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1// SPDX-License-Identifier: LGPL-2.1-or-later2/*3 * dmxdev.c - DVB demultiplexer device4 *5 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler6 * for convergence integrated media GmbH7 */8 9#define pr_fmt(fmt) "dmxdev: " fmt10 11#include <linux/sched.h>12#include <linux/spinlock.h>13#include <linux/slab.h>14#include <linux/vmalloc.h>15#include <linux/module.h>16#include <linux/poll.h>17#include <linux/ioctl.h>18#include <linux/wait.h>19#include <linux/uaccess.h>20#include <media/dmxdev.h>21#include <media/dvb_vb2.h>22 23static int debug;24 25module_param(debug, int, 0644);26MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");27 28#define dprintk(fmt, arg...) do { \29 if (debug) \30 printk(KERN_DEBUG pr_fmt("%s: " fmt), \31 __func__, ##arg); \32} while (0)33 34static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,35 const u8 *src, size_t len)36{37 ssize_t free;38 39 if (!len)40 return 0;41 if (!buf->data)42 return 0;43 44 free = dvb_ringbuffer_free(buf);45 if (len > free) {46 dprintk("buffer overflow\n");47 return -EOVERFLOW;48 }49 50 return dvb_ringbuffer_write(buf, src, len);51}52 53static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,54 int non_blocking, char __user *buf,55 size_t count, loff_t *ppos)56{57 size_t todo;58 ssize_t avail;59 ssize_t ret = 0;60 61 if (!src->data)62 return 0;63 64 if (src->error) {65 ret = src->error;66 dvb_ringbuffer_flush(src);67 return ret;68 }69 70 for (todo = count; todo > 0; todo -= ret) {71 if (non_blocking && dvb_ringbuffer_empty(src)) {72 ret = -EWOULDBLOCK;73 break;74 }75 76 ret = wait_event_interruptible(src->queue,77 !dvb_ringbuffer_empty(src) ||78 (src->error != 0));79 if (ret < 0)80 break;81 82 if (src->error) {83 ret = src->error;84 dvb_ringbuffer_flush(src);85 break;86 }87 88 avail = dvb_ringbuffer_avail(src);89 if (avail > todo)90 avail = todo;91 92 ret = dvb_ringbuffer_read_user(src, buf, avail);93 if (ret < 0)94 break;95 96 buf += ret;97 }98 99 return (count - todo) ? (count - todo) : ret;100}101 102static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)103{104 struct list_head *head, *pos;105 106 head = demux->get_frontends(demux);107 if (!head)108 return NULL;109 list_for_each(pos, head)110 if (DMX_FE_ENTRY(pos)->source == type)111 return DMX_FE_ENTRY(pos);112 113 return NULL;114}115 116static int dvb_dvr_open(struct inode *inode, struct file *file)117{118 struct dvb_device *dvbdev = file->private_data;119 struct dmxdev *dmxdev = dvbdev->priv;120 struct dmx_frontend *front;121 bool need_ringbuffer = false;122 123 dprintk("%s\n", __func__);124 125 if (mutex_lock_interruptible(&dmxdev->mutex))126 return -ERESTARTSYS;127 128 if (dmxdev->exit) {129 mutex_unlock(&dmxdev->mutex);130 return -ENODEV;131 }132 133 dmxdev->may_do_mmap = 0;134 135 /*136 * The logic here is a little tricky due to the ifdef.137 *138 * The ringbuffer is used for both read and mmap.139 *140 * It is not needed, however, on two situations:141 * - Write devices (access with O_WRONLY);142 * - For duplex device nodes, opened with O_RDWR.143 */144 145 if ((file->f_flags & O_ACCMODE) == O_RDONLY)146 need_ringbuffer = true;147 else if ((file->f_flags & O_ACCMODE) == O_RDWR) {148 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {149#ifdef CONFIG_DVB_MMAP150 dmxdev->may_do_mmap = 1;151 need_ringbuffer = true;152#else153 mutex_unlock(&dmxdev->mutex);154 return -EOPNOTSUPP;155#endif156 }157 }158 159 if (need_ringbuffer) {160 void *mem;161 162 if (!dvbdev->readers) {163 mutex_unlock(&dmxdev->mutex);164 return -EBUSY;165 }166 mem = vmalloc(DVR_BUFFER_SIZE);167 if (!mem) {168 mutex_unlock(&dmxdev->mutex);169 return -ENOMEM;170 }171 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);172 if (dmxdev->may_do_mmap)173 dvb_vb2_init(&dmxdev->dvr_vb2_ctx, "dvr",174 file->f_flags & O_NONBLOCK);175 dvbdev->readers--;176 }177 178 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {179 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;180 181 if (!dmxdev->demux->write) {182 mutex_unlock(&dmxdev->mutex);183 return -EOPNOTSUPP;184 }185 186 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);187 188 if (!front) {189 mutex_unlock(&dmxdev->mutex);190 return -EINVAL;191 }192 dmxdev->demux->disconnect_frontend(dmxdev->demux);193 dmxdev->demux->connect_frontend(dmxdev->demux, front);194 }195 dvbdev->users++;196 mutex_unlock(&dmxdev->mutex);197 return 0;198}199 200static int dvb_dvr_release(struct inode *inode, struct file *file)201{202 struct dvb_device *dvbdev = file->private_data;203 struct dmxdev *dmxdev = dvbdev->priv;204 205 mutex_lock(&dmxdev->mutex);206 207 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {208 dmxdev->demux->disconnect_frontend(dmxdev->demux);209 dmxdev->demux->connect_frontend(dmxdev->demux,210 