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23#include <linux/sched.h>
24#include <linux/spinlock.h>
25#include <linux/slab.h>
26#include <linux/vmalloc.h>
27#include <linux/module.h>
28#include <linux/poll.h>
29#include <linux/ioctl.h>
30#include <linux/wait.h>
31#include <asm/uaccess.h>
32#include "dmxdev.h"
33
34static int debug;
35
36module_param(debug, int, 0644);
37MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
38
39#define dprintk if (debug) printk
40
41static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
42 const u8 *src, size_t len)
43{
44 ssize_t free;
45
46 if (!len)
47 return 0;
48 if (!buf->data)
49 return 0;
50
51 free = dvb_ringbuffer_free(buf);
52 if (len > free) {
53 dprintk("dmxdev: buffer overflow\n");
54 return -EOVERFLOW;
55 }
56
57 return dvb_ringbuffer_write(buf, src, len);
58}
59
60static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
61 int non_blocking, char __user *buf,
62 size_t count, loff_t *ppos)
63{
64 size_t todo;
65 ssize_t avail;
66 ssize_t ret = 0;
67
68 if (!src->data)
69 return 0;
70
71 if (src->error) {
72 ret = src->error;
73 dvb_ringbuffer_flush(src);
74 return ret;
75 }
76
77 for (todo = count; todo > 0; todo -= ret) {
78 if (non_blocking && dvb_ringbuffer_empty(src)) {
79 ret = -EWOULDBLOCK;
80 break;
81 }
82
83 ret = wait_event_interruptible(src->queue,
84 !dvb_ringbuffer_empty(src) ||
85 (src->error != 0));
86 if (ret < 0)
87 break;
88
89 if (src->error) {
90 ret = src->error;
91 dvb_ringbuffer_flush(src);
92 break;
93 }
94
95 avail = dvb_ringbuffer_avail(src);
96 if (avail > todo)
97 avail = todo;
98
99 ret = dvb_ringbuffer_read_user(src, buf, avail);
100 if (ret < 0)
101 break;
102
103 buf += ret;
104 }
105
106 return (count - todo) ? (count - todo) : ret;
107}
108
109static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
110{
111 struct list_head *head, *pos;
112
113 head = demux->get_frontends(demux);
114 if (!head)
115 return NULL;
116 list_for_each(pos, head)
117 if (DMX_FE_ENTRY(pos)->source == type)
118 return DMX_FE_ENTRY(pos);
119
120 return NULL;
121}
122
123static int dvb_dvr_open(struct inode *inode, struct file *file)
124{
125 struct dvb_device *dvbdev = file->private_data;
126 struct dmxdev *dmxdev = dvbdev->priv;
127 struct dmx_frontend *front;
128
129 dprintk("function : %s\n", __func__);
130
131 if (mutex_lock_interruptible(&dmxdev->mutex))
132 return -ERESTARTSYS;
133
134 if (dmxdev->exit) {
135 mutex_unlock(&dmxdev->mutex);
136 return -ENODEV;
137 }
138
139 if ((file->f_flags & O_ACCMODE) == O_RDWR) {
140 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
141 mutex_unlock(&dmxdev->mutex);
142 return -EOPNOTSUPP;
143 }
144 }
145
146 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
147 void *mem;
148 if (!dvbdev->readers) {
149 mutex_unlock(&dmxdev->mutex);
150 return -EBUSY;
151 }
152 mem = vmalloc(DVR_BUFFER_SIZE);
153 if (!mem) {
154 mutex_unlock(&dmxdev->mutex);
155 return -ENOMEM;
156 }
157 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
158 dvbdev->readers--;
159 }
160
161 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
162 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
163
164 if (!dmxdev->demux->write) {
165 mutex_unlock(&dmxdev->mutex);
166 return -EOPNOTSUPP;
167 }
168
169 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
170
171 if (!front) {
172 mutex_unlock(&dmxdev->mutex);
173 return -EINVAL;
174 }
175 dmxdev->demux->disconnect_frontend(dmxdev->demux);
176 dmxdev->demux->connect_frontend(dmxdev->demux, front);
177 }
178 dvbdev->users++;
179 mutex_unlock(&dmxdev->mutex);
180 return 0;
181}
182
183static int dvb_dvr_release(struct inode *inode, struct file *file)
184{
185 struct dvb_device *dvbdev = file->private_data;
186 struct dmxdev *dmxdev = dvbdev->priv;
187
188 mutex_lock(&dmxdev->mutex);
189
190 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
191 dmxdev->demux->disconnect_frontend(dmxdev->demux);
192 dmxdev->demux->connect_frontend(dmxdev->demux,
193 dmxdev->dvr_orig_fe);
194 }
195 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
