///////////////////////////////////////////////////////////////////////
//
// Tx buffer operations
//
internal void PopulateTsmtBuffer(PacketFifo fromUser)
{
DebugStub.Assert(this.ioRunning);
// since no transmit interrupts are sent, we must check for
// transmission events here
if (txRingBuffer.NewTransmitEvent())
{
NicEventType ev = NicEventType.TransmitEvent;
if (eventRelay != null)
{
eventRelay.ForwardEvent(ev);
}
}
using (txRingBuffer.thisLock.Lock()) {
while (fromUser.Count > 0)
{
Packet packet = fromUser.Pop();
txRingBuffer.LockedPushTsmtBuffer(packet);
}
// update hardware tail pointer
// so that hardware knows it has new packets to transmit
Write32(Register.TSMT_DESC_TAIL, txRingBuffer.Head); // sw head is hw tail
}
}
private bool HandleInterrupts(uint intrCause)
{
if (intrCause == 0)
{
//TODO: return false;
}
//DebugPrint("HandleInterrupts ???\n");
NicEventType ev = NicEventType.NoEvent;
if ((intrCause & InterruptMasks.LSC) != 0)
{
DebugPrint("Link Status Change\n");
ev |= NicEventType.LinkEvent;
}
if ((intrCause & InterruptMasks.RXSEQ) != 0)
{
DebugPrint("Sequence Error\n");
ev |= NicEventType.LinkEvent;
}
if (((InterruptMasks.RXT0 |
InterruptMasks.RXO |
InterruptMasks.RXDMT0) & intrCause) != 0)
{
ev |= NicEventType.ReceiveEvent;
}
// no transmit interupts are set, check rxbuffer to see
// if any packets have been sent since last time
if (txRingBuffer.NewTransmitEvent())
{
ev |= NicEventType.TransmitEvent;
}
// TODO: not necessary
if (rxRingBuffer.NewReceiveEvent())
{
ev |= NicEventType.ReceiveEvent;
}
if (ev == NicEventType.NoEvent)
{
// DebugPrint("HandleInterrupt: no event\n");
return(false);
}
if (eventRelay != null)
{
eventRelay.ForwardEvent(ev);
}
else
{
DebugPrint("event relay is NULL!\n");
}
return(true);
}
internal void ForwardEvent(NicEventType theEvent)
{
// DebugStub.Print("EventRelay:ForwardEvent\n");
if (channelClosed)
{
DebugStub.Print("unexpectedly closed\n");
return;
}
NicDeviceEventContract /*.Exp*/ exp = (NicDeviceEventContract)channel.Acquire();
try {
exp.NicDeviceEvent(theEvent);
}
finally {
channel.Release(exp);
}
}
public void NicDeviceEvent(NicEventType eventType)
{
if ((eventType & NicEventType.ReceiveEvent) != 0)
{
DeMuxReceivedPackets();
}
else
{
if ((eventType & NicEventType.TransmitEvent) != 0)
{
this.muxEvent.Set();
//DebugStub.Print("Received transmit event\n");
}
if ((eventType & NicEventType.LinkEvent) != 0)
{
//DebugStub.Print("UNHANDLED link event!...acking anyway\n");
}
}
}
