50df4d8b0f
acpi.h now includes only the "public" acpica headers. All other acpica headers are "private" and should not be included by acpica users. One new file, accommon.h is used to include the commonly used private headers for acpica code generation. Future plans are to move all private headers to a new subdirectory. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
360 lines
10 KiB
C
360 lines
10 KiB
C
/******************************************************************************
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*
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* Module Name: nsxfname - Public interfaces to the ACPI subsystem
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* ACPI Namespace oriented interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/accommon.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsxfname")
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/******************************************************************************
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*
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* FUNCTION: acpi_get_handle
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*
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* PARAMETERS: Parent - Object to search under (search scope).
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* Pathname - Pointer to an asciiz string containing the
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* name
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* ret_handle - Where the return handle is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine will search for a caller specified name in the
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* name space. The caller can restrict the search region by
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* specifying a non NULL parent. The parent value is itself a
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* namespace handle.
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*
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******************************************************************************/
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acpi_status
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acpi_get_handle(acpi_handle parent,
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acpi_string pathname, acpi_handle * ret_handle)
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{
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acpi_status status;
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struct acpi_namespace_node *node = NULL;
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struct acpi_namespace_node *prefix_node = NULL;
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ACPI_FUNCTION_ENTRY();
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/* Parameter Validation */
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if (!ret_handle || !pathname) {
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return (AE_BAD_PARAMETER);
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}
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/* Convert a parent handle to a prefix node */
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if (parent) {
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prefix_node = acpi_ns_map_handle_to_node(parent);
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if (!prefix_node) {
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return (AE_BAD_PARAMETER);
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}
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}
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/*
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* Valid cases are:
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* 1) Fully qualified pathname
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* 2) Parent + Relative pathname
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*
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* Error for <null Parent + relative path>
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*/
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if (acpi_ns_valid_root_prefix(pathname[0])) {
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/* Pathname is fully qualified (starts with '\') */
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/* Special case for root-only, since we can't search for it */
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if (!ACPI_STRCMP(pathname, ACPI_NS_ROOT_PATH)) {
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*ret_handle =
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acpi_ns_convert_entry_to_handle(acpi_gbl_root_node);
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return (AE_OK);
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}
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} else if (!prefix_node) {
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/* Relative path with null prefix is disallowed */
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return (AE_BAD_PARAMETER);
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}
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/* Find the Node and convert to a handle */
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status =
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acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, &node);
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if (ACPI_SUCCESS(status)) {
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*ret_handle = acpi_ns_convert_entry_to_handle(node);
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}
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_handle)
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/******************************************************************************
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*
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* FUNCTION: acpi_get_name
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*
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* PARAMETERS: Handle - Handle to be converted to a pathname
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* name_type - Full pathname or single segment
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* Buffer - Buffer for returned path
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*
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* RETURN: Pointer to a string containing the fully qualified Name.
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*
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* DESCRIPTION: This routine returns the fully qualified name associated with
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* the Handle parameter. This and the acpi_pathname_to_handle are
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* complementary functions.
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*
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******************************************************************************/
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acpi_status
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acpi_get_name(acpi_handle handle, u32 name_type, struct acpi_buffer * buffer)
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{
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acpi_status status;
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struct acpi_namespace_node *node;
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/* Parameter validation */
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if (name_type > ACPI_NAME_TYPE_MAX) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_ut_validate_buffer(buffer);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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if (name_type == ACPI_FULL_PATHNAME) {
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/* Get the full pathname (From the namespace root) */
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status = acpi_ns_handle_to_pathname(handle, buffer);
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return (status);
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}
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/*
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* Wants the single segment ACPI name.
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* Validate handle and convert to a namespace Node
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*/
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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node = acpi_ns_map_handle_to_node(handle);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer(buffer, ACPI_PATH_SEGMENT_LENGTH);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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/* Just copy the ACPI name from the Node and zero terminate it */
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ACPI_STRNCPY(buffer->pointer, acpi_ut_get_node_name(node),
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ACPI_NAME_SIZE);
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((char *)buffer->pointer)[ACPI_NAME_SIZE] = 0;
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status = AE_OK;
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_name)
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/******************************************************************************
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*
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* FUNCTION: acpi_get_object_info
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*
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* PARAMETERS: Handle - Object Handle
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* Buffer - Where the info is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns information about an object as gleaned from the
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* namespace node and possibly by running several standard
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* control methods (Such as in the case of a device.)
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*
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******************************************************************************/
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acpi_status
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acpi_get_object_info(acpi_handle handle, struct acpi_buffer * buffer)
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{
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acpi_status status;
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struct acpi_namespace_node *node;
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struct acpi_device_info *info;
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struct acpi_device_info *return_info;
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struct acpi_compatible_id_list *cid_list = NULL;
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acpi_size size;
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/* Parameter validation */
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if (!handle || !buffer) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_ut_validate_buffer(buffer);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_device_info));
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if (!info) {
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return (AE_NO_MEMORY);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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node = acpi_ns_map_handle_to_node(handle);
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if (!node) {
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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status = AE_BAD_PARAMETER;
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goto cleanup;
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}
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/* Init return structure */
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size = sizeof(struct acpi_device_info);
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info->type = node->type;
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info->name = node->name.integer;
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info->valid = 0;
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if (node->type == ACPI_TYPE_METHOD) {
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info->param_count = node->object->method.param_count;
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}
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status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* If not a device, we are all done */
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if (info->type == ACPI_TYPE_DEVICE) {
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/*
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* Get extra info for ACPI Devices objects only:
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* Run the Device _HID, _UID, _CID, _STA, _ADR and _sx_d methods.
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*
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* Note: none of these methods are required, so they may or may
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* not be present for this device. The Info->Valid bitfield is used
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* to indicate which methods were found and ran successfully.
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*/
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/* Execute the Device._HID method */
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status = acpi_ut_execute_HID(node, &info->hardware_id);
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if (ACPI_SUCCESS(status)) {
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info->valid |= ACPI_VALID_HID;
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}
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/* Execute the Device._UID method */
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status = acpi_ut_execute_UID(node, &info->unique_id);
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if (ACPI_SUCCESS(status)) {
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info->valid |= ACPI_VALID_UID;
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}
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/* Execute the Device._CID method */
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status = acpi_ut_execute_CID(node, &cid_list);
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if (ACPI_SUCCESS(status)) {
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size += cid_list->size;
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info->valid |= ACPI_VALID_CID;
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}
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/* Execute the Device._STA method */
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status = acpi_ut_execute_STA(node, &info->current_status);
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if (ACPI_SUCCESS(status)) {
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info->valid |= ACPI_VALID_STA;
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}
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/* Execute the Device._ADR method */
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status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node,
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&info->address);
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if (ACPI_SUCCESS(status)) {
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info->valid |= ACPI_VALID_ADR;
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}
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/* Execute the Device._sx_d methods */
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status = acpi_ut_execute_sxds(node, info->highest_dstates);
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if (ACPI_SUCCESS(status)) {
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info->valid |= ACPI_VALID_SXDS;
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}
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}
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/* Validate/Allocate/Clear caller buffer */
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status = acpi_ut_initialize_buffer(buffer, size);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* Populate the return buffer */
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return_info = buffer->pointer;
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ACPI_MEMCPY(return_info, info, sizeof(struct acpi_device_info));
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if (cid_list) {
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ACPI_MEMCPY(&return_info->compatibility_id, cid_list,
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cid_list->size);
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}
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cleanup:
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ACPI_FREE(info);
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if (cid_list) {
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ACPI_FREE(cid_list);
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}
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_object_info)
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