1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
697 lines
19 KiB
C
697 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: uteval - Object evaluation
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("uteval")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_osi_implementation
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Implementation of _OSI predefined control method
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* Supported = _OSI (String)
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*
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******************************************************************************/
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acpi_status
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acpi_ut_osi_implementation (
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *string_desc;
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union acpi_operand_object *return_desc;
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acpi_native_uint i;
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ACPI_FUNCTION_TRACE ("ut_osi_implementation");
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/* Validate the string input argument */
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string_desc = walk_state->arguments[0].object;
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if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) {
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Create a return object (Default value = 0) */
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return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
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if (!return_desc) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Compare input string to table of supported strings */
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for (i = 0; i < ACPI_NUM_OSI_STRINGS; i++) {
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if (!ACPI_STRCMP (string_desc->string.pointer,
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(char *) acpi_gbl_valid_osi_strings[i])) {
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/* This string is supported */
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return_desc->integer.value = 0xFFFFFFFF;
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break;
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}
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}
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walk_state->return_desc = return_desc;
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return_ACPI_STATUS (AE_CTRL_TERMINATE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_evaluate_object
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*
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* PARAMETERS: prefix_node - Starting node
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* Path - Path to object from starting node
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* expected_return_types - Bitmap of allowed return types
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* return_desc - Where a return value is stored
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluates a namespace object and verifies the type of the
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* return object. Common code that simplifies accessing objects
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* that have required return objects of fixed types.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_evaluate_object (
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struct acpi_namespace_node *prefix_node,
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char *path,
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u32 expected_return_btypes,
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union acpi_operand_object **return_desc)
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{
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struct acpi_parameter_info info;
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acpi_status status;
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u32 return_btype;
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ACPI_FUNCTION_TRACE ("ut_evaluate_object");
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info.node = prefix_node;
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info.parameters = NULL;
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info.parameter_type = ACPI_PARAM_ARGS;
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/* Evaluate the object/method */
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status = acpi_ns_evaluate_relative (path, &info);
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if (ACPI_FAILURE (status)) {
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if (status == AE_NOT_FOUND) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
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acpi_ut_get_node_name (prefix_node), path));
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}
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else {
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ACPI_REPORT_METHOD_ERROR ("Method execution failed",
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prefix_node, path, status);
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}
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return_ACPI_STATUS (status);
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}
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/* Did we get a return object? */
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if (!info.return_object) {
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if (expected_return_btypes) {
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ACPI_REPORT_METHOD_ERROR ("No object was returned from",
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prefix_node, path, AE_NOT_EXIST);
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/* Map the return object type to the bitmapped type */
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switch (ACPI_GET_OBJECT_TYPE (info.return_object)) {
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case ACPI_TYPE_INTEGER:
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return_btype = ACPI_BTYPE_INTEGER;
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break;
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case ACPI_TYPE_BUFFER:
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return_btype = ACPI_BTYPE_BUFFER;
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break;
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case ACPI_TYPE_STRING:
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return_btype = ACPI_BTYPE_STRING;
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break;
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case ACPI_TYPE_PACKAGE:
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return_btype = ACPI_BTYPE_PACKAGE;
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break;
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default:
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return_btype = 0;
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break;
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}
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if ((acpi_gbl_enable_interpreter_slack) &&
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(!expected_return_btypes)) {
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/*
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* We received a return object, but one was not expected. This can
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* happen frequently if the "implicit return" feature is enabled.
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* Just delete the return object and return AE_OK.
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*/
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acpi_ut_remove_reference (info.return_object);
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return_ACPI_STATUS (AE_OK);
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}
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/* Is the return object one of the expected types? */
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if (!(expected_return_btypes & return_btype)) {
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ACPI_REPORT_METHOD_ERROR ("Return object type is incorrect",
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prefix_node, path, AE_TYPE);
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Type returned from %s was incorrect: %s, expected Btypes: %X\n",
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path, acpi_ut_get_object_type_name (info.return_object),
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expected_return_btypes));
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/* On error exit, we must delete the return object */
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acpi_ut_remove_reference (info.return_object);
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Object type is OK, return it */
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*return_desc = info.return_object;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_evaluate_numeric_object
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*
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* PARAMETERS: *object_name - Object name to be evaluated
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* device_node - Node for the device
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* *Address - Where the value is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluates a numeric namespace object for a selected device
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* and stores result in *Address.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_evaluate_numeric_object (
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char *object_name,
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struct acpi_namespace_node *device_node,
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acpi_integer *address)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ut_evaluate_numeric_object");
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status = acpi_ut_evaluate_object (device_node, object_name,
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ACPI_BTYPE_INTEGER, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Get the returned Integer */
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*address = obj_desc->integer.value;
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/* On exit, we must delete the return object */
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_copy_id_string
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*
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* PARAMETERS: Destination - Where to copy the string
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* Source - Source string
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* max_length - Length of the destination buffer
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*
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* RETURN: None
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*
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* DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods.
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* Performs removal of a leading asterisk if present -- workaround
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* for a known issue on a bunch of machines.
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*
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******************************************************************************/
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static void
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acpi_ut_copy_id_string (
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char *destination,
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char *source,
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acpi_size max_length)
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{
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/*
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* Workaround for ID strings that have a leading asterisk. This construct
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* is not allowed by the ACPI specification (ID strings must be
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* alphanumeric), but enough existing machines have this embedded in their
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* ID strings that the following code is useful.
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*/
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if (*source == '*') {
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source++;
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}
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/* Do the actual copy */
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ACPI_STRNCPY (destination, source, max_length);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_HID
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*
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* PARAMETERS: device_node - Node for the device
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* *Hid - Where the HID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _HID control method that returns the hardware
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* ID of the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_HID (
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struct acpi_namespace_node *device_node,
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struct acpi_device_id *hid)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ut_execute_HID");
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status = acpi_ut_evaluate_object (device_node, METHOD_NAME__HID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
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/* Convert the Numeric HID to string */
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acpi_ex_eisa_id_to_string ((u32) obj_desc->integer.value, hid->value);
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}
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else {
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/* Copy the String HID from the returned object */
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acpi_ut_copy_id_string (hid->value, obj_desc->string.pointer,
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sizeof (hid->value));
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}
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/* On exit, we must delete the return object */
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_translate_one_cid
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*
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* PARAMETERS: obj_desc - _CID object, must be integer or string
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* one_cid - Where the CID string is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return a numeric or string _CID value as a string.
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* (Compatible ID)
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*
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* NOTE: Assumes a maximum _CID string length of
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* ACPI_MAX_CID_LENGTH.
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*
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******************************************************************************/
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static acpi_status
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acpi_ut_translate_one_cid (
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union acpi_operand_object *obj_desc,
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struct acpi_compatible_id *one_cid)
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{
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switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
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case ACPI_TYPE_INTEGER:
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/* Convert the Numeric CID to string */
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acpi_ex_eisa_id_to_string ((u32) obj_desc->integer.value, one_cid->value);
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return (AE_OK);
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case ACPI_TYPE_STRING:
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if (obj_desc->string.length > ACPI_MAX_CID_LENGTH) {
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return (AE_AML_STRING_LIMIT);
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}
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/* Copy the String CID from the returned object */
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acpi_ut_copy_id_string (one_cid->value, obj_desc->string.pointer,
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ACPI_MAX_CID_LENGTH);
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return (AE_OK);
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default:
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return (AE_TYPE);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_CID
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*
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* PARAMETERS: device_node - Node for the device
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* *Cid - Where the CID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _CID control method that returns one or more
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* compatible hardware IDs for the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_CID (
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struct acpi_namespace_node *device_node,
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struct acpi_compatible_id_list **return_cid_list)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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u32 count;
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u32 size;
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struct acpi_compatible_id_list *cid_list;
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acpi_native_uint i;
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ACPI_FUNCTION_TRACE ("ut_execute_CID");
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/* Evaluate the _CID method for this device */
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status = acpi_ut_evaluate_object (device_node, METHOD_NAME__CID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
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&obj_desc);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Get the number of _CIDs returned */
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count = 1;
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_PACKAGE) {
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count = obj_desc->package.count;
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}
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/* Allocate a worst-case buffer for the _CIDs */
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size = (((count - 1) * sizeof (struct acpi_compatible_id)) +
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sizeof (struct acpi_compatible_id_list));
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cid_list = ACPI_MEM_CALLOCATE ((acpi_size) size);
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if (!cid_list) {
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Init CID list */
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cid_list->count = count;
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cid_list->size = size;
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/*
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* A _CID can return either a single compatible ID or a package of compatible
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* IDs. Each compatible ID can be one of the following:
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* -- Number (32 bit compressed EISA ID) or
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* -- String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss").
