/*
- * Common pmac/prep/chrp pci routines. -- Cort
+ * Common prep/chrp pci routines. -- Cort
*/
#include <linux/config.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
+#include <asm/machdep.h>
#undef DEBUG
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
unsigned long pci_dram_offset = 0;
+int pcibios_assign_bus_offset = 1;
void pcibios_make_OF_bus_map(void);
static void pcibios_fixup_resources(struct pci_dev* dev);
static void fixup_broken_pcnet32(struct pci_dev* dev);
static int reparent_resources(struct resource *parent, struct resource *res);
-static void fixup_rev1_53c810(struct pci_dev* dev);
static void fixup_cpc710_pci64(struct pci_dev* dev);
-#ifdef CONFIG_PPC_PMAC
-extern void pmac_pci_fixup_cardbus(struct pci_dev* dev);
-extern void pmac_pci_fixup_pciata(struct pci_dev* dev);
-extern void pmac_pci_fixup_k2_sata(struct pci_dev* dev);
-#endif
#ifdef CONFIG_PPC_OF
static u8* pci_to_OF_bus_map;
#endif
-/* By default, we don't re-assign bus numbers. We do this only on
- * some pmacs
+/* By default, we don't re-assign bus numbers.
*/
-int pci_assign_all_busses;
+int pci_assign_all_buses;
struct pci_controller* hose_head;
struct pci_controller** hose_tail = &hose_head;
static int pci_bus_count;
-struct pci_fixup pcibios_fixups[] = {
- { PCI_FIXUP_HEADER, PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32 },
- { PCI_FIXUP_HEADER, PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810 },
- { PCI_FIXUP_HEADER, PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64},
- { PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources },
-#ifdef CONFIG_PPC_PMAC
- /* We should add per-machine fixup support in xxx_setup.c or xxx_pci.c */
- { PCI_FIXUP_FINAL, PCI_VENDOR_ID_TI, PCI_ANY_ID, pmac_pci_fixup_cardbus },
- { PCI_FIXUP_FINAL, PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata },
- { PCI_FIXUP_HEADER, PCI_VENDOR_ID_SERVERWORKS, 0x0240, pmac_pci_fixup_k2_sata },
-#endif /* CONFIG_PPC_PMAC */
- { 0 }
-};
-
-static void
-fixup_rev1_53c810(struct pci_dev* dev)
-{
- /* rev 1 ncr53c810 chips don't set the class at all which means
- * they don't get their resources remapped. Fix that here.
- */
-
- if ((dev->class == PCI_CLASS_NOT_DEFINED)) {
- printk("NCR 53c810 rev 1 detected, setting PCI class.\n");
- dev->class = PCI_CLASS_STORAGE_SCSI;
- }
-}
-
static void
fixup_broken_pcnet32(struct pci_dev* dev)
{
if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
dev->vendor = PCI_VENDOR_ID_AMD;
pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
- pci_name_device(dev);
}
}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
static void
fixup_cpc710_pci64(struct pci_dev* dev)
dev->resource[1].start = dev->resource[1].end = 0;
dev->resource[1].flags = 0;
}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixup_cpc710_pci64);
static void
pcibios_fixup_resources(struct pci_dev *dev)
struct resource *res = dev->resource + i;
if (!res->flags)
continue;
- if (!res->start || res->end == 0xffffffff) {
+ if (res->end == 0xffffffff) {
DBG("PCI:%s Resource %d [%08lx-%08lx] is unassigned\n",
pci_name(dev), i, res->start, res->end);
res->end -= res->start;
if (ppc_md.pcibios_fixup_resources)
ppc_md.pcibios_fixup_resources(dev);
}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
-void
-pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
struct resource *res)
{
unsigned long offset = 0;
region->start = res->start - offset;
region->end = res->end - offset;
}
+EXPORT_SYMBOL(pcibios_resource_to_bus);
+
+void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+ struct pci_bus_region *region)
+{
+ unsigned long offset = 0;
+ struct pci_controller *hose = dev->sysdata;
+
+ if (hose && res->flags & IORESOURCE_IO)
+ offset = (unsigned long)hose->io_base_virt - isa_io_base;
+ else if (hose && res->flags & IORESOURCE_MEM)
+ offset = hose->pci_mem_offset;
+ res->start = region->start + offset;
+ res->end = region->end + offset;
+}
+EXPORT_SYMBOL(pcibios_bus_to_resource);
/*
* We need to avoid collisions with `mirrored' VGA ports
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void
-pcibios_align_resource(void *data, struct resource *res, unsigned long size,
+void pcibios_align_resource(void *data, struct resource *res, unsigned long size,
unsigned long align)
{
struct pci_dev *dev = data;
}
}
}
-
+EXPORT_SYMBOL(pcibios_align_resource);
/*
* Handle resources of PCI devices. If the world were perfect, we could
static void __init
pcibios_allocate_bus_resources(struct list_head *bus_list)
{
- struct list_head *ln;
struct pci_bus *bus;
int i;
struct resource *res, *pr;
/* Depth-First Search on bus tree */
- for (ln = bus_list->next; ln != bus_list; ln=ln->next) {
- bus = pci_bus_b(ln);
+ list_for_each_entry(bus, bus_list, node) {
for (i = 0; i < 4; ++i) {
if ((res = bus->resource[i]) == NULL || !res->flags
|| res->start > res->end)
return -1;
}
res = bus->resource[i];
+ if (res == NULL)
+ return -1;
pr = NULL;
for (j = 0; j < 4; j++) {
struct resource *r = parent->resource[j];
struct pci_bus *bus;
struct pci_dev *dev;
struct resource *r;
- struct list_head *ln;
int i;
for (r = pr->child; r != NULL; r = r->sibling) {
return 1;
}
}
- for (ln = parent->children.next; ln != &parent->children;
- ln = ln->next) {
- bus = pci_bus_b(ln);
+ list_for_each_entry(bus, &parent->children, node) {
for (i = 0; i < 4; ++i) {
if ((r = bus->resource[i]) == NULL)
continue;
}
}
}
- for (ln = parent->devices.next; ln != &parent->devices; ln=ln->next) {
- dev = pci_dev_b(ln);
+ list_for_each_entry(dev, &parent->devices, bus_list) {
for (i = 0; i < 6; ++i) {
r = &dev->resource[i];
if (!r->flags || (r->flags & IORESOURCE_UNSET))
continue;
- if (pci_find_parent_resource(bus->self, r) != pr)
+ if (pci_find_parent_resource(dev, r) != pr)
continue;
if (r->end >= res->start && res->end >= r->start) {
*conflict = r;
u16 command;
struct resource *r;
- while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev) {
pci_read_config_word(dev, PCI_COMMAND, &command);
for (idx = 0; idx < 6; idx++) {
r = &dev->resource[idx];
if (pass)
continue;
r = &dev->resource[PCI_ROM_RESOURCE];
- if (r->flags & PCI_ROM_ADDRESS_ENABLE) {
+ if (r->flags & IORESOURCE_ROM_ENABLE) {
/* Turn the ROM off, leave the resource region, but keep it unregistered. */
u32 reg;
DBG("PCI: Switching off ROM of %s\n", pci_name(dev));
- r->flags &= ~PCI_ROM_ADDRESS_ENABLE;
+ r->flags &= ~IORESOURCE_ROM_ENABLE;
pci_read_config_dword(dev, dev->rom_base_reg, ®);
pci_write_config_dword(dev, dev->rom_base_reg,
reg & ~PCI_ROM_ADDRESS_ENABLE);
int idx;
struct resource *r;
- while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev) {
int class = dev->class >> 8;
/* Don't touch classless devices and host bridges */
/*
* Functions below are used on OpenFirmware machines.
