netdev - [PATCH v3 net-next 0/7] net: ethernet: ti: cpsw: Add XDP support

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Date:   Wed,  5 Jun 2019 16:20:02 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     grygorii.strashko@...com, hawk@...nel.org, davem@...emloft.net
Cc:     ast@...nel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, xdp-newbies@...r.kernel.org,
        ilias.apalodimas@...aro.org, netdev@...r.kernel.org,
        daniel@...earbox.net, jakub.kicinski@...ronome.com,
        john.fastabend@...il.com,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [PATCH v3 net-next 0/7] net: ethernet: ti: cpsw: Add XDP support

This patchset adds XDP support for TI cpsw driver and base it on
page_pool allocator. It was verified on af_xdp socket drop,
af_xdp l2f, ebpf XDP_DROP, XDP_REDIRECT, XDP_PASS, XDP_TX.

It was verified with following configs enabled:
CONFIG_JIT=y
CONFIG_BPFILTER=y
CONFIG_BPF_SYSCALL=y
CONFIG_XDP_SOCKETS=y
CONFIG_BPF_EVENTS=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_BPF_JIT=y
CONFIG_CGROUP_BPF=y

Link on previous v2:
https://lkml.org/lkml/2019/5/30/1315

Also regular tests with iperf2 were done in order to verify impact on
regular netstack performance, compared with base commit:
https://pastebin.com/JSMT0iZ4

v2..v3:
- each rxq and ndev has its own page pool

v1..v2:
- combined xdp_xmit functions
- used page allocation w/o refcnt juggle
- unmapped page for skb netstack
- moved rxq/page pool allocation to open/close pair
- added several preliminary patches:
  net: page_pool: add helper function to retrieve dma addresses
  net: page_pool: add helper function to unmap dma addresses
  net: ethernet: ti: cpsw: use cpsw as drv data
  net: ethernet: ti: cpsw_ethtool: simplify slave loops


Based on net-next/master

Ilias Apalodimas (2):
  net: page_pool: add helper function to retrieve dma addresses
  net: page_pool: add helper function to unmap dma addresses

Ivan Khoronzhuk (5):
  net: ethernet: ti: cpsw: use cpsw as drv data
  net: ethernet: ti: cpsw_ethtool: simplify slave loops
  net: ethernet: ti: davinci_cpdma: add dma mapped submit
  net: ethernet: ti: davinci_cpdma: return handler status
  net: ethernet: ti: cpsw: add XDP support

 drivers/net/ethernet/ti/Kconfig         |   1 +
 drivers/net/ethernet/ti/cpsw.c          | 555 ++++++++++++++++++++----
 drivers/net/ethernet/ti/cpsw_ethtool.c  | 100 ++++-
 drivers/net/ethernet/ti/cpsw_priv.h     |   9 +-
 drivers/net/ethernet/ti/davinci_cpdma.c | 122 ++++--
 drivers/net/ethernet/ti/davinci_cpdma.h |   6 +-
 drivers/net/ethernet/ti/davinci_emac.c  |  18 +-
 include/net/page_pool.h                 |   6 +
 net/core/page_pool.c                    |   7 +
 9 files changed, 685 insertions(+), 139 deletions(-)

-- 
2.17.1