evgpe.c revision 138287
1/****************************************************************************** 2 * 3 * Module Name: evgpe - General Purpose Event handling and dispatch 4 * $Revision: 44 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#include "acpi.h" 118#include "acevents.h" 119#include "acnamesp.h" 120 121#define _COMPONENT ACPI_EVENTS 122 ACPI_MODULE_NAME ("evgpe") 123 124 125/******************************************************************************* 126 * 127 * FUNCTION: AcpiEvSetGpeType 128 * 129 * PARAMETERS: GpeEventInfo - GPE to set 130 * Type - New type 131 * 132 * RETURN: Status 133 * 134 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) 135 * 136 ******************************************************************************/ 137 138ACPI_STATUS 139AcpiEvSetGpeType ( 140 ACPI_GPE_EVENT_INFO *GpeEventInfo, 141 UINT8 Type) 142{ 143 ACPI_STATUS Status; 144 145 146 ACPI_FUNCTION_TRACE ("EvSetGpeType"); 147 148 149 /* Validate type and update register enable masks */ 150 151 switch (Type) 152 { 153 case ACPI_GPE_TYPE_WAKE: 154 case ACPI_GPE_TYPE_RUNTIME: 155 case ACPI_GPE_TYPE_WAKE_RUN: 156 break; 157 158 default: 159 return_ACPI_STATUS (AE_BAD_PARAMETER); 160 } 161 162 /* Disable the GPE if currently enabled */ 163 164 Status = AcpiEvDisableGpe (GpeEventInfo); 165 166 /* Type was validated above */ 167 168 GpeEventInfo->Flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ 169 GpeEventInfo->Flags |= Type; /* Insert type */ 170 return_ACPI_STATUS (Status); 171} 172 173 174/******************************************************************************* 175 * 176 * FUNCTION: AcpiEvUpdateGpeEnableMasks 177 * 178 * PARAMETERS: GpeEventInfo - GPE to update 179 * Type - What to do: ACPI_GPE_DISABLE or 180 * ACPI_GPE_ENABLE 181 * 182 * RETURN: Status 183 * 184 * DESCRIPTION: Updates GPE register enable masks based on the GPE type 185 * 186 ******************************************************************************/ 187 188ACPI_STATUS 189AcpiEvUpdateGpeEnableMasks ( 190 ACPI_GPE_EVENT_INFO *GpeEventInfo, 191 UINT8 Type) 192{ 193 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 194 UINT8 RegisterBit; 195 196 197 ACPI_FUNCTION_TRACE ("EvUpdateGpeEnableMasks"); 198 199 200 GpeRegisterInfo = GpeEventInfo->RegisterInfo; 201 if (!GpeRegisterInfo) 202 { 203 return_ACPI_STATUS (AE_NOT_EXIST); 204 } 205 RegisterBit = GpeEventInfo->RegisterBit; 206 207 /* 1) Disable case. Simply clear all enable bits */ 208 209 if (Type == ACPI_GPE_DISABLE) 210 { 211 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 212 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 213 return_ACPI_STATUS (AE_OK); 214 } 215 216 /* 2) Enable case. Set/Clear the appropriate enable bits */ 217 218 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 219 { 220 case ACPI_GPE_TYPE_WAKE: 221 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 222 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 223 break; 224 225 case ACPI_GPE_TYPE_RUNTIME: 226 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 227 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 228 break; 229 230 case ACPI_GPE_TYPE_WAKE_RUN: 231 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 232 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 233 break; 234 235 default: 236 return_ACPI_STATUS (AE_BAD_PARAMETER); 237 } 238 239 return_ACPI_STATUS (AE_OK); 240} 241 242 243/******************************************************************************* 244 * 245 * FUNCTION: AcpiEvEnableGpe 246 * 247 * PARAMETERS: GpeEventInfo - GPE to enable 248 * WriteToHardware - Enable now, or just mark data structs 249 * (WAKE GPEs should be deferred) 250 * 251 * RETURN: Status 252 * 253 * DESCRIPTION: Enable a GPE based on the GPE type 254 * 255 ******************************************************************************/ 256 257ACPI_STATUS 258AcpiEvEnableGpe ( 259 ACPI_GPE_EVENT_INFO *GpeEventInfo, 260 BOOLEAN WriteToHardware) 261{ 262 ACPI_STATUS Status; 263 264 265 ACPI_FUNCTION_TRACE ("EvEnableGpe"); 266 267 268 /* Make sure HW enable masks are updated */ 269 270 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_ENABLE); 271 if (ACPI_FAILURE (Status)) 272 { 273 return_ACPI_STATUS (Status); 274 } 275 276 /* Mark wake-enabled or HW enable, or both */ 277 278 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 279 { 280 case ACPI_GPE_TYPE_WAKE: 281 282 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 283 break; 284 285 case ACPI_GPE_TYPE_WAKE_RUN: 286 287 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 288 289 /*lint -fallthrough */ 290 291 case ACPI_GPE_TYPE_RUNTIME: 292 293 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 294 295 if (WriteToHardware) 296 { 297 /* Clear the GPE (of stale events), then enable it */ 298 299 Status = AcpiHwClearGpe (GpeEventInfo); 300 if (ACPI_FAILURE (Status)) 301 { 302 return_ACPI_STATUS (Status); 303 } 304 305 /* Enable the requested runtime GPE */ 306 307 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 308 } 309 break; 310 311 default: 312 return_ACPI_STATUS (AE_BAD_PARAMETER); 313 } 314 315 return_ACPI_STATUS (AE_OK); 316} 317 318 319/******************************************************************************* 320 * 321 * FUNCTION: AcpiEvDisableGpe 322 * 323 * PARAMETERS: GpeEventInfo - GPE to disable 324 * 325 * RETURN: Status 326 * 327 * DESCRIPTION: Disable a GPE based on the GPE type 328 * 329 ******************************************************************************/ 330 331ACPI_STATUS 332AcpiEvDisableGpe ( 333 ACPI_GPE_EVENT_INFO *GpeEventInfo) 334{ 335 ACPI_STATUS Status; 336 337 338 ACPI_FUNCTION_TRACE ("EvDisableGpe"); 339 340 341 if (!(GpeEventInfo->Flags & ACPI_GPE_ENABLE_MASK)) 342 { 343 return_ACPI_STATUS (AE_OK); 344 } 345 346 /* Make sure HW enable masks are updated */ 347 348 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_DISABLE); 349 if (ACPI_FAILURE (Status)) 350 { 351 return_ACPI_STATUS (Status); 352 } 353 354 /* Mark wake-disabled or HW disable, or both */ 355 356 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 357 { 358 case ACPI_GPE_TYPE_WAKE: 359 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 360 break; 361 362 case ACPI_GPE_TYPE_WAKE_RUN: 363 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 364 365 /*lint -fallthrough */ 366 367 case ACPI_GPE_TYPE_RUNTIME: 368 369 /* Disable the requested runtime GPE */ 370 371 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 372 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 373 break; 374 375 default: 376 return_ACPI_STATUS (AE_BAD_PARAMETER); 377 } 378 379 return_ACPI_STATUS (AE_OK); 380} 381 382 383/******************************************************************************* 384 * 385 * FUNCTION: AcpiEvGetGpeEventInfo 386 * 387 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 388 * GpeNumber - Raw GPE number 389 * 390 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE 391 * 392 * DESCRIPTION: Returns the EventInfo struct associated with this GPE. 393 * Validates the GpeBlock and the GpeNumber 394 * 395 * Should be called only when the GPE lists are semaphore locked 396 * and not subject to change. 397 * 398 ******************************************************************************/ 399 400ACPI_GPE_EVENT_INFO * 401AcpiEvGetGpeEventInfo ( 402 ACPI_HANDLE GpeDevice, 403 UINT32 GpeNumber) 404{ 405 ACPI_OPERAND_OBJECT *ObjDesc; 406 ACPI_GPE_BLOCK_INFO *GpeBlock; 407 ACPI_NATIVE_UINT i; 408 409 410 ACPI_FUNCTION_ENTRY (); 411 412 413 /* A NULL GpeBlock means use the FADT-defined GPE block(s) */ 414 415 if (!GpeDevice) 416 { 417 /* Examine GPE Block 0 and 1 (These blocks are permanent) */ 418 419 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) 420 { 421 GpeBlock = AcpiGbl_GpeFadtBlocks[i]; 422 if (GpeBlock) 423 { 424 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 425 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) 426 { 427 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); 428 } 429 } 430 } 431 432 /* The GpeNumber was not in the range of either FADT GPE block */ 433 434 return (NULL); 435 } 436 437 /* A Non-NULL GpeDevice means this is a GPE Block Device */ 438 439 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); 440 if (!ObjDesc || 441 !ObjDesc->Device.GpeBlock) 442 { 443 return (NULL); 444 } 445 446 GpeBlock = ObjDesc->Device.GpeBlock; 447 448 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 449 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) 450 { 451 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); 452 } 453 454 return (NULL); 455} 456 457 458/******************************************************************************* 459 * 460 * FUNCTION: AcpiEvGpeDetect 461 * 462 * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. 463 * Can have multiple GPE blocks attached. 464 * 465 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 466 * 467 * DESCRIPTION: Detect if any GP events have occurred. This function is 468 * executed at interrupt level. 469 * 470 ******************************************************************************/ 471 472UINT32 473AcpiEvGpeDetect ( 474 ACPI_GPE_XRUPT_INFO *GpeXruptList) 475{ 476 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; 477 UINT8 EnabledStatusByte; 478 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 479 UINT32 StatusReg; 480 UINT32 EnableReg; 481 ACPI_STATUS Status; 482 ACPI_GPE_BLOCK_INFO *GpeBlock; 483 ACPI_NATIVE_UINT i; 484 ACPI_NATIVE_UINT j; 485 486 487 ACPI_FUNCTION_NAME ("EvGpeDetect"); 488 489 /* Check for the case where there are no GPEs */ 490 491 if (!GpeXruptList) 492 { 493 return (IntStatus); 494 } 495 496 /* Examine all GPE blocks attached to this interrupt level */ 497 498 AcpiOsAcquireLock (AcpiGbl_GpeLock, ACPI_ISR); 499 GpeBlock = GpeXruptList->GpeBlockListHead; 500 while (GpeBlock) 501 { 502 /* 503 * Read all of the 8-bit GPE status and enable registers 504 * in this GPE block, saving all of them. 505 * Find all currently active GP events. 506 */ 507 for (i = 0; i < GpeBlock->RegisterCount; i++) 508 { 509 /* Get the next status/enable pair */ 510 511 GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; 512 513 /* Read the Status Register */ 514 515 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &StatusReg, 516 &GpeRegisterInfo->StatusAddress); 517 if (ACPI_FAILURE (Status)) 518 { 519 goto UnlockAndExit; 520 } 521 522 /* Read the Enable Register */ 523 524 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &EnableReg, 525 &GpeRegisterInfo->EnableAddress); 526 if (ACPI_FAILURE (Status)) 527 { 528 goto UnlockAndExit; 529 } 530 531 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, 532 "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", 533 GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg)); 534 535 /* First check if there is anything active at all in this register */ 536 537 EnabledStatusByte = (UINT8) (StatusReg & EnableReg); 538 if (!EnabledStatusByte) 539 { 540 /* No active GPEs in this register, move on */ 541 542 continue; 543 } 544 545 /* Now look at the individual GPEs in this byte register */ 546 547 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) 548 { 549 /* Examine one GPE bit */ 550 551 if (EnabledStatusByte & AcpiGbl_DecodeTo8bit[j]) 552 { 553 /* 554 * Found an active GPE. Dispatch the event to a handler 555 * or method. 556 */ 557 IntStatus |= AcpiEvGpeDispatch ( 558 &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) + j], 559 (UINT32) j + GpeRegisterInfo->BaseGpeNumber); 560 } 561 } 562 } 563 564 GpeBlock = GpeBlock->Next; 565 } 566 567UnlockAndExit: 568 569 AcpiOsReleaseLock (AcpiGbl_GpeLock, ACPI_ISR); 570 return (IntStatus); 571} 572 573 574/******************************************************************************* 575 * 576 * FUNCTION: AcpiEvAsynchExecuteGpeMethod 577 * 578 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE 579 * 580 * RETURN: None 581 * 582 * DESCRIPTION: Perform the actual execution of a GPE control method. This 583 * function is called from an invocation of AcpiOsQueueForExecution 584 * (and therefore does NOT execute at interrupt level) so that 585 * the control method itself is not executed in the context of 586 * an interrupt handler. 