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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 enum dmx_success success)
357{
358 struct dmxdev_filter *dmxdevfilter = filter->priv;
359 int ret;
360
361 if (dmxdevfilter->buffer.error) {
362 wake_up(&dmxdevfilter->buffer.queue);
363 return 0;
364 }
365 spin_lock(&dmxdevfilter->dev->lock);
366 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
367 spin_unlock(&dmxdevfilter->dev->lock);
368 return 0;
369 }
370 del_timer(&dmxdevfilter->timer);
371 dprintk("dmxdev: section callback %*ph\n", 6, buffer1);
372 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
373 buffer1_len);
374 if (ret == buffer1_len) {
375 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
376 buffer2_len);
377 }
378 if (ret < 0)
379 dmxdevfilter->buffer.error = ret;
380 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
381 dmxdevfilter->state = DMXDEV_STATE_DONE;
382 spin_unlock(&dmxdevfilter->dev->lock);
383 wake_up(&dmxdevfilter->buffer.queue);
384 return 0;
385}
386
387static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
388 const u8 *buffer2, size_t buffer2_len,
389 struct dmx_ts_feed *feed,
390 enum dmx_success success)
391{
392 struct dmxdev_filter *dmxdevfilter = feed->priv;
393 struct dvb_ringbuffer *buffer;
394 int ret;
395
396 spin_lock(&dmxdevfilter->dev->lock);
397 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
398 spin_unlock(&dmxdevfilter->dev->lock);
399 return 0;
400 }
401
402 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
403 || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
404 buffer = &dmxdevfilter->buffer;
405 else
406 buffer = &dmxdevfilter->dev->dvr_buffer;
407 if (buffer->error) {
408 spin_unlock(&dmxdevfilter->dev->lock);
409 wake_up(&buffer->queue);
410 return 0;
411 }
412 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
413 if (ret == buffer1_len)
414 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
415 if (ret < 0)
416 buffer->error = ret;
417 spin_unlock(&dmxdevfilter->dev->lock);
418 wake_up(&buffer->queue);
419 return 0;
420}
421
422/* stop feed but only mark the specified filter as stopped (state set) */
423static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
424{
425 struct dmxdev_feed *feed;
426
427 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
428
429 switch (dmxdevfilter->type) {
430 case DMXDEV_TYPE_SEC:
431 del_timer(&dmxdevfilter->timer);
432 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
433 break;
434 case DMXDEV_TYPE_PES:
435 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
436 feed->ts->stop_filtering(feed->ts);
437 break;
438 default:
439 return -EINVAL;
440 }
441 return 0;
442}
443
444/* start feed associated with the specified filter */
445static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
446{
447 struct dmxdev_feed *feed;
448 int ret;
449
450 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
451
452 switch (filter->type) {
453 case DMXDEV_TYPE_SEC:
454 return filter->feed.sec->start_filtering(filter->feed.sec);
455 case DMXDEV_TYPE_PES:
456 list_for_each_entry(feed, &filter->feed.ts, next) {
457 ret = feed->ts->start_filtering(feed->ts);
458 if (ret < 0) {
459 dvb_dmxdev_feed_stop(filter);
460 return ret;
461 }
462 }
463 break;
464 default:
465 return -EINVAL;
466 }
467
468 return 0;
469}
470
471/* restart section feed if it has filters left associated with it,
472 otherwise release the feed */
473static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
474{
475 int i;
476 struct dmxdev *dmxdev = filter->dev;
477 u16 pid = filter->params.sec.pid;
478
479 for (i = 0; i < dmxdev->filternum; i++)
480 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
481 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
482 dmxdev->filter[i].params.sec.pid == pid) {
483 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
484 return 0;
485 }
486
487 filter->dev->demux->release_section_feed(dmxdev->demux,
488 filter->feed.sec);
489
490 return 0;
491}
492
493static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
494{
495 struct dmxdev_feed *feed;
496 struct dmx_demux *demux;
497
