drivers/media/dvb-core/dmxdev.c

   1 // SPDX-License-Identifier: LGPL-2.1-or-later
   2 /*
   3  * dmxdev.c - DVB demultiplexer device
   4  *
   5  * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
   6  *                    for convergence integrated media GmbH
   7  */
   8
   9 #define pr_fmt(fmt) "dmxdev: " fmt
  10
  11 #include <linux/sched.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/slab.h>
  14 #include <linux/vmalloc.h>
  15 #include <linux/module.h>
  16 #include <linux/poll.h>
  17 #include <linux/ioctl.h>
  18 #include <linux/wait.h>
  19 #include <linux/uaccess.h>
  20 #include <media/dmxdev.h>
  21 #include <media/dvb_vb2.h>
  22
  23 static int debug;
  24
  25 module_param(debug, int, 0644);
  26 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  27
  28 #define dprintk(fmt, arg...) do {                                       \
  29         if (debug)                                                      \
  30                 printk(KERN_DEBUG pr_fmt("%s: " fmt),                   \
  31                         __func__, ##arg);                               \
  32 } while (0)
  33
  34 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
  35                                    const u8 *src, size_t len)
  36 {
  37         ssize_t free;
  38
  39         if (!len)
  40                 return 0;
  41         if (!buf->data)
  42                 return 0;
  43
  44         free = dvb_ringbuffer_free(buf);
  45         if (len > free) {
  46                 dprintk("buffer overflow\n");
  47                 return -EOVERFLOW;
  48         }
  49
  50         return dvb_ringbuffer_write(buf, src, len);
  51 }
  52
  53 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
  54                                       int non_blocking, char __user *buf,
  55                                       size_t count, loff_t *ppos)
  56 {
  57         size_t todo;
  58         ssize_t avail;
  59         ssize_t ret = 0;
  60
  61         if (!src->data)
  62                 return 0;
  63
  64         if (src->error) {
  65                 ret = src->error;
  66                 dvb_ringbuffer_flush(src);
  67                 return ret;
  68         }
  69
  70         for (todo = count; todo > 0; todo -= ret) {
  71                 if (non_blocking && dvb_ringbuffer_empty(src)) {
  72                         ret = -EWOULDBLOCK;
  73                         break;
  74                 }
  75
  76                 ret = wait_event_interruptible(src->queue,
  77                                                !dvb_ringbuffer_empty(src) ||
  78                                                (src->error != 0));
  79                 if (ret < 0)
  80                         break;
  81
  82                 if (src->error) {
  83                         ret = src->error;
  84                         dvb_ringbuffer_flush(src);
  85                         break;
  86                 }
  87
  88                 avail = dvb_ringbuffer_avail(src);
  89                 if (avail > todo)
  90                         avail = todo;
  91
  92                 ret = dvb_ringbuffer_read_user(src, buf, avail);
  93                 if (ret < 0)
  94                         break;
  95
  96                 buf += ret;
  97         }
  98
  99         return (count - todo) ? (count - todo) : ret;
 100 }
 101
 102 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 103 {
 104         struct list_head *head, *pos;
 105
 106         head = demux->get_frontends(demux);
 107         if (!head)
 108                 return NULL;
 109         list_for_each(pos, head)
 110                 if (DMX_FE_ENTRY(pos)->source == type)
 111                         return DMX_FE_ENTRY(pos);
 112
 113         return NULL;
 114 }
 115
 116 static int dvb_dvr_open(struct inode *inode, struct file *file)
 117 {
 118         struct dvb_device *dvbdev = file->private_data;
 119         struct dmxdev *dmxdev = dvbdev->priv;
 120         struct dmx_frontend *front;
 121         bool need_ringbuffer = false;
 122
 123         dprintk("%s\n", __func__);
 124
 125         if (mutex_lock_interruptible(&dmxdev->mutex))
 126                 return -ERESTARTSYS;
 127
 128         if (dmxdev->exit) {
 129                 mutex_unlock(&dmxdev->mutex);
 130                 return -ENODEV;
 131         }
 132
 133         dmxdev->may_do_mmap = 0;
 134
 135         /*
 136          * The logic here is a little tricky due to the ifdef.
 137          *
 138          * The ringbuffer is used for both read and mmap.
 139          *
 140          * It is not needed, however, on two situations:
 141          *      - Write devices (access with O_WRONLY);
 142          *      - For duplex device nodes, opened with O_RDWR.
