net/mlx5: fs, Add support for RDMA RX steering over IB link layer

Relax the capability check for creating the RDMA RX steering domain
by considering only the capabilities reported by the firmware
as necessary for its creation, which in turn allows RDMA RX creation
over devices with IB link layer as well.

The table_miss_action_domain capability is required only for a specific
priority, which is handled in mlx5_rdma_enable_roce_steering().
The additional capability check for this case is already in place.

Signed-off-by: Patrisious Haddad <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Signed-off-by: Tariq Toukan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: PatrisiousHaddad

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

@@ -217,7 +217,8 @@ static int mlx5_cmd_update_root_ft(struct mlx5_flow_root_namespace *ns,
 	int err;
 
 	if ((MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_IB) &&
-	    underlay_qpn == 0)
+	    underlay_qpn == 0 &&
+	    (ft->type != FS_FT_RDMA_RX && ft->type != FS_FT_RDMA_TX))
 		return 0;
 
 	if (ft->type == FS_FT_FDB &&

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

@@ -3665,8 +3665,7 @@ int mlx5_fs_core_init(struct mlx5_core_dev *dev)
 			goto err;
 	}
 
-	if (MLX5_CAP_FLOWTABLE_RDMA_RX(dev, ft_support) &&
-	    MLX5_CAP_FLOWTABLE_RDMA_RX(dev, table_miss_action_domain)) {
+	if (MLX5_CAP_FLOWTABLE_RDMA_RX(dev, ft_support)) {
 		err = init_rdma_rx_root_ns(steering);
 		if (err)
 			goto err;