| 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: utdelete - object deletion and reference count utilities |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, 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. |
| 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 | |
| 44 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acinterp.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "acevents.h" |
| 49 | |
| 50 | |
| 51 | #define _COMPONENT ACPI_UTILITIES |
| 52 | ACPI_MODULE_NAME ("utdelete" ) |
| 53 | |
| 54 | /* Local prototypes */ |
| 55 | |
| 56 | static void |
| 57 | AcpiUtDeleteInternalObj ( |
| 58 | ACPI_OPERAND_OBJECT *Object); |
| 59 | |
| 60 | static void |
| 61 | AcpiUtUpdateRefCount ( |
| 62 | ACPI_OPERAND_OBJECT *Object, |
| 63 | UINT32 Action); |
| 64 | |
| 65 | |
| 66 | /******************************************************************************* |
| 67 | * |
| 68 | * FUNCTION: AcpiUtDeleteInternalObj |
| 69 | * |
| 70 | * PARAMETERS: Object - Object to be deleted |
| 71 | * |
| 72 | * RETURN: None |
| 73 | * |
| 74 | * DESCRIPTION: Low level object deletion, after reference counts have been |
| 75 | * updated (All reference counts, including sub-objects!) |
| 76 | * |
| 77 | ******************************************************************************/ |
| 78 | |
| 79 | static void |
| 80 | AcpiUtDeleteInternalObj ( |
| 81 | ACPI_OPERAND_OBJECT *Object) |
| 82 | { |
| 83 | void *ObjPointer = NULL; |
| 84 | ACPI_OPERAND_OBJECT *HandlerDesc; |
| 85 | ACPI_OPERAND_OBJECT *SecondDesc; |
| 86 | ACPI_OPERAND_OBJECT *NextDesc; |
| 87 | ACPI_OPERAND_OBJECT *StartDesc; |
| 88 | ACPI_OPERAND_OBJECT **LastObjPtr; |
| 89 | |
| 90 | |
| 91 | ACPI_FUNCTION_TRACE_PTR (UtDeleteInternalObj, Object); |
| 92 | |
| 93 | |
| 94 | if (!Object) |
| 95 | { |
| 96 | return_VOID; |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Must delete or free any pointers within the object that are not |
| 101 | * actual ACPI objects (for example, a raw buffer pointer). |
| 102 | */ |
| 103 | switch (Object->Common.Type) |
| 104 | { |
| 105 | case ACPI_TYPE_STRING: |
| 106 | |
| 107 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n" , |
| 108 | Object, Object->String.Pointer)); |
| 109 | |
| 110 | /* Free the actual string buffer */ |
| 111 | |
| 112 | if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) |
| 113 | { |
| 114 | /* But only if it is NOT a pointer into an ACPI table */ |
| 115 | |
| 116 | ObjPointer = Object->String.Pointer; |
| 117 | } |
| 118 | break; |
| 119 | |
| 120 | case ACPI_TYPE_BUFFER: |
| 121 | |
| 122 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n" , |
| 123 | Object, Object->Buffer.Pointer)); |
| 124 | |
| 125 | /* Free the actual buffer */ |
| 126 | |
| 127 | if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) |
| 128 | { |
| 129 | /* But only if it is NOT a pointer into an ACPI table */ |
| 130 | |
| 131 | ObjPointer = Object->Buffer.Pointer; |
| 132 | } |
| 133 | break; |
| 134 | |
| 135 | case ACPI_TYPE_PACKAGE: |
| 136 | |
| 137 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n" , |
| 138 | Object->Package.Count)); |
| 139 | |
| 140 | /* |
| 141 | * Elements of the package are not handled here, they are deleted |
| 142 | * separately |
| 143 | */ |
| 144 | |
| 145 | /* Free the (variable length) element pointer array */ |
| 146 | |
| 147 | ObjPointer = Object->Package.Elements; |
| 148 | break; |