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*/
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/* The _CID object can be either a single CID or a package (list) of CIDs */
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if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_PACKAGE) {
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/* Translate each package element */
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for (i = 0; i < count; i++) {
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status = acpi_ut_translate_one_cid (obj_desc->package.elements[i],
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&cid_list->id[i]);
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if (ACPI_FAILURE (status)) {
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break;
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}
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}
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}
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else {
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/* Only one CID, translate to a string */
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status = acpi_ut_translate_one_cid (obj_desc, cid_list->id);
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}
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/* Cleanup on error */
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if (ACPI_FAILURE (status)) {
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ACPI_MEM_FREE (cid_list);
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}
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else {
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*return_cid_list = cid_list;
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}
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/* On exit, we must delete the _CID return object */
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acpi_ut_remove_reference (obj_desc);
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_execute_UID
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*
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* PARAMETERS: device_node - Node for the device
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* *Uid - Where the UID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes the _UID control method that returns the hardware
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* ID of the device.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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acpi_status
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acpi_ut_execute_UID (
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struct acpi_namespace_node *device_node,
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struct acpi_device_id *uid)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ut_execute_UID");
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status = acpi_ut_evaluate_object (device_node, METHOD_NAME__UID,
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ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
|
|
/* Convert the Numeric UID to string */
|
|
|
|
acpi_ex_unsigned_integer_to_string (obj_desc->integer.value, uid->value);
|
|
}
|
|
else {
|
|
/* Copy the String UID from the returned object */
|
|
|
|
acpi_ut_copy_id_string (uid->value, obj_desc->string.pointer,
|
|
sizeof (uid->value));
|
|
}
|
|
|
|
/* On exit, we must delete the return object */
|
|
|
|
acpi_ut_remove_reference (obj_desc);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_execute_STA
|
|
*
|
|
* PARAMETERS: device_node - Node for the device
|
|
* *Flags - Where the status flags are returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Executes _STA for selected device and stores results in
|
|
* *Flags.
|
|
*
|
|
* NOTE: Internal function, no parameter validation
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_execute_STA (
|
|
struct acpi_namespace_node *device_node,
|
|
u32 *flags)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ut_execute_STA");
|
|
|
|
|
|
status = acpi_ut_evaluate_object (device_node, METHOD_NAME__STA,
|
|
ACPI_BTYPE_INTEGER, &obj_desc);
|
|
if (ACPI_FAILURE (status)) {
|
|
if (AE_NOT_FOUND == status) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"_STA on %4.4s was not found, assuming device is present\n",
|
|
acpi_ut_get_node_name (device_node)));
|
|
|
|
*flags = 0x0F;
|
|
status = AE_OK;
|
|
}
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Extract the status flags */
|
|
|
|
*flags = (u32) obj_desc->integer.value;
|
|
|
|
/* On exit, we must delete the return object */
|
|
|
|
acpi_ut_remove_reference (obj_desc);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_execute_Sxds
|
|
*
|
|
* PARAMETERS: device_node - Node for the device
|
|
* *Flags - Where the status flags are returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Executes _STA for selected device and stores results in
|
|
* *Flags.
|
|
*
|
|
* NOTE: Internal function, no parameter validation
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_execute_sxds (
|
|
struct acpi_namespace_node *device_node,
|
|
u8 *highest)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
u32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ut_execute_Sxds");
|
|
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
highest[i] = 0xFF;
|
|
status = acpi_ut_evaluate_object (device_node,
|
|
(char *) acpi_gbl_highest_dstate_names[i],
|
|
ACPI_BTYPE_INTEGER, &obj_desc);
|
|
if (ACPI_FAILURE (status)) {
|
|
if (status != AE_NOT_FOUND) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"%s on Device %4.4s, %s\n",
|
|
(char *) acpi_gbl_highest_dstate_names[i],
|
|
acpi_ut_get_node_name (device_node),
|
|
acpi_format_exception (status)));
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
else {
|
|
/* Extract the Dstate value */
|
|
|
|
highest[i] = (u8) obj_desc->integer.value;
|
|
|
|
/* Delete the return object */
|
|
|
|
acpi_ut_remove_reference (obj_desc);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|