rsutils.c revision 306536 
1/*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions, and the following disclaimer,
16 *    without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 *    substantially similar to the "NO WARRANTY" disclaimer below
19 *    ("Disclaimer") and any redistribution must be conditioned upon
20 *    including a substantially similar Disclaimer requirement for further
21 *    binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 *    of any contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <contrib/dev/acpica/include/acpi.h>
45#include <contrib/dev/acpica/include/accommon.h>
46#include <contrib/dev/acpica/include/acnamesp.h>
47#include <contrib/dev/acpica/include/acresrc.h>
48
49
50#define _COMPONENT          ACPI_RESOURCES
51        ACPI_MODULE_NAME    ("rsutils")
52
53
54/*******************************************************************************
55 *
56 * FUNCTION:    AcpiRsDecodeBitmask
57 *
58 * PARAMETERS:  Mask            - Bitmask to decode
59 *              List            - Where the converted list is returned
60 *
61 * RETURN:      Count of bits set (length of list)
62 *
63 * DESCRIPTION: Convert a bit mask into a list of values
64 *
65 ******************************************************************************/
66
67UINT8
68AcpiRsDecodeBitmask (
69    UINT16                  Mask,
70    UINT8                   *List)
71{
72    UINT8                   i;
73    UINT8                   BitCount;
74
75
76    ACPI_FUNCTION_ENTRY ();
77
78
79    /* Decode the mask bits */
80
81    for (i = 0, BitCount = 0; Mask; i++)
82    {
83        if (Mask & 0x0001)
84        {
85            List[BitCount] = i;
86            BitCount++;
87        }
88
89        Mask >>= 1;
90    }
91
92    return (BitCount);
93}
94
95
96/*******************************************************************************
97 *
98 * FUNCTION:    AcpiRsEncodeBitmask
99 *
100 * PARAMETERS:  List            - List of values to encode
101 *              Count           - Length of list
102 *
103 * RETURN:      Encoded bitmask
104 *
105 * DESCRIPTION: Convert a list of values to an encoded bitmask
106 *
107 ******************************************************************************/
108
109UINT16
110AcpiRsEncodeBitmask (
111    UINT8                   *List,
112    UINT8                   Count)
113{
114    UINT32                  i;
115    UINT16                  Mask;
116
117
118    ACPI_FUNCTION_ENTRY ();
119
120
121    /* Encode the list into a single bitmask */
122
123    for (i = 0, Mask = 0; i < Count; i++)
124    {
125        Mask |= (0x1 << List[i]);
126    }
127
128    return (Mask);
129}
130
131
132/*******************************************************************************
133 *
134 * FUNCTION:    AcpiRsMoveData
135 *
136 * PARAMETERS:  Destination         - Pointer to the destination descriptor
137 *              Source              - Pointer to the source descriptor
138 *              ItemCount           - How many items to move
139 *              MoveType            - Byte width
140 *
141 * RETURN:      None
142 *
143 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
144 *              alignment issues and endian issues if necessary, as configured
145 *              via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
146 *
147 ******************************************************************************/
148
149void
150AcpiRsMoveData (
151    void                    *Destination,
152    void                    *Source,
153    UINT16                  ItemCount,
154    UINT8                   MoveType)
155{
156    UINT32                  i;
157
158
159    ACPI_FUNCTION_ENTRY ();
160
161
162    /* One move per item */
163
164    for (i = 0; i < ItemCount; i++)
165    {
166        switch (MoveType)
167        {
168        /*
169         * For the 8-bit case, we can perform the move all at once
170         * since there are no alignment or endian issues
171         */
172        case ACPI_RSC_MOVE8:
173        case ACPI_RSC_MOVE_GPIO_RES:
174        case ACPI_RSC_MOVE_SERIAL_VEN:
175        case ACPI_RSC_MOVE_SERIAL_RES:
176
177            memcpy (Destination, Source, ItemCount);
178            return;
179
180        /*
181         * 16-, 32-, and 64-bit cases must use the move macros that perform
182         * endian conversion and/or accommodate hardware that cannot perform
183         * misaligned memory transfers
184         */
185        case ACPI_RSC_MOVE16:
186        case ACPI_RSC_MOVE_GPIO_PIN:
187
188            ACPI_MOVE_16_TO_16 (
189                &ACPI_CAST_PTR (UINT16, Destination)[i],
190                &ACPI_CAST_PTR (UINT16, Source)[i]);
191            break;
192
193        case ACPI_RSC_MOVE32:
194
195            ACPI_MOVE_32_TO_32 (
196                &ACPI_CAST_PTR (UINT32, Destination)[i],
197                &ACPI_CAST_PTR (UINT32, Source)[i]);
198            break;
199
200        case ACPI_RSC_MOVE64:
201
202            ACPI_MOVE_64_TO_64 (
203                &ACPI_CAST_PTR (UINT64, Destination)[i],
204                &ACPI_CAST_PTR (UINT64, Source)[i]);
205            break;
206
207        default:
208
209            return;
210        }
211    }
212}
213
214
215/*******************************************************************************
216 *
217 * FUNCTION:    AcpiRsSetResourceLength
218 *
219 * PARAMETERS:  TotalLength         - Length of the AML descriptor, including
220 *                                    the header and length fields.
