diff options
Diffstat (limited to 'drivers/acpi/glue.c')
-rw-r--r-- | drivers/acpi/glue.c | 121 |
1 files changed, 1 insertions, 120 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index a2f46d587d5..7b6c9ff9beb 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -86,125 +86,6 @@ static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle) return ret; } -/* Get PCI root bridge's handle from its segment and bus number */ -struct acpi_find_pci_root { - unsigned int seg; - unsigned int bus; - acpi_handle handle; -}; - -static acpi_status -do_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) -{ - unsigned long *busnr = (unsigned long *)data; - struct acpi_resource_address64 address; - - if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && - resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && - resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) - return AE_OK; - - acpi_resource_to_address64(resource, &address); - if ((address.address_length > 0) && - (address.resource_type == ACPI_BUS_NUMBER_RANGE)) - *busnr = address.minimum; - - return AE_OK; -} - -static int get_root_bridge_busnr(acpi_handle handle) -{ - acpi_status status; - unsigned long bus, bbn; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - - acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - - status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, - &bbn); - if (status == AE_NOT_FOUND) { - /* Assume bus = 0 */ - printk(KERN_INFO PREFIX - "Assume root bridge [%s] bus is 0\n", - (char *)buffer.pointer); - status = AE_OK; - bbn = 0; - } - if (ACPI_FAILURE(status)) { - bbn = -ENODEV; - goto exit; - } - if (bbn > 0) - goto exit; - - /* _BBN in some systems return 0 for all root bridges */ - bus = -1; - status = acpi_walk_resources(handle, METHOD_NAME__CRS, - do_root_bridge_busnr_callback, &bus); - /* If _CRS failed, we just use _BBN */ - if (ACPI_FAILURE(status) || (bus == -1)) - goto exit; - /* We select _CRS */ - if (bbn != bus) { - printk(KERN_INFO PREFIX - "_BBN and _CRS returns different value for %s. Select _CRS\n", - (char *)buffer.pointer); - bbn = bus; - } - exit: - kfree(buffer.pointer); - return (int)bbn; -} - -static acpi_status -find_pci_rootbridge(acpi_handle handle, u32 lvl, void *context, void **rv) -{ - struct acpi_find_pci_root *find = (struct acpi_find_pci_root *)context; - unsigned long seg, bus; - acpi_status status; - int tmp; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - - acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - - status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &seg); - if (status == AE_NOT_FOUND) { - /* Assume seg = 0 */ - status = AE_OK; - seg = 0; - } - if (ACPI_FAILURE(status)) { - status = AE_CTRL_DEPTH; - goto exit; - } - - tmp = get_root_bridge_busnr(handle); - if (tmp < 0) { - printk(KERN_ERR PREFIX - "Find root bridge failed for %s\n", - (char *)buffer.pointer); - status = AE_CTRL_DEPTH; - goto exit; - } - bus = tmp; - - if (seg == find->seg && bus == find->bus) - find->handle = handle; - status = AE_OK; - exit: - kfree(buffer.pointer); - return status; -} - -acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) -{ - struct acpi_find_pci_root find = { seg, bus, NULL }; - - acpi_get_devices(PCI_ROOT_HID_STRING, find_pci_rootbridge, &find, NULL); - return find.handle; -} -EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); - /* Get device's handler per its address under its parent */ struct acpi_find_child { acpi_handle handle; @@ -217,7 +98,7 @@ do_acpi_find_child(acpi_handle handle, u32 lvl, void *context, void **rv) acpi_status status; struct acpi_device_info *info; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - struct acpi_find_child *find = (struct acpi_find_child *)context; + struct acpi_find_child *find = context; status = acpi_get_object_info(handle, &buffer); if (ACPI_SUCCESS(status)) { |