net/mlx5: Check IPsec TX flow steering namespace in advance

Ensure that flow steering is usable as early as possible, to understand
if crypto IPsec is supported or not.
Reviewed-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en/fs.h

@@ -164,7 +164,6 @@ struct mlx5e_ptp_fs;
 
 struct mlx5e_flow_steering {
 	struct mlx5_flow_namespace      *ns;
-	struct mlx5_flow_namespace      *egress_ns;
 #ifdef CONFIG_MLX5_EN_RXNFC
 	struct mlx5e_ethtool_steering   ethtool;
 #endif

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c

@@ -415,6 +415,7 @@ int mlx5e_ipsec_init(struct mlx5e_priv *priv)
 
 	hash_init(ipsec->sadb_rx);
 	spin_lock_init(&ipsec->sadb_rx_lock);
+	ipsec->mdev = priv->mdev;
 	ipsec->en_priv = priv;
 	ipsec->wq = alloc_ordered_workqueue("mlx5e_ipsec: %s", 0,
 					    priv->netdev->name);

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h

@@ -61,6 +61,7 @@ struct mlx5e_accel_fs_esp;
 struct mlx5e_ipsec_tx;
 
 struct mlx5e_ipsec {
+	struct mlx5_core_dev *mdev;
 	struct mlx5e_priv *en_priv;
 	DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
 	spinlock_t sadb_rx_lock; /* Protects sadb_rx */

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c

@@ -35,6 +35,7 @@ struct mlx5e_accel_fs_esp {
 };
 
 struct mlx5e_ipsec_tx {
+	struct mlx5_flow_namespace *ns;
 	struct mlx5_flow_table *ft;
 	struct mutex mutex; /* Protect IPsec TX steering */
 	u32 refcnt;
@@ -338,15 +339,9 @@ static int tx_create(struct mlx5e_priv *priv)
 	struct mlx5_flow_table *ft;
 	int err;
 
-	priv->fs.egress_ns =
-		mlx5_get_flow_namespace(priv->mdev,
-					MLX5_FLOW_NAMESPACE_EGRESS_KERNEL);
-	if (!priv->fs.egress_ns)
-		return -EOPNOTSUPP;
-
 	ft_attr.max_fte = NUM_IPSEC_FTE;
 	ft_attr.autogroup.max_num_groups = 1;
-	ft = mlx5_create_auto_grouped_flow_table(priv->fs.egress_ns, &ft_attr);
+	ft = mlx5_create_auto_grouped_flow_table(ipsec->tx_fs->ns, &ft_attr);
 	if (IS_ERR(ft)) {
 		err = PTR_ERR(ft);
 		netdev_err(priv->netdev, "fail to create ipsec tx ft err=%d\n", err);
@@ -658,9 +653,15 @@ int mlx5e_accel_ipsec_fs_init(struct mlx5e_ipsec *ipsec)
 {
 	struct mlx5e_accel_fs_esp_prot *fs_prot;
 	struct mlx5e_accel_fs_esp *accel_esp;
+	struct mlx5_flow_namespace *ns;
 	enum accel_fs_esp_type i;
 	int err = -ENOMEM;
 
+	ns = mlx5_get_flow_namespace(ipsec->mdev,
+				     MLX5_FLOW_NAMESPACE_EGRESS_KERNEL);
+	if (!ns)
+		return -EOPNOTSUPP;
+
 	ipsec->tx_fs = kzalloc(sizeof(*ipsec->tx_fs), GFP_KERNEL);
 	if (!ipsec->tx_fs)
 		return -ENOMEM;
@@ -670,6 +671,7 @@ int mlx5e_accel_ipsec_fs_init(struct mlx5e_ipsec *ipsec)
 		goto err_rx;
 
 	mutex_init(&ipsec->tx_fs->mutex);
+	ipsec->tx_fs->ns = ns;
 
 	accel_esp = ipsec->rx_fs;
 	for (i = 0; i < ACCEL_FS_ESP_NUM_TYPES; i++) {