1 /****************************************************************************** 2 * 3 * Module Name: nsrepair2 - Repair for objects returned by specific 4 * predefined methods 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2015, 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 this_name++; 229 } 230 231 return (NULL); /* Not found */ 232 } 233 234 /****************************************************************************** 235 * 236 * FUNCTION: acpi_ns_repair_ALR 237 * 238 * PARAMETERS: info - Method execution information block 239 * return_object_ptr - Pointer to the object returned from the 240 * evaluation of a method or object 241 * 242 * RETURN: Status. AE_OK if object is OK or was repaired successfully 243 * 244 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list 245 * ascending by the ambient illuminance values. 246 * 247 *****************************************************************************/ 248 249 static acpi_status 250 acpi_ns_repair_ALR(struct acpi_evaluate_info *info, 251 union acpi_operand_object **return_object_ptr) 252 { 253 union acpi_operand_object *return_object = *return_object_ptr; 254 acpi_status status; 255 256 status = acpi_ns_check_sorted_list(info, return_object, 0, 2, 1, 257 ACPI_SORT_ASCENDING, 258 "AmbientIlluminance"); 259 260 return (status); 261 } 262 263 /****************************************************************************** 264 * 265 * FUNCTION: acpi_ns_repair_FDE 266 * 267 * PARAMETERS: info - Method execution information block 268 * return_object_ptr - Pointer to the object returned from the 269 * evaluation of a method or object 270 * 271 * RETURN: Status. AE_OK if object is OK or was repaired successfully 272 * 273 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return 274 * value is a Buffer of 5 DWORDs. This function repairs a common 275 * problem where the return value is a Buffer of BYTEs, not 276 * DWORDs. 277 * 278 *****************************************************************************/ 279 280 static acpi_status 281 acpi_ns_repair_FDE(struct acpi_evaluate_info *info, 282 union acpi_operand_object **return_object_ptr) 283 { 284 union acpi_operand_object *return_object = *return_object_ptr; 285 union acpi_operand_object *buffer_object; 286 u8 *byte_buffer; 287 u32 *dword_buffer; 288 u32 i; 289 290 ACPI_FUNCTION_NAME(ns_repair_FDE); 291 292 switch (return_object->common.type) { 293 case ACPI_TYPE_BUFFER: 294 295 /* This is the expected type. Length should be (at least) 5 DWORDs */ 296 297 if (return_object->buffer.length >= ACPI_FDE_DWORD_BUFFER_SIZE) { 298 return (AE_OK); 299 } 300 301 /* We can only repair if we have exactly 5 BYTEs */ 302 303 if (return_object->buffer.length != ACPI_FDE_BYTE_BUFFER_SIZE) { 304 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 305 info->node_flags, 306 "Incorrect return buffer length %u, expected %u", 307 return_object->buffer.length, 308 ACPI_FDE_DWORD_BUFFER_SIZE)); 309 310 return (AE_AML_OPERAND_TYPE); 311 } 312 313 /* Create the new (larger) buffer object */ 314 315 buffer_object = 316 acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE); 317 if (!buffer_object) { 318 return (AE_NO_MEMORY); 319 } 320 321 /* Expand each byte to a DWORD */ 322 323 byte_buffer = return_object->buffer.pointer; 324 dword_buffer = 325 ACPI_CAST_PTR(u32, buffer_object->buffer.pointer); 326 327 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) { 328 *dword_buffer = (u32) *byte_buffer; 329 dword_buffer++; 330 byte_buffer++; 331 } 332 333 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 334 "%s Expanded Byte Buffer to expected DWord Buffer\n", 335 info->full_pathname)); 336 break; 337 338 default: 339 340 return (AE_AML_OPERAND_TYPE); 341 } 342 343 /* Delete the original return object, return the new buffer object */ 344 345 acpi_ut_remove_reference(return_object); 346 *return_object_ptr = buffer_object; 347 348 info->return_flags |= ACPI_OBJECT_REPAIRED; 349 return (AE_OK); 350 } 351 352 /****************************************************************************** 353 * 354 * FUNCTION: acpi_ns_repair_CID 355 * 356 * PARAMETERS: info - Method execution information block 357 * return_object_ptr - Pointer to the object returned from the 358 * evaluation of a method or object 359 * 360 * RETURN: Status. AE_OK if object is OK or was repaired successfully 361 * 362 * DESCRIPTION: Repair for the _CID object. If a string, ensure that all 363 * letters are uppercase and that there is no leading asterisk. 364 * If a Package, ensure same for all string elements. 365 * 366 *****************************************************************************/ 367 368 static acpi_status 369 acpi_ns_repair_CID(struct acpi_evaluate_info *info, 370 union acpi_operand_object **return_object_ptr) 371 { 372 acpi_status status; 373 union acpi_operand_object *return_object = *return_object_ptr; 374 union acpi_operand_object **element_ptr; 375 union acpi_operand_object *original_element; 376 u16 original_ref_count; 377 u32 i; 378 379 /* Check for _CID as a simple string */ 380 381 if (return_object->common.type == ACPI_TYPE_STRING) { 382 status = acpi_ns_repair_HID(info, return_object_ptr); 383 return (status); 384 } 385 386 /* Exit if not a Package */ 387 388 if (return_object->common.type != ACPI_TYPE_PACKAGE) { 389 return (AE_OK); 390 } 391 392 /* Examine each element of the _CID package */ 393 394 element_ptr = return_object->package.elements; 395 for (i = 0; i < return_object->package.count; i++) { 396 original_element = *element_ptr; 397 original_ref_count = original_element->common.reference_count; 398 399 status = acpi_ns_repair_HID(info, element_ptr); 400 if (ACPI_FAILURE(status)) { 401 return (status); 402 } 403 404 /* Take care with reference counts */ 405 406 if (original_element != *element_ptr) { 407 408 /* Element was replaced */ 409 410 (*element_ptr)->common.reference_count = 411 original_ref_count; 412 413 acpi_ut_remove_reference(original_element); 414 } 415 416 element_ptr++; 417 } 418 419 return (AE_OK); 420 } 421 422 /****************************************************************************** 423 * 424 * FUNCTION: acpi_ns_repair_CST 425 * 426 * PARAMETERS: info - Method execution information block 427 * return_object_ptr - Pointer to the object returned from the 428 * evaluation of a method or object 429 * 430 * RETURN: Status. AE_OK if object is OK or was repaired successfully 431 * 432 * DESCRIPTION: Repair for the _CST object: 433 * 1. Sort the list ascending by C state type 434 * 2. Ensure type cannot be zero 435 * 3. A subpackage count of zero means _CST is meaningless 436 * 4. Count must match the number of C state subpackages 437 * 438 *****************************************************************************/ 439 440 static acpi_status 441 acpi_ns_repair_CST(struct acpi_evaluate_info *info, 442 union acpi_operand_object **return_object_ptr) 443 { 444 union acpi_operand_object *return_object = *return_object_ptr; 445 union acpi_operand_object **outer_elements; 446 u32 outer_element_count; 447 union acpi_operand_object *obj_desc; 448 acpi_status status; 449 u8 removing; 450 u32 i; 451 452 ACPI_FUNCTION_NAME(ns_repair_CST); 453 454 /* 455 * Check if the C-state type values are proportional. 456 */ 457 outer_element_count = return_object->package.count - 1; 458 i = 0; 459 while (i < outer_element_count) { 460 outer_elements = &return_object->package.elements[i + 1]; 461 removing = FALSE; 462 463 if ((*outer_elements)->package.count == 0) { 464 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 465 info->node_flags, 466 "SubPackage[%u] - removing entry due to zero count", 467 i)); 468 removing = TRUE; 469 goto remove_element; 470 } 471 472 obj_desc = (*outer_elements)->package.elements[1]; /* Index1 = Type */ 473 if ((u32)obj_desc->integer.value == 0) { 474 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 475 info->node_flags, 476 "SubPackage[%u] - removing entry due to invalid Type(0)", 477 i)); 478 removing = TRUE; 479 } 480 481 remove_element: 482 if (removing) { 483 acpi_ns_remove_element(return_object, i + 1); 484 outer_element_count--; 485 } else { 486 i++; 487 } 488 } 489 490 /* Update top-level package count, Type "Integer" checked elsewhere */ 491 492 obj_desc = return_object->package.elements[0]; 493 obj_desc->integer.value = outer_element_count; 494 495 /* 496 * Entries (subpackages) in the _CST Package must be sorted by the 497 * C-state type, in ascending order. 498 */ 499 status = acpi_ns_check_sorted_list(info, return_object, 1, 4, 1, 500 ACPI_SORT_ASCENDING, "C-State Type"); 501 if (ACPI_FAILURE(status)) { 502 return (status); 503 } 504 505 return (AE_OK); 506 } 507 508 /****************************************************************************** 509 * 510 * FUNCTION: acpi_ns_repair_HID 511 * 512 * PARAMETERS: info - Method execution information block 513 * return_object_ptr - Pointer to the object returned from the 514 * evaluation of a method or object 515 * 516 * RETURN: Status. AE_OK if object is OK or was repaired successfully 517 * 518 * DESCRIPTION: Repair for the _HID object. If a string, ensure that all 519 * letters are uppercase and that there is no leading asterisk. 520 * 521 *****************************************************************************/ 522 523 static acpi_status 524 acpi_ns_repair_HID(struct acpi_evaluate_info *info, 525 union acpi_operand_object **return_object_ptr) 526 { 527 union acpi_operand_object *return_object = *return_object_ptr; 528 union acpi_operand_object *new_string; 529 char *source; 530 char *dest; 531 532 ACPI_FUNCTION_NAME(ns_repair_HID); 533 534 /* We only care about string _HID objects (not integers) */ 535 536 if (return_object->common.type != ACPI_TYPE_STRING) { 537 return (AE_OK); 538 } 539 540 if (return_object->string.length == 0) { 541 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 542 info->node_flags, 543 "Invalid zero-length _HID or _CID string")); 544 545 /* Return AE_OK anyway, let driver handle it */ 546 547 info->return_flags |= ACPI_OBJECT_REPAIRED; 548 return (AE_OK); 549 } 550 551 /* It is simplest to always create a new string object */ 552 553 new_string = acpi_ut_create_string_object(return_object->string.length); 554 if (!new_string) { 555 return (AE_NO_MEMORY); 556 } 557 558 /* 559 * Remove a leading asterisk if present. For some unknown reason, there 560 * are many machines in the field that contains IDs like this. 561 * 562 * Examples: "*PNP0C03", "*ACPI0003" 563 */ 564 source = return_object->string.pointer; 565 if (*source == '*') { 566 source++; 567 new_string->string.length--; 568 569 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 570 "%s: Removed invalid leading asterisk\n", 571 info->full_pathname)); 572 } 573 574 /* 575 * Copy and uppercase the string. From the ACPI 5.0 specification: 576 * 577 * A valid PNP ID must be of the form "AAA####" where A is an uppercase 578 * letter and # is a hex digit. A valid ACPI ID must be of the form 579 * "NNNN####" where N is an uppercase letter or decimal digit, and 580 * # is a hex digit. 581 */ 582 for (dest = new_string->string.pointer; *source; dest++, source++) { 583 *dest = (char)ACPI_TOUPPER(*source); 584 } 585 586 acpi_ut_remove_reference(return_object); 587 *return_object_ptr = new_string; 588 return (AE_OK); 589 } 590 591 /****************************************************************************** 592 * 593 * FUNCTION: acpi_ns_repair_PRT 594 * 595 * PARAMETERS: info - Method execution information block 596 * return_object_ptr - Pointer to the object returned from the 597 * evaluation of a method or object 598 * 599 * RETURN: Status. AE_OK if object is OK or was repaired successfully 600 * 601 * DESCRIPTION: Repair for the _PRT object. If necessary, fix reversed 602 * source_name and source_index field, a common BIOS bug. 603 * 604 *****************************************************************************/ 605 606 static acpi_status 607 acpi_ns_repair_PRT(struct acpi_evaluate_info *info, 608 union acpi_operand_object **return_object_ptr) 609 { 610 union acpi_operand_object *package_object = *return_object_ptr; 611 union acpi_operand_object **top_object_list; 612 union acpi_operand_object **sub_object_list; 613 union acpi_operand_object *obj_desc; 614 union acpi_operand_object *sub_package; 615 u32 element_count; 616 u32 index; 617 618 /* Each element in the _PRT package is a subpackage */ 619 620 top_object_list = package_object->package.elements; 621 element_count = package_object->package.count; 622 623 /* Examine each subpackage */ 624 625 for (index = 0; index < element_count; index++, top_object_list++) { 626 sub_package = *top_object_list; 627 sub_object_list = sub_package->package.elements; 628 629 /* Check for minimum required element count */ 630 631 if (sub_package->package.count < 4) { 632 continue; 633 } 634 635 /* 636 * If the BIOS has erroneously reversed the _PRT source_name (index 2) 637 * and the source_index (index 3), fix it. _PRT is important enough to 638 * workaround this BIOS error. This also provides compatibility with 639 * other ACPI implementations. 640 */ 641 obj_desc = sub_object_list[3]; 642 if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) { 643 sub_object_list[3] = sub_object_list[2]; 644 sub_object_list[2] = obj_desc; 645 info->return_flags |= ACPI_OBJECT_REPAIRED; 646 647 ACPI_WARN_PREDEFINED((AE_INFO, 648 info->full_pathname, 649 info->node_flags, 650 "PRT[%X]: Fixed reversed SourceName and SourceIndex", 651 index)); 652 } 653 } 654 655 return (AE_OK); 656 } 657 658 /****************************************************************************** 659 * 660 * FUNCTION: acpi_ns_repair_PSS 661 * 662 * PARAMETERS: info - Method execution information block 663 * return_object_ptr - Pointer to the object returned from the 664 * evaluation of a method or object 665 * 666 * RETURN: Status. AE_OK if object is OK or was repaired successfully 667 * 668 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list 669 * by the CPU frequencies. Check that the power dissipation values 670 * are all proportional to CPU frequency (i.e., sorting by 671 * frequency should be the same as sorting by power.) 672 * 673 *****************************************************************************/ 674 675 static acpi_status 676 acpi_ns_repair_PSS(struct acpi_evaluate_info *info, 677 union acpi_operand_object **return_object_ptr) 678 { 679 union acpi_operand_object *return_object = *return_object_ptr; 680 union acpi_operand_object **outer_elements; 681 u32 outer_element_count; 682 union acpi_operand_object **elements; 683 union acpi_operand_object *obj_desc; 684 u32 previous_value; 685 acpi_status status; 686 u32 i; 687 688 /* 689 * Entries (subpackages) in the _PSS Package must be sorted by power 690 * dissipation, in descending order. If it appears that the list is 691 * incorrectly sorted, sort it. We sort by cpu_frequency, since this 692 * should be proportional to the power. 693 */ 694 status = acpi_ns_check_sorted_list(info, return_object, 0, 6, 0, 695 ACPI_SORT_DESCENDING, 696 "CpuFrequency"); 697 if (ACPI_FAILURE(status)) { 698 return (status); 699 } 700 701 /* 702 * We now know the list is correctly sorted by CPU frequency. Check if 703 * the power dissipation values are proportional. 704 */ 705 previous_value = ACPI_UINT32_MAX; 706 outer_elements = return_object->package.elements; 707 outer_element_count = return_object->package.count; 708 709 for (i = 0; i < outer_element_count; i++) { 710 elements = (*outer_elements)->package.elements; 711 obj_desc = elements[1]; /* Index1 = power_dissipation */ 712 713 if ((u32) obj_desc->integer.value > previous_value) { 714 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 715 info->node_flags, 716 "SubPackage[%u,%u] - suspicious power dissipation values", 717 i - 1, i)); 718 } 719 720 previous_value = (u32) obj_desc->integer.value; 721 outer_elements++; 722 } 723 724 return (AE_OK); 725 } 726 727 /****************************************************************************** 728 * 729 * FUNCTION: acpi_ns_repair_TSS 730 * 731 * PARAMETERS: info - Method execution information block 732 * return_object_ptr - 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 _TSS object. If necessary, sort the object list 738 * descending by the power dissipation values. 739 * 740 *****************************************************************************/ 741 742 static acpi_status 743 acpi_ns_repair_TSS(struct acpi_evaluate_info *info, 744 union acpi_operand_object **return_object_ptr) 745 { 746 union acpi_operand_object *return_object = *return_object_ptr; 747 acpi_status status; 748 struct acpi_namespace_node *node; 749 750 /* 751 * We can only sort the _TSS return package if there is no _PSS in the 752 * same scope. This is because if _PSS is present, the ACPI specification 753 * dictates that the _TSS Power Dissipation field is to be ignored, and 754 * therefore some BIOSs leave garbage values in the _TSS Power field(s). 755 * In this case, it is best to just return the _TSS package as-is. 756 * (May, 2011) 757 */ 758 status = acpi_ns_get_node(info->node, "^_PSS", 759 ACPI_NS_NO_UPSEARCH, &node); 760 if (ACPI_SUCCESS(status)) { 761 return (AE_OK); 762 } 763 764 status = acpi_ns_check_sorted_list(info, return_object, 0, 5, 1, 765 ACPI_SORT_DESCENDING, 766 "PowerDissipation"); 767 768 return (status); 769 } 770 771 /****************************************************************************** 772 * 773 * FUNCTION: acpi_ns_check_sorted_list 774 * 775 * PARAMETERS: info - Method execution information block 776 * return_object - Pointer to the top-level returned object 777 * start_index - Index of the first subpackage 778 * expected_count - Minimum length of each subpackage 779 * sort_index - Subpackage entry to sort on 780 * sort_direction - Ascending or descending 781 * sort_key_name - Name of the sort_index field 782 * 783 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or 784 * has been repaired by sorting the list. 785 * 786 * DESCRIPTION: Check if the package list is valid and sorted correctly by the 787 * sort_index. If not, then sort the list. 788 * 789 *****************************************************************************/ 790 791 static acpi_status 792 acpi_ns_check_sorted_list(struct acpi_evaluate_info *info, 793 union acpi_operand_object *return_object, 794 u32 start_index, 795 u32 expected_count, 796 u32 sort_index, 797 u8 sort_direction, char *sort_key_name) 798 { 799 u32 outer_element_count; 800 union acpi_operand_object **outer_elements; 801 union acpi_operand_object **elements; 802 union acpi_operand_object *obj_desc; 803 u32 i; 804 u32 previous_value; 805 806 ACPI_FUNCTION_NAME(ns_check_sorted_list); 807 808 /* The top-level object must be a package */ 809 810 if (return_object->common.type != ACPI_TYPE_PACKAGE) { 811 return (AE_AML_OPERAND_TYPE); 812 } 813 814 /* 815 * NOTE: assumes list of subpackages contains no NULL elements. 816 * Any NULL elements should have been removed by earlier call 817 * to acpi_ns_remove_null_elements. 818 */ 819 outer_element_count = return_object->package.count; 820 if (!outer_element_count || start_index >= outer_element_count) { 821 return (AE_AML_PACKAGE_LIMIT); 822 } 823 824 outer_elements = &return_object->package.elements[start_index]; 825 outer_element_count -= start_index; 826 827 previous_value = 0; 828 if (sort_direction == ACPI_SORT_DESCENDING) { 829 previous_value = ACPI_UINT32_MAX; 830 } 831 832 /* Examine each subpackage */ 833 834 for (i = 0; i < outer_element_count; i++) { 835 836 /* Each element of the top-level package must also be a package */ 837 838 if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) { 839 return (AE_AML_OPERAND_TYPE); 840 } 841 842 /* Each subpackage must