
- return;
-
- spin_lock(&parent->reslock);
- spin_lock(&res->reslock);
-
- // return child's guarantee to parent node
- // Limits have no meaning for accept queue control
- child_guarantee_changed(&parent->shares, res->shares.my_guarantee, 0);
-
- spin_unlock(&res->reslock);
- laq_res_put(res);
- spin_unlock(&parent->reslock);
- return;
-}
-
-/**************************************************************************
- * SHARES ***
- **************************************************************************/
-
-void
-laq_set_aq_values(ckrm_laq_res_t *my_res, ckrm_laq_res_t *parent, int updatep)
-{
-
- struct ckrm_net_struct *ns;
- struct ckrm_core_class *core = parent->core;
- struct tcp_opt *tp;
-
- if (my_res->my_depth < 2)
- return;
-
- // XXX Instead of holding a class_lock introduce a rw
- // lock to be write locked by listen callbacks and read locked here.
- // - VK
- class_lock(core);
- list_for_each_entry(ns, &core->objlist,ckrm_link) {
- tp = tcp_sk(ns->ns_sk);
- if (updatep)
- tp->acceptq[0].aq_ratio =
- parent->shares.total_guarantee/
- parent->shares.unused_guarantee;
-
- tp->acceptq[my_res->my_id].aq_ratio =
- my_res->shares.total_guarantee/
- parent->shares.my_guarantee;
- }
- class_unlock(core);
- return;
-}
-
-static int
-laq_set_share_values(void *my_res, struct ckrm_shares *shares)
-{
- ckrm_laq_res_t *res = my_res;
- ckrm_laq_res_t *parent, *child;
- struct ckrm_hnode *chnode;
- int rc = 0;
-
- if (!res)
- return -EINVAL;
-
- if (!res->pcore) {
- // something is badly wrong
- printk(KERN_ERR "socketaq internal inconsistency\n");
- return -EBADF;
- }
-
- parent = ckrm_get_res_class(res->pcore, my_resid, ckrm_laq_res_t);
- if (!parent) // socket_class does not have a share interface
- return -EINVAL;
-
- // Ensure that we ignore limit values
- shares->my_limit = shares->max_limit = CKRM_SHARE_UNCHANGED;
-
- switch (res->my_depth) {
-
- case 0: printk(KERN_ERR "socketaq bad entry\n");
- rc = -EBADF;
- break;
-
- case 1: // can't be written to. this is internal default.
- // return -EINVAL
- rc = -EINVAL;
- break;
-
- case 2: // nothing to inherit
- if (!shares->total_guarantee) {
- rc = -EINVAL;
- break;
- }
-
- ckrm_lock_hier(res->pcore);
- spin_lock(&res->reslock);
- rc = set_shares(shares, &res->shares, NULL);
- if (!rc) {
- list_for_each_entry(chnode,
- &res->core->hnode.children,siblings){
- child=hnode_2_core(chnode)->res_class[my_resid];
- laq_set_aq_values(child,res,(child->my_id==1));
- }
- }
- spin_unlock(&res->reslock);
- ckrm_unlock_hier(res->pcore);
- break;
-
- case 3: // accept queue itself. Check against parent.
- ckrm_lock_hier(parent->pcore);
- spin_lock(&parent->reslock);
- rc = set_shares(shares, &res->shares, &parent->shares);
- if (!rc) {
- laq_set_aq_values(res,parent,1);
- }
- spin_unlock(&parent->reslock);
- ckrm_unlock_hier(parent->pcore);
- break;
- }
-
- return rc;
-}
-
-static int
-laq_get_share_values(void *my_res, struct ckrm_shares *shares)
-{
- ckrm_laq_res_t *res = my_res;
-
- if (!res)
- return -EINVAL;
- *shares = res->shares;
- return 0;
-}
-
-/**************************************************************************
- * STATS ***
- **************************************************************************/
-
-void
-laq_print_aq_stats(struct seq_file *sfile, struct tcp_acceptq_info *taq, int i)
-{
- seq_printf(sfile, "Class %d connections:\n\taccepted: %u\n\t"
- "queued: %u\n\twait_time: %lu\n\t",
- i, taq->acceptq_count, taq->acceptq_qcount,
- taq->acceptq_wait_time);
-
- if (i)
- return;
-
- for (i = 1; i < NUM_ACCEPT_QUEUES; i++) {
- taq[0].acceptq_wait_time += taq[i].acceptq_wait_time;
- taq[0].acceptq_qcount += taq[i].acceptq_qcount;
- taq[0].acceptq_count += taq[i].acceptq_count;
- }
-
- seq_printf(sfile, "Totals :\n\taccepted: %u\n\t"
- "queued: %u\n\twait_time: %lu\n",
- taq->acceptq_count, taq->acceptq_qcount,
- taq->acceptq_wait_time);
-
- return;
-}
-
-void
-laq_get_aq_stats(ckrm_laq_res_t *pres, ckrm_laq_res_t *mres,
- struct tcp_acceptq_info *taq)
-{
- struct ckrm_net_struct *ns;
- struct ckrm_core_class *core = pres->core;
- struct tcp_opt *tp;
- int a = mres->my_id;
- int z;
-
- if (a == 0)
- z = NUM_ACCEPT_QUEUES;
- else
- z = a+1;
-
- // XXX Instead of holding a class_lock introduce a rw
- // lock to be write locked by listen callbacks and read locked here.
- // - VK
- class_lock(pres->core);
- list_for_each_entry(ns, &core->objlist,ckrm_link) {
- tp = tcp_sk(ns->ns_sk);
- for (; a< z; a++) {
- taq->acceptq_wait_time += tp->acceptq[a].aq_wait_time;
- taq->acceptq_qcount += tp->acceptq[a].aq_qcount;
- taq->acceptq_count += tp->acceptq[a].aq_count;
- taq++;
- }
- }
- class_unlock(pres->core);
-}
-
-
-static int
-laq_get_stats(void *my_res, struct seq_file *sfile)
-{
- ckrm_laq_res_t *res = my_res;
- ckrm_laq_res_t *parent;
- struct tcp_acceptq_info taq[NUM_ACCEPT_QUEUES];
- int rc = 0;
-
- if (!res)
- return -EINVAL;
-
- if (!res->pcore) {
- // something is badly wrong
- printk(KERN_ERR "socketaq internal inconsistency\n");
- return -EBADF;
- }
-
- parent = ckrm_get_res_class(res->pcore, my_resid, ckrm_laq_res_t);
- if (!parent) { // socket_class does not have a stat interface
- printk(KERN_ERR "socketaq internal fs inconsistency\n");
- return -EINVAL;
- }
-
- memset(taq, 0, sizeof(struct tcp_acceptq_info) * NUM_ACCEPT_QUEUES);
-
- switch (res->my_depth) {
-
- default:
- case 0: printk(KERN_ERR "socket class bad entry\n");
- rc = -EBADF;
- break;
-
- case 1: // can't be read from. this is internal default.
- // return -EINVAL
- rc = -EINVAL;
- break;
-
- case 2: // return the default and total
- ckrm_lock_hier(res->core); // block any deletes
- laq_get_aq_stats(res, res, &taq[0]);
- laq_print_aq_stats(sfile, &taq[0], 0);
- ckrm_unlock_hier(res->core); // block any deletes
- break;
-
- case 3:
- ckrm_lock_hier(parent->core); // block any deletes
- laq_get_aq_stats(parent, res, &taq[res->my_id]);
- laq_print_aq_stats(sfile, &taq[res->my_id], res->my_id);
- ckrm_unlock_hier(parent->core); // block any deletes
- break;
- }
-
- return rc;
-}
-
-/*
- * The network connection is reclassified to this class. Update its shares.
- * The socket lock is held.
- */
-static void
-laq_change_resclass(void *n, void *old, void *r)
-{
- struct ckrm_net_struct *ns = (struct ckrm_net_struct *)n;
- struct ckrm_laq_res *res = (struct ckrm_laq_res *)r;
- struct ckrm_hnode *chnode = NULL;
-
-
- if (res->my_depth != 2)
- return;
-
- // a change to my_depth == 3 ie. the accept classes cannot happen.
- // there is no target file
- if (res->my_depth == 2) { // it is one of the socket classes
- struct ckrm_laq_res *reschild;
- struct sock *sk = ns->ns_sk;
- struct tcp_opt *tp = tcp_sk(sk);
-
- // share rule: hold parent resource lock. then self.
- // However, since my_depth == 1 is a generic class it is not
- // needed here. Self lock is enough.
- spin_lock(&res->reslock);
- tp->acceptq[0].aq_ratio = res->shares.total_guarantee/
- res->shares.unused_guarantee;
- list_for_each_entry(chnode,&res->core->hnode.children,siblings){
- reschild = hnode_2_core(chnode)->res_class[my_resid];
-
- spin_lock(&reschild->reslock);
- tp->acceptq[reschild->my_id].aq_ratio=
- reschild->shares.total_guarantee/
- res->shares.my_guarantee;
- spin_unlock(&reschild->reslock);
- }
- spin_unlock(&res->reslock);
- }
-
- return;
-}
-
-struct ckrm_res_ctlr laq_rcbs = {
- .res_name = "laq",
- .resid = -1 , // dynamically assigned
- .res_alloc = laq_res_alloc,
- .res_free = laq_res_free,
- .set_share_values = laq_set_share_values,
- .get_share_values = laq_get_share_values,
- .get_stats = laq_get_stats,
- .change_resclass = laq_change_resclass,
- // .res_initcls = laq_res_initcls, // LAQ_HUBERTUS: no need for this !!
-};
-
-int __init
-init_ckrm_laq_res(void)
-{
- struct ckrm_classtype *clstype;
- int resid;
-
- clstype = ckrm_find_classtype_by_name("socket_class");
- if (clstype == NULL) {
- printk(KERN_INFO " Unknown ckrm classtype<socket_class>");
- return -ENOENT;
- }
-
- if (my_resid == -1) {
- resid = ckrm_register_res_ctlr(clstype,&laq_rcbs);
- if (resid >= 0)
- my_resid = resid;
- printk("........init_ckrm_listen_aq_res -> %d\n",my_resid);
- }
- return 0;
-
-}
-
-void __exit
-exit_ckrm_laq_res(void)
-{
- ckrm_unregister_res_ctlr(&laq_rcbs);
- my_resid = -1;
-}
-
-
-module_init(init_ckrm_laq_res)
-module_exit(exit_ckrm_laq_res)
-
-MODULE_LICENSE("GPL");
-
+++ /dev/null
-/* ckrm_sock.c - Class-based Kernel Resource Management (CKRM)
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003,2004
- * (C) Shailabh Nagar, IBM Corp. 2003
- * (C) Chandra Seetharaman, IBM Corp. 2003
- * (C) Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Provides kernel API of CKRM for in-kernel,per-resource controllers
- * (one each for cpu, memory, io, network) and callbacks for
- * classification modules.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 28 Aug 2003
- * Created.
- * 06 Nov 2003
- * Made modifications to suit the new RBCE module.
- * 10 Nov 2003
- * Fixed a bug in fork and exit callbacks. Added callbacks_active and
- * surrounding logic. Added task paramter for all CE callbacks.
- * 23 Mar 2004
- * moved to referenced counted class objects and correct locking
- * 12 Apr 2004
- * introduced adopted to emerging classtype interface
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <asm/uaccess.h>
-#include <linux/mm.h>
-#include <asm/errno.h>
-#include <linux/string.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/ckrm_rc.h>
-#include <linux/parser.h>
-#include <net/tcp.h>
-
-#include <linux/ckrm_net.h>
-
-struct ckrm_sock_class {
- struct ckrm_core_class core;
-};
-
-static struct ckrm_sock_class sockclass_dflt_class = {
-};
-
-#define SOCKET_CLASS_TYPE_NAME "socket_class"
-
-const char *dflt_sockclass_name = SOCKET_CLASS_TYPE_NAME;
-
-static struct ckrm_core_class *sock_alloc_class(struct ckrm_core_class *parent, const char *name);
-static int sock_free_class(struct ckrm_core_class *core);
-
-static int sock_forced_reclassify(ckrm_core_class_t *target, const char *resname);
-static int sock_show_members(struct ckrm_core_class *core, struct seq_file *seq);
-static void sock_add_resctrl(struct ckrm_core_class *core, int resid);
-static void sock_reclassify_class(struct ckrm_sock_class *cls);
-
-struct ckrm_classtype CT_sockclass = {
- .mfidx = 1,
- .name = SOCKET_CLASS_TYPE_NAME,
- .typeID = CKRM_CLASSTYPE_SOCKET_CLASS,
- .maxdepth = 3,
- .resid_reserved = 0,
- .max_res_ctlrs = CKRM_MAX_RES_CTLRS,
- .max_resid = 0,
- .bit_res_ctlrs = 0L,
- .res_ctlrs_lock = SPIN_LOCK_UNLOCKED,
- .classes = LIST_HEAD_INIT(CT_sockclass.classes),
-
- .default_class = &sockclass_dflt_class.core,
-
- // private version of functions
- .alloc = &sock_alloc_class,
- .free = &sock_free_class,
- .show_members = &sock_show_members,
- .forced_reclassify = &sock_forced_reclassify,
-
- // use of default functions
- .show_shares = &ckrm_class_show_shares,
- .show_stats = &ckrm_class_show_stats,
- .show_config = &ckrm_class_show_config,
- .set_config = &ckrm_class_set_config,
- .set_shares = &ckrm_class_set_shares,
- .reset_stats = &ckrm_class_reset_stats,
-
- // mandatory private version .. no dflt available
- .add_resctrl = &sock_add_resctrl,
-};
-
-/* helper functions */
-
-void
-ckrm_ns_hold(struct ckrm_net_struct *ns)
-{
- atomic_inc(&ns->ns_refcnt);
- return;
-}
-
-void
-ckrm_ns_put(struct ckrm_net_struct *ns)
-{
- if (atomic_dec_and_test(&ns->ns_refcnt))
- kfree(ns);
-
- return;
-}
-/*
- * Change the class of a netstruct
- *
- * Change the task's task class to "newcls" if the task's current
- * class (task->taskclass) is same as given "oldcls", if it is non-NULL.
- *
- */
-
-static void
-sock_set_class(struct ckrm_net_struct *ns, struct ckrm_sock_class *newcls,
- struct ckrm_sock_class *oldcls, enum ckrm_event event)
-{
- int i;
- struct ckrm_res_ctlr *rcbs;
- struct ckrm_classtype *clstype;
- void *old_res_class, *new_res_class;
-
- if ((newcls == oldcls) || (newcls == NULL)) {
- ns->core = (void *)oldcls;
- return;
- }
-
- class_lock(class_core(newcls));
- ns->core = newcls;
- list_add(&ns->ckrm_link, &class_core(newcls)->objlist);
- class_unlock(class_core(newcls));
-
- clstype = class_isa(newcls);
- for (i = 0; i < clstype->max_resid; i++) {
- atomic_inc(&clstype->nr_resusers[i]);
- old_res_class = oldcls ? class_core(oldcls)->res_class[i] : NULL;
- new_res_class = newcls ? class_core(newcls)->res_class[i] : NULL;
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->change_resclass && (old_res_class != new_res_class))
- (*rcbs->change_resclass)(ns, old_res_class, new_res_class);
- atomic_dec(&clstype->nr_resusers[i]);
- }
- return;
-}
-
-static void
-sock_add_resctrl(struct ckrm_core_class *core, int resid)
-{
- struct ckrm_net_struct *ns;
- struct ckrm_res_ctlr *rcbs;
-
- if ((resid < 0) || (resid >= CKRM_MAX_RES_CTLRS) || ((rcbs = core->classtype->res_ctlrs[resid]) == NULL))
- return;
-
- class_lock(core);
- list_for_each_entry(ns, &core->objlist, ckrm_link) {
- if (rcbs->change_resclass)
- (*rcbs->change_resclass)(ns, NULL, core->res_class[resid]);
- }
- class_unlock(core);
-}
-
-
-/**************************************************************************
- * Functions called from classification points *
- **************************************************************************/
-
-static void
-cb_sockclass_listen_start(struct sock *sk)
-{
- struct ckrm_net_struct *ns = NULL;
- struct ckrm_sock_class *newcls = NULL;
- struct ckrm_res_ctlr *rcbs;
- struct ckrm_classtype *clstype;
- int i = 0;
-
- // XXX - TBD ipv6
- if (sk->sk_family == IPPROTO_IPV6)
- return;
-
- // to store the socket address
- ns = (struct ckrm_net_struct *)
- kmalloc(sizeof(struct ckrm_net_struct), GFP_ATOMIC);
- if (!ns)
- return;
-
- memset(ns,0, sizeof(ns));
- INIT_LIST_HEAD(&ns->ckrm_link);
-
- ns->ns_family = sk->sk_family;
- if (ns->ns_family == IPPROTO_IPV6) // IPv6 not supported yet.
