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19#define pr_fmt(fmt) "dmxdev: " fmt
20
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 "dmxdev.h"
31
32static int debug;
33
34module_param(debug, int, 0644);
35MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
36
37#define dprintk(fmt, arg...) do { \
38 if (debug) \
39 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
40 __func__, ##arg); \
41} while (0)
42
43static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
44 const u8 *src, size_t len)
45{
46 ssize_t free;
47
48 if (!len)
49 return 0;
50 if (!buf->data)
51 return 0;
52
53 free = dvb_ringbuffer_free(buf);
54 if (len > free) {
55 dprintk("buffer overflow\n");
56 return -EOVERFLOW;
57 }
58
59 return dvb_ringbuffer_write(buf, src, len);
60}
61
62static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
63 int non_blocking, char __user *buf,
64 size_t count, loff_t *ppos)
65{
66 size_t todo;
67 ssize_t avail;
68 ssize_t ret = 0;
69
70 if (!src->data)
71 return 0;
72
73 if (src->error) {
74 ret = src->error;
75 dvb_ringbuffer_flush(src);
76 return ret;
77 }
78
79 for (todo = count; todo > 0; todo -= ret) {
80 if (non_blocking && dvb_ringbuffer_empty(src)) {
81 ret = -EWOULDBLOCK;
82 break;
83 }
84
85 ret = wait_event_interruptible(src->queue,
86 !dvb_ringbuffer_empty(src) ||
87 (src->error != 0));
88 if (ret < 0)
89 break;
90
91 if (src->error) {
92 ret = src->error;
93 dvb_ringbuffer_flush(src);
94 break;
95 }
96
97 avail = dvb_ringbuffer_avail(src);
98 if (avail > todo)
99 avail = todo;
100
101 ret = dvb_ringbuffer_read_user(src, buf, avail);
102 if (ret < 0)
103 break;
104
105 buf += ret;
106 }
107
108 return (count - todo) ? (count - todo) : ret;
109}
110
111static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
112{
113 struct list_head *head, *pos;
114
115 head = demux->get_frontends(demux);
116 if (!head)
117 return NULL;
118 list_for_each(pos, head)
119 if (DMX_FE_ENTRY(pos)->source == type)
120 return DMX_FE_ENTRY(pos);
121
122 return NULL;
123}
124
125static int dvb_dvr_open(struct inode *inode, struct file *file)
126{
127 struct dvb_device *dvbdev = file->private_data;
128 struct dmxdev *dmxdev = dvbdev->priv;
129 struct dmx_frontend *front;
130
131 dprintk("%s\n", __func__);
132
133 if (mutex_lock_interruptible(&dmxdev->mutex))
134 return -ERESTARTSYS;
135
136 if (dmxdev->exit) {
137 mutex_unlock(&dmxdev->mutex);
138 return -ENODEV;
139 }
140
141 if ((file->f_flags & O_ACCMODE) == O_RDWR) {
142 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
143 mutex_unlock(&dmxdev->mutex);
144 return -EOPNOTSUPP;
145 }
146 }
147
148 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
149 void *mem;
150
151 if (!dvbdev->readers) {
152 mutex_unlock(&dmxdev->mutex);
153 return -EBUSY;
154 }
155 mem = vmalloc(DVR_BUFFER_SIZE);
156 if (!mem) {
157 mutex_unlock(&dmxdev->mutex);
158 return -ENOMEM;
159 }
160 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
161 dvbdev->readers--;
162 }
163
164 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
165 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
166
167 if (!dmxdev->demux->write) {
168 mutex_unlock(&dmxdev->mutex);
169 return -EOPNOTSUPP;
170 }
171
172 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
173
174 if (!front) {
175 mutex_unlock(&dmxdev->mutex);
176 return -EINVAL;
177 }
178 dmxdev->demux->disconnect_frontend(dmxdev->demux);
179 dmxdev->demux->connect_frontend(dmxdev->demux, front);
180 }
181 dvbdev->users++;
182 mutex_unlock(&dmxdev->mutex);
183 return 0;
184}
185
186static int dvb_dvr_release(struct inode *inode, struct file *file)
187{
188 struct dvb_device *dvbdev = file->private_data;
189 struct dmxdev *dmxdev = dvbdev->priv;
190
191 mutex_lock(&dmxdev->mutex);
192
193 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
194 dmxdev->demux->disconnect_frontend(dmxdev->demux);
195 dmxdev->demux->connect_frontend(dmxdev->demux,
196 dmxdev->dvr_orig_fe);
197 }
198 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
199 dvbdev->readers++;
200 if (dmxdev->dvr_buffer.data) {
