OpenCores
URL https://opencores.org/ocsvn/test_project/test_project/trunk

Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [netpoll.h] - Blame information for rev 81

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 62 marcus.erl
/*
2
 * Common code for low-level network console, dump, and debugger code
3
 *
4
 * Derived from netconsole, kgdb-over-ethernet, and netdump patches
5
 */
6
 
7
#ifndef _LINUX_NETPOLL_H
8
#define _LINUX_NETPOLL_H
9
 
10
#include <linux/netdevice.h>
11
#include <linux/interrupt.h>
12
#include <linux/rcupdate.h>
13
#include <linux/list.h>
14
 
15
struct netpoll {
16
        struct net_device *dev;
17
        char dev_name[IFNAMSIZ];
18
        const char *name;
19
        void (*rx_hook)(struct netpoll *, int, char *, int);
20
 
21
        u32 local_ip, remote_ip;
22
        u16 local_port, remote_port;
23
        u8 local_mac[ETH_ALEN], remote_mac[ETH_ALEN];
24
};
25
 
26
struct netpoll_info {
27
        atomic_t refcnt;
28
        int rx_flags;
29
        spinlock_t rx_lock;
30
        struct netpoll *rx_np; /* netpoll that registered an rx_hook */
31
        struct sk_buff_head arp_tx; /* list of arp requests to reply to */
32
        struct sk_buff_head txq;
33
        struct delayed_work tx_work;
34
};
35
 
36
void netpoll_poll(struct netpoll *np);
37
void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
38
void netpoll_print_options(struct netpoll *np);
39
int netpoll_parse_options(struct netpoll *np, char *opt);
40
int netpoll_setup(struct netpoll *np);
41
int netpoll_trap(void);
42
void netpoll_set_trap(int trap);
43
void netpoll_cleanup(struct netpoll *np);
44
int __netpoll_rx(struct sk_buff *skb);
45
 
46
 
47
#ifdef CONFIG_NETPOLL
48
static inline int netpoll_rx(struct sk_buff *skb)
49
{
50
        struct netpoll_info *npinfo = skb->dev->npinfo;
51
        unsigned long flags;
52
        int ret = 0;
53
 
54
        if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags))
55
                return 0;
56
 
57
        spin_lock_irqsave(&npinfo->rx_lock, flags);
58
        /* check rx_flags again with the lock held */
59
        if (npinfo->rx_flags && __netpoll_rx(skb))
60
                ret = 1;
61
        spin_unlock_irqrestore(&npinfo->rx_lock, flags);
62
 
63
        return ret;
64
}
65
 
66
static inline int netpoll_receive_skb(struct sk_buff *skb)
67
{
68
        if (!list_empty(&skb->dev->napi_list))
69
                return netpoll_rx(skb);
70
        return 0;
71
}
72
 
73
static inline void *netpoll_poll_lock(struct napi_struct *napi)
74
{
75
        struct net_device *dev = napi->dev;
76
 
77
        rcu_read_lock(); /* deal with race on ->npinfo */
78
        if (dev && dev->npinfo) {
79
                spin_lock(&napi->poll_lock);
80
                napi->poll_owner = smp_processor_id();
81
                return napi;
82
        }
83
        return NULL;
84
}
85
 
86
static inline void netpoll_poll_unlock(void *have)
87
{
88
        struct napi_struct *napi = have;
89
 
90
        if (napi) {
91
                napi->poll_owner = -1;
92
                spin_unlock(&napi->poll_lock);
93
        }
94
        rcu_read_unlock();
95
}
96
 
97
static inline void netpoll_netdev_init(struct net_device *dev)
98
{
99
        INIT_LIST_HEAD(&dev->napi_list);
100
}
101
 
102
#else
103
static inline int netpoll_rx(struct sk_buff *skb)
104
{
105
        return 0;
106
}
107
static inline int netpoll_receive_skb(struct sk_buff *skb)
108
{
109
        return 0;
110
}
111
static inline void *netpoll_poll_lock(struct napi_struct *napi)
112
{
113
        return NULL;
114
}
115
static inline void netpoll_poll_unlock(void *have)
116
{
117
}
118
static inline void netpoll_netdev_init(struct net_device *dev)
119
{
120
}
121
#endif
122
 
123
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2025 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.