1 /****************************************************************************** 2 * 3 * Module Name: nsrepair2 - Repair for objects returned by specific 4 * predefined methods 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2016, 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 MERCHANTIBILITY 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/acpi.h> 46 #include "accommon.h" 47 #include "acnamesp.h" 48 49 #define _COMPONENT ACPI_NAMESPACE 50 ACPI_MODULE_NAME("nsrepair2") 51 52 /* 53 * Information structure and handler for ACPI predefined names that can 54 * be repaired on a per-name basis. 55 */ 56 typedef 57 acpi_status (*acpi_repair_function) (struct acpi_evaluate_info * info, 58 union acpi_operand_object ** 59 return_object_ptr); 60 61 typedef struct acpi_repair_info { 62 char name[ACPI_NAME_SIZE]; 63 acpi_repair_function repair_function; 64 65 } acpi_repair_info; 66 67 /* Local prototypes */ 68 69 static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct 70 acpi_namespace_node 71 *node); 72 73 static acpi_status 74 acpi_ns_repair_ALR(struct acpi_evaluate_info *info, 75 union acpi_operand_object **return_object_ptr); 76 77 static acpi_status 78 acpi_ns_repair_CID(struct acpi_evaluate_info *info, 79 union acpi_operand_object **return_object_ptr); 80 81 static acpi_status 82 acpi_ns_repair_CST(struct acpi_evaluate_info *info, 83 union acpi_operand_object **return_object_ptr); 84 85 static acpi_status 86 acpi_ns_repair_FDE(struct acpi_evaluate_info *info, 87 union acpi_operand_object **return_object_ptr); 88 89 static acpi_status 90 acpi_ns_repair_HID(struct acpi_evaluate_info *info, 91 union acpi_operand_object **return_object_ptr); 92 93 static acpi_status 94 acpi_ns_repair_PRT(struct acpi_evaluate_info *info, 95 union acpi_operand_object **return_object_ptr); 96 97 static acpi_status 98 acpi_ns_repair_PSS(struct acpi_evaluate_info *info, 99 union acpi_operand_object **return_object_ptr); 100 101 static acpi_status 102 acpi_ns_repair_TSS(struct acpi_evaluate_info *info, 103 union acpi_operand_object **return_object_ptr); 104 105 static acpi_status 106 acpi_ns_check_sorted_list(struct acpi_evaluate_info *info, 107 union acpi_operand_object *return_object, 108 u32 start_index, 109 u32 expected_count, 110 u32 sort_index, 111 u8 sort_direction, char *sort_key_name); 112 113 /* Values for sort_direction above */ 114 115 #define ACPI_SORT_ASCENDING 0 116 #define ACPI_SORT_DESCENDING 1 117 118 static void 119 acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index); 120 121 static void 122 acpi_ns_sort_list(union acpi_operand_object **elements, 123 u32 count, u32 index, u8 sort_direction); 124 125 /* 126 * This table contains the names of the predefined methods for which we can 127 * perform more complex repairs. 128 * 129 * As necessary: 130 * 131 * _ALR: Sort the list ascending by ambient_illuminance 132 * _CID: Strings: uppercase all, remove any leading asterisk 133 * _CST: Sort the list ascending by C state type 134 * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs 135 * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs 136 * _HID: Strings: uppercase all, remove any leading asterisk 137 * _PRT: Fix reversed source_name and source_index 138 * _PSS: Sort the list descending by Power 139 * _TSS: Sort the list descending by Power 140 * 141 * Names that must be packages, but cannot be sorted: 142 * 143 * _BCL: Values are tied to the Package index where they appear, and cannot 144 * be moved or sorted. These index values are used for _BQC and _BCM. 145 * However, we can fix the case where a buffer is returned, by converting 146 * it to a Package of integers. 