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/moduleparam.h>
  28 #include <linux/poll.h>
  29 #include <linux/ioctl.h>
  30 #include <linux/wait.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/system.h>
  33 #include "dmxdev.h"
  34
  35 static int debug;
  36
  37 module_param(debug, int, 0644);
  38 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  39
  40 #define dprintk if (debug) printk
  41
  42 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
  43                                    const u8 *src, size_t len)
  44 {
  45         ssize_t free;
  46
  47         if (!len)
  48                 return 0;
  49         if (!buf->data)
  50                 return 0;
  51
  52         free = dvb_ringbuffer_free(buf);
  53         if (len > free) {
  54                 dprintk("dmxdev: buffer overflow\n");
  55                 return -EOVERFLOW;
  56         }
  57
  58         return dvb_ringbuffer_write(buf, src, len);
  59 }
  60
  61 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
  62                                       int non_blocking, char __user *buf,
  63                                       size_t count, loff_t *ppos)
  64 {
  65         size_t todo;
  66         ssize_t avail;
  67         ssize_t ret = 0;
  68
  69         if (!src->data)
  70                 return 0;
  71
  72         if (src->error) {
  73                 ret = src->error;
  74                 dvb_ringbuffer_flush(src);
  75                 return ret;
  76         }
  77
  78         for (todo = count; todo > 0; todo -= ret) {
  79                 if (non_blocking && dvb_ringbuffer_empty(src)) {
  80                         ret = -EWOULDBLOCK;
  81                         break;
  82                 }
  83
  84                 ret = wait_event_interruptible(src->queue,
  85                                                !dvb_ringbuffer_empty(src) ||
  86                                                (src->error != 0));
  87                 if (ret < 0)
  88                         break;
  89
  90                 if (src->error) {
  91                         ret = src->error;
  92                         dvb_ringbuffer_flush(src);
  93                         break;
  94                 }
  95
  96                 avail = dvb_ringbuffer_avail(src);
  97                 if (avail > todo)
  98                         avail = todo;
  99
 100                 ret = dvb_ringbuffer_read(src, buf, avail, 1);
 101                 if (ret < 0)
 102                         break;
 103
 104                 buf += ret;
 105         }
 106
 107         return (count - todo) ? (count - todo) : ret;
 108 }
 109
 110 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 111 {
 112         struct list_head *head, *pos;
 113
 114         head = demux->get_frontends(demux);
 115         if (!head)
 116                 return NULL;
 117         list_for_each(pos, head)
 118                 if (DMX_FE_ENTRY(pos)->source == type)
 119                         return DMX_FE_ENTRY(pos);
 120
 121         return NULL;
 122 }
 123
 124 static int dvb_dvr_open(struct inode *inode, struct file *file)
 125 {
 126         struct dvb_device *dvbdev = file->private_data;
 127         struct dmxdev *dmxdev = dvbdev->priv;
 128         struct dmx_frontend *front;
 129
 130         dprintk("function : %s\n", __FUNCTION__);
 131
 132         if (mutex_lock_interruptible(&dmxdev->mutex))
 133                 return -ERESTARTSYS;
 134
 135         if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 136                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 137                         mutex_unlock(&dmxdev->mutex);
 138                         return -EOPNOTSUPP;
 139                 }
 140         }
 141
 142         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 143                 void *mem;
 144                 if (!dvbdev->readers) {
 145                         mutex_unlock(&dmxdev->mutex);
 146                         return -EBUSY;
 147                 }
 148                 mem = vmalloc(DVR_BUFFER_SIZE);
 149                 if (!mem) {
 150                         mutex_unlock(&dmxdev->mutex);
 151                         return -ENOMEM;
 152                 }
 153                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 154                 dvbdev->readers--;
 155         }
 156
 157         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 158                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 159
 160                 if (!dmxdev->demux->write) {
 161                         mutex_unlock(&dmxdev->mutex);
 162                         return -EOPNOTSUPP;
 163                 }
 164
 165                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 166
 167                 if (!front) {
 168                         mutex_unlock(&dmxdev->mutex);
 169                         return -EINVAL;
 170                 }
 171                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 172                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 173         }
