Release 4.11 drivers/media/dvb-core/dmxdev.c

/*
 * dmxdev.c - DVB demultiplexer device
 *
 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
 *                    for convergence integrated media GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */


#define pr_fmt(fmt) "dmxdev: " fmt

#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <linux/ioctl.h>
#include <linux/wait.h>
#include <linux/uaccess.h>
#include "dmxdev.h"


static int debug;

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");


#define dprintk(fmt, arg...) do {                                    \
        if (debug)                                                      \
                printk(KERN_DEBUG pr_fmt("%s: " fmt),                   \
                        __func__, ##arg);                               \
} while (0)



static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
				   const u8 *src, size_t len)
{
	ssize_t free;

	if (!len)
		return 0;
	if (!buf->data)
		return 0;

	free = dvb_ringbuffer_free(buf);
	if (len > free) {
		dprintk("buffer overflow\n");
		return -EOVERFLOW;
	}

	return dvb_ringbuffer_write(buf, src, len);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
61
82.43%
3
50.00%
Andreas Oberritter
11
14.86%
1
16.67%
Michael Hunold
1
1.35%
1
16.67%
Mauro Carvalho Chehab
1
1.35%
1
16.67%
Total
74
100.00%
6
100.00%



static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
				      int non_blocking, char __user *buf,
				      size_t count, loff_t *ppos)
{
	size_t todo;
	ssize_t avail;
	ssize_t ret = 0;

	if (!src->data)
		return 0;

	if (src->error) {
		ret = src->error;
		dvb_ringbuffer_flush(src);
		return ret;
	}

	for (todo = count; todo > 0; todo -= ret) {
		if (non_blocking && dvb_ringbuffer_empty(src)) {
			ret = -EWOULDBLOCK;
			break;
		}

		ret = wait_event_interruptible(src->queue,
					       !dvb_ringbuffer_empty(src) ||
					       (src->error != 0));
		if (ret < 0)
			break;

		if (src->error) {
			ret = src->error;
			dvb_ringbuffer_flush(src);
			break;
		}

		avail = dvb_ringbuffer_avail(src);
		if (avail > todo)
			avail = todo;

		ret = dvb_ringbuffer_read_user(src, buf, avail);
		if (ret < 0)
			break;

		buf += ret;
	}

	return (count - todo) ? (count - todo) : ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
112
54.37%
2
33.33%
Andreas Oberritter
91
44.17%
1
16.67%
Al Viro
2
0.97%
2
33.33%
Michael Hunold
1
0.49%
1
16.67%
Total
206
100.00%
6
100.00%



static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
{
	struct list_head *head, *pos;

	head = demux->get_frontends(demux);
	if (!head)
		return NULL;
	list_for_each(pos, head)
		if (DMX_FE_ENTRY(pos)->source == type)
			return DMX_FE_ENTRY(pos);

	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
61
91.04%
1
33.33%
Michael Hunold
4
5.97%
1
33.33%
Al Viro
2
2.99%
1
33.33%
Total
67
100.00%
3
100.00%



static int dvb_dvr_open(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;
	struct dmx_frontend *front;

	dprintk("%s\n", __func__);

	if (mutex_lock_interruptible(&dmxdev->mutex))
		return -ERESTARTSYS;

	if (dmxdev->exit) {
		mutex_unlock(&dmxdev->mutex);
		return -ENODEV;
	}

	if ((file->f_flags & O_ACCMODE) == O_RDWR) {
		if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
			mutex_unlock(&dmxdev->mutex);
			return -EOPNOTSUPP;
		}
	}

	if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
		void *mem;

		if (!dvbdev->readers) {
			mutex_unlock(&dmxdev->mutex);
			return -EBUSY;
		}
		mem = vmalloc(DVR_BUFFER_SIZE);
		if (!mem) {
			mutex_unlock(&dmxdev->mutex);
			return -ENOMEM;
		}
		dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
		dvbdev->readers--;
	}

	if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
		dmxdev->dvr_orig_fe = dmxdev->demux->frontend;

		if (!dmxdev->demux->write) {
			mutex_unlock(&dmxdev->mutex);
			return -EOPNOTSUPP;
		}

		front = get_fe(dmxdev->demux, DMX_MEMORY_FE);

		if (!front) {
			mutex_unlock(&dmxdev->mutex);
			return -EINVAL;
		}
		dmxdev->demux->disconnect_frontend(dmxdev->demux);
		dmxdev->demux->connect_frontend(dmxdev->demux, front);
	}
	dvbdev->users++;
	mutex_unlock(&dmxdev->mutex);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
235
73.90%
2
22.22%
Trent Piepho
30
9.43%
1
11.11%
Markus Rechberger
25
7.86%
1
11.11%
Andreas Oberritter
16
5.03%
1
11.11%
Ingo Molnar
6
1.89%
1
11.11%
Michael Hunold
4
1.26%
1
11.11%
Mauro Carvalho Chehab
1
0.31%
1
11.11%
Harvey Harrison
1
0.31%
1
11.11%
Total
318
100.00%
9
100.00%



static int dvb_dvr_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;

	mutex_lock(&dmxdev->mutex);

