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[reactos.git] / reactos / drivers / bus / acpi / acpica / resources / rsutils.c
1 /*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2015, 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 "acpi.h"
45 #include "accommon.h"
46 #include "acnamesp.h"
47 #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
67 UINT8
68 AcpiRsDecodeBitmask (
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
109 UINT16
110 AcpiRsEncodeBitmask (
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
149 void
150 AcpiRsMoveData (
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
232 void
233 AcpiRsSetResourceLength (
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
288 void
289 AcpiRsSetResourceHeader (
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
321 static UINT16
322 AcpiRsStrcpy (
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
365 ACPI_RS_LENGTH
366 AcpiRsGetResourceSource (
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
456 ACPI_RSDESC_SIZE
457 AcpiRsSetResourceSource (
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
520 ACPI_STATUS
521 AcpiRsGetPrtMethodData (
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
574 ACPI_STATUS
575 AcpiRsGetCrsMethodData (
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
629 ACPI_STATUS
630 AcpiRsGetPrsMethodData (
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
684 ACPI_STATUS
685 AcpiRsGetAeiMethodData (
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
740 ACPI_STATUS
741 AcpiRsGetMethodData (
742 ACPI_HANDLE Handle,
743 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
799 ACPI_STATUS
800 AcpiRsSetSrsMethodData (
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
867 Cleanup:
868 ACPI_FREE (Info);
869 return_ACPI_STATUS (Status);
870 }
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