From: Vladimir Oltean <olte...@gmail.com> Date: Thu, 28 May 2020 03:27:58 +0300
> From: Vladimir Oltean <vladimir.olt...@nxp.com> > > SJA1105, being AVB/TSN switches, provide hardware assist for the > Credit-Based Shaper as described in the IEEE 8021Q-2018 document. > > First generation has 10 shapers, freely assignable to any of the 4 > external ports and 8 traffic classes, and second generation has 16 > shapers. > > The Credit-Based Shaper tables are accessed through the dynamic > reconfiguration interface, so we have to restore them manually after a > switch reset. The tables are backed up by the static config only on > P/Q/R/S, and we don't want to add custom code only for that family, > since the procedure that is in place now works for both. > > Tested with the following commands: > > data_rate_kbps=67000 > port_transmit_rate_kbps=1000000 > idleslope=$data_rate_kbps > sendslope=$(($idleslope - $port_transmit_rate_kbps)) > locredit=$((-0x80000000)) > hicredit=$((0x7fffffff)) > tc qdisc add dev swp2 root handle 1: mqprio hw 0 num_tc 8 \ > map 0 1 2 3 4 5 6 7 \ > queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 > tc qdisc replace dev swp2 parent 1:1 cbs \ > idleslope $idleslope \ > sendslope $sendslope \ > hicredit $hicredit \ > locredit $locredit \ > offload 1 > > Signed-off-by: Vladimir Oltean <vladimir.olt...@nxp.com> Applied, thank you.
