1 /******************************************************************************
2 *
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2016, 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 #define EXPORT_ACPI_INTERFACES
45
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acevents.h"
49 #include "acnamesp.h"
50
51 #define _COMPONENT ACPI_EVENTS
52 ACPI_MODULE_NAME ("evxfgpe")
53
54
55 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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
AcpiUpdateAllGpes(void)79 AcpiUpdateAllGpes (
80 void)
81 {
82 ACPI_STATUS Status;
83
84
85 ACPI_FUNCTION_TRACE (AcpiUpdateAllGpes);
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
ACPI_EXPORT_SYMBOL(AcpiUpdateAllGpes)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 /*
143 * Ensure that we have a valid GPE number and that there is some way
144 * of handling the GPE (handler or a GPE method). In other words, we
145 * won't allow a valid GPE to be enabled if there is no way to handle it.
146 */
147 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
148 if (GpeEventInfo)
149 {
150 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) !=
151 ACPI_GPE_DISPATCH_NONE)
152 {
153 Status = AcpiEvAddGpeReference (GpeEventInfo);
154 }
155 else
156 {
157 Status = AE_NO_HANDLER;
158 }
159 }
160
161 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
162 return_ACPI_STATUS (Status);
163 }
164
ACPI_EXPORT_SYMBOL(AcpiEnableGpe)165 ACPI_EXPORT_SYMBOL (AcpiEnableGpe)
166
167
168 /*******************************************************************************
169 *
170 * FUNCTION: AcpiDisableGpe
171 *
172 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
173 * GpeNumber - GPE level within the GPE block
174 *
175 * RETURN: Status
176 *
177 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
178 * removed, only then is the GPE disabled (for runtime GPEs), or
179 * the GPE mask bit disabled (for wake GPEs)
180 *
181 ******************************************************************************/
182
183 ACPI_STATUS
184 AcpiDisableGpe (
185 ACPI_HANDLE GpeDevice,
186 UINT32 GpeNumber)
187 {
188 ACPI_STATUS Status = AE_BAD_PARAMETER;
189 ACPI_GPE_EVENT_INFO *GpeEventInfo;
190 ACPI_CPU_FLAGS Flags;
191
192
193 ACPI_FUNCTION_TRACE (AcpiDisableGpe);
194
195
196 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
197
198 /* Ensure that we have a valid GPE number */
199
200 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
201 if (GpeEventInfo)
202 {
203 Status = AcpiEvRemoveGpeReference (GpeEventInfo);
204 }
205
206 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
207 return_ACPI_STATUS (Status);
208 }
209
ACPI_EXPORT_SYMBOL(AcpiDisableGpe)210 ACPI_EXPORT_SYMBOL (AcpiDisableGpe)
211
212
213 /*******************************************************************************
214 *
215 * FUNCTION: AcpiSetGpe
216 *
217 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
218 * GpeNumber - GPE level within the GPE block
219 * Action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
220 *
221 * RETURN: Status
222 *
223 * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
224 * the reference count mechanism used in the AcpiEnableGpe(),
225 * AcpiDisableGpe() interfaces.
226 * This API is typically used by the GPE raw handler mode driver
227 * to switch between the polling mode and the interrupt mode after
228 * the driver has enabled the GPE.
229 * The APIs should be invoked in this order:
230 * AcpiEnableGpe() <- Ensure the reference count > 0
231 * AcpiSetGpe(ACPI_GPE_DISABLE) <- Enter polling mode
232 * AcpiSetGpe(ACPI_GPE_ENABLE) <- Leave polling mode
233 * AcpiDisableGpe() <- Decrease the reference count
234 *
235 * Note: If a GPE is shared by 2 silicon components, then both the drivers
236 * should support GPE polling mode or disabling the GPE for long period
237 * for one driver may break the other. So use it with care since all
238 * firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode.
