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r8152: fix tx packets accounting
[linux/fpc-iii.git] / drivers / media / dvb-core / dvb_demux.c
bloba0cf7b0d03e868abcb2878fcd027f6cb07253f28
1 /*
2 * dvb_demux.c - DVB kernel demux API
3 *
4 * Copyright (C) 2000-2001 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/sched.h>
25 #include <linux/spinlock.h>
26 #include <linux/slab.h>
27 #include <linux/vmalloc.h>
28 #include <linux/module.h>
29 #include <linux/poll.h>
30 #include <linux/string.h>
31 #include <linux/crc32.h>
32 #include <asm/uaccess.h>
33 #include <asm/div64.h>
34
35 #include "dvb_demux.h"
36
37 #define NOBUFS
38 /*
39 ** #define DVB_DEMUX_SECTION_LOSS_LOG to monitor payload loss in the syslog
40 */
41 // #define DVB_DEMUX_SECTION_LOSS_LOG
42
43 static int dvb_demux_tscheck;
44 module_param(dvb_demux_tscheck, int, 0644);
45 MODULE_PARM_DESC(dvb_demux_tscheck,
46 "enable transport stream continuity and TEI check");
47
48 static int dvb_demux_speedcheck;
49 module_param(dvb_demux_speedcheck, int, 0644);
50 MODULE_PARM_DESC(dvb_demux_speedcheck,
51 "enable transport stream speed check");
52
53 static int dvb_demux_feed_err_pkts = 1;
54 module_param(dvb_demux_feed_err_pkts, int, 0644);
55 MODULE_PARM_DESC(dvb_demux_feed_err_pkts,
56 "when set to 0, drop packets with the TEI bit set (1 by default)");
57
58 #define dprintk_tscheck(x...) do { \
59 if (dvb_demux_tscheck && printk_ratelimit()) \
60 printk(x); \
61 } while (0)
62
63 /******************************************************************************
64 * static inlined helper functions
65 ******************************************************************************/
66
67 static inline u16 section_length(const u8 *buf)
68 {
69 return 3 + ((buf[1] & 0x0f) << 8) + buf[2];
70 }
71
72 static inline u16 ts_pid(const u8 *buf)
73 {
74 return ((buf[1] & 0x1f) << 8) + buf[2];
75 }
76
77 static inline u8 payload(const u8 *tsp)
78 {
79 if (!(tsp[3] & 0x10)) // no payload?
80 return 0;
81
82 if (tsp[3] & 0x20) { // adaptation field?
83 if (tsp[4] > 183) // corrupted data?
84 return 0;
85 else
86 return 184 - 1 - tsp[4];
87 }
88
89 return 184;
90 }
91
92 static u32 dvb_dmx_crc32(struct dvb_demux_feed *f, const u8 *src, size_t len)
93 {
94 return (f->feed.sec.crc_val = crc32_be(f->feed.sec.crc_val, src, len));
95 }
96
97 static void dvb_dmx_memcopy(struct dvb_demux_feed *f, u8 *d, const u8 *s,
98 size_t len)
99 {
100 memcpy(d, s, len);
101 }
102
103 /******************************************************************************
104 * Software filter functions
105 ******************************************************************************/
106
107 static inline int dvb_dmx_swfilter_payload(struct dvb_demux_feed *feed,
108 const u8 *buf)
109 {
110 int count = payload(buf);
111 int p;
112 //int ccok;
113 //u8 cc;
114
115 if (count == 0)
116 return -1;
117
118 p = 188 - count;
119
120 /*
121 cc = buf[3] & 0x0f;
122 ccok = ((feed->cc + 1) & 0x0f) == cc;
123 feed->cc = cc;
124 if (!ccok)
125 printk("missed packet!\n");
126 */
127
128 if (buf[1] & 0x40) // PUSI ?
129 feed->peslen = 0xfffa;
130
131 feed->peslen += count;
132
133 return feed->cb.ts(&buf[p], count, NULL, 0, &feed->feed.ts);
134 }
135
136 static int dvb_dmx_swfilter_sectionfilter(struct dvb_demux_feed *feed,
137 struct dvb_demux_filter *f)
138 {
139 u8 neq = 0;
140 int i;
141
142 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
143 u8 xor = f->filter.filter_value[i] ^ feed->feed.sec.secbuf[i];
144
145 if (f->maskandmode[i] & xor)
146 return 0;
147
148 neq |= f->maskandnotmode[i] & xor;
149 }
150
151 if (f->doneq && !neq)
152 return 0;
153
154 return feed->cb.sec(feed->feed.sec.secbuf, feed->feed.sec.seclen,
155 NULL, 0, &f->filter);
156 }
157
158 static inline int dvb_dmx_swfilter_section_feed(struct dvb_demux_feed *feed)
159 {
160 struct dvb_demux *demux = feed->demux;
161 struct dvb_demux_filter *f = feed->filter;
162 struct dmx_section_feed *sec = &feed->feed.sec;
163 int section_syntax_indicator;
164
165 if (!sec->is_filtering)
166 return 0;
167
168 if (!f)
169 return 0;
170
171 if (sec->check_crc) {
172 section_syntax_indicator = ((sec->secbuf[1] & 0x80) != 0);
173 if (section_syntax_indicator &&
174 demux->check_crc32(feed, sec->secbuf, sec->seclen))
175 return -1;
176 }
177
178 do {
179 if (dvb_dmx_swfilter_sectionfilter(feed, f) < 0)
180 return -1;
181 } while ((f = f->next) && sec->is_filtering);
182
183 sec->seclen = 0;
184
185 return 0;
186 }
187
188 static void dvb_dmx_swfilter_section_new(struct dvb_demux_feed *feed)
189 {
190 struct dmx_section_feed *sec = &feed->feed.sec;
191
192 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
193 if (sec->secbufp < sec->tsfeedp) {
194 int i, n = sec->tsfeedp - sec->secbufp;
195
196 /*
197 * Section padding is done with 0xff bytes entirely.
