1 /******************************************************************************* 2 * 3 * Module Name: utdelete - object deletion and reference count utilities 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/acinterp.h> 155 #include <contrib/dev/acpica/include/acnamesp.h> 156 #include <contrib/dev/acpica/include/acevents.h> 157 158 159 #define _COMPONENT ACPI_UTILITIES 160 ACPI_MODULE_NAME ("utdelete") 161 162 /* Local prototypes */ 163 164 static void 165 AcpiUtDeleteInternalObj ( 166 ACPI_OPERAND_OBJECT *Object); 167 168 static void 169 AcpiUtUpdateRefCount ( 170 ACPI_OPERAND_OBJECT *Object, 171 UINT32 Action); 172 173 174 /******************************************************************************* 175 * 176 * FUNCTION: AcpiUtDeleteInternalObj 177 * 178 * PARAMETERS: Object - Object to be deleted 179 * 180 * RETURN: None 181 * 182 * DESCRIPTION: Low level object deletion, after reference counts have been 183 * updated (All reference counts, including sub-objects!) 184 * 185 ******************************************************************************/ 186 187 static void 188 AcpiUtDeleteInternalObj ( 189 ACPI_OPERAND_OBJECT *Object) 190 { 191 void *ObjPointer = NULL; 192 ACPI_OPERAND_OBJECT *HandlerDesc; 193 ACPI_OPERAND_OBJECT *SecondDesc; 194 ACPI_OPERAND_OBJECT *NextDesc; 195 ACPI_OPERAND_OBJECT *StartDesc; 196 ACPI_OPERAND_OBJECT **LastObjPtr; 197 198 199 ACPI_FUNCTION_TRACE_PTR (UtDeleteInternalObj, Object); 200 201 202 if (!Object) 203 { 204 return_VOID; 205 } 206 207 /* 208 * Must delete or free any pointers within the object that are not 209 * actual ACPI objects (for example, a raw buffer pointer). 210 */ 211 switch (Object->Common.Type) 212 { 213 case ACPI_TYPE_STRING: 214 215 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n", 216 Object, Object->String.Pointer)); 217 218 /* Free the actual string buffer */ 219 220 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) 221 { 222 /* But only if it is NOT a pointer into an ACPI table */ 223 224 ObjPointer = Object->String.Pointer; 225 } 226 break; 227 228 case ACPI_TYPE_BUFFER: 229 230 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n", 231 Object, Object->Buffer.Pointer)); 232 233 /* Free the actual buffer */ 234 235 if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) 236 { 237 /* But only if it is NOT a pointer into an ACPI table */ 238 239 ObjPointer = Object->Buffer.Pointer; 240 } 241 break; 242 243 case ACPI_TYPE_PACKAGE: 244 245 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n", 246 Object->Package.Count)); 247 248 /* 249 * Elements of the package are not handled here, they are deleted 250 * separately 251 */ 252 253 /* Free the (variable length) element pointer array */ 254 255 ObjPointer = Object->Package.Elements; 256 break; 257 258 /* 259 * These objects have a possible list of notify handlers. 260 * Device object also may have a GPE block. 261 */ 262 case ACPI_TYPE_DEVICE: 263 264 if (Object->Device.GpeBlock) 265 { 266 (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock); 267 } 268 269 ACPI_FALLTHROUGH; 270 271 case ACPI_TYPE_PROCESSOR: 272 case ACPI_TYPE_THERMAL: 273 274 /* Walk the address handler list for this object */ 275 276 HandlerDesc = Object->CommonNotify.Handler; 277 while (HandlerDesc) 278 { 279 NextDesc = HandlerDesc->AddressSpace.Next; 280 AcpiUtRemoveReference (HandlerDesc); 281 HandlerDesc = NextDesc; 282 } 283 break; 284 285 case ACPI_TYPE_MUTEX: 286 287 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 288 "***** Mutex %p, OS Mutex %p\n", 289 Object, Object->Mutex.OsMutex)); 290 291 if (Object == AcpiGbl_GlobalLockMutex) 292 { 293 /* Global Lock has extra semaphore */ 294 295 (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore); 296 AcpiGbl_GlobalLockSemaphore = NULL; 297 298 AcpiOsDeleteMutex (Object->Mutex.OsMutex); 299 AcpiGbl_GlobalLockMutex = NULL; 300 } 301 else 302 { 303 AcpiExUnlinkMutex (Object); 304 AcpiOsDeleteMutex (Object->Mutex.OsMutex); 305 } 306 break; 307 308 case ACPI_TYPE_EVENT: 309 310 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 311 "***** Event %p, OS Semaphore %p\n", 312 Object, Object->Event.OsSemaphore)); 313 314 (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore); 315 Object->Event.OsSemaphore = NULL; 316 break; 317 318 case ACPI_TYPE_METHOD: 319 320 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 321 "***** Method %p\n", Object)); 322 323 /* Delete the method mutex if it exists */ 324 325 if (Object->Method.Mutex) 326 { 327 AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex); 328 AcpiUtDeleteObjectDesc (Object->Method.Mutex); 329 Object->Method.Mutex = NULL; 330 } 331 332 if (Object->Method.Node) 333 { 334 Object->Method.Node = NULL; 335 } 336 break; 337 338 case ACPI_TYPE_REGION: 339 340 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 341 "***** Region %p\n", Object)); 342 343 /* 344 * Update AddressRange list. However, only permanent regions 345 * are installed in this list. (Not created within a method) 346 */ 347 if (!(Object->Region.Node->Flags & ANOBJ_TEMPORARY)) 348 { 349 AcpiUtRemoveAddressRange (Object->Region.SpaceId, 350 Object->Region.Node); 351 } 352 353 SecondDesc = AcpiNsGetSecondaryObject (Object); 354 if (SecondDesc) 355 { 356 /* 357 * Free the RegionContext if and only if the handler is one of the 358 * default handlers -- and therefore, we created the context object 359 * locally, it was not created by an external caller. 360 */ 361 HandlerDesc = Object->Region.Handler; 362 if (HandlerDesc) 363 { 364 NextDesc = HandlerDesc->AddressSpace.RegionList; 365 StartDesc = NextDesc; 366 LastObjPtr = &HandlerDesc->AddressSpace.RegionList; 367 368 /* Remove the region object from the handler list */ 369 370 while (NextDesc) 371 { 372 if (NextDesc == Object) 373 { 374 *LastObjPtr = NextDesc->Region.Next; 375 break; 376 } 377 378 /* Walk the linked list of handlers */ 379 380 LastObjPtr = &NextDesc->Region.Next; 381 NextDesc = NextDesc->Region.Next; 382 383 /* Prevent infinite loop if list is corrupted */ 384 385 if (NextDesc == StartDesc) 386 { 387 ACPI_ERROR ((AE_INFO, 388 "Circular region list in address handler object %p", 389 HandlerDesc)); 390 return_VOID; 391 } 392 } 393 394 if (HandlerDesc->AddressSpace.HandlerFlags & 395 ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) 396 { 397 /* Deactivate region and free region context */ 398 399 if (HandlerDesc->AddressSpace.Setup) 400 { 401 (void) HandlerDesc->AddressSpace.Setup (Object, 402 ACPI_REGION_DEACTIVATE, 403 HandlerDesc->AddressSpace.Context, 404 &SecondDesc->Extra.RegionContext); 405 } 406 } 407 408 AcpiUtRemoveReference (HandlerDesc); 409 } 410 411 /* Now we can free the Extra object */ 412 413 AcpiUtDeleteObjectDesc (SecondDesc); 414 } 415 if (Object->Field.InternalPccBuffer) 416 { 417 ACPI_FREE(Object->Field.InternalPccBuffer); 418 } 419 420 break; 421 422 case ACPI_TYPE_BUFFER_FIELD: 423 424 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 425 "***** Buffer Field %p\n", Object)); 426 427 SecondDesc = AcpiNsGetSecondaryObject (Object); 428 if (SecondDesc) 429 { 430 AcpiUtDeleteObjectDesc (SecondDesc); 431 } 432 break; 433 434 case ACPI_TYPE_LOCAL_BANK_FIELD: 435 436 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 437 "***** Bank Field %p\n", Object)); 438 439 SecondDesc = AcpiNsGetSecondaryObject (Object); 440 if (SecondDesc) 441 { 442 AcpiUtDeleteObjectDesc (SecondDesc); 443 } 444 break; 445 446 default: 447 448 break; 449 } 450 451 /* Free any allocated memory (pointer within the object) found above */ 452 453 if (ObjPointer) 454 { 455 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n", 456 ObjPointer)); 457 ACPI_FREE (ObjPointer); 458 } 459 460 /* Now the object can be safely deleted */ 461 462 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, "%s: Deleting Object %p [%s]\n", 463 ACPI_GET_FUNCTION_NAME, Object, AcpiUtGetObjectTypeName (Object))); 464 465 AcpiUtDeleteObjectDesc (Object); 466 return_VOID; 467 } 468 469 470 /******************************************************************************* 471 * 472 * FUNCTION: AcpiUtDeleteInternalObjectList 473 * 474 * PARAMETERS: ObjList - Pointer to the list to be deleted 475 * 476 * RETURN: None 477 * 478 * DESCRIPTION: This function deletes an internal object list, including both 479 * simple objects and package objects 480 * 481 ******************************************************************************/ 482 483 void 484 AcpiUtDeleteInternalObjectList ( 485 ACPI_OPERAND_OBJECT **ObjList) 486 { 487 ACPI_OPERAND_OBJECT **InternalObj; 488 489 490 ACPI_FUNCTION_ENTRY (); 491 492 493 /* Walk the null-terminated internal list */ 494 495 for (InternalObj = ObjList; *InternalObj; InternalObj++) 496 { 497 AcpiUtRemoveReference (*InternalObj); 498 } 499 500 /* Free the combined parameter pointer list and object array */ 501 502 ACPI_FREE (ObjList); 503 return; 504 } 505 506 507 /******************************************************************************* 508 * 509 * FUNCTION: AcpiUtUpdateRefCount 510 * 511 * PARAMETERS: Object - Object whose ref count is to be updated 512 * Action - What to do (REF_INCREMENT or REF_DECREMENT) 513 * 514 * RETURN: None. Sets new reference count within the object 515 * 516 * DESCRIPTION: Modify the reference count for an internal acpi object 517 * 518 ******************************************************************************/ 519 520 static void 521 AcpiUtUpdateRefCount ( 522 ACPI_OPERAND_OBJECT *Object, 523 UINT32 Action) 524 { 525 UINT16 OriginalCount; 526 UINT16 NewCount = 0; 527 ACPI_CPU_FLAGS LockFlags; 528 char *Message; 529 530 531 ACPI_FUNCTION_NAME (UtUpdateRefCount); 532 533 534 if (!Object) 535 { 536 return; 537 } 538 539 /* 540 * Always get the reference count lock. Note: Interpreter and/or 541 * Namespace is not always locked when this function is called. 542 */ 543 LockFlags = AcpiOsAcquireLock (AcpiGbl_ReferenceCountLock); 544 OriginalCount = Object->Common.ReferenceCount; 545 546 /* Perform the reference count action (increment, decrement) */ 547 548 switch (Action) 549 { 550 case REF_INCREMENT: 551 552 NewCount = OriginalCount + 1; 553 Object->Common.ReferenceCount = NewCount; 554 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); 555 556 /* The current reference count should never be zero here */ 557 558 if (!OriginalCount) 559 { 560 ACPI_WARNING ((AE_INFO, 561 "Obj %p, Reference Count was zero before increment\n", 562 Object)); 563 } 564 565 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 566 "Obj %p Type %.2X [%s] Refs %.2X [Incremented]\n", 567 Object, Object->Common.Type, 568 AcpiUtGetObjectTypeName (Object), NewCount)); 569 Message = "Incremement"; 570 break; 571 572 case REF_DECREMENT: 573 574 /* The current reference count must be non-zero */ 575 576 if (OriginalCount) 577 { 578 NewCount = OriginalCount - 1; 579 Object->Common.ReferenceCount = NewCount; 580 } 581 582 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); 583 584 if (!OriginalCount) 585 { 586 ACPI_WARNING ((AE_INFO, 587 "Obj %p, Reference Count is already zero, cannot decrement\n", 588 Object)); 589 } 590 591 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, 592 "%s: Obj %p Type %.2X Refs %.2X [Decremented]\n", 593 ACPI_GET_FUNCTION_NAME, Object, Object->Common.Type, NewCount)); 594 595 /* Actually delete the object on a reference count of zero */ 596 597 if (NewCount == 0) 598 { 599 AcpiUtDeleteInternalObj (Object); 600 } 601 Message = "Decrement"; 602 break; 603 604 default: 605 606 AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); 607 ACPI_ERROR ((AE_INFO, "Unknown Reference Count action (0x%X)", 608 Action)); 609 return; 610 } 611 612 /* 613 * Sanity check the reference count, for debug purposes only. 614 * (A deleted object will have a huge reference count) 615 */ 616 if (NewCount > ACPI_MAX_REFERENCE_COUNT) 617 { 618 ACPI_WARNING ((AE_INFO, 619 "Large Reference Count (0x%X) in object %p, Type=0x%.2X Operation=%s", 620 NewCount, Object, Object->Common.Type, Message)); 621 } 622 } 623 624 625 /******************************************************************************* 626 * 627 * FUNCTION: AcpiUtUpdateObjectReference 628 * 629 * PARAMETERS: Object - Increment or decrement the ref count for 630 * this object and all sub-objects 631 * Action - Either REF_INCREMENT or REF_DECREMENT 632 * 633 * RETURN: Status 634 * 635 * DESCRIPTION: Increment or decrement the object reference count 636 * 637 * Object references are incremented when: 638 * 1) An object is attached to a Node (namespace object) 639 * 2) An object is copied (all subobjects must be incremented) 640 * 641 * Object references are decremented when: 642 * 1) An object is detached from an Node 643 * 644 ******************************************************************************/ 645 646 ACPI_STATUS 647 AcpiUtUpdateObjectReference ( 648 ACPI_OPERAND_OBJECT *Object, 649 UINT16 Action) 650 { 651 ACPI_STATUS Status = AE_OK; 652 ACPI_GENERIC_STATE *StateList = NULL; 653 ACPI_OPERAND_OBJECT *NextObject = NULL; 654 ACPI_OPERAND_OBJECT *PrevObject; 655 ACPI_GENERIC_STATE *State; 656 UINT32 i; 657 658 659 ACPI_FUNCTION_NAME (UtUpdateObjectReference); 660 661 662 while (Object) 663 { 664 /* Make sure that this isn't a namespace handle */ 665 666 if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED) 667 { 668 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 669 "Object %p is NS handle\n", Object)); 670 return (AE_OK); 671 } 672 673 /* 674 * All sub-objects must have their reference count updated 675 * also. Different object types have different subobjects. 676 */ 677 switch (Object->Common.Type) 678 { 679 case ACPI_TYPE_DEVICE: 680 case ACPI_TYPE_PROCESSOR: 681 case ACPI_TYPE_POWER: 682 case ACPI_TYPE_THERMAL: 683 /* 684 * Update the notify objects for these types (if present) 685 * Two lists, system and device notify handlers. 686 */ 687 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) 688 { 689 PrevObject = Object->CommonNotify.NotifyList[i]; 690 while (PrevObject) 691 { 692 NextObject = PrevObject->Notify.Next[i]; 693 AcpiUtUpdateRefCount (PrevObject, Action); 694 PrevObject = NextObject; 695 } 696 } 697 break; 698 699 case ACPI_TYPE_PACKAGE: 700 /* 701 * We must update all the sub-objects of the package, 702 * each of whom may have their own sub-objects. 703 */ 704 for (i = 0; i < Object->Package.Count; i++) 705 { 706 /* 707 * Null package elements are legal and can be simply 708 * ignored. 709 */ 710 NextObject = Object->Package.Elements[i]; 711 if (!NextObject) 712 { 713 continue; 714 } 715 716 switch (NextObject->Common.Type) 717 { 718 case ACPI_TYPE_INTEGER: 719 case ACPI_TYPE_STRING: 720 case ACPI_TYPE_BUFFER: 721 /* 722 * For these very simple sub-objects, we can just 723 * update the reference count here and continue. 724 * Greatly increases performance of this operation. 725 */ 726 AcpiUtUpdateRefCount (NextObject, Action); 727 break; 728 729 default: 730 /* 731 * For complex sub-objects, push them onto the stack 732 * for later processing (this eliminates recursion.) 733 */ 734 Status = AcpiUtCreateUpdateStateAndPush ( 735 NextObject, Action, &StateList); 736 if (ACPI_FAILURE (Status)) 737 { 738 goto ErrorExit; 739 } 740 break; 741 } 742 } 743 744 NextObject = NULL; 745 break; 746 747 case ACPI_TYPE_BUFFER_FIELD: 748 749 NextObject = Object->BufferField.BufferObj; 750 break; 751 752 case ACPI_TYPE_LOCAL_BANK_FIELD: 753 754 NextObject = Object->BankField.BankObj; 755 Status = AcpiUtCreateUpdateStateAndPush ( 756 Object->BankField.RegionObj, Action, &StateList); 757 if (ACPI_FAILURE (Status)) 758 { 759 goto ErrorExit; 760 } 761 break; 762 763 case ACPI_TYPE_LOCAL_INDEX_FIELD: 764 765 NextObject = Object->IndexField.IndexObj; 766 Status = AcpiUtCreateUpdateStateAndPush ( 767 Object->IndexField.DataObj, Action, &StateList); 768 if (ACPI_FAILURE (Status)) 769 { 770 goto ErrorExit; 771 } 772 break; 773 774 case ACPI_TYPE_LOCAL_REFERENCE: 775 /* 776 * The target of an Index (a package, string, or buffer) or a named 777 * reference must track changes to the ref count of the index or 778 * target object. 