1 /*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, 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/acpi.h>
45 #include "accommon.h"
46 #include "acnamesp.h"
47 #include "acresrc.h"
48
49 #define _COMPONENT ACPI_RESOURCES
50 ACPI_MODULE_NAME("rsutils")
51
52 /*******************************************************************************
53 *
54 * FUNCTION: acpi_rs_decode_bitmask
55 *
56 * PARAMETERS: mask - Bitmask to decode
57 * list - Where the converted list is returned
58 *
59 * RETURN: Count of bits set (length of list)
60 *
61 * DESCRIPTION: Convert a bit mask into a list of values
62 *
63 ******************************************************************************/
acpi_rs_decode_bitmask(u16 mask,u8 * list)64 u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
65 {
66 u8 i;
67 u8 bit_count;
68
69 ACPI_FUNCTION_ENTRY();
70
71 /* Decode the mask bits */
72
73 for (i = 0, bit_count = 0; mask; i++) {
74 if (mask & 0x0001) {
75 list[bit_count] = i;
76 bit_count++;
77 }
78
79 mask >>= 1;
80 }
81
82 return (bit_count);
83 }
84
85 /*******************************************************************************
86 *
87 * FUNCTION: acpi_rs_encode_bitmask
88 *
89 * PARAMETERS: list - List of values to encode
90 * count - Length of list
91 *
92 * RETURN: Encoded bitmask
93 *
94 * DESCRIPTION: Convert a list of values to an encoded bitmask
95 *
96 ******************************************************************************/
97
acpi_rs_encode_bitmask(u8 * list,u8 count)98 u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
99 {
100 u32 i;
101 u16 mask;
102
103 ACPI_FUNCTION_ENTRY();
104
105 /* Encode the list into a single bitmask */
106
107 for (i = 0, mask = 0; i < count; i++) {
108 mask |= (0x1 << list[i]);
109 }
110
111 return (mask);
112 }
113
114 /*******************************************************************************
115 *
116 * FUNCTION: acpi_rs_move_data
117 *
118 * PARAMETERS: destination - Pointer to the destination descriptor
119 * source - Pointer to the source descriptor
120 * item_count - How many items to move
121 * move_type - Byte width
122 *
123 * RETURN: None
124 *
125 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
126 * alignment issues and endian issues if necessary, as configured
127 * via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
128 *
129 ******************************************************************************/
130
131 void
acpi_rs_move_data(void * destination,void * source,u16 item_count,u8 move_type)132 acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
133 {
134 u32 i;
135
136 ACPI_FUNCTION_ENTRY();
137
138 /* One move per item */
139
140 for (i = 0; i < item_count; i++) {
141 switch (move_type) {
142 /*
143 * For the 8-bit case, we can perform the move all at once
144 * since there are no alignment or endian issues
145 */
146 case ACPI_RSC_MOVE8:
147 case ACPI_RSC_MOVE_GPIO_RES:
148 case ACPI_RSC_MOVE_SERIAL_VEN:
149 case ACPI_RSC_MOVE_SERIAL_RES:
150 ACPI_MEMCPY(destination, source, item_count);
151 return;
152
153 /*
154 * 16-, 32-, and 64-bit cases must use the move macros that perform
155 * endian conversion and/or accommodate hardware that cannot perform
156 * misaligned memory transfers
157 */
158 case ACPI_RSC_MOVE16:
159 case ACPI_RSC_MOVE_GPIO_PIN:
160 ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
161 &ACPI_CAST_PTR(u16, source)[i]);
162 break;
163
164 case ACPI_RSC_MOVE32:
165 ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
166 &ACPI_CAST_PTR(u32, source)[i]);
167 break;
168
169 case ACPI_RSC_MOVE64:
170 ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
171 &ACPI_CAST_PTR(u64, source)[i]);
172 break;
173
174 default:
175 return;
176 }
177 }
178 }
179
180 /*******************************************************************************
181 *
182 * FUNCTION: acpi_rs_set_resource_length
183 *
184 * PARAMETERS: total_length - Length of the AML descriptor, including
185 * the header and length fields.
186 * aml - Pointer to the raw AML descriptor
187 *
188 * RETURN: None
189 *
190 * DESCRIPTION: Set the resource_length field of an AML
191 * resource descriptor, both Large and Small descriptors are
192 * supported automatically. Note: Descriptor Type field must
193 * be valid.