196 dvbdev->readers++;
197 if (dmxdev->dvr_buffer.data) {
198 void *mem = dmxdev->dvr_buffer.data;
199 mb();
200 spin_lock_irq(&dmxdev->lock);
201 dmxdev->dvr_buffer.data = NULL;
202 spin_unlock_irq(&dmxdev->lock);
203 vfree(mem);
204 }
205 }
206
207 dvbdev->users--;
208 if (dvbdev->users == 1 && dmxdev->exit == 1) {
209 fops_put(file->f_op);
210 file->f_op = NULL;
211 mutex_unlock(&dmxdev->mutex);
212 wake_up(&dvbdev->wait_queue);
213 } else
214 mutex_unlock(&dmxdev->mutex);
215
216 return 0;
217}
218
219static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
220 size_t count, loff_t *ppos)
221{
222 struct dvb_device *dvbdev = file->private_data;
223 struct dmxdev *dmxdev = dvbdev->priv;
224 int ret;
225
226 if (!dmxdev->demux->write)
227 return -EOPNOTSUPP;
228 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
229 return -EINVAL;
230 if (mutex_lock_interruptible(&dmxdev->mutex))
231 return -ERESTARTSYS;
232
233 if (dmxdev->exit) {
234 mutex_unlock(&dmxdev->mutex);
235 return -ENODEV;
236 }
237 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
238 mutex_unlock(&dmxdev->mutex);
239 return ret;
240}
241
242static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
243 loff_t *ppos)
244{
245 struct dvb_device *dvbdev = file->private_data;
246 struct dmxdev *dmxdev = dvbdev->priv;
247
248 if (dmxdev->exit)
249 return -ENODEV;
250
251 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
252 file->f_flags & O_NONBLOCK,
253 buf, count, ppos);
254}
255
256static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
257 unsigned long size)
258{
259 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
260 void *newmem;
261 void *oldmem;
262
263 dprintk("function : %s\n", __func__);
264
265 if (buf->size == size)
266 return 0;
267 if (!size)
268 return -EINVAL;
269
270 newmem = vmalloc(size);
271 if (!newmem)
272 return -ENOMEM;
273
274 oldmem = buf->data;
275
276 spin_lock_irq(&dmxdev->lock);
277 buf->data = newmem;
278 buf->size = size;
279
280
281 dvb_ringbuffer_reset(buf);
282 spin_unlock_irq(&dmxdev->lock);
283
284 vfree(oldmem);
285
286 return 0;
287}
288
289static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
290 *dmxdevfilter, int state)
291{
292 spin_lock_irq(&dmxdevfilter->dev->lock);
293 dmxdevfilter->state = state;
294 spin_unlock_irq(&dmxdevfilter->dev->lock);
295}
296
297static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
298 unsigned long size)
299{
300 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
301 void *newmem;
302 void *oldmem;
303
304 if (buf->size == size)
305 return 0;
306 if (!size)
307 return -EINVAL;
308 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
309 return -EBUSY;
310
311 newmem = vmalloc(size);
312 if (!newmem)
313 return -ENOMEM;
314
315 oldmem = buf->data;
316
317 spin_lock_irq(&dmxdevfilter->dev->lock);
318 buf->data = newmem;
319 buf->size = size;
320
321
322 dvb_ringbuffer_reset(buf);
323 spin_unlock_irq(&dmxdevfilter->dev->lock);
324
325 vfree(oldmem);
326
327 return 0;
328}
329
330static void dvb_dmxdev_filter_timeout(unsigned long data)
331{
332 struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
333
334 dmxdevfilter->buffer.error = -ETIMEDOUT;
335 spin_lock_irq(&dmxdevfilter->dev->lock);
336 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
337 spin_unlock_irq(&dmxdevfilter->dev->lock);
338 wake_up(&dmxdevfilter->buffer.queue);
339}
340
341static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
342{
343 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
344
345 del_timer(&dmxdevfilter->timer);
346 if (para->timeout) {
347 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
348 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
349 dmxdevfilter->timer.expires =
350 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
351 add_timer(&dmxdevfilter->timer);
352 }
353}
354
355static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
356 const u8 *buffer2, size_t buffer2_len,
357 struct dmx_section_filter *filter,
358 enum dmx_success success)
359{
360 struct dmxdev_filter *dmxdevfilter = filter->priv;
361 int ret;
362
363 if (dmxdevfilter->buffer.error) {
364 wake_up(&dmxdevfilter->buffer.queue);
365 return 0;
366 }
367 spin_lock(&dmxdevfilter->dev->lock);
368 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
369 spin_unlock(&dmxdevfilter->dev->lock);
370 return 0;
371 }
372 del_timer(&dmxdevfilter->timer);
373 dprintk("dmxdev: section callback %*ph\n", 6, buffer1);
374 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
375 buffer1_len);
376 if (ret == buffer1_len) {
377 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
378 buffer2_len);
379 }
380 if (ret < 0)
381 dmxdevfilter->buffer.error = ret;
382 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
383 dmxdevfilter->state = DMXDEV_STATE_DONE;
384 spin_unlock(&dmxdevfilter->dev->lock);
385 wake_up(&dmxdevfilter->buffer.queue);
386 return 0;
387}
388
389static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
390 const u8 *buffer2, size_t buffer2_len,
391 struct dmx_ts_feed *feed,
392 enum dmx_success success)
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 struct timespec 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, 32768, 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 printk("DVB (%s): could not alloc feed\n",
663 __func__);
664 return ret;
665 }
666
667 ret = (*secfeed)->set(*secfeed, para->pid, 32768,
668 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
669 if (ret < 0) {
670 printk("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("function : %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)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 case DMX_GET_CAPS:
1029 if (!dmxdev->demux->get_caps) {
1030 ret = -EINVAL;
1031 break;
1032 }
1033 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
1034 break;
1035
1036 case DMX_SET_SOURCE:
1037 if (!dmxdev->demux->set_source) {
1038 ret = -EINVAL;
1039 break;
1040 }
1041 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
1042 break;
1043
1044 case DMX_GET_STC:
1045 if (!dmxdev->demux->get_stc) {
1046 ret = -EINVAL;
1047 break;
1048 }
1049 ret = dmxdev->demux->get_stc(dmxdev->demux,
1050 ((struct dmx_stc *)parg)->num,
1051 &((struct dmx_stc *)parg)->stc,
1052 &((struct dmx_stc *)parg)->base);
1053 break;
1054
1055 case DMX_ADD_PID:
1056 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1057 ret = -ERESTARTSYS;
1058 break;
1059 }
1060 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1061 mutex_unlock(&dmxdevfilter->mutex);
1062 break;
1063
1064 case DMX_REMOVE_PID:
1065 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1066 ret = -ERESTARTSYS;
1067 break;
1068 }
1069 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1070 mutex_unlock(&dmxdevfilter->mutex);
1071 break;
1072
1073 default:
1074 ret = -EINVAL;
1075 break;
1076 }
1077 mutex_unlock(&dmxdev->mutex);
1078 return ret;
1079}
1080
1081static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1082 unsigned long arg)
1083{
1084 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1085}
1086
1087static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
1088{
1089 struct dmxdev_filter *dmxdevfilter = file->private_data;
1090 unsigned int mask = 0;
1091
1092 if (!dmxdevfilter)
1093 return -EINVAL;
1094
1095 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1096
1097 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1098 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1099 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1100 return 0;
1101
1102 if (dmxdevfilter->buffer.error)
1103 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1104
1105 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1106 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1107
1108 return mask;
1109}
1110
1111static int dvb_demux_release(struct inode *inode, struct file *file)
1112{
1113 struct dmxdev_filter *dmxdevfilter = file->private_data;
1114 struct dmxdev *dmxdev = dmxdevfilter->dev;
1115
1116 int ret;
1117
1118 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1119
1120 mutex_lock(&dmxdev->mutex);
1121 dmxdev->dvbdev->users--;
