1 /*******************************************************************************
2 *
3 * Module Name: utdelete - object deletion and reference count utilities
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2011, 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.
101 * Must delete or free any pointers within the object that are not
102 * actual ACPI objects (for example, a raw buffer pointer).
103 */
104 switch (Object->Common.Type)
105 {
106 case ACPI_TYPE_STRING:
107
108 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
109 Object, Object->String.Pointer));
110
111 /* Free the actual string buffer */
112
113 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
114 {
115 /* But only if it is NOT a pointer into an ACPI table */
116
117 ObjPointer = Object->String.Pointer;
118 }
119 break;
120
121
122 case ACPI_TYPE_BUFFER:
123
124 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
125 Object, Object->Buffer.Pointer));
126
127 /* Free the actual buffer */
128
129 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
130 {
131 /* But only if it is NOT a pointer into an ACPI table */
132
133 ObjPointer = Object->Buffer.Pointer;
134 }
135 break;
136
137
138 case ACPI_TYPE_PACKAGE:
139
140 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
141 Object->Package.Count));
142
143 /*
144 * Elements of the package are not handled here, they are deleted
145 * separately
146 */
147
148 /* Free the (variable length) element pointer array */
149
150 ObjPointer = Object->Package.Elements;
151 break;
152
153
154 /*
155 * These objects have a possible list of notify handlers.
156 * Device object also may have a GPE block.
157 */
158 case ACPI_TYPE_DEVICE:
159
160 if (Object->Device.GpeBlock)
161 {
162 (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
163 }
164
165 /*lint -fallthrough */
166
167 case ACPI_TYPE_PROCESSOR:
168 case ACPI_TYPE_THERMAL:
169
170 /* Walk the notify handler list for this object */
171
172 HandlerDesc = Object->CommonNotify.Handler;
173 while (HandlerDesc)
174 {
175 NextDesc = HandlerDesc->AddressSpace.Next;
176 AcpiUtRemoveReference (HandlerDesc);
177 HandlerDesc = NextDesc;
178 }
179 break;
180
181
182 case ACPI_TYPE_MUTEX:
183
184 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
185 "***** Mutex %p, OS Mutex %p\n",
186 Object, Object->Mutex.OsMutex));
187
188 if (Object == AcpiGbl_GlobalLockMutex)
189 {
190 /* Global Lock has extra semaphore */
191
192 (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore);
193 AcpiGbl_GlobalLockSemaphore = NULL;
194
195 AcpiOsDeleteMutex (Object->Mutex.OsMutex);
196 AcpiGbl_GlobalLockMutex = NULL;
197 }
198 else
199 {
200 AcpiExUnlinkMutex (Object);
201 AcpiOsDeleteMutex (Object->Mutex.OsMutex);
202 }
203 break;
204
205
206 case ACPI_TYPE_EVENT:
207
208 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
209 "***** Event %p, OS Semaphore %p\n",
210 Object, Object->Event.OsSemaphore));
211
212 (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore);
213 Object->Event.OsSemaphore = NULL;
214 break;
215
216
217 case ACPI_TYPE_METHOD:
218
219 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
220 "***** Method %p\n", Object));
221
222 /* Delete the method mutex if it exists */
223
224 if (Object->Method.Mutex)
225 {
226 AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex);
227 AcpiUtDeleteObjectDesc (Object->Method.Mutex);
228 Object->Method.Mutex = NULL;
229 }
230 break;
231
232
233 case ACPI_TYPE_REGION:
234
235 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
236 "***** Region %p\n", Object));
237
238 SecondDesc = AcpiNsGetSecondaryObject (Object);
239 if (SecondDesc)
240 {
241 /*
242 * Free the RegionContext if and only if the handler is one of the
243 * default handlers -- and therefore, we created the context object
244 * locally, it was not created by an external caller.
