LXR linux/include/media/dvb

   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 *
  45 * Currently, the core supports up to %DVB_NET_DEVICES_MAX (10) network
  46 * devices.
  47 */
  48
  49struct dvb_net {
  50        struct dvb_device *dvbdev;
  51        struct net_device *device[DVB_NET_DEVICES_MAX];
  52        int state[DVB_NET_DEVICES_MAX];
  53        unsigned int exit:1;
  54        struct dmx_demux *demux;
  55        struct mutex ioctl_mutex;
  56};
  57
  58/**
  59 * dvb_net_init - nitializes a digital TV network device and registers it.
  60 *
  61 * @adap:       pointer to &struct dvb_adapter.
  62 * @dvbnet:     pointer to &struct dvb_net.
  63 * @dmxdemux:   pointer to &struct dmx_demux.
  64 */
  65int dvb_net_init(struct dvb_adapter *adap, struct dvb_net *dvbnet,
  66                  struct dmx_demux *dmxdemux);
  67
  68/**
  69 * dvb_net_release - releases a digital TV network device and unregisters it.
  70 *
  71 * @dvbnet:     pointer to &struct dvb_net.
  72 */
  73void dvb_net_release(struct dvb_net *dvbnet);
  74
  75#else
  76
  77struct dvb_net {
  78        struct dvb_device *dvbdev;
  79};
  80
  81static inline void dvb_net_release(struct dvb_net *dvbnet)
  82{
  83}
  84
  85static inline int dvb_net_init(struct dvb_adapter *adap,
  86                               struct dvb_net *dvbnet, struct dmx_demux *dmx)
  87{
  88        return 0;
  89}
  90
  91#endif /* ifdef CONFIG_DVB_NET */
  92
  93#endif
  94