1 /****************************************************************************** 2 * 3 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2014, 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 *****************************************************************************/ 115 116 117 #define __EVRGNINI_C__ 118 119 #include "acpi.h" 120 #include "accommon.h" 121 #include "acevents.h" 122 #include "acnamesp.h" 123 124 #define _COMPONENT ACPI_EVENTS 125 ACPI_MODULE_NAME ("evrgnini") 126 127 /* Local prototypes */ 128 129 static BOOLEAN 130 AcpiEvIsPciRootBridge ( 131 ACPI_NAMESPACE_NODE *Node); 132 133 134 /******************************************************************************* 135 * 136 * FUNCTION: AcpiEvSystemMemoryRegionSetup 137 * 138 * PARAMETERS: Handle - Region we are interested in 139 * Function - Start or stop 140 * HandlerContext - Address space handler context 141 * RegionContext - Region specific context 142 * 143 * RETURN: Status 144 * 145 * DESCRIPTION: Setup a SystemMemory operation region 146 * 147 ******************************************************************************/ 148 149 ACPI_STATUS 150 AcpiEvSystemMemoryRegionSetup ( 151 ACPI_HANDLE Handle, 152 UINT32 Function, 153 void *HandlerContext, 154 void **RegionContext) 155 { 156 ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; 157 ACPI_MEM_SPACE_CONTEXT *LocalRegionContext; 158 159 160 ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); 161 162 163 if (Function == ACPI_REGION_DEACTIVATE) 164 { 165 if (*RegionContext) 166 { 167 LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; 168 169 /* Delete a cached mapping if present */ 170 171 if (LocalRegionContext->MappedLength) 172 { 173 AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress, 174 LocalRegionContext->MappedLength); 175 } 176 ACPI_FREE (LocalRegionContext); 177 *RegionContext = NULL; 178 } 179 return_ACPI_STATUS (AE_OK); 180 } 181 182 /* Create a new context */ 183 184 LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); 185 if (!(LocalRegionContext)) 186 { 187 return_ACPI_STATUS (AE_NO_MEMORY); 188 } 189 190 /* Save the region length and address for use in the handler */ 191 192 LocalRegionContext->Length = RegionDesc->Region.Length; 193 LocalRegionContext->Address = RegionDesc->Region.Address; 194 195 *RegionContext = LocalRegionContext; 196 return_ACPI_STATUS (AE_OK); 197 } 198 199 200 /******************************************************************************* 201 * 202 * FUNCTION: AcpiEvIoSpaceRegionSetup 203 * 204 * PARAMETERS: Handle - Region we are interested in 205 * Function - Start or stop 206 * HandlerContext - Address space handler context 207 * RegionContext - Region specific context 208 * 209 * RETURN: Status 210 * 211 * DESCRIPTION: Setup a IO operation region 212 * 213 ******************************************************************************/ 214 215 ACPI_STATUS 216 AcpiEvIoSpaceRegionSetup ( 217 ACPI_HANDLE Handle, 218 UINT32 Function, 219 void *HandlerContext, 220 void **RegionContext) 221 { 222 ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); 223 224 225 if (Function == ACPI_REGION_DEACTIVATE) 226 { 227 *RegionContext = NULL; 228 } 229 else 230 { 231 *RegionContext = HandlerContext; 232 } 233 234 return_ACPI_STATUS (AE_OK); 235 } 236 237 238 /******************************************************************************* 239 * 240 * FUNCTION: AcpiEvPciConfigRegionSetup 241 * 242 * PARAMETERS: Handle - Region we are interested in 243 * Function - Start or stop 244 * HandlerContext - Address space handler context 245 * RegionContext - Region specific context 246 * 247 * RETURN: Status 248 * 249 * DESCRIPTION: Setup a PCI_Config operation region 250 * 251 * MUTEX: Assumes namespace is not locked 252 * 253 ******************************************************************************/ 254 255 ACPI_STATUS 256 AcpiEvPciConfigRegionSetup ( 257 ACPI_HANDLE Handle, 258 UINT32 Function, 259 void *HandlerContext, 260 void **RegionContext) 261 { 262 ACPI_STATUS Status = AE_OK; 263 UINT64 PciValue; 264 ACPI_PCI_ID *PciId = *RegionContext; 265 ACPI_OPERAND_OBJECT *HandlerObj; 266 ACPI_NAMESPACE_NODE *ParentNode; 267 ACPI_NAMESPACE_NODE *PciRootNode; 268 ACPI_NAMESPACE_NODE *PciDeviceNode; 269 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 270 271 272 ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); 273 274 275 HandlerObj = RegionObj->Region.Handler; 276 if (!HandlerObj) 277 { 278 /* 279 * No installed handler. This shouldn't happen because the dispatch 280 * routine checks before we get here, but we check again just in case. 281 */ 282 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 283 "Attempting to init a region %p, with no handler\n", RegionObj)); 284 return_ACPI_STATUS (AE_NOT_EXIST); 285 } 286 287 *RegionContext = NULL; 288 if (Function == ACPI_REGION_DEACTIVATE) 289 { 290 if (PciId) 291 { 292 ACPI_FREE (PciId); 293 } 294 return_ACPI_STATUS (Status); 295 } 296 297 ParentNode = RegionObj->Region.Node->Parent; 298 299 /* 300 * Get the _SEG and _BBN values from the device upon which the handler 301 * is installed. 