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[PATCH] dvb: core: demux error handling fix
[net-next-2.6.git] / drivers / media / dvb / dvb-core / dmxdev.c
CommitLineData
1da177e4
LT		 1/*
2 * dmxdev.c - DVB demultiplexer device
3 *
4 * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
5 * & Marcus Metzler <marcus@convergence.de>
6 for convergence integrated media GmbH
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23
24#include <linux/spinlock.h>
25#include <linux/slab.h>
26#include <linux/vmalloc.h>
27#include <linux/module.h>
28#include <linux/moduleparam.h>
29#include <linux/sched.h>
30#include <linux/poll.h>
31#include <linux/ioctl.h>
32#include <linux/wait.h>
33#include <asm/uaccess.h>
34#include <asm/system.h>
35
36#include "dmxdev.h"
37
38static int debug;
39
40module_param(debug, int, 0644);
41MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
42
43#define dprintk if (debug) printk
44
45static inline struct dmxdev_filter *
46dvb_dmxdev_file_to_filter(struct file *file)
47{
48 return (struct dmxdev_filter *) file->private_data;
49}
50
51static inline void dvb_dmxdev_buffer_init(struct dmxdev_buffer *buffer)
52{
53 buffer->data=NULL;
54 buffer->size=8192;
55 buffer->pread=0;
56 buffer->pwrite=0;
57 buffer->error=0;
58 init_waitqueue_head(&buffer->queue);
59}
60
61static inline int dvb_dmxdev_buffer_write(struct dmxdev_buffer *buf, const u8 *src, int len)
62{
63 int split;
64 int free;
65 int todo;
66
67 if (!len)
68 return 0;
69 if (!buf->data)
70 return 0;
71
72 free=buf->pread-buf->pwrite;
73 split=0;
74 if (free<=0) {
75 free+=buf->size;
76 split=buf->size-buf->pwrite;
77 }
78 if (len>=free) {
79 dprintk("dmxdev: buffer overflow\n");
80 return -1;
81 }
82 if (split>=len)
83 split=0;
84 todo=len;
85 if (split) {
86 memcpy(buf->data + buf->pwrite, src, split);
87 todo-=split;
88 buf->pwrite=0;
89 }
90 memcpy(buf->data + buf->pwrite, src+split, todo);
91 buf->pwrite=(buf->pwrite+todo)%buf->size;
92 return len;
93}
94
95static ssize_t dvb_dmxdev_buffer_read(struct dmxdev_buffer *src,
96 int non_blocking, char __user *buf, size_t count, loff_t *ppos)
97{
98 unsigned long todo=count;
99 int split, avail, error;
100
101 if (!src->data)
102 return 0;
103
104 if ((error=src->error)) {
105 src->pwrite=src->pread;
106 src->error=0;
107 return error;
108 }
109
110 if (non_blocking && (src->pwrite==src->pread))
111 return -EWOULDBLOCK;
112
113 while (todo>0) {
114 if (non_blocking && (src->pwrite==src->pread))
115 return (count-todo) ? (count-todo) : -EWOULDBLOCK;
116
117 if (wait_event_interruptible(src->queue,
118 (src->pread!=src->pwrite) ||
119 (src->error))<0)
120 return count-todo;
121
122 if ((error=src->error)) {
123 src->pwrite=src->pread;
124 src->error=0;
125 return error;
126 }
127
128 split=src->size;
129 avail=src->pwrite - src->pread;
130 if (avail<0) {
131 avail+=src->size;
132 split=src->size - src->pread;
133 }
134 if (avail>todo)
135 avail=todo;
136 if (split<avail) {
137 if (copy_to_user(buf, src->data+src->pread, split))
138 return -EFAULT;
139 buf+=split;
140 src->pread=0;
141 todo-=split;
142 avail-=split;
143 }
144 if (avail) {
145 if (copy_to_user(buf, src->data+src->pread, avail))
146 return -EFAULT;
147 src->pread = (src->pread + avail) % src->size;
148 todo-=avail;
149 buf+=avail;
150 }
151 }
152 return count;
153}
154
155static struct dmx_frontend * get_fe(struct dmx_demux *demux, int type)
156{
157 struct list_head *head, *pos;
158
159 head=demux->get_frontends(demux);
160 if (!head)
161 return NULL;
162 list_for_each(pos, head)
163 if (DMX_FE_ENTRY(pos)->source==type)
164 return DMX_FE_ENTRY(pos);
165
166 return NULL;
167}
168
169static inline void dvb_dmxdev_dvr_state_set(struct dmxdev_dvr *dmxdevdvr, int state)
170{
