netdev - Add AF_XDP zero-copy support for NFP

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Date:   Fri,  4 Mar 2022 11:22:09 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Niklas Söderlund <niklas.soderlund@...igine.com>
Cc:     netdev@...r.kernel.org, oss-drivers@...igine.com
Subject: Add AF_XDP zero-copy support for NFP

Niklas Söderlund says:

This series adds AF_XDP zero-copy support for the NFP driver. The series
is based on previous work done by Jakub Kicinski.

Patch 1/5 and 2/5 prepares the driver for AF_XDP support by refactoring
functions that will act differently once AF_XDP is active or not making
the driver easier to read and by preparing some functions to be reused
outside the local file scope. Patch 3/5 and 4/5 prepares the driver for
dealing the UMEM while finally patch 5/5 adds AF_XDP support.

Based on work by Jakub Kicinski.

Jakub Kicinski (1):
  nfp: wrap napi add/del logic

Niklas Söderlund (4):
  nfp: expose common functions to be used for AF_XDP
  nfp: xsk: add an array of xsk buffer pools to each data path
  nfp: xsk: add configuration check for XSK socket chunk size
  nfp: xsk: add AF_XDP zero-copy Rx and Tx support

 drivers/net/ethernet/netronome/nfp/Makefile   |   1 +
 drivers/net/ethernet/netronome/nfp/nfp_net.h  |  47 +-
 .../ethernet/netronome/nfp/nfp_net_common.c   | 207 ++++--
 .../ethernet/netronome/nfp/nfp_net_debugfs.c  |  33 +-
 .../net/ethernet/netronome/nfp/nfp_net_xsk.c  | 592 ++++++++++++++++++
 .../net/ethernet/netronome/nfp/nfp_net_xsk.h  |  29 +
 6 files changed, 855 insertions(+), 54 deletions(-)
 create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_xsk.c
 create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_xsk.h

-- 
2.20.1