ACPICA: Utilities: Add _CLS processing
ACPICA commit 9a2b638acb3a7215209432e070c6bd0312374229 ACPI Device object often contains a _CLS object to supply PCI-defined class code for the device. This patch introduces logic to process the _CLS object. Suravee Suthikulpanit, Lv Zheng. Link: https://github.com/acpica/acpica/commit/9a2b638a Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Suravee Suthikulpanit
Rafael J. Wysocki
Родитель
cbc823405a
Коммит
f65358e572
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@ -468,6 +468,8 @@ void acpi_ex_eisa_id_to_string(char *dest, u64 compressed_id);
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void acpi_ex_integer_to_string(char *dest, u64 value);
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void acpi_ex_pci_cls_to_string(char *dest, u8 class_code[3]);
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u8 acpi_is_valid_space_id(u8 space_id);
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/*
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@ -430,6 +430,10 @@ acpi_status
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acpi_ut_execute_CID(struct acpi_namespace_node *device_node,
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struct acpi_pnp_device_id_list ** return_cid_list);
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acpi_status
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acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
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struct acpi_pnp_device_id **return_id);
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/*
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* utlock - reader/writer locks
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*/
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@ -378,6 +378,38 @@ void acpi_ex_integer_to_string(char *out_string, u64 value)
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_pci_cls_to_string
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*
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* PARAMETERS: out_string - Where to put the converted string (7 bytes)
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* PARAMETERS: class_code - PCI class code to be converted (3 bytes)
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*
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* RETURN: None
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*
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* DESCRIPTION: Convert 3-bytes PCI class code to string representation.
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* Return buffer must be large enough to hold the string. The
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* string returned is always exactly of length
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* ACPI_PCICLS_STRING_SIZE (includes null terminator).
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*
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******************************************************************************/
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void acpi_ex_pci_cls_to_string(char *out_string, u8 class_code[3])
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{
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ACPI_FUNCTION_ENTRY();
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/* All 3 bytes are hexadecimal */
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out_string[0] = acpi_ut_hex_to_ascii_char((u64)class_code[0], 4);
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out_string[1] = acpi_ut_hex_to_ascii_char((u64)class_code[0], 0);
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out_string[2] = acpi_ut_hex_to_ascii_char((u64)class_code[1], 4);
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out_string[3] = acpi_ut_hex_to_ascii_char((u64)class_code[1], 0);
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out_string[4] = acpi_ut_hex_to_ascii_char((u64)class_code[2], 4);
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out_string[5] = acpi_ut_hex_to_ascii_char((u64)class_code[2], 0);
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out_string[6] = 0;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_is_valid_space_id
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@ -260,7 +260,7 @@ static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
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* control methods (Such as in the case of a device.)
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*
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* For Device and Processor objects, run the Device _HID, _UID, _CID, _SUB,
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* _STA, _ADR, _sx_w, and _sx_d methods.
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* _CLS, _STA, _ADR, _sx_w, and _sx_d methods.
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*
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* Note: Allocates the return buffer, must be freed by the caller.
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*
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@ -276,11 +276,12 @@ acpi_get_object_info(acpi_handle handle,
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struct acpi_pnp_device_id *hid = NULL;
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struct acpi_pnp_device_id *uid = NULL;
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struct acpi_pnp_device_id *sub = NULL;
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struct acpi_pnp_device_id *cls = NULL;
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char *next_id_string;
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acpi_object_type type;
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acpi_name name;
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u8 param_count = 0;
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u8 valid = 0;
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u16 valid = 0;
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u32 info_size;
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u32 i;
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acpi_status status;
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@ -320,7 +321,7 @@ acpi_get_object_info(acpi_handle handle,
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if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) {
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/*
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* Get extra info for ACPI Device/Processor objects only:
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* Run the Device _HID, _UID, _SUB, and _CID methods.
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* Run the Device _HID, _UID, _SUB, _CID, and _CLS methods.
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*
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* Note: none of these methods are required, so they may or may
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* not be present for this device. The Info->Valid bitfield is used
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@ -363,6 +364,14 @@ acpi_get_object_info(acpi_handle handle,
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sizeof(struct acpi_pnp_device_id_list));
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valid |= ACPI_VALID_CID;
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}
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/* Execute the Device._CLS method */
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status = acpi_ut_execute_CLS(node, &cls);
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if (ACPI_SUCCESS(status)) {
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info_size += cls->length;
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valid |= ACPI_VALID_CLS;
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}
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}
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/*
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@ -486,6 +495,11 @@ acpi_get_object_info(acpi_handle handle,
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}
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}
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if (cls) {
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next_id_string = acpi_ns_copy_device_id(&info->class_code,
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cls, next_id_string);
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}
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/* Copy the fixed-length data */
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info->info_size = info_size;
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@ -510,6 +524,9 @@ cleanup:
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if (cid_list) {
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ACPI_FREE(cid_list);
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}
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if (cls) {
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ACPI_FREE(cls);
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}
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return (status);
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}
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@ -1,6 +1,6 @@
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/******************************************************************************
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*
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* Module Name: utids - support for device Ids - HID, UID, CID
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* Module Name: utids - support for device Ids - HID, UID, CID, SUB, CLS
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*
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*****************************************************************************/
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@ -416,3 +416,92 @@ cleanup:
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_CLS
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*
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* PARAMETERS: device_node - Node for the device
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* return_id - Where the _CLS is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _CLS control method that returns PCI-defined
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* class code of the device. The _CLS value is always a package
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* containing PCI class information as a list of integers.
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* The returned string has format "BBSSPP", where:
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* BB = Base-class code
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* SS = Sub-class code
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* PP = Programming Interface code
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
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struct acpi_pnp_device_id **return_id)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object **cls_objects;
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u32 count;
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struct acpi_pnp_device_id *cls;
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u32 length;
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acpi_status status;
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u8 class_code[3] = { 0, 0, 0 };
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ACPI_FUNCTION_TRACE(ut_execute_CLS);
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status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CLS,
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ACPI_BTYPE_PACKAGE, &obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the size of the String to be returned, includes null terminator */
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length = ACPI_PCICLS_STRING_SIZE;
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cls_objects = obj_desc->package.elements;
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count = obj_desc->package.count;
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if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
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if (count > 0
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&& cls_objects[0]->common.type == ACPI_TYPE_INTEGER) {
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class_code[0] = (u8)cls_objects[0]->integer.value;
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}
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if (count > 1
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&& cls_objects[1]->common.type == ACPI_TYPE_INTEGER) {
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class_code[1] = (u8)cls_objects[1]->integer.value;
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}
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if (count > 2
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&& cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
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class_code[2] = (u8)cls_objects[2]->integer.value;
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}
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}
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/* Allocate a buffer for the CLS */
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cls =
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
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(acpi_size) length);
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if (!cls) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Area for the string starts after PNP_DEVICE_ID struct */
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cls->string =
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ACPI_ADD_PTR(char, cls, sizeof(struct acpi_pnp_device_id));
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/* Simply copy existing string */
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acpi_ex_pci_cls_to_string(cls->string, class_code);
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cls->length = length;
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*return_id = cls;
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cleanup:
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/* On exit, we must delete the return object */
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acpi_ut_remove_reference(obj_desc);
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return_ACPI_STATUS(status);
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}
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@ -51,6 +51,7 @@
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#define METHOD_NAME__BBN "_BBN"
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#define METHOD_NAME__CBA "_CBA"
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#define METHOD_NAME__CID "_CID"
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#define METHOD_NAME__CLS "_CLS"
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#define METHOD_NAME__CRS "_CRS"
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#define METHOD_NAME__DDN "_DDN"
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#define METHOD_NAME__HID "_HID"
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@ -1141,6 +1141,10 @@ u32 (*acpi_interface_handler) (acpi_string interface_name, u32 supported);
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#define ACPI_UUID_LENGTH 16
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/* Length of 3-byte PCI class code values when converted back to a string */
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#define ACPI_PCICLS_STRING_SIZE 7 /* Includes null terminator */
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/* Structures used for device/processor HID, UID, CID, and SUB */
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struct acpi_pnp_device_id {
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@ -1163,7 +1167,7 @@ struct acpi_device_info {
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u32 name; /* ACPI object Name */
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acpi_object_type type; /* ACPI object Type */
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u8 param_count; /* If a method, required parameter count */
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u8 valid; /* Indicates which optional fields are valid */
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u16 valid; /* Indicates which optional fields are valid */
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u8 flags; /* Miscellaneous info */
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u8 highest_dstates[4]; /* _sx_d values: 0xFF indicates not valid */
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u8 lowest_dstates[5]; /* _sx_w values: 0xFF indicates not valid */
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@ -1172,6 +1176,7 @@ struct acpi_device_info {
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struct acpi_pnp_device_id hardware_id; /* _HID value */
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struct acpi_pnp_device_id unique_id; /* _UID value */
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struct acpi_pnp_device_id subsystem_id; /* _SUB value */
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struct acpi_pnp_device_id class_code; /* _CLS value */
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struct acpi_pnp_device_id_list compatible_id_list; /* _CID list <must be last> */
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};
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@ -1181,14 +1186,15 @@ struct acpi_device_info {
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/* Flags for Valid field above (acpi_get_object_info) */
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#define ACPI_VALID_STA 0x01
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#define ACPI_VALID_ADR 0x02
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#define ACPI_VALID_HID 0x04
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#define ACPI_VALID_UID 0x08
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#define ACPI_VALID_SUB 0x10
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#define ACPI_VALID_CID 0x20
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#define ACPI_VALID_SXDS 0x40
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#define ACPI_VALID_SXWS 0x80
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#define ACPI_VALID_STA 0x0001
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#define ACPI_VALID_ADR 0x0002
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#define ACPI_VALID_HID 0x0004
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#define ACPI_VALID_UID 0x0008
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#define ACPI_VALID_SUB 0x0010
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#define ACPI_VALID_CID 0x0020
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#define ACPI_VALID_CLS 0x0040
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#define ACPI_VALID_SXDS 0x0100
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#define ACPI_VALID_SXWS 0x0200
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/* Flags for _STA return value (current_status above) */
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