SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         int ret;
 248
 249         if (dmxdev->exit) {
 250                 mutex_unlock(&dmxdev->mutex);
 251                 return -ENODEV;
 252         }
 253
 254         //mutex_lock(&dmxdev->mutex);
 255         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 256                                      file->f_flags & O_NONBLOCK,
 257                                      buf, count, ppos);
 258         //mutex_unlock(&dmxdev->mutex);
 259         return ret;
 260 }
 261
 262 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
 263                                       unsigned long size)
 264 {
 265         struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
 266         void *newmem;
 267         void *oldmem;
 268
 269         dprintk("function : %s\n", __func__);
 270
 271         if (buf->size == size)
 272                 return 0;
 273         if (!size)
 274                 return -EINVAL;
 275
 276         newmem = vmalloc(size);
 277         if (!newmem)
 278                 return -ENOMEM;
 279
 280         oldmem = buf->data;
 281
 282         spin_lock_irq(&dmxdev->lock);
 283         buf->data = newmem;
 284         buf->size = size;
 285
 286         /* reset and not flush in case the buffer shrinks */
 287         dvb_ringbuffer_reset(buf);
 288         spin_unlock_irq(&dmxdev->lock);
 289
 290         vfree(oldmem);
 291
 292         return 0;
 293 }
 294
 295 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 296                                                *dmxdevfilter, int state)
 297 {
 298         spin_lock_irq(&dmxdevfilter->dev->lock);
 299         dmxdevfilter->state = state;
 300         spin_unlock_irq(&dmxdevfilter->dev->lock);
 301 }
 302
 303 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 304                                       unsigned long size)
 305 {
 306         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 307         void *newmem;
 308         void *oldmem;
 309
 310         if (buf->size == size)
 311                 return 0;
 312         if (!size)
 313                 return -EINVAL;
 314         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 315                 return -EBUSY;
 316
 317         newmem = vmalloc(size);
 318         if (!newmem)
 319                 return -ENOMEM;
 320
 321         oldmem = buf->data;
 322
 323         spin_lock_irq(&dmxdevfilter->dev->lock);
 324         buf->data = newmem;
 325         buf->size = size;
 326
 327         /* reset and not flush in case the buffer shrinks */
 328         dvb_ringbuffer_reset(buf);
 329         spin_unlock_irq(&dmxdevfilter->dev->lock);
 330
 331         vfree(oldmem);
 332
 333         return 0;
 334 }
 335
 336 static void dvb_dmxdev_filter_timeout(unsigned long data)
 337 {
 338         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 339
 340         dmxdevfilter->buffer.error = -ETIMEDOUT;
 341         spin_lock_irq(&dmxdevfilter->dev->lock);
 342         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 343         spin_unlock_irq(&dmxdevfilter->dev->lock);
 344         wake_up(&dmxdevfilter->buffer.queue);
 345 }
 346
 347 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 348 {
 349         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 350
 351         del_timer(&dmxdevfilter->timer);
 352         if (para->timeout) {
 353                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 354                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 355                 dmxdevfilter->timer.expires =
 356                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 357                 add_timer(&dmxdevfilter->timer);
 358         }
 359 }
 360
 361 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 362                                        const u8 *buffer2, size_t buffer2_len,
 363                                        struct dmx_section_filter *filter,
 364                                        enum dmx_success success)
 365 {
 366         struct dmxdev_filter *dmxdevfilter = filter->priv;
 367         int ret;
 368
 369         if (dmxdevfilter->buffer.error) {
 370                 wake_up(&dmxdevfilter->buffer.queue);
 371                 return 0;
 372         }
 373         spin_lock(&dmxdevfilter->dev->lock);
 374         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 375                 spin_unlock(&dmxdevfilter->dev->lock);
 376                 return 0;
 377         }
 378         del_timer(&dmxdevfilter->timer);
 379         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 380                 buffer1[0], buffer1[1],
 381                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 382         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 383                                       buffer1_len);
 384         if (ret == buffer1_len) {
 385                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 386                                               buffer2_len);
