On Monday, March 30, 2015 04:56:17 PM Suravee Suthikulpanit wrote:
ACPI Device configuration often contain _CLS object to suppy PCI-defined class code for the device. This patch introduces logic to process the _CLS object.
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
As you know, this patch is for ACPICA, so I'd prefer it to go into upstream ACPICA first and then to Linux from there.
I can apply the remaining two patches on top of it when that happens.
Would that work or is it a really big deal?
drivers/acpi/acpica/acutils.h | 3 ++ drivers/acpi/acpica/nsxfname.c | 21 ++++++++++-- drivers/acpi/acpica/utids.c | 73 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h index c2f03e8..2aef850 100644 --- a/drivers/acpi/acpica/acutils.h +++ b/drivers/acpi/acpica/acutils.h @@ -430,6 +430,9 @@ acpi_status acpi_ut_execute_CID(struct acpi_namespace_node *device_node, struct acpi_pnp_device_id_list ** return_cid_list); +acpi_status +acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
struct acpi_pnp_device_id **return_id);
/*
- utlock - reader/writer locks
*/ diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c index d66c326..590ef06 100644 --- a/drivers/acpi/acpica/nsxfname.c +++ b/drivers/acpi/acpica/nsxfname.c @@ -276,11 +276,12 @@ acpi_get_object_info(acpi_handle handle, struct acpi_pnp_device_id *hid = NULL; struct acpi_pnp_device_id *uid = NULL; struct acpi_pnp_device_id *sub = NULL;
- struct acpi_pnp_device_id *cls = NULL; char *next_id_string; acpi_object_type type; acpi_name name; u8 param_count = 0;
- u8 valid = 0;
- u16 valid = 0; u32 info_size; u32 i; acpi_status status;
@@ -320,7 +321,7 @@ acpi_get_object_info(acpi_handle handle, if ((type == ACPI_TYPE_DEVICE) || (type == ACPI_TYPE_PROCESSOR)) { /* * Get extra info for ACPI Device/Processor objects only:
* Run the Device _HID, _UID, _SUB, and _CID methods.
* Run the Device _HID, _UID, _SUB, _CID and _CLS methods.
- Note: none of these methods are required, so they may or may
- not be present for this device. The Info->Valid bitfield is used
@@ -351,6 +352,14 @@ acpi_get_object_info(acpi_handle handle, valid |= ACPI_VALID_SUB; }
/* Execute the Device._CLS method */
status = acpi_ut_execute_CLS(node, &cls);
if (ACPI_SUCCESS(status)) {
info_size += cls->length;
valid |= ACPI_VALID_CLS;
}
- /* Execute the Device._CID method */
status = acpi_ut_execute_CID(node, &cid_list); @@ -468,6 +477,11 @@ acpi_get_object_info(acpi_handle handle, sub, next_id_string); }
- if (cls) {
next_id_string = acpi_ns_copy_device_id(&info->cls,
cls, next_id_string);
- }
- if (cid_list) { info->compatible_id_list.count = cid_list->count; info->compatible_id_list.list_size = cid_list->list_size;
@@ -507,6 +521,9 @@ cleanup: if (sub) { ACPI_FREE(sub); }
- if (cls) {
ACPI_FREE(cls);
- } if (cid_list) { ACPI_FREE(cid_list); }
diff --git a/drivers/acpi/acpica/utids.c b/drivers/acpi/acpica/utids.c index 27431cf..9745065 100644 --- a/drivers/acpi/acpica/utids.c +++ b/drivers/acpi/acpica/utids.c @@ -416,3 +416,76 @@ cleanup: acpi_ut_remove_reference(obj_desc); return_ACPI_STATUS(status); }
+/*******************************************************************************
- FUNCTION: acpi_ut_execute_CLS
- PARAMETERS: device_node - Node for the device
return_id - Where the string UID is returned
- RETURN: Status
- DESCRIPTION: Executes the _CLS control method that returns PCI-defined
class code of the device. The ACPI spec define _CLS as a
package with three integers. The returned string has format:
"bbsspp"
where:
bb = Base-class code
ss = Sub-class code
pp = Programming Interface code
- ******************************************************************************/
+acpi_status +acpi_ut_execute_CLS(struct acpi_namespace_node *device_node,
struct acpi_pnp_device_id **return_id)
+{
- struct acpi_pnp_device_id *cls;
- union acpi_operand_object *obj_desc;
- union acpi_operand_object **cls_objects;
- acpi_status status;
- ACPI_FUNCTION_TRACE(ut_execute_CLS);
- status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CLS,
ACPI_BTYPE_PACKAGE, &obj_desc);
- if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
- cls_objects = obj_desc->package.elements;
- if (obj_desc->common.type == ACPI_TYPE_PACKAGE &&
obj_desc->package.count == 3 &&
cls_objects[0]->common.type == ACPI_TYPE_INTEGER &&
cls_objects[1]->common.type == ACPI_TYPE_INTEGER &&
cls_objects[2]->common.type == ACPI_TYPE_INTEGER) {
/* Allocate a buffer for the CLS */
cls = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pnp_device_id) +
(acpi_size) 7);
if (!cls) {
status = AE_NO_MEMORY;
goto cleanup;
}
cls->string =
ACPI_ADD_PTR(char, cls, sizeof(struct acpi_pnp_device_id));
sprintf(cls->string, "%02x%02x%02x",
(u8)ACPI_TO_INTEGER(cls_objects[0]->integer.value),
(u8)ACPI_TO_INTEGER(cls_objects[1]->integer.value),
(u8)ACPI_TO_INTEGER(cls_objects[2]->integer.value));
cls->length = 7;
*return_id = cls;
- } else {
status = AE_AML_OPERAND_TYPE;
- }
+cleanup:
- /* On exit, we must delete the return object */
- acpi_ut_remove_reference(obj_desc);
- return_ACPI_STATUS(status);
+}