1 /******************************************************************************
2 *
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) !=
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 and
225 * AcpiDisableGpe interfaces -- and should be used with care.
226 *
227 * Note: Typically used to disable a runtime GPE for short period of time,
228 * then re-enable it, without disturbing the existing reference counts. This
229 * is useful, for example, in the Embedded Controller (EC) driver.
230 *
231 ******************************************************************************/
232
233 ACPI_STATUS
234 AcpiSetGpe (
235 ACPI_HANDLE GpeDevice,
236 UINT32 GpeNumber,
237 UINT8 Action)
238 {
239 ACPI_GPE_EVENT_INFO *GpeEventInfo;
240 ACPI_STATUS Status;
241 ACPI_CPU_FLAGS Flags;
242
243
244 ACPI_FUNCTION_TRACE (AcpiSetGpe);
245
246
247 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
248
249 /* Ensure that we have a valid GPE number */
250
251 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
252 if (!GpeEventInfo)
253 {
254 Status = AE_BAD_PARAMETER;
255 goto UnlockAndExit;
256 }
257
258 /* Perform the action */
259
260 switch (Action)
261 {
262 case ACPI_GPE_ENABLE:
263
264 Status = AcpiEvEnableGpe (GpeEventInfo);
265 break;
266
267 case ACPI_GPE_DISABLE:
268
269 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
270 break;
271
272 default:
273
274 Status = AE_BAD_PARAMETER;
275 break;
276 }
277
278 UnlockAndExit:
279 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
280 return_ACPI_STATUS (Status);
281 }
282
ACPI_EXPORT_SYMBOL(AcpiSetGpe)283 ACPI_EXPORT_SYMBOL (AcpiSetGpe)
284
285
286 /*******************************************************************************
287 *
288 * FUNCTION: AcpiMarkGpeForWake
289 *
290 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
291 * GpeNumber - GPE level within the GPE block
292 *
293 * RETURN: Status
294 *
295 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
296 * sets the ACPI_GPE_CAN_WAKE flag.
297 *
298 * Some potential callers of AcpiSetupGpeForWake may know in advance that
299 * there won't be any notify handlers installed for device wake notifications
300 * from the given GPE (one example is a button GPE in Linux). For these cases,
301 * AcpiMarkGpeForWake should be used instead of AcpiSetupGpeForWake.
302 * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
303 * setup implicit wake notification for it (since there's no handler method).
304 *
305 ******************************************************************************/
306
307 ACPI_STATUS
308 AcpiMarkGpeForWake (
309 ACPI_HANDLE GpeDevice,
310 UINT32 GpeNumber)
311 {
312 ACPI_GPE_EVENT_INFO *GpeEventInfo;
313 ACPI_STATUS Status = AE_BAD_PARAMETER;
314 ACPI_CPU_FLAGS Flags;
315
316
317 ACPI_FUNCTION_TRACE (AcpiMarkGpeForWake);
318
319
320 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
321
322 /* Ensure that we have a valid GPE number */
323
324 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
325 if (GpeEventInfo)
326 {
327 /* Mark the GPE as a possible wake event */
328
329 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
330 Status = AE_OK;
331 }
332
333 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
334 return_ACPI_STATUS (Status);
335 }
336
ACPI_EXPORT_SYMBOL(AcpiMarkGpeForWake)337 ACPI_EXPORT_SYMBOL (AcpiMarkGpeForWake)
338
339
340 /*******************************************************************************
341 *
342 * FUNCTION: AcpiSetupGpeForWake
343 *
344 * PARAMETERS: WakeDevice - Device associated with the GPE (via _PRW)
345 * GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
346 * GpeNumber - GPE level within the GPE block
347 *
348 * RETURN: Status
349 *
350 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
351 * interface is intended to be used as the host executes the
352 * _PRW methods (Power Resources for Wake) in the system tables.
353 * Each _PRW appears under a Device Object (The WakeDevice), and
354 * contains the info for the wake GPE associated with the
355 * WakeDevice.
