[net-next,00/16] idpf: add XDP support

Message

Alexander Lobakin March 5, 2025, 4:21 p.m. UTC

Add XDP support (w/o XSk yet) to the idpf driver using the libeth_xdp
sublib, which will be then reused in at least iavf and ice.

In general, nothing outstanding comparing to ice, except performance --
let's say, up to 2x for .ndo_xdp_xmit() on certain platforms and
scenarios. libeth_xdp doesn't reinvent the wheel, mostly just
accumulates and optimizes what was already done before to stop copying
that wheel and the bugs over and over again.
idpf doesn't support VLAN Rx offload, so only the hash hint is present
for now.

Alexander Lobakin (12):
  libeth: convert to netmem
  libeth: support native XDP and register memory model
  libeth: add a couple of XDP helpers (libeth_xdp)
  libeth: add XSk helpers
  idpf: fix Rx descriptor ready check barrier in splitq
  idpf: a use saner limit for default number of queues to allocate
  idpf: link NAPIs to queues
  idpf: add support for nointerrupt queues
  idpf: use generic functions to build xdp_buff and skb
  idpf: add support for XDP on Rx
  idpf: add support for .ndo_xdp_xmit()
  idpf: add XDP RSS hash hint

Michal Kubiak (4):
  idpf: make complq cleaning dependent on scheduling mode
  idpf: remove SW marker handling from NAPI
  idpf: prepare structures to support XDP
  idpf: implement XDP_SETUP_PROG in ndo_bpf for splitq

 drivers/net/ethernet/intel/idpf/Kconfig       |    2 +-
 drivers/net/ethernet/intel/libeth/Kconfig     |   10 +-
 drivers/net/ethernet/intel/idpf/Makefile      |    2 +
 drivers/net/ethernet/intel/libeth/Makefile    |    8 +-
 include/net/libeth/types.h                    |  106 +-
 drivers/net/ethernet/intel/idpf/idpf.h        |   35 +-
 .../net/ethernet/intel/idpf/idpf_lan_txrx.h   |    6 +-
 drivers/net/ethernet/intel/idpf/idpf_txrx.h   |  126 +-
 drivers/net/ethernet/intel/idpf/xdp.h         |  180 ++
 drivers/net/ethernet/intel/libeth/priv.h      |   37 +
 include/net/libeth/rx.h                       |   28 +-
 include/net/libeth/tx.h                       |   36 +-
 include/net/libeth/xdp.h                      | 1869 +++++++++++++++++
 include/net/libeth/xsk.h                      |  685 ++++++
 drivers/net/ethernet/intel/iavf/iavf_txrx.c   |   14 +-
 drivers/net/ethernet/intel/idpf/idpf_dev.c    |   11 +-
 .../net/ethernet/intel/idpf/idpf_ethtool.c    |    6 +-
 drivers/net/ethernet/intel/idpf/idpf_lib.c    |   29 +-
 drivers/net/ethernet/intel/idpf/idpf_main.c   |    1 +
 .../ethernet/intel/idpf/idpf_singleq_txrx.c   |  111 +-
 drivers/net/ethernet/intel/idpf/idpf_txrx.c   |  678 +++---
 drivers/net/ethernet/intel/idpf/idpf_vf_dev.c |   11 +-
 .../net/ethernet/intel/idpf/idpf_virtchnl.c   |  113 +-
 drivers/net/ethernet/intel/idpf/xdp.c         |  509 +++++
 drivers/net/ethernet/intel/libeth/rx.c        |   40 +-
 drivers/net/ethernet/intel/libeth/tx.c        |   41 +
 drivers/net/ethernet/intel/libeth/xdp.c       |  449 ++++
 drivers/net/ethernet/intel/libeth/xsk.c       |  269 +++
 28 files changed, 4925 insertions(+), 487 deletions(-)
 create mode 100644 drivers/net/ethernet/intel/idpf/xdp.h
 create mode 100644 drivers/net/ethernet/intel/libeth/priv.h
 create mode 100644 include/net/libeth/xdp.h
 create mode 100644 include/net/libeth/xsk.h
 create mode 100644 drivers/net/ethernet/intel/idpf/xdp.c
 create mode 100644 drivers/net/ethernet/intel/libeth/tx.c
 create mode 100644 drivers/net/ethernet/intel/libeth/xdp.c
 create mode 100644 drivers/net/ethernet/intel/libeth/xsk.c

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Sending in one batch to introduce/show both the lib and the user.
Let me know if I'd better split.