194 *
195 ******************************************************************************/
196
197 void
acpi_rs_set_resource_length(acpi_rsdesc_size total_length,union aml_resource * aml)198 acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
199 union aml_resource *aml)
200 {
201 acpi_rs_length resource_length;
202
203 ACPI_FUNCTION_ENTRY();
204
205 /* Length is the total descriptor length minus the header length */
206
207 resource_length = (acpi_rs_length)
208 (total_length - acpi_ut_get_resource_header_length(aml));
209
210 /* Length is stored differently for large and small descriptors */
211
212 if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
213
214 /* Large descriptor -- bytes 1-2 contain the 16-bit length */
215
216 ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
217 &resource_length);
218 } else {
219 /* Small descriptor -- bits 2:0 of byte 0 contain the length */
220
221 aml->small_header.descriptor_type = (u8)
222
223 /* Clear any existing length, preserving descriptor type bits */
224 ((aml->small_header.
225 descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
226
227 | resource_length);
228 }
229 }
230
231 /*******************************************************************************
232 *
233 * FUNCTION: acpi_rs_set_resource_header
234 *
235 * PARAMETERS: descriptor_type - Byte to be inserted as the type
236 * total_length - Length of the AML descriptor, including
237 * the header and length fields.
238 * aml - Pointer to the raw AML descriptor
239 *
240 * RETURN: None
241 *
242 * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
243 * resource descriptor, both Large and Small descriptors are
244 * supported automatically
245 *
246 ******************************************************************************/
247
248 void
acpi_rs_set_resource_header(u8 descriptor_type,acpi_rsdesc_size total_length,union aml_resource * aml)249 acpi_rs_set_resource_header(u8 descriptor_type,
250 acpi_rsdesc_size total_length,
251 union aml_resource *aml)
252 {
253 ACPI_FUNCTION_ENTRY();
254
255 /* Set the Resource Type */
256
257 aml->small_header.descriptor_type = descriptor_type;
258
259 /* Set the Resource Length */
260
261 acpi_rs_set_resource_length(total_length, aml);
262 }
263
264 /*******************************************************************************
265 *
266 * FUNCTION: acpi_rs_strcpy
267 *
268 * PARAMETERS: destination - Pointer to the destination string
269 * source - Pointer to the source string
270 *
271 * RETURN: String length, including NULL terminator
272 *
273 * DESCRIPTION: Local string copy that returns the string length, saving a
274 * strcpy followed by a strlen.
275 *
276 ******************************************************************************/
277
acpi_rs_strcpy(char * destination,char * source)278 static u16 acpi_rs_strcpy(char *destination, char *source)
279 {
280 u16 i;
281
282 ACPI_FUNCTION_ENTRY();
283
284 for (i = 0; source[i]; i++) {
285 destination[i] = source[i];
286 }
287
288 destination[i] = 0;
289
290 /* Return string length including the NULL terminator */
291
292 return ((u16) (i + 1));
293 }
294
295 /*******************************************************************************
296 *
297 * FUNCTION: acpi_rs_get_resource_source
298 *
299 * PARAMETERS: resource_length - Length field of the descriptor
300 * minimum_length - Minimum length of the descriptor (minus
301 * any optional fields)
302 * resource_source - Where the resource_source is returned
303 * aml - Pointer to the raw AML descriptor
304 * string_ptr - (optional) where to store the actual
305 * resource_source string
306 *
307 * RETURN: Length of the string plus NULL terminator, rounded up to native
308 * word boundary
309 *
310 * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
311 * to an internal resource descriptor
312 *
313 ******************************************************************************/
314
315 acpi_rs_length
acpi_rs_get_resource_source(acpi_rs_length resource_length,acpi_rs_length minimum_length,struct acpi_resource_source * resource_source,union aml_resource * aml,char * string_ptr)316 acpi_rs_get_resource_source(acpi_rs_length resource_length,
317 acpi_rs_length minimum_length,
318 struct acpi_resource_source * resource_source,
319 union aml_resource * aml, char *string_ptr)
320 {
321 acpi_rsdesc_size total_length;
322 u8 *aml_resource_source;
323
324 ACPI_FUNCTION_ENTRY();
325
326 total_length =
327 resource_length + sizeof(struct aml_resource_large_header);
328 aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
329
330 /*
331 * resource_source is present if the length of the descriptor is longer than
332 * the minimum length.
333 *
334 * Note: Some resource descriptors will have an additional null, so
335 * we add 1 to the minimum length.
336 */
337 if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) {
338
339 /* Get the resource_source_index */
340
341 resource_source->index = aml_resource_source[0];
342
343 resource_source->string_ptr = string_ptr;
344 if (!string_ptr) {
345 /*
346 * String destination pointer is not specified; Set the String
347 * pointer to the end of the current resource_source structure.
348 */
349 resource_source->string_ptr =
350 ACPI_ADD_PTR(char, resource_source,
351 sizeof(struct acpi_resource_source));
352 }
353
354 /*
355 * In order for the Resource length to be a multiple of the native
356 * word, calculate the length of the string (+1 for NULL terminator)
357 * and expand to the next word multiple.
358 *
359 * Zero the entire area of the buffer.
360 */
361 total_length =
362 (u32)
363 ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) +
364 1;
365 total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
366
367 ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
368
369 /* Copy the resource_source string to the destination */
370
371 resource_source->string_length =
372 acpi_rs_strcpy(resource_source->string_ptr,
373 ACPI_CAST_PTR(char,
374 &aml_resource_source[1]));
375
376 return ((acpi_rs_length) total_length);
377 }
378
379 /* resource_source is not present */
380
381 resource_source->index = 0;
382 resource_source->string_length = 0;
383 resource_source->string_ptr = NULL;
384 return (0);
385 }
386
387 /*******************************************************************************
388 *
389 * FUNCTION: acpi_rs_set_resource_source
390 *
391 * PARAMETERS: aml - Pointer to the raw AML descriptor
392 * minimum_length - Minimum length of the descriptor (minus
393 * any optional fields)
394 * resource_source - Internal resource_source
395
396 *
397 * RETURN: Total length of the AML descriptor
398 *
399 * DESCRIPTION: Convert an optional resource_source from internal format to a
400 * raw AML resource descriptor
401 *
402 ******************************************************************************/
403
404 acpi_rsdesc_size
acpi_rs_set_resource_source(union aml_resource * aml,acpi_rs_length minimum_length,struct acpi_resource_source * resource_source)405 acpi_rs_set_resource_source(union aml_resource * aml,
406 acpi_rs_length minimum_length,
407 struct acpi_resource_source * resource_source)
408 {
409 u8 *aml_resource_source;
410 acpi_rsdesc_size descriptor_length;
411
412 ACPI_FUNCTION_ENTRY();
413
414 descriptor_length = minimum_length;
415
416 /* Non-zero string length indicates presence of a resource_source */
417
418 if (resource_source->string_length) {
419
420 /* Point to the end of the AML descriptor */
421
422 aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
423
424 /* Copy the resource_source_index */
425
426 aml_resource_source[0] = (u8) resource_source->index;
427
428 /* Copy the resource_source string */
429
430 ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
431 resource_source->string_ptr);
432
433 /*
434 * Add the length of the string (+ 1 for null terminator) to the
435 * final descriptor length
436 */
437 descriptor_length +=
438 ((acpi_rsdesc_size) resource_source->string_length + 1);
439 }
440
441 /* Return the new total length of the AML descriptor */
442
443 return (descriptor_length);
444 }
445
446 /*******************************************************************************
447 *
448 * FUNCTION: acpi_rs_get_prt_method_data
449 *
450 * PARAMETERS: node - Device node
451 * ret_buffer - Pointer to a buffer structure for the
452 * results
453 *
454 * RETURN: Status
455 *
456 * DESCRIPTION: This function is called to get the _PRT value of an object
457 * contained in an object specified by the handle passed in
458 *
459 * If the function fails an appropriate status will be returned
460 * and the contents of the callers buffer is undefined.
461 *
462 ******************************************************************************/
463
464 acpi_status
acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,struct acpi_buffer * ret_buffer)465 acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,
466 struct acpi_buffer * ret_buffer)
467 {
468 union acpi_operand_object *obj_desc;
469 acpi_status status;
470
471 ACPI_FUNCTION_TRACE(rs_get_prt_method_data);
472
473 /* Parameters guaranteed valid by caller */
474
475 /* Execute the method, no parameters */
476
477 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
478 ACPI_BTYPE_PACKAGE, &obj_desc);
479 if (ACPI_FAILURE(status)) {
480 return_ACPI_STATUS(status);
481 }
482
483 /*
484 * Create a resource linked list from the byte stream buffer that comes
485 * back from the _CRS method execution.
486 */
487 status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
488
489 /* On exit, we must delete the object returned by evaluate_object */
490
491 acpi_ut_remove_reference(obj_desc);
492 return_ACPI_STATUS(status);
493 }
494
495 /*******************************************************************************
496 *
497 * FUNCTION: acpi_rs_get_crs_method_data
498 *
499 * PARAMETERS: node - Device node
500 * ret_buffer - Pointer to a buffer structure for the
501 * results
502 *
503 * RETURN: Status
504 *
505 * DESCRIPTION: This function is called to get the _CRS value of an object
506 * contained in an object specified by the handle passed in
507 *
508 * If the function fails an appropriate status will be returned
509 * and the contents of the callers buffer is undefined.
510 *
511 ******************************************************************************/
512
513 acpi_status
acpi_rs_get_crs_method_data(struct acpi_namespace_node * node,struct acpi_buffer * ret_buffer)514 acpi_rs_get_crs_method_data(struct acpi_namespace_node *node,
515 struct acpi_buffer *ret_buffer)
516 {
517 union acpi_operand_object *obj_desc;
518 acpi_status status;
519
520 ACPI_FUNCTION_TRACE(rs_get_crs_method_data);
521
522 /* Parameters guaranteed valid by caller */
523
524 /* Execute the method, no parameters */
525
526 status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
527 ACPI_BTYPE_BUFFER, &obj_desc);
528 if (ACPI_FAILURE(status)) {
529 return_ACPI_STATUS(status);
530 }
531
532 /*
533 * Make the call to create a resource linked list from the
534 * byte stream buffer that comes back from the _CRS method
535 * execution.
536 */
537 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
538
539 /* On exit, we must delete the object returned by evaluateObject */
540
541 acpi_ut_remove_reference(obj_desc);
542 return_ACPI_STATUS(status);
543 }
544
545 /*******************************************************************************
546 *
547 * FUNCTION: acpi_rs_get_prs_method_data
548 *
549 * PARAMETERS: node - Device node
550 * ret_buffer - Pointer to a buffer structure for the
551 * results
552 *
553 * RETURN: Status
554 *
555 * DESCRIPTION: This function is called to get the _PRS value of an object
556 * contained in an object specified by the handle passed in
557 *
558 * If the function fails an appropriate status will be returned
559 * and the contents of the callers buffer is undefined.
560 *
561 ******************************************************************************/
562
563 #ifdef ACPI_FUTURE_USAGE
564 acpi_status
acpi_rs_get_prs_method_data(struct acpi_namespace_node * node,struct acpi_buffer * ret_buffer)565 acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
566 struct acpi_buffer *ret_buffer)
567 {
568 union acpi_operand_object *obj_desc;
569 acpi_status status;
570
571 ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
572
573 /* Parameters guaranteed valid by caller */
574
575 /* Execute the method, no parameters */
576
577 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
578 ACPI_BTYPE_BUFFER, &obj_desc);
579 if (ACPI_FAILURE(status)) {
580 return_ACPI_STATUS(status);
581 }
582
583 /*
584 * Make the call to create a resource linked list from the
585 * byte stream buffer that comes back from the _CRS method
586 * execution.
587 */
588 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
589
590 /* On exit, we must delete the object returned by evaluateObject */
591
592 acpi_ut_remove_reference(obj_desc);
593 return_ACPI_STATUS(status);
594 }
595 #endif /* ACPI_FUTURE_USAGE */
596
597 /*******************************************************************************
598 *
599 * FUNCTION: acpi_rs_get_aei_method_data
600 *
601 * PARAMETERS: node - Device node
602 * ret_buffer - Pointer to a buffer structure for the
603 * results
604 *
605 * RETURN: Status
606 *
607 * DESCRIPTION: This function is called to get the _AEI value of an object
608 * contained in an object specified by the handle passed in
609 *
610 * If the function fails an appropriate status will be returned
611 * and the contents of the callers buffer is undefined.
612 *
613 ******************************************************************************/
614
615 acpi_status
acpi_rs_get_aei_method_data(struct acpi_namespace_node * node,struct acpi_buffer * ret_buffer)616 acpi_rs_get_aei_method_data(struct acpi_namespace_node *node,
617 struct acpi_buffer *ret_buffer)
618 {
619 union acpi_operand_object *obj_desc;
620 acpi_status status;
621
622 ACPI_FUNCTION_TRACE(rs_get_aei_method_data);
623
624 /* Parameters guaranteed valid by caller */
625
626 /* Execute the method, no parameters */
627
628 status = acpi_ut_evaluate_object(node, METHOD_NAME__AEI,
629 ACPI_BTYPE_BUFFER, &obj_desc);
630 if (ACPI_FAILURE(status)) {
631 return_ACPI_STATUS(status);
632 }
633
634 /*
635 * Make the call to create a resource linked list from the
636 * byte stream buffer that comes back from the _CRS method
637 * execution.
