net/mlx5e: Add TC offload support for the VF representors netdevice

The VF representors support only TC filter/action offloads
(not mqprio) and this is enabled for them by default.
Signed-off-by: NOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/en_rep.c

@@ -33,6 +33,7 @@
 #include <generated/utsrelease.h>
 #include <linux/mlx5/fs.h>
 #include <net/switchdev.h>
+#include <net/pkt_cls.h>
 
 #include "eswitch.h"
 #include "en.h"
@@ -222,6 +223,29 @@ static int mlx5e_rep_get_phys_port_name(struct net_device *dev,
 	return 0;
 }
 
+static int mlx5e_rep_ndo_setup_tc(struct net_device *dev, u32 handle,
+				  __be16 proto, struct tc_to_netdev *tc)
+{
+	struct mlx5e_priv *priv = netdev_priv(dev);
+
+	if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
+		return -EOPNOTSUPP;
+
+	switch (tc->type) {
+	case TC_SETUP_CLSFLOWER:
+		switch (tc->cls_flower->command) {
+		case TC_CLSFLOWER_REPLACE:
+			return mlx5e_configure_flower(priv, proto, tc->cls_flower);
+		case TC_CLSFLOWER_DESTROY:
+			return mlx5e_delete_flower(priv, tc->cls_flower);
+		case TC_CLSFLOWER_STATS:
+			return mlx5e_stats_flower(priv, tc->cls_flower);
+		}
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static const struct switchdev_ops mlx5e_rep_switchdev_ops = {
 	.switchdev_port_attr_get	= mlx5e_attr_get,
 };
@@ -231,6 +255,7 @@ static const struct net_device_ops mlx5e_netdev_ops_rep = {
 	.ndo_stop                = mlx5e_close,
 	.ndo_start_xmit          = mlx5e_xmit,
 	.ndo_get_phys_port_name  = mlx5e_rep_get_phys_port_name,
+	.ndo_setup_tc            = mlx5e_rep_ndo_setup_tc,
 	.ndo_get_stats64         = mlx5e_get_stats,
 };
 
@@ -284,7 +309,8 @@ static void mlx5e_build_rep_netdev(struct net_device *netdev)
 	netdev->switchdev_ops = &mlx5e_rep_switchdev_ops;
 #endif
 
-	netdev->features	 |= NETIF_F_VLAN_CHALLENGED;
+	netdev->features	 |= NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_TC;
+	netdev->hw_features      |= NETIF_F_HW_TC;
 
 	eth_hw_addr_random(netdev);
 }
@@ -328,8 +354,14 @@ static int mlx5e_init_rep_rx(struct mlx5e_priv *priv)
 	}
 	rep->vport_rx_rule = flow_rule;
 
+	err = mlx5e_tc_init(priv);
+	if (err)
+		goto err_del_flow_rule;
+
 	return 0;
 
+err_del_flow_rule:
+	mlx5_del_flow_rule(rep->vport_rx_rule);
 err_destroy_direct_tirs:
 	mlx5e_destroy_direct_tirs(priv);
 err_destroy_direct_rqts:
@@ -343,6 +375,7 @@ static void mlx5e_cleanup_rep_rx(struct mlx5e_priv *priv)
 	struct mlx5_eswitch_rep *rep = priv->ppriv;
 	int i;
 
+	mlx5e_tc_cleanup(priv);
 	mlx5_del_flow_rule(rep->vport_rx_rule);
 	mlx5e_destroy_direct_tirs(priv);
 	for (i = 0; i < priv->params.num_channels; i++)