linux-kernel - [PATCH net-next v4 0/6] net: ethernet: ti: am65-cpsw: Add multi queue RX support

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Message-Id: <20240910-am65-cpsw-multi-rx-v4-0-077fa6403043@kernel.org>
Date: Tue, 10 Sep 2024 12:23:57 +0300
From: Roger Quadros <rogerq@...nel.org>
To: "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Siddharth Vadapalli <s-vadapalli@...com>, 
 Julien Panis <jpanis@...libre.com>, Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>
Cc: Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>, 
 Joe Damato <jdamato@...tly.com>, srk@...com, vigneshr@...com, 
 danishanwar@...com, pekka Varis <p-varis@...com>, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org, 
 bpf@...r.kernel.org, Roger Quadros <rogerq@...nel.org>
Subject: [PATCH net-next v4 0/6] net: ethernet: ti: am65-cpsw: Add multi
 queue RX support

Hi,

am65-cpsw can support up to 8 queues at Rx. So far we have
been using only one queue (i.e. default flow) for all RX traffic.

This series adds multi-queue support. The driver starts with
1 RX queue by default. User can increase the RX queues via ethtool,
e.g. 'ethtool -L ethx rx <N>'

The series also adds regmap and regfield support to some of the
ALE registers. It adds Policer/Classifier registers and fields.

Converting the existing ALE control APIs to regfields can be a separate
exercise.

Some helper functions are added to read/write to the Policer/Classifier
registers and a default Classifier setup function is added that
routes packets based on their PCP/DSCP priority to different RX queues.

Signed-off-by: Roger Quadros <rogerq@...nel.org>
---
Changes in v4:
- Use single macro AM65_CPSW_MAX_QUEUES for both TX and RX queues
  to simplify code
- reuse am65_cpsw_get/set_per_queue_coalesce for am65_cpsw_get/set_coalesce.
- return -EINVAL if unsupported tx/rx_coalesce_usecs in
  am65_cpsw_set_coalesce.
- reverse Xmas tree declaration order fixes in cpsw_ale
- Link to v3: https://lore.kernel.org/r/20240703-am65-cpsw-multi-rx-v3-0-f11cd860fd72@kernel.org

Changes in v3:
- code style fixes
- squashed patches 5 and 6
- added comment about priority to thread mapping table.
- Added Reviewed-by Simon Horman.
- Link to v2: https://lore.kernel.org/r/20240628-am65-cpsw-multi-rx-v2-0-c399cb77db56@kernel.org

Changes in v2:
- rebase to net/next
- fixed RX stall issue during iperf
- Link to v1: https://lore.kernel.org/r/20240606-am65-cpsw-multi-rx-v1-0-0704b0cb6fdc@kernel.org

---
Roger Quadros (6):
      net: ethernet: ti: am65-cpsw: Introduce multi queue Rx
      net: ethernet: ti: cpsw_ale: use regfields for ALE registers
      net: ethernet: ti: cpsw_ale: use regfields for number of Entries and Policers
      net: ethernet: ti: cpsw_ale: add Policer and Thread control register fields
      net: ethernet: ti: cpsw_ale: add policer/classifier helpers and setup defaults
      net: ethernet: ti: am65-cpsw: setup priority to flow mapping

 drivers/net/ethernet/ti/am65-cpsw-ethtool.c |  75 +++---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c    | 388 ++++++++++++++++------------
 drivers/net/ethernet/ti/am65-cpsw-nuss.h    |  39 +--
 drivers/net/ethernet/ti/cpsw_ale.c          | 287 ++++++++++++++++++--
 drivers/net/ethernet/ti/cpsw_ale.h          |  62 ++++-
 5 files changed, 594 insertions(+), 257 deletions(-)
---
base-commit: bfba7bc8b7c2c100b76edb3a646fdce256392129
change-id: 20240606-am65-cpsw-multi-rx-fb6cf8dea5eb

Best regards,
-- 
Roger Quadros <rogerq@...nel.org>