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/sched.h> 24#include <linux/spinlock.h> 25#include <linux/slab.h> 26#include <linux/vmalloc.h> 27#include <linux/module.h> 28#include <linux/poll.h> 29#include <linux/ioctl.h> 30#include <linux/wait.h> 31#include <asm/uaccess.h> 32#include <asm/system.h> 33#include "dmxdev.h" 34 35static int debug; 36 37module_param(debug, int, 0644); 38MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); 39 40#define dprintk if (debug) printk 41 42static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf, 43 const u8 *src, size_t len) 44{ 45 ssize_t free; 46 47 if (!len) 48 return 0; 49 if (!buf->data) 50 return 0; 51 52 free = dvb_ringbuffer_free(buf); 53 if (len > free) { 54 dprintk("dmxdev: buffer overflow\n"); 55 return -EOVERFLOW; 56 } 57 58 return dvb_ringbuffer_write(buf, src, len); 59} 60 61static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src, 62 int non_blocking, char __user *buf, 63 size_t count, loff_t *ppos) 64{ 65 size_t todo; 66 ssize_t avail; 67 ssize_t ret = 0; 68 69 if (!src->data) 70 return 0; 71 72 if (src->error) { 73 ret = src->error; 74 dvb_ringbuffer_flush(src); 75 return ret; 76 } 77 78 for (todo = count; todo > 0; todo -= ret) { 79 if (non_blocking && dvb_ringbuffer_empty(src)) { 80 ret = -EWOULDBLOCK; 81 break; 82 } 83 84 ret = wait_event_interruptible(src->queue, 85 !dvb_ringbuffer_empty(src) || 86 (src->error != 0)); 87 if (ret < 0) 88 break; 89 90 if (src->error) { 91 ret = src->error; 92 dvb_ringbuffer_flush(src); 93 break; 94 } 95 96 avail = dvb_ringbuffer_avail(src); 97 if (avail > todo) 98 avail = todo; 99 100 ret = dvb_ringbuffer_read_user(src, buf, avail); 101 if (ret < 0) 102 break; 103 104 buf += ret; 105 } 106 107 return (count - todo) ? (count - todo) : ret; 108} 109 110static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type) 111{ 112 struct list_head *head, *pos; 113 114 head = demux->get_frontends(demux); 115 if (!head) 116 return NULL; 117 list_for_each(pos, head) 118 if (DMX_FE_ENTRY(pos)->source == type) 119 return DMX_FE_ENTRY(pos); 120 121 return NULL; 122} 123 124static int dvb_dvr_open(struct inode *inode, struct file *file) 125{ 126 struct dvb_device *dvbdev = file->private_data; 127 struct dmxdev *dmxdev = dvbdev->priv; 128 struct dmx_frontend *front; 129 130 dprintk("function : %s\n", __func__); 131 132 if (mutex_lock_interruptible(&dmxdev->mutex)) 133 return -ERESTARTSYS; 134 135 if (dmxdev->exit) { 136 mutex_unlock(&dmxdev->mutex); 137 return -ENODEV; 138 } 139 140 if ((file->f_flags & O_ACCMODE) == O_RDWR) { 141 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) { 142 mutex_unlock(&dmxdev->mutex); 143 return -EOPNOTSUPP; 144 } 145 } 146 147 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 148 void *mem; 149 if (!dvbdev->readers) { 150 mutex_unlock(&dmxdev->mutex); 151 return -EBUSY; 152 } 153 mem = vmalloc(DVR_BUFFER_SIZE); 154 if (!mem) { 155 mutex_unlock(&dmxdev->mutex); 156 return -ENOMEM; 157 } 158 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE); 159 dvbdev->readers--; 160 } 161 162 if ((file->f_flags & O_ACCMODE) == O_WRONLY) { 163 dmxdev->dvr_orig_fe = dmxdev->demux->frontend; 164 165 if (!dmxdev->demux->write) { 166 mutex_unlock(&dmxdev->mutex); 167 return -EOPNOTSUPP; 168 } 169 170 front = get_fe(dmxdev->demux, DMX_MEMORY_FE); 171 172 if (!front) { 173 mutex_unlock(&dmxdev->mutex); 174 return -EINVAL; 175 } 176 dmxdev->demux->disconnect_frontend(dmxdev->demux); 177 dmxdev->demux->connect_frontend(dmxdev->demux, front); 178 } 179 dvbdev->users++; 180 mutex_unlock(&dmxdev->mutex); 181 return 0; 182} 183 184static int dvb_dvr_release(struct inode *inode, struct file *file) 185{ 186 struct dvb_device *dvbdev = file->private_data; 187 struct dmxdev *dmxdev = dvbdev->priv; 188 189 mutex_lock(&dmxdev->mutex); 190 191 if ((file->f_flags & O_ACCMODE) == O_WRONLY) { 192 dmxdev->demux->disconnect_frontend(dmxdev->demux); 193 dmxdev->demux->connect_frontend(dmxdev->demux, 194 dmxdev->dvr_orig_fe); 195 } 196 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 197 dvbdev->readers++; 198 if (dmxdev->dvr_buffer.data) { 199 void *mem = dmxdev->dvr_buffer.data; 200 mb(); 201 spin_lock_irq(&dmxdev->lock); 202 dmxdev->dvr_buffer.data = NULL; 203 spin_unlock_irq(&dmxdev->lock); 204 vfree(mem); 205 } 206 } 207 /* TODO */ 208 dvbdev->users--; 209 if (dvbdev->users == 1 && dmxdev->exit == 1) { 210 fops_put(file->f_op); 211 file->f_op = NULL; 212 mutex_unlock(&dmxdev->mutex); 213 wake_up(&dvbdev->wait_queue); 214 } else 215 mutex_unlock(&dmxdev->mutex); 216 217 return 0; 218} 219 220static ssize_t dvb_dvr_write(struct file *file, const char __user *buf, 221 size_t count, loff_t *ppos) 222{ 223 struct dvb_device *dvbdev = file->private_data; 224 struct dmxdev *dmxdev = dvbdev->priv; 225 int ret; 226 227 if (!dmxdev->demux->write) 228 return -EOPNOTSUPP; 229 if ((file->f_flags & O_ACCMODE) != O_WRONLY) 230 return -EINVAL; 231 if (mutex_lock_interruptible(&dmxdev->mutex)) 232 return -ERESTARTSYS; 233 234 if (dmxdev->exit) { 235 mutex_unlock(&dmxdev->mutex); 236 return -ENODEV; 237 } 238 ret = dmxdev->demux->write(dmxdev->demux, buf, count); 239 mutex_unlock(&dmxdev->mutex); 240 return ret; 241} 242 243static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count, 244 loff_t *ppos) 245{ 246 struct dvb_device *dvbdev = file->private_data; 247 struct dmxdev *dmxdev = dvbdev->priv; 248 249 if (dmxdev->exit) 250 return -ENODEV; 251 252 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer, 253 file->f_flags & O_NONBLOCK, 254 buf, count, ppos); 255} 256 257static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev, 258 unsigned long size) 259{ 260 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer; 261 void *newmem; 262 void *oldmem; 263 264 dprintk("function : %s\n", __func__); 265 266 if (buf->size == size) 267 return 0; 268 if (!size) 269 return -EINVAL; 270 271 newmem = vmalloc(size); 272 if (!newmem) 273 return -ENOMEM; 274 275 oldmem = buf->data; 276 277 spin_lock_irq(&dmxdev->lock); 278 buf->data = newmem; 279 buf->size = size; 280 281 /* reset and not flush in case the buffer shrinks */ 282 dvb_ringbuffer_reset(buf); 283 spin_unlock_irq(&dmxdev->lock); 284 285 vfree(oldmem); 286 287 return 0; 288} 289 290static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter 291 *dmxdevfilter, int state) 292{ 293 spin_lock_irq(&dmxdevfilter->dev->lock); 294 dmxdevfilter->state = state; 295 spin_unlock_irq(&dmxdevfilter->dev->lock); 296} 297 298static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter, 299 unsigned long size) 300{ 301 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer; 302 void *newmem; 303 void *oldmem; 304 305 if (buf->size == size) 306 return 0; 307 if (!size) 308 return -EINVAL; 309 if (dmxdevfilter->state >= DMXDEV_STATE_GO) 310 return -EBUSY; 311 312 newmem = vmalloc(size); 313 if (!newmem) 314 return -ENOMEM; 315 316 oldmem = buf->data; 317 318 spin_lock_irq(&dmxdevfilter->dev->lock); 319 buf->data = newmem; 320 buf->size = size; 321 322 /* reset and not flush in case the buffer shrinks */ 323 dvb_ringbuffer_reset(buf); 324 spin_unlock_irq(&dmxdevfilter->dev->lock); 325 326 vfree(oldmem); 327 328 return 0; 329} 330 331static void dvb_dmxdev_filter_timeout(unsigned long data) 332{ 333 struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data; 334 335 dmxdevfilter->buffer.error = -ETIMEDOUT; 336 spin_lock_irq(&dmxdevfilter->dev->lock); 337 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT; 338 spin_unlock_irq(&dmxdevfilter->dev->lock); 339 wake_up(&dmxdevfilter->buffer.queue); 340} 341 342static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter) 343{ 344 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec; 345 346 del_timer(&dmxdevfilter->timer); 347 if (para->timeout) { 348 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout; 349 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter; 350 dmxdevfilter->timer.expires = 351 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000; 352 add_timer(&dmxdevfilter->timer); 353 } 354} 355 356static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len, 357 const u8 *buffer2, size_t buffer2_len, 358 struct dmx_section_filter *filter, 359 enum dmx_success success) 360{ 361 struct dmxdev_filter *dmxdevfilter = filter->priv; 362 int ret; 363 364 if (dmxdevfilter->buffer.error) { 365 wake_up(&dmxdevfilter->buffer.queue); 366 return 0; 367 } 368 spin_lock(&dmxdevfilter->dev->lock); 369 if (dmxdevfilter->state != DMXDEV_STATE_GO) { 370 spin_unlock(&dmxdevfilter->dev->lock); 371 return 0; 372 } 373 del_timer(&dmxdevfilter->timer); 374 dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n", 375 buffer1[0], buffer1[1], 376 buffer1[2], buffer1[3], buffer1[4], buffer1[5]); 377 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1, 378 buffer1_len); 379 if (ret == buffer1_len) { 380 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2, 381 buffer2_len); 382 } 383 if (ret < 0) { 384 dvb_ringbuffer_flush(&dmxdevfilter->buffer); 385 dmxdevfilter->buffer.error = ret; 386 } 387 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT) 388 dmxdevfilter->state = DMXDEV_STATE_DONE; 389 spin_unlock(&dmxdevfilter->dev->lock); 390 wake_up(&dmxdevfilter->buffer.queue); 391 return 0; 392} 393 394static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len, 395 const u8 *buffer2, size_t buffer2_len, 396 struct dmx_ts_feed *feed, 397 enum dmx_success success) 398{ 399 struct dmxdev_filter *dmxdevfilter = feed->priv; 400 struct dvb_ringbuffer *buffer; 401 int ret; 402 403 spin_lock(&dmxdevfilter->dev->lock); 404 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) { 405 spin_unlock(&dmxdevfilter->dev->lock); 406 return 0; 407 } 408 409 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP 410 || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) 411 buffer = &dmxdevfilter->buffer; 412 else 413 buffer = &dmxdevfilter->dev->dvr_buffer; 414 if (buffer->error) { 415 spin_unlock(&dmxdevfilter->dev->lock); 416 wake_up(&buffer->queue); 417 return 0; 418 } 419 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len); 420 if (ret == buffer1_len) 421 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len); 422 if (ret < 0) { 423 dvb_ringbuffer_flush(buffer); 424 buffer->error = ret; 425 } 426 spin_unlock(&dmxdevfilter->dev->lock); 427 wake_up(&buffer->queue); 428 return 0; 429} 430 431/* stop feed but only mark the specified filter as stopped (state set) */ 432static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter) 433{ 434 struct dmxdev_feed *feed; 435 436 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); 437 438 switch (dmxdevfilter->type) { 439 case DMXDEV_TYPE_SEC: 440 del_timer(&dmxdevfilter->timer); 441 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec); 442 break; 443 case DMXDEV_TYPE_PES: 444 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) 445 feed->ts->stop_filtering(feed->ts); 446 break; 447 default: 448 return -EINVAL; 449 } 450 return 0; 451} 452 453/* start feed associated with the specified filter */ 454static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter) 455{ 456 struct dmxdev_feed *feed; 457 int ret; 458 459 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); 460 461 switch (filter->type) { 462 case DMXDEV_TYPE_SEC: 463 return filter->feed.sec->start_filtering(filter->feed.sec); 464 case DMXDEV_TYPE_PES: 465 list_for_each_entry(feed, &filter->feed.ts, next) { 466 ret = feed->ts->start_filtering(feed->ts); 467 if (ret < 0) { 468 dvb_dmxdev_feed_stop(filter); 469 return ret; 470 } 471 } 472 break; 473 default: 474 return -EINVAL; 475 } 476 477 return 0; 478} 479 480/* restart section feed if it has filters left associated with it, 481 otherwise release the feed */ 482static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter) 483{ 484 int i; 485 struct dmxdev *dmxdev = filter->dev; 486 u16 pid = filter->params.sec.pid; 487 488 for (i = 0; i < dmxdev->filternum; i++) 489 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && 490 dmxdev->filter[i].type == DMXDEV_TYPE_SEC && 491 dmxdev->filter[i].params.sec.pid == pid) { 492 dvb_dmxdev_feed_start(&dmxdev->filter[i]); 493 return 0; 494 } 495 496 filter->dev->demux->release_section_feed(dmxdev->demux, 497 filter->feed.sec); 498 499 return 0; 500} 501 502static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter) 503{ 504 struct dmxdev_feed *feed; 505 struct dmx_demux *demux; 506 507 if (dmxdevfilter->state < DMXDEV_STATE_GO) 508 return 0; 509 510 switch (dmxdevfilter->type) { 511 case DMXDEV_TYPE_SEC: 512 if (!dmxdevfilter->feed.sec) 513 break; 514 dvb_dmxdev_feed_stop(dmxdevfilter); 515 if (dmxdevfilter->filter.sec) 516 dmxdevfilter->feed.sec-> 517 release_filter(dmxdevfilter->feed.sec, 518 dmxdevfilter->filter.sec); 519 dvb_dmxdev_feed_restart(dmxdevfilter); 520 dmxdevfilter->feed.sec = NULL; 521 break; 522 case DMXDEV_TYPE_PES: 523 dvb_dmxdev_feed_stop(dmxdevfilter); 524 demux = dmxdevfilter->dev->demux; 525 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) { 526 demux->release_ts_feed(demux, feed->ts); 527 feed->ts = NULL; 528 } 529 break; 530 default: 531 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED) 532 return 0; 533 return -EINVAL; 534 } 535 536 dvb_ringbuffer_flush(&dmxdevfilter->buffer); 537 return 0; 538} 539 540static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter) 541{ 542 struct dmxdev_feed *feed, *tmp; 543 544 /* delete all PIDs */ 545 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) { 546 list_del(&feed->next); 547 kfree(feed); 548 } 549 550 BUG_ON(!list_empty(&dmxdevfilter->feed.ts)); 551} 552 553static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter) 554{ 555 if (dmxdevfilter->state < DMXDEV_STATE_SET) 556 return 0; 557 558 if (dmxdevfilter->type == DMXDEV_TYPE_PES) 559 dvb_dmxdev_delete_pids(dmxdevfilter); 560 561 dmxdevfilter->type = DMXDEV_TYPE_NONE; 562 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); 563 return 0; 564} 565 566static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev, 567 struct dmxdev_filter *filter, 568 struct dmxdev_feed *feed) 569{ 570 struct timespec timeout = { 0 }; 571 struct dmx_pes_filter_params *para = &filter->params.pes; 572 dmx_output_t otype; 573 int ret; 574 int ts_type; 575 dmx_pes_type_t ts_pes; 576 struct dmx_ts_feed *tsfeed; 577 578 feed->ts = NULL; 579 otype = para->output; 580 581 ts_pes = para->pes_type; 582 583 if (ts_pes < DMX_PES_OTHER) 584 ts_type = TS_DECODER; 585 else 586 ts_type = 0; 587 588 if (otype == DMX_OUT_TS_TAP) 589 ts_type |= TS_PACKET; 590 else if (otype == DMX_OUT_TSDEMUX_TAP) 591 ts_type |= TS_PACKET | TS_DEMUX; 592 else if (otype == DMX_OUT_TAP) 593 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY; 594 595 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts, 596 dvb_dmxdev_ts_callback); 597 if (ret < 0) 598 return ret; 599 600 tsfeed = feed->ts; 601 tsfeed->priv = filter; 602 603 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, 32768, timeout); 604 if (ret < 0) { 605 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed); 606 return ret; 607 } 608 609 ret = tsfeed->start_filtering(tsfeed); 610 if (ret < 0) { 611 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed); 612 return ret; 613 } 614 615 return 0; 616} 617 618static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter) 619{ 620 struct dmxdev *dmxdev = filter->dev; 621 struct dmxdev_feed *feed; 622 void *mem; 623 int ret, i; 624 625 if (filter->state < DMXDEV_STATE_SET) 626 return -EINVAL; 627 628 if (filter->state >= DMXDEV_STATE_GO) 629 dvb_dmxdev_filter_stop(filter); 630 631 if (!filter->buffer.data) { 632 mem = vmalloc(filter->buffer.size); 633 if (!mem) 634 return -ENOMEM; 635 spin_lock_irq(&filter->dev->lock); 636 filter->buffer.data = mem; 637 spin_unlock_irq(&filter->dev->lock); 638 } 639 640 dvb_ringbuffer_flush(&filter->buffer); 641 642 switch (filter->type) { 643 case DMXDEV_TYPE_SEC: 644 { 645 struct dmx_sct_filter_params *para = &filter->params.sec; 646 struct dmx_section_filter **secfilter = &filter->filter.sec; 647 struct dmx_section_feed **secfeed = &filter->feed.sec; 648 649 *secfilter = NULL; 650 *secfeed = NULL; 651 652 653 /* find active filter/feed with same PID */ 654 for (i = 0; i < dmxdev->filternum; i++) { 655 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && 656 dmxdev->filter[i].type == DMXDEV_TYPE_SEC && 657 dmxdev->filter[i].params.sec.pid == para->pid) { 658 *secfeed = dmxdev->filter[i].feed.sec; 659 break; 660 } 661 } 662 663 /* if no feed found, try to allocate new one */ 664 if (!