498 if (dmxdevfilter->state < DMXDEV_STATE_GO)
499 return 0;
500
501 switch (dmxdevfilter->type) {
502 case DMXDEV_TYPE_SEC:
503 if (!dmxdevfilter->feed.sec)
504 break;
505 dvb_dmxdev_feed_stop(dmxdevfilter);
506 if (dmxdevfilter->filter.sec)
507 dmxdevfilter->feed.sec->
508 release_filter(dmxdevfilter->feed.sec,
509 dmxdevfilter->filter.sec);
510 dvb_dmxdev_feed_restart(dmxdevfilter);
511 dmxdevfilter->feed.sec = NULL;
512 break;
513 case DMXDEV_TYPE_PES:
514 dvb_dmxdev_feed_stop(dmxdevfilter);
515 demux = dmxdevfilter->dev->demux;
516 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
517 demux->release_ts_feed(demux, feed->ts);
518 feed->ts = NULL;
519 }
520 break;
521 default:
522 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
523 return 0;
524 return -EINVAL;
525 }
526
527 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
528 return 0;
529}
530
531static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
532{
533 struct dmxdev_feed *feed, *tmp;
534
535 /* delete all PIDs */
536 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
537 list_del(&feed->next);
538 kfree(feed);
539 }
540
541 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
542}
543
544static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
545{
546 if (dmxdevfilter->state < DMXDEV_STATE_SET)
547 return 0;
548
549 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
550 dvb_dmxdev_delete_pids(dmxdevfilter);
551
552 dmxdevfilter->type = DMXDEV_TYPE_NONE;
553 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
554 return 0;
555}
556
557static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
558 struct dmxdev_filter *filter,
559 struct dmxdev_feed *feed)
560{
561 struct timespec timeout = { 0 };
562 struct dmx_pes_filter_params *para = &filter->params.pes;
563 dmx_output_t otype;
564 int ret;
565 int ts_type;
566 enum dmx_ts_pes ts_pes;
567 struct dmx_ts_feed *tsfeed;
568
569 feed->ts = NULL;
570 otype = para->output;
571
572 ts_pes = para->pes_type;
573
574 if (ts_pes < DMX_PES_OTHER)
575 ts_type = TS_DECODER;
576 else
577 ts_type = 0;
578
579 if (otype == DMX_OUT_TS_TAP)
580 ts_type |= TS_PACKET;
581 else if (otype == DMX_OUT_TSDEMUX_TAP)
582 ts_type |= TS_PACKET | TS_DEMUX;
583 else if (otype == DMX_OUT_TAP)
584 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
585
586 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
587 dvb_dmxdev_ts_callback);
588 if (ret < 0)
589 return ret;
590
591 tsfeed = feed->ts;
592 tsfeed->priv = filter;
593
594 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, 32768, timeout);
595 if (ret < 0) {
596 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
597 return ret;
598 }
599
600 ret = tsfeed->start_filtering(tsfeed);
601 if (ret < 0) {
602 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
603 return ret;
604 }
605
606 return 0;
607}
608
609static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
610{
611 struct dmxdev *dmxdev = filter->dev;
612 struct dmxdev_feed *feed;
613 void *mem;
614 int ret, i;
615
616 if (filter->state < DMXDEV_STATE_SET)
617 return -EINVAL;
618
619 if (filter->state >= DMXDEV_STATE_GO)
620 dvb_dmxdev_filter_stop(filter);
621
622 if (!filter->buffer.data) {
623 mem = vmalloc(filter->buffer.size);
624 if (!mem)
625 return -ENOMEM;
626 spin_lock_irq(&filter->dev->lock);
627 filter->buffer.data = mem;
628 spin_unlock_irq(&filter->dev->lock);
629 }
630
631 dvb_ringbuffer_flush(&filter->buffer);
632
633 switch (filter->type) {
634 case DMXDEV_TYPE_SEC:
635 {
636 struct dmx_sct_filter_params *para = &filter->params.sec;
637 struct dmx_section_filter **secfilter = &filter->filter.sec;
638 struct dmx_section_feed **secfeed = &filter->feed.sec;
639
640 *secfilter = NULL;
641 *secfeed = NULL;
642
643
644 /* find active filter/feed with same PID */
645 for (i = 0; i < dmxdev->filternum; i++) {
646 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
647 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
648 dmxdev->filter[i].params.sec.pid == para->pid) {
649 *secfeed = dmxdev->filter[i].feed.sec;
650 break;
651 }
652 }
653
654 /* if no feed found, try to allocate new one */
655 if (!*secfeed) {
