diff options
Diffstat (limited to 'include/uapi/linux/if_xdp.h')
-rw-r--r-- | include/uapi/linux/if_xdp.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/include/uapi/linux/if_xdp.h b/include/uapi/linux/if_xdp.h new file mode 100644 index 000000000000..77b88c4efe98 --- /dev/null +++ b/include/uapi/linux/if_xdp.h @@ -0,0 +1,87 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note + * + * if_xdp: XDP socket user-space interface + * Copyright(c) 2018 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * Author(s): Björn Töpel <bjorn.topel@intel.com> + * Magnus Karlsson <magnus.karlsson@intel.com> + */ + +#ifndef _LINUX_IF_XDP_H +#define _LINUX_IF_XDP_H + +#include <linux/types.h> + +/* Options for the sxdp_flags field */ +#define XDP_SHARED_UMEM 1 + +struct sockaddr_xdp { + __u16 sxdp_family; + __u32 sxdp_ifindex; + __u32 sxdp_queue_id; + __u32 sxdp_shared_umem_fd; + __u16 sxdp_flags; +}; + +/* XDP socket options */ +#define XDP_RX_RING 1 +#define XDP_TX_RING 2 +#define XDP_UMEM_REG 3 +#define XDP_UMEM_FILL_RING 4 +#define XDP_UMEM_COMPLETION_RING 5 +#define XDP_STATISTICS 6 + +struct xdp_umem_reg { + __u64 addr; /* Start of packet data area */ + __u64 len; /* Length of packet data area */ + __u32 frame_size; /* Frame size */ + __u32 frame_headroom; /* Frame head room */ +}; + +struct xdp_statistics { + __u64 rx_dropped; /* Dropped for reasons other than invalid desc */ + __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ + __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ +}; + +/* Pgoff for mmaping the rings */ +#define XDP_PGOFF_RX_RING 0 +#define XDP_PGOFF_TX_RING 0x80000000 +#define XDP_UMEM_PGOFF_FILL_RING 0x100000000 +#define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000 + +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; + __u32 desc[0] __attribute__((aligned(64))); +}; + +#endif /* _LINUX_IF_XDP_H */ |