1 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
2 | /******************************************************************************* |
3 | * |
4 | * Module Name: rsutils - Utilities for the resource manager |
5 | * |
6 | ******************************************************************************/ |
7 | |
8 | #include <acpi/acpi.h> |
9 | #include "accommon.h" |
10 | #include "acnamesp.h" |
11 | #include "acresrc.h" |
12 | |
13 | #define _COMPONENT ACPI_RESOURCES |
14 | ACPI_MODULE_NAME("rsutils" ) |
15 | |
16 | /******************************************************************************* |
17 | * |
18 | * FUNCTION: acpi_rs_decode_bitmask |
19 | * |
20 | * PARAMETERS: mask - Bitmask to decode |
21 | * list - Where the converted list is returned |
22 | * |
23 | * RETURN: Count of bits set (length of list) |
24 | * |
25 | * DESCRIPTION: Convert a bit mask into a list of values |
26 | * |
27 | ******************************************************************************/ |
28 | u8 acpi_rs_decode_bitmask(u16 mask, u8 * list) |
29 | { |
30 | u8 i; |
31 | u8 bit_count; |
32 | |
33 | ACPI_FUNCTION_ENTRY(); |
34 | |
35 | /* Decode the mask bits */ |
36 | |
37 | for (i = 0, bit_count = 0; mask; i++) { |
38 | if (mask & 0x0001) { |
39 | list[bit_count] = i; |
40 | bit_count++; |
41 | } |
42 | |
43 | mask >>= 1; |
44 | } |
45 | |
46 | return (bit_count); |
47 | } |
48 | |
49 | /******************************************************************************* |
50 | * |
51 | * FUNCTION: acpi_rs_encode_bitmask |
52 | * |
53 | * PARAMETERS: list - List of values to encode |
54 | * count - Length of list |
55 | * |
56 | * RETURN: Encoded bitmask |
57 | * |
58 | * DESCRIPTION: Convert a list of values to an encoded bitmask |
59 | * |
60 | ******************************************************************************/ |
61 | |
62 | u16 acpi_rs_encode_bitmask(u8 * list, u8 count) |
63 | { |
64 | u32 i; |
65 | u16 mask; |
66 | |
67 | ACPI_FUNCTION_ENTRY(); |
68 | |
69 | /* Encode the list into a single bitmask */ |
70 | |
71 | for (i = 0, mask = 0; i < count; i++) { |
72 | mask |= (0x1 << list[i]); |
73 | } |
74 | |
75 | return (mask); |
76 | } |
77 | |
78 | /******************************************************************************* |
79 | * |
80 | * FUNCTION: acpi_rs_move_data |
81 | * |
82 | * PARAMETERS: destination - Pointer to the destination descriptor |
83 | * source - Pointer to the source descriptor |
84 | * item_count - How many items to move |
85 | * move_type - Byte width |
86 | * |
87 | * RETURN: None |
88 | * |
89 | * DESCRIPTION: Move multiple data items from one descriptor to another. Handles |
90 | * alignment issues and endian issues if necessary, as configured |
91 | * via the ACPI_MOVE_* macros. (This is why a memcpy is not used) |
92 | * |
93 | ******************************************************************************/ |
94 | |
95 | void |
96 | acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type) |
97 | { |
98 | u32 i; |
99 | |
100 | ACPI_FUNCTION_ENTRY(); |
101 | |
102 | /* One move per item */ |
103 | |
104 | for (i = 0; i < item_count; i++) { |
105 | switch (move_type) { |
106 | /* |
107 | * For the 8-bit case, we can perform the move all at once |
108 | * since there are no alignment or endian issues |
109 | */ |
110 | case ACPI_RSC_MOVE8: |
111 | case ACPI_RSC_MOVE_GPIO_RES: |
112 | case ACPI_RSC_MOVE_SERIAL_VEN: |
113 | case ACPI_RSC_MOVE_SERIAL_RES: |
114 | |
115 | memcpy(destination, source, item_count); |
116 | return; |
117 | |
118 | /* |
119 | * 16-, 32-, and 64-bit cases must use the move macros that perform |
120 | * endian conversion and/or accommodate hardware that cannot perform |
121 | * misaligned memory transfers |
122 | */ |
123 | case ACPI_RSC_MOVE16: |
124 | case ACPI_RSC_MOVE_GPIO_PIN: |
125 | |
126 | ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i], |
127 | &ACPI_CAST_PTR(u16, source)[i]); |
128 | break; |
129 | |
130 | case ACPI_RSC_MOVE32: |
131 | |
132 | ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i], |
133 | &ACPI_CAST_PTR(u32, source)[i]); |
134 | break; |
135 | |
136 | case ACPI_RSC_MOVE64: |
137 | |
138 | ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i], |
139 | &ACPI_CAST_PTR(u64, source)[i]); |
140 | break; |
141 | |
142 | default: |
143 | |
144 | return; |
145 | } |
146 | } |
147 | } |
148 | |
149 | /******************************************************************************* |
150 | * |
151 | * FUNCTION: acpi_rs_set_resource_length |
152 | * |
153 | * PARAMETERS: total_length - Length of the AML descriptor, including |
154 | * the header and length fields. |
155 | * aml - Pointer to the raw AML descriptor |
156 | * |
157 | * RETURN: None |
158 | * |
159 | * DESCRIPTION: Set the resource_length field of an AML |
160 | * resource descriptor, both Large and Small descriptors are |
161 | * supported automatically. Note: Descriptor Type field must |
162 | * be valid. |
163 | * |
164 | ******************************************************************************/ |
165 | |
166 | void |
167 | acpi_rs_set_resource_length(acpi_rsdesc_size total_length, |
168 | union aml_resource *aml) |
169 | { |
170 | acpi_rs_length resource_length; |
171 | |
172 | ACPI_FUNCTION_ENTRY(); |
173 | |
174 | /* Length is the total descriptor length minus the header length */ |
175 | |
176 | resource_length = (acpi_rs_length) |
177 | (total_length - acpi_ut_get_resource_header_length(aml)); |
178 | |
179 | /* Length is stored differently for large and small descriptors */ |
180 | |
181 | if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) { |
182 | |
183 | /* Large descriptor -- bytes 1-2 contain the 16-bit length */ |
184 | |
185 | ACPI_MOVE_16_TO_16(&aml->large_header.resource_length, |
186 | &resource_length); |
187 | } else { |
188 | /* |
189 | * Small descriptor -- bits 2:0 of byte 0 contain the length |
190 | * Clear any existing length, preserving descriptor type bits |
191 | */ |
192 | aml->small_header.descriptor_type = (u8) |
193 | ((aml->small_header.descriptor_type & |
194 | ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK) |
195 | | resource_length); |
196 | } |
197 | } |
198 | |
199 | /******************************************************************************* |
200 | * |
201 | * FUNCTION: acpi_rs_set_resource_header |
202 | * |
203 | * PARAMETERS: descriptor_type - Byte to be inserted as the type |
204 | * total_length - Length of the AML descriptor, including |
205 | * the header and length fields. |
206 | * aml - Pointer to the raw AML descriptor |
207 | * |
208 | * RETURN: None |
209 | * |
210 | * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML |
211 | * resource descriptor, both Large and Small descriptors are |
212 | * supported automatically |
213 | * |
214 | ******************************************************************************/ |
215 | |
216 | void |
217 | (u8 descriptor_type, |
218 | acpi_rsdesc_size total_length, |
219 | union aml_resource *aml) |
220 | { |
221 | ACPI_FUNCTION_ENTRY(); |
222 | |
223 | /* Set the Resource Type */ |
224 | |
225 | aml->small_header.descriptor_type = descriptor_type; |
226 | |
227 | /* Set the Resource Length */ |
228 | |
229 | acpi_rs_set_resource_length(total_length, aml); |
230 | } |
231 | |
232 | /******************************************************************************* |
