blob: 5d5a48475a54fd6f68b3da645fbe7d274d8aaba3 [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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -030019#define pr_fmt(fmt) "dmxdev: " fmt
20
Alexey Dobriyana99bbaf2009-10-04 16:11:37 +040021#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/spinlock.h>
23#include <linux/slab.h>
24#include <linux/vmalloc.h>
25#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/poll.h>
27#include <linux/ioctl.h>
28#include <linux/wait.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080029#include <linux/uaccess.h>
Mauro Carvalho Chehabfada1932017-12-28 13:03:51 -050030#include <media/dmxdev.h>
31#include <media/dvb_vb2.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33static int debug;
34
35module_param(debug, int, 0644);
36MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
37
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -030038#define dprintk(fmt, arg...) do { \
39 if (debug) \
40 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
41 __func__, ##arg); \
42} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Andreas Oberritter34731df2006-03-14 17:31:01 -030044static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
45 const u8 *src, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
Andreas Oberritter34731df2006-03-14 17:31:01 -030047 ssize_t free;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49 if (!len)
50 return 0;
51 if (!buf->data)
52 return 0;
53
Andreas Oberritter34731df2006-03-14 17:31:01 -030054 free = dvb_ringbuffer_free(buf);
55 if (len > free) {
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -030056 dprintk("buffer overflow\n");
Andreas Oberritter34731df2006-03-14 17:31:01 -030057 return -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 }
Andreas Oberritter34731df2006-03-14 17:31:01 -030059
60 return dvb_ringbuffer_write(buf, src, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Andreas Oberritter34731df2006-03-14 17:31:01 -030063static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -030064 int non_blocking, char __user *buf,
65 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Andreas Oberritter34731df2006-03-14 17:31:01 -030067 size_t todo;
68 ssize_t avail;
69 ssize_t ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71 if (!src->data)
72 return 0;
73
Andreas Oberritter34731df2006-03-14 17:31:01 -030074 if (src->error) {
75 ret = src->error;
76 dvb_ringbuffer_flush(src);
77 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 }
79
Andreas Oberritter34731df2006-03-14 17:31:01 -030080 for (todo = count; todo > 0; todo -= ret) {
81 if (non_blocking && dvb_ringbuffer_empty(src)) {
82 ret = -EWOULDBLOCK;
83 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 }
85
Andreas Oberritter34731df2006-03-14 17:31:01 -030086 ret = wait_event_interruptible(src->queue,
87 !dvb_ringbuffer_empty(src) ||
88 (src->error != 0));
89 if (ret < 0)
90 break;
91
92 if (src->error) {
93 ret = src->error;
94 dvb_ringbuffer_flush(src);
95 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 }
Andreas Oberritter34731df2006-03-14 17:31:01 -030097
98 avail = dvb_ringbuffer_avail(src);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -030099 if (avail > todo)
100 avail = todo;
Andreas Oberritter34731df2006-03-14 17:31:01 -0300101
Al Virob0ba0e32008-06-22 14:20:29 -0300102 ret = dvb_ringbuffer_read_user(src, buf, avail);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300103 if (ret < 0)
104 break;
105
106 buf += ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300108
109 return (count - todo) ? (count - todo) : ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300112static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
114 struct list_head *head, *pos;
115
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300116 head = demux->get_frontends(demux);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 if (!head)
118 return NULL;
119 list_for_each(pos, head)
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300120 if (DMX_FE_ENTRY(pos)->source == type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 return DMX_FE_ENTRY(pos);
122
123 return NULL;
124}
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126static int dvb_dvr_open(struct inode *inode, struct file *file)
127{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700128 struct dvb_device *dvbdev = file->private_data;
129 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 struct dmx_frontend *front;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500131 bool need_ringbuffer = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300133 dprintk("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Ingo Molnar3593cab2006-02-07 06:49:14 -0200135 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 return -ERESTARTSYS;
137
Markus Rechberger57861b42007-04-14 10:19:18 -0300138 if (dmxdev->exit) {
139 mutex_unlock(&dmxdev->mutex);
140 return -ENODEV;
141 }
142
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500143 dmxdev->may_do_mmap = 0;
144
145 /*
146 * The logic here is a little tricky due to the ifdef.
