SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/dvb/dvb-core/dmxdev.c

   1 /*
   2  * dmxdev.c - DVB demultiplexer device
   3  *
   4  * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
   5  *                    for convergence integrated media GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public License
   9  * as published by the Free Software Foundation; either version 2.1
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  */
  22
  23 #include <linux/spinlock.h>
  24 #include <linux/slab.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/module.h>
  27 #include <linux/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 inline void dvb_dmxdev_buffer_init(struct dmxdev_buffer *buffer)
  44 {
  45         buffer->data = NULL;
  46         buffer->size = 8192;
  47         buffer->pread = 0;
  48         buffer->pwrite = 0;
  49         buffer->error = 0;
  50         init_waitqueue_head(&buffer->queue);
  51 }
  52
  53 static inline int dvb_dmxdev_buffer_write(struct dmxdev_buffer *buf,
  54                                           const u8 *src, int len)
  55 {
  56         int split;
  57         int free;
  58         int todo;
  59
  60         if (!len)
  61                 return 0;
  62         if (!buf->data)
  63                 return 0;
  64
  65         free = buf->pread - buf->pwrite;
  66         split = 0;
  67         if (free <= 0) {
  68                 free += buf->size;
  69                 split = buf->size - buf->pwrite;
  70         }
  71         if (len >= free) {
  72                 dprintk("dmxdev: buffer overflow\n");
  73                 return -1;
  74         }
  75         if (split >= len)
  76                 split = 0;
  77         todo = len;
  78         if (split) {
  79                 memcpy(buf->data + buf->pwrite, src, split);
  80                 todo -= split;
  81                 buf->pwrite = 0;
  82         }
  83         memcpy(buf->data + buf->pwrite, src + split, todo);
  84         buf->pwrite = (buf->pwrite + todo) % buf->size;
  85         return len;
  86 }
  87
  88 static ssize_t dvb_dmxdev_buffer_read(struct dmxdev_buffer *src,
  89                                       int non_blocking, char __user *buf,
  90                                       size_t count, loff_t *ppos)
  91 {
  92         unsigned long todo = count;
  93         int split, avail, error;
  94
  95         if (!src->data)
  96                 return 0;
  97
  98         if ((error = src->error)) {
  99                 src->pwrite = src->pread;
 100                 src->error = 0;
 101                 return error;
 102         }
 103
 104         if (non_blocking && (src->pwrite == src->pread))
 105                 return -EWOULDBLOCK;
 106
 107         while (todo > 0) {
 108                 if (non_blocking && (src->pwrite == src->pread))
 109                         return (count - todo) ? (count - todo) : -EWOULDBLOCK;
 110
 111                 if (wait_event_interruptible(src->queue,
 112                                              (src->pread != src->pwrite) ||
 113                                              (src->error)) < 0)
 114                         return count - todo;
 115
 116                 if ((error = src->error)) {
 117                         src->pwrite = src->pread;
 118                         src->error = 0;
 119                         return error;
 120                 }
 121
 122                 split = src->size;
 123                 avail = src->pwrite - src->pread;
 124                 if (avail < 0) {
 125                         avail += src->size;
 126                         split = src->size - src->pread;
 127                 }
 128                 if (avail > todo)
 129                         avail = todo;
 130                 if (split < avail) {
 131                         if (copy_to_user(buf, src->data + src->pread, split))
 132                                 return -EFAULT;
 133                         buf += split;
 134                         src->pread = 0;
 135                         todo -= split;
 136                         avail -= split;
 137                 }
 138                 if (avail) {
 139                         if (copy_to_user(buf, src->data + src->pread, avail))
 140                                 return -EFAULT;
 141                         src->pread = (src->pread + avail) % src->size;
 142                         todo -= avail;
 143                         buf += avail;
 144                 }
 145         }
 146         return count;
 147 }
 148
 149 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 150 {
 151         struct list_head *head, *pos;
 152
 153         head = demux->get_frontends(demux);
 154         if (!head)
 155                 return NULL;
 156         list_for_each(pos, head)
 157                 if (DMX_FE_ENTRY(pos)->source == type)
 158                         return DMX_FE_ENTRY(pos);
 159
 160         return NULL;
 161 }
 162
 163 static int dvb_dvr_open(struct inode *inode, struct file *file)
 164 {
 165         struct dvb_device *dvbdev = file->private_data;
 166         struct dmxdev *dmxdev = dvbdev->priv;
 167         struct dmx_frontend *front;
 168
 169         dprintk("function : %s\n", __FUNCTION__);
 170
 171         if (mutex_lock_interruptible(&dmxdev->mutex))
 172                 return -ERESTARTSYS;
 173
 174         if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 175                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 176                         mutex_unlock(&dmxdev->mutex);
 177                         return -EOPNOTSUPP;
 178                 }
 179         }
 180
 181         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 182                 dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
 183                 dmxdev->dvr_buffer.size = DVR_BUFFER_SIZE;
 184                 dmxdev->dvr_buffer.data = vmalloc(DVR_BUFFER_SIZE);
 185                 if (!dmxdev->dvr_buffer.data) {
 186                         mutex_unlock(&dmxdev->mutex);
 187                         return -ENOMEM;
 188                 }
 189         }
 190
 191         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 192                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 193
 194                 if (!dmxdev->demux->write) {
 195                         mutex_unlock(&dmxdev->mutex);
 196                         return -EOPNOTSUPP;
 197                 }
 198
 199                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 200
 201                 if (!front) {
 202                         mutex_unlock(&dmxdev->mutex);
 203                         return -EINVAL;
 204                 }
 205                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 206                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 207         }
 208         mutex_unlock(&dmxdev->mutex);
 209         return 0;
 210 }
 211
 212 static int dvb_dvr_release(struct inode *inode, struct file *file)
 213 {
 214         struct dvb_device *dvbdev = file->private_data;
 215         struct dmxdev *dmxdev = dvbdev->priv;
 216
 217         if (mutex_lock_interruptible(&dmxdev->mutex))
 218                 return -ERESTARTSYS;
 219
 220         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 221                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 222                 dmxdev->demux->connect_frontend(dmxdev->demux,
 223                                                 dmxdev->dvr_orig_fe);
 224         }
 225         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 226                 if (dmxdev->dvr_buffer.data) {
 227                         void *mem = dmxdev->dvr_buffer.data;
 228                         mb();
 229                         spin_lock_irq(&dmxdev->lock);
 230                         dmxdev->dvr_buffer.data = NULL;
 231                         spin_unlock_irq(&dmxdev->lock);
 232                         vfree(mem);
 233                 }
 234         }
 235         mutex_unlock(&dmxdev->mutex);
 236         return 0;
 237 }
 238
 239 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 240                              size_t count, loff_t *ppos)
 241 {
 242         struct dvb_device *dvbdev = file->private_data;
 243         struct dmxdev *dmxdev = dvbdev->priv;
 244         int ret;
 245
 246         if (!dmxdev->demux->write)
 247                 return -EOPNOTSUPP;
 248         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 249                 return -EINVAL;
 250         if (mutex_lock_interruptible(&dmxdev->mutex))
 251                 return -ERESTARTSYS;
 252         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 253         mutex_unlock(&dmxdev->mutex);
 254         return ret;
 255 }
 256
 257 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 258                             loff_t *ppos)
 259 {
 260         struct dvb_device *dvbdev = file->private_data;
 261         struct dmxdev *dmxdev = dvbdev->priv;
 262         int ret;
 263
 264         //mutex_lock(&dmxdev->mutex);
 265         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 266                                      file->f_flags & O_NONBLOCK,
 267                                      buf, count, ppos);
 268         //mutex_unlock(&dmxdev->mutex);
 269         return ret;
 270 }
 271
 272 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 273                                                *dmxdevfilter, int state)
 274 {
 275         spin_lock_irq(&dmxdevfilter->dev->lock);
 276         dmxdevfilter->state = state;
 277         spin_unlock_irq(&dmxdevfilter->dev->lock);
 278 }
 279
 280 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 281                                       unsigned long size)
 282 {
 283         struct dmxdev_buffer *buf = &dmxdevfilter->buffer;
 284         void *mem;
 285
 286         if (buf->size == size)
 287                 return 0;
 288         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 289                 return -EBUSY;
 290         spin_lock_irq(&dmxdevfilter->dev->lock);
 291         mem = buf->data;
 292         buf->data = NULL;
 293         buf->size = size;
 294         buf->pwrite = buf->pread = 0;
 295         spin_unlock_irq(&dmxdevfilter->dev->lock);
 296         vfree(mem);
 297
 298         if (buf->size) {
 299                 mem = vmalloc(dmxdevfilter->buffer.size);
 300                 if (!mem)
 301                         return -ENOMEM;
 302                 spin_lock_irq(&dmxdevfilter->dev->lock);
 303                 buf->data = mem;
 304                 spin_unlock_irq(&dmxdevfilter->dev->lock);
 305         }
 306         return 0;
 307 }
 308
 309 static void dvb_dmxdev_filter_timeout(unsigned long data)
 310 {
 311         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 312
 313         dmxdevfilter->buffer.error = -ETIMEDOUT;
 314         spin_lock_irq(&dmxdevfilter->dev->lock);
 315         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 316         spin_unlock_irq(&dmxdevfilter->dev->lock);
 317         wake_up(&dmxdevfilter->buffer.queue);
 318 }
 319
 320 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 321 {
 322         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 323
 324         del_timer(&dmxdevfilter->timer);
 325         if (para->timeout) {
 326                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 327                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 328                 dmxdevfilter->timer.expires =
 329                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 330                 add_timer(&dmxdevfilter->timer);
 331         }
 332 }
 333
 334 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 335                                        const u8 *buffer2, size_t buffer2_len,
 336                                        struct dmx_section_filter *filter,
 337                                        enum dmx_success success)
 338 {
 339         struct dmxdev_filter *dmxdevfilter = filter->priv;
 340         int ret;
 341
 342         if (dmxdevfilter->buffer.error) {
 343                 wake_up(&dmxdevfilter->buffer.queue);
 344                 return 0;
 345         }
 346         spin_lock(&dmxdevfilter->dev->lock);
 347         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 348                 spin_unlock(&dmxdevfilter->dev->lock);
 349                 return 0;
 350         }
 351         del_timer(&dmxdevfilter->timer);
 352         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 353                 buffer1[0], buffer1[1],
 354                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 355         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 356                                       buffer1_len);
 357         if (ret == buffer1_len) {
 358                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 359                                               buffer2_len);
 360         }
 361         if (ret < 0) {
 362                 dmxdevfilter->buffer.pwrite = dmxdevfilter->buffer.pread;
 363                 dmxdevfilter->buffer.error = -EOVERFLOW;
 364         }
 365         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 366                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 367         spin_unlock(&dmxdevfilter->dev->lock);
 368         wake_up(&dmxdevfilter->buffer.queue);
 369         return 0;
 370 }
 371
 372 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 373                                   const u8 *buffer2, size_t buffer2_len,
 374                                   struct dmx_ts_feed *feed,
 375                                   enum dmx_success success)
 376 {
 377         struct dmxdev_filter *dmxdevfilter = feed->priv;
 378         struct dmxdev_buffer *buffer;
 379         int ret;
 380
 381         spin_lock(&dmxdevfilter->dev->lock);
 382         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 383                 spin_unlock(&dmxdevfilter->dev->lock);
 384                 return 0;
 385         }
 386
 387         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP)
 388                 buffer = &dmxdevfilter->buffer;
 389         else
 390                 buffer = &dmxdevfilter->dev->dvr_buffer;
 391         if (buffer->error) {
 392                 spin_unlock(&dmxdevfilter->dev->lock);
 393                 wake_up(&buffer->queue);
 394                 return 0;
 395         }
 396         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 397         if (ret == buffer1_len)
 398                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 399         if (ret < 0) {
 400                 buffer->pwrite = buffer->pread;
 401                 buffer->error = -EOVERFLOW;
 402         }
 403         spin_unlock(&dmxdevfilter->dev->lock);
 404         wake_up(&buffer->queue);
 405         return 0;
 406 }
 407
 408 /* stop feed but only mark the specified filter as stopped (state set) */
 409 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 410 {
 411         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 412
 413         switch (dmxdevfilter->type) {
 414         case DMXDEV_TYPE_SEC:
 415                 del_timer(&dmxdevfilter->timer);
 416                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 417                 break;
 418         case DMXDEV_TYPE_PES:
 419                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 420                 break;
 421         default:
 422                 return -EINVAL;
 423         }
 424         return 0;
 425 }
 426
 427 /* start feed associated with the specified filter */
 428 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 429 {
 430         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 431
 432         switch (filter->type) {
 433         case DMXDEV_TYPE_SEC:
 434                 return filter->feed.sec->start_filtering(filter->feed.sec);
 435         case DMXDEV_TYPE_PES:
 436                 return filter->feed.ts->start_filtering(filter->feed.ts);
 437         default:
 438                 return -EINVAL;
 439         }
 440
 441         return 0;
 442 }
 443
 444 /* restart section feed if it has filters left associated with it,
 445    otherwise release the feed */
 446 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 447 {
 448         int i;
 449         struct dmxdev *dmxdev = filter->dev;
 450         u16 pid = filter->params.sec.pid;
 451
 452         for (i = 0; i < dmxdev->filternum; i++)
 453                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 454                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 455                     dmxdev->filter[i].params.sec.pid == pid) {
 456                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 457                         return 0;
 458                 }
 459
 460         filter->dev->demux->release_section_feed(dmxdev->demux,
 461                                                  filter->feed.sec);
 462
 463         return 0;
 464 }
 465
 466 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 467 {
 468         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 469                 return 0;
 470
 471         switch (dmxdevfilter->type) {
 472         case DMXDEV_TYPE_SEC:
 473                 if (!dmxdevfilter->feed.sec)
 474                         break;
 475                 dvb_dmxdev_feed_stop(dmxdevfilter);
 476                 if (dmxdevfilter->filter.sec)
 477                         dmxdevfilter->feed.sec->
 478                             release_filter(dmxdevfilter->feed.sec,
 479                                            dmxdevfilter->filter.sec);
 480                 dvb_dmxdev_feed_restart(dmxdevfilter);
 481                 dmxdevfilter->feed.sec = NULL;
 482                 break;
 483         case DMXDEV_TYPE_PES:
 484                 if (!dmxdevfilter->feed.ts)
 485                         break;
 486                 dvb_dmxdev_feed_stop(dmxdevfilter);
 487                 dmxdevfilter->dev->demux->
 488                     release_ts_feed(dmxdevfilter->dev->demux,
 489                                     dmxdevfilter->feed.ts);
 490                 dmxdevfilter->feed.ts = NULL;
 491                 break;
 492         default:
 493                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 494                         return 0;
 495                 return -EINVAL;
 496         }
 497         dmxdevfilter->buffer.pwrite = dmxdevfilter->buffer.pread = 0;
 498         return 0;
 499 }
 500
 501 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 502 {
 503         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 504                 return 0;
 505
 506         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 507         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 508         return 0;
 509 }
 510
 511 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 512 {
 513         struct dmxdev *dmxdev = filter->dev;
 514         void *mem;
 515         int ret, i;
 516
 517         if (filter->state < DMXDEV_STATE_SET)
 518                 return -EINVAL;
 519
 520         if (filter->state >= DMXDEV_STATE_GO)
 521                 dvb_dmxdev_filter_stop(filter);
 522
 523         if (!(mem = filter->buffer.data)) {
 524                 mem = vmalloc(filter->buffer.size);
 525                 spin_lock_irq(&filter->dev->lock);
 526                 filter->buffer.data = mem;
 527                 spin_unlock_irq(&filter->dev->lock);
 528                 if (!filter->buffer.data)
 529                         return -ENOMEM;
 530         }
 531
 532         filter->buffer.pwrite = filter->buffer.pread = 0;
 533
 534         switch (filter->type) {
 535         case DMXDEV_TYPE_SEC:
 536         {
 537                 struct dmx_sct_filter_params *para = &filter->params.sec;
 538                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 539                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 540
 541                 *secfilter = NULL;
 542                 *secfeed = NULL;
 543
 544
 545                 /* find active filter/feed with same PID */
 546                 for (i = 0; i < dmxdev->filternum; i++) {
 547                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 548                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 549                             dmxdev->filter[i].params.sec.pid == para->pid) {
 550                                 *secfeed = dmxdev->filter[i].feed.sec;
 551                                 break;
 552                         }
 553                 }
 554
 555                 /* if no feed found, try to allocate new one */
 556                 if (!*secfeed) {
 557                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 558                                                                    secfeed,
 559                                                                    dvb_dmxdev_section_callback);
 560                         if (ret < 0) {
 561                                 printk("DVB (%s): could not alloc feed\n",
 562                                        __FUNCTION__);
 563                                 return ret;
 564                         }
 565
 566                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 567                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 568                         if (ret < 0) {
 569                                 printk("DVB (%s): could not set feed\n",
 570                                        __FUNCTION__);
 571                                 dvb_dmxdev_feed_restart(filter);
 572                                 return ret;
 573                         }
 574                 } else {
 575                         dvb_dmxdev_feed_stop(filter);
 576                 }
 577
 578                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 579                 if (ret < 0) {
 580                         dvb_dmxdev_feed_restart(filter);
 581                         filter->feed.sec->start_filtering(*secfeed);
 582                         dprintk("could not get filter\n");
 583                         return ret;
 584                 }
 585
 586                 (*secfilter)->priv = filter;
 587
 588                 memcpy(&((*secfilter)->filter_value[3]),
 589                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 590                 memcpy(&(*secfilter)->filter_mask[3],
 591                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 592                 memcpy(&(*secfilter)->filter_mode[3],
 593                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 594
 595                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 596                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 597                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 598                 (*secfilter)->filter_mask[1] = 0;
 599                 (*secfilter)->filter_mask[2] = 0;
 600
 601                 filter->todo = 0;
 602
 603                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 604                 if (ret < 0)
 605                         return ret;
 606
 607                 dvb_dmxdev_filter_timer(filter);
 608                 break;
 609         }
 610         case DMXDEV_TYPE_PES:
 611         {
 612                 struct timespec timeout = { 0 };
 613                 struct dmx_pes_filter_params *para = &filter->params.pes;
 614                 dmx_output_t otype;
 615                 int ret;
 616                 int ts_type;
 617                 enum dmx_ts_pes ts_pes;
 618                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 619
 620                 filter->feed.ts = NULL;
 621                 otype = para->output;
 622
 623                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 624
 625                 if (ts_pes < DMX_PES_OTHER)
 626                         ts_type = TS_DECODER;
 627                 else
 628                         ts_type = 0;
 629
 630                 if (otype == DMX_OUT_TS_TAP)
 631                         ts_type |= TS_PACKET;
 632
 633                 if (otype == DMX_OUT_TAP)
 634                         ts_type |= TS_PAYLOAD_ONLY | TS_PACKET;
 635
 636                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 637                                                       tsfeed,
 638                                                       dvb_dmxdev_ts_callback);
 639                 if (ret < 0)
 640                         return ret;
 641
 642                 (*tsfeed)->priv = filter;
 643
 644                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 645                                      32768, timeout);
 646                 if (ret < 0) {
 647                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 648                                                        *tsfeed);
 649                         return ret;
 650                 }
 651
 652                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 653                 if (ret < 0) {
 654                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 655                                                        *tsfeed);
 656                         return ret;
 657                 }
 658
 659                 break;
 660         }
 661         default:
 662                 return -EINVAL;
 663         }
 664
 665         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 666         return 0;
 667 }
 668
 669 static int dvb_demux_open(struct inode *inode, struct file *file)
 670 {
 671         struct dvb_device *dvbdev = file->private_data;
 672         struct dmxdev *dmxdev = dvbdev->priv;
 673         int i;
 674         struct dmxdev_filter *dmxdevfilter;
 675
 676         if (!dmxdev->filter)
 677                 return -EINVAL;
 678
 679         if (mutex_lock_interruptible(&dmxdev->mutex))
 680                 return -ERESTARTSYS;
 681
 682         for (i = 0; i < dmxdev->filternum; i++)
 683                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 684                         break;
 685
 686         if (i == dmxdev->filternum) {
 687                 mutex_unlock(&dmxdev->mutex);
 688                 return -EMFILE;
 689         }
 690
 691         dmxdevfilter = &dmxdev->filter[i];
 692         mutex_init(&dmxdevfilter->mutex);
 693         file->private_data = dmxdevfilter;
 694
 695         dvb_dmxdev_buffer_init(&dmxdevfilter->buffer);
 696         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 697         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 698         dmxdevfilter->feed.ts = NULL;
 699         init_timer(&dmxdevfilter->timer);
 700
 701         mutex_unlock(&dmxdev->mutex);
 702         return 0;
 703 }
 704
 705 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 706                                   struct dmxdev_filter *dmxdevfilter)
 707 {
 708         if (mutex_lock_interruptible(&dmxdev->mutex))
 709                 return -ERESTARTSYS;
 710
 711         if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 712                 mutex_unlock(&dmxdev->mutex);
 713                 return -ERESTARTSYS;
 714         }
 715
 716         dvb_dmxdev_filter_stop(dmxdevfilter);
 717         dvb_dmxdev_filter_reset(dmxdevfilter);
 718
 719         if (dmxdevfilter->buffer.data) {
 720                 void *mem = dmxdevfilter->buffer.data;
 721
 722                 spin_lock_irq(&dmxdev->lock);
 723                 dmxdevfilter->buffer.data = NULL;
 724                 spin_unlock_irq(&dmxdev->lock);
 725                 vfree(mem);
 726         }
 727
 728         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 729         wake_up(&dmxdevfilter->buffer.queue);
 730         mutex_unlock(&dmxdevfilter->mutex);
 731         mutex_unlock(&dmxdev->mutex);
 732         return 0;
 733 }
 734
 735 static inline void invert_mode(dmx_filter_t *filter)
 736 {
 737         int i;
 738
 739         for (i = 0; i < DMX_FILTER_SIZE; i++)
 740                 filter->mode[i] ^= 0xff;
 741 }
 742
 743 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 744                                  struct dmxdev_filter *dmxdevfilter,
 745                                  struct dmx_sct_filter_params *params)
 746 {
 747         dprintk("function : %s\n", __FUNCTION__);
 748
 749         dvb_dmxdev_filter_stop(dmxdevfilter);
 750
 751         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 752         memcpy(&dmxdevfilter->params.sec,
 753                params, sizeof(struct dmx_sct_filter_params));
 754         invert_mode(&dmxdevfilter->params.sec.filter);
 755         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 756
 757         if (params->flags & DMX_IMMEDIATE_START)
 758                 return dvb_dmxdev_filter_start(dmxdevfilter);
 759
 760         return 0;
 761 }
 762
 763 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 764                                      struct dmxdev_filter *dmxdevfilter,
 765                                      struct dmx_pes_filter_params *params)
 766 {
 767         dvb_dmxdev_filter_stop(dmxdevfilter);
 768
 769         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 770                 return -EINVAL;
 771
 772         dmxdevfilter->type = DMXDEV_TYPE_PES;
 773         memcpy(&dmxdevfilter->params, params,
 774                sizeof(struct dmx_pes_filter_params));
 775
 776         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 777
 778         if (params->flags & DMX_IMMEDIATE_START)
 779                 return dvb_dmxdev_filter_start(dmxdevfilter);
 780
 781         return 0;
 782 }
 783
 784 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 785                                    struct file *file, char __user *buf,
 786                                    size_t count, loff_t *ppos)
 787 {
 788         int result, hcount;
 789         int done = 0;
 790
 791         if (dfil->todo <= 0) {
 792                 hcount = 3 + dfil->todo;
 793                 if (hcount > count)
 794                         hcount = count;
 795                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 796                                                 file->f_flags & O_NONBLOCK,
 797                                                 buf, hcount, ppos);
 798                 if (result < 0) {
 799                         dfil->todo = 0;
 800                         return result;
 801                 }
 802                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 803                         return -EFAULT;
 804                 buf += result;
 805                 done = result;
 806                 count -= result;
 807                 dfil->todo -= result;
 808                 if (dfil->todo > -3)
 809                         return done;
 810                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 811                 if (!count)
 812                         return done;
 813         }
 814         if (count > dfil->todo)
 815                 count = dfil->todo;
 816         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 817                                         file->f_flags & O_NONBLOCK,
 818                                         buf, count, ppos);
 819         if (result < 0)
 820                 return result;
 821         dfil->todo -= result;
 822         return (result + done);
 823 }
 824
 825 static ssize_t
 826 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 827                loff_t *ppos)
 828 {
 829         struct dmxdev_filter *dmxdevfilter = file->private_data;
 830         int ret;
 831
 832         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 833                 return -ERESTARTSYS;
 834
 835         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 836                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 837         else
 838                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 839                                              file->f_flags & O_NONBLOCK,
 840                                              buf, count, ppos);
 841
 842         mutex_unlock(&dmxdevfilter->mutex);
 843         return ret;
 844 }
 845
 846 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 847                               unsigned int cmd, void *parg)
 848 {
 849         struct dmxdev_filter *dmxdevfilter = file->private_data;
 850         struct dmxdev *dmxdev = dmxdevfilter->dev;
 851         unsigned long arg = (unsigned long)parg;
 852         int ret = 0;
 853
 854         if (mutex_lock_interruptible(&dmxdev->mutex))
 855                 return -ERESTARTSYS;
 856
 857         switch (cmd) {
 858         case DMX_START:
 859                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 860                         mutex_unlock(&dmxdev->mutex);
 861                         return -ERESTARTSYS;
 862                 }
 863                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 864                         ret = -EINVAL;
 865                 else
 866                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 867                 mutex_unlock(&dmxdevfilter->mutex);
 868                 break;
 869
 870         case DMX_STOP:
 871                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 872                         mutex_unlock(&dmxdev->mutex);
 873                         return -ERESTARTSYS;
 874                 }
 875                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 876                 mutex_unlock(&dmxdevfilter->mutex);
 877                 break;
 878
 879         case DMX_SET_FILTER:
 880                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 881                         mutex_unlock(&dmxdev->mutex);
 882                         return -ERESTARTSYS;
 883                 }
 884                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 885                 mutex_unlock(&dmxdevfilter->mutex);
 886                 break;
 887
 888         case DMX_SET_PES_FILTER:
 889                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 890                         mutex_unlock(&dmxdev->mutex);
 891                         return -ERESTARTSYS;
 892                 }
 893                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 894                 mutex_unlock(&dmxdevfilter->mutex);
 895                 break;
 896
 897         case DMX_SET_BUFFER_SIZE:
 898                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 899                         mutex_unlock(&dmxdev->mutex);
 900                         return -ERESTARTSYS;
 901                 }
 902                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 903                 mutex_unlock(&dmxdevfilter->mutex);
 904                 break;
 905
 906         case DMX_GET_EVENT:
 907                 break;
 908
 909         case DMX_GET_PES_PIDS:
 910                 if (!dmxdev->demux->get_pes_pids) {
 911                         ret = -EINVAL;
 912                         break;
 913                 }
 914                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 915                 break;
 916
 917         case DMX_GET_CAPS:
 918                 if (!dmxdev->demux->get_caps) {
 919                         ret = -EINVAL;
 920                         break;
 921                 }
 922                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 923                 break;
 924
 925         case DMX_SET_SOURCE:
 926                 if (!dmxdev->demux->set_source) {
 927                         ret = -EINVAL;
 928                         break;
 929                 }
 930                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 931                 break;
 932
 933         case DMX_GET_STC:
 934                 if (!dmxdev->demux->get_stc) {
 935                         ret = -EINVAL;
 936                         break;
 937                 }
 938                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 939                                              ((struct dmx_stc *)parg)->num,
 940                                              &((struct dmx_stc *)parg)->stc,
 941                                              &((struct dmx_stc *)parg)->base);
 942                 break;
 943
 944         default:
 945                 ret = -EINVAL;
 946                 break;
 947         }
 948         mutex_unlock(&dmxdev->mutex);
 949         return ret;
 950 }
 951
 952 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 953                            unsigned int cmd, unsigned long arg)
 954 {
 955         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 956 }
 957
 958 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 959 {
 960         struct dmxdev_filter *dmxdevfilter = file->private_data;
 961         unsigned int mask = 0;
 962
 963         if (!dmxdevfilter)
 964                 return -EINVAL;
 965
 966         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 967
 968         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 969             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 970             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 971                 return 0;
 972
 973         if (dmxdevfilter->buffer.error)
 974                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 975
 976         if (dmxdevfilter->buffer.pread != dmxdevfilter->buffer.pwrite)
 977                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
 978
 979         return mask;
 980 }
 981
 982 static int dvb_demux_release(struct inode *inode, struct file *file)
 983 {
 984         struct dmxdev_filter *dmxdevfilter = file->private_data;
 985         struct dmxdev *dmxdev = dmxdevfilter->dev;
 986
 987         return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
 988 }
 989
 990 static struct file_operations dvb_demux_fops = {
 991         .owner = THIS_MODULE,
 992         .read = dvb_demux_read,
 993         .ioctl = dvb_demux_ioctl,
 994         .open = dvb_demux_open,
 995         .release = dvb_demux_release,
 996         .poll = dvb_demux_poll,
 997 };
 998
 999 static struct dvb_device dvbdev_demux = {
1000         .priv = NULL,
1001         .users = 1,
1002         .writers = 1,
1003         .fops = &dvb_demux_fops
1004 };
1005
1006 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1007                             unsigned int cmd, void *parg)
1008 {
1009         struct dvb_device *dvbdev = file->private_data;
1010         struct dmxdev *dmxdev = dvbdev->priv;
1011         int ret;
1012
1013         if (mutex_lock_interruptible(&dmxdev->mutex))
1014                 return -ERESTARTSYS;
1015
1016         switch (cmd) {
1017         case DMX_SET_BUFFER_SIZE:
1018                 // FIXME: implement
1019                 ret = 0;
1020                 break;
1021
1022         default:
1023                 ret = -EINVAL;
1024                 break;
1025         }
1026         mutex_unlock(&dmxdev->mutex);
1027         return ret;
1028 }
1029
1030 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1031                          unsigned int cmd, unsigned long arg)
1032 {
1033         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1034 }
1035
1036 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1037 {
1038         struct dvb_device *dvbdev = file->private_data;
1039         struct dmxdev *dmxdev = dvbdev->priv;
1040         unsigned int mask = 0;
1041
1042         dprintk("function : %s\n", __FUNCTION__);
1043
1044         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1045
1046         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1047                 if (dmxdev->dvr_buffer.error)
1048                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1049
1050                 if (dmxdev->dvr_buffer.pread != dmxdev->dvr_buffer.pwrite)
1051                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1052         } else
1053                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1054
1055         return mask;
1056 }
1057
1058 static struct file_operations dvb_dvr_fops = {
1059         .owner = THIS_MODULE,
1060         .read = dvb_dvr_read,
1061         .write = dvb_dvr_write,
1062         .ioctl = dvb_dvr_ioctl,
1063         .open = dvb_dvr_open,
1064         .release = dvb_dvr_release,
1065         .poll = dvb_dvr_poll,
1066 };
1067
1068 static struct dvb_device dvbdev_dvr = {
1069         .priv = NULL,
1070         .users = 1,
1071         .writers = 1,
1072         .fops = &dvb_dvr_fops
1073 };
1074
1075 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1076 {
1077         int i;
1078
1079         if (dmxdev->demux->open(dmxdev->demux) < 0)
1080                 return -EUSERS;
1081
1082         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1083         if (!dmxdev->filter)
1084                 return -ENOMEM;
1085
1086         mutex_init(&dmxdev->mutex);
1087         spin_lock_init(&dmxdev->lock);
1088         for (i = 0; i < dmxdev->filternum; i++) {
1089                 dmxdev->filter[i].dev = dmxdev;
1090                 dmxdev->filter[i].buffer.data = NULL;
1091                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1092                                             DMXDEV_STATE_FREE);
1093         }
1094
1095         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1096                             DVB_DEVICE_DEMUX);
1097         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1098                             dmxdev, DVB_DEVICE_DVR);
1099
1100         dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
1101
1102         return 0;
1103 }
1104
1105 EXPORT_SYMBOL(dvb_dmxdev_init);
1106
1107 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1108 {
1109         dvb_unregister_device(dmxdev->dvbdev);
1110         dvb_unregister_device(dmxdev->dvr_dvbdev);
1111
1112         vfree(dmxdev->filter);
1113         dmxdev->filter = NULL;
1114         dmxdev->demux->close(dmxdev->demux);
1115 }
1116
1117 EXPORT_SYMBOL(dvb_dmxdev_release);