1 /****************************************************************************** 2 * 3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs) 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2012, 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 __EVXFGPE_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 ("evxfgpe") 126 127 128 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiUpdateAllGpes 132 * 133 * PARAMETERS: None 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Complete GPE initialization and enable all GPEs that have 138 * associated _Lxx or _Exx methods and are not pointed to by any 139 * device _PRW methods (this indicates that these GPEs are 140 * generally intended for system or device wakeup. Such GPEs 141 * have to be enabled directly when the devices whose _PRW 142 * methods point to them are set up for wakeup signaling.) 143 * 144 * NOTE: Should be called after any GPEs are added to the system. Primarily, 145 * after the system _PRW methods have been run, but also after a GPE Block 146 * Device has been added or if any new GPE methods have been added via a 147 * dynamic table load. 148 * 149 ******************************************************************************/ 150 151 ACPI_STATUS 152 AcpiUpdateAllGpes ( 153 void) 154 { 155 ACPI_STATUS Status; 156 157 158 ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes); 159 160 161 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 162 if (ACPI_FAILURE (Status)) 163 { 164 return_ACPI_STATUS (Status); 165 } 166 167 if (AcpiGbl_AllGpesInitialized) 168 { 169 goto UnlockAndExit; 170 } 171 172 Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL); 173 if (ACPI_SUCCESS (Status)) 174 { 175 AcpiGbl_AllGpesInitialized = TRUE; 176 } 177 178 UnlockAndExit: 179 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 180 return_ACPI_STATUS (Status); 181 } 182 183 ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes) 184 185 186 /******************************************************************************* 187 * 188 * FUNCTION: AcpiEnableGpe 189 * 190 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 191 * GpeNumber - GPE level within the GPE block 192 * 193 * RETURN: Status 194 * 195 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is 196 * hardware-enabled. 197 * 198 ******************************************************************************/ 199 200 ACPI_STATUS 201 AcpiEnableGpe ( 202 ACPI_HANDLE GpeDevice, 203 UINT32 GpeNumber) 204 { 205 ACPI_STATUS Status = AE_BAD_PARAMETER; 206 ACPI_GPE_EVENT_INFO *GpeEventInfo; 207 ACPI_CPU_FLAGS Flags; 208 209 210 ACPI_FUNCTION_TRACE (AcpiEnableGpe); 211 212 213 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 214 215 /* Ensure that we have a valid GPE number */ 216 217 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 218 if (GpeEventInfo) 219 { 220 Status = AcpiEvAddGpeReference (GpeEventInfo); 221 } 222 223 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 224 return_ACPI_STATUS (Status); 225 } 226 227 ACPI_EXPORT_SYMBOL (AcpiEnableGpe) 228 229 230 /******************************************************************************* 231 * 232 * FUNCTION: AcpiDisableGpe 233 * 234 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 235 * GpeNumber - GPE level within the GPE block 236 * 237 * RETURN: Status 238 * 239 * DESCRIPTION: Remove a reference to a GPE. When the last reference is 240 * removed, only then is the GPE disabled (for runtime GPEs), or 241 * the GPE mask bit disabled (for wake GPEs) 242 * 243 ******************************************************************************/ 244 245 ACPI_STATUS 246 AcpiDisableGpe ( 247 ACPI_HANDLE GpeDevice, 248 UINT32 GpeNumber) 249 { 250 ACPI_STATUS Status = AE_BAD_PARAMETER; 251 ACPI_GPE_EVENT_INFO *GpeEventInfo; 252 ACPI_CPU_FLAGS Flags; 253 254 255 ACPI_FUNCTION_TRACE (AcpiDisableGpe); 256 257 258 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 259 260 /* Ensure