OS ‘in-tree’ sfc Driver

Many Linux distributions include an in-tree version of the sfc driver:

• From sfptpd 3.5.0 onwards, the in-tree driver is supported. The out-of-tree driver from the NIC Software and Drivers downloads page on the Xilinx website is recommended for best performance.
• Earlier versions of sfptpd cannot use an in-tree driver.

To identify if the adapter is using an in-tree driver run the following ethtool command:

# ethtool -i <interface>
version: 4.0
firmware-version: 3.3.0.6298

If the reported version is 4.0 or 4.1, it is an in-tree driver.