diff options
Diffstat (limited to 'arch/x86/pci/acpi.c')
| -rw-r--r-- | arch/x86/pci/acpi.c | 194 |
1 files changed, 188 insertions, 6 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index bc8a44bddaa..2d88f7c6d6a 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -2,15 +2,199 @@ #include <linux/acpi.h> #include <linux/init.h> #include <linux/irq.h> +#include <linux/dmi.h> #include <asm/numa.h> #include "pci.h" +static int __devinit can_skip_ioresource_align(const struct dmi_system_id *d) +{ + pci_probe |= PCI_CAN_SKIP_ISA_ALIGN; + printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident); + return 0; +} + +static struct dmi_system_id acpi_pciprobe_dmi_table[] = { +/* + * Systems where PCI IO resource ISA alignment can be skipped + * when the ISA enable bit in the bridge control is not set + */ + { + .callback = can_skip_ioresource_align, + .ident = "IBM System x3800", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "IBM"), + DMI_MATCH(DMI_PRODUCT_NAME, "x3800"), + }, + }, + { + .callback = can_skip_ioresource_align, + .ident = "IBM System x3850", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "IBM"), + DMI_MATCH(DMI_PRODUCT_NAME, "x3850"), + }, + }, + { + .callback = can_skip_ioresource_align, + .ident = "IBM System x3950", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "IBM"), + DMI_MATCH(DMI_PRODUCT_NAME, "x3950"), + }, + }, + {} +}; + +struct pci_root_info { + char *name; + unsigned int res_num; + struct resource *res; + struct pci_bus *bus; + int busnum; +}; + +static acpi_status +resource_to_addr(struct acpi_resource *resource, + struct acpi_resource_address64 *addr) +{ + acpi_status status; + + status = acpi_resource_to_address64(resource, addr); + if (ACPI_SUCCESS(status) && + (addr->resource_type == ACPI_MEMORY_RANGE || + addr->resource_type == ACPI_IO_RANGE) && + addr->address_length > 0 && + addr->producer_consumer == ACPI_PRODUCER) { + return AE_OK; + } + return AE_ERROR; +} + +static acpi_status +count_resource(struct acpi_resource *acpi_res, void *data) +{ + struct pci_root_info *info = data; + struct acpi_resource_address64 addr; + acpi_status status; + + status = resource_to_addr(acpi_res, &addr); + if (ACPI_SUCCESS(status)) + info->res_num++; + return AE_OK; +} + +static acpi_status +setup_resource(struct acpi_resource *acpi_res, void *data) +{ + struct pci_root_info *info = data; + struct resource *res; + struct acpi_resource_address64 addr; + acpi_status status; + unsigned long flags; + struct resource *root; + + status = resource_to_addr(acpi_res, &addr); + if (!ACPI_SUCCESS(status)) + return AE_OK; + + if (addr.resource_type == ACPI_MEMORY_RANGE) { + root = &iomem_resource; + flags = IORESOURCE_MEM; + if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) + flags |= IORESOURCE_PREFETCH; + } else if (addr.resource_type == ACPI_IO_RANGE) { + root = &ioport_resource; + flags = IORESOURCE_IO; + } else + return AE_OK; + + res = &info->res[info->res_num]; + res->name = info->name; + res->flags = flags; + res->start = addr.minimum + addr.translation_offset; + res->end = res->start + addr.address_length - 1; + res->child = NULL; + + if (insert_resource(root, res)) { + printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx " + "from %s for %s\n", (unsigned long) res->start, + (unsigned long) res->end, root->name, info->name); + } else { + info->bus->resource[info->res_num] = res; + info->res_num++; + } + return AE_OK; +} + +static void +adjust_transparent_bridge_resources(struct pci_bus *bus) +{ + struct pci_dev *dev; + + list_for_each_entry(dev, &bus->devices, bus_list) { + int i; + u16 class = dev->class >> 8; + + if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) { + for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++) + dev->subordinate->resource[i] = + dev->bus->resource[i - 3]; + } + } +} + +static void +get_current_resources(struct acpi_device *device, int busnum, + struct pci_bus *bus) +{ + struct pci_root_info info; + size_t size; + + info.bus = bus; + info.res_num = 0; + acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource, + &info); + if (!info.res_num) + return; + + size = sizeof(*info.res) * info.res_num; + info.res = kmalloc(size, GFP_KERNEL); + if (!info.res) + goto res_alloc_fail; + + info.name = kmalloc(12, GFP_KERNEL); + if (!info.name) + goto name_alloc_fail; + sprintf(info.name, "PCI Bus #%02x", busnum); + + info.res_num = 0; + acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource, + &info); + if (info.res_num) + adjust_transparent_bridge_resources(bus); + + return; + +name_alloc_fail: + kfree(info.res); +res_alloc_fail: + return; +} + struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum) { struct pci_bus *bus; struct pci_sysdata *sd; int pxm; + dmi_check_system(acpi_pciprobe_dmi_table); + + if (domain && !pci_domains_supported) { + printk(KERN_WARNING "PCI: Multiple domains not supported " + "(dom %d, bus %d)\n", domain, busnum); + return NULL; + } + /* Allocate per-root-bus (not per bus) arch-specific data. * TODO: leak; this memory is never freed. * It's arguable whether it's worth the trouble to care. @@ -21,12 +205,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do return NULL; } - if (domain != 0) { - printk(KERN_WARNING "PCI: Multiple domains not supported\n"); - kfree(sd); - return NULL; - } - + sd->domain = domain; sd->node = -1; pxm = acpi_get_pxm(device->handle); @@ -47,6 +226,9 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do } } #endif + + if (bus && (pci_probe & PCI_USE__CRS)) + get_current_resources(device, busnum, bus); return bus; } |