diff options
Diffstat (limited to 'drivers/acpi/namespace')
| -rw-r--r-- | drivers/acpi/namespace/Makefile | 12 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsaccess.c | 674 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsalloc.c | 496 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsdump.c | 708 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsdumpdv.c | 140 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nseval.c | 319 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsinit.c | 592 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsload.c | 314 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsnames.c | 264 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsobject.c | 440 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsparse.c | 203 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nspredef.c | 900 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nssearch.c | 414 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsutils.c | 996 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nswalk.c | 295 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsxfeval.c | 811 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsxfname.c | 359 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsxfobj.c | 286 |
18 files changed, 8223 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/Makefile b/drivers/acpi/namespace/Makefile new file mode 100644 index 0000000..371a2da --- /dev/null +++ b/drivers/acpi/namespace/Makefile @@ -0,0 +1,12 @@ +# +# Makefile for all Linux ACPI interpreter subdirectories +# + +obj-y := nsaccess.o nsload.o nssearch.o nsxfeval.o \ + nsalloc.o nseval.o nsnames.o nsutils.o nsxfname.o \ + nsdump.o nsinit.o nsobject.o nswalk.o nsxfobj.o \ + nsparse.o nspredef.o + +obj-$(ACPI_FUTURE_USAGE) += nsdumpdv.o + +EXTRA_CFLAGS += $(ACPI_CFLAGS) diff --git a/drivers/acpi/namespace/nsaccess.c b/drivers/acpi/namespace/nsaccess.c new file mode 100644 index 0000000..c39a7f6 --- /dev/null +++ b/drivers/acpi/namespace/nsaccess.c @@ -0,0 +1,674 @@ +/******************************************************************************* + * + * Module Name: nsaccess - Top-level functions for accessing ACPI namespace + * + ******************************************************************************/ + +/* + * 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/amlcode.h> +#include <acpi/acnamesp.h> +#include <acpi/acdispat.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsaccess") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_root_initialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Allocate and initialize the default root named objects + * + * MUTEX: Locks namespace for entire execution + * + ******************************************************************************/ +acpi_status acpi_ns_root_initialize(void) +{ + acpi_status status; + const struct acpi_predefined_names *init_val = NULL; + struct acpi_namespace_node *new_node; + union acpi_operand_object *obj_desc; + acpi_string val = NULL; + + ACPI_FUNCTION_TRACE(ns_root_initialize); + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * The global root ptr is initially NULL, so a non-NULL value indicates + * that acpi_ns_root_initialize() has already been called; just return. + */ + if (acpi_gbl_root_node) { + status = AE_OK; + goto unlock_and_exit; + } + + /* + * Tell the rest of the subsystem that the root is initialized + * (This is OK because the namespace is locked) + */ + acpi_gbl_root_node = &acpi_gbl_root_node_struct; + + /* Enter the pre-defined names in the name table */ + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Entering predefined entries into namespace\n")); + + for (init_val = acpi_gbl_pre_defined_names; init_val->name; init_val++) { + + /* _OSI is optional for now, will be permanent later */ + + if (!ACPI_STRCMP(init_val->name, "_OSI") + && !acpi_gbl_create_osi_method) { + continue; + } + + status = acpi_ns_lookup(NULL, init_val->name, init_val->type, + ACPI_IMODE_LOAD_PASS2, + ACPI_NS_NO_UPSEARCH, NULL, &new_node); + + if (ACPI_FAILURE(status) || (!new_node)) { /* Must be on same line for code converter */ + ACPI_EXCEPTION((AE_INFO, status, + "Could not create predefined name %s", + init_val->name)); + } + + /* + * Name entered successfully. + * If entry in pre_defined_names[] specifies an + * initial value, create the initial value. + */ + if (init_val->val) { + status = acpi_os_predefined_override(init_val, &val); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, + "Could not override predefined %s", + init_val->name)); + } + + if (!val) { + val = init_val->val; + } + + /* + * Entry requests an initial value, allocate a + * descriptor for it. + */ + obj_desc = + acpi_ut_create_internal_object(init_val->type); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto unlock_and_exit; + } + + /* + * Convert value string from table entry to + * internal representation. Only types actually + * used for initial values are implemented here. + */ + switch (init_val->type) { + case ACPI_TYPE_METHOD: + obj_desc->method.param_count = + (u8) ACPI_TO_INTEGER(val); + obj_desc->common.flags |= AOPOBJ_DATA_VALID; + +#if defined (ACPI_ASL_COMPILER) + + /* Save the parameter count for the i_aSL compiler */ + + new_node->value = obj_desc->method.param_count; +#else + /* Mark this as a very SPECIAL method */ + + obj_desc->method.method_flags = + AML_METHOD_INTERNAL_ONLY; + +#ifndef ACPI_DUMP_APP + obj_desc->method.implementation = + acpi_ut_osi_implementation; +#endif +#endif + break; + + case ACPI_TYPE_INTEGER: + + obj_desc->integer.value = ACPI_TO_INTEGER(val); + break; + + case ACPI_TYPE_STRING: + + /* + * Build an object around the static string + */ + obj_desc->string.length = + (u32) ACPI_STRLEN(val); + obj_desc->string.pointer = val; + obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; + break; + + case ACPI_TYPE_MUTEX: + + obj_desc->mutex.node = new_node; + obj_desc->mutex.sync_level = + (u8) (ACPI_TO_INTEGER(val) - 1); + + /* Create a mutex */ + + status = + acpi_os_create_mutex(&obj_desc->mutex. + os_mutex); + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(obj_desc); + goto unlock_and_exit; + } + + /* Special case for ACPI Global Lock */ + + if (ACPI_STRCMP(init_val->name, "_GL_") == 0) { + acpi_gbl_global_lock_mutex = obj_desc; + + /* Create additional counting semaphore for global lock */ + + status = + acpi_os_create_semaphore(1, 0, + &acpi_gbl_global_lock_semaphore); + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference + (obj_desc); + goto unlock_and_exit; + } + } + break; + + default: + + ACPI_ERROR((AE_INFO, + "Unsupported initial type value %X", + init_val->type)); + acpi_ut_remove_reference(obj_desc); + obj_desc = NULL; + continue; + } + + /* Store pointer to value descriptor in the Node */ + + status = acpi_ns_attach_object(new_node, obj_desc, + ACPI_GET_OBJECT_TYPE + (obj_desc)); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + } + } + + unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + /* Save a handle to "_GPE", it is always present */ + + if (ACPI_SUCCESS(status)) { + status = acpi_ns_get_node(NULL, "\\_GPE", ACPI_NS_NO_UPSEARCH, + &acpi_gbl_fadt_gpe_device); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_lookup + * + * PARAMETERS: scope_info - Current scope info block + * Pathname - Search pathname, in internal format + * (as represented in the AML stream) + * Type - Type associated with name + * interpreter_mode - IMODE_LOAD_PASS2 => add name if not found + * Flags - Flags describing the search restrictions + * walk_state - Current state of the walk + * return_node - Where the Node is placed (if found + * or created successfully) + * + * RETURN: Status + * + * DESCRIPTION: Find or enter the passed name in the name space. + * Log an error if name not found in Exec mode. + * + * MUTEX: Assumes namespace is locked. + * + ******************************************************************************/ + +acpi_status +acpi_ns_lookup(union acpi_generic_state *scope_info, + char *pathname, + acpi_object_type type, + acpi_interpreter_mode interpreter_mode, + u32 flags, + struct acpi_walk_state *walk_state, + struct acpi_namespace_node **return_node) +{ + acpi_status status; + char *path = pathname; + struct acpi_namespace_node *prefix_node; + struct acpi_namespace_node *current_node = NULL; + struct acpi_namespace_node *this_node = NULL; + u32 num_segments; + u32 num_carats; + acpi_name simple_name; + acpi_object_type type_to_check_for; + acpi_object_type this_search_type; + u32 search_parent_flag = ACPI_NS_SEARCH_PARENT; + u32 local_flags; + + ACPI_FUNCTION_TRACE(ns_lookup); + + if (!return_node) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + local_flags = flags & ~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_SEARCH_PARENT); + *return_node = ACPI_ENTRY_NOT_FOUND; + acpi_gbl_ns_lookup_count++; + + if (!acpi_gbl_root_node) { + return_ACPI_STATUS(AE_NO_NAMESPACE); + } + + /* + * Get the prefix scope. + * A null scope means use the root scope + */ + if ((!scope_info) || (!scope_info->scope.node)) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Null scope prefix, using root node (%p)\n", + acpi_gbl_root_node)); + + prefix_node = acpi_gbl_root_node; + } else { + prefix_node = scope_info->scope.node; + if (ACPI_GET_DESCRIPTOR_TYPE(prefix_node) != + ACPI_DESC_TYPE_NAMED) { + ACPI_ERROR((AE_INFO, "%p is not a namespace node [%s]", + prefix_node, + acpi_ut_get_descriptor_name(prefix_node))); + return_ACPI_STATUS(AE_AML_INTERNAL); + } + + if (!(flags & ACPI_NS_PREFIX_IS_SCOPE)) { + /* + * This node might not be a actual "scope" node (such as a + * Device/Method, etc.) It could be a Package or other object node. + * Backup up the tree to find the containing scope node. + */ + while (!acpi_ns_opens_scope(prefix_node->type) && + prefix_node->type != ACPI_TYPE_ANY) { + prefix_node = + acpi_ns_get_parent_node(prefix_node); + } + } + } + + /* Save type TBD: may be no longer necessary */ + + type_to_check_for = type; + + /* + * Begin examination of the actual pathname + */ + if (!pathname) { + + /* A Null name_path is allowed and refers to the root */ + + num_segments = 0; + this_node = acpi_gbl_root_node; + path = ""; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Null Pathname (Zero segments), Flags=%X\n", + flags)); + } else { + /* + * Name pointer is valid (and must be in internal name format) + * + * Check for scope prefixes: + * + * As represented in the AML stream, a namepath consists of an + * optional scope prefix followed by a name segment part. + * + * If present, the scope prefix is either a Root Prefix (in + * which case the name is fully qualified), or one or more + * Parent Prefixes (in which case the name's scope is relative + * to the current scope). + */ + if (*path == (u8) AML_ROOT_PREFIX) { + + /* Pathname is fully qualified, start from the root */ + + this_node = acpi_gbl_root_node; + search_parent_flag = ACPI_NS_NO_UPSEARCH; + + /* Point to name segment part */ + + path++; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Path is absolute from root [%p]\n", + this_node)); + } else { + /* Pathname is relative to current scope, start there */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Searching relative to prefix scope [%4.4s] (%p)\n", + acpi_ut_get_node_name(prefix_node), + prefix_node)); + + /* + * Handle multiple Parent Prefixes (carat) by just getting + * the parent node for each prefix instance. + */ + this_node = prefix_node; + num_carats = 0; + while (*path == (u8) AML_PARENT_PREFIX) { + + /* Name is fully qualified, no search rules apply */ + + search_parent_flag = ACPI_NS_NO_UPSEARCH; + /* + * Point past this prefix to the name segment + * part or the next Parent Prefix + */ + path++; + + /* Backup to the parent node */ + + num_carats++; + this_node = acpi_ns_get_parent_node(this_node); + if (!this_node) { + + /* Current scope has no parent scope */ + + ACPI_ERROR((AE_INFO, + "ACPI path has too many parent prefixes (^) - reached beyond root node")); + return_ACPI_STATUS(AE_NOT_FOUND); + } + } + + if (search_parent_flag == ACPI_NS_NO_UPSEARCH) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Search scope is [%4.4s], path has %d carat(s)\n", + acpi_ut_get_node_name + (this_node), num_carats)); + } + } + + /* + * Determine the number of ACPI name segments in this pathname. + * + * The segment part consists of either: + * - A Null name segment (0) + * - A dual_name_prefix followed by two 4-byte name segments + * - A multi_name_prefix followed by a byte indicating the + * number of segments and the segments themselves. + * - A single 4-byte name segment + * + * Examine the name prefix opcode, if any, to determine the number of + * segments. + */ + switch (*path) { + case 0: + /* + * Null name after a root or parent prefixes. We already + * have the correct target node and there are no name segments. + */ + num_segments = 0; + type = this_node->type; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Prefix-only Pathname (Zero name segments), Flags=%X\n", + flags)); + break; + + case AML_DUAL_NAME_PREFIX: + + /* More than one name_seg, search rules do not apply */ + + search_parent_flag = ACPI_NS_NO_UPSEARCH; + + /* Two segments, point to first name segment */ + + num_segments = 2; + path++; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Dual Pathname (2 segments, Flags=%X)\n", + flags)); + break; + + case AML_MULTI_NAME_PREFIX_OP: + + /* More than one name_seg, search rules do not apply */ + + search_parent_flag = ACPI_NS_NO_UPSEARCH; + + /* Extract segment count, point to first name segment */ + + path++; + num_segments = (u32) (u8) * path; + path++; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Multi Pathname (%d Segments, Flags=%X)\n", + num_segments, flags)); + break; + + default: + /* + * Not a Null name, no Dual or Multi prefix, hence there is + * only one name segment and Pathname is already pointing to it. + */ + num_segments = 1; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Simple Pathname (1 segment, Flags=%X)\n", + flags)); + break; + } + + ACPI_DEBUG_EXEC(acpi_ns_print_pathname(num_segments, path)); + } + + /* + * Search namespace for each segment of the name. Loop through and + * verify (or add to the namespace) each name segment. + * + * The object type is significant only at the last name + * segment. (We don't care about the types along the path, only + * the type of the final target object.) + */ + this_search_type = ACPI_TYPE_ANY; + current_node = this_node; + while (num_segments && current_node) { + num_segments--; + if (!num_segments) { + /* + * This is the last segment, enable typechecking + */ + this_search_type = type; + + /* + * Only allow automatic parent search (search rules) if the caller + * requested it AND we have a single, non-fully-qualified name_seg + */ + if ((search_parent_flag != ACPI_NS_NO_UPSEARCH) && + (flags & ACPI_NS_SEARCH_PARENT)) { + local_flags |= ACPI_NS_SEARCH_PARENT; + } + + /* Set error flag according to caller */ + + if (flags & ACPI_NS_ERROR_IF_FOUND) { + local_flags |= ACPI_NS_ERROR_IF_FOUND; + } + } + + /* Extract one ACPI name from the front of the pathname */ + + ACPI_MOVE_32_TO_32(&simple_name, path); + + /* Try to find the single (4 character) ACPI name */ + + status = + acpi_ns_search_and_enter(simple_name, walk_state, + current_node, interpreter_mode, + this_search_type, local_flags, + &this_node); + if (ACPI_FAILURE(status)) { + if (status == AE_NOT_FOUND) { + + /* Name not found in ACPI namespace */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Name [%4.4s] not found in scope [%4.4s] %p\n", + (char *)&simple_name, + (char *)¤t_node->name, + current_node)); + } + + *return_node = this_node; + return_ACPI_STATUS(status); + } + + /* More segments to follow? */ + + if (num_segments > 0) { + /* + * If we have an alias to an object that opens a scope (such as a + * device or processor), we need to dereference the alias here so that + * we can access any children of the original node (via the remaining + * segments). + */ + if (this_node->type == ACPI_TYPE_LOCAL_ALIAS) { + if (acpi_ns_opens_scope + (((struct acpi_namespace_node *)this_node-> + object)->type)) { + this_node = + (struct acpi_namespace_node *) + this_node->object; + } + } + } + + /* Special handling for the last segment (num_segments == 0) */ + + else { + /* + * Sanity typecheck of the target object: + * + * If 1) This is the last segment (num_segments == 0) + * 2) And we are looking for a specific type + * (Not checking for TYPE_ANY) + * 3) Which is not an alias + * 4) Which is not a local type (TYPE_SCOPE) + * 5) And the type of target object is known (not TYPE_ANY) + * 6) And target object does not match what we are looking for + * + * Then we have a type mismatch. Just warn and ignore it. + */ + if ((type_to_check_for != ACPI_TYPE_ANY) && + (type_to_check_for != ACPI_TYPE_LOCAL_ALIAS) && + (type_to_check_for != ACPI_TYPE_LOCAL_METHOD_ALIAS) + && (type_to_check_for != ACPI_TYPE_LOCAL_SCOPE) + && (this_node->type != ACPI_TYPE_ANY) + && (this_node->type != type_to_check_for)) { + + /* Complain about a type mismatch */ + + ACPI_WARNING((AE_INFO, + "NsLookup: Type mismatch on %4.4s (%s), searching for (%s)", + ACPI_CAST_PTR(char, &simple_name), + acpi_ut_get_type_name(this_node-> + type), + acpi_ut_get_type_name + (type_to_check_for))); + } + + /* + * If this is the last name segment and we are not looking for a + * specific type, but the type of found object is known, use that type + * to (later) see if it opens a scope. + */ + if (type == ACPI_TYPE_ANY) { + type = this_node->type; + } + } + + /* Point to next name segment and make this node current */ + + path += ACPI_NAME_SIZE; + current_node = this_node; + } + + /* + * Always check if we need to open a new scope + */ + if (!(flags & ACPI_NS_DONT_OPEN_SCOPE) && (walk_state)) { + /* + * If entry is a type which opens a scope, push the new scope on the + * scope stack. + */ + if (acpi_ns_opens_scope(type)) { + status = + acpi_ds_scope_stack_push(this_node, type, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } + + *return_node = this_node; + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c new file mode 100644 index 0000000..3a1740a --- /dev/null +++ b/drivers/acpi/namespace/nsalloc.c @@ -0,0 +1,496 @@ +/******************************************************************************* + * + * Module Name: nsalloc - Namespace allocation and deletion utilities + * + ******************************************************************************/ + +/* + * 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/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsalloc") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_create_node + * + * PARAMETERS: Name - Name of the new node (4 char ACPI name) + * + * RETURN: New namespace node (Null on failure) + * + * DESCRIPTION: Create a namespace node + * + ******************************************************************************/ +struct acpi_namespace_node *acpi_ns_create_node(u32 name) +{ + struct acpi_namespace_node *node; +#ifdef ACPI_DBG_TRACK_ALLOCATIONS + u32 temp; +#endif + + ACPI_FUNCTION_TRACE(ns_create_node); + + node = acpi_os_acquire_object(acpi_gbl_namespace_cache); + if (!node) { + return_PTR(NULL); + } + + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_allocated++); + +#ifdef ACPI_DBG_TRACK_ALLOCATIONS + temp = + acpi_gbl_ns_node_list->total_allocated - + acpi_gbl_ns_node_list->total_freed; + if (temp > acpi_gbl_ns_node_list->max_occupied) { + acpi_gbl_ns_node_list->max_occupied = temp; + } +#endif + + node->name.integer = name; + ACPI_SET_DESCRIPTOR_TYPE(node, ACPI_DESC_TYPE_NAMED); + return_PTR(node); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_delete_node + * + * PARAMETERS: Node - Node to be deleted + * + * RETURN: None + * + * DESCRIPTION: Delete a namespace node + * + ******************************************************************************/ + +void acpi_ns_delete_node(struct acpi_namespace_node *node) +{ + struct acpi_namespace_node *parent_node; + struct acpi_namespace_node *prev_node; + struct acpi_namespace_node *next_node; + + ACPI_FUNCTION_TRACE_PTR(ns_delete_node, node); + + parent_node = acpi_ns_get_parent_node(node); + + prev_node = NULL; + next_node = parent_node->child; + + /* Find the node that is the previous peer in the parent's child list */ + + while (next_node != node) { + prev_node = next_node; + next_node = prev_node->peer; + } + + if (prev_node) { + + /* Node is not first child, unlink it */ + + prev_node->peer = next_node->peer; + if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { + prev_node->flags |= ANOBJ_END_OF_PEER_LIST; + } + } else { + /* Node is first child (has no previous peer) */ + + if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { + + /* No peers at all */ + + parent_node->child = NULL; + } else { /* Link peer list to parent */ + + parent_node->child = next_node->peer; + } + } + + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); + + /* + * Detach an object if there is one, then delete the node + */ + acpi_ns_detach_object(node); + (void)acpi_os_release_object(acpi_gbl_namespace_cache, node); + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_install_node + * + * PARAMETERS: walk_state - Current state of the walk + * parent_node - The parent of the new Node + * Node - The new Node to install + * Type - ACPI object type of the new Node + * + * RETURN: None + * + * DESCRIPTION: Initialize a new namespace node and install it amongst + * its peers. + * + * Note: Current namespace lookup is linear search. This appears + * to be sufficient as namespace searches consume only a small + * fraction of the execution time of the ACPI subsystem. + * + ******************************************************************************/ + +void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namespace_node *parent_node, /* Parent */ + struct acpi_namespace_node *node, /* New Child */ + acpi_object_type type) +{ + acpi_owner_id owner_id = 0; + struct acpi_namespace_node *child_node; + + ACPI_FUNCTION_TRACE(ns_install_node); + + /* + * Get the owner ID from the Walk state + * The owner ID is used to track table deletion and + * deletion of objects created by methods + */ + if (walk_state) { + owner_id = walk_state->owner_id; + } + + /* Link the new entry into the parent and existing children */ + + child_node = parent_node->child; + if (!child_node) { + parent_node->child = node; + node->flags |= ANOBJ_END_OF_PEER_LIST; + node->peer = parent_node; + } else { + while (!(child_node->flags & ANOBJ_END_OF_PEER_LIST)) { + child_node = child_node->peer; + } + + child_node->peer = node; + + /* Clear end-of-list flag */ + + child_node->flags &= ~ANOBJ_END_OF_PEER_LIST; + node->flags |= ANOBJ_END_OF_PEER_LIST; + node->peer = parent_node; + } + + /* Init the new entry */ + + node->owner_id = owner_id; + node->type = (u8) type; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n", + acpi_ut_get_node_name(node), + acpi_ut_get_type_name(node->type), node, owner_id, + acpi_ut_get_node_name(parent_node), + acpi_ut_get_type_name(parent_node->type), + parent_node)); + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_delete_children + * + * PARAMETERS: parent_node - Delete this objects children + * + * RETURN: None. + * + * DESCRIPTION: Delete all children of the parent object. In other words, + * deletes a "scope". + * + ******************************************************************************/ + +void acpi_ns_delete_children(struct acpi_namespace_node *parent_node) +{ + struct acpi_namespace_node *child_node; + struct acpi_namespace_node *next_node; + u8 flags; + + ACPI_FUNCTION_TRACE_PTR(ns_delete_children, parent_node); + + if (!parent_node) { + return_VOID; + } + + /* If no children, all done! */ + + child_node = parent_node->child; + if (!child_node) { + return_VOID; + } + + /* + * Deallocate all children at this level + */ + do { + + /* Get the things we need */ + + next_node = child_node->peer; + flags = child_node->flags; + + /* Grandchildren should have all been deleted already */ + + if (child_node->child) { + ACPI_ERROR((AE_INFO, "Found a grandchild! P=%p C=%p", + parent_node, child_node)); + } + + /* Now we can free this child object */ + + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); + + ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, + "Object %p, Remaining %X\n", child_node, + acpi_gbl_current_node_count)); + + /* + * Detach an object if there is one, then free the child node + */ + acpi_ns_detach_object(child_node); + + /* Now we can delete the node */ + + (void)acpi_os_release_object(acpi_gbl_namespace_cache, + child_node); + + /* And move on to the next child in the list */ + + child_node = next_node; + + } while (!(flags & ANOBJ_END_OF_PEER_LIST)); + + /* Clear the parent's child pointer */ + + parent_node->child = NULL; + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_delete_namespace_subtree + * + * PARAMETERS: parent_node - Root of the subtree to be deleted + * + * RETURN: None. + * + * DESCRIPTION: Delete a subtree of the namespace. This includes all objects + * stored within the subtree. + * + ******************************************************************************/ + +void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node) +{ + struct acpi_namespace_node *child_node = NULL; + u32 level = 1; + + ACPI_FUNCTION_TRACE(ns_delete_namespace_subtree); + + if (!parent_node) { + return_VOID; + } + + /* + * Traverse the tree of objects until we bubble back up + * to where we started. + */ + while (level > 0) { + + /* Get the next node in this scope (NULL if none) */ + + child_node = + acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, + child_node); + if (child_node) { + + /* Found a child node - detach any attached object */ + + acpi_ns_detach_object(child_node); + + /* Check if this node has any children */ + + if (acpi_ns_get_next_node + (ACPI_TYPE_ANY, child_node, NULL)) { + /* + * There is at least one child of this node, + * visit the node + */ + level++; + parent_node = child_node; + child_node = NULL; + } + } else { + /* + * No more children of this parent node. + * Move up to the grandparent. + */ + level--; + + /* + * Now delete all of the children of this parent + * all at the same time. + */ + acpi_ns_delete_children(parent_node); + + /* New "last child" is this parent node */ + + child_node = parent_node; + + /* Move up the tree to the grandparent */ + + parent_node = acpi_ns_get_parent_node(parent_node); + } + } + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_delete_namespace_by_owner + * + * PARAMETERS: owner_id - All nodes with this owner will be deleted + * + * RETURN: Status + * + * DESCRIPTION: Delete entries within the namespace that are owned by a + * specific ID. Used to delete entire ACPI tables. All + * reference counts are updated. + * + * MUTEX: Locks namespace during deletion walk. + * + ******************************************************************************/ + +void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id) +{ + struct acpi_namespace_node *child_node; + struct acpi_namespace_node *deletion_node; + struct acpi_namespace_node *parent_node; + u32 level; + acpi_status status; + + ACPI_FUNCTION_TRACE_U32(ns_delete_namespace_by_owner, owner_id); + + if (owner_id == 0) { + return_VOID; + } + + /* Lock namespace for possible update */ + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_VOID; + } + + deletion_node = NULL; + parent_node = acpi_gbl_root_node; + child_node = NULL; + level = 1; + + /* + * Traverse the tree of nodes until we bubble back up + * to where we started. + */ + while (level > 0) { + /* + * Get the next child of this parent node. When child_node is NULL, + * the first child of the parent is returned + */ + child_node = + acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, + child_node); + + if (deletion_node) { + acpi_ns_delete_children(deletion_node); + acpi_ns_delete_node(deletion_node); + deletion_node = NULL; + } + + if (child_node) { + if (child_node->owner_id == owner_id) { + + /* Found a matching child node - detach any attached object */ + + acpi_ns_detach_object(child_node); + } + + /* Check if this node has any children */ + + if (acpi_ns_get_next_node + (ACPI_TYPE_ANY, child_node, NULL)) { + /* + * There is at least one child of this node, + * visit the node + */ + level++; + parent_node = child_node; + child_node = NULL; + } else if (child_node->owner_id == owner_id) { + deletion_node = child_node; + } + } else { + /* + * No more children of this parent node. + * Move up to the grandparent. + */ + level--; + if (level != 0) { + if (parent_node->owner_id == owner_id) { + deletion_node = parent_node; + } + } + + /* New "last child" is this parent node */ + + child_node = parent_node; + + /* Move up the tree to the grandparent */ + + parent_node = acpi_ns_get_parent_node(parent_node); + } + } + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return_VOID; +} diff --git a/drivers/acpi/namespace/nsdump.c b/drivers/acpi/namespace/nsdump.c new file mode 100644 index 0000000..cc0ae39 --- /dev/null +++ b/drivers/acpi/namespace/nsdump.c @@ -0,0 +1,708 @@ +/****************************************************************************** + * + * Module Name: nsdump - table dumping routines for debug + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsdump") + +/* Local prototypes */ +#ifdef ACPI_OBSOLETE_FUNCTIONS +void acpi_ns_dump_root_devices(void); + +static acpi_status +acpi_ns_dump_one_device(acpi_handle obj_handle, + u32 level, void *context, void **return_value); +#endif + +#if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER) +/******************************************************************************* + * + * FUNCTION: acpi_ns_print_pathname + * + * PARAMETERS: num_segments - Number of ACPI name segments + * Pathname - The compressed (internal) path + * + * RETURN: None + * + * DESCRIPTION: Print an object's full namespace pathname + * + ******************************************************************************/ + +void acpi_ns_print_pathname(u32 num_segments, char *pathname) +{ + u32 i; + + ACPI_FUNCTION_NAME(ns_print_pathname); + + if (!(acpi_dbg_level & ACPI_LV_NAMES) + || !(acpi_dbg_layer & ACPI_NAMESPACE)) { + return; + } + + /* Print the entire name */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "[")); + + while (num_segments) { + for (i = 0; i < 4; i++) { + ACPI_IS_PRINT(pathname[i]) ? + acpi_os_printf("%c", pathname[i]) : + acpi_os_printf("?"); + } + + pathname += ACPI_NAME_SIZE; + num_segments--; + if (num_segments) { + acpi_os_printf("."); + } + } + + acpi_os_printf("]\n"); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_pathname + * + * PARAMETERS: Handle - Object + * Msg - Prefix message + * Level - Desired debug level + * Component - Caller's component ID + * + * RETURN: None + * + * DESCRIPTION: Print an object's full namespace pathname + * Manages allocation/freeing of a pathname buffer + * + ******************************************************************************/ + +void +acpi_ns_dump_pathname(acpi_handle handle, char *msg, u32 level, u32 component) +{ + + ACPI_FUNCTION_TRACE(ns_dump_pathname); + + /* Do this only if the requested debug level and component are enabled */ + + if (!(acpi_dbg_level & level) || !(acpi_dbg_layer & component)) { + return_VOID; + } + + /* Convert handle to a full pathname and print it (with supplied message) */ + + acpi_ns_print_node_pathname(handle, msg); + acpi_os_printf("\n"); + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_one_object + * + * PARAMETERS: obj_handle - Node to be dumped + * Level - Nesting level of the handle + * Context - Passed into walk_namespace + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Dump a single Node + * This procedure is a user_function called by acpi_ns_walk_namespace. + * + ******************************************************************************/ + +acpi_status +acpi_ns_dump_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value) +{ + struct acpi_walk_info *info = (struct acpi_walk_info *)context; + struct acpi_namespace_node *this_node; + union acpi_operand_object *obj_desc = NULL; + acpi_object_type obj_type; + acpi_object_type type; + u32 bytes_to_dump; + u32 dbg_level; + u32 i; + + ACPI_FUNCTION_NAME(ns_dump_one_object); + + /* Is output enabled? */ + + if (!(acpi_dbg_level & info->debug_level)) { + return (AE_OK); + } + + if (!obj_handle) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Null object handle\n")); + return (AE_OK); + } + + this_node = acpi_ns_map_handle_to_node(obj_handle); + type = this_node->type; + + /* Check if the owner matches */ + + if ((info->owner_id != ACPI_OWNER_ID_MAX) && + (info->owner_id != this_node->owner_id)) { + return (AE_OK); + } + + if (!(info->display_type & ACPI_DISPLAY_SHORT)) { + + /* Indent the object according to the level */ + + acpi_os_printf("%2d%*s", (u32) level - 1, (int)level * 2, " "); + + /* Check the node type and name */ + + if (type > ACPI_TYPE_LOCAL_MAX) { + ACPI_WARNING((AE_INFO, "Invalid ACPI Object Type %08X", + type)); + } + + if (!acpi_ut_valid_acpi_name(this_node->name.integer)) { + this_node->name.integer = + acpi_ut_repair_name(this_node->name.ascii); + + ACPI_WARNING((AE_INFO, "Invalid ACPI Name %08X", + this_node->name.integer)); + } + + acpi_os_printf("%4.4s", acpi_ut_get_node_name(this_node)); + } + + /* + * Now we can print out the pertinent information + */ + acpi_os_printf(" %-12s %p %2.2X ", + acpi_ut_get_type_name(type), this_node, + this_node->owner_id); + + dbg_level = acpi_dbg_level; + acpi_dbg_level = 0; + obj_desc = acpi_ns_get_attached_object(this_node); + acpi_dbg_level = dbg_level; + + /* Temp nodes are those nodes created by a control method */ + + if (this_node->flags & ANOBJ_TEMPORARY) { + acpi_os_printf("(T) "); + } + + switch (info->display_type & ACPI_DISPLAY_MASK) { + case ACPI_DISPLAY_SUMMARY: + + if (!obj_desc) { + + /* No attached object, we are done */ + + acpi_os_printf("\n"); + return (AE_OK); + } + + switch (type) { + case ACPI_TYPE_PROCESSOR: + + acpi_os_printf("ID %X Len %.4X Addr %p\n", + obj_desc->processor.proc_id, + obj_desc->processor.length, + ACPI_CAST_PTR(void, + obj_desc->processor. + address)); + break; + + case ACPI_TYPE_DEVICE: + + acpi_os_printf("Notify Object: %p\n", obj_desc); + break; + + case ACPI_TYPE_METHOD: + + acpi_os_printf("Args %X Len %.4X Aml %p\n", + (u32) obj_desc->method.param_count, + obj_desc->method.aml_length, + obj_desc->method.aml_start); + break; + + case ACPI_TYPE_INTEGER: + + acpi_os_printf("= %8.8X%8.8X\n", + ACPI_FORMAT_UINT64(obj_desc->integer. + value)); + break; + + case ACPI_TYPE_PACKAGE: + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + acpi_os_printf("Elements %.2X\n", + obj_desc->package.count); + } else { + acpi_os_printf("[Length not yet evaluated]\n"); + } + break; + + case ACPI_TYPE_BUFFER: + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + acpi_os_printf("Len %.2X", + obj_desc->buffer.length); + + /* Dump some of the buffer */ + + if (obj_desc->buffer.length > 0) { + acpi_os_printf(" ="); + for (i = 0; + (i < obj_desc->buffer.length + && i < 12); i++) { + acpi_os_printf(" %.2hX", + obj_desc->buffer. + pointer[i]); + } + } + acpi_os_printf("\n"); + } else { + acpi_os_printf("[Length not yet evaluated]\n"); + } + break; + + case ACPI_TYPE_STRING: + + acpi_os_printf("Len %.2X ", obj_desc->string.length); + acpi_ut_print_string(obj_desc->string.pointer, 32); + acpi_os_printf("\n"); + break; + + case ACPI_TYPE_REGION: + + acpi_os_printf("[%s]", + acpi_ut_get_region_name(obj_desc->region. + space_id)); + if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { + acpi_os_printf(" Addr %8.8X%8.8X Len %.4X\n", + ACPI_FORMAT_NATIVE_UINT + (obj_desc->region.address), + obj_desc->region.length); + } else { + acpi_os_printf + (" [Address/Length not yet evaluated]\n"); + } + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + + acpi_os_printf("[%s]\n", + acpi_ut_get_reference_name(obj_desc)); + break; + + case ACPI_TYPE_BUFFER_FIELD: + + if (obj_desc->buffer_field.buffer_obj && + obj_desc->buffer_field.buffer_obj->buffer.node) { + acpi_os_printf("Buf [%4.4s]", + acpi_ut_get_node_name(obj_desc-> + buffer_field. + buffer_obj-> + buffer. + node)); + } + break; + + case ACPI_TYPE_LOCAL_REGION_FIELD: + + acpi_os_printf("Rgn [%4.4s]", + acpi_ut_get_node_name(obj_desc-> + common_field. + region_obj->region. + node)); + break; + + case ACPI_TYPE_LOCAL_BANK_FIELD: + + acpi_os_printf("Rgn [%4.4s] Bnk [%4.4s]", + acpi_ut_get_node_name(obj_desc-> + common_field. + region_obj->region. + node), + acpi_ut_get_node_name(obj_desc-> + bank_field. + bank_obj-> + common_field. + node)); + break; + + case ACPI_TYPE_LOCAL_INDEX_FIELD: + + acpi_os_printf("Idx [%4.4s] Dat [%4.4s]", + acpi_ut_get_node_name(obj_desc-> + index_field. + index_obj-> + common_field.node), + acpi_ut_get_node_name(obj_desc-> + index_field. + data_obj-> + common_field. + node)); + break; + + case ACPI_TYPE_LOCAL_ALIAS: + case ACPI_TYPE_LOCAL_METHOD_ALIAS: + + acpi_os_printf("Target %4.4s (%p)\n", + acpi_ut_get_node_name(obj_desc), + obj_desc); + break; + + default: + + acpi_os_printf("Object %p\n", obj_desc); + break; + } + + /* Common field handling */ + + switch (type) { + case ACPI_TYPE_BUFFER_FIELD: + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: + + acpi_os_printf(" Off %.3X Len %.2X Acc %.2hd\n", + (obj_desc->common_field. + base_byte_offset * 8) + + + obj_desc->common_field. + start_field_bit_offset, + obj_desc->common_field.bit_length, + obj_desc->common_field. + access_byte_width); + break; + + default: + break; + } + break; + + case ACPI_DISPLAY_OBJECTS: + + acpi_os_printf("O:%p", obj_desc); + if (!obj_desc) { + + /* No attached object, we are done */ + + acpi_os_printf("\n"); + return (AE_OK); + } + + acpi_os_printf("(R%d)", obj_desc->common.reference_count); + + switch (type) { + case ACPI_TYPE_METHOD: + + /* Name is a Method and its AML offset/length are set */ + + acpi_os_printf(" M:%p-%X\n", obj_desc->method.aml_start, + obj_desc->method.aml_length); + break; + + case ACPI_TYPE_INTEGER: + + acpi_os_printf(" I:%8.8X8.8%X\n", + ACPI_FORMAT_UINT64(obj_desc->integer. + value)); + break; + + case ACPI_TYPE_STRING: + + acpi_os_printf(" S:%p-%X\n", obj_desc->string.pointer, + obj_desc->string.length); + break; + + case ACPI_TYPE_BUFFER: + + acpi_os_printf(" B:%p-%X\n", obj_desc->buffer.pointer, + obj_desc->buffer.length); + break; + + default: + + acpi_os_printf("\n"); + break; + } + break; + + default: + acpi_os_printf("\n"); + break; + } + + /* If debug turned off, done */ + + if (!(acpi_dbg_level & ACPI_LV_VALUES)) { + return (AE_OK); + } + + /* If there is an attached object, display it */ + + dbg_level = acpi_dbg_level; + acpi_dbg_level = 0; + obj_desc = acpi_ns_get_attached_object(this_node); + acpi_dbg_level = dbg_level; + + /* Dump attached objects */ + + while (obj_desc) { + obj_type = ACPI_TYPE_INVALID; + acpi_os_printf("Attached Object %p: ", obj_desc); + + /* Decode the type of attached object and dump the contents */ + + switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { + case ACPI_DESC_TYPE_NAMED: + + acpi_os_printf("(Ptr to Node)\n"); + bytes_to_dump = sizeof(struct acpi_namespace_node); + ACPI_DUMP_BUFFER(obj_desc, bytes_to_dump); + break; + + case ACPI_DESC_TYPE_OPERAND: + + obj_type = ACPI_GET_OBJECT_TYPE(obj_desc); + + if (obj_type > ACPI_TYPE_LOCAL_MAX) { + acpi_os_printf + ("(Pointer to ACPI Object type %.2X [UNKNOWN])\n", + obj_type); + bytes_to_dump = 32; + } else { + acpi_os_printf + ("(Pointer to ACPI Object type %.2X [%s])\n", + obj_type, acpi_ut_get_type_name(obj_type)); + bytes_to_dump = + sizeof(union acpi_operand_object); + } + + ACPI_DUMP_BUFFER(obj_desc, bytes_to_dump); + break; + + default: + + break; + } + + /* If value is NOT an internal object, we are done */ + + if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != + ACPI_DESC_TYPE_OPERAND) { + goto cleanup; + } + + /* + * Valid object, get the pointer to next level, if any + */ + switch (obj_type) { + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_STRING: + /* + * NOTE: takes advantage of common fields between string/buffer + */ + bytes_to_dump = obj_desc->string.length; + obj_desc = (void *)obj_desc->string.pointer; + acpi_os_printf("(Buffer/String pointer %p length %X)\n", + obj_desc, bytes_to_dump); + ACPI_DUMP_BUFFER(obj_desc, bytes_to_dump); + goto cleanup; + + case ACPI_TYPE_BUFFER_FIELD: + obj_desc = + (union acpi_operand_object *)obj_desc->buffer_field. + buffer_obj; + break; + + case ACPI_TYPE_PACKAGE: + obj_desc = (void *)obj_desc->package.elements; + break; + + case ACPI_TYPE_METHOD: + obj_desc = (void *)obj_desc->method.aml_start; + break; + + case ACPI_TYPE_LOCAL_REGION_FIELD: + obj_desc = (void *)obj_desc->field.region_obj; + break; + + case ACPI_TYPE_LOCAL_BANK_FIELD: + obj_desc = (void *)obj_desc->bank_field.region_obj; + break; + + case ACPI_TYPE_LOCAL_INDEX_FIELD: + obj_desc = (void *)obj_desc->index_field.index_obj; + break; + + default: + goto cleanup; + } + + obj_type = ACPI_TYPE_INVALID; /* Terminate loop after next pass */ + } + + cleanup: + acpi_os_printf("\n"); + return (AE_OK); +} + +#ifdef ACPI_FUTURE_USAGE +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_objects + * + * PARAMETERS: Type - Object type to be dumped + * display_type - 0 or ACPI_DISPLAY_SUMMARY + * max_depth - Maximum depth of dump. Use ACPI_UINT32_MAX + * for an effectively unlimited depth. + * owner_id - Dump only objects owned by this ID. Use + * ACPI_UINT32_MAX to match all owners. + * start_handle - Where in namespace to start/end search + * + * RETURN: None + * + * DESCRIPTION: Dump typed objects within the loaded namespace. + * Uses acpi_ns_walk_namespace in conjunction with acpi_ns_dump_one_object. + * + ******************************************************************************/ + +void +acpi_ns_dump_objects(acpi_object_type type, + u8 display_type, + u32 max_depth, + acpi_owner_id owner_id, acpi_handle start_handle) +{ + struct acpi_walk_info info; + + ACPI_FUNCTION_ENTRY(); + + info.debug_level = ACPI_LV_TABLES; + info.owner_id = owner_id; + info.display_type = display_type; + + (void)acpi_ns_walk_namespace(type, start_handle, max_depth, + ACPI_NS_WALK_NO_UNLOCK | + ACPI_NS_WALK_TEMP_NODES, + acpi_ns_dump_one_object, (void *)&info, + NULL); +} +#endif /* ACPI_FUTURE_USAGE */ + +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_entry + * + * PARAMETERS: Handle - Node to be dumped + * debug_level - Output level + * + * RETURN: None + * + * DESCRIPTION: Dump a single Node + * + ******************************************************************************/ + +void acpi_ns_dump_entry(acpi_handle handle, u32 debug_level) +{ + struct acpi_walk_info info; + + ACPI_FUNCTION_ENTRY(); + + info.debug_level = debug_level; + info.owner_id = ACPI_OWNER_ID_MAX; + info.display_type = ACPI_DISPLAY_SUMMARY; + + (void)acpi_ns_dump_one_object(handle, 1, &info, NULL); +} + +#ifdef ACPI_ASL_COMPILER +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_tables + * + * PARAMETERS: search_base - Root of subtree to be dumped, or + * NS_ALL to dump the entire namespace + * max_depth - Maximum depth of dump. Use INT_MAX + * for an effectively unlimited depth. + * + * RETURN: None + * + * DESCRIPTION: Dump the name space, or a portion of it. + * + ******************************************************************************/ + +void acpi_ns_dump_tables(acpi_handle search_base, u32 max_depth) +{ + acpi_handle search_handle = search_base; + + ACPI_FUNCTION_TRACE(ns_dump_tables); + + if (!acpi_gbl_root_node) { + /* + * If the name space has not been initialized, + * there is nothing to dump. + */ + ACPI_DEBUG_PRINT((ACPI_DB_TABLES, + "namespace not initialized!