rte_eventdev.h(3) DPDK rte_eventdev.h(3) NAME rte_eventdev.h SYNOPSIS #include <rte_bitops.h> #include <rte_common.h> #include <rte_compat.h> #include <rte_errno.h> #include <rte_mbuf_pool_ops.h> #include <rte_mempool.h> #include 'rte_eventdev_trace_fp.h' #include <rte_eventdev_core.h> Data Structures struct rte_event_dev_info struct rte_event_dev_config struct rte_event_queue_conf struct rte_event_port_conf struct rte_event struct rte_event_dev_xstats_name Macros #define RTE_EVENT_DEV_CAP_QUEUE_QOS RTE_BIT32(0) #define RTE_EVENT_DEV_CAP_EVENT_QOS RTE_BIT32(1) #define RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED RTE_BIT32(2) #define RTE_EVENT_DEV_CAP_QUEUE_ALL_TYPES RTE_BIT32(3) #define RTE_EVENT_DEV_CAP_BURST_MODE RTE_BIT32(4) #define RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE RTE_BIT32(5) #define RTE_EVENT_DEV_CAP_NONSEQ_MODE RTE_BIT32(6) #define RTE_EVENT_DEV_CAP_RUNTIME_PORT_LINK RTE_BIT32(7) #define RTE_EVENT_DEV_CAP_MULTIPLE_QUEUE_PORT RTE_BIT32(8) #define RTE_EVENT_DEV_CAP_CARRY_FLOW_ID RTE_BIT32(9) #define RTE_EVENT_DEV_CAP_MAINTENANCE_FREE RTE_BIT32(10) #define RTE_EVENT_DEV_CAP_RUNTIME_QUEUE_ATTR RTE_BIT32(11) #define RTE_EVENT_DEV_CAP_PROFILE_LINK RTE_BIT32(12) #define RTE_EVENT_DEV_CAP_ATOMIC RTE_BIT32(13) #define RTE_EVENT_DEV_CAP_ORDERED RTE_BIT32(14) #define RTE_EVENT_DEV_CAP_PARALLEL RTE_BIT32(15) #define RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ RTE_BIT32(16) #define RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE RTE_BIT32(17) #define RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE_ADAPTIVE RTE_BIT32(18) #define RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE RTE_BIT32(19) #define RTE_EVENT_DEV_CAP_PRESCHEDULE_EXPLICIT RTE_BIT32(20) #define RTE_EVENT_DEV_PRIORITY_HIGHEST 0 #define RTE_EVENT_DEV_PRIORITY_NORMAL 128 #define RTE_EVENT_DEV_PRIORITY_LOWEST 255 #define RTE_EVENT_QUEUE_WEIGHT_HIGHEST 255 #define RTE_EVENT_QUEUE_WEIGHT_LOWEST 0 #define RTE_EVENT_QUEUE_AFFINITY_HIGHEST 255 #define RTE_EVENT_QUEUE_AFFINITY_LOWEST 0 #define RTE_EVENT_DEV_ATTR_PORT_COUNT 0 #define RTE_EVENT_DEV_ATTR_QUEUE_COUNT 1 #define RTE_EVENT_DEV_ATTR_STARTED 2 #define RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT RTE_BIT32(0) #define RTE_EVENT_QUEUE_CFG_ALL_TYPES RTE_BIT32(0) #define RTE_EVENT_QUEUE_CFG_SINGLE_LINK RTE_BIT32(1) #define RTE_EVENT_QUEUE_ATTR_PRIORITY 0 #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_FLOWS 1 #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_ORDER_SEQUENCES 2 #define RTE_EVENT_QUEUE_ATTR_EVENT_QUEUE_CFG 3 #define RTE_EVENT_QUEUE_ATTR_SCHEDULE_TYPE 4 #define RTE_EVENT_QUEUE_ATTR_WEIGHT 5 #define RTE_EVENT_QUEUE_ATTR_AFFINITY 6 #define RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL RTE_BIT32(0) #define RTE_EVENT_PORT_CFG_SINGLE_LINK RTE_BIT32(1) #define RTE_EVENT_PORT_CFG_HINT_PRODUCER RTE_BIT32(2) #define RTE_EVENT_PORT_CFG_HINT_CONSUMER RTE_BIT32(3) #define RTE_EVENT_PORT_CFG_HINT_WORKER RTE_BIT32(4) #define RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ RTE_BIT32(5) #define RTE_EVENT_PORT_ATTR_ENQ_DEPTH 0 #define RTE_EVENT_PORT_ATTR_DEQ_DEPTH 1 #define RTE_EVENT_PORT_ATTR_NEW_EVENT_THRESHOLD 2 #define RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE 3 #define RTE_EVENT_PORT_ATTR_INDEPENDENT_ENQ 4 #define RTE_SCHED_TYPE_ORDERED 0 #define RTE_SCHED_TYPE_ATOMIC 1 #define RTE_SCHED_TYPE_PARALLEL 2 #define RTE_EVENT_TYPE_ETHDEV 0x0 #define RTE_EVENT_TYPE_CRYPTODEV 0x1 #define RTE_EVENT_TYPE_TIMER 0x2 #define RTE_EVENT_TYPE_CPU 0x3 #define RTE_EVENT_TYPE_ETH_RX_ADAPTER 0x4 #define RTE_EVENT_TYPE_DMADEV 0x5 #define RTE_EVENT_TYPE_VECTOR 0x8 #define RTE_EVENT_TYPE_ETHDEV_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETHDEV) #define RTE_EVENT_TYPE_CPU_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_CPU) #define RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETH_RX_ADAPTER) #define RTE_EVENT_TYPE_CRYPTODEV_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_CRYPTODEV) #define RTE_EVENT_TYPE_MAX 0x10 #define RTE_EVENT_OP_NEW 0 #define RTE_EVENT_OP_FORWARD 1 #define RTE_EVENT_OP_RELEASE 2 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT 0x1 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_MULTI_EVENTQ 0x2 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_OVERRIDE_FLOW_ID 0x4 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_EVENT_VECTOR 0x8 #define RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT RTE_BIT32(0) #define RTE_EVENT_TIMER_ADAPTER_CAP_PERIODIC RTE_BIT32(1) #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_NEW 0x1 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD 0x2 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_QP_EV_BIND 0x4 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_SESSION_PRIVATE_DATA 0x8 #define RTE_EVENT_CRYPTO_ADAPTER_CAP_EVENT_VECTOR 0x10 #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_OP_NEW 0x1 #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_OP_FWD 0x2 #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_VCHAN_EV_BIND 0x4 #define RTE_EVENT_ETH_TX_ADAPTER_CAP_INTERNAL_PORT 0x1 #define RTE_EVENT_ETH_TX_ADAPTER_CAP_EVENT_VECTOR 0x2 #define RTE_EVENT_VECTOR_ADAPTER_CAP_INTERNAL_PORT 0x1 #define RTE_EVENT_DEV_XSTATS_NAME_SIZE 64 #define RTE_EVENT_DEV_MAINT_OP_FLUSH (1 << 0) Typedefs typedef void(* rte_eventdev_port_flush_t) (uint8_t dev_id, struct rte_event event, void *arg) typedef void(* rte_eventdev_stop_flush_t) (uint8_t dev_id, struct rte_event event, void *arg) Enumerations enum rte_event_dev_preschedule_type { RTE_EVENT_PRESCHEDULE_NONE, RTE_EVENT_PRESCHEDULE, RTE_EVENT_PRESCHEDULE_ADAPTIVE } enum rte_event_dev_xstats_mode Functions uint8_t rte_event_dev_count (void) int rte_event_dev_get_dev_id (const char *name) int rte_event_dev_socket_id (uint8_t dev_id) int rte_event_dev_info_get (uint8_t dev_id, struct rte_event_dev_info *dev_info) int rte_event_dev_attr_get (uint8_t dev_id, uint32_t attr_id, uint32_t *attr_value) int rte_event_dev_configure (uint8_t dev_id, const struct rte_event_dev_config *dev_conf) int rte_event_queue_default_conf_get (uint8_t dev_id, uint8_t queue_id, struct rte_event_queue_conf *queue_conf) int rte_event_queue_setup (uint8_t dev_id, uint8_t queue_id, const struct rte_event_queue_conf *queue_conf) int rte_event_queue_attr_get (uint8_t dev_id, uint8_t queue_id, uint32_t attr_id, uint32_t *attr_value) int rte_event_queue_attr_set (uint8_t dev_id, uint8_t queue_id, uint32_t attr_id, uint64_t attr_value) int rte_event_port_default_conf_get (uint8_t dev_id, uint8_t port_id, struct rte_event_port_conf *port_conf) int rte_event_port_setup (uint8_t dev_id, uint8_t port_id, const struct rte_event_port_conf *port_conf) void rte_event_port_quiesce (uint8_t dev_id, uint8_t port_id, rte_event- dev_port_flush_t release_cb, void *args) int rte_event_port_attr_get (uint8_t dev_id, uint8_t port_id, uint32_t attr_id, uint32_t *attr_value) int rte_event_dev_start (uint8_t dev_id) void rte_event_dev_stop (uint8_t dev_id) int rte_event_dev_stop_flush_callback_register (uint8_t dev_id, rte_event- dev_stop_flush_t callback, void *userdata) int rte_event_dev_close (uint8_t dev_id) struct __rte_aligned (16) rte_event_vector int rte_event_eth_rx_adapter_caps_get (uint8_t dev_id, uint16_t eth_port_id, uint32_t *caps) int rte_event_timer_adapter_caps_get (uint8_t dev_id, uint32_t *caps) int rte_event_crypto_adapter_caps_get (uint8_t dev_id, uint8_t cdev_id, uint32_t *caps) __rte_experimental int rte_event_dma_adapter_caps_get (uint8_t dev_id, uint8_t dmadev_id, uint32_t *caps) int rte_event_eth_tx_adapter_caps_get (uint8_t dev_id, uint16_t eth_port_id, uint32_t *caps) int rte_event_dequeue_timeout_ticks (uint8_t dev_id, uint64_t ns, uint64_t *timeout_ticks) int rte_event_port_link (uint8_t dev_id, uint8_t port_id, const uint8_t queues[], const uint8_t priorities[], uint16_t nb_links) int rte_event_port_unlink (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint16_t nb_unlinks) __rte_experimental int rte_event_port_profile_links_set (uint8_t dev_id, uint8_t port_id, const uint8_t queues[], const uint8_t priorities[], uint16_t nb_links, uint8_t profile_id) __rte_experimental int rte_event_port_profile_unlink (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint16_t nb_unlinks, uint8_t pro- file_id) int rte_event_port_unlinks_in_progress (uint8_t dev_id, uint8_t port_id) int rte_event_port_links_get (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint8_t priorities[]) __rte_experimental int rte_event_port_profile_links_get (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint8_t priorities[], uint8_t pro- file_id) int rte_event_dev_service_id_get (uint8_t dev_id, uint32_t *service_id) int rte_event_dev_dump (uint8_t dev_id, FILE *f) int rte_event_dev_xstats_names_get (uint8_t dev_id, enum rte_event_dev_xs- tats_mode mode, uint8_t queue_port_id, struct rte_event_dev_xstats_name *xstats_names, uint64_t *ids, unsigned int size) int rte_event_dev_xstats_get (uint8_t dev_id, enum rte_event_dev_xs- tats_mode mode, uint8_t queue_port_id, const uint64_t ids[], uint64_t values[], unsigned int n) uint64_t rte_event_dev_xstats_by_name_get (uint8_t dev_id, const char *name, uint64_t *id) int rte_event_dev_xstats_reset (uint8_t dev_id, enum rte_event_dev_xs- tats_mode mode, int16_t queue_port_id, const uint64_t ids[], uint32_t nb_ids) int rte_event_dev_selftest (uint8_t dev_id) struct rte_mempool * rte_event_vector_pool_create (const char *name, un- signed int n, unsigned int cache_size, uint16_t nb_elem, int socket_id) static uint16_t rte_event_enqueue_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) static uint16_t rte_event_enqueue_new_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) static uint16_t rte_event_enqueue_forward_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) static uint16_t rte_event_dequeue_burst (uint8_t dev_id, uint8_t port_id, struct rte_event ev[], uint16_t nb_events, uint64_t timeout_ticks) static int rte_event_maintain (uint8_t dev_id, uint8_t port_id, int op) static uint8_t rte_event_port_profile_switch (uint8_t dev_id, uint8_t port_id, uint8_t profile_id) static __rte_experimental int rte_event_port_preschedule_modify (uint8_t dev_id, uint8_t port_id, enum rte_event_dev_preschedule_type type) static __rte_experimental void rte_event_port_preschedule (uint8_t dev_id, uint8_t port_id, enum rte_event_dev_preschedule_type type) Detailed Description RTE Event Device API In a traditional DPDK application model, the application polls Ethdev port RX queues to look for work, and processing is done in a run-to-completion manner, after which the packets are transmitted on a Ethdev TX queue. Load is distributed by statically assigning ports and queues to lcores, and NIC receive-side scaling (RSS), or similar, is employed to distribute network flows (and thus work) on the same port across multiple RX queues. In contrast, in an event-driven model, as supported by this 'eventdev' li- brary, incoming packets (or other input events) are fed into an event de- vice, which schedules those packets across the available lcores, in accor- dance with its configuration. This event-driven programming model offers applications automatic multicore scaling, dynamic load balancing, pipelin- ing, packet order maintenance, synchronization, and prioritization/quality of service. The Event Device API is composed of two parts: * The application-oriented Event API that includes functions to setup an event device (configure it, setup its queues, ports and start it), to es- tablish the links between queues and ports to receive events, and so on. * The driver-oriented Event API that exports a function allowing an event poll Mode Driver (PMD) to register itself as an event device driver. Application-oriented Event API Event device components: +-----------------+ | +-------------+ | +-------+ | | flow 0 | | |Packet | | +-------------+ | |event | | +-------------+ | | | | | flow 1 | |port_link(port0, queue0) +-------+ | +-------------+ | | +--------+ +-------+ | +-------------+ o-----v-----o |dequeue +------+ |Crypto | | | flow n | | | event +------->|Core 0| |work | | +-------------+ o----+ | port 0 | | | |done ev| | event queue 0 | | +--------+ +------+ +-------+ +-----------------+ | +-------+ | |Timer | +-----------------+ | +--------+ |expiry | | +-------------+ | +------o |dequeue +------+ |event | | | flow 0 | o-----------o event +------->|Core 1| +-------+ | +-------------+ | +----o port 1 | | | Event enqueue | +-------------+ | | +--------+ +------+ o-------------> | | flow 1 | | | enqueue( | +-------------+ | | queue_id, | | | +--------+ +------+ flow_id, | +-------------+ | | | |dequeue |Core 2| sched_type, | | flow n | o-----------o event +------->| | event_type, | +-------------+ | | | port 2 | +------+ subev_type, | event queue 1 | | +--------+ event) +-----------------+ | +--------+ | | |dequeue +------+ +-------+ +-----------------+ | | event +------->|Core n| |Core | | +-------------+ o-----------o port n | | | |(SW) | | | flow 0 | | | +--------+ +--+---+ |event | | +-------------+ | | | +-------+ | +-------------+ | | | ^ | | flow 1 | | | | | | +-------------+ o------+ | | | +-------------+ | | | | | flow n | | | | | +-------------+ | | | | event queue n | | | +-----------------+ | | | +-----------------------------------------------------------+ Event device: A hardware or software-based event scheduler. Event: Represents an item of work and is the smallest unit of scheduling. An event carries metadata, such as queue ID, scheduling type, and event priority, and data such as one or more packets or other kinds of buffers. Some examples of events are: * a software-generated item of work originating from a lcore, perhaps car- rying a packet to be processed. * a crypto work completion notification. * a timer expiry notification. Event queue: A queue containing events that are to be scheduled by the event device. An event queue contains events of different flows associated with scheduling types, such as atomic, ordered, or parallel. Each event given to an event device must have a valid event queue id field in the metadata, to specify on which event queue in the device the event must be placed, for later scheduling. Event port: An application's interface into the event dev for enqueue and dequeue operations. Each event port can be linked with one or more event queues for dequeue operations. Enqueue and dequeue from a port is not thread-safe, and the expected use-case is that each port is polled by only a single lcore. [If this is not the case, a suitable synchronization mecha- nism should be used to prevent simultaneous access from multiple lcores.] To schedule events to an lcore, the event device will schedule them to the event port(s) being polled by that lcore. NOTE: By default, all the functions of the Event Device API exported by a PMD are non-thread-safe functions, which must not be invoked on the same object in parallel on different logical cores. For instance, the dequeue function of a PMD cannot be invoked in parallel on two logical cores to op- erate on same event port. Of course, this function can be invoked in paral- lel by different logical cores on different ports. It is the responsibility of the upper level application to enforce this rule. In all functions of the Event API, the Event device is designated by an in- teger >= 0 named the device identifier dev_id The functions exported by the application Event API to setup a device must be invoked in the following order: * rte_event_dev_configure() * rte_event_queue_setup() * rte_event_port_setup() * rte_event_port_link() * rte_event_dev_start() Then, the application can invoke, in any order, the functions exported by the Event API to dequeue events, enqueue events, and link and unlink event queue(s) to event ports. Before configuring a device, an application should call rte_event_dev_info_get() to determine the capabilities of the event device, and any queue or port limits of that device. The parameters set in the var- ious device configuration structures may need to be adjusted based on the max values provided in the device information structure returned from the rte_event_dev_info_get() API. An application may use rte_event_queue_de- fault_conf_get() or rte_event_port_default_conf_get() to get the default configuration to set up an event queue or event port by overriding few de- fault values. If the application wants to change the configuration (i.e. call rte_event_dev_configure(), rte_event_queue_setup(), or rte_event_port_setup()), it must call rte_event_dev_stop() first to stop the device and then do the reconfiguration before calling rte_event_dev_start() again. The schedule, enqueue and dequeue functions should not be invoked when the device is stopped. Finally, an application can close an Event device by invoking the rte_event_dev_close() function. Once closed, a device cannot be reconfig- ured or restarted. Driver-Oriented Event API At the Event driver level, Event devices are represented by a generic data structure of type rte_event_dev. Event devices are dynamically registered during the PCI/SoC device probing phase performed at EAL initialization time. When an Event device is being probed, an rte_event_dev structure is allocated for it and the event_dev_init() function supplied by the Event driver is invoked to prop- erly initialize the device. The role of the device init function is to reset the device hardware or to initialize the software event driver implementation. If the device init operation is successful, the device is assigned a device id (dev_id) for application use. Otherwise, the rte_event_dev structure is freed. Each function of the application Event API invokes a specific function of the PMD that controls the target device designated by its device identi- fier. For this purpose, all device-specific functions of an Event driver are sup- plied through a set of pointers contained in a generic structure of type event_dev_ops. The address of the event_dev_ops structure is stored in the rte_event_dev structure by the device init function of the Event driver, which is invoked during the PCI/SoC device probing phase, as explained ear- lier. In other words, each function of the Event API simply retrieves the rte_event_dev structure associated with the device identifier and performs an indirect invocation of the corresponding driver function supplied in the event_dev_ops structure of the rte_event_dev structure. For performance reasons, the addresses of the fast-path functions of the event driver are not contained in the event_dev_ops structure. Instead, they are directly stored at the beginning of the rte_event_dev structure to avoid an extra indirect memory access during their invocation. Event Enqueue, Dequeue and Scheduling RTE event device drivers do not use interrupts for enqueue or dequeue oper- ation. Instead, Event drivers export Poll-Mode enqueue and dequeue func- tions to applications. The events are injected to event device through enqueue operation by event producers in the system. The typical event producers are ethdev subsystem for generating packet events, CPU(SW) for generating events based on dif- ferent stages of application processing, cryptodev for generating crypto work completion notification etc The dequeue operation gets one or more events from the event ports. The ap- plication processes the events and sends them to a downstream event queue through rte_event_enqueue_burst(), if it is an intermediate stage of event processing. On the final stage of processing, the application may use the Tx adapter API for maintaining the event ingress order while sending the packet/event on the wire via NIC Tx. The point at which events are scheduled to ports depends on the device. For hardware devices, scheduling occurs asynchronously without any software in- tervention. Software schedulers can either be distributed (each worker thread schedules events to its own port) or centralized (a dedicated thread schedules to all ports). Distributed software schedulers perform the sched- uling inside the enqueue or dequeue functions, whereas centralized software schedulers need a dedicated service core for scheduling. The absence of the RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED capability flag indicates that the de- vice is centralized and thus needs a dedicated scheduling thread (generally an RTE service that should be mapped to one or more service cores) that re- peatedly calls the software specific scheduling function. An event driven worker thread has following typical workflow on fastpath: while (1) { rte_event_dequeue_burst(...); (event processing) rte_event_enqueue_burst(...); } Definition in file rte_eventdev.h. Macro Definition Documentation #define RTE_EVENT_DEV_CAP_QUEUE_QOS RTE_BIT32(0) Event scheduling prioritization is based on the priority and weight associ- ated with each event queue. Events from a queue with highest priority are scheduled first. If the queues are of same priority, weight of the queues are considered to select a queue in a weighted round robin fashion. Subsequent dequeue calls from an event port could see events from the same event queue, if the queue is con- figured with an affinity count. Affinity count is the number of subsequent dequeue calls, in which an event port should use the same event queue if the queue is non-empty NOTE: A device may use both queue prioritization and event prioritization (RTE_EVENT_DEV_CAP_EVENT_QOS capability) when making packet scheduling de- cisions. See also rte_event_queue_setup() rte_event_queue_attr_set() Definition at line 270 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_EVENT_QOS RTE_BIT32(1) Event scheduling prioritization is based on the priority associated with each event. Priority of each event is supplied in rte_event structure on each enqueue operation. If this capability is not set, the priority field of the event structure is ignored for each event. NOTE: A device may use both queue prioritization (RTE_EVENT_DEV_CAP_QUEUE_QOS capability) and event prioritization when mak- ing packet scheduling decisions. See also rte_event_enqueue_burst() Definition at line 284 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED RTE_BIT32(2) Event device operates in distributed scheduling mode. In distributed scheduling mode, event scheduling happens in HW or rte_event_dequeue_burst() / rte_event_enqueue_burst() or the combination of these two. If the flag is not set then eventdev is centralized and thus needs a dedicated service core that acts as a scheduling thread. See also rte_event_dev_service_id_get() Definition at line 294 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_QUEUE_ALL_TYPES RTE_BIT32(3) Event device is capable of accepting enqueued events, of any type adver- tised as supported by the device, to all destination queues. When this capability is set, and RTE_EVENT_QUEUE_CFG_ALL_TYPES flag is set in rte_event_queue_conf::event_queue_cfg, the 'schedule_type' field of the rte_event_queue_conf structure is ignored when a queue is being configured. Instead the 'sched_type' field of each event enqueued is used to select the scheduling to be performed on that event. If this capability is not set, or the configuration flag is not set, the queue only supports events of the RTE_SCHED_TYPE_ type specified in the rte_event_queue_conf structure at time of configuration. The behaviour when events of other scheduling types are sent to the queue is undefined. See also RTE_EVENT_QUEUE_CFG_ALL_TYPES RTE_SCHED_TYPE_ATOMIC RTE_SCHED_TYPE_ORDERED RTE_SCHED_TYPE_PARALLEL rte_event_queue_conf.event_queue_cfg rte_event_queue_conf.schedule_type rte_event_enqueue_burst() Definition at line 318 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_BURST_MODE RTE_BIT32(4) Event device is capable of operating in burst mode for enqueue(forward, re- lease) and dequeue operation. If this capability is not set, application can still use the rte_event_de- queue_burst() and rte_event_enqueue_burst() but PMD accepts or returns only one event at a time. See also rte_event_dequeue_burst() rte_event_enqueue_burst() Definition at line 329 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE RTE_BIT32(5) Event device ports support disabling the implicit release feature, in which the port will release all unreleased events in its dequeue operation. If this capability is set and the port is configured with implicit release disabled, the application is responsible for explicitly releasing events using either the RTE_EVENT_OP_FORWARD or the RTE_EVENT_OP_RELEASE event en- queue operations. See also rte_event_dequeue_burst() rte_event_enqueue_burst() Definition at line 341 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_NONSEQ_MODE RTE_BIT32(6) Event device is capable of operating in non-sequential mode. The path of the event is not necessary to be sequential. Application can change the path of event at runtime and events may be sent to queues in any order. If the flag is not set, then event each event will follow a path from queue 0 to queue 1 to queue 2 etc. The eventdev will return an error when the ap- plication enqueues an event for a qid which is not the next in the se- quence. Definition at line 353 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_RUNTIME_PORT_LINK RTE_BIT32(7) Event device is capable of reconfiguring the queue/port link at runtime. If the flag is not set, the eventdev queue/port link is only can be config- ured during initialization, or by stopping the device and then later restarting it after reconfiguration. See also rte_event_port_link() rte_event_port_unlink() Definition at line 364 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_MULTIPLE_QUEUE_PORT RTE_BIT32(8) Event device is capable of setting up links between multiple queues