netdev - [net-next, PATCH 0/2, v3] net: socionext: XDP support

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Message-Id: <1538220482-16129-1-git-send-email-ilias.apalodimas@linaro.org>
Date:   Sat, 29 Sep 2018 14:28:00 +0300
From:   Ilias Apalodimas <ilias.apalodimas@...aro.org>
To:     netdev@...r.kernel.org, jaswinder.singh@...aro.org
Cc:     ard.biesheuvel@...aro.org, masami.hiramatsu@...aro.org,
        arnd@...db.de, bjorn.topel@...el.com, magnus.karlsson@...el.com,
        brouer@...hat.com, daniel@...earbox.net, ast@...nel.org,
        jesus.sanchez-palencia@...el.com, vinicius.gomes@...el.com,
        makita.toshiaki@....ntt.co.jp,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: [net-next, PATCH 0/2, v3] net: socionext: XDP support

This patch series adds AF_XDP support socionext netsec driver
In addition the new dma allocation scheme offers a 10% boost on Rx
pps rate using 64b packets

- patch [1/2]: Use a different allocation scheme for Rx DMA buffers to 
  prepare the driver for AF_XDP support
- patch [2/2]: Add XDP support without zero-copy

test and performance numbers (64b packets):
-------------------------------------------
- Normal SKBs on Rx: ~217kpps
test: pktgen -> intel i210 -> netsec -> XDP_TX/XDP_REDIRECT
- XDP_TX: 320kpps
- XDP_REDIRECT: 320kpps

qemu -> pktgen -> virtio -> ndo_xdp_xmit -> netsec
- ndo_xdp_xmit: Could not send more than 120kpps. Interface forwarded that 
                with success

Changes since v2:
 - Always allocate Rx buffers with XDP_PACKET_HEADROOM
 
 Björn Töpel:
 - Added locking in the Tx queue

 Jesper Dangaard Brouer:
 - Added support for .ndo_xdp_xmit
 - XDP_TX does not flush every packet

Changes since v1:
- patch [2/2]:
 Toshiaki Makita:
 - Added XDP_PACKET_HEADROOM
 - Fixed a bug on XDP_PASS case
 - Using extact for error messaging instead of netdev_warn, when
   trying to setup XDP

Ilias Apalodimas (2):
  net: socionext: different approach on DMA
  net: socionext: add XDP support

 drivers/net/ethernet/socionext/netsec.c | 541 +++++++++++++++++++++++++-------
 1 file changed, 426 insertions(+), 115 deletions(-)

-- 
2.7.4