dmxdev->dvr_orig_fe);211 }212 213 if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||214 dmxdev->may_do_mmap) {215 if (dmxdev->may_do_mmap) {216 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))217 dvb_vb2_stream_off(&dmxdev->dvr_vb2_ctx);218 dvb_vb2_release(&dmxdev->dvr_vb2_ctx);219 }220 dvbdev->readers++;221 if (dmxdev->dvr_buffer.data) {222 void *mem = dmxdev->dvr_buffer.data;223 /*memory barrier*/224 mb();225 spin_lock_irq(&dmxdev->lock);226 dmxdev->dvr_buffer.data = NULL;227 spin_unlock_irq(&dmxdev->lock);228 vfree(mem);229 }230 }231 /* TODO */232 dvbdev->users--;233 if (dvbdev->users == 1 && dmxdev->exit == 1) {234 mutex_unlock(&dmxdev->mutex);235 wake_up(&dvbdev->wait_queue);236 } else237 mutex_unlock(&dmxdev->mutex);238 239 return 0;240}241 242static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,243 size_t count, loff_t *ppos)244{245 struct dvb_device *dvbdev = file->private_data;246 struct dmxdev *dmxdev = dvbdev->priv;247 int ret;248 249 if (!dmxdev->demux->write)250 return -EOPNOTSUPP;251 if ((file->f_flags & O_ACCMODE) != O_WRONLY)252 return -EINVAL;253 if (mutex_lock_interruptible(&dmxdev->mutex))254 return -ERESTARTSYS;255 256 if (dmxdev->exit) {257 mutex_unlock(&dmxdev->mutex);258 return -ENODEV;259 }260 ret = dmxdev->demux->write(dmxdev->demux, buf, count);261 mutex_unlock(&dmxdev->mutex);262 return ret;263}264 265static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,266 loff_t *ppos)267{268 struct dvb_device *dvbdev = file->private_data;269 struct dmxdev *dmxdev = dvbdev->priv;270 271 if (dmxdev->exit)272 return -ENODEV;273 274 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,275 file->f_flags & O_NONBLOCK,276 buf, count, ppos);277}278 279static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,280 unsigned long size)281{282 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;283 void *newmem;284 void *oldmem;285 286 dprintk("%s\n", __func__);287 288 if (buf->size == size)289 return 0;290 if (!size)291 return -EINVAL;292 293 newmem = vmalloc(size);294 if (!newmem)295 return -ENOMEM;296 297 oldmem = buf->data;298 299 spin_lock_irq(&dmxdev->lock);300 buf->data = newmem;301 buf->size = size;302 303 /* reset and not flush in case the buffer shrinks */304 dvb_ringbuffer_reset(buf);305 spin_unlock_irq(&dmxdev->lock);306 307 vfree(oldmem);308 309 return 0;310}311 312static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter313 *dmxdevfilter, int state)314{315 spin_lock_irq(&dmxdevfilter->dev->lock);316 dmxdevfilter->state = state;317 spin_unlock_irq(&dmxdevfilter->dev->lock);318}319 320static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,321 unsigned long size)322{323 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;324 void *newmem;325 void *oldmem;326 327 if (buf->size == size)328 return 0;329 if (!size)330 return -EINVAL;331 if (dmxdevfilter->state >= DMXDEV_STATE_GO)332 return -EBUSY;333 334 newmem = vmalloc(size);335 if (!newmem)336 return -ENOMEM;337 338 oldmem = buf->data;339 340 spin_lock_irq(&dmxdevfilter->dev->lock);341 buf->data = newmem;342 buf->size = size;343 344 /* reset and not flush in case the buffer shrinks */345 dvb_ringbuffer_reset(buf);346 spin_unlock_irq(&dmxdevfilter->dev->lock);347 348 vfree(oldmem);349 350 return 0;351}352 353static void dvb_dmxdev_filter_timeout(struct timer_list *t)354{355 struct dmxdev_filter *dmxdevfilter = from_timer(dmxdevfilter, t, timer);356 357 dmxdevfilter->buffer.error = -ETIMEDOUT;358 spin_lock_irq(&dmxdevfilter->dev->lock);359 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;360 spin_unlock_irq(&dmxdevfilter->dev->lock);361 wake_up(&dmxdevfilter->buffer.queue);362}363 364static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)365{366 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;367 368 del_timer(&dmxdevfilter->timer);369 if (para->timeout) {370 dmxdevfilter->timer.expires =371 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;372 add_timer(&dmxdevfilter->timer);373 }374}375 376static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,377 const u8 *buffer2, size_t buffer2_len,378 struct dmx_section_filter *filter,379 u32 *buffer_flags)380{381 struct dmxdev_filter *dmxdevfilter = filter->priv;382 int ret;383 384 if (!dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx) &&385 dmxdevfilter->buffer.error) {386 wake_up(&dmxdevfilter->buffer.queue);387 return 0;388 }389 spin_lock(&dmxdevfilter->dev->lock);390 if (dmxdevfilter->state != DMXDEV_STATE_GO) {391 spin_unlock(&dmxdevfilter->dev->lock);392 return 0;393 }394 del_timer(&dmxdevfilter->timer);395 dprintk("section callback %*ph\n", 6, buffer1);396 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx)) {397 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,398 