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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utdelete - object deletion and reference count utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acinterp.h" | |
47 | #include "acnamesp.h" | |
48 | #include "acevents.h" | |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 51 | ACPI_MODULE_NAME("utdelete") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local prototypes */ |
4be44fcd | 54 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object); |
44f6c012 RM |
55 | |
56 | static void | |
4be44fcd | 57 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action); |
1da177e4 LT |
58 | |
59 | /******************************************************************************* | |
60 | * | |
61 | * FUNCTION: acpi_ut_delete_internal_obj | |
62 | * | |
ba494bee | 63 | * PARAMETERS: object - Object to be deleted |
1da177e4 LT |
64 | * |
65 | * RETURN: None | |
66 | * | |
67 | * DESCRIPTION: Low level object deletion, after reference counts have been | |
68 | * updated (All reference counts, including sub-objects!) | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
4be44fcd | 72 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) |
1da177e4 | 73 | { |
4be44fcd LB |
74 | void *obj_pointer = NULL; |
75 | union acpi_operand_object *handler_desc; | |
76 | union acpi_operand_object *second_desc; | |
77 | union acpi_operand_object *next_desc; | |
f953529f | 78 | union acpi_operand_object *start_desc; |
3362a6ba | 79 | union acpi_operand_object **last_obj_ptr; |
1da177e4 | 80 | |
b229cf92 | 81 | ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); |
1da177e4 LT |
82 | |
83 | if (!object) { | |
84 | return_VOID; | |
85 | } | |
86 | ||
87 | /* | |
88 | * Must delete or free any pointers within the object that are not | |
89 | * actual ACPI objects (for example, a raw buffer pointer). | |
90 | */ | |
3371c19c | 91 | switch (object->common.type) { |
1da177e4 LT |
92 | case ACPI_TYPE_STRING: |
93 | ||
4be44fcd LB |
94 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
95 | "**** String %p, ptr %p\n", object, | |
96 | object->string.pointer)); | |
1da177e4 LT |
97 | |
98 | /* Free the actual string buffer */ | |
99 | ||
100 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 101 | |
1da177e4 LT |
102 | /* But only if it is NOT a pointer into an ACPI table */ |
103 | ||
104 | obj_pointer = object->string.pointer; | |
105 | } | |
106 | break; | |
107 | ||
1da177e4 LT |
108 | case ACPI_TYPE_BUFFER: |
109 | ||
4be44fcd LB |
110 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
111 | "**** Buffer %p, ptr %p\n", object, | |
112 | object->buffer.pointer)); | |
1da177e4 LT |
113 | |
114 | /* Free the actual buffer */ | |
115 | ||
116 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 117 | |
1da177e4 LT |
118 | /* But only if it is NOT a pointer into an ACPI table */ |
119 | ||
120 | obj_pointer = object->buffer.pointer; | |
121 | } | |
122 | break; | |
123 | ||
1da177e4 LT |
124 | case ACPI_TYPE_PACKAGE: |
125 | ||
4be44fcd LB |
126 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
127 | " **** Package of count %X\n", | |
128 | object->package.count)); | |
1da177e4 LT |
129 | |
130 | /* | |
131 | * Elements of the package are not handled here, they are deleted | |
132 | * separately | |
133 | */ | |
134 | ||
135 | /* Free the (variable length) element pointer array */ | |
136 | ||
137 | obj_pointer = object->package.elements; | |
138 | break; | |
139 | ||
2843ae77 BM |
140 | /* |
141 | * These objects have a possible list of notify handlers. | |
142 | * Device object also may have a GPE block. | |
143 | */ | |
1da177e4 LT |
144 | case ACPI_TYPE_DEVICE: |
145 | ||
