1 /******************************************************************************
3 * Module Name: evgpe - General Purpose Event handling and dispatch
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************
116 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
150 *****************************************************************************/
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acevents.h>
155 #include <contrib/dev/acpica/include/acnamesp.h>
157 #define _COMPONENT ACPI_EVENTS
158 ACPI_MODULE_NAME ("evgpe")
160 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
162 /* Local prototypes */
164 static void ACPI_SYSTEM_XFACE
165 AcpiEvAsynchExecuteGpeMethod (
168 static void ACPI_SYSTEM_XFACE
169 AcpiEvAsynchEnableGpe (
173 /*******************************************************************************
175 * FUNCTION: AcpiEvUpdateGpeEnableMask
177 * PARAMETERS: GpeEventInfo - GPE to update
181 * DESCRIPTION: Updates GPE register enable mask based upon whether there are
182 * runtime references to this GPE
184 ******************************************************************************/
187 AcpiEvUpdateGpeEnableMask (
188 ACPI_GPE_EVENT_INFO *GpeEventInfo)
190 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
194 ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMask);
197 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
198 if (!GpeRegisterInfo)
200 return_ACPI_STATUS (AE_NOT_EXIST);
203 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
205 /* Clear the run bit up front */
207 ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit);
209 /* Set the mask bit only if there are references to this GPE */
211 if (GpeEventInfo->RuntimeCount)
213 ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, (UINT8) RegisterBit);
216 GpeRegisterInfo->EnableMask = GpeRegisterInfo->EnableForRun;
217 return_ACPI_STATUS (AE_OK);
221 /*******************************************************************************
223 * FUNCTION: AcpiEvEnableGpe
225 * PARAMETERS: GpeEventInfo - GPE to enable
229 * DESCRIPTION: Clear a GPE of stale events and enable it.
231 ******************************************************************************/
235 ACPI_GPE_EVENT_INFO *GpeEventInfo)
240 ACPI_FUNCTION_TRACE (EvEnableGpe);
243 /* Clear the GPE (of stale events) */
245 Status = AcpiHwClearGpe (GpeEventInfo);
246 if (ACPI_FAILURE (Status))
248 return_ACPI_STATUS (Status);
251 /* Enable the requested GPE */
253 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
254 return_ACPI_STATUS (Status);
258 /*******************************************************************************
260 * FUNCTION: AcpiEvMaskGpe
262 * PARAMETERS: GpeEventInfo - GPE to be blocked/unblocked
263 * IsMasked - Whether the GPE is masked or not
267 * DESCRIPTION: Unconditionally mask/unmask a GPE during runtime.
269 ******************************************************************************/
273 ACPI_GPE_EVENT_INFO *GpeEventInfo,
276 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
280 ACPI_FUNCTION_TRACE (EvMaskGpe);
283 GpeRegisterInfo = GpeEventInfo->RegisterInfo;
284 if (!GpeRegisterInfo)
286 return_ACPI_STATUS (AE_NOT_EXIST);
289 RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);
291 /* Perform the action */
295 if (RegisterBit & GpeRegisterInfo->MaskForRun)
297 return_ACPI_STATUS (AE_BAD_PARAMETER);
300 (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
301 ACPI_SET_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
305 if (!(RegisterBit & GpeRegisterInfo->MaskForRun))
307 return_ACPI_STATUS (AE_BAD_PARAMETER);
310 ACPI_CLEAR_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
311 if (GpeEventInfo->RuntimeCount &&
312 !GpeEventInfo->DisableForDispatch)
314 (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
318 return_ACPI_STATUS (AE_OK);
322 /*******************************************************************************
324 * FUNCTION: AcpiEvAddGpeReference
326 * PARAMETERS: GpeEventInfo - Add a reference to this GPE
330 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
333 ******************************************************************************/
336 AcpiEvAddGpeReference (
337 ACPI_GPE_EVENT_INFO *GpeEventInfo)
339 ACPI_STATUS Status = AE_OK;
342 ACPI_FUNCTION_TRACE (EvAddGpeReference);
345 if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX)
347 return_ACPI_STATUS (AE_LIMIT);
350 GpeEventInfo->RuntimeCount++;
351 if (GpeEventInfo->RuntimeCount == 1)
353 /* Enable on first reference */
355 Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
356 if (ACPI_SUCCESS (Status))
358 Status = AcpiEvEnableGpe (GpeEventInfo);
361 if (ACPI_FAILURE (Status))
363 GpeEventInfo->RuntimeCount--;
367 return_ACPI_STATUS (Status);
371 /*******************************************************************************
373 * FUNCTION: AcpiEvRemoveGpeReference
375 * PARAMETERS: GpeEventInfo - Remove a reference to this GPE
379 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
380 * removed, the GPE is hardware-disabled.