233 | * |
234 | * FUNCTION: acpi_rs_strcpy |
235 | * |
236 | * PARAMETERS: destination - Pointer to the destination string |
237 | * source - Pointer to the source string |
238 | * |
239 | * RETURN: String length, including NULL terminator |
240 | * |
241 | * DESCRIPTION: Local string copy that returns the string length, saving a |
242 | * strcpy followed by a strlen. |
243 | * |
244 | ******************************************************************************/ |
245 | |
246 | static u16 acpi_rs_strcpy(char *destination, char *source) |
247 | { |
248 | u16 i; |
249 | |
250 | ACPI_FUNCTION_ENTRY(); |
251 | |
252 | for (i = 0; source[i]; i++) { |
253 | destination[i] = source[i]; |
254 | } |
255 | |
256 | destination[i] = 0; |
257 | |
258 | /* Return string length including the NULL terminator */ |
259 | |
260 | return ((u16) (i + 1)); |
261 | } |
262 | |
263 | /******************************************************************************* |
264 | * |
265 | * FUNCTION: acpi_rs_get_resource_source |
266 | * |
267 | * PARAMETERS: resource_length - Length field of the descriptor |
268 | * minimum_length - Minimum length of the descriptor (minus |
269 | * any optional fields) |
270 | * resource_source - Where the resource_source is returned |
271 | * aml - Pointer to the raw AML descriptor |
272 | * string_ptr - (optional) where to store the actual |
273 | * resource_source string |
274 | * |
275 | * RETURN: Length of the string plus NULL terminator, rounded up to native |
276 | * word boundary |
277 | * |
278 | * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor |
279 | * to an internal resource descriptor |
280 | * |
281 | ******************************************************************************/ |
282 | |
283 | acpi_rs_length |
284 | acpi_rs_get_resource_source(acpi_rs_length resource_length, |
285 | acpi_rs_length minimum_length, |
286 | struct acpi_resource_source * resource_source, |
287 | union aml_resource * aml, char *string_ptr) |
288 | { |
289 | acpi_rsdesc_size total_length; |
290 | u8 *aml_resource_source; |
291 | |
292 | ACPI_FUNCTION_ENTRY(); |
293 | |
294 | total_length = |
295 | resource_length + sizeof(struct aml_resource_large_header); |
296 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
297 | |
298 | /* |
299 | * resource_source is present if the length of the descriptor is longer |
300 | * than the minimum length. |
301 | * |
302 | * Note: Some resource descriptors will have an additional null, so |
303 | * we add 1 to the minimum length. |
304 | */ |
305 | if (total_length > (acpi_rsdesc_size)(minimum_length + 1)) { |
306 | |
307 | /* Get the resource_source_index */ |
308 | |
309 | resource_source->index = aml_resource_source[0]; |
310 | |
311 | resource_source->string_ptr = string_ptr; |
312 | if (!string_ptr) { |
313 | /* |
314 | * String destination pointer is not specified; Set the String |
315 | * pointer to the end of the current resource_source structure. |
316 | */ |
317 | resource_source->string_ptr = |
318 | ACPI_ADD_PTR(char, resource_source, |
319 | sizeof(struct acpi_resource_source)); |
320 | } |
321 | |
322 | /* |
323 | * In order for the Resource length to be a multiple of the native |
324 | * word, calculate the length of the string (+1 for NULL terminator) |
325 | * and expand to the next word multiple. |
326 | * |
327 | * Zero the entire area of the buffer. |
328 | */ |
329 | total_length = |
330 | (u32)strlen(ACPI_CAST_PTR(char, &aml_resource_source[1])) + |
331 | 1; |
332 | |
333 | total_length = (u32)ACPI_ROUND_UP_TO_NATIVE_WORD(total_length); |
334 | |
335 | memset(resource_source->string_ptr, 0, total_length); |
336 | |
337 | /* Copy the resource_source string to the destination */ |
338 | |
339 | resource_source->string_length = |
340 | acpi_rs_strcpy(destination: resource_source->string_ptr, |
341 | ACPI_CAST_PTR(char, |
342 | &aml_resource_source[1])); |
343 | |
344 | return ((acpi_rs_length)total_length); |
345 | } |
346 | |
347 | /* resource_source is not present */ |
348 | |
349 | resource_source->index = 0; |
350 | resource_source->string_length = 0; |
351 | resource_source->string_ptr = NULL; |
352 | return (0); |
353 | } |
354 | |
355 | /******************************************************************************* |
356 | * |
357 | * FUNCTION: acpi_rs_set_resource_source |
358 | * |
359 | * PARAMETERS: aml - Pointer to the raw AML descriptor |
360 | * minimum_length - Minimum length of the descriptor (minus |
361 | * any optional fields) |
362 | * resource_source - Internal resource_source |
363 | |
364 | * |
365 | * RETURN: Total length of the AML descriptor |
366 | * |
367 | * DESCRIPTION: Convert an optional resource_source from internal format to a |
368 | * raw AML resource descriptor |
369 | * |
370 | ******************************************************************************/ |
371 | |
372 | acpi_rsdesc_size |
373 | acpi_rs_set_resource_source(union aml_resource *aml, |
374 | acpi_rs_length minimum_length, |
375 | struct acpi_resource_source *resource_source) |
376 | { |
377 | u8 *aml_resource_source; |
378 | acpi_rsdesc_size descriptor_length; |
379 | |
380 | ACPI_FUNCTION_ENTRY(); |
381 | |
382 | descriptor_length = minimum_length; |
383 | |
384 | /* Non-zero string length indicates presence of a resource_source */ |
385 | |
386 | if (resource_source->string_length) { |
387 | |
388 | /* Point to the end of the AML descriptor */ |
389 | |
390 | aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length); |
391 | |
392 | /* Copy the resource_source_index */ |
393 | |
394 | aml_resource_source[0] = (u8) resource_source->index; |
395 | |
396 | /* Copy the resource_source string */ |
397 | |
398 | strcpy(ACPI_CAST_PTR(char, &aml_resource_source[1]), |
399 | q: resource_source->string_ptr); |
400 | |
401 | /* |
402 | * Add the length of the string (+ 1 for null terminator) to the |
403 | * final descriptor length |
404 | */ |
405 | descriptor_length += ((acpi_rsdesc_size) |
406 | resource_source->string_length + 1); |
407 | } |
408 | |
409 | /* Return the new total length of the AML descriptor */ |
410 | |
411 | return (descriptor_length); |
412 | } |
413 | |
414 | /******************************************************************************* |
415 | * |
416 | * FUNCTION: acpi_rs_get_prt_method_data |
417 | * |
418 | * PARAMETERS: node - Device node |
419 | * ret_buffer - Pointer to a buffer structure for the |
420 | * results |
421 | * |
422 | * RETURN: Status |
423 | * |
424 | * DESCRIPTION: This function is called to get the _PRT value of an object |
425 | * contained in an object specified by the handle passed in |
426 | * |
427 | * If the function fails an appropriate status will be returned |
428 | * and the contents of the callers buffer is undefined. |
429 | * |
430 | ******************************************************************************/ |
431 | |
432 | acpi_status |
433 | acpi_rs_get_prt_method_data(struct acpi_namespace_node *node, |
434 | struct acpi_buffer *ret_buffer) |
435 | { |
436 | union acpi_operand_object *obj_desc; |
437 | acpi_status status; |
438 | |
439 | ACPI_FUNCTION_TRACE(rs_get_prt_method_data); |
440 | |
441 | /* Parameters guaranteed valid by caller */ |
442 | |
443 | /* Execute the method, no parameters */ |
444 | |
445 | status = |
