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Diffstat (limited to 'drivers/acpi/namespace/nssearch.c')
| -rw-r--r-- | drivers/acpi/namespace/nssearch.c | 415 |
1 files changed, 0 insertions, 415 deletions
diff --git a/drivers/acpi/namespace/nssearch.c b/drivers/acpi/namespace/nssearch.c deleted file mode 100644 index a76c731e3ba..00000000000 --- a/drivers/acpi/namespace/nssearch.c +++ /dev/null @@ -1,415 +0,0 @@ -/******************************************************************************* - * - * Module Name: nssearch - Namespace search - * - ******************************************************************************/ - -/* - * 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("nssearch") - -/* Local prototypes */ -static acpi_status -acpi_ns_search_parent_tree(u32 target_name, - struct acpi_namespace_node *node, - acpi_object_type type, - struct acpi_namespace_node **return_node); - -/******************************************************************************* - * - * FUNCTION: acpi_ns_search_one_scope - * - * PARAMETERS: target_name - Ascii ACPI name to search for - * parent_node - Starting node where search will begin - * Type - Object type to match - * return_node - Where the matched Named obj is returned - * - * RETURN: Status - * - * DESCRIPTION: Search a single level of the namespace. Performs a - * simple search of the specified level, and does not add - * entries or search parents. - * - * - * Named object lists are built (and subsequently dumped) in the - * order in which the names are encountered during the namespace load; - * - * All namespace searching is linear in this implementation, but - * could be easily modified to support any improved search - * algorithm. However, the linear search was chosen for simplicity - * and because the trees are small and the other interpreter - * execution overhead is relatively high. - * - * Note: CPU execution analysis has shown that the AML interpreter spends - * a very small percentage of its time searching the namespace. Therefore, - * the linear search seems to be sufficient, as there would seem to be - * little value in improving the search. - * - ******************************************************************************/ - -acpi_status -acpi_ns_search_one_scope(u32 target_name, - struct acpi_namespace_node *parent_node, - acpi_object_type type, - struct acpi_namespace_node **return_node) -{ - struct acpi_namespace_node *node; - - ACPI_FUNCTION_TRACE(ns_search_one_scope); - -#ifdef ACPI_DEBUG_OUTPUT - if (ACPI_LV_NAMES & acpi_dbg_level) { - char *scope_name; - - scope_name = acpi_ns_get_external_pathname(parent_node); - if (scope_name) { - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "Searching %s (%p) For [%4.4s] (%s)\n", - scope_name, parent_node, - ACPI_CAST_PTR(char, &target_name), - acpi_ut_get_type_name(type))); - - ACPI_FREE(scope_name); - } - } -#endif - - /* - * Search for name at this namespace level, which is to say that we - * must search for the name among the children of this object - */ - node = parent_node->child; - while (node) { - - /* Check for match against the name */ - - if (node->name.integer == target_name) { - - /* Resolve a control method alias if any */ - - if (acpi_ns_get_type(node) == - ACPI_TYPE_LOCAL_METHOD_ALIAS) { - node = - ACPI_CAST_PTR(struct acpi_namespace_node, - node->object); - } - - /* Found matching entry */ - - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "Name [%4.4s] (%s) %p found in scope [%4.4s] %p\n", - ACPI_CAST_PTR(char, &target_name), - acpi_ut_get_type_name(node->type), - node, - acpi_ut_get_node_name(parent_node), - parent_node)); - - *return_node = node; - return_ACPI_STATUS(AE_OK); - } - - /* - * The last entry in the list points back to the parent, - * so a flag is used to indicate the end-of-list - */ - if (node->flags & ANOBJ_END_OF_PEER_LIST) { - - /* Searched entire list, we are done */ - - break; - } - - /* Didn't match name, move on to the next peer object */ - - node = node->peer; - } - - /* Searched entire namespace level, not found */ - - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "Name [%4.4s] (%s) not found in search in scope [%4.4s] %p first child %p\n", - ACPI_CAST_PTR(char, &target_name), - acpi_ut_get_type_name(type), - acpi_ut_get_node_name(parent_node), parent_node, - parent_node->child)); - - return_ACPI_STATUS(AE_NOT_FOUND); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_search_parent_tree - * - * PARAMETERS: target_name - Ascii ACPI name to search for - * Node - Starting node where search will begin - * Type - Object type to match - * return_node - Where the matched Node is returned - * - * RETURN: Status - * - * DESCRIPTION: Called when a name has not been found in the current namespace - * level. Before adding it or giving up, ACPI scope rules require - * searching enclosing scopes in cases identified by acpi_ns_local(). - * - * "A name is located by finding the matching name in the current - * name space, and then in the parent name space. If the parent - * name space does not contain the name, the search continues - * recursively until either the name is found or the name space - * does not have a parent (the root of the name space). This - * indicates that the name is not found" (From ACPI Specification, - * section 5.3) - * - ******************************************************************************/ - -static acpi_status -acpi_ns_search_parent_tree(u32 target_name, - struct acpi_namespace_node *node, - acpi_object_type type, - struct acpi_namespace_node **return_node) -{ - acpi_status status; - struct acpi_namespace_node *parent_node; - - ACPI_FUNCTION_TRACE(ns_search_parent_tree); - - parent_node = acpi_ns_get_parent_node(node); - - /* - * If there is no parent (i.e., we are at the root) or type is "local", - * we won't be searching the parent tree. - */ - if (!parent_node) { - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "[%4.4s] has