Commit | Line | Data |
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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utdelete - object deletion and reference count utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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; | |
3362a6ba | 78 | union acpi_operand_object **last_obj_ptr; |
1da177e4 | 79 | |
b229cf92 | 80 | ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); |
1da177e4 LT |
81 | |
82 | if (!object) { | |
83 | return_VOID; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Must delete or free any pointers within the object that are not | |
88 | * actual ACPI objects (for example, a raw buffer pointer). | |
89 | */ | |
3371c19c | 90 | switch (object->common.type) { |
1da177e4 LT |
91 | case ACPI_TYPE_STRING: |
92 | ||
4be44fcd LB |
93 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
94 | "**** String %p, ptr %p\n", object, | |
95 | object->string.pointer)); | |
1da177e4 LT |
96 | |
97 | /* Free the actual string buffer */ | |
98 | ||
99 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 100 | |
1da177e4 LT |
101 | /* But only if it is NOT a pointer into an ACPI table */ |
102 | ||
103 | obj_pointer = object->string.pointer; | |
104 | } | |
105 | break; | |
106 | ||
1da177e4 LT |
107 | case ACPI_TYPE_BUFFER: |
108 | ||
4be44fcd LB |
109 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
110 | "**** Buffer %p, ptr %p\n", object, | |
111 | object->buffer.pointer)); | |
1da177e4 LT |
112 | |
113 | /* Free the actual buffer */ | |
114 | ||
115 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 116 | |
1da177e4 LT |
117 | /* But only if it is NOT a pointer into an ACPI table */ |
118 | ||
119 | obj_pointer = object->buffer.pointer; | |
120 | } | |
121 | break; | |
122 | ||
1da177e4 LT |
123 | case ACPI_TYPE_PACKAGE: |
124 | ||
4be44fcd LB |
125 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
126 | " **** Package of count %X\n", | |
127 | object->package.count)); | |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Elements of the package are not handled here, they are deleted | |
131 | * separately | |
132 | */ | |
133 | ||
134 | /* Free the (variable length) element pointer array */ | |
135 | ||
136 | obj_pointer = object->package.elements; | |
137 | break; | |
138 | ||
2843ae77 BM |
139 | /* |
140 | * These objects have a possible list of notify handlers. | |
141 | * Device object also may have a GPE block. | |
142 | */ | |
1da177e4 LT |
143 | case ACPI_TYPE_DEVICE: |
144 | ||
145 | if (object->device.gpe_block) { | |
4be44fcd LB |
146 | (void)acpi_ev_delete_gpe_block(object->device. |
147 | gpe_block); | |
1da177e4 LT |
148 | } |
149 | ||
2843ae77 BM |
150 | /*lint -fallthrough */ |
151 | ||
152 | case ACPI_TYPE_PROCESSOR: | |
153 | case ACPI_TYPE_THERMAL: | |
154 | ||
86ed4bc8 | 155 | /* Walk the address handler list for this object */ |
1da177e4 | 156 | |
2843ae77 | 157 | handler_desc = object->common_notify.handler; |
1da177e4 LT |
158 | while (handler_desc) { |
159 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 160 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
161 | handler_desc = next_desc; |
162 | } | |
163 | break; | |
164 | ||
1da177e4 LT |
165 | case ACPI_TYPE_MUTEX: |
166 | ||
4be44fcd | 167 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
168 | "***** Mutex %p, OS Mutex %p\n", |
169 | object, object->mutex.os_mutex)); | |
170 | ||
ba886cd4 | 171 | if (object == acpi_gbl_global_lock_mutex) { |
c81da666 BM |
172 | |
173 | /* Global Lock has extra semaphore */ | |
967440e3 BM |
174 | |
175 | (void) | |
176 | acpi_os_delete_semaphore | |
177 | (acpi_gbl_global_lock_semaphore); | |
178 | acpi_gbl_global_lock_semaphore = NULL; | |
c81da666 BM |
179 | |
180 | acpi_os_delete_mutex(object->mutex.os_mutex); | |
181 | acpi_gbl_global_lock_mutex = NULL; | |
182 | } else { | |
262a7a28 | 183 | acpi_ex_unlink_mutex(object); |
c81da666 | 184 | acpi_os_delete_mutex(object->mutex.os_mutex); |
967440e3 | 185 | } |
1da177e4 LT |
186 | break; |
187 | ||
1da177e4 LT |
188 | case ACPI_TYPE_EVENT: |
189 | ||
4be44fcd | 190 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
191 | "***** Event %p, OS Semaphore %p\n", |
192 | object, object->event.os_semaphore)); | |
1da177e4 | 193 | |
967440e3 BM |
194 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
195 | object->event.os_semaphore = NULL; | |
1da177e4 LT |
196 | break; |
197 | ||
1da177e4 LT |
198 | case ACPI_TYPE_METHOD: |
199 | ||
4be44fcd LB |
200 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
201 | "***** Method %p\n", object)); | |
1da177e4 | 202 | |
967440e3 | 203 | /* Delete the method mutex if it exists */ |
1da177e4 | 204 | |
967440e3 BM |
205 | if (object->method.mutex) { |
206 | acpi_os_delete_mutex(object->method.mutex->mutex. | |
207 | os_mutex); | |
208 | acpi_ut_delete_object_desc(object->method.mutex); | |
209 | object->method.mutex = NULL; | |
1da177e4 LT |
210 | } |
211 | break; | |
212 | ||
1da177e4 LT |
213 | case ACPI_TYPE_REGION: |
214 | ||
4be44fcd LB |
215 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
216 | "***** Region %p\n", object)); | |
1da177e4 | 217 | |
f654c0fe LM |
218 | /* |
219 | * Update address_range list. However, only permanent regions | |
220 | * are installed in this list. (Not created within a method) | |
221 | */ | |
222 | if (!(object->region.node->flags & ANOBJ_TEMPORARY)) { | |
223 | acpi_ut_remove_address_range(object->region.space_id, | |
224 | object->region.node); | |
225 | } | |
a5fe1a03 | 226 | |
4be44fcd | 227 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
228 | if (second_desc) { |
229 | /* | |
230 | * Free the region_context if and only if the handler is one of the | |
231 | * default handlers -- and therefore, we created the context object | |
232 | * locally, it was not created by an external caller. | |
233 | */ | |
234 | handler_desc = object->region.handler; | |
235 | if (handler_desc) { | |
3362a6ba LM |
236 | next_desc = |
237 | handler_desc->address_space.region_list; | |
238 | last_obj_ptr = | |
239 | &handler_desc->address_space.region_list; | |
240 | ||
241 | /* Remove the region object from the handler's list */ | |
242 | ||
243 | while (next_desc) { | |
244 | if (next_desc == object) { | |
245 | *last_obj_ptr = | |
246 | next_desc->region.next; | |
247 | break; | |
248 | } | |
249 | ||
250 | /* Walk the linked list of handler */ | |
251 | ||
252 | last_obj_ptr = &next_desc->region.next; | |
253 | next_desc = next_desc->region.next; | |
254 | } | |
255 | ||
61686124 | 256 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 257 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
258 | |
259 | /* Deactivate region and free region context */ | |
260 | ||
261 | if (handler_desc->address_space.setup) { | |
262 | (void)handler_desc-> | |
263 | address_space.setup(object, | |
264 | ACPI_REGION_DEACTIVATE, | |
265 | handler_desc-> | |
266 | address_space. | |
267 | context, | |
268 | &second_desc-> | |
269 | extra. | |
270 | region_context); | |
271 | } | |
1da177e4 LT |
272 | } |
273 | ||
4be44fcd | 274 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
275 | } |
276 | ||
277 | /* Now we can free the Extra object */ | |
278 | ||
4be44fcd | 279 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
280 | } |
281 | break; | |
282 | ||
1da177e4 LT |
283 | case ACPI_TYPE_BUFFER_FIELD: |
284 | ||
4be44fcd LB |
285 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
286 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 287 | |
4be44fcd | 288 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 289 | if (second_desc) { |
ef805d95 LM |
290 | acpi_ut_delete_object_desc(second_desc); |
291 | } | |
292 | break; | |
293 | ||
294 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
295 | ||
296 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
297 | "***** Bank Field %p\n", object)); | |
298 | ||
299 | second_desc = acpi_ns_get_secondary_object(object); | |
300 | if (second_desc) { | |
4be44fcd | 301 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
302 | } |
303 | break; | |
304 | ||
1da177e4 | 305 | default: |
1d1ea1b7 | 306 | |
