Function new_device

dpdk/examples/vhost/main.c:1703–1777

* A new device is added to a data core. First the device is added to the main linked list * and then allocated to a specific data core. */

 * and then allocated to a specific data core.
 */
static int
new_device(int vid)
{
	int lcore, core_add = 0;
	uint16_t i;
	uint32_t device_num_min = num_devices;
	struct vhost_dev *vdev;
	int ret;

	vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
	if (vdev == NULL) {
		RTE_LOG(INFO, VHOST_DATA,
			"(%d) couldn't allocate memory for vhost dev\n",
			vid);
		return -1;
	}
	vdev->vid = vid;

	for (i = 0; i < RTE_MAX_LCORE; i++) {
		vhost_txbuff[i * RTE_MAX_VHOST_DEVICE + vid]
			= rte_zmalloc("vhost bufftable",
				sizeof(struct vhost_bufftable),
				RTE_CACHE_LINE_SIZE);

		if (vhost_txbuff[i * RTE_MAX_VHOST_DEVICE + vid] == NULL) {
			RTE_LOG(INFO, VHOST_DATA,
			  "(%d) couldn't allocate memory for vhost TX\n", vid);
			return -1;
		}
	}

	int socketid = get_socketid_by_vid(vid);
	if (socketid == -1)
		return -1;

	init_vid2socketid_array(vid, socketid);

	ret =  vhost_async_channel_register(vid);

	if (init_vhost_queue_ops(vid) != 0)
		return -1;

	if (builtin_net_driver)
		vs_vhost_net_setup(vdev);

	TAILQ_INSERT_TAIL(&vhost_dev_list, vdev, global_vdev_entry);
	vdev->vmdq_rx_q = vid * queues_per_pool + vmdq_queue_base;

	/*reset ready flag*/
	vdev->ready = DEVICE_MAC_LEARNING;
	vdev->remove = 0;

	/* Find a suitable lcore to add the device. */
	RTE_LCORE_FOREACH_WORKER(lcore) {
		if (lcore_info[lcore].device_num < device_num_min) {
			device_num_min = lcore_info[lcore].device_num;
			core_add = lcore;
		}