net/mlx5: DR, Add check for multi destination FTE

The driver should not allow rule that forward to more than one FT in TX
flow unless there is a specific support from the FW.

Signed-off-by: Erez Shitrit <erezsh@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c
index 5b83da08692d69a0b584d6a48e8b68df3afc52e5..7179542e9164018365b2159122fe923f995171fc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c
@@ -55,6 +55,12 @@ static const char *dr_action_id_to_str(enum mlx5dr_action_type action_id)
        return action_type_to_str[action_id];
 }
 
+static bool mlx5dr_action_supp_fwd_fdb_multi_ft(struct mlx5_core_dev *dev)
+{
+       return (MLX5_CAP_ESW_FLOWTABLE(dev, fdb_multi_path_any_table_limit_regc) ||
+               MLX5_CAP_ESW_FLOWTABLE(dev, fdb_multi_path_any_table));
+}
+
 static const enum dr_action_valid_state
 next_action_state[DR_ACTION_DOMAIN_MAX][DR_ACTION_STATE_MAX][DR_ACTION_TYP_MAX] = {
        [DR_ACTION_DOMAIN_NIC_INGRESS] = {
@@ -1167,6 +1173,7 @@ mlx5dr_action_create_mult_dest_tbl(struct mlx5dr_domain *dmn,
        struct mlx5dr_action **ref_actions;
        struct mlx5dr_action *action;
        bool reformat_req = false;
+       u16 num_dst_ft = 0;
        u32 num_of_ref = 0;
        u32 ref_act_cnt;
        int ret;
@@ -1210,6 +1217,12 @@ mlx5dr_action_create_mult_dest_tbl(struct mlx5dr_domain *dmn,
                        break;
 
                case DR_ACTION_TYP_FT:
+                       if (num_dst_ft &&
+                           !mlx5dr_action_supp_fwd_fdb_multi_ft(dmn->mdev)) {
+                               mlx5dr_dbg(dmn, "multiple FT destinations not supported\n");
+                               goto free_ref_actions;
+                       }
+                       num_dst_ft++;
                        hw_dests[i].type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
                        if (dest_action->dest_tbl->is_fw_tbl)
                                hw_dests[i].ft_id = dest_action->dest_tbl->fw_tbl.id;