382 ******************************************************************************/
385 AcpiEvRemoveGpeReference (
386 ACPI_GPE_EVENT_INFO *GpeEventInfo)
388 ACPI_STATUS Status = AE_OK;
391 ACPI_FUNCTION_TRACE (EvRemoveGpeReference);
394 if (!GpeEventInfo->RuntimeCount)
396 return_ACPI_STATUS (AE_LIMIT);
399 GpeEventInfo->RuntimeCount--;
400 if (!GpeEventInfo->RuntimeCount)
402 /* Disable on last reference */
404 Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
405 if (ACPI_SUCCESS (Status))
407 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
410 if (ACPI_FAILURE (Status))
412 GpeEventInfo->RuntimeCount++;
416 return_ACPI_STATUS (Status);
420 /*******************************************************************************
422 * FUNCTION: AcpiEvLowGetGpeInfo
424 * PARAMETERS: GpeNumber - Raw GPE number
425 * GpeBlock - A GPE info block
427 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE (The GpeNumber
428 * is not within the specified GPE block)
430 * DESCRIPTION: Returns the EventInfo struct associated with this GPE. This is
431 * the low-level implementation of EvGetGpeEventInfo.
433 ******************************************************************************/
435 ACPI_GPE_EVENT_INFO *
436 AcpiEvLowGetGpeInfo (
438 ACPI_GPE_BLOCK_INFO *GpeBlock)
444 * Validate that the GpeNumber is within the specified GpeBlock.
448 (GpeNumber < GpeBlock->BlockBaseNumber))
453 GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber;
454 if (GpeIndex >= GpeBlock->GpeCount)
459 return (&GpeBlock->EventInfo[GpeIndex]);
463 /*******************************************************************************
465 * FUNCTION: AcpiEvGetGpeEventInfo
467 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
468 * GpeNumber - Raw GPE number
470 * RETURN: A GPE EventInfo struct. NULL if not a valid GPE
472 * DESCRIPTION: Returns the EventInfo struct associated with this GPE.
473 * Validates the GpeBlock and the GpeNumber
475 * Should be called only when the GPE lists are semaphore locked
476 * and not subject to change.
478 ******************************************************************************/
480 ACPI_GPE_EVENT_INFO *
481 AcpiEvGetGpeEventInfo (
482 ACPI_HANDLE GpeDevice,
485 ACPI_OPERAND_OBJECT *ObjDesc;
486 ACPI_GPE_EVENT_INFO *GpeInfo;
490 ACPI_FUNCTION_ENTRY ();
493 /* A NULL GpeDevice means use the FADT-defined GPE block(s) */
497 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
499 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++)
501 GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber,
502 AcpiGbl_GpeFadtBlocks[i]);
509 /* The GpeNumber was not in the range of either FADT GPE block */
514 /* A Non-NULL GpeDevice means this is a GPE Block Device */
516 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice);
518 !ObjDesc->Device.GpeBlock)
523 return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock));
527 /*******************************************************************************
529 * FUNCTION: AcpiEvGpeDetect
531 * PARAMETERS: GpeXruptList - Interrupt block for this interrupt.
