+/**
+ * Implementation specific probe function which is responsible for linking
+ * devices on that bus with applicable drivers.
+ *
+ * This is called while iterating over each registered bus.
+ *
+ * @return
+ * 0 for successful probe
+ * !0 for any error while probing
+ */
+typedef int (*rte_bus_probe_t)(void);
+
+/**
+ * Device iterator to find a device on a bus.
+ *
+ * This function returns an rte_device if one of those held by the bus
+ * matches the data passed as parameter.
+ *
+ * If the comparison function returns zero this function should stop iterating
+ * over any more devices. To continue a search the device of a previous search
+ * can be passed via the start parameter.
+ *
+ * @param cmp
+ * Comparison function.
+ *
+ * @param data
+ * Data to compare each device against.
+ *
+ * @param start
+ * starting point for the iteration
+ *
+ * @return
+ * The first device matching the data, NULL if none exists.
+ */
+typedef struct rte_device *
+(*rte_bus_find_device_t)(const struct rte_device *start, rte_dev_cmp_t cmp,
+ const void *data);
+
+/**
+ * Implementation specific probe function which is responsible for linking
+ * devices on that bus with applicable drivers.
+ *
+ * @param dev
+ * Device pointer that was returned by a previous call to find_device.
+ *
+ * @return
+ * 0 on success.
+ * !0 on error.
+ */
+typedef int (*rte_bus_plug_t)(struct rte_device *dev);
+
+/**
+ * Implementation specific remove function which is responsible for unlinking
+ * devices on that bus from assigned driver.
+ *
+ * @param dev
+ * Device pointer that was returned by a previous call to find_device.
+ *
+ * @return
+ * 0 on success.
+ * !0 on error.
+ */
+typedef int (*rte_bus_unplug_t)(struct rte_device *dev);
+
+/**
+ * Bus specific parsing function.
+ * Validates the syntax used in the textual representation of a device,
+ * If the syntax is valid and ``addr`` is not NULL, writes the bus-specific
+ * device representation to ``addr``.
+ *
+ * @param[in] name
+ * device textual description
+ *
+ * @param[out] addr
+ * device information location address, into which parsed info
+ * should be written. If NULL, nothing should be written, which
+ * is not an error.
+ *
+ * @return
+ * 0 if parsing was successful.
+ * !0 for any error.
+ */
+typedef int (*rte_bus_parse_t)(const char *name, void *addr);
+
+/**
+ * Bus scan policies
+ */
+enum rte_bus_scan_mode {
+ RTE_BUS_SCAN_UNDEFINED,
+ RTE_BUS_SCAN_WHITELIST,
+ RTE_BUS_SCAN_BLACKLIST,
+};
+
+/**
+ * A structure used to configure bus operations.
+ */
+struct rte_bus_conf {
+ enum rte_bus_scan_mode scan_mode; /**< Scan policy. */
+};
+
+
+/**
+ * Get common iommu class of the all the devices on the bus. The bus may
+ * check that those devices are attached to iommu driver.
+ * If no devices are attached to the bus. The bus may return with don't care
+ * (_DC) value.
+ * Otherwise, The bus will return appropriate _pa or _va iova mode.
+ *
+ * @return
+ * enum rte_iova_mode value.
+ */
+typedef enum rte_iova_mode (*rte_bus_get_iommu_class_t)(void);
+
+