1 /*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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
AcpiRsDecodeBitmask(UINT16 Mask,UINT8 * List)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
AcpiRsEncodeBitmask(UINT8 * List,UINT8 Count)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
AcpiRsMoveData(void * Destination,void * Source,UINT16 ItemCount,UINT8 MoveType)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 ACPI_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 (&ACPI_CAST_PTR (UINT16, Destination)[i],
189 &ACPI_CAST_PTR (UINT16, Source)[i]);
190 break;
191
192 case ACPI_RSC_MOVE32:
193
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
200 ACPI_MOVE_64_TO_64 (&ACPI_CAST_PTR (UINT64, Destination)[i],
201 &ACPI_CAST_PTR (UINT64, Source)[i]);
202 break;
203
204 default:
205
206 return;
207 }
208 }
209 }
210
211
212 /*******************************************************************************
213 *
214 * FUNCTION: AcpiRsSetResourceLength
215 *
216 * PARAMETERS: TotalLength - Length of the AML descriptor, including
217 * the header and length fields.
218 * Aml - Pointer to the raw AML descriptor
219 *
220 * RETURN: None
221 *
222 * DESCRIPTION: Set the ResourceLength field of an AML
223 * resource descriptor, both Large and Small descriptors are
224 * supported automatically. Note: Descriptor Type field must
225 * be valid.
226 *
227 ******************************************************************************/
228
229 void
AcpiRsSetResourceLength(ACPI_RSDESC_SIZE TotalLength,AML_RESOURCE * Aml)230 AcpiRsSetResourceLength (
231 ACPI_RSDESC_SIZE TotalLength,
232 AML_RESOURCE *Aml)
233 {
234 ACPI_RS_LENGTH ResourceLength;
235
236
237 ACPI_FUNCTION_ENTRY ();
238
239
240 /* Length is the total descriptor length minus the header length */
241
242 ResourceLength = (ACPI_RS_LENGTH)
243 (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
244
245 /* Length is stored differently for large and small descriptors */
246
247 if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
248 {
249 /* Large descriptor -- bytes 1-2 contain the 16-bit length */
250
251 ACPI_MOVE_16_TO_16 (&Aml->LargeHeader.ResourceLength, &ResourceLength);
252 }
253 else
254 {
255 /* Small descriptor -- bits 2:0 of byte 0 contain the length */
256
257 Aml->SmallHeader.DescriptorType = (UINT8)
258
259 /* Clear any existing length, preserving descriptor type bits */
260
261 ((Aml->SmallHeader.DescriptorType & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
262
263 | ResourceLength);
264 }
265 }
266
267
268 /*******************************************************************************
269 *
270 * FUNCTION: AcpiRsSetResourceHeader
271 *
272 * PARAMETERS: DescriptorType - Byte to be inserted as the type
273 * TotalLength - Length of the AML descriptor, including
274 * the header and length fields.
275 * Aml - Pointer to the raw AML descriptor
276 *
277 * RETURN: None
278 *
279 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
280 * resource descriptor, both Large and Small descriptors are
281 * supported automatically
282 *
283 ******************************************************************************/
284
285 void
AcpiRsSetResourceHeader(UINT8 DescriptorType,ACPI_RSDESC_SIZE TotalLength,AML_RESOURCE * Aml)286 AcpiRsSetResourceHeader (
287 UINT8 DescriptorType,
288 ACPI_RSDESC_SIZE TotalLength,
289 AML_RESOURCE *Aml)
290 {
291 ACPI_FUNCTION_ENTRY ();
292
293
294 /* Set the Resource Type */
295
296 Aml->SmallHeader.DescriptorType = DescriptorType;
297
298 /* Set the Resource Length */
299
300 AcpiRsSetResourceLength (TotalLength, Aml);
301 }
302
303
304 /*******************************************************************************
305 *
306 * FUNCTION: AcpiRsStrcpy
307 *
308 * PARAMETERS: Destination - Pointer to the destination string
309 * Source - Pointer to the source string
310 *
311 * RETURN: String length, including NULL terminator
312 *
313 * DESCRIPTION: Local string copy that returns the string length, saving a
314 * strcpy followed by a strlen.
315 *
316 ******************************************************************************/
317
318 static UINT16
AcpiRsStrcpy(char * Destination,char * Source)319 AcpiRsStrcpy (
320 char *Destination,
321 char *Source)
322 {
323 UINT16 i;
324
325
326 ACPI_FUNCTION_ENTRY ();
327
328
329 for (i = 0; Source[i]; i++)
330 {
331 Destination[i] = Source[i];
332 }
333
334 Destination[i] = 0;
335
336 /* Return string length including the NULL terminator */
337
338 return ((UINT16) (i + 1));
339 }
340
341
342 /*******************************************************************************
343 *
344 * FUNCTION: AcpiRsGetResourceSource
345 *
346 * PARAMETERS: ResourceLength - Length field of the descriptor
347 * MinimumLength - Minimum length of the descriptor (minus
348 * any optional fields)
349 * ResourceSource - Where the ResourceSource is returned
350 * Aml - Pointer to the raw AML descriptor
351 * StringPtr - (optional) where to store the actual
352 * ResourceSource string
353 *
354 * RETURN: Length of the string plus NULL terminator, rounded up to native
355 * word boundary
356 *
357 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
358 * to an internal resource descriptor
359 *
360 ******************************************************************************/
361
362 ACPI_RS_LENGTH
AcpiRsGetResourceSource(ACPI_RS_LENGTH ResourceLength,ACPI_RS_LENGTH MinimumLength,ACPI_RESOURCE_SOURCE * ResourceSource,AML_RESOURCE * Aml,char * StringPtr)363 AcpiRsGetResourceSource (
364 ACPI_RS_LENGTH ResourceLength,
365 ACPI_RS_LENGTH MinimumLength,
366 ACPI_RESOURCE_SOURCE *ResourceSource,
367 AML_RESOURCE *Aml,
368 char *StringPtr)
369 {
370 ACPI_RSDESC_SIZE TotalLength;
371 UINT8 *AmlResourceSource;
372
373
374 ACPI_FUNCTION_ENTRY ();
375
376
377 TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
378 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
379
380 /*
381 * ResourceSource is present if the length of the descriptor is longer than
382 * the minimum length.
383 *
384 * Note: Some resource descriptors will have an additional null, so
385 * we add 1 to the minimum length.
386 */
387 if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
388 {
389 /* Get the ResourceSourceIndex */
390
391 ResourceSource->Index = AmlResourceSource[0];
392
393 ResourceSource->StringPtr = StringPtr;
394 if (!StringPtr)
395 {
396 /*
397 * String destination pointer is not specified; Set the String
398 * pointer to the end of the current ResourceSource structure.
399 */
400 ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
401 sizeof (ACPI_RESOURCE_SOURCE));
402 }
403
404 /*
405 * In order for the Resource length to be a multiple of the native
406 * word, calculate the length of the string (+1 for NULL terminator)
407 * and expand to the next word multiple.
408 *
409 * Zero the entire area of the buffer.
410 */
411 TotalLength = (UINT32) ACPI_STRLEN (
412 ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
413 TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
414
415 ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);
416
417 /* Copy the ResourceSource string to the destination */
418
419 ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
420 ACPI_CAST_PTR (char, &AmlResourceSource[1]));
421
422 return ((ACPI_RS_LENGTH) TotalLength);
423 }
424
425 /* ResourceSource is not present */
426
427 ResourceSource->Index = 0;
428 ResourceSource->StringLength = 0;
429 ResourceSource->StringPtr = NULL;
430 return (0);
431 }
432
433
434 /*******************************************************************************
435 *
436 * FUNCTION: AcpiRsSetResourceSource
437 *
438 * PARAMETERS: Aml - Pointer to the raw AML descriptor
439 * MinimumLength - Minimum length of the descriptor (minus
440 * any optional fields)
441 * ResourceSource - Internal ResourceSource
442
443 *
444 * RETURN: Total length of the AML descriptor
445 *
446 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
447 * raw AML resource descriptor
448 *
449 ******************************************************************************/
450
451 ACPI_RSDESC_SIZE
