1 /******************************************************************************
2 ** Device driver for the PCI-SCSI NCR538XX controller family.
4 ** Copyright (C) 1994 Wolfgang Stanglmeier
6 ** This program is free software; you can redistribute it and/or modify
7 ** it under the terms of the GNU General Public License as published by
8 ** the Free Software Foundation; either version 2 of the License, or
9 ** (at your option) any later version.
11 ** This program is distributed in the hope that it will be useful,
12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ** GNU General Public License for more details.
16 ** You should have received a copy of the GNU General Public License
17 ** along with this program; if not, write to the Free Software
18 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 **-----------------------------------------------------------------------------
22 ** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
23 ** and is currently maintained by
25 ** Gerard Roudier <groudier@free.fr>
27 ** Being given that this driver originates from the FreeBSD version, and
28 ** in order to keep synergy on both, any suggested enhancements and corrections
29 ** received on Linux are automatically a potential candidate for the FreeBSD
32 ** The original driver has been written for 386bsd and FreeBSD by
33 ** Wolfgang Stanglmeier <wolf@cologne.de>
34 ** Stefan Esser <se@mi.Uni-Koeln.de>
36 ** And has been ported to NetBSD by
37 ** Charles M. Hannum <mycroft@gnu.ai.mit.edu>
39 **-----------------------------------------------------------------------------
43 ** December 10 1995 by Gerard Roudier:
44 ** Initial port to Linux.
46 ** June 23 1996 by Gerard Roudier:
47 ** Support for 64 bits architectures (Alpha).
49 ** November 30 1996 by Gerard Roudier:
50 ** Support for Fast-20 scsi.
51 ** Support for large DMA fifo and 128 dwords bursting.
53 ** February 27 1997 by Gerard Roudier:
54 ** Support for Fast-40 scsi.
55 ** Support for on-Board RAM.
57 ** May 3 1997 by Gerard Roudier:
58 ** Full support for scsi scripts instructions pre-fetching.
60 ** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
61 ** Support for NvRAM detection and reading.
63 ** August 18 1997 by Cort <cort@cs.nmt.edu>:
64 ** Support for Power/PC (Big Endian).
66 ** June 20 1998 by Gerard Roudier
67 ** Support for up to 64 tags per lun.
68 ** O(1) everywhere (C and SCRIPTS) for normal cases.
69 ** Low PCI traffic for command handling when on-chip RAM is present.
70 ** Aggressive SCSI SCRIPTS optimizations.
72 *******************************************************************************
76 ** Supported SCSI-II features:
77 ** Synchronous negotiation
78 ** Wide negotiation (depends on the NCR Chip)
79 ** Enable disconnection
80 ** Tagged command queuing
84 ** Supported NCR/SYMBIOS chips:
85 ** 53C720 (Wide, Fast SCSI-2, intfly problems)
88 /* Name and version of the driver */
89 #define SCSI_NCR_DRIVER_NAME "ncr53c8xx-3.4.3f"
91 #define SCSI_NCR_DEBUG_FLAGS (0)
93 /*==========================================================
97 **==========================================================
100 #include <linux/blkdev.h>
101 #include <linux/delay.h>
102 #include <linux/dma-mapping.h>
103 #include <linux/errno.h>
104 #include <linux/init.h>
105 #include <linux/interrupt.h>
106 #include <linux/ioport.h>
107 #include <linux/mm.h>
108 #include <linux/module.h>
109 #include <linux/sched.h>
110 #include <linux/signal.h>
111 #include <linux/spinlock.h>
112 #include <linux/stat.h>
113 #include <linux/string.h>
114 #include <linux/time.h>
115 #include <linux/timer.h>
116 #include <linux/types.h>
120 #include <asm/system.h>
122 #include <scsi/scsi.h>
123 #include <scsi/scsi_cmnd.h>
124 #include <scsi/scsi_device.h>
125 #include <scsi/scsi_tcq.h>
126 #include <scsi/scsi_transport.h>
127 #include <scsi/scsi_transport_spi.h>
129 #include "ncr53c8xx.h"
131 #define NAME53C "ncr53c"
132 #define NAME53C8XX "ncr53c8xx"
134 #include "sym53c8xx_comm.h"
137 /*==========================================================
139 ** The CCB done queue uses an array of CCB virtual
140 ** addresses. Empty entries are flagged using the bogus
141 ** virtual address 0xffffffff.
143 ** Since PCI ensures that only aligned DWORDs are accessed
144 ** atomically, 64 bit little-endian architecture requires
145 ** to test the high order DWORD of the entry to determine
146 ** if it is empty or valid.
148 ** BTW, I will make things differently as soon as I will
149 ** have a better idea, but this is simple and should work.
151 **==========================================================
154 #define SCSI_NCR_CCB_DONE_SUPPORT
155 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
158 #define CCB_DONE_EMPTY 0xffffffffUL
160 /* All 32 bit architectures */
161 #if BITS_PER_LONG == 32
162 #define CCB_DONE_VALID(cp) (((u_long) cp) != CCB_DONE_EMPTY)
164 /* All > 32 bit (64 bit) architectures regardless endian-ness */
166 #define CCB_DONE_VALID(cp) \
167 ((((u_long) cp) & 0xffffffff00000000ul) && \
168 (((u_long) cp) & 0xfffffffful) != CCB_DONE_EMPTY)
171 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
173 /*==========================================================
175 ** Configuration and Debugging
177 **==========================================================
181 ** SCSI address of this device.
182 ** The boot routines should have set it.
186 #ifndef SCSI_NCR_MYADDR
187 #define SCSI_NCR_MYADDR (7)
191 ** The maximum number of tags per logic unit.
192 ** Used only for disk devices that support tags.
195 #ifndef SCSI_NCR_MAX_TAGS
196 #define SCSI_NCR_MAX_TAGS (8)
200 ** TAGS are actually limited to 64 tags/lun.
201 ** We need to deal with power of 2, for alignment constraints.
203 #if SCSI_NCR_MAX_TAGS > 64
204 #define MAX_TAGS (64)
206 #define MAX_TAGS SCSI_NCR_MAX_TAGS
212 ** Choose appropriate type for tag bitmap.
215 typedef u64 tagmap_t;
217 typedef u32 tagmap_t;
221 ** Number of targets supported by the driver.
222 ** n permits target numbers 0..n-1.
223 ** Default is 16, meaning targets #0..#15.
227 #ifdef SCSI_NCR_MAX_TARGET
228 #define MAX_TARGET (SCSI_NCR_MAX_TARGET)
230 #define MAX_TARGET (16)
234 ** Number of logic units supported by the driver.
235 ** n enables logic unit numbers 0..n-1.
236 ** The common SCSI devices require only
237 ** one lun, so take 1 as the default.
240 #ifdef SCSI_NCR_MAX_LUN
241 #define MAX_LUN SCSI_NCR_MAX_LUN
247 ** Asynchronous pre-scaler (ns). Shall be 40
250 #ifndef SCSI_NCR_MIN_ASYNC
251 #define SCSI_NCR_MIN_ASYNC (40)
255 ** The maximum number of jobs scheduled for starting.
256 ** There should be one slot per target, and one slot
257 ** for each tag of each target in use.
258 ** The calculation below is actually quite silly ...
261 #ifdef SCSI_NCR_CAN_QUEUE
262 #define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
264 #define MAX_START (MAX_TARGET + 7 * MAX_TAGS)
268 ** We limit the max number of pending IO to 250.
269 ** since we donnot want to allocate more than 1
270 ** PAGE for 'scripth'.
274 #define MAX_START 250
278 ** The maximum number of segments a transfer is split into.
279 ** We support up to 127 segments for both read and write.
280 ** The data scripts are broken into 2 sub-scripts.
281 ** 80 (MAX_SCATTERL) segments are moved from a sub-script
282 ** in on-chip RAM. This makes data transfers shorter than
283 ** 80k (assuming 1k fs) as fast as possible.
286 #define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
288 #if (MAX_SCATTER > 80)
289 #define MAX_SCATTERL 80
290 #define MAX_SCATTERH (MAX_SCATTER - MAX_SCATTERL)
292 #define MAX_SCATTERL (MAX_SCATTER-1)
293 #define MAX_SCATTERH 1
300 #define NCR_SNOOP_TIMEOUT (1000000)
306 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f))
308 #define initverbose (driver_setup.verbose)
309 #define bootverbose (np->verbose)
311 /*==========================================================
313 ** Command control block states.
315 **==========================================================
320 #define HS_NEGOTIATE (2) /* sync/wide data transfer*/
321 #define HS_DISCONNECT (3) /* Disconnected by target */
323 #define HS_DONEMASK (0x80)
324 #define HS_COMPLETE (4|HS_DONEMASK)
325 #define HS_SEL_TIMEOUT (5|HS_DONEMASK) /* Selection timeout */
326 #define HS_RESET (6|HS_DONEMASK) /* SCSI reset */
327 #define HS_ABORTED (7|HS_DONEMASK) /* Transfer aborted */
328 #define HS_TIMEOUT (8|HS_DONEMASK) /* Software timeout */
329 #define HS_FAIL (9|HS_DONEMASK) /* SCSI or PCI bus errors */
330 #define HS_UNEXPECTED (10|HS_DONEMASK)/* Unexpected disconnect */
333 ** Invalid host status values used by the SCRIPTS processor
334 ** when the nexus is not fully identified.
335 ** Shall never appear in a CCB.
338 #define HS_INVALMASK (0x40)
339 #define HS_SELECTING (0|HS_INVALMASK)
340 #define HS_IN_RESELECT (1|HS_INVALMASK)
341 #define HS_STARTING (2|HS_INVALMASK)
344 ** Flags set by the SCRIPT processor for commands
345 ** that have been skipped.
347 #define HS_SKIPMASK (0x20)
349 /*==========================================================
351 ** Software Interrupt Codes
353 **==========================================================
356 #define SIR_BAD_STATUS (1)
357 #define SIR_XXXXXXXXXX (2)
358 #define SIR_NEGO_SYNC (3)
359 #define SIR_NEGO_WIDE (4)
360 #define SIR_NEGO_FAILED (5)
361 #define SIR_NEGO_PROTO (6)
362 #define SIR_REJECT_RECEIVED (7)
363 #define SIR_REJECT_SENT (8)
364 #define SIR_IGN_RESIDUE (9)
365 #define SIR_MISSING_SAVE (10)
366 #define SIR_RESEL_NO_MSG_IN (11)
367 #define SIR_RESEL_NO_IDENTIFY (12)
368 #define SIR_RESEL_BAD_LUN (13)
369 #define SIR_RESEL_BAD_TARGET (14)
370 #define SIR_RESEL_BAD_I_T_L (15)
371 #define SIR_RESEL_BAD_I_T_L_Q (16)
372 #define SIR_DONE_OVERFLOW (17)
373 #define SIR_INTFLY (18)
376 /*==========================================================
378 ** Extended error codes.
379 ** xerr_status field of struct ccb.
381 **==========================================================
385 #define XE_EXTRA_DATA (1) /* unexpected data phase */
386 #define XE_BAD_PHASE (2) /* illegal phase (4/5) */
388 /*==========================================================
390 ** Negotiation status.
391 ** nego_status field of struct ccb.
393 **==========================================================
396 #define NS_NOCHANGE (0)
401 /*==========================================================
405 **==========================================================
408 #define CCB_MAGIC (0xf2691ad2)
410 /*==========================================================
412 ** Declaration of structs.
414 **==========================================================
417 static struct scsi_transport_template *ncr53c8xx_transport_template = NULL;
437 #define UC_SETSYNC 10
438 #define UC_SETTAGS 11
439 #define UC_SETDEBUG 12
440 #define UC_SETORDER 13
441 #define UC_SETWIDE 14
442 #define UC_SETFLAG 15
443 #define UC_SETVERBOSE 17
445 #define UF_TRACE (0x01)
446 #define UF_NODISC (0x02)
447 #define UF_NOSCAN (0x04)
449 /*========================================================================
451 ** Declaration of structs: target control block
453 **========================================================================
456 /*----------------------------------------------------------------
457 ** During reselection the ncr jumps to this point with SFBR
458 ** set to the encoded target number with bit 7 set.
459 ** if it's not this target, jump to the next.
461 ** JUMP IF (SFBR != #target#), @(next tcb)
462 **----------------------------------------------------------------
464 struct link jump_tcb;
466 /*----------------------------------------------------------------
467 ** Load the actual values for the sxfer and the scntl3
468 ** register (sync/wide mode).
470 ** SCR_COPY (1), @(sval field of this tcb), @(sxfer register)
471 ** SCR_COPY (1), @(wval field of this tcb), @(scntl3 register)
472 **----------------------------------------------------------------
476 /*----------------------------------------------------------------
477 ** Get the IDENTIFY message and load the LUN to SFBR.
480 **----------------------------------------------------------------
482 struct link call_lun;
484 /*----------------------------------------------------------------
485 ** Now look for the right lun.
488 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(first lcb mod. i)
490 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
491 ** It is kind of hashcoding.
492 **----------------------------------------------------------------
494 struct link jump_lcb[4]; /* JUMPs for reselection */
495 struct lcb * lp[MAX_LUN]; /* The lcb's of this tcb */
497 /*----------------------------------------------------------------
498 ** Pointer to the ccb used for negotiation.
499 ** Prevent from starting a negotiation for all queued commands
500 ** when tagged command queuing is enabled.
501 **----------------------------------------------------------------
503 struct ccb * nego_cp;
505 /*----------------------------------------------------------------
507 **----------------------------------------------------------------
512 /*----------------------------------------------------------------
513 ** negotiation of wide and synch transfer and device quirks.
514 **----------------------------------------------------------------
516 #ifdef SCSI_NCR_BIG_ENDIAN
519 /*3*/ u_char minsync;
521 /*1*/ u_char widedone;
523 /*3*/ u_char maxoffs;
525 /*0*/ u_char minsync;
528 /*0*/ u_char maxoffs;
530 /*2*/ u_char widedone;
534 /* User settable limits and options. */
539 struct scsi_target *starget;
542 /*========================================================================
544 ** Declaration of structs: lun control block
546 **========================================================================
549 /*----------------------------------------------------------------
550 ** During reselection the ncr jumps to this point
551 ** with SFBR set to the "Identify" message.
552 ** if it's not this lun, jump to the next.
554 ** JUMP IF (SFBR != #lun#), @(next lcb of this target)
556 ** It is this lun. Load TEMP with the nexus jumps table
557 ** address and jump to RESEL_TAG (or RESEL_NOTAG).
559 ** SCR_COPY (4), p_jump_ccb, TEMP,
560 ** SCR_JUMP, <RESEL_TAG>
561 **----------------------------------------------------------------
563 struct link jump_lcb;
564 ncrcmd load_jump_ccb[3];
565 struct link jump_tag;
566 ncrcmd p_jump_ccb; /* Jump table bus address */
568 /*----------------------------------------------------------------
569 ** Jump table used by the script processor to directly jump
570 ** to the CCB corresponding to the reselected nexus.
571 ** Address is allocated on 256 bytes boundary in order to
572 ** allow 8 bit calculation of the tag jump entry for up to
574 **----------------------------------------------------------------
576 u32 jump_ccb_0; /* Default table if no tags */
577 u32 *jump_ccb; /* Virtual address */
579 /*----------------------------------------------------------------
580 ** CCB queue management.
581 **----------------------------------------------------------------
583 struct list_head free_ccbq; /* Queue of available CCBs */
584 struct list_head busy_ccbq; /* Queue of busy CCBs */
585 struct list_head wait_ccbq; /* Queue of waiting for IO CCBs */
586 struct list_head skip_ccbq; /* Queue of skipped CCBs */
587 u_char actccbs; /* Number of allocated CCBs */
588 u_char busyccbs; /* CCBs busy for this lun */
589 u_char queuedccbs; /* CCBs queued to the controller*/
590 u_char queuedepth; /* Queue depth for this lun */
591 u_char scdev_depth; /* SCSI device queue depth */
592 u_char maxnxs; /* Max possible nexuses */
594 /*----------------------------------------------------------------
595 ** Control of tagged command queuing.
596 ** Tags allocation is performed using a circular buffer.
597 ** This avoids using a loop for tag allocation.
598 **----------------------------------------------------------------
600 u_char ia_tag; /* Allocation index */
601 u_char if_tag; /* Freeing index */
602 u_char cb_tags[MAX_TAGS]; /* Circular tags buffer */
603 u_char usetags; /* Command queuing is active */
604 u_char maxtags; /* Max nr of tags asked by user */
605 u_char numtags; /* Current number of tags */
607 /*----------------------------------------------------------------
608 ** QUEUE FULL control and ORDERED tag control.
609 **----------------------------------------------------------------
611 /*----------------------------------------------------------------
612 ** QUEUE FULL and ORDERED tag control.
613 **----------------------------------------------------------------
615 u16 num_good; /* Nr of GOOD since QUEUE FULL */
616 tagmap_t tags_umap; /* Used tags bitmap */
617 tagmap_t tags_smap; /* Tags in use at 'tag_stime' */
618 u_long tags_stime; /* Last time we set smap=umap */
619 struct ccb * held_ccb; /* CCB held for QUEUE FULL */
622 /*========================================================================
624 ** Declaration of structs: the launch script.
626 **========================================================================
628 ** It is part of the CCB and is called by the scripts processor to
629 ** start or restart the data structure (nexus).
630 ** This 6 DWORDs mini script makes use of prefetching.
632 **------------------------------------------------------------------------
635 /*----------------------------------------------------------------
636 ** SCR_COPY(4), @(p_phys), @(dsa register)
637 ** SCR_JUMP, @(scheduler_point)
638 **----------------------------------------------------------------
640 ncrcmd setup_dsa[3]; /* Copy 'phys' address to dsa */
641 struct link schedule; /* Jump to scheduler point */
642 ncrcmd p_phys; /* 'phys' header bus address */
645 /*========================================================================
647 ** Declaration of structs: global HEADER.
649 **========================================================================
651 ** This substructure is copied from the ccb to a global address after
652 ** selection (or reselection) and copied back before disconnect.
654 ** These fields are accessible to the script processor.
656 **------------------------------------------------------------------------
660 /*----------------------------------------------------------------
661 ** Saved data pointer.
662 ** Points to the position in the script responsible for the
663 ** actual transfer transfer of data.
664 ** It's written after reception of a SAVE_DATA_POINTER message.
665 ** The goalpointer points after the last transfer command.
666 **----------------------------------------------------------------
672 /*----------------------------------------------------------------
673 ** Alternate data pointer.
674 ** They are copied back to savep/lastp/goalp by the SCRIPTS
675 ** when the direction is unknown and the device claims data out.
676 **----------------------------------------------------------------
681 /*----------------------------------------------------------------
682 ** The virtual address of the ccb containing this header.
683 **----------------------------------------------------------------
687 /*----------------------------------------------------------------
689 **----------------------------------------------------------------
691 u_char scr_st[4]; /* script status */
692 u_char status[4]; /* host status. must be the */
693 /* last DWORD of the header. */
697 ** The status bytes are used by the host and the script processor.
699 ** The byte corresponding to the host_status must be stored in the
700 ** last DWORD of the CCB header since it is used for command
701 ** completion (ncr_wakeup()). Doing so, we are sure that the header
702 ** has been entirely copied back to the CCB when the host_status is
703 ** seen complete by the CPU.
705 ** The last four bytes (status[4]) are copied to the scratchb register
706 ** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
707 ** and copied back just after disconnecting.
708 ** Inside the script the XX_REG are used.
710 ** The first four bytes (scr_st[4]) are used inside the script by
712 ** Because source and destination must have the same alignment
713 ** in a DWORD, the fields HAVE to be at the choosen offsets.
714 ** xerr_st 0 (0x34) scratcha
715 ** sync_st 1 (0x05) sxfer
716 ** wide_st 3 (0x03) scntl3
720 ** Last four bytes (script)
724 #define HS_PRT nc_scr1
726 #define SS_PRT nc_scr2
730 ** Last four bytes (host)
732 #ifdef SCSI_NCR_BIG_ENDIAN
733 #define actualquirks phys.header.status[3]
734 #define host_status phys.header.status[2]
735 #define scsi_status phys.header.status[1]
736 #define parity_status phys.header.status[0]
738 #define actualquirks phys.header.status[0]
739 #define host_status phys.header.status[1]
740 #define scsi_status phys.header.status[2]
741 #define parity_status phys.header.status[3]
745 ** First four bytes (script)
747 #define xerr_st header.scr_st[0]
748 #define sync_st header.scr_st[1]
749 #define nego_st header.scr_st[2]
750 #define wide_st header.scr_st[3]
753 ** First four bytes (host)
755 #define xerr_status phys.xerr_st
756 #define nego_status phys.nego_st
759 #define sync_status phys.sync_st
760 #define wide_status phys.wide_st
763 /*==========================================================
765 ** Declaration of structs: Data structure block
767 **==========================================================
769 ** During execution of a ccb by the script processor,
770 ** the DSA (data structure address) register points
771 ** to this substructure of the ccb.
772 ** This substructure contains the header with
773 ** the script-processor-changable data and
774 ** data blocks for the indirect move commands.
776 **----------------------------------------------------------
788 ** Table data for Script
791 struct scr_tblsel select;
792 struct scr_tblmove smsg ;
793 struct scr_tblmove cmd ;
794 struct scr_tblmove sense ;
795 struct scr_tblmove data[MAX_SCATTER];
799 /*========================================================================
801 ** Declaration of structs: Command control block.
803 **========================================================================
806 /*----------------------------------------------------------------
807 ** This is the data structure which is pointed by the DSA
808 ** register when it is executed by the script processor.
809 ** It must be the first entry because it contains the header
810 ** as first entry that must be cache line aligned.
811 **----------------------------------------------------------------
815 /*----------------------------------------------------------------
816 ** Mini-script used at CCB execution start-up.
817 ** Load the DSA with the data structure address (phys) and
818 ** jump to SELECT. Jump to CANCEL if CCB is to be canceled.
819 **----------------------------------------------------------------
823 /*----------------------------------------------------------------
824 ** Mini-script used at CCB relection to restart the nexus.
825 ** Load the DSA with the data structure address (phys) and
826 ** jump to RESEL_DSA. Jump to ABORT if CCB is to be aborted.
827 **----------------------------------------------------------------
829 struct launch restart;
831 /*----------------------------------------------------------------
832 ** If a data transfer phase is terminated too early
833 ** (after reception of a message (i.e. DISCONNECT)),
834 ** we have to prepare a mini script to transfer
835 ** the rest of the data.
836 **----------------------------------------------------------------
840 /*----------------------------------------------------------------
841 ** The general SCSI driver provides a
842 ** pointer to a control block.
843 **----------------------------------------------------------------
845 struct scsi_cmnd *cmd; /* SCSI command */
846 u_char cdb_buf[16]; /* Copy of CDB */
847 u_char sense_buf[64];
848 int data_len; /* Total data length */
850 /*----------------------------------------------------------------
852 ** We prepare a message to be sent after selection.
853 ** We may use a second one if the command is rescheduled
854 ** due to GETCC or QFULL.
855 ** Contents are IDENTIFY and SIMPLE_TAG.
856 ** While negotiating sync or wide transfer,
857 ** a SDTR or WDTR message is appended.
858 **----------------------------------------------------------------
860 u_char scsi_smsg [8];
861 u_char scsi_smsg2[8];
863 /*----------------------------------------------------------------
865 **----------------------------------------------------------------
867 u_long p_ccb; /* BUS address of this CCB */
868 u_char sensecmd[6]; /* Sense command */
869 u_char tag; /* Tag for this transfer */
870 /* 255 means no tag */
875 struct ccb * link_ccb; /* Host adapter CCB chain */
876 struct list_head link_ccbq; /* Link to unit CCB queue */
877 u32 startp; /* Initial data pointer */
878 u_long magic; /* Free / busy CCB flag */
881 #define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
884 /*========================================================================
886 ** Declaration of structs: NCR device descriptor
888 **========================================================================
891 /*----------------------------------------------------------------
892 ** The global header.
893 ** It is accessible to both the host and the script processor.
894 ** Must be cache line size aligned (32 for x86) in order to
895 ** allow cache line bursting when it is copied to/from CCB.
896 **----------------------------------------------------------------
900 /*----------------------------------------------------------------
901 ** CCBs management queues.
902 **----------------------------------------------------------------
904 struct scsi_cmnd *waiting_list; /* Commands waiting for a CCB */
905 /* when lcb is not allocated. */
906 struct scsi_cmnd *done_list; /* Commands waiting for done() */
907 /* callback to be invoked. */
908 spinlock_t smp_lock; /* Lock for SMP threading */
910 /*----------------------------------------------------------------
911 ** Chip and controller indentification.
912 **----------------------------------------------------------------
914 int unit; /* Unit number */
915 char inst_name[16]; /* ncb instance name */
917 /*----------------------------------------------------------------
918 ** Initial value of some IO register bits.
919 ** These values are assumed to have been set by BIOS, and may
920 ** be used for probing adapter implementation differences.
