rsutils.c revision 249663 
167805Scg/*******************************************************************************
267805Scg *
370711Sobrien * Module Name: rsutils - Utilities for the resource manager
467805Scg *
570711Sobrien ******************************************************************************/
670711Sobrien
770711Sobrien/*
870711Sobrien * Copyright (C) 2000 - 2013, Intel Corp.
967805Scg * 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
45#define __RSUTILS_C__
46
47#include <contrib/dev/acpica/include/acpi.h>
48#include <contrib/dev/acpica/include/accommon.h>
49#include <contrib/dev/acpica/include/acnamesp.h>
50#include <contrib/dev/acpica/include/acresrc.h>
51
52
53#define _COMPONENT          ACPI_RESOURCES
54        ACPI_MODULE_NAME    ("rsutils")
55
56
57/*******************************************************************************
58 *
59 * FUNCTION:    AcpiRsDecodeBitmask
60 *
61 * PARAMETERS:  Mask            - Bitmask to decode
62 *              List            - Where the converted list is returned
63 *
64 * RETURN:      Count of bits set (length of list)
65 *
66 * DESCRIPTION: Convert a bit mask into a list of values
67 *
68 ******************************************************************************/
69
70UINT8
71AcpiRsDecodeBitmask (
72    UINT16                  Mask,
73    UINT8                   *List)
74{
75    UINT8                   i;
76    UINT8                   BitCount;
77
78
79    ACPI_FUNCTION_ENTRY ();
80
81
82    /* Decode the mask bits */
83
84    for (i = 0, BitCount = 0; Mask; i++)
85    {
86        if (Mask & 0x0001)
87        {
88            List[BitCount] = i;
89            BitCount++;
90        }
91
92        Mask >>= 1;
93    }
94
95    return (BitCount);
96}
97
98
99/*******************************************************************************
100 *
101 * FUNCTION:    AcpiRsEncodeBitmask
102 *
103 * PARAMETERS:  List            - List of values to encode
104 *              Count           - Length of list
105 *
106 * RETURN:      Encoded bitmask
107 *
108 * DESCRIPTION: Convert a list of values to an encoded bitmask
109 *
110 ******************************************************************************/
111
112UINT16
113AcpiRsEncodeBitmask (
114    UINT8                   *List,
115    UINT8                   Count)
116{
117    UINT32                  i;
118    UINT16                  Mask;
119
120
121    ACPI_FUNCTION_ENTRY ();
122
123
124    /* Encode the list into a single bitmask */
125
126    for (i = 0, Mask = 0; i < Count; i++)
127    {
128        Mask |= (0x1 << List[i]);
129    }
130
131    return (Mask);
132}
133
134
135/*******************************************************************************
136 *
137 * FUNCTION:    AcpiRsMoveData
138 *
139 * PARAMETERS:  Destination         - Pointer to the destination descriptor
140 *              Source              - Pointer to the source descriptor
141 *              ItemCount           - How many items to move
142 *              MoveType            - Byte width
143 *
144 * RETURN:      None
145 *
146 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
147 *              alignment issues and endian issues if necessary, as configured
148 *              via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
149 *
150 ******************************************************************************/
151
152void
153AcpiRsMoveData (
154    void                    *Destination,
155    void                    *Source,
156    UINT16                  ItemCount,
157    UINT8                   MoveType)
158{
159    UINT32                  i;
160
161
162    ACPI_FUNCTION_ENTRY ();
163
164
165    /* One move per item */
166
167    for (i = 0; i < ItemCount; i++)
168    {
169        switch (MoveType)
170        {
171        /*
172         * For the 8-bit case, we can perform the move all at once
173         * since there are no alignment or endian issues
174         */
175        case ACPI_RSC_MOVE8:
176        case ACPI_RSC_MOVE_GPIO_RES:
177        case ACPI_RSC_MOVE_SERIAL_VEN:
178        case ACPI_RSC_MOVE_SERIAL_RES:
179            ACPI_MEMCPY (Destination, Source, ItemCount);
180            return;
181
182        /*
183         * 16-, 32-, and 64-bit cases must use the move macros that perform
184         * endian conversion and/or accommodate hardware that cannot perform
