[fsdpwg] RoCEv2 QoS configs

[Erik Burrows]

All,
The Broadcom NICs are capable of using DSCP or VLAN tags to mark IP, RoCE
and CNP traffic with priorities for PFC and ECN handling.

The default is:
IP: untagged
No VLAN
PFC and ECN enabled on priority 3
RoCE: DSCP 26, priority 3
CNP: DSCP 47, priority 5

I don't believe I sent a driver/firmware/docs package with the hardware, so
I will put that together. The included tools can be used to reconfigure our
NIC to any QoS config.

Thanks,
  -Erik

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