diff options
Diffstat (limited to 'drivers/media/dvb-core/dmxdev.c')
| -rw-r--r-- | drivers/media/dvb-core/dmxdev.c | 1268 |
1 files changed, 1268 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dmxdev.c b/drivers/media/dvb-core/dmxdev.c new file mode 100644 index 00000000000..c0363f1b6c9 --- /dev/null +++ b/drivers/media/dvb-core/dmxdev.c @@ -0,0 +1,1268 @@ +/* + * 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, + enum dmx_success success) +{ + 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, + enum dmx_success success) +{ + 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) +{ + struct timespec 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, 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; + + 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; + + 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) + return -EINVAL; + + 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 struct dvb_device dvbdev_demux = { + .priv = NULL, + .users = 1, + .writers = 1, + .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__); + + 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 struct dvb_device dvbdev_dvr = { + .priv = NULL, + .readers = 1, + .users = 1, + .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); + dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, + dmxdev, DVB_DEVICE_DVR); + + 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); |