that we have a valid GPE number */ 261 262 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 263 if (GpeEventInfo) 264 { 265 Status = AcpiEvRemoveGpeReference (GpeEventInfo); 266 } 267 268 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 269 return_ACPI_STATUS (Status); 270 } 271 272 ACPI_EXPORT_SYMBOL (AcpiDisableGpe) 273 274 275 /******************************************************************************* 276 * 277 * FUNCTION: AcpiSetGpe 278 * 279 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 280 * GpeNumber - GPE level within the GPE block 281 * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE 282 * 283 * RETURN: Status 284 * 285 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses 286 * the reference count mechanism used in the AcpiEnableGpe and 287 * AcpiDisableGpe interfaces -- and should be used with care. 288 * 289 * Note: Typically used to disable a runtime GPE for short period of time, 290 * then re-enable it, without disturbing the existing reference counts. This 291 * is useful, for example, in the Embedded Controller (EC) driver. 292 * 293 ******************************************************************************/ 294 295 ACPI_STATUS 296 AcpiSetGpe ( 297 ACPI_HANDLE GpeDevice, 298 UINT32 GpeNumber, 299 UINT8 Action) 300 { 301 ACPI_GPE_EVENT_INFO *GpeEventInfo; 302 ACPI_STATUS Status; 303 ACPI_CPU_FLAGS Flags; 304 305 306 ACPI_FUNCTION_TRACE (AcpiSetGpe); 307 308 309 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 310 311 /* Ensure that we have a valid GPE number */ 312 313 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 314 if (!GpeEventInfo) 315 { 316 Status = AE_BAD_PARAMETER; 317 goto UnlockAndExit; 318 } 319 320 /* Perform the action */ 321 322 switch (Action) 323 { 324 case ACPI_GPE_ENABLE: 325 Status = AcpiEvEnableGpe (GpeEventInfo); 326 break; 327 328 case ACPI_GPE_DISABLE: 329 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE); 330 break; 331 332 default: 333 Status = AE_BAD_PARAMETER; 334 break; 335 } 336 337 UnlockAndExit: 338 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 339 return_ACPI_STATUS (Status); 340 } 341 342 ACPI_EXPORT_SYMBOL (AcpiSetGpe) 343 344 345 /******************************************************************************* 346 * 347 * FUNCTION: AcpiSetupGpeForWake 348 * 349 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW) 350 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 351 * GpeNumber - GPE level within the GPE block 352 * 353 * RETURN: Status 354 * 355 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This 356 * interface is intended to be used as the host executes the 357 * _PRW methods (Power Resources for Wake) in the system tables. 358 * Each _PRW appears under a Device Object (The WakeDevice), and 359 * contains the info for the wake GPE associated with the 360 * WakeDevice. 361 * 362 ******************************************************************************/ 363 364 ACPI_STATUS 365 AcpiSetupGpeForWake ( 366 ACPI_HANDLE WakeDevice, 367 ACPI_HANDLE GpeDevice, 368 UINT32 GpeNumber) 369 { 370 ACPI_STATUS Status; 371 ACPI_GPE_EVENT_INFO *GpeEventInfo; 372 ACPI_NAMESPACE_NODE *DeviceNode; 373 ACPI_GPE_NOTIFY_INFO *Notify; 374 ACPI_GPE_NOTIFY_INFO *NewNotify; 375 ACPI_CPU_FLAGS Flags; 376 377 378 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake); 379 380 381 /* Parameter Validation */ 382 383 if (!WakeDevice) 384 { 385 /* 386 * By forcing WakeDevice to be valid, we automatically enable the 387 * implicit notify feature on all hosts. 388 */ 389 return_ACPI_STATUS (AE_BAD_PARAMETER); 390 } 391 392 /* Handle root object case */ 393 394 if (WakeDevice == ACPI_ROOT_OBJECT) 395 { 396 DeviceNode = AcpiGbl_RootNode; 397 } 398 else 399 { 400 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice); 401 } 402 403 /* Validate WakeDevice is of type Device */ 404 405 if (DeviceNode->Type != ACPI_TYPE_DEVICE) 406 { 407 return_ACPI_STATUS (AE_BAD_PARAMETER); 408 } 409 410 /* 411 * Allocate a new notify object up front, in case it is needed. 412 * Memory allocation while holding a spinlock is a big no-no 413 * on some hosts. 414 */ 415 NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO)); 416 if (!NewNotify) 417 { 418 return_ACPI_STATUS (AE_NO_MEMORY); 419 } 420 421 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 422 423 /* Ensure that we have a valid GPE number */ 424 425 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 426 if (!GpeEventInfo) 427 { 428 Status = AE_BAD_PARAMETER; 429 goto UnlockAndExit; 430 } 431 432 /* 433 * If there is no method or handler for this GPE, then the 434 * WakeDevice will be notified whenever this GPE fires. This is 435 * known as an "implicit notify". Note: The GPE is assumed to be 436 * level-triggered (for windows compatibility). 437 */ 438 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == 439 ACPI_GPE_DISPATCH_NONE) 440 { 441 /* 442 * This is the first device for implicit notify on this GPE. 443 * Just set the flags here, and enter the NOTIFY block below. 444 */ 445 GpeEventInfo->Flags = 446 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); 447 } 448 449 /* 450 * If we already have an implicit notify on this GPE, add 451 * this device to the notify list. 452 */ 453 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == 454 ACPI_GPE_DISPATCH_NOTIFY) 455 { 456 /* Ensure that the device is not already in the list */ 457 458 Notify = GpeEventInfo->Dispatch.NotifyList; 459 while (Notify) 460 { 461 if (Notify->DeviceNode == DeviceNode) 462 { 463 Status = AE_ALREADY_EXISTS; 464 goto UnlockAndExit; 465 } 466 Notify = Notify->Next; 467 } 468 469 /* Add this device to the notify list for this GPE */ 470 471 NewNotify->DeviceNode = DeviceNode; 472 NewNotify->Next = GpeEventInfo->Dispatch.NotifyList; 473 GpeEventInfo->Dispatch.NotifyList = NewNotify; 474 NewNotify = NULL; 475 } 476 477 /* Mark the GPE as a possible wake event */ 478 479 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE; 480 Status = AE_OK; 481 482 483 UnlockAndExit: 484 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 485 486 /* Delete the notify object if it was not used above */ 487 488 if (NewNotify) 489 { 490 ACPI_FREE (NewNotify); 491 } 492 return_ACPI_STATUS (Status); 493 } 494 495 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake) 496 497 498 /******************************************************************************* 499 * 500 * FUNCTION: AcpiSetGpeWakeMask 501 * 502 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 503 * GpeNumber - GPE level within the GPE block 504 * Action - Enable or Disable 505 * 506 * RETURN: Status 507 * 508 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must 509 * already be marked as a WAKE GPE. 510 * 511 ******************************************************************************/ 512 513 ACPI_STATUS 514 AcpiSetGpeWakeMask ( 515 ACPI_HANDLE GpeDevice, 516 UINT32 GpeNumber, 517 UINT8 Action) 518 { 519 ACPI_STATUS Status = AE_OK; 520 ACPI_GPE_EVENT_INFO *GpeEventInfo; 521 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo; 522 ACPI_CPU_FLAGS Flags; 523 UINT32 RegisterBit; 524 525 526 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask); 527 528 529 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 530 531 /* 532 * Ensure that we have a valid GPE number and that this GPE is in 533 * fact a wake GPE 534 */ 535 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 536 if (!GpeEventInfo) 537 { 538 Status = AE_BAD_PARAMETER; 539 goto UnlockAndExit; 540 } 541 542 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE)) 543 { 544 Status = AE_TYPE; 545 goto UnlockAndExit; 546 } 547 548 GpeRegisterInfo = GpeEventInfo->RegisterInfo; 549 if (!GpeRegisterInfo) 550 { 551 Status = AE_NOT_EXIST; 552 goto UnlockAndExit; 553 } 554 555 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo); 556 557 /* Perform the action */ 558 559 switch (Action) 560 { 561 case ACPI_GPE_ENABLE: 562 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); 563 break; 564 565 case ACPI_GPE_DISABLE: 566 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit); 567 break; 568 569 default: 570 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action)); 571 Status = AE_BAD_PARAMETER; 572 break; 573 } 574 575 UnlockAndExit: 576 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 577 return_ACPI_STATUS (Status); 578 } 579 580 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask) 581 582 583 /******************************************************************************* 584 * 585 * FUNCTION: AcpiClearGpe 586 * 587 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 588 * GpeNumber - GPE level within the GPE block 589 * 590 * RETURN: Status 591 * 592 * DESCRIPTION: Clear an ACPI event (general purpose) 593 * 594 ******************************************************************************/ 595 596 ACPI_STATUS 597 AcpiClearGpe ( 598 ACPI_HANDLE GpeDevice, 599 UINT32 GpeNumber) 600 { 601 ACPI_STATUS Status = AE_OK; 602 ACPI_GPE_EVENT_INFO *GpeEventInfo; 603 ACPI_CPU_FLAGS Flags; 604 605 606 ACPI_FUNCTION_TRACE (AcpiClearGpe); 607 608 609 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 610 611 /* Ensure that we have a valid GPE number */ 612 613 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 614 if (!GpeEventInfo) 615 { 616 Status = AE_BAD_PARAMETER; 617 goto UnlockAndExit; 618 } 619 620 Status = AcpiHwClearGpe (GpeEventInfo); 621 622 UnlockAndExit: 623 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 624 return_ACPI_STATUS (Status); 625 } 626 627 ACPI_EXPORT_SYMBOL (AcpiClearGpe) 628 629 630 /******************************************************************************* 631 * 632 * FUNCTION: AcpiGetGpeStatus 633 * 634 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1 635 * GpeNumber - GPE level within the GPE block 636 * EventStatus - Where the current status of the event 637 * will be returned 638 * 639 * RETURN: Status 640 * 641 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled) 642 * 643 ******************************************************************************/ 644 645 ACPI_STATUS 646 AcpiGetGpeStatus ( 647 ACPI_HANDLE GpeDevice, 648 UINT32 GpeNumber, 649 ACPI_EVENT_STATUS *EventStatus) 650 { 651 ACPI_STATUS Status = AE_OK; 652 ACPI_GPE_EVENT_INFO *GpeEventInfo; 653 ACPI_CPU_FLAGS Flags; 654 655 656 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus); 657 658 659 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 660 661 /* Ensure that we have a valid GPE number */ 662 663 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 664 if (!GpeEventInfo) 665 { 666 Status = AE_BAD_PARAMETER; 667 goto UnlockAndExit; 668 } 669 670 /* Obtain status on the requested GPE number */ 671 672 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus); 673 674 UnlockAndExit: 675 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 676 return_ACPI_STATUS (Status); 677 } 678 679 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus) 680 681 682 /******************************************************************************* 683 * 684 * FUNCTION: AcpiFinishGpe 685 * 686 * PARAMETERS: GpeDevice - Namespace node for the GPE Block 687 * (NULL for FADT defined GPEs) 688 * GpeNumber - GPE level within the GPE block 689 * 690 * RETURN: Status 691 * 692 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE 693 * processing. Intended for use by asynchronous host-installed 694 * GPE handlers. The GPE is only reenabled if the EnableForRun bit 695 * is set in the GPE info. 696 * 697 ******************************************************************************/ 698 699 ACPI_STATUS 700 AcpiFinishGpe ( 701 ACPI_HANDLE GpeDevice, 702 UINT32 GpeNumber) 703 { 704 ACPI_GPE_EVENT_INFO *GpeEventInfo; 705 ACPI_STATUS Status; 706 ACPI_CPU_FLAGS Flags; 707 708 709 ACPI_FUNCTION_TRACE (AcpiFinishGpe); 710 711 712 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 713 714 /* Ensure that we have a valid GPE number */ 715 716 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber); 717 if (!GpeEventInfo) 718 { 719 Status = AE_BAD_PARAMETER; 720 goto UnlockAndExit; 721 } 722 723 Status = AcpiEvFinishGpe (GpeEventInfo); 724 725 UnlockAndExit: 726 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 727 return_ACPI_STATUS (Status); 728 } 729 730 ACPI_EXPORT_SYMBOL (AcpiFinishGpe) 731 732 733 /****************************************************************************** 734 * 735 * FUNCTION: AcpiDisableAllGpes 736 * 737 * PARAMETERS: None 738 * 739 * RETURN: Status 740 * 741 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks 742 * 743 ******************************************************************************/ 744 745 ACPI_STATUS 746 AcpiDisableAllGpes ( 747 void) 748 { 749 ACPI_STATUS Status; 750 751 752 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes); 753 754 755 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 756 if (ACPI_FAILURE (Status)) 757 { 758 return_ACPI_STATUS (Status); 759 } 760 761 Status = AcpiHwDisableAllGpes (); 762 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 763 764 return_ACPI_STATUS (Status); 765 } 766 767 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes) 768 769 770 /****************************************************************************** 771 * 772 * FUNCTION: AcpiEnableAllRuntimeGpes 773 * 774 * PARAMETERS: None 775 * 776 * RETURN: Status 777 * 778 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks 779 * 780 ******************************************************************************/ 781 782 ACPI_STATUS 783 AcpiEnableAllRuntimeGpes ( 784 void) 785 { 786 ACPI_STATUS Status; 787 788 789 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes); 790 791 792 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS); 793 if (ACPI_FAILURE (Status)) 794 { 795 return_ACPI_STATUS (Status); 796 } 797 798 Status = AcpiHwEnableAllRuntimeGpes (); 799 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS); 800 801 return_ACPI_STATUS (Status); 802 } 803 804 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes) 805 806 807 /******************************************************************************* 808 * 809 * FUNCTION: AcpiInstallGpeBlock 810 * 811 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device 812 * GpeBlockAddress - Address and SpaceID 813 * RegisterCount - Number of GPE register pairs in the block 814 * InterruptNumber - H/W interrupt for the block 815 * 816 * RETURN: Status 817 * 818 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not 819 * enabled here. 820 * 821 ******************************************************************************/ 822 823 ACPI_STATUS 824 AcpiInstallGpeBlock ( 825 ACPI_HANDLE GpeDevice, 826 ACPI_GENERIC_ADDRESS *GpeBlockAddress, 827 UINT32 RegisterCount, 828 UINT32 InterruptNumber) 829 { 830 ACPI_STATUS Status; 831 ACPI_OPERAND_OBJECT *ObjDesc; 832 ACPI_NAMESPACE_NODE *Node; 833 ACPI_GPE_BLOCK_INFO *GpeBlock; 834 835 836 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock); 837 838 839 if ((!GpeDevice) || 840 (!GpeBlockAddress) || 841 (!RegisterCount)) 842 { 843 return_ACPI_STATUS (AE_BAD_PARAMETER); 844 } 845 846 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 847 if (ACPI_FAILURE (Status)) 848 { 849 return (Status); 850 } 851 852 Node = AcpiNsValidateHandle (GpeDevice); 853 if (!Node) 854 { 855 Status = AE_BAD_PARAMETER; 856 goto UnlockAndExit; 857 } 858 859 /* 860 * For user-installed GPE Block Devices, the GpeBlockBaseNumber 861 * is always zero 862 */ 863 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount, 864 0, InterruptNumber, &GpeBlock); 865 if (ACPI_FAILURE (Status)) 866 { 867 goto UnlockAndExit; 868 } 869 870 /* Install block in the DeviceObject attached to the node */ 871 872 ObjDesc = AcpiNsGetAttachedObject (Node); 873 if (!ObjDesc) 874 { 875 /* 876 * No object, create a new one (Device nodes do not always have 877 * an attached object) 878 */ 879 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE); 880 if (!ObjDesc) 881 { 882 Status = AE_NO_MEMORY; 883 goto UnlockAndExit; 884 } 885 886 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE); 887 888 /* Remove local reference to the object */ 889 890 AcpiUtRemoveReference (ObjDesc); 891 if (ACPI_FAILURE (Status)) 892 { 893 goto UnlockAndExit; 894 } 895 } 896 897 /* Now install the GPE block in the DeviceObject */ 898 899 ObjDesc->Device.GpeBlock = GpeBlock; 900 901 902 UnlockAndExit: 903 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 904 return_ACPI_STATUS (Status); 905 } 906 907 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock) 908 909 910 /******************************************************************************* 911 * 912 * FUNCTION: AcpiRemoveGpeBlock 913 * 914 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device 915 * 916 * RETURN: Status 917 * 918 * DESCRIPTION: Remove a previously installed block of GPE registers 919 * 920 ******************************************************************************/ 921 922 ACPI_STATUS 923 AcpiRemoveGpeBlock ( 924 ACPI_HANDLE GpeDevice) 925 { 926 ACPI_OPERAND_OBJECT *ObjDesc; 927 ACPI_STATUS Status; 928 ACPI_NAMESPACE_NODE *Node; 929 930 931 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock); 932 933 934 if (!GpeDevice) 935 { 936 return_ACPI_STATUS (AE_BAD_PARAMETER); 937 } 938 939 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 940 if (ACPI_FAILURE (Status)) 941 { 942 return (Status); 943 } 944 945 Node = AcpiNsValidateHandle (GpeDevice); 946 if (!Node) 947 { 948 Status = AE_BAD_PARAMETER; 949 goto UnlockAndExit; 950 } 951 952 /* Get the DeviceObject attached to the node */ 953 954 ObjDesc = AcpiNsGetAttachedObject (Node); 955 if (!ObjDesc || 956 !ObjDesc->Device.GpeBlock) 957 { 958 return_ACPI_STATUS (AE_NULL_OBJECT); 959 } 960 961 /* Delete the GPE block (but not the DeviceObject) */ 962 963 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock); 964 if (ACPI_SUCCESS (Status)) 965 { 966 ObjDesc->Device.GpeBlock = NULL; 967 } 968 969 UnlockAndExit: 970 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 971 return_ACPI_STATUS (Status); 972 } 973 974 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock) 975 976 977 /******************************************************************************* 978 * 979 * FUNCTION: AcpiGetGpeDevice 980 * 981 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount) 982 * GpeDevice - Where the parent GPE Device is returned 983 * 984 * RETURN: Status 985 * 986 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL 987 * gpe device indicates that the gpe number is contained in one of 988 * the FADT-defined gpe blocks. Otherwise, the GPE block device. 989 * 990 ******************************************************************************/ 991 992 ACPI_STATUS 993 AcpiGetGpeDevice ( 994 UINT32 Index, 995 ACPI_HANDLE *GpeDevice) 996 { 997 ACPI_GPE_DEVICE_INFO Info; 998 ACPI_STATUS Status; 999 1000 1001 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice); 1002 1003 1004 if (!GpeDevice) 1005 { 1006 return_ACPI_STATUS (AE_BAD_PARAMETER); 1007 } 1008 1009 if (Index >= AcpiCurrentGpeCount) 1010 { 1011 return_ACPI_STATUS (AE_NOT_EXIST); 1012 } 1013 1014 /* Setup and walk the GPE list */ 1015 1016 Info.Index = Index; 1017 Info.Status = AE_NOT_EXIST; 1018 Info.GpeDevice = NULL; 1019 Info.NextBlockBaseIndex = 0; 1020 1021 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info); 1022 if (ACPI_FAILURE (Status)) 1023 { 1024 return_ACPI_STATUS (Status); 1025 } 1026 1027 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice); 1028 return_ACPI_STATUS (Info.Status); 1029 } 1030 1031 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice) 1032 1033 #endif /* !ACPI_REDUCED_HARDWARE */ 1034