buffer1, buffer1_len,399 buffer_flags);400 if (ret == buffer1_len)401 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,402 buffer2, buffer2_len,403 buffer_flags);404 } else {405 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,406 buffer1, buffer1_len);407 if (ret == buffer1_len) {408 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,409 buffer2, buffer2_len);410 }411 }412 if (ret < 0)413 dmxdevfilter->buffer.error = ret;414 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)415 dmxdevfilter->state = DMXDEV_STATE_DONE;416 spin_unlock(&dmxdevfilter->dev->lock);417 wake_up(&dmxdevfilter->buffer.queue);418 return 0;419}420 421static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,422 const u8 *buffer2, size_t buffer2_len,423 struct dmx_ts_feed *feed,424 u32 *buffer_flags)425{426 struct dmxdev_filter *dmxdevfilter = feed->priv;427 struct dvb_ringbuffer *buffer;428#ifdef CONFIG_DVB_MMAP429 struct dvb_vb2_ctx *ctx;430#endif431 int ret;432 433 spin_lock(&dmxdevfilter->dev->lock);434 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {435 spin_unlock(&dmxdevfilter->dev->lock);436 return 0;437 }438 439 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP ||440 dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) {441 buffer = &dmxdevfilter->buffer;442#ifdef CONFIG_DVB_MMAP443 ctx = &dmxdevfilter->vb2_ctx;444#endif445 } else {446 buffer = &dmxdevfilter->dev->dvr_buffer;447#ifdef CONFIG_DVB_MMAP448 ctx = &dmxdevfilter->dev->dvr_vb2_ctx;449#endif450 }451 452 if (dvb_vb2_is_streaming(ctx)) {453 ret = dvb_vb2_fill_buffer(ctx, buffer1, buffer1_len,454 buffer_flags);455 if (ret == buffer1_len)456 ret = dvb_vb2_fill_buffer(ctx, buffer2, buffer2_len,457 buffer_flags);458 } else {459 if (buffer->error) {460 spin_unlock(&dmxdevfilter->dev->lock);461 wake_up(&buffer->queue);462 return 0;463 }464 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);465 if (ret == buffer1_len)466 ret = dvb_dmxdev_buffer_write(buffer,467 buffer2, buffer2_len);468 }469 if (ret < 0)470 buffer->error = ret;471 spin_unlock(&dmxdevfilter->dev->lock);472 wake_up(&buffer->queue);473 return 0;474}475 476/* stop feed but only mark the specified filter as stopped (state set) */477static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)478{479 struct dmxdev_feed *feed;480 481 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);482 483 switch (dmxdevfilter->type) {484 case DMXDEV_TYPE_SEC:485 del_timer(&dmxdevfilter->timer);486 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);487 break;488 case DMXDEV_TYPE_PES:489 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)490 feed->ts->stop_filtering(feed->ts);491 break;492 default:493 return -EINVAL;494 }495 return 0;496}497 498/* start feed associated with the specified filter */499static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)500{501 struct dmxdev_feed *feed;502 int ret;503 504 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);505 506 switch (filter->type) {507 case DMXDEV_TYPE_SEC:508 return filter->feed.sec->start_filtering(filter->feed.sec);509 case DMXDEV_TYPE_PES:510 list_for_each_entry(feed, &filter->feed.ts, next) {511 ret = feed->ts->start_filtering(feed->ts);512 if (ret < 0) {513 dvb_dmxdev_feed_stop(filter);514 return ret;515 }516 }517 break;518 default:519 return -EINVAL;520 }521 522 return 0;523}524 525/* restart section feed if it has filters left associated with it,526 otherwise release the feed */527static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)528{529 int i;530 struct dmxdev *dmxdev = filter->dev;531 u16 pid = filter->params.sec.pid;532 533 for (i = 0; i < dmxdev->filternum; i++)534 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&535 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&536 dmxdev->filter[i].params.sec.pid == pid) {537 dvb_dmxdev_feed_start(&dmxdev->filter[i]);538 return 0;539 }540 541 filter->dev->demux->release_section_feed(dmxdev->demux,542 filter->feed.sec);543 544 return 0;545}546 547static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)548{549 struct dmxdev_feed *feed;550 struct dmx_demux *demux;551 552 if (dmxdevfilter->state < DMXDEV_STATE_GO)553 return 0;554 555 switch (dmxdevfilter->type) {556 case DMXDEV_TYPE_SEC:557 if (!dmxdevfilter->feed.sec)558 break;559 dvb_dmxdev_feed_stop(dmxdevfilter);560 if (dmxdevfilter->filter.sec)561 dmxdevfilter->feed.sec->562 release_filter(dmxdevfilter->feed.sec,563 dmxdevfilter->filter.sec);564 dvb_dmxdev_feed_restart(dmxdevfilter);565 dmxdevfilter->feed.sec = NULL;566 break;567 case DMXDEV_TYPE_PES:568 dvb_dmxdev_feed_stop(dmxdevfilter);569 demux = dmxdevfilter->dev->demux;570 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {571 demux->release_ts_feed(demux, feed->ts);572 feed->ts = NULL;573 }574 break;575 default:576 