198 * Due to speed reasons, we won't check all of them
199 * but just first and last.
200 */
201 if (sec->secbuf[0] != 0xff || sec->secbuf[n - 1] != 0xff) {
202 printk("dvb_demux.c section ts padding loss: %d/%d\n",
203 n, sec->tsfeedp);
204 printk("dvb_demux.c pad data:");
205 for (i = 0; i < n; i++)
206 printk(" %02x", sec->secbuf[i]);
207 printk("\n");
208 }
209 }
210 #endif
211
212 sec->tsfeedp = sec->secbufp = sec->seclen = 0;
213 sec->secbuf = sec->secbuf_base;
214 }
215
216 /*
217 * Losless Section Demux 1.4.1 by Emard
218 * Valsecchi Patrick:
219 * - middle of section A (no PUSI)
220 * - end of section A and start of section B
221 * (with PUSI pointing to the start of the second section)
222 *
223 * In this case, without feed->pusi_seen you'll receive a garbage section
224 * consisting of the end of section A. Basically because tsfeedp
225 * is incemented and the use=0 condition is not raised
226 * when the second packet arrives.
227 *
228 * Fix:
229 * when demux is started, let feed->pusi_seen = 0 to
230 * prevent initial feeding of garbage from the end of
231 * previous section. When you for the first time see PUSI=1
232 * then set feed->pusi_seen = 1
233 */
234 static int dvb_dmx_swfilter_section_copy_dump(struct dvb_demux_feed *feed,
235 const u8 *buf, u8 len)
236 {
237 struct dvb_demux *demux = feed->demux;
238 struct dmx_section_feed *sec = &feed->feed.sec;
239 u16 limit, seclen, n;
240
241 if (sec->tsfeedp >= DMX_MAX_SECFEED_SIZE)
242 return 0;
243
244 if (sec->tsfeedp + len > DMX_MAX_SECFEED_SIZE) {
245 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
246 printk("dvb_demux.c section buffer full loss: %d/%d\n",
247 sec->tsfeedp + len - DMX_MAX_SECFEED_SIZE,
248 DMX_MAX_SECFEED_SIZE);
249 #endif
250 len = DMX_MAX_SECFEED_SIZE - sec->tsfeedp;
251 }
252
253 if (len <= 0)
254 return 0;
255
256 demux->memcopy(feed, sec->secbuf_base + sec->tsfeedp, buf, len);
257 sec->tsfeedp += len;
258
259 /*
260 * Dump all the sections we can find in the data (Emard)
261 */
262 limit = sec->tsfeedp;
263 if (limit > DMX_MAX_SECFEED_SIZE)
264 return -1; /* internal error should never happen */
265
266 /* to be sure always set secbuf */
267 sec->secbuf = sec->secbuf_base + sec->secbufp;
268
269 for (n = 0; sec->secbufp + 2 < limit; n++) {
270 seclen = section_length(sec->secbuf);
271 if (seclen <= 0 || seclen > DMX_MAX_SECTION_SIZE
272 || seclen + sec->secbufp > limit)
273 return 0;
274 sec->seclen = seclen;
275 sec->crc_val = ~0;
276 /* dump [secbuf .. secbuf+seclen) */
277 if (feed->pusi_seen)
278 dvb_dmx_swfilter_section_feed(feed);
279 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
280 else
281 printk("dvb_demux.c pusi not seen, discarding section data\n");
282 #endif
283 sec->secbufp += seclen; /* secbufp and secbuf moving together is */
284 sec->secbuf += seclen; /* redundant but saves pointer arithmetic */
285 }
286
287 return 0;
288 }
289
290 static int dvb_dmx_swfilter_section_packet(struct dvb_demux_feed *feed,
291 const u8 *buf)
292 {
293 u8 p, count;
294 int ccok, dc_i = 0;
295 u8 cc;
296
297 count = payload(buf);
298
299 if (count == 0) /* count == 0 if no payload or out of range */
300 return -1;
301
302 p = 188 - count; /* payload start */
303
304 cc = buf[3] & 0x0f;
305 ccok = ((feed->cc + 1) & 0x0f) == cc;
306 feed->cc = cc;
307
308 if (buf[3] & 0x20) {
309 /* adaption field present, check for discontinuity_indicator */
310 if ((buf[4] > 0) && (buf[5] & 0x80))
311 dc_i = 1;
312 }
313
314 if (!ccok || dc_i) {
315 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
316 printk("dvb_demux.c discontinuity detected %d bytes lost\n",
317 count);
318 /*
319 * those bytes under sume circumstances will again be reported
320 * in the following dvb_dmx_swfilter_section_new
321 */
322 #endif
323 /*
324 * Discontinuity detected. Reset pusi_seen = 0 to
325 * stop feeding of suspicious data until next PUSI=1 arrives
326 */
327 feed->pusi_seen = 0;
328 dvb_dmx_swfilter_section_new(feed);
329 }
330
331 if (buf[1] & 0x40) {
332 /* PUSI=1 (is set), section boundary is here */
333 if (count > 1 && buf[p] < count) {
334 const u8 *before = &buf[p + 1];
335 u8 before_len = buf[p];
336 const u8 *after = &before[before_len];
337 u8 after_len = count - 1 - before_len;
338
339 dvb_dmx_swfilter_section_copy_dump(feed, before,
340 before_len);
341 /* before start of new section, set pusi_seen = 1 */
