diff options
Diffstat (limited to 'arch/powerpc/kernel/pci_32.c')
| -rw-r--r-- | arch/powerpc/kernel/pci_32.c | 969 |
1 files changed, 33 insertions, 936 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c index 0e2bee46304c..88db4ffaf11c 100644 --- a/arch/powerpc/kernel/pci_32.c +++ b/arch/powerpc/kernel/pci_32.c @@ -13,6 +13,7 @@ #include <linux/bootmem.h> #include <linux/irq.h> #include <linux/list.h> +#include <linux/of.h> #include <asm/processor.h> #include <asm/io.h> @@ -32,19 +33,12 @@ #endif 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 int pci_relocate_bridge_resource(struct pci_bus *bus, int i); -static int probe_resource(struct pci_bus *parent, struct resource *pr, - struct resource *res, struct resource **conflict); -static void update_bridge_base(struct pci_bus *bus, int i); -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_cpc710_pci64(struct pci_dev* dev); #ifdef CONFIG_PPC_OF static u8* pci_to_OF_bus_map; @@ -53,7 +47,7 @@ static u8* pci_to_OF_bus_map; /* By default, we don't re-assign bus numbers. We do this only on * some pmacs */ -int pci_assign_all_buses; +static int pci_assign_all_buses; LIST_HEAD(hose_list); @@ -100,505 +94,6 @@ fixup_cpc710_pci64(struct pci_dev* dev) } 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 pci_controller* hose = (struct pci_controller *)dev->sysdata; - int i; - unsigned long offset; - - if (!hose) { - printk(KERN_ERR "No hose for PCI dev %s!\n", pci_name(dev)); - return; - } - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - struct resource *res = dev->resource + i; - if (!res->flags) - continue; - if (res->end == 0xffffffff) { - DBG("PCI:%s Resource %d [%016llx-%016llx] is unassigned\n", - pci_name(dev), i, (u64)res->start, (u64)res->end); - res->end -= res->start; - res->start = 0; - res->flags |= IORESOURCE_UNSET; - continue; - } - offset = 0; - if (res->flags & IORESOURCE_MEM) { - offset = hose->pci_mem_offset; - } else if (res->flags & IORESOURCE_IO) { - offset = (unsigned long) hose->io_base_virt - - isa_io_base; - } - if (offset != 0) { - res->start += offset; - res->end += offset; - DBG("Fixup res %d (%lx) of dev %s: %llx -> %llx\n", - i, res->flags, pci_name(dev), - (u64)res->start - offset, (u64)res->start); - } - } - - /* Call machine specific resource fixup */ - 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, - struct resource *res) -{ - 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; - 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 - * and other strange ISA hardware, so we always want the - * addresses to be allocated in the 0x000-0x0ff region - * modulo 0x400. - * - * Why? Because some silly external IO cards only decode - * the low 10 bits of the IO address. The 0x00-0xff region - * is reserved for motherboard devices that decode all 16 - * bits, so it's ok to allocate at, say, 0x2800-0x28ff, - * 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, - resource_size_t size, resource_size_t align) -{ - struct pci_dev *dev = data; - - if (res->flags & IORESOURCE_IO) { - resource_size_t start = res->start; - - if (size > 0x100) { - printk(KERN_ERR "PCI: I/O Region %s/%d too large" - " (%lld bytes)\n", pci_name(dev), - dev->resource - res, (unsigned long long)size); - } - - if (start & 0x300) { - start = (start + 0x3ff) & ~0x3ff; - res->start = start; - } - } -} -EXPORT_SYMBOL(pcibios_align_resource); - -/* - * Handle resources of PCI devices. If the world were perfect, we could - * just allocate all the resource regions and do nothing more. It isn't. - * On the other hand, we cannot just re-allocate all devices, as it would - * require us to know lots of host bridge internals. So we attempt to - * keep