net/mlx5e: kTLS, Improve rx handler function call

Prior to this patch mlx5e tls rx handler was called unconditionally on
all rx frames and the decision whether a frame is a valid tls record
is done inside that function.  A function call can be expensive especially
for regular rx packet rate.  To avoid this, check the tls validity before
jumping into the tls rx handler.

While at it, split between kTLS device offload rx handler and FPGA tls rx
handler using a similar method.

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

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.h
index 8bb790674042..5f162ad2ee8f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.h
@@ -34,6 +34,7 @@
 #ifndef __MLX5E_TLS_RXTX_H__
 #define __MLX5E_TLS_RXTX_H__
 
+#include "accel/accel.h"
 #include "en_accel/ktls_txrx.h"
 
 #ifdef CONFIG_MLX5_EN_TLS
@@ -49,11 +50,27 @@ bool mlx5e_tls_handle_tx_skb(struct net_device *netdev, struct mlx5e_txqsq *sq,
 void mlx5e_tls_handle_tx_wqe(struct mlx5e_txqsq *sq, struct mlx5_wqe_ctrl_seg *cseg,
 			     struct mlx5e_accel_tx_tls_state *state);
 
-void mlx5e_tls_handle_rx_skb(struct mlx5e_rq *rq, struct sk_buff *skb,
-			     struct mlx5_cqe64 *cqe, u32 *cqe_bcnt);
+void mlx5e_tls_handle_rx_skb_metadata(struct mlx5e_rq *rq, struct sk_buff *skb,
+				      u32 *cqe_bcnt);
+
+static inline void
+mlx5e_tls_handle_rx_skb(struct mlx5e_rq *rq, struct sk_buff *skb,
+			struct mlx5_cqe64 *cqe, u32 *cqe_bcnt)
+{
+	if (unlikely(get_cqe_tls_offload(cqe))) /* cqe bit indicates a TLS device */
+		return mlx5e_ktls_handle_rx_skb(rq, skb, cqe, cqe_bcnt);
+
+	if (unlikely(test_bit(MLX5E_RQ_STATE_FPGA_TLS, &rq->state) && is_metadata_hdr_valid(skb)))
+		return mlx5e_tls_handle_rx_skb_metadata(rq, skb, cqe_bcnt);
+}
 
 #else
 
+static inline bool
+mlx5e_accel_is_tls(struct mlx5_cqe64 *cqe, struct sk_buff *skb) { return false; }
+static inline void
+mlx5e_tls_handle_rx_skb(struct mlx5e_rq *rq, struct sk_buff *skb,
+			struct mlx5_cqe64 *cqe, u32 *cqe_bcnt) {}
 static inline u16 mlx5e_tls_get_stop_room(struct mlx5e_txqsq *sq)
 {
 	return 0;