From: Abhinandan Gujjar Date: Mon, 16 Apr 2018 06:54:55 +0000 (+0530) Subject: cryptodev: support session private data setting X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2d96371fbd80d9163a75b7fba6750f89a708e0fb;p=dpdk.git cryptodev: support session private data setting The application may want to store private data along with the rte_cryptodev that is transparent to the rte_cryptodev layer. For e.g., If an eventdev based application is submitting a rte_cryptodev_sym_session operation and wants to indicate event information required to construct a new event that will be enqueued to eventdev after completion of the rte_cryptodev_sym_session operation. This patch provides a mechanism for the application to associate this information with the rte_cryptodev_sym_session session. The application can set the private data using rte_cryptodev_sym_session_set_private_data() and retrieve it using rte_cryptodev_sym_session_get_private_data(). Signed-off-by: Abhinandan Gujjar Signed-off-by: Nikhil Rao Acked-by: Akhil Goyal Acked-by: Pablo de Lara --- diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c index 8745b6b029..2a95a351f0 100644 --- a/lib/librte_cryptodev/rte_cryptodev.c +++ b/lib/librte_cryptodev/rte_cryptodev.c @@ -1099,8 +1099,10 @@ rte_cryptodev_sym_session_create(struct rte_mempool *mp) return NULL; } - /* Clear device session pointer */ - memset(sess, 0, (sizeof(void *) * nb_drivers)); + /* Clear device session pointer. + * Include the flag indicating presence of private data + */ + memset(sess, 0, (sizeof(void *) * nb_drivers) + sizeof(uint8_t)); return sess; } @@ -1204,9 +1206,10 @@ rte_cryptodev_get_header_session_size(void) { /* * Header contains pointers to the private data - * of all registered drivers + * of all registered drivers, and a flag which + * indicates presence of private data */ - return (sizeof(void *) * nb_drivers); + return ((sizeof(void *) * nb_drivers) + sizeof(uint8_t)); } unsigned int @@ -1238,6 +1241,38 @@ rte_cryptodev_get_private_session_size(uint8_t dev_id) } +int __rte_experimental +rte_cryptodev_sym_session_set_private_data( + struct rte_cryptodev_sym_session *sess, + void *data, + uint16_t size) +{ + uint16_t off_set = sizeof(void *) * nb_drivers; + uint8_t *private_data_present = (uint8_t *)sess + off_set; + + if (sess == NULL) + return -EINVAL; + + *private_data_present = 1; + off_set += sizeof(uint8_t); + rte_memcpy((uint8_t *)sess + off_set, data, size); + return 0; +} + +void * __rte_experimental +rte_cryptodev_sym_session_get_private_data( + struct rte_cryptodev_sym_session *sess) +{ + uint16_t off_set = sizeof(void *) * nb_drivers; + uint8_t *private_data_present = (uint8_t *)sess + off_set; + + if (sess == NULL || !*private_data_present) + return NULL; + + off_set += sizeof(uint8_t); + return (uint8_t *)sess + off_set; +} + /** Initialise rte_crypto_op mempool element */ static void rte_crypto_op_init(struct rte_mempool *mempool, diff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h index c8fa68935c..261a359dc0 100644 --- a/lib/librte_cryptodev/rte_cryptodev.h +++ b/lib/librte_cryptodev/rte_cryptodev.h @@ -1037,6 +1037,38 @@ int rte_cryptodev_driver_id_get(const char *name); */ const char *rte_cryptodev_driver_name_get(uint8_t driver_id); +/** + * Set private data for a session. + * + * @param sess Session pointer allocated by + * *rte_cryptodev_sym_session_create*. + * @param data Pointer to the private data. + * @param size Size of the private data. + * + * @return + * - On success, zero. + * - On failure, a negative value. + */ +int __rte_experimental +rte_cryptodev_sym_session_set_private_data( + struct rte_cryptodev_sym_session *sess, + void *data, + uint16_t size); + +/** + * Get private data of a session. + * + * @param sess Session pointer allocated by + * *rte_cryptodev_sym_session_create*. + * + * @return + * - On success return pointer to private data. + * - On failure returns NULL. + */ +void * __rte_experimental +rte_cryptodev_sym_session_get_private_data( + struct rte_cryptodev_sym_session *sess); + #ifdef __cplusplus } #endif diff --git a/lib/librte_cryptodev/rte_cryptodev_version.map b/lib/librte_cryptodev/rte_cryptodev_version.map index eb47308b6d..560e464117 100644 --- a/lib/librte_cryptodev/rte_cryptodev_version.map +++ b/lib/librte_cryptodev/rte_cryptodev_version.map @@ -85,3 +85,10 @@ DPDK_17.11 { rte_cryptodev_pmd_parse_input_args; } DPDK_17.08; + +EXPERIMENTAL { + global: + + rte_cryptodev_sym_session_get_private_data; + rte_cryptodev_sym_session_set_private_data; +} DPDK_17.11;