201 void *mem = dmxdev->dvr_buffer.data;
202
203 mb();
204 spin_lock_irq(&dmxdev->lock);
205 dmxdev->dvr_buffer.data = NULL;
206 spin_unlock_irq(&dmxdev->lock);
207 vfree(mem);
208 }
209 }
210
211 dvbdev->users--;
212 if (dvbdev->users == 1 && dmxdev->exit == 1) {
213 mutex_unlock(&dmxdev->mutex);
214 wake_up(&dvbdev->wait_queue);
215 } else
216 mutex_unlock(&dmxdev->mutex);
217
218 return 0;
219}
220
221static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
222 size_t count, loff_t *ppos)
223{
224 struct dvb_device *dvbdev = file->private_data;
225 struct dmxdev *dmxdev = dvbdev->priv;
226 int ret;
227
228 if (!dmxdev->demux->write)
229 return -EOPNOTSUPP;
230 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
231 return -EINVAL;
232 if (mutex_lock_interruptible(&dmxdev->mutex))
233 return -ERESTARTSYS;
234
235 if (dmxdev->exit) {
236 mutex_unlock(&dmxdev->mutex);
237 return -ENODEV;
238 }
239 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
240 mutex_unlock(&dmxdev->mutex);
241 return ret;
242}
243
244static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
245 loff_t *ppos)
246{
247 struct dvb_device *dvbdev = file->private_data;
248 struct dmxdev *dmxdev = dvbdev->priv;
249
250 if (dmxdev->exit)
251 return -ENODEV;
252
253 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
254 file->f_flags & O_NONBLOCK,
255 buf, count, ppos);
256}
257
258static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
259 unsigned long size)
260{
261 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
262 void *newmem;
263 void *oldmem;
264
265 dprintk("%s\n", __func__);
266
267 if (buf->size == size)
268 return 0;
269 if (!size)
270 return -EINVAL;
271
272 newmem = vmalloc(size);
273 if (!newmem)
274 return -ENOMEM;
275
276 oldmem = buf->data;
277
278 spin_lock_irq(&dmxdev->lock);
279 buf->data = newmem;
280 buf->size = size;
281
282
283 dvb_ringbuffer_reset(buf);
284 spin_unlock_irq(&dmxdev->lock);
285
286 vfree(oldmem);
287
288 return 0;
289}
290
291static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
292 *dmxdevfilter, int state)
293{
294 spin_lock_irq(&dmxdevfilter->dev->lock);
295 dmxdevfilter->state = state;
296 spin_unlock_irq(&dmxdevfilter->dev->lock);
297}
298
299static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
300 unsigned long size)
301{
302 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
303 void *newmem;
304 void *oldmem;
305
306 if (buf->size == size)
307 return 0;
308 if (!size)
309 return -EINVAL;
310 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
311 return -EBUSY;
312
313 newmem = vmalloc(size);
314 if (!newmem)
315 return -ENOMEM;
316
317 oldmem = buf->data;
318
319 spin_lock_irq(&dmxdevfilter->dev->lock);
320 buf->data = newmem;
321 buf->size = size;
322
323
324 dvb_ringbuffer_reset(buf);
325 spin_unlock_irq(&dmxdevfilter->dev->lock);
326
327 vfree(oldmem);
328
329 return 0;
330}
331
332static void dvb_dmxdev_filter_timeout(unsigned long data)
333{
334 struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
335
336 dmxdevfilter->buffer.error = -ETIMEDOUT;
337 spin_lock_irq(&dmxdevfilter->dev->lock);
338 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
339 spin_unlock_irq(&dmxdevfilter->dev->lock);
340 wake_up(&dmxdevfilter->buffer.queue);
341}
342
343static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
344{
345 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
346
347 del_timer(&dmxdevfilter->timer);
348 if (para->timeout) {
349 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
350 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
351 dmxdevfilter->timer.expires =
352 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
353 add_timer(&dmxdevfilter->timer);
354 }
355}
356
357static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
358 const u8 *buffer2, size_t buffer2_len,
359 struct dmx_section_filter *filter)
360{
361 struct dmxdev_filter *dmxdevfilter = filter->priv;
362 int ret;
363
364 if (dmxdevfilter->buffer.error) {
365 wake_up(&dmxdevfilter->buffer.queue);
366 return 0;
367 }
368 spin_lock(&dmxdevfilter->dev->lock);
369 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
370 spin_unlock(&dmxdevfilter->dev->lock);
371 return 0;
372 }
373 del_timer(&dmxdevfilter->timer);
374 dprintk("section callback %*ph\n", 6, buffer1);
375 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
376 buffer1_len);
377 if (ret == buffer1_len) {
378 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
379 buffer2_len);
380 }
381 if (ret < 0)
382 dmxdevfilter->buffer.error = ret;
383 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
384 dmxdevfilter->state = DMXDEV_STATE_DONE;
385 spin_unlock(&dmxdevfilter->dev->lock);
386 wake_up(&dmxdevfilter->buffer.queue);
387 return 0;
388}
389
390static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
391 const u8 *buffer2, size_t buffer2_len,
392 struct dmx_ts_feed *feed)
393{
394 struct dmxdev_filter *dmxdevfilter = feed->priv;
395 struct dvb_ringbuffer *buffer;
396 int ret;
397
398 spin_lock(&dmxdevfilter->dev->lock);
399 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
400 spin_unlock(&dmxdevfilter->dev->lock);
401 return 0;
402 }
403
404 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
405 || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
406 buffer = &dmxdevfilter->buffer;
407 else
408 buffer = &dmxdevfilter->dev->dvr_buffer;
409 if (buffer->error) {
410 spin_unlock(&dmxdevfilter->dev->lock);
411 wake_up(&buffer->queue);
412 return 0;
413 }
414 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
415 if (ret == buffer1_len)
416 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
417 if (ret < 0)
418 buffer->error = ret;
419 spin_unlock(&dmxdevfilter->dev->lock);
420 wake_up(&buffer->queue);
421 return 0;
422}
423
424
425static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
426{
427 struct dmxdev_feed *feed;
428
429 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
430
431 switch (dmxdevfilter->type) {
432 case DMXDEV_TYPE_SEC:
433 del_timer(&dmxdevfilter->timer);
434 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
435 break;
436 case DMXDEV_TYPE_PES:
437 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
438 feed->ts->stop_filtering(feed->ts);
439 break;
440 default:
441 return -EINVAL;
442 }
443 return 0;
444}
445
446
447static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
448{
449 struct dmxdev_feed *feed;
450 int ret;
451
452 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
453
454 switch (filter->type) {
455 case DMXDEV_TYPE_SEC:
456 return filter->feed.sec->start_filtering(filter->feed.sec);
457 case DMXDEV_TYPE_PES:
458 list_for_each_entry(feed, &filter->feed.ts, next) {
459 ret = feed->ts->start_filtering(feed->ts);
460 if (ret < 0) {
461 dvb_dmxdev_feed_stop(filter);
462 return ret;
463 }
464 }
465 break;
466 default:
467 return -EINVAL;
468 }
469
470 return 0;
471}
472
473
474
475static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
476{
477 int i;
478 struct dmxdev *dmxdev = filter->dev;
479 u16 pid = filter->params.sec.pid;
480
481 for (i = 0; i < dmxdev->filternum; i++)
482 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
483 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
484 dmxdev->filter[i].params.sec.pid == pid) {
485 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
486 return 0;
487 }
488
489 filter->dev->demux->release_section_feed(dmxdev->demux,
490 filter->feed.sec);
491
492 return 0;
493}
494
495static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
496{
497 struct dmxdev_feed *feed;
498 struct dmx_demux *demux;
499
500 if (dmxdevfilter->state < DMXDEV_STATE_GO)
501 return 0;
502
503 switch (dmxdevfilter->type) {
504 case DMXDEV_TYPE_SEC:
505 if (!dmxdevfilter->feed.sec)
506 break;
507 dvb_dmxdev_feed_stop(dmxdevfilter);
508 if (dmxdevfilter->filter.sec)
509 dmxdevfilter->feed.sec->
510 release_filter(dmxdevfilter->feed.sec,
511 dmxdevfilter->filter.sec);
512 dvb_dmxdev_feed_restart(dmxdevfilter);
513 dmxdevfilter->feed.sec = NULL;
514 break;
515 case DMXDEV_TYPE_PES:
516 dvb_dmxdev_feed_stop(dmxdevfilter);
517 demux = dmxdevfilter->dev->demux;
518 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
519 demux->release_ts_feed(demux, feed->ts);
520 feed->ts = NULL;
521 }
522 break;
523 default:
524 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
525 return 0;
526 return -EINVAL;
527 }
528
529 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
530 return 0;
531}
532
533static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
534{
535 struct dmxdev_feed *feed, *tmp;
536
537
538 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
539 list_del(&feed->next);
540 kfree(feed);
541 }
542
543 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
544}
545
546static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
547{
548 if (dmxdevfilter->state < DMXDEV_STATE_SET)
549 return 0;
550
551 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
552 dvb_dmxdev_delete_pids(dmxdevfilter);
553
554 dmxdevfilter->type = DMXDEV_TYPE_NONE;
555 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
556 return 0;
557}
558
559static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
560 struct dmxdev_filter *filter,
561 struct dmxdev_feed *feed)
562{
563 ktime_t timeout = 0;
564 struct dmx_pes_filter_params *para = &filter->params.pes;
565 dmx_output_t otype;
566 int ret;
567 int ts_type;
568 enum dmx_ts_pes ts_pes;
569 struct dmx_ts_feed *tsfeed;
570
571 feed->ts = NULL;
572 otype = para->output;
573
574 ts_pes = para->pes_type;
575
576 if (ts_pes < DMX_PES_OTHER)
577 ts_type = TS_DECODER;
578 else
579 ts_type = 0;
580
581 if (otype == DMX_OUT_TS_TAP)
582 ts_type |= TS_PACKET;
583 else if (otype == DMX_OUT_TSDEMUX_TAP)
584 ts_type |= TS_PACKET | TS_DEMUX;
585 else if (otype == DMX_OUT_TAP)
586 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
587
588 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
589 dvb_dmxdev_ts_callback);
590 if (ret < 0)
591 return ret;
592
593 tsfeed = feed->ts;
594 tsfeed->priv = filter;
595
596 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
597 if (ret < 0) {
598 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
599 return ret;
600 }
601
602 ret = tsfeed->start_filtering(tsfeed);
603 if (ret < 0) {
604 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
605 return ret;
606 }
607
608 return 0;
609}
610
611static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
612{
613 struct dmxdev *dmxdev = filter->dev;
614 struct dmxdev_feed *feed;
615 void *mem;
616 int ret, i;
617
618 if (filter->state < DMXDEV_STATE_SET)
619 return -EINVAL;
620
621 if (filter->state >= DMXDEV_STATE_GO)
622 dvb_dmxdev_filter_stop(filter);
623
624 if (!filter->buffer.data) {
625 mem = vmalloc(filter->buffer.size);
626 if (!mem)
627 return -ENOMEM;
628 spin_lock_irq(&filter->dev->lock);
629 filter->buffer.data = mem;
630 spin_unlock_irq(&filter->dev->lock);
631 }
632
633 dvb_ringbuffer_flush(&filter->buffer);
634
635 switch (filter->type) {
636 case DMXDEV_TYPE_SEC:
637 {
638 struct dmx_sct_filter_params *para = &filter->params.sec;
639 struct dmx_section_filter **secfilter = &filter->filter.sec;
640 struct dmx_section_feed **secfeed = &filter->feed.sec;
641
642 *secfilter = NULL;
643 *secfeed = NULL;
644
645
646
647 for (i = 0; i < dmxdev->filternum; i++) {
648 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
649 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
650 dmxdev->filter[i].params.sec.pid == para->pid) {
651 *secfeed = dmxdev->filter[i].feed.sec;
652 break;
653 }
654 }
655
656
657 if (!*secfeed) {
658 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
659 secfeed,
660 dvb_dmxdev_section_callback);
661 if (ret < 0) {
662 pr_err("DVB (%s): could not alloc feed\n",
663 __func__);
664 return ret;
665 }
666
667 ret = (*secfeed)->set(*secfeed, para->pid,
668 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
669 if (ret < 0) {
670 pr_err("DVB (%s): could not set feed\n",
671 __func__);
672 dvb_dmxdev_feed_restart(filter);
673 return ret;
674 }
675 } else {
676 dvb_dmxdev_feed_stop(filter);
677 }
678
679 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
680 if (ret < 0) {
681 dvb_dmxdev_feed_restart(filter);
682 filter->feed.sec->start_filtering(*secfeed);
683 dprintk("could not get filter\n");
684 return ret;
685 }
686
687 (*secfilter)->priv = filter;
688
689 memcpy(&((*secfilter)->filter_value[3]),
690 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
691 memcpy(&(*secfilter)->filter_mask[3],
692 ¶->filter.mask[1], DMX_FILTER_SIZE - 1);
693 memcpy(&(*secfilter)->filter_mode[3],
694 ¶->filter.mode[1], DMX_FILTER_SIZE - 1);
695
696 (*secfilter)->filter_value[0] = para->filter.filter[0];
697 (*secfilter)->filter_mask[0] = para->filter.mask[0];
698 (*secfilter)->filter_mode[0] = para->filter.mode[0];
699 (*secfilter)->filter_mask[1] = 0;
700 (*secfilter)->filter_mask[2] = 0;
701
702 filter->todo = 0;
703
704 ret = filter->feed.sec->start_filtering(filter->feed.sec);
705 if (ret < 0)
706 return ret;
707
708 dvb_dmxdev_filter_timer(filter);
709 break;
710 }
711 case DMXDEV_TYPE_PES:
712 list_for_each_entry(feed, &filter->feed.ts, next) {
713 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
714 if (ret < 0) {
715 dvb_dmxdev_filter_stop(filter);
716 return ret;
717 }
718 }
719 break;
720 default:
721 return -EINVAL;
722 }
723
724 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
725 return 0;
726}
727
728static int dvb_demux_open(struct inode *inode, struct file *file)
729{
730 struct dvb_device *dvbdev = file->private_data;
731 struct dmxdev *dmxdev = dvbdev->priv;
732 int i;
733 struct dmxdev_filter *dmxdevfilter;
734
735 if (!dmxdev->filter)
736 return -EINVAL;
737
738 if (mutex_lock_interruptible(&dmxdev->mutex))
739 return -ERESTARTSYS;
740
741 for (i = 0; i < dmxdev->filternum; i++)
742 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
743 break;
744
745 if (i == dmxdev->filternum) {
746 mutex_unlock(&dmxdev->mutex);
747 return -EMFILE;
748 }
749
750 dmxdevfilter = &dmxdev->filter[i];
751 mutex_init(&dmxdevfilter->mutex);
752 file->private_data = dmxdevfilter;
753
754 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
755 dmxdevfilter->type = DMXDEV_TYPE_NONE;
756 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
757 init_timer(&dmxdevfilter->timer);
758
759 dvbdev->users++;
760
761 mutex_unlock(&dmxdev->mutex);
762 return 0;
763}
764
765static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
766 struct dmxdev_filter *dmxdevfilter)
767{
768 mutex_lock(&dmxdev->mutex);
769 mutex_lock(&dmxdevfilter->mutex);
770
771 dvb_dmxdev_filter_stop(dmxdevfilter);
772 dvb_dmxdev_filter_reset(dmxdevfilter);
773
774 if (dmxdevfilter->buffer.data) {
775 void *mem = dmxdevfilter->buffer.data;
776
777 spin_lock_irq(&dmxdev->lock);
778 dmxdevfilter->buffer.data = NULL;
779 spin_unlock_irq(&dmxdev->lock);
780 vfree(mem);
781 }
782
783 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
784 wake_up(&dmxdevfilter->buffer.queue);
785 mutex_unlock(&dmxdevfilter->mutex);
786 mutex_unlock(&dmxdev->mutex);
787 return 0;
788}
789
790static inline void invert_mode(dmx_filter_t *filter)
791{
792 int i;
793
794 for (i = 0; i < DMX_FILTER_SIZE; i++)
795 filter->mode[i] ^= 0xff;
796}
797
798static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
799 struct dmxdev_filter *filter, u16 pid)
800{
801 struct dmxdev_feed *feed;
802
803 if ((filter->type != DMXDEV_TYPE_PES) ||
804 (filter->state < DMXDEV_STATE_SET))
805 return -EINVAL;
806
807
808 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
809 (!list_empty(&filter->feed.ts)))
810 return -EINVAL;
811
812 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
813 if (feed == NULL)
814 return -ENOMEM;
815
816 feed->pid = pid;
817 list_add(&feed->next, &filter->feed.ts);
818
819 if (filter->state >= DMXDEV_STATE_GO)
820 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
821
822 return 0;
823}
824
825static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
826 struct dmxdev_filter *filter, u16 pid)
827{
828 struct dmxdev_feed *feed, *tmp;
829
830 if ((filter->type != DMXDEV_TYPE_PES) ||
831 (filter->state < DMXDEV_STATE_SET))
832 return -EINVAL;
833
