1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2013, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 #define __UTOSI_C__ 117 118 #include "acpi.h" 119 #include "accommon.h" 120 121 122 #define _COMPONENT ACPI_UTILITIES 123 ACPI_MODULE_NAME ("utosi") 124 125 /* 126 * Strings supported by the _OSI predefined control method (which is 127 * implemented internally within this module.) 128 * 129 * March 2009: Removed "Linux" as this host no longer wants to respond true 130 * for this string. Basically, the only safe OS strings are windows-related 131 * and in many or most cases represent the only test path within the 132 * BIOS-provided ASL code. 133 * 134 * The last element of each entry is used to track the newest version of 135 * Windows that the BIOS has requested. 136 */ 137 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 138 { 139 /* Operating System Vendor Strings */ 140 141 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 142 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 143 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 144 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 145 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 146 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 147 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 148 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 149 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 150 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 151 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 152 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 153 154 /* Feature Group Strings */ 155 156 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 157 158 /* 159 * All "optional" feature group strings (features that are implemented 160 * by the host) should be dynamically modified to VALID by the host via 161 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature 162 * group strings are set as INVALID by default here. 163 */ 164 165 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 166 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 167 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 168 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 169 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 170 }; 171 172 173 /******************************************************************************* 174 * 175 * FUNCTION: AcpiUtInitializeInterfaces 176 * 177 * PARAMETERS: None 178 * 179 * RETURN: Status 180 * 181 * DESCRIPTION: Initialize the global _OSI supported interfaces list 182 * 183 ******************************************************************************/ 184 185 ACPI_STATUS 186 AcpiUtInitializeInterfaces ( 187 void) 188 { 189 ACPI_STATUS Status; 190 UINT32 i; 191 192 193 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 194 if (ACPI_FAILURE (Status)) 195 { 196 return (Status); 197 } 198 199 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 200 201 /* Link the static list of supported interfaces */ 202 203 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 204 { 205 AcpiDefaultSupportedInterfaces[i].Next = 206 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 207 } 208 209 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 210 return (AE_OK); 211 } 212 213 214 /******************************************************************************* 215 * 216 * FUNCTION: AcpiUtInterfaceTerminate 217 * 218 * PARAMETERS: None 219 * 220 * RETURN: Status 221 * 222 * DESCRIPTION: Delete all interfaces in the global list. Sets 223 * AcpiGbl_SupportedInterfaces to NULL. 224 * 225 ******************************************************************************/ 226 227 ACPI_STATUS 228 AcpiUtInterfaceTerminate ( 229 void) 230 { 231 ACPI_STATUS Status; 232 ACPI_INTERFACE_INFO *NextInterface; 233 234 235 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 236 if (ACPI_FAILURE (Status)) 237 { 238 return (Status); 239 } 240 241 NextInterface = AcpiGbl_SupportedInterfaces; 242 while (NextInterface) 243 { 244 AcpiGbl_SupportedInterfaces = NextInterface->Next; 245 246 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 247 { 248 /* Only interfaces added at runtime can be freed */ 249 250 ACPI_FREE (NextInterface->Name); 251 ACPI_FREE (NextInterface); 252 } 253 else 254 { 255 /* Interface is in static list. Reset it to invalid or valid. */ 256 257 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID) 258 { 259 NextInterface->Flags |= ACPI_OSI_INVALID; 260 } 261 else 262 { 263 NextInterface->Flags &= ~ACPI_OSI_INVALID; 264 } 265 } 266 267 NextInterface = AcpiGbl_SupportedInterfaces; 268 } 269 270 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 271 return (AE_OK); 272 } 273 274 275 /******************************************************************************* 276 * 277 * FUNCTION: AcpiUtInstallInterface 278 * 279 * PARAMETERS: InterfaceName - The interface to install 280 * 281 * RETURN: Status 282 * 283 * DESCRIPTION: Install the interface into the global interface list. 284 * Caller MUST hold AcpiGbl_OsiMutex 285 * 286 ******************************************************************************/ 287 288 ACPI_STATUS 289 AcpiUtInstallInterface ( 290 ACPI_STRING InterfaceName) 291 { 292 ACPI_INTERFACE_INFO *InterfaceInfo; 293 294 295 /* Allocate info block and space for the name string */ 296 297 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 298 if (!InterfaceInfo) 299 { 300 return (AE_NO_MEMORY); 301 } 302 303 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 304 if (!InterfaceInfo->Name) 305 { 306 ACPI_FREE (InterfaceInfo); 307 return (AE_NO_MEMORY); 308 } 309 310 /* Initialize new info and insert at the head of the global list */ 311 312 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 313 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 314 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 315 316 AcpiGbl_SupportedInterfaces = InterfaceInfo; 317 return (AE_OK); 318 } 319 320 321 /******************************************************************************* 322 * 323 * FUNCTION: AcpiUtRemoveInterface 324 * 325 * PARAMETERS: InterfaceName - The interface to remove 326 * 327 * RETURN: Status 328 * 329 * DESCRIPTION: Remove the interface from the global interface list. 330 * Caller MUST hold AcpiGbl_OsiMutex 331 * 332 ******************************************************************************/ 333 334 ACPI_STATUS 335 AcpiUtRemoveInterface ( 336 ACPI_STRING InterfaceName) 337 { 338 ACPI_INTERFACE_INFO *PreviousInterface; 339 ACPI_INTERFACE_INFO *NextInterface; 340 341 342 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 343 while (NextInterface) 344 { 345 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 346 { 347 /* Found: name is in either the static list or was added at runtime */ 348 349 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 350 { 351 /* Interface was added dynamically, remove and free it */ 352 353 if (PreviousInterface == NextInterface) 354 { 355 AcpiGbl_SupportedInterfaces = NextInterface->Next; 356 } 357 else 358 { 359 PreviousInterface->Next = NextInterface->Next; 360 } 361 362 ACPI_FREE (NextInterface->Name); 363 ACPI_FREE (NextInterface); 364 } 365 else 366 { 367 /* 368 * Interface is in static list. If marked invalid, then it 369 * does not actually exist. Else, mark it invalid. 370 */ 371 if (NextInterface->Flags & ACPI_OSI_INVALID) 372 { 373 return (AE_NOT_EXIST); 374 } 375 376 NextInterface->Flags |= ACPI_OSI_INVALID; 377 } 378 379 return (AE_OK); 380 } 381 382 PreviousInterface = NextInterface; 383 NextInterface = NextInterface->Next; 384 } 385 386 /* Interface was not found */ 387 388 return (AE_NOT_EXIST); 389 } 390 391 392 /******************************************************************************* 393 * 394 * FUNCTION: AcpiUtUpdateInterfaces 395 * 396 * PARAMETERS: Action - Actions to be performed during the 397 * update 398 * 399 * RETURN: Status 400 * 401 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 402 * strings or/and feature group strings. 403 * Caller MUST hold AcpiGbl_OsiMutex 404 * 405 ******************************************************************************/ 406 407 ACPI_STATUS 408 AcpiUtUpdateInterfaces ( 409 UINT8 Action) 410 { 411 ACPI_INTERFACE_INFO *NextInterface; 412 413 414 NextInterface = AcpiGbl_SupportedInterfaces; 415 while (NextInterface) 416 { 417 if (((NextInterface->Flags & ACPI_OSI_FEATURE) && 418 (Action & ACPI_FEATURE_STRINGS)) || 419 (!(NextInterface->Flags & ACPI_OSI_FEATURE) && 420 (Action & ACPI_VENDOR_STRINGS))) 421 { 422 if (Action & ACPI_DISABLE_INTERFACES) 423 { 424 /* Mark the interfaces as invalid */ 425 426 NextInterface->Flags |= ACPI_OSI_INVALID; 427 } 428 else 429 { 430 /* Mark the interfaces as valid */ 431 432 NextInterface->Flags &= ~ACPI_OSI_INVALID; 433 } 434 } 435 436 NextInterface = NextInterface->Next; 437 } 438 439 return (AE_OK); 440 } 441 442 443 /******************************************************************************* 444 * 445 * FUNCTION: AcpiUtGetInterface 446 * 447 * PARAMETERS: InterfaceName - The interface to find 448 * 449 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 450 * 451 * DESCRIPTION: Search for the specified interface name in the global list. 452 * Caller MUST hold AcpiGbl_OsiMutex 453 * 454 ******************************************************************************/ 455 456 ACPI_INTERFACE_INFO * 457 AcpiUtGetInterface ( 458 ACPI_STRING InterfaceName) 459 { 460 ACPI_INTERFACE_INFO *NextInterface; 461 462 463 NextInterface = AcpiGbl_SupportedInterfaces; 464 while (NextInterface) 465 { 466 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 467 { 468 return (NextInterface); 469 } 470 471 NextInterface = NextInterface->Next; 472 } 473 474 return (NULL); 475 } 476 477 478 /******************************************************************************* 479 * 480 * FUNCTION: AcpiUtOsiImplementation 481 * 482 * PARAMETERS: WalkState - Current walk state 483 * 484 * RETURN: Status 485 * 486 * DESCRIPTION: Implementation of the _OSI predefined control method. When 487 * an invocation of _OSI is encountered in the system AML, 488 * control is transferred to this function. 489 * 490 ******************************************************************************/ 491 492 ACPI_STATUS 493 AcpiUtOsiImplementation ( 494 ACPI_WALK_STATE *WalkState) 495 { 496 ACPI_OPERAND_OBJECT *StringDesc; 497 ACPI_OPERAND_OBJECT *ReturnDesc; 498 ACPI_INTERFACE_INFO *InterfaceInfo; 499 ACPI_INTERFACE_HANDLER InterfaceHandler; 500 ACPI_STATUS Status; 501 UINT32 ReturnValue; 502 503 504 ACPI_FUNCTION_TRACE (UtOsiImplementation); 505 506 507 /* Validate the string input argument (from the AML caller) */ 508 509 StringDesc = WalkState->Arguments[0].Object; 510 if (!StringDesc || 511 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 512 { 513 return_ACPI_STATUS (AE_TYPE); 514 } 515 516 /* Create a return object */ 517 518 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 519 if (!ReturnDesc) 520 { 521 return_ACPI_STATUS (AE_NO_MEMORY); 522 } 523 524 /* Default return value is 0, NOT SUPPORTED */ 525 526 ReturnValue = 0; 527 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 528 if (ACPI_FAILURE (Status)) 529 { 530 AcpiUtRemoveReference (ReturnDesc); 531 return_ACPI_STATUS (Status); 532 } 533 534 /* Lookup the interface in the global _OSI list */ 535 536 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 537 if (InterfaceInfo && 538 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 539 { 540 /* 541 * The interface is supported. 542 * Update the OsiData if necessary. We keep track of the latest 543 * version of Windows that has been requested by the BIOS. 544 */ 545 if (InterfaceInfo->Value > AcpiGbl_OsiData) 546 { 547 AcpiGbl_OsiData = InterfaceInfo->Value; 548 } 549 550 ReturnValue = ACPI_UINT32_MAX; 551 } 552 553 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 554 555 /* 556 * Invoke an optional _OSI interface handler. The host OS may wish 557 * to do some interface-specific handling. For example, warn about 558 * certain interfaces or override the true/false support value. 559 */ 560 InterfaceHandler = AcpiGbl_InterfaceHandler; 561 if (InterfaceHandler) 562 { 563 ReturnValue = InterfaceHandler ( 564 StringDesc->String.Pointer, ReturnValue); 565 } 566 567 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 568 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 569 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 570 571 /* Complete the return object */ 572 573 ReturnDesc->Integer.Value = ReturnValue; 574 WalkState->ReturnDesc = ReturnDesc; 575 return_ACPI_STATUS (AE_OK); 576 } 577