if one exists. The service function also maintains a count of cycles for which
it was not able to enqueue to the event device.
+Getting Adapter queue config
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``rte_event_eth_rx_adapter_queue_conf_get()`` function reports
+flags for handling received packets, event queue identifier, scheduler type,
+event priority, polling frequency of the receive queue and flow identifier
+in struct ``rte_event_eth_rx_adapter_queue_conf``.
+
Interrupt Based Rx Queues
~~~~~~~~~~~~~~~~~~~~~~~~~~
``rte_event_eth_rx_adapter_cb_register()`` function allow the application
to register a callback that selects which packets to enqueue to the event
device.
+
+Rx event vectorization
+~~~~~~~~~~~~~~~~~~~~~~
+
+The event devices, ethernet device pairs which support the capability
+``RTE_EVENT_ETH_RX_ADAPTER_CAP_EVENT_VECTOR`` can aggregate packets based on
+flow characteristics and generate a ``rte_event`` containing ``rte_event_vector``
+whose event type is either ``RTE_EVENT_TYPE_ETHDEV_VECTOR`` or
+``RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR``.
+The maximum, minimum vector sizes and timeouts vary based on the device
+capability and can be queried using
+``rte_event_eth_rx_adapter_vector_limits_get``.
+The Rx adapter additionally might include useful data such as ethernet device
+port and queue identifier in the ``rte_event_vector::port`` and
+``rte_event_vector::queue`` and mark ``rte_event_vector::attr_valid`` as true.
+The aggregation size and timeout are configurable at a queue level by setting
+``rte_event_eth_rx_adapter_queue_conf::vector_sz``,
+``rte_event_eth_rx_adapter_queue_conf::vector_timeout_ns`` and
+``rte_event_eth_rx_adapter_queue_conf::vector_mp`` when adding queues using
+``rte_event_eth_rx_adapter_queue_add``.
+
+A loop processing ``rte_event_vector`` containing mbufs is shown below.
+
+.. code-block:: c
+
+ event = rte_event_dequeue_burst(event_dev, event_port, &event,
+ 1, 0);
+ if (!event)
+ continue;
+
+ switch (ev.event_type) {
+ case RTE_EVENT_TYPE_ETH_RX_ADAPTER_VECTOR:
+ case RTE_EVENT_TYPE_ETHDEV_VECTOR:
+ struct rte_mbufs **mbufs;
+
+ mbufs = (struct rte_mbufs **)ev[i].vec->mbufs;
+ for (i = 0; i < ev.vec->nb_elem; i++) {
+ /* Process each mbuf. */
+ }
+ break;
+ case ...
+ ...
+ }
+
+Rx event vectorization for SW Rx adapter
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For SW based event vectorization, i.e., when the
+``RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT`` is not set in the adapter's
+capabilities flags for a particular ethernet device, the service function
+creates a single event vector flow for all the mbufs arriving on the given
+Rx queue.
+The 20-bit event flow identifier is set to 12-bits of Rx queue identifier
+and 8-bits of ethernet device identifier.
+Flow identifier is formatted as follows:
+
+.. code-block:: console
+
+ 19 12,11 0
+ +---------+--------------+
+ | port_id | queue_id |
+ +---------+--------------+