171 spin_lock_irq(&dmxdevdvr->dev->lock);
172 dmxdevdvr->state=state;
173 spin_unlock_irq(&dmxdevdvr->dev->lock);
174}
175
176static int dvb_dvr_open(struct inode *inode, struct file *file)
177{
0c53c70f
JS		 178 struct dvb_device *dvbdev = file->private_data;
179 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 180 struct dmx_frontend *front;
181
182 dprintk ("function : %s\n", __FUNCTION__);
183
184 if (down_interruptible (&dmxdev->mutex))
185 return -ERESTARTSYS;
186
187 if ((file->f_flags&O_ACCMODE)==O_RDWR) {
188 if (!(dmxdev->capabilities&DMXDEV_CAP_DUPLEX)) {
189 up(&dmxdev->mutex);
190 return -EOPNOTSUPP;
191 }
192 }
193
194 if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
195 dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
196 dmxdev->dvr_buffer.size=DVR_BUFFER_SIZE;
197 dmxdev->dvr_buffer.data=vmalloc(DVR_BUFFER_SIZE);
198 if (!dmxdev->dvr_buffer.data) {
199 up(&dmxdev->mutex);
200 return -ENOMEM;
201 }
202 }
203
204 if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
205 dmxdev->dvr_orig_fe=dmxdev->demux->frontend;
206
207 if (!dmxdev->demux->write) {
208 up(&dmxdev->mutex);
209 return -EOPNOTSUPP;
210 }
211
212 front=get_fe(dmxdev->demux, DMX_MEMORY_FE);
213
214 if (!front) {
215 up(&dmxdev->mutex);
216 return -EINVAL;
217 }
218 dmxdev->demux->disconnect_frontend(dmxdev->demux);
219 dmxdev->demux->connect_frontend(dmxdev->demux, front);
220 }
221 up(&dmxdev->mutex);
222 return 0;
223}
224
225static int dvb_dvr_release(struct inode *inode, struct file *file)
226{
0c53c70f
JS		 227 struct dvb_device *dvbdev = file->private_data;
228 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 229
230 if (down_interruptible (&dmxdev->mutex))
231 return -ERESTARTSYS;
232
233 if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
234 dmxdev->demux->disconnect_frontend(dmxdev->demux);
235 dmxdev->demux->connect_frontend(dmxdev->demux,
236 dmxdev->dvr_orig_fe);
237 }
238 if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
239 if (dmxdev->dvr_buffer.data) {
240 void *mem=dmxdev->dvr_buffer.data;
241 mb();
242 spin_lock_irq(&dmxdev->lock);
243 dmxdev->dvr_buffer.data=NULL;
244 spin_unlock_irq(&dmxdev->lock);
245 vfree(mem);
246 }
247 }
248 up(&dmxdev->mutex);
249 return 0;
250}
251
252static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
253 size_t count, loff_t *ppos)
254{
0c53c70f
JS		 255 struct dvb_device *dvbdev = file->private_data;
256 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 257 int ret;
258
259 if (!dmxdev->demux->write)
260 return -EOPNOTSUPP;
261 if ((file->f_flags&O_ACCMODE)!=O_WRONLY)
262 return -EINVAL;
263 if (down_interruptible (&dmxdev->mutex))
264 return -ERESTARTSYS;
265 ret=dmxdev->demux->write(dmxdev->demux, buf, count);
266 up(&dmxdev->mutex);
267 return ret;
268}
269
270static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
271 loff_t *ppos)
272{
0c53c70f
JS		 273 struct dvb_device *dvbdev = file->private_data;
274 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 275 int ret;
276
277 //down(&dmxdev->mutex);
278 ret= dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
279 file->f_flags&O_NONBLOCK,
280 buf, count, ppos);
281 //up(&dmxdev->mutex);
282 return ret;
283}
284
285static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter *dmxdevfilter, int state)
286{
287 spin_lock_irq(&dmxdevfilter->dev->lock);
288 dmxdevfilter->state=state;
289 spin_unlock_irq(&dmxdevfilter->dev->lock);
290}
291
292static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter, unsigned long size)
293{
294 struct dmxdev_buffer *buf=&dmxdevfilter->buffer;
295 void *mem;
296
297 if (buf->size==size)
298 return 0;
299 if (dmxdevfilter->state>=DMXDEV_STATE_GO)
300 return -EBUSY;
301 spin_lock_irq(&dmxdevfilter->dev->lock);
302 mem=buf->data;
