901 lines
28 KiB
C
901 lines
28 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evgpe - General Purpose Event handling and dispatch
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* 2. License
|
|
*
|
|
* 2.1. This is your license from Intel Corp. under its intellectual property
|
|
* rights. You may have additional license terms from the party that provided
|
|
* you this software, covering your right to use that party's intellectual
|
|
* property rights.
|
|
*
|
|
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
|
* copy of the source code appearing in this file ("Covered Code") an
|
|
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
|
* base code distributed originally by Intel ("Original Intel Code") to copy,
|
|
* make derivatives, distribute, use and display any portion of the Covered
|
|
* Code in any form, with the right to sublicense such rights; and
|
|
*
|
|
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
|
|
* license (with the right to sublicense), under only those claims of Intel
|
|
* patents that are infringed by the Original Intel Code, to make, use, sell,
|
|
* offer to sell, and import the Covered Code and derivative works thereof
|
|
* solely to the minimum extent necessary to exercise the above copyright
|
|
* license, and in no event shall the patent license extend to any additions
|
|
* to or modifications of the Original Intel Code. No other license or right
|
|
* is granted directly or by implication, estoppel or otherwise;
|
|
*
|
|
* The above copyright and patent license is granted only if the following
|
|
* conditions are met:
|
|
*
|
|
* 3. Conditions
|
|
*
|
|
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
|
|
*
|
|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
|
|
* make.
|
|
*
|
|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* Intel Code.
|
|
*
|
|
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
|
* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
|
|
*
|
|
* 4. Disclaimer and Export Compliance
|
|
*
|
|
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
|
|
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
|
|
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE.
|
|
*
|
|
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
|
|
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
|
|
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
|
|
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
|
|
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
|
* LIMITED REMEDY.
|
|
*
|
|
* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
|
* software or system incorporating such software without first obtaining any
|
|
* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
|
|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
|
|
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
|
|
* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
|
* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
|
|
* such license, approval or letter.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include "acpi.h"
|
|
#include "accommon.h"
|
|
#include "acevents.h"
|
|
#include "acnamesp.h"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME ("evgpe")
|
|
|
|
/* Local prototypes */
|
|
|
|
static void ACPI_SYSTEM_XFACE
|
|
AcpiEvAsynchExecuteGpeMethod (
|
|
void *Context);
|
|
|
|
static void ACPI_SYSTEM_XFACE
|
|
AcpiEvAsynchEnableGpe (
|
|
void *Context);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvUpdateGpeEnableMask
|
|
*
|
|
* PARAMETERS: GpeEventInfo - GPE to update
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Updates GPE register enable mask based upon whether there are
|
|
* runtime references to this GPE
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvUpdateGpeEnableMask (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
|
|
UINT32 RegisterBit;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvUpdateGpeEnableMask);
|
|
|
|
|
|
GpeRegisterInfo = GpeEventInfo->RegisterInfo;
|
|
if (!GpeRegisterInfo)
|
|
{
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|
|
RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo, GpeRegisterInfo);
|
|
|
|
/* Clear the run bit up front */
|
|
|
|
ACPI_CLEAR_BIT (GpeRegisterInfo->EnableForRun, RegisterBit);
|
|
|
|
/* Set the mask bit only if there are references to this GPE */
|
|
|
|
if (GpeEventInfo->RuntimeCount)
|
|
{
|
|
ACPI_SET_BIT (GpeRegisterInfo->EnableForRun, (UINT8) RegisterBit);
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvEnableGpe
|
|
*
|
|
* PARAMETERS: GpeEventInfo - GPE to enable
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear a GPE of stale events and enable it.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvEnableGpe (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvEnableGpe);
|
|
|
|
|
|
/*
|
|
* We will only allow a GPE to be enabled if it has either an associated
|
|
* method (_Lxx/_Exx) or a handler, or is using the implicit notify
|
|
* feature. Otherwise, the GPE will be immediately disabled by
|
|
* AcpiEvGpeDispatch the first time it fires.
