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regexdev: add maximum number of mbuf segments

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Allows application to query maximum number of mbuf segments that can
be chained together.

Signed-off-by: Gerry Gribbon <ggribbon@nvidia.com>
Acked-by: Ori Kam <orika@nvidia.com>
This commit is contained in:
Gerry Gribbon 2022-10-07 08:04:22 +00:00 committed by Thomas Monjalon
parent b1ae367ab8
commit 70f1ea713f
4 changed files with 48 additions and 0 deletions
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2
drivers/regex/mlx5/mlx5_regex.h
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@ -94,4 +94,6 @@ uint16_t mlx5_regexdev_dequeue(struct rte_regexdev *dev, uint16_t qp_id,
struct rte_regex_ops **ops, uint16_t nb_ops);
uint16_t mlx5_regexdev_enqueue_gga(struct rte_regexdev *dev, uint16_t qp_id,
struct rte_regex_ops **ops, uint16_t nb_ops);
uint16_t mlx5_regexdev_max_segs_get(void);
#endif /* MLX5_REGEX_H */

43
drivers/regex/mlx5/mlx5_regex_fastpath.c
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@ -41,6 +41,39 @@
/* In WQE set mode, the pi should be quarter of the MLX5_REGEX_MAX_WQE_INDEX. */
#define MLX5_REGEX_UMR_QP_PI_IDX(pi, ops) \
(((pi) + (ops)) & (MLX5_REGEX_MAX_WQE_INDEX >> 2))
#ifdef RTE_LIBRTE_MLX5_DEBUG
#define MLX5_REGEX_DEBUG 0
#endif
#ifdef HAVE_MLX5_UMR_IMKEY
static uint16_t max_nb_segs = MLX5_REGEX_MAX_KLM_NUM;
#else
static uint16_t max_nb_segs = 1;
#endif
uint16_t
mlx5_regexdev_max_segs_get(void)
{
return max_nb_segs;
}
#ifdef MLX5_REGEX_DEBUG
static inline uint16_t
validate_ops(struct rte_regex_ops **ops, uint16_t nb_ops)
{
uint16_t nb_left = nb_ops;
struct rte_mbuf *mbuf;
while (nb_left--) {
mbuf = ops[nb_left]->mbuf;
if ((mbuf->pkt_len > MLX5_RXP_MAX_JOB_LENGTH) ||
(mbuf->nb_segs > max_nb_segs)) {
DRV_LOG(ERR, "Failed to validate regex ops");
return 1;
}
}
return 0;
}
#endif
static inline uint32_t
qp_size_get(struct mlx5_regex_hw_qp *qp)
@ -375,6 +408,11 @@ mlx5_regexdev_enqueue_gga(struct rte_regexdev *dev, uint16_t qp_id,
struct mlx5_regex_hw_qp *qp_obj;
size_t hw_qpid, nb_left = nb_ops, nb_desc;
#ifdef MLX5_REGEX_DEBUG
if (validate_ops(ops, nb_ops))
return 0;
#endif
while ((hw_qpid = ffs(queue->free_qps))) {
hw_qpid--; /* ffs returns 1 for bit 0 */
qp_obj = &queue->qps[hw_qpid];
@ -409,6 +447,11 @@ mlx5_regexdev_enqueue(struct rte_regexdev *dev, uint16_t qp_id,
struct mlx5_regex_hw_qp *qp_obj;
size_t hw_qpid, job_id, i = 0;
#ifdef MLX5_REGEX_DEBUG
if (validate_ops(ops, nb_ops))
return 0;
#endif
while ((hw_qpid = ffs(queue->free_qps))) {
hw_qpid--; /* ffs returns 1 for bit 0 */
qp_obj = &queue->qps[hw_qpid];

1
drivers/regex/mlx5/mlx5_rxp.c
View File

@ -45,6 +45,7 @@ mlx5_regex_info_get(struct rte_regexdev *dev __rte_unused,
RTE_REGEXDEV_CAPA_QUEUE_PAIR_OOS_F;
info->rule_flags = 0;
info->max_queue_pairs = UINT16_MAX;
info->max_segs = mlx5_regexdev_max_segs_get();
return 0;
}

2
lib/regexdev/rte_regexdev.h
View File

@ -612,6 +612,8 @@ struct rte_regexdev_info {
/**< Maximum payload size for a pattern match request or scan.
* @see RTE_REGEXDEV_CFG_CROSS_BUFFER_SCAN_F
*/
uint16_t max_segs;
/**< Maximum number of mbuf segments that can be chained together. */
uint32_t max_rules_per_group;
/**< Maximum rules supported per group by this device. */
uint16_t max_groups;