From: Saeed Mahameed <saeedm@xxxxxxxxxx> Mark Bloch Says: ================ Expose steering anchor Expose a steering anchor per priority to allow users to re-inject packets back into default NIC pipeline for additional processing. MLX5_IB_METHOD_STEERING_ANCHOR_CREATE returns a flow table ID which a user can use to re-inject packets at a specific priority. A FTE (flow table entry) can be created and the flow table ID used as a destination. When a packet is taken into a RDMA-controlled steering domain (like software steering) there may be a need to insert the packet back into the default NIC pipeline. This exposes a flow table ID to the user that can be used as a destination in a flow table entry. With this new method priorities that are exposed to users via MLX5_IB_METHOD_FLOW_MATCHER_CREATE can be reached from a non-zero UID. As user-created flow tables (via RDMA DEVX) are created with a non-zero UID thus it's impossible to point to a NIC core flow table (core driver flow tables are created with UID value of zero) from userspace. Create flow tables that are exposed to users with the shared UID, this allows users to point to default NIC flow tables. Steering loops are prevented at FW level as FW enforces that no flow table at level X can point to a table at level lower than X. =============== Mark Bloch (5): net/mlx5: Expose the ability to point to any UID from shared UID net/mlx5: fs, expose flow table ID to users net/mlx5: fs, allow flow table creation with a UID RDMA/mlx5: Refactor get flow table function RDMA/mlx5: Expose steering anchor to userspace drivers/infiniband/hw/mlx5/fs.c | 159 ++++++++++++++++-- drivers/infiniband/hw/mlx5/mlx5_ib.h | 6 + .../net/ethernet/mellanox/mlx5/core/fs_cmd.c | 16 +- .../net/ethernet/mellanox/mlx5/core/fs_cmd.h | 2 +- .../net/ethernet/mellanox/mlx5/core/fs_core.c | 8 +- .../mellanox/mlx5/core/steering/dr_cmd.c | 1 + .../mellanox/mlx5/core/steering/dr_table.c | 8 +- .../mellanox/mlx5/core/steering/dr_types.h | 1 + .../mellanox/mlx5/core/steering/fs_dr.c | 7 +- .../mellanox/mlx5/core/steering/mlx5dr.h | 3 +- include/linux/mlx5/fs.h | 2 + include/linux/mlx5/mlx5_ifc.h | 6 +- include/uapi/rdma/mlx5_user_ioctl_cmds.h | 17 ++ 13 files changed, 204 insertions(+), 32 deletions(-) -- 2.36.1