245 */
246 HandlerDesc = Object->Region.Handler;
247 if (HandlerDesc)
248 {
249 NextDesc = HandlerDesc->AddressSpace.RegionList;
250 LastObjPtr = &HandlerDesc->AddressSpace.RegionList;
251
252 /* Remove the region object from the handler's list */
253
254 while (NextDesc)
255 {
256 if (NextDesc == Object)
257 {
271 /* Deactivate region and free region context */
272
273 if (HandlerDesc->AddressSpace.Setup)
274 {
275 (void) HandlerDesc->AddressSpace.Setup (Object,
276 ACPI_REGION_DEACTIVATE,
277 HandlerDesc->AddressSpace.Context,
278 &SecondDesc->Extra.RegionContext);
279 }
280 }
281
282 AcpiUtRemoveReference (HandlerDesc);
283 }
284
285 /* Now we can free the Extra object */
286
287 AcpiUtDeleteObjectDesc (SecondDesc);
288 }
289 break;
290
291
292 case ACPI_TYPE_BUFFER_FIELD:
293
294 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
295 "***** Buffer Field %p\n", Object));
296
297 SecondDesc = AcpiNsGetSecondaryObject (Object);
298 if (SecondDesc)
299 {
300 AcpiUtDeleteObjectDesc (SecondDesc);
301 }
302 break;
303
304
305 case ACPI_TYPE_LOCAL_BANK_FIELD:
306
307 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
308 "***** Bank Field %p\n", Object));
309
310 SecondDesc = AcpiNsGetSecondaryObject (Object);
311 if (SecondDesc)
312 {
313 AcpiUtDeleteObjectDesc (SecondDesc);
314 }
315 break;
316
317
318 default:
319 break;
320 }
321
322 /* Free any allocated memory (pointer within the object) found above */
323
324 if (ObjPointer)
325 {
326 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
327 ObjPointer));
328 ACPI_FREE (ObjPointer);
329 }
330
331 /* Now the object can be safely deleted */
332
333 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
334 Object, AcpiUtGetObjectTypeName (Object)));
335
336 AcpiUtDeleteObjectDesc (Object);
337 return_VOID;
338 }
341 /*******************************************************************************
342 *
343 * FUNCTION: AcpiUtDeleteInternalObjectList
344 *
345 * PARAMETERS: ObjList - Pointer to the list to be deleted
346 *
347 * RETURN: None
348 *
349 * DESCRIPTION: This function deletes an internal object list, including both
350 * simple objects and package objects
351 *
352 ******************************************************************************/
353
354 void
355 AcpiUtDeleteInternalObjectList (
356 ACPI_OPERAND_OBJECT **ObjList)
357 {
358 ACPI_OPERAND_OBJECT **InternalObj;
359
360
361 ACPI_FUNCTION_TRACE (UtDeleteInternalObjectList);
362
363
364 /* Walk the null-terminated internal list */
365
366 for (InternalObj = ObjList; *InternalObj; InternalObj++)
367 {
368 AcpiUtRemoveReference (*InternalObj);
369 }
370
371 /* Free the combined parameter pointer list and object array */
372
373 ACPI_FREE (ObjList);
374 return_VOID;
375 }
376
377
378 /*******************************************************************************
379 *
380 * FUNCTION: AcpiUtUpdateRefCount
381 *
382 * PARAMETERS: Object - Object whose ref count is to be updated
383 * Action - What to do
384 *
385 * RETURN: New ref count
386 *
387 * DESCRIPTION: Modify the ref count and return it.
388 *
389 ******************************************************************************/
390
391 static void
392 AcpiUtUpdateRefCount (
393 ACPI_OPERAND_OBJECT *Object,
394 UINT32 Action)
395 {
396 UINT16 Count;
397 UINT16 NewCount;
398
399
400 ACPI_FUNCTION_NAME (UtUpdateRefCount);
401
402
403 if (!Object)
404 {
405 return;
406 }
407
408 Count = Object->Common.ReferenceCount;
409 NewCount = Count;
410
411 /*
412 * Perform the reference count action (increment, decrement, force delete)
413 */
414 switch (Action)
415 {
416 case REF_INCREMENT:
417
418 NewCount++;
419 Object->Common.ReferenceCount = NewCount;
420
421 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
422 "Obj %p Refs=%X, [Incremented]\n",
423 Object, NewCount));
424 break;
425
426 case REF_DECREMENT:
427
428 if (Count < 1)
429 {
430 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
431 "Obj %p Refs=%X, can't decrement! (Set to 0)\n",
432 Object, NewCount));
433
434 NewCount = 0;
435 }
436 else
437 {
438 NewCount--;
439
440 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
441 "Obj %p Refs=%X, [Decremented]\n",
442 Object, NewCount));
443 }
444
445 if (Object->Common.Type == ACPI_TYPE_METHOD)
446 {
447 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
448 "Method Obj %p Refs=%X, [Decremented]\n", Object, NewCount));
449 }
450
451 Object->Common.ReferenceCount = NewCount;
452 if (NewCount == 0)
453 {
454 AcpiUtDeleteInternalObj (Object);
455 }
456 break;
457
458 case REF_FORCE_DELETE:
459
460 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
461 "Obj %p Refs=%X, Force delete! (Set to 0)\n", Object, Count));
462
463 NewCount = 0;
464 Object->Common.ReferenceCount = NewCount;
465 AcpiUtDeleteInternalObj (Object);
466 break;
467
468 default:
469
470 ACPI_ERROR ((AE_INFO, "Unknown action (0x%X)", Action));
471 break;
472 }
473
474 /*
475 * Sanity check the reference count, for debug purposes only.
