1 /******************************************************************************
2 *
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2011, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44
45 #define __EVXFGPE_C__
46
47 #include "acpi.h"
48 #include "accommon.h"
49 #include "acevents.h"
50 #include "acnamesp.h"
51
52 #define _COMPONENT ACPI_EVENTS
53 ACPI_MODULE_NAME ("evxfgpe")
54
55
56 /*******************************************************************************
57 *
58 * FUNCTION: AcpiUpdateAllGpes
59 *
60 * PARAMETERS: None
61 *
62 * RETURN: Status
63 *
64 * DESCRIPTION: Complete GPE initialization and enable all GPEs that have
65 * associated _Lxx or _Exx methods and are not pointed to by any
66 * device _PRW methods (this indicates that these GPEs are
67 * generally intended for system or device wakeup. Such GPEs
68 * have to be enabled directly when the devices whose _PRW
69 * methods point to them are set up for wakeup signaling.)
70 *
71 * NOTE: Should be called after any GPEs are added to the system. Primarily,
72 * after the system _PRW methods have been run, but also after a GPE Block
73 * Device has been added or if any new GPE methods have been added via a
74 * dynamic table load.
75 *
76 ******************************************************************************/
77
78 ACPI_STATUS
79 AcpiUpdateAllGpes (
80 void)
81 {
82 ACPI_STATUS Status;
83
84
85 ACPI_FUNCTION_TRACE (AcpiUpdateGpes);
86
87
88 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
89 if (ACPI_FAILURE (Status))
90 {
91 return_ACPI_STATUS (Status);
92 }
93
94 if (AcpiGbl_AllGpesInitialized)
95 {
96 goto UnlockAndExit;
97 }
98
99 Status = AcpiEvWalkGpeList (AcpiEvInitializeGpeBlock, NULL);
100 if (ACPI_SUCCESS (Status))
101 {
102 AcpiGbl_AllGpesInitialized = TRUE;
103 }
104
105 UnlockAndExit:
106 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
107 return_ACPI_STATUS (Status);
108 }
109
110 ACPI_EXPORT_SYMBOL (AcpiUpdateAllGpes)
111
112
113 /*******************************************************************************
114 *
115 * FUNCTION: AcpiEnableGpe
116 *
117 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
118 * GpeNumber - GPE level within the GPE block
119 *
120 * RETURN: Status
121 *
122 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
123 * hardware-enabled.
124 *
125 ******************************************************************************/
126
127 ACPI_STATUS
128 AcpiEnableGpe (
129 ACPI_HANDLE GpeDevice,
130 UINT32 GpeNumber)
131 {
132 ACPI_STATUS Status = AE_BAD_PARAMETER;
133 ACPI_GPE_EVENT_INFO *GpeEventInfo;
134 ACPI_CPU_FLAGS Flags;
135
136
137 ACPI_FUNCTION_TRACE (AcpiEnableGpe);
138
139
140 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
141
142 /* Ensure that we have a valid GPE number */
143
144 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
145 if (GpeEventInfo)
146 {
147 Status = AcpiEvAddGpeReference (GpeEventInfo);
148 }
149
150 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
151 return_ACPI_STATUS (Status);
152 }
153
154 ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
155
156
157 /*******************************************************************************
158 *
159 * FUNCTION: AcpiDisableGpe
160 *
161 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
162 * GpeNumber - GPE level within the GPE block
163 *
164 * RETURN: Status
165 *
166 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
167 * removed, only then is the GPE disabled (for runtime GPEs), or
168 * the GPE mask bit disabled (for wake GPEs)
169 *
170 ******************************************************************************/
171
172 ACPI_STATUS
173 AcpiDisableGpe (
174 ACPI_HANDLE GpeDevice,
175 UINT32 GpeNumber)
176 {
177 ACPI_STATUS Status = AE_BAD_PARAMETER;
178 ACPI_GPE_EVENT_INFO *GpeEventInfo;
179 ACPI_CPU_FLAGS Flags;
180
181
182 ACPI_FUNCTION_TRACE (AcpiDisableGpe);
183
184
185 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
186
187 /* Ensure that we have a valid GPE number */
188
189 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
190 if (GpeEventInfo)
191 {
192 Status = AcpiEvRemoveGpeReference (GpeEventInfo);
193 }
194
195 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
196 return_ACPI_STATUS (Status);
197 }
198
199 ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
200
201
202 /*******************************************************************************
203 *
204 * FUNCTION: AcpiSetGpe
205 *
206 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
207 * GpeNumber - GPE level within the GPE block
208 * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
209 *
210 * RETURN: Status
211 *
212 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
213 * the reference count mechanism used in the AcpiEnableGpe and
214 * AcpiDisableGpe interfaces -- and should be used with care.
