drivers/media/dvb/dvb-core/dmxdev.c

   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/spinlock.h>
  24 #include <linux/slab.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/module.h>
  27 #include <linux/poll.h>
  28 #include <linux/ioctl.h>
  29 #include <linux/wait.h>
  30 #include <asm/uaccess.h>
  31 #include <asm/system.h>
  32 #include "dmxdev.h"
  33
  34 static int debug;
  35
  36 module_param(debug, int, 0644);
  37 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  38
  39 #define dprintk if (debug) printk
  40
  41 static 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
  60 static 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(src, (u8 *)buf, avail, 1);
 100                 if (ret < 0)
 101                         break;
 102
 103                 buf += ret;
 104         }
 105
 106         return (count - todo) ? (count - todo) : ret;
 107 }
 108
 109 static 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
 123 static 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
 183 static 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                 fops_put(file->f_op);
 210                 file->f_op = NULL;
 211                 mutex_unlock(&dmxdev->mutex);
 212                 wake_up(&dvbdev->wait_queue);
 213         } else
 214                 mutex_unlock(&dmxdev->mutex);
 215
 216         return 0;
 217 }
 218
 219 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 220                              size_t count, loff_t *ppos)
 221 {
 222         struct dvb_device *dvbdev = file->private_data;
 223         struct dmxdev *dmxdev = dvbdev->priv;
 224         int ret;
 225
 226         if (!dmxdev->demux->write)
 227                 return -EOPNOTSUPP;
 228         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 229                 return -EINVAL;
 230         if (mutex_lock_interruptible(&dmxdev->mutex))
 231                 return -ERESTARTSYS;
 232
 233         if (dmxdev->exit) {
 234                 mutex_unlock(&dmxdev->mutex);
 235                 return -ENODEV;
 236         }
 237         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 238         mutex_unlock(&dmxdev->mutex);
 239         return ret;
 240 }
 241
 242 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 243                             loff_t *ppos)
 244 {
 245         struct dvb_device *dvbdev = file->private_data;
 246         struct dmxdev *dmxdev = dvbdev->priv;
 247         int ret;
 248
 249         if (dmxdev->exit) {
 250                 mutex_unlock(&dmxdev->mutex);
 251                 return -ENODEV;
 252         }
 253
 254         //mutex_lock(&dmxdev->mutex);
 255         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 256                                      file->f_flags & O_NONBLOCK,
 257                                      buf, count, ppos);
 258         //mutex_unlock(&dmxdev->mutex);
 259         return ret;
 260 }
 261
 262 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
 263                                       unsigned long size)
 264 {
 265         struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
 266         void *newmem;
 267         void *oldmem;
 268
 269         dprintk("function : %s\n", __func__);
 270
 271         if (buf->size == size)
 272                 return 0;
 273         if (!size)
 274                 return -EINVAL;
 275
 276         newmem = vmalloc(size);
 277         if (!newmem)
 278                 return -ENOMEM;
 279
 280         oldmem = buf->data;
 281
 282         spin_lock_irq(&dmxdev->lock);
 283         buf->data = newmem;
 284         buf->size = size;
 285
 286         /* reset and not flush in case the buffer shrinks */
 287         dvb_ringbuffer_reset(buf);
 288         spin_unlock_irq(&dmxdev->lock);
 289
 290         vfree(oldmem);
 291
 292         return 0;
 293 }
 294
 295 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 296                                                *dmxdevfilter, int state)
 297 {
 298         spin_lock_irq(&dmxdevfilter->dev->lock);
 299         dmxdevfilter->state = state;
 300         spin_unlock_irq(&dmxdevfilter->dev->lock);
 301 }
 302
 303 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 304                                       unsigned long size)
 305 {
 306         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 307         void *newmem;
 308         void *oldmem;
 309
 310         if (buf->size == size)
 311                 return 0;
 312         if (!size)
 313                 return -EINVAL;
 314         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 315                 return -EBUSY;
 316
 317         newmem = vmalloc(size);
 318         if (!newmem)
 319                 return -ENOMEM;
 320
 321         oldmem = buf->data;
 322
 323         spin_lock_irq(&dmxdevfilter->dev->lock);
 324         buf->data = newmem;
 325         buf->size = size;
 326
 327         /* reset and not flush in case the buffer shrinks */
 328         dvb_ringbuffer_reset(buf);
 329         spin_unlock_irq(&dmxdevfilter->dev->lock);
 330
 331         vfree(oldmem);
 332
 333         return 0;
 334 }
 335
 336 static void dvb_dmxdev_filter_timeout(unsigned long data)
 337 {
 338         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 339
 340         dmxdevfilter->buffer.error = -ETIMEDOUT;
 341         spin_lock_irq(&dmxdevfilter->dev->lock);
 342         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 343         spin_unlock_irq(&dmxdevfilter->dev->lock);
 344         wake_up(&dmxdevfilter->buffer.queue);
 345 }
 346
 347 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 348 {
 349         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 350
 351         del_timer(&dmxdevfilter->timer);
 352         if (para->timeout) {
 353                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 354                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 355                 dmxdevfilter->timer.expires =
 356                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 357                 add_timer(&dmxdevfilter->timer);
 358         }
 359 }
 360
 361 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 362                                        const u8 *buffer2, size_t buffer2_len,
 363                                        struct dmx_section_filter *filter,
 364                                        enum dmx_success success)
 365 {
 366         struct dmxdev_filter *dmxdevfilter = filter->priv;
 367         int ret;
 368
 369         if (dmxdevfilter->buffer.error) {
 370                 wake_up(&dmxdevfilter->buffer.queue);
 371                 return 0;
 372         }
 373         spin_lock(&dmxdevfilter->dev->lock);
 374         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 375                 spin_unlock(&dmxdevfilter->dev->lock);
 376                 return 0;
 377         }
 378         del_timer(&dmxdevfilter->timer);
 379         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 380                 buffer1[0], buffer1[1],
 381                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 382         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 383                                       buffer1_len);
 384         if (ret == buffer1_len) {
 385                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 386                                               buffer2_len);
 387         }
 388         if (ret < 0) {
 389                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 390                 dmxdevfilter->buffer.error = ret;
 391         }
 392         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 393                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 394         spin_unlock(&dmxdevfilter->dev->lock);
 395         wake_up(&dmxdevfilter->buffer.queue);
 396         return 0;
 397 }
 398
 399 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 400                                   const u8 *buffer2, size_t buffer2_len,
 401                                   struct dmx_ts_feed *feed,
 402                                   enum dmx_success success)
 403 {
 404         struct dmxdev_filter *dmxdevfilter = feed->priv;
 405         struct dvb_ringbuffer *buffer;
 406         int ret;
 407
 408         spin_lock(&dmxdevfilter->dev->lock);
 409         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 410                 spin_unlock(&dmxdevfilter->dev->lock);
 411                 return 0;
 412         }
 413
 414         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
 415             || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
 416                 buffer = &dmxdevfilter->buffer;
 417         else
 418                 buffer = &dmxdevfilter->dev->dvr_buffer;
 419         if (buffer->error) {
 420                 spin_unlock(&dmxdevfilter->dev->lock);
 421                 wake_up(&buffer->queue);
 422                 return 0;
 423         }
 424         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 425         if (ret == buffer1_len)
 426                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 427         if (ret < 0) {
 428                 dvb_ringbuffer_flush(buffer);
 429                 buffer->error = ret;
 430         }
 431         spin_unlock(&dmxdevfilter->dev->lock);
 432         wake_up(&buffer->queue);
 433         return 0;
 434 }
 435
 436 /* stop feed but only mark the specified filter as stopped (state set) */
 437 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 438 {
 439         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 440
 441         switch (dmxdevfilter->type) {
 442         case DMXDEV_TYPE_SEC:
 443                 del_timer(&dmxdevfilter->timer);
 444                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 445                 break;
 446         case DMXDEV_TYPE_PES:
 447                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 448                 break;
 449         default:
 450                 return -EINVAL;
 451         }
 452         return 0;
 453 }
 454
 455 /* start feed associated with the specified filter */
 456 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 457 {
 458         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 459
 460         switch (filter->type) {
 461         case DMXDEV_TYPE_SEC:
 462                 return filter->feed.sec->start_filtering(filter->feed.sec);
 463         case DMXDEV_TYPE_PES:
 464                 return filter->feed.ts->start_filtering(filter->feed.ts);
 465         default:
 466                 return -EINVAL;
 467         }
 468
 469         return 0;
 470 }
 471
