On Wed, Jul 13, 2022 at 03:31:33PM -0700, Saeed Mahameed wrote: > On 03 Jul 13:54, Saeed Mahameed wrote: > > From: Mark Bloch <mbloch@xxxxxxxxxx> > > > > 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. > > > > Signed-off-by: Mark Bloch <mbloch@xxxxxxxxxx> > > Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxx> > > Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxx> > > --- > > drivers/infiniband/hw/mlx5/fs.c | 138 ++++++++++++++++++++++- > > drivers/infiniband/hw/mlx5/mlx5_ib.h | 6 + > > include/uapi/rdma/mlx5_user_ioctl_cmds.h | 17 +++ > > Jason, Can you ack/nack ? This has uapi.. I need to move forward with this > submission. Yes, it looks fine, can you update the shared branch? Jason
