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];
35 struct work_struct cleanup_work;
41 struct semaphore dev_lock;
43 struct sk_buff_head txq;
45 struct delayed_work tx_work;
47 struct netpoll *netpoll;
52 void netpoll_poll_dev(struct net_device *dev);
53 void netpoll_poll_disable(struct net_device *dev);
54 void netpoll_poll_enable(struct net_device *dev);
56 static inline void netpoll_poll_disable(struct net_device *dev) { return; }
57 static inline void netpoll_poll_enable(struct net_device *dev) { return; }
60 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
61 void netpoll_print_options(struct netpoll *np);
62 int netpoll_parse_options(struct netpoll *np, char *opt);
63 int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
64 int netpoll_setup(struct netpoll *np);
65 void __netpoll_cleanup(struct netpoll *np);
66 void __netpoll_free_async(struct netpoll *np);
67 void netpoll_cleanup(struct netpoll *np);
68 void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
69 struct net_device *dev);
70 static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
73 local_irq_save(flags);
74 netpoll_send_skb_on_dev(np, skb, np->dev);
75 local_irq_restore(flags);
79 static inline void *netpoll_poll_lock(struct napi_struct *napi)
81 struct net_device *dev = napi->dev;
83 if (dev && dev->npinfo) {
84 int owner = smp_processor_id();
86 while (cmpxchg(&napi->poll_owner, -1, owner) != -1)
94 static inline void netpoll_poll_unlock(void *have)
96 struct napi_struct *napi = have;
99 smp_store_release(&napi->poll_owner, -1);
102 static inline bool netpoll_tx_running(struct net_device *dev)
104 return irqs_disabled();
108 static inline void *netpoll_poll_lock(struct napi_struct *napi)
112 static inline void netpoll_poll_unlock(void *have)
115 static inline void netpoll_netdev_init(struct net_device *dev)
118 static inline bool netpoll_tx_running(struct net_device *dev)