1 /****************************************************************************** 2 * 3 * Module Name: nsrepair2 - Repair for objects returned by specific 4 * predefined methods 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2013, 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 sub-package count of zero means _CST is meaningless 436 * 4. Count must match the number of C state sub-packages 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 u32 element_count; 615 u32 index; 616 617 /* Each element in the _PRT package is a subpackage */ 618 619 top_object_list = package_object->package.elements; 620 element_count = package_object->package.count; 621 622 for (index = 0; index < element_count; index++) { 623 sub_object_list = (*top_object_list)->package.elements; 624 625 /* 626 * If the BIOS has erroneously reversed the _PRT source_name (index 2) 627 * and the source_index (index 3), fix it. _PRT is important enough to 628 * workaround this BIOS error. This also provides compatibility with 629 * other ACPI implementations. 630 */ 631 obj_desc = sub_object_list[3]; 632 if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) { 633 sub_object_list[3] = sub_object_list[2]; 634 sub_object_list[2] = obj_desc; 635 info->return_flags |= ACPI_OBJECT_REPAIRED; 636 637 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 638 info->node_flags, 639 "PRT[%X]: Fixed reversed SourceName and SourceIndex", 640 index)); 641 } 642 643 /* Point to the next union acpi_operand_object in the top level package */ 644 645 top_object_list++; 646 } 647 648 return (AE_OK); 649 } 650 651 /****************************************************************************** 652 * 653 * FUNCTION: acpi_ns_repair_PSS 654 * 655 * PARAMETERS: info - Method execution information block 656 * return_object_ptr - Pointer to the object returned from the 657 * evaluation of a method or object 658 * 659 * RETURN: Status. AE_OK if object is OK or was repaired successfully 660 * 661 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list 662 * by the CPU frequencies. Check that the power dissipation values 663 * are all proportional to CPU frequency (i.e., sorting by 664 * frequency should be the same as sorting by power.) 665 * 666 *****************************************************************************/ 667 668 static acpi_status 669 acpi_ns_repair_PSS(struct acpi_evaluate_info *info, 670 union acpi_operand_object **return_object_ptr) 671 { 672 union acpi_operand_object *return_object = *return_object_ptr; 673 union acpi_operand_object **outer_elements; 674 u32 outer_element_count; 675 union acpi_operand_object **elements; 676 union acpi_operand_object *obj_desc; 677 u32 previous_value; 678 acpi_status status; 679 u32 i; 680 681 /* 682 * Entries (sub-packages) in the _PSS Package must be sorted by power 683 * dissipation, in descending order. If it appears that the list is 684 * incorrectly sorted, sort it. We sort by cpu_frequency, since this 685 * should be proportional to the power. 686 */ 687 status = acpi_ns_check_sorted_list(info, return_object, 0, 6, 0, 688 ACPI_SORT_DESCENDING, 689 "CpuFrequency"); 690 if (ACPI_FAILURE(status)) { 691 return (status); 692 } 693 694 /* 695 * We now know the list is correctly sorted by CPU frequency. Check if 696 * the power dissipation values are proportional. 697 */ 698 previous_value = ACPI_UINT32_MAX; 699 outer_elements = return_object->package.elements; 700 outer_element_count = return_object->package.count; 701 702 for (i = 0; i < outer_element_count; i++) { 703 elements = (*outer_elements)->package.elements; 704 obj_desc = elements[1]; /* Index1 = power_dissipation */ 705 706 if ((u32) obj_desc->integer.value > previous_value) { 707 ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, 708 info->node_flags, 709 "SubPackage[%u,%u] - suspicious power dissipation values", 710 i - 1, i)); 711 } 712 713 previous_value = (u32) obj_desc->integer.value; 714 outer_elements++; 715 } 716 717 return (AE_OK); 718 } 719 720 /****************************************************************************** 721 * 722 * FUNCTION: acpi_ns_repair_TSS 723 * 724 * PARAMETERS: info - Method execution information block 725 * return_object_ptr - Pointer to the object returned from the 726 * evaluation of a method or object 727 * 728 * RETURN: Status. AE_OK if object is OK or was repaired successfully 729 * 730 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list 731 * descending by the power dissipation values. 