xref: /freebsd/sys/contrib/dev/acpica/components/namespace/nsrepair2.c (revision d485c77f203fb0f4cdc08dea5ff81631b51d8809)
1 /******************************************************************************
2  *
3  * Module Name: nsrepair2 - Repair for objects returned by specific
4  *                          predefined methods
5  *
6  *****************************************************************************/
7 
8 /******************************************************************************
9  *
10  * 1. Copyright Notice
11  *
12  * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp.
13  * All rights reserved.
14  *
15  * 2. License
16  *
17  * 2.1. This is your license from Intel Corp. under its intellectual property
18  * rights. You may have additional license terms from the party that provided
19  * you this software, covering your right to use that party's intellectual
20  * property rights.
21  *
22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23  * copy of the source code appearing in this file ("Covered Code") an
24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25  * base code distributed originally by Intel ("Original Intel Code") to copy,
26  * make derivatives, distribute, use and display any portion of the Covered
27  * Code in any form, with the right to sublicense such rights; and
28  *
29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30  * license (with the right to sublicense), under only those claims of Intel
31  * patents that are infringed by the Original Intel Code, to make, use, sell,
32  * offer to sell, and import the Covered Code and derivative works thereof
33  * solely to the minimum extent necessary to exercise the above copyright
34  * license, and in no event shall the patent license extend to any additions
35  * to or modifications of the Original Intel Code. No other license or right
36  * is granted directly or by implication, estoppel or otherwise;
37  *
38  * The above copyright and patent license is granted only if the following
39  * conditions are met:
40  *
41  * 3. Conditions
42  *
43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44  * Redistribution of source code of any substantial portion of the Covered
45  * Code or modification with rights to further distribute source must include
46  * the above Copyright Notice, the above License, this list of Conditions,
47  * and the following Disclaimer and Export Compliance provision. In addition,
48  * Licensee must cause all Covered Code to which Licensee contributes to
49  * contain a file documenting the changes Licensee made to create that Covered
50  * Code and the date of any change. Licensee must include in that file the
51  * documentation of any changes made by any predecessor Licensee. Licensee
52  * must include a prominent statement that the modification is derived,
53  * directly or indirectly, from Original Intel Code.
54  *
55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56  * Redistribution of source code of any substantial portion of the Covered
57  * Code or modification without rights to further distribute source must
58  * include the following Disclaimer and Export Compliance provision in the
59  * documentation and/or other materials provided with distribution. In
60  * addition, Licensee may not authorize further sublicense of source of any
61  * portion of the Covered Code, and must include terms to the effect that the
62  * license from Licensee to its licensee is limited to the intellectual
63  * property embodied in the software Licensee provides to its licensee, and
64  * not to intellectual property embodied in modifications its licensee may
65  * make.
66  *
67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
68  * substantial portion of the Covered Code or modification must reproduce the
69  * above Copyright Notice, and the following Disclaimer and Export Compliance
70  * provision in the documentation and/or other materials provided with the
71  * distribution.
72  *
73  * 3.4. Intel retains all right, title, and interest in and to the Original
74  * Intel Code.
75  *
76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77  * Intel shall be used in advertising or otherwise to promote the sale, use or
78  * other dealings in products derived from or relating to the Covered Code
79  * without prior written authorization from Intel.
80  *
81  * 4. Disclaimer and Export Compliance
82  *
83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89  * PARTICULAR PURPOSE.
90  *
91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98  * LIMITED REMEDY.
99  *
100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
101  * software or system incorporating such software without first obtaining any
102  * required license or other approval from the U. S. Department of Commerce or
103  * any other agency or department of the United States Government. In the
104  * event Licensee exports any such software from the United States or
105  * re-exports any such software from a foreign destination, Licensee shall
106  * ensure that the distribution and export/re-export of the software is in
107  * compliance with all laws, regulations, orders, or other restrictions of the
108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109  * any of its subsidiaries will export/re-export any technical data, process,
110  * software, or service, directly or indirectly, to any country for which the
111  * United States government or any agency thereof requires an export license,
112  * other governmental approval, or letter of assurance, without first obtaining
113  * such license, approval or letter.
114  *
115  *****************************************************************************
116  *
117  * Alternatively, you may choose to be licensed under the terms of the
118  * following license:
119  *
120  * Redistribution and use in source and binary forms, with or without
121  * modification, are permitted provided that the following conditions
122  * are met:
123  * 1. Redistributions of source code must retain the above copyright
124  *    notice, this list of conditions, and the following disclaimer,
125  *    without modification.
126  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
127  *    substantially similar to the "NO WARRANTY" disclaimer below
128  *    ("Disclaimer") and any redistribution must be conditioned upon
129  *    including a substantially similar Disclaimer requirement for further
130  *    binary redistribution.
131  * 3. Neither the names of the above-listed copyright holders nor the names
132  *    of any contributors may be used to endorse or promote products derived
133  *    from this software without specific prior written permission.