 387         }
 388         if (ret < 0) {
 389                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 390                 dmxdevfilter->buffer.error = ret;
 391         }
 392         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 393                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 394         spin_unlock(&dmxdevfilter->dev->lock);
 395         wake_up(&dmxdevfilter->buffer.queue);
 396         return 0;
 397 }
 398
 399 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 400                                   const u8 *buffer2, size_t buffer2_len,
 401                                   struct dmx_ts_feed *feed,
 402                                   enum dmx_success success)
 403 {
 404         struct dmxdev_filter *dmxdevfilter = feed->priv;
 405         struct dvb_ringbuffer *buffer;
 406         int ret;
 407
 408         spin_lock(&dmxdevfilter->dev->lock);
 409         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 410                 spin_unlock(&dmxdevfilter->dev->lock);
 411                 return 0;
 412         }
 413
 414         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
 415             || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
 416                 buffer = &dmxdevfilter->buffer;
 417         else
 418                 buffer = &dmxdevfilter->dev->dvr_buffer;
 419         if (buffer->error) {
 420                 spin_unlock(&dmxdevfilter->dev->lock);
 421                 wake_up(&buffer->queue);
 422                 return 0;
 423         }
 424         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 425         if (ret == buffer1_len)
 426                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 427         if (ret < 0) {
 428                 dvb_ringbuffer_flush(buffer);
 429                 buffer->error = ret;
 430         }
 431         spin_unlock(&dmxdevfilter->dev->lock);
 432         wake_up(&buffer->queue);
 433         return 0;
 434 }
 435
 436 /* stop feed but only mark the specified filter as stopped (state set) */
 437 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 438 {
 439         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 440
 441         switch (dmxdevfilter->type) {
 442         case DMXDEV_TYPE_SEC:
 443                 del_timer(&dmxdevfilter->timer);
 444                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 445                 break;
 446         case DMXDEV_TYPE_PES:
 447                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 448                 break;
 449         default:
 450                 return -EINVAL;
 451         }
 452         return 0;
 453 }
 454
 455 /* start feed associated with the specified filter */
 456 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 457 {
 458         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 459
 460         switch (filter->type) {
 461         case DMXDEV_TYPE_SEC:
 462                 return filter->feed.sec->start_filtering(filter->feed.sec);
 463         case DMXDEV_TYPE_PES:
 464                 return filter->feed.ts->start_filtering(filter->feed.ts);
 465         default:
 466                 return -EINVAL;
 467         }
 468
 469         return 0;
 470 }
 471
 472 /* restart section feed if it has filters left associated with it,
 473    otherwise release the feed */
 474 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 475 {
 476         int i;
 477         struct dmxdev *dmxdev = filter->dev;
 478         u16 pid = filter->params.sec.pid;
 479
 480         for (i = 0; i < dmxdev->filternum; i++)
 481                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 482                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 483                     dmxdev->filter[i].params.sec.pid == pid) {
 484                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 485                         return 0;
 486                 }
 487
 488         filter->dev->demux->release_section_feed(dmxdev->demux,
 489                                                  filter->feed.sec);
 490
 491         return 0;
 492 }
 493
 494 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 495 {
 496         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 497                 return 0;
 498
 499         switch (dmxdevfilter->type) {
 500         case DMXDEV_TYPE_SEC:
 501                 if (!dmxdevfilter->feed.sec)
 502                         break;
 503                 dvb_dmxdev_feed_stop(dmxdevfilter);
 504                 if (dmxdevfilter->filter.sec)
 505                         dmxdevfilter->feed.sec->
 506                             release_filter(dmxdevfilter->feed.sec,
 507                                            dmxdevfilter->filter.sec);
 508                 dvb_dmxdev_feed_restart(dmxdevfilter);
 509                 dmxdevfilter->feed.sec = NULL;
 510                 break;
 511         case DMXDEV_TYPE_PES:
 512                 if (!dmxdevfilter->feed.ts)