AcpiRsSetResourceSource(AML_RESOURCE * Aml,ACPI_RS_LENGTH MinimumLength,ACPI_RESOURCE_SOURCE * ResourceSource)452 AcpiRsSetResourceSource (
453 AML_RESOURCE *Aml,
454 ACPI_RS_LENGTH MinimumLength,
455 ACPI_RESOURCE_SOURCE *ResourceSource)
456 {
457 UINT8 *AmlResourceSource;
458 ACPI_RSDESC_SIZE DescriptorLength;
459
460
461 ACPI_FUNCTION_ENTRY ();
462
463
464 DescriptorLength = MinimumLength;
465
466 /* Non-zero string length indicates presence of a ResourceSource */
467
468 if (ResourceSource->StringLength)
469 {
470 /* Point to the end of the AML descriptor */
471
472 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
473
474 /* Copy the ResourceSourceIndex */
475
476 AmlResourceSource[0] = (UINT8) ResourceSource->Index;
477
478 /* Copy the ResourceSource string */
479
480 ACPI_STRCPY (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
481 ResourceSource->StringPtr);
482
483 /*
484 * Add the length of the string (+ 1 for null terminator) to the
485 * final descriptor length
486 */
487 DescriptorLength += ((ACPI_RSDESC_SIZE) ResourceSource->StringLength + 1);
488 }
489
490 /* Return the new total length of the AML descriptor */
491
492 return (DescriptorLength);
493 }
494
495
496 /*******************************************************************************
497 *
498 * FUNCTION: AcpiRsGetPrtMethodData
499 *
500 * PARAMETERS: Node - Device node
501 * RetBuffer - Pointer to a buffer structure for the
502 * results
503 *
504 * RETURN: Status
505 *
506 * DESCRIPTION: This function is called to get the _PRT value of an object
507 * contained in an object specified by the handle passed in
508 *
509 * If the function fails an appropriate status will be returned
510 * and the contents of the callers buffer is undefined.
511 *
512 ******************************************************************************/
513
514 ACPI_STATUS
AcpiRsGetPrtMethodData(ACPI_NAMESPACE_NODE * Node,ACPI_BUFFER * RetBuffer)515 AcpiRsGetPrtMethodData (
516 ACPI_NAMESPACE_NODE *Node,
517 ACPI_BUFFER *RetBuffer)
518 {
519 ACPI_OPERAND_OBJECT *ObjDesc;
520 ACPI_STATUS Status;
521
522
523 ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
524
525
526 /* Parameters guaranteed valid by caller */
527
528 /* Execute the method, no parameters */
529
530 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRT,
531 ACPI_BTYPE_PACKAGE, &ObjDesc);
532 if (ACPI_FAILURE (Status))
533 {
534 return_ACPI_STATUS (Status);
535 }
536
537 /*
538 * Create a resource linked list from the byte stream buffer that comes
539 * back from the _CRS method execution.
540 */
541 Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
542
543 /* On exit, we must delete the object returned by EvaluateObject */
544
545 AcpiUtRemoveReference (ObjDesc);
546 return_ACPI_STATUS (Status);
547 }
548
549
550 /*******************************************************************************
551 *
552 * FUNCTION: AcpiRsGetCrsMethodData
553 *
554 * PARAMETERS: Node - Device node
555 * RetBuffer - Pointer to a buffer structure for the
556 * results
557 *
558 * RETURN: Status
559 *
560 * DESCRIPTION: This function is called to get the _CRS value of an object
561 * contained in an object specified by the handle passed in
562 *
563 * If the function fails an appropriate status will be returned
564 * and the contents of the callers buffer is undefined.
565 *
566 ******************************************************************************/
567
568 ACPI_STATUS
AcpiRsGetCrsMethodData(ACPI_NAMESPACE_NODE * Node,ACPI_BUFFER * RetBuffer)569 AcpiRsGetCrsMethodData (
570 ACPI_NAMESPACE_NODE *Node,
571 ACPI_BUFFER *RetBuffer)
572 {
573 ACPI_OPERAND_OBJECT *ObjDesc;
574 ACPI_STATUS Status;
575
576
577 ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
578
579
580 /* Parameters guaranteed valid by caller */
581
582 /* Execute the method, no parameters */
583
584 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__CRS,
585 ACPI_BTYPE_BUFFER, &ObjDesc);
586 if (ACPI_FAILURE (Status))
587 {
588 return_ACPI_STATUS (Status);
589 }
590
591 /*
592 * Make the call to create a resource linked list from the
593 * byte stream buffer that comes back from the _CRS method
594 * execution.
