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8#include <acpi/acpi.h>
9#include "accommon.h"
10#include "acinterp.h"
11#include "acnamesp.h"
12#include "acevents.h"
13
14#define _COMPONENT ACPI_UTILITIES
15ACPI_MODULE_NAME("utdelete")
16
17
18static void acpi_ut_delete_internal_obj(union acpi_operand_object *object);
19
20static void
21acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action);
22
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35
36static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
37{
38 void *obj_pointer = NULL;
39 union acpi_operand_object *handler_desc;
40 union acpi_operand_object *second_desc;
41 union acpi_operand_object *next_desc;
42 union acpi_operand_object *start_desc;
43 union acpi_operand_object **last_obj_ptr;
44
45 ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object);
46
47 if (!object) {
48 return_VOID;
49 }
50
51
52
53
54
55 switch (object->common.type) {
56 case ACPI_TYPE_STRING:
57
58 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
59 "**** String %p, ptr %p\n", object,
60 object->string.pointer));
61
62
63
64 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
65
66
67
68 obj_pointer = object->string.pointer;
69 }
70 break;
71
72 case ACPI_TYPE_BUFFER:
73
74 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
75 "**** Buffer %p, ptr %p\n", object,
76 object->buffer.pointer));
77
78
79
80 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
81
82
83
84 obj_pointer = object->buffer.pointer;
85 }
86 break;
87
88 case ACPI_TYPE_PACKAGE:
89
90 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
91 " **** Package of count %X\n",
92 object->package.count));
93
94
95
96
97
98
99
100
101 obj_pointer = object->package.elements;
102 break;
103
104
105
106
107
108 case ACPI_TYPE_DEVICE:
109
110 if (object->device.gpe_block) {
111 (void)acpi_ev_delete_gpe_block(object->device.
112 gpe_block);
113 }
114
115
116
117 case ACPI_TYPE_PROCESSOR:
118 case ACPI_TYPE_THERMAL:
119
120
121
122 handler_desc = object->common_notify.handler;
123 while (handler_desc) {
124 next_desc = handler_desc->address_space.next;
125 acpi_ut_remove_reference(handler_desc);
126 handler_desc = next_desc;
127 }
128 break;
129
130 case ACPI_TYPE_MUTEX:
131
132 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
133 "***** Mutex %p, OS Mutex %p\n",
134 object, object->mutex.os_mutex));
135
136 if (object == acpi_gbl_global_lock_mutex) {
137
138
139
140 (void)
141 acpi_os_delete_semaphore
142 (acpi_gbl_global_lock_semaphore);
143 acpi_gbl_global_lock_semaphore = NULL;
144
145 acpi_os_delete_mutex(object->mutex.os_mutex);
146 acpi_gbl_global_lock_mutex = NULL;
147 } else {
148 acpi_ex_unlink_mutex(object);
149 acpi_os_delete_mutex(object->mutex.os_mutex);
150 }
151 break;
152
153 case ACPI_TYPE_EVENT:
154
155 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
156 "***** Event %p, OS Semaphore %p\n",
157 object, object->event.os_semaphore));
158
159 (void)acpi_os_delete_semaphore(object->event.os_semaphore);
160 object->event.os_semaphore = NULL;
161 break;
162
163 case ACPI_TYPE_METHOD:
164
165 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
166 "***** Method %p\n", object));
167
168
169
170 if (object->method.mutex) {
171 acpi_os_delete_mutex(object->method.mutex->mutex.
172 os_mutex);
173 acpi_ut_delete_object_desc(object->method.mutex);
174 object->method.mutex = NULL;
175 }
176
177 if (object->method.node) {
178 object->method.node = NULL;
179 }
180 break;
181
182 case ACPI_TYPE_REGION:
183
184 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
185 "***** Region %p\n", object));
186
187
188
189
190
191 if (!(object->region.node->flags & ANOBJ_TEMPORARY)) {
192 acpi_ut_remove_address_range(object->region.space_id,
193 object->region.node);
194 }
195
196 second_desc = acpi_ns_get_secondary_object(object);
197 if (second_desc) {
198
199
200
201
202
203 handler_desc = object->region.handler;
204 if (handler_desc) {
205 next_desc =
206 handler_desc->address_space.region_list;
207 start_desc = next_desc;
208 last_obj_ptr =
209 &handler_desc->address_space.region_list;
210
211
212
213 while (next_desc) {
214 if (next_desc == object) {
215 *last_obj_ptr =
216 next_desc->region.next;
217 break;
218 }
219
220
221
222 last_obj_ptr = &next_desc->region.next;
223 next_desc = next_desc->region.next;
224
225
226
227 if (next_desc == start_desc) {
228 ACPI_ERROR((AE_INFO,
229 "Circular region list in address handler object %p",
230 handler_desc));
231 return_VOID;
232 }
233 }
234
235 if (handler_desc->address_space.handler_flags &
236 ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
237
238
239
240 if (handler_desc->address_space.setup) {
241 (void)handler_desc->
242 address_space.setup(object,
243 ACPI_REGION_DEACTIVATE,
244 handler_desc->
245 address_space.
