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But application would need to have info on the links to be able to do that efficiently. This function exposes the links to that application. Signed-off-by: Anoob Joseph --- lib/librte_eventdev/rte_eventmode_helper.c | 80 ++++++++++++++++++++++++++++++ lib/librte_eventdev/rte_eventmode_helper.h | 25 ++++++++++ 2 files changed, 105 insertions(+) diff --git a/lib/librte_eventdev/rte_eventmode_helper.c b/lib/librte_eventdev/rte_eventmode_helper.c index 82cc6d3..7827ea6 100644 --- a/lib/librte_eventdev/rte_eventmode_helper.c +++ b/lib/librte_eventdev/rte_eventmode_helper.c @@ -877,3 +877,83 @@ rte_eventmode_helper_initialize_devs( return 0; } + +/* Helper functions for eventmode workers */ + +uint8_t +rte_eventmode_helper_get_event_lcore_links(uint32_t lcore_id, + struct rte_eventmode_helper_conf *mode_conf, + struct rte_eventmode_helper_event_link_info **links) +{ + int i; + int index = 0; + uint8_t lcore_nb_link = 0; + struct rte_eventmode_helper_event_link_info *link; + struct rte_eventmode_helper_event_link_info *link_cache; + struct eventmode_conf *em_conf = NULL; + size_t cache_size; + size_t single_link_size; + + if (mode_conf == NULL || links == NULL) { + RTE_EM_HLPR_LOG_ERR("Invalid args"); + return 0; + } + + /* Get eventmode conf */ + em_conf = (struct eventmode_conf *)(mode_conf->mode_params); + + if (em_conf == NULL) { + RTE_EM_HLPR_LOG_ERR("Invalid event mode conf"); + return 0; + } + + /* Get the number of links registered */ + for (i = 0; i < em_conf->nb_link; i++) { + + /* Get link */ + link = &(em_conf->link[i]); + + /* Check if we have link intended for this lcore */ + if (link->lcore_id == lcore_id) { + + /* Update the number of links for this core */ + lcore_nb_link++; + + } + } + + /* Compute size of one entry to be copied */ + single_link_size = sizeof(struct rte_eventmode_helper_event_link_info); + + /* Compute size of the buffer required */ + cache_size = lcore_nb_link * + sizeof(struct rte_eventmode_helper_event_link_info); + + /* Allocate memory for caching the links */ + link_cache = rte_zmalloc("eventmode-event-lcore-links", cache_size, + RTE_CACHE_LINE_SIZE); + + /* Get the number of links registered */ + for (i = 0; i < em_conf->nb_link; i++) { + + /* Get link */ + link = &(em_conf->link[i]); + + /* Check if we have link intended for this lcore */ + if (link->lcore_id == lcore_id) { + + /* Cache the link */ + memcpy(&link_cache[index], link, single_link_size); + + /* Update index */ + index++; + } + } + + /* Update the links for application to use the cached links */ + *links = link_cache; + + /* Return the number of cached links */ + return lcore_nb_link; +} + diff --git a/lib/librte_eventdev/rte_eventmode_helper.h b/lib/librte_eventdev/rte_eventmode_helper.h index c1676e3..1d8af44 100644 --- a/lib/librte_eventdev/rte_eventmode_helper.h +++ b/lib/librte_eventdev/rte_eventmode_helper.h @@ -107,4 +107,29 @@ rte_eventmode_helper_initialize_devs( void rte_eventmode_helper_display_conf(struct rte_eventmode_helper_conf *mode_conf); +/** + * Get event dev - lcore links + * + * When the application is doing single stage execution, the execution loop + * will be in the application. So the application would need the info on which + * event port need to be polled by an lcore etc. This helper function would + * help the application in doing so. The 'links' would point to the memory + * allocated for the links list, and the application should release this, once + * the use is over. + * + * @param lcore_id + * ID of the lcore for which the links list need to be populated + * @param mode_conf + * Configuration of the mode in which app is doing packet handling + * @param links + * Used to pass the pointer of the memory allocated by the helper to the + * application + * @return + * Number of links found for the lcore + */ +uint8_t +rte_eventmode_helper_get_event_lcore_links(uint32_t lcore_id, + struct rte_eventmode_helper_conf *mode_conf, + struct rte_eventmode_helper_event_link_info **links); + #endif /* _RTE_EVENTMODE_HELPER_H_ */