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 25 struct 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 50 struct 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 */ 67 int 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 */ 75 void dvb_net_release(struct dvb_net *dvbnet); 76 77 #else 78 79 struct dvb_net { 80 struct dvb_device *dvbdev; 81 }; 82 83 static inline void dvb_net_release(struct dvb_net *dvbnet) 84 { 85 } 86 87 static 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 96