 174         mutex_unlock(&dmxdev->mutex);
 175         return 0;
 176 }
 177
 178 static int dvb_dvr_release(struct inode *inode, struct file *file)
 179 {
 180         struct dvb_device *dvbdev = file->private_data;
 181         struct dmxdev *dmxdev = dvbdev->priv;
 182
 183         if (mutex_lock_interruptible(&dmxdev->mutex))
 184                 return -ERESTARTSYS;
 185
 186         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 187                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 188                 dmxdev->demux->connect_frontend(dmxdev->demux,
 189                                                 dmxdev->dvr_orig_fe);
 190         }
 191         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 192                 dvbdev->readers++;
 193                 if (dmxdev->dvr_buffer.data) {
 194                         void *mem = dmxdev->dvr_buffer.data;
 195                         mb();
 196                         spin_lock_irq(&dmxdev->lock);
 197                         dmxdev->dvr_buffer.data = NULL;
 198                         spin_unlock_irq(&dmxdev->lock);
 199                         vfree(mem);
 200                 }
 201         }
 202         mutex_unlock(&dmxdev->mutex);
 203         return 0;
 204 }
 205
 206 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 207                              size_t count, loff_t *ppos)
 208 {
 209         struct dvb_device *dvbdev = file->private_data;
 210         struct dmxdev *dmxdev = dvbdev->priv;
 211         int ret;
 212
 213         if (!dmxdev->demux->write)
 214                 return -EOPNOTSUPP;
 215         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 216                 return -EINVAL;
 217         if (mutex_lock_interruptible(&dmxdev->mutex))
 218                 return -ERESTARTSYS;
 219         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 220         mutex_unlock(&dmxdev->mutex);
 221         return ret;
 222 }
 223
 224 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 225                             loff_t *ppos)
 226 {
 227         struct dvb_device *dvbdev = file->private_data;
 228         struct dmxdev *dmxdev = dvbdev->priv;
 229         int ret;
 230
 231         //mutex_lock(&dmxdev->mutex);
 232         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 233                                      file->f_flags & O_NONBLOCK,
 234                                      buf, count, ppos);
 235         //mutex_unlock(&dmxdev->mutex);
 236         return ret;
 237 }
 238
 239 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 240                                                *dmxdevfilter, int state)
 241 {
 242         spin_lock_irq(&dmxdevfilter->dev->lock);
 243         dmxdevfilter->state = state;
 244         spin_unlock_irq(&dmxdevfilter->dev->lock);
 245 }
 246
 247 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 248                                       unsigned long size)
 249 {
 250         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 251         void *mem;
 252
 253         if (buf->size == size)
 254                 return 0;
 255         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 256                 return -EBUSY;
 257         spin_lock_irq(&dmxdevfilter->dev->lock);
 258         mem = buf->data;
 259         buf->data = NULL;
 260         buf->size = size;
 261         dvb_ringbuffer_flush(buf);
 262         spin_unlock_irq(&dmxdevfilter->dev->lock);
 263         vfree(mem);
 264
 265         if (buf->size) {
 266                 mem = vmalloc(dmxdevfilter->buffer.size);
 267                 if (!mem)
 268                         return -ENOMEM;
 269                 spin_lock_irq(&dmxdevfilter->dev->lock);
 270                 buf->data = mem;
 271                 spin_unlock_irq(&dmxdevfilter->dev->lock);
 272         }
 273         return 0;
 274 }
 275
 276 static void dvb_dmxdev_filter_timeout(unsigned long data)
 277 {
 278         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 279
 280         dmxdevfilter->buffer.error = -ETIMEDOUT;
 281         spin_lock_irq(&dmxdevfilter->dev->lock);
 282         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 283         spin_unlock_irq(&dmxdevfilter->dev->lock);
 284         wake_up(&dmxdevfilter->buffer.queue);
 285 }
 286
 287 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 288 {
 289         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 290
 291         del_timer(&dmxdevfilter->timer);
 292         if (para->timeout) {
 293                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 294                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 295                 dmxdevfilter->timer.expires =
 296                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 297                 add_timer(&dmxdevfilter->timer);
 298         }
 299 }
 300
 301 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 302                                        const u8 *buffer2, size_t buffer2_len,
 303                                        struct dmx_section_filter *filter,
 304                                        enum dmx_success success)
 305 {
 306         struct dmxdev_filter *dmxdevfilter = filter->priv;
 307         int ret;
 308
 309         if (dmxdevfilter->buffer.error) {
 310                 wake_up(&dmxdevfilter->buffer.queue);
 311                 return 0;
 312         }
 313         spin_lock(&dmxdevfilter->dev->lock);
 314         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 315                 spin_unlock(&dmxdevfilter->dev->lock);
 316                 return 0;
 317         }
 318         del_timer(&dmxdevfilter->timer);
 319         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 320                 buffer1[0], buffer1[1],
 321                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 322         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 323                                       buffer1_len);
 324         if (ret == buffer1_len) {
 325                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 326                                               buffer2_len);
 327         }
 328         if (ret < 0) {
 329                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 330                 dmxdevfilter->buffer.error = ret;
 331         }
 332         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 333                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 334         spin_unlock(&dmxdevfilter->dev->lock);
 335         wake_up(&dmxdevfilter->buffer.queue);
 336         return 0;
 337 }
 338
 339 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 340                                   const u8 *buffer2, size_t buffer2_len,
 341                                   struct dmx_ts_feed *feed,
 342                                   enum dmx_success success)
 343 {
 344         struct dmxdev_filter *dmxdevfilter = feed->priv;
 345         struct dvb_ringbuffer *buffer;
 346         int ret;
 347
 348         spin_lock(&dmxdevfilter->dev->lock);
 349         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 350                 spin_unlock(&dmxdevfilter->dev->lock);
 351                 return 0;
 352         }
 353
 354         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP)
 355                 buffer = &dmxdevfilter->buffer;
 356         else
 357                 buffer = &dmxdevfilter->dev->dvr_buffer;
 358         if (buffer->error) {
 359                 spin_unlock(&dmxdevfilter->dev->lock);
 360                 wake_up(&buffer->queue);
 361                 return 0;
 362         }
 363         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 364         if (ret == buffer1_len)
 365                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 366         if (ret < 0) {
 367                 dvb_ringbuffer_flush(buffer);
 368                 buffer->error = ret;
 369         }
 370         spin_unlock(&dmxdevfilter->dev->lock);
 371         wake_up(&buffer->queue);
 372         return 0;
 373 }
 374
 375 /* stop feed but only mark the specified filter as stopped (state set) */
 376 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 377 {
 378         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 379
 380         switch (dmxdevfilter->type) {
 381         case DMXDEV_TYPE_SEC:
 382                 del_timer(&dmxdevfilter->timer);
 383                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 384                 break;
 385         case DMXDEV_TYPE_PES:
 386                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 387                 break;
 388         default:
 389                 return -EINVAL;
 390         }
 391         return 0;
 392 }
 393
 394 /* start feed associated with the specified filter */
 395 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 396 {
 397         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 398
 399         switch (filter->type) {
 400         case DMXDEV_TYPE_SEC:
 401                 return filter->feed.sec->start_filtering(filter->feed.sec);
 402         case DMXDEV_TYPE_PES:
 403                 return filter->feed.ts->start_filtering(filter->feed.ts);
 404         default:
 405                 return -EINVAL;
 406         }
 407
 408         return 0;
 409 }
 410
 411 /* restart section feed if it has filters left associated with it,
 412    otherwise release the feed */
 413 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 414 {
 415         int i;
 416         struct dmxdev *dmxdev = filter->dev;
 417         u16 pid = filter->params.sec.pid;
 418
 419         for (i = 0; i < dmxdev->filternum; i++)
 420                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 421                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 422                     dmxdev->filter[i].params.sec.pid == pid) {
 423                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 424                         return 0;
