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1/*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, 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
50ACPI_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 ******************************************************************************/
64u8 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
98u16 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
131void
132acpi_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
197void
198acpi_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
248void
249acpi_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
278static 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
315acpi_rs_length
316acpi_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 = (u32)
362 ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) + 1;
363 total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
364
365 ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
366
367 /* Copy the resource_source string to the destination */
368
369 resource_source->string_length =
370 acpi_rs_strcpy(resource_source->string_ptr,
371 ACPI_CAST_PTR(char,
372 &aml_resource_source[1]));
373
374 return ((acpi_rs_length) total_length);
375 }
376
377 /* resource_source is not present */
378
379 resource_source->index = 0;
380 resource_source->string_length = 0;
381 resource_source->string_ptr = NULL;
382 return (0);
383}
384
385/*******************************************************************************
386 *
387 * FUNCTION: acpi_rs_set_resource_source
388 *
389 * PARAMETERS: Aml - Pointer to the raw AML descriptor
390 * minimum_length - Minimum length of the descriptor (minus
391 * any optional fields)
392 * resource_source - Internal resource_source
393
394 *
395 * RETURN: Total length of the AML descriptor
396 *
397 * DESCRIPTION: Convert an optional resource_source from internal format to a
398 * raw AML resource descriptor
399 *
400 ******************************************************************************/
401
402acpi_rsdesc_size
403acpi_rs_set_resource_source(union aml_resource * aml,
404 acpi_rs_length minimum_length,
405 struct acpi_resource_source * resource_source)
406{
407 u8 *aml_resource_source;
408 acpi_rsdesc_size descriptor_length;
409
410 ACPI_FUNCTION_ENTRY();
411
412 descriptor_length = minimum_length;
413
414 /* Non-zero string length indicates presence of a resource_source */
415
416 if (resource_source->string_length) {
417
418 /* Point to the end of the AML descriptor */
419
420 aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
421
422 /* Copy the resource_source_index */
423
424 aml_resource_source[0] = (u8) resource_source->index;
425
426 /* Copy the resource_source string */
427
428 ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
429 resource_source->string_ptr);
430
431 /*
432 * Add the length of the string (+ 1 for null terminator) to the
433 * final descriptor length
434 */
435 descriptor_length +=
436 ((acpi_rsdesc_size) resource_source->string_length + 1);
437 }
438
439 /* Return the new total length of the AML descriptor */
440
441 return (descriptor_length);
442}
443
444/*******************************************************************************
445 *
446 * FUNCTION: acpi_rs_get_prt_method_data
447 *
448 * PARAMETERS: Node - Device node
449 * ret_buffer - Pointer to a buffer structure for the
450 * results
451 *
452 * RETURN: Status
453 *
454 * DESCRIPTION: This function is called to get the _PRT value of an object
455 * contained in an object specified by the handle passed in
456 *
457 * If the function fails an appropriate status will be returned
458 * and the contents of the callers buffer is undefined.
459 *
460 ******************************************************************************/
461
462acpi_status
463acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,
464 struct acpi_buffer * ret_buffer)
465{
466 union acpi_operand_object *obj_desc;
467 acpi_status status;
468
469 ACPI_FUNCTION_TRACE(rs_get_prt_method_data);
470
471 /* Parameters guaranteed valid by caller */
472
473 /* Execute the method, no parameters */
474
475 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
476 ACPI_BTYPE_PACKAGE, &obj_desc);
477 if (ACPI_FAILURE(status)) {
478 return_ACPI_STATUS(status);
479 }
480
481 /*
482 * Create a resource linked list from the byte stream buffer that comes
483 * back from the _CRS method execution.
484 */
485 status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
486
487 /* On exit, we must delete the object returned by evaluate_object */
488
489 acpi_ut_remove_reference(obj_desc);
490 return_ACPI_STATUS(status);
491}
492
493/*******************************************************************************
494 *
495 * FUNCTION: acpi_rs_get_crs_method_data
496 *
497 * PARAMETERS: Node - Device node
498 * ret_buffer - Pointer to a buffer structure for the
499 * results
500 *
501 * RETURN: Status
502 *
503 * DESCRIPTION: This function is called to get the _CRS value of an object
504 * contained in an object specified by the handle passed in
505 *
506 * If the function fails an appropriate status will be returned
507 * and the contents of the callers buffer is undefined.
508 *
509 ******************************************************************************/
510
511acpi_status
512acpi_rs_get_crs_method_data(struct acpi_namespace_node *node,
513 struct acpi_buffer *ret_buffer)
514{
515 union acpi_operand_object *obj_desc;
516 acpi_status status;
517
518 ACPI_FUNCTION_TRACE(rs_get_crs_method_data);
519
520 /* Parameters guaranteed valid by caller */
521
522 /* Execute the method, no parameters */
523
524 status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
525 ACPI_BTYPE_BUFFER, &obj_desc);
526 if (ACPI_FAILURE(status)) {
527 return_ACPI_STATUS(status);
528 }
529
530 /*
531 * Make the call to create a resource linked list from the
532 * byte stream buffer that comes back from the _CRS method
533 * execution.
534 */
535 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
536
537 /* On exit, we must delete the object returned by evaluate_object */
538
539 acpi_ut_remove_reference(obj_desc);
540 return_ACPI_STATUS(status);
541}
542
543/*******************************************************************************
544 *
545 * FUNCTION: acpi_rs_get_prs_method_data
546 *
547 * PARAMETERS: Node - Device node
548 * ret_buffer - Pointer to a buffer structure for the
549 * results
550 *
551 * RETURN: Status
552 *
553 * DESCRIPTION: This function is called to get the _PRS value of an object
554 * contained in an object specified by the handle passed in
555 *
556 * If the function fails an appropriate status will be returned
557 * and the contents of the callers buffer is undefined.
558 *
559 ******************************************************************************/
560
561#ifdef ACPI_FUTURE_USAGE
562acpi_status
563acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
564 struct acpi_buffer *ret_buffer)
565{
566 union acpi_operand_object *obj_desc;
567 acpi_status status;
568
569 ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
570
571 /* Parameters guaranteed valid by caller */
572
573 /* Execute the method, no parameters */
574
575 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
576 ACPI_BTYPE_BUFFER, &obj_desc);
577 if (ACPI_FAILURE(status)) {
578 return_ACPI_STATUS(status);
579 }
580
581 /*
582 * Make the call to create a resource linked list from the
583 * byte stream buffer that comes back from the _CRS method
584 * execution.
585 */
586 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
587
588 /* On exit, we must delete the object returned by evaluate_object */
589
590 acpi_ut_remove_reference(obj_desc);
591 return_ACPI_STATUS(status);
592}
593#endif /* ACPI_FUTURE_USAGE */
594
595/*******************************************************************************
596 *
597 * FUNCTION: acpi_rs_get_aei_method_data
598 *
599 * PARAMETERS: Node - Device node
600 * ret_buffer - Pointer to a buffer structure for the
601 * results
602 *
603 * RETURN: Status
604 *
605 * DESCRIPTION: This function is called to get the _AEI value of an object
606 * contained in an object specified by the handle passed in
607 *
608 * If the function fails an appropriate status will be returned
609 * and the contents of the callers buffer is undefined.
610 *
611 ******************************************************************************/
612
613acpi_status
614acpi_rs_get_aei_method_data(struct acpi_namespace_node *node,
615 struct acpi_buffer *ret_buffer)
616{
617 union acpi_operand_object *obj_desc;
618 acpi_status status;
619
620 ACPI_FUNCTION_TRACE(rs_get_aei_method_data);
621
622 /* Parameters guaranteed valid by caller */
623
624 /* Execute the method, no parameters */
625
626 status = acpi_ut_evaluate_object(node, METHOD_NAME__AEI,
627 ACPI_BTYPE_BUFFER, &obj_desc);
628 if (ACPI_FAILURE(status)) {
629 return_ACPI_STATUS(status);
630 }
631
632 /*
633 * Make the call to create a resource linked list from the
634 * byte stream buffer that comes back from the _CRS method
635 * execution.
636 */
637 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
638
639 /* On exit, we must delete the object returned by evaluate_object */
640
641 acpi_ut_remove_reference(obj_desc);
642 return_ACPI_STATUS(status);
643}
644
645/*******************************************************************************
646 *
647 * FUNCTION: acpi_rs_get_method_data
648 *
649 * PARAMETERS: Handle - Handle to the containing object
650 * Path - Path to method, relative to Handle
651 * ret_buffer - Pointer to a buffer structure for the
652 * results
653 *
654 * RETURN: Status
655 *
656 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
657 * object contained in an object specified by the handle passed in
658 *
659 * If the function fails an appropriate status will be returned
660 * and the contents of the callers buffer is undefined.
661 *
662 ******************************************************************************/
663
664acpi_status
665acpi_rs_get_method_data(acpi_handle handle,
666 char *path, struct acpi_buffer *ret_buffer)
667{
668 union acpi_operand_object *obj_desc;
669 acpi_status status;
670
671 ACPI_FUNCTION_TRACE(rs_get_method_data);
672
673 /* Parameters guaranteed valid by caller */
674
675 /* Execute the method, no parameters */
676
677 status =
678 acpi_ut_evaluate_object(handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
679 if (ACPI_FAILURE(status)) {
680 return_ACPI_STATUS(status);
681 }
682
683 /*
684 * Make the call to create a resource linked list from the
685 * byte stream buffer that comes back from the method
686 * execution.
687 */
688 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
689
690 /* On exit, we must delete the object returned by evaluate_object */
691
692 acpi_ut_remove_reference(obj_desc);
693 return_ACPI_STATUS(status);
694}
695
696/*******************************************************************************
697 *
698 * FUNCTION: acpi_rs_set_srs_method_data
699 *
700 * PARAMETERS: Node - Device node
701 * in_buffer - Pointer to a buffer structure of the
702 * parameter
703 *
704 * RETURN: Status
705 *
706 * DESCRIPTION: This function is called to set the _SRS of an object contained
707 * in an object specified by the handle passed in
708 *
709 * If the function fails an appropriate status will be returned
710 * and the contents of the callers buffer is undefined.
711 *
712 * Note: Parameters guaranteed valid by caller
713 *
714 ******************************************************************************/
715
716acpi_status
717acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
718 struct acpi_buffer *in_buffer)
719{
720 struct acpi_evaluate_info *info;
721 union acpi_operand_object *args[2];
722 acpi_status status;
723 struct acpi_buffer buffer;
724
725 ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
726
727 /* Allocate and initialize the evaluation information block */
728
729 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
730 if (!info) {
731 return_ACPI_STATUS(AE_NO_MEMORY);
732 }
733
734 info->prefix_node = node;
735 info->pathname = METHOD_NAME__SRS;
736 info->parameters = args;
737 info->flags = ACPI_IGNORE_RETURN_VALUE;
738
739 /*
740 * The in_buffer parameter will point to a linked list of
741 * resource parameters. It needs to be formatted into a
742 * byte stream to be sent in as an input parameter to _SRS
743 *
744 * Convert the linked list into a byte stream
745 */
746 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
747 status = acpi_rs_create_aml_resources(in_buffer->pointer, &buffer);
748 if (ACPI_FAILURE(status)) {
749 goto cleanup;
750 }
751
752 /* Create and initialize the method parameter object */
753
754 args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
755 if (!args[0]) {
756 /*
757 * Must free the buffer allocated above (otherwise it is freed
758 * later)
759 */
760 ACPI_FREE(buffer.pointer);
761 status = AE_NO_MEMORY;
762 goto cleanup;
763 }
764
765 args[0]->buffer.length = (u32) buffer.length;
766 args[0]->buffer.pointer = buffer.pointer;
767 args[0]->common.flags = AOPOBJ_DATA_VALID;
768 args[1] = NULL;
769
770 /* Execute the method, no return value is expected */
771
772 status = acpi_ns_evaluate(info);
773
774 /* Clean up and return the status from acpi_ns_evaluate */
775
776 acpi_ut_remove_reference(args[0]);
777
778 cleanup:
779 ACPI_FREE(info);
780 return_ACPI_STATUS(status);
781}
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/acpi.h>
45#include "accommon.h"
46#include "acnamesp.h"
47#include "acresrc.h"
48
49#define _COMPONENT ACPI_RESOURCES
50ACPI_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 ******************************************************************************/
64u8 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
98u16 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
131void
132acpi_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
151 ACPI_MEMCPY(destination, source, item_count);
152 return;
153
154 /*
155 * 16-, 32-, and 64-bit cases must use the move macros that perform
156 * endian conversion and/or accommodate hardware that cannot perform
157 * misaligned memory transfers
158 */
159 case ACPI_RSC_MOVE16:
160 case ACPI_RSC_MOVE_GPIO_PIN:
161
162 ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
163 &ACPI_CAST_PTR(u16, source)[i]);
164 break;
165
166 case ACPI_RSC_MOVE32:
167
168 ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
169 &ACPI_CAST_PTR(u32, source)[i]);
170 break;
171
172 case ACPI_RSC_MOVE64:
173
174 ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
175 &ACPI_CAST_PTR(u64, source)[i]);
176 break;
177
178 default:
179
180 return;
181 }
182 }
183}
184
185/*******************************************************************************
186 *
187 * FUNCTION: acpi_rs_set_resource_length
188 *
189 * PARAMETERS: total_length - Length of the AML descriptor, including
190 * the header and length fields.
