Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Common code for low-level network console, dump, and debugger code | |
4 | * | |
5 | * Derived from netconsole, kgdb-over-ethernet, and netdump patches | |
6 | */ | |
7 | ||
8 | #ifndef _LINUX_NETPOLL_H | |
9 | #define _LINUX_NETPOLL_H | |
10 | ||
11 | #include <linux/netdevice.h> | |
12 | #include <linux/interrupt.h> | |
53fb95d3 | 13 | #include <linux/rcupdate.h> |
1da177e4 | 14 | #include <linux/list.h> |
433cea4d | 15 | #include <linux/refcount.h> |
1da177e4 | 16 | |
b7394d24 CW |
17 | union inet_addr { |
18 | __u32 all[4]; | |
19 | __be32 ip; | |
20 | __be32 ip6[4]; | |
21 | struct in_addr in; | |
22 | struct in6_addr in6; | |
23 | }; | |
24 | ||
1da177e4 LT |
25 | struct netpoll { |
26 | struct net_device *dev; | |
5fa5ae60 | 27 | netdevice_tracker dev_tracker; |
bf6bce71 SH |
28 | char dev_name[IFNAMSIZ]; |
29 | const char *name; | |
5de4a473 | 30 | |
b7394d24 CW |
31 | union inet_addr local_ip, remote_ip; |
32 | bool ipv6; | |
1da177e4 | 33 | u16 local_port, remote_port; |
09538641 | 34 | u8 remote_mac[ETH_ALEN]; |
115c1d6e JM |
35 | }; |
36 | ||
37 | struct netpoll_info { | |
433cea4d | 38 | refcount_t refcnt; |
508e14b4 | 39 | |
bd7c4b60 | 40 | struct semaphore dev_lock; |
508e14b4 | 41 | |
b6cd27ed | 42 | struct sk_buff_head txq; |
508e14b4 | 43 | |
6d5aefb8 | 44 | struct delayed_work tx_work; |
0e34e931 WC |
45 | |
46 | struct netpoll *netpoll; | |
38e6bc18 | 47 | struct rcu_head rcu; |
1da177e4 LT |
48 | }; |
49 | ||
ca99ca14 | 50 | #ifdef CONFIG_NETPOLL |
ac3d9dd0 ED |
51 | void netpoll_poll_dev(struct net_device *dev); |
52 | void netpoll_poll_disable(struct net_device *dev); | |
53 | void netpoll_poll_enable(struct net_device *dev); | |
ca99ca14 | 54 | #else |
66b5552f EB |
55 | static inline void netpoll_poll_disable(struct net_device *dev) { return; } |
56 | static inline void netpoll_poll_enable(struct net_device *dev) { return; } | |
ca99ca14 NH |
57 | #endif |
58 | ||
1da177e4 | 59 | void netpoll_send_udp(struct netpoll *np, const char *msg, int len); |
0bcc1816 | 60 | void netpoll_print_options(struct netpoll *np); |
1da177e4 | 61 | int netpoll_parse_options(struct netpoll *np, char *opt); |
a8779ec1 | 62 | int __netpoll_setup(struct netpoll *np, struct net_device *ndev); |
1da177e4 | 63 | int netpoll_setup(struct netpoll *np); |
8fdd95ec | 64 | void __netpoll_cleanup(struct netpoll *np); |
c9fbd71f | 65 | void __netpoll_free(struct netpoll *np); |
1da177e4 | 66 | void netpoll_cleanup(struct netpoll *np); |
1ddabdfa | 67 | netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb); |
c2355e1a | 68 | |
e1bd4d3d | 69 | #ifdef CONFIG_NETPOLL |
bea3348e SH |
70 | static inline void *netpoll_poll_lock(struct napi_struct *napi) |
71 | { | |
72 | struct net_device *dev = napi->dev; | |
73 | ||
bea3348e | 74 | if (dev && dev->npinfo) { |
89c4b442 ED |
75 | int owner = smp_processor_id(); |
76 | ||
77 | while (cmpxchg(&napi->poll_owner, -1, owner) != -1) | |
78 | cpu_relax(); | |
79 | ||
bea3348e | 80 | return napi; |
1da177e4 | 81 | } |
53fb95d3 | 82 | return NULL; |
1da177e4 LT |
83 | } |
84 | ||
53fb95d3 | 85 | static inline void netpoll_poll_unlock(void *have) |
1da177e4 | 86 | { |
bea3348e | 87 | struct napi_struct *napi = have; |
53fb95d3 | 88 | |
89c4b442 ED |
89 | if (napi) |
90 | smp_store_release(&napi->poll_owner, -1); | |
1da177e4 LT |
91 | } |
92 | ||
77ab8a54 | 93 | static inline bool netpoll_tx_running(struct net_device *dev) |
c18370f5 HX |
94 | { |
95 | return irqs_disabled(); | |
96 | } | |
97 | ||
1da177e4 | 98 | #else |
bea3348e SH |
99 | static inline void *netpoll_poll_lock(struct napi_struct *napi) |
100 | { | |
101 | return NULL; | |
102 | } | |
103 | static inline void netpoll_poll_unlock(void *have) | |
104 | { | |
105 | } | |
77ab8a54 | 106 | static inline bool netpoll_tx_running(struct net_device *dev) |
c18370f5 | 107 | { |
77ab8a54 | 108 | return false; |
c18370f5 | 109 | } |
1da177e4 LT |
110 | #endif |
111 | ||
112 | #endif |