1/* SPDX-License-Identifier: GPL-2.0 */
 2/* Copyright(c) 2019 Intel Corporation. */
 3
 4#ifndef XSK_H_
 5#define XSK_H_
 6
 7/* Masks for xdp_umem_page flags.
 8 * The low 12-bits of the addr will be 0 since this is the page address, so we
 9 * can use them for flags.
10 */
11#define XSK_NEXT_PG_CONTIG_SHIFT 0
12#define XSK_NEXT_PG_CONTIG_MASK BIT_ULL(XSK_NEXT_PG_CONTIG_SHIFT)
13
14/* Flags for the umem flags field.
15 *
16 * The NEED_WAKEUP flag is 1 due to the reuse of the flags field for public
17 * flags. See inlude/uapi/include/linux/if_xdp.h.
18 */
19#define XDP_UMEM_USES_NEED_WAKEUP BIT(1)
20
21struct xdp_ring_offset_v1 {
22	__u64 producer;
23	__u64 consumer;
24	__u64 desc;
25};
26
27struct xdp_mmap_offsets_v1 {
28	struct xdp_ring_offset_v1 rx;
29	struct xdp_ring_offset_v1 tx;
30	struct xdp_ring_offset_v1 fr;
31	struct xdp_ring_offset_v1 cr;
32};
33
34/* Nodes are linked in the struct xdp_sock map_list field, and used to
35 * track which maps a certain socket reside in.
36 */
37
38struct xsk_map_node {
39	struct list_head node;
40	struct xsk_map *map;
41	struct xdp_sock **map_entry;
42};
43
44static inline struct xdp_sock *xdp_sk(struct sock *sk)
45{
46	return (struct xdp_sock *)sk;
47}
48
49bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
50void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
51			     struct xdp_sock **map_entry);
52int xsk_map_inc(struct xsk_map *map);
53void xsk_map_put(struct xsk_map *map);
54
55#endif /* XSK_H_ */