Re: [RFC net-next 0/3] net: marvell: prestera: Add Switchdev driver for Prestera family ASIC device 98DX326x (AC3x)

[Ido Schimmel]

On Tue, Feb 25, 2020 at 04:30:52PM +0000, Vadym Kochan wrote:
> Marvell Prestera 98DX326x integrates up to 24 ports of 1GbE with 8
> ports of 10GbE uplinks or 2 ports of 40Gbps stacking for a largely
> wireless SMB deployment.

It seems that this device has enough ports to loopback to each other in
order to create meaningful topologies. Therefore, I suggest running
relevant existing tests under tools/testing/selftests/net/forwarding/
and contributing new ones. See tools/testing/selftests/net/forwarding/README
for details.

One problem you will run into is that your netdev notifier only allows
bridge uppers and will therefore veto VRF uppers, which is a
prerequisite. However, since you don't support L3 offload, then all
routed traffic should reach the CPU anyway and therefore VRF uppers can
be allowed.