blob: abff803ad69a7e9e55818e5fd42d04ff475cd2d5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * dmxdev.c - DVB demultiplexer device
3 *
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03004 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
5 * for convergence integrated media GmbH
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
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
Alexey Dobriyana99bbaf2009-10-04 16:11:37 +040023#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/spinlock.h>
25#include <linux/slab.h>
26#include <linux/vmalloc.h>
27#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/poll.h>
29#include <linux/ioctl.h>
30#include <linux/wait.h>
31#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "dmxdev.h"
33
34static int debug;
35
36module_param(debug, int, 0644);
37MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
38
39#define dprintk if (debug) printk
40
Andreas Oberritter34731df2006-03-14 17:31:01 -030041static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
42 const u8 *src, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043{
Andreas Oberritter34731df2006-03-14 17:31:01 -030044 ssize_t free;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 if (!len)
47 return 0;
48 if (!buf->data)
49 return 0;
50
Andreas Oberritter34731df2006-03-14 17:31:01 -030051 free = dvb_ringbuffer_free(buf);
52 if (len > free) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 dprintk("dmxdev: buffer overflow\n");
Andreas Oberritter34731df2006-03-14 17:31:01 -030054 return -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 }
Andreas Oberritter34731df2006-03-14 17:31:01 -030056
57 return dvb_ringbuffer_write(buf, src, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
Andreas Oberritter34731df2006-03-14 17:31:01 -030060static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -030061 int non_blocking, char __user *buf,
62 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Andreas Oberritter34731df2006-03-14 17:31:01 -030064 size_t todo;
65 ssize_t avail;
66 ssize_t ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68 if (!src->data)
69 return 0;
70
Andreas Oberritter34731df2006-03-14 17:31:01 -030071 if (src->error) {
72 ret = src->error;
73 dvb_ringbuffer_flush(src);
74 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 }
76
Andreas Oberritter34731df2006-03-14 17:31:01 -030077 for (todo = count; todo > 0; todo -= ret) {
78 if (non_blocking && dvb_ringbuffer_empty(src)) {
79 ret = -EWOULDBLOCK;
80 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 }
82
Andreas Oberritter34731df2006-03-14 17:31:01 -030083 ret = wait_event_interruptible(src->queue,
84 !dvb_ringbuffer_empty(src) ||
85 (src->error != 0));
86 if (ret < 0)
87 break;
88
89 if (src->error) {
90 ret = src->error;
91 dvb_ringbuffer_flush(src);
92 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 }
Andreas Oberritter34731df2006-03-14 17:31:01 -030094
95 avail = dvb_ringbuffer_avail(src);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -030096 if (avail > todo)
97 avail = todo;
Andreas Oberritter34731df2006-03-14 17:31:01 -030098
Al Virob0ba0e32008-06-22 14:20:29 -030099 ret = dvb_ringbuffer_read_user(src, buf, avail);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300100 if (ret < 0)
101 break;
102
103 buf += ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300105
106 return (count - todo) ? (count - todo) : ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107}
108
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300109static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
111 struct list_head *head, *pos;
112
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300113 head = demux->get_frontends(demux);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 if (!head)
115 return NULL;
116 list_for_each(pos, head)
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300117 if (DMX_FE_ENTRY(pos)->source == type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 return DMX_FE_ENTRY(pos);
119
120 return NULL;
121}
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static int dvb_dvr_open(struct inode *inode, struct file *file)
124{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700125 struct dvb_device *dvbdev = file->private_data;
126 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 struct dmx_frontend *front;
128
Harvey Harrison46b4f7c2008-04-08 23:20:00 -0300129 dprintk("function : %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Ingo Molnar3593cab2006-02-07 06:49:14 -0200131 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 return -ERESTARTSYS;
133
Markus Rechberger57861b42007-04-14 10:19:18 -0300134 if (dmxdev->exit) {
135 mutex_unlock(&dmxdev->mutex);
136 return -ENODEV;
137 }
138
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300139 if ((file->f_flags & O_ACCMODE) == O_RDWR) {
140 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200141 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 return -EOPNOTSUPP;
143 }
144 }
145
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300146 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
Trent Piepho5e85bd02006-03-30 15:53:32 -0300147 void *mem;
148 if (!dvbdev->readers) {
149 mutex_unlock(&dmxdev->mutex);
150 return -EBUSY;
151 }
152 mem = vmalloc(DVR_BUFFER_SIZE);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300153 if (!mem) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300154 mutex_unlock(&dmxdev->mutex);
155 return -ENOMEM;
156 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300157 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
Trent Piepho5e85bd02006-03-30 15:53:32 -0300158 dvbdev->readers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
160
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300161 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
162 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 if (!dmxdev->demux->write) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200165 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 return -EOPNOTSUPP;
167 }
168
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300169 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 if (!front) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200172 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return -EINVAL;
174 }
175 dmxdev->demux->disconnect_frontend(dmxdev->demux);