732 * 733 *****************************************************************************/ 734 735 static acpi_status 736 acpi_ns_repair_TSS(struct acpi_evaluate_info *info, 737 union acpi_operand_object **return_object_ptr) 738 { 739 union acpi_operand_object *return_object = *return_object_ptr; 740 acpi_status status; 741 struct acpi_namespace_node *node; 742 743 /* 744 * We can only sort the _TSS return package if there is no _PSS in the 745 * same scope. This is because if _PSS is present, the ACPI specification 746 * dictates that the _TSS Power Dissipation field is to be ignored, and 747 * therefore some BIOSs leave garbage values in the _TSS Power field(s). 748 * In this case, it is best to just return the _TSS package as-is. 749 * (May, 2011) 750 */ 751 status = acpi_ns_get_node(info->node, "^_PSS", 752 ACPI_NS_NO_UPSEARCH, &node); 753 if (ACPI_SUCCESS(status)) { 754 return (AE_OK); 755 } 756 757 status = acpi_ns_check_sorted_list(info, return_object, 0, 5, 1, 758 ACPI_SORT_DESCENDING, 759 "PowerDissipation"); 760 761 return (status); 762 } 763 764 /****************************************************************************** 765 * 766 * FUNCTION: acpi_ns_check_sorted_list 767 * 768 * PARAMETERS: info - Method execution information block 769 * return_object - Pointer to the top-level returned object 770 * start_index - Index of the first sub-package 771 * expected_count - Minimum length of each sub-package 772 * sort_index - Sub-package entry to sort on 773 * sort_direction - Ascending or descending 774 * sort_key_name - Name of the sort_index field 775 * 776 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or 777 * has been repaired by sorting the list. 778 * 779 * DESCRIPTION: Check if the package list is valid and sorted correctly by the 780 * sort_index. If not, then sort the list. 781 * 782 *****************************************************************************/ 783 784 static acpi_status 785 acpi_ns_check_sorted_list(struct acpi_evaluate_info *info, 786 union acpi_operand_object *return_object, 787 u32 start_index, 788 u32 expected_count, 789 u32 sort_index, 790 u8 sort_direction, char *sort_key_name) 791 { 792 u32 outer_element_count; 793 union acpi_operand_object **outer_elements; 794 union acpi_operand_object **elements; 795 union acpi_operand_object *obj_desc; 796 u32 i; 797 u32 previous_value; 798 799 ACPI_FUNCTION_NAME(ns_check_sorted_list); 800 801 /* The top-level object must be a package */ 802 803 if (return_object->common.type != ACPI_TYPE_PACKAGE) { 804 return (AE_AML_OPERAND_TYPE); 805 } 806 807 /* 808 * NOTE: assumes list of sub-packages contains no NULL elements. 809 * Any NULL elements should have been removed by earlier call 810 * to acpi_ns_remove_null_elements. 811 */ 812 outer_element_count = return_object->package.count; 813 if (!outer_element_count || start_index >= outer_element_count) { 814 return (AE_AML_PACKAGE_LIMIT); 815 } 816 817 outer_elements = &return_object->package.elements[start_index]; 818 outer_element_count -= start_index; 819 820 previous_value = 0; 821 if (sort_direction == ACPI_SORT_DESCENDING) { 822 previous_value = ACPI_UINT32_MAX; 823 } 824 825 /* Examine each subpackage */ 826 827 for (i = 0; i < outer_element_count; i++) { 828 829 /* Each element of the top-level package must also be a package */ 830 831 if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) { 832 return (AE_AML_OPERAND_TYPE); 833 } 834 835 /* Each