476 * (A deleted object will have a huge reference count)
477 */
478 if (Count > ACPI_MAX_REFERENCE_COUNT)
479 {
480 ACPI_WARNING ((AE_INFO,
481 "Large Reference Count (0x%X) in object %p", Count, Object));
482 }
483 }
484
485
486 /*******************************************************************************
487 *
488 * FUNCTION: AcpiUtUpdateObjectReference
489 *
490 * PARAMETERS: Object - Increment ref count for this object
491 * and all sub-objects
492 * Action - Either REF_INCREMENT or REF_DECREMENT or
493 * REF_FORCE_DELETE
494 *
495 * RETURN: Status
496 *
497 * DESCRIPTION: Increment the object reference count
498 *
499 * Object references are incremented when:
500 * 1) An object is attached to a Node (namespace object)
501 * 2) An object is copied (all subobjects must be incremented)
502 *
503 * Object references are decremented when:
504 * 1) An object is detached from an Node
505 *
506 ******************************************************************************/
507
508 ACPI_STATUS
509 AcpiUtUpdateObjectReference (
510 ACPI_OPERAND_OBJECT *Object,
511 UINT16 Action)
512 {
513 ACPI_STATUS Status = AE_OK;
514 ACPI_GENERIC_STATE *StateList = NULL;
515 ACPI_OPERAND_OBJECT *NextObject = NULL;
516 ACPI_GENERIC_STATE *State;
517 UINT32 i;
518
519
520 ACPI_FUNCTION_TRACE_PTR (UtUpdateObjectReference, Object);
521
522
523 while (Object)
524 {
525 /* Make sure that this isn't a namespace handle */
526
527 if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
528 {
529 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
530 "Object %p is NS handle\n", Object));
531 return_ACPI_STATUS (AE_OK);
532 }
533
534 /*
535 * All sub-objects must have their reference count incremented also.
536 * Different object types have different subobjects.
537 */
538 switch (Object->Common.Type)
539 {
540 case ACPI_TYPE_DEVICE:
541 case ACPI_TYPE_PROCESSOR:
542 case ACPI_TYPE_POWER:
543 case ACPI_TYPE_THERMAL:
544
545 /* Update the notify objects for these types (if present) */
546
547 AcpiUtUpdateRefCount (Object->CommonNotify.SystemNotify, Action);
548 AcpiUtUpdateRefCount (Object->CommonNotify.DeviceNotify, Action);
549 break;
550
551 case ACPI_TYPE_PACKAGE:
552 /*
553 * We must update all the sub-objects of the package,
554 * each of whom may have their own sub-objects.
555 */
556 for (i = 0; i < Object->Package.Count; i++)
557 {
558 /*
559 * Push each element onto the stack for later processing.
560 * Note: There can be null elements within the package,
561 * these are simply ignored
562 */
563 Status = AcpiUtCreateUpdateStateAndPush (
564 Object->Package.Elements[i], Action, &StateList);
565 if (ACPI_FAILURE (Status))
566 {
567 goto ErrorExit;
568 }
569 }
570 break;
571
572 case ACPI_TYPE_BUFFER_FIELD:
573
574 NextObject = Object->BufferField.BufferObj;
575 break;
576
577 case ACPI_TYPE_LOCAL_REGION_FIELD:
578
579 NextObject = Object->Field.RegionObj;
580 break;
581
582 case ACPI_TYPE_LOCAL_BANK_FIELD:
583
584 NextObject = Object->BankField.BankObj;
585 Status = AcpiUtCreateUpdateStateAndPush (
586 Object->BankField.RegionObj, Action, &StateList);
587 if (ACPI_FAILURE (Status))
588 {
589 goto ErrorExit;
599 {
600 goto ErrorExit;
601 }
602 break;
603
604 case ACPI_TYPE_LOCAL_REFERENCE:
605 /*
606 * The target of an Index (a package, string, or buffer) or a named
607 * reference must track changes to the ref count of the index or
608 * target object.