134  *
135  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
136  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
137  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
138  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
139  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
140  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
141  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
142  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
143  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
144  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
145  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146  *
147  * Alternatively, you may choose to be licensed under the terms of the
148  * GNU General Public License ("GPL") version 2 as published by the Free
149  * Software Foundation.
150  *
151  *****************************************************************************/
152 
153 #include <contrib/dev/acpica/include/acpi.h>
154 #include <contrib/dev/acpica/include/accommon.h>
155 #include <contrib/dev/acpica/include/acnamesp.h>
156 
157 #define _COMPONENT          ACPI_NAMESPACE
158         ACPI_MODULE_NAME    ("nsrepair2")
159 
160 
161 /*
162  * Information structure and handler for ACPI predefined names that can
163  * be repaired on a per-name basis.
164  */
165 typedef
166 ACPI_STATUS (*ACPI_REPAIR_FUNCTION) (
167     ACPI_EVALUATE_INFO      *Info,
168     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
169 
170 typedef struct acpi_repair_info
171 {
172     char                    Name[ACPI_NAMESEG_SIZE];
173     ACPI_REPAIR_FUNCTION    RepairFunction;
174 
175 } ACPI_REPAIR_INFO;
176 
177 
178 /* Local prototypes */
179 
180 static const ACPI_REPAIR_INFO *
181 AcpiNsMatchComplexRepair (
182     ACPI_NAMESPACE_NODE     *Node);
183 
184 static ACPI_STATUS
185 AcpiNsRepair_ALR (
186     ACPI_EVALUATE_INFO      *Info,
187     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
188 
189 static ACPI_STATUS
190 AcpiNsRepair_CID (
191     ACPI_EVALUATE_INFO      *Info,
192     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
193 
194 static ACPI_STATUS
195 AcpiNsRepair_CST (
196     ACPI_EVALUATE_INFO      *Info,
197     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
198 
199 static ACPI_STATUS
200 AcpiNsRepair_FDE (
201     ACPI_EVALUATE_INFO      *Info,
202     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
203 
204 static ACPI_STATUS
205 AcpiNsRepair_HID (
206     ACPI_EVALUATE_INFO      *Info,
207     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
208 
209 static ACPI_STATUS
210 AcpiNsRepair_PRT (
211     ACPI_EVALUATE_INFO      *Info,
212     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
213 
214 static ACPI_STATUS
215 AcpiNsRepair_PSS (
216     ACPI_EVALUATE_INFO      *Info,
217     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
218 
219 static ACPI_STATUS
220 AcpiNsRepair_TSS (
221     ACPI_EVALUATE_INFO      *Info,
222     ACPI_OPERAND_OBJECT     **ReturnObjectPtr);
223 
224 static ACPI_STATUS
225 AcpiNsCheckSortedList (
226     ACPI_EVALUATE_INFO      *Info,
227     ACPI_OPERAND_OBJECT     *ReturnObject,
228     UINT32                  StartIndex,
229     UINT32                  ExpectedCount,
230     UINT32                  SortIndex,
231     UINT8                   SortDirection,
232     char                    *SortKeyName);
233 
234 /* Values for SortDirection above */
235 
236 #define ACPI_SORT_ASCENDING     0
237 #define ACPI_SORT_DESCENDING    1
238 
239 static void
240 AcpiNsRemoveElement (
241     ACPI_OPERAND_OBJECT     *ObjDesc,
242     UINT32                  Index);
243 
244 static void
245 AcpiNsSortList (
246     ACPI_OPERAND_OBJECT     **Elements,
247     UINT32                  Count,
248     UINT32                  Index,
249     UINT8                   SortDirection);
250 
251 
252 /*
253  * This table contains the names of the predefined methods for which we can
254  * perform more complex repairs.
255  *
256  * As necessary:
257  *
258  * _ALR: Sort the list ascending by AmbientIlluminance
259  * _CID: Strings: uppercase all, remove any leading asterisk
260  * _CST: Sort the list ascending by C state type
261  * _FDE: Convert Buffer of BYTEs to a Buffer of DWORDs
262  * _GTM: Convert Buffer of BYTEs to a Buffer of DWORDs
263  * _HID: Strings: uppercase all, remove any leading asterisk
264  * _PRT: Fix reversed SourceName and SourceIndex
265  * _PSS: Sort the list descending by Power
266  * _TSS: Sort the list descending by Power
267  *
268  * Names that must be packages, but cannot be sorted:
269  *
270  * _BCL: Values are tied to the Package index where they appear, and cannot
271  * be moved or sorted. These index values are used for _BQC and _BCM.
272  * However, we can fix the case where a buffer is returned, by converting
273  * it to a Package of integers.
274  */
275 static const ACPI_REPAIR_INFO       AcpiNsRepairableNames[] =
276 {
277     {"_ALR", AcpiNsRepair_ALR},
278     {"_CID", AcpiNsRepair_CID},
279     {"_CST", AcpiNsRepair_CST},
280     {"_FDE", AcpiNsRepair_FDE},
281     {"_GTM", AcpiNsRepair_FDE},     /* _GTM has same repair as _FDE */
282     {"_HID", AcpiNsRepair_HID},
283     {"_PRT", AcpiNsRepair_PRT},
284     {"_PSS", AcpiNsRepair_PSS},
285     {"_TSS", AcpiNsRepair_TSS},
286     {{0,0,0,0}, NULL}               /* Table terminator */
287 };
288 
289 
290 #define ACPI_FDE_FIELD_COUNT        5
291 #define ACPI_FDE_BYTE_BUFFER_SIZE   5
292 #define ACPI_FDE_DWORD_BUFFER_SIZE  (ACPI_FDE_FIELD_COUNT * (UINT32) sizeof (UINT32))
293 
294 
295 /******************************************************************************
296  *
297  * FUNCTION:    AcpiNsComplexRepairs
298  *
299  * PARAMETERS:  Info                - Method execution information block
300  *              Node                - Namespace node for the method/object
301  *              ValidateStatus      - Original status of earlier validation
302  *              ReturnObjectPtr     - Pointer to the object returned from the
303  *                                    evaluation of a method or object
304  *
305  * RETURN:      Status. AE_OK if repair was successful. If name is not
306  *              matched, ValidateStatus is returned.
307  *
308  * DESCRIPTION: Attempt to repair/convert a return object of a type that was
309  *              not expected.
310  *
311  *****************************************************************************/
312 
313 ACPI_STATUS
314 AcpiNsComplexRepairs (
315     ACPI_EVALUATE_INFO      *Info,
316     ACPI_NAMESPACE_NODE     *Node,
317     ACPI_STATUS             ValidateStatus,
318     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
319 {
320     const ACPI_REPAIR_INFO  *Predefined;
321     ACPI_STATUS             Status;
322 
323 
324     ACPI_FUNCTION_TRACE (NsComplexRepairs);
325 
326     /* Check if this name is in the list of repairable names */
327 
328     Predefined = AcpiNsMatchComplexRepair (Node);
329     if (!Predefined)
330     {
331         return_ACPI_STATUS (ValidateStatus);
332     }
333 
334     Status = Predefined->RepairFunction (Info, ReturnObjectPtr);
335     return_ACPI_STATUS (Status);
336 }
337 
338 
339 /******************************************************************************
340  *
341  * FUNCTION:    AcpiNsMatchComplexRepair
342  *
343  * PARAMETERS:  Node                - Namespace node for the method/object
344  *
345  * RETURN:      Pointer to entry in repair table. NULL indicates not found.
346  *
347  * DESCRIPTION: Check an object name against the repairable object list.
348  *
349  *****************************************************************************/
350 
351 static const ACPI_REPAIR_INFO *
352 AcpiNsMatchComplexRepair (
353     ACPI_NAMESPACE_NODE     *Node)
354 {
355     const ACPI_REPAIR_INFO  *ThisName;
356 
357 
358     /* Search info table for a repairable predefined method/object name */
359 
360     ThisName = AcpiNsRepairableNames;
361     while (ThisName->RepairFunction)
362     {
363         if (ACPI_COMPARE_NAMESEG (Node->Name.Ascii, ThisName->Name))
364         {
365             return (ThisName);
366         }
367 
368         ThisName++;
369     }
370 
371     return (NULL); /* Not found */
372 }
373 
374 
375 /******************************************************************************
376  *
377  * FUNCTION:    AcpiNsRepair_ALR
378  *
379  * PARAMETERS:  Info                - Method execution information block
380  *              ReturnObjectPtr     - Pointer to the object returned from the
381  *                                    evaluation of a method or object
382  *
383  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
384  *
385  * DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list
386  *              ascending by the ambient illuminance values.
387  *
388  *****************************************************************************/
389 
390 static ACPI_STATUS
391 AcpiNsRepair_ALR (
392     ACPI_EVALUATE_INFO      *Info,
393     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
394 {
395     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
396     ACPI_STATUS             Status;
397 
398 
399     Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 2, 1,
400         ACPI_SORT_ASCENDING, "AmbientIlluminance");
401 
402     return (Status);
403 }
404 
405 
406 /******************************************************************************
407  *
408  * FUNCTION:    AcpiNsRepair_FDE
409  *
410  * PARAMETERS:  Info                - Method execution information block
411  *              ReturnObjectPtr     - Pointer to the object returned from the
412  *                                    evaluation of a method or object
413  *
414  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
415  *
416  * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return
417  *              value is a Buffer of 5 DWORDs. This function repairs a common
418  *              problem where the return value is a Buffer of BYTEs, not
419  *              DWORDs.
