net/mlx5: Add user chosen levels when allocating flow tables

Currently, consumers of the flow steering infrastructure can't
choose their own flow table levels and are limited to one
flow table per level. This just waste levels.
Instead, we introduce here the possibility to use multiple
flow tables in a level. The user is free to connect these
flow tables, while following the rule (FTEs in FT of level x
could only point to FTs of level y where y > x).

In addition this patch switch the order of the create/destroy
flow tables of the NIC(vlan and main).

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 99eb1c1a3b7ba5905584bc9afea020b101806dcb..3ff663c35bacb36aafc5c092c001c0bddfe4aeda 100644 (file)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1438,7 +1438,8 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
        if (!ft) {
                ft = mlx5_create_auto_grouped_flow_table(ns, priority,
                                                         num_entries,
-                                                        num_groups);
+                                                        num_groups,
+                                                        0);
 
                if (!IS_ERR(ft)) {
                        prio->refcount = 0;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
index 4df49e660587ac6ed19f498af68e4b626e475864..d61171ae0168189f7ededfceda90e916650cbedf 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
@@ -37,6 +37,11 @@
 #include <linux/mlx5/fs.h>
 #include "en.h"
 
+enum {
+       MLX5E_VLAN_FT_LEVEL = 0,
+       MLX5E_MAIN_FT_LEVEL
+};
+
 #define MLX5_SET_CFG(p, f, v) MLX5_SET(create_flow_group_in, p, f, v)
 
 enum {
@@ -1041,7 +1046,8 @@ static int mlx5e_create_main_flow_table(struct mlx5e_priv *priv)
        int err;
 
        ft->num_groups = 0;
-       ft->t = mlx5_create_flow_table(priv->fts.ns, 1, MLX5E_MAIN_TABLE_SIZE);
+       ft->t = mlx5_create_flow_table(priv->fts.ns, 1, MLX5E_MAIN_TABLE_SIZE,
+                                      MLX5E_MAIN_FT_LEVEL);
 
        if (IS_ERR(ft->t)) {
                err = PTR_ERR(ft->t);
@@ -1150,7 +1156,8 @@ static int mlx5e_create_vlan_flow_table(struct mlx5e_priv *priv)
        int err;
 
        ft->num_groups = 0;
-       ft->t = mlx5_create_flow_table(priv->fts.ns, 1, MLX5E_VLAN_TABLE_SIZE);
+       ft->t = mlx5_create_flow_table(priv->fts.ns, 1, MLX5E_VLAN_TABLE_SIZE,
+                                      MLX5E_VLAN_FT_LEVEL);
 
        if (IS_ERR(ft->t)) {
                err = PTR_ERR(ft->t);
@@ -1167,11 +1174,16 @@ static int mlx5e_create_vlan_flow_table(struct mlx5e_priv *priv)
        if (err)
                goto err_free_g;
 
+       err = mlx5e_add_vlan_rule(priv, MLX5E_VLAN_RULE_TYPE_UNTAGGED, 0);
+       if (err)
+               goto err_destroy_vlan_flow_groups;
+
        return 0;
 
+err_destroy_vlan_flow_groups:
+       mlx5e_destroy_groups(ft);
 err_free_g:
        kfree(ft->g);
-
 err_destroy_vlan_flow_table:
        mlx5_destroy_flow_table(ft->t);
        ft->t = NULL;
@@ -1194,15 +1206,11 @@ int mlx5e_create_flow_tables(struct mlx5e_priv *priv)
        if (!priv->fts.ns)
                return -EINVAL;
 
-       err = mlx5e_create_vlan_flow_table(priv);
-       if (err)
-               return err;
-
        err = mlx5e_create_main_flow_table(priv);
        if (err)
-               goto err_destroy_vlan_flow_table;
+               return err;
 
-       err = mlx5e_add_vlan_rule(priv, MLX5E_VLAN_RULE_TYPE_UNTAGGED, 0);
+       err = mlx5e_create_vlan_flow_table(priv);
        if (err)
                goto err_destroy_main_flow_table;
 