609 */
610 if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
611 (Object->Reference.Class== ACPI_REFCLASS_NAME))
612 {
613 NextObject = Object->Reference.Object;
614 }
615 break;
616
617 case ACPI_TYPE_REGION:
618 default:
619 break; /* No subobjects for all other types */
620 }
621
622 /*
623 * Now we can update the count in the main object. This can only
624 * happen after we update the sub-objects in case this causes the
625 * main object to be deleted.
626 */
627 AcpiUtUpdateRefCount (Object, Action);
628 Object = NULL;
629
630 /* Move on to the next object to be updated */
631
632 if (NextObject)
633 {
634 Object = NextObject;
635 NextObject = NULL;
636 }
637 else if (StateList)
638 {
639 State = AcpiUtPopGenericState (&StateList);
640 Object = State->Update.Object;
641 AcpiUtDeleteGenericState (State);
642 }
643 }
644
645 return_ACPI_STATUS (AE_OK);
646
647
648 ErrorExit:
649
650 ACPI_EXCEPTION ((AE_INFO, Status,
651 "Could not update object reference count"));
652
653 /* Free any stacked Update State objects */
654
655 while (StateList)
656 {
657 State = AcpiUtPopGenericState (&StateList);
658 AcpiUtDeleteGenericState (State);
659 }
660
661 return_ACPI_STATUS (Status);
662 }
663
664
665 /*******************************************************************************
666 *
667 * FUNCTION: AcpiUtAddReference
668 *
669 * PARAMETERS: Object - Object whose reference count is to be
670 * incremented
671 *
672 * RETURN: None
673 *
674 * DESCRIPTION: Add one reference to an ACPI object
675 *
676 ******************************************************************************/
677
678 void
679 AcpiUtAddReference (
680 ACPI_OPERAND_OBJECT *Object)
681 {
682
683 ACPI_FUNCTION_TRACE_PTR (UtAddReference, Object);
684
685
686 /* Ensure that we have a valid object */
687
688 if (!AcpiUtValidInternalObject (Object))
689 {
690 return_VOID;
691 }
692
693 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
694 "Obj %p Current Refs=%X [To Be Incremented]\n",
695 Object, Object->Common.ReferenceCount));
696
697 /* Increment the reference count */
698
699 (void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT);
700 return_VOID;
701 }
702
703
704 /*******************************************************************************
705 *
706 * FUNCTION: AcpiUtRemoveReference
707 *
708 * PARAMETERS: Object - Object whose ref count will be decremented
709 *
710 * RETURN: None
711 *
712 * DESCRIPTION: Decrement the reference count of an ACPI internal object
713 *
714 ******************************************************************************/
715
716 void
717 AcpiUtRemoveReference (
718 ACPI_OPERAND_OBJECT *Object)
719 {
720
721 ACPI_FUNCTION_TRACE_PTR (UtRemoveReference, Object);
722
723
724 /*
725 * Allow a NULL pointer to be passed in, just ignore it. This saves
726 * each caller from having to check. Also, ignore NS nodes.
727 *
728 */
729 if (!Object ||
730 (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED))
731
732 {
733 return_VOID;
734 }
735
736 /* Ensure that we have a valid object */
737
738 if (!AcpiUtValidInternalObject (Object))
739 {
740 return_VOID;
741 }
742
743 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
744 "Obj %p Current Refs=%X [To Be Decremented]\n",
745 Object, Object->Common.ReferenceCount));
746
747 /*
748 * Decrement the reference count, and only actually delete the object
749 * if the reference count becomes 0. (Must also decrement the ref count
750 * of all subobjects!)
751 */
752 (void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT);
753 return_VOID;
754 }
755
756
|
1 /*******************************************************************************
2 *
3 * Module Name: utdelete - object deletion and reference count utilities
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
101 * Must delete or free any pointers within the object that are not
102 * actual ACPI objects (for example, a raw buffer pointer).
103 */
104 switch (Object->Common.Type)
105 {
106 case ACPI_TYPE_STRING:
107
108 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
109 Object, Object->String.Pointer));
110
111 /* Free the actual string buffer */
112
113 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
114 {
115 /* But only if it is NOT a pointer into an ACPI table */
116
117 ObjPointer = Object->String.Pointer;
118 }
119 break;
120
121 case ACPI_TYPE_BUFFER:
122
123 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
124 Object, Object->Buffer.Pointer));
125
126 /* Free the actual buffer */
127
128 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
129 {
130 /* But only if it is NOT a pointer into an ACPI table */
131
132 ObjPointer = Object->Buffer.Pointer;
133 }
134 break;
135
136 case ACPI_TYPE_PACKAGE:
137
138 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
139 Object->Package.Count));
140
141 /*
142 * Elements of the package are not handled here, they are deleted
143 * separately
144 */
145
146 /* Free the (variable length) element pointer array */
147
148 ObjPointer = Object->Package.Elements;
149 break;
150
151 /*
152 * These objects have a possible list of notify handlers.
153 * Device object also may have a GPE block.
154 */
155 case ACPI_TYPE_DEVICE:
156
157 if (Object->Device.GpeBlock)
158 {
159 (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
160 }
161
162 /*lint -fallthrough */
163
164 case ACPI_TYPE_PROCESSOR:
165 case ACPI_TYPE_THERMAL:
166
167 /* Walk the address handler list for this object */
168
169 HandlerDesc = Object->CommonNotify.Handler;
170 while (HandlerDesc)
171 {
172 NextDesc = HandlerDesc->AddressSpace.Next;
173 AcpiUtRemoveReference (HandlerDesc);
174 HandlerDesc = NextDesc;
175 }
176 break;
177
178 case ACPI_TYPE_MUTEX:
179
180 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
181 "***** Mutex %p, OS Mutex %p\n",
182 Object, Object->Mutex.OsMutex));
183
184 if (Object == AcpiGbl_GlobalLockMutex)
185 {
186 /* Global Lock has extra semaphore */
187
188 (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore);
189 AcpiGbl_GlobalLockSemaphore = NULL;
190
191 AcpiOsDeleteMutex (Object->Mutex.OsMutex);
192 AcpiGbl_GlobalLockMutex = NULL;
193 }
194 else
195 {
196 AcpiExUnlinkMutex (Object);
197 AcpiOsDeleteMutex (Object->Mutex.OsMutex);
198 }
199 break;
200
201 case ACPI_TYPE_EVENT:
202
203 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
204 "***** Event %p, OS Semaphore %p\n",
205 Object, Object->Event.OsSemaphore));
206
207 (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore);
208 Object->Event.OsSemaphore = NULL;
209 break;
210
211 case ACPI_TYPE_METHOD:
212
213 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
214 "***** Method %p\n", Object));
215
216 /* Delete the method mutex if it exists */
217
218 if (Object->Method.Mutex)
219 {
220 AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex);
221 AcpiUtDeleteObjectDesc (Object->Method.Mutex);
222 Object->Method.Mutex = NULL;
223 }
224 break;
225
226 case ACPI_TYPE_REGION:
227
228 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
229 "***** Region %p\n", Object));
230
231 /*
232 * Update AddressRange list. However, only permanent regions
233 * are installed in this list. (Not created within a method)
234 */
235 if (!(Object->Region.Node->Flags & ANOBJ_TEMPORARY))
236 {
237 AcpiUtRemoveAddressRange (Object->Region.SpaceId,
238 Object->Region.Node);
239 }
240
241 SecondDesc = AcpiNsGetSecondaryObject (Object);
242 if (SecondDesc)
243 {
244 /*
245 * Free the RegionContext if and only if the handler is one of the
246 * default handlers -- and therefore, we created the context object
247 * locally, it was not created by an external caller.