303 buf->data=NULL;
304 buf->size=size;
305 buf->pwrite=buf->pread=0;
306 spin_unlock_irq(&dmxdevfilter->dev->lock);
307 vfree(mem);
308
309 if (buf->size) {
310 mem=vmalloc(dmxdevfilter->buffer.size);
311 if (!mem)
312 return -ENOMEM;
313 spin_lock_irq(&dmxdevfilter->dev->lock);
314 buf->data=mem;
315 spin_unlock_irq(&dmxdevfilter->dev->lock);
316 }
317 return 0;
318}
319
320static void dvb_dmxdev_filter_timeout(unsigned long data)
321{
322 struct dmxdev_filter *dmxdevfilter=(struct dmxdev_filter *)data;
323
324 dmxdevfilter->buffer.error=-ETIMEDOUT;
325 spin_lock_irq(&dmxdevfilter->dev->lock);
326 dmxdevfilter->state=DMXDEV_STATE_TIMEDOUT;
327 spin_unlock_irq(&dmxdevfilter->dev->lock);
328 wake_up(&dmxdevfilter->buffer.queue);
329}
330
331static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
332{
333 struct dmx_sct_filter_params *para=&dmxdevfilter->params.sec;
334
335 del_timer(&dmxdevfilter->timer);
336 if (para->timeout) {
337 dmxdevfilter->timer.function=dvb_dmxdev_filter_timeout;
338 dmxdevfilter->timer.data=(unsigned long) dmxdevfilter;
339 dmxdevfilter->timer.expires=jiffies+1+(HZ/2+HZ*para->timeout)/1000;
340 add_timer(&dmxdevfilter->timer);
341 }
342}
343
344static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
345 const u8 *buffer2, size_t buffer2_len,
346 struct dmx_section_filter *filter, enum dmx_success success)
347{
0c53c70f 348 struct dmxdev_filter *dmxdevfilter = filter->priv;
1da177e4
LT		 349 int ret;
350
351 if (dmxdevfilter->buffer.error) {
352 wake_up(&dmxdevfilter->buffer.queue);
353 return 0;
354 }
355 spin_lock(&dmxdevfilter->dev->lock);
356 if (dmxdevfilter->state!=DMXDEV_STATE_GO) {
357 spin_unlock(&dmxdevfilter->dev->lock);
358 return 0;
359 }
360 del_timer(&dmxdevfilter->timer);
361 dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
362 buffer1[0], buffer1[1],
363 buffer1[2], buffer1[3],
364 buffer1[4], buffer1[5]);
365 ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1, buffer1_len);
366 if (ret==buffer1_len) {
367 ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2, buffer2_len);
368 }
369 if (ret<0) {
370 dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread;
371 dmxdevfilter->buffer.error=-EOVERFLOW;
372 }
373 if (dmxdevfilter->params.sec.flags&DMX_ONESHOT)
374 dmxdevfilter->state=DMXDEV_STATE_DONE;
375 spin_unlock(&dmxdevfilter->dev->lock);
376 wake_up(&dmxdevfilter->buffer.queue);
377 return 0;
378}
379
380static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
381 const u8 *buffer2, size_t buffer2_len,
382 struct dmx_ts_feed *feed, enum dmx_success success)
383{
0c53c70f 384 struct dmxdev_filter *dmxdevfilter = feed->priv;
1da177e4
LT		 385 struct dmxdev_buffer *buffer;
386 int ret;
387
388 spin_lock(&dmxdevfilter->dev->lock);
389 if (dmxdevfilter->params.pes.output==DMX_OUT_DECODER) {
390 spin_unlock(&dmxdevfilter->dev->lock);
391 return 0;
392 }
393
394 if (dmxdevfilter->params.pes.output==DMX_OUT_TAP)
395 buffer=&dmxdevfilter->buffer;
396 else
397 buffer=&dmxdevfilter->dev->dvr_buffer;
398 if (buffer->error) {
399 spin_unlock(&dmxdevfilter->dev->lock);
400 wake_up(&buffer->queue);
401 return 0;
402 }
403 ret=dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
404 if (ret==buffer1_len)
405 ret=dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
406 if (ret<0) {
407 buffer->pwrite=buffer->pread;
408 buffer->error=-EOVERFLOW;
409 }
410 spin_unlock(&dmxdevfilter->dev->lock);
411 wake_up(&buffer->queue);
412 return 0;
413}
414
415
416/* stop feed but only mark the specified filter as stopped (state set) */
417
418static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
419{
420 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
421
422 switch (dmxdevfilter->type) {
423 case DMXDEV_TYPE_SEC:
