NTSTATUS
NICWritePacket(
IN PFDO_DATA FdoData,
IN WDFDMATRANSACTION DmaTransaction,
IN PSCATTER_GATHER_LIST SGList
)
/*++
Routine Description:
Do the work to send a packet
Assumption: This function is called with the Send SPINLOCK held.
Arguments:
FdoData Pointer to our FdoData
Return Value:
--*/
{
PMP_TCB pMpTcb = NULL;
NTSTATUS status;
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_WRITE,
"--> NICWritePacket: SGList %p\n", SGList);
//
// Initialize the Transfer Control Block.
//
pMpTcb = FdoData->CurrSendTail;
ASSERT(!MP_TEST_FLAG(pMpTcb, fMP_TCB_IN_USE));
pMpTcb->DmaTransaction = DmaTransaction;
MP_SET_FLAG(pMpTcb, fMP_TCB_IN_USE);
//
// Call the send handler, it only needs to deal with the ScatterGather list
//
status = NICSendPacket(FdoData, pMpTcb, SGList);
if(!NT_SUCCESS(status)){
MP_CLEAR_FLAG(pMpTcb, fMP_TCB_IN_USE);
return status;
}
FdoData->nBusySend++;
ASSERT(FdoData->nBusySend <= FdoData->NumTcb);
FdoData->CurrSendTail = FdoData->CurrSendTail->Next;
TraceEvents(TRACE_LEVEL_VERBOSE, DBG_WRITE, "<-- NICWritePacket\n");
return status;
}
VOID
NICWritePacket(
__in PFDO_DATA FdoData,
__in PIRP Irp,
__in BOOLEAN bFromQueue
)
/*++
Routine Description:
Do the work to send a packet
Assumption: Send spinlock has been acquired
Arguments:
FdoData Pointer to our FdoData
Packet The packet
bFromQueue TRUE if it's taken from the send wait queue
Return Value:
--*/
{
PMP_TCB pMpTcb = NULL;
ULONG packetLength;
PVOID virtualAddress;
DebugPrint(TRACE, DBG_WRITE, "--> NICWritePacket, Irp= %p\n", Irp);
//
// Get the next free TCB and initialize it to represent the
// request buffer.
//
pMpTcb = FdoData->CurrSendTail;
ASSERT(!MP_TEST_FLAG(pMpTcb, fMP_TCB_IN_USE));
//
// If the adapter is not ready, fail the request.
//
if(MP_IS_NOT_READY(FdoData)) {
MP_FREE_SEND_PACKET(FdoData, pMpTcb, STATUS_DEVICE_NOT_READY);
return;
}
pMpTcb->FirstBuffer = Irp->MdlAddress;
virtualAddress = MmGetMdlVirtualAddress(Irp->MdlAddress);
pMpTcb->BufferCount = 1;
pMpTcb->PacketLength = packetLength = MmGetMdlByteCount(Irp->MdlAddress);
pMpTcb->PhysBufCount = ADDRESS_AND_SIZE_TO_SPAN_PAGES(virtualAddress,
packetLength);
pMpTcb->Irp = Irp;
MP_SET_FLAG(pMpTcb, fMP_TCB_IN_USE);
//
// Call the send handler, it only needs to deal with the frag list
//
NICSendPacket(FdoData, pMpTcb, Irp->Tail.Overlay.DriverContext[3]);
FdoData->nBusySend++;
ASSERT(FdoData->nBusySend <= FdoData->NumTcb);
FdoData->CurrSendTail = FdoData->CurrSendTail->Next;
DebugPrint(TRACE, DBG_WRITE, "<-- NICWritePacket\n");
return;
}