and a single port. If the flag is not set, each port may only be linked to a single queue, and so can only receive events from that queue. However, each queue may be linked to multiple ports. See also rte_event_port_link() Definition at line 374 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_CARRY_FLOW_ID RTE_BIT32(9) Event device preserves the flow ID from the enqueued event to the dequeued event. If this flag is not set, the content of the flow-id field in dequeued events is implementation dependent. See also rte_event_dequeue_burst() Definition at line 383 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_MAINTENANCE_FREE RTE_BIT32(10) Event device does not require calls to rte_event_maintain(). An event device that does not set this flag requires calls to rte_event_maintain() during periods when neither rte_event_dequeue_burst() nor rte_event_enqueue_burst() are called on a port. This will allow the event device to perform internal processing, such as flushing buffered events, return credits to a global pool, or process signaling related to load balancing. See also rte_event_maintain() Definition at line 396 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_RUNTIME_QUEUE_ATTR RTE_BIT32(11) Event device is capable of changing the queue attributes at runtime i.e af- ter rte_event_queue_setup() or rte_event_dev_start() call sequence. If this flag is not set, event queue attributes can only be configured dur- ing rte_event_queue_setup(). See also rte_event_queue_setup() Definition at line 406 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_PROFILE_LINK RTE_BIT32(12) Event device is capable of supporting multiple link profiles per event port. When set, the value of rte_event_dev_info::max_profiles_per_port is greater than one, and multiple profiles may be configured and then switched at run- time. If not set, only a single profile may be configured, which may itself be runtime adjustable (if RTE_EVENT_DEV_CAP_RUNTIME_PORT_LINK is set). See also rte_event_port_profile_links_set() rte_event_port_profile_links_get() rte_event_port_profile_switch() RTE_EVENT_DEV_CAP_RUNTIME_PORT_LINK Definition at line 420 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_ATOMIC RTE_BIT32(13) Event device is capable of atomic scheduling. When this flag is set, the application can configure queues with scheduling type atomic on this event device. See also RTE_SCHED_TYPE_ATOMIC Definition at line 428 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_ORDERED RTE_BIT32(14) Event device is capable of ordered scheduling. When this flag is set, the application can configure queues with scheduling type ordered on this event device. See also RTE_SCHED_TYPE_ORDERED Definition at line 436 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_PARALLEL RTE_BIT32(15) Event device is capable of parallel scheduling. When this flag is set, the application can configure queues with scheduling type parallel on this event device. See also RTE_SCHED_TYPE_PARALLEL Definition at line 444 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ RTE_BIT32(16) Event device is capable of independent enqueue. A new capability, RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ, will indicate that Eventdev supports the enqueue in any order or specifically in a different order than the dequeue. Eventdev PMD can either dequeue events in the changed order in which they are enqueued or restore the original order before sending them to the un- derlying hardware device. A flag is provided during the port configuration to inform Eventdev PMD that the application intends to use an independent enqueue order on a particular port. Note that this capability only matters for eventdevs supporting burst mode. When an implicit release is enabled on a port, Eventdev PMD will also han- dle the insertion of RELEASE events in place of dropped events. The inde- pendent enqueue feature only applies to FORWARD and RELEASE events. New events (op=RTE_EVENT_OP_NEW) will be dequeued in the order the application enqueues them and do not maintain any order relative to FORWARD/RELEASE events. FORWARD vs NEW relaxed ordering only applies to ports that have en- abled independent enqueue feature. Definition at line 463 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE RTE_BIT32(17) Event device supports event pre-scheduling. When this capability is available, the application can enable event pre- scheduling on the event device to pre-schedule events to a event port when rte_event_dequeue_burst() is issued. The pre-schedule process starts with the rte_event_dequeue_burst() call and the pre-scheduled events are re- turned on the next rte_event_dequeue_burst() call. See also rte_event_dev_configure() Definition at line 475 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE_ADAPTIVE RTE_BIT32(18) Event device supports adaptive event pre-scheduling. When this capability is available, the application can enable adaptive pre- scheduling on the event device where the events are pre-scheduled when there are no forward progress constraints with the currently held flow con- texts. The pre-schedule process starts with the rte_event_dequeue_burst() call and the pre-scheduled events are returned on the next rte_event_de- queue_burst() call. See also rte_event_dev_configure() Definition at line 487 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE RTE_BIT32(19) Event device supports event pre-scheduling per event port. When this flag is set, the event device allows controlling the event pre- scheduling at a event port granularity. See also rte_event_dev_configure() rte_event_port_preschedule_modify() Definition at line 497 of file rte_eventdev.h. #define RTE_EVENT_DEV_CAP_PRESCHEDULE_EXPLICIT RTE_BIT32(20) Event device supports explicit pre-scheduling. When this flag is set, the application can issue pre-schedule request on a event port. See also rte_event_port_preschedule() Definition at line 506 of file rte_eventdev.h. #define RTE_EVENT_DEV_PRIORITY_HIGHEST 0 Highest priority level for events and queues. See also rte_event_queue_setup() rte_event_enqueue_burst() rte_event_port_link() Definition at line 515 of file rte_eventdev.h. #define RTE_EVENT_DEV_PRIORITY_NORMAL 128 Normal priority level for events and queues. See also rte_event_queue_setup() rte_event_enqueue_burst() rte_event_port_link() Definition at line 522 of file rte_eventdev.h. #define RTE_EVENT_DEV_PRIORITY_LOWEST 255 Lowest priority level for events and queues. See also rte_event_queue_setup() rte_event_enqueue_burst() rte_event_port_link() Definition at line 529 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_WEIGHT_HIGHEST 255 Highest weight of an event queue. See also rte_event_queue_attr_get() rte_event_queue_attr_set() Definition at line 537 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_WEIGHT_LOWEST 0 Lowest weight of an event queue. See also rte_event_queue_attr_get() rte_event_queue_attr_set() Definition at line 543 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_AFFINITY_HIGHEST 255 Highest scheduling affinity of an event queue. See also rte_event_queue_attr_get() rte_event_queue_attr_set() Definition at line 551 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_AFFINITY_LOWEST 0 Lowest scheduling affinity of an event queue. See also rte_event_queue_attr_get() rte_event_queue_attr_set() Definition at line 557 of file rte_eventdev.h. #define RTE_EVENT_DEV_ATTR_PORT_COUNT 0 The count of ports. Definition at line 709 of file rte_eventdev.h. #define RTE_EVENT_DEV_ATTR_QUEUE_COUNT 1 The count of queues. Definition at line 713 of file rte_eventdev.h. #define RTE_EVENT_DEV_ATTR_STARTED 2 The status of the device, zero for stopped, non-zero for started. Definition at line 717 of file rte_eventdev.h. #define RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT RTE_BIT32(0) Override the global dequeue_timeout_ns and use per dequeue timeout in ns. See also rte_event_dequeue_timeout_ticks(), rte_event_dequeue_burst() Definition at line 740 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_CFG_ALL_TYPES RTE_BIT32(0) Allow events with schedule types ATOMIC, ORDERED, and PARALLEL to be en- queued to this queue. The scheduling type to be used is that specified in each individual event. This flag can only be set when configuring queues on devices reporting the RTE_EVENT_DEV_CAP_QUEUE_ALL_TYPES capability. Without this flag, only events with the specific scheduling type configured at queue setup can be sent to the queue. See also RTE_EVENT_DEV_CAP_QUEUE_ALL_TYPES RTE_SCHED_TYPE_ORDERED, RTE_SCHED_TYPE_ATOMIC, RTE_SCHED_TYPE_PARALLEL rte_event_enqueue_burst() Definition at line 890 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_CFG_SINGLE_LINK RTE_BIT32(1) This event queue links only to a single event port. No load-balancing of events is performed, as all events sent to this queue end up at the same event port. The number of queues on which this flag is to be set must be configured at device configuration time, by setting rte_event_dev_config::nb_single_link_event_port_queues parameter appropri- ately. This flag serves as a hint only, any devices without specific support for single-link queues can fall-back automatically to using regular queues with a single destination port. See also rte_event_dev_info.max_single_link_event_port_queue_pairs rte_event_dev_config.nb_single_link_event_port_queues rte_event_port_setup(), rte_event_port_link() Definition at line 908 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_PRIORITY 0 Queue attribute id for the priority of the queue. Definition at line 1041 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_FLOWS 1 Queue attribute id for the number of atomic flows configured for the queue. Definition at line 1045 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_NB_ATOMIC_ORDER_SEQUENCES 2 Queue attribute id for the number of atomic order sequences configured for the queue. Definition at line 1049 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_EVENT_QUEUE_CFG 3 Queue attribute id for the configuration flags for the queue. Definition at line 1053 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_SCHEDULE_TYPE 4 Queue attribute id for the schedule type of the queue. Definition at line 1057 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_WEIGHT 5 Queue attribute id for the weight of the queue. Definition at line 1061 of file rte_eventdev.h. #define RTE_EVENT_QUEUE_ATTR_AFFINITY 6 Queue attribute id for the affinity of the queue. Definition at line 1065 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL RTE_BIT32(0) Configure the port not to release outstanding events in rte_event_dev_de- queue_burst(). If set, all events received through the port must be explic- itly released with RTE_EVENT_OP_RELEASE or RTE_EVENT_OP_FORWARD. Must be unset if the device is not RTE_EVENT_DEV_CAP_IMPLICIT_RELEASE_DISABLE capa- ble. Definition at line 1123 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_SINGLE_LINK RTE_BIT32(1) This event port links only to a single event queue. The queue it links with should be similarly configured with the RTE_EVENT_QUEUE_CFG_SINGLE_LINK flag. See also RTE_EVENT_QUEUE_CFG_SINGLE_LINK rte_event_port_setup(), rte_event_port_link() Definition at line 1131 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_HINT_PRODUCER RTE_BIT32(2) Hint that this event port will primarily enqueue events to the system. A PMD can optimize its internal workings by assuming that this port is pri- marily going to enqueue NEW events. Note that this flag is only a hint, so PMDs must operate under the assump- tion that any port can enqueue an event with any type of op. See also rte_event_port_setup() Definition at line 1141 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_HINT_CONSUMER RTE_BIT32(3) Hint that this event port will primarily dequeue events from the system. A PMD can optimize its internal workings by assuming that this port is pri- marily going to consume events, and not enqueue NEW or FORWARD events. Note that this flag is only a hint, so PMDs must operate under the assump- tion that any port can enqueue an event with any type of op. See also rte_event_port_setup() Definition at line 1152 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_HINT_WORKER RTE_BIT32(4) Hint that this event port will primarily pass existing events through. A PMD can optimize its internal workings by assuming that this port is pri- marily going to FORWARD events, and not enqueue NEW or RELEASE events of- ten. Note that this flag is only a hint, so PMDs must operate under the assump- tion that any port can enqueue an event with any type of op. See also rte_event_port_setup() Definition at line 1163 of file rte_eventdev.h. #define RTE_EVENT_PORT_CFG_INDEPENDENT_ENQ RTE_BIT32(5) Flag to enable independent enqueue. Must not be set if the device is not RTE_EVENT_DEV_CAP_INDEPENDENT_ENQ capable. This feature allows an applica- tion to enqueue RTE_EVENT_OP_FORWARD or RTE_EVENT_OP_RELEASE in an order different than the order the events were dequeued from the event device, while maintaining RTE_SCHED_TYPE_ATOMIC or RTE_SCHED_TYPE_ORDERED seman- tics. Note that this flag only matters for Eventdevs supporting burst mode. See also rte_event_port_setup() Definition at line 1175 of file rte_eventdev.h. #define RTE_EVENT_PORT_ATTR_ENQ_DEPTH 0 Port attribute id for the maximum size of a burst enqueue operation sup- ported on a port. Definition at line 1307 of file rte_eventdev.h. #define RTE_EVENT_PORT_ATTR_DEQ_DEPTH 1 Port attribute id for the maximum size of a dequeue burst which can be re- turned from a port. Definition at line 1311 of file rte_eventdev.h. #define RTE_EVENT_PORT_ATTR_NEW_EVENT_THRESHOLD 2 Port attribute id for the new event threshold of the port. Once the number of events in the system exceeds this threshold, the enqueue of NEW-type events will fail. Definition at line 1317 of file rte_eventdev.h. #define RTE_EVENT_PORT_ATTR_IMPLICIT_RELEASE_DISABLE 3 Port attribute id for the implicit release disable attribute of the port. Definition at line 1321 of file rte_eventdev.h. #define RTE_EVENT_PORT_ATTR_INDEPENDENT_ENQ 4 Port attribute id for the Independent Enqueue feature. Definition at line 1325 of file rte_eventdev.h. #define RTE_SCHED_TYPE_ORDERED 0 Ordered scheduling Events from an ordered flow of an event queue can be scheduled to multiple ports for concurrent processing while maintaining the original event order, i.e. the order in which they were first enqueued to that queue. This scheme allows events pertaining to the same, potentially large, flow to be processed in parallel on multiple cores without incurring any application- level order restoration logic overhead. After events are dequeued from a set of ports, as those events are re-en- queued to another queue (with the op field set to RTE_EVENT_OP_FORWARD), the event device restores the original event order - including events re- turned from all ports in the set - before the events are placed on the des- tination queue, for subsequent scheduling to ports. Any events not forwarded i.e. dropped explicitly via RELEASE or implicitly released by the next dequeue operation on a port, are skipped by the re- ordering stage and do not affect the reordering of other returned events. Any NEW events sent on a port are not ordered with respect to FORWARD events sent on the same port, since they have no original event order. They also are not ordered with respect to NEW events enqueued on other ports. However, NEW events to the same destination queue from the same port are guaranteed to be enqueued in the order they were submitted via rte_event_enqueue_burst(). NOTE: In restoring event order of forwarded events, the eventdev API guar- antees that all events from the same flow (i.e. same rte_event::flow_id, rte_event::priority and rte_event::queue_id) will be put in the original order before being forwarded to the destination queue. Some eventdevs may implement stricter ordering to achieve this aim, for example, restoring the order across all flows dequeued from the same ORDERED queue. See also rte_event_queue_setup(), rte_event_dequeue_burst(), RTE_EVENT_OP_RE- LEASE Definition at line 1535 of file rte_eventdev.h. #define RTE_SCHED_TYPE_ATOMIC 1 Atomic scheduling Events from an atomic flow, identified by a combination of rte_event::flow_id, rte_event::queue_id and rte_event::priority, can be scheduled only to a single port at a time. The port is guaranteed to have exclusive (atomic) access to the associated flow context, which enables the user to avoid SW synchronization. Atomic flows also maintain event ordering since only one port at a time can process events from each flow of an event queue, and events within a flow are not reordered within the scheduler. An atomic flow is locked to a port when events from that flow are first scheduled to that port. That lock remains in place until the application calls rte_event_dequeue_burst() from the same port, which implicitly re- leases the lock (if RTE_EVENT_PORT_CFG_DISABLE_IMPL_REL flag is not set). User may allow the scheduler to release the lock earlier than that by in- voking rte_event_enqueue_burst() with RTE_EVENT_OP_RELEASE operation for each event from that flow. NOTE: Where multiple events from the same queue and atomic flow are sched- uled to a port, the lock for that flow is only released once the last event from the flow is released, or forwarded to another queue. So long as there is at least one event from an atomic flow scheduled to a port/core (includ- ing any events in the port's dequeue queue, not yet read by the applica- tion), that port will hold the synchronization lock for that flow. See also rte_event_queue_setup(), rte_event_dequeue_burst(), RTE_EVENT_OP_RE- LEASE Definition at line 1562 of file rte_eventdev.h. #define RTE_SCHED_TYPE_PARALLEL 2 Parallel scheduling The scheduler performs priority scheduling, load balancing, etc. functions but does not provide additional event synchronization or ordering. It is free to schedule events from a single parallel flow of an event queue to multiple events ports for concurrent processing. The application is respon- sible for flow context synchronization and event ordering (SW synchroniza- tion). See also rte_event_queue_setup(), rte_event_dequeue_burst() Definition at line 1575 of file rte_eventdev.h. #define RTE_EVENT_TYPE_ETHDEV 0x0 The event generated from ethdev subsystem Definition at line 1579 of file rte_eventdev.h. #define RTE_EVENT_TYPE_CRYPTODEV 0x1 The event generated from crypodev subsystem Definition at line 1581 of file rte_eventdev.h. #define RTE_EVENT_TYPE_TIMER 0x2 The event generated from event timer adapter Definition at line 1583 of file rte_eventdev.h. #define RTE_EVENT_TYPE_CPU 0x3 The event generated from cpu for pipelining. Application may use sub_event_type to further classify the event Definition at line 1587 of file rte_eventdev.h. #define RTE_EVENT_TYPE_ETH_RX_ADAPTER 0x4 The event generated from event eth Rx adapter Definition at line 1589 of file rte_eventdev.h. #define RTE_EVENT_TYPE_DMADEV 0x5 The event generated from dma subsystem Definition at line 1591 of file rte_eventdev.h. #define RTE_EVENT_TYPE_VECTOR 0x8 Indicates that event is a vector. All vector event types should be a logi- cal OR of EVENT_TYPE_VECTOR. This simplifies the pipeline design as one can split processing the events between vector events and normal event across event types. Example: if (ev.event_type & RTE_EVENT_TYPE_VECTOR) { // Clas- sify and handle vector event. } else { // Classify and handle event. } Definition at line 1603 of file rte_eventdev.h. #define RTE_EVENT_TYPE_ETHDEV_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETHDEV) The event vector generated from ethdev subsystem Definition at line 1606 of file rte_eventdev.h. #define RTE_EVENT_TYPE_CPU_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_CPU) The event vector generated from cpu for pipelining. Definition at line 1608 of file rte_eventdev.h. #define RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_ETH_RX_ADAPTER) The event vector generated from eth Rx adapter. Definition at line 1611 of file rte_eventdev.h. #define RTE_EVENT_TYPE_CRYPTODEV_VECTOR (RTE_EVENT_TYPE_VECTOR | RTE_EVENT_TYPE_CRYPTODEV) The event vector generated from cryptodev adapter. Definition at line 1614 of file rte_eventdev.h. #define RTE_EVENT_TYPE_MAX 0x10 Maximum number of event types Definition at line 1617 of file rte_eventdev.h. #define RTE_EVENT_OP_NEW 0 The rte_event::op field must be set to this operation type to inject a new event, i.e. one not previously dequeued, into the event device, to be scheduled for processing. Definition at line 1624 of file rte_eventdev.h. #define RTE_EVENT_OP_FORWARD 1 The application must set the rte_event::op field to this operation type to return a previously dequeued event to the event device to be scheduled for further processing. This event must be enqueued to the same port that the event to be forwarded was dequeued from. The event's fields, including (but not limited to) flow_id, scheduling type, destination queue, and event payload e.g. mbuf pointer, may all be updated as desired by the application, but the rte_event::impl_opaque field must be kept to the same value as was present when the event was dequeued. Definition at line 1636 of file rte_eventdev.h. #define RTE_EVENT_OP_RELEASE 2 Release the flow context associated with the schedule type. If current flow's scheduler type method is RTE_SCHED_TYPE_ATOMIC then this operation type hints the scheduler that the user has completed critical section processing for this event in the current atomic context, and that the scheduler may unlock any atomic locks held for this event. If this is the last event from an atomic flow, i.e. all flow locks are released (see RTE_SCHED_TYPE_ATOMIC for details), the scheduler is now allowed to sched- ule events from that flow from to another port. However, the atomic locks may be still held until the next rte_event_dequeue_burst() call; enqueuing an event with opt type RTE_EVENT_OP_RELEASE is a hint only, allowing the scheduler to release the atomic locks early, but not requiring it to do so. Early atomic lock release may increase parallelism and thus system perfor- mance, but the user needs to design carefully the split into critical vs non-critical sections. If current flow's scheduler type method is RTE_SCHED_TYPE_ORDERED then this operation type informs the scheduler that the current event has completed processing and will not be returned to the scheduler, i.e. it has been dropped, and so the reordering context for that event should be considered filled. Events with this operation type must only be enqueued to the same port that the event to be released was dequeued from. The rte_event::impl_opaque field in the release event must have the same value as that in the original dequeued event. If a dequeued event is re-enqueued with operation type of RTE_EVENT_OP_RE- LEASE, then any subsequent enqueue of that event - or a copy of it - must be done as event of type RTE_EVENT_OP_NEW, not RTE_EVENT_OP_FORWARD. This is because any context for the originally dequeued event, i.e. atomic locks, or reorder buffer entries, will have been removed or invalidated by the release operation. Definition at line 1670 of file rte_eventdev.h. #define RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT 0x1 This flag is sent when the packet transfer mechanism is in HW. Ethdev can send packets to the event device using internal event port. Definition at line 1806 of file rte_eventdev.h. #define RTE_EVENT_ETH_RX_ADAPTER_CAP_MULTI_EVENTQ 0x2 Adapter supports multiple event queues per ethdev. Every ethdev Rx queue can be connected to a unique event queue. Definition at line 1810 of file rte_eventdev.h. #define RTE_EVENT_ETH_RX_ADAPTER_CAP_OVERRIDE_FLOW_ID 0x4 The application can override the adapter generated flow ID in the event. This flow ID can be specified when adding an ethdev Rx queue to the adapter using the ev.flow_id member. See also struct rte_event_eth_rx_adapter_queue_conf::ev struct rte_event_eth_rx_adapter_queue_conf::rx_queue_flags Definition at line 1817 of file rte_eventdev.h. #define RTE_EVENT_ETH_RX_ADAPTER_CAP_EVENT_VECTOR 0x8 Adapter supports event vectorization per ethdev. Definition at line 1819 of file rte_eventdev.h. #define RTE_EVENT_TIMER_ADAPTER_CAP_INTERNAL_PORT RTE_BIT32(0) This flag is set when the timer mechanism is in HW. Definition at line 1844 of file rte_eventdev.h. #define RTE_EVENT_TIMER_ADAPTER_CAP_PERIODIC RTE_BIT32(1) This flag is set if periodic mode is supported. Definition at line 1847 of file rte_eventdev.h. #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_NEW 0x1 Flag indicates HW is capable of generating events in RTE_EVENT_OP_NEW en- queue operation. Cryptodev will send packets to the event device as new events using an internal event port. Definition at line 1871 of file rte_eventdev.h. #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_OP_FWD 0x2 Flag indicates HW is capable of generating events in RTE_EVENT_OP_FORWARD enqueue operation. Cryptodev will send packets to the event device as for- warded event using an internal event port. Definition at line 1878 of file rte_eventdev.h. #define RTE_EVENT_CRYPTO_ADAPTER_CAP_INTERNAL_PORT_QP_EV_BIND 0x4 Flag indicates HW is capable of mapping crypto queue pair to event queue. Definition at line 1883 of file rte_eventdev.h. #define RTE_EVENT_CRYPTO_ADAPTER_CAP_SESSION_PRIVATE_DATA 0x8 Flag indicates HW/SW supports a mechanism to store and retrieve the private data information along with the crypto session. Definition at line 1888 of file rte_eventdev.h. #define RTE_EVENT_CRYPTO_ADAPTER_CAP_EVENT_VECTOR 0x10 Flag indicates HW is capable of aggregating processed