as much of the original configuration as possible, but tweak it - * when it's found to be wrong. - * - * Known BIOS problems we have to work around: - * - I/O or memory regions not configured - * - regions configured, but not enabled in the command register - * - bogus I/O addresses above 64K used - * - expansion ROMs left enabled (this may sound harmless, but given - * the fact the PCI specs explicitly allow address decoders to be - * shared between expansion ROMs and other resource regions, it's - * at least dangerous) - * - * Our solution: - * (1) Allocate resources for all buses behind PCI-to-PCI bridges. - * This gives us fixed barriers on where we can allocate. - * (2) Allocate resources for all enabled devices. If there is - * a collision, just mark the resource as unallocated. Also - * disable expansion ROMs during this step. - * (3) Try to allocate resources for disabled devices. If the - * resources were assigned correctly, everything goes well, - * if they weren't, they won't disturb allocation of other - * resources. - * (4) Assign new addresses to resources which were either - * not configured at all or misconfigured. If explicitly - * requested by the user, configure expansion ROM address - * as well. - */ - -static void __init -pcibios_allocate_bus_resources(struct list_head *bus_list) -{ - struct pci_bus *bus; - int i; - struct resource *res, *pr; - - /* Depth-First Search on bus tree */ - 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) - continue; - if (bus->parent == NULL) - pr = (res->flags & IORESOURCE_IO)? - &ioport_resource: &iomem_resource; - else { - pr = pci_find_parent_resource(bus->self, res); - if (pr == res) { - /* this happens when the generic PCI - * code (wrongly) decides that this - * bridge is transparent -- paulus - */ - continue; - } - } - - DBG("PCI: bridge rsrc %llx..%llx (%lx), parent %p\n", - (u64)res->start, (u64)res->end, res->flags, pr); - if (pr) { - if (request_resource(pr, res) == 0) - continue; - /* - * Must be a conflict with an existing entry. - * Move that entry (or entries) under the - * bridge resource and try again. - */ - if (reparent_resources(pr, res) == 0) - continue; - } - printk(KERN_ERR "PCI: Cannot allocate resource region " - "%d of PCI bridge %d\n", i, bus->number); - if (pci_relocate_bridge_resource(bus, i)) - bus->resource[i] = NULL; - } - pcibios_allocate_bus_resources(&bus->children); - } -} - -/* - * Reparent resource children of pr that conflict with res - * under res, and make res replace those children. - */ -static int __init -reparent_resources(struct resource *parent, struct resource *res) -{ - struct resource *p, **pp; - struct resource **firstpp = NULL; - - for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) { - if (p->end < res->start) - continue; - if (res->end < p->start) - break; - if (p->start < res->start || p->end > res->end) - return -1; /* not completely contained */ - if (firstpp == NULL) - firstpp = pp; - } - if (firstpp == NULL) - return -1; /* didn't find any conflicting entries? */ - res->parent = parent; - res->child = *firstpp; - res->sibling = *pp; - *firstpp = res; - *pp = NULL; - for (p = res->child; p != NULL; p = p->sibling) { - p->parent = res; - DBG(KERN_INFO "PCI: reparented %s [%llx..%llx] under %s\n", - p->name, (u64)p->start, (u64)p->end, res->name); - } - return 0; -} - -/* - * A bridge has been allocated a range which is outside the range - * of its parent bridge, so it needs to be moved. - */ -static int __init -pci_relocate_bridge_resource(struct pci_bus *bus, int i) -{ - struct resource *res, *pr, *conflict; - unsigned long try, size; - int j; - struct pci_bus *parent = bus->parent; - - if (parent == NULL) { - /* shouldn't ever happen */ - printk(KERN_ERR "PCI: can't move host bridge resource\n"); - 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]; - if (!r) - continue; - if ((res->flags ^ r->flags) & (IORESOURCE_IO | IORESOURCE_MEM)) - continue; - if (!((res->flags ^ r->flags) & IORESOURCE_PREFETCH)) { - pr = r; - break; - } - if (res->flags & IORESOURCE_PREFETCH) - pr = r; - } - if (pr == NULL) - return -1; - size = res->end - res->start; - if (pr->start > pr->end || size > pr->end - pr->start) - return -1; - try = pr->end; - for (;;) { - res->start = try - size; - res->end = try; - if (probe_resource(bus->parent, pr, res, &conflict) == 0) - break; - if (conflict->start <= pr->start + size) - return -1; - try = conflict->start - 1; - } - if (request_resource(pr, res)) { - DBG(KERN_ERR "PCI: huh? couldn't move to %llx..%llx\n", - (u64)res->start, (u64)res->end); - return -1; /* "can't happen" */ - } - update_bridge_base(bus, i); - printk(KERN_INFO "PCI: bridge %d resource %d moved to %llx..%llx\n", - bus->number, i, (unsigned long long)res->start, - (unsigned long long)res->end); - return 0; -} - -static int __init -probe_resource(struct pci_bus *parent, struct resource *pr, - struct resource *res, struct resource **conflict) -{ - struct pci_bus *bus; - struct pci_dev *dev; - struct resource *r; - int i; - - for (r = pr->child; r != NULL; r = r->sibling) { - if (r->end >= res->start && res->end >= r->start) { - *conflict = r; - return 1; - } - } - list_for_each_entry(bus, &parent->children, node) { - for (i = 0; i < 4; ++i) { - if ((r = bus->resource[i]) == NULL) - continue; - if (!r->flags || r->start > r->end || r == res) - continue; - if (pci_find_parent_resource(bus->self, r) != pr) - continue; - if (r->end >= res->start && res->end >= r->start) { - *conflict = r; - return 1; - } - } - } - 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(dev, r) != pr) - continue; - if (r->end >= res->start && res->end >= r->start) { - *conflict = r; - return 1; - } - } - } - return 0; -} - -void __init -update_bridge_resource(struct pci_dev *dev, struct resource *res) -{ - u8 io_base_lo, io_limit_lo; - u16 mem_base, mem_limit; - u16 cmd; - unsigned long start, end, off; - struct pci_controller *hose = dev->sysdata; - - if (!hose) { - printk("update_bridge_base: no hose?\n"); - return; - } - pci_read_config_word(dev, PCI_COMMAND, &cmd); - pci_write_config_word(dev, PCI_COMMAND, - cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY)); - if (res->flags & IORESOURCE_IO) { - off = (unsigned long) hose->io_base_virt - isa_io_base; - start = res->start - off; - end = res->end - off; - io_base_lo = (start >> 8) & PCI_IO_RANGE_MASK; - io_limit_lo = (end >> 8) & PCI_IO_RANGE_MASK; - if (end > 0xffff) - io_base_lo |= PCI_IO_RANGE_TYPE_32; - else - io_base_lo |= PCI_IO_RANGE_TYPE_16; - pci_write_config_word(dev, PCI_IO_BASE_UPPER16, - start >> 16); - pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16, - end >> 16); - pci_write_config_byte(dev, PCI_IO_BASE, io_base_lo); - pci_write_config_byte(dev, PCI_IO_LIMIT, io_limit_lo); - - } else if ((res->flags & (IORESOURCE_MEM | IORESOURCE_PREFETCH)) - == IORESOURCE_MEM) { - off = hose->pci_mem_offset; - mem_base = ((res->start - off) >> 16) & PCI_MEMORY_RANGE_MASK; - mem_limit = ((res->end - off) >> 16) & PCI_MEMORY_RANGE_MASK; - pci_write_config_word(dev, PCI_MEMORY_BASE, mem_base); - pci_write_config_word(dev, PCI_MEMORY_LIMIT, mem_limit); - - } else if ((res->flags & (IORESOURCE_MEM | IORESOURCE_PREFETCH)) - == (IORESOURCE_MEM | IORESOURCE_PREFETCH)) { - off = hose->pci_mem_offset; - mem_base = ((res->start - off) >> 16) & PCI_PREF_RANGE_MASK; - mem_limit = ((res->end - off) >> 16) & PCI_PREF_RANGE_MASK; - pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, mem_base); - pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, mem_limit); - - } else { - DBG(KERN_ERR "PCI: ugh, bridge %s res has flags=%lx\n", - pci_name(dev), res->flags); - } - pci_write_config_word(dev, PCI_COMMAND, cmd); -} - -static void __init -update_bridge_base(struct pci_bus *bus, int i) -{ - struct resource *res = bus->resource[i]; - struct pci_dev *dev = bus->self; - update_bridge_resource(dev, res); -} - -static inline void alloc_resource(struct pci_dev *dev, int idx) -{ - struct resource *pr, *r = &dev->resource[idx]; - - DBG("PCI:%s: Resource %d: %016llx-%016llx (f=%lx)\n", - pci_name(dev), idx, (u64)r->start, (u64)r->end, r->flags); - pr = pci_find_parent_resource(dev, r); - if (!pr || request_resource(pr, r) < 0) { - printk(KERN_ERR "PCI: Cannot allocate resource region %d" - " of device %s\n", idx, pci_name(dev)); - if (pr) - DBG("PCI: parent is %p: %016llx-%016llx (f=%lx)\n", - pr, (u64)pr->start, (u64)pr->end, pr->flags); - /* We'll assign a new address later */ - r->flags |= IORESOURCE_UNSET; - r->end -= r->start; - r->start = 0; - } -} - -static void __init -pcibios_allocate_resources(int pass) -{ - struct pci_dev *dev = NULL; - int idx, disabled; - u16 command; - struct resource *r; - - for_each_pci_dev(dev) { - pci_read_config_word(dev, PCI_COMMAND, &command); - for (idx = 0; idx < 6; idx++) { - r = &dev->resource[idx]; - if (r->parent) /* Already allocated */ - continue; - if (!r->flags || (r->flags & IORESOURCE_UNSET)) - continue; /* Not assigned at all */ - if (r->flags & IORESOURCE_IO) - disabled = !(command & PCI_COMMAND_IO); - else - disabled = !(command & PCI_COMMAND_MEMORY); - if (pass == disabled) - alloc_resource(dev, idx); - } - if (pass) - continue; - r = &dev->resource[PCI_ROM_RESOURCE]; - 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 &= ~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); - } - } -} - -static void __init -pcibios_assign_resources(void) -{ - struct pci_dev *dev = NULL; - int idx; - struct resource *r; - - for_each_pci_dev(dev) { - int class = dev->class >> 8; - - /* Don't touch classless devices and host bridges */ - if (!class || class == PCI_CLASS_BRIDGE_HOST) - continue; - - for (idx = 0; idx < 6; idx++) { - r = &dev->resource[idx]; - - /* - * We shall assign a new address to this resource, - * either because the BIOS (sic) forgot to do so - * or because we have decided the old address was - * unusable for some reason. - */ - if ((r->flags & IORESOURCE_UNSET) && r->end && - (!ppc_md.pcibios_enable_device_hook || - !ppc_md.pcibios_enable_device_hook(dev, 1))) { - int rc; - - r->flags &= ~IORESOURCE_UNSET; - rc = pci_assign_resource(dev, idx); - BUG_ON(rc); - } - } - -#if 0 /* don't assign ROMs */ - r = &dev->resource[PCI_ROM_RESOURCE]; - r->end -= r->start; - r->start = 0; - if (r->end) - pci_assign_resource(dev, PCI_ROM_RESOURCE); -#endif - } -} - #ifdef CONFIG_PPC_OF /* * Functions below are used on OpenFirmware machines. @@ -619,7 +114,7 @@ make_one_node_map(struct device_node* node, u8 pci_bus) } else pci_to_OF_bus_map[pci_bus] = bus_range[0]; - for (node=node->child; node != 0;node = node->sibling) { + for_each_child_of_node(node, node) { struct pci_dev* dev; const unsigned int *class_code, *reg; @@ -662,8 +157,8 @@ pcibios_make_OF_bus_map(void) /* For each hose, we begin searching bridges */ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { - struct device_node* node; - node = (struct device_node *)hose->arch_data; + struct device_node* node = hose->dn; + if (!node) continue; make_one_node_map(node, hose->first_busno); @@ -688,15 +183,18 @@ pcibios_make_OF_bus_map(void) typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data); static struct device_node* -scan_OF_pci_childs(struct device_node* node, pci_OF_scan_iterator filter, void* data) +scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data) { + struct device_node *node; struct device_node* sub_node; - for (; node != 0;node = node->sibling) { + for_each_child_of_node(parent, node) { const unsigned int *class_code; - if (filter(node, data)) + if (filter(node, data)) { + of_node_put(node); return node; + } /* For PCI<->PCI bridges or CardBus bridges, we go down * Note: some OFs create a parent node "multifunc-device" as @@ -708,9 +206,11 @@ scan_OF_pci_childs(struct device_node* node, pci_OF_scan_iterator filter, void* (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) && strcmp(node->name, "multifunc-device")) continue; - sub_node = scan_OF_pci_childs(node->child, filter, data); - if (sub_node) + sub_node = scan_OF_pci_childs(node, filter, data); + if (sub_node) { + of_node_put(node); return sub_node; + } } return NULL; } @@ -718,11 +218,11 @@ scan_OF_pci_childs(struct device_node* node, pci_OF_scan_iterator filter, void* static struct device_node *scan_OF_for_pci_dev(struct device_node *parent, unsigned int devfn) { - struct device_node *np = NULL; + struct device_node *np; const u32 *reg; unsigned int psize; - while ((np = of_get_next_child(parent, np)) != NULL) { + for_each_child_of_node(parent, np) { reg = of_get_property(np, "reg", &psize); if (reg == NULL || psize < 4) continue; @@ -742,7 +242,7 @@ static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus) struct pci_controller *hose = pci_bus_to_host(bus); if (hose == NULL) return NULL; - return of_node_get(hose->arch_data); + return of_node_get(hose->dn); } /* not a root bus, we need to get our parent */ @@ -812,9 +312,9 @@ pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn) return -ENODEV; /* Make sure it's really a PCI device */ hose = pci_find_hose_for_OF_device(node); - if (!hose || !hose->arch_data) + if (!hose || !hose->dn) return -ENODEV; - if (!scan_OF_pci_childs(((struct device_node*)hose->arch_data)->child, + if (!scan_OF_pci_childs(hose->dn, find_OF_pci_device_filter, (void *)node)) return -ENODEV; reg = of_get_property(node, "reg", NULL); @@ -843,120 +343,6 @@ pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn) } EXPORT_SYMBOL(pci_device_from_OF_node); -void __init -pci_process_bridge_OF_ranges(struct pci_controller *hose, - struct device_node *dev, int primary) -{ - static unsigned int static_lc_ranges[256] __initdata; - const unsigned int *dt_ranges; - unsigned int *lc_ranges, *ranges, *prev, size; - int rlen = 0, orig_rlen; - int memno = 0; - struct resource *res; - int np, na = of_n_addr_cells(dev); - np = na + 5; - - /* First we try to merge ranges to fix a problem with some pmacs - * that can have more than 3 ranges, fortunately using contiguous - * addresses -- BenH - */ - dt_ranges = of_get_property(dev, "ranges", &rlen); - if (!dt_ranges) - return; - /* Sanity check, though hopefully that never happens */ - if (rlen > sizeof(static_lc_ranges)) { - printk(KERN_WARNING "OF ranges property too large !\n"); - rlen = sizeof(static_lc_ranges); - } - lc_ranges = static_lc_ranges; - memcpy(lc_ranges, dt_ranges, rlen); - orig_rlen = rlen; - - /* Let's work on a copy of the "ranges" property instead of damaging - * the device-tree image in memory - */ - ranges = lc_ranges; - prev = NULL; - while ((rlen -= np * sizeof(unsigned int)) >= 0) { - if (prev) { - if (prev[0] == ranges[0] && prev[1] == ranges[1] && - (prev[2] + prev[na+4]) == ranges[2] && - (prev[na+2] + prev[na+4]) == ranges[na+2]) { - prev[na+4] += ranges[na+4]; - ranges[0] = 0; - ranges += np; - continue; - } - } - prev = ranges; - ranges += np; - } - - /* - * The ranges property is laid out as an array of elements, - * each of which comprises: - * cells 0 - 2: a PCI address - * cells 3 or 3+4: a CPU physical address - * (size depending on dev->n_addr_cells) - * cells 4+5 or 5+6: the size of the range - */ - ranges = lc_ranges; - rlen = orig_rlen; - while (ranges && (rlen -= np * sizeof(unsigned int)) >= 0) { - res = NULL; - size = ranges[na+4]; - switch ((ranges[0] >> 24) & 0x3) { - case 1: /* I/O space */ - if (ranges[2] != 0) - break; - hose->io_base_phys = ranges[na+2]; - /* limit I/O space to 16MB */ - if (size > 0x01000000) - size = 0x01000000; - hose->io_base_virt = ioremap(ranges[na+2], size); - if (primary) - isa_io_base = (unsigned long) hose->io_base_virt; - res = &hose->io_resource; - res->flags = IORESOURCE_IO; - res->start = ranges[2]; - DBG("PCI: IO 0x%llx -> 0x%llx\n", - (u64)res->start, (u64)res->start + size - 1); - break; - case 2: /* memory space */ - memno = 0; - if (ranges[1] == 0 && ranges[2] == 0 - && ranges[na+4] <= (16 << 20)) { - /* 1st 16MB, i.e. ISA memory area */ - if (primary) - isa_mem_base = ranges[na+2]; - memno = 1; - } - while (memno < 3 && hose->mem_resources[memno].flags) - ++memno; - if (memno == 0) - hose->pci_mem_offset = ranges[na+2] - ranges[2]; - 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%llx -> 0x%llx\n", memno, - (u64)res->start, (u64)res->start + size - 1); - } - break; - } - if (res != NULL) { - res->name = dev->full_name; - res->end = res->start + size - 1; - res->parent = NULL; - res->sibling = NULL; - res->child = NULL; - } - ranges += np; - } -} - /* We create the "pci-OF-bus-map" property now so it appears in the * /proc device tree */ @@ -986,219 +372,7 @@ void pcibios_make_OF_bus_map(void) } #endif /* CONFIG_PPC_OF */ -#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; - - if (bus->resource[0] == NULL) - return; - res = *(bus->resource[0]); - - DBG("Remapping Bus %d, bridge: %s\n", bus->number, pci_name(bridge)); - 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: %016llx-%016llx\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 pci_dev *dev; - int i; - int rc = 0; - -#define push_end(res, mask) do { \ - BUG_ON((mask+1) & mask); \ - res->end = (res->end + mask) | mask; \ -} while (0) - - list_for_each_entry(dev, &bus->devices, bus_list) { - 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 pci_bus *b; - int i, parent_io; - int has_vga = 0; - - for (parent_io=0; parent_io<4; parent_io++) - if (bus->resource[parent_io] - && bus->resource[parent_io]->flags & IORESOURCE_IO) - break; - if (parent_io >= 4) - return; - - list_for_each_entry(b, &bus->children, node) { - 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 %016llx, size %016llx from parent" - " res %d: %016llx -> %016llx\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 pci_bus *b; - - list_for_each_entry(b, &pci_root_buses, node) - do_fixup_p2p_level(b); -} - -#endif /* CONFIG_PPC_PMAC */ - -static int __init -pcibios_init(void) +static int __init pcibios_init(void) { struct pci_controller *hose, *tmp; struct pci_bus *bus; @@ -1206,6 +380,9 @@ pcibios_init(void) printk(KERN_INFO "PCI: Probing PCI hardware\n"); + if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS) + pci_assign_all_buses = 1; + /* Scan all of the recorded PCI controllers. */ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { if (pci_assign_all_buses) @@ -1213,9 +390,10 @@ pcibios_init(void) hose->last_busno = 0xff; bus = pci_scan_bus_parented(hose->parent, hose->first_busno, hose->ops, hose); - if (bus) + if (bus) { pci_bus_add_devices(bus); - hose->last_busno = bus->subordinate; + hose->last_busno = bus->subordinate; + } if (pci_assign_all_buses || next_busno <= hose->last_busno) next_busno = hose->last_busno + pcibios_assign_bus_offset; } @@ -1228,18 +406,8 @@ pcibios_init(void) if (pci_assign_all_buses && have_of) pcibios_make_OF_bus_map(); - /* Call machine dependent fixup */ - if (ppc_md.pcibios_fixup) - ppc_md.pcibios_fixup(); - - /* Allocate and assign resources */ - 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 common code to handle resource allocation */ + pcibios_resource_survey(); /* Call machine dependent post-init code */ if (ppc_md.pcibios_after_init) @@ -1250,14 +418,14 @@ pcibios_init(void) subsys_initcall(pcibios_init); -void pcibios_fixup_bus(struct pci_bus *bus) +void __devinit pcibios_do_bus_setup(struct pci_bus *bus) { struct pci_controller *hose = (struct pci_controller *) bus->sysdata; unsigned long io_offset; struct resource *res; - struct pci_dev *dev; int i; + /* Hookup PHB resources */ io_offset = (unsigned long)hose->io_base_virt - isa_io_base; if (bus->parent == NULL) { /* This is a host bridge - fill in its resources */ @@ -1272,8 +440,8 @@ void pcibios_fixup_bus(struct pci_bus *bus) res->end = IO_SPACE_LIMIT; res->flags = IORESOURCE_IO; } - res->start += io_offset; - res->end += io_offset; + res->start = (res->start + io_offset) & 0xffffffffu; + res->end = (res->end + io_offset) & 0xffffffffu; for (i = 0; i < 3; ++i) { res = &hose->mem_resources[i]; @@ -1288,35 +456,6 @@ void pcibios_fixup_bus(struct pci_bus *bus) } bus->resource[i+1] = res; } - } else { - /* This is a subordinate bridge */ - pci_read_bridge_bases(bus); - - for (i = 0; i < 4; ++i) { - if ((res = bus->resource[i]) == NULL) - continue; - if (!res->flags || bus->self->transparent) - continue; - if (io_offset && (res->flags & IORESOURCE_IO)) { - res->start += io_offset; - res->end += io_offset; - } else if (hose->pci_mem_offset - && (res->flags & IORESOURCE_MEM)) { - res->start += hose->pci_mem_offset; - res->end += hose->pci_mem_offset; - } - } - } - - /* Platform specific bus fixups */ - if (ppc_md.pcibios_fixup_bus) - ppc_md.pcibios_fixup_bus(bus); - - /* Read default IRQs and fixup if necessary */ - list_for_each_entry(dev, &bus->devices, bus_list) { - pci_read_irq_line(dev); - if (ppc_md.pci_irq_fixup) - ppc_md.pci_irq_fixup(dev); } } @@ -1328,37 +467,6 @@ pcibios_update_irq(struct pci_dev *dev, int irq) /* XXX FIXME - update OF device tree node interrupt property */ } -int pcibios_enable_device(struct pci_dev *dev, int mask) -{ - u16 cmd, old_cmd; - int idx; - struct resource *r; - - if (ppc_md.pcibios_enable_device_hook) - if (ppc_md.pcibios_enable_device_hook(dev, 0)) - return -EINVAL; - - pci_read_config_word(dev, PCI_COMMAND, &cmd); - old_cmd = cmd; - for (idx=0; idx<6; idx++) { - r = &dev->resource[idx]; - if (r->flags & IORESOURCE_UNSET) { - printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev)); - return -EINVAL; - } - if (r->flags & IORESOURCE_IO) - cmd |= PCI_COMMAND_IO; - if (r->flags & IORESOURCE_MEM) - cmd |= PCI_COMMAND_MEMORY; - } - if (cmd != old_cmd) { - printk("PCI: Enabling device %s (%04x -> %04x)\n", - pci_name(dev), old_cmd, cmd); - pci_write_config_word(dev, PCI_COMMAND, cmd); - } - return 0; -} - static struct pci_controller* pci_bus_to_hose(int bus) { @@ -1381,17 +489,6 @@ long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn) 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_is(powermac) && machine_is_compatible("MacRISC4")) - if (bus == 0) - bus = 0xf0; -#endif /* CONFIG_PPC_PMAC */ - hose = pci_bus_to_hose(bus); if (!hose) return -ENODEV; |