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1/*
2 * dmxdev.c - DVB demultiplexer device
3 *
4 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
5 * for convergence integrated media GmbH
6 *
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.
11 *
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.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 *
21 */
22
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 /* TODO */
207 dvbdev->users--;
208 if (dvbdev->users == 1 && dmxdev->exit == 1) {
209 mutex_unlock(&dmxdev->mutex);
210 wake_up(&dvbdev->wait_queue);
211 } else
212 mutex_unlock(&dmxdev->mutex);
213
214 return 0;
215}
216
217static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
218 size_t count, loff_t *ppos)
219{
220 struct dvb_device *dvbdev = file->private_data;
221 struct dmxdev *dmxdev = dvbdev->priv;
222 int ret;
223
224 if (!dmxdev->demux->write)
225 return -EOPNOTSUPP;
226 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
227 return -EINVAL;
228 if (mutex_lock_interruptible(&dmxdev->mutex))
229 return -ERESTARTSYS;
230
231 if (dmxdev->exit) {
232 mutex_unlock(&dmxdev->mutex);
233 return -ENODEV;
234 }
235 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
236 mutex_unlock(&dmxdev->mutex);
237 return ret;
238}
239
240static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
241 loff_t *ppos)
242{
243 struct dvb_device *dvbdev = file->private_data;
244 struct dmxdev *dmxdev = dvbdev->priv;
245
246 if (dmxdev->exit)
247 return -ENODEV;
248
249 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
250 file->f_flags & O_NONBLOCK,
251 buf, count, ppos);
252}
253
254static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
255 unsigned long size)
256{
257 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
258 void *newmem;
259 void *oldmem;
260
261 dprintk("function : %s\n", __func__);
262
263 if (buf->size == size)
264 return 0;
265 if (!size)
266 return -EINVAL;
267
268 newmem = vmalloc(size);
269 if (!newmem)
270 return -ENOMEM;
271
272 oldmem = buf->data;
273
274 spin_lock_irq(&dmxdev->lock);
275 buf->data = newmem;
276 buf->size = size;
277
278 /* reset and not flush in case the buffer shrinks */
279 dvb_ringbuffer_reset(buf);
280 spin_unlock_irq(&dmxdev->lock);
281
282 vfree(oldmem);
283
284 return 0;
285}
286
287static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
288 *dmxdevfilter, int state)
289{
290 spin_lock_irq(&dmxdevfilter->dev->lock);
291 dmxdevfilter->state = state;
292 spin_unlock_irq(&dmxdevfilter->dev->lock);
293}
294
295static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
296 unsigned long size)
297{
298 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
299 void *newmem;
300 void *oldmem;
301
302 if (buf->size == size)
303 return 0;
304 if (!size)
305 return -EINVAL;
306 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
307 return -EBUSY;
308
309 newmem = vmalloc(size);
310 if (!newmem)
311 return -ENOMEM;
312
313 oldmem = buf->data;
314
315 spin_lock_irq(&dmxdevfilter->dev->lock);
316 buf->data = newmem;
317 buf->size = size;
318
319 /* reset and not flush in case the buffer shrinks */
320 dvb_ringbuffer_reset(buf);
321 spin_unlock_irq(&dmxdevfilter->dev->lock);
322
323 vfree(oldmem);
324
325 return 0;
326}
327
328static void dvb_dmxdev_filter_timeout(unsigned long data)
329{
330 struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
331
332 dmxdevfilter->buffer.error = -ETIMEDOUT;
333 spin_lock_irq(&dmxdevfilter->dev->lock);
334 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
335 spin_unlock_irq(&dmxdevfilter->dev->lock);
336 wake_up(&dmxdevfilter->buffer.queue);
337}
338
339static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
340{
341 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
342
343 del_timer(&dmxdevfilter->timer);
344 if (para->timeout) {
345 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
346 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
347 dmxdevfilter->timer.expires =
348 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
349 add_timer(&dmxdevfilter->timer);
350 }
351}
352
353static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
354 const u8 *buffer2, size_t buffer2_len,
355 struct dmx_section_filter *filter)
356{
357 struct dmxdev_filter *dmxdevfilter = filter->priv;
358 int ret;
359
360 if (dmxdevfilter->buffer.error) {
361 wake_up(&dmxdevfilter->buffer.queue);
362 return 0;
363 }
364 spin_lock(&dmxdevfilter->dev->lock);
365 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
366 spin_unlock(&dmxdevfilter->dev->lock);
367 return 0;
368 }
369 del_timer(&dmxdevfilter->timer);
370 dprintk("dmxdev: section callback %*ph\n", 6, buffer1);
371 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
372 buffer1_len);
373 if (ret == buffer1_len) {
374 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
375 buffer2_len);
376 }
377 if (ret < 0)
378 dmxdevfilter->buffer.error = ret;
379 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
380 dmxdevfilter->state = DMXDEV_STATE_DONE;
381 spin_unlock(&dmxdevfilter->dev->lock);
382 wake_up(&dmxdevfilter->buffer.queue);
383 return 0;
384}
385
386static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
387 const u8 *buffer2, size_t buffer2_len,
388 struct dmx_ts_feed *feed)
389{
390 struct dmxdev_filter *dmxdevfilter = feed->priv;
391 struct dvb_ringbuffer *buffer;
392 int ret;
393
394 spin_lock(&dmxdevfilter->dev->lock);
395 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
396 spin_unlock(&dmxdevfilter->dev->lock);
397 return 0;
398 }
399
400 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
401 || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
402 buffer = &dmxdevfilter->buffer;
403 else
404 buffer = &dmxdevfilter->dev->dvr_buffer;
405 if (buffer->error) {
406 spin_unlock(&dmxdevfilter->dev->lock);
407 wake_up(&buffer->queue);
408 return 0;
409 }
410 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
411 if (ret == buffer1_len)
412 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
413 if (ret < 0)
414 buffer->error = ret;
415 spin_unlock(&dmxdevfilter->dev->lock);
416 wake_up(&buffer->queue);
417 return 0;
418}
419
420/* stop feed but only mark the specified filter as stopped (state set) */
421static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
422{
423 struct dmxdev_feed *feed;
424
425 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
426
427 switch (dmxdevfilter->type) {
428 case DMXDEV_TYPE_SEC:
429 del_timer(&dmxdevfilter->timer);
430 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
431 break;
432 case DMXDEV_TYPE_PES:
433 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
434 feed->ts->stop_filtering(feed->ts);
435 break;
436 default:
437 return -EINVAL;
438 }
439 return 0;
440}
441
442/* start feed associated with the specified filter */
443static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
444{
445 struct dmxdev_feed *feed;
446 int ret;
447
448 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
449
450 switch (filter->type) {
451 case DMXDEV_TYPE_SEC:
452 return filter->feed.sec->start_filtering(filter->feed.sec);
453 case DMXDEV_TYPE_PES:
454 list_for_each_entry(feed, &filter->feed.ts, next) {
455 ret = feed->ts->start_filtering(feed->ts);
456 if (ret < 0) {
457 dvb_dmxdev_feed_stop(filter);
458 return ret;
459 }
460 }
461 break;
462 default:
463 return -EINVAL;
464 }
465
466 return 0;
467}
468
469/* restart section feed if it has filters left associated with it,
470 otherwise release the feed */
471static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
472{
473 int i;
474 struct dmxdev *dmxdev = filter->dev;
475 u16 pid = filter->params.sec.pid;
476
477 for (i = 0; i < dmxdev->filternum; i++)
478 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
479 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
480 dmxdev->filter[i].params.sec.pid == pid) {
481 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
482 return 0;
483 }
484
485 filter->dev->demux->release_section_feed(dmxdev->demux,
486 filter->feed.sec);
487
488 return 0;
489}
490
491static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
492{
493 struct dmxdev_feed *feed;
494 struct dmx_demux *demux;
495
496 if (dmxdevfilter->state < DMXDEV_STATE_GO)
497 return 0;
498
499 switch (dmxdevfilter->type) {
500 case DMXDEV_TYPE_SEC:
501 if (!dmxdevfilter->feed.sec)
502 break;
503 dvb_dmxdev_feed_stop(dmxdevfilter);
504 if (dmxdevfilter->filter.sec)
505 dmxdevfilter->feed.sec->
506 release_filter(dmxdevfilter->feed.sec,
507 dmxdevfilter->filter.sec);
508 dvb_dmxdev_feed_restart(dmxdevfilter);
509 dmxdevfilter->feed.sec = NULL;
510 break;
511 case DMXDEV_TYPE_PES:
512 dvb_dmxdev_feed_stop(dmxdevfilter);
513 demux = dmxdevfilter->dev->demux;
514 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
515 demux->release_ts_feed(demux, feed->ts);
516 feed->ts = NULL;
517 }
518 break;
519 default:
520 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
521 return 0;
522 return -EINVAL;
523 }
524
525 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
526 return 0;
527}
528
529static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
530{
531 struct dmxdev_feed *feed, *tmp;
532
533 /* delete all PIDs */
534 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
535 list_del(&feed->next);
536 kfree(feed);
537 }
538
539 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
540}
541
542static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
543{
544 if (dmxdevfilter->state < DMXDEV_STATE_SET)
545 return 0;
546
547 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
548 dvb_dmxdev_delete_pids(dmxdevfilter);
549
550 dmxdevfilter->type = DMXDEV_TYPE_NONE;
551 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
552 return 0;
553}
554
555static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
556 struct dmxdev_filter *filter,
557 struct dmxdev_feed *feed)
558{
559 struct timespec timeout = { 0 };
560 struct dmx_pes_filter_params *para = &filter->params.pes;
561 dmx_output_t otype;
562 int ret;
563 int ts_type;
564 enum dmx_ts_pes ts_pes;
565 struct dmx_ts_feed *tsfeed;
566
567 feed->ts = NULL;
568 otype = para->output;
569
570 ts_pes = para->pes_type;
571
572 if (ts_pes < DMX_PES_OTHER)
573 ts_type = TS_DECODER;
574 else
575 ts_type = 0;
576
577 if (otype == DMX_OUT_TS_TAP)
578 ts_type |= TS_PACKET;
579 else if (otype == DMX_OUT_TSDEMUX_TAP)
580 ts_type |= TS_PACKET | TS_DEMUX;
581 else if (otype == DMX_OUT_TAP)
582 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
583
584 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
585 dvb_dmxdev_ts_callback);
586 if (ret < 0)
587 return ret;
588
589 tsfeed = feed->ts;
590 tsfeed->priv = filter;
591
592 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, 32768, timeout);
593 if (ret < 0) {
594 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
595 return ret;
596 }
597
598 ret = tsfeed->start_filtering(tsfeed);
599 if (ret < 0) {
600 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
601 return ret;
602 }
603
604 return 0;
605}
606
607static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
608{
609 struct dmxdev *dmxdev = filter->dev;
610 struct dmxdev_feed *feed;
611 void *mem;
612 int ret, i;
613
614 if (filter->state < DMXDEV_STATE_SET)
615 return -EINVAL;
616
617 if (filter->state >= DMXDEV_STATE_GO)
618 dvb_dmxdev_filter_stop(filter);
619
620 if (!filter->buffer.data) {
621 mem = vmalloc(filter->buffer.size);
622 if (!mem)
623 return -ENOMEM;
624 spin_lock_irq(&filter->dev->lock);
625 filter->buffer.data = mem;
626 spin_unlock_irq(&filter->dev->lock);
627 }
628
629 dvb_ringbuffer_flush(&filter->buffer);
630
631 switch (filter->type) {
632 case DMXDEV_TYPE_SEC:
633 {
634 struct dmx_sct_filter_params *para = &filter->params.sec;
635 struct dmx_section_filter **secfilter = &filter->filter.sec;
636 struct dmx_section_feed **secfeed = &filter->feed.sec;
637
638 *secfilter = NULL;
639 *secfeed = NULL;
640
641
642 /* find active filter/feed with same PID */
643 for (i = 0; i < dmxdev->filternum; i++) {
644 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
645 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
646 dmxdev->filter[i].params.sec.pid == para->pid) {
647 *secfeed = dmxdev->filter[i].feed.sec;
648 break;
649 }
650 }
651
652 /* if no feed found, try to allocate new one */
653 if (!*secfeed) {
654 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
655 secfeed,
656 dvb_dmxdev_section_callback);
657 if (ret < 0) {
658 printk("DVB (%s): could not alloc feed\n",
659 __func__);
660 return ret;
661 }
662
663 ret = (*secfeed)->set(*secfeed, para->pid, 32768,
664 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
665 if (ret < 0) {
666 printk("DVB (%s): could not set feed\n",
667 __func__);
668 dvb_dmxdev_feed_restart(filter);
669 return ret;
670 }
671 } else {
672 dvb_dmxdev_feed_stop(filter);
673 }
674
675 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
676 if (ret < 0) {
677 dvb_dmxdev_feed_restart(filter);
678 filter->feed.sec->start_filtering(*secfeed);
679 dprintk("could not get filter\n");
680 return ret;
681 }
682
683 (*secfilter)->priv = filter;
684
685 memcpy(&((*secfilter)->filter_value[3]),
686 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
687 memcpy(&(*secfilter)->filter_mask[3],
688 ¶->filter.mask[1], DMX_FILTER_SIZE - 1);
689 memcpy(&(*secfilter)->filter_mode[3],
690 ¶->filter.mode[1], DMX_FILTER_SIZE - 1);
691
692 (*secfilter)->filter_value[0] = para->filter.filter[0];
693 (*secfilter)->filter_mask[0] = para->filter.mask[0];
694 (*secfilter)->filter_mode[0] = para->filter.mode[0];
695 (*secfilter)->filter_mask[1] = 0;
696 (*secfilter)->filter_mask[2] = 0;
697
698 filter->todo = 0;
699
700 ret = filter->feed.sec->start_filtering(filter->feed.sec);
701 if (ret < 0)
702 return ret;
703
704 dvb_dmxdev_filter_timer(filter);
705 break;
706 }
707 case DMXDEV_TYPE_PES:
708 list_for_each_entry(feed, &filter->feed.ts, next) {
709 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
710 if (ret < 0) {
711 dvb_dmxdev_filter_stop(filter);
712 return ret;
713 }
714 }
715 break;
716 default:
717 return -EINVAL;
718 }
719
720 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
721 return 0;
722}
723
724static int dvb_demux_open(struct inode *inode, struct file *file)
725{
726 struct dvb_device *dvbdev = file->private_data;
727 struct dmxdev *dmxdev = dvbdev->priv;
728 int i;
729 struct dmxdev_filter *dmxdevfilter;
730
731 if (!dmxdev->filter)
732 return -EINVAL;
733
734 if (mutex_lock_interruptible(&dmxdev->mutex))
735 return -ERESTARTSYS;
736
737 for (i = 0; i < dmxdev->filternum; i++)
738 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
739 break;
740
741 if (i == dmxdev->filternum) {
742 mutex_unlock(&dmxdev->mutex);
743 return -EMFILE;
744 }
745
746 dmxdevfilter = &dmxdev->filter[i];
747 mutex_init(&dmxdevfilter->mutex);
748 file->private_data = dmxdevfilter;
749
750 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
751 dmxdevfilter->type = DMXDEV_TYPE_NONE;
752 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
753 init_timer(&dmxdevfilter->timer);
754
755 dvbdev->users++;
756
757 mutex_unlock(&dmxdev->mutex);
758 return 0;
759}
760
761static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
762 struct dmxdev_filter *dmxdevfilter)
763{
764 mutex_lock(&dmxdev->mutex);
765 mutex_lock(&dmxdevfilter->mutex);
766
767 dvb_dmxdev_filter_stop(dmxdevfilter);
768 dvb_dmxdev_filter_reset(dmxdevfilter);
769
770 if (dmxdevfilter->buffer.data) {
771 void *mem = dmxdevfilter->buffer.data;
772