146 | if (object->device.gpe_block) { | |
4be44fcd LB |
147 | (void)acpi_ev_delete_gpe_block(object->device. |
148 | gpe_block); | |
1da177e4 LT |
149 | } |
150 | ||
2843ae77 BM |
151 | /*lint -fallthrough */ |
152 | ||
153 | case ACPI_TYPE_PROCESSOR: | |
154 | case ACPI_TYPE_THERMAL: | |
155 | ||
86ed4bc8 | 156 | /* Walk the address handler list for this object */ |
1da177e4 | 157 | |
2843ae77 | 158 | handler_desc = object->common_notify.handler; |
1da177e4 LT |
159 | while (handler_desc) { |
160 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 161 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
162 | handler_desc = next_desc; |
163 | } | |
164 | break; | |
165 | ||
1da177e4 LT |
166 | case ACPI_TYPE_MUTEX: |
167 | ||
4be44fcd | 168 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
169 | "***** Mutex %p, OS Mutex %p\n", |
170 | object, object->mutex.os_mutex)); | |
171 | ||
ba886cd4 | 172 | if (object == acpi_gbl_global_lock_mutex) { |
c81da666 BM |
173 | |
174 | /* Global Lock has extra semaphore */ | |
967440e3 BM |
175 | |
176 | (void) | |
177 | acpi_os_delete_semaphore | |
178 | (acpi_gbl_global_lock_semaphore); | |
179 | acpi_gbl_global_lock_semaphore = NULL; | |
c81da666 BM |
180 | |
181 | acpi_os_delete_mutex(object->mutex.os_mutex); | |
182 | acpi_gbl_global_lock_mutex = NULL; | |
183 | } else { | |
262a7a28 | 184 | acpi_ex_unlink_mutex(object); |
c81da666 | 185 | acpi_os_delete_mutex(object->mutex.os_mutex); |
967440e3 | 186 | } |
1da177e4 LT |
187 | break; |
188 | ||
1da177e4 LT |
189 | case ACPI_TYPE_EVENT: |
190 | ||
4be44fcd | 191 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
192 | "***** Event %p, OS Semaphore %p\n", |
193 | object, object->event.os_semaphore)); | |
1da177e4 | 194 | |
967440e3 BM |
195 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
196 | object->event.os_semaphore = NULL; | |
1da177e4 LT |
197 | break; |
198 | ||
1da177e4 LT |
199 | case ACPI_TYPE_METHOD: |
200 | ||
4be44fcd LB |
201 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
202 | "***** Method %p\n", object)); | |
1da177e4 | 203 | |
967440e3 | 204 | /* Delete the method mutex if it exists */ |
1da177e4 | 205 | |
967440e3 BM |
206 | if (object->method.mutex) { |
207 | acpi_os_delete_mutex(object->method.mutex->mutex. | |
208 | os_mutex); | |
209 | acpi_ut_delete_object_desc(object->method.mutex); | |
210 | object->method.mutex = NULL; | |
1da177e4 | 211 | } |
1fad8738 | 212 | |
07b9c912 LZ |
213 | if (object->method.node) { |
214 | object->method.node = NULL; | |
215 | } | |
1da177e4 LT |
216 | break; |
217 | ||
1da177e4 LT |
218 | case ACPI_TYPE_REGION: |
219 | ||
4be44fcd LB |
220 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
221 | "***** Region %p\n", object)); | |
1da177e4 | 222 | |
f654c0fe LM |
223 | /* |
224 | * Update address_range list. However, only permanent regions | |
225 | * are installed in this list. (Not created within a method) | |
226 | */ | |
227 | if (!(object->region.node->flags & ANOBJ_TEMPORARY)) { | |
228 | acpi_ut_remove_address_range(object->region.space_id, | |
229 | object->region.node); | |
230 | } | |
a5fe1a03 | 231 | |
4be44fcd | 232 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
233 | if (second_desc) { |
234 | /* | |
235 | * Free the region_context if and only if the handler is one of the | |
236 | * default handlers -- and therefore, we created the context object | |
237 | * locally, it was not created by an external caller. | |
238 | */ | |
239 | handler_desc = object->region.handler; | |
240 | if (handler_desc) { | |
3362a6ba LM |
241 | next_desc = |
242 | handler_desc->address_space.region_list; | |
f953529f | 243 | start_desc = next_desc; |
3362a6ba LM |