147 */ 148 static const struct acpi_repair_info acpi_ns_repairable_names[] = { 149 {"_ALR", acpi_ns_repair_ALR}, 150 {"_CID", acpi_ns_repair_CID}, 151 {"_CST", acpi_ns_repair_CST}, 152 {"_FDE", acpi_ns_repair_FDE}, 153 {"_GTM", acpi_ns_repair_FDE}, /* _GTM has same repair as _FDE */ 154 {"_HID", acpi_ns_repair_HID}, 155 {"_PRT", acpi_ns_repair_PRT}, 156 {"_PSS", acpi_ns_repair_PSS}, 157 {"_TSS", acpi_ns_repair_TSS}, 158 {{0, 0, 0, 0}, NULL} /* Table terminator */ 159 }; 160 161 #define ACPI_FDE_FIELD_COUNT 5 162 #define ACPI_FDE_BYTE_BUFFER_SIZE 5 163 #define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * sizeof (u32)) 164 165 /****************************************************************************** 166 * 167 * FUNCTION: acpi_ns_complex_repairs 168 * 169 * PARAMETERS: info - Method execution information block 170 * node - Namespace node for the method/object 171 * validate_status - Original status of earlier validation 172 * return_object_ptr - Pointer to the object returned from the 173 * evaluation of a method or object 174 * 175 * RETURN: Status. AE_OK if repair was successful. If name is not 176 * matched, validate_status is returned. 177 * 178 * DESCRIPTION: Attempt to repair/convert a return object of a type that was 179 * not expected. 180 * 181 *****************************************************************************/ 182 183 acpi_status 184 acpi_ns_complex_repairs(struct acpi_evaluate_info *info, 185 struct acpi_namespace_node *node, 186 acpi_status validate_status, 187 union acpi_operand_object **return_object_ptr) 188 { 189 const struct acpi_repair_info *predefined; 190 acpi_status status; 191 192 /* Check if this name is in the list of repairable names */ 193 194 predefined = acpi_ns_match_complex_repair(node); 195 if (!predefined) { 196 return (validate_status); 197 } 198 199 status = predefined->repair_function(info, return_object_ptr); 200 return (status); 201 } 202 203 /****************************************************************************** 204 * 205 * FUNCTION: acpi_ns_match_complex_repair 206 * 207 * PARAMETERS: node - Namespace node for the method/object 208 * 209 * RETURN: Pointer to entry in repair table. NULL indicates not found. 210 * 211 * DESCRIPTION: Check an object name against the repairable object list. 212 * 213 *****************************************************************************/ 214 215 static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct 216 acpi_namespace_node 217 *node) 218 { 219 const struct acpi_repair_info *this_name; 220 221 /* Search info table for a repairable predefined method/object name */ 222 223 this_name = acpi_ns_repairable_names; 224 while (this_name->repair_function) { 225 if (ACPI_COMPARE_NAME(node->name.ascii, this_name->name)) { 226 return (this_name); 227 } 228 229 this_name++; 230 } 231 232 return (NULL); /* Not found */ 233 } 234 235 /****************************************************************************** 236 * 237 * FUNCTION: acpi_ns_repair_ALR 238 * 239 * PARAMETERS: info - Method execution information block 240 * return_object_ptr - Pointer to the object returned from the 241 * evaluation of a method or object 242 * 243 * RETURN: Status. AE_OK if object is OK or was repaired successfully 244 * 245 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list 246 * ascending by the ambient illuminance values. 247 * 248 *****************************************************************************/ 249 250 static acpi_status 251 acpi_ns_repair_ALR(struct acpi_evaluate_info *info, 252 union acpi_operand_object **return_object_ptr) 253 { 254 union acpi_operand_object *return_object = *return_object_ptr; 255 acpi_status status; 256 257 status = acpi_ns_check_sorted_list(info, return_object, 0, 2, 1, 258 ACPI_SORT_ASCENDING, 259 "AmbientIlluminance"); 260 261 return (status); 262 } 263 264 /****************************************************************************** 265 * 266 * FUNCTION: acpi_ns_repair_FDE 267 * 268 * PARAMETERS: info - Method execution information block 269 * return_object_ptr - Pointer to the object returned from the 270 * evaluation of a method or object 271 * 272 * RETURN: Status. AE_OK if object is OK or was repaired successfully 273 * 274 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return 275 * value is a Buffer of 5 DWORDs. This function repairs a common 276 * problem where the return value is a Buffer of BYTEs, not 277 * DWORDs. 278 * 279 *****************************************************************************/ 280 281 static acpi_status 282 acpi_ns_repair_FDE(struct acpi_evaluate_info *info, 283 union acpi_operand_object **return_object_ptr) 284 { 285 union acpi_operand_object *return_object = *return_object_ptr; 286 union acpi_operand_object *buffer_object; 287 u8 *byte_buffer; 288 u32 *dword_buffer; 289 u32 i; 290 291 ACPI_FUNCTION_NAME(ns_repair_FDE); 292 293 switch (return_object->common.type) { 294 case ACPI_TYPE_BUFFER: 295 296 /* This is the expected type. Length should be (at least) 5 DWORDs */ 297 298 if (return_object->buffer.length >= ACPI_FDE_DWORD_BUFFER_SIZE) { 299 return (AE_OK); 300 } 301 302 /* We can only repair if we have exactly 5 BYTEs */ 303 304 if (return_object->buffer.length != ACPI_FDE_BYTE_BUFFER_SIZE) { 305 ACPI_WARN_PREDEFINED((AE_INFO, 306 info->full_pathname, 307 info->node_flags, 308 "Incorrect return buffer length %u, expected %u", 309 return_object->buffer.length, 310 ACPI_FDE_DWORD_BUFFER_SIZE)); 311 312 return (AE_AML_OPERAND_TYPE); 313 } 314 315 /* Create the new (larger) buffer object */ 316 317 buffer_object = 318 acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE); 319 if (!buffer_object) { 320 return (AE_NO_MEMORY); 321 } 322 323 /* Expand each byte to a DWORD */ 324 325 byte_buffer = return_object->buffer.pointer; 326 dword_buffer = ACPI_CAST_PTR(u32, 327 buffer_object->buffer.pointer); 328 329 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) { 330 *dword_buffer = (u32) *byte_buffer; 331 dword_buffer++; 332 byte_buffer++; 333 } 334 335 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 336 "%s Expanded Byte Buffer to expected DWord Buffer\n", 337 info->full_pathname)); 338 break; 339 340 default: 341 342 return (AE_AML_OPERAND_TYPE); 343 } 344 345 /* Delete the original return object, return the new buffer object */ 346 347 acpi_ut_remove_reference(return_object); 348 *return_object_ptr = buffer_object; 349 350 info->return_flags |= ACPI_OBJECT_REPAIRED; 351 return (AE_OK); 352 } 353 354 /****************************************************************************** 355 * 356 * FUNCTION: acpi_ns_repair_CID 357 * 358 * PARAMETERS: info - Method execution information block 359 * return_object_ptr - Pointer to the object returned from the 360 * evaluation of a method or object 361 * 362 * RETURN: Status. AE_OK if object is OK or was repaired successfully 363 * 364 * DESCRIPTION: Repair for the _CID object. If a string, ensure that all 365 * letters are uppercase and that there is no leading asterisk. 366 * If a Package, ensure same for all string elements. 