bool
com_ximeta_driver_NDASProtocolTransport::SendSCSICommand (
SCSITaskIdentifier request,
SCSIServiceResponse * serviceResponse,
SCSITaskStatus * taskStatus
)
{
UInt8 commandLength = 0;
bool commandProcessed = true;
com_ximeta_driver_NDASSCSICommand *NDCmd_ptr = NULL;
SCSICommand scsiCommand;
DbgIOLog(DEBUG_MASK_DISK_TRACE, ("Entered. Request %p\n", request));
*serviceResponse = kSCSIServiceResponse_Request_In_Process;
*taskStatus = kSCSITaskStatus_No_Status;
commandLength = GetCommandDescriptorBlockSize ( request );
#if 0
SCSICommandDescriptorBlock cdb = { 0 };
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("Data Transfer Request %lld\n", GetRequestedDataTransferCount( request )));
GetCommandDescriptorBlock ( request, &cdb );
if ( commandLength == kSCSICDBSize_6Byte )
{
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("cdb = %02x:%02x:%02x:%02x:%02x:%02x\n", cdb[0], cdb[1],
cdb[2], cdb[3], cdb[4], cdb[5] ));
}
else if ( commandLength == kSCSICDBSize_10Byte )
{
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("cdb = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", cdb[0],
cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6], cdb[7], cdb[8],
cdb[9] ));
}
else if ( commandLength == kSCSICDBSize_12Byte )
{
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("cdb = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", cdb[0],
cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6], cdb[7], cdb[8],
cdb[9], cdb[10], cdb[11] ));
}
#endif
request->retain();
if ( isInactive ())
{
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("Device is inactive.\n"));
// device is disconnected - we can not service command request
*serviceResponse = kSCSIServiceResponse_SERVICE_DELIVERY_OR_TARGET_FAILURE;
commandProcessed = false;
goto exit;
}
// Check Workable.
if (!fProvider
|| !fProvider->isWorkable()) {
DbgIOLog(DEBUG_MASK_DISK_WARNING, ("Device is not workable.\n"));
// device is disconnected - we can not service command request
*serviceResponse = kSCSIServiceResponse_SERVICE_DELIVERY_OR_TARGET_FAILURE;
commandProcessed = false;
goto exit;
}
// Check Busy.
// if (fProvider->isBusy() )
if (fBusy)
{
DbgIOLog(DEBUG_MASK_DISK_INFO, ("Busy!!!\n"));
*serviceResponse = kSCSIServiceResponse_SERVICE_DELIVERY_OR_TARGET_FAILURE;
commandProcessed = false;
goto exit;
}
// Allocate Command.
/*
NDCmd_ptr = OSDynamicCast(com_ximeta_driver_NDASSCSICommand,
OSMetaClass::allocClassWithName(NDAS_SCSI_COMMAND_CLASS));
if(NDCmd_ptr == NULL || !NDCmd_ptr->init()) {
DbgIOLog(DEBUG_MASK_DISK_ERROR, ("failed to alloc command class\n"));
if (NDCmd_ptr) {
NDCmd_ptr->release();
}
*serviceResponse = kSCSIServiceResponse_SERVICE_DELIVERY_OR_TARGET_FAILURE;
commandProcessed = true;
goto exit;
}
*/
NDCmd_ptr = (com_ximeta_driver_NDASSCSICommand*)fCommandPool->getCommand(false);
if (NDCmd_ptr == NULL) {
DbgIOLog(DEBUG_MASK_DISK_ERROR, ("No Commands.\n"));
*serviceResponse = kSCSIServiceResponse_SERVICE_DELIVERY_OR_TARGET_FAILURE;
commandProcessed = true;
goto exit;
}
NDCmd_ptr->init();
memset(&scsiCommand, 0, sizeof(SCSICommand));
scsiCommand.scsiTask = request;
// scsiCommand.targetNo = fProvider->targetNo();
scsiCommand.LogicalUnitNumber = GetLogicalUnitNumber( request );
GetCommandDescriptorBlock ( request, &scsiCommand.cdb );
scsiCommand.cdbSize = commandLength;
scsiCommand.MemoryDescriptor_ptr = GetDataBuffer( request );
scsiCommand.BufferOffset = GetDataBufferOffset( request );
scsiCommand.RequestedDataTransferCount = GetRequestedDataTransferCount( request );
scsiCommand.DataTransferDirection = GetDataTransferDirection( request );
// scsiCommand.BlockSize = fProvider->blocksize();
NDCmd_ptr->setCommand(&scsiCommand);
// CriticalCommandSubmission(NDCmd_ptr, &commandProcessed);
fBusy = true;
fCommandGate->runAction ( CriticalCommandSubmissionStatic, NDCmd_ptr);
//fXiCommandGate->runCommand((void *)kNDASProtocolTransportRequestSendCommand, NDCmd_ptr, &commandProcessed);
exit:
if ( kSCSIServiceResponse_Request_In_Process != *serviceResponse ) {
