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Message-Id: <20210331071139.15473-3-xuanzhuo@linux.alibaba.com>
Date: Wed, 31 Mar 2021 15:11:33 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: netdev@...r.kernel.org
Cc: "Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Björn Töpel <bjorn@...nel.org>,
Magnus Karlsson <magnus.karlsson@...el.com>,
Jonathan Lemon <jonathan.lemon@...il.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
KP Singh <kpsingh@...nel.org>,
virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org,
Dust Li <dust.li@...ux.alibaba.com>
Subject: [PATCH net-next v3 2/8] xsk: support get page by addr
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@...ux.alibaba.com>
Reviewed-by: Dust Li <dust.li@...ux.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
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