On Thu, Sep 02, 2021 at 03:29:43PM +0000, Nikolova, Tatyana E wrote:

quoted

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