921 **----------------------------------------------------------------
923 u_char sv_scntl0, sv_scntl3, sv_dmode, sv_dcntl, sv_ctest0, sv_ctest3,
924 sv_ctest4, sv_ctest5, sv_gpcntl, sv_stest2, sv_stest4;
926 /*----------------------------------------------------------------
927 ** Actual initial value of IO register bits used by the
928 ** driver. They are loaded at initialisation according to
929 ** features that are to be enabled.
930 **----------------------------------------------------------------
932 u_char rv_scntl0, rv_scntl3, rv_dmode, rv_dcntl, rv_ctest0, rv_ctest3,
933 rv_ctest4, rv_ctest5, rv_stest2;
935 /*----------------------------------------------------------------
936 ** Targets management.
937 ** During reselection the ncr jumps to jump_tcb.
938 ** The SFBR register is loaded with the encoded target id.
940 ** SCR_JUMP ^ IFTRUE(MASK(i, 3)), @(next tcb mod. i)
942 ** Recent chips will prefetch the 4 JUMPS using only 1 burst.
943 ** It is kind of hashcoding.
944 **----------------------------------------------------------------
946 struct link jump_tcb[4]; /* JUMPs for reselection */
947 struct tcb target[MAX_TARGET]; /* Target data */
949 /*----------------------------------------------------------------
950 ** Virtual and physical bus addresses of the chip.
951 **----------------------------------------------------------------
953 void __iomem *vaddr; /* Virtual and bus address of */
954 unsigned long paddr; /* chip's IO registers. */
955 unsigned long paddr2; /* On-chip RAM bus address. */
956 volatile /* Pointer to volatile for */
957 struct ncr_reg __iomem *reg; /* memory mapped IO. */
959 /*----------------------------------------------------------------
960 ** SCRIPTS virtual and physical bus addresses.
961 ** 'script' is loaded in the on-chip RAM if present.
962 ** 'scripth' stays in main memory.
963 **----------------------------------------------------------------
965 struct script *script0; /* Copies of script and scripth */
966 struct scripth *scripth0; /* relocated for this ncb. */
967 struct scripth *scripth; /* Actual scripth virt. address */
968 u_long p_script; /* Actual script and scripth */
969 u_long p_scripth; /* bus addresses. */
971 /*----------------------------------------------------------------
972 ** General controller parameters and configuration.
973 **----------------------------------------------------------------
976 u_char revision_id; /* PCI device revision id */
977 u32 irq; /* IRQ level */
978 u32 features; /* Chip features map */
979 u_char myaddr; /* SCSI id of the adapter */
980 u_char maxburst; /* log base 2 of dwords burst */
981 u_char maxwide; /* Maximum transfer width */
982 u_char minsync; /* Minimum sync period factor */
983 u_char maxsync; /* Maximum sync period factor */
984 u_char maxoffs; /* Max scsi offset */
985 u_char multiplier; /* Clock multiplier (1,2,4) */
986 u_char clock_divn; /* Number of clock divisors */
987 u_long clock_khz; /* SCSI clock frequency in KHz */
989 /*----------------------------------------------------------------
990 ** Start queue management.
991 ** It is filled up by the host processor and accessed by the
992 ** SCRIPTS processor in order to start SCSI commands.
993 **----------------------------------------------------------------
995 u16 squeueput; /* Next free slot of the queue */
996 u16 actccbs; /* Number of allocated CCBs */
997 u16 queuedccbs; /* Number of CCBs in start queue*/
998 u16 queuedepth; /* Start queue depth */
1000 /*----------------------------------------------------------------
1002 **----------------------------------------------------------------
1004 struct timer_list timer; /* Timer handler link header */
1006 u_long settle_time; /* Resetting the SCSI BUS */
1008 /*----------------------------------------------------------------
1009 ** Debugging and profiling.
1010 **----------------------------------------------------------------
1012 struct ncr_reg regdump; /* Register dump */
1013 u_long regtime; /* Time it has been done */
1015 /*----------------------------------------------------------------
1016 ** Miscellaneous buffers accessed by the scripts-processor.
1017 ** They shall be DWORD aligned, because they may be read or
1018 ** written with a SCR_COPY script command.
1019 **----------------------------------------------------------------
1021 u_char msgout[8]; /* Buffer for MESSAGE OUT */
1022 u_char msgin [8]; /* Buffer for MESSAGE IN */
1023 u32 lastmsg; /* Last SCSI message sent */
1024 u_char scratch; /* Scratch for SCSI receive */
1026 /*----------------------------------------------------------------
1027 ** Miscellaneous configuration and status parameters.
1028 **----------------------------------------------------------------
1030 u_char disc; /* Diconnection allowed */
1031 u_char scsi_mode; /* Current SCSI BUS mode */
1032 u_char order; /* Tag order to use */
1033 u_char verbose; /* Verbosity for this controller*/
1034 int ncr_cache; /* Used for cache test at init. */
1035 u_long p_ncb; /* BUS address of this NCB */
1037 /*----------------------------------------------------------------
1038 ** Command completion handling.
1039 **----------------------------------------------------------------
1041 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1042 struct ccb *(ccb_done[MAX_DONE]);
1045 /*----------------------------------------------------------------
1046 ** Fields that should be removed or changed.
1047 **----------------------------------------------------------------
1049 struct ccb *ccb; /* Global CCB */
1050 struct usrcmd user; /* Command from user */
1051 volatile u_char release_stage; /* Synchronisation stage on release */
1054 #define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
1055 #define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth,lbl))
1057 /*==========================================================
1060 ** Script for NCR-Processor.
1062 ** Use ncr_script_fill() to create the variable parts.
1063 ** Use ncr_script_copy_and_bind() to make a copy and
1064 ** bind to physical addresses.
1067 **==========================================================
1069 ** We have to know the offsets of all labels before
1070 ** we reach them (for forward jumps).
1071 ** Therefore we declare a struct here.
1072 ** If you make changes inside the script,
1073 ** DONT FORGET TO CHANGE THE LENGTHS HERE!
1075 **----------------------------------------------------------
1079 ** For HP Zalon/53c720 systems, the Zalon interface
1080 ** between CPU and 53c720 does prefetches, which causes
1081 ** problems with self modifying scripts. The problem
1082 ** is overcome by calling a dummy subroutine after each
1083 ** modification, to force a refetch of the script on
1084 ** return from the subroutine.
1087 #ifdef CONFIG_NCR53C8XX_PREFETCH
1088 #define PREFETCH_FLUSH_CNT 2
1089 #define PREFETCH_FLUSH SCR_CALL, PADDRH (wait_dma),
1091 #define PREFETCH_FLUSH_CNT 0
1092 #define PREFETCH_FLUSH
1096 ** Script fragments which are loaded into the on-chip RAM
1097 ** of 825A, 875 and 895 chips.
1101 ncrcmd startpos [ 1];
1103 ncrcmd select2 [ 9 + PREFETCH_FLUSH_CNT];
1104 ncrcmd loadpos [ 4];
1105 ncrcmd send_ident [ 9];
1106 ncrcmd prepare [ 6];
1107 ncrcmd prepare2 [ 7];
1108 ncrcmd command [ 6];
1109 ncrcmd dispatch [ 32];
1111 ncrcmd no_data [ 17];
1114 ncrcmd msg_in2 [ 16];
1115 ncrcmd msg_bad [ 4];
1117 ncrcmd cleanup [ 6];
1118 ncrcmd complete [ 9];
1119 ncrcmd cleanup_ok [ 8 + PREFETCH_FLUSH_CNT];
1120 ncrcmd cleanup0 [ 1];
1121 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
1122 ncrcmd signal [ 12];
1125 ncrcmd done_pos [ 1];
1126 ncrcmd done_plug [ 2];
1127 ncrcmd done_end [ 7];
1129 ncrcmd save_dp [ 7];
1130 ncrcmd restore_dp [ 5];
1131 ncrcmd disconnect [ 10];
1132 ncrcmd msg_out [ 9];
1133 ncrcmd msg_out_done [ 7];
1135 ncrcmd reselect [ 8];
1136 ncrcmd reselected [ 8];
1137 ncrcmd resel_dsa [ 6 + PREFETCH_FLUSH_CNT];
1138 ncrcmd loadpos1 [ 4];
1139 ncrcmd resel_lun [ 6];
1140 ncrcmd resel_tag [ 6];
1141 ncrcmd jump_to_nexus [ 4 + PREFETCH_FLUSH_CNT];
1142 ncrcmd nexus_indirect [ 4];
1143 ncrcmd resel_notag [ 4];
1144 ncrcmd data_in [MAX_SCATTERL * 4];
1145 ncrcmd data_in2 [ 4];
1146 ncrcmd data_out [MAX_SCATTERL * 4];
1147 ncrcmd data_out2 [ 4];
1151 ** Script fragments which stay in main memory for all chips.
1154 ncrcmd tryloop [MAX_START*2];
1155 ncrcmd tryloop2 [ 2];
1156 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
1157 ncrcmd done_queue [MAX_DONE*5];
1158 ncrcmd done_queue2 [ 2];
1160 ncrcmd select_no_atn [ 8];
1162 ncrcmd skip [ 9 + PREFETCH_FLUSH_CNT];
1164 ncrcmd par_err_data_in [ 6];
1165 ncrcmd par_err_other [ 4];
1166 ncrcmd msg_reject [ 8];
1167 ncrcmd msg_ign_residue [ 24];
1168 ncrcmd msg_extended [ 10];
1169 ncrcmd msg_ext_2 [ 10];
1170 ncrcmd msg_wdtr [ 14];
1171 ncrcmd send_wdtr [ 7];
1172 ncrcmd msg_ext_3 [ 10];
1173 ncrcmd msg_sdtr [ 14];
1174 ncrcmd send_sdtr [ 7];
1175 ncrcmd nego_bad_phase [ 4];
1176 ncrcmd msg_out_abort [ 10];
1177 ncrcmd hdata_in [MAX_SCATTERH * 4];
1178 ncrcmd hdata_in2 [ 2];
1179 ncrcmd hdata_out [MAX_SCATTERH * 4];
1180 ncrcmd hdata_out2 [ 2];
1182 ncrcmd aborttag [ 4];
1184 ncrcmd abort_resel [ 20];
1185 ncrcmd resend_ident [ 4];
1186 ncrcmd clratn_go_on [ 3];
1187 ncrcmd nxtdsp_go_on [ 1];
1188 ncrcmd sdata_in [ 8];
1189 ncrcmd data_io [ 18];
1190 ncrcmd bad_identify [ 12];
1191 ncrcmd bad_i_t_l [ 4];
1192 ncrcmd bad_i_t_l_q [ 4];
1193 ncrcmd bad_target [ 8];
1194 ncrcmd bad_status [ 8];
1195 ncrcmd start_ram [ 4 + PREFETCH_FLUSH_CNT];
1196 ncrcmd start_ram0 [ 4];
1197 ncrcmd sto_restart [ 5];
1198 ncrcmd wait_dma [ 2];
1199 ncrcmd snooptest [ 9];
1200 ncrcmd snoopend [ 2];
1203 /*==========================================================
1206 ** Function headers.
1209 **==========================================================
1212 static void ncr_alloc_ccb (struct ncb *np, u_char tn, u_char ln);
1213 static void ncr_complete (struct ncb *np, struct ccb *cp);
1214 static void ncr_exception (struct ncb *np);
1215 static void ncr_free_ccb (struct ncb *np, struct ccb *cp);
1216 static void ncr_init_ccb (struct ncb *np, struct ccb *cp);
1217 static void ncr_init_tcb (struct ncb *np, u_char tn);
1218 static struct lcb * ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln);
1219 static struct lcb * ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev);
1220 static void ncr_getclock (struct ncb *np, int mult);
1221 static void ncr_selectclock (struct ncb *np, u_char scntl3);
1222 static struct ccb *ncr_get_ccb (struct ncb *np, u_char tn, u_char ln);
1223 static void ncr_chip_reset (struct ncb *np, int delay);
1224 static void ncr_init (struct ncb *np, int reset, char * msg, u_long code);
1225 static int ncr_int_sbmc (struct ncb *np);
1226 static int ncr_int_par (struct ncb *np);
1227 static void ncr_int_ma (struct ncb *np);
1228 static void ncr_int_sir (struct ncb *np);
1229 static void ncr_int_sto (struct ncb *np);
1230 static void ncr_negotiate (struct ncb* np, struct tcb* tp);
1231 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr);
1233 static void ncr_script_copy_and_bind
1234 (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len);
1235 static void ncr_script_fill (struct script * scr, struct scripth * scripth);
1236 static int ncr_scatter (struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd);
1237 static void ncr_getsync (struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p);
1238 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer);
1239 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev);
1240 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack);
1241 static int ncr_show_msg (u_char * msg);
1242 static void ncr_print_msg (struct ccb *cp, char *label, u_char *msg);
1243 static int ncr_snooptest (struct ncb *np);
1244 static void ncr_timeout (struct ncb *np);
1245 static void ncr_wakeup (struct ncb *np, u_long code);
1246 static void ncr_wakeup_done (struct ncb *np);
1247 static void ncr_start_next_ccb (struct ncb *np, struct lcb * lp, int maxn);
1248 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp);
1250 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd);
1251 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd);
1252 static void process_waiting_list(struct ncb *np, int sts);
1254 #define remove_from_waiting_list(np, cmd) \
1255 retrieve_from_waiting_list(1, (np), (cmd))
1256 #define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
1257 #define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
1259 static inline char *ncr_name (struct ncb *np)
1261 return np->inst_name;
1265 /*==========================================================
1268 ** Scripts for NCR-Processor.
1270 ** Use ncr_script_bind for binding to physical addresses.
1273 **==========================================================
1275 ** NADDR generates a reference to a field of the controller data.
1276 ** PADDR generates a reference to another part of the script.
1277 ** RADDR generates a reference to a script processor register.
1278 ** FADDR generates a reference to a script processor register
1281 **----------------------------------------------------------
1284 #define RELOC_SOFTC 0x40000000
1285 #define RELOC_LABEL 0x50000000
1286 #define RELOC_REGISTER 0x60000000
1288 #define RELOC_KVAR 0x70000000
1290 #define RELOC_LABELH 0x80000000
1291 #define RELOC_MASK 0xf0000000
1293 #define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
1294 #define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
1295 #define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
1296 #define RADDR(label) (RELOC_REGISTER | REG(label))
1297 #define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
1299 #define KVAR(which) (RELOC_KVAR | (which))
1303 #define SCRIPT_KVAR_JIFFIES (0)
1304 #define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
1305 #define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
1307 * Kernel variables referenced in the scripts.
1308 * THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
1310 static void *script_kvars[] __initdata =
1311 { (void *)&jiffies };
1314 static struct script script0 __initdata = {
1315 /*--------------------------< START >-----------------------*/ {
1317 ** This NOP will be patched with LED ON
1318 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
1325 SCR_FROM_REG (ctest2),
1328 ** Then jump to a certain point in tryloop.
1329 ** Due to the lack of indirect addressing the code
1330 ** is self modifying here.
1333 }/*-------------------------< STARTPOS >--------------------*/,{
1336 }/*-------------------------< SELECT >----------------------*/,{
1338 ** DSA contains the address of a scheduled
1341 ** SCRATCHA contains the address of the script,
1342 ** which starts the next entry.
1344 ** Set Initiator mode.
1346 ** (Target mode is left as an exercise for the reader)
1351 SCR_LOAD_REG (HS_REG, HS_SELECTING),
1355 ** And try to select this target.
1357 SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
1360 }/*-------------------------< SELECT2 >----------------------*/,{
1362 ** Now there are 4 possibilities:
1364 ** (1) The ncr loses arbitration.
1365 ** This is ok, because it will try again,
1366 ** when the bus becomes idle.
1367 ** (But beware of the timeout function!)
1369 ** (2) The ncr is reselected.
1370 ** Then the script processor takes the jump
1371 ** to the RESELECT label.
1373 ** (3) The ncr wins arbitration.
1374 ** Then it will execute SCRIPTS instruction until
1375 ** the next instruction that checks SCSI phase.
1376 ** Then will stop and wait for selection to be
1377 ** complete or selection time-out to occur.
1378 ** As a result the SCRIPTS instructions until
1379 ** LOADPOS + 2 should be executed in parallel with
1380 ** the SCSI core performing selection.
1384 ** The M_REJECT problem seems to be due to a selection
1386 ** Wait immediately for the selection to complete.
1387 ** (2.5x behaves so)
1389 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_OUT)),
1393 ** Next time use the next slot.
1399 ** The ncr doesn't have an indirect load
1400 ** or store command. So we have to
1401 ** copy part of the control block to a
1402 ** fixed place, where we can access it.
1404 ** We patch the address part of a
1405 ** COPY command with the DSA-register.
1411 ** Flush script prefetch if required
1415 ** then we do the actual copy.
1417 SCR_COPY (sizeof (struct head)),
1419 ** continued after the next label ...
1421 }/*-------------------------< LOADPOS >---------------------*/,{
1425 ** Wait for the next phase or the selection
1426 ** to complete or time-out.
1428 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
1431 }/*-------------------------< SEND_IDENT >----------------------*/,{
1433 ** Selection complete.
1434 ** Send the IDENTIFY and SIMPLE_TAG messages
1435 ** (and the M_X_SYNC_REQ message)
1437 SCR_MOVE_TBL ^ SCR_MSG_OUT,
1438 offsetof (struct dsb, smsg),
1439 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
1440 PADDRH (resend_ident),
1441 SCR_LOAD_REG (scratcha, 0x80),
1446 }/*-------------------------< PREPARE >----------------------*/,{
1448 ** load the savep (saved pointer) into
1449 ** the TEMP register (actual pointer)
1452 NADDR (header.savep),
1455 ** Initialize the status registers
1458 NADDR (header.status),
1460 }/*-------------------------< PREPARE2 >---------------------*/,{
1462 ** Initialize the msgout buffer with a NOOP message.
1464 SCR_LOAD_REG (scratcha, M_NOOP),
1475 ** Anticipate the COMMAND phase.
1476 ** This is the normal case for initial selection.
1478 SCR_JUMP ^ IFFALSE (WHEN (SCR_COMMAND)),
1481 }/*-------------------------< COMMAND >--------------------*/,{
1483 ** ... and send the command
1485 SCR_MOVE_TBL ^ SCR_COMMAND,
1486 offsetof (struct dsb, cmd),
1488 ** If status is still HS_NEGOTIATE, negotiation failed.
1489 ** We check this here, since we want to do that
1492 SCR_FROM_REG (HS_REG),
1494 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
1497 }/*-----------------------< DISPATCH >----------------------*/,{
1499 ** MSG_IN is the only phase that shall be
1500 ** entered at least once for each (re)selection.
1501 ** So we test it first.
1503 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)),
1506 SCR_RETURN ^ IFTRUE (IF (SCR_DATA_OUT)),
1509 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
1510 ** Possible data corruption during Memory Write and Invalidate.
1511 ** This work-around resets the addressing logic prior to the
1512 ** start of the first MOVE of a DATA IN phase.
1513 ** (See Documentation/scsi/ncr53c8xx.txt for more information)
1515 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
1522 SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
1524 SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
1526 SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
1529 ** Discard one illegal phase byte, if required.
1531 SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
1536 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
1538 SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
1540 SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
1542 SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
1547 }/*-------------------------< CLRACK >----------------------*/,{
1549 ** Terminate possible pending message phase.
1556 }/*-------------------------< NO_DATA >--------------------*/,{
1558 ** The target wants to tranfer too much data
1559 ** or in the wrong direction.
1560 ** Remember that in extended error.
1562 SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
1568 ** Discard one data byte, if required.
1570 SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
1572 SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
1574 SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
1576 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
1579 ** .. and repeat as required.
1586 }/*-------------------------< STATUS >--------------------*/,{
1590 SCR_MOVE_ABS (1) ^ SCR_STATUS,
1593 ** save status to scsi_status.
1594 ** mark as complete.
1596 SCR_TO_REG (SS_REG),
1598 SCR_LOAD_REG (HS_REG, HS_COMPLETE),
1602 }/*-------------------------< MSG_IN >--------------------*/,{
1604 ** Get the first byte of the message
1605 ** and save it to SCRATCHA.
1607 ** The script processor doesn't negate the
1608 ** ACK signal after this transfer.
1610 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
1612 }/*-------------------------< MSG_IN2 >--------------------*/,{
1614 ** Handle this message.
1616 SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
1618 SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
1620 SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
1622 SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
1624 SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
1625 PADDRH (msg_extended),
1626 SCR_JUMP ^ IFTRUE (DATA (M_NOOP)),
1628 SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
1629 PADDRH (msg_reject),
1630 SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)),
1631 PADDRH (msg_ign_residue),
1633 ** Rest of the messages left as
1636 ** Unimplemented messages:
1637 ** fall through to MSG_BAD.
1639 }/*-------------------------< MSG_BAD >------------------*/,{
1641 ** unimplemented message - reject it.
1645 SCR_LOAD_REG (scratcha, M_REJECT),
1647 }/*-------------------------< SETMSG >----------------------*/,{
1655 }/*-------------------------< CLEANUP >-------------------*/,{
1657 ** dsa: Pointer to ccb
1658 ** or xxxxxxFF (no ccb)
1660 ** HS_REG: Host-Status (<>0!)
1664 SCR_JUMP ^ IFTRUE (DATA (0xff)),
1668 ** complete the cleanup.
1673 }/*-------------------------< COMPLETE >-----------------*/,{
1675 ** Complete message.
1677 ** Copy TEMP register to LASTP in header.
1681 NADDR (header.lastp),
1683 ** When we terminate the cycle by clearing ACK,
1684 ** the target may disconnect immediately.
1686 ** We don't want to be told of an
1687 ** "unexpected disconnect",
1688 ** so we disable this feature.
1690 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
1693 ** Terminate cycle ...
1695 SCR_CLR (SCR_ACK|SCR_ATN),
1698 ** ... and wait for the disconnect.
1702 }/*-------------------------< CLEANUP_OK >----------------*/,{
1704 ** Save host status to header.
1708 NADDR (header.status),
1710 ** and copy back the header to the ccb.
1716 ** Flush script prefetch if required
1719 SCR_COPY (sizeof (struct head)),
1721 }/*-------------------------< CLEANUP0 >--------------------*/,{
1723 }/*-------------------------< SIGNAL >----------------------*/,{
1725 ** if job not completed ...
1727 SCR_FROM_REG (HS_REG),
1730 ** ... start the next command.
1732 SCR_JUMP ^ IFTRUE (MASK (0, (HS_DONEMASK|HS_SKIPMASK))),
1735 ** If command resulted in not GOOD status,
1736 ** call the C code if needed.
1738 SCR_FROM_REG (SS_REG),
1740 SCR_CALL ^ IFFALSE (DATA (S_GOOD)),
1741 PADDRH (bad_status),
1743 #ifndef SCSI_NCR_CCB_DONE_SUPPORT
1746 ** ... signal completion to the host
1751 ** Auf zu neuen Schandtaten!
1756 #else /* defined SCSI_NCR_CCB_DONE_SUPPORT */
1759 ** ... signal completion to the host
1762 }/*------------------------< DONE_POS >---------------------*/,{
1763 PADDRH (done_queue),
1764 }/*------------------------< DONE_PLUG >--------------------*/,{
1767 }/*------------------------< DONE_END >---------------------*/,{
1776 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
1778 }/*-------------------------< SAVE_DP >------------------*/,{
1781 ** Copy TEMP register to SAVEP in header.
1785 NADDR (header.savep),
1790 }/*-------------------------< RESTORE_DP >---------------*/,{
1792 ** RESTORE_DP message:
1793 ** Copy SAVEP in header to TEMP register.
1796 NADDR (header.savep),
1801 }/*-------------------------< DISCONNECT >---------------*/,{
1803 ** DISCONNECTing ...
1805 ** disable the "unexpected disconnect" feature,
1806 ** and remove the ACK signal.
1808 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
1810 SCR_CLR (SCR_ACK|SCR_ATN),
1813 ** Wait for the disconnect.
1818 ** Status is: DISCONNECTED.
1820 SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
1825 }/*-------------------------< MSG_OUT >-------------------*/,{
1827 ** The target requests a message.
1829 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
1835 ** If it was no ABORT message ...
1837 SCR_JUMP ^ IFTRUE (DATA (M_ABORT)),
1838 PADDRH (msg_out_abort),
1840 ** ... wait for the next phase
1841 ** if it's a message out, send it again, ...
1843 SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
1845 }/*-------------------------< MSG_OUT_DONE >--------------*/,{
1847 ** ... else clear the message ...
1849 SCR_LOAD_REG (scratcha, M_NOOP),
1855 ** ... and process the next phase
1859 }/*-------------------------< IDLE >------------------------*/,{
1862 ** Wait for reselect.
1863 ** This NOP will be patched with LED OFF
1864 ** SCR_REG_REG (gpreg, SCR_OR, 0x01)
1868 }/*-------------------------< RESELECT >--------------------*/,{
1870 ** make the DSA invalid.
1872 SCR_LOAD_REG (dsa, 0xff),
1876 SCR_LOAD_REG (HS_REG, HS_IN_RESELECT),
1879 ** Sleep waiting for a reselection.
1880 ** If SIGP is set, special treatment.
1882 ** Zu allem bereit ..
