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https://github.com/edk2-porting/linux-next.git
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ac98d8aab6
Here we add the functionality required to support zero-copy Tx, and also exposes various zero-copy related functions for the netdevs. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* AF_XDP internal functions
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* Copyright(c) 2018 Intel Corporation.
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*/
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#ifndef _LINUX_XDP_SOCK_H
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#define _LINUX_XDP_SOCK_H
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#include <linux/workqueue.h>
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#include <linux/if_xdp.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <net/sock.h>
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struct net_device;
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struct xsk_queue;
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struct xdp_umem_props {
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u64 chunk_mask;
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u64 size;
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};
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struct xdp_umem_page {
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void *addr;
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dma_addr_t dma;
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};
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struct xdp_umem {
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struct xsk_queue *fq;
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struct xsk_queue *cq;
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struct xdp_umem_page *pages;
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struct xdp_umem_props props;
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u32 headroom;
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u32 chunk_size_nohr;
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struct user_struct *user;
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struct pid *pid;
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unsigned long address;
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refcount_t users;
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struct work_struct work;
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struct page **pgs;
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u32 npgs;
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struct net_device *dev;
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u16 queue_id;
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bool zc;
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spinlock_t xsk_list_lock;
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struct list_head xsk_list;
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};
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struct xdp_sock {
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/* struct sock must be the first member of struct xdp_sock */
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struct sock sk;
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struct xsk_queue *rx;
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struct net_device *dev;
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struct xdp_umem *umem;
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struct list_head flush_node;
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u16 queue_id;
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struct xsk_queue *tx ____cacheline_aligned_in_smp;
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struct list_head list;
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bool zc;
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/* Protects multiple processes in the control path */
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struct mutex mutex;
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u64 rx_dropped;
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};
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struct xdp_buff;
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#ifdef CONFIG_XDP_SOCKETS
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int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
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int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
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void xsk_flush(struct xdp_sock *xs);
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bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
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/* Used from netdev driver */
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u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
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void xsk_umem_discard_addr(struct xdp_umem *umem);
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void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
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bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma, u32 *len);
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void xsk_umem_consume_tx_done(struct xdp_umem *umem);
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#else
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static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
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{
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return -ENOTSUPP;
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}
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static inline int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
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{
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return -ENOTSUPP;
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}
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static inline void xsk_flush(struct xdp_sock *xs)
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{
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}
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static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
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{
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return false;
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}
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#endif /* CONFIG_XDP_SOCKETS */
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#endif /* _LINUX_XDP_SOCK_H */
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