397 lines
12 KiB
C
397 lines
12 KiB
C
/******************************************************************************
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*
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* Module Name: utosi - Support for the _OSI predefined control method
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, 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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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utosi")
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/*
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* Strings supported by the _OSI predefined control method (which is
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* implemented internally within this module.)
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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 last 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_default_supported_interfaces[] = {
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/* Operating System Vendor Strings */
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{"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */
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{"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */
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{"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
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{"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
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{"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
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{"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
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{"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows vista - Added 03/2006 */
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{"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */
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{"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */
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{"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */
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{"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */
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{"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */
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/* Feature Group Strings */
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{"Extended Address Space Descriptor", NULL, 0, 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 dynamically added by the host via
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* acpi_install_interface and should not be manually added here.
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*
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* Examples of optional feature group strings:
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*
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* "Module Device"
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* "Processor Device"
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* "3.0 Thermal Model"
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* "3.0 _SCP Extensions"
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* "Processor Aggregator Device"
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*/
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};
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_initialize_interfaces
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize the global _OSI supported interfaces list
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*
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******************************************************************************/
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acpi_status acpi_ut_initialize_interfaces(void)
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{
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acpi_status status;
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u32 i;
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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acpi_gbl_supported_interfaces = acpi_default_supported_interfaces;
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/* Link the static list of supported interfaces */
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for (i = 0;
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i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1);
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i++) {
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acpi_default_supported_interfaces[i].next =
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&acpi_default_supported_interfaces[(acpi_size) i + 1];
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}
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_interface_terminate
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete all interfaces in the global list. Sets
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* acpi_gbl_supported_interfaces to NULL.
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*
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******************************************************************************/
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acpi_status acpi_ut_interface_terminate(void)
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{
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acpi_status status;
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struct acpi_interface_info *next_interface;
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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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next_interface = acpi_gbl_supported_interfaces;
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while (next_interface) {
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acpi_gbl_supported_interfaces = next_interface->next;
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/* Only interfaces added at runtime can be freed */
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if (next_interface->flags & ACPI_OSI_DYNAMIC) {
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ACPI_FREE(next_interface->name);
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ACPI_FREE(next_interface);
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}
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next_interface = acpi_gbl_supported_interfaces;
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}
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_install_interface
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*
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* PARAMETERS: interface_name - The interface to install
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install the interface into the global interface list.
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* Caller MUST hold acpi_gbl_osi_mutex
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*
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******************************************************************************/
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acpi_status acpi_ut_install_interface(acpi_string interface_name)
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{
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struct acpi_interface_info *interface_info;
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/* Allocate info block and space for the name string */
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interface_info =
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ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info));
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if (!interface_info) {
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return (AE_NO_MEMORY);
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}
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interface_info->name =
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ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1);
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if (!interface_info->name) {
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ACPI_FREE(interface_info);
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return (AE_NO_MEMORY);
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}
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/* Initialize new info and insert at the head of the global list */
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ACPI_STRCPY(interface_info->name, interface_name);
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interface_info->flags = ACPI_OSI_DYNAMIC;
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interface_info->next = acpi_gbl_supported_interfaces;
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acpi_gbl_supported_interfaces = interface_info;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_remove_interface
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*
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* PARAMETERS: interface_name - The interface to remove
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove the interface from the global interface list.
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* Caller MUST hold acpi_gbl_osi_mutex
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*
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******************************************************************************/
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acpi_status acpi_ut_remove_interface(acpi_string interface_name)
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{
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struct acpi_interface_info *previous_interface;
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struct acpi_interface_info *next_interface;
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previous_interface = next_interface = acpi_gbl_supported_interfaces;
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while (next_interface) {
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if (!ACPI_STRCMP(interface_name, next_interface->name)) {
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/* Found: name is in either the static list or was added at runtime */
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if (next_interface->flags & ACPI_OSI_DYNAMIC) {
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/* Interface was added dynamically, remove and free it */
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if (previous_interface == next_interface) {
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acpi_gbl_supported_interfaces =
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next_interface->next;
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} else {
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previous_interface->next =
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next_interface->next;
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}
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ACPI_FREE(next_interface->name);
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ACPI_FREE(next_interface);
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} else {
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/*
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* Interface is in static list. If marked invalid, then it
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* does not actually exist. Else, mark it invalid.
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*/
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if (next_interface->flags & ACPI_OSI_INVALID) {
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return (AE_NOT_EXIST);
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}
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next_interface->flags |= ACPI_OSI_INVALID;
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}
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return (AE_OK);
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}
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previous_interface = next_interface;
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next_interface = next_interface->next;
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}
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/* Interface was not found */
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return (AE_NOT_EXIST);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_interface
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*
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* PARAMETERS: interface_name - The interface to find
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*
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* RETURN: struct acpi_interface_info if found. NULL if not found.
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*
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* DESCRIPTION: Search for the specified interface name in the global list.
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* Caller MUST hold acpi_gbl_osi_mutex
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*
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******************************************************************************/
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struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name)
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{
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struct acpi_interface_info *next_interface;
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next_interface = acpi_gbl_supported_interfaces;
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while (next_interface) {
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if (!ACPI_STRCMP(interface_name, next_interface->name)) {
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return (next_interface);
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}
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next_interface = next_interface->next;
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}
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return (NULL);
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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. When
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* an invocation of _OSI is encountered in the system AML,
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* control is transferred to this function.
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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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union acpi_operand_object *string_desc;
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union acpi_operand_object *return_desc;
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struct acpi_interface_info *interface_info;
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acpi_interface_handler interface_handler;
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acpi_status status;
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u32 return_value;
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ACPI_FUNCTION_TRACE(ut_osi_implementation);
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/* Validate the string input argument (from the AML caller) */
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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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status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(return_desc);
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return_ACPI_STATUS(status);
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}
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/* Lookup the interface in the global _OSI list */
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interface_info = acpi_ut_get_interface(string_desc->string.pointer);
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if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) {
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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 (interface_info->value > acpi_gbl_osi_data) {
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acpi_gbl_osi_data = interface_info->value;
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}
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return_value = ACPI_UINT32_MAX;
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}
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acpi_os_release_mutex(acpi_gbl_osi_mutex);
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/*
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* Invoke an optional _OSI interface handler. The host OS may wish
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* to do some interface-specific handling. For example, warn about
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* certain interfaces or override the true/false support value.
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*/
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interface_handler = acpi_gbl_interface_handler;
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if (interface_handler) {
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return_value =
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interface_handler(string_desc->string.pointer,
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return_value);
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}
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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,
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return_value == 0 ? "not " : ""));
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/* Complete the return object */
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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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