@@ -19,6 +19,7 @@ sources = files(
'rte_event_crypto_adapter.c',
'rte_event_eth_rx_adapter.c',
'rte_event_eth_tx_adapter.c',
+ 'rte_event_dispatcher.c',
'rte_event_ring.c',
'rte_event_timer_adapter.c',
'rte_eventdev.c',
@@ -27,6 +28,7 @@ headers = files(
'rte_event_crypto_adapter.h',
'rte_event_eth_rx_adapter.h',
'rte_event_eth_tx_adapter.h',
+ 'rte_event_dispatcher.h',
'rte_event_ring.h',
'rte_event_timer_adapter.h',
'rte_eventdev.h',
new file mode 100644
@@ -0,0 +1,670 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2023 Ericsson AB
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <rte_branch_prediction.h>
+#include <rte_lcore.h>
+#include <rte_service_component.h>
+
+#include "eventdev_pmd.h"
+
+#include <rte_event_dispatcher.h>
+
+#define RED_MAX_PORTS_PER_LCORE (4)
+#define RED_MAX_HANDLERS (32)
+#define RED_MAX_FINALIZERS (16)
+
+struct rte_event_dispatcher_lcore_port {
+ uint8_t port_id;
+ uint16_t batch_size;
+ uint64_t timeout;
+};
+
+struct rte_event_dispatcher_lcore {
+ uint8_t num_ports;
+ struct rte_event_dispatcher_lcore_port ports[RED_MAX_PORTS_PER_LCORE];
+ struct rte_event_dispatcher_stats stats;
+} __rte_cache_aligned;
+
+struct rte_event_dispatcher_handler {
+ int id;
+ rte_event_dispatcher_match_t match_fun;
+ void *match_data;
+ rte_event_dispatcher_process_t process_fun;
+ void *process_data;
+};
+
+struct rte_event_dispatcher_finalizer {
+ int id;
+ rte_event_dispatcher_finalize_t finalize_fun;
+ void *finalize_data;
+};
+
+struct rte_event_dispatcher {
+ uint8_t id;
+ uint8_t event_dev_id;
+ int socket_id;
+ uint32_t service_id;
+ struct rte_event_dispatcher_lcore lcores[RTE_MAX_LCORE];
+ uint16_t num_handlers;
+ uint16_t num_finalizers;
+ struct rte_event_dispatcher_handler handlers[RED_MAX_HANDLERS];
+ struct rte_event_dispatcher_finalizer finalizers[RED_MAX_FINALIZERS];
+};
+
+static struct rte_event_dispatcher *dispatchers[UINT8_MAX];
+
+static bool
+red_has_dispatcher(uint8_t id)
+{
+ return dispatchers[id] != NULL;
+}
+
+static struct rte_event_dispatcher *
+red_get_dispatcher(uint8_t id)
+{
+ return dispatchers[id];
+}
+
+static void
+red_set_dispatcher(uint8_t id, struct rte_event_dispatcher *dispatcher)
+{
+ dispatchers[id] = dispatcher;
+}
+
+#define RED_VALID_ID_OR_RET_EINVAL(id) \
+ do { \
+ if (unlikely(!red_has_dispatcher(id))) { \
+ RTE_EDEV_LOG_ERR("Invalid dispatcher id %d\n", id); \
+ return -EINVAL; \
+ } \
+ } while (0)
+
+static int
+red_lookup_handler_idx(struct rte_event_dispatcher *dispatcher,
+ const struct rte_event *event)
+{
+ uint16_t i;
+
+ for (i = 0; i < dispatcher->num_handlers; i++) {
+ struct rte_event_dispatcher_handler *handler =
+ &dispatcher->handlers[i];
+
+ if (handler->match_fun(event, handler->match_data))
+ return i;
+ }
+
+ return -1;
+}
+
+static inline void
+red_dispatch_events(struct rte_event_dispatcher *dispatcher,
+ struct rte_event_dispatcher_lcore *lcore,
+ struct rte_event_dispatcher_lcore_port *port,
+ struct rte_event *events, uint16_t num_events)
+{
+ int i;
+ struct rte_event bursts[RED_MAX_HANDLERS][num_events];
+ uint16_t burst_lens[RED_MAX_HANDLERS] = { 0 };
+ uint16_t drop_count = 0;
+ uint16_t dispatch_count;
+
+ for (i = 0; i < num_events; i++) {
+ struct rte_event *event = &events[i];
+ int handler_idx;
+
+ handler_idx = red_lookup_handler_idx(dispatcher, event);
+
+ if (unlikely(handler_idx < 0)) {
+ drop_count++;
+ continue;
+ }
+
+ bursts[handler_idx][burst_lens[handler_idx]] = *event;
+ burst_lens[handler_idx]++;
+ }
+
+ for (i = 0; i < dispatcher->num_handlers; i++) {
+ struct rte_event_dispatcher_handler *handler =
+ &dispatcher->handlers[i];
+ uint16_t len = burst_lens[i];
+
+ if (len == 0)
+ continue;
+
+ handler->process_fun(dispatcher->event_dev_id, port->port_id,
+ bursts[i], len, handler->process_data);
+ }
+
+ dispatch_count = num_events - drop_count;
+
+ lcore->stats.ev_dispatch_count += dispatch_count;
+ lcore->stats.ev_drop_count += drop_count;
+
+ for (i = 0; i < dispatcher->num_finalizers; i++) {
+ struct rte_event_dispatcher_finalizer *finalizer =
+ &dispatcher->finalizers[i];
+
+ finalizer->finalize_fun(dispatcher->event_dev_id,
+ port->port_id,
+ finalizer->finalize_data);
+ }
+}
+
+static __rte_always_inline void
+red_port_dequeue(struct rte_event_dispatcher *dispatcher,
+ struct rte_event_dispatcher_lcore *lcore,
+ struct rte_event_dispatcher_lcore_port *port)
+{
+ uint16_t batch_size = port->batch_size;
+ struct rte_event events[batch_size];
+ uint16_t n;
+
+ n = rte_event_dequeue_burst(dispatcher->event_dev_id, port->port_id,
+ events, batch_size, port->timeout);
+
+ if (likely(n > 0))
+ red_dispatch_events(dispatcher, lcore, port, events, n);
+
+ lcore->stats.poll_count++;
+}
+
+static __rte_always_inline void
+red_lcore_process(struct rte_event_dispatcher *dispatcher,
+ struct rte_event_dispatcher_lcore *lcore)
+{
+ uint16_t i;
+
+ for (i = 0; i < lcore->num_ports; i++) {
+ struct rte_event_dispatcher_lcore_port *port =
+ &lcore->ports[i];
+
+ red_port_dequeue(dispatcher, lcore, port);
+ }
+}
+
+static int32_t
+red_process(void *userdata)
+{
+ struct rte_event_dispatcher *dispatcher = userdata;
+ unsigned int lcore_id = rte_lcore_id();
+ struct rte_event_dispatcher_lcore *lcore =
+ &dispatcher->lcores[lcore_id];
+
+ int i;
+ for (i = 0; i < 15; i++)
+ red_lcore_process(dispatcher, lcore);
+
+ return 0;
+}
+
+static int
+red_service_register(struct rte_event_dispatcher *dispatcher)
+{
+ struct rte_service_spec service = {
+ .callback = red_process,
+ .callback_userdata = dispatcher,
+ .capabilities = RTE_SERVICE_CAP_MT_SAFE,
+ .socket_id = dispatcher->socket_id
+ };
+ int rc;
+
+ snprintf(service.name, RTE_SERVICE_NAME_MAX - 1, "red_%d",
+ dispatcher->id);
+
+ rc = rte_service_component_register(&service, &dispatcher->service_id);
+
+ if (rc)
+ RTE_EDEV_LOG_ERR("Registration of event dispatcher service "
+ "%s failed with error code %d\n",
+ service.name, rc);
+
+ return rc;
+}
+
+static int
+red_service_unregister(struct rte_event_dispatcher *dispatcher)
+{
+ int rc;
+
+ rc = rte_service_component_unregister(dispatcher->service_id);
+
+ if (rc)
+ RTE_EDEV_LOG_ERR("Unregistration of event dispatcher service "
+ "failed with error code %d\n", rc);
+
+ return rc;
+}
+
+int
+rte_event_dispatcher_create(uint8_t id, uint8_t event_dev_id)
+{
+ int socket_id;
+ struct rte_event_dispatcher *dispatcher;
+ int rc;
+
+ if (red_has_dispatcher(id)) {
+ RTE_EDEV_LOG_ERR("Dispatcher with id %d already exists\n",
+ id);
+ return -EEXIST;
+ }
+
+ socket_id = rte_event_dev_socket_id(event_dev_id);
+
+ dispatcher =
+ rte_malloc_socket("event dispatcher",
+ sizeof(struct rte_event_dispatcher),
+ RTE_CACHE_LINE_SIZE, socket_id);
+
+ if (dispatcher == NULL) {
+ RTE_EDEV_LOG_ERR("Unable to allocate memory for event "
+ "dispatcher\n");
+ return -ENOMEM;
+ }
+
+ *dispatcher = (struct rte_event_dispatcher) {
+ .id = id,
+ .event_dev_id = event_dev_id,
+ .socket_id = socket_id
+ };
+
+ rc = red_service_register(dispatcher);
+
+ if (rc < 0) {
+ rte_free(dispatcher);
+ return rc;
+ }
+
+ red_set_dispatcher(id, dispatcher);
+
+ return 0;
+}
+
+int
+rte_event_dispatcher_free(uint8_t id)
+{
+ struct rte_event_dispatcher *dispatcher;
+ int rc;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ rc = red_service_unregister(dispatcher);
+
+ if (rc)
+ return rc;
+
+ red_set_dispatcher(id, NULL);
+
+ rte_free(dispatcher);
+
+ return 0;
+}
+
+int
+rte_event_dispatcher_service_id_get(uint8_t id, uint32_t *service_id)
+{
+ struct rte_event_dispatcher *dispatcher;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ *service_id = dispatcher->service_id;
+
+ return 0;
+}
+
+static int
+lcore_port_index(struct rte_event_dispatcher_lcore *lcore,
+ uint8_t event_port_id)
+{
+ uint16_t i;
+
+ for (i = 0; i < lcore->num_ports; i++) {
+ struct rte_event_dispatcher_lcore_port *port =
+ &lcore->ports[i];
+
+ if (port->port_id == event_port_id)
+ return i;
+ }
+
+ return -1;
+}
+
+int
+rte_event_dispatcher_bind_port_to_lcore(uint8_t id, uint8_t event_port_id,
+ uint16_t batch_size, uint64_t timeout,
+ unsigned int lcore_id)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_lcore *lcore;
+ struct rte_event_dispatcher_lcore_port *port;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ lcore = &dispatcher->lcores[lcore_id];
+
+ if (lcore->num_ports == RED_MAX_PORTS_PER_LCORE)
+ return -ENOMEM;
+
+ if (lcore_port_index(lcore, event_port_id) >= 0)
+ return -EEXIST;
+
+ port = &lcore->ports[lcore->num_ports];
+
+ *port = (struct rte_event_dispatcher_lcore_port) {
+ .port_id = event_port_id,
+ .batch_size = batch_size,
+ .timeout = timeout
+ };
+
+ lcore->num_ports++;
+
+ return 0;
+}
+
+int
+rte_event_dispatcher_unbind_port_from_lcore(uint8_t id, uint8_t event_port_id,
+ unsigned int lcore_id)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_lcore *lcore;
+ int port_idx;
+ struct rte_event_dispatcher_lcore_port *port;
+ struct rte_event_dispatcher_lcore_port *last;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ lcore = &dispatcher->lcores[lcore_id];
+
+ port_idx = lcore_port_index(lcore, event_port_id);
+
+ if (port_idx < 0)
+ return -ENOENT;
+
+ port = &lcore->ports[port_idx];
+ last = &lcore->ports[lcore->num_ports - 1];
+
+ if (port != last)
+ *port = *last;
+
+ lcore->num_ports--;
+
+ return 0;
+}
+
+static struct rte_event_dispatcher_handler*
+red_get_handler_by_id(struct rte_event_dispatcher *dispatcher,
+ int handler_id)
+{
+ int i;
+
+ for (i = 0; i < dispatcher->num_handlers; i++) {
+ struct rte_event_dispatcher_handler *handler =
+ &dispatcher->handlers[i];
+
+ if (handler->id == handler_id)
+ return handler;
+ }
+
+ return NULL;
+}
+
+static int
+red_alloc_handler_id(struct rte_event_dispatcher *dispatcher)
+{
+ int handler_id = 0;
+
+ while (red_get_handler_by_id(dispatcher, handler_id) != NULL)
+ handler_id++;
+
+ return handler_id;
+}
+
+static struct rte_event_dispatcher_handler *
+red_alloc_handler(struct rte_event_dispatcher *dispatcher)
+{
+ int handler_idx;
+ struct rte_event_dispatcher_handler *handler;
+
+ if (dispatcher->num_handlers == RED_MAX_HANDLERS)
+ return NULL;
+
+ handler_idx = dispatcher->num_handlers;
+ handler = &dispatcher->handlers[handler_idx];
+
+ handler->id = red_alloc_handler_id(dispatcher);
+
+ dispatcher->num_handlers++;
+
+ return handler;
+}
+
+int
+rte_event_dispatcher_register(uint8_t id,
+ rte_event_dispatcher_match_t match_fun,
+ void *match_data,
+ rte_event_dispatcher_process_t process_fun,
+ void *process_data)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_handler *handler;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ handler = red_alloc_handler(dispatcher);
+
+ if (handler == NULL)
+ return -ENOMEM;
+
+ handler->match_fun = match_fun;
+ handler->match_data = match_data;
+ handler->process_fun = process_fun;
+ handler->process_data = process_data;
+
+ return handler->id;
+}
+
+int
+rte_event_dispatcher_unregister(uint8_t id, int handler_id)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_handler *unreg_handler;
+ int handler_idx;
+ uint16_t last_idx;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ unreg_handler = red_get_handler_by_id(dispatcher, handler_id);
+
+ if (unreg_handler == NULL)
+ return -EINVAL;
+
+ handler_idx = &dispatcher->handlers[0] - unreg_handler;
+
+ last_idx = dispatcher->num_handlers - 1;
+
+ if (handler_idx != last_idx) {
+ /* move all handlers to maintain handler order */
+ int n = last_idx - handler_idx;
+ memmove(unreg_handler, unreg_handler + 1,
+ sizeof(struct rte_event_dispatcher_handler) * n);
+ }
+
+ dispatcher->num_handlers--;
+
+ return 0;
+}
+
+static struct rte_event_dispatcher_finalizer*
+red_get_finalizer_by_id(struct rte_event_dispatcher *dispatcher,
+ int handler_id)
+{
+ int i;
+
+ for (i = 0; i < dispatcher->num_finalizers; i++) {
+ struct rte_event_dispatcher_finalizer *finalizer =
+ &dispatcher->finalizers[i];
+
+ if (finalizer->id == handler_id)
+ return finalizer;
+ }
+
+ return NULL;
+}
+
+static int
+red_alloc_finalizer_id(struct rte_event_dispatcher *dispatcher)
+{
+ int finalizer_id = 0;
+
+ while (red_get_finalizer_by_id(dispatcher, finalizer_id) != NULL)
+ finalizer_id++;
+
+ return finalizer_id;
+}
+
+static struct rte_event_dispatcher_finalizer *
+red_alloc_finalizer(struct rte_event_dispatcher *dispatcher)
+{
+ int finalizer_idx;
+ struct rte_event_dispatcher_finalizer *finalizer;
+
+ if (dispatcher->num_finalizers == RED_MAX_FINALIZERS)
+ return NULL;
+
+ finalizer_idx = dispatcher->num_finalizers;
+ finalizer = &dispatcher->finalizers[finalizer_idx];
+
+ finalizer->id = red_alloc_finalizer_id(dispatcher);
+
+ dispatcher->num_finalizers++;
+
+ return finalizer;
+}
+
+int
+rte_event_dispatcher_finalize_register(uint8_t id,
+ rte_event_dispatcher_finalize_t finalize_fun,
+ void *finalize_data)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_finalizer *finalizer;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ finalizer = red_alloc_finalizer(dispatcher);
+
+ if (finalizer == NULL)
+ return -ENOMEM;
+
+ finalizer->finalize_fun = finalize_fun;
+ finalizer->finalize_data = finalize_data;
+
+ return finalizer->id;
+}
+
+int
+rte_event_dispatcher_finalize_unregister(uint8_t id, int handler_id)
+{
+ struct rte_event_dispatcher *dispatcher;
+ struct rte_event_dispatcher_finalizer *unreg_finalizer;
+ int handler_idx;
+ uint16_t last_idx;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ unreg_finalizer = red_get_finalizer_by_id(dispatcher, handler_id);
+
+ if (unreg_finalizer == NULL)
+ return -EINVAL;
+
+ handler_idx = &dispatcher->finalizers[0] - unreg_finalizer;
+
+ last_idx = dispatcher->num_finalizers - 1;
+
+ if (handler_idx != last_idx) {
+ /* move all finalizers to maintain finalizer order */
+ int n = last_idx - handler_idx;
+ memmove(unreg_finalizer, unreg_finalizer + 1,
+ sizeof(struct rte_event_dispatcher_finalizer) * n);
+ }
+
+ dispatcher->num_finalizers--;
+
+ return 0;
+}
+
+static void
+red_aggregate_stats(struct rte_event_dispatcher_stats *result,
+ const struct rte_event_dispatcher_stats *part)
+{
+ result->poll_count += part->poll_count;
+ result->ev_dispatch_count += part->ev_dispatch_count;
+ result->ev_drop_count += part->ev_drop_count;
+}
+
+int
+rte_event_dispatcher_stats_get(uint8_t id,
+ struct rte_event_dispatcher_stats *stats)
+{
+ struct rte_event_dispatcher *dispatcher;
+ unsigned int lcore_id;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ *stats = (struct rte_event_dispatcher_stats) {};
+
+ for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+ struct rte_event_dispatcher_lcore *lcore =
+ &dispatcher->lcores[lcore_id];
+
+ red_aggregate_stats(stats, &lcore->stats);
+ }
+
+ return 0;
+}
+
+static int
+red_set_service_runstate(uint8_t id, int state)
+{
+ struct rte_event_dispatcher *dispatcher;
+ int rc;
+
+ RED_VALID_ID_OR_RET_EINVAL(id);
+ dispatcher = red_get_dispatcher(id);
+
+ rc = rte_service_component_runstate_set(dispatcher->service_id,
+ state);
+
+ if (rc != 0) {
+ RTE_EDEV_LOG_ERR("Unexpected error %d occurred while setting "
+ "service component run state to %d\n", rc,
+ state);
+ RTE_ASSERT(0);
+ }
+
+ return 0;
+}
+
+int
+rte_event_dispatcher_start(uint8_t id)
+{
+ return red_set_service_runstate(id, 1);
+}
+
+int
+rte_event_dispatcher_stop(uint8_t id)
+{
+ return red_set_service_runstate(id, 0);
+}
new file mode 100644
@@ -0,0 +1,440 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2023 Ericsson AB
+ */
+
+#ifndef __RTE_EVENT_DISPATCHER_H__
+#define __RTE_EVENT_DISPATCHER_H__
+
+/**
+ * @file
+ *
+ * RTE Event Dispatcher
+ *
+ * The purpose of the event dispatcher is to decouple different parts
+ * of an application (e.g., modules), sharing the same underlying
+ * event device.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_eventdev.h>
+
+/**
+ * Function prototype for match callbacks.
+ *
+ * Match callbacks are used by an application to decide how to the
+ * event dispatcher distributes events to different parts of the
+ * application.
+ *
+ * The application is not expected to process the event at the point
+ * of the match call. Such matters should be deferred to the process
+ * callback invocation.
+ *
+ * The match callback may be used as an opportunity to prefetch data.
+ *
+ * @param event
+ * Pointer to event
+ *
+ * @param cb_data
+ * The pointer supplied by the application in
+ * rte_event_dispatcher_register().
+ *
+ * @return
+ * Returns true in case this events should be delivered (via
+ * the process callback), and false otherwise.
+ */
+typedef bool
+(*rte_event_dispatcher_match_t)(const struct rte_event *event, void *cb_data);
+
+/**
+ * Function prototype for process callbacks.
+ *
+ * The process callbacks are used by the event dispatcher to deliver
+ * events for processing.
+ *
+ * @param event_dev_id
+ * The originating event device id.
+ *
+ * @param event_port_id
+ * The originating event port.
+ *
+ * @param events
+ * Pointer to an array of events.
+ *
+ * @param num
+ * The number of events in the @p events array.
+ *
+ * @param cb_data
+ * The pointer supplied by the application in
+ * rte_event_dispatcher_register().
+ */
+
+typedef void
+(*rte_event_dispatcher_process_t)(uint8_t event_dev_id, uint8_t event_port_id,
+ const struct rte_event *events,
+ uint16_t num, void *cb_data);
+
+/**
+ * Function prototype for finalize callbacks.
+ *
+ * Using a finalize callback, the application may ask to be notified when a
+ * complete batch of events have been delivered to the various process
+ * callbacks.
+ *
+ * @param event_dev_id
+ * The originating event device id.
+ *
+ * @param event_port_id
+ * The originating event port.
+ *
+ * @param cb_data
+ * The pointer supplied by the application in
+ * rte_event_dispatcher_finalize_register().
+ */
+
+typedef void
+(*rte_event_dispatcher_finalize_t)(uint8_t event_dev_id, uint8_t event_port_id,
+ void *cb_data);
+
+/**
+ * Event dispatcher statistics
+ */
+struct rte_event_dispatcher_stats {
+ uint64_t poll_count;
+ /**< Number of event dequeue calls made toward the event device. */
+ uint64_t ev_dispatch_count;
+ /**< Number of events dispatched to a handler.*/
+ uint64_t ev_drop_count;
+ /**< Number of events dropped because no handler was found. */
+};
+
+/**
+ * Create an event dispatcher with the specified id.
+ *
+ * @param id
+ * An application-specified, unique (across all event dispatcher
+ * instances) identifier.
+ *
+ * @param event_dev_id
+ * The identifier of the event device from which this event dispatcher
+ * will dequeue events.
+ *
+ * @return
+ * - 0: Success
+ * - <0: Error code on failure
+ */
+__rte_experimental
+int
+rte_event_dispatcher_create(uint8_t id, uint8_t event_dev_id);
+
+/**
+ * Free an event dispatcher.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @return
+ * - 0: Success
+ * - <0: Error code on failure
+ */
+__rte_experimental
+int
+rte_event_dispatcher_free(uint8_t id);
+
+/**
+ * Retrieve the service identifier of an event dispatcher.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param [out] service_id
+ * A pointer to a caller-supplied buffer where the event dispatcher's
+ * service id will be stored.
+ *
+ * @return
+ * - 0: Success
+ * - <0: Error code on failure.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_service_id_get(uint8_t id, uint32_t *service_id);
+
+/**
+ * Binds an event device port to a specific lcore on the specified
+ * event dispatcher.
+ *
+ * This function configures the event port id to be used by the event
+ * dispatcher service, if run on the specified lcore.
+ *
+ * Multiple event device ports may be bound to the same lcore. A
+ * particular port must not be bound to more than one lcore.
+ *
+ * If the event dispatcher service is mapped (with
+ * rte_service_map_lcore_set()) to a lcore for which no ports are
+ * bound, the service function will be a no-operation.
+ *
+ * This function is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param event_port_id
+ * The event device port identifier.
+ *
+ * @param batch_size
+ * The batch size to use in rte_event_dequeue_burst(), for the
+ * configured event device port and lcore.
+ *
+ * @param timeout
+ * The timeout parameter to use in rte_event_dequeue_burst(), for the
+ * configured event device port and lcore.
+ *
+ * @param lcore_id
+ * The lcore by which this event port will be used.
+ *
+ * @return
+ * - 0: Success
+ * - -ENOMEM: Unable to allocate sufficient resources.
+ * - -EEXISTS: Event port is already configured.
+ * - -EINVAL: Invalid arguments.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_bind_port_to_lcore(uint8_t id, uint8_t event_port_id,
+ uint16_t batch_size, uint64_t timeout,
+ unsigned int lcore_id);
+
+/**
+ * Unbind an event device port from a specific lcore.
+ *
+ * This function is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param event_port_id
+ * The event device port identifier.
+ *
+ * @param lcore_id
+ * The lcore which was using this event port.
+ *
+ * @return
+ * - 0: Success
+ * - -EINVAL: Invalid @c id.
+ * - -ENOENT: Event port id not bound to this @c lcore_id.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_unbind_port_from_lcore(uint8_t id, uint8_t event_port_id,
+ unsigned int lcore_id);
+
+/**
+ * Register an event handler.
+ *
+ * The match callback function is used to select if a particular event
+ * should be delivered, using the corresponding process callback
+ * function.
+ *
+ * The reason for having two distinct steps is to allow the dispatcher
+ * to deliver all events as a batch. This in turn will cause
+ * processing of a particular kind of events to happen in a
+ * back-to-back manner, improving cache locality.
+ *
+ * The list of handler callback functions is shared among all lcores,
+ * but will only be executed on lcores which has an eventdev port
+ * bound to them, and which are running the dispatcher service.
+ *
+ * Ordering of events is not guaranteed to be maintained between
+ * different deliver callbacks. For example, suppose there are two
+ * callbacks registered, matching different subsets of events an
+ * atomic queue. A batch of events [ev0, ev1, ev2] are dequeued on a
+ * particular port, all pertaining to the same flow. The match
+ * callback for registration A returns true for ev0 and ev2, and the
+ * matching function for registration B for ev1. In that scenario, the
+ * event dispatcher may choose to deliver first [ev0, ev2] using A's
+ * deliver function, and then [ev1] to B - or vice versa.
+ *
+ * rte_event_dispatcher_register() is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param match_fun
+ * The match callback function.
+ *
+ * @param match_cb_data
+ * A pointer to some application-specific opaque data (or NULL),
+ * which is supplied back to the application when match_fun is
+ * called.
+ *
+ * @param process_fun
+ * The process callback function.
+ *
+ * @param process_cb_data
+ * A pointer to some application-specific opaque data (or NULL),
+ * which is supplied back to the application when process_fun is
+ * called.
+ *
+ * @return
+ * - >= 0: The identifier for this registration.
+ * - -ENOMEM: Unable to allocate sufficient resources.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_register(uint8_t id,
+ rte_event_dispatcher_match_t match_fun,
+ void *match_cb_data,
+ rte_event_dispatcher_process_t process_fun,
+ void *process_cb_data);
+
+/**
+ * Unregister an event handler.
+ *
+ * This function is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param handler_id
+ * The handler registration id returned by the original
+ * rte_event_dispatcher_register() call.
+ *
+ * @return
+ * - 0: Success
+ * - -EINVAL: The @c id and/or the @c handler_id parameter was invalid.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_unregister(uint8_t id, int handler_id);
+
+/**
+ * Registers a finalize callback function.
+ *
+ * An application may optionally install a finalize callback.
+ *
+ * The finalize callback is called when all event of a particular
+ * batch of events (retrieve using rte_event_dequeue_burst()) have
+ * been delivered (or dropped).
+ *
+ * The finalize callback is not tied to any particular handler.
+ *
+ * The finalize callback provides an opportunity for the application
+ * to do per-batch processing. One case where this may be useful is if
+ * an event output buffer is used, and is shared among several
+ * handlers. In such a case, proper output buffer flushing may be
+ * assured using a finalize callback.
+ *
+ * rte_event_dispatcher_finalize_register() is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param finalize_fun
+ * The function called after completing the processing of a
+ * dequeue batch.
+ *
+ * @param finalize_data
+ * A pointer to some application-specific opaque data (or NULL),
+ * which is supplied back to the application when @c finalize_fun is
+ * called.
+ *
+ * @return
+ * - >= 0: The identifier for this registration.
+ * - -ENOMEM: Unable to allocate sufficient resources.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_finalize_register(uint8_t id,
+ rte_event_dispatcher_finalize_t finalize_fun,
+ void *finalize_data);
+
+/**
+ * Unregister an event handler.
+ *
+ * This function is not MT safe.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @param reg_id
+ * The finalize registration id returned by the original
+ * rte_event_dispatcher_finalize_register() call.
+ *
+ * @return
+ * - 0: Success
+ * - -EINVAL: The @c id and/or the @c reg_id parameter was invalid.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_finalize_unregister(uint8_t id, int reg_id);
+
+/**
+ * Start an event dispatcher instance.
+ *
+ * Enables the event dispatcher service.
+ *
+ * The underlying event device must have been started prior to calling
+ * rte_event_dispatcher_start().
+ *
+ * For the event dispatcher to actually perform work (i.e., dispatch
+ * events), its service must have been mapped to one or more service
+ * lcores, and its service run state set to '1'. An event dispatcher's
+ * service is retrieved using rte_event_dispatcher_service_id_get().
+ *
+ * Each service lcore to which the event dispatcher is mapped should
+ * have at least one event port configured. Such configuration is
+ * performed by calling rte_event_dispatcher_bind_port_to_lcore(),
+ * prior to starting the event dispatcher.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @return
+ * - 0: Success
+ * - -EINVAL: Invalid @c id.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_start(uint8_t id);
+
+/**
+ * Stop a running event dispatcher instance.
+ *
+ * Disables the event dispatcher service.
+ *
+ * @param id
+ * The event dispatcher identifier.
+ *
+ * @return
+ * - 0: Success
+ * - -EINVAL: Invalid @c id.
+ */
+__rte_experimental
+int
+rte_event_dispatcher_stop(uint8_t id);
+
+/**
+ * Retrieve statistics for an event dispatcher instance.
+ *
+ * This function is MT safe and may be called from any thread
+ * (including unregistered non-EAL threads).
+ *
+ * @param id
+ * The event dispatcher identifier.
+ * @param[out] stats
+ * A pointer to a structure to fill with statistics.
+ * @return
+ * - 0: Success
+ * - -EINVAL: The @c id parameter was invalid.
+ */
+int
+rte_event_dispatcher_stats_get(uint8_t id,
+ struct rte_event_dispatcher_stats *stats);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __RTE_EVENT_DISPATCHER__ */
@@ -131,6 +131,18 @@ EXPERIMENTAL {
rte_event_eth_tx_adapter_runtime_params_init;
rte_event_eth_tx_adapter_runtime_params_set;
rte_event_timer_remaining_ticks_get;
+
+ rte_event_dispatcher_create;
+ rte_event_dispatcher_free;
+ rte_event_dispatcher_service_id_get;
+ rte_event_dispatcher_bind_port_to_lcore;
+ rte_event_dispatcher_unbind_port_from_lcore;
+ rte_event_dispatcher_register;
+ rte_event_dispatcher_unregister;
+ rte_event_dispatcher_finalize_register;
+ rte_event_dispatcher_finalize_unregister;
+ rte_event_dispatcher_start;
+ rte_event_dispatcher_stop;
};
INTERNAL {