Re: [PATCH v4 net-next] octeontx2-pf: add mqprio bandwidth offload for NIX TX schedulers

On 2026-08-03 at 09:57:24, Ratheesh Kannoth (rkannoth@marvell.com) wrote:

Add TC_SETUP_QDISC_MQPRIO handling to program per-queue MDQ CIR/PIR
shaping after mqprio channel mode setup, widen SMQ allocation when
per-queue rate limiting is enabled, and align MDQ parents under that
mode. Reuse otx2_convert_rate for bps-to-Mbps, fix sparse register
writes when only one of min/max is set, and improve AF txschq map
mismatch diagnostics.

Configuration examples:

1) Set up commands

a. ifconfig eth0 xx.xx.xx.xx up
b. tc qdisc add dev eth0 parent root handle 100 mqprio num_tc 4 \
   map 0 1 2 3  queues 1@0 1@1 1@2 1@3  hw 1 mode channel shaper \
   bw_rlimit \
   min_rate 100Mbit 200Mbit 300Mbit 400Mbit \
   max_rate 150Mbit 250Mbit 350Mbit 450Mbit

c. iptables -t mangle -A POSTROUTING -p udp -j CLASSIFY --set-class 0:1

This will guarantee max rate as 250Mbits for UDP traffic

2) Tear down mqprio

a. ifconfig eth0 up
b. tc qdisc del dev eth0 root

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>

Will address sashiko comments in v5

pw-bot: changes-requested