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