asyncapi.c

winddk src目录下的WDM源码压缩!

    // will be issued from KernelMode
    //
    if (Irp->RequestorMode == UserMode) {

        newIrp = IoBuildDeviceIoControlRequest (IOCTL_1394_CLASS, NextDeviceObject, 
                            NULL, 0, NULL, 0, TRUE, &Event, &ioStatus);

        if (!newIrp) {

            TRACE(TL_ERROR, ("Failed to allocate newIrp!\n"));
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
            goto Exit_AsyncWrite;            
        }
        allocNewIrp = TRUE;
    }

    pIrb = ExAllocatePool(NonPagedPool, sizeof(IRB));

    if (!pIrb) {

        TRACE(TL_ERROR, ("Failed to allocate pIrb!\n"));
        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        goto Exit_AsyncWrite;
    } // if

    RtlZeroMemory (pIrb, sizeof (IRB));
    pIrb->FunctionNumber = REQUEST_ASYNC_WRITE;
    pIrb->Flags = 0;
    pIrb->u.AsyncWrite.DestinationAddress = DestinationAddress;
    pIrb->u.AsyncWrite.nNumberOfBytesToWrite = nNumberOfBytesToWrite;
    pIrb->u.AsyncWrite.nBlockSize = nBlockSize;
    pIrb->u.AsyncWrite.fulFlags = fulFlags;

    if (bGetGeneration) {
    
        pIrb->u.AsyncRead.ulGeneration = deviceExtension->GenerationCount;
        TRACE(TL_TRACE, ("Retrieved Generation Count = 0x%x\n", pIrb->u.AsyncRead.ulGeneration));
    }
    else {
        pIrb->u.AsyncRead.ulGeneration = ulGeneration;
    }
    
    pMdl = IoAllocateMdl (Data,
                          nNumberOfBytesToWrite,
                          FALSE,
                          FALSE,
                          NULL);
    
    MmBuildMdlForNonPagedPool(pMdl);

    pIrb->u.AsyncWrite.Mdl = pMdl;

    //
    // If we allocated this irp, submit it asynchronously and wait for its
    // completion event to be signaled.  Otherwise submit it synchronously
    //
    if (allocNewIrp) {

        KeInitializeEvent (&Event, NotificationEvent, FALSE);
        ntStatus = t1394_SubmitIrpAsync (NextDeviceObject, newIrp, pIrb);

        if (ntStatus == STATUS_PENDING) {
            KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL); 
            ntStatus = ioStatus.Status;
        }
    }
    else {
    
        ntStatus = t1394_SubmitIrpSynch(NextDeviceObject, Irp, pIrb);
    }
    
    if (!NT_SUCCESS(ntStatus)) {

        TRACE(TL_ERROR, ("SubmitIrpSync failed = 0x%x\n", ntStatus));

        if (ntStatus != STATUS_INVALID_GENERATION) {
        }
    }
    else {

    }


Exit_AsyncWrite:

    if (pMdl)
    {
        IoFreeMdl(pMdl);
    }
    
    if (pIrb)
    {
        ExFreePool(pIrb);
    }

    if (allocNewIrp) 
    {
       Irp->IoStatus = ioStatus;
    }
    
    EXIT("t1394_AsyncWrite", ntStatus);
    return(ntStatus);
} // t1394_AsyncWrite

NTSTATUS
t1394_AsyncLock(
    IN PDEVICE_OBJECT   DeviceObject,
    IN PIRP             Irp,
    IN ULONG            bRawMode,
    IN ULONG            bGetGeneration,
    IN IO_ADDRESS       DestinationAddress,
    IN ULONG            nNumberOfArgBytes,
    IN ULONG            nNumberOfDataBytes,
    IN ULONG            fulTransactionType,
    IN ULONG            fulFlags,
    IN ULONG            Arguments[2],
    IN ULONG            DataValues[2],
    IN ULONG            ulGeneration,
    IN OUT PVOID        Buffer
    )
{
    NTSTATUS            ntStatus            = STATUS_SUCCESS;
    PDEVICE_EXTENSION   deviceExtension     = DeviceObject->DeviceExtension;
    PIRB                pIrb                = NULL;
    PDEVICE_OBJECT      NextDeviceObject    = NULL;
    PIRP                newIrp              = NULL;
    BOOLEAN             allocNewIrp         = FALSE;
    KEVENT              Event;
    IO_STATUS_BLOCK     ioStatus;
    
    ENTER("t1394_AsyncLock");

    TRACE(TL_TRACE, ("bRawMode = %d\n", bRawMode));
    TRACE(TL_TRACE, ("bGetGeneration = %d\n", bGetGeneration));
    TRACE(TL_TRACE, ("DestinationAddress.IA_Destination_ID.NA_Bus_Number = 0x%x\n", DestinationAddress.IA_Destination_ID.NA_Bus_Number));
    TRACE(TL_TRACE, ("DestinationAddress.IA_Destination_ID.NA_Node_Number = 0x%x\n", DestinationAddress.IA_Destination_ID.NA_Node_Number));
    TRACE(TL_TRACE, ("DestinationAddress.IA_Destination_Offset.Off_High = 0x%x\n", DestinationAddress.IA_Destination_Offset.Off_High));
    TRACE(TL_TRACE, ("DestinationAddress.IA_Destination_Offset.Off_Low = 0x%x\n", DestinationAddress.IA_Destination_Offset.Off_Low));
    TRACE(TL_TRACE, ("nNumberOfArgBytes = 0x%x\n", nNumberOfArgBytes));
    TRACE(TL_TRACE, ("nNumberOfDataBytes = 0x%x\n", nNumberOfDataBytes));
    TRACE(TL_TRACE, ("fulTransactionType = 0x%x\n", fulTransactionType));
    TRACE(TL_TRACE, ("fulFlags = 0x%x\n", fulFlags));
    TRACE(TL_TRACE, ("Arguments[0] = 0x%x\n", Arguments[0]));
    TRACE(TL_TRACE, ("Arguments[1] = 0x%x\n", Arguments[1]));
    TRACE(TL_TRACE, ("DataValues[0] = 0x%x\n", DataValues[0]));
    TRACE(TL_TRACE, ("DataValues[1] = 0x%x\n", DataValues[1]));
    TRACE(TL_TRACE, ("ulGeneration = 0x%x\n", ulGeneration));
    TRACE(TL_TRACE, ("Buffer = 0x%x\n", Buffer));

    //
    // get the location of the next device object in the stack
    //
    if (bRawMode) {
        NextDeviceObject = deviceExtension->PortDeviceObject;
    }
    else {
        NextDeviceObject = deviceExtension->StackDeviceObject;
    }

    //
    // If this is a UserMode request create a newIrp so that the request
    // will be issued from KernelMode
    //
    if (Irp->RequestorMode == UserMode) {

        newIrp = IoBuildDeviceIoControlRequest (IOCTL_1394_CLASS, NextDeviceObject, 
                            NULL, 0, NULL, 0, TRUE, &Event, &ioStatus);

        if (!newIrp) {

            TRACE(TL_ERROR, ("Failed to allocate newIrp!\n"));
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
            goto Exit_AsyncLock;            
        }
        allocNewIrp = TRUE;
    }

    pIrb = ExAllocatePool(NonPagedPool, sizeof(IRB));

    if (!pIrb) {

        TRACE(TL_ERROR, ("Failed to allocate pIrb!\n"));
        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        goto Exit_AsyncLock;
    } // if

    RtlZeroMemory (pIrb, sizeof (IRB));
    pIrb->FunctionNumber = REQUEST_ASYNC_LOCK;
    pIrb->Flags = 0;
    pIrb->u.AsyncLock.DestinationAddress = DestinationAddress;
    pIrb->u.AsyncLock.nNumberOfArgBytes = nNumberOfArgBytes;
    pIrb->u.AsyncLock.nNumberOfDataBytes = nNumberOfDataBytes;
    pIrb->u.AsyncLock.fulTransactionType = fulTransactionType;
    pIrb->u.AsyncLock.fulFlags = fulFlags;
    pIrb->u.AsyncLock.Arguments[0] = Arguments[0];
    pIrb->u.AsyncLock.Arguments[1] = Arguments[1];
    pIrb->u.AsyncLock.DataValues[0] = DataValues[0];
    pIrb->u.AsyncLock.DataValues[1] = DataValues[1];
    pIrb->u.AsyncLock.pBuffer = Buffer;

    if (bGetGeneration) {
    
        pIrb->u.AsyncLock.ulGeneration = deviceExtension->GenerationCount;
        TRACE(TL_TRACE, ("Retrieved Generation Count = 0x%x\n", pIrb->u.AsyncLock.ulGeneration));
    }
    else {
        pIrb->u.AsyncLock.ulGeneration = ulGeneration;
    }

    //
    // If we allocated this irp, submit it asynchronously and wait for its
    // completion event to be signaled.  Otherwise submit it synchronously
    //
    if (allocNewIrp) {

        KeInitializeEvent (&Event, NotificationEvent, FALSE);
        ntStatus = t1394_SubmitIrpAsync (NextDeviceObject, newIrp, pIrb);

        if (ntStatus == STATUS_PENDING) {
            KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL); 
            ntStatus = ioStatus.Status;
        }
    }
    else {
    
        ntStatus = t1394_SubmitIrpSynch(NextDeviceObject, Irp, pIrb);
    }
    
    if (!NT_SUCCESS(ntStatus)) {

        TRACE(TL_ERROR, ("SubmitIrpSync failed = 0x%x\n", ntStatus));

        if (ntStatus != STATUS_INVALID_GENERATION) {
        }
    }


Exit_AsyncLock:

