From 3a9622dc4659af44a8098a233f65c51e495ff0a5 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 29 Oct 2009 11:04:50 +0800 Subject: [PATCH] ACPI: cleanup pci_root _OSC code. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/pci_root.c | 76 ++++++++--------------------------------- include/linux/acpi.h | 5 +-- 2 files changed, 17 insertions(+), 64 deletions(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 1af808171d46..101cce3681d1 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -202,72 +202,24 @@ static void acpi_pci_bridge_scan(struct acpi_device *device) } } -static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, - 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66}; +static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; static acpi_status acpi_pci_run_osc(acpi_handle handle, const u32 *capbuf, u32 *retval) { + struct acpi_osc_context context = { + .uuid_str = pci_osc_uuid_str, + .rev = 1, + .cap.length = 12, + .cap.pointer = (void *)capbuf, + }; acpi_status status; - struct acpi_object_list input; - union acpi_object in_params[4]; - struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; - union acpi_object *out_obj; - u32 errors; - - /* Setting up input parameters */ - input.count = 4; - input.pointer = in_params; - in_params[0].type = ACPI_TYPE_BUFFER; - in_params[0].buffer.length = 16; - in_params[0].buffer.pointer = OSC_UUID; - in_params[1].type = ACPI_TYPE_INTEGER; - in_params[1].integer.value = 1; - in_params[2].type = ACPI_TYPE_INTEGER; - in_params[2].integer.value = 3; - in_params[3].type = ACPI_TYPE_BUFFER; - in_params[3].buffer.length = 12; - in_params[3].buffer.pointer = (u8 *)capbuf; - - status = acpi_evaluate_object(handle, "_OSC", &input, &output); - if (ACPI_FAILURE(status)) - return status; - if (!output.length) - return AE_NULL_OBJECT; - - out_obj = output.pointer; - if (out_obj->type != ACPI_TYPE_BUFFER) { - printk(KERN_DEBUG "_OSC evaluation returned wrong type\n"); - status = AE_TYPE; - goto out_kfree; - } - /* Need to ignore the bit0 in result code */ - errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); - if (errors) { - if (errors & OSC_REQUEST_ERROR) - printk(KERN_DEBUG "_OSC request failed\n"); - if (errors & OSC_INVALID_UUID_ERROR) - printk(KERN_DEBUG "_OSC invalid UUID\n"); - if (errors & OSC_INVALID_REVISION_ERROR) - printk(KERN_DEBUG "_OSC invalid revision\n"); - if (errors & OSC_CAPABILITIES_MASK_ERROR) { - if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE) - goto out_success; - printk(KERN_DEBUG - "Firmware did not grant requested _OSC control\n"); - status = AE_SUPPORT; - goto out_kfree; - } - status = AE_ERROR; - goto out_kfree; + status = acpi_run_osc(handle, &context); + if (ACPI_SUCCESS(status)) { + *retval = *((u32 *)(context.ret.pointer + 8)); + kfree(context.ret.pointer); } -out_success: - *retval = *((u32 *)(out_obj->buffer.pointer + 8)); - status = AE_OK; - -out_kfree: - kfree(output.pointer); return status; } @@ -277,10 +229,10 @@ static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) u32 support_set, result, capbuf[3]; /* do _OSC query for all possible controls */ - support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS); + support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS); capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_TYPE] = support_set; - capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS; + capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; status = acpi_pci_run_osc(root->device->handle, capbuf, &result); if (ACPI_SUCCESS(status)) { @@ -427,7 +379,7 @@ acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) if (ACPI_FAILURE(status)) return status; - control_req = (flags & OSC_CONTROL_MASKS); + control_req = (flags & OSC_PCI_CONTROL_MASKS); if (!control_req) return AE_TYPE; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 3247e09db20d..535beecc37cf 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -263,7 +263,6 @@ struct acpi_osc_context { #define OSC_QUERY_TYPE 0 #define OSC_SUPPORT_TYPE 1 #define OSC_CONTROL_TYPE 2 -#define OSC_SUPPORT_MASKS 0x1f /* _OSC DW0 Definition */ #define OSC_QUERY_ENABLE 1 @@ -274,12 +273,14 @@ struct acpi_osc_context { acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); +/* PCI defined _OSC bits */ /* _OSC DW1 Definition (OS Support Fields) */ #define OSC_EXT_PCI_CONFIG_SUPPORT 1 #define OSC_ACTIVE_STATE_PWR_SUPPORT 2 #define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4 #define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8 #define OSC_MSI_SUPPORT 16 +#define OSC_PCI_SUPPORT_MASKS 0x1f /* _OSC DW1 Definition (OS Control Fields) */ #define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1 @@ -288,7 +289,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); #define OSC_PCI_EXPRESS_AER_CONTROL 8 #define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16 -#define OSC_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ +#define OSC_PCI_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ OSC_SHPC_NATIVE_HP_CONTROL | \ OSC_PCI_EXPRESS_PME_CONTROL | \ OSC_PCI_EXPRESS_AER_CONTROL | \ -- 2.20.1