From b9b6b68e8abd101be6eb5330e4999218c696d1e8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Date: Wed, 2 May 2018 13:01:25 +0200 Subject: xsk: add Rx queue setup and mmap support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Another setsockopt (XDP_RX_QUEUE) is added to let the process allocate a queue, where the kernel can pass completed Rx frames from the kernel to user process. The mmapping of the queue is done using the XDP_PGOFF_RX_QUEUE offset. Signed-off-by: Björn Töpel Signed-off-by: Alexei Starovoitov --- include/uapi/linux/if_xdp.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/if_xdp.h b/include/uapi/linux/if_xdp.h index 975661e1baca..65324558829d 100644 --- a/include/uapi/linux/if_xdp.h +++ b/include/uapi/linux/if_xdp.h @@ -22,6 +22,7 @@ #include /* XDP socket options */ +#define XDP_RX_RING 1 #define XDP_UMEM_REG 3 #define XDP_UMEM_FILL_RING 4 @@ -33,13 +34,28 @@ struct xdp_umem_reg { }; /* Pgoff for mmaping the rings */ +#define XDP_PGOFF_RX_RING 0 #define XDP_UMEM_PGOFF_FILL_RING 0x100000000 +struct xdp_desc { + __u32 idx; + __u32 len; + __u16 offset; + __u8 flags; + __u8 padding[5]; +}; + struct xdp_ring { __u32 producer __attribute__((aligned(64))); __u32 consumer __attribute__((aligned(64))); }; +/* Used for the RX and TX queues for packets */ +struct xdp_rxtx_ring { + struct xdp_ring ptrs; + struct xdp_desc desc[0] __attribute__((aligned(64))); +}; + /* Used for the fill and completion queues for buffers */ struct xdp_umem_ring { struct xdp_ring ptrs; -- cgit v1.2.3