999 lines
27 KiB
C
999 lines
27 KiB
C
/******************************************************************************
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*
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* Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
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* parents and siblings and Scope manipulation
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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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/acnamesp.h>
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#include <acpi/amlcode.h>
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#include <acpi/actables.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsutils")
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/* Local prototypes */
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static u8 acpi_ns_valid_path_separator(char sep);
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_report_error
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*
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* PARAMETERS: module_name - Caller's module name (for error output)
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* line_number - Caller's line number (for error output)
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* component_id - Caller's component ID (for error output)
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* internal_name - Name or path of the namespace node
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* lookup_status - Exception code from NS lookup
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*
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* RETURN: None
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*
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* DESCRIPTION: Print warning message with full pathname
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*
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******************************************************************************/
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void
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acpi_ns_report_error(char *module_name,
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u32 line_number,
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u32 component_id,
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char *internal_name, acpi_status lookup_status)
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{
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acpi_status status;
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char *name = NULL;
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acpi_os_printf("%8s-%04d: *** Error: Looking up ",
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module_name, line_number);
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if (lookup_status == AE_BAD_CHARACTER) {
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/* There is a non-ascii character in the name */
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acpi_os_printf("[0x%4.4X] (NON-ASCII)\n",
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*(ACPI_CAST_PTR(u32, internal_name)));
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} else {
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/* Convert path to external format */
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status = acpi_ns_externalize_name(ACPI_UINT32_MAX,
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internal_name, NULL, &name);
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/* Print target name */
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if (ACPI_SUCCESS(status)) {
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acpi_os_printf("[%s]", name);
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} else {
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acpi_os_printf("[COULD NOT EXTERNALIZE NAME]");
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}
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if (name) {
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ACPI_MEM_FREE(name);
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}
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}
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acpi_os_printf(" in namespace, %s\n",
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acpi_format_exception(lookup_status));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_report_method_error
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*
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* PARAMETERS: module_name - Caller's module name (for error output)
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* line_number - Caller's line number (for error output)
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* component_id - Caller's component ID (for error output)
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* Message - Error message to use on failure
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* prefix_node - Prefix relative to the path
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* Path - Path to the node
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* method_status - Execution status
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*
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* RETURN: None
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*
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* DESCRIPTION: Print warning message with full pathname
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*
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******************************************************************************/
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void
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acpi_ns_report_method_error(char *module_name,
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u32 line_number,
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u32 component_id,
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char *message,
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struct acpi_namespace_node *prefix_node,
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char *path, acpi_status method_status)
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{
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acpi_status status;
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struct acpi_namespace_node *node = prefix_node;
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if (path) {
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status = acpi_ns_get_node_by_path(path, prefix_node,
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ACPI_NS_NO_UPSEARCH, &node);
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if (ACPI_FAILURE(status)) {
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acpi_os_printf
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("report_method_error: Could not get node\n");
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return;
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}
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}
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acpi_os_printf("%8s-%04d: *** Error: ", module_name, line_number);
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acpi_ns_print_node_pathname(node, message);
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acpi_os_printf(", %s\n", acpi_format_exception(method_status));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_print_node_pathname
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*
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* PARAMETERS: Node - Object
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* Message - Prefix message
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*
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* DESCRIPTION: Print an object's full namespace pathname
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* Manages allocation/freeing of a pathname buffer
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*
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******************************************************************************/
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void
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acpi_ns_print_node_pathname(struct acpi_namespace_node *node, char *message)
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{
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struct acpi_buffer buffer;
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acpi_status status;
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if (!node) {
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acpi_os_printf("[NULL NAME]");
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return;
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}
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/* Convert handle to full pathname and print it (with supplied message) */
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buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
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status = acpi_ns_handle_to_pathname(node, &buffer);
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if (ACPI_SUCCESS(status)) {
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if (message) {
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acpi_os_printf("%s ", message);
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}
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acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node);
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ACPI_MEM_FREE(buffer.pointer);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_valid_root_prefix
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*