239 *
240 ******************************************************************************/
241
242 ACPI_STATUS
243 AcpiSetGpe (
244 ACPI_HANDLE GpeDevice,
245 UINT32 GpeNumber,
246 UINT8 Action)
247 {
248 ACPI_GPE_EVENT_INFO *GpeEventInfo;
249 ACPI_STATUS Status;
250 ACPI_CPU_FLAGS Flags;
251
252
253 ACPI_FUNCTION_TRACE (AcpiSetGpe);
254
255
256 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
257
258 /* Ensure that we have a valid GPE number */
259
260 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
261 if (!GpeEventInfo)
262 {
263 Status = AE_BAD_PARAMETER;
264 goto UnlockAndExit;
265 }
266
267 /* Perform the action */
268
269 switch (Action)
270 {
271 case ACPI_GPE_ENABLE:
272
273 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
274 break;
275
276 case ACPI_GPE_DISABLE:
277
278 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
279 break;
280
281 default:
282
283 Status = AE_BAD_PARAMETER;
284 break;
285 }
286
287 UnlockAndExit:
288 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
289 return_ACPI_STATUS (Status);
290 }
291
ACPI_EXPORT_SYMBOL(AcpiSetGpe)292 ACPI_EXPORT_SYMBOL (AcpiSetGpe)
293
294
295 /*******************************************************************************
296 *
297 * FUNCTION: AcpiMarkGpeForWake
298 *
299 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
300 * GpeNumber - GPE level within the GPE block
301 *
302 * RETURN: Status
303 *
304 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
305 * sets the ACPI_GPE_CAN_WAKE flag.
306 *
307 * Some potential callers of AcpiSetupGpeForWake may know in advance that
308 * there won't be any notify handlers installed for device wake notifications
309 * from the given GPE (one example is a button GPE in Linux). For these cases,
310 * AcpiMarkGpeForWake should be used instead of AcpiSetupGpeForWake.
311 * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
312 * setup implicit wake notification for it (since there's no handler method).
313 *
314 ******************************************************************************/
315
316 ACPI_STATUS
317 AcpiMarkGpeForWake (
318 ACPI_HANDLE GpeDevice,
319 UINT32 GpeNumber)
320 {
321 ACPI_GPE_EVENT_INFO *GpeEventInfo;
322 ACPI_STATUS Status = AE_BAD_PARAMETER;
323 ACPI_CPU_FLAGS Flags;
324
325
326 ACPI_FUNCTION_TRACE (AcpiMarkGpeForWake);
327
328
329 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
330
331 /* Ensure that we have a valid GPE number */
332
333 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
334 if (GpeEventInfo)
335 {
336 /* Mark the GPE as a possible wake event */
337
338 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
339 Status = AE_OK;
340 }
341
342 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
343 return_ACPI_STATUS (Status);
344 }
345
ACPI_EXPORT_SYMBOL(AcpiMarkGpeForWake)346 ACPI_EXPORT_SYMBOL (AcpiMarkGpeForWake)
347
348
349 /*******************************************************************************
350 *
351 * FUNCTION: AcpiSetupGpeForWake
352 *
353 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
354 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
355 * GpeNumber - GPE level within the GPE block
356 *
357 * RETURN: Status
358 *
359 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
360 * interface is intended to be used as the host executes the
361 * _PRW methods (Power Resources for Wake) in the system tables.
362 * Each _PRW appears under a Device Object (The WakeDevice), and
363 * contains the info for the wake GPE associated with the
364 * WakeDevice.
365 *
366 ******************************************************************************/
367
368 ACPI_STATUS
369 AcpiSetupGpeForWake (
370 ACPI_HANDLE WakeDevice,
371 ACPI_HANDLE GpeDevice,
372 UINT32 GpeNumber)
373 {
374 ACPI_STATUS Status;
375 ACPI_GPE_EVENT_INFO *GpeEventInfo;
376 ACPI_NAMESPACE_NODE *DeviceNode;
377 ACPI_GPE_NOTIFY_INFO *Notify;
378 ACPI_GPE_NOTIFY_INFO *NewNotify;
379 ACPI_CPU_FLAGS Flags;
380
381
382 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
383
384
385 /* Parameter Validation */
386
387 if (!WakeDevice)
388 {
389 /*
390 * By forcing WakeDevice to be valid, we automatically enable the
391 * implicit notify feature on all hosts.
392 */
393 return_ACPI_STATUS (AE_BAD_PARAMETER);
394 }
395
396 /* Handle root object case */
397
398 if (WakeDevice == ACPI_ROOT_OBJECT)
399 {
400 DeviceNode = AcpiGbl_RootNode;
401 }
402 else
403 {
404 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
405 }
406
407 /* Validate WakeDevice is of type Device */
408
409 if (DeviceNode->Type != ACPI_TYPE_DEVICE)
410 {
411 return_ACPI_STATUS (AE_BAD_PARAMETER);
412 }
413
414 /*
415 * Allocate a new notify object up front, in case it is needed.