215 *
216 * Note: Typically used to disable a runtime GPE for short period of time,
217 * then re-enable it, without disturbing the existing reference counts. This
218 * is useful, for example, in the Embedded Controller (EC) driver.
219 *
220 ******************************************************************************/
221
222 ACPI_STATUS
223 AcpiSetGpe (
224 ACPI_HANDLE GpeDevice,
225 UINT32 GpeNumber,
226 UINT8 Action)
227 {
228 ACPI_GPE_EVENT_INFO *GpeEventInfo;
229 ACPI_STATUS Status;
230 ACPI_CPU_FLAGS Flags;
231
232
233 ACPI_FUNCTION_TRACE (AcpiSetGpe);
234
235
236 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
237
238 /* Ensure that we have a valid GPE number */
239
240 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
241 if (!GpeEventInfo)
242 {
243 Status = AE_BAD_PARAMETER;
244 goto UnlockAndExit;
245 }
246
247 /* Perform the action */
248
249 switch (Action)
250 {
251 case ACPI_GPE_ENABLE:
252 Status = AcpiEvEnableGpe (GpeEventInfo);
253 break;
254
255 case ACPI_GPE_DISABLE:
256 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
257 break;
258
259 default:
260 Status = AE_BAD_PARAMETER;
261 break;
262 }
263
264 UnlockAndExit:
265 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
266 return_ACPI_STATUS (Status);
267 }
268
269 ACPI_EXPORT_SYMBOL (AcpiSetGpe)
270
271
272 /*******************************************************************************
273 *
274 * FUNCTION: AcpiSetupGpeForWake
275 *
276 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
277 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
278 * GpeNumber - GPE level within the GPE block
279 *
280 * RETURN: Status
281 *
282 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
283 * interface is intended to be used as the host executes the
284 * _PRW methods (Power Resources for Wake) in the system tables.
285 * Each _PRW appears under a Device Object (The WakeDevice), and
286 * contains the info for the wake GPE associated with the
287 * WakeDevice.
288 *
289 ******************************************************************************/
290
291 ACPI_STATUS
292 AcpiSetupGpeForWake (
293 ACPI_HANDLE WakeDevice,
294 ACPI_HANDLE GpeDevice,
295 UINT32 GpeNumber)
296 {
297 ACPI_STATUS Status = AE_BAD_PARAMETER;
298 ACPI_GPE_EVENT_INFO *GpeEventInfo;
299 ACPI_NAMESPACE_NODE *DeviceNode;
300 ACPI_CPU_FLAGS Flags;
301
302
303 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
304
305
306 /* Parameter Validation */
307
308 if (!WakeDevice)
309 {
310 /*
311 * By forcing WakeDevice to be valid, we automatically enable the
312 * implicit notify feature on all hosts.
313 */
314 return_ACPI_STATUS (AE_BAD_PARAMETER);
315 }
316
317 /* Handle root object case */
318
319 if (WakeDevice == ACPI_ROOT_OBJECT)
320 {
321 DeviceNode = AcpiGbl_RootNode;
322 }
323 else
324 {
325 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
326 }
327
328 /* Validate WakeDevice is of type Device */
329
330 if (DeviceNode->Type != ACPI_TYPE_DEVICE)
331 {
332 return_ACPI_STATUS (AE_BAD_PARAMETER);
333 }
334
335 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
336
337 /* Ensure that we have a valid GPE number */
338
339 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
340 if (GpeEventInfo)
341 {
342 /*
343 * If there is no method or handler for this GPE, then the
344 * WakeDevice will be notified whenever this GPE fires (aka
345 * "implicit notify") Note: The GPE is assumed to be
346 * level-triggered (for windows compatibility).