 513                         break;
 514                 dvb_dmxdev_feed_stop(dmxdevfilter);
 515                 dmxdevfilter->dev->demux->
 516                     release_ts_feed(dmxdevfilter->dev->demux,
 517                                     dmxdevfilter->feed.ts);
 518                 dmxdevfilter->feed.ts = NULL;
 519                 break;
 520         default:
 521                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 522                         return 0;
 523                 return -EINVAL;
 524         }
 525
 526         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 527         return 0;
 528 }
 529
 530 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 531 {
 532         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 533                 return 0;
 534
 535         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 536         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 537         return 0;
 538 }
 539
 540 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 541 {
 542         struct dmxdev *dmxdev = filter->dev;
 543         void *mem;
 544         int ret, i;
 545
 546         if (filter->state < DMXDEV_STATE_SET)
 547                 return -EINVAL;
 548
 549         if (filter->state >= DMXDEV_STATE_GO)
 550                 dvb_dmxdev_filter_stop(filter);
 551
 552         if (!filter->buffer.data) {
 553                 mem = vmalloc(filter->buffer.size);
 554                 if (!mem)
 555                         return -ENOMEM;
 556                 spin_lock_irq(&filter->dev->lock);
 557                 filter->buffer.data = mem;
 558                 spin_unlock_irq(&filter->dev->lock);
 559         }
 560
 561         dvb_ringbuffer_flush(&filter->buffer);
 562
 563         switch (filter->type) {
 564         case DMXDEV_TYPE_SEC:
 565         {
 566                 struct dmx_sct_filter_params *para = &filter->params.sec;
 567                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 568                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 569
 570                 *secfilter = NULL;
 571                 *secfeed = NULL;
 572
 573
 574                 /* find active filter/feed with same PID */
 575                 for (i = 0; i < dmxdev->filternum; i++) {
 576                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 577                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 578                             dmxdev->filter[i].params.sec.pid == para->pid) {
 579                                 *secfeed = dmxdev->filter[i].feed.sec;
 580                                 break;
 581                         }
 582                 }
 583
 584                 /* if no feed found, try to allocate new one */
 585                 if (!*secfeed) {
 586                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 587                                                                    secfeed,
 588                                                                    dvb_dmxdev_section_callback);
 589                         if (ret < 0) {
 590                                 printk("DVB (%s): could not alloc feed\n",
 591                                        __func__);
 592                                 return ret;
 593                         }
 594
 595                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 596                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 597                         if (ret < 0) {
 598                                 printk("DVB (%s): could not set feed\n",
 599                                        __func__);
 600                                 dvb_dmxdev_feed_restart(filter);
 601                                 return ret;
 602                         }
 603                 } else {
 604                         dvb_dmxdev_feed_stop(filter);
 605                 }
 606
 607                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 608                 if (ret < 0) {
 609                         dvb_dmxdev_feed_restart(filter);
 610                         filter->feed.sec->start_filtering(*secfeed);
 611                         dprintk("could not get filter\n");
 612                         return ret;
 613                 }
 614
 615                 (*secfilter)->priv = filter;
 616
 617                 memcpy(&((*secfilter)->filter_value[3]),
 618                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 619                 memcpy(&(*secfilter)->filter_mask[3],
 620                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 621                 memcpy(&(*secfilter)->filter_mode[3],
 622                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 623
 624                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 625                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 626                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 627                 (*secfilter)->filter_mask[1] = 0;
