[bpf-next,V1,0/7] XDP-hints kfuncs for Intel driver igc

Message

Jesper Dangaard Brouer March 17, 2023, 2:33 p.m. UTC

Implemented XDP-hints metadata kfuncs for Intel driver igc.

Primarily used the tool in tools/testing/selftests/bpf/ xdp_hw_metadata,
when doing driver development of these features. Recommend other driver
developers to do the same. In the process xdp_hw_metadata was updated to
help assist development. I've documented my practical experience with igc
and tool here[1].

[1] https://github.com/xdp-project/xdp-project/blob/master/areas/hints/xdp_hints_kfuncs02_driver_igc.org

This patchset implement RX-hash as a simple u32 value (as this is the
current kfunc API), but my experience with RX-hash is that we will also
need to provide the Hash-type for this raw value to be useful to
BPF-developers. This will be addressed in followup work once this patchset
lands.

---

Jesper Dangaard Brouer (7):
      xdp: bpf_xdp_metadata use EOPNOTSUPP for no driver support
      igc: enable and fix RX hash usage by netstack
      selftests/bpf: xdp_hw_metadata track more timestamps
      selftests/bpf: xdp_hw_metadata RX hash return code info
      igc: add igc_xdp_buff wrapper for xdp_buff in driver
      igc: add XDP hints kfuncs for RX timestamp
      igc: add XDP hints kfuncs for RX hash


 Documentation/networking/xdp-rx-metadata.rst  |  7 +-
 drivers/net/ethernet/intel/igc/igc.h          | 35 +++++++
 drivers/net/ethernet/intel/igc/igc_main.c     | 94 ++++++++++++++++---
 drivers/net/ethernet/mellanox/mlx4/en_rx.c    |  4 +-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  |  4 +-
 drivers/net/veth.c                            |  4 +-
 net/core/xdp.c                                | 10 +-
 .../selftests/bpf/progs/xdp_hw_metadata.c     | 17 ++--
 tools/testing/selftests/bpf/xdp_hw_metadata.c | 51 ++++++++--
 tools/testing/selftests/bpf/xdp_metadata.h    |  1 +
 10 files changed, 194 insertions(+), 33 deletions(-)

--
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Sr. Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer