xref: /freebsd/sys/contrib/dev/acpica/components/namespace/nsprepkg.c (revision 5956d97f4b3204318ceb6aa9c77bd0bc6ea87a41)
1 /******************************************************************************
2  *
3  * Module Name: nsprepkg - Validation of package objects for predefined names
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp.
12  * All rights reserved.
13  *
14  * 2. License
15  *
16  * 2.1. This is your license from Intel Corp. under its intellectual property
17  * rights. You may have additional license terms from the party that provided
18  * you this software, covering your right to use that party's intellectual
19  * property rights.
20  *
21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22  * copy of the source code appearing in this file ("Covered Code") an
23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24  * base code distributed originally by Intel ("Original Intel Code") to copy,
25  * make derivatives, distribute, use and display any portion of the Covered
26  * Code in any form, with the right to sublicense such rights; and
27  *
28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29  * license (with the right to sublicense), under only those claims of Intel
30  * patents that are infringed by the Original Intel Code, to make, use, sell,
31  * offer to sell, and import the Covered Code and derivative works thereof
32  * solely to the minimum extent necessary to exercise the above copyright
33  * license, and in no event shall the patent license extend to any additions
34  * to or modifications of the Original Intel Code. No other license or right
35  * is granted directly or by implication, estoppel or otherwise;
36  *
37  * The above copyright and patent license is granted only if the following
38  * conditions are met:
39  *
40  * 3. Conditions
41  *
42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43  * Redistribution of source code of any substantial portion of the Covered
44  * Code or modification with rights to further distribute source must include
45  * the above Copyright Notice, the above License, this list of Conditions,
46  * and the following Disclaimer and Export Compliance provision. In addition,
47  * Licensee must cause all Covered Code to which Licensee contributes to
48  * contain a file documenting the changes Licensee made to create that Covered
49  * Code and the date of any change. Licensee must include in that file the
50  * documentation of any changes made by any predecessor Licensee. Licensee
51  * must include a prominent statement that the modification is derived,
52  * directly or indirectly, from Original Intel Code.
53  *
54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55  * Redistribution of source code of any substantial portion of the Covered
56  * Code or modification without rights to further distribute source must
57  * include the following Disclaimer and Export Compliance provision in the
58  * documentation and/or other materials provided with distribution. In
59  * addition, Licensee may not authorize further sublicense of source of any
60  * portion of the Covered Code, and must include terms to the effect that the
61  * license from Licensee to its licensee is limited to the intellectual
62  * property embodied in the software Licensee provides to its licensee, and
63  * not to intellectual property embodied in modifications its licensee may
64  * make.
65  *
66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
67  * substantial portion of the Covered Code or modification must reproduce the
68  * above Copyright Notice, and the following Disclaimer and Export Compliance
69  * provision in the documentation and/or other materials provided with the
70  * distribution.
71  *
72  * 3.4. Intel retains all right, title, and interest in and to the Original
73  * Intel Code.
74  *
75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76  * Intel shall be used in advertising or otherwise to promote the sale, use or
77  * other dealings in products derived from or relating to the Covered Code
78  * without prior written authorization from Intel.
79  *
80  * 4. Disclaimer and Export Compliance
81  *
82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88  * PARTICULAR PURPOSE.
89  *
90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97  * LIMITED REMEDY.
98  *
99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
100  * software or system incorporating such software without first obtaining any
101  * required license or other approval from the U. S. Department of Commerce or
102  * any other agency or department of the United States Government. In the
103  * event Licensee exports any such software from the United States or
104  * re-exports any such software from a foreign destination, Licensee shall
105  * ensure that the distribution and export/re-export of the software is in
106  * compliance with all laws, regulations, orders, or other restrictions of the
107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108  * any of its subsidiaries will export/re-export any technical data, process,
109  * software, or service, directly or indirectly, to any country for which the
110  * United States government or any agency thereof requires an export license,
111  * other governmental approval, or letter of assurance, without first obtaining
112  * such license, approval or letter.
113  *
114  *****************************************************************************
115  *
116  * Alternatively, you may choose to be licensed under the terms of the
117  * following license:
118  *
119  * Redistribution and use in source and binary forms, with or without
120  * modification, are permitted provided that the following conditions
121  * are met:
122  * 1. Redistributions of source code must retain the above copyright
123  *    notice, this list of conditions, and the following disclaimer,
124  *    without modification.
125  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126  *    substantially similar to the "NO WARRANTY" disclaimer below
127  *    ("Disclaimer") and any redistribution must be conditioned upon
128  *    including a substantially similar Disclaimer requirement for further
129  *    binary redistribution.
130  * 3. Neither the names of the above-listed copyright holders nor the names
131  *    of any contributors may be used to endorse or promote products derived
132  *    from this software without specific prior written permission.
133  *
134  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145  *
146  * Alternatively, you may choose to be licensed under the terms of the
147  * GNU General Public License ("GPL") version 2 as published by the Free
148  * Software Foundation.
149  *
150  *****************************************************************************/
151 
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acnamesp.h>
155 #include <contrib/dev/acpica/include/acpredef.h>
156 
157 
158 #define _COMPONENT          ACPI_NAMESPACE
159         ACPI_MODULE_NAME    ("nsprepkg")
160 
161 
162 /* Local prototypes */
163 
164 static ACPI_STATUS
165 AcpiNsCheckPackageList (
166     ACPI_EVALUATE_INFO          *Info,
167     const ACPI_PREDEFINED_INFO  *Package,
168     ACPI_OPERAND_OBJECT         **Elements,
169     UINT32                      Count);
170 
171 static ACPI_STATUS
172 AcpiNsCheckPackageElements (
173     ACPI_EVALUATE_INFO          *Info,
174     ACPI_OPERAND_OBJECT         **Elements,
175     UINT8                       Type1,
176     UINT32                      Count1,
177     UINT8                       Type2,
178     UINT32                      Count2,
179     UINT32                      StartIndex);
180 
181 static ACPI_STATUS
182 AcpiNsCustomPackage (
183     ACPI_EVALUATE_INFO          *Info,
184     ACPI_OPERAND_OBJECT         **Elements,
185     UINT32                      Count);
186 
187 
188 /*******************************************************************************
189  *
190  * FUNCTION:    AcpiNsCheckPackage
191  *
192  * PARAMETERS:  Info                - Method execution information block
193  *              ReturnObjectPtr     - Pointer to the object returned from the
194  *                                    evaluation of a method or object
195  *
196  * RETURN:      Status
197  *
198  * DESCRIPTION: Check a returned package object for the correct count and
199  *              correct type of all sub-objects.
200  *
201  ******************************************************************************/
202 
203 ACPI_STATUS
204 AcpiNsCheckPackage (
205     ACPI_EVALUATE_INFO          *Info,
206     ACPI_OPERAND_OBJECT         **ReturnObjectPtr)
207 {
208     ACPI_OPERAND_OBJECT         *ReturnObject = *ReturnObjectPtr;
209     const ACPI_PREDEFINED_INFO  *Package;
210     ACPI_OPERAND_OBJECT         **Elements;
211     ACPI_STATUS                 Status = AE_OK;
212     UINT32                      ExpectedCount;
213     UINT32                      Count;
214     UINT32                      i;
215 
216 
217     ACPI_FUNCTION_TRACE (NsCheckPackage);
218 
219 
220     /* The package info for this name is in the next table entry */
221 
222     Package = Info->Predefined + 1;
223 
224     ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
225         "%s Validating return Package of Type %X, Count %X\n",
226         Info->FullPathname, Package->RetInfo.Type,
227         ReturnObject->Package.Count));
228 
229     /*
230      * For variable-length Packages, we can safely remove all embedded
231      * and trailing NULL package elements
232      */
233     AcpiNsRemoveNullElements (Info, Package->RetInfo.Type, ReturnObject);
234 
235     /* Extract package count and elements array */
236 
237     Elements = ReturnObject->Package.Elements;
238     Count = ReturnObject->Package.Count;
239 
240     /*
241      * Most packages must have at least one element. The only exception
242      * is the variable-length package (ACPI_PTYPE1_VAR).