446 | acpi_ut_evaluate_object(prefix_node: node, METHOD_NAME__PRT, ACPI_BTYPE_PACKAGE, |
447 | return_desc: &obj_desc); |
448 | if (ACPI_FAILURE(status)) { |
449 | return_ACPI_STATUS(status); |
450 | } |
451 | |
452 | /* |
453 | * Create a resource linked list from the byte stream buffer that comes |
454 | * back from the _CRS method execution. |
455 | */ |
456 | status = acpi_rs_create_pci_routing_table(package_object: obj_desc, output_buffer: ret_buffer); |
457 | |
458 | /* On exit, we must delete the object returned by evaluate_object */ |
459 | |
460 | acpi_ut_remove_reference(object: obj_desc); |
461 | return_ACPI_STATUS(status); |
462 | } |
463 | |
464 | /******************************************************************************* |
465 | * |
466 | * FUNCTION: acpi_rs_get_crs_method_data |
467 | * |
468 | * PARAMETERS: node - Device node |
469 | * ret_buffer - Pointer to a buffer structure for the |
470 | * results |
471 | * |
472 | * RETURN: Status |
473 | * |
474 | * DESCRIPTION: This function is called to get the _CRS value of an object |
475 | * contained in an object specified by the handle passed in |
476 | * |
477 | * If the function fails an appropriate status will be returned |
478 | * and the contents of the callers buffer is undefined. |
479 | * |
480 | ******************************************************************************/ |
481 | |
482 | acpi_status |
483 | acpi_rs_get_crs_method_data(struct acpi_namespace_node *node, |
484 | struct acpi_buffer *ret_buffer) |
485 | { |
486 | union acpi_operand_object *obj_desc; |
487 | acpi_status status; |
488 | |
489 | ACPI_FUNCTION_TRACE(rs_get_crs_method_data); |
490 | |
491 | /* Parameters guaranteed valid by caller */ |
492 | |
493 | /* Execute the method, no parameters */ |
494 | |
495 | status = |
496 | acpi_ut_evaluate_object(prefix_node: node, METHOD_NAME__CRS, ACPI_BTYPE_BUFFER, |
497 | return_desc: &obj_desc); |
498 | if (ACPI_FAILURE(status)) { |
499 | return_ACPI_STATUS(status); |
500 | } |
501 | |
502 | /* |
503 | * Make the call to create a resource linked list from the |
504 | * byte stream buffer that comes back from the _CRS method |
505 | * execution. |
506 | */ |
507 | status = acpi_rs_create_resource_list(aml_buffer: obj_desc, output_buffer: ret_buffer); |
508 | |
509 | /* On exit, we must delete the object returned by evaluateObject */ |
510 | |
511 | acpi_ut_remove_reference(object: obj_desc); |
512 | return_ACPI_STATUS(status); |
513 | } |
514 | |
515 | /******************************************************************************* |
516 | * |
517 | * FUNCTION: acpi_rs_get_prs_method_data |
518 | * |
519 | * PARAMETERS: node - Device node |
520 | * ret_buffer - Pointer to a buffer structure for the |
521 | * results |
522 | * |
523 | * RETURN: Status |
524 | * |
525 | * DESCRIPTION: This function is called to get the _PRS value of an object |
526 | * contained in an object specified by the handle passed in |
527 | * |
528 | * If the function fails an appropriate status will be returned |
529 | * and the contents of the callers buffer is undefined. |
530 | * |
531 | ******************************************************************************/ |
532 | |
533 | acpi_status |
534 | acpi_rs_get_prs_method_data(struct acpi_namespace_node *node, |
535 | struct acpi_buffer *ret_buffer) |
536 | { |
537 | union acpi_operand_object *obj_desc; |
538 | acpi_status status; |
539 | |
540 | ACPI_FUNCTION_TRACE(rs_get_prs_method_data); |
541 | |
542 | /* Parameters guaranteed valid by caller */ |
543 | |
544 | /* Execute the method, no parameters */ |
545 | |
546 | status = |
547 | acpi_ut_evaluate_object(prefix_node: node, METHOD_NAME__PRS, ACPI_BTYPE_BUFFER, |