 143          */
 144
 145         if ((file->f_flags & O_ACCMODE) == O_RDONLY)
 146                 need_ringbuffer = true;
 147         else if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 148                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 149 #ifdef CONFIG_DVB_MMAP
 150                         dmxdev->may_do_mmap = 1;
 151                         need_ringbuffer = true;
 152 #else
 153                         mutex_unlock(&dmxdev->mutex);
 154                         return -EOPNOTSUPP;
 155 #endif
 156                 }
 157         }
 158
 159         if (need_ringbuffer) {
 160                 void *mem;
 161
 162                 if (!dvbdev->readers) {
 163                         mutex_unlock(&dmxdev->mutex);
 164                         return -EBUSY;
 165                 }
 166                 mem = vmalloc(DVR_BUFFER_SIZE);
 167                 if (!mem) {
 168                         mutex_unlock(&dmxdev->mutex);
 169                         return -ENOMEM;
 170                 }
 171                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 172                 if (dmxdev->may_do_mmap)
 173                         dvb_vb2_init(&dmxdev->dvr_vb2_ctx, "dvr",
 174                                      file->f_flags & O_NONBLOCK);
 175                 dvbdev->readers--;
 176         }
 177
 178         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 179                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 180
 181                 if (!dmxdev->demux->write) {
 182                         mutex_unlock(&dmxdev->mutex);
 183                         return -EOPNOTSUPP;
 184                 }
 185
 186                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 187
 188                 if (!front) {
 189                         mutex_unlock(&dmxdev->mutex);
 190                         return -EINVAL;
 191                 }
 192                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 193                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 194         }
 195         dvbdev->users++;
 196         mutex_unlock(&dmxdev->mutex);
 197         return 0;
 198 }
 199
 200 static int dvb_dvr_release(struct inode *inode, struct file *file)
 201 {
 202         struct dvb_device *dvbdev = file->private_data;
 203         struct dmxdev *dmxdev = dvbdev->priv;
 204
 205         mutex_lock(&dmxdev->mutex);
 206
 207         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 208                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 209                 dmxdev->demux->connect_frontend(dmxdev->demux,
 210                                                 dmxdev->dvr_orig_fe);
 211         }
 212
 213         if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||
 214             dmxdev->may_do_mmap) {
 215                 if (dmxdev->may_do_mmap) {
 216                         if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
 217                                 dvb_vb2_stream_off(&dmxdev->dvr_vb2_ctx);
 218                         dvb_vb2_release(&dmxdev->dvr_vb2_ctx);
 219                 }
 220                 dvbdev->readers++;
 221                 if (dmxdev->dvr_buffer.data) {
 222                         void *mem = dmxdev->dvr_buffer.data;
 223                         /*memory barrier*/
 224                         mb();
 225                         spin_lock_irq(&dmxdev->lock);
 226                         dmxdev->dvr_buffer.data = NULL;
 227                         spin_unlock_irq(&dmxdev->lock);
 228                         vfree(mem);
 229                 }
 230         }
 231         /* TODO */
 232         dvbdev->users--;
 233         if (dvbdev->users == 1 && dmxdev->exit == 1) {
 234                 mutex_unlock(&dmxdev->mutex);
 235                 wake_up(&dvbdev->wait_queue);
 236         } else
 237                 mutex_unlock(&dmxdev->mutex);
 238
 239         return 0;
 240 }
 241
 242 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 243                              size_t count, 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->demux->write)
 250                 return -EOPNOTSUPP;
 251         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 252                 return -EINVAL;
 253         if (mutex_lock_interruptible(&dmxdev->mutex))
 254                 return -ERESTARTSYS;
 255
 256         if (dmxdev->exit) {
 257                 mutex_unlock(&dmxdev->mutex);
 258                 return -ENODEV;
 259         }
 260         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 261         mutex_unlock(&dmxdev->mutex);
 262         return ret;
 263 }
 264
 265 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 266                             loff_t *ppos)
 267 {
 268         struct dvb_device *dvbdev = file->private_data;
 269         struct dmxdev *dmxdev = dvbdev->priv;
 270
 271         if (dmxdev->exit)
 272                 return -ENODEV;
 273
 274         return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 275                                       file->f_flags & O_NONBLOCK,
 276                                       buf, count, ppos);
 277 }
 278
 279 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
 280                                       unsigned long size)
 281 {
 282         struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
 283         void *newmem;
 284         void *oldmem;
 285
 286         dprintk("%s\n", __func__);
 287
 288         if (buf->size == size)
 289                 return 0;
 290         if (!size)
 291                 return -EINVAL;
 292
 293         newmem = vmalloc(size);
 294         if (!newmem)
 295                 return -ENOMEM;
 296
 297         oldmem = buf->data;
 298
 299         spin_lock_irq(&dmxdev->lock);
 300         buf->data = newmem;
 301         buf->size = size;
 302
 303         /* reset and not flush in case the buffer shrinks */
 304         dvb_ringbuffer_reset(buf);
 305         spin_unlock_irq(&dmxdev->lock);
 306
 307         vfree(oldmem);
 308
 309         return 0;
 310 }
 311
 312 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 313                                                *dmxdevfilter, int state)
 314 {
 315         spin_lock_irq(&dmxdevfilter->dev->lock);
 316         dmxdevfilter->state = state;
 317         spin_unlock_irq(&dmxdevfilter->dev->lock);
 318 }
 319
 320 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 321                                       unsigned long size)
 322 {
 323         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 324         void *newmem;
 325         void *oldmem;
 326
 327         if (buf->size == size)
 328                 return 0;
 329         if (!size)
 330                 return -EINVAL;
 331         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 332                 return -EBUSY;
 333
 334         newmem = vmalloc(size);
 335         if (!newmem)
 336                 return -ENOMEM;
 337
 338         oldmem = buf->data;
 339
 340         spin_lock_irq(&dmxdevfilter->dev->lock);
 341         buf->data = newmem;
 342         buf->size = size;
 343
 344         /* reset and not flush in case the buffer shrinks */
 345         dvb_ringbuffer_reset(buf);
 346         spin_unlock_irq(&dmxdevfilter->dev->lock);
 347
 348         vfree(oldmem);
 349
 350         return 0;
 351 }
 352
 353 static void dvb_dmxdev_filter_timeout(struct timer_list *t)
 354 {
 355         struct dmxdev_filter *dmxdevfilter = from_timer(dmxdevfilter, t, timer);
 356
 357         dmxdevfilter->buffer.error = -ETIMEDOUT;
 358         spin_lock_irq(&dmxdevfilter->dev->lock);
 359         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 360         spin_unlock_irq(&dmxdevfilter->dev->lock);
 361         wake_up(&dmxdevfilter->buffer.queue);
 362 }
 363
 364 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 365 {
 366         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 367
 368         del_timer(&dmxdevfilter->timer);
 369         if (para->timeout) {
 370                 dmxdevfilter->timer.expires =
 371                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 372                 add_timer(&dmxdevfilter->timer);
 373         }
 374 }
 375
 376 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 377                                        const u8 *buffer2, size_t buffer2_len,
 378                                        struct dmx_section_filter *filter,
 379                                        u32 *buffer_flags)
 380 {
 381         struct dmxdev_filter *dmxdevfilter = filter->priv;
 382         int ret;
 383
 384         if (!dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx) &&
 385             dmxdevfilter->buffer.error) {
 386                 wake_up(&dmxdevfilter->buffer.queue);
 387                 return 0;
 388         }
 389         spin_lock(&dmxdevfilter->dev->lock);
 390         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 391                 spin_unlock(&dmxdevfilter->dev->lock);
 392                 return 0;
 393         }
 394         del_timer(&dmxdevfilter->timer);
 395         dprintk("section callback %*ph\n", 6, buffer1);
 396         if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx)) {
 397                 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
 398                                           buffer1, buffer1_len,
 399                                           buffer_flags);
 400                 if (ret == buffer1_len)
 401                         ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
 402                                                   buffer2, buffer2_len,
 403                                                   buffer_flags);
 404         } else {
 405                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
 406                                               buffer1, buffer1_len);
 407                 if (ret == buffer1_len) {
 408                         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
 409                                                       buffer2, buffer2_len);
 410                 }
 411         }
 412         if (ret < 0)
 413                 dmxdevfilter->buffer.error = ret;
 414         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 415                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 416         spin_unlock(&dmxdevfilter->dev->lock);
 417         wake_up(&dmxdevfilter->buffer.queue);
 418         return 0;
 419 }
 420
 421 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 422                                   const u8 *buffer2, size_t buffer2_len,
 423                                   struct dmx_ts_feed *feed,
 424                                   u32 *buffer_flags)
 425 {
 426         struct dmxdev_filter *dmxdevfilter = feed->priv;
 427         struct dvb_ringbuffer *buffer;
 428 #ifdef CONFIG_DVB_MMAP
 429         struct dvb_vb2_ctx *ctx;
 430 #endif
 431         int ret;
 432
 433         spin_lock(&dmxdevfilter->dev->lock);
 434         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 435                 spin_unlock(&dmxdevfilter->dev->lock);
 436                 return 0;
 437         }
 438
 439         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP ||
 440             dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) {
 441                 buffer = &dmxdevfilter->buffer;
 442 #ifdef CONFIG_DVB_MMAP
 443                 ctx = &dmxdevfilter->vb2_ctx;
 444 #endif
 445         } else {
 446                 buffer = &dmxdevfilter->dev->dvr_buffer;
 447 #ifdef CONFIG_DVB_MMAP
 448                 ctx = &dmxdevfilter->dev->dvr_vb2_ctx;
 449 #endif
 450         }
 451
 452         if (dvb_vb2_is_streaming(ctx)) {
 453                 ret = dvb_vb2_fill_buffer(ctx, buffer1, buffer1_len,
 454                                           buffer_flags);
 455                 if (ret == buffer1_len)
 456                         ret = dvb_vb2_fill_buffer(ctx, buffer2, buffer2_len,
 457                                                   buffer_flags);
 458         } else {
 459                 if (buffer->error) {
 460                         spin_unlock(&dmxdevfilter->dev->lock);
 461                         wake_up(&buffer->queue);
 462                         return 0;
 463                 }
 464                 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 465                 if (ret == buffer1_len)
 466                         ret = dvb_dmxdev_buffer_write(buffer,
 467                                                       buffer2, buffer2_len);
 468         }
 469         if (ret < 0)
 470                 buffer->error = ret;
 471         spin_unlock(&dmxdevfilter->dev->lock);
 472         wake_up(&buffer->queue);
 473         return 0;
 474 }
 475
 476 /* stop feed but only mark the specified filter as stopped (state set) */
 477 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 478 {
 479         struct dmxdev_feed *feed;
 480
 481         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 482
 483         switch (dmxdevfilter->type) {
 484         case DMXDEV_TYPE_SEC:
 485                 del_timer(&dmxdevfilter->timer);
 486                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 487                 break;
 488         case DMXDEV_TYPE_PES:
 489                 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
 490                         feed->ts->stop_filtering(feed->ts);
 491                 break;
 492         default:
 493                 return -EINVAL;
 494         }
 495         return 0;
 496 }
 497
 498 /* start feed associated with the specified filter */
 499 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 500 {
 501         struct dmxdev_feed *feed;
 502         int ret;
 503
 504         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 505
 506         switch (filter->type) {
 507         case DMXDEV_TYPE_SEC:
 508                 return filter->feed.sec->start_filtering(filter->feed.sec);
 509         case DMXDEV_TYPE_PES:
 510                 list_for_each_entry(feed, &filter->feed.ts, next) {
 511                         ret = feed->ts->start_filtering(feed->ts);
 512                         if (ret < 0) {
 513                                 dvb_dmxdev_feed_stop(filter);
 514                                 return ret;
 515                         }
 516                 }
 517                 break;
 518         default:
 519                 return -EINVAL;
 520         }
 521
 522         return 0;
 523 }
 524
 525 /* restart section feed if it has filters left associated with it,
 526    otherwise release the feed */
 527 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 528 {
 529         int i;
 530         struct dmxdev *dmxdev = filter->dev;
 531         u16 pid = filter->params.sec.pid;
 532
 533         for (i = 0; i < dmxdev->filternum; i++)
 534                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 535                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 536                     dmxdev->filter[i].params.sec.pid == pid) {
 537                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 538                         return 0;
 539                 }
 540
 541         filter->dev->demux->release_section_feed(dmxdev->demux,
 542                                                  filter->feed.sec);
 543
 544         return 0;
 545 }
 546
 547 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 548 {
 549         struct dmxdev_feed *feed;
 550         struct dmx_demux *demux;
 551
 552         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 553                 return 0;
 554
 555         switch (dmxdevfilter->type) {
 556         case DMXDEV_TYPE_SEC:
 557                 if (!dmxdevfilter->feed.sec)
 558                         break;
 559                 dvb_dmxdev_feed_stop(dmxdevfilter);
 560                 if (dmxdevfilter->filter.sec)
 561                         dmxdevfilter->feed.sec->
 562                             release_filter(dmxdevfilter->feed.sec,
 563                                            dmxdevfilter->filter.sec);
 564                 dvb_dmxdev_feed_restart(dmxdevfilter);
 565                 dmxdevfilter->feed.sec = NULL;
 566                 break;
 567         case DMXDEV_TYPE_PES:
 568                 dvb_dmxdev_feed_stop(dmxdevfilter);
 569                 demux = dmxdevfilter->dev->demux;
 570                 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
 571                         demux->release_ts_feed(demux, feed->ts);
 572                         feed->ts = NULL;
 573                 }
 574                 break;
 575         default:
 576                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 577                         return 0;
 578                 return -EINVAL;
 579         }
 580
 581         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 582         return 0;
 583 }
 584
 585 static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
 586 {
 587         struct dmxdev_feed *feed, *tmp;
 588
 589         /* delete all PIDs */
 590         list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
 591                 list_del(&feed->next);
 592                 kfree(feed);
 593         }
 594
 595         BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
 596 }
 597
 598 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 599 {
 600         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 601                 return 0;
 602
 603         if (dmxdevfilter->type == DMXDEV_TYPE_PES)
 604                 dvb_dmxdev_delete_pids(dmxdevfilter);
 605
 606         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 607         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 608         return 0;
 609 }
 610
 611 static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
 612                                  struct dmxdev_filter *filter,
 613                                  struct dmxdev_feed *feed)
 614 {
 615         ktime_t timeout = ktime_set(0, 0);
 616         struct dmx_pes_filter_params *para = &filter->params.pes;
 617         enum dmx_output otype;
 618         int ret;
 619         int ts_type;
 620         enum dmx_ts_pes ts_pes;
 621         struct dmx_ts_feed *tsfeed;
 622
 623         feed->ts = NULL;
 624         otype = para->output;
 625
 626         ts_pes = para->pes_type;
 627
 628         if (ts_pes < DMX_PES_OTHER)
 629                 ts_type = TS_DECODER;
 630         else
 631                 ts_type = 0;
 632
 633         if (otype == DMX_OUT_TS_TAP)
 634                 ts_type |= TS_PACKET;
 635         else if (otype == DMX_OUT_TSDEMUX_TAP)
 636                 ts_type |= TS_PACKET | TS_DEMUX;
 637         else if (otype == DMX_OUT_TAP)
 638                 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 639
 640         ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
 641                                               dvb_dmxdev_ts_callback);
 642         if (ret < 0)
 643                 return ret;
 644
 645         tsfeed = feed->ts;
 646         tsfeed->priv = filter;
 647
 648         ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
 649         if (ret < 0) {
 650                 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
 651                 return ret;
 652         }
 653
 654         ret = tsfeed->start_filtering(tsfeed);
 655         if (ret < 0) {
 656                 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
 657                 return ret;
 658         }
 659
 660         return 0;
 661 }
 662
 663 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 664 {
 665         struct dmxdev *dmxdev = filter->dev;
 666         struct dmxdev_feed *feed;
 667         void *mem;
 668         int ret, i;
 669
 670         if (filter->state < DMXDEV_STATE_SET)
 671                 return -EINVAL;
 672
 673         if (filter->state >= DMXDEV_STATE_GO)
 674                 dvb_dmxdev_filter_stop(filter);
 675
 676         if (!filter->buffer.data) {
 677                 mem = vmalloc(filter->buffer.size);
 678                 if (!mem)
 679                         return -ENOMEM;
 680                 spin_lock_irq(&filter->dev->lock);
 681                 filter->buffer.data = mem;
 682                 spin_unlock_irq(&filter->dev->lock);
 683         }
 684
 685         dvb_ringbuffer_flush(&filter->buffer);
 686
 687         switch (filter->type) {
 688         case DMXDEV_TYPE_SEC:
 689         {
 690                 struct dmx_sct_filter_params *para = &filter->params.sec;
 691                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 692                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 693
 694                 *secfilter = NULL;
 695                 *secfeed = NULL;
 696
 697
 698                 /* find active filter/feed with same PID */
 699                 for (i = 0; i < dmxdev->filternum; i++) {
 700                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 701                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 702                             dmxdev->filter[i].params.sec.pid == para->pid) {
 703                                 *secfeed = dmxdev->filter[i].feed.sec;
 704                                 break;
 705                         }
 706                 }
 707
 708                 /* if no feed found, try to allocate new one */
 709                 if (!*secfeed) {
 710                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 711                                                                    secfeed,
 712                                                                    dvb_dmxdev_section_callback);
 713                         if (!*secfeed) {
 714                                 pr_err("DVB (%s): could not alloc feed\n",
 715                                        __func__);
 716                                 return ret;
 717                         }
 718
 719                         ret = (*secfeed)->set(*secfeed, para->pid,
 720                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 721                         if (ret < 0) {
 722                                 pr_err("DVB (%s): could not set feed\n",
 723                                        __func__);
 724                                 dvb_dmxdev_feed_restart(filter);
 725                                 return ret;
 726                         }
 727                 } else {
 728                         dvb_dmxdev_feed_stop(filter);
 729                 }
 730
 731                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 732                 if (ret < 0) {
 733                         dvb_dmxdev_feed_restart(filter);
 734                         filter->feed.sec->start_filtering(*secfeed);
 735                         dprintk("could not get filter\n");
 736                         return ret;
 737                 }
 738
 739                 (*secfilter)->priv = filter;
 740
 741                 memcpy(&((*secfilter)->filter_value[3]),
 742                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 743                 memcpy(&(*secfilter)->filter_mask[3],
 744                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 745                 memcpy(&(*secfilter)->filter_mode[3],
 746                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 747
 748                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 749                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 750                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 751                 (*secfilter)->filter_mask[1] = 0;
 752                 (*secfilter)->filter_mask[2] = 0;
 753
 754                 filter->todo = 0;
 755
 756                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 757                 if (ret < 0)
 758                         return ret;
 759
 760                 dvb_dmxdev_filter_timer(filter);
 761                 break;
 762         }
 763         case DMXDEV_TYPE_PES:
 764                 list_for_each_entry(feed, &filter->feed.ts, next) {
 765                         ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
 766                         if (ret < 0) {
 767                                 dvb_dmxdev_filter_stop(filter);
 768                                 return ret;
 769                         }
 770                 }
 771                 break;
 772         default:
 773                 return -EINVAL;
 774         }
 775
 776         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 777         return 0;
 778 }
 779
 780 static int dvb_demux_open(struct inode *inode, struct file *file)
 781 {
 782         struct dvb_device *dvbdev = file->private_data;
 783         struct dmxdev *dmxdev = dvbdev->priv;
 784         int i;
 785         struct dmxdev_filter *dmxdevfilter;
 786
 787         if (!dmxdev->filter)
 788                 return -EINVAL;
 789
 790         if (mutex_lock_interruptible(&dmxdev->mutex))
 791                 return -ERESTARTSYS;
 792
 793         if (dmxdev->exit) {
 794                 mutex_unlock(&dmxdev->mutex);
 795                 return -ENODEV;
 796         }
 797
 798         for (i = 0; i < dmxdev->filternum; i++)
 799                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 800                         break;
 801
 802         if (i == dmxdev->filternum) {
 803                 mutex_unlock(&dmxdev->mutex);
 804                 return -EMFILE;
 805         }
 806
 807         dmxdevfilter = &dmxdev->filter[i];
 808         mutex_init(&dmxdevfilter->mutex);
 809         file->private_data = dmxdevfilter;
 810
 811 #ifdef CONFIG_DVB_MMAP
 812         dmxdev->may_do_mmap = 1;
 813 #else
 814         dmxdev->may_do_mmap = 0;
 815 #endif
 816
 817         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 818         dvb_vb2_init(&dmxdevfilter->vb2_ctx, "demux_filter",
 819                      file->f_flags & O_NONBLOCK);
 820         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 821         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 822         timer_setup(&dmxdevfilter->timer, dvb_dmxdev_filter_timeout, 0);
 823
 824         dvbdev->users++;
 825
 826         mutex_unlock(&dmxdev->mutex);
 827         return 0;
 828 }
 829
 830 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 831                                   struct dmxdev_filter *dmxdevfilter)
 832 {
 833         mutex_lock(&dmxdev->mutex);
 834         mutex_lock(&dmxdevfilter->mutex);
 835         if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
 836                 dvb_vb2_stream_off(&dmxdevfilter->vb2_ctx);
 837         dvb_vb2_release(&dmxdevfilter->vb2_ctx);
 838
 839
 840         dvb_dmxdev_filter_stop(dmxdevfilter);
 841         dvb_dmxdev_filter_reset(dmxdevfilter);
 842
 843         if (dmxdevfilter->buffer.data) {
 844                 void *mem = dmxdevfilter->buffer.data;
 845
 846                 spin_lock_irq(&dmxdev->lock);
 847                 dmxdevfilter->buffer.data = NULL;
 848                 spin_unlock_irq(&dmxdev->lock);
 849                 vfree(mem);
 850         }
 851
 852         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 853         wake_up(&dmxdevfilter->buffer.queue);
 854         mutex_unlock(&dmxdevfilter->mutex);
 855         mutex_unlock(&dmxdev->mutex);
 856         return 0;
 857 }
 858
 859 static inline void invert_mode(struct dmx_filter *filter)
 860 {
 861         int i;
 862
 863         for (i = 0; i < DMX_FILTER_SIZE; i++)
 864                 filter->mode[i] ^= 0xff;
 865 }
 866
 867 static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
 868                               struct dmxdev_filter *filter, u16 pid)
 869 {
 870         struct dmxdev_feed *feed;
 871
 872         if ((filter->type != DMXDEV_TYPE_PES) ||
 873             (filter->state < DMXDEV_STATE_SET))
 874                 return -EINVAL;
 875
 876         /* only TS packet filters may have multiple PIDs */
 877         if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
 878             (!list_empty(&filter->feed.ts)))
 879                 return -EINVAL;
 880
 881         feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
 882         if (feed == NULL)
 883                 return -ENOMEM;
 884
 885         feed->pid = pid;
 886         list_add(&feed->next, &filter->feed.ts);
 887
 888         if (filter->state >= DMXDEV_STATE_GO)
 889                 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
 890
 891         return 0;
 892 }
 893
 894 static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
 895                                   struct dmxdev_filter *filter, u16 pid)
 896 {
 897         struct dmxdev_feed *feed, *tmp;
 898
 899         if ((filter->type != DMXDEV_TYPE_PES) ||
 900             (filter->state < DMXDEV_STATE_SET))
 901                 return -EINVAL;
 902
 903         list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
 904                 if ((feed->pid == pid) && (feed->ts != NULL)) {
 905                         feed->ts->stop_filtering(feed->ts);
 906                         filter->dev->demux->release_ts_feed(filter->dev->demux,
 907                                                             feed->ts);
 908                         list_del(&feed->next);
 909                         kfree(feed);
 910                 }
 911         }
 912
 913         return 0;
 914 }
 915
 916 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 917                                  struct dmxdev_filter *dmxdevfilter,
 918                                  struct dmx_sct_filter_params *params)
 919 {
 920         dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
 921                 __func__, params->pid, params->flags, params->timeout);
 922
 923         dvb_dmxdev_filter_stop(dmxdevfilter);
 924
 925         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 926         memcpy(&dmxdevfilter->params.sec,
 927                params, sizeof(struct dmx_sct_filter_params));
 928         invert_mode(&dmxdevfilter->params.sec.filter);
 929         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 930
 931         if (params->flags & DMX_IMMEDIATE_START)
 932                 return dvb_dmxdev_filter_start(dmxdevfilter);
 933
 934         return 0;
 935 }
 936
 937 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 938                                      struct dmxdev_filter *dmxdevfilter,
 939                                      struct dmx_pes_filter_params *params)
 940 {
 941         int ret;
 942
 943         dvb_dmxdev_filter_stop(dmxdevfilter);
 944         dvb_dmxdev_filter_reset(dmxdevfilter);
 945
 946         if ((unsigned int)params->pes_type > DMX_PES_OTHER)
 947                 return -EINVAL;
 948
 949         dmxdevfilter->type = DMXDEV_TYPE_PES;
 950         memcpy(&dmxdevfilter->params, params,
 951                sizeof(struct dmx_pes_filter_params));
 952         INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
 953
 954         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 955
 956         ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
 957                                  dmxdevfilter->params.pes.pid);
 958         if (ret < 0)
 959                 return ret;
 960
 961         if (params->flags & DMX_IMMEDIATE_START)
 962                 return dvb_dmxdev_filter_start(dmxdevfilter);
 963
 964         return 0;
 965 }
 966
 967 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 968                                    struct file *file, char __user *buf,
 969                                    size_t count, loff_t *ppos)
 970 {
 971         int result, hcount;
 972         int done = 0;
 973
 974         if (dfil->todo <= 0) {
 975                 hcount = 3 + dfil->todo;
 976                 if (hcount > count)
 977                         hcount = count;
 978                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 979                                                 file->f_flags & O_NONBLOCK,
 980                                                 buf, hcount, ppos);
 981                 if (result < 0) {
 982                         dfil->todo = 0;
 983                         return result;
 984                 }
 985                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 986                         return -EFAULT;
 987                 buf += result;
 988                 done = result;
 989                 count -= result;
 990                 dfil->todo -= result;
 991                 if (dfil->todo > -3)
 992                         return done;
 993                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 994                 if (!count)
 995                         return done;
 996         }
 997         if (count > dfil->todo)
 998                 count = dfil->todo;
 999         result = dvb_dmxdev_buffer_read(&dfil->buffer,
1000                                         file->f_flags & O_NONBLOCK,
1001                                         buf, count, ppos);
1002         if (result < 0)
1003                 return result;
1004         dfil->todo -= result;
1005         return (result + done);
1006 }
1007
1008 static ssize_t
1009 dvb_demux_read(struct file *file, char __user *buf, size_t count,
1010                loff_t *ppos)
1011 {
1012         struct dmxdev_filter *dmxdevfilter = file->private_data;
1013         int ret;
1014
1015         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
1016                 return -ERESTARTSYS;
1017
1018         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
1019                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
1020         else
1021                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
1022                                              file->f_flags & O_NONBLOCK,
1023                                              buf, count, ppos);
1024
1025         mutex_unlock(&dmxdevfilter->mutex);
1026         return ret;
1027 }
1028
1029 static int dvb_demux_do_ioctl(struct file *file,
1030                               unsigned int cmd, void *parg)
1031 {
1032         struct dmxdev_filter *dmxdevfilter = file->private_data;
1033         struct dmxdev *dmxdev = dmxdevfilter->dev;
1034         unsigned long arg = (unsigned long)parg;
1035         int ret = 0;
1036
1037         if (mutex_lock_interruptible(&dmxdev->mutex))
1038                 return -ERESTARTSYS;
1039
1040         switch (cmd) {
1041         case DMX_START:
1042                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1043                         mutex_unlock(&dmxdev->mutex);
1044                         return -ERESTARTSYS;
1045                 }
1046                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
1047                         ret = -EINVAL;
1048                 else
1049                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
1050                 mutex_unlock(&dmxdevfilter->mutex);
1051                 break;
1052
1053         case DMX_STOP:
1054                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1055                         mutex_unlock(&dmxdev->mutex);
1056                         return -ERESTARTSYS;
1057                 }
1058                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
1059                 mutex_unlock(&dmxdevfilter->mutex);
1060                 break;
1061
1062         case DMX_SET_FILTER:
1063                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1064                         mutex_unlock(&dmxdev->mutex);
1065                         return -ERESTARTSYS;
1066                 }
1067                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
1068                 mutex_unlock(&dmxdevfilter->mutex);
1069                 break;
1070
1071         case DMX_SET_PES_FILTER:
1072                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1073                         mutex_unlock(&dmxdev->mutex);
1074                         return -ERESTARTSYS;
1075                 }
1076                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1077                 mutex_unlock(&dmxdevfilter->mutex);
1078                 break;
1079
1080         case DMX_SET_BUFFER_SIZE:
1081                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1082                         mutex_unlock(&dmxdev->mutex);
