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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * if_xdp: XDP socket user-space interface
4 * Copyright(c) 2018 Intel Corporation.
5 *
6 * Author(s): Björn Töpel <bjorn.topel@intel.com>
7 * Magnus Karlsson <magnus.karlsson@intel.com>
8 */
9
10#ifndef _LINUX_IF_XDP_H
11#define _LINUX_IF_XDP_H
12
13#include <linux/types.h>
14
15/* Options for the sxdp_flags field */
16#define XDP_SHARED_UMEM (1 << 0)
17#define XDP_COPY (1 << 1) /* Force copy-mode */
18#define XDP_ZEROCOPY (1 << 2) /* Force zero-copy mode */
19
20struct sockaddr_xdp {
21 __u16 sxdp_family;
22 __u16 sxdp_flags;
23 __u32 sxdp_ifindex;
24 __u32 sxdp_queue_id;
25 __u32 sxdp_shared_umem_fd;
26};
27
28struct xdp_ring_offset {
29 __u64 producer;
30 __u64 consumer;
31 __u64 desc;
32};
33
34struct xdp_mmap_offsets {
35 struct xdp_ring_offset rx;
36 struct xdp_ring_offset tx;
37 struct xdp_ring_offset fr; /* Fill */
38 struct xdp_ring_offset cr; /* Completion */
39};
40
41/* XDP socket options */
42#define XDP_MMAP_OFFSETS 1
43#define XDP_RX_RING 2
44#define XDP_TX_RING 3
45#define XDP_UMEM_REG 4
46#define XDP_UMEM_FILL_RING 5
47#define XDP_UMEM_COMPLETION_RING 6
48#define XDP_STATISTICS 7
49
50struct xdp_umem_reg {
51 __u64 addr; /* Start of packet data area */
52 __u64 len; /* Length of packet data area */
53 __u32 chunk_size;
54 __u32 headroom;
55};
56
57struct xdp_statistics {
58 __u64 rx_dropped; /* Dropped for reasons other than invalid desc */
59 __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
60 __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
61};
62
63/* Pgoff for mmaping the rings */
64#define XDP_PGOFF_RX_RING 0
65#define XDP_PGOFF_TX_RING 0x80000000
66#define XDP_UMEM_PGOFF_FILL_RING 0x100000000ULL
67#define XDP_UMEM_PGOFF_COMPLETION_RING 0x180000000ULL
68
69/* Rx/Tx descriptor */
70struct xdp_desc {
71 __u64 addr;
72 __u32 len;
73 __u32 options;
74};
75
76/* UMEM descriptor is __u64 */
77
78#endif /* _LINUX_IF_XDP_H */