| 1 | /* |
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| 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 | /** |
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| 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 | /** |
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| 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 | /** |
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| 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 /* ifdef CONFIG_DVB_NET */ |
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| 94 | |
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| 95 | #endif |
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| 96 | |
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