include/net/xdp_sock_drv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Interface for implementing AF_XDP zero-copy support in drivers.
   3  * Copyright(c) 2020 Intel Corporation.
   4  */
   5
   6 #ifndef _LINUX_XDP_SOCK_DRV_H
   7 #define _LINUX_XDP_SOCK_DRV_H
   8
   9 #include <net/xdp_sock.h>
  10 #include <net/xsk_buff_pool.h>
  11
  12 #ifdef CONFIG_XDP_SOCKETS
  13
  14 void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
  15 bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc);
  16 void xsk_umem_consume_tx_done(struct xdp_umem *umem);
  17 struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id);
  18 void xsk_set_rx_need_wakeup(struct xdp_umem *umem);
  19 void xsk_set_tx_need_wakeup(struct xdp_umem *umem);
  20 void xsk_clear_rx_need_wakeup(struct xdp_umem *umem);
  21 void xsk_clear_tx_need_wakeup(struct xdp_umem *umem);
  22 bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem);
  23
  24 static inline u32 xsk_umem_get_headroom(struct xdp_umem *umem)
  25 {
  26         return XDP_PACKET_HEADROOM + umem->headroom;
  27 }
  28
  29 static inline u32 xsk_umem_get_chunk_size(struct xdp_umem *umem)
  30 {
  31         return umem->chunk_size;
  32 }
  33
  34 static inline u32 xsk_umem_get_rx_frame_size(struct xdp_umem *umem)
  35 {
  36         return xsk_umem_get_chunk_size(umem) - xsk_umem_get_headroom(umem);
  37 }
  38
  39 static inline void xsk_buff_set_rxq_info(struct xdp_umem *umem,
  40                                          struct xdp_rxq_info *rxq)
  41 {
  42         xp_set_rxq_info(umem->pool, rxq);
  43 }
  44
  45 static inline void xsk_buff_dma_unmap(struct xdp_umem *umem,
  46                                       unsigned long attrs)
  47 {
  48         xp_dma_unmap(umem->pool, attrs);
  49 }
  50
  51 static inline int xsk_buff_dma_map(struct xdp_umem *umem, struct device *dev,
  52                                    unsigned long attrs)
  53 {
  54         return xp_dma_map(umem->pool, dev, attrs, umem->pgs, umem->npgs);
  55 }
  56
  57 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
  58 {
  59         struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
  60
  61         return xp_get_dma(xskb);
  62 }
  63
  64 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
  65 {
  66         struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
  67
  68         return xp_get_frame_dma(xskb);
  69 }
  70
  71 static inline struct xdp_buff *xsk_buff_alloc(struct xdp_umem *umem)
  72 {
  73         return xp_alloc(umem->pool);
  74 }
  75
  76 static inline bool xsk_buff_can_alloc(struct xdp_umem *umem, u32 count)
  77 {
  78         return xp_can_alloc(umem->pool, count);
  79 }
  80
  81 static inline void xsk_buff_free(struct xdp_buff *xdp)
  82 {
  83         struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
  84
  85         xp_free(xskb);
  86 }
  87
  88 static inline dma_addr_t xsk_buff_raw_get_dma(struct xdp_umem *umem, u64 addr)
  89 {
  90         return xp_raw_get_dma(umem->pool, addr);
  91 }
  92
  93 static inline void *xsk_buff_raw_get_data(struct xdp_umem *umem, u64 addr)
  94 {
  95         return xp_raw_get_data(umem->pool, addr);
  96 }
  97
  98 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp)
  99 {
 100         struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 101
 102         xp_dma_sync_for_cpu(xskb);
 103 }
 104
 105 static inline void xsk_buff_raw_dma_sync_for_device(struct xdp_umem *umem,
 106                                                     dma_addr_t dma,
 107                                                     size_t size)
 108 {
 109         xp_dma_sync_for_device(umem->pool, dma, size);
 110 }
 111
 112 #else
 113
 114 static inline void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries)
 115 {
 116 }
 117
 118 static inline bool xsk_umem_consume_tx(struct xdp_umem *umem,
 119                                        struct xdp_desc *desc)
 120 {
 121         return false;
 122 }
 123
 124 static inline void xsk_umem_consume_tx_done(struct xdp_umem *umem)
 125 {
 126 }
 127
 128 static inline struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev,
 129                                                      u16 queue_id)
 130 {
 131         return NULL;
 132 }
 133
 134 static inline void xsk_set_rx_need_wakeup(struct xdp_umem *umem)
 135 {
 136 }
 137
 138 static inline void xsk_set_tx_need_wakeup(struct xdp_umem *umem)
 139 {
 140 }
 141
 142 static inline void xsk_clear_rx_need_wakeup(struct xdp_umem *umem)
 143 {
 144 }
 145
 146 static inline void xsk_clear_tx_need_wakeup(struct xdp_umem *umem)
 147 {
 148 }
 149
 150 static inline bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem)
 151 {
 152         return false;
 153 }
 154
 155 static inline u32 xsk_umem_get_headroom(struct xdp_umem *umem)
 156 {
 157         return 0;
 158 }
 159
 160 static inline u32 xsk_umem_get_chunk_size(struct xdp_umem *umem)
 161 {
 162         return 0;
 163 }
 164
 165 static inline u32 xsk_umem_get_rx_frame_size(struct xdp_umem *umem)
 166 {
 167         return 0;
 168 }
 169
 170 static inline void xsk_buff_set_rxq_info(struct xdp_umem *umem,
 171                                          struct xdp_rxq_info *rxq)
 172 {
 173 }
 174
 175 static inline void xsk_buff_dma_unmap(struct xdp_umem *umem,
 176                                       unsigned long attrs)
 177 {
 178 }
 179
 180 static inline int xsk_buff_dma_map(struct xdp_umem *umem, struct device *dev,
 181                                    unsigned long attrs)
 182 {
 183         return 0;
 184 }
 185
 186 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
 187 {
 188         return 0;
 189 }
 190
 191 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
 192 {
 193         return 0;
 194 }
 195
 196 static inline struct xdp_buff *xsk_buff_alloc(struct xdp_umem *umem)
 197 {
 198         return NULL;
 199 }
 200
 201 static inline bool xsk_buff_can_alloc(struct xdp_umem *umem, u32 count)
 202 {
 203         return false;
 204 }
 205
 206 static inline void xsk_buff_free(struct xdp_buff *xdp)
 207 {
 208 }
 209
 210 static inline dma_addr_t xsk_buff_raw_get_dma(struct xdp_umem *umem, u64 addr)
 211 {
 212         return 0;
 213 }
 214
 215 static inline void *xsk_buff_raw_get_data(struct xdp_umem *umem, u64 addr)
 216 {
 217         return NULL;
 218 }
 219
 220 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp)
 221 {
 222 }
 223
 224 static inline void xsk_buff_raw_dma_sync_for_device(struct xdp_umem *umem,
 225                                                     dma_addr_t dma,
 226                                                     size_t size)
 227 {
 228 }
 229
 230 #endif /* CONFIG_XDP_SOCKETS */
 231
 232 #endif /* _LINUX_XDP_SOCK_DRV_H */