From 1fca14d7dd4fed32e67cb2622546552c57b00c38 Mon Sep 17 00:00:00 2001 From: Fiona Trahe Date: Sat, 27 Oct 2018 01:13:54 +0100 Subject: [PATCH] compressdev: clarify usage of op structure Add note on usage of op structure and when it can be accessed and freed. Fixes: 63f4bfd5328b ("compressdev: add enqueue/dequeue functions") Cc: stable@dpdk.org Signed-off-by: Fiona Trahe Acked-by: Shally Verma --- lib/librte_compressdev/rte_compressdev.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/lib/librte_compressdev/rte_compressdev.h b/lib/librte_compressdev/rte_compressdev.h index 5b4fca4dcb..7b68170a5f 100644 --- a/lib/librte_compressdev/rte_compressdev.h +++ b/lib/librte_compressdev/rte_compressdev.h @@ -408,6 +408,13 @@ rte_compressdev_dequeue_burst(uint8_t dev_id, uint16_t qp_id, * @note All compression operations are Out-of-place (OOP) operations, * as the size of the output data is different to the size of the input data. * + * @note The rte_comp_op contains both input and output parameters and is the + * vehicle for the application to pass data into and out of the PMD. While an + * op is inflight, i.e. once it has been enqueued, the private_xform or stream + * attached to it and any mbufs or memory referenced by it should not be altered + * or freed by the application. The PMD may use or change some of this data at + * any time until it has been returned in a dequeue operation. + * * @note The flush flag only applies to operations which return SUCCESS. * In OUT_OF_SPACE cases whether STATEFUL or STATELESS, data in dest buffer * is as if flush flag was FLUSH_NONE. -- 2.20.1