342 feed->pusi_seen = 1;
343 dvb_dmx_swfilter_section_new(feed);
344 dvb_dmx_swfilter_section_copy_dump(feed, after,
345 after_len);
346 }
347 #ifdef DVB_DEMUX_SECTION_LOSS_LOG
348 else if (count > 0)
349 printk("dvb_demux.c PUSI=1 but %d bytes lost\n", count);
350 #endif
351 } else {
352 /* PUSI=0 (is not set), no section boundary */
353 dvb_dmx_swfilter_section_copy_dump(feed, &buf[p], count);
354 }
355
356 return 0;
357 }
358
359 static inline void dvb_dmx_swfilter_packet_type(struct dvb_demux_feed *feed,
360 const u8 *buf)
361 {
362 switch (feed->type) {
363 case DMX_TYPE_TS:
364 if (!feed->feed.ts.is_filtering)
365 break;
366 if (feed->ts_type & TS_PACKET) {
367 if (feed->ts_type & TS_PAYLOAD_ONLY)
368 dvb_dmx_swfilter_payload(feed, buf);
369 else
370 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
371 }
372 if (feed->ts_type & TS_DECODER)
373 if (feed->demux->write_to_decoder)
374 feed->demux->write_to_decoder(feed, buf, 188);
375 break;
376
377 case DMX_TYPE_SEC:
378 if (!feed->feed.sec.is_filtering)
379 break;
380 if (dvb_dmx_swfilter_section_packet(feed, buf) < 0)
381 feed->feed.sec.seclen = feed->feed.sec.secbufp = 0;
382 break;
383
384 default:
385 break;
386 }
387 }
388
389 #define DVR_FEED(f) \
390 (((f)->type == DMX_TYPE_TS) && \
391 ((f)->feed.ts.is_filtering) && \
392 (((f)->ts_type & (TS_PACKET | TS_DEMUX)) == TS_PACKET))
393
394 static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
395 {
396 struct dvb_demux_feed *feed;
397 u16 pid = ts_pid(buf);
398 int dvr_done = 0;
399
400 if (dvb_demux_speedcheck) {
401 ktime_t cur_time;
402 u64 speed_bytes, speed_timedelta;
403
404 demux->speed_pkts_cnt++;
405
406 /* show speed every SPEED_PKTS_INTERVAL packets */
407 if (!(demux->speed_pkts_cnt % SPEED_PKTS_INTERVAL)) {
408 cur_time = ktime_get();
409
410 if (ktime_to_ns(demux->speed_last_time) != 0) {
411 speed_bytes = (u64)demux->speed_pkts_cnt
412 * 188 * 8;
413 /* convert to 1024 basis */
414 speed_bytes = 1000 * div64_u64(speed_bytes,
415 1024);
416 speed_timedelta = ktime_ms_delta(cur_time,
417 demux->speed_last_time);
418 printk(KERN_INFO "TS speed %llu Kbits/sec \n",
419 div64_u64(speed_bytes,
420 speed_timedelta));
421 }
422
423 demux->speed_last_time = cur_time;
424 demux->speed_pkts_cnt = 0;
425 }
426 }
427
428 if (buf[1] & 0x80) {
429 dprintk_tscheck("TEI detected. "
430 "PID=0x%x data1=0x%x\n",
431 pid, buf[1]);
432 /* data in this packet can't be trusted - drop it unless
433 * module option dvb_demux_feed_err_pkts is set */
434 if (!dvb_demux_feed_err_pkts)
435 return;
436 } else /* if TEI bit is set, pid may be wrong- skip pkt counter */
437 if (demux->cnt_storage && dvb_demux_tscheck) {
438 /* check pkt counter */
439 if (pid < MAX_PID) {
440 if (buf[3] & 0x10)
441 demux->cnt_storage[pid] =
442 (demux->cnt_storage[pid] + 1) & 0xf;
443
444 if ((buf[3] & 0xf) != demux->cnt_storage[pid]) {
445 dprintk_tscheck("TS packet counter mismatch. PID=0x%x expected 0x%x got 0x%x\n",
446 pid, demux->cnt_storage[pid],
447 buf[3] & 0xf);
448 demux->cnt_storage[pid] = buf[3] & 0xf;
449 }
450 }
451 /* end check */
452 }
453
454 list_for_each_entry(feed, &demux->feed_list, list_head) {
455 if ((feed->pid != pid) && (feed->pid != 0x2000))
456 continue;
457
458 /* copy each packet only once to the dvr device, even
459 * if a PID is in multiple filters (e.g. video + PCR) */
460 if ((DVR_FEED(feed)) && (dvr_done++))
461 continue;
462
463 if (feed->pid == pid)
464 dvb_dmx_swfilter_packet_type(feed, buf);
465 else if (feed->pid == 0x2000)
466 feed->cb.ts(buf, 188, NULL, 0, &feed->feed.ts);
467 }
468 }
469
470 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
471 size_t count)
472 {
473 unsigned long flags;
474
475 spin_lock_irqsave(&demux->lock, flags);
476
477 while (count--) {
478 if (buf[0] == 0x47)
479 dvb_dmx_swfilter_packet(demux, buf);
480 buf += 188;
481 }
482
483 spin_unlock_irqrestore(&demux->lock, flags);
484 }
485
486 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
487
488 static inline int find_next_packet(const u8 *buf, int pos, size_t count,
489 const int pktsize)
490 {
491 int start = pos, lost;
492
493 while (pos < count) {
494 if (buf[pos] == 0x47 ||
495 (pktsize == 204 && buf[pos] == 0xB8))
496 break;
497 pos++;
498 }
499
500 lost = pos - start;
501 if (lost) {
502 /* This garbage is part of a valid packet? */