221 *              Aml                 - Pointer to the raw AML descriptor
222 *
223 * RETURN:      None
224 *
225 * DESCRIPTION: Set the ResourceLength field of an AML
226 *              resource descriptor, both Large and Small descriptors are
227 *              supported automatically. Note: Descriptor Type field must
228 *              be valid.
229 *
230 ******************************************************************************/
231
232void
233AcpiRsSetResourceLength (
234    ACPI_RSDESC_SIZE        TotalLength,
235    AML_RESOURCE            *Aml)
236{
237    ACPI_RS_LENGTH          ResourceLength;
238
239
240    ACPI_FUNCTION_ENTRY ();
241
242
243    /* Length is the total descriptor length minus the header length */
244
245    ResourceLength = (ACPI_RS_LENGTH)
246        (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
247
248    /* Length is stored differently for large and small descriptors */
249
250    if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
251    {
252        /* Large descriptor -- bytes 1-2 contain the 16-bit length */
253
254        ACPI_MOVE_16_TO_16 (
255            &Aml->LargeHeader.ResourceLength, &ResourceLength);
256    }
257    else
258    {
259        /*
260         * Small descriptor -- bits 2:0 of byte 0 contain the length
261         * Clear any existing length, preserving descriptor type bits
262         */
263        Aml->SmallHeader.DescriptorType = (UINT8)
264            ((Aml->SmallHeader.DescriptorType &
265                ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
266            | ResourceLength);
267    }
268}
269
270
271/*******************************************************************************
272 *
273 * FUNCTION:    AcpiRsSetResourceHeader
274 *
275 * PARAMETERS:  DescriptorType      - Byte to be inserted as the type
276 *              TotalLength         - Length of the AML descriptor, including
277 *                                    the header and length fields.
278 *              Aml                 - Pointer to the raw AML descriptor
279 *
280 * RETURN:      None
281 *
282 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
283 *              resource descriptor, both Large and Small descriptors are
284 *              supported automatically
285 *
286 ******************************************************************************/
287
288void
289AcpiRsSetResourceHeader (
290    UINT8                   DescriptorType,
291    ACPI_RSDESC_SIZE        TotalLength,
292    AML_RESOURCE            *Aml)
293{
294    ACPI_FUNCTION_ENTRY ();
295
296
297    /* Set the Resource Type */
298
299    Aml->SmallHeader.DescriptorType = DescriptorType;
300
301    /* Set the Resource Length */
302
303    AcpiRsSetResourceLength (TotalLength, Aml);
304}
305
306
307/*******************************************************************************
308 *
309 * FUNCTION:    AcpiRsStrcpy
310 *
311 * PARAMETERS:  Destination         - Pointer to the destination string
312 *              Source              - Pointer to the source string
313 *
314 * RETURN:      String length, including NULL terminator
315 *
316 * DESCRIPTION: Local string copy that returns the string length, saving a
317 *              strcpy followed by a strlen.
318 *
319 ******************************************************************************/
320
321static UINT16
322AcpiRsStrcpy (
323    char                    *Destination,
324    char                    *Source)
325{
326    UINT16                  i;
327
328
329    ACPI_FUNCTION_ENTRY ();
330
331
332    for (i = 0; Source[i]; i++)
333    {
334        Destination[i] = Source[i];
335    }
336
337    Destination[i] = 0;
338
339    /* Return string length including the NULL terminator */
340
341    return ((UINT16) (i + 1));
342}
343
344
345/*******************************************************************************
346 *
347 * FUNCTION:    AcpiRsGetResourceSource
348 *
349 * PARAMETERS:  ResourceLength      - Length field of the descriptor
350 *              MinimumLength       - Minimum length of the descriptor (minus
351 *                                    any optional fields)
352 *              ResourceSource      - Where the ResourceSource is returned
353 *              Aml                 - Pointer to the raw AML descriptor
354 *              StringPtr           - (optional) where to store the actual
355 *                                    ResourceSource string
356 *
357 * RETURN:      Length of the string plus NULL terminator, rounded up to native
358 *              word boundary
359 *
360 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
361 *              to an internal resource descriptor
362 *
363 ******************************************************************************/
364
365ACPI_RS_LENGTH
366AcpiRsGetResourceSource (
367    ACPI_RS_LENGTH          ResourceLength,
368    ACPI_RS_LENGTH          MinimumLength,
369    ACPI_RESOURCE_SOURCE    *ResourceSource,
370    AML_RESOURCE            *Aml,
371    char                    *StringPtr)
372{
373    ACPI_RSDESC_SIZE        TotalLength;
374    UINT8                   *AmlResourceSource;
375
376
377    ACPI_FUNCTION_ENTRY ();
378
379
380    TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
381    AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
382
383    /*
384     * ResourceSource is present if the length of the descriptor is longer
385     * than the minimum length.
386     *
387     * Note: Some resource descriptors will have an additional null, so
388     * we add 1 to the minimum length.
389     */
390    if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
391    {
392        /* Get the ResourceSourceIndex */
393
394        ResourceSource->Index = AmlResourceSource[0];
395
396        ResourceSource->StringPtr = StringPtr;
397        if (!StringPtr)
398        {
399            /*
400             * String destination pointer is not specified; Set the String
401             * pointer to the end of the current ResourceSource structure.
402             */
403            ResourceSource->StringPtr = ACPI_ADD_PTR (
404                char, ResourceSource, sizeof (ACPI_RESOURCE_SOURCE));
405        }
406
407        /*
408         * In order for the Resource length to be a multiple of the native
409         * word, calculate the length of the string (+1 for NULL terminator)
410         * and expand to the next word multiple.
411         *
412         * Zero the entire area of the buffer.
413         */
414        TotalLength = (UINT32) strlen (
415            ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
416
417        TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
418
419        memset (ResourceSource->StringPtr, 0, TotalLength);
420
421        /* Copy the ResourceSource string to the destination */
422
423        ResourceSource->StringLength = AcpiRsStrcpy (
424            ResourceSource->StringPtr,
425            ACPI_CAST_PTR (char, &AmlResourceSource[1]));
426
427        return ((ACPI_RS_LENGTH) TotalLength);
428    }
429
430    /* ResourceSource is not present */
431
432    ResourceSource->Index = 0;
433    ResourceSource->StringLength = 0;
434    ResourceSource->StringPtr = NULL;
435    return (0);
436}
437
438
439/*******************************************************************************
440 *
441 * FUNCTION:    AcpiRsSetResourceSource
442 *
443 * PARAMETERS:  Aml                 - Pointer to the raw AML descriptor
444 *              MinimumLength       - Minimum length of the descriptor (minus
445 *                                    any optional fields)
446 *              ResourceSource      - Internal ResourceSource
447
448 *
449 * RETURN:      Total length of the AML descriptor
450 *
451 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
452 *              raw AML resource descriptor
453 *
454 ******************************************************************************/
455
456ACPI_RSDESC_SIZE
457AcpiRsSetResourceSource (
458    AML_RESOURCE            *Aml,
459    ACPI_RS_LENGTH          MinimumLength,
460    ACPI_RESOURCE_SOURCE    *ResourceSource)
461{
462    UINT8                   *AmlResourceSource;
463    ACPI_RSDESC_SIZE        DescriptorLength;
464
465
466    ACPI_FUNCTION_ENTRY ();
467
468
469    DescriptorLength = MinimumLength;
470
471    /* Non-zero string length indicates presence of a ResourceSource */
472
473    if (ResourceSource->StringLength)
474    {
475        /* Point to the end of the AML descriptor */
476
477        AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
478
479        /* Copy the ResourceSourceIndex */
480
481        AmlResourceSource[0] = (UINT8) ResourceSource->Index;
482
483        /* Copy the ResourceSource string */
484
485        strcpy (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
486            ResourceSource->StringPtr);
487
488        /*
489         * Add the length of the string (+ 1 for null terminator) to the
490         * final descriptor length
491         */
492        DescriptorLength += ((ACPI_RSDESC_SIZE)
493            ResourceSource->StringLength + 1);
494    }
495
496    /* Return the new total length of the AML descriptor */
497
498    return (DescriptorLength);
499}
500
501
502/*******************************************************************************
503 *
504 * FUNCTION:    AcpiRsGetPrtMethodData
505 *
506 * PARAMETERS:  Node            - Device node
507 *              RetBuffer       - Pointer to a buffer structure for the
508 *                                results
509 *
510 * RETURN:      Status
511 *
512 * DESCRIPTION: This function is called to get the _PRT value of an object
513 *              contained in an object specified by the handle passed in
514 *
515 *              If the function fails an appropriate status will be returned
516 *              and the contents of the callers buffer is undefined.
517 *
518 ******************************************************************************/
519
520ACPI_STATUS
521AcpiRsGetPrtMethodData (
522    ACPI_NAMESPACE_NODE     *Node,
523    ACPI_BUFFER             *RetBuffer)
524{
525    ACPI_OPERAND_OBJECT     *ObjDesc;
526    ACPI_STATUS             Status;
527
528
529    ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
530
531
532    /* Parameters guaranteed valid by caller */
533
534    /* Execute the method, no parameters */
535
536    Status = AcpiUtEvaluateObject (
537        Node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE, &ObjDesc);
538    if (ACPI_FAILURE (Status))
539    {
540        return_ACPI_STATUS (Status);
541    }
542
543    /*
544     * Create a resource linked list from the byte stream buffer that comes
545     * back from the _CRS method execution.
546     */
547    Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
548
549    /* On exit, we must delete the object returned by EvaluateObject */
550
551    AcpiUtRemoveReference (ObjDesc);
552    return_ACPI_STATUS (Status);
553}
554
555
556/*******************************************************************************
557 *
558 * FUNCTION:    AcpiRsGetCrsMethodData
559 *
560 * PARAMETERS:  Node            - Device node
561 *              RetBuffer       - Pointer to a buffer structure for the
562 *                                results
563 *
564 * RETURN:      Status
565 *
566 * DESCRIPTION: This function is called to get the _CRS value of an object
567 *              contained in an object specified by the handle passed in
568 *
569 *              If the function fails an appropriate status will be returned
570 *              and the contents of the callers buffer is undefined.
571 *
572 ******************************************************************************/
573
574ACPI_STATUS
575AcpiRsGetCrsMethodData (
576    ACPI_NAMESPACE_NODE     *Node,
577    ACPI_BUFFER             *RetBuffer)
578{
579    ACPI_OPERAND_OBJECT     *ObjDesc;
580    ACPI_STATUS             Status;
581
582
583    ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
584
585
586    /* Parameters guaranteed valid by caller */
587
588    /* Execute the method, no parameters */
589
590    Status = AcpiUtEvaluateObject (
591        Node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER, &ObjDesc);
592    if (ACPI_FAILURE (Status))
593    {
594        return_ACPI_STATUS (Status);
595    }
596
597    /*
598     * Make the call to create a resource linked list from the
599     * byte stream buffer that comes back from the _CRS method
600     * execution.
601     */
602    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
603
604    /* On exit, we must delete the object returned by evaluateObject */
605
606    AcpiUtRemoveReference (ObjDesc);
607    return_ACPI_STATUS (Status);
608}
609
610
611/*******************************************************************************
612 *
613 * FUNCTION:    AcpiRsGetPrsMethodData
614 *
615 * PARAMETERS:  Node            - Device node
616 *              RetBuffer       - Pointer to a buffer structure for the
617 *                                results
618 *
619 * RETURN:      Status
620 *
621 * DESCRIPTION: This function is called to get the _PRS value of an object
622 *              contained in an object specified by the handle passed in
623 *
624 *              If the function fails an appropriate status will be returned
625 *              and the contents of the callers buffer is undefined.
626 *
627 ******************************************************************************/
628
629ACPI_STATUS
630AcpiRsGetPrsMethodData (
631    ACPI_NAMESPACE_NODE     *Node,
632    ACPI_BUFFER             *RetBuffer)
633{
634    ACPI_OPERAND_OBJECT     *ObjDesc;
635    ACPI_STATUS             Status;
636
637
638    ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
639
640
641    /* Parameters guaranteed valid by caller */
642
643    /* Execute the method, no parameters */
644
645    Status = AcpiUtEvaluateObject (
646        Node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER, &ObjDesc);
647    if (ACPI_FAILURE (Status))
648    {
649        return_ACPI_STATUS (Status);
650    }
651
652    /*
653     * Make the call to create a resource linked list from the
654     * byte stream buffer that comes back from the _CRS method
655     * execution.
656     */
657    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
658
659    /* On exit, we must delete the object returned by evaluateObject */
660
661    AcpiUtRemoveReference (ObjDesc);
662    return_ACPI_STATUS (Status);
663}
664
665
666/*******************************************************************************
667 *
668 * FUNCTION:    AcpiRsGetAeiMethodData
669 *
670 * PARAMETERS:  Node            - Device node
671 *              RetBuffer       - Pointer to a buffer structure for the
672 *                                results
673 *
674 * RETURN:      Status
675 *
676 * DESCRIPTION: This function is called to get the _AEI value of an object
677 *              contained in an object specified by the handle passed in
678 *
679 *              If the function fails an appropriate status will be returned
680 *              and the contents of the callers buffer is undefined.
681 *
682 ******************************************************************************/
683
684ACPI_STATUS
685AcpiRsGetAeiMethodData (
686    ACPI_NAMESPACE_NODE     *Node,
687    ACPI_BUFFER             *RetBuffer)
688{
689    ACPI_OPERAND_OBJECT     *ObjDesc;
690    ACPI_STATUS             Status;
691
692
693    ACPI_FUNCTION_TRACE (RsGetAeiMethodData);
694
695
696    /* Parameters guaranteed valid by caller */
697
698    /* Execute the method, no parameters */
699
700    Status = AcpiUtEvaluateObject (
701        Node, METHOD_NAME__AEI, ACPI_BTYPE_BUFFER, &ObjDesc);
702    if (ACPI_FAILURE (Status))
703    {
704        return_ACPI_STATUS (Status);
705    }
706
707    /*
708     * Make the call to create a resource linked list from the
709     * byte stream buffer that comes back from the _CRS method
710     * execution.
711     */
712    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
713
714    /* On exit, we must delete the object returned by evaluateObject */
715
716    AcpiUtRemoveReference (ObjDesc);
717    return_ACPI_STATUS (Status);
718}
719
720
721/*******************************************************************************
722 *
723 * FUNCTION:    AcpiRsGetMethodData
724 *
725 * PARAMETERS:  Handle          - Handle to the containing object
726 *              Path            - Path to method, relative to Handle
727 *              RetBuffer       - Pointer to a buffer structure for the
728 *                                results
729 *
730 * RETURN:      Status
731 *
732 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
733 *              object contained in an object specified by the handle passed in
734 *
735 *              If the function fails an appropriate status will be returned
736 *              and the contents of the callers buffer is undefined.
