evxface.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acevents.h"
#include "acinterp.h"

Include dependency graph for evxface.c:

Go to the source code of this file.

Macros
#define	EXPORT_ACPI_INTERFACES
#define	_COMPONENT   ACPI_EVENTS

Functions
static ACPI_STATUS	AcpiEvInstallGpeHandler (ACPI_HANDLE GpeDevice, UINT32 GpeNumber, UINT32 Type, BOOLEAN IsRawHandler, ACPI_GPE_HANDLER Address, void *Context)
ACPI_STATUS	AcpiInstallNotifyHandler (ACPI_HANDLE Device, UINT32 HandlerType, ACPI_NOTIFY_HANDLER Handler, void *Context)
ACPI_STATUS	AcpiRemoveNotifyHandler (ACPI_HANDLE Device, UINT32 HandlerType, ACPI_NOTIFY_HANDLER Handler)
ACPI_STATUS	AcpiInstallExceptionHandler (ACPI_EXCEPTION_HANDLER Handler)
ACPI_STATUS	AcpiInstallSciHandler (ACPI_SCI_HANDLER Address, void *Context)
ACPI_STATUS	AcpiRemoveSciHandler (ACPI_SCI_HANDLER Address)
ACPI_STATUS	AcpiInstallGlobalEventHandler (ACPI_GBL_EVENT_HANDLER Handler, void *Context)
ACPI_STATUS	AcpiInstallFixedEventHandler (UINT32 Event, ACPI_EVENT_HANDLER Handler, void *Context)
ACPI_STATUS	AcpiRemoveFixedEventHandler (UINT32 Event, ACPI_EVENT_HANDLER Handler)
ACPI_STATUS	AcpiInstallGpeHandler (ACPI_HANDLE GpeDevice, UINT32 GpeNumber, UINT32 Type, ACPI_GPE_HANDLER Address, void *Context)
ACPI_STATUS	AcpiInstallGpeRawHandler (ACPI_HANDLE GpeDevice, UINT32 GpeNumber, UINT32 Type, ACPI_GPE_HANDLER Address, void *Context)
ACPI_STATUS	AcpiRemoveGpeHandler (ACPI_HANDLE GpeDevice, UINT32 GpeNumber, ACPI_GPE_HANDLER Address)
ACPI_STATUS	AcpiAcquireGlobalLock (UINT16 Timeout, UINT32 *Handle)
ACPI_STATUS	AcpiReleaseGlobalLock (UINT32 Handle)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 52 of file evxface.c.

EXPORT_ACPI_INTERFACES

#define EXPORT_ACPI_INTERFACES

Definition at line 44 of file evxface.c.

Function Documentation

AcpiAcquireGlobalLock()

ACPI_STATUS AcpiAcquireGlobalLock	(	UINT16	Timeout,
		UINT32 *	Handle
	)

Definition at line 1205 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    if (!Handle)
    {
        return (AE_BAD_PARAMETER);
    }
 
    /* Must lock interpreter to prevent race conditions */
 
    AcpiExEnterInterpreter ();
 
    Status = AcpiExAcquireMutexObject (Timeout,
        AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
 
    if (ACPI_SUCCESS (Status))
    {
        /* Return the global lock handle (updated in AcpiEvAcquireGlobalLock) */
 
        *Handle = AcpiGbl_GlobalLockHandle;
    }
 
    AcpiExExitInterpreter ();
    return (Status);
}

AcpiEvInstallGpeHandler()

static ACPI_STATUS AcpiEvInstallGpeHandler ( ACPI_HANDLE  GpeDevice, UINT32  GpeNumber, UINT32  Type, BOOLEAN  IsRawHandler, ACPI_GPE_HANDLER  Address, void *  Context  )

static

Definition at line 860 of file evxface.c.

{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    ACPI_GPE_HANDLER_INFO   *Handler;
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;
 
 
    ACPI_FUNCTION_TRACE (EvInstallGpeHandler);
 
 
    /* Parameter validation */
 
    if ((!Address) || (Type & ~ACPI_GPE_XRUPT_TYPE_MASK))
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Allocate and init handler object (before lock) */
 
    Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_HANDLER_INFO));
    if (!Handler)
    {
        Status = AE_NO_MEMORY;
        goto UnlockAndExit;
    }
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
    /* Ensure that we have a valid GPE number */
 
    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
    if (!GpeEventInfo)
    {
        Status = AE_BAD_PARAMETER;
        goto FreeAndExit;
    }
 
    /* Make sure that there isn't a handler there already */
 
    if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_HANDLER) ||
        (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_RAW_HANDLER))
    {
        Status = AE_ALREADY_EXISTS;
        goto FreeAndExit;
    }
 
    Handler->Address = Address;
    Handler->Context = Context;
    Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode;
    Handler->OriginalFlags = (UINT8) (GpeEventInfo->Flags &
        (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK));
 
    /*
     * If the GPE is associated with a method, it may have been enabled
     * automatically during initialization, in which case it has to be
     * disabled now to avoid spurious execution of the handler.
     */
    if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) ==
            ACPI_GPE_DISPATCH_METHOD) ||
         (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) ==
            ACPI_GPE_DISPATCH_NOTIFY)) &&
        GpeEventInfo->RuntimeCount)
    {
        Handler->OriginallyEnabled = TRUE;
        (void) AcpiEvRemoveGpeReference (GpeEventInfo);
 
        /* Sanity check of original type against new type */
 
        if (Type != (UINT32) (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
        {
            ACPI_WARNING ((AE_INFO, "GPE type mismatch (level/edge)"));
        }
    }
 
    /* Install the handler */
 
    GpeEventInfo->Dispatch.Handler = Handler;
 
    /* Setup up dispatch flags to indicate handler (vs. method/notify) */
 
    GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
    GpeEventInfo->Flags |= (UINT8) (Type | (IsRawHandler ?
        ACPI_GPE_DISPATCH_RAW_HANDLER : ACPI_GPE_DISPATCH_HANDLER));
 
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
 
FreeAndExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    ACPI_FREE (Handler);
    goto UnlockAndExit;
}

Referenced by AcpiInstallGpeHandler(), and AcpiInstallGpeRawHandler().

AcpiInstallExceptionHandler()

ACPI_STATUS AcpiInstallExceptionHandler

(

ACPI_EXCEPTION_HANDLER

Handler

)

Definition at line 427 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler);
 
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Don't allow two handlers. */
 
    if (AcpiGbl_ExceptionHandler)
    {
        Status = AE_ALREADY_EXISTS;
        goto Cleanup;
    }
 
    /* Install the handler */
 
    AcpiGbl_ExceptionHandler = Handler;
 
Cleanup:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiInstallExceptionHandler().

AcpiInstallFixedEventHandler()

ACPI_STATUS AcpiInstallFixedEventHandler	(	UINT32	Event,
		ACPI_EVENT_HANDLER	Handler,
		void *	Context
	)

Definition at line 707 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallFixedEventHandler);
 
 
    /* Parameter validation */
 
    if (Event > ACPI_EVENT_MAX)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Do not allow multiple handlers */
 
    if (AcpiGbl_FixedEventHandlers[Event].Handler)
    {
        Status = AE_ALREADY_EXISTS;
        goto Cleanup;
    }
 
    /* Install the handler before enabling the event */
 
    AcpiGbl_FixedEventHandlers[Event].Handler = Handler;
    AcpiGbl_FixedEventHandlers[Event].Context = Context;
 
    Status = AcpiEnableEvent (Event, 0);
    if (ACPI_FAILURE (Status))
    {
        ACPI_WARNING ((AE_INFO,
            "Could not enable fixed event - %s (%u)",
            AcpiUtGetEventName (Event), Event));
 
        /* Remove the handler */
 
        AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
        AcpiGbl_FixedEventHandlers[Event].Context = NULL;
    }
    else
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
            "Enabled fixed event %s (%X), Handler=%p\n",
            AcpiUtGetEventName (Event), Event, Handler));
    }
 
 
Cleanup:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by acpi_button_add(), AcpiEvInitGlobalLockHandler(), and AcpiInstallFixedEventHandler().