367 * 368 *****************************************************************************/ 369 370 static acpi_status 371 acpi_ns_repair_CID(struct acpi_evaluate_info *info, 372 union acpi_operand_object **return_object_ptr) 373 { 374 acpi_status status; 375 union acpi_operand_object *return_object = *return_object_ptr; 376 union acpi_operand_object **element_ptr; 377 union acpi_operand_object *original_element; 378 u16 original_ref_count; 379 u32 i; 380 381 /* Check for _CID as a simple string */ 382 383 if (return_object->common.type == ACPI_TYPE_STRING) { 384 status = acpi_ns_repair_HID(info, return_object_ptr); 385 return (status); 386 } 387 388 /* Exit if not a Package */ 389 390 if (return_object->common.type != ACPI_TYPE_PACKAGE) { 391 return (AE_OK); 392 } 393 394 /* Examine each element of the _CID package */ 395 396 element_ptr = return_object->package.elements; 397 for (i = 0; i < return_object->package.count; i++) { 398 original_element = *element_ptr; 399 original_ref_count = original_element->common.reference_count; 400 401 status = acpi_ns_repair_HID(info, element_ptr); 402 if (ACPI_FAILURE(status)) { 403 return (status); 404 } 405 406 /* Take care with reference counts */ 407 408 if (original_element != *element_ptr) { 409 410 /* Element was replaced */ 411 412 (*element_ptr)->common.reference_count = 413 original_ref_count; 414 415 acpi_ut_remove_reference(original_element); 416 } 417 418 element_ptr++; 419 } 420 421 return (AE_OK); 422 } 423 424 /****************************************************************************** 425 * 426 * FUNCTION: acpi_ns_repair_CST 427 * 428 * PARAMETERS: info - Method execution information block 429 * return_object_ptr - Pointer to the object returned from the 430 * evaluation of a method or object 431 * 432 * RETURN: Status. AE_OK if object is OK or was repaired successfully 433 * 434 * DESCRIPTION: Repair for the _CST object: 435 * 1. Sort the list ascending by C state type 436 * 2. Ensure type cannot be zero 437 * 3. A subpackage count of zero means _CST is meaningless 438 * 4. Count must match the number of C state subpackages 439 * 440 *****************************************************************************/ 441 442 static acpi_status 443 acpi_ns_repair_CST(struct acpi_evaluate_info *info, 444 union acpi_operand_object **return_object_ptr) 445 { 446 union acpi_operand_object *return_object = *return_object_ptr; 447 union acpi_operand_object **outer_elements; 448 u32 outer_element_count; 449 union acpi_operand_object *obj_desc; 450 acpi_status status; 451 u8 removing; 452 u32 i; 453 454 ACPI_FUNCTION_NAME(ns_repair_CST); 455 456 /* 457 * Check if the C-state type values are proportional. 458 */ 459 outer_element_count = return_object->package.count - 1; 460 i = 0; 461 while (i < outer_element_count) { 462 outer_elements = &return_object->package.elements[i + 1]; 463 removing = FALSE; 464 465 if ((*outer_elements)->package.count == 0) { 466 ACPI_WARN_PREDEFINED((AE_INFO, 467 info->full_pathname, 468 info->node_flags, 469 "SubPackage[%u] - removing entry due to zero count", 470 i)); 471 removing = TRUE; 472 goto remove_element; 473 } 474 475 obj_desc = (*outer_elements)->package.elements[1]; /* Index1 = Type */ 476 if ((u32)obj_desc->integer.value == 0) { 477 ACPI_WARN_PREDEFINED((AE_INFO, 478 info->full_pathname, 479 info->node_flags, 480 "SubPackage[%u] - removing entry due to invalid Type(0)", 481 i)); 482 removing = TRUE; 483 } 484 485 remove_element: 486 if (removing) { 487 acpi_ns_remove_element(return_object, i + 1); 488 outer_element_count--; 489 } else { 490 i++; 491 } 492 } 493 494 /* Update top-level package count, Type "Integer" checked elsewhere */ 495 496 obj_desc = return_object->package.elements[0]; 497 obj_desc->integer.value = outer_element_count; 498 499 /* 500 * Entries (subpackages) in the _CST Package must be sorted by the 501 * C-state type, in ascending order. 502 */ 503 status = acpi_ns_check_sorted_list(info, return_object, 1, 4, 1, 504 ACPI_SORT_ASCENDING, "C-State Type"); 505 if (ACPI_FAILURE(status)) { 506 return (status); 507 } 508 509 return (AE_OK); 510 } 511 512 /****************************************************************************** 513 * 514 * FUNCTION: acpi_ns_repair_HID 515 * 516 * PARAMETERS: info - Method execution information block 517 * return_object_ptr - Pointer to the object returned from the 518 * evaluation of a method or object 519 * 520 * RETURN: Status. AE_OK if object is OK or was repaired successfully 521 * 522 * DESCRIPTION: Repair for the _HID object. If a string, ensure that all 523 * letters are uppercase and that there is no leading asterisk. 