1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 47 48 #define _COMPONENT ACPI_UTILITIES 49 ACPI_MODULE_NAME ("utosi") 50 51 52 /****************************************************************************** 53 * 54 * ACPICA policy for new _OSI strings: 55 * 56 * It is the stated policy of ACPICA that new _OSI strings will be integrated 57 * into this module as soon as possible after they are defined. It is strongly 58 * recommended that all ACPICA hosts mirror this policy and integrate any 59 * changes to this module as soon as possible. There are several historical 60 * reasons behind this policy: 61 * 62 * 1) New BIOSs tend to test only the case where the host responds TRUE to 63 * the latest version of Windows, which would respond to the latest/newest 64 * _OSI string. Not responding TRUE to the latest version of Windows will 65 * risk executing untested code paths throughout the DSDT and SSDTs. 66 * 67 * 2) If a new _OSI string is recognized only after a significant delay, this 68 * has the potential to cause problems on existing working machines because 69 * of the possibility that a new and different path through the ASL code 70 * will be executed. 71 * 72 * 3) New _OSI strings are tending to come out about once per year. A delay 73 * in recognizing a new string for a significant amount of time risks the 74 * release of another string which only compounds the initial problem. 75 * 76 *****************************************************************************/ 77 78 79 /* 80 * Strings supported by the _OSI predefined control method (which is 81 * implemented internally within this module.) 82 * 83 * March 2009: Removed "Linux" as this host no longer wants to respond true 84 * for this string. Basically, the only safe OS strings are windows-related 85 * and in many or most cases represent the only test path within the 86 * BIOS-provided ASL code. 87 * 88 * The last element of each entry is used to track the newest version of 89 * Windows that the BIOS has requested. 90 */ 91 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 92 { 93 /* Operating System Vendor Strings */ 94 95 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 96 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 97 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 98 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 99 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 100 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 101 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 102 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 103 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 104 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 105 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 106 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 107 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 108 {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10}, /* Windows 10 - Added 03/2015 */ 109 110 /* Feature Group Strings */ 111 112 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 113 114 /* 115 * All "optional" feature group strings (features that are implemented 116 * by the host) should be dynamically modified to VALID by the host via 117 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature 118 * group strings are set as INVALID by default here. 119 */ 120 121 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 122 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 123 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 124 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 125 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 126 }; 127 128 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiUtInitializeInterfaces 132 * 133 * PARAMETERS: None 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Initialize the global _OSI supported interfaces list 138 * 139 ******************************************************************************/ 140 141 ACPI_STATUS 142 AcpiUtInitializeInterfaces ( 143 void) 144 { 145 ACPI_STATUS Status; 146 UINT32 i; 147 148 149 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 150 if (ACPI_FAILURE (Status)) 151 { 152 return (Status); 153 } 154 155 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 156 157 /* Link the static list of supported interfaces */ 158 159 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 160 { 161 AcpiDefaultSupportedInterfaces[i].Next = 162 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 163 } 164 165 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 166 return (AE_OK); 167 } 168 169 170 /******************************************************************************* 