302 * 303 * We need to get the _SEG and _BBN objects relative to the PCI BUS device. 304 * This is the device the handler has been registered to handle. 305 */ 306 307 /* 308 * If the AddressSpace.Node is still pointing to the root, we need 309 * to scan upward for a PCI Root bridge and re-associate the OpRegion 310 * handlers with that device. 311 */ 312 if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) 313 { 314 /* Start search from the parent object */ 315 316 PciRootNode = ParentNode; 317 while (PciRootNode != AcpiGbl_RootNode) 318 { 319 /* Get the _HID/_CID in order to detect a RootBridge */ 320 321 if (AcpiEvIsPciRootBridge (PciRootNode)) 322 { 323 /* Install a handler for this PCI root bridge */ 324 325 Status = AcpiInstallAddressSpaceHandler ( 326 (ACPI_HANDLE) PciRootNode, 327 ACPI_ADR_SPACE_PCI_CONFIG, 328 ACPI_DEFAULT_HANDLER, NULL, NULL); 329 if (ACPI_FAILURE (Status)) 330 { 331 if (Status == AE_SAME_HANDLER) 332 { 333 /* 334 * It is OK if the handler is already installed on the 335 * root bridge. Still need to return a context object 336 * for the new PCI_Config operation region, however. 337 */ 338 Status = AE_OK; 339 } 340 else 341 { 342 ACPI_EXCEPTION ((AE_INFO, Status, 343 "Could not install PciConfig handler " 344 "for Root Bridge %4.4s", 345 AcpiUtGetNodeName (PciRootNode))); 346 } 347 } 348 break; 349 } 350 351 PciRootNode = PciRootNode->Parent; 352 } 353 354 /* PCI root bridge not found, use namespace root node */ 355 } 356 else 357 { 358 PciRootNode = HandlerObj->AddressSpace.Node; 359 } 360 361 /* 362 * If this region is now initialized, we are done. 363 * (InstallAddressSpaceHandler could have initialized it) 364 */ 365 if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) 366 { 367 return_ACPI_STATUS (AE_OK); 368 } 369 370 /* Region is still not initialized. Create a new context */ 371 372 PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); 373 if (!PciId) 374 { 375 return_ACPI_STATUS (AE_NO_MEMORY); 376 } 377 378 /* 379 * For PCI_Config space access, we need the segment, bus, device and 380 * function numbers. Acquire them here. 381 * 382 * Find the parent device object. (This allows the operation region to be 383 * within a subscope under the device, such as a control method.) 384 */ 385 PciDeviceNode = RegionObj->Region.Node; 386 while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) 387 { 388 PciDeviceNode = PciDeviceNode->Parent; 389 } 390 391 if (!PciDeviceNode) 392 { 393 ACPI_FREE (PciId); 394 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 395 } 396 397 /* 398 * Get the PCI device and function numbers from the _ADR object 399 * contained in the parent's scope. 400 */ 401 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 402 PciDeviceNode, &PciValue); 403 404 /* 405 * The default is zero, and since the allocation above zeroed the data, 406 * just do nothing on failure. 407 */ 408 if (ACPI_SUCCESS (Status)) 409 { 410 PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); 411 PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); 412 } 413 414 /* The PCI segment number comes from the _SEG method */ 415 416 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, 417 PciRootNode, &PciValue); 418 if (ACPI_SUCCESS (Status)) 419 { 420 PciId->Segment = ACPI_LOWORD (PciValue); 421 } 422 423 /* The PCI bus number comes from the _BBN method */ 424 425 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, 426 PciRootNode, &PciValue); 427 if (ACPI_SUCCESS (Status)) 428 { 429 PciId->Bus = ACPI_LOWORD (PciValue); 430 } 431 432 /* Complete/update the PCI ID for this device */ 433 434 Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node); 435 if (ACPI_FAILURE (Status)) 436 { 437 ACPI_FREE (PciId); 438 return_ACPI_STATUS (Status); 439 } 440 441 *RegionContext = PciId; 442 return_ACPI_STATUS (AE_OK); 443 } 444 445 446 /******************************************************************************* 447 * 448 * FUNCTION: AcpiEvIsPciRootBridge 449 * 450 * PARAMETERS: Node - Device node being examined 451 * 452 * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge 453 * 454 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by 455 * examining the _HID and _CID for the device. 