656 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
657 secfeed,
658 dvb_dmxdev_section_callback);
659 if (ret < 0) {
660 printk("DVB (%s): could not alloc feed\n",
661 __func__);
662 return ret;
663 }
664
665 ret = (*secfeed)->set(*secfeed, para->pid, 32768,
666 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
667 if (ret < 0) {
668 printk("DVB (%s): could not set feed\n",
669 __func__);
670 dvb_dmxdev_feed_restart(filter);
671 return ret;
672 }
673 } else {
674 dvb_dmxdev_feed_stop(filter);
675 }
676
677 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
678 if (ret < 0) {
679 dvb_dmxdev_feed_restart(filter);
680 filter->feed.sec->start_filtering(*secfeed);
681 dprintk("could not get filter\n");
682 return ret;
683 }
684
685 (*secfilter)->priv = filter;
686
687 memcpy(&((*secfilter)->filter_value[3]),
688 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
689 memcpy(&(*secfilter)->filter_mask[3],
690 ¶->filter.mask[1], DMX_FILTER_SIZE - 1);
691 memcpy(&(*secfilter)->filter_mode[3],
692 ¶->filter.mode[1], DMX_FILTER_SIZE - 1);
693
694 (*secfilter)->filter_value[0] = para->filter.filter[0];
695 (*secfilter)->filter_mask[0] = para->filter.mask[0];
696 (*secfilter)->filter_mode[0] = para->filter.mode[0];
697 (*secfilter)->filter_mask[1] = 0;
698 (*secfilter)->filter_mask[2] = 0;
699
700 filter->todo = 0;
701
702 ret = filter->feed.sec->start_filtering(filter->feed.sec);
703 if (ret < 0)
704 return ret;
705
706 dvb_dmxdev_filter_timer(filter);
707 break;
708 }
709 case DMXDEV_TYPE_PES:
710 list_for_each_entry(feed, &filter->feed.ts, next) {
711 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
712 if (ret < 0) {
713 dvb_dmxdev_filter_stop(filter);
714 return ret;
715 }
716 }
717 break;
718 default:
719 return -EINVAL;
720 }
721
722 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
723 return 0;
724}
725
726static int dvb_demux_open(struct inode *inode, struct file *file)
727{
728 struct dvb_device *dvbdev = file->private_data;
729 struct dmxdev *dmxdev = dvbdev->priv;
730 int i;
731 struct dmxdev_filter *dmxdevfilter;
732
733 if (!dmxdev->filter)
734 return -EINVAL;
735
736 if (mutex_lock_interruptible(&dmxdev->mutex))
737 return -ERESTARTSYS;
738
739 for (i = 0; i < dmxdev->filternum; i++)
740 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
741 break;
742
743 if (i == dmxdev->filternum) {
744 mutex_unlock(&dmxdev->mutex);
745 return -EMFILE;
746 }
747
748 dmxdevfilter = &dmxdev->filter[i];
749 mutex_init(&dmxdevfilter->mutex);
750 file->private_data = dmxdevfilter;
751
752 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
753 dmxdevfilter->type = DMXDEV_TYPE_NONE;
754 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
755 init_timer(&dmxdevfilter->timer);
756
757 dvbdev->users++;
758
759 mutex_unlock(&dmxdev->mutex);
760 return 0;
761}
762
763static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
764 struct dmxdev_filter *dmxdevfilter)
765{
766 mutex_lock(&dmxdev->mutex);
767 mutex_lock(&dmxdevfilter->mutex);
768
769 dvb_dmxdev_filter_stop(dmxdevfilter);
770 dvb_dmxdev_filter_reset(dmxdevfilter);
771
772 if (dmxdevfilter->buffer.data) {
773 void *mem = dmxdevfilter->buffer.data;
774
775 spin_lock_irq(&dmxdev->lock);
776 dmxdevfilter->buffer.data = NULL;
777 spin_unlock_irq(&dmxdev->lock);
778 vfree(mem);
779 }
780
781 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
782 wake_up(&dmxdevfilter->buffer.queue);
783 mutex_unlock(&dmxdevfilter->mutex);
784 mutex_unlock(&dmxdev->mutex);
785 return 0;
786}
787
788static inline void invert_mode(dmx_filter_t *filter)
789{
790 int i;
791
792 for (i = 0; i < DMX_FILTER_SIZE; i++)
793 filter->mode[i] ^= 0xff;
794}
795
796static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
797 struct dmxdev_filter *filter, u16 pid)
798{
799 struct dmxdev_feed *feed;
800
801 if ((filter->type != DMXDEV_TYPE_PES) ||
802 (filter->state < DMXDEV_STATE_SET))
803 return -EINVAL;
804
805 /* only TS packet filters may have multiple PIDs */
806 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
807 (!list_empty(&filter->feed.ts)))
808 return -EINVAL;
809
