2018-03-15 07:13:07 +08:00
|
|
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
2005-04-17 06:20:36 +08:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
|
|
|
|
* ACPI Object oriented interfaces
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2013-10-29 09:29:51 +08:00
|
|
|
#define EXPORT_ACPI_INTERFACES
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <acpi/acpi.h>
|
2009-01-09 13:30:03 +08:00
|
|
|
#include "accommon.h"
|
|
|
|
#include "acnamesp.h"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
2005-08-05 12:44:28 +08:00
|
|
|
ACPI_MODULE_NAME("nsxfobj")
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_get_type
|
|
|
|
*
|
2012-07-12 09:40:10 +08:00
|
|
|
* PARAMETERS: handle - Handle of object whose type is desired
|
2005-04-19 10:49:35 +08:00
|
|
|
* ret_type - Where the type will be placed
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
2020-10-08 10:53:57 +08:00
|
|
|
* DESCRIPTION: This routine returns the type associated with a particular
|
|
|
|
* handle
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
2016-05-05 12:57:53 +08:00
|
|
|
acpi_status acpi_get_type(acpi_handle handle, acpi_object_type *ret_type)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
struct acpi_namespace_node *node;
|
|
|
|
acpi_status status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Parameter Validation */
|
|
|
|
|
|
|
|
if (!ret_type) {
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
|
|
}
|
|
|
|
|
2015-12-29 13:54:36 +08:00
|
|
|
/* Special case for the predefined Root Node (return type ANY) */
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (handle == ACPI_ROOT_OBJECT) {
|
|
|
|
*ret_type = ACPI_TYPE_ANY;
|
|
|
|
return (AE_OK);
|
|
|
|
}
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
|
2009-12-11 14:57:00 +08:00
|
|
|
node = acpi_ns_validate_handle(handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!node) {
|
2005-08-05 12:44:28 +08:00
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
2005-04-17 06:20:36 +08:00
|
|
|
return (AE_BAD_PARAMETER);
|
|
|
|
}
|
|
|
|
|
|
|
|
*ret_type = node->type;
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
2006-10-03 12:00:00 +08:00
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_type)
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_get_parent
|
|
|
|
*
|
2012-07-12 09:40:10 +08:00
|
|
|
* PARAMETERS: handle - Handle of object whose parent is desired
|
2005-04-17 06:20:36 +08:00
|
|
|
* ret_handle - Where the parent handle will be placed
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Returns a handle to the parent of the object represented by
|
|
|
|
* Handle.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
2016-05-05 12:57:53 +08:00
|
|
|
acpi_status acpi_get_parent(acpi_handle handle, acpi_handle *ret_handle)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
struct acpi_namespace_node *node;
|
2009-05-21 10:59:15 +08:00
|
|
|
struct acpi_namespace_node *parent_node;
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_status status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (!ret_handle) {
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Special case for the predefined Root Node (no parent) */
|
|
|
|
|
|
|
|
if (handle == ACPI_ROOT_OBJECT) {
|
|
|
|
return (AE_NULL_ENTRY);
|
|
|
|
}
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
|
2009-12-11 14:57:00 +08:00
|
|
|
node = acpi_ns_validate_handle(handle);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!node) {
|
|
|
|
status = AE_BAD_PARAMETER;
|
|
|
|
goto unlock_and_exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get the parent entry */
|
|
|
|
|
2010-05-26 11:53:07 +08:00
|
|
|
parent_node = node->parent;
|
2009-12-11 14:57:00 +08:00
|
|
|
*ret_handle = ACPI_CAST_PTR(acpi_handle, parent_node);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Return exception if parent is null */
|
|
|
|
|
2009-05-21 10:59:15 +08:00
|
|
|
if (!parent_node) {
|
2005-04-17 06:20:36 +08:00
|
|
|
status = AE_NULL_ENTRY;
|
|
|
|
}
|
|
|
|
|
2013-10-29 09:30:02 +08:00
|
|
|
unlock_and_exit:
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
2006-10-03 12:00:00 +08:00
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_parent)
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_get_next_object
|
|
|
|
*
|
2012-07-12 09:40:10 +08:00
|
|
|
* PARAMETERS: type - Type of object to be searched for
|
|
|
|
* parent - Parent object whose children we are getting
|
2005-04-17 06:20:36 +08:00
|
|
|
* last_child - Previous child that was found.
|
|
|
|
* The NEXT child will be returned
|
|
|
|
* ret_handle - Where handle to the next object is placed
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
2012-10-31 10:26:55 +08:00
|
|
|
* DESCRIPTION: Return the next peer object within the namespace. If Handle is
|
|
|
|
* valid, Scope is ignored. Otherwise, the first object within
|
2005-04-17 06:20:36 +08:00
|
|
|
* Scope is returned.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_get_next_object(acpi_object_type type,
|
|
|
|
acpi_handle parent,
|
2016-05-05 12:57:53 +08:00
|
|
|
acpi_handle child, acpi_handle *ret_handle)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_status status;
|
|
|
|
struct acpi_namespace_node *node;
|
|
|
|
struct acpi_namespace_node *parent_node = NULL;
|
|
|
|
struct acpi_namespace_node *child_node = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
|
|
|
|
if (type > ACPI_TYPE_EXTERNAL_MAX) {
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
|
|
}
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If null handle, use the parent */
|
|
|
|
|
|
|
|
if (!child) {
|
2006-10-02 12:00:00 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Start search at the beginning of the specified scope */
|
|
|
|
|
2009-12-11 14:57:00 +08:00
|
|
|
parent_node = acpi_ns_validate_handle(parent);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!parent_node) {
|
|
|
|
status = AE_BAD_PARAMETER;
|
|
|
|
goto unlock_and_exit;
|
|
|
|
}
|
2005-08-05 12:44:28 +08:00
|
|
|
} else {
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Non-null handle, ignore the parent */
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
|
2009-12-11 14:57:00 +08:00
|
|
|
child_node = acpi_ns_validate_handle(child);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!child_node) {
|
|
|
|
status = AE_BAD_PARAMETER;
|
|
|
|
goto unlock_and_exit;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Internal function does the real work */
|
|
|
|
|
2009-05-21 10:27:51 +08:00
|
|
|
node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
|
2005-04-17 06:20:36 +08:00
|
|
|
if (!node) {
|
|
|
|
status = AE_NOT_FOUND;
|
|
|
|
goto unlock_and_exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret_handle) {
|
2009-12-11 14:57:00 +08:00
|
|
|
*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2013-10-29 09:30:02 +08:00
|
|
|
unlock_and_exit:
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
2005-04-17 06:20:36 +08:00
|
|
|
return (status);
|
|
|
|
}
|
|
|
|
|
2006-10-03 12:00:00 +08:00
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_next_object)
|