176 dmxdev->demux->connect_frontend(dmxdev->demux, front);
177 }
Markus Rechberger57861b42007-04-14 10:19:18 -0300178 dvbdev->users++;
Ingo Molnar3593cab2006-02-07 06:49:14 -0200179 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return 0;
181}
182
183static int dvb_dvr_release(struct inode *inode, struct file *file)
184{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700185 struct dvb_device *dvbdev = file->private_data;
186 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Simon Arlottc2788502007-03-10 06:21:25 -0300188 mutex_lock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300190 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 dmxdev->demux->disconnect_frontend(dmxdev->demux);
192 dmxdev->demux->connect_frontend(dmxdev->demux,
193 dmxdev->dvr_orig_fe);
194 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300195 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
Trent Piepho5e85bd02006-03-30 15:53:32 -0300196 dvbdev->readers++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 if (dmxdev->dvr_buffer.data) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300198 void *mem = dmxdev->dvr_buffer.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 mb();
200 spin_lock_irq(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300201 dmxdev->dvr_buffer.data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 spin_unlock_irq(&dmxdev->lock);
203 vfree(mem);
204 }
205 }
Markus Rechberger57861b42007-04-14 10:19:18 -0300206 /* TODO */
207 dvbdev->users--;
Jiri Slaby1c488ea2010-07-18 15:34:18 -0300208 if (dvbdev->users == 1 && dmxdev->exit == 1) {
Markus Rechberger57861b42007-04-14 10:19:18 -0300209 mutex_unlock(&dmxdev->mutex);
210 wake_up(&dvbdev->wait_queue);
211 } else
212 mutex_unlock(&dmxdev->mutex);
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return 0;
215}
216
217static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300218 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700220 struct dvb_device *dvbdev = file->private_data;
221 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 int ret;
223
224 if (!dmxdev->demux->write)
225 return -EOPNOTSUPP;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300226 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 return -EINVAL;
Ingo Molnar3593cab2006-02-07 06:49:14 -0200228 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return -ERESTARTSYS;
Markus Rechberger57861b42007-04-14 10:19:18 -0300230
231 if (dmxdev->exit) {
232 mutex_unlock(&dmxdev->mutex);
233 return -ENODEV;
234 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300235 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200236 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 return ret;
238}
239
240static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300241 loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700243 struct dvb_device *dvbdev = file->private_data;
244 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Simon Arlotteda9f752009-05-12 17:39:28 -0300246 if (dmxdev->exit)
Markus Rechberger57861b42007-04-14 10:19:18 -0300247 return -ENODEV;
Markus Rechberger57861b42007-04-14 10:19:18 -0300248
Simon Arlotteda9f752009-05-12 17:39:28 -0300249 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
250 file->f_flags & O_NONBLOCK,
251 buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
Andrea Odettia095be42008-04-20 19:14:51 -0300254static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
255 unsigned long size)
256{
257 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
258 void *newmem;
259 void *oldmem;
260
261 dprintk("function : %s\n", __func__);
262
263 if (buf->size == size)
264 return 0;
265 if (!size)
266 return -EINVAL;
267
268 newmem = vmalloc(size);
269 if (!newmem)
270 return -ENOMEM;
271
272 oldmem = buf->data;
273
274 spin_lock_irq(&dmxdev->lock);
275 buf->data = newmem;
276 buf->size = size;
277
278 /* reset and not flush in case the buffer shrinks */
279 dvb_ringbuffer_reset(buf);
280 spin_unlock_irq(&dmxdev->lock);
281
282 vfree(oldmem);
283
284 return 0;
285}
286
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300287static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
288 *dmxdevfilter, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 spin_lock_irq(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300291 dmxdevfilter->state = state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 spin_unlock_irq(&dmxdevfilter->dev->lock);
293}
294
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300295static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
296 unsigned long size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Andreas Oberritter34731df2006-03-14 17:31:01 -0300298 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
Andrea Odettia095be42008-04-20 19:14:51 -0300299 void *newmem;
300 void *oldmem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300302 if (buf->size == size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 return 0;
Andrea Odettia095be42008-04-20 19:14:51 -0300304 if (!size)
305 return -EINVAL;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300306 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return -EBUSY;
Andrea Odettia095be42008-04-20 19:14:51 -0300308
309 newmem = vmalloc(size);
310 if (!newmem)
311 return -ENOMEM;
312
313 oldmem = buf->data;
314
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 spin_lock_irq(&dmxdevfilter->dev->lock);
Andrea Odettia095be42008-04-20 19:14:51 -0300316 buf->data = newmem;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300317 buf->size = size;
Andrea Odetti48c01a92008-04-20 18:37:45 -0300318
319 /* reset and not flush in case the buffer shrinks */
320 dvb_ringbuffer_reset(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 spin_unlock_irq(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Andrea Odettia095be42008-04-20 19:14:51 -0300323 vfree(oldmem);
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return 0;
326}
327
328static void dvb_dmxdev_filter_timeout(unsigned long data)
329{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300330 struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300332 dmxdevfilter->buffer.error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 spin_lock_irq(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300334 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 spin_unlock_irq(&dmxdevfilter->dev->lock);
336 wake_up(&dmxdevfilter->buffer.queue);
337}
338
339static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
340{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300341 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 del_timer(&dmxdevfilter->timer);
344 if (para->timeout) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300345 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
346 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
347 dmxdevfilter->timer.expires =
348 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 add_timer(&dmxdevfilter->timer);
350 }
351}
352
353static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300354 const u8 *buffer2, size_t buffer2_len,
355 struct dmx_section_filter *filter,
356 enum dmx_success success)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700358 struct dmxdev_filter *dmxdevfilter = filter->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 int ret;
360
361 if (dmxdevfilter->buffer.error) {
362 wake_up(&dmxdevfilter->buffer.queue);
363 return 0;
364 }
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300365 spin_lock(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300366 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300367 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 return 0;
369 }
370 del_timer(&dmxdevfilter->timer);
Andy Shevchenko090fdc12012-08-07 12:43:08 -0300371 dprintk("dmxdev: section callback %*ph\n", 6, buffer1);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300372 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
373 buffer1_len);
374 if (ret == buffer1_len) {
375 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
376 buffer2_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 }
Soeren Moch414abbd2013-06-05 21:26:23 -0300378 if (ret < 0)
Andreas Oberritter34731df2006-03-14 17:31:01 -0300379 dmxdevfilter->buffer.error = ret;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300380 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
381 dmxdevfilter->state = DMXDEV_STATE_DONE;
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300382 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 wake_up(&dmxdevfilter->buffer.queue);
384 return 0;
385}
386
387static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300388 const u8 *buffer2, size_t buffer2_len,
389 struct dmx_ts_feed *feed,
390 enum dmx_success success)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700392 struct dmxdev_filter *dmxdevfilter = feed->priv;
Andreas Oberritter34731df2006-03-14 17:31:01 -0300393 struct dvb_ringbuffer *buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 int ret;
395
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300396 spin_lock(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300397 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300398 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 return 0;
400 }
401
Peter Hartleyb01cd932008-04-22 14:45:36 -0300402 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
403 || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300404 buffer = &dmxdevfilter->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 else
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300406 buffer = &dmxdevfilter->dev->dvr_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 if (buffer->error) {
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300408 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 wake_up(&buffer->queue);
410 return 0;
411 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300412 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
413 if (ret == buffer1_len)
414 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
Soeren Moch414abbd2013-06-05 21:26:23 -0300415 if (ret < 0)
Andreas Oberritter34731df2006-03-14 17:31:01 -0300416 buffer->error = ret;
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300417 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 wake_up(&buffer->queue);
419 return 0;
420}
421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422/* stop feed but only mark the specified filter as stopped (state set) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
424{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300425 struct dmxdev_feed *feed;
426
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
428
429 switch (dmxdevfilter->type) {
430 case DMXDEV_TYPE_SEC:
431 del_timer(&dmxdevfilter->timer);
432 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
433 break;
434 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300435 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
436 feed->ts->stop_filtering(feed->ts);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 break;
438 default:
439 return -EINVAL;
440 }
441 return 0;
442}
443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444/* start feed associated with the specified filter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
446{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300447 struct dmxdev_feed *feed;
448 int ret;
449
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300450 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 switch (filter->type) {
453 case DMXDEV_TYPE_SEC:
454 return filter->feed.sec->start_filtering(filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300456 list_for_each_entry(feed, &filter->feed.ts, next) {
457 ret = feed->ts->start_filtering(feed->ts);
458 if (ret < 0) {
459 dvb_dmxdev_feed_stop(filter);
460 return ret;
461 }
462 }
463 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 default:
465 return -EINVAL;
466 }
467
468 return 0;
469}
470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471/* restart section feed if it has filters left associated with it,
472 otherwise release the feed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
474{
475 int i;
476 struct dmxdev *dmxdev = filter->dev;
477 u16 pid = filter->params.sec.pid;
478
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300479 for (i = 0; i < dmxdev->filternum; i++)
480 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
481 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
482 dmxdev->filter[i].params.sec.pid == pid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
484 return 0;
485 }
486
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300487 filter->dev->demux->release_section_feed(dmxdev->demux,
