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1/******************************************************************************
2 *
3 * Module Name: nsrepair2 - Repair for objects returned by specific
4 * predefined methods
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2011, 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
50ACPI_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 */
56typedef
57acpi_status(*acpi_repair_function) (struct acpi_predefined_data *data,
58 union acpi_operand_object **return_object_ptr);
59
60typedef struct acpi_repair_info {
61 char name[ACPI_NAME_SIZE];
62 acpi_repair_function repair_function;
63
64} acpi_repair_info;
65
66/* Local prototypes */
67
68static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
69 acpi_namespace_node
70 *node);
71
72static acpi_status
73acpi_ns_repair_ALR(struct acpi_predefined_data *data,
74 union acpi_operand_object **return_object_ptr);
75
76static acpi_status
77acpi_ns_repair_CID(struct acpi_predefined_data *data,
78 union acpi_operand_object **return_object_ptr);
79
80static acpi_status
81acpi_ns_repair_FDE(struct acpi_predefined_data *data,
82 union acpi_operand_object **return_object_ptr);
83
84static acpi_status
85acpi_ns_repair_HID(struct acpi_predefined_data *data,
86 union acpi_operand_object **return_object_ptr);
87
88static acpi_status
89acpi_ns_repair_PSS(struct acpi_predefined_data *data,
90 union acpi_operand_object **return_object_ptr);
91
92static acpi_status
93acpi_ns_repair_TSS(struct acpi_predefined_data *data,
94 union acpi_operand_object **return_object_ptr);
95
96static acpi_status
97acpi_ns_check_sorted_list(struct acpi_predefined_data *data,
98 union acpi_operand_object *return_object,
99 u32 expected_count,
100 u32 sort_index,
101 u8 sort_direction, char *sort_key_name);
102
103static void
104acpi_ns_sort_list(union acpi_operand_object **elements,
105 u32 count, u32 index, u8 sort_direction);
106
107/* Values for sort_direction above */
108
109#define ACPI_SORT_ASCENDING 0
110#define ACPI_SORT_DESCENDING 1
111
112/*
113 * This table contains the names of the predefined methods for which we can
114 * perform more complex repairs.
115 *
116 * As necessary:
117 *
118 * _ALR: Sort the list ascending by ambient_illuminance
119 * _CID: Strings: uppercase all, remove any leading asterisk
120 * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs
121 * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs
122 * _HID: Strings: uppercase all, remove any leading asterisk
123 * _PSS: Sort the list descending by Power
124 * _TSS: Sort the list descending by Power
125 *
126 * Names that must be packages, but cannot be sorted:
127 *
128 * _BCL: Values are tied to the Package index where they appear, and cannot
129 * be moved or sorted. These index values are used for _BQC and _BCM.
130 * However, we can fix the case where a buffer is returned, by converting
131 * it to a Package of integers.
132 */
133static const struct acpi_repair_info acpi_ns_repairable_names[] = {
134 {"_ALR", acpi_ns_repair_ALR},
135 {"_CID", acpi_ns_repair_CID},
136 {"_FDE", acpi_ns_repair_FDE},
137 {"_GTM", acpi_ns_repair_FDE}, /* _GTM has same repair as _FDE */
138 {"_HID", acpi_ns_repair_HID},
139 {"_PSS", acpi_ns_repair_PSS},
140 {"_TSS", acpi_ns_repair_TSS},
141 {{0, 0, 0, 0}, NULL} /* Table terminator */
142};
143
144#define ACPI_FDE_FIELD_COUNT 5
145#define ACPI_FDE_BYTE_BUFFER_SIZE 5
146#define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * sizeof (u32))
147
148/******************************************************************************
149 *
150 * FUNCTION: acpi_ns_complex_repairs
151 *
152 * PARAMETERS: Data - Pointer to validation data structure
153 * Node - Namespace node for the method/object
154 * validate_status - Original status of earlier validation
155 * return_object_ptr - Pointer to the object returned from the
156 * evaluation of a method or object
157 *
158 * RETURN: Status. AE_OK if repair was successful. If name is not
159 * matched, validate_status is returned.
160 *
161 * DESCRIPTION: Attempt to repair/convert a return object of a type that was
162 * not expected.
163 *
164 *****************************************************************************/
165
166acpi_status
167acpi_ns_complex_repairs(struct acpi_predefined_data *data,
168 struct acpi_namespace_node *node,
169 acpi_status validate_status,
170 union acpi_operand_object **return_object_ptr)
171{
172 const struct acpi_repair_info *predefined;
173 acpi_status status;
174
175 /* Check if this name is in the list of repairable names */
176
177 predefined = acpi_ns_match_repairable_name(node);
178 if (!predefined) {
179 return (validate_status);
180 }
181
182 status = predefined->repair_function(data, return_object_ptr);
183 return (status);
184}
185
186/******************************************************************************
187 *
188 * FUNCTION: acpi_ns_match_repairable_name
189 *
190 * PARAMETERS: Node - Namespace node for the method/object
191 *
192 * RETURN: Pointer to entry in repair table. NULL indicates not found.
193 *
194 * DESCRIPTION: Check an object name against the repairable object list.
195 *
196 *****************************************************************************/
197
198static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
199 acpi_namespace_node
200 *node)
201{
202 const struct acpi_repair_info *this_name;
203
204 /* Search info table for a repairable predefined method/object name */
205
206 this_name = acpi_ns_repairable_names;
207 while (this_name->repair_function) {
208 if (ACPI_COMPARE_NAME(node->name.ascii, this_name->name)) {
209 return (this_name);
210 }
211 this_name++;
212 }
213
214 return (NULL); /* Not found */
215}
216
217/******************************************************************************
218 *
219 * FUNCTION: acpi_ns_repair_ALR
220 *
221 * PARAMETERS: Data - Pointer to validation data structure
222 * return_object_ptr - Pointer to the object returned from the
223 * evaluation of a method or object
224 *
225 * RETURN: Status. AE_OK if object is OK or was repaired successfully
226 *
227 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list
228 * ascending by the ambient illuminance values.
229 *
230 *****************************************************************************/
231
232static acpi_status
233acpi_ns_repair_ALR(struct acpi_predefined_data *data,
234 union acpi_operand_object **return_object_ptr)
235{
236 union acpi_operand_object *return_object = *return_object_ptr;
237 acpi_status status;
238
239 status = acpi_ns_check_sorted_list(data, return_object, 2, 1,
240 ACPI_SORT_ASCENDING,
241 "AmbientIlluminance");
242
243 return (status);
244}
245
246/******************************************************************************
247 *
248 * FUNCTION: acpi_ns_repair_FDE
249 *
250 * PARAMETERS: Data - Pointer to validation data structure
251 * return_object_ptr - Pointer to the object returned from the
252 * evaluation of a method or object
253 *
254 * RETURN: Status. AE_OK if object is OK or was repaired successfully
255 *
256 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return
257 * value is a Buffer of 5 DWORDs. This function repairs a common
258 * problem where the return value is a Buffer of BYTEs, not
259 * DWORDs.
260 *
261 *****************************************************************************/
262
263static acpi_status
264acpi_ns_repair_FDE(struct acpi_predefined_data *data,
265 union acpi_operand_object **return_object_ptr)
266{
267 union acpi_operand_object *return_object = *return_object_ptr;
268 union acpi_operand_object *buffer_object;
269 u8 *byte_buffer;
270 u32 *dword_buffer;
271 u32 i;
272
273 ACPI_FUNCTION_NAME(ns_repair_FDE);
274
275 switch (return_object->common.type) {
276 case ACPI_TYPE_BUFFER:
277
278 /* This is the expected type. Length should be (at least) 5 DWORDs */
279
280 if (return_object->buffer.length >= ACPI_FDE_DWORD_BUFFER_SIZE) {
281 return (AE_OK);
282 }
283
284 /* We can only repair if we have exactly 5 BYTEs */
285
286 if (return_object->buffer.length != ACPI_FDE_BYTE_BUFFER_SIZE) {
287 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
288 data->node_flags,
289 "Incorrect return buffer length %u, expected %u",
290 return_object->buffer.length,
291 ACPI_FDE_DWORD_BUFFER_SIZE));
292
293 return (AE_AML_OPERAND_TYPE);
294 }
295
296 /* Create the new (larger) buffer object */
297
298 buffer_object =
299 acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE);
300 if (!buffer_object) {
301 return (AE_NO_MEMORY);
302 }
303
304 /* Expand each byte to a DWORD */
305
306 byte_buffer = return_object->buffer.pointer;
307 dword_buffer =
308 ACPI_CAST_PTR(u32, buffer_object->buffer.pointer);
309
310 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) {
311 *dword_buffer = (u32) *byte_buffer;
312 dword_buffer++;
313 byte_buffer++;
314 }
315
316 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
317 "%s Expanded Byte Buffer to expected DWord Buffer\n",
318 data->pathname));
319 break;
320
321 default:
322 return (AE_AML_OPERAND_TYPE);
323 }
324
325 /* Delete the original return object, return the new buffer object */
326
327 acpi_ut_remove_reference(return_object);
328 *return_object_ptr = buffer_object;
329
330 data->flags |= ACPI_OBJECT_REPAIRED;
331 return (AE_OK);
332}
333
334/******************************************************************************
335 *
336 * FUNCTION: acpi_ns_repair_CID
337 *
338 * PARAMETERS: Data - Pointer to validation data structure
339 * return_object_ptr - Pointer to the object returned from the
340 * evaluation of a method or object
341 *
342 * RETURN: Status. AE_OK if object is OK or was repaired successfully
343 *
344 * DESCRIPTION: Repair for the _CID object. If a string, ensure that all
345 * letters are uppercase and that there is no leading asterisk.
346 * If a Package, ensure same for all string elements.
347 *
348 *****************************************************************************/
349
350static acpi_status
351acpi_ns_repair_CID(struct acpi_predefined_data *data,
352 union acpi_operand_object **return_object_ptr)
353{
354 acpi_status status;
355 union acpi_operand_object *return_object = *return_object_ptr;
356 union acpi_operand_object **element_ptr;
357 union acpi_operand_object *original_element;
358 u16 original_ref_count;
359 u32 i;
360
361 /* Check for _CID as a simple string */
362
363 if (return_object->common.type == ACPI_TYPE_STRING) {
364 status = acpi_ns_repair_HID(data, return_object_ptr);
365 return (status);
366 }
367
368 /* Exit if not a Package */
369
370 if (return_object->common.type != ACPI_TYPE_PACKAGE) {
371 return (AE_OK);
372 }
373
374 /* Examine each element of the _CID package */
375
376 element_ptr = return_object->package.elements;
377 for (i = 0; i < return_object->package.count; i++) {
378 original_element = *element_ptr;
379 original_ref_count = original_element->common.reference_count;
380
381 status = acpi_ns_repair_HID(data, element_ptr);
382 if (ACPI_FAILURE(status)) {
383 return (status);
384 }
385
386 /* Take care with reference counts */
387
388 if (original_element != *element_ptr) {
389
390 /* Element was replaced */
391
392 (*element_ptr)->common.reference_count =
393 original_ref_count;
394
395 acpi_ut_remove_reference(original_element);
396 }
397
398 element_ptr++;
399 }
400
401 return (AE_OK);
402}
403
404/******************************************************************************
405 *
406 * FUNCTION: acpi_ns_repair_HID
407 *
408 * PARAMETERS: Data - Pointer to validation data structure
409 * return_object_ptr - Pointer to the object returned from the
410 * evaluation of a method or object
411 *
412 * RETURN: Status. AE_OK if object is OK or was repaired successfully
413 *
414 * DESCRIPTION: Repair for the _HID object. If a string, ensure that all
415 * letters are uppercase and that there is no leading asterisk.
416 *
417 *****************************************************************************/
418
419static acpi_status
420acpi_ns_repair_HID(struct acpi_predefined_data *data,
421 union acpi_operand_object **return_object_ptr)
422{
423 union acpi_operand_object *return_object = *return_object_ptr;
424 union acpi_operand_object *new_string;
425 char *source;
426 char *dest;
427
428 ACPI_FUNCTION_NAME(ns_repair_HID);
429
430 /* We only care about string _HID objects (not integers) */
431
432 if (return_object->common.type != ACPI_TYPE_STRING) {
433 return (AE_OK);
434 }
435
436 if (return_object->string.length == 0) {
437 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
438 "Invalid zero-length _HID or _CID string"));
439
440 /* Return AE_OK anyway, let driver handle it */
441
442 data->flags |= ACPI_OBJECT_REPAIRED;
443 return (AE_OK);
444 }
445
446 /* It is simplest to always create a new string object */
447
448 new_string = acpi_ut_create_string_object(return_object->string.length);
449 if (!new_string) {
450 return (AE_NO_MEMORY);
451 }
452
453 /*
454 * Remove a leading asterisk if present. For some unknown reason, there
455 * are many machines in the field that contains IDs like this.
456 *
457 * Examples: "*PNP0C03", "*ACPI0003"
458 */
459 source = return_object->string.pointer;
460 if (*source == '*') {
461 source++;
462 new_string->string.length--;
463
464 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
465 "%s: Removed invalid leading asterisk\n",
466 data->pathname));
467 }
468
469 /*
470 * Copy and uppercase the string. From the ACPI specification:
471 *
472 * A valid PNP ID must be of the form "AAA####" where A is an uppercase
473 * letter and # is a hex digit. A valid ACPI ID must be of the form
474 * "ACPI####" where # is a hex digit.
