diff options
Diffstat (limited to 'drivers/acpi/namespace/nsxfeval.c')
| -rw-r--r-- | drivers/acpi/namespace/nsxfeval.c | 730 |
1 files changed, 0 insertions, 730 deletions
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c deleted file mode 100644 index c07b046659f..00000000000 --- a/drivers/acpi/namespace/nsxfeval.c +++ /dev/null @@ -1,730 +0,0 @@ -/******************************************************************************* - * - * Module Name: nsxfeval - Public interfaces to the ACPI subsystem - * ACPI Object evaluation interfaces - * - ******************************************************************************/ - -/* - * Copyright (C) 2000 - 2005, R. Byron Moore - * 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 <linux/module.h> - -#include <acpi/acpi.h> -#include <acpi/acnamesp.h> -#include <acpi/acinterp.h> - -#define _COMPONENT ACPI_NAMESPACE -ACPI_MODULE_NAME("nsxfeval") - -/******************************************************************************* - * - * 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) - * - ******************************************************************************/ -#ifdef ACPI_FUTURE_USAGE -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_DEBUG_PRINT((ACPI_DB_ERROR, "No return value\n")); - - 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_DEBUG_PRINT((ACPI_DB_ERROR, - "Incorrect return type [%s] requested [%s]\n", - 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_os_free(return_buffer->pointer); - return_buffer->pointer = NULL; - } - - return_buffer->length = 0; - return_ACPI_STATUS(AE_TYPE); -} -#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; - acpi_status status2; - struct acpi_parameter_info info; - acpi_size buffer_space_needed; - u32 i; - - ACPI_FUNCTION_TRACE("acpi_evaluate_object"); - - info.node = handle; - info.parameters = NULL; - info.return_object = NULL; - info.parameter_type = ACPI_PARAM_ARGS; - - /* - * If there are parameters to be passed to the object - * (which must be a control method), the external objects - * must 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_MEM_CALLOCATE(((acpi_size) - external_params->count + - 1) * sizeof(void *)); - if (!info.parameters) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* - * 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)) { - acpi_ut_delete_internal_object_list(info. - parameters); - return_ACPI_STATUS(status); - } - } - 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 - */ - status = acpi_ns_evaluate_by_name(pathname, &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_ERROR, - "Both Handle and Pathname are NULL\n")); - } else { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Handle is NULL and Pathname is relative\n")); - } - - status = AE_BAD_PARAMETER; - } else { - /* - * We get here if we have a handle -- and if we have a - * pathname it is relative. The handle will be validated - * in the lower procedures - */ - if (!pathname) { - /* - * The null pathname case means the handle is for - * the actual object to be evaluated - */ - status = acpi_ns_evaluate_by_handle(&info); - } else { - /* - * Both a Handle and a relative Pathname - */ - status = acpi_ns_evaluate_relative(pathname, &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)) { - /* - * Find out how large a buffer is needed - * to contain 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. - */ - status2 = acpi_ex_enter_interpreter(); - if (ACPI_SUCCESS(status2)) { - /* - * Delete the internal return object. (Or at least - * decrement the reference count by one) - */ - acpi_ut_remove_reference(info.return_object); - acpi_ex_exit_interpreter(); - } - } - - /* - * 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); - } - - return_ACPI_STATUS(status); -} - -EXPORT_SYMBOL(acpi_evaluate_object); - -/******************************************************************************* - * - * 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_EXTERNAL_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); -} - -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 acpi_device_id hid; - struct acpi_compatible_id_list *cid; - acpi_native_uint i; - - 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 & 0x01)) { - /* Don't return at the device or children of the device if not there */ - - 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 */ - - for (i = 0; i < cid->count; i++) { - if (ACPI_STRNCMP(cid->id[i].value, info->hid, - sizeof(struct - acpi_compatible_id)) != - 0) { - ACPI_MEM_FREE(cid); - return (AE_OK); - } - } - ACPI_MEM_FREE(cid); - } - } - - 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_get_device_callback. - * - ******************************************************************************/ - -acpi_status -acpi_get_devices(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.context = context; - info.user_function = user_function; - info.hid = HID; - - /* - * 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); -} - -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); -} - -/******************************************************************************* - * - * 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); -} - -/******************************************************************************* - * - * 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); -} |