[PATCH net-next v4 0/3] net: stmmac: Introduce hw queue priority offload

Implement the offload of the tc mqprio hw queue priority in the stmmac
driver. This feature requires the mqprio to be configured in channel
mode.
Do not overwrite real_num_tx_queues configured by the qdisc in
stmmac_hw_setup().

The misbehaviour has been reported by Shashank and the patch has been
tested on a Qualcomm RB3-Gen2 board.

---
Changes in v4:
- Move real_num_tx_queues fix before mqprio offload patch in order to
  allow easy backporting.
- Add patch 'net: stmmac: set real_num_tx_queues from max(offset +
  count)' to fix the real_num_tx_queues configuration.
- Link to v3: https://lore.kernel.org/r/20260928-stmmac-mqprio-prio-offload-v3-0-abbe181f5024@oss.qualcomm.com (local)

Changes in v3:
- Fix cbs overwriting removing mqprio qdisc configured in dcb mode.
- Return an error in stmmac_reinit_queues() if configured number of tx
  queues is lower than xmit_qdisc.num_tx_queues and mqprio offloading is
  enabled.
- Link to v2: https://lore.kernel.org/r/20260924-stmmac-mqprio-prio-offload-v2-0-fdd8b69efccf@oss.qualcomm.com (local)

Changes in v2:
- Forbid cbs queue offload if mqprio is already enabled.
- SP requires 1:1 TC to TXQ map.
- Fix the real_num_tx_queue overwrite during device open.
- Require the qdisc to be configured in channel mode to enable hw queue
  priority offload in order to not introduce any regression in the
  previous driver behaviour.
- Link to v1: https://lore.kernel.org/r/20260918-stmmac-mqprio-prio-offload-v1-1-5328157fcb58@oss.qualcomm.com (local)

---
Lorenzo Bianconi (3):
      net: stmmac: set real_num_tx_queues to max(offset + count)
      net: stmmac: align real_num_tx_queues to mqprio configuration
      net: stmmac: add tc mqprio hw queue priority offload

 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |   9 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c  |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  37 ++++--
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c   | 147 ++++++++++++++++++++--
 4 files changed, 172 insertions(+), 23 deletions(-)
---
base-commit: eb0c18404c8943356f4aa164e5db9067b79ea93c
change-id: 20260918-stmmac-mqprio-prio-offload-3d82d87f7bc8

Best regards,
-- 
Lorenzo Bianconi [off-list ref]