- return;
-
- ns->ns_daddrv4 = inet_sk(sk)->rcv_saddr;
- ns->ns_dport = inet_sk(sk)->num;
-
- ns->ns_pid = current->pid;
- ns->ns_tgid = current->tgid;
-
- ce_protect(&CT_sockclass);
- CE_CLASSIFY_RET(newcls,&CT_sockclass,CKRM_EVENT_LISTEN_START,ns,current);
- ce_release(&CT_sockclass);
-
- if (newcls == NULL) {
- newcls = &sockclass_dflt_class;
- ckrm_core_grab(class_core(newcls));
- }
-
- class_lock(class_core(newcls));
- list_add(&ns->ckrm_link, &class_core(newcls)->objlist);
- ckrm_ns_put(ns);
- ns->core = newcls;
- class_unlock(class_core(newcls));
-
-
- // the socket is already locked
- // take a reference on socket on our behalf
- sock_hold(sk);
- sk->sk_ns = (void *)ns;
- ns->ns_sk = sk;
-
- // modify its shares
- clstype = class_isa(newcls);
- for (i = 0; i < clstype->max_resid; i++) {
- atomic_inc(&clstype->nr_resusers[i]);
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->change_resclass) {
- (*rcbs->change_resclass)((void *)ns,
- NULL,class_core(newcls)->res_class[i]);
- }
- atomic_dec(&clstype->nr_resusers[i]);
- }
- return;
-}
-
-static void
-cb_sockclass_listen_stop(struct sock *sk)
-{
- struct ckrm_net_struct *ns = NULL;
- struct ckrm_sock_class *newcls = NULL;
-
- // XXX - TBD ipv6
- if (sk->sk_family == IPPROTO_IPV6)
- return;
-
- ns = (struct ckrm_net_struct *)sk->sk_ns;
- if (!ns) // listen_start called before socket_aq was loaded
- return;
-
- newcls = ns->core;
- if (newcls) {
- class_lock(class_core(newcls));
- list_del(&ns->ckrm_link);
- INIT_LIST_HEAD(&ns->ckrm_link);
- class_unlock(class_core(newcls));
- ckrm_core_drop(class_core(newcls));
- }
-
- // the socket is already locked
- sk->sk_ns = NULL;
- sock_put(sk);
-
- // Should be the last count and free it
- ckrm_ns_put(ns);
- return;
-}
-
-static struct ckrm_event_spec sock_events_callbacks[] = {
- CKRM_EVENT_SPEC( LISTEN_START, cb_sockclass_listen_start ),
- CKRM_EVENT_SPEC( LISTEN_STOP, cb_sockclass_listen_stop ),
- { -1 }
-};
-
-/**************************************************************************
- * Class Object Creation / Destruction
- **************************************************************************/
-
-static struct ckrm_core_class *
-sock_alloc_class(struct ckrm_core_class *parent, const char *name)
-{
- struct ckrm_sock_class *sockcls;
- sockcls = kmalloc(sizeof(struct ckrm_sock_class), GFP_KERNEL);
- if (sockcls == NULL)
- return NULL;
-
- ckrm_init_core_class(&CT_sockclass,class_core(sockcls),parent,name);
-
- ce_protect(&CT_sockclass);
- if (CT_sockclass.ce_cb_active && CT_sockclass.ce_callbacks.class_add)
- (*CT_sockclass.ce_callbacks.class_add)(name,sockcls);
- ce_release(&CT_sockclass);
-
- return class_core(sockcls);
-}
-
-static int
-sock_free_class(struct ckrm_core_class *core)
-{
- struct ckrm_sock_class *sockcls;
-
- if (!ckrm_is_core_valid(core)) {
- // Invalid core
- return (-EINVAL);
- }
- if (core == core->classtype->default_class) {
- // reset the name tag
- core->name = dflt_sockclass_name;
- return 0;
- }
-
- sockcls = class_type(struct ckrm_sock_class, core);
-
- ce_protect(&CT_sockclass);
-
- if (CT_sockclass.ce_cb_active && CT_sockclass.ce_callbacks.class_delete)
- (*CT_sockclass.ce_callbacks.class_delete)(core->name,sockcls);
-
- sock_reclassify_class ( sockcls );
-
- ce_release(&CT_sockclass);
-
- ckrm_release_core_class(core); // Hubertus .... could just drop the class .. error message
- return 0;
-}
-
-
-static int
-sock_show_members(struct ckrm_core_class *core, struct seq_file *seq)
-{
- struct list_head *lh;
- struct ckrm_net_struct *ns = NULL;
-
- class_lock(core);
- list_for_each(lh, &core->objlist) {
- ns = container_of(lh, struct ckrm_net_struct,ckrm_link);
- seq_printf(seq, "%d.%d.%d.%d\\%d\n",
- NIPQUAD(ns->ns_daddrv4),ns->ns_dport);
- }
- class_unlock(core);
-
- return 0;
-}
-
-static int
-sock_forced_reclassify_ns(struct ckrm_net_struct *tns, struct ckrm_core_class *core)
-{
- struct ckrm_net_struct *ns = NULL;
- struct sock *sk = NULL;
- struct ckrm_sock_class *oldcls, *newcls;
- int rc = -EINVAL;
-
- if (!ckrm_is_core_valid(core)) {
- return rc;
- }
-
- newcls = class_type(struct ckrm_sock_class, core);
- // lookup the listening sockets
- // returns with a reference count set on socket
- sk = tcp_v4_lookup_listener(tns->ns_daddrv4,tns->ns_dport,0);
- if (!sk) {
- printk(KERN_INFO "No such listener 0x%x:%d\n",
- tns->ns_daddrv4, tns->ns_dport);
- return rc;
- }
- lock_sock(sk);
- if (!sk->sk_ns) {
- goto out;
- }
- ns = sk->sk_ns;
- ckrm_ns_hold(ns);
- oldcls = ns->core;
- if ((oldcls == NULL) || (oldcls == newcls)) {
- ckrm_ns_put(ns);
- goto out;
- }
-
- // remove the net_struct from the current class
- class_lock(class_core(oldcls));
- list_del(&ns->ckrm_link);
- INIT_LIST_HEAD(&ns->ckrm_link);
- ns->core = NULL;
- class_unlock(class_core(oldcls));
-
- sock_set_class(ns, newcls, oldcls, CKRM_EVENT_MANUAL);
- ckrm_ns_put(ns);
- rc = 0;
-out:
- release_sock(sk);
- sock_put(sk);
-
- return rc;
-
-}
-
-enum sock_target_token_t {
- IPV4, IPV6, SOCKC_TARGET_ERR
-};
-
-static match_table_t sock_target_tokens = {
- {IPV4, "ipv4=%s"},
- {IPV6, "ipv6=%s"},
- {SOCKC_TARGET_ERR, NULL},
-};
-
-char *
-v4toi(char *s, char c, __u32 *v)
-{
- unsigned int k = 0, n = 0;
-
- while(*s && (*s != c)) {
- if (*s == '.') {
- n <<= 8;
- n |= k;
- k = 0;
- }
- else
- k = k *10 + *s - '0';
- s++;
- }
-
- n <<= 8;
- *v = n | k;
-
- return s;
-}
-
-static int
-sock_forced_reclassify(struct ckrm_core_class *target,const char *options)
-{
- char *p,*p2;
- struct ckrm_net_struct ns;
- __u32 v4addr, tmp;
-
- if (!options)
- return 1;
-
- while ((p = strsep((char**)&options, ",")) != NULL) {
- substring_t args[MAX_OPT_ARGS];
- int token;
-
- if (!*p)
- continue;
- token = match_token(p, sock_target_tokens, args);
- switch (token) {
-
- case IPV4:
-
- p2 = p;
- while(*p2 && (*p2 != '='))
- ++p2;
- p2++;
- p2 = v4toi(p2, '\\',&(v4addr));
- ns.ns_daddrv4 = htonl(v4addr);
- ns.ns_family = 4; //IPPROTO_IPV4
- p2 = v4toi(++p2, ':',&tmp); ns.ns_dport = (__u16)tmp;
- p2 = v4toi(++p2,'\0',&ns.ns_pid);
-
- sock_forced_reclassify_ns(&ns,target);
- break;
-
- case IPV6:
- printk(KERN_INFO "rcfs: IPV6 not supported yet\n");
- return 0;
- default:
- return 0;
- }
- }
- return 1;
-}
-
-/*
- * Listen_aq reclassification.
- */
-static void
-sock_reclassify_class(struct ckrm_sock_class *cls)
-{
- struct ckrm_net_struct *ns, *tns;
- struct ckrm_core_class *core = class_core(cls);
- LIST_HEAD(local_list);
-
- if (!cls)
- return;
-
- if (!ckrm_validate_and_grab_core(core))
- return;
-
- class_lock(core);
- // we have the core refcnt
- if (list_empty(&core->objlist)) {
- class_unlock(core);
- ckrm_core_drop(core);
- return;
- }
-
- INIT_LIST_HEAD(&local_list);
- list_splice_init(&core->objlist, &local_list);
- class_unlock(core);
- ckrm_core_drop(core);
-
- list_for_each_entry_safe(ns, tns, &local_list, ckrm_link) {
- ckrm_ns_hold(ns);
- list_del(&ns->ckrm_link);
- if (ns->ns_sk) {
- lock_sock(ns->ns_sk);
- sock_set_class(ns, &sockclass_dflt_class, NULL, CKRM_EVENT_MANUAL);
- release_sock(ns->ns_sk);
- }
- ckrm_ns_put(ns);
- }
- return ;
-}
-
-void __init
-ckrm_meta_init_sockclass(void)
-{
- printk("...... Initializing ClassType<%s> ........\n",CT_sockclass.name);
- // intialize the default class
- ckrm_init_core_class(&CT_sockclass, class_core(&sockclass_dflt_class),
- NULL,dflt_sockclass_name);
-
- // register classtype and initialize default task class
- ckrm_register_classtype(&CT_sockclass);
- ckrm_register_event_set(sock_events_callbacks);
-
- // note registeration of all resource controllers will be done later dynamically
- // as these are specified as modules
-}
-
-
-
-#if 1
-
-/***************************************************************************************
- * Debugging Network Classes: Utility functions
- **************************************************************************************/
-
-#endif
+++ /dev/null
-/* ckrm_numtasks.c - "Number of tasks" resource controller for CKRM
- *
- * Copyright (C) Chandra Seetharaman, IBM Corp. 2003
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 31 Mar 2004: Created
- *
- */
-
-/*
- * Code Description: TBD
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <asm/errno.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/ckrm.h>
-#include <linux/ckrm_rc.h>
-#include <linux/ckrm_tc.h>
-
-#define TOTAL_NUM_TASKS (131072) // 128 K
-#define NUMTASKS_DEBUG
-#define NUMTASKS_NAME "numtasks"
-
-typedef struct ckrm_numtasks {
- struct ckrm_core_class *core; // the core i am part of...
- struct ckrm_core_class *parent; // parent of the core above.
- struct ckrm_shares shares;
- spinlock_t cnt_lock; // always grab parent's lock first and then child's
- int cnt_guarantee; // num_tasks guarantee in local units
- int cnt_unused; // has to borrow if more than this is needed
- int cnt_limit; // no tasks over this limit.
- atomic_t cnt_cur_alloc; // current alloc from self
- atomic_t cnt_borrowed; // borrowed from the parent
-
- int over_guarantee; //turn on/off when cur_alloc goes over/under guarantee
-
- // internally maintained statictics to compare with max numbers
- int limit_failures; // no. of failures 'cause the request was over the limit
- int borrow_sucesses; // no. of successful borrows
- int borrow_failures; // no. of borrow faileures
-
- // Maximum the specific statictics has reached.
- int max_limit_failures;
- int max_borrow_sucesses;
- int max_borrow_failures;
-
- // Total number of specific statistics
- int tot_limit_failures;
- int tot_borrow_sucesses;
- int tot_borrow_failures;
-} ckrm_numtasks_t;
-
-struct ckrm_res_ctlr numtasks_rcbs;
-
-/* Initialize rescls values
- * May be called on each rcfs unmount or as part of error recovery
- * to make share values sane.
- * Does not traverse hierarchy reinitializing children.
- */
-static void
-numtasks_res_initcls_one(ckrm_numtasks_t *res)
-{
- res->shares.my_guarantee = CKRM_SHARE_DONTCARE;
- res->shares.my_limit = CKRM_SHARE_DONTCARE;
- res->shares.total_guarantee = CKRM_SHARE_DFLT_TOTAL_GUARANTEE;
- res->shares.max_limit = CKRM_SHARE_DFLT_MAX_LIMIT;
- res->shares.unused_guarantee = CKRM_SHARE_DFLT_TOTAL_GUARANTEE;
- res->shares.cur_max_limit = 0;
-
- res->cnt_guarantee = CKRM_SHARE_DONTCARE;
- res->cnt_unused = CKRM_SHARE_DONTCARE;
- res->cnt_limit = CKRM_SHARE_DONTCARE;
-
- res->over_guarantee = 0;
-
- res->limit_failures = 0;
- res->borrow_sucesses = 0;
- res->borrow_failures = 0;
-
- res->max_limit_failures = 0;
- res->max_borrow_sucesses = 0;
- res->max_borrow_failures = 0;
-
- res->tot_limit_failures = 0;
- res->tot_borrow_sucesses = 0;
- res->tot_borrow_failures = 0;
-
- atomic_set(&res->cnt_cur_alloc, 0);
- atomic_set(&res->cnt_borrowed, 0);
- return;
-}
-
-#if 0
-static void
-numtasks_res_initcls(void *my_res)
-{
- ckrm_numtasks_t *res = my_res;
-
- /* Write a version which propagates values all the way down
- and replace rcbs callback with that version */
-
-}
-#endif
-
-int
-numtasks_get_ref(void *arg, int force)
-{
- int rc, resid = numtasks_rcbs.resid;
- ckrm_numtasks_t *res;
- ckrm_core_class_t *core = arg;
-
- if ((resid < 0) || (core == NULL))
- return 1;
-
- res = ckrm_get_res_class(core, resid, ckrm_numtasks_t);
- if (res == NULL)
- return 1;
-
- atomic_inc(&res->cnt_cur_alloc);
-
- rc = 1;
- if (((res->parent) && (res->cnt_unused == CKRM_SHARE_DONTCARE)) ||
- (atomic_read(&res->cnt_cur_alloc) > res->cnt_unused)) {
-
- rc = 0;
- if (!force && (res->cnt_limit != CKRM_SHARE_DONTCARE) &&
- (atomic_read(&res->cnt_cur_alloc) > res->cnt_limit)) {
- res->limit_failures++;
- res->tot_limit_failures++;
- } else if (res->parent != NULL) {
- if ((rc = numtasks_get_ref(res->parent, force)) == 1) {
- atomic_inc(&res->cnt_borrowed);
- res->borrow_sucesses++;
- res->tot_borrow_sucesses++;
- res->over_guarantee = 1;
- } else {
- res->borrow_failures++;
- res->tot_borrow_failures++;
- }
- } else {
- rc = force;
- }
- } else if (res->over_guarantee) {
- res->over_guarantee = 0;
-
- if (res->max_limit_failures < res->limit_failures) {
- res->max_limit_failures = res->limit_failures;
- }
- if (res->max_borrow_sucesses < res->borrow_sucesses) {
- res->max_borrow_sucesses = res->borrow_sucesses;
- }
- if (res->max_borrow_failures < res->borrow_failures) {
- res->max_borrow_failures = res->borrow_failures;
- }
- res->limit_failures = 0;
- res->borrow_sucesses = 0;
- res->borrow_failures = 0;
- }
-
- if (!rc) {
- atomic_dec(&res->cnt_cur_alloc);
- }
- return rc;
-}
-
-void
-numtasks_put_ref(void *arg)
-{
- int resid = numtasks_rcbs.resid;
- ckrm_numtasks_t *res;
- ckrm_core_class_t *core = arg;
-
- if ((resid == -1) || (core == NULL)) {
- return;
- }
-
- res = ckrm_get_res_class(core, resid, ckrm_numtasks_t);
- if (res == NULL)
- return;
- atomic_dec(&res->cnt_cur_alloc);
- if (atomic_read(&res->cnt_borrowed) > 0) {
- atomic_dec(&res->cnt_borrowed);
- numtasks_put_ref(res->parent);
- }
- return;
-}
-
-static void *
-numtasks_res_alloc(struct ckrm_core_class *core, struct ckrm_core_class *parent)
-{
- ckrm_numtasks_t *res;
-
- res = kmalloc(sizeof(ckrm_numtasks_t), GFP_ATOMIC);
-
- if (res) {
- res->core = core;
- res->parent = parent;
- numtasks_res_initcls_one(res);
- res->cnt_lock = SPIN_LOCK_UNLOCKED;
- if (parent == NULL) {
- // I am part of root class. so set the max tasks to available
- // default
- res->cnt_guarantee = TOTAL_NUM_TASKS;
- res->cnt_unused = TOTAL_NUM_TASKS;
- res->cnt_limit = TOTAL_NUM_TASKS;
- }
- } else {
- printk(KERN_ERR "numtasks_res_alloc: failed GFP_ATOMIC alloc\n");
- }
- return res;
-}
-
-/*
- * No locking of this resource class object necessary as we are not
- * supposed to be assigned (or used) when/after this function is called.