488 filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490 return 0;
491}
492
493static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
494{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300495 struct dmxdev_feed *feed;
496 struct dmx_demux *demux;
497
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300498 if (dmxdevfilter->state < DMXDEV_STATE_GO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 return 0;
500
501 switch (dmxdevfilter->type) {
502 case DMXDEV_TYPE_SEC:
503 if (!dmxdevfilter->feed.sec)
504 break;
505 dvb_dmxdev_feed_stop(dmxdevfilter);
506 if (dmxdevfilter->filter.sec)
507 dmxdevfilter->feed.sec->
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300508 release_filter(dmxdevfilter->feed.sec,
509 dmxdevfilter->filter.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 dvb_dmxdev_feed_restart(dmxdevfilter);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300511 dmxdevfilter->feed.sec = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 break;
513 case DMXDEV_TYPE_PES:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 dvb_dmxdev_feed_stop(dmxdevfilter);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300515 demux = dmxdevfilter->dev->demux;
516 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
517 demux->release_ts_feed(demux, feed->ts);
518 feed->ts = NULL;
519 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 break;
521 default:
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300522 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 return 0;
524 return -EINVAL;
525 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300526
527 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 return 0;
529}
530
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300531static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
532{
533 struct dmxdev_feed *feed, *tmp;
534
535 /* delete all PIDs */
536 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
537 list_del(&feed->next);
538 kfree(feed);
539 }
540
541 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
542}
543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
545{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300546 if (dmxdevfilter->state < DMXDEV_STATE_SET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 return 0;
548
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300549 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
550 dvb_dmxdev_delete_pids(dmxdevfilter);
551
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300552 dmxdevfilter->type = DMXDEV_TYPE_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
554 return 0;
555}
556
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300557static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
558 struct dmxdev_filter *filter,
559 struct dmxdev_feed *feed)
560{
561 struct timespec timeout = { 0 };
562 struct dmx_pes_filter_params *para = &filter->params.pes;
563 dmx_output_t otype;
564 int ret;
565 int ts_type;
Mauro Carvalho Chehabfde04ab2013-04-04 13:25:30 -0300566 enum dmx_ts_pes ts_pes;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300567 struct dmx_ts_feed *tsfeed;
568
569 feed->ts = NULL;
570 otype = para->output;
571
Mauro Carvalho Chehab9ae2ae32010-12-27 11:41:14 -0300572 ts_pes = para->pes_type;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300573
574 if (ts_pes < DMX_PES_OTHER)
575 ts_type = TS_DECODER;
576 else
577 ts_type = 0;
578
579 if (otype == DMX_OUT_TS_TAP)
580 ts_type |= TS_PACKET;
581 else if (otype == DMX_OUT_TSDEMUX_TAP)
582 ts_type |= TS_PACKET | TS_DEMUX;
583 else if (otype == DMX_OUT_TAP)
584 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
585
586 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
587 dvb_dmxdev_ts_callback);
588 if (ret < 0)
589 return ret;
590
591 tsfeed = feed->ts;
592 tsfeed->priv = filter;
593
594 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, 32768, timeout);
595 if (ret < 0) {
596 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
597 return ret;
598 }
599
600 ret = tsfeed->start_filtering(tsfeed);
601 if (ret < 0) {
602 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
603 return ret;
604 }
605
606 return 0;
607}
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
610{
611 struct dmxdev *dmxdev = filter->dev;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300612 struct dmxdev_feed *feed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 void *mem;
614 int ret, i;
615
616 if (filter->state < DMXDEV_STATE_SET)
617 return -EINVAL;
618
619 if (filter->state >= DMXDEV_STATE_GO)
620 dvb_dmxdev_filter_stop(filter);
621
Andreas Oberritter34731df2006-03-14 17:31:01 -0300622 if (!filter->buffer.data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 mem = vmalloc(filter->buffer.size);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300624 if (!mem)
625 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 spin_lock_irq(&filter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300627 filter->buffer.data = mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 spin_unlock_irq(&filter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 }
630
Andreas Oberritter34731df2006-03-14 17:31:01 -0300631 dvb_ringbuffer_flush(&filter->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 switch (filter->type) {
634 case DMXDEV_TYPE_SEC:
635 {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300636 struct dmx_sct_filter_params *para = &filter->params.sec;
637 struct dmx_section_filter **secfilter = &filter->filter.sec;
638 struct dmx_section_feed **secfeed = &filter->feed.sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300640 *secfilter = NULL;
641 *secfeed = NULL;
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644 /* find active filter/feed with same PID */
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300645 for (i = 0; i < dmxdev->filternum; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
Andreas Oberritter09794a62006-03-10 15:21:28 -0300647 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
648 dmxdev->filter[i].params.sec.pid == para->pid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 *secfeed = dmxdev->filter[i].feed.sec;
650 break;
651 }
652 }
653
654 /* if no feed found, try to allocate new one */
655 if (!*secfeed) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300656 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
