netdev - [PATCH RFC bpf-next v2 0/5] Add the the capability to load HW RX checsum in eBPF programs

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Message-Id: <20250925-bpf-xdp-meta-rxcksum-v2-0-6b3fe987ce91@kernel.org>
Date: Thu, 25 Sep 2025 11:30:32 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Donald Hunter <donald.hunter@...il.com>, 
 Jakub Kicinski <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>, 
 Stanislav Fomichev <sdf@...ichev.me>, Andrew Lunn <andrew+netdev@...n.ch>, 
 Tony Nguyen <anthony.l.nguyen@...el.com>, 
 Przemek Kitszel <przemyslaw.kitszel@...el.com>, 
 Alexander Lobakin <aleksander.lobakin@...el.com>, 
 Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, 
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, 
 Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, 
 Shuah Khan <shuah@...nel.org>, 
 Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, 
 intel-wired-lan@...ts.osuosl.org, linux-kselftest@...r.kernel.org, 
 Lorenzo Bianconi <lorenzo@...nel.org>
Subject: [PATCH RFC bpf-next v2 0/5] Add the the capability to load HW RX
 checsum in eBPF programs

Introduce bpf_xdp_metadata_rx_checksum() kfunc in order to load the HW
RX cheksum results in the eBPF program binded to the NIC.
Implement xmo_rx_checksum callback for veth and ice drivers.

Please note ice support changes are just compile-tested at the moment.

---
Changes in RFC v2:
- Squash patch 1/6 and 2/6
- Introduce enum xdp_checksum definitions
- Rework ice support to reuse ice_rx_csum codebase

---
Lorenzo Bianconi (5):
      netlink: specs: Add XDP RX checksum capability to XDP metadata specs
      net: veth: Add xmo_rx_checksum callback to veth driver
      net: ice: Add xmo_rx_checksum callback
      selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum
      selftests/bpf: Add bpf_xdp_metadata_rx_checksum support to xdp_hw_metadat prog

 Documentation/netlink/specs/netdev.yaml            |   5 +
 drivers/net/ethernet/intel/ice/ice_base.c          |   1 +
 drivers/net/ethernet/intel/ice/ice_txrx.h          |   1 +
 drivers/net/ethernet/intel/ice/ice_txrx_lib.c      | 125 +++++++++++++--------
 drivers/net/veth.c                                 |  20 ++++
 include/net/xdp.h                                  |  14 +++
 net/core/xdp.c                                     |  29 +++++
 .../selftests/bpf/prog_tests/xdp_metadata.c        |   7 ++
 .../testing/selftests/bpf/progs/xdp_hw_metadata.c  |   7 ++
 tools/testing/selftests/bpf/progs/xdp_metadata.c   |   1 +
 tools/testing/selftests/bpf/xdp_hw_metadata.c      |  27 +++++
 tools/testing/selftests/bpf/xdp_metadata.h         |  13 +++
 12 files changed, 206 insertions(+), 44 deletions(-)
---
base-commit: 5e3fee34f626a8cb8715f5b5409416c481714ebf
change-id: 20250925-bpf-xdp-meta-rxcksum-900685e2909d

Best regards,
-- 
Lorenzo Bianconi <lorenzo@...nel.org>