net/mlx5e: Add kTLS TX HW offload support

Add support for transmit side kernel-TLS acceleration.
Offload the crypto encryption to HW.

Per TLS connection:
- Use a separate TIS to maintain the HW context.
- Use a separate encryption key.
- Maintain static and progress HW contexts by posting the proper
  WQEs at creation time, or upon resync.
- Use a special DUMP opcode to replay the previous frags and sync
  the HW context.

To make sure the SQ is able to serve an xmit request, increase
SQ stop room to cover:
- static params WQE,
- progress params WQE, and
- resync DUMP per frag.

Currently supporting TLS 1.2, and key size 128bit.

Tested over SimX simulator.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h
index 3f5d72163b56..9015f3f7792d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h
@@ -33,8 +33,10 @@
 #ifndef __MLX5E_TLS_H__
 #define __MLX5E_TLS_H__
 
-#ifdef CONFIG_MLX5_EN_TLS
+#include "accel/tls.h"
+#include "en_accel/ktls.h"
 
+#ifdef CONFIG_MLX5_EN_TLS
 #include <net/tls.h>
 #include "en.h"
 
@@ -94,7 +96,12 @@ int mlx5e_tls_get_stats(struct mlx5e_priv *priv, u64 *data);
 
 #else
 
-static inline void mlx5e_tls_build_netdev(struct mlx5e_priv *priv) { }
+static inline void mlx5e_tls_build_netdev(struct mlx5e_priv *priv)
+{
+	if (mlx5_accel_is_ktls_device(priv->mdev))
+		mlx5e_ktls_build_netdev(priv);
+}
+
 static inline int mlx5e_tls_init(struct mlx5e_priv *priv) { return 0; }
 static inline void mlx5e_tls_cleanup(struct mlx5e_priv *priv) { }
 static inline int mlx5e_tls_get_count(struct mlx5e_priv *priv) { return 0; }