@@ -1210,8 +1218,6 @@ int mlx5e_create_flow_tables(struct mlx5e_priv *priv)
 
 err_destroy_main_flow_table:
        mlx5e_destroy_main_flow_table(priv);
-err_destroy_vlan_flow_table:
-       mlx5e_destroy_vlan_flow_table(priv);
 
        return err;
 }
@@ -1219,6 +1225,6 @@ err_destroy_vlan_flow_table:
 void mlx5e_destroy_flow_tables(struct mlx5e_priv *priv)
 {
        mlx5e_del_vlan_rule(priv, MLX5E_VLAN_RULE_TYPE_UNTAGGED, 0);
-       mlx5e_destroy_main_flow_table(priv);
        mlx5e_destroy_vlan_flow_table(priv);
+       mlx5e_destroy_main_flow_table(priv);
 }

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index b3de09f13425f39bc0afbc70e8966dcc36d49206..2137387c043d102590ce140b341e043fc86ab3ef 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -64,7 +64,8 @@ static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
                priv->fts.tc.t =
                        mlx5_create_auto_grouped_flow_table(priv->fts.ns, 0,
                                                            MLX5E_TC_FLOW_TABLE_NUM_ENTRIES,
-                                                           MLX5E_TC_FLOW_TABLE_NUM_GROUPS);
+                                                           MLX5E_TC_FLOW_TABLE_NUM_GROUPS,
+                                                           0);
                if (IS_ERR(priv->fts.tc.t)) {
                        netdev_err(priv->netdev,
                                   "Failed to create tc offload table\n");

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index bc3d9f8a75c1d86532d9b579b4b8c6f8a36f9f46..ff91bb5e1c43a96b3833c45445c8e9bf0c461211 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -401,7 +401,7 @@ static int esw_create_fdb_table(struct mlx5_eswitch *esw, int nvports)
        memset(flow_group_in, 0, inlen);
 
        table_size = BIT(MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size));
-       fdb = mlx5_create_flow_table(root_ns, 0, table_size);
+       fdb = mlx5_create_flow_table(root_ns, 0, table_size, 0);
        if (IS_ERR_OR_NULL(fdb)) {
                err = PTR_ERR(fdb);
                esw_warn(dev, "Failed to create FDB Table err %d\n", err);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index cfb35c334cd141d6b192072d4a8447da1f4321f5..ca55d7e30e5c8ab1a2764027be1f124b95e39334 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -225,19 +225,6 @@ static struct fs_prio *find_prio(struct mlx5_flow_namespace *ns,
        return NULL;
 }
 
-static unsigned int find_next_free_level(struct fs_prio *prio)
-{
-       if (!list_empty(&prio->node.children)) {
-               struct mlx5_flow_table *ft;
-
-               ft = list_last_entry(&prio->node.children,
-                                    struct mlx5_flow_table,
-                                    node.list);
-               return ft->level + 1;
-       }
-       return prio->start_level;
-}
-
 static bool masked_memcmp(void *mask, void *val1, void *val2, size_t size)
 {
        unsigned int i;
@@ -696,9 +683,23 @@ static int connect_flow_table(struct mlx5_core_dev *dev, struct mlx5_flow_table
        return err;
 }
 
+static void list_add_flow_table(struct mlx5_flow_table *ft,
+                               struct fs_prio *prio)
+{
+       struct list_head *prev = &prio->node.children;
+       struct mlx5_flow_table *iter;
+
+       fs_for_each_ft(iter, prio) {
+               if (iter->level > ft->level)
+                       break;
+               prev = &iter->node.list;
+       }
+       list_add(&ft->node.list, prev);
+}
+
 struct mlx5_flow_table *mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
-                                              int prio,
-                                              int max_fte)
+                                              int prio, int max_fte,
+                                              u32 level)
 {
        struct mlx5_flow_table *next_ft = NULL;
        struct mlx5_flow_table *ft;
@@ -719,12 +720,15 @@ struct mlx5_flow_table *mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
                err = -EINVAL;
                goto unlock_root;
        }
-       if (fs_prio->num_ft == fs_prio->num_levels) {
+       if (level >= fs_prio->num_levels) {
                err = -ENOSPC;
                goto unlock_root;
        }
-
-       ft = alloc_flow_table(find_next_free_level(fs_prio),
+       /* The level is related to the
+        * priority level range.
+        */
+       level += fs_prio->start_level;
+       ft = alloc_flow_table(level,
                              roundup_pow_of_two(max_fte),
                              root->table_type);
        if (!ft) {
@@ -745,7 +749,7 @@ struct mlx5_flow_table *mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
                goto destroy_ft;
        lock_ref_node(&fs_prio->node);
        tree_add_node(&ft->node, &fs_prio->node);
-       list_add_tail(&ft->node.list, &fs_prio->node.children);
+       list_add_flow_table(ft, fs_prio);
        fs_prio->num_ft++;
        unlock_ref_node(&fs_prio->node);
        mutex_unlock(&root->chain_lock);
@@ -762,14 +766,15 @@ unlock_root:
 struct mlx5_flow_table *mlx5_create_auto_grouped_flow_table(struct mlx5_flow_namespace *ns,
                                                            int prio,
                                                            int num_flow_table_entries,
-                                                           int max_num_groups)
+                                                           int max_num_groups,
+                                                           u32 level)
 {
        struct mlx5_flow_table *ft;
 