147 *
148 * The ringbuffer is used for both read and mmap.
149 *
150 * It is not needed, however, on two situations:
151 * - Write devices (access with O_WRONLY);
152 * - For duplex device nodes, opened with O_RDWR.
153 */
154
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500155 if ((file->f_flags & O_ACCMODE) == O_RDONLY)
156 need_ringbuffer = true;
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500157 else if ((file->f_flags & O_ACCMODE) == O_RDWR) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300158 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500159#ifdef CONFIG_DVB_MMAP
160 dmxdev->may_do_mmap = 1;
161 need_ringbuffer = true;
162#else
Ingo Molnar3593cab2006-02-07 06:49:14 -0200163 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return -EOPNOTSUPP;
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500165#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 }
167 }
168
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500169 if (need_ringbuffer) {
Trent Piepho5e85bd02006-03-30 15:53:32 -0300170 void *mem;
devendra sharmae90bbac2016-12-18 11:52:55 -0200171
Trent Piepho5e85bd02006-03-30 15:53:32 -0300172 if (!dvbdev->readers) {
173 mutex_unlock(&dmxdev->mutex);
174 return -EBUSY;
175 }
176 mem = vmalloc(DVR_BUFFER_SIZE);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300177 if (!mem) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300178 mutex_unlock(&dmxdev->mutex);
179 return -ENOMEM;
180 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300181 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500182 if (dmxdev->may_do_mmap)
183 dvb_vb2_init(&dmxdev->dvr_vb2_ctx, "dvr",
184 file->f_flags & O_NONBLOCK);
Trent Piepho5e85bd02006-03-30 15:53:32 -0300185 dvbdev->readers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
187
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300188 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
189 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
191 if (!dmxdev->demux->write) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200192 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return -EOPNOTSUPP;
194 }
195
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300196 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 if (!front) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200199 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return -EINVAL;
201 }
202 dmxdev->demux->disconnect_frontend(dmxdev->demux);
203 dmxdev->demux->connect_frontend(dmxdev->demux, front);
204 }
Markus Rechberger57861b42007-04-14 10:19:18 -0300205 dvbdev->users++;
Ingo Molnar3593cab2006-02-07 06:49:14 -0200206 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 return 0;
208}
209
210static int dvb_dvr_release(struct inode *inode, struct file *file)
211{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700212 struct dvb_device *dvbdev = file->private_data;
213 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Simon Arlottc2788502007-03-10 06:21:25 -0300215 mutex_lock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300217 if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 dmxdev->demux->disconnect_frontend(dmxdev->demux);
219 dmxdev->demux->connect_frontend(dmxdev->demux,
220 dmxdev->dvr_orig_fe);
221 }
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500222
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500223 if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||
224 dmxdev->may_do_mmap) {
225 if (dmxdev->may_do_mmap) {
226 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
227 dvb_vb2_stream_off(&dmxdev->dvr_vb2_ctx);
228 dvb_vb2_release(&dmxdev->dvr_vb2_ctx);
229 }
Trent Piepho5e85bd02006-03-30 15:53:32 -0300230 dvbdev->readers++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 if (dmxdev->dvr_buffer.data) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300232 void *mem = dmxdev->dvr_buffer.data;
devendra sharmae90bbac2016-12-18 11:52:55 -0200233 /*memory barrier*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 mb();
235 spin_lock_irq(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300236 dmxdev->dvr_buffer.data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 spin_unlock_irq(&dmxdev->lock);
238 vfree(mem);
239 }
240 }
Markus Rechberger57861b42007-04-14 10:19:18 -0300241 /* TODO */
242 dvbdev->users--;
Jiri Slaby1c488ea2010-07-18 15:34:18 -0300243 if (dvbdev->users == 1 && dmxdev->exit == 1) {
Markus Rechberger57861b42007-04-14 10:19:18 -0300244 mutex_unlock(&dmxdev->mutex);
245 wake_up(&dvbdev->wait_queue);
246 } else
247 mutex_unlock(&dmxdev->mutex);
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 return 0;
250}
251
252static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300253 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700255 struct dvb_device *dvbdev = file->private_data;
256 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 int ret;
258
259 if (!dmxdev->demux->write)
260 return -EOPNOTSUPP;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300261 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 return -EINVAL;
Ingo Molnar3593cab2006-02-07 06:49:14 -0200263 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return -ERESTARTSYS;
Markus Rechberger57861b42007-04-14 10:19:18 -0300265
266 if (dmxdev->exit) {
267 mutex_unlock(&dmxdev->mutex);
268 return -ENODEV;
269 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300270 ret = dmxdev->demux->write(dmxdev->demux, buf, count);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200271 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return ret;
273}
274
275static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300276 loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700278 struct dvb_device *dvbdev = file->private_data;
279 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Simon Arlotteda9f752009-05-12 17:39:28 -0300281 if (dmxdev->exit)
Markus Rechberger57861b42007-04-14 10:19:18 -0300282 return -ENODEV;
Markus Rechberger57861b42007-04-14 10:19:18 -0300283
Simon Arlotteda9f752009-05-12 17:39:28 -0300284 return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
285 file->f_flags & O_NONBLOCK,
286 buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287}
288
Andrea Odettia095be42008-04-20 19:14:51 -0300289static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
290 unsigned long size)
291{
292 struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
293 void *newmem;
294 void *oldmem;
295
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300296 dprintk("%s\n", __func__);
Andrea Odettia095be42008-04-20 19:14:51 -0300297
298 if (buf->size == size)
299 return 0;
300 if (!size)
301 return -EINVAL;
302
303 newmem = vmalloc(size);
304 if (!newmem)
305 return -ENOMEM;
306
307 oldmem = buf->data;
308
309 spin_lock_irq(&dmxdev->lock);
310 buf->data = newmem;
311 buf->size = size;
312
313 /* reset and not flush in case the buffer shrinks */
314 dvb_ringbuffer_reset(buf);
315 spin_unlock_irq(&dmxdev->lock);
316
317 vfree(oldmem);
318
319 return 0;
320}
321
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300322static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
323 *dmxdevfilter, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
325 spin_lock_irq(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300326 dmxdevfilter->state = state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 spin_unlock_irq(&dmxdevfilter->dev->lock);
328}
329
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300330static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
331 unsigned long size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
Andreas Oberritter34731df2006-03-14 17:31:01 -0300333 struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
Andrea Odettia095be42008-04-20 19:14:51 -0300334 void *newmem;
335 void *oldmem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300337 if (buf->size == size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 return 0;
Andrea Odettia095be42008-04-20 19:14:51 -0300339 if (!size)
340 return -EINVAL;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300341 if (dmxdevfilter->state >= DMXDEV_STATE_GO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 return -EBUSY;
Andrea Odettia095be42008-04-20 19:14:51 -0300343
344 newmem = vmalloc(size);
345 if (!newmem)
346 return -ENOMEM;
347
348 oldmem = buf->data;
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 spin_lock_irq(&dmxdevfilter->dev->lock);
Andrea Odettia095be42008-04-20 19:14:51 -0300351 buf->data = newmem;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300352 buf->size = size;
Andrea Odetti48c01a92008-04-20 18:37:45 -0300353
354 /* reset and not flush in case the buffer shrinks */
355 dvb_ringbuffer_reset(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 spin_unlock_irq(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Andrea Odettia095be42008-04-20 19:14:51 -0300358 vfree(oldmem);
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 return 0;
361}
362
Kees Cooke7e0e2c2017-10-16 19:10:47 -0400363static void dvb_dmxdev_filter_timeout(struct timer_list *t)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
Kees Cooke7e0e2c2017-10-16 19:10:47 -0400365 struct dmxdev_filter *dmxdevfilter = from_timer(dmxdevfilter, t, timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300367 dmxdevfilter->buffer.error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 spin_lock_irq(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300369 dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 spin_unlock_irq(&dmxdevfilter->dev->lock);
371 wake_up(&dmxdevfilter->buffer.queue);
372}
373
374static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
375{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300376 struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 del_timer(&dmxdevfilter->timer);
379 if (para->timeout) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300380 dmxdevfilter->timer.expires =
381 jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 add_timer(&dmxdevfilter->timer);
383 }
384}
385
386static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300387 const u8 *buffer2, size_t buffer2_len,
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500388 struct dmx_section_filter *filter,
389 u32 *buffer_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700391 struct dmxdev_filter *dmxdevfilter = filter->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 int ret;
393
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500394 if (!dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx) &&
395 dmxdevfilter->buffer.error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 wake_up(&dmxdevfilter->buffer.queue);
397 return 0;
398 }
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300399 spin_lock(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300400 if (dmxdevfilter->state != DMXDEV_STATE_GO) {
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300401 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 return 0;
403 }
404 del_timer(&dmxdevfilter->timer);
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300405 dprintk("section callback %*ph\n", 6, buffer1);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500406 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx)) {
407 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500408 buffer1, buffer1_len,
409 buffer_flags);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500410 if (ret == buffer1_len)
411 ret = dvb_vb2_fill_buffer(&dmxdevfilter->vb2_ctx,
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500412 buffer2, buffer2_len,
413 buffer_flags);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500414 } else {
415 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
416 buffer1, buffer1_len);
417 if (ret == buffer1_len) {
418 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer,
419 buffer2, buffer2_len);
420 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 }
Soeren Moch414abbd2013-06-05 21:26:23 -0300422 if (ret < 0)
Andreas Oberritter34731df2006-03-14 17:31:01 -0300423 dmxdevfilter->buffer.error = ret;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300424 if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
425 dmxdevfilter->state = DMXDEV_STATE_DONE;
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300426 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 wake_up(&dmxdevfilter->buffer.queue);
428 return 0;
429}
430
431static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300432 const u8 *buffer2, size_t buffer2_len,
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500433 struct dmx_ts_feed *feed,
434 u32 *buffer_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700436 struct dmxdev_filter *dmxdevfilter = feed->priv;
Andreas Oberritter34731df2006-03-14 17:31:01 -0300437 struct dvb_ringbuffer *buffer;
Arnd Bergmannec5b1002018-01-04 05:31:30 -0500438#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500439 struct dvb_vb2_ctx *ctx;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500440#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 int ret;
442
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300443 spin_lock(&dmxdevfilter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300444 if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300445 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return 0;
447 }
448
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500449 if (dmxdevfilter->params.pes.output == DMX_OUT_TAP ||
450 dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300451 buffer = &dmxdevfilter->buffer;
Arnd Bergmannec5b1002018-01-04 05:31:30 -0500452#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500453 ctx = &dmxdevfilter->vb2_ctx;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500454#endif
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500455 } else {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300456 buffer = &dmxdevfilter->dev->dvr_buffer;
Arnd Bergmannec5b1002018-01-04 05:31:30 -0500457#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500458 ctx = &dmxdevfilter->dev->dvr_vb2_ctx;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -0500459#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 }
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500461
462 if (dvb_vb2_is_streaming(ctx)) {
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500463 ret = dvb_vb2_fill_buffer(ctx, buffer1, buffer1_len,
464 buffer_flags);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500465 if (ret == buffer1_len)
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -0500466 ret = dvb_vb2_fill_buffer(ctx, buffer2, buffer2_len,
