Hi Ori,
Minor comments below.
<snip>
>+/**
>+ * The generic *rte_regex_ops* structure to hold the RegEx attributes
>+ * for enqueue and dequeue operation.
>+ */
>+struct rte_regex_ops {
>+ /* W0 */
>+ uint16_t req_flags;
>+ /**< Request flags for the RegEx ops.
>+ * @see RTE_REGEX_OPS_REQ_*
>+ */
>+ uint16_t rsp_flags;
>+ /**< Response flags for the RegEx ops.
>+ * @see RTE_REGEX_OPS_RSP_*
>+ */
>+ uint16_t nb_actual_matches;
>+ /**< The total number of actual matches detected by the
>Regex device.*/
>+ uint16_t nb_matches;
>+ /**< The total number of matches returned by the RegEx
>device for this
>+ * scan. The size of *rte_regex_ops::matches* zero length array
>will be
>+ * this value.
>+ *
>+ * @see struct rte_regex_ops::matches, struct
>rte_regex_match
>+ */
>+
>+ /* W1 */
>+ struct rte_mbuf mbuf; /**< source mbuf, to search in. */
This should be *mbuf.
>+
>+ /* W2 */
>+ uint16_t group_id0;
This should be group_id1.
>+ /**< First group_id to match the rule against. Minimum one
>group id
>+ * must be provided by application.
>+ * When RTE_REGEX_OPS_REQ_GROUP_ID1_VALID_F set then
>group_id1
>+ * is valid, respectively similar flags for group_id2 and group_id3.
>+ * Upon the match, struct rte_regex_match::group_id shall be
>updated
>+ * with matching group ID by the device. Group ID scheme
>provides
>+ * rule isolation and effective pattern matching.
>+ */
>+ uint16_t group_id1;
>+ /**< Second group_id to match the rule against.
>+ *
>+ * @see RTE_REGEX_OPS_REQ_GROUP_ID1_VALID_F
>+ */
The above `group_id1` should be removed as its duplicate.
>+ uint16_t group_id2;
>+ /**< Third group_id to match the rule against.
>+ *
>+ * @see RTE_REGEX_OPS_REQ_GROUP_ID2_VALID_F
>+ */
>+ uint16_t group_id3;
>+ /**< Forth group_id to match the rule against.
>+ *
>+ * @see RTE_REGEX_OPS_REQ_GROUP_ID3_VALID_F
>+ */
>+
>+ /* W3 */
>+ RTE_STD_C11
>+ union {
>+ uint64_t user_id;
>+ /**< Application specific opaque value. An application
>may use
>+ * this field to hold application specific value to share
>+ * between dequeue and enqueue operation.
>+ * Implementation should not modify this field.
>+ */
>+ void *user_ptr;
>+ /**< Pointer representation of *user_id* */
>+ };
>+
>+ /* W4 */
>+ struct rte_regex_match matches[];
>+ /**< Zero length array to hold the match tuples.
>+ * The struct rte_regex_ops::nb_matches value holds the
>number of
>+ * elements in this array.
>+ *
>+ * @see struct rte_regex_ops::nb_matches
>+ */
>+};