420  *
421  *****************************************************************************/
422 
423 static ACPI_STATUS
424 AcpiNsRepair_FDE (
425     ACPI_EVALUATE_INFO      *Info,
426     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
427 {
428     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
429     ACPI_OPERAND_OBJECT     *BufferObject;
430     UINT8                   *ByteBuffer;
431     UINT32                  *DwordBuffer;
432     UINT32                  i;
433 
434 
435     ACPI_FUNCTION_NAME (NsRepair_FDE);
436 
437 
438     switch (ReturnObject->Common.Type)
439     {
440     case ACPI_TYPE_BUFFER:
441 
442         /* This is the expected type. Length should be (at least) 5 DWORDs */
443 
444         if (ReturnObject->Buffer.Length >= ACPI_FDE_DWORD_BUFFER_SIZE)
445         {
446             return (AE_OK);
447         }
448 
449         /* We can only repair if we have exactly 5 BYTEs */
450 
451         if (ReturnObject->Buffer.Length != ACPI_FDE_BYTE_BUFFER_SIZE)
452         {
453             ACPI_WARN_PREDEFINED ((AE_INFO,
454                 Info->FullPathname, Info->NodeFlags,
455                 "Incorrect return buffer length %u, expected %u",
456                 ReturnObject->Buffer.Length, ACPI_FDE_DWORD_BUFFER_SIZE));
457 
458             return (AE_AML_OPERAND_TYPE);
459         }
460 
461         /* Create the new (larger) buffer object */
462 
463         BufferObject = AcpiUtCreateBufferObject (
464             ACPI_FDE_DWORD_BUFFER_SIZE);
465         if (!BufferObject)
466         {
467             return (AE_NO_MEMORY);
468         }
469 
470         /* Expand each byte to a DWORD */
471 
472         ByteBuffer = ReturnObject->Buffer.Pointer;
473         DwordBuffer = ACPI_CAST_PTR (UINT32,
474             BufferObject->Buffer.Pointer);
475 
476         for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++)
477         {
478             *DwordBuffer = (UINT32) *ByteBuffer;
479             DwordBuffer++;
480             ByteBuffer++;
481         }
482 
483         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
484             "%s Expanded Byte Buffer to expected DWord Buffer\n",
485             Info->FullPathname));
486         break;
487 
488     default:
489 
490         return (AE_AML_OPERAND_TYPE);
491     }
492 
493     /* Delete the original return object, return the new buffer object */
494 
495     AcpiUtRemoveReference (ReturnObject);
496     *ReturnObjectPtr = BufferObject;
497 
498     Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
499     return (AE_OK);
500 }
501 
502 
503 /******************************************************************************
504  *
505  * FUNCTION:    AcpiNsRepair_CID
506  *
507  * PARAMETERS:  Info                - Method execution information block
508  *              ReturnObjectPtr     - Pointer to the object returned from the
509  *                                    evaluation of a method or object
510  *
511  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
512  *
513  * DESCRIPTION: Repair for the _CID object. If a string, ensure that all
514  *              letters are uppercase and that there is no leading asterisk.
515  *              If a Package, ensure same for all string elements.
516  *
517  *****************************************************************************/
518 
519 static ACPI_STATUS
520 AcpiNsRepair_CID (
521     ACPI_EVALUATE_INFO      *Info,
522     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
523 {
524     ACPI_STATUS             Status;
525     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
526     ACPI_OPERAND_OBJECT     **ElementPtr;
527     ACPI_OPERAND_OBJECT     *OriginalElement;
528     UINT16                  OriginalRefCount;
529     UINT32                  i;
530 
531     ACPI_FUNCTION_TRACE (NsRepair_CID);
532 
533     /* Check for _CID as a simple string */
534 
535     if (ReturnObject->Common.Type == ACPI_TYPE_STRING)
536     {
537         Status = AcpiNsRepair_HID (Info, ReturnObjectPtr);
538         return_ACPI_STATUS (Status);
539     }
540 
541     /* Exit if not a Package */
542 
543     if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
544     {
545         return_ACPI_STATUS (AE_OK);
546     }
547 
548     /* Examine each element of the _CID package */
549 
550     ElementPtr = ReturnObject->Package.Elements;
551     for (i = 0; i < ReturnObject->Package.Count; i++)
552     {
553         OriginalElement = *ElementPtr;
554         OriginalRefCount = OriginalElement->Common.ReferenceCount;
555 
556         Status = AcpiNsRepair_HID (Info, ElementPtr);
557         if (ACPI_FAILURE (Status))
558         {
559             return_ACPI_STATUS (Status);
560         }
561 
562         if (OriginalElement != *ElementPtr)
563         {
564             /* Update reference count of new object */
565 
566             (*ElementPtr)->Common.ReferenceCount =
567                 OriginalRefCount;
568         }
569 
570         ElementPtr++;
571     }
572 
573     return_ACPI_STATUS (AE_OK);
574 }
575 
576 
577 /******************************************************************************
578  *
579  * FUNCTION:    AcpiNsRepair_CST
580  *
581  * PARAMETERS:  Info                - Method execution information block
582  *              ReturnObjectPtr     - Pointer to the object returned from the
583  *                                    evaluation of a method or object
584  *
585  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
586  *
587  * DESCRIPTION: Repair for the _CST object:
588  *              1. Sort the list ascending by C state type
589  *              2. Ensure type cannot be zero
590  *              3. A subpackage count of zero means _CST is meaningless
591  *              4. Count must match the number of C state subpackages
592  *
593  *****************************************************************************/
594 
595 static ACPI_STATUS
596 AcpiNsRepair_CST (
597     ACPI_EVALUATE_INFO      *Info,
598     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
599 {
600     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
601     ACPI_OPERAND_OBJECT     **OuterElements;
602     UINT32                  OuterElementCount;
603     ACPI_OPERAND_OBJECT     *ObjDesc;
604     ACPI_STATUS             Status;
605     BOOLEAN                 Removing;
606     UINT32                  i;
607 
608 
609     ACPI_FUNCTION_NAME (NsRepair_CST);
610 
611 
612     /*
613      * Check if the C-state type values are proportional.