467 buffer_flags);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500468 } else {
469 if (buffer->error) {
470 spin_unlock(&dmxdevfilter->dev->lock);
471 wake_up(&buffer->queue);
472 return 0;
473 }
474 ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
475 if (ret == buffer1_len)
476 ret = dvb_dmxdev_buffer_write(buffer,
477 buffer2, buffer2_len);
478 }
Soeren Moch414abbd2013-06-05 21:26:23 -0300479 if (ret < 0)
Andreas Oberritter34731df2006-03-14 17:31:01 -0300480 buffer->error = ret;
Mauro Carvalho Chehab28100162009-02-16 15:27:44 -0300481 spin_unlock(&dmxdevfilter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 wake_up(&buffer->queue);
483 return 0;
484}
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486/* stop feed but only mark the specified filter as stopped (state set) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
488{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300489 struct dmxdev_feed *feed;
490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
492
493 switch (dmxdevfilter->type) {
494 case DMXDEV_TYPE_SEC:
495 del_timer(&dmxdevfilter->timer);
496 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
497 break;
498 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300499 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
500 feed->ts->stop_filtering(feed->ts);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 break;
502 default:
503 return -EINVAL;
504 }
505 return 0;
506}
507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508/* start feed associated with the specified filter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
510{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300511 struct dmxdev_feed *feed;
512 int ret;
513
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300514 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516 switch (filter->type) {
517 case DMXDEV_TYPE_SEC:
518 return filter->feed.sec->start_filtering(filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300520 list_for_each_entry(feed, &filter->feed.ts, next) {
521 ret = feed->ts->start_filtering(feed->ts);
522 if (ret < 0) {
523 dvb_dmxdev_feed_stop(filter);
524 return ret;
525 }
526 }
527 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 default:
529 return -EINVAL;
530 }
531
532 return 0;
533}
534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535/* restart section feed if it has filters left associated with it,
536 otherwise release the feed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
538{
539 int i;
540 struct dmxdev *dmxdev = filter->dev;
541 u16 pid = filter->params.sec.pid;
542
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300543 for (i = 0; i < dmxdev->filternum; i++)
544 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
545 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
546 dmxdev->filter[i].params.sec.pid == pid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
548 return 0;
549 }
550
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300551 filter->dev->demux->release_section_feed(dmxdev->demux,
552 filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554 return 0;
555}
556
557static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
558{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300559 struct dmxdev_feed *feed;
560 struct dmx_demux *demux;
561
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300562 if (dmxdevfilter->state < DMXDEV_STATE_GO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 return 0;
564
565 switch (dmxdevfilter->type) {
566 case DMXDEV_TYPE_SEC:
567 if (!dmxdevfilter->feed.sec)
568 break;
569 dvb_dmxdev_feed_stop(dmxdevfilter);
570 if (dmxdevfilter->filter.sec)
571 dmxdevfilter->feed.sec->
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300572 release_filter(dmxdevfilter->feed.sec,
573 dmxdevfilter->filter.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 dvb_dmxdev_feed_restart(dmxdevfilter);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300575 dmxdevfilter->feed.sec = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 break;
577 case DMXDEV_TYPE_PES:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 dvb_dmxdev_feed_stop(dmxdevfilter);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300579 demux = dmxdevfilter->dev->demux;
580 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
581 demux->release_ts_feed(demux, feed->ts);
582 feed->ts = NULL;
583 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 break;
585 default:
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300586 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 return 0;
588 return -EINVAL;
589 }
Andreas Oberritter34731df2006-03-14 17:31:01 -0300590
591 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 return 0;
593}
594
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300595static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
