Re: [PATCH net-next 4/5] tsnep: Add TSN endpoint Ethernet MAC driver

This driver provides a driver specific interface in tsnep_stream.c for
direct access to all but the first TX/RX queue pair. There are two
reasons for this interface. First: It enables the reservation or direct use
of TX/RX queue pairs by real-time application on dedicated CPU cores or
in user space.

Hi Gerhard

I expect you will get a lot of push back with a character device in
the middle of an Ethernet driver. One that mmap the Tx/Rx queue is
going to need a lot of review to make sure it is secure. Maybe talk to
the XDP/AF_XDP people, there might be a way to do it through that?

So i strongly suggest your drop tsnep_stream.c for the moment. Get the
basic plain boring Ethernet driver merged. Then start a discussion
about a suitable API for exporting rings to user space.

      Andrew