From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- include/net/xdp_sock_drv.h | 366 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 366 insertions(+) create mode 100644 include/net/xdp_sock_drv.h (limited to 'include/net/xdp_sock_drv.h') diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h new file mode 100644 index 0000000000..5425f7ad5e --- /dev/null +++ b/include/net/xdp_sock_drv.h @@ -0,0 +1,366 @@ +/* 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 +#include + +#define XDP_UMEM_MIN_CHUNK_SHIFT 11 +#define XDP_UMEM_MIN_CHUNK_SIZE (1 << XDP_UMEM_MIN_CHUNK_SHIFT) + +#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); +} + +static inline bool xsk_is_eop_desc(struct xdp_desc *desc) +{ + return !xp_mb_desc(desc); +} + +/* 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); + struct list_head *xskb_list = &xskb->pool->xskb_list; + struct xdp_buff_xsk *pos, *tmp; + + if (likely(!xdp_buff_has_frags(xdp))) + goto out; + + list_for_each_entry_safe(pos, tmp, xskb_list, xskb_list_node) { + list_del(&pos->xskb_list_node); + xp_free(pos); + } + + xdp_get_shared_info_from_buff(xdp)->nr_frags = 0; +out: + xp_free(xskb); +} + +static inline void xsk_buff_add_frag(struct xdp_buff *xdp) +{ + struct xdp_buff_xsk *frag = container_of(xdp, struct xdp_buff_xsk, xdp); + + list_add_tail(&frag->xskb_list_node, &frag->pool->xskb_list); +} + +static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +{ + struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp); + struct xdp_buff *ret = NULL; + struct xdp_buff_xsk *frag; + + frag = list_first_entry_or_null(&xskb->pool->xskb_list, + struct xdp_buff_xsk, xskb_list_node); + if (frag) { + list_del(&frag->xskb_list_node); + ret = &frag->xdp; + } + + return ret; +} + +static inline void xsk_buff_del_tail(struct xdp_buff *tail) +{ + struct xdp_buff_xsk *xskb = container_of(tail, struct xdp_buff_xsk, xdp); + + list_del(&xskb->xskb_list_node); +} + +static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first) +{ + struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp); + struct xdp_buff_xsk *frag; + + frag = list_last_entry(&xskb->pool->xskb_list, struct xdp_buff_xsk, + xskb_list_node); + return &frag->xdp; +} + +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; + xdp->flags = 0; +} + +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 bool xsk_is_eop_desc(struct xdp_desc *desc) +{ + return false; +} + +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_add_frag(struct xdp_buff *xdp) +{ +} + +static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +{ + return NULL; +} + +static inline void xsk_buff_del_tail(struct xdp_buff *tail) +{ +} + +static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first) +{ + return NULL; +} + +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 */ -- cgit v1.2.3