crypto operations into rte_event_vector. Definition at line 1893 of file rte_eventdev.h. #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_OP_NEW 0x1 Flag indicates HW is capable of generating events in RTE_EVENT_OP_NEW en- queue operation. DMADEV will send packets to the event device as new events using an internal event port. Definition at line 1924 of file rte_eventdev.h. #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_OP_FWD 0x2 Flag indicates HW is capable of generating events in RTE_EVENT_OP_FORWARD enqueue operation. DMADEV will send packets to the event device as for- warded event using an internal event port. Definition at line 1931 of file rte_eventdev.h. #define RTE_EVENT_DMA_ADAPTER_CAP_INTERNAL_PORT_VCHAN_EV_BIND 0x4 Flag indicates HW is capable of mapping DMA vchan to event queue. Definition at line 1934 of file rte_eventdev.h. #define RTE_EVENT_ETH_TX_ADAPTER_CAP_INTERNAL_PORT 0x1 This flag is sent when the PMD supports a packet transmit callback Definition at line 1963 of file rte_eventdev.h. #define RTE_EVENT_ETH_TX_ADAPTER_CAP_EVENT_VECTOR 0x2 Indicates that the Tx adapter is capable of handling event vector of mbufs. Definition at line 1967 of file rte_eventdev.h. #define RTE_EVENT_VECTOR_ADAPTER_CAP_INTERNAL_PORT 0x1 This flag is set when the vector adapter is capable of generating events using an internal event port. Definition at line 1993 of file rte_eventdev.h. #define RTE_EVENT_DEV_XSTATS_NAME_SIZE 64 Maximum name length for extended statistics counters Definition at line 2397 of file rte_eventdev.h. #define RTE_EVENT_DEV_MAINT_OP_FLUSH (1 << 0) Force an immediately flush of any buffered events in the port, potentially at the cost of additional overhead. See also rte_event_maintain() Definition at line 2873 of file rte_eventdev.h. Typedef Documentation typedef void(* rte_eventdev_port_flush_t) (uint8_t dev_id, struct rte_event event, void *arg) Callback function prototype that can be passed during rte_event_port_re- lease(), invoked once per a released event. Definition at line 1269 of file rte_eventdev.h. typedef void(* rte_eventdev_stop_flush_t) (uint8_t dev_id, struct rte_event event, void *arg) Callback function called during rte_event_dev_stop(), invoked once per flushed event. Definition at line 1390 of file rte_eventdev.h. Enumeration Type Documentation enum rte_event_dev_preschedule_type Event device pre-schedule type enumeration. Enumerator RTE_EVENT_PRESCHEDULE_NONE Disable pre-schedule across the event device or on a given event port. rte_event_dev_config::preschedule_type rte_event_port_preschedule_modify() RTE_EVENT_PRESCHEDULE Enable pre-schedule always across the event device or a given event port. rte_event_dev_config::preschedule_type rte_event_port_preschedule_modify() See also RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE RTE_EVENT_PRESCHEDULE_ADAPTIVE Enable adaptive pre-schedule across the event device or a given event port. Delay issuing pre-schedule until there are no forward progress constraints with the held flow contexts. rte_event_dev_con- fig::preschedule_type rte_event_port_preschedule_modify() See also RTE_EVENT_DEV_CAP_EVENT_PRESCHEDULE_ADAPTIVE RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE Definition at line 743 of file rte_eventdev.h. enum rte_event_dev_xstats_mode Selects the component of the eventdev to retrieve statistics from. Definition at line 2402 of file rte_eventdev.h. Function Documentation uint8_t rte_event_dev_count (void) Get the total number of event devices. Returns The total number of usable event devices. int rte_event_dev_get_dev_id (const char * name) Get the device identifier for the named event device. Parameters name Event device name to select the event device identifier. Returns Event device identifier (dev_id >= 0) on success. Negative error code on failure: * -EINVAL - input name parameter is invalid. * -ENODEV - no event device found with that name. int rte_event_dev_socket_id (uint8_t dev_id) Return the NUMA socket to which a device is connected. Parameters dev_id The identifier of the device. Returns The NUMA socket id to which the device is connected or a default of zero if the socket could not be determined. -EINVAL on error, where the given dev_id value does not correspond to any event device. int rte_event_dev_info_get (uint8_t dev_id, struct rte_event_dev_info * dev_info) Retrieve details of an event device's capabilities and configuration lim- its. Parameters dev_id The identifier of the device. dev_info A pointer to a structure of type rte_event_dev_info to be filled with the information about the device's capabilities. Returns * 0: Success, information about the event device is present in dev_info. * <0: Failure, error code returned by the function. * -EINVAL - invalid input parameters, e.g. incorrect device id. * -ENOTSUP - device does not support returning capabilities informa- tion. int rte_event_dev_attr_get (uint8_t dev_id, uint32_t attr_id, uint32_t * attr_value) Get an attribute from a device. Parameters dev_id Eventdev id attr_id The attribute ID to retrieve attr_value A pointer that will be filled in with the attribute value if successful. Returns * 0: Successfully retrieved attribute value * -EINVAL: Invalid device or attr_id provided, or attr_value is NULL int rte_event_dev_configure (uint8_t dev_id, const struct rte_event_dev_con- fig * dev_conf) Configure an event device. This function must be invoked before any other configuration function in the API, when preparing an event device for application use. This function can also be re-invoked when a device is in the stopped state. The caller should use rte_event_dev_info_get() to get the capabilities and resource limits for this event device before calling this API. Many values in the dev_conf input parameter are subject to limits given in the device information returned from rte_event_dev_info_get(). Parameters dev_id The identifier of the device to configure. dev_conf The event device configuration structure. Returns * 0: Success, device configured. * <0: Error code returned by the driver configuration function. * -ENOTSUP - device does not support configuration. * -EINVAL - invalid input parameter. * -EBUSY - device has already been started. int rte_event_queue_default_conf_get (uint8_t dev_id, uint8_t queue_id, struct rte_event_queue_conf * queue_conf) Retrieve the default configuration information of an event queue designated by its queue_id from the event driver for an event device. This function intended to be used in conjunction with rte_event_queue_setup() where caller needs to set up the queue by overrid- ing few default values. Parameters dev_id The identifier of the device. queue_id The index of the event queue to get the configuration informa- tion. The value must be less than rte_event_dev_config::nb_event_queues previously supplied to rte_event_dev_configure(). queue_conf The pointer to the default event queue configuration data. Returns * 0: Success, driver updates the default event queue configuration data. * <0: Error code returned by the driver info get function. See also rte_event_queue_setup() int rte_event_queue_setup (uint8_t dev_id, uint8_t queue_id, const struct rte_event_queue_conf * queue_conf) Allocate and set up an event queue for an event device. Parameters dev_id The identifier of the device. queue_id The index of the event queue to setup. The value must be less than rte_event_dev_config::nb_event_queues previously supplied to rte_event_dev_configure(). queue_conf The pointer to the configuration data to be used for the event queue. NULL value is allowed, in which case default configuration used. See also rte_event_queue_default_conf_get() Returns * 0: Success, event queue correctly set up. * <0: event queue configuration failed. int rte_event_queue_attr_get (uint8_t dev_id, uint8_t queue_id, uint32_t attr_id, uint32_t * attr_value) Get an attribute of an event queue. Parameters dev_id The identifier of the device. queue_id The index of the event queue to query. The value must be less than rte_event_dev_config::nb_event_queues previously supplied to rte_event_dev_configure(). attr_id The attribute ID to retrieve (RTE_EVENT_QUEUE_ATTR_*). attr_value A pointer that will be filled in with the attribute value if successful. Returns * 0: Successfully returned value * -EINVAL: invalid device, queue or attr_id provided, or attr_value was NULL. * -EOVERFLOW: returned when attr_id is set to RTE_EVENT_QUEUE_ATTR_SCHEDULE_TYPE and RTE_EVENT_QUEUE_CFG_ALL_TYPES is set in the queue configuration flags. int rte_event_queue_attr_set (uint8_t dev_id, uint8_t queue_id, uint32_t attr_id, uint64_t attr_value) Set an event queue attribute. Parameters dev_id The identifier of the device. queue_id The index of the event queue to configure. The value must be less than rte_event_dev_config::nb_event_queues previously supplied to rte_event_dev_configure(). attr_id The attribute ID to set (RTE_EVENT_QUEUE_ATTR_*). attr_value The attribute value to set. Returns * 0: Successfully set attribute. * <0: failed to set event queue attribute. * -EINVAL: invalid device, queue or attr_id. * -ENOTSUP: device does not support setting the event attribute. int rte_event_port_default_conf_get (uint8_t dev_id, uint8_t port_id, struct rte_event_port_conf * port_conf) Retrieve the default configuration information of an event port designated by its port_id from the event driver for an event device. This function is intended to be used in conjunction with rte_event_port_setup() where the caller can set up the port by just over- riding few default values. Parameters dev_id The identifier of the device. port_id The index of the event port to get the configuration informa- tion. The value must be less than rte_event_dev_config::nb_event_ports previously supplied to rte_event_dev_configure(). port_conf The pointer to a structure to store the default event port configuration data. Returns * 0: Success, driver updates the default event port configuration data. * <0: Error code returned by the driver info get function. * -EINVAL - invalid input parameter. * -ENOTSUP - function is not supported for this device. See also rte_event_port_setup() int rte_event_port_setup (uint8_t dev_id, uint8_t port_id, const struct rte_event_port_conf * port_conf) Allocate and set up an event port for an event device. Parameters dev_id The identifier of the device. port_id The index of the event port to setup. The value must be less than rte_event_dev_config::nb_event_ports previously supplied to rte_event_dev_configure(). port_conf The pointer to the configuration data to be used for the port. NULL value is allowed, in which case the default configuration is used. See also rte_event_port_default_conf_get() Returns * 0: Success, event port correctly set up. * <0: Port configuration failed. * -EINVAL - Invalid input parameter. * -EBUSY - Port already started. * -ENOTSUP - Function not supported on this device, or a NULL pointer passed as the port_conf parameter, and no default configuration function available for this device. * -EDQUOT - Application tried to link a queue configured with RTE_EVENT_QUEUE_CFG_SINGLE_LINK to more than one event port. void rte_event_port_quiesce (uint8_t dev_id, uint8_t port_id, rte_event- dev_port_flush_t release_cb, void * args) Quiesce any core specific resources consumed by the event port. Event ports are generally coupled with lcores, and a given Hardware imple- mentation might require the PMD to store port specific data in the lcore. When the application decides to migrate the event port to another lcore or teardown the current lcore it may to call rte_event_port_quiesce to make sure that all the data associated with the event port are released from the lcore, this might also include any prefetched events. While releasing the event port from the lcore, this function calls the user-provided flush callback once per event. Note Invocation of this API does not affect the existing port configuration. Parameters dev_id The identifier of the device. port_id The index of the event port to quiesce. The value must be less than rte_event_dev_config::nb_event_ports previously supplied to rte_event_dev_configure(). release_cb Callback function invoked once per flushed event. args Argument supplied to callback. int rte_event_port_attr_get (uint8_t dev_id, uint8_t port_id, uint32_t attr_id, uint32_t * attr_value) Get an attribute from a port. Parameters dev_id The identifier of the device. port_id The index of the event port to query. The value must be less than rte_event_dev_config::nb_event_ports previously supplied to rte_event_dev_configure(). attr_id The attribute ID to retrieve (RTE_EVENT_PORT_ATTR_*) attr_value A pointer that will be filled in with the attribute value if successful Returns * 0: Successfully returned value. * (-EINVAL) Invalid device, port or attr_id, or attr_value was NULL. int rte_event_dev_start (uint8_t dev_id) Start an event device. The device start step is the last one in device setup, and enables the event ports and queues to start accepting events and scheduling them to event ports. On success, all basic functions exported by the API (event enqueue, event dequeue and so on) can be invoked. Parameters dev_id Event device identifier. Returns * 0: Success, device started. * -EINVAL: Invalid device id provided. * -ENOTSUP: Device does not support this operation. * -ESTALE : Not all ports of the device are configured. * -ENOLINK: Not all queues are linked, which could lead to deadlock. void rte_event_dev_stop (uint8_t dev_id) Stop an event device. This function causes all queued events to be drained, including those re- siding in event ports. While draining events out of the device, this func- tion calls the user-provided flush callback (if one was registered) once per event. The device can be restarted with a call to rte_event_dev_start(). Threads that continue to enqueue/dequeue while the device is stopped, or being stopped, will result in undefined behavior. This includes event adapters, which must be stopped prior to stopping the eventdev. Parameters dev_id Event device identifier. See also rte_event_dev_stop_flush_callback_register() int rte_event_dev_stop_flush_callback_register (uint8_t dev_id, rte_event- dev_stop_flush_t callback, void * userdata) Registers a callback function to be invoked during rte_event_dev_stop() for each flushed event. This function can be used to properly dispose of queued events, for example events containing memory pointers. The callback function is only registered for the calling process. The call- back function must be registered in every process that can call rte_event_dev_stop(). Only one callback function may be registered. Each new call replaces the existing registered callback function with the new function passed in. To unregister a callback, call this function with a NULL callback pointer. Parameters dev_id The identifier of the device. callback Callback function to be invoked once per flushed event. Pass NULL to unset any previously-registered callback function. userdata Argument supplied to callback. Returns * 0 on success. * -EINVAL if dev_id is invalid. See also rte_event_dev_stop() int rte_event_dev_close (uint8_t dev_id) Close an event device. The device cannot be restarted! Parameters dev_id Event device identifier. Returns * 0 on successfully closing device * <0 on failure to close device. * -EINVAL - invalid device id. * -ENOTSUP - operation not supported for this device. * -EAGAIN - device is busy. struct __rte_aligned (16) Event vector structure. < Number of elements valid in this event vector. < Offset into the vector array where valid elements start from. < Reserved for future use < Indicates that the below union attributes have valid information. < Ethernet device port id. < Ethernet device queue id. < Union to hold common attributes of the vector array. < Implementation specific opaque value. An implementation may use this field to hold implementation specific value to share between dequeue and enqueue operation. The application should not modify this field. < Start of the vector array union. Depending upon the event type the vector array can be an array of mbufs or pointers or opaque u64 values. Definition at line 1441 of file rte_eventdev.h. int rte_event_eth_rx_adapter_caps_get (uint8_t dev_id, uint16_t eth_port_id, uint32_t * caps) Retrieve the event device's ethdev Rx adapter capabilities for the speci- fied ethernet port Parameters dev_id The identifier of the device. eth_port_id The identifier of the ethernet device. caps A pointer to memory filled with Rx event adapter capabilities. Returns * 0: Success, driver provides Rx event adapter capabilities for the ethernet device. * <0: Error code returned by the driver function. int rte_event_timer_adapter_caps_get (uint8_t dev_id, uint32_t * caps) Retrieve the event device's timer adapter capabilities. Parameters dev_id The identifier of the device. caps A pointer to memory to be filled with event timer adapter capabil- ities. Returns * 0: Success, driver provided event timer adapter capabilities. * <0: Error code returned by the driver function. int rte_event_crypto_adapter_caps_get (uint8_t dev_id, uint8_t cdev_id, uint32_t * caps) Retrieve the event device's crypto adapter capabilities for the specified cryptodev device Parameters dev_id The identifier of the device. cdev_id The identifier of the cryptodev device. caps A pointer to memory filled with event adapter capabilities. It is expected to be pre-allocated & initialized by caller. Returns * 0: Success, driver provides event adapter capabilities for the cryp- todev device. * <0: Error code returned by the driver function. __rte_experimental int rte_event_dma_adapter_caps_get (uint8_t dev_id, uint8_t dmadev_id, uint32_t * caps) Retrieve the event device's DMA adapter capabilities for the specified dmadev device Parameters dev_id The identifier of the device. dmadev_id The identifier of the dmadev device. caps A pointer to memory filled with event adapter capabilities. It is expected to be pre-allocated & initialized by caller. Returns * 0: Success, driver provides event adapter capabilities for the dmadev device. * <0: Error code returned by the driver function. int rte_event_eth_tx_adapter_caps_get (uint8_t dev_id, uint16_t eth_port_id, uint32_t * caps) Retrieve the event device's eth Tx adapter capabilities Parameters dev_id The identifier of the device. eth_port_id The identifier of the ethernet device. caps A pointer to memory filled with eth Tx adapter capabilities. Returns * 0: Success, driver provides eth Tx adapter capabilities. * <0: Error code returned by the driver function. int rte_event_dequeue_timeout_ticks (uint8_t dev_id, uint64_t ns, uint64_t * timeout_ticks) Converts nanoseconds to timeout_ticks value for rte_event_dequeue_burst() If the device is configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT flag then application can use this function to convert timeout value in nanosec- onds to implementations specific timeout value supplied in rte_event_de- queue_burst() Parameters dev_id The identifier of the device. ns Wait time in nanosecond timeout_ticks Value for the timeout_ticks parameter in rte_event_de- queue_burst() Returns * 0 on success. * -ENOTSUP if the device doesn't support timeouts * -EINVAL if dev_id is invalid or timeout_ticks is NULL * other values < 0 on failure. See also rte_event_dequeue_burst(), RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT rte_event_dev_configure() int rte_event_port_link (uint8_t dev_id, uint8_t port_id, const uint8_t queues[], const uint8_t priorities[], uint16_t nb_links) Link multiple source event queues supplied in queues to the destination event port designated by its port_id with associated service priority sup- plied in priorities on the event device designated by its dev_id. The link establishment shall enable the event port port_id from receiving events from the specified event queue(s) supplied in queues An event queue may link to one or more event ports. The number of links can be established from an event queue to event port is implementation defined. Event queue(s) to event port link establishment can be changed at runtime without re-configuring the device to support scaling and to reduce the la- tency of critical work by establishing the link with more event ports at runtime. When the value of rte_event_dev_info::max_profiles_per_port is greater than or equal to one, this function links the event queues to the default pro- file_id i.e. profile_id 0 of the event port. Parameters dev_id The identifier of the device. port_id Event port identifier to select the destination port to link. queues Points to an array of nb_links event queues to be linked to the event port. NULL value is allowed, in which case this function links all the configured event queues nb_event_queues which previously sup- plied to rte_event_dev_configure() to the event port port_id priorities Points to an array of nb_links service priorities associated with each event queue link to event port. The priority defines the event port's servicing priority for event queue, which may be ignored by an implementation. The requested priority should in the range of [RTE_EVENT_DEV_PRIORITY_HIGHEST, RTE_EVENT_DEV_PRIORITY_LOWEST]. The implementation shall normalize the requested priority to implementation supported priority value. NULL value is allowed, in which case this function links the event queues with RTE_EVENT_DEV_PRIORITY_NORMAL ser- vicing priority nb_links The number of links to establish. This parameter is ignored if queues is NULL. Returns The number of links actually established. The return value can be less than the value of the nb_links parameter when the implementation has the limitation on specific queue to port link establishment or if in- valid parameters are specified in queues If the return value is less than nb_links, the remaining links at the end of link[] are not estab- lished, and the caller has to take care of them. If return value is less than nb_links then implementation shall update the rte_errno ac- cordingly, Possible rte_errno values are (EDQUOT) Quota exceeded(Appli- cation tried to link the queue configured with RTE_EVENT_QUEUE_CFG_SINGLE_LINK to more than one event ports) (EINVAL) Invalid parameter int rte_event_port_unlink (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint16_t nb_unlinks) Unlink multiple source event queues supplied in queues from the destination event port designated by its port_id on the event device designated by its dev_id. The unlink call issues an async request to disable the event port port_id from receiving events from the specified event queue queue_id. Event queue(s) to event port unlink establishment can be changed at runtime with- out re-configuring the device. When the value of rte_event_dev_info::max_profiles_per_port is greater than or equal to one, this function unlinks the event queues from the default profile identifier i.e. profile 0 of the event port. See also rte_event_port_unlinks_in_progress() to poll for completed unlinks. Parameters dev_id The identifier of the device. port_id Event port identifier to select the destination port to unlink. queues Points to an array of nb_unlinks event queues to be unlinked from the event port. NULL value is allowed, in which case this function unlinks all the event queue(s) from the event port port_id. nb_unlinks The number of unlinks to establish. This parameter is ig- nored if queues is NULL. Returns The number of unlinks successfully requested. The return value can be less than the value of the nb_unlinks parameter when the implementation has the limitation on specific queue to port unlink establishment or if invalid parameters are specified. If the return value is less than nb_unlinks, the remaining queues at the end of queues[] are not un- linked, and the caller has to take care of them. If return value is less than nb_unlinks then implementation shall update the rte_errno ac- cordingly, Possible rte_errno values are (EINVAL) Invalid parameter __rte_experimental int rte_event_port_profile_links_set (uint8_t dev_id, uint8_t port_id, const uint8_t queues[], const uint8_t priorities[], uint16_t nb_links, uint8_t profile_id) Link multiple source event queues supplied in queues to the destination event port designated by its port_id with associated profile identifier supplied in profile_id with service priorities supplied in priorities on the event device designated by its dev_id. If profile_id is set to 0 then, the links created by the call rte_event_port_link will be overwritten. Event ports by default use profile_id 0 unless it is changed using the call rte_event_port_profile_switch(). The link establishment shall enable the event port port_id from receiving events from the specified event queue(s) supplied in queues An event queue may link to one or more event ports. The number of links can be established from an event queue to event port is implementation defined. Event queue(s) to event port link establishment can be changed at runtime without re-configuring the device to support scaling and to reduce the la- tency of critical work by establishing the link with more event ports at runtime. Parameters dev_id The identifier of the device. port_id Event port identifier to select the destination port to link. queues Points to an array of nb_links event queues to be linked to the event port. NULL value is allowed, in which case this function links all the configured event queues nb_event_queues which previously sup- plied to rte_event_dev_configure() to the event port port_id priorities Points to an array of nb_links service priorities associated with each event queue link to event port. The priority defines the event port's servicing priority for event