424 del_timer(&dmxdevfilter->timer);
425 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
426 break;
427 case DMXDEV_TYPE_PES:
428 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
429 break;
430 default:
431 return -EINVAL;
432 }
433 return 0;
434}
435
436
437/* start feed associated with the specified filter */
438
439static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
440{
441 dvb_dmxdev_filter_state_set (filter, DMXDEV_STATE_GO);
442
443 switch (filter->type) {
444 case DMXDEV_TYPE_SEC:
445 return filter->feed.sec->start_filtering(filter->feed.sec);
446 break;
447 case DMXDEV_TYPE_PES:
448 return filter->feed.ts->start_filtering(filter->feed.ts);
449 break;
450 default:
451 return -EINVAL;
452 }
453
454 return 0;
455}
456
457
458/* restart section feed if it has filters left associated with it,
459 otherwise release the feed */
460
461static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
462{
463 int i;
464 struct dmxdev *dmxdev = filter->dev;
465 u16 pid = filter->params.sec.pid;
466
467 for (i=0; i<dmxdev->filternum; i++)
468 if (dmxdev->filter[i].state>=DMXDEV_STATE_GO &&
469 dmxdev->filter[i].type==DMXDEV_TYPE_SEC &&
470 dmxdev->filter[i].pid==pid) {
471 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
472 return 0;
473 }
474
475 filter->dev->demux->release_section_feed(dmxdev->demux, filter->feed.sec);
476
477 return 0;
478}
479
480static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
481{
482 if (dmxdevfilter->state<DMXDEV_STATE_GO)
483 return 0;
484
485 switch (dmxdevfilter->type) {
486 case DMXDEV_TYPE_SEC:
487 if (!dmxdevfilter->feed.sec)
488 break;
489 dvb_dmxdev_feed_stop(dmxdevfilter);
490 if (dmxdevfilter->filter.sec)
491 dmxdevfilter->feed.sec->
492 release_filter(dmxdevfilter->feed.sec,
493 dmxdevfilter->filter.sec);
494 dvb_dmxdev_feed_restart(dmxdevfilter);
495 dmxdevfilter->feed.sec=NULL;
496 break;
497 case DMXDEV_TYPE_PES:
498 if (!dmxdevfilter->feed.ts)
499 break;
500 dvb_dmxdev_feed_stop(dmxdevfilter);
501 dmxdevfilter->dev->demux->
502 release_ts_feed(dmxdevfilter->dev->demux,
503 dmxdevfilter->feed.ts);
504 dmxdevfilter->feed.ts=NULL;
505 break;
506 default:
507 if (dmxdevfilter->state==DMXDEV_STATE_ALLOCATED)
508 return 0;
509 return -EINVAL;
510 }
511 dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread=0;
512 return 0;
513}
514
515static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
516{
517 if (dmxdevfilter->state<DMXDEV_STATE_SET)
518 return 0;
519
520 dmxdevfilter->type=DMXDEV_TYPE_NONE;
521 dmxdevfilter->pid=0xffff;
522 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
523 return 0;
524}
525
526static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
527{
528 struct dmxdev *dmxdev = filter->dev;
529 void *mem;
530 int ret, i;
531
532 if (filter->state < DMXDEV_STATE_SET)
533 return -EINVAL;
534
535 if (filter->state >= DMXDEV_STATE_GO)
536 dvb_dmxdev_filter_stop(filter);
537
538 if (!(mem = filter->buffer.data)) {
539 mem = vmalloc(filter->buffer.size);
540 spin_lock_irq(&filter->dev->lock);
541 filter->buffer.data=mem;
542 spin_unlock_irq(&filter->dev->lock);
543 if (!filter->buffer.data)
544 return -ENOMEM;
545 }
546
547 filter->buffer.pwrite = filter->buffer.pread = 0;
548
549 switch (filter->type) {
550 case DMXDEV_TYPE_SEC:
551 {
552 struct dmx_sct_filter_params *para=&filter->params.sec;
553 struct dmx_section_filter **secfilter=&filter->filter.sec;
554 struct dmx_section_feed **secfeed=&filter->feed.sec;
555
556 *secfilter=NULL;
557 *secfeed=NULL;
558
559 /* find active filter/feed with same PID */
560 for (i=0; i<dmxdev->filternum; i++) {
561 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
562 dmxdev->filter[i].pid == para->pid &&
563 dmxdev->filter[i].type == DMXDEV_TYPE_SEC) {