171 * 172 * FUNCTION: AcpiUtInterfaceTerminate 173 * 174 * PARAMETERS: None 175 * 176 * RETURN: Status 177 * 178 * DESCRIPTION: Delete all interfaces in the global list. Sets 179 * AcpiGbl_SupportedInterfaces to NULL. 180 * 181 ******************************************************************************/ 182 183 ACPI_STATUS 184 AcpiUtInterfaceTerminate ( 185 void) 186 { 187 ACPI_STATUS Status; 188 ACPI_INTERFACE_INFO *NextInterface; 189 190 191 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 192 if (ACPI_FAILURE (Status)) 193 { 194 return (Status); 195 } 196 197 NextInterface = AcpiGbl_SupportedInterfaces; 198 while (NextInterface) 199 { 200 AcpiGbl_SupportedInterfaces = NextInterface->Next; 201 202 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 203 { 204 /* Only interfaces added at runtime can be freed */ 205 206 ACPI_FREE (NextInterface->Name); 207 ACPI_FREE (NextInterface); 208 } 209 else 210 { 211 /* Interface is in static list. Reset it to invalid or valid. */ 212 213 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID) 214 { 215 NextInterface->Flags |= ACPI_OSI_INVALID; 216 } 217 else 218 { 219 NextInterface->Flags &= ~ACPI_OSI_INVALID; 220 } 221 } 222 223 NextInterface = AcpiGbl_SupportedInterfaces; 224 } 225 226 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 227 return (AE_OK); 228 } 229 230 231 /******************************************************************************* 232 * 233 * FUNCTION: AcpiUtInstallInterface 234 * 235 * PARAMETERS: InterfaceName - The interface to install 236 * 237 * RETURN: Status 238 * 239 * DESCRIPTION: Install the interface into the global interface list. 240 * Caller MUST hold AcpiGbl_OsiMutex 241 * 242 ******************************************************************************/ 243 244 ACPI_STATUS 245 AcpiUtInstallInterface ( 246 ACPI_STRING InterfaceName) 247 { 248 ACPI_INTERFACE_INFO *InterfaceInfo; 249 250 251 /* Allocate info block and space for the name string */ 252 253 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 254 if (!InterfaceInfo) 255 { 256 return (AE_NO_MEMORY); 257 } 258 259 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (strlen (InterfaceName) + 1); 260 if (!InterfaceInfo->Name) 261 { 262 ACPI_FREE (InterfaceInfo); 263 return (AE_NO_MEMORY); 264 } 265 266 /* Initialize new info and insert at the head of the global list */ 267 268 strcpy (InterfaceInfo->Name, InterfaceName); 269 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 270 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 271 272 AcpiGbl_SupportedInterfaces = InterfaceInfo; 273 return (AE_OK); 274 } 275 276 277 /******************************************************************************* 278 * 279 * FUNCTION: AcpiUtRemoveInterface 280 * 281 * PARAMETERS: InterfaceName - The interface to remove 282 * 283 * RETURN: Status 284 * 285 * DESCRIPTION: Remove the interface from the global interface list. 286 * Caller MUST hold AcpiGbl_OsiMutex 287 * 288 ******************************************************************************/ 289 290 ACPI_STATUS 291 AcpiUtRemoveInterface ( 292 ACPI_STRING InterfaceName) 293 { 294 ACPI_INTERFACE_INFO *PreviousInterface; 295 ACPI_INTERFACE_INFO *NextInterface; 296 297 298 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 299 while (NextInterface) 300 { 301 if (!strcmp (InterfaceName, NextInterface->Name)) 302 { 303 /* Found: name is in either the static list or was added at runtime */ 304 305 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 306 { 307 /* Interface was added dynamically, remove and free it */ 308 309 if (PreviousInterface == NextInterface) 310 { 311 AcpiGbl_SupportedInterfaces = NextInterface->Next; 312 } 313 else 314 { 315 PreviousInterface->Next = NextInterface->Next; 316 } 317 318 ACPI_FREE (NextInterface->Name); 319 ACPI_FREE (NextInterface); 320 } 321 else 322 { 323 /* 324 * Interface is in static list. If marked invalid, then it 325 * does not actually exist. Else, mark it invalid. 326 */ 327 if (NextInterface->Flags & ACPI_OSI_INVALID) 328 { 329 return (AE_NOT_EXIST); 330 } 331 332 NextInterface->Flags |= ACPI_OSI_INVALID; 333 } 334 335 return (AE_OK); 336 } 337 338 PreviousInterface = NextInterface; 339 NextInterface = NextInterface->Next; 340 } 341 342 /* Interface was not found */ 343 344 return (AE_NOT_EXIST); 345 } 346 347 348 /******************************************************************************* 349 * 350 * FUNCTION: AcpiUtUpdateInterfaces 351 * 352 * PARAMETERS: Action - Actions to be performed during the 353 * update 354 * 355 * RETURN: Status 356 * 357 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 358 * strings or/and feature group strings. 