 425                 }
 426
 427         filter->dev->demux->release_section_feed(dmxdev->demux,
 428                                                  filter->feed.sec);
 429
 430         return 0;
 431 }
 432
 433 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 434 {
 435         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 436                 return 0;
 437
 438         switch (dmxdevfilter->type) {
 439         case DMXDEV_TYPE_SEC:
 440                 if (!dmxdevfilter->feed.sec)
 441                         break;
 442                 dvb_dmxdev_feed_stop(dmxdevfilter);
 443                 if (dmxdevfilter->filter.sec)
 444                         dmxdevfilter->feed.sec->
 445                             release_filter(dmxdevfilter->feed.sec,
 446                                            dmxdevfilter->filter.sec);
 447                 dvb_dmxdev_feed_restart(dmxdevfilter);
 448                 dmxdevfilter->feed.sec = NULL;
 449                 break;
 450         case DMXDEV_TYPE_PES:
 451                 if (!dmxdevfilter->feed.ts)
 452                         break;
 453                 dvb_dmxdev_feed_stop(dmxdevfilter);
 454                 dmxdevfilter->dev->demux->
 455                     release_ts_feed(dmxdevfilter->dev->demux,
 456                                     dmxdevfilter->feed.ts);
 457                 dmxdevfilter->feed.ts = NULL;
 458                 break;
 459         default:
 460                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 461                         return 0;
 462                 return -EINVAL;
 463         }
 464
 465         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 466         return 0;
 467 }
 468
 469 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 470 {
 471         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 472                 return 0;
 473
 474         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 475         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 476         return 0;
 477 }
 478
 479 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 480 {
 481         struct dmxdev *dmxdev = filter->dev;
 482         void *mem;
 483         int ret, i;
 484
 485         if (filter->state < DMXDEV_STATE_SET)
 486                 return -EINVAL;
 487
 488         if (filter->state >= DMXDEV_STATE_GO)
 489                 dvb_dmxdev_filter_stop(filter);
 490
 491         if (!filter->buffer.data) {
 492                 mem = vmalloc(filter->buffer.size);
 493                 if (!mem)
 494                         return -ENOMEM;
 495                 spin_lock_irq(&filter->dev->lock);
 496                 filter->buffer.data = mem;
 497                 spin_unlock_irq(&filter->dev->lock);
 498         }
 499
 500         dvb_ringbuffer_flush(&filter->buffer);
 501
 502         switch (filter->type) {
 503         case DMXDEV_TYPE_SEC:
 504         {
 505                 struct dmx_sct_filter_params *para = &filter->params.sec;
 506                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 507                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 508
 509                 *secfilter = NULL;
 510                 *secfeed = NULL;
 511
 512
 513                 /* find active filter/feed with same PID */
 514                 for (i = 0; i < dmxdev->filternum; i++) {
 515                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 516                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 517                             dmxdev->filter[i].params.sec.pid == para->pid) {
 518                                 *secfeed = dmxdev->filter[i].feed.sec;
 519                                 break;
 520                         }
 521                 }
 522
 523                 /* if no feed found, try to allocate new one */
 524                 if (!*secfeed) {
 525                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 526                                                                    secfeed,
 527                                                                    dvb_dmxdev_section_callback);
 528                         if (ret < 0) {
 529                                 printk("DVB (%s): could not alloc feed\n",
 530                                        __FUNCTION__);
 531                                 return ret;
 532                         }
 533
 534                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 535                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 536                         if (ret < 0) {
 537                                 printk("DVB (%s): could not set feed\n",
 538                                        __FUNCTION__);
 539                                 dvb_dmxdev_feed_restart(filter);
 540                                 return ret;
 541                         }
 542                 } else {
 543                         dvb_dmxdev_feed_stop(filter);
 544                 }
 545
 546                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 547                 if (ret < 0) {
 548                         dvb_dmxdev_feed_restart(filter);
 549                         filter->feed.sec->start_filtering(*secfeed);
 550                         dprintk("could not get filter\n");
 551                         return ret;
 552                 }
 553
 554                 (*secfilter)->priv = filter;
 555
 556                 memcpy(&((*secfilter)->filter_value[3]),
 557                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 558                 memcpy(&(*secfilter)->filter_mask[3],
 559                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 560                 memcpy(&(*secfilter)->filter_mode[3],
 561                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 562
 563                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 564                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 565                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 566                 (*secfilter)->filter_mask[1] = 0;
 567                 (*secfilter)->filter_mask[2] = 0;
 568
 569                 filter->todo = 0;
 570
 571                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 572                 if (ret < 0)
 573                         return ret;
 574
 575                 dvb_dmxdev_filter_timer(filter);
 576                 break;
 577         }
 578         case DMXDEV_TYPE_PES:
 579         {
 580                 struct timespec timeout = { 0 };
 581                 struct dmx_pes_filter_params *para = &filter->params.pes;
 582                 dmx_output_t otype;
 583                 int ret;
 584                 int ts_type;
 585                 enum dmx_ts_pes ts_pes;
 586                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 587
 588                 filter->feed.ts = NULL;
 589                 otype = para->output;
 590
 591                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 592
 593                 if (ts_pes < DMX_PES_OTHER)
 594                         ts_type = TS_DECODER;
 595                 else
 596                         ts_type = 0;
 597
 598                 if (otype == DMX_OUT_TS_TAP)
 599                         ts_type |= TS_PACKET;
 600
 601                 if (otype == DMX_OUT_TAP)
 602                         ts_type |= TS_PAYLOAD_ONLY | TS_PACKET;
 603
 604                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 605                                                       tsfeed,
 606                                                       dvb_dmxdev_ts_callback);
 607                 if (ret < 0)
 608                         return ret;
 609
 610                 (*tsfeed)->priv = filter;
 611
 612                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 613                                      32768, timeout);
 614                 if (ret < 0) {
 615                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 616                                                        *tsfeed);
 617                         return ret;
 618                 }
 619
 620                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 621                 if (ret < 0) {
 622                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 623                                                        *tsfeed);
 624                         return ret;
 625                 }
 626
 627                 break;
 628         }
 629         default:
 630                 return -EINVAL;
 631         }
 632
 633         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 634         return 0;
 635 }
 636
 637 static int dvb_demux_open(struct inode *inode, struct file *file)
 638 {
 639         struct dvb_device *dvbdev = file->private_data;
 640         struct dmxdev *dmxdev = dvbdev->priv;
 641         int i;
 642         struct dmxdev_filter *dmxdevfilter;
 643
 644         if (!dmxdev->filter)
 645                 return -EINVAL;
 646
 647         if (mutex_lock_interruptible(&dmxdev->mutex))
 648                 return -ERESTARTSYS;
 649
 650         for (i = 0; i < dmxdev->filternum; i++)
 651                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 652                         break;
 653
 654         if (i == dmxdev->filternum) {
 655                 mutex_unlock(&dmxdev->mutex);
 656                 return -EMFILE;
 657         }
 658
 659         dmxdevfilter = &dmxdev->filter[i];
 660         mutex_init(&dmxdevfilter->mutex);
 661         file->private_data = dmxdevfilter;
 662
 663         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 664         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 665         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 666         dmxdevfilter->feed.ts = NULL;
 667         init_timer(&dmxdevfilter->timer);
 668
 669         mutex_unlock(&dmxdev->mutex);
 670         return 0;
 671 }
 672
 673 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 674                                   struct dmxdev_filter *dmxdevfilter)
 675 {
 676         if (mutex_lock_interruptible(&dmxdev->mutex))
 677                 return -ERESTARTSYS;
 678
 679         if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 680                 mutex_unlock(&dmxdev->mutex);
 681                 return -ERESTARTSYS;
 682         }
 683
 684         dvb_dmxdev_filter_stop(dmxdevfilter);
 685         dvb_dmxdev_filter_reset(dmxdevfilter);
 686
 687         if (dmxdevfilter->buffer.data) {
 688                 void *mem = dmxdevfilter->buffer.data;
 689
 690                 spin_lock_irq(&dmxdev->lock);
 691                 dmxdevfilter->buffer.data = NULL;
 692                 spin_unlock_irq(&dmxdev->lock);
 693                 vfree(mem);
 694         }
 695
 696         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 697         wake_up(&dmxdevfilter->buffer.queue);
 698         mutex_unlock(&dmxdevfilter->mutex);
 699         mutex_unlock(&dmxdev->mutex);
 700         return 0;
 701 }
 702
 703 static inline void invert_mode(dmx_filter_t *filter)
 704 {
 705         int i;
 706
 707         for (i = 0; i < DMX_FILTER_SIZE; i++)
 708                 filter->mode[i] ^= 0xff;
 709 }
 710
 711 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 712                                  struct dmxdev_filter *dmxdevfilter,
 713                                  struct dmx_sct_filter_params *params)
 714 {
 715         dprintk("function : %s\n", __FUNCTION__);
 716
 717         dvb_dmxdev_filter_stop(dmxdevfilter);
 718
 719         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 720         memcpy(&dmxdevfilter->params.sec,
 721                params, sizeof(struct dmx_sct_filter_params));
 722         invert_mode(&dmxdevfilter->params.sec.filter);
 723         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 724
 725         if (params->flags & DMX_IMMEDIATE_START)
 726                 return dvb_dmxdev_filter_start(dmxdevfilter);
 727
 728         return 0;
 729 }
 730
 731 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 732                                      struct dmxdev_filter *dmxdevfilter,
 733                                      struct dmx_pes_filter_params *params)
 734 {
 735         dvb_dmxdev_filter_stop(dmxdevfilter);
 736
 737         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 738                 return -EINVAL;
 739
 740         dmxdevfilter->type = DMXDEV_TYPE_PES;
 741         memcpy(&dmxdevfilter->params, params,
 742                sizeof(struct dmx_pes_filter_params));
 743
 744         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 745
 746         if (params->flags & DMX_IMMEDIATE_START)
 747                 return dvb_dmxdev_filter_start(dmxdevfilter);
 748
 749         return 0;
 750 }
 751
 752 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 753                                    struct file *file, char __user *buf,
 754                                    size_t count, loff_t *ppos)
 755 {
 756         int result, hcount;
 757         int done = 0;
 758
 759         if (dfil->todo <= 0) {
 760                 hcount = 3 + dfil->todo;
 761                 if (hcount > count)
 762                         hcount = count;
 763                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 764                                                 file->f_flags & O_NONBLOCK,
 765                                                 buf, hcount, ppos);
 766                 if (result < 0) {
 767                         dfil->todo = 0;
 768                         return result;
 769                 }
 770                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 771                         return -EFAULT;
 772                 buf += result;
 773                 done = result;
 774                 count -= result;
 775                 dfil->todo -= result;
 776                 if (dfil->todo > -3)
 777                         return done;
 778                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 779                 if (!count)
 780                         return done;
 781         }
 782         if (count > dfil->todo)
 783                 count = dfil->todo;
 784         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 785                                         file->f_flags & O_NONBLOCK,
 786                                         buf, count, ppos);
 787         if (result < 0)
 788                 return result;
 789         dfil->todo -= result;
 790         return (result + done);
 791 }
 792
 793 static ssize_t
 794 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 795                loff_t *ppos)
 796 {
 797         struct dmxdev_filter *dmxdevfilter = file->private_data;
 798         int ret;
 799
 800         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 801                 return -ERESTARTSYS;
 802
 803         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 804                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 805         else
 806                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 807                                              file->f_flags & O_NONBLOCK,
 808                                              buf, count, ppos);
 809
 810         mutex_unlock(&dmxdevfilter->mutex);
 811         return ret;
 812 }
 813
 814 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 815                               unsigned int cmd, void *parg)
 816 {
 817         struct dmxdev_filter *dmxdevfilter = file->private_data;
 818         struct dmxdev *dmxdev = dmxdevfilter->dev;
 819         unsigned long arg = (unsigned long)parg;
 820         int ret = 0;
 821
 822         if (mutex_lock_interruptible(&dmxdev->mutex))
 823                 return -ERESTARTSYS;
 824
 825         switch (cmd) {
 826         case DMX_START:
 827                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 828                         mutex_unlock(&dmxdev->mutex);
 829                         return -ERESTARTSYS;
 830                 }
 831                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 832                         ret = -EINVAL;
 833                 else
 834                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 835                 mutex_unlock(&dmxdevfilter->mutex);
 836                 break;
 837
 838         case DMX_STOP:
 839                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 840                         mutex_unlock(&dmxdev->mutex);
 841                         return -ERESTARTSYS;
 842                 }
 843                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 844                 mutex_unlock(&dmxdevfilter->mutex);
 845                 break;
 846
 847         case DMX_SET_FILTER:
 848                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 849                         mutex_unlock(&dmxdev->mutex);
 850                         return -ERESTARTSYS;
 851                 }
 852                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 853                 mutex_unlock(&dmxdevfilter->mutex);
 854                 break;
 855
 856         case DMX_SET_PES_FILTER:
 857                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 858                         mutex_unlock(&dmxdev->mutex);
 859                         return -ERESTARTSYS;
 860                 }
 861                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 862                 mutex_unlock(&dmxdevfilter->mutex);
 863                 break;
 864
 865         case DMX_SET_BUFFER_SIZE:
 866                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 867                         mutex_unlock(&dmxdev->mutex);
 868                         return -ERESTARTSYS;
 869                 }
 870                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 871                 mutex_unlock(&dmxdevfilter->mutex);
 872                 break;
 873
 874         case DMX_GET_PES_PIDS:
 875                 if (!dmxdev->demux->get_pes_pids) {
 876                         ret = -EINVAL;
 877                         break;
 878                 }
 879                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 880                 break;
 881
 882         case DMX_GET_CAPS:
 883                 if (!dmxdev->demux->get_caps) {
 884                         ret = -EINVAL;
 885                         break;
 886                 }
 887                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 888                 break;
 889
 890         case DMX_SET_SOURCE:
 891                 if (!dmxdev->demux->set_source) {
 892                         ret = -EINVAL;
 893                         break;
 894                 }
 895                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 896                 break;
 897
 898         case DMX_GET_STC:
 899                 if (!dmxdev->demux->get_stc) {
 900                         ret = -EINVAL;
 901                         break;
 902                 }
 903                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 904                                              ((struct dmx_stc *)parg)->num,
 905                                              &((struct dmx_stc *)parg)->stc,
 906                                              &((struct dmx_stc *)parg)->base);
 907                 break;
 908
 909         default:
 910                 ret = -EINVAL;
 911                 break;
 912         }
 913         mutex_unlock(&dmxdev->mutex);
 914         return ret;
 915 }
 916
 917 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 918                            unsigned int cmd, unsigned long arg)
 919 {
 920         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 921 }
 922
 923 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 924 {
 925         struct dmxdev_filter *dmxdevfilter = file->private_data;
 926         unsigned int mask = 0;
 927
 928         if (!dmxdevfilter)
 929                 return -EINVAL;
 930
 931         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 932
 933         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 934             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 935             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 936                 return 0;
 937
 938         if (dmxdevfilter->buffer.error)
 939                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 940
 941         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
 942                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
 943
 944         return mask;
 945 }
 946
 947 static int dvb_demux_release(struct inode *inode, struct file *file)
 948 {
 949         struct dmxdev_filter *dmxdevfilter = file->private_data;
 950         struct dmxdev *dmxdev = dmxdevfilter->dev;
 951
 952         return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
 953 }
 954
 955 static struct file_operations dvb_demux_fops = {
 956         .owner = THIS_MODULE,
 957         .read = dvb_demux_read,
 958         .ioctl = dvb_demux_ioctl,
 959         .open = dvb_demux_open,
 960         .release = dvb_demux_release,
 961         .poll = dvb_demux_poll,
 962 };
 963
 964 static struct dvb_device dvbdev_demux = {
 965         .priv = NULL,
 966         .users = 1,
 967         .writers = 1,
 968         .fops = &dvb_demux_fops
 969 };
 970
 971 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
 972                             unsigned int cmd, void *parg)
 973 {
 974         struct dvb_device *dvbdev = file->private_data;
 975         struct dmxdev *dmxdev = dvbdev->priv;
 976         int ret;
 977
 978         if (mutex_lock_interruptible(&dmxdev->mutex))
 979                 return -ERESTARTSYS;
 980
 981         switch (cmd) {
 982         case DMX_SET_BUFFER_SIZE:
 983                 // FIXME: implement
 984                 ret = 0;
 985                 break;
 986
 987         default:
 988                 ret = -EINVAL;
 989                 break;
 990         }
 991         mutex_unlock(&dmxdev->mutex);
 992         return ret;
 993 }
 994
 995 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
 996                          unsigned int cmd, unsigned long arg)
 997 {
 998         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
 999 }
1000
1001 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1002 {
1003         struct dvb_device *dvbdev = file->private_data;
1004         struct dmxdev *dmxdev = dvbdev->priv;
1005         unsigned int mask = 0;
1006
1007         dprintk("function : %s\n", __FUNCTION__);
1008
1009         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1010
1011         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1012                 if (dmxdev->dvr_buffer.error)
1013                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1014
1015                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1016                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1017         } else
1018                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1019
1020         return mask;
1021 }
1022
1023 static struct file_operations dvb_dvr_fops = {
1024         .owner = THIS_MODULE,
1025         .read = dvb_dvr_read,
1026         .write = dvb_dvr_write,
1027         .ioctl = dvb_dvr_ioctl,
1028         .open = dvb_dvr_open,
1029         .release = dvb_dvr_release,
1030         .poll = dvb_dvr_poll,
1031 };
1032
1033 static struct dvb_device dvbdev_dvr = {
1034         .priv = NULL,
1035         .readers = 1,
1036         .fops = &dvb_dvr_fops
1037 };
1038
1039 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1040 {
1041         int i;
1042
1043         if (dmxdev->demux->open(dmxdev->demux) < 0)
1044                 return -EUSERS;
1045
1046         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1047         if (!dmxdev->filter)
1048                 return -ENOMEM;
1049
1050         mutex_init(&dmxdev->mutex);
1051         spin_lock_init(&dmxdev->lock);
1052         for (i = 0; i < dmxdev->filternum; i++) {
1053                 dmxdev->filter[i].dev = dmxdev;
1054                 dmxdev->filter[i].buffer.data = NULL;
1055                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1056                                             DMXDEV_STATE_FREE);
1057         }
1058
1059         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1060                             DVB_DEVICE_DEMUX);
1061         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1062                             dmxdev, DVB_DEVICE_DVR);
1063
1064         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1065
1066         return 0;
1067 }
1068
1069 EXPORT_SYMBOL(dvb_dmxdev_init);
1070
1071 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1072 {
1073         dvb_unregister_device(dmxdev->dvbdev);
1074         dvb_unregister_device(dmxdev->dvr_dvbdev);
1075
1076         vfree(dmxdev->filter);
1077         dmxdev->filter = NULL;
1078         dmxdev->demux->close(dmxdev->demux);
1079 }
1080
1081 EXPORT_SYMBOL(dvb_dmxdev_release);