evgpeutil.c File Reference

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

Include dependency graph for evgpeutil.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EVENTS

Functions
ACPI_STATUS	AcpiEvWalkGpeList (ACPI_GPE_CALLBACK GpeWalkCallback, void *Context)
ACPI_STATUS	AcpiEvGetGpeDevice (ACPI_GPE_XRUPT_INFO *GpeXruptInfo, ACPI_GPE_BLOCK_INFO *GpeBlock, void *Context)
ACPI_STATUS	AcpiEvGetGpeXruptBlock (UINT32 InterruptNumber, ACPI_GPE_XRUPT_INFO **GpeXruptBlock)
ACPI_STATUS	AcpiEvDeleteGpeXrupt (ACPI_GPE_XRUPT_INFO *GpeXrupt)
ACPI_STATUS	AcpiEvDeleteGpeHandlers (ACPI_GPE_XRUPT_INFO *GpeXruptInfo, ACPI_GPE_BLOCK_INFO *GpeBlock, void *Context)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 48 of file evgpeutil.c.

Function Documentation

AcpiEvDeleteGpeHandlers()

ACPI_STATUS AcpiEvDeleteGpeHandlers	(	ACPI_GPE_XRUPT_INFO *	GpeXruptInfo,
		ACPI_GPE_BLOCK_INFO *	GpeBlock,
		void *	Context
	)

Definition at line 339 of file evgpeutil.c.

{
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    ACPI_GPE_NOTIFY_INFO    *Notify;
    ACPI_GPE_NOTIFY_INFO    *Next;
    UINT32                  i;
    UINT32                  j;


    ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers);


    /* Examine each GPE Register within the block */

    for (i = 0; i < GpeBlock->RegisterCount; i++)
    {
        /* Now look at the individual GPEs in this byte register */

        for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
        {
            GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
                ACPI_GPE_REGISTER_WIDTH) + j];

            if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
                    ACPI_GPE_DISPATCH_HANDLER) ||
                (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
                    ACPI_GPE_DISPATCH_RAW_HANDLER))
            {
                /* Delete an installed handler block */

                ACPI_FREE (GpeEventInfo->Dispatch.Handler);
                GpeEventInfo->Dispatch.Handler = NULL;
                GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
            }
            else if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
                ACPI_GPE_DISPATCH_NOTIFY)
            {
                /* Delete the implicit notification device list */

                Notify = GpeEventInfo->Dispatch.NotifyList;
                while (Notify)
                {
                    Next = Notify->Next;
                    ACPI_FREE (Notify);
                    Notify = Next;
                }

                GpeEventInfo->Dispatch.NotifyList = NULL;
                GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
            }
        }
    }

    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvTerminate().

AcpiEvDeleteGpeXrupt()

ACPI_STATUS AcpiEvDeleteGpeXrupt

(

ACPI_GPE_XRUPT_INFO *

GpeXrupt

)

Definition at line 270 of file evgpeutil.c.

{
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;


    ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt);


    /* We never want to remove the SCI interrupt handler */

    if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt)
    {
        GpeXrupt->GpeBlockListHead = NULL;
        return_ACPI_STATUS (AE_OK);
    }

    /* Disable this interrupt */

    Status = AcpiOsRemoveInterruptHandler (
        GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Unlink the interrupt block with lock */

    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    if (GpeXrupt->Previous)
    {
        GpeXrupt->Previous->Next = GpeXrupt->Next;
    }
    else
    {
        /* No previous, update list head */

        AcpiGbl_GpeXruptListHead = GpeXrupt->Next;
    }

    if (GpeXrupt->Next)
    {
        GpeXrupt->Next->Previous = GpeXrupt->Previous;
    }
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);

    /* Free the block */

    ACPI_FREE (GpeXrupt);
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvDeleteGpeBlock().

AcpiEvGetGpeDevice()

ACPI_STATUS AcpiEvGetGpeDevice	(	ACPI_GPE_XRUPT_INFO *	GpeXruptInfo,
		ACPI_GPE_BLOCK_INFO *	GpeBlock,
		void *	Context
	)

Definition at line 130 of file evgpeutil.c.

{
    ACPI_GPE_DEVICE_INFO    *Info = Context;


    /* Increment Index by the number of GPEs in this block */

    Info->NextBlockBaseIndex += GpeBlock->GpeCount;

    if (Info->Index < Info->NextBlockBaseIndex)
    {
        /*
         * The GPE index is within this block, get the node. Leave the node
         * NULL for the FADT-defined GPEs
         */
        if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)
        {
            Info->GpeDevice = GpeBlock->Node;
        }

        Info->Status = AE_OK;
        return (AE_CTRL_END);
    }

    return (AE_OK);
}

Referenced by AcpiGetGpeDevice().

AcpiEvGetGpeXruptBlock()

ACPI_STATUS AcpiEvGetGpeXruptBlock	(	UINT32	InterruptNumber,
		ACPI_GPE_XRUPT_INFO **	GpeXruptBlock
	)

Definition at line 178 of file evgpeutil.c.

{
    ACPI_GPE_XRUPT_INFO     *NextGpeXrupt;
    ACPI_GPE_XRUPT_INFO     *GpeXrupt;
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;


    ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock);


    /* No need for lock since we are not changing any list elements here */

    NextGpeXrupt = AcpiGbl_GpeXruptListHead;
    while (NextGpeXrupt)
    {
        if (NextGpeXrupt->InterruptNumber == InterruptNumber)
        {
            *GpeXruptBlock = NextGpeXrupt;
            return_ACPI_STATUS (AE_OK);
        }

        NextGpeXrupt = NextGpeXrupt->Next;
    }

    /* Not found, must allocate a new xrupt descriptor */

    GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO));
    if (!GpeXrupt)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    GpeXrupt->InterruptNumber = InterruptNumber;

    /* Install new interrupt descriptor with spin lock */

    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    if (AcpiGbl_GpeXruptListHead)
    {
        NextGpeXrupt = AcpiGbl_GpeXruptListHead;
        while (NextGpeXrupt->Next)
        {
            NextGpeXrupt = NextGpeXrupt->Next;
        }

        NextGpeXrupt->Next = GpeXrupt;
        GpeXrupt->Previous = NextGpeXrupt;
    }
    else
    {
        AcpiGbl_GpeXruptListHead = GpeXrupt;
    }

    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);

    /* Install new interrupt handler if not SCI_INT */

    if (InterruptNumber != AcpiGbl_FADT.SciInterrupt)
    {
        Status = AcpiOsInstallInterruptHandler (InterruptNumber,
            AcpiEvGpeXruptHandler, GpeXrupt);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "Could not install GPE interrupt handler at level 0x%X",
                InterruptNumber));
            return_ACPI_STATUS (Status);
        }
    }

    *GpeXruptBlock = GpeXrupt;
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvInstallGpeBlock().

AcpiEvWalkGpeList()

ACPI_STATUS AcpiEvWalkGpeList	(	ACPI_GPE_CALLBACK	GpeWalkCallback,
		void *	Context
	)

Definition at line 67 of file evgpeutil.c.

{
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_GPE_XRUPT_INFO     *GpeXruptInfo;
    ACPI_STATUS             Status = AE_OK;
    ACPI_CPU_FLAGS          Flags;


    ACPI_FUNCTION_TRACE (EvWalkGpeList);


    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);

    /* Walk the interrupt level descriptor list */

    GpeXruptInfo = AcpiGbl_GpeXruptListHead;
    while (GpeXruptInfo)
    {
        /* Walk all Gpe Blocks attached to this interrupt level */

        GpeBlock = GpeXruptInfo->GpeBlockListHead;
        while (GpeBlock)
        {
            /* One callback per GPE block */

            Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context);
            if (ACPI_FAILURE (Status))
            {
                if (Status == AE_CTRL_END) /* Callback abort */
                {
                    Status = AE_OK;
                }
                goto UnlockAndExit;
            }

            GpeBlock = GpeBlock->Next;
        }

        GpeXruptInfo = GpeXruptInfo->Next;
    }

UnlockAndExit:
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvTerminate(), AcpiGetGpeDevice(), AcpiHwCheckAllGpes(), AcpiHwClearAcpiStatus(), AcpiHwDisableAllGpes(), AcpiHwEnableAllRuntimeGpes(), AcpiHwEnableAllWakeupGpes(), and AcpiUpdateAllGpes().