net/xdp/xsk.h

   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 struct xdp_ring_offset_v1 {
  15         __u64 producer;
  16         __u64 consumer;
  17         __u64 desc;
  18 };
  19
  20 struct xdp_mmap_offsets_v1 {
  21         struct xdp_ring_offset_v1 rx;
  22         struct xdp_ring_offset_v1 tx;
  23         struct xdp_ring_offset_v1 fr;
  24         struct xdp_ring_offset_v1 cr;
  25 };
  26
  27 /* Nodes are linked in the struct xdp_sock map_list field, and used to
  28  * track which maps a certain socket reside in.
  29  */
  30
  31 struct xsk_map_node {
  32         struct list_head node;
  33         struct xsk_map *map;
  34         struct xdp_sock **map_entry;
  35 };
  36
  37 static inline struct xdp_sock *xdp_sk(struct sock *sk)
  38 {
  39         return (struct xdp_sock *)sk;
  40 }
  41
  42 void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
  43                              struct xdp_sock **map_entry);
  44 void xsk_clear_pool_at_qid(struct net_device *dev, u16 queue_id);
  45 int xsk_reg_pool_at_qid(struct net_device *dev, struct xsk_buff_pool *pool,
  46                         u16 queue_id);
  47
  48 #endif /* XSK_H_ */