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)577 return 0;578 return -EINVAL;579 }580 581 dvb_ringbuffer_flush(&dmxdevfilter->buffer);582 return 0;583}584 585static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)586{587 struct dmxdev_feed *feed, *tmp;588 589 /* delete all PIDs */590 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {591 list_del(&feed->next);592 kfree(feed);593 }594 595 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));596}597 598static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)599{600 if (dmxdevfilter->state < DMXDEV_STATE_SET)601 return 0;602 603 if (dmxdevfilter->type == DMXDEV_TYPE_PES)604 dvb_dmxdev_delete_pids(dmxdevfilter);605 606 dmxdevfilter->type = DMXDEV_TYPE_NONE;607 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);608 return 0;609}610 611static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,612 struct dmxdev_filter *filter,613 struct dmxdev_feed *feed)614{615 ktime_t timeout = ktime_set(0, 0);616 struct dmx_pes_filter_params *para = &filter->params.pes;617 enum dmx_output otype;618 int ret;619 int ts_type;620 enum dmx_ts_pes ts_pes;621 struct dmx_ts_feed *tsfeed;622 623 feed->ts = NULL;624 otype = para->output;625 626 ts_pes = para->pes_type;627 628 if (ts_pes < DMX_PES_OTHER)629 ts_type = TS_DECODER;630 else631 ts_type = 0;632 633 if (otype == DMX_OUT_TS_TAP)634 ts_type |= TS_PACKET;635 else if (otype == DMX_OUT_TSDEMUX_TAP)636 ts_type |= TS_PACKET | TS_DEMUX;637 else if (otype == DMX_OUT_TAP)638 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;639 640 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,641 dvb_dmxdev_ts_callback);642 if (ret < 0)643 return ret;644 645 tsfeed = feed->ts;646 tsfeed->priv = filter;647 648 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);649 if (ret < 0) {650 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);651 return ret;652 }653 654 ret = tsfeed->start_filtering(tsfeed);655 if (ret < 0) {656 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);657 return ret;658 }659 660 return 0;661}662 663static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)664{665 struct dmxdev *dmxdev = filter->dev;666 struct dmxdev_feed *feed;667 void *mem;668 int ret, i;669 670 if (filter->state < DMXDEV_STATE_SET)671 return -EINVAL;672 673 if (filter->state >= DMXDEV_STATE_GO)674 dvb_dmxdev_filter_stop(filter);675 676 if (!filter->buffer.data) {677 mem = vmalloc(filter->buffer.size);678 if (!mem)679 return -ENOMEM;680 spin_lock_irq(&filter->dev->lock);681 filter->buffer.data = mem;682 spin_unlock_irq(&filter->dev->lock);683 }684 685 dvb_ringbuffer_flush(&filter->buffer);686 687 switch (filter->type) {688 case DMXDEV_TYPE_SEC:689 {690 struct dmx_sct_filter_params *para = &filter->params.sec;691 struct dmx_section_filter **secfilter = &filter->filter.sec;692 struct dmx_section_feed **secfeed = &filter->feed.sec;693 694 *secfilter = NULL;695 *secfeed = NULL;696 697 698 /* find active filter/feed with same PID */699 for (i = 0; i < dmxdev->filternum; i++) {700 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&701 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&702 dmxdev->filter[i].params.sec.pid == para->pid) {703 *secfeed = dmxdev->filter[i].feed.sec;704 break;705 }706 }707 708 /* if no feed found, try to allocate new one */709 if (!*secfeed) {710 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,711 secfeed,712 dvb_dmxdev_section_callback);713 if (!*secfeed) {714 pr_err("DVB (%s): could not alloc feed\n",715 __func__);716 return ret;717 }718 719 ret = (*secfeed)->set(*secfeed, para->pid,720 (para->flags & DMX_CHECK_CRC) ? 1 : 0);721 if (ret < 0) {722 pr_err("DVB (%s): could not set feed\n",723 __func__);724 dvb_dmxdev_feed_restart(filter);725 return ret;726 }727 } else {728 dvb_dmxdev_feed_stop(filter);729 }730 731 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);732 if (ret < 0) {733 dvb_dmxdev_feed_restart(filter);734 filter->feed.sec->start_filtering(*secfeed);735 dprintk("could not get filter\n");736 return ret;737 }738 739 (*secfilter)->priv = filter;740 741 memcpy(&((*secfilter)->filter_value[3]),742 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);743 memcpy(&(*secfilter)->filter_mask[3],744 ¶->filter.mask[1], DMX_FILTER_SIZE - 1);745 memcpy(&(*secfilter)->filter_mode[3],746 ¶->filter.mode[1], DMX_FILTER_SIZE - 1);747 748 (*secfilter)->filter_value[0] = para->filter.filter[0];749 (*secfilter)->filter_mask[0] = para->filter.mask[0];750 (*secfilter)->filter_mode[0] = para->filter.mode[0];751 (*secfilter)->filter_mask[1] = 0;752 (*secfilter)->filter_mask[2] = 0;753 754 filter->todo = 0;755 756 ret = filter->feed.sec->start_filtering(filter->feed.sec);757 if (ret < 0)758 return ret;759 760 dvb_dmxdev_filter_timer(filter);761 break;762 }763 