503 int backtrack = pos - pktsize;
504 if (backtrack >= 0 && (buf[backtrack] == 0x47 ||
505 (pktsize == 204 && buf[backtrack] == 0xB8)))
506 return backtrack;
507 }
508
509 return pos;
510 }
511
512 /* Filter all pktsize= 188 or 204 sized packets and skip garbage. */
513 static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
514 size_t count, const int pktsize)
515 {
516 int p = 0, i, j;
517 const u8 *q;
518 unsigned long flags;
519
520 spin_lock_irqsave(&demux->lock, flags);
521
522 if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
523 i = demux->tsbufp;
524 j = pktsize - i;
525 if (count < j) {
526 memcpy(&demux->tsbuf[i], buf, count);
527 demux->tsbufp += count;
528 goto bailout;
529 }
530 memcpy(&demux->tsbuf[i], buf, j);
531 if (demux->tsbuf[0] == 0x47) /* double check */
532 dvb_dmx_swfilter_packet(demux, demux->tsbuf);
533 demux->tsbufp = 0;
534 p += j;
535 }
536
537 while (1) {
538 p = find_next_packet(buf, p, count, pktsize);
539 if (p >= count)
540 break;
541 if (count - p < pktsize)
542 break;
543
544 q = &buf[p];
545
546 if (pktsize == 204 && (*q == 0xB8)) {
547 memcpy(demux->tsbuf, q, 188);
548 demux->tsbuf[0] = 0x47;
549 q = demux->tsbuf;
550 }
551 dvb_dmx_swfilter_packet(demux, q);
552 p += pktsize;
553 }
554
555 i = count - p;
556 if (i) {
557 memcpy(demux->tsbuf, &buf[p], i);
558 demux->tsbufp = i;
559 if (pktsize == 204 && demux->tsbuf[0] == 0xB8)
560 demux->tsbuf[0] = 0x47;
561 }
562
563 bailout:
564 spin_unlock_irqrestore(&demux->lock, flags);
565 }
566
567 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
568 {
569 _dvb_dmx_swfilter(demux, buf, count, 188);
570 }
571 EXPORT_SYMBOL(dvb_dmx_swfilter);
572
573 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, size_t count)
574 {
575 _dvb_dmx_swfilter(demux, buf, count, 204);
576 }
577 EXPORT_SYMBOL(dvb_dmx_swfilter_204);
578
579 void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count)
580 {
581 unsigned long flags;
582
583 spin_lock_irqsave(&demux->lock, flags);
584
585 demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts);
586
587 spin_unlock_irqrestore(&demux->lock, flags);
588 }
589 EXPORT_SYMBOL(dvb_dmx_swfilter_raw);
590
591 static struct dvb_demux_filter *dvb_dmx_filter_alloc(struct dvb_demux *demux)
592 {
593 int i;
594
595 for (i = 0; i < demux->filternum; i++)
596 if (demux->filter[i].state == DMX_STATE_FREE)
597 break;
598
599 if (i == demux->filternum)
600 return NULL;
601
602 demux->filter[i].state = DMX_STATE_ALLOCATED;
603
604 return &demux->filter[i];
605 }
606
607 static struct dvb_demux_feed *dvb_dmx_feed_alloc(struct dvb_demux *demux)
608 {
609 int i;
610
611 for (i = 0; i < demux->feednum; i++)
612 if (demux->feed[i].state == DMX_STATE_FREE)
613 break;
614
615 if (i == demux->feednum)
616 return NULL;
617
618 demux->feed[i].state = DMX_STATE_ALLOCATED;
619
620 return &demux->feed[i];
621 }
622
623 static int dvb_demux_feed_find(struct dvb_demux_feed *feed)
624 {
625 struct dvb_demux_feed *entry;
626
627 list_for_each_entry(entry, &feed->demux->feed_list, list_head)
628 if (entry == feed)
629 return 1;
630
631 return 0;
632 }
633
634 static void dvb_demux_feed_add(struct dvb_demux_feed *feed)
635 {
636 spin_lock_irq(&feed->demux->lock);
637 if (dvb_demux_feed_find(feed)) {
638 printk(KERN_ERR "%s: feed already in list (type=%x state=%x pid=%x)\n",
639 __func__, feed->type, feed->state, feed->pid);
640 goto out;
641 }
642
643 list_add(&feed->list_head, &feed->demux->feed_list);
644 out:
645 spin_unlock_irq(&feed->demux->lock);
646 }
647
648 static void dvb_demux_feed_del(struct dvb_demux_feed *feed)
649 {
650 spin_lock_irq(&feed->demux->lock);
651 if (!(dvb_demux_feed_find(feed))) {
652 printk(KERN_ERR "%s: feed not in list (type=%x state=%x pid=%x)\n",
653 __func__, feed->type, feed->state, feed->pid);
654 goto out;
655 }
656
657 list_del(&feed->list_head);
658 out:
659 spin_unlock_irq(&feed->demux->lock);
660 }
661
662 static int dmx_ts_feed_set(struct dmx_ts_feed *ts_feed, u16 pid, int ts_type,
663 enum dmx_ts_pes pes_type,
664 size_t circular_buffer_size, ktime_t timeout)
665 {
666 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
667 struct dvb_demux *demux = feed->demux;
668
669 if (pid > DMX_MAX_PID)
670 return -EINVAL;
671
672 if (mutex_lock_interruptible(&demux->mutex))
673 return -ERESTARTSYS;
674
675 if (ts_type & TS_DECODER) {
676 if (pes_type >= DMX_PES_OTHER) {
677 mutex_unlock(&demux->mutex);
678 return -EINVAL;
679 }
680
681 if (demux->pesfilter[pes_type] &&
682 demux->pesfilter[pes_type] != feed) {
683 mutex_unlock(&demux->mutex);
684 return -EINVAL;
685 }
686
687 demux->pesfilter[pes_type] = feed;
688 demux->pids[pes_type] = pid;
689 }
690
691 dvb_demux_feed_add(feed);
692
693 feed->pid = pid;
694 feed->buffer_size = circular_buffer_size;
695 feed->timeout = timeout;
696 feed->ts_type = ts_type;
697 feed->pes_type = pes_type;
698
699 if (feed->buffer_size) {
700 #ifdef NOBUFS
701 feed->buffer = NULL;
702 #else
703 feed->buffer = vmalloc(feed->buffer_size);
704 if (!feed->buffer) {
705 mutex_unlock(&demux->mutex);
706 return -ENOMEM;
707 }
708 #endif
709 }
710
711 feed->state = DMX_STATE_READY;
712 mutex_unlock(&demux->mutex);
713
714 return 0;
715 }
716
717 static int dmx_ts_feed_start_filtering(struct dmx_ts_feed *ts_feed)
718 {
719 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
720 struct dvb_demux *demux = feed->demux;
721 int ret;
722
723 if (mutex_lock_interruptible(&demux->mutex))
724 return -ERESTARTSYS;
725
726 if (feed->state != DMX_STATE_READY || feed->type != DMX_TYPE_TS) {
727 mutex_unlock(&demux->mutex);
728 return -EINVAL;
729 }
730
731 if (!demux->start_feed) {
732 mutex_unlock(&demux->mutex);
733 return -ENODEV;
734 }
735
736 if ((ret = demux->start_feed(feed)) < 0) {
737 mutex_unlock(&demux->mutex);
738 return ret;
739 }
740
741 spin_lock_irq(&demux->lock);
742 ts_feed->is_filtering = 1;
743 feed->state = DMX_STATE_GO;
744 spin_unlock_irq(&demux->lock);
745 mutex_unlock(&demux->mutex);
746
747 return 0;
748 }
749
750 static int dmx_ts_feed_stop_filtering(struct dmx_ts_feed *ts_feed)
751 {
752 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
753 struct dvb_demux *demux = feed->demux;
754 int ret;
755
756 mutex_lock(&demux->mutex);
757
758 if (feed->state < DMX_STATE_GO) {
759 mutex_unlock(&demux->mutex);
760 return -EINVAL;
761 }
762
763 if (!demux->stop_feed) {
764 mutex_unlock(&demux->mutex);
765 return -ENODEV;
766 }
767
768 ret = demux->stop_feed(feed);
769
770 spin_lock_irq(&demux->lock);
771 ts_feed->is_filtering = 0;
772 feed->state = DMX_STATE_ALLOCATED;
773 spin_unlock_irq(&demux->lock);
774 mutex_unlock(&demux->mutex);
775
776 return ret;
777 }
778
779 static int dvbdmx_allocate_ts_feed(struct dmx_demux *dmx,
780 struct dmx_ts_feed **ts_feed,
781 dmx_ts_cb callback)
782 {
783 struct dvb_demux *demux = (struct dvb_demux *)dmx;
784 struct dvb_demux_feed *feed;
785
786 if (mutex_lock_interruptible(&demux->mutex))
787 return -ERESTARTSYS;
788
789 if (!(feed = dvb_dmx_feed_alloc(demux))) {
790 mutex_unlock(&demux->mutex);
791 return -EBUSY;
792 }
793
794 feed->type = DMX_TYPE_TS;
795 feed->cb.ts = callback;
796 feed->demux = demux;
797 feed->pid = 0xffff;
798 feed->peslen = 0xfffa;
799 feed->buffer = NULL;
800
801 (*ts_feed) = &feed->feed.ts;
802 (*ts_feed)->parent = dmx;
803 (*ts_feed)->priv = NULL;
804 (*ts_feed)->is_filtering = 0;
805 (*ts_feed)->start_filtering = dmx_ts_feed_start_filtering;
806 (*ts_feed)->stop_filtering = dmx_ts_feed_stop_filtering;
807 (*ts_feed)->set = dmx_ts_feed_set;
808
809 if (!(feed->filter = dvb_dmx_filter_alloc(demux))) {
810 feed->state = DMX_STATE_FREE;
811 mutex_unlock(&demux->mutex);
812 return -EBUSY;
813 }
814
815 feed->filter->type = DMX_TYPE_TS;
816 feed->filter->feed = feed;
817 feed->filter->state = DMX_STATE_READY;
818
819 mutex_unlock(&demux->mutex);
820
821 return 0;
822 }
823
824 static int dvbdmx_release_ts_feed(struct dmx_demux *dmx,
825 struct dmx_ts_feed *ts_feed)
826 {
827 struct dvb_demux *demux = (struct dvb_demux *)dmx;
828 struct dvb_demux_feed *feed = (struct dvb_demux_feed *)ts_feed;
829
830 mutex_lock(&demux->mutex);
831
832 if (feed->state == DMX_STATE_FREE) {
833 mutex_unlock(&demux->mutex);
834 return -EINVAL;
835 }
836 #ifndef NOBUFS
837 vfree(feed->buffer);
838 feed->buffer = NULL;
839 #endif
840
841 feed->state = DMX_STATE_FREE;
842 feed->filter->state = DMX_STATE_FREE;
843
844 dvb_demux_feed_del(feed);
845
846 feed->pid = 0xffff;
847
848 if (feed->ts_type & TS_DECODER && feed->pes_type < DMX_PES_OTHER)
849 demux->pesfilter[feed->pes_type] = NULL;
850
851 mutex_unlock(&demux->mutex);
852 return 0;
853 }
854
855 /******************************************************************************