185         * misaligned memory transfers
186         */
187        case ACPI_RSC_MOVE16:
188        case ACPI_RSC_MOVE_GPIO_PIN:
189            ACPI_MOVE_16_TO_16 (&ACPI_CAST_PTR (UINT16, Destination)[i],
190                                &ACPI_CAST_PTR (UINT16, Source)[i]);
191            break;
192
193        case ACPI_RSC_MOVE32:
194            ACPI_MOVE_32_TO_32 (&ACPI_CAST_PTR (UINT32, Destination)[i],
195                                &ACPI_CAST_PTR (UINT32, Source)[i]);
196            break;
197
198        case ACPI_RSC_MOVE64:
199            ACPI_MOVE_64_TO_64 (&ACPI_CAST_PTR (UINT64, Destination)[i],
200                                &ACPI_CAST_PTR (UINT64, Source)[i]);
201            break;
202
203        default:
204            return;
205        }
206    }
207}
208
209
210/*******************************************************************************
211 *
212 * FUNCTION:    AcpiRsSetResourceLength
213 *
214 * PARAMETERS:  TotalLength         - Length of the AML descriptor, including
215 *                                    the header and length fields.
216 *              Aml                 - Pointer to the raw AML descriptor
217 *
218 * RETURN:      None
219 *
220 * DESCRIPTION: Set the ResourceLength field of an AML
221 *              resource descriptor, both Large and Small descriptors are
222 *              supported automatically. Note: Descriptor Type field must
223 *              be valid.
224 *
225 ******************************************************************************/
226
227void
228AcpiRsSetResourceLength (
229    ACPI_RSDESC_SIZE        TotalLength,
230    AML_RESOURCE            *Aml)
231{
232    ACPI_RS_LENGTH          ResourceLength;
233
234
235    ACPI_FUNCTION_ENTRY ();
236
237
238    /* Length is the total descriptor length minus the header length */
239
240    ResourceLength = (ACPI_RS_LENGTH)
241        (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
242
243    /* Length is stored differently for large and small descriptors */
244
245    if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
246    {
247        /* Large descriptor -- bytes 1-2 contain the 16-bit length */
248
249        ACPI_MOVE_16_TO_16 (&Aml->LargeHeader.ResourceLength, &ResourceLength);
250    }
251    else
252    {
253        /* Small descriptor -- bits 2:0 of byte 0 contain the length */
254
255        Aml->SmallHeader.DescriptorType = (UINT8)
256
257            /* Clear any existing length, preserving descriptor type bits */
258
259            ((Aml->SmallHeader.DescriptorType & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
260
261            | ResourceLength);
262    }
263}
264
265
266/*******************************************************************************
267 *
268 * FUNCTION:    AcpiRsSetResourceHeader
269 *
270 * PARAMETERS:  DescriptorType      - Byte to be inserted as the type
271 *              TotalLength         - Length of the AML descriptor, including
272 *                                    the header and length fields.
273 *              Aml                 - Pointer to the raw AML descriptor
274 *
275 * RETURN:      None
276 *
277 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
278 *              resource descriptor, both Large and Small descriptors are
279 *              supported automatically
280 *
281 ******************************************************************************/
282
283void
284AcpiRsSetResourceHeader (
285    UINT8                   DescriptorType,
286    ACPI_RSDESC_SIZE        TotalLength,
287    AML_RESOURCE            *Aml)
288{
289    ACPI_FUNCTION_ENTRY ();
290
291
292    /* Set the Resource Type */
293
294    Aml->SmallHeader.DescriptorType = DescriptorType;
295
296    /* Set the Resource Length */
297
298    AcpiRsSetResourceLength (TotalLength, Aml);
299}
300
301
302/*******************************************************************************
303 *
304 * FUNCTION:    AcpiRsStrcpy
305 *
306 * PARAMETERS:  Destination         - Pointer to the destination string
307 *              Source              - Pointer to the source string
308 *
309 * RETURN:      String length, including NULL terminator
310 *
311 * DESCRIPTION: Local string copy that returns the string length, saving a
312 *              strcpy followed by a strlen.
