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 21 struct xdp_ring_offset_v1 { 22 __u64 producer; 23 __u64 consumer; 24 __u64 desc; 25 }; 26 27 struct 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 38 struct xsk_map_node { 39 struct list_head node; 40 struct xsk_map *map; 41 struct xdp_sock **map_entry; 42 }; 43 44 static inline struct xdp_sock *xdp_sk(struct sock *sk) 45 { 46 return (struct xdp_sock *)sk; 47 } 48 49 bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs); 50 void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs, 51 struct xdp_sock **map_entry); 52 int xsk_map_inc(struct xsk_map *map); 53 void xsk_map_put(struct xsk_map *map); 54 55 #endif /* XSK_H_ */ 56