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>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index d1a3f7fcca1c683bc9050e9733ecdd0d8ec081b5..d06c1162912175bfda9670ea2f156249c0d44e4b 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -55,6 +55,9 @@
 #define MLX5_RATE_TO_BW_SHARE(rate, divider, limit) \
        min_t(u32, max_t(u32, (rate) / (divider), MLX5_MIN_BW_SHARE), limit)
 
+#define mlx5_esw_has_fwd_fdb(dev) \
+       MLX5_CAP_ESW_FLOWTABLE(dev, fdb_multi_path_to_table)
+
 struct vport_ingress {
        struct mlx5_flow_table *acl;
        struct mlx5_flow_group *allow_untagged_spoofchk_grp;
@@ -127,6 +130,7 @@ struct mlx5_eswitch_fdb {
 
                struct offloads_fdb {
                        struct mlx5_flow_table *fast_fdb;
+                       struct mlx5_flow_table *fwd_fdb;
                        struct mlx5_flow_table *slow_fdb;
                        struct mlx5_flow_group *send_to_vport_grp;
                        struct mlx5_flow_group *miss_grp;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index bb8eac5523a7ba3bdc047b845e6cd3015f8df478..8ea11f24380ce07ff177171ce1ba21bcb0481a4f 100644 (file)
--- 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);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 806e95523f9e5eb964150a276b60816e079b4023..f9c2c03083ebb31fda08ada6bb7e8005ad9a309d 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -2495,7 +2495,7 @@ static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
        if (!steering->fdb_root_ns)
                return -ENOMEM;
 
-       prio = fs_create_prio(&steering->fdb_root_ns->ns, 0, 1);
+       prio = fs_create_prio(&steering->fdb_root_ns->ns, 0, 2);
        if (IS_ERR(prio))
                goto out_err;