2 * dmxdev.c - DVB demultiplexer device
4 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
5 * for convergence integrated media GmbH
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #define pr_fmt(fmt) "dmxdev: " fmt
21 #include <linux/sched.h>
22 #include <linux/spinlock.h>
23 #include <linux/slab.h>
24 #include <linux/vmalloc.h>
25 #include <linux/module.h>
26 #include <linux/poll.h>
27 #include <linux/ioctl.h>
28 #include <linux/wait.h>
29 #include <linux/uaccess.h>
30 #include <media/dmxdev.h>
31 #include <media/dvb_vb2.h>
35 module_param(debug, int, 0644);
36 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
38 #define dprintk(fmt, arg...) do { \
40 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
44 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
45 const u8 *src, size_t len)
54 free = dvb_ringbuffer_free(buf);
56 dprintk("buffer overflow\n");
60 return dvb_ringbuffer_write(buf, src, len);
63 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
64 int non_blocking, char __user *buf,
65 size_t count, loff_t *ppos)
76 dvb_ringbuffer_flush(src);
80 for (todo = count; todo > 0; todo -= ret) {
81 if (non_blocking && dvb_ringbuffer_empty(src)) {
86 ret = wait_event_interruptible(src->queue,
87 !dvb_ringbuffer_empty(src) ||
94 dvb_ringbuffer_flush(src);
98 avail = dvb_ringbuffer_avail(src);
102 ret = dvb_ringbuffer_read_user(src, buf, avail);
109 return (count - todo) ? (count - todo) : ret;
112 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
114 struct list_head *head, *pos;
116 head = demux->get_frontends(demux);
119 list_for_each(pos, head)
120 if (DMX_FE_ENTRY(pos)->source == type)
121 return DMX_FE_ENTRY(pos);
126 static int dvb_dvr_open(struct inode *inode, struct file *file)
128 struct dvb_device *dvbdev = file->private_data;
129 struct dmxdev *dmxdev = dvbdev->priv;
130 struct dmx_frontend *front;
132 bool need_ringbuffer = false;
134 const bool need_ringbuffer = true;
137 dprintk("%s\n", __func__);
139 if (mutex_lock_interruptible(&dmxdev->mutex))
143 mutex_unlock(&dmxdev->mutex);
148 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
149 need_ringbuffer = true;
151 if ((file->f_flags & O_ACCMODE) == O_RDWR) {
152 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
153 mutex_unlock(&dmxdev->mutex);
159 if (need_ringbuffer) {
162 if (!dvbdev->readers) {
163 mutex_unlock(&dmxdev->mutex);
166 mem = vmalloc(DVR_BUFFER_SIZE);
168 mutex_unlock(&dmxdev->mutex);
171 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
172 dvb_vb2_init(&dmxdev->dvr_vb2_ctx, "dvr",
173 file->f_flags & O_NONBLOCK);
177 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
178 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
180 if (!dmxdev->demux->write) {
181 mutex_unlock(&dmxdev->mutex);
185 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
188 mutex_unlock(&dmxdev->mutex);
191 dmxdev->demux->disconnect_frontend(dmxdev->demux);
192 dmxdev->demux->connect_frontend(dmxdev->demux, front);
195 mutex_unlock(&dmxdev->mutex);
199 static int dvb_dvr_release(struct inode *inode, struct file *file)
201 struct dvb_device *dvbdev = file->private_data;
202 struct dmxdev *dmxdev = dvbdev->priv;
204 bool need_ringbuffer = false;
206 const bool need_ringbuffer = true;
209 mutex_lock(&dmxdev->mutex);
211 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
212 dmxdev->demux->disconnect_frontend(dmxdev->demux);
213 dmxdev->demux->connect_frontend(dmxdev->demux,
214 dmxdev->dvr_orig_fe);
217 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
218 need_ringbuffer = true;
221 if (need_ringbuffer) {
222 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
223 dvb_vb2_stream_off(&dmxdev->dvr_vb2_ctx);
224 dvb_vb2_release(&dmxdev->dvr_vb2_ctx);
226 if (dmxdev->dvr_buffer.data) {
