Function write_back_completed_descs_split

dpdk/lib/vhost/virtio_net.c:2185–2215

}

static __rte_always_inline void
write_back_completed_descs_split(struct vhost_virtqueue *vq, uint16_t n_descs)
	__rte_shared_locks_required(&vq->access_lock)
{
	struct vhost_async *async = vq->async;
	uint16_t nr_left = n_descs;
	uint16_t nr_copy;
	uint16_t to, from;

	do {
		from = async->last_desc_idx_split & (vq->size - 1);
		nr_copy = nr_left + from <= vq->size ? nr_left : vq->size - from;
		to = vq->last_used_idx & (vq->size - 1);

		if (to + nr_copy <= vq->size) {
			rte_memcpy(&vq->used->ring[to], &async->descs_split[from],
					nr_copy * sizeof(struct vring_used_elem));
		} else {
			uint16_t size = vq->size - to;

			rte_memcpy(&vq->used->ring[to], &async->descs_split[from],
					size * sizeof(struct vring_used_elem));
			rte_memcpy(&vq->used->ring[0], &async->descs_split[from + size],
					(nr_copy - size) * sizeof(struct vring_used_elem));
		}

		async->last_desc_idx_split += nr_copy;
		vq->last_used_idx += nr_copy;
		nr_left -= nr_copy;
	} while (nr_left > 0);
}

static __rte_always_inline void
write_back_completed_descs_packed(struct vhost_virtqueue *vq,