246 context,
247 &second_desc->
248 extra.
249 region_context);
250 }
251 }
252
253 acpi_ut_remove_reference(handler_desc);
254 }
255
256
257
258 acpi_ut_delete_object_desc(second_desc);
259 }
260 break;
261
262 case ACPI_TYPE_BUFFER_FIELD:
263
264 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
265 "***** Buffer Field %p\n", object));
266
267 second_desc = acpi_ns_get_secondary_object(object);
268 if (second_desc) {
269 acpi_ut_delete_object_desc(second_desc);
270 }
271 break;
272
273 case ACPI_TYPE_LOCAL_BANK_FIELD:
274
275 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
276 "***** Bank Field %p\n", object));
277
278 second_desc = acpi_ns_get_secondary_object(object);
279 if (second_desc) {
280 acpi_ut_delete_object_desc(second_desc);
281 }
282 break;
283
284 default:
285
286 break;
287 }
288
289
290
291 if (obj_pointer) {
292 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
293 "Deleting Object Subptr %p\n", obj_pointer));
294 ACPI_FREE(obj_pointer);
295 }
296
297
298
299 ACPI_DEBUG_PRINT_RAW((ACPI_DB_ALLOCATIONS,
300 "%s: Deleting Object %p [%s]\n",
301 ACPI_GET_FUNCTION_NAME, object,
302 acpi_ut_get_object_type_name(object)));
303
304 acpi_ut_delete_object_desc(object);
305 return_VOID;
306}
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320
321void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list)
322{
323 union acpi_operand_object **internal_obj;
324
325 ACPI_FUNCTION_ENTRY();
326
327
328
329 for (internal_obj = obj_list; *internal_obj; internal_obj++) {
330 acpi_ut_remove_reference(*internal_obj);
331 }
332
333
334
335 ACPI_FREE(obj_list);
336 return;
337}
338
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350
351
352static void
353acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
354{
355 u16 original_count;
356 u16 new_count = 0;
357 acpi_cpu_flags lock_flags;
358
359 ACPI_FUNCTION_NAME(ut_update_ref_count);
360
361 if (!object) {
362 return;
363 }
364
365
366
367
368
369 lock_flags = acpi_os_acquire_lock(acpi_gbl_reference_count_lock);
370 original_count = object->common.reference_count;
371
372
373
374 switch (action) {
375 case REF_INCREMENT:
376
377 new_count = original_count + 1;
378 object->common.reference_count = new_count;
379 acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
380
381
382
383 if (!original_count) {
384 ACPI_WARNING((AE_INFO,
385 "Obj %p, Reference Count was zero before increment\n",
386 object));
387 }
388
389 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
390 "Obj %p Type %.2X [%s] Refs %.2X [Incremented]\n",
391 object, object->common.type,
392 acpi_ut_get_object_type_name(object),
393 new_count));
394 break;
395
396 case REF_DECREMENT:
397
398
399
400 if (original_count) {
401 new_count = original_count - 1;
402 object->common.reference_count = new_count;
403 }
404
405 acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
406
407 if (!original_count) {
408 ACPI_WARNING((AE_INFO,
409 "Obj %p, Reference Count is already zero, cannot decrement\n",
410 object));
411 }
412
413 ACPI_DEBUG_PRINT_RAW((ACPI_DB_ALLOCATIONS,
414 "%s: Obj %p Type %.2X Refs %.2X [Decremented]\n",
415 ACPI_GET_FUNCTION_NAME, object,
416 object->common.type, new_count));
417
418
419
420 if (new_count == 0) {
421 acpi_ut_delete_internal_obj(object);
422 }
423 break;
424
425 default:
426
427 acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
428 ACPI_ERROR((AE_INFO, "Unknown Reference Count action (0x%X)",
429 action));
430 return;
431 }
432
433
434
435
436
437 if (new_count > ACPI_MAX_REFERENCE_COUNT) {
438 ACPI_WARNING((AE_INFO,
439 "Large Reference Count (0x%X) in object %p, Type=0x%.2X",
440 new_count, object, object->common.type));
441 }
442}
443
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464
465acpi_status
466acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
467{
468 acpi_status status = AE_OK;
469 union acpi_generic_state *state_list = NULL;
470 union acpi_operand_object *next_object = NULL;
471 union acpi_operand_object *prev_object;
472 union acpi_generic_state *state;
473 u32 i;
474
475 ACPI_FUNCTION_NAME(ut_update_object_reference);
476
477 while (object) {
478
479
480
481 if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) {