810 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
811 if (feed == NULL)
812 return -ENOMEM;
813
814 feed->pid = pid;
815 list_add(&feed->next, &filter->feed.ts);
816
817 if (filter->state >= DMXDEV_STATE_GO)
818 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
819
820 return 0;
821}
822
823static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
824 struct dmxdev_filter *filter, u16 pid)
825{
826 struct dmxdev_feed *feed, *tmp;
827
828 if ((filter->type != DMXDEV_TYPE_PES) ||
829 (filter->state < DMXDEV_STATE_SET))
830 return -EINVAL;
831
832 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
833 if ((feed->pid == pid) && (feed->ts != NULL)) {
834 feed->ts->stop_filtering(feed->ts);
835 filter->dev->demux->release_ts_feed(filter->dev->demux,
836 feed->ts);
837 list_del(&feed->next);
838 kfree(feed);
839 }
840 }
841
842 return 0;
843}
844
845static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
846 struct dmxdev_filter *dmxdevfilter,
847 struct dmx_sct_filter_params *params)
848{
849 dprintk("function : %s, PID=0x%04x, flags=%02x, timeout=%d\n",
850 __func__, params->pid, params->flags, params->timeout);
851
852 dvb_dmxdev_filter_stop(dmxdevfilter);
853
854 dmxdevfilter->type = DMXDEV_TYPE_SEC;
855 memcpy(&dmxdevfilter->params.sec,
856 params, sizeof(struct dmx_sct_filter_params));
857 invert_mode(&dmxdevfilter->params.sec.filter);
858 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
859
860 if (params->flags & DMX_IMMEDIATE_START)
861 return dvb_dmxdev_filter_start(dmxdevfilter);
862
863 return 0;
864}
865
866static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
867 struct dmxdev_filter *dmxdevfilter,
868 struct dmx_pes_filter_params *params)
869{
870 int ret;
871
872 dvb_dmxdev_filter_stop(dmxdevfilter);
873 dvb_dmxdev_filter_reset(dmxdevfilter);
874
875 if ((unsigned)params->pes_type > DMX_PES_OTHER)
876 return -EINVAL;
877
878 dmxdevfilter->type = DMXDEV_TYPE_PES;
879 memcpy(&dmxdevfilter->params, params,
880 sizeof(struct dmx_pes_filter_params));
881 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
882
883 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
884
885 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
886 dmxdevfilter->params.pes.pid);
887 if (ret < 0)
888 return ret;
889
890 if (params->flags & DMX_IMMEDIATE_START)
891 return dvb_dmxdev_filter_start(dmxdevfilter);
892
893 return 0;
894}
895
896static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
897 struct file *file, char __user *buf,
898 size_t count, loff_t *ppos)
899{
900 int result, hcount;
901 int done = 0;
902
903 if (dfil->todo <= 0) {
904 hcount = 3 + dfil->todo;
905 if (hcount > count)
906 hcount = count;
907 result = dvb_dmxdev_buffer_read(&dfil->buffer,
908 file->f_flags & O_NONBLOCK,
909 buf, hcount, ppos);
910 if (result < 0) {
911 dfil->todo = 0;
912 return result;
913 }
914 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
915 return -EFAULT;
916 buf += result;
917 done = result;
918 count -= result;
919 dfil->todo -= result;
920 if (dfil->todo > -3)
921 return done;
922 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
923 if (!count)
924 return done;
925 }
926 if (count > dfil->todo)
927 count = dfil->todo;
928 result = dvb_dmxdev_buffer_read(&dfil->buffer,
929 file->f_flags & O_NONBLOCK,
930 buf, count, ppos);
931 if (result < 0)
932 return result;
933 dfil->todo -= result;
934 return (result + done);
935}
936
937static ssize_t
938dvb_demux_read(struct file *file, char __user *buf, size_t count,
939 loff_t *ppos)
940{
941 struct dmxdev_filter *dmxdevfilter = file->private_data;
942 int ret;
943
944 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
945 return -ERESTARTSYS;
946
947 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
948 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
949 else
950 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
951 file->f_flags & O_NONBLOCK,
952 buf, count, ppos);
953
954 mutex_unlock(&dmxdevfilter->mutex);
955 return ret;
956}
957
958static int dvb_demux_do_ioctl(struct file *file,
959 unsigned int cmd, void *parg)
960{
961 struct dmxdev_filter *dmxdevfilter = file->private_data;
962 struct dmxdev *dmxdev = dmxdevfilter->dev;
963 unsigned long arg = (unsigned long)parg;
964 int ret = 0;
965
966 if (mutex_lock_interruptible(&dmxdev->mutex))
967 return -ERESTARTSYS;
968
969 switch (cmd) {
970 case DMX_START:
971 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
972 mutex_unlock(&dmxdev->mutex);
973 return -ERESTARTSYS;
974 }
975 if (dmxdevfilter->state < DMXDEV_STATE_SET)
976 ret = -EINVAL;
977 else
978 ret = dvb_dmxdev_filter_start(dmxdevfilter);
979 mutex_unlock(&dmxdevfilter->mutex);
980 break;
981
982 case DMX_STOP:
983 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
984 mutex_unlock(&dmxdev->mutex);
985 return -ERESTARTSYS;
986 }
987 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
988 mutex_unlock(&dmxdevfilter->mutex);
989 break;
990
991 case DMX_SET_FILTER:
992 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
993 mutex_unlock(&dmxdev->mutex);
994 return -ERESTARTSYS;
995 }
996 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
997 mutex_unlock(&dmxdevfilter->mutex);
998 break;
999
1000 case DMX_SET_PES_FILTER:
1001 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1002 mutex_unlock(&dmxdev->mutex);
1003 return -ERESTARTSYS;
1004 }
1005 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1006 mutex_unlock(&dmxdevfilter->mutex);
1007 break;
1008
1009 case DMX_SET_BUFFER_SIZE:
1010 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1011 mutex_unlock(&dmxdev->mutex);
1012 return -ERESTARTSYS;
1013 }
1014 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1015 mutex_unlock(&dmxdevfilter->mutex);
1016 break;
1017
1018 case DMX_GET_PES_PIDS:
1019 if (!dmxdev->demux->get_pes_pids) {
1020 ret = -EINVAL;
1021 break;
1022 }
1023 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1024 break;
1025
1026 case DMX_GET_CAPS:
1027 if (!dmxdev->demux->get_caps) {
1028 ret = -EINVAL;
1029 break;
1030 }
1031 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
1032 break;
1033
1034 case DMX_SET_SOURCE:
1035 if (!dmxdev->demux->set_source) {
1036 ret = -EINVAL;
1037 break;
1038 }
1039 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
1040 break;
1041
1042 case DMX_GET_STC:
1043 if (!dmxdev->demux->get_stc) {
1044 ret = -EINVAL;
1045 break;
1046 }
1047 ret = dmxdev->demux->get_stc(dmxdev->demux,
1048 ((struct dmx_stc *)parg)->num,
1049 &((struct dmx_stc *)parg)->stc,
1050 &((struct dmx_stc *)parg)->base);
1051 break;
1052
1053 case DMX_ADD_PID:
1054 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1055 ret = -ERESTARTSYS;
1056 break;
1057 }
1058 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1059 mutex_unlock(&dmxdevfilter->mutex);
1060 break;
1061
1062 case DMX_REMOVE_PID:
1063 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1064 ret = -ERESTARTSYS;
1065 break;
1066 }
1067 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1068 mutex_unlock(&dmxdevfilter->mutex);
1069 break;
1070
1071 default:
1072 ret = -EINVAL;
1073 break;
1074 }
1075 mutex_unlock(&dmxdev->mutex);
1076 return ret;
1077}
1078
1079static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1080 unsigned long arg)
1081{
1082 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1083}
1084
1085static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
1086{
1087 struct dmxdev_filter *dmxdevfilter = file->private_data;
1088 unsigned int mask = 0;
1089
1090 if (!dmxdevfilter)
1091 return -EINVAL;
1092
1093 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1094
1095 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1096 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1097 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1098 return 0;
1099
1100 if (dmxdevfilter->buffer.error)
1101 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1102
1103 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1104 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1105
1106 return mask;
1107}
1108
1109static int dvb_demux_release(struct inode *inode, struct file *file)
1110{
1111 struct dmxdev_filter *dmxdevfilter = file->private_data;
1112 struct dmxdev *dmxdev = dmxdevfilter->dev;
1113