475 */
476 for (dest = new_string->string.pointer; *source; dest++, source++) {
477 *dest = (char)ACPI_TOUPPER(*source);
478 }
479
480 acpi_ut_remove_reference(return_object);
481 *return_object_ptr = new_string;
482 return (AE_OK);
483}
484
485/******************************************************************************
486 *
487 * FUNCTION: acpi_ns_repair_TSS
488 *
489 * PARAMETERS: Data - Pointer to validation data structure
490 * return_object_ptr - Pointer to the object returned from the
491 * evaluation of a method or object
492 *
493 * RETURN: Status. AE_OK if object is OK or was repaired successfully
494 *
495 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list
496 * descending by the power dissipation values.
497 *
498 *****************************************************************************/
499
500static acpi_status
501acpi_ns_repair_TSS(struct acpi_predefined_data *data,
502 union acpi_operand_object **return_object_ptr)
503{
504 union acpi_operand_object *return_object = *return_object_ptr;
505 acpi_status status;
506 struct acpi_namespace_node *node;
507
508 /*
509 * We can only sort the _TSS return package if there is no _PSS in the
510 * same scope. This is because if _PSS is present, the ACPI specification
511 * dictates that the _TSS Power Dissipation field is to be ignored, and
512 * therefore some BIOSs leave garbage values in the _TSS Power field(s).
513 * In this case, it is best to just return the _TSS package as-is.
514 * (May, 2011)
515 */
516 status =
517 acpi_ns_get_node(data->node, "^_PSS", ACPI_NS_NO_UPSEARCH, &node);
518 if (ACPI_SUCCESS(status)) {
519 return (AE_OK);
520 }
521
522 status = acpi_ns_check_sorted_list(data, return_object, 5, 1,
523 ACPI_SORT_DESCENDING,
524 "PowerDissipation");
525
526 return (status);
527}
528
529/******************************************************************************
530 *
531 * FUNCTION: acpi_ns_repair_PSS
532 *
533 * PARAMETERS: Data - Pointer to validation data structure
534 * return_object_ptr - Pointer to the object returned from the
535 * evaluation of a method or object
536 *
537 * RETURN: Status. AE_OK if object is OK or was repaired successfully
538 *
539 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list
540 * by the CPU frequencies. Check that the power dissipation values
541 * are all proportional to CPU frequency (i.e., sorting by
542 * frequency should be the same as sorting by power.)
543 *
544 *****************************************************************************/
545
546static acpi_status
547acpi_ns_repair_PSS(struct acpi_predefined_data *data,
548 union acpi_operand_object **return_object_ptr)
549{
550 union acpi_operand_object *return_object = *return_object_ptr;
551 union acpi_operand_object **outer_elements;
552 u32 outer_element_count;
553 union acpi_operand_object **elements;
554 union acpi_operand_object *obj_desc;
555 u32 previous_value;
556 acpi_status status;
557 u32 i;
558
559 /*
560 * Entries (sub-packages) in the _PSS Package must be sorted by power
561 * dissipation, in descending order. If it appears that the list is
562 * incorrectly sorted, sort it. We sort by cpu_frequency, since this
563 * should be proportional to the power.
564 */
565 status = acpi_ns_check_sorted_list(data, return_object, 6, 0,
566 ACPI_SORT_DESCENDING,
567 "CpuFrequency");
568 if (ACPI_FAILURE(status)) {
569 return (status);
570 }
571
572 /*
573 * We now know the list is correctly sorted by CPU frequency. Check if
574 * the power dissipation values are proportional.
575 */
576 previous_value = ACPI_UINT32_MAX;
577 outer_elements = return_object->package.elements;
578 outer_element_count = return_object->package.count;
579
580 for (i = 0; i < outer_element_count; i++) {
581 elements = (*outer_elements)->package.elements;
582 obj_desc = elements[1]; /* Index1 = power_dissipation */
583
584 if ((u32) obj_desc->integer.value > previous_value) {
585 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
586 data->node_flags,
587 "SubPackage[%u,%u] - suspicious power dissipation values",
588 i - 1, i));
589 }
590
591 previous_value = (u32) obj_desc->integer.value;
592 outer_elements++;
593 }
594
595 return (AE_OK);
596}
597
598/******************************************************************************
599 *
600 * FUNCTION: acpi_ns_check_sorted_list
601 *
602 * PARAMETERS: Data - Pointer to validation data structure
603 * return_object - Pointer to the top-level returned object
604 * expected_count - Minimum length of each sub-package
605 * sort_index - Sub-package entry to sort on
606 * sort_direction - Ascending or descending
607 * sort_key_name - Name of the sort_index field
608 *
609 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or
610 * has been repaired by sorting the list.
611 *
612 * DESCRIPTION: Check if the package list is valid and sorted correctly by the
613 * sort_index. If not, then sort the list.
614 *
615 *****************************************************************************/
616
617static acpi_status
618acpi_ns_check_sorted_list(struct acpi_predefined_data *data,
619 union acpi_operand_object *return_object,
620 u32 expected_count,
621 u32 sort_index,
622 u8 sort_direction, char *sort_key_name)
623{
624 u32 outer_element_count;
625 union acpi_operand_object **outer_elements;
626 union acpi_operand_object **elements;
627 union acpi_operand_object *obj_desc;
628 u32 i;
629 u32 previous_value;
630
631 ACPI_FUNCTION_NAME(ns_check_sorted_list);
632
633 /* The top-level object must be a package */
634
635 if (return_object->common.type != ACPI_TYPE_PACKAGE) {
636 return (AE_AML_OPERAND_TYPE);
637 }
638
639 /*
640 * NOTE: assumes list of sub-packages contains no NULL elements.
641 * Any NULL elements should have been removed by earlier call
642 * to acpi_ns_remove_null_elements.
643 */
644 outer_elements = return_object->package.elements;
645 outer_element_count = return_object->package.count;
646 if (!outer_element_count) {
647 return (AE_AML_PACKAGE_LIMIT);
648 }
649
650 previous_value = 0;
651 if (sort_direction == ACPI_SORT_DESCENDING) {
652 previous_value = ACPI_UINT32_MAX;
653 }
654
655 /* Examine each subpackage */
656
657 for (i = 0; i < outer_element_count; i++) {
658
659 /* Each element of the top-level package must also be a package */
660
661 if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) {
662 return (AE_AML_OPERAND_TYPE);
663 }
664
665 /* Each sub-package must have the minimum length */
666
667 if ((*outer_elements)->package.count < expected_count) {
668 return (AE_AML_PACKAGE_LIMIT);
669 }
670
671 elements = (*outer_elements)->package.elements;
672 obj_desc = elements[sort_index];
673
674 if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
675 return (AE_AML_OPERAND_TYPE);
676 }
677
678 /*
679 * The list must be sorted in the specified order. If we detect a
680 * discrepancy, sort the entire list.
