net/mlx5e: Fix allowed tc redirect merged eswitch offload cases

After changing the parent_id to be the same for both NICs of same
The cited commit wrongly allow offload of tc redirect flows from
VF to uplink and vice versa when devcies are on different eswitch,
these cases aren't supported by HW.

Disallow the above offloads when devcies are on different eswitch
and VF LAG is not configured.

Fixes: f6dc1264f1c0 ("net/mlx5e: Disallow tc redirect offload cases we don't support")
Signed-off-by: Maor Dickman <maord@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

3 files changed, 41 insertions, 14 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index f372e94948fd64..cdecf4280e868d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -1484,13 +1484,9 @@ bool mlx5e_eswitch_uplink_rep(struct net_device *netdev)
 	return netdev->netdev_ops == &mlx5e_netdev_ops_uplink_rep;
 }
 
-bool mlx5e_eswitch_rep(struct net_device *netdev)
+bool mlx5e_eswitch_vf_rep(struct net_device *netdev)
 {
-	if (netdev->netdev_ops == &mlx5e_netdev_ops_rep ||
-	    netdev->netdev_ops == &mlx5e_netdev_ops_uplink_rep)
-		return true;
-
-	return false;
+	return netdev->netdev_ops == &mlx5e_netdev_ops_rep;
 }
 
 static void mlx5e_build_rep_params(struct net_device *netdev)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
index 6a233790042002..612b5cf0673d1b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
@@ -210,8 +210,13 @@ void mlx5e_rep_encap_entry_detach(struct mlx5e_priv *priv,
 
 void mlx5e_rep_queue_neigh_stats_work(struct mlx5e_priv *priv);
 
-bool mlx5e_eswitch_rep(struct net_device *netdev);
+bool mlx5e_eswitch_vf_rep(struct net_device *netdev);
 bool mlx5e_eswitch_uplink_rep(struct net_device *netdev);
+static inline bool mlx5e_eswitch_rep(struct net_device *netdev)
+{
+	return mlx5e_eswitch_vf_rep(netdev) ||
+	       mlx5e_eswitch_uplink_rep(netdev);
+}
 
 #else /* CONFIG_MLX5_ESWITCH */
 static inline bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv) { return false; }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index a574c588269a0f..5bcf95fcdd59f0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3073,6 +3073,11 @@ static bool actions_match_supported(struct mlx5e_priv *priv,
 	return true;
 }
 
+static bool same_port_devs(struct mlx5e_priv *priv, struct mlx5e_priv *peer_priv)
+{
+	return priv->mdev == peer_priv->mdev;
+}
+
 static bool same_hw_devs(struct mlx5e_priv *priv, struct mlx5e_priv *peer_priv)
 {
 	struct mlx5_core_dev *fmdev, *pmdev;
@@ -3291,7 +3296,7 @@ static inline int hash_encap_info(struct encap_key *key)
 }
 
 
-static bool is_merged_eswitch_dev(struct mlx5e_priv *priv,
+static bool is_merged_eswitch_vfs(struct mlx5e_priv *priv,
 				  struct net_device *peer_netdev)
 {
 	struct mlx5e_priv *peer_priv;
@@ -3299,13 +3304,11 @@ static bool is_merged_eswitch_dev(struct mlx5e_priv *priv,
 	peer_priv = netdev_priv(peer_netdev);
 
 	return (MLX5_CAP_ESW(priv->mdev, merged_eswitch) &&
-		mlx5e_eswitch_rep(priv->netdev) &&
-		mlx5e_eswitch_rep(peer_netdev) &&
+		mlx5e_eswitch_vf_rep(priv->netdev) &&
+		mlx5e_eswitch_vf_rep(peer_netdev) &&
 		same_hw_devs(priv, peer_priv));
 }
 
-
-
 bool mlx5e_encap_take(struct mlx5e_encap_entry *e)
 {
 	return refcount_inc_not_zero(&e->refcnt);
@@ -3575,14 +3578,37 @@ static int add_vlan_pop_action(struct mlx5e_priv *priv,
 	return err;
 }
 
+static bool same_hw_reps(struct mlx5e_priv *priv,
+			 struct net_device *peer_netdev)
+{
+	struct mlx5e_priv *peer_priv;
+
+	peer_priv = netdev_priv(peer_netdev);
+
+	return mlx5e_eswitch_rep(priv->netdev) &&
+	       mlx5e_eswitch_rep(peer_netdev) &&
+	       same_hw_devs(priv, peer_priv);
+}
+
+static bool is_lag_dev(struct mlx5e_priv *priv,
+		       struct net_device *peer_netdev)
+{
+	return ((mlx5_lag_is_sriov(priv->mdev) ||
+		 mlx5_lag_is_multipath(priv->mdev)) &&
+		 same_hw_reps(priv, peer_netdev));
+}
+
 bool mlx5e_is_valid_eswitch_fwd_dev(struct mlx5e_priv *priv,
 				    struct net_device *out_dev)
 {
-	if (is_merged_eswitch_dev(priv, out_dev))
+	if (is_merged_eswitch_vfs(priv, out_dev))
+		return true;
+
+	if (is_lag_dev(priv, out_dev))
 		return true;
 
 	return mlx5e_eswitch_rep(out_dev) &&
-	       same_hw_devs(priv, netdev_priv(out_dev));
+	       same_port_devs(priv, netdev_priv(out_dev));
 }
 
 static bool is_duplicated_output_device(struct net_device *dev,