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dmxdev.c
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dmxdev.c
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/*
* 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#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 <asm/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 if (debug) printk
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("dmxdev: buffer overflow\n");
return -EOVERFLOW;
}
return dvb_ringbuffer_write(buf, src, len);
}
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;
}
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;
}
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("function : %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;
}
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;
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;
}
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;
}
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);
}
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("function : %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;
}
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);
}
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;
}
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);
}
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);
}
}
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("dmxdev: 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;
}
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;
}
/* 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;
}
/* 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;
}
/* 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;
}
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;
}
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));
}
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;
}
static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
struct dmxdev_filter *filter,
struct dmxdev_feed *feed)
{
ktime_t timeout = ktime_set(0, 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, 32768, 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;
}
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) {
printk("DVB (%s): could not alloc feed\n",
__func__);
return ret;
}
ret = (*secfeed)->set(*secfeed, para->pid, 32768,
(para->flags & DMX_CHECK_CRC) ? 1 : 0);
if (ret < 0) {
printk("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],
¶->filter.mask[1], DMX_FILTER_SIZE - 1);
memcpy(&(*secfilter)->filter_mode[3],
¶->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;
}
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;
}
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;
}
static inline void invert_mode(dmx_filter_t *filter)
{
int i;
for (i = 0; i < DMX_FILTER_SIZE; i++)
filter->mode[i] ^= 0xff;
}
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;
}
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;
}
static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
struct dmxdev_filter *dmxdevfilter,
struct dmx_sct_filter_params *params)
{
dprintk("function : %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;
}
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)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;
}
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);
}
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;
}
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);