1886 }/*-------------------------< RESELECTED >------------------*/,{
1888 ** This NOP will be patched with LED ON
1889 ** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
1894 ** ... zu nichts zu gebrauchen ?
1896 ** load the target id into the SFBR
1897 ** and jump to the control block.
1899 ** Look at the declarations of
1904 ** to understand what's going on.
1906 SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
1913 }/*-------------------------< RESEL_DSA >-------------------*/,{
1915 ** Ack the IDENTIFY or TAG previously received.
1920 ** The ncr doesn't have an indirect load
1921 ** or store command. So we have to
1922 ** copy part of the control block to a
1923 ** fixed place, where we can access it.
1925 ** We patch the address part of a
1926 ** COPY command with the DSA-register.
1932 ** Flush script prefetch if required
1936 ** then we do the actual copy.
1938 SCR_COPY (sizeof (struct head)),
1940 ** continued after the next label ...
1943 }/*-------------------------< LOADPOS1 >-------------------*/,{
1947 ** The DSA contains the data structure address.
1952 }/*-------------------------< RESEL_LUN >-------------------*/,{
1954 ** come back to this point
1955 ** to get an IDENTIFY message
1956 ** Wait for a msg_in phase.
1958 SCR_INT ^ IFFALSE (WHEN (SCR_MSG_IN)),
1959 SIR_RESEL_NO_MSG_IN,
1962 ** Read the data directly from the BUS DATA lines.
1963 ** This helps to support very old SCSI devices that
1964 ** may reselect without sending an IDENTIFY.
1966 SCR_FROM_REG (sbdl),
1969 ** It should be an Identify message.
1973 }/*-------------------------< RESEL_TAG >-------------------*/,{
1975 ** Read IDENTIFY + SIMPLE + TAG using a single MOVE.
1976 ** Agressive optimization, is'nt it?
1977 ** No need to test the SIMPLE TAG message, since the
1978 ** driver only supports conformant devices for tags. ;-)
1980 SCR_MOVE_ABS (3) ^ SCR_MSG_IN,
1983 ** Read the TAG from the SIDL.
1984 ** Still an aggressive optimization. ;-)
1985 ** Compute the CCB indirect jump address which
1986 ** is (#TAG*2 & 0xfc) due to tag numbering using
1987 ** 1,3,5..MAXTAGS*2+1 actual values.
1989 SCR_REG_SFBR (sidl, SCR_SHL, 0),
1991 SCR_SFBR_REG (temp, SCR_AND, 0xfc),
1993 }/*-------------------------< JUMP_TO_NEXUS >-------------------*/,{
1996 PADDR (nexus_indirect),
1998 ** Flush script prefetch if required
2002 }/*-------------------------< NEXUS_INDIRECT >-------------------*/,{
2007 }/*-------------------------< RESEL_NOTAG >-------------------*/,{
2010 ** Read an throw away the IDENTIFY.
2012 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2015 PADDR (jump_to_nexus),
2016 }/*-------------------------< DATA_IN >--------------------*/,{
2018 ** Because the size depends on the
2019 ** #define MAX_SCATTERL parameter,
2020 ** it is filled in at runtime.
2022 ** ##===========< i=0; i<MAX_SCATTERL >=========
2023 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2024 ** || PADDR (dispatch),
2025 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2026 ** || offsetof (struct dsb, data[ i]),
2027 ** ##==========================================
2029 **---------------------------------------------------------
2032 }/*-------------------------< DATA_IN2 >-------------------*/,{
2037 }/*-------------------------< DATA_OUT >--------------------*/,{
2039 ** Because the size depends on the
2040 ** #define MAX_SCATTERL parameter,
2041 ** it is filled in at runtime.
2043 ** ##===========< i=0; i<MAX_SCATTERL >=========
2044 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2045 ** || PADDR (dispatch),
2046 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2047 ** || offsetof (struct dsb, data[ i]),
2048 ** ##==========================================
2050 **---------------------------------------------------------
2053 }/*-------------------------< DATA_OUT2 >-------------------*/,{
2058 }/*--------------------------------------------------------*/
2061 static struct scripth scripth0 __initdata = {
2062 /*-------------------------< TRYLOOP >---------------------*/{
2064 ** Start the next entry.
2065 ** Called addresses point to the launch script in the CCB.
2066 ** They are patched by the main processor.
2068 ** Because the size depends on the
2069 ** #define MAX_START parameter, it is filled
2072 **-----------------------------------------------------------
2074 ** ##===========< I=0; i<MAX_START >===========
2077 ** ##==========================================
2079 **-----------------------------------------------------------
2082 }/*------------------------< TRYLOOP2 >---------------------*/,{
2086 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2088 }/*------------------------< DONE_QUEUE >-------------------*/,{
2090 ** Copy the CCB address to the next done entry.
2091 ** Because the size depends on the
2092 ** #define MAX_DONE parameter, it is filled
2095 **-----------------------------------------------------------
2097 ** ##===========< I=0; i<MAX_DONE >===========
2098 ** || SCR_COPY (sizeof(struct ccb *),
2099 ** || NADDR (header.cp),
2100 ** || NADDR (ccb_done[i]),
2102 ** || PADDR (done_end),
2103 ** ##==========================================
2105 **-----------------------------------------------------------
2108 }/*------------------------< DONE_QUEUE2 >------------------*/,{
2110 PADDRH (done_queue),
2112 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2113 }/*------------------------< SELECT_NO_ATN >-----------------*/,{
2115 ** Set Initiator mode.
2116 ** And try to select this target without ATN.
2121 SCR_LOAD_REG (HS_REG, HS_SELECTING),
2123 SCR_SEL_TBL ^ offsetof (struct dsb, select),
2128 }/*-------------------------< CANCEL >------------------------*/,{
2130 SCR_LOAD_REG (scratcha, HS_ABORTED),
2134 }/*-------------------------< SKIP >------------------------*/,{
2135 SCR_LOAD_REG (scratcha, 0),
2138 ** This entry has been canceled.
2139 ** Next time use the next slot.
2145 ** The ncr doesn't have an indirect load
2146 ** or store command. So we have to
2147 ** copy part of the control block to a
2148 ** fixed place, where we can access it.
2150 ** We patch the address part of a
2151 ** COPY command with the DSA-register.
2157 ** Flush script prefetch if required
2161 ** then we do the actual copy.
2163 SCR_COPY (sizeof (struct head)),
2165 ** continued after the next label ...
2167 }/*-------------------------< SKIP2 >---------------------*/,{
2171 ** Initialize the status registers
2174 NADDR (header.status),
2177 ** Force host status.
2179 SCR_FROM_REG (scratcha),
2181 SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
2183 SCR_REG_REG (HS_REG, SCR_OR, HS_SKIPMASK),
2187 SCR_TO_REG (HS_REG),
2189 SCR_LOAD_REG (SS_REG, S_GOOD),
2194 },/*-------------------------< PAR_ERR_DATA_IN >---------------*/{
2196 ** Ignore all data in byte, until next phase
2198 SCR_JUMP ^ IFFALSE (WHEN (SCR_DATA_IN)),
2199 PADDRH (par_err_other),
2200 SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
2204 },/*-------------------------< PAR_ERR_OTHER >------------------*/{
2208 SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
2211 ** jump to dispatcher.
2215 }/*-------------------------< MSG_REJECT >---------------*/,{
2217 ** If a negotiation was in progress,
2218 ** negotiation failed.
2219 ** Otherwise, let the C code print
2222 SCR_FROM_REG (HS_REG),
2224 SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
2225 SIR_REJECT_RECEIVED,
2226 SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
2231 }/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
2237 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2240 ** get residue size.
2242 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2245 ** Size is 0 .. ignore message.
2247 SCR_JUMP ^ IFTRUE (DATA (0)),
2250 ** Size is not 1 .. have to interrupt.
2252 SCR_JUMPR ^ IFFALSE (DATA (1)),
2255 ** Check for residue byte in swide register
2257 SCR_FROM_REG (scntl2),
2259 SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
2262 ** There IS data in the swide register.
2265 SCR_REG_REG (scntl2, SCR_OR, WSR),
2270 ** Load again the size to the sfbr register.
2272 SCR_FROM_REG (scratcha),
2279 }/*-------------------------< MSG_EXTENDED >-------------*/,{
2285 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2290 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2294 SCR_JUMP ^ IFTRUE (DATA (3)),
2296 SCR_JUMP ^ IFFALSE (DATA (2)),
2298 }/*-------------------------< MSG_EXT_2 >----------------*/,{
2301 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2304 ** get extended message code.
2306 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2308 SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)),
2311 ** unknown extended message
2315 }/*-------------------------< MSG_WDTR >-----------------*/,{
2318 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2321 ** get data bus width
2323 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2326 ** let the host do the real work.
2331 ** let the target fetch our answer.
2337 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2338 PADDRH (nego_bad_phase),
2340 }/*-------------------------< SEND_WDTR >----------------*/,{
2342 ** Send the M_X_WIDE_REQ
2344 SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
2350 PADDR (msg_out_done),
2352 }/*-------------------------< MSG_EXT_3 >----------------*/,{
2355 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2358 ** get extended message code.
2360 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2362 SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)),
2365 ** unknown extended message
2370 }/*-------------------------< MSG_SDTR >-----------------*/,{
2373 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
2376 ** get period and offset
2378 SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
2381 ** let the host do the real work.
2386 ** let the target fetch our answer.
2392 SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_OUT)),
2393 PADDRH (nego_bad_phase),
2395 }/*-------------------------< SEND_SDTR >-------------*/,{
2397 ** Send the M_X_SYNC_REQ
2399 SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
2405 PADDR (msg_out_done),
2407 }/*-------------------------< NEGO_BAD_PHASE >------------*/,{
2413 }/*-------------------------< MSG_OUT_ABORT >-------------*/,{
2415 ** After ABORT message,
2417 ** expect an immediate disconnect, ...
2419 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2421 SCR_CLR (SCR_ACK|SCR_ATN),
2426 ** ... and set the status to "ABORTED"
2428 SCR_LOAD_REG (HS_REG, HS_ABORTED),
2433 }/*-------------------------< HDATA_IN >-------------------*/,{
2435 ** Because the size depends on the
2436 ** #define MAX_SCATTERH parameter,
2437 ** it is filled in at runtime.
2439 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
2440 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2441 ** || PADDR (dispatch),
2442 ** || SCR_MOVE_TBL ^ SCR_DATA_IN,
2443 ** || offsetof (struct dsb, data[ i]),
2444 ** ##===================================================
2446 **---------------------------------------------------------
2449 }/*-------------------------< HDATA_IN2 >------------------*/,{
2453 }/*-------------------------< HDATA_OUT >-------------------*/,{
2455 ** Because the size depends on the
2456 ** #define MAX_SCATTERH parameter,
2457 ** it is filled in at runtime.
2459 ** ##==< i=MAX_SCATTERL; i<MAX_SCATTERL+MAX_SCATTERH >==
2460 ** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
2461 ** || PADDR (dispatch),
2462 ** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
2463 ** || offsetof (struct dsb, data[ i]),
2464 ** ##===================================================
2466 **---------------------------------------------------------
2469 }/*-------------------------< HDATA_OUT2 >------------------*/,{
2473 }/*-------------------------< RESET >----------------------*/,{
2475 ** Send a M_RESET message if bad IDENTIFY
2476 ** received on reselection.
2478 SCR_LOAD_REG (scratcha, M_ABORT_TAG),
2481 PADDRH (abort_resel),
2482 }/*-------------------------< ABORTTAG >-------------------*/,{
2484 ** Abort a wrong tag received on reselection.
2486 SCR_LOAD_REG (scratcha, M_ABORT_TAG),
2489 PADDRH (abort_resel),
2490 }/*-------------------------< ABORT >----------------------*/,{
2492 ** Abort a reselection when no active CCB.
2494 SCR_LOAD_REG (scratcha, M_ABORT),
2496 }/*-------------------------< ABORT_RESEL >----------------*/,{
2506 ** we expect an immediate disconnect
2508 SCR_REG_REG (scntl2, SCR_AND, 0x7f),
2510 SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
2515 SCR_CLR (SCR_ACK|SCR_ATN),
2521 }/*-------------------------< RESEND_IDENT >-------------------*/,{
2523 ** The target stays in MSG OUT phase after having acked
2524 ** Identify [+ Tag [+ Extended message ]]. Targets shall
2525 ** behave this way on parity error.
2526 ** We must send it again all the messages.
2528 SCR_SET (SCR_ATN), /* Shall be asserted 2 deskew delays before the */
2529 0, /* 1rst ACK = 90 ns. Hope the NCR is'nt too fast */
2532 }/*-------------------------< CLRATN_GO_ON >-------------------*/,{
2536 }/*-------------------------< NXTDSP_GO_ON >-------------------*/,{
2538 }/*-------------------------< SDATA_IN >-------------------*/,{
2539 SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
2541 SCR_MOVE_TBL ^ SCR_DATA_IN,
2542 offsetof (struct dsb, sense),
2547 }/*-------------------------< DATA_IO >--------------------*/,{
2549 ** We jump here if the data direction was unknown at the
2550 ** time we had to queue the command to the scripts processor.
2551 ** Pointers had been set as follow in this situation:
2552 ** savep --> DATA_IO
2553 ** lastp --> start pointer when DATA_IN
2554 ** goalp --> goal pointer when DATA_IN
2555 ** wlastp --> start pointer when DATA_OUT
2556 ** wgoalp --> goal pointer when DATA_OUT
2557 ** This script sets savep/lastp/goalp according to the
2558 ** direction chosen by the target.
2560 SCR_JUMPR ^ IFTRUE (WHEN (SCR_DATA_OUT)),
2563 ** Direction is DATA IN.
2564 ** Warning: we jump here, even when phase is DATA OUT.
2567 NADDR (header.lastp),
2568 NADDR (header.savep),
2571 ** Jump to the SCRIPTS according to actual direction.
2574 NADDR (header.savep),
2579 ** Direction is DATA OUT.
2582 NADDR (header.wlastp),
2583 NADDR (header.lastp),
2585 NADDR (header.wgoalp),
2586 NADDR (header.goalp),
2589 }/*-------------------------< BAD_IDENTIFY >---------------*/,{
2591 ** If message phase but not an IDENTIFY,
2592 ** get some help from the C code.
2593 ** Old SCSI device may behave so.
2595 SCR_JUMPR ^ IFTRUE (MASK (0x80, 0x80)),
2598 SIR_RESEL_NO_IDENTIFY,
2602 ** Message is an IDENTIFY, but lun is unknown.
2603 ** Read the message, since we got it directly
2604 ** from the SCSI BUS data lines.
2605 ** Signal problem to C code for logging the event.
2606 ** Send a M_ABORT to clear all pending tasks.
2610 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2614 }/*-------------------------< BAD_I_T_L >------------------*/,{
2616 ** We donnot have a task for that I_T_L.
2617 ** Signal problem to C code for logging the event.
2618 ** Send a M_ABORT message.
2621 SIR_RESEL_BAD_I_T_L,
2624 }/*-------------------------< BAD_I_T_L_Q >----------------*/,{
2626 ** We donnot have a task that matches the tag.
2627 ** Signal problem to C code for logging the event.
2628 ** Send a M_ABORTTAG message.
2631 SIR_RESEL_BAD_I_T_L_Q,
2634 }/*-------------------------< BAD_TARGET >-----------------*/,{
2636 ** We donnot know the target that reselected us.
2637 ** Grab the first message if any (IDENTIFY).
2638 ** Signal problem to C code for logging the event.
2642 SIR_RESEL_BAD_TARGET,
2643 SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
2645 SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
2649 }/*-------------------------< BAD_STATUS >-----------------*/,{
2651 ** If command resulted in either QUEUE FULL,
2652 ** CHECK CONDITION or COMMAND TERMINATED,
2655 SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
2657 SCR_INT ^ IFTRUE (DATA (S_CHECK_COND)),
2659 SCR_INT ^ IFTRUE (DATA (S_TERMINATED)),
2663 }/*-------------------------< START_RAM >-------------------*/,{
2665 ** Load the script into on-chip RAM,
2666 ** and jump to start point.
2670 PADDRH (start_ram0),
2672 ** Flush script prefetch if required
2675 SCR_COPY (sizeof (struct script)),
2676 }/*-------------------------< START_RAM0 >--------------------*/,{
2681 }/*-------------------------< STO_RESTART >-------------------*/,{
2684 ** Repair start queue (e.g. next time use the next slot)
2685 ** and jump to start point.
2692 }/*-------------------------< WAIT_DMA >-------------------*/,{
2694 ** For HP Zalon/53c720 systems, the Zalon interface
2695 ** between CPU and 53c720 does prefetches, which causes
2696 ** problems with self modifying scripts. The problem
2697 ** is overcome by calling a dummy subroutine after each
2698 ** modification, to force a refetch of the script on
2699 ** return from the subroutine.
2703 }/*-------------------------< SNOOPTEST >-------------------*/,{
2705 ** Read the variable.
2711 ** Write the variable.
2717 ** Read back the variable.
2722 }/*-------------------------< SNOOPEND >-------------------*/,{
2728 }/*--------------------------------------------------------*/
2731 /*==========================================================
2734 ** Fill in #define dependent parts of the script
2737 **==========================================================
2740 void __init ncr_script_fill (struct script * scr, struct scripth * scrh)
2746 for (i=0; i<MAX_START; i++) {
2751 BUG_ON((u_long)p != (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
2753 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
2755 p = scrh->done_queue;
2756 for (i = 0; i<MAX_DONE; i++) {
2757 *p++ =SCR_COPY (sizeof(struct ccb *));
2758 *p++ =NADDR (header.cp);
2759 *p++ =NADDR (ccb_done[i]);
2761 *p++ =PADDR (done_end);
2764 BUG_ON((u_long)p != (u_long)&scrh->done_queue+sizeof(scrh->done_queue));
2766 #endif /* SCSI_NCR_CCB_DONE_SUPPORT */
2769 for (i=0; i<MAX_SCATTERH; i++) {
2770 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
2771 *p++ =PADDR (dispatch);
2772 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
2773 *p++ =offsetof (struct dsb, data[i]);
2776 BUG_ON((u_long)p != (u_long)&scrh->hdata_in + sizeof (scrh->hdata_in));
2779 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
2780 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
2781 *p++ =PADDR (dispatch);
2782 *p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
2783 *p++ =offsetof (struct dsb, data[i]);
2786 BUG_ON((u_long)p != (u_long)&scr->data_in + sizeof (scr->data_in));
2788 p = scrh->hdata_out;
2789 for (i=0; i<MAX_SCATTERH; i++) {
2790 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
2791 *p++ =PADDR (dispatch);
2792 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
2793 *p++ =offsetof (struct dsb, data[i]);
2796 BUG_ON((u_long)p != (u_long)&scrh->hdata_out + sizeof (scrh->hdata_out));
2799 for (i=MAX_SCATTERH; i<MAX_SCATTERH+MAX_SCATTERL; i++) {
2800 *p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
2801 *p++ =PADDR (dispatch);
2802 *p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
2803 *p++ =offsetof (struct dsb, data[i]);
2806 BUG_ON((u_long) p != (u_long)&scr->data_out + sizeof (scr->data_out));
2809 /*==========================================================
2812 ** Copy and rebind a script.
2815 **==========================================================
2819 ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len)
2821 ncrcmd opcode, new, old, tmp1, tmp2;
2822 ncrcmd *start, *end;
2832 *dst++ = cpu_to_scr(opcode);
2835 ** If we forget to change the length
2836 ** in struct script, a field will be
2837 ** padded with 0. This is an illegal
2842 printk (KERN_ERR "%s: ERROR0 IN SCRIPT at %d.\n",
2843 ncr_name(np), (int) (src-start-1));
2847 if (DEBUG_FLAGS & DEBUG_SCRIPT)
2848 printk (KERN_DEBUG "%p: <%x>\n",
2849 (src-1), (unsigned)opcode);
2852 ** We don't have to decode ALL commands
2854 switch (opcode >> 28) {
2858 ** COPY has TWO arguments.
2863 if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
2868 if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
2871 if ((tmp1 ^ tmp2) & 3) {
2872 printk (KERN_ERR"%s: ERROR1 IN SCRIPT at %d.\n",
2873 ncr_name(np), (int) (src-start-1));
2877 ** If PREFETCH feature not enabled, remove
2878 ** the NO FLUSH bit if present.
2880 if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
2881 dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
2888 ** MOVE (absolute address)
2896 ** don't relocate if relative :-)
2898 if (opcode & 0x00800000)
2920 switch (old & RELOC_MASK) {
2921 case RELOC_REGISTER:
2922 new = (old & ~RELOC_MASK) + np->paddr;
2925 new = (old & ~RELOC_MASK) + np->p_script;
2928 new = (old & ~RELOC_MASK) + np->p_scripth;
2931 new = (old & ~RELOC_MASK) + np->p_ncb;
2935 if (((old & ~RELOC_MASK) <
2936 SCRIPT_KVAR_FIRST) ||
2937 ((old & ~RELOC_MASK) >
2939 panic("ncr KVAR out of range");
2940 new = vtophys(script_kvars[old &
2945 /* Don't relocate a 0 address. */
2952 panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
2956 *dst++ = cpu_to_scr(new);
2959 *dst++ = cpu_to_scr(*src++);
2965 ** Linux host data structure
2973 ** Print something which allows to retrieve the controller type, unit,
2974 ** target, lun concerned by a kernel message.
2977 static void PRINT_TARGET(struct ncb *np, int target)
2979 printk(KERN_INFO "%s-<%d,*>: ", ncr_name(np), target);
2982 static void PRINT_LUN(struct ncb *np, int target, int lun)
2984 printk(KERN_INFO "%s-<%d,%d>: ", ncr_name(np), target, lun);
2987 static void PRINT_ADDR(struct scsi_cmnd *cmd)
2989 struct host_data *host_data = (struct host_data *) cmd->device->host->hostdata;
2990 PRINT_LUN(host_data->ncb, cmd->device->id, cmd->device->lun);
2993 /*==========================================================
2995 ** NCR chip clock divisor table.
2996 ** Divisors are multiplied by 10,000,000 in order to make
2997 ** calculations more simple.
2999 **==========================================================
3003 static u_long div_10M[] =
3004 {2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
3007 /*===============================================================
3009 ** Prepare io register values used by ncr_init() according
3010 ** to selected and supported features.
3012 ** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
3013 ** transfers. 32,64,128 are only supported by 875 and 895 chips.
3014 ** We use log base 2 (burst length) as internal code, with
3015 ** value 0 meaning "burst disabled".
3017 **===============================================================
3021 * Burst length from burst code.
3023 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
3026 * Burst code from io register bits. Burst enable is ctest0 for c720
3028 #define burst_code(dmode, ctest0) \
3029 (ctest0) & 0x80 ? 0 : (((dmode) & 0xc0) >> 6) + 1
3032 * Set initial io register bits from burst code.
3034 static inline void ncr_init_burst(struct ncb *np, u_char bc)
3036 u_char *be = &np->rv_ctest0;
3038 np->rv_dmode &= ~(0x3 << 6);
3039 np->rv_ctest5 &= ~0x4;
3045 np->rv_dmode |= ((bc & 0x3) << 6);
3046 np->rv_ctest5 |= (bc & 0x4);
3050 static void __init ncr_prepare_setting(struct ncb *np)
3057 ** Save assumed BIOS setting
3060 np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
3061 np->sv_scntl3 = INB(nc_scntl3) & 0x07;
3062 np->sv_dmode = INB(nc_dmode) & 0xce;
3063 np->sv_dcntl = INB(nc_dcntl) & 0xa8;
3064 np->sv_ctest0 = INB(nc_ctest0) & 0x84;
3065 np->sv_ctest3 = INB(nc_ctest3) & 0x01;
3066 np->sv_ctest4 = INB(nc_ctest4) & 0x80;
3067 np->sv_ctest5 = INB(nc_ctest5) & 0x24;
3068 np->sv_gpcntl = INB(nc_gpcntl);
3069 np->sv_stest2 = INB(nc_stest2) & 0x20;
3070 np->sv_stest4 = INB(nc_stest4);
3076 np->maxwide = (np->features & FE_WIDE)? 1 : 0;
3079 * Guess the frequency of the chip's clock.
3081 if (np->features & FE_ULTRA)
3082 np->clock_khz = 80000;
3084 np->clock_khz = 40000;
3087 * Get the clock multiplier factor.
3089 if (np->features & FE_QUAD)
3091 else if (np->features & FE_DBLR)
3097 * Measure SCSI clock frequency for chips
3098 * it may vary from assumed one.
3100 if (np->features & FE_VARCLK)
3101 ncr_getclock(np, np->multiplier);
3104 * Divisor to be used for async (timer pre-scaler).
3106 i = np->clock_divn - 1;
3108 if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
3113 np->rv_scntl3 = i+1;
3116 * Minimum synchronous period factor supported by the chip.
3117 * Btw, 'period' is in tenths of nanoseconds.
3120 period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
3121 if (period <= 250) np->minsync = 10;
3122 else if (period <= 303) np->minsync = 11;
3123 else if (period <= 500) np->minsync = 12;
3124 else np->minsync = (period + 40 - 1) / 40;
3127 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
3130 if (np->minsync < 25 && !(np->features & FE_ULTRA))
3134 * Maximum synchronous period factor supported by the chip.
3137 period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
3138 np->maxsync = period > 2540 ? 254 : period / 10;
3141 ** Prepare initial value of other IO registers
3143 #if defined SCSI_NCR_TRUST_BIOS_SETTING
3144 np->rv_scntl0 = np->sv_scntl0;
3145 np->rv_dmode = np->sv_dmode;
3146 np->rv_dcntl = np->sv_dcntl;
3147 np->rv_ctest0 = np->sv_ctest0;
3148 np->rv_ctest3 = np->sv_ctest3;
3149 np->rv_ctest4 = np->sv_ctest4;
3150 np->rv_ctest5 = np->sv_ctest5;
3151 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3155 ** Select burst length (dwords)
3157 burst_max = driver_setup.burst_max;
3158 if (burst_max == 255)
3159 burst_max = burst_code(np->sv_dmode, np->sv_ctest0);
3162 if (burst_max > np->maxburst)
3163 burst_max = np->maxburst;
3166 ** Select all supported special features
3168 if (np->features & FE_ERL)
3169 np->rv_dmode |= ERL; /* Enable Read Line */
3170 if (np->features & FE_BOF)
3171 np->rv_dmode |= BOF; /* Burst Opcode Fetch */
3172 if (np->features & FE_ERMP)
3173 np->rv_dmode |= ERMP; /* Enable Read Multiple */
3174 if (np->features & FE_PFEN)
3175 np->rv_dcntl |= PFEN; /* Prefetch Enable */
3176 if (np->features & FE_CLSE)
3177 np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
3178 if (np->features & FE_WRIE)
3179 np->rv_ctest3 |= WRIE; /* Write and Invalidate */
3180 if (np->features & FE_DFS)
3181 np->rv_ctest5 |= DFS; /* Dma Fifo Size */
3182 if (np->features & FE_MUX)
3183 np->rv_ctest4 |= MUX; /* Host bus multiplex mode */
3184 if (np->features & FE_EA)
3185 np->rv_dcntl |= EA; /* Enable ACK */
3186 if (np->features & FE_EHP)
3187 np->rv_ctest0 |= EHP; /* Even host parity */
3190 ** Select some other
3192 if (driver_setup.master_parity)
3193 np->rv_ctest4 |= MPEE; /* Master parity checking */
3194 if (driver_setup.scsi_parity)
3195 np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
3198 ** Get SCSI addr of host adapter (set by bios?).
3200 if (np->myaddr == 255) {
3201 np->myaddr = INB(nc_scid) & 0x07;
3203 np->myaddr = SCSI_NCR_MYADDR;
3206 #endif /* SCSI_NCR_TRUST_BIOS_SETTING */
3209 * Prepare initial io register bits for burst length
3211 ncr_init_burst(np, burst_max);
3214 ** Set SCSI BUS mode.
3216 ** - ULTRA2 chips (895/895A/896) report the current
3217 ** BUS mode through the STEST4 IO register.
3218 ** - For previous generation chips (825/825A/875),
3219 ** user has to tell us how to check against HVD,
3220 ** since a 100% safe algorithm is not possible.
3222 np->scsi_mode = SMODE_SE;
3223 if (np->features & FE_DIFF) {
3224 switch(driver_setup.diff_support) {
3225 case 4: /* Trust previous settings if present, then GPIO3 */
3226 if (np->sv_scntl3) {
3227 if (np->sv_stest2 & 0x20)
3228 np->scsi_mode = SMODE_HVD;
3231 case 3: /* SYMBIOS controllers report HVD through GPIO3 */
3232 if (INB(nc_gpreg) & 0x08)
3234 case 2: /* Set HVD unconditionally */
3235 np->scsi_mode = SMODE_HVD;
3236 case 1: /* Trust previous settings for HVD */
3237 if (np->sv_stest2 & 0x20)
3238 np->scsi_mode = SMODE_HVD;
3240 default:/* Don't care about HVD */
3244 if (np->scsi_mode == SMODE_HVD)
3245 np->rv_stest2 |= 0x20;
3248 ** Set LED support from SCRIPTS.
3249 ** Ignore this feature for boards known to use a
3250 ** specific GPIO wiring and for the 895A or 896
3251 ** that drive the LED directly.
3252 ** Also probe initial setting of GPIO0 as output.
3254 if ((driver_setup.led_pin) &&
3255 !(np->features & FE_LEDC) && !(np->sv_gpcntl & 0x01))
3256 np->features |= FE_LED0;
3261 switch(driver_setup.irqm & 3) {
3263 np->rv_dcntl |= IRQM;
3266 np->rv_dcntl |= (np->sv_dcntl & IRQM);
3273 ** Configure targets according to driver setup.
3274 ** Allow to override sync, wide and NOSCAN from
3275 ** boot command line.
3277 for (i = 0 ; i < MAX_TARGET ; i++) {
3278 struct tcb *tp = &np->target[i];
3280 tp->usrsync = driver_setup.default_sync;
3281 tp->usrwide = driver_setup.max_wide;
3282 tp->usrtags = MAX_TAGS;
3283 if (!driver_setup.disconnection)
3284 np->target[i].usrflag = UF_NODISC;
3288 ** Announce all that stuff to user.
3291 printk(KERN_INFO "%s: ID %d, Fast-%d%s%s\n", ncr_name(np),
3293 np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
3294 (np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
3295 (np->rv_stest2 & 0x20) ? ", Differential" : "");
3297 if (bootverbose > 1) {
3298 printk (KERN_INFO "%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3299 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3300 ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
3301 np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
3303 printk (KERN_INFO "%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
3304 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
3305 ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
3306 np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
3309 if (bootverbose && np->paddr2)
3310 printk (KERN_INFO "%s: on-chip RAM at 0x%lx\n",
3311 ncr_name(np), np->paddr2);
3314 /*==========================================================
3317 ** Done SCSI commands list management.
3319 ** We donnot enter the scsi_done() callback immediately
3320 ** after a command has been seen as completed but we
3321 ** insert it into a list which is flushed outside any kind
3322 ** of driver critical section.
3323 ** This allows to do minimal stuff under interrupt and
3324 ** inside critical sections and to also avoid locking up
3325 ** on recursive calls to driver entry points under SMP.
3326 ** In fact, the only kernel point which is entered by the
3327 ** driver with a driver lock set is kmalloc(GFP_ATOMIC)
3328 ** that shall not reenter the driver under any circumstances,
3331 **==========================================================
3333 static inline void ncr_queue_done_cmd(struct ncb *np, struct scsi_cmnd *cmd)
3335 unmap_scsi_data(np, cmd);
3336 cmd->host_scribble = (char *) np->done_list;
3337 np->done_list = cmd;
3340 static inline void ncr_flush_done_cmds(struct scsi_cmnd *lcmd)
3342 struct scsi_cmnd *cmd;
3346 lcmd = (struct scsi_cmnd *) cmd->host_scribble;
3347 cmd->scsi_done(cmd);
3351 /*==========================================================
3354 ** Prepare the next negotiation message if needed.
3356 ** Fill in the part of message buffer that contains the
3357 ** negotiation and the nego_status field of the CCB.
3358 ** Returns the size of the message in bytes.
3361 **==========================================================
3365 static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr)
3367 struct tcb *tp = &np->target[cp->target];
3370 struct scsi_target *starget = tp->starget;
3372 if (likely(starget)) {
3375 ** negotiate wide transfers ?
3378 if (!tp->widedone) {
3379 if (spi_support_wide(starget)) {
3387 ** negotiate synchronous transfers?
3390 if (!nego && !tp->period) {
3391 if (spi_support_sync(starget)) {
3395 PRINT_TARGET(np, cp->target);
3396 printk ("target did not report SYNC.\n");
3403 msgptr[msglen++] = M_EXTENDED;
3404 msgptr[msglen++] = 3;
3405 msgptr[msglen++] = M_X_SYNC_REQ;
3406 msgptr[msglen++] = tp->maxoffs ? tp->minsync : 0;
3407 msgptr[msglen++] = tp->maxoffs;
3410 msgptr[msglen++] = M_EXTENDED;
3411 msgptr[msglen++] = 2;
3412 msgptr[msglen++] = M_X_WIDE_REQ;
3413 msgptr[msglen++] = tp->usrwide;
3417 cp->nego_status = nego;
3421 if (DEBUG_FLAGS & DEBUG_NEGO) {
3422 ncr_print_msg(cp, nego == NS_WIDE ?
3423 "wide msgout":"sync_msgout", msgptr);
3432 /*==========================================================
3435 ** Start execution of a SCSI command.
3436 ** This is called from the generic SCSI driver.
3439 **==========================================================
3441 static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd)
3443 /* struct scsi_device *device = cmd->device; */
3444 struct tcb *tp = &np->target[cmd->device->id];
3445 struct lcb *lp = tp->lp[cmd->device->lun];
3449 u_char idmsg, *msgptr;
3454 /*---------------------------------------------
3456 ** Some shortcuts ...
3458 **---------------------------------------------
3460 if ((cmd->device->id == np->myaddr ) ||
3461 (cmd->device->id >= MAX_TARGET) ||
3462 (cmd->device->lun >= MAX_LUN )) {
3463 return(DID_BAD_TARGET);
3466 /*---------------------------------------------
3468 ** Complete the 1st TEST UNIT READY command
3469 ** with error condition if the device is
3470 ** flagged NOSCAN, in order to speed up
3473 **---------------------------------------------
3475 if ((cmd->cmnd[0] == 0 || cmd->cmnd[0] == 0x12) &&
3476 (tp->usrflag & UF_NOSCAN)) {
3477 tp->usrflag &= ~UF_NOSCAN;
3478 return DID_BAD_TARGET;
3481 if (DEBUG_FLAGS & DEBUG_TINY) {
3483 printk ("CMD=%x ", cmd->cmnd[0]);
3486 /*---------------------------------------------------
3488 ** Assign a ccb / bind cmd.
3489 ** If resetting, shorten settle_time if necessary
3490 ** in order to avoid spurious timeouts.
3491 ** If resetting or no free ccb,
3492 ** insert cmd into the waiting list.
3494 **----------------------------------------------------
3496 if (np->settle_time && cmd->timeout_per_command >= HZ) {
3497 u_long tlimit = ktime_get(cmd->timeout_per_command - HZ);
3498 if (ktime_dif(np->settle_time, tlimit) > 0)
3499 np->settle_time = tlimit;
3502 if (np->settle_time || !(cp=ncr_get_ccb (np, cmd->device->id, cmd->device->lun))) {
3503 insert_into_waiting_list(np, cmd);
3508 /*----------------------------------------------------
3510 ** Build the identify / tag / sdtr message
3512 **----------------------------------------------------
3515 idmsg = M_IDENTIFY | cmd->device->lun;
3517 if (cp ->tag != NO_TAG ||
3518 (cp != np->ccb && np->disc && !(tp->usrflag & UF_NODISC)))
3521 msgptr = cp->scsi_smsg;
3523 msgptr[msglen++] = idmsg;
3525 if (cp->tag != NO_TAG) {
3526 char order = np->order;
3529 ** Force ordered tag if necessary to avoid timeouts
3530 ** and to preserve interactivity.
3532 if (lp && ktime_exp(lp->tags_stime)) {
3533 if (lp->tags_smap) {
3534 order = M_ORDERED_TAG;
3535 if ((DEBUG_FLAGS & DEBUG_TAGS)||bootverbose>2){
3537 printk("ordered tag forced.\n");
3540 lp->tags_stime = ktime_get(3*HZ);
3541 lp->tags_smap = lp->tags_umap;
3546 ** Ordered write ops, unordered read ops.
3548 switch (cmd->cmnd[0]) {
3549 case 0x08: /* READ_SMALL (6) */
3550 case 0x28: /* READ_BIG (10) */
3551 case 0xa8: /* READ_HUGE (12) */
3552 order = M_SIMPLE_TAG;
3555 order = M_ORDERED_TAG;
3558 msgptr[msglen++] = order;
3560 ** Actual tags are numbered 1,3,5,..2*MAXTAGS+1,
3561 ** since we may have to deal with devices that have
3562 ** problems with #TAG 0 or too great #TAG numbers.
3564 msgptr[msglen++] = (cp->tag << 1) + 1;
3567 /*----------------------------------------------------
3569 ** Build the data descriptors
3571 **----------------------------------------------------
3574 direction = cmd->sc_data_direction;
3575 if (direction != DMA_NONE) {
3576 segments = ncr_scatter(np, cp, cp->cmd);
3578 ncr_free_ccb(np, cp);
3587 /*---------------------------------------------------
3589 ** negotiation required?
3591 ** (nego_status is filled by ncr_prepare_nego())
3593 **---------------------------------------------------
3596 cp->nego_status = 0;
3598 if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
3599 msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
3602 /*----------------------------------------------------
3604 ** Determine xfer direction.
3606 **----------------------------------------------------
3609 direction = DMA_NONE;
3612 ** If data direction is BIDIRECTIONAL, speculate FROM_DEVICE
3613 ** but prepare alternate pointers for TO_DEVICE in case
3614 ** of our speculation will be just wrong.
3615 ** SCRIPTS will swap values if needed.
3618 case DMA_BIDIRECTIONAL:
3620 goalp = NCB_SCRIPT_PHYS (np, data_out2) + 8;
3621 if (segments <= MAX_SCATTERL)
3622 lastp = goalp - 8 - (segments * 16);
3624 lastp = NCB_SCRIPTH_PHYS (np, hdata_out2);
3625 lastp -= (segments - MAX_SCATTERL) * 16;
3627 if (direction != DMA_BIDIRECTIONAL)
3629 cp->phys.header.wgoalp = cpu_to_scr(goalp);
3630 cp->phys.header.wlastp = cpu_to_scr(lastp);
3632 case DMA_FROM_DEVICE:
3633 goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
3634 if (segments <= MAX_SCATTERL)
3635 lastp = goalp - 8 - (segments * 16);
3637 lastp = NCB_SCRIPTH_PHYS (np, hdata_in2);
3638 lastp -= (segments - MAX_SCATTERL) * 16;
3643 lastp = goalp = NCB_SCRIPT_PHYS (np, no_data);
3648 ** Set all pointers values needed by SCRIPTS.
3649 ** If direction is unknown, start at data_io.
3651 cp->phys.header.lastp = cpu_to_scr(lastp);
3652 cp->phys.header.goalp = cpu_to_scr(goalp);
3654 if (direction == DMA_BIDIRECTIONAL)
3655 cp->phys.header.savep =
3656 cpu_to_scr(NCB_SCRIPTH_PHYS (np, data_io));
3658 cp->phys.header.savep= cpu_to_scr(lastp);
3661 ** Save the initial data pointer in order to be able
3662 ** to redo the command.
3664 cp->startp = cp->phys.header.savep;
3666 /*----------------------------------------------------
3670 **----------------------------------------------------
3673 ** physical -> virtual backlink
3674 ** Generic SCSI command
3680 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
3681 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_dsa));
3685 cp->phys.select.sel_id = cmd->device->id;
3686 cp->phys.select.sel_scntl3 = tp->wval;
3687 cp->phys.select.sel_sxfer = tp->sval;
3691 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
3692 cp->phys.smsg.size = cpu_to_scr(msglen);
3697 memcpy(cp->cdb_buf, cmd->cmnd, min_t(int, cmd->cmd_len, sizeof(cp->cdb_buf)));
3698 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, cdb_buf[0]));
3699 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
3704 cp->actualquirks = 0;
3705 cp->host_status = cp->nego_status ? HS_NEGOTIATE : HS_BUSY;
3706 cp->scsi_status = S_ILLEGAL;
3707 cp->parity_status = 0;
3709 cp->xerr_status = XE_OK;
3711 cp->sync_status = tp->sval;
3712 cp->wide_status = tp->wval;
3715 /*----------------------------------------------------
3717 ** Critical region: start this job.
3719 **----------------------------------------------------
3723 ** activate this job.
3725 cp->magic = CCB_MAGIC;
3728 ** insert next CCBs into start queue.
3729 ** 2 max at a time is enough to flush the CCB wait queue.
3733 ncr_start_next_ccb(np, lp, 2);
3735 ncr_put_start_queue(np, cp);
3738 ** Command is successfully queued.
3745 /*==========================================================
3748 ** Insert a CCB into the start queue and wake up the
3749 ** SCRIPTS processor.
3752 **==========================================================
3755 static void ncr_start_next_ccb(struct ncb *np, struct lcb *lp, int maxn)
3757 struct list_head *qp;
3763 while (maxn-- && lp->queuedccbs < lp->queuedepth) {
3764 qp = ncr_list_pop(&lp->wait_ccbq);
3768 cp = list_entry(qp, struct ccb, link_ccbq);
3769 list_add_tail(qp, &lp->busy_ccbq);
3770 lp->jump_ccb[cp->tag == NO_TAG ? 0 : cp->tag] =
3771 cpu_to_scr(CCB_PHYS (cp, restart));
3772 ncr_put_start_queue(np, cp);
3776 static void ncr_put_start_queue(struct ncb *np, struct ccb *cp)
3781 ** insert into start queue.
3783 if (!np->squeueput) np->squeueput = 1;
3784 qidx = np->squeueput + 2;
3785 if (qidx >= MAX_START + MAX_START) qidx = 1;
3787 np->scripth->tryloop [qidx] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
3789 np->scripth->tryloop [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, start));
3791 np->squeueput = qidx;
3795 if (DEBUG_FLAGS & DEBUG_QUEUE)
3796 printk ("%s: queuepos=%d.\n", ncr_name (np), np->squeueput);
3799 ** Script processor may be waiting for reselect.
3803 OUTB (nc_istat, SIGP);
3807 static int ncr_reset_scsi_bus(struct ncb *np, int enab_int, int settle_delay)
3812 np->settle_time = ktime_get(settle_delay * HZ);
3814 if (bootverbose > 1)
3815 printk("%s: resetting, "
3816 "command processing suspended for %d seconds\n",
3817 ncr_name(np), settle_delay);
3819 ncr_chip_reset(np, 100);
3820 udelay(2000); /* The 895 needs time for the bus mode to settle */
3822 OUTW (nc_sien, RST);
3824 ** Enable Tolerant, reset IRQD if present and
3825 ** properly set IRQ mode, prior to resetting the bus.
3827 OUTB (nc_stest3, TE);
3828 OUTB (nc_scntl1, CRST);
3831 if (!driver_setup.bus_check)
3834 ** Check for no terminators or SCSI bus shorts to ground.
3835 ** Read SCSI data bus, data parity bits and control signals.
3836 ** We are expecting RESET to be TRUE and other signals to be
3840 term = INB(nc_sstat0);
3841 term = ((term & 2) << 7) + ((term & 1) << 17); /* rst sdp0 */
3842 term |= ((INB(nc_sstat2) & 0x01) << 26) | /* sdp1 */
3843 ((INW(nc_sbdl) & 0xff) << 9) | /* d7-0 */
3844 ((INW(nc_sbdl) & 0xff00) << 10) | /* d15-8 */
3845 INB(nc_sbcl); /* req ack bsy sel atn msg cd io */
3847 if (!(np->features & FE_WIDE))
3850 if (term != (2<<7)) {
3851 printk("%s: suspicious SCSI data while resetting the BUS.\n",
3853 printk("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
3854 "0x%lx, expecting 0x%lx\n",
3856 (np->features & FE_WIDE) ? "dp1,d15-8," : "",
3857 (u_long)term, (u_long)(2<<7));
3858 if (driver_setup.bus_check == 1)
3862 OUTB (nc_scntl1, 0);
3867 * Start reset process.
3868 * If reset in progress do nothing.
3869 * The interrupt handler will reinitialize the chip.
3870 * The timeout handler will wait for settle_time before
3871 * clearing it and so resuming command processing.
3873 static void ncr_start_reset(struct ncb *np)
3875 if (!np->settle_time) {
3876 ncr_reset_scsi_bus(np, 1, driver_setup.settle_delay);
3880 /*==========================================================
3883 ** Reset the SCSI BUS.
3884 ** This is called from the generic SCSI driver.
3887 **==========================================================
3889 static int ncr_reset_bus (struct ncb *np, struct scsi_cmnd *cmd, int sync_reset)
3891 /* struct scsi_device *device = cmd->device; */
3896 * Return immediately if reset is in progress.
3898 if (np->settle_time) {
3902 * Start the reset process.
3903 * The script processor is then assumed to be stopped.
3904 * Commands will now be queued in the waiting list until a settle
3905 * delay of 2 seconds will be completed.
3907 ncr_start_reset(np);
3909 * First, look in the wakeup list
3911 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
3913 ** look for the ccb of this command.
3915 if (cp->host_status == HS_IDLE) continue;
3916 if (cp->cmd == cmd) {
3922 * Then, look in the waiting list
3924 if (!found && retrieve_from_waiting_list(0, np, cmd))
3927 * Wake-up all awaiting commands with DID_RESET.
3929 reset_waiting_list(np);
3931 * Wake-up all pending commands with HS_RESET -> DID_RESET.
3933 ncr_wakeup(np, HS_RESET);
3935 * If the involved command was not in a driver queue, and the
3936 * scsi driver told us reset is synchronous, and the command is not
3937 * currently in the waiting list, complete it with DID_RESET status,
3938 * in order to keep it alive.
3940 if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
3941 cmd->result = ScsiResult(DID_RESET, 0);
3942 ncr_queue_done_cmd(np, cmd);
3948 #if 0 /* unused and broken.. */
3949 /*==========================================================
3952 ** Abort an SCSI command.
3953 ** This is called from the generic SCSI driver.
3956 **==========================================================
3958 static int ncr_abort_command (struct ncb *np, struct scsi_cmnd *cmd)
3960 /* struct scsi_device *device = cmd->device; */
3966 * First, look for the scsi command in the waiting list
3968 if (remove_from_waiting_list(np, cmd)) {
3969 cmd->result = ScsiResult(DID_ABORT, 0);
3970 ncr_queue_done_cmd(np, cmd);
3971 return SCSI_ABORT_SUCCESS;
3975 * Then, look in the wakeup list
3977 for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
3979 ** look for the ccb of this command.
3981 if (cp->host_status == HS_IDLE) continue;
3982 if (cp->cmd == cmd) {
3989 return SCSI_ABORT_NOT_RUNNING;
3992 if (np->settle_time) {
3993 return SCSI_ABORT_SNOOZE;
3997 ** If the CCB is active, patch schedule jumps for the
3998 ** script to abort the command.
4001 switch(cp->host_status) {
4004 printk ("%s: abort ccb=%p (cancel)\n", ncr_name (np), cp);
4005 cp->start.schedule.l_paddr =
4006 cpu_to_scr(NCB_SCRIPTH_PHYS (np, cancel));
4007 retv = SCSI_ABORT_PENDING;
4010 cp->restart.schedule.l_paddr =
4011 cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
4012 retv = SCSI_ABORT_PENDING;
4015 retv = SCSI_ABORT_NOT_RUNNING;
4021 ** If there are no requests, the script
4022 ** processor will sleep on SEL_WAIT_RESEL.
4023 ** Let's wake it up, since it may have to work.
4025 OUTB (nc_istat, SIGP);
4031 static void ncr_detach(struct ncb *np)
4040 /* Local copy so we don't access np after freeing it! */
4041 strlcpy(inst_name, ncr_name(np), sizeof(inst_name));
4043 printk("%s: releasing host resources\n", ncr_name(np));
4046 ** Stop the ncr_timeout process
4047 ** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
4050 #ifdef DEBUG_NCR53C8XX
4051 printk("%s: stopping the timer\n", ncr_name(np));
4053 np->release_stage = 1;
4054 for (i = 50 ; i && np->release_stage != 2 ; i--)
4056 if (np->release_stage != 2)
4057 printk("%s: the timer seems to be already stopped\n", ncr_name(np));
4058 else np->release_stage = 2;
4061 ** Disable chip interrupts
4064 #ifdef DEBUG_NCR53C8XX
4065 printk("%s: disabling chip interrupts\n", ncr_name(np));
4072 ** Restore bios setting for automatic clock detection.
4075 printk("%s: resetting chip\n", ncr_name(np));
4076 ncr_chip_reset(np, 100);
4078 OUTB(nc_dmode, np->sv_dmode);
4079 OUTB(nc_dcntl, np->sv_dcntl);
4080 OUTB(nc_ctest0, np->sv_ctest0);
4081 OUTB(nc_ctest3, np->sv_ctest3);
4082 OUTB(nc_ctest4, np->sv_ctest4);
4083 OUTB(nc_ctest5, np->sv_ctest5);
4084 OUTB(nc_gpcntl, np->sv_gpcntl);
4085 OUTB(nc_stest2, np->sv_stest2);
4087 ncr_selectclock(np, np->sv_scntl3);
4090 ** Free allocated ccb(s)
4093 while ((cp=np->ccb->link_ccb) != NULL) {
4094 np->ccb->link_ccb = cp->link_ccb;
4095 if (cp->host_status) {
4096 printk("%s: shall free an active ccb (host_status=%d)\n",
4097 ncr_name(np), cp->host_status);
4099 #ifdef DEBUG_NCR53C8XX
4100 printk("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
4102 m_free_dma(cp, sizeof(*cp), "CCB");
4105 /* Free allocated tp(s) */
4107 for (target = 0; target < MAX_TARGET ; target++) {
4108 tp=&np->target[target];
4109 for (lun = 0 ; lun < MAX_LUN ; lun++) {
4112 #ifdef DEBUG_NCR53C8XX
4113 printk("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
4115 if (lp->jump_ccb != &lp->jump_ccb_0)
4116 m_free_dma(lp->jump_ccb,256,"JUMP_CCB");
4117 m_free_dma(lp, sizeof(*lp), "LCB");
4123 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
4125 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
4127 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
4128 m_free_dma(np, sizeof(struct ncb), "NCB");
4130 printk("%s: host resources successfully released\n", inst_name);
4133 /*==========================================================
4136 ** Complete execution of a SCSI command.
4137 ** Signal completion to the generic SCSI driver.
4140 **==========================================================
4143 void ncr_complete (struct ncb *np, struct ccb *cp)
4145 struct scsi_cmnd *cmd;
4153 if (!cp || cp->magic != CCB_MAGIC || !cp->cmd)
4157 ** Print minimal debug information.
4160 if (DEBUG_FLAGS & DEBUG_TINY)
4161 printk ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp,
4162 cp->host_status,cp->scsi_status);
4165 ** Get command, target and lun pointers.
4170 tp = &np->target[cmd->device->id];
4171 lp = tp->lp[cmd->device->lun];
4174 ** We donnot queue more than 1 ccb per target
4175 ** with negotiation at any time. If this ccb was
4176 ** used for negotiation, clear this info in the tcb.
4179 if (cp == tp->nego_cp)
4183 ** If auto-sense performed, change scsi status.
4185 if (cp->auto_sense) {
4186 cp->scsi_status = cp->auto_sense;
4190 ** If we were recovering from queue full or performing
4191 ** auto-sense, requeue skipped CCBs to the wait queue.
4194 if (lp && lp->held_ccb) {
4195 if (cp == lp->held_ccb) {
4196 list_splice_init(&lp->skip_ccbq, &lp->wait_ccbq);
4197 lp->held_ccb = NULL;
4202 ** Check for parity errors.
4205 if (cp->parity_status > 1) {
4207 printk ("%d parity error(s).\n",cp->parity_status);
4211 ** Check for extended errors.
4214 if (cp->xerr_status != XE_OK) {
4216 switch (cp->xerr_status) {
4218 printk ("extraneous data discarded.\n");
4221 printk ("invalid scsi phase (4/5).\n");
4224 printk ("extended error %d.\n", cp->xerr_status);
4227 if (cp->host_status==HS_COMPLETE)
4228 cp->host_status = HS_FAIL;
4232 ** Print out any error for debugging purpose.
4234 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4235 if (cp->host_status!=HS_COMPLETE || cp->scsi_status!=S_GOOD) {
4237 printk ("ERROR: cmd=%x host_status=%x scsi_status=%x\n",
4238 cmd->cmnd[0], cp->host_status, cp->scsi_status);
4243 ** Check the status.
4245 if ( (cp->host_status == HS_COMPLETE)
4246 && (cp->scsi_status == S_GOOD ||
4247 cp->scsi_status == S_COND_MET)) {
4249 * All went well (GOOD status).
4250 * CONDITION MET status is returned on
4251 * `Pre-Fetch' or `Search data' success.
4253 cmd->result = ScsiResult(DID_OK, cp->scsi_status);
4257 ** Could dig out the correct value for resid,
4258 ** but it would be quite complicated.
4260 /* if (cp->phys.header.lastp != cp->phys.header.goalp) */
4263 ** Allocate the lcb if not yet.
4266 ncr_alloc_lcb (np, cmd->device->id, cmd->device->lun);
4268 tp->bytes += cp->data_len;
4272 ** If tags was reduced due to queue full,
4273 ** increase tags if 1000 good status received.
4275 if (lp && lp->usetags && lp->numtags < lp->maxtags) {
4277 if (lp->num_good >= 1000) {
4280 ncr_setup_tags (np, cmd->device);
4283 } else if ((cp->host_status == HS_COMPLETE)
4284 && (cp->scsi_status == S_CHECK_COND)) {
4286 ** Check condition code
4288 cmd->result = ScsiResult(DID_OK, S_CHECK_COND);
4291 ** Copy back sense data to caller's buffer.
4293 memcpy(cmd->sense_buffer, cp->sense_buf,
4294 min(sizeof(cmd->sense_buffer), sizeof(cp->sense_buf)));
4296 if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
4297 u_char * p = (u_char*) & cmd->sense_buffer;
4300 printk ("sense data:");
4301 for (i=0; i<14; i++) printk (" %x", *p++);
4304 } else if ((cp->host_status == HS_COMPLETE)
4305 && (cp->scsi_status == S_CONFLICT)) {
4307 ** Reservation Conflict condition code
4309 cmd->result = ScsiResult(DID_OK, S_CONFLICT);
4311 } else if ((cp->host_status == HS_COMPLETE)
4312 && (cp->scsi_status == S_BUSY ||
4313 cp->scsi_status == S_QUEUE_FULL)) {
4318 cmd->result = ScsiResult(DID_OK, cp->scsi_status);
4320 } else if ((cp->host_status == HS_SEL_TIMEOUT)
4321 || (cp->host_status == HS_TIMEOUT)) {
4326 cmd->result = ScsiResult(DID_TIME_OUT, cp->scsi_status);
4328 } else if (cp->host_status == HS_RESET) {
4333 cmd->result = ScsiResult(DID_RESET, cp->scsi_status);
4335 } else if (cp->host_status == HS_ABORTED) {
4340 cmd->result = ScsiResult(DID_ABORT, cp->scsi_status);
4345 ** Other protocol messes
4348 printk ("COMMAND FAILED (%x %x) @%p.\n",
4349 cp->host_status, cp->scsi_status, cp);
4351 cmd->result = ScsiResult(DID_ERROR, cp->scsi_status);
4358 if (tp->usrflag & UF_TRACE) {
4363 p = (u_char*) &cmd->cmnd[0];
4364 for (i=0; i<cmd->cmd_len; i++) printk (" %x", *p++);
4366 if (cp->host_status==HS_COMPLETE) {
4367 switch (cp->scsi_status) {
4373 p = (u_char*) &cmd->sense_buffer;
4374 for (i=0; i<14; i++)
4375 printk (" %x", *p++);
4378 printk (" STAT: %x\n", cp->scsi_status);
4381 } else printk (" HOSTERROR: %x", cp->host_status);
4388 ncr_free_ccb (np, cp);
4391 ** requeue awaiting scsi commands for this lun.
4393 if (lp && lp->queuedccbs < lp->queuedepth &&
4394 !list_empty(&lp->wait_ccbq))
4395 ncr_start_next_ccb(np, lp, 2);
4398 ** requeue awaiting scsi commands for this controller.
4400 if (np->waiting_list)
4401 requeue_waiting_list(np);
4404 ** signal completion to generic driver.
4406 ncr_queue_done_cmd(np, cmd);
4409 /*==========================================================
4412 ** Signal all (or one) control block done.
4415 **==========================================================
4419 ** This CCB has been skipped by the NCR.
4420 ** Queue it in the correponding unit queue.
4422 static void ncr_ccb_skipped(struct ncb *np, struct ccb *cp)
4424 struct tcb *tp = &np->target[cp->target];
4425 struct lcb *lp = tp->lp[cp->lun];
4427 if (lp && cp != np->ccb) {
4428 cp->host_status &= ~HS_SKIPMASK;
4429 cp->start.schedule.l_paddr =
4430 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
4431 list_del(&cp->link_ccbq);
4432 list_add_tail(&cp->link_ccbq, &lp->skip_ccbq);
4444 ** The NCR has completed CCBs.
4445 ** Look at the DONE QUEUE if enabled, otherwise scan all CCBs
4447 void ncr_wakeup_done (struct ncb *np)
4450 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
4453 i = np->ccb_done_ic;
4459 cp = np->ccb_done[j];
4460 if (!CCB_DONE_VALID(cp))
4463 np->ccb_done[j] = (struct ccb *)CCB_DONE_EMPTY;
4464 np->scripth->done_queue[5*j + 4] =
4465 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
4467 np->scripth->done_queue[5*i + 4] =
4468 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
4470 if (cp->host_status & HS_DONEMASK)
4471 ncr_complete (np, cp);
4472 else if (cp->host_status & HS_SKIPMASK)
4473 ncr_ccb_skipped (np, cp);
4477 np->ccb_done_ic = i;
4481 if (cp->host_status & HS_DONEMASK)
4482 ncr_complete (np, cp);
4483 else if (cp->host_status & HS_SKIPMASK)
4484 ncr_ccb_skipped (np, cp);
4491 ** Complete all active CCBs.
4493 void ncr_wakeup (struct ncb *np, u_long code)
4495 struct ccb *cp = np->ccb;
4498 if (cp->host_status != HS_IDLE) {
4499 cp->host_status = code;
4500 ncr_complete (np, cp);
4510 /* Some initialisation must be done immediately following reset, for 53c720,
4511 * at least. EA (dcntl bit 5) isn't set here as it is set once only in
4512 * the _detect function.
4514 static void ncr_chip_reset(struct ncb *np, int delay)
4516 OUTB (nc_istat, SRST);
4518 OUTB (nc_istat, 0 );
4520 if (np->features & FE_EHP)
4521 OUTB (nc_ctest0, EHP);
4522 if (np->features & FE_MUX)
4523 OUTB (nc_ctest4, MUX);
4527 /*==========================================================
4533 **==========================================================
4536 void ncr_init (struct ncb *np, int reset, char * msg, u_long code)
4541 ** Reset chip if asked, otherwise just clear fifos.
4545 OUTB (nc_istat, SRST);
4549 OUTB (nc_stest3, TE|CSF);
4550 OUTONB (nc_ctest3, CLF);
4557 if (msg) printk (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
4560 ** Clear Start Queue
4562 np->queuedepth = MAX_START - 1; /* 1 entry needed as end marker */
4563 for (i = 1; i < MAX_START + MAX_START; i += 2)
4564 np->scripth0->tryloop[i] =
4565 cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
4568 ** Start at first entry.
4571 np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop));
4573 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
4577 for (i = 0; i < MAX_DONE; i++) {
4578 np->ccb_done[i] = (struct ccb *)CCB_DONE_EMPTY;
4579 np->scripth0->done_queue[5*i + 4] =
4580 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_end));
4585 ** Start at first entry.
4587 np->script0->done_pos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np,done_queue));
4588 np->ccb_done_ic = MAX_DONE-1;
4589 np->scripth0->done_queue[5*(MAX_DONE-1) + 4] =
4590 cpu_to_scr(NCB_SCRIPT_PHYS (np, done_plug));
4593 ** Wakeup all pending jobs.
4595 ncr_wakeup (np, code);
4602 ** Remove reset; big delay because the 895 needs time for the
4603 ** bus mode to settle
4605 ncr_chip_reset(np, 2000);
4607 OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
4608 /* full arb., ena parity, par->ATN */
4609 OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
4611 ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
4613 OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
4614 OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
4615 OUTB (nc_istat , SIGP ); /* Signal Process */
4616 OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
4617 OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
4619 OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
4620 OUTB (nc_ctest0, np->rv_ctest0); /* 720: CDIS and EHP */
4621 OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
4622 OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
4624 OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */
4625 OUTB (nc_stest3, TE); /* TolerANT enable */
4626 OUTB (nc_stime0, 0x0c ); /* HTH disabled STO 0.25 sec */
4629 ** Disable disconnects.
4635 ** Enable GPIO0 pin for writing if LED support.
4638 if (np->features & FE_LED0) {
4639 OUTOFFB (nc_gpcntl, 0x01);
4646 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR);
4647 OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
4650 ** Fill in target structure.
4651 ** Reinitialize usrsync.
4652 ** Reinitialize usrwide.
4653 ** Prepare sync negotiation according to actual SCSI bus mode.
4656 for (i=0;i<MAX_TARGET;i++) {
4657 struct tcb *tp = &np->target[i];
4660 tp->wval = np->rv_scntl3;
4662 if (tp->usrsync != 255) {
4663 if (tp->usrsync <= np->maxsync) {
4664 if (tp->usrsync < np->minsync) {
4665 tp->usrsync = np->minsync;
4672 if (tp->usrwide > np->maxwide)
4673 tp->usrwide = np->maxwide;
4675 ncr_negotiate (np, tp);
4679 ** Start script processor.
4683 printk ("%s: Downloading SCSI SCRIPTS.\n",
4685 OUTL (nc_scratcha, vtobus(np->script0));
4686 OUTL_DSP (NCB_SCRIPTH_PHYS (np, start_ram));
4689 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
4692 /*==========================================================
4694 ** Prepare the negotiation values for wide and
4695 ** synchronous transfers.
4697 **==========================================================
4700 static void ncr_negotiate (struct ncb* np, struct tcb* tp)
4703 ** minsync unit is 4ns !
4706 u_long minsync = tp->usrsync;
4709 ** SCSI bus mode limit
4712 if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
4713 if (minsync < 12) minsync = 12;
4720 if (minsync < np->minsync)
4721 minsync = np->minsync;
4727 if (minsync > np->maxsync)
4730 if (tp->maxoffs > np->maxoffs)
4731 tp->maxoffs = np->maxoffs;
4733 tp->minsync = minsync;
4734 tp->maxoffs = (minsync<255 ? tp->maxoffs : 0);
4737 ** period=0: has to negotiate sync transfer
4743 ** widedone=0: has to negotiate wide transfer
4748 /*==========================================================
4750 ** Get clock factor and sync divisor for a given
4751 ** synchronous factor period.
4752 ** Returns the clock factor (in sxfer) and scntl3
4753 ** synchronous divisor field.
4755 **==========================================================
4758 static void ncr_getsync(struct ncb *np, u_char sfac, u_char *fakp, u_char *scntl3p)
4760 u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
4761 int div = np->clock_divn; /* Number of divisors supported */
4762 u_long fak; /* Sync factor in sxfer */
4763 u_long per; /* Period in tenths of ns */
4764 u_long kpc; /* (per * clk) */
4767 ** Compute the synchronous period in tenths of nano-seconds
4769 if (sfac <= 10) per = 250;
4770 else if (sfac == 11) per = 303;
4771 else if (sfac == 12) per = 500;
4772 else per = 40 * sfac;
4775 ** Look for the greatest clock divisor that allows an
4776 ** input speed faster than the period.
4780 if (kpc >= (div_10M[div] << 2)) break;
4783 ** Calculate the lowest clock factor that allows an output
4784 ** speed not faster than the period.
4786 fak = (kpc - 1) / div_10M[div] + 1;
4788 #if 0 /* This optimization does not seem very useful */
4790 per = (fak * div_10M[div]) / clk;
4793 ** Why not to try the immediate lower divisor and to choose
4794 ** the one that allows the fastest output speed ?
4795 ** We don't want input speed too much greater than output speed.
4797 if (div >= 1 && fak < 8) {
4799 fak2 = (kpc - 1) / div_10M[div-1] + 1;
4800 per2 = (fak2 * div_10M[div-1]) / clk;
4801 if (per2 < per && fak2 <= 8) {
4809 if (fak < 4) fak = 4; /* Should never happen, too bad ... */
4812 ** Compute and return sync parameters for the ncr
4815 *scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
4819 /*==========================================================
4821 ** Set actual values, sync status and patch all ccbs of
4822 ** a target according to new sync/wide agreement.
4824 **==========================================================
4827 static void ncr_set_sync_wide_status (struct ncb *np, u_char target)
4830 struct tcb *tp = &np->target[target];
4833 ** set actual value and sync_status
4835 OUTB (nc_sxfer, tp->sval);
4836 np->sync_st = tp->sval;
4837 OUTB (nc_scntl3, tp->wval);
4838 np->wide_st = tp->wval;
4841 ** patch ALL ccbs of this target.
4843 for (cp = np->ccb; cp; cp = cp->link_ccb) {
4844 if (!cp->cmd) continue;
4845 if (cp->cmd->device->id != target) continue;
4847 cp->sync_status = tp->sval;
4848 cp->wide_status = tp->wval;
4850 cp->phys.select.sel_scntl3 = tp->wval;
4851 cp->phys.select.sel_sxfer = tp->sval;
4855 /*==========================================================
4857 ** Switch sync mode for current job and it's target
4859 **==========================================================
4862 static void ncr_setsync (struct ncb *np, struct ccb *cp, u_char scntl3, u_char sxfer)
4864 struct scsi_cmnd *cmd = cp->cmd;
4866 u_char target = INB (nc_sdid) & 0x0f;
4869 BUG_ON(target != (cmd->device->id & 0xf));
4871 tp = &np->target[target];
4873 if (!scntl3 || !(sxfer & 0x1f))
4874 scntl3 = np->rv_scntl3;
4875 scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
4878 ** Deduce the value of controller sync period from scntl3.
4879 ** period is in tenths of nano-seconds.
4882 idiv = ((scntl3 >> 4) & 0x7);
4883 if ((sxfer & 0x1f) && idiv)
4884 tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
4886 tp->period = 0xffff;
4889 ** Stop there if sync parameters are unchanged
4891 if (tp->sval == sxfer && tp->wval == scntl3) return;
4896 ** Bells and whistles ;-)
4898 PRINT_TARGET(np, target);
4899 if (sxfer & 0x01f) {
4900 unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
4901 unsigned mb10 = (f10 + tp->period/2) / tp->period;
4905 ** Disable extended Sreq/Sack filtering
4907 if (tp->period <= 2000) OUTOFFB (nc_stest2, EXT);
4910 ** Bells and whistles ;-)
4912 if (tp->period < 500) scsi = "FAST-40";
4913 else if (tp->period < 1000) scsi = "FAST-20";
4914 else if (tp->period < 2000) scsi = "FAST-10";
4915 else scsi = "FAST-5";
4917 printk ("%s %sSCSI %d.%d MB/s (%d ns, offset %d)\n", scsi,
4918 tp->widedone > 1 ? "WIDE " : "",
4919 mb10 / 10, mb10 % 10, tp->period / 10, sxfer & 0x1f);
4921 printk ("%sasynchronous.\n", tp->widedone > 1 ? "wide " : "");
4924 ** set actual value and sync_status
4925 ** patch ALL ccbs of this target.
4927 ncr_set_sync_wide_status(np, target);
4930 /*==========================================================
4932 ** Switch wide mode for current job and it's target
4933 ** SCSI specs say: a SCSI device that accepts a WDTR
4934 ** message shall reset the synchronous agreement to
4935 ** asynchronous mode.
4937 **==========================================================
4940 static void ncr_setwide (struct ncb *np, struct ccb *cp, u_char wide, u_char ack)
4942 struct scsi_cmnd *cmd = cp->cmd;
4943 u16 target = INB (nc_sdid) & 0x0f;
4948 BUG_ON(target != (cmd->device->id & 0xf));
4950 tp = &np->target[target];
4951 tp->widedone = wide+1;
4952 scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
4954 sxfer = ack ? 0 : tp->sval;
4957 ** Stop there if sync/wide parameters are unchanged
4959 if (tp->sval == sxfer && tp->wval == scntl3) return;
4964 ** Bells and whistles ;-)
4966 if (bootverbose >= 2) {
4967 PRINT_TARGET(np, target);
4969 printk ("WIDE SCSI (16 bit) enabled.\n");
4971 printk ("WIDE SCSI disabled.\n");
4975 ** set actual value and sync_status
4976 ** patch ALL ccbs of this target.
4978 ncr_set_sync_wide_status(np, target);
4981 /*==========================================================
4983 ** Switch tagged mode for a target.
4985 **==========================================================
4988 static void ncr_setup_tags (struct ncb *np, struct scsi_device *sdev)
4990 unsigned char tn = sdev->id, ln = sdev->lun;
4991 struct tcb *tp = &np->target[tn];
4992 struct lcb *lp = tp->lp[ln];
4993 u_char reqtags, maxdepth;
4998 if ((!tp) || (!lp) || !sdev)
5002 ** If SCSI device queue depth is not yet set, leave here.
5004 if (!lp->scdev_depth)
5008 ** Donnot allow more tags than the SCSI driver can queue
5010 ** Donnot allow more tags than we can handle.
5012 maxdepth = lp->scdev_depth;
5013 if (maxdepth > lp->maxnxs) maxdepth = lp->maxnxs;
5014 if (lp->maxtags > maxdepth) lp->maxtags = maxdepth;
5015 if (lp->numtags > maxdepth) lp->numtags = maxdepth;
5018 ** only devices conformant to ANSI Version >= 2
5019 ** only devices capable of tagged commands
5020 ** only if enabled by user ..
5022 if (sdev->tagged_supported && lp->numtags > 1) {
5023 reqtags = lp->numtags;
5029 ** Update max number of tags
5031 lp->numtags = reqtags;
5032 if (lp->numtags > lp->maxtags)
5033 lp->maxtags = lp->numtags;
5036 ** If we want to switch tag mode, we must wait
5037 ** for no CCB to be active.
5039 if (reqtags > 1 && lp->usetags) { /* Stay in tagged mode */
5040 if (lp->queuedepth == reqtags) /* Already announced */
5042 lp->queuedepth = reqtags;
5044 else if (reqtags <= 1 && !lp->usetags) { /* Stay in untagged mode */
5045 lp->queuedepth = reqtags;
5048 else { /* Want to switch tag mode */
5049 if (lp->busyccbs) /* If not yet safe, return */
5051 lp->queuedepth = reqtags;
5052 lp->usetags = reqtags > 1 ? 1 : 0;
5056 ** Patch the lun mini-script, according to tag mode.
5058 lp->jump_tag.l_paddr = lp->usetags?
5059 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_tag)) :
5060 cpu_to_scr(NCB_SCRIPT_PHYS(np, resel_notag));
5063 ** Announce change to user.
5066 PRINT_LUN(np, tn, ln);
5068 printk("tagged command queue depth set to %d\n", reqtags);
5071 printk("tagged command queueing disabled\n");
5076 /*==========================================================
5079 ** ncr timeout handler.
5082 **==========================================================
5084 ** Misused to keep the driver running when
5085 ** interrupts are not configured correctly.
5087 **----------------------------------------------------------
5090 static void ncr_timeout (struct ncb *np)
5092 u_long thistime = ktime_get(0);
5095 ** If release process in progress, let's go
5096 ** Set the release stage from 1 to 2 to synchronize
5097 ** with the release process.
5100 if (np->release_stage) {
5101 if (np->release_stage == 1) np->release_stage = 2;
5105 np->timer.expires = ktime_get(SCSI_NCR_TIMER_INTERVAL);
5106 add_timer(&np->timer);
5109 ** If we are resetting the ncr, wait for settle_time before
5110 ** clearing it. Then command processing will be resumed.
5112 if (np->settle_time) {
5113 if (np->settle_time <= thistime) {
5114 if (bootverbose > 1)
5115 printk("%s: command processing resumed\n", ncr_name(np));
5116 np->settle_time = 0;
5118 requeue_waiting_list(np);
5124 ** Since the generic scsi driver only allows us 0.5 second
5125 ** to perform abort of a command, we must look at ccbs about
5126 ** every 0.25 second.
5128 if (np->lasttime + 4*HZ < thistime) {
5130 ** block ncr interrupts
5132 np->lasttime = thistime;
5135 #ifdef SCSI_NCR_BROKEN_INTR
5136 if (INB(nc_istat) & (INTF|SIP|DIP)) {
5139 ** Process pending interrupts.
5141 if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
5143 if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
5145 #endif /* SCSI_NCR_BROKEN_INTR */
5148 /*==========================================================
5150 ** log message for real hard errors
5152 ** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
5153 ** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
5155 ** exception register:
5160 ** so: control lines as driver by NCR.
5161 ** si: control lines as seen by NCR.
5162 ** sd: scsi data lines as seen by NCR.
5165 ** sxfer: (see the manual)
5166 ** scntl3: (see the manual)
5168 ** current script command:
5169 ** dsp: script address (relative to start of script).
5170 ** dbc: first word of script command.
5172 ** First 16 register of the chip:
5175 **==========================================================
5178 static void ncr_log_hard_error(struct ncb *np, u16 sist, u_char dstat)
5184 u_char *script_base;
5189 if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
5190 script_ofs = dsp - np->p_script;
5191 script_size = sizeof(struct script);
5192 script_base = (u_char *) np->script0;
5193 script_name = "script";
5195 else if (np->p_scripth < dsp &&
5196 dsp <= np->p_scripth + sizeof(struct scripth)) {
5197 script_ofs = dsp - np->p_scripth;
5198 script_size = sizeof(struct scripth);
5199 script_base = (u_char *) np->scripth0;
5200 script_name = "scripth";
5205 script_name = "mem";
5208 printk ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
5209 ncr_name (np), (unsigned)INB (nc_sdid)&0x0f, dstat, sist,
5210 (unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
5211 (unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
5212 (unsigned)INL (nc_dbc));
5214 if (((script_ofs & 3) == 0) &&
5215 (unsigned)script_ofs < script_size) {
5216 printk ("%s: script cmd = %08x\n", ncr_name(np),
5217 scr_to_cpu((int) *(ncrcmd *)(script_base + script_ofs)));
5220 printk ("%s: regdump:", ncr_name(np));
5222 printk (" %02x", (unsigned)INB_OFF(i));
5226 /*============================================================
5228 ** ncr chip exception handler.