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* PARAMETERS: Prefix - Character to be checked
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*
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* RETURN: TRUE if a valid prefix
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*
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* DESCRIPTION: Check if a character is a valid ACPI Root prefix
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*
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******************************************************************************/
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u8 acpi_ns_valid_root_prefix(char prefix)
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{
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return ((u8) (prefix == '\\'));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_valid_path_separator
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*
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* PARAMETERS: Sep - Character to be checked
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*
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* RETURN: TRUE if a valid path separator
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*
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* DESCRIPTION: Check if a character is a valid ACPI path separator
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*
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******************************************************************************/
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static u8 acpi_ns_valid_path_separator(char sep)
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{
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return ((u8) (sep == '.'));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_get_type
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*
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* PARAMETERS: Node - Parent Node to be examined
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*
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* RETURN: Type field from Node whose handle is passed
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*
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* DESCRIPTION: Return the type of a Namespace node
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*
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******************************************************************************/
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acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
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{
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ACPI_FUNCTION_TRACE("ns_get_type");
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if (!node) {
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ACPI_REPORT_WARNING(("ns_get_type: Null Node input pointer\n"));
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return_VALUE(ACPI_TYPE_ANY);
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}
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return_VALUE((acpi_object_type) node->type);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_local
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*
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* PARAMETERS: Type - A namespace object type
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*
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* RETURN: LOCAL if names must be found locally in objects of the
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* passed type, 0 if enclosing scopes should be searched
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*
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* DESCRIPTION: Returns scope rule for the given object type.
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*
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******************************************************************************/
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u32 acpi_ns_local(acpi_object_type type)
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{
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ACPI_FUNCTION_TRACE("ns_local");
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if (!acpi_ut_valid_object_type(type)) {
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/* Type code out of range */
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ACPI_REPORT_WARNING(("ns_local: Invalid Object Type\n"));
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return_VALUE(ACPI_NS_NORMAL);
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}
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return_VALUE((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_get_internal_name_length
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*
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* PARAMETERS: Info - Info struct initialized with the
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* external name pointer.
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*
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* RETURN: None
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*
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* DESCRIPTION: Calculate the length of the internal (AML) namestring
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* corresponding to the external (ASL) namestring.
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*
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******************************************************************************/
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void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
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{
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char *next_external_char;
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u32 i;
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ACPI_FUNCTION_ENTRY();
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next_external_char = info->external_name;
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info->num_carats = 0;
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info->num_segments = 0;
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info->fully_qualified = FALSE;
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/*
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* For the internal name, the required length is 4 bytes per segment, plus
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* 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null
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* (which is not really needed, but no there's harm in putting it there)
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*
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* strlen() + 1 covers the first name_seg, which has no path separator
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*/
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if (acpi_ns_valid_root_prefix(next_external_char[0])) {
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info->fully_qualified = TRUE;
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next_external_char++;
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} else {
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/*
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* Handle Carat prefixes
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*/
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while (*next_external_char == '^') {
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info->num_carats++;
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next_external_char++;
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}
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}
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/*
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* Determine the number of ACPI name "segments" by counting the number of
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* path separators within the string. Start with one segment since the
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* segment count is [(# separators) + 1], and zero separators is ok.
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*/
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if (*next_external_char) {
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info->num_segments = 1;
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for (i = 0; next_external_char[i]; i++) {
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if (acpi_ns_valid_path_separator(next_external_char[i])) {
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info->num_segments++;
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}
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}
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}
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info->length = (ACPI_NAME_SIZE * info->num_segments) +
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4 + info->num_carats;
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info->next_external_char = next_external_char;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_build_internal_name
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*
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* PARAMETERS: Info - Info struct fully initialized
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*
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* RETURN: Status
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*
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* DESCRIPTION: Construct the internal (AML) namestring
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* corresponding to the external (ASL) namestring.
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*
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******************************************************************************/
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acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
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{
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u32 num_segments = info->num_segments;
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char *internal_name = info->internal_name;
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char *external_name = info->next_external_char;
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char *result = NULL;
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acpi_native_uint i;
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ACPI_FUNCTION_TRACE("ns_build_internal_name");
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/* Setup the correct prefixes, counts, and pointers */
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if (info->fully_qualified) {
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internal_name[0] = '\\';
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if (num_segments <= 1) {
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result = &internal_name[1];
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} else if (num_segments == 2) {
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internal_name[1] = AML_DUAL_NAME_PREFIX;
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result = &internal_name[2];
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} else {
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internal_name[1] = AML_MULTI_NAME_PREFIX_OP;
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internal_name[2] = (char)num_segments;
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result = &internal_name[3];
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}
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} else {
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/*
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* Not fully qualified.
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* Handle Carats first, then append the name segments
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*/
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i = 0;
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if (info->num_carats) {
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for (i = 0; i < info->num_carats; i++) {
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internal_name[i] = '^';
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}
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}
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if (num_segments <= 1) {
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result = &internal_name[i];
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} else if (num_segments == 2) {
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internal_name[i] = AML_DUAL_NAME_PREFIX;
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result = &internal_name[(acpi_native_uint) (i + 1)];
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} else {
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internal_name[i] = AML_MULTI_NAME_PREFIX_OP;
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internal_name[(acpi_native_uint) (i + 1)] =
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(char)num_segments;
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result = &internal_name[(acpi_native_uint) (i + 2)];
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}
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}
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/* Build the name (minus path separators) */
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for (; num_segments; num_segments--) {
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for (i = 0; i < ACPI_NAME_SIZE; i++) {
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if (acpi_ns_valid_path_separator(*external_name) ||
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(*external_name == 0)) {
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/* Pad the segment with underscore(s) if segment is short */
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result[i] = '_';
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} else {
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/* Convert the character to uppercase and save it */
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result[i] =
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(char)ACPI_TOUPPER((int)*external_name);
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external_name++;
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}
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}
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/* Now we must have a path separator, or the pathname is bad */
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if (!acpi_ns_valid_path_separator(*external_name) &&
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(*external_name != 0)) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Move on the next segment */
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external_name++;
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result += ACPI_NAME_SIZE;
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}
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/* Terminate the string */
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*result = 0;
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if (info->fully_qualified) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Returning [%p] (abs) \"\\%s\"\n",
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internal_name, internal_name));
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
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internal_name, internal_name));
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_internalize_name
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*
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* PARAMETERS: *external_name - External representation of name
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* **Converted Name - Where to return the resulting
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* internal represention of the name
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
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* to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
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*
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*******************************************************************************/
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acpi_status acpi_ns_internalize_name(char *external_name, char **converted_name)
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{
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char *internal_name;
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struct acpi_namestring_info info;
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acpi_status status;
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ACPI_FUNCTION_TRACE("ns_internalize_name");
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if ((!external_name) || (*external_name == 0) || (!converted_name)) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Get the length of the new internal name */
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info.external_name = external_name;
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acpi_ns_get_internal_name_length(&info);
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/* We need a segment to store the internal name */
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internal_name = ACPI_MEM_CALLOCATE(info.length);
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if (!internal_name) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Build the name */
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info.internal_name = internal_name;
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status = acpi_ns_build_internal_name(&info);
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if (ACPI_FAILURE(status)) {
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ACPI_MEM_FREE(internal_name);
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return_ACPI_STATUS(status);
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}
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*converted_name = internal_name;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_externalize_name
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*
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* PARAMETERS: internal_name_length - Lenth of the internal name below
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* internal_name - Internal representation of name
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* converted_name_length - Where the length is returned
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* converted_name - Where the resulting external name
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* is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
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* to its external (printable) form (e.g. "\_PR_.CPU0")
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*
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******************************************************************************/
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acpi_status
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acpi_ns_externalize_name(u32 internal_name_length,
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char *internal_name,
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u32 * converted_name_length, char **converted_name)
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{
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acpi_native_uint names_index = 0;
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acpi_native_uint num_segments = 0;
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acpi_native_uint required_length;
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acpi_native_uint prefix_length = 0;
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acpi_native_uint i = 0;
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acpi_native_uint j = 0;
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ACPI_FUNCTION_TRACE("ns_externalize_name");
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if (!internal_name_length || !internal_name || !converted_name) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Check for a prefix (one '\' | one or more '^').
|
|
*/
|
|
switch (internal_name[0]) {
|
|
case '\\':
|
|
prefix_length = 1;
|
|
break;
|
|
|
|
case '^':
|
|
for (i = 0; i < internal_name_length; i++) {
|
|
if (internal_name[i] == '^') {
|
|
prefix_length = i + 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == internal_name_length) {
|
|
prefix_length = i;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check for object names. Note that there could be 0-255 of these
|
|
* 4-byte elements.
|
|
*/
|
|
if (prefix_length < internal_name_length) {
|
|
switch (internal_name[prefix_length]) {
|
|
case AML_MULTI_NAME_PREFIX_OP:
|
|
|
|
/* <count> 4-byte names */
|
|
|
|
names_index = prefix_length + 2;
|
|
num_segments = (acpi_native_uint) (u8)
|
|
internal_name[(acpi_native_uint)
|
|
(prefix_length + 1)];
|
|
break;
|
|
|
|
case AML_DUAL_NAME_PREFIX:
|
|
|
|
/* Two 4-byte names */
|
|
|
|
names_index = prefix_length + 1;
|
|
num_segments = 2;
|
|
break;
|
|
|
|
case 0:
|
|
|
|
/* null_name */
|
|
|
|
names_index = 0;
|
|
num_segments = 0;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* one 4-byte name */
|
|
|
|
names_index = prefix_length;
|
|
num_segments = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate the length of converted_name, which equals the length
|
|
* of the prefix, length of all object names, length of any required
|
|
* punctuation ('.') between object names, plus the NULL terminator.
|
|
*/
|
|
required_length = prefix_length + (4 * num_segments) +
|
|
((num_segments > 0) ? (num_segments - 1) : 0) + 1;
|
|
|
|
/*
|
|
* Check to see if we're still in bounds. If not, there's a problem
|
|
* with internal_name (invalid format).
|
|
*/
|
|
if (required_length > internal_name_length) {
|
|
ACPI_REPORT_ERROR(("ns_externalize_name: Invalid internal name\n"));
|
|
return_ACPI_STATUS(AE_BAD_PATHNAME);
|
|
}
|
|
|
|
/*
|
|
* Build converted_name
|
|
*/
|
|
*converted_name = ACPI_MEM_CALLOCATE(required_length);
|
|
if (!(*converted_name)) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
j = 0;
|
|
|
|
for (i = 0; i < prefix_length; i++) {
|
|
(*converted_name)[j++] = internal_name[i];
|
|
}
|
|
|
|
if (num_segments > 0) {
|
|
for (i = 0; i < num_segments; i++) {
|
|
if (i > 0) {
|
|
(*converted_name)[j++] = '.';
|
|
}
|
|
|
|
(*converted_name)[j++] = internal_name[names_index++];
|
|
(*converted_name)[j++] = internal_name[names_index++];
|
|
(*converted_name)[j++] = internal_name[names_index++];
|
|
(*converted_name)[j++] = internal_name[names_index++];
|
|
}
|
|
}
|
|
|
|
if (converted_name_length) {
|
|
*converted_name_length = (u32) required_length;
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_map_handle_to_node
|
|
*
|
|
* PARAMETERS: Handle - Handle to be converted to an Node
|
|
*
|
|
* RETURN: A Name table entry pointer
|
|
*
|
|
* DESCRIPTION: Convert a namespace handle to a real Node
|
|
*
|
|
* Note: Real integer handles would allow for more verification
|
|
* and keep all pointers within this subsystem - however this introduces
|
|
* more (and perhaps unnecessary) overhead.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_namespace_node *acpi_ns_map_handle_to_node(acpi_handle handle)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/*
|
|
* Simple implementation.
|
|
*/
|
|
if (!handle) {
|
|
return (NULL);
|
|
}
|
|
|
|
if (handle == ACPI_ROOT_OBJECT) {
|
|
return (acpi_gbl_root_node);
|
|
}
|
|
|
|
/* We can at least attempt to verify the handle */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) {
|
|
return (NULL);
|
|
}
|
|
|
|
return ((struct acpi_namespace_node *)handle);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_convert_entry_to_handle
|
|
*
|
|
* PARAMETERS: Node - Node to be converted to a Handle
|
|
*
|
|
* RETURN: A user handle
|
|
*
|
|
* DESCRIPTION: Convert a real Node to a namespace handle
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_handle acpi_ns_convert_entry_to_handle(struct acpi_namespace_node *node)
|
|
{
|
|
|
|
/*
|
|
* Simple implementation for now;
|
|
*/
|
|
return ((acpi_handle) node);
|
|
|
|
/* Example future implementation ---------------------
|
|
|
|
if (!Node)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
if (Node == acpi_gbl_root_node)
|
|
{
|
|
return (ACPI_ROOT_OBJECT);
|
|
}
|
|
|
|
return ((acpi_handle) Node);
|
|
------------------------------------------------------*/
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_terminate
|
|
*
|
|
* PARAMETERS: none
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: free memory allocated for namespace and ACPI table storage.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ns_terminate(void)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
|
|
ACPI_FUNCTION_TRACE("ns_terminate");
|
|
|
|
/*
|
|
* 1) Free the entire namespace -- all nodes and objects
|
|
*
|
|
* Delete all object descriptors attached to namepsace nodes
|
|
*/
|
|
acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);
|
|
|
|
/* Detach any objects attached to the root */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node);
|
|
if (obj_desc) {
|
|
acpi_ns_detach_object(acpi_gbl_root_node);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n"));
|
|
|
|
/*
|
|
* 2) Now we can delete the ACPI tables
|
|
*/
|
|
acpi_tb_delete_all_tables();
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_opens_scope
|
|
*
|
|
* PARAMETERS: Type - A valid namespace type
|
|
*
|
|
* RETURN: NEWSCOPE if the passed type "opens a name scope" according
|
|
* to the ACPI specification, else 0
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32 acpi_ns_opens_scope(acpi_object_type type)
|
|
{
|
|
ACPI_FUNCTION_TRACE_STR("ns_opens_scope", acpi_ut_get_type_name(type));
|
|
|
|
if (!acpi_ut_valid_object_type(type)) {
|
|
/* type code out of range */
|
|
|
|
ACPI_REPORT_WARNING(("ns_opens_scope: Invalid Object Type %X\n",
|
|
type));
|
|
return_VALUE(ACPI_NS_NORMAL);
|
|
}
|
|
|
|
return_VALUE(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_get_node_by_path
|
|
*
|
|
* PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
|
|
* \ (backslash) and ^ (carat) prefixes, and the
|
|
* . (period) to separate segments are supported.
|
|
* start_node - Root of subtree to be searched, or NS_ALL for the
|
|
* root of the name space. If Name is fully
|
|
* qualified (first s8 is '\'), the passed value
|
|
* of Scope will not be accessed.
|
|
* Flags - Used to indicate whether to perform upsearch or
|
|
* not.
|
|
* return_node - Where the Node is returned
|
|
*
|
|
* DESCRIPTION: Look up a name relative to a given scope and return the
|
|
* corresponding Node. NOTE: Scope can be null.
|
|
*
|
|
* MUTEX: Locks namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_get_node_by_path(char *pathname,
|
|
struct acpi_namespace_node *start_node,
|
|
u32 flags, struct acpi_namespace_node **return_node)
|
|
{
|
|
union acpi_generic_state scope_info;
|
|
acpi_status status;
|
|
char *internal_path = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR("ns_get_node_by_path", pathname);
|
|
|
|
if (pathname) {
|
|
/* Convert path to internal representation */
|
|
|
|
status = acpi_ns_internalize_name(pathname, &internal_path);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
/* Must lock namespace during lookup */
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Setup lookup scope (search starting point) */
|
|
|
|
scope_info.scope.node = start_node;
|
|
|
|
/* Lookup the name in the namespace */
|
|
|
|
status = acpi_ns_lookup(&scope_info, internal_path,
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
(flags | ACPI_NS_DONT_OPEN_SCOPE),
|
|
NULL, return_node);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s, %s\n",
|
|
internal_path,
|
|
acpi_format_exception(status)));
|
|
}
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
|
|
cleanup:
|
|
if (internal_path) {
|
|
ACPI_MEM_FREE(internal_path);
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_get_parent_node
|
|
*
|
|
* PARAMETERS: Node - Current table entry
|
|
*
|
|
* RETURN: Parent entry of the given entry
|
|
*
|
|
* DESCRIPTION: Obtain the parent entry for a given entry in the namespace.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_namespace_node *acpi_ns_get_parent_node(struct acpi_namespace_node
|
|
*node)
|
|
{
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
if (!node) {
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Walk to the end of this peer list. The last entry is marked with a flag
|
|
* and the peer pointer is really a pointer back to the parent. This saves
|
|
* putting a parent back pointer in each and every named object!
|
|
*/
|
|
while (!(node->flags & ANOBJ_END_OF_PEER_LIST)) {
|
|
node = node->peer;
|
|
}
|
|
|
|
return (node->peer);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_get_next_valid_node
|
|
*
|
|
* PARAMETERS: Node - Current table entry
|
|
*
|
|
* RETURN: Next valid Node in the linked node list. NULL if no more valid
|
|
* nodes.
|
|
*
|
|
* DESCRIPTION: Find the next valid node within a name table.
|
|
* Useful for implementing NULL-end-of-list loops.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_namespace_node *acpi_ns_get_next_valid_node(struct
|
|
acpi_namespace_node
|
|
*node)
|
|
{
|
|
|
|
/* If we are at the end of this peer list, return NULL */
|
|
|
|
if (node->flags & ANOBJ_END_OF_PEER_LIST) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Otherwise just return the next peer */
|
|
|
|
return (node->peer);
|
|
}
|
|
|
|
#ifdef ACPI_OBSOLETE_FUNCTIONS
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_find_parent_name
|
|
*
|
|
* PARAMETERS: *child_node - Named Obj whose name is to be found
|
|
*
|
|
* RETURN: The ACPI name
|
|
*
|
|
* DESCRIPTION: Search for the given obj in its parent scope and return the
|
|
* name segment, or "????" if the parent name can't be found
|
|
* (which "should not happen").
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node * child_node)
|
|
{
|
|
struct acpi_namespace_node *parent_node;
|
|
|
|
ACPI_FUNCTION_TRACE("ns_find_parent_name");
|
|
|
|
if (child_node) {
|
|
/* Valid entry. Get the parent Node */
|
|
|
|
parent_node = acpi_ns_get_parent_node(child_node);
|
|
if (parent_node) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Parent of %p [%4.4s] is %p [%4.4s]\n",
|
|
child_node,
|
|
acpi_ut_get_node_name(child_node),
|
|
parent_node,
|
|
acpi_ut_get_node_name(parent_node)));
|
|
|
|
if (parent_node->name.integer) {
|
|
return_VALUE((acpi_name) parent_node->name.
|
|
integer);
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Unable to find parent of %p (%4.4s)\n",
|
|
child_node,
|
|
acpi_ut_get_node_name(child_node)));
|
|
}
|
|
|
|
return_VALUE(ACPI_UNKNOWN_NAME);
|
|
}
|
|
#endif
|