*/
-static void __openfirmware
+static void
make_one_node_map(struct device_node* node, u8 pci_bus)
{
int *bus_range;
return;
bus_range = (int *) get_property(node, "bus-range", &len);
if (bus_range == NULL || len < 2 * sizeof(int)) {
- printk(KERN_WARNING "Can't get bus-range for %s\n",
- node->full_name);
- return;
- }
- pci_to_OF_bus_map[pci_bus] = bus_range[0];
+ printk(KERN_WARNING "Can't get bus-range for %s, "
+ "assuming it starts at 0\n", node->full_name);
+ pci_to_OF_bus_map[pci_bus] = 0;
+ } else
+ pci_to_OF_bus_map[pci_bus] = bus_range[0];
for (node=node->child; node != 0;node = node->sibling) {
struct pci_dev* dev;
unsigned int *class_code, *reg;
- class_code = (unsigned int *) get_property(node, "class-code", 0);
+ class_code = (unsigned int *) get_property(node, "class-code", NULL);
if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
continue;
- reg = (unsigned int *)get_property(node, "reg", 0);
+ reg = (unsigned int *)get_property(node, "reg", NULL);
if (!reg)
continue;
dev = pci_find_slot(pci_bus, ((reg[0] >> 8) & 0xff));
}
}
-void __openfirmware
+void
pcibios_make_OF_bus_map(void)
{
int i;
continue;
make_one_node_map(node, hose->first_busno);
}
- of_prop_map = get_property(find_path_device("/"), "pci-OF-bus-map", 0);
+ of_prop_map = get_property(find_path_device("/"), "pci-OF-bus-map", NULL);
if (of_prop_map)
memcpy(of_prop_map, pci_to_OF_bus_map, pci_bus_count);
#ifdef DEBUG
typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data);
-static struct device_node* __openfirmware
+static struct device_node*
scan_OF_pci_childs(struct device_node* node, pci_OF_scan_iterator filter, void* data)
{
struct device_node* sub_node;
* a fake root for all functions of a multi-function device,
* we go down them as well.
*/
- class_code = (unsigned int *) get_property(node, "class-code", 0);
+ class_code = (unsigned int *) get_property(node, "class-code", NULL);
if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
strcmp(node->name, "multifunc-device"))
unsigned int *reg;
u8* fdata = (u8*)data;
- reg = (unsigned int *) get_property(node, "reg", 0);
+ reg = (unsigned int *) get_property(node, "reg", NULL);
if (reg && ((reg[0] >> 8) & 0xff) == fdata[1]
&& ((reg[0] >> 16) & 0xff) == fdata[0])
return 1;
return 0;
}
-static struct device_node* __openfirmware
+static struct device_node*
scan_OF_childs_for_device(struct device_node* node, u8 bus, u8 dev_fn)
{
u8 filter_data[2] = {bus, dev_fn};
return NULL;
/* Fixup bus number according to what OF think it is. */
-#ifdef CONFIG_PPC_PMAC
- /* The G5 need a special case here. Basically, we don't remap all
- * busses on it so we don't create the pci-OF-map. However, we do
- * remap the AGP bus and so have to deal with it. A future better
- * fix has to be done by making the remapping per-host and always
- * filling the pci_to_OF map. --BenH
- */
- if (_machine == _MACH_Pmac && busnr >= 0xf0)
- busnr -= 0xf0;
- else
-#endif
if (pci_to_OF_bus_map)
busnr = pci_to_OF_bus_map[busnr];
if (busnr == 0xff)
/* Now, lookup childs of the hose */
return scan_OF_childs_for_device(node->child, busnr, devfn);
}
+EXPORT_SYMBOL(pci_busdev_to_OF_node);
struct device_node*
pci_device_to_OF_node(struct pci_dev *dev)
{
return pci_busdev_to_OF_node(dev->bus, dev->devfn);
}
+EXPORT_SYMBOL(pci_device_to_OF_node);
/* This routine is meant to be used early during boot, when the
* PCI bus numbers have not yet been assigned, and you need to
* issue PCI config cycles to an OF device.
* It could also be used to "fix" RTAS config cycles if you want
- * to set pci_assign_all_busses to 1 and still use RTAS for PCI
+ * to set pci_assign_all_buses to 1 and still use RTAS for PCI
* config cycles.