773 spin_lock_irq(&dmxdev->lock);
774 dmxdevfilter->buffer.data = NULL;
775 spin_unlock_irq(&dmxdev->lock);
776 vfree(mem);
777 }
778
779 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
780 wake_up(&dmxdevfilter->buffer.queue);
781 mutex_unlock(&dmxdevfilter->mutex);
782 mutex_unlock(&dmxdev->mutex);
783 return 0;
784}
785
786static inline void invert_mode(dmx_filter_t *filter)
787{
788 int i;
789
790 for (i = 0; i < DMX_FILTER_SIZE; i++)
791 filter->mode[i] ^= 0xff;
792}
793
794static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
795 struct dmxdev_filter *filter, u16 pid)
796{
797 struct dmxdev_feed *feed;
798
799 if ((filter->type != DMXDEV_TYPE_PES) ||
800 (filter->state < DMXDEV_STATE_SET))
801 return -EINVAL;
802
803 /* only TS packet filters may have multiple PIDs */
804 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
805 (!list_empty(&filter->feed.ts)))
806 return -EINVAL;
807
808 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
809 if (feed == NULL)
810 return -ENOMEM;
811
812 feed->pid = pid;
813 list_add(&feed->next, &filter->feed.ts);
814
815 if (filter->state >= DMXDEV_STATE_GO)
816 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
817
818 return 0;
819}
820
821static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
822 struct dmxdev_filter *filter, u16 pid)
823{
824 struct dmxdev_feed *feed, *tmp;
825
826 if ((filter->type != DMXDEV_TYPE_PES) ||
827 (filter->state < DMXDEV_STATE_SET))
828 return -EINVAL;
829
830 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
831 if ((feed->pid == pid) && (feed->ts != NULL)) {
832 feed->ts->stop_filtering(feed->ts);
833 filter->dev->demux->release_ts_feed(filter->dev->demux,
834 feed->ts);
835 list_del(&feed->next);
836 kfree(feed);
837 }
838 }
839
840 return 0;
841}
842
843static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
844 struct dmxdev_filter *dmxdevfilter,
845 struct dmx_sct_filter_params *params)
846{
847 dprintk("function : %s, PID=0x%04x, flags=%02x, timeout=%d\n",
848 __func__, params->pid, params->flags, params->timeout);
849
850 dvb_dmxdev_filter_stop(dmxdevfilter);
851
852 dmxdevfilter->type = DMXDEV_TYPE_SEC;
853 memcpy(&dmxdevfilter->params.sec,
854 params, sizeof(struct dmx_sct_filter_params));
855 invert_mode(&dmxdevfilter->params.sec.filter);
856 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
857
858 if (params->flags & DMX_IMMEDIATE_START)
859 return dvb_dmxdev_filter_start(dmxdevfilter);
860
861 return 0;
862}
863
864static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
865 struct dmxdev_filter *dmxdevfilter,
866 struct dmx_pes_filter_params *params)
867{
868 int ret;
869
870 dvb_dmxdev_filter_stop(dmxdevfilter);
871 dvb_dmxdev_filter_reset(dmxdevfilter);
872
873 if ((unsigned)params->pes_type > DMX_PES_OTHER)
874 return -EINVAL;
875
876 dmxdevfilter->type = DMXDEV_TYPE_PES;
877 memcpy(&dmxdevfilter->params, params,
878 sizeof(struct dmx_pes_filter_params));
879 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
880
881 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
882
883 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
884 dmxdevfilter->params.pes.pid);
885 if (ret < 0)
886 return ret;
887
888 if (params->flags & DMX_IMMEDIATE_START)
889 return dvb_dmxdev_filter_start(dmxdevfilter);
890
891 return 0;
892}
893
894static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
895 struct file *file, char __user *buf,
896 size_t count, loff_t *ppos)
897{
898 int result, hcount;
899 int done = 0;
900
901 if (dfil->todo <= 0) {
902 hcount = 3 + dfil->todo;
903 if (hcount > count)
904 hcount = count;
905 result = dvb_dmxdev_buffer_read(&dfil->buffer,
906 file->f_flags & O_NONBLOCK,
907 buf, hcount, ppos);
908 if (result < 0) {
909 dfil->todo = 0;
910 return result;
911 }
912 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
913 return -EFAULT;
914 buf += result;
915 done = result;