356 *
357 ******************************************************************************/
358
359 ACPI_STATUS
360 AcpiSetupGpeForWake (
361 ACPI_HANDLE WakeDevice,
362 ACPI_HANDLE GpeDevice,
363 UINT32 GpeNumber)
364 {
365 ACPI_STATUS Status;
366 ACPI_GPE_EVENT_INFO *GpeEventInfo;
367 ACPI_NAMESPACE_NODE *DeviceNode;
368 ACPI_GPE_NOTIFY_INFO *Notify;
369 ACPI_GPE_NOTIFY_INFO *NewNotify;
370 ACPI_CPU_FLAGS Flags;
371
372
373 ACPI_FUNCTION_TRACE (AcpiSetupGpeForWake);
374
375
376 /* Parameter Validation */
377
378 if (!WakeDevice)
379 {
380 /*
381 * By forcing WakeDevice to be valid, we automatically enable the
382 * implicit notify feature on all hosts.
383 */
384 return_ACPI_STATUS (AE_BAD_PARAMETER);
385 }
386
387 /* Handle root object case */
388
389 if (WakeDevice == ACPI_ROOT_OBJECT)
390 {
391 DeviceNode = AcpiGbl_RootNode;
392 }
393 else
394 {
395 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, WakeDevice);
396 }
397
398 /* Validate WakeDevice is of type Device */
399
400 if (DeviceNode->Type != ACPI_TYPE_DEVICE)
401 {
402 return_ACPI_STATUS (AE_BAD_PARAMETER);
403 }
404
405 /*
406 * Allocate a new notify object up front, in case it is needed.
407 * Memory allocation while holding a spinlock is a big no-no
408 * on some hosts.
409 */
410 NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
411 if (!NewNotify)
412 {
413 return_ACPI_STATUS (AE_NO_MEMORY);
414 }
415
416 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
417
418 /* Ensure that we have a valid GPE number */
419
420 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
421 if (!GpeEventInfo)
422 {
423 Status = AE_BAD_PARAMETER;
424 goto UnlockAndExit;
425 }
426
427 /*
428 * If there is no method or handler for this GPE, then the
429 * WakeDevice will be notified whenever this GPE fires. This is
430 * known as an "implicit notify". Note: The GPE is assumed to be
431 * level-triggered (for windows compatibility).
432 */
433 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
434 ACPI_GPE_DISPATCH_NONE)
435 {
436 /*
437 * This is the first device for implicit notify on this GPE.
438 * Just set the flags here, and enter the NOTIFY block below.
439 */
440 GpeEventInfo->Flags =
441 (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
442 }
443
444 /*
445 * If we already have an implicit notify on this GPE, add
446 * this device to the notify list.
447 */
448 if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
449 ACPI_GPE_DISPATCH_NOTIFY)
450 {
451 /* Ensure that the device is not already in the list */
452
453 Notify = GpeEventInfo->Dispatch.NotifyList;
454 while (Notify)
455 {
456 if (Notify->DeviceNode == DeviceNode)
457 {
458 Status = AE_ALREADY_EXISTS;
459 goto UnlockAndExit;
460 }
461 Notify = Notify->Next;
462 }
463
464 /* Add this device to the notify list for this GPE */
465
466 NewNotify->DeviceNode = DeviceNode;
467 NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
468 GpeEventInfo->Dispatch.NotifyList = NewNotify;
469 NewNotify = NULL;
470 }
471
472 /* Mark the GPE as a possible wake event */
473
474 GpeEventInfo->Flags |= ACPI_GPE_CAN_WAKE;
475 Status = AE_OK;
476
477
478 UnlockAndExit:
479 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
480
481 /* Delete the notify object if it was not used above */
482
483 if (NewNotify)
484 {
485 ACPI_FREE (NewNotify);
486 }
487 return_ACPI_STATUS (Status);
488 }
489
ACPI_EXPORT_SYMBOL(AcpiSetupGpeForWake)490 ACPI_EXPORT_SYMBOL (AcpiSetupGpeForWake)
491
492
493 /*******************************************************************************
494 *
495 * FUNCTION: AcpiSetGpeWakeMask
496 *
497 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
498 * GpeNumber - GPE level within the GPE block
499 * Action - Enable or Disable
500 *
501 * RETURN: Status
502 *
503 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
504 * already be marked as a WAKE GPE.
