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