 628                 (*secfilter)->filter_mask[2] = 0;
 629
 630                 filter->todo = 0;
 631
 632                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 633                 if (ret < 0)
 634                         return ret;
 635
 636                 dvb_dmxdev_filter_timer(filter);
 637                 break;
 638         }
 639         case DMXDEV_TYPE_PES:
 640         {
 641                 struct timespec timeout = { 0 };
 642                 struct dmx_pes_filter_params *para = &filter->params.pes;
 643                 dmx_output_t otype;
 644                 int ts_type;
 645                 enum dmx_ts_pes ts_pes;
 646                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 647
 648                 filter->feed.ts = NULL;
 649                 otype = para->output;
 650
 651                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 652
 653                 if (ts_pes < DMX_PES_OTHER)
 654                         ts_type = TS_DECODER;
 655                 else
 656                         ts_type = 0;
 657
 658                 if (otype == DMX_OUT_TS_TAP)
 659                         ts_type |= TS_PACKET;
 660                 else if (otype == DMX_OUT_TSDEMUX_TAP)
 661                         ts_type |= TS_PACKET | TS_DEMUX;
 662                 else if (otype == DMX_OUT_TAP)
 663                         ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 664
 665                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 666                                                       tsfeed,
 667                                                       dvb_dmxdev_ts_callback);
 668                 if (ret < 0)
 669                         return ret;
 670
 671                 (*tsfeed)->priv = filter;
 672
 673                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 674                                      32768, timeout);
 675                 if (ret < 0) {
 676                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 677                                                        *tsfeed);
 678                         return ret;
 679                 }
 680
 681                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 682                 if (ret < 0) {
 683                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 684                                                        *tsfeed);
 685                         return ret;
 686                 }
 687
 688                 break;
 689         }
 690         default:
 691                 return -EINVAL;
 692         }
 693
 694         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 695         return 0;
 696 }
 697
 698 static int dvb_demux_open(struct inode *inode, struct file *file)
 699 {
 700         struct dvb_device *dvbdev = file->private_data;
 701         struct dmxdev *dmxdev = dvbdev->priv;
 702         int i;
 703         struct dmxdev_filter *dmxdevfilter;
 704
 705         if (!dmxdev->filter)
 706                 return -EINVAL;
 707
 708         if (mutex_lock_interruptible(&dmxdev->mutex))
 709                 return -ERESTARTSYS;
 710
 711         for (i = 0; i < dmxdev->filternum; i++)
 712                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 713                         break;
 714
 715         if (i == dmxdev->filternum) {
 716                 mutex_unlock(&dmxdev->mutex);
 717                 return -EMFILE;
 718         }
 719
 720         dmxdevfilter = &dmxdev->filter[i];
 721         mutex_init(&dmxdevfilter->mutex);
 722         file->private_data = dmxdevfilter;
 723
 724         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 725         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 726         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 727         dmxdevfilter->feed.ts = NULL;
 728         init_timer(&dmxdevfilter->timer);
 729
 730         dvbdev->users++;
 731
 732         mutex_unlock(&dmxdev->mutex);
 733         return 0;
 734 }
 735
 736 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 737                                   struct dmxdev_filter *dmxdevfilter)
 738 {
 739         mutex_lock(&dmxdev->mutex);
 740         mutex_lock(&dmxdevfilter->mutex);
 741
 742         dvb_dmxdev_filter_stop(dmxdevfilter);
 743         dvb_dmxdev_filter_reset(dmxdevfilter);
 744
 745         if (dmxdevfilter->buffer.data) {
 746                 void *mem = dmxdevfilter->buffer.data;
 747
 748                 spin_lock_irq(&dmxdev->lock);
 749                 dmxdevfilter->buffer.data = NULL;
 750                 spin_unlock_irq(&dmxdev->lock);
 751                 vfree(mem);
 752         }
 753
 754         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 755         wake_up(&dmxdevfilter->buffer.queue);
 756         mutex_unlock(&dmxdevfilter->mutex);
 757         mutex_unlock(&dmxdev->mutex);
 758         return 0;
 759 }
 760
 761 static inline void invert_mode(dmx_filter_t *filter)
