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