diff options
Diffstat (limited to 'drivers/acpi/namespace/nsxfeval.c')
| -rw-r--r-- | drivers/acpi/namespace/nsxfeval.c | 811 |
1 files changed, 0 insertions, 811 deletions
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c deleted file mode 100644 index a085cc39c055..000000000000 --- a/drivers/acpi/namespace/nsxfeval.c +++ /dev/null @@ -1,811 +0,0 @@ -/******************************************************************************* - * - * 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) |