NTSTATUS
ScsiPortPdoScsi(
IN PDEVICE_OBJECT Pdo,
IN PIRP Irp
)
/*++
Routine Description:
This routine dispatches SRB's for a particular target device. It will fill
in the Port, Path, Target and Lun values and then forward the request
through to the FDO for the bus
Arguments:
Pdo - a pointer to the physical device object
Irp - a pointer to the io request packet
Return Value:
status
--*/
{
PLOGICAL_UNIT_EXTENSION lun = Pdo->DeviceExtension;
PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
#if DBG
PDRIVER_OBJECT lowerDriverObject =
lun->CommonExtension.LowerDeviceObject->DriverObject;
#endif
PSCSI_REQUEST_BLOCK srb = irpStack->Parameters.Scsi.Srb;
ULONG isRemoved;
PSRB_DATA srbData;
BOOLEAN isLock = FALSE;
NTSTATUS status;
isRemoved = SpAcquireRemoveLock(Pdo, Irp);
if(isRemoved &&
!IS_CLEANUP_REQUEST(irpStack) &&
(srb->Function != SRB_FUNCTION_CLAIM_DEVICE)) {
Irp->IoStatus.Status = STATUS_DEVICE_DOES_NOT_EXIST;
SpReleaseRemoveLock(Pdo, Irp);
SpCompleteRequest(Pdo, Irp, NULL, IO_NO_INCREMENT);
return STATUS_DEVICE_DOES_NOT_EXIST;
}
srb->PathId = lun->PathId;
srb->TargetId = lun->TargetId;
srb->Lun = lun->Lun;
//
// NOTICE: The SCSI-II specification indicates that this field should be
// zero; however, some target controllers ignore the logical unit number
// in the INDENTIFY message and only look at the logical unit number field
// in the CDB.
//
srb->Cdb[1] |= srb->Lun << 5;
//
// Queue tags should be assigned only by the StartIo routine. Set it to
// a benign value here so we can tell later on that we don't have to
// clear the tag value in the bitmap.
//
srb->QueueTag = SP_UNTAGGED;
#if DBG
ASSERT(lowerDriverObject->MajorFunction[IRP_MJ_SCSI] != NULL);
ASSERT(lowerDriverObject->MajorFunction[IRP_MJ_SCSI] == ScsiPortGlobalDispatch);
#endif
switch(srb->Function) {
case SRB_FUNCTION_ABORT_COMMAND: {
//
// BUGBUG - abort is broken. We'll need to either yank it out
// or figure out how to recode it internally. Abort commands
// are going to need their own SRB_DATA structure since that
// contains the pointer back to the original irp.
//
ASSERT(FALSE);
status = STATUS_NOT_SUPPORTED;
break;
}
case SRB_FUNCTION_CLAIM_DEVICE:
case SRB_FUNCTION_REMOVE_DEVICE: {
status = SpClaimLogicalUnit(
lun->CommonExtension.LowerDeviceObject->DeviceExtension,
lun,
Irp,
FALSE);
break;
}
case SRB_FUNCTION_UNLOCK_QUEUE:
case SRB_FUNCTION_LOCK_QUEUE: {
BOOLEAN lock;
lock = (srb->Function == SRB_FUNCTION_LOCK_QUEUE);
//
// This srb function is only valid as part of a power up request
// and will be ignored if the power state is D0.
//
DebugPrint((2, "ScsiPortPdoScsi: called to %s queue %#p\n",
lock ? "lock" : "unlock",
lun));
ASSERT(lun->LockRequest == NULL);
CLEAR_FLAG(srb->SrbFlags, SRB_FLAGS_QUEUE_ACTION_ENABLE);
SET_FLAG(srb->SrbFlags, SRB_FLAGS_BYPASS_LOCKED_QUEUE);
isLock = TRUE;
//
// Throw this request down so it gets processed as a real
// request. We need to get the completion dpc to start
// things running again. there are too many flags to set
// to do it from here.
//
DebugPrint((2, "ScsiPortPdoScsi: %s %#p into "
"queue %#p ... issuing request\n",
lock ? "lock" : "unlock", srb, lun));
srbData = SpAllocateBypassSrbData(lun);
ASSERT(srbData != NULL);
goto RunSrb;
}
case SRB_FUNCTION_RELEASE_QUEUE:
case SRB_FUNCTION_FLUSH_QUEUE: {
srbData = SpAllocateBypassSrbData(lun);
ASSERT(srbData != NULL);
goto RunSrb;
}
default: {
if(TEST_FLAG(srb->SrbFlags, (SRB_FLAGS_BYPASS_LOCKED_QUEUE |
SRB_FLAGS_BYPASS_FROZEN_QUEUE))) {
srbData = SpAllocateBypassSrbData(lun);
ASSERT(srbData != NULL);
} else {
srbData = SpAllocateSrbData( lun->AdapterExtension, Irp);
if(srbData == NULL) {
//
// There wasn't an SRB_DATA block available for this
// request so it's been queued waiting for resources -
// leave the logical unit remove-locked and return pending.
//
DebugPrint((1, "ScsiPortPdoScsi: Insufficient resources "
"to allocate SRB_DATA structure\n"));
return STATUS_PENDING;
}
}
RunSrb:
srbData->CurrentIrp = Irp;
srbData->CurrentSrb = srb;
srbData->LogicalUnit = lun;
srb->OriginalRequest = srbData;
return SpDispatchRequest(lun, Irp);
}
}
Irp->IoStatus.Status = status;
SpReleaseRemoveLock(Pdo, Irp);
SpCompleteRequest(Pdo, Irp, NULL, IO_NO_INCREMENT);
return status;
}
NTSTATUS
NTAPI
ClassCreateClose(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
SCSI class driver create and close routine. This is called by the I/O system
when the device is opened or closed.
Arguments:
DriverObject - Pointer to driver object created by system.
Irp - IRP involved.
Return Value:
Device-specific drivers return value or STATUS_SUCCESS.
--*/
{
PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
ULONG removeState;
NTSTATUS status;
PAGED_CODE();
//
// If we're getting a close request then we know the device object hasn't
// been completely destroyed. Let the driver cleanup if necessary.
//
removeState = ClassAcquireRemoveLock(DeviceObject, Irp);
//
// Invoke the device-specific routine, if one exists. Otherwise complete
// with SUCCESS
//
if((removeState == NO_REMOVE) ||
IS_CLEANUP_REQUEST(IoGetCurrentIrpStackLocation(Irp)->MajorFunction)) {
status = ClasspCreateClose(DeviceObject, Irp);
if((NT_SUCCESS(status)) &&
(commonExtension->DevInfo->ClassCreateClose)) {
return commonExtension->DevInfo->ClassCreateClose(DeviceObject, Irp);
}
} else {
status = STATUS_DEVICE_DOES_NOT_EXIST;
}
Irp->IoStatus.Status = status;
ClassReleaseRemoveLock(DeviceObject, Irp);
ClassCompleteRequest(DeviceObject, Irp, IO_NO_INCREMENT);
return status;
}