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