net/mlx5: E-Switch, Enable/disable ACL tables on demand

Enable ingress/egress ACL tables only when we need to configure ACL
rules.
Disable ingress/egress ACL tables once all ACL rules are removed.

All VF outgoing/incoming traffic need to go through the ingress/egress ACL
tables.
Adding/Removing these tables on demand will save unnecessary hops in the
flow steering when the ACL tables are empty.

Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 17d093c..48c8919 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -728,7 +728,8 @@ static void esw_vport_enable_egress_acl(struct mlx5_eswitch *esw,
        int table_size = 2;
        int err = 0;
 
-       if (!MLX5_CAP_ESW_EGRESS_ACL(dev, ft_support))
+       if (!MLX5_CAP_ESW_EGRESS_ACL(dev, ft_support) ||
+           !IS_ERR_OR_NULL(vport->egress.acl))
                return;
 
        esw_debug(dev, "Create vport[%d] egress ACL log_max_size(%d)\n",
@@ -841,7 +842,8 @@ static void esw_vport_enable_ingress_acl(struct mlx5_eswitch *esw,
        int table_size = 4;
        int err = 0;
 
-       if (!MLX5_CAP_ESW_INGRESS_ACL(dev, ft_support))
+       if (!MLX5_CAP_ESW_INGRESS_ACL(dev, ft_support) ||
+           !IS_ERR_OR_NULL(vport->ingress.acl))
                return;
 
        esw_debug(dev, "Create vport[%d] ingress ACL log_max_size(%d)\n",
@@ -989,13 +991,6 @@ static int esw_vport_ingress_config(struct mlx5_eswitch *esw,
        int err = 0;
        u8 *smac_v;
 
-       if (IS_ERR_OR_NULL(vport->ingress.acl)) {
-               esw_warn(esw->dev,
-                        "vport[%d] configure ingress rules failed, ingress acl is not initialized!\n",
-                        vport->vport);
-               return -EPERM;
-       }
-
        if (vport->spoofchk) {
                err = mlx5_query_nic_vport_mac_address(esw->dev, vport->vport, smac);
                if (err) {
@@ -1015,8 +1010,12 @@ static int esw_vport_ingress_config(struct mlx5_eswitch *esw,
 
        esw_vport_cleanup_ingress_rules(esw, vport);
 
-       if (!vport->vlan && !vport->qos && !vport->spoofchk)
+       if (!vport->vlan && !vport->qos && !vport->spoofchk) {
+               esw_vport_disable_ingress_acl(esw, vport);
                return 0;
+       }
+
+       esw_vport_enable_ingress_acl(esw, vport);
 
        esw_debug(esw->dev,
                  "vport[%d] configure ingress rules, vlan(%d) qos(%d)\n",
@@ -1091,16 +1090,14 @@ static int esw_vport_egress_config(struct mlx5_eswitch *esw,
        u32 *match_c;
        int err = 0;
 
-       if (IS_ERR_OR_NULL(vport->egress.acl)) {
-               esw_warn(esw->dev, "vport[%d] configure rgress rules failed, egress acl is not initialized!\n",
-                        vport->vport);
-               return -EPERM;
-       }
-
        esw_vport_cleanup_egress_rules(esw, vport);
 
-       if (!vport->vlan && !vport->qos)
+       if (!vport->vlan && !vport->qos) {
+               esw_vport_disable_egress_acl(esw, vport);
                return 0;
+       }
+
+       esw_vport_enable_egress_acl(esw, vport);
 
        esw_debug(esw->dev,
                  "vport[%d] configure egress rules, vlan(%d) qos(%d)\n",
@@ -1169,8 +1166,6 @@ static void esw_enable_vport(struct mlx5_eswitch *esw, int vport_num,
        esw_debug(esw->dev, "Enabling VPORT(%d)\n", vport_num);
 
        if (vport_num) { /* Only VFs need ACLs for VST and spoofchk filtering */
-               esw_vport_enable_ingress_acl(esw, vport);
-               esw_vport_enable_egress_acl(esw, vport);
                esw_vport_ingress_config(esw, vport);
                esw_vport_egress_config(esw, vport);
        }