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44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acdispat.h"
47#include "acinterp.h"
48#include "acnamesp.h"
49#ifdef ACPI_DISASSEMBLER
50#include <acpi/acdisasm.h>
51#endif
52
53#define _COMPONENT ACPI_DISPATCHER
54ACPI_MODULE_NAME("dsmethod")
55
56
57static acpi_status
58acpi_ds_create_method_mutex(union acpi_operand_object *method_desc);
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76acpi_status
77acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
78{
79 ACPI_FUNCTION_ENTRY();
80
81
82
83 if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) {
84 return (status);
85 }
86
87
88
89 if (acpi_gbl_exception_handler) {
90
91
92
93 acpi_ex_exit_interpreter();
94
95
96
97
98
99 status = acpi_gbl_exception_handler(status,
100 walk_state->method_node ?
101 walk_state->method_node->
102 name.integer : 0,
103 walk_state->opcode,
104 walk_state->aml_offset,
105 NULL);
106 acpi_ex_enter_interpreter();
107 }
108
109 acpi_ds_clear_implicit_return(walk_state);
110
111#ifdef ACPI_DISASSEMBLER
112 if (ACPI_FAILURE(status)) {
113
114
115
116 acpi_dm_dump_method_info(status, walk_state, walk_state->op);
117 }
118#endif
119
120 return (status);
121}
122
123
124
125
126
127
128
129
130
131
132
133
134
135static acpi_status
136acpi_ds_create_method_mutex(union acpi_operand_object *method_desc)
137{
138 union acpi_operand_object *mutex_desc;
139 acpi_status status;
140
141 ACPI_FUNCTION_TRACE(ds_create_method_mutex);
142
143
144
145 mutex_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
146 if (!mutex_desc) {
147 return_ACPI_STATUS(AE_NO_MEMORY);
148 }
149
150
151
152 status = acpi_os_create_mutex(&mutex_desc->mutex.os_mutex);
153 if (ACPI_FAILURE(status)) {
154 return_ACPI_STATUS(status);
155 }
156
157 mutex_desc->mutex.sync_level = method_desc->method.sync_level;
158 method_desc->method.mutex = mutex_desc;
159 return_ACPI_STATUS(AE_OK);
160}
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179acpi_status
180acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
181 union acpi_operand_object *obj_desc,
182 struct acpi_walk_state *walk_state)
183{
184 acpi_status status = AE_OK;
185
186 ACPI_FUNCTION_TRACE_PTR(ds_begin_method_execution, method_node);
187
188 if (!method_node) {
189 return_ACPI_STATUS(AE_NULL_ENTRY);
190 }
191
192
193
194 if (obj_desc->method.thread_count == ACPI_UINT8_MAX) {
195 ACPI_ERROR((AE_INFO,
196 "Method reached maximum reentrancy limit (255)"));
197 return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
198 }
199
200
201
202
203 if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) {
204
205
206
207
208
209 if (!obj_desc->method.mutex) {
210 status = acpi_ds_create_method_mutex(obj_desc);
211 if (ACPI_FAILURE(status)) {
212 return_ACPI_STATUS(status);
213 }
214 }
215
216
217
218
219
220
221
222
223 if (walk_state &&
224 (walk_state->thread->current_sync_level >
225 obj_desc->method.mutex->mutex.sync_level)) {
226 ACPI_ERROR((AE_INFO,
227 "Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%u)",
228 acpi_ut_get_node_name(method_node),
229 walk_state->thread->current_sync_level));
230
231 return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
232 }
233
234
235
236
237
238 if (!walk_state ||
239 !obj_desc->method.mutex->mutex.thread_id ||
240 (walk_state->thread->thread_id !=
241 obj_desc->method.mutex->mutex.thread_id)) {
242
243
244
245
246 status =
247 acpi_ex_system_wait_mutex(obj_desc->method.mutex->
248 mutex.os_mutex,
249 ACPI_WAIT_FOREVER);
250 if (ACPI_FAILURE(status)) {
251 return_ACPI_STATUS(status);
252 }
253
254
255
256 if (walk_state) {
257 obj_desc->method.mutex->mutex.
258 original_sync_level =
259 walk_state->thread->current_sync_level;
260
261 obj_desc->method.mutex->mutex.thread_id =
262 walk_state->thread->thread_id;
263 walk_state->thread->current_sync_level =
264 obj_desc->method.sync_level;
265 } else {
266 obj_desc->method.mutex->mutex.
267 original_sync_level =
268 obj_desc->method.mutex->mutex.sync_level;
269 }
270 }
271
272
273
274 obj_desc->method.mutex->mutex.acquisition_depth++;
275 }
276
277
278
279
280
281
282 if (!obj_desc->method.owner_id) {
283 status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
284 if (ACPI_FAILURE(status)) {
285 goto cleanup;
286 }
287 }
288
289
290
291
292
293 obj_desc->method.thread_count++;
294 return_ACPI_STATUS(status);
295
296 cleanup:
297
298
299 if (obj_desc->method.mutex) {
300 acpi_os_release_mutex(obj_desc->method.mutex->mutex.os_mutex);
301 }
302 return_ACPI_STATUS(status);
303}
304
305
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316
317
318
319acpi_status
320acpi_ds_call_control_method(struct acpi_thread_state *thread,
321 struct acpi_walk_state *this_walk_state,
322 union acpi_parse_object *op)
323{
324 acpi_status status;
325 struct acpi_namespace_node *method_node;
326 struct acpi_walk_state *next_walk_state = NULL;
327 union acpi_operand_object *obj_desc;
328 struct acpi_evaluate_info *info;
329 u32 i;
330
331 ACPI_FUNCTION_TRACE_PTR(ds_call_control_method, this_walk_state);
332
333 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
334 "Calling method %p, currentstate=%p\n",
335 this_walk_state->prev_op, this_walk_state));
336
337
338
339
340 method_node = this_walk_state->method_call_node;
341 if (!method_node) {
342 return_ACPI_STATUS(AE_NULL_ENTRY);
343 }
344
345 obj_desc = acpi_ns_get_attached_object(method_node);
346 if (!obj_desc) {
347 return_ACPI_STATUS(AE_NULL_OBJECT);
348 }
349
350
351
352 status = acpi_ds_begin_method_execution(method_node, obj_desc,
353 this_walk_state);
354 if (ACPI_FAILURE(status)) {
355 return_ACPI_STATUS(status);
356 }
357
358
359
360 next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id,
361 NULL, obj_desc, thread);
362 if (!next_walk_state) {
363 status = AE_NO_MEMORY;
364 goto cleanup;
365 }
366
367
368
369
370
371
372 this_walk_state->operands[this_walk_state->num_operands] = NULL;
373
374
375
376
377
378
379 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
380 if (!info) {
381 return_ACPI_STATUS(AE_NO_MEMORY);
382 }
383
384 info->parameters = &this_walk_state->operands[0];
385
386 status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node,
387 obj_desc->method.aml_start,
388 obj_desc->method.aml_length, info,
389 ACPI_IMODE_EXECUTE);
390
391 ACPI_FREE(info);
392 if (ACPI_FAILURE(status)) {
393 goto cleanup;
394 }
395
396
397
398
399
400 for (i = 0; i < obj_desc->method.param_count; i++) {
401 acpi_ut_remove_reference(this_walk_state->operands[i]);
402 this_walk_state->operands[i] = NULL;
403 }
404
405
406
407 this_walk_state->num_operands = 0;
408
409 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
410 "**** Begin nested execution of [%4.4s] **** WalkState=%p\n",
411 method_node->name.ascii, next_walk_state));
412
413
414
415 if (obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
416 status =
417 obj_desc->method.dispatch.implementation(next_walk_state);
418 if (status == AE_OK) {
419 status = AE_CTRL_TERMINATE;
420 }
421 }
422
423 return_ACPI_STATUS(status);
424
425 cleanup:
426
427
428
429 acpi_ds_terminate_control_method(obj_desc, next_walk_state);
430 if (next_walk_state) {
431 acpi_ds_delete_walk_state(next_walk_state);
432 }
433
434 return_ACPI_STATUS(status);
435}
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451acpi_status
452acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
453 union acpi_operand_object *return_desc)
454{
455 acpi_status status;
456 int same_as_implicit_return;
457
