From: David S. Miller Date: Tue, 2 Jul 2019 02:27:08 +0000 (-0700) Subject: Merge branch 'net-netsec-Add-XDP-Support' X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fec3b9ec47bdf1383806c947353ba8d1ddc137cf;p=linux.git Merge branch 'net-netsec-Add-XDP-Support' Ilias Apalodimas says: ==================== net: netsec: Add XDP Support This is a respin of https://www.spinics.net/lists/netdev/msg526066.html Since page_pool API fixes are merged into net-next we can now safely use it's DMA mapping capabilities. First patch changes the buffer allocation from napi/netdev_alloc_frag() to page_pool API. Although this will lead to slightly reduced performance (on raw packet drops only) we can use the API for XDP buffer recycling. Another side effect is a slight increase in memory usage, due to using a single page per packet. The second patch adds XDP support on the driver. There's a bunch of interesting options that come up due to the single Tx queue. Locking is needed(to avoid messing up the Tx queues since ndo_xdp_xmit and the normal stack can co-exist). We also need to track down the 'buffer type' for TX and properly free or recycle the packet depending on it's nature. Changes since RFC: - Bug fixes from Jesper and Maciej - Added page pool API to retrieve the DMA direction Changes since v1: - Use page_pool_free correctly if xdp_rxq_info_reg() failed ==================== Signed-off-by: David S. Miller --- fec3b9ec47bdf1383806c947353ba8d1ddc137cf