evgpe.c revision 151937
1/****************************************************************************** 2 * 3 * Module Name: evgpe - General Purpose Event handling and dispatch 4 * $Revision: 1.53 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2005, 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 <contrib/dev/acpica/acpi.h> 118#include <contrib/dev/acpica/acevents.h> 119#include <contrib/dev/acpica/acnamesp.h> 120 121#define _COMPONENT ACPI_EVENTS 122 ACPI_MODULE_NAME ("evgpe") 123 124/* Local prototypes */ 125 126static void ACPI_SYSTEM_XFACE 127AcpiEvAsynchExecuteGpeMethod ( 128 void *Context); 129 130 131/******************************************************************************* 132 * 133 * FUNCTION: AcpiEvSetGpeType 134 * 135 * PARAMETERS: GpeEventInfo - GPE to set 136 * Type - New type 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run) 141 * 142 ******************************************************************************/ 143 144ACPI_STATUS 145AcpiEvSetGpeType ( 146 ACPI_GPE_EVENT_INFO *GpeEventInfo, 147 UINT8 Type) 148{ 149 ACPI_STATUS Status; 150 151 152 ACPI_FUNCTION_TRACE ("EvSetGpeType"); 153 154 155 /* Validate type and update register enable masks */ 156 157 switch (Type) 158 { 159 case ACPI_GPE_TYPE_WAKE: 160 case ACPI_GPE_TYPE_RUNTIME: 161 case ACPI_GPE_TYPE_WAKE_RUN: 162 break; 163 164 default: 165 return_ACPI_STATUS (AE_BAD_PARAMETER); 166 } 167 168 /* Disable the GPE if currently enabled */ 169 170 Status = AcpiEvDisableGpe (GpeEventInfo); 171 172 /* Type was validated above */ 173 174 GpeEventInfo->Flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ 175 GpeEventInfo->Flags |= Type; /* Insert type */ 176 return_ACPI_STATUS (Status); 177} 178 179 180/******************************************************************************* 181 * 182 * FUNCTION: AcpiEvUpdateGpeEnableMasks 183 * 184 * PARAMETERS: GpeEventInfo - GPE to update 185 * Type - What to do: ACPI_GPE_DISABLE or 186 * ACPI_GPE_ENABLE 187 * 188 * RETURN: Status 189 * 190 * DESCRIPTION: Updates GPE register enable masks based on the GPE type 191 * 192 ******************************************************************************/ 193 194ACPI_STATUS 195AcpiEvUpdateGpeEnableMasks ( 196 ACPI_GPE_EVENT_INFO *GpeEventInfo, 197 UINT8 Type) 198{ 199 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 200 UINT8 RegisterBit; 201 202 203 ACPI_FUNCTION_TRACE ("EvUpdateGpeEnableMasks"); 204 205 206 GpeRegisterInfo = GpeEventInfo->RegisterInfo; 207 if (!GpeRegisterInfo) 208 { 209 return_ACPI_STATUS (AE_NOT_EXIST); 210 } 211 RegisterBit = GpeEventInfo->RegisterBit; 212 213 /* 1) Disable case. Simply clear all enable bits */ 214 215 if (Type == ACPI_GPE_DISABLE) 216 { 217 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 218 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 219 return_ACPI_STATUS (AE_OK); 220 } 221 222 /* 2) Enable case. Set/Clear the appropriate enable bits */ 223 224 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 225 { 226 case ACPI_GPE_TYPE_WAKE: 227 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 228 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 229 break; 230 231 case ACPI_GPE_TYPE_RUNTIME: 232 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 233 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 234 break; 235 236 case ACPI_GPE_TYPE_WAKE_RUN: 237 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, RegisterBit); 238 