1122 if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
1123 fops_put(file->f_op);
1124 file->f_op = NULL;
1125 mutex_unlock(&dmxdev->mutex);
1126 wake_up(&dmxdev->dvbdev->wait_queue);
1127 } else
1128 mutex_unlock(&dmxdev->mutex);
1129
1130 return ret;
1131}
1132
1133static const struct file_operations dvb_demux_fops = {
1134 .owner = THIS_MODULE,
1135 .read = dvb_demux_read,
1136 .unlocked_ioctl = dvb_demux_ioctl,
1137 .open = dvb_demux_open,
1138 .release = dvb_demux_release,
1139 .poll = dvb_demux_poll,
1140 .llseek = default_llseek,
1141};
1142
1143static struct dvb_device dvbdev_demux = {
1144 .priv = NULL,
1145 .users = 1,
1146 .writers = 1,
1147 .fops = &dvb_demux_fops
1148};
1149
1150static int dvb_dvr_do_ioctl(struct file *file,
1151 unsigned int cmd, void *parg)
1152{
1153 struct dvb_device *dvbdev = file->private_data;
1154 struct dmxdev *dmxdev = dvbdev->priv;
1155 unsigned long arg = (unsigned long)parg;
1156 int ret;
1157
1158 if (mutex_lock_interruptible(&dmxdev->mutex))
1159 return -ERESTARTSYS;
1160
1161 switch (cmd) {
1162 case DMX_SET_BUFFER_SIZE:
1163 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1164 break;
1165
1166 default:
1167 ret = -EINVAL;
1168 break;
1169 }
1170 mutex_unlock(&dmxdev->mutex);
1171 return ret;
1172}
1173
1174static long dvb_dvr_ioctl(struct file *file,
1175 unsigned int cmd, unsigned long arg)
1176{
1177 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1178}
1179
1180static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1181{
1182 struct dvb_device *dvbdev = file->private_data;
1183 struct dmxdev *dmxdev = dvbdev->priv;
1184 unsigned int mask = 0;
1185
1186 dprintk("function : %s\n", __func__);
1187
1188 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1189
1190 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1191 if (dmxdev->dvr_buffer.error)
1192 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1193
1194 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1195 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1196 } else
1197 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1198
1199 return mask;
1200}
1201
1202static const struct file_operations dvb_dvr_fops = {
1203 .owner = THIS_MODULE,
1204 .read = dvb_dvr_read,
1205 .write = dvb_dvr_write,
1206 .unlocked_ioctl = dvb_dvr_ioctl,
1207 .open = dvb_dvr_open,
1208 .release = dvb_dvr_release,
1209 .poll = dvb_dvr_poll,
1210 .llseek = default_llseek,
1211};
1212
1213static struct dvb_device dvbdev_dvr = {
1214 .priv = NULL,
1215 .readers = 1,
1216 .users = 1,
1217 .fops = &dvb_dvr_fops
1218};
1219
1220int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1221{
1222 int i;
1223
1224 if (dmxdev->demux->open(dmxdev->demux) < 0)
1225 return -EUSERS;
1226
1227 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1228 if (!dmxdev->filter)
1229 return -ENOMEM;
1230
1231 mutex_init(&dmxdev->mutex);
1232 spin_lock_init(&dmxdev->lock);
1233 for (i = 0; i < dmxdev->filternum; i++) {
1234 dmxdev->filter[i].dev = dmxdev;
1235 dmxdev->filter[i].buffer.data = NULL;
1236 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1237 DMXDEV_STATE_FREE);
1238 }
1239
1240 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1241 DVB_DEVICE_DEMUX);
1242 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1243 dmxdev, DVB_DEVICE_DVR);
1244
1245 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1246
1247 return 0;
1248}
1249
1250EXPORT_SYMBOL(dvb_dmxdev_init);
1251
1252void dvb_dmxdev_release(struct dmxdev *dmxdev)
1253{
1254 dmxdev->exit=1;
1255 if (dmxdev->dvbdev->users > 1) {
1256 wait_event(dmxdev->dvbdev->wait_queue,
1257 dmxdev->dvbdev->users==1);
1258 }
1259 if (dmxdev->dvr_dvbdev->users > 1) {
1260 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1261 dmxdev->dvr_dvbdev->users==1);
1262 }
1263
1264 dvb_unregister_device(dmxdev->dvbdev);
1265 dvb_unregister_device(dmxdev->dvr_dvbdev);
1266
1267 vfree(dmxdev->filter);
1268 dmxdev->filter = NULL;
1269 dmxdev->demux->close(dmxdev->demux);
1270}
1271
1272EXPORT_SYMBOL(dvb_dmxdev_release);
1273
