From: Nipun Gupta Date: Tue, 23 Jan 2018 14:17:51 +0000 (+0530) Subject: bus/fslmc: add function to prefetch next DQRR entry X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=8a7833e19b7bdd78b45cb322c809ed7e10d7b18d;p=dpdk.git bus/fslmc: add function to prefetch next DQRR entry Signed-off-by: Nipun Gupta Acked-by: Hemant Agrawal --- diff --git a/drivers/bus/fslmc/qbman/include/fsl_qbman_portal.h b/drivers/bus/fslmc/qbman/include/fsl_qbman_portal.h index 95d785f157..3e63db3abe 100644 --- a/drivers/bus/fslmc/qbman/include/fsl_qbman_portal.h +++ b/drivers/bus/fslmc/qbman/include/fsl_qbman_portal.h @@ -380,6 +380,12 @@ int qbman_swp_pull(struct qbman_swp *s, struct qbman_pull_desc *d); */ const struct qbman_result *qbman_swp_dqrr_next(struct qbman_swp *p); +/** + * qbman_swp_prefetch_dqrr_next() - prefetch the next DQRR entry. + * @s: the software portal object. + */ +void qbman_swp_prefetch_dqrr_next(struct qbman_swp *s); + /** * qbman_swp_dqrr_consume() - Consume DQRR entries previously returned from * qbman_swp_dqrr_next(). diff --git a/drivers/bus/fslmc/qbman/qbman_portal.c b/drivers/bus/fslmc/qbman/qbman_portal.c index 2d324f74ab..e22173351a 100644 --- a/drivers/bus/fslmc/qbman/qbman_portal.c +++ b/drivers/bus/fslmc/qbman/qbman_portal.c @@ -779,6 +779,17 @@ int qbman_swp_pull(struct qbman_swp *s, struct qbman_pull_desc *d) #define QBMAN_RESULT_BPSCN 0x29 #define QBMAN_RESULT_CSCN_WQ 0x2a +#include + +void qbman_swp_prefetch_dqrr_next(struct qbman_swp *s) +{ + const struct qbman_result *p; + + p = qbman_cena_read_wo_shadow(&s->sys, + QBMAN_CENA_SWP_DQRR(s->dqrr.next_idx)); + rte_prefetch0(p); +} + /* NULL return if there are no unconsumed DQRR entries. Returns a DQRR entry * only once, so repeated calls can return a sequence of DQRR entries, without * requiring they be consumed immediately or in any particular order. diff --git a/drivers/bus/fslmc/rte_bus_fslmc_version.map b/drivers/bus/fslmc/rte_bus_fslmc_version.map index 09ec05f6e8..3f1ba130cc 100644 --- a/drivers/bus/fslmc/rte_bus_fslmc_version.map +++ b/drivers/bus/fslmc/rte_bus_fslmc_version.map @@ -99,6 +99,7 @@ DPDK_18.02 { qbman_fq_query_state; qbman_fq_state_frame_count; qbman_swp_dqrr_idx_consume; + qbman_swp_prefetch_dqrr_next; rte_fslmc_get_device_count; } DPDK_17.11;