    if (pIrb)
    {
        ExFreePool(pIrb);
    }

    if (allocNewIrp) 
    {
        Irp->IoStatus = ioStatus;
    }
    
    EXIT("t1394_AsyncLock", ntStatus);
    return(ntStatus);
} // t1394_AsyncLock

NTSTATUS
t1394_AsyncStream(
    IN PDEVICE_OBJECT   DeviceObject,
    IN PIRP             Irp,
    IN ULONG            nNumberOfBytesToStream,
    IN ULONG            fulFlags,
    IN ULONG            ulTag,
    IN ULONG            nChannel,
    IN ULONG            ulSynch,
    IN UCHAR            nSpeed,
    IN OUT PULONG       Data
    )
{
    NTSTATUS            ntStatus        = STATUS_SUCCESS;
    PDEVICE_EXTENSION   deviceExtension = DeviceObject->DeviceExtension;
    PIRB                pIrb            = NULL;
    PMDL                pMdl            = NULL;
    PIRP                newIrp          = NULL;
    BOOLEAN             allocNewIrp     = FALSE;
    KEVENT              Event;
    IO_STATUS_BLOCK     ioStatus;
    
    ENTER("t1394_AsyncStream");

    TRACE(TL_TRACE, ("nNumberOfBytesToStream = 0x%x\n", nNumberOfBytesToStream));
    TRACE(TL_TRACE, ("fulFlags = 0x%x\n", fulFlags));
    TRACE(TL_TRACE, ("ulTag = 0x%x\n", ulTag));
    TRACE(TL_TRACE, ("nChannel = 0x%x\n", nChannel));
    TRACE(TL_TRACE, ("ulSynch = 0x%x\n", ulSynch));
    TRACE(TL_TRACE, ("nSpeed = 0x%x\n", nSpeed));

    if (nNumberOfBytesToStream == 0) {

        TRACE(TL_ERROR, ("Invalid nNumberOfBytesToStream size!\n"));
        ntStatus = STATUS_INVALID_PARAMETER;
        goto Exit_AsyncStream;
    }
    //
    // If this is a UserMode request create a newIrp so that the request
    // will be issued from KernelMode
    //
    if (Irp->RequestorMode == UserMode) {

        newIrp = IoBuildDeviceIoControlRequest (IOCTL_1394_CLASS, deviceExtension->StackDeviceObject, 
                            NULL, 0, NULL, 0, TRUE, &Event, &ioStatus);

        if (!newIrp) {

            TRACE(TL_ERROR, ("Failed to allocate newIrp!\n"));        
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
            goto Exit_AsyncStream;            
        }
        allocNewIrp = TRUE;
    }
    
    pIrb = ExAllocatePool(NonPagedPool, sizeof(IRB));

    if (!pIrb) {

        TRACE(TL_ERROR, ("Failed to allocate pIrb!\n"));
        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        goto Exit_AsyncStream;
    } // if

    RtlZeroMemory (pIrb, sizeof (IRB));
    pIrb->FunctionNumber = REQUEST_ASYNC_STREAM;
    pIrb->Flags = 0;
    pIrb->u.AsyncStream.nNumberOfBytesToStream = nNumberOfBytesToStream;
    pIrb->u.AsyncStream.fulFlags = fulFlags;
    pIrb->u.AsyncStream.ulTag = ulTag;
    pIrb->u.AsyncStream.nChannel = nChannel;
    pIrb->u.AsyncStream.ulSynch = ulSynch;
    pIrb->u.AsyncStream.nSpeed = nSpeed;
    
    pMdl = IoAllocateMdl (Data,
                          nNumberOfBytesToStream,
                          FALSE,
                          FALSE,
                          NULL);

    if (!pMdl) {

        TRACE(TL_ERROR, ("Failed to allocate pMdl!\n"));
        ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        goto Exit_AsyncStream;    
    }
    
    MmBuildMdlForNonPagedPool(pMdl);

    pIrb->u.AsyncStream.Mdl = pMdl;

    //
    // If we allocated this irp, submit it asynchronously and wait for its
    // completion event to be signaled.  Otherwise submit it synchronously
    //
    if (allocNewIrp) {

        KeInitializeEvent (&Event, NotificationEvent, FALSE);
        ntStatus = t1394_SubmitIrpAsync (deviceExtension->StackDeviceObject, newIrp, pIrb);

        if (ntStatus == STATUS_PENDING) {
            KeWaitForSingleObject (&Event, Executive, KernelMode, FALSE, NULL); 
            ntStatus = ioStatus.Status;
        }
    }
    else {
        ntStatus = t1394_SubmitIrpSynch(deviceExtension->StackDeviceObject, Irp, pIrb);
    }
    
    if (!NT_SUCCESS(ntStatus)) {

        TRACE(TL_ERROR, ("SubmitIrpSync failed = 0x%x\n", ntStatus));
    }

Exit_AsyncStream:

    if (pMdl)
    {
        IoFreeMdl(pMdl);
    }

    if (pIrb)
    {
        ExFreePool(pIrb);
    }

    if (allocNewIrp) 
    {
        Irp->IoStatus = ioStatus;
    }
    
    EXIT("t1394_AsyncStream", ntStatus);   
    return(ntStatus);
} // t1394_AsyncStream