/******************************************************************************
*
* Module Name: utosi - Support for the _OSI predefined control method
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2010, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utosi")
/*
* Strings supported by the _OSI predefined control method (which is
* implemented internally within this module.)
*
* March 2009: Removed "Linux" as this host no longer wants to respond true
* for this string. Basically, the only safe OS strings are windows-related
* and in many or most cases represent the only test path within the
* BIOS-provided ASL code.
*
* The last element of each entry is used to track the newest version of
* Windows that the BIOS has requested.
*/
static struct acpi_interface_info acpi_default_supported_interfaces[] = {
/* Operating System Vendor Strings */
{"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */
{"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */
{"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
{"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
{"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
{"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
{"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */
{"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */
{"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */
{"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */
{"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */
/* Feature Group Strings */
{"Extended Address Space Descriptor", NULL, 0, 0}
/*
* All "optional" feature group strings (features that are implemented
* by the host) should be dynamically added by the host via
* acpi_install_interface and should not be manually added here.
*
* Examples of optional feature group strings:
*
* "Module Device"
* "Processor Device"
* "3.0 Thermal Model"
* "3.0 _SCP Extensions"
* "Processor Aggregator Device"
*/
};
/*******************************************************************************
*
* FUNCTION: acpi_ut_initialize_interfaces
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize the global _OSI supported interfaces list
*
******************************************************************************/
acpi_status acpi_ut_initialize_interfaces(void)
{
u32 i;
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
acpi_gbl_supported_interfaces = acpi_default_supported_interfaces;
/* Link the static list of supported interfaces */
for (i = 0;
i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1);
i++) {
acpi_default_supported_interfaces[i].next =
&acpi_default_supported_interfaces[(acpi_size) i + 1];
}
acpi_os_release_mutex(acpi_gbl_osi_mutex);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_interface_terminate
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Delete all interfaces in the global list. Sets
* acpi_gbl_supported_interfaces to NULL.
*
******************************************************************************/
void acpi_ut_interface_terminate(void)
{
struct acpi_interface_info *next_interface;
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
next_interface = acpi_gbl_supported_interfaces;
while (next_interface) {
acpi_gbl_supported_interfaces = next_interface->next;
/* Only interfaces added at runtime can be freed */
if (next_interface->flags & ACPI_OSI_DYNAMIC) {
ACPI_FREE(next_interface->name);
ACPI_FREE(next_interface);
}
next_interface = acpi_gbl_supported_interfaces;
}
acpi_os_release_mutex(acpi_gbl_osi_mutex);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_install_interface
*
* PARAMETERS: interface_name - The interface to install
*
* RETURN: Status
*
* DESCRIPTION: Install the interface into the global interface list.
* Caller MUST hold acpi_gbl_osi_mutex
*
******************************************************************************/
acpi_status acpi_ut_install_interface(acpi_string interface_name)
{
struct acpi_interface_info *interface_info;
/* Allocate info block and space for the name string */
interface_info =
ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info));
if (!interface_info) {
return (AE_NO_MEMORY);
}
interface_info->name =
ACPI_ALLOCATE_ZEROED(ACPI_STRLEN(interface_name) + 1);
if (!interface_info->name) {
ACPI_FREE(interface_info);
return (AE_NO_MEMORY);
}
/* Initialize new info and insert at the head of the global list */
ACPI_STRCPY(interface_info->name, interface_name);
interface_info->flags = ACPI_OSI_DYNAMIC;
interface_info->next = acpi_gbl_supported_interfaces;
acpi_gbl_supported_interfaces = interface_info;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_remove_interface
*
* PARAMETERS: interface_name - The interface to remove
*
* RETURN: Status
*
* DESCRIPTION: Remove the interface from the global interface list.
* Caller MUST hold acpi_gbl_osi_mutex
*
******************************************************************************/
acpi_status acpi_ut_remove_interface(acpi_string interface_name)
{
struct acpi_interface_info *previous_interface;
struct acpi_interface_info *next_interface;
previous_interface = next_interface = acpi_gbl_supported_interfaces;
while (next_interface) {
if (!ACPI_STRCMP(interface_name, next_interface->name)) {
/* Found: name is in either the static list or was added at runtime */
if (next_interface->flags & ACPI_OSI_DYNAMIC) {
/* Interface was added dynamically, remove and free it */
if (previous_interface == next_interface) {
acpi_gbl_supported_interfaces =
next_interface->next;
} else {
previous_interface->next =
next_interface->next;
}
ACPI_FREE(next_interface->name);
ACPI_FREE(next_interface);
} else {
/*
* Interface is in static list. If marked invalid, then it
* does not actually exist. Else, mark it invalid.
*/
if (next_interface->flags & ACPI_OSI_INVALID) {
return (AE_NOT_EXIST);
}
next_interface->flags |= ACPI_OSI_INVALID;
}
return (AE_OK);
}
previous_interface = next_interface;
next_interface = next_interface->next;
}
/* Interface was not found */
return (AE_NOT_EXIST);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_interface
*
* PARAMETERS: interface_name - The interface to find
*
* RETURN: struct acpi_interface_info if found. NULL if not found.
*
* DESCRIPTION: Search for the specified interface name in the global list.
* Caller MUST hold acpi_gbl_osi_mutex
*
******************************************************************************/
struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name)
{
struct acpi_interface_info *next_interface;
next_interface = acpi_gbl_supported_interfaces;
while (next_interface) {
if (!ACPI_STRCMP(interface_name, next_interface->name)) {
return (next_interface);
}
next_interface = next_interface->next;
}
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_osi_implementation
*
* PARAMETERS: walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Implementation of the _OSI predefined control method. When
* an invocation of _OSI is encountered in the system AML,
* control is transferred to this function.
*
******************************************************************************/
acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state)
{
union acpi_operand_object *string_desc;
union acpi_operand_object *return_desc;
struct acpi_interface_info *interface_info;
acpi_interface_handler interface_handler;
u32 return_value;
ACPI_FUNCTION_TRACE(ut_osi_implementation);
/* Validate the string input argument (from the AML caller) */
string_desc = walk_state->arguments[0].object;
if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) {
return_ACPI_STATUS(AE_TYPE);
}
/* Create a return object */
return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
if (!return_desc) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Default return value is 0, NOT SUPPORTED */
return_value = 0;
(void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
/* Lookup the interface in the global _OSI list */
interface_info = acpi_ut_get_interface(string_desc->string.pointer);
if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) {
/*
* The interface is supported.
* Update the osi_data if necessary. We keep track of the latest
* version of Windows that has been requested by the BIOS.
*/
if (interface_info->value > acpi_gbl_osi_data) {
acpi_gbl_osi_data = interface_info->value;
}
return_value = ACPI_UINT32_MAX;
}
acpi_os_release_mutex(acpi_gbl_osi_mutex);
/*
* Invoke an optional _OSI interface handler. The host OS may wish
* to do some interface-specific handling. For example, warn about
* certain interfaces or override the true/false support value.
*/
interface_handler = acpi_gbl_interface_handler;
if (interface_handler) {
return_value =
interface_handler(string_desc->string.pointer,
return_value);
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,
"ACPI: BIOS _OSI(\"%s\") is %ssupported\n",
string_desc->string.pointer,
return_value == 0 ? "not " : ""));
/* Complete the return object */
return_desc->integer.value = return_value;
walk_state->return_desc = return_desc;
return_ACPI_STATUS(AE_OK);
}