*/
-struct pci_controller*
-pci_find_hose_for_OF_device(struct device_node* node)
+struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
{
if (!have_of)
return NULL;
return NULL;
}
-static int __openfirmware
+static int
find_OF_pci_device_filter(struct device_node* node, void* data)
{
return ((void *)node == data);
if (!scan_OF_pci_childs(((struct device_node*)hose->arch_data)->child,
find_OF_pci_device_filter, (void *)node))
return -ENODEV;
- reg = (unsigned int *) get_property(node, "reg", 0);
+ reg = (unsigned int *) get_property(node, "reg", NULL);
if (!reg)
return -ENODEV;
*bus = (reg[0] >> 16) & 0xff;
*/
if (!pci_to_OF_bus_map)
return 0;
- while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- if (pci_to_OF_bus_map[dev->bus->number] != *bus)
- continue;
- if (dev->devfn != *devfn)
- continue;
- *bus = dev->bus->number;
- return 0;
- }
+
+ for_each_pci_dev(dev)
+ if (pci_to_OF_bus_map[dev->bus->number] == *bus &&
+ dev->devfn == *devfn) {
+ *bus = dev->bus->number;
+ pci_dev_put(dev);
+ return 0;
+ }
+
return -ENODEV;
}
+EXPORT_SYMBOL(pci_device_from_OF_node);
void __init
pci_process_bridge_OF_ranges(struct pci_controller *hose,
while (ranges && (rlen -= np * sizeof(unsigned int)) >= 0) {
res = NULL;
size = ranges[na+4];
- switch (ranges[0] >> 24) {
+ switch ((ranges[0] >> 24) & 0x3) {
case 1: /* I/O space */
if (ranges[2] != 0)
break;
res = &hose->io_resource;
res->flags = IORESOURCE_IO;
res->start = ranges[2];
+ DBG("PCI: IO 0x%lx -> 0x%lx\n",
+ res->start, res->start + size - 1);
break;
case 2: /* memory space */
memno = 0;
if (memno < 3) {
res = &hose->mem_resources[memno];
res->flags = IORESOURCE_MEM;
+ if(ranges[0] & 0x40000000)
+ res->flags |= IORESOURCE_PREFETCH;
res->start = ranges[na+2];
+ DBG("PCI: MEM[%d] 0x%lx -> 0x%lx\n", memno,
+ res->start, res->start + size - 1);
}
break;
}
}
}
-static ssize_t pci_show_devspec(struct device *dev, char *buf)
+static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pci_dev *pdev;
struct device_node *np;
}
static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
+#else /* CONFIG_PPC_OF */
+void pcibios_make_OF_bus_map(void)
+{
+}
#endif /* CONFIG_PPC_OF */
/* Add sysfs properties */
}
-#ifdef CONFIG_PPC_PMAC
-/*
- * This set of routines checks for PCI<->PCI bridges that have closed
- * IO resources and have child devices. It tries to re-open an IO
- * window on them.
- *
- * This is a _temporary_ fix to workaround a problem with Apple's OF
- * closing IO windows on P2P bridges when the OF drivers of cards
- * below this bridge don't claim any IO range (typically ATI or
- * Adaptec).
- *
- * A more complete fix would be to use drivers/pci/setup-bus.c, which
- * involves a working pcibios_fixup_pbus_ranges(), some more care about
- * ordering when creating the host bus resources, and maybe a few more
- * minor tweaks
- */
-
-/* Initialize bridges with base/limit values we have collected */
-static void __init
-do_update_p2p_io_resource(struct pci_bus *bus, int enable_vga)
-{
- struct pci_dev *bridge = bus->self;
- struct pci_controller* hose = (struct pci_controller *)bridge->sysdata;
- u32 l;
- u16 w;
- struct resource res;
-
- res = *(bus->resource[0]);
-
- DBG("Remapping Bus %d, bridge: %s\n", bus->number, bridge->slot_name);
- res.start -= ((unsigned long) hose->io_base_virt - isa_io_base);
- res.end -= ((unsigned long) hose->io_base_virt - isa_io_base);
- DBG(" IO window: %08lx-%08lx\n", res.start, res.end);
-
- /* Set up the top and bottom of the PCI I/O segment for this bus. */
- pci_read_config_dword(bridge, PCI_IO_BASE, &l);
- l &= 0xffff000f;
- l |= (res.start >> 8) & 0x00f0;
- l |= res.end & 0xf000;
- pci_write_config_dword(bridge, PCI_IO_BASE, l);
-
- if ((l & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
- l = (res.start >> 16) | (res.end & 0xffff0000);
- pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, l);
- }
-
- pci_read_config_word(bridge, PCI_COMMAND, &w);
- w |= PCI_COMMAND_IO;
- pci_write_config_word(bridge, PCI_COMMAND, w);
-
-#if 0 /* Enabling this causes XFree 4.2.0 to hang during PCI probe */
- if (enable_vga) {
- pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, &w);
- w |= PCI_BRIDGE_CTL_VGA;
- pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, w);
- }
-#endif
-}
-
-/* This function is pretty basic and actually quite broken for the
- * general case, it's enough for us right now though. It's supposed
- * to tell us if we need to open an IO range at all or not and what
- * size.