856 * dmx_section_feed API calls
857 ******************************************************************************/
858
859 static int dmx_section_feed_allocate_filter(struct dmx_section_feed *feed,
860 struct dmx_section_filter **filter)
861 {
862 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
863 struct dvb_demux *dvbdemux = dvbdmxfeed->demux;
864 struct dvb_demux_filter *dvbdmxfilter;
865
866 if (mutex_lock_interruptible(&dvbdemux->mutex))
867 return -ERESTARTSYS;
868
869 dvbdmxfilter = dvb_dmx_filter_alloc(dvbdemux);
870 if (!dvbdmxfilter) {
871 mutex_unlock(&dvbdemux->mutex);
872 return -EBUSY;
873 }
874
875 spin_lock_irq(&dvbdemux->lock);
876 *filter = &dvbdmxfilter->filter;
877 (*filter)->parent = feed;
878 (*filter)->priv = NULL;
879 dvbdmxfilter->feed = dvbdmxfeed;
880 dvbdmxfilter->type = DMX_TYPE_SEC;
881 dvbdmxfilter->state = DMX_STATE_READY;
882 dvbdmxfilter->next = dvbdmxfeed->filter;
883 dvbdmxfeed->filter = dvbdmxfilter;
884 spin_unlock_irq(&dvbdemux->lock);
885
886 mutex_unlock(&dvbdemux->mutex);
887 return 0;
888 }
889
890 static int dmx_section_feed_set(struct dmx_section_feed *feed,
891 u16 pid, size_t circular_buffer_size,
892 int check_crc)
893 {
894 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
895 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
896
897 if (pid > 0x1fff)
898 return -EINVAL;
899
900 if (mutex_lock_interruptible(&dvbdmx->mutex))
901 return -ERESTARTSYS;
902
903 dvb_demux_feed_add(dvbdmxfeed);
904
905 dvbdmxfeed->pid = pid;
906 dvbdmxfeed->buffer_size = circular_buffer_size;
907 dvbdmxfeed->feed.sec.check_crc = check_crc;
908
909 #ifdef NOBUFS
910 dvbdmxfeed->buffer = NULL;
911 #else
912 dvbdmxfeed->buffer = vmalloc(dvbdmxfeed->buffer_size);
913 if (!dvbdmxfeed->buffer) {
914 mutex_unlock(&dvbdmx->mutex);
915 return -ENOMEM;
916 }
917 #endif
918
919 dvbdmxfeed->state = DMX_STATE_READY;
920 mutex_unlock(&dvbdmx->mutex);
921 return 0;
922 }
923
924 static void prepare_secfilters(struct dvb_demux_feed *dvbdmxfeed)
925 {
926 int i;
927 struct dvb_demux_filter *f;
928 struct dmx_section_filter *sf;
929 u8 mask, mode, doneq;
930
931 if (!(f = dvbdmxfeed->filter))
932 return;
933 do {
934 sf = &f->filter;
935 doneq = 0;
936 for (i = 0; i < DVB_DEMUX_MASK_MAX; i++) {
937 mode = sf->filter_mode[i];
938 mask = sf->filter_mask[i];
939 f->maskandmode[i] = mask & mode;
940 doneq |= f->maskandnotmode[i] = mask & ~mode;
941 }
942 f->doneq = doneq ? 1 : 0;
943 } while ((f = f->next));
944 }
945
946 static int dmx_section_feed_start_filtering(struct dmx_section_feed *feed)
947 {
948 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
949 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
950 int ret;
951
952 if (mutex_lock_interruptible(&dvbdmx->mutex))
953 return -ERESTARTSYS;
954
955 if (feed->is_filtering) {
956 mutex_unlock(&dvbdmx->mutex);
957 return -EBUSY;
958 }
959
960 if (!dvbdmxfeed->filter) {
961 mutex_unlock(&dvbdmx->mutex);
962 return -EINVAL;
963 }
964
965 dvbdmxfeed->feed.sec.tsfeedp = 0;
966 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
967 dvbdmxfeed->feed.sec.secbufp = 0;
968 dvbdmxfeed->feed.sec.seclen = 0;
969
970 if (!dvbdmx->start_feed) {
971 mutex_unlock(&dvbdmx->mutex);
972 return -ENODEV;
973 }
974
975 prepare_secfilters(dvbdmxfeed);
976
977 if ((ret = dvbdmx->start_feed(dvbdmxfeed)) < 0) {
978 mutex_unlock(&dvbdmx->mutex);
979 return ret;
980 }
981
982 spin_lock_irq(&dvbdmx->lock);
983 feed->is_filtering = 1;
984 dvbdmxfeed->state = DMX_STATE_GO;
985 spin_unlock_irq(&dvbdmx->lock);
986
987 mutex_unlock(&dvbdmx->mutex);
988 return 0;
989 }
990
991 static int dmx_section_feed_stop_filtering(struct dmx_section_feed *feed)
992 {
993 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
994 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
995 int ret;
996
997 mutex_lock(&dvbdmx->mutex);
998
999 if (!dvbdmx->stop_feed) {
1000 mutex_unlock(&dvbdmx->mutex);
1001 return -ENODEV;
1002 }
1003
1004 ret = dvbdmx->stop_feed(dvbdmxfeed);
1005
1006 spin_lock_irq(&dvbdmx->lock);
1007 dvbdmxfeed->state = DMX_STATE_READY;
1008 feed->is_filtering = 0;
1009 spin_unlock_irq(&dvbdmx->lock);
1010
1011 mutex_unlock(&dvbdmx->mutex);
1012 return ret;
1013 }
1014
1015 static int dmx_section_feed_release_filter(struct dmx_section_feed *feed,
1016 struct dmx_section_filter *filter)
1017 {
