1 /****************************************************************************** 2 * 3 * Module Name: nsrepair2 - Repair for objects returned by specific 4 * predefined methods 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2023, Intel Corp. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include "acpi.h" 46 #include "accommon.h" 47 #include "acnamesp.h" 48 49 #define _COMPONENT ACPI_NAMESPACE 50 ACPI_MODULE_NAME ("nsrepair2") 51 52 53 /* 54 * Information structure and handler for ACPI predefined names that can 55 * be repaired on a per-name basis. 56 */ 57 typedef 58 ACPI_STATUS (*ACPI_REPAIR_FUNCTION) ( 59 ACPI_EVALUATE_INFO *Info, 60 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 61 62 typedef struct acpi_repair_info 63 { 64 char Name[ACPI_NAMESEG_SIZE]; 65 ACPI_REPAIR_FUNCTION RepairFunction; 66 67 } ACPI_REPAIR_INFO; 68 69 70 /* Local prototypes */ 71 72 static const ACPI_REPAIR_INFO * 73 AcpiNsMatchComplexRepair ( 74 ACPI_NAMESPACE_NODE *Node); 75 76 static ACPI_STATUS 77 AcpiNsRepair_ALR ( 78 ACPI_EVALUATE_INFO *Info, 79 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 80 81 static ACPI_STATUS 82 AcpiNsRepair_CID ( 83 ACPI_EVALUATE_INFO *Info, 84 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 85 86 static ACPI_STATUS 87 AcpiNsRepair_CST ( 88 ACPI_EVALUATE_INFO *Info, 89 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 90 91 static ACPI_STATUS 92 AcpiNsRepair_FDE ( 93 ACPI_EVALUATE_INFO *Info, 94 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 95 96 static ACPI_STATUS 97 AcpiNsRepair_HID ( 98 ACPI_EVALUATE_INFO *Info, 99 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 100 101 static ACPI_STATUS 102 AcpiNsRepair_PRT ( 103 ACPI_EVALUATE_INFO *Info, 104 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 105 106 static ACPI_STATUS 107 AcpiNsRepair_PSS ( 108 ACPI_EVALUATE_INFO *Info, 109 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 110 111 static ACPI_STATUS 112 AcpiNsRepair_TSS ( 113 ACPI_EVALUATE_INFO *Info, 114 ACPI_OPERAND_OBJECT **ReturnObjectPtr); 115 116 static ACPI_STATUS 117 AcpiNsCheckSortedList ( 118 ACPI_EVALUATE_INFO *Info, 119 ACPI_OPERAND_OBJECT *ReturnObject, 120 UINT32 StartIndex, 121 UINT32 ExpectedCount, 122 UINT32 SortIndex, 123 UINT8 SortDirection, 124 const char *SortKeyName); 125 126 /* Values for SortDirection above */ 127 128 #define ACPI_SORT_ASCENDING 0 129 #define ACPI_SORT_DESCENDING 1 130 131 static void 132 AcpiNsRemoveElement ( 133 ACPI_OPERAND_OBJECT *ObjDesc, 134 UINT32 Index); 135 136 static void 137 AcpiNsSortList ( 138 ACPI_OPERAND_OBJECT **Elements, 139 UINT32 Count, 140 UINT32 Index, 141 UINT8 SortDirection); 142 143 144 /* 145 * This table contains the names of the predefined methods for which we can 146 * perform more complex repairs. 147 * 148 * As necessary: 149 * 150 * _ALR: Sort the list ascending by AmbientIlluminance 151 * _CID: Strings: uppercase all, remove any leading asterisk 152 * _CST: Sort the list ascending by C state type 153 * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs 154 * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs 155 * _HID: Strings: uppercase all, remove any leading asterisk 156 * _PRT: Fix reversed SourceName and SourceIndex 157 * _PSS: Sort the list descending by Power 158 * _TSS: Sort the list descending by Power 159 * 160 * Names that must be packages, but cannot be sorted: 161 * 162 * _BCL: Values are tied to the Package index where they appear, and cannot 163 * be moved or sorted. These index values are used for _BQC and _BCM. 164 * However, we can fix the case where a buffer is returned, by converting 165 * it to a Package of integers. 