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163943ac00
XSk infra's been using its own DMA sync shortcut to try avoiding redundant function calls. Now that there is a generic one, remove the custom implementation and rely on the generic helpers. xsk_buff_dma_sync_for_cpu() doesn't need the second argument anymore, remove it. Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
415 lines
9.2 KiB
C
415 lines
9.2 KiB
C
/* 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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#define XDP_UMEM_MIN_CHUNK_SHIFT 11
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#define XDP_UMEM_MIN_CHUNK_SIZE (1 << XDP_UMEM_MIN_CHUNK_SHIFT)
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struct xsk_cb_desc {
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void *src;
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u8 off;
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u8 bytes;
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};
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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, 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_fill_cb(struct xsk_buff_pool *pool,
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struct xsk_cb_desc *desc)
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{
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xp_fill_cb(pool, desc);
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}
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static inline unsigned int xsk_pool_get_napi_id(struct xsk_buff_pool *pool)
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{
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#ifdef CONFIG_NET_RX_BUSY_POLL
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return pool->heads[0].xdp.rxq->napi_id;
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#else
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return 0;
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#endif
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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_is_eop_desc(struct xdp_desc *desc)
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{
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return !xp_mb_desc(desc);
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}
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/* Returns as many entries as possible up to max. 0 <= N <= max. */
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static inline u32 xsk_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
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{
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return xp_alloc_batch(pool, xdp, max);
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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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struct list_head *xskb_list = &xskb->pool->xskb_list;
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struct xdp_buff_xsk *pos, *tmp;
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if (likely(!xdp_buff_has_frags(xdp)))
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goto out;
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list_for_each_entry_safe(pos, tmp, xskb_list, xskb_list_node) {
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list_del(&pos->xskb_list_node);
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xp_free(pos);
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}
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xdp_get_shared_info_from_buff(xdp)->nr_frags = 0;
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out:
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xp_free(xskb);
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}
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static inline void xsk_buff_add_frag(struct xdp_buff *xdp)
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{
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struct xdp_buff_xsk *frag = container_of(xdp, struct xdp_buff_xsk, xdp);
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list_add_tail(&frag->xskb_list_node, &frag->pool->xskb_list);
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}
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static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first)
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{
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struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp);
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struct xdp_buff *ret = NULL;
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struct xdp_buff_xsk *frag;
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frag = list_first_entry_or_null(&xskb->pool->xskb_list,
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struct xdp_buff_xsk, xskb_list_node);
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if (frag) {
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list_del(&frag->xskb_list_node);
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ret = &frag->xdp;
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}
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return ret;
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}
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static inline void xsk_buff_del_tail(struct xdp_buff *tail)
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{
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struct xdp_buff_xsk *xskb = container_of(tail, struct xdp_buff_xsk, xdp);
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list_del(&xskb->xskb_list_node);
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}
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static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first)
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{
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struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp);
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struct xdp_buff_xsk *frag;
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frag = list_last_entry(&xskb->pool->xskb_list, struct xdp_buff_xsk,
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xskb_list_node);
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return &frag->xdp;
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}
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static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
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{
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xdp->data = xdp->data_hard_start + XDP_PACKET_HEADROOM;
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xdp->data_meta = xdp->data;
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xdp->data_end = xdp->data + size;
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xdp->flags = 0;
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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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#define XDP_TXMD_FLAGS_VALID ( \
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XDP_TXMD_FLAGS_TIMESTAMP | \
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XDP_TXMD_FLAGS_CHECKSUM | \
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0)
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static inline bool xsk_buff_valid_tx_metadata(struct xsk_tx_metadata *meta)
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{
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return !(meta->flags & ~XDP_TXMD_FLAGS_VALID);
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}
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static inline struct xsk_tx_metadata *xsk_buff_get_metadata(struct xsk_buff_pool *pool, u64 addr)
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{
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struct xsk_tx_metadata *meta;
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if (!pool->tx_metadata_len)
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return NULL;
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meta = xp_raw_get_data(pool, addr) - pool->tx_metadata_len;
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if (unlikely(!xsk_buff_valid_tx_metadata(meta)))
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return NULL; /* no way to signal the error to the user */
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return meta;
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}
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static inline void xsk_buff_dma_sync_for_cpu(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_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, 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_fill_cb(struct xsk_buff_pool *pool,
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struct xsk_cb_desc *desc)
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{
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}
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static inline unsigned int xsk_pool_get_napi_id(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_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_is_eop_desc(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_buff_alloc_batch(struct xsk_buff_pool *pool, struct xdp_buff **xdp, u32 max)
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{
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return 0;
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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 void xsk_buff_add_frag(struct xdp_buff *xdp)
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{
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}
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static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first)
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{
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return NULL;
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}
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static inline void xsk_buff_del_tail(struct xdp_buff *tail)
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{
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}
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static inline struct xdp_buff *xsk_buff_get_tail(struct xdp_buff *first)
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{
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return NULL;
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}
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static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
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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 bool xsk_buff_valid_tx_metadata(struct xsk_tx_metadata *meta)
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{
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return false;
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}
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static inline struct xsk_tx_metadata *xsk_buff_get_metadata(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)
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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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