case DMXDEV_TYPE_PES:764 list_for_each_entry(feed, &filter->feed.ts, next) {765 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);766 if (ret < 0) {767 dvb_dmxdev_filter_stop(filter);768 return ret;769 }770 }771 break;772 default:773 return -EINVAL;774 }775 776 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);777 return 0;778}779 780static int dvb_demux_open(struct inode *inode, struct file *file)781{782 struct dvb_device *dvbdev = file->private_data;783 struct dmxdev *dmxdev = dvbdev->priv;784 int i;785 struct dmxdev_filter *dmxdevfilter;786 787 if (!dmxdev->filter)788 return -EINVAL;789 790 if (mutex_lock_interruptible(&dmxdev->mutex))791 return -ERESTARTSYS;792 793 if (dmxdev->exit) {794 mutex_unlock(&dmxdev->mutex);795 return -ENODEV;796 }797 798 for (i = 0; i < dmxdev->filternum; i++)799 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)800 break;801 802 if (i == dmxdev->filternum) {803 mutex_unlock(&dmxdev->mutex);804 return -EMFILE;805 }806 807 dmxdevfilter = &dmxdev->filter[i];808 mutex_init(&dmxdevfilter->mutex);809 file->private_data = dmxdevfilter;810 811#ifdef CONFIG_DVB_MMAP812 dmxdev->may_do_mmap = 1;813#else814 dmxdev->may_do_mmap = 0;815#endif816 817 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);818 dvb_vb2_init(&dmxdevfilter->vb2_ctx, "demux_filter",819 file->f_flags & O_NONBLOCK);820 dmxdevfilter->type = DMXDEV_TYPE_NONE;821 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);822 timer_setup(&dmxdevfilter->timer, dvb_dmxdev_filter_timeout, 0);823 824 dvbdev->users++;825 826 mutex_unlock(&dmxdev->mutex);827 return 0;828}829 830static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,831 struct dmxdev_filter *dmxdevfilter)832{833 mutex_lock(&dmxdev->mutex);834 mutex_lock(&dmxdevfilter->mutex);835 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))836 dvb_vb2_stream_off(&dmxdevfilter->vb2_ctx);837 dvb_vb2_release(&dmxdevfilter->vb2_ctx);838 839 840 dvb_dmxdev_filter_stop(dmxdevfilter);841 dvb_dmxdev_filter_reset(dmxdevfilter);842 843 if (dmxdevfilter->buffer.data) {844 void *mem = dmxdevfilter->buffer.data;845 846 spin_lock_irq(&dmxdev->lock);847 dmxdevfilter->buffer.data = NULL;848 spin_unlock_irq(&dmxdev->lock);849 vfree(mem);850 }851 852 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);853 wake_up(&dmxdevfilter->buffer.queue);854 mutex_unlock(&dmxdevfilter->mutex);855 mutex_unlock(&dmxdev->mutex);856 return 0;857}858 859static inline void invert_mode(struct dmx_filter *filter)860{861 int i;862 863 for (i = 0; i < DMX_FILTER_SIZE; i++)864 filter->mode[i] ^= 0xff;865}866 867static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,868 struct dmxdev_filter *filter, u16 pid)869{870 struct dmxdev_feed *feed;871 872 if ((filter->type != DMXDEV_TYPE_PES) ||873 (filter->state < DMXDEV_STATE_SET))874 return -EINVAL;875 876 /* only TS packet filters may have multiple PIDs */877 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&878 (!list_empty(&filter->feed.ts)))879 return -EINVAL;880 881 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);882 if (feed == NULL)883 return -ENOMEM;884 885 feed->pid = pid;886 list_add(&feed->next, &filter->feed.ts);887 888 if (filter->state >= DMXDEV_STATE_GO)889 return dvb_dmxdev_start_feed(dmxdev, filter, feed);890 891 return 0;892}893 894static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,895 struct dmxdev_filter *filter, u16 pid)896{897 struct dmxdev_feed *feed, *tmp;898 899 if ((filter->type != DMXDEV_TYPE_PES) ||900 (filter->state < DMXDEV_STATE_SET))901 return -EINVAL;902 903 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {904 if ((feed->pid == pid) && (feed->ts != NULL)) {905 feed->ts->stop_filtering(feed->ts);906 filter->dev->demux->release_ts_feed(filter->dev->demux,907 feed->ts);908 list_del(&feed->next);909 kfree(feed);910 }911 }912 913 return 0;914}915 916static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,917 struct dmxdev_filter *dmxdevfilter,918 struct dmx_sct_filter_params *params)919{920 dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",921 __func__, params->pid, params->flags, params->timeout);922 923 dvb_dmxdev_filter_stop(dmxdevfilter);924 925 dmxdevfilter->type = DMXDEV_TYPE_SEC;926 memcpy(&dmxdevfilter->params.sec,927 params, sizeof(struct dmx_sct_filter_params));928 invert_mode(&dmxdevfilter->params.sec.filter);929 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);930 931 if (params->flags & DMX_IMMEDIATE_START)932 return dvb_dmxdev_filter_start(dmxdevfilter);933 934 return 0;935}936 937static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,938 struct dmxdev_filter *dmxdevfilter,939 struct dmx_pes_filter_params *params)940{941 int ret;942 943 dvb_dmxdev_filter_stop(dmxdevfilter);944 dvb_dmxdev_filter_reset(dmxdevfilter);945 946 if ((unsigned int)params->pes_type > DMX_PES_OTHER)947 return -EINVAL;948 949 dmxdevfilter->type = DMXDEV_TYPE_PES;950 memcpy(&dmxdevfilter->params, params,951 sizeof(struct dmx_pes_filter_params));952 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);953 954 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);955 956 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,957 dmxdevfilter->params.pes.pid);958 if (ret < 0)959 return ret;960 961 if (params->flags & DMX_IMMEDIATE_START)962 return dvb_dmxdev_filter_start(dmxdevfilter);963 964 return 0;965}966 967static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,968 struct file *file, char __user *buf,969 size_t count, loff_t *ppos)970{971 int result, hcount;972 int done = 0;973 974 if (dfil->todo <= 0) {975 hcount = 3 + dfil->todo;976 if (hcount > count)977 hcount = count;978 result = dvb_dmxdev_buffer_read(&dfil->buffer,979 file->f_flags & O_NONBLOCK,980 buf, hcount, ppos);981 if (result < 0) {982 dfil->todo = 0;983 return result;984 }985 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))986 return -EFAULT;987 buf += result;988 done = result;989 count -= result;990 dfil->todo -= result;991 if (dfil->todo > -3)992 return done;993 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;994 if (!count)995 return done;996 }997 if (count > dfil->todo)998 count = dfil->todo;999 result = dvb_dmxdev_buffer_read(&dfil->buffer,1000 file->f_flags & O_NONBLOCK,1001 buf, count, ppos);1002 if (result < 0)1003 return result;1004 dfil->todo -= result;1005 return (result + done);1006}1007 1008static ssize_t1009dvb_demux_read(struct file *file, char __user *buf, size_t count,1010 loff_t *ppos)1011{1012 struct dmxdev_filter *dmxdevfilter = file->private_data;1013 int ret;1014 1015 if (mutex_lock_interruptible(&dmxdevfilter->mutex))1016 return -ERESTARTSYS;1017 1018 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)1019 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);1020 else1021 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,1022 file->f_flags & O_NONBLOCK,1023 buf, count, ppos);1024 1025 mutex_unlock(&dmxdevfilter->mutex);1026 return ret;1027}1028 1029static int dvb_demux_do_ioctl(struct file *file,1030 unsigned int cmd, void *parg)1031{1032 struct dmxdev_filter *dmxdevfilter = file->private_data;1033 struct dmxdev *dmxdev = dmxdevfilter->dev;1034 unsigned long arg = (unsigned long)parg;1035 int ret = 0;1036 1037 if (mutex_lock_interruptible(&dmxdev->mutex))1038 return -ERESTARTSYS;1039 1040 switch (cmd) {1041 case DMX_START:1042 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1043 mutex_unlock(&dmxdev->mutex);1044 return -ERESTARTSYS;1045 }1046 if (dmxdevfilter->state < DMXDEV_STATE_SET)1047 ret = -EINVAL;1048 else1049 ret = dvb_dmxdev_filter_start(dmxdevfilter);1050 mutex_unlock(&dmxdevfilter->mutex);1051 break;1052 1053 case DMX_STOP:1054 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1055 mutex_unlock(&dmxdev->mutex);1056 return -ERESTARTSYS;1057 }1058 ret = dvb_dmxdev_filter_stop(dmxdevfilter);1059 mutex_unlock(&dmxdevfilter->mutex);1060 break;1061 1062 case DMX_SET_FILTER:1063 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1064 mutex_unlock(&dmxdev->mutex);1065 return -ERESTARTSYS;1066 }1067 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);1068 mutex_unlock(&dmxdevfilter->mutex);1069 break;1070 1071 case DMX_SET_PES_FILTER:1072 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1073 mutex_unlock(&dmxdev->mutex);1074 return -ERESTARTSYS;1075 }1076 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);1077 mutex_unlock(&dmxdevfilter->mutex);1078 break;1079 1080 case DMX_SET_BUFFER_SIZE:1081 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1082 mutex_unlock(&dmxdev->mutex);1083 return -ERESTARTSYS;1084 }1085 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);1086 mutex_unlock(&dmxdevfilter->mutex);1087 break;1088 1089 case DMX_GET_PES_PIDS:1090 if (!dmxdev->demux->get_pes_pids) {1091 ret = -EINVAL;1092 break;1093 }1094 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);1095 break;1096 1097 case DMX_GET_STC:1098 if (!dmxdev->demux->get_stc) {1099 ret = -EINVAL;1100 break;1101 }1102 ret = dmxdev->demux->get_stc(dmxdev->demux,1103 ((struct dmx_stc *)parg)->num,1104 &((struct dmx_stc *)parg)->stc,1105 &((struct dmx_stc *)parg)->base);1106 break;1107 1108 case DMX_ADD_PID:1109 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1110 ret = -ERESTARTSYS;1111 break;1112 }1113 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);1114 mutex_unlock(&dmxdevfilter->mutex);1115 break;1116 1117 case DMX_REMOVE_PID:1118 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1119 ret = -ERESTARTSYS;1120 break;1121 }1122 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);1123 