- */
-static int __init
-check_for_io_childs(struct pci_bus *bus, struct resource* res, int *found_vga)
-{
- struct list_head *ln;
- int i;
- int rc = 0;
-
-#define push_end(res, size) do { unsigned long __sz = (size) ; \
- res->end = ((res->end + __sz) / (__sz + 1)) * (__sz + 1) + __sz; \
- } while (0)
-
- for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {
- struct pci_dev *dev = pci_dev_b(ln);
- u16 class = dev->class >> 8;
-
- if (class == PCI_CLASS_DISPLAY_VGA ||
- class == PCI_CLASS_NOT_DEFINED_VGA)
- *found_vga = 1;
- if (class >> 8 == PCI_BASE_CLASS_BRIDGE && dev->subordinate)
- rc |= check_for_io_childs(dev->subordinate, res, found_vga);
- if (class == PCI_CLASS_BRIDGE_CARDBUS)
- push_end(res, 0xfff);
-
- for (i=0; i<PCI_NUM_RESOURCES; i++) {
- struct resource *r;
- unsigned long r_size;
-
- if (dev->class >> 8 == PCI_CLASS_BRIDGE_PCI
- && i >= PCI_BRIDGE_RESOURCES)
- continue;
- r = &dev->resource[i];
- r_size = r->end - r->start;
- if (r_size < 0xfff)
- r_size = 0xfff;
- if (r->flags & IORESOURCE_IO && (r_size) != 0) {
- rc = 1;
- push_end(res, r_size);
- }
- }
- }
-
- return rc;
-}
-
-/* Here we scan all P2P bridges of a given level that have a closed
- * IO window. Note that the test for the presence of a VGA card should
- * be improved to take into account already configured P2P bridges,
- * currently, we don't see them and might end up configuring 2 bridges
- * with VGA pass through enabled
- */
-static void __init
-do_fixup_p2p_level(struct pci_bus *bus)
-{
- struct list_head *ln;
- int i, parent_io;
- int has_vga = 0;
-
- for (parent_io=0; parent_io<4; parent_io++)
- if (bus->resource[parent_io]->flags & IORESOURCE_IO)
- break;
- if (parent_io >= 4)
- return;
-
- for (ln=bus->children.next; ln != &bus->children; ln=ln->next) {
- struct pci_bus *b = pci_bus_b(ln);
- struct pci_dev *d = b->self;
- struct pci_controller* hose = (struct pci_controller *)d->sysdata;
- struct resource *res = b->resource[0];
- struct resource tmp_res;
- unsigned long max;
- int found_vga = 0;
-
- memset(&tmp_res, 0, sizeof(tmp_res));
- tmp_res.start = bus->resource[parent_io]->start;
-
- /* We don't let low addresses go through that closed P2P bridge, well,
- * that may not be necessary but I feel safer that way
- */
- if (tmp_res.start == 0)
- tmp_res.start = 0x1000;
-
- if (!list_empty(&b->devices) && res && res->flags == 0 &&
- res != bus->resource[parent_io] &&
- (d->class >> 8) == PCI_CLASS_BRIDGE_PCI &&
- check_for_io_childs(b, &tmp_res, &found_vga)) {
- u8 io_base_lo;
-
- printk(KERN_INFO "Fixing up IO bus %s\n", b->name);
-
- if (found_vga) {
- if (has_vga) {