1018 struct dvb_demux_filter *dvbdmxfilter = (struct dvb_demux_filter *)filter, *f;
1019 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1020 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
1021
1022 mutex_lock(&dvbdmx->mutex);
1023
1024 if (dvbdmxfilter->feed != dvbdmxfeed) {
1025 mutex_unlock(&dvbdmx->mutex);
1026 return -EINVAL;
1027 }
1028
1029 if (feed->is_filtering) {
1030 /* release dvbdmx->mutex as far as it is
1031 acquired by stop_filtering() itself */
1032 mutex_unlock(&dvbdmx->mutex);
1033 feed->stop_filtering(feed);
1034 mutex_lock(&dvbdmx->mutex);
1035 }
1036
1037 spin_lock_irq(&dvbdmx->lock);
1038 f = dvbdmxfeed->filter;
1039
1040 if (f == dvbdmxfilter) {
1041 dvbdmxfeed->filter = dvbdmxfilter->next;
1042 } else {
1043 while (f->next != dvbdmxfilter)
1044 f = f->next;
1045 f->next = f->next->next;
1046 }
1047
1048 dvbdmxfilter->state = DMX_STATE_FREE;
1049 spin_unlock_irq(&dvbdmx->lock);
1050 mutex_unlock(&dvbdmx->mutex);
1051 return 0;
1052 }
1053
1054 static int dvbdmx_allocate_section_feed(struct dmx_demux *demux,
1055 struct dmx_section_feed **feed,
1056 dmx_section_cb callback)
1057 {
1058 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1059 struct dvb_demux_feed *dvbdmxfeed;
1060
1061 if (mutex_lock_interruptible(&dvbdmx->mutex))
1062 return -ERESTARTSYS;
1063
1064 if (!(dvbdmxfeed = dvb_dmx_feed_alloc(dvbdmx))) {
1065 mutex_unlock(&dvbdmx->mutex);
1066 return -EBUSY;
1067 }
1068
1069 dvbdmxfeed->type = DMX_TYPE_SEC;
1070 dvbdmxfeed->cb.sec = callback;
1071 dvbdmxfeed->demux = dvbdmx;
1072 dvbdmxfeed->pid = 0xffff;
1073 dvbdmxfeed->feed.sec.secbuf = dvbdmxfeed->feed.sec.secbuf_base;
1074 dvbdmxfeed->feed.sec.secbufp = dvbdmxfeed->feed.sec.seclen = 0;
1075 dvbdmxfeed->feed.sec.tsfeedp = 0;
1076 dvbdmxfeed->filter = NULL;
1077 dvbdmxfeed->buffer = NULL;
1078
1079 (*feed) = &dvbdmxfeed->feed.sec;
1080 (*feed)->is_filtering = 0;
1081 (*feed)->parent = demux;
1082 (*feed)->priv = NULL;
1083
1084 (*feed)->set = dmx_section_feed_set;
1085 (*feed)->allocate_filter = dmx_section_feed_allocate_filter;
1086 (*feed)->start_filtering = dmx_section_feed_start_filtering;
1087 (*feed)->stop_filtering = dmx_section_feed_stop_filtering;
1088 (*feed)->release_filter = dmx_section_feed_release_filter;
1089
1090 mutex_unlock(&dvbdmx->mutex);
1091 return 0;
1092 }
1093
1094 static int dvbdmx_release_section_feed(struct dmx_demux *demux,
1095 struct dmx_section_feed *feed)
1096 {
1097 struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *)feed;
1098 struct dvb_demux *dvbdmx = (struct dvb_demux *)demux;
1099
1100 mutex_lock(&dvbdmx->mutex);
1101
1102 if (dvbdmxfeed->state == DMX_STATE_FREE) {
1103 mutex_unlock(&dvbdmx->mutex);
1104 return -EINVAL;
1105 }
1106 #ifndef NOBUFS
1107 vfree(dvbdmxfeed->buffer);
1108 dvbdmxfeed->buffer = NULL;
1109 #endif
1110 dvbdmxfeed->state = DMX_STATE_FREE;
1111
1112 dvb_demux_feed_del(dvbdmxfeed);
1113
1114 dvbdmxfeed->pid = 0xffff;
1115
1116 mutex_unlock(&dvbdmx->mutex);
1117 return 0;
1118 }
1119
1120 /******************************************************************************
1121 * dvb_demux kernel data API calls
1122 ******************************************************************************/
1123
1124 static int dvbdmx_open(struct dmx_demux *demux)
1125 {
1126 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1127
1128 if (dvbdemux->users >= MAX_DVB_DEMUX_USERS)
1129 return -EUSERS;
1130
1131 dvbdemux->users++;
1132 return 0;
1133 }
1134
1135 static int dvbdmx_close(struct dmx_demux *demux)
1136 {
1137 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1138
1139 if (dvbdemux->users == 0)
1140 return -ENODEV;
1141
1142 dvbdemux->users--;
1143 //FIXME: release any unneeded resources if users==0
1144 return 0;
1145 }
1146
1147 static int dvbdmx_write(struct dmx_demux *demux, const char __user *buf, size_t count)
1148 {
1149 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1150 void *p;
1151
1152 if ((!demux->frontend) || (demux->frontend->source != DMX_MEMORY_FE))
1153 return -EINVAL;
1154
1155 p = memdup_user(buf, count);
1156 if (IS_ERR(p))
1157 return PTR_ERR(p);
1158 if (mutex_lock_interruptible(&dvbdemux->mutex)) {
1159 kfree(p);
1160 return -ERESTARTSYS;
1161 }
1162 dvb_dmx_swfilter(dvbdemux, p, count);
1163 kfree(p);
1164 mutex_unlock(&dvbdemux->mutex);
1165
1166 if (signal_pending(current))
1167 return -EINTR;
1168 return count;
1169 }
1170
1171 static int dvbdmx_add_frontend(struct dmx_demux *demux,
1172 struct dmx_frontend *frontend)
1173 {
1174 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1175 struct list_head *head = &dvbdemux->frontend_list;
1176
1177 list_add(&(frontend->connectivity_list), head);
1178
1179 return 0;
1180 }
1181
1182 static int dvbdmx_remove_frontend(struct dmx_demux *demux,
1183 struct dmx_frontend *frontend)
1184 {
1185 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1186 struct list_head *pos, *n, *head = &dvbdemux->frontend_list;
1187
1188 list_for_each_safe(pos, n, head) {
1189 if (DMX_FE_ENTRY(pos) == frontend) {
1190 list_del(pos);
1191 return 0;
1192 }
1193 }
1194
1195 return -ENODEV;
1196 }
1197
1198 static struct list_head *dvbdmx_get_frontends(struct dmx_demux *demux)
1199 {
1200 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1201
1202 if (list_empty(&dvbdemux->frontend_list))
1203 return NULL;
1204
1205 return &dvbdemux->frontend_list;
1206 }
1207
1208 static int dvbdmx_connect_frontend(struct dmx_demux *demux,
1209 struct dmx_frontend *frontend)
1210 {
1211 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1212
1213 if (demux->frontend)
1214 return -EINVAL;
1215
1216 mutex_lock(&dvbdemux->mutex);
1217
1218 demux->frontend = frontend;
1219 mutex_unlock(&dvbdemux->mutex);
1220 return 0;
1221 }
1222
1223 static int dvbdmx_disconnect_frontend(struct dmx_demux *demux)
1224 {
1225 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1226
1227 mutex_lock(&dvbdemux->mutex);
1228
1229 demux->frontend = NULL;
1230 mutex_unlock(&dvbdemux->mutex);
1231 return 0;
1232 }
1233
1234 static int dvbdmx_get_pes_pids(struct dmx_demux *demux, u16 * pids)
1235 {
1236 struct dvb_demux *dvbdemux = (struct dvb_demux *)demux;
1237
1238 memcpy(pids, dvbdemux->pids, 5 * sizeof(u16));
1239 return 0;
1240 }
1241
1242 int dvb_dmx_init(struct dvb_demux *dvbdemux)
1243 {
1244 int i;
1245 struct dmx_demux *dmx = &dvbdemux->dmx;
1246
1247 dvbdemux->cnt_storage = NULL;
1248 dvbdemux->users = 0;
1249 dvbdemux->filter = vmalloc(dvbdemux->filternum * sizeof(struct dvb_demux_filter));
1250
1251 if (!dvbdemux->filter)
1252 return -ENOMEM;
1253
1254 dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed));
1255 if (!dvbdemux->feed) {
1256 vfree(dvbdemux->filter);
1257 dvbdemux->filter = NULL;
1258 return -ENOMEM;
1259 }
1260 for (i = 0; i < dvbdemux->filternum; i++) {
1261 dvbdemux->filter[i].state = DMX_STATE_FREE;
1262 dvbdemux->filter[i].index = i;
1263 }
1264 for (i = 0; i < dvbdemux->feednum; i++) {
1265 dvbdemux->feed[i].state = DMX_STATE_FREE;
1266 dvbdemux->feed[i].index = i;
1267 }
1268
1269 dvbdemux->cnt_storage = vmalloc(MAX_PID + 1);
1270 if (!dvbdemux->cnt_storage)
1271 printk(KERN_WARNING "Couldn't allocate memory for TS/TEI check. Disabling it\n");
1272
1273 INIT_LIST_HEAD(&dvbdemux->frontend_list);
1274
1275 for (i = 0; i < DMX_PES_OTHER; i++) {
1276 dvbdemux->pesfilter[i] = NULL;
1277 dvbdemux->pids[i] = 0xffff;
1278 }
1279
1280 INIT_LIST_HEAD(&dvbdemux->feed_list);
1281
1282 dvbdemux->playing = 0;
1283 dvbdemux->recording = 0;
1284 dvbdemux->tsbufp = 0;
1285
1286 if (!dvbdemux->check_crc32)
1287 dvbdemux->check_crc32 = dvb_dmx_crc32;
1288
1289 if (!dvbdemux->memcopy)
1290 dvbdemux->memcopy = dvb_dmx_memcopy;
1291
1292 dmx->frontend = NULL;
1293 dmx->priv = dvbdemux;
1294 dmx->open = dvbdmx_open;
1295 dmx->close = dvbdmx_close;
1296 dmx->write = dvbdmx_write;
1297 dmx->allocate_ts_feed = dvbdmx_allocate_ts_feed;
1298 dmx->release_ts_feed = dvbdmx_release_ts_feed;
1299 dmx->allocate_section_feed = dvbdmx_allocate_section_feed;
1300 dmx->release_section_feed = dvbdmx_release_section_feed;
1301
1302 dmx->add_frontend = dvbdmx_add_frontend;
1303 dmx->remove_frontend = dvbdmx_remove_frontend;
1304 dmx->get_frontends = dvbdmx_get_frontends;
1305 dmx->connect_frontend = dvbdmx_connect_frontend;
1306 dmx->disconnect_frontend = dvbdmx_disconnect_frontend;
1307 dmx->get_pes_pids = dvbdmx_get_pes_pids;
1308
1309 mutex_init(&dvbdemux->mutex);
1310 spin_lock_init(&dvbdemux->lock);
1311
1312 return 0;
1313 }
1314
1315 EXPORT_SYMBOL(dvb_dmx_init);
1316
1317 void dvb_dmx_release(struct dvb_demux *dvbdemux)
1318 {
1319 vfree(dvbdemux->cnt_storage);
1320 vfree(dvbdemux->filter);
1321 vfree(dvbdemux->feed);
1322 }
1323
1324 EXPORT_SYMBOL(dvb_dmx_release);
Linux with added FPC-III support