Hello André

On 9/18/2016 10:42 PM, André Roth wrote:

Hello,

quoted

For example, you could try disabling the scatter-gather or tx-cum
via ethtool and seeing if there is some benefit; so we could image
some problem on your HW or SYNP MAC integration for checksumming
on tx side.

disabling the following:
  ethtool -K eth0 sg off
or:
  ethtool -K eth0 tx off
does not prevent the network communication going down..

quoted

Also you could check the AXI tuning and PBL value. To be honest
(thinking about your problem) I can actually suspect some related
problem on bus setup. So I suggest you to play with these value
(better if you ask for having values from HW validation on your side).
Otherwise the stmmac uses a default that cannot be good for your
platform. For example, sometime I have seen that PBL is better if
reduced to 8 instead of 32 and w/o 4xPBL...

how can I set those values ?

thanks for your time,

welcome

take a look at Documentation/devicetree/bindings/net/stmmac.txt

peppe

 andre