+
+Rx Callback for SW Rx Adapter
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For SW based packet transfers, 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
+temporarily enqueues mbufs to an event buffer before batch enqueuing these
+to the event device. If the buffer fills up, the service function stops
+dequeuing packets from the ethernet device. The application may want to
+monitor the buffer fill level and instruct the service function to selectively
+enqueue packets to the event device. The application may also use some other
+criteria to decide which packets should enter the event device even when
+the event buffer fill level is low. The
+``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.