416 * Memory allocation while holding a spinlock is a big no-no
417 * on some hosts.
418 */
419 NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
420 if (!NewNotify)
421 {
422 return_ACPI_STATUS (AE_NO_MEMORY);
423 }
424
425 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
426
427 /* Ensure that we have a valid GPE number */
428
429 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
430 if (!GpeEventInfo)
431 {
432 Status = AE_BAD_PARAMETER;
433 goto UnlockAndExit;
434 }
435
436 /*
437 * If there is no method or handler for this GPE, then the
438 * WakeDevice will be notified whenever this GPE fires. This is
439 * known as an "implicit notify". Note: The GPE is assumed to be
440 * level-triggered (for windows compatibility).
441 */
442 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
443 ACPI_GPE_DISPATCH_NONE)
444 {
445 /*
446 * This is the first device for implicit notify on this GPE.
447 * Just set the flags here, and enter the NOTIFY block below.
448 */
449 GpeEventInfo->Flags =
450 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
451 }
452
453 /*
454 * If we already have an implicit notify on this GPE, add
455 * this device to the notify list.
456 */
457 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
458 ACPI_GPE_DISPATCH_NOTIFY)
459 {
460 /* Ensure that the device is not already in the list */
461
462 Notify = GpeEventInfo->Dispatch.NotifyList;
463 while (Notify)
464 {
465 if (Notify->DeviceNode == DeviceNode)
466 {
467 Status = AE_ALREADY_EXISTS;
468 goto UnlockAndExit;
469 }
470 Notify = Notify->Next;
471 }
472
473 /* Add this device to the notify list for this GPE */
474
475 NewNotify->DeviceNode = DeviceNode;
476 NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
477 GpeEventInfo->Dispatch.NotifyList = NewNotify;
478 NewNotify = NULL;
479 }
480
481 /* Mark the GPE as a possible wake event */
482
483 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
484 Status = AE_OK;
485
486
487 UnlockAndExit:
488 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
489
490 /* Delete the notify object if it was not used above */
491
492 if (NewNotify)
493 {
494 ACPI_FREE (NewNotify);
495 }
496 return_ACPI_STATUS (Status);
497 }
498
ACPI_EXPORT_SYMBOL(AcpiSetupGpeForWake)499 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
500
501
502 /*******************************************************************************
503 *
504 * FUNCTION: AcpiSetGpeWakeMask
505 *
506 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
507 * GpeNumber - GPE level within the GPE block
508 * Action - Enable or Disable
509 *
510 * RETURN: Status
511 *
512 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
513 * already be marked as a WAKE GPE.
514 *
515 ******************************************************************************/
516
517 ACPI_STATUS
518 AcpiSetGpeWakeMask (
519 ACPI_HANDLE GpeDevice,
520 UINT32 GpeNumber,
521 UINT8 Action)
522 {
523 ACPI_STATUS Status = AE_OK;
524 ACPI_GPE_EVENT_INFO *GpeEventInfo;
525 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
526 ACPI_CPU_FLAGS Flags;
527 UINT32 RegisterBit;
528
529
530 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
531
532
533 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
534
535 /*
536 * Ensure that we have a valid GPE number and that this GPE is in
537 * fact a wake GPE
538 */
539 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
540 if (!GpeEventInfo)
541 {
542 Status = AE_BAD_PARAMETER;
543 goto UnlockAndExit;
544 }
545
546 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
547 {
548 Status = AE_TYPE;
549 goto UnlockAndExit;
550 }
551
552 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
553 if (!GpeRegisterInfo)
554 {
555 Status = AE_NOT_EXIST;
556 goto UnlockAndExit;
557 }
558
559 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
560
561 /* Perform the action */
562
563 switch (Action)
564 {
565 case ACPI_GPE_ENABLE:
566
567 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
568 break;
569
570 case ACPI_GPE_DISABLE:
571
572 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
573 break;
574
575 default:
576
577 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
578 Status = AE_BAD_PARAMETER;
579 break;
580 }
581
582 UnlockAndExit:
583 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
584 return_ACPI_STATUS (Status);
585 }
586
ACPI_EXPORT_SYMBOL(AcpiSetGpeWakeMask)587 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
588
589
590 /*******************************************************************************
591 *
592 * FUNCTION: AcpiClearGpe
593 *
594 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
595 * GpeNumber - GPE level within the GPE block
596 *
597 * RETURN: Status
598 *
599 * DESCRIPTION: Clear an ACPI event (general purpose)
600 *
601 ******************************************************************************/
602
603 ACPI_STATUS
604 AcpiClearGpe (
605 ACPI_HANDLE GpeDevice,
606 UINT32 GpeNumber)
607 {
608 ACPI_STATUS Status = AE_OK;
609 ACPI_GPE_EVENT_INFO *GpeEventInfo;
610 ACPI_CPU_FLAGS Flags;
611
612
613 ACPI_FUNCTION_TRACE (AcpiClearGpe);
614
615
616 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
617
618 /* Ensure that we have a valid GPE number */
619
