Exemple #1
0
ACPI_STATUS
AcpiSetGpe (
    ACPI_HANDLE             GpeDevice,
    UINT32                  GpeNumber,
    UINT8                   Action)
{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;


    ACPI_FUNCTION_TRACE (AcpiSetGpe);


    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Ensure that we have a valid GPE number */

    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
    if (!GpeEventInfo)
    {
        Status = AE_BAD_PARAMETER;
        goto UnlockAndExit;
    }

    /* Perform the action */

    switch (Action)
    {
    case ACPI_GPE_ENABLE:

        Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
        GpeEventInfo->DisableForDispatch = FALSE;
        break;

    case ACPI_GPE_DISABLE:

        Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
        GpeEventInfo->DisableForDispatch = TRUE;
        break;

    default:

        Status = AE_BAD_PARAMETER;
        break;
    }

UnlockAndExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return_ACPI_STATUS (Status);
}
Exemple #2
0
ACPI_STATUS
AcpiEvMaskGpe (
    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
    BOOLEAN                 IsMasked)
{
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
    UINT32                  RegisterBit;


    ACPI_FUNCTION_TRACE (EvMaskGpe);


    GpeRegisterInfo = GpeEventInfo->RegisterInfo;
    if (!GpeRegisterInfo)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    RegisterBit = AcpiHwGetGpeRegisterBit (GpeEventInfo);

    /* Perform the action */

    if (IsMasked)
    {
        if (RegisterBit & GpeRegisterInfo->MaskForRun)
        {
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        }

        (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
        ACPI_SET_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
    }
    else
    {
        if (!(RegisterBit & GpeRegisterInfo->MaskForRun))
        {
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        }

        ACPI_CLEAR_BIT (GpeRegisterInfo->MaskForRun, (UINT8) RegisterBit);
        if (GpeEventInfo->RuntimeCount &&
            !GpeEventInfo->DisableForDispatch)
        {
            (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_ENABLE);
        }
    }

    return_ACPI_STATUS (AE_OK);
}
Exemple #3
0
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 EnableMask bit is set
     * in the EventInfo.
     */
    (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
    return (AE_OK);
}
Exemple #4
0
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);
}
Exemple #5
0
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);
}
Exemple #6
0
ACPI_STATUS
AcpiDisableGpe (
    ACPI_HANDLE             GpeDevice,
    UINT32                  GpeNumber)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    ACPI_CPU_FLAGS          Flags;


    ACPI_FUNCTION_TRACE (AcpiDisableGpe);


    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Ensure that we have a valid GPE number */

    GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
    if (!GpeEventInfo)
    {
        Status = AE_BAD_PARAMETER;
        goto UnlockAndExit;
    }

    /* Hardware-disable a runtime GPE on removal of the last reference */

    if (!GpeEventInfo->RuntimeCount)
    {
        Status = AE_LIMIT; /* There are no references to remove */
        goto UnlockAndExit;
    }

    GpeEventInfo->RuntimeCount--;
    if (!GpeEventInfo->RuntimeCount)
    {
        Status = AcpiEvUpdateGpeEnableMask (GpeEventInfo);
        if (ACPI_SUCCESS (Status))
        {
            Status = AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
        }
        if (ACPI_FAILURE (Status))
        {
            GpeEventInfo->RuntimeCount++;
        }
    }

UnlockAndExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return_ACPI_STATUS (Status);
}
Exemple #7
0
ACPI_STATUS
AcpiEvEnableGpe (
    ACPI_GPE_EVENT_INFO     *GpeEventInfo)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (EvEnableGpe);


    /* 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);
}
Exemple #8
0
UINT32
AcpiEvGpeDispatch (
    ACPI_NAMESPACE_NODE     *GpeDevice,
    ACPI_GPE_EVENT_INFO     *GpeEventInfo,
    UINT32                  GpeNumber)
{
    ACPI_STATUS             Status;
    UINT32                  ReturnValue;


    ACPI_FUNCTION_TRACE (EvGpeDispatch);


    /*
     * 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);
    }

    /*
     * 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));
            (void) AcpiHwLowSetGpe (
                GpeEventInfo, ACPI_GPE_CONDITIONAL_ENABLE);
            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 (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags))
    {
    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);
}
Exemple #9
0
ACPI_STATUS
AcpiEvMatchGpeMethod (
    ACPI_HANDLE             ObjHandle,
    UINT32                  Level,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_NAMESPACE_NODE     *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
    ACPI_GPE_WALK_INFO      *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeNumber;
    char                    Name[ACPI_NAME_SIZE + 1];
    UINT8                   Type;


    ACPI_FUNCTION_TRACE (EvMatchGpeMethod);


    /* Check if requested OwnerId matches this OwnerId */

    if ((WalkInfo->ExecuteByOwnerId) &&
        (MethodNode->OwnerId != WalkInfo->OwnerId))
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Match and decode the _Lxx and _Exx GPE method names
     *
     * 1) Extract the method name and null terminate it
     */
    ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
    Name[ACPI_NAME_SIZE] = 0;

    /* 2) Name must begin with an underscore */

    if (Name[0] != '_')
    {
        return_ACPI_STATUS (AE_OK); /* Ignore this method */
    }

    /*
     * 3) Edge/Level determination is based on the 2nd character
     *    of the method name
     */
    switch (Name[1])
    {
    case 'L':

        Type = ACPI_GPE_LEVEL_TRIGGERED;
        break;

    case 'E':

        Type = ACPI_GPE_EDGE_TRIGGERED;
        break;

    default:

        /* Unknown method type, just ignore it */

        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
            "Ignoring unknown GPE method type: %s "
            "(name not of form _Lxx or _Exx)", Name));
        return_ACPI_STATUS (AE_OK);
    }

    /* 4) The last two characters of the name are the hex GPE Number */

    GpeNumber = strtoul (&Name[2], NULL, 16);
    if (GpeNumber == ACPI_UINT32_MAX)
    {
        /* Conversion failed; invalid method, just ignore it */

        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
            "Could not extract GPE number from name: %s "
            "(name is not of form _Lxx or _Exx)", Name));
        return_ACPI_STATUS (AE_OK);
    }

    /* Ensure that we have a valid GPE number for this GPE block */

    GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
    if (!GpeEventInfo)
    {
        /*
         * This GpeNumber is not valid for this GPE block, just ignore it.
         * However, it may be valid for a different GPE block, since GPE0
         * and GPE1 methods both appear under \_GPE.
         */
        return_ACPI_STATUS (AE_OK);
    }

    if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_HANDLER) ||
        (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_RAW_HANDLER))
    {
        /* If there is already a handler, ignore this GPE method */

        return_ACPI_STATUS (AE_OK);
    }

    if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_METHOD)
    {
        /*
         * If there is already a method, ignore this method. But check
         * for a type mismatch (if both the _Lxx AND _Exx exist)
         */
        if (Type != (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
        {
            ACPI_ERROR ((AE_INFO,
                "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
                GpeNumber, GpeNumber, GpeNumber));
        }
        return_ACPI_STATUS (AE_OK);
    }

    /* Disable the GPE in case it's been enabled already. */

    (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);

    /*
     * Add the GPE information from above to the GpeEventInfo block for
     * use during dispatch of this GPE.
     */
    GpeEventInfo->Flags &= ~(ACPI_GPE_DISPATCH_MASK);
    GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_METHOD);
    GpeEventInfo->Dispatch.MethodNode = MethodNode;

    ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
        "Registered GPE method %s as GPE number 0x%.2X\n",
        Name, GpeNumber));
    return_ACPI_STATUS (AE_OK);
}