AcpiInstallGlobalEventHandler()

ACPI_STATUS AcpiInstallGlobalEventHandler	(	ACPI_GBL_EVENT_HANDLER	Handler,
		void *	Context
	)

Definition at line 647 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallGlobalEventHandler);
 
 
    /* Parameter validation */
 
    if (!Handler)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Don't allow two handlers. */
 
    if (AcpiGbl_GlobalEventHandler)
    {
        Status = AE_ALREADY_EXISTS;
        goto Cleanup;
    }
 
    AcpiGbl_GlobalEventHandler = Handler;
    AcpiGbl_GlobalEventHandlerContext = Context;
 
 
Cleanup:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiInstallGlobalEventHandler().

AcpiInstallGpeHandler()

ACPI_STATUS AcpiInstallGpeHandler	(	ACPI_HANDLE	GpeDevice,
		UINT32	GpeNumber,
		UINT32	Type,
		ACPI_GPE_HANDLER	Address,
		void *	Context
	)

Definition at line 992 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler);
 
 
    Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type,
        FALSE, Address, Context);
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiInstallGpeHandler().

AcpiInstallGpeRawHandler()

ACPI_STATUS AcpiInstallGpeRawHandler	(	ACPI_HANDLE	GpeDevice,
		UINT32	GpeNumber,
		UINT32	Type,
		ACPI_GPE_HANDLER	Address,
		void *	Context
	)

Definition at line 1033 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallGpeRawHandler);
 
 
    Status = AcpiEvInstallGpeHandler (GpeDevice, GpeNumber, Type,
        TRUE, Address, Context);
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiInstallGpeRawHandler().

AcpiInstallNotifyHandler()

ACPI_STATUS AcpiInstallNotifyHandler	(	ACPI_HANDLE	Device,
		UINT32	HandlerType,
		ACPI_NOTIFY_HANDLER	Handler,
		void *	Context
	)

Definition at line 96 of file evxface.c.

{
    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device);
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *HandlerObj;
    ACPI_STATUS             Status;
    UINT32                  i;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler);
 
 
    /* Parameter validation */
 
    if ((!Device) || (!Handler) || (!HandlerType) ||
        (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /*
     * Root Object:
     * Registering a notify handler on the root object indicates that the
     * caller wishes to receive notifications for all objects. Note that
     * only one global handler can be registered per notify type.
     * Ensure that a handler is not already installed.
     */
    if (Device == ACPI_ROOT_OBJECT)
    {
        for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
        {
            if (HandlerType & (i+1))
            {
                if (AcpiGbl_GlobalNotify[i].Handler)
                {
                    Status = AE_ALREADY_EXISTS;
                    goto UnlockAndExit;
                }
 
                AcpiGbl_GlobalNotify[i].Handler = Handler;
                AcpiGbl_GlobalNotify[i].Context = Context;
            }
        }
 
        goto UnlockAndExit; /* Global notify handler installed, all done */
    }
 
    /*
     * All Other Objects:
     * Caller will only receive notifications specific to the target
     * object. Note that only certain object types are allowed to
     * receive notifications.
     */
 
    /* Are Notifies allowed on this object? */
 
    if (!AcpiEvIsNotifyObject (Node))
    {
        Status = AE_TYPE;
        goto UnlockAndExit;
    }
 
    /* Check for an existing internal object, might not exist */
 
    ObjDesc = AcpiNsGetAttachedObject (Node);
    if (!ObjDesc)
    {
        /* Create a new object */
 
        ObjDesc = AcpiUtCreateInternalObject (Node->Type);
        if (!ObjDesc)
        {
            Status = AE_NO_MEMORY;
            goto UnlockAndExit;
        }
 
        /* Attach new object to the Node, remove local reference */
 
        Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type);
        AcpiUtRemoveReference (ObjDesc);
        if (ACPI_FAILURE (Status))
        {
            goto UnlockAndExit;
        }
    }
 