524 * 525 *****************************************************************************/ 526 527 static acpi_status 528 acpi_ns_repair_HID(struct acpi_evaluate_info *info, 529 union acpi_operand_object **return_object_ptr) 530 { 531 union acpi_operand_object *return_object = *return_object_ptr; 532 union acpi_operand_object *new_string; 533 char *source; 534 char *dest; 535 536 ACPI_FUNCTION_NAME(ns_repair_HID); 537 538 /* We only care about string _HID objects (not integers) */ 539 540 if (return_object->common.type != ACPI_TYPE_STRING) { 541 return (AE_OK); 542 } 543 544 if (return_object->string.length == 0) { 545 ACPI_WARN_PREDEFINED((AE_INFO, 546 info->full_pathname, info->node_flags, 547 "Invalid zero-length _HID or _CID string")); 548 549 /* Return AE_OK anyway, let driver handle it */ 550 551 info->return_flags |= ACPI_OBJECT_REPAIRED; 552 return (AE_OK); 553 } 554 555 /* It is simplest to always create a new string object */ 556 557 new_string = acpi_ut_create_string_object(return_object->string.length); 558 if (!new_string) { 559 return (AE_NO_MEMORY); 560 } 561 562 /* 563 * Remove a leading asterisk if present. For some unknown reason, there 564 * are many machines in the field that contains IDs like this. 565 * 566 * Examples: "*PNP0C03", "*ACPI0003" 567 */ 568 source = return_object->string.pointer; 569 if (*source == '*') { 570 source++; 571 new_string->string.length--; 572 573 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 574 "%s: Removed invalid leading asterisk\n", 575 info->full_pathname)); 576 } 577 578 /* 579 * Copy and uppercase the string. From the ACPI 5.0 specification: 580 * 581 * A valid PNP ID must be of the form "AAA####" where A is an uppercase 582 * letter and # is a hex digit. A valid ACPI ID must be of the form 583 * "NNNN####" where N is an uppercase letter or decimal digit, and 584 * # is a hex digit. 585 */ 586 for (dest = new_string->string.pointer; *source; dest++, source++) { 587 *dest = (char)toupper((int)*source); 588 } 589 590 acpi_ut_remove_reference(return_object); 591 *return_object_ptr = new_string; 592 return (AE_OK); 593 } 594 595 /****************************************************************************** 596 * 597 * FUNCTION: acpi_ns_repair_PRT 598 * 599 * PARAMETERS: info - Method execution information block 600 * return_object_ptr - Pointer to the object returned from the 601 * evaluation of a method or object 602 * 603 * RETURN: Status. AE_OK if object is OK or was repaired successfully 604 * 605 * DESCRIPTION: Repair for the _PRT object. If necessary, fix reversed 606 * source_name and source_index field, a common BIOS bug. 607 * 608 *****************************************************************************/ 609 610 static acpi_status 611 acpi_ns_repair_PRT(struct acpi_evaluate_info *info, 612 union acpi_operand_object **return_object_ptr) 613 { 614 union acpi_operand_object *package_object = *return_object_ptr; 615 union acpi_operand_object **top_object_list; 616 union acpi_operand_object **sub_object_list; 617 union acpi_operand_object *obj_desc; 618 union acpi_operand_object *sub_package; 619 u32 element_count; 620 u32 index; 621 622 /* Each element in the _PRT package is a subpackage */ 623 624 top_object_list = package_object->package.elements; 625 element_count = package_object->package.count; 626 627 /* Examine each subpackage */ 628 629 for (index = 0; index < element_count; index++, top_object_list++) { 630 sub_package = *top_object_list; 631 sub_object_list = sub_package->package.elements; 632 633 /* Check for minimum required element count */ 634 635 if (sub_package->package.count < 4) { 636 continue; 637 } 638 639 /* 640 * If the BIOS has erroneously reversed the _PRT source_name (index 2) 641 * and the source_index (index 3), fix it. _PRT is important enough to 642 * workaround this BIOS error. This also provides compatibility with 643 * other ACPI implementations. 