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@@ -58,6 +58,10 @@ static acpi_status
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acpi_ns_init_one_device(acpi_handle obj_handle,
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acpi_ns_init_one_device(acpi_handle obj_handle,
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u32 nesting_level, void *context, void **return_value);
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u32 nesting_level, void *context, void **return_value);
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+static acpi_status
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+acpi_ns_find_ini_methods(acpi_handle obj_handle,
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+ u32 nesting_level, void *context, void **return_value);
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+
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/*******************************************************************************
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/*******************************************************************************
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*
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*
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* FUNCTION: acpi_ns_initialize_objects
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* FUNCTION: acpi_ns_initialize_objects
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@@ -76,7 +80,7 @@ acpi_status acpi_ns_initialize_objects(void)
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acpi_status status;
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acpi_status status;
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struct acpi_init_walk_info info;
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struct acpi_init_walk_info info;
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- ACPI_FUNCTION_TRACE("ns_initialize_objects");
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+ ACPI_FUNCTION_TRACE(ns_initialize_objects);
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"**** Starting initialization of namespace objects ****\n"));
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"**** Starting initialization of namespace objects ****\n"));
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@@ -93,7 +97,7 @@ acpi_status acpi_ns_initialize_objects(void)
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ACPI_UINT32_MAX, acpi_ns_init_one_object,
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ACPI_UINT32_MAX, acpi_ns_init_one_object,
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&info, NULL);
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&info, NULL);
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if (ACPI_FAILURE(status)) {
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if (ACPI_FAILURE(status)) {
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- ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace"));
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+ ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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@@ -133,7 +137,7 @@ acpi_status acpi_ns_initialize_devices(void)
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acpi_status status;
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acpi_status status;
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struct acpi_device_walk_info info;
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struct acpi_device_walk_info info;
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- ACPI_FUNCTION_TRACE("ns_initialize_devices");
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+ ACPI_FUNCTION_TRACE(ns_initialize_devices);
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/* Init counters */
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/* Init counters */
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@@ -142,28 +146,29 @@ acpi_status acpi_ns_initialize_devices(void)
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info.num_INI = 0;
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info.num_INI = 0;
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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- "Executing all Device _STA and_INI methods:"));
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+ "Initializing Device/Processor/Thermal objects by executing _INI methods:"));
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+
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+ /* Tree analysis: find all subtrees that contain _INI methods */
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- status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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+ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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+ ACPI_UINT32_MAX, FALSE,
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+ acpi_ns_find_ini_methods, &info, NULL);
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if (ACPI_FAILURE(status)) {
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if (ACPI_FAILURE(status)) {
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- return_ACPI_STATUS(status);
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+ ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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}
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- /* Walk namespace for all objects */
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+ /* Walk namespace to execute all _INIs on present devices */
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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- ACPI_UINT32_MAX, TRUE,
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+ ACPI_UINT32_MAX, FALSE,
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acpi_ns_init_one_device, &info, NULL);
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acpi_ns_init_one_device, &info, NULL);
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-
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- (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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-
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if (ACPI_FAILURE(status)) {
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if (ACPI_FAILURE(status)) {
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- ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace"));
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+ ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
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}
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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- "\n%hd Devices found - executed %hd _STA, %hd _INI methods\n",
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- info.device_count, info.num_STA, info.num_INI));
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+ "\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n",
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+ info.num_INI, info.num_STA, info.device_count));
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return_ACPI_STATUS(status);
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return_ACPI_STATUS(status);
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}
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}
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@@ -200,7 +205,7 @@ acpi_ns_init_one_object(acpi_handle obj_handle,
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(struct acpi_namespace_node *)obj_handle;
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(struct acpi_namespace_node *)obj_handle;
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *obj_desc;
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- ACPI_FUNCTION_NAME("ns_init_one_object");
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+ ACPI_FUNCTION_NAME(ns_init_one_object);
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info->object_count++;
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info->object_count++;
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@@ -309,6 +314,72 @@ acpi_ns_init_one_object(acpi_handle obj_handle,
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return (AE_OK);
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return (AE_OK);
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}
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}
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_ns_find_ini_methods
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+ *
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+ * PARAMETERS: acpi_walk_callback
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+ *
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+ * RETURN: acpi_status
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+ *
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+ * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
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+ * device/processor/thermal objects, and marks the entire subtree
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+ * with a SUBTREE_HAS_INI flag. This flag is used during the
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+ * subsequent device initialization walk to avoid entire subtrees
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+ * that do not contain an _INI.
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+ *
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+ ******************************************************************************/
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+
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+static acpi_status
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+acpi_ns_find_ini_methods(acpi_handle obj_handle,
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+ u32 nesting_level, void *context, void **return_value)
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+{
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+ struct acpi_device_walk_info *info =
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+ ACPI_CAST_PTR(struct acpi_device_walk_info, context);
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+ struct acpi_namespace_node *node;
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+ struct acpi_namespace_node *parent_node;
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+
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+ /* Keep count of device/processor/thermal objects */
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+
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+ node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
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+ if ((node->type == ACPI_TYPE_DEVICE) ||
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+ (node->type == ACPI_TYPE_PROCESSOR) ||
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+ (node->type == ACPI_TYPE_THERMAL)) {
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+ info->device_count++;
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+ return (AE_OK);
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+ }
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+
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+ /* We are only looking for methods named _INI */
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+
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+ if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) {
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+ return (AE_OK);
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+ }
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+
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+ /*
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+ * The only _INI methods that we care about are those that are
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+ * present under Device, Processor, and Thermal objects.
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+ */
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+ parent_node = acpi_ns_get_parent_node(node);
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+ switch (parent_node->type) {
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+ case ACPI_TYPE_DEVICE:
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+ case ACPI_TYPE_PROCESSOR:
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+ case ACPI_TYPE_THERMAL:
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+
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+ /* Mark parent and bubble up the INI present flag to the root */
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+
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+ while (parent_node) {
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+ parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
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+ parent_node = acpi_ns_get_parent_node(parent_node);
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+ }
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+ break;
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+
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+ default:
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+ break;
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+ }
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+
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+ return (AE_OK);
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+}
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+
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/*******************************************************************************
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/*******************************************************************************
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*
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*
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* FUNCTION: acpi_ns_init_one_device
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* FUNCTION: acpi_ns_init_one_device
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@@ -328,64 +399,49 @@ acpi_ns_init_one_device(acpi_handle obj_handle,
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u32 nesting_level, void *context, void **return_value)
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u32 nesting_level, void *context, void **return_value)
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{
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{
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struct acpi_device_walk_info *info =
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struct acpi_device_walk_info *info =
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- (struct acpi_device_walk_info *)context;
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+ ACPI_CAST_PTR(struct acpi_device_walk_info, context);
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struct acpi_parameter_info pinfo;
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struct acpi_parameter_info pinfo;
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u32 flags;
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u32 flags;
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acpi_status status;
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acpi_status status;
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- struct acpi_namespace_node *ini_node;
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struct acpi_namespace_node *device_node;
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struct acpi_namespace_node *device_node;
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- ACPI_FUNCTION_TRACE("ns_init_one_device");
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+ ACPI_FUNCTION_TRACE(ns_init_one_device);
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- device_node = acpi_ns_map_handle_to_node(obj_handle);
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- if (!device_node) {
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- return_ACPI_STATUS(AE_BAD_PARAMETER);
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- }
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+ /* We are interested in Devices, Processors and thermal_zones only */
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- /*
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- * We will run _STA/_INI on Devices, Processors and thermal_zones only
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- */
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+ device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
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if ((device_node->type != ACPI_TYPE_DEVICE) &&
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if ((device_node->type != ACPI_TYPE_DEVICE) &&
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(device_node->type != ACPI_TYPE_PROCESSOR) &&
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(device_node->type != ACPI_TYPE_PROCESSOR) &&
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(device_node->type != ACPI_TYPE_THERMAL)) {
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(device_node->type != ACPI_TYPE_THERMAL)) {
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return_ACPI_STATUS(AE_OK);
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return_ACPI_STATUS(AE_OK);
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}
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}
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- if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
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- (!(acpi_dbg_level & ACPI_LV_INFO))) {
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- ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
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- }
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-
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- info->device_count++;
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-
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/*
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/*
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- * Check if the _INI method exists for this device -
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- * if _INI does not exist, there is no need to run _STA
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- * No _INI means device requires no initialization
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+ * Because of an earlier namespace analysis, all subtrees that contain an
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+ * _INI method are tagged.