737 *
738 ******************************************************************************/
739
740ACPI_STATUS
741AcpiRsGetMethodData (
742    ACPI_HANDLE             Handle,
743    const char              *Path,
744    ACPI_BUFFER             *RetBuffer)
745{
746    ACPI_OPERAND_OBJECT     *ObjDesc;
747    ACPI_STATUS             Status;
748
749
750    ACPI_FUNCTION_TRACE (RsGetMethodData);
751
752
753    /* Parameters guaranteed valid by caller */
754
755    /* Execute the method, no parameters */
756
757    Status = AcpiUtEvaluateObject (
758        ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle),
759        Path, ACPI_BTYPE_BUFFER, &ObjDesc);
760    if (ACPI_FAILURE (Status))
761    {
762        return_ACPI_STATUS (Status);
763    }
764
765    /*
766     * Make the call to create a resource linked list from the
767     * byte stream buffer that comes back from the method
768     * execution.
769     */
770    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
771
772    /* On exit, we must delete the object returned by EvaluateObject */
773
774    AcpiUtRemoveReference (ObjDesc);
775    return_ACPI_STATUS (Status);
776}
777
778
779/*******************************************************************************
780 *
781 * FUNCTION:    AcpiRsSetSrsMethodData
782 *
783 * PARAMETERS:  Node            - Device node
784 *              InBuffer        - Pointer to a buffer structure of the
785 *                                parameter
786 *
787 * RETURN:      Status
788 *
789 * DESCRIPTION: This function is called to set the _SRS of an object contained
790 *              in an object specified by the handle passed in
791 *
792 *              If the function fails an appropriate status will be returned
793 *              and the contents of the callers buffer is undefined.
794 *
795 * Note: Parameters guaranteed valid by caller
796 *
797 ******************************************************************************/
798
799ACPI_STATUS
800AcpiRsSetSrsMethodData (
801    ACPI_NAMESPACE_NODE     *Node,
802    ACPI_BUFFER             *InBuffer)
803{
804    ACPI_EVALUATE_INFO      *Info;
805    ACPI_OPERAND_OBJECT     *Args[2];
806    ACPI_STATUS             Status;
807    ACPI_BUFFER             Buffer;
808
809
810    ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
811
812
813    /* Allocate and initialize the evaluation information block */
814
815    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
816    if (!Info)
817    {
818        return_ACPI_STATUS (AE_NO_MEMORY);
819    }
820
821    Info->PrefixNode = Node;
822    Info->RelativePathname = METHOD_NAME__SRS;
823    Info->Parameters = Args;
824    Info->Flags = ACPI_IGNORE_RETURN_VALUE;
825
826    /*
827     * The InBuffer parameter will point to a linked list of
828     * resource parameters. It needs to be formatted into a
829     * byte stream to be sent in as an input parameter to _SRS
830     *
831     * Convert the linked list into a byte stream
832     */
833    Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
834    Status = AcpiRsCreateAmlResources (InBuffer, &Buffer);
835    if (ACPI_FAILURE (Status))
836    {
837        goto Cleanup;
838    }
839
840    /* Create and initialize the method parameter object */
841
842    Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
843    if (!Args[0])
844    {
845        /*
846         * Must free the buffer allocated above (otherwise it is freed
847         * later)
848         */
849        ACPI_FREE (Buffer.Pointer);
850        Status = AE_NO_MEMORY;
851        goto Cleanup;
852    }
853
854    Args[0]->Buffer.Length  = (UINT32) Buffer.Length;
855    Args[0]->Buffer.Pointer = Buffer.Pointer;
856    Args[0]->Common.Flags   = AOPOBJ_DATA_VALID;
857    Args[1] = NULL;
858
859    /* Execute the method, no return value is expected */
860
861    Status = AcpiNsEvaluate (Info);
862
863    /* Clean up and return the status from AcpiNsEvaluate */
864
865    AcpiUtRemoveReference (Args[0]);
866
867Cleanup:
868    ACPI_FREE (Info);
869    return_ACPI_STATUS (Status);
870}
871