OSCL-LXR linux-6.0.1/​include/​net/​xdp_sock_drv.h	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /* SPDX-License-Identifier: GPL-2.0 */
 /* Interface for implementing AF_XDP zero-copy support in drivers.
  * Copyright(c) 2020 Intel Corporation.
  */
 
 #ifndef _LINUX_XDP_SOCK_DRV_H
 #define _LINUX_XDP_SOCK_DRV_H
 
 #include <net/xdp_sock.h>
 #include <net/xsk_buff_pool.h>
 
 #ifdef CONFIG_XDP_SOCKETS
 
 void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries);
 bool xsk_tx_peek_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc);
 u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 max);
 void xsk_tx_release(struct xsk_buff_pool *pool);
 struct xsk_buff_pool *xsk_get_pool_from_qid(struct net_device *dev,
                         u16 queue_id);
 void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool);
 void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool);
 void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool);
 void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool);
 bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool);
 
 static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
 {
     return XDP_PACKET_HEADROOM + pool->headroom;
 }
 
 static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
 {
     return pool->chunk_size;
 }
 
 static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
 {
     return xsk_pool_get_chunk_size(pool) - xsk_pool_get_headroom(pool);
 }
 
 static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
                      struct xdp_rxq_info *rxq)
 {
     xp_set_rxq_info(pool, rxq);
 }
 
 static inline unsigned int xsk_pool_get_napi_id(struct xsk_buff_pool *pool)
 {
 #ifdef CONFIG_NET_RX_BUSY_POLL
     return pool->heads[0].xdp.rxq->napi_id;
 #else
     return 0;
 #endif
 }
 
 static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
                       unsigned long attrs)
 {
     xp_dma_unmap(pool, attrs);
 }
 
 static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
                    struct device *dev, unsigned long attrs)
 {
     struct xdp_umem *umem = pool->umem;
 
     return xp_dma_map(pool, dev, attrs, umem->pgs, umem->npgs);
 }
 
 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
 {
     struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
     return xp_get_dma(xskb);
 }
 
 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
 {
     struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
     return xp_get_frame_dma(xskb);
 }
 
 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
 {
     return xp_alloc(pool);
 }
 
 /* Returns as many entries as possible up to max. 0 <= N <= max. */
 static inline u32 xsk_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
 {
     return xp_alloc_batch(pool, xdp, max);
 }
 
 static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
 {
     return xp_can_alloc(pool, count);
 }
 
 static inline void xsk_buff_free(struct xdp_buff *xdp)
 {
     struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
     xp_free(xskb);
 }
 
 static inline void xsk_buff_discard(struct xdp_buff *xdp)
 {
     struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
     xp_release(xskb);
 }
 
 static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
 {
     xdp->data = xdp->data_hard_start + XDP_PACKET_HEADROOM;
     xdp->data_meta = xdp->data;
     xdp->data_end = xdp->data + size;
 }
 
 static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
                           u64 addr)
 {
     return xp_raw_get_dma(pool, addr);
 }
 
 static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
 {
     return xp_raw_get_data(pool, addr);
 }
 
 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
 {
     struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
 
     if (!pool->dma_need_sync)
         return;
 
     xp_dma_sync_for_cpu(xskb);
 }
 
 static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
                             dma_addr_t dma,
                             size_t size)
 {
     xp_dma_sync_for_device(pool, dma, size);
 }
 
 #else
 
 static inline void xsk_tx_completed(struct xsk_buff_pool *pool, u32 nb_entries)
 {
 }
 
 static inline bool xsk_tx_peek_desc(struct xsk_buff_pool *pool,
                     struct xdp_desc *desc)
 {
     return false;
 }
 
 static inline u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 max)
 {
     return 0;
 }
 
 static inline void xsk_tx_release(struct xsk_buff_pool *pool)
 {
 }
 
 static inline struct xsk_buff_pool *
 xsk_get_pool_from_qid(struct net_device *dev, u16 queue_id)
 {
     return NULL;
 }
 
 static inline void xsk_set_rx_need_wakeup(struct xsk_buff_pool *pool)
 {
 }
 
 static inline void xsk_set_tx_need_wakeup(struct xsk_buff_pool *pool)
 {
 }
 
 static inline void xsk_clear_rx_need_wakeup(struct xsk_buff_pool *pool)
 {
 }
 
 static inline void xsk_clear_tx_need_wakeup(struct xsk_buff_pool *pool)
 {
 }
 
 static inline bool xsk_uses_need_wakeup(struct xsk_buff_pool *pool)
 {
     return false;
 }
 
 static inline u32 xsk_pool_get_headroom(struct xsk_buff_pool *pool)
 {
     return 0;
 }
 
 static inline u32 xsk_pool_get_chunk_size(struct xsk_buff_pool *pool)
 {
     return 0;
 }
 
 static inline u32 xsk_pool_get_rx_frame_size(struct xsk_buff_pool *pool)
 {
     return 0;
 }
 
 static inline void xsk_pool_set_rxq_info(struct xsk_buff_pool *pool,
                      struct xdp_rxq_info *rxq)
 {
 }
 
 static inline unsigned int xsk_pool_get_napi_id(struct xsk_buff_pool *pool)
 {
     return 0;
 }
 
 static inline void xsk_pool_dma_unmap(struct xsk_buff_pool *pool,
                       unsigned long attrs)
 {
 }
 
 static inline int xsk_pool_dma_map(struct xsk_buff_pool *pool,
                    struct device *dev, unsigned long attrs)
 {
     return 0;
 }
 
 static inline dma_addr_t xsk_buff_xdp_get_dma(struct xdp_buff *xdp)
 {
     return 0;
 }
 
 static inline dma_addr_t xsk_buff_xdp_get_frame_dma(struct xdp_buff *xdp)
 {
     return 0;
 }
 
 static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool)
 {
     return NULL;
 }
 
 static inline u32 xsk_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
 {
     return 0;
 }
 
 static inline bool xsk_buff_can_alloc(struct xsk_buff_pool *pool, u32 count)
 {
     return false;
 }
 
 static inline void xsk_buff_free(struct xdp_buff *xdp)
 {
 }
 
 static inline void xsk_buff_discard(struct xdp_buff *xdp)
 {
 }
 
 static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
 {
 }
 
 static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
                           u64 addr)
 {
     return 0;
 }
 
 static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
 {
     return NULL;
 }
 
 static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp, struct xsk_buff_pool *pool)
 {
 }
 
 static inline void xsk_buff_raw_dma_sync_for_device(struct xsk_buff_pool *pool,
                             dma_addr_t dma,
                             size_t size)
 {
 }
 
 #endif /* CONFIG_XDP_SOCKETS */
 
 #endif /* _LINUX_XDP_SOCK_DRV_H */

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