916 count -= result;
917 dfil->todo -= result;
918 if (dfil->todo > -3)
919 return done;
920 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
921 if (!count)
922 return done;
923 }
924 if (count > dfil->todo)
925 count = dfil->todo;
926 result = dvb_dmxdev_buffer_read(&dfil->buffer,
927 file->f_flags & O_NONBLOCK,
928 buf, count, ppos);
929 if (result < 0)
930 return result;
931 dfil->todo -= result;
932 return (result + done);
933}
934
935static ssize_t
936dvb_demux_read(struct file *file, char __user *buf, size_t count,
937 loff_t *ppos)
938{
939 struct dmxdev_filter *dmxdevfilter = file->private_data;
940 int ret;
941
942 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
943 return -ERESTARTSYS;
944
945 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
946 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
947 else
948 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
949 file->f_flags & O_NONBLOCK,
950 buf, count, ppos);
951
952 mutex_unlock(&dmxdevfilter->mutex);
953 return ret;
954}
955
956static int dvb_demux_do_ioctl(struct file *file,
957 unsigned int cmd, void *parg)
958{
959 struct dmxdev_filter *dmxdevfilter = file->private_data;
960 struct dmxdev *dmxdev = dmxdevfilter->dev;
961 unsigned long arg = (unsigned long)parg;
962 int ret = 0;
963
964 if (mutex_lock_interruptible(&dmxdev->mutex))
965 return -ERESTARTSYS;
966
967 switch (cmd) {
968 case DMX_START:
969 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
970 mutex_unlock(&dmxdev->mutex);
971 return -ERESTARTSYS;
972 }
973 if (dmxdevfilter->state < DMXDEV_STATE_SET)
974 ret = -EINVAL;
975 else
976 ret = dvb_dmxdev_filter_start(dmxdevfilter);
977 mutex_unlock(&dmxdevfilter->mutex);
978 break;
979
980 case DMX_STOP:
981 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
982 mutex_unlock(&dmxdev->mutex);
983 return -ERESTARTSYS;
984 }
985 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
986 mutex_unlock(&dmxdevfilter->mutex);
987 break;
988
989 case DMX_SET_FILTER:
990 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
991 mutex_unlock(&dmxdev->mutex);
992 return -ERESTARTSYS;
993 }
994 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
995 mutex_unlock(&dmxdevfilter->mutex);
996 break;
997
998 case DMX_SET_PES_FILTER:
999 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1000 mutex_unlock(&dmxdev->mutex);
1001 return -ERESTARTSYS;
1002 }
1003 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1004 mutex_unlock(&dmxdevfilter->mutex);
1005 break;
1006
1007 case DMX_SET_BUFFER_SIZE:
1008 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1009 mutex_unlock(&dmxdev->mutex);
1010 return -ERESTARTSYS;
1011 }
1012 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1013 mutex_unlock(&dmxdevfilter->mutex);
1014 break;
1015
1016 case DMX_GET_PES_PIDS:
1017 if (!dmxdev->demux->get_pes_pids) {
1018 ret = -EINVAL;
1019 break;
1020 }
1021 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1022 break;
1023
1024#if 0
1025 /* Not used upstream and never documented */
1026
1027 case DMX_GET_CAPS:
1028 if (!dmxdev->demux->get_caps) {
1029 ret = -EINVAL;
1030 break;
1031 }
1032 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
1033 break;
1034
1035 case DMX_SET_SOURCE:
1036 if (!dmxdev->demux->set_source) {
1037 ret = -EINVAL;
1038 break;
1039 }
1040 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
1041 break;
1042#endif
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) || dmxdevfilter->dev->exit)
1093 return POLLERR;
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 mutex_unlock(&dmxdev->mutex);
1124 wake_up(&dmxdev->dvbdev->wait_queue);
1125 } else
1126 mutex_unlock(&dmxdev->mutex);
1127
1128 return ret;
1129}
1130
1131static const struct file_operations dvb_demux_fops = {
1132 .owner = THIS_MODULE,
1133 .read = dvb_demux_read,
1134 .unlocked_ioctl = dvb_demux_ioctl,
1135 .open = dvb_demux_open,
