diff options
| -rw-r--r-- | drivers/pci/hotplug/acpiphp_glue.c | 127 | ||||
| -rw-r--r-- | include/linux/pci_ids.h | 2 |
2 files changed, 129 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index b4a92123625..424e7de181a 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -552,6 +552,132 @@ static void remove_bridge(acpi_handle handle) } } +static struct pci_dev * get_apic_pci_info(acpi_handle handle) +{ + struct acpi_pci_id id; + struct pci_bus *bus; + struct pci_dev *dev; + + if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) + return NULL; + + bus = pci_find_bus(id.segment, id.bus); + if (!bus) + return NULL; + + dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); + if (!dev) + return NULL; + + if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && + (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) + { + pci_dev_put(dev); + return NULL; + } + + return dev; +} + +static int get_gsi_base(acpi_handle handle, u32 *gsi_base) +{ + acpi_status status; + int result = -1; + unsigned long gsb; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + union acpi_object *obj; + void *table; + + status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); + if (ACPI_SUCCESS(status)) { + *gsi_base = (u32)gsb; + return 0; + } + + status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); + if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) + return -1; + + obj = buffer.pointer; + if (obj->type != ACPI_TYPE_BUFFER) + goto out; + + table = obj->buffer.pointer; + switch (((acpi_table_entry_header *)table)->type) { + case ACPI_MADT_IOSAPIC: + *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base; + result = 0; + break; + case ACPI_MADT_IOAPIC: + *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base; + result = 0; + break; + default: + break; + } + out: + acpi_os_free(buffer.pointer); + return result; +} + +static acpi_status +ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) +{ + acpi_status status; + unsigned long sta; + acpi_handle tmp; + struct pci_dev *pdev; + u32 gsi_base; + u64 phys_addr; + + /* Evaluate _STA if present */ + status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); + if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) + return AE_CTRL_DEPTH; + + /* Scan only PCI bus scope */ + status = acpi_get_handle(handle, "_HID", &tmp); + if (ACPI_SUCCESS(status)) + return AE_CTRL_DEPTH; + + if (get_gsi_base(handle, &gsi_base)) + return AE_OK; + + pdev = get_apic_pci_info(handle); + if (!pdev) + return AE_OK; + + if (pci_enable_device(pdev)) { + pci_dev_put(pdev); + return AE_OK; + } + + pci_set_master(pdev); + + if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) { + pci_disable_device(pdev); + pci_dev_put(pdev); + return AE_OK; + } + + phys_addr = pci_resource_start(pdev, 0); + if (acpi_register_ioapic(handle, phys_addr, gsi_base)) { + pci_release_region(pdev, 0); + pci_disable_device(pdev); + pci_dev_put(pdev); + return AE_OK; + } + + return AE_OK; +} + +static int acpiphp_configure_ioapics(acpi_handle handle) +{ + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, + ACPI_UINT32_MAX, ioapic_add, NULL, NULL); + return 0; +} + static int power_on_slot(struct acpiphp_slot *slot) { acpi_status status; @@ -942,6 +1068,7 @@ static int acpiphp_configure_bridge (acpi_handle handle) acpiphp_sanitize_bus(bus); acpiphp_set_hpp_values(handle, bus); pci_enable_bridges(bus); + acpiphp_configure_ioapics(handle); return 0; } diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index bf608808a60..810bbbcee40 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -62,6 +62,8 @@ #define PCI_BASE_CLASS_SYSTEM 0x08 #define PCI_CLASS_SYSTEM_PIC 0x0800 +#define PCI_CLASS_SYSTEM_PIC_IOAPIC 0x080010 +#define PCI_CLASS_SYSTEM_PIC_IOXAPIC 0x080020 #define PCI_CLASS_SYSTEM_DMA 0x0801 #define PCI_CLASS_SYSTEM_TIMER 0x0802 #define PCI_CLASS_SYSTEM_RTC 0x0803 |