614      */
615     OuterElementCount = ReturnObject->Package.Count - 1;
616     i = 0;
617     while (i < OuterElementCount)
618     {
619         OuterElements = &ReturnObject->Package.Elements[i + 1];
620         Removing = FALSE;
621 
622         if ((*OuterElements)->Package.Count == 0)
623         {
624             ACPI_WARN_PREDEFINED ((AE_INFO,
625                 Info->FullPathname, Info->NodeFlags,
626                 "SubPackage[%u] - removing entry due to zero count", i));
627             Removing = TRUE;
628             goto RemoveElement;
629         }
630 
631         ObjDesc = (*OuterElements)->Package.Elements[1]; /* Index1 = Type */
632         if ((UINT32) ObjDesc->Integer.Value == 0)
633         {
634             ACPI_WARN_PREDEFINED ((AE_INFO,
635                 Info->FullPathname, Info->NodeFlags,
636                 "SubPackage[%u] - removing entry due to invalid Type(0)", i));
637             Removing = TRUE;
638         }
639 
640 RemoveElement:
641         if (Removing)
642         {
643             AcpiNsRemoveElement (ReturnObject, i + 1);
644             OuterElementCount--;
645         }
646         else
647         {
648             i++;
649         }
650     }
651 
652     /* Update top-level package count, Type "Integer" checked elsewhere */
653 
654     ObjDesc = ReturnObject->Package.Elements[0];
655     ObjDesc->Integer.Value = OuterElementCount;
656 
657     /*
658      * Entries (subpackages) in the _CST Package must be sorted by the
659      * C-state type, in ascending order.
660      */
661     Status = AcpiNsCheckSortedList (Info, ReturnObject, 1, 4, 1,
662         ACPI_SORT_ASCENDING, "C-State Type");
663     if (ACPI_FAILURE (Status))
664     {
665         return (Status);
666     }
667 
668     return (AE_OK);
669 }
670 
671 
672 /******************************************************************************
673  *
674  * FUNCTION:    AcpiNsRepair_HID
675  *
676  * PARAMETERS:  Info                - Method execution information block
677  *              ReturnObjectPtr     - Pointer to the object returned from the
678  *                                    evaluation of a method or object
679  *
680  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
681  *
682  * DESCRIPTION: Repair for the _HID object. If a string, ensure that all
683  *              letters are uppercase and that there is no leading asterisk.
684  *
685  *****************************************************************************/
686 
687 static ACPI_STATUS
688 AcpiNsRepair_HID (
689     ACPI_EVALUATE_INFO      *Info,
690     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
691 {
692     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
693     char                    *Dest;
694     char                    *Source;
695 
696 
697     ACPI_FUNCTION_NAME (NsRepair_HID);
698 
699 
700     /* We only care about string _HID objects (not integers) */
701 
702     if (ReturnObject->Common.Type != ACPI_TYPE_STRING)
703     {
704         return_ACPI_STATUS (AE_OK);
705     }
706 
707     if (ReturnObject->String.Length == 0)
708     {
709         ACPI_WARN_PREDEFINED ((AE_INFO,
710             Info->FullPathname, Info->NodeFlags,
711             "Invalid zero-length _HID or _CID string"));
712 
713         /* Return AE_OK anyway, let driver handle it */
714 
715         Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
716         return_ACPI_STATUS (AE_OK);
717     }
718 
719     /*
720      * Remove a leading asterisk if present. For some unknown reason, there
721      * are many machines in the field that contains IDs like this.
722      *
723      * Examples: "*PNP0C03", "*ACPI0003"
724      */
725     Source = ReturnObject->String.Pointer;
726     if (*Source == '*')
727     {
728         Source++;
729         ReturnObject->String.Length--;
730 
731         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
732             "%s: Removed invalid leading asterisk\n", Info->FullPathname));
733     }
734 
735     /*
736      * Copy and uppercase the string. From the ACPI 5.0 specification:
737      *
738      * A valid PNP ID must be of the form "AAA####" where A is an uppercase
739      * letter and # is a hex digit. A valid ACPI ID must be of the form
740      * "NNNN####" where N is an uppercase letter or decimal digit, and
741      * # is a hex digit.
