diff options
Diffstat (limited to 'drivers/acpi/acpica/nsxfobj.c')
-rw-r--r-- | drivers/acpi/acpica/nsxfobj.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsxfobj.c b/drivers/acpi/acpica/nsxfobj.c new file mode 100644 index 000000000000..80e6322d59c5 --- /dev/null +++ b/drivers/acpi/acpica/nsxfobj.c @@ -0,0 +1,287 @@ +/******************************************************************************* + * + * 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) |