*****************************************************************************/
/*
- * Copyright (C) 2000 - 2004, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGES.
*/
-
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_NAMESPACE
- ACPI_MODULE_NAME ("nsinit")
+ACPI_MODULE_NAME("nsinit")
+
+/* Local prototypes */
+static acpi_status
+acpi_ns_init_one_object(acpi_handle obj_handle,
+ u32 level, void *context, void **return_value);
+
+static acpi_status
+acpi_ns_init_one_device(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value);
+static acpi_status
+acpi_ns_find_ini_methods(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value);
/*******************************************************************************
*
*
******************************************************************************/
-acpi_status
-acpi_ns_initialize_objects (
- void)
+acpi_status acpi_ns_initialize_objects(void)
{
- acpi_status status;
- struct acpi_init_walk_info info;
-
-
- ACPI_FUNCTION_TRACE ("ns_initialize_objects");
+ acpi_status status;
+ struct acpi_init_walk_info info;
+ ACPI_FUNCTION_TRACE(ns_initialize_objects);
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "**** Starting initialization of namespace objects ****\n"));
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Completing Region/Field/Buffer/Package initialization:"));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "**** Starting initialization of namespace objects ****\n"));
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ "Completing Region/Field/Buffer/Package initialization:"));
/* Set all init info to zero */
- ACPI_MEMSET (&info, 0, sizeof (struct acpi_init_walk_info));
+ ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));
/* Walk entire namespace from the supplied root */
- status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, acpi_ns_init_one_object,
- &info, NULL);
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
- acpi_format_exception (status)));
+ status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, acpi_ns_init_one_object,
+ &info, NULL);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
}
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
- "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
- info.op_region_init, info.op_region_count,
- info.field_init, info.field_count,
- info.buffer_init, info.buffer_count,
- info.package_init, info.package_count, info.object_count));
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
+ info.op_region_init, info.op_region_count,
+ info.field_init, info.field_count,
+ info.buffer_init, info.buffer_count,
+ info.package_init, info.package_count,
+ info.object_count));
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "%hd Control Methods found\n", info.method_count));
- ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
- "%hd Op Regions found\n", info.op_region_count));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "%hd Control Methods found\n", info.method_count));
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "%hd Op Regions found\n", info.op_region_count));
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ns_initialize_devices
*
******************************************************************************/
-acpi_status
-acpi_ns_initialize_devices (
- void)
+acpi_status acpi_ns_initialize_devices(void)
{
- acpi_status status;
- struct acpi_device_walk_info info;
-
-
- ACPI_FUNCTION_TRACE ("ns_initialize_devices");
+ acpi_status status;
+ struct acpi_device_walk_info info;
+ ACPI_FUNCTION_TRACE(ns_initialize_devices);
/* Init counters */
info.num_STA = 0;
info.num_INI = 0;
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Executing all Device _STA and_INI methods:"));
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ "Initializing Device/Processor/Thermal objects by executing _INI methods:"));
- status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
+ /* Tree analysis: find all subtrees that contain _INI methods */
+
+ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, FALSE,
+ acpi_ns_find_ini_methods, &info, NULL);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
}
- /* Walk namespace for all objects of type Device or Processor */
+ /* Allocate the evaluation information block */
- status = acpi_ns_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX, TRUE, acpi_ns_init_one_device, &info, NULL);
+ info.evaluate_info =
+ ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
+ if (!info.evaluate_info) {
+ status = AE_NO_MEMORY;
+ goto error_exit;
+ }
- (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ /* Walk namespace to execute all _INIs on present devices */
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",
- acpi_format_exception (status)));
+ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX, FALSE,
+ acpi_ns_init_one_device, &info, NULL);
+
+ ACPI_FREE(info.evaluate_info);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
}
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
- "\n%hd Devices found containing: %hd _STA, %hd _INI methods\n",
- info.device_count, info.num_STA, info.num_INI));
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
+ "\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n",
+ info.num_INI, info.num_STA, info.device_count));
- return_ACPI_STATUS (status);
-}
+ return_ACPI_STATUS(status);
+ error_exit:
+ ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
+ return_ACPI_STATUS(status);
+}
/*******************************************************************************
*
*
******************************************************************************/
-acpi_status
-acpi_ns_init_one_object (
- acpi_handle obj_handle,
- u32 level,
- void *context,
- void **return_value)
+static acpi_status
+acpi_ns_init_one_object(acpi_handle obj_handle,
+ u32 level, void *context, void **return_value)
{
- acpi_object_type type;
- acpi_status status;
- struct acpi_init_walk_info *info = (struct acpi_init_walk_info *) context;
- struct acpi_namespace_node *node = (struct acpi_namespace_node *) obj_handle;
- union acpi_operand_object *obj_desc;
-
-
- ACPI_FUNCTION_NAME ("ns_init_one_object");
+ acpi_object_type type;
+ acpi_status status;
+ struct acpi_init_walk_info *info =
+ (struct acpi_init_walk_info *)context;
+ struct acpi_namespace_node *node =
+ (struct acpi_namespace_node *)obj_handle;
+ union acpi_operand_object *obj_desc;
+ ACPI_FUNCTION_NAME(ns_init_one_object);
info->object_count++;
/* And even then, we are only interested in a few object types */
- type = acpi_ns_get_type (obj_handle);
- obj_desc = acpi_ns_get_attached_object (node);
+ type = acpi_ns_get_type(obj_handle);
+ obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
return (AE_OK);
}
/*
* Must lock the interpreter before executing AML code
*/
- status = acpi_ex_enter_interpreter ();
- if (ACPI_FAILURE (status)) {
+ status = acpi_ex_enter_interpreter();
+ if (ACPI_FAILURE(status)) {
return (status);
}
/*
- * Each of these types can contain executable AML code within
- * the declaration.
+ * Each of these types can contain executable AML code within the
+ * declaration.
*/
switch (type) {
case ACPI_TYPE_REGION:
info->op_region_init++;
- status = acpi_ds_get_region_arguments (obj_desc);
+ status = acpi_ds_get_region_arguments(obj_desc);
break;
-
case ACPI_TYPE_BUFFER_FIELD:
info->field_init++;
- status = acpi_ds_get_buffer_field_arguments (obj_desc);
+ status = acpi_ds_get_buffer_field_arguments(obj_desc);
break;
-
case ACPI_TYPE_BUFFER:
info->buffer_init++;
- status = acpi_ds_get_buffer_arguments (obj_desc);
+ status = acpi_ds_get_buffer_arguments(obj_desc);
break;
-
case ACPI_TYPE_PACKAGE:
info->package_init++;
- status = acpi_ds_get_package_arguments (obj_desc);
+ status = acpi_ds_get_package_arguments(obj_desc);
break;
default:
break;
}
- if (ACPI_FAILURE (status)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "\n"));
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Could not execute arguments for [%4.4s] (%s), %s\n",
- acpi_ut_get_node_name (node), acpi_ut_get_type_name (type),
- acpi_format_exception (status)));
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not execute arguments for [%4.4s] (%s)",
+ acpi_ut_get_node_name(node),
+ acpi_ut_get_type_name(type)));
}
- /* Print a dot for each object unless we are going to print the entire pathname */
-
+ /*
+ * Print a dot for each object unless we are going to print the entire
+ * pathname
+ */
if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
+ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
}
/*
- * We ignore errors from above, and always return OK, since
- * we don't want to abort the walk on any single error.
+ * We ignore errors from above, and always return OK, since we don't want
+ * to abort the walk on any single error.
*/
- acpi_ex_exit_interpreter ();
+ acpi_ex_exit_interpreter();
return (AE_OK);
}
-
/*******************************************************************************
*
- * FUNCTION: acpi_ns_init_one_device
+ * FUNCTION: acpi_ns_find_ini_methods
*
* PARAMETERS: acpi_walk_callback
*
* RETURN: acpi_status
*
- * DESCRIPTION: This is called once per device soon after ACPI is enabled
- * to initialize each device. It determines if the device is
- * present, and if so, calls _INI.
+ * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
+ * device/processor/thermal objects, and marks the entire subtree
+ * with a SUBTREE_HAS_INI flag. This flag is used during the
+ * subsequent device initialization walk to avoid entire subtrees
+ * that do not contain an _INI.
*
******************************************************************************/
-acpi_status
-acpi_ns_init_one_device (
- acpi_handle obj_handle,
- u32 nesting_level,
- void *context,
- void **return_value)
+static acpi_status
+acpi_ns_find_ini_methods(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value)
{
- acpi_status status;
- struct acpi_namespace_node *node;
- u32 flags;
- struct acpi_device_walk_info *info = (struct acpi_device_walk_info *) context;
-
-
- ACPI_FUNCTION_TRACE ("ns_init_one_device");
+ struct acpi_device_walk_info *info =
+ ACPI_CAST_PTR(struct acpi_device_walk_info, context);
+ struct acpi_namespace_node *node;
+ struct acpi_namespace_node *parent_node;
+
+ /* Keep count of device/processor/thermal objects */
+
+ node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+ if ((node->type == ACPI_TYPE_DEVICE) ||
+ (node->type == ACPI_TYPE_PROCESSOR) ||
+ (node->type == ACPI_TYPE_THERMAL)) {
+ info->device_count++;
+ return (AE_OK);
+ }
+ /* We are only looking for methods named _INI */
- node = acpi_ns_map_handle_to_node (obj_handle);
- if (!node) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
+ if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) {
+ return (AE_OK);
}
/*
- * We will run _STA/_INI on Devices and Processors only
+ * The only _INI methods that we care about are those that are
+ * present under Device, Processor, and Thermal objects.
*/
- if ((node->type != ACPI_TYPE_DEVICE) &&
- (node->type != ACPI_TYPE_PROCESSOR)) {
- return_ACPI_STATUS (AE_OK);
+ parent_node = acpi_ns_get_parent_node(node);
+ switch (parent_node->type) {
+ case ACPI_TYPE_DEVICE:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_THERMAL:
+
+ /* Mark parent and bubble up the INI present flag to the root */
+
+ while (parent_node) {
+ parent_node->flags |= ANOBJ_SUBTREE_HAS_INI;
+ parent_node = acpi_ns_get_parent_node(parent_node);
+ }
+ break;
+
+ default:
+ break;
}
- if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && (!(acpi_dbg_level & ACPI_LV_INFO))) {
- ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ns_init_one_device
+ *
+ * PARAMETERS: acpi_walk_callback
+ *
+ * RETURN: acpi_status
+ *
+ * DESCRIPTION: This is called once per device soon after ACPI is enabled
+ * to initialize each device. It determines if the device is
+ * present, and if so, calls _INI.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_init_one_device(acpi_handle obj_handle,
+ u32 nesting_level, void *context, void **return_value)
+{
+ struct acpi_device_walk_info *walk_info =
+ ACPI_CAST_PTR(struct acpi_device_walk_info, context);
+ struct acpi_evaluate_info *info = walk_info->evaluate_info;
+ u32 flags;
+ acpi_status status;
+ struct acpi_namespace_node *device_node;
+
+ ACPI_FUNCTION_TRACE(ns_init_one_device);
+
+ /* We are interested in Devices, Processors and thermal_zones only */
+
+ device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+ if ((device_node->type != ACPI_TYPE_DEVICE) &&
+ (device_node->type != ACPI_TYPE_PROCESSOR) &&
+ (device_node->type != ACPI_TYPE_THERMAL)) {
+ return_ACPI_STATUS(AE_OK);
}
- info->device_count++;
+ /*
+ * Because of an earlier namespace analysis, all subtrees that contain an
+ * _INI method are tagged.
+ *
+ * If this device subtree does not contain any _INI methods, we
+ * can exit now and stop traversing this entire subtree.
+ */
+ if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) {
+ return_ACPI_STATUS(AE_CTRL_DEPTH);
+ }
/*
- * Run _STA to determine if we can run _INI on the device.
+ * Run _STA to determine if this device is present and functioning. We
+ * must know this information for two important reasons (from ACPI spec):
+ *
+ * 1) We can only run _INI if the device is present.
+ * 2) We must abort the device tree walk on this subtree if the device is
+ * not present and is not functional (we will not examine the children)
+ *
+ * The _STA method is not required to be present under the device, we
+ * assume the device is present if _STA does not exist.
*/
- ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD, node, "_STA"));
- status = acpi_ut_execute_STA (node, &flags);
+ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
+ (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA));
- if (ACPI_FAILURE (status)) {
- if (node->type == ACPI_TYPE_DEVICE) {
- /* Ignore error and move on to next device */
+ status = acpi_ut_execute_STA(device_node, &flags);
+ if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS (AE_OK);
- }
+ /* Ignore error and move on to next device */
- /* _STA is not required for Processor objects */
+ return_ACPI_STATUS(AE_OK);
}
- else {
- info->num_STA++;
- if (!(flags & 0x01)) {
- /* Don't look at children of a not present device */
+ /*
+ * Flags == -1 means that _STA was not found. In this case, we assume that
+ * the device is both present and functional.
+ *
+ * From the ACPI spec, description of _STA:
+ *
+ * "If a device object (including the processor object) does not have an
+ * _STA object, then OSPM assumes that all of the above bits are set (in
+ * other words, the device is present, ..., and functioning)"
+ */
+ if (flags != ACPI_UINT32_MAX) {
+ walk_info->num_STA++;
+ }
+ /*
+ * Examine the PRESENT and FUNCTIONING status bits
+ *
+ * Note: ACPI spec does not seem to specify behavior for the present but
+ * not functioning case, so we assume functioning if present.
+ */
+ if (!(flags & ACPI_STA_DEVICE_PRESENT)) {
+
+ /* Device is not present, we must examine the Functioning bit */
+
+ if (flags & ACPI_STA_DEVICE_FUNCTIONING) {
+ /*
+ * Device is not present but is "functioning". In this case,
+ * we will not run _INI, but we continue to examine the children
+ * of this device.
+ *
+ * From the ACPI spec, description of _STA: (Note - no mention
+ * of whether to run _INI or not on the device in question)
+ *
+ * "_STA may return bit 0 clear (not present) with bit 3 set
+ * (device is functional). This case is used to indicate a valid
+ * device for which no device driver should be loaded (for example,
+ * a bridge device.) Children of this device may be present and
+ * valid. OSPM should continue enumeration below a device whose
+ * _STA returns this bit combination"
+ */
+ return_ACPI_STATUS(AE_OK);
+ } else {
+ /*
+ * Device is not present and is not functioning. We must abort the
+ * walk of this subtree immediately -- don't look at the children
+ * of such a device.
+ *
+ * From the ACPI spec, description of _INI:
+ *
+ * "If the _STA method indicates that the device is not present,
+ * OSPM will not run the _INI and will not examine the children
+ * of the device for _INI methods"
+ */
return_ACPI_STATUS(AE_CTRL_DEPTH);
}
}
/*
- * The device is present. Run _INI.
+ * 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, obj_handle, "_INI"));
- status = acpi_ns_evaluate_relative (obj_handle, "_INI", NULL, NULL);
- if (ACPI_FAILURE (status)) {
- /* No _INI (AE_NOT_FOUND) means device requires no initialization */
-
- if (status != AE_NOT_FOUND) {
- /* Ignore error and move on to next device */
-
- #ifdef ACPI_DEBUG_OUTPUT
- char *scope_name = acpi_ns_get_external_pathname (obj_handle);
+ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
+ (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI));
+
+ info->prefix_node = device_node;
+ info->pathname = METHOD_NAME__INI;
+ info->parameters = NULL;
+ info->parameter_type = ACPI_PARAM_ARGS;
+ info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+ status = acpi_ns_evaluate(info);
+ if (ACPI_SUCCESS(status)) {
+ walk_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) {
- ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "%s._INI failed: %s\n",
- scope_name, acpi_format_exception (status)));
+ /* Ignore error and move on to next device */
- ACPI_MEM_FREE (scope_name);
- #endif
- }
+ char *scope_name =
+ acpi_ns_get_external_pathname(info->resolved_node);
- status = AE_OK;
+ ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution",
+ scope_name));
+ ACPI_FREE(scope_name);
}
- else {
- /* Count of successful INIs */
+#endif
- info->num_INI++;
- }
+ /* Ignore errors from above */
- if (acpi_gbl_init_handler) {
- /* External initialization handler is present, call it */
+ status = AE_OK;
- status = acpi_gbl_init_handler (obj_handle, ACPI_INIT_DEVICE_INI);
+ /*
+ * The _INI method has been run if present; call the Global Initialization
+ * Handler for this device.
+ */
+ if (acpi_gbl_init_handler) {
+ status =
+ acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI);
}
-
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
git://git.onelab.eu / linux-2.6.git / blobdiff