644 */ 645 obj_desc = sub_object_list[3]; 646 if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) { 647 sub_object_list[3] = sub_object_list[2]; 648 sub_object_list[2] = obj_desc; 649 info->return_flags |= ACPI_OBJECT_REPAIRED; 650 651 ACPI_WARN_PREDEFINED((AE_INFO, 652 info->full_pathname, 653 info->node_flags, 654 "PRT[%X]: Fixed reversed SourceName and SourceIndex", 655 index)); 656 } 657 } 658 659 return (AE_OK); 660 } 661 662 /****************************************************************************** 663 * 664 * FUNCTION: acpi_ns_repair_PSS 665 * 666 * PARAMETERS: info - Method execution information block 667 * return_object_ptr - Pointer to the object returned from the 668 * evaluation of a method or object 669 * 670 * RETURN: Status. AE_OK if object is OK or was repaired successfully 671 * 672 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list 673 * by the CPU frequencies. Check that the power dissipation values 674 * are all proportional to CPU frequency (i.e., sorting by 675 * frequency should be the same as sorting by power.) 676 * 677 *****************************************************************************/ 678 679 static acpi_status 680 acpi_ns_repair_PSS(struct acpi_evaluate_info *info, 681 union acpi_operand_object **return_object_ptr) 682 { 683 union acpi_operand_object *return_object = *return_object_ptr; 684 union acpi_operand_object **outer_elements; 685 u32 outer_element_count; 686 union acpi_operand_object **elements; 687 union acpi_operand_object *obj_desc; 688 u32 previous_value; 689 acpi_status status; 690 u32 i; 691 692 /* 693 * Entries (subpackages) in the _PSS Package must be sorted by power 694 * dissipation, in descending order. If it appears that the list is 695 * incorrectly sorted, sort it. We sort by cpu_frequency, since this 696 * should be proportional to the power. 697 */ 698 status = acpi_ns_check_sorted_list(info, return_object, 0, 6, 0, 699 ACPI_SORT_DESCENDING, 700 "CpuFrequency"); 701 if (ACPI_FAILURE(status)) { 702 return (status); 703 } 704 705 /* 706 * We now know the list is correctly sorted by CPU frequency. Check if 707 * the power dissipation values are proportional. 708 */ 709 previous_value = ACPI_UINT32_MAX; 710 outer_elements = return_object->package.elements; 711 outer_element_count = return_object->package.count; 712 713 for (i = 0; i < outer_element_count; i++) { 714 elements = (*outer_elements)->package.elements; 715 obj_desc = elements[1]; /* Index1 = power_dissipation */ 716 717 if ((u32)obj_desc->integer.value > previous_value) { 718 ACPI_WARN_PREDEFINED((AE_INFO, 719 info->full_pathname, 720 info->node_flags, 721 "SubPackage[%u,%u] - suspicious power dissipation values", 722 i - 1, i)); 723 } 724 725 previous_value = (u32) obj_desc->integer.value; 726 outer_elements++; 727 } 728 729 return (AE_OK); 730 } 731 732 /****************************************************************************** 733 * 734 * FUNCTION: acpi_ns_repair_TSS 735 * 736 * PARAMETERS: info - Method execution information block 737 * return_object_ptr - Pointer to the object returned from the 738 * evaluation of a method or object 739 * 740 * RETURN: Status. AE_OK if object is OK or was repaired successfully 741 * 742 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list 743 * descending by the power dissipation values. 744 * 745 *****************************************************************************/ 746 747 static acpi_status 748 acpi_ns_repair_TSS(struct acpi_evaluate_info *info, 749 union acpi_operand_object **return_object_ptr) 750 { 751 union acpi_operand_object *return_object = *return_object_ptr; 752 acpi_status status; 753 struct acpi_namespace_node *node; 754 755 /* 756 * We can only sort the _TSS return package if there is no _PSS in the 757 * same scope. This is because if _PSS is present, the ACPI specification 758 * dictates that the _TSS Power Dissipation field is to be ignored, and 759 * therefore some BIOSs leave garbage values in the _TSS Power field(s). 760 * In this case, it is best to just return the _TSS package as-is. 761 * (May, 2011) 762 */ 763 status = acpi_ns_get_node(info->node, "^_PSS", 764 ACPI_NS_NO_UPSEARCH, &node); 765 if (ACPI_SUCCESS(status)) { 766 return (AE_OK); 767 } 768 769 status = acpi_ns_check_sorted_list(info, return_object, 0, 5, 1, 770 ACPI_SORT_DESCENDING, 771 "PowerDissipation"); 772 773 return (status); 774 } 775 776 /****************************************************************************** 777 * 778 * FUNCTION: acpi_ns_check_sorted_list 779 * 780 * PARAMETERS: info - Method execution information block 781 * return_object - Pointer to the top-level returned object 782 * start_index - Index of the first subpackage 783 * expected_count - Minimum length of each subpackage 784 * sort_index - Subpackage entry to sort on 785 * sort_direction - Ascending or descending 786 * sort_key_name - Name of the sort_index field 787 * 788 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or 789 * has been repaired by sorting the list. 790 * 791 * DESCRIPTION: Check if the package list is valid and sorted correctly by the 792 * sort_index. If not, then sort the list. 793 * 794 *****************************************************************************/ 795 796 static acpi_status 797 acpi_ns_check_sorted_list(struct acpi_evaluate_info *info, 798 union acpi_operand_object *return_object, 799 u32 start_index, 800 u32 expected_count, 801 u32 sort_index, 802 u8 sort_direction, char *sort_key_name) 803 { 804 u32 outer_element_count; 805 union acpi_operand_object **outer_elements; 806 union acpi_operand_object **elements; 807 union acpi_operand_object *obj_desc; 808 u32 i; 809 u32 previous_value; 810 811 ACPI_FUNCTION_NAME(ns_check_sorted_list); 812 813 /* The top-level object must be a package */ 814 815 if (return_object->common.type != ACPI_TYPE_PACKAGE) { 816 return (AE_AML_OPERAND_TYPE); 817 } 818 819 /* 820 * NOTE: assumes list of subpackages contains no NULL elements. 821 * Any NULL elements should have been removed by earlier call 822 * to acpi_ns_remove_null_elements. 823 */ 824 outer_element_count = return_object->package.count; 825 if (!outer_element_count || start_index >= outer_element_count) { 826 return (AE_AML_PACKAGE_LIMIT); 827 } 828 829 outer_elements = &return_object->package.elements[start_index]; 830 outer_element_count -= start_index; 831 832 previous_value = 0; 833 if (sort_direction == ACPI_SORT_DESCENDING) { 834 previous_value = ACPI_UINT32_MAX; 835 } 836 837 /* Examine each subpackage */ 838 839 for (i = 0; i < outer_element_count; i++) { 840 841 /* Each element of the top-level package must also be a package */ 842 843 if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) { 844 return (AE_AML_OPERAND_TYPE); 845 } 846 847 /* Each subpackage must have the minimum length */ 848 849 if ((*outer_elements)->package.count < expected_count) { 850 return (AE_AML_PACKAGE_LIMIT); 851 } 852 853 elements = (*outer_elements)->package.elements; 854 obj_desc = elements[sort_index]; 855 856 if (obj_desc->common.type != ACPI_TYPE_INTEGER) { 857 return (AE_AML_OPERAND_TYPE); 858 } 859 860 /* 861 * The list must be sorted in the specified order. If we detect a 862 * discrepancy, sort the entire list. 863 */ 864 if (((sort_direction == ACPI_SORT_ASCENDING) && 865 (obj_desc->integer.value < previous_value)) || 866 ((sort_direction == ACPI_SORT_DESCENDING) && 867 (obj_desc->integer.value > previous_value))) { 868 acpi_ns_sort_list(&return_object->package. 