227 void *mem = dmxdev->dvr_buffer.data;
230 spin_lock_irq(&dmxdev->lock);
231 dmxdev->dvr_buffer.data = NULL;
232 spin_unlock_irq(&dmxdev->lock);
238 if (dvbdev->users == 1 && dmxdev->exit == 1) {
239 mutex_unlock(&dmxdev->mutex);
240 wake_up(&dvbdev->wait_queue);
242 mutex_unlock(&dmxdev->mutex);
247 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
248 size_t count, loff_t *ppos)
250 struct dvb_device *dvbdev = file->private_data;
251 struct dmxdev *dmxdev = dvbdev->priv;
254 if (!dmxdev->demux->write)
256 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
258 if (mutex_lock_interruptible(&dmxdev->mutex))
262 mutex_unlock(&dmxdev->mutex);
265 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
266 mutex_unlock(&dmxdev->mutex);
270 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
273 struct dvb_device *dvbdev = file->private_data;
274 struct dmxdev *dmxdev = dvbdev->priv;
279 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
280 file->f_flags & O_NONBLOCK,
284 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
287 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
291 dprintk("%s\n", __func__);
293 if (buf->size == size)
298 newmem = vmalloc(size);
304 spin_lock_irq(&dmxdev->lock);
308 /* reset and not flush in case the buffer shrinks */
309 dvb_ringbuffer_reset(buf);
310 spin_unlock_irq(&dmxdev->lock);
317 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
318 *dmxdevfilter, int state)
320 spin_lock_irq(&dmxdevfilter->dev->lock);
321 dmxdevfilter->state = state;
322 spin_unlock_irq(&dmxdevfilter->dev->lock);
325 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
328 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
332 if (buf->size == size)
336 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
339 newmem = vmalloc(size);
345 spin_lock_irq(&dmxdevfilter->dev->lock);
349 /* reset and not flush in case the buffer shrinks */
350 dvb_ringbuffer_reset(buf);
351 spin_unlock_irq(&dmxdevfilter->dev->lock);
358 static void dvb_dmxdev_filter_timeout(struct timer_list *t)
360 struct dmxdev_filter *dmxdevfilter = from_timer(dmxdevfilter, t, timer);
362 dmxdevfilter->buffer.error = -ETIMEDOUT;
363 spin_lock_irq(&dmxdevfilter->dev->lock);
364 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
365 spin_unlock_irq(&dmxdevfilter->dev->lock);
366 wake_up(&dmxdevfilter->buffer.queue);
369 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
371 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
373 del_timer(&dmxdevfilter->timer);
375 dmxdevfilter->timer.expires =
376 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
377 add_timer(&dmxdevfilter->timer);
381 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
382 const u8 *buffer2, size_t buffer2_len,
383 struct dmx_section_filter *filter)
385 struct dmxdev_filter *dmxdevfilter = filter->priv;
388 if (!dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx) &&
389 dmxdevfilter->buffer.error) {
390 wake_up(&dmxdevfilter->buffer.queue);
393 spin_lock(&dmxdevfilter->dev->lock);
394 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
395 spin_unlock(&dmxdevfilter->dev->lock);
398 del_timer(&dmxdevfilter->timer);
399 dprintk("section callback %*ph\n", 6, buffer1);
400 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx)) {
401 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
402 buffer1, buffer1_len);
403 if (ret == buffer1_len)
404 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
405 buffer2, buffer2_len);
407 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
408 buffer1, buffer1_len);
409 if (ret == buffer1_len) {
410 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
411 buffer2, buffer2_len);
415 dmxdevfilter->buffer.error = ret;
416 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