DbgIOLog(DEBUG_MASK_DISK_INFO, ("ERROR Service Response = %x, task = %p\n", *serviceResponse, request));
request->release();
if(NDCmd_ptr) {
NDCmd_ptr->release();
}
}
DbgIOLog(DEBUG_MASK_DISK_INFO,("exit, Service Response = %x, task = %p\n", *serviceResponse, request));
return commandProcessed;
}
SCSIServiceResponse
com_apple_dts_SCSIEmulatorAdapter::ProcessParallelTask ( SCSIParallelTaskIdentifier parallelRequest )
{
// Not all of these may be required. Unused ones are commented out to avoid compiler warnings
SCSITargetIdentifier targetID = GetTargetIdentifier(parallelRequest);
// SCSITaskIdentifier task = GetSCSITaskIdentifier(parallelRequest);
// SCSITaggedTaskIdentifier taggedTask = GetTaggedTaskIdentifier(parallelRequest);
SCSILogicalUnitNumber lun = GetLogicalUnitNumber(parallelRequest);
// SCSITaskAttribute taskAttribute = GetTaskAttribute(parallelRequest);
UInt8 transferDir = GetDataTransferDirection(parallelRequest);
UInt64 transferSize = GetRequestedDataTransferCount(parallelRequest);
IOMemoryDescriptor * transferMemDesc = GetDataBuffer(parallelRequest);
// UInt64 transferMemDescOffset = GetDataBufferOffset(parallelRequest);
// Get the CDB
UInt8 cdbLength = GetCommandDescriptorBlockSize(parallelRequest);
SCSICommandDescriptorBlock cdbData;
SCSITaskStatus scsiStatus = kSCSITaskStatus_GOOD;
UInt64 dataLen = 0;
UInt8 senseBuffer[kSenseBufferLen];
UInt64 senseBufferLen = sizeof(senseBuffer);
com_apple_dts_SCSIEmulator *emulator = (com_apple_dts_SCSIEmulator *)mTargetsArray->getObject(targetID);
// Fail if we don't have a SCSI emulator backing this target
if (!emulator) {
IOLog("ProcessParallelTask: ABORT - !emulator for targetID = %ud\n", targetID);
goto failure_exit;
}
// Fail if we're supposed to transfer data and don't have a data buffer
if (!transferMemDesc && (transferDir != kSCSIDataTransfer_NoDataTransfer)) {
IOLog("ProcessParallelTask: ABORT - !transferMemDesc && (transferDir != kSCSIDataTransfer_NoDataTransfer) - %p and %d\n", transferMemDesc, transferDir);
goto failure_exit;
}
// Fail if we don't have a large enough CDB buffer set aside
if (cdbLength > sizeof(cdbData)) {
IOLog("ProcessParallelTask: ABORT - cdbLength > sizeof(cdbData) - %d vs. %d\n", cdbLength, sizeof(cdbData));
goto failure_exit;
}
if (!GetCommandDescriptorBlock(parallelRequest, &cdbData)) {
IOLog("ProcessParallelTask: ABORT - !GetCommandDescriptorBlock(parallelRequest, &cdbData)\n");
goto failure_exit;
}
if (transferMemDesc && (transferDir != kSCSIDataTransfer_NoDataTransfer)) {
#if 0
// This block isn't necessary as memory descriptors passed in are always autoprepared for us.
// Remember: Any memory descriptors allocated and used internally should be prepared before sending
// or receiving data to/from real hardware
IOReturn res = transferMemDesc->prepare();
if (res != kIOReturnSuccess) {
goto failure_exit;
}
#endif
// We are guaranteed that the memory descriptor will always be sized large enough by
// by SAM/STUC to hold the transfer size requested
dataLen = transferSize;
}
// This is where the "real" work should get done by your hardware. The individual parameters
// are being sent instead of just the task reference as the task is opaque by design and
// the getter/setter methods are protected and available within this class, but not within
// the emulator itself.
emulator->sendCommand(cdbData, cdbLength, transferMemDesc, &dataLen, lun, &scsiStatus, senseBuffer, &senseBufferLen);
// Real hardware should be doing the task processing internally and providing responses
// via an interrupt mechanism. IOSCSIParallelInterfaceController expects this and you
// should always do your task completions from the workloop thread.
CompleteTaskOnWorkloopThread(parallelRequest, true, scsiStatus, dataLen, senseBuffer, senseBufferLen);
return kSCSIServiceResponse_Request_In_Process;
failure_exit:
CompleteTaskOnWorkloopThread(parallelRequest, false, scsiStatus, dataLen, senseBuffer, senseBufferLen);
return kSCSIServiceResponse_Request_In_Process;
}