linux-kernel - [PATCH net-next v5 0/3] Add minimal XDP support to TI AM65 CPSW Ethernet driver

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Message-Id: <20240223-am65-cpsw-xdp-basic-v5-0-bc1739170bc6@baylibre.com>
Date: Thu, 28 Mar 2024 10:26:39 +0100
From: Julien Panis <jpanis@...libre.com>
To: "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Russell King <linux@...linux.org.uk>, 
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>, 
 Sumit Semwal <sumit.semwal@...aro.org>, 
 Christian König <christian.koenig@....com>, 
 Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>, 
 Ratheesh Kannoth <rkannoth@...vell.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 bpf@...r.kernel.org, linux-media@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, 
 Julien Panis <jpanis@...libre.com>
Subject: [PATCH net-next v5 0/3] Add minimal XDP support to TI AM65 CPSW
 Ethernet driver

This patch adds XDP support to TI AM65 CPSW Ethernet driver.

The following features are implemented: NETDEV_XDP_ACT_BASIC,
NETDEV_XDP_ACT_REDIRECT, and NETDEV_XDP_ACT_NDO_XMIT.

Zero-copy and non-linear XDP buffer supports are NOT implemented.

Besides, the page pool memory model is used to get better performance.

Signed-off-by: Julien Panis <jpanis@...libre.com>
---
Changes in v5:
- In k3_cppi_desc_pool_destroy(), free memory allocated for desc_infos.
- Link to v4: https://lore.kernel.org/r/20240223-am65-cpsw-xdp-basic-v4-0-2e45e5dec048@baylibre.com

Changes in v4:
- Add skb_mark_for_recycle() in am65_cpsw_nuss_rx_packets() function.
- Specify napi page pool parameter in am65_cpsw_create_xdp_rxqs() function.
- Add benchmark numbers (with VS without page pool) in the commit description.
- Add xdp_do_flush() in am65_cpsw_run_xdp() function for XDP_REDIRECT case.
- Link to v3: https://lore.kernel.org/r/20240223-am65-cpsw-xdp-basic-v3-0-5d944a9d84a0@baylibre.com

Changes in v3:
- Fix a potential issue with TX buffer type, which is now set for each buffer.
- Link to v2: https://lore.kernel.org/r/20240223-am65-cpsw-xdp-basic-v2-0-01c6caacabb6@baylibre.com

Changes in v2:
- Use page pool memory model instead of MEM_TYPE_PAGE_ORDER0.
- In am65_cpsw_alloc_skb(), release reference on the page pool page
in case of error returned by build_skb().
- [nit] Cleanup am65_cpsw_nuss_common_open/stop() functions.
- [nit] Arrange local variables in reverse xmas tree order.
- Link to v1: https://lore.kernel.org/r/20240223-am65-cpsw-xdp-basic-v1-1-9f0b6cbda310@baylibre.com

---
Julien Panis (3):
      net: ethernet: ti: Add accessors for struct k3_cppi_desc_pool members
      net: ethernet: ti: Add desc_infos member to struct k3_cppi_desc_pool
      net: ethernet: ti: am65-cpsw: Add minimal XDP support

 drivers/net/ethernet/ti/am65-cpsw-nuss.c    | 536 +++++++++++++++++++++++++---
 drivers/net/ethernet/ti/am65-cpsw-nuss.h    |  13 +
 drivers/net/ethernet/ti/k3-cppi-desc-pool.c |  37 ++
 drivers/net/ethernet/ti/k3-cppi-desc-pool.h |   4 +
 4 files changed, 540 insertions(+), 50 deletions(-)
---
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
change-id: 20240223-am65-cpsw-xdp-basic-4db828508b48

Best regards,
-- 
Julien Panis <jpanis@...libre.com>