359 * Caller MUST hold AcpiGbl_OsiMutex 360 * 361 ******************************************************************************/ 362 363 ACPI_STATUS 364 AcpiUtUpdateInterfaces ( 365 UINT8 Action) 366 { 367 ACPI_INTERFACE_INFO *NextInterface; 368 369 370 NextInterface = AcpiGbl_SupportedInterfaces; 371 while (NextInterface) 372 { 373 if (((NextInterface->Flags & ACPI_OSI_FEATURE) && 374 (Action & ACPI_FEATURE_STRINGS)) || 375 (!(NextInterface->Flags & ACPI_OSI_FEATURE) && 376 (Action & ACPI_VENDOR_STRINGS))) 377 { 378 if (Action & ACPI_DISABLE_INTERFACES) 379 { 380 /* Mark the interfaces as invalid */ 381 382 NextInterface->Flags |= ACPI_OSI_INVALID; 383 } 384 else 385 { 386 /* Mark the interfaces as valid */ 387 388 NextInterface->Flags &= ~ACPI_OSI_INVALID; 389 } 390 } 391 392 NextInterface = NextInterface->Next; 393 } 394 395 return (AE_OK); 396 } 397 398 399 /******************************************************************************* 400 * 401 * FUNCTION: AcpiUtGetInterface 402 * 403 * PARAMETERS: InterfaceName - The interface to find 404 * 405 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 406 * 407 * DESCRIPTION: Search for the specified interface name in the global list. 408 * Caller MUST hold AcpiGbl_OsiMutex 409 * 410 ******************************************************************************/ 411 412 ACPI_INTERFACE_INFO * 413 AcpiUtGetInterface ( 414 ACPI_STRING InterfaceName) 415 { 416 ACPI_INTERFACE_INFO *NextInterface; 417 418 419 NextInterface = AcpiGbl_SupportedInterfaces; 420 while (NextInterface) 421 { 422 if (!strcmp (InterfaceName, NextInterface->Name)) 423 { 424 return (NextInterface); 425 } 426 427 NextInterface = NextInterface->Next; 428 } 429 430 return (NULL); 431 } 432 433 434 /******************************************************************************* 435 * 436 * FUNCTION: AcpiUtOsiImplementation 437 * 438 * PARAMETERS: WalkState - Current walk state 439 * 440 * RETURN: Status 441 * 442 * DESCRIPTION: Implementation of the _OSI predefined control method. When 443 * an invocation of _OSI is encountered in the system AML, 444 * control is transferred to this function. 445 * 446 ******************************************************************************/ 447 448 ACPI_STATUS 449 AcpiUtOsiImplementation ( 450 ACPI_WALK_STATE *WalkState) 451 { 452 ACPI_OPERAND_OBJECT *StringDesc; 453 ACPI_OPERAND_OBJECT *ReturnDesc; 454 ACPI_INTERFACE_INFO *InterfaceInfo; 455 ACPI_INTERFACE_HANDLER InterfaceHandler; 456 ACPI_STATUS Status; 457 UINT32 ReturnValue; 458 459 460 ACPI_FUNCTION_TRACE (UtOsiImplementation); 461 462 463 /* Validate the string input argument (from the AML caller) */ 464 465 StringDesc = WalkState->Arguments[0].Object; 466 if (!StringDesc || 467 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 468 { 469 return_ACPI_STATUS (AE_TYPE); 470 } 471 472 /* Create a return object */ 473 474 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 475 if (!ReturnDesc) 476 { 477 return_ACPI_STATUS (AE_NO_MEMORY); 478 } 479 480 /* Default return value is 0, NOT SUPPORTED */ 481 482 ReturnValue = 0; 483 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 484 if (ACPI_FAILURE (Status)) 485 { 486 AcpiUtRemoveReference (ReturnDesc); 487 return_ACPI_STATUS (Status); 488 } 489 490 /* Lookup the interface in the global _OSI list */ 491 492 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 493 if (InterfaceInfo && 494 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 495 { 496 /* 497 * The interface is supported. 498 * Update the OsiData if necessary. We keep track of the latest 499 * version of Windows that has been requested by the BIOS. 500 */ 501 if (InterfaceInfo->Value > AcpiGbl_OsiData) 502 { 503 AcpiGbl_OsiData = InterfaceInfo->Value; 504 } 505 506 ReturnValue = ACPI_UINT32_MAX; 507 } 508 509 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 510 511 /* 512 * Invoke an optional _OSI interface handler. The host OS may wish 513 * to do some interface-specific handling. For example, warn about 514 * certain interfaces or override the true/false support value. 515 */ 516 InterfaceHandler = AcpiGbl_InterfaceHandler; 517 if (InterfaceHandler) 518 { 519 ReturnValue = InterfaceHandler ( 520 StringDesc->String.Pointer, ReturnValue); 521 } 522 523 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 524 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 525 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 526 527 /* Complete the return object */ 528 529 ReturnDesc->Integer.Value = ReturnValue; 530 WalkState->ReturnDesc = ReturnDesc; 531 return_ACPI_STATUS (AE_OK); 532 } 533