 472 /* restart section feed if it has filters left associated with it,
 473    otherwise release the feed */
 474 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 475 {
 476         int i;
 477         struct dmxdev *dmxdev = filter->dev;
 478         u16 pid = filter->params.sec.pid;
 479
 480         for (i = 0; i < dmxdev->filternum; i++)
 481                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 482                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 483                     dmxdev->filter[i].params.sec.pid == pid) {
 484                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 485                         return 0;
 486                 }
 487
 488         filter->dev->demux->release_section_feed(dmxdev->demux,
 489                                                  filter->feed.sec);
 490
 491         return 0;
 492 }
 493
 494 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 495 {
 496         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 497                 return 0;
 498
 499         switch (dmxdevfilter->type) {
 500         case DMXDEV_TYPE_SEC:
 501                 if (!dmxdevfilter->feed.sec)
 502                         break;
 503                 dvb_dmxdev_feed_stop(dmxdevfilter);
 504                 if (dmxdevfilter->filter.sec)
 505                         dmxdevfilter->feed.sec->
 506                             release_filter(dmxdevfilter->feed.sec,
 507                                            dmxdevfilter->filter.sec);
 508                 dvb_dmxdev_feed_restart(dmxdevfilter);
 509                 dmxdevfilter->feed.sec = NULL;
 510                 break;
 511         case DMXDEV_TYPE_PES:
 512                 if (!dmxdevfilter->feed.ts)
 513                         break;
 514                 dvb_dmxdev_feed_stop(dmxdevfilter);
 515                 dmxdevfilter->dev->demux->
 516                     release_ts_feed(dmxdevfilter->dev->demux,
 517                                     dmxdevfilter->feed.ts);
 518                 dmxdevfilter->feed.ts = NULL;
 519                 break;
 520         default:
 521                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 522                         return 0;
 523                 return -EINVAL;
 524         }
 525
 526         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 527         return 0;
 528 }
 529
 530 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 531 {
 532         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 533                 return 0;
 534
 535         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 536         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 537         return 0;
 538 }
 539
 540 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 541 {
 542         struct dmxdev *dmxdev = filter->dev;
 543         void *mem;
 544         int ret, i;
 545
 546         if (filter->state < DMXDEV_STATE_SET)
 547                 return -EINVAL;
 548
 549         if (filter->state >= DMXDEV_STATE_GO)
 550                 dvb_dmxdev_filter_stop(filter);
 551
 552         if (!filter->buffer.data) {
 553                 mem = vmalloc(filter->buffer.size);
 554                 if (!mem)
 555                         return -ENOMEM;
 556                 spin_lock_irq(&filter->dev->lock);
 557                 filter->buffer.data = mem;
 558                 spin_unlock_irq(&filter->dev->lock);
 559         }
 560
 561         dvb_ringbuffer_flush(&filter->buffer);
 562
 563         switch (filter->type) {
 564         case DMXDEV_TYPE_SEC:
 565         {
 566                 struct dmx_sct_filter_params *para = &filter->params.sec;
 567                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 568                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 569
 570                 *secfilter = NULL;
 571                 *secfeed = NULL;
 572
 573
 574                 /* find active filter/feed with same PID */
 575                 for (i = 0; i < dmxdev->filternum; i++) {
 576                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 577                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 578                             dmxdev->filter[i].params.sec.pid == para->pid) {
 579                                 *secfeed = dmxdev->filter[i].feed.sec;
 580                                 break;
 581                         }
 582                 }
 583
 584                 /* if no feed found, try to allocate new one */
 585                 if (!*secfeed) {
 586                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 587                                                                    secfeed,
 588                                                                    dvb_dmxdev_section_callback);
 589                         if (ret < 0) {
 590                                 printk("DVB (%s): could not alloc feed\n",
 591                                        __func__);
 592                                 return ret;
 593                         }
 594
 595                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 596                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 597                         if (ret < 0) {
 598                                 printk("DVB (%s): could not set feed\n",
 599                                        __func__);
 600                                 dvb_dmxdev_feed_restart(filter);
 601                                 return ret;
 602                         }
 603                 } else {
 604                         dvb_dmxdev_feed_stop(filter);
 605                 }
 606
 607                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 608                 if (ret < 0) {
 609                         dvb_dmxdev_feed_restart(filter);
 610                         filter->feed.sec->start_filtering(*secfeed);
 611                         dprintk("could not get filter\n");
 612                         return ret;
 613                 }
 614
 615                 (*secfilter)->priv = filter;
 616
 617                 memcpy(&((*secfilter)->filter_value[3]),
 618                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 619                 memcpy(&(*secfilter)->filter_mask[3],
 620                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 621                 memcpy(&(*secfilter)->filter_mode[3],
 622                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 623
 624                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 625                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 626                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 627                 (*secfilter)->filter_mask[1] = 0;
 628                 (*secfilter)->filter_mask[2] = 0;
 629
 630                 filter->todo = 0;
 631
 632                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 633                 if (ret < 0)
 634                         return ret;
 635
 636                 dvb_dmxdev_filter_timer(filter);
 637                 break;
 638         }
 639         case DMXDEV_TYPE_PES:
 640         {
 641                 struct timespec timeout = { 0 };
 642                 struct dmx_pes_filter_params *para = &filter->params.pes;
 643                 dmx_output_t otype;
 644                 int ret;
 645                 int ts_type;
 646                 enum dmx_ts_pes ts_pes;
 647                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 648
 649                 filter->feed.ts = NULL;
 650                 otype = para->output;
 651
 652                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 653
 654                 if (ts_pes < DMX_PES_OTHER)
 655                         ts_type = TS_DECODER;
 656                 else
 657                         ts_type = 0;
 658
 659                 if (otype == DMX_OUT_TS_TAP)
 660                         ts_type |= TS_PACKET;
 661                 else if (otype == DMX_OUT_TSDEMUX_TAP)
 662                         ts_type |= TS_PACKET | TS_DEMUX;
 663                 else if (otype == DMX_OUT_TAP)
 664                         ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 665
 666                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 667                                                       tsfeed,
 668                                                       dvb_dmxdev_ts_callback);
 669                 if (ret < 0)
 670                         return ret;
 671
 672                 (*tsfeed)->priv = filter;
 673
 674                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 675                                      32768, timeout);
 676                 if (ret < 0) {
 677                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 678                                                        *tsfeed);
 679                         return ret;
 680                 }
 681
 682                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 683                 if (ret < 0) {
 684                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 685                                                        *tsfeed);
 686                         return ret;
 687                 }
 688
 689                 break;
 690         }
 691         default:
 692                 return -EINVAL;
 693         }
 694
 695         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 696         return 0;
 697 }
 698
 699 static int dvb_demux_open(struct inode *inode, struct file *file)
 700 {
 701         struct dvb_device *dvbdev = file->private_data;
 702         struct dmxdev *dmxdev = dvbdev->priv;
 703         int i;
 704         struct dmxdev_filter *dmxdevfilter;
 705
 706         if (!dmxdev->filter)
 707                 return -EINVAL;
 708
 709         if (mutex_lock_interruptible(&dmxdev->mutex))
 710                 return -ERESTARTSYS;
 711
 712         for (i = 0; i < dmxdev->filternum; i++)
 713                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 714                         break;
 715
 716         if (i == dmxdev->filternum) {
 717                 mutex_unlock(&dmxdev->mutex);
 718                 return -EMFILE;
 719         }
 720
 721         dmxdevfilter = &dmxdev->filter[i];
 722         mutex_init(&dmxdevfilter->mutex);
 723         file->private_data = dmxdevfilter;
 724
 725         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 726         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 727         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 728         dmxdevfilter->feed.ts = NULL;
 729         init_timer(&dmxdevfilter->timer);
 730
 731         dvbdev->users++;