595 */
596 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
597
598 /* On exit, we must delete the object returned by evaluateObject */
599
600 AcpiUtRemoveReference (ObjDesc);
601 return_ACPI_STATUS (Status);
602 }
603
604
605 /*******************************************************************************
606 *
607 * FUNCTION: AcpiRsGetPrsMethodData
608 *
609 * PARAMETERS: Node - Device node
610 * RetBuffer - Pointer to a buffer structure for the
611 * results
612 *
613 * RETURN: Status
614 *
615 * DESCRIPTION: This function is called to get the _PRS value of an object
616 * contained in an object specified by the handle passed in
617 *
618 * If the function fails an appropriate status will be returned
619 * and the contents of the callers buffer is undefined.
620 *
621 ******************************************************************************/
622
623 ACPI_STATUS
AcpiRsGetPrsMethodData(ACPI_NAMESPACE_NODE * Node,ACPI_BUFFER * RetBuffer)624 AcpiRsGetPrsMethodData (
625 ACPI_NAMESPACE_NODE *Node,
626 ACPI_BUFFER *RetBuffer)
627 {
628 ACPI_OPERAND_OBJECT *ObjDesc;
629 ACPI_STATUS Status;
630
631
632 ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
633
634
635 /* Parameters guaranteed valid by caller */
636
637 /* Execute the method, no parameters */
638
639 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRS,
640 ACPI_BTYPE_BUFFER, &ObjDesc);
641 if (ACPI_FAILURE (Status))
642 {
643 return_ACPI_STATUS (Status);
644 }
645
646 /*
647 * Make the call to create a resource linked list from the
648 * byte stream buffer that comes back from the _CRS method
649 * execution.
650 */
651 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
652
653 /* On exit, we must delete the object returned by evaluateObject */
654
655 AcpiUtRemoveReference (ObjDesc);
656 return_ACPI_STATUS (Status);
657 }
658
659
660 /*******************************************************************************
661 *
662 * FUNCTION: AcpiRsGetAeiMethodData
663 *
664 * PARAMETERS: Node - Device node
665 * RetBuffer - Pointer to a buffer structure for the
666 * results
667 *
668 * RETURN: Status
669 *
670 * DESCRIPTION: This function is called to get the _AEI value of an object
671 * contained in an object specified by the handle passed in
672 *
673 * If the function fails an appropriate status will be returned
674 * and the contents of the callers buffer is undefined.
675 *
676 ******************************************************************************/
677
678 ACPI_STATUS
AcpiRsGetAeiMethodData(ACPI_NAMESPACE_NODE * Node,ACPI_BUFFER * RetBuffer)679 AcpiRsGetAeiMethodData (
680 ACPI_NAMESPACE_NODE *Node,
681 ACPI_BUFFER *RetBuffer)
682 {
683 ACPI_OPERAND_OBJECT *ObjDesc;
684 ACPI_STATUS Status;
685
686
687 ACPI_FUNCTION_TRACE (RsGetAeiMethodData);
688
689
690 /* Parameters guaranteed valid by caller */
691
692 /* Execute the method, no parameters */
693
694 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__AEI,
695 ACPI_BTYPE_BUFFER, &ObjDesc);
696 if (ACPI_FAILURE (Status))
697 {
698 return_ACPI_STATUS (Status);
699 }
700
701 /*
702 * Make the call to create a resource linked list from the
703 * byte stream buffer that comes back from the _CRS method
704 * execution.
705 */
706 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
707
708 /* On exit, we must delete the object returned by evaluateObject */
709
710 AcpiUtRemoveReference (ObjDesc);
711 return_ACPI_STATUS (Status);
712 }
713
714
715 /*******************************************************************************
716 *
717 * FUNCTION: AcpiRsGetMethodData
718 *
719 * PARAMETERS: Handle - Handle to the containing object
720 * Path - Path to method, relative to Handle
721 * RetBuffer - Pointer to a buffer structure for the
722 * results
723 *
724 * RETURN: Status
725 *
726 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
727 * object contained in an object specified by the handle passed in
728 *
729 * If the function fails an appropriate status will be returned
730 * and the contents of the callers buffer is undefined.
731 *
732 ******************************************************************************/
733
734 ACPI_STATUS
AcpiRsGetMethodData(ACPI_HANDLE Handle,char * Path,ACPI_BUFFER * RetBuffer)735 AcpiRsGetMethodData (
736 ACPI_HANDLE Handle,
737 char *Path,
738 ACPI_BUFFER *RetBuffer)
739 {
740 ACPI_OPERAND_OBJECT *ObjDesc;
741 ACPI_STATUS Status;
742
743
744 ACPI_FUNCTION_TRACE (RsGetMethodData);
745
746
747 /* Parameters guaranteed valid by caller */
748
749 /* Execute the method, no parameters */
750
751 Status = AcpiUtEvaluateObject (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle),
752 Path, ACPI_BTYPE_BUFFER, &ObjDesc);
753 if (ACPI_FAILURE (Status))
754 {
755 return_ACPI_STATUS (Status);
756 }
757
758 /*
759 * Make the call to create a resource linked list from the
760 * byte stream buffer that comes back from the method
761 * execution.
762 */
763 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
764
765 /* On exit, we must delete the object returned by EvaluateObject */
766
767 AcpiUtRemoveReference (ObjDesc);
768 return_ACPI_STATUS (Status);
769 }
770
771
772 /*******************************************************************************
773 *
774 * FUNCTION: AcpiRsSetSrsMethodData
775 *
776 * PARAMETERS: Node - Device node
777 * InBuffer - Pointer to a buffer structure of the
778 * parameter
779 *
780 * RETURN: Status
781 *
782 * DESCRIPTION: This function is called to set the _SRS of an object contained
783 * in an object specified by the handle passed in
784 *
785 * If the function fails an appropriate status will be returned
786 * and the contents of the callers buffer is undefined.
787 *
788 * Note: Parameters guaranteed valid by caller
789 *
790 ******************************************************************************/
791
792 ACPI_STATUS
AcpiRsSetSrsMethodData(ACPI_NAMESPACE_NODE * Node,ACPI_BUFFER * InBuffer)793 AcpiRsSetSrsMethodData (
794 ACPI_NAMESPACE_NODE *Node,
795 ACPI_BUFFER *InBuffer)
796 {
797 ACPI_EVALUATE_INFO *Info;
798 ACPI_OPERAND_OBJECT *Args[2];
799 ACPI_STATUS Status;
800 ACPI_BUFFER Buffer;
801
802
803 ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
804
805
806 /* Allocate and initialize the evaluation information block */
807
808 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
809 if (!Info)
810 {
811 return_ACPI_STATUS (AE_NO_MEMORY);
812 }
813
814 Info->PrefixNode = Node;
815 Info->RelativePathname = METHOD_NAME__SRS;
816 Info->Parameters = Args;
817 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
818
819 /*
820 * The InBuffer parameter will point to a linked list of
821 * resource parameters. It needs to be formatted into a
822 * byte stream to be sent in as an input parameter to _SRS
823 *
824 * Convert the linked list into a byte stream
825 */
826 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
827 Status = AcpiRsCreateAmlResources (InBuffer, &Buffer);
828 if (ACPI_FAILURE (Status))
829 {
830 goto Cleanup;
831 }
832
833 /* Create and initialize the method parameter object */
834
835 Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
836 if (!Args[0])
837 {
838 /*
839 * Must free the buffer allocated above (otherwise it is freed
840 * later)
841 */
842 ACPI_FREE (Buffer.Pointer);
843 Status = AE_NO_MEMORY;
844 goto Cleanup;
845 }
846
847 Args[0]->Buffer.Length = (UINT32) Buffer.Length;
848 Args[0]->Buffer.Pointer = Buffer.Pointer;
849 Args[0]->Common.Flags = AOPOBJ_DATA_VALID;
850 Args[1] = NULL;
851
852 /* Execute the method, no return value is expected */
853
854 Status = AcpiNsEvaluate (Info);
855
856 /* Clean up and return the status from AcpiNsEvaluate */
857
858 AcpiUtRemoveReference (Args[0]);
859
860 Cleanup:
861 ACPI_FREE (Info);
862 return_ACPI_STATUS (Status);
863 }
864