- printk(KERN_WARNING "Skipping VGA, already active"
- " on bus segment\n");
- found_vga = 0;
- } else
- has_vga = 1;
- }
- pci_read_config_byte(d, PCI_IO_BASE, &io_base_lo);
-
- if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32)
- max = ((unsigned long) hose->io_base_virt
- - isa_io_base) + 0xffffffff;
- else
- max = ((unsigned long) hose->io_base_virt
- - isa_io_base) + 0xffff;
-
- *res = tmp_res;
- res->flags = IORESOURCE_IO;
- res->name = b->name;
-
- /* Find a resource in the parent where we can allocate */
- for (i = 0 ; i < 4; i++) {
- struct resource *r = bus->resource[i];
- if (!r)
- continue;
- if ((r->flags & IORESOURCE_IO) == 0)
- continue;
- DBG("Trying to allocate from %08lx, size %08lx from parent"
- " res %d: %08lx -> %08lx\n",
- res->start, res->end, i, r->start, r->end);
-
- if (allocate_resource(r, res, res->end + 1, res->start, max,
- res->end + 1, NULL, NULL) < 0) {
- DBG("Failed !\n");
- continue;
- }
- do_update_p2p_io_resource(b, found_vga);
- break;
- }
- }
- do_fixup_p2p_level(b);
- }
-}
-
-static void
-pcibios_fixup_p2p_bridges(void)
-{
- struct list_head *ln;
-
- for(ln=pci_root_buses.next; ln != &pci_root_buses; ln=ln->next) {
- struct pci_bus *b = pci_bus_b(ln);
- do_fixup_p2p_level(b);
- }
-}
-
-#endif /* CONFIG_PPC_PMAC */
-
static int __init
pcibios_init(void)
{
/* Scan all of the recorded PCI controllers. */
for (next_busno = 0, hose = hose_head; hose; hose = hose->next) {
- if (pci_assign_all_busses)
+ if (pci_assign_all_buses)
hose->first_busno = next_busno;
hose->last_busno = 0xff;
bus = pci_scan_bus(hose->first_busno, hose->ops, hose);
hose->last_busno = bus->subordinate;
- if (pci_assign_all_busses || next_busno <= hose->last_busno)
- next_busno = hose->last_busno+1;
+ if (pci_assign_all_buses || next_busno <= hose->last_busno)
+ next_busno = hose->last_busno + pcibios_assign_bus_offset;
}
pci_bus_count = next_busno;
* numbers vs. kernel bus numbers since we may have to
* remap them.
*/
- if (pci_assign_all_busses && have_of)
+ if (pci_assign_all_buses && have_of)
pcibios_make_OF_bus_map();
/* Do machine dependent PCI interrupt routing */
pcibios_allocate_bus_resources(&pci_root_buses);
pcibios_allocate_resources(0);
pcibios_allocate_resources(1);
-#ifdef CONFIG_PPC_PMAC
- pcibios_fixup_p2p_bridges();
-#endif /* CONFIG_PPC_PMAC */
pcibios_assign_resources();
/* Call machine dependent post-init code */
return NULL;
}
-void*
+void __iomem *
pci_bus_io_base(unsigned int bus)
{
struct pci_controller *hose;
return res->start;
}
-/*
- * Platform support for /proc/bus/pci/X/Y mmap()s,
- * modelled on the sparc64 implementation by Dave Miller.
- * -- paulus.