no parent\n", - ACPI_CAST_PTR(char, &target_name))); - return_ACPI_STATUS(AE_NOT_FOUND); - } - - if (acpi_ns_local(type)) { - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "[%4.4s] type [%s] must be local to this scope (no parent search)\n", - ACPI_CAST_PTR(char, &target_name), - acpi_ut_get_type_name(type))); - return_ACPI_STATUS(AE_NOT_FOUND); - } - - /* Search the parent tree */ - - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "Searching parent [%4.4s] for [%4.4s]\n", - acpi_ut_get_node_name(parent_node), - ACPI_CAST_PTR(char, &target_name))); - - /* - * Search parents until target is found or we have backed up to the root - */ - while (parent_node) { - /* - * Search parent scope. Use TYPE_ANY because we don't care about the - * object type at this point, we only care about the existence of - * the actual name we are searching for. Typechecking comes later. - */ - status = - acpi_ns_search_one_scope(target_name, parent_node, - ACPI_TYPE_ANY, return_node); - if (ACPI_SUCCESS(status)) { - return_ACPI_STATUS(status); - } - - /* Not found here, go up another level (until we reach the root) */ - - parent_node = acpi_ns_get_parent_node(parent_node); - } - - /* Not found in parent tree */ - - return_ACPI_STATUS(AE_NOT_FOUND); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_search_and_enter - * - * PARAMETERS: target_name - Ascii ACPI name to search for (4 chars) - * walk_state - Current state of the walk - * Node - Starting node where search will begin - * interpreter_mode - Add names only in ACPI_MODE_LOAD_PASS_x. - * Otherwise,search only. - * Type - Object type to match - * Flags - Flags describing the search restrictions - * return_node - Where the Node is returned - * - * RETURN: Status - * - * DESCRIPTION: Search for a name segment in a single namespace level, - * optionally adding it if it is not found. If the passed - * Type is not Any and the type previously stored in the - * entry was Any (i.e. unknown), update the stored type. - * - * In ACPI_IMODE_EXECUTE, search only. - * In other modes, search and add if not found. - * - ******************************************************************************/ - -acpi_status -acpi_ns_search_and_enter(u32 target_name, - struct acpi_walk_state *walk_state, - struct acpi_namespace_node *node, - acpi_interpreter_mode interpreter_mode, - acpi_object_type type, - u32 flags, struct acpi_namespace_node **return_node) -{ - acpi_status status; - struct acpi_namespace_node *new_node; - - ACPI_FUNCTION_TRACE(ns_search_and_enter); - - /* Parameter validation */ - - if (!node || !target_name || !return_node) { - ACPI_ERROR((AE_INFO, - "Null parameter: Node %p Name %X ReturnNode %p", - node, target_name, return_node)); - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* - * Name must consist of valid ACPI characters. We will repair the name if - * necessary because we don't want to abort because of this, but we want - * all namespace names to be printable. A warning message is appropriate. - * - * This issue came up because there are in fact machines that exhibit - * this problem, and we want to be able to enable ACPI support for them, - * even though there are a few bad names. - */ - if (!acpi_ut_valid_acpi_name(target_name)) { - target_name = - acpi_ut_repair_name(ACPI_CAST_PTR(char, &target_name)); - - /* Report warning only if in strict mode or debug mode */ - - if (!acpi_gbl_enable_interpreter_slack) { - ACPI_WARNING((AE_INFO, - "Found bad character(s) in name, repaired: [%4.4s]\n", - ACPI_CAST_PTR(char, &target_name))); - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Found bad character(s) in name, repaired: [%4.4s]\n", - ACPI_CAST_PTR(char, &target_name))); - } - } - - /* Try to find the name in the namespace level specified by the caller */ - - *return_node = ACPI_ENTRY_NOT_FOUND; - status = acpi_ns_search_one_scope(target_name, node, type, return_node); - if (status != AE_NOT_FOUND) { - /* - * If we found it AND the request specifies that a find is an error, - * return the error - */ - if ((status == AE_OK) && (flags & ACPI_NS_ERROR_IF_FOUND)) { - status = AE_ALREADY_EXISTS; - } - - /* Either found it or there was an error: finished either way */ - - return_ACPI_STATUS(status); - } - - /* - * The name was not found. If we are NOT performing the first pass - * (name entry) of loading the namespace, search the parent tree (all the - * way to the root if necessary.) We don't want to perform the parent - * search when the namespace is actually being loaded. We want to perform - * the search when namespace references are being resolved (load pass 2) - * and during the execution phase. - */ - if ((interpreter_mode != ACPI_IMODE_LOAD_PASS1) && - (flags & ACPI_NS_SEARCH_PARENT)) { - /* - * Not found at this level - search parent tree according to the - * ACPI specification - */ - status = - acpi_ns_search_parent_tree(target_name, node, type, - return_node); - if (ACPI_SUCCESS(status)) { - return_ACPI_STATUS(status); - } - } - - /* In execute mode, just search, never add names. Exit now */ - - if (interpreter_mode == ACPI_IMODE_EXECUTE) { - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "%4.4s Not found in %p [Not adding]\n", - ACPI_CAST_PTR(char, &target_name), node)); - - return_ACPI_STATUS(AE_NOT_FOUND); - } - - /* Create the new named object */ - - new_node = acpi_ns_create_node(target_name); - if (!new_node) { - return_ACPI_STATUS(AE_NO_MEMORY); - } -#ifdef ACPI_ASL_COMPILER - /* - * Node is an object defined by an External() statement - */ - if (flags & ACPI_NS_EXTERNAL) { - new_node->flags |= ANOBJ_IS_EXTERNAL; - } -#endif - - if (flags & ACPI_NS_TEMPORARY) { - new_node->flags |= ANOBJ_TEMPORARY; - } - - /* Install the new object into the parent's list of children */ - - acpi_ns_install_node(walk_state, node, new_node, type); - *return_node = new_node; - return_ACPI_STATUS(AE_OK); -} |