net/mlx5: Lag, support single FDB only on 2 ports

E-Switch currently doesn't support more than 2 E-Switch managers being aggregated under a single hardware lag. Have specific checks to disallow creating lag when the code doesn't support it. Signed-off-by: Mark Bloch <[email protected]> Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Saeed Mahameed <[email protected]>
chewitt · May 10, 2022 · e2c4593 · e2c4593
1 parent e9d5bb5
commit e2c4593
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -458,6 +458,7 @@ static int mlx5_deactivate_lag(struct mlx5_lag *ldev)
 	return 0;
 }
 
+#define MLX5_LAG_OFFLOADS_SUPPORTED_PORTS 2
 static bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
 {
 #ifdef CONFIG_MLX5_ESWITCH
@@ -470,6 +471,9 @@ static bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
 #ifdef CONFIG_MLX5_ESWITCH
 	mode = mlx5_eswitch_mode(ldev->pf[MLX5_LAG_P1].dev);
 
+	if (mode == MLX5_ESWITCH_OFFLOADS && ldev->ports != MLX5_LAG_OFFLOADS_SUPPORTED_PORTS)
+		return false;
+
 	return (mode == MLX5_ESWITCH_NONE || mode == MLX5_ESWITCH_OFFLOADS) &&
 		(mlx5_eswitch_mode(ldev->pf[MLX5_LAG_P1].dev) ==
 		 mlx5_eswitch_mode(ldev->pf[MLX5_LAG_P2].dev));