|
|
*/
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
|
|
ACPI_GPE_DISPATCH_NONE)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_HANDLER);
|
|
}
|
|
|
|
/* Clear the GPE (of stale events) */
|
|
|
|
Status = AcpiHwClearGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Enable the requested GPE */
|
|
|
|
Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAddGpeReference
|
|
*
|
|
* PARAMETERS: GpeEventInfo - Add a reference to this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
|
|
* hardware-enabled.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvAddGpeReference (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvAddGpeReference);
|
|
|
|
|
|
if (GpeEventInfo->RuntimeCount == ACPI_UINT8_MAX)
|
|
{
|
|
return_ACPI_STATUS (AE_LIMIT);
|
|
}
|
|
|
|
GpeEventInfo->RuntimeCount++;
|
|
if (GpeEventInfo->RuntimeCount == 1)
|
|
{
|
|
/* Enable on first reference */
|
|
|
|
Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AcpiEvEnableGpe (GpeEventInfo);
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
GpeEventInfo->RuntimeCount--;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvRemoveGpeReference
|
|
*
|
|
* PARAMETERS: GpeEventInfo - Remove a reference to this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a reference to a GPE. When the last reference is
|
|
* removed, the GPE is hardware-disabled.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvRemoveGpeReference (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvRemoveGpeReference);
|
|
|
|
|
|
if (!GpeEventInfo->RuntimeCount)
|
|
{
|
|
return_ACPI_STATUS (AE_LIMIT);
|
|
}
|
|
|
|
GpeEventInfo->RuntimeCount--;
|
|
if (!GpeEventInfo->RuntimeCount)
|
|
{
|
|
/* Disable on last reference */
|
|
|
|
Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
GpeEventInfo->RuntimeCount++;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvLowGetGpeInfo
|
|
*
|
|
* PARAMETERS: GpeNumber - Raw GPE number
|
|
* GpeBlock - A GPE info block
|
|
*
|
|
* RETURN: A GPE EventInfo struct. NULL if not a valid GPE (The GpeNumber
|
|
* is not within the specified GPE block)
|
|
*
|
|
* DESCRIPTION: Returns the EventInfo struct associated with this GPE. This is
|
|
* the low-level implementation of EvGetGpeEventInfo.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_GPE_EVENT_INFO *
|
|
AcpiEvLowGetGpeInfo (
|
|
UINT32 GpeNumber,
|
|
ACPI_GPE_BLOCK_INFO *GpeBlock)
|
|
{
|
|
UINT32 GpeIndex;
|
|
|
|
|
|
/*
|
|
* Validate that the GpeNumber is within the specified GpeBlock.
|
|
* (Two steps)
|
|
*/
|
|
if (!GpeBlock ||
|
|
(GpeNumber < GpeBlock->BlockBaseNumber))
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
GpeIndex = GpeNumber - GpeBlock->BlockBaseNumber;
|
|
if (GpeIndex >= GpeBlock->GpeCount)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
return (&GpeBlock->EventInfo[GpeIndex]);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGetGpeEventInfo
|
|
*
|
|
* PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
|
|
* GpeNumber - Raw GPE number
|
|
*
|
|
* RETURN: A GPE EventInfo struct. NULL if not a valid GPE
|
|
*
|
|
* DESCRIPTION: Returns the EventInfo struct associated with this GPE.
|
|
* Validates the GpeBlock and the GpeNumber
|
|
*
|
|
* Should be called only when the GPE lists are semaphore locked
|
|
* and not subject to change.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_GPE_EVENT_INFO *
|
|
AcpiEvGetGpeEventInfo (
|
|
ACPI_HANDLE GpeDevice,
|
|
UINT32 GpeNumber)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_GPE_EVENT_INFO *GpeInfo;
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* A NULL GpeDevice means use the FADT-defined GPE block(s) */
|
|
|
|
if (!GpeDevice)
|
|
{
|
|
/* Examine GPE Block 0 and 1 (These blocks are permanent) */
|
|
|
|
for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++)
|
|
{
|
|
GpeInfo = AcpiEvLowGetGpeInfo (GpeNumber,
|
|
AcpiGbl_GpeFadtBlocks[i]);
|
|
if (GpeInfo)
|
|
{
|
|
return (GpeInfo);
|
|
}
|
|
}
|
|
|
|
/* The GpeNumber was not in the range of either FADT GPE block */
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* A Non-NULL GpeDevice means this is a GPE Block Device */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) GpeDevice);
|
|
if (!ObjDesc ||
|
|
!ObjDesc->Device.GpeBlock)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
return (AcpiEvLowGetGpeInfo (GpeNumber, ObjDesc->Device.GpeBlock));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGpeDetect
|
|
*
|
|
* PARAMETERS: GpeXruptList - Interrupt block for this interrupt.