548 | return_desc: &obj_desc); |
549 | if (ACPI_FAILURE(status)) { |
550 | return_ACPI_STATUS(status); |
551 | } |
552 | |
553 | /* |
554 | * Make the call to create a resource linked list from the |
555 | * byte stream buffer that comes back from the _CRS method |
556 | * execution. |
557 | */ |
558 | status = acpi_rs_create_resource_list(aml_buffer: obj_desc, output_buffer: ret_buffer); |
559 | |
560 | /* On exit, we must delete the object returned by evaluateObject */ |
561 | |
562 | acpi_ut_remove_reference(object: obj_desc); |
563 | return_ACPI_STATUS(status); |
564 | } |
565 | |
566 | /******************************************************************************* |
567 | * |
568 | * FUNCTION: acpi_rs_get_aei_method_data |
569 | * |
570 | * PARAMETERS: node - Device node |
571 | * ret_buffer - Pointer to a buffer structure for the |
572 | * results |
573 | * |
574 | * RETURN: Status |
575 | * |
576 | * DESCRIPTION: This function is called to get the _AEI value of an object |
577 | * contained in an object specified by the handle passed in |
578 | * |
579 | * If the function fails an appropriate status will be returned |
580 | * and the contents of the callers buffer is undefined. |
581 | * |
582 | ******************************************************************************/ |
583 | |
584 | acpi_status |
585 | acpi_rs_get_aei_method_data(struct acpi_namespace_node *node, |
586 | struct acpi_buffer *ret_buffer) |
587 | { |
588 | union acpi_operand_object *obj_desc; |
589 | acpi_status status; |
590 | |
591 | ACPI_FUNCTION_TRACE(rs_get_aei_method_data); |
592 | |
593 | /* Parameters guaranteed valid by caller */ |
594 | |
595 | /* Execute the method, no parameters */ |
596 | |
597 | status = |
598 | acpi_ut_evaluate_object(prefix_node: node, METHOD_NAME__AEI, ACPI_BTYPE_BUFFER, |
599 | return_desc: &obj_desc); |
600 | if (ACPI_FAILURE(status)) { |
601 | return_ACPI_STATUS(status); |
602 | } |
603 | |
604 | /* |
605 | * Make the call to create a resource linked list from the |
606 | * byte stream buffer that comes back from the _CRS method |
607 | * execution. |
608 | */ |
609 | status = acpi_rs_create_resource_list(aml_buffer: obj_desc, output_buffer: ret_buffer); |
610 | |
611 | /* On exit, we must delete the object returned by evaluateObject */ |
612 | |
613 | acpi_ut_remove_reference(object: obj_desc); |
614 | return_ACPI_STATUS(status); |
615 | } |
616 | |
617 | /******************************************************************************* |
618 | * |
619 | * FUNCTION: acpi_rs_get_method_data |
620 | * |
621 | * PARAMETERS: handle - Handle to the containing object |
622 | * path - Path to method, relative to Handle |
623 | * ret_buffer - Pointer to a buffer structure for the |
624 | * results |
625 | * |
626 | * RETURN: Status |
627 | * |
628 | * DESCRIPTION: This function is called to get the _CRS or _PRS value of an |
629 | * object contained in an object specified by the handle passed in |
630 | * |
631 | * If the function fails an appropriate status will be returned |
632 | * and the contents of the callers buffer is undefined. |
633 | * |
634 | ******************************************************************************/ |
635 | |
636 | acpi_status |
637 | acpi_rs_get_method_data(acpi_handle handle, |
638 | const char *path, struct acpi_buffer *ret_buffer) |
639 | { |
640 | union acpi_operand_object *obj_desc; |
641 | acpi_status status; |
642 | |
643 | ACPI_FUNCTION_TRACE(rs_get_method_data); |
644 | |
645 | /* Parameters guaranteed valid by caller */ |
646 | |
647 | /* Execute the method, no parameters */ |
648 | |
649 | status = |
