From 1004be3c03cd1cfecc3c2a46bd15f0137d112565 Mon Sep 17 00:00:00 2001 From: Shiri Kuzin Date: Tue, 20 Jul 2021 16:09:34 +0300 Subject: [PATCH] crypto/mlx5: support session operations Sessions are used in symmetric transformations in order to prepare objects and data for packet processing stage. A mlx5 session includes iv_offset, pointer to mlx5_crypto_dek struct, bsf_size, bsf_p_type, block size index, encryption_order and encryption standard. Implement the next session operations: mlx5_crypto_sym_session_get_size- returns the size of the mlx5 session struct. mlx5_crypto_sym_session_configure- prepares the DEK hash-list and saves all the session data. mlx5_crypto_sym_session_clear - destroys the DEK hash-list. Signed-off-by: Shiri Kuzin Acked-by: Matan Azrad Acked-by: Akhil Goyal --- doc/guides/cryptodevs/features/mlx5.ini | 5 + doc/guides/cryptodevs/mlx5.rst | 10 ++ drivers/crypto/mlx5/mlx5_crypto.c | 122 +++++++++++++++++++++++- 3 files changed, 133 insertions(+), 4 deletions(-) diff --git a/doc/guides/cryptodevs/features/mlx5.ini b/doc/guides/cryptodevs/features/mlx5.ini index ceadd967b6..bd757b5211 100644 --- a/doc/guides/cryptodevs/features/mlx5.ini +++ b/doc/guides/cryptodevs/features/mlx5.ini @@ -4,12 +4,17 @@ ; Refer to default.ini for the full list of available PMD features. ; [Features] +Symmetric crypto = Y HW Accelerated = Y +Cipher multiple data units = Y +Cipher wrapped key = Y ; ; Supported crypto algorithms of a mlx5 crypto driver. ; [Cipher] +AES XTS (128) = Y +AES XTS (256) = Y ; ; Supported authentication algorithms of a mlx5 crypto driver. diff --git a/doc/guides/cryptodevs/mlx5.rst b/doc/guides/cryptodevs/mlx5.rst index ac89a4029e..ed60a93f14 100644 --- a/doc/guides/cryptodevs/mlx5.rst +++ b/doc/guides/cryptodevs/mlx5.rst @@ -55,6 +55,16 @@ Supported NICs * Mellanox\ |reg| ConnectX\ |reg|-6 200G MCX654106A-HCAT (2x200G) + +Limitations +----------- + +- AES-XTS keys provided in xform must include keytag and should be wrapped. +- The supported data-unit lengths are 512B and 1KB. In case the `dataunit_len` + is not provided in the cipher xform, the OP length is limited to the above + values and 1MB. + + Prerequisites ------------- diff --git a/drivers/crypto/mlx5/mlx5_crypto.c b/drivers/crypto/mlx5/mlx5_crypto.c index ad1d7b65aa..2fe2e8b871 100644 --- a/drivers/crypto/mlx5/mlx5_crypto.c +++ b/drivers/crypto/mlx5/mlx5_crypto.c @@ -3,6 +3,7 @@ */ #include +#include #include #include #include @@ -22,7 +23,9 @@ #define MLX5_CRYPTO_MAX_QPS 1024 #define MLX5_CRYPTO_FEATURE_FLAGS \ - RTE_CRYPTODEV_FF_HW_ACCELERATED + (RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO | RTE_CRYPTODEV_FF_HW_ACCELERATED | \ + RTE_CRYPTODEV_FF_CIPHER_WRAPPED_KEY | \ + RTE_CRYPTODEV_FF_CIPHER_MULTIPLE_DATA_UNITS) TAILQ_HEAD(mlx5_crypto_privs, mlx5_crypto_priv) mlx5_crypto_priv_list = TAILQ_HEAD_INITIALIZER(mlx5_crypto_priv_list); @@ -67,6 +70,21 @@ static const struct rte_driver mlx5_drv = { static struct cryptodev_driver mlx5_cryptodev_driver; +struct mlx5_crypto_session { + uint32_t bs_bpt_eo_es; + /**< 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. */ + uint32_t dek_id; /**< DEK ID */ +} __rte_packed; + static void mlx5_crypto_dev_infos_get(struct rte_cryptodev *dev, struct rte_cryptodev_info *dev_info) @@ -134,6 +152,102 @@ mlx5_crypto_dev_close(struct rte_cryptodev *dev) return 0; } +static unsigned int +mlx5_crypto_sym_session_get_size(struct rte_cryptodev *dev __rte_unused) +{ + return sizeof(struct mlx5_crypto_session); +} + +static int +mlx5_crypto_sym_session_configure(struct rte_cryptodev *dev, + struct rte_crypto_sym_xform *xform, + struct rte_cryptodev_sym_session *session, + struct rte_mempool *mp) +{ + struct mlx5_crypto_priv *priv = dev->data->dev_private; + struct mlx5_crypto_session *sess_private_data; + struct rte_crypto_cipher_xform *cipher; + uint8_t encryption_order; + int ret; + + if (unlikely(xform->next != NULL)) { + DRV_LOG(ERR, "Xform next is not supported."); + return -ENOTSUP; + } + if (unlikely((xform->type != RTE_CRYPTO_SYM_XFORM_CIPHER) || + (xform->cipher.algo != RTE_CRYPTO_CIPHER_AES_XTS))) { + DRV_LOG(ERR, "Only AES-XTS algorithm is supported."); + return -ENOTSUP; + } + ret = rte_mempool_get(mp, (void *)&sess_private_data); + if (ret != 0) { + DRV_LOG(ERR, + "Failed to get session %p private data from mempool.", + sess_private_data); + return -ENOMEM; + } + cipher = &xform->cipher; + sess_private_data->dek = mlx5_crypto_dek_prepare(priv, cipher); + if (sess_private_data->dek == NULL) { + rte_mempool_put(mp, sess_private_data); + DRV_LOG(ERR, "Failed to prepare dek."); + return -ENOMEM; + } + if (cipher->op == RTE_CRYPTO_CIPHER_OP_ENCRYPT) + encryption_order = MLX5_ENCRYPTION_ORDER_ENCRYPTED_RAW_MEMORY; + else + encryption_order = MLX5_ENCRYPTION_ORDER_ENCRYPTED_RAW_WIRE; + sess_private_data->bs_bpt_eo_es = rte_cpu_to_be_32 + (MLX5_BSF_SIZE_64B << MLX5_BSF_SIZE_OFFSET | + 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 0: + sess_private_data->bsp_res = 0; + break; + case 512: + sess_private_data->bsp_res = rte_cpu_to_be_32 + ((uint32_t)MLX5_BLOCK_SIZE_512B << + MLX5_BLOCK_SIZE_OFFSET); + break; + case 4096: + sess_private_data->bsp_res = rte_cpu_to_be_32 + ((uint32_t)MLX5_BLOCK_SIZE_4096B << + 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; + sess_private_data->dek_id = + rte_cpu_to_be_32(sess_private_data->dek->obj->id & + 0xffffff); + set_sym_session_private_data(session, dev->driver_id, + sess_private_data); + DRV_LOG(DEBUG, "Session %p was configured.", sess_private_data); + return 0; +} + +static void +mlx5_crypto_sym_session_clear(struct rte_cryptodev *dev, + struct rte_cryptodev_sym_session *sess) +{ + struct mlx5_crypto_priv *priv = dev->data->dev_private; + struct mlx5_crypto_session *spriv = get_sym_session_private_data(sess, + dev->driver_id); + + if (unlikely(spriv == NULL)) { + DRV_LOG(ERR, "Failed to get session %p private data.", spriv); + return; + } + mlx5_crypto_dek_destroy(priv, spriv->dek); + set_sym_session_private_data(sess, dev->driver_id, NULL); + rte_mempool_put(rte_mempool_from_obj(spriv), spriv); + DRV_LOG(DEBUG, "Session %p was cleared.", spriv); +} + static int mlx5_crypto_queue_pair_release(struct rte_cryptodev *dev, uint16_t qp_id) { @@ -265,9 +379,9 @@ static struct rte_cryptodev_ops mlx5_crypto_ops = { .stats_reset = NULL, .queue_pair_setup = mlx5_crypto_queue_pair_setup, .queue_pair_release = mlx5_crypto_queue_pair_release, - .sym_session_get_size = NULL, - .sym_session_configure = NULL, - .sym_session_clear = NULL, + .sym_session_get_size = mlx5_crypto_sym_session_get_size, + .sym_session_configure = mlx5_crypto_sym_session_configure, + .sym_session_clear = mlx5_crypto_sym_session_clear, .sym_get_raw_dp_ctx_size = NULL, .sym_configure_raw_dp_ctx = NULL, }; -- 2.20.1