    /* Ensure that the handler is not already installed in the lists */
 
    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
    {
        if (HandlerType & (i+1))
        {
            HandlerObj = ObjDesc->CommonNotify.NotifyList[i];
            while (HandlerObj)
            {
                if (HandlerObj->Notify.Handler == Handler)
                {
                    Status = AE_ALREADY_EXISTS;
                    goto UnlockAndExit;
                }
 
                HandlerObj = HandlerObj->Notify.Next[i];
            }
        }
    }
 
    /* Create and populate a new notify handler object */
 
    HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY);
    if (!HandlerObj)
    {
        Status = AE_NO_MEMORY;
        goto UnlockAndExit;
    }
 
    HandlerObj->Notify.Node = Node;
    HandlerObj->Notify.HandlerType = HandlerType;
    HandlerObj->Notify.Handler = Handler;
    HandlerObj->Notify.Context = Context;
 
    /* Install the handler at the list head(s) */
 
    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
    {
        if (HandlerType & (i+1))
        {
            HandlerObj->Notify.Next[i] =
                ObjDesc->CommonNotify.NotifyList[i];
 
            ObjDesc->CommonNotify.NotifyList[i] = HandlerObj;
        }
    }
 
    /* Add an extra reference if handler was installed in both lists */
 
    if (HandlerType == ACPI_ALL_NOTIFY)
    {
        AcpiUtAddReference (HandlerObj);
    }
 
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    return_ACPI_STATUS (Status);
}

Referenced by acpi_bus_init(), acpi_button_add(), and AcpiInstallNotifyHandler().

AcpiInstallSciHandler()

ACPI_STATUS AcpiInstallSciHandler	(	ACPI_SCI_HANDLER	Address,
		void *	Context
	)

Definition at line 477 of file evxface.c.

{
    ACPI_SCI_HANDLER_INFO   *NewSciHandler;
    ACPI_SCI_HANDLER_INFO   *SciHandler;
    ACPI_CPU_FLAGS          Flags;
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiInstallSciHandler);
 
 
    if (!Address)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    /* Allocate and init a handler object */
 
    NewSciHandler = ACPI_ALLOCATE (sizeof (ACPI_SCI_HANDLER_INFO));
    if (!NewSciHandler)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    NewSciHandler->Address = Address;
    NewSciHandler->Context = Context;
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }
 
    /* Lock list during installation */
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    SciHandler = AcpiGbl_SciHandlerList;
 
    /* Ensure handler does not already exist */
 
    while (SciHandler)
    {
        if (Address == SciHandler->Address)
        {
            Status = AE_ALREADY_EXISTS;
            goto UnlockAndExit;
        }
 
        SciHandler = SciHandler->Next;
    }
 
    /* Install the new handler into the global list (at head) */
 
    NewSciHandler->Next = AcpiGbl_SciHandlerList;
    AcpiGbl_SciHandlerList = NewSciHandler;
 
 
UnlockAndExit:
 
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
 
Exit:
    if (ACPI_FAILURE (Status))
    {
        ACPI_FREE (NewSciHandler);
    }
    return_ACPI_STATUS (Status);
}

Referenced by AcpiInstallSciHandler().

AcpiReleaseGlobalLock()

ACPI_STATUS AcpiReleaseGlobalLock

(

UINT32

Handle

)

Definition at line 1251 of file evxface.c.

{
    ACPI_STATUS             Status;
 
 
    if (!Handle || (Handle != AcpiGbl_GlobalLockHandle))
    {
        return (AE_NOT_ACQUIRED);
    }
 
    Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
    return (Status);
}

AcpiRemoveFixedEventHandler()

ACPI_STATUS AcpiRemoveFixedEventHandler	(	UINT32	Event,
		ACPI_EVENT_HANDLER	Handler
	)

Definition at line 786 of file evxface.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (AcpiRemoveFixedEventHandler);
 
 
    /* Parameter validation */
 
    if (Event > ACPI_EVENT_MAX)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Disable the event before removing the handler */
 
    Status = AcpiDisableEvent (Event, 0);
 
    /* Always Remove the handler */
 
    AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
    AcpiGbl_FixedEventHandlers[Event].Context = NULL;
 
    if (ACPI_FAILURE (Status))
    {
        ACPI_WARNING ((AE_INFO,
            "Could not disable fixed event - %s (%u)",
            AcpiUtGetEventName (Event), Event));
    }
    else
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
            "Disabled fixed event - %s (%X)\n",
            AcpiUtGetEventName (Event), Event));
    }
 
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by acpi_button_remove(), AcpiEvRemoveGlobalLockHandler(), and AcpiRemoveFixedEventHandler().

AcpiRemoveGpeHandler()

ACPI_STATUS AcpiRemoveGpeHandler	(	ACPI_HANDLE	GpeDevice,
		UINT32	GpeNumber,
		ACPI_GPE_HANDLER	Address
	)

Definition at line 1071 of file evxface.c.

{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    ACPI_GPE_HANDLER_INFO   *Handler;
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;
 
 
    ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler);
 
 
    /* Parameter validation */
 
    if (!Address)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
    /* Ensure that we have a valid GPE number */
 
    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
    if (!GpeEventInfo)
    {
        Status = AE_BAD_PARAMETER;
        goto UnlockAndExit;
    }
 
    /* Make sure that a handler is indeed installed */
 
    if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) !=
            ACPI_GPE_DISPATCH_HANDLER) &&
        (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) !=
            ACPI_GPE_DISPATCH_RAW_HANDLER))
    {
        Status = AE_NOT_EXIST;
        goto UnlockAndExit;
    }
 
    /* Make sure that the installed handler is the same */
 
    if (GpeEventInfo->Dispatch.Handler->Address != Address)
    {
        Status = AE_BAD_PARAMETER;
        goto UnlockAndExit;
    }
 
    /* Remove the handler */
 
    Handler = GpeEventInfo->Dispatch.Handler;
    GpeEventInfo->Dispatch.Handler = NULL;
 
    /* Restore Method node (if any), set dispatch flags */
 
    GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode;
    GpeEventInfo->Flags &=
        ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
    GpeEventInfo->Flags |= Handler->OriginalFlags;
 
    /*
     * If the GPE was previously associated with a method and it was
     * enabled, it should be enabled at this point to restore the
     * post-initialization configuration.
     */
    if (((ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) ==
            ACPI_GPE_DISPATCH_METHOD) ||
         (ACPI_GPE_DISPATCH_TYPE (Handler->OriginalFlags) ==
            ACPI_GPE_DISPATCH_NOTIFY)) &&
        Handler->OriginallyEnabled)
    {
        (void) AcpiEvAddGpeReference (GpeEventInfo, FALSE);
        if (ACPI_GPE_IS_POLLING_NEEDED (GpeEventInfo))
        {
            /* Poll edge triggered GPEs to handle existing events */
 
            AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
            (void) AcpiEvDetectGpe (
                GpeDevice, GpeEventInfo, GpeNumber);
            Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
        }
    }
 
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
 
    /* Make sure all deferred GPE tasks are completed */
 
    AcpiOsWaitEventsComplete ();
 
    /* Now we can free the handler object */
 
    ACPI_FREE (Handler);
    return_ACPI_STATUS (Status);
 
UnlockAndExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiRemoveGpeHandler().

AcpiRemoveNotifyHandler()

ACPI_STATUS AcpiRemoveNotifyHandler	(	ACPI_HANDLE	Device,
		UINT32	HandlerType,
		ACPI_NOTIFY_HANDLER	Handler
	)

Definition at line 273 of file evxface.c.

{
    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Device);
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *HandlerObj;
    ACPI_OPERAND_OBJECT     *PreviousHandlerObj;
    ACPI_STATUS             Status = AE_OK;
    UINT32                  i;
 
 
    ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler);
 
 
    /* Parameter validation */
 
    if ((!Device) || (!Handler) || (!HandlerType) ||
        (HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    /* Root Object. Global handlers are removed here */
 
    if (Device == ACPI_ROOT_OBJECT)
    {
        for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
        {
            if (HandlerType & (i+1))
            {
                Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
                if (ACPI_FAILURE (Status))
                {
                    return_ACPI_STATUS (Status);
                }
 
                if (!AcpiGbl_GlobalNotify[i].Handler ||
                    (AcpiGbl_GlobalNotify[i].Handler != Handler))
                {
                    Status = AE_NOT_EXIST;
                    goto UnlockAndExit;
                }
 
                ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                    "Removing global notify handler\n"));
 
                AcpiGbl_GlobalNotify[i].Handler = NULL;
                AcpiGbl_GlobalNotify[i].Context = NULL;
 
                (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 
                /* Make sure all deferred notify tasks are completed */
 
                AcpiOsWaitEventsComplete ();
            }
        }
 
        return_ACPI_STATUS (AE_OK);
    }
 
    /* All other objects: Are Notifies allowed on this object? */
 
    if (!AcpiEvIsNotifyObject (Node))
    {
        return_ACPI_STATUS (AE_TYPE);
    }
 
    /* Must have an existing internal object */
 
    ObjDesc = AcpiNsGetAttachedObject (Node);
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }
 
    /* Internal object exists. Find the handler and remove it */
 
    for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
    {
        if (HandlerType & (i+1))
        {
            Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
 
            HandlerObj = ObjDesc->CommonNotify.NotifyList[i];
            PreviousHandlerObj = NULL;
 
            /* Attempt to find the handler in the handler list */
 
            while (HandlerObj &&
                  (HandlerObj->Notify.Handler != Handler))
            {
                PreviousHandlerObj = HandlerObj;
                HandlerObj = HandlerObj->Notify.Next[i];
            }
 
            if (!HandlerObj)
            {
                Status = AE_NOT_EXIST;
                goto UnlockAndExit;
            }
 
            /* Remove the handler object from the list */
 
            if (PreviousHandlerObj) /* Handler is not at the list head */
            {
                PreviousHandlerObj->Notify.Next[i] =
                    HandlerObj->Notify.Next[i];
            }
            else /* Handler is at the list head */
            {
                ObjDesc->CommonNotify.NotifyList[i] =
                    HandlerObj->Notify.Next[i];
            }
 
            (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 
            /* Make sure all deferred notify tasks are completed */
 
            AcpiOsWaitEventsComplete ();
            AcpiUtRemoveReference (HandlerObj);
        }
    }
 
    return_ACPI_STATUS (Status);
 
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    return_ACPI_STATUS (Status);
}

Referenced by acpi_bus_exit(), acpi_bus_init(), acpi_button_remove(), and AcpiRemoveNotifyHandler().

AcpiRemoveSciHandler()

ACPI_STATUS AcpiRemoveSciHandler

(

ACPI_SCI_HANDLER

Address

)

Definition at line 565 of file evxface.c.

{
    ACPI_SCI_HANDLER_INFO   *PrevSciHandler;
    ACPI_SCI_HANDLER_INFO   *NextSciHandler;
    ACPI_CPU_FLAGS          Flags;
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (AcpiRemoveSciHandler);
 
 
    if (!Address)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Remove the SCI handler with lock */
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
    PrevSciHandler = NULL;
    NextSciHandler = AcpiGbl_SciHandlerList;
    while (NextSciHandler)
    {
        if (NextSciHandler->Address == Address)
        {
            /* Unlink and free the SCI handler info block */
 
            if (PrevSciHandler)
            {
                PrevSciHandler->Next = NextSciHandler->Next;
            }
            else
            {
                AcpiGbl_SciHandlerList = NextSciHandler->Next;
            }
 
            AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
            ACPI_FREE (NextSciHandler);
            goto UnlockAndExit;
        }
 
        PrevSciHandler = NextSciHandler;
        NextSciHandler = NextSciHandler->Next;
    }
 
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    Status = AE_NOT_EXIST;
 
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiRemoveSciHandler().