netdev - [PATCH bpf-next 00/15] new kfunc XDP hints and ice implementation

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Date: Fri, 12 May 2023 17:16:24 +0200
From: Larysa Zaremba <larysa.zaremba@...el.com>
To: bpf@...r.kernel.org
Cc: Larysa Zaremba <larysa.zaremba@...el.com>,
	Stanislav Fomichev <sdf@...gle.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Jakub Kicinski <kuba@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yhs@...com>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	Anatoly Burakov <anatoly.burakov@...el.com>,
	Jesper Dangaard Brouer <brouer@...hat.com>,
	Alexander Lobakin <alexandr.lobakin@...el.com>,
	Magnus Karlsson <magnus.karlsson@...il.com>,
	Maryam Tahhan <mtahhan@...hat.com>,
	xdp-hints@...-project.net,
	netdev@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next 00/15] new kfunc XDP hints and ice implementation

This series introduces XDP hints support into ice driver and adds new kfunc
hints that utilize hardware capabilities.

- patches 01-04 refactors driver descriptor to skb fields processing code,
  making it more reusable without changing any behavior.

- patches 05-08 add support add support for existing hints (timestamp and 
  hash) in ice driver.

- patches 09-12 introduce new kfunc hints, namely 2 VLAN tag hints 
  (ctag & stag separately) and "checksum level", which is basically
  a CHECKSUM_UNNECESSARY indicator. Then those hints are implemented in
  ice driver.

- patches 13-15 adjust xdp_hw_metadata to account for new hints.

- in particular, patch 14 lifts the limitation on data_meta size to be
  32 or lower, because all the information that needs to be passed into
  AF_XDP from XDP in xdp_hw_metadata no longer fits into 32 bytes.

Aleksander Lobakin (1):
  net, xdp: allow metadata > 32

Larysa Zaremba (14):
  ice: make RX hash reading code more reusable
  ice: make RX HW timestamp reading code more reusable
  ice: make RX checksum checking code more reusable
  ice: Make ptype internal to descriptor info processing
  ice: Introduce ice_xdp_buff
  ice: Support HW timestamp hint
  ice: Support RX hash XDP hint
  ice: Support XDP hints in AF_XDP ZC mode
  xdp: Add VLAN tag hint
  ice: Implement VLAN tag hint
  xdp: Add checksum level hint
  ice: Implement checksum level hint
  selftests/bpf: Allow VLAN packets in xdp_hw_metadata
  selftests/bpf: Add flags and new hints to xdp_hw_metadata

 Documentation/networking/xdp-rx-metadata.rst  |  14 +-
 drivers/net/ethernet/intel/ice/ice.h          |   2 +
 .../net/ethernet/intel/ice/ice_lan_tx_rx.h    | 412 +++++++++---------
 drivers/net/ethernet/intel/ice/ice_main.c     |   1 +
 drivers/net/ethernet/intel/ice/ice_ptp.c      |  23 +-
 drivers/net/ethernet/intel/ice/ice_ptp.h      |  18 +-
 drivers/net/ethernet/intel/ice/ice_txrx.c     |  13 +-
 drivers/net/ethernet/intel/ice/ice_txrx.h     |  23 +-
 drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 311 +++++++++++--
 drivers/net/ethernet/intel/ice/ice_txrx_lib.h |  13 +-
 drivers/net/ethernet/intel/ice/ice_xsk.c      |  16 +-
 include/linux/netdevice.h                     |   3 +
 include/linux/skbuff.h                        |  13 +-
 include/net/xdp.h                             |  16 +-
 kernel/bpf/offload.c                          |   6 +
 net/core/xdp.c                                |  36 ++
 .../selftests/bpf/progs/xdp_hw_metadata.c     |  49 ++-
 tools/testing/selftests/bpf/xdp_hw_metadata.c |  29 +-
 tools/testing/selftests/bpf/xdp_metadata.h    |  36 +-
 19 files changed, 738 insertions(+), 296 deletions(-)

-- 
2.35.3