1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2014, 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 #define __UTOSI_C__ 45 46 #include "acpi.h" 47 #include "accommon.h" 48 49 50 #define _COMPONENT ACPI_UTILITIES 51 ACPI_MODULE_NAME ("utosi") 52 53 54 /****************************************************************************** 55 * 56 * ACPICA policy for new _OSI strings: 57 * 58 * It is the stated policy of ACPICA that new _OSI strings will be integrated 59 * into this module as soon as possible after they are defined. It is strongly 60 * recommended that all ACPICA hosts mirror this policy and integrate any 61 * changes to this module as soon as possible. There are several historical 62 * reasons behind this policy: 63 * 64 * 1) New BIOSs tend to test only the case where the host responds TRUE to 65 * the latest version of Windows, which would respond to the latest/newest 66 * _OSI string. Not responding TRUE to the latest version of Windows will 67 * risk executing untested code paths throughout the DSDT and SSDTs. 68 * 69 * 2) If a new _OSI string is recognized only after a significant delay, this 70 * has the potential to cause problems on existing working machines because 71 * of the possibility that a new and different path through the ASL code 72 * will be executed. 73 * 74 * 3) New _OSI strings are tending to come out about once per year. A delay 75 * in recognizing a new string for a significant amount of time risks the 76 * release of another string which only compounds the initial problem. 77 * 78 *****************************************************************************/ 79 80 81 /* 82 * Strings supported by the _OSI predefined control method (which is 83 * implemented internally within this module.) 84 * 85 * March 2009: Removed "Linux" as this host no longer wants to respond true 86 * for this string. Basically, the only safe OS strings are windows-related 87 * and in many or most cases represent the only test path within the 88 * BIOS-provided ASL code. 89 * 90 * The last element of each entry is used to track the newest version of 91 * Windows that the BIOS has requested. 92 */ 93 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 94 { 95 /* Operating System Vendor Strings */ 96 97 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 98 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 99 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 100 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 101 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 102 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 103 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 104 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 105 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 106 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 107 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 108 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 109 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 110 111 /* Feature Group Strings */ 112 113 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 114 115 /* 116 * All "optional" feature group strings (features that are implemented 117 * by the host) should be dynamically modified to VALID by the host via 118 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature 119 * group strings are set as INVALID by default here. 120 */ 121 122 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 123 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 124 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 125 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 126 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 127 }; 128 129 130 /******************************************************************************* 131 * 132 * FUNCTION: AcpiUtInitializeInterfaces 133 * 134 * PARAMETERS: None 135 * 136 * RETURN: Status 137 * 138 * DESCRIPTION: Initialize the global _OSI supported interfaces list 139 * 140 ******************************************************************************/ 141 142 ACPI_STATUS 143 AcpiUtInitializeInterfaces ( 144 void) 145 { 146 ACPI_STATUS Status; 147 UINT32 i; 148 149 150 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 151 if (ACPI_FAILURE (Status)) 152 { 153 return (Status); 154 } 155 156 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 157 158 /* Link the static list of supported interfaces */ 159 160 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 161 { 162 AcpiDefaultSupportedInterfaces[i].Next = 163 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 164 } 165 166 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 167 return (AE_OK); 168 } 169 