- */
-static void
-numtasks_res_free(void *my_res)
-{
- ckrm_numtasks_t *res = my_res, *parres, *childres;
- ckrm_core_class_t *child = NULL;
- int i, borrowed, maxlimit, resid = numtasks_rcbs.resid;
-
- if (!res)
- return;
-
- // Assuming there will be no children when this function is called
-
- parres = ckrm_get_res_class(res->parent, resid, ckrm_numtasks_t);
-
- if (unlikely(atomic_read(&res->cnt_cur_alloc) != 0 ||
- atomic_read(&res->cnt_borrowed))) {
- printk(KERN_ERR "numtasks_res_free: resource still alloc'd %p\n", res);
- if ((borrowed = atomic_read(&res->cnt_borrowed)) > 0) {
- for (i = 0; i < borrowed; i++) {
- numtasks_put_ref(parres->core);
- }
- }
- }
-
- // return child's limit/guarantee to parent node
- spin_lock(&parres->cnt_lock);
- child_guarantee_changed(&parres->shares, res->shares.my_guarantee, 0);
-
- // run thru parent's children and get the new max_limit of the parent
- ckrm_lock_hier(parres->core);
- maxlimit = 0;
- while ((child = ckrm_get_next_child(parres->core, child)) != NULL) {
- childres = ckrm_get_res_class(child, resid, ckrm_numtasks_t);
- if (maxlimit < childres->shares.my_limit) {
- maxlimit = childres->shares.my_limit;
- }
- }
- ckrm_unlock_hier(parres->core);
- if (parres->shares.cur_max_limit < maxlimit) {
- parres->shares.cur_max_limit = maxlimit;
- }
-
- spin_unlock(&parres->cnt_lock);
- kfree(res);
- return;
-}
-/*
- * Recalculate the guarantee and limit in real units... and propagate the
- * same to children.
- * Caller is responsible for protecting res and for the integrity of parres
- */
-static void
-recalc_and_propagate(ckrm_numtasks_t *res, ckrm_numtasks_t *parres)
-{
- ckrm_core_class_t *child = NULL;
- ckrm_numtasks_t *childres;
- int resid = numtasks_rcbs.resid;
-
- if (parres) {
- struct ckrm_shares *par = &parres->shares;
- struct ckrm_shares *self = &res->shares;
-
- // calculate cnt_guarantee and cnt_limit
- //
- if (parres->cnt_guarantee == CKRM_SHARE_DONTCARE) {
- res->cnt_guarantee = CKRM_SHARE_DONTCARE;
- } else {
- res->cnt_guarantee = (self->my_guarantee * parres->cnt_guarantee)
- / par->total_guarantee;
- }
- if (parres->cnt_limit == CKRM_SHARE_DONTCARE) {
- res->cnt_limit = CKRM_SHARE_DONTCARE;
- } else {
- res->cnt_limit = (self->my_limit * parres->cnt_limit)
- / par->max_limit;
- }
-
- // Calculate unused units
- if (res->cnt_guarantee == CKRM_SHARE_DONTCARE) {
- res->cnt_unused = CKRM_SHARE_DONTCARE;
- } else {
- res->cnt_unused = (self->unused_guarantee *
- res->cnt_guarantee) / self->total_guarantee;
- }
- }
-
- // propagate to children
- ckrm_lock_hier(res->core);
- while ((child = ckrm_get_next_child(res->core, child)) != NULL) {
- childres = ckrm_get_res_class(child, resid, ckrm_numtasks_t);
-
- spin_lock(&childres->cnt_lock);
- recalc_and_propagate(childres, res);
- spin_unlock(&childres->cnt_lock);
- }
- ckrm_unlock_hier(res->core);
- return;
-}
-
-static int
-numtasks_set_share_values(void *my_res, struct ckrm_shares *new)
-{
- ckrm_numtasks_t *parres, *res = my_res;
- struct ckrm_shares *cur = &res->shares, *par;
- int rc = -EINVAL, resid = numtasks_rcbs.resid;
-
- if (!res)
- return rc;
-
- if (res->parent) {
- parres = ckrm_get_res_class(res->parent, resid, ckrm_numtasks_t);
- spin_lock(&parres->cnt_lock);
- spin_lock(&res->cnt_lock);
- par = &parres->shares;
- } else {
- spin_lock(&res->cnt_lock);
- par = NULL;
- parres = NULL;
- }
-
- rc = set_shares(new, cur, par);
-
- if ((rc == 0) && parres) {
- // Calculate parent's unused units
- if (parres->cnt_guarantee == CKRM_SHARE_DONTCARE) {
- parres->cnt_unused = CKRM_SHARE_DONTCARE;
- } else {
- parres->cnt_unused = (par->unused_guarantee *
- parres->cnt_guarantee) / par->total_guarantee;
- }
-
- recalc_and_propagate(res, parres);
- }
- spin_unlock(&res->cnt_lock);
- if (res->parent) {
- spin_unlock(&parres->cnt_lock);
- }
- return rc;
-}
-
-
-static int
-numtasks_get_share_values(void *my_res, struct ckrm_shares *shares)
-{
- ckrm_numtasks_t *res = my_res;
-
- if (!res)
- return -EINVAL;
- *shares = res->shares;
- return 0;
-}
-
-static int
-numtasks_get_stats(void *my_res, struct seq_file *sfile)
-{
- ckrm_numtasks_t *res = my_res;
-
- if (!res)
- return -EINVAL;
-
- seq_printf(sfile, "Number of tasks resource:\n");
- seq_printf(sfile, "Total Over limit failures: %d\n",
- res->tot_limit_failures);
- seq_printf(sfile, "Total Over guarantee sucesses: %d\n",
- res->tot_borrow_sucesses);
- seq_printf(sfile, "Total Over guarantee failures: %d\n",
- res->tot_borrow_failures);
-
- seq_printf(sfile, "Maximum Over limit failures: %d\n",
- res->max_limit_failures);
- seq_printf(sfile, "Maximum Over guarantee sucesses: %d\n",
- res->max_borrow_sucesses);
- seq_printf(sfile, "Maximum Over guarantee failures: %d\n",
- res->max_borrow_failures);
-#ifdef NUMTASKS_DEBUG
- seq_printf(sfile, "cur_alloc %d; borrowed %d; cnt_guar %d; cnt_limit %d "
- "unused_guarantee %d, cur_max_limit %d\n",
- atomic_read(&res->cnt_cur_alloc),
- atomic_read(&res->cnt_borrowed),
- res->cnt_guarantee,
- res->cnt_limit,
- res->shares.unused_guarantee,
- res->shares.cur_max_limit);
-#endif
-
- return 0;
-}
-
-static int
-numtasks_show_config(void *my_res, struct seq_file *sfile)
-{
- ckrm_numtasks_t *res = my_res;
-
- if (!res)
- return -EINVAL;
-
- seq_printf(sfile, "res=%s,parameter=somevalue\n",NUMTASKS_NAME);
- return 0;
-}
-
-static int
-numtasks_set_config(void *my_res, const char *cfgstr)
-{
- ckrm_numtasks_t *res = my_res;
-
- if (!res)
- return -EINVAL;
- printk("numtasks config='%s'\n",cfgstr);
- return 0;
-}
-
-static void
-numtasks_change_resclass(void *task, void *old, void *new)
-{
- ckrm_numtasks_t *oldres = old;
- ckrm_numtasks_t *newres = new;
-
- if (oldres != (void *) -1) {
- struct task_struct *tsk = task;
- if (!oldres) {
- struct ckrm_core_class *old_core = &(tsk->parent->taskclass->core);
- oldres = ckrm_get_res_class(old_core, numtasks_rcbs.resid,
- ckrm_numtasks_t);
- }
- numtasks_put_ref(oldres->core);
- }
- if (newres) {
- (void) numtasks_get_ref(newres->core, 1);
- }
-}
-
-struct ckrm_res_ctlr numtasks_rcbs = {
- .res_name = NUMTASKS_NAME,
- .res_hdepth = 1,
- .resid = -1,
- .res_alloc = numtasks_res_alloc,
- .res_free = numtasks_res_free,
- .set_share_values = numtasks_set_share_values,
- .get_share_values = numtasks_get_share_values,
- .get_stats = numtasks_get_stats,
- .show_config = numtasks_show_config,
- .set_config = numtasks_set_config,
- .change_resclass = numtasks_change_resclass,
-};
-
-int __init
-init_ckrm_numtasks_res(void)
-{
- struct ckrm_classtype *clstype;
- int resid = numtasks_rcbs.resid;
-
- clstype = ckrm_find_classtype_by_name("taskclass");
- if (clstype == NULL) {
- printk(KERN_INFO " Unknown ckrm classtype<taskclass>");
- return -ENOENT;
- }
-
- if (resid == -1) {
- resid = ckrm_register_res_ctlr(clstype,&numtasks_rcbs);
- printk("........init_ckrm_numtasks_res -> %d\n",resid);
- }
- return 0;
-}
-
-void __exit
-exit_ckrm_numtasks_res(void)
-{
- ckrm_unregister_res_ctlr(&numtasks_rcbs);
- numtasks_rcbs.resid = -1;
-}
-
-module_init(init_ckrm_numtasks_res)
-module_exit(exit_ckrm_numtasks_res)
-
-EXPORT_SYMBOL(numtasks_get_ref);
-EXPORT_SYMBOL(numtasks_put_ref);
-
-MODULE_LICENSE("GPL");
-
+++ /dev/null
-/* ckrm_tc.c - Class-based Kernel Resource Management (CKRM)
- *
- * Copyright (C) Hubertus Franke, IBM Corp. 2003,2004
- * (C) Shailabh Nagar, IBM Corp. 2003
- * (C) Chandra Seetharaman, IBM Corp. 2003
- * (C) Vivek Kashyap, IBM Corp. 2004
- *
- *
- * Provides kernel API of CKRM for in-kernel,per-resource controllers
- * (one each for cpu, memory, io, network) and callbacks for
- * classification modules.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 28 Aug 2003
- * Created.
- * 06 Nov 2003
- * Made modifications to suit the new RBCE module.
- * 10 Nov 2003
- * Fixed a bug in fork and exit callbacks. Added callbacks_active and
- * surrounding logic. Added task paramter for all CE callbacks.
- * 23 Mar 2004
- * moved to referenced counted class objects and correct locking
- * 12 Apr 2004
- * introduced adopted to emerging classtype interface
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <asm/uaccess.h>
-#include <linux/mm.h>
-#include <asm/errno.h>
-#include <linux/string.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/ckrm_rc.h>
-
-#include <linux/ckrm_tc.h>
-
-
-
-#define TC_DEBUG(fmt, args...) do { /* printk("%s: " fmt, __FUNCTION__ , ## args); */ } while (0)
-
-
-static struct ckrm_task_class taskclass_dflt_class = {
-};
-
-const char *dflt_taskclass_name = TASK_CLASS_TYPE_NAME;
-
-static struct ckrm_core_class *ckrm_alloc_task_class(struct ckrm_core_class *parent, const char *name);
-static int ckrm_free_task_class(struct ckrm_core_class *core);
-
-static int tc_forced_reclassify(ckrm_core_class_t *target, const char *resname);
-static int tc_show_members(struct ckrm_core_class *core, struct seq_file *seq);
-static void tc_add_resctrl(struct ckrm_core_class *core, int resid);
-
-struct ckrm_classtype CT_taskclass = {
- .mfidx = TC_MF_IDX,
- .name = TASK_CLASS_TYPE_NAME,
- .typeID = CKRM_CLASSTYPE_TASK_CLASS,
- .maxdepth = 3, // Hubertus .. just to start
- .resid_reserved = 4, // Hubertus .. reservation
- .max_res_ctlrs = CKRM_MAX_RES_CTLRS,
- .max_resid = 0,
- .bit_res_ctlrs = 0L,
- .res_ctlrs_lock = SPIN_LOCK_UNLOCKED,
- .classes = LIST_HEAD_INIT(CT_taskclass.classes),
-
- .default_class = &taskclass_dflt_class.core,
-
- // private version of functions
- .alloc = &ckrm_alloc_task_class,
- .free = &ckrm_free_task_class,
- .show_members = &tc_show_members,
- .forced_reclassify = &tc_forced_reclassify,
-
- // use of default functions
- .show_shares = &ckrm_class_show_shares,
- .show_stats = &ckrm_class_show_stats,
- .show_config = &ckrm_class_show_config,
- .set_config = &ckrm_class_set_config,
- .set_shares = &ckrm_class_set_shares,
- .reset_stats = &ckrm_class_reset_stats,
-
- // mandatory private version .. no dflt available
- .add_resctrl = &tc_add_resctrl,
-};
-
-/**************************************************************************
- * Helper Functions *
- **************************************************************************/
-
-static inline void
-ckrm_init_task_lock(struct task_struct *tsk)
-{
- tsk->ckrm_tsklock = SPIN_LOCK_UNLOCKED;
-}
-
-// Hubertus .. following functions should move to ckrm_rc.h
-
-static inline void
-ckrm_task_lock(struct task_struct *tsk)
-{
- spin_lock(&tsk->ckrm_tsklock);
-}
-
-static inline void
-ckrm_task_unlock(struct task_struct *tsk)
-{
- spin_unlock(&tsk->ckrm_tsklock);
-}
-
-/*
- * Change the task class of the given task.
- *
- * Change the task's task class to "newcls" if the task's current
- * class (task->taskclass) is same as given "oldcls", if it is non-NULL.
- *
- * Caller is responsible to make sure the task structure stays put through
- * this function.
- *
- * This function should be called with the following locks NOT held
- * - tsk->ckrm_task_lock
- * - core->ckrm_lock, if core is NULL then ckrm_dflt_class.ckrm_lock
- * - tsk->taskclass->ckrm_lock
- *
- * Function is also called with a ckrm_core_grab on the new core, hence
- * it needs to be dropped if no assignment takes place.
- */
-
-static void
-ckrm_set_taskclass(struct task_struct *tsk, ckrm_task_class_t *newcls,
- ckrm_task_class_t *oldcls, enum ckrm_event event)
-{
- int i;
- ckrm_classtype_t *clstype;
- ckrm_res_ctlr_t *rcbs;
- ckrm_task_class_t *curcls;
- void *old_res_class, *new_res_class;
- int drop_old_cls;
-
- ckrm_task_lock(tsk);
- curcls = tsk->taskclass;
-
- // check whether compare_and_exchange should
- if (oldcls && (oldcls != curcls)) {
- ckrm_task_unlock(tsk);
- if (newcls) {
- /* compensate for previous grab */
- TC_DEBUG("(%s:%d): Race-condition caught <%s> %d\n",
- tsk->comm,tsk->pid,class_core(newcls)->name,event);
- ckrm_core_drop(class_core(newcls));
- }
- return;
- }
-
- // make sure we have a real destination core
- if (!newcls) {
- newcls = &taskclass_dflt_class;
- ckrm_core_grab(class_core(newcls));
- }
-
- // take out of old class
- // remember that we need to drop the oldcore
- if ((drop_old_cls = (curcls != NULL))) {
- class_lock(class_core(curcls));
- if (newcls == curcls) {
- // we are already in the destination class.
- // we still need to drop oldcore
- class_unlock(class_core(curcls));
- ckrm_task_unlock(tsk);
- goto out;
- }
- list_del(&tsk->taskclass_link);
- INIT_LIST_HEAD(&tsk->taskclass_link);
- tsk->taskclass = NULL;
- class_unlock(class_core(curcls));
- }
-
- // put into new class
- class_lock(class_core(newcls));
- tsk->taskclass = newcls;
- list_add(&tsk->taskclass_link, &class_core(newcls)->objlist);
- class_unlock(class_core(newcls));
-
- if (newcls == curcls) {
- ckrm_task_unlock(tsk);
- goto out;
- }
-
- CE_NOTIFY(&CT_taskclass,event,newcls,tsk);
-
- ckrm_task_unlock(tsk);
-
- clstype = class_isa(newcls); // Hubertus .. can hardcode ckrm_CT_taskclass
- if (clstype->bit_res_ctlrs) { // avoid running through the entire list if non is registered
- for (i = 0; i < clstype->max_resid; i++) {
- if (clstype->res_ctlrs[i] == NULL)
- continue;
- atomic_inc(&clstype->nr_resusers[i]);
- old_res_class = curcls ? class_core(curcls)->res_class[i] : NULL;
- new_res_class = newcls ? class_core(newcls)->res_class[i] : NULL;
- rcbs = clstype->res_ctlrs[i];
- if (rcbs && rcbs->change_resclass && (old_res_class != new_res_class))
- (*rcbs->change_resclass)(tsk, old_res_class, new_res_class);
- atomic_dec(&clstype->nr_resusers[i]);
- }
- }
-
- out:
- if (drop_old_cls)
- ckrm_core_drop(class_core(curcls));
- return;
-}
-
-// HF SUGGEST: we could macro-tize this for other types DEF_FUNC_ADD_RESCTRL(funcname,link)
-// would DEF_FUNC_ADD_RESCTRL(tc_add_resctrl,taskclass_link)
-
-static void
-tc_add_resctrl(struct ckrm_core_class *core, int resid)
-{
- struct task_struct *tsk;
- struct ckrm_res_ctlr *rcbs;
-
- if ((resid < 0) || (resid >= CKRM_MAX_RES_CTLRS) || ((rcbs = core->classtype->res_ctlrs[resid]) == NULL))
- return;
-
- class_lock(core);
- list_for_each_entry(tsk, &core->objlist, taskclass_link) {
- if (rcbs->change_resclass)
- (*rcbs->change_resclass)(tsk, (void *) -1, core->res_class[resid]);
- }
- class_unlock(core);
-}
-
-
-/**************************************************************************
- * Functions called from classification points *
- **************************************************************************/
-
-#define ECB_PRINTK(fmt, args...) // do { if (CT_taskclass.ce_regd) printk("%s: " fmt, __FUNCTION__ , ## args); } while (0)
-
-#define CE_CLASSIFY_TASK(event, tsk) \
-do { \
- struct ckrm_task_class *newcls = NULL, *oldcls = tsk->taskclass; \
- \
- CE_CLASSIFY_RET(newcls,&CT_taskclass,event,tsk); \
- if (newcls) { \
- /* called synchrously. no need to get task struct */ \
- ckrm_set_taskclass(tsk, newcls, oldcls, event); \
- } \
-} while (0)
-
-#define CE_CLASSIFY_TASK_PROTECT(event, tsk) \
-do { \
- ce_protect(&CT_taskclass); \
- CE_CLASSIFY_TASK(event,tsk); \
- ce_release(&CT_taskclass); \
-} while (0)
-
-
-
-
-static void
-cb_taskclass_newtask(struct task_struct *tsk)
-{
- tsk->taskclass = NULL;
- INIT_LIST_HEAD(&tsk->taskclass_link);
-}
-
-
-static void
-cb_taskclass_fork(struct task_struct *tsk)
-{
- struct ckrm_task_class *cls = NULL;
-
- ECB_PRINTK("%p:%d:%s\n",tsk,tsk->pid,tsk->comm);
-
- ce_protect(&CT_taskclass);
- CE_CLASSIFY_RET(cls,&CT_taskclass,CKRM_EVENT_FORK,tsk);
- if (cls == NULL) {
- ckrm_task_lock(tsk->parent);
- cls = tsk->parent->taskclass;
- ckrm_core_grab(class_core(cls));
- ckrm_task_unlock(tsk->parent);
- }
- if (!list_empty(&tsk->taskclass_link))
- printk("BUG in cb_fork.. tsk (%s:%d> already linked\n",
- tsk->comm,tsk->pid);
-
- ckrm_set_taskclass(tsk, cls, NULL, CKRM_EVENT_FORK);
- ce_release(&CT_taskclass);
-}
-
-static void
-cb_taskclass_exit(struct task_struct *tsk)
-{
- ckrm_task_class_t *cls;
-
- // Remove the task from the current core class
-
- ECB_PRINTK("%p:%d:%s\n",tsk,tsk->pid,tsk->comm);
- ckrm_task_lock(tsk);
-
- CE_CLASSIFY_NORET( &CT_taskclass, CKRM_EVENT_EXIT, tsk);
-
- if ((cls = tsk->taskclass) != NULL) {
- class_lock(class_core(cls));
- tsk->taskclass = NULL;
- list_del(&tsk->taskclass_link);
- class_unlock(class_core(cls));
- ckrm_core_drop(class_core(cls));
- } else {
- INIT_LIST_HEAD(&tsk->taskclass_link);
- }
- ckrm_task_unlock(tsk);
-}
-
-static void
-cb_taskclass_exec(const char *filename)
-{
- ECB_PRINTK("%p:%d:%s <%s>\n",current,current->pid,current->comm,filename);
- CE_CLASSIFY_TASK_PROTECT(CKRM_EVENT_EXEC, current);
-}
-
-static void
-cb_taskclass_uid(void)
-{
- ECB_PRINTK("%p:%d:%s\n",current,current->pid,current->comm);
- CE_CLASSIFY_TASK_PROTECT(CKRM_EVENT_UID, current);
-}
-
-static void
-cb_taskclass_gid(void)
-{
- ECB_PRINTK("%p:%d:%s\n",current,current->pid,current->comm);
- CE_CLASSIFY_TASK_PROTECT(CKRM_EVENT_GID, current);
-}
-
-static struct ckrm_event_spec taskclass_events_callbacks[] = {
- CKRM_EVENT_SPEC( NEWTASK, cb_taskclass_newtask ),
- CKRM_EVENT_SPEC( EXEC , cb_taskclass_exec ),
- CKRM_EVENT_SPEC( FORK , cb_taskclass_fork ),
- CKRM_EVENT_SPEC( EXIT , cb_taskclass_exit ),
- CKRM_EVENT_SPEC( UID , cb_taskclass_uid ),
- CKRM_EVENT_SPEC( GID , cb_taskclass_gid ),
- { -1 }
-};
-
-/***********************************************************************
- *
- * Asynchronous callback functions (driven by RCFS)
- *
- * Async functions force a setting of the task structure
- * synchronous callbacks are protected against race conditions
- * by using a cmpxchg on the core before setting it.
- * Async calls need to be serialized to ensure they can't
- * race against each other
- *
- ***********************************************************************/
-
-DECLARE_MUTEX(async_serializer); // serialize all async functions
-
-
-/*
- * Go through the task list and reclassify all tasks according to the current
- * classification rules.
- *
- * We have the problem that we can not hold any lock (including the
- * tasklist_lock) while classifying. Two methods possible
- *
- * (a) go through entire pidrange (0..pidmax) and if a task exists at
- * that pid then reclassify it
- * (b) go several time through task list and build a bitmap for a particular
- * subrange of pid otherwise the memory requirements ight be too much.
- *
- * We use a hybrid by comparing ratio nr_threads/pidmax
- */
-
-static void
-ckrm_reclassify_all_tasks(void)
-{
- extern int pid_max;
-
- struct task_struct *proc, *thread;
- int i;
- int curpidmax = pid_max;
- int ratio;
- int use_bitmap;
-
-
- ratio = curpidmax / nr_threads;
- if (curpidmax <= PID_MAX_DEFAULT) {
- use_bitmap = 1;
- } else {
- use_bitmap = (ratio >= 2);
- }
-
- ce_protect(&CT_taskclass);
-
- retry:
- if (use_bitmap == 0) {
- // go through it in one walk
- read_lock(&tasklist_lock);
- for ( i=0 ; i<curpidmax ; i++ ) {
- if ((thread = find_task_by_pid(i)) == NULL)
- continue;
- get_task_struct(thread);
- read_unlock(&tasklist_lock);
- CE_CLASSIFY_TASK(CKRM_EVENT_RECLASSIFY, thread);
- put_task_struct(thread);
- read_lock(&tasklist_lock);
- }
- read_unlock(&tasklist_lock);
- } else {
- unsigned long *bitmap;
- int bitmapsize;
- int order = 0;
- int num_loops;
- int pid, do_next;
-
-
- bitmap = (unsigned long*) __get_free_pages(GFP_KERNEL,order);
- if (bitmap == NULL) {
- use_bitmap = 0;
- goto retry;
- }
-
- bitmapsize = 8 * (1 << (order + PAGE_SHIFT));
- num_loops = (curpidmax + bitmapsize - 1) / bitmapsize;
-
- do_next = 1;
- for ( i=0 ; i < num_loops && do_next; i++) {
- int pid_start = i*bitmapsize;
- int pid_end = pid_start + bitmapsize;
- int num_found = 0;
- int pos;
-
- memset(bitmap, 0, bitmapsize/8); // start afresh
- do_next = 0;
-
- read_lock(&tasklist_lock);
- do_each_thread(proc, thread) {
- pid = thread->pid;
- if ((pid < pid_start) || (pid >= pid_end)) {
- if (pid >= pid_end) {
- do_next = 1;
- }
- continue;
- }
- pid -= pid_start;
- set_bit(pid, bitmap);
- num_found++;
- } while_each_thread(proc, thread);
- read_unlock(&tasklist_lock);
-
- if (num_found == 0)
- continue;
-
- pos = 0;
- for ( ; num_found-- ; ) {
- pos = find_next_bit(bitmap, bitmapsize, pos);
- pid = pos + pid_start;
-
- read_lock(&tasklist_lock);
- if ((thread = find_task_by_pid(pid)) != NULL) {
- get_task_struct(thread);
- read_unlock(&tasklist_lock);
- CE_CLASSIFY_TASK(CKRM_EVENT_RECLASSIFY, thread);
- put_task_struct(thread);
- } else {
- read_unlock(&tasklist_lock);
- }
- }
- }
-
- }
- ce_release(&CT_taskclass);
-}
-
-int
-ckrm_reclassify(int pid)
-{
- struct task_struct *tsk;
- int rc = 0;
-
- down(&async_serializer); // protect again race condition
- if (pid < 0) {
- // do we want to treat this as process group .. should YES ToDo
- rc = -EINVAL;
- } else if (pid == 0) {
- // reclassify all tasks in the system
- ckrm_reclassify_all_tasks();
- } else {
- // reclassify particular pid
- read_lock(&tasklist_lock);
- if ((tsk = find_task_by_pid(pid)) != NULL) {
- get_task_struct(tsk);
- read_unlock(&tasklist_lock);
- CE_CLASSIFY_TASK_PROTECT(CKRM_EVENT_RECLASSIFY, tsk);
- put_task_struct(tsk);
- } else {
- read_unlock(&tasklist_lock);
- rc = -EINVAL;
- }
- }
- up(&async_serializer);
- return rc;
-}
-
-/*
- * Reclassify all tasks in the given core class.
- */
-
-static void
-ckrm_reclassify_class_tasks(struct ckrm_task_class *cls)
-{
- int ce_regd;
- struct ckrm_hnode *cnode;
- struct ckrm_task_class *parcls;
- int num = 0;
-
- if (!ckrm_validate_and_grab_core(&cls->core))
- return;
-
- down(&async_serializer); // protect again race condition
-
-
- TC_DEBUG("start %p:%s:%d:%d\n",cls,cls->core.name,
- atomic_read(&cls->core.refcnt),atomic_read(&cls->core.hnode.parent->refcnt));
- // If no CE registered for this classtype, following will be needed repeatedly;
- ce_regd = class_core(cls)->classtype->ce_regd;
- cnode = &(class_core(cls)->hnode);
- parcls = class_type(ckrm_task_class_t, cnode->parent);
-
-next_task:
- class_lock(class_core(cls));
- if (!list_empty(&class_core(cls)->objlist)) {
- struct ckrm_task_class *newcls = NULL;
- struct task_struct *tsk =
- list_entry(class_core(cls)->objlist.next,
- struct task_struct, taskclass_link);
-
- get_task_struct(tsk);
- class_unlock(class_core(cls));
-
- if (ce_regd) {
- CE_CLASSIFY_RET(newcls,&CT_taskclass,CKRM_EVENT_RECLASSIFY,tsk);
- if (cls == newcls) {
- // don't allow reclassifying to the same class
- // as we are in the process of cleaning up this class
- ckrm_core_drop(class_core(newcls)); // to compensate CE's grab
- newcls = NULL;
- }
- }
- if (newcls == NULL) {
- newcls = parcls;
- ckrm_core_grab(class_core(newcls));
- }
- ckrm_set_taskclass(tsk, newcls, cls, CKRM_EVENT_RECLASSIFY);
- put_task_struct(tsk);
- num++;
- goto next_task;
- }
- TC_DEBUG("stop %p:%s:%d:%d %d\n",cls,cls->core.name,
- atomic_read(&cls->core.refcnt),atomic_read(&cls->core.hnode.parent->refcnt),num);
- class_unlock(class_core(cls));
- ckrm_core_drop(class_core(cls));
-
- up(&async_serializer);
-
- return ;
-}
-
-/*
- * Change the core class of the given task.
- */
-
-int
-ckrm_forced_reclassify_pid(pid_t pid, struct ckrm_task_class *cls)
-{
- struct task_struct *tsk;
-
- if (!ckrm_validate_and_grab_core(class_core(cls)))
- return - EINVAL;
-
- read_lock(&tasklist_lock);
- if ((tsk = find_task_by_pid(pid)) == NULL) {
- read_unlock(&tasklist_lock);
- ckrm_core_drop(class_core(cls));
- return -EINVAL;
- }
- get_task_struct(tsk);
- read_unlock(&tasklist_lock);
-
- down(&async_serializer); // protect again race condition
-
- ce_protect(&CT_taskclass);
- ckrm_set_taskclass(tsk, cls, NULL, CKRM_EVENT_MANUAL);
- ce_release(&CT_taskclass);
- put_task_struct(tsk);
-
- up(&async_serializer);
- return 0;
-}
-
-static struct ckrm_core_class *
-ckrm_alloc_task_class(struct ckrm_core_class *parent, const char *name)
-{
- struct ckrm_task_class *taskcls;
- taskcls = kmalloc(sizeof(struct ckrm_task_class), GFP_KERNEL);
- if (taskcls == NULL)
- return NULL;
-
- ckrm_init_core_class(&CT_taskclass,
- class_core(taskcls),parent,name);
-
- ce_protect(&CT_taskclass);
- if (CT_taskclass.ce_cb_active && CT_taskclass.ce_callbacks.class_add)
- (*CT_taskclass.ce_callbacks.class_add)(name,taskcls);
- ce_release(&CT_taskclass);
-
- return class_core(taskcls);
-}
-
-static int
-ckrm_free_task_class(struct ckrm_core_class *core)
-{
- struct ckrm_task_class *taskcls;
-
- if (!ckrm_is_core_valid(core)) {
- // Invalid core
- return (-EINVAL);
- }
- if (core == core->classtype->default_class) {
- // reset the name tag
- core->name = dflt_taskclass_name;
- return 0;
- }
-
- TC_DEBUG("%p:%s:%d\n",core,core->name,atomic_read(&core->refcnt));
-
- taskcls = class_type(struct ckrm_task_class, core);
-
- ce_protect(&CT_taskclass);
-
- if (CT_taskclass.ce_cb_active && CT_taskclass.ce_callbacks.class_delete)
- (*CT_taskclass.ce_callbacks.class_delete)(core->name,taskcls);
- ckrm_reclassify_class_tasks( taskcls );
-
- ce_release(&CT_taskclass);
-
- ckrm_release_core_class(core); // Hubertus .... could just drop the class .. error message
- return 0;
-}
-
-
-void __init
-ckrm_meta_init_taskclass(void)
-{
- printk("...... Initializing ClassType<%s> ........\n",CT_taskclass.name);
- // intialize the default class
- ckrm_init_core_class(&CT_taskclass, class_core(&taskclass_dflt_class),
- NULL,dflt_taskclass_name);
-
- // register classtype and initialize default task class
- ckrm_register_classtype(&CT_taskclass);
- ckrm_register_event_set(taskclass_events_callbacks);
-
- // note registeration of all resource controllers will be done later dynamically
- // as these are specified as modules
-}
-
-
-
-static int
-tc_show_members(struct ckrm_core_class *core, struct seq_file *seq)
-{
- struct list_head *lh;
- struct task_struct *tsk;
-
- class_lock(core);
- list_for_each(lh, &core->objlist) {
- tsk = container_of(lh, struct task_struct, taskclass_link);
- seq_printf(seq,"%ld\n", (long)tsk->pid);
- }
- class_unlock(core);
-
- return 0;
-}
-
-static int
-tc_forced_reclassify(struct ckrm_core_class *target,const char *obj)
-{
- pid_t pid;
- int rc = -EINVAL;
-
- pid = (pid_t) simple_strtoul(obj,NULL,10);
- if (pid > 0) {
- rc = ckrm_forced_reclassify_pid(pid,
- class_type(ckrm_task_class_t,target));
- }
- return rc;
-}
-
-#if 1
-
-/***************************************************************************************
- * Debugging Task Classes: Utility functions
- **************************************************************************************/
-
-void
-check_tasklist_sanity(struct ckrm_task_class *cls)
-{
- struct ckrm_core_class *core = class_core(cls);
- struct list_head *lh1, *lh2;
- int count = 0;
-
- if (core) {
- class_lock(core);
- if (list_empty(&core->objlist)) {
- class_lock(core);
- printk("check_tasklist_sanity: class %s empty list\n",
- core->name);
- return;
- }
- list_for_each_safe(lh1, lh2, &core->objlist) {
- struct task_struct *tsk = container_of(lh1, struct task_struct, taskclass_link);
- if (count++ > 20000) {
- printk("list is CORRUPTED\n");
- break;
- }
- if (tsk->taskclass != cls) {
- const char *tclsname;
- tclsname = (tsk->taskclass) ? class_core(tsk->taskclass)->name
- : "NULL";
- printk("sanity: task %s:%d has ckrm_core |%s| but in list |%s|\n",
- tsk->comm,tsk->pid,tclsname,core->name);
- }
- }
- class_unlock(core);
- }
-}
-
-void
-ckrm_debug_free_task_class(struct ckrm_task_class *tskcls)
-{
- struct task_struct *proc, *thread;
- int count = 0;
-
- printk("Analyze Error <%s> %d\n",
- class_core(tskcls)->name,atomic_read(&(class_core(tskcls)->refcnt)));
-
- read_lock(&tasklist_lock);
- class_lock(class_core(tskcls));
- do_each_thread(proc, thread) {
- count += (tskcls == thread->taskclass);
- if ((thread->taskclass == tskcls) || (tskcls == NULL)) {
- const char *tclsname;
- tclsname = (thread->taskclass) ? class_core(thread->taskclass)->name : "NULL";
- printk("%d thread=<%s:%d> -> <%s> <%lx>\n",
- count,thread->comm,thread->pid,tclsname, thread->flags & PF_EXITING);
- }
- } while_each_thread(proc, thread);
- class_unlock(class_core(tskcls));
- read_unlock(&tasklist_lock);
-
- printk("End Analyze Error <%s> %d\n",
- class_core(tskcls)->name,atomic_read(&(class_core(tskcls)->refcnt)));
-}
-
-#endif
+++ /dev/null
-/* ckrmutils.c - Utility functions for CKRM
- *
- * Copyright (C) Chandra Seetharaman, IBM Corp. 2003
- * (C) Hubertus Franke , IBM Corp. 2004
- *
- * Provides simple utility functions for the core module, CE and resource
- * controllers.
- *
- * Latest version, more details at http://ckrm.sf.net
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-/* Changes
- *
- * 13 Nov 2003
- * Created
- */
-
-#include <linux/mm.h>
-#include <linux/err.h>
-#include <linux/mount.h>
-#include <linux/module.h>
-#include <linux/ckrm_rc.h>
-
-int
-get_exe_path_name(struct task_struct *tsk, char *buf, int buflen)
-{
- struct vm_area_struct * vma;
- struct vfsmount *mnt;
- struct mm_struct * mm = get_task_mm(tsk);
- struct dentry *dentry;
- char *lname;
- int rc = 0;
-
- *buf = '\0';
- if (!mm) {
- return -EINVAL;
- }
-
- down_read(&mm->mmap_sem);
- vma = mm->mmap;
- while (vma) {
- if ((vma->vm_flags & VM_EXECUTABLE) &&
- vma->vm_file) {
- dentry = dget(vma->vm_file->f_dentry);
- mnt = mntget(vma->vm_file->f_vfsmnt);
- lname = d_path(dentry, mnt, buf, buflen);
- if (! IS_ERR(lname)) {
- strncpy(buf, lname, strlen(lname) + 1);
- } else {
- rc = (int) PTR_ERR(lname);
- }
- mntput(mnt);
- dput(dentry);
- break;
- }
- vma = vma->vm_next;
- }
- up_read(&mm->mmap_sem);
- mmput(mm);
- return rc;
-}
-
-
-/*
- * must be called with cnt_lock of parres held
- * Caller is responsible for making sure that the new guarantee doesn't
- * overflow parent's total guarantee.
- */
-void
-child_guarantee_changed(struct ckrm_shares *parent, int cur, int new)
-{
- if (new == cur || !parent) {
- return;
- }
- if (new != CKRM_SHARE_DONTCARE) {
- parent->unused_guarantee -= new;
- }
- if (cur != CKRM_SHARE_DONTCARE) {
- parent->unused_guarantee += cur;
- }
- return;
-}
-
-/*
- * must be called with cnt_lock of parres held
- * Caller is responsible for making sure that the new limit is not more
- * than parent's max_limit
- */
-void
-child_maxlimit_changed(struct ckrm_shares *parent, int new_limit)
-{
- if (parent && parent->cur_max_limit < new_limit) {
- parent->cur_max_limit = new_limit;
- }
- return;
-}
-
-/*
- * Caller is responsible for holding any lock to protect the data
- * structures passed to this function
- */
-int
-set_shares(struct ckrm_shares *new, struct ckrm_shares *cur,
- struct ckrm_shares *par)
-{
- int rc = -EINVAL;
- int cur_usage_guar = cur->total_guarantee - cur->unused_guarantee;
- int increase_by = new->my_guarantee - cur->my_guarantee;
-
- // Check total_guarantee for correctness
- if (new->total_guarantee <= CKRM_SHARE_DONTCARE) {
- goto set_share_err;
- } else if (new->total_guarantee == CKRM_SHARE_UNCHANGED) {
- ;// do nothing
- } else if (cur_usage_guar > new->total_guarantee) {
- goto set_share_err;
- }
-
- // Check max_limit for correctness
- if (new->max_limit <= CKRM_SHARE_DONTCARE) {
- goto set_share_err;
- } else if (new->max_limit == CKRM_SHARE_UNCHANGED) {
- ; // do nothing
- } else if (cur->cur_max_limit > new->max_limit) {
- goto set_share_err;
- }
-
- // Check my_guarantee for correctness
- if (new->my_guarantee == CKRM_SHARE_UNCHANGED) {
- ; // do nothing
- } else if (new->my_guarantee == CKRM_SHARE_DONTCARE) {
- ; // do nothing
- } else if (par && increase_by > par->unused_guarantee) {
- goto set_share_err;
- }
-
- // Check my_limit for correctness
- if (new->my_limit == CKRM_SHARE_UNCHANGED) {
- ; // do nothing
- } else if (new->my_limit == CKRM_SHARE_DONTCARE) {
- ; // do nothing
- } else if (par && new->my_limit > par->max_limit) {
- // I can't get more limit than my parent's limit
- goto set_share_err;
-
- }
-
- // make sure guarantee is lesser than limit
- if (new->my_limit == CKRM_SHARE_DONTCARE) {
- ; // do nothing
- } else if (new->my_limit == CKRM_SHARE_UNCHANGED) {
- if (new->my_guarantee == CKRM_SHARE_DONTCARE) {
- ; // do nothing
- } else if (new->my_guarantee == CKRM_SHARE_UNCHANGED) {
- ; // do nothing earlier setting would 've taken care of it
- } else if (new->my_guarantee > cur->my_limit) {
- goto set_share_err;
- }
- } else { // new->my_limit has a valid value
- if (new->my_guarantee == CKRM_SHARE_DONTCARE) {
- ; // do nothing
- } else if (new->my_guarantee == CKRM_SHARE_UNCHANGED) {
- if (cur->my_guarantee > new->my_limit) {
- goto set_share_err;
- }
- } else if (new->my_guarantee > new->my_limit) {
- goto set_share_err;
- }
- }
-
- if (new->my_guarantee != CKRM_SHARE_UNCHANGED) {
- child_guarantee_changed(par, cur->my_guarantee,
- new->my_guarantee);
- cur->my_guarantee = new->my_guarantee;
- }
-
- if (new->my_limit != CKRM_SHARE_UNCHANGED) {
- child_maxlimit_changed(par, new->my_limit);
- cur->my_limit = new->my_limit;
- }
-
- if (new->total_guarantee != CKRM_SHARE_UNCHANGED) {
- cur->unused_guarantee = new->total_guarantee - cur_usage_guar;
- cur->total_guarantee = new->total_guarantee;
- }
-
- if (new->max_limit != CKRM_SHARE_UNCHANGED) {
- cur->max_limit = new->max_limit;
- }
-
- rc = 0;
-set_share_err:
- return rc;
-}
-
-EXPORT_SYMBOL(get_exe_path_name);
-EXPORT_SYMBOL(child_guarantee_changed);
-EXPORT_SYMBOL(child_maxlimit_changed);
-EXPORT_SYMBOL(set_shares);
-
-
+++ /dev/null
-/*
- * Simple NUMA memory policy for the Linux kernel.
- *
- * Copyright 2003,2004 Andi Kleen, SuSE Labs.
- * Subject to the GNU Public License, version 2.
- *
- * NUMA policy allows the user to give hints in which node(s) memory should
- * be allocated.
- *
- * Support four policies per VMA and per process:
- *
- * The VMA policy has priority over the process policy for a page fault.
- *
- * interleave Allocate memory interleaved over a set of nodes,
- * with normal fallback if it fails.
- * For VMA based allocations this interleaves based on the
- * offset into the backing object or offset into the mapping
- * for anonymous memory. For process policy an process counter
- * is used.
- * bind Only allocate memory on a specific set of nodes,
- * no fallback.
- * preferred Try a specific node first before normal fallback.
- * As a special case node -1 here means do the allocation
- * on the local CPU. This is normally identical to default,
- * but useful to set in a VMA when you have a non default
- * process policy.
- * default Allocate on the local node first, or when on a VMA
- * use the process policy. This is what Linux always did
- * in a NUMA aware kernel and still does by, ahem, default.
- *
- * The process policy is applied for most non interrupt memory allocations
- * in that process' context. Interrupts ignore the policies and always
- * try to allocate on the local CPU. The VMA policy is only applied for memory
- * allocations for a VMA in the VM.
- *
- * Currently there are a few corner cases in swapping where the policy
- * is not applied, but the majority should be handled. When process policy
- * is used it is not remembered over swap outs/swap ins.
- *
- * Only the highest zone in the zone hierarchy gets policied. Allocations
- * requesting a lower zone just use default policy. This implies that
- * on systems with highmem kernel lowmem allocation don't get policied.
- * Same with GFP_DMA allocations.
- *
- * For shmfs/tmpfs/hugetlbfs shared memory the policy is shared between
- * all users and remembered even when nobody has memory mapped.
- */
-
-/* Notebook:
- fix mmap readahead to honour policy and enable policy for any page cache
- object
- statistics for bigpages
- global policy for page cache? currently it uses process policy. Requires
- first item above.
- handle mremap for shared memory (currently ignored for the policy)
- grows down?
- make bind policy root only? It can trigger oom much faster and the
- kernel is not always grateful with that.
- could replace all the switch()es with a mempolicy_ops structure.
-*/
-
-#include <linux/mempolicy.h>
-#include <linux/mm.h>
-#include <linux/hugetlb.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/gfp.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/compat.h>
-#include <linux/mempolicy.h>
-#include <asm/uaccess.h>
-
-static kmem_cache_t *policy_cache;
-static kmem_cache_t *sn_cache;
-
-#define PDprintk(fmt...)
-
-/* Highest zone. An specific allocation for a zone below that is not
- policied. */
-static int policy_zone;
-
-static struct mempolicy default_policy = {
- .refcnt = ATOMIC_INIT(1), /* never free it */
- .policy = MPOL_DEFAULT,
-};
-
-/* Check if all specified nodes are online */
-static int nodes_online(unsigned long *nodes)
-{
- DECLARE_BITMAP(offline, MAX_NUMNODES);
-
- bitmap_copy(offline, node_online_map, MAX_NUMNODES);
- if (bitmap_empty(offline, MAX_NUMNODES))
- set_bit(0, offline);
- bitmap_complement(offline, MAX_NUMNODES);
- bitmap_and(offline, offline, nodes, MAX_NUMNODES);
- if (!bitmap_empty(offline, MAX_NUMNODES))
- return -EINVAL;
- return 0;
-}
-
-/* Do sanity checking on a policy */
-static int mpol_check_policy(int mode, unsigned long *nodes)
-{
- int empty = bitmap_empty(nodes, MAX_NUMNODES);
-
- switch (mode) {
- case MPOL_DEFAULT:
- if (!empty)
- return -EINVAL;
- break;
- case MPOL_BIND:
- case MPOL_INTERLEAVE:
- /* Preferred will only use the first bit, but allow
- more for now. */
- if (empty)
- return -EINVAL;
- break;
- }
- return nodes_online(nodes);
-}
-
-/* Copy a node mask from user space. */
-static int get_nodes(unsigned long *nodes, unsigned long __user *nmask,
- unsigned long maxnode, int mode)
-{
- unsigned long k;
- unsigned long nlongs;
- unsigned long endmask;
-
- --maxnode;
- nlongs = BITS_TO_LONGS(maxnode);
- if ((maxnode % BITS_PER_LONG) == 0)
- endmask = ~0UL;
- else
- endmask = (1UL << (maxnode % BITS_PER_LONG)) - 1;
-
- /* When the user specified more nodes than supported just check
- if the non supported part is all zero. */
- if (nmask && nlongs > BITS_TO_LONGS(MAX_NUMNODES)) {
- for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) {
- unsigned long t;
- if (get_user(t, nmask + k))
- return -EFAULT;
- if (k == nlongs - 1) {
- if (t & endmask)
- return -EINVAL;
- } else if (t)
- return -EINVAL;
- }
- nlongs = BITS_TO_LONGS(MAX_NUMNODES);
- endmask = ~0UL;
- }
-
- bitmap_zero(nodes, MAX_NUMNODES);
- if (nmask && copy_from_user(nodes, nmask, nlongs*sizeof(unsigned long)))
- return -EFAULT;
- nodes[nlongs-1] &= endmask;
- return mpol_check_policy(mode, nodes);
-}
-
-/* Generate a custom zonelist for the BIND policy. */
-static struct zonelist *bind_zonelist(unsigned long *nodes)
-{
- struct zonelist *zl;
- int num, max, nd;
-
- max = 1 + MAX_NR_ZONES * bitmap_weight(nodes, MAX_NUMNODES);
- zl = kmalloc(sizeof(void *) * max, GFP_KERNEL);
- if (!zl)
- return NULL;
- num = 0;
- for (nd = find_first_bit(nodes, MAX_NUMNODES);
- nd < MAX_NUMNODES;
- nd = find_next_bit(nodes, MAX_NUMNODES, 1+nd)) {
- int k;
- for (k = MAX_NR_ZONES-1; k >= 0; k--) {
- struct zone *z = &NODE_DATA(nd)->node_zones[k];
- if (!z->present_pages)
- continue;
- zl->zones[num++] = z;
- if (k > policy_zone)
- policy_zone = k;
- }
- }
- BUG_ON(num >= max);
- zl->zones[num] = NULL;
- return zl;
-}
-
-/* Create a new policy */
-static struct mempolicy *mpol_new(int mode, unsigned long *nodes)
-{
- struct mempolicy *policy;
-
- PDprintk("setting mode %d nodes[0] %lx\n", mode, nodes[0]);
- if (mode == MPOL_DEFAULT)
- return NULL;
- policy = kmem_cache_alloc(policy_cache, GFP_KERNEL);
- if (!policy)
- return ERR_PTR(-ENOMEM);
- atomic_set(&policy->refcnt, 1);
- switch (mode) {
- case MPOL_INTERLEAVE:
- bitmap_copy(policy->v.nodes, nodes, MAX_NUMNODES);
- break;
- case MPOL_PREFERRED:
- policy->v.preferred_node = find_first_bit(nodes, MAX_NUMNODES);
- if (policy->v.preferred_node >= MAX_NUMNODES)
- policy->v.preferred_node = -1;
- break;
- case MPOL_BIND:
- policy->v.zonelist = bind_zonelist(nodes);
- if (policy->v.zonelist == NULL) {
- kmem_cache_free(policy_cache, policy);
- return ERR_PTR(-ENOMEM);
- }
- break;
- }
- policy->policy = mode;
- return policy;
-}
-
-/* Ensure all existing pages follow the policy. */
-static int
-verify_pages(unsigned long addr, unsigned long end, unsigned long *nodes)
-{
- while (addr < end) {
- struct page *p;
- pte_t *pte;
- pmd_t *pmd;
- pgd_t *pgd = pgd_offset_k(addr);
- if (pgd_none(*pgd)) {
- addr = (addr + PGDIR_SIZE) & PGDIR_MASK;
- continue;
- }
- pmd = pmd_offset(pgd, addr);
- if (pmd_none(*pmd)) {
- addr = (addr + PMD_SIZE) & PMD_MASK;
- continue;
- }
- p = NULL;
- pte = pte_offset_map(pmd, addr);
- if (pte_present(*pte))
- p = pte_page(*pte);
- pte_unmap(pte);
- if (p) {
- unsigned nid = page_to_nid(p);
- if (!test_bit(nid, nodes))
- return -EIO;
- }
- addr += PAGE_SIZE;
- }
- return 0;
-}
-
-/* Step 1: check the range */
-static struct vm_area_struct *
-check_range(struct mm_struct *mm, unsigned long start, unsigned long end,
- unsigned long *nodes, unsigned long flags)
-{
- int err;
- struct vm_area_struct *first, *vma, *prev;
-
- first = find_vma(mm, start);
- if (!first)
- return ERR_PTR(-EFAULT);
- prev = NULL;
- for (vma = first; vma && vma->vm_start < end; vma = vma->vm_next) {
- if (!vma->vm_next && vma->vm_end < end)
- return ERR_PTR(-EFAULT);
- if (prev && prev->vm_end < vma->vm_start)
- return ERR_PTR(-EFAULT);
- if ((flags & MPOL_MF_STRICT) && !is_vm_hugetlb_page(vma)) {
- err = verify_pages(vma->vm_start, vma->vm_end, nodes);
- if (err) {
- first = ERR_PTR(err);
- break;
- }
- }
- prev = vma;
- }
- return first;
-}
-
-/* Apply policy to a single VMA */
-static int policy_vma(struct vm_area_struct *vma, struct mempolicy *new)
-{
- int err = 0;
- struct mempolicy *old = vma->vm_policy;
-
- PDprintk("vma %lx-%lx/%lx vm_ops %p vm_file %p set_policy %p\n",
- vma->vm_start, vma->vm_end, vma->vm_pgoff,
- vma->vm_ops, vma->vm_file,
- vma->vm_ops ? vma->vm_ops->set_policy : NULL);
-
- if (vma->vm_ops && vma->vm_ops->set_policy)
- err = vma->vm_ops->set_policy(vma, new);
- if (!err) {
- mpol_get(new);
- vma->vm_policy = new;
- mpol_free(old);
- }
- return err;
-}
-
-/* Step 2: apply policy to a range and do splits. */
-static int mbind_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end, struct mempolicy *new)
-{
- struct vm_area_struct *next;
- int err;
-
- err = 0;
- for (; vma && vma->vm_start < end; vma = next) {
- next = vma->vm_next;
- if (vma->vm_start < start)
- err = split_vma(vma->vm_mm, vma, start, 1);
- if (!err && vma->vm_end > end)
- err = split_vma(vma->vm_mm, vma, end, 0);
- if (!err)
- err = policy_vma(vma, new);
- if (err)
- break;
- }
- return err;
-}
-
-/* Change policy for a memory range */
-asmlinkage long sys_mbind(unsigned long start, unsigned long len,
- unsigned long mode,
- unsigned long __user *nmask, unsigned long maxnode,
- unsigned flags)
-{
- struct vm_area_struct *vma;
- struct mm_struct *mm = current->mm;
- struct mempolicy *new;
- unsigned long end;
- DECLARE_BITMAP(nodes, MAX_NUMNODES);
- int err;
-
- if ((flags & ~(unsigned long)(MPOL_MF_STRICT)) || mode > MPOL_MAX)
- return -EINVAL;
- if (start & ~PAGE_MASK)
- return -EINVAL;
- if (mode == MPOL_DEFAULT)
- flags &= ~MPOL_MF_STRICT;
- len = (len + PAGE_SIZE - 1) & PAGE_MASK;
- end = start + len;
- if (end < start)
- return -EINVAL;
- if (end == start)
- return 0;
-
- err = get_nodes(nodes, nmask, maxnode, mode);
- if (err)
- return err;
-
- new = mpol_new(mode, nodes);
- if (IS_ERR(new))
- return PTR_ERR(new);
-
- PDprintk("mbind %lx-%lx mode:%ld nodes:%lx\n",start,start+len,
- mode,nodes[0]);
-
- down_write(&mm->mmap_sem);
- vma = check_range(mm, start, end, nodes, flags);
- err = PTR_ERR(vma);
- if (!IS_ERR(vma))
- err = mbind_range(vma, start, end, new);
- up_write(&mm->mmap_sem);
- mpol_free(new);
- return err;
-}
-
-/* Set the process memory policy */
-asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask,
- unsigned long maxnode)
-{
- int err;
- struct mempolicy *new;
- DECLARE_BITMAP(nodes, MAX_NUMNODES);
-
- if (mode > MPOL_MAX)
- return -EINVAL;
- err = get_nodes(nodes, nmask, maxnode, mode);
- if (err)
- return err;
- new = mpol_new(mode, nodes);
- if (IS_ERR(new))
- return PTR_ERR(new);
- mpol_free(current->mempolicy);
- current->mempolicy = new;
- if (new && new->policy == MPOL_INTERLEAVE)
- current->il_next = find_first_bit(new->v.nodes, MAX_NUMNODES);
- return 0;
-}
-
-/* Fill a zone bitmap for a policy */
-static void get_zonemask(struct mempolicy *p, unsigned long *nodes)
-{
- int i;
-
- bitmap_zero(nodes, MAX_NUMNODES);
- switch (p->policy) {
- case MPOL_BIND:
- for (i = 0; p->v.zonelist->zones[i]; i++)
- __set_bit(p->v.zonelist->zones[i]->zone_pgdat->node_id, nodes);
- break;
- case MPOL_DEFAULT:
- break;
- case MPOL_INTERLEAVE:
- bitmap_copy(nodes, p->v.nodes, MAX_NUMNODES);
- break;
- case MPOL_PREFERRED:
- /* or use current node instead of online map? */
- if (p->v.preferred_node < 0)
- bitmap_copy(nodes, node_online_map, MAX_NUMNODES);
- else
- __set_bit(p->v.preferred_node, nodes);
- break;
- default:
- BUG();
- }
-}
-
-static int lookup_node(struct mm_struct *mm, unsigned long addr)
-{
- struct page *p;
- int err;
-
- err = get_user_pages(current, mm, addr & PAGE_MASK, 1, 0, 0, &p, NULL);
- if (err >= 0) {
- err = page_zone(p)->zone_pgdat->node_id;
- put_page(p);
- }
- return err;
-}
-
-/* Copy a kernel node mask to user space */
-static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode,
- void *nodes, unsigned nbytes)
-{
- unsigned long copy = ALIGN(maxnode-1, 64) / 8;
-
- if (copy > nbytes) {
- if (copy > PAGE_SIZE)
- return -EINVAL;
- if (clear_user((char __user *)mask + nbytes, copy - nbytes))
- return -EFAULT;
- copy = nbytes;
- }
- return copy_to_user(mask, nodes, copy) ? -EFAULT : 0;
-}
-
-/* Retrieve NUMA policy */
-asmlinkage long sys_get_mempolicy(int __user *policy,
- unsigned long __user *nmask,
- unsigned long maxnode,
- unsigned long addr, unsigned long flags)
-{
- int err, pval;
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma = NULL;
- struct mempolicy *pol = current->mempolicy;
-
- if (flags & ~(unsigned long)(MPOL_F_NODE|MPOL_F_ADDR))
- return -EINVAL;
- if (nmask != NULL && maxnode < numnodes)
- return -EINVAL;
- if (flags & MPOL_F_ADDR) {
- down_read(&mm->mmap_sem);
- vma = find_vma_intersection(mm, addr, addr+1);
- if (!vma) {
- up_read(&mm->mmap_sem);
- return -EFAULT;
- }
- if (vma->vm_ops && vma->vm_ops->get_policy)
- pol = vma->vm_ops->get_policy(vma, addr);
- else
- pol = vma->vm_policy;
- } else if (addr)
- return -EINVAL;
-
- if (!pol)
- pol = &default_policy;
-
- if (flags & MPOL_F_NODE) {
- if (flags & MPOL_F_ADDR) {
- err = lookup_node(mm, addr);
- if (err < 0)
- goto out;
- pval = err;
- } else if (pol == current->mempolicy &&
- pol->policy == MPOL_INTERLEAVE) {
- pval = current->il_next;
- } else {
- err = -EINVAL;
- goto out;
- }
- } else
- pval = pol->policy;
-
- err = -EFAULT;
- if (policy && put_user(pval, policy))
- goto out;
-
- err = 0;
- if (nmask) {
- DECLARE_BITMAP(nodes, MAX_NUMNODES);
- get_zonemask(pol, nodes);
- err = copy_nodes_to_user(nmask, maxnode, nodes, sizeof(nodes));
- }
-
- out:
- if (vma)
- up_read(¤t->mm->mmap_sem);
- return err;
-}
-
-#ifdef CONFIG_COMPAT
-/* The other functions are compatible */
-asmlinkage long compat_get_mempolicy(int __user *policy,
- unsigned __user *nmask, unsigned maxnode,
- unsigned addr, unsigned flags)
-{
- long err;
- unsigned long __user *nm = NULL;
- if (nmask)
- nm = compat_alloc_user_space(ALIGN(maxnode-1, 64) / 8);
- err = sys_get_mempolicy(policy, nm, maxnode, addr, flags);
- if (!err && copy_in_user(nmask, nm, ALIGN(maxnode-1, 32)/8))
- err = -EFAULT;
- return err;
-}
-#endif
-
-/* Return effective policy for a VMA */
-static struct mempolicy *
-get_vma_policy(struct vm_area_struct *vma, unsigned long addr)
-{
- struct mempolicy *pol = current->mempolicy;
-
- if (vma) {
- if (vma->vm_ops && vma->vm_ops->get_policy)
- pol = vma->vm_ops->get_policy(vma, addr);
- else if (vma->vm_policy &&
- vma->vm_policy->policy != MPOL_DEFAULT)
- pol = vma->vm_policy;
- }
- if (!pol)
- pol = &default_policy;
- return pol;
-}
-
-/* Return a zonelist representing a mempolicy */
-static struct zonelist *zonelist_policy(unsigned gfp, struct mempolicy *policy)
-{
- int nd;
-
- switch (policy->policy) {
- case MPOL_PREFERRED:
- nd = policy->v.preferred_node;
- if (nd < 0)
- nd = numa_node_id();
- break;
- case MPOL_BIND:
- /* Lower zones don't get a policy applied */
- if (gfp >= policy_zone)
- return policy->v.zonelist;
- /*FALL THROUGH*/
- case MPOL_INTERLEAVE: /* should not happen */
- case MPOL_DEFAULT:
- nd = numa_node_id();
- break;
- default:
- nd = 0;
- BUG();
- }
- return NODE_DATA(nd)->node_zonelists + (gfp & GFP_ZONEMASK);
-}
-
-/* Do dynamic interleaving for a process */
-static unsigned interleave_nodes(struct mempolicy *policy)
-{
- unsigned nid, next;
- struct task_struct *me = current;
-
- nid = me->il_next;
- BUG_ON(nid >= MAX_NUMNODES);
- next = find_next_bit(policy->v.nodes, MAX_NUMNODES, 1+nid);
- if (next >= MAX_NUMNODES)
- next = find_first_bit(policy->v.nodes, MAX_NUMNODES);
- me->il_next = next;
- return nid;
-}
-
-/* Do static interleaving for a VMA with known offset. */
-static unsigned offset_il_node(struct mempolicy *pol,
- struct vm_area_struct *vma, unsigned long off)
-{
- unsigned nnodes = bitmap_weight(pol->v.nodes, MAX_NUMNODES);
- unsigned target = (unsigned)off % nnodes;
- int c;
- int nid = -1;
-
- c = 0;
- do {
- nid = find_next_bit(pol->v.nodes, MAX_NUMNODES, nid+1);
- c++;
- } while (c <= target);
- BUG_ON(nid >= MAX_NUMNODES);
- BUG_ON(!test_bit(nid, pol->v.nodes));
- return nid;
-}
-
-/* Allocate a page in interleaved policy.
- Own path because it needs to do special accounting. */
-static struct page *alloc_page_interleave(unsigned gfp, unsigned nid)
-{
- struct zonelist *zl;
- struct page *page;
-
- BUG_ON(!test_bit(nid, node_online_map));
- zl = NODE_DATA(nid)->node_zonelists + (gfp & GFP_ZONEMASK);
- page = __alloc_pages(gfp, 0, zl);
- if (page && page_zone(page) == zl->zones[0]) {
- zl->zones[0]->pageset[get_cpu()].interleave_hit++;
- put_cpu();
- }
- return page;
-}
-
-/**
- * alloc_page_vma - Allocate a page for a VMA.
- *
- * @gfp:
- * %GFP_USER user allocation.
- * %GFP_KERNEL kernel allocations,
- * %GFP_HIGHMEM highmem/user allocations,
- * %GFP_FS allocation should not call back into a file system.
- * %GFP_ATOMIC don't sleep.
- *
- * @vma: Pointer to VMA or NULL if not available.
- * @addr: Virtual Address of the allocation. Must be inside the VMA.
- *
- * This function allocates a page from the kernel page pool and applies
- * a NUMA policy associated with the VMA or the current process.
- * When VMA is not NULL caller must hold down_read on the mmap_sem of the
- * mm_struct of the VMA to prevent it from going away. Should be used for
- * all allocations for pages that will be mapped into
- * user space. Returns NULL when no page can be allocated.
- *
- * Should be called with the mm_sem of the vma hold.
- */
-struct page *
-alloc_page_vma(unsigned gfp, struct vm_area_struct *vma, unsigned long addr)
-{
- struct mempolicy *pol = get_vma_policy(vma, addr);
-
- if (unlikely(pol->policy == MPOL_INTERLEAVE)) {
- unsigned nid;
- if (vma) {
- unsigned long off;
- BUG_ON(addr >= vma->vm_end);
- BUG_ON(addr < vma->vm_start);
- off = vma->vm_pgoff;
- off += (addr - vma->vm_start) >> PAGE_SHIFT;
- nid = offset_il_node(pol, vma, off);
- } else {
- /* fall back to process interleaving */
- nid = interleave_nodes(pol);
- }
- return alloc_page_interleave(gfp, nid);
- }
- return __alloc_pages(gfp, 0, zonelist_policy(gfp, pol));
-}
-
-/**
- * alloc_pages_current - Allocate pages.
- *
- * @gfp:
- * %GFP_USER user allocation,
- * %GFP_KERNEL kernel allocation,
- * %GFP_HIGHMEM highmem allocation,
- * %GFP_FS don't call back into a file system.
- * %GFP_ATOMIC don't sleep.
- * @order: Power of two of allocation size in pages. 0 is a single page.
- *
- * Allocate a page from the kernel page pool. When not in
- * interrupt context and apply the current process NUMA policy.
- * Returns NULL when no page can be allocated.
- */
-struct page *alloc_pages_current(unsigned gfp, unsigned order)
-{
- struct mempolicy *pol = current->mempolicy;
-
- if (!pol || in_interrupt())
- pol = &default_policy;
- if (pol->policy == MPOL_INTERLEAVE && order == 0)
- return alloc_page_interleave(gfp, interleave_nodes(pol));
- return __alloc_pages(gfp, order, zonelist_policy(gfp, pol));
-}
-EXPORT_SYMBOL(alloc_pages_current);
-
-/* Slow path of a mempolicy copy */
-struct mempolicy *__mpol_copy(struct mempolicy *old)
-{
- struct mempolicy *new = kmem_cache_alloc(policy_cache, GFP_KERNEL);
-
- if (!new)
- return ERR_PTR(-ENOMEM);
- *new = *old;
- atomic_set(&new->refcnt, 1);
- if (new->policy == MPOL_BIND) {
- int sz = ksize(old->v.zonelist);
- new->v.zonelist = kmalloc(sz, SLAB_KERNEL);
- if (!new->v.zonelist) {
- kmem_cache_free(policy_cache, new);
- return ERR_PTR(-ENOMEM);
- }
- memcpy(new->v.zonelist, old->v.zonelist, sz);
- }
- return new;
-}
-
-/* Slow path of a mempolicy comparison */
-int __mpol_equal(struct mempolicy *a, struct mempolicy *b)
-{
- if (!a || !b)
- return 0;
- if (a->policy != b->policy)
- return 0;
- switch (a->policy) {
- case MPOL_DEFAULT:
- return 1;
- case MPOL_INTERLEAVE:
- return bitmap_equal(a->v.nodes, b->v.nodes, MAX_NUMNODES);
- case MPOL_PREFERRED:
- return a->v.preferred_node == b->v.preferred_node;
- case MPOL_BIND: {
- int i;
- for (i = 0; a->v.zonelist->zones[i]; i++)
- if (a->v.zonelist->zones[i] != b->v.zonelist->zones[i])
- return 0;
- return b->v.zonelist->zones[i] == NULL;
- }
- default:
- BUG();
- return 0;
- }
-}
-
-/* Slow path of a mpol destructor. */
-void __mpol_free(struct mempolicy *p)
-{
- if (!atomic_dec_and_test(&p->refcnt))
- return;
- if (p->policy == MPOL_BIND)
- kfree(p->v.zonelist);
- p->policy = MPOL_DEFAULT;
- kmem_cache_free(policy_cache, p);
-}
-
-/*
- * Hugetlb policy. Same as above, just works with node numbers instead of
- * zonelists.
- */
-
-/* Find first node suitable for an allocation */
-int mpol_first_node(struct vm_area_struct *vma, unsigned long addr)
-{
- struct mempolicy *pol = get_vma_policy(vma, addr);
-
- switch (pol->policy) {
- case MPOL_DEFAULT:
- return numa_node_id();
- case MPOL_BIND:
- return pol->v.zonelist->zones[0]->zone_pgdat->node_id;
- case MPOL_INTERLEAVE:
- return interleave_nodes(pol);
- case MPOL_PREFERRED:
- return pol->v.preferred_node >= 0 ?
- pol->v.preferred_node : numa_node_id();
- }
- BUG();
- return 0;
-}
-
-/* Find secondary valid nodes for an allocation */
-int mpol_node_valid(int nid, struct vm_area_struct *vma, unsigned long addr)
-{
- struct mempolicy *pol = get_vma_policy(vma, addr);
-
- switch (pol->policy) {
- case MPOL_PREFERRED:
- case MPOL_DEFAULT:
- case MPOL_INTERLEAVE:
- return 1;
- case MPOL_BIND: {
- struct zone **z;
- for (z = pol->v.zonelist->zones; *z; z++)
- if ((*z)->zone_pgdat->node_id == nid)
- return 1;
- return 0;
- }
- default:
- BUG();
- return 0;
- }
-}
-
-/*
- * Shared memory backing store policy support.
- *
- * Remember policies even when nobody has shared memory mapped.
- * The policies are kept in Red-Black tree linked from the inode.
- * They are protected by the sp->sem semaphore, which should be held
- * for any accesses to the tree.