244 | last_obj_ptr = |
245 | &handler_desc->address_space.region_list; | |
246 | ||
f953529f | 247 | /* Remove the region object from the handler list */ |
3362a6ba LM |
248 | |
249 | while (next_desc) { | |
250 | if (next_desc == object) { | |
251 | *last_obj_ptr = | |
252 | next_desc->region.next; | |
253 | break; | |
254 | } | |
255 | ||
f953529f | 256 | /* Walk the linked list of handlers */ |
3362a6ba LM |
257 | |
258 | last_obj_ptr = &next_desc->region.next; | |
259 | next_desc = next_desc->region.next; | |
f953529f BM |
260 | |
261 | /* Prevent infinite loop if list is corrupted */ | |
262 | ||
263 | if (next_desc == start_desc) { | |
264 | ACPI_ERROR((AE_INFO, | |
265 | "Circular region list in address handler object %p", | |
266 | handler_desc)); | |
267 | return_VOID; | |
268 | } | |
3362a6ba LM |
269 | } |
270 | ||
61686124 | 271 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 272 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
273 | |
274 | /* Deactivate region and free region context */ | |
275 | ||
276 | if (handler_desc->address_space.setup) { | |
277 | (void)handler_desc-> | |
278 | address_space.setup(object, | |
279 | ACPI_REGION_DEACTIVATE, | |
280 | handler_desc-> | |
281 | address_space. | |
282 | context, | |
283 | &second_desc-> | |
284 | extra. | |
285 | region_context); | |
286 | } | |
1da177e4 LT |
287 | } |
288 | ||
4be44fcd | 289 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
290 | } |
291 | ||
292 | /* Now we can free the Extra object */ | |
293 | ||
4be44fcd | 294 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
295 | } |
296 | break; | |
297 | ||
1da177e4 LT |
298 | case ACPI_TYPE_BUFFER_FIELD: |
299 | ||
4be44fcd LB |
300 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
301 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 302 | |
4be44fcd | 303 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 304 | if (second_desc) { |
ef805d95 LM |
305 | acpi_ut_delete_object_desc(second_desc); |
306 | } | |
307 | break; | |
308 | ||
309 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
310 | ||
311 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
312 | "***** Bank Field %p\n", object)); | |
313 | ||
314 | second_desc = acpi_ns_get_secondary_object(object); | |
315 | if (second_desc) { | |
4be44fcd | 316 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
317 | } |
318 | break; | |
319 | ||
1da177e4 | 320 | default: |
1d1ea1b7 | 321 | |
1da177e4 LT |
322 | break; |
323 | } | |
324 | ||
325 | /* Free any allocated memory (pointer within the object) found above */ | |
326 | ||
327 | if (obj_pointer) { | |
4be44fcd LB |
328 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
329 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 330 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Now the object can be safely deleted */ | |
334 | ||
4be44fcd LB |
335 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
336 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 337 | |
4be44fcd | 338 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
339 | return_VOID; |
340 | } | |
341 | ||
1da177e4 LT |
342 | /******************************************************************************* |
343 | * | |
344 | * FUNCTION: acpi_ut_delete_internal_object_list | |
345 | * | |
44f6c012 | 346 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
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 | ||
4be44fcd | 355 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 356 | { |
4be44fcd | 357 | union acpi_operand_object **internal_obj; |
1da177e4 | 358 | |
c8d586f8 | 359 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
360 | |
361 | /* Walk the null-terminated internal list */ | |
