net/mlx5e: IPSec, Add support for ESP trailer removal by hardware
authorYossi Kuperman <yossiku@mellanox.com>
Sun, 22 Oct 2017 16:45:45 +0000 (19:45 +0300)
committerSaeed Mahameed <saeedm@mellanox.com>
Wed, 7 Mar 2018 23:53:18 +0000 (15:53 -0800)
commit788a8210764ce2977095010931959c87b60c2f51
tree96d961776baccf9e6d88f6b6283e4fa1d7b307af
parent581fdddee420cebe2cb781cb3c84c82676a86949
net/mlx5e: IPSec, Add support for ESP trailer removal by hardware

Current hardware decrypts and authenticates incoming ESP packets.
Subsequently, the software extracts the nexthdr field, truncates the
trailer and adjusts csum accordingly.

With this patch and a capable device, the trailer is being removed
by the hardware and the nexthdr field is conveyed via PET. This way
we avoid both the need to access the trailer (cache miss) and to
compute its relative checksum, which significantly improve
the performance.

Experiment shows that trailer removal improves the performance by
2Gbps, (netperf). Both forwarding and host-to-host configurations.

Signed-off-by: Yossi Kuperman <yossiku@mellanox.com>
Signed-off-by: Aviad Yehezkel <aviadye@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
drivers/net/ethernet/mellanox/mlx5/core/accel/ipsec.h
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c
drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
include/linux/mlx5/mlx5_ifc_fpga.h