313 *
314 ******************************************************************************/
315
316static UINT16
317AcpiRsStrcpy (
318    char                    *Destination,
319    char                    *Source)
320{
321    UINT16                  i;
322
323
324    ACPI_FUNCTION_ENTRY ();
325
326
327    for (i = 0; Source[i]; i++)
328    {
329        Destination[i] = Source[i];
330    }
331
332    Destination[i] = 0;
333
334    /* Return string length including the NULL terminator */
335
336    return ((UINT16) (i + 1));
337}
338
339
340/*******************************************************************************
341 *
342 * FUNCTION:    AcpiRsGetResourceSource
343 *
344 * PARAMETERS:  ResourceLength      - Length field of the descriptor
345 *              MinimumLength       - Minimum length of the descriptor (minus
346 *                                    any optional fields)
347 *              ResourceSource      - Where the ResourceSource is returned
348 *              Aml                 - Pointer to the raw AML descriptor
349 *              StringPtr           - (optional) where to store the actual
350 *                                    ResourceSource string
351 *
352 * RETURN:      Length of the string plus NULL terminator, rounded up to native
353 *              word boundary
354 *
355 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
356 *              to an internal resource descriptor
357 *
358 ******************************************************************************/
359
360ACPI_RS_LENGTH
361AcpiRsGetResourceSource (
362    ACPI_RS_LENGTH          ResourceLength,
363    ACPI_RS_LENGTH          MinimumLength,
364    ACPI_RESOURCE_SOURCE    *ResourceSource,
365    AML_RESOURCE            *Aml,
366    char                    *StringPtr)
367{
368    ACPI_RSDESC_SIZE        TotalLength;
369    UINT8                   *AmlResourceSource;
370
371
372    ACPI_FUNCTION_ENTRY ();
373
374
375    TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
376    AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
377
378    /*
379     * ResourceSource is present if the length of the descriptor is longer than
380     * the minimum length.
381     *
382     * Note: Some resource descriptors will have an additional null, so
383     * we add 1 to the minimum length.
384     */
385    if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
386    {
387        /* Get the ResourceSourceIndex */
388
389        ResourceSource->Index = AmlResourceSource[0];
390
391        ResourceSource->StringPtr = StringPtr;
392        if (!StringPtr)
393        {
394            /*
395             * String destination pointer is not specified; Set the String
396             * pointer to the end of the current ResourceSource structure.
397             */
398            ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
399                sizeof (ACPI_RESOURCE_SOURCE));
400        }
401
402        /*
403         * In order for the Resource length to be a multiple of the native
404         * word, calculate the length of the string (+1 for NULL terminator)
405         * and expand to the next word multiple.
406         *
407         * Zero the entire area of the buffer.