779 */ 780 if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) || 781 (Object->Reference.Class== ACPI_REFCLASS_NAME)) 782 { 783 NextObject = Object->Reference.Object; 784 } 785 break; 786 787 case ACPI_TYPE_LOCAL_REGION_FIELD: 788 case ACPI_TYPE_REGION: 789 default: 790 791 break; /* No subobjects for all other types */ 792 } 793 794 /* 795 * Now we can update the count in the main object. This can only 796 * happen after we update the sub-objects in case this causes the 797 * main object to be deleted. 798 */ 799 AcpiUtUpdateRefCount (Object, Action); 800 Object = NULL; 801 802 /* Move on to the next object to be updated */ 803 804 if (NextObject) 805 { 806 Object = NextObject; 807 NextObject = NULL; 808 } 809 else if (StateList) 810 { 811 State = AcpiUtPopGenericState (&StateList); 812 Object = State->Update.Object; 813 AcpiUtDeleteGenericState (State); 814 } 815 } 816 817 return (AE_OK); 818 819 820 ErrorExit: 821 822 ACPI_EXCEPTION ((AE_INFO, Status, 823 "Could not update object reference count")); 824 825 /* Free any stacked Update State objects */ 826 827 while (StateList) 828 { 829 State = AcpiUtPopGenericState (&StateList); 830 AcpiUtDeleteGenericState (State); 831 } 832 833 return (Status); 834 } 835 836 837 /******************************************************************************* 838 * 839 * FUNCTION: AcpiUtAddReference 840 * 841 * PARAMETERS: Object - Object whose reference count is to be 842 * incremented 843 * 844 * RETURN: None 845 * 846 * DESCRIPTION: Add one reference to an ACPI object 847 * 848 ******************************************************************************/ 849 850 void 851 AcpiUtAddReference ( 852 ACPI_OPERAND_OBJECT *Object) 853 { 854 855 ACPI_FUNCTION_NAME (UtAddReference); 856 857 858 /* Ensure that we have a valid object */ 859 860 if (!AcpiUtValidInternalObject (Object)) 861 { 862 return; 863 } 864 865 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, 866 "Obj %p Current Refs=%X [To Be Incremented]\n", 867 Object, Object->Common.ReferenceCount)); 868 869 /* Increment the reference count */ 870 871 (void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT); 872 return; 873 } 874 875 876 /******************************************************************************* 877 * 878 * FUNCTION: AcpiUtRemoveReference 879 * 880 * PARAMETERS: Object - Object whose ref count will be decremented 881 * 882 * RETURN: None 883 * 884 * DESCRIPTION: Decrement the reference count of an ACPI internal object 885 * 886 ******************************************************************************/ 887 888 void 889 AcpiUtRemoveReference ( 890 ACPI_OPERAND_OBJECT *Object) 891 { 892 893 ACPI_FUNCTION_NAME (UtRemoveReference); 894 895 896 /* 897 * Allow a NULL pointer to be passed in, just ignore it. This saves 898 * each caller from having to check. Also, ignore NS nodes. 899 */ 900 if (!Object || 901 (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)) 902 903 { 904 return; 905 } 906 907 /* Ensure that we have a valid object */ 908 909 if (!AcpiUtValidInternalObject (Object)) 910 { 911 return; 912 } 913 914 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, 915 "%s: Obj %p Current Refs=%X [To Be Decremented]\n", 916 ACPI_GET_FUNCTION_NAME, Object, Object->Common.ReferenceCount)); 917 918 /* 919 * Decrement the reference count, and only actually delete the object 920 * if the reference count becomes 0. (Must also decrement the ref count 921 * of all subobjects!) 922 */ 923 (void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT); 924 return; 925 } 926