On Fri, May 17, 2019 at 05:06:11PM +0200, Maxime Coquelin wrote:
[...]
>
> +static void
> +copy_vnet_hdr_from_desc(struct virtio_net_hdr *hdr,
> + struct buf_vector *buf_vec)
> +{
> + uint64_t len;
> + uint64_t remain = sizeof(struct virtio_net_hdr);
> + uint64_t src;
> + uint64_t dst = (uint64_t)(uintptr_t)&hdr;
typo: s/&hdr/hdr/
> +
> + /*
> + * No luck, the virtio-net header doesn't fit
> + * in a contiguous virtual area.
> + */
> + while (remain) {
> + len = RTE_MIN(remain, buf_vec->buf_len);
> + src = buf_vec->buf_addr;
> + rte_memcpy((void *)(uintptr_t)dst,
> + (void *)(uintptr_t)src, len);
> +
> + remain -= len;
> + dst += len;
> + buf_vec++;
> + }
> +}
> +
> static __rte_always_inline int
> copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq,
> struct buf_vector *buf_vec, uint16_t nr_vec,
> @@ -1094,28 +1126,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct
> vhost_virtqueue *vq,
>
> if (virtio_net_with_host_offload(dev)) {
> if (unlikely(buf_len < sizeof(struct virtio_net_hdr))) {
> - uint64_t len;
> - uint64_t remain = sizeof(struct virtio_net_hdr);
> - uint64_t src;
> - uint64_t dst = (uint64_t)(uintptr_t)&tmp_hdr;
> - uint16_t hdr_vec_idx = 0;
> -
> - /*
> - * No luck, the virtio-net header doesn't fit
> - * in a contiguous virtual area.
> - */
It's better to not move above comments.
For the rest,
Reviewed-by: Tiwei Bie <tiwei....@intel.com>
> - while (remain) {
> - len = RTE_MIN(remain,
> - buf_vec[hdr_vec_idx].buf_len);
> - src = buf_vec[hdr_vec_idx].buf_addr;
> - rte_memcpy((void *)(uintptr_t)dst,
> - (void *)(uintptr_t)src, len);
> -
> - remain -= len;
> - dst += len;
> - hdr_vec_idx++;
> - }
> -
> + copy_vnet_hdr_from_desc(&tmp_hdr, buf_vec);
> hdr = &tmp_hdr;
> } else {
> hdr = (struct virtio_net_hdr *)((uintptr_t)buf_addr);
> --
> 2.21.0
>