657 secfeed,
658 dvb_dmxdev_section_callback);
659 if (ret < 0) {
660 printk("DVB (%s): could not alloc feed\n",
Harvey Harrison46b4f7c2008-04-08 23:20:00 -0300661 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return ret;
663 }
664
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300665 ret = (*secfeed)->set(*secfeed, para->pid, 32768,
666 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
667 if (ret < 0) {
668 printk("DVB (%s): could not set feed\n",
Harvey Harrison46b4f7c2008-04-08 23:20:00 -0300669 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 dvb_dmxdev_feed_restart(filter);
671 return ret;
672 }
673 } else {
674 dvb_dmxdev_feed_stop(filter);
675 }
676
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300677 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if (ret < 0) {
679 dvb_dmxdev_feed_restart(filter);
680 filter->feed.sec->start_filtering(*secfeed);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300681 dprintk("could not get filter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 return ret;
683 }
684
685 (*secfilter)->priv = filter;
686
687 memcpy(&((*secfilter)->filter_value[3]),
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300688 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 memcpy(&(*secfilter)->filter_mask[3],
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300690 &para->filter.mask[1], DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 memcpy(&(*secfilter)->filter_mode[3],
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300692 &para->filter.mode[1], DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300694 (*secfilter)->filter_value[0] = para->filter.filter[0];
695 (*secfilter)->filter_mask[0] = para->filter.mask[0];
696 (*secfilter)->filter_mode[0] = para->filter.mode[0];
697 (*secfilter)->filter_mask[1] = 0;
698 (*secfilter)->filter_mask[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700 filter->todo = 0;
701
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300702 ret = filter->feed.sec->start_filtering(filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 if (ret < 0)
704 return ret;
705
706 dvb_dmxdev_filter_timer(filter);
707 break;
708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300710 list_for_each_entry(feed, &filter->feed.ts, next) {
711 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
712 if (ret < 0) {
713 dvb_dmxdev_filter_stop(filter);
714 return ret;
715 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 default:
719 return -EINVAL;
720 }
721
722 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
723 return 0;
724}
725
726static int dvb_demux_open(struct inode *inode, struct file *file)
727{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700728 struct dvb_device *dvbdev = file->private_data;
729 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 int i;
731 struct dmxdev_filter *dmxdevfilter;
732
733 if (!dmxdev->filter)
734 return -EINVAL;
735
Ingo Molnar3593cab2006-02-07 06:49:14 -0200736 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 return -ERESTARTSYS;
738
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300739 for (i = 0; i < dmxdev->filternum; i++)
740 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 break;
742
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300743 if (i == dmxdev->filternum) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200744 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 return -EMFILE;
746 }
747
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300748 dmxdevfilter = &dmxdev->filter[i];
Ingo Molnar3593cab2006-02-07 06:49:14 -0200749 mutex_init(&dmxdevfilter->mutex);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300750 file->private_data = dmxdevfilter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Andreas Oberritter34731df2006-03-14 17:31:01 -0300752 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300753 dmxdevfilter->type = DMXDEV_TYPE_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 init_timer(&dmxdevfilter->timer);
756
Markus Rechberger57861b42007-04-14 10:19:18 -0300757 dvbdev->users++;
758
Ingo Molnar3593cab2006-02-07 06:49:14 -0200759 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return 0;
761}
762
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300763static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
764 struct dmxdev_filter *dmxdevfilter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765{
Simon Arlottc2788502007-03-10 06:21:25 -0300766 mutex_lock(&dmxdev->mutex);
767 mutex_lock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
769 dvb_dmxdev_filter_stop(dmxdevfilter);
770 dvb_dmxdev_filter_reset(dmxdevfilter);
771
772 if (dmxdevfilter->buffer.data) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300773 void *mem = dmxdevfilter->buffer.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
775 spin_lock_irq(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300776 dmxdevfilter->buffer.data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 spin_unlock_irq(&dmxdev->lock);
778 vfree(mem);
779 }
780
781 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
782 wake_up(&dmxdevfilter->buffer.queue);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200783 mutex_unlock(&dmxdevfilter->mutex);
784 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 return 0;
786}
787
788static inline void invert_mode(dmx_filter_t *filter)
789{
790 int i;
791
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300792 for (i = 0; i < DMX_FILTER_SIZE; i++)
793 filter->mode[i] ^= 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794}
795
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300796static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
797 struct dmxdev_filter *filter, u16 pid)
798{
799 struct dmxdev_feed *feed;
800
801 if ((filter->type != DMXDEV_TYPE_PES) ||
802 (filter->state < DMXDEV_STATE_SET))
803 return -EINVAL;
804
805 /* only TS packet filters may have multiple PIDs */
806 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
807 (!list_empty(&filter->feed.ts)))
808 return -EINVAL;
809
810 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
811 if (feed == NULL)
812 return -ENOMEM;
813
814 feed->pid = pid;
815 list_add(&feed->next, &filter->feed.ts);
816
817 if (filter->state >= DMXDEV_STATE_GO)
818 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
819
820 return 0;
821}
822