564 *secfeed = dmxdev->filter[i].feed.sec;
565 break;
566 }
567 }
568
569 /* if no feed found, try to allocate new one */
570 if (!*secfeed) {
571 ret=dmxdev->demux->allocate_section_feed(dmxdev->demux,
572 secfeed,
573 dvb_dmxdev_section_callback);
574 if (ret<0) {
575 printk ("DVB (%s): could not alloc feed\n",
576 __FUNCTION__);
577 return ret;
578 }
579
580 ret=(*secfeed)->set(*secfeed, para->pid, 32768, 0,
581 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
582
583 if (ret<0) {
584 printk ("DVB (%s): could not set feed\n",
585 __FUNCTION__);
586 dvb_dmxdev_feed_restart(filter);
587 return ret;
588 }
589 } else {
590 dvb_dmxdev_feed_stop(filter);
591 }
592
593 ret=(*secfeed)->allocate_filter(*secfeed, secfilter);
594
595 if (ret < 0) {
596 dvb_dmxdev_feed_restart(filter);
597 filter->feed.sec->start_filtering(*secfeed);
598 dprintk ("could not get filter\n");
599 return ret;
600 }
601
602 (*secfilter)->priv = filter;
603
604 memcpy(&((*secfilter)->filter_value[3]),
605 &(para->filter.filter[1]), DMX_FILTER_SIZE-1);
606 memcpy(&(*secfilter)->filter_mask[3],
607 &para->filter.mask[1], DMX_FILTER_SIZE-1);
608 memcpy(&(*secfilter)->filter_mode[3],
609 &para->filter.mode[1], DMX_FILTER_SIZE-1);
610
611 (*secfilter)->filter_value[0]=para->filter.filter[0];
612 (*secfilter)->filter_mask[0]=para->filter.mask[0];
613 (*secfilter)->filter_mode[0]=para->filter.mode[0];
614 (*secfilter)->filter_mask[1]=0;
615 (*secfilter)->filter_mask[2]=0;
616
617 filter->todo = 0;
618
619 ret = filter->feed.sec->start_filtering (filter->feed.sec);
620
621 if (ret < 0)
622 return ret;
623
624 dvb_dmxdev_filter_timer(filter);
625 break;
626 }
627
628 case DMXDEV_TYPE_PES:
629 {
630 struct timespec timeout = { 0 };
631 struct dmx_pes_filter_params *para = &filter->params.pes;
632 dmx_output_t otype;
633 int ret;
634 int ts_type;
635 enum dmx_ts_pes ts_pes;
636 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
637
638 filter->feed.ts = NULL;
639 otype=para->output;
640
641 ts_pes=(enum dmx_ts_pes) para->pes_type;
642
643 if (ts_pes<DMX_PES_OTHER)
644 ts_type=TS_DECODER;
645 else
646 ts_type=0;
647
648 if (otype == DMX_OUT_TS_TAP)
649 ts_type |= TS_PACKET;
650
651 if (otype == DMX_OUT_TAP)
652 ts_type |= TS_PAYLOAD_ONLY|TS_PACKET;
653
654 ret=dmxdev->demux->allocate_ts_feed(dmxdev->demux,
655 tsfeed,
656 dvb_dmxdev_ts_callback);
657 if (ret<0)
658 return ret;
659
660 (*tsfeed)->priv = (void *) filter;
661
662 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
663 188, 32768, 0, timeout);
664
665 if (ret < 0) {
666 dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed);
667 return ret;
668 }
669
670 ret = filter->feed.ts->start_filtering(filter->feed.ts);
671
76197924
PB		 672 if (ret < 0) {
673 dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed);
1da177e4 674 return ret;
76197924 675 }
1da177e4
LT		 676
677 break;
678 }
679 default:
680 return -EINVAL;
681 }
682
683 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
684 return 0;
685}
686
687static int dvb_demux_open(struct inode *inode, struct file *file)
688{
0c53c70f
JS		 689 struct dvb_device *dvbdev = file->private_data;
690 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 691 int i;
692 struct dmxdev_filter *dmxdevfilter;
693
694 if (!dmxdev->filter)
695 return -EINVAL;
696
697 if (down_interruptible(&dmxdev->mutex))
698 return -ERESTARTSYS;
699
700 for (i=0; i<dmxdev->filternum; i++)
701 if (dmxdev->filter[i].state==DMXDEV_STATE_FREE)
702 break;
703
704 if (i==dmxdev->filternum) {
705 up(&dmxdev->mutex);
706 return -EMFILE;
707 }
708
709 dmxdevfilter=&dmxdev->filter[i];
710 sema_init(&dmxdevfilter->mutex, 1);
711 dmxdevfilter->dvbdev=dmxdev->dvbdev;
712 file->private_data=dmxdevfilter;
713
714 dvb_dmxdev_buffer_init(&dmxdevfilter->buffer);