queue, which may be ignored by an implementation. The requested priority should in the range of [RTE_EVENT_DEV_PRIORITY_HIGHEST, RTE_EVENT_DEV_PRIORITY_LOWEST]. The implementation shall normalize the requested priority to implementation supported priority value. NULL value is allowed, in which case this function links the event queues with RTE_EVENT_DEV_PRIORITY_NORMAL ser- vicing priority nb_links The number of links to establish. This parameter is ignored if queues is NULL. profile_id The profile identifier associated with the links between event queues and event port. Should be less than the max capability re- ported by rte_event_dev_info::max_profiles_per_port Returns The number of links actually established. The return value can be less than the value of the nb_links parameter when the implementation has the limitation on specific queue to port link establishment or if in- valid parameters are specified in queues If the return value is less than nb_links, the remaining links at the end of link[] are not estab- lished, and the caller has to take care of them. If return value is less than nb_links then implementation shall update the rte_errno ac- cordingly, Possible rte_errno values are (EDQUOT) Quota exceeded(Appli- cation tried to link the queue configured with RTE_EVENT_QUEUE_CFG_SINGLE_LINK to more than one event ports) (EINVAL) Invalid parameter __rte_experimental int rte_event_port_profile_unlink (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint16_t nb_unlinks, uint8_t profile_id) Unlink multiple source event queues supplied in queues that belong to pro- file designated by profile_id from the destination event port designated by its port_id on the event device designated by its dev_id. If profile_id is set to 0 i.e., the default profile then, then this func- tion will act as rte_event_port_unlink. The unlink call issues an async request to disable the event port port_id from receiving events from the specified event queue queue_id. Event queue(s) to event port unlink establishment can be changed at runtime with- out re-configuring the device. See also rte_event_port_unlinks_in_progress() to poll for completed unlinks. Parameters dev_id The identifier of the device. port_id Event port identifier to select the destination port to unlink. queues Points to an array of nb_unlinks event queues to be unlinked from the event port. NULL value is allowed, in which case this function unlinks all the event queue(s) from the event port port_id. nb_unlinks The number of unlinks to establish. This parameter is ig- nored if queues is NULL. profile_id The profile identifier associated with the links between event queues and event port. Should be less than the max capability re- ported by rte_event_dev_info::max_profiles_per_port Returns The number of unlinks successfully requested. The return value can be less than the value of the nb_unlinks parameter when the implementation has the limitation on specific queue to port unlink establishment or if invalid parameters are specified. If the return value is less than nb_unlinks, the remaining queues at the end of queues[] are not un- linked, and the caller has to take care of them. If return value is less than nb_unlinks then implementation shall update the rte_errno ac- cordingly, Possible rte_errno values are (EINVAL) Invalid parameter int rte_event_port_unlinks_in_progress (uint8_t dev_id, uint8_t port_id) Returns the number of unlinks in progress. This function provides the application with a method to detect when an un- link has been completed by the implementation. See also rte_event_port_unlink() to issue unlink requests. Parameters dev_id The identifier of the device. port_id Event port identifier to select port to check for unlinks in progress. Returns The number of unlinks that are in progress. A return of zero indicates that there are no outstanding unlink requests. A positive return value indicates the number of unlinks that are in progress, but are not yet complete. A negative return value indicates an error, -EINVAL indicates an invalid parameter passed for dev_id or port_id. int rte_event_port_links_get (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint8_t priorities[]) Retrieve the list of source event queues and its associated service prior- ity linked to the destination event port designated by its port_id on the event device designated by its dev_id. Parameters dev_id The identifier of the device. port_id Event port identifier. queues Points to an array of queues for output. The caller has to allo- cate RTE_EVENT_MAX_QUEUES_PER_DEV bytes to store the event queue(s) linked with event port port_id priorities Points to an array of priorities for output. The caller has to allocate RTE_EVENT_MAX_QUEUES_PER_DEV bytes to store the service priority associated with each event queue linked Returns The number of links established on the event port designated by its port_id. * <0 on failure. __rte_experimental int rte_event_port_profile_links_get (uint8_t dev_id, uint8_t port_id, uint8_t queues[], uint8_t priorities[], uint8_t pro- file_id) Retrieve the list of source event queues and its service priority associ- ated to a profile_id and linked to the destination event port designated by its port_id on the event device designated by its dev_id. Parameters dev_id The identifier of the device. port_id Event port identifier. queues Points to an array of queues for output. The caller has to allo- cate RTE_EVENT_MAX_QUEUES_PER_DEV bytes to store the event queue(s) linked with event port port_id priorities Points to an array of priorities for output. The caller has to allocate RTE_EVENT_MAX_QUEUES_PER_DEV bytes to store the service priority associated with each event queue linked profile_id The profile identifier associated with the links between event queues and event port. Should be less than the max capability re- ported by rte_event_dev_info::max_profiles_per_port Returns The number of links established on the event port designated by its port_id. * <0 on failure. int rte_event_dev_service_id_get (uint8_t dev_id, uint32_t * service_id) Retrieve the service ID of the event dev. If the adapter doesn't use a rte_service function, this function returns -ESRCH. Parameters dev_id The identifier of the device. service_id A pointer to a uint32_t, to be filled in with the service id. Returns * 0: Success * <0: Error code on failure, if the event dev doesn't use a rte_service function, this function returns -ESRCH. int rte_event_dev_dump (uint8_t dev_id, FILE * f) Dump internal information about dev_id to the FILE* provided in f. Parameters dev_id The identifier of the device. f A pointer to a file for output Returns * 0: on success * <0: on failure. int rte_event_dev_xstats_names_get (uint8_t dev_id, enum rte_event_dev_xs- tats_mode mode, uint8_t queue_port_id, struct rte_event_dev_xstats_name * xstats_names, uint64_t * ids, unsigned int size) Retrieve names of extended statistics of an event device. Parameters dev_id The identifier of the event device. mode The mode of statistics to retrieve. Choices include the device statistics, port statistics or queue statistics. queue_port_id Used to specify the port or queue number in queue or port mode, and is ignored in device mode. xstats_names Block of memory to insert names into. Must be at least size in capacity. If set to NULL, function returns required capacity. ids Block of memory to insert ids into. Must be at least size in capac- ity. If set to NULL, function returns required capacity. The id values returned can be passed to rte_event_dev_xstats_get to select statis- tics. size Capacity of xstats_names (number of names). Returns * positive value lower or equal to size: success. The return value is the number of entries filled in the stats table. * positive value higher than size: error, the given statistics table is too small. The return value corresponds to the size that should be given to succeed. The entries in the table are not valid and shall not be used by the caller. * negative value on error: -ENODEV for invalid dev_id -EINVAL for in- valid mode, queue port or id parameters -ENOTSUP if the device doesn't support this function. int rte_event_dev_xstats_get (uint8_t dev_id, enum rte_event_dev_xstats_mode mode, uint8_t queue_port_id, const uint64_t ids[], uint64_t values[], un- signed int n) Retrieve extended statistics of an event device. Parameters dev_id The identifier of the device. mode The mode of statistics to retrieve. Choices include the device statistics, port statistics or queue statistics. queue_port_id Used to specify the port or queue number in queue or port mode, and is ignored in device mode. ids The id numbers of the stats to get. The ids can be got from the stat position in the stat list from rte_event_dev_get_xstats_names(), or by using rte_event_dev_xstats_by_name_get(). values The values for each stats request by ID. n The number of stats requested Returns * positive value: number of stat entries filled into the values array * negative value on error: -ENODEV for invalid dev_id -EINVAL for in- valid mode, queue port or id parameters -ENOTSUP if the device doesn't support this function. uint64_t rte_event_dev_xstats_by_name_get (uint8_t dev_id, const char * name, uint64_t * id) Retrieve the value of a single stat by requesting it by name. Parameters dev_id The identifier of the device name The stat name to retrieve id If non-NULL, the numerical id of the stat will be returned, so that further requests for the stat can be got using rte_event_dev_xs- tats_get, which will be faster as it doesn't need to scan a list of names for the stat. If the stat cannot be found, the id returned will be (unsigned)-1. Returns * positive value or zero: the stat value * negative value: -EINVAL if stat not found, -ENOTSUP if not supported. int rte_event_dev_xstats_reset (uint8_t dev_id, enum rte_event_dev_xs- tats_mode mode, int16_t queue_port_id, const uint64_t ids[], uint32_t nb_ids) Reset the values of the xstats of the selected component in the device. Parameters dev_id The identifier of the device mode The mode of the statistics to reset. Choose from device, queue or port. queue_port_id The queue or port to reset. 0 and positive values select ports and queues, while -1 indicates all ports or queues. ids Selects specific statistics to be reset. When NULL, all statistics selected by mode will be reset. If non-NULL, must point to array of at least nb_ids size. nb_ids The number of ids available from the ids array. Ignored when ids is NULL. Returns * zero: successfully reset the statistics to zero * negative value: -EINVAL invalid parameters, -ENOTSUP if not sup- ported. int rte_event_dev_selftest (uint8_t dev_id) Trigger the eventdev self test. Parameters dev_id The identifier of the device Returns * 0: Selftest successful * -ENOTSUP if the device doesn't support selftest * other values < 0 on failure. struct rte_mempool * rte_event_vector_pool_create (const char * name, un- signed int n, unsigned int cache_size, uint16_t nb_elem, int socket_id) Get the memory required per event vector based on the number of elements per vector. This should be used to create the mempool that holds the event vectors. Parameters name The name of the vector pool. n The number of elements in the mbuf pool. cache_size Size of the per-core object cache. See rte_mempool_create() for details. nb_elem The number of elements that a single event vector should be able to hold. socket_id The socket identifier where the memory should be allocated. The value can be SOCKET_ID_ANY if there is no NUMA constraint for the reserved zone Returns The pointer to the newly allocated mempool, on success. NULL on error with rte_errno set appropriately. Possible rte_errno values include: * E_RTE_NO_CONFIG - function could not get pointer to rte_config struc- ture * E_RTE_SECONDARY - function was called from a secondary process in- stance * EINVAL - cache size provided is too large, or priv_size is not aligned. * ENOSPC - the maximum number of memzones has already been allocated * EEXIST - a memzone with the same name already exists * ENOMEM - no appropriate memory area found in which to create memzone * ENAMETOOLONG - mempool name requested is too long. static uint16_t rte_event_enqueue_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) [inline], [static] Enqueue a burst of events objects or an event object supplied in rte_event structure on an event device designated by its dev_id through the event port specified by port_id. Each event object specifies the event queue on which it will be enqueued. The nb_events parameter is the number of event objects to enqueue which are supplied in the ev array of rte_event structure. Event operations RTE_EVENT_OP_FORWARD and RTE_EVENT_OP_RELEASE must only be enqueued to the same port that their associated events were dequeued from. The rte_event_enqueue_burst() function returns the number of events objects it actually enqueued. A return value equal to nb_events means that all event objects have been enqueued. Parameters dev_id The identifier of the device. port_id The identifier of the event port. ev Points to an array of nb_events objects of type rte_event structure which contain the event object enqueue operations to be processed. nb_events The number of event objects to enqueue, typically number of rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) available for this port. Returns The number of event objects actually enqueued on the event device. The return value can be less than the value of the nb_events parameter when the event devices queue is full or if invalid parameters are specified in a rte_event. If the return value is less than nb_events, the remain- ing events at the end of ev[] are not consumed and the caller has to take care of them, and rte_errno is set accordingly. Possible errno values include: * EINVAL The port ID is invalid, device ID is invalid, an event's queue ID is invalid, or an event's sched type doesn't match the capabili- ties of the destination queue. * ENOSPC The event port was backpressured and unable to enqueue one or more events. This error code is only applicable to closed systems. See also rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH Definition at line 2662 of file rte_eventdev.h. static uint16_t rte_event_enqueue_new_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) [inline], [static] Enqueue a burst of events objects of operation type RTE_EVENT_OP_NEW on an event device designated by its dev_id through the event port specified by port_id. Provides the same functionality as rte_event_enqueue_burst(), expect that application can use this API when the all objects in the burst contains the enqueue operation of the type RTE_EVENT_OP_NEW. This specialized function can provide the additional hint to the PMD and optimize if possible. The rte_event_enqueue_new_burst() result is undefined if the enqueue burst has event object of operation type != RTE_EVENT_OP_NEW. Parameters dev_id The identifier of the device. port_id The identifier of the event port. ev Points to an array of nb_events objects of type rte_event structure which contain the event object enqueue operations to be processed. nb_events The number of event objects to enqueue, typically number of rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) available for this port. Returns The number of event objects actually enqueued on the event device. The return value can be less than the value of the nb_events parameter when the event devices queue is full or if invalid parameters are specified in a rte_event. If the return value is less than nb_events, the remain- ing events at the end of ev[] are not consumed and the caller has to take care of them, and rte_errno is set accordingly. Possible errno values include: * EINVAL The port ID is invalid, device ID is invalid, an event's queue ID is invalid, or an event's sched type doesn't match the capabili- ties of the destination queue. * ENOSPC The event port was backpressured and unable to enqueue one or more events. This error code is only applicable to closed systems. See also rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH rte_event_enqueue_burst() Definition at line 2714 of file rte_eventdev.h. static uint16_t rte_event_enqueue_forward_burst (uint8_t dev_id, uint8_t port_id, const struct rte_event ev[], uint16_t nb_events) [inline], [sta- tic] Enqueue a burst of events objects of operation type RTE_EVENT_OP_FORWARD on an event device designated by its dev_id through the event port specified by port_id. Provides the same functionality as rte_event_enqueue_burst(), expect that application can use this API when the all objects in the burst contains the enqueue operation of the type RTE_EVENT_OP_FORWARD. This specialized func- tion can provide the additional hint to the PMD and optimize if possible. The rte_event_enqueue_new_burst() result is undefined if the enqueue burst has event object of operation type != RTE_EVENT_OP_FORWARD. Parameters dev_id The identifier of the device. port_id The identifier of the event port. ev Points to an array of nb_events objects of type rte_event structure which contain the event object enqueue operations to be processed. nb_events The number of event objects to enqueue, typically number of rte_event_port_attr_get(...RTE_EVENT_PORT_ATTR_ENQ_DEPTH...) available for this port. Returns The number of event objects actually enqueued on the event device. The return value can be less than the value of the nb_events parameter when the event devices queue is full or if invalid parameters are specified in a rte_event. If the return value is less than nb_events, the remain- ing events at the end of ev[] are not consumed and the caller has to take care of them, and rte_errno is set accordingly. Possible errno values include: * EINVAL The port ID is invalid, device ID is invalid, an event's queue ID is invalid, or an event's sched type doesn't match the capabili- ties of the destination queue. * ENOSPC The event port was backpressured and unable to enqueue one or more events. This error code is only applicable to closed systems. See also rte_event_port_attr_get(), RTE_EVENT_PORT_ATTR_ENQ_DEPTH rte_event_enqueue_burst() Definition at line 2766 of file rte_eventdev.h. static uint16_t rte_event_dequeue_burst (uint8_t dev_id, uint8_t port_id, struct rte_event ev[], uint16_t nb_events, uint64_t timeout_ticks) [in- line], [static] Dequeue a burst of events objects or an event object from the event port designated by its event_port_id, on an event device designated by its dev_id. rte_event_dequeue_burst() does not dictate the specifics of scheduling al- gorithm as each eventdev driver may have different criteria to schedule an event. However, in general, from an application perspective scheduler may use the following scheme to dispatch an event to the port. 1) Selection of event queue based on a) The list of event queues are linked to the event port. b) If the device has RTE_EVENT_DEV_CAP_QUEUE_QOS capa- bility then event queue selection from list is based on event queue prior- ity relative to other event queue supplied as priority in rte_event_queue_setup() c) If the device has RTE_EVENT_DEV_CAP_EVENT_QOS capability then event queue selection from the list is based on event pri- ority supplied as priority in rte_event_enqueue_burst() 2) Selection of event a) The number of flows available in selected event queue. b) Schedule type method associated with the event The nb_events parameter is the maximum number of event objects to dequeue which are returned in the ev array of rte_event structure. The rte_event_dequeue_burst() function returns the number of events objects it actually dequeued. A return value equal to nb_events means that all event objects have been dequeued. The number of events dequeued is the number of scheduler contexts held by this port. These contexts are automatically released in the next rte_event_dequeue_burst() invocation if the port supports implicit re- leases, or invoking rte_event_enqueue_burst() with RTE_EVENT_OP_RELEASE op- eration can be used to release the contexts early. Event operations RTE_EVENT_OP_FORWARD and RTE_EVENT_OP_RELEASE must only be enqueued to the same port that their associated events were dequeued from. Parameters dev_id The identifier of the device. port_id The identifier of the event port. ev Points to an array of nb_events objects of type rte_event structure for output to be populated with the dequeued event objects. nb_events The maximum number of event objects to dequeue, typically number of rte_event_port_dequeue_depth() available for this port. timeout_ticks * 0 no-wait, returns immediately if there is no event. * >0 wait for the event, if the device is configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT then this function will wait until at least one event is available or timeout_ticks time. if the device is not configured with RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT then this function will wait until the event available or de- queue_timeout_ns ns which was previously supplied to rte_event_dev_configure() Returns The number of event objects actually dequeued from the port. The return value can be less than the value of the nb_events parameter when the event port's queue is not full. See also rte_event_port_dequeue_depth() Definition at line 2843 of file rte_eventdev.h. static int rte_event_maintain (uint8_t dev_id, uint8_t port_id, int op) [in- line], [static] Maintain an event device. This function is only relevant for event devices which do not have the RTE_EVENT_DEV_CAP_MAINTENANCE_FREE flag set. Such devices require an appli- cation thread using a particular port to periodically call rte_event_main- tain() on that port during periods which it is neither attempting to en- queue events to nor dequeue events from the port. rte_event_maintain() is a low-overhead function and should be called at a high rate (e.g., in the ap- plication's poll loop). No port may be left unmaintained. At the application thread's convenience, rte_event_maintain() may (but is not required to) be called even during periods when enqueue or dequeue functions are being called, at the cost of a slight increase in overhead. rte_event_maintain() may be called on event devices which have set RTE_EVENT_DEV_CAP_MAINTENANCE_FREE, in which case it is a no-operation. Parameters dev_id The identifier of the device. port_id The identifier of the event port. op 0, or RTE_EVENT_DEV_MAINT_OP_FLUSH. Returns * 0 on success. * -EINVAL if dev_id, port_id, or op is invalid. See also RTE_EVENT_DEV_CAP_MAINTENANCE_FREE Definition at line 2911 of file rte_eventdev.h. static uint8_t rte_event_port_profile_switch (uint8_t dev_id, uint8_t port_id, uint8_t profile_id) [inline], [static] Change the active profile on an event port. This function is used to change the current active profile on an event port when multiple link profiles are configured on an event port through the function call rte_event_port_profile_links_set. On the subsequent rte_event_dequeue_burst call, only the event queues that were associated with the newly active profile will participate in schedul- ing. Parameters dev_id The identifier of the device. port_id The identifier of the event port. profile_id The identifier of the profile. Returns * 0 on success. * -EINVAL if dev_id, port_id, or profile_id is invalid. Definition at line 2959 of file rte_eventdev.h. static __rte_experimental int rte_event_port_preschedule_modify (uint8_t dev_id, uint8_t port_id, enum rte_event_dev_preschedule_type type) [in- line], [static] Modify the pre-schedule type to use on an event port. This function is used to change the current pre-schedule type configured on an event port, the pre-schedule type can be set to none to disable pre- scheduling. This effects the subsequent rte_event_dequeue_burst call. The event device should support RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE capabil- ity. To avoid fastpath capability checks if an event device does not support RTE_EVENT_DEV_CAP_PER_PORT_PRESCHEDULE capability, then this function will return -ENOTSUP. Parameters dev_id The identifier of the device. port_id The identifier of the event port. type The preschedule type to use on the event port. Returns * 0 on success. * -EINVAL if dev_id, port_id, or type is invalid. * -ENOTSUP if the device does not support per port preschedule capabil- ity. Definition at line 3008 of file rte_eventdev.h. static __rte_experimental void rte_event_port_preschedule (uint8_t dev_id, uint8_t port_id, enum rte_event_dev_preschedule_type type) [inline], [sta- tic] Provide a hint to the event device to pre-schedule events to event port . Hint the event device to pre-schedule events to the event port. The call doesn't not guarantee that the events will be pre-scheduleed. The call doesn't release the flow context currently held by the event port. The event device should support RTE_EVENT_DEV_CAP_PRESCHEDULE_EXPLICIT capabil- ity. When pre-scheduling is enabled at an event device/port level or if the ca- pability is not supported, then the hint is ignored. Subsequent calls to rte_event_dequeue_burst() will dequeue the pre-schedule events but pre-schedule operation is not issued again. Parameters dev_id The identifier of the device. port_id The identifier of the event port. type The pre-schedule type to use on the event port. Definition at line 3052 of file rte_eventdev.h. Author Generated automatically by Doxygen for DPDK from the source code. Version 25.11.0 Thu Aug 27 2026 rte_eventdev.h(3)
NAME | SYNOPSIS | Detailed Description | RTE Event Device API | Macro Definition Documentation | Typedef Documentation | Enumeration Type Documentation | Function Documentation | Author
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