1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Interface for implementing AF_XDP zero-copy support in drivers.
3 * Copyright(c) 2020 Intel Corporation.
6 #ifndef _LINUX_XDP_SOCK_DRV_H
7 #define _LINUX_XDP_SOCK_DRV_H
9 #include <net/xdp_sock.h>
10 #include <net/xsk_buff_pool.h>
12 #ifdef CONFIG_XDP_SOCKETS
14 void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries);
15 bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc);
16 u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *desc, u32 max);
17 void xsk_tx_release(struct xsk_buff_pool *pool);
18 struct xsk_buff_pool *xsk_get_pool_from_qid(struct net_device *dev,
20 void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool);
21 void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool);
22 void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool);
23 void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool);
24 bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool);
26 static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
28 return XDP_PACKET_HEADROOM + pool->headroom;
31 static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
33 return pool->chunk_size;
36 static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
38 return xsk_pool_get_chunk_size(pool) - xsk_pool_get_headroom(pool);
41 static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
42 struct xdp_rxq_info *rxq)
44 xp_set_rxq_info(pool, rxq);
47 static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
50 xp_dma_unmap(pool, attrs);
53 static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
54 struct device *dev, unsigned long attrs)
56 struct xdp_umem *umem = pool->umem;
58 return xp_dma_map(pool, dev, attrs, umem->pgs, umem->npgs);
61 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
63 struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
65 return xp_get_dma(xskb);
68 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
70 struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
72 return xp_get_frame_dma(xskb);
75 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
77 return xp_alloc(pool);
80 static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
82 return xp_can_alloc(pool, count);
85 static inline void xsk_buff_free(struct xdp_buff *xdp)
87 struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
92 static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
95 return xp_raw_get_dma(pool, addr);
98 static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
100 return xp_raw_get_data(pool, addr);
103 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
105 struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
107 if (!pool->dma_need_sync)
110 xp_dma_sync_for_cpu(xskb);
113 static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
117 xp_dma_sync_for_device(pool, dma, size);
122 static inline void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
126 static inline bool xsk_tx_peek_desc(struct xsk_buff_pool *pool,
127 struct xdp_desc *desc)
132 static inline u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *desc,
138 static inline void xsk_tx_release(struct xsk_buff_pool *pool)
142 static inline struct xsk_buff_pool *
143 xsk_get_pool_from_qid(struct net_device *dev, u16 queue_id)
148 static inline void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool)
152 static inline void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool)
156 static inline void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool)
160 static inline void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool)
164 static inline bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool)
169 static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
174 static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
179 static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
184 static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
185 struct xdp_rxq_info *rxq)
189 static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
194 static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
195 struct device *dev, unsigned long attrs)
200 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
205 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
210 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
215 static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
220 static inline void xsk_buff_free(struct xdp_buff *xdp)
224 static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
230 static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
235 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
239 static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
245 #endif /* CONFIG_XDP_SOCKETS */
247 #endif /* _LINUX_XDP_SOCK_DRV_H */