715 dmxdevfilter->type=DMXDEV_TYPE_NONE;
716 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
717 dmxdevfilter->feed.ts=NULL;
718 init_timer(&dmxdevfilter->timer);
719
720 up(&dmxdev->mutex);
721 return 0;
722}
723
724
725static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter)
726{
727 if (down_interruptible(&dmxdev->mutex))
728 return -ERESTARTSYS;
729
730 if (down_interruptible(&dmxdevfilter->mutex)) {
731 up(&dmxdev->mutex);
732 return -ERESTARTSYS;
733 }
734
735 dvb_dmxdev_filter_stop(dmxdevfilter);
736 dvb_dmxdev_filter_reset(dmxdevfilter);
737
738 if (dmxdevfilter->buffer.data) {
739 void *mem=dmxdevfilter->buffer.data;
740
741 spin_lock_irq(&dmxdev->lock);
742 dmxdevfilter->buffer.data=NULL;
743 spin_unlock_irq(&dmxdev->lock);
744 vfree(mem);
745 }
746
747 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
748 wake_up(&dmxdevfilter->buffer.queue);
749 up(&dmxdevfilter->mutex);
750 up(&dmxdev->mutex);
751 return 0;
752}
753
754static inline void invert_mode(dmx_filter_t *filter)
755{
756 int i;
757
758 for (i=0; i<DMX_FILTER_SIZE; i++)
759 filter->mode[i]^=0xff;
760}
761
762
763static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
764 struct dmxdev_filter *dmxdevfilter,
765 struct dmx_sct_filter_params *params)
766{
767 dprintk ("function : %s\n", __FUNCTION__);
768
769 dvb_dmxdev_filter_stop(dmxdevfilter);
770
771 dmxdevfilter->type=DMXDEV_TYPE_SEC;
772 dmxdevfilter->pid=params->pid;
773 memcpy(&dmxdevfilter->params.sec,
774 params, sizeof(struct dmx_sct_filter_params));
775 invert_mode(&dmxdevfilter->params.sec.filter);
776 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
777
778 if (params->flags&DMX_IMMEDIATE_START)
779 return dvb_dmxdev_filter_start(dmxdevfilter);
780
781 return 0;
782}
783
784static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
785 struct dmxdev_filter *dmxdevfilter,
786 struct dmx_pes_filter_params *params)
787{
788 dvb_dmxdev_filter_stop(dmxdevfilter);
789
790 if (params->pes_type>DMX_PES_OTHER || params->pes_type<0)
791 return -EINVAL;
792
793 dmxdevfilter->type=DMXDEV_TYPE_PES;
794 dmxdevfilter->pid=params->pid;
795 memcpy(&dmxdevfilter->params, params, sizeof(struct dmx_pes_filter_params));
796
797 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
798
799 if (params->flags&DMX_IMMEDIATE_START)
800 return dvb_dmxdev_filter_start(dmxdevfilter);
801
802 return 0;
803}
804
805static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
806 struct file *file, char __user *buf, size_t count, loff_t *ppos)
807{
808 int result, hcount;
809 int done=0;
810
811 if (dfil->todo<=0) {
812 hcount=3+dfil->todo;
813 if (hcount>count)
814 hcount=count;
815 result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK,
816 buf, hcount, ppos);
817 if (result<0) {
818 dfil->todo=0;
819 return result;
820 }
821 if (copy_from_user(dfil->secheader-dfil->todo, buf, result))
822 return -EFAULT;
823 buf+=result;
824 done=result;
825 count-=result;
826 dfil->todo-=result;
827 if (dfil->todo>-3)
828 return done;
829 dfil->todo=((dfil->secheader[1]<<8)|dfil->secheader[2])&0xfff;
830 if (!count)
831 return done;
832 }
833 if (count>dfil->todo)
834 count=dfil->todo;
835 result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK,
836 buf, count, ppos);
837 if (result<0)
838 return result;
839 dfil->todo-=result;
840 return (result+done);
841}
842
843
844static ssize_t
845dvb_demux_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
846{
847 struct dmxdev_filter *dmxdevfilter=dvb_dmxdev_file_to_filter(file);
848 int ret=0;
849
850 if (down_interruptible(&dmxdevfilter->mutex))
851 return -ERESTARTSYS;
852
853 if (dmxdevfilter->type==DMXDEV_TYPE_SEC)
854 ret=dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
855 else