681 */
682 if (((sort_direction == ACPI_SORT_ASCENDING) &&
683 (obj_desc->integer.value < previous_value)) ||
684 ((sort_direction == ACPI_SORT_DESCENDING) &&
685 (obj_desc->integer.value > previous_value))) {
686 acpi_ns_sort_list(return_object->package.elements,
687 outer_element_count, sort_index,
688 sort_direction);
689
690 data->flags |= ACPI_OBJECT_REPAIRED;
691
692 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
693 "%s: Repaired unsorted list - now sorted by %s\n",
694 data->pathname, sort_key_name));
695 return (AE_OK);
696 }
697
698 previous_value = (u32) obj_desc->integer.value;
699 outer_elements++;
700 }
701
702 return (AE_OK);
703}
704
705/******************************************************************************
706 *
707 * FUNCTION: acpi_ns_sort_list
708 *
709 * PARAMETERS: Elements - Package object element list
710 * Count - Element count for above
711 * Index - Sort by which package element
712 * sort_direction - Ascending or Descending sort
713 *
714 * RETURN: None
715 *
716 * DESCRIPTION: Sort the objects that are in a package element list.
717 *
718 * NOTE: Assumes that all NULL elements have been removed from the package,
719 * and that all elements have been verified to be of type Integer.
720 *
721 *****************************************************************************/
722
723static void
724acpi_ns_sort_list(union acpi_operand_object **elements,
725 u32 count, u32 index, u8 sort_direction)
726{
727 union acpi_operand_object *obj_desc1;
728 union acpi_operand_object *obj_desc2;
729 union acpi_operand_object *temp_obj;
730 u32 i;
731 u32 j;
732
733 /* Simple bubble sort */
734
735 for (i = 1; i < count; i++) {
736 for (j = (count - 1); j >= i; j--) {
737 obj_desc1 = elements[j - 1]->package.elements[index];
738 obj_desc2 = elements[j]->package.elements[index];
739
740 if (((sort_direction == ACPI_SORT_ASCENDING) &&
741 (obj_desc1->integer.value >
742 obj_desc2->integer.value))
743 || ((sort_direction == ACPI_SORT_DESCENDING)
744 && (obj_desc1->integer.value <
745 obj_desc2->integer.value))) {
746 temp_obj = elements[j - 1];
747 elements[j - 1] = elements[j];
748 elements[j] = temp_obj;
749 }
750 }
751 }
752}
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: nsrepair2 - Repair for objects returned by specific
5 * predefined methods
6 *
7 * Copyright (C) 2000 - 2020, Intel Corp.
8 *
9 *****************************************************************************/
10
11#include <acpi/acpi.h>
12#include "accommon.h"
13#include "acnamesp.h"
14
15#define _COMPONENT ACPI_NAMESPACE
16ACPI_MODULE_NAME("nsrepair2")
17
18/*
19 * Information structure and handler for ACPI predefined names that can
20 * be repaired on a per-name basis.
21 */
22typedef
23acpi_status (*acpi_repair_function) (struct acpi_evaluate_info * info,
24 union acpi_operand_object **
25 return_object_ptr);
26
27typedef struct acpi_repair_info {
28 char name[ACPI_NAMESEG_SIZE];
29 acpi_repair_function repair_function;
30
31} acpi_repair_info;
32
33/* Local prototypes */
34
35static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct
36 acpi_namespace_node
37 *node);
38
39static acpi_status
40acpi_ns_repair_ALR(struct acpi_evaluate_info *info,
41 union acpi_operand_object **return_object_ptr);
42
43static acpi_status
44acpi_ns_repair_CID(struct acpi_evaluate_info *info,
45 union acpi_operand_object **return_object_ptr);
46
47static acpi_status
48acpi_ns_repair_CST(struct acpi_evaluate_info *info,
49 union acpi_operand_object **return_object_ptr);
50
51static acpi_status
52acpi_ns_repair_FDE(struct acpi_evaluate_info *info,
53 union acpi_operand_object **return_object_ptr);
54
55static acpi_status
56acpi_ns_repair_HID(struct acpi_evaluate_info *info,
57 union acpi_operand_object **return_object_ptr);
58
59static acpi_status
60acpi_ns_repair_PRT(struct acpi_evaluate_info *info,
61 union acpi_operand_object **return_object_ptr);
62
63static acpi_status
64acpi_ns_repair_PSS(struct acpi_evaluate_info *info,
65 union acpi_operand_object **return_object_ptr);
66
67static acpi_status
68acpi_ns_repair_TSS(struct acpi_evaluate_info *info,
69 union acpi_operand_object **return_object_ptr);
70
71static acpi_status
72acpi_ns_check_sorted_list(struct acpi_evaluate_info *info,
73 union acpi_operand_object *return_object,
74 u32 start_index,
75 u32 expected_count,
76 u32 sort_index,
77 u8 sort_direction, char *sort_key_name);
78
79/* Values for sort_direction above */
80
81#define ACPI_SORT_ASCENDING 0
82#define ACPI_SORT_DESCENDING 1
83
84static void
85acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index);
86
87static void
88acpi_ns_sort_list(union acpi_operand_object **elements,
89 u32 count, u32 index, u8 sort_direction);
90
91/*
92 * This table contains the names of the predefined methods for which we can
93 * perform more complex repairs.
94 *
95 * As necessary:
96 *
97 * _ALR: Sort the list ascending by ambient_illuminance
98 * _CID: Strings: uppercase all, remove any leading asterisk
99 * _CST: Sort the list ascending by C state type
100 * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs
101 * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs
102 * _HID: Strings: uppercase all, remove any leading asterisk
103 * _PRT: Fix reversed source_name and source_index
104 * _PSS: Sort the list descending by Power
105 * _TSS: Sort the list descending by Power
106 *
107 * Names that must be packages, but cannot be sorted:
108 *
109 * _BCL: Values are tied to the Package index where they appear, and cannot
110 * be moved or sorted. These index values are used for _BQC and _BCM.
111 * However, we can fix the case where a buffer is returned, by converting
112 * it to a Package of integers.
113 */
114static const struct acpi_repair_info acpi_ns_repairable_names[] = {
115 {"_ALR", acpi_ns_repair_ALR},
116 {"_CID", acpi_ns_repair_CID},
117 {"_CST", acpi_ns_repair_CST},
118 {"_FDE", acpi_ns_repair_FDE},
119 {"_GTM", acpi_ns_repair_FDE}, /* _GTM has same repair as _FDE */
120 {"_HID", acpi_ns_repair_HID},
121 {"_PRT", acpi_ns_repair_PRT},
122 {"_PSS", acpi_ns_repair_PSS},
123 {"_TSS", acpi_ns_repair_TSS},
124 {{0, 0, 0, 0}, NULL} /* Table terminator */
125};
126
127#define ACPI_FDE_FIELD_COUNT 5
128#define ACPI_FDE_BYTE_BUFFER_SIZE 5
129#define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * (u32) sizeof (u32))
130
131/******************************************************************************
132 *
133 * FUNCTION: acpi_ns_complex_repairs
134 *
135 * PARAMETERS: info - Method execution information block
136 * node - Namespace node for the method/object
137 * validate_status - Original status of earlier validation
138 * return_object_ptr - Pointer to the object returned from the
139 * evaluation of a method or object
140 *
141 * RETURN: Status. AE_OK if repair was successful. If name is not
142 * matched, validate_status is returned.
143 *
144 * DESCRIPTION: Attempt to repair/convert a return object of a type that was
145 * not expected.
146 *
147 *****************************************************************************/
148
149acpi_status
150acpi_ns_complex_repairs(struct acpi_evaluate_info *info,
151 struct acpi_namespace_node *node,
152 acpi_status validate_status,
153 union acpi_operand_object **return_object_ptr)
154{
155 const struct acpi_repair_info *predefined;
156 acpi_status status;
157
158 /* Check if this name is in the list of repairable names */
159
160 predefined = acpi_ns_match_complex_repair(node);
161 if (!predefined) {
162 return (validate_status);
163 }
164
165 status = predefined->repair_function(info, return_object_ptr);
166 return (status);
167}
168
169/******************************************************************************
170 *
171 * FUNCTION: acpi_ns_match_complex_repair
172 *
173 * PARAMETERS: node - Namespace node for the method/object
174 *
175 * RETURN: Pointer to entry in repair table. NULL indicates not found.
176 *
177 * DESCRIPTION: Check an object name against the repairable object list.
178 *
179 *****************************************************************************/
180
181static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct
182 acpi_namespace_node
183 *node)
184{
185 const struct acpi_repair_info *this_name;
186
187 /* Search info table for a repairable predefined method/object name */
188
189 this_name = acpi_ns_repairable_names;
190 while (this_name->repair_function) {
191 if (ACPI_COMPARE_NAMESEG(node->name.ascii, this_name->name)) {
192 return (this_name);
193 }
194
195 this_name++;
196 }
197
198 return (NULL); /* Not found */
199}
200
201/******************************************************************************
202 *
203 * FUNCTION: acpi_ns_repair_ALR
204 *
205 * PARAMETERS: info - Method execution information block
206 * return_object_ptr - Pointer to the object returned from the
207 * evaluation of a method or object
208 *
209 * RETURN: Status. AE_OK if object is OK or was repaired successfully
210 *
211 * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list
212 * ascending by the ambient illuminance values.
213 *
214 *****************************************************************************/
215
216static acpi_status
217acpi_ns_repair_ALR(struct acpi_evaluate_info *info,
218 union acpi_operand_object **return_object_ptr)
219{
220 union acpi_operand_object *return_object = *return_object_ptr;
221 acpi_status status;
222
223 status = acpi_ns_check_sorted_list(info, return_object, 0, 2, 1,
224 ACPI_SORT_ASCENDING,
225 "AmbientIlluminance");
226
227 return (status);
228}
229
230/******************************************************************************
231 *
232 * FUNCTION: acpi_ns_repair_FDE
233 *
234 * PARAMETERS: info - Method execution information block
235 * return_object_ptr - Pointer to the object returned from the
236 * evaluation of a method or object
237 *
238 * RETURN: Status. AE_OK if object is OK or was repaired successfully
239 *
240 * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return
241 * value is a Buffer of 5 DWORDs. This function repairs a common
242 * problem where the return value is a Buffer of BYTEs, not
243 * DWORDs.
244 *
245 *****************************************************************************/
246
247static acpi_status
248acpi_ns_repair_FDE(struct acpi_evaluate_info *info,
249 union acpi_operand_object **return_object_ptr)
250{
251 union acpi_operand_object *return_object = *return_object_ptr;
252 union acpi_operand_object *buffer_object;
253 u8 *byte_buffer;
254 u32 *dword_buffer;
255 u32 i;
256
257 ACPI_FUNCTION_NAME(ns_repair_FDE);
258
259 switch (return_object->common.type) {
260 case ACPI_TYPE_BUFFER:
261
262 /* This is the expected type. Length should be (at least) 5 DWORDs */
263
264 if (return_object->buffer.length >= ACPI_FDE_DWORD_BUFFER_SIZE) {
265 return (AE_OK);
266 }
267
268 /* We can only repair if we have exactly 5 BYTEs */
269
270 if (return_object->buffer.length != ACPI_FDE_BYTE_BUFFER_SIZE) {
271 ACPI_WARN_PREDEFINED((AE_INFO,
272 info->full_pathname,
273 info->node_flags,
274 "Incorrect return buffer length %u, expected %u",
275 return_object->buffer.length,
276 ACPI_FDE_DWORD_BUFFER_SIZE));
277
278 return (AE_AML_OPERAND_TYPE);
279 }
280
281 /* Create the new (larger) buffer object */
282
283 buffer_object =
284 acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE);
285 if (!buffer_object) {
286 return (AE_NO_MEMORY);
287 }
288
289 /* Expand each byte to a DWORD */
290
291 byte_buffer = return_object->buffer.pointer;
292 dword_buffer = ACPI_CAST_PTR(u32,
293 buffer_object->buffer.pointer);
294
295 for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) {
296 *dword_buffer = (u32) *byte_buffer;
297 dword_buffer++;
298 byte_buffer++;
299 }
300
301 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
302 "%s Expanded Byte Buffer to expected DWord Buffer\n",
303 info->full_pathname));
304 break;
305
306 default:
307
308 return (AE_AML_OPERAND_TYPE);
309 }
310
311 /* Delete the original return object, return the new buffer object */
312
313 acpi_ut_remove_reference(return_object);
314 *return_object_ptr = buffer_object;
315
316 info->return_flags |= ACPI_OBJECT_REPAIRED;
317 return (AE_OK);
318}
319
320/******************************************************************************
321 *
322 * FUNCTION: acpi_ns_repair_CID
323 *
324 * PARAMETERS: info - Method execution information block
325 * return_object_ptr - Pointer to the object returned from the
326 * evaluation of a method or object
327 *
328 * RETURN: Status. AE_OK if object is OK or was repaired successfully
329 *
330 * DESCRIPTION: Repair for the _CID object. If a string, ensure that all
331 * letters are uppercase and that there is no leading asterisk.
332 * If a Package, ensure same for all string elements.
333 *
334 *****************************************************************************/
335
336static acpi_status
337acpi_ns_repair_CID(struct acpi_evaluate_info *info,
338 union acpi_operand_object **return_object_ptr)
339{
340 acpi_status status;
341 union acpi_operand_object *return_object = *return_object_ptr;
342 union acpi_operand_object **element_ptr;
343 union acpi_operand_object *original_element;
344 u16 original_ref_count;
345 u32 i;
346
347 /* Check for _CID as a simple string */
348
349 if (return_object->common.type == ACPI_TYPE_STRING) {
350 status = acpi_ns_repair_HID(info, return_object_ptr);
351 return (status);
352 }
353
354 /* Exit if not a Package */
355
356 if (return_object->common.type != ACPI_TYPE_PACKAGE) {
357 return (AE_OK);
358 }
359
360 /* Examine each element of the _CID package */
361
362 element_ptr = return_object->package.elements;
363 for (i = 0; i < return_object->package.count; i++) {
364 original_element = *element_ptr;
365 original_ref_count = original_element->common.reference_count;
366
367 status = acpi_ns_repair_HID(info, element_ptr);
368 if (ACPI_FAILURE(status)) {
369 return (status);
370 }
371
372 if (original_element != *element_ptr) {
373
374 /* Update reference count of new object */
375
376 (*element_ptr)->common.reference_count =
377 original_ref_count;
378 }
379
380 element_ptr++;
381 }
382
383 return (AE_OK);
384}
385
386/******************************************************************************
387 *
388 * FUNCTION: acpi_ns_repair_CST
389 *
390 * PARAMETERS: info - Method execution information block
391 * return_object_ptr - Pointer to the object returned from the
392 * evaluation of a method or object
393 *
394 * RETURN: Status. AE_OK if object is OK or was repaired successfully
395 *
396 * DESCRIPTION: Repair for the _CST object:
397 * 1. Sort the list ascending by C state type
398 * 2. Ensure type cannot be zero
399 * 3. A subpackage count of zero means _CST is meaningless
400 * 4. Count must match the number of C state subpackages
401 *
402 *****************************************************************************/
403
404static acpi_status
405acpi_ns_repair_CST(struct acpi_evaluate_info *info,
406 union acpi_operand_object **return_object_ptr)
407{
408 union acpi_operand_object *return_object = *return_object_ptr;
409 union acpi_operand_object **outer_elements;
410 u32 outer_element_count;
411 union acpi_operand_object *obj_desc;
412 acpi_status status;
413 u8 removing;
414 u32 i;
415
416 ACPI_FUNCTION_NAME(ns_repair_CST);
417
418 /*
419 * Check if the C-state type values are proportional.
420 */
421 outer_element_count = return_object->package.count - 1;
422 i = 0;
423 while (i < outer_element_count) {
424 outer_elements = &return_object->package.elements[i + 1];
425 removing = FALSE;
426
427 if ((*outer_elements)->package.count == 0) {
428 ACPI_WARN_PREDEFINED((AE_INFO,
429 info->full_pathname,
430 info->node_flags,
431 "SubPackage[%u] - removing entry due to zero count",
432 i));
433 removing = TRUE;
434 goto remove_element;
435 }
436
437 obj_desc = (*outer_elements)->package.elements[1]; /* Index1 = Type */
438 if ((u32)obj_desc->integer.value == 0) {
439 ACPI_WARN_PREDEFINED((AE_INFO,
440 info->full_pathname,
441 info->node_flags,
442 "SubPackage[%u] - removing entry due to invalid Type(0)",
443 i));
444 removing = TRUE;
445 }
446
447remove_element:
448 if (removing) {
449 acpi_ns_remove_element(return_object, i + 1);
450 outer_element_count--;
451 } else {
452 i++;
453 }
454 }
455
456 /* Update top-level package count, Type "Integer" checked elsewhere */
457
458 obj_desc = return_object->package.elements[0];
459 obj_desc->integer.value = outer_element_count;
460
461 /*
462 * Entries (subpackages) in the _CST Package must be sorted by the
463 * C-state type, in ascending order.
464 */
465 status = acpi_ns_check_sorted_list(info, return_object, 1, 4, 1,
466 ACPI_SORT_ASCENDING, "C-State Type");
467 if (ACPI_FAILURE(status)) {
468 return (status);
469 }
470
471 return (AE_OK);
472}
473
474/******************************************************************************
475 *
476 * FUNCTION: acpi_ns_repair_HID
477 *
478 * PARAMETERS: info - Method execution information block
479 * return_object_ptr - Pointer to the object returned from the
480 * evaluation of a method or object
481 *
482 * RETURN: Status. AE_OK if object is OK or was repaired successfully
483 *
484 * DESCRIPTION: Repair for the _HID object. If a string, ensure that all
485 * letters are uppercase and that there is no leading asterisk.
486 *
487 *****************************************************************************/
488
489static acpi_status
490acpi_ns_repair_HID(struct acpi_evaluate_info *info,
491 union acpi_operand_object **return_object_ptr)
492{
493 union acpi_operand_object *return_object = *return_object_ptr;
494 union acpi_operand_object *new_string;
495 char *source;
496 char *dest;
497
498 ACPI_FUNCTION_NAME(ns_repair_HID);
499
500 /* We only care about string _HID objects (not integers) */
501
502 if (return_object->common.type != ACPI_TYPE_STRING) {
503 return (AE_OK);
504 }
505
506 if (return_object->string.length == 0) {
507 ACPI_WARN_PREDEFINED((AE_INFO,
508 info->full_pathname, info->node_flags,
509 "Invalid zero-length _HID or _CID string"));
510
511 /* Return AE_OK anyway, let driver handle it */
512
513 info->return_flags |= ACPI_OBJECT_REPAIRED;
514 return (AE_OK);
515 }
516
517 /* It is simplest to always create a new string object */
518
519 new_string = acpi_ut_create_string_object(return_object->string.length);
520 if (!new_string) {
521 return (AE_NO_MEMORY);
522 }
523
524 /*
525 * Remove a leading asterisk if present. For some unknown reason, there
526 * are many machines in the field that contains IDs like this.
527 *
528 * Examples: "*PNP0C03", "*ACPI0003"
529 */
530 source = return_object->string.pointer;
531 if (*source == '*') {
532 source++;
533 new_string->string.length--;
534
535 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
536 "%s: Removed invalid leading asterisk\n",
537 info->full_pathname));
538 }
539
540 /*
541 * Copy and uppercase the string. From the ACPI 5.0 specification:
542 *
543 * A valid PNP ID must be of the form "AAA####" where A is an uppercase
544 * letter and # is a hex digit. A valid ACPI ID must be of the form
545 * "NNNN####" where N is an uppercase letter or decimal digit, and
546 * # is a hex digit.
547 */
548 for (dest = new_string->string.pointer; *source; dest++, source++) {
549 *dest = (char)toupper((int)*source);
550 }
551
552 acpi_ut_remove_reference(return_object);
553 *return_object_ptr = new_string;
554 return (AE_OK);
555}
556
557/******************************************************************************
558 *
559 * FUNCTION: acpi_ns_repair_PRT
560 *
561 * PARAMETERS: info - Method execution information block
562 * return_object_ptr - Pointer to the object returned from the
563 * evaluation of a method or object
564 *
565 * RETURN: Status. AE_OK if object is OK or was repaired successfully
566 *
567 * DESCRIPTION: Repair for the _PRT object. If necessary, fix reversed
568 * source_name and source_index field, a common BIOS bug.
569 *
570 *****************************************************************************/
571
572static acpi_status
573acpi_ns_repair_PRT(struct acpi_evaluate_info *info,
574 union acpi_operand_object **return_object_ptr)
575{
576 union acpi_operand_object *package_object = *return_object_ptr;
577 union acpi_operand_object **top_object_list;
578 union acpi_operand_object **sub_object_list;
579 union acpi_operand_object *obj_desc;
580 union acpi_operand_object *sub_package;
581 u32 element_count;
582 u32 index;
583
584 /* Each element in the _PRT package is a subpackage */
585
586 top_object_list = package_object->package.elements;
587 element_count = package_object->package.count;
588
589 /* Examine each subpackage */
590
591 for (index = 0; index < element_count; index++, top_object_list++) {
592 sub_package = *top_object_list;
593 sub_object_list = sub_package->package.elements;
594
595 /* Check for minimum required element count */
596
597 if (sub_package->package.count < 4) {
598 continue;
599 }
600
601 /*
602 * If the BIOS has erroneously reversed the _PRT source_name (index 2)
603 * and the source_index (index 3), fix it. _PRT is important enough to
604 * workaround this BIOS error. This also provides compatibility with
605 * other ACPI implementations.
606 */
607 obj_desc = sub_object_list[3];
608 if (!obj_desc || (obj_desc->common.type != ACPI_TYPE_INTEGER)) {
609 sub_object_list[3] = sub_object_list[2];
610 sub_object_list[2] = obj_desc;
611 info->return_flags |= ACPI_OBJECT_REPAIRED;
612
613 ACPI_WARN_PREDEFINED((AE_INFO,
614 info->full_pathname,
615 info->node_flags,
616 "PRT[%X]: Fixed reversed SourceName and SourceIndex",
617 index));
618 }
619 }
620
621 return (AE_OK);
622}
623
624/******************************************************************************
625 *
626 * FUNCTION: acpi_ns_repair_PSS
627 *
628 * PARAMETERS: info - Method execution information block
629 * return_object_ptr - Pointer to the object returned from the
630 * evaluation of a method or object
631 *
632 * RETURN: Status. AE_OK if object is OK or was repaired successfully
633 *
634 * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list
635 * by the CPU frequencies. Check that the power dissipation values
636 * are all proportional to CPU frequency (i.e., sorting by
637 * frequency should be the same as sorting by power.)
638 *
639 *****************************************************************************/
640
641static acpi_status
642acpi_ns_repair_PSS(struct acpi_evaluate_info *info,
643 union acpi_operand_object **return_object_ptr)
644{
645 union acpi_operand_object *return_object = *return_object_ptr;
646 union acpi_operand_object **outer_elements;
647 u32 outer_element_count;
648 union acpi_operand_object **elements;
649 union acpi_operand_object *obj_desc;
650 u32 previous_value;
651 acpi_status status;
652 u32 i;
653
654 /*
655 * Entries (subpackages) in the _PSS Package must be sorted by power
656 * dissipation, in descending order. If it appears that the list is
657 * incorrectly sorted, sort it. We sort by cpu_frequency, since this
658 * should be proportional to the power.
659 */
660 status = acpi_ns_check_sorted_list(info, return_object, 0, 6, 0,
661 ACPI_SORT_DESCENDING,
662 "CpuFrequency");
663 if (ACPI_FAILURE(status)) {
664 return (status);
665 }
666
667 /*
668 * We now know the list is correctly sorted by CPU frequency. Check if
669 * the power dissipation values are proportional.
670 */
671 previous_value = ACPI_UINT32_MAX;
672 outer_elements = return_object->package.elements;
673 outer_element_count = return_object->package.count;
674
675 for (i = 0; i < outer_element_count; i++) {
676 elements = (*outer_elements)->package.elements;
677 obj_desc = elements[1]; /* Index1 = power_dissipation */
678
679 if ((u32)obj_desc->integer.value > previous_value) {
680 ACPI_WARN_PREDEFINED((AE_INFO,
681 info->full_pathname,
682 info->node_flags,
683 "SubPackage[%u,%u] - suspicious power dissipation values",
684 i - 1, i));
685 }
686
687 previous_value = (u32) obj_desc->integer.value;
688 outer_elements++;
689 }
690
691 return (AE_OK);
692}
693
694/******************************************************************************
695 *
696 * FUNCTION: acpi_ns_repair_TSS
697 *
698 * PARAMETERS: info - Method execution information block
699 * return_object_ptr - Pointer to the object returned from the
700 * evaluation of a method or object
701 *
702 * RETURN: Status. AE_OK if object is OK or was repaired successfully
703 *
704 * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list
705 * descending by the power dissipation values.
706 *
707 *****************************************************************************/
708
709static acpi_status
710acpi_ns_repair_TSS(struct acpi_evaluate_info *info,
711 union acpi_operand_object **return_object_ptr)
712{
713 union acpi_operand_object *return_object = *return_object_ptr;
714 acpi_status status;
715 struct acpi_namespace_node *node;
716
717 /*
718 * We can only sort the _TSS return package if there is no _PSS in the
719 * same scope. This is because if _PSS is present, the ACPI specification
720 * dictates that the _TSS Power Dissipation field is to be ignored, and
721 * therefore some BIOSs leave garbage values in the _TSS Power field(s).
722 * In this case, it is best to just return the _TSS package as-is.
723 * (May, 2011)
724 */
725 status = acpi_ns_get_node(info->node, "^_PSS",
726 ACPI_NS_NO_UPSEARCH, &node);
727 if (ACPI_SUCCESS(status)) {
728 return (AE_OK);
729 }
730
731 status = acpi_ns_check_sorted_list(info, return_object, 0, 5, 1,
732 ACPI_SORT_DESCENDING,
733 "PowerDissipation");
734
735 return (status);
736}
737
738/******************************************************************************
739 *
740 * FUNCTION: acpi_ns_check_sorted_list
741 *
742 * PARAMETERS: info - Method execution information block
743 * return_object - Pointer to the top-level returned object
744 * start_index - Index of the first subpackage
745 * expected_count - Minimum length of each subpackage
746 * sort_index - Subpackage entry to sort on
747 * sort_direction - Ascending or descending
748 * sort_key_name - Name of the sort_index field
749 *
750 * RETURN: Status. AE_OK if the list is valid and is sorted correctly or
751 * has been repaired by sorting the list.
752 *
753 * DESCRIPTION: Check if the package list is valid and sorted correctly by the
754 * sort_index. If not, then sort the list.
755 *
756 *****************************************************************************/
757
758static acpi_status
759acpi_ns_check_sorted_list(struct acpi_evaluate_info *info,
760 union acpi_operand_object *return_object,
761 u32 start_index,
762 u32 expected_count,
763 u32 sort_index,
764 u8 sort_direction, char *sort_key_name)
765{
766 u32 outer_element_count;
767 union acpi_operand_object **outer_elements;
768 union acpi_operand_object **elements;
769 union acpi_operand_object *obj_desc;
770 u32 i;
771 u32 previous_value;
772
773 ACPI_FUNCTION_NAME(ns_check_sorted_list);
774
775 /* The top-level object must be a package */
776
777 if (return_object->common.type != ACPI_TYPE_PACKAGE) {
778 return (AE_AML_OPERAND_TYPE);
779 }
780
781 /*
782 * NOTE: assumes list of subpackages contains no NULL elements.
783 * Any NULL elements should have been removed by earlier call
784 * to acpi_ns_remove_null_elements.
785 */
786 outer_element_count = return_object->package.count;
787 if (!outer_element_count || start_index >= outer_element_count) {
788 return (AE_AML_PACKAGE_LIMIT);
789 }
790
791 outer_elements = &return_object->package.elements[start_index];
792 outer_element_count -= start_index;
793
794 previous_value = 0;
795 if (sort_direction == ACPI_SORT_DESCENDING) {
796 previous_value = ACPI_UINT32_MAX;
797 }
798
799 /* Examine each subpackage */
800
801 for (i = 0; i < outer_element_count; i++) {
802
803 /* Each element of the top-level package must also be a package */
804
805 if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) {
806 return (AE_AML_OPERAND_TYPE);
807 }
808
809 /* Each subpackage must have the minimum length */
810
811 if ((*outer_elements)->package.count < expected_count) {
812 return (AE_AML_PACKAGE_LIMIT);
813 }
814
815 elements = (*outer_elements)->package.elements;
816 obj_desc = elements[sort_index];
817
818 if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
819 return (AE_AML_OPERAND_TYPE);
820 }
821
822 /*
823 * The list must be sorted in the specified order. If we detect a
824 * discrepancy, sort the entire list.
825 */
826 if (((sort_direction == ACPI_SORT_ASCENDING) &&
827 (obj_desc->integer.value < previous_value)) ||
828 ((sort_direction == ACPI_SORT_DESCENDING) &&
829 (obj_desc->integer.value > previous_value))) {
830 acpi_ns_sort_list(&return_object->package.
831 elements[start_index],
832 outer_element_count, sort_index,
833 sort_direction);
834
835 info->return_flags |= ACPI_OBJECT_REPAIRED;
836
837 ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
838 "%s: Repaired unsorted list - now sorted by %s\n",
839 info->full_pathname, sort_key_name));
840 return (AE_OK);
841 }
842
843 previous_value = (u32) obj_desc->integer.value;
844 outer_elements++;
845 }
846
847 return (AE_OK);
848}
849
850/******************************************************************************
851 *
852 * FUNCTION: acpi_ns_sort_list
853 *
854 * PARAMETERS: elements - Package object element list
855 * count - Element count for above
856 * index - Sort by which package element
857 * sort_direction - Ascending or Descending sort
858 *
859 * RETURN: None
860 *
861 * DESCRIPTION: Sort the objects that are in a package element list.
862 *
863 * NOTE: Assumes that all NULL elements have been removed from the package,
864 * and that all elements have been verified to be of type Integer.
865 *
866 *****************************************************************************/
867
868static void
869acpi_ns_sort_list(union acpi_operand_object **elements,
870 u32 count, u32 index, u8 sort_direction)
871{
872 union acpi_operand_object *obj_desc1;
873 union acpi_operand_object *obj_desc2;
874 union acpi_operand_object *temp_obj;
875 u32 i;
876 u32 j;
877
878 /* Simple bubble sort */
879
880 for (i = 1; i < count; i++) {
881 for (j = (count - 1); j >= i; j--) {
882 obj_desc1 = elements[j - 1]->package.elements[index];
883 obj_desc2 = elements[j]->package.elements[index];
884
885 if (((sort_direction == ACPI_SORT_ASCENDING) &&
886 (obj_desc1->integer.value >
887 obj_desc2->integer.value))
888 || ((sort_direction == ACPI_SORT_DESCENDING)
889 && (obj_desc1->integer.value <
890 obj_desc2->integer.value))) {
891 temp_obj = elements[j - 1];
892 elements[j - 1] = elements[j];
893 elements[j] = temp_obj;
894 }
895 }
896 }
897}
898
899/******************************************************************************
900 *
901 * FUNCTION: acpi_ns_remove_element
902 *
903 * PARAMETERS: obj_desc - Package object element list
904 * index - Index of element to remove
905 *
906 * RETURN: None
907 *
908 * DESCRIPTION: Remove the requested element of a package and delete it.
909 *
910 *****************************************************************************/
911
912static void
913acpi_ns_remove_element(union acpi_operand_object *obj_desc, u32 index)
914{
915 union acpi_operand_object **source;
916 union acpi_operand_object **dest;
917 u32 count;
918 u32 new_count;
919 u32 i;
920
921 ACPI_FUNCTION_NAME(ns_remove_element);
922
923 count = obj_desc->package.count;
924 new_count = count - 1;
925
926 source = obj_desc->package.elements;
927 dest = source;
928
929 /* Examine all elements of the package object, remove matched index */
930
931 for (i = 0; i < count; i++) {
932 if (i == index) {
933 acpi_ut_remove_reference(*source); /* Remove one ref for being in pkg */
934 acpi_ut_remove_reference(*source);
935 } else {
936 *dest = *source;
937 dest++;
938 }
939
940 source++;
941 }
942
943 /* NULL terminate list and update the package count */
944
945 *dest = NULL;
946 obj_desc->package.count = new_count;
947}