170 171 /******************************************************************************* 172 * 173 * FUNCTION: AcpiUtInterfaceTerminate 174 * 175 * PARAMETERS: None 176 * 177 * RETURN: Status 178 * 179 * DESCRIPTION: Delete all interfaces in the global list. Sets 180 * AcpiGbl_SupportedInterfaces to NULL. 181 * 182 ******************************************************************************/ 183 184 ACPI_STATUS 185 AcpiUtInterfaceTerminate ( 186 void) 187 { 188 ACPI_STATUS Status; 189 ACPI_INTERFACE_INFO *NextInterface; 190 191 192 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 193 if (ACPI_FAILURE (Status)) 194 { 195 return (Status); 196 } 197 198 NextInterface = AcpiGbl_SupportedInterfaces; 199 while (NextInterface) 200 { 201 AcpiGbl_SupportedInterfaces = NextInterface->Next; 202 203 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 204 { 205 /* Only interfaces added at runtime can be freed */ 206 207 ACPI_FREE (NextInterface->Name); 208 ACPI_FREE (NextInterface); 209 } 210 else 211 { 212 /* Interface is in static list. Reset it to invalid or valid. */ 213 214 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID) 215 { 216 NextInterface->Flags |= ACPI_OSI_INVALID; 217 } 218 else 219 { 220 NextInterface->Flags &= ~ACPI_OSI_INVALID; 221 } 222 } 223 224 NextInterface = AcpiGbl_SupportedInterfaces; 225 } 226 227 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 228 return (AE_OK); 229 } 230 231 232 /******************************************************************************* 233 * 234 * FUNCTION: AcpiUtInstallInterface 235 * 236 * PARAMETERS: InterfaceName - The interface to install 237 * 238 * RETURN: Status 239 * 240 * DESCRIPTION: Install the interface into the global interface list. 241 * Caller MUST hold AcpiGbl_OsiMutex 242 * 243 ******************************************************************************/ 244 245 ACPI_STATUS 246 AcpiUtInstallInterface ( 247 ACPI_STRING InterfaceName) 248 { 249 ACPI_INTERFACE_INFO *InterfaceInfo; 250 251 252 /* Allocate info block and space for the name string */ 253 254 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 255 if (!InterfaceInfo) 256 { 257 return (AE_NO_MEMORY); 258 } 259 260 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 261 if (!InterfaceInfo->Name) 262 { 263 ACPI_FREE (InterfaceInfo); 264 return (AE_NO_MEMORY); 265 } 266 267 /* Initialize new info and insert at the head of the global list */ 268 269 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 270 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 271 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 272 273 AcpiGbl_SupportedInterfaces = InterfaceInfo; 274 return (AE_OK); 275 } 276 277 278 /******************************************************************************* 279 * 280 * FUNCTION: AcpiUtRemoveInterface 281 * 282 * PARAMETERS: InterfaceName - The interface to remove 283 * 284 * RETURN: Status 285 * 286 * DESCRIPTION: Remove the interface from the global interface list. 287 * Caller MUST hold AcpiGbl_OsiMutex 288 * 289 ******************************************************************************/ 290 291 ACPI_STATUS 292 AcpiUtRemoveInterface ( 293 ACPI_STRING InterfaceName) 294 { 295 ACPI_INTERFACE_INFO *PreviousInterface; 296 ACPI_INTERFACE_INFO *NextInterface; 297 298 299 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 300 while (NextInterface) 301 { 302 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 303 { 304 /* Found: name is in either the static list or was added at runtime */ 305 306 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 307 { 308 /* Interface was added dynamically, remove and free it */ 309 310 if (PreviousInterface == NextInterface) 311 { 312 AcpiGbl_SupportedInterfaces = NextInterface->Next; 313 } 314 else 315 { 316 PreviousInterface->Next = NextInterface->Next; 317 } 318 319 ACPI_FREE (NextInterface->Name); 320 ACPI_FREE (NextInterface); 321 } 322 else 323 { 324 /* 325 * Interface is in static list. If marked invalid, then it 326 * does not actually exist. Else, mark it invalid. 327 */ 328 if (NextInterface->Flags & ACPI_OSI_INVALID) 329 { 330 return (AE_NOT_EXIST); 331 } 332 333 NextInterface->Flags |= ACPI_OSI_INVALID; 334 } 335 336 return (AE_OK); 337 } 338 339 PreviousInterface = NextInterface; 340 NextInterface = NextInterface->Next; 341 } 342 343 /* Interface was not found */ 344 345 return (AE_NOT_EXIST); 346 } 347 348 349 /******************************************************************************* 350 * 351 * FUNCTION: AcpiUtUpdateInterfaces 352 * 353 * PARAMETERS: Action - Actions to be performed during the 354 * update 355 * 356 * RETURN: Status 357 * 358 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 359 * strings or/and feature group strings. 360 * Caller MUST hold AcpiGbl_OsiMutex 361 * 362 ******************************************************************************/ 363 364 ACPI_STATUS 365 AcpiUtUpdateInterfaces ( 366 UINT8 Action) 367 { 368 ACPI_INTERFACE_INFO *NextInterface; 369 370 371 NextInterface = AcpiGbl_SupportedInterfaces; 372 while (NextInterface) 373 { 374 if (((NextInterface->Flags & ACPI_OSI_FEATURE) && 375 (Action & ACPI_FEATURE_STRINGS)) || 376 (!(NextInterface->Flags & ACPI_OSI_FEATURE) && 377 (Action & ACPI_VENDOR_STRINGS))) 378 { 379 if (Action & ACPI_DISABLE_INTERFACES) 380 { 381 /* Mark the interfaces as invalid */ 382 383 NextInterface->Flags |= ACPI_OSI_INVALID; 384 } 385 else 386 { 387 /* Mark the interfaces as valid */ 388 389 NextInterface->Flags &= ~ACPI_OSI_INVALID; 390 } 391 } 392 393 NextInterface = NextInterface->Next; 394 } 395 396 return (AE_OK); 397 } 398 399 400 /******************************************************************************* 401 * 402 * FUNCTION: AcpiUtGetInterface 403 * 404 * PARAMETERS: InterfaceName - The interface to find 405 * 406 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 407 * 408 * DESCRIPTION: Search for the specified interface name in the global list. 409 * Caller MUST hold AcpiGbl_OsiMutex 410 * 411 ******************************************************************************/ 412 413 ACPI_INTERFACE_INFO * 414 AcpiUtGetInterface ( 415 ACPI_STRING InterfaceName) 416 { 417 ACPI_INTERFACE_INFO *NextInterface; 418 419 420 NextInterface = AcpiGbl_SupportedInterfaces; 421 while (NextInterface) 422 { 423 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 424 { 425 return (NextInterface); 426 } 427 428 NextInterface = NextInterface->Next; 429 } 430 431 return (NULL); 432 } 433 434 435 /******************************************************************************* 436 * 437 * FUNCTION: AcpiUtOsiImplementation 438 * 439 * PARAMETERS: WalkState - Current walk state 440 * 441 * RETURN: Status 442 * 443 * DESCRIPTION: Implementation of the _OSI predefined control method. When 444 * an invocation of _OSI is encountered in the system AML, 445 * control is transferred to this function. 446 * 447 ******************************************************************************/ 448 449 ACPI_STATUS 450 AcpiUtOsiImplementation ( 451 ACPI_WALK_STATE *WalkState) 452 { 453 ACPI_OPERAND_OBJECT *StringDesc; 454 ACPI_OPERAND_OBJECT *ReturnDesc; 455 ACPI_INTERFACE_INFO *InterfaceInfo; 456 ACPI_INTERFACE_HANDLER InterfaceHandler; 457 ACPI_STATUS Status; 458 UINT32 ReturnValue; 459 460 461 ACPI_FUNCTION_TRACE (UtOsiImplementation); 462 463 464 /* Validate the string input argument (from the AML caller) */ 465 466 StringDesc = WalkState->Arguments[0].Object; 467 if (!StringDesc || 468 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 469 { 470 return_ACPI_STATUS (AE_TYPE); 471 } 472 473 /* Create a return object */ 474 475 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 476 if (!ReturnDesc) 477 { 478 return_ACPI_STATUS (AE_NO_MEMORY); 479 } 480 481 /* Default return value is 0, NOT SUPPORTED */ 482 483 ReturnValue = 0; 484 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 485 if (ACPI_FAILURE (Status)) 486 { 487 AcpiUtRemoveReference (ReturnDesc); 488 return_ACPI_STATUS (Status); 489 } 490 491 /* Lookup the interface in the global _OSI list */ 492 493 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 494 if (InterfaceInfo && 495 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 496 { 497 /* 498 * The interface is supported. 499 * Update the OsiData if necessary. We keep track of the latest 500 * version of Windows that has been requested by the BIOS. 501 */ 502 if (InterfaceInfo->Value > AcpiGbl_OsiData) 503 { 504 AcpiGbl_OsiData = InterfaceInfo->Value; 505 } 506 507 ReturnValue = ACPI_UINT32_MAX; 508 } 509 510 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 511 512 /* 513 * Invoke an optional _OSI interface handler. The host OS may wish 514 * to do some interface-specific handling. For example, warn about 515 * certain interfaces or override the true/false support value. 516 */ 517 InterfaceHandler = AcpiGbl_InterfaceHandler; 518 if (InterfaceHandler) 519 { 520 ReturnValue = InterfaceHandler ( 521 StringDesc->String.Pointer, ReturnValue); 522 } 523 524 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 525 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 526 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 527 528 /* Complete the return object */ 529 530 ReturnDesc->Integer.Value = ReturnValue; 531 WalkState->ReturnDesc = ReturnDesc; 532 return_ACPI_STATUS (AE_OK); 533 } 534