620 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
621 if (!GpeEventInfo)
622 {
623 Status = AE_BAD_PARAMETER;
624 goto UnlockAndExit;
625 }
626
627 Status = AcpiHwClearGpe (GpeEventInfo);
628
629 UnlockAndExit:
630 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
631 return_ACPI_STATUS (Status);
632 }
633
ACPI_EXPORT_SYMBOL(AcpiClearGpe)634 ACPI_EXPORT_SYMBOL (AcpiClearGpe)
635
636
637 /*******************************************************************************
638 *
639 * FUNCTION: AcpiGetGpeStatus
640 *
641 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
642 * GpeNumber - GPE level within the GPE block
643 * EventStatus - Where the current status of the event
644 * will be returned
645 *
646 * RETURN: Status
647 *
648 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
649 *
650 ******************************************************************************/
651
652 ACPI_STATUS
653 AcpiGetGpeStatus (
654 ACPI_HANDLE GpeDevice,
655 UINT32 GpeNumber,
656 ACPI_EVENT_STATUS *EventStatus)
657 {
658 ACPI_STATUS Status = AE_OK;
659 ACPI_GPE_EVENT_INFO *GpeEventInfo;
660 ACPI_CPU_FLAGS Flags;
661
662
663 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
664
665
666 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
667
668 /* Ensure that we have a valid GPE number */
669
670 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
671 if (!GpeEventInfo)
672 {
673 Status = AE_BAD_PARAMETER;
674 goto UnlockAndExit;
675 }
676
677 /* Obtain status on the requested GPE number */
678
679 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
680
681 UnlockAndExit:
682 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
683 return_ACPI_STATUS (Status);
684 }
685
ACPI_EXPORT_SYMBOL(AcpiGetGpeStatus)686 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
687
688
689 /*******************************************************************************
690 *
691 * FUNCTION: AcpiFinishGpe
692 *
693 * PARAMETERS: GpeDevice - Namespace node for the GPE Block
694 * (NULL for FADT defined GPEs)
695 * GpeNumber - GPE level within the GPE block
696 *
697 * RETURN: Status
698 *
699 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
700 * processing. Intended for use by asynchronous host-installed
701 * GPE handlers. The GPE is only reenabled if the EnableForRun bit
702 * is set in the GPE info.
703 *
704 ******************************************************************************/
705
706 ACPI_STATUS
707 AcpiFinishGpe (
708 ACPI_HANDLE GpeDevice,
709 UINT32 GpeNumber)
710 {
711 ACPI_GPE_EVENT_INFO *GpeEventInfo;
712 ACPI_STATUS Status;
713 ACPI_CPU_FLAGS Flags;
714
715
716 ACPI_FUNCTION_TRACE (AcpiFinishGpe);
717
718
719 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
720
721 /* Ensure that we have a valid GPE number */
722
723 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
724 if (!GpeEventInfo)
725 {
726 Status = AE_BAD_PARAMETER;
727 goto UnlockAndExit;
728 }
729
730 Status = AcpiEvFinishGpe (GpeEventInfo);
731
732 UnlockAndExit:
733 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
734 return_ACPI_STATUS (Status);
735 }
736
ACPI_EXPORT_SYMBOL(AcpiFinishGpe)737 ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
738
739
740 /******************************************************************************
741 *
742 * FUNCTION: AcpiDisableAllGpes
743 *
744 * PARAMETERS: None
745 *
746 * RETURN: Status
747 *
748 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
749 *
750 ******************************************************************************/
751
752 ACPI_STATUS
753 AcpiDisableAllGpes (
754 void)
755 {
756 ACPI_STATUS Status;
757
758
759 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
760
761
762 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
763 if (ACPI_FAILURE (Status))
764 {
765 return_ACPI_STATUS (Status);
766 }
767
768 Status = AcpiHwDisableAllGpes ();
769 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
770
771 return_ACPI_STATUS (Status);
772 }
773
ACPI_EXPORT_SYMBOL(AcpiDisableAllGpes)774 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
775
776
777 /******************************************************************************
778 *
779 * FUNCTION: AcpiEnableAllRuntimeGpes
780 *
781 * PARAMETERS: None
782 *
783 * RETURN: Status
784 *
785 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
786 *
787 ******************************************************************************/
788
789 ACPI_STATUS
790 AcpiEnableAllRuntimeGpes (
791 void)
792 {
793 ACPI_STATUS Status;
794
795
796 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
797
798
799 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
800 if (ACPI_FAILURE (Status))
801 {
802 return_ACPI_STATUS (Status);
803 }
804
805 Status = AcpiHwEnableAllRuntimeGpes ();
806 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
807
808 return_ACPI_STATUS (Status);
809 }
810
ACPI_EXPORT_SYMBOL(AcpiEnableAllRuntimeGpes)811 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
812
813
814 /******************************************************************************
815 *
816 * FUNCTION: AcpiEnableAllWakeupGpes
817 *
818 * PARAMETERS: None
819 *
820 * RETURN: Status
821 *
822 * DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in
823 * all GPE blocks.
