[PATCH net-next v3 2/8] xsk: support get page by addr
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2021-03-31 07:12:19
Also in:
netdev
Subsystem:
networking [general], the rest, xdp sockets (af_xdp) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Magnus Karlsson, Maciej Fijalkowski
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@linux.alibaba.com> Reviewed-by: Dust Li <dust.li@linux.alibaba.com> --- 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