596{
597 struct dmxdev_feed *feed, *tmp;
598
599 /* delete all PIDs */
600 list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
601 list_del(&feed->next);
602 kfree(feed);
603 }
604
605 BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
606}
607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
609{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300610 if (dmxdevfilter->state < DMXDEV_STATE_SET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 return 0;
612
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300613 if (dmxdevfilter->type == DMXDEV_TYPE_PES)
614 dvb_dmxdev_delete_pids(dmxdevfilter);
615
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300616 dmxdevfilter->type = DMXDEV_TYPE_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
618 return 0;
619}
620
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300621static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
622 struct dmxdev_filter *filter,
623 struct dmxdev_feed *feed)
624{
Jasmin Jessichdde67d52018-04-28 03:45:51 -0400625 ktime_t timeout = ktime_set(0, 0);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300626 struct dmx_pes_filter_params *para = &filter->params.pes;
Mauro Carvalho Chehab3256b362017-09-01 06:09:14 -0400627 enum dmx_output otype;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300628 int ret;
629 int ts_type;
Mauro Carvalho Chehabfde04ab2013-04-04 13:25:30 -0300630 enum dmx_ts_pes ts_pes;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300631 struct dmx_ts_feed *tsfeed;
632
633 feed->ts = NULL;
634 otype = para->output;
635
Mauro Carvalho Chehab9ae2ae32010-12-27 11:41:14 -0300636 ts_pes = para->pes_type;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300637
638 if (ts_pes < DMX_PES_OTHER)
639 ts_type = TS_DECODER;
640 else
641 ts_type = 0;
642
643 if (otype == DMX_OUT_TS_TAP)
644 ts_type |= TS_PACKET;
645 else if (otype == DMX_OUT_TSDEMUX_TAP)
646 ts_type |= TS_PACKET | TS_DEMUX;
647 else if (otype == DMX_OUT_TAP)
648 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
649
650 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
651 dvb_dmxdev_ts_callback);
652 if (ret < 0)
653 return ret;
654
655 tsfeed = feed->ts;
656 tsfeed->priv = filter;
657
Mauro Carvalho Chehabdd79d27e2016-10-13 07:14:38 -0300658 ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300659 if (ret < 0) {
660 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
661 return ret;
662 }
663
664 ret = tsfeed->start_filtering(tsfeed);
665 if (ret < 0) {
666 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
667 return ret;
668 }
669
670 return 0;
671}
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
674{
675 struct dmxdev *dmxdev = filter->dev;
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300676 struct dmxdev_feed *feed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 void *mem;
678 int ret, i;
679
680 if (filter->state < DMXDEV_STATE_SET)
681 return -EINVAL;
682
683 if (filter->state >= DMXDEV_STATE_GO)
684 dvb_dmxdev_filter_stop(filter);
685
Andreas Oberritter34731df2006-03-14 17:31:01 -0300686 if (!filter->buffer.data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 mem = vmalloc(filter->buffer.size);
Andreas Oberritter34731df2006-03-14 17:31:01 -0300688 if (!mem)
689 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 spin_lock_irq(&filter->dev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300691 filter->buffer.data = mem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 spin_unlock_irq(&filter->dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
694
Andreas Oberritter34731df2006-03-14 17:31:01 -0300695 dvb_ringbuffer_flush(&filter->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 switch (filter->type) {
698 case DMXDEV_TYPE_SEC:
699 {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300700 struct dmx_sct_filter_params *para = &filter->params.sec;
701 struct dmx_section_filter **secfilter = &filter->filter.sec;
702 struct dmx_section_feed **secfeed = &filter->feed.sec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300704 *secfilter = NULL;
705 *secfeed = NULL;
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
708 /* find active filter/feed with same PID */
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300709 for (i = 0; i < dmxdev->filternum; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
Andreas Oberritter09794a62006-03-10 15:21:28 -0300711 dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
712 dmxdev->filter[i].params.sec.pid == para->pid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 *secfeed = dmxdev->filter[i].feed.sec;
714 break;
715 }
716 }
717
718 /* if no feed found, try to allocate new one */
719 if (!*secfeed) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300720 ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
721 secfeed,
722 dvb_dmxdev_section_callback);
