eal: fix build with glibc < 2.16

[dpdk.git] / lib / librte_eventdev / rte_event_eth_rx_adapter.h

diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.h b/lib/librte_eventdev/rte_event_eth_rx_adapter.h
index 6a9e7ed..fc9da14 100644 (file)
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.h
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.h
@@ -47,7 +47,11 @@
  *
  * The adapter uses a EAL service core function for SW based packet transfer
  * and uses the eventdev PMD functions to configure HW based packet transfer
- * between the ethernet device and the event device.
+ * between the ethernet device and the event device. For SW based packet
+ * transfer, if the mbuf does not have a timestamp set, the adapter adds a
+ * timestamp to the mbuf using rte_get_tsc_cycles(), this provides a more
+ * accurate timestamp as compared to if the application were to set the time
+ * stamp since it avoids event device schedule latency.
  *
  * The ethernet Rx event adapter's functions are:
  *  - rte_event_eth_rx_adapter_create_ext()
@@ -321,6 +325,12 @@ int rte_event_eth_rx_adapter_free(uint8_t id);
  * @return
  *  - 0: Success, Receive queue added correctly.
  *  - <0: Error code on failure.
+ *  - (-EIO) device reconfiguration and restart error. The adapter reconfigures
+ *  the event device with an additional port if it is required to use a service
+ *  function for packet transfer from the ethernet device to the event device.
+ *  If the device had been started before this call, this error code indicates
+ *  an error in restart following an error in reconfiguration, i.e., a
+ *  combination of the two error codes.
  */
 int rte_event_eth_rx_adapter_queue_add(uint8_t id,
                        uint8_t eth_dev_id,