5230 **============================================================
5232 ** In normal cases, interrupt conditions occur one at a
5233 ** time. The ncr is able to stack in some extra registers
5234 ** other interrupts that will occurs after the first one.
5235 ** But severall interrupts may occur at the same time.
5237 ** We probably should only try to deal with the normal
5238 ** case, but it seems that multiple interrupts occur in
5239 ** some cases that are not abnormal at all.
5241 ** The most frequent interrupt condition is Phase Mismatch.
5242 ** We should want to service this interrupt quickly.
5243 ** A SCSI parity error may be delivered at the same time.
5244 ** The SIR interrupt is not very frequent in this driver,
5245 ** since the INTFLY is likely used for command completion
5247 ** The Selection Timeout interrupt may be triggered with
5249 ** The SBMC interrupt (SCSI Bus Mode Change) may probably
5250 ** occur at any time.
5252 ** This handler try to deal as cleverly as possible with all
5255 **============================================================
5258 void ncr_exception (struct ncb *np)
5260 u_char istat, dstat;
5265 ** interrupt on the fly ?
5266 ** Since the global header may be copied back to a CCB
5267 ** using a posted PCI memory write, the last operation on
5268 ** the istat register is a READ in order to flush posted
5269 ** PCI write commands.
5271 istat = INB (nc_istat);
5273 OUTB (nc_istat, (istat & SIGP) | INTF);
5274 istat = INB (nc_istat);
5275 if (DEBUG_FLAGS & DEBUG_TINY) printk ("F ");
5276 ncr_wakeup_done (np);
5279 if (!(istat & (SIP|DIP)))
5283 OUTB (nc_istat, CABRT);
5286 ** Steinbach's Guideline for Systems Programming:
5287 ** Never test for an error condition you don't know how to handle.
5290 sist = (istat & SIP) ? INW (nc_sist) : 0;
5291 dstat = (istat & DIP) ? INB (nc_dstat) : 0;
5293 if (DEBUG_FLAGS & DEBUG_TINY)
5294 printk ("<%d|%x:%x|%x:%x>",
5297 (unsigned)INL(nc_dsp),
5298 (unsigned)INL(nc_dbc));
5300 /*========================================================
5301 ** First, interrupts we want to service cleanly.
5303 ** Phase mismatch is the most frequent interrupt, and
5304 ** so we have to service it as quickly and as cleanly
5306 ** Programmed interrupts are rarely used in this driver,
5307 ** but we must handle them cleanly anyway.
5308 ** We try to deal with PAR and SBMC combined with
5309 ** some other interrupt(s).
5310 **=========================================================
5313 if (!(sist & (STO|GEN|HTH|SGE|UDC|RST)) &&
5314 !(dstat & (MDPE|BF|ABRT|IID))) {
5315 if ((sist & SBMC) && ncr_int_sbmc (np))
5317 if ((sist & PAR) && ncr_int_par (np))
5328 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
5330 if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
5331 printk( "%s: unknown interrupt(s) ignored, "
5332 "ISTAT=%x DSTAT=%x SIST=%x\n",
5333 ncr_name(np), istat, dstat, sist);
5340 /*========================================================
5341 ** Now, interrupts that need some fixing up.
5342 ** Order and multiple interrupts is so less important.
5344 ** If SRST has been asserted, we just reset the chip.
5346 ** Selection is intirely handled by the chip. If the
5347 ** chip says STO, we trust it. Seems some other
5348 ** interrupts may occur at the same time (UDC, IID), so
5349 ** we ignore them. In any case we do enough fix-up
5350 ** in the service routine.
5351 ** We just exclude some fatal dma errors.
5352 **=========================================================
5356 ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
5361 !(dstat & (MDPE|BF|ABRT))) {
5363 ** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
5365 OUTONB (nc_ctest3, CLF);
5371 /*=========================================================
5372 ** Now, interrupts we are not able to recover cleanly.
5373 ** (At least for the moment).
5375 ** Do the register dump.
5376 ** Log message for real hard errors.
5378 ** For MDPE, BF, ABORT, IID, SGE and HTH we reset the
5379 ** BUS and the chip.
5380 ** We are more soft for UDC.
5381 **=========================================================
5384 if (ktime_exp(np->regtime)) {
5385 np->regtime = ktime_get(10*HZ);
5386 for (i = 0; i<sizeof(np->regdump); i++)
5387 ((char*)&np->regdump)[i] = INB_OFF(i);
5388 np->regdump.nc_dstat = dstat;
5389 np->regdump.nc_sist = sist;
5392 ncr_log_hard_error(np, sist, dstat);
5394 printk ("%s: have to clear fifos.\n", ncr_name (np));
5395 OUTB (nc_stest3, TE|CSF);
5396 OUTONB (nc_ctest3, CLF);
5398 if ((sist & (SGE)) ||
5399 (dstat & (MDPE|BF|ABRT|IID))) {
5400 ncr_start_reset(np);
5405 printk ("%s: handshake timeout\n", ncr_name(np));
5406 ncr_start_reset(np);
5411 printk ("%s: unexpected disconnect\n", ncr_name(np));
5412 OUTB (HS_PRT, HS_UNEXPECTED);
5413 OUTL_DSP (NCB_SCRIPT_PHYS (np, cleanup));
5417 /*=========================================================
5418 ** We just miss the cause of the interrupt. :(
5419 ** Print a message. The timeout will do the real work.
5420 **=========================================================
5422 printk ("%s: unknown interrupt\n", ncr_name(np));
5425 /*==========================================================
5427 ** ncr chip exception handler for selection timeout
5429 **==========================================================
5431 ** There seems to be a bug in the 53c810.
5432 ** Although a STO-Interrupt is pending,
5433 ** it continues executing script commands.
5434 ** But it will fail and interrupt (IID) on
5435 ** the next instruction where it's looking
5436 ** for a valid phase.
5438 **----------------------------------------------------------
5441 void ncr_int_sto (struct ncb *np)
5445 if (DEBUG_FLAGS & DEBUG_TINY) printk ("T");
5448 ** look for ccb and set the status.
5453 while (cp && (CCB_PHYS (cp, phys) != dsa))
5457 cp-> host_status = HS_SEL_TIMEOUT;
5458 ncr_complete (np, cp);
5462 ** repair start queue and jump to start point.
5465 OUTL_DSP (NCB_SCRIPTH_PHYS (np, sto_restart));
5469 /*==========================================================
5471 ** ncr chip exception handler for SCSI bus mode change
5473 **==========================================================
5475 ** spi2-r12 11.2.3 says a transceiver mode change must
5476 ** generate a reset event and a device that detects a reset
5477 ** event shall initiate a hard reset. It says also that a
5478 ** device that detects a mode change shall set data transfer
5479 ** mode to eight bit asynchronous, etc...
5480 ** So, just resetting should be enough.
5483 **----------------------------------------------------------
5486 static int ncr_int_sbmc (struct ncb *np)
5488 u_char scsi_mode = INB (nc_stest4) & SMODE;
5490 if (scsi_mode != np->scsi_mode) {
5491 printk("%s: SCSI bus mode change from %x to %x.\n",
5492 ncr_name(np), np->scsi_mode, scsi_mode);
5494 np->scsi_mode = scsi_mode;
5498 ** Suspend command processing for 1 second and
5499 ** reinitialize all except the chip.
5501 np->settle_time = ktime_get(1*HZ);
5502 ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
5508 /*==========================================================
5510 ** ncr chip exception handler for SCSI parity error.
5512 **==========================================================
5515 **----------------------------------------------------------
5518 static int ncr_int_par (struct ncb *np)
5520 u_char hsts = INB (HS_PRT);
5521 u32 dbc = INL (nc_dbc);
5522 u_char sstat1 = INB (nc_sstat1);
5527 printk("%s: SCSI parity error detected: SCR1=%d DBC=%x SSTAT1=%x\n",
5528 ncr_name(np), hsts, dbc, sstat1);
5531 * Ignore the interrupt if the NCR is not connected
5532 * to the SCSI bus, since the right work should have
5533 * been done on unexpected disconnection handling.
5535 if (!(INB (nc_scntl1) & ISCON))
5539 * If the nexus is not clearly identified, reset the bus.
5540 * We will try to do better later.
5542 if (hsts & HS_INVALMASK)
5546 * If the SCSI parity error occurs in MSG IN phase, prepare a
5547 * MSG PARITY message. Otherwise, prepare a INITIATOR DETECTED
5548 * ERROR message and let the device decide to retry the command
5549 * or to terminate with check condition. If we were in MSG IN
5550 * phase waiting for the response of a negotiation, we will
5551 * get SIR_NEGO_FAILED at dispatch.
5553 if (!(dbc & 0xc0000000))
5554 phase = (dbc >> 24) & 7;
5562 * If the NCR stopped on a MOVE ^ DATA_IN, we jump to a
5563 * script that will ignore all data in bytes until phase
5564 * change, since we are not sure the chip will wait the phase
5565 * change prior to delivering the interrupt.
5568 jmp = NCB_SCRIPTH_PHYS (np, par_err_data_in);
5570 jmp = NCB_SCRIPTH_PHYS (np, par_err_other);
5572 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
5573 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
5575 np->msgout[0] = msg;
5580 ncr_start_reset(np);
5584 /*==========================================================
5587 ** ncr chip exception handler for phase errors.
5590 **==========================================================
5592 ** We have to construct a new transfer descriptor,
5593 ** to transfer the rest of the current block.
5595 **----------------------------------------------------------
5598 static void ncr_int_ma (struct ncb *np)
5615 sbcl = INB (nc_sbcl);
5618 rest = dbc & 0xffffff;
5621 ** Take into account dma fifo and various buffers and latches,
5622 ** only if the interrupted phase is an OUTPUT phase.
5625 if ((cmd & 1) == 0) {
5626 u_char ctest5, ss0, ss2;
5629 ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
5631 delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
5633 delta=(INB (nc_dfifo) - rest) & 0x7f;
5636 ** The data in the dma fifo has not been transferred to
5637 ** the target -> add the amount to the rest
5638 ** and clear the data.
5639 ** Check the sstat2 register in case of wide transfer.
5643 ss0 = INB (nc_sstat0);
5644 if (ss0 & OLF) rest++;
5645 if (ss0 & ORF) rest++;
5646 if (INB(nc_scntl3) & EWS) {
5647 ss2 = INB (nc_sstat2);
5648 if (ss2 & OLF1) rest++;
5649 if (ss2 & ORF1) rest++;
5652 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
5653 printk ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7,
5654 (unsigned) rest, (unsigned) delta, ss0);
5657 if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
5658 printk ("P%x%x RL=%d ", cmd&7, sbcl&7, rest);
5664 OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
5665 OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
5668 ** locate matching cp.
5669 ** if the interrupted phase is DATA IN or DATA OUT,
5670 ** trust the global header.
5675 if (CCB_PHYS(cp, phys) != dsa)
5679 while (cp && (CCB_PHYS (cp, phys) != dsa))
5684 ** try to find the interrupted script command,
5685 ** and the address at which to continue.
5689 if (dsp > np->p_script &&
5690 dsp <= np->p_script + sizeof(struct script)) {
5691 vdsp = (u32 *)((char*)np->script0 + (dsp-np->p_script-8));
5694 else if (dsp > np->p_scripth &&
5695 dsp <= np->p_scripth + sizeof(struct scripth)) {
5696 vdsp = (u32 *)((char*)np->scripth0 + (dsp-np->p_scripth-8));
5700 if (dsp == CCB_PHYS (cp, patch[2])) {
5701 vdsp = &cp->patch[0];
5702 nxtdsp = scr_to_cpu(vdsp[3]);
5704 else if (dsp == CCB_PHYS (cp, patch[6])) {
5705 vdsp = &cp->patch[4];
5706 nxtdsp = scr_to_cpu(vdsp[3]);
5711 ** log the information
5714 if (DEBUG_FLAGS & DEBUG_PHASE) {
5715 printk ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
5718 (unsigned)nxtdsp, vdsp, cmd);
5722 ** cp=0 means that the DSA does not point to a valid control
5723 ** block. This should not happen since we donnot use multi-byte
5724 ** move while we are being reselected ot after command complete.
5725 ** We are not able to recover from such a phase error.
5728 printk ("%s: SCSI phase error fixup: "
5729 "CCB already dequeued (0x%08lx)\n",
5730 ncr_name (np), (u_long) np->header.cp);
5735 ** get old startaddress and old length.
5738 oadr = scr_to_cpu(vdsp[1]);
5740 if (cmd & 0x10) { /* Table indirect */
5741 tblp = (u32 *) ((char*) &cp->phys + oadr);
5742 olen = scr_to_cpu(tblp[0]);
5743 oadr = scr_to_cpu(tblp[1]);
5746 olen = scr_to_cpu(vdsp[0]) & 0xffffff;
5749 if (DEBUG_FLAGS & DEBUG_PHASE) {
5750 printk ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
5751 (unsigned) (scr_to_cpu(vdsp[0]) >> 24),
5758 ** check cmd against assumed interrupted script command.
5761 if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) {
5762 PRINT_ADDR(cp->cmd);
5763 printk ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
5764 (unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24);
5770 ** cp != np->header.cp means that the header of the CCB
5771 ** currently being processed has not yet been copied to
5772 ** the global header area. That may happen if the device did
5773 ** not accept all our messages after having been selected.
5775 if (cp != np->header.cp) {
5776 printk ("%s: SCSI phase error fixup: "
5777 "CCB address mismatch (0x%08lx != 0x%08lx)\n",
5778 ncr_name (np), (u_long) cp, (u_long) np->header.cp);
5782 ** if old phase not dataphase, leave here.
5786 PRINT_ADDR(cp->cmd);
5787 printk ("phase change %x-%x %d@%08x resid=%d.\n",
5788 cmd&7, sbcl&7, (unsigned)olen,
5789 (unsigned)oadr, (unsigned)rest);
5790 goto unexpected_phase;
5794 ** choose the correct patch area.
5795 ** if savep points to one, choose the other.
5799 newtmp = CCB_PHYS (cp, patch);
5800 if (newtmp == scr_to_cpu(cp->phys.header.savep)) {
5801 newcmd = &cp->patch[4];
5802 newtmp = CCB_PHYS (cp, patch[4]);
5806 ** fillin the commands
5809 newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest);
5810 newcmd[1] = cpu_to_scr(oadr + olen - rest);
5811 newcmd[2] = cpu_to_scr(SCR_JUMP);
5812 newcmd[3] = cpu_to_scr(nxtdsp);
5814 if (DEBUG_FLAGS & DEBUG_PHASE) {
5815 PRINT_ADDR(cp->cmd);
5816 printk ("newcmd[%d] %x %x %x %x.\n",
5817 (int) (newcmd - cp->patch),
5818 (unsigned)scr_to_cpu(newcmd[0]),
5819 (unsigned)scr_to_cpu(newcmd[1]),
5820 (unsigned)scr_to_cpu(newcmd[2]),
5821 (unsigned)scr_to_cpu(newcmd[3]));
5824 ** fake the return address (to the patch).
5825 ** and restart script processor at dispatcher.
5827 OUTL (nc_temp, newtmp);
5828 OUTL_DSP (NCB_SCRIPT_PHYS (np, dispatch));
5832 ** Unexpected phase changes that occurs when the current phase
5833 ** is not a DATA IN or DATA OUT phase are due to error conditions.
5834 ** Such event may only happen when the SCRIPTS is using a
5835 ** multibyte SCSI MOVE.
5837 ** Phase change Some possible cause
5839 ** COMMAND --> MSG IN SCSI parity error detected by target.
5840 ** COMMAND --> STATUS Bad command or refused by target.
5841 ** MSG OUT --> MSG IN Message rejected by target.
5842 ** MSG OUT --> COMMAND Bogus target that discards extended
5843 ** negotiation messages.
5845 ** The code below does not care of the new phase and so
5846 ** trusts the target. Why to annoy it ?
5847 ** If the interrupted phase is COMMAND phase, we restart at
5849 ** If a target does not get all the messages after selection,
5850 ** the code assumes blindly that the target discards extended
5851 ** messages and clears the negotiation status.
5852 ** If the target does not want all our response to negotiation,
5853 ** we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
5854 ** bloat for such a should_not_happen situation).
5855 ** In all other situation, we reset the BUS.
5856 ** Are these assumptions reasonnable ? (Wait and see ...)
5863 case 2: /* COMMAND phase */
5864 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
5867 case 3: /* STATUS phase */
5868 nxtdsp = NCB_SCRIPT_PHYS (np, dispatch);
5871 case 6: /* MSG OUT phase */
5872 np->scripth->nxtdsp_go_on[0] = cpu_to_scr(dsp + 8);
5873 if (dsp == NCB_SCRIPT_PHYS (np, send_ident)) {
5874 cp->host_status = HS_BUSY;
5875 nxtdsp = NCB_SCRIPTH_PHYS (np, clratn_go_on);
5877 else if (dsp == NCB_SCRIPTH_PHYS (np, send_wdtr) ||
5878 dsp == NCB_SCRIPTH_PHYS (np, send_sdtr)) {
5879 nxtdsp = NCB_SCRIPTH_PHYS (np, nego_bad_phase);
5883 case 7: /* MSG IN phase */
5884 nxtdsp = NCB_SCRIPT_PHYS (np, clrack);
5895 ncr_start_reset(np);
5899 static void ncr_sir_to_redo(struct ncb *np, int num, struct ccb *cp)
5901 struct scsi_cmnd *cmd = cp->cmd;
5902 struct tcb *tp = &np->target[cmd->device->id];
5903 struct lcb *lp = tp->lp[cmd->device->lun];
5904 struct list_head *qp;
5909 u_char s_status = INB (SS_PRT);
5912 ** Let the SCRIPTS processor skip all not yet started CCBs,
5913 ** and count disconnected CCBs. Since the busy queue is in
5914 ** the same order as the chip start queue, disconnected CCBs
5915 ** are before cp and busy ones after.
5918 qp = lp->busy_ccbq.prev;
5919 while (qp != &lp->busy_ccbq) {
5920 cp2 = list_entry(qp, struct ccb, link_ccbq);
5925 cp2->start.schedule.l_paddr =
5926 cpu_to_scr(NCB_SCRIPTH_PHYS (np, skip));
5928 lp->held_ccb = cp; /* Requeue when this one completes */
5929 disc_cnt = lp->queuedccbs - busy_cnt;
5933 default: /* Just for safety, should never happen */
5936 ** Decrease number of tags to the number of
5937 ** disconnected commands.
5941 if (bootverbose >= 1) {
5943 printk ("QUEUE FULL! %d busy, %d disconnected CCBs\n",
5944 busy_cnt, disc_cnt);
5946 if (disc_cnt < lp->numtags) {
5947 lp->numtags = disc_cnt > 2 ? disc_cnt : 2;
5949 ncr_setup_tags (np, cmd->device);
5952 ** Requeue the command to the start queue.
5953 ** If any disconnected commands,
5955 ** Jump to reselect.
5957 cp->phys.header.savep = cp->startp;
5958 cp->host_status = HS_BUSY;
5959 cp->scsi_status = S_ILLEGAL;
5961 ncr_put_start_queue(np, cp);
5963 INB (nc_ctest2); /* Clear SIGP */
5964 OUTL_DSP (NCB_SCRIPT_PHYS (np, reselect));
5969 ** If we were requesting sense, give up.
5975 ** Device returned CHECK CONDITION status.
5976 ** Prepare all needed data strutures for getting
5981 cp->scsi_smsg2[0] = M_IDENTIFY | cmd->device->lun;
5982 cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
5983 cp->phys.smsg.size = cpu_to_scr(1);
5988 cp->phys.cmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd));
5989 cp->phys.cmd.size = cpu_to_scr(6);
5992 ** patch requested size into sense command
5994 cp->sensecmd[0] = 0x03;
5995 cp->sensecmd[1] = cmd->device->lun << 5;
5996 cp->sensecmd[4] = sizeof(cp->sense_buf);
6001 memset(cp->sense_buf, 0, sizeof(cp->sense_buf));
6002 cp->phys.sense.addr = cpu_to_scr(CCB_PHYS(cp,sense_buf[0]));
6003 cp->phys.sense.size = cpu_to_scr(sizeof(cp->sense_buf));
6006 ** requeue the command.
6008 startp = cpu_to_scr(NCB_SCRIPTH_PHYS (np, sdata_in));
6010 cp->phys.header.savep = startp;
6011 cp->phys.header.goalp = startp + 24;
6012 cp->phys.header.lastp = startp;
6013 cp->phys.header.wgoalp = startp + 24;
6014 cp->phys.header.wlastp = startp;
6016 cp->host_status = HS_BUSY;
6017 cp->scsi_status = S_ILLEGAL;
6018 cp->auto_sense = s_status;
6020 cp->start.schedule.l_paddr =
6021 cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
6024 ** Select without ATN for quirky devices.
6026 if (cmd->device->select_no_atn)
6027 cp->start.schedule.l_paddr =
6028 cpu_to_scr(NCB_SCRIPTH_PHYS (np, select_no_atn));
6030 ncr_put_start_queue(np, cp);
6032 OUTL_DSP (NCB_SCRIPT_PHYS (np, start));
6042 /*==========================================================
6045 ** ncr chip exception handler for programmed interrupts.
6048 **==========================================================
6051 static int ncr_show_msg (u_char * msg)
6055 if (*msg==M_EXTENDED) {
6057 if (i-1>msg[1]) break;
6058 printk ("-%x",msg[i]);
6061 } else if ((*msg & 0xf0) == 0x20) {
6062 printk ("-%x",msg[1]);
6068 static void ncr_print_msg ( struct ccb *cp, char *label, u_char *msg)
6071 PRINT_ADDR(cp->cmd);
6073 printk("%s: ", label);
6075 (void) ncr_show_msg (msg);
6079 void ncr_int_sir (struct ncb *np)
6082 u_char chg, ofs, per, fak, wide;
6083 u_char num = INB (nc_dsps);
6084 struct ccb *cp=NULL;
6085 u_long dsa = INL (nc_dsa);
6086 u_char target = INB (nc_sdid) & 0x0f;
6087 struct tcb *tp = &np->target[target];
6088 struct scsi_target *starget = tp->starget;
6090 if (DEBUG_FLAGS & DEBUG_TINY) printk ("I#%d", num);
6095 ** This is used for HP Zalon/53c720 where INTFLY
6096 ** operation is currently broken.
6098 ncr_wakeup_done(np);
6099 #ifdef SCSI_NCR_CCB_DONE_SUPPORT
6100 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, done_end) + 8);
6102 OUTL(nc_dsp, NCB_SCRIPT_PHYS (np, start));
6105 case SIR_RESEL_NO_MSG_IN:
6106 case SIR_RESEL_NO_IDENTIFY:
6108 ** If devices reselecting without sending an IDENTIFY
6109 ** message still exist, this should help.
6110 ** We just assume lun=0, 1 CCB, no tag.
6113 OUTL_DSP (scr_to_cpu(tp->lp[0]->jump_ccb[0]));
6116 case SIR_RESEL_BAD_TARGET: /* Will send a TARGET RESET message */
6117 case SIR_RESEL_BAD_LUN: /* Will send a TARGET RESET message */
6118 case SIR_RESEL_BAD_I_T_L_Q: /* Will send an ABORT TAG message */
6119 case SIR_RESEL_BAD_I_T_L: /* Will send an ABORT message */
6120 printk ("%s:%d: SIR %d, "
6121 "incorrect nexus identification on reselection\n",
6122 ncr_name (np), target, num);
6124 case SIR_DONE_OVERFLOW:
6125 printk ("%s:%d: SIR %d, "
6126 "CCB done queue overflow\n",
6127 ncr_name (np), target, num);
6129 case SIR_BAD_STATUS:
6131 if (!cp || CCB_PHYS (cp, phys) != dsa)
6133 ncr_sir_to_redo(np, num, cp);
6140 while (cp && (CCB_PHYS (cp, phys) != dsa))
6144 BUG_ON(cp != np->header.cp);
6146 if (!cp || cp != np->header.cp)
6151 /*-----------------------------------------------------------------------------
6153 ** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
6155 ** We try to negotiate sync and wide transfer only after
6156 ** a successful inquire command. We look at byte 7 of the
6157 ** inquire data to determine the capabilities of the target.
6159 ** When we try to negotiate, we append the negotiation message
6160 ** to the identify and (maybe) simple tag message.
6161 ** The host status field is set to HS_NEGOTIATE to mark this
6164 ** If the target doesn't answer this message immidiately
6165 ** (as required by the standard), the SIR_NEGO_FAIL interrupt
6166 ** will be raised eventually.
6167 ** The handler removes the HS_NEGOTIATE status, and sets the
6168 ** negotiated value to the default (async / nowide).
6170 ** If we receive a matching answer immediately, we check it
6171 ** for validity, and set the values.