	if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
		dmxdev->demux->disconnect_frontend(dmxdev->demux);
		dmxdev->demux->connect_frontend(dmxdev->demux,
						dmxdev->dvr_orig_fe);
	}
	if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
		dvbdev->readers++;
		if (dmxdev->dvr_buffer.data) {
			void *mem = dmxdev->dvr_buffer.data;
			/*memory barrier*/
			mb();
			spin_lock_irq(&dmxdev->lock);
			dmxdev->dvr_buffer.data = NULL;
			spin_unlock_irq(&dmxdev->lock);
			vfree(mem);
		}
	}
	/* TODO */
	dvbdev->users--;
	if (dvbdev->users == 1 && dmxdev->exit == 1) {
		mutex_unlock(&dmxdev->mutex);
		wake_up(&dvbdev->wait_queue);
	} else
		mutex_unlock(&dmxdev->mutex);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
153
75.00%
2
22.22%
Markus Rechberger
39
19.12%
1
11.11%
Trent Piepho
5
2.45%
1
11.11%
Simon Arlott
2
0.98%
1
11.11%
Michael Hunold
2
0.98%
1
11.11%
Ingo Molnar
1
0.49%
1
11.11%
Al Viro
1
0.49%
1
11.11%
devendra sharma
1
0.49%
1
11.11%
Total
204
100.00%
9
100.00%



static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
			     size_t count, loff_t *ppos)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;
	int ret;

	if (!dmxdev->demux->write)
		return -EOPNOTSUPP;
	if ((file->f_flags & O_ACCMODE) != O_WRONLY)
		return -EINVAL;
	if (mutex_lock_interruptible(&dmxdev->mutex))
		return -ERESTARTSYS;

	if (dmxdev->exit) {
		mutex_unlock(&dmxdev->mutex);
		return -ENODEV;
	}
	ret = dmxdev->demux->write(dmxdev->demux, buf, count);
	mutex_unlock(&dmxdev->mutex);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
111
81.62%
2
33.33%
Markus Rechberger
20
14.71%
1
16.67%
Michael Hunold
2
1.47%
1
16.67%
Ingo Molnar
2
1.47%
1
16.67%
Al Viro
1
0.74%
1
16.67%
Total
136
100.00%
6
100.00%



static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
			    loff_t *ppos)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;

	if (dmxdev->exit)
		return -ENODEV;

	return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
				      file->f_flags & O_NONBLOCK,
				      buf, count, ppos);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
58
80.56%
2
33.33%
Markus Rechberger
10
13.89%
1
16.67%
Michael Hunold
2
2.78%
1
16.67%
Simon Arlott
1
1.39%
1
16.67%
Al Viro
1
1.39%
1
16.67%
Total
72
100.00%
6
100.00%



static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
				      unsigned long size)
{
	struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
	void *newmem;
	void *oldmem;

	dprintk("%s\n", __func__);

	if (buf->size == size)
		return 0;
	if (!size)
		return -EINVAL;

	newmem = vmalloc(size);
	if (!newmem)
		return -ENOMEM;

	oldmem = buf->data;

	spin_lock_irq(&dmxdev->lock);
	buf->data = newmem;
	buf->size = size;

	/* reset and not flush in case the buffer shrinks */
	dvb_ringbuffer_reset(buf);
	spin_unlock_irq(&dmxdev->lock);

	vfree(oldmem);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrea Odetti
123
99.19%
1
50.00%
Mauro Carvalho Chehab
1
0.81%
1
50.00%
Total
124
100.00%
2
100.00%



static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
					       *dmxdevfilter, int state)
{
	spin_lock_irq(&dmxdevfilter->dev->lock);
	dmxdevfilter->state = state;
	spin_unlock_irq(&dmxdevfilter->dev->lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
39
95.12%
2
66.67%
Michael Hunold
2
4.88%
1
33.33%
Total
41
100.00%
3
100.00%



static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
				      unsigned long size)
{
	struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
	void *newmem;
	void *oldmem;

	if (buf->size == size)
		return 0;
	if (!size)
		return -EINVAL;
	if (dmxdevfilter->state >= DMXDEV_STATE_GO)
		return -EBUSY;

	newmem = vmalloc(size);
	if (!newmem)
		return -ENOMEM;

	oldmem = buf->data;

	spin_lock_irq(&dmxdevfilter->dev->lock);
	buf->data = newmem;
	buf->size = size;

	/* reset and not flush in case the buffer shrinks */
	dvb_ringbuffer_reset(buf);
	spin_unlock_irq(&dmxdevfilter->dev->lock);

	vfree(oldmem);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
87
65.41%
2
33.33%
Andrea Odetti
40
30.08%
2
33.33%
Michael Hunold
3
2.26%
1
16.67%
Andreas Oberritter
3
2.26%
1
16.67%
Total
133
100.00%
6
100.00%



static void dvb_dmxdev_filter_timeout(unsigned long data)
{
	struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;

	dmxdevfilter->buffer.error = -ETIMEDOUT;
	spin_lock_irq(&dmxdevfilter->dev->lock);
	dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
	spin_unlock_irq(&dmxdevfilter->dev->lock);
	wake_up(&dmxdevfilter->buffer.queue);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
63
94.03%
2
66.67%
Michael Hunold
4
5.97%
1
33.33%
Total
67
100.00%
3
100.00%



static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
{
	struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;

	del_timer(&dmxdevfilter->timer);
	if (para->timeout) {
		dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
		dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
		dmxdevfilter->timer.expires =
		    jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
		add_timer(&dmxdevfilter->timer);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
89
97.80%
2
66.67%
Michael Hunold
2
2.20%
1
33.33%
Total
91
100.00%
3
100.00%



static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
				       const u8 *buffer2, size_t buffer2_len,
				       struct dmx_section_filter *filter)
{
	struct dmxdev_filter *dmxdevfilter = filter->priv;
	int ret;

	if (dmxdevfilter->buffer.error) {
		wake_up(&dmxdevfilter->buffer.queue);
		return 0;
	}
	spin_lock(&dmxdevfilter->dev->lock);
	if (dmxdevfilter->state != DMXDEV_STATE_GO) {
		spin_unlock(&dmxdevfilter->dev->lock);
		return 0;
	}
	del_timer(&dmxdevfilter->timer);
	dprintk("section callback %*ph\n", 6, buffer1);
	ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
				      buffer1_len);
	if (ret == buffer1_len) {
		ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
					      buffer2_len);
	}
	if (ret < 0)
		dmxdevfilter->buffer.error = ret;
	if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
		dmxdevfilter->state = DMXDEV_STATE_DONE;
	spin_unlock(&dmxdevfilter->dev->lock);
	wake_up(&dmxdevfilter->buffer.queue);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
193
95.07%
3
37.50%
Michael Hunold
4
1.97%
1
12.50%
Mauro Carvalho Chehab
4
1.97%
2
25.00%
Andreas Oberritter
1
0.49%
1
12.50%
Andy Shevchenko
1
0.49%
1
12.50%
Total
203
100.00%
8
100.00%



static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
				  const u8 *buffer2, size_t buffer2_len,
				  struct dmx_ts_feed *feed)
{
	struct dmxdev_filter *dmxdevfilter = feed->priv;
	struct dvb_ringbuffer *buffer;
	int ret;

	spin_lock(&dmxdevfilter->dev->lock);
	if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
		spin_unlock(&dmxdevfilter->dev->lock);
		return 0;
	}

	if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
	    || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
		buffer = &dmxdevfilter->buffer;
	else
		buffer = &dmxdevfilter->dev->dvr_buffer;
	if (buffer->error) {
		spin_unlock(&dmxdevfilter->dev->lock);
		wake_up(&buffer->queue);
		return 0;
	}
	ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
	if (ret == buffer1_len)
		ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
	if (ret < 0)
		buffer->error = ret;
	spin_unlock(&dmxdevfilter->dev->lock);
	wake_up(&buffer->queue);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
189
90.00%
3
42.86%
Peter Hartley
10
4.76%
1
14.29%
Michael Hunold
5
2.38%
1
14.29%
Mauro Carvalho Chehab
4
1.90%
1
14.29%
Andreas Oberritter
2
0.95%
1
14.29%
Total
210
100.00%
7
100.00%

/* stop feed but only mark the specified filter as stopped (state set) */


static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
{
	struct dmxdev_feed *feed;

	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);

	switch (dmxdevfilter->type) {
	case DMXDEV_TYPE_SEC:
		del_timer(&dmxdevfilter->timer);
		dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
		break;
	case DMXDEV_TYPE_PES:
		list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
			feed->ts->stop_filtering(feed->ts);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
72
80.90%
2
50.00%
Andreas Oberritter
15
16.85%
1
25.00%
Michael Hunold
2
2.25%
1
25.00%
Total
89
100.00%
4
100.00%

/* start feed associated with the specified filter */


static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
{
	struct dmxdev_feed *feed;
	int ret;

	dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);

	switch (filter->type) {
	case DMXDEV_TYPE_SEC:
		return filter->feed.sec->start_filtering(filter->feed.sec);
	case DMXDEV_TYPE_PES:
		list_for_each_entry(feed, &filter->feed.ts, next) {
			ret = feed->ts->start_filtering(feed->ts);
			if (ret < 0) {
				dvb_dmxdev_feed_stop(filter);
				return ret;
			}
		}
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
62
59.62%
3
50.00%
Andreas Oberritter
39
37.50%
1
16.67%
Michael Hunold
3
2.88%
2
33.33%
Total
104
100.00%
6
100.00%

/* restart section feed if it has filters left associated with it,
   otherwise release the feed */


static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
{
	int i;
	struct dmxdev *dmxdev = filter->dev;
	u16 pid = filter->params.sec.pid;

	for (i = 0; i < dmxdev->filternum; i++)
		if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
		    dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
		    dmxdev->filter[i].params.sec.pid == pid) {
			dvb_dmxdev_feed_start(&dmxdev->filter[i]);
			return 0;
		}

	filter->dev->demux->release_section_feed(dmxdev->demux,
						 filter->feed.sec);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
116
92.06%
3
50.00%
Michael Hunold
6
4.76%
2
33.33%
Andreas Oberritter
4
3.17%
1
16.67%
Total
126
100.00%
6
100.00%



static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
{
	struct dmxdev_feed *feed;
	struct dmx_demux *demux;

	if (dmxdevfilter->state < DMXDEV_STATE_GO)
		return 0;

	switch (dmxdevfilter->type) {
	case DMXDEV_TYPE_SEC:
		if (!dmxdevfilter->feed.sec)
			break;
		dvb_dmxdev_feed_stop(dmxdevfilter);
		if (dmxdevfilter->filter.sec)
			dmxdevfilter->feed.sec->
			    release_filter(dmxdevfilter->feed.sec,
					   dmxdevfilter->filter.sec);
		dvb_dmxdev_feed_restart(dmxdevfilter);
		dmxdevfilter->feed.sec = NULL;
		break;
	case DMXDEV_TYPE_PES:
		dvb_dmxdev_feed_stop(dmxdevfilter);
		demux = dmxdevfilter->dev->demux;
		list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
			demux->release_ts_feed(demux, feed->ts);
			feed->ts = NULL;
		}
		break;
	default:
		if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
			return 0;
		return -EINVAL;
	}

	dvb_ringbuffer_flush(&dmxdevfilter->buffer);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
138
80.23%
2
33.33%
Andreas Oberritter
30
17.44%
2
33.33%
Michael Hunold
2
1.16%
1
16.67%
Al Viro
2
1.16%
1
16.67%
Total
172
100.00%
6
100.00%



static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
{
	struct dmxdev_feed *feed, *tmp;

	/* delete all PIDs */
	list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
		list_del(&feed->next);
		kfree(feed);
	}

	BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
59
100.00%
1
100.00%
Total
59
100.00%
1
100.00%



static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
{
	if (dmxdevfilter->state < DMXDEV_STATE_SET)
		return 0;

	if (dmxdevfilter->type == DMXDEV_TYPE_PES)
		dvb_dmxdev_delete_pids(dmxdevfilter);

	dmxdevfilter->type = DMXDEV_TYPE_NONE;
	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
37
71.15%
2
50.00%
Andreas Oberritter
13
25.00%
1
25.00%
Michael Hunold
2
3.85%
1
25.00%
Total
52
100.00%
4
100.00%



static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
				 struct dmxdev_filter *filter,
				 struct dmxdev_feed *feed)
{
	ktime_t timeout = 0;
	struct dmx_pes_filter_params *para = &filter->params.pes;
	dmx_output_t otype;
	int ret;
	int ts_type;
	enum dmx_ts_pes ts_pes;
	struct dmx_ts_feed *tsfeed;

	feed->ts = NULL;
	otype = para->output;

	ts_pes = para->pes_type;

	if (ts_pes < DMX_PES_OTHER)
		ts_type = TS_DECODER;
	else
		ts_type = 0;

	if (otype == DMX_OUT_TS_TAP)
		ts_type |= TS_PACKET;
	else if (otype == DMX_OUT_TSDEMUX_TAP)
		ts_type |= TS_PACKET | TS_DEMUX;
	else if (otype == DMX_OUT_TAP)
		ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;

	ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
					      dvb_dmxdev_ts_callback);
	if (ret < 0)
		return ret;

	tsfeed = feed->ts;
	tsfeed->priv = filter;

	ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
	if (ret < 0) {
		dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
		return ret;
	}

	ret = tsfeed->start_filtering(tsfeed);
	if (ret < 0) {
		dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
		return ret;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
221
89.47%
1
16.67%
Alan Cox
20
8.10%
2
33.33%
Mauro Carvalho Chehab
2
0.81%
1
16.67%
Arnd Bergmann
2
0.81%
1
16.67%
Michael Hunold
2
0.81%
1
16.67%
Total
247
100.00%
6
100.00%



static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
{
	struct dmxdev *dmxdev = filter->dev;
	struct dmxdev_feed *feed;
	void *mem;
	int ret, i;

	if (filter->state < DMXDEV_STATE_SET)
		return -EINVAL;

	if (filter->state >= DMXDEV_STATE_GO)
		dvb_dmxdev_filter_stop(filter);

	if (!filter->buffer.data) {
		mem = vmalloc(filter->buffer.size);
		if (!mem)
			return -ENOMEM;
		spin_lock_irq(&filter->dev->lock);
		filter->buffer.data = mem;
		spin_unlock_irq(&filter->dev->lock);
	}

	dvb_ringbuffer_flush(&filter->buffer);

	switch (filter->type) {
	case DMXDEV_TYPE_SEC:
	{
		struct dmx_sct_filter_params *para = &filter->params.sec;
		struct dmx_section_filter **secfilter = &filter->filter.sec;
		struct dmx_section_feed **secfeed = &filter->feed.sec;

		*secfilter = NULL;
		*secfeed = NULL;


		/* find active filter/feed with same PID */
		for (i = 0; i < dmxdev->filternum; i++) {
			if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
			    dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
			    dmxdev->filter[i].params.sec.pid == para->pid) {
				*secfeed = dmxdev->filter[i].feed.sec;
				break;
			}
		}

		/* if no feed found, try to allocate new one */
		if (!*secfeed) {
			ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
								   secfeed,
								   dvb_dmxdev_section_callback);
			if (ret < 0) {
				pr_err("DVB (%s): could not alloc feed\n",
				       __func__);
				return ret;
			}

			ret = (*secfeed)->set(*secfeed, para->pid,
					      (para->flags & DMX_CHECK_CRC) ? 1 : 0);
			if (ret < 0) {
				pr_err("DVB (%s): could not set feed\n",
				       __func__);
				dvb_dmxdev_feed_restart(filter);
				return ret;
			}
		} else {
			dvb_dmxdev_feed_stop(filter);
		}

		ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
		if (ret < 0) {
			dvb_dmxdev_feed_restart(filter);
			filter->feed.sec->start_filtering(*secfeed);
			dprintk("could not get filter\n");
			return ret;
		}

		(*secfilter)->priv = filter;

		memcpy(&((*secfilter)->filter_value[3]),
		       &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
		memcpy(&(*secfilter)->filter_mask[3],
		       &para->filter.mask[1], DMX_FILTER_SIZE - 1);
		memcpy(&(*secfilter)->filter_mode[3],
		       &para->filter.mode[1], DMX_FILTER_SIZE - 1);

		(*secfilter)->filter_value[0] = para->filter.filter[0];
		(*secfilter)->filter_mask[0] = para->filter.mask[0];
		(*secfilter)->filter_mode[0] = para->filter.mode[0];
		(*secfilter)->filter_mask[1] = 0;
		(*secfilter)->filter_mask[2] = 0;

		filter->todo = 0;

		ret = filter->feed.sec->start_filtering(filter->feed.sec);
		if (ret < 0)
			return ret;

		dvb_dmxdev_filter_timer(filter);
		break;
	}
	case DMXDEV_TYPE_PES:
		list_for_each_entry(feed, &filter->feed.ts, next) {
			ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
			if (ret < 0) {
				dvb_dmxdev_filter_stop(filter);
				return ret;
			}
		}
		break;
	default:
		return -EINVAL;
	}

	dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
569
82.82%
3
27.27%
Andreas Oberritter
107
15.57%
3
27.27%
Michael Hunold
4
0.58%
1
9.09%
Mauro Carvalho Chehab
2
0.29%
1
9.09%
Harvey Harrison
2
0.29%
1
9.09%
Al Viro
2
0.29%
1
9.09%
Peter Beutner
1
0.15%
1
9.09%
Total
687
100.00%
11
100.00%



static int dvb_demux_open(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;
	int i;
	struct dmxdev_filter *dmxdevfilter;

	if (!dmxdev->filter)
		return -EINVAL;

	if (mutex_lock_interruptible(&dmxdev->mutex))
		return -ERESTARTSYS;

	for (i = 0; i < dmxdev->filternum; i++)
		if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
			break;

	if (i == dmxdev->filternum) {
		mutex_unlock(&dmxdev->mutex);
		return -EMFILE;
	}

	dmxdevfilter = &dmxdev->filter[i];
	mutex_init(&dmxdevfilter->mutex);
	file->private_data = dmxdevfilter;

	dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
	dmxdevfilter->type = DMXDEV_TYPE_NONE;
	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
	init_timer(&dmxdevfilter->timer);

	dvbdev->users++;

	mutex_unlock(&dmxdev->mutex);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
173
90.58%
3
42.86%
Andreas Oberritter
5
2.62%
1
14.29%
Markus Rechberger
5
2.62%
1
14.29%
Michael Hunold
4
2.09%
1
14.29%
Ingo Molnar
4
2.09%
1
14.29%
Total
191
100.00%
7
100.00%



static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
				  struct dmxdev_filter *dmxdevfilter)
{
	mutex_lock(&dmxdev->mutex);
	mutex_lock(&dmxdevfilter->mutex);

	dvb_dmxdev_filter_stop(dmxdevfilter);
	dvb_dmxdev_filter_reset(dmxdevfilter);

	if (dmxdevfilter->buffer.data) {
		void *mem = dmxdevfilter->buffer.data;

		spin_lock_irq(&dmxdev->lock);
		dmxdevfilter->buffer.data = NULL;
		spin_unlock_irq(&dmxdev->lock);
		vfree(mem);
	}

	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
	wake_up(&dmxdevfilter->buffer.queue);
	mutex_unlock(&dmxdevfilter->mutex);
	mutex_unlock(&dmxdev->mutex);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
87
68.50%
1
14.29%
Alan Cox
32
25.20%
3
42.86%
Michael Hunold
5
3.94%
2
28.57%
Simon Arlott
3
2.36%
1
14.29%
Total
127
100.00%
7
100.00%



static inline void invert_mode(dmx_filter_t *filter)
{
	int i;

	for (i = 0; i < DMX_FILTER_SIZE; i++)
		filter->mode[i] ^= 0xff;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
36
100.00%
1
100.00%
Total
36
100.00%
1
100.00%



static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
			      struct dmxdev_filter *filter, u16 pid)
{
	struct dmxdev_feed *feed;

	if ((filter->type != DMXDEV_TYPE_PES) ||
	    (filter->state < DMXDEV_STATE_SET))
		return -EINVAL;

	/* only TS packet filters may have multiple PIDs */
	if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
	    (!list_empty(&filter->feed.ts)))
		return -EINVAL;

	feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
	if (feed == NULL)
		return -ENOMEM;

	feed->pid = pid;
	list_add(&feed->next, &filter->feed.ts);

	if (filter->state >= DMXDEV_STATE_GO)
		return dvb_dmxdev_start_feed(dmxdev, filter, feed);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
143
100.00%
1
100.00%
Total
143
100.00%
1
100.00%



static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
				  struct dmxdev_filter *filter, u16 pid)
{
	struct dmxdev_feed *feed, *tmp;

	if ((filter->type != DMXDEV_TYPE_PES) ||
	    (filter->state < DMXDEV_STATE_SET))
		return -EINVAL;

	list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
		if ((feed->pid == pid) && (feed->ts != NULL)) {
			feed->ts->stop_filtering(feed->ts);
			filter->dev->demux->release_ts_feed(filter->dev->demux,
							    feed->ts);
			list_del(&feed->next);
			kfree(feed);
		}
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Oberritter
98
77.17%
1
33.33%
Alan Cox
29
22.83%
2
66.67%
Total
127
100.00%
3
100.00%



static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
				 struct dmxdev_filter *dmxdevfilter,
				 struct dmx_sct_filter_params *params)
{
	dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
		__func__, params->pid, params->flags, params->timeout);

	dvb_dmxdev_filter_stop(dmxdevfilter);

	dmxdevfilter->type = DMXDEV_TYPE_SEC;
	memcpy(&dmxdevfilter->params.sec,
	       params, sizeof(struct dmx_sct_filter_params));
	invert_mode(&dmxdevfilter->params.sec.filter);
	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);

	if (params->flags & DMX_IMMEDIATE_START)
		return dvb_dmxdev_filter_start(dmxdevfilter);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
87
82.86%
2
33.33%
Mauro Carvalho Chehab
13
12.38%
2
33.33%
Michael Hunold
4
3.81%
1
16.67%
Harvey Harrison
1
0.95%
1
16.67%
Total
105
100.00%
6
100.00%



static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
				     struct dmxdev_filter *dmxdevfilter,
				     struct dmx_pes_filter_params *params)
{
	int ret;

	dvb_dmxdev_filter_stop(dmxdevfilter);
	dvb_dmxdev_filter_reset(dmxdevfilter);

	if ((unsigned int)params->pes_type > DMX_PES_OTHER)
		return -EINVAL;

	dmxdevfilter->type = DMXDEV_TYPE_PES;
	memcpy(&dmxdevfilter->params, params,
	       sizeof(struct dmx_pes_filter_params));
	INIT_LIST_HEAD(&dmxdevfilter->feed.ts);

	dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);

	ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
				 dmxdevfilter->params.pes.pid);
	if (ret < 0)
		return ret;

	if (params->flags & DMX_IMMEDIATE_START)
		return dvb_dmxdev_filter_start(dmxdevfilter);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
80
60.61%
2
28.57%
Andreas Oberritter
34
25.76%
1
14.29%
Francesco Lavra
10
7.58%
1
14.29%
Michael Hunold
4
3.03%
1
14.29%
Mauro Carvalho Chehab
3
2.27%
1
14.29%
devendra sharma
1
0.76%
1
14.29%
Total
132
100.00%
7
100.00%



static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
				   struct file *file, char __user *buf,
				   size_t count, loff_t *ppos)
{
	int result, hcount;
	int done = 0;

	if (dfil->todo <= 0) {
		hcount = 3 + dfil->todo;
		if (hcount > count)
			hcount = count;
		result = dvb_dmxdev_buffer_read(&dfil->buffer,
						file->f_flags & O_NONBLOCK,
						buf, hcount, ppos);
		if (result < 0) {
			dfil->todo = 0;
			return result;
		}
		if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
			return -EFAULT;
		buf += result;
		done = result;
		count -= result;
		dfil->todo -= result;
		if (dfil->todo > -3)
			return done;
		dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
		if (!count)
			return done;
	}
	if (count > dfil->todo)
		count = dfil->todo;
	result = dvb_dmxdev_buffer_read(&dfil->buffer,
					file->f_flags & O_NONBLOCK,
					buf, count, ppos);
	if (result < 0)
		return result;
	dfil->todo -= result;
	return (result + done);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
245
98.79%
2
50.00%
Michael Hunold
2
0.81%
1
25.00%
Al Viro
1
0.40%
1
25.00%
Total
248
100.00%
4
100.00%


static ssize_t

dvb_demux_read(struct file *file, char __user *buf, size_t count,
	       loff_t *ppos)
{
	struct dmxdev_filter *dmxdevfilter = file->private_data;
	int ret;

	if (mutex_lock_interruptible(&dmxdevfilter->mutex))
		return -ERESTARTSYS;

	if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
		ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
	else
		ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
					     file->f_flags & O_NONBLOCK,
					     buf, count, ppos);

	mutex_unlock(&dmxdevfilter->mutex);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
98
92.45%
3
37.50%
Michael Hunold
3
2.83%
2
25.00%
Peter Beutner
2
1.89%
1
12.50%
Ingo Molnar
2
1.89%
1
12.50%
Al Viro
1
0.94%
1
12.50%
Total
106
100.00%
8
100.00%



static int dvb_demux_do_ioctl(struct file *file,
			      unsigned int cmd, void *parg)
{
	struct dmxdev_filter *dmxdevfilter = file->private_data;
	struct dmxdev *dmxdev = dmxdevfilter->dev;
	unsigned long arg = (unsigned long)parg;
	int ret = 0;

	if (mutex_lock_interruptible(&dmxdev->mutex))
		return -ERESTARTSYS;

	switch (cmd) {
	case DMX_START:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			mutex_unlock(&dmxdev->mutex);
			return -ERESTARTSYS;
		}
		if (dmxdevfilter->state < DMXDEV_STATE_SET)
			ret = -EINVAL;
		else
			ret = dvb_dmxdev_filter_start(dmxdevfilter);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_STOP:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			mutex_unlock(&dmxdev->mutex);
			return -ERESTARTSYS;
		}
		ret = dvb_dmxdev_filter_stop(dmxdevfilter);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_SET_FILTER:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			mutex_unlock(&dmxdev->mutex);
			return -ERESTARTSYS;
		}
		ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_SET_PES_FILTER:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			mutex_unlock(&dmxdev->mutex);
			return -ERESTARTSYS;
		}
		ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_SET_BUFFER_SIZE:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			mutex_unlock(&dmxdev->mutex);
			return -ERESTARTSYS;
		}
		ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_GET_PES_PIDS:
		if (!dmxdev->demux->get_pes_pids) {
			ret = -EINVAL;
			break;
		}
		dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
		break;

#if 0
	/* Not used upstream and never documented */

	case DMX_GET_CAPS:
                if (!dmxdev->demux->get_caps) {
                        ret = -EINVAL;
                        break;
                }
                ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
                break;

        case DMX_SET_SOURCE:
                if (!dmxdev->demux->set_source) {
                        ret = -EINVAL;
                        break;
                }
                ret = dmxdev->demux->set_source(dmxdev->demux, parg);
                break;
#endif

	case DMX_GET_STC:
		if (!dmxdev->demux->get_stc) {
			ret = -EINVAL;
			break;
		}
		ret = dmxdev->demux->get_stc(dmxdev->demux,
					     ((struct dmx_stc *)parg)->num,
					     &((struct dmx_stc *)parg)->stc,
					     &((struct dmx_stc *)parg)->base);
		break;

	case DMX_ADD_PID:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			ret = -ERESTARTSYS;
			break;
		}
		ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	case DMX_REMOVE_PID:
		if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
			ret = -ERESTARTSYS;
			break;
		}
		ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
		mutex_unlock(&dmxdevfilter->mutex);
		break;

	default:
		ret = -EINVAL;
		break;
	}
	mutex_unlock(&dmxdev->mutex);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
407
76.65%
3
30.00%
Andreas Oberritter
94
17.70%
3
30.00%
Ingo Molnar
17
3.20%
1
10.00%
Mauro Carvalho Chehab
7
1.32%
1
10.00%
Michael Hunold
4
0.75%
1
10.00%
Peter Beutner
2
0.38%
1
10.00%
Total
531
100.00%
10
100.00%



static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
			    unsigned long arg)
{
	return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
29
93.55%
2
50.00%
Arnd Bergmann
2
6.45%
2
50.00%
Total
31
100.00%
4
100.00%



static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
{
	struct dmxdev_filter *dmxdevfilter = file->private_data;
	unsigned int mask = 0;

	if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
		return POLLERR;

	poll_wait(file, &dmxdevfilter->buffer.queue, wait);

	if (dmxdevfilter->state != DMXDEV_STATE_GO &&
	    dmxdevfilter->state != DMXDEV_STATE_DONE &&
	    dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
		return 0;

	if (dmxdevfilter->buffer.error)
		mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);

	if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
		mask |= (POLLIN | POLLRDNORM | POLLPRI);

	return mask;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
103
80.47%
2
22.22%
Michael Hunold
9
7.03%
2
22.22%
Changbing Xiong
6
4.69%
2
22.22%
Andreas Oberritter
5
3.91%
1
11.11%
Mauro Carvalho Chehab
3
2.34%
1
11.11%
Peter Beutner
2
1.56%
1
11.11%
Total
128
100.00%
9
100.00%



static int dvb_demux_release(struct inode *inode, struct file *file)
{
	struct dmxdev_filter *dmxdevfilter = file->private_data;
	struct dmxdev *dmxdev = dmxdevfilter->dev;

	int ret;

	ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);

	mutex_lock(&dmxdev->mutex);
	dmxdev->dvbdev->users--;
	if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
		mutex_unlock(&dmxdev->mutex);
		wake_up(&dmxdev->dvbdev->wait_queue);
	} else
		mutex_unlock(&dmxdev->mutex);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Markus Rechberger
68
62.39%
1
16.67%
Alan Cox
34
31.19%
2
33.33%
Michael Hunold
5
4.59%
2
33.33%
Peter Beutner
2
1.83%
1
16.67%
Total
109
100.00%
6
100.00%


static const struct file_operations dvb_demux_fops = {
	.owner = THIS_MODULE,
	.read = dvb_demux_read,
	.unlocked_ioctl = dvb_demux_ioctl,
	.open = dvb_demux_open,
	.release = dvb_demux_release,
	.poll = dvb_demux_poll,
	.llseek = default_llseek,
};


static const struct dvb_device dvbdev_demux = {
	.priv = NULL,
	.users = 1,
	.writers = 1,
#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
	.name = "dvb-demux",
#endif
	.fops = &dvb_demux_fops
};



static int dvb_dvr_do_ioctl(struct file *file,
			    unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;
	unsigned long arg = (unsigned long)parg;
	int ret;

	if (mutex_lock_interruptible(&dmxdev->mutex))
		return -ERESTARTSYS;

	switch (cmd) {
	case DMX_SET_BUFFER_SIZE:
		ret = dvb_dvr_set_buffer_size(dmxdev, arg);
		break;

	default:
		ret = -EINVAL;
		break;
	}
	mutex_unlock(&dmxdev->mutex);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
80
79.21%
2
33.33%
Andrea Odetti
16
15.84%
1
16.67%
Michael Hunold
2
1.98%
1
16.67%
Ingo Molnar
2
1.98%
1
16.67%
Andreas Oberritter
1
0.99%
1
16.67%
Total
101
100.00%
6
100.00%



static long dvb_dvr_ioctl(struct file *file,
			 unsigned int cmd, unsigned long arg)
{
	return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
29
93.55%
2
50.00%
Arnd Bergmann
2
6.45%
2
50.00%
Total
31
100.00%
4
100.00%



static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dmxdev *dmxdev = dvbdev->priv;
	unsigned int mask = 0;

	dprintk("%s\n", __func__);

	if (dmxdev->exit)
		return POLLERR;

	poll_wait(file, &dmxdev->dvr_buffer.queue, wait);

	if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
		if (dmxdev->dvr_buffer.error)
			mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);

		if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
			mask |= (POLLIN | POLLRDNORM | POLLPRI);
	} else
		mask |= (POLLOUT | POLLWRNORM | POLLPRI);

	return mask;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
120
86.33%
3
33.33%
Changbing Xiong
9
6.47%
1
11.11%
Andreas Oberritter
5
3.60%
1
11.11%
Michael Hunold
3
2.16%
2
22.22%
Mauro Carvalho Chehab
1
0.72%
1
11.11%
Harvey Harrison
1
0.72%
1
11.11%
Total
139
100.00%
9
100.00%


static const struct file_operations dvb_dvr_fops = {
	.owner = THIS_MODULE,
	.read = dvb_dvr_read,
	.write = dvb_dvr_write,
	.unlocked_ioctl = dvb_dvr_ioctl,
	.open = dvb_dvr_open,
	.release = dvb_dvr_release,
	.poll = dvb_dvr_poll,
	.llseek = default_llseek,
};


static const struct dvb_device dvbdev_dvr = {
	.priv = NULL,
	.readers = 1,
	.users = 1,
#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
	.name = "dvb-dvr",
#endif
	.fops = &dvb_dvr_fops
};


int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
{
	int i;

	if (dmxdev->demux->open(dmxdev->demux) < 0)
		return -EUSERS;

	dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
	if (!dmxdev->filter)
		return -ENOMEM;

	mutex_init(&dmxdev->mutex);
	spin_lock_init(&dmxdev->lock);
	for (i = 0; i < dmxdev->filternum; i++) {
		dmxdev->filter[i].dev = dmxdev;
		dmxdev->filter[i].buffer.data = NULL;
		dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
					    DMXDEV_STATE_FREE);
	}

	dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
			    DVB_DEVICE_DEMUX, dmxdev->filternum);
	dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
			    dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);

	dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
172
89.58%
2
25.00%
Mauro Carvalho Chehab
8
4.17%
1
12.50%
Andreas Oberritter
6
3.12%
2
25.00%
Michael Hunold
4
2.08%
1
12.50%
Al Viro
1
0.52%
1
12.50%
Ingo Molnar
1
0.52%
1
12.50%
Total
192
100.00%
8
100.00%


EXPORT_SYMBOL(dvb_dmxdev_init);



void dvb_dmxdev_release(struct dmxdev *dmxdev)
{
	dmxdev->exit = 1;
	if (dmxdev->dvbdev->users > 1) {
		wait_event(dmxdev->dvbdev->wait_queue,
				dmxdev->dvbdev->users == 1);
	}
	if (dmxdev->dvr_dvbdev->users > 1) {
		wait_event(dmxdev->dvr_dvbdev->wait_queue,
				dmxdev->dvr_dvbdev->users == 1);
	}

	dvb_unregister_device(dmxdev->dvbdev);
	dvb_unregister_device(dmxdev->dvr_dvbdev);

	vfree(dmxdev->filter);
	dmxdev->filter = NULL;
	dmxdev->demux->close(dmxdev->demux);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Markus Rechberger
64
57.14%
1
16.67%
Alan Cox
44
39.29%
2
33.33%
Michael Hunold
2
1.79%
1
16.67%
Al Viro
1
0.89%
1
16.67%
Andreas Oberritter
1
0.89%
1
16.67%
Total
112
100.00%
6
100.00%


EXPORT_SYMBOL(dvb_dmxdev_release);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
4375
69.15%
3
5.88%
Andreas Oberritter
1127
17.81%
5
9.80%
Markus Rechberger
236
3.73%
1
1.96%
Andrea Odetti
179
2.83%
2
3.92%
Michael Hunold
146
2.31%
4
7.84%
Mauro Carvalho Chehab
92
1.45%
10
19.61%
Trent Piepho
36
0.57%
1
1.96%
Ingo Molnar
35
0.55%
1
1.96%
Arnd Bergmann
18
0.28%
4
7.84%
Al Viro
17
0.27%
3
5.88%
Changbing Xiong
15
0.24%
2
3.92%
Francesco Lavra
10
0.16%
1
1.96%
Peter Hartley
10
0.16%
1
1.96%
Peter Beutner
9
0.14%
2
3.92%
Simon Arlott
6
0.09%
2
3.92%
Harvey Harrison
5
0.08%
1
1.96%
Alexey Dobriyan
4
0.06%
2
3.92%
devendra sharma
2
0.03%
1
1.96%
Jan Engelhardt
1
0.02%
1
1.96%
Linus Torvalds
1
0.02%
1
1.96%
Johannes Stezenbach
1
0.02%
1
1.96%
Andy Shevchenko
1
0.02%
1
1.96%
Sakari Ailus
1
0.02%
1
1.96%
Total
6327
100.00%
51
100.00%
Directory: drivers/media/dvb-core

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.