456 * 457 ******************************************************************************/ 458 459 static BOOLEAN 460 AcpiEvIsPciRootBridge ( 461 ACPI_NAMESPACE_NODE *Node) 462 { 463 ACPI_STATUS Status; 464 ACPI_PNP_DEVICE_ID *Hid; 465 ACPI_PNP_DEVICE_ID_LIST *Cid; 466 UINT32 i; 467 BOOLEAN Match; 468 469 470 /* Get the _HID and check for a PCI Root Bridge */ 471 472 Status = AcpiUtExecute_HID (Node, &Hid); 473 if (ACPI_FAILURE (Status)) 474 { 475 return (FALSE); 476 } 477 478 Match = AcpiUtIsPciRootBridge (Hid->String); 479 ACPI_FREE (Hid); 480 481 if (Match) 482 { 483 return (TRUE); 484 } 485 486 /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ 487 488 Status = AcpiUtExecute_CID (Node, &Cid); 489 if (ACPI_FAILURE (Status)) 490 { 491 return (FALSE); 492 } 493 494 /* Check all _CIDs in the returned list */ 495 496 for (i = 0; i < Cid->Count; i++) 497 { 498 if (AcpiUtIsPciRootBridge (Cid->Ids[i].String)) 499 { 500 ACPI_FREE (Cid); 501 return (TRUE); 502 } 503 } 504 505 ACPI_FREE (Cid); 506 return (FALSE); 507 } 508 509 510 /******************************************************************************* 511 * 512 * FUNCTION: AcpiEvPciBarRegionSetup 513 * 514 * PARAMETERS: Handle - Region we are interested in 515 * Function - Start or stop 516 * HandlerContext - Address space handler context 517 * RegionContext - Region specific context 518 * 519 * RETURN: Status 520 * 521 * DESCRIPTION: Setup a PciBAR operation region 522 * 523 * MUTEX: Assumes namespace is not locked 524 * 525 ******************************************************************************/ 526 527 ACPI_STATUS 528 AcpiEvPciBarRegionSetup ( 529 ACPI_HANDLE Handle, 530 UINT32 Function, 531 void *HandlerContext, 532 void **RegionContext) 533 { 534 ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); 535 536 537 return_ACPI_STATUS (AE_OK); 538 } 539 540 541 /******************************************************************************* 542 * 543 * FUNCTION: AcpiEvCmosRegionSetup 544 * 545 * PARAMETERS: Handle - Region we are interested in 546 * Function - Start or stop 547 * HandlerContext - Address space handler context 548 * RegionContext - Region specific context 549 * 550 * RETURN: Status 551 * 552 * DESCRIPTION: Setup a CMOS operation region 553 * 554 * MUTEX: Assumes namespace is not locked 555 * 556 ******************************************************************************/ 557 558 ACPI_STATUS 559 AcpiEvCmosRegionSetup ( 560 ACPI_HANDLE Handle, 561 UINT32 Function, 562 void *HandlerContext, 563 void **RegionContext) 564 { 565 ACPI_FUNCTION_TRACE (EvCmosRegionSetup); 566 567 568 return_ACPI_STATUS (AE_OK); 569 } 570 571 572 /******************************************************************************* 573 * 574 * FUNCTION: AcpiEvDefaultRegionSetup 575 * 576 * PARAMETERS: Handle - Region we are interested in 577 * Function - Start or stop 578 * HandlerContext - Address space handler context 579 * RegionContext - Region specific context 580 * 581 * RETURN: Status 582 * 583 * DESCRIPTION: Default region initialization 584 * 585 ******************************************************************************/ 586 587 ACPI_STATUS 588 AcpiEvDefaultRegionSetup ( 589 ACPI_HANDLE Handle, 590 UINT32 Function, 591 void *HandlerContext, 592 void **RegionContext) 593 { 594 ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); 595 596 597 if (Function == ACPI_REGION_DEACTIVATE) 598 { 599 *RegionContext = NULL; 600 } 601 else 602 { 603 *RegionContext = HandlerContext; 604 } 605 606 return_ACPI_STATUS (AE_OK); 607 } 608 609 610 /******************************************************************************* 611 * 612 * FUNCTION: AcpiEvInitializeRegion 613 * 614 * PARAMETERS: RegionObj - Region we are initializing 615 * AcpiNsLocked - Is namespace locked? 616 * 617 * RETURN: Status 618 * 619 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 620 * for execution at a later time 621 * 622 * Get the appropriate address space handler for a newly 623 * created region. 624 * 625 * This also performs address space specific initialization. For 626 * example, PCI regions must have an _ADR object that contains 627 * a PCI address in the scope of the definition. This address is 628 * required to perform an access to PCI config space. 