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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/netpoll.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Common code for low-level network console, dump, and debugger code
5 * Derived from netconsole, kgdb-over-ethernet, and netdump patches
8 #ifndef _LINUX_NETPOLL_H
9 #define _LINUX_NETPOLL_H
11 #include <linux/netdevice.h>
12 #include <linux/interrupt.h>
13 #include <linux/rcupdate.h>
14 #include <linux/list.h>
15 #include <linux/refcount.h>
26 struct net_device
*dev
;
27 char dev_name
[IFNAMSIZ
];
30 union inet_addr local_ip
, remote_ip
;
32 u16 local_port
, remote_port
;
33 u8 remote_mac
[ETH_ALEN
];
39 struct semaphore dev_lock
;
41 struct sk_buff_head txq
;
43 struct delayed_work tx_work
;
45 struct netpoll
*netpoll
;
50 void netpoll_poll_dev(struct net_device
*dev
);
51 void netpoll_poll_disable(struct net_device
*dev
);
52 void netpoll_poll_enable(struct net_device
*dev
);
54 static inline void netpoll_poll_disable(struct net_device
*dev
) { return; }
55 static inline void netpoll_poll_enable(struct net_device
*dev
) { return; }
58 void netpoll_send_udp(struct netpoll
*np
, const char *msg
, int len
);
59 void netpoll_print_options(struct netpoll
*np
);
60 int netpoll_parse_options(struct netpoll
*np
, char *opt
);
61 int __netpoll_setup(struct netpoll
*np
, struct net_device
*ndev
);
62 int netpoll_setup(struct netpoll
*np
);
63 void __netpoll_cleanup(struct netpoll
*np
);
64 void __netpoll_free(struct netpoll
*np
);
65 void netpoll_cleanup(struct netpoll
*np
);
66 void netpoll_send_skb_on_dev(struct netpoll
*np
, struct sk_buff
*skb
,
67 struct net_device
*dev
);
68 static inline void netpoll_send_skb(struct netpoll
*np
, struct sk_buff
*skb
)
71 local_irq_save(flags
);
72 netpoll_send_skb_on_dev(np
, skb
, np
->dev
);
73 local_irq_restore(flags
);
77 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
79 struct net_device
*dev
= napi
->dev
;
81 if (dev
&& dev
->npinfo
) {
82 int owner
= smp_processor_id();
84 while (cmpxchg(&napi
->poll_owner
, -1, owner
) != -1)
92 static inline void netpoll_poll_unlock(void *have
)
94 struct napi_struct
*napi
= have
;
97 smp_store_release(&napi
->poll_owner
, -1);
100 static inline bool netpoll_tx_running(struct net_device
*dev
)
102 return irqs_disabled();
106 static inline void *netpoll_poll_lock(struct napi_struct
*napi
)
110 static inline void netpoll_poll_unlock(void *have
)
113 static inline void netpoll_netdev_init(struct net_device
*dev
)
116 static inline bool netpoll_tx_running(struct net_device
*dev
)