1/****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2013, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44#include <acpi/acpi.h> 45#include "accommon.h" 46 47#define _COMPONENT ACPI_UTILITIES 48ACPI_MODULE_NAME("utosi") 49 50/* 51 * Strings supported by the _OSI predefined control method (which is 52 * implemented internally within this module.) 53 * 54 * March 2009: Removed "Linux" as this host no longer wants to respond true 55 * for this string. Basically, the only safe OS strings are windows-related 56 * and in many or most cases represent the only test path within the 57 * BIOS-provided ASL code. 58 * 59 * The last element of each entry is used to track the newest version of 60 * Windows that the BIOS has requested. 61 */ 62static struct acpi_interface_info acpi_default_supported_interfaces[] = { 63 /* Operating System Vendor Strings */ 64 65 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 66 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 67 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 68 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 69 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 70 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 71 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows vista - Added 03/2006 */ 72 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 73 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 74 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 75 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 76 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 77 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 78 {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10}, /* Windows 10 - Added 03/2015 */ 79 80 /* Feature Group Strings */ 81 82 {"Extended Address Space Descriptor", NULL, 0, 0} 83 84 /* 85 * All "optional" feature group strings (features that are implemented 86 * by the host) should be dynamically added by the host via 87 * acpi_install_interface and should not be manually added here. 88 * 89 * Examples of optional feature group strings: 90 * 91 * "Module Device" 92 * "Processor Device" 93 * "3.0 Thermal Model" 94 * "3.0 _SCP Extensions" 95 * "Processor Aggregator Device" 96 */ 97}; 98 99/******************************************************************************* 100 * 101 * FUNCTION: acpi_ut_initialize_interfaces 102 * 103 * PARAMETERS: None 104 * 105 * RETURN: Status 106 * 107 * DESCRIPTION: Initialize the global _OSI supported interfaces list 108 * 109 ******************************************************************************/ 110 111acpi_status acpi_ut_initialize_interfaces(void) 112{ 113 acpi_status status; 114 u32 i; 115 116 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 117 if (ACPI_FAILURE(status)) { 118 return (status); 119 } 120 121 acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; 122 123 /* Link the static list of supported interfaces */ 124 125 for (i = 0; 126 i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); 127 i++) { 128 acpi_default_supported_interfaces[i].next = 129 &acpi_default_supported_interfaces[(acpi_size) i + 1]; 130 } 131 132 acpi_os_release_mutex(acpi_gbl_osi_mutex); 133 return (AE_OK); 134} 135 136/******************************************************************************* 137 * 138 * FUNCTION: acpi_ut_interface_terminate 139 * 140 * PARAMETERS: None 141 * 142 * RETURN: Status 143 * 144 * DESCRIPTION: Delete all interfaces in the global list. Sets 145 * acpi_gbl_supported_interfaces to NULL. 146 * 147 ******************************************************************************/ 148 149acpi_status acpi_ut_interface_terminate(void) 150{ 151 acpi_status status; 152 struct acpi_interface_info *next_interface; 153 154 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 155 if (ACPI_FAILURE(status)) { 156 return (status); 157 } 158 159 next_interface = acpi_gbl_supported_interfaces; 160 while (next_interface) { 161 acpi_gbl_supported_interfaces = next_interface->next; 162 163 /* Only interfaces added at runtime can be freed */ 164 165 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 166 ACPI_FREE(next_interface->name); 167 ACPI_FREE(next_interface); 168 } 169 170 next_interface = acpi_gbl_supported_interfaces; 171 } 172 173 acpi_os_release_mutex(acpi_gbl_osi_mutex); 174 return (AE_OK); 175} 176 177/******************************************************************************* 178 * 179 * FUNCTION: acpi_ut_install_interface 180 * 181 * PARAMETERS: interface_name - The interface to install 182 * 183 * RETURN: Status 184 * 185 * DESCRIPTION: Install the interface into the global interface list. 186 * Caller MUST hold acpi_gbl_osi_mutex 187 * 188 ******************************************************************************/ 189 190acpi_status acpi_ut_install_interface(acpi_string interface_name) 191{ 192 struct acpi_interface_info *interface_info; 193 194 /* Allocate info block and space for the name string */ 195 196 interface_info = 197 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); 198 if (!interface_info) { 199 return (AE_NO_MEMORY); 200 } 201 202 interface_info->name = ACPI_ALLOCATE_ZEROED(strlen(interface_name) + 1); 203 if (!interface_info->name) { 204 ACPI_FREE(interface_info); 205 return (AE_NO_MEMORY); 206 } 207 208 /* Initialize new info and insert at the head of the global list */ 209 210 strcpy(interface_info->name, interface_name); 211 interface_info->flags = ACPI_OSI_DYNAMIC; 212 interface_info->next = acpi_gbl_supported_interfaces; 213 214 acpi_gbl_supported_interfaces = interface_info; 215 return (AE_OK); 216} 217 218/******************************************************************************* 219 * 220 * FUNCTION: acpi_ut_remove_interface 221 * 222 * PARAMETERS: interface_name - The interface to remove 223 * 224 * RETURN: Status 225 * 226 * DESCRIPTION: Remove the interface from the global interface list. 227 * Caller MUST hold acpi_gbl_osi_mutex 228 * 229 ******************************************************************************/ 230 231acpi_status acpi_ut_remove_interface(acpi_string interface_name) 232{ 233 struct acpi_interface_info *previous_interface; 234 struct acpi_interface_info *next_interface; 235 236 previous_interface = next_interface = acpi_gbl_supported_interfaces; 237 while (next_interface) { 238 if (!strcmp(interface_name, next_interface->name)) { 239 240 /* Found: name is in either the static list or was added at runtime */ 241 242 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 243 244 /* Interface was added dynamically, remove and free it */ 245 246 if (previous_interface == next_interface) { 247 acpi_gbl_supported_interfaces = 248 next_interface->next; 249 } else { 250 previous_interface->next = 251 next_interface->next; 252 } 253 254 ACPI_FREE(next_interface->name); 255 ACPI_FREE(next_interface); 256 } else { 257 /* 258 * Interface is in static list. If marked invalid, then it 259 * does not actually exist. Else, mark it invalid. 260 */ 261 if (next_interface->flags & ACPI_OSI_INVALID) { 262 return (AE_NOT_EXIST); 263 } 264 265 next_interface->flags |= ACPI_OSI_INVALID; 266 } 267 268 return (AE_OK); 269 } 270 271 previous_interface = next_interface; 272 next_interface = next_interface->next; 273 } 274 275 /* Interface was not found */ 276 277 return (AE_NOT_EXIST); 278} 279 280/******************************************************************************* 281 * 282 * FUNCTION: acpi_ut_get_interface 283 * 284 * PARAMETERS: interface_name - The interface to find 285 * 286 * RETURN: struct acpi_interface_info if found. NULL if not found. 287 * 288 * DESCRIPTION: Search for the specified interface name in the global list. 289 * Caller MUST hold acpi_gbl_osi_mutex 290 * 291 ******************************************************************************/ 292 293struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) 294{ 295 struct acpi_interface_info *next_interface; 296 297 next_interface = acpi_gbl_supported_interfaces; 298 while (next_interface) { 299 if (!strcmp(interface_name, next_interface->name)) { 300 return (next_interface); 301 } 302 303 next_interface = next_interface->next; 304 } 305 306 return (NULL); 307} 308 309/******************************************************************************* 310 * 311 * FUNCTION: acpi_ut_osi_implementation 312 * 313 * PARAMETERS: walk_state - Current walk state 314 * 315 * RETURN: Status 316 * 317 * DESCRIPTION: Implementation of the _OSI predefined control method. When 318 * an invocation of _OSI is encountered in the system AML, 319 * control is transferred to this function. 320 * 321 ******************************************************************************/ 322 323acpi_status acpi_ut_osi_implementation(struct acpi_walk_state * walk_state) 324{ 325 union acpi_operand_object *string_desc; 326 union acpi_operand_object *return_desc; 327 struct acpi_interface_info *interface_info; 328 acpi_interface_handler interface_handler; 329 acpi_status status; 330 u32 return_value; 331 332 ACPI_FUNCTION_TRACE(ut_osi_implementation); 333 334 /* Validate the string input argument (from the AML caller) */ 335 336 string_desc = walk_state->arguments[0].object; 337 if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { 338 return_ACPI_STATUS(AE_TYPE); 339 } 340 341 /* Create a return object */ 342 343 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); 344 if (!return_desc) { 345 return_ACPI_STATUS(AE_NO_MEMORY); 346 } 347 348 /* Default return value is 0, NOT SUPPORTED */ 349 350 return_value = 0; 351 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 352 if (ACPI_FAILURE(status)) { 353 acpi_ut_remove_reference(return_desc); 354 return_ACPI_STATUS(status); 355 } 356 357 /* Lookup the interface in the global _OSI list */ 358 359 interface_info = acpi_ut_get_interface(string_desc->string.pointer); 360 if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { 361 /* 362 * The interface is supported. 363 * Update the osi_data if necessary. We keep track of the latest 364 * version of Windows that has been requested by the BIOS. 365 */ 366 if (interface_info->value > acpi_gbl_osi_data) { 367 acpi_gbl_osi_data = interface_info->value; 368 } 369 370 return_value = ACPI_UINT32_MAX; 371 } 372 373 acpi_os_release_mutex(acpi_gbl_osi_mutex); 374 375 /* 376 * Invoke an optional _OSI interface handler. The host OS may wish 377 * to do some interface-specific handling. For example, warn about 378 * certain interfaces or override the true/false support value. 379 */ 380 interface_handler = acpi_gbl_interface_handler; 381 if (interface_handler) { 382 return_value = 383 interface_handler(string_desc->string.pointer, 384 return_value); 385 } 386 387 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, 388 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 389 string_desc->string.pointer, 390 return_value == 0 ? "not " : "")); 391 392 /* Complete the return object */ 393 394 return_desc->integer.value = return_value; 395 walk_state->return_desc = return_desc; 396 return_ACPI_STATUS(AE_OK); 397} 398