650 | acpi_ut_evaluate_object(ACPI_CAST_PTR |
651 | (struct acpi_namespace_node, handle), path, |
652 | ACPI_BTYPE_BUFFER, return_desc: &obj_desc); |
653 | if (ACPI_FAILURE(status)) { |
654 | return_ACPI_STATUS(status); |
655 | } |
656 | |
657 | /* |
658 | * Make the call to create a resource linked list from the |
659 | * byte stream buffer that comes back from the method |
660 | * execution. |
661 | */ |
662 | status = acpi_rs_create_resource_list(aml_buffer: obj_desc, output_buffer: ret_buffer); |
663 | |
664 | /* On exit, we must delete the object returned by evaluate_object */ |
665 | |
666 | acpi_ut_remove_reference(object: obj_desc); |
667 | return_ACPI_STATUS(status); |
668 | } |
669 | |
670 | /******************************************************************************* |
671 | * |
672 | * FUNCTION: acpi_rs_set_srs_method_data |
673 | * |
674 | * PARAMETERS: node - Device node |
675 | * in_buffer - Pointer to a buffer structure of the |
676 | * parameter |
677 | * |
678 | * RETURN: Status |
679 | * |
680 | * DESCRIPTION: This function is called to set the _SRS of an object contained |
681 | * in an object specified by the handle passed in |
682 | * |
683 | * If the function fails an appropriate status will be returned |
684 | * and the contents of the callers buffer is undefined. |
685 | * |
686 | * Note: Parameters guaranteed valid by caller |
687 | * |
688 | ******************************************************************************/ |
689 | |
690 | acpi_status |
691 | acpi_rs_set_srs_method_data(struct acpi_namespace_node *node, |
692 | struct acpi_buffer *in_buffer) |
693 | { |
694 | struct acpi_evaluate_info *info; |
695 | union acpi_operand_object *args[2]; |
696 | acpi_status status; |
697 | struct acpi_buffer buffer; |
698 | |
699 | ACPI_FUNCTION_TRACE(rs_set_srs_method_data); |
700 | |
701 | /* Allocate and initialize the evaluation information block */ |
702 | |
703 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
704 | if (!info) { |
705 | return_ACPI_STATUS(AE_NO_MEMORY); |
706 | } |
707 | |
708 | info->prefix_node = node; |
709 | info->relative_pathname = METHOD_NAME__SRS; |
710 | info->parameters = args; |
711 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
712 | |
713 | /* |
714 | * The in_buffer parameter will point to a linked list of |
715 | * resource parameters. It needs to be formatted into a |
716 | * byte stream to be sent in as an input parameter to _SRS |
717 | * |
718 | * Convert the linked list into a byte stream |
719 | */ |
720 | buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; |
721 | status = acpi_rs_create_aml_resources(resource_list: in_buffer, output_buffer: &buffer); |
722 | if (ACPI_FAILURE(status)) { |
723 | goto cleanup; |
724 | } |
725 | |
726 | /* Create and initialize the method parameter object */ |
727 | |
728 | args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
729 | if (!args[0]) { |
730 | /* |
731 | * Must free the buffer allocated above (otherwise it is freed |
732 | * later) |
733 | */ |
734 | ACPI_FREE(buffer.pointer); |
735 | status = AE_NO_MEMORY; |
736 | goto cleanup; |
737 | } |
738 | |
739 | args[0]->buffer.length = (u32) buffer.length; |
740 | args[0]->buffer.pointer = buffer.pointer; |
741 | args[0]->common.flags = AOPOBJ_DATA_VALID; |
742 | args[1] = NULL; |
743 | |
744 | /* Execute the method, no return value is expected */ |
745 | |
746 | status = acpi_ns_evaluate(info); |
747 | |
748 | /* Clean up and return the status from acpi_ns_evaluate */ |
749 | |
750 | acpi_ut_remove_reference(object: args[0]); |
751 | |
752 | cleanup: |
753 | ACPI_FREE(info); |
754 | return_ACPI_STATUS(status); |
755 | } |
756 | |