 762 {
 763         int i;
 764
 765         for (i = 0; i < DMX_FILTER_SIZE; i++)
 766                 filter->mode[i] ^= 0xff;
 767 }
 768
 769 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 770                                  struct dmxdev_filter *dmxdevfilter,
 771                                  struct dmx_sct_filter_params *params)
 772 {
 773         dprintk("function : %s\n", __func__);
 774
 775         dvb_dmxdev_filter_stop(dmxdevfilter);
 776
 777         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 778         memcpy(&dmxdevfilter->params.sec,
 779                params, sizeof(struct dmx_sct_filter_params));
 780         invert_mode(&dmxdevfilter->params.sec.filter);
 781         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 782
 783         if (params->flags & DMX_IMMEDIATE_START)
 784                 return dvb_dmxdev_filter_start(dmxdevfilter);
 785
 786         return 0;
 787 }
 788
 789 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 790                                      struct dmxdev_filter *dmxdevfilter,
 791                                      struct dmx_pes_filter_params *params)
 792 {
 793         dvb_dmxdev_filter_stop(dmxdevfilter);
 794
 795         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 796                 return -EINVAL;
 797
 798         dmxdevfilter->type = DMXDEV_TYPE_PES;
 799         memcpy(&dmxdevfilter->params, params,
 800                sizeof(struct dmx_pes_filter_params));
 801
 802         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 803
 804         if (params->flags & DMX_IMMEDIATE_START)
 805                 return dvb_dmxdev_filter_start(dmxdevfilter);
 806
 807         return 0;
 808 }
 809
 810 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 811                                    struct file *file, char __user *buf,
 812                                    size_t count, loff_t *ppos)
 813 {
 814         int result, hcount;
 815         int done = 0;
 816
 817         if (dfil->todo <= 0) {
 818                 hcount = 3 + dfil->todo;
 819                 if (hcount > count)
 820                         hcount = count;
 821                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 822                                                 file->f_flags & O_NONBLOCK,
 823                                                 buf, hcount, ppos);
 824                 if (result < 0) {
 825                         dfil->todo = 0;
 826                         return result;
 827                 }
 828                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 829                         return -EFAULT;
 830                 buf += result;
 831                 done = result;
 832                 count -= result;
 833                 dfil->todo -= result;
 834                 if (dfil->todo > -3)
 835                         return done;
 836                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 837                 if (!count)
 838                         return done;
 839         }
 840         if (count > dfil->todo)
 841                 count = dfil->todo;
 842         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 843                                         file->f_flags & O_NONBLOCK,
 844                                         buf, count, ppos);
 845         if (result < 0)
 846                 return result;
 847         dfil->todo -= result;
 848         return (result + done);
 849 }
 850
 851 static ssize_t
 852 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 853                loff_t *ppos)
 854 {
 855         struct dmxdev_filter *dmxdevfilter = file->private_data;
 856         int ret;
 857
 858         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 859                 return -ERESTARTSYS;
 860
 861         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 862                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 863         else
 864                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 865                                              file->f_flags & O_NONBLOCK,
 866                                              buf, count, ppos);
 867
 868         mutex_unlock(&dmxdevfilter->mutex);
 869         return ret;
 870 }
 871
 872 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 873                               unsigned int cmd, void *parg)
 874 {
 875         struct dmxdev_filter *dmxdevfilter = file->private_data;
 876         struct dmxdev *dmxdev = dmxdevfilter->dev;
 877         unsigned long arg = (unsigned long)parg;
 878         int ret = 0;
 879
 880         if (mutex_lock_interruptible(&dmxdev->mutex))
 881                 return -ERESTARTSYS;
 882
 883         switch (cmd) {
 884         case DMX_START:
 885                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 886                         mutex_unlock(&dmxdev->mutex);
 887                         return -ERESTARTSYS;
 888                 }
 889                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 890                         ret = -EINVAL;
 891                 else
 892                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 893                 mutex_unlock(&dmxdevfilter->mutex);
 894                 break;
 895
 896         case DMX_STOP:
 897                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 898                         mutex_unlock(&dmxdev->mutex);
 899                         return -ERESTARTSYS;
 900                 }
 901                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 902                 mutex_unlock(&dmxdevfilter->mutex);
 903                 break;
 904
 905         case DMX_SET_FILTER:
 906                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 907                         mutex_unlock(&dmxdev->mutex);
 908                         return -ERESTARTSYS;
 909                 }
 910                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 911                 mutex_unlock(&dmxdevfilter->mutex);
 912                 break;
 913
 914         case DMX_SET_PES_FILTER:
 915                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 916                         mutex_unlock(&dmxdev->mutex);
 917                         return -ERESTARTSYS;
 918                 }
 919                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 920                 mutex_unlock(&dmxdevfilter->mutex);
 921                 break;
 922
 923         case DMX_SET_BUFFER_SIZE:
 924                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 925                         mutex_unlock(&dmxdev->mutex);
 926                         return -ERESTARTSYS;
 927                 }
 928                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 929                 mutex_unlock(&dmxdevfilter->mutex);
 930                 break;
 931
 932         case DMX_GET_PES_PIDS:
 933                 if (!dmxdev->demux->get_pes_pids) {
 934                         ret = -EINVAL;
 935                         break;
 936                 }
 937                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 938                 break;
 939
 940         case DMX_GET_CAPS:
 941                 if (!dmxdev->demux->get_caps) {
 942                         ret = -EINVAL;
 943                         break;
 944                 }
 945                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 946                 break;
 947
 948         case DMX_SET_SOURCE:
 949                 if (!dmxdev->demux->set_source) {
 950                         ret = -EINVAL;
 951                         break;
 952                 }
 953                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 954                 break;
 955
 956         case DMX_GET_STC:
 957                 if (!dmxdev->demux->get_stc) {
 958                         ret = -EINVAL;
 959                         break;
 960                 }
 961                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 962                                              ((struct dmx_stc *)parg)->num,
 963                                              &((struct dmx_stc *)parg)->stc,
 964                                              &((struct dmx_stc *)parg)->base);
 965                 break;
 966
 967         default:
 968                 ret = -EINVAL;
 969                 break;
 970         }
 971         mutex_unlock(&dmxdev->mutex);
 972         return ret;
 973 }
 974
 975 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 976                            unsigned int cmd, unsigned long arg)
 977 {
 978         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 979 }
 980
 981 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 982 {
 983         struct dmxdev_filter *dmxdevfilter = file->private_data;
 984         unsigned int mask = 0;
 985
 986         if (!dmxdevfilter)
 987                 return -EINVAL;
 988
 989         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 990
 991         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 992             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 993             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 994                 return 0;
 995
 996         if (dmxdevfilter->buffer.error)
 997                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 998
 999         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1000                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1001
1002         return mask;
1003 }
1004
1005 static int dvb_demux_release(struct inode *inode, struct file *file)
1006 {
1007         struct dmxdev_filter *dmxdevfilter = file->private_data;
1008         struct dmxdev *dmxdev = dmxdevfilter->dev;
1009
1010         int ret;
1011
1012         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1013
1014         mutex_lock(&dmxdev->mutex);
1015         dmxdev->dvbdev->users--;
1016         if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
1017                 fops_put(file->f_op);
1018                 file->f_op = NULL;
1019                 mutex_unlock(&dmxdev->mutex);
1020                 wake_up(&dmxdev->dvbdev->wait_queue);
1021         } else
1022                 mutex_unlock(&dmxdev->mutex);
1023
1024         return ret;
1025 }
1026
1027 static struct file_operations dvb_demux_fops = {
1028         .owner = THIS_MODULE,
1029         .read = dvb_demux_read,
1030         .ioctl = dvb_demux_ioctl,
1031         .open = dvb_demux_open,
1032         .release = dvb_demux_release,
1033         .poll = dvb_demux_poll,
1034 };
1035
1036 static struct dvb_device dvbdev_demux = {
1037         .priv = NULL,
1038         .users = 1,
1039         .writers = 1,
1040         .fops = &dvb_demux_fops
1041 };
1042
1043 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1044                             unsigned int cmd, void *parg)
1045 {
1046         struct dvb_device *dvbdev = file->private_data;
1047         struct dmxdev *dmxdev = dvbdev->priv;
1048         unsigned long arg = (unsigned long)parg;
1049         int ret;
1050
1051         if (mutex_lock_interruptible(&dmxdev->mutex))
1052                 return -ERESTARTSYS;
1053
1054         switch (cmd) {
1055         case DMX_SET_BUFFER_SIZE:
1056                 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1057                 break;
1058
1059         default:
1060                 ret = -EINVAL;
1061                 break;
1062         }
1063         mutex_unlock(&dmxdev->mutex);
1064         return ret;
1065 }
1066
1067 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1068                          unsigned int cmd, unsigned long arg)
1069 {
1070         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1071 }
1072
1073 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1074 {
1075         struct dvb_device *dvbdev = file->private_data;
1076         struct dmxdev *dmxdev = dvbdev->priv;
1077         unsigned int mask = 0;
1078
1079         dprintk("function : %s\n", __func__);
1080
1081         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1082
1083         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1084                 if (dmxdev->dvr_buffer.error)
1085                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1086
1087                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1088                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1089         } else
1090                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1091
1092         return mask;
1093 }
1094
1095 static struct file_operations dvb_dvr_fops = {
1096         .owner = THIS_MODULE,
1097         .read = dvb_dvr_read,
1098         .write = dvb_dvr_write,
1099         .ioctl = dvb_dvr_ioctl,
1100         .open = dvb_dvr_open,
1101         .release = dvb_dvr_release,
1102         .poll = dvb_dvr_poll,
1103 };
1104
1105 static struct dvb_device dvbdev_dvr = {
1106         .priv = NULL,
1107         .readers = 1,
1108         .users = 1,
1109         .fops = &dvb_dvr_fops
1110 };
1111
1112 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1113 {
1114         int i;
1115
1116         if (dmxdev->demux->open(dmxdev->demux) < 0)
1117                 return -EUSERS;
1118
1119         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1120         if (!dmxdev->filter)
1121                 return -ENOMEM;
1122
1123         mutex_init(&dmxdev->mutex);
1124         spin_lock_init(&dmxdev->lock);
1125         for (i = 0; i < dmxdev->filternum; i++) {
1126                 dmxdev->filter[i].dev = dmxdev;
1127                 dmxdev->filter[i].buffer.data = NULL;
1128                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1129                                             DMXDEV_STATE_FREE);
1130         }
1131
1132         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1133                             DVB_DEVICE_DEMUX);
1134         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1135                             dmxdev, DVB_DEVICE_DVR);
1136
1137         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1138
1139         return 0;
1140 }
1141
1142 EXPORT_SYMBOL(dvb_dmxdev_init);
1143
1144 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1145 {
1146         dmxdev->exit=1;
1147         if (dmxdev->dvbdev->users > 1) {
1148                 wait_event(dmxdev->dvbdev->wait_queue,
1149                                 dmxdev->dvbdev->users==1);
1150         }
1151         if (dmxdev->dvr_dvbdev->users > 1) {
1152                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1153                                 dmxdev->dvr_dvbdev->users==1);
1154         }
1155
1156         dvb_unregister_device(dmxdev->dvbdev);
1157         dvb_unregister_device(dmxdev->dvr_dvbdev);
1158
1159         vfree(dmxdev->filter);
1160         dmxdev->filter = NULL;
1161         dmxdev->demux->close(dmxdev->demux);
1162 }
1163
1164 EXPORT_SYMBOL(dvb_dmxdev_release);