*secfeed) { 665 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux, 666 secfeed, 667 dvb_dmxdev_section_callback); 668 if (ret < 0) { 669 printk("DVB (%s): could not alloc feed\n", 670 __func__); 671 return ret; 672 } 673 674 ret = (*secfeed)->set(*secfeed, para->pid, 32768, 675 (para->flags & DMX_CHECK_CRC) ? 1 : 0); 676 if (ret < 0) { 677 printk("DVB (%s): could not set feed\n", 678 __func__); 679 dvb_dmxdev_feed_restart(filter); 680 return ret; 681 } 682 } else { 683 dvb_dmxdev_feed_stop(filter); 684 } 685 686 ret = (*secfeed)->allocate_filter(*secfeed, secfilter); 687 if (ret < 0) { 688 dvb_dmxdev_feed_restart(filter); 689 filter->feed.sec->start_filtering(*secfeed); 690 dprintk("could not get filter\n"); 691 return ret; 692 } 693 694 (*secfilter)->priv = filter; 695 696 memcpy(&((*secfilter)->filter_value[3]), 697 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1); 698 memcpy(&(*secfilter)->filter_mask[3], 699 ¶->filter.mask[1], DMX_FILTER_SIZE - 1); 700 memcpy(&(*secfilter)->filter_mode[3], 701 ¶->filter.mode[1], DMX_FILTER_SIZE - 1); 702 703 (*secfilter)->filter_value[0] = para->filter.filter[0]; 704 (*secfilter)->filter_mask[0] = para->filter.mask[0]; 705 (*secfilter)->filter_mode[0] = para->filter.mode[0]; 706 (*secfilter)->filter_mask[1] = 0; 707 (*secfilter)->filter_mask[2] = 0; 708 709 filter->todo = 0; 710 711 ret = filter->feed.sec->start_filtering(filter->feed.sec); 712 if (ret < 0) 713 return ret; 714 715 dvb_dmxdev_filter_timer(filter); 716 break; 717 } 718 case DMXDEV_TYPE_PES: 719 list_for_each_entry(feed, &filter->feed.ts, next) { 720 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed); 721 if (ret < 0) { 722 dvb_dmxdev_filter_stop(filter); 723 return ret; 724 } 725 } 726 break; 727 default: 728 return -EINVAL; 729 } 730 731 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); 732 return 0; 733} 734 735static int dvb_demux_open(struct inode *inode, struct file *file) 736{ 737 struct dvb_device *dvbdev = file->private_data; 738 struct dmxdev *dmxdev = dvbdev->priv; 739 int i; 740 struct dmxdev_filter *dmxdevfilter; 741 742 if (!dmxdev->filter) 743 return -EINVAL; 744 745 if (mutex_lock_interruptible(&dmxdev->mutex)) 746 return -ERESTARTSYS; 747 748 for (i = 0; i < dmxdev->filternum; i++) 749 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE) 750 break; 751 752 if (i == dmxdev->filternum) { 753 mutex_unlock(&dmxdev->mutex); 754 return -EMFILE; 755 } 756 757 dmxdevfilter = &dmxdev->filter[i]; 758 mutex_init(&dmxdevfilter->mutex); 759 file->private_data = dmxdevfilter; 760 761 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192); 762 dmxdevfilter->type = DMXDEV_TYPE_NONE; 763 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); 764 init_timer(&dmxdevfilter->timer); 765 766 dvbdev->users++; 767 768 mutex_unlock(&dmxdev->mutex); 769 return 0; 770} 771 772static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, 773 struct dmxdev_filter *dmxdevfilter) 774{ 775 mutex_lock(&dmxdev->mutex); 776 mutex_lock(&dmxdevfilter->mutex); 777 778 dvb_dmxdev_filter_stop(dmxdevfilter); 779 dvb_dmxdev_filter_reset(dmxdevfilter); 780 781 if (dmxdevfilter->buffer.data) { 782 void *mem = dmxdevfilter->buffer.data; 783 784 spin_lock_irq(&dmxdev->lock); 785 dmxdevfilter->buffer.data = NULL; 786 spin_unlock_irq(&dmxdev->lock); 787 vfree(mem); 788 } 789 790 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE); 791 wake_up(&dmxdevfilter->buffer.queue); 792 mutex_unlock(&dmxdevfilter->mutex); 793 mutex_unlock(&dmxdev->mutex); 794 return 0; 795} 796 797static inline void invert_mode(dmx_filter_t *filter) 798{ 799 int i; 800 801 for (i = 0; i < DMX_FILTER_SIZE; i++) 802 filter->mode[i] ^= 0xff; 803} 804 805static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev, 806 struct dmxdev_filter *filter, u16 pid) 807{ 808 struct dmxdev_feed *feed; 809 810 if ((filter->type != DMXDEV_TYPE_PES) || 811 (filter->state < DMXDEV_STATE_SET)) 812 return -EINVAL; 813 814 /* only TS packet filters may have multiple PIDs */ 815 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) && 816 (!list_empty(&filter->feed.ts))) 817 return -EINVAL; 818 819 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL); 820 if (feed == NULL) 821 return -ENOMEM; 822 823 feed->pid = pid; 824 list_add(&feed->next, &filter->feed.ts); 825 826 if (filter->state >= DMXDEV_STATE_GO) 827 return dvb_dmxdev_start_feed(dmxdev, filter, feed); 828 829 return 0; 830} 831 832static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev, 833 struct dmxdev_filter *filter, u16 pid) 834{ 835 struct dmxdev_feed *feed, *tmp; 836 837 if ((filter->type != DMXDEV_TYPE_PES) || 838 (filter->state < DMXDEV_STATE_SET)) 839 return -EINVAL; 840 841 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) { 842 if ((feed->pid == pid) && (feed->ts != NULL)) { 843 feed->ts->stop_filtering(feed->ts); 844 filter->dev->demux->release_ts_feed(filter->dev->demux, 845 feed->ts); 846 list_del(&feed->next); 847 kfree(feed); 848 } 849 } 850 851 return 0; 852} 853 854static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev, 855 struct dmxdev_filter *dmxdevfilter, 856 struct dmx_sct_filter_params *params) 857{ 858 dprintk("function : %s\n", __func__); 859 860 dvb_dmxdev_filter_stop(dmxdevfilter); 861 862 dmxdevfilter->type = DMXDEV_TYPE_SEC; 863 memcpy(&dmxdevfilter->params.sec, 864 params, sizeof(struct dmx_sct_filter_params)); 865 invert_mode(&dmxdevfilter->params.sec.filter); 866 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); 867 868 if (params->flags & DMX_IMMEDIATE_START) 869 return dvb_dmxdev_filter_start(dmxdevfilter); 870 871 return 0; 872} 873 874static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev, 875 struct dmxdev_filter *dmxdevfilter, 876 struct dmx_pes_filter_params *params) 877{ 878 int ret; 879 880 dvb_dmxdev_filter_stop(dmxdevfilter); 881 dvb_dmxdev_filter_reset(dmxdevfilter); 882 883 if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0) 884 return -EINVAL; 885 886 dmxdevfilter->type = DMXDEV_TYPE_PES; 887 memcpy(&dmxdevfilter->params, params, 888 sizeof(struct dmx_pes_filter_params)); 889 INIT_LIST_HEAD(&dmxdevfilter->feed.ts); 890 891 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); 892 893 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, 894 dmxdevfilter->params.pes.pid); 895 if (ret < 0) 896 return ret; 897 898 if (params->flags & DMX_IMMEDIATE_START) 899 return dvb_dmxdev_filter_start(dmxdevfilter); 900 901 return 0; 902} 903 904static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil, 905 struct file *file, char __user *buf, 906 size_t count, loff_t *ppos) 907{ 908 int result, hcount; 909 int done = 0; 910 911 if (dfil->todo <= 0) { 912 hcount = 3 + dfil->todo; 913 if (hcount > count) 914 hcount = count; 915 result = dvb_dmxdev_buffer_read(&dfil->buffer, 916 file->f_flags & O_NONBLOCK, 917 buf, hcount, ppos); 918 if (result < 0) { 919 dfil->todo = 0; 920 return result; 921 } 922 if (copy_from_user(dfil->secheader - dfil->todo, buf, result)) 923 return -EFAULT; 924 buf += result; 925 done = result; 926 count -= result; 927 dfil->todo -= result; 928 if (dfil->todo > -3) 929 return done; 930 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff; 931 if (!count) 932 return done; 933 } 934 if (count > dfil->todo) 935 count = dfil->todo; 936 result = dvb_dmxdev_buffer_read(&dfil->buffer, 937 file->f_flags & O_NONBLOCK, 938 buf, count, ppos); 939 if (result < 0) 940 return result; 941 dfil->todo -= result; 942 return (result + done); 943} 944 945static ssize_t 946dvb_demux_read(struct file *file, char __user *buf, size_t count, 947 loff_t *ppos) 948{ 949 struct dmxdev_filter *dmxdevfilter = file->private_data; 950 int ret; 951 952 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) 953 return -ERESTARTSYS; 954 955 if (dmxdevfilter->type == DMXDEV_TYPE_SEC) 956 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos); 957 else 958 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer, 959 file->f_flags & O_NONBLOCK, 960 buf, count, ppos); 961 962 mutex_unlock(&dmxdevfilter->mutex); 963 return ret; 964} 965 966static int dvb_demux_do_ioctl(struct file *file, 967 unsigned int cmd, void *parg) 968{ 969 struct dmxdev_filter *dmxdevfilter = file->private_data; 970 struct dmxdev *dmxdev = dmxdevfilter->dev; 971 unsigned long arg = (unsigned long)parg; 972 int ret = 0; 973 974 if (mutex_lock_interruptible(&dmxdev->mutex)) 975 return -ERESTARTSYS; 976 977 switch (cmd) { 978 case DMX_START: 979 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 980 mutex_unlock(&dmxdev->mutex); 981 return -ERESTARTSYS; 982 } 983 if (dmxdevfilter->state < DMXDEV_STATE_SET) 984 ret = -EINVAL; 985 else 986 ret = dvb_dmxdev_filter_start(dmxdevfilter); 987 mutex_unlock(&dmxdevfilter->mutex); 988 break; 989 990 case DMX_STOP: 991 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 992 mutex_unlock(&dmxdev->mutex); 993 return -ERESTARTSYS; 994 } 995 ret = dvb_dmxdev_filter_stop(dmxdevfilter); 996 mutex_unlock(&dmxdevfilter->mutex); 997 break; 998 999 case DMX_SET_FILTER: 1000 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 1001 mutex_unlock(&dmxdev->mutex); 1002 return -ERESTARTSYS; 1003 } 1004 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg); 1005 mutex_unlock(&dmxdevfilter->mutex); 1006 break; 1007 1008 case DMX_SET_PES_FILTER: 1009 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 1010 mutex_unlock(&dmxdev->mutex); 1011 return -ERESTARTSYS; 1012 } 1013 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg); 1014 mutex_unlock(&dmxdevfilter->mutex); 1015 break; 1016 1017 case DMX_SET_BUFFER_SIZE: 1018 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 1019 mutex_unlock(&dmxdev->mutex); 1020 return -ERESTARTSYS; 1021 } 1022 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg); 1023 mutex_unlock(&dmxdevfilter->mutex); 1024 break; 1025 1026 case DMX_GET_PES_PIDS: 1027 if (!dmxdev->demux->get_pes_pids) { 1028 ret = -EINVAL; 1029 break; 1030 } 1031 dmxdev->demux->get_pes_pids(dmxdev->demux, parg); 1032 break; 1033 1034 case DMX_GET_CAPS: 1035 if (!dmxdev->demux->get_caps) { 1036 ret = -EINVAL; 1037 break; 1038 } 1039 ret = dmxdev->demux->get_caps(dmxdev->demux, parg); 1040 break; 1041 1042 case DMX_SET_SOURCE: 1043 if (!dmxdev->demux->set_source) { 1044 ret = -EINVAL; 1045 break; 1046 } 1047 ret = dmxdev->demux->set_source(dmxdev->demux, parg); 1048 break; 1049 1050 case DMX_GET_STC: 1051 if (!dmxdev->demux->get_stc) { 1052 ret = -EINVAL; 1053 break; 1054 } 1055 ret = dmxdev->demux->get_stc(dmxdev->demux, 1056 ((struct dmx_stc *)parg)->num, 1057 &((struct dmx_stc *)parg)->stc, 1058 &((struct dmx_stc *)parg)->base); 1059 break; 1060 1061 case DMX_ADD_PID: 1062 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 1063 ret = -ERESTARTSYS; 1064 break; 1065 } 1066 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg); 1067 mutex_unlock(&dmxdevfilter->mutex); 1068 break; 1069 1070 case DMX_REMOVE_PID: 1071 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { 1072 ret = -ERESTARTSYS; 1073 break; 1074 } 1075 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg); 1076 mutex_unlock(&dmxdevfilter->mutex); 1077 break; 1078 1079 default: 1080 ret = -EINVAL; 1081 break; 1082 } 1083 mutex_unlock(&dmxdev->mutex); 1084 return ret; 1085} 1086 1087static long dvb_demux_ioctl(struct file *file, unsigned int cmd, 1088 unsigned long arg) 1089{ 1090 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl); 1091} 1092 1093static unsigned int dvb_demux_poll(struct file *file, poll_table *wait) 1094{ 1095 struct dmxdev_filter *dmxdevfilter = file->private_data; 1096 unsigned int mask = 0; 1097 1098 if (!dmxdevfilter) 1099 return -EINVAL; 1100 1101 poll_wait(file, &dmxdevfilter->buffer.queue, wait); 1102 1103 if (dmxdevfilter->state != DMXDEV_STATE_GO && 1104 dmxdevfilter->state != DMXDEV_STATE_DONE && 1105 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT) 1106 return 0; 1107 1108 if (dmxdevfilter->buffer.error) 1109 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR); 1110 1111 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer)) 1112 mask |= (POLLIN | POLLRDNORM | POLLPRI); 1113 1114 return mask; 1115} 1116 1117static int dvb_demux_release(struct inode *inode, struct file *file) 1118{ 1119 struct dmxdev_filter *dmxdevfilter = file->private_data; 1120 struct dmxdev *dmxdev = dmxdevfilter->dev; 1121 1122 int ret; 1123 1124 