- */
-
-/* lookup first element intersecting start-end */
-/* Caller holds sp->sem */
-static struct sp_node *
-sp_lookup(struct shared_policy *sp, unsigned long start, unsigned long end)
-{
- struct rb_node *n = sp->root.rb_node;
-
- while (n) {
- struct sp_node *p = rb_entry(n, struct sp_node, nd);
- if (start >= p->end) {
- n = n->rb_right;
- } else if (end < p->start) {
- n = n->rb_left;
- } else {
- break;
- }
- }
- if (!n)
- return NULL;
- for (;;) {
- struct sp_node *w = NULL;
- struct rb_node *prev = rb_prev(n);
- if (!prev)
- break;
- w = rb_entry(prev, struct sp_node, nd);
- if (w->end <= start)
- break;
- n = prev;
- }
- return rb_entry(n, struct sp_node, nd);
-}
-
-/* Insert a new shared policy into the list. */
-/* Caller holds sp->sem */
-static void sp_insert(struct shared_policy *sp, struct sp_node *new)
-{
- struct rb_node **p = &sp->root.rb_node;
- struct rb_node *parent = NULL;
- struct sp_node *nd;
-
- while (*p) {
- parent = *p;
- nd = rb_entry(parent, struct sp_node, nd);
- if (new->start < nd->start)
- p = &(*p)->rb_left;
- else if (new->end > nd->end)
- p = &(*p)->rb_right;
- else
- BUG();
- }
- rb_link_node(&new->nd, parent, p);
- rb_insert_color(&new->nd, &sp->root);
- PDprintk("inserting %lx-%lx: %d\n", new->start, new->end,
- new->policy ? new->policy->policy : 0);
-}
-
-/* Find shared policy intersecting idx */
-struct mempolicy *
-mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx)
-{
- struct mempolicy *pol = NULL;
- struct sp_node *sn;
-
- down(&sp->sem);
- sn = sp_lookup(sp, idx, idx+1);
- if (sn) {
- mpol_get(sn->policy);
- pol = sn->policy;
- }
- up(&sp->sem);
- return pol;
-}
-
-static void sp_delete(struct shared_policy *sp, struct sp_node *n)
-{
- PDprintk("deleting %lx-l%x\n", n->start, n->end);
- rb_erase(&n->nd, &sp->root);
- mpol_free(n->policy);
- kmem_cache_free(sn_cache, n);
-}
-
-struct sp_node *
-sp_alloc(unsigned long start, unsigned long end, struct mempolicy *pol)
-{
- struct sp_node *n = kmem_cache_alloc(sn_cache, GFP_KERNEL);
-
- if (!n)
- return NULL;
- n->start = start;
- n->end = end;
- mpol_get(pol);
- n->policy = pol;
- return n;
-}
-
-/* Replace a policy range. */
-static int shared_policy_replace(struct shared_policy *sp, unsigned long start,
- unsigned long end, struct sp_node *new)
-{
- struct sp_node *n, *new2;
-
- down(&sp->sem);
- n = sp_lookup(sp, start, end);
- /* Take care of old policies in the same range. */
- while (n && n->start < end) {
- struct rb_node *next = rb_next(&n->nd);
- if (n->start >= start) {
- if (n->end <= end)
- sp_delete(sp, n);
- else
- n->start = end;
- } else {
- /* Old policy spanning whole new range. */
- if (n->end > end) {
- new2 = sp_alloc(end, n->end, n->policy);
- if (!new2) {
- up(&sp->sem);
- return -ENOMEM;
- }
- n->end = end;
- sp_insert(sp, new2);
- }
- /* Old crossing beginning, but not end (easy) */
- if (n->start < start && n->end > start)
- n->end = start;
- }
- if (!next)
- break;
- n = rb_entry(next, struct sp_node, nd);
- }
- if (new)
- sp_insert(sp, new);
- up(&sp->sem);
- return 0;
-}
-
-int mpol_set_shared_policy(struct shared_policy *info,
- struct vm_area_struct *vma, struct mempolicy *npol)
-{
- int err;
- struct sp_node *new = NULL;
- unsigned long sz = vma_pages(vma);
-
- PDprintk("set_shared_policy %lx sz %lu %d %lx\n",
- vma->vm_pgoff,
- sz, npol? npol->policy : -1,
- npol ? npol->v.nodes[0] : -1);
-
- if (npol) {
- new = sp_alloc(vma->vm_pgoff, vma->vm_pgoff + sz, npol);
- if (!new)
- return -ENOMEM;
- }
- err = shared_policy_replace(info, vma->vm_pgoff, vma->vm_pgoff+sz, new);
- if (err && new)
- kmem_cache_free(sn_cache, new);
- return err;
-}
-
-/* Free a backing policy store on inode delete. */
-void mpol_free_shared_policy(struct shared_policy *p)
-{
- struct sp_node *n;
- struct rb_node *next;
-
- down(&p->sem);
- next = rb_first(&p->root);
- while (next) {
- n = rb_entry(next, struct sp_node, nd);
- next = rb_next(&n->nd);
- rb_erase(&n->nd, &p->root);
- mpol_free(n->policy);
- kmem_cache_free(sn_cache, n);
- }
- up(&p->sem);
-}
-
-static __init int numa_policy_init(void)
-{
- policy_cache = kmem_cache_create("numa_policy",
- sizeof(struct mempolicy),
- 0, SLAB_PANIC, NULL, NULL);
-
- sn_cache = kmem_cache_create("shared_policy_node",
- sizeof(struct sp_node),
- 0, SLAB_PANIC, NULL, NULL);
- return 0;
-}
-module_init(numa_policy_init);
+++ /dev/null
-/*
- * mm/prio_tree.c - priority search tree for mapping->i_mmap
- *
- * Copyright (C) 2004, Rajesh Venkatasubramanian <vrajesh@umich.edu>
- *
- * This file is released under the GPL v2.
- *
- * Based on the radix priority search tree proposed by Edward M. McCreight
- * SIAM Journal of Computing, vol. 14, no.2, pages 257-276, May 1985
- *
- * 02Feb2004 Initial version
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/prio_tree.h>
-
-/*
- * A clever mix of heap and radix trees forms a radix priority search tree (PST)
- * which is useful for storing intervals, e.g, we can consider a vma as a closed
- * interval of file pages [offset_begin, offset_end], and store all vmas that
- * map a file in a PST. Then, using the PST, we can answer a stabbing query,
- * i.e., selecting a set of stored intervals (vmas) that overlap with (map) a
- * given input interval X (a set of consecutive file pages), in "O(log n + m)"
- * time where 'log n' is the height of the PST, and 'm' is the number of stored
- * intervals (vmas) that overlap (map) with the input interval X (the set of
- * consecutive file pages).
- *
- * In our implementation, we store closed intervals of the form [radix_index,
- * heap_index]. We assume that always radix_index <= heap_index. McCreight's PST
- * is designed for storing intervals with unique radix indices, i.e., each
- * interval have different radix_index. However, this limitation can be easily
- * overcome by using the size, i.e., heap_index - radix_index, as part of the
- * index, so we index the tree using [(radix_index,size), heap_index].
- *
- * When the above-mentioned indexing scheme is used, theoretically, in a 32 bit
- * machine, the maximum height of a PST can be 64. We can use a balanced version
- * of the priority search tree to optimize the tree height, but the balanced
- * tree proposed by McCreight is too complex and memory-hungry for our purpose.
- */
-
-/*
- * The following macros are used for implementing prio_tree for i_mmap
- */
-
-#define RADIX_INDEX(vma) ((vma)->vm_pgoff)
-#define VMA_SIZE(vma) (((vma)->vm_end - (vma)->vm_start) >> PAGE_SHIFT)
-/* avoid overflow */
-#define HEAP_INDEX(vma) ((vma)->vm_pgoff + (VMA_SIZE(vma) - 1))
-
-#define GET_INDEX_VMA(vma, radix, heap) \
-do { \
- radix = RADIX_INDEX(vma); \
- heap = HEAP_INDEX(vma); \
-} while (0)
-
-#define GET_INDEX(node, radix, heap) \
-do { \
- struct vm_area_struct *__tmp = \
- prio_tree_entry(node, struct vm_area_struct, shared.prio_tree_node);\
- GET_INDEX_VMA(__tmp, radix, heap); \
-} while (0)
-
-static unsigned long index_bits_to_maxindex[BITS_PER_LONG];
-
-void __init prio_tree_init(void)
-{
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(index_bits_to_maxindex) - 1; i++)
- index_bits_to_maxindex[i] = (1UL << (i + 1)) - 1;
- index_bits_to_maxindex[ARRAY_SIZE(index_bits_to_maxindex) - 1] = ~0UL;
-}
-
-/*
- * Maximum heap_index that can be stored in a PST with index_bits bits
- */
-static inline unsigned long prio_tree_maxindex(unsigned int bits)
-{
- return index_bits_to_maxindex[bits - 1];
-}
-
-/*
- * Extend a priority search tree so that it can store a node with heap_index
- * max_heap_index. In the worst case, this algorithm takes O((log n)^2).
- * However, this function is used rarely and the common case performance is
- * not bad.
- */
-static struct prio_tree_node *prio_tree_expand(struct prio_tree_root *root,
- struct prio_tree_node *node, unsigned long max_heap_index)
-{
- static void prio_tree_remove(struct prio_tree_root *,
- struct prio_tree_node *);
- struct prio_tree_node *first = NULL, *prev, *last = NULL;
-
- if (max_heap_index > prio_tree_maxindex(root->index_bits))
- root->index_bits++;
-
- while (max_heap_index > prio_tree_maxindex(root->index_bits)) {
- root->index_bits++;
-
- if (prio_tree_empty(root))
- continue;
-
- if (first == NULL) {
- first = root->prio_tree_node;
- prio_tree_remove(root, root->prio_tree_node);
- INIT_PRIO_TREE_NODE(first);
- last = first;
- } else {
- prev = last;
- last = root->prio_tree_node;
- prio_tree_remove(root, root->prio_tree_node);
- INIT_PRIO_TREE_NODE(last);
- prev->left = last;
- last->parent = prev;
- }
- }
-
- INIT_PRIO_TREE_NODE(node);
-
- if (first) {
- node->left = first;
- first->parent = node;
- } else
- last = node;
-
- if (!prio_tree_empty(root)) {
- last->left = root->prio_tree_node;
- last->left->parent = last;
- }
-
- root->prio_tree_node = node;
- return node;
-}
-
-/*
- * Replace a prio_tree_node with a new node and return the old node
- */
-static struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root,
- struct prio_tree_node *old, struct prio_tree_node *node)
-{
- INIT_PRIO_TREE_NODE(node);
-
- if (prio_tree_root(old)) {
- BUG_ON(root->prio_tree_node != old);
- /*
- * We can reduce root->index_bits here. However, it is complex
- * and does not help much to improve performance (IMO).
- */
- node->parent = node;
- root->prio_tree_node = node;
- } else {
- node->parent = old->parent;
- if (old->parent->left == old)
- old->parent->left = node;
- else
- old->parent->right = node;
- }
-
- if (!prio_tree_left_empty(old)) {
- node->left = old->left;
- old->left->parent = node;
- }
-
- if (!prio_tree_right_empty(old)) {
- node->right = old->right;
- old->right->parent = node;
- }
-
- return old;
-}
-
-/*
- * Insert a prio_tree_node @node into a radix priority search tree @root. The
- * algorithm typically takes O(log n) time where 'log n' is the number of bits
- * required to represent the maximum heap_index. In the worst case, the algo
- * can take O((log n)^2) - check prio_tree_expand.
- *
- * If a prior node with same radix_index and heap_index is already found in
- * the tree, then returns the address of the prior node. Otherwise, inserts
- * @node into the tree and returns @node.
- */
-static struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root,
- struct prio_tree_node *node)
-{
- struct prio_tree_node *cur, *res = node;
- unsigned long radix_index, heap_index;
- unsigned long r_index, h_index, index, mask;
- int size_flag = 0;
-
- GET_INDEX(node, radix_index, heap_index);
-
- if (prio_tree_empty(root) ||
- heap_index > prio_tree_maxindex(root->index_bits))
- return prio_tree_expand(root, node, heap_index);
-
- cur = root->prio_tree_node;
- mask = 1UL << (root->index_bits - 1);
-
- while (mask) {
- GET_INDEX(cur, r_index, h_index);
-
- if (r_index == radix_index && h_index == heap_index)
- return cur;
-
- if (h_index < heap_index ||
- (h_index == heap_index && r_index > radix_index)) {
- struct prio_tree_node *tmp = node;
- node = prio_tree_replace(root, cur, node);
- cur = tmp;
- /* swap indices */
- index = r_index;
- r_index = radix_index;
- radix_index = index;
- index = h_index;
- h_index = heap_index;
- heap_index = index;
- }
-
- if (size_flag)
- index = heap_index - radix_index;
- else
- index = radix_index;
-
- if (index & mask) {
- if (prio_tree_right_empty(cur)) {
- INIT_PRIO_TREE_NODE(node);
- cur->right = node;
- node->parent = cur;
- return res;
- } else
- cur = cur->right;
- } else {
- if (prio_tree_left_empty(cur)) {
- INIT_PRIO_TREE_NODE(node);
- cur->left = node;
- node->parent = cur;
- return res;
- } else
- cur = cur->left;
- }
-
- mask >>= 1;
-
- if (!mask) {
- mask = 1UL << (root->index_bits - 1);
- size_flag = 1;
- }
- }
- /* Should not reach here */
- BUG();
- return NULL;
-}
-
-/*
- * Remove a prio_tree_node @node from a radix priority search tree @root. The
- * algorithm takes O(log n) time where 'log n' is the number of bits required
- * to represent the maximum heap_index.
- */
-static void prio_tree_remove(struct prio_tree_root *root,
- struct prio_tree_node *node)
-{
- struct prio_tree_node *cur;
- unsigned long r_index, h_index_right, h_index_left;
-
- cur = node;
-
- while (!prio_tree_left_empty(cur) || !prio_tree_right_empty(cur)) {
- if (!prio_tree_left_empty(cur))
- GET_INDEX(cur->left, r_index, h_index_left);
- else {
- cur = cur->right;
- continue;
- }
-
- if (!prio_tree_right_empty(cur))
- GET_INDEX(cur->right, r_index, h_index_right);
- else {
- cur = cur->left;
- continue;
- }
-
- /* both h_index_left and h_index_right cannot be 0 */
- if (h_index_left >= h_index_right)
- cur = cur->left;
- else
- cur = cur->right;
- }
-
- if (prio_tree_root(cur)) {
- BUG_ON(root->prio_tree_node != cur);
- INIT_PRIO_TREE_ROOT(root);
- return;
- }
-
- if (cur->parent->right == cur)
- cur->parent->right = cur->parent;
- else
- cur->parent->left = cur->parent;
-
- while (cur != node)
- cur = prio_tree_replace(root, cur->parent, cur);
-}
-
-/*
- * Following functions help to enumerate all prio_tree_nodes in the tree that
- * overlap with the input interval X [radix_index, heap_index]. The enumeration
- * takes O(log n + m) time where 'log n' is the height of the tree (which is
- * proportional to # of bits required to represent the maximum heap_index) and
- * 'm' is the number of prio_tree_nodes that overlap the interval X.
- */
-
-static struct prio_tree_node *prio_tree_left(
- struct prio_tree_root *root, struct prio_tree_iter *iter,
- unsigned long radix_index, unsigned long heap_index,
- unsigned long *r_index, unsigned long *h_index)
-{
- if (prio_tree_left_empty(iter->cur))
- return NULL;
-
- GET_INDEX(iter->cur->left, *r_index, *h_index);
-
- if (radix_index <= *h_index) {
- iter->cur = iter->cur->left;
- iter->mask >>= 1;
- if (iter->mask) {
- if (iter->size_level)
- iter->size_level++;
- } else {
- if (iter->size_level) {
- BUG_ON(!prio_tree_left_empty(iter->cur));
- BUG_ON(!prio_tree_right_empty(iter->cur));
- iter->size_level++;
- iter->mask = ULONG_MAX;
- } else {
- iter->size_level = 1;
- iter->mask = 1UL << (root->index_bits - 1);
- }
- }
- return iter->cur;
- }
-
- return NULL;
-}
-
-static struct prio_tree_node *prio_tree_right(
- struct prio_tree_root *root, struct prio_tree_iter *iter,
- unsigned long radix_index, unsigned long heap_index,
- unsigned long *r_index, unsigned long *h_index)
-{
- unsigned long value;
-
- if (prio_tree_right_empty(iter->cur))
- return NULL;
-
- if (iter->size_level)
- value = iter->value;
- else
- value = iter->value | iter->mask;
-
- if (heap_index < value)
- return NULL;
-
- GET_INDEX(iter->cur->right, *r_index, *h_index);
-
- if (radix_index <= *h_index) {
- iter->cur = iter->cur->right;
- iter->mask >>= 1;
- iter->value = value;
- if (iter->mask) {
- if (iter->size_level)
- iter->size_level++;
- } else {
- if (iter->size_level) {
- BUG_ON(!prio_tree_left_empty(iter->cur));
- BUG_ON(!prio_tree_right_empty(iter->cur));
- iter->size_level++;
- iter->mask = ULONG_MAX;
- } else {
- iter->size_level = 1;
- iter->mask = 1UL << (root->index_bits - 1);
- }
- }
- return iter->cur;
- }
-
- return NULL;
-}
-
-static struct prio_tree_node *prio_tree_parent(struct prio_tree_iter *iter)
-{
- iter->cur = iter->cur->parent;
- if (iter->mask == ULONG_MAX)
- iter->mask = 1UL;
- else if (iter->size_level == 1)
- iter->mask = 1UL;
- else
- iter->mask <<= 1;
- if (iter->size_level)
- iter->size_level--;
- if (!iter->size_level && (iter->value & iter->mask))
- iter->value ^= iter->mask;
- return iter->cur;
-}
-
-static inline int overlap(unsigned long radix_index, unsigned long heap_index,
- unsigned long r_index, unsigned long h_index)
-{
- return heap_index >= r_index && radix_index <= h_index;
-}
-
-/*
- * prio_tree_first:
- *
- * Get the first prio_tree_node that overlaps with the interval [radix_index,
- * heap_index]. Note that always radix_index <= heap_index. We do a pre-order
- * traversal of the tree.