458 ACPI_FUNCTION_TRACE_PTR(ds_restart_control_method, walk_state);
459
460 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
461 "****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n",
462 acpi_ut_get_node_name(walk_state->method_node),
463 walk_state->method_call_op, return_desc));
464
465 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
466 " ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n",
467 walk_state->return_used,
468 walk_state->results, walk_state));
469
470
471
472 if (return_desc) {
473
474
475
476 same_as_implicit_return =
477 (walk_state->implicit_return_obj == return_desc);
478
479
480
481 if (walk_state->return_used) {
482
483
484
485 status = acpi_ds_result_push(return_desc, walk_state);
486 if (ACPI_FAILURE(status)) {
487 acpi_ut_remove_reference(return_desc);
488 return_ACPI_STATUS(status);
489 }
490
491
492
493
494
495 walk_state->return_desc = return_desc;
496 }
497
498
499
500
501
502
503
504
505
506
507
508
509 else if (!acpi_ds_do_implicit_return
510 (return_desc, walk_state, FALSE)
511 || same_as_implicit_return) {
512
513
514
515
516
517 acpi_ut_remove_reference(return_desc);
518 }
519 }
520
521 return_ACPI_STATUS(AE_OK);
522}
523
524
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530
531
532
533
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535
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538
539
540
541void
542acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
543 struct acpi_walk_state *walk_state)
544{
545
546 ACPI_FUNCTION_TRACE_PTR(ds_terminate_control_method, walk_state);
547
548
549
550 if (!method_desc) {
551 return_VOID;
552 }
553
554 if (walk_state) {
555
556
557
558 acpi_ds_method_data_delete_all(walk_state);
559
560
561
562
563
564 if (method_desc->method.mutex) {
565
566
567
568 method_desc->method.mutex->mutex.acquisition_depth--;
569 if (!method_desc->method.mutex->mutex.acquisition_depth) {
570 walk_state->thread->current_sync_level =
571 method_desc->method.mutex->mutex.
572 original_sync_level;
573
574 acpi_os_release_mutex(method_desc->method.
575 mutex->mutex.os_mutex);
576 method_desc->method.mutex->mutex.thread_id = 0;
577 }
578 }
579
580
581
582
583
584
585
586
587
588 if (!(method_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL)
589 && (method_desc->method.thread_count == 1)) {
590
591
592
593 acpi_ns_delete_namespace_subtree(walk_state->
594 method_node);
595
596
597
598
599
600
601
602
603 if (method_desc->method.
604 info_flags & ACPI_METHOD_MODIFIED_NAMESPACE) {
605 acpi_ns_delete_namespace_by_owner(method_desc->
606 method.
607 owner_id);
608 method_desc->method.info_flags &=
609 ~ACPI_METHOD_MODIFIED_NAMESPACE;
610 }
611 }
612 }
613
614
615
616 if (method_desc->method.thread_count) {
617 method_desc->method.thread_count--;
618 } else {
619 ACPI_ERROR((AE_INFO, "Invalid zero thread count in method"));
620 }
621
622
623
624 if (method_desc->method.thread_count) {
625
626
627
628
629 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
630 "*** Completed execution of one thread, %u threads remaining\n",
631 method_desc->method.thread_count));
632 } else {
633
634
635
636
637
638
639
640
641
642
643
644
645 if (method_desc->method.
646 info_flags & ACPI_METHOD_SERIALIZED_PENDING) {
647 if (walk_state) {
648 ACPI_INFO((AE_INFO,
649 "Marking method %4.4s as Serialized because of AE_ALREADY_EXISTS error",
650 walk_state->method_node->name.
651 ascii));
652 }
653
654
655
656
657
658
659
660
661
662
663
664
665 method_desc->method.info_flags &=
666 ~ACPI_METHOD_SERIALIZED_PENDING;
667 method_desc->method.info_flags |=
668 ACPI_METHOD_SERIALIZED;
669 method_desc->method.sync_level = 0;
670 }
671
672
673
674 if (!
675 (method_desc->method.
676 info_flags & ACPI_METHOD_MODULE_LEVEL)) {
677 acpi_ut_release_owner_id(&method_desc->method.owner_id);
678 }
679 }
680
681 return_VOID;
682}
683