505 *
506 ******************************************************************************/
507
508 ACPI_STATUS
509 AcpiSetGpeWakeMask (
510 ACPI_HANDLE GpeDevice,
511 UINT32 GpeNumber,
512 UINT8 Action)
513 {
514 ACPI_STATUS Status = AE_OK;
515 ACPI_GPE_EVENT_INFO *GpeEventInfo;
516 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
517 ACPI_CPU_FLAGS Flags;
518 UINT32 RegisterBit;
519
520
521 ACPI_FUNCTION_TRACE (AcpiSetGpeWakeMask);
522
523
524 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
525
526 /*
527 * Ensure that we have a valid GPE number and that this GPE is in
528 * fact a wake GPE
529 */
530 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
531 if (!GpeEventInfo)
532 {
533 Status = AE_BAD_PARAMETER;
534 goto UnlockAndExit;
535 }
536
537 if (!(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
538 {
539 Status = AE_TYPE;
540 goto UnlockAndExit;
541 }
542
543 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
544 if (!GpeRegisterInfo)
545 {
546 Status = AE_NOT_EXIST;
547 goto UnlockAndExit;
548 }
549
550 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
551
552 /* Perform the action */
553
554 switch (Action)
555 {
556 case ACPI_GPE_ENABLE:
557
558 ACPI_SET_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
559 break;
560
561 case ACPI_GPE_DISABLE:
562
563 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForWake, (UINT8) RegisterBit);
564 break;
565
566 default:
567
568 ACPI_ERROR ((AE_INFO, "%u, Invalid action", Action));
569 Status = AE_BAD_PARAMETER;
570 break;
571 }
572
573 UnlockAndExit:
574 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
575 return_ACPI_STATUS (Status);
576 }
577
ACPI_EXPORT_SYMBOL(AcpiSetGpeWakeMask)578 ACPI_EXPORT_SYMBOL (AcpiSetGpeWakeMask)
579
580
581 /*******************************************************************************
582 *
583 * FUNCTION: AcpiClearGpe
584 *
585 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
586 * GpeNumber - GPE level within the GPE block
587 *
588 * RETURN: Status
589 *
590 * DESCRIPTION: Clear an ACPI event (general purpose)
591 *
592 ******************************************************************************/
593
594 ACPI_STATUS
595 AcpiClearGpe (
596 ACPI_HANDLE GpeDevice,
597 UINT32 GpeNumber)
598 {
599 ACPI_STATUS Status = AE_OK;
600 ACPI_GPE_EVENT_INFO *GpeEventInfo;
601 ACPI_CPU_FLAGS Flags;
602
603
604 ACPI_FUNCTION_TRACE (AcpiClearGpe);
605
606
607 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
608
609 /* Ensure that we have a valid GPE number */
610
611 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
612 if (!GpeEventInfo)
613 {
614 Status = AE_BAD_PARAMETER;
615 goto UnlockAndExit;
616 }
617
618 Status = AcpiHwClearGpe (GpeEventInfo);
619
620 UnlockAndExit:
621 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
622 return_ACPI_STATUS (Status);
623 }
624
ACPI_EXPORT_SYMBOL(AcpiClearGpe)625 ACPI_EXPORT_SYMBOL (AcpiClearGpe)
626
627
628 /*******************************************************************************
629 *
630 * FUNCTION: AcpiGetGpeStatus
631 *
632 * PARAMETERS: GpeDevice - Parent GPE Device. NULL for GPE0/GPE1
633 * GpeNumber - GPE level within the GPE block
634 * EventStatus - Where the current status of the event
635 * will be returned
636 *
637 * RETURN: Status
638 *
639 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
640 *
641 ******************************************************************************/
642
643 ACPI_STATUS
644 AcpiGetGpeStatus (
645 ACPI_HANDLE GpeDevice,
646 UINT32 GpeNumber,
647 ACPI_EVENT_STATUS *EventStatus)
648 {
649 ACPI_STATUS Status = AE_OK;
650 ACPI_GPE_EVENT_INFO *GpeEventInfo;
651 ACPI_CPU_FLAGS Flags;
652
653
654 ACPI_FUNCTION_TRACE (AcpiGetGpeStatus);
655
656
657 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
658
659 /* Ensure that we have a valid GPE number */
660
661 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
662 if (!GpeEventInfo)
663 {
664 Status = AE_BAD_PARAMETER;