824 *
825 ******************************************************************************/
826
827 ACPI_STATUS
828 AcpiEnableAllWakeupGpes (
829 void)
830 {
831 ACPI_STATUS Status;
832
833
834 ACPI_FUNCTION_TRACE (AcpiEnableAllWakeupGpes);
835
836
837 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
838 if (ACPI_FAILURE (Status))
839 {
840 return_ACPI_STATUS (Status);
841 }
842
843 Status = AcpiHwEnableAllWakeupGpes ();
844 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
845
846 return_ACPI_STATUS (Status);
847 }
848
ACPI_EXPORT_SYMBOL(AcpiEnableAllWakeupGpes)849 ACPI_EXPORT_SYMBOL (AcpiEnableAllWakeupGpes)
850
851
852 /*******************************************************************************
853 *
854 * FUNCTION: AcpiInstallGpeBlock
855 *
856 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
857 * GpeBlockAddress - Address and SpaceID
858 * RegisterCount - Number of GPE register pairs in the block
859 * InterruptNumber - H/W interrupt for the block
860 *
861 * RETURN: Status
862 *
863 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
864 * enabled here.
865 *
866 ******************************************************************************/
867
868 ACPI_STATUS
869 AcpiInstallGpeBlock (
870 ACPI_HANDLE GpeDevice,
871 ACPI_GENERIC_ADDRESS *GpeBlockAddress,
872 UINT32 RegisterCount,
873 UINT32 InterruptNumber)
874 {
875 ACPI_STATUS Status;
876 ACPI_OPERAND_OBJECT *ObjDesc;
877 ACPI_NAMESPACE_NODE *Node;
878 ACPI_GPE_BLOCK_INFO *GpeBlock;
879
880
881 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
882
883
884 if ((!GpeDevice) ||
885 (!GpeBlockAddress) ||
886 (!RegisterCount))
887 {
888 return_ACPI_STATUS (AE_BAD_PARAMETER);
889 }
890
891 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
892 if (ACPI_FAILURE (Status))
893 {
894 return_ACPI_STATUS (Status);
895 }
896
897 Node = AcpiNsValidateHandle (GpeDevice);
898 if (!Node)
899 {
900 Status = AE_BAD_PARAMETER;
901 goto UnlockAndExit;
902 }
903
904 /* Validate the parent device */
905
906 if (Node->Type != ACPI_TYPE_DEVICE)
907 {
908 Status = AE_TYPE;
909 goto UnlockAndExit;
910 }
911
912 if (Node->Object)
913 {
914 Status = AE_ALREADY_EXISTS;
915 goto UnlockAndExit;
916 }
917
918 /*
919 * For user-installed GPE Block Devices, the GpeBlockBaseNumber
920 * is always zero
921 */
922 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress->Address,
923 GpeBlockAddress->SpaceId, RegisterCount,
924 0, InterruptNumber, &GpeBlock);
925 if (ACPI_FAILURE (Status))
926 {
927 goto UnlockAndExit;
928 }
929
930 /* Install block in the DeviceObject attached to the node */
931
932 ObjDesc = AcpiNsGetAttachedObject (Node);
933 if (!ObjDesc)
934 {
935 /*
936 * No object, create a new one (Device nodes do not always have
937 * an attached object)
938 */
939 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
940 if (!ObjDesc)
941 {
942 Status = AE_NO_MEMORY;
943 goto UnlockAndExit;
944 }
945
946 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
947
948 /* Remove local reference to the object */
949
950 AcpiUtRemoveReference (ObjDesc);
951 if (ACPI_FAILURE (Status))
952 {
953 goto UnlockAndExit;
954 }
955 }
956
957 /* Now install the GPE block in the DeviceObject */
958
959 ObjDesc->Device.GpeBlock = GpeBlock;
960
961
962 UnlockAndExit:
963 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
964 return_ACPI_STATUS (Status);
965 }
966
