Linux 4.6-rc6
[cris-mirror.git] / include / linux / netpoll.h
blobb25ee9ffdbe67e06a5c70305360cceea3de43aef
1 /*
2 * Common code for low-level network console, dump, and debugger code
4 * Derived from netconsole, kgdb-over-ethernet, and netdump patches
5 */
7 #ifndef _LINUX_NETPOLL_H
8 #define _LINUX_NETPOLL_H
10 #include <linux/netdevice.h>
11 #include <linux/interrupt.h>
12 #include <linux/rcupdate.h>
13 #include <linux/list.h>
15 union inet_addr {
16 __u32 all[4];
17 __be32 ip;
18 __be32 ip6[4];
19 struct in_addr in;
20 struct in6_addr in6;
23 struct netpoll {
24 struct net_device *dev;
25 char dev_name[IFNAMSIZ];
26 const char *name;
28 union inet_addr local_ip, remote_ip;
29 bool ipv6;
30 u16 local_port, remote_port;
31 u8 remote_mac[ETH_ALEN];
33 struct work_struct cleanup_work;
36 struct netpoll_info {
37 atomic_t refcnt;
39 struct semaphore dev_lock;
41 struct sk_buff_head txq;
43 struct delayed_work tx_work;
45 struct netpoll *netpoll;
46 struct rcu_head rcu;
49 #ifdef CONFIG_NETPOLL
50 extern void netpoll_poll_disable(struct net_device *dev);
51 extern void netpoll_poll_enable(struct net_device *dev);
52 #else
53 static inline void netpoll_poll_disable(struct net_device *dev) { return; }
54 static inline void netpoll_poll_enable(struct net_device *dev) { return; }
55 #endif
57 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
58 void netpoll_print_options(struct netpoll *np);
59 int netpoll_parse_options(struct netpoll *np, char *opt);
60 int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
61 int netpoll_setup(struct netpoll *np);
62 void __netpoll_cleanup(struct netpoll *np);
63 void __netpoll_free_async(struct netpoll *np);
64 void netpoll_cleanup(struct netpoll *np);
65 void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
66 struct net_device *dev);
67 static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
69 unsigned long flags;
70 local_irq_save(flags);
71 netpoll_send_skb_on_dev(np, skb, np->dev);
72 local_irq_restore(flags);
75 #ifdef CONFIG_NETPOLL
76 static inline void *netpoll_poll_lock(struct napi_struct *napi)
78 struct net_device *dev = napi->dev;
80 if (dev && dev->npinfo) {
81 spin_lock(&napi->poll_lock);
82 napi->poll_owner = smp_processor_id();
83 return napi;
85 return NULL;
88 static inline void netpoll_poll_unlock(void *have)
90 struct napi_struct *napi = have;
92 if (napi) {
93 napi->poll_owner = -1;
94 spin_unlock(&napi->poll_lock);
98 static inline bool netpoll_tx_running(struct net_device *dev)
100 return irqs_disabled();
103 #else
104 static inline void *netpoll_poll_lock(struct napi_struct *napi)
106 return NULL;
108 static inline void netpoll_poll_unlock(void *have)
111 static inline void netpoll_netdev_init(struct net_device *dev)
114 static inline bool netpoll_tx_running(struct net_device *dev)
116 return false;
118 #endif
120 #endif