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
23#include <media/dvbdev.h>
24
25struct net_device;
26
27#define DVB_NET_DEVICES_MAX 10
28
29#ifdef CONFIG_DVB_NET
30
31/**
32 * struct dvb_net - describes a DVB network interface
33 *
34 * @dvbdev:		pointer to &struct dvb_device.
35 * @device:		array of pointers to &struct net_device.
36 * @state:		array of integers to each net device. A value
37 *			different than zero means that the interface is
38 *			in usage.
39 * @exit:		flag to indicate when the device is being removed.
40 * @demux:		pointer to &struct dmx_demux.
41 * @ioctl_mutex:	protect access to this struct.
42 * @remove_mutex:	mutex that avoids a race condition between a callback
43 *			called when the hardware is disconnected and the
44 *			file_operations of dvb_net.
45 *
46 * Currently, the core supports up to %DVB_NET_DEVICES_MAX (10) network
47 * devices.
48 */
49
50struct dvb_net {
51	struct dvb_device *dvbdev;
52	struct net_device *device[DVB_NET_DEVICES_MAX];
53	int state[DVB_NET_DEVICES_MAX];
54	unsigned int exit:1;
55	struct dmx_demux *demux;
56	struct mutex ioctl_mutex;
57	struct mutex remove_mutex;
58};
59
60/**
61 * dvb_net_init - nitializes a digital TV network device and registers it.
62 *
63 * @adap:	pointer to &struct dvb_adapter.
64 * @dvbnet:	pointer to &struct dvb_net.
65 * @dmxdemux:	pointer to &struct dmx_demux.
66 */
67int dvb_net_init(struct dvb_adapter *adap, struct dvb_net *dvbnet,
68		  struct dmx_demux *dmxdemux);
69
70/**
71 * dvb_net_release - releases a digital TV network device and unregisters it.
72 *
73 * @dvbnet:	pointer to &struct dvb_net.
74 */
75void dvb_net_release(struct dvb_net *dvbnet);
76
77#else
78
79struct dvb_net {
80	struct dvb_device *dvbdev;
81};
82
83static inline void dvb_net_release(struct dvb_net *dvbnet)
84{
85}
86
87static inline int dvb_net_init(struct dvb_adapter *adap,
88			       struct dvb_net *dvbnet, struct dmx_demux *dmx)
89{
90	return 0;
91}
92
93#endif /* ifdef CONFIG_DVB_NET */
94
95#endif