PDCP process is split into 2 parts. One before crypto processing
(rte_pdcp_pkt_pre_process()) and one after crypto processing
(rte_pdcp_pkt_post_process()). Functionality of pre-process &
post-process varies based on the type of entity. Registration of entity
specific function pointer allows skipping multiple checks that would
come in datapath otherwise.
Signed-off-by: Anoob Joseph <anoobj@marvell.com>
Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
Signed-off-by: Volodymyr Fialko <vfialko@marvell.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>
---
lib/pdcp/rte_pdcp.h | 96 ++++++++++++++++++++++++++++++++++++++++++++
lib/pdcp/version.map | 3 ++
2 files changed, 99 insertions(+)
@@ -22,6 +22,21 @@
extern "C" {
#endif
+/* Forward declarations. */
+struct rte_pdcp_entity;
+
+/* PDCP pre-process function based on entity configuration. */
+typedef uint16_t (*rte_pdcp_pre_p_t)(const struct rte_pdcp_entity *entity,
+ struct rte_mbuf *mb[],
+ struct rte_crypto_op *cop[],
+ uint16_t num, uint16_t *nb_err);
+
+/* PDCP post-process function based on entity configuration. */
+typedef uint16_t (*rte_pdcp_post_p_t)(const struct rte_pdcp_entity *entity,
+ struct rte_mbuf *in_mb[],
+ struct rte_mbuf *out_mb[],
+ uint16_t num, uint16_t *nb_err);
+
/**
* PDCP entity.
*
@@ -34,6 +49,10 @@ extern "C" {
* depending on which radio bearer it is carrying data for.
*/
struct rte_pdcp_entity {
+ /** Entity specific pre-process handle. */
+ rte_pdcp_pre_p_t pre_process;
+ /** Entity specific post-process handle. */
+ rte_pdcp_post_p_t post_process;
/**
* PDCP entities may hold packets for purposes of in-order delivery
* (in case of receiving PDCP entity) and re-transmission
@@ -159,6 +178,83 @@ int
rte_pdcp_entity_suspend(struct rte_pdcp_entity *pdcp_entity,
struct rte_mbuf *out_mb[]);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * For input mbufs and given PDCP entity pre-process the mbufs and prepare
+ * crypto ops that can be enqueued to the cryptodev associated with given
+ * session. Only error packets would be moved returned in the input buffer,
+ * *mb*, and it is the responsibility of the application to free the same.
+ *
+ * @param entity
+ * Pointer to the *rte_pdcp_entity* object the packets belong to.
+ * @param[in, out] mb
+ * The address of an array of *num* pointers to *rte_mbuf* structures
+ * which contain the input packets.
+ * Any error packets would be returned in the same buffer.
+ * @param[out] cop
+ * The address of an array that can hold up to *num* pointers to
+ * *rte_crypto_op* structures. Crypto ops would be allocated by
+ * ``rte_pdcp_pkt_pre_process`` API.
+ * @param num
+ * The maximum number of packets to process.
+ * @param[out] nb_err
+ * Pointer to return the number of error packets returned in *mb*.
+ * @return
+ * Count of crypto_ops prepared.
+ */
+__rte_experimental
+static inline uint16_t
+rte_pdcp_pkt_pre_process(const struct rte_pdcp_entity *entity,
+ struct rte_mbuf *mb[], struct rte_crypto_op *cop[],
+ uint16_t num, uint16_t *nb_err)
+{
+ return entity->pre_process(entity, mb, cop, num, nb_err);
+}
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * For input mbufs and given PDCP entity, perform PDCP post-processing of the mbufs.
+ *
+ * Input mbufs are the ones retrieved from rte_crypto_ops dequeued from cryptodev
+ * and grouped by *rte_pdcp_pkt_crypto_group()*.
+ *
+ * The post-processed packets would be returned in the *out_mb* buffer.
+ * The resultant mbufs would be grouped into success packets and error packets.
+ * Error packets would be grouped in the end of the array and
+ * it is the responsibility of the application to handle the same.
+ *
+ * When in-order delivery is enabled, PDCP entity may buffer packets and would
+ * deliver packets only when all prior packets have been post-processed.
+ * That would result in returning more/less packets than enqueued.
+ *
+ * @param entity
+ * Pointer to the *rte_pdcp_entity* object the packets belong to.
+ * @param in_mb
+ * The address of an array of *num* pointers to *rte_mbuf* structures.
+ * @param[out] out_mb
+ * The address of an array of *num* pointers to *rte_mbuf* structures
+ * to output packets after PDCP post-processing.
+ * @param num
+ * The maximum number of packets to process.
+ * @param[out] nb_err
+ * The number of error packets returned in *out_mb* buffer.
+ * @return
+ * Count of packets returned in *out_mb* buffer.
+ */
+__rte_experimental
+static inline uint16_t
+rte_pdcp_pkt_post_process(const struct rte_pdcp_entity *entity,
+ struct rte_mbuf *in_mb[],
+ struct rte_mbuf *out_mb[],
+ uint16_t num, uint16_t *nb_err)
+{
+ return entity->post_process(entity, in_mb, out_mb, num, nb_err);
+}
+
#ifdef __cplusplus
}
#endif
@@ -6,5 +6,8 @@ EXPERIMENTAL {
rte_pdcp_entity_release;
rte_pdcp_entity_suspend;
+ rte_pdcp_pkt_post_process;
+ rte_pdcp_pkt_pre_process;
+
local: *;
};