243      */
244     if (!Count)
245     {
246         if (Package->RetInfo.Type == ACPI_PTYPE1_VAR)
247         {
248             return_ACPI_STATUS (AE_OK);
249         }
250 
251         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
252             "Return Package has no elements (empty)"));
253 
254         return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
255     }
256 
257     /*
258      * Decode the type of the expected package contents
259      *
260      * PTYPE1 packages contain no subpackages
261      * PTYPE2 packages contain subpackages
262      */
263     switch (Package->RetInfo.Type)
264     {
265     case ACPI_PTYPE_CUSTOM:
266 
267         Status = AcpiNsCustomPackage (Info, Elements, Count);
268         break;
269 
270     case ACPI_PTYPE1_FIXED:
271         /*
272          * The package count is fixed and there are no subpackages
273          *
274          * If package is too small, exit.
275          * If package is larger than expected, issue warning but continue
276          */
277         ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
278         if (Count < ExpectedCount)
279         {
280             goto PackageTooSmall;
281         }
282         else if (Count > ExpectedCount)
283         {
284             ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
285                 "%s: Return Package is larger than needed - "
286                 "found %u, expected %u\n",
287                 Info->FullPathname, Count, ExpectedCount));
288         }
289 
290         /* Validate all elements of the returned package */
291 
292         Status = AcpiNsCheckPackageElements (Info, Elements,
293             Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
294             Package->RetInfo.ObjectType2, Package->RetInfo.Count2, 0);
295         break;
296 
297     case ACPI_PTYPE1_VAR:
298         /*
299          * The package count is variable, there are no subpackages, and all
300          * elements must be of the same type
301          */
302         for (i = 0; i < Count; i++)
303         {
304             Status = AcpiNsCheckObjectType (Info, Elements,
305                 Package->RetInfo.ObjectType1, i);
306             if (ACPI_FAILURE (Status))
307             {
308                 return_ACPI_STATUS (Status);
309             }
310 
311             Elements++;
312         }
313         break;
314 
315     case ACPI_PTYPE1_OPTION:
316         /*
317          * The package count is variable, there are no subpackages. There are
318          * a fixed number of required elements, and a variable number of
319          * optional elements.
320          *
321          * Check if package is at least as large as the minimum required
322          */
323         ExpectedCount = Package->RetInfo3.Count;
324         if (Count < ExpectedCount)
325         {
326             goto PackageTooSmall;
327         }
328 
329         /* Variable number of sub-objects */
330 
331         for (i = 0; i < Count; i++)
332         {
333             if (i < Package->RetInfo3.Count)
334             {
335                 /* These are the required package elements (0, 1, or 2) */
336 
337                 Status = AcpiNsCheckObjectType (Info, Elements,
338                     Package->RetInfo3.ObjectType[i], i);
339                 if (ACPI_FAILURE (Status))
340                 {
341                     return_ACPI_STATUS (Status);
342                 }
343             }
344             else
345             {
346                 /* These are the optional package elements */
347 
348                 Status = AcpiNsCheckObjectType (Info, Elements,
349                     Package->RetInfo3.TailObjectType, i);
350                 if (ACPI_FAILURE (Status))
351                 {
352                     return_ACPI_STATUS (Status);
353                 }
354             }
355 
356             Elements++;
357         }
358         break;
359 
360     case ACPI_PTYPE2_REV_FIXED:
361 
362         /* First element is the (Integer) revision */
363 
364         Status = AcpiNsCheckObjectType (
365             Info, Elements, ACPI_RTYPE_INTEGER, 0);
366         if (ACPI_FAILURE (Status))
367         {
368             return_ACPI_STATUS (Status);
369         }
370 
371         Elements++;
372         Count--;
373 
374         /* Examine the subpackages */
375 
376         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
377         break;
378 
379     case ACPI_PTYPE2_PKG_COUNT:
380 
381         /* First element is the (Integer) count of subpackages to follow */
382 
383         Status = AcpiNsCheckObjectType (
384             Info, Elements, ACPI_RTYPE_INTEGER, 0);
385         if (ACPI_FAILURE (Status))
386         {
387             return_ACPI_STATUS (Status);
388         }
389 
390         /*
391          * Count cannot be larger than the parent package length, but allow it
392          * to be smaller. The >= accounts for the Integer above.
393          */
394         ExpectedCount = (UINT32) (*Elements)->Integer.Value;
395         if (ExpectedCount >= Count)
396         {
397             goto PackageTooSmall;
398         }
399 
400         Count = ExpectedCount;
401         Elements++;
402 
403         /* Examine the subpackages */
404 
405         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
406         break;
407 
408     case ACPI_PTYPE2:
409     case ACPI_PTYPE2_FIXED:
410     case ACPI_PTYPE2_MIN:
411     case ACPI_PTYPE2_COUNT:
412     case ACPI_PTYPE2_FIX_VAR:
413         /*
414          * These types all return a single Package that consists of a
415          * variable number of subpackages.
416          *
417          * First, ensure that the first element is a subpackage. If not,
418          * the BIOS may have incorrectly returned the object as a single
419          * package instead of a Package of Packages (a common error if
420          * there is only one entry). We may be able to repair this by
421          * wrapping the returned Package with a new outer Package.
422          */
423         if (*Elements && ((*Elements)->Common.Type != ACPI_TYPE_PACKAGE))
424         {
425             /* Create the new outer package and populate it */
426 
427             Status = AcpiNsWrapWithPackage (
428                 Info, ReturnObject, ReturnObjectPtr);
429             if (ACPI_FAILURE (Status))
430             {
431                 return_ACPI_STATUS (Status);
432             }
433 
434             /* Update locals to point to the new package (of 1 element) */
435 
436             ReturnObject = *ReturnObjectPtr;
437             Elements = ReturnObject->Package.Elements;
438             Count = 1;
439         }
440 
441         /* Examine the subpackages */
442 
443         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
444         break;
445 
446     case ACPI_PTYPE2_VAR_VAR:
447         /*
448          * Returns a variable list of packages, each with a variable list
449          * of objects.
450          */
451         break;
452 
453     case ACPI_PTYPE2_UUID_PAIR:
454 
455         /* The package must contain pairs of (UUID + type) */
456 
457         if (Count & 1)
458         {
459             ExpectedCount = Count + 1;
460             goto PackageTooSmall;
461         }
462 
463         while (Count > 0)
464         {
465             Status = AcpiNsCheckObjectType(Info, Elements,
466                 Package->RetInfo.ObjectType1, 0);
467             if (ACPI_FAILURE(Status))
468             {
469                 return_ACPI_STATUS (Status);
470             }
471 
472             /* Validate length of the UUID buffer */
473 
474             if ((*Elements)->Buffer.Length != 16)
475             {
476                 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
477                     Info->NodeFlags, "Invalid length for UUID Buffer"));
478                 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
479             }
480 
481             Status = AcpiNsCheckObjectType(Info, Elements + 1,
482                 Package->RetInfo.ObjectType2, 0);
483             if (ACPI_FAILURE(Status))
484             {
485                 return_ACPI_STATUS (Status);
486             }
487 
488             Elements += 2;
489             Count -= 2;
490         }
491         break;
492 
493     default:
494 
495         /* Should not get here if predefined info table is correct */
496 
497         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
498             "Invalid internal return type in table entry: %X",
499             Package->RetInfo.Type));
500 
501         return_ACPI_STATUS (AE_AML_INTERNAL);
502     }
503 
504     return_ACPI_STATUS (Status);
505 
506 
507 PackageTooSmall:
508 
509     /* Error exit for the case with an incorrect package count */
510 
511     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
512         "Return Package is too small - found %u elements, expected %u",
513         Count, ExpectedCount));
514 
515     return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
516 }
517 
518 
519 /*******************************************************************************
520  *
521  * FUNCTION:    AcpiNsCheckPackageList
522  *
523  * PARAMETERS:  Info            - Method execution information block
524  *              Package         - Pointer to package-specific info for method
525  *              Elements        - Element list of parent package. All elements
526  *                                of this list should be of type Package.
527  *              Count           - Count of subpackages
528  *
529  * RETURN:      Status
530  *
531  * DESCRIPTION: Examine a list of subpackages
532  *
533  ******************************************************************************/
534 
535 static ACPI_STATUS
536 AcpiNsCheckPackageList (
537     ACPI_EVALUATE_INFO          *Info,
538     const ACPI_PREDEFINED_INFO  *Package,
539     ACPI_OPERAND_OBJECT         **Elements,
540     UINT32                      Count)
541 {
542     ACPI_OPERAND_OBJECT         *SubPackage;
543     ACPI_OPERAND_OBJECT         **SubElements;
544     ACPI_STATUS                 Status;
545     UINT32                      ExpectedCount;
546     UINT32                      i;
547     UINT32                      j;
548 
549 
550     /*
551      * Validate each subpackage in the parent Package
552      *
553      * NOTE: assumes list of subpackages contains no NULL elements.
554      * Any NULL elements should have been removed by earlier call
555      * to AcpiNsRemoveNullElements.
556      */
557     for (i = 0; i < Count; i++)
558     {
559         SubPackage = *Elements;
560         SubElements = SubPackage->Package.Elements;
561         Info->ParentPackage = SubPackage;
562 
563         /* Each sub-object must be of type Package */
564 
565         Status = AcpiNsCheckObjectType (Info, &SubPackage,
566             ACPI_RTYPE_PACKAGE, i);
567         if (ACPI_FAILURE (Status))
568         {
569             return (Status);
570         }
571 
572         /* Examine the different types of expected subpackages */
573 
574         Info->ParentPackage = SubPackage;
575         switch (Package->RetInfo.Type)
576         {
577         case ACPI_PTYPE2:
578         case ACPI_PTYPE2_PKG_COUNT:
579         case ACPI_PTYPE2_REV_FIXED:
580 
581             /* Each subpackage has a fixed number of elements */
582 
583             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
584             if (SubPackage->Package.Count < ExpectedCount)
585             {
586                 goto PackageTooSmall;
587             }
588 
589             Status = AcpiNsCheckPackageElements (Info, SubElements,
590                 Package->RetInfo.ObjectType1,
591                 Package->RetInfo.Count1,
592                 Package->RetInfo.ObjectType2,
593                 Package->RetInfo.Count2, 0);
594             if (ACPI_FAILURE (Status))
595             {
596                 return (Status);
597             }
598             break;
599 
600         case ACPI_PTYPE2_FIX_VAR:
601             /*
602              * Each subpackage has a fixed number of elements and an
603              * optional element
604              */
605             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
606             if (SubPackage->Package.Count < ExpectedCount)
607             {
608                 goto PackageTooSmall;
609             }
610 
611             Status = AcpiNsCheckPackageElements (Info, SubElements,
612                 Package->RetInfo.ObjectType1,
613                 Package->RetInfo.Count1,
614                 Package->RetInfo.ObjectType2,
615                 SubPackage->Package.Count - Package->RetInfo.Count1, 0);
616             if (ACPI_FAILURE (Status))
617             {
618                 return (Status);
619             }
620             break;
621 
622         case ACPI_PTYPE2_VAR_VAR:
623             /*
624              * Each subpackage has a fixed or variable number of elements
625              */
626             break;
627 
628         case ACPI_PTYPE2_FIXED:
629 
630             /* Each subpackage has a fixed length */
631 
632             ExpectedCount = Package->RetInfo2.Count;
633             if (SubPackage->Package.Count < ExpectedCount)
634             {
635                 goto PackageTooSmall;
636             }
637 
638             /* Check the type of each subpackage element */
639 
640             for (j = 0; j < ExpectedCount; j++)
641             {
642                 Status = AcpiNsCheckObjectType (Info, &SubElements[j],
643                     Package->RetInfo2.ObjectType[j], j);
644                 if (ACPI_FAILURE (Status))
645                 {
