On Wed, 24 Jan 2024 17:37:38 +0800, Yunjian Wang <wangyunjian@xxxxxxxxxx> wrote:
> Now dma mappings are used by the physical NICs. However the vNIC
> maybe do not need them. So remove non-zero 'dma_page' check in
> xp_assign_dev.
Could you tell me which one nic can work with AF_XDP without DMA?
Thanks.
>
> Signed-off-by: Yunjian Wang <wangyunjian@xxxxxxxxxx>
> ---
> net/xdp/xsk_buff_pool.c | 7 -------
> 1 file changed, 7 deletions(-)
>
> diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
> index 28711cc44ced..939b6e7b59ff 100644
> --- a/net/xdp/xsk_buff_pool.c
> +++ b/net/xdp/xsk_buff_pool.c
> @@ -219,16 +219,9 @@ int xp_assign_dev(struct xsk_buff_pool *pool,
> if (err)
> goto err_unreg_pool;
>
> - if (!pool->dma_pages) {
> - WARN(1, "Driver did not DMA map zero-copy buffers");
> - err = -EINVAL;
> - goto err_unreg_xsk;
> - }
> pool->umem->zc = true;
> return 0;
>
> -err_unreg_xsk:
> - xp_disable_drv_zc(pool);
> err_unreg_pool:
> if (!force_zc)
> err = 0; /* fallback to copy mode */
> --
> 2.33.0
>
>