482 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
483 "Object %p is NS handle\n", object));
484 return (AE_OK);
485 }
486
487
488
489
490
491 switch (object->common.type) {
492 case ACPI_TYPE_DEVICE:
493 case ACPI_TYPE_PROCESSOR:
494 case ACPI_TYPE_POWER:
495 case ACPI_TYPE_THERMAL:
496
497
498
499
500 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
501 prev_object =
502 object->common_notify.notify_list[i];
503 while (prev_object) {
504 next_object =
505 prev_object->notify.next[i];
506 acpi_ut_update_ref_count(prev_object,
507 action);
508 prev_object = next_object;
509 }
510 }
511 break;
512
513 case ACPI_TYPE_PACKAGE:
514
515
516
517
518 for (i = 0; i < object->package.count; i++) {
519
520
521
522
523 next_object = object->package.elements[i];
524 if (!next_object) {
525 continue;
526 }
527
528 switch (next_object->common.type) {
529 case ACPI_TYPE_INTEGER:
530 case ACPI_TYPE_STRING:
531 case ACPI_TYPE_BUFFER:
532
533
534
535
536
537 acpi_ut_update_ref_count(next_object,
538 action);
539 break;
540
541 default:
542
543
544
545
546 status =
547 acpi_ut_create_update_state_and_push
548 (next_object, action, &state_list);
549 if (ACPI_FAILURE(status)) {
550 goto error_exit;
551 }
552 break;
553 }
554 }
555 next_object = NULL;
556 break;
557
558 case ACPI_TYPE_BUFFER_FIELD:
559
560 next_object = object->buffer_field.buffer_obj;
561 break;
562
563 case ACPI_TYPE_LOCAL_REGION_FIELD:
564
565 next_object = object->field.region_obj;
566 break;
567
568 case ACPI_TYPE_LOCAL_BANK_FIELD:
569
570 next_object = object->bank_field.bank_obj;
571 status =
572 acpi_ut_create_update_state_and_push(object->
573 bank_field.
574 region_obj,
575 action,
576 &state_list);
577 if (ACPI_FAILURE(status)) {
578 goto error_exit;
579 }
580 break;
581
582 case ACPI_TYPE_LOCAL_INDEX_FIELD:
583
584 next_object = object->index_field.index_obj;
585 status =
586 acpi_ut_create_update_state_and_push(object->
587 index_field.
588 data_obj,
589 action,
590 &state_list);
591 if (ACPI_FAILURE(status)) {
592 goto error_exit;
593 }
594 break;
595
596 case ACPI_TYPE_LOCAL_REFERENCE:
597
598
599
600
601
602 if ((object->reference.class == ACPI_REFCLASS_INDEX) ||
603 (object->reference.class == ACPI_REFCLASS_NAME)) {
604 next_object = object->reference.object;
605 }
606 break;
607
608 case ACPI_TYPE_REGION:
609 default:
610
611 break;
612 }
613
614
615
616
617
618
619 acpi_ut_update_ref_count(object, action);
620 object = NULL;
621
622
623
624 if (next_object) {
625 object = next_object;
626 next_object = NULL;
627 } else if (state_list) {
628 state = acpi_ut_pop_generic_state(&state_list);
629 object = state->update.object;
630 acpi_ut_delete_generic_state(state);
631 }
632 }
633
634 return (AE_OK);
635
636error_exit:
637
638 ACPI_EXCEPTION((AE_INFO, status,
639 "Could not update object reference count"));
640
641
642
643 while (state_list) {
644 state = acpi_ut_pop_generic_state(&state_list);
645 acpi_ut_delete_generic_state(state);
646 }
647
648 return (status);
649}
650
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662
663
664void acpi_ut_add_reference(union acpi_operand_object *object)
665{
666
667 ACPI_FUNCTION_NAME(ut_add_reference);
668
669
670
671 if (!acpi_ut_valid_internal_object(object)) {
672 return;
673 }
674
675 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
676 "Obj %p Current Refs=%X [To Be Incremented]\n",
677 object, object->common.reference_count));
678
679
680
681 (void)acpi_ut_update_object_reference(object, REF_INCREMENT);
682 return;
683}
684
685
686
687
688
689
690
691
692
693
694
695
696
697void acpi_ut_remove_reference(union acpi_operand_object *object)
698{
699
700 ACPI_FUNCTION_NAME(ut_remove_reference);
701
702
703
704
705
706 if (!object ||
707 (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) {
708 return;
709 }
710
711
712
713 if (!acpi_ut_valid_internal_object(object)) {
714 return;
715 }
716
717 ACPI_DEBUG_PRINT_RAW((ACPI_DB_ALLOCATIONS,
718 "%s: Obj %p Current Refs=%X [To Be Decremented]\n",
719 ACPI_GET_FUNCTION_NAME, object,
720 object->common.reference_count));
721
722
723
724
725
726
727 (void)acpi_ut_update_object_reference(object, REF_DECREMENT);
728 return;
729}
730