mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 20:16:43 +07:00
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 */
|
|
/* AF_XDP internal functions
|
|
* Copyright(c) 2018 Intel Corporation.
|
|
*/
|
|
|
|
#ifndef _LINUX_XDP_SOCK_H
|
|
#define _LINUX_XDP_SOCK_H
|
|
|
|
#include <linux/workqueue.h>
|
|
#include <linux/if_xdp.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mm.h>
|
|
#include <net/sock.h>
|
|
|
|
struct net_device;
|
|
struct xsk_queue;
|
|
|
|
struct xdp_umem_props {
|
|
u64 chunk_mask;
|
|
u64 size;
|
|
};
|
|
|
|
struct xdp_umem_page {
|
|
void *addr;
|
|
dma_addr_t dma;
|
|
};
|
|
|
|
struct xdp_umem {
|
|
struct xsk_queue *fq;
|
|
struct xsk_queue *cq;
|
|
struct xdp_umem_page *pages;
|
|
struct xdp_umem_props props;
|
|
u32 headroom;
|
|
u32 chunk_size_nohr;
|
|
struct user_struct *user;
|
|
struct pid *pid;
|
|
unsigned long address;
|
|
refcount_t users;
|
|
struct work_struct work;
|
|
struct page **pgs;
|
|
u32 npgs;
|
|
struct net_device *dev;
|
|
u16 queue_id;
|
|
bool zc;
|
|
spinlock_t xsk_list_lock;
|
|
struct list_head xsk_list;
|
|
};
|
|
|
|
struct xdp_sock {
|
|
/* struct sock must be the first member of struct xdp_sock */
|
|
struct sock sk;
|
|
struct xsk_queue *rx;
|
|
struct net_device *dev;
|
|
struct xdp_umem *umem;
|
|
struct list_head flush_node;
|
|
u16 queue_id;
|
|
struct xsk_queue *tx ____cacheline_aligned_in_smp;
|
|
struct list_head list;
|
|
bool zc;
|
|
/* Protects multiple processes in the control path */
|
|
struct mutex mutex;
|
|
u64 rx_dropped;
|
|
};
|
|
|
|
struct xdp_buff;
|
|
#ifdef CONFIG_XDP_SOCKETS
|
|
int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
|
|
int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp);
|
|
void xsk_flush(struct xdp_sock *xs);
|
|
bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
|
|
/* Used from netdev driver */
|
|
u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
|
|
void xsk_umem_discard_addr(struct xdp_umem *umem);
|
|
void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
|
|
bool xsk_umem_consume_tx(struct xdp_umem *umem, dma_addr_t *dma, u32 *len);
|
|
void xsk_umem_consume_tx_done(struct xdp_umem *umem);
|
|
#else
|
|
static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline void xsk_flush(struct xdp_sock *xs)
|
|
{
|
|
}
|
|
|
|
static inline bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_XDP_SOCKETS */
|
|
|
|
#endif /* _LINUX_XDP_SOCK_H */
|