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