net/mlx5: E-switch, Create a second level FDB flow table

If firmware supports the forward action with a destination list
that includes a flow table, create a second level FDB flow table.

This is going to be used for flow based mirroring under the switchdev
offloads mode.

Signed-off-by: Chris Mi <chrism@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

1 files changed, 27 insertions, 4 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index bb8eac5523a7..8ea11f24380c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -454,7 +454,7 @@ static int esw_create_offloads_fast_fdb_table(struct mlx5_eswitch *esw)
 	if (!root_ns) {
 		esw_warn(dev, "Failed to get FDB flow namespace\n");
 		err = -EOPNOTSUPP;
-		goto out;
+		goto out_namespace;
 	}
 
 	esw_debug(dev, "Create offloads FDB table, min (max esw size(2^%d), max counters(%d)*groups(%d))\n",
@@ -464,6 +464,9 @@ static int esw_create_offloads_fast_fdb_table(struct mlx5_eswitch *esw)
 	esw_size = min_t(int, max_flow_counter * ESW_OFFLOADS_NUM_GROUPS,
 			 1 << MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size));
 
+	if (mlx5_esw_has_fwd_fdb(dev))
+		esw_size >>= 1;
+
 	if (esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE)
 		flags |= MLX5_FLOW_TABLE_TUNNEL_EN;
 
@@ -474,16 +477,36 @@ static int esw_create_offloads_fast_fdb_table(struct mlx5_eswitch *esw)
 	if (IS_ERR(fdb)) {
 		err = PTR_ERR(fdb);
 		esw_warn(dev, "Failed to create Fast path FDB Table err %d\n", err);
-		goto out;
+		goto out_namespace;
 	}
 	esw->fdb_table.offloads.fast_fdb = fdb;
 
-out:
+	if (!mlx5_esw_has_fwd_fdb(dev))
+		goto out_namespace;
+
+	fdb = mlx5_create_auto_grouped_flow_table(root_ns, FDB_FAST_PATH,
+						  esw_size,
+						  ESW_OFFLOADS_NUM_GROUPS, 1,
+						  flags);
+	if (IS_ERR(fdb)) {
+		err = PTR_ERR(fdb);
+		esw_warn(dev, "Failed to create fwd table err %d\n", err);
+		goto out_ft;
+	}
+	esw->fdb_table.offloads.fwd_fdb = fdb;
+
+	return err;
+
+out_ft:
+	mlx5_destroy_flow_table(esw->fdb_table.offloads.fast_fdb);
+out_namespace:
 	return err;
 }
 
 static void esw_destroy_offloads_fast_fdb_table(struct mlx5_eswitch *esw)
 {
+	if (mlx5_esw_has_fwd_fdb(esw->dev))
+		mlx5_destroy_flow_table(esw->fdb_table.offloads.fwd_fdb);
 	mlx5_destroy_flow_table(esw->fdb_table.offloads.fast_fdb);
 }
 
@@ -588,7 +611,7 @@ miss_err:
 send_vport_err:
 	mlx5_destroy_flow_table(esw->fdb_table.offloads.slow_fdb);
 slow_fdb_err:
-	mlx5_destroy_flow_table(esw->fdb_table.offloads.fast_fdb);
+	esw_destroy_offloads_fast_fdb_table(esw);
 fast_fdb_err:
 ns_err:
 	kvfree(flow_group_in);