Function virtio_init_vring

dpdk/drivers/net/virtio/virtqueue.c:268–298

static void
virtio_init_vring(struct virtqueue *vq)
{
	int size = vq->vq_nentries;
	uint8_t *ring_mem = vq->vq_ring_virt_mem;

	PMD_INIT_FUNC_TRACE();

	memset(ring_mem, 0, vq->vq_ring_size);

	vq->vq_used_cons_idx = 0;
	vq->vq_desc_head_idx = 0;
	vq->vq_avail_idx = 0;
	vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
	vq->vq_free_cnt = vq->vq_nentries;
	memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
	if (virtio_with_packed_queue(vq->hw)) {
		vring_init_packed(&vq->vq_packed.ring, ring_mem,
				  VIRTIO_VRING_ALIGN, size);
		vring_desc_init_packed(vq, size);
	} else {
		struct vring *vr = &vq->vq_split.ring;

		vring_init_split(vr, ring_mem, VIRTIO_VRING_ALIGN, size);
		vring_desc_init_split(vr->desc, size);
	}
	/*
	 * Disable device(host) interrupting guest
	 */
	virtqueue_disable_intr(vq);
}

static int
virtio_alloc_queue_headers(struct virtqueue *vq, int numa_node, const char *name)