|
|
* Can have multiple GPE blocks attached.
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Detect if any GP events have occurred. This function is
|
|
* executed at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiEvGpeDetect (
|
|
ACPI_GPE_XRUPT_INFO *GpeXruptList)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_GPE_BLOCK_INFO *GpeBlock;
|
|
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo;
|
|
UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
|
|
UINT8 EnabledStatusByte;
|
|
UINT32 StatusReg;
|
|
UINT32 EnableReg;
|
|
ACPI_CPU_FLAGS Flags;
|
|
UINT32 i;
|
|
UINT32 j;
|
|
|
|
|
|
ACPI_FUNCTION_NAME (EvGpeDetect);
|
|
|
|
/* Check for the case where there are no GPEs */
|
|
|
|
if (!GpeXruptList)
|
|
{
|
|
return (IntStatus);
|
|
}
|
|
|
|
/*
|
|
* We need to obtain the GPE lock for both the data structs and registers
|
|
* Note: Not necessary to obtain the hardware lock, since the GPE
|
|
* registers are owned by the GpeLock.
|
|
*/
|
|
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
|
|
|
|
/* Examine all GPE blocks attached to this interrupt level */
|
|
|
|
GpeBlock = GpeXruptList->GpeBlockListHead;
|
|
while (GpeBlock)
|
|
{
|
|
/*
|
|
* Read all of the 8-bit GPE status and enable registers in this GPE
|
|
* block, saving all of them. Find all currently active GP events.
|
|
*/
|
|
for (i = 0; i < GpeBlock->RegisterCount; i++)
|
|
{
|
|
/* Get the next status/enable pair */
|
|
|
|
GpeRegisterInfo = &GpeBlock->RegisterInfo[i];
|
|
|
|
/*
|
|
* Optimization: If there are no GPEs enabled within this
|
|
* register, we can safely ignore the entire register.
|
|
*/
|
|
if (!(GpeRegisterInfo->EnableForRun |
|
|
GpeRegisterInfo->EnableForWake))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
/* Read the Status Register */
|
|
|
|
Status = AcpiHwRead (&StatusReg, &GpeRegisterInfo->StatusAddress);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Read the Enable Register */
|
|
|
|
Status = AcpiHwRead (&EnableReg, &GpeRegisterInfo->EnableAddress);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
|
|
"Read GPE Register at GPE%02X: Status=%02X, Enable=%02X\n",
|
|
GpeRegisterInfo->BaseGpeNumber, StatusReg, EnableReg));
|
|
|
|
/* Check if there is anything active at all in this register */
|
|
|
|
EnabledStatusByte = (UINT8) (StatusReg & EnableReg);
|
|
if (!EnabledStatusByte)
|
|
{
|
|
/* No active GPEs in this register, move on */
|
|
|
|
continue;
|
|
}
|
|
|
|
/* Now look at the individual GPEs in this byte register */
|
|
|
|
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
|
|
{
|
|
/* Examine one GPE bit */
|
|
|
|
if (EnabledStatusByte & (1 << j))
|
|
{
|
|
/*
|
|
* Found an active GPE. Dispatch the event to a handler
|
|
* or method.