Mauro Carvalho Chehab3d42c932021-06-09 14:43:16 +0200723 if (!*secfeed) {
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300724 pr_err("DVB (%s): could not alloc feed\n",
Harvey Harrison46b4f7c2008-04-08 23:20:00 -0300725 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return ret;
727 }
728
Mauro Carvalho Chehabdd79d27e2016-10-13 07:14:38 -0300729 ret = (*secfeed)->set(*secfeed, para->pid,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300730 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
731 if (ret < 0) {
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300732 pr_err("DVB (%s): could not set feed\n",
Harvey Harrison46b4f7c2008-04-08 23:20:00 -0300733 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 dvb_dmxdev_feed_restart(filter);
735 return ret;
736 }
737 } else {
738 dvb_dmxdev_feed_stop(filter);
739 }
740
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300741 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 if (ret < 0) {
743 dvb_dmxdev_feed_restart(filter);
744 filter->feed.sec->start_filtering(*secfeed);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300745 dprintk("could not get filter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 return ret;
747 }
748
749 (*secfilter)->priv = filter;
750
751 memcpy(&((*secfilter)->filter_value[3]),
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300752 &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 memcpy(&(*secfilter)->filter_mask[3],
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300754 &para->filter.mask[1], DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 memcpy(&(*secfilter)->filter_mode[3],
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300756 &para->filter.mode[1], DMX_FILTER_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300758 (*secfilter)->filter_value[0] = para->filter.filter[0];
759 (*secfilter)->filter_mask[0] = para->filter.mask[0];
760 (*secfilter)->filter_mode[0] = para->filter.mode[0];
761 (*secfilter)->filter_mask[1] = 0;
762 (*secfilter)->filter_mask[2] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764 filter->todo = 0;
765
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300766 ret = filter->feed.sec->start_filtering(filter->feed.sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 if (ret < 0)
768 return ret;
769
770 dvb_dmxdev_filter_timer(filter);
771 break;
772 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 case DMXDEV_TYPE_PES:
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300774 list_for_each_entry(feed, &filter->feed.ts, next) {
775 ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
776 if (ret < 0) {
777 dvb_dmxdev_filter_stop(filter);
778 return ret;
779 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 default:
783 return -EINVAL;
784 }
785
786 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
787 return 0;
788}
789
790static int dvb_demux_open(struct inode *inode, struct file *file)
791{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -0700792 struct dvb_device *dvbdev = file->private_data;
793 struct dmxdev *dmxdev = dvbdev->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 int i;
795 struct dmxdev_filter *dmxdevfilter;
796
797 if (!dmxdev->filter)
798 return -EINVAL;
799
Ingo Molnar3593cab2006-02-07 06:49:14 -0200800 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return -ERESTARTSYS;
802
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300803 for (i = 0; i < dmxdev->filternum; i++)
804 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 break;
806
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300807 if (i == dmxdev->filternum) {
Ingo Molnar3593cab2006-02-07 06:49:14 -0200808 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 return -EMFILE;
810 }
811
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300812 dmxdevfilter = &dmxdev->filter[i];
Ingo Molnar3593cab2006-02-07 06:49:14 -0200813 mutex_init(&dmxdevfilter->mutex);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300814 file->private_data = dmxdevfilter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -0500816#ifdef CONFIG_DVB_MMAP
817 dmxdev->may_do_mmap = 1;
818#else
819 dmxdev->may_do_mmap = 0;
820#endif
821
Andreas Oberritter34731df2006-03-14 17:31:01 -0300822 dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500823 dvb_vb2_init(&dmxdevfilter->vb2_ctx, "demux_filter",
824 file->f_flags & O_NONBLOCK);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300825 dmxdevfilter->type = DMXDEV_TYPE_NONE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
Kees Cooke7e0e2c2017-10-16 19:10:47 -0400827 timer_setup(&dmxdevfilter->timer, dvb_dmxdev_filter_timeout, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Markus Rechberger57861b42007-04-14 10:19:18 -0300829 dvbdev->users++;
830
Ingo Molnar3593cab2006-02-07 06:49:14 -0200831 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 return 0;
833}
834