823static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
824 struct dmxdev_filter *filter, u16 pid)
825{
826 struct dmxdev_feed *feed, *tmp;
827
828 if ((filter->type != DMXDEV_TYPE_PES) ||
829 (filter->state < DMXDEV_STATE_SET))
830 return -EINVAL;
831
832 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
833 if ((feed->pid == pid) && (feed->ts != NULL)) {
834 feed->ts->stop_filtering(feed->ts);
835 filter->dev->demux->release_ts_feed(filter->dev->demux,
836 feed->ts);
837 list_del(&feed->next);
838 kfree(feed);
839 }
840 }
841
842 return 0;
843}
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300846 struct dmxdev_filter *dmxdevfilter,
847 struct dmx_sct_filter_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848{
Mauro Carvalho Chehab17e67d42013-03-01 15:20:25 -0300849 dprintk("function : %s, PID=0x%04x, flags=%02x, timeout=%d\n",
850 __func__, params->pid, params->flags, params->timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
852 dvb_dmxdev_filter_stop(dmxdevfilter);
853
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300854 dmxdevfilter->type = DMXDEV_TYPE_SEC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 memcpy(&dmxdevfilter->params.sec,
856 params, sizeof(struct dmx_sct_filter_params));
857 invert_mode(&dmxdevfilter->params.sec.filter);
858 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
859
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300860 if (params->flags & DMX_IMMEDIATE_START)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 return dvb_dmxdev_filter_start(dmxdevfilter);
862
863 return 0;
864}
865
866static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300867 struct dmxdev_filter *dmxdevfilter,
868 struct dmx_pes_filter_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300870 int ret;
871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 dvb_dmxdev_filter_stop(dmxdevfilter);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300873 dvb_dmxdev_filter_reset(dmxdevfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Mauro Carvalho Chehab31becf02012-10-27 15:30:47 -0300875 if ((unsigned)params->pes_type > DMX_PES_OTHER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 return -EINVAL;
877
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300878 dmxdevfilter->type = DMXDEV_TYPE_PES;
879 memcpy(&dmxdevfilter->params, params,
880 sizeof(struct dmx_pes_filter_params));
Francesco Lavra691c9ae2010-02-07 09:49:58 -0300881 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882
883 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
884
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300885 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
886 dmxdevfilter->params.pes.pid);
887 if (ret < 0)
888 return ret;
889
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300890 if (params->flags & DMX_IMMEDIATE_START)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 return dvb_dmxdev_filter_start(dmxdevfilter);
892
893 return 0;
894}
895
896static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300897 struct file *file, char __user *buf,
898 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899{
900 int result, hcount;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300901 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300903 if (dfil->todo <= 0) {
904 hcount = 3 + dfil->todo;
905 if (hcount > count)
906 hcount = count;
907 result = dvb_dmxdev_buffer_read(&dfil->buffer,
908 file->f_flags & O_NONBLOCK,
909 buf, hcount, ppos);
910 if (result < 0) {
911 dfil->todo = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 return result;
913 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300914 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 return -EFAULT;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300916 buf += result;
917 done = result;
918 count -= result;
919 dfil->todo -= result;
920 if (dfil->todo > -3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 return done;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300922 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 if (!count)
924 return done;
925 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300926 if (count > dfil->todo)
927 count = dfil->todo;
928 result = dvb_dmxdev_buffer_read(&dfil->buffer,
929 file->f_flags & O_NONBLOCK,
930 buf, count, ppos);
931 if (result < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 return result;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300933 dfil->todo -= result;
934 return (result + done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935}
936
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937static ssize_t
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300938dvb_demux_read(struct file *file, char __user *buf, size_t count,
939 loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300941 struct dmxdev_filter *dmxdevfilter = file->private_data;
942 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Ingo Molnar3593cab2006-02-07 06:49:14 -0200944 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 return -ERESTARTSYS;
946
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300947 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
948 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 else
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300950 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
951 file->f_flags & O_NONBLOCK,
952 buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
Ingo Molnar3593cab2006-02-07 06:49:14 -0200954 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 return ret;
956}
957
Arnd Bergmann16ef8de2010-04-27 00:24:00 +0200958static int dvb_demux_do_ioctl(struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 unsigned int cmd, void *parg)
960{
Peter Beutner3ec4a302005-07-07 17:57:39 -0700961 struct dmxdev_filter *dmxdevfilter = file->private_data;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300962 struct dmxdev *dmxdev = dmxdevfilter->dev;
963 unsigned long arg = (unsigned long)parg;
964 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
Ingo Molnar3593cab2006-02-07 06:49:14 -0200966 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 return -ERESTARTSYS;
968
969 switch (cmd) {
970 case DMX_START:
Ingo Molnar3593cab2006-02-07 06:49:14 -0200971 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
972 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 return -ERESTARTSYS;