|
|
*/
|
|
IntStatus |= AcpiEvGpeDispatch (GpeBlock->Node,
|
|
&GpeBlock->EventInfo[((ACPI_SIZE) i *
|
|
ACPI_GPE_REGISTER_WIDTH) + j],
|
|
j + GpeRegisterInfo->BaseGpeNumber);
|
|
}
|
|
}
|
|
}
|
|
|
|
GpeBlock = GpeBlock->Next;
|
|
}
|
|
|
|
UnlockAndExit:
|
|
|
|
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
|
|
return (IntStatus);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAsynchExecuteGpeMethod
|
|
*
|
|
* PARAMETERS: Context (GpeEventInfo) - Info for this GPE
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Perform the actual execution of a GPE control method. This
|
|
* function is called from an invocation of AcpiOsExecute and
|
|
* therefore does NOT execute at interrupt level - so that
|
|
* the control method itself is not executed in the context of
|
|
* an interrupt handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void ACPI_SYSTEM_XFACE
|
|
AcpiEvAsynchExecuteGpeMethod (
|
|
void *Context)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
|
|
ACPI_STATUS Status;
|
|
ACPI_GPE_EVENT_INFO *LocalGpeEventInfo;
|
|
ACPI_EVALUATE_INFO *Info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvAsynchExecuteGpeMethod);
|
|
|
|
|
|
/* Allocate a local GPE block */
|
|
|
|
LocalGpeEventInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_EVENT_INFO));
|
|
if (!LocalGpeEventInfo)
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
|
|
"while handling a GPE"));
|
|
return_VOID;
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Must revalidate the GpeNumber/GpeBlock */
|
|
|
|
if (!AcpiEvValidGpeEvent (GpeEventInfo))
|
|
{
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* Take a snapshot of the GPE info for this level - we copy the info to
|
|
* prevent a race condition with RemoveHandler/RemoveBlock.
|
|
*/
|
|
ACPI_MEMCPY (LocalGpeEventInfo, GpeEventInfo,
|
|
sizeof (ACPI_GPE_EVENT_INFO));
|
|
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Do the correct dispatch - normal method or implicit notify */
|
|
|
|
switch (LocalGpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
|
|
{
|
|
case ACPI_GPE_DISPATCH_NOTIFY:
|
|
|
|
/*
|
|
* Implicit notify.
|
|
* Dispatch a DEVICE_WAKE notify to the appropriate handler.
|
|
* NOTE: the request is queued for execution after this method
|
|
* completes. The notify handlers are NOT invoked synchronously
|
|
* from this thread -- because handlers may in turn run other
|
|
* control methods.
|
|
*/
|
|
Status = AcpiEvQueueNotifyRequest (
|
|
LocalGpeEventInfo->Dispatch.DeviceNode,
|
|
ACPI_NOTIFY_DEVICE_WAKE);
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
|
|
/* Allocate the evaluation information block */
|
|
|
|
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
|
|
if (!Info)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the
|
|
* _Lxx/_Exx control method that corresponds to this GPE
|
|
*/
|
|
Info->PrefixNode = LocalGpeEventInfo->Dispatch.MethodNode;
|
|
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
|
|
|
|
Status = AcpiNsEvaluate (Info);
|
|
ACPI_FREE (Info);
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"while evaluating GPE method [%4.4s]",
|
|
AcpiUtGetNodeName (LocalGpeEventInfo->Dispatch.MethodNode)));
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
return_VOID; /* Should never happen */
|
|
}
|
|
|
|
/* Defer enabling of GPE until all notify handlers are done */
|
|
|
|
Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
|
|
AcpiEvAsynchEnableGpe, LocalGpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_FREE (LocalGpeEventInfo);
|
|
}
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAsynchEnableGpe
|
|
*
|
|
* PARAMETERS: Context (GpeEventInfo) - Info for this GPE
|
|
* Callback from AcpiOsExecute
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
|
|
* complete (i.e., finish execution of Notify)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void ACPI_SYSTEM_XFACE
|
|
AcpiEvAsynchEnableGpe (
|
|
void *Context)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo = Context;
|
|
|
|
|
|
(void) AcpiEvFinishGpe (GpeEventInfo);
|
|
|
|
ACPI_FREE (GpeEventInfo);
|
|
return;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvFinishGpe
|
|
*
|
|
* PARAMETERS: GpeEventInfo - Info for this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
|
|
* of a GPE method or a synchronous or asynchronous GPE handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvFinishGpe (
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_LEVEL_TRIGGERED)
|
|
{
|
|
/*
|
|
* GPE is level-triggered, we clear the GPE status bit after
|
|
* handling the event.