- */
-static struct prio_tree_node *prio_tree_first(struct prio_tree_root *root,
- struct prio_tree_iter *iter, unsigned long radix_index,
- unsigned long heap_index)
-{
- unsigned long r_index, h_index;
-
- INIT_PRIO_TREE_ITER(iter);
-
- if (prio_tree_empty(root))
- return NULL;
-
- GET_INDEX(root->prio_tree_node, r_index, h_index);
-
- if (radix_index > h_index)
- return NULL;
-
- iter->mask = 1UL << (root->index_bits - 1);
- iter->cur = root->prio_tree_node;
-
- while (1) {
- if (overlap(radix_index, heap_index, r_index, h_index))
- return iter->cur;
-
- if (prio_tree_left(root, iter, radix_index, heap_index,
- &r_index, &h_index))
- continue;
-
- if (prio_tree_right(root, iter, radix_index, heap_index,
- &r_index, &h_index))
- continue;
-
- break;
- }
- return NULL;
-}
-
-/*
- * prio_tree_next:
- *
- * Get the next prio_tree_node that overlaps with the input interval in iter
- */
-static struct prio_tree_node *prio_tree_next(struct prio_tree_root *root,
- struct prio_tree_iter *iter, unsigned long radix_index,
- unsigned long heap_index)
-{
- unsigned long r_index, h_index;
-
-repeat:
- while (prio_tree_left(root, iter, radix_index,
- heap_index, &r_index, &h_index)) {
- if (overlap(radix_index, heap_index, r_index, h_index))
- return iter->cur;
- }
-
- while (!prio_tree_right(root, iter, radix_index,
- heap_index, &r_index, &h_index)) {
- while (!prio_tree_root(iter->cur) &&
- iter->cur->parent->right == iter->cur)
- prio_tree_parent(iter);
-
- if (prio_tree_root(iter->cur))
- return NULL;
-
- prio_tree_parent(iter);
- }
-
- if (overlap(radix_index, heap_index, r_index, h_index))
- return iter->cur;
-
- goto repeat;
-}
-
-/*
- * Radix priority search tree for address_space->i_mmap
- *
- * For each vma that map a unique set of file pages i.e., unique [radix_index,
- * heap_index] value, we have a corresponing priority search tree node. If
- * multiple vmas have identical [radix_index, heap_index] value, then one of
- * them is used as a tree node and others are stored in a vm_set list. The tree
- * node points to the first vma (head) of the list using vm_set.head.
- *
- * prio_tree_root
- * |
- * A vm_set.head
- * / \ /
- * L R -> H-I-J-K-M-N-O-P-Q-S
- * ^ ^ <-- vm_set.list -->
- * tree nodes
- *
- * We need some way to identify whether a vma is a tree node, head of a vm_set
- * list, or just a member of a vm_set list. We cannot use vm_flags to store
- * such information. The reason is, in the above figure, it is possible that
- * vm_flags' of R and H are covered by the different mmap_sems. When R is
- * removed under R->mmap_sem, H replaces R as a tree node. Since we do not hold
- * H->mmap_sem, we cannot use H->vm_flags for marking that H is a tree node now.
- * That's why some trick involving shared.vm_set.parent is used for identifying
- * tree nodes and list head nodes.
- *
- * vma radix priority search tree node rules:
- *
- * vma->shared.vm_set.parent != NULL ==> a tree node
- * vma->shared.vm_set.head != NULL ==> list of others mapping same range
- * vma->shared.vm_set.head == NULL ==> no others map the same range
- *
- * vma->shared.vm_set.parent == NULL
- * vma->shared.vm_set.head != NULL ==> list head of vmas mapping same range
- * vma->shared.vm_set.head == NULL ==> a list node
- */
-
-/*
- * Add a new vma known to map the same set of pages as the old vma:
- * useful for fork's dup_mmap as well as vma_prio_tree_insert below.
- * Note that it just happens to work correctly on i_mmap_nonlinear too.
- */
-void vma_prio_tree_add(struct vm_area_struct *vma, struct vm_area_struct *old)
-{
- /* Leave these BUG_ONs till prio_tree patch stabilizes */
- BUG_ON(RADIX_INDEX(vma) != RADIX_INDEX(old));
- BUG_ON(HEAP_INDEX(vma) != HEAP_INDEX(old));
-
- if (!old->shared.vm_set.parent)
- list_add(&vma->shared.vm_set.list,
- &old->shared.vm_set.list);
- else if (old->shared.vm_set.head)
- list_add_tail(&vma->shared.vm_set.list,
- &old->shared.vm_set.head->shared.vm_set.list);
- else {
- INIT_LIST_HEAD(&vma->shared.vm_set.list);
- vma->shared.vm_set.head = old;
- old->shared.vm_set.head = vma;
- }
-}
-
-void vma_prio_tree_insert(struct vm_area_struct *vma,
- struct prio_tree_root *root)
-{
- struct prio_tree_node *ptr;
- struct vm_area_struct *old;
-
- ptr = prio_tree_insert(root, &vma->shared.prio_tree_node);
- if (ptr != &vma->shared.prio_tree_node) {
- old = prio_tree_entry(ptr, struct vm_area_struct,
- shared.prio_tree_node);
- vma_prio_tree_add(vma, old);
- }
-}
-
-void vma_prio_tree_remove(struct vm_area_struct *vma,
- struct prio_tree_root *root)
-{
- struct vm_area_struct *node, *head, *new_head;
-
- if (!vma->shared.vm_set.head) {
- if (!vma->shared.vm_set.parent)
- list_del_init(&vma->shared.vm_set.list);
- else
- prio_tree_remove(root, &vma->shared.prio_tree_node);
- } else {
- /* Leave this BUG_ON till prio_tree patch stabilizes */
- BUG_ON(vma->shared.vm_set.head->shared.vm_set.head != vma);
- if (vma->shared.vm_set.parent) {
- head = vma->shared.vm_set.head;
- if (!list_empty(&head->shared.vm_set.list)) {
- new_head = list_entry(
- head->shared.vm_set.list.next,
- struct vm_area_struct,
- shared.vm_set.list);
- list_del_init(&head->shared.vm_set.list);
- } else
- new_head = NULL;
-
- prio_tree_replace(root, &vma->shared.prio_tree_node,
- &head->shared.prio_tree_node);
- head->shared.vm_set.head = new_head;
- if (new_head)
- new_head->shared.vm_set.head = head;
-
- } else {
- node = vma->shared.vm_set.head;
- if (!list_empty(&vma->shared.vm_set.list)) {
- new_head = list_entry(
- vma->shared.vm_set.list.next,
- struct vm_area_struct,
- shared.vm_set.list);
- list_del_init(&vma->shared.vm_set.list);
- node->shared.vm_set.head = new_head;
- new_head->shared.vm_set.head = node;
- } else
- node->shared.vm_set.head = NULL;
- }
- }
-}
-
-/*
- * Helper function to enumerate vmas that map a given file page or a set of
- * contiguous file pages. The function returns vmas that at least map a single
- * page in the given range of contiguous file pages.
- */
-struct vm_area_struct *vma_prio_tree_next(struct vm_area_struct *vma,
- struct prio_tree_root *root, struct prio_tree_iter *iter,
- pgoff_t begin, pgoff_t end)
-{
- struct prio_tree_node *ptr;
- struct vm_area_struct *next;
-
- if (!vma) {
- /*
- * First call is with NULL vma
- */
- ptr = prio_tree_first(root, iter, begin, end);
- if (ptr) {
- next = prio_tree_entry(ptr, struct vm_area_struct,
- shared.prio_tree_node);
- prefetch(next->shared.vm_set.head);
- return next;
- } else
- return NULL;
- }
-
- if (vma->shared.vm_set.parent) {
- if (vma->shared.vm_set.head) {
- next = vma->shared.vm_set.head;
- prefetch(next->shared.vm_set.list.next);
- return next;
- }
- } else {
- next = list_entry(vma->shared.vm_set.list.next,
- struct vm_area_struct, shared.vm_set.list);
- if (!next->shared.vm_set.head) {
- prefetch(next->shared.vm_set.list.next);
- return next;
- }
- }
-
- ptr = prio_tree_next(root, iter, begin, end);
- if (ptr) {
- next = prio_tree_entry(ptr, struct vm_area_struct,
- shared.prio_tree_node);
- prefetch(next->shared.vm_set.head);
- return next;
- } else
- return NULL;
-}
+++ /dev/null
-/*
- * Sysfs attributes of bridge ports
- * Linux ethernet bridge
- *
- * Authors:
- * Stephen Hemminger <shemminger@osdl.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/if_bridge.h>
-#include <linux/rtnetlink.h>
-#include <linux/spinlock.h>
-
-#include "br_private.h"
-
-struct brport_attribute {
- struct attribute attr;
- ssize_t (*show)(struct net_bridge_port *, char *);
- ssize_t (*store)(struct net_bridge_port *, unsigned long);
-};
-
-#define BRPORT_ATTR(_name,_mode,_show,_store) \
-struct brport_attribute brport_attr_##_name = { \
- .attr = {.name = __stringify(_name), \
- .mode = _mode, \
- .owner = THIS_MODULE, }, \
- .show = _show, \
- .store = _store, \
-};
-
-static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->path_cost);
-}
-static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
-{
- br_stp_set_path_cost(p, v);
- return 0;
-}
-static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
- show_path_cost, store_path_cost);
-
-static ssize_t show_priority(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->priority);
-}
-static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
-{
- if (v >= (1<<(16-BR_PORT_BITS)))
- return -ERANGE;
- br_stp_set_port_priority(p, v);
- return 0;
-}
-static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
- show_priority, store_priority);
-
-static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
-{
- return br_show_bridge_id(buf, &p->designated_root);
-}
-static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
-
-static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
-{
- return br_show_bridge_id(buf, &p->designated_bridge);
-}
-static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
-
-static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->designated_port);
-}
-static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
-
-static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->designated_cost);
-}
-static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
-
-static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "0x%x\n", p->port_id);
-}
-static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
-
-static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "0x%x\n", p->port_no);
-}
-
-static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
-
-static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->topology_change_ack);
-}
-static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
-
-static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->config_pending);
-}
-static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
-
-static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
-{
- return sprintf(buf, "%d\n", p->state);
-}
-static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
-
-static ssize_t show_message_age_timer(struct net_bridge_port *p,
- char *buf)
-{
- return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
-}
-static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
-
-static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
- char *buf)
-{
- return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
-}
-static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
-
-static ssize_t show_hold_timer(struct net_bridge_port *p,
- char *buf)
-{
- return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
-}
-static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
-
-static struct brport_attribute *brport_attrs[] = {
- &brport_attr_path_cost,
- &brport_attr_priority,
- &brport_attr_port_id,
- &brport_attr_port_no,
- &brport_attr_designated_root,
- &brport_attr_designated_bridge,
- &brport_attr_designated_port,
- &brport_attr_designated_cost,
- &brport_attr_state,
- &brport_attr_change_ack,
- &brport_attr_config_pending,
- &brport_attr_message_age_timer,
- &brport_attr_forward_delay_timer,
- &brport_attr_hold_timer,
- NULL
-};
-
-#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
-#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
-
-static ssize_t brport_show(struct kobject * kobj,
- struct attribute * attr, char * buf)
-{
- struct brport_attribute * brport_attr = to_brport_attr(attr);
- struct net_bridge_port * p = to_brport(kobj);
-
- return brport_attr->show(p, buf);
-}
-
-static ssize_t brport_store(struct kobject * kobj,
- struct attribute * attr,
- const char * buf, size_t count)
-{
- struct brport_attribute * brport_attr = to_brport_attr(attr);
- struct net_bridge_port * p = to_brport(kobj);
- ssize_t ret = -EINVAL;
- char *endp;
- unsigned long val;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- val = simple_strtoul(buf, &endp, 0);
- if (endp != buf) {
- rtnl_lock();
- if (p->dev && p->br && brport_attr->store) {
- spin_lock_bh(&p->br->lock);
- ret = brport_attr->store(p, val);
- spin_unlock_bh(&p->br->lock);
- if (ret == 0)
- ret = count;
- }
- rtnl_unlock();
- }
- return ret;
-}
-
-/* called from kobject_put when port ref count goes to zero. */
-static void brport_release(struct kobject *kobj)
-{
- kfree(container_of(kobj, struct net_bridge_port, kobj));
-}
-
-static struct sysfs_ops brport_sysfs_ops = {
- .show = brport_show,
- .store = brport_store,
-};
-
-static struct kobj_type brport_ktype = {
- .sysfs_ops = &brport_sysfs_ops,
- .release = brport_release,
-};
-
-
-/*
- * Add sysfs entries to ethernet device added to a bridge.
- * Creates a brport subdirectory with bridge attributes.
- * Puts symlink in bridge's brport subdirectory
- */
-int br_sysfs_addif(struct net_bridge_port *p)
-{
- struct net_bridge *br = p->br;
- struct brport_attribute **a;
- int err;
-
- ASSERT_RTNL();
-
- kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR);
- p->kobj.ktype = &brport_ktype;
- p->kobj.parent = &(p->dev->class_dev.kobj);
- p->kobj.kset = &bridge_subsys.kset;
-
- err = kobject_add(&p->kobj);
- if(err)
- goto out1;
-
- err = sysfs_create_link(&p->kobj, &br->dev->class_dev.kobj,
- SYSFS_BRIDGE_PORT_LINK);
- if (err)
- goto out2;
-
- for (a = brport_attrs; *a; ++a) {
- err = sysfs_create_file(&p->kobj, &((*a)->attr));
- if (err)
- goto out2;
- }
-
- err = sysfs_create_link(&br->ifobj, &p->kobj, p->dev->name);
- if (err)
- goto out2;
-
- return 0;
- out2:
- kobject_del(&p->kobj);
- out1:
- return err;
-}
-
-void br_sysfs_removeif(struct net_bridge_port *p)
-{
- pr_debug("br_sysfs_removeif\n");
- sysfs_remove_link(&p->br->ifobj, p->dev->name);
- kobject_del(&p->kobj);
-}
-
-void br_sysfs_freeif(struct net_bridge_port *p)
-{
- pr_debug("br_sysfs_freeif\n");
- kobject_put(&p->kobj);
-}
+++ /dev/null
-#!/usr/bin/perl -w
-#
-# reference_discarded.pl (C) Keith Owens 2001 <kaos@ocs.com.au>
-#
-# Released under GPL V2.
-#
-# List dangling references to vmlinux discarded sections.
-
-use strict;
-die($0 . " takes no arguments\n") if($#ARGV >= 0);
-
-my %object;
-my $object;
-my $line;
-my $ignore;
-my $errorcount;
-
-$| = 1;
-
-# printf("Finding objects, ");
-open(OBJDUMP_LIST, "find . -name '*.o' | xargs objdump -h |") || die "getting objdump list failed";
-while (defined($line = <OBJDUMP_LIST>)) {
- chomp($line);
- if ($line =~ /:\s+file format/) {
- ($object = $line) =~ s/:.*//;
- $object{$object}->{'module'} = 0;
- $object{$object}->{'size'} = 0;
- $object{$object}->{'off'} = 0;
- }
- if ($line =~ /^\s*\d+\s+\.modinfo\s+/) {
- $object{$object}->{'module'} = 1;
- }
- if ($line =~ /^\s*\d+\s+\.comment\s+/) {
- ($object{$object}->{'size'}, $object{$object}->{'off'}) = (split(' ', $line))[2,5];
- }
-}
-close(OBJDUMP_LIST);
-# printf("%d objects, ", scalar keys(%object));
-$ignore = 0;
-foreach $object (keys(%object)) {
- if ($object{$object}->{'module'}) {
- ++$ignore;
- delete($object{$object});
- }
-}
-# printf("ignoring %d module(s)\n", $ignore);
-
-# Ignore conglomerate objects, they have been built from multiple objects and we
-# only care about the individual objects. If an object has more than one GCC:
-# string in the comment section then it is conglomerate. This does not filter
-# out conglomerates that consist of exactly one object, can't be helped.
-
-# printf("Finding conglomerates, ");
-$ignore = 0;
-foreach $object (keys(%object)) {
- if (exists($object{$object}->{'off'})) {
- my ($off, $size, $comment, $l);
- $off = hex($object{$object}->{'off'});
- $size = hex($object{$object}->{'size'});
- open(OBJECT, "<$object") || die "cannot read $object";
- seek(OBJECT, $off, 0) || die "seek to $off in $object failed";
- $l = read(OBJECT, $comment, $size);
- die "read $size bytes from $object .comment failed" if ($l != $size);
- close(OBJECT);
- if ($comment =~ /GCC\:.*GCC\:/m) {
- ++$ignore;
- delete($object{$object});
- }
- }
-}
-# printf("ignoring %d conglomerate(s)\n", $ignore);
-
-# printf("Scanning objects\n");
-$errorcount = 0;
-foreach $object (keys(%object)) {
- my $from;
- open(OBJDUMP, "objdump -r $object|") || die "cannot objdump -r $object";
- while (defined($line = <OBJDUMP>)) {
- chomp($line);
- if ($line =~ /RELOCATION RECORDS FOR /) {
- ($from = $line) =~ s/.*\[([^]]*).*/$1/;
- }
- if (($line =~ /\.text\.exit$/ ||
- $line =~ /\.exit\.text$/ ||
- $line =~ /\.data\.exit$/ ||
- $line =~ /\.exit\.data$/ ||
- $line =~ /\.exitcall\.exit$/) &&
- ($from !~ /\.text\.exit$/ &&
- $from !~ /\.exit\.text$/ &&
- $from !~ /\.data\.exit$/ &&
- $from !~ /\.exit\.data$/ &&
- $from !~ /\.altinstructions$/ &&
- $from !~ /\.debug_info$/ &&
- $from !~ /\.debug_aranges$/ &&
- $from !~ /\.debug_ranges$/ &&
- $from !~ /\.debug_line$/ &&
- $from !~ /\.debug_frame$/ &&
- $from !~ /\.exitcall\.exit$/ &&
- $from !~ /\.eh_frame$/ &&
- $from !~ /\.stab$/)) {
- printf("Error: %s %s refers to %s\n", $object, $from, $line);
- $errorcount = $errorcount + 1;
- }
- }
- close(OBJDUMP);
-}
-# printf("Done\n");
-
-exit($errorcount);
git://git.onelab.eu / linux-2.6.git / commitdiff