1 /*
2  * dvb_net.h
3  *
4  * Copyright (C) 2001 Ralph Metzler for convergence integrated media GmbH
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public License
8  * as published by the Free Software Foundation; either version 2.1
9  * of the License, or (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  */
17 
18 #ifndef _DVB_NET_H_
19 #define _DVB_NET_H_
20 
21 #include <linux/module.h>
22 #include <linux/netdevice.h>
23 #include <linux/inetdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/skbuff.h>
26 
27 #include <media/dvbdev.h>
28 
29 #define DVB_NET_DEVICES_MAX 10
30 
31 #ifdef CONFIG_DVB_NET
32 
33 /**
34  * struct dvb_net - describes a DVB network interface
35  *
36  * @dvbdev:		pointer to &struct dvb_device.
37  * @device:		array of pointers to &struct net_device.
38  * @state:		array of integers to each net device. A value
39  *			different than zero means that the interface is
40  *			in usage.
41  * @exit:		flag to indicate when the device is being removed.
42  * @demux:		pointer to &struct dmx_demux.
43  * @ioctl_mutex:	protect access to this struct.
44  * @remove_mutex:	mutex that avoids a race condition between a callback
45  *			called when the hardware is disconnected and the
46  *			file_operations of dvb_net.
47  *
48  * Currently, the core supports up to %DVB_NET_DEVICES_MAX (10) network
49  * devices.
50  */
51 
52 struct dvb_net {
53 	struct dvb_device *dvbdev;
54 	struct net_device *device[DVB_NET_DEVICES_MAX];
55 	int state[DVB_NET_DEVICES_MAX];
56 	unsigned int exit:1;
57 	struct dmx_demux *demux;
58 	struct mutex ioctl_mutex;
59 	struct mutex remove_mutex;
60 };
61 
62 /**
63  * dvb_net_init - nitializes a digital TV network device and registers it.
64  *
65  * @adap:	pointer to &struct dvb_adapter.
66  * @dvbnet:	pointer to &struct dvb_net.
67  * @dmxdemux:	pointer to &struct dmx_demux.
68  */
69 int dvb_net_init(struct dvb_adapter *adap, struct dvb_net *dvbnet,
70 		  struct dmx_demux *dmxdemux);
71 
72 /**
73  * dvb_net_release - releases a digital TV network device and unregisters it.
74  *
75  * @dvbnet:	pointer to &struct dvb_net.
76  */
77 void dvb_net_release(struct dvb_net *dvbnet);
78 
79 #else
80 
81 struct dvb_net {
82 	struct dvb_device *dvbdev;
83 };
84 
dvb_net_release(struct dvb_net * dvbnet)85 static inline void dvb_net_release(struct dvb_net *dvbnet)
86 {
87 }
88 
dvb_net_init(struct dvb_adapter * adap,struct dvb_net * dvbnet,struct dmx_demux * dmx)89 static inline int dvb_net_init(struct dvb_adapter *adap,
90 			       struct dvb_net *dvbnet, struct dmx_demux *dmx)
91 {
92 	return 0;
93 }
94 
95 #endif /* ifdef CONFIG_DVB_NET */
96 
97 #endif
98