sub-package must have the minimum length */ 836 837 if ((*outer_elements)->package.count < expected_count) { 838 return (AE_AML_PACKAGE_LIMIT); 839 } 840 841 elements = (*outer_elements)->package.elements; 842 obj_desc = elements[sort_index]; 843 844 if (obj_desc->common.type != ACPI_TYPE_INTEGER) { 845 return (AE_AML_OPERAND_TYPE); 846 } 847 848 /* 849 * The list must be sorted in the specified order. If we detect a 850 * discrepancy, sort the entire list. 851 */ 852 if (((sort_direction == ACPI_SORT_ASCENDING) && 853 (obj_desc->integer.value < previous_value)) || 854 ((sort_direction == ACPI_SORT_DESCENDING) && 855 (obj_desc->integer.value > previous_value))) { 856 acpi_ns_sort_list(&return_object->package. 857 elements[start_index], 858 outer_element_count, sort_index, 859 sort_direction); 860 861 info->return_flags |= ACPI_OBJECT_REPAIRED; 862 863 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR, 864 "%s: Repaired unsorted list - now sorted by %s\n", 865 info->full_pathname, sort_key_name)); 866 return (AE_OK); 867 } 868 869 previous_value = (u32) obj_desc->integer.value; 870 outer_elements++; 871 } 872 873 return (AE_OK); 874 } 875 876 /****************************************************************************** 877 * 878 * FUNCTION: acpi_ns_sort_list 879 * 880 * PARAMETERS: elements - Package object element list 881 * count - Element count for above 882 * index - Sort by which package element 883 * sort_direction - Ascending or Descending sort 884 * 885 * RETURN: None 886 * 887 * DESCRIPTION: Sort the objects that are in a package element list. 888 * 889 * NOTE: Assumes that all NULL elements have been removed from the package, 890 * and that all elements have been verified to be of type Integer. 891 * 892 *****************************************************************************/ 893 894 static void 895 acpi_ns_sort_list(union acpi_operand_object **elements, 896 u32 count, u32 index, u8 sort_direction) 897 { 898 union acpi_operand_object *obj_desc1; 899 union acpi_operand_object *obj_desc2; 900 union acpi_operand_object *temp_obj; 901 u32 i; 902 u32 j; 903 904 /* Simple bubble sort */ 905 906 for (i = 1; i < count; i++) { 907 for (j = (count - 1); j >= i; j--) { 908 obj_desc1 = elements[j - 1]->package.elements[index]; 909 obj_desc2 = elements[j]->package.elements[index]; 910 911 if (((sort_direction == ACPI_SORT_ASCENDING) && 912 (obj_desc1->integer.value > 913 obj_desc2->integer.value)) 914 || ((sort_direction == ACPI_SORT_DESCENDING) 915 && (obj_desc1->integer.value < 916 obj_desc2->integer.value))) { 917 temp_obj = elements[j - 1]; 918 elements[j - 1] = elements[j]; 919 elements[j] = temp_obj; 920 } 921 } 922 } 923 } 924 925 /****************************************************************************** 926 * 927 * FUNCTION: acpi_ns_remove_element 928 * 929 * PARAMETERS: obj_desc - Package object element list 930 * index - Index of element to remove 931 * 932 * RETURN: None 933 * 934 * DESCRIPTION: Remove the requested element of a package and delete it. 935 * 936 *****************************************************************************/ 937 938 static void 939 acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index) 940 { 941 union acpi_operand_object **source; 942 union acpi_operand_object **dest; 943 u32 count; 944 u32 new_count; 945 u32 i; 946 947 ACPI_FUNCTION_NAME(ns_remove_element); 948 949 count = obj_desc->package.count; 950 new_count = count - 1; 951 952 source = obj_desc->package.elements; 953 dest = source; 954 955 /* Examine all elements of the package object, remove matched index */ 956 957 for (i = 0; i < count; i++) { 958 if (i == index) { 959 acpi_ut_remove_reference(*source); /* Remove one ref for being in pkg */ 960 acpi_ut_remove_reference(*source); 961 } else { 962 *dest = *source; 963 dest++; 964 } 965 source++; 966 } 967 968 /* NULL terminate list and update the package count */ 969 970 *dest = NULL; 971 obj_desc->package.count = new_count; 972 } 973