1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* AF_XDP internal functions
3 * Copyright(c) 2018 Intel Corporation.
6 #ifndef _LINUX_XDP_SOCK_H
7 #define _LINUX_XDP_SOCK_H
9 #include <linux/workqueue.h>
10 #include <linux/if_xdp.h>
11 #include <linux/mutex.h>
12 #include <linux/spinlock.h>
19 struct xdp_umem_page {
24 struct xdp_umem_fq_reuse {
33 struct xdp_umem_page *pages;
38 struct user_struct *user;
40 unsigned long address;
42 struct work_struct work;
46 struct net_device *dev;
47 struct xdp_umem_fq_reuse *fq_reuse;
50 spinlock_t xsk_list_lock;
51 struct list_head xsk_list;
55 /* struct sock must be the first member of struct xdp_sock */
58 struct net_device *dev;
59 struct xdp_umem *umem;
60 struct list_head flush_node;
62 struct xsk_queue *tx ____cacheline_aligned_in_smp;
63 struct list_head list;
65 /* Protects multiple processes in the control path */
67 /* Mutual exclusion of NAPI TX thread and sendmsg error paths
68 * in the SKB destructor callback.
70 spinlock_t tx_completion_lock;
75 #ifdef CONFIG_XDP_SOCKETS
76 int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
77 int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
78 void xsk_flush(struct xdp_sock *xs);
79 bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
80 /* Used from netdev driver */
81 u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
82 void xsk_umem_discard_addr(struct xdp_umem *umem);
83 void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
84 bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma, u32 *len);
85 void xsk_umem_consume_tx_done(struct xdp_umem *umem);
86 struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries);
87 struct xdp_umem_fq_reuse *xsk_reuseq_swap(struct xdp_umem *umem,
88 struct xdp_umem_fq_reuse *newq);
89 void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq);
90 struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id);
92 static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
94 return umem->pages[addr >> PAGE_SHIFT].addr + (addr & (PAGE_SIZE - 1));
97 static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
99 return umem->pages[addr >> PAGE_SHIFT].dma + (addr & (PAGE_SIZE - 1));
102 /* Reuse-queue aware version of FILL queue helpers */
103 static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
105 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
108 return xsk_umem_peek_addr(umem, addr);
110 *addr = rq->handles[rq->length - 1];
114 static inline void xsk_umem_discard_addr_rq(struct xdp_umem *umem)
116 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
119 xsk_umem_discard_addr(umem);
124 static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
126 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
128 rq->handles[rq->length++] = addr;
131 static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
136 static inline int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
141 static inline void xsk_flush(struct xdp_sock *xs)
145 static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
150 static inline u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr)
155 static inline void xsk_umem_discard_addr(struct xdp_umem *umem)
159 static inline void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries)
163 static inline bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma,
169 static inline void xsk_umem_consume_tx_done(struct xdp_umem *umem)
173 static inline struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries)
178 static inline struct xdp_umem_fq_reuse *xsk_reuseq_swap(
179 struct xdp_umem *umem,
180 struct xdp_umem_fq_reuse *newq)
184 static inline void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq)
188 static inline struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev,
194 static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
199 static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
204 static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
209 static inline void xsk_umem_discard_addr_rq(struct xdp_umem *umem)
213 static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
217 #endif /* CONFIG_XDP_SOCKETS */
219 #endif /* _LINUX_XDP_SOCK_H */