On Tue, Apr 13, 2021 at 9:58 AM Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> wrote:
>
> xsk adds an interface and returns the page corresponding to
> data. virtio-net does not initialize dma, so it needs page to construct
> scatterlist to pass to vring.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
> Reviewed-by: Dust Li <dust.li@xxxxxxxxxxxxxxxxx>
Acked-by: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
> ---
> include/net/xdp_sock_drv.h | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h
> index 4e295541e396..1d08b5d8d15f 100644
> --- a/include/net/xdp_sock_drv.h
> +++ b/include/net/xdp_sock_drv.h
> @@ -72,6 +72,12 @@ static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
> return xp_get_frame_dma(xskb);
> }
>
> +static inline struct page *xsk_buff_xdp_get_page(struct xsk_buff_pool *pool, u64 addr)
> +{
> + addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
> + return pool->umem->pgs[addr >> PAGE_SHIFT];
> +}
> +
> static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
> {
> return xp_alloc(pool);
> @@ -207,6 +213,11 @@ static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
> return 0;
> }
>
> +static inline struct page *xsk_buff_xdp_get_page(struct xsk_buff_pool *pool, u64 addr)
> +{
> + return NULL;
> +}
> +
> static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
> {
> return NULL;
> --
> 2.31.0
>