| 149 | |
| 150 | /* |
| 151 | * These objects have a possible list of notify handlers. |
| 152 | * Device object also may have a GPE block. |
| 153 | */ |
| 154 | case ACPI_TYPE_DEVICE: |
| 155 | |
| 156 | if (Object->Device.GpeBlock) |
| 157 | { |
| 158 | (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock); |
| 159 | } |
| 160 | |
| 161 | /*lint -fallthrough */ |
| 162 | |
| 163 | case ACPI_TYPE_PROCESSOR: |
| 164 | case ACPI_TYPE_THERMAL: |
| 165 | |
| 166 | /* Walk the address handler list for this object */ |
| 167 | |
| 168 | HandlerDesc = Object->CommonNotify.Handler; |
| 169 | while (HandlerDesc) |
| 170 | { |
| 171 | NextDesc = HandlerDesc->AddressSpace.Next; |
| 172 | AcpiUtRemoveReference (HandlerDesc); |
| 173 | HandlerDesc = NextDesc; |
| 174 | } |
| 175 | break; |
| 176 | |
| 177 | case ACPI_TYPE_MUTEX: |
| 178 | |
| 179 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 180 | "***** Mutex %p, OS Mutex %p\n" , |
| 181 | Object, Object->Mutex.OsMutex)); |
| 182 | |
| 183 | if (Object == AcpiGbl_GlobalLockMutex) |
| 184 | { |
| 185 | /* Global Lock has extra semaphore */ |
| 186 | |
| 187 | (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore); |
| 188 | AcpiGbl_GlobalLockSemaphore = NULL; |
| 189 | |
| 190 | AcpiOsDeleteMutex (Object->Mutex.OsMutex); |
| 191 | AcpiGbl_GlobalLockMutex = NULL; |
| 192 | } |
| 193 | else |
| 194 | { |
| 195 | AcpiExUnlinkMutex (Object); |
| 196 | AcpiOsDeleteMutex (Object->Mutex.OsMutex); |
| 197 | } |
| 198 | break; |
| 199 | |
| 200 | case ACPI_TYPE_EVENT: |
| 201 | |
| 202 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 203 | "***** Event %p, OS Semaphore %p\n" , |
| 204 | Object, Object->Event.OsSemaphore)); |
| 205 | |
| 206 | (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore); |
| 207 | Object->Event.OsSemaphore = NULL; |
| 208 | break; |
| 209 | |
| 210 | case ACPI_TYPE_METHOD: |
| 211 | |
| 212 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 213 | "***** Method %p\n" , Object)); |
| 214 | |
| 215 | /* Delete the method mutex if it exists */ |
| 216 | |
| 217 | if (Object->Method.Mutex) |
| 218 | { |
| 219 | AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex); |
| 220 | AcpiUtDeleteObjectDesc (Object->Method.Mutex); |
| 221 | Object->Method.Mutex = NULL; |
| 222 | } |
| 223 | |
| 224 | if (Object->Method.Node) |
| 225 | { |
| 226 | Object->Method.Node = NULL; |
| 227 | } |
| 228 | break; |
| 229 | |
| 230 | case ACPI_TYPE_REGION: |
| 231 | |
| 232 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 233 | "***** Region %p\n" , Object)); |
| 234 | |
| 235 | /* |
| 236 | * Update AddressRange list. However, only permanent regions |
| 237 | * are installed in this list. (Not created within a method) |
| 238 | */ |
| 239 | if (!(Object->Region.Node->Flags & ANOBJ_TEMPORARY)) |
| 240 | { |
| 241 | AcpiUtRemoveAddressRange (Object->Region.SpaceId, |
| 242 | Object->Region.Node); |
| 243 | } |
| 244 | |
| 245 | SecondDesc = AcpiNsGetSecondaryObject (Object); |
| 246 | if (SecondDesc) |
| 247 | { |
| 248 | /* |
| 249 | * Free the RegionContext if and only if the handler is one of the |
| 250 | * default handlers -- and therefore, we created the context object |
| 251 | * locally, it was not created by an external caller. |
| 252 | */ |
| 253 | HandlerDesc = Object->Region.Handler; |
| 254 | if (HandlerDesc) |
| 255 | { |
| 256 | NextDesc = HandlerDesc->AddressSpace.RegionList; |
| 257 | StartDesc = NextDesc; |
| 258 | LastObjPtr = &HandlerDesc->AddressSpace.RegionList; |
| 259 | |
| 260 | /* Remove the region object from the handler list */ |
| 261 | |
| 262 | while (NextDesc) |
| 263 | { |
| 264 | if (NextDesc == Object) |
| 265 | { |
| 266 | *LastObjPtr = NextDesc->Region.Next; |
| 267 | break; |
| 268 | } |
| 269 | |
| 270 | /* Walk the linked list of handlers */ |
| 271 | |
| 272 | LastObjPtr = &NextDesc->Region.Next; |
| 273 | NextDesc = NextDesc->Region.Next; |
| 274 | |
| 275 | /* Prevent infinite loop if list is corrupted */ |
| 276 | |
| 277 | if (NextDesc == StartDesc) |
| 278 | { |
| 279 | ACPI_ERROR ((AE_INFO, |
| 280 | "Circular region list in address handler object %p" , |
| 281 | HandlerDesc)); |
| 282 | return_VOID; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | if (HandlerDesc->AddressSpace.HandlerFlags & |
| 287 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) |
| 288 | { |
| 289 | /* Deactivate region and free region context */ |
| 290 | |
| 291 | if (HandlerDesc->AddressSpace.Setup) |
| 292 | { |
| 293 | (void) HandlerDesc->AddressSpace.Setup (Object, |
| 294 | ACPI_REGION_DEACTIVATE, |
| 295 | HandlerDesc->AddressSpace.Context, |
| 296 | &SecondDesc->Extra.RegionContext); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | AcpiUtRemoveReference (HandlerDesc); |
| 301 | } |
| 302 | |
| 303 | /* Now we can free the Extra object */ |
| 304 | |
| 305 | AcpiUtDeleteObjectDesc (SecondDesc); |
| 306 | } |
| 307 | break; |
| 308 | |
| 309 | case ACPI_TYPE_BUFFER_FIELD: |
| 310 | |
| 311 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 312 | "***** Buffer Field %p\n" , Object)); |
| 313 | |
| 314 | SecondDesc = AcpiNsGetSecondaryObject (Object); |
| 315 | if (SecondDesc) |
| 316 | { |
| 317 | AcpiUtDeleteObjectDesc (SecondDesc); |
| 318 | } |
| 319 | break; |
| 320 | |
| 321 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 322 | |
| 323 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 324 | "***** Bank Field %p\n" , Object)); |
| 325 | |
| 326 | SecondDesc = AcpiNsGetSecondaryObject (Object); |
| 327 | if (SecondDesc) |
| 328 | { |
| 329 | AcpiUtDeleteObjectDesc (SecondDesc); |
| 330 | } |
| 331 | break; |
| 332 | |
| 333 | default: |
| 334 | |
| 335 | break; |
| 336 | } |
| 337 | |
| 338 | /* Free any allocated memory (pointer within the object) found above */ |
| 339 | |
| 340 | if (ObjPointer) |
| 341 | { |
| 342 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n" , |
| 343 | ObjPointer)); |
| 344 | ACPI_FREE (ObjPointer); |
| 345 | } |
| 346 | |
| 347 | /* Now the object can be safely deleted */ |
| 348 | |
| 349 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n" , |
| 350 | Object, AcpiUtGetObjectTypeName (Object))); |
| 351 | |
| 352 | AcpiUtDeleteObjectDesc (Object); |
| 353 | return_VOID; |
| 354 | } |
| 355 | |
| 356 | |
| 357 | /******************************************************************************* |
| 358 | * |
| 359 | * FUNCTION: AcpiUtDeleteInternalObjectList |
| 360 | * |
| 361 | * PARAMETERS: ObjList - Pointer to the list to be deleted |
| 362 | * |
| 363 | * RETURN: None |
| 364 | * |
| 365 | * DESCRIPTION: This function deletes an internal object list, including both |
| 366 | * simple objects and package objects |
| 367 | * |
| 368 | ******************************************************************************/ |
| 369 | |
| 370 | void |
| 371 | AcpiUtDeleteInternalObjectList ( |
| 372 | ACPI_OPERAND_OBJECT **ObjList) |
| 373 | { |
| 374 | ACPI_OPERAND_OBJECT **InternalObj; |
| 375 | |
| 376 | |
| 377 | ACPI_FUNCTION_ENTRY (); |
| 378 | |
| 379 | |
| 380 | /* Walk the null-terminated internal list */ |
| 381 | |
| 382 | for (InternalObj = ObjList; *InternalObj; InternalObj++) |
| 383 | { |
| 384 | AcpiUtRemoveReference (*InternalObj); |
| 385 | } |
| 386 | |
| 387 | /* Free the combined parameter pointer list and object array */ |
| 388 | |
| 389 | ACPI_FREE (ObjList); |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | |
| 394 | /******************************************************************************* |
| 395 | * |
| 396 | * FUNCTION: AcpiUtUpdateRefCount |
| 397 | * |
| 398 | * PARAMETERS: Object - Object whose ref count is to be updated |
| 399 | * Action - What to do (REF_INCREMENT or REF_DECREMENT) |
| 400 | * |
| 401 | * RETURN: None. Sets new reference count within the object |
| 402 | * |
| 403 | * DESCRIPTION: Modify the reference count for an internal acpi object |
| 404 | * |
| 405 | ******************************************************************************/ |
| 406 | |
| 407 | static void |
| 408 | AcpiUtUpdateRefCount ( |
| 409 | ACPI_OPERAND_OBJECT *Object, |
| 410 | UINT32 Action) |
| 411 | { |
| 412 | UINT16 OriginalCount; |
| 413 | UINT16 NewCount = 0; |
| 414 | ACPI_CPU_FLAGS LockFlags; |
| 415 | |
| 416 | |
| 417 | ACPI_FUNCTION_NAME (UtUpdateRefCount); |
| 418 | |
| 419 | |
| 420 | if (!Object) |
| 421 | { |
| 422 | return; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * Always get the reference count lock. Note: Interpreter and/or |
| 427 | * Namespace is not always locked when this function is called. |
| 428 | */ |
| 429 | LockFlags = AcpiOsAcquireLock (AcpiGbl_ReferenceCountLock); |
| 430 | OriginalCount = Object->Common.ReferenceCount; |
| 431 | |
| 432 | /* Perform the reference count action (increment, decrement) */ |
| 433 | |
| 434 | switch (Action) |
| 435 | { |
| 436 | case REF_INCREMENT: |
| 437 | |
| 438 | NewCount = OriginalCount + 1; |
| 439 | Object->Common.ReferenceCount = NewCount; |
| 440 | AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); |
| 441 | |
| 442 | /* The current reference count should never be zero here */ |
| 443 | |
| 444 | if (!OriginalCount) |
| 445 | { |
| 446 | ACPI_WARNING ((AE_INFO, |
| 447 | "Obj %p, Reference Count was zero before increment\n" , |
| 448 | Object)); |
| 449 | } |
| 450 | |
| 451 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 452 | "Obj %p Type %.2X Refs %.2X [Incremented]\n" , |
| 453 | Object, Object->Common.Type, NewCount)); |
| 454 | break; |
| 455 | |
| 456 | case REF_DECREMENT: |
| 457 | |
| 458 | /* The current reference count must be non-zero */ |
| 459 | |
| 460 | if (OriginalCount) |
| 461 | { |
| 462 | NewCount = OriginalCount - 1; |
| 463 | Object->Common.ReferenceCount = NewCount; |
| 464 | } |
| 465 | |
| 466 | AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); |
| 467 | |
| 468 | if (!OriginalCount) |
| 469 | { |
| 470 | ACPI_WARNING ((AE_INFO, |
| 471 | "Obj %p, Reference Count is already zero, cannot decrement\n" , |
| 472 | Object)); |
| 473 | } |
| 474 | |
| 475 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 476 | "Obj %p Type %.2X Refs %.2X [Decremented]\n" , |
| 477 | Object, Object->Common.Type, NewCount)); |
| 478 | |
| 479 | /* Actually delete the object on a reference count of zero */ |
| 480 | |
| 481 | if (NewCount == 0) |
| 482 | { |
| 483 | AcpiUtDeleteInternalObj (Object); |
| 484 | } |
| 485 | break; |
| 486 | |
| 487 | default: |
| 488 | |
| 489 | AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); |
| 490 | ACPI_ERROR ((AE_INFO, "Unknown Reference Count action (0x%X)" , |
| 491 | Action)); |
| 492 | return; |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * Sanity check the reference count, for debug purposes only. |
| 497 | * (A deleted object will have a huge reference count) |
| 498 | */ |
| 499 | if (NewCount > ACPI_MAX_REFERENCE_COUNT) |
| 500 | { |
| 501 | ACPI_WARNING ((AE_INFO, |
| 502 | "Large Reference Count (0x%X) in object %p, Type=0x%.2X" , |
| 503 | NewCount, Object, Object->Common.Type)); |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | |
| 508 | /******************************************************************************* |
| 509 | * |
| 510 | * FUNCTION: AcpiUtUpdateObjectReference |
| 511 | * |
| 512 | * PARAMETERS: Object - Increment ref count for this object |
| 513 | * and all sub-objects |
| 514 | * Action - Either REF_INCREMENT or REF_DECREMENT |
| 515 | * |
| 516 | * RETURN: Status |
| 517 | * |
| 518 | * DESCRIPTION: Increment the object reference count |
| 519 | * |
| 520 | * Object references are incremented when: |
| 521 | * 1) An object is attached to a Node (namespace object) |
| 522 | * 2) An object is copied (all subobjects must be incremented) |
| 523 | * |
| 524 | * Object references are decremented when: |
| 525 | * 1) An object is detached from an Node |
| 526 | * |
| 527 | ******************************************************************************/ |
| 528 | |
| 529 | ACPI_STATUS |
| 530 | AcpiUtUpdateObjectReference ( |
| 531 | ACPI_OPERAND_OBJECT *Object, |
| 532 | UINT16 Action) |
| 533 | { |
| 534 | ACPI_STATUS Status = AE_OK; |
| 535 | ACPI_GENERIC_STATE *StateList = NULL; |
| 536 | ACPI_OPERAND_OBJECT *NextObject = NULL; |
| 537 | ACPI_OPERAND_OBJECT *PrevObject; |
| 538 | ACPI_GENERIC_STATE *State; |
| 539 | UINT32 i; |
| 540 | |
| 541 | |
| 542 | ACPI_FUNCTION_NAME (UtUpdateObjectReference); |
| 543 | |
| 544 | |
| 545 | while (Object) |
| 546 | { |
| 547 | /* Make sure that this isn't a namespace handle */ |
| 548 | |
| 549 | if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED) |
| 550 | { |
| 551 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 552 | "Object %p is NS handle\n" , Object)); |
| 553 | return (AE_OK); |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * All sub-objects must have their reference count incremented |
| 558 | * also. Different object types have different subobjects. |
| 559 | */ |
| 560 | switch (Object->Common.Type) |
| 561 | { |
| 562 | case ACPI_TYPE_DEVICE: |
| 563 | case ACPI_TYPE_PROCESSOR: |
| 564 | case ACPI_TYPE_POWER: |
| 565 | case ACPI_TYPE_THERMAL: |
| 566 | /* |
| 567 | * Update the notify objects for these types (if present) |
| 568 | * Two lists, system and device notify handlers. |
| 569 | */ |
| 570 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) |
| 571 | { |
| 572 | PrevObject = Object->CommonNotify.NotifyList[i]; |
| 573 | while (PrevObject) |
| 574 | { |
| 575 | NextObject = PrevObject->Notify.Next[i]; |
| 576 | AcpiUtUpdateRefCount (PrevObject, Action); |
| 577 | PrevObject = NextObject; |
| 578 | } |
| 579 | } |
| 580 | break; |
| 581 | |
| 582 | case ACPI_TYPE_PACKAGE: |
| 583 | /* |
| 584 | * We must update all the sub-objects of the package, |
| 585 | * each of whom may have their own sub-objects. |
| 586 | */ |
| 587 | for (i = 0; i < Object->Package.Count; i++) |
| 588 | { |
| 589 | /* |
| 590 | * Null package elements are legal and can be simply |
| 591 | * ignored. |
| 592 | */ |
| 593 | NextObject = Object->Package.Elements[i]; |
| 594 | if (!NextObject) |
| 595 | { |
| 596 | continue; |
| 597 | } |
| 598 | |
| 599 | switch (NextObject->Common.Type) |
| 600 | { |
| 601 | case ACPI_TYPE_INTEGER: |
| 602 | case ACPI_TYPE_STRING: |
| 603 | case ACPI_TYPE_BUFFER: |
| 604 | /* |
| 605 | * For these very simple sub-objects, we can just |
| 606 | * update the reference count here and continue. |
| 607 | * Greatly increases performance of this operation. |
| 608 | */ |
| 609 | AcpiUtUpdateRefCount (NextObject, Action); |
| 610 | break; |
| 611 | |
| 612 | default: |
| 613 | /* |
| 614 | * For complex sub-objects, push them onto the stack |
| 615 | * for later processing (this eliminates recursion.) |
| 616 | */ |
| 617 | Status = AcpiUtCreateUpdateStateAndPush ( |
| 618 | NextObject, Action, &StateList); |
| 619 | if (ACPI_FAILURE (Status)) |
| 620 | { |
| 621 | goto ErrorExit; |
| 622 | } |
| 623 | break; |
| 624 | } |
| 625 | } |
| 626 | NextObject = NULL; |
| 627 | break; |
| 628 | |
| 629 | case ACPI_TYPE_BUFFER_FIELD: |
| 630 | |
| 631 | NextObject = Object->BufferField.BufferObj; |
| 632 | break; |
| 633 | |
| 634 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 635 | |
| 636 | NextObject = Object->Field.RegionObj; |
| 637 | break; |
| 638 | |
| 639 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 640 | |
| 641 | NextObject = Object->BankField.BankObj; |
| 642 | Status = AcpiUtCreateUpdateStateAndPush ( |
| 643 | Object->BankField.RegionObj, Action, &StateList); |
| 644 | if (ACPI_FAILURE (Status)) |
| 645 | { |
| 646 | goto ErrorExit; |
| 647 | } |
| 648 | break; |
| 649 | |
| 650 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 651 | |
| 652 | NextObject = Object->IndexField.IndexObj; |
| 653 | Status = AcpiUtCreateUpdateStateAndPush ( |
| 654 | Object->IndexField.DataObj, Action, &StateList); |
| 655 | if (ACPI_FAILURE (Status)) |
| 656 | { |
| 657 | goto ErrorExit; |
| 658 | } |
| 659 | break; |
| 660 | |
| 661 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 662 | /* |
| 663 | * The target of an Index (a package, string, or buffer) or a named |
| 664 | * reference must track changes to the ref count of the index or |
| 665 | * target object. |
| 666 | */ |
| 667 | if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) || |
| 668 | (Object->Reference.Class== ACPI_REFCLASS_NAME)) |
| 669 | { |
| 670 | NextObject = Object->Reference.Object; |
| 671 | } |
| 672 | break; |
| 673 | |
| 674 | case ACPI_TYPE_REGION: |
| 675 | default: |
| 676 | |
| 677 | break; /* No subobjects for all other types */ |
| 678 | } |
| 679 | |
| 680 | /* |
| 681 | * Now we can update the count in the main object. This can only |
| 682 | * happen after we update the sub-objects in case this causes the |
| 683 | * main object to be deleted. |
| 684 | */ |
| 685 | AcpiUtUpdateRefCount (Object, Action); |
| 686 | Object = NULL; |
| 687 | |
| 688 | /* Move on to the next object to be updated */ |
| 689 | |
| 690 | if (NextObject) |
| 691 | { |
| 692 | Object = NextObject; |
| 693 | NextObject = NULL; |
| 694 | } |
| 695 | else if (StateList) |
| 696 | { |