834 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
835 if ((feed->pid == pid) && (feed->ts != NULL)) {
836 feed->ts->stop_filtering(feed->ts);
837 filter->dev->demux->release_ts_feed(filter->dev->demux,
838 feed->ts);
839 list_del(&feed->next);
840 kfree(feed);
841 }
842 }
843
844 return 0;
845}
846
847static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
848 struct dmxdev_filter *dmxdevfilter,
849 struct dmx_sct_filter_params *params)
850{
851 dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
852 __func__, params->pid, params->flags, params->timeout);
853
854 dvb_dmxdev_filter_stop(dmxdevfilter);
855
856 dmxdevfilter->type = DMXDEV_TYPE_SEC;
857 memcpy(&dmxdevfilter->params.sec,
858 params, sizeof(struct dmx_sct_filter_params));
859 invert_mode(&dmxdevfilter->params.sec.filter);
860 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
861
862 if (params->flags & DMX_IMMEDIATE_START)
863 return dvb_dmxdev_filter_start(dmxdevfilter);
864
865 return 0;
866}
867
868static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
869 struct dmxdev_filter *dmxdevfilter,
870 struct dmx_pes_filter_params *params)
871{
872 int ret;
873
874 dvb_dmxdev_filter_stop(dmxdevfilter);
875 dvb_dmxdev_filter_reset(dmxdevfilter);
876
877 if ((unsigned int)params->pes_type > DMX_PES_OTHER)
878 return -EINVAL;
879
880 dmxdevfilter->type = DMXDEV_TYPE_PES;
881 memcpy(&dmxdevfilter->params, params,
882 sizeof(struct dmx_pes_filter_params));
883 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
884
885 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
886
887 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
888 dmxdevfilter->params.pes.pid);
889 if (ret < 0)
890 return ret;
891
892 if (params->flags & DMX_IMMEDIATE_START)
893 return dvb_dmxdev_filter_start(dmxdevfilter);
894
895 return 0;
896}
897
898static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
899 struct file *file, char __user *buf,
900 size_t count, loff_t *ppos)
901{
902 int result, hcount;
903 int done = 0;
904
905 if (dfil->todo <= 0) {
906 hcount = 3 + dfil->todo;
907 if (hcount > count)
908 hcount = count;
909 result = dvb_dmxdev_buffer_read(&dfil->buffer,
910 file->f_flags & O_NONBLOCK,
911 buf, hcount, ppos);
912 if (result < 0) {
913 dfil->todo = 0;
914 return result;
915 }
916 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
917 return -EFAULT;
918 buf += result;
919 done = result;
920 count -= result;
921 dfil->todo -= result;
922 if (dfil->todo > -3)
923 return done;
924 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
925 if (!count)
926 return done;
927 }
928 if (count > dfil->todo)
929 count = dfil->todo;
930 result = dvb_dmxdev_buffer_read(&dfil->buffer,
931 file->f_flags & O_NONBLOCK,
932 buf, count, ppos);
933 if (result < 0)
934 return result;
935 dfil->todo -= result;
936 return (result + done);
937}
938
939static ssize_t
940dvb_demux_read(struct file *file, char __user *buf, size_t count,
941 loff_t *ppos)
942{
943 struct dmxdev_filter *dmxdevfilter = file->private_data;
944 int ret;
945
946 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
947 return -ERESTARTSYS;
948
949 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
950 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
951 else
952 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
953 file->f_flags & O_NONBLOCK,
954 buf, count, ppos);
955
956 mutex_unlock(&dmxdevfilter->mutex);
957 return ret;
958}
959
960static int dvb_demux_do_ioctl(struct file *file,
961 unsigned int cmd, void *parg)
962{
963 struct dmxdev_filter *dmxdevfilter = file->private_data;
964 struct dmxdev *dmxdev = dmxdevfilter->dev;
965 unsigned long arg = (unsigned long)parg;
966 int ret = 0;
967
968 if (mutex_lock_interruptible(&dmxdev->mutex))
969 return -ERESTARTSYS;
970
971 switch (cmd) {
972 case DMX_START:
973 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
974 mutex_unlock(&dmxdev->mutex);
975 return -ERESTARTSYS;
976 }
977 if (dmxdevfilter->state < DMXDEV_STATE_SET)
978 ret = -EINVAL;
979 else
980 ret = dvb_dmxdev_filter_start(dmxdevfilter);