347 */
348 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
349 ACPI_GPE_DISPATCH_NONE)
350 {
351 GpeEventInfo->Flags =
352 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
353 GpeEventInfo->Dispatch.DeviceNode = DeviceNode;
354 }
355
356 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
357 Status = AE_OK;
358 }
359
360 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
361 return_ACPI_STATUS (Status);
362 }
363
364 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
365
366
367 /*******************************************************************************
368 *
369 * FUNCTION: AcpiSetGpeWakeMask
370 *
371 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
372 * GpeNumber - GPE level within the GPE block
373 * Action - Enable or Disable
374 *
375 * RETURN: Status
376 *
377 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
378 * already be marked as a WAKE GPE.
379 *
380 ******************************************************************************/
381
382 ACPI_STATUS
383 AcpiSetGpeWakeMask (
384 ACPI_HANDLE GpeDevice,
385 UINT32 GpeNumber,
386 UINT8 Action)
387 {
388 ACPI_STATUS Status = AE_OK;
389 ACPI_GPE_EVENT_INFO *GpeEventInfo;
390 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
391 ACPI_CPU_FLAGS Flags;
392 UINT32 RegisterBit;
393
394
395 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
396
397
398 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
399
400 /*
401 * Ensure that we have a valid GPE number and that this GPE is in
402 * fact a wake GPE
403 */
404 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
405 if (!GpeEventInfo)
406 {
407 Status = AE_BAD_PARAMETER;
408 goto UnlockAndExit;
409 }
410
411 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
412 {
413 Status = AE_TYPE;
414 goto UnlockAndExit;
415 }
416
417 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
418 if (!GpeRegisterInfo)
419 {
420 Status = AE_NOT_EXIST;
421 goto UnlockAndExit;
422 }
423
424 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
425
426 /* Perform the action */
427
428 switch (Action)
429 {
430 case ACPI_GPE_ENABLE:
431 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
432 break;
433
434 case ACPI_GPE_DISABLE:
435 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
436 break;
437
438 default:
439 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
440 Status = AE_BAD_PARAMETER;
441 break;
442 }
443
444 UnlockAndExit:
445 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
446 return_ACPI_STATUS (Status);
447 }
448
449 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
450
451
452 /*******************************************************************************
453 *
454 * FUNCTION: AcpiClearGpe
455 *
456 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
457 * GpeNumber - GPE level within the GPE block
458 *
459 * RETURN: Status
460 *
461 * DESCRIPTION: Clear an ACPI event (general purpose)
462 *
463 ******************************************************************************/
464
465 ACPI_STATUS
466 AcpiClearGpe (
467 ACPI_HANDLE GpeDevice,
468 UINT32 GpeNumber)
469 {
470 ACPI_STATUS Status = AE_OK;
471 ACPI_GPE_EVENT_INFO *GpeEventInfo;
472 ACPI_CPU_FLAGS Flags;
473
474
475 ACPI_FUNCTION_TRACE (AcpiClearGpe);
476
477
478 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
479
480 /* Ensure that we have a valid GPE number */
481
482 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
483 if (!GpeEventInfo)
484 {
485 Status = AE_BAD_PARAMETER;
486 goto UnlockAndExit;
487 }
488
489 Status = AcpiHwClearGpe (GpeEventInfo);
490
491 UnlockAndExit:
492 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
493 return_ACPI_STATUS (Status);
494 }
495
496 ACPI_EXPORT_SYMBOL (AcpiClearGpe)
497
498
499 /*******************************************************************************
500 *
501 * FUNCTION: AcpiGetGpeStatus
502 *
503 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
504 * GpeNumber - GPE level within the GPE block
505 * EventStatus - Where the current status of the event
506 * will be returned
507 *
508 * RETURN: Status
509 *
510 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
511 *
512 ******************************************************************************/
513
514 ACPI_STATUS
515 AcpiGetGpeStatus (
516 ACPI_HANDLE GpeDevice,
517 UINT32 GpeNumber,
518 ACPI_EVENT_STATUS *EventStatus)
519 {
520 ACPI_STATUS Status = AE_OK;
521 ACPI_GPE_EVENT_INFO *GpeEventInfo;
522 ACPI_CPU_FLAGS Flags;
523
524
525 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
526
527
528 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
529
530 /* Ensure that we have a valid GPE number */
531
532 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
533 if (!GpeEventInfo)
534 {
535 Status = AE_BAD_PARAMETER;
536 goto UnlockAndExit;
537 }
538
539 /* Obtain status on the requested GPE number */
540
541 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
542
543 UnlockAndExit:
544 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
545 return_ACPI_STATUS (Status);
546 }
547
548 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
549
550
551 /*******************************************************************************
552 *
553 * FUNCTION: AcpiFinishGpe
554 *
555 * PARAMETERS: GpeDevice - Namespace node for the GPE Block
556 * (NULL for FADT defined GPEs)
557 * GpeNumber - GPE level within the GPE block
558 *
559 * RETURN: Status
560 *
561 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
562 * processing. Intended for use by asynchronous host-installed
563 * GPE handlers. The GPE is only reenabled if the EnableForRun bit
564 * is set in the GPE info.