1136 .release = dvb_demux_release,
1137 .poll = dvb_demux_poll,
1138 .llseek = default_llseek,
1139};
1140
1141static const struct dvb_device dvbdev_demux = {
1142 .priv = NULL,
1143 .users = 1,
1144 .writers = 1,
1145#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1146 .name = "dvb-demux",
1147#endif
1148 .fops = &dvb_demux_fops
1149};
1150
1151static int dvb_dvr_do_ioctl(struct file *file,
1152 unsigned int cmd, void *parg)
1153{
1154 struct dvb_device *dvbdev = file->private_data;
1155 struct dmxdev *dmxdev = dvbdev->priv;
1156 unsigned long arg = (unsigned long)parg;
1157 int ret;
1158
1159 if (mutex_lock_interruptible(&dmxdev->mutex))
1160 return -ERESTARTSYS;
1161
1162 switch (cmd) {
1163 case DMX_SET_BUFFER_SIZE:
1164 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1165 break;
1166
1167 default:
1168 ret = -EINVAL;
1169 break;
1170 }
1171 mutex_unlock(&dmxdev->mutex);
1172 return ret;
1173}
1174
1175static long dvb_dvr_ioctl(struct file *file,
1176 unsigned int cmd, unsigned long arg)
1177{
1178 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1179}
1180
1181static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1182{
1183 struct dvb_device *dvbdev = file->private_data;
1184 struct dmxdev *dmxdev = dvbdev->priv;
1185 unsigned int mask = 0;
1186
1187 dprintk("function : %s\n", __func__);
1188
1189 if (dmxdev->exit)
1190 return POLLERR;
1191
1192 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1193
1194 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1195 if (dmxdev->dvr_buffer.error)
1196 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1197
1198 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1199 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1200 } else
1201 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1202
1203 return mask;
1204}
1205
1206static const struct file_operations dvb_dvr_fops = {
1207 .owner = THIS_MODULE,
1208 .read = dvb_dvr_read,
1209 .write = dvb_dvr_write,
1210 .unlocked_ioctl = dvb_dvr_ioctl,
1211 .open = dvb_dvr_open,
1212 .release = dvb_dvr_release,
1213 .poll = dvb_dvr_poll,
1214 .llseek = default_llseek,
1215};
1216
1217static const struct dvb_device dvbdev_dvr = {
1218 .priv = NULL,
1219 .readers = 1,
1220 .users = 1,
1221#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1222 .name = "dvb-dvr",
1223#endif
1224 .fops = &dvb_dvr_fops
1225};
1226int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1227{
1228 int i;
1229
1230 if (dmxdev->demux->open(dmxdev->demux) < 0)
1231 return -EUSERS;
1232
1233 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1234 if (!dmxdev->filter)
1235 return -ENOMEM;
1236
1237 mutex_init(&dmxdev->mutex);
1238 spin_lock_init(&dmxdev->lock);
1239 for (i = 0; i < dmxdev->filternum; i++) {
1240 dmxdev->filter[i].dev = dmxdev;
1241 dmxdev->filter[i].buffer.data = NULL;
1242 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1243 DMXDEV_STATE_FREE);
1244 }
1245
1246 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1247 DVB_DEVICE_DEMUX, dmxdev->filternum);
1248 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1249 dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
1250
1251 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1252
1253 return 0;
1254}
1255
1256EXPORT_SYMBOL(dvb_dmxdev_init);
1257
1258void dvb_dmxdev_release(struct dmxdev *dmxdev)
1259{
1260 dmxdev->exit=1;
1261 if (dmxdev->dvbdev->users > 1) {
1262 wait_event(dmxdev->dvbdev->wait_queue,
1263 dmxdev->dvbdev->users==1);
1264 }
1265 if (dmxdev->dvr_dvbdev->users > 1) {
1266 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1267 dmxdev->dvr_dvbdev->users==1);
1268 }
1269
1270 dvb_unregister_device(dmxdev->dvbdev);
1271 dvb_unregister_device(dmxdev->dvr_dvbdev);
1272
1273 vfree(dmxdev->filter);
1274 dmxdev->filter = NULL;
1275 dmxdev->demux->close(dmxdev->demux);
1276}
1277
1278EXPORT_SYMBOL(dvb_dmxdev_release);