net/mlx5: Accel, Add core TLS support for the Connect-X family

Add support for the new TLS implementation of the Connect-X family.
Introduce a new compilation flag MLX5_TLS for it.
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>

drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -134,10 +134,21 @@ config MLX5_FPGA_TLS
 	mlx5_core driver will include the Innova FPGA core and allow building
 	sandbox-specific client drivers.
 
+config MLX5_TLS
+	bool "Mellanox Technologies TLS Connect-X support"
+	depends on MLX5_CORE_EN
+	depends on TLS_DEVICE
+	depends on TLS=y || MLX5_CORE=m
+	select MLX5_ACCEL
+	default n
+	help
+	Build TLS support for the Connect-X family of network cards by Mellanox
+	Technologies.
+
 config MLX5_EN_TLS
 	bool "TLS cryptography-offload accelaration"
 	depends on MLX5_CORE_EN
-	depends on MLX5_FPGA_TLS
+	depends on MLX5_FPGA_TLS || MLX5_TLS
 	default y
 	help
 	Build support for TLS cryptography-offload accelaration in the NIC.

drivers/net/ethernet/mellanox/mlx5/core/accel/tls.c

@@ -35,6 +35,7 @@
 
 #include "accel/tls.h"
 #include "mlx5_core.h"
+#include "lib/mlx5.h"
 
 #ifdef CONFIG_MLX5_FPGA_TLS
 #include "fpga/tls.h"
@@ -63,7 +64,8 @@ int mlx5_accel_tls_resync_rx(struct mlx5_core_dev *mdev, u32 handle, u32 seq,
 
 bool mlx5_accel_is_tls_device(struct mlx5_core_dev *mdev)
 {
-	return mlx5_fpga_is_tls_device(mdev);
+	return mlx5_fpga_is_tls_device(mdev) ||
+		mlx5_accel_is_ktls_device(mdev);
 }
 
 u32 mlx5_accel_tls_device_caps(struct mlx5_core_dev *mdev)
@@ -81,3 +83,41 @@ void mlx5_accel_tls_cleanup(struct mlx5_core_dev *mdev)
 	mlx5_fpga_tls_cleanup(mdev);
 }
 #endif
+
+#ifdef CONFIG_MLX5_TLS
+int mlx5_ktls_create_key(struct mlx5_core_dev *mdev,
+			 struct tls_crypto_info *crypto_info,
+			 u32 *p_key_id)
+{
+	u32 sz_bytes;
+	void *key;
+
+	switch (crypto_info->cipher_type) {
+	case TLS_CIPHER_AES_GCM_128: {
+		struct tls12_crypto_info_aes_gcm_128 *info =
+			(struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
+
+		key      = info->key;
+		sz_bytes = sizeof(info->key);
+		break;
+	}
+	case TLS_CIPHER_AES_GCM_256: {
+		struct tls12_crypto_info_aes_gcm_256 *info =
+			(struct tls12_crypto_info_aes_gcm_256 *)crypto_info;
+
+		key      = info->key;
+		sz_bytes = sizeof(info->key);
+		break;
+	}
+	default:
+		return -EINVAL;
+	}
+
+	return mlx5_create_encryption_key(mdev, key, sz_bytes, p_key_id);
+}
+
+void mlx5_ktls_destroy_key(struct mlx5_core_dev *mdev, u32 key_id)
+{
+	mlx5_destroy_encryption_key(mdev, key_id);
+}
+#endif

drivers/net/ethernet/mellanox/mlx5/core/accel/tls.h

@@ -37,6 +37,50 @@
 #include <linux/mlx5/driver.h>
 #include <linux/tls.h>
 
+#ifdef CONFIG_MLX5_TLS
+int mlx5_ktls_create_key(struct mlx5_core_dev *mdev,
+			 struct tls_crypto_info *crypto_info,
+			 u32 *p_key_id);
+void mlx5_ktls_destroy_key(struct mlx5_core_dev *mdev, u32 key_id);
+
+static inline bool mlx5_accel_is_ktls_device(struct mlx5_core_dev *mdev)
+{
+	if (!MLX5_CAP_GEN(mdev, tls))
+		return false;
+
+	if (!MLX5_CAP_GEN(mdev, log_max_dek))
+		return false;
+
+	return MLX5_CAP_TLS(mdev, tls_1_2_aes_gcm_128);
+}
+
+static inline bool mlx5e_ktls_type_check(struct mlx5_core_dev *mdev,
+					 struct tls_crypto_info *crypto_info)
+{
+	switch (crypto_info->cipher_type) {
+	case TLS_CIPHER_AES_GCM_128:
+		if (crypto_info->version == TLS_1_2_VERSION)
+			return MLX5_CAP_TLS(mdev,  tls_1_2_aes_gcm_128);
+		break;
+	}
+
+	return false;
+}
+#else
+static inline int
+mlx5_ktls_create_key(struct mlx5_core_dev *mdev,
+		     struct tls_crypto_info *crypto_info,
+		     u32 *p_key_id) { return -ENOTSUPP; }
+static inline void
+mlx5_ktls_destroy_key(struct mlx5_core_dev *mdev, u32 key_id) {}
+
+static inline bool
+mlx5_accel_is_ktls_device(struct mlx5_core_dev *mdev) { return false; }
+static inline bool
+mlx5e_ktls_type_check(struct mlx5_core_dev *mdev,
+		      struct tls_crypto_info *crypto_info) { return false; }
+#endif
+
 #ifdef CONFIG_MLX5_FPGA_TLS
 enum {
 	MLX5_ACCEL_TLS_TX = BIT(0),
@@ -83,7 +127,10 @@ static inline void mlx5_accel_tls_del_flow(struct mlx5_core_dev *mdev, u32 swid,
 					   bool direction_sx) { }
 static inline int mlx5_accel_tls_resync_rx(struct mlx5_core_dev *mdev, u32 handle,
 					   u32 seq, u64 rcd_sn) { return 0; }
-static inline bool mlx5_accel_is_tls_device(struct mlx5_core_dev *mdev) { return false; }
+static inline bool mlx5_accel_is_tls_device(struct mlx5_core_dev *mdev)
+{
+	return mlx5_accel_is_ktls_device(mdev);
+}
 static inline u32 mlx5_accel_tls_device_caps(struct mlx5_core_dev *mdev) { return 0; }
 static inline int mlx5_accel_tls_init(struct mlx5_core_dev *mdev) { return 0; }
 static inline void mlx5_accel_tls_cleanup(struct mlx5_core_dev *mdev) { }