362 | ||
363 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 364 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
365 | } |
366 | ||
367 | /* Free the combined parameter pointer list and object array */ | |
368 | ||
8313524a | 369 | ACPI_FREE(obj_list); |
0e770b32 | 370 | return; |
1da177e4 LT |
371 | } |
372 | ||
1da177e4 LT |
373 | /******************************************************************************* |
374 | * | |
375 | * FUNCTION: acpi_ut_update_ref_count | |
376 | * | |
ba494bee | 377 | * PARAMETERS: object - Object whose ref count is to be updated |
58892c96 | 378 | * action - What to do (REF_INCREMENT or REF_DECREMENT) |
1da177e4 | 379 | * |
58892c96 | 380 | * RETURN: None. Sets new reference count within the object |
1da177e4 | 381 | * |
58892c96 | 382 | * DESCRIPTION: Modify the reference count for an internal acpi object |
1da177e4 LT |
383 | * |
384 | ******************************************************************************/ | |
385 | ||
386 | static void | |
4be44fcd | 387 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 388 | { |
58892c96 BM |
389 | u16 original_count; |
390 | u16 new_count = 0; | |
391 | acpi_cpu_flags lock_flags; | |
1da177e4 | 392 | |
b229cf92 | 393 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
394 | |
395 | if (!object) { | |
396 | return; | |
397 | } | |
398 | ||
1da177e4 | 399 | /* |
58892c96 BM |
400 | * Always get the reference count lock. Note: Interpreter and/or |
401 | * Namespace is not always locked when this function is called. | |
1da177e4 | 402 | */ |
58892c96 BM |
403 | lock_flags = acpi_os_acquire_lock(acpi_gbl_reference_count_lock); |
404 | original_count = object->common.reference_count; | |
405 | ||
406 | /* Perform the reference count action (increment, decrement) */ | |
407 | ||
1da177e4 | 408 | switch (action) { |
1da177e4 LT |
409 | case REF_INCREMENT: |
410 | ||
58892c96 | 411 | new_count = original_count + 1; |
1da177e4 | 412 | object->common.reference_count = new_count; |
58892c96 BM |
413 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
414 | ||
415 | /* The current reference count should never be zero here */ | |
416 | ||
417 | if (!original_count) { | |
418 | ACPI_WARNING((AE_INFO, | |
419 | "Obj %p, Reference Count was zero before increment\n", | |
420 | object)); | |
421 | } | |
1da177e4 | 422 | |
4be44fcd | 423 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
58892c96 BM |
424 | "Obj %p Type %.2X Refs %.2X [Incremented]\n", |
425 | object, object->common.type, new_count)); | |
1da177e4 LT |
426 | break; |
427 | ||
1da177e4 LT |
428 | case REF_DECREMENT: |
429 | ||
58892c96 | 430 | /* The current reference count must be non-zero */ |
1da177e4 | 431 | |
58892c96 BM |
432 | if (original_count) { |
433 | new_count = original_count - 1; | |
434 | object->common.reference_count = new_count; | |
1da177e4 LT |
435 | } |
436 | ||
58892c96 BM |
437 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
438 | ||
439 | if (!original_count) { | |
440 | ACPI_WARNING((AE_INFO, | |
441 | "Obj %p, Reference Count is already zero, cannot decrement\n", | |
442 | object)); | |
1da177e4 LT |
443 | } |
444 | ||
58892c96 BM |
445 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
446 | "Obj %p Type %.2X Refs %.2X [Decremented]\n", | |
447 | object, object->common.type, new_count)); | |
448 | ||
449 | /* Actually delete the object on a reference count of zero */ | |
450 | ||
1da177e4 | 451 | if (new_count == 0) { |
4be44fcd | 452 | acpi_ut_delete_internal_obj(object); |
1da177e4 | 453 | } |
1da177e4 LT |
454 | break; |
455 | ||
1da177e4 LT |
456 | default: |
457 | ||
58892c96 BM |
458 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
459 | ACPI_ERROR((AE_INFO, "Unknown Reference Count action (0x%X)", | |
460 | action)); | |
461 | return; | |
1da177e4 LT |
462 | } |
463 | ||
464 | /* | |
465 | * Sanity check the reference count, for debug purposes only. | |
466 | * (A deleted object will have a huge reference count) | |
467 | */ | |
58892c96 | 468 | if (new_count > ACPI_MAX_REFERENCE_COUNT) { |
b8e4d893 | 469 | ACPI_WARNING((AE_INFO, |
58892c96 BM |
470 | "Large Reference Count (0x%X) in object %p, Type=0x%.2X", |
471 | new_count, object, object->common.type)); | |
1da177e4 | 472 | } |
1da177e4 LT |
473 | } |
474 | ||
1da177e4 LT |
475 | /******************************************************************************* |
476 | * | |
477 | * FUNCTION: acpi_ut_update_object_reference | |
478 | * | |
ba494bee | 479 | * PARAMETERS: object - Increment ref count for this object |
1da177e4 | 480 | * and all sub-objects |
60f3deb5 | 481 | * action - Either REF_INCREMENT or REF_DECREMENT |
1da177e4 LT |
482 | * |
483 | * RETURN: Status | |
484 | * | |
485 | * DESCRIPTION: Increment the object reference count | |
486 | * | |
487 | * Object references are incremented when: | |
488 | * 1) An object is attached to a Node (namespace object) | |
489 | * 2) An object is copied (all subobjects must be incremented) | |
490 | * | |
491 | * Object references are decremented when: | |
492 | * 1) An object is detached from an Node | |
493 | * | |
494 | ******************************************************************************/ | |
495 | ||
496 | acpi_status | |
4119532c | 497 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
1da177e4 | 498 | { |
4be44fcd LB |
499 | acpi_status status = AE_OK; |
500 | union acpi_generic_state *state_list = NULL; | |
501 | union acpi_operand_object *next_object = NULL; | |
86ed4bc8 | 502 | union acpi_operand_object *prev_object; |
4be44fcd | 503 | union acpi_generic_state *state; |
67a119f9 | 504 | u32 i; |
1da177e4 | 505 | |
0e770b32 | 506 | ACPI_FUNCTION_NAME(ut_update_object_reference); |
1da177e4 | 507 | |
f9f4601f | 508 | while (object) { |
52fc0b02 | 509 | |
f9f4601f | 510 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 511 | |
4be44fcd LB |
512 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
513 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
514 | "Object %p is NS handle\n", object)); | |
0e770b32 | 515 | return (AE_OK); |
f9f4601f | 516 | } |
1da177e4 LT |
517 | |
518 | /* | |
1fad8738 BM |
519 | * All sub-objects must have their reference count incremented |
520 | * also. Different object types have different subobjects. | |
1da177e4 | 521 | */ |
3371c19c | 522 | switch (object->common.type) { |
1da177e4 | 523 | case ACPI_TYPE_DEVICE: |
f6dd9221 BM |
524 | case ACPI_TYPE_PROCESSOR: |
525 | case ACPI_TYPE_POWER: | |
526 | case ACPI_TYPE_THERMAL: | |
86ed4bc8 BM |
527 | /* |
528 | * Update the notify objects for these types (if present) | |
529 | * Two lists, system and device notify handlers. | |
530 | */ | |
531 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { | |
532 | prev_object = | |
533 | object->common_notify.notify_list[i]; | |
534 | while (prev_object) { | |
535 | next_object = | |
536 | prev_object->notify.next[i]; | |
537 | acpi_ut_update_ref_count(prev_object, | |
538 | action); | |
539 | prev_object = next_object; | |
540 | } | |
541 | } | |
1da177e4 LT |
542 | break; |
543 | ||
1da177e4 | 544 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 545 | /* |
f9f4601f RM |
546 | * We must update all the sub-objects of the package, |
547 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
548 | */ |
549 | for (i = 0; i < object->package.count; i++) { | |
550 | /* | |
53938551 CG |
551 | * Null package elements are legal and can be simply |
552 | * ignored. | |
1da177e4 | 553 | */ |
53938551 CG |
554 | next_object = object->package.elements[i]; |
555 | if (!next_object) { | |
556 | continue; | |
557 | } | |
558 | ||
559 | switch (next_object->common.type) { | |
560 | case ACPI_TYPE_INTEGER: | |
561 | case ACPI_TYPE_STRING: | |
562 | case ACPI_TYPE_BUFFER: | |
563 | /* | |
564 | * For these very simple sub-objects, we can just | |
565 | * update the reference count here and continue. | |
566 | * Greatly increases performance of this operation. | |
567 | */ | |
568 | acpi_ut_update_ref_count(next_object, | |
569 | action); | |
570 | break; | |
571 | ||
572 | default: | |
573 | /* | |
574 | * For complex sub-objects, push them onto the stack | |
575 | * for later processing (this eliminates recursion.) | |
576 | */ | |
577 | status = | |
578 | acpi_ut_create_update_state_and_push | |
579 | (next_object, action, &state_list); | |
580 | if (ACPI_FAILURE(status)) { | |
581 | goto error_exit; | |
582 | } | |
583 | break; | |
1da177e4 | 584 | } |
1da177e4 | 585 | } |
53938551 | 586 | next_object = NULL; |
1da177e4 LT |
587 | break; |
588 | ||
1da177e4 LT |
589 | case ACPI_TYPE_BUFFER_FIELD: |
590 | ||
f9f4601f | 591 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
592 | break; |
593 | ||
1da177e4 LT |
594 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
595 | ||
f9f4601f RM |
596 | next_object = object->field.region_obj; |
597 | break; | |
1da177e4 LT |
598 | |
599 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
600 | ||
f9f4601f | 601 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
602 | status = |
603 | acpi_ut_create_update_state_and_push(object-> | |
604 | bank_field. | |
605 | region_obj, | |
606 | action, | |
607 | &state_list); | |
608 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
609 | goto error_exit; |
610 | } | |
1da177e4 LT |
611 | break; |
612 | ||
1da177e4 LT |
613 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
614 | ||
f9f4601f | 615 | next_object = object->index_field.index_obj; |
4be44fcd LB |
616 | status = |
617 | acpi_ut_create_update_state_and_push(object-> | |
618 | index_field. | |
619 | data_obj, | |
620 | action, | |
621 | &state_list); | |
622 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
623 | goto error_exit; |
624 | } | |
1da177e4 LT |
625 | break; |
626 | ||
1da177e4 | 627 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 | 628 | /* |
9e41d93c BM |
629 | * The target of an Index (a package, string, or buffer) or a named |
630 | * reference must track changes to the ref count of the index or | |
631 | * target object. | |
1da177e4 | 632 | */ |
1044f1f6 BM |
633 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
634 | (object->reference.class == ACPI_REFCLASS_NAME)) { | |
f9f4601f | 635 | next_object = object->reference.object; |
1da177e4 LT |
636 | } |
637 | break; | |
638 | ||
1da177e4 LT |
639 | case ACPI_TYPE_REGION: |
640 | default: | |
1d1ea1b7 | 641 | |
4119532c | 642 | break; /* No subobjects for all other types */ |
1da177e4 LT |
643 | } |
644 | ||
645 | /* | |
4119532c | 646 | * Now we can update the count in the main object. This can only |
1da177e4 LT |
647 | * happen after we update the sub-objects in case this causes the |
648 | * main object to be deleted. | |
649 | */ | |
4be44fcd | 650 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 651 | object = NULL; |
1da177e4 LT |
652 | |
653 | /* Move on to the next object to be updated */ | |
654 | ||
f9f4601f RM |
655 | if (next_object) { |
656 | object = next_object; | |
657 | next_object = NULL; | |
4be44fcd LB |
658 | } else if (state_list) { |
659 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 660 | object = state->update.object; |
4be44fcd | 661 | acpi_ut_delete_generic_state(state); |
f9f4601f | 662 | } |
1da177e4 LT |
663 | } |
664 | ||
0e770b32 | 665 | return (AE_OK); |
1da177e4 | 666 | |
10622bf8 | 667 | error_exit: |
1da177e4 | 668 | |
b8e4d893 BM |
669 | ACPI_EXCEPTION((AE_INFO, status, |
670 | "Could not update object reference count")); | |
1da177e4 | 671 | |
cf058bd1 LM |
672 | /* Free any stacked Update State objects */ |
673 | ||
674 | while (state_list) { | |
675 | state = acpi_ut_pop_generic_state(&state_list); | |
676 | acpi_ut_delete_generic_state(state); | |
677 | } | |
678 | ||
0e770b32 | 679 | return (status); |
1da177e4 LT |
680 | } |
681 | ||
1da177e4 LT |
682 | /******************************************************************************* |
683 | * | |
684 | * FUNCTION: acpi_ut_add_reference | |
685 | * | |
ba494bee | 686 | * PARAMETERS: object - Object whose reference count is to be |
44f6c012 | 687 | * incremented |
1da177e4 LT |
688 | * |
689 | * RETURN: None | |
690 | * | |
691 | * DESCRIPTION: Add one reference to an ACPI object | |
692 | * | |
693 | ******************************************************************************/ | |
694 | ||
4be44fcd | 695 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
696 | { |
697 | ||
0e770b32 | 698 | ACPI_FUNCTION_NAME(ut_add_reference); |
1da177e4 LT |
699 | |
700 | /* Ensure that we have a valid object */ | |
701 | ||
4be44fcd | 702 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 703 | return; |
1da177e4 LT |
704 | } |
705 | ||
4be44fcd LB |
706 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
707 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
708 | object, object->common.reference_count)); | |
1da177e4 LT |
709 | |
710 | /* Increment the reference count */ | |
711 | ||
4be44fcd | 712 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
0e770b32 | 713 | return; |
1da177e4 LT |
714 | } |
715 | ||
1da177e4 LT |
716 | /******************************************************************************* |
717 | * | |
718 | * FUNCTION: acpi_ut_remove_reference | |
719 | * | |
ba494bee | 720 | * PARAMETERS: object - Object whose ref count will be decremented |
1da177e4 LT |
721 | * |
722 | * RETURN: None | |
723 | * | |
724 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
725 | * | |
726 | ******************************************************************************/ | |
727 | ||
4be44fcd | 728 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
729 | { |
730 | ||
0e770b32 | 731 | ACPI_FUNCTION_NAME(ut_remove_reference); |
1da177e4 LT |
732 | |
733 | /* | |
4119532c BM |
734 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
735 | * each caller from having to check. Also, ignore NS nodes. | |
1da177e4 LT |
736 | */ |
737 | if (!object || | |
4be44fcd | 738 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
0e770b32 | 739 | return; |
1da177e4 LT |
740 | } |
741 | ||
742 | /* Ensure that we have a valid object */ | |
743 | ||
4be44fcd | 744 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 745 | return; |
1da177e4 LT |
746 | } |
747 | ||
4be44fcd LB |
748 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
749 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
750 | object, object->common.reference_count)); | |
1da177e4 LT |
751 | |
752 | /* | |
753 | * Decrement the reference count, and only actually delete the object | |
4119532c | 754 | * if the reference count becomes 0. (Must also decrement the ref count |
1da177e4 LT |
755 | * of all subobjects!) |
756 | */ | |
4be44fcd | 757 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
0e770b32 | 758 | return; |
1da177e4 | 759 | } |