You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
262 lines
7.2 KiB
262 lines
7.2 KiB
/*******************************************************************************
|
|
*
|
|
* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
|
|
* ACPI Object oriented interfaces
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2005, R. Byron Moore
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <acpi/acpi.h>
|
|
#include <acpi/acnamesp.h>
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nsxfobj")
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_type
|
|
*
|
|
* PARAMETERS: Handle - Handle of object whose type is desired
|
|
* *ret_type - Where the type will be placed
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This routine returns the type associatd with a particular handle
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_type (
|
|
acpi_handle handle,
|
|
acpi_object_type *ret_type)
|
|
{
|
|
struct acpi_namespace_node *node;
|
|
acpi_status status;
|
|
|
|
|
|
/* Parameter Validation */
|
|
|
|
if (!ret_type) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Special case for the predefined Root Node
|
|
* (return type ANY)
|
|
*/
|
|
if (handle == ACPI_ROOT_OBJECT) {
|
|
*ret_type = ACPI_TYPE_ANY;
|
|
return (AE_OK);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
node = acpi_ns_map_handle_to_node (handle);
|
|
if (!node) {
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
*ret_type = node->type;
|
|
|
|
|
|
status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_type);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_parent
|
|
*
|
|
* PARAMETERS: Handle - Handle of object whose parent is desired
|
|
* ret_handle - Where the parent handle will be placed
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Returns a handle to the parent of the object represented by
|
|
* Handle.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_parent (
|
|
acpi_handle handle,
|
|
acpi_handle *ret_handle)
|
|
{
|
|
struct acpi_namespace_node *node;
|
|
acpi_status status;
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* Convert and validate the handle */
|
|
|
|
node = acpi_ns_map_handle_to_node (handle);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Get the parent entry */
|
|
|
|
*ret_handle =
|
|
acpi_ns_convert_entry_to_handle (acpi_ns_get_parent_node (node));
|
|
|
|
/* Return exception if parent is null */
|
|
|
|
if (!acpi_ns_get_parent_node (node)) {
|
|
status = AE_NULL_ENTRY;
|
|
}
|
|
|
|
|
|
unlock_and_exit:
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_parent);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_next_object
|
|
*
|
|
* PARAMETERS: Type - Type of object to be searched for
|
|
* Parent - Parent object whose children we are getting
|
|
* 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
|
|
*
|
|
* DESCRIPTION: Return the next peer object within the namespace. If Handle is
|
|
* valid, Scope is ignored. Otherwise, the first object within
|
|
* Scope is returned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_next_object (
|
|
acpi_object_type type,
|
|
acpi_handle parent,
|
|
acpi_handle child,
|
|
acpi_handle *ret_handle)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_namespace_node *node;
|
|
struct acpi_namespace_node *parent_node = NULL;
|
|
struct acpi_namespace_node *child_node = NULL;
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (type > ACPI_TYPE_EXTERNAL_MAX) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* If null handle, use the parent */
|
|
|
|
if (!child) {
|
|
/* Start search at the beginning of the specified scope */
|
|
|
|
parent_node = acpi_ns_map_handle_to_node (parent);
|
|
if (!parent_node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
else {
|
|
/* Non-null handle, ignore the parent */
|
|
/* Convert and validate the handle */
|
|
|
|
child_node = acpi_ns_map_handle_to_node (child);
|
|
if (!child_node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
/* Internal function does the real work */
|
|
|
|
node = acpi_ns_get_next_node (type, parent_node, child_node);
|
|
if (!node) {
|
|
status = AE_NOT_FOUND;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
if (ret_handle) {
|
|
*ret_handle = acpi_ns_convert_entry_to_handle (node);
|
|
}
|
|
|
|
|
|
unlock_and_exit:
|
|
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
|
|
return (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_get_next_object);
|
|
|
|
|