408         */
409        TotalLength = (UINT32) ACPI_STRLEN (
410            ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
411        TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
412
413        ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);
414
415        /* Copy the ResourceSource string to the destination */
416
417        ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
418            ACPI_CAST_PTR (char, &AmlResourceSource[1]));
419
420        return ((ACPI_RS_LENGTH) TotalLength);
421    }
422
423    /* ResourceSource is not present */
424
425    ResourceSource->Index = 0;
426    ResourceSource->StringLength = 0;
427    ResourceSource->StringPtr = NULL;
428    return (0);
429}
430
431
432/*******************************************************************************
433 *
434 * FUNCTION:    AcpiRsSetResourceSource
435 *
436 * PARAMETERS:  Aml                 - Pointer to the raw AML descriptor
437 *              MinimumLength       - Minimum length of the descriptor (minus
438 *                                    any optional fields)
439 *              ResourceSource      - Internal ResourceSource
440
441 *
442 * RETURN:      Total length of the AML descriptor
443 *
444 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
445 *              raw AML resource descriptor
446 *
447 ******************************************************************************/
448
449ACPI_RSDESC_SIZE
450AcpiRsSetResourceSource (
451    AML_RESOURCE            *Aml,
452    ACPI_RS_LENGTH          MinimumLength,
453    ACPI_RESOURCE_SOURCE    *ResourceSource)
454{
455    UINT8                   *AmlResourceSource;
456    ACPI_RSDESC_SIZE        DescriptorLength;
457
458
459    ACPI_FUNCTION_ENTRY ();
460
461
462    DescriptorLength = MinimumLength;
463
464    /* Non-zero string length indicates presence of a ResourceSource */
465
466    if (ResourceSource->StringLength)
467    {
468        /* Point to the end of the AML descriptor */
469
470        AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
471
472        /* Copy the ResourceSourceIndex */
473
474        AmlResourceSource[0] = (UINT8) ResourceSource->Index;
475
476        /* Copy the ResourceSource string */
477
478        ACPI_STRCPY (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
479            ResourceSource->StringPtr);
480
481        /*
482         * Add the length of the string (+ 1 for null terminator) to the
483         * final descriptor length
484         */
485        DescriptorLength += ((ACPI_RSDESC_SIZE) ResourceSource->StringLength + 1);
486    }
487
488    /* Return the new total length of the AML descriptor */
489
490    return (DescriptorLength);
491}
492
493
494/*******************************************************************************
495 *
496 * FUNCTION:    AcpiRsGetPrtMethodData
497 *
498 * PARAMETERS:  Node            - Device node
499 *              RetBuffer       - Pointer to a buffer structure for the
500 *                                results
501 *
502 * RETURN:      Status
503 *
504 * DESCRIPTION: This function is called to get the _PRT value of an object
505 *              contained in an object specified by the handle passed in
506 *
507 *              If the function fails an appropriate status will be returned
508 *              and the contents of the callers buffer is undefined.
509 *
510 ******************************************************************************/
511
512ACPI_STATUS
513AcpiRsGetPrtMethodData (
514    ACPI_NAMESPACE_NODE     *Node,
515    ACPI_BUFFER             *RetBuffer)
516{
517    ACPI_OPERAND_OBJECT     *ObjDesc;
518    ACPI_STATUS             Status;
519
520
521    ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
522
523
524    /* Parameters guaranteed valid by caller */
525
526    /* Execute the method, no parameters */
527
528    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRT,
529                ACPI_BTYPE_PACKAGE, &ObjDesc);
530    if (ACPI_FAILURE (Status))
531    {
532        return_ACPI_STATUS (Status);
533    }
534
535    /*
536     * Create a resource linked list from the byte stream buffer that comes
537     * back from the _CRS method execution.
538     */
539    Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
540
541    /* On exit, we must delete the object returned by EvaluateObject */
542
543    AcpiUtRemoveReference (ObjDesc);
544    return_ACPI_STATUS (Status);
545}
546
547
548/*******************************************************************************
549 *
550 * FUNCTION:    AcpiRsGetCrsMethodData
551 *
552 * PARAMETERS:  Node            - Device node
553 *              RetBuffer       - Pointer to a buffer structure for the
554 *                                results
555 *
556 * RETURN:      Status
557 *
558 * DESCRIPTION: This function is called to get the _CRS value of an object
559 *              contained in an object specified by the handle passed in
560 *
561 *              If the function fails an appropriate status will be returned
562 *              and the contents of the callers buffer is undefined.
563 *
564 ******************************************************************************/
565
566ACPI_STATUS
567AcpiRsGetCrsMethodData (
568    ACPI_NAMESPACE_NODE     *Node,
569    ACPI_BUFFER             *RetBuffer)
570{
571    ACPI_OPERAND_OBJECT     *ObjDesc;
572    ACPI_STATUS             Status;
573
574
575    ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
576
577
578    /* Parameters guaranteed valid by caller */
579
580    /* Execute the method, no parameters */
581
582    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__CRS,
583                ACPI_BTYPE_BUFFER, &ObjDesc);
584    if (ACPI_FAILURE (Status))
585    {
586        return_ACPI_STATUS (Status);
587    }
588
589    /*
590     * Make the call to create a resource linked list from the
591     * byte stream buffer that comes back from the _CRS method
592     * execution.
593     */
594    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
595
596    /* On exit, we must delete the object returned by evaluateObject */
597
598    AcpiUtRemoveReference (ObjDesc);
599    return_ACPI_STATUS (Status);
600}
601
602
603/*******************************************************************************
604 *
605 * FUNCTION:    AcpiRsGetPrsMethodData
606 *
607 * PARAMETERS:  Node            - Device node
608 *              RetBuffer       - Pointer to a buffer structure for the
609 *                                results
610 *
611 * RETURN:      Status
612 *
613 * DESCRIPTION: This function is called to get the _PRS value of an object
614 *              contained in an object specified by the handle passed in
615 *
616 *              If the function fails an appropriate status will be returned
617 *              and the contents of the callers buffer is undefined.
618 *
619 ******************************************************************************/
620
621ACPI_STATUS
622AcpiRsGetPrsMethodData (
623    ACPI_NAMESPACE_NODE     *Node,
624    ACPI_BUFFER             *RetBuffer)
625{
626    ACPI_OPERAND_OBJECT     *ObjDesc;
627    ACPI_STATUS             Status;
628
629
630    ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
631
632
633    /* Parameters guaranteed valid by caller */
634
635    /* Execute the method, no parameters */
636
637    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRS,
638                ACPI_BTYPE_BUFFER, &ObjDesc);
639    if (ACPI_FAILURE (Status))
640    {
641        return_ACPI_STATUS (Status);
642    }
643
644    /*
645     * Make the call to create a resource linked list from the
646     * byte stream buffer that comes back from the _CRS method
647     * execution.
648     */
649    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
650
651    /* On exit, we must delete the object returned by evaluateObject */
652
653    AcpiUtRemoveReference (ObjDesc);
654    return_ACPI_STATUS (Status);
655}
656
657
658/*******************************************************************************
659 *
660 * FUNCTION:    AcpiRsGetAeiMethodData
661 *
662 * PARAMETERS:  Node            - Device node
663 *              RetBuffer       - Pointer to a buffer structure for the
664 *                                results
665 *
666 * RETURN:      Status
667 *
668 * DESCRIPTION: This function is called to get the _AEI value of an object
669 *              contained in an object specified by the handle passed in
670 *
671 *              If the function fails an appropriate status will be returned
672 *              and the contents of the callers buffer is undefined.
673 *
674 ******************************************************************************/
675
676ACPI_STATUS
677AcpiRsGetAeiMethodData (
678    ACPI_NAMESPACE_NODE     *Node,
679    ACPI_BUFFER             *RetBuffer)
680{
681    ACPI_OPERAND_OBJECT     *ObjDesc;
682    ACPI_STATUS             Status;
683
684
685    ACPI_FUNCTION_TRACE (RsGetAeiMethodData);
686
687
688    /* Parameters guaranteed valid by caller */
689
690    /* Execute the method, no parameters */
691
692    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__AEI,
693                ACPI_BTYPE_BUFFER, &ObjDesc);
694    if (ACPI_FAILURE (Status))
695    {
696        return_ACPI_STATUS (Status);
697    }
698
699    /*
700     * Make the call to create a resource linked list from the
701     * byte stream buffer that comes back from the _CRS method
702     * execution.
703     */
704    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
705
706    /* On exit, we must delete the object returned by evaluateObject */
707
708    AcpiUtRemoveReference (ObjDesc);
709    return_ACPI_STATUS (Status);
710}
711
712
713/*******************************************************************************
714 *
715 * FUNCTION:    AcpiRsGetMethodData
716 *
717 * PARAMETERS:  Handle          - Handle to the containing object
718 *              Path            - Path to method, relative to Handle
719 *              RetBuffer       - Pointer to a buffer structure for the
720 *                                results
721 *
722 * RETURN:      Status
723 *
724 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
725 *              object contained in an object specified by the handle passed in
726 *
727 *              If the function fails an appropriate status will be returned
728 *              and the contents of the callers buffer is undefined.
729 *
730 ******************************************************************************/
731
732ACPI_STATUS
733AcpiRsGetMethodData (
734    ACPI_HANDLE             Handle,
735    char                    *Path,
736    ACPI_BUFFER             *RetBuffer)
737{
738    ACPI_OPERAND_OBJECT     *ObjDesc;
739    ACPI_STATUS             Status;
740
741
742    ACPI_FUNCTION_TRACE (RsGetMethodData);
743
744
745    /* Parameters guaranteed valid by caller */
746
747    /* Execute the method, no parameters */
748
749    Status = AcpiUtEvaluateObject (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle),
750        Path, ACPI_BTYPE_BUFFER, &ObjDesc);
751    if (ACPI_FAILURE (Status))
752    {
753        return_ACPI_STATUS (Status);
754    }
755
756    /*
757     * Make the call to create a resource linked list from the
758     * byte stream buffer that comes back from the method
759     * execution.
760     */
761    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
762
763    /* On exit, we must delete the object returned by EvaluateObject */
764
765    AcpiUtRemoveReference (ObjDesc);
766    return_ACPI_STATUS (Status);
767}
768
769
770/*******************************************************************************
771 *
772 * FUNCTION:    AcpiRsSetSrsMethodData
773 *
774 * PARAMETERS:  Node            - Device node
775 *              InBuffer        - Pointer to a buffer structure of the
776 *                                parameter
777 *
778 * RETURN:      Status
779 *
780 * DESCRIPTION: This function is called to set the _SRS of an object contained
781 *              in an object specified by the handle passed in
782 *
783 *              If the function fails an appropriate status will be returned
784 *              and the contents of the callers buffer is undefined.
785 *
786 * Note: Parameters guaranteed valid by caller
787 *
788 ******************************************************************************/
789
790ACPI_STATUS
791AcpiRsSetSrsMethodData (
792    ACPI_NAMESPACE_NODE     *Node,
793    ACPI_BUFFER             *InBuffer)
794{
795    ACPI_EVALUATE_INFO      *Info;
796    ACPI_OPERAND_OBJECT     *Args[2];
797    ACPI_STATUS             Status;
798    ACPI_BUFFER             Buffer;
799
800
801    ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
802
803
804    /* Allocate and initialize the evaluation information block */
805
806    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
807    if (!Info)
808    {
809        return_ACPI_STATUS (AE_NO_MEMORY);
810    }
811
812    Info->PrefixNode = Node;
813    Info->RelativePathname = METHOD_NAME__SRS;
814    Info->Parameters = Args;
815    Info->Flags = ACPI_IGNORE_RETURN_VALUE;
816
817    /*
818     * The InBuffer parameter will point to a linked list of
819     * resource parameters. It needs to be formatted into a
820     * byte stream to be sent in as an input parameter to _SRS
821     *
822     * Convert the linked list into a byte stream
823     */
824    Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
825    Status = AcpiRsCreateAmlResources (InBuffer->Pointer, &Buffer);
826    if (ACPI_FAILURE (Status))
827    {
828        goto Cleanup;
829    }
830
831    /* Create and initialize the method parameter object */
832
833    Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
834    if (!Args[0])
835    {
836        /*
837         * Must free the buffer allocated above (otherwise it is freed
838         * later)
839         */
840        ACPI_FREE (Buffer.Pointer);
841        Status = AE_NO_MEMORY;
842        goto Cleanup;
843    }
844
845    Args[0]->Buffer.Length  = (UINT32) Buffer.Length;
846    Args[0]->Buffer.Pointer = Buffer.Pointer;
847    Args[0]->Common.Flags   = AOPOBJ_DATA_VALID;
848    Args[1] = NULL;
849
850    /* Execute the method, no return value is expected */
851
852    Status = AcpiNsEvaluate (Info);
853
854    /* Clean up and return the status from AcpiNsEvaluate */
855
856    AcpiUtRemoveReference (Args[0]);
857
858Cleanup:
859    ACPI_FREE (Info);
860    return_ACPI_STATUS (Status);
861}
862