netdev - [PATCH net-next V2 0/8] mlx5e XDP support

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Date:   Wed, 21 Sep 2016 12:19:41 +0300
From:   Tariq Toukan <tariqt@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eran Ben Elisha <eranbe@...lanox.com>,
        Rana Shahout <ranas@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Tariq Toukan <tariqt@...lanox.com>
Subject: [PATCH net-next V2 0/8] mlx5e XDP support

This series adds XDP support in mlx5e driver.
This includes the use cases: XDP_DROP, XDP_PASS, and XDP_TX.

Single stream performance tests show 16.5 Mpps for XDP_DROP,
and 12.4 Mpps for XDP_TX, with nice scalability for multiple streams/rings.

This rate of XDP_DROP is lower than the 32 Mpps we got in previous
implementation, when Striding RQ was used.

We moved to non-Striding RQ, as some XDP_TX requirements (like headroom,
packet-per-page) cannot be satisfied with the current Striding RQ HW,
and we decided to fully support both DROP/TX.

Few directions are considered in order to enable the faster rate for XDP_DROP,
e.g a possibility for users to enable Striding RQ so they choose optimized
XDP_DROP on the price of partial XDP_TX functionality, or some HW changes.

Series generated against net-next commit:
cf714ac147e0 'ipvlan: Fix dependency issue'

Thanks,
Tariq

V2:
* patch 8:
 - when XDP_TX fails, call mlx5e_page_release and drop the packet.
 - update xdp_tx counter within mlx5e_xmit_xdp_frame.
   (mlx5e_xmit_xdp_frame return value becomes obsolete, change it to void)
 - drop the packet for unknown XDP return code.
* patch 9:
 - use a boolean for xdp_doorbell in SQ struct, instead of dragging it
   throughout the functions calls.
 - handle doorbell and counters within mlx5e_xmit_xdp_frame.

Rana Shahout (1):
  net/mlx5e: XDP fast RX drop bpf programs support

Saeed Mahameed (7):
  net/mlx5e: Build RX SKB on demand
  net/mlx5e: Union RQ RX info per RQ type
  net/mlx5e: Slightly reduce hardware LRO size
  net/mlx5e: Dynamic RQ type infrastructure
  net/mlx5e: Have a clear separation between different SQ types
  net/mlx5e: XDP TX forwarding support
  net/mlx5e: XDP TX xmit more

 drivers/net/ethernet/mellanox/mlx5/core/en.h       |  69 ++-
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c  | 462 ++++++++++++++++-----
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c    | 349 ++++++++++------
 drivers/net/ethernet/mellanox/mlx5/core/en_stats.h |  12 +
 drivers/net/ethernet/mellanox/mlx5/core/en_tx.c    |  63 ++-
 drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c  |  65 ++-
 6 files changed, 757 insertions(+), 263 deletions(-)

-- 
1.8.3.1