869 elements[start_index], 870 outer_element_count, sort_index, 871 sort_direction); 872 873 info->return_flags |= ACPI_OBJECT_REPAIRED; 874 875 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 876 "%s: Repaired unsorted list - now sorted by %s\n", 877 info->full_pathname, sort_key_name)); 878 return (AE_OK); 879 } 880 881 previous_value = (u32) obj_desc->integer.value; 882 outer_elements++; 883 } 884 885 return (AE_OK); 886 } 887 888 /****************************************************************************** 889 * 890 * FUNCTION: acpi_ns_sort_list 891 * 892 * PARAMETERS: elements - Package object element list 893 * count - Element count for above 894 * index - Sort by which package element 895 * sort_direction - Ascending or Descending sort 896 * 897 * RETURN: None 898 * 899 * DESCRIPTION: Sort the objects that are in a package element list. 900 * 901 * NOTE: Assumes that all NULL elements have been removed from the package, 902 * and that all elements have been verified to be of type Integer. 903 * 904 *****************************************************************************/ 905 906 static void 907 acpi_ns_sort_list(union acpi_operand_object **elements, 908 u32 count, u32 index, u8 sort_direction) 909 { 910 union acpi_operand_object *obj_desc1; 911 union acpi_operand_object *obj_desc2; 912 union acpi_operand_object *temp_obj; 913 u32 i; 914 u32 j; 915 916 /* Simple bubble sort */ 917 918 for (i = 1; i < count; i++) { 919 for (j = (count - 1); j >= i; j--) { 920 obj_desc1 = elements[j - 1]->package.elements[index]; 921 obj_desc2 = elements[j]->package.elements[index]; 922 923 if (((sort_direction == ACPI_SORT_ASCENDING) && 924 (obj_desc1->integer.value > 925 obj_desc2->integer.value)) 926 || ((sort_direction == ACPI_SORT_DESCENDING) 927 && (obj_desc1->integer.value < 928 obj_desc2->integer.value))) { 929 temp_obj = elements[j - 1]; 930 elements[j - 1] = elements[j]; 931 elements[j] = temp_obj; 932 } 933 } 934 } 935 } 936 937 /****************************************************************************** 938 * 939 * FUNCTION: acpi_ns_remove_element 940 * 941 * PARAMETERS: obj_desc - Package object element list 942 * index - Index of element to remove 943 * 944 * RETURN: None 945 * 946 * DESCRIPTION: Remove the requested element of a package and delete it. 947 * 948 *****************************************************************************/ 949 950 static void 951 acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index) 952 { 953 union acpi_operand_object **source; 954 union acpi_operand_object **dest; 955 u32 count; 956 u32 new_count; 957 u32 i; 958 959 ACPI_FUNCTION_NAME(ns_remove_element); 960 961 count = obj_desc->package.count; 962 new_count = count - 1; 963 964 source = obj_desc->package.elements; 965 dest = source; 966 967 /* Examine all elements of the package object, remove matched index */ 968 969 for (i = 0; i < count; i++) { 970 if (i == index) { 971 acpi_ut_remove_reference(*source); /* Remove one ref for being in pkg */ 972 acpi_ut_remove_reference(*source); 973 } else { 974 *dest = *source; 975 dest++; 976 } 977 978 source++; 979 } 980 981 /* NULL terminate list and update the package count */ 982 983 *dest = NULL; 984 obj_desc->package.count = new_count; 985 } 986