1da177e4 LT |
307 | break; |
308 | } | |
309 | ||
310 | /* Free any allocated memory (pointer within the object) found above */ | |
311 | ||
312 | if (obj_pointer) { | |
4be44fcd LB |
313 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
314 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 315 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
316 | } |
317 | ||
318 | /* Now the object can be safely deleted */ | |
319 | ||
4be44fcd LB |
320 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
321 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 322 | |
4be44fcd | 323 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
324 | return_VOID; |
325 | } | |
326 | ||
1da177e4 LT |
327 | /******************************************************************************* |
328 | * | |
329 | * FUNCTION: acpi_ut_delete_internal_object_list | |
330 | * | |
44f6c012 | 331 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
332 | * |
333 | * RETURN: None | |
334 | * | |
335 | * DESCRIPTION: This function deletes an internal object list, including both | |
336 | * simple objects and package objects | |
337 | * | |
338 | ******************************************************************************/ | |
339 | ||
4be44fcd | 340 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 341 | { |
4be44fcd | 342 | union acpi_operand_object **internal_obj; |
1da177e4 | 343 | |
c8d586f8 | 344 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
345 | |
346 | /* Walk the null-terminated internal list */ | |
347 | ||
348 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 349 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
350 | } |
351 | ||
352 | /* Free the combined parameter pointer list and object array */ | |
353 | ||
8313524a | 354 | ACPI_FREE(obj_list); |
0e770b32 | 355 | return; |
1da177e4 LT |
356 | } |
357 | ||
1da177e4 LT |
358 | /******************************************************************************* |
359 | * | |
360 | * FUNCTION: acpi_ut_update_ref_count | |
361 | * | |
ba494bee | 362 | * PARAMETERS: object - Object whose ref count is to be updated |
58892c96 | 363 | * action - What to do (REF_INCREMENT or REF_DECREMENT) |
1da177e4 | 364 | * |
58892c96 | 365 | * RETURN: None. Sets new reference count within the object |
1da177e4 | 366 | * |
58892c96 | 367 | * DESCRIPTION: Modify the reference count for an internal acpi object |
1da177e4 LT |
368 | * |
369 | ******************************************************************************/ | |
370 | ||
371 | static void | |
4be44fcd | 372 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 373 | { |
58892c96 BM |
374 | u16 original_count; |
375 | u16 new_count = 0; | |
376 | acpi_cpu_flags lock_flags; | |
1da177e4 | 377 | |
b229cf92 | 378 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
379 | |
380 | if (!object) { | |
381 | return; | |
382 | } | |
383 | ||
1da177e4 | 384 | /* |
58892c96 BM |
385 | * Always get the reference count lock. Note: Interpreter and/or |
386 | * Namespace is not always locked when this function is called. | |
1da177e4 | 387 | */ |
58892c96 BM |
388 | lock_flags = acpi_os_acquire_lock(acpi_gbl_reference_count_lock); |
389 | original_count = object->common.reference_count; | |
390 | ||
391 | /* Perform the reference count action (increment, decrement) */ | |
392 | ||
1da177e4 | 393 | switch (action) { |
1da177e4 LT |
394 | case REF_INCREMENT: |
395 | ||
58892c96 | 396 | new_count = original_count + 1; |
1da177e4 | 397 | object->common.reference_count = new_count; |
58892c96 BM |
398 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
399 | ||
400 | /* The current reference count should never be zero here */ | |
401 | ||
402 | if (!original_count) { | |
403 | ACPI_WARNING((AE_INFO, | |
404 | "Obj %p, Reference Count was zero before increment\n", | |
405 | object)); | |
406 | } | |
1da177e4 | 407 | |
4be44fcd | 408 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
58892c96 BM |
409 | "Obj %p Type %.2X Refs %.2X [Incremented]\n", |
410 | object, object->common.type, new_count)); | |
1da177e4 LT |
411 | break; |
412 | ||
1da177e4 LT |
413 | case REF_DECREMENT: |
414 | ||
58892c96 | 415 | /* The current reference count must be non-zero */ |
1da177e4 | 416 | |
58892c96 BM |
417 | if (original_count) { |
418 | new_count = original_count - 1; | |
419 | object->common.reference_count = new_count; | |
1da177e4 LT |
420 | } |
421 | ||
58892c96 BM |
422 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
423 | ||
424 | if (!original_count) { | |
425 | ACPI_WARNING((AE_INFO, | |
426 | "Obj %p, Reference Count is already zero, cannot decrement\n", | |
427 | object)); | |
1da177e4 LT |
428 | } |
429 | ||
58892c96 BM |
430 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
431 | "Obj %p Type %.2X Refs %.2X [Decremented]\n", | |
432 | object, object->common.type, new_count)); | |
433 | ||
434 | /* Actually delete the object on a reference count of zero */ | |
435 | ||
1da177e4 | 436 | if (new_count == 0) { |
4be44fcd | 437 | acpi_ut_delete_internal_obj(object); |
1da177e4 | 438 | } |
1da177e4 LT |
439 | break; |
440 | ||
1da177e4 LT |
441 | default: |
442 | ||
58892c96 BM |
443 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
444 | ACPI_ERROR((AE_INFO, "Unknown Reference Count action (0x%X)", | |
445 | action)); | |
446 | return; | |
1da177e4 LT |
447 | } |
448 | ||
449 | /* | |
450 | * Sanity check the reference count, for debug purposes only. | |
451 | * (A deleted object will have a huge reference count) | |
452 | */ | |
58892c96 | 453 | if (new_count > ACPI_MAX_REFERENCE_COUNT) { |
b8e4d893 | 454 | ACPI_WARNING((AE_INFO, |
58892c96 BM |
455 | "Large Reference Count (0x%X) in object %p, Type=0x%.2X", |
456 | new_count, object, object->common.type)); | |
1da177e4 | 457 | } |
1da177e4 LT |
458 | } |
459 | ||
1da177e4 LT |
460 | /******************************************************************************* |
461 | * | |
462 | * FUNCTION: acpi_ut_update_object_reference | |
463 | * | |
ba494bee | 464 | * PARAMETERS: object - Increment ref count for this object |
1da177e4 | 465 | * and all sub-objects |
60f3deb5 | 466 | * action - Either REF_INCREMENT or REF_DECREMENT |
1da177e4 LT |
467 | * |
468 | * RETURN: Status | |
469 | * | |
470 | * DESCRIPTION: Increment the object reference count | |
471 | * | |
472 | * Object references are incremented when: | |
473 | * 1) An object is attached to a Node (namespace object) | |
474 | * 2) An object is copied (all subobjects must be incremented) | |
475 | * | |
476 | * Object references are decremented when: | |
477 | * 1) An object is detached from an Node | |
478 | * | |
479 | ******************************************************************************/ | |
480 | ||
481 | acpi_status | |
4119532c | 482 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
1da177e4 | 483 | { |
4be44fcd LB |
484 | acpi_status status = AE_OK; |
485 | union acpi_generic_state *state_list = NULL; | |
486 | union acpi_operand_object *next_object = NULL; | |
86ed4bc8 | 487 | union acpi_operand_object *prev_object; |
4be44fcd | 488 | union acpi_generic_state *state; |
67a119f9 | 489 | u32 i; |
1da177e4 | 490 | |
0e770b32 | 491 | ACPI_FUNCTION_NAME(ut_update_object_reference); |
1da177e4 | 492 | |
f9f4601f | 493 | while (object) { |
52fc0b02 | 494 | |
f9f4601f | 495 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 496 | |
4be44fcd LB |
497 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
498 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
499 | "Object %p is NS handle\n", object)); | |
0e770b32 | 500 | return (AE_OK); |
f9f4601f | 501 | } |
1da177e4 LT |
502 | |
503 | /* | |
504 | * All sub-objects must have their reference count incremented also. | |
505 | * Different object types have different subobjects. | |
506 | */ | |
3371c19c | 507 | switch (object->common.type) { |
1da177e4 | 508 | case ACPI_TYPE_DEVICE: |
f6dd9221 BM |
509 | case ACPI_TYPE_PROCESSOR: |
510 | case ACPI_TYPE_POWER: | |
511 | case ACPI_TYPE_THERMAL: | |
86ed4bc8 BM |
512 | /* |
513 | * Update the notify objects for these types (if present) | |
514 | * Two lists, system and device notify handlers. | |
515 | */ | |
516 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { | |
517 | prev_object = | |
518 | object->common_notify.notify_list[i]; | |
519 | while (prev_object) { | |
520 | next_object = | |
521 | prev_object->notify.next[i]; | |
522 | acpi_ut_update_ref_count(prev_object, | |
523 | action); | |
524 | prev_object = next_object; | |
525 | } | |
526 | } | |
1da177e4 LT |
527 | break; |
528 | ||
1da177e4 | 529 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 530 | /* |
f9f4601f RM |
531 | * We must update all the sub-objects of the package, |
532 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
533 | */ |
534 | for (i = 0; i < object->package.count; i++) { | |
535 | /* | |
53938551 CG |
536 | * Null package elements are legal and can be simply |
537 | * ignored. | |
1da177e4 | 538 | */ |
53938551 CG |
539 | next_object = object->package.elements[i]; |
540 | if (!next_object) { | |
541 | continue; | |
542 | } | |
543 | ||
544 | switch (next_object->common.type) { | |
545 | case ACPI_TYPE_INTEGER: | |
546 | case ACPI_TYPE_STRING: | |
547 | case ACPI_TYPE_BUFFER: | |
548 | /* | |
549 | * For these very simple sub-objects, we can just | |
550 | * update the reference count here and continue. | |
551 | * Greatly increases performance of this operation. | |
552 | */ | |
553 | acpi_ut_update_ref_count(next_object, | |
554 | action); | |
555 | break; | |
556 | ||
557 | default: | |
558 | /* | |
559 | * For complex sub-objects, push them onto the stack | |
560 | * for later processing (this eliminates recursion.) | |
561 | */ | |
562 | status = | |
563 | acpi_ut_create_update_state_and_push | |
564 | (next_object, action, &state_list); | |
565 | if (ACPI_FAILURE(status)) { | |
566 | goto error_exit; | |
567 | } | |
568 | break; | |
1da177e4 | 569 | } |
1da177e4 | 570 | } |
53938551 | 571 | next_object = NULL; |
1da177e4 LT |
572 | break; |
573 | ||
1da177e4 LT |
574 | case ACPI_TYPE_BUFFER_FIELD: |
575 | ||
f9f4601f | 576 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
577 | break; |
578 | ||
1da177e4 LT |
579 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
580 | ||
f9f4601f RM |
581 | next_object = object->field.region_obj; |
582 | break; | |
1da177e4 LT |
583 | |
584 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
585 | ||
f9f4601f | 586 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
587 | status = |
588 | acpi_ut_create_update_state_and_push(object-> | |
589 | bank_field. | |
590 | region_obj, | |
591 | action, | |
592 | &state_list); | |
593 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
594 | goto error_exit; |
595 | } | |
1da177e4 LT |
596 | break; |
597 | ||
1da177e4 LT |
598 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
599 | ||
f9f4601f | 600 | next_object = object->index_field.index_obj; |
4be44fcd LB |
601 | status = |
602 | acpi_ut_create_update_state_and_push(object-> | |
603 | index_field. | |
604 | data_obj, | |
605 | action, | |
606 | &state_list); | |
607 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
608 | goto error_exit; |
609 | } | |
1da177e4 LT |
610 | break; |
611 | ||
1da177e4 | 612 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 | 613 | /* |
9e41d93c BM |
614 | * The target of an Index (a package, string, or buffer) or a named |
615 | * reference must track changes to the ref count of the index or | |
616 | * target object. | |
1da177e4 | 617 | */ |
1044f1f6 BM |
618 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
619 | (object->reference.class == ACPI_REFCLASS_NAME)) { | |
f9f4601f | 620 | next_object = object->reference.object; |
1da177e4 LT |
621 | } |
622 | break; | |
623 | ||
1da177e4 LT |
624 | case ACPI_TYPE_REGION: |
625 | default: | |
1d1ea1b7 | 626 | |
4119532c | 627 | break; /* No subobjects for all other types */ |
1da177e4 LT |
628 | } |
629 | ||
630 | /* | |
4119532c | 631 | * Now we can update the count in the main object. This can only |
1da177e4 LT |
632 | * happen after we update the sub-objects in case this causes the |
633 | * main object to be deleted. | |
