Re: [RTnet-users] rt_e1000e carrier

[Elker C. <elk...@gm...>]

Hi all,
after looking at driver source, I've figured out that rt_e1000e driver 
do not support link detection.
I've added basic ethtool support for GLINK on e1000e, see attached patch.

Regards,
Elker



Il 25/06/2014 11.53, Elker Cavina ha scritto:
> Hi
> I'm using RTNet-0.9.13 with RTAI-3.9.2; my embedded pc has two e1000e 
> ethernet ports (so rt_e1000e is employed).
>
> The first port is configured as standard linux (eth1), second port 
> gets configured to rtnet (firstly unbinded by linux driver, then 
> configured as rteth0).  So far I'm working correctly in rtnet side; 
> I'm also using rtcap and configured rteth0 on linux side and tcpdump 
> works great to sniff realtime packets.
>
> Now I want to detect if carrier is lost on rtnet port; on linux 
> managed ethernet port looking at /sys/class/net/eth1/carrier I can 
> detect link loss, however in /sys/class/net/rteth0/carrier I always 
> get link active even on cable disconnected.
>
> Digging into code I can see carrier detected and managed in 
> rtdev->link_state, but I can't find the link to the sys filesystem or 
> an ioctl call to detect link status.
>
> Is possible to detect link status on rt_e1000e driver?
> If not, can someone point to some code to implement this?
>
> Thanks,
> Elker