856 ret=dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
857 file->f_flags&O_NONBLOCK,
858 buf, count, ppos);
859
860 up(&dmxdevfilter->mutex);
861 return ret;
862}
863
864
865static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
866 unsigned int cmd, void *parg)
867{
868 struct dmxdev_filter *dmxdevfilter=dvb_dmxdev_file_to_filter(file);
869 struct dmxdev *dmxdev=dmxdevfilter->dev;
870 unsigned long arg=(unsigned long) parg;
871 int ret=0;
872
873 if (down_interruptible (&dmxdev->mutex))
874 return -ERESTARTSYS;
875
876 switch (cmd) {
877 case DMX_START:
878 if (down_interruptible(&dmxdevfilter->mutex)) {
879 up(&dmxdev->mutex);
880 return -ERESTARTSYS;
881 }
882 if (dmxdevfilter->state<DMXDEV_STATE_SET)
883 ret = -EINVAL;
884 else
885 ret = dvb_dmxdev_filter_start(dmxdevfilter);
886 up(&dmxdevfilter->mutex);
887 break;
888
889 case DMX_STOP:
890 if (down_interruptible(&dmxdevfilter->mutex)) {
891 up(&dmxdev->mutex);
892 return -ERESTARTSYS;
893 }
894 ret=dvb_dmxdev_filter_stop(dmxdevfilter);
895 up(&dmxdevfilter->mutex);
896 break;
897
898 case DMX_SET_FILTER:
899 if (down_interruptible(&dmxdevfilter->mutex)) {
900 up(&dmxdev->mutex);
901 return -ERESTARTSYS;
902 }
903 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter,
904 (struct dmx_sct_filter_params *)parg);
905 up(&dmxdevfilter->mutex);
906 break;
907
908 case DMX_SET_PES_FILTER:
909 if (down_interruptible(&dmxdevfilter->mutex)) {
910 up(&dmxdev->mutex);
911 return -ERESTARTSYS;
912 }
913 ret=dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter,
914 (struct dmx_pes_filter_params *)parg);
915 up(&dmxdevfilter->mutex);
916 break;
917
918 case DMX_SET_BUFFER_SIZE:
919 if (down_interruptible(&dmxdevfilter->mutex)) {
920 up(&dmxdev->mutex);
921 return -ERESTARTSYS;
922 }
923 ret=dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
924 up(&dmxdevfilter->mutex);
925 break;
926
927 case DMX_GET_EVENT:
928 break;
929
930 case DMX_GET_PES_PIDS:
931 if (!dmxdev->demux->get_pes_pids) {
932 ret=-EINVAL;
933 break;
934 }
935 dmxdev->demux->get_pes_pids(dmxdev->demux, (u16 *)parg);
936 break;
937
938 case DMX_GET_STC:
939 if (!dmxdev->demux->get_stc) {
940 ret=-EINVAL;
941 break;
942 }
943 ret = dmxdev->demux->get_stc(dmxdev->demux,
944 ((struct dmx_stc *)parg)->num,
945 &((struct dmx_stc *)parg)->stc,
946 &((struct dmx_stc *)parg)->base);
947 break;
948
949 default:
950 ret=-EINVAL;
951 }
952 up(&dmxdev->mutex);
953 return ret;
954}
955
956static int dvb_demux_ioctl(struct inode *inode, struct file *file,
957 unsigned int cmd, unsigned long arg)
958{
959 return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
960}
961
962
963static unsigned int dvb_demux_poll (struct file *file, poll_table *wait)
964{
965 struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file);
966 unsigned int mask = 0;
967
968 if (!dmxdevfilter)
969 return -EINVAL;
970
971 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
972
973 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
974 dmxdevfilter->state != DMXDEV_STATE_DONE &&
975 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
976 return 0;
977
978 if (dmxdevfilter->buffer.error)
979 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
980
981 if (dmxdevfilter->buffer.pread != dmxdevfilter->buffer.pwrite)
982 mask |= (POLLIN | POLLRDNORM | POLLPRI);
983
984 return mask;
985}
986
987
988static int dvb_demux_release(struct inode *inode, struct file *file)
989{
990 struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file);
991 struct dmxdev *dmxdev = dmxdevfilter->dev;
992
993 return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
994}
995
996
997static struct file_operations dvb_demux_fops = {
998 .owner = THIS_MODULE,
999 .read = dvb_demux_read,
1000 .ioctl = dvb_demux_ioctl,
1001 .open = dvb_demux_open,
1002 .release = dvb_demux_release,
1003 .poll = dvb_demux_poll,
1004};
1005
1006
1007static struct dvb_device dvbdev_demux = {
1008 .priv = NULL,
1009 .users = 1,
1010 .writers = 1,
1011 .fops = &dvb_demux_fops
1012};
1013
1014
1015static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1016 unsigned int cmd, void *parg)
1017{
0c53c70f
JS		 1018 struct dvb_device *dvbdev = file->private_data;
1019 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 1020
1021 int ret=0;
1022
1023 if (down_interruptible (&dmxdev->mutex))
1024 return -ERESTARTSYS;
1025
1026 switch (cmd) {
1027 case DMX_SET_BUFFER_SIZE:
1028 // FIXME: implement
1029 ret=0;
1030 break;
1031
1032 default:
1033 ret=-EINVAL;
1034 }
1035 up(&dmxdev->mutex);
1036 return ret;
1037}
1038
1039
1040static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1041 unsigned int cmd, unsigned long arg)
1042{
1043 return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1044}
1045
1046
1047static unsigned int dvb_dvr_poll (struct file *file, poll_table *wait)
1048{
0c53c70f
JS		 1049 struct dvb_device *dvbdev = file->private_data;
1050 struct dmxdev *dmxdev = dvbdev->priv;
1da177e4
LT		 1051 unsigned int mask = 0;
1052
1053 dprintk ("function : %s\n", __FUNCTION__);
1054
1055 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1056
1057 if ((file->f_flags&O_ACCMODE) == O_RDONLY) {
1058 if (dmxdev->dvr_buffer.error)
1059 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1060
1061 if (dmxdev->dvr_buffer.pread!=dmxdev->dvr_buffer.pwrite)
1062 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1063 } else
1064 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1065
1066 return mask;
1067}
1068
1069
1070static struct file_operations dvb_dvr_fops = {
1071 .owner = THIS_MODULE,
1072 .read = dvb_dvr_read,
1073 .write = dvb_dvr_write,
1074 .ioctl = dvb_dvr_ioctl,
1075 .open = dvb_dvr_open,
1076 .release = dvb_dvr_release,
1077 .poll = dvb_dvr_poll,
1078};
1079
1080static struct dvb_device dvbdev_dvr = {
1081 .priv = NULL,
1082 .users = 1,
1083 .writers = 1,
1084 .fops = &dvb_dvr_fops
1085};
1086
1087int
1088dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1089{
1090 int i;
1091
1092 if (dmxdev->demux->open(dmxdev->demux) < 0)
1093 return -EUSERS;
1094
1095 dmxdev->filter = vmalloc(dmxdev->filternum*sizeof(struct dmxdev_filter));
1096 if (!dmxdev->filter)
1097 return -ENOMEM;
1098
1099 dmxdev->dvr = vmalloc(dmxdev->filternum*sizeof(struct dmxdev_dvr));
1100 if (!dmxdev->dvr) {
1101 vfree(dmxdev->filter);
1102 dmxdev->filter = NULL;
1103 return -ENOMEM;
1104 }
1105
1106 sema_init(&dmxdev->mutex, 1);
1107 spin_lock_init(&dmxdev->lock);
1108 for (i=0; i<dmxdev->filternum; i++) {
1109 dmxdev->filter[i].dev=dmxdev;
1110 dmxdev->filter[i].buffer.data=NULL;
1111 dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE);
1112 dmxdev->dvr[i].dev=dmxdev;
1113 dmxdev->dvr[i].buffer.data=NULL;
1114 dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE);
1115 dvb_dmxdev_dvr_state_set(&dmxdev->dvr[i], DMXDEV_STATE_FREE);
1116 }
1117
1118 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, DVB_DEVICE_DEMUX);
1119 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, dmxdev, DVB_DEVICE_DVR);
1120
1121 dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
1122
1123 return 0;
1124}
1125EXPORT_SYMBOL(dvb_dmxdev_init);
1126
1127void
1128dvb_dmxdev_release(struct dmxdev *dmxdev)
1129{
1130 dvb_unregister_device(dmxdev->dvbdev);
1131 dvb_unregister_device(dmxdev->dvr_dvbdev);
1132
1133 vfree(dmxdev->filter);
1134 dmxdev->filter=NULL;
1135 vfree(dmxdev->dvr);
1136 dmxdev->dvr=NULL;
1137 dmxdev->demux->close(dmxdev->demux);
1138}
1139EXPORT_SYMBOL(dvb_dmxdev_release);
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