629 * 630 * MUTEX: Interpreter should be unlocked, because we may run the _REG 631 * method for this region. 632 * 633 ******************************************************************************/ 634 635 ACPI_STATUS 636 AcpiEvInitializeRegion ( 637 ACPI_OPERAND_OBJECT *RegionObj, 638 BOOLEAN AcpiNsLocked) 639 { 640 ACPI_OPERAND_OBJECT *HandlerObj; 641 ACPI_OPERAND_OBJECT *ObjDesc; 642 ACPI_ADR_SPACE_TYPE SpaceId; 643 ACPI_NAMESPACE_NODE *Node; 644 ACPI_STATUS Status; 645 ACPI_NAMESPACE_NODE *MethodNode; 646 ACPI_NAME *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG; 647 ACPI_OPERAND_OBJECT *RegionObj2; 648 649 650 ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked); 651 652 653 if (!RegionObj) 654 { 655 return_ACPI_STATUS (AE_BAD_PARAMETER); 656 } 657 658 if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) 659 { 660 return_ACPI_STATUS (AE_OK); 661 } 662 663 RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); 664 if (!RegionObj2) 665 { 666 return_ACPI_STATUS (AE_NOT_EXIST); 667 } 668 669 Node = RegionObj->Region.Node->Parent; 670 SpaceId = RegionObj->Region.SpaceId; 671 672 /* Setup defaults */ 673 674 RegionObj->Region.Handler = NULL; 675 RegionObj2->Extra.Method_REG = NULL; 676 RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE); 677 RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; 678 679 /* Find any "_REG" method associated with this region definition */ 680 681 Status = AcpiNsSearchOneScope ( 682 *RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode); 683 if (ACPI_SUCCESS (Status)) 684 { 685 /* 686 * The _REG method is optional and there can be only one per region 687 * definition. This will be executed when the handler is attached 688 * or removed 689 */ 690 RegionObj2->Extra.Method_REG = MethodNode; 691 } 692 693 /* 694 * The following loop depends upon the root Node having no parent 695 * ie: AcpiGbl_RootNode->ParentEntry being set to NULL 696 */ 697 while (Node) 698 { 699 /* Check to see if a handler exists */ 700 701 HandlerObj = NULL; 702 ObjDesc = AcpiNsGetAttachedObject (Node); 703 if (ObjDesc) 704 { 705 /* Can only be a handler if the object exists */ 706 707 switch (Node->Type) 708 { 709 case ACPI_TYPE_DEVICE: 710 711 HandlerObj = ObjDesc->Device.Handler; 712 break; 713 714 case ACPI_TYPE_PROCESSOR: 715 716 HandlerObj = ObjDesc->Processor.Handler; 717 break; 718 719 case ACPI_TYPE_THERMAL: 720 721 HandlerObj = ObjDesc->ThermalZone.Handler; 722 break; 723 724 case ACPI_TYPE_METHOD: 725 /* 726 * If we are executing module level code, the original 727 * Node's object was replaced by this Method object and we 728 * saved the handler in the method object. 729 * 730 * See AcpiNsExecModuleCode 731 */ 732 if (ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL) 733 { 734 HandlerObj = ObjDesc->Method.Dispatch.Handler; 735 } 736 break; 737 738 default: 739 740 /* Ignore other objects */ 741 742 break; 743 } 744 745 while (HandlerObj) 746 { 747 /* Is this handler of the correct type? */ 748 749 if (HandlerObj->AddressSpace.SpaceId == SpaceId) 750 { 751 /* Found correct handler */ 752 753 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 754 "Found handler %p for region %p in obj %p\n", 755 HandlerObj, RegionObj, ObjDesc)); 756 757 Status = AcpiEvAttachRegion (HandlerObj, RegionObj, 758 AcpiNsLocked); 759 760 /* 761 * Tell all users that this region is usable by 762 * running the _REG method 763 */ 764 if (AcpiNsLocked) 765 { 766 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 767 if (ACPI_FAILURE (Status)) 768 { 769 return_ACPI_STATUS (Status); 770 } 771 } 772 773 Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT); 774 775 if (AcpiNsLocked) 776 { 777 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 778 if (ACPI_FAILURE (Status)) 779 { 780 return_ACPI_STATUS (Status); 781 } 782 } 783 784 return_ACPI_STATUS (AE_OK); 785 } 786 787 /* Try next handler in the list */ 788 789 HandlerObj = HandlerObj->AddressSpace.Next; 790 } 791 } 792 793 /* This node does not have the handler we need; Pop up one level */ 794 795 Node = Node->Parent; 796 } 797 798 /* If we get here, there is no handler for this region */ 799 800 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, 801 "No handler for RegionType %s(%X) (RegionObj %p)\n", 802 AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); 803 804 return_ACPI_STATUS (AE_NOT_EXIST); 805 } 806