LXR linux/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
  14struct xdp_ring_offset_v1 {
  15        __u64 producer;
  16        __u64 consumer;
  17        __u64 desc;
  18};
  19
  20struct 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
  31struct xsk_map_node {
  32        struct list_head node;
  33        struct xsk_map *map;
  34        struct xdp_sock __rcu **map_entry;
  35};
  36
  37static inline struct xdp_sock *xdp_sk(struct sock *sk)
  38{
  39        return (struct xdp_sock *)sk;
  40}
  41
  42void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
  43                             struct xdp_sock __rcu **map_entry);
  44void xsk_clear_pool_at_qid(struct net_device *dev, u16 queue_id);
  45int xsk_reg_pool_at_qid(struct net_device *dev, struct xsk_buff_pool *pool,
  46                        u16 queue_id);
  47
  48#endif /* XSK_H_ */
  49