417 dmxdevfilter->state = DMXDEV_STATE_DONE;
418 spin_unlock(&dmxdevfilter->dev->lock);
419 wake_up(&dmxdevfilter->buffer.queue);
423 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
424 const u8 *buffer2, size_t buffer2_len,
425 struct dmx_ts_feed *feed)
427 struct dmxdev_filter *dmxdevfilter = feed->priv;
428 struct dvb_ringbuffer *buffer;
430 struct dvb_vb2_ctx *ctx;
434 spin_lock(&dmxdevfilter->dev->lock);
435 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
436 spin_unlock(&dmxdevfilter->dev->lock);
440 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP ||
441 dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) {
442 buffer = &dmxdevfilter->buffer;
444 ctx = &dmxdevfilter->vb2_ctx;
447 buffer = &dmxdevfilter->dev->dvr_buffer;
449 ctx = &dmxdevfilter->dev->dvr_vb2_ctx;
453 if (dvb_vb2_is_streaming(ctx)) {
454 ret = dvb_vb2_fill_buffer(ctx, buffer1, buffer1_len);
455 if (ret == buffer1_len)
456 ret = dvb_vb2_fill_buffer(ctx, buffer2, buffer2_len);
459 spin_unlock(&dmxdevfilter->dev->lock);
460 wake_up(&buffer->queue);
463 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
464 if (ret == buffer1_len)
465 ret = dvb_dmxdev_buffer_write(buffer,
466 buffer2, buffer2_len);
470 spin_unlock(&dmxdevfilter->dev->lock);
471 wake_up(&buffer->queue);
475 /* stop feed but only mark the specified filter as stopped (state set) */
476 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
478 struct dmxdev_feed *feed;
480 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
482 switch (dmxdevfilter->type) {
483 case DMXDEV_TYPE_SEC:
484 del_timer(&dmxdevfilter->timer);
485 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
487 case DMXDEV_TYPE_PES:
488 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
489 feed->ts->stop_filtering(feed->ts);
497 /* start feed associated with the specified filter */
498 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
500 struct dmxdev_feed *feed;
503 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
505 switch (filter->type) {
506 case DMXDEV_TYPE_SEC:
507 return filter->feed.sec->start_filtering(filter->feed.sec);
508 case DMXDEV_TYPE_PES:
509 list_for_each_entry(feed, &filter->feed.ts, next) {
510 ret = feed->ts->start_filtering(feed->ts);
512 dvb_dmxdev_feed_stop(filter);
524 /* restart section feed if it has filters left associated with it,
525 otherwise release the feed */
526 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
529 struct dmxdev *dmxdev = filter->dev;
530 u16 pid = filter->params.sec.pid;
532 for (i = 0; i < dmxdev->filternum; i++)
533 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
534 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
535 dmxdev->filter[i].params.sec.pid == pid) {
536 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
540 filter->dev->demux->release_section_feed(dmxdev->demux,
546 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
548 struct dmxdev_feed *feed;
549 struct dmx_demux *demux;
551 if (dmxdevfilter->state < DMXDEV_STATE_GO)
554 switch (dmxdevfilter->type) {
555 case DMXDEV_TYPE_SEC:
556 if (!dmxdevfilter->feed.sec)
558 dvb_dmxdev_feed_stop(dmxdevfilter);
559 if (dmxdevfilter->filter.sec)
560 dmxdevfilter->feed.sec->
561 release_filter(dmxdevfilter->feed.sec,
562 dmxdevfilter->filter.sec);
563 dvb_dmxdev_feed_restart(dmxdevfilter);
564 dmxdevfilter->feed.sec = NULL;
566 case DMXDEV_TYPE_PES:
567 dvb_dmxdev_feed_stop(dmxdevfilter);
568 demux = dmxdevfilter->dev->demux;
569 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
570 demux->release_ts_feed(demux, feed->ts);
575 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
580 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
584 static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
586 struct dmxdev_feed *feed, *tmp;
588 /* delete all PIDs */
589 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
590 list_del(&feed->next);
594 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
597 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
599 if (dmxdevfilter->state < DMXDEV_STATE_SET)
602 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
603 dvb_dmxdev_delete_pids(dmxdevfilter);
605 dmxdevfilter->type = DMXDEV_TYPE_NONE;
606 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
610 static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
611 struct dmxdev_filter *filter,
612 struct dmxdev_feed *feed)
615 struct dmx_pes_filter_params *para = &filter->params.pes;
616 enum dmx_output otype;
619 enum dmx_ts_pes ts_pes;
620 struct dmx_ts_feed *tsfeed;
623 otype = para->output;
625 ts_pes = para->pes_type;
627 if (ts_pes < DMX_PES_OTHER)
628 ts_type = TS_DECODER;
632 if (otype == DMX_OUT_TS_TAP)
633 ts_type |= TS_PACKET;
634 else if (otype == DMX_OUT_TSDEMUX_TAP)
635 ts_type |= TS_PACKET | TS_DEMUX;
636 else if (otype == DMX_OUT_TAP)
637 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
639 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
640 dvb_dmxdev_ts_callback);
645 tsfeed->priv = filter;
647 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
649 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
653 ret = tsfeed->start_filtering(tsfeed);
655 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
662 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
664 struct dmxdev *dmxdev = filter->dev;
665 struct dmxdev_feed *feed;
669 if (filter->state < DMXDEV_STATE_SET)
672 if (filter->state >= DMXDEV_STATE_GO)
673 dvb_dmxdev_filter_stop(filter);
675 if (!filter->buffer.data) {
676 mem = vmalloc(filter->buffer.size);
679 spin_lock_irq(&filter->dev->lock);
680 filter->buffer.data = mem;
681 spin_unlock_irq(&filter->dev->lock);
684 dvb_ringbuffer_flush(&filter->buffer);
686 switch (filter->type) {
687 case DMXDEV_TYPE_SEC:
689 struct dmx_sct_filter_params *para = &filter->params.sec;
690 struct dmx_section_filter **secfilter = &filter->filter.sec;
691 struct dmx_section_feed **secfeed = &filter->feed.sec;
697 /* find active filter/feed with same PID */
698 for (i = 0; i < dmxdev->filternum; i++) {
699 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
700 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
701 dmxdev->filter[i].params.sec.pid == para->pid) {
702 *secfeed = dmxdev->filter[i].feed.sec;
707 /* if no feed found, try to allocate new one */
709 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
711 dvb_dmxdev_section_callback);
713 pr_err("DVB (%s): could not alloc feed\n",
718 ret = (*secfeed)->set(*secfeed, para->pid,
719 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
721 pr_err("DVB (%s): could not set feed\n",
723 dvb_dmxdev_feed_restart(filter);
727 dvb_dmxdev_feed_stop(filter);
730 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
732 dvb_dmxdev_feed_restart(filter);
733 filter->feed.sec->start_filtering(*secfeed);
734 dprintk("could not get filter\n");
738 (*secfilter)->priv = filter;
740 memcpy(&((*secfilter)->filter_value[3]),
741 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
742 memcpy(&(*secfilter)->filter_mask[3],
743 ¶->filter.mask[1], DMX_FILTER_SIZE - 1);
744 memcpy(&(*secfilter)->filter_mode[3],
745 ¶->filter.mode[1], DMX_FILTER_SIZE - 1);
747 (*secfilter)->filter_value[0] = para->filter.filter[0];
748 (*secfilter)->filter_mask[0] = para->filter.mask[0];
749 (*secfilter)->filter_mode[0] = para->filter.mode[0];
750 (*secfilter)->filter_mask[1] = 0;
751 (*secfilter)->filter_mask[2] = 0;
755 ret = filter->feed.sec->start_filtering(filter->feed.sec);
759 dvb_dmxdev_filter_timer(filter);
762 case DMXDEV_TYPE_PES:
763 list_for_each_entry(feed, &filter->feed.ts, next) {
