+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * It registers the callback for the specific device.
+ * Multiple callbacks can be registered at the same time.
+ *
+ * @param device_name
+ * The device name, that is the param name of the struct rte_device,
+ * null value means for all devices.
+ * @param cb_fn
+ * callback address.
+ * @param cb_arg
+ * address of parameter for callback.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_event_callback_register(const char *device_name,
+ rte_dev_event_cb_fn cb_fn,
+ void *cb_arg);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * It unregisters the callback according to the specified device.
+ *
+ * @param device_name
+ * The device name, that is the param name of the struct rte_device,
+ * null value means for all devices and their callbacks.
+ * @param cb_fn
+ * callback address.
+ * @param cb_arg
+ * address of parameter for callback, (void *)-1 means to remove all
+ * registered which has the same callback address.
+ *
+ * @return
+ * - On success, return the number of callback entities removed.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_event_callback_unregister(const char *device_name,
+ rte_dev_event_cb_fn cb_fn,
+ void *cb_arg);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Executes all the user application registered callbacks for
+ * the specific device.
+ *
+ * @param device_name
+ * The device name.
+ * @param event
+ * the device event type.
+ */
+__rte_experimental
+void
+rte_dev_event_callback_process(const char *device_name,
+ enum rte_dev_event_type event);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Start the device event monitoring.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_event_monitor_start(void);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Stop the device event monitoring.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_event_monitor_stop(void);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Enable hotplug handling for devices.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_hotplug_handle_enable(void);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Disable hotplug handling for devices.
+ *
+ * @return
+ * - On success, zero.
+ * - On failure, a negative value.
+ */
+__rte_experimental
+int
+rte_dev_hotplug_handle_disable(void);
+
+/**
+ * Device level DMA map function.
+ * After a successful call, the memory segment will be mapped to the
+ * given device.
+ *
+ * @note: Memory must be registered in advance using rte_extmem_* APIs.
+ *
+ * @param dev
+ * Device pointer.
+ * @param addr
+ * Virtual address to map.
+ * @param iova
+ * IOVA address to map.
+ * @param len
+ * Length of the memory segment being mapped.
+ *
+ * @return
+ * 0 if mapping was successful.
+ * Negative value and rte_errno is set otherwise.
+ */
+__rte_experimental
+int
+rte_dev_dma_map(struct rte_device *dev, void *addr, uint64_t iova, size_t len);
+
+/**
+ * Device level DMA unmap function.
+ * After a successful call, the memory segment will no longer be
+ * accessible by the given device.
+ *
+ * @note: Memory must be registered in advance using rte_extmem_* APIs.
+ *
+ * @param dev
+ * Device pointer.
+ * @param addr
+ * Virtual address to unmap.
+ * @param iova
+ * IOVA address to unmap.
+ * @param len
+ * Length of the memory segment being mapped.
+ *
+ * @return
+ * 0 if un-mapping was successful.
+ * Negative value and rte_errno is set otherwise.
+ */
+__rte_experimental
+int
+rte_dev_dma_unmap(struct rte_device *dev, void *addr, uint64_t iova,
+ size_t len);
+
+#endif /* _RTE_DEV_H_ */