have the minimum length */ 843 844 if ((*outer_elements)->package.count < expected_count) { 845 return (AE_AML_PACKAGE_LIMIT); 846 } 847 848 elements = (*outer_elements)->package.elements; 849 obj_desc = elements[sort_index]; 850 851 if (obj_desc->common.type != ACPI_TYPE_INTEGER) { 852 return (AE_AML_OPERAND_TYPE); 853 } 854 855 /* 856 * The list must be sorted in the specified order. If we detect a 857 * discrepancy, sort the entire list. 858 */ 859 if (((sort_direction == ACPI_SORT_ASCENDING) && 860 (obj_desc->integer.value < previous_value)) || 861 ((sort_direction == ACPI_SORT_DESCENDING) && 862 (obj_desc->integer.value > previous_value))) { 863 acpi_ns_sort_list(&return_object->package. 864 elements[start_index], 865 outer_element_count, sort_index, 866 sort_direction); 867 868 info->return_flags |= ACPI_OBJECT_REPAIRED; 869 870 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 871 "%s: Repaired unsorted list - now sorted by %s\n", 872 info->full_pathname, sort_key_name)); 873 return (AE_OK); 874 } 875 876 previous_value = (u32) obj_desc->integer.value; 877 outer_elements++; 878 } 879 880 return (AE_OK); 881 } 882 883 /****************************************************************************** 884 * 885 * FUNCTION: acpi_ns_sort_list 886 * 887 * PARAMETERS: elements - Package object element list 888 * count - Element count for above 889 * index - Sort by which package element 890 * sort_direction - Ascending or Descending sort 891 * 892 * RETURN: None 893 * 894 * DESCRIPTION: Sort the objects that are in a package element list. 895 * 896 * NOTE: Assumes that all NULL elements have been removed from the package, 897 * and that all elements have been verified to be of type Integer. 898 * 899 *****************************************************************************/ 900 901 static void 902 acpi_ns_sort_list(union acpi_operand_object **elements, 903 u32 count, u32 index, u8 sort_direction) 904 { 905 union acpi_operand_object *obj_desc1; 906 union acpi_operand_object *obj_desc2; 907 union acpi_operand_object *temp_obj; 908 u32 i; 909 u32 j; 910 911 /* Simple bubble sort */ 912 913 for (i = 1; i < count; i++) { 914 for (j = (count - 1); j >= i; j--) { 915 obj_desc1 = elements[j - 1]->package.elements[index]; 916 obj_desc2 = elements[j]->package.elements[index]; 917 918 if (((sort_direction == ACPI_SORT_ASCENDING) && 919 (obj_desc1->integer.value > 920 obj_desc2->integer.value)) 921 || ((sort_direction == ACPI_SORT_DESCENDING) 922 && (obj_desc1->integer.value < 923 obj_desc2->integer.value))) { 924 temp_obj = elements[j - 1]; 925 elements[j - 1] = elements[j]; 926 elements[j] = temp_obj; 927 } 928 } 929 } 930 } 931 932 /****************************************************************************** 933 * 934 * FUNCTION: acpi_ns_remove_element 935 * 936 * PARAMETERS: obj_desc - Package object element list 937 * index - Index of element to remove 938 * 939 * RETURN: None 940 * 941 * DESCRIPTION: Remove the requested element of a package and delete it. 942 * 943 *****************************************************************************/ 944 945 static void 946 acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index) 947 { 948 union acpi_operand_object **source; 949 union acpi_operand_object **dest; 950 u32 count; 951 u32 new_count; 952 u32 i; 953 954 ACPI_FUNCTION_NAME(ns_remove_element); 955 956 count = obj_desc->package.count; 957 new_count = count - 1; 958 959 source = obj_desc->package.elements; 960 dest = source; 961 962 /* Examine all elements of the package object, remove matched index */ 963 964 for (i = 0; i < count; i++) { 965 if (i == index) { 966 acpi_ut_remove_reference(*source); /* Remove one ref for being in pkg */ 967 acpi_ut_remove_reference(*source); 968 } else { 969 *dest = *source; 970 dest++; 971 } 972 source++; 973 } 974 975 /* NULL terminate list and update the package count */ 976 977 *dest = NULL; 978 obj_desc->package.count = new_count; 979 } 980