634 | */ | |
4be44fcd | 635 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 636 | object = NULL; |
1da177e4 LT |
637 | |
638 | /* Move on to the next object to be updated */ | |
639 | ||
f9f4601f RM |
640 | if (next_object) { |
641 | object = next_object; | |
642 | next_object = NULL; | |
4be44fcd LB |
643 | } else if (state_list) { |
644 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 645 | object = state->update.object; |
4be44fcd | 646 | acpi_ut_delete_generic_state(state); |
f9f4601f | 647 | } |
1da177e4 LT |
648 | } |
649 | ||
0e770b32 | 650 | return (AE_OK); |
1da177e4 | 651 | |
4be44fcd | 652 | error_exit: |
1da177e4 | 653 | |
b8e4d893 BM |
654 | ACPI_EXCEPTION((AE_INFO, status, |
655 | "Could not update object reference count")); | |
1da177e4 | 656 | |
cf058bd1 LM |
657 | /* Free any stacked Update State objects */ |
658 | ||
659 | while (state_list) { | |
660 | state = acpi_ut_pop_generic_state(&state_list); | |
661 | acpi_ut_delete_generic_state(state); | |
662 | } | |
663 | ||
0e770b32 | 664 | return (status); |
1da177e4 LT |
665 | } |
666 | ||
1da177e4 LT |
667 | /******************************************************************************* |
668 | * | |
669 | * FUNCTION: acpi_ut_add_reference | |
670 | * | |
ba494bee | 671 | * PARAMETERS: object - Object whose reference count is to be |
44f6c012 | 672 | * incremented |
1da177e4 LT |
673 | * |
674 | * RETURN: None | |
675 | * | |
676 | * DESCRIPTION: Add one reference to an ACPI object | |
677 | * | |
678 | ******************************************************************************/ | |
679 | ||
4be44fcd | 680 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
681 | { |
682 | ||
0e770b32 | 683 | ACPI_FUNCTION_NAME(ut_add_reference); |
1da177e4 LT |
684 | |
685 | /* Ensure that we have a valid object */ | |
686 | ||
4be44fcd | 687 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 688 | return; |
1da177e4 LT |
689 | } |
690 | ||
4be44fcd LB |
691 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
692 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
693 | object, object->common.reference_count)); | |
1da177e4 LT |
694 | |
695 | /* Increment the reference count */ | |
696 | ||
4be44fcd | 697 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
0e770b32 | 698 | return; |
1da177e4 LT |
699 | } |
700 | ||
1da177e4 LT |
701 | /******************************************************************************* |
702 | * | |
703 | * FUNCTION: acpi_ut_remove_reference | |
704 | * | |
ba494bee | 705 | * PARAMETERS: object - Object whose ref count will be decremented |
1da177e4 LT |
706 | * |
707 | * RETURN: None | |
708 | * | |
709 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
710 | * | |
711 | ******************************************************************************/ | |
712 | ||
4be44fcd | 713 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
714 | { |
715 | ||
0e770b32 | 716 | ACPI_FUNCTION_NAME(ut_remove_reference); |
1da177e4 LT |
717 | |
718 | /* | |
4119532c BM |
719 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
720 | * each caller from having to check. Also, ignore NS nodes. | |
1da177e4 LT |
721 | */ |
722 | if (!object || | |
4be44fcd | 723 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
0e770b32 | 724 | return; |
1da177e4 LT |
725 | } |
726 | ||
727 | /* Ensure that we have a valid object */ | |
728 | ||
4be44fcd | 729 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 730 | return; |
1da177e4 LT |
731 | } |
732 | ||
4be44fcd LB |
733 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
734 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
735 | object, object->common.reference_count)); | |
1da177e4 LT |
736 | |
737 | /* | |
738 | * Decrement the reference count, and only actually delete the object | |
4119532c | 739 | * if the reference count becomes 0. (Must also decrement the ref count |
1da177e4 LT |
740 | * of all subobjects!) |
741 | */ | |
4be44fcd | 742 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
0e770b32 | 743 | return; |
1da177e4 | 744 | } |