ACPI_EXPORT_SYMBOL(AcpiInstallGpeBlock)967 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
968
969
970 /*******************************************************************************
971 *
972 * FUNCTION: AcpiRemoveGpeBlock
973 *
974 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
975 *
976 * RETURN: Status
977 *
978 * DESCRIPTION: Remove a previously installed block of GPE registers
979 *
980 ******************************************************************************/
981
982 ACPI_STATUS
983 AcpiRemoveGpeBlock (
984 ACPI_HANDLE GpeDevice)
985 {
986 ACPI_OPERAND_OBJECT *ObjDesc;
987 ACPI_STATUS Status;
988 ACPI_NAMESPACE_NODE *Node;
989
990
991 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
992
993
994 if (!GpeDevice)
995 {
996 return_ACPI_STATUS (AE_BAD_PARAMETER);
997 }
998
999 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
1000 if (ACPI_FAILURE (Status))
1001 {
1002 return_ACPI_STATUS (Status);
1003 }
1004
1005 Node = AcpiNsValidateHandle (GpeDevice);
1006 if (!Node)
1007 {
1008 Status = AE_BAD_PARAMETER;
1009 goto UnlockAndExit;
1010 }
1011
1012 /* Validate the parent device */
1013
1014 if (Node->Type != ACPI_TYPE_DEVICE)
1015 {
1016 Status = AE_TYPE;
1017 goto UnlockAndExit;
1018 }
1019
1020 /* Get the DeviceObject attached to the node */
1021
1022 ObjDesc = AcpiNsGetAttachedObject (Node);
1023 if (!ObjDesc ||
1024 !ObjDesc->Device.GpeBlock)
1025 {
1026 return_ACPI_STATUS (AE_NULL_OBJECT);
1027 }
1028
1029 /* Delete the GPE block (but not the DeviceObject) */
1030
1031 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
1032 if (ACPI_SUCCESS (Status))
1033 {
1034 ObjDesc->Device.GpeBlock = NULL;
1035 }
1036
1037 UnlockAndExit:
1038 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
1039 return_ACPI_STATUS (Status);
1040 }
1041
ACPI_EXPORT_SYMBOL(AcpiRemoveGpeBlock)1042 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
1043
1044
1045 /*******************************************************************************
1046 *
1047 * FUNCTION: AcpiGetGpeDevice
1048 *
1049 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
1050 * GpeDevice - Where the parent GPE Device is returned
1051 *
1052 * RETURN: Status
1053 *
1054 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
1055 * gpe device indicates that the gpe number is contained in one of
1056 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
1057 *
1058 ******************************************************************************/
1059
1060 ACPI_STATUS
1061 AcpiGetGpeDevice (
1062 UINT32 Index,
1063 ACPI_HANDLE *GpeDevice)
1064 {
1065 ACPI_GPE_DEVICE_INFO Info;
1066 ACPI_STATUS Status;
1067
1068
1069 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
1070
1071
1072 if (!GpeDevice)
1073 {
1074 return_ACPI_STATUS (AE_BAD_PARAMETER);
1075 }
1076
1077 if (Index >= AcpiCurrentGpeCount)
1078 {
1079 return_ACPI_STATUS (AE_NOT_EXIST);
1080 }
1081
1082 /* Setup and walk the GPE list */
1083
1084 Info.Index = Index;
1085 Info.Status = AE_NOT_EXIST;
1086 Info.GpeDevice = NULL;
1087 Info.NextBlockBaseIndex = 0;
1088
1089 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
1090 if (ACPI_FAILURE (Status))
1091 {
1092 return_ACPI_STATUS (Status);
1093 }
1094
1095 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
1096 return_ACPI_STATUS (Info.Status);
1097 }
1098
1099 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
1100
1101 #endif /* !ACPI_REDUCED_HARDWARE */
1102