764 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
766 dvb_dmxdev_filter_stop(filter);
775 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
779 static int dvb_demux_open(struct inode *inode, struct file *file)
781 struct dvb_device *dvbdev = file->private_data;
782 struct dmxdev *dmxdev = dvbdev->priv;
784 struct dmxdev_filter *dmxdevfilter;
789 if (mutex_lock_interruptible(&dmxdev->mutex))
792 for (i = 0; i < dmxdev->filternum; i++)
793 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
796 if (i == dmxdev->filternum) {
797 mutex_unlock(&dmxdev->mutex);
801 dmxdevfilter = &dmxdev->filter[i];
802 mutex_init(&dmxdevfilter->mutex);
803 file->private_data = dmxdevfilter;
805 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
806 dvb_vb2_init(&dmxdevfilter->vb2_ctx, "demux_filter",
807 file->f_flags & O_NONBLOCK);
808 dmxdevfilter->type = DMXDEV_TYPE_NONE;
809 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
810 timer_setup(&dmxdevfilter->timer, dvb_dmxdev_filter_timeout, 0);
814 mutex_unlock(&dmxdev->mutex);
818 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
819 struct dmxdev_filter *dmxdevfilter)
821 mutex_lock(&dmxdev->mutex);
822 mutex_lock(&dmxdevfilter->mutex);
823 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
824 dvb_vb2_stream_off(&dmxdevfilter->vb2_ctx);
825 dvb_vb2_release(&dmxdevfilter->vb2_ctx);
828 dvb_dmxdev_filter_stop(dmxdevfilter);
829 dvb_dmxdev_filter_reset(dmxdevfilter);
831 if (dmxdevfilter->buffer.data) {
832 void *mem = dmxdevfilter->buffer.data;
834 spin_lock_irq(&dmxdev->lock);
835 dmxdevfilter->buffer.data = NULL;
836 spin_unlock_irq(&dmxdev->lock);
840 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
841 wake_up(&dmxdevfilter->buffer.queue);
842 mutex_unlock(&dmxdevfilter->mutex);
843 mutex_unlock(&dmxdev->mutex);
847 static inline void invert_mode(struct dmx_filter *filter)
851 for (i = 0; i < DMX_FILTER_SIZE; i++)
852 filter->mode[i] ^= 0xff;
855 static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
856 struct dmxdev_filter *filter, u16 pid)
858 struct dmxdev_feed *feed;
860 if ((filter->type != DMXDEV_TYPE_PES) ||
861 (filter->state < DMXDEV_STATE_SET))
864 /* only TS packet filters may have multiple PIDs */
865 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
866 (!list_empty(&filter->feed.ts)))
869 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
874 list_add(&feed->next, &filter->feed.ts);
876 if (filter->state >= DMXDEV_STATE_GO)
877 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
882 static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
883 struct dmxdev_filter *filter, u16 pid)
885 struct dmxdev_feed *feed, *tmp;
887 if ((filter->type != DMXDEV_TYPE_PES) ||
888 (filter->state < DMXDEV_STATE_SET))
891 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
892 if ((feed->pid == pid) && (feed->ts != NULL)) {
893 feed->ts->stop_filtering(feed->ts);
894 filter->dev->demux->release_ts_feed(filter->dev->demux,
896 list_del(&feed->next);
904 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
905 struct dmxdev_filter *dmxdevfilter,
906 struct dmx_sct_filter_params *params)
908 dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
909 __func__, params->pid, params->flags, params->timeout);
911 dvb_dmxdev_filter_stop(dmxdevfilter);
913 dmxdevfilter->type = DMXDEV_TYPE_SEC;
914 memcpy(&dmxdevfilter->params.sec,
915 params, sizeof(struct dmx_sct_filter_params));
916 invert_mode(&dmxdevfilter->params.sec.filter);
917 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
919 if (params->flags & DMX_IMMEDIATE_START)
920 return dvb_dmxdev_filter_start(dmxdevfilter);
925 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
926 struct dmxdev_filter *dmxdevfilter,
927 struct dmx_pes_filter_params *params)
