![Arnd Bergmann](/assets/img/avatar_default.png)
The dvb demuxer code uses a 'struct timespec' to pass a timeout as absolute time. This will cause problems on 32-bit architectures in 2038 when time_t overflows, and it is racy with a concurrent settimeofday() call. This patch changes the code to use ktime_get() instead, using the monotonic time base to avoid both the race and the overflow. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
1279 lines
30 KiB
C
1279 lines
30 KiB
C
/*
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* dmxdev.c - DVB demultiplexer device
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*
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* Copyright (C) 2000 Ralph Metzler & Marcus Metzler
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* for convergence integrated media GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/ioctl.h>
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#include <linux/wait.h>
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#include <asm/uaccess.h>
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#include "dmxdev.h"
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
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#define dprintk if (debug) printk
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static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
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const u8 *src, size_t len)
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{
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ssize_t free;
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if (!len)
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return 0;
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if (!buf->data)
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return 0;
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free = dvb_ringbuffer_free(buf);
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if (len > free) {
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dprintk("dmxdev: buffer overflow\n");
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return -EOVERFLOW;
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}
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return dvb_ringbuffer_write(buf, src, len);
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}
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static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
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int non_blocking, char __user *buf,
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size_t count, loff_t *ppos)
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{
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size_t todo;
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ssize_t avail;
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ssize_t ret = 0;
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if (!src->data)
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return 0;
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if (src->error) {
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ret = src->error;
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dvb_ringbuffer_flush(src);
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return ret;
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}
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for (todo = count; todo > 0; todo -= ret) {
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if (non_blocking && dvb_ringbuffer_empty(src)) {
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ret = -EWOULDBLOCK;
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break;
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}
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ret = wait_event_interruptible(src->queue,
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!dvb_ringbuffer_empty(src) ||
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(src->error != 0));
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if (ret < 0)
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break;
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if (src->error) {
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ret = src->error;
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dvb_ringbuffer_flush(src);
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break;
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}
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avail = dvb_ringbuffer_avail(src);
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if (avail > todo)
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avail = todo;
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ret = dvb_ringbuffer_read_user(src, buf, avail);
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if (ret < 0)
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break;
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buf += ret;
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}
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return (count - todo) ? (count - todo) : ret;
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}
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static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
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{
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struct list_head *head, *pos;
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head = demux->get_frontends(demux);
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if (!head)
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return NULL;
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list_for_each(pos, head)
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if (DMX_FE_ENTRY(pos)->source == type)
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return DMX_FE_ENTRY(pos);
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return NULL;
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}
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static int dvb_dvr_open(struct inode *inode, struct file *file)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dmxdev *dmxdev = dvbdev->priv;
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struct dmx_frontend *front;
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dprintk("function : %s\n", __func__);
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if (mutex_lock_interruptible(&dmxdev->mutex))
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return -ERESTARTSYS;
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if (dmxdev->exit) {
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mutex_unlock(&dmxdev->mutex);
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return -ENODEV;
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}
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if ((file->f_flags & O_ACCMODE) == O_RDWR) {
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if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
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mutex_unlock(&dmxdev->mutex);
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return -EOPNOTSUPP;
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}
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}
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if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
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void *mem;
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if (!dvbdev->readers) {
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mutex_unlock(&dmxdev->mutex);
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return -EBUSY;
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}
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mem = vmalloc(DVR_BUFFER_SIZE);
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if (!mem) {
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mutex_unlock(&dmxdev->mutex);
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return -ENOMEM;
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}
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dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
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dvbdev->readers--;
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}
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if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
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dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
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if (!dmxdev->demux->write) {
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mutex_unlock(&dmxdev->mutex);
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return -EOPNOTSUPP;
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}
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front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
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if (!front) {
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mutex_unlock(&dmxdev->mutex);
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return -EINVAL;
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}
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dmxdev->demux->disconnect_frontend(dmxdev->demux);
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dmxdev->demux->connect_frontend(dmxdev->demux, front);
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}
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dvbdev->users++;
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mutex_unlock(&dmxdev->mutex);
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return 0;
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}
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static int dvb_dvr_release(struct inode *inode, struct file *file)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dmxdev *dmxdev = dvbdev->priv;
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mutex_lock(&dmxdev->mutex);
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if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
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dmxdev->demux->disconnect_frontend(dmxdev->demux);
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dmxdev->demux->connect_frontend(dmxdev->demux,
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dmxdev->dvr_orig_fe);
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}
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if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
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dvbdev->readers++;
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if (dmxdev->dvr_buffer.data) {
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void *mem = dmxdev->dvr_buffer.data;
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mb();
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spin_lock_irq(&dmxdev->lock);
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dmxdev->dvr_buffer.data = NULL;
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spin_unlock_irq(&dmxdev->lock);
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vfree(mem);
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}
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}
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/* TODO */
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dvbdev->users--;
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if (dvbdev->users == 1 && dmxdev->exit == 1) {
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mutex_unlock(&dmxdev->mutex);
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wake_up(&dvbdev->wait_queue);
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} else
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mutex_unlock(&dmxdev->mutex);
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return 0;
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}
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static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dmxdev *dmxdev = dvbdev->priv;
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int ret;
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if (!dmxdev->demux->write)
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return -EOPNOTSUPP;
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if ((file->f_flags & O_ACCMODE) != O_WRONLY)
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return -EINVAL;
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if (mutex_lock_interruptible(&dmxdev->mutex))
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return -ERESTARTSYS;
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if (dmxdev->exit) {
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mutex_unlock(&dmxdev->mutex);
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return -ENODEV;
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}
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ret = dmxdev->demux->write(dmxdev->demux, buf, count);
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mutex_unlock(&dmxdev->mutex);
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return ret;
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}
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static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
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loff_t *ppos)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dmxdev *dmxdev = dvbdev->priv;
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if (dmxdev->exit)
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return -ENODEV;
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return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
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file->f_flags & O_NONBLOCK,
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buf, count, ppos);
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}
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static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
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unsigned long size)
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{
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struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
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void *newmem;
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void *oldmem;
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dprintk("function : %s\n", __func__);
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if (buf->size == size)
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return 0;
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if (!size)
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return -EINVAL;
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newmem = vmalloc(size);
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if (!newmem)
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return -ENOMEM;
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oldmem = buf->data;
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spin_lock_irq(&dmxdev->lock);
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buf->data = newmem;
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buf->size = size;
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/* reset and not flush in case the buffer shrinks */
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dvb_ringbuffer_reset(buf);
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spin_unlock_irq(&dmxdev->lock);
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vfree(oldmem);
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return 0;
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}
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static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
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*dmxdevfilter, int state)
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{
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spin_lock_irq(&dmxdevfilter->dev->lock);
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dmxdevfilter->state = state;
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spin_unlock_irq(&dmxdevfilter->dev->lock);
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}
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static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
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unsigned long size)
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{
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struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
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void *newmem;
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void *oldmem;
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if (buf->size == size)
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return 0;
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if (!size)
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return -EINVAL;
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if (dmxdevfilter->state >= DMXDEV_STATE_GO)
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return -EBUSY;
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newmem = vmalloc(size);
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if (!newmem)
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return -ENOMEM;
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oldmem = buf->data;
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spin_lock_irq(&dmxdevfilter->dev->lock);
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buf->data = newmem;
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buf->size = size;
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/* reset and not flush in case the buffer shrinks */
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dvb_ringbuffer_reset(buf);
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spin_unlock_irq(&dmxdevfilter->dev->lock);
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vfree(oldmem);
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return 0;
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}
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static void dvb_dmxdev_filter_timeout(unsigned long data)
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{
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struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
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dmxdevfilter->buffer.error = -ETIMEDOUT;
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spin_lock_irq(&dmxdevfilter->dev->lock);
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dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
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spin_unlock_irq(&dmxdevfilter->dev->lock);
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wake_up(&dmxdevfilter->buffer.queue);
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}
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static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
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{
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struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
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del_timer(&dmxdevfilter->timer);
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if (para->timeout) {
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dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
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dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
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dmxdevfilter->timer.expires =
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jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
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add_timer(&dmxdevfilter->timer);
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}
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}
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static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
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const u8 *buffer2, size_t buffer2_len,
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struct dmx_section_filter *filter)
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{
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struct dmxdev_filter *dmxdevfilter = filter->priv;
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int ret;
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if (dmxdevfilter->buffer.error) {
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wake_up(&dmxdevfilter->buffer.queue);
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return 0;
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}
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spin_lock(&dmxdevfilter->dev->lock);
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if (dmxdevfilter->state != DMXDEV_STATE_GO) {
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spin_unlock(&dmxdevfilter->dev->lock);
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return 0;
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}
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del_timer(&dmxdevfilter->timer);
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dprintk("dmxdev: section callback %*ph\n", 6, buffer1);
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ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
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buffer1_len);
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if (ret == buffer1_len) {
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ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
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buffer2_len);
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}
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if (ret < 0)
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dmxdevfilter->buffer.error = ret;
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if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
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dmxdevfilter->state = DMXDEV_STATE_DONE;
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spin_unlock(&dmxdevfilter->dev->lock);
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wake_up(&dmxdevfilter->buffer.queue);
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return 0;
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}
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static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
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const u8 *buffer2, size_t buffer2_len,
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struct dmx_ts_feed *feed)
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{
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struct dmxdev_filter *dmxdevfilter = feed->priv;
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struct dvb_ringbuffer *buffer;
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int ret;
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spin_lock(&dmxdevfilter->dev->lock);
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if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
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spin_unlock(&dmxdevfilter->dev->lock);
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return 0;
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}
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if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
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|| dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
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buffer = &dmxdevfilter->buffer;
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else
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buffer = &dmxdevfilter->dev->dvr_buffer;
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if (buffer->error) {
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spin_unlock(&dmxdevfilter->dev->lock);
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wake_up(&buffer->queue);
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return 0;
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}
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ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
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if (ret == buffer1_len)
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ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
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if (ret < 0)
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buffer->error = ret;
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spin_unlock(&dmxdevfilter->dev->lock);
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wake_up(&buffer->queue);
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return 0;
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}
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/* stop feed but only mark the specified filter as stopped (state set) */
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static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
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{
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struct dmxdev_feed *feed;
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dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
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switch (dmxdevfilter->type) {
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case DMXDEV_TYPE_SEC:
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del_timer(&dmxdevfilter->timer);
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dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
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break;
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case DMXDEV_TYPE_PES:
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list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
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feed->ts->stop_filtering(feed->ts);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* start feed associated with the specified filter */
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static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
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{
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struct dmxdev_feed *feed;
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int ret;
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dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
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switch (filter->type) {
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case DMXDEV_TYPE_SEC:
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return filter->feed.sec->start_filtering(filter->feed.sec);
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case DMXDEV_TYPE_PES:
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list_for_each_entry(feed, &filter->feed.ts, next) {
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ret = feed->ts->start_filtering(feed->ts);
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if (ret < 0) {
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dvb_dmxdev_feed_stop(filter);
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return ret;
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}
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* restart section feed if it has filters left associated with it,
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otherwise release the feed */
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static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
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{
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int i;
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struct dmxdev *dmxdev = filter->dev;
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u16 pid = filter->params.sec.pid;
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for (i = 0; i < dmxdev->filternum; i++)
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if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
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dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
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dmxdev->filter[i].params.sec.pid == pid) {
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dvb_dmxdev_feed_start(&dmxdev->filter[i]);
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return 0;
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}
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filter->dev->demux->release_section_feed(dmxdev->demux,
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filter->feed.sec);
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return 0;
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}
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static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
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{
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struct dmxdev_feed *feed;
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struct dmx_demux *demux;
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if (dmxdevfilter->state < DMXDEV_STATE_GO)
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return 0;
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switch (dmxdevfilter->type) {
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case DMXDEV_TYPE_SEC:
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if (!dmxdevfilter->feed.sec)
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break;
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dvb_dmxdev_feed_stop(dmxdevfilter);
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if (dmxdevfilter->filter.sec)
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dmxdevfilter->feed.sec->
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release_filter(dmxdevfilter->feed.sec,
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dmxdevfilter->filter.sec);
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dvb_dmxdev_feed_restart(dmxdevfilter);
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dmxdevfilter->feed.sec = NULL;
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|
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);
|
|
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;
|
|
}
|
|
|
|
static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static long dvb_dvr_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
|
|
}
|
|
|
|
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("function : %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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
EXPORT_SYMBOL(dvb_dmxdev_release);
|