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+ *
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+ * If this device subtree does not contain any _INI methods, we
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+ * can exit now and stop traversing this entire subtree.
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*/
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*/
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- status = acpi_ns_search_node(*ACPI_CAST_PTR(u32, METHOD_NAME__INI),
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- device_node, ACPI_TYPE_METHOD, &ini_node);
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- if (ACPI_FAILURE(status)) {
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-
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- /* No _INI method found - move on to next device */
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-
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- return_ACPI_STATUS(AE_OK);
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+ if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
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+ return_ACPI_STATUS(AE_CTRL_DEPTH);
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}
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}
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/*
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/*
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- * Run _STA to determine if we can run _INI on the device -
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- * the device must be present before _INI can be run.
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- * However, _STA is not required - assume device present if no _STA
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+ * Run _STA to determine if this device is present and functioning. We
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+ * must know this information for two important reasons (from ACPI spec):
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+ *
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+ * 1) We can only run _INI if the device is present.
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+ * 2) We must abort the device tree walk on this subtree if the device is
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+ * not present and is not functional (we will not examine the children)
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+ *
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+ * The _STA method is not required to be present under the device, we
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+ * assume the device is present if _STA does not exist.
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*/
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*/
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- ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD,
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- device_node,
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- METHOD_NAME__STA));
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+ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
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+ (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
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- pinfo.node = device_node;
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- pinfo.parameters = NULL;
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- pinfo.parameter_type = ACPI_PARAM_ARGS;
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-
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- status = acpi_ut_execute_STA(pinfo.node, &flags);
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+ status = acpi_ut_execute_STA(device_node, &flags);
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if (ACPI_FAILURE(status)) {
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if (ACPI_FAILURE(status)) {
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/* Ignore error and move on to next device */
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/* Ignore error and move on to next device */
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@@ -393,55 +449,108 @@ acpi_ns_init_one_device(acpi_handle obj_handle,
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return_ACPI_STATUS(AE_OK);
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return_ACPI_STATUS(AE_OK);
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}
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}
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+ /*
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+ * Flags == -1 means that _STA was not found. In this case, we assume that
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+ * the device is both present and functional.
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+ *
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+ * From the ACPI spec, description of _STA:
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+ *
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+ * "If a device object (including the processor object) does not have an
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+ * _STA object, then OSPM assumes that all of the above bits are set (in
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+ * other words, the device is present, ..., and functioning)"
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+ */
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if (flags != ACPI_UINT32_MAX) {
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if (flags != ACPI_UINT32_MAX) {
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info->num_STA++;
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info->num_STA++;
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}
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}
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+ /*
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+ * Examine the PRESENT and FUNCTIONING status bits
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+ *
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+ * Note: ACPI spec does not seem to specify behavior for the present but
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+ * not functioning case, so we assume functioning if present.
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+ */
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if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
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if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
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- /* Don't look at children of a not present device */
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-
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- return_ACPI_STATUS(AE_CTRL_DEPTH);
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+ /* Device is not present, we must examine the Functioning bit */
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+
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+ if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
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+ /*
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+ * Device is not present but is "functioning". In this case,
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+ * we will not run _INI, but we continue to examine the children
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+ * of this device.
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+ *
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+ * From the ACPI spec, description of _STA: (Note - no mention
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+ * of whether to run _INI or not on the device in question)
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+ *
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+ * "_STA may return bit 0 clear (not present) with bit 3 set
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+ * (device is functional). This case is used to indicate a valid
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+ * device for which no device driver should be loaded (for example,
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+ * a bridge device.) Children of this device may be present and
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+ * valid. OSPM should continue enumeration below a device whose
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+ * _STA returns this bit combination"
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+ */
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+ return_ACPI_STATUS(AE_OK);
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+ } else {
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+ /*
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+ * Device is not present and is not functioning. We must abort the
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+ * walk of this subtree immediately -- don't look at the children
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+ * of such a device.
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+ *
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+ * From the ACPI spec, description of _INI:
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+ *
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+ * "If the _STA method indicates that the device is not present,
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+ * OSPM will not run the _INI and will not examine the children
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+ * of the device for _INI methods"
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+ */
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+ return_ACPI_STATUS(AE_CTRL_DEPTH);
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+ }
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}
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}
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/*
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/*
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- * The device is present and _INI exists. Run the _INI method.
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- * (We already have the _INI node from above)
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|
|
|
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+ * The device is present or is assumed present if no _STA exists.
|
|
|
|
+ * Run the _INI if it exists (not required to exist)
|
|
|
|
+ *
|
|
|
|
+ * Note: We know there is an _INI within this subtree, but it may not be
|
|
|
|
+ * under this particular device, it may be lower in the branch.
|
|
*/
|
|
*/
|
|
- ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD,
|
|
|
|
- pinfo.node,
|
|
|
|
- METHOD_NAME__INI));
|
|
|
|
|
|
+ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
|
|
|
|
+ (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI));
|
|
|
|
|
|
- pinfo.node = ini_node;
|
|
|
|
- status = acpi_ns_evaluate_by_handle(&pinfo);
|
|
|
|
- if (ACPI_FAILURE(status)) {
|
|
|
|
-
|
|
|
|
- /* Ignore error and move on to next device */
|
|
|
|
-
|
|
|
|
-#ifdef ACPI_DEBUG_OUTPUT
|
|
|
|
- char *scope_name = acpi_ns_get_external_pathname(ini_node);
|
|
|
|
|
|
+ pinfo.node = device_node;
|
|
|
|
+ pinfo.parameters = NULL;
|
|
|
|
+ pinfo.parameter_type = ACPI_PARAM_ARGS;
|
|
|
|
|
|
- ACPI_WARNING((AE_INFO, "%s._INI failed: %s",
|
|
|
|
- scope_name, acpi_format_exception(status)));
|
|
|
|
|
|
+ status = acpi_ns_evaluate_relative(METHOD_NAME__INI, &pinfo);
|
|
|
|
+ if (ACPI_SUCCESS(status)) {
|
|
|
|
|
|
- ACPI_FREE(scope_name);
|
|
|
|
-#endif
|
|
|
|
- } else {
|
|
|
|
/* Delete any return object (especially if implicit_return is enabled) */
|
|
/* Delete any return object (especially if implicit_return is enabled) */
|
|
|
|
|
|
if (pinfo.return_object) {
|
|
if (pinfo.return_object) {
|
|
acpi_ut_remove_reference(pinfo.return_object);
|
|
acpi_ut_remove_reference(pinfo.return_object);
|
|
}
|
|
}
|
|
|
|
|
|
- /* Count of successful INIs */
|
|
|
|
-
|
|
|
|
info->num_INI++;
|
|
info->num_INI++;
|
|
|
|
+ if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) &&
|
|
|
|
+ (!(acpi_dbg_level & ACPI_LV_INFO))) {
|
|
|
|
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
|
|
|
|
+ }
|
|
}
|
|
}
|
|
|
|
+#ifdef ACPI_DEBUG_OUTPUT
|
|
|
|
+ else if (status != AE_NOT_FOUND) {
|
|
|
|
|
|
- if (acpi_gbl_init_handler) {
|
|
|
|
|
|
+ /* Ignore error and move on to next device */
|
|
|
|
+
|
|
|
|
+ char *scope_name = acpi_ns_get_external_pathname(pinfo.node);
|
|
|
|
|
|
- /* External initialization handler is present, call it */
|
|
|
|
|
|
+ ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution",
|
|
|
|
+ scope_name));
|
|
|
|
+ ACPI_FREE(scope_name);
|
|
|
|
+ }
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
+ /* If an external initialization handler is present, call it */
|
|
|
|
+
|
|
|
|
+ if (acpi_gbl_init_handler) {
|
|
status =
|
|
status =
|
|
acpi_gbl_init_handler(pinfo.node, ACPI_INIT_DEVICE_INI);
|
|
acpi_gbl_init_handler(pinfo.node, ACPI_INIT_DEVICE_INI);
|
|
}
|
|
}
|