evgpeblk.c File Reference

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

Include dependency graph for evgpeblk.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EVENTS

Functions
static ACPI_STATUS	AcpiEvInstallGpeBlock (ACPI_GPE_BLOCK_INFO *GpeBlock, UINT32 InterruptNumber)
static ACPI_STATUS	AcpiEvCreateGpeInfoBlocks (ACPI_GPE_BLOCK_INFO *GpeBlock)
ACPI_STATUS	AcpiEvDeleteGpeBlock (ACPI_GPE_BLOCK_INFO *GpeBlock)
ACPI_STATUS	AcpiEvCreateGpeBlock (ACPI_NAMESPACE_NODE *GpeDevice, UINT64 Address, UINT8 SpaceId, UINT32 RegisterCount, UINT16 GpeBlockBaseNumber, UINT32 InterruptNumber, ACPI_GPE_BLOCK_INFO **ReturnGpeBlock)
ACPI_STATUS	AcpiEvInitializeGpeBlock (ACPI_GPE_XRUPT_INFO *GpeXruptInfo, ACPI_GPE_BLOCK_INFO *GpeBlock, void *Context)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 49 of file evgpeblk.c.

Function Documentation

AcpiEvCreateGpeBlock()

ACPI_STATUS AcpiEvCreateGpeBlock	(	ACPI_NAMESPACE_NODE *	GpeDevice,
		UINT64	Address,
		UINT8	SpaceId,
		UINT32	RegisterCount,
		UINT16	GpeBlockBaseNumber,
		UINT32	InterruptNumber,
		ACPI_GPE_BLOCK_INFO **	ReturnGpeBlock
	)

Definition at line 371 of file evgpeblk.c.

{
    ACPI_STATUS             Status;
    ACPI_GPE_BLOCK_INFO     *GpeBlock;
    ACPI_GPE_WALK_INFO      WalkInfo;
 
 
    ACPI_FUNCTION_TRACE (EvCreateGpeBlock);
 
 
    if (!RegisterCount)
    {
        return_ACPI_STATUS (AE_OK);
    }
 
    /* Allocate a new GPE block */
 
    GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO));
    if (!GpeBlock)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    /* Initialize the new GPE block */
 
    GpeBlock->Address = Address;
    GpeBlock->SpaceId = SpaceId;
    GpeBlock->Node = GpeDevice;
    GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH);
    GpeBlock->Initialized = FALSE;
    GpeBlock->RegisterCount = RegisterCount;
    GpeBlock->BlockBaseNumber = GpeBlockBaseNumber;
 
    /*
     * Create the RegisterInfo and EventInfo sub-structures
     * Note: disables and clears all GPEs in the block
     */
    Status = AcpiEvCreateGpeInfoBlocks (GpeBlock);
    if (ACPI_FAILURE (Status))
    {
        ACPI_FREE (GpeBlock);
        return_ACPI_STATUS (Status);
    }
 
    /* Install the new block in the global lists */
 
    Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber);
    if (ACPI_FAILURE (Status))
    {
        ACPI_FREE (GpeBlock->RegisterInfo);
        ACPI_FREE (GpeBlock->EventInfo);
        ACPI_FREE (GpeBlock);
        return_ACPI_STATUS (Status);
    }
 
    AcpiGbl_AllGpesInitialized = FALSE;
 
    /* Find all GPE methods (_Lxx or_Exx) for this block */
 
    WalkInfo.GpeBlock = GpeBlock;
    WalkInfo.GpeDevice = GpeDevice;
    WalkInfo.ExecuteByOwnerId = FALSE;
 
    (void) AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice,
        ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
        AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL);
 
    /* Return the new block */
 
    if (ReturnGpeBlock)
    {
        (*ReturnGpeBlock) = GpeBlock;
    }
 
    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
        "    Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\n",
        (UINT32) GpeBlock->BlockBaseNumber,
        (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)),
        GpeDevice->Name.Ascii, GpeBlock->RegisterCount, InterruptNumber,
        InterruptNumber == AcpiGbl_FADT.SciInterrupt ? " (SCI)" : ""));
 
    /* Update global count of currently available GPEs */
 
    AcpiCurrentGpeCount += GpeBlock->GpeCount;
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiEvGpeInitialize(), and AcpiInstallGpeBlock().

AcpiEvCreateGpeInfoBlocks()

static ACPI_STATUS AcpiEvCreateGpeInfoBlocks ( ACPI_GPE_BLOCK_INFO *  GpeBlock )

static

Definition at line 231 of file evgpeblk.c.

{
    ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo = NULL;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo = NULL;
    ACPI_GPE_EVENT_INFO     *ThisEvent;
    ACPI_GPE_REGISTER_INFO  *ThisRegister;
    UINT32                  i;
    UINT32                  j;
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
 
 
    /* Allocate the GPE register information block */
 
    GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
        (ACPI_SIZE) GpeBlock->RegisterCount *
        sizeof (ACPI_GPE_REGISTER_INFO));
    if (!GpeRegisterInfo)
    {
        ACPI_ERROR ((AE_INFO,
            "Could not allocate the GpeRegisterInfo table"));
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    /*
     * Allocate the GPE EventInfo block. There are eight distinct GPEs
     * per register. Initialization to zeros is sufficient.
     */
    GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
        sizeof (ACPI_GPE_EVENT_INFO));
    if (!GpeEventInfo)
    {
        ACPI_ERROR ((AE_INFO,
            "Could not allocate the GpeEventInfo table"));
        Status = AE_NO_MEMORY;
        goto ErrorExit;
    }
 
    /* Save the new Info arrays in the GPE block */
 
    GpeBlock->RegisterInfo = GpeRegisterInfo;
    GpeBlock->EventInfo = GpeEventInfo;
 
    /*
     * Initialize the GPE Register and Event structures. A goal of these
     * tables is to hide the fact that there are two separate GPE register
     * sets in a given GPE hardware block, the status registers occupy the
     * first half, and the enable registers occupy the second half.
     */
    ThisRegister = GpeRegisterInfo;
    ThisEvent = GpeEventInfo;
 
    for (i = 0; i < GpeBlock->RegisterCount; i++)
    {
        /* Init the RegisterInfo for this GPE register (8 GPEs) */
 
        ThisRegister->BaseGpeNumber = (UINT16)
            (GpeBlock->BlockBaseNumber + (i * ACPI_GPE_REGISTER_WIDTH));
 
        ThisRegister->StatusAddress.Address =
            GpeBlock->Address + i;
 
        ThisRegister->EnableAddress.Address =
            GpeBlock->Address + i + GpeBlock->RegisterCount;
 
        ThisRegister->StatusAddress.SpaceId   = GpeBlock->SpaceId;
        ThisRegister->EnableAddress.SpaceId   = GpeBlock->SpaceId;
        ThisRegister->StatusAddress.BitWidth  = ACPI_GPE_REGISTER_WIDTH;
        ThisRegister->EnableAddress.BitWidth  = ACPI_GPE_REGISTER_WIDTH;
        ThisRegister->StatusAddress.BitOffset = 0;
        ThisRegister->EnableAddress.BitOffset = 0;
 
        /* Init the EventInfo for each GPE within this register */
 
        for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
        {
            ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
            ThisEvent->RegisterInfo = ThisRegister;
            ThisEvent++;
        }
 
        /* Disable all GPEs within this register */
 
        Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
        if (ACPI_FAILURE (Status))
        {
            goto ErrorExit;
        }
 
        /* Clear any pending GPE events within this register */
 
        Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
        if (ACPI_FAILURE (Status))
        {
            goto ErrorExit;
        }
 
        ThisRegister++;
    }
 
    return_ACPI_STATUS (AE_OK);
 
 
ErrorExit:
    if (GpeRegisterInfo)
    {
        ACPI_FREE (GpeRegisterInfo);
    }
    if (GpeEventInfo)
    {
        ACPI_FREE (GpeEventInfo);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvCreateGpeBlock().

AcpiEvDeleteGpeBlock()

ACPI_STATUS AcpiEvDeleteGpeBlock

(

ACPI_GPE_BLOCK_INFO *

GpeBlock

)

Definition at line 148 of file evgpeblk.c.

{
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;
 
 
    ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
 
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Disable all GPEs in this block */
 
    Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock, NULL);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    if (!GpeBlock->Previous && !GpeBlock->Next)
    {
        /* This is the last GpeBlock on this interrupt */
 
        Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock);
        if (ACPI_FAILURE (Status))
        {
            goto UnlockAndExit;
        }
    }
    else
    {
        /* Remove the block on this interrupt with lock */
 
        Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
        if (GpeBlock->Previous)
        {
            GpeBlock->Previous->Next = GpeBlock->Next;
        }
        else
        {
            GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next;
        }
 
        if (GpeBlock->Next)
        {
            GpeBlock->Next->Previous = GpeBlock->Previous;
        }
 
        AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
    }
 
    AcpiCurrentGpeCount -= GpeBlock->GpeCount;
 
    /* Free the GpeBlock */
 
    ACPI_FREE (GpeBlock->RegisterInfo);
    ACPI_FREE (GpeBlock->EventInfo);
    ACPI_FREE (GpeBlock);
 
UnlockAndExit:
    Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiRemoveGpeBlock(), and AcpiUtDeleteInternalObj().

AcpiEvInitializeGpeBlock()

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

Definition at line 481 of file evgpeblk.c.

{
    ACPI_STATUS             Status;
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeEnabledCount;
    UINT32                  GpeIndex;
    UINT32                  i;
    UINT32                  j;
    BOOLEAN                 *IsPollingNeeded = Context;
    ACPI_ERROR_ONLY (UINT32 GpeNumber);
 
 
    ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);
 
 
    /*
     * Ignore a null GPE block (e.g., if no GPE block 1 exists), and
     * any GPE blocks that have been initialized already.
     */
    if (!GpeBlock || GpeBlock->Initialized)
    {
        return_ACPI_STATUS (AE_OK);
    }
 
    /*
     * Enable all GPEs that have a corresponding method and have the
     * ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
     * must be enabled via the acpi_enable_gpe() interface.
     */
    GpeEnabledCount = 0;
 
    for (i = 0; i < GpeBlock->RegisterCount; i++)
    {
        for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
        {
            /* Get the info block for this particular GPE */
 
            GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
            GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
            ACPI_ERROR_ONLY(GpeNumber = GpeBlock->BlockBaseNumber + GpeIndex);
            GpeEventInfo->Flags |= ACPI_GPE_INITIALIZED;
 
            /*
             * Ignore GPEs that have no corresponding _Lxx/_Exx method
             * and GPEs that are used to wake the system
             */
            if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) != ACPI_GPE_DISPATCH_METHOD) ||
                (GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
            {
                continue;
            }
 
            Status = AcpiEvAddGpeReference (GpeEventInfo, FALSE);
            if (ACPI_FAILURE (Status))
            {
                ACPI_EXCEPTION ((AE_INFO, Status,
                    "Could not enable GPE 0x%02X",
                    GpeNumber));
                continue;
            }
 
            GpeEventInfo->Flags |= ACPI_GPE_AUTO_ENABLED;
 
            if (IsPollingNeeded &&
                ACPI_GPE_IS_POLLING_NEEDED (GpeEventInfo))
            {
                *IsPollingNeeded = TRUE;
            }
 
            GpeEnabledCount++;
        }
    }
 
    if (GpeEnabledCount)
    {
        ACPI_INFO ((
            "Enabled %u GPEs in block %02X to %02X", GpeEnabledCount,
            (UINT32) GpeBlock->BlockBaseNumber,
            (UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1))));
    }
 
    GpeBlock->Initialized = TRUE;
    return_ACPI_STATUS (AE_OK);
}

Referenced by AcpiUpdateAllGpes().

AcpiEvInstallGpeBlock()

static ACPI_STATUS AcpiEvInstallGpeBlock ( ACPI_GPE_BLOCK_INFO *  GpeBlock, UINT32  InterruptNumber  )

static

Definition at line 81 of file evgpeblk.c.

{
    ACPI_GPE_BLOCK_INFO     *NextGpeBlock;
    ACPI_GPE_XRUPT_INFO     *GpeXruptBlock;
    ACPI_STATUS             Status;
    ACPI_CPU_FLAGS          Flags;
 
 
    ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
 
 
    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    Status = AcpiEvGetGpeXruptBlock (InterruptNumber, &GpeXruptBlock);
    if (ACPI_FAILURE (Status))
    {
        goto UnlockAndExit;
    }
 
    /* Install the new block at the end of the list with lock */
 
    Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
    if (GpeXruptBlock->GpeBlockListHead)
    {
        NextGpeBlock = GpeXruptBlock->GpeBlockListHead;
        while (NextGpeBlock->Next)
        {
            NextGpeBlock = NextGpeBlock->Next;
        }
 
        NextGpeBlock->Next = GpeBlock;
        GpeBlock->Previous = NextGpeBlock;
    }
    else
    {
        GpeXruptBlock->GpeBlockListHead = GpeBlock;
    }
 
    GpeBlock->XruptBlock = GpeXruptBlock;
    AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
 
 
UnlockAndExit:
    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvCreateGpeBlock().