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[net-next,0/4] dpaa2-eth: add support for xdp bulk enqueue

Message ID 20200421152154.10965-1-ioana.ciornei@nxp.com
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Series dpaa2-eth: add support for xdp bulk enqueue | expand

Message

Ioana Ciornei April 21, 2020, 3:21 p.m. UTC 
The first 3 patches are there to setup the scene for using the bulk
enqueue feature.  First of all, the prototype of the enqueue function is
changed so that it returns the number of enqueued frames. Second, the
bulk enqueue interface is used but without any functional changes, still
one frame at a time is enqueued.  Third, the .ndo_xdp_xmit callback is
split into two stages, create all FDs for the xdp_frames received and
then enqueue them.

The last patch of the series builds on top of the others and instead of
issuing an enqueue operation for each FD it issues a bulk enqueue call
for as many frames as possible. This is repeated until all frames are
enqueued or the maximum number of retries is hit. We do not use the
XDP_XMIT_FLUSH flag since the architecture is not capable to store all
frames dequeued in a NAPI cycle, instead we send out right away all
frames received in a .ndo_xdp_xmit call.

Ioana Ciornei (4):
  dpaa2-eth: return num_enqueued frames from enqueue callback
  dpaa2-eth: use the bulk ring mode enqueue interface
  dpaa2-eth: split the .ndo_xdp_xmit callback into two stages
  dpaa2-eth: use bulk enqueue in .ndo_xdp_xmit

 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 141 +++++++++++-------
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.h  |   6 +-
 2 files changed, 88 insertions(+), 59 deletions(-)