1083                         return -ERESTARTSYS;
1084                 }
1085                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1086                 mutex_unlock(&dmxdevfilter->mutex);
1087                 break;
1088
1089         case DMX_GET_PES_PIDS:
1090                 if (!dmxdev->demux->get_pes_pids) {
1091                         ret = -EINVAL;
1092                         break;
1093                 }
1094                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1095                 break;
1096
1097         case DMX_GET_STC:
1098                 if (!dmxdev->demux->get_stc) {
1099                         ret = -EINVAL;
1100                         break;
1101                 }
1102                 ret = dmxdev->demux->get_stc(dmxdev->demux,
1103                                              ((struct dmx_stc *)parg)->num,
1104                                              &((struct dmx_stc *)parg)->stc,
1105                                              &((struct dmx_stc *)parg)->base);
1106                 break;
1107
1108         case DMX_ADD_PID:
1109                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1110                         ret = -ERESTARTSYS;
1111                         break;
1112                 }
1113                 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1114                 mutex_unlock(&dmxdevfilter->mutex);
1115                 break;
1116
1117         case DMX_REMOVE_PID:
1118                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1119                         ret = -ERESTARTSYS;
1120                         break;
1121                 }
1122                 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1123                 mutex_unlock(&dmxdevfilter->mutex);
1124                 break;
1125
1126 #ifdef CONFIG_DVB_MMAP
1127         case DMX_REQBUFS:
1128                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1129                         mutex_unlock(&dmxdev->mutex);
1130                         return -ERESTARTSYS;
1131                 }
1132                 ret = dvb_vb2_reqbufs(&dmxdevfilter->vb2_ctx, parg);
1133                 mutex_unlock(&dmxdevfilter->mutex);
1134                 break;
1135
1136         case DMX_QUERYBUF:
1137                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1138                         mutex_unlock(&dmxdev->mutex);
1139                         return -ERESTARTSYS;
1140                 }
1141                 ret = dvb_vb2_querybuf(&dmxdevfilter->vb2_ctx, parg);
1142                 mutex_unlock(&dmxdevfilter->mutex);
1143                 break;
1144
1145         case DMX_EXPBUF:
1146                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1147                         mutex_unlock(&dmxdev->mutex);
1148                         return -ERESTARTSYS;
1149                 }
1150                 ret = dvb_vb2_expbuf(&dmxdevfilter->vb2_ctx, parg);
1151                 mutex_unlock(&dmxdevfilter->mutex);
1152                 break;
1153
1154         case DMX_QBUF:
1155                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1156                         mutex_unlock(&dmxdev->mutex);
1157                         return -ERESTARTSYS;
1158                 }
1159                 ret = dvb_vb2_qbuf(&dmxdevfilter->vb2_ctx, parg);
1160                 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1161                         ret = dvb_vb2_stream_on(&dmxdevfilter->vb2_ctx);
1162                 mutex_unlock(&dmxdevfilter->mutex);
1163                 break;
1164
1165         case DMX_DQBUF:
1166                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1167                         mutex_unlock(&dmxdev->mutex);
1168                         return -ERESTARTSYS;
1169                 }
1170                 ret = dvb_vb2_dqbuf(&dmxdevfilter->vb2_ctx, parg);
1171                 mutex_unlock(&dmxdevfilter->mutex);
1172                 break;
1173 #endif
1174         default:
1175                 ret = -ENOTTY;
1176                 break;
1177         }
1178         mutex_unlock(&dmxdev->mutex);
1179         return ret;
1180 }
1181
1182 static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1183                             unsigned long arg)
1184 {
1185         return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1186 }
1187
1188 static __poll_t dvb_demux_poll(struct file *file, poll_table *wait)
1189 {
1190         struct dmxdev_filter *dmxdevfilter = file->private_data;
1191         __poll_t mask = 0;
1192
1193         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1194
1195         if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
1196                 return EPOLLERR;
1197         if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1198                 return dvb_vb2_poll(&dmxdevfilter->vb2_ctx, file, wait);
1199
1200         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1201             dmxdevfilter->state != DMXDEV_STATE_DONE &&
1202             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1203                 return 0;
1204
1205         if (dmxdevfilter->buffer.error)
1206                 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);
1207
1208         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1209                 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
1210
1211         return mask;
1212 }
1213
1214 #ifdef CONFIG_DVB_MMAP
1215 static int dvb_demux_mmap(struct file *file, struct vm_area_struct *vma)
1216 {
1217         struct dmxdev_filter *dmxdevfilter = file->private_data;
1218         struct dmxdev *dmxdev = dmxdevfilter->dev;
1219         int ret;
1220
1221         if (!dmxdev->may_do_mmap)
1222                 return -ENOTTY;
1223
1224         if (mutex_lock_interruptible(&dmxdev->mutex))
1225                 return -ERESTARTSYS;
1226
1227         if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1228                 mutex_unlock(&dmxdev->mutex);
1229                 return -ERESTARTSYS;
1230         }
1231         ret = dvb_vb2_mmap(&dmxdevfilter->vb2_ctx, vma);
1232
1233         mutex_unlock(&dmxdevfilter->mutex);
1234         mutex_unlock(&dmxdev->mutex);
1235
1236         return ret;
1237 }
1238 #endif
1239
1240 static int dvb_demux_release(struct inode *inode, struct file *file)
1241 {
1242         struct dmxdev_filter *dmxdevfilter = file->private_data;
1243         struct dmxdev *dmxdev = dmxdevfilter->dev;
1244         int ret;
1245
1246         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1247
1248         mutex_lock(&dmxdev->mutex);
1249         dmxdev->dvbdev->users--;
1250         if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
1251                 mutex_unlock(&dmxdev->mutex);
1252                 wake_up(&dmxdev->dvbdev->wait_queue);
1253         } else
1254                 mutex_unlock(&dmxdev->mutex);
1255
1256         return ret;
1257 }
1258
1259 static const struct file_operations dvb_demux_fops = {
1260         .owner = THIS_MODULE,
1261         .read = dvb_demux_read,
1262         .unlocked_ioctl = dvb_demux_ioctl,
1263         .compat_ioctl = dvb_demux_ioctl,
1264         .open = dvb_demux_open,
1265         .release = dvb_demux_release,
1266         .poll = dvb_demux_poll,
1267         .llseek = default_llseek,
1268 #ifdef CONFIG_DVB_MMAP
1269         .mmap = dvb_demux_mmap,
1270 #endif
1271 };
1272
1273 static const struct dvb_device dvbdev_demux = {
1274         .priv = NULL,
1275         .users = 1,
1276         .writers = 1,
1277 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1278         .name = "dvb-demux",
1279 #endif
1280         .fops = &dvb_demux_fops
1281 };
1282
1283 static int dvb_dvr_do_ioctl(struct file *file,
1284                             unsigned int cmd, void *parg)
1285 {
1286         struct dvb_device *dvbdev = file->private_data;
1287         struct dmxdev *dmxdev = dvbdev->priv;
1288         unsigned long arg = (unsigned long)parg;
1289         int ret;
1290
1291         if (mutex_lock_interruptible(&dmxdev->mutex))
1292                 return -ERESTARTSYS;
1293
1294         switch (cmd) {
1295         case DMX_SET_BUFFER_SIZE:
1296                 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1297                 break;
1298
1299 #ifdef CONFIG_DVB_MMAP
1300         case DMX_REQBUFS:
1301                 ret = dvb_vb2_reqbufs(&dmxdev->dvr_vb2_ctx, parg);
1302                 break;
1303
1304         case DMX_QUERYBUF:
1305                 ret = dvb_vb2_querybuf(&dmxdev->dvr_vb2_ctx, parg);
1306                 break;
1307
1308         case DMX_EXPBUF:
1309                 ret = dvb_vb2_expbuf(&dmxdev->dvr_vb2_ctx, parg);
1310                 break;
1311
1312         case DMX_QBUF:
1313                 ret = dvb_vb2_qbuf(&dmxdev->dvr_vb2_ctx, parg);
1314                 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1315                         ret = dvb_vb2_stream_on(&dmxdev->dvr_vb2_ctx);
1316                 break;
1317
1318         case DMX_DQBUF:
1319                 ret = dvb_vb2_dqbuf(&dmxdev->dvr_vb2_ctx, parg);
1320                 break;
1321 #endif
1322         default:
1323                 ret = -ENOTTY;
1324                 break;
1325         }
1326         mutex_unlock(&dmxdev->mutex);
1327         return ret;
1328 }
1329
1330 static long dvb_dvr_ioctl(struct file *file,
1331                          unsigned int cmd, unsigned long arg)
1332 {
1333         return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1334 }
1335
1336 static __poll_t dvb_dvr_poll(struct file *file, poll_table *wait)
1337 {
1338         struct dvb_device *dvbdev = file->private_data;
1339         struct dmxdev *dmxdev = dvbdev->priv;
1340         __poll_t mask = 0;
1341
1342         dprintk("%s\n", __func__);
1343
1344         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1345
1346         if (dmxdev->exit)
1347                 return EPOLLERR;
1348         if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1349                 return dvb_vb2_poll(&dmxdev->dvr_vb2_ctx, file, wait);
1350
1351         if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||
1352             dmxdev->may_do_mmap) {
1353                 if (dmxdev->dvr_buffer.error)
1354                         mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);
1355
1356                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1357                         mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
1358         } else
1359                 mask |= (EPOLLOUT | EPOLLWRNORM | EPOLLPRI);
1360
1361         return mask;
1362 }
1363
1364 #ifdef CONFIG_DVB_MMAP
1365 static int dvb_dvr_mmap(struct file *file, struct vm_area_struct *vma)
1366 {
1367         struct dvb_device *dvbdev = file->private_data;
1368         struct dmxdev *dmxdev = dvbdev->priv;
1369         int ret;
1370
1371         if (!dmxdev->may_do_mmap)
1372                 return -ENOTTY;
1373
1374         if (dmxdev->exit)
1375                 return -ENODEV;
1376
1377         if (mutex_lock_interruptible(&dmxdev->mutex))
1378                 return -ERESTARTSYS;
1379
1380         ret = dvb_vb2_mmap(&dmxdev->dvr_vb2_ctx, vma);
1381         mutex_unlock(&dmxdev->mutex);
1382         return ret;
1383 }
1384 #endif
1385
1386 static const struct file_operations dvb_dvr_fops = {
1387         .owner = THIS_MODULE,
1388         .read = dvb_dvr_read,
1389         .write = dvb_dvr_write,
1390         .unlocked_ioctl = dvb_dvr_ioctl,
1391         .open = dvb_dvr_open,
1392         .release = dvb_dvr_release,
1393         .poll = dvb_dvr_poll,
1394         .llseek = default_llseek,
1395 #ifdef CONFIG_DVB_MMAP
1396         .mmap = dvb_dvr_mmap,
1397 #endif
1398 };
1399
1400 static const struct dvb_device dvbdev_dvr = {
1401         .priv = NULL,
1402         .readers = 1,
1403         .users = 1,
1404 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1405         .name = "dvb-dvr",
1406 #endif
1407         .fops = &dvb_dvr_fops
1408 };
1409 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1410 {
1411         int i, ret;
1412
1413         if (dmxdev->demux->open(dmxdev->demux) < 0)
1414                 return -EUSERS;
1415
1416         dmxdev->filter = vmalloc(array_size(sizeof(struct dmxdev_filter),
1417                                             dmxdev->filternum));
1418         if (!dmxdev->filter)
1419                 return -ENOMEM;
1420
1421         mutex_init(&dmxdev->mutex);
1422         spin_lock_init(&dmxdev->lock);
1423         for (i = 0; i < dmxdev->filternum; i++) {
1424                 dmxdev->filter[i].dev = dmxdev;
1425                 dmxdev->filter[i].buffer.data = NULL;
1426                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1427                                             DMXDEV_STATE_FREE);
1428         }
1429
1430         ret = dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1431                             DVB_DEVICE_DEMUX, dmxdev->filternum);
1432         if (ret < 0)
1433                 goto err_register_dvbdev;
1434
1435         ret = dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1436                             dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
1437         if (ret < 0)
1438                 goto err_register_dvr_dvbdev;
1439
1440         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1441
1442         return 0;
1443
1444 err_register_dvr_dvbdev:
1445         dvb_unregister_device(dmxdev->dvbdev);
1446 err_register_dvbdev:
1447         vfree(dmxdev->filter);
1448         dmxdev->filter = NULL;
1449         return ret;
1450 }
1451
1452 EXPORT_SYMBOL(dvb_dmxdev_init);
1453
1454 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1455 {
1456         mutex_lock(&dmxdev->mutex);
1457         dmxdev->exit = 1;
1458         mutex_unlock(&dmxdev->mutex);
1459
1460         if (dmxdev->dvbdev->users > 1) {
1461                 wait_event(dmxdev->dvbdev->wait_queue,
1462                                 dmxdev->dvbdev->users == 1);
1463         }
1464         if (dmxdev->dvr_dvbdev->users > 1) {
1465                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1466                                 dmxdev->dvr_dvbdev->users == 1);
1467         }
1468
1469         dvb_unregister_device(dmxdev->dvbdev);
1470         dvb_unregister_device(dmxdev->dvr_dvbdev);
1471
1472         vfree(dmxdev->filter);
1473         dmxdev->filter = NULL;
1474         dmxdev->demux->close(dmxdev->demux);
1475 }
1476
1477 EXPORT_SYMBOL(dvb_dmxdev_release);