/* 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_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries); bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc); void xsk_umem_consume_tx_done(struct xdp_umem *umem); struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id); void xsk_set_rx_need_wakeup(struct xdp_umem *umem); void xsk_set_tx_need_wakeup(struct xdp_umem *umem); void xsk_clear_rx_need_wakeup(struct xdp_umem *umem); void xsk_clear_tx_need_wakeup(struct xdp_umem *umem); bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem); static inline u32 xsk_umem_get_headroom(struct xdp_umem *umem) { return XDP_PACKET_HEADROOM + umem->headroom; } static inline u32 xsk_umem_get_chunk_size(struct xdp_umem *umem) { return umem->chunk_size; } static inline u32 xsk_umem_get_rx_frame_size(struct xdp_umem *umem) { return xsk_umem_get_chunk_size(umem) - xsk_umem_get_headroom(umem); } static inline void xsk_buff_set_rxq_info(struct xdp_umem *umem, struct xdp_rxq_info *rxq) { xp_set_rxq_info(umem->pool, rxq); } static inline void xsk_buff_dma_unmap(struct xdp_umem *umem, unsigned long attrs) { xp_dma_unmap(umem->pool, attrs); } static inline int xsk_buff_dma_map(struct xdp_umem *umem, struct device *dev, unsigned long attrs) { return xp_dma_map(umem->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 xdp_umem *umem) { return xp_alloc(umem->pool); } static inline bool xsk_buff_can_alloc(struct xdp_umem *umem, u32 count) { return xp_can_alloc(umem->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 dma_addr_t xsk_buff_raw_get_dma(struct xdp_umem *umem, u64 addr) { return xp_raw_get_dma(umem->pool, addr); } static inline void *xsk_buff_raw_get_data(struct xdp_umem *umem, u64 addr) { return xp_raw_get_data(umem->pool, addr); } static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp) { struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp); xp_dma_sync_for_cpu(xskb); } static inline void xsk_buff_raw_dma_sync_for_device(struct xdp_umem *umem, dma_addr_t dma, size_t size) { xp_dma_sync_for_device(umem->pool, dma, size); } #else static inline void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries) { } static inline bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc) { return false; } static inline void xsk_umem_consume_tx_done(struct xdp_umem *umem) { } static inline struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id) { return NULL; } static inline void xsk_set_rx_need_wakeup(struct xdp_umem *umem) { } static inline void xsk_set_tx_need_wakeup(struct xdp_umem *umem) { } static inline void xsk_clear_rx_need_wakeup(struct xdp_umem *umem) { } static inline void xsk_clear_tx_need_wakeup(struct xdp_umem *umem) { } static inline bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem) { return false; } static inline u32 xsk_umem_get_headroom(struct xdp_umem *umem) { return 0; } static inline u32 xsk_umem_get_chunk_size(struct xdp_umem *umem) { return 0; } static inline u32 xsk_umem_get_rx_frame_size(struct xdp_umem *umem) { return 0; } static inline void xsk_buff_set_rxq_info(struct xdp_umem *umem, struct xdp_rxq_info *rxq) { } static inline void xsk_buff_dma_unmap(struct xdp_umem *umem, unsigned long attrs) { } static inline int xsk_buff_dma_map(struct xdp_umem *umem, 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 xdp_umem *umem) { return NULL; } static inline bool xsk_buff_can_alloc(struct xdp_umem *umem, u32 count) { return false; } static inline void xsk_buff_free(struct xdp_buff *xdp) { } static inline dma_addr_t xsk_buff_raw_get_dma(struct xdp_umem *umem, u64 addr) { return 0; } static inline void *xsk_buff_raw_get_data(struct xdp_umem *umem, u64 addr) { return NULL; } static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp) { } static inline void xsk_buff_raw_dma_sync_for_device(struct xdp_umem *umem, dma_addr_t dma, size_t size) { } #endif /* CONFIG_XDP_SOCKETS */ #endif /* _LINUX_XDP_SOCK_DRV_H */