742      */
743     for (Dest = ReturnObject->String.Pointer; *Source; Dest++, Source++)
744     {
745         *Dest = (char) toupper ((int) *Source);
746     }
747     ReturnObject->String.Pointer[ReturnObject->String.Length] = 0;
748 
749     return_ACPI_STATUS (AE_OK);
750 }
751 
752 
753 /******************************************************************************
754  *
755  * FUNCTION:    AcpiNsRepair_PRT
756  *
757  * PARAMETERS:  Info                - Method execution information block
758  *              ReturnObjectPtr     - Pointer to the object returned from the
759  *                                    evaluation of a method or object
760  *
761  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
762  *
763  * DESCRIPTION: Repair for the _PRT object. If necessary, fix reversed
764  *              SourceName and SourceIndex field, a common BIOS bug.
765  *
766  *****************************************************************************/
767 
768 static ACPI_STATUS
769 AcpiNsRepair_PRT (
770     ACPI_EVALUATE_INFO      *Info,
771     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
772 {
773     ACPI_OPERAND_OBJECT     *PackageObject = *ReturnObjectPtr;
774     ACPI_OPERAND_OBJECT     **TopObjectList;
775     ACPI_OPERAND_OBJECT     **SubObjectList;
776     ACPI_OPERAND_OBJECT     *ObjDesc;
777     ACPI_OPERAND_OBJECT     *SubPackage;
778     UINT32                  ElementCount;
779     UINT32                  Index;
780 
781 
782     /* Each element in the _PRT package is a subpackage */
783 
784     TopObjectList = PackageObject->Package.Elements;
785     ElementCount = PackageObject->Package.Count;
786 
787     /* Examine each subpackage */
788 
789     for (Index = 0; Index < ElementCount; Index++, TopObjectList++)
790     {
791         SubPackage = *TopObjectList;
792         SubObjectList = SubPackage->Package.Elements;
793 
794         /* Check for minimum required element count */
795 
796         if (SubPackage->Package.Count < 4)
797         {
798             continue;
799         }
800 
801         /*
802          * If the BIOS has erroneously reversed the _PRT SourceName (index 2)
803          * and the SourceIndex (index 3), fix it. _PRT is important enough to
804          * workaround this BIOS error. This also provides compatibility with
805          * other ACPI implementations.
806          */
807         ObjDesc = SubObjectList[3];
808         if (!ObjDesc || (ObjDesc->Common.Type != ACPI_TYPE_INTEGER))
809         {
810             SubObjectList[3] = SubObjectList[2];
811             SubObjectList[2] = ObjDesc;
812             Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
813 
814             ACPI_WARN_PREDEFINED ((AE_INFO,
815                 Info->FullPathname, Info->NodeFlags,
816                 "PRT[%X]: Fixed reversed SourceName and SourceIndex",
817                 Index));
818         }
819     }
820 
821     return (AE_OK);
822 }
823 
824 
825 /******************************************************************************
826  *
827  * FUNCTION:    AcpiNsRepair_PSS
828  *
829  * PARAMETERS:  Info                - Method execution information block
830  *              ReturnObjectPtr     - Pointer to the object returned from the
831  *                                    evaluation of a method or object
832  *
833  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
834  *
835  * DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list
836  *              by the CPU frequencies. Check that the power dissipation values
837  *              are all proportional to CPU frequency (i.e., sorting by
838  *              frequency should be the same as sorting by power.)
839  *
840  *****************************************************************************/
841 
842 static ACPI_STATUS
843 AcpiNsRepair_PSS (
844     ACPI_EVALUATE_INFO      *Info,
845     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
846 {
847     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
848     ACPI_OPERAND_OBJECT     **OuterElements;
849     UINT32                  OuterElementCount;
850     ACPI_OPERAND_OBJECT     **Elements;
851     ACPI_OPERAND_OBJECT     *ObjDesc;
852     UINT32                  PreviousValue;
853     ACPI_STATUS             Status;
854     UINT32                  i;
855 
856 
857     /*
858      * Entries (subpackages) in the _PSS Package must be sorted by power
859      * dissipation, in descending order. If it appears that the list is
860      * incorrectly sorted, sort it. We sort by CpuFrequency, since this
861      * should be proportional to the power.
862      */
863     Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 6, 0,
864         ACPI_SORT_DESCENDING, "CpuFrequency");
865     if (ACPI_FAILURE (Status))
866     {
867         return (Status);
868     }
869 
870     /*
871      * We now know the list is correctly sorted by CPU frequency. Check if
872      * the power dissipation values are proportional.
873      */
874     PreviousValue = ACPI_UINT32_MAX;
875     OuterElements = ReturnObject->Package.Elements;
876     OuterElementCount = ReturnObject->Package.Count;
877 
878     for (i = 0; i < OuterElementCount; i++)
879     {
880         Elements = (*OuterElements)->Package.Elements;
881         ObjDesc = Elements[1]; /* Index1 = PowerDissipation */
882 
883         if ((UINT32) ObjDesc->Integer.Value > PreviousValue)
884         {
885             ACPI_WARN_PREDEFINED ((AE_INFO,
886                 Info->FullPathname, Info->NodeFlags,
887                 "SubPackage[%u,%u] - suspicious power dissipation values",
888                 i-1, i));
889         }
890 
891         PreviousValue = (UINT32) ObjDesc->Integer.Value;
892         OuterElements++;
893     }
894 
895     return (AE_OK);
896 }
897 
898 
899 /******************************************************************************
900  *
901  * FUNCTION:    AcpiNsRepair_TSS
902  *
903  * PARAMETERS:  Info                - Method execution information block
904  *              ReturnObjectPtr     - Pointer to the object returned from the
905  *                                    evaluation of a method or object
906  *
907  * RETURN:      Status. AE_OK if object is OK or was repaired successfully
908  *
909  * DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list
910  *              descending by the power dissipation values.
