486 lines
14 KiB
C
486 lines
14 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 - 2008, Intel Corp.
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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 "accommon.h"
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#include "acnamesp.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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* Strings supported by the _OSI predefined (internal) method.
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*
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* March 2009: Removed "Linux" as this host no longer wants to respond true
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* for this string. Basically, the only safe OS strings are windows-related
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* and in many or most cases represent the only test path within the
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* BIOS-provided ASL code.
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*
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* The second element of each entry is used to track the newest version of
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* Windows that the BIOS has requested.
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*/
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static struct acpi_interface_info acpi_interfaces_supported[] = {
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/* Operating System Vendor Strings */
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{"Windows 2000", ACPI_OSI_WIN_2000}, /* Windows 2000 */
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{"Windows 2001", ACPI_OSI_WIN_XP}, /* Windows XP */
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{"Windows 2001 SP1", ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
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{"Windows 2001.1", ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
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{"Windows 2001 SP2", ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
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{"Windows 2001.1 SP1", ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
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{"Windows 2006", ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */
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{"Windows 2006.1", ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */
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{"Windows 2006 SP1", ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */
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{"Windows 2009", ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */
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/* Feature Group Strings */
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{"Extended Address Space Descriptor", 0}
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/*
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* All "optional" feature group strings (features that are implemented
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* by the host) should be implemented in the host version of
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* acpi_os_validate_interface and should not be added here.
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*/
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};
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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 the _OSI predefined control method
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*
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******************************************************************************/
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acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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union acpi_operand_object *string_desc;
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union acpi_operand_object *return_desc;
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u32 return_value;
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u32 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 */
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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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/* Default return value is 0, NOT SUPPORTED */
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return_value = 0;
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/* Compare input string to static table of supported interfaces */
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for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) {
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if (!ACPI_STRCMP(string_desc->string.pointer,
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acpi_interfaces_supported[i].name)) {
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/*
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* The interface is supported.
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* Update the osi_data if necessary. We keep track of the latest
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* version of Windows that has been requested by the BIOS.
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*/
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if (acpi_interfaces_supported[i].value >
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acpi_gbl_osi_data) {
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acpi_gbl_osi_data =
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acpi_interfaces_supported[i].value;
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}
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return_value = ACPI_UINT32_MAX;
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goto exit;
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}
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}
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/*
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* Did not match the string in the static table, call the host OSL to
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* check for a match with one of the optional strings (such as
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* "Module Device", "3.0 Thermal Model", etc.)
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*/
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status = acpi_os_validate_interface(string_desc->string.pointer);
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if (ACPI_SUCCESS(status)) {
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/* The interface is supported */
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return_value = ACPI_UINT32_MAX;
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}
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exit:
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,
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"ACPI: BIOS _OSI(%s) is %ssupported\n",
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string_desc->string.pointer, return_value == 0 ? "not " : ""));
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/* Complete the return value */
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return_desc->integer.value = return_value;
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walk_state->return_desc = return_desc;
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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_osi_invalidate
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*
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* PARAMETERS: interface_string
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*
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* RETURN: Status
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*
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* DESCRIPTION: invalidate string in pre-defiend _OSI string list
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*
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******************************************************************************/
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acpi_status acpi_osi_invalidate(char *interface)
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{
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int i;
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for (i = 0; i < ACPI_ARRAY_LENGTH(acpi_interfaces_supported); i++) {
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if (!ACPI_STRCMP(interface, acpi_interfaces_supported[i].name)) {
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*acpi_interfaces_supported[i].name = '\0';
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return AE_OK;
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}
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}
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return AE_NOT_FOUND;
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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(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_evaluate_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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/* Allocate the evaluation information block */
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info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
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if (!info) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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info->prefix_node = prefix_node;
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info->pathname = path;
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/* Evaluate the object/method */
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status = acpi_ns_evaluate(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,
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"[%4.4s.%s] was not found\n",
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acpi_ut_get_node_name(prefix_node),
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path));
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} else {
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ACPI_ERROR_METHOD("Method execution failed",
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prefix_node, path, status);
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}
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goto cleanup;
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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_ERROR_METHOD("No object was returned from",
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prefix_node, path, AE_NOT_EXIST);
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status = AE_NOT_EXIST;
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}
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goto cleanup;
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}
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/* Map the return object type to the bitmapped type */
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switch ((info->return_object)->common.type) {
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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) && (!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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goto cleanup;
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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_ERROR_METHOD("Return object type is incorrect",
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prefix_node, path, AE_TYPE);
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ACPI_ERROR((AE_INFO,
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"Type returned from %s was incorrect: %s, expected Btypes: %X",
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path,
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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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status = AE_TYPE;
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goto cleanup;
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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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cleanup:
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ACPI_FREE(info);
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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_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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* Value - 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 *Value.
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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(char *object_name,
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struct acpi_namespace_node *device_node,
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acpi_integer *value)
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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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*value = 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_execute_STA
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*
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* PARAMETERS: device_node - Node for the device
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* Flags - Where the status flags are returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes _STA for selected device and stores results in
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* *Flags.
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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_STA(struct acpi_namespace_node *device_node, u32 * flags)
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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_STA);
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status = acpi_ut_evaluate_object(device_node, METHOD_NAME__STA,
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ACPI_BTYPE_INTEGER, &obj_desc);
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if (ACPI_FAILURE(status)) {
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if (AE_NOT_FOUND == status) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"_STA on %4.4s was not found, assuming device is present\n",
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acpi_ut_get_node_name(device_node)));
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*flags = ACPI_UINT32_MAX;
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status = AE_OK;
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}
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return_ACPI_STATUS(status);
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}
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/* Extract the status flags */
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*flags = (u32) 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_execute_power_methods
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*
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* PARAMETERS: device_node - Node for the device
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* method_names - Array of power method names
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* method_count - Number of methods to execute
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* out_values - Where the power method values are returned
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*
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* RETURN: Status, out_values
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*
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* DESCRIPTION: Executes the specified power methods for the device and returns
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* the result(s).
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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_power_methods(struct acpi_namespace_node *device_node,
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const char **method_names,
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u8 method_count, u8 *out_values)
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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_status final_status = AE_NOT_FOUND;
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u32 i;
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ACPI_FUNCTION_TRACE(ut_execute_power_methods);
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for (i = 0; i < method_count; i++) {
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/*
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* Execute the power method (_sx_d or _sx_w). The only allowable
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* return type is an Integer.
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*/
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status = acpi_ut_evaluate_object(device_node,
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ACPI_CAST_PTR(char,
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method_names[i]),
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ACPI_BTYPE_INTEGER, &obj_desc);
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if (ACPI_SUCCESS(status)) {
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out_values[i] = (u8)obj_desc->integer.value;
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/* Delete the return object */
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acpi_ut_remove_reference(obj_desc);
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final_status = AE_OK; /* At least one value is valid */
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continue;
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}
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out_values[i] = ACPI_UINT8_MAX;
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if (status == AE_NOT_FOUND) {
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continue; /* Ignore if not found */
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}
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Failed %s on Device %4.4s, %s\n",
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ACPI_CAST_PTR(char, method_names[i]),
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acpi_ut_get_node_name(device_node),
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acpi_format_exception(status)));
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}
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return_ACPI_STATUS(final_status);
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}
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