net/mlx5e: TX, Inline TLS skb check

When TLS is supported and enabled, every transmitted packet is tested
to identify if TLS offload is required.

Take the early-return condition into an inline function, to save
the overhead of a function call for non-TLS packets.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -124,8 +124,9 @@ static inline bool mlx5e_accel_tx_begin(struct net_device *dev,
 
 #ifdef CONFIG_MLX5_EN_TLS
 	/* May send SKBs and WQEs. */
-	if (unlikely(!mlx5e_tls_handle_tx_skb(dev, sq, skb, &state->tls)))
-		return false;
+	if (mlx5e_tls_skb_offloaded(skb))
+		if (unlikely(!mlx5e_tls_handle_tx_skb(dev, sq, skb, &state->tls)))
+			return false;
 #endif
 
 #ifdef CONFIG_MLX5_EN_IPSEC

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

@@ -263,9 +263,6 @@ bool mlx5e_tls_handle_tx_skb(struct net_device *netdev, struct mlx5e_txqsq *sq,
 	int datalen;
 	u32 skb_seq;
 
-	if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
-		return true;
-
 	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
 	if (!datalen)
 		return true;

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

@@ -47,6 +47,12 @@ u16 mlx5e_tls_get_stop_room(struct mlx5_core_dev *mdev, struct mlx5e_params *par
 
 bool mlx5e_tls_handle_tx_skb(struct net_device *netdev, struct mlx5e_txqsq *sq,
 			     struct sk_buff *skb, struct mlx5e_accel_tx_tls_state *state);
+
+static inline bool mlx5e_tls_skb_offloaded(struct sk_buff *skb)
+{
+	return skb->sk && tls_is_sk_tx_device_offloaded(skb->sk);
+}
+
 void mlx5e_tls_handle_tx_wqe(struct mlx5e_txqsq *sq, struct mlx5_wqe_ctrl_seg *cseg,
 			     struct mlx5e_accel_tx_tls_state *state);