981 mutex_unlock(&dmxdevfilter->mutex);
982 break;
983
984 case DMX_STOP:
985 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
986 mutex_unlock(&dmxdev->mutex);
987 return -ERESTARTSYS;
988 }
989 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
990 mutex_unlock(&dmxdevfilter->mutex);
991 break;
992
993 case DMX_SET_FILTER:
994 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
995 mutex_unlock(&dmxdev->mutex);
996 return -ERESTARTSYS;
997 }
998 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
999 mutex_unlock(&dmxdevfilter->mutex);
1000 break;
1001
1002 case DMX_SET_PES_FILTER:
1003 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1004 mutex_unlock(&dmxdev->mutex);
1005 return -ERESTARTSYS;
1006 }
1007 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1008 mutex_unlock(&dmxdevfilter->mutex);
1009 break;
1010
1011 case DMX_SET_BUFFER_SIZE:
1012 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1013 mutex_unlock(&dmxdev->mutex);
1014 return -ERESTARTSYS;
1015 }
1016 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1017 mutex_unlock(&dmxdevfilter->mutex);
1018 break;
1019
1020 case DMX_GET_PES_PIDS:
1021 if (!dmxdev->demux->get_pes_pids) {
1022 ret = -EINVAL;
1023 break;
1024 }
1025 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1026 break;
1027
1028#if 0
1029
1030
1031 case DMX_GET_CAPS:
1032 if (!dmxdev->demux->get_caps) {
1033 ret = -EINVAL;
1034 break;
1035 }
1036 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
1037 break;
1038
1039 case DMX_SET_SOURCE:
1040 if (!dmxdev->demux->set_source) {
1041 ret = -EINVAL;
1042 break;
1043 }
1044 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
1045 break;
1046#endif
1047
1048 case DMX_GET_STC:
1049 if (!dmxdev->demux->get_stc) {
1050 ret = -EINVAL;
1051 break;
1052 }
1053 ret = dmxdev->demux->get_stc(dmxdev->demux,
1054 ((struct dmx_stc *)parg)->num,
1055 &((struct dmx_stc *)parg)->stc,
1056 &((struct dmx_stc *)parg)->base);
1057 break;
1058
1059 case DMX_ADD_PID:
1060 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1061 ret = -ERESTARTSYS;
1062 break;
1063 }
1064 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1065 mutex_unlock(&dmxdevfilter->mutex);
1066 break;
1067
1068 case DMX_REMOVE_PID:
1069 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1070 ret = -ERESTARTSYS;
1071 break;
1072 }
1073 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1074 mutex_unlock(&dmxdevfilter->mutex);
1075 break;
1076
1077 default:
1078 ret = -EINVAL;
1079 break;
1080 }
1081 mutex_unlock(&dmxdev->mutex);
1082 return ret;
1083}
1084
1085static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1086 unsigned long arg)
1087{
1088 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1089}
1090
1091static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
1092{
1093 struct dmxdev_filter *dmxdevfilter = file->private_data;
1094 unsigned int mask = 0;
1095
1096 if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
1097 return POLLERR;
1098
1099 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1100
1101 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1102 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1103 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1104 return 0;
1105
1106 if (dmxdevfilter->buffer.error)
1107 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1108
1109 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1110 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1111
1112 return mask;
1113}
1114
1115static int dvb_demux_release(struct inode *inode, struct file *file)
1116{
1117 struct dmxdev_filter *dmxdevfilter = file->private_data;
1118 struct dmxdev *dmxdev = dmxdevfilter->dev;
1119
1120 int ret;
1121
1122 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1123
1124 mutex_lock(&dmxdev->mutex);
1125 dmxdev->dvbdev->users--;
1126 if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
1127 mutex_unlock(&dmxdev->mutex);
1128 wake_up(&dmxdev->dvbdev->wait_queue);
1129 } else
1130 mutex_unlock(&dmxdev->mutex);
1131
1132 return ret;
1133}
1134
1135static const struct file_operations dvb_demux_fops = {
1136 .owner = THIS_MODULE,
1137 .read = dvb_demux_read,
1138 .unlocked_ioctl = dvb_demux_ioctl,
1139 .open = dvb_demux_open,
1140 .release = dvb_demux_release,
1141 .poll = dvb_demux_poll,
1142 .llseek = default_llseek,
1143};
1144
1145static const struct dvb_device dvbdev_demux = {
1146 .priv = NULL,
1147 .users = 1,
1148 .writers = 1,
1149#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1150 .name = "dvb-demux",
1151#endif
1152 .fops = &dvb_demux_fops
1153};
1154
1155static int dvb_dvr_do_ioctl(struct file *file,
1156 unsigned int cmd, void *parg)
1157{
1158 struct dvb_device *dvbdev = file->private_data;
1159 struct dmxdev *dmxdev = dvbdev->priv;
1160 unsigned long arg = (unsigned long)parg;
1161 int ret;
1162
1163 if (mutex_lock_interruptible(&dmxdev->mutex))
1164 return -ERESTARTSYS;
1165
1166 switch (cmd) {
1167 case DMX_SET_BUFFER_SIZE:
1168 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1169 break;
1170
1171 default:
1172 ret = -EINVAL;
1173 break;
1174 }
1175 mutex_unlock(&dmxdev->mutex);
1176 return ret;
1177}
1178
1179static long dvb_dvr_ioctl(struct file *file,
1180 unsigned int cmd, unsigned long arg)
1181{
1182 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1183}
1184
1185static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1186{
1187 struct dvb_device *dvbdev = file->private_data;
1188 struct dmxdev *dmxdev = dvbdev->priv;
1189 unsigned int mask = 0;
1190
1191 dprintk("%s\n", __func__);
1192
1193 if (dmxdev->exit)
1194 return POLLERR;
1195
1196 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1197
1198 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1199 if (dmxdev->dvr_buffer.error)
1200 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1201
1202 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1203 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1204 } else
1205 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1206
1207 return mask;
1208}
1209
1210static const struct file_operations dvb_dvr_fops = {
1211 .owner = THIS_MODULE,
1212 .read = dvb_dvr_read,
1213 .write = dvb_dvr_write,
1214 .unlocked_ioctl = dvb_dvr_ioctl,
1215 .open = dvb_dvr_open,
1216 .release = dvb_dvr_release,
1217 .poll = dvb_dvr_poll,
1218 .llseek = default_llseek,
1219};
1220
1221static const struct dvb_device dvbdev_dvr = {
1222 .priv = NULL,
1223 .readers = 1,
1224 .users = 1,
1225#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1226 .name = "dvb-dvr",
1227#endif
1228 .fops = &dvb_dvr_fops
1229};
1230int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1231{
1232 int i;
1233
1234 if (dmxdev->demux->open(dmxdev->demux) < 0)
1235 return -EUSERS;
1236
1237 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1238 if (!dmxdev->filter)
1239 return -ENOMEM;
1240
1241 mutex_init(&dmxdev->mutex);
1242 spin_lock_init(&dmxdev->lock);
1243 for (i = 0; i < dmxdev->filternum; i++) {
1244 dmxdev->filter[i].dev = dmxdev;
1245 dmxdev->filter[i].buffer.data = NULL;
1246 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1247 DMXDEV_STATE_FREE);
1248 }
1249
1250 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1251 DVB_DEVICE_DEMUX, dmxdev->filternum);
1252 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1253 dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
1254
1255 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1256
1257 return 0;
1258}
1259
1260EXPORT_SYMBOL(dvb_dmxdev_init);
1261
1262void dvb_dmxdev_release(struct dmxdev *dmxdev)
1263{
1264 dmxdev->exit = 1;
1265 if (dmxdev->dvbdev->users > 1) {
1266 wait_event(dmxdev->dvbdev->wait_queue,
1267 dmxdev->dvbdev->users == 1);
1268 }
1269 if (dmxdev->dvr_dvbdev->users > 1) {
1270 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1271 dmxdev->dvr_dvbdev->users == 1);
1272 }
1273
1274 dvb_unregister_device(dmxdev->dvbdev);
1275 dvb_unregister_device(dmxdev->dvr_dvbdev);
1276
1277 vfree(dmxdev->filter);
1278 dmxdev->filter = NULL;
1279 dmxdev->demux->close(dmxdev->demux);
1280}
1281
1282EXPORT_SYMBOL(dvb_dmxdev_release);
1283