532 * Can have multiple GPE blocks attached.
534 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
536 * DESCRIPTION: Detect if any GP events have occurred. This function is
537 * executed at interrupt level.
539 ******************************************************************************/
543 ACPI_GPE_XRUPT_INFO *GpeXruptList)
546 ACPI_GPE_BLOCK_INFO *GpeBlock;
547 ACPI_NAMESPACE_NODE *GpeDevice;
548 ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
549 ACPI_GPE_EVENT_INFO *GpeEventInfo;
551 ACPI_GPE_HANDLER_INFO *GpeHandlerInfo;
552 UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
553 UINT8 EnabledStatusByte;
556 ACPI_CPU_FLAGS Flags;
561 ACPI_FUNCTION_NAME (EvGpeDetect);
563 /* Check for the case where there are no GPEs */
571 * We need to obtain the GPE lock for both the data structs and registers
572 * Note: Not necessary to obtain the hardware lock, since the GPE
573 * registers are owned by the GpeLock.
575 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
577 /* Examine all GPE blocks attached to this interrupt level */
579 GpeBlock = GpeXruptList->GpeBlockListHead;
582 GpeDevice = GpeBlock->Node;
585 * Read all of the 8-bit GPE status and enable registers in this GPE
586 * block, saving all of them. Find all currently active GP events.
588 for (i = 0; i < GpeBlock->RegisterCount; i++)
590 /* Get the next status/enable pair */
592 GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
595 * Optimization: If there are no GPEs enabled within this
596 * register, we can safely ignore the entire register.
598 if (!(GpeRegisterInfo->EnableForRun |
599 GpeRegisterInfo->EnableForWake))
601 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
602 "Ignore disabled registers for GPE %02X-%02X: "
603 "RunEnable=%02X, WakeEnable=%02X\n",
604 GpeRegisterInfo->BaseGpeNumber,
605 GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
606 GpeRegisterInfo->EnableForRun,
607 GpeRegisterInfo->EnableForWake));
611 /* Read the Status Register */
613 Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
614 if (ACPI_FAILURE (Status))
619 /* Read the Enable Register */
621 Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
622 if (ACPI_FAILURE (Status))
627 ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
628 "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, "
629 "RunEnable=%02X, WakeEnable=%02X\n",
630 GpeRegisterInfo->BaseGpeNumber,
631 GpeRegisterInfo->BaseGpeNumber + (ACPI_GPE_REGISTER_WIDTH - 1),
632 StatusReg, EnableReg,
633 GpeRegisterInfo->EnableForRun,
634 GpeRegisterInfo->EnableForWake));
636 /* Check if there is anything active at all in this register */
638 EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
639 if (!EnabledStatusByte)
641 /* No active GPEs in this register, move on */
646 /* Now look at the individual GPEs in this byte register */
648 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
650 /* Examine one GPE bit */
652 GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
653 ACPI_GPE_REGISTER_WIDTH) + j];
654 GpeNumber = j + GpeRegisterInfo->BaseGpeNumber;
656 if (EnabledStatusByte & (1 << j))
658 /* Invoke global event handler if present */
661 if (AcpiGbl_GlobalEventHandler)
663 AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE,
664 GpeDevice, GpeNumber,
665 AcpiGbl_GlobalEventHandlerContext);
668 /* Found an active GPE */
670 if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
671 ACPI_GPE_DISPATCH_RAW_HANDLER)
673 /* Dispatch the event to a raw handler */
675 GpeHandlerInfo = GpeEventInfo->Dispatch.Handler;
678 * There is no protection around the namespace node
679 * and the GPE handler to ensure a safe destruction
681 * 1. The namespace node is expected to always
682 * exist after loading a table.
683 * 2. The GPE handler is expected to be flushed by
684 * AcpiOsWaitEventsComplete() before the
687 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
688 IntStatus |= GpeHandlerInfo->Address (
689 GpeDevice, GpeNumber, GpeHandlerInfo->Context);
690 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
695 * Dispatch the event to a standard handler or
698 IntStatus |= AcpiEvGpeDispatch (GpeDevice,
699 GpeEventInfo, GpeNumber);
705 GpeBlock = GpeBlock->Next;
710 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
715 /*******************************************************************************
717 * FUNCTION: AcpiEvAsynchExecuteGpeMethod
719 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE
723 * DESCRIPTION: Perform the actual execution of a GPE control method. This
724 * function is called from an invocation of AcpiOsExecute and
725 * therefore does NOT execute at interrupt level - so that
726 * the control method itself is not executed in the context of
727 * an interrupt handler.
729 ******************************************************************************/
731 static void ACPI_SYSTEM_XFACE
732 AcpiEvAsynchExecuteGpeMethod (
735 ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
736 ACPI_STATUS Status = AE_OK;
737 ACPI_EVALUATE_INFO *Info;
738 ACPI_GPE_NOTIFY_INFO *Notify;
741 ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
744 /* Do the correct dispatch - normal method or implicit notify */
746 switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
748 case ACPI_GPE_DISPATCH_NOTIFY:
751 * Dispatch a DEVICE_WAKE notify to the appropriate handler.
752 * NOTE: the request is queued for execution after this method
753 * completes. The notify handlers are NOT invoked synchronously
754 * from this thread -- because handlers may in turn run other
757 * June 2012: Expand implicit notify mechanism to support
758 * notifies on multiple device objects.
760 Notify = GpeEventInfo->Dispatch.NotifyList;
761 while (ACPI_SUCCESS (Status) && Notify)
763 Status = AcpiEvQueueNotifyRequest (
764 Notify->DeviceNode, ACPI_NOTIFY_DEVICE_WAKE);
766 Notify = Notify->Next;
770 case ACPI_GPE_DISPATCH_METHOD:
772 /* Allocate the evaluation information block */
774 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
777 Status = AE_NO_MEMORY;
782 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the
783 * _Lxx/_Exx control method that corresponds to this GPE
785 Info->PrefixNode = GpeEventInfo->Dispatch.MethodNode;
786 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
788 Status = AcpiNsEvaluate (Info);
792 if (ACPI_FAILURE (Status))
794 ACPI_EXCEPTION ((AE_INFO, Status,
795 "while evaluating GPE method [%4.4s]",
796 AcpiUtGetNodeName (GpeEventInfo->Dispatch.MethodNode)));
802 goto ErrorExit; /* Should never happen */
805 /* Defer enabling of GPE until all notify handlers are done */
807 Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
808 AcpiEvAsynchEnableGpe, GpeEventInfo);
809 if (ACPI_SUCCESS (Status))
815 AcpiEvAsynchEnableGpe (GpeEventInfo);
820 /*******************************************************************************
822 * FUNCTION: AcpiEvAsynchEnableGpe
824 * PARAMETERS: Context (GpeEventInfo) - Info for this GPE
825 * Callback from AcpiOsExecute
829 * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
830 * complete (i.e., finish execution of Notify)
832 ******************************************************************************/
834 static void ACPI_SYSTEM_XFACE
835 AcpiEvAsynchEnableGpe (
838 ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
839 ACPI_CPU_FLAGS Flags;
842 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
843 (void) AcpiEvFinishGpe (GpeEventInfo);
844 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
850 /*******************************************************************************
852 * FUNCTION: AcpiEvFinishGpe
854 * PARAMETERS: GpeEventInfo - Info for this GPE
858 * DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
859 * of a GPE method or a synchronous or asynchronous GPE handler.
861 ******************************************************************************/
865 ACPI_GPE_EVENT_INFO *GpeEventInfo)
870 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
871 ACPI_GPE_LEVEL_TRIGGERED)
874 * GPE is level-triggered, we clear the GPE status bit after
875 * handling the event.