565 *
566 ******************************************************************************/
567
568 ACPI_STATUS
569 AcpiFinishGpe (
570 ACPI_HANDLE GpeDevice,
571 UINT32 GpeNumber)
572 {
573 ACPI_GPE_EVENT_INFO *GpeEventInfo;
574 ACPI_STATUS Status;
575 ACPI_CPU_FLAGS Flags;
576
577
578 ACPI_FUNCTION_TRACE (AcpiFinishGpe);
579
580
581 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
582
583 /* Ensure that we have a valid GPE number */
584
585 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
586 if (!GpeEventInfo)
587 {
588 Status = AE_BAD_PARAMETER;
589 goto UnlockAndExit;
590 }
591
592 Status = AcpiEvFinishGpe (GpeEventInfo);
593
594 UnlockAndExit:
595 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
596 return_ACPI_STATUS (Status);
597 }
598
599 ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
600
601
602 /******************************************************************************
603 *
604 * FUNCTION: AcpiDisableAllGpes
605 *
606 * PARAMETERS: None
607 *
608 * RETURN: Status
609 *
610 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
611 *
612 ******************************************************************************/
613
614 ACPI_STATUS
615 AcpiDisableAllGpes (
616 void)
617 {
618 ACPI_STATUS Status;
619
620
621 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
622
623
624 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
625 if (ACPI_FAILURE (Status))
626 {
627 return_ACPI_STATUS (Status);
628 }
629
630 Status = AcpiHwDisableAllGpes ();
631 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
632
633 return_ACPI_STATUS (Status);
634 }
635
636 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
637
638
639 /******************************************************************************
640 *
641 * FUNCTION: AcpiEnableAllRuntimeGpes
642 *
643 * PARAMETERS: None
644 *
645 * RETURN: Status
646 *
647 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
648 *
649 ******************************************************************************/
650
651 ACPI_STATUS
652 AcpiEnableAllRuntimeGpes (
653 void)
654 {
655 ACPI_STATUS Status;
656
657
658 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
659
660
661 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
662 if (ACPI_FAILURE (Status))
663 {
664 return_ACPI_STATUS (Status);
665 }
666
667 Status = AcpiHwEnableAllRuntimeGpes ();
668 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
669
670 return_ACPI_STATUS (Status);
671 }
672
673 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
674
675
676 /*******************************************************************************
677 *
678 * FUNCTION: AcpiInstallGpeBlock
679 *
680 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
681 * GpeBlockAddress - Address and SpaceID
682 * RegisterCount - Number of GPE register pairs in the block
683 * InterruptNumber - H/W interrupt for the block
684 *
685 * RETURN: Status
686 *
687 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
688 * enabled here.
689 *
690 ******************************************************************************/
691
692 ACPI_STATUS
693 AcpiInstallGpeBlock (
694 ACPI_HANDLE GpeDevice,
695 ACPI_GENERIC_ADDRESS *GpeBlockAddress,
696 UINT32 RegisterCount,
697 UINT32 InterruptNumber)
698 {
699 ACPI_STATUS Status;
700 ACPI_OPERAND_OBJECT *ObjDesc;
701 ACPI_NAMESPACE_NODE *Node;
702 ACPI_GPE_BLOCK_INFO *GpeBlock;
703
704
705 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
706
707
708 if ((!GpeDevice) ||
709 (!GpeBlockAddress) ||
710 (!RegisterCount))
711 {
712 return_ACPI_STATUS (AE_BAD_PARAMETER);
713 }
714
715 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
716 if (ACPI_FAILURE (Status))
717 {
718 return (Status);
719 }
720
721 Node = AcpiNsValidateHandle (GpeDevice);
722 if (!Node)
723 {
724 Status = AE_BAD_PARAMETER;
725 goto UnlockAndExit;
726 }
727
728 /*
729 * For user-installed GPE Block Devices, the GpeBlockBaseNumber
730 * is always zero
731 */
732 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress, RegisterCount,
733 0, InterruptNumber, &GpeBlock);
734 if (ACPI_FAILURE (Status))
735 {
736 goto UnlockAndExit;
737 }
738
739 /* Install block in the DeviceObject attached to the node */
740
741 ObjDesc = AcpiNsGetAttachedObject (Node);
742 if (!ObjDesc)
743 {
744 /*
745 * No object, create a new one (Device nodes do not always have
746 * an attached object)
747 */
748 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
749 if (!ObjDesc)
750 {
751 Status = AE_NO_MEMORY;
752 goto UnlockAndExit;
753 }
754
755 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
756
757 /* Remove local reference to the object */
758
759 AcpiUtRemoveReference (ObjDesc);
760 if (ACPI_FAILURE (Status))
761 {
762 goto UnlockAndExit;
763 }
764 }
765
766 /* Now install the GPE block in the DeviceObject */
767
768 ObjDesc->Device.GpeBlock = GpeBlock;
769
770
771 UnlockAndExit:
772 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
773 return_ACPI_STATUS (Status);
774 }
775
776 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
777
778
779 /*******************************************************************************
780 *
781 * FUNCTION: AcpiRemoveGpeBlock
782 *
783 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
784 *
785 * RETURN: Status
786 *
787 * DESCRIPTION: Remove a previously installed block of GPE registers
788 *
789 ******************************************************************************/
790
791 ACPI_STATUS
792 AcpiRemoveGpeBlock (
793 ACPI_HANDLE GpeDevice)
794 {
795 ACPI_OPERAND_OBJECT *ObjDesc;
796 ACPI_STATUS Status;
797 ACPI_NAMESPACE_NODE *Node;
798
799
800 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
801
802
803 if (!GpeDevice)
804 {
805 return_ACPI_STATUS (AE_BAD_PARAMETER);
806 }
807
808 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
809 if (ACPI_FAILURE (Status))
810 {
811 return (Status);
812 }
813
814 Node = AcpiNsValidateHandle (GpeDevice);
815 if (!Node)
816 {
817 Status = AE_BAD_PARAMETER;
818 goto UnlockAndExit;
819 }
820
821 /* Get the DeviceObject attached to the node */
822
823 ObjDesc = AcpiNsGetAttachedObject (Node);
824 if (!ObjDesc ||
825 !ObjDesc->Device.GpeBlock)
826 {
827 return_ACPI_STATUS (AE_NULL_OBJECT);
828 }
829
830 /* Delete the GPE block (but not the DeviceObject) */
831
832 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
833 if (ACPI_SUCCESS (Status))
834 {
835 ObjDesc->Device.GpeBlock = NULL;
836 }
837
838 UnlockAndExit:
839 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
840 return_ACPI_STATUS (Status);
841 }
842
843 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
844
845
846 /*******************************************************************************
847 *
848 * FUNCTION: AcpiGetGpeDevice
849 *
850 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
851 * GpeDevice - Where the parent GPE Device is returned
852 *
853 * RETURN: Status
854 *
855 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
856 * gpe device indicates that the gpe number is contained in one of
857 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
858 *
859 ******************************************************************************/
860
861 ACPI_STATUS
862 AcpiGetGpeDevice (
863 UINT32 Index,
864 ACPI_HANDLE *GpeDevice)
865 {
866 ACPI_GPE_DEVICE_INFO Info;
867 ACPI_STATUS Status;
868
869
870 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
871
872
873 if (!GpeDevice)
874 {
875 return_ACPI_STATUS (AE_BAD_PARAMETER);
876 }
877
878 if (Index >= AcpiCurrentGpeCount)
879 {
880 return_ACPI_STATUS (AE_NOT_EXIST);
881 }
882
883 /* Setup and walk the GPE list */
884
885 Info.Index = Index;
886 Info.Status = AE_NOT_EXIST;
887 Info.GpeDevice = NULL;
888 Info.NextBlockBaseIndex = 0;
889
890 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
891 if (ACPI_FAILURE (Status))
892 {
893 return_ACPI_STATUS (Status);
894 }
895
896 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
897 return_ACPI_STATUS (Info.Status);
898 }
899
900 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)