638 */
639 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
640
641 /* On exit, we must delete the object returned by evaluateObject */
642
643 acpi_ut_remove_reference(obj_desc);
644 return_ACPI_STATUS(status);
645 }
646
647 /*******************************************************************************
648 *
649 * FUNCTION: acpi_rs_get_method_data
650 *
651 * PARAMETERS: handle - Handle to the containing object
652 * path - Path to method, relative to Handle
653 * ret_buffer - Pointer to a buffer structure for the
654 * results
655 *
656 * RETURN: Status
657 *
658 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
659 * object contained in an object specified by the handle passed in
660 *
661 * If the function fails an appropriate status will be returned
662 * and the contents of the callers buffer is undefined.
663 *
664 ******************************************************************************/
665
666 acpi_status
acpi_rs_get_method_data(acpi_handle handle,char * path,struct acpi_buffer * ret_buffer)667 acpi_rs_get_method_data(acpi_handle handle,
668 char *path, struct acpi_buffer *ret_buffer)
669 {
670 union acpi_operand_object *obj_desc;
671 acpi_status status;
672
673 ACPI_FUNCTION_TRACE(rs_get_method_data);
674
675 /* Parameters guaranteed valid by caller */
676
677 /* Execute the method, no parameters */
678
679 status =
680 acpi_ut_evaluate_object(ACPI_CAST_PTR
681 (struct acpi_namespace_node, handle), path,
682 ACPI_BTYPE_BUFFER, &obj_desc);
683 if (ACPI_FAILURE(status)) {
684 return_ACPI_STATUS(status);
685 }
686
687 /*
688 * Make the call to create a resource linked list from the
689 * byte stream buffer that comes back from the method
690 * execution.
691 */
692 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
693
694 /* On exit, we must delete the object returned by evaluate_object */
695
696 acpi_ut_remove_reference(obj_desc);
697 return_ACPI_STATUS(status);
698 }
699
700 /*******************************************************************************
701 *
702 * FUNCTION: acpi_rs_set_srs_method_data
703 *
704 * PARAMETERS: node - Device node
705 * in_buffer - Pointer to a buffer structure of the
706 * parameter
707 *
708 * RETURN: Status
709 *
710 * DESCRIPTION: This function is called to set the _SRS of an object contained
711 * in an object specified by the handle passed in
712 *
713 * If the function fails an appropriate status will be returned
714 * and the contents of the callers buffer is undefined.
715 *
716 * Note: Parameters guaranteed valid by caller
717 *
718 ******************************************************************************/
719
720 acpi_status
acpi_rs_set_srs_method_data(struct acpi_namespace_node * node,struct acpi_buffer * in_buffer)721 acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
722 struct acpi_buffer *in_buffer)
723 {
724 struct acpi_evaluate_info *info;
725 union acpi_operand_object *args[2];
726 acpi_status status;
727 struct acpi_buffer buffer;
728
729 ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
730
731 /* Allocate and initialize the evaluation information block */
732
733 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
734 if (!info) {
735 return_ACPI_STATUS(AE_NO_MEMORY);
736 }
737
738 info->prefix_node = node;
739 info->pathname = METHOD_NAME__SRS;
740 info->parameters = args;
741 info->flags = ACPI_IGNORE_RETURN_VALUE;
742
743 /*
744 * The in_buffer parameter will point to a linked list of
745 * resource parameters. It needs to be formatted into a
746 * byte stream to be sent in as an input parameter to _SRS
747 *
748 * Convert the linked list into a byte stream
749 */
750 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
751 status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer);
752 if (ACPI_FAILURE(status)) {
753 goto cleanup;
754 }
755
756 /* Create and initialize the method parameter object */
757
758 args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
759 if (!args[0]) {
760 /*
761 * Must free the buffer allocated above (otherwise it is freed
762 * later)
763 */
764 ACPI_FREE(buffer.pointer);
765 status = AE_NO_MEMORY;
766 goto cleanup;
767 }
768
769 args[0]->buffer.length = (u32) buffer.length;
770 args[0]->buffer.pointer = buffer.pointer;
771 args[0]->common.flags = AOPOBJ_DATA_VALID;
772 args[1] = NULL;
773
774 /* Execute the method, no return value is expected */
775
776 status = acpi_ns_evaluate(info);
777
778 /* Clean up and return the status from acpi_ns_evaluate */
779
780 acpi_ut_remove_reference(args[0]);
781
782 cleanup:
783 ACPI_FREE(info);
784 return_ACPI_STATUS(status);
785 }
786