877 Status = AcpiHwClearGpe (GpeEventInfo);
878 if (ACPI_FAILURE (Status))
885 * Enable this GPE, conditionally. This means that the GPE will
886 * only be physically enabled if the EnableMask bit is set
889 (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
890 GpeEventInfo->DisableForDispatch = FALSE;
895 /*******************************************************************************
897 * FUNCTION: AcpiEvGpeDispatch
899 * PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
900 * GpeEventInfo - Info for this GPE
901 * GpeNumber - Number relative to the parent GPE block
903 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
905 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
906 * or method (e.g. _Lxx/_Exx) handler.
908 * This function executes at interrupt level.
910 ******************************************************************************/
914 ACPI_NAMESPACE_NODE *GpeDevice,
915 ACPI_GPE_EVENT_INFO *GpeEventInfo,
922 ACPI_FUNCTION_TRACE (EvGpeDispatch);
926 * Always disable the GPE so that it does not keep firing before
927 * any asynchronous activity completes (either from the execution
928 * of a GPE method or an asynchronous GPE handler.)
930 * If there is no handler or method to run, just disable the
931 * GPE and leave it disabled permanently to prevent further such
932 * pointless events from firing.
934 Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
935 if (ACPI_FAILURE (Status))
937 ACPI_EXCEPTION ((AE_INFO, Status,
938 "Unable to disable GPE %02X", GpeNumber));
939 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
943 * If edge-triggered, clear the GPE status bit now. Note that
944 * level-triggered events are cleared after the GPE is serviced.
946 if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
947 ACPI_GPE_EDGE_TRIGGERED)
949 Status = AcpiHwClearGpe (GpeEventInfo);
950 if (ACPI_FAILURE (Status))
952 ACPI_EXCEPTION ((AE_INFO, Status,
953 "Unable to clear GPE %02X", GpeNumber));
954 (void) AcpiHwLowSetGpe (
955 GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
956 return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
960 GpeEventInfo->DisableForDispatch = TRUE;
963 * Dispatch the GPE to either an installed handler or the control
964 * method associated with this GPE (_Lxx or _Exx). If a handler
965 * exists, we invoke it and do not attempt to run the method.
966 * If there is neither a handler nor a method, leave the GPE
969 switch (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
971 case ACPI_GPE_DISPATCH_HANDLER:
973 /* Invoke the installed handler (at interrupt level) */
975 ReturnValue = GpeEventInfo->Dispatch.Handler->Address (
976 GpeDevice, GpeNumber,
977 GpeEventInfo->Dispatch.Handler->Context);
979 /* If requested, clear (if level-triggered) and reenable the GPE */
981 if (ReturnValue & ACPI_REENABLE_GPE)
983 (void) AcpiEvFinishGpe (GpeEventInfo);
987 case ACPI_GPE_DISPATCH_METHOD:
988 case ACPI_GPE_DISPATCH_NOTIFY:
990 * Execute the method associated with the GPE
991 * NOTE: Level-triggered GPEs are cleared after the method completes.
993 Status = AcpiOsExecute (OSL_GPE_HANDLER,
994 AcpiEvAsynchExecuteGpeMethod, GpeEventInfo);
995 if (ACPI_FAILURE (Status))
997 ACPI_EXCEPTION ((AE_INFO, Status,
998 "Unable to queue handler for GPE %02X - event disabled",
1005 * No handler or method to run!
1006 * 03/2010: This case should no longer be possible. We will not allow
1007 * a GPE to be enabled if it has no handler or method.
1009 ACPI_ERROR ((AE_INFO,
1010 "No handler or method for GPE %02X, disabling event",
1015 return_UINT32 (ACPI_INTERRUPT_HANDLED);
1018 #endif /* !ACPI_REDUCED_HARDWARE */