665 goto UnlockAndExit;
666 }
667
668 /* Obtain status on the requested GPE number */
669
670 Status = AcpiHwGetGpeStatus (GpeEventInfo, EventStatus);
671
672 UnlockAndExit:
673 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
674 return_ACPI_STATUS (Status);
675 }
676
ACPI_EXPORT_SYMBOL(AcpiGetGpeStatus)677 ACPI_EXPORT_SYMBOL (AcpiGetGpeStatus)
678
679
680 /*******************************************************************************
681 *
682 * FUNCTION: AcpiFinishGpe
683 *
684 * PARAMETERS: GpeDevice - Namespace node for the GPE Block
685 * (NULL for FADT defined GPEs)
686 * GpeNumber - GPE level within the GPE block
687 *
688 * RETURN: Status
689 *
690 * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
691 * processing. Intended for use by asynchronous host-installed
692 * GPE handlers. The GPE is only reenabled if the EnableForRun bit
693 * is set in the GPE info.
694 *
695 ******************************************************************************/
696
697 ACPI_STATUS
698 AcpiFinishGpe (
699 ACPI_HANDLE GpeDevice,
700 UINT32 GpeNumber)
701 {
702 ACPI_GPE_EVENT_INFO *GpeEventInfo;
703 ACPI_STATUS Status;
704 ACPI_CPU_FLAGS Flags;
705
706
707 ACPI_FUNCTION_TRACE (AcpiFinishGpe);
708
709
710 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
711
712 /* Ensure that we have a valid GPE number */
713
714 GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
715 if (!GpeEventInfo)
716 {
717 Status = AE_BAD_PARAMETER;
718 goto UnlockAndExit;
719 }
720
721 Status = AcpiEvFinishGpe (GpeEventInfo);
722
723 UnlockAndExit:
724 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
725 return_ACPI_STATUS (Status);
726 }
727
ACPI_EXPORT_SYMBOL(AcpiFinishGpe)728 ACPI_EXPORT_SYMBOL (AcpiFinishGpe)
729
730
731 /******************************************************************************
732 *
733 * FUNCTION: AcpiDisableAllGpes
734 *
735 * PARAMETERS: None
736 *
737 * RETURN: Status
738 *
739 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
740 *
741 ******************************************************************************/
742
743 ACPI_STATUS
744 AcpiDisableAllGpes (
745 void)
746 {
747 ACPI_STATUS Status;
748
749
750 ACPI_FUNCTION_TRACE (AcpiDisableAllGpes);
751
752
753 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
754 if (ACPI_FAILURE (Status))
755 {
756 return_ACPI_STATUS (Status);
757 }
758
759 Status = AcpiHwDisableAllGpes ();
760 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
761
762 return_ACPI_STATUS (Status);
763 }
764
ACPI_EXPORT_SYMBOL(AcpiDisableAllGpes)765 ACPI_EXPORT_SYMBOL (AcpiDisableAllGpes)
766
767
768 /******************************************************************************
769 *
770 * FUNCTION: AcpiEnableAllRuntimeGpes
771 *
772 * PARAMETERS: None
773 *
774 * RETURN: Status
775 *
776 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
777 *
778 ******************************************************************************/
779
780 ACPI_STATUS
781 AcpiEnableAllRuntimeGpes (
782 void)
783 {
784 ACPI_STATUS Status;
785
786
787 ACPI_FUNCTION_TRACE (AcpiEnableAllRuntimeGpes);
788
789
790 Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
791 if (ACPI_FAILURE (Status))
792 {
793 return_ACPI_STATUS (Status);
794 }
795
796 Status = AcpiHwEnableAllRuntimeGpes ();
797 (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
798
799 return_ACPI_STATUS (Status);
800 }
801
ACPI_EXPORT_SYMBOL(AcpiEnableAllRuntimeGpes)802 ACPI_EXPORT_SYMBOL (AcpiEnableAllRuntimeGpes)
803
804
805 /*******************************************************************************
806 *
807 * FUNCTION: AcpiInstallGpeBlock
808 *
809 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
810 * GpeBlockAddress - Address and SpaceID
811 * RegisterCount - Number of GPE register pairs in the block
812 * InterruptNumber - H/W interrupt for the block
813 *
814 * RETURN: Status
815 *
816 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
817 * enabled here.
818 *
819 ******************************************************************************/
820
821 ACPI_STATUS
822 AcpiInstallGpeBlock (
823 ACPI_HANDLE GpeDevice,
824 ACPI_GENERIC_ADDRESS *GpeBlockAddress,
825 UINT32 RegisterCount,
826 UINT32 InterruptNumber)
827 {
828 ACPI_STATUS Status;
829 ACPI_OPERAND_OBJECT *ObjDesc;
830 ACPI_NAMESPACE_NODE *Node;
831 ACPI_GPE_BLOCK_INFO *GpeBlock;
832
833
834 ACPI_FUNCTION_TRACE (AcpiInstallGpeBlock);
835
836
837 if ((!GpeDevice) ||
838 (!GpeBlockAddress) ||
839 (!RegisterCount))
840 {
841 return_ACPI_STATUS (AE_BAD_PARAMETER);
842 }
843
844 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
845 if (ACPI_FAILURE (Status))
846 {
847 return_ACPI_STATUS (Status);
848 }
849
850 Node = AcpiNsValidateHandle (GpeDevice);
851 if (!Node)
852 {
853 Status = AE_BAD_PARAMETER;
854 goto UnlockAndExit;
855 }
856
857 /* Validate the parent device */
858
859 if (Node->Type != ACPI_TYPE_DEVICE)
860 {
861 Status = AE_TYPE;
862 goto UnlockAndExit;
863 }
864
865 if (Node->Object)
866 {
867 Status = AE_ALREADY_EXISTS;
868 goto UnlockAndExit;
869 }
870
871 /*
872 * For user-installed GPE Block Devices, the GpeBlockBaseNumber
873 * is always zero
874 */
875 Status = AcpiEvCreateGpeBlock (Node, GpeBlockAddress->Address,
876 GpeBlockAddress->SpaceId, RegisterCount,
877 0, InterruptNumber, &GpeBlock);
878 if (ACPI_FAILURE (Status))
879 {
880 goto UnlockAndExit;
881 }
882
883 /* Install block in the DeviceObject attached to the node */
884
885 ObjDesc = AcpiNsGetAttachedObject (Node);
886 if (!ObjDesc)
887 {
888 /*
889 * No object, create a new one (Device nodes do not always have
890 * an attached object)
891 */
892 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_DEVICE);
893 if (!ObjDesc)
894 {
895 Status = AE_NO_MEMORY;
896 goto UnlockAndExit;
897 }
898
899 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_DEVICE);
900
901 /* Remove local reference to the object */
902
903 AcpiUtRemoveReference (ObjDesc);
904 if (ACPI_FAILURE (Status))
905 {
906 goto UnlockAndExit;
907 }
908 }
909
910 /* Now install the GPE block in the DeviceObject */
911
912 ObjDesc->Device.GpeBlock = GpeBlock;
913
914
915 UnlockAndExit:
916 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
917 return_ACPI_STATUS (Status);
918 }
919
ACPI_EXPORT_SYMBOL(AcpiInstallGpeBlock)920 ACPI_EXPORT_SYMBOL (AcpiInstallGpeBlock)
921
922
923 /*******************************************************************************
924 *
925 * FUNCTION: AcpiRemoveGpeBlock
926 *
927 * PARAMETERS: GpeDevice - Handle to the parent GPE Block Device
928 *
929 * RETURN: Status
930 *
931 * DESCRIPTION: Remove a previously installed block of GPE registers
932 *
933 ******************************************************************************/
934
935 ACPI_STATUS
936 AcpiRemoveGpeBlock (