248 */
249 HandlerDesc = Object->Region.Handler;
250 if (HandlerDesc)
251 {
252 NextDesc = HandlerDesc->AddressSpace.RegionList;
253 LastObjPtr = &HandlerDesc->AddressSpace.RegionList;
254
255 /* Remove the region object from the handler's list */
256
257 while (NextDesc)
258 {
259 if (NextDesc == Object)
260 {
274 /* Deactivate region and free region context */
275
276 if (HandlerDesc->AddressSpace.Setup)
277 {
278 (void) HandlerDesc->AddressSpace.Setup (Object,
279 ACPI_REGION_DEACTIVATE,
280 HandlerDesc->AddressSpace.Context,
281 &SecondDesc->Extra.RegionContext);
282 }
283 }
284
285 AcpiUtRemoveReference (HandlerDesc);
286 }
287
288 /* Now we can free the Extra object */
289
290 AcpiUtDeleteObjectDesc (SecondDesc);
291 }
292 break;
293
294 case ACPI_TYPE_BUFFER_FIELD:
295
296 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
297 "***** Buffer Field %p\n", Object));
298
299 SecondDesc = AcpiNsGetSecondaryObject (Object);
300 if (SecondDesc)
301 {
302 AcpiUtDeleteObjectDesc (SecondDesc);
303 }
304 break;
305
306 case ACPI_TYPE_LOCAL_BANK_FIELD:
307
308 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
309 "***** Bank Field %p\n", Object));
310
311 SecondDesc = AcpiNsGetSecondaryObject (Object);
312 if (SecondDesc)
313 {
314 AcpiUtDeleteObjectDesc (SecondDesc);
315 }
316 break;
317
318 default:
319
320 break;
321 }
322
323 /* Free any allocated memory (pointer within the object) found above */
324
325 if (ObjPointer)
326 {
327 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
328 ObjPointer));
329 ACPI_FREE (ObjPointer);
330 }
331
332 /* Now the object can be safely deleted */
333
334 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
335 Object, AcpiUtGetObjectTypeName (Object)));
336
337 AcpiUtDeleteObjectDesc (Object);
338 return_VOID;
339 }
342 /*******************************************************************************
343 *
344 * FUNCTION: AcpiUtDeleteInternalObjectList
345 *
346 * PARAMETERS: ObjList - Pointer to the list to be deleted
347 *
348 * RETURN: None
349 *
350 * DESCRIPTION: This function deletes an internal object list, including both
351 * simple objects and package objects
352 *
353 ******************************************************************************/
354
355 void
356 AcpiUtDeleteInternalObjectList (
357 ACPI_OPERAND_OBJECT **ObjList)
358 {
359 ACPI_OPERAND_OBJECT **InternalObj;
360
361
362 ACPI_FUNCTION_ENTRY ();
363
364
365 /* Walk the null-terminated internal list */
366
367 for (InternalObj = ObjList; *InternalObj; InternalObj++)
368 {
369 AcpiUtRemoveReference (*InternalObj);
370 }
371
372 /* Free the combined parameter pointer list and object array */
373
374 ACPI_FREE (ObjList);
375 return;
376 }
377
378
379 /*******************************************************************************
380 *
381 * FUNCTION: AcpiUtUpdateRefCount
382 *
383 * PARAMETERS: Object - Object whose ref count is to be updated
384 * Action - What to do (REF_INCREMENT or REF_DECREMENT)
385 *
386 * RETURN: None. Sets new reference count within the object
387 *
388 * DESCRIPTION: Modify the reference count for an internal acpi object
389 *
390 ******************************************************************************/
391
392 static void
393 AcpiUtUpdateRefCount (
394 ACPI_OPERAND_OBJECT *Object,
395 UINT32 Action)
396 {
397 UINT16 OriginalCount;
398 UINT16 NewCount = 0;
399 ACPI_CPU_FLAGS LockFlags;
400
401
402 ACPI_FUNCTION_NAME (UtUpdateRefCount);
403
404
405 if (!Object)
406 {
407 return;
408 }
409
410 /*
411 * Always get the reference count lock. Note: Interpreter and/or
412 * Namespace is not always locked when this function is called.
413 */
414 LockFlags = AcpiOsAcquireLock (AcpiGbl_ReferenceCountLock);
415 OriginalCount = Object->Common.ReferenceCount;
416
417 /* Perform the reference count action (increment, decrement) */
418
419 switch (Action)
420 {
421 case REF_INCREMENT:
422
423 NewCount = OriginalCount + 1;
424 Object->Common.ReferenceCount = NewCount;
425 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
426
427 /* The current reference count should never be zero here */
428
429 if (!OriginalCount)
430 {
431 ACPI_WARNING ((AE_INFO,
432 "Obj %p, Reference Count was zero before increment\n",
433 Object));
434 }
435
436 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
437 "Obj %p Type %.2X Refs %.2X [Incremented]\n",
438 Object, Object->Common.Type, NewCount));
439 break;
440
441 case REF_DECREMENT:
442
443 /* The current reference count must be non-zero */
444
445 if (OriginalCount)
446 {
447 NewCount = OriginalCount - 1;
448 Object->Common.ReferenceCount = NewCount;
449 }
450
451 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
452
453 if (!OriginalCount)
454 {
455 ACPI_WARNING ((AE_INFO,
456 "Obj %p, Reference Count is already zero, cannot decrement\n",
457 Object));
458 }
459
460 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
461 "Obj %p Type %.2X Refs %.2X [Decremented]\n",
462 Object, Object->Common.Type, NewCount));
463
464 /* Actually delete the object on a reference count of zero */
465
466 if (NewCount == 0)
467 {
468 AcpiUtDeleteInternalObj (Object);
469 }
470 break;
471
472 default:
473
474 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
475 ACPI_ERROR ((AE_INFO, "Unknown Reference Count action (0x%X)",
476 Action));
477 return;
478 }
479
480 /*
481 * Sanity check the reference count, for debug purposes only.