166 */ 167 static const ACPI_REPAIR_INFO AcpiNsRepairableNames[] = 168 { 169 {"_ALR", AcpiNsRepair_ALR}, 170 {"_CID", AcpiNsRepair_CID}, 171 {"_CST", AcpiNsRepair_CST}, 172 {"_FDE", AcpiNsRepair_FDE}, 173 {"_GTM", AcpiNsRepair_FDE}, /* _GTM has same repair as _FDE */ 174 {"_HID", AcpiNsRepair_HID}, 175 {"_PRT", AcpiNsRepair_PRT}, 176 {"_PSS", AcpiNsRepair_PSS}, 177 {"_TSS", AcpiNsRepair_TSS}, 178 {{0,0,0,0}, NULL} /* Table terminator */ 179 }; 180 181 182 #define ACPI_FDE_FIELD_COUNT 5 183 #define ACPI_FDE_BYTE_BUFFER_SIZE 5 184 #define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * (UINT32) sizeof (UINT32)) 185 186 187 /****************************************************************************** 188 * 189 * FUNCTION: AcpiNsComplexRepairs 190 * 191 * PARAMETERS: Info - Method execution information block 192 * Node - Namespace node for the method/object 193 * ValidateStatus - Original status of earlier validation 194 * ReturnObjectPtr - Pointer to the object returned from the 195 * evaluation of a method or object 196 * 197 * RETURN: Status. AE_OK if repair was successful. If name is not 198 * matched, ValidateStatus is returned. 199 * 200 * DESCRIPTION: Attempt to repair/convert a return object of a type that was 201 * not expected. 202 * 203 *****************************************************************************/ 204 205 ACPI_STATUS 206 AcpiNsComplexRepairs ( 207 ACPI_EVALUATE_INFO *Info, 208 ACPI_NAMESPACE_NODE *Node, 209 ACPI_STATUS ValidateStatus, 210 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 211 { 212 const ACPI_REPAIR_INFO *Predefined; 213 ACPI_STATUS Status; 214 215 216 ACPI_FUNCTION_TRACE (NsComplexRepairs); 217 218 /* Check if this name is in the list of repairable names */ 219 220 Predefined = AcpiNsMatchComplexRepair (Node); 221 if (!Predefined) 222 { 223 return_ACPI_STATUS (ValidateStatus); 224 } 225 226 Status = Predefined->RepairFunction (Info, ReturnObjectPtr); 227 return_ACPI_STATUS (Status); 228 } 229 230 231 /****************************************************************************** 232 * 233 * FUNCTION: AcpiNsMatchComplexRepair 234 * 235 * PARAMETERS: Node - Namespace node for the method/object 236 * 237 * RETURN: Pointer to entry in repair table. NULL indicates not found. 238 * 239 * DESCRIPTION: Check an object name against the repairable object list. 240 * 241 *****************************************************************************/ 242 243 static const ACPI_REPAIR_INFO * 244 AcpiNsMatchComplexRepair ( 245 ACPI_NAMESPACE_NODE *Node) 246 { 247 const ACPI_REPAIR_INFO *ThisName; 248 249 250 /* Search info table for a repairable predefined method/object name */ 251 252 ThisName = AcpiNsRepairableNames; 253 while (ThisName->RepairFunction) 254 { 255 if (ACPI_COMPARE_NAMESEG (Node->Name.Ascii, ThisName->Name)) 256 { 257 return (ThisName); 258 } 259 260 ThisName++; 261 } 262 263 return (NULL); /* Not found */ 264 } 265 266 267 /****************************************************************************** 268 * 269 * FUNCTION: AcpiNsRepair_ALR 270 * 271 * PARAMETERS: Info - Method execution information block 272 * ReturnObjectPtr - Pointer to the object returned from the 273 * evaluation of a method or object 274 * 275 * RETURN: Status. AE_OK if object is OK or was repaired successfully 276 * 277 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list 278 * ascending by the ambient illuminance values. 279 * 280 *****************************************************************************/ 281 282 static ACPI_STATUS 283 AcpiNsRepair_ALR ( 284 ACPI_EVALUATE_INFO *Info, 285 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 286 { 287 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 288 ACPI_STATUS Status; 289 290 291 Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 2, 1, 292 ACPI_SORT_ASCENDING, "AmbientIlluminance"); 293 294 return (Status); 295 } 296 297 298 /****************************************************************************** 299 * 300 * FUNCTION: AcpiNsRepair_FDE 301 * 302 * PARAMETERS: Info - Method execution information block 303 * ReturnObjectPtr - Pointer to the object returned from the 304 * evaluation of a method or object 305 * 306 * RETURN: Status. AE_OK if object is OK or was repaired successfully 307 * 308 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return 309 * value is a Buffer of 5 DWORDs. This function repairs a common 310 * problem where the return value is a Buffer of BYTEs, not 311 * DWORDs. 312 * 313 *****************************************************************************/ 314 315 static ACPI_STATUS 316 AcpiNsRepair_FDE ( 317 ACPI_EVALUATE_INFO *Info, 318 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 319 { 320 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 321 ACPI_OPERAND_OBJECT *BufferObject; 322 UINT8 *ByteBuffer; 323 UINT32 *DwordBuffer; 324 UINT32 i; 325 326 327 ACPI_FUNCTION_NAME (NsRepair_FDE); 328 329 330 switch (ReturnObject->Common.Type) 331 { 332 case ACPI_TYPE_BUFFER: 333 334 /* This is the expected type. Length should be (at least) 5 DWORDs */ 335 336 if (ReturnObject->Buffer.Length >= ACPI_FDE_DWORD_BUFFER_SIZE) 337 { 338 return (AE_OK); 339 } 340 341 /* We can only repair if we have exactly 5 BYTEs */ 342 343 if (ReturnObject->Buffer.Length != ACPI_FDE_BYTE_BUFFER_SIZE) 344 { 345 ACPI_WARN_PREDEFINED ((AE_INFO, 346 Info->FullPathname, Info->NodeFlags, 347 "Incorrect return buffer length %u, expected %u", 348 ReturnObject->Buffer.Length, ACPI_FDE_DWORD_BUFFER_SIZE)); 349 350 return (AE_AML_OPERAND_TYPE); 351 } 352 353 /* Create the new (larger) buffer object */ 354 355 BufferObject = AcpiUtCreateBufferObject ( 356 ACPI_FDE_DWORD_BUFFER_SIZE); 357 if (!BufferObject) 358 { 359 return (AE_NO_MEMORY); 360 } 361 362 /* Expand each byte to a DWORD */ 363 364 ByteBuffer = ReturnObject->Buffer.Pointer; 365 DwordBuffer = ACPI_CAST_PTR (UINT32, 366 BufferObject->Buffer.Pointer); 367 368 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) 369 { 370 *DwordBuffer = (UINT32) *ByteBuffer; 371 DwordBuffer++; 372 ByteBuffer++; 373 } 374 375 ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, 376 "%s Expanded Byte Buffer to expected DWord Buffer\n", 377 Info->FullPathname)); 378 break; 379 380 default: 381 382 return (AE_AML_OPERAND_TYPE); 383 } 384 385 /* Delete the original return object, return the new buffer object */ 386 387 AcpiUtRemoveReference (ReturnObject); 388 *ReturnObjectPtr = BufferObject; 389 390 Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; 391 return (AE_OK); 392 } 393 394 395 /****************************************************************************** 396 * 397 * FUNCTION: AcpiNsRepair_CID 398 * 399 * PARAMETERS: Info - Method execution information block 400 * ReturnObjectPtr - Pointer to the object returned from the 401 * evaluation of a method or object 402 * 403 * RETURN: Status. AE_OK if object is OK or was repaired successfully 404 * 405 * DESCRIPTION: Repair for the _CID object. If a string, ensure that all 406 * letters are uppercase and that there is no leading asterisk. 407 * If a Package, ensure same for all string elements. 408 * 409 *****************************************************************************/ 410 411 static ACPI_STATUS 412 AcpiNsRepair_CID ( 413 ACPI_EVALUATE_INFO *Info, 414 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 415 { 416 ACPI_STATUS Status; 417 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 418 ACPI_OPERAND_OBJECT **ElementPtr; 419 ACPI_OPERAND_OBJECT *OriginalElement; 420 UINT16 OriginalRefCount; 421 UINT32 i; 422 423 ACPI_FUNCTION_TRACE (NsRepair_CID); 424 425 /* Check for _CID as a simple string */ 426 427 if (ReturnObject->Common.Type == ACPI_TYPE_STRING) 428 { 429 Status = AcpiNsRepair_HID (Info, ReturnObjectPtr); 430 return_ACPI_STATUS (Status); 431 } 432 433 /* Exit if not a Package */ 434 435 if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) 436 { 437 return_ACPI_STATUS (AE_OK); 438 } 439 440 /* Examine each element of the _CID package */ 441 442 ElementPtr = ReturnObject->Package.Elements; 443 for (i = 0; i < ReturnObject->Package.Count; i++) 444 { 445 OriginalElement = *ElementPtr; 446 OriginalRefCount = OriginalElement->Common.ReferenceCount; 447 448 Status = AcpiNsRepair_HID (Info, ElementPtr); 449 if (ACPI_FAILURE (Status)) 450 { 451 return_ACPI_STATUS (Status); 452 } 453 454 if (OriginalElement != *ElementPtr) 455 { 456 /* Update reference count of new object */ 457 458 (*ElementPtr)->Common.ReferenceCount = 459 OriginalRefCount; 460 } 461 462 ElementPtr++; 463 } 464 465 return_ACPI_STATUS (AE_OK); 466 } 467 468 469 /****************************************************************************** 470 * 471 * FUNCTION: AcpiNsRepair_CST 472 * 473 * PARAMETERS: Info - Method execution information block 474 * ReturnObjectPtr - Pointer to the object returned from the 475 * evaluation of a method or object 476 * 477 * RETURN: Status. AE_OK if object is OK or was repaired successfully 478 * 479 * DESCRIPTION: Repair for the _CST object: 480 * 1. Sort the list ascending by C state type 481 * 2. Ensure type cannot be zero 482 * 3. A subpackage count of zero means _CST is meaningless 483 * 4. Count must match the number of C state subpackages 484 * 485 *****************************************************************************/ 486 487 static ACPI_STATUS 488 AcpiNsRepair_CST ( 489 ACPI_EVALUATE_INFO *Info, 490 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 491 { 492 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 493 ACPI_OPERAND_OBJECT **OuterElements; 494 UINT32 OuterElementCount; 495 ACPI_OPERAND_OBJECT *ObjDesc; 496 ACPI_STATUS Status; 497 BOOLEAN Removing; 498 UINT32 i; 499 500 501 ACPI_FUNCTION_NAME (NsRepair_CST); 502 503 504 /* 505 * Check if the C-state type values are proportional. 506 */ 507 OuterElementCount = ReturnObject->Package.Count - 1; 508 i = 0; 509 while (i < OuterElementCount) 510 { 511 OuterElements = &ReturnObject->Package.Elements[i + 1]; 512 Removing = FALSE; 513 514 if ((*OuterElements)->Package.Count == 0) 515 { 516 ACPI_WARN_PREDEFINED ((AE_INFO, 517 Info->FullPathname, Info->NodeFlags, 518 "SubPackage[%u] - removing entry due to zero count", i)); 519 Removing = TRUE; 520 goto RemoveElement; 521 } 522 523 ObjDesc = (*OuterElements)->Package.Elements[1]; /* Index1 = Type */ 524 if ((UINT32) ObjDesc->Integer.Value == 0) 525 { 526 ACPI_WARN_PREDEFINED ((AE_INFO, 527 Info->FullPathname, Info->NodeFlags, 528 "SubPackage[%u] - removing entry due to invalid Type(0)", i)); 529 Removing = TRUE; 530 } 531 532 RemoveElement: 533 if (Removing) 534 { 535 AcpiNsRemoveElement (ReturnObject, i + 1); 536 OuterElementCount--; 537 } 538 else 539 { 540 i++; 541 } 542 } 543 544 /* Update top-level package count, Type "Integer" checked elsewhere */ 545 546 ObjDesc = ReturnObject->Package.Elements[0]; 547 ObjDesc->Integer.Value = OuterElementCount; 548 549 /* 550 * Entries (subpackages) in the _CST Package must be sorted by the 551 * C-state type, in ascending order. 552 */ 553 Status = AcpiNsCheckSortedList (Info, ReturnObject, 1, 4, 1, 554 ACPI_SORT_ASCENDING, "C-State Type"); 555 if (ACPI_FAILURE (Status)) 556 { 557 return (Status); 558 } 559 560 return (AE_OK); 561 } 562 563 564 /****************************************************************************** 565 * 566 * FUNCTION: AcpiNsRepair_HID 567 * 568 * PARAMETERS: Info - Method execution information block 569 * ReturnObjectPtr - Pointer to the object returned from the 570 * evaluation of a method or object 571 * 572 * RETURN: Status. AE_OK if object is OK or was repaired successfully 573 * 574 * DESCRIPTION: Repair for the _HID object. If a string, ensure that all 575 * letters are uppercase and that there is no leading asterisk. 576 * 577 *****************************************************************************/ 578 579 static ACPI_STATUS 580 AcpiNsRepair_HID ( 581 ACPI_EVALUATE_INFO *Info, 582 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 583 { 584 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 585 ACPI_OPERAND_OBJECT *NewString; 586 char *Source; 587 char *Dest; 588 589 590 ACPI_FUNCTION_TRACE (NsRepair_HID); 591 592 593 /* We only care about string _HID objects (not integers) */ 594 595 if (ReturnObject->Common.Type != ACPI_TYPE_STRING) 596 { 597 return_ACPI_STATUS (AE_OK); 598 } 599 600 if (ReturnObject->String.Length == 0) 601 { 602 ACPI_WARN_PREDEFINED ((AE_INFO, 603 Info->FullPathname, Info->NodeFlags, 604 "Invalid zero-length _HID or _CID string")); 605 606 /* Return AE_OK anyway, let driver handle it */ 607 608 Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; 609 return_ACPI_STATUS (AE_OK); 610 } 611 612 /* It is simplest to always create a new string object */ 613 614 NewString = AcpiUtCreateStringObject (ReturnObject->String.Length); 615 if (!NewString) 616 { 617 return_ACPI_STATUS (AE_NO_MEMORY); 618 } 619 620 /* 621 * Remove a leading asterisk if present. For some unknown reason, there 622 * are many machines in the field that contains IDs like this. 623 * 624 * Examples: "*PNP0C03", "*ACPI0003" 625 */ 626 Source = ReturnObject->String.Pointer; 627 if (*Source == '*') 628 { 629 Source++; 630 NewString->String.Length--; 631 632 ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, 633 "%s: Removed invalid leading asterisk\n", Info->FullPathname)); 634 } 635 636 /* 637 * Copy and uppercase the string. From the ACPI 5.0 specification: 638 * 639 * A valid PNP ID must be of the form "AAA####" where A is an uppercase 640 * letter and # is a hex digit. A valid ACPI ID must be of the form 641 * "NNNN####" where N is an uppercase letter or decimal digit, and 642 * # is a hex digit. 643 */ 644 for (Dest = NewString->String.Pointer; *Source; Dest++, Source++) 645 { 646 *Dest = (char) toupper ((int) *Source); 647 } 648 649 AcpiUtRemoveReference (ReturnObject); 650 *ReturnObjectPtr = NewString; 651 return_ACPI_STATUS (AE_OK); 652 } 653 654 655 /****************************************************************************** 656 * 657 * FUNCTION: AcpiNsRepair_PRT 658 * 659 * PARAMETERS: Info - Method execution information block 660 * ReturnObjectPtr - Pointer to the object returned from the 661 * evaluation of a method or object 662 * 663 * RETURN: Status. AE_OK if object is OK or was repaired successfully 664 * 665 * DESCRIPTION: Repair for the _PRT object. If necessary, fix reversed 666 * SourceName and SourceIndex field, a common BIOS bug. 667 * 668 *****************************************************************************/ 669 670 static ACPI_STATUS 671 AcpiNsRepair_PRT ( 672 ACPI_EVALUATE_INFO *Info, 673 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 674 { 675 ACPI_OPERAND_OBJECT *PackageObject = *ReturnObjectPtr; 676 ACPI_OPERAND_OBJECT **TopObjectList; 677 ACPI_OPERAND_OBJECT **SubObjectList; 678 ACPI_OPERAND_OBJECT *ObjDesc; 679 ACPI_OPERAND_OBJECT *SubPackage; 680 UINT32 ElementCount; 681 UINT32 Index; 682 683 684 /* Each element in the _PRT package is a subpackage */ 685 686 TopObjectList = PackageObject->Package.Elements; 687 ElementCount = PackageObject->Package.Count; 688 689 /* Examine each subpackage */ 690 691 for (Index = 0; Index < ElementCount; Index++, TopObjectList++) 692 { 693 SubPackage = *TopObjectList; 694 SubObjectList = SubPackage->Package.Elements; 695 696 /* Check for minimum required element count */ 697 698 if (SubPackage->Package.Count < 4) 699 { 700 continue; 701 } 702 703 /* 704 * If the BIOS has erroneously reversed the _PRT SourceName (index 2) 705 * and the SourceIndex (index 3), fix it. _PRT is important enough to 706 * workaround this BIOS error. This also provides compatibility with 707 * other ACPI implementations. 708 */ 709 ObjDesc = SubObjectList[3]; 710 if (!ObjDesc || (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)) 711 { 712 SubObjectList[3] = SubObjectList[2]; 713 SubObjectList[2] = ObjDesc; 714 Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; 715 716 ACPI_WARN_PREDEFINED ((AE_INFO, 717 Info->FullPathname, Info->NodeFlags, 718 "PRT[%X]: Fixed reversed SourceName and SourceIndex", 719 Index)); 720 } 721 } 722 723 return (AE_OK); 724 } 725 726 727 /****************************************************************************** 728 * 729 * FUNCTION: AcpiNsRepair_PSS 730 * 731 * PARAMETERS: Info - Method execution information block 732 * ReturnObjectPtr - Pointer to the object returned from the 733 * evaluation of a method or object 734 * 735 * RETURN: Status. AE_OK if object is OK or was repaired successfully 736 * 737 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list 738 * by the CPU frequencies. Check that the power dissipation values 739 * are all proportional to CPU frequency (i.e., sorting by 740 * frequency should be the same as sorting by power.) 741 * 742 *****************************************************************************/ 743 744 static ACPI_STATUS 745 AcpiNsRepair_PSS ( 746 ACPI_EVALUATE_INFO *Info, 747 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 748 { 749 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 750 ACPI_OPERAND_OBJECT **OuterElements; 751 UINT32 OuterElementCount; 752 ACPI_OPERAND_OBJECT **Elements; 753 ACPI_OPERAND_OBJECT *ObjDesc; 754 UINT32 PreviousValue; 755 ACPI_STATUS Status; 756 UINT32 i; 757 758 759 /* 760 * Entries (subpackages) in the _PSS Package must be sorted by power 761 * dissipation, in descending order. If it appears that the list is 762 * incorrectly sorted, sort it. We sort by CpuFrequency, since this 763 * should be proportional to the power. 764 */ 765 Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 6, 0, 766 ACPI_SORT_DESCENDING, "CpuFrequency"); 767 if (ACPI_FAILURE (Status)) 768 { 769 return (Status); 770 } 771 772 /* 773 * We now know the list is correctly sorted by CPU frequency. Check if 774 * the power dissipation values are proportional. 775 */ 776 PreviousValue = ACPI_UINT32_MAX; 777 OuterElements = ReturnObject->Package.Elements; 778 OuterElementCount = ReturnObject->Package.Count; 779 780 for (i = 0; i < OuterElementCount; i++) 781 { 782 Elements = (*OuterElements)->Package.Elements; 783 ObjDesc = Elements[1]; /* Index1 = PowerDissipation */ 784 785 if ((UINT32) ObjDesc->Integer.Value > PreviousValue) 786 { 787 ACPI_WARN_PREDEFINED ((AE_INFO, 788 Info->FullPathname, Info->NodeFlags, 789 "SubPackage[%u,%u] - suspicious power dissipation values", 790 i-1, i)); 791 } 792 793 PreviousValue = (UINT32) ObjDesc->Integer.Value; 794 OuterElements++; 795 } 796 797 return (AE_OK); 798 } 799 800 801 /****************************************************************************** 802 * 803 * FUNCTION: AcpiNsRepair_TSS 804 * 805 * PARAMETERS: Info - Method execution information block 806 * ReturnObjectPtr - Pointer to the object returned from the 807 * evaluation of a method or object 808 * 809 * RETURN: Status. AE_OK if object is OK or was repaired successfully 810 * 811 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list 812 * descending by the power dissipation values. 813 * 814 *****************************************************************************/ 815 816 static ACPI_STATUS 817 AcpiNsRepair_TSS ( 818 ACPI_EVALUATE_INFO *Info, 819 ACPI_OPERAND_OBJECT **ReturnObjectPtr) 820 { 821 ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; 822 ACPI_STATUS Status; 823 ACPI_NAMESPACE_NODE *Node; 824 825 826 /* 827 * We can only sort the _TSS return package if there is no _PSS in the 828 * same scope. This is because if _PSS is present, the ACPI specification 829 * dictates that the _TSS Power Dissipation field is to be ignored, and 830 * therefore some BIOSs leave garbage values in the _TSS Power field(s). 831 * In this case, it is best to just return the _TSS package as-is. 832 * (May, 2011) 833 */ 834 Status = AcpiNsGetNode (Info->Node, "^_PSS", 835 ACPI_NS_NO_UPSEARCH, &Node); 836 if (ACPI_SUCCESS (Status)) 837 { 838 return (AE_OK); 839 } 840 841 Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 5, 1, 842 ACPI_SORT_DESCENDING, "PowerDissipation"); 843 844 return (Status); 845 } 846 847 848 /****************************************************************************** 849 * 850 * FUNCTION: AcpiNsCheckSortedList 851 * 852 * PARAMETERS: Info - Method execution information block 853 * ReturnObject - Pointer to the top-level returned object 854 * StartIndex - Index of the first subpackage 855 * ExpectedCount - Minimum length of each subpackage 856 * SortIndex - Subpackage entry to sort on 857 * SortDirection - Ascending or descending 858 * SortKeyName - Name of the SortIndex field 859 * 860 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or 861 * has been repaired by sorting the list. 862 * 863 * DESCRIPTION: Check if the package list is valid and sorted correctly by the 864 * SortIndex. If not, then sort the list. 865 * 866 *****************************************************************************/ 867 868 static ACPI_STATUS 869 AcpiNsCheckSortedList ( 870 ACPI_EVALUATE_INFO *Info, 871 ACPI_OPERAND_OBJECT *ReturnObject, 872 UINT32 StartIndex, 873 UINT32 ExpectedCount, 874 UINT32 SortIndex, 875 UINT8 SortDirection, 876 const char *SortKeyName) 877 { 878 UINT32 OuterElementCount; 879 ACPI_OPERAND_OBJECT **OuterElements; 880 ACPI_OPERAND_OBJECT **Elements; 881 ACPI_OPERAND_OBJECT *ObjDesc; 882 UINT32 i; 883 UINT32 PreviousValue; 884 885 886 ACPI_FUNCTION_NAME (NsCheckSortedList); 887 888 889 /* The top-level object must be a package */ 890 891 if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE) 892 { 893 return (AE_AML_OPERAND_TYPE); 894 } 895 896 /* 897 * NOTE: assumes list of subpackages contains no NULL elements. 898 * Any NULL elements should have been removed by earlier call 899 * to AcpiNsRemoveNullElements. 900 */ 901 OuterElementCount = ReturnObject->Package.Count; 902 if (!OuterElementCount || StartIndex >= OuterElementCount) 903 { 904 return (AE_AML_PACKAGE_LIMIT); 905 } 906 907 OuterElements = &ReturnObject->Package.Elements[StartIndex]; 908 OuterElementCount -= StartIndex; 909 910 PreviousValue = 0; 911 if (SortDirection == ACPI_SORT_DESCENDING) 912 { 913 PreviousValue = ACPI_UINT32_MAX; 914 } 915 916 /* Examine each subpackage */ 917 918 for (i = 0; i < OuterElementCount; i++) 919 { 920 /* Each element of the top-level package must also be a package */ 921 922 if ((*OuterElements)->Common.Type != ACPI_TYPE_PACKAGE) 923 { 924 return (AE_AML_OPERAND_TYPE); 925 } 926 927 /* Each subpackage must have the minimum length */ 928 929 if ((*OuterElements)->Package.Count < ExpectedCount) 930 { 931 return (AE_AML_PACKAGE_LIMIT); 932 } 933 934 Elements = (*OuterElements)->Package.Elements; 935 ObjDesc = Elements[SortIndex]; 936 937 if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER) 938 { 939 return (AE_AML_OPERAND_TYPE); 940 } 941 942 /* 943 * The list must be sorted in the specified order. If we detect a 944 * discrepancy, sort the entire list. 945 */ 946 if (((SortDirection == ACPI_SORT_ASCENDING) && 947 (ObjDesc->Integer.Value < PreviousValue)) || 948 ((SortDirection == ACPI_SORT_DESCENDING) && 949 (ObjDesc->Integer.Value > PreviousValue))) 950 { 951 AcpiNsSortList (&ReturnObject->Package.Elements[StartIndex], 952 OuterElementCount, SortIndex, SortDirection); 953 954 Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; 955 956 ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, 957 "%s: Repaired unsorted list - now sorted by %s\n", 958 Info->FullPathname, SortKeyName)); 959 return (AE_OK); 960 } 961 962 PreviousValue = (UINT32) ObjDesc->Integer.Value; 963 OuterElements++; 964 } 965 966 return (AE_OK); 967 } 968 969 970 /****************************************************************************** 971 * 972 * FUNCTION: AcpiNsSortList 973 * 974 * PARAMETERS: Elements - Package object element list 975 * Count - Element count for above 976 * Index - Sort by which package element 977 * SortDirection - Ascending or Descending sort 978 * 979 * RETURN: None 980 * 981 * DESCRIPTION: Sort the objects that are in a package element list. 982 * 983 * NOTE: Assumes that all NULL elements have been removed from the package, 984 * and that all elements have been verified to be of type Integer. 985 * 986 *****************************************************************************/ 987 988 static void 989 AcpiNsSortList ( 990 ACPI_OPERAND_OBJECT **Elements, 991 UINT32 Count, 992 UINT32 Index, 993 UINT8 SortDirection) 994 { 995 ACPI_OPERAND_OBJECT *ObjDesc1; 996 ACPI_OPERAND_OBJECT *ObjDesc2; 997 ACPI_OPERAND_OBJECT *TempObj; 998 UINT32 i; 999 UINT32 j; 1000 1001 1002 /* Simple bubble sort */ 1003 1004 for (i = 1; i < Count; i++) 1005 { 1006 for (j = (Count - 1); j >= i; j--) 1007 { 1008 ObjDesc1 = Elements[j-1]->Package.Elements[Index]; 1009 ObjDesc2 = Elements[j]->Package.Elements[Index]; 1010 1011 if (((SortDirection == ACPI_SORT_ASCENDING) && 1012 (ObjDesc1->Integer.Value > ObjDesc2->Integer.Value)) || 1013 1014 ((SortDirection == ACPI_SORT_DESCENDING) && 1015 (ObjDesc1->Integer.Value < ObjDesc2->Integer.Value))) 1016 { 1017 TempObj = Elements[j-1]; 1018 Elements[j-1] = Elements[j]; 1019 Elements[j] = TempObj; 1020 } 1021 } 1022 } 1023 } 1024 1025 1026 /****************************************************************************** 1027 * 1028 * FUNCTION: AcpiNsRemoveElement 1029 * 1030 * PARAMETERS: ObjDesc - Package object element list 1031 * Index - Index of element to remove 1032 * 1033 * RETURN: None 1034 * 1035 * DESCRIPTION: Remove the requested element of a package and delete it. 1036 * 1037 *****************************************************************************/ 1038 1039 static void 1040 AcpiNsRemoveElement ( 1041 ACPI_OPERAND_OBJECT *ObjDesc, 1042 UINT32 Index) 1043 { 1044 ACPI_OPERAND_OBJECT **Source; 1045 ACPI_OPERAND_OBJECT **Dest; 1046 UINT32 Count; 1047 UINT32 NewCount; 1048 UINT32 i; 1049 1050 1051 ACPI_FUNCTION_NAME (NsRemoveElement); 1052 1053 1054 Count = ObjDesc->Package.Count; 1055 NewCount = Count - 1; 1056 1057 Source = ObjDesc->Package.Elements; 1058 Dest = Source; 1059 1060 /* Examine all elements of the package object, remove matched index */ 1061 1062 for (i = 0; i < Count; i++) 1063 { 1064 if (i == Index) 1065 { 1066 AcpiUtRemoveReference (*Source); /* Remove one ref for being in pkg */ 1067 AcpiUtRemoveReference (*Source); 1068 } 1069 else 1070 { 1071 *Dest = *Source; 1072 Dest++; 1073 } 1074 1075 Source++; 1076 } 1077 1078 /* NULL terminate list and update the package count */ 1079 1080 *Dest = NULL; 1081 ObjDesc->Package.Count = NewCount; 1082 } 1083