931 dvb_dmxdev_filter_stop(dmxdevfilter);
932 dvb_dmxdev_filter_reset(dmxdevfilter);
934 if ((unsigned int)params->pes_type > DMX_PES_OTHER)
937 dmxdevfilter->type = DMXDEV_TYPE_PES;
938 memcpy(&dmxdevfilter->params, params,
939 sizeof(struct dmx_pes_filter_params));
940 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
942 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
944 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
945 dmxdevfilter->params.pes.pid);
949 if (params->flags & DMX_IMMEDIATE_START)
950 return dvb_dmxdev_filter_start(dmxdevfilter);
955 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
956 struct file *file, char __user *buf,
957 size_t count, loff_t *ppos)
962 if (dfil->todo <= 0) {
963 hcount = 3 + dfil->todo;
966 result = dvb_dmxdev_buffer_read(&dfil->buffer,
967 file->f_flags & O_NONBLOCK,
973 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
978 dfil->todo -= result;
981 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
985 if (count > dfil->todo)
987 result = dvb_dmxdev_buffer_read(&dfil->buffer,
988 file->f_flags & O_NONBLOCK,
992 dfil->todo -= result;
993 return (result + done);
997 dvb_demux_read(struct file *file, char __user *buf, size_t count,
1000 struct dmxdev_filter *dmxdevfilter = file->private_data;
1003 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
1004 return -ERESTARTSYS;
1006 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
1007 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
1009 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
1010 file->f_flags & O_NONBLOCK,
1013 mutex_unlock(&dmxdevfilter->mutex);
1017 static int dvb_demux_do_ioctl(struct file *file,
1018 unsigned int cmd, void *parg)
1020 struct dmxdev_filter *dmxdevfilter = file->private_data;
1021 struct dmxdev *dmxdev = dmxdevfilter->dev;
1022 unsigned long arg = (unsigned long)parg;
1025 if (mutex_lock_interruptible(&dmxdev->mutex))
1026 return -ERESTARTSYS;
1030 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1031 mutex_unlock(&dmxdev->mutex);
1032 return -ERESTARTSYS;
1034 if (dmxdevfilter->state < DMXDEV_STATE_SET)
1037 ret = dvb_dmxdev_filter_start(dmxdevfilter);
1038 mutex_unlock(&dmxdevfilter->mutex);
1042 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1043 mutex_unlock(&dmxdev->mutex);
1044 return -ERESTARTSYS;
1046 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
1047 mutex_unlock(&dmxdevfilter->mutex);
1050 case DMX_SET_FILTER:
1051 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1052 mutex_unlock(&dmxdev->mutex);
1053 return -ERESTARTSYS;
1055 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
1056 mutex_unlock(&dmxdevfilter->mutex);
1059 case DMX_SET_PES_FILTER:
1060 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1061 mutex_unlock(&dmxdev->mutex);
1062 return -ERESTARTSYS;
1064 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1065 mutex_unlock(&dmxdevfilter->mutex);
1068 case DMX_SET_BUFFER_SIZE:
1069 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1070 mutex_unlock(&dmxdev->mutex);
1071 return -ERESTARTSYS;
1073 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1074 mutex_unlock(&dmxdevfilter->mutex);
1077 case DMX_GET_PES_PIDS:
1078 if (!dmxdev->demux->get_pes_pids) {
1082 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1086 if (!dmxdev->demux->get_stc) {
1090 ret = dmxdev->demux->get_stc(dmxdev->demux,
1091 ((struct dmx_stc *)parg)->num,
1092 &((struct dmx_stc *)parg)->stc,
1093 &((struct dmx_stc *)parg)->base);
1097 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1101 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1102 mutex_unlock(&dmxdevfilter->mutex);
1105 case DMX_REMOVE_PID:
1106 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1110 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1111 mutex_unlock(&dmxdevfilter->mutex);
1116 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1117 mutex_unlock(&dmxdev->mutex);
1118 return -ERESTARTSYS;
1120 ret = dvb_vb2_reqbufs(&dmxdevfilter->vb2_ctx, parg);
1121 mutex_unlock(&dmxdevfilter->mutex);
1125 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1126 mutex_unlock(&dmxdev->mutex);
1127 return -ERESTARTSYS;
1129 ret = dvb_vb2_querybuf(&dmxdevfilter->vb2_ctx, parg);
1130 mutex_unlock(&dmxdevfilter->mutex);
1134 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1135 mutex_unlock(&dmxdev->mutex);
1136 return -ERESTARTSYS;
1138 ret = dvb_vb2_expbuf(&dmxdevfilter->vb2_ctx, parg);
1139 mutex_unlock(&dmxdevfilter->mutex);
1143 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1144 mutex_unlock(&dmxdev->mutex);
1145 return -ERESTARTSYS;
1147 ret = dvb_vb2_qbuf(&dmxdevfilter->vb2_ctx, parg);
1148 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1149 ret = dvb_vb2_stream_on(&dmxdevfilter->vb2_ctx);
1150 mutex_unlock(&dmxdevfilter->mutex);
1154 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1155 mutex_unlock(&dmxdev->mutex);
1156 return -ERESTARTSYS;
1158 ret = dvb_vb2_dqbuf(&dmxdevfilter->vb2_ctx, parg);
1159 mutex_unlock(&dmxdevfilter->mutex);
1166 mutex_unlock(&dmxdev->mutex);
1170 static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1173 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1176 static __poll_t dvb_demux_poll(struct file *file, poll_table *wait)
1178 struct dmxdev_filter *dmxdevfilter = file->private_data;
1181 if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
1183 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1184 return dvb_vb2_poll(&dmxdevfilter->vb2_ctx, file, wait);
1186 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1188 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1189 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1190 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1193 if (dmxdevfilter->buffer.error)
1194 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1196 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1197 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1203 static int dvb_demux_mmap(struct file *file, struct vm_area_struct *vma)
1205 struct dmxdev_filter *dmxdevfilter = file->private_data;
1206 struct dmxdev *dmxdev = dmxdevfilter->dev;
1209 if (mutex_lock_interruptible(&dmxdev->mutex))
1210 return -ERESTARTSYS;
1212 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1213 mutex_unlock(&dmxdev->mutex);
1214 return -ERESTARTSYS;
1216 ret = dvb_vb2_mmap(&dmxdevfilter->vb2_ctx, vma);
1218 mutex_unlock(&dmxdevfilter->mutex);
1219 mutex_unlock(&dmxdev->mutex);
1225 static int dvb_demux_release(struct inode *inode, struct file *file)
1227 struct dmxdev_filter *dmxdevfilter = file->private_data;
1228 struct dmxdev *dmxdev = dmxdevfilter->dev;
1231 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1233 mutex_lock(&dmxdev->mutex);
1234 dmxdev->dvbdev->users--;
1235 if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
1236 mutex_unlock(&dmxdev->mutex);
1237 wake_up(&dmxdev->dvbdev->wait_queue);
1239 mutex_unlock(&dmxdev->mutex);
1244 static const struct file_operations dvb_demux_fops = {
1245 .owner = THIS_MODULE,
1246 .read = dvb_demux_read,
1247 .unlocked_ioctl = dvb_demux_ioctl,
1248 .open = dvb_demux_open,
1249 .release = dvb_demux_release,
1250 .poll = dvb_demux_poll,
1251 .llseek = default_llseek,
1253 .mmap = dvb_demux_mmap,
1257 static const struct dvb_device dvbdev_demux = {
1261 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1262 .name = "dvb-demux",
1264 .fops = &dvb_demux_fops
1267 static int dvb_dvr_do_ioctl(struct file *file,
1268 unsigned int cmd, void *parg)
1270 struct dvb_device *dvbdev = file->private_data;
1271 struct dmxdev *dmxdev = dvbdev->priv;
1272 unsigned long arg = (unsigned long)parg;
1275 if (mutex_lock_interruptible(&dmxdev->mutex))
1276 return -ERESTARTSYS;
1279 case DMX_SET_BUFFER_SIZE:
1280 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1285 ret = dvb_vb2_reqbufs(&dmxdev->dvr_vb2_ctx, parg);
1289 ret = dvb_vb2_querybuf(&dmxdev->dvr_vb2_ctx, parg);
1293 ret = dvb_vb2_expbuf(&dmxdev->dvr_vb2_ctx, parg);
1297 ret = dvb_vb2_qbuf(&dmxdev->dvr_vb2_ctx, parg);
1298 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1299 ret = dvb_vb2_stream_on(&dmxdev->dvr_vb2_ctx);
1303 ret = dvb_vb2_dqbuf(&dmxdev->dvr_vb2_ctx, parg);
1310 mutex_unlock(&dmxdev->mutex);
1314 static long dvb_dvr_ioctl(struct file *file,
1315 unsigned int cmd, unsigned long arg)
1317 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1320 static __poll_t dvb_dvr_poll(struct file *file, poll_table *wait)
1322 struct dvb_device *dvbdev = file->private_data;
1323 struct dmxdev *dmxdev = dvbdev->priv;
1326 bool need_ringbuffer = false;
1328 const bool need_ringbuffer = true;
1331 dprintk("%s\n", __func__);
1335 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1336 return dvb_vb2_poll(&dmxdev->dvr_vb2_ctx, file, wait);
1338 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1341 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
1342 need_ringbuffer = true;
1344 if (need_ringbuffer) {
1345 if (dmxdev->dvr_buffer.error)
1346 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1348 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1349 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1351 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1357 static int dvb_dvr_mmap(struct file *file, struct vm_area_struct *vma)
1359 struct dvb_device *dvbdev = file->private_data;
1360 struct dmxdev *dmxdev = dvbdev->priv;
1366 if (mutex_lock_interruptible(&dmxdev->mutex))
1367 return -ERESTARTSYS;
1369 ret = dvb_vb2_mmap(&dmxdev->dvr_vb2_ctx, vma);
1370 mutex_unlock(&dmxdev->mutex);
1375 static const struct file_operations dvb_dvr_fops = {
1376 .owner = THIS_MODULE,
1377 .read = dvb_dvr_read,
1378 .write = dvb_dvr_write,
1379 .unlocked_ioctl = dvb_dvr_ioctl,
1380 .open = dvb_dvr_open,
1381 .release = dvb_dvr_release,
1382 .poll = dvb_dvr_poll,
1383 .llseek = default_llseek,
1385 .mmap = dvb_dvr_mmap,
1389 static const struct dvb_device dvbdev_dvr = {
1393 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1396 .fops = &dvb_dvr_fops
1398 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1402 if (dmxdev->demux->open(dmxdev->demux) < 0)
1405 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1406 if (!dmxdev->filter)
1409 mutex_init(&dmxdev->mutex);
1410 spin_lock_init(&dmxdev->lock);
1411 for (i = 0; i < dmxdev->filternum; i++) {
1412 dmxdev->filter[i].dev = dmxdev;
1413 dmxdev->filter[i].buffer.data = NULL;
1414 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1418 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1419 DVB_DEVICE_DEMUX, dmxdev->filternum);
1420 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1421 dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
1423 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1428 EXPORT_SYMBOL(dvb_dmxdev_init);
1430 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1433 if (dmxdev->dvbdev->users > 1) {
1434 wait_event(dmxdev->dvbdev->wait_queue,
1435 dmxdev->dvbdev->users == 1);
1437 if (dmxdev->dvr_dvbdev->users > 1) {
1438 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1439 dmxdev->dvr_dvbdev->users == 1);
1442 dvb_unregister_device(dmxdev->dvbdev);
1443 dvb_unregister_device(dmxdev->dvr_dvbdev);
1445 vfree(dmxdev->filter);
1446 dmxdev->filter = NULL;
1447 dmxdev->demux->close(dmxdev->demux);
1450 EXPORT_SYMBOL(dvb_dmxdev_release);