| 697 | State = AcpiUtPopGenericState (&StateList); |
| 698 | Object = State->Update.Object; |
| 699 | AcpiUtDeleteGenericState (State); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | return (AE_OK); |
| 704 | |
| 705 | |
| 706 | ErrorExit: |
| 707 | |
| 708 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 709 | "Could not update object reference count" )); |
| 710 | |
| 711 | /* Free any stacked Update State objects */ |
| 712 | |
| 713 | while (StateList) |
| 714 | { |
| 715 | State = AcpiUtPopGenericState (&StateList); |
| 716 | AcpiUtDeleteGenericState (State); |
| 717 | } |
| 718 | |
| 719 | return (Status); |
| 720 | } |
| 721 | |
| 722 | |
| 723 | /******************************************************************************* |
| 724 | * |
| 725 | * FUNCTION: AcpiUtAddReference |
| 726 | * |
| 727 | * PARAMETERS: Object - Object whose reference count is to be |
| 728 | * incremented |
| 729 | * |
| 730 | * RETURN: None |
| 731 | * |
| 732 | * DESCRIPTION: Add one reference to an ACPI object |
| 733 | * |
| 734 | ******************************************************************************/ |
| 735 | |
| 736 | void |
| 737 | AcpiUtAddReference ( |
| 738 | ACPI_OPERAND_OBJECT *Object) |
| 739 | { |
| 740 | |
| 741 | ACPI_FUNCTION_NAME (UtAddReference); |
| 742 | |
| 743 | |
| 744 | /* Ensure that we have a valid object */ |
| 745 | |
| 746 | if (!AcpiUtValidInternalObject (Object)) |
| 747 | { |
| 748 | return; |
| 749 | } |
| 750 | |
| 751 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 752 | "Obj %p Current Refs=%X [To Be Incremented]\n" , |
| 753 | Object, Object->Common.ReferenceCount)); |
| 754 | |
| 755 | /* Increment the reference count */ |
| 756 | |
| 757 | (void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT); |
| 758 | return; |
| 759 | } |
| 760 | |
| 761 | |
| 762 | /******************************************************************************* |
| 763 | * |
| 764 | * FUNCTION: AcpiUtRemoveReference |
| 765 | * |
| 766 | * PARAMETERS: Object - Object whose ref count will be decremented |
| 767 | * |
| 768 | * RETURN: None |
| 769 | * |
| 770 | * DESCRIPTION: Decrement the reference count of an ACPI internal object |
| 771 | * |
| 772 | ******************************************************************************/ |
| 773 | |
| 774 | void |
| 775 | AcpiUtRemoveReference ( |
| 776 | ACPI_OPERAND_OBJECT *Object) |
| 777 | { |
| 778 | |
| 779 | ACPI_FUNCTION_NAME (UtRemoveReference); |
| 780 | |
| 781 | |
| 782 | /* |
| 783 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
| 784 | * each caller from having to check. Also, ignore NS nodes. |
| 785 | */ |
| 786 | if (!Object || |
| 787 | (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)) |
| 788 | |
| 789 | { |
| 790 | return; |
| 791 | } |
| 792 | |
| 793 | /* Ensure that we have a valid object */ |
| 794 | |
| 795 | if (!AcpiUtValidInternalObject (Object)) |
| 796 | { |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, |
| 801 | "Obj %p Current Refs=%X [To Be Decremented]\n" , |
| 802 | Object, Object->Common.ReferenceCount)); |
| 803 | |
| 804 | /* |
| 805 | * Decrement the reference count, and only actually delete the object |
| 806 | * if the reference count becomes 0. (Must also decrement the ref count |
| 807 | * of all subobjects!) |
| 808 | */ |
| 809 | (void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT); |
| 810 | return; |
| 811 | } |
| 812 | |