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;
39 unsigned long address;
41 struct work_struct work;
45 struct net_device *dev;
46 struct xdp_umem_fq_reuse *fq_reuse;
49 spinlock_t xsk_list_lock;
50 struct list_head xsk_list;
54 /* struct sock must be the first member of struct xdp_sock */
57 struct net_device *dev;
58 struct xdp_umem *umem;
59 struct list_head flush_node;
61 struct xsk_queue *tx ____cacheline_aligned_in_smp;
62 struct list_head list;
64 /* Protects multiple processes in the control path */
66 /* Mutual exclusion of NAPI TX thread and sendmsg error paths
67 * in the SKB destructor callback.
69 spinlock_t tx_completion_lock;
74 #ifdef CONFIG_XDP_SOCKETS
75 int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
76 int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
77 void xsk_flush(struct xdp_sock *xs);
78 bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
79 /* Used from netdev driver */
80 u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
81 void xsk_umem_discard_addr(struct xdp_umem *umem);
82 void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
83 bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma, u32 *len);
84 void xsk_umem_consume_tx_done(struct xdp_umem *umem);
85 struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries);
86 struct xdp_umem_fq_reuse *xsk_reuseq_swap(struct xdp_umem *umem,
87 struct xdp_umem_fq_reuse *newq);
88 void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq);
89 struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id);
91 static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
93 return umem->pages[addr >> PAGE_SHIFT].addr + (addr & (PAGE_SIZE - 1));
96 static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
98 return umem->pages[addr >> PAGE_SHIFT].dma + (addr & (PAGE_SIZE - 1));
101 /* Reuse-queue aware version of FILL queue helpers */
102 static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
104 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
107 return xsk_umem_peek_addr(umem, addr);
109 *addr = rq->handles[rq->length - 1];
113 static inline void xsk_umem_discard_addr_rq(struct xdp_umem *umem)
115 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
118 xsk_umem_discard_addr(umem);
123 static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
125 struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
127 rq->handles[rq->length++] = addr;
130 static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
135 static inline int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
140 static inline void xsk_flush(struct xdp_sock *xs)
144 static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
149 static inline u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr)
154 static inline void xsk_umem_discard_addr(struct xdp_umem *umem)
158 static inline void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries)
162 static inline bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma,
168 static inline void xsk_umem_consume_tx_done(struct xdp_umem *umem)
172 static inline struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries)
177 static inline struct xdp_umem_fq_reuse *xsk_reuseq_swap(
178 struct xdp_umem *umem,
179 struct xdp_umem_fq_reuse *newq)
183 static inline void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq)
187 static inline struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev,
193 static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
198 static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
203 static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
208 static inline void xsk_umem_discard_addr_rq(struct xdp_umem *umem)
212 static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
216 #endif /* CONFIG_XDP_SOCKETS */
218 #endif /* _LINUX_XDP_SOCK_H */