In AES-XTS the data to be encrypted\decrypted does not have to be in multiples of 16B size, the unit of data is called data-unit.
As a result of patch [1] a new field is added to the cipher capability, called dataunit_set, where the devices can report the range of supported data-unit sizes. The new field enables saving the data-unit size in the session structure to the block size pointer variable in order to support several data-unit sizes. [1] https://www.mail-archive.com/dev@dpdk.org/msg203590.html Signed-off-by: Shiri Kuzin <shi...@nvidia.com> --- drivers/crypto/mlx5/mlx5_crypto.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/crypto/mlx5/mlx5_crypto.c b/drivers/crypto/mlx5/mlx5_crypto.c index 25a435a999..8810872aff 100644 --- a/drivers/crypto/mlx5/mlx5_crypto.c +++ b/drivers/crypto/mlx5/mlx5_crypto.c @@ -48,6 +48,11 @@ struct mlx5_crypto_session { * bsf_size, bsf_p_type, encryption_order and encryption standard, * saved in big endian format. */ + uint32_t bsp_res; + /* + * crypto_block_size_pointer and reserved 24 bits saved in big endian + * format. + */ uint32_t iv_offset:16; /* Starting point for Initialisation Vector. */ struct mlx5_crypto_dek *dek; /* Pointer to dek struct. */ @@ -170,6 +175,26 @@ mlx5_crypto_sym_session_configure(struct rte_cryptodev *dev, MLX5_BSF_P_TYPE_CRYPTO << MLX5_BSF_P_TYPE_OFFSET | encryption_order << MLX5_ENCRYPTION_ORDER_OFFSET | MLX5_ENCRYPTION_STANDARD_AES_XTS); + switch (xform->cipher.dataunit_len) { + case RTE_CRYPTO_CIPHER_DATA_UNIT_LEN_512_BYTES: + sess_private_data->bsp_res = rte_cpu_to_be_32 + ((uint32_t)MLX5_BLOCK_SIZE_512B << + MLX5_BLOCK_SIZE_OFFSET); + break; + case RTE_CRYPTO_CIPHER_DATA_UNIT_LEN_4096_BYTES: + sess_private_data->bsp_res = rte_cpu_to_be_32 + ((uint32_t)MLX5_BLOCK_SIZE_4096B << + MLX5_BLOCK_SIZE_OFFSET); + break; + case RTE_CRYPTO_CIPHER_DATA_UNIT_LEN_1M_BYTES: + sess_private_data->bsp_res = rte_cpu_to_be_32 + ((uint32_t)MLX5_BLOCK_SIZE_1MB << + MLX5_BLOCK_SIZE_OFFSET); + break; + default: + DRV_LOG(ERR, "Cipher data unit length is not supported."); + return -ENOTSUP; + } sess_private_data->iv_offset = cipher->iv.offset; set_sym_session_private_data(session, dev->driver_id, sess_private_data); -- 2.21.0