587 * 588 ******************************************************************************/ 589 590static void ACPI_SYSTEM_XFACE 591AcpiEvAsynchExecuteGpeMethod ( 592 void *Context) 593{ 594 ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context; 595 UINT32 GpeNumber = 0; 596 ACPI_STATUS Status; 597 ACPI_GPE_EVENT_INFO LocalGpeEventInfo; 598 ACPI_PARAMETER_INFO Info; 599 600 601 ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod"); 602 603 604 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 605 if (ACPI_FAILURE (Status)) 606 { 607 return_VOID; 608 } 609 610 /* Must revalidate the GpeNumber/GpeBlock */ 611 612 if (!AcpiEvValidGpeEvent (GpeEventInfo)) 613 { 614 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 615 return_VOID; 616 } 617 618 /* Set the GPE flags for return to enabled state */ 619 620 (void) AcpiEvEnableGpe (GpeEventInfo, FALSE); 621 622 /* 623 * Take a snapshot of the GPE info for this level - we copy the 624 * info to prevent a race condition with RemoveHandler/RemoveBlock. 625 */ 626 ACPI_MEMCPY (&LocalGpeEventInfo, GpeEventInfo, sizeof (ACPI_GPE_EVENT_INFO)); 627 628 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 629 if (ACPI_FAILURE (Status)) 630 { 631 return_VOID; 632 } 633 634 /* 635 * Must check for control method type dispatch one more 636 * time to avoid race with EvGpeInstallHandler 637 */ 638 if ((LocalGpeEventInfo.Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_METHOD) 639 { 640 /* 641 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx 642 * control method that corresponds to this GPE 643 */ 644 Info.Node = LocalGpeEventInfo.Dispatch.MethodNode; 645 Info.Parameters = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT *, GpeEventInfo); 646 Info.ParameterType = ACPI_PARAM_GPE; 647 648 Status = AcpiNsEvaluateByHandle (&Info); 649 if (ACPI_FAILURE (Status)) 650 { 651 ACPI_REPORT_ERROR (( 652 "%s while evaluating method [%4.4s] for GPE[%2X]\n", 653 AcpiFormatException (Status), 654 AcpiUtGetNodeName (LocalGpeEventInfo.Dispatch.MethodNode), 655 GpeNumber)); 656 } 657 } 658 659 if ((LocalGpeEventInfo.Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) 660 { 661 /* 662 * GPE is level-triggered, we clear the GPE status bit after 663 * handling the event. 664 */ 665 Status = AcpiHwClearGpe (&LocalGpeEventInfo); 666 if (ACPI_FAILURE (Status)) 667 { 668 return_VOID; 669 } 670 } 671 672 /* Enable this GPE */ 673 674 (void) AcpiHwWriteGpeEnableReg (&LocalGpeEventInfo); 675 return_VOID; 676} 677 678 679/******************************************************************************* 680 * 681 * FUNCTION: AcpiEvGpeDispatch 682 * 683 * PARAMETERS: GpeEventInfo - info for this GPE 684 * GpeNumber - Number relative to the parent GPE block 685 * 686 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 687 * 688 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) 689 * or method (e.g. _Lxx/_Exx) handler. 690 * 691 * This function executes at interrupt level. 692 * 693 ******************************************************************************/ 694 695UINT32 696AcpiEvGpeDispatch ( 697 ACPI_GPE_EVENT_INFO *GpeEventInfo, 698 UINT32 GpeNumber) 699{ 700 ACPI_STATUS Status; 701 702 703 ACPI_FUNCTION_TRACE ("EvGpeDispatch"); 704 705 706 /* 707 * If edge-triggered, clear the GPE status bit now. Note that 708 * level-triggered events are cleared after the GPE is serviced. 709 */ 710 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) 711 { 712 Status = AcpiHwClearGpe (GpeEventInfo); 713 if (ACPI_FAILURE (Status)) 714 { 715 ACPI_REPORT_ERROR (("AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n", 716 GpeNumber)); 717 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 718 } 719 } 720 721 /* Save current system state */ 722 723 if (AcpiGbl_SystemAwakeAndRunning) 724 { 725 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 726 } 727 else 728 { 729 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 730 } 731 732 /* 733 * Dispatch the GPE to either an installed handler, or the control 734 * method associated with this GPE (_Lxx or _Exx). 735 * If a handler exists, we invoke it and do not attempt to run the method. 736 * If there is neither a handler nor a method, we disable the level to 737 * prevent further events from coming in here. 738 */ 739 switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) 740 { 741 case ACPI_GPE_DISPATCH_HANDLER: 742 743 /* 744 * Invoke the installed handler (at interrupt level) 745 * Ignore return status for now. TBD: leave GPE disabled on error? 746 */ 747 (void) GpeEventInfo->Dispatch.Handler->Address ( 748 GpeEventInfo->Dispatch.Handler->Context); 749 750 /* It is now safe to clear level-triggered events. */ 751 752 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) 753 { 754 Status = AcpiHwClearGpe (GpeEventInfo); 755 if (ACPI_FAILURE (Status)) 756 { 757 ACPI_REPORT_ERROR (( 758 "AcpiEvGpeDispatch: Unable to clear GPE[%2X]\n", 759 GpeNumber)); 760 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 761 } 762 } 763 break; 764 765 case ACPI_GPE_DISPATCH_METHOD: 766 767 /* 768 * Disable GPE, so it doesn't keep firing before the method has a 769 * chance to run. 770 */ 771 Status = AcpiEvDisableGpe (GpeEventInfo); 772 if (ACPI_FAILURE (Status)) 773 { 774 ACPI_REPORT_ERROR (( 775 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n", 776 GpeNumber)); 777 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 778 } 779 780 /* 781 * Execute the method associated with the GPE 782 * NOTE: Level-triggered GPEs are cleared after the method completes. 783 */ 784 if (ACPI_FAILURE (AcpiOsQueueForExecution (OSD_PRIORITY_GPE, 785 AcpiEvAsynchExecuteGpeMethod, 786 GpeEventInfo))) 787 { 788 ACPI_REPORT_ERROR (( 789 "AcpiEvGpeDispatch: Unable to queue handler for GPE[%2X], event is disabled\n", 790 GpeNumber)); 791 } 792 break; 793 794 default: 795 796 /* No handler or method to run! */ 797 798 ACPI_REPORT_ERROR (( 799 "AcpiEvGpeDispatch: No handler or method for GPE[%2X], disabling event\n", 800 GpeNumber)); 801 802 /* 803 * Disable the GPE. The GPE will remain disabled until the ACPI 804 * Core Subsystem is restarted, or a handler is installed. 805 */ 806 Status = AcpiEvDisableGpe (GpeEventInfo); 807 if (ACPI_FAILURE (Status)) 808 { 809 ACPI_REPORT_ERROR (( 810 "AcpiEvGpeDispatch: Unable to disable GPE[%2X]\n", 811 GpeNumber)); 812 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 813 } 814 break; 815 } 816 817 return_VALUE (ACPI_INTERRUPT_HANDLED); 818} 819 820 821#ifdef ACPI_GPE_NOTIFY_CHECK 822 823/******************************************************************************* 824 * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED 825 * 826 * FUNCTION: AcpiEvCheckForWakeOnlyGpe 827 * 828 * PARAMETERS: GpeEventInfo - info for this GPE 829 * 830 * RETURN: Status 831 * 832 * DESCRIPTION: Determine if a a GPE is "wake-only". 833 * 834 * Called from Notify() code in interpreter when a "DeviceWake" 835 * Notify comes in. 836 * 837 ******************************************************************************/ 838 839ACPI_STATUS 840AcpiEvCheckForWakeOnlyGpe ( 841 ACPI_GPE_EVENT_INFO *GpeEventInfo) 842{ 843 ACPI_STATUS Status; 844 845 846 ACPI_FUNCTION_TRACE ("EvCheckForWakeOnlyGpe"); 847 848 849 if ((GpeEventInfo) && /* Only >0 for _Lxx/_Exx */ 850 ((GpeEventInfo->Flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ 851 { 852 /* This must be a wake-only GPE, disable it */ 853 854 Status = AcpiEvDisableGpe (GpeEventInfo); 855 856 /* Set GPE to wake-only. Do not change wake disabled/enabled status */ 857 858 AcpiEvSetGpeType (GpeEventInfo, ACPI_GPE_TYPE_WAKE); 859 860 ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n", 861 GpeEventInfo)); 862 863 /* This was a wake-only GPE */ 864 865 return_ACPI_STATUS (AE_WAKE_ONLY_GPE); 866 } 867 868 return_ACPI_STATUS (AE_OK); 869} 870#endif 871 872 873