482 * (A deleted object will have a huge reference count)
483 */
484 if (NewCount > ACPI_MAX_REFERENCE_COUNT)
485 {
486 ACPI_WARNING ((AE_INFO,
487 "Large Reference Count (0x%X) in object %p, Type=0x%.2X",
488 NewCount, Object, Object->Common.Type));
489 }
490 }
491
492
493 /*******************************************************************************
494 *
495 * FUNCTION: AcpiUtUpdateObjectReference
496 *
497 * PARAMETERS: Object - Increment ref count for this object
498 * and all sub-objects
499 * Action - Either REF_INCREMENT or REF_DECREMENT
500 *
501 * RETURN: Status
502 *
503 * DESCRIPTION: Increment the object reference count
504 *
505 * Object references are incremented when:
506 * 1) An object is attached to a Node (namespace object)
507 * 2) An object is copied (all subobjects must be incremented)
508 *
509 * Object references are decremented when:
510 * 1) An object is detached from an Node
511 *
512 ******************************************************************************/
513
514 ACPI_STATUS
515 AcpiUtUpdateObjectReference (
516 ACPI_OPERAND_OBJECT *Object,
517 UINT16 Action)
518 {
519 ACPI_STATUS Status = AE_OK;
520 ACPI_GENERIC_STATE *StateList = NULL;
521 ACPI_OPERAND_OBJECT *NextObject = NULL;
522 ACPI_OPERAND_OBJECT *PrevObject;
523 ACPI_GENERIC_STATE *State;
524 UINT32 i;
525
526
527 ACPI_FUNCTION_NAME (UtUpdateObjectReference);
528
529
530 while (Object)
531 {
532 /* Make sure that this isn't a namespace handle */
533
534 if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
535 {
536 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
537 "Object %p is NS handle\n", Object));
538 return (AE_OK);
539 }
540
541 /*
542 * All sub-objects must have their reference count incremented also.
543 * Different object types have different subobjects.
544 */
545 switch (Object->Common.Type)
546 {
547 case ACPI_TYPE_DEVICE:
548 case ACPI_TYPE_PROCESSOR:
549 case ACPI_TYPE_POWER:
550 case ACPI_TYPE_THERMAL:
551 /*
552 * Update the notify objects for these types (if present)
553 * Two lists, system and device notify handlers.
554 */
555 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
556 {
557 PrevObject = Object->CommonNotify.NotifyList[i];
558 while (PrevObject)
559 {
560 NextObject = PrevObject->Notify.Next[i];
561 AcpiUtUpdateRefCount (PrevObject, Action);
562 PrevObject = NextObject;
563 }
564 }
565 break;
566
567 case ACPI_TYPE_PACKAGE:
568 /*
569 * We must update all the sub-objects of the package,
570 * each of whom may have their own sub-objects.
571 */
572 for (i = 0; i < Object->Package.Count; i++)
573 {
574 /*
575 * Null package elements are legal and can be simply
576 * ignored.
577 */
578 NextObject = Object->Package.Elements[i];
579 if (!NextObject)
580 {
581 continue;
582 }
583
584 switch (NextObject->Common.Type)
585 {
586 case ACPI_TYPE_INTEGER:
587 case ACPI_TYPE_STRING:
588 case ACPI_TYPE_BUFFER:
589 /*
590 * For these very simple sub-objects, we can just
591 * update the reference count here and continue.
592 * Greatly increases performance of this operation.
593 */
594 AcpiUtUpdateRefCount (NextObject, Action);
595 break;
596
597 default:
598 /*
599 * For complex sub-objects, push them onto the stack
600 * for later processing (this eliminates recursion.)
601 */
602 Status = AcpiUtCreateUpdateStateAndPush (
603 NextObject, Action, &StateList);
604 if (ACPI_FAILURE (Status))
605 {
606 goto ErrorExit;
607 }
608 break;
609 }
610 }
611 NextObject = NULL;
612 break;
613
614 case ACPI_TYPE_BUFFER_FIELD:
615
616 NextObject = Object->BufferField.BufferObj;
617 break;
618
619 case ACPI_TYPE_LOCAL_REGION_FIELD:
620
621 NextObject = Object->Field.RegionObj;
622 break;
623
624 case ACPI_TYPE_LOCAL_BANK_FIELD:
625
626 NextObject = Object->BankField.BankObj;
627 Status = AcpiUtCreateUpdateStateAndPush (
628 Object->BankField.RegionObj, Action, &StateList);
629 if (ACPI_FAILURE (Status))
630 {
631 goto ErrorExit;
641 {
642 goto ErrorExit;
643 }
644 break;
645
646 case ACPI_TYPE_LOCAL_REFERENCE:
647 /*
648 * The target of an Index (a package, string, or buffer) or a named
649 * reference must track changes to the ref count of the index or
650 * target object.
651 */
652 if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
653 (Object->Reference.Class== ACPI_REFCLASS_NAME))
654 {
655 NextObject = Object->Reference.Object;
656 }
657 break;
658
659 case ACPI_TYPE_REGION:
660 default:
661
662 break; /* No subobjects for all other types */
663 }
664
665 /*
666 * Now we can update the count in the main object. This can only
667 * happen after we update the sub-objects in case this causes the
668 * main object to be deleted.
669 */
670 AcpiUtUpdateRefCount (Object, Action);
671 Object = NULL;
672
673 /* Move on to the next object to be updated */
674
675 if (NextObject)
676 {
677 Object = NextObject;
678 NextObject = NULL;
679 }
680 else if (StateList)
681 {
682 State = AcpiUtPopGenericState (&StateList);
683 Object = State->Update.Object;
684 AcpiUtDeleteGenericState (State);
685 }
686 }
687
688 return (AE_OK);
689
690
691 ErrorExit:
692
693 ACPI_EXCEPTION ((AE_INFO, Status,
694 "Could not update object reference count"));
695
696 /* Free any stacked Update State objects */
697
698 while (StateList)
699 {
700 State = AcpiUtPopGenericState (&StateList);
701 AcpiUtDeleteGenericState (State);
702 }
703
704 return (Status);
705 }
706
707
708 /*******************************************************************************
709 *
710 * FUNCTION: AcpiUtAddReference
711 *
712 * PARAMETERS: Object - Object whose reference count is to be
713 * incremented
714 *
715 * RETURN: None
716 *
717 * DESCRIPTION: Add one reference to an ACPI object
718 *
719 ******************************************************************************/
720
721 void
722 AcpiUtAddReference (
723 ACPI_OPERAND_OBJECT *Object)
724 {
725
726 ACPI_FUNCTION_NAME (UtAddReference);
727
728
729 /* Ensure that we have a valid object */
730
731 if (!AcpiUtValidInternalObject (Object))
732 {
733 return;
734 }
735
736 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
737 "Obj %p Current Refs=%X [To Be Incremented]\n",
738 Object, Object->Common.ReferenceCount));
739
740 /* Increment the reference count */
741
742 (void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT);
743 return;
744 }
745
746
747 /*******************************************************************************
748 *
749 * FUNCTION: AcpiUtRemoveReference
750 *
751 * PARAMETERS: Object - Object whose ref count will be decremented
752 *
753 * RETURN: None
754 *
755 * DESCRIPTION: Decrement the reference count of an ACPI internal object
756 *
757 ******************************************************************************/
758
759 void
760 AcpiUtRemoveReference (
761 ACPI_OPERAND_OBJECT *Object)
762 {
763
764 ACPI_FUNCTION_NAME (UtRemoveReference);
765
766
767 /*
768 * Allow a NULL pointer to be passed in, just ignore it. This saves
769 * each caller from having to check. Also, ignore NS nodes.
770 */
771 if (!Object ||
772 (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED))
773
774 {
775 return;
776 }
777
778 /* Ensure that we have a valid object */
779
780 if (!AcpiUtValidInternalObject (Object))
781 {
782 return;
783 }
784
785 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
786 "Obj %p Current Refs=%X [To Be Decremented]\n",
787 Object, Object->Common.ReferenceCount));
788
789 /*
790 * Decrement the reference count, and only actually delete the object
791 * if the reference count becomes 0. (Must also decrement the ref count
792 * of all subobjects!)
793 */
794 (void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT);
795 return;
796 }
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