| /******************************************************************************* |
| * |
| * Module Name: nsxfobj - Public interfaces to the ACPI subsystem |
| * ACPI Object oriented interfaces |
| * |
| ******************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2008, Intel Corp. |
| * 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 <acpi/acpi.h> |
| #include <acpi/accommon.h> |
| #include <acpi/acnamesp.h> |
| |
| #define _COMPONENT ACPI_NAMESPACE |
| ACPI_MODULE_NAME("nsxfobj") |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_get_id |
| * |
| * PARAMETERS: Handle - Handle of object whose id is desired |
| * ret_id - Where the id will be placed |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: This routine returns the owner id associated with a handle |
| * |
| ******************************************************************************/ |
| acpi_status acpi_get_id(acpi_handle handle, acpi_owner_id * ret_id) |
| { |
| struct acpi_namespace_node *node; |
| acpi_status status; |
| |
| /* Parameter Validation */ |
| |
| if (!ret_id) { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| 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_id = node->owner_id; |
| |
| status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| return (status); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_get_id) |
| |
| /******************************************************************************* |
| * |
| * 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); |
| } |
| |
| ACPI_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); |
| } |
| |
| ACPI_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); |
| } |
| |
| ACPI_EXPORT_SYMBOL(acpi_get_next_object) |