net/mlx5e: Add support to get ethtool flow rules

Enhance the existing get_rxnfc callback:
1. Get flow rule of specific ID.
2. Get all flow rules.
3. Get number of rules.

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>

3 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 9842594f5980..1365cdc81838 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -717,6 +717,10 @@ int mlx5e_create_flow_steering(struct mlx5e_priv *priv);
 void mlx5e_destroy_flow_steering(struct mlx5e_priv *priv);
 void mlx5e_init_l2_addr(struct mlx5e_priv *priv);
 void mlx5e_destroy_flow_table(struct mlx5e_flow_table *ft);
+int mlx5e_ethtool_get_flow(struct mlx5e_priv *priv, struct ethtool_rxnfc *info,
+                           int location);
+int mlx5e_ethtool_get_all_flows(struct mlx5e_priv *priv,
+                                struct ethtool_rxnfc *info, u32 *rule_locs);
 int mlx5e_ethtool_flow_replace(struct mlx5e_priv *priv,
                                struct ethtool_rx_flow_spec *fs);
 int mlx5e_ethtool_flow_remove(struct mlx5e_priv *priv,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index edbb665f4d22..d652aa917130 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -931,6 +931,15 @@ static int mlx5e_get_rxnfc(struct net_device *netdev,
         case ETHTOOL_GRXRINGS:
                 info->data = priv->params.num_channels;
                 break;
+        case ETHTOOL_GRXCLSRLCNT:
+                info->rule_cnt = priv->fs.ethtool.tot_num_rules;
+                break;
+        case ETHTOOL_GRXCLSRULE:
+                err = mlx5e_ethtool_get_flow(priv, info, info->fs.location);
+                break;
+        case ETHTOOL_GRXCLSRLALL:
+                err = mlx5e_ethtool_get_all_flows(priv, info, rule_locs);
+                break;
         default:
                 err = -EOPNOTSUPP;
                 break;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_fs_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_fs_ethtool.c
index 830106ede872..d17c24227900 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs_ethtool.c
@@ -537,6 +537,40 @@ out:
         return err;
 }
 
+int mlx5e_ethtool_get_flow(struct mlx5e_priv *priv, struct ethtool_rxnfc *info,
+                           int location)
+{
+        struct mlx5e_ethtool_rule *eth_rule;
+
+        if (location < 0 || location >= MAX_NUM_OF_ETHTOOL_RULES)
+                return -EINVAL;
+
+        list_for_each_entry(eth_rule, &priv->fs.ethtool.rules, list) {
+                if (eth_rule->flow_spec.location == location) {
+                        info->fs = eth_rule->flow_spec;
+                        return 0;
+                }
+        }
+
+        return -ENOENT;
+}
+
+int mlx5e_ethtool_get_all_flows(struct mlx5e_priv *priv, struct ethtool_rxnfc *info,
+                                u32 *rule_locs)
+{
+        int location = 0;
+        int idx = 0;
+        int err = 0;
+
+        while ((!err || err == -ENOENT) && idx < info->rule_cnt) {
+                err = mlx5e_ethtool_get_flow(priv, info, location);
+                if (!err)
+                        rule_locs[idx++] = location;
+                location++;
+        }
+        return err;
+}
+
 void mlx5e_ethtool_cleanup_steering(struct mlx5e_priv *priv)
 {
         struct mlx5e_ethtool_rule *iter;