937 ACPI_HANDLE GpeDevice)
938 {
939 ACPI_OPERAND_OBJECT *ObjDesc;
940 ACPI_STATUS Status;
941 ACPI_NAMESPACE_NODE *Node;
942
943
944 ACPI_FUNCTION_TRACE (AcpiRemoveGpeBlock);
945
946
947 if (!GpeDevice)
948 {
949 return_ACPI_STATUS (AE_BAD_PARAMETER);
950 }
951
952 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
953 if (ACPI_FAILURE (Status))
954 {
955 return_ACPI_STATUS (Status);
956 }
957
958 Node = AcpiNsValidateHandle (GpeDevice);
959 if (!Node)
960 {
961 Status = AE_BAD_PARAMETER;
962 goto UnlockAndExit;
963 }
964
965 /* Validate the parent device */
966
967 if (Node->Type != ACPI_TYPE_DEVICE)
968 {
969 Status = AE_TYPE;
970 goto UnlockAndExit;
971 }
972
973 /* Get the DeviceObject attached to the node */
974
975 ObjDesc = AcpiNsGetAttachedObject (Node);
976 if (!ObjDesc ||
977 !ObjDesc->Device.GpeBlock)
978 {
979 return_ACPI_STATUS (AE_NULL_OBJECT);
980 }
981
982 /* Delete the GPE block (but not the DeviceObject) */
983
984 Status = AcpiEvDeleteGpeBlock (ObjDesc->Device.GpeBlock);
985 if (ACPI_SUCCESS (Status))
986 {
987 ObjDesc->Device.GpeBlock = NULL;
988 }
989
990 UnlockAndExit:
991 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
992 return_ACPI_STATUS (Status);
993 }
994
ACPI_EXPORT_SYMBOL(AcpiRemoveGpeBlock)995 ACPI_EXPORT_SYMBOL (AcpiRemoveGpeBlock)
996
997
998 /*******************************************************************************
999 *
1000 * FUNCTION: AcpiGetGpeDevice
1001 *
1002 * PARAMETERS: Index - System GPE index (0-CurrentGpeCount)
1003 * GpeDevice - Where the parent GPE Device is returned
1004 *
1005 * RETURN: Status
1006 *
1007 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
1008 * gpe device indicates that the gpe number is contained in one of
1009 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
1010 *
1011 ******************************************************************************/
1012
1013 ACPI_STATUS
1014 AcpiGetGpeDevice (
1015 UINT32 Index,
1016 ACPI_HANDLE *GpeDevice)
1017 {
1018 ACPI_GPE_DEVICE_INFO Info;
1019 ACPI_STATUS Status;
1020
1021
1022 ACPI_FUNCTION_TRACE (AcpiGetGpeDevice);
1023
1024
1025 if (!GpeDevice)
1026 {
1027 return_ACPI_STATUS (AE_BAD_PARAMETER);
1028 }
1029
1030 if (Index >= AcpiCurrentGpeCount)
1031 {
1032 return_ACPI_STATUS (AE_NOT_EXIST);
1033 }
1034
1035 /* Setup and walk the GPE list */
1036
1037 Info.Index = Index;
1038 Info.Status = AE_NOT_EXIST;
1039 Info.GpeDevice = NULL;
1040 Info.NextBlockBaseIndex = 0;
1041
1042 Status = AcpiEvWalkGpeList (AcpiEvGetGpeDevice, &Info);
1043 if (ACPI_FAILURE (Status))
1044 {
1045 return_ACPI_STATUS (Status);
1046 }
1047
1048 *GpeDevice = ACPI_CAST_PTR (ACPI_HANDLE, Info.GpeDevice);
1049 return_ACPI_STATUS (Info.Status);
1050 }
1051
1052 ACPI_EXPORT_SYMBOL (AcpiGetGpeDevice)
1053
1054 #endif /* !ACPI_REDUCED_HARDWARE */
1055