6173 ** If we receive a Reject message immediately, we assume the
6174 ** negotiation has failed, and fall back to standard values.
6176 ** If we receive a negotiation message while not in HS_NEGOTIATE
6177 ** state, it's a target initiated negotiation. We prepare a
6178 ** (hopefully) valid answer, set our parameters, and send back
6179 ** this answer to the target.
6181 ** If the target doesn't fetch the answer (no message out phase),
6182 ** we assume the negotiation has failed, and fall back to default
6185 ** When we set the values, we adjust them in all ccbs belonging
6186 ** to this target, in the controller's register, and in the "phys"
6187 ** field of the controller's struct ncb.
6189 ** Possible cases: hs sir msg_in value send goto
6190 ** We try to negotiate:
6191 ** -> target doesn't msgin NEG FAIL noop defa. - dispatch
6192 ** -> target rejected our msg NEG FAIL reject defa. - dispatch
6193 ** -> target answered (ok) NEG SYNC sdtr set - clrack
6194 ** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
6195 ** -> target answered (ok) NEG WIDE wdtr set - clrack
6196 ** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
6197 ** -> any other msgin NEG FAIL noop defa. - dispatch
6199 ** Target tries to negotiate:
6200 ** -> incoming message --- SYNC sdtr set SDTR -
6201 ** -> incoming message --- WIDE wdtr set WDTR -
6202 ** We sent our answer:
6203 ** -> target doesn't msgout --- PROTO ? defa. - dispatch
6205 **-----------------------------------------------------------------------------
6208 case SIR_NEGO_FAILED:
6209 /*-------------------------------------------------------
6211 ** Negotiation failed.
6212 ** Target doesn't send an answer message,
6213 ** or target rejected our message.
6215 ** Remove negotiation request.
6217 **-------------------------------------------------------
6219 OUTB (HS_PRT, HS_BUSY);
6223 case SIR_NEGO_PROTO:
6224 /*-------------------------------------------------------
6226 ** Negotiation failed.
6227 ** Target doesn't fetch the answer message.
6229 **-------------------------------------------------------
6232 if (DEBUG_FLAGS & DEBUG_NEGO) {
6233 PRINT_ADDR(cp->cmd);
6234 printk ("negotiation failed sir=%x status=%x.\n",
6235 num, cp->nego_status);
6239 ** any error in negotiation:
6240 ** fall back to default mode.
6242 switch (cp->nego_status) {
6245 ncr_setsync (np, cp, 0, 0xe0);
6246 spi_period(starget) = 0;
6247 spi_offset(starget) = 0;
6251 ncr_setwide (np, cp, 0, 0);
6252 spi_width(starget) = 0;
6256 np->msgin [0] = M_NOOP;
6257 np->msgout[0] = M_NOOP;
6258 cp->nego_status = 0;
6263 ** Synchronous request message received.
6266 if (DEBUG_FLAGS & DEBUG_NEGO) {
6267 PRINT_ADDR(cp->cmd);
6268 printk ("sync msgin: ");
6269 (void) ncr_show_msg (np->msgin);
6274 ** get requested values.
6280 if (ofs==0) per=255;
6283 ** if target sends SDTR message,
6284 ** it CAN transfer synch.
6287 if (ofs && tp->starget)
6288 spi_support_sync(tp->starget) = 1;
6291 ** check values against driver limits.
6294 if (per < np->minsync)
6295 {chg = 1; per = np->minsync;}
6296 if (per < tp->minsync)
6297 {chg = 1; per = tp->minsync;}
6298 if (ofs > tp->maxoffs)
6299 {chg = 1; ofs = tp->maxoffs;}
6302 ** Check against controller limits.
6307 ncr_getsync(np, per, &fak, &scntl3);
6320 if (DEBUG_FLAGS & DEBUG_NEGO) {
6321 PRINT_ADDR(cp->cmd);
6322 printk ("sync: per=%d scntl3=0x%x ofs=%d fak=%d chg=%d.\n",
6323 per, scntl3, ofs, fak, chg);
6326 if (INB (HS_PRT) == HS_NEGOTIATE) {
6327 OUTB (HS_PRT, HS_BUSY);
6328 switch (cp->nego_status) {
6332 ** This was an answer message
6336 ** Answer wasn't acceptable.
6338 ncr_setsync (np, cp, 0, 0xe0);
6339 spi_period(starget) = 0;
6340 spi_offset(starget) = 0;
6341 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6346 ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
6347 spi_period(starget) = per;
6348 spi_offset(starget) = ofs;
6349 OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
6354 ncr_setwide (np, cp, 0, 0);
6355 spi_width(starget) = 0;
6361 ** It was a request. Set value and
6362 ** prepare an answer message
6365 ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
6366 spi_period(starget) = per;
6367 spi_offset(starget) = ofs;
6369 np->msgout[0] = M_EXTENDED;
6371 np->msgout[2] = M_X_SYNC_REQ;
6372 np->msgout[3] = per;
6373 np->msgout[4] = ofs;
6375 cp->nego_status = NS_SYNC;
6377 if (DEBUG_FLAGS & DEBUG_NEGO) {
6378 PRINT_ADDR(cp->cmd);
6379 printk ("sync msgout: ");
6380 (void) ncr_show_msg (np->msgout);
6385 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6388 np->msgin [0] = M_NOOP;
6394 ** Wide request message received.
6396 if (DEBUG_FLAGS & DEBUG_NEGO) {
6397 PRINT_ADDR(cp->cmd);
6398 printk ("wide msgin: ");
6399 (void) ncr_show_msg (np->msgin);
6404 ** get requested values.
6408 wide = np->msgin[3];
6411 ** if target sends WDTR message,
6412 ** it CAN transfer wide.
6415 if (wide && tp->starget)
6416 spi_support_wide(tp->starget) = 1;
6419 ** check values against driver limits.
6422 if (wide > tp->usrwide)
6423 {chg = 1; wide = tp->usrwide;}
6425 if (DEBUG_FLAGS & DEBUG_NEGO) {
6426 PRINT_ADDR(cp->cmd);
6427 printk ("wide: wide=%d chg=%d.\n", wide, chg);
6430 if (INB (HS_PRT) == HS_NEGOTIATE) {
6431 OUTB (HS_PRT, HS_BUSY);
6432 switch (cp->nego_status) {
6436 ** This was an answer message
6440 ** Answer wasn't acceptable.
6442 ncr_setwide (np, cp, 0, 1);
6443 spi_width(starget) = 0;
6444 OUTL_DSP (NCB_SCRIPT_PHYS (np, msg_bad));
6449 ncr_setwide (np, cp, wide, 1);
6450 spi_width(starget) = wide;
6451 OUTL_DSP (NCB_SCRIPT_PHYS (np, clrack));
6456 ncr_setsync (np, cp, 0, 0xe0);
6457 spi_period(starget) = 0;
6458 spi_offset(starget) = 0;
6464 ** It was a request, set value and
6465 ** prepare an answer message
6468 ncr_setwide (np, cp, wide, 1);
6469 spi_width(starget) = wide;
6471 np->msgout[0] = M_EXTENDED;
6473 np->msgout[2] = M_X_WIDE_REQ;
6474 np->msgout[3] = wide;
6476 np->msgin [0] = M_NOOP;
6478 cp->nego_status = NS_WIDE;
6480 if (DEBUG_FLAGS & DEBUG_NEGO) {
6481 PRINT_ADDR(cp->cmd);
6482 printk ("wide msgout: ");
6483 (void) ncr_show_msg (np->msgin);
6488 /*--------------------------------------------------------------------
6490 ** Processing of special messages
6492 **--------------------------------------------------------------------
6495 case SIR_REJECT_RECEIVED:
6496 /*-----------------------------------------------
6498 ** We received a M_REJECT message.
6500 **-----------------------------------------------
6503 PRINT_ADDR(cp->cmd);
6504 printk ("M_REJECT received (%x:%x).\n",
6505 (unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
6508 case SIR_REJECT_SENT:
6509 /*-----------------------------------------------
6511 ** We received an unknown message
6513 **-----------------------------------------------
6516 PRINT_ADDR(cp->cmd);
6517 printk ("M_REJECT sent for ");
6518 (void) ncr_show_msg (np->msgin);
6522 /*--------------------------------------------------------------------
6524 ** Processing of special messages
6526 **--------------------------------------------------------------------
6529 case SIR_IGN_RESIDUE:
6530 /*-----------------------------------------------
6532 ** We received an IGNORE RESIDUE message,
6533 ** which couldn't be handled by the script.
6535 **-----------------------------------------------
6538 PRINT_ADDR(cp->cmd);
6539 printk ("M_IGN_RESIDUE received, but not yet implemented.\n");
6542 case SIR_MISSING_SAVE:
6543 /*-----------------------------------------------
6545 ** We received an DISCONNECT message,
6546 ** but the datapointer wasn't saved before.
6548 **-----------------------------------------------
6551 PRINT_ADDR(cp->cmd);
6552 printk ("M_DISCONNECT received, but datapointer not saved: "
6553 "data=%x save=%x goal=%x.\n",
6554 (unsigned) INL (nc_temp),
6555 (unsigned) scr_to_cpu(np->header.savep),
6556 (unsigned) scr_to_cpu(np->header.goalp));
6565 /*==========================================================
6568 ** Acquire a control block
6571 **==========================================================
6574 static struct ccb *ncr_get_ccb (struct ncb *np, u_char tn, u_char ln)
6576 struct tcb *tp = &np->target[tn];
6577 struct lcb *lp = tp->lp[ln];
6578 u_char tag = NO_TAG;
6579 struct ccb *cp = NULL;
6582 ** Lun structure available ?
6585 struct list_head *qp;
6587 ** Keep from using more tags than we can handle.
6589 if (lp->usetags && lp->busyccbs >= lp->maxnxs)
6593 ** Allocate a new CCB if needed.
6595 if (list_empty(&lp->free_ccbq))
6596 ncr_alloc_ccb(np, tn, ln);
6599 ** Look for free CCB
6601 qp = ncr_list_pop(&lp->free_ccbq);
6603 cp = list_entry(qp, struct ccb, link_ccbq);
6605 PRINT_LUN(np, tn, ln);
6606 printk ("ccb free list corrupted (@%p)\n", cp);
6609 list_add_tail(qp, &lp->wait_ccbq);
6615 ** If a CCB is available,
6616 ** Get a tag for this nexus if required.
6620 tag = lp->cb_tags[lp->ia_tag];
6622 else if (lp->actccbs > 0)
6627 ** if nothing available, take the default.
6633 ** Wait until available.
6637 if (flags & SCSI_NOSLEEP) break;
6638 if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
6649 ** Move to next available tag if tag used.
6652 if (tag != NO_TAG) {
6654 if (lp->ia_tag == MAX_TAGS)
6656 lp->tags_umap |= (((tagmap_t) 1) << tag);
6661 ** Remember all informations needed to free this CCB.
6667 if (DEBUG_FLAGS & DEBUG_TAGS) {
6668 PRINT_LUN(np, tn, ln);
6669 printk ("ccb @%p using tag %d.\n", cp, tag);
6675 /*==========================================================
6678 ** Release one control block
6681 **==========================================================
6684 static void ncr_free_ccb (struct ncb *np, struct ccb *cp)
6686 struct tcb *tp = &np->target[cp->target];
6687 struct lcb *lp = tp->lp[cp->lun];
6689 if (DEBUG_FLAGS & DEBUG_TAGS) {
6690 PRINT_LUN(np, cp->target, cp->lun);
6691 printk ("ccb @%p freeing tag %d.\n", cp, cp->tag);
6695 ** If lun control block available,
6696 ** decrement active commands and increment credit,
6697 ** free the tag if any and remove the JUMP for reselect.
6700 if (cp->tag != NO_TAG) {
6701 lp->cb_tags[lp->if_tag++] = cp->tag;
6702 if (lp->if_tag == MAX_TAGS)
6704 lp->tags_umap &= ~(((tagmap_t) 1) << cp->tag);
6705 lp->tags_smap &= lp->tags_umap;
6706 lp->jump_ccb[cp->tag] =
6707 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l_q));
6710 cpu_to_scr(NCB_SCRIPTH_PHYS(np, bad_i_t_l));
6715 ** Make this CCB available.
6720 list_move(&cp->link_ccbq, &lp->free_ccbq);
6726 cp -> host_status = HS_IDLE;
6735 wakeup ((caddr_t) cp);
6740 #define ncr_reg_bus_addr(r) (np->paddr + offsetof (struct ncr_reg, r))
6742 /*------------------------------------------------------------------------
6743 ** Initialize the fixed part of a CCB structure.
6744 **------------------------------------------------------------------------
6745 **------------------------------------------------------------------------
6747 static void ncr_init_ccb(struct ncb *np, struct ccb *cp)
6749 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
6752 ** Remember virtual and bus address of this ccb.
6754 cp->p_ccb = vtobus(cp);
6755 cp->phys.header.cp = cp;
6758 ** This allows list_del to work for the default ccb.
6760 INIT_LIST_HEAD(&cp->link_ccbq);
6763 ** Initialyze the start and restart launch script.
6765 ** COPY(4) @(...p_phys), @(dsa)
6766 ** JUMP @(sched_point)
6768 cp->start.setup_dsa[0] = cpu_to_scr(copy_4);
6769 cp->start.setup_dsa[1] = cpu_to_scr(CCB_PHYS(cp, start.p_phys));
6770 cp->start.setup_dsa[2] = cpu_to_scr(ncr_reg_bus_addr(nc_dsa));
6771 cp->start.schedule.l_cmd = cpu_to_scr(SCR_JUMP);
6772 cp->start.p_phys = cpu_to_scr(CCB_PHYS(cp, phys));
6774 memcpy(&cp->restart, &cp->start, sizeof(cp->restart));
6776 cp->start.schedule.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
6777 cp->restart.schedule.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
6781 /*------------------------------------------------------------------------
6782 ** Allocate a CCB and initialize its fixed part.
6783 **------------------------------------------------------------------------
6784 **------------------------------------------------------------------------
6786 static void ncr_alloc_ccb(struct ncb *np, u_char tn, u_char ln)
6788 struct tcb *tp = &np->target[tn];
6789 struct lcb *lp = tp->lp[ln];
6790 struct ccb *cp = NULL;
6793 ** Allocate memory for this CCB.
6795 cp = m_calloc_dma(sizeof(struct ccb), "CCB");
6800 ** Count it and initialyze it.
6804 memset(cp, 0, sizeof (*cp));
6805 ncr_init_ccb(np, cp);
6808 ** Chain into wakeup list and free ccb queue and take it
6809 ** into account for tagged commands.
6811 cp->link_ccb = np->ccb->link_ccb;
6812 np->ccb->link_ccb = cp;
6814 list_add(&cp->link_ccbq, &lp->free_ccbq);
6817 /*==========================================================
6820 ** Allocation of resources for Targets/Luns/Tags.
6823 **==========================================================
6827 /*------------------------------------------------------------------------
6828 ** Target control block initialisation.
6829 **------------------------------------------------------------------------
6830 ** This data structure is fully initialized after a SCSI command
6831 ** has been successfully completed for this target.
6832 ** It contains a SCRIPT that is called on target reselection.
6833 **------------------------------------------------------------------------
6835 static void ncr_init_tcb (struct ncb *np, u_char tn)
6837 struct tcb *tp = &np->target[tn];
6838 ncrcmd copy_1 = np->features & FE_PFEN ? SCR_COPY(1) : SCR_COPY_F(1);
6843 ** Jump to next tcb if SFBR does not match this target.
6844 ** JUMP IF (SFBR != #target#), @(next tcb)
6846 tp->jump_tcb.l_cmd =
6847 cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (0x80 + tn))));
6848 tp->jump_tcb.l_paddr = np->jump_tcb[th].l_paddr;
6851 ** Load the synchronous transfer register.
6852 ** COPY @(tp->sval), @(sxfer)
6854 tp->getscr[0] = cpu_to_scr(copy_1);
6855 tp->getscr[1] = cpu_to_scr(vtobus (&tp->sval));
6856 #ifdef SCSI_NCR_BIG_ENDIAN
6857 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer) ^ 3);
6859 tp->getscr[2] = cpu_to_scr(ncr_reg_bus_addr(nc_sxfer));
6863 ** Load the timing register.
6864 ** COPY @(tp->wval), @(scntl3)
6866 tp->getscr[3] = cpu_to_scr(copy_1);
6867 tp->getscr[4] = cpu_to_scr(vtobus (&tp->wval));
6868 #ifdef SCSI_NCR_BIG_ENDIAN
6869 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3) ^ 3);
6871 tp->getscr[5] = cpu_to_scr(ncr_reg_bus_addr(nc_scntl3));
6875 ** Get the IDENTIFY message and the lun.
6876 ** CALL @script(resel_lun)
6878 tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL);
6879 tp->call_lun.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
6882 ** Look for the lun control block of this nexus.
6884 ** JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
6886 for (i = 0 ; i < 4 ; i++) {
6887 tp->jump_lcb[i].l_cmd =
6888 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
6889 tp->jump_lcb[i].l_paddr =
6890 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_identify));
6894 ** Link this target control block to the JUMP chain.
6896 np->jump_tcb[th].l_paddr = cpu_to_scr(vtobus (&tp->jump_tcb));
6899 ** These assert's should be moved at driver initialisations.
6901 #ifdef SCSI_NCR_BIG_ENDIAN
6902 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
6903 offsetof(struct tcb , sval )) &3) != 3);
6904 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
6905 offsetof(struct tcb , wval )) &3) != 3);
6907 BUG_ON(((offsetof(struct ncr_reg, nc_sxfer) ^
6908 offsetof(struct tcb , sval )) &3) != 0);
6909 BUG_ON(((offsetof(struct ncr_reg, nc_scntl3) ^
6910 offsetof(struct tcb , wval )) &3) != 0);
6915 /*------------------------------------------------------------------------
6916 ** Lun control block allocation and initialization.
6917 **------------------------------------------------------------------------
6918 ** This data structure is allocated and initialized after a SCSI
6919 ** command has been successfully completed for this target/lun.
6920 **------------------------------------------------------------------------
6922 static struct lcb *ncr_alloc_lcb (struct ncb *np, u_char tn, u_char ln)
6924 struct tcb *tp = &np->target[tn];
6925 struct lcb *lp = tp->lp[ln];
6926 ncrcmd copy_4 = np->features & FE_PFEN ? SCR_COPY(4) : SCR_COPY_F(4);
6930 ** Already done, return.
6936 ** Allocate the lcb.
6938 lp = m_calloc_dma(sizeof(struct lcb), "LCB");
6941 memset(lp, 0, sizeof(*lp));
6945 ** Initialize the target control block if not yet.
6947 if (!tp->jump_tcb.l_cmd)
6948 ncr_init_tcb(np, tn);
6951 ** Initialize the CCB queue headers.
6953 INIT_LIST_HEAD(&lp->free_ccbq);
6954 INIT_LIST_HEAD(&lp->busy_ccbq);
6955 INIT_LIST_HEAD(&lp->wait_ccbq);
6956 INIT_LIST_HEAD(&lp->skip_ccbq);
6959 ** Set max CCBs to 1 and use the default 1 entry
6960 ** jump table by default.
6963 lp->jump_ccb = &lp->jump_ccb_0;
6964 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
6967 ** Initilialyze the reselect script:
6969 ** Jump to next lcb if SFBR does not match this lun.
6970 ** Load TEMP with the CCB direct jump table bus address.
6971 ** Get the SIMPLE TAG message and the tag.
6973 ** JUMP IF (SFBR != #lun#), @(next lcb)
6974 ** COPY @(lp->p_jump_ccb), @(temp)
6975 ** JUMP @script(resel_notag)
6977 lp->jump_lcb.l_cmd =
6978 cpu_to_scr((SCR_JUMP ^ IFFALSE (MASK (0x80+ln, 0xff))));
6979 lp->jump_lcb.l_paddr = tp->jump_lcb[lh].l_paddr;
6981 lp->load_jump_ccb[0] = cpu_to_scr(copy_4);
6982 lp->load_jump_ccb[1] = cpu_to_scr(vtobus (&lp->p_jump_ccb));
6983 lp->load_jump_ccb[2] = cpu_to_scr(ncr_reg_bus_addr(nc_temp));
6985 lp->jump_tag.l_cmd = cpu_to_scr(SCR_JUMP);
6986 lp->jump_tag.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_notag));
6989 ** Link this lun control block to the JUMP chain.
6991 tp->jump_lcb[lh].l_paddr = cpu_to_scr(vtobus (&lp->jump_lcb));
6994 ** Initialize command queuing control.
7004 /*------------------------------------------------------------------------
7005 ** Lun control block setup on INQUIRY data received.
7006 **------------------------------------------------------------------------
7007 ** We only support WIDE, SYNC for targets and CMDQ for logical units.
7008 ** This setup is done on each INQUIRY since we are expecting user
7009 ** will play with CHANGE DEFINITION commands. :-)
7010 **------------------------------------------------------------------------
7012 static struct lcb *ncr_setup_lcb (struct ncb *np, struct scsi_device *sdev)
7014 unsigned char tn = sdev->id, ln = sdev->lun;
7015 struct tcb *tp = &np->target[tn];
7016 struct lcb *lp = tp->lp[ln];
7017 struct scsi_target *starget = tp->starget;
7020 ** If no lcb, try to allocate it.
7022 if (!lp && !(lp = ncr_alloc_lcb(np, tn, ln)))
7026 ** Prepare negotiation
7028 if (spi_support_wide(starget) || spi_support_sync(starget))
7029 ncr_negotiate(np, tp);
7032 ** If unit supports tagged commands, allocate the
7033 ** CCB JUMP table if not yet.
7035 if (sdev->tagged_supported && lp->jump_ccb == &lp->jump_ccb_0) {
7037 lp->jump_ccb = m_calloc_dma(256, "JUMP_CCB");
7038 if (!lp->jump_ccb) {
7039 lp->jump_ccb = &lp->jump_ccb_0;
7042 lp->p_jump_ccb = cpu_to_scr(vtobus(lp->jump_ccb));
7043 for (i = 0 ; i < 64 ; i++)
7045 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_i_t_l_q));
7046 for (i = 0 ; i < MAX_TAGS ; i++)
7048 lp->maxnxs = MAX_TAGS;
7049 lp->tags_stime = ktime_get(3*HZ);
7050 ncr_setup_tags (np, sdev);
7058 /*==========================================================
7061 ** Build Scatter Gather Block
7064 **==========================================================
7066 ** The transfer area may be scattered among
7067 ** several non adjacent physical pages.
7069 ** We may use MAX_SCATTER blocks.
7071 **----------------------------------------------------------
7075 ** We try to reduce the number of interrupts caused
7076 ** by unexpected phase changes due to disconnects.
7077 ** A typical harddisk may disconnect before ANY block.
7078 ** If we wanted to avoid unexpected phase changes at all
7079 ** we had to use a break point every 512 bytes.
7080 ** Of course the number of scatter/gather blocks is
7082 ** Under Linux, the scatter/gatter blocks are provided by
7083 ** the generic driver. We just have to copy addresses and
7084 ** sizes to the data segment array.
7087 static int ncr_scatter_no_sglist(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd)
7089 struct scr_tblmove *data = &cp->phys.data[MAX_SCATTER - 1];
7092 cp->data_len = cmd->request_bufflen;
7094 if (cmd->request_bufflen) {
7095 dma_addr_t baddr = map_scsi_single_data(np, cmd);
7097 ncr_build_sge(np, data, baddr, cmd->request_bufflen);
7109 static int ncr_scatter(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd)
7112 int use_sg = (int) cmd->use_sg;
7117 segment = ncr_scatter_no_sglist(np, cp, cmd);
7118 else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
7119 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
7120 struct scr_tblmove *data;
7122 if (use_sg > MAX_SCATTER) {
7123 unmap_scsi_data(np, cmd);
7127 data = &cp->phys.data[MAX_SCATTER - use_sg];
7129 for (segment = 0; segment < use_sg; segment++) {
7130 dma_addr_t baddr = sg_dma_address(&scatter[segment]);
7131 unsigned int len = sg_dma_len(&scatter[segment]);
7133 ncr_build_sge(np, &data[segment], baddr, len);
7134 cp->data_len += len;
7143 /*==========================================================
7146 ** Test the bus snoop logic :-(
7148 ** Has to be called with interrupts disabled.
7151 **==========================================================
7154 static int __init ncr_regtest (struct ncb* np)
7156 register volatile u32 data;
7158 ** ncr registers may NOT be cached.
7159 ** write 0xffffffff to a read only register area,
7160 ** and try to read it back.
7163 OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
7164 data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
7166 if (data == 0xffffffff) {
7168 if ((data & 0xe2f0fffd) != 0x02000080) {
7170 printk ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
7177 static int __init ncr_snooptest (struct ncb* np)
7179 u32 ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc;
7182 err |= ncr_regtest (np);
7188 pc = NCB_SCRIPTH_PHYS (np, snooptest);
7192 ** Set memory and register.
7194 np->ncr_cache = cpu_to_scr(host_wr);
7195 OUTL (nc_temp, ncr_wr);
7197 ** Start script (exchange values)
7201 ** Wait 'til done (with timeout)
7203 for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
7204 if (INB(nc_istat) & (INTF|SIP|DIP))
7207 ** Save termination position.
7211 ** Read memory and register.
7213 host_rd = scr_to_cpu(np->ncr_cache);
7214 ncr_rd = INL (nc_scratcha);
7215 ncr_bk = INL (nc_temp);
7219 ncr_chip_reset(np, 100);
7221 ** check for timeout
7223 if (i>=NCR_SNOOP_TIMEOUT) {
7224 printk ("CACHE TEST FAILED: timeout.\n");
7228 ** Check termination position.
7230 if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
7231 printk ("CACHE TEST FAILED: script execution failed.\n");
7232 printk ("start=%08lx, pc=%08lx, end=%08lx\n",
7233 (u_long) NCB_SCRIPTH_PHYS (np, snooptest), (u_long) pc,
7234 (u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
7240 if (host_wr != ncr_rd) {
7241 printk ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
7242 (int) host_wr, (int) ncr_rd);
7245 if (host_rd != ncr_wr) {
7246 printk ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
7247 (int) ncr_wr, (int) host_rd);
7250 if (ncr_bk != ncr_wr) {
7251 printk ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
7252 (int) ncr_wr, (int) ncr_bk);
7258 /*==========================================================
7260 ** Determine the ncr's clock frequency.
7261 ** This is essential for the negotiation
7262 ** of the synchronous transfer rate.
7264 **==========================================================
7266 ** Note: we have to return the correct value.
7267 ** THERE IS NO SAVE DEFAULT VALUE.
7269 ** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
7270 ** 53C860 and 53C875 rev. 1 support fast20 transfers but
7271 ** do not have a clock doubler and so are provided with a
7272 ** 80 MHz clock. All other fast20 boards incorporate a doubler
7273 ** and so should be delivered with a 40 MHz clock.
7274 ** The future fast40 chips (895/895) use a 40 Mhz base clock
7275 ** and provide a clock quadrupler (160 Mhz). The code below
7276 ** tries to deal as cleverly as possible with all this stuff.
7278 **----------------------------------------------------------
7282 * Select NCR SCSI clock frequency
7284 static void ncr_selectclock(struct ncb *np, u_char scntl3)
7286 if (np->multiplier < 2) {
7287 OUTB(nc_scntl3, scntl3);
7291 if (bootverbose >= 2)
7292 printk ("%s: enabling clock multiplier\n", ncr_name(np));
7294 OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
7295 if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
7297 while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
7300 printk("%s: the chip cannot lock the frequency\n", ncr_name(np));
7301 } else /* Wait 20 micro-seconds for doubler */
7303 OUTB(nc_stest3, HSC); /* Halt the scsi clock */
7304 OUTB(nc_scntl3, scntl3);
7305 OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
7306 OUTB(nc_stest3, 0x00); /* Restart scsi clock */
7311 * calculate NCR SCSI clock frequency (in KHz)
7313 static unsigned __init ncrgetfreq (struct ncb *np, int gen)
7319 * Measure GEN timer delay in order
7320 * to calculate SCSI clock frequency
7322 * This code will never execute too
7323 * many loop iterations (if DELAY is
7324 * reasonably correct). It could get
7325 * too low a delay (too high a freq.)
7326 * if the CPU is slow executing the
7327 * loop for some reason (an NMI, for
7328 * example). For this reason we will
7329 * if multiple measurements are to be
7330 * performed trust the higher delay
7331 * (lower frequency returned).
7333 OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
7334 OUTW (nc_sien , 0); /* mask all scsi interrupts */
7335 (void) INW (nc_sist); /* clear pending scsi interrupt */
7336 OUTB (nc_dien , 0); /* mask all dma interrupts */
7337 (void) INW (nc_sist); /* another one, just to be sure :) */
7338 OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
7339 OUTB (nc_stime1, 0); /* disable general purpose timer */
7340 OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
7341 while (!(INW(nc_sist) & GEN) && ms++ < 100000) {
7342 for (count = 0; count < 10; count ++)
7343 udelay(100); /* count ms */
7345 OUTB (nc_stime1, 0); /* disable general purpose timer */
7347 * set prescaler to divide by whatever 0 means
7348 * 0 ought to choose divide by 2, but appears
7349 * to set divide by 3.5 mode in my 53c810 ...
7351 OUTB (nc_scntl3, 0);
7353 if (bootverbose >= 2)
7354 printk ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
7356 * adjust for prescaler, and convert into KHz
7358 return ms ? ((1 << gen) * 4340) / ms : 0;
7362 * Get/probe NCR SCSI clock frequency
7364 static void __init ncr_getclock (struct ncb *np, int mult)
7366 unsigned char scntl3 = INB(nc_scntl3);
7367 unsigned char stest1 = INB(nc_stest1);
7374 ** True with 875 or 895 with clock multiplier selected
7376 if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
7377 if (bootverbose >= 2)
7378 printk ("%s: clock multiplier found\n", ncr_name(np));
7379 np->multiplier = mult;
7383 ** If multiplier not found or scntl3 not 7,5,3,
7384 ** reset chip and get frequency from general purpose timer.
7385 ** Otherwise trust scntl3 BIOS setting.
7387 if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
7390 ncr_chip_reset(np, 5);
7392 (void) ncrgetfreq (np, 11); /* throw away first result */
7393 f1 = ncrgetfreq (np, 11);
7394 f2 = ncrgetfreq (np, 11);
7397 printk ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
7399 if (f1 > f2) f1 = f2; /* trust lower result */
7401 if (f1 < 45000) f1 = 40000;
7402 else if (f1 < 55000) f1 = 50000;
7405 if (f1 < 80000 && mult > 1) {
7406 if (bootverbose >= 2)
7407 printk ("%s: clock multiplier assumed\n", ncr_name(np));
7408 np->multiplier = mult;
7411 if ((scntl3 & 7) == 3) f1 = 40000;
7412 else if ((scntl3 & 7) == 5) f1 = 80000;
7415 f1 /= np->multiplier;
7419 ** Compute controller synchronous parameters.
7421 f1 *= np->multiplier;
7425 /*===================== LINUX ENTRY POINTS SECTION ==========================*/
7427 static int ncr53c8xx_slave_configure(struct scsi_device *device)
7429 struct Scsi_Host *host = device->host;
7430 struct ncb *np = ((struct host_data *) host->hostdata)->ncb;
7431 struct tcb *tp = &np->target[device->id];
7432 struct lcb *lp = tp->lp[device->lun];
7433 int numtags, depth_to_use;
7435 tp->starget = device->sdev_target;
7437 ncr_setup_lcb(np, device);
7440 ** Select queue depth from driver setup.
7441 ** Donnot use more than configured by user.
7443 ** Donnot use more than our maximum.
7445 numtags = device_queue_depth(np->unit, device->id, device->lun);
7446 if (numtags > tp->usrtags)
7447 numtags = tp->usrtags;
7448 if (!device->tagged_supported)
7450 depth_to_use = numtags;
7451 if (depth_to_use < 2)
7453 if (depth_to_use > MAX_TAGS)
7454 depth_to_use = MAX_TAGS;
7456 scsi_adjust_queue_depth(device,
7457 (device->tagged_supported ?
7458 MSG_SIMPLE_TAG : 0),
7462 ** Since the queue depth is not tunable under Linux,
7463 ** we need to know this value in order not to
7464 ** announce stupid things to user.
7466 ** XXX(hch): As of Linux 2.6 it certainly _is_ tunable..
7467 ** In fact we just tuned it, or did I miss
7468 ** something important? :)
7471 lp->numtags = lp->maxtags = numtags;
7472 lp->scdev_depth = depth_to_use;
7474 ncr_setup_tags (np, device);
7476 #ifdef DEBUG_NCR53C8XX
7477 printk("ncr53c8xx_select_queue_depth: host=%d, id=%d, lun=%d, depth=%d\n",
7478 np->unit, device->id, device->lun, depth_to_use);
7481 if (spi_support_sync(device->sdev_target) &&
7482 !spi_initial_dv(device->sdev_target))
7483 spi_dv_device(device);
7487 static int ncr53c8xx_queue_command (struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
7489 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
7490 unsigned long flags;
7493 #ifdef DEBUG_NCR53C8XX
7494 printk("ncr53c8xx_queue_command\n");
7497 cmd->scsi_done = done;
7498 cmd->host_scribble = NULL;
7499 cmd->__data_mapped = 0;
7500 cmd->__data_mapping = 0;
7502 spin_lock_irqsave(&np->smp_lock, flags);
7504 if ((sts = ncr_queue_command(np, cmd)) != DID_OK) {
7505 cmd->result = ScsiResult(sts, 0);
7506 #ifdef DEBUG_NCR53C8XX
7507 printk("ncr53c8xx : command not queued - result=%d\n", sts);
7510 #ifdef DEBUG_NCR53C8XX
7512 printk("ncr53c8xx : command successfully queued\n");
7515 spin_unlock_irqrestore(&np->smp_lock, flags);
7517 if (sts != DID_OK) {
7518 unmap_scsi_data(np, cmd);
7526 irqreturn_t ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
7528 unsigned long flags;
7529 struct Scsi_Host *shost = (struct Scsi_Host *)dev_id;
7530 struct host_data *host_data = (struct host_data *)shost->hostdata;
7531 struct ncb *np = host_data->ncb;
7532 struct scsi_cmnd *done_list;
7534 #ifdef DEBUG_NCR53C8XX
7535 printk("ncr53c8xx : interrupt received\n");
7538 if (DEBUG_FLAGS & DEBUG_TINY) printk ("[");
7540 spin_lock_irqsave(&np->smp_lock, flags);
7542 done_list = np->done_list;
7543 np->done_list = NULL;
7544 spin_unlock_irqrestore(&np->smp_lock, flags);
7546 if (DEBUG_FLAGS & DEBUG_TINY) printk ("]\n");
7549 ncr_flush_done_cmds(done_list);
7553 static void ncr53c8xx_timeout(unsigned long npref)
7555 struct ncb *np = (struct ncb *) npref;
7556 unsigned long flags;
7557 struct scsi_cmnd *done_list;
7559 spin_lock_irqsave(&np->smp_lock, flags);
7561 done_list = np->done_list;
7562 np->done_list = NULL;
7563 spin_unlock_irqrestore(&np->smp_lock, flags);
7566 ncr_flush_done_cmds(done_list);
7569 static int ncr53c8xx_bus_reset(struct scsi_cmnd *cmd)
7571 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
7573 unsigned long flags;
7574 struct scsi_cmnd *done_list;
7577 * If the mid-level driver told us reset is synchronous, it seems
7578 * that we must call the done() callback for the involved command,
7579 * even if this command was not queued to the low-level driver,
7580 * before returning SUCCESS.
7583 spin_lock_irqsave(&np->smp_lock, flags);
7584 sts = ncr_reset_bus(np, cmd, 1);
7586 done_list = np->done_list;
7587 np->done_list = NULL;
7588 spin_unlock_irqrestore(&np->smp_lock, flags);
7590 ncr_flush_done_cmds(done_list);
7595 #if 0 /* unused and broken */
7596 static int ncr53c8xx_abort(struct scsi_cmnd *cmd)
7598 struct ncb *np = ((struct host_data *) cmd->device->host->hostdata)->ncb;
7600 unsigned long flags;
7601 struct scsi_cmnd *done_list;
7603 #if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
7604 printk("ncr53c8xx_abort: pid=%lu serial_number=%ld serial_number_at_timeout=%ld\n",
7605 cmd->pid, cmd->serial_number, cmd->serial_number_at_timeout);
7607 printk("ncr53c8xx_abort: command pid %lu\n", cmd->pid);
7610 NCR_LOCK_NCB(np, flags);
7612 #if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
7614 * We have to just ignore abort requests in some situations.
7616 if (cmd->serial_number != cmd->serial_number_at_timeout) {
7617 sts = SCSI_ABORT_NOT_RUNNING;
7622 sts = ncr_abort_command(np, cmd);
7624 done_list = np->done_list;
7625 np->done_list = NULL;
7626 NCR_UNLOCK_NCB(np, flags);
7628 ncr_flush_done_cmds(done_list);
7636 ** Scsi command waiting list management.
7638 ** It may happen that we cannot insert a scsi command into the start queue,
7639 ** in the following circumstances.
7640 ** Too few preallocated ccb(s),
7641 ** maxtags < cmd_per_lun of the Linux host control block,
7643 ** Such scsi commands are inserted into a waiting list.
7644 ** When a scsi command complete, we try to requeue the commands of the
7648 #define next_wcmd host_scribble
7650 static void insert_into_waiting_list(struct ncb *np, struct scsi_cmnd *cmd)
7652 struct scsi_cmnd *wcmd;
7654 #ifdef DEBUG_WAITING_LIST
7655 printk("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
7657 cmd->next_wcmd = NULL;
7658 if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
7660 while ((wcmd->next_wcmd) != 0)
7661 wcmd = (struct scsi_cmnd *) wcmd->next_wcmd;
7662 wcmd->next_wcmd = (char *) cmd;
7666 static struct scsi_cmnd *retrieve_from_waiting_list(int to_remove, struct ncb *np, struct scsi_cmnd *cmd)
7668 struct scsi_cmnd **pcmd = &np->waiting_list;
7673 *pcmd = (struct scsi_cmnd *) cmd->next_wcmd;
7674 cmd->next_wcmd = NULL;
7676 #ifdef DEBUG_WAITING_LIST
7677 printk("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
7681 pcmd = (struct scsi_cmnd **) &(*pcmd)->next_wcmd;
7686 static void process_waiting_list(struct ncb *np, int sts)
7688 struct scsi_cmnd *waiting_list, *wcmd;
7690 waiting_list = np->waiting_list;
7691 np->waiting_list = NULL;
7693 #ifdef DEBUG_WAITING_LIST
7694 if (waiting_list) printk("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
7696 while ((wcmd = waiting_list) != 0) {
7697 waiting_list = (struct scsi_cmnd *) wcmd->next_wcmd;
7698 wcmd->next_wcmd = NULL;
7699 if (sts == DID_OK) {
7700 #ifdef DEBUG_WAITING_LIST
7701 printk("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
7703 sts = ncr_queue_command(np, wcmd);
7705 if (sts != DID_OK) {
7706 #ifdef DEBUG_WAITING_LIST
7707 printk("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
7709 wcmd->result = ScsiResult(sts, 0);
7710 ncr_queue_done_cmd(np, wcmd);
7717 static ssize_t show_ncr53c8xx_revision(struct class_device *dev, char *buf)
7719 struct Scsi_Host *host = class_to_shost(dev);
7720 struct host_data *host_data = (struct host_data *)host->hostdata;
7722 return snprintf(buf, 20, "0x%x\n", host_data->ncb->revision_id);
7725 static struct class_device_attribute ncr53c8xx_revision_attr = {
7726 .attr = { .name = "revision", .mode = S_IRUGO, },
7727 .show = show_ncr53c8xx_revision,
7730 static struct class_device_attribute *ncr53c8xx_host_attrs[] = {
7731 &ncr53c8xx_revision_attr,
7735 /*==========================================================
7737 ** Boot command line.
7739 **==========================================================
7742 char *ncr53c8xx; /* command line passed by insmod */
7743 module_param(ncr53c8xx, charp, 0);
7746 static int __init ncr53c8xx_setup(char *str)
7748 return sym53c8xx__setup(str);
7752 __setup("ncr53c8xx=", ncr53c8xx_setup);
7757 * Host attach and initialisations.
7759 * Allocate host data and ncb structure.
7760 * Request IO region and remap MMIO region.
7761 * Do chip initialization.
7762 * If all is OK, install interrupt handling and
7763 * start the timer daemon.
7765 struct Scsi_Host * __init ncr_attach(struct scsi_host_template *tpnt,
7766 int unit, struct ncr_device *device)
7768 struct host_data *host_data;
7769 struct ncb *np = NULL;
7770 struct Scsi_Host *instance = NULL;
7775 tpnt->name = SCSI_NCR_DRIVER_NAME;
7776 if (!tpnt->shost_attrs)
7777 tpnt->shost_attrs = ncr53c8xx_host_attrs;
7779 tpnt->queuecommand = ncr53c8xx_queue_command;
7780 tpnt->slave_configure = ncr53c8xx_slave_configure;
7781 tpnt->eh_bus_reset_handler = ncr53c8xx_bus_reset;
7782 tpnt->can_queue = SCSI_NCR_CAN_QUEUE;
7784 tpnt->sg_tablesize = SCSI_NCR_SG_TABLESIZE;
7785 tpnt->cmd_per_lun = SCSI_NCR_CMD_PER_LUN;
7786 tpnt->use_clustering = ENABLE_CLUSTERING;
7788 if (device->differential)
7789 driver_setup.diff_support = device->differential;
7791 printk(KERN_INFO "ncr53c720-%d: rev 0x%x irq %d\n",
7792 unit, device->chip.revision_id, device->slot.irq);
7794 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
7797 host_data = (struct host_data *) instance->hostdata;
7799 np = __m_calloc_dma(device->dev, sizeof(struct ncb), "NCB");
7802 spin_lock_init(&np->smp_lock);
7803 np->dev = device->dev;
7804 np->p_ncb = vtobus(np);
7805 host_data->ncb = np;
7807 np->ccb = m_calloc_dma(sizeof(struct ccb), "CCB");
7811 /* Store input information in the host data structure. */
7813 np->verbose = driver_setup.verbose;
7814 sprintf(np->inst_name, "ncr53c720-%d", np->unit);
7815 np->revision_id = device->chip.revision_id;
7816 np->features = device->chip.features;
7817 np->clock_divn = device->chip.nr_divisor;
7818 np->maxoffs = device->chip.offset_max;
7819 np->maxburst = device->chip.burst_max;
7820 np->myaddr = device->host_id;
7822 /* Allocate SCRIPTS areas. */
7823 np->script0 = m_calloc_dma(sizeof(struct script), "SCRIPT");
7826 np->scripth0 = m_calloc_dma(sizeof(struct scripth), "SCRIPTH");
7830 init_timer(&np->timer);
7831 np->timer.data = (unsigned long) np;
7832 np->timer.function = ncr53c8xx_timeout;
7834 /* Try to map the controller chip to virtual and physical memory. */
7836 np->paddr = device->slot.base;
7837 np->paddr2 = (np->features & FE_RAM) ? device->slot.base_2 : 0;
7839 if (device->slot.base_v)
7840 np->vaddr = device->slot.base_v;
7842 np->vaddr = ioremap(device->slot.base_c, 128);
7846 "%s: can't map memory mapped IO region\n",ncr_name(np));
7849 if (bootverbose > 1)
7851 "%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
7854 /* Make the controller's registers available. Now the INB INW INL
7855 * OUTB OUTW OUTL macros can be used safely.
7858 np->reg = (struct ncr_reg __iomem *)np->vaddr;
7860 /* Do chip dependent initialization. */
7861 ncr_prepare_setting(np);
7863 if (np->paddr2 && sizeof(struct script) > 4096) {
7865 printk(KERN_WARNING "%s: script too large, NOT using on chip RAM.\n",
7869 instance->max_channel = 0;
7870 instance->this_id = np->myaddr;
7871 instance->max_id = np->maxwide ? 16 : 8;
7872 instance->max_lun = SCSI_NCR_MAX_LUN;
7873 instance->base = (unsigned long) np->reg;
7874 instance->irq = device->slot.irq;
7875 instance->unique_id = device->slot.base;
7876 instance->dma_channel = 0;
7877 instance->cmd_per_lun = MAX_TAGS;
7878 instance->can_queue = (MAX_START-4);
7879 /* This can happen if you forget to call ncr53c8xx_init from
7880 * your module_init */
7881 BUG_ON(!ncr53c8xx_transport_template);
7882 instance->transportt = ncr53c8xx_transport_template;
7883 scsi_set_device(instance, device->dev);
7885 /* Patch script to physical addresses */
7886 ncr_script_fill(&script0, &scripth0);
7888 np->scripth = np->scripth0;
7889 np->p_scripth = vtobus(np->scripth);
7890 np->p_script = (np->paddr2) ? np->paddr2 : vtobus(np->script0);
7892 ncr_script_copy_and_bind(np, (ncrcmd *) &script0,
7893 (ncrcmd *) np->script0, sizeof(struct script));
7894 ncr_script_copy_and_bind(np, (ncrcmd *) &scripth0,
7895 (ncrcmd *) np->scripth0, sizeof(struct scripth));
7896 np->ccb->p_ccb = vtobus (np->ccb);
7898 /* Patch the script for LED support. */
7900 if (np->features & FE_LED0) {
7901 np->script0->idle[0] =
7902 cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
7903 np->script0->reselected[0] =
7904 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
7905 np->script0->start[0] =
7906 cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
7910 * Look for the target control block of this nexus.
7912 * JUMP ^ IFTRUE (MASK (i, 3)), @(next_lcb)
7914 for (i = 0 ; i < 4 ; i++) {
7915 np->jump_tcb[i].l_cmd =
7916 cpu_to_scr((SCR_JUMP ^ IFTRUE (MASK (i, 3))));
7917 np->jump_tcb[i].l_paddr =
7918 cpu_to_scr(NCB_SCRIPTH_PHYS (np, bad_target));
7921 ncr_chip_reset(np, 100);
7923 /* Now check the cache handling of the chipset. */
7925 if (ncr_snooptest(np)) {
7926 printk(KERN_ERR "CACHE INCORRECTLY CONFIGURED.\n");
7930 /* Install the interrupt handler. */
7931 np->irq = device->slot.irq;
7933 /* Initialize the fixed part of the default ccb. */
7934 ncr_init_ccb(np, np->ccb);
7937 * After SCSI devices have been opened, we cannot reset the bus
7938 * safely, so we do it here. Interrupt handler does the real work.
7939 * Process the reset exception if interrupts are not enabled yet.
7940 * Then enable disconnects.
7942 spin_lock_irqsave(&np->smp_lock, flags);
7943 if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
7944 printk(KERN_ERR "%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
7946 spin_unlock_irqrestore(&np->smp_lock, flags);
7954 * The middle-level SCSI driver does not wait for devices to settle.
7955 * Wait synchronously if more than 2 seconds.
7957 if (driver_setup.settle_delay > 2) {
7958 printk(KERN_INFO "%s: waiting %d seconds for scsi devices to settle...\n",
7959 ncr_name(np), driver_setup.settle_delay);
7960 mdelay(1000 * driver_setup.settle_delay);
7963 /* start the timeout daemon */
7967 /* use SIMPLE TAG messages by default */
7968 #ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
7969 np->order = M_SIMPLE_TAG;
7972 spin_unlock_irqrestore(&np->smp_lock, flags);
7979 printk(KERN_INFO "%s: detaching...\n", ncr_name(np));
7983 m_free_dma(np->scripth0, sizeof(struct scripth), "SCRIPTH");
7985 m_free_dma(np->script0, sizeof(struct script), "SCRIPT");
7987 m_free_dma(np->ccb, sizeof(struct ccb), "CCB");
7988 m_free_dma(np, sizeof(struct ncb), "NCB");
7989 host_data->ncb = NULL;
7992 scsi_host_put(instance);
7998 int ncr53c8xx_release(struct Scsi_Host *host)
8000 struct host_data *host_data;
8001 #ifdef DEBUG_NCR53C8XX
8002 printk("ncr53c8xx: release\n");
8006 host_data = (struct host_data *)host->hostdata;
8007 if (host_data && host_data->ncb)
8008 ncr_detach(host_data->ncb);
8012 static void ncr53c8xx_set_period(struct scsi_target *starget, int period)
8014 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8015 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8016 struct tcb *tp = &np->target[starget->id];
8018 if (period > np->maxsync)
8019 period = np->maxsync;
8020 else if (period < np->minsync)
8021 period = np->minsync;
8023 tp->usrsync = period;
8025 ncr_negotiate(np, tp);
8028 static void ncr53c8xx_set_offset(struct scsi_target *starget, int offset)
8030 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8031 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8032 struct tcb *tp = &np->target[starget->id];
8034 if (offset > np->maxoffs)
8035 offset = np->maxoffs;
8036 else if (offset < 0)
8039 tp->maxoffs = offset;
8041 ncr_negotiate(np, tp);
8044 static void ncr53c8xx_set_width(struct scsi_target *starget, int width)
8046 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
8047 struct ncb *np = ((struct host_data *)shost->hostdata)->ncb;
8048 struct tcb *tp = &np->target[starget->id];
8050 if (width > np->maxwide)
8051 width = np->maxwide;
8055 tp->usrwide = width;
8057 ncr_negotiate(np, tp);
8060 static struct spi_function_template ncr53c8xx_transport_functions = {
8061 .set_period = ncr53c8xx_set_period,
8063 .set_offset = ncr53c8xx_set_offset,
8065 .set_width = ncr53c8xx_set_width,
8069 int __init ncr53c8xx_init(void)
8071 ncr53c8xx_transport_template = spi_attach_transport(&ncr53c8xx_transport_functions);
8072 if (!ncr53c8xx_transport_template)
8077 void ncr53c8xx_exit(void)
8079 spi_release_transport(ncr53c8xx_transport_template);
git://git.onelab.eu / linux-2.6.git / blob