netdev - [PATCH net-next 0/3] add DMA sync capability to page

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Date:   Sun, 10 Nov 2019 14:09:07 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     netdev@...r.kernel.org
Cc:     lorenzo.bianconi@...hat.com, davem@...emloft.net,
        thomas.petazzoni@...tlin.com, brouer@...hat.com,
        ilias.apalodimas@...aro.org, matteo.croce@...hat.com
Subject: [PATCH net-next 0/3] add DMA sync capability to page_pool API

Introduce the possibility to sync DMA memory in the page_pool API for
non-coherent devices. This feature allows to sync proper DMA size and
not always full buffer (dma_sync_single_for_device can be very costly).
Relying on page_pool DMA sync mvneta driver improves XDP_DROP pps of
about 180Kpps:

- XDP_DROP DMA sync managed by mvneta driver:	~420Kpps
- XDP_DROP DMA sync managed by page_pool API:	~595Kpps

Lorenzo Bianconi (3):
  net: mvneta: rely on page_pool_recycle_direct in mvneta_run_xdp
  net: page_pool: add the possibility sync dma memory for non-coherent
    devices
  net: mvneta: get rid of huge dma sync in mvneta_rx_refill

 drivers/net/ethernet/marvell/mvneta.c | 23 ++++++++++------
 include/net/page_pool.h               | 11 +++++---
 net/core/page_pool.c                  | 39 ++++++++++++++++++++++-----
 3 files changed, 55 insertions(+), 18 deletions(-)

-- 
2.21.0