 732
 733         mutex_unlock(&dmxdev->mutex);
 734         return 0;
 735 }
 736
 737 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 738                                   struct dmxdev_filter *dmxdevfilter)
 739 {
 740         mutex_lock(&dmxdev->mutex);
 741         mutex_lock(&dmxdevfilter->mutex);
 742
 743         dvb_dmxdev_filter_stop(dmxdevfilter);
 744         dvb_dmxdev_filter_reset(dmxdevfilter);
 745
 746         if (dmxdevfilter->buffer.data) {
 747                 void *mem = dmxdevfilter->buffer.data;
 748
 749                 spin_lock_irq(&dmxdev->lock);
 750                 dmxdevfilter->buffer.data = NULL;
 751                 spin_unlock_irq(&dmxdev->lock);
 752                 vfree(mem);
 753         }
 754
 755         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 756         wake_up(&dmxdevfilter->buffer.queue);
 757         mutex_unlock(&dmxdevfilter->mutex);
 758         mutex_unlock(&dmxdev->mutex);
 759         return 0;
 760 }
 761
 762 static inline void invert_mode(dmx_filter_t *filter)
 763 {
 764         int i;
 765
 766         for (i = 0; i < DMX_FILTER_SIZE; i++)
 767                 filter->mode[i] ^= 0xff;
 768 }
 769
 770 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 771                                  struct dmxdev_filter *dmxdevfilter,
 772                                  struct dmx_sct_filter_params *params)
 773 {
 774         dprintk("function : %s\n", __func__);
 775
 776         dvb_dmxdev_filter_stop(dmxdevfilter);
 777
 778         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 779         memcpy(&dmxdevfilter->params.sec,
 780                params, sizeof(struct dmx_sct_filter_params));
 781         invert_mode(&dmxdevfilter->params.sec.filter);
 782         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 783
 784         if (params->flags & DMX_IMMEDIATE_START)
 785                 return dvb_dmxdev_filter_start(dmxdevfilter);
 786
 787         return 0;
 788 }
 789
 790 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 791                                      struct dmxdev_filter *dmxdevfilter,
 792                                      struct dmx_pes_filter_params *params)
 793 {
 794         dvb_dmxdev_filter_stop(dmxdevfilter);
 795
 796         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 797                 return -EINVAL;
 798
 799         dmxdevfilter->type = DMXDEV_TYPE_PES;
 800         memcpy(&dmxdevfilter->params, params,
 801                sizeof(struct dmx_pes_filter_params));
 802
 803         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 804
 805         if (params->flags & DMX_IMMEDIATE_START)
 806                 return dvb_dmxdev_filter_start(dmxdevfilter);
 807
 808         return 0;
 809 }
 810
 811 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 812                                    struct file *file, char __user *buf,
 813                                    size_t count, loff_t *ppos)
 814 {
 815         int result, hcount;
 816         int done = 0;
 817
 818         if (dfil->todo <= 0) {
 819                 hcount = 3 + dfil->todo;
 820                 if (hcount > count)
 821                         hcount = count;
 822                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 823                                                 file->f_flags & O_NONBLOCK,
 824                                                 buf, hcount, ppos);
 825                 if (result < 0) {
 826                         dfil->todo = 0;
 827                         return result;
 828                 }
 829                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 830                         return -EFAULT;
 831                 buf += result;
 832                 done = result;
 833                 count -= result;
 834                 dfil->todo -= result;
 835                 if (dfil->todo > -3)
 836                         return done;
 837                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 838                 if (!count)
 839                         return done;
 840         }
 841         if (count > dfil->todo)
 842                 count = dfil->todo;
 843         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 844                                         file->f_flags & O_NONBLOCK,
 845                                         buf, count, ppos);
 846         if (result < 0)
 847                 return result;
 848         dfil->todo -= result;
 849         return (result + done);
 850 }
 851
 852 static ssize_t
 853 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 854                loff_t *ppos)
 855 {
 856         struct dmxdev_filter *dmxdevfilter = file->private_data;
 857         int ret;
 858
 859         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 860                 return -ERESTARTSYS;
 861
 862         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 863                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 864         else
 865                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 866                                              file->f_flags & O_NONBLOCK,
 867                                              buf, count, ppos);
 868
 869         mutex_unlock(&dmxdevfilter->mutex);
 870         return ret;
 871 }
 872
 873 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 874                               unsigned int cmd, void *parg)
 875 {
 876         struct dmxdev_filter *dmxdevfilter = file->private_data;
 877         struct dmxdev *dmxdev = dmxdevfilter->dev;
 878         unsigned long arg = (unsigned long)parg;
 879         int ret = 0;
 880
 881         if (mutex_lock_interruptible(&dmxdev->mutex))
 882                 return -ERESTARTSYS;
 883
 884         switch (cmd) {
 885         case DMX_START:
 886                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 887                         mutex_unlock(&dmxdev->mutex);
 888                         return -ERESTARTSYS;
 889                 }
 890                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 891                         ret = -EINVAL;
 892                 else
 893                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 894                 mutex_unlock(&dmxdevfilter->mutex);
 895                 break;
 896
 897         case DMX_STOP:
 898                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 899                         mutex_unlock(&dmxdev->mutex);
 900                         return -ERESTARTSYS;
 901                 }
 902                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 903                 mutex_unlock(&dmxdevfilter->mutex);
 904                 break;
 905
 906         case DMX_SET_FILTER:
 907                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 908                         mutex_unlock(&dmxdev->mutex);
 909                         return -ERESTARTSYS;
 910                 }
 911                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 912                 mutex_unlock(&dmxdevfilter->mutex);
 913                 break;
 914
 915         case DMX_SET_PES_FILTER:
 916                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 917                         mutex_unlock(&dmxdev->mutex);
 918                         return -ERESTARTSYS;
 919                 }
 920                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 921                 mutex_unlock(&dmxdevfilter->mutex);
 922                 break;
 923
 924         case DMX_SET_BUFFER_SIZE:
 925                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 926                         mutex_unlock(&dmxdev->mutex);
 927                         return -ERESTARTSYS;
 928                 }
 929                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 930                 mutex_unlock(&dmxdevfilter->mutex);
 931                 break;
 932
 933         case DMX_GET_PES_PIDS:
 934                 if (!dmxdev->demux->get_pes_pids) {
 935                         ret = -EINVAL;
 936                         break;
 937                 }
 938                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 939                 break;
 940
 941         case DMX_GET_CAPS:
 942                 if (!dmxdev->demux->get_caps) {
 943                         ret = -EINVAL;
 944                         break;
 945                 }
 946                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 947                 break;
 948
 949         case DMX_SET_SOURCE:
 950                 if (!dmxdev->demux->set_source) {
 951                         ret = -EINVAL;
 952                         break;
 953                 }
 954                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 955                 break;
 956
 957         case DMX_GET_STC:
 958                 if (!dmxdev->demux->get_stc) {
 959                         ret = -EINVAL;
 960                         break;
 961                 }
 962                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 963                                              ((struct dmx_stc *)parg)->num,
 964                                              &((struct dmx_stc *)parg)->stc,
 965                                              &((struct dmx_stc *)parg)->base);
 966                 break;
 967
 968         default:
 969                 ret = -EINVAL;
 970                 break;
 971         }
 972         mutex_unlock(&dmxdev->mutex);
 973         return ret;
 974 }
 975
 976 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 977                            unsigned int cmd, unsigned long arg)
 978 {
 979         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 980 }
 981
 982 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 983 {
 984         struct dmxdev_filter *dmxdevfilter = file->private_data;
 985         unsigned int mask = 0;
 986
 987         if (!dmxdevfilter)
 988                 return -EINVAL;
 989
 990         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 991
 992         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 993             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 994             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 995                 return 0;
 996
 997         if (dmxdevfilter->buffer.error)
 998                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 999
1000         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1001                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1002
1003         return mask;
1004 }
1005
1006 static int dvb_demux_release(struct inode *inode, struct file *file)
1007 {
1008         struct dmxdev_filter *dmxdevfilter = file->private_data;
1009         struct dmxdev *dmxdev = dmxdevfilter->dev;
1010
1011         int ret;
1012
1013         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1014
1015         mutex_lock(&dmxdev->mutex);
1016         dmxdev->dvbdev->users--;
1017         if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
1018                 fops_put(file->f_op);
1019                 file->f_op = NULL;
1020                 mutex_unlock(&dmxdev->mutex);
1021                 wake_up(&dmxdev->dvbdev->wait_queue);
1022         } else
1023                 mutex_unlock(&dmxdev->mutex);
1024
1025         return ret;
1026 }
1027
1028 static struct file_operations dvb_demux_fops = {
1029         .owner = THIS_MODULE,
1030         .read = dvb_demux_read,
1031         .ioctl = dvb_demux_ioctl,
1032         .open = dvb_demux_open,
1033         .release = dvb_demux_release,
1034         .poll = dvb_demux_poll,
1035 };
1036
1037 static struct dvb_device dvbdev_demux = {
1038         .priv = NULL,
1039         .users = 1,
1040         .writers = 1,
1041         .fops = &dvb_demux_fops
1042 };
1043
1044 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1045                             unsigned int cmd, void *parg)
1046 {
1047         struct dvb_device *dvbdev = file->private_data;
1048         struct dmxdev *dmxdev = dvbdev->priv;
1049         unsigned long arg = (unsigned long)parg;
1050         int ret;
1051
1052         if (mutex_lock_interruptible(&dmxdev->mutex))
1053                 return -ERESTARTSYS;
1054
1055         switch (cmd) {
1056         case DMX_SET_BUFFER_SIZE:
1057                 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1058                 break;
1059
1060         default:
1061                 ret = -EINVAL;
1062                 break;
1063         }
1064         mutex_unlock(&dmxdev->mutex);
1065         return ret;
1066 }
1067
1068 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1069                          unsigned int cmd, unsigned long arg)
1070 {
1071         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1072 }
1073
1074 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1075 {
1076         struct dvb_device *dvbdev = file->private_data;
1077         struct dmxdev *dmxdev = dvbdev->priv;
1078         unsigned int mask = 0;
1079
1080         dprintk("function : %s\n", __func__);
1081
1082         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1083
1084         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1085                 if (dmxdev->dvr_buffer.error)
1086                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1087
1088                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1089                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1090         } else
1091                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1092
1093         return mask;
1094 }
1095
1096 static struct file_operations dvb_dvr_fops = {
1097         .owner = THIS_MODULE,
1098         .read = dvb_dvr_read,
1099         .write = dvb_dvr_write,
1100         .ioctl = dvb_dvr_ioctl,
1101         .open = dvb_dvr_open,
1102         .release = dvb_dvr_release,
1103         .poll = dvb_dvr_poll,
1104 };
1105
1106 static struct dvb_device dvbdev_dvr = {
1107         .priv = NULL,
1108         .readers = 1,
1109         .users = 1,
1110         .fops = &dvb_dvr_fops
1111 };
1112
1113 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1114 {
1115         int i;
1116
1117         if (dmxdev->demux->open(dmxdev->demux) < 0)
1118                 return -EUSERS;
1119
1120         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1121         if (!dmxdev->filter)
1122                 return -ENOMEM;
1123
1124         mutex_init(&dmxdev->mutex);
1125         spin_lock_init(&dmxdev->lock);
1126         for (i = 0; i < dmxdev->filternum; i++) {
1127                 dmxdev->filter[i].dev = dmxdev;
1128                 dmxdev->filter[i].buffer.data = NULL;
1129                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1130                                             DMXDEV_STATE_FREE);
1131         }
1132
1133         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1134                             DVB_DEVICE_DEMUX);
1135         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1136                             dmxdev, DVB_DEVICE_DVR);
1137
1138         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1139
1140         return 0;
1141 }
1142
1143 EXPORT_SYMBOL(dvb_dmxdev_init);
1144
1145 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1146 {
1147         dmxdev->exit=1;
1148         if (dmxdev->dvbdev->users > 1) {
1149                 wait_event(dmxdev->dvbdev->wait_queue,
1150                                 dmxdev->dvbdev->users==1);
1151         }
1152         if (dmxdev->dvr_dvbdev->users > 1) {
1153                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1154                                 dmxdev->dvr_dvbdev->users==1);
1155         }
1156
1157         dvb_unregister_device(dmxdev->dvbdev);
1158         dvb_unregister_device(dmxdev->dvr_dvbdev);
1159
1160         vfree(dmxdev->filter);
1161         dmxdev->filter = NULL;
1162         dmxdev->demux->close(dmxdev->demux);
1163 }
1164
1165 EXPORT_SYMBOL(dvb_dmxdev_release);