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter); 1125 1126 mutex_lock(&dmxdev->mutex); 1127 dmxdev->dvbdev->users--; 1128 if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) { 1129 fops_put(file->f_op); 1130 file->f_op = NULL; 1131 mutex_unlock(&dmxdev->mutex); 1132 wake_up(&dmxdev->dvbdev->wait_queue); 1133 } else 1134 mutex_unlock(&dmxdev->mutex); 1135 1136 return ret; 1137} 1138 1139static const struct file_operations dvb_demux_fops = { 1140 .owner = THIS_MODULE, 1141 .read = dvb_demux_read, 1142 .unlocked_ioctl = dvb_demux_ioctl, 1143 .open = dvb_demux_open, 1144 .release = dvb_demux_release, 1145 .poll = dvb_demux_poll, 1146 .llseek = default_llseek, 1147}; 1148 1149static struct dvb_device dvbdev_demux = { 1150 .priv = NULL, 1151 .users = 1, 1152 .writers = 1, 1153 .fops = &dvb_demux_fops 1154}; 1155 1156static int dvb_dvr_do_ioctl(struct file *file, 1157 unsigned int cmd, void *parg) 1158{ 1159 struct dvb_device *dvbdev = file->private_data; 1160 struct dmxdev *dmxdev = dvbdev->priv; 1161 unsigned long arg = (unsigned long)parg; 1162 int ret; 1163 1164 if (mutex_lock_interruptible(&dmxdev->mutex)) 1165 return -ERESTARTSYS; 1166 1167 switch (cmd) { 1168 case DMX_SET_BUFFER_SIZE: 1169 ret = dvb_dvr_set_buffer_size(dmxdev, arg); 1170 break; 1171 1172 default: 1173 ret = -EINVAL; 1174 break; 1175 } 1176 mutex_unlock(&dmxdev->mutex); 1177 return ret; 1178} 1179 1180static long dvb_dvr_ioctl(struct file *file, 1181 unsigned int cmd, unsigned long arg) 1182{ 1183 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl); 1184} 1185 1186static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait) 1187{ 1188 struct dvb_device *dvbdev = file->private_data; 1189 struct dmxdev *dmxdev = dvbdev->priv; 1190 unsigned int mask = 0; 1191 1192 dprintk("function : %s\n", __func__); 1193 1194 poll_wait(file, &dmxdev->dvr_buffer.queue, wait); 1195 1196 if ((file->f_flags & O_ACCMODE) == O_RDONLY) { 1197 if (dmxdev->dvr_buffer.error) 1198 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR); 1199 1200 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer)) 1201 mask |= (POLLIN | POLLRDNORM | POLLPRI); 1202 } else 1203 mask |= (POLLOUT | POLLWRNORM | POLLPRI); 1204 1205 return mask; 1206} 1207 1208static const struct file_operations dvb_dvr_fops = { 1209 .owner = THIS_MODULE, 1210 .read = dvb_dvr_read, 1211 .write = dvb_dvr_write, 1212 .unlocked_ioctl = dvb_dvr_ioctl, 1213 .open = dvb_dvr_open, 1214 .release = dvb_dvr_release, 1215 .poll = dvb_dvr_poll, 1216 .llseek = default_llseek, 1217}; 1218 1219static struct dvb_device dvbdev_dvr = { 1220 .priv = NULL, 1221 .readers = 1, 1222 .users = 1, 1223 .fops = &dvb_dvr_fops 1224}; 1225 1226int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter) 1227{ 1228 int i; 1229 1230 if (dmxdev->demux->open(dmxdev->demux) < 0) 1231 return -EUSERS; 1232 1233 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter)); 1234 if (!dmxdev->filter) 1235 return -ENOMEM; 1236 1237 mutex_init(&dmxdev->mutex); 1238 spin_lock_init(&dmxdev->lock); 1239 for (i = 0; i < dmxdev->filternum; i++) { 1240 dmxdev->filter[i].dev = dmxdev; 1241 dmxdev->filter[i].buffer.data = NULL; 1242 dvb_dmxdev_filter_state_set(&dmxdev->filter[i], 1243 DMXDEV_STATE_FREE); 1244 } 1245 1246 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, 1247 DVB_DEVICE_DEMUX); 1248 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, 1249 dmxdev, DVB_DEVICE_DVR); 1250 1251 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192); 1252 1253 return 0; 1254} 1255 1256EXPORT_SYMBOL(dvb_dmxdev_init); 1257 1258void dvb_dmxdev_release(struct dmxdev *dmxdev) 1259{ 1260 dmxdev->exit=1; 1261 if (dmxdev->dvbdev->users > 1) { 1262 wait_event(dmxdev->dvbdev->wait_queue, 1263 dmxdev->dvbdev->users==1); 1264 } 1265 if (dmxdev->dvr_dvbdev->users > 1) { 1266 wait_event(dmxdev->dvr_dvbdev->wait_queue, 1267 dmxdev->dvr_dvbdev->users==1); 1268 } 1269 1270 dvb_unregister_device(dmxdev->dvbdev); 1271 dvb_unregister_device(dmxdev->dvr_dvbdev); 1272 1273 vfree(dmxdev->filter); 1274 dmxdev->filter = NULL; 1275 dmxdev->demux->close(dmxdev->demux); 1276} 1277 1278EXPORT_SYMBOL(dvb_dmxdev_release); 1279