On Thu, Sep 02, 2021 at 03:29:43PM +0000, Nikolova, Tatyana E wrote:
> > Given that ice is both iwarp and roce, is there some better way to detect
> > this? Doesn't the aux device encode it?
>
> Hi Jason,
>
> We tried a few experiments without success. The auxiliary devices
> alias with our driver and not ice, so maybe this is the reason?
>
> Here is an example of what we tried.
>
> udevadm info /sys/devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0
> P: /devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0
> E: DEVPATH=/devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0
> E: DRIVER=irdma
> E: MODALIAS=auxiliary:ice.roce
> E: SUBSYSTEM=auxiliary
>
> udevadm info /sys/bus/auxiliary/devices/ice.roce.0
> P: /devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0
> E: DEVPATH=/devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0
> E: DRIVER=irdma
> E: MODALIAS=auxiliary:ice.roce
> E: SUBSYSTEM=auxiliary
>
> Given the udevadm output, we put the following line in the udev rdma-description.rules:
>
> SUBSYSTEMS=="auxiliary", DEVPATH=="*/devices/pci0000:2e/0000:2e:00.0/0000:2f:00.0/ice.roce.0/*", ENV{ID_RDMA_ROCE}="1"
What is the SUBSYSTEM=="infiniband" device like?
This seems like the right direction, you need to wrangle udev though..
Jason