974 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300975 if (dmxdevfilter->state < DMXDEV_STATE_SET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 ret = -EINVAL;
977 else
978 ret = dvb_dmxdev_filter_start(dmxdevfilter);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200979 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 break;
981
982 case DMX_STOP:
Ingo Molnar3593cab2006-02-07 06:49:14 -0200983 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
984 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 return -ERESTARTSYS;
986 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300987 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200988 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 break;
990
991 case DMX_SET_FILTER:
Ingo Molnar3593cab2006-02-07 06:49:14 -0200992 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
993 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 return -ERESTARTSYS;
995 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300996 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200997 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 break;
999
1000 case DMX_SET_PES_FILTER:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001001 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1002 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 return -ERESTARTSYS;
1004 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001005 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001006 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 break;
1008
1009 case DMX_SET_BUFFER_SIZE:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001010 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1011 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 return -ERESTARTSYS;
1013 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001014 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001015 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 break;
1017
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 case DMX_GET_PES_PIDS:
1019 if (!dmxdev->demux->get_pes_pids) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001020 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 break;
1022 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001023 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 break;
1025
Andreas Oberritterc0510052005-09-09 13:02:21 -07001026 case DMX_GET_CAPS:
1027 if (!dmxdev->demux->get_caps) {
1028 ret = -EINVAL;
1029 break;
1030 }
1031 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
1032 break;
1033
1034 case DMX_SET_SOURCE:
1035 if (!dmxdev->demux->set_source) {
1036 ret = -EINVAL;
1037 break;
1038 }
1039 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
1040 break;
1041
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 case DMX_GET_STC:
1043 if (!dmxdev->demux->get_stc) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001044 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 break;
1046 }
1047 ret = dmxdev->demux->get_stc(dmxdev->demux,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001048 ((struct dmx_stc *)parg)->num,
1049 &((struct dmx_stc *)parg)->stc,
1050 &((struct dmx_stc *)parg)->base);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 break;
1052
Andreas Oberritter1cb662a2009-07-14 20:28:50 -03001053 case DMX_ADD_PID:
1054 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1055 ret = -ERESTARTSYS;
1056 break;
1057 }
1058 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1059 mutex_unlock(&dmxdevfilter->mutex);
1060 break;
1061
1062 case DMX_REMOVE_PID:
1063 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1064 ret = -ERESTARTSYS;
1065 break;
1066 }
1067 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1068 mutex_unlock(&dmxdevfilter->mutex);
1069 break;
1070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 default:
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001072 ret = -EINVAL;
1073 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 }
Ingo Molnar3593cab2006-02-07 06:49:14 -02001075 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 return ret;
1077}
1078
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001079static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1080 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
Arnd Bergmann72024f12010-09-11 19:56:45 +02001082 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001085static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086{
Peter Beutner3ec4a302005-07-07 17:57:39 -07001087 struct dmxdev_filter *dmxdevfilter = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 unsigned int mask = 0;
1089
Mauro Carvalho Chehab313ddec2014-09-03 14:32:26 -03001090 if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
Changbing Xiong236c9bf2014-08-20 23:05:07 -03001091 return POLLERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
1093 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1094
1095 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1096 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1097 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1098 return 0;
1099
1100 if (dmxdevfilter->buffer.error)
1101 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1102
Andreas Oberritter34731df2006-03-14 17:31:01 -03001103 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1105
1106 return mask;
1107}
1108
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109static int dvb_demux_release(struct inode *inode, struct file *file)
1110{
Peter Beutner3ec4a302005-07-07 17:57:39 -07001111 struct dmxdev_filter *dmxdevfilter = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 struct dmxdev *dmxdev = dmxdevfilter->dev;
1113
Markus Rechberger57861b42007-04-14 10:19:18 -03001114 int ret;
1115
1116 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1117
1118 mutex_lock(&dmxdev->mutex);
1119 dmxdev->dvbdev->users--;
1120 if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
Markus Rechberger57861b42007-04-14 10:19:18 -03001121 mutex_unlock(&dmxdev->mutex);
1122 wake_up(&dmxdev->dvbdev->wait_queue);
1123 } else
1124 mutex_unlock(&dmxdev->mutex);
1125
1126 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127}
1128
Jan Engelhardt784e29d2009-01-11 06:12:43 -03001129static const struct file_operations dvb_demux_fops = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001130 .owner = THIS_MODULE,
1131 .read = dvb_demux_read,
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001132 .unlocked_ioctl = dvb_demux_ioctl,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001133 .open = dvb_demux_open,
1134 .release = dvb_demux_release,
1135 .poll = dvb_demux_poll,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001136 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137};
1138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139static struct dvb_device dvbdev_demux = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001140 .priv = NULL,
1141 .users = 1,
1142 .writers = 1,
1143 .fops = &dvb_demux_fops
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144};
1145
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001146static int dvb_dvr_do_ioctl(struct file *file,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001147 unsigned int cmd, void *parg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -07001149 struct dvb_device *dvbdev = file->private_data;
1150 struct dmxdev *dmxdev = dvbdev->priv;
Andrea Odettia095be42008-04-20 19:14:51 -03001151 unsigned long arg = (unsigned long)parg;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001152 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
Ingo Molnar3593cab2006-02-07 06:49:14 -02001154 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 return -ERESTARTSYS;
1156
1157 switch (cmd) {
1158 case DMX_SET_BUFFER_SIZE:
Andrea Odettia095be42008-04-20 19:14:51 -03001159 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 break;
1161
1162 default:
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001163 ret = -EINVAL;
1164 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 }
Ingo Molnar3593cab2006-02-07 06:49:14 -02001166 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 return ret;
1168}
1169
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001170static long dvb_dvr_ioctl(struct file *file,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001171 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172{
Arnd Bergmann72024f12010-09-11 19:56:45 +02001173 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174}
1175
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001176static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -07001178 struct dvb_device *dvbdev = file->private_data;
1179 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 unsigned int mask = 0;
1181
Harvey Harrison46b4f7c2008-04-08 23:20:00 -03001182 dprintk("function : %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183
Changbing Xiongd102cac2014-08-20 23:05:40 -03001184 if (dmxdev->exit)
1185 return POLLERR;
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1188
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001189 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 if (dmxdev->dvr_buffer.error)
1191 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1192
Andreas Oberritter34731df2006-03-14 17:31:01 -03001193 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1195 } else
1196 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1197
1198 return mask;
1199}
1200
Alexey Dobriyan828c0952009-10-01 15:43:56 -07001201static const struct file_operations dvb_dvr_fops = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001202 .owner = THIS_MODULE,
1203 .read = dvb_dvr_read,
1204 .write = dvb_dvr_write,
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001205 .unlocked_ioctl = dvb_dvr_ioctl,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001206 .open = dvb_dvr_open,
1207 .release = dvb_dvr_release,
1208 .poll = dvb_dvr_poll,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001209 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210};
1211
1212static struct dvb_device dvbdev_dvr = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001213 .priv = NULL,
Trent Piepho5e85bd02006-03-30 15:53:32 -03001214 .readers = 1,
Markus Rechberger57861b42007-04-14 10:19:18 -03001215 .users = 1,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001216 .fops = &dvb_dvr_fops
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217};
1218
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001219int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220{
1221 int i;
1222
1223 if (dmxdev->demux->open(dmxdev->demux) < 0)
1224 return -EUSERS;
1225
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001226 dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 if (!dmxdev->filter)
1228 return -ENOMEM;
1229
Ingo Molnar3593cab2006-02-07 06:49:14 -02001230 mutex_init(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 spin_lock_init(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001232 for (i = 0; i < dmxdev->filternum; i++) {
1233 dmxdev->filter[i].dev = dmxdev;
1234 dmxdev->filter[i].buffer.data = NULL;
1235 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1236 DMXDEV_STATE_FREE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 }
1238
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001239 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1240 DVB_DEVICE_DEMUX);
1241 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1242 dmxdev, DVB_DEVICE_DVR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
Andreas Oberritter34731df2006-03-14 17:31:01 -03001244 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245
1246 return 0;
1247}
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249EXPORT_SYMBOL(dvb_dmxdev_init);
1250
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001251void dvb_dmxdev_release(struct dmxdev *dmxdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
Markus Rechberger57861b42007-04-14 10:19:18 -03001253 dmxdev->exit=1;
1254 if (dmxdev->dvbdev->users > 1) {
1255 wait_event(dmxdev->dvbdev->wait_queue,
1256 dmxdev->dvbdev->users==1);
1257 }
1258 if (dmxdev->dvr_dvbdev->users > 1) {
1259 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1260 dmxdev->dvr_dvbdev->users==1);
1261 }
1262
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 dvb_unregister_device(dmxdev->dvbdev);
1264 dvb_unregister_device(dmxdev->dvr_dvbdev);
1265
1266 vfree(dmxdev->filter);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001267 dmxdev->filter = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 dmxdev->demux->close(dmxdev->demux);
1269}
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271EXPORT_SYMBOL(dvb_dmxdev_release);