646                     return (Status);
647                 }
648             }
649             break;
650 
651         case ACPI_PTYPE2_MIN:
652 
653             /* Each subpackage has a variable but minimum length */
654 
655             ExpectedCount = Package->RetInfo.Count1;
656             if (SubPackage->Package.Count < ExpectedCount)
657             {
658                 goto PackageTooSmall;
659             }
660 
661             /* Check the type of each subpackage element */
662 
663             Status = AcpiNsCheckPackageElements (Info, SubElements,
664                 Package->RetInfo.ObjectType1,
665                 SubPackage->Package.Count, 0, 0, 0);
666             if (ACPI_FAILURE (Status))
667             {
668                 return (Status);
669             }
670             break;
671 
672         case ACPI_PTYPE2_COUNT:
673             /*
674              * First element is the (Integer) count of elements, including
675              * the count field (the ACPI name is NumElements)
676              */
677             Status = AcpiNsCheckObjectType (Info, SubElements,
678                 ACPI_RTYPE_INTEGER, 0);
679             if (ACPI_FAILURE (Status))
680             {
681                 return (Status);
682             }
683 
684             /*
685              * Make sure package is large enough for the Count and is
686              * is as large as the minimum size
687              */
688             ExpectedCount = (UINT32) (*SubElements)->Integer.Value;
689             if (SubPackage->Package.Count < ExpectedCount)
690             {
691                 goto PackageTooSmall;
692             }
693 
694             if (SubPackage->Package.Count < Package->RetInfo.Count1)
695             {
696                 ExpectedCount = Package->RetInfo.Count1;
697                 goto PackageTooSmall;
698             }
699 
700             if (ExpectedCount == 0)
701             {
702                 /*
703                  * Either the NumEntries element was originally zero or it was
704                  * a NULL element and repaired to an Integer of value zero.
705                  * In either case, repair it by setting NumEntries to be the
706                  * actual size of the subpackage.
707                  */
708                 ExpectedCount = SubPackage->Package.Count;
709                 (*SubElements)->Integer.Value = ExpectedCount;
710             }
711 
712             /* Check the type of each subpackage element */
713 
714             Status = AcpiNsCheckPackageElements (Info, (SubElements + 1),
715                 Package->RetInfo.ObjectType1,
716                 (ExpectedCount - 1), 0, 0, 1);
717             if (ACPI_FAILURE (Status))
718             {
719                 return (Status);
720             }
721             break;
722 
723         default: /* Should not get here, type was validated by caller */
724 
725             ACPI_ERROR ((AE_INFO, "Invalid Package type: %X",
726                 Package->RetInfo.Type));
727             return (AE_AML_INTERNAL);
728         }
729 
730         Elements++;
731     }
732 
733     return (AE_OK);
734 
735 
736 PackageTooSmall:
737 
738     /* The subpackage count was smaller than required */
739 
740     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
741         "Return SubPackage[%u] is too small - found %u elements, expected %u",
742         i, SubPackage->Package.Count, ExpectedCount));
743 
744     return (AE_AML_OPERAND_VALUE);
745 }
746 
747 
748 /*******************************************************************************
749  *
750  * FUNCTION:    AcpiNsCustomPackage
751  *
752  * PARAMETERS:  Info                - Method execution information block
753  *              Elements            - Pointer to the package elements array
754  *              Count               - Element count for the package
755  *
756  * RETURN:      Status
757  *
758  * DESCRIPTION: Check a returned package object for the correct count and
759  *              correct type of all sub-objects.
760  *
761  * NOTE: Currently used for the _BIX method only. When needed for two or more
762  * methods, probably a detect/dispatch mechanism will be required.
763  *
764  ******************************************************************************/
765 
766 static ACPI_STATUS
767 AcpiNsCustomPackage (
768     ACPI_EVALUATE_INFO          *Info,
769     ACPI_OPERAND_OBJECT         **Elements,
770     UINT32                      Count)
771 {
772     UINT32                      ExpectedCount;
773     UINT32                      Version;
774     ACPI_STATUS                 Status = AE_OK;
775 
776 
777     ACPI_FUNCTION_NAME (NsCustomPackage);
778 
779 
780     /* Get version number, must be Integer */
781 
782     if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER)
783     {
784         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
785             "Return Package has invalid object type for version number"));
786         return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
787     }
788 
789     Version = (UINT32) (*Elements)->Integer.Value;
790     ExpectedCount = 21;         /* Version 1 */
791 
792     if (Version == 0)
793     {
794         ExpectedCount = 20;     /* Version 0 */
795     }
796 
797     if (Count < ExpectedCount)
798     {
799         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
800             "Return Package is too small - found %u elements, expected %u",
801             Count, ExpectedCount));
802         return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
803     }
804     else if (Count > ExpectedCount)
805     {
806         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
807             "%s: Return Package is larger than needed - "
808             "found %u, expected %u\n",
809             Info->FullPathname, Count, ExpectedCount));
810     }
811 
812     /* Validate all elements of the returned package */
813 
814     Status = AcpiNsCheckPackageElements (Info, Elements,
815         ACPI_RTYPE_INTEGER, 16,
816         ACPI_RTYPE_STRING, 4, 0);
817     if (ACPI_FAILURE (Status))
818     {
819         return_ACPI_STATUS (Status);
820     }
821 
822     /* Version 1 has a single trailing integer */
823 
824     if (Version > 0)
825     {
826         Status = AcpiNsCheckPackageElements (Info, Elements + 20,
827             ACPI_RTYPE_INTEGER, 1, 0, 0, 20);
828     }
829 
830     return_ACPI_STATUS (Status);
831 }
832 
833 
834 /*******************************************************************************
835  *
836  * FUNCTION:    AcpiNsCheckPackageElements
837  *
838  * PARAMETERS:  Info            - Method execution information block
839  *              Elements        - Pointer to the package elements array
840  *              Type1           - Object type for first group
841  *              Count1          - Count for first group
842  *              Type2           - Object type for second group
843  *              Count2          - Count for second group
844  *              StartIndex      - Start of the first group of elements
845  *
846  * RETURN:      Status
847  *
848  * DESCRIPTION: Check that all elements of a package are of the correct object
849  *              type. Supports up to two groups of different object types.
850  *
851  ******************************************************************************/
852 
853 static ACPI_STATUS
854 AcpiNsCheckPackageElements (
855     ACPI_EVALUATE_INFO          *Info,
856     ACPI_OPERAND_OBJECT         **Elements,
857     UINT8                       Type1,
858     UINT32                      Count1,
859     UINT8                       Type2,
860     UINT32                      Count2,
861     UINT32                      StartIndex)
862 {
863     ACPI_OPERAND_OBJECT         **ThisElement = Elements;
864     ACPI_STATUS                 Status;
865     UINT32                      i;
866 
867 
868     ACPI_FUNCTION_TRACE (NsCheckPackageElements);
869 
870     /*
871      * Up to two groups of package elements are supported by the data
872      * structure. All elements in each group must be of the same type.
873      * The second group can have a count of zero.
874      */
875     for (i = 0; i < Count1; i++)
876     {
877         Status = AcpiNsCheckObjectType (Info, ThisElement,
878             Type1, i + StartIndex);
879         if (ACPI_FAILURE (Status))
880         {
881             return_ACPI_STATUS (Status);
882         }
883 
884         ThisElement++;
885     }
886 
887     for (i = 0; i < Count2; i++)
888     {
889         Status = AcpiNsCheckObjectType (Info, ThisElement,
890             Type2, (i + Count1 + StartIndex));
891         if (ACPI_FAILURE (Status))
892         {
893             return_ACPI_STATUS (Status);
894         }
895 
896         ThisElement++;
897     }
898 
899     return_ACPI_STATUS (AE_OK);
900 }
901