- */
-/*
- * Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static __inline__ int
-__pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
+static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
+ unsigned long *offset,
+ enum pci_mmap_state mmap_state)
{
- struct pci_controller *hose = (struct pci_controller *) dev->sysdata;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long base;
- struct resource *res;
- int i;
- int ret = -EINVAL;
+ struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
+ unsigned long io_offset = 0;
+ int i, res_bit;
if (hose == 0)
- return -EINVAL; /* should never happen */
- if (offset + size <= offset)
- return -EINVAL;
+ return NULL; /* should never happen */
+ /* If memory, add on the PCI bridge address offset */
if (mmap_state == pci_mmap_mem) {
- /* PCI memory space */
- base = hose->pci_mem_offset;
- for (i = 0; i < 3; ++i) {
- res = &hose->mem_resources[i];
- if (res->flags == 0)
- continue;
- if (offset >= res->start - base
- && offset + size - 1 <= res->end - base) {
- ret = 0;
- break;
- }
- }
- offset += hose->pci_mem_offset;
+ *offset += hose->pci_mem_offset;
+ res_bit = IORESOURCE_MEM;
} else {
- /* PCI I/O space */
- base = (unsigned long)hose->io_base_virt - isa_io_base;
- res = &hose->io_resource;
- if (offset >= res->start - base
- && offset + size - 1 <= res->end - base)
- ret = 0;
- offset += hose->io_base_phys;
+ io_offset = hose->io_base_virt - ___IO_BASE;
+ *offset += io_offset;
+ res_bit = IORESOURCE_IO;
}
- vma->vm_pgoff = offset >> PAGE_SHIFT;
- return ret;
-}
+ /*
+ * Check that the offset requested corresponds to one of the
+ * resources of the device.
+ */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *rp = &dev->resource[i];
+ int flags = rp->flags;
-/*
- * Set vm_flags of VMA, as appropriate for this architecture, for a pci device
- * mapping.
- */
-static __inline__ void
-__pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
-{
- vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
+ /* treat ROM as memory (should be already) */
+ if (i == PCI_ROM_RESOURCE)
+ flags |= IORESOURCE_MEM;
+
+ /* Active and same type? */
+ if ((flags & res_bit) == 0)
+ continue;
+
+ /* In the range of this resource? */
+ if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
+ continue;
+
+ /* found it! construct the final physical address */
+ if (mmap_state == pci_mmap_io)
+ *offset += hose->io_base_phys - io_offset;
+ return rp;
+ }
+
+ return NULL;
}
/*
* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
* device mapping.
*/
-static __inline__ void
-__pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine)
+static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
+ pgprot_t protection,
+ enum pci_mmap_state mmap_state,
+ int write_combine)
{
- int prot = pgprot_val(vma->vm_page_prot);
+ unsigned long prot = pgprot_val(protection);
+
+ /* Write combine is always 0 on non-memory space mappings. On
+ * memory space, if the user didn't pass 1, we check for a
+ * "prefetchable" resource. This is a bit hackish, but we use
+ * this to workaround the inability of /sysfs to provide a write
+ * combine bit
+ */
+ if (mmap_state != pci_mmap_mem)
+ write_combine = 0;
+ else if (write_combine == 0) {
+ if (rp->flags & IORESOURCE_PREFETCH)
+ write_combine = 1;
+ }
/* XXX would be nice to have a way to ask for write-through */
prot |= _PAGE_NO_CACHE;
- if (!write_combine)
+ if (write_combine)
+ prot &= ~_PAGE_GUARDED;
+ else
prot |= _PAGE_GUARDED;
- vma->vm_page_prot = __pgprot(prot);
+
+ printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
+ prot);
+
+ return __pgprot(prot);
+}
+
+/*
+ * This one is used by /dev/mem and fbdev who have no clue about the
+ * PCI device, it tries to find the PCI device first and calls the
+ * above routine
+ */
+pgprot_t pci_phys_mem_access_prot(struct file *file,
+ unsigned long pfn,
+ unsigned long size,
+ pgprot_t protection)
+{
+ struct pci_dev *pdev = NULL;
+ struct resource *found = NULL;
+ unsigned long prot = pgprot_val(protection);