        if (max_num_groups > num_flow_table_entries)
                return ERR_PTR(-EINVAL);
 
-       ft = mlx5_create_flow_table(ns, prio, num_flow_table_entries);
+       ft = mlx5_create_flow_table(ns, prio, num_flow_table_entries, level);
        if (IS_ERR(ft))
                return ft;
 
@@ -1068,6 +1073,20 @@ unlock_fg:
        return rule;
 }
 
+static bool dest_is_valid(struct mlx5_flow_destination *dest,
+                         u32 action,
+                         struct mlx5_flow_table *ft)
+{
+       if (!(action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))
+               return true;
+
+       if (!dest || ((dest->type ==
+           MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE) &&
+           (dest->ft->level <= ft->level)))
+               return false;
+       return true;
+}
+
 static struct mlx5_flow_rule *
 _mlx5_add_flow_rule(struct mlx5_flow_table *ft,
                    u8 match_criteria_enable,
@@ -1080,7 +1099,7 @@ _mlx5_add_flow_rule(struct mlx5_flow_table *ft,
        struct mlx5_flow_group *g;
        struct mlx5_flow_rule *rule;
 
-       if ((action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) && !dest)
+       if (!dest_is_valid(dest, action, ft))
                return ERR_PTR(-EINVAL);
 
        nested_lock_ref_node(&ft->node, FS_MUTEX_GRANDPARENT);
@@ -1517,6 +1536,7 @@ static void set_prio_attrs(struct mlx5_flow_root_namespace *root_ns)
 
 #define ANCHOR_PRIO 0
 #define ANCHOR_SIZE 1
+#define ANCHOR_LEVEL 0
 static int create_anchor_flow_table(struct mlx5_core_dev
                                                        *dev)
 {
@@ -1526,7 +1546,7 @@ static int create_anchor_flow_table(struct mlx5_core_dev
        ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_ANCHOR);
        if (!ns)
                return -EINVAL;
-       ft = mlx5_create_flow_table(ns, ANCHOR_PRIO, ANCHOR_SIZE);
+       ft = mlx5_create_flow_table(ns, ANCHOR_PRIO, ANCHOR_SIZE, ANCHOR_LEVEL);
        if (IS_ERR(ft)) {
                mlx5_core_err(dev, "Failed to create last anchor flow table");
                return PTR_ERR(ft);

diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index 28a5b662ab6aa2cc56b273ac526c5f1f6d865272..165ff4f9cc6aa27eb8d0b60103272c9cbf2818ac 100644 (file)
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -82,12 +82,14 @@ struct mlx5_flow_table *
 mlx5_create_auto_grouped_flow_table(struct mlx5_flow_namespace *ns,
                                    int prio,
                                    int num_flow_table_entries,
-                                   int max_num_groups);
+                                   int max_num_groups,
+                                   u32 level);
 
 struct mlx5_flow_table *
 mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
                       int prio,
-                      int num_flow_table_entries);
+                      int num_flow_table_entries,
+                      u32 level);
 int mlx5_destroy_flow_table(struct mlx5_flow_table *ft);
 
 /* inbox should be set with the following values: