RCM6750 stops responding to ethernet traffic?

Rabbit
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1

I’m using DC10.72 from the github site (10.72A). If I send an icmp flood to the unit, it stops responding to any kind of other traffic (http, telnet, icmp, etc.) In turning on the debug for the ethernet driver, a bunch of:

DMAETH100: sendpacket()
DMAETH100: sendpacket: queue full
DMAETH100: sendpacket()
DMAETH100: sendpacket: queue full
DMAETH100: sendpacket()
DMAETH100: sendpacket: queue full
DMAETH100: sendpacket()
DMAETH100: sendpacket: queue full
DMAETH100: sendpacket()
DMAETH100: sendpacket: queue full
DMAETH100: sendpacket()

pops out.

And, displaying the registers shows TX collisions.

Comparing the dmaeth100.lib to the dmaeth.lib file, I notice some differences in functionality:

  • code to handle the netport interrupt (this is where a tx collision would be handled)
  • netport interrupt has no isr installed
  • netport interrupt not even enabled

The dmaeth.lib file has some code in there to reset the dma when collisions occur. I don’t see this code anywhere in the dmaeth100 library. Shouldn’t this be in there?

2

Dave,

Thanks for reporting this issue, and providing further details in email. I’ll be investigating it soon, and let you know what I’m able to find.