911  *
912  *****************************************************************************/
913 
914 static ACPI_STATUS
915 AcpiNsRepair_TSS (
916     ACPI_EVALUATE_INFO      *Info,
917     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
918 {
919     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
920     ACPI_STATUS             Status;
921     ACPI_NAMESPACE_NODE     *Node;
922 
923 
924     /*
925      * We can only sort the _TSS return package if there is no _PSS in the
926      * same scope. This is because if _PSS is present, the ACPI specification
927      * dictates that the _TSS Power Dissipation field is to be ignored, and
928      * therefore some BIOSs leave garbage values in the _TSS Power field(s).
929      * In this case, it is best to just return the _TSS package as-is.
930      * (May, 2011)
931      */
932     Status = AcpiNsGetNode (Info->Node, "^_PSS",
933         ACPI_NS_NO_UPSEARCH, &Node);
934     if (ACPI_SUCCESS (Status))
935     {
936         return (AE_OK);
937     }
938 
939     Status = AcpiNsCheckSortedList (Info, ReturnObject, 0, 5, 1,
940         ACPI_SORT_DESCENDING, "PowerDissipation");
941 
942     return (Status);
943 }
944 
945 
946 /******************************************************************************
947  *
948  * FUNCTION:    AcpiNsCheckSortedList
949  *
950  * PARAMETERS:  Info                - Method execution information block
951  *              ReturnObject        - Pointer to the top-level returned object
952  *              StartIndex          - Index of the first subpackage
953  *              ExpectedCount       - Minimum length of each subpackage
954  *              SortIndex           - Subpackage entry to sort on
955  *              SortDirection       - Ascending or descending
956  *              SortKeyName         - Name of the SortIndex field
957  *
958  * RETURN:      Status. AE_OK if the list is valid and is sorted correctly or
959  *              has been repaired by sorting the list.
960  *
961  * DESCRIPTION: Check if the package list is valid and sorted correctly by the
962  *              SortIndex. If not, then sort the list.
963  *
964  *****************************************************************************/
965 
966 static ACPI_STATUS
967 AcpiNsCheckSortedList (
968     ACPI_EVALUATE_INFO      *Info,
969     ACPI_OPERAND_OBJECT     *ReturnObject,
970     UINT32                  StartIndex,
971     UINT32                  ExpectedCount,
972     UINT32                  SortIndex,
973     UINT8                   SortDirection,
974     char                    *SortKeyName)
975 {
976     UINT32                  OuterElementCount;
977     ACPI_OPERAND_OBJECT     **OuterElements;
978     ACPI_OPERAND_OBJECT     **Elements;
979     ACPI_OPERAND_OBJECT     *ObjDesc;
980     UINT32                  i;
981     UINT32                  PreviousValue;
982 
983 
984     ACPI_FUNCTION_NAME (NsCheckSortedList);
985 
986 
987     /* The top-level object must be a package */
988 
989     if (ReturnObject->Common.Type != ACPI_TYPE_PACKAGE)
990     {
991         return (AE_AML_OPERAND_TYPE);
992     }
993 
994     /*
995      * NOTE: assumes list of subpackages contains no NULL elements.
996      * Any NULL elements should have been removed by earlier call
997      * to AcpiNsRemoveNullElements.
998      */
999     OuterElementCount = ReturnObject->Package.Count;
1000     if (!OuterElementCount || StartIndex >= OuterElementCount)
1001     {
1002         return (AE_AML_PACKAGE_LIMIT);
1003     }
1004 
1005     OuterElements = &ReturnObject->Package.Elements[StartIndex];
1006     OuterElementCount -= StartIndex;
1007 
1008     PreviousValue = 0;
1009     if (SortDirection == ACPI_SORT_DESCENDING)
1010     {
1011         PreviousValue = ACPI_UINT32_MAX;
1012     }
1013 
1014     /* Examine each subpackage */
1015 
1016     for (i = 0; i < OuterElementCount; i++)
1017     {
1018         /* Each element of the top-level package must also be a package */
1019 
1020         if ((*OuterElements)->Common.Type != ACPI_TYPE_PACKAGE)
1021         {
1022             return (AE_AML_OPERAND_TYPE);
1023         }
1024 
1025         /* Each subpackage must have the minimum length */
1026 
1027         if ((*OuterElements)->Package.Count < ExpectedCount)
1028         {
1029             return (AE_AML_PACKAGE_LIMIT);
1030         }
1031 
1032         Elements = (*OuterElements)->Package.Elements;
1033         ObjDesc = Elements[SortIndex];
1034 
1035         if (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)
1036         {
1037             return (AE_AML_OPERAND_TYPE);
1038         }
1039 
1040         /*
1041          * The list must be sorted in the specified order. If we detect a
1042          * discrepancy, sort the entire list.
1043          */
1044         if (((SortDirection == ACPI_SORT_ASCENDING) &&
1045                 (ObjDesc->Integer.Value < PreviousValue)) ||
1046             ((SortDirection == ACPI_SORT_DESCENDING) &&
1047                 (ObjDesc->Integer.Value > PreviousValue)))
1048         {
1049             AcpiNsSortList (&ReturnObject->Package.Elements[StartIndex],
1050                 OuterElementCount, SortIndex, SortDirection);
1051 
1052             Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
1053 
1054             ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
1055                 "%s: Repaired unsorted list - now sorted by %s\n",
1056                 Info->FullPathname, SortKeyName));
1057             return (AE_OK);
1058         }
1059 
1060         PreviousValue = (UINT32) ObjDesc->Integer.Value;
1061         OuterElements++;
1062     }
1063 
1064     return (AE_OK);
1065 }
1066 
1067 
1068 /******************************************************************************
1069  *
1070  * FUNCTION:    AcpiNsSortList
1071  *
1072  * PARAMETERS:  Elements            - Package object element list
1073  *              Count               - Element count for above
1074  *              Index               - Sort by which package element
1075  *              SortDirection       - Ascending or Descending sort
1076  *
1077  * RETURN:      None
1078  *
1079  * DESCRIPTION: Sort the objects that are in a package element list.
1080  *
1081  * NOTE: Assumes that all NULL elements have been removed from the package,
1082  *       and that all elements have been verified to be of type Integer.
1083  *
1084  *****************************************************************************/
1085 
1086 static void
1087 AcpiNsSortList (
1088     ACPI_OPERAND_OBJECT     **Elements,
1089     UINT32                  Count,
1090     UINT32                  Index,
1091     UINT8                   SortDirection)
1092 {
1093     ACPI_OPERAND_OBJECT     *ObjDesc1;
1094     ACPI_OPERAND_OBJECT     *ObjDesc2;
1095     ACPI_OPERAND_OBJECT     *TempObj;
1096     UINT32                  i;
1097     UINT32                  j;
1098 
1099 
1100     /* Simple bubble sort */
1101 
1102     for (i = 1; i < Count; i++)
1103     {
1104         for (j = (Count - 1); j >= i; j--)
1105         {
1106             ObjDesc1 = Elements[j-1]->Package.Elements[Index];
1107             ObjDesc2 = Elements[j]->Package.Elements[Index];
1108 
1109             if (((SortDirection == ACPI_SORT_ASCENDING) &&
1110                     (ObjDesc1->Integer.Value > ObjDesc2->Integer.Value)) ||
1111 
1112                 ((SortDirection == ACPI_SORT_DESCENDING) &&
1113                     (ObjDesc1->Integer.Value < ObjDesc2->Integer.Value)))
1114             {
1115                 TempObj = Elements[j-1];
1116                 Elements[j-1] = Elements[j];
1117                 Elements[j] = TempObj;
1118             }
1119         }
1120     }
1121 }
1122 
1123 
1124 /******************************************************************************
1125  *
1126  * FUNCTION:    AcpiNsRemoveElement
1127  *
1128  * PARAMETERS:  ObjDesc             - Package object element list
1129  *              Index               - Index of element to remove
1130  *
1131  * RETURN:      None
1132  *
1133  * DESCRIPTION: Remove the requested element of a package and delete it.
1134  *
1135  *****************************************************************************/
1136 
1137 static void
1138 AcpiNsRemoveElement (
1139     ACPI_OPERAND_OBJECT     *ObjDesc,
1140     UINT32                  Index)
1141 {
1142     ACPI_OPERAND_OBJECT     **Source;
1143     ACPI_OPERAND_OBJECT     **Dest;
1144     UINT32                  Count;
1145     UINT32                  NewCount;
1146     UINT32                  i;
1147 
1148 
1149     ACPI_FUNCTION_NAME (NsRemoveElement);
1150 
1151 
1152     Count = ObjDesc->Package.Count;
1153     NewCount = Count - 1;
1154 
1155     Source = ObjDesc->Package.Elements;
1156     Dest = Source;
1157 
1158     /* Examine all elements of the package object, remove matched index */
1159 
1160     for (i = 0; i < Count; i++)
1161     {
1162         if (i == Index)
1163         {
1164             AcpiUtRemoveReference (*Source); /* Remove one ref for being in pkg */
1165             AcpiUtRemoveReference (*Source);
1166         }
1167         else
1168         {
1169             *Dest = *Source;
1170             Dest++;
1171         }
1172 
1173         Source++;
1174     }
1175 
1176     /* NULL terminate list and update the package count */
1177 
1178     *Dest = NULL;
1179     ObjDesc->Package.Count = NewCount;
1180 }
1181