|
|
*/
|
|
Status = AcpiHwClearGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable this GPE, conditionally. This means that the GPE will
|
|
* only be physically enabled if the EnableForRun bit is set
|
|
* in the EventInfo.
|
|
*/
|
|
(void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvGpeDispatch
|
|
*
|
|
* PARAMETERS: GpeDevice - Device node. NULL for GPE0/GPE1
|
|
* GpeEventInfo - Info for this GPE
|
|
* GpeNumber - Number relative to the parent GPE block
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
|
|
* or method (e.g. _Lxx/_Exx) handler.
|
|
*
|
|
* This function executes at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiEvGpeDispatch (
|
|
ACPI_NAMESPACE_NODE *GpeDevice,
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo,
|
|
UINT32 GpeNumber)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 ReturnValue;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvGpeDispatch);
|
|
|
|
|
|
/* Invoke global event handler if present */
|
|
|
|
AcpiGpeCount++;
|
|
if (AcpiGbl_GlobalEventHandler)
|
|
{
|
|
AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_GPE, GpeDevice,
|
|
GpeNumber, AcpiGbl_GlobalEventHandlerContext);
|
|
}
|
|
|
|
/*
|
|
* If edge-triggered, clear the GPE status bit now. Note that
|
|
* level-triggered events are cleared after the GPE is serviced.
|
|
*/
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_EDGE_TRIGGERED)
|
|
{
|
|
Status = AcpiHwClearGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to clear GPE%02X", GpeNumber));
|
|
return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Always disable the GPE so that it does not keep firing before
|
|
* any asynchronous activity completes (either from the execution
|
|
* of a GPE method or an asynchronous GPE handler.)
|
|
*
|
|
* If there is no handler or method to run, just disable the
|
|
* GPE and leave it disabled permanently to prevent further such
|
|
* pointless events from firing.
|
|
*/
|
|
Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to disable GPE%02X", GpeNumber));
|
|
return_UINT32 (ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* Dispatch the GPE to either an installed handler or the control
|
|
* method associated with this GPE (_Lxx or _Exx). If a handler
|
|
* exists, we invoke it and do not attempt to run the method.
|
|
* If there is neither a handler nor a method, leave the GPE
|
|
* disabled.
|
|
*/
|
|
switch (GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK)
|
|
{
|
|
case ACPI_GPE_DISPATCH_HANDLER:
|
|
|
|
/* Invoke the installed handler (at interrupt level) */
|
|
|
|
ReturnValue = GpeEventInfo->Dispatch.Handler->Address (
|
|
GpeDevice, GpeNumber,
|
|
GpeEventInfo->Dispatch.Handler->Context);
|
|
|
|
/* If requested, clear (if level-triggered) and reenable the GPE */
|
|
|
|
if (ReturnValue & ACPI_REENABLE_GPE)
|
|
{
|
|
(void) AcpiEvFinishGpe (GpeEventInfo);
|
|
}
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
case ACPI_GPE_DISPATCH_NOTIFY:
|
|
|
|
/*
|
|
* Execute the method associated with the GPE
|
|
* NOTE: Level-triggered GPEs are cleared after the method completes.
|
|
*/
|
|
Status = AcpiOsExecute (OSL_GPE_HANDLER,
|
|
AcpiEvAsynchExecuteGpeMethod, GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Unable to queue handler for GPE%02X - event disabled",
|
|
GpeNumber));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/*
|
|
* No handler or method to run!
|
|
* 03/2010: This case should no longer be possible. We will not allow
|
|
* a GPE to be enabled if it has no handler or method.
|
|
*/
|
|
ACPI_ERROR ((AE_INFO,
|
|
"No handler or method for GPE%02X, disabling event",
|
|
GpeNumber));
|
|
break;
|
|
}
|
|
|
|
return_UINT32 (ACPI_INTERRUPT_HANDLED);
|
|
}
|
|
|