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, RegisterBit); 239 break; 240 241 default: 242 return_ACPI_STATUS (AE_BAD_PARAMETER); 243 } 244 245 return_ACPI_STATUS (AE_OK); 246} 247 248 249/******************************************************************************* 250 * 251 * FUNCTION: AcpiEvEnableGpe 252 * 253 * PARAMETERS: GpeEventInfo - GPE to enable 254 * WriteToHardware - Enable now, or just mark data structs 255 * (WAKE GPEs should be deferred) 256 * 257 * RETURN: Status 258 * 259 * DESCRIPTION: Enable a GPE based on the GPE type 260 * 261 ******************************************************************************/ 262 263ACPI_STATUS 264AcpiEvEnableGpe ( 265 ACPI_GPE_EVENT_INFO *GpeEventInfo, 266 BOOLEAN WriteToHardware) 267{ 268 ACPI_STATUS Status; 269 270 271 ACPI_FUNCTION_TRACE ("EvEnableGpe"); 272 273 274 /* Make sure HW enable masks are updated */ 275 276 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_ENABLE); 277 if (ACPI_FAILURE (Status)) 278 { 279 return_ACPI_STATUS (Status); 280 } 281 282 /* Mark wake-enabled or HW enable, or both */ 283 284 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 285 { 286 case ACPI_GPE_TYPE_WAKE: 287 288 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 289 break; 290 291 case ACPI_GPE_TYPE_WAKE_RUN: 292 293 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 294 295 /*lint -fallthrough */ 296 297 case ACPI_GPE_TYPE_RUNTIME: 298 299 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 300 301 if (WriteToHardware) 302 { 303 /* Clear the GPE (of stale events), then enable it */ 304 305 Status = AcpiHwClearGpe (GpeEventInfo); 306 if (ACPI_FAILURE (Status)) 307 { 308 return_ACPI_STATUS (Status); 309 } 310 311 /* Enable the requested runtime GPE */ 312 313 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 314 } 315 break; 316 317 default: 318 return_ACPI_STATUS (AE_BAD_PARAMETER); 319 } 320 321 return_ACPI_STATUS (AE_OK); 322} 323 324 325/******************************************************************************* 326 * 327 * FUNCTION: AcpiEvDisableGpe 328 * 329 * PARAMETERS: GpeEventInfo - GPE to disable 330 * 331 * RETURN: Status 332 * 333 * DESCRIPTION: Disable a GPE based on the GPE type 334 * 335 ******************************************************************************/ 336 337ACPI_STATUS 338AcpiEvDisableGpe ( 339 ACPI_GPE_EVENT_INFO *GpeEventInfo) 340{ 341 ACPI_STATUS Status; 342 343 344 ACPI_FUNCTION_TRACE ("EvDisableGpe"); 345 346 347 if (!(GpeEventInfo->Flags & ACPI_GPE_ENABLE_MASK)) 348 { 349 return_ACPI_STATUS (AE_OK); 350 } 351 352 /* Make sure HW enable masks are updated */ 353 354 Status = AcpiEvUpdateGpeEnableMasks (GpeEventInfo, ACPI_GPE_DISABLE); 355 if (ACPI_FAILURE (Status)) 356 { 357 return_ACPI_STATUS (Status); 358 } 359 360 /* Mark wake-disabled or HW disable, or both */ 361 362 switch (GpeEventInfo->Flags & ACPI_GPE_TYPE_MASK) 363 { 364 case ACPI_GPE_TYPE_WAKE: 365 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 366 break; 367 368 case ACPI_GPE_TYPE_WAKE_RUN: 369 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_WAKE_ENABLED); 370 371 /*lint -fallthrough */ 372 373 case ACPI_GPE_TYPE_RUNTIME: 374 375 /* Disable the requested runtime GPE */ 376 377 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_RUN_ENABLED); 378 Status = AcpiHwWriteGpeEnableReg (GpeEventInfo); 379 break; 380 381 default: 382 return_ACPI_STATUS (AE_BAD_PARAMETER); 383 } 384 385 return_ACPI_STATUS (AE_OK); 386} 387 388 389/******************************************************************************* 390 * 391 * FUNCTION: AcpiEvGetGpeEventInfo 392 * 393 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1 394 * GpeNumber - Raw GPE number 395 * 396 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE 397 * 398 * DESCRIPTION: Returns the EventInfo struct associated with this GPE. 399 * Validates the GpeBlock and the GpeNumber 400 * 401 * Should be called only when the GPE lists are semaphore locked 402 * and not subject to change. 403 * 404 ******************************************************************************/ 405 406ACPI_GPE_EVENT_INFO * 407AcpiEvGetGpeEventInfo ( 408 ACPI_HANDLE GpeDevice, 409 UINT32 GpeNumber) 410{ 411 ACPI_OPERAND_OBJECT *ObjDesc; 412 ACPI_GPE_BLOCK_INFO *GpeBlock; 413 ACPI_NATIVE_UINT i; 414 415 416 ACPI_FUNCTION_ENTRY (); 417 418 419 /* A NULL GpeBlock means use the FADT-defined GPE block(s) */ 420 421 if (!GpeDevice) 422 { 423 /* Examine GPE Block 0 and 1 (These blocks are permanent) */ 424 425 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) 426 { 427 GpeBlock = AcpiGbl_GpeFadtBlocks[i]; 428 if (GpeBlock) 429 { 430 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 431 (GpeNumber < GpeBlock->BlockBaseNumber + 432 (GpeBlock->RegisterCount * 8))) 433 { 434 return (&GpeBlock->EventInfo[GpeNumber - 435 GpeBlock->BlockBaseNumber]); 436 } 437 } 438 } 439 440 /* The GpeNumber was not in the range of either FADT GPE block */ 441 442 return (NULL); 443 } 444 445 /* A Non-NULL GpeDevice means this is a GPE Block Device */ 446 447 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice); 448 if (!ObjDesc || 449 !ObjDesc->Device.GpeBlock) 450 { 451 return (NULL); 452 } 453 454 GpeBlock = ObjDesc->Device.GpeBlock; 455 456 if ((GpeNumber >= GpeBlock->BlockBaseNumber) && 457 (GpeNumber < GpeBlock->BlockBaseNumber + (GpeBlock->RegisterCount * 8))) 458 { 459 return (&GpeBlock->EventInfo[GpeNumber - GpeBlock->BlockBaseNumber]); 460 } 461 462 return (NULL); 463} 464 465 466/******************************************************************************* 467 * 468 * FUNCTION: AcpiEvGpeDetect 469 * 470 * PARAMETERS: GpeXruptList - Interrupt block for this interrupt. 471 * Can have multiple GPE blocks attached. 472 * 473 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 474 * 475 * DESCRIPTION: Detect if any GP events have occurred. This function is 476 * executed at interrupt level. 477 * 478 ******************************************************************************/ 479 480UINT32 481AcpiEvGpeDetect ( 482 ACPI_GPE_XRUPT_INFO *GpeXruptList) 483{ 484 ACPI_STATUS Status; 485 ACPI_GPE_BLOCK_INFO *GpeBlock; 486 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 487 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; 488 UINT8 EnabledStatusByte; 489 UINT32 StatusReg; 490 UINT32 EnableReg; 491 ACPI_NATIVE_UINT Flags; 492 ACPI_NATIVE_UINT i; 493 ACPI_NATIVE_UINT j; 494 495 496 ACPI_FUNCTION_NAME ("EvGpeDetect"); 497 498 /* Check for the case where there are no GPEs */ 499 500 if (!GpeXruptList) 501 { 502 return (IntStatus); 503 } 504 505 /* Examine all GPE blocks attached to this interrupt level */ 506 507 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 508 GpeBlock = GpeXruptList->GpeBlockListHead; 509 while (GpeBlock) 510 { 511 /* 512 * Read all of the 8-bit GPE status and enable registers 513 * in this GPE block, saving all of them. 514 * Find all currently active GP events. 515 */ 516 for (i = 0; i < GpeBlock->RegisterCount; i++) 517 { 518 /* Get the next status/enable pair */ 519 520 GpeRegisterInfo = &GpeBlock->RegisterInfo[i]; 521 522 /* Read the Status Register */ 523 524 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &StatusReg, 525 &GpeRegisterInfo->StatusAddress); 526 if (ACPI_FAILURE (Status)) 527 { 528 goto UnlockAndExit; 529 } 530 531 /* Read the Enable Register */ 532 533 Status = AcpiHwLowLevelRead (ACPI_GPE_REGISTER_WIDTH, &EnableReg, 534 &GpeRegisterInfo->EnableAddress); 535 if (ACPI_FAILURE (Status)) 536 { 537 goto UnlockAndExit; 538 } 539 540 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS, 541 "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n", 542 GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg)); 543 544 /* Check if there is anything active at all in this register */ 545 546 EnabledStatusByte = (UINT8) (StatusReg & EnableReg); 547 if (!EnabledStatusByte) 548 { 549 /* No active GPEs in this register, move on */ 550 551 continue; 552 } 553 554 /* Now look at the individual GPEs in this byte register */ 555 556 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) 557 { 558 /* Examine one GPE bit */ 559 560 if (EnabledStatusByte & AcpiGbl_DecodeTo8bit[j]) 561 { 562 /* 563 * Found an active GPE. Dispatch the event to a handler 564 * or method. 565 */ 566 IntStatus |= AcpiEvGpeDispatch ( 567 &GpeBlock->EventInfo[(i * ACPI_GPE_REGISTER_WIDTH) + j], 568 (UINT32) j + GpeRegisterInfo->BaseGpeNumber); 569 } 570 } 571 } 572 573 GpeBlock = GpeBlock->Next; 574 } 575 576UnlockAndExit: 577 578 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 579 return (IntStatus); 580} 581 582 583/******************************************************************************* 584 * 585 * FUNCTION: AcpiEvAsynchExecuteGpeMethod 586 * 587 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE 588 * 589 * RETURN: None 590 * 591 * DESCRIPTION: Perform the actual execution of a GPE control method. This 592 * function is called from an invocation of AcpiOsQueueForExecution 593 * (and therefore does NOT execute at interrupt level) so that 594 * the control method itself is not executed in the context of 595 * an interrupt handler. 596 * 597 ******************************************************************************/ 598 599static void ACPI_SYSTEM_XFACE 600AcpiEvAsynchExecuteGpeMethod ( 601 void *Context) 602{ 603 ACPI_GPE_EVENT_INFO *GpeEventInfo = (void *) Context; 604 UINT32 GpeNumber = 0; 605 ACPI_STATUS Status; 606 ACPI_GPE_EVENT_INFO LocalGpeEventInfo; 607 ACPI_PARAMETER_INFO Info; 608 609 610 ACPI_FUNCTION_TRACE ("EvAsynchExecuteGpeMethod"); 611 612 613 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 614 if (ACPI_FAILURE (Status)) 615 { 616 return_VOID; 617 } 618 619 /* Must revalidate the GpeNumber/GpeBlock */ 620 621 if (!AcpiEvValidGpeEvent (GpeEventInfo)) 622 { 623 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 624 return_VOID; 625 } 626 627 /* Set the GPE flags for return to enabled state */ 628 629 (void) AcpiEvEnableGpe (GpeEventInfo, FALSE); 630 631 /* 632 * Take a snapshot of the GPE info for this level - we copy the 633 * info to prevent a race condition with RemoveHandler/RemoveBlock. 634 */ 635 ACPI_MEMCPY (&LocalGpeEventInfo, GpeEventInfo, 636 sizeof (ACPI_GPE_EVENT_INFO)); 637 638 Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 639 if (ACPI_FAILURE (Status)) 640 { 641 return_VOID; 642 } 643 644 /* 645 * Must check for control method type dispatch one more 646 * time to avoid race with EvGpeInstallHandler 647 */ 648 if ((LocalGpeEventInfo.Flags & ACPI_GPE_DISPATCH_MASK) == 649 ACPI_GPE_DISPATCH_METHOD) 650 { 651 /* 652 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx 653 * control method that corresponds to this GPE 654 */ 655 Info.Node = LocalGpeEventInfo.Dispatch.MethodNode; 656 Info.Parameters = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT *, GpeEventInfo); 657 Info.ParameterType = ACPI_PARAM_GPE; 658 659 Status = AcpiNsEvaluateByHandle (&Info); 660 if (ACPI_FAILURE (Status)) 661 { 662 ACPI_REPORT_ERROR (( 663 "%s while evaluating method [%4.4s] for GPE[%2X]\n", 664 AcpiFormatException (Status), 665 AcpiUtGetNodeName (LocalGpeEventInfo.Dispatch.MethodNode), 666 GpeNumber)); 667 } 668 } 669 670 if ((LocalGpeEventInfo.Flags & ACPI_GPE_XRUPT_TYPE_MASK) == 671 ACPI_GPE_LEVEL_TRIGGERED) 672 { 673 /* 674 * GPE is level-triggered, we clear the GPE status bit after 675 * handling the event. 676 */ 677 Status = AcpiHwClearGpe (&LocalGpeEventInfo); 678 if (ACPI_FAILURE (Status)) 679 { 680 return_VOID; 681 } 682 } 683 684 /* Enable this GPE */ 685 686 (void) AcpiHwWriteGpeEnableReg (&LocalGpeEventInfo); 687 return_VOID; 688} 689 690 691/******************************************************************************* 692 * 693 * FUNCTION: AcpiEvGpeDispatch 694 * 695 * PARAMETERS: GpeEventInfo - Info for this GPE 696 * GpeNumber - Number relative to the parent GPE block 697 * 698 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED 699 * 700 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) 701 * or method (e.g. _Lxx/_Exx) handler. 702 * 703 * This function executes at interrupt level. 704 * 705 ******************************************************************************/ 706 707UINT32 708AcpiEvGpeDispatch ( 709 ACPI_GPE_EVENT_INFO *GpeEventInfo, 710 UINT32 GpeNumber) 711{ 712 ACPI_STATUS Status; 713 714 715 ACPI_FUNCTION_TRACE ("EvGpeDispatch"); 716 717 718 /* 719 * If edge-triggered, clear the GPE status bit now. Note that 720 * level-triggered events are cleared after the GPE is serviced. 721 */ 722 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == 723 ACPI_GPE_EDGE_TRIGGERED) 724 { 725 Status = AcpiHwClearGpe (GpeEventInfo); 726 if (ACPI_FAILURE (Status)) 727 { 728 ACPI_REPORT_ERROR (( 729 "AcpiEvGpeDispatch: %s, Unable to clear GPE[%2X]\n", 730 AcpiFormatException (Status), GpeNumber)); 731 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); 732 } 733 } 734 735 /* Save current system state */ 736 737 if (AcpiGbl_SystemAwakeAndRunning) 738 { 739 ACPI_SET_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 740 } 741 else 742 { 743 ACPI_CLEAR_BIT (GpeEventInfo->Flags, ACPI_GPE_SYSTEM_RUNNING); 744 } 745 746 /* 747 * Dispatch the GPE to either an installed handler, or the control 748 * method associated with this GPE (_Lxx or _Exx). 749 * If a handler exists, we invoke it and do not attempt to run the method. 750 * If there is neither a handler nor a method, we disable the level to 751 * prevent further events from coming in here. 752 */ 753 switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) 754 { 755 case ACPI_GPE_DISPATCH_HANDLER: 756 757 /* 758 * Invoke the installed handler (at interrupt level) 759 * Ignore return status for now. TBD: leave GPE disabled on error? 760 */ 761 (void) GpeEventInfo->Dispatch.Handler->Address ( 762 GpeEventInfo->Dispatch.Handler->Context); 763 764 /* It is now safe to clear level-triggered events. */ 765 766 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) == 767 ACPI_GPE_LEVEL_TRIGGERED) 768 { 769 Status = AcpiHwClearGpe (GpeEventInfo); 770 if (ACPI_FAILURE (Status)) 771 { 772 ACPI_REPORT_ERROR (( 773 "AcpiEvGpeDispatch: %s, Unable to clear GPE[%2X]\n", 774 AcpiFormatException (Status), GpeNumber)); 775 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); 776 } 777 } 778 break; 779 780 case ACPI_GPE_DISPATCH_METHOD: 781 782 /* 783 * Disable GPE, so it doesn't keep firing before the method has a 784 * chance to run. 785 */ 786 Status = AcpiEvDisableGpe (GpeEventInfo); 787 if (ACPI_FAILURE (Status)) 788 { 789 ACPI_REPORT_ERROR (( 790 "AcpiEvGpeDispatch: %s, Unable to disable GPE[%2X]\n", 791 AcpiFormatException (Status), GpeNumber)); 792 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); 793 } 794 795 /* 796 * Execute the method associated with the GPE 797 * NOTE: Level-triggered GPEs are cleared after the method completes. 798 */ 799 Status = AcpiOsQueueForExecution (OSD_PRIORITY_GPE, 800 AcpiEvAsynchExecuteGpeMethod, GpeEventInfo); 801 if (ACPI_FAILURE (Status)) 802 { 803 ACPI_REPORT_ERROR (( 804 "AcpiEvGpeDispatch: %s, Unable to queue handler for GPE[%2X] - event disabled\n", 805 AcpiFormatException (Status), GpeNumber)); 806 } 807 break; 808 809 default: 810 811 /* No handler or method to run! */ 812 813 ACPI_REPORT_ERROR (( 814 "AcpiEvGpeDispatch: No handler or method for GPE[%2X], disabling event\n", 815 GpeNumber)); 816 817 /* 818 * Disable the GPE. The GPE will remain disabled until the ACPI 819 * Core Subsystem is restarted, or a handler is installed. 820 */ 821 Status = AcpiEvDisableGpe (GpeEventInfo); 822 if (ACPI_FAILURE (Status)) 823 { 824 ACPI_REPORT_ERROR (( 825 "AcpiEvGpeDispatch: %s, Unable to disable GPE[%2X]\n", 826 AcpiFormatException (Status), GpeNumber)); 827 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED); 828 } 829 break; 830 } 831 832 return_UINT32 (ACPI_INTERRUPT_HANDLED); 833} 834 835 836#ifdef ACPI_GPE_NOTIFY_CHECK 837/******************************************************************************* 838 * TBD: NOT USED, PROTOTYPE ONLY AND WILL PROBABLY BE REMOVED 839 * 840 * FUNCTION: AcpiEvCheckForWakeOnlyGpe 841 * 842 * PARAMETERS: GpeEventInfo - info for this GPE 843 * 844 * RETURN: Status 845 * 846 * DESCRIPTION: Determine if a a GPE is "wake-only". 847 * 848 * Called from Notify() code in interpreter when a "DeviceWake" 849 * Notify comes in. 850 * 851 ******************************************************************************/ 852 853ACPI_STATUS 854AcpiEvCheckForWakeOnlyGpe ( 855 ACPI_GPE_EVENT_INFO *GpeEventInfo) 856{ 857 ACPI_STATUS Status; 858 859 860 ACPI_FUNCTION_TRACE ("EvCheckForWakeOnlyGpe"); 861 862 863 if ((GpeEventInfo) && /* Only >0 for _Lxx/_Exx */ 864 ((GpeEventInfo->Flags & ACPI_GPE_SYSTEM_MASK) == ACPI_GPE_SYSTEM_RUNNING)) /* System state at GPE time */ 865 { 866 /* This must be a wake-only GPE, disable it */ 867 868 Status = AcpiEvDisableGpe (GpeEventInfo); 869 870 /* Set GPE to wake-only. Do not change wake disabled/enabled status */ 871 872 AcpiEvSetGpeType (GpeEventInfo, ACPI_GPE_TYPE_WAKE); 873 874 ACPI_REPORT_INFO (("GPE %p was updated from wake/run to wake-only\n", 875 GpeEventInfo)); 876 877 /* This was a wake-only GPE */ 878 879 return_ACPI_STATUS (AE_WAKE_ONLY_GPE); 880 } 881 882 return_ACPI_STATUS (AE_OK); 883} 884#endif 885 886 887