mutex_unlock(&dmxdevfilter->mutex);1124 break;1125 1126#ifdef CONFIG_DVB_MMAP1127 case DMX_REQBUFS:1128 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1129 mutex_unlock(&dmxdev->mutex);1130 return -ERESTARTSYS;1131 }1132 ret = dvb_vb2_reqbufs(&dmxdevfilter->vb2_ctx, parg);1133 mutex_unlock(&dmxdevfilter->mutex);1134 break;1135 1136 case DMX_QUERYBUF:1137 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1138 mutex_unlock(&dmxdev->mutex);1139 return -ERESTARTSYS;1140 }1141 ret = dvb_vb2_querybuf(&dmxdevfilter->vb2_ctx, parg);1142 mutex_unlock(&dmxdevfilter->mutex);1143 break;1144 1145 case DMX_EXPBUF:1146 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1147 mutex_unlock(&dmxdev->mutex);1148 return -ERESTARTSYS;1149 }1150 ret = dvb_vb2_expbuf(&dmxdevfilter->vb2_ctx, parg);1151 mutex_unlock(&dmxdevfilter->mutex);1152 break;1153 1154 case DMX_QBUF:1155 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1156 mutex_unlock(&dmxdev->mutex);1157 return -ERESTARTSYS;1158 }1159 ret = dvb_vb2_qbuf(&dmxdevfilter->vb2_ctx, parg);1160 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))1161 ret = dvb_vb2_stream_on(&dmxdevfilter->vb2_ctx);1162 mutex_unlock(&dmxdevfilter->mutex);1163 break;1164 1165 case DMX_DQBUF:1166 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1167 mutex_unlock(&dmxdev->mutex);1168 return -ERESTARTSYS;1169 }1170 ret = dvb_vb2_dqbuf(&dmxdevfilter->vb2_ctx, parg);1171 mutex_unlock(&dmxdevfilter->mutex);1172 break;1173#endif1174 default:1175 ret = -ENOTTY;1176 break;1177 }1178 mutex_unlock(&dmxdev->mutex);1179 return ret;1180}1181 1182static long dvb_demux_ioctl(struct file *file, unsigned int cmd,1183 unsigned long arg)1184{1185 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);1186}1187 1188static __poll_t dvb_demux_poll(struct file *file, poll_table *wait)1189{1190 struct dmxdev_filter *dmxdevfilter = file->private_data;1191 __poll_t mask = 0;1192 1193 poll_wait(file, &dmxdevfilter->buffer.queue, wait);1194 1195 if ((!dmxdevfilter) || dmxdevfilter->dev->exit)1196 return EPOLLERR;1197 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))1198 return dvb_vb2_poll(&dmxdevfilter->vb2_ctx, file, wait);1199 1200 if (dmxdevfilter->state != DMXDEV_STATE_GO &&1201 dmxdevfilter->state != DMXDEV_STATE_DONE &&1202 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)1203 return 0;1204 1205 if (dmxdevfilter->buffer.error)1206 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);1207 1208 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))1209 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);1210 1211 return mask;1212}1213 1214#ifdef CONFIG_DVB_MMAP1215static int dvb_demux_mmap(struct file *file, struct vm_area_struct *vma)1216{1217 struct dmxdev_filter *dmxdevfilter = file->private_data;1218 struct dmxdev *dmxdev = dmxdevfilter->dev;1219 int ret;1220 1221 if (!dmxdev->may_do_mmap)1222 return -ENOTTY;1223 1224 if (mutex_lock_interruptible(&dmxdev->mutex))1225 return -ERESTARTSYS;1226 1227 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {1228 mutex_unlock(&dmxdev->mutex);1229 return -ERESTARTSYS;1230 }1231 ret = dvb_vb2_mmap(&dmxdevfilter->vb2_ctx, vma);1232 1233 mutex_unlock(&dmxdevfilter->mutex);1234 mutex_unlock(&dmxdev->mutex);1235 1236 return ret;1237}1238#endif1239 1240static int dvb_demux_release(struct inode *inode, struct file *file)1241{1242 struct dmxdev_filter *dmxdevfilter = file->private_data;1243 struct dmxdev *dmxdev = dmxdevfilter->dev;1244 int ret;1245 1246 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);1247 1248 mutex_lock(&dmxdev->mutex);1249 dmxdev->dvbdev->users--;1250 if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {1251 mutex_unlock(&dmxdev->mutex);1252 wake_up(&dmxdev->dvbdev->wait_queue);1253 } else1254 mutex_unlock(&dmxdev->mutex);1255 1256 return ret;1257}1258 1259static const struct file_operations dvb_demux_fops = {1260 .owner = THIS_MODULE,1261 .read = dvb_demux_read,1262 .unlocked_ioctl = dvb_demux_ioctl,1263 .compat_ioctl = dvb_demux_ioctl,1264 .open = dvb_demux_open,1265 .release = dvb_demux_release,1266 .poll = dvb_demux_poll,1267 .llseek = default_llseek,1268#ifdef CONFIG_DVB_MMAP1269 .mmap = dvb_demux_mmap,1270#endif1271};1272 1273static const struct dvb_device dvbdev_demux = {1274 .priv = NULL,1275 .users = 1,1276 .writers = 1,1277#if defined(CONFIG_MEDIA_CONTROLLER_DVB)1278 .name = "dvb-demux",1279#endif1280 .fops = &dvb_demux_fops1281};1282 1283static int dvb_dvr_do_ioctl(struct file *file,1284 unsigned int cmd, void *parg)1285{1286 struct dvb_device *dvbdev = file->private_data;1287 struct dmxdev *dmxdev = dvbdev->priv;1288 unsigned long arg = (unsigned long)parg;1289 int ret;1290 1291 if (mutex_lock_interruptible(&dmxdev->mutex))1292 return -ERESTARTSYS;1293 1294 switch (cmd) {1295 case DMX_SET_BUFFER_SIZE:1296 