/****************************************************************************** * * Module Name: utosi - Support for the _OSI predefined control method * *****************************************************************************/ /* * Copyright (C) 2000 - 2012, 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); }