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;
 145                 if (!dvbdev->readers) {
 146                         mutex_unlock(&dmxdev->mutex);
 147                         return -EBUSY;
 148                 }
 149                 mem = vmalloc(DVR_BUFFER_SIZE);
 150                 if (!mem) {
 151                         mutex_unlock(&dmxdev->mutex);
 152                         return -ENOMEM;
 153                 }
 154                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 155                 dvbdev->readers--;
 156         }
 157
 158         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 159                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 160
 161                 if (!dmxdev->demux->write) {
 162                         mutex_unlock(&dmxdev->mutex);
 163                         return -EOPNOTSUPP;
 164                 }
 165
 166                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 167
 168                 if (!front) {
 169                         mutex_unlock(&dmxdev->mutex);
 170                         return -EINVAL;
 171                 }
 172                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 173                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 174         }
 175         mutex_unlock(&dmxdev->mutex);
 176         return 0;
 177 }
 178
 179 static int dvb_dvr_release(struct inode *inode, struct file *file)
 180 {
 181         struct dvb_device *dvbdev = file->private_data;
 182         struct dmxdev *dmxdev = dvbdev->priv;
 183
 184         mutex_lock(&dmxdev->mutex);
 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         mutex_lock(&dmxdev->mutex);
 677         mutex_lock(&dmxdevfilter->mutex);
 678
 679         dvb_dmxdev_filter_stop(dmxdevfilter);
 680         dvb_dmxdev_filter_reset(dmxdevfilter);
 681
 682         if (dmxdevfilter->buffer.data) {
 683                 void *mem = dmxdevfilter->buffer.data;
 684
 685                 spin_lock_irq(&dmxdev->lock);
 686                 dmxdevfilter->buffer.data = NULL;
 687                 spin_unlock_irq(&dmxdev->lock);
 688                 vfree(mem);
 689         }
 690
 691         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 692         wake_up(&dmxdevfilter->buffer.queue);
 693         mutex_unlock(&dmxdevfilter->mutex);
 694         mutex_unlock(&dmxdev->mutex);
 695         return 0;
 696 }
 697
 698 static inline void invert_mode(dmx_filter_t *filter)
 699 {
 700         int i;
 701
 702         for (i = 0; i < DMX_FILTER_SIZE; i++)
 703                 filter->mode[i] ^= 0xff;
 704 }
 705
 706 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 707                                  struct dmxdev_filter *dmxdevfilter,
 708                                  struct dmx_sct_filter_params *params)
 709 {
 710         dprintk("function : %s\n", __FUNCTION__);
 711
 712         dvb_dmxdev_filter_stop(dmxdevfilter);
 713
 714         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 715         memcpy(&dmxdevfilter->params.sec,
 716                params, sizeof(struct dmx_sct_filter_params));
 717         invert_mode(&dmxdevfilter->params.sec.filter);
 718         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 719
 720         if (params->flags & DMX_IMMEDIATE_START)
 721                 return dvb_dmxdev_filter_start(dmxdevfilter);
 722
 723         return 0;
 724 }
 725
 726 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 727                                      struct dmxdev_filter *dmxdevfilter,
 728                                      struct dmx_pes_filter_params *params)
 729 {
 730         dvb_dmxdev_filter_stop(dmxdevfilter);
 731
 732         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 733                 return -EINVAL;
 734
 735         dmxdevfilter->type = DMXDEV_TYPE_PES;
 736         memcpy(&dmxdevfilter->params, params,
 737                sizeof(struct dmx_pes_filter_params));
 738
 739         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 740
 741         if (params->flags & DMX_IMMEDIATE_START)
 742                 return dvb_dmxdev_filter_start(dmxdevfilter);
 743
 744         return 0;
 745 }
 746
 747 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 748                                    struct file *file, char __user *buf,
 749                                    size_t count, loff_t *ppos)
 750 {
 751         int result, hcount;
 752         int done = 0;
 753
 754         if (dfil->todo <= 0) {
 755                 hcount = 3 + dfil->todo;
 756                 if (hcount > count)
 757                         hcount = count;
 758                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 759                                                 file->f_flags & O_NONBLOCK,
 760                                                 buf, hcount, ppos);
 761                 if (result < 0) {
 762                         dfil->todo = 0;
 763                         return result;
 764                 }
 765                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 766                         return -EFAULT;
 767                 buf += result;
 768                 done = result;
 769                 count -= result;
 770                 dfil->todo -= result;
 771                 if (dfil->todo > -3)
 772                         return done;
 773                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 774                 if (!count)
 775                         return done;
 776         }
 777         if (count > dfil->todo)
 778                 count = dfil->todo;
 779         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 780                                         file->f_flags & O_NONBLOCK,
 781                                         buf, count, ppos);
 782         if (result < 0)
 783                 return result;
 784         dfil->todo -= result;
 785         return (result + done);
 786 }
 787
 788 static ssize_t
 789 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 790                loff_t *ppos)
 791 {
 792         struct dmxdev_filter *dmxdevfilter = file->private_data;
 793         int ret;
 794
 795         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 796                 return -ERESTARTSYS;
 797
 798         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 799                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 800         else
 801                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 802                                              file->f_flags & O_NONBLOCK,
 803                                              buf, count, ppos);
 804
 805         mutex_unlock(&dmxdevfilter->mutex);
 806         return ret;
 807 }
 808
 809 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 810                               unsigned int cmd, void *parg)
 811 {
 812         struct dmxdev_filter *dmxdevfilter = file->private_data;
 813         struct dmxdev *dmxdev = dmxdevfilter->dev;
 814         unsigned long arg = (unsigned long)parg;
 815         int ret = 0;
 816
 817         if (mutex_lock_interruptible(&dmxdev->mutex))
 818                 return -ERESTARTSYS;
 819
 820         switch (cmd) {
 821         case DMX_START:
 822                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 823                         mutex_unlock(&dmxdev->mutex);
 824                         return -ERESTARTSYS;
 825                 }
 826                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 827                         ret = -EINVAL;
 828                 else
 829                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 830                 mutex_unlock(&dmxdevfilter->mutex);
 831                 break;
 832
 833         case DMX_STOP:
 834                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 835                         mutex_unlock(&dmxdev->mutex);
 836                         return -ERESTARTSYS;
 837                 }
 838                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 839                 mutex_unlock(&dmxdevfilter->mutex);
 840                 break;
 841
 842         case DMX_SET_FILTER:
 843                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 844                         mutex_unlock(&dmxdev->mutex);
 845                         return -ERESTARTSYS;
 846                 }
 847                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 848                 mutex_unlock(&dmxdevfilter->mutex);
 849                 break;
 850
 851         case DMX_SET_PES_FILTER:
 852                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 853                         mutex_unlock(&dmxdev->mutex);
 854                         return -ERESTARTSYS;
 855                 }
 856                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 857                 mutex_unlock(&dmxdevfilter->mutex);
 858                 break;
 859
 860         case DMX_SET_BUFFER_SIZE:
 861                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 862                         mutex_unlock(&dmxdev->mutex);
 863                         return -ERESTARTSYS;
 864                 }
 865                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 866                 mutex_unlock(&dmxdevfilter->mutex);
 867                 break;
 868
 869         case DMX_GET_PES_PIDS:
 870                 if (!dmxdev->demux->get_pes_pids) {
 871                         ret = -EINVAL;
 872                         break;
 873                 }
 874                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 875                 break;
 876
 877         case DMX_GET_CAPS:
 878                 if (!dmxdev->demux->get_caps) {
 879                         ret = -EINVAL;
 880                         break;
 881                 }
 882                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 883                 break;
 884
 885         case DMX_SET_SOURCE:
 886                 if (!dmxdev->demux->set_source) {
 887                         ret = -EINVAL;
 888                         break;
 889                 }
 890                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 891                 break;
 892
 893         case DMX_GET_STC:
 894                 if (!dmxdev->demux->get_stc) {
 895                         ret = -EINVAL;
 896                         break;
 897                 }
 898                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 899                                              ((struct dmx_stc *)parg)->num,
 900                                              &((struct dmx_stc *)parg)->stc,
 901                                              &((struct dmx_stc *)parg)->base);
 902                 break;
 903
 904         default:
 905                 ret = -EINVAL;
 906                 break;
 907         }
 908         mutex_unlock(&dmxdev->mutex);
 909         return ret;
 910 }
 911
 912 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 913                            unsigned int cmd, unsigned long arg)
 914 {
 915         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 916 }
 917
 918 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 919 {
 920         struct dmxdev_filter *dmxdevfilter = file->private_data;
 921         unsigned int mask = 0;
 922
 923         if (!dmxdevfilter)
 924                 return -EINVAL;
 925
 926         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 927
 928         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 929             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 930             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 931                 return 0;
 932
 933         if (dmxdevfilter->buffer.error)
 934                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 935
 936         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
 937                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
 938
 939         return mask;
 940 }
 941
 942 static int dvb_demux_release(struct inode *inode, struct file *file)
 943 {
 944         struct dmxdev_filter *dmxdevfilter = file->private_data;
 945         struct dmxdev *dmxdev = dmxdevfilter->dev;
 946
 947         return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
 948 }
 949
 950 static struct file_operations dvb_demux_fops = {
 951         .owner = THIS_MODULE,
 952         .read = dvb_demux_read,
 953         .ioctl = dvb_demux_ioctl,
 954         .open = dvb_demux_open,
 955         .release = dvb_demux_release,
 956         .poll = dvb_demux_poll,
 957 };
 958
 959 static struct dvb_device dvbdev_demux = {
 960         .priv = NULL,
 961         .users = 1,
 962         .writers = 1,
 963         .fops = &dvb_demux_fops
 964 };
 965
 966 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
 967                             unsigned int cmd, void *parg)
 968 {
 969         struct dvb_device *dvbdev = file->private_data;
 970         struct dmxdev *dmxdev = dvbdev->priv;
 971         int ret;
 972
 973         if (mutex_lock_interruptible(&dmxdev->mutex))
 974                 return -ERESTARTSYS;
 975
 976         switch (cmd) {
 977         case DMX_SET_BUFFER_SIZE:
 978                 // FIXME: implement
 979                 ret = 0;
 980                 break;
 981
 982         default:
 983                 ret = -EINVAL;
 984                 break;
 985         }
 986         mutex_unlock(&dmxdev->mutex);
 987         return ret;
 988 }
 989
 990 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
 991                          unsigned int cmd, unsigned long arg)
 992 {
 993         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
 994 }
 995
 996 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
 997 {
 998         struct dvb_device *dvbdev = file->private_data;
 999         struct dmxdev *dmxdev = dvbdev->priv;
1000         unsigned int mask = 0;
1001
1002         dprintk("function : %s\n", __FUNCTION__);
1003
1004         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1005
1006         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1007                 if (dmxdev->dvr_buffer.error)
1008                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1009
1010                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1011                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1012         } else
1013                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1014
1015         return mask;
1016 }
1017
1018 static struct file_operations dvb_dvr_fops = {
1019         .owner = THIS_MODULE,
1020         .read = dvb_dvr_read,
1021         .write = dvb_dvr_write,
1022         .ioctl = dvb_dvr_ioctl,
1023         .open = dvb_dvr_open,
1024         .release = dvb_dvr_release,
1025         .poll = dvb_dvr_poll,
1026 };
1027
1028 static struct dvb_device dvbdev_dvr = {
1029         .priv = NULL,
1030         .readers = 1,
1031         .fops = &dvb_dvr_fops
1032 };
1033
1034 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1035 {
1036         int i;
1037
1038         if (dmxdev->demux->open(dmxdev->demux) < 0)
1039                 return -EUSERS;
1040
1041         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1042         if (!dmxdev->filter)
1043                 return -ENOMEM;
1044
1045         mutex_init(&dmxdev->mutex);
1046         spin_lock_init(&dmxdev->lock);
1047         for (i = 0; i < dmxdev->filternum; i++) {
1048                 dmxdev->filter[i].dev = dmxdev;
1049                 dmxdev->filter[i].buffer.data = NULL;
1050                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1051                                             DMXDEV_STATE_FREE);
1052         }
1053
1054         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1055                             DVB_DEVICE_DEMUX);
1056         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1057                             dmxdev, DVB_DEVICE_DVR);
1058
1059         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1060
1061         return 0;
1062 }
1063
1064 EXPORT_SYMBOL(dvb_dmxdev_init);
1065
1066 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1067 {
1068         dvb_unregister_device(dmxdev->dvbdev);
1069         dvb_unregister_device(dmxdev->dvr_dvbdev);
1070
1071         vfree(dmxdev->filter);
1072         dmxdev->filter = NULL;
1073         dmxdev->demux->close(dmxdev->demux);
1074 }
1075
1076 EXPORT_SYMBOL(dvb_dmxdev_release);