1114 int ret;
1115
1116 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1117
1118 mutex_lock(&dmxdev->mutex);
1119 dmxdev->dvbdev->users--;
1120 if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
1121 mutex_unlock(&dmxdev->mutex);
1122 wake_up(&dmxdev->dvbdev->wait_queue);
1123 } else
1124 mutex_unlock(&dmxdev->mutex);
1125
1126 return ret;
1127}
1128
1129static const struct file_operations dvb_demux_fops = {
1130 .owner = THIS_MODULE,
1131 .read = dvb_demux_read,
1132 .unlocked_ioctl = dvb_demux_ioctl,
1133 .open = dvb_demux_open,
1134 .release = dvb_demux_release,
1135 .poll = dvb_demux_poll,
1136 .llseek = default_llseek,
1137};
1138
1139static struct dvb_device dvbdev_demux = {
1140 .priv = NULL,
1141 .users = 1,
1142 .writers = 1,
1143 .fops = &dvb_demux_fops
1144};
1145
1146static int dvb_dvr_do_ioctl(struct file *file,
1147 unsigned int cmd, void *parg)
1148{
1149 struct dvb_device *dvbdev = file->private_data;
1150 struct dmxdev *dmxdev = dvbdev->priv;
1151 unsigned long arg = (unsigned long)parg;
1152 int ret;
1153
1154 if (mutex_lock_interruptible(&dmxdev->mutex))
1155 return -ERESTARTSYS;
1156
1157 switch (cmd) {
1158 case DMX_SET_BUFFER_SIZE:
1159 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1160 break;
1161
1162 default:
1163 ret = -EINVAL;
1164 break;
1165 }
1166 mutex_unlock(&dmxdev->mutex);
1167 return ret;
1168}
1169
1170static long dvb_dvr_ioctl(struct file *file,
1171 unsigned int cmd, unsigned long arg)
1172{
1173 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1174}
1175
1176static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1177{
1178 struct dvb_device *dvbdev = file->private_data;
1179 struct dmxdev *dmxdev = dvbdev->priv;
1180 unsigned int mask = 0;
1181
1182 dprintk("function : %s\n", __func__);
1183
1184 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1185
1186 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1187 if (dmxdev->dvr_buffer.error)
1188 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1189
1190 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1191 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1192 } else
1193 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1194
1195 return mask;
1196}
1197
1198static const struct file_operations dvb_dvr_fops = {
1199 .owner = THIS_MODULE,
1200 .read = dvb_dvr_read,
1201 .write = dvb_dvr_write,
1202 .unlocked_ioctl = dvb_dvr_ioctl,
1203 .open = dvb_dvr_open,
1204 .release = dvb_dvr_release,
1205 .poll = dvb_dvr_poll,
1206 .llseek = default_llseek,
1207};
1208
1209static struct dvb_device dvbdev_dvr = {
1210 .priv = NULL,
1211 .readers = 1,
1212 .users = 1,
1213 .fops = &dvb_dvr_fops
1214};
1215
1216int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1217{
1218 int i;
1219
1220 if (dmxdev->demux->open(dmxdev->demux) < 0)
1221 return -EUSERS;
1222
1223 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1224 if (!dmxdev->filter)
1225 return -ENOMEM;
1226
1227 mutex_init(&dmxdev->mutex);
1228 spin_lock_init(&dmxdev->lock);
1229 for (i = 0; i < dmxdev->filternum; i++) {
1230 dmxdev->filter[i].dev = dmxdev;
1231 dmxdev->filter[i].buffer.data = NULL;
1232 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1233 DMXDEV_STATE_FREE);
1234 }
1235
1236 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1237 DVB_DEVICE_DEMUX);
1238 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1239 dmxdev, DVB_DEVICE_DVR);
1240
1241 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1242
1243 return 0;
1244}
1245
1246EXPORT_SYMBOL(dvb_dmxdev_init);
1247
1248void dvb_dmxdev_release(struct dmxdev *dmxdev)
1249{
1250 dmxdev->exit=1;
1251 if (dmxdev->dvbdev->users > 1) {
1252 wait_event(dmxdev->dvbdev->wait_queue,
1253 dmxdev->dvbdev->users==1);
1254 }
1255 if (dmxdev->dvr_dvbdev->users > 1) {
1256 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1257 dmxdev->dvr_dvbdev->users==1);
1258 }
1259
1260 dvb_unregister_device(dmxdev->dvbdev);
1261 dvb_unregister_device(dmxdev->dvr_dvbdev);
1262
1263 vfree(dmxdev->filter);
1264 dmxdev->filter = NULL;
1265 dmxdev->demux->close(dmxdev->demux);
1266}
1267
1268EXPORT_SYMBOL(dvb_dmxdev_release);