+ unsigned long offset = pfn << PAGE_SHIFT;
+ int i;
+
+ if (page_is_ram(pfn))
+ return prot;
+
+ prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
+
+ for_each_pci_dev(pdev) {
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *rp = &pdev->resource[i];
+ int flags = rp->flags;
+
+ /* Active and same type? */
+ if ((flags & IORESOURCE_MEM) == 0)
+ continue;
+ /* In the range of this resource? */
+ if (offset < (rp->start & PAGE_MASK) ||
+ offset > rp->end)
+ continue;
+ found = rp;
+ break;
+ }
+ if (found)
+ break;
+ }
+ if (found) {
+ if (found->flags & IORESOURCE_PREFETCH)
+ prot &= ~_PAGE_GUARDED;
+ pci_dev_put(pdev);
+ }
+
+ DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
+
+ return __pgprot(prot);
}
+
/*
* Perform the actual remap of the pages for a PCI device mapping, as
* appropriate for this architecture. The region in the process to map
enum pci_mmap_state mmap_state,
int write_combine)
{
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ struct resource *rp;
int ret;
- ret = __pci_mmap_make_offset(dev, vma, mmap_state);
- if (ret < 0)
- return ret;
+ rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
+ if (rp == NULL)
+ return -EINVAL;
- __pci_mmap_set_flags(dev, vma, mmap_state);
- __pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine);
+ vma->vm_pgoff = offset >> PAGE_SHIFT;
+ vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
+ vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
+ vma->vm_page_prot,
+ mmap_state, write_combine);
- ret = remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+ ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
return ret;
struct pci_controller* hose;
long result = -EOPNOTSUPP;
- /* Argh ! Please forgive me for that hack, but that's the
- * simplest way to get existing XFree to not lockup on some
- * G5 machines... So when something asks for bus 0 io base
- * (bus 0 is HT root), we return the AGP one instead.
- */
-#ifdef CONFIG_PPC_PMAC
- if (_machine == _MACH_Pmac && machine_is_compatible("MacRISC4"))
- if (bus == 0)
- bus = 0xf0;
-#endif /* CONFIG_PPC_PMAC */
-
hose = pci_bus_to_hose(bus);
if (!hose)
return -ENODEV;
return result;
}
+void pci_resource_to_user(const struct pci_dev *dev, int bar,
+ const struct resource *rsrc,
+ u64 *start, u64 *end)
+{
+ struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
+ unsigned long offset = 0;
+
+ if (hose == NULL)
+ return;
+
+ if (rsrc->flags & IORESOURCE_IO)
+ offset = ___IO_BASE - hose->io_base_virt + hose->io_base_phys;
+
+ *start = rsrc->start + offset;
+ *end = rsrc->end + offset;
+}
+
void __init
pci_init_resource(struct resource *res, unsigned long start, unsigned long end,
int flags, char *name)
res->child = NULL;
}
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
+{
+ unsigned long start = pci_resource_start(dev, bar);
+ unsigned long len = pci_resource_len(dev, bar);
+ unsigned long flags = pci_resource_flags(dev, bar);
+
+ if (!len)
+ return NULL;
+ if (max && len > max)
+ len = max;
+ if (flags & IORESOURCE_IO)
+ return ioport_map(start, len);
+ if (flags & IORESOURCE_MEM)
+ /* Not checking IORESOURCE_CACHEABLE because PPC does
+ * not currently distinguish between ioremap and
+ * ioremap_nocache.
+ */
+ return ioremap(start, len);
+ /* What? */
+ return NULL;
+}
+
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{
+ /* Nothing to do */
+}
+EXPORT_SYMBOL(pci_iomap);
+EXPORT_SYMBOL(pci_iounmap);
+
+unsigned long pci_address_to_pio(phys_addr_t address)
+{
+ struct pci_controller* hose = hose_head;
+
+ for (; hose; hose = hose->next) {
+ unsigned int size = hose->io_resource.end -
+ hose->io_resource.start + 1;
+ if (address >= hose->io_base_phys &&
+ address < (hose->io_base_phys + size)) {
+ unsigned long base =
+ (unsigned long)hose->io_base_virt - _IO_BASE;
+ return base + (address - hose->io_base_phys);
+ }
+ }
+ return (unsigned int)-1;
+}
+EXPORT_SYMBOL(pci_address_to_pio);
+
/*
* Null PCI config access functions, for the case when we can't
* find a hose.