kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

net/mlx5e: Match recirculated packet miss in slow table using reg_c1

Browse source 
Previous patch in series that implements stack devices RX path implements
indirect table rules that match on tunnel VNI. After such rule is created
all tunnel traffic is recirculated to root table. However, recirculated
packet might not match on any rules installed in the table (for example,
when IP traffic follows ARP traffic). In that case packets appear on
representor of tunnel endpoint VF instead being redirected to the VF
itself.

Extend slow table with additional flow group that matches on reg_c0 (source
port value set by indirect tables implemented by previous patch in series)
and reg_c1 (special 0xFFF mark). When creating offloads fdb tables, install
one rule per VF vport to match on recirculated miss packets and redirect
them to appropriate VF vport. Modify indirect tables code to also rewrite
reg_c1 with special 0xFFF mark.

Implementation reuses reg_c1 tunnel id bits. This is safe to do because
recirculated packets are always matched before decapsulation.

Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Vlad Buslov 2020-08-31 16:18:57 +03:00 • committed by Saeed Mahameed
parent 48d216e559
commit 8e404fefa5
5 changed files with 143 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

10
include/linux/mlx5/eswitch.h
View file

@ -114,8 +114,16 @@ u32 mlx5_eswitch_get_vport_metadata_for_set(struct mlx5_eswitch *esw,
#define ESW_ZONE_ID_BITS 8
#define ESW_TUN_OPTS_BITS 12
#define ESW_TUN_ID_BITS 12
#define ESW_TUN_OFFSET ESW_ZONE_ID_BITS
#define ESW_TUN_OPTS_OFFSET ESW_ZONE_ID_BITS
#define ESW_TUN_OFFSET ESW_TUN_OPTS_OFFSET
#define ESW_ZONE_ID_MASK GENMASK(ESW_ZONE_ID_BITS - 1, 0)
#define ESW_TUN_OPTS_MASK GENMASK(32 - ESW_TUN_ID_BITS - 1, ESW_TUN_OPTS_OFFSET)
#define ESW_TUN_MASK GENMASK(31, ESW_TUN_OFFSET)
#define ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT 0 /* 0 is not a valid tunnel id */
#define ESW_TUN_OPTS_SLOW_TABLE_GOTO_VPORT 0xFFF /* 0xFFF is a reserved mapping */
#define ESW_TUN_SLOW_TABLE_GOTO_VPORT ((ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT << ESW_TUN_OPTS_BITS) | \
ESW_TUN_OPTS_SLOW_TABLE_GOTO_VPORT)
#define ESW_TUN_SLOW_TABLE_GOTO_VPORT_MARK ESW_TUN_OPTS_MASK
u8 mlx5_eswitch_mode(struct mlx5_core_dev *dev);
#else /* CONFIG_MLX5_ESWITCH */