191 * aml - Pointer to the raw AML descriptor
192 *
193 * RETURN: None
194 *
195 * DESCRIPTION: Set the resource_length field of an AML
196 * resource descriptor, both Large and Small descriptors are
197 * supported automatically. Note: Descriptor Type field must
198 * be valid.
199 *
200 ******************************************************************************/
201
202void
203acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
204 union aml_resource *aml)
205{
206 acpi_rs_length resource_length;
207
208 ACPI_FUNCTION_ENTRY();
209
210 /* Length is the total descriptor length minus the header length */
211
212 resource_length = (acpi_rs_length)
213 (total_length - acpi_ut_get_resource_header_length(aml));
214
215 /* Length is stored differently for large and small descriptors */
216
217 if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
218
219 /* Large descriptor -- bytes 1-2 contain the 16-bit length */
220
221 ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
222 &resource_length);
223 } else {
224 /* Small descriptor -- bits 2:0 of byte 0 contain the length */
225
226 aml->small_header.descriptor_type = (u8)
227
228 /* Clear any existing length, preserving descriptor type bits */
229 ((aml->small_header.
230 descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
231
232 | resource_length);
233 }
234}
235
236/*******************************************************************************
237 *
238 * FUNCTION: acpi_rs_set_resource_header
239 *
240 * PARAMETERS: descriptor_type - Byte to be inserted as the type
241 * total_length - Length of the AML descriptor, including
242 * the header and length fields.
243 * aml - Pointer to the raw AML descriptor
244 *
245 * RETURN: None
246 *
247 * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
248 * resource descriptor, both Large and Small descriptors are
249 * supported automatically
250 *
251 ******************************************************************************/
252
253void
254acpi_rs_set_resource_header(u8 descriptor_type,
255 acpi_rsdesc_size total_length,
256 union aml_resource *aml)
257{
258 ACPI_FUNCTION_ENTRY();
259
260 /* Set the Resource Type */
261
262 aml->small_header.descriptor_type = descriptor_type;
263
264 /* Set the Resource Length */
265
266 acpi_rs_set_resource_length(total_length, aml);
267}
268
269/*******************************************************************************
270 *
271 * FUNCTION: acpi_rs_strcpy
272 *
273 * PARAMETERS: destination - Pointer to the destination string
274 * source - Pointer to the source string
275 *
276 * RETURN: String length, including NULL terminator
277 *
278 * DESCRIPTION: Local string copy that returns the string length, saving a
279 * strcpy followed by a strlen.
280 *
281 ******************************************************************************/
282
283static u16 acpi_rs_strcpy(char *destination, char *source)
284{
285 u16 i;
286
287 ACPI_FUNCTION_ENTRY();
288
289 for (i = 0; source[i]; i++) {
290 destination[i] = source[i];
291 }
292
293 destination[i] = 0;
294
295 /* Return string length including the NULL terminator */
296
297 return ((u16) (i + 1));
298}
299
300/*******************************************************************************
301 *
302 * FUNCTION: acpi_rs_get_resource_source
303 *
304 * PARAMETERS: resource_length - Length field of the descriptor
305 * minimum_length - Minimum length of the descriptor (minus
306 * any optional fields)
307 * resource_source - Where the resource_source is returned
308 * aml - Pointer to the raw AML descriptor
309 * string_ptr - (optional) where to store the actual
310 * resource_source string
311 *
312 * RETURN: Length of the string plus NULL terminator, rounded up to native
313 * word boundary
314 *
315 * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
316 * to an internal resource descriptor
317 *
318 ******************************************************************************/
319
320acpi_rs_length
321acpi_rs_get_resource_source(acpi_rs_length resource_length,
322 acpi_rs_length minimum_length,
323 struct acpi_resource_source * resource_source,
324 union aml_resource * aml, char *string_ptr)
325{
326 acpi_rsdesc_size total_length;
327 u8 *aml_resource_source;
328
329 ACPI_FUNCTION_ENTRY();
330
331 total_length =
332 resource_length + sizeof(struct aml_resource_large_header);
333 aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
334
335 /*
336 * resource_source is present if the length of the descriptor is longer than
337 * the minimum length.
338 *
339 * Note: Some resource descriptors will have an additional null, so
340 * we add 1 to the minimum length.
341 */
342 if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) {
343
344 /* Get the resource_source_index */
345
346 resource_source->index = aml_resource_source[0];
347
348 resource_source->string_ptr = string_ptr;
349 if (!string_ptr) {
350 /*
351 * String destination pointer is not specified; Set the String
352 * pointer to the end of the current resource_source structure.
353 */
354 resource_source->string_ptr =
355 ACPI_ADD_PTR(char, resource_source,
356 sizeof(struct acpi_resource_source));
357 }
358
359 /*
360 * In order for the Resource length to be a multiple of the native
361 * word, calculate the length of the string (+1 for NULL terminator)
362 * and expand to the next word multiple.
363 *
364 * Zero the entire area of the buffer.
365 */
366 total_length =
367 (u32)
368 ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) +
369 1;
370 total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
371
372 ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
373
374 /* Copy the resource_source string to the destination */
375
376 resource_source->string_length =
377 acpi_rs_strcpy(resource_source->string_ptr,
378 ACPI_CAST_PTR(char,
379 &aml_resource_source[1]));
380
381 return ((acpi_rs_length) total_length);
382 }
383
384 /* resource_source is not present */
385
386 resource_source->index = 0;
387 resource_source->string_length = 0;
388 resource_source->string_ptr = NULL;
389 return (0);
390}
391
392/*******************************************************************************
393 *
394 * FUNCTION: acpi_rs_set_resource_source
395 *
396 * PARAMETERS: aml - Pointer to the raw AML descriptor
397 * minimum_length - Minimum length of the descriptor (minus
398 * any optional fields)
399 * resource_source - Internal resource_source
400
401 *
402 * RETURN: Total length of the AML descriptor
403 *
404 * DESCRIPTION: Convert an optional resource_source from internal format to a
405 * raw AML resource descriptor
406 *
407 ******************************************************************************/
408
409acpi_rsdesc_size
410acpi_rs_set_resource_source(union aml_resource * aml,
411 acpi_rs_length minimum_length,
412 struct acpi_resource_source * resource_source)
413{
414 u8 *aml_resource_source;
415 acpi_rsdesc_size descriptor_length;
416
417 ACPI_FUNCTION_ENTRY();
418
419 descriptor_length = minimum_length;
420
421 /* Non-zero string length indicates presence of a resource_source */
422
423 if (resource_source->string_length) {
424
425 /* Point to the end of the AML descriptor */
426
427 aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
428
429 /* Copy the resource_source_index */
430
431 aml_resource_source[0] = (u8) resource_source->index;
432
433 /* Copy the resource_source string */
434
435 ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
436 resource_source->string_ptr);
437
438 /*
439 * Add the length of the string (+ 1 for null terminator) to the
440 * final descriptor length
441 */
442 descriptor_length +=
443 ((acpi_rsdesc_size) resource_source->string_length + 1);
444 }
445
446 /* Return the new total length of the AML descriptor */
447
448 return (descriptor_length);
449}
450
451/*******************************************************************************
452 *
453 * FUNCTION: acpi_rs_get_prt_method_data
454 *
455 * PARAMETERS: node - Device node
456 * ret_buffer - Pointer to a buffer structure for the
457 * results
458 *
459 * RETURN: Status
460 *
461 * DESCRIPTION: This function is called to get the _PRT value of an object
462 * contained in an object specified by the handle passed in
463 *
464 * If the function fails an appropriate status will be returned
465 * and the contents of the callers buffer is undefined.
466 *
467 ******************************************************************************/
468
469acpi_status
470acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,
471 struct acpi_buffer * ret_buffer)
472{
473 union acpi_operand_object *obj_desc;
474 acpi_status status;
475
476 ACPI_FUNCTION_TRACE(rs_get_prt_method_data);
477
478 /* Parameters guaranteed valid by caller */
479
480 /* Execute the method, no parameters */
481
482 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
483 ACPI_BTYPE_PACKAGE, &obj_desc);
484 if (ACPI_FAILURE(status)) {
485 return_ACPI_STATUS(status);
486 }
487
488 /*
489 * Create a resource linked list from the byte stream buffer that comes
490 * back from the _CRS method execution.
491 */
492 status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
493
494 /* On exit, we must delete the object returned by evaluate_object */
495
496 acpi_ut_remove_reference(obj_desc);
497 return_ACPI_STATUS(status);
498}
499
500/*******************************************************************************
501 *
502 * FUNCTION: acpi_rs_get_crs_method_data
503 *
504 * PARAMETERS: node - Device node
505 * ret_buffer - Pointer to a buffer structure for the
506 * results
507 *
508 * RETURN: Status
509 *
510 * DESCRIPTION: This function is called to get the _CRS value of an object
511 * contained in an object specified by the handle passed in
512 *
513 * If the function fails an appropriate status will be returned
514 * and the contents of the callers buffer is undefined.
515 *
516 ******************************************************************************/
517
518acpi_status
519acpi_rs_get_crs_method_data(struct acpi_namespace_node *node,
520 struct acpi_buffer *ret_buffer)
521{
522 union acpi_operand_object *obj_desc;
523 acpi_status status;
524
525 ACPI_FUNCTION_TRACE(rs_get_crs_method_data);
526
527 /* Parameters guaranteed valid by caller */
528
529 /* Execute the method, no parameters */
530
531 status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
532 ACPI_BTYPE_BUFFER, &obj_desc);
533 if (ACPI_FAILURE(status)) {
534 return_ACPI_STATUS(status);
535 }
536
537 /*
538 * Make the call to create a resource linked list from the
539 * byte stream buffer that comes back from the _CRS method
540 * execution.
541 */
542 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
543
544 /* On exit, we must delete the object returned by evaluateObject */
545
546 acpi_ut_remove_reference(obj_desc);
547 return_ACPI_STATUS(status);
548}
549
550/*******************************************************************************
551 *
552 * FUNCTION: acpi_rs_get_prs_method_data
553 *
554 * PARAMETERS: node - Device node
555 * ret_buffer - Pointer to a buffer structure for the
556 * results
557 *
558 * RETURN: Status
559 *
560 * DESCRIPTION: This function is called to get the _PRS 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#ifdef ACPI_FUTURE_USAGE
569acpi_status
570acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
571 struct acpi_buffer *ret_buffer)
572{
573 union acpi_operand_object *obj_desc;
574 acpi_status status;
575
576 ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
577
578 /* Parameters guaranteed valid by caller */
579
580 /* Execute the method, no parameters */
581
582 status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
583 ACPI_BTYPE_BUFFER, &obj_desc);
584 if (ACPI_FAILURE(status)) {
585 return_ACPI_STATUS(status);
586 }
587
588 /*
589 * Make the call to create a resource linked list from the
590 * byte stream buffer that comes back from the _CRS method
591 * execution.
592 */
593 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
594
595 /* On exit, we must delete the object returned by evaluateObject */
596
597 acpi_ut_remove_reference(obj_desc);
598 return_ACPI_STATUS(status);
599}
600#endif /* ACPI_FUTURE_USAGE */
601
602/*******************************************************************************
603 *
604 * FUNCTION: acpi_rs_get_aei_method_data
605 *
606 * PARAMETERS: node - Device node
607 * ret_buffer - Pointer to a buffer structure for the
608 * results
609 *
610 * RETURN: Status
611 *
612 * DESCRIPTION: This function is called to get the _AEI value of an object
613 * contained in an object specified by the handle passed in
614 *
615 * If the function fails an appropriate status will be returned
616 * and the contents of the callers buffer is undefined.
617 *
618 ******************************************************************************/
619
620acpi_status
621acpi_rs_get_aei_method_data(struct acpi_namespace_node *node,
622 struct acpi_buffer *ret_buffer)
623{
624 union acpi_operand_object *obj_desc;
625 acpi_status status;
626
627 ACPI_FUNCTION_TRACE(rs_get_aei_method_data);
628
629 /* Parameters guaranteed valid by caller */
630
631 /* Execute the method, no parameters */
632
633 status = acpi_ut_evaluate_object(node, METHOD_NAME__AEI,
634 ACPI_BTYPE_BUFFER, &obj_desc);
635 if (ACPI_FAILURE(status)) {
636 return_ACPI_STATUS(status);
637 }
638
639 /*
640 * Make the call to create a resource linked list from the
641 * byte stream buffer that comes back from the _CRS method
642 * execution.
643 */
644 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
645
646 /* On exit, we must delete the object returned by evaluateObject */
647
648 acpi_ut_remove_reference(obj_desc);
649 return_ACPI_STATUS(status);
650}
651
652/*******************************************************************************
653 *
654 * FUNCTION: acpi_rs_get_method_data
655 *
656 * PARAMETERS: handle - Handle to the containing object
657 * path - Path to method, relative to Handle
658 * ret_buffer - Pointer to a buffer structure for the
659 * results
660 *
661 * RETURN: Status
662 *
663 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
664 * object contained in an object specified by the handle passed in
665 *
666 * If the function fails an appropriate status will be returned
667 * and the contents of the callers buffer is undefined.
668 *
669 ******************************************************************************/
670
671acpi_status
672acpi_rs_get_method_data(acpi_handle handle,
673 char *path, struct acpi_buffer *ret_buffer)
674{
675 union acpi_operand_object *obj_desc;
676 acpi_status status;
677
678 ACPI_FUNCTION_TRACE(rs_get_method_data);
679
680 /* Parameters guaranteed valid by caller */
681
682 /* Execute the method, no parameters */
683
684 status =
685 acpi_ut_evaluate_object(ACPI_CAST_PTR
686 (struct acpi_namespace_node, handle), path,
687 ACPI_BTYPE_BUFFER, &obj_desc);
688 if (ACPI_FAILURE(status)) {
689 return_ACPI_STATUS(status);
690 }
691
692 /*
693 * Make the call to create a resource linked list from the
694 * byte stream buffer that comes back from the method
695 * execution.
696 */
697 status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
698
699 /* On exit, we must delete the object returned by evaluate_object */
700
701 acpi_ut_remove_reference(obj_desc);
702 return_ACPI_STATUS(status);
703}
704
705/*******************************************************************************
706 *
707 * FUNCTION: acpi_rs_set_srs_method_data
708 *
709 * PARAMETERS: node - Device node
710 * in_buffer - Pointer to a buffer structure of the
711 * parameter
712 *
713 * RETURN: Status
714 *
715 * DESCRIPTION: This function is called to set the _SRS of an object contained
716 * in an object specified by the handle passed in
717 *
718 * If the function fails an appropriate status will be returned
719 * and the contents of the callers buffer is undefined.
720 *
721 * Note: Parameters guaranteed valid by caller
722 *
723 ******************************************************************************/
724
725acpi_status
726acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
727 struct acpi_buffer *in_buffer)
728{
729 struct acpi_evaluate_info *info;
730 union acpi_operand_object *args[2];
731 acpi_status status;
732 struct acpi_buffer buffer;
733
734 ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
735
736 /* Allocate and initialize the evaluation information block */
737
738 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
739 if (!info) {
740 return_ACPI_STATUS(AE_NO_MEMORY);
741 }
742
743 info->prefix_node = node;
744 info->relative_pathname = METHOD_NAME__SRS;
745 info->parameters = args;
746 info->flags = ACPI_IGNORE_RETURN_VALUE;
747
748 /*
749 * The in_buffer parameter will point to a linked list of
750 * resource parameters. It needs to be formatted into a
751 * byte stream to be sent in as an input parameter to _SRS
752 *
753 * Convert the linked list into a byte stream
754 */
755 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
756 status = acpi_rs_create_aml_resources(in_buffer, &buffer);
757 if (ACPI_FAILURE(status)) {
758 goto cleanup;
759 }
760
761 /* Create and initialize the method parameter object */
762
763 args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
764 if (!args[0]) {
765 /*
766 * Must free the buffer allocated above (otherwise it is freed
767 * later)
768 */
769 ACPI_FREE(buffer.pointer);
770 status = AE_NO_MEMORY;
771 goto cleanup;
772 }
773
774 args[0]->buffer.length = (u32) buffer.length;
775 args[0]->buffer.pointer = buffer.pointer;
776 args[0]->common.flags = AOPOBJ_DATA_VALID;
777 args[1] = NULL;
778
779 /* Execute the method, no return value is expected */
780
781 status = acpi_ns_evaluate(info);
782
783 /* Clean up and return the status from acpi_ns_evaluate */
784
785 acpi_ut_remove_reference(args[0]);
786
787cleanup:
788 ACPI_FREE(info);
789 return_ACPI_STATUS(status);
790}