\n")); + return_VOID; + } + + if (ACPI_NS_ALL == search_base) { + + /* Entire namespace */ + + search_handle = acpi_gbl_root_node; + ACPI_DEBUG_PRINT((ACPI_DB_TABLES, "\\\n")); + } + + acpi_ns_dump_objects(ACPI_TYPE_ANY, ACPI_DISPLAY_OBJECTS, max_depth, + ACPI_OWNER_ID_MAX, search_handle); + return_VOID; +} +#endif /* _ACPI_ASL_COMPILER */ +#endif /* defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER) */ diff --git a/drivers/acpi/namespace/nsdumpdv.c b/drivers/acpi/namespace/nsdumpdv.c new file mode 100644 index 0000000..428f50f --- /dev/null +++ b/drivers/acpi/namespace/nsdumpdv.c @@ -0,0 +1,140 @@ +/****************************************************************************** + * + * Module Name: nsdump - table dumping routines for debug + * + *****************************************************************************/ + +/* + * 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> + +/* TBD: This entire module is apparently obsolete and should be removed */ + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsdumpdv") +#ifdef ACPI_OBSOLETE_FUNCTIONS +#if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER) +#include <acpi/acnamesp.h> +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_one_device + * + * PARAMETERS: Handle - Node to be dumped + * Level - Nesting level of the handle + * Context - Passed into walk_namespace + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Dump a single Node that represents a device + * This procedure is a user_function called by acpi_ns_walk_namespace. + * + ******************************************************************************/ +static acpi_status +acpi_ns_dump_one_device(acpi_handle obj_handle, + u32 level, void *context, void **return_value) +{ + struct acpi_buffer buffer; + struct acpi_device_info *info; + acpi_status status; + u32 i; + + ACPI_FUNCTION_NAME(ns_dump_one_device); + + status = + acpi_ns_dump_one_object(obj_handle, level, context, return_value); + + buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; + status = acpi_get_object_info(obj_handle, &buffer); + if (ACPI_SUCCESS(status)) { + info = buffer.pointer; + for (i = 0; i < level; i++) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_TABLES, " ")); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_TABLES, + " HID: %s, ADR: %8.8X%8.8X, Status: %X\n", + info->hardware_id.value, + ACPI_FORMAT_UINT64(info->address), + info->current_status)); + ACPI_FREE(info); + } + + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_dump_root_devices + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Dump all objects of type "device" + * + ******************************************************************************/ + +void acpi_ns_dump_root_devices(void) +{ + acpi_handle sys_bus_handle; + acpi_status status; + + ACPI_FUNCTION_NAME(ns_dump_root_devices); + + /* Only dump the table if tracing is enabled */ + + if (!(ACPI_LV_TABLES & acpi_dbg_level)) { + return; + } + + status = acpi_get_handle(NULL, ACPI_NS_SYSTEM_BUS, &sys_bus_handle); + if (ACPI_FAILURE(status)) { + return; + } + + ACPI_DEBUG_PRINT((ACPI_DB_TABLES, + "Display of all devices in the namespace:\n")); + + status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, sys_bus_handle, + ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, + acpi_ns_dump_one_device, NULL, NULL); +} + +#endif +#endif diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c new file mode 100644 index 0000000..4cdf03a --- /dev/null +++ b/drivers/acpi/namespace/nseval.c @@ -0,0 +1,319 @@ +/******************************************************************************* + * + * Module Name: nseval - Object evaluation, includes control method execution + * + ******************************************************************************/ + +/* + * 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/acparser.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nseval") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_evaluate + * + * PARAMETERS: Info - Evaluation info block, contains: + * prefix_node - Prefix or Method/Object Node to execute + * Pathname - Name of method to execute, If NULL, the + * Node is the object to execute + * Parameters - List of parameters to pass to the method, + * terminated by NULL. Params itself may be + * NULL if no parameters are being passed. + * return_object - Where to put method's return value (if + * any). If NULL, no value is returned. + * parameter_type - Type of Parameter list + * return_object - Where to put method's return value (if + * any). If NULL, no value is returned. + * Flags - ACPI_IGNORE_RETURN_VALUE to delete return + * + * RETURN: Status + * + * DESCRIPTION: Execute a control method or return the current value of an + * ACPI namespace object. + * + * MUTEX: Locks interpreter + * + ******************************************************************************/ +acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) +{ + acpi_status status; + struct acpi_namespace_node *node; + + ACPI_FUNCTION_TRACE(ns_evaluate); + + if (!info) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Initialize the return value to an invalid object */ + + info->return_object = NULL; + + /* + * Get the actual namespace node for the target object. Handles these cases: + * + * 1) Null node, Pathname (absolute path) + * 2) Node, Pathname (path relative to Node) + * 3) Node, Null Pathname + */ + status = acpi_ns_get_node(info->prefix_node, info->pathname, + ACPI_NS_NO_UPSEARCH, &info->resolved_node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * For a method alias, we must grab the actual method node so that proper + * scoping context will be established before execution. + */ + if (acpi_ns_get_type(info->resolved_node) == + ACPI_TYPE_LOCAL_METHOD_ALIAS) { + info->resolved_node = + ACPI_CAST_PTR(struct acpi_namespace_node, + info->resolved_node->object); + } + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n", info->pathname, + info->resolved_node, + acpi_ns_get_attached_object(info->resolved_node))); + + node = info->resolved_node; + + /* + * Two major cases here: + * + * 1) The object is a control method -- execute it + * 2) The object is not a method -- just return it's current value + */ + if (acpi_ns_get_type(info->resolved_node) == ACPI_TYPE_METHOD) { + /* + * 1) Object is a control method - execute it + */ + + /* Verify that there is a method object associated with this node */ + + info->obj_desc = + acpi_ns_get_attached_object(info->resolved_node); + if (!info->obj_desc) { + ACPI_ERROR((AE_INFO, + "Control method has no attached sub-object")); + return_ACPI_STATUS(AE_NULL_OBJECT); + } + + /* + * Calculate the number of arguments being passed to the method + */ + + info->param_count = 0; + if (info->parameters) { + while (info->parameters[info->param_count]) + info->param_count++; + } + + /* + * Warning if too few or too many arguments have been passed by the + * caller. We don't want to abort here with an error because an + * incorrect number of arguments may not cause the method to fail. + * However, the method will fail if there are too few arguments passed + * and the method attempts to use one of the missing ones. + */ + + if (info->param_count < info->obj_desc->method.param_count) { + ACPI_WARNING((AE_INFO, + "Insufficient arguments - " + "method [%4.4s] needs %d, found %d", + acpi_ut_get_node_name(info->resolved_node), + info->obj_desc->method.param_count, + info->param_count)); + } else if (info->param_count > + info->obj_desc->method.param_count) { + ACPI_WARNING((AE_INFO, + "Excess arguments - " + "method [%4.4s] needs %d, found %d", + acpi_ut_get_node_name(info-> + resolved_node), + info->obj_desc->method.param_count, + info->param_count)); + } + + ACPI_DUMP_PATHNAME(info->resolved_node, "Execute Method:", + ACPI_LV_INFO, _COMPONENT); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Method at AML address %p Length %X\n", + info->obj_desc->method.aml_start + 1, + info->obj_desc->method.aml_length - 1)); + + /* + * Any namespace deletion must acquire both the namespace and + * interpreter locks to ensure that no thread is using the portion of + * the namespace that is being deleted. + * + * Execute the method via the interpreter. The interpreter is locked + * here before calling into the AML parser + */ + acpi_ex_enter_interpreter(); + status = acpi_ps_execute_method(info); + acpi_ex_exit_interpreter(); + } else { + /* + * 2) Object is not a method, return its current value + * + * Disallow certain object types. For these, "evaluation" is undefined. + */ + switch (info->resolved_node->type) { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_REGION: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_LOCAL_SCOPE: + + ACPI_ERROR((AE_INFO, + "[%4.4s] Evaluation of object type [%s] is not supported", + info->resolved_node->name.ascii, + acpi_ut_get_type_name(info->resolved_node-> + type))); + + return_ACPI_STATUS(AE_TYPE); + + default: + break; + } + + /* + * Objects require additional resolution steps (e.g., the Node may be + * a field that must be read, etc.) -- we can't just grab the object + * out of the node. + * + * Use resolve_node_to_value() to get the associated value. + * + * NOTE: we can get away with passing in NULL for a walk state because + * resolved_node is guaranteed to not be a reference to either a method + * local or a method argument (because this interface is never called + * from a running method.) + * + * Even though we do not directly invoke the interpreter for object + * resolution, we must lock it because we could access an opregion. + * The opregion access code assumes that the interpreter is locked. + */ + acpi_ex_enter_interpreter(); + + /* Function has a strange interface */ + + status = + acpi_ex_resolve_node_to_value(&info->resolved_node, NULL); + acpi_ex_exit_interpreter(); + + /* + * If acpi_ex_resolve_node_to_value() succeeded, the return value was placed + * in resolved_node. + */ + if (ACPI_SUCCESS(status)) { + status = AE_CTRL_RETURN_VALUE; + info->return_object = + ACPI_CAST_PTR(union acpi_operand_object, + info->resolved_node); + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Returning object %p [%s]\n", + info->return_object, + acpi_ut_get_object_type_name(info-> + return_object))); + } + } + + /* Validation of return values for ACPI-predefined methods and objects */ + + if ((status == AE_OK) || (status == AE_CTRL_RETURN_VALUE)) { + /* + * If this is the first evaluation, check the return value. This + * ensures that any warnings will only be emitted during the very + * first evaluation of the object. + */ + if (!(node->flags & ANOBJ_EVALUATED)) { + /* + * Check for a predefined ACPI name. If found, validate the + * returned object. + * + * Note: Ignore return status for now, emit warnings if there are + * problems with the returned object. May change later to abort + * the method on invalid return object. + */ + (void)acpi_ns_check_predefined_names(node, + info-> + return_object); + } + + /* Mark the node as having been evaluated */ + + node->flags |= ANOBJ_EVALUATED; + } + + /* Check if there is a return value that must be dealt with */ + + if (status == AE_CTRL_RETURN_VALUE) { + + /* If caller does not want the return value, delete it */ + + if (info->flags & ACPI_IGNORE_RETURN_VALUE) { + acpi_ut_remove_reference(info->return_object); + info->return_object = NULL; + } + + /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */ + + status = AE_OK; + } + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "*** Completed evaluation of object %s ***\n", + info->pathname)); + + /* + * Namespace was unlocked by the handling acpi_ns* function, so we + * just return + */ + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/namespace/nsinit.c b/drivers/acpi/namespace/nsinit.c new file mode 100644 index 0000000..e4c5751 --- /dev/null +++ b/drivers/acpi/namespace/nsinit.c @@ -0,0 +1,592 @@ +/****************************************************************************** + * + * Module Name: nsinit - namespace initialization + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <linux/nmi.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsinit") + +/* Local prototypes */ +static acpi_status +acpi_ns_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value); + +static acpi_status +acpi_ns_init_one_device(acpi_handle obj_handle, + u32 nesting_level, void *context, void **return_value); + +static acpi_status +acpi_ns_find_ini_methods(acpi_handle obj_handle, + u32 nesting_level, void *context, void **return_value); + +/******************************************************************************* + * + * FUNCTION: acpi_ns_initialize_objects + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Walk the entire namespace and perform any necessary + * initialization on the objects found therein + * + ******************************************************************************/ + +acpi_status acpi_ns_initialize_objects(void) +{ + acpi_status status; + struct acpi_init_walk_info info; + + ACPI_FUNCTION_TRACE(ns_initialize_objects); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "**** Starting initialization of namespace objects ****\n")); + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "Completing Region/Field/Buffer/Package initialization:")); + + /* Set all init info to zero */ + + ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); + + /* Walk entire namespace from the supplied root */ + + status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, acpi_ns_init_one_object, + &info, NULL); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n", + info.op_region_init, info.op_region_count, + info.field_init, info.field_count, + info.buffer_init, info.buffer_count, + info.package_init, info.package_count, + info.object_count)); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "%hd Control Methods found\n", info.method_count)); + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "%hd Op Regions found\n", info.op_region_count)); + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_initialize_devices + * + * PARAMETERS: None + * + * RETURN: acpi_status + * + * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. + * This means running _INI on all present devices. + * + * Note: We install PCI config space handler on region access, + * not here. + * + ******************************************************************************/ + +acpi_status acpi_ns_initialize_devices(void) +{ + acpi_status status; + struct acpi_device_walk_info info; + + ACPI_FUNCTION_TRACE(ns_initialize_devices); + + /* Init counters */ + + info.device_count = 0; + info.num_STA = 0; + info.num_INI = 0; + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "Initializing Device/Processor/Thermal objects by executing _INI methods:")); + + /* Tree analysis: find all subtrees that contain _INI methods */ + + status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, FALSE, + acpi_ns_find_ini_methods, &info, NULL); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + + /* Allocate the evaluation information block */ + + info.evaluate_info = + ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); + if (!info.evaluate_info) { + status = AE_NO_MEMORY; + goto error_exit; + } + + /* Walk namespace to execute all _INIs on present devices */ + + status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, FALSE, + acpi_ns_init_one_device, &info, NULL); + + ACPI_FREE(info.evaluate_info); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n", + info.num_INI, info.num_STA, info.device_count)); + + return_ACPI_STATUS(status); + + error_exit: + ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_init_one_object + * + * PARAMETERS: obj_handle - Node + * Level - Current nesting level + * Context - Points to a init info struct + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object + * within the namespace. + * + * Currently, the only objects that require initialization are: + * 1) Methods + * 2) Op Regions + * + ******************************************************************************/ + +static acpi_status +acpi_ns_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value) +{ + acpi_object_type type; + acpi_status status = AE_OK; + struct acpi_init_walk_info *info = + (struct acpi_init_walk_info *)context; + struct acpi_namespace_node *node = + (struct acpi_namespace_node *)obj_handle; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_NAME(ns_init_one_object); + + info->object_count++; + + /* And even then, we are only interested in a few object types */ + + type = acpi_ns_get_type(obj_handle); + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return (AE_OK); + } + + /* Increment counters for object types we are looking for */ + + switch (type) { + case ACPI_TYPE_REGION: + info->op_region_count++; + break; + + case ACPI_TYPE_BUFFER_FIELD: + info->field_count++; + break; + + case ACPI_TYPE_LOCAL_BANK_FIELD: + info->field_count++; + break; + + case ACPI_TYPE_BUFFER: + info->buffer_count++; + break; + + case ACPI_TYPE_PACKAGE: + info->package_count++; + break; + + default: + + /* No init required, just exit now */ + return (AE_OK); + } + + /* + * If the object is already initialized, nothing else to do + */ + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + return (AE_OK); + } + + /* + * Must lock the interpreter before executing AML code + */ + acpi_ex_enter_interpreter(); + + /* + * Each of these types can contain executable AML code within the + * declaration. + */ + switch (type) { + case ACPI_TYPE_REGION: + + info->op_region_init++; + status = acpi_ds_get_region_arguments(obj_desc); + break; + + case ACPI_TYPE_BUFFER_FIELD: + + info->field_init++; + status = acpi_ds_get_buffer_field_arguments(obj_desc); + break; + + case ACPI_TYPE_LOCAL_BANK_FIELD: + + info->field_init++; + status = acpi_ds_get_bank_field_arguments(obj_desc); + break; + + case ACPI_TYPE_BUFFER: + + info->buffer_init++; + status = acpi_ds_get_buffer_arguments(obj_desc); + break; + + case ACPI_TYPE_PACKAGE: + + info->package_init++; + status = acpi_ds_get_package_arguments(obj_desc); + break; + + default: + /* No other types can get here */ + break; + } + + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not execute arguments for [%4.4s] (%s)", + acpi_ut_get_node_name(node), + acpi_ut_get_type_name(type))); + } + + /* + * Print a dot for each object unless we are going to print the entire + * pathname + */ + if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); + } + + /* + * We ignore errors from above, and always return OK, since we don't want + * to abort the walk on any single error. + */ + acpi_ex_exit_interpreter(); + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_find_ini_methods + * + * PARAMETERS: acpi_walk_callback + * + * RETURN: acpi_status + * + * DESCRIPTION: Called during namespace walk. Finds objects named _INI under + * device/processor/thermal objects, and marks the entire subtree + * with a SUBTREE_HAS_INI flag. This flag is used during the + * subsequent device initialization walk to avoid entire subtrees + * that do not contain an _INI. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_find_ini_methods(acpi_handle obj_handle, + u32 nesting_level, void *context, void **return_value) +{ + struct acpi_device_walk_info *info = + ACPI_CAST_PTR(struct acpi_device_walk_info, context); + struct acpi_namespace_node *node; + struct acpi_namespace_node *parent_node; + + /* Keep count of device/processor/thermal objects */ + + node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); + if ((node->type == ACPI_TYPE_DEVICE) || + (node->type == ACPI_TYPE_PROCESSOR) || + (node->type == ACPI_TYPE_THERMAL)) { + info->device_count++; + return (AE_OK); + } + + /* We are only looking for methods named _INI */ + + if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { + return (AE_OK); + } + + /* + * The only _INI methods that we care about are those that are + * present under Device, Processor, and Thermal objects. + */ + parent_node = acpi_ns_get_parent_node(node); + switch (parent_node->type) { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + + /* Mark parent and bubble up the INI present flag to the root */ + + while (parent_node) { + parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; + parent_node = acpi_ns_get_parent_node(parent_node); + } + break; + + default: + break; + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_init_one_device + * + * PARAMETERS: acpi_walk_callback + * + * RETURN: acpi_status + * + * DESCRIPTION: This is called once per device soon after ACPI is enabled + * to initialize each device. It determines if the device is + * present, and if so, calls _INI. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_init_one_device(acpi_handle obj_handle, + u32 nesting_level, void *context, void **return_value) +{ + struct acpi_device_walk_info *walk_info = + ACPI_CAST_PTR(struct acpi_device_walk_info, context); + struct acpi_evaluate_info *info = walk_info->evaluate_info; + u32 flags; + acpi_status status; + struct acpi_namespace_node *device_node; + + ACPI_FUNCTION_TRACE(ns_init_one_device); + + /* We are interested in Devices, Processors and thermal_zones only */ + + device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); + if ((device_node->type != ACPI_TYPE_DEVICE) && + (device_node->type != ACPI_TYPE_PROCESSOR) && + (device_node->type != ACPI_TYPE_THERMAL)) { + return_ACPI_STATUS(AE_OK); + } + + /* + * Because of an earlier namespace analysis, all subtrees that contain an + * _INI method are tagged. + * + * If this device subtree does not contain any _INI methods, we + * can exit now and stop traversing this entire subtree. + */ + if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { + return_ACPI_STATUS(AE_CTRL_DEPTH); + } + + /* + * Run _STA to determine if this device is present and functioning. We + * must know this information for two important reasons (from ACPI spec): + * + * 1) We can only run _INI if the device is present. + * 2) We must abort the device tree walk on this subtree if the device is + * not present and is not functional (we will not examine the children) + * + * The _STA method is not required to be present under the device, we + * assume the device is present if _STA does not exist. + */ + ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname + (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); + + status = acpi_ut_execute_STA(device_node, &flags); + if (ACPI_FAILURE(status)) { + + /* Ignore error and move on to next device */ + + return_ACPI_STATUS(AE_OK); + } + + /* + * Flags == -1 means that _STA was not found. In this case, we assume that + * the device is both present and functional. + * + * From the ACPI spec, description of _STA: + * + * "If a device object (including the processor object) does not have an + * _STA object, then OSPM assumes that all of the above bits are set (in + * other words, the device is present, ..., and functioning)" + */ + if (flags != ACPI_UINT32_MAX) { + walk_info->num_STA++; + } + + /* + * Examine the PRESENT and FUNCTIONING status bits + * + * Note: ACPI spec does not seem to specify behavior for the present but + * not functioning case, so we assume functioning if present. + */ + if (!(flags & ACPI_STA_DEVICE_PRESENT)) { + + /* Device is not present, we must examine the Functioning bit */ + + if (flags & ACPI_STA_DEVICE_FUNCTIONING) { + /* + * Device is not present but is "functioning". In this case, + * we will not run _INI, but we continue to examine the children + * of this device. + * + * From the ACPI spec, description of _STA: (Note - no mention + * of whether to run _INI or not on the device in question) + * + * "_STA may return bit 0 clear (not present) with bit 3 set + * (device is functional). This case is used to indicate a valid + * device for which no device driver should be loaded (for example, + * a bridge device.) Children of this device may be present and + * valid. OSPM should continue enumeration below a device whose + * _STA returns this bit combination" + */ + return_ACPI_STATUS(AE_OK); + } else { + /* + * Device is not present and is not functioning. We must abort the + * walk of this subtree immediately -- don't look at the children + * of such a device. + * + * From the ACPI spec, description of _INI: + * + * "If the _STA method indicates that the device is not present, + * OSPM will not run the _INI and will not examine the children + * of the device for _INI methods" + */ + return_ACPI_STATUS(AE_CTRL_DEPTH); + } + } + + /* + * The device is present or is assumed present if no _STA exists. + * Run the _INI if it exists (not required to exist) + * + * Note: We know there is an _INI within this subtree, but it may not be + * under this particular device, it may be lower in the branch. + */ + ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname + (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI)); + + info->prefix_node = device_node; + info->pathname = METHOD_NAME__INI; + info->parameters = NULL; + info->flags = ACPI_IGNORE_RETURN_VALUE; + + /* + * Some hardware relies on this being executed as atomically + * as possible (without an NMI being received in the middle of + * this) - so disable NMIs and initialize the device: + */ + acpi_nmi_disable(); + status = acpi_ns_evaluate(info); + acpi_nmi_enable(); + + if (ACPI_SUCCESS(status)) { + walk_info->num_INI++; + + if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && + (!(acpi_dbg_level & ACPI_LV_INFO))) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); + } + } +#ifdef ACPI_DEBUG_OUTPUT + else if (status != AE_NOT_FOUND) { + + /* Ignore error and move on to next device */ + + char *scope_name = + acpi_ns_get_external_pathname(info->resolved_node); + + ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution", + scope_name)); + ACPI_FREE(scope_name); + } +#endif + + /* Ignore errors from above */ + + status = AE_OK; + + /* + * The _INI method has been run if present; call the Global Initialization + * Handler for this device. + */ + if (acpi_gbl_init_handler) { + status = + acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); + } + + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/namespace/nsload.c b/drivers/acpi/namespace/nsload.c new file mode 100644 index 0000000..a4a412b --- /dev/null +++ b/drivers/acpi/namespace/nsload.c @@ -0,0 +1,314 @@ +/****************************************************************************** + * + * Module Name: nsload - namespace loading/expanding/contracting procedures + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> +#include <acpi/acdispat.h> +#include <acpi/actables.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsload") + +/* Local prototypes */ +#ifdef ACPI_FUTURE_IMPLEMENTATION +acpi_status acpi_ns_unload_namespace(acpi_handle handle); + +static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle); +#endif + +#ifndef ACPI_NO_METHOD_EXECUTION +/******************************************************************************* + * + * FUNCTION: acpi_ns_load_table + * + * PARAMETERS: table_index - Index for table to be loaded + * Node - Owning NS node + * + * RETURN: Status + * + * DESCRIPTION: Load one ACPI table into the namespace + * + ******************************************************************************/ + +acpi_status +acpi_ns_load_table(u32 table_index, struct acpi_namespace_node *node) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ns_load_table); + + /* + * Parse the table and load the namespace with all named + * objects found within. Control methods are NOT parsed + * at this time. In fact, the control methods cannot be + * parsed until the entire namespace is loaded, because + * if a control method makes a forward reference (call) + * to another control method, we can't continue parsing + * because we don't know how many arguments to parse next! + */ + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* If table already loaded into namespace, just return */ + + if (acpi_tb_is_table_loaded(table_index)) { + status = AE_ALREADY_EXISTS; + goto unlock; + } + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "**** Loading table into namespace ****\n")); + + status = acpi_tb_allocate_owner_id(table_index); + if (ACPI_FAILURE(status)) { + goto unlock; + } + + status = acpi_ns_parse_table(table_index, node); + if (ACPI_SUCCESS(status)) { + acpi_tb_set_table_loaded_flag(table_index, TRUE); + } else { + (void)acpi_tb_release_owner_id(table_index); + } + + unlock: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * Now we can parse the control methods. We always parse + * them here for a sanity check, and if configured for + * just-in-time parsing, we delete the control method + * parse trees. + */ + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "**** Begin Table Method Parsing and Object Initialization ****\n")); + + status = acpi_ds_initialize_objects(table_index, node); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "**** Completed Table Method Parsing and Object Initialization ****\n")); + + return_ACPI_STATUS(status); +} + +#ifdef ACPI_OBSOLETE_FUNCTIONS +/******************************************************************************* + * + * FUNCTION: acpi_load_namespace + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Load the name space from what ever is pointed to by DSDT. + * (DSDT points to either the BIOS or a buffer.) + * + ******************************************************************************/ + +acpi_status acpi_ns_load_namespace(void) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_load_name_space); + + /* There must be at least a DSDT installed */ + + if (acpi_gbl_DSDT == NULL) { + ACPI_ERROR((AE_INFO, "DSDT is not in memory")); + return_ACPI_STATUS(AE_NO_ACPI_TABLES); + } + + /* + * Load the namespace. The DSDT is required, + * but the SSDT and PSDT tables are optional. + */ + status = acpi_ns_load_table_by_type(ACPI_TABLE_ID_DSDT); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Ignore exceptions from these */ + + (void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_SSDT); + (void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_PSDT); + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "ACPI Namespace successfully loaded at root %p\n", + acpi_gbl_root_node)); + + return_ACPI_STATUS(status); +} +#endif + +#ifdef ACPI_FUTURE_IMPLEMENTATION +/******************************************************************************* + * + * FUNCTION: acpi_ns_delete_subtree + * + * PARAMETERS: start_handle - Handle in namespace where search begins + * + * RETURNS Status + * + * DESCRIPTION: Walks the namespace starting at the given handle and deletes + * all objects, entries, and scopes in the entire subtree. + * + * Namespace/Interpreter should be locked or the subsystem should + * be in shutdown before this routine is called. + * + ******************************************************************************/ + +static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle) +{ + acpi_status status; + acpi_handle child_handle; + acpi_handle parent_handle; + acpi_handle next_child_handle; + acpi_handle dummy; + u32 level; + + ACPI_FUNCTION_TRACE(ns_delete_subtree); + + parent_handle = start_handle; + child_handle = NULL; + level = 1; + + /* + * Traverse the tree of objects until we bubble back up + * to where we started. + */ + while (level > 0) { + + /* Attempt to get the next object in this scope */ + + status = acpi_get_next_object(ACPI_TYPE_ANY, parent_handle, + child_handle, &next_child_handle); + + child_handle = next_child_handle; + + /* Did we get a new object? */ + + if (ACPI_SUCCESS(status)) { + + /* Check if this object has any children */ + + if (ACPI_SUCCESS + (acpi_get_next_object + (ACPI_TYPE_ANY, child_handle, NULL, &dummy))) { + /* + * There is at least one child of this object, + * visit the object + */ + level++; + parent_handle = child_handle; + child_handle = NULL; + } + } else { + /* + * No more children in this object, go back up to + * the object's parent + */ + level--; + + /* Delete all children now */ + + acpi_ns_delete_children(child_handle); + + child_handle = parent_handle; + status = acpi_get_parent(parent_handle, &parent_handle); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } + + /* Now delete the starting object, and we are done */ + + acpi_ns_delete_node(child_handle); + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_unload_name_space + * + * PARAMETERS: Handle - Root of namespace subtree to be deleted + * + * RETURN: Status + * + * DESCRIPTION: Shrinks the namespace, typically in response to an undocking + * event. Deletes an entire subtree starting from (and + * including) the given handle. + * + ******************************************************************************/ + +acpi_status acpi_ns_unload_namespace(acpi_handle handle) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ns_unload_name_space); + + /* Parameter validation */ + + if (!acpi_gbl_root_node) { + return_ACPI_STATUS(AE_NO_NAMESPACE); + } + + if (!handle) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* This function does the real work */ + + status = acpi_ns_delete_subtree(handle); + + return_ACPI_STATUS(status); +} +#endif +#endif diff --git a/drivers/acpi/namespace/nsnames.c b/drivers/acpi/namespace/nsnames.c new file mode 100644 index 0000000..42a39a7 --- /dev/null +++ b/drivers/acpi/namespace/nsnames.c @@ -0,0 +1,264 @@ +/******************************************************************************* + * + * Module Name: nsnames - Name manipulation and 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/amlcode.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsnames") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_build_external_path + * + * PARAMETERS: Node - NS node whose pathname is needed + * Size - Size of the pathname + * *name_buffer - Where to return the pathname + * + * RETURN: Status + * Places the pathname into the name_buffer, in external format + * (name segments separated by path separators) + * + * DESCRIPTION: Generate a full pathaname + * + ******************************************************************************/ +acpi_status +acpi_ns_build_external_path(struct acpi_namespace_node *node, + acpi_size size, char *name_buffer) +{ + acpi_size index; + struct acpi_namespace_node *parent_node; + + ACPI_FUNCTION_ENTRY(); + + /* Special case for root */ + + index = size - 1; + if (index < ACPI_NAME_SIZE) { + name_buffer[0] = AML_ROOT_PREFIX; + name_buffer[1] = 0; + return (AE_OK); + } + + /* Store terminator byte, then build name backwards */ + + parent_node = node; + name_buffer[index] = 0; + + while ((index > ACPI_NAME_SIZE) && (parent_node != acpi_gbl_root_node)) { + index -= ACPI_NAME_SIZE; + + /* Put the name into the buffer */ + + ACPI_MOVE_32_TO_32((name_buffer + index), &parent_node->name); + parent_node = acpi_ns_get_parent_node(parent_node); + + /* Prefix name with the path separator */ + + index--; + name_buffer[index] = ACPI_PATH_SEPARATOR; + } + + /* Overwrite final separator with the root prefix character */ + + name_buffer[index] = AML_ROOT_PREFIX; + + if (index != 0) { + ACPI_ERROR((AE_INFO, + "Could not construct external pathname; index=%X, size=%X, Path=%s", + (u32) index, (u32) size, &name_buffer[size])); + + return (AE_BAD_PARAMETER); + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_external_pathname + * + * PARAMETERS: Node - Namespace node whose pathname is needed + * + * RETURN: Pointer to storage containing the fully qualified name of + * the node, In external format (name segments separated by path + * separators.) + * + * DESCRIPTION: Used for debug printing in acpi_ns_search_table(). + * + ******************************************************************************/ + +char *acpi_ns_get_external_pathname(struct acpi_namespace_node *node) +{ + acpi_status status; + char *name_buffer; + acpi_size size; + + ACPI_FUNCTION_TRACE_PTR(ns_get_external_pathname, node); + + /* Calculate required buffer size based on depth below root */ + + size = acpi_ns_get_pathname_length(node); + if (!size) { + return_PTR(NULL); + } + + /* Allocate a buffer to be returned to caller */ + + name_buffer = ACPI_ALLOCATE_ZEROED(size); + if (!name_buffer) { + ACPI_ERROR((AE_INFO, "Allocation failure")); + return_PTR(NULL); + } + + /* Build the path in the allocated buffer */ + + status = acpi_ns_build_external_path(node, size, name_buffer); + if (ACPI_FAILURE(status)) { + ACPI_FREE(name_buffer); + return_PTR(NULL); + } + + return_PTR(name_buffer); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_pathname_length + * + * PARAMETERS: Node - Namespace node + * + * RETURN: Length of path, including prefix + * + * DESCRIPTION: Get the length of the pathname string for this node + * + ******************************************************************************/ + +acpi_size acpi_ns_get_pathname_length(struct acpi_namespace_node *node) +{ + acpi_size size; + struct acpi_namespace_node *next_node; + + ACPI_FUNCTION_ENTRY(); + + /* + * Compute length of pathname as 5 * number of name segments. + * Go back up the parent tree to the root + */ + size = 0; + next_node = node; + + while (next_node && (next_node != acpi_gbl_root_node)) { + if (ACPI_GET_DESCRIPTOR_TYPE(next_node) != ACPI_DESC_TYPE_NAMED) { + ACPI_ERROR((AE_INFO, + "Invalid Namespace Node (%p) while traversing namespace", + next_node)); + return 0; + } + size += ACPI_PATH_SEGMENT_LENGTH; + next_node = acpi_ns_get_parent_node(next_node); + } + + if (!size) { + size = 1; /* Root node case */ + } + + return (size + 1); /* +1 for null string terminator */ +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_handle_to_pathname + * + * PARAMETERS: target_handle - Handle of named object whose name is + * to be found + * Buffer - Where the pathname is returned + * + * RETURN: Status, Buffer is filled with pathname if status is AE_OK + * + * DESCRIPTION: Build and return a full namespace pathname + * + ******************************************************************************/ + +acpi_status +acpi_ns_handle_to_pathname(acpi_handle target_handle, + struct acpi_buffer * buffer) +{ + acpi_status status; + struct acpi_namespace_node *node; + acpi_size required_size; + + ACPI_FUNCTION_TRACE_PTR(ns_handle_to_pathname, target_handle); + + node = acpi_ns_map_handle_to_node(target_handle); + if (!node) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Determine size required for the caller buffer */ + + required_size = acpi_ns_get_pathname_length(node); + if (!required_size) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer(buffer, required_size); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Build the path in the caller buffer */ + + status = + acpi_ns_build_external_path(node, required_size, buffer->pointer); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s [%X]\n", + (char *)buffer->pointer, (u32) required_size)); + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/namespace/nsobject.c b/drivers/acpi/namespace/nsobject.c new file mode 100644 index 0000000..15fe09e --- /dev/null +++ b/drivers/acpi/namespace/nsobject.c @@ -0,0 +1,440 @@ +/******************************************************************************* + * + * Module Name: nsobject - Utilities for objects attached to namespace + * table entries + * + ******************************************************************************/ + +/* + * 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/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsobject") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_attach_object + * + * PARAMETERS: Node - Parent Node + * Object - Object to be attached + * Type - Type of object, or ACPI_TYPE_ANY if not + * known + * + * RETURN: Status + * + * DESCRIPTION: Record the given object as the value associated with the + * name whose acpi_handle is passed. If Object is NULL + * and Type is ACPI_TYPE_ANY, set the name as having no value. + * Note: Future may require that the Node->Flags field be passed + * as a parameter. + * + * MUTEX: Assumes namespace is locked + * + ******************************************************************************/ +acpi_status +acpi_ns_attach_object(struct acpi_namespace_node *node, + union acpi_operand_object *object, acpi_object_type type) +{ + union acpi_operand_object *obj_desc; + union acpi_operand_object *last_obj_desc; + acpi_object_type object_type = ACPI_TYPE_ANY; + + ACPI_FUNCTION_TRACE(ns_attach_object); + + /* + * Parameter validation + */ + if (!node) { + + /* Invalid handle */ + + ACPI_ERROR((AE_INFO, "Null NamedObj handle")); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + if (!object && (ACPI_TYPE_ANY != type)) { + + /* Null object */ + + ACPI_ERROR((AE_INFO, + "Null object, but type not ACPI_TYPE_ANY")); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) { + + /* Not a name handle */ + + ACPI_ERROR((AE_INFO, "Invalid handle %p [%s]", + node, acpi_ut_get_descriptor_name(node))); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Check if this object is already attached */ + + if (node->object == object) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Obj %p already installed in NameObj %p\n", + object, node)); + + return_ACPI_STATUS(AE_OK); + } + + /* If null object, we will just install it */ + + if (!object) { + obj_desc = NULL; + object_type = ACPI_TYPE_ANY; + } + + /* + * If the source object is a namespace Node with an attached object, + * we will use that (attached) object + */ + else if ((ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) && + ((struct acpi_namespace_node *)object)->object) { + /* + * Value passed is a name handle and that name has a + * non-null value. Use that name's value and type. + */ + obj_desc = ((struct acpi_namespace_node *)object)->object; + object_type = ((struct acpi_namespace_node *)object)->type; + } + + /* + * Otherwise, we will use the parameter object, but we must type + * it first + */ + else { + obj_desc = (union acpi_operand_object *)object; + + /* Use the given type */ + + object_type = type; + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n", + obj_desc, node, acpi_ut_get_node_name(node))); + + /* Detach an existing attached object if present */ + + if (node->object) { + acpi_ns_detach_object(node); + } + + if (obj_desc) { + /* + * Must increment the new value's reference count + * (if it is an internal object) + */ + acpi_ut_add_reference(obj_desc); + + /* + * Handle objects with multiple descriptors - walk + * to the end of the descriptor list + */ + last_obj_desc = obj_desc; + while (last_obj_desc->common.next_object) { + last_obj_desc = last_obj_desc->common.next_object; + } + + /* Install the object at the front of the object list */ + + last_obj_desc->common.next_object = node->object; + } + + node->type = (u8) object_type; + node->object = obj_desc; + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_detach_object + * + * PARAMETERS: Node - A Namespace node whose object will be detached + * + * RETURN: None. + * + * DESCRIPTION: Detach/delete an object associated with a namespace node. + * if the object is an allocated object, it is freed. + * Otherwise, the field is simply cleared. + * + ******************************************************************************/ + +void acpi_ns_detach_object(struct acpi_namespace_node *node) +{ + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_TRACE(ns_detach_object); + + obj_desc = node->object; + + if (!obj_desc || + (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA)) { + return_VOID; + } + + /* Clear the entry in all cases */ + + node->object = NULL; + if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == ACPI_DESC_TYPE_OPERAND) { + node->object = obj_desc->common.next_object; + if (node->object && + (ACPI_GET_OBJECT_TYPE(node->object) != + ACPI_TYPE_LOCAL_DATA)) { + node->object = node->object->common.next_object; + } + } + + /* Reset the node type to untyped */ + + node->type = ACPI_TYPE_ANY; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n", + node, acpi_ut_get_node_name(node), obj_desc)); + + /* Remove one reference on the object (and all subobjects) */ + + acpi_ut_remove_reference(obj_desc); + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_attached_object + * + * PARAMETERS: Node - Namespace node + * + * RETURN: Current value of the object field from the Node whose + * handle is passed + * + * DESCRIPTION: Obtain the object attached to a namespace node. + * + ******************************************************************************/ + +union acpi_operand_object *acpi_ns_get_attached_object(struct + acpi_namespace_node + *node) +{ + ACPI_FUNCTION_TRACE_PTR(ns_get_attached_object, node); + + if (!node) { + ACPI_WARNING((AE_INFO, "Null Node ptr")); + return_PTR(NULL); + } + + if (!node->object || + ((ACPI_GET_DESCRIPTOR_TYPE(node->object) != ACPI_DESC_TYPE_OPERAND) + && (ACPI_GET_DESCRIPTOR_TYPE(node->object) != + ACPI_DESC_TYPE_NAMED)) + || (ACPI_GET_OBJECT_TYPE(node->object) == ACPI_TYPE_LOCAL_DATA)) { + return_PTR(NULL); + } + + return_PTR(node->object); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_secondary_object + * + * PARAMETERS: Node - Namespace node + * + * RETURN: Current value of the object field from the Node whose + * handle is passed. + * + * DESCRIPTION: Obtain a secondary object associated with a namespace node. + * + ******************************************************************************/ + +union acpi_operand_object *acpi_ns_get_secondary_object(union + acpi_operand_object + *obj_desc) +{ + ACPI_FUNCTION_TRACE_PTR(ns_get_secondary_object, obj_desc); + + if ((!obj_desc) || + (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) || + (!obj_desc->common.next_object) || + (ACPI_GET_OBJECT_TYPE(obj_desc->common.next_object) == + ACPI_TYPE_LOCAL_DATA)) { + return_PTR(NULL); + } + + return_PTR(obj_desc->common.next_object); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_attach_data + * + * PARAMETERS: Node - Namespace node + * Handler - Handler to be associated with the data + * Data - Data to be attached + * + * RETURN: Status + * + * DESCRIPTION: Low-level attach data. Create and attach a Data object. + * + ******************************************************************************/ + +acpi_status +acpi_ns_attach_data(struct acpi_namespace_node *node, + acpi_object_handler handler, void *data) +{ + union acpi_operand_object *prev_obj_desc; + union acpi_operand_object *obj_desc; + union acpi_operand_object *data_desc; + + /* We only allow one attachment per handler */ + + prev_obj_desc = NULL; + obj_desc = node->object; + while (obj_desc) { + if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) && + (obj_desc->data.handler == handler)) { + return (AE_ALREADY_EXISTS); + } + + prev_obj_desc = obj_desc; + obj_desc = obj_desc->common.next_object; + } + + /* Create an internal object for the data */ + + data_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_DATA); + if (!data_desc) { + return (AE_NO_MEMORY); + } + + data_desc->data.handler = handler; + data_desc->data.pointer = data; + + /* Install the data object */ + + if (prev_obj_desc) { + prev_obj_desc->common.next_object = data_desc; + } else { + node->object = data_desc; + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_detach_data + * + * PARAMETERS: Node - Namespace node + * Handler - Handler associated with the data + * + * RETURN: Status + * + * DESCRIPTION: Low-level detach data. Delete the data node, but the caller + * is responsible for the actual data. + * + ******************************************************************************/ + +acpi_status +acpi_ns_detach_data(struct acpi_namespace_node * node, + acpi_object_handler handler) +{ + union acpi_operand_object *obj_desc; + union acpi_operand_object *prev_obj_desc; + + prev_obj_desc = NULL; + obj_desc = node->object; + while (obj_desc) { + if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) && + (obj_desc->data.handler == handler)) { + if (prev_obj_desc) { + prev_obj_desc->common.next_object = + obj_desc->common.next_object; + } else { + node->object = obj_desc->common.next_object; + } + + acpi_ut_remove_reference(obj_desc); + return (AE_OK); + } + + prev_obj_desc = obj_desc; + obj_desc = obj_desc->common.next_object; + } + + return (AE_NOT_FOUND); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_attached_data + * + * PARAMETERS: Node - Namespace node + * Handler - Handler associated with the data + * Data - Where the data is returned + * + * RETURN: Status + * + * DESCRIPTION: Low level interface to obtain data previously associated with + * a namespace node. + * + ******************************************************************************/ + +acpi_status +acpi_ns_get_attached_data(struct acpi_namespace_node * node, + acpi_object_handler handler, void **data) +{ + union acpi_operand_object *obj_desc; + + obj_desc = node->object; + while (obj_desc) { + if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) && + (obj_desc->data.handler == handler)) { + *data = obj_desc->data.pointer; + return (AE_OK); + } + + obj_desc = obj_desc->common.next_object; + } + + return (AE_NOT_FOUND); +} diff --git a/drivers/acpi/namespace/nsparse.c b/drivers/acpi/namespace/nsparse.c new file mode 100644 index 0000000..a82271a --- /dev/null +++ b/drivers/acpi/namespace/nsparse.c @@ -0,0 +1,203 @@ +/****************************************************************************** + * + * Module Name: nsparse - namespace interface to AML parser + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> +#include <acpi/acparser.h> +#include <acpi/acdispat.h> +#include <acpi/actables.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsparse") + +/******************************************************************************* + * + * FUNCTION: ns_one_complete_parse + * + * PARAMETERS: pass_number - 1 or 2 + * table_desc - The table to be parsed. + * + * RETURN: Status + * + * DESCRIPTION: Perform one complete parse of an ACPI/AML table. + * + ******************************************************************************/ +acpi_status +acpi_ns_one_complete_parse(u32 pass_number, + u32 table_index, + struct acpi_namespace_node *start_node) +{ + union acpi_parse_object *parse_root; + acpi_status status; + u32 aml_length; + u8 *aml_start; + struct acpi_walk_state *walk_state; + struct acpi_table_header *table; + acpi_owner_id owner_id; + + ACPI_FUNCTION_TRACE(ns_one_complete_parse); + + status = acpi_tb_get_owner_id(table_index, &owner_id); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Create and init a Root Node */ + + parse_root = acpi_ps_create_scope_op(); + if (!parse_root) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Create and initialize a new walk state */ + + walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL); + if (!walk_state) { + acpi_ps_free_op(parse_root); + return_ACPI_STATUS(AE_NO_MEMORY); + } + + status = acpi_get_table_by_index(table_index, &table); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + acpi_ps_free_op(parse_root); + return_ACPI_STATUS(status); + } + + /* Table must consist of at least a complete header */ + + if (table->length < sizeof(struct acpi_table_header)) { + status = AE_BAD_HEADER; + } else { + aml_start = (u8 *) table + sizeof(struct acpi_table_header); + aml_length = table->length - sizeof(struct acpi_table_header); + status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL, + aml_start, aml_length, NULL, + (u8) pass_number); + } + + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + /* start_node is the default location to load the table */ + + if (start_node && start_node != acpi_gbl_root_node) { + status = + acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD, + walk_state); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + } + + /* Parse the AML */ + + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "*PARSE* pass %d parse\n", + (unsigned)pass_number)); + status = acpi_ps_parse_aml(walk_state); + + cleanup: + acpi_ps_delete_parse_tree(parse_root); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_parse_table + * + * PARAMETERS: table_desc - An ACPI table descriptor for table to parse + * start_node - Where to enter the table into the namespace + * + * RETURN: Status + * + * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops + * + ******************************************************************************/ + +acpi_status +acpi_ns_parse_table(u32 table_index, struct acpi_namespace_node *start_node) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ns_parse_table); + + /* + * AML Parse, pass 1 + * + * In this pass, we load most of the namespace. Control methods + * are not parsed until later. A parse tree is not created. Instead, + * each Parser Op subtree is deleted when it is finished. This saves + * a great deal of memory, and allows a small cache of parse objects + * to service the entire parse. The second pass of the parse then + * performs another complete parse of the AML. + */ + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 1\n")); + status = + acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS1, table_index, + start_node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * AML Parse, pass 2 + * + * In this pass, we resolve forward references and other things + * that could not be completed during the first pass. + * Another complete parse of the AML is performed, but the + * overhead of this is compensated for by the fact that the + * parse objects are all cached. + */ + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 2\n")); + status = + acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS2, table_index, + start_node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/namespace/nspredef.c b/drivers/acpi/namespace/nspredef.c new file mode 100644 index 0000000..0f17cf0 --- /dev/null +++ b/drivers/acpi/namespace/nspredef.c @@ -0,0 +1,900 @@ +/****************************************************************************** + * + * Module Name: nspredef - Validation of ACPI predefined methods and objects + * $Revision: 1.1 $ + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> +#include <acpi/acpredef.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nspredef") + +/******************************************************************************* + * + * This module validates predefined ACPI objects that appear in the namespace, + * at the time they are evaluated (via acpi_evaluate_object). The purpose of this + * validation is to detect problems with BIOS-exposed predefined ACPI objects + * before the results are returned to the ACPI-related drivers. + * + * There are several areas that are validated: + * + * 1) The number of input arguments as defined by the method/object in the + * ASL is validated against the ACPI specification. + * 2) The type of the return object (if any) is validated against the ACPI + * specification. + * 3) For returned package objects, the count of package elements is + * validated, as well as the type of each package element. Nested + * packages are supported. + * + * For any problems found, a warning message is issued. + * + ******************************************************************************/ +/* Local prototypes */ +static acpi_status +acpi_ns_check_package(char *pathname, + union acpi_operand_object *return_object, + const union acpi_predefined_info *predefined); + +static acpi_status +acpi_ns_check_package_elements(char *pathname, + union acpi_operand_object **elements, + u8 type1, u32 count1, u8 type2, u32 count2); + +static acpi_status +acpi_ns_check_object_type(char *pathname, + union acpi_operand_object *return_object, + u32 expected_btypes, u32 package_index); + +static acpi_status +acpi_ns_check_reference(char *pathname, + union acpi_operand_object *return_object); + +/* + * Names for the types that can be returned by the predefined objects. + * Used for warning messages. Must be in the same order as the ACPI_RTYPEs + */ +static const char *acpi_rtype_names[] = { + "/Integer", + "/String", + "/Buffer", + "/Package", + "/Reference", +}; + +#define ACPI_NOT_PACKAGE ACPI_UINT32_MAX + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_predefined_names + * + * PARAMETERS: Node - Namespace node for the method/object + * return_object - Object returned from the evaluation of this + * method/object + * + * RETURN: Status + * + * DESCRIPTION: Check an ACPI name for a match in the predefined name list. + * + ******************************************************************************/ + +acpi_status +acpi_ns_check_predefined_names(struct acpi_namespace_node *node, + union acpi_operand_object *return_object) +{ + acpi_status status = AE_OK; + const union acpi_predefined_info *predefined; + char *pathname; + + /* Match the name for this method/object against the predefined list */ + + predefined = acpi_ns_check_for_predefined_name(node); + if (!predefined) { + + /* Name was not one of the predefined names */ + + return (AE_OK); + } + + /* Get the full pathname to the object, for use in error messages */ + + pathname = acpi_ns_get_external_pathname(node); + if (!pathname) { + pathname = ACPI_CAST_PTR(char, predefined->info.name); + } + + /* + * Check that the parameter count for this method is in accordance + * with the ACPI specification. + */ + acpi_ns_check_parameter_count(pathname, node, predefined); + + /* + * If there is no return value, check if we require a return value for + * this predefined name. Either one return value is expected, or none, + * for both methods and other objects. + * + * Exit now if there is no return object. Warning if one was expected. + */ + if (!return_object) { + if ((predefined->info.expected_btypes) && + (!(predefined->info.expected_btypes & ACPI_RTYPE_NONE))) { + ACPI_ERROR((AE_INFO, + "%s: Missing expected return value", + pathname)); + + status = AE_AML_NO_RETURN_VALUE; + } + goto exit; + } + + /* + * We have a return value, but if one wasn't expected, just exit, this is + * not a problem + * + * For example, if "Implicit return value" is enabled, methods will + * always return a value + */ + if (!predefined->info.expected_btypes) { + goto exit; + } + + /* + * Check that the type of the return object is what is expected for + * this predefined name + */ + status = acpi_ns_check_object_type(pathname, return_object, + predefined->info.expected_btypes, + ACPI_NOT_PACKAGE); + if (ACPI_FAILURE(status)) { + goto exit; + } + + /* For returned Package objects, check the type of all sub-objects */ + + if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_PACKAGE) { + status = + acpi_ns_check_package(pathname, return_object, predefined); + } + + exit: + if (pathname) { + ACPI_FREE(pathname); + } + + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_parameter_count + * + * PARAMETERS: Pathname - Full pathname to the node (for error msgs) + * Node - Namespace node for the method/object + * Predefined - Pointer to entry in predefined name table + * + * RETURN: None + * + * DESCRIPTION: Check that the declared (in ASL/AML) parameter count for a + * predefined name is what is expected (i.e., what is defined in + * the ACPI specification for this predefined name.) + * + ******************************************************************************/ + +void +acpi_ns_check_parameter_count(char *pathname, + struct acpi_namespace_node *node, + const union acpi_predefined_info *predefined) +{ + u32 param_count; + u32 required_params_current; + u32 required_params_old; + + /* + * Check that the ASL-defined parameter count is what is expected for + * this predefined name. + * + * Methods have 0-7 parameters. All other types have zero. + */ + param_count = 0; + if (node->type == ACPI_TYPE_METHOD) { + param_count = node->object->method.param_count; + } + + /* Validate parameter count - allow two different legal counts (_SCP) */ + + required_params_current = predefined->info.param_count & 0x0F; + required_params_old = predefined->info.param_count >> 4; + + if ((param_count != required_params_current) && + (param_count != required_params_old)) { + ACPI_WARNING((AE_INFO, + "%s: Parameter count mismatch - ASL declared %d, expected %d", + pathname, param_count, required_params_current)); + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_for_predefined_name + * + * PARAMETERS: Node - Namespace node for the method/object + * + * RETURN: Pointer to entry in predefined table. NULL indicates not found. + * + * DESCRIPTION: Check an object name against the predefined object list. + * + ******************************************************************************/ + +const union acpi_predefined_info *acpi_ns_check_for_predefined_name(struct + acpi_namespace_node + *node) +{ + const union acpi_predefined_info *this_name; + + /* Quick check for a predefined name, first character must be underscore */ + + if (node->name.ascii[0] != '_') { + return (NULL); + } + + /* Search info table for a predefined method/object name */ + + this_name = predefined_names; + while (this_name->info.name[0]) { + if (ACPI_COMPARE_NAME(node->name.ascii, this_name->info.name)) { + + /* Return pointer to this table entry */ + + return (this_name); + } + + /* + * Skip next entry in the table if this name returns a Package + * (next entry contains the package info) + */ + if (this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) { + this_name++; + } + + this_name++; + } + + return (NULL); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_package + * + * PARAMETERS: Pathname - Full pathname to the node (for error msgs) + * return_object - Object returned from the evaluation of a + * method or object + * Predefined - Pointer to entry in predefined name table + * + * RETURN: Status + * + * DESCRIPTION: Check a returned package object for the correct count and + * correct type of all sub-objects. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_check_package(char *pathname, + union acpi_operand_object *return_object, + const union acpi_predefined_info *predefined) +{ + const union acpi_predefined_info *package; + union acpi_operand_object *sub_package; + union acpi_operand_object **elements; + union acpi_operand_object **sub_elements; + acpi_status status; + u32 expected_count; + u32 count; + u32 i; + u32 j; + + ACPI_FUNCTION_NAME(ns_check_package); + + /* The package info for this name is in the next table entry */ + + package = predefined + 1; + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "%s Validating return Package of Type %X, Count %X\n", + pathname, package->ret_info.type, + return_object->package.count)); + + /* Extract package count and elements array */ + + elements = return_object->package.elements; + count = return_object->package.count; + + /* The package must have at least one element, else invalid */ + + if (!count) { + ACPI_WARNING((AE_INFO, + "%s: Return Package has no elements (empty)", + pathname)); + + return (AE_AML_OPERAND_VALUE); + } + + /* + * Decode the type of the expected package contents + * + * PTYPE1 packages contain no subpackages + * PTYPE2 packages contain sub-packages + */ + switch (package->ret_info.type) { + case ACPI_PTYPE1_FIXED: + + /* + * The package count is fixed and there are no sub-packages + * + * If package is too small, exit. + * If package is larger than expected, issue warning but continue + */ + expected_count = + package->ret_info.count1 + package->ret_info.count2; + if (count < expected_count) { + goto package_too_small; + } else if (count > expected_count) { + ACPI_WARNING((AE_INFO, + "%s: Return Package is larger than needed - " + "found %u, expected %u", pathname, count, + expected_count)); + } + + /* Validate all elements of the returned package */ + + status = acpi_ns_check_package_elements(pathname, elements, + package->ret_info. + object_type1, + package->ret_info. + count1, + package->ret_info. + object_type2, + package->ret_info. + count2); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + case ACPI_PTYPE1_VAR: + + /* + * The package count is variable, there are no sub-packages, and all + * elements must be of the same type + */ + for (i = 0; i < count; i++) { + status = acpi_ns_check_object_type(pathname, *elements, + package->ret_info. + object_type1, i); + if (ACPI_FAILURE(status)) { + return (status); + } + elements++; + } + break; + + case ACPI_PTYPE1_OPTION: + + /* + * The package count is variable, there are no sub-packages. There are + * a fixed number of required elements, and a variable number of + * optional elements. + * + * Check if package is at least as large as the minimum required + */ + expected_count = package->ret_info3.count; + if (count < expected_count) { + goto package_too_small; + } + + /* Variable number of sub-objects */ + + for (i = 0; i < count; i++) { + if (i < package->ret_info3.count) { + + /* These are the required package elements (0, 1, or 2) */ + + status = + acpi_ns_check_object_type(pathname, + *elements, + package-> + ret_info3. + object_type[i], + i); + if (ACPI_FAILURE(status)) { + return (status); + } + } else { + /* These are the optional package elements */ + + status = + acpi_ns_check_object_type(pathname, + *elements, + package-> + ret_info3. + tail_object_type, + i); + if (ACPI_FAILURE(status)) { + return (status); + } + } + elements++; + } + break; + + case ACPI_PTYPE2_PKG_COUNT: + + /* First element is the (Integer) count of sub-packages to follow */ + + status = acpi_ns_check_object_type(pathname, *elements, + ACPI_RTYPE_INTEGER, 0); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* + * Count cannot be larger than the parent package length, but allow it + * to be smaller. The >= accounts for the Integer above. + */ + expected_count = (u32) (*elements)->integer.value; + if (expected_count >= count) { + goto package_too_small; + } + + count = expected_count; + elements++; + + /* Now we can walk the sub-packages */ + + /*lint -fallthrough */ + + case ACPI_PTYPE2: + case ACPI_PTYPE2_FIXED: + case ACPI_PTYPE2_MIN: + case ACPI_PTYPE2_COUNT: + + /* + * These types all return a single package that consists of a variable + * number of sub-packages + */ + for (i = 0; i < count; i++) { + sub_package = *elements; + sub_elements = sub_package->package.elements; + + /* Each sub-object must be of type Package */ + + status = + acpi_ns_check_object_type(pathname, sub_package, + ACPI_RTYPE_PACKAGE, i); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* Examine the different types of sub-packages */ + + switch (package->ret_info.type) { + case ACPI_PTYPE2: + case ACPI_PTYPE2_PKG_COUNT: + + /* Each subpackage has a fixed number of elements */ + + expected_count = + package->ret_info.count1 + + package->ret_info.count2; + if (sub_package->package.count != + expected_count) { + count = sub_package->package.count; + goto package_too_small; + } + + status = + acpi_ns_check_package_elements(pathname, + sub_elements, + package-> + ret_info. + object_type1, + package-> + ret_info. + count1, + package-> + ret_info. + object_type2, + package-> + ret_info. + count2); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + case ACPI_PTYPE2_FIXED: + + /* Each sub-package has a fixed length */ + + expected_count = package->ret_info2.count; + if (sub_package->package.count < expected_count) { + count = sub_package->package.count; + goto package_too_small; + } + + /* Check the type of each sub-package element */ + + for (j = 0; j < expected_count; j++) { + status = + acpi_ns_check_object_type(pathname, + sub_elements + [j], + package-> + ret_info2. + object_type + [j], j); + if (ACPI_FAILURE(status)) { + return (status); + } + } + break; + + case ACPI_PTYPE2_MIN: + + /* Each sub-package has a variable but minimum length */ + + expected_count = package->ret_info.count1; + if (sub_package->package.count < expected_count) { + count = sub_package->package.count; + goto package_too_small; + } + + /* Check the type of each sub-package element */ + + status = + acpi_ns_check_package_elements(pathname, + sub_elements, + package-> + ret_info. + object_type1, + sub_package-> + package. + count, 0, 0); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + case ACPI_PTYPE2_COUNT: + + /* First element is the (Integer) count of elements to follow */ + + status = + acpi_ns_check_object_type(pathname, + *sub_elements, + ACPI_RTYPE_INTEGER, + 0); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* Make sure package is large enough for the Count */ + + expected_count = + (u32) (*sub_elements)->integer.value; + if (sub_package->package.count < expected_count) { + count = sub_package->package.count; + goto package_too_small; + } + + /* Check the type of each sub-package element */ + + status = + acpi_ns_check_package_elements(pathname, + (sub_elements + + 1), + package-> + ret_info. + object_type1, + (expected_count + - 1), 0, 0); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + default: + break; + } + + elements++; + } + break; + + default: + + /* Should not get here if predefined info table is correct */ + + ACPI_WARNING((AE_INFO, + "%s: Invalid internal return type in table entry: %X", + pathname, package->ret_info.type)); + + return (AE_AML_INTERNAL); + } + + return (AE_OK); + + package_too_small: + + /* Error exit for the case with an incorrect package count */ + + ACPI_WARNING((AE_INFO, "%s: Return Package is too small - " + "found %u, expected %u", pathname, count, + expected_count)); + + return (AE_AML_OPERAND_VALUE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_package_elements + * + * PARAMETERS: Pathname - Full pathname to the node (for error msgs) + * Elements - Pointer to the package elements array + * Type1 - Object type for first group + * Count1 - Count for first group + * Type2 - Object type for second group + * Count2 - Count for second group + * + * RETURN: Status + * + * DESCRIPTION: Check that all elements of a package are of the correct object + * type. Supports up to two groups of different object types. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_check_package_elements(char *pathname, + union acpi_operand_object **elements, + u8 type1, u32 count1, u8 type2, u32 count2) +{ + union acpi_operand_object **this_element = elements; + acpi_status status; + u32 i; + + /* + * Up to two groups of package elements are supported by the data + * structure. All elements in each group must be of the same type. + * The second group can have a count of zero. + */ + for (i = 0; i < count1; i++) { + status = acpi_ns_check_object_type(pathname, *this_element, + type1, i); + if (ACPI_FAILURE(status)) { + return (status); + } + this_element++; + } + + for (i = 0; i < count2; i++) { + status = acpi_ns_check_object_type(pathname, *this_element, + type2, (i + count1)); + if (ACPI_FAILURE(status)) { + return (status); + } + this_element++; + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_object_type + * + * PARAMETERS: Pathname - Full pathname to the node (for error msgs) + * return_object - Object return from the execution of this + * method/object + * expected_btypes - Bitmap of expected return type(s) + * package_index - Index of object within parent package (if + * applicable - ACPI_NOT_PACKAGE otherwise) + * + * RETURN: Status + * + * DESCRIPTION: Check the type of the return object against the expected object + * type(s). Use of Btype allows multiple expected object types. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_check_object_type(char *pathname, + union acpi_operand_object *return_object, + u32 expected_btypes, u32 package_index) +{ + acpi_status status = AE_OK; + u32 return_btype; + char type_buffer[48]; /* Room for 5 types */ + u32 this_rtype; + u32 i; + u32 j; + + /* + * If we get a NULL return_object here, it is a NULL package element, + * and this is always an error. + */ + if (!return_object) { + goto type_error_exit; + } + + /* A Namespace node should not get here, but make sure */ + + if (ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) { + ACPI_WARNING((AE_INFO, + "%s: Invalid return type - Found a Namespace node [%4.4s] type %s", + pathname, return_object->node.name.ascii, + acpi_ut_get_type_name(return_object->node.type))); + return (AE_AML_OPERAND_TYPE); + } + + /* + * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type. + * The bitmapped type allows multiple possible return types. + * + * Note, the cases below must handle all of the possible types returned + * from all of the predefined names (including elements of returned + * packages) + */ + switch (ACPI_GET_OBJECT_TYPE(return_object)) { + case ACPI_TYPE_INTEGER: + return_btype = ACPI_RTYPE_INTEGER; + break; + + case ACPI_TYPE_BUFFER: + return_btype = ACPI_RTYPE_BUFFER; + break; + + case ACPI_TYPE_STRING: + return_btype = ACPI_RTYPE_STRING; + break; + + case ACPI_TYPE_PACKAGE: + return_btype = ACPI_RTYPE_PACKAGE; + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + return_btype = ACPI_RTYPE_REFERENCE; + break; + + default: + /* Not one of the supported objects, must be incorrect */ + + goto type_error_exit; + } + + /* Is the object one of the expected types? */ + + if (!(return_btype & expected_btypes)) { + goto type_error_exit; + } + + /* For reference objects, check that the reference type is correct */ + + if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_LOCAL_REFERENCE) { + status = acpi_ns_check_reference(pathname, return_object); + } + + return (status); + + type_error_exit: + + /* Create a string with all expected types for this predefined object */ + + j = 1; + type_buffer[0] = 0; + this_rtype = ACPI_RTYPE_INTEGER; + + for (i = 0; i < ACPI_NUM_RTYPES; i++) { + + /* If one of the expected types, concatenate the name of this type */ + + if (expected_btypes & this_rtype) { + ACPI_STRCAT(type_buffer, &acpi_rtype_names[i][j]); + j = 0; /* Use name separator from now on */ + } + this_rtype <<= 1; /* Next Rtype */ + } + + if (package_index == ACPI_NOT_PACKAGE) { + ACPI_WARNING((AE_INFO, + "%s: Return type mismatch - found %s, expected %s", + pathname, + acpi_ut_get_object_type_name(return_object), + type_buffer)); + } else { + ACPI_WARNING((AE_INFO, + "%s: Return Package type mismatch at index %u - " + "found %s, expected %s", pathname, package_index, + acpi_ut_get_object_type_name(return_object), + type_buffer)); + } + + return (AE_AML_OPERAND_TYPE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_check_reference + * + * PARAMETERS: Pathname - Full pathname to the node (for error msgs) + * return_object - Object returned from the evaluation of a + * method or object + * + * RETURN: Status + * + * DESCRIPTION: Check a returned reference object for the correct reference + * type. The only reference type that can be returned from a + * predefined method is a named reference. All others are invalid. + * + ******************************************************************************/ + +static acpi_status +acpi_ns_check_reference(char *pathname, + union acpi_operand_object *return_object) +{ + + /* + * Check the reference object for the correct reference type (opcode). + * The only type of reference that can be converted to an union acpi_object is + * a reference to a named object (reference class: NAME) + */ + if (return_object->reference.class == ACPI_REFCLASS_NAME) { + return (AE_OK); + } + + ACPI_WARNING((AE_INFO, + "%s: Return type mismatch - unexpected reference object type [%s] %2.2X", + pathname, acpi_ut_get_reference_name(return_object), + return_object->reference.class)); + + return (AE_AML_OPERAND_TYPE); +} diff --git a/drivers/acpi/namespace/nssearch.c b/drivers/acpi/namespace/nssearch.c new file mode 100644 index 0000000..a9a80bf --- /dev/null +++ b/drivers/acpi/namespace/nssearch.c @@ -0,0 +1,414 @@ +/******************************************************************************* + * + * 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/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); +} diff --git a/drivers/acpi/namespace/nsutils.c b/drivers/acpi/namespace/nsutils.c new file mode 100644 index 0000000..337fb04 --- /dev/null +++ b/drivers/acpi/namespace/nsutils.c @@ -0,0 +1,996 @@ +/****************************************************************************** + * + * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing + * parents and siblings and Scope manipulation + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> +#include <acpi/amlcode.h> +#include <acpi/actables.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsutils") + +/* Local prototypes */ +static u8 acpi_ns_valid_path_separator(char sep); + +#ifdef ACPI_OBSOLETE_FUNCTIONS +acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search); +#endif + +/******************************************************************************* + * + * FUNCTION: acpi_ns_report_error + * + * PARAMETERS: module_name - Caller's module name (for error output) + * line_number - Caller's line number (for error output) + * internal_name - Name or path of the namespace node + * lookup_status - Exception code from NS lookup + * + * RETURN: None + * + * DESCRIPTION: Print warning message with full pathname + * + ******************************************************************************/ + +void +acpi_ns_report_error(const char *module_name, + u32 line_number, + const char *internal_name, acpi_status lookup_status) +{ + acpi_status status; + u32 bad_name; + char *name = NULL; + + acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number); + + if (lookup_status == AE_BAD_CHARACTER) { + + /* There is a non-ascii character in the name */ + + ACPI_MOVE_32_TO_32(&bad_name, internal_name); + acpi_os_printf("[0x%4.4X] (NON-ASCII)", bad_name); + } else { + /* Convert path to external format */ + + status = acpi_ns_externalize_name(ACPI_UINT32_MAX, + internal_name, NULL, &name); + + /* Print target name */ + + if (ACPI_SUCCESS(status)) { + acpi_os_printf("[%s]", name); + } else { + acpi_os_printf("[COULD NOT EXTERNALIZE NAME]"); + } + + if (name) { + ACPI_FREE(name); + } + } + + acpi_os_printf(" Namespace lookup failure, %s\n", + acpi_format_exception(lookup_status)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_report_method_error + * + * PARAMETERS: module_name - Caller's module name (for error output) + * line_number - Caller's line number (for error output) + * Message - Error message to use on failure + * prefix_node - Prefix relative to the path + * Path - Path to the node (optional) + * method_status - Execution status + * + * RETURN: None + * + * DESCRIPTION: Print warning message with full pathname + * + ******************************************************************************/ + +void +acpi_ns_report_method_error(const char *module_name, + u32 line_number, + const char *message, + struct acpi_namespace_node *prefix_node, + const char *path, acpi_status method_status) +{ + acpi_status status; + struct acpi_namespace_node *node = prefix_node; + + acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number); + + if (path) { + status = + acpi_ns_get_node(prefix_node, path, ACPI_NS_NO_UPSEARCH, + &node); + if (ACPI_FAILURE(status)) { + acpi_os_printf("[Could not get node by pathname]"); + } + } + + acpi_ns_print_node_pathname(node, message); + acpi_os_printf(", %s\n", acpi_format_exception(method_status)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_print_node_pathname + * + * PARAMETERS: Node - Object + * Message - Prefix message + * + * DESCRIPTION: Print an object's full namespace pathname + * Manages allocation/freeing of a pathname buffer + * + ******************************************************************************/ + +void +acpi_ns_print_node_pathname(struct acpi_namespace_node *node, + const char *message) +{ + struct acpi_buffer buffer; + acpi_status status; + + if (!node) { + acpi_os_printf("[NULL NAME]"); + return; + } + + /* Convert handle to full pathname and print it (with supplied message) */ + + buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; + + status = acpi_ns_handle_to_pathname(node, &buffer); + if (ACPI_SUCCESS(status)) { + if (message) { + acpi_os_printf("%s ", message); + } + + acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node); + ACPI_FREE(buffer.pointer); + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_valid_root_prefix + * + * PARAMETERS: Prefix - Character to be checked + * + * RETURN: TRUE if a valid prefix + * + * DESCRIPTION: Check if a character is a valid ACPI Root prefix + * + ******************************************************************************/ + +u8 acpi_ns_valid_root_prefix(char prefix) +{ + + return ((u8) (prefix == '\\')); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_valid_path_separator + * + * PARAMETERS: Sep - Character to be checked + * + * RETURN: TRUE if a valid path separator + * + * DESCRIPTION: Check if a character is a valid ACPI path separator + * + ******************************************************************************/ + +static u8 acpi_ns_valid_path_separator(char sep) +{ + + return ((u8) (sep == '.')); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_type + * + * PARAMETERS: Node - Parent Node to be examined + * + * RETURN: Type field from Node whose handle is passed + * + * DESCRIPTION: Return the type of a Namespace node + * + ******************************************************************************/ + +acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node) +{ + ACPI_FUNCTION_TRACE(ns_get_type); + + if (!node) { + ACPI_WARNING((AE_INFO, "Null Node parameter")); + return_UINT32(ACPI_TYPE_ANY); + } + + return_UINT32((acpi_object_type) node->type); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_local + * + * PARAMETERS: Type - A namespace object type + * + * RETURN: LOCAL if names must be found locally in objects of the + * passed type, 0 if enclosing scopes should be searched + * + * DESCRIPTION: Returns scope rule for the given object type. + * + ******************************************************************************/ + +u32 acpi_ns_local(acpi_object_type type) +{ + ACPI_FUNCTION_TRACE(ns_local); + + if (!acpi_ut_valid_object_type(type)) { + + /* Type code out of range */ + + ACPI_WARNING((AE_INFO, "Invalid Object Type %X", type)); + return_UINT32(ACPI_NS_NORMAL); + } + + return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_internal_name_length + * + * PARAMETERS: Info - Info struct initialized with the + * external name pointer. + * + * RETURN: None + * + * DESCRIPTION: Calculate the length of the internal (AML) namestring + * corresponding to the external (ASL) namestring. + * + ******************************************************************************/ + +void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info) +{ + const char *next_external_char; + u32 i; + + ACPI_FUNCTION_ENTRY(); + + next_external_char = info->external_name; + info->num_carats = 0; + info->num_segments = 0; + info->fully_qualified = FALSE; + + /* + * For the internal name, the required length is 4 bytes per segment, plus + * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null + * (which is not really needed, but no there's harm in putting it there) + * + * strlen() + 1 covers the first name_seg, which has no path separator + */ + if (acpi_ns_valid_root_prefix(*next_external_char)) { + info->fully_qualified = TRUE; + next_external_char++; + + /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */ + + while (acpi_ns_valid_root_prefix(*next_external_char)) { + next_external_char++; + } + } else { + /* + * Handle Carat prefixes + */ + while (*next_external_char == '^') { + info->num_carats++; + next_external_char++; + } + } + + /* + * Determine the number of ACPI name "segments" by counting the number of + * path separators within the string. Start with one segment since the + * segment count is [(# separators) + 1], and zero separators is ok. + */ + if (*next_external_char) { + info->num_segments = 1; + for (i = 0; next_external_char[i]; i++) { + if (acpi_ns_valid_path_separator(next_external_char[i])) { + info->num_segments++; + } + } + } + + info->length = (ACPI_NAME_SIZE * info->num_segments) + + 4 + info->num_carats; + + info->next_external_char = next_external_char; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_build_internal_name + * + * PARAMETERS: Info - Info struct fully initialized + * + * RETURN: Status + * + * DESCRIPTION: Construct the internal (AML) namestring + * corresponding to the external (ASL) namestring. + * + ******************************************************************************/ + +acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info) +{ + u32 num_segments = info->num_segments; + char *internal_name = info->internal_name; + const char *external_name = info->next_external_char; + char *result = NULL; + u32 i; + + ACPI_FUNCTION_TRACE(ns_build_internal_name); + + /* Setup the correct prefixes, counts, and pointers */ + + if (info->fully_qualified) { + internal_name[0] = '\\'; + + if (num_segments <= 1) { + result = &internal_name[1]; + } else if (num_segments == 2) { + internal_name[1] = AML_DUAL_NAME_PREFIX; + result = &internal_name[2]; + } else { + internal_name[1] = AML_MULTI_NAME_PREFIX_OP; + internal_name[2] = (char)num_segments; + result = &internal_name[3]; + } + } else { + /* + * Not fully qualified. + * Handle Carats first, then append the name segments + */ + i = 0; + if (info->num_carats) { + for (i = 0; i < info->num_carats; i++) { + internal_name[i] = '^'; + } + } + + if (num_segments <= 1) { + result = &internal_name[i]; + } else if (num_segments == 2) { + internal_name[i] = AML_DUAL_NAME_PREFIX; + result = &internal_name[(acpi_size) i + 1]; + } else { + internal_name[i] = AML_MULTI_NAME_PREFIX_OP; + internal_name[(acpi_size) i + 1] = (char)num_segments; + result = &internal_name[(acpi_size) i + 2]; + } + } + + /* Build the name (minus path separators) */ + + for (; num_segments; num_segments--) { + for (i = 0; i < ACPI_NAME_SIZE; i++) { + if (acpi_ns_valid_path_separator(*external_name) || + (*external_name == 0)) { + + /* Pad the segment with underscore(s) if segment is short */ + + result[i] = '_'; + } else { + /* Convert the character to uppercase and save it */ + + result[i] = + (char)ACPI_TOUPPER((int)*external_name); + external_name++; + } + } + + /* Now we must have a path separator, or the pathname is bad */ + + if (!acpi_ns_valid_path_separator(*external_name) && + (*external_name != 0)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Move on the next segment */ + + external_name++; + result += ACPI_NAME_SIZE; + } + + /* Terminate the string */ + + *result = 0; + + if (info->fully_qualified) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Returning [%p] (abs) \"\\%s\"\n", + internal_name, internal_name)); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", + internal_name, internal_name)); + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_internalize_name + * + * PARAMETERS: *external_name - External representation of name + * **Converted Name - Where to return the resulting + * internal represention of the name + * + * RETURN: Status + * + * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") + * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) + * + *******************************************************************************/ + +acpi_status +acpi_ns_internalize_name(const char *external_name, char **converted_name) +{ + char *internal_name; + struct acpi_namestring_info info; + acpi_status status; + + ACPI_FUNCTION_TRACE(ns_internalize_name); + + if ((!external_name) || (*external_name == 0) || (!converted_name)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Get the length of the new internal name */ + + info.external_name = external_name; + acpi_ns_get_internal_name_length(&info); + + /* We need a segment to store the internal name */ + + internal_name = ACPI_ALLOCATE_ZEROED(info.length); + if (!internal_name) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Build the name */ + + info.internal_name = internal_name; + status = acpi_ns_build_internal_name(&info); + if (ACPI_FAILURE(status)) { + ACPI_FREE(internal_name); + return_ACPI_STATUS(status); + } + + *converted_name = internal_name; + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_externalize_name + * + * PARAMETERS: internal_name_length - Lenth of the internal name below + * internal_name - Internal representation of name + * converted_name_length - Where the length is returned + * converted_name - Where the resulting external name + * is returned + * + * RETURN: Status + * + * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) + * to its external (printable) form (e.g. "\_PR_.CPU0") + * + ******************************************************************************/ + +acpi_status +acpi_ns_externalize_name(u32 internal_name_length, + const char *internal_name, + u32 * converted_name_length, char **converted_name) +{ + u32 names_index = 0; + u32 num_segments = 0; + u32 required_length; + u32 prefix_length = 0; + u32 i = 0; + u32 j = 0; + + ACPI_FUNCTION_TRACE(ns_externalize_name); + + 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 = (u8) + internal_name[(acpi_size) 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_ERROR((AE_INFO, "Invalid internal name")); + return_ACPI_STATUS(AE_BAD_PATHNAME); + } + + /* + * Build converted_name + */ + *converted_name = ACPI_ALLOCATE_ZEROED(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) || (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 (ACPI_CAST_PTR(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")); + 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_WARNING((AE_INFO, "Invalid Object Type %X", type)); + return_UINT32(ACPI_NS_NORMAL); + } + + return_UINT32(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_node + * + * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The + * \ (backslash) and ^ (carat) prefixes, and the + * . (period) to separate segments are supported. + * prefix_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(struct acpi_namespace_node *prefix_node, + const char *pathname, + u32 flags, struct acpi_namespace_node **return_node) +{ + union acpi_generic_state scope_info; + acpi_status status; + char *internal_path; + + ACPI_FUNCTION_TRACE_PTR(ns_get_node, pathname); + + if (!pathname) { + *return_node = prefix_node; + if (!prefix_node) { + *return_node = acpi_gbl_root_node; + } + return_ACPI_STATUS(AE_OK); + } + + /* 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 = prefix_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", + pathname, acpi_format_exception(status))); + } + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + cleanup: + ACPI_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 diff --git a/drivers/acpi/namespace/nswalk.c b/drivers/acpi/namespace/nswalk.c new file mode 100644 index 0000000..3c905ce --- /dev/null +++ b/drivers/acpi/namespace/nswalk.c @@ -0,0 +1,295 @@ +/****************************************************************************** + * + * Module Name: nswalk - Functions for walking the ACPI namespace + * + *****************************************************************************/ + +/* + * 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/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nswalk") + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_next_node + * + * PARAMETERS: Type - Type of node to be searched for + * parent_node - Parent node whose children we are + * getting + * child_node - Previous child that was found. + * The NEXT child will be returned + * + * RETURN: struct acpi_namespace_node - Pointer to the NEXT child or NULL if + * none is found. + * + * DESCRIPTION: Return the next peer node within the namespace. If Handle + * is valid, Scope is ignored. Otherwise, the first node + * within Scope is returned. + * + ******************************************************************************/ +struct acpi_namespace_node *acpi_ns_get_next_node(acpi_object_type type, struct acpi_namespace_node + *parent_node, struct acpi_namespace_node + *child_node) +{ + struct acpi_namespace_node *next_node = NULL; + + ACPI_FUNCTION_ENTRY(); + + if (!child_node) { + + /* It's really the parent's _scope_ that we want */ + + next_node = parent_node->child; + } + + else { + /* Start search at the NEXT node */ + + next_node = acpi_ns_get_next_valid_node(child_node); + } + + /* If any type is OK, we are done */ + + if (type == ACPI_TYPE_ANY) { + + /* next_node is NULL if we are at the end-of-list */ + + return (next_node); + } + + /* Must search for the node -- but within this scope only */ + + while (next_node) { + + /* If type matches, we are done */ + + if (next_node->type == type) { + return (next_node); + } + + /* Otherwise, move on to the next node */ + + next_node = acpi_ns_get_next_valid_node(next_node); + } + + /* Not found */ + + return (NULL); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_walk_namespace + * + * PARAMETERS: Type - acpi_object_type to search for + * start_node - Handle in namespace where search begins + * max_depth - Depth to which search is to reach + * Flags - Whether to unlock the NS before invoking + * the callback routine + * user_function - Called when an object of "Type" is found + * Context - Passed to user function + * return_value - from the user_function if terminated early. + * Otherwise, returns NULL. + * RETURNS: Status + * + * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, + * starting (and ending) at the node specified by start_handle. + * The user_function is called whenever a node that matches + * the type parameter is found. If the user function returns + * a non-zero value, the search is terminated immediately and this + * value is returned to the caller. + * + * The point of this procedure is to provide a generic namespace + * walk routine that can be called from multiple places to + * provide multiple services; the User Function can be tailored + * to each task, whether it is a print function, a compare + * function, etc. + * + ******************************************************************************/ + +acpi_status +acpi_ns_walk_namespace(acpi_object_type type, + acpi_handle start_node, + u32 max_depth, + u32 flags, + acpi_walk_callback user_function, + void *context, void **return_value) +{ + acpi_status status; + acpi_status mutex_status; + struct acpi_namespace_node *child_node; + struct acpi_namespace_node *parent_node; + acpi_object_type child_type; + u32 level; + + ACPI_FUNCTION_TRACE(ns_walk_namespace); + + /* Special case for the namespace Root Node */ + + if (start_node == ACPI_ROOT_OBJECT) { + start_node = acpi_gbl_root_node; + } + + /* Null child means "get first node" */ + + parent_node = start_node; + child_node = NULL; + child_type = ACPI_TYPE_ANY; + level = 1; + + /* + * Traverse the tree of nodes until we bubble back up to where we + * started. When Level is zero, the loop is done because we have + * bubbled up to (and passed) the original parent handle (start_entry) + */ + while (level > 0) { + + /* Get the next node in this scope. Null if not found */ + + status = AE_OK; + child_node = + acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, + child_node); + if (child_node) { + + /* Found next child, get the type if we are not searching for ANY */ + + if (type != ACPI_TYPE_ANY) { + child_type = child_node->type; + } + + /* + * Ignore all temporary namespace nodes (created during control + * method execution) unless told otherwise. These temporary nodes + * can cause a race condition because they can be deleted during the + * execution of the user function (if the namespace is unlocked before + * invocation of the user function.) Only the debugger namespace dump + * will examine the temporary nodes. + */ + if ((child_node->flags & ANOBJ_TEMPORARY) && + !(flags & ACPI_NS_WALK_TEMP_NODES)) { + status = AE_CTRL_DEPTH; + } + + /* Type must match requested type */ + + else if (child_type == type) { + /* + * Found a matching node, invoke the user callback function. + * Unlock the namespace if flag is set. + */ + if (flags & ACPI_NS_WALK_UNLOCK) { + mutex_status = + acpi_ut_release_mutex + (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(mutex_status)) { + return_ACPI_STATUS + (mutex_status); + } + } + + status = + user_function(child_node, level, context, + return_value); + + if (flags & ACPI_NS_WALK_UNLOCK) { + mutex_status = + acpi_ut_acquire_mutex + (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(mutex_status)) { + return_ACPI_STATUS + (mutex_status); + } + } + + switch (status) { + case AE_OK: + case AE_CTRL_DEPTH: + + /* Just keep going */ + break; + + case AE_CTRL_TERMINATE: + + /* Exit now, with OK status */ + + return_ACPI_STATUS(AE_OK); + + default: + + /* All others are valid exceptions */ + + return_ACPI_STATUS(status); + } + } + + /* + * Depth first search: Attempt to go down another level in the + * namespace if we are allowed to. Don't go any further if we have + * reached the caller specified maximum depth or if the user + * function has specified that the maximum depth has been reached. + */ + if ((level < max_depth) && (status != AE_CTRL_DEPTH)) { + if (acpi_ns_get_next_node + (ACPI_TYPE_ANY, child_node, NULL)) { + + /* There is at least one child of this node, visit it */ + + level++; + parent_node = child_node; + child_node = NULL; + } + } + } else { + /* + * No more children of this node (acpi_ns_get_next_node failed), go + * back upwards in the namespace tree to the node's parent. + */ + level--; + child_node = parent_node; + parent_node = acpi_ns_get_parent_node(parent_node); + } + } + + /* Complete walk, not terminated by user function */ + + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c new file mode 100644 index 0000000..a085cc3 --- /dev/null +++ b/drivers/acpi/namespace/nsxfeval.c @@ -0,0 +1,811 @@ +/******************************************************************************* + * + * Module Name: nsxfeval - Public interfaces to the ACPI subsystem + * ACPI Object evaluation 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/acnamesp.h> +#include <acpi/acinterp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsxfeval") + +/* Local prototypes */ +static void acpi_ns_resolve_references(struct acpi_evaluate_info *info); + +#ifdef ACPI_FUTURE_USAGE +/******************************************************************************* + * + * FUNCTION: acpi_evaluate_object_typed + * + * PARAMETERS: Handle - Object handle (optional) + * Pathname - Object pathname (optional) + * external_params - List of parameters to pass to method, + * terminated by NULL. May be NULL + * if no parameters are being passed. + * return_buffer - Where to put method's return value (if + * any). If NULL, no value is returned. + * return_type - Expected type of return object + * + * RETURN: Status + * + * DESCRIPTION: Find and evaluate the given object, passing the given + * parameters if necessary. One of "Handle" or "Pathname" must + * be valid (non-null) + * + ******************************************************************************/ + +acpi_status +acpi_evaluate_object_typed(acpi_handle handle, + acpi_string pathname, + struct acpi_object_list *external_params, + struct acpi_buffer *return_buffer, + acpi_object_type return_type) +{ + acpi_status status; + u8 must_free = FALSE; + + ACPI_FUNCTION_TRACE(acpi_evaluate_object_typed); + + /* Return buffer must be valid */ + + if (!return_buffer) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + if (return_buffer->length == ACPI_ALLOCATE_BUFFER) { + must_free = TRUE; + } + + /* Evaluate the object */ + + status = + acpi_evaluate_object(handle, pathname, external_params, + return_buffer); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Type ANY means "don't care" */ + + if (return_type == ACPI_TYPE_ANY) { + return_ACPI_STATUS(AE_OK); + } + + if (return_buffer->length == 0) { + + /* Error because caller specifically asked for a return value */ + + ACPI_ERROR((AE_INFO, "No return value")); + return_ACPI_STATUS(AE_NULL_OBJECT); + } + + /* Examine the object type returned from evaluate_object */ + + if (((union acpi_object *)return_buffer->pointer)->type == return_type) { + return_ACPI_STATUS(AE_OK); + } + + /* Return object type does not match requested type */ + + ACPI_ERROR((AE_INFO, + "Incorrect return type [%s] requested [%s]", + acpi_ut_get_type_name(((union acpi_object *)return_buffer-> + pointer)->type), + acpi_ut_get_type_name(return_type))); + + if (must_free) { + + /* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */ + + ACPI_FREE(return_buffer->pointer); + return_buffer->pointer = NULL; + } + + return_buffer->length = 0; + return_ACPI_STATUS(AE_TYPE); +} + +ACPI_EXPORT_SYMBOL(acpi_evaluate_object_typed) +#endif /* ACPI_FUTURE_USAGE */ +/******************************************************************************* + * + * FUNCTION: acpi_evaluate_object + * + * PARAMETERS: Handle - Object handle (optional) + * Pathname - Object pathname (optional) + * external_params - List of parameters to pass to method, + * terminated by NULL. May be NULL + * if no parameters are being passed. + * return_buffer - Where to put method's return value (if + * any). If NULL, no value is returned. + * + * RETURN: Status + * + * DESCRIPTION: Find and evaluate the given object, passing the given + * parameters if necessary. One of "Handle" or "Pathname" must + * be valid (non-null) + * + ******************************************************************************/ +acpi_status +acpi_evaluate_object(acpi_handle handle, + acpi_string pathname, + struct acpi_object_list *external_params, + struct acpi_buffer *return_buffer) +{ + acpi_status status; + struct acpi_evaluate_info *info; + acpi_size buffer_space_needed; + u32 i; + + ACPI_FUNCTION_TRACE(acpi_evaluate_object); + + /* Allocate and initialize the evaluation information block */ + + info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); + if (!info) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + info->pathname = pathname; + + /* Convert and validate the device handle */ + + info->prefix_node = acpi_ns_map_handle_to_node(handle); + if (!info->prefix_node) { + status = AE_BAD_PARAMETER; + goto cleanup; + } + + /* + * If there are parameters to be passed to a control method, the external + * objects must all be converted to internal objects + */ + if (external_params && external_params->count) { + /* + * Allocate a new parameter block for the internal objects + * Add 1 to count to allow for null terminated internal list + */ + info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) + external_params-> + count + + 1) * sizeof(void *)); + if (!info->parameters) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Convert each external object in the list to an internal object */ + + for (i = 0; i < external_params->count; i++) { + status = + acpi_ut_copy_eobject_to_iobject(&external_params-> + pointer[i], + &info-> + parameters[i]); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + info->parameters[external_params->count] = NULL; + } + + /* + * Three major cases: + * 1) Fully qualified pathname + * 2) No handle, not fully qualified pathname (error) + * 3) Valid handle + */ + if ((pathname) && (acpi_ns_valid_root_prefix(pathname[0]))) { + + /* The path is fully qualified, just evaluate by name */ + + info->prefix_node = NULL; + status = acpi_ns_evaluate(info); + } else if (!handle) { + /* + * A handle is optional iff a fully qualified pathname is specified. + * Since we've already handled fully qualified names above, this is + * an error + */ + if (!pathname) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Both Handle and Pathname are NULL")); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Null Handle with relative pathname [%s]", + pathname)); + } + + status = AE_BAD_PARAMETER; + } else { + /* We have a namespace a node and a possible relative path */ + + status = acpi_ns_evaluate(info); + } + + /* + * If we are expecting a return value, and all went well above, + * copy the return value to an external object. + */ + if (return_buffer) { + if (!info->return_object) { + return_buffer->length = 0; + } else { + if (ACPI_GET_DESCRIPTOR_TYPE(info->return_object) == + ACPI_DESC_TYPE_NAMED) { + /* + * If we received a NS Node as a return object, this means that + * the object we are evaluating has nothing interesting to + * return (such as a mutex, etc.) We return an error because + * these types are essentially unsupported by this interface. + * We don't check up front because this makes it easier to add + * support for various types at a later date if necessary. + */ + status = AE_TYPE; + info->return_object = NULL; /* No need to delete a NS Node */ + return_buffer->length = 0; + } + + if (ACPI_SUCCESS(status)) { + + /* Dereference Index and ref_of references */ + + acpi_ns_resolve_references(info); + + /* Get the size of the returned object */ + + status = + acpi_ut_get_object_size(info->return_object, + &buffer_space_needed); + if (ACPI_SUCCESS(status)) { + + /* Validate/Allocate/Clear caller buffer */ + + status = + acpi_ut_initialize_buffer + (return_buffer, + buffer_space_needed); + if (ACPI_FAILURE(status)) { + /* + * Caller's buffer is too small or a new one can't + * be allocated + */ + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Needed buffer size %X, %s\n", + (u32) + buffer_space_needed, + acpi_format_exception + (status))); + } else { + /* We have enough space for the object, build it */ + + status = + acpi_ut_copy_iobject_to_eobject + (info->return_object, + return_buffer); + } + } + } + } + } + + if (info->return_object) { + /* + * Delete the internal return object. NOTE: Interpreter must be + * locked to avoid race condition. + */ + acpi_ex_enter_interpreter(); + + /* Remove one reference on the return object (should delete it) */ + + acpi_ut_remove_reference(info->return_object); + acpi_ex_exit_interpreter(); + } + + cleanup: + + /* Free the input parameter list (if we created one) */ + + if (info->parameters) { + + /* Free the allocated parameter block */ + + acpi_ut_delete_internal_object_list(info->parameters); + } + + ACPI_FREE(info); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_evaluate_object) + +/******************************************************************************* + * + * FUNCTION: acpi_ns_resolve_references + * + * PARAMETERS: Info - Evaluation info block + * + * RETURN: Info->return_object is replaced with the dereferenced object + * + * DESCRIPTION: Dereference certain reference objects. Called before an + * internal return object is converted to an external union acpi_object. + * + * Performs an automatic dereference of Index and ref_of reference objects. + * These reference objects are not supported by the union acpi_object, so this is a + * last resort effort to return something useful. Also, provides compatibility + * with other ACPI implementations. + * + * NOTE: does not handle references within returned package objects or nested + * references, but this support could be added later if found to be necessary. + * + ******************************************************************************/ +static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) +{ + union acpi_operand_object *obj_desc = NULL; + struct acpi_namespace_node *node; + + /* We are interested in reference objects only */ + + if (ACPI_GET_OBJECT_TYPE(info->return_object) != + ACPI_TYPE_LOCAL_REFERENCE) { + return; + } + + /* + * Two types of references are supported - those created by Index and + * ref_of operators. A name reference (AML_NAMEPATH_OP) can be converted + * to an union acpi_object, so it is not dereferenced here. A ddb_handle + * (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to + * an union acpi_object. + */ + switch (info->return_object->reference.class) { + case ACPI_REFCLASS_INDEX: + + obj_desc = *(info->return_object->reference.where); + break; + + case ACPI_REFCLASS_REFOF: + + node = info->return_object->reference.object; + if (node) { + obj_desc = node->object; + } + break; + + default: + return; + } + + /* Replace the existing reference object */ + + if (obj_desc) { + acpi_ut_add_reference(obj_desc); + acpi_ut_remove_reference(info->return_object); + info->return_object = obj_desc; + } + + return; +} + +/******************************************************************************* + * + * FUNCTION: acpi_walk_namespace + * + * PARAMETERS: Type - acpi_object_type to search for + * start_object - Handle in namespace where search begins + * max_depth - Depth to which search is to reach + * user_function - Called when an object of "Type" is found + * Context - Passed to user function + * return_value - Location where return value of + * user_function is put if terminated early + * + * RETURNS Return value from the user_function if terminated early. + * Otherwise, returns NULL. + * + * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, + * starting (and ending) at the object specified by start_handle. + * The user_function is called whenever an object that matches + * the type parameter is found. If the user function returns + * a non-zero value, the search is terminated immediately and this + * value is returned to the caller. + * + * The point of this procedure is to provide a generic namespace + * walk routine that can be called from multiple places to + * provide multiple services; the User Function can be tailored + * to each task, whether it is a print function, a compare + * function, etc. + * + ******************************************************************************/ + +acpi_status +acpi_walk_namespace(acpi_object_type type, + acpi_handle start_object, + u32 max_depth, + acpi_walk_callback user_function, + void *context, void **return_value) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_walk_namespace); + + /* Parameter validation */ + + if ((type > ACPI_TYPE_LOCAL_MAX) || (!max_depth) || (!user_function)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* + * Lock the namespace around the walk. + * The namespace will be unlocked/locked around each call + * to the user function - since this function + * must be allowed to make Acpi calls itself. + */ + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + status = acpi_ns_walk_namespace(type, start_object, max_depth, + ACPI_NS_WALK_UNLOCK, + user_function, context, return_value); + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_walk_namespace) + +/******************************************************************************* + * + * FUNCTION: acpi_ns_get_device_callback + * + * PARAMETERS: Callback from acpi_get_device + * + * RETURN: Status + * + * DESCRIPTION: Takes callbacks from walk_namespace and filters out all non- + * present devices, or if they specified a HID, it filters based + * on that. + * + ******************************************************************************/ +static acpi_status +acpi_ns_get_device_callback(acpi_handle obj_handle, + u32 nesting_level, + void *context, void **return_value) +{ + struct acpi_get_devices_info *info = context; + acpi_status status; + struct acpi_namespace_node *node; + u32 flags; + struct acpica_device_id hid; + struct acpi_compatible_id_list *cid; + u32 i; + int found; + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return (status); + } + + node = acpi_ns_map_handle_to_node(obj_handle); + status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return (status); + } + + if (!node) { + return (AE_BAD_PARAMETER); + } + + /* Run _STA to determine if device is present */ + + status = acpi_ut_execute_STA(node, &flags); + if (ACPI_FAILURE(status)) { + return (AE_CTRL_DEPTH); + } + + if (!(flags & ACPI_STA_DEVICE_PRESENT) && + !(flags & ACPI_STA_DEVICE_FUNCTIONING)) { + /* + * Don't examine the children of the device only when the + * device is neither present nor functional. See ACPI spec, + * description of _STA for more information. + */ + return (AE_CTRL_DEPTH); + } + + /* Filter based on device HID & CID */ + + if (info->hid != NULL) { + status = acpi_ut_execute_HID(node, &hid); + if (status == AE_NOT_FOUND) { + return (AE_OK); + } else if (ACPI_FAILURE(status)) { + return (AE_CTRL_DEPTH); + } + + if (ACPI_STRNCMP(hid.value, info->hid, sizeof(hid.value)) != 0) { + + /* Get the list of Compatible IDs */ + + status = acpi_ut_execute_CID(node, &cid); + if (status == AE_NOT_FOUND) { + return (AE_OK); + } else if (ACPI_FAILURE(status)) { + return (AE_CTRL_DEPTH); + } + + /* Walk the CID list */ + + found = 0; + for (i = 0; i < cid->count; i++) { + if (ACPI_STRNCMP(cid->id[i].value, info->hid, + sizeof(struct + acpi_compatible_id)) == + 0) { + found = 1; + break; + } + } + ACPI_FREE(cid); + if (!found) + return (AE_OK); + } + } + + status = info->user_function(obj_handle, nesting_level, info->context, + return_value); + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_get_devices + * + * PARAMETERS: HID - HID to search for. Can be NULL. + * user_function - Called when a matching object is found + * Context - Passed to user function + * return_value - Location where return value of + * user_function is put if terminated early + * + * RETURNS Return value from the user_function if terminated early. + * Otherwise, returns NULL. + * + * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, + * starting (and ending) at the object specified by start_handle. + * The user_function is called whenever an object of type + * Device is found. If the user function returns + * a non-zero value, the search is terminated immediately and this + * value is returned to the caller. + * + * This is a wrapper for walk_namespace, but the callback performs + * additional filtering. Please see acpi_ns_get_device_callback. + * + ******************************************************************************/ + +acpi_status +acpi_get_devices(const char *HID, + acpi_walk_callback user_function, + void *context, void **return_value) +{ + acpi_status status; + struct acpi_get_devices_info info; + + ACPI_FUNCTION_TRACE(acpi_get_devices); + + /* Parameter validation */ + + if (!user_function) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* + * We're going to call their callback from OUR callback, so we need + * to know what it is, and their context parameter. + */ + info.hid = HID; + info.context = context; + info.user_function = user_function; + + /* + * Lock the namespace around the walk. + * The namespace will be unlocked/locked around each call + * to the user function - since this function + * must be allowed to make Acpi calls itself. + */ + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, + acpi_ns_get_device_callback, &info, + return_value); + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_get_devices) + +/******************************************************************************* + * + * FUNCTION: acpi_attach_data + * + * PARAMETERS: obj_handle - Namespace node + * Handler - Handler for this attachment + * Data - Pointer to data to be attached + * + * RETURN: Status + * + * DESCRIPTION: Attach arbitrary data and handler to a namespace node. + * + ******************************************************************************/ +acpi_status +acpi_attach_data(acpi_handle obj_handle, + acpi_object_handler handler, void *data) +{ + struct acpi_namespace_node *node; + acpi_status status; + + /* Parameter validation */ + + if (!obj_handle || !handler || !data) { + 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(obj_handle); + if (!node) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + status = acpi_ns_attach_data(node, handler, data); + + unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_attach_data) + +/******************************************************************************* + * + * FUNCTION: acpi_detach_data + * + * PARAMETERS: obj_handle - Namespace node handle + * Handler - Handler used in call to acpi_attach_data + * + * RETURN: Status + * + * DESCRIPTION: Remove data that was previously attached to a node. + * + ******************************************************************************/ +acpi_status +acpi_detach_data(acpi_handle obj_handle, acpi_object_handler handler) +{ + struct acpi_namespace_node *node; + acpi_status status; + + /* Parameter validation */ + + if (!obj_handle || !handler) { + 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(obj_handle); + if (!node) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + status = acpi_ns_detach_data(node, handler); + + unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_detach_data) + +/******************************************************************************* + * + * FUNCTION: acpi_get_data + * + * PARAMETERS: obj_handle - Namespace node + * Handler - Handler used in call to attach_data + * Data - Where the data is returned + * + * RETURN: Status + * + * DESCRIPTION: Retrieve data that was previously attached to a namespace node. + * + ******************************************************************************/ +acpi_status +acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data) +{ + struct acpi_namespace_node *node; + acpi_status status; + + /* Parameter validation */ + + if (!obj_handle || !handler || !data) { + 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(obj_handle); + if (!node) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + status = acpi_ns_get_attached_data(node, handler, data); + + unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_get_data) diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c new file mode 100644 index 0000000..5efa4e7 --- /dev/null +++ b/drivers/acpi/namespace/nsxfname.c @@ -0,0 +1,359 @@ +/****************************************************************************** + * + * Module Name: nsxfname - Public interfaces to the ACPI subsystem + * ACPI Namespace 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/acnamesp.h> + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nsxfname") + +/****************************************************************************** + * + * FUNCTION: acpi_get_handle + * + * PARAMETERS: Parent - Object to search under (search scope). + * Pathname - Pointer to an asciiz string containing the + * name + * ret_handle - Where the return handle is returned + * + * RETURN: Status + * + * DESCRIPTION: This routine will search for a caller specified name in the + * name space. The caller can restrict the search region by + * specifying a non NULL parent. The parent value is itself a + * namespace handle. + * + ******************************************************************************/ +acpi_status +acpi_get_handle(acpi_handle parent, + acpi_string pathname, acpi_handle * ret_handle) +{ + acpi_status status; + struct acpi_namespace_node *node = NULL; + struct acpi_namespace_node *prefix_node = NULL; + + ACPI_FUNCTION_ENTRY(); + + /* Parameter Validation */ + + if (!ret_handle || !pathname) { + return (AE_BAD_PARAMETER); + } + + /* Convert a parent handle to a prefix node */ + + if (parent) { + prefix_node = acpi_ns_map_handle_to_node(parent); + if (!prefix_node) { + return (AE_BAD_PARAMETER); + } + } + + /* + * Valid cases are: + * 1) Fully qualified pathname + * 2) Parent + Relative pathname + * + * Error for <null Parent + relative path> + */ + if (acpi_ns_valid_root_prefix(pathname[0])) { + + /* Pathname is fully qualified (starts with '\') */ + + /* Special case for root-only, since we can't search for it */ + + if (!ACPI_STRCMP(pathname, ACPI_NS_ROOT_PATH)) { + *ret_handle = + acpi_ns_convert_entry_to_handle(acpi_gbl_root_node); + return (AE_OK); + } + } else if (!prefix_node) { + + /* Relative path with null prefix is disallowed */ + + return (AE_BAD_PARAMETER); + } + + /* Find the Node and convert to a handle */ + + status = + acpi_ns_get_node(prefix_node, pathname, ACPI_NS_NO_UPSEARCH, &node); + if (ACPI_SUCCESS(status)) { + *ret_handle = acpi_ns_convert_entry_to_handle(node); + } + + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_get_handle) + +/****************************************************************************** + * + * FUNCTION: acpi_get_name + * + * PARAMETERS: Handle - Handle to be converted to a pathname + * name_type - Full pathname or single segment + * Buffer - Buffer for returned path + * + * RETURN: Pointer to a string containing the fully qualified Name. + * + * DESCRIPTION: This routine returns the fully qualified name associated with + * the Handle parameter. This and the acpi_pathname_to_handle are + * complementary functions. + * + ******************************************************************************/ +acpi_status +acpi_get_name(acpi_handle handle, u32 name_type, struct acpi_buffer * buffer) +{ + acpi_status status; + struct acpi_namespace_node *node; + + /* Parameter validation */ + + if (name_type > ACPI_NAME_TYPE_MAX) { + return (AE_BAD_PARAMETER); + } + + status = acpi_ut_validate_buffer(buffer); + if (ACPI_FAILURE(status)) { + return (status); + } + + if (name_type == ACPI_FULL_PATHNAME) { + + /* Get the full pathname (From the namespace root) */ + + status = acpi_ns_handle_to_pathname(handle, buffer); + return (status); + } + + /* + * Wants the single segment ACPI name. + * Validate handle and convert to a namespace Node + */ + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return (status); + } + + node = acpi_ns_map_handle_to_node(handle); + if (!node) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer(buffer, ACPI_PATH_SEGMENT_LENGTH); + if (ACPI_FAILURE(status)) { + goto unlock_and_exit; + } + + /* Just copy the ACPI name from the Node and zero terminate it */ + + ACPI_STRNCPY(buffer->pointer, acpi_ut_get_node_name(node), + ACPI_NAME_SIZE); + ((char *)buffer->pointer)[ACPI_NAME_SIZE] = 0; + status = AE_OK; + + unlock_and_exit: + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_get_name) + +/****************************************************************************** + * + * FUNCTION: acpi_get_object_info + * + * PARAMETERS: Handle - Object Handle + * Buffer - Where the info is returned + * + * RETURN: Status + * + * DESCRIPTION: Returns information about an object as gleaned from the + * namespace node and possibly by running several standard + * control methods (Such as in the case of a device.) + * + ******************************************************************************/ +acpi_status +acpi_get_object_info(acpi_handle handle, struct acpi_buffer * buffer) +{ + acpi_status status; + struct acpi_namespace_node *node; + struct acpi_device_info *info; + struct acpi_device_info *return_info; + struct acpi_compatible_id_list *cid_list = NULL; + acpi_size size; + + /* Parameter validation */ + + if (!handle || !buffer) { + return (AE_BAD_PARAMETER); + } + + status = acpi_ut_validate_buffer(buffer); + if (ACPI_FAILURE(status)) { + return (status); + } + + info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_device_info)); + if (!info) { + return (AE_NO_MEMORY); + } + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + node = acpi_ns_map_handle_to_node(handle); + if (!node) { + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + status = AE_BAD_PARAMETER; + goto cleanup; + } + + /* Init return structure */ + + size = sizeof(struct acpi_device_info); + + info->type = node->type; + info->name = node->name.integer; + info->valid = 0; + + if (node->type == ACPI_TYPE_METHOD) { + info->param_count = node->object->method.param_count; + } + + status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* If not a device, we are all done */ + + if (info->type == ACPI_TYPE_DEVICE) { + /* + * Get extra info for ACPI Devices objects only: + * Run the Device _HID, _UID, _CID, _STA, _ADR and _sx_d methods. + * + * Note: none of these methods are required, so they may or may + * not be present for this device. The Info->Valid bitfield is used + * to indicate which methods were found and ran successfully. + */ + + /* Execute the Device._HID method */ + + status = acpi_ut_execute_HID(node, &info->hardware_id); + if (ACPI_SUCCESS(status)) { + info->valid |= ACPI_VALID_HID; + } + + /* Execute the Device._UID method */ + + status = acpi_ut_execute_UID(node, &info->unique_id); + if (ACPI_SUCCESS(status)) { + info->valid |= ACPI_VALID_UID; + } + + /* Execute the Device._CID method */ + + status = acpi_ut_execute_CID(node, &cid_list); + if (ACPI_SUCCESS(status)) { + size += cid_list->size; + info->valid |= ACPI_VALID_CID; + } + + /* Execute the Device._STA method */ + + status = acpi_ut_execute_STA(node, &info->current_status); + if (ACPI_SUCCESS(status)) { + info->valid |= ACPI_VALID_STA; + } + + /* Execute the Device._ADR method */ + + status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, node, + &info->address); + if (ACPI_SUCCESS(status)) { + info->valid |= ACPI_VALID_ADR; + } + + /* Execute the Device._sx_d methods */ + + status = acpi_ut_execute_sxds(node, info->highest_dstates); + if (ACPI_SUCCESS(status)) { + info->valid |= ACPI_VALID_SXDS; + } + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer(buffer, size); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* Populate the return buffer */ + + return_info = buffer->pointer; + ACPI_MEMCPY(return_info, info, sizeof(struct acpi_device_info)); + + if (cid_list) { + ACPI_MEMCPY(&return_info->compatibility_id, cid_list, + cid_list->size); + } + + cleanup: + ACPI_FREE(info); + if (cid_list) { + ACPI_FREE(cid_list); + } + return (status); +} + +ACPI_EXPORT_SYMBOL(acpi_get_object_info) diff --git a/drivers/acpi/namespace/nsxfobj.c b/drivers/acpi/namespace/nsxfobj.c new file mode 100644 index 0000000..2b375ee --- /dev/null +++ b/drivers/acpi/namespace/nsxfobj.c @@ -0,0 +1,286 @@ +/******************************************************************************* + * + * 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/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) |
