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 - 2014, 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 /****************************************************************************** 127 * 128 * ACPICA policy for new _OSI strings: 129 * 130 * It is the stated policy of ACPICA that new _OSI strings will be integrated 131 * into this module as soon as possible after they are defined. It is strongly 132 * recommended that all ACPICA hosts mirror this policy and integrate any 133 * changes to this module as soon as possible. There are several historical 134 * reasons behind this policy: 135 * 136 * 1) New BIOSs tend to test only the case where the host responds TRUE to 137 * the latest version of Windows, which would respond to the latest/newest 138 * _OSI string. Not responding TRUE to the latest version of Windows will 139 * risk executing untested code paths throughout the DSDT and SSDTs. 140 * 141 * 2) If a new _OSI string is recognized only after a significant delay, this 142 * has the potential to cause problems on existing working machines because 143 * of the possibility that a new and different path through the ASL code 144 * will be executed. 145 * 146 * 3) New _OSI strings are tending to come out about once per year. A delay 147 * in recognizing a new string for a significant amount of time risks the 148 * release of another string which only compounds the initial problem. 149 * 150 *****************************************************************************/ 151 152 153 /* 154 * Strings supported by the _OSI predefined control method (which is 155 * implemented internally within this module.) 156 * 157 * March 2009: Removed "Linux" as this host no longer wants to respond true 158 * for this string. Basically, the only safe OS strings are windows-related 159 * and in many or most cases represent the only test path within the 160 * BIOS-provided ASL code. 161 * 162 * The last element of each entry is used to track the newest version of 163 * Windows that the BIOS has requested. 164 */ 165 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 166 { 167 /* Operating System Vendor Strings */ 168 169 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 170 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 171 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 172 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 173 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 174 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 175 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 176 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 177 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 178 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 179 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 180 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 181 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 182 183 /* Feature Group Strings */ 184 185 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 186 187 /* 188 * All "optional" feature group strings (features that are implemented 189 * by the host) should be dynamically modified to VALID by the host via 190 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature 191 * group strings are set as INVALID by default here. 192 */ 193 194 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 195 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 196 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 197 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 198 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 199 }; 200 201 202 /******************************************************************************* 203 * 204 * FUNCTION: AcpiUtInitializeInterfaces 205 * 206 * PARAMETERS: None 207 * 208 * RETURN: Status 209 * 210 * DESCRIPTION: Initialize the global _OSI supported interfaces list 211 * 212 ******************************************************************************/ 213 214 ACPI_STATUS 215 AcpiUtInitializeInterfaces ( 216 void) 217 { 218 ACPI_STATUS Status; 219 UINT32 i; 220 221 222 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 223 if (ACPI_FAILURE (Status)) 224 { 225 return (Status); 226 } 227 228 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 229 230 /* Link the static list of supported interfaces */ 231 232 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 233 { 234 AcpiDefaultSupportedInterfaces[i].Next = 235 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 236 } 237 238 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 239 return (AE_OK); 240 } 241 242 243 /******************************************************************************* 244 * 245 * FUNCTION: AcpiUtInterfaceTerminate 246 * 247 * PARAMETERS: None 248 * 249 * RETURN: Status 250 * 251 * DESCRIPTION: Delete all interfaces in the global list. Sets 252 * AcpiGbl_SupportedInterfaces to NULL. 253 * 254 ******************************************************************************/ 255 256 ACPI_STATUS 257 AcpiUtInterfaceTerminate ( 258 void) 259 { 260 ACPI_STATUS Status; 261 ACPI_INTERFACE_INFO *NextInterface; 262 263 264 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 265 if (ACPI_FAILURE (Status)) 266 { 267 return (Status); 268 } 269 270 NextInterface = AcpiGbl_SupportedInterfaces; 271 while (NextInterface) 272 { 273 AcpiGbl_SupportedInterfaces = NextInterface->Next; 274 275 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 276 { 277 /* Only interfaces added at runtime can be freed */ 278 279 ACPI_FREE (NextInterface->Name); 280 ACPI_FREE (NextInterface); 281 } 282 else 283 { 284 /* Interface is in static list. Reset it to invalid or valid. */ 285 286 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID) 287 { 288 NextInterface->Flags |= ACPI_OSI_INVALID; 289 } 290 else 291 { 292 NextInterface->Flags &= ~ACPI_OSI_INVALID; 293 } 294 } 295 296 NextInterface = AcpiGbl_SupportedInterfaces; 297 } 298 299 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 300 return (AE_OK); 301 } 302 303 304 /******************************************************************************* 305 * 306 * FUNCTION: AcpiUtInstallInterface 307 * 308 * PARAMETERS: InterfaceName - The interface to install 309 * 310 * RETURN: Status 311 * 312 * DESCRIPTION: Install the interface into the global interface list. 313 * Caller MUST hold AcpiGbl_OsiMutex 314 * 315 ******************************************************************************/ 316 317 ACPI_STATUS 318 AcpiUtInstallInterface ( 319 ACPI_STRING InterfaceName) 320 { 321 ACPI_INTERFACE_INFO *InterfaceInfo; 322 323 324 /* Allocate info block and space for the name string */ 325 326 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 327 if (!InterfaceInfo) 328 { 329 return (AE_NO_MEMORY); 330 } 331 332 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 333 if (!InterfaceInfo->Name) 334 { 335 ACPI_FREE (InterfaceInfo); 336 return (AE_NO_MEMORY); 337 } 338 339 /* Initialize new info and insert at the head of the global list */ 340 341 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 342 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 343 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 344 345 AcpiGbl_SupportedInterfaces = InterfaceInfo; 346 return (AE_OK); 347 } 348 349 350 /******************************************************************************* 351 * 352 * FUNCTION: AcpiUtRemoveInterface 353 * 354 * PARAMETERS: InterfaceName - The interface to remove 355 * 356 * RETURN: Status 357 * 358 * DESCRIPTION: Remove the interface from the global interface list. 359 * Caller MUST hold AcpiGbl_OsiMutex 360 * 361 ******************************************************************************/ 362 363 ACPI_STATUS 364 AcpiUtRemoveInterface ( 365 ACPI_STRING InterfaceName) 366 { 367 ACPI_INTERFACE_INFO *PreviousInterface; 368 ACPI_INTERFACE_INFO *NextInterface; 369 370 371 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 372 while (NextInterface) 373 { 374 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 375 { 376 /* Found: name is in either the static list or was added at runtime */ 377 378 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 379 { 380 /* Interface was added dynamically, remove and free it */ 381 382 if (PreviousInterface == NextInterface) 383 { 384 AcpiGbl_SupportedInterfaces = NextInterface->Next; 385 } 386 else 387 { 388 PreviousInterface->Next = NextInterface->Next; 389 } 390 391 ACPI_FREE (NextInterface->Name); 392 ACPI_FREE (NextInterface); 393 } 394 else 395 { 396 /* 397 * Interface is in static list. If marked invalid, then it 398 * does not actually exist. Else, mark it invalid. 399 */ 400 if (NextInterface->Flags & ACPI_OSI_INVALID) 401 { 402 return (AE_NOT_EXIST); 403 } 404 405 NextInterface->Flags |= ACPI_OSI_INVALID; 406 } 407 408 return (AE_OK); 409 } 410 411 PreviousInterface = NextInterface; 412 NextInterface = NextInterface->Next; 413 } 414 415 /* Interface was not found */ 416 417 return (AE_NOT_EXIST); 418 } 419 420 421 /******************************************************************************* 422 * 423 * FUNCTION: AcpiUtUpdateInterfaces 424 * 425 * PARAMETERS: Action - Actions to be performed during the 426 * update 427 * 428 * RETURN: Status 429 * 430 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 431 * strings or/and feature group strings. 432 * Caller MUST hold AcpiGbl_OsiMutex 433 * 434 ******************************************************************************/ 435 436 ACPI_STATUS 437 AcpiUtUpdateInterfaces ( 438 UINT8 Action) 439 { 440 ACPI_INTERFACE_INFO *NextInterface; 441 442 443 NextInterface = AcpiGbl_SupportedInterfaces; 444 while (NextInterface) 445 { 446 if (((NextInterface->Flags & ACPI_OSI_FEATURE) && 447 (Action & ACPI_FEATURE_STRINGS)) || 448 (!(NextInterface->Flags & ACPI_OSI_FEATURE) && 449 (Action & ACPI_VENDOR_STRINGS))) 450 { 451 if (Action & ACPI_DISABLE_INTERFACES) 452 { 453 /* Mark the interfaces as invalid */ 454 455 NextInterface->Flags |= ACPI_OSI_INVALID; 456 } 457 else 458 { 459 /* Mark the interfaces as valid */ 460 461 NextInterface->Flags &= ~ACPI_OSI_INVALID; 462 } 463 } 464 465 NextInterface = NextInterface->Next; 466 } 467 468 return (AE_OK); 469 } 470 471 472 /******************************************************************************* 473 * 474 * FUNCTION: AcpiUtGetInterface 475 * 476 * PARAMETERS: InterfaceName - The interface to find 477 * 478 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 479 * 480 * DESCRIPTION: Search for the specified interface name in the global list. 481 * Caller MUST hold AcpiGbl_OsiMutex 482 * 483 ******************************************************************************/ 484 485 ACPI_INTERFACE_INFO * 486 AcpiUtGetInterface ( 487 ACPI_STRING InterfaceName) 488 { 489 ACPI_INTERFACE_INFO *NextInterface; 490 491 492 NextInterface = AcpiGbl_SupportedInterfaces; 493 while (NextInterface) 494 { 495 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 496 { 497 return (NextInterface); 498 } 499 500 NextInterface = NextInterface->Next; 501 } 502 503 return (NULL); 504 } 505 506 507 /******************************************************************************* 508 * 509 * FUNCTION: AcpiUtOsiImplementation 510 * 511 * PARAMETERS: WalkState - Current walk state 512 * 513 * RETURN: Status 514 * 515 * DESCRIPTION: Implementation of the _OSI predefined control method. When 516 * an invocation of _OSI is encountered in the system AML, 517 * control is transferred to this function. 518 * 519 ******************************************************************************/ 520 521 ACPI_STATUS 522 AcpiUtOsiImplementation ( 523 ACPI_WALK_STATE *WalkState) 524 { 525 ACPI_OPERAND_OBJECT *StringDesc; 526 ACPI_OPERAND_OBJECT *ReturnDesc; 527 ACPI_INTERFACE_INFO *InterfaceInfo; 528 ACPI_INTERFACE_HANDLER InterfaceHandler; 529 ACPI_STATUS Status; 530 UINT32 ReturnValue; 531 532 533 ACPI_FUNCTION_TRACE (UtOsiImplementation); 534 535 536 /* Validate the string input argument (from the AML caller) */ 537 538 StringDesc = WalkState->Arguments[0].Object; 539 if (!StringDesc || 540 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 541 { 542 return_ACPI_STATUS (AE_TYPE); 543 } 544 545 /* Create a return object */ 546 547 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 548 if (!ReturnDesc) 549 { 550 return_ACPI_STATUS (AE_NO_MEMORY); 551 } 552 553 /* Default return value is 0, NOT SUPPORTED */ 554 555 ReturnValue = 0; 556 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 557 if (ACPI_FAILURE (Status)) 558 { 559 AcpiUtRemoveReference (ReturnDesc); 560 return_ACPI_STATUS (Status); 561 } 562 563 /* Lookup the interface in the global _OSI list */ 564 565 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 566 if (InterfaceInfo && 567 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 568 { 569 /* 570 * The interface is supported. 571 * Update the OsiData if necessary. We keep track of the latest 572 * version of Windows that has been requested by the BIOS. 573 */ 574 if (InterfaceInfo->Value > AcpiGbl_OsiData) 575 { 576 AcpiGbl_OsiData = InterfaceInfo->Value; 577 } 578 579 ReturnValue = ACPI_UINT32_MAX; 580 } 581 582 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 583 584 /* 585 * Invoke an optional _OSI interface handler. The host OS may wish 586 * to do some interface-specific handling. For example, warn about 587 * certain interfaces or override the true/false support value. 588 */ 589 InterfaceHandler = AcpiGbl_InterfaceHandler; 590 if (InterfaceHandler) 591 { 592 ReturnValue = InterfaceHandler ( 593 StringDesc->String.Pointer, ReturnValue); 594 } 595 596 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 597 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 598 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 599 600 /* Complete the return object */ 601 602 ReturnDesc->Integer.Value = ReturnValue; 603 WalkState->ReturnDesc = ReturnDesc; 604 return_ACPI_STATUS (AE_OK); 605 } 606