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| author |   Eli Britstein <elibr@mellanox.com> | 2019-01-14 10:07:44 +0200 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@mellanox.com> | 2019-02-22 13:38:23 -0800 |
| commit | 97417f6182f80a80c9b4443f282ef707be74dade (patch) | |
| tree | a354870a5a20fcb5acce14e8d3cca81d9348f133 /drivers/net/ethernet/mellanox/mlx5/core/en_rep.h | |
| parent | net/mlx5: Introduce tunnel entropy control in PCMR register (diff) | |
| download | linux-dev-97417f6182f80a80c9b4443f282ef707be74dade.tar.xz linux-dev-97417f6182f80a80c9b4443f282ef707be74dade.zip | |
net/mlx5e: Fix GRE key by controlling port tunnel entropy calculation
Flow entropy is calculated on the inner packet headers and used for
flow distribution in processing, routing etc. For GRE-type
encapsulations the entropy value is placed in the eight LSB of the key
field in the GRE header as defined in NVGRE RFC 7637. For UDP based
encapsulations the entropy value is placed in the source port of the
UDP header.
The hardware may support entropy calculation specifically for GRE and
for all tunneling protocols. With commit df2ef3bff193 ("net/mlx5e: Add
GRE protocol offloading") GRE is offloaded, but the hardware is
configured by default to calculate flow entropy so packets transmitted
on the wire have a wrong key. To support UDP based tunnels (i.e VXLAN),
GRE (i.e. no flow entropy) and NVGRE (i.e. with flow entropy) the
hardware behaviour must be controlled by the driver.
Ensure port entropy calculation is enabled for offloaded VXLAN tunnels
and disable port entropy calculation in the presence of offloaded GRE
tunnels by monitoring the presence of entropy enabling tunnels (i.e
VXLAN) and entropy disabing tunnels (i.e GRE).
Fixes: df2ef3bff193 ("net/mlx5e: Add GRE protocol offloading")
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_rep.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rep.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h index 36eafc877e6b..1aa3e110bb97 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h @@ -37,6 +37,7 @@ #include <linux/rhashtable.h> #include "eswitch.h" #include "en.h" +#include "lib/port_tun.h" #ifdef CONFIG_MLX5_ESWITCH struct mlx5e_neigh_update_table { @@ -71,6 +72,8 @@ struct mlx5_rep_uplink_priv { */ struct list_head tc_indr_block_priv_list; struct notifier_block netdevice_nb; + + struct mlx5_tun_entropy tun_entropy; }; struct mlx5e_rep_priv { |