Support for Killer E2400 Ethernet

[YongHyeon PYUN]

On Fri, Feb 19, 2016 at 08:23:28PM +0100, Tino Engel wrote:
> Thanks very much for the quick reply.
> 
> So let me shed some words on your input:
> 
> First: Limiting the memory size did not help at all, nothing changed.
> Unfortunetly I cannot post the whole results of the sysctl, since I cannot get this box into the net, and it is quite too much to type it by hand.
> Is there any special value you are interested in?
> 

I'm not sure, just wanted to know these counters to guess what
would be causing the issue.  Probably error related counters would
be helpful(sysctl -d dev.alc.0.stats will show description for each
counters).

> Then I applied your patch.
> The requested output is:
> alc0: DMA CFG : 0x0c347c54
> 

Could you verbose boot your kernel and show me the output of
alc(4) related ones?  It will show you read request/TLP payload
size as well as PCI/Chip revision information.

> The bad thing: The error still persists. :(
> It always writes "DMA write error" now followed by "DMA CFG : ..."
> 
> One more thing:
> The ping -s command results in the same error as trying to fetch something from the internet.
> 

'ping -s 1472' was one of known way that reliably trigger the issue
on E2200(and now E2400).

> Do you have any further ideas?
> 

Not yet.

Thanks.