+ bus = rte_bus_find_by_device(dev);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ if (bus->unplug == NULL) {
+ RTE_LOG(ERR, EAL, "Bus function not supported\n");
+ return -ENOTSUP;
+ }
+
+ ret = bus->unplug(dev);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+ dev->name);
+ return ret;
+}
+
+static char *
+full_dev_name(const char *bus, const char *dev, const char *args)
+{
+ char *name;
+ size_t len;
+
+ len = snprintf(NULL, 0, "%s:%s,%s", bus, dev, args) + 1;
+ name = calloc(1, len);
+ if (name == NULL) {
+ RTE_LOG(ERR, EAL, "Could not allocate full device name\n");
+ return NULL;
+ }
+ snprintf(name, len, "%s:%s,%s", bus, dev, args);
+ return name;
+}
+
+int __rte_experimental rte_eal_hotplug_add(const char *busname, const char *devname,
+ const char *devargs)
+{
+ struct rte_bus *bus;
+ struct rte_device *dev;
+ struct rte_devargs *da;
+ char *name;
+ int ret;
+
+ bus = rte_bus_find_by_name(busname);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
+ return -ENOENT;
+ }
+
+ if (bus->plug == NULL) {
+ RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
+ bus->name);
+ return -ENOTSUP;
+ }
+
+ name = full_dev_name(busname, devname, devargs);
+ if (name == NULL)
+ return -ENOMEM;
+
+ da = calloc(1, sizeof(*da));
+ if (da == NULL) {
+ ret = -ENOMEM;
+ goto err_name;
+ }
+
+ ret = rte_eal_devargs_parse(name, da);
+ if (ret)
+ goto err_devarg;
+
+ ret = rte_eal_devargs_insert(da);
+ if (ret)
+ goto err_devarg;
+
+ ret = bus->scan();
+ if (ret)
+ goto err_devarg;
+
+ dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
+ devname);
+ ret = -ENODEV;
+ goto err_devarg;
+ }
+
+ ret = bus->plug(dev);
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
+ dev->name);
+ goto err_devarg;