Re: Setting RoCE to v2 automatically

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

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On Wed, Mar 22, 2017 at 05:30:11PM -0600, Robert LeBlanc wrote:
> How are people setting their adapters to use RoCEv2 automatically?
> I've created a udev rule that creates the directory in configfs and
> echos into default_roce_mode and it works fine if I run it with
> 'udevadm test', but on boot or module load it is not working (I do
> have the udev rule in initrd and it is creating the VFs, and renaming
> the adapters from my other rules). I was trying to get it all done
> through udev so that it happens when the module is loaded or at boot.
> We are not using OFED and the 4.9.14 kernel on CentOS 7.2.
>
> My current rule is:
> ACTION=="add", SUBSYSTEM=="net", ATTR{type}=="1",
> ATTRS{subsystem_vendor}=="0x15b3", \
> ATTRS{device}=="0x101?", WAIT_FOR="/sys/kernel/config/rdma_cm", \
>    PROGRAM=="/bin/sh -ec 'D=$(ls /sys$DEVPATH/device/infiniband); \
>        C=/sys/kernel/config/rdma_cm; if [ ! -d $C/$D ]; \
>        then mkdir $C/$D; fi; \
>        echo RoCE v2 > $C/$D/ports/1/default_roce_mode'"
>
> I've tried a variation using the infiniband subsystem, but it had the
> same result.
>
> Any ideas?

Maybe, the best way for the ecosystem in 2017 will be to set
RoCE v2 as a default in future kernels.

>
> Thanks,
> ----------------
> Robert LeBlanc
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