ret = dvb_dvr_set_buffer_size(dmxdev, arg);1297 break;1298 1299#ifdef CONFIG_DVB_MMAP1300 case DMX_REQBUFS:1301 ret = dvb_vb2_reqbufs(&dmxdev->dvr_vb2_ctx, parg);1302 break;1303 1304 case DMX_QUERYBUF:1305 ret = dvb_vb2_querybuf(&dmxdev->dvr_vb2_ctx, parg);1306 break;1307 1308 case DMX_EXPBUF:1309 ret = dvb_vb2_expbuf(&dmxdev->dvr_vb2_ctx, parg);1310 break;1311 1312 case DMX_QBUF:1313 ret = dvb_vb2_qbuf(&dmxdev->dvr_vb2_ctx, parg);1314 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))1315 ret = dvb_vb2_stream_on(&dmxdev->dvr_vb2_ctx);1316 break;1317 1318 case DMX_DQBUF:1319 ret = dvb_vb2_dqbuf(&dmxdev->dvr_vb2_ctx, parg);1320 break;1321#endif1322 default:1323 ret = -ENOTTY;1324 break;1325 }1326 mutex_unlock(&dmxdev->mutex);1327 return ret;1328}1329 1330static long dvb_dvr_ioctl(struct file *file,1331 unsigned int cmd, unsigned long arg)1332{1333 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);1334}1335 1336static __poll_t dvb_dvr_poll(struct file *file, poll_table *wait)1337{1338 struct dvb_device *dvbdev = file->private_data;1339 struct dmxdev *dmxdev = dvbdev->priv;1340 __poll_t mask = 0;1341 1342 dprintk("%s\n", __func__);1343 1344 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);1345 1346 if (dmxdev->exit)1347 return EPOLLERR;1348 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))1349 return dvb_vb2_poll(&dmxdev->dvr_vb2_ctx, file, wait);1350 1351 if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||1352 dmxdev->may_do_mmap) {1353 if (dmxdev->dvr_buffer.error)1354 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);1355 1356 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))1357 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);1358 } else1359 mask |= (EPOLLOUT | EPOLLWRNORM | EPOLLPRI);1360 1361 return mask;1362}1363 1364#ifdef CONFIG_DVB_MMAP1365static int dvb_dvr_mmap(struct file *file, struct vm_area_struct *vma)1366{1367 struct dvb_device *dvbdev = file->private_data;1368 struct dmxdev *dmxdev = dvbdev->priv;1369 int ret;1370 1371 if (!dmxdev->may_do_mmap)1372 return -ENOTTY;1373 1374 if (dmxdev->exit)1375 return -ENODEV;1376 1377 if (mutex_lock_interruptible(&dmxdev->mutex))1378 return -ERESTARTSYS;1379 1380 ret = dvb_vb2_mmap(&dmxdev->dvr_vb2_ctx, vma);1381 mutex_unlock(&dmxdev->mutex);1382 return ret;1383}1384#endif1385 1386static const struct file_operations dvb_dvr_fops = {1387 .owner = THIS_MODULE,1388 .read = dvb_dvr_read,1389 .write = dvb_dvr_write,1390 .unlocked_ioctl = dvb_dvr_ioctl,1391 .open = dvb_dvr_open,1392 .release = dvb_dvr_release,1393 .poll = dvb_dvr_poll,1394 .llseek = default_llseek,1395#ifdef CONFIG_DVB_MMAP1396 .mmap = dvb_dvr_mmap,1397#endif1398};1399 1400static const struct dvb_device dvbdev_dvr = {1401 .priv = NULL,1402 .readers = 1,1403 .users = 1,1404#if defined(CONFIG_MEDIA_CONTROLLER_DVB)1405 .name = "dvb-dvr",1406#endif1407 .fops = &dvb_dvr_fops1408};1409int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)1410{1411 int i, ret;1412 1413 if (dmxdev->demux->open(dmxdev->demux) < 0)1414 return -EUSERS;1415 1416 dmxdev->filter = vmalloc(array_size(sizeof(struct dmxdev_filter),1417 dmxdev->filternum));1418 if (!dmxdev->filter)1419 return -ENOMEM;1420 1421 mutex_init(&dmxdev->mutex);1422 spin_lock_init(&dmxdev->lock);1423 for (i = 0; i < dmxdev->filternum; i++) {1424 dmxdev->filter[i].dev = dmxdev;1425 dmxdev->filter[i].buffer.data = NULL;1426 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],1427 DMXDEV_STATE_FREE);1428 }1429 1430 ret = dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,1431 DVB_DEVICE_DEMUX, dmxdev->filternum);1432 if (ret < 0)1433 goto err_register_dvbdev;1434 1435 ret = dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,1436 dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);1437 if (ret < 0)1438 goto err_register_dvr_dvbdev;1439 1440 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);1441 1442 return 0;1443 1444err_register_dvr_dvbdev:1445 dvb_unregister_device(dmxdev->dvbdev);1446err_register_dvbdev:1447 vfree(dmxdev->filter);1448 dmxdev->filter = NULL;1449 return ret;1450}1451 1452EXPORT_SYMBOL(dvb_dmxdev_init);1453 1454void dvb_dmxdev_release(struct dmxdev *dmxdev)1455{1456 mutex_lock(&dmxdev->mutex);1457 dmxdev->exit = 1;1458 mutex_unlock(&dmxdev->mutex);1459 1460 if (dmxdev->dvbdev->users > 1) {1461 wait_event(dmxdev->dvbdev->wait_queue,1462 dmxdev->dvbdev->users == 1);1463 }1464 if (dmxdev->dvr_dvbdev->users > 1) {1465 wait_event(dmxdev->dvr_dvbdev->wait_queue,1466 dmxdev->dvr_dvbdev->users == 1);1467 }1468 1469 dvb_unregister_device(dmxdev->dvbdev);1470 dvb_unregister_device(dmxdev->dvr_dvbdev);1471 1472 vfree(dmxdev->filter);1473 dmxdev->filter = NULL;1474 dmxdev->demux->close(dmxdev->demux);1475}1476 1477EXPORT_SYMBOL(dvb_dmxdev_release);1478