-
-ACPI_EXPORT_SYMBOL(acpi_rs_match_vendor_resource)
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_walk_resources
- *
- * PARAMETERS: device_handle - Handle to the device object for the
- * device we are querying
- * Name - Method name of the resources we want
- * (METHOD_NAME__CRS or METHOD_NAME__PRS)
- * user_function - Called for each resource
- * Context - Passed to user_function
- *
- * RETURN: Status
- *
- * DESCRIPTION: Retrieves the current or possible resource list for the
- * specified device. The user_function is called once for
- * each resource in the list.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_walk_resources(acpi_handle device_handle,
- char *name,
- acpi_walk_resource_callback user_function, void *context)
-{
- acpi_status status;
- struct acpi_buffer buffer;
- struct acpi_resource *resource;
- struct acpi_resource *resource_end;
-
- ACPI_FUNCTION_TRACE(acpi_walk_resources);
-
- /* Parameter validation */
-
- if (!device_handle || !user_function || !name ||
- (!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
- !ACPI_COMPARE_NAME(name, METHOD_NAME__PRS))) {
- return_ACPI_STATUS(AE_BAD_PARAMETER);
- }
-
- /* Get the _CRS or _PRS resource list */
-
- buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
- status = acpi_rs_get_method_data(device_handle, name, &buffer);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
- /* Buffer now contains the resource list */
-
- resource = ACPI_CAST_PTR(struct acpi_resource, buffer.pointer);
- resource_end =
- ACPI_ADD_PTR(struct acpi_resource, buffer.pointer, buffer.length);
-
- /* Walk the resource list until the end_tag is found (or buffer end) */
-
- while (resource < resource_end) {
-
- /* Sanity check the resource */
-
- if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
- status = AE_AML_INVALID_RESOURCE_TYPE;
- break;
- }
-
- /* Invoke the user function, abort on any error returned */
-
- status = user_function(resource, context);
- if (ACPI_FAILURE(status)) {
- if (status == AE_CTRL_TERMINATE) {
-
- /* This is an OK termination by the user function */
-
- status = AE_OK;
- }
- break;
- }
-
- /* end_tag indicates end-of-list */
-
- if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
- break;
- }
-
- /* Get the next resource descriptor */
-
- resource =
- ACPI_ADD_PTR(struct acpi_resource, resource,
- resource->length);
- }
-
- ACPI_FREE(buffer.pointer);
- return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_walk_resources)