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300835static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
836 struct dmxdev_filter *dmxdevfilter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837{
Simon Arlottc2788502007-03-10 06:21:25 -0300838 mutex_lock(&dmxdev->mutex);
839 mutex_lock(&dmxdevfilter->mutex);
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -0500840 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
841 dvb_vb2_stream_off(&dmxdevfilter->vb2_ctx);
842 dvb_vb2_release(&dmxdevfilter->vb2_ctx);
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
845 dvb_dmxdev_filter_stop(dmxdevfilter);
846 dvb_dmxdev_filter_reset(dmxdevfilter);
847
848 if (dmxdevfilter->buffer.data) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300849 void *mem = dmxdevfilter->buffer.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851 spin_lock_irq(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300852 dmxdevfilter->buffer.data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 spin_unlock_irq(&dmxdev->lock);
854 vfree(mem);
855 }
856
857 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
858 wake_up(&dmxdevfilter->buffer.queue);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200859 mutex_unlock(&dmxdevfilter->mutex);
860 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 return 0;
862}
863
Mauro Carvalho Chehab3256b362017-09-01 06:09:14 -0400864static inline void invert_mode(struct dmx_filter *filter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865{
866 int i;
867
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300868 for (i = 0; i < DMX_FILTER_SIZE; i++)
869 filter->mode[i] ^= 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870}
871
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300872static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
873 struct dmxdev_filter *filter, u16 pid)
874{
875 struct dmxdev_feed *feed;
876
877 if ((filter->type != DMXDEV_TYPE_PES) ||
878 (filter->state < DMXDEV_STATE_SET))
879 return -EINVAL;
880
881 /* only TS packet filters may have multiple PIDs */
882 if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
883 (!list_empty(&filter->feed.ts)))
884 return -EINVAL;
885
886 feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
887 if (feed == NULL)
888 return -ENOMEM;
889
890 feed->pid = pid;
891 list_add(&feed->next, &filter->feed.ts);
892
893 if (filter->state >= DMXDEV_STATE_GO)
894 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
895
896 return 0;
897}
898
899static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
900 struct dmxdev_filter *filter, u16 pid)
901{
902 struct dmxdev_feed *feed, *tmp;
903
904 if ((filter->type != DMXDEV_TYPE_PES) ||
905 (filter->state < DMXDEV_STATE_SET))
906 return -EINVAL;
907
908 list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
909 if ((feed->pid == pid) && (feed->ts != NULL)) {
910 feed->ts->stop_filtering(feed->ts);
911 filter->dev->demux->release_ts_feed(filter->dev->demux,
912 feed->ts);
913 list_del(&feed->next);
914 kfree(feed);
915 }
916 }
917
918 return 0;
919}
920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300922 struct dmxdev_filter *dmxdevfilter,
923 struct dmx_sct_filter_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924{
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -0300925 dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
Mauro Carvalho Chehab17e67d42013-03-01 15:20:25 -0300926 __func__, params->pid, params->flags, params->timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 dvb_dmxdev_filter_stop(dmxdevfilter);
929
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300930 dmxdevfilter->type = DMXDEV_TYPE_SEC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 memcpy(&dmxdevfilter->params.sec,
932 params, sizeof(struct dmx_sct_filter_params));
933 invert_mode(&dmxdevfilter->params.sec.filter);
934 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
935
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300936 if (params->flags & DMX_IMMEDIATE_START)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 return dvb_dmxdev_filter_start(dmxdevfilter);
938
939 return 0;
940}
941
942static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300943 struct dmxdev_filter *dmxdevfilter,
944 struct dmx_pes_filter_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945{
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300946 int ret;
947
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 dvb_dmxdev_filter_stop(dmxdevfilter);
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300949 dvb_dmxdev_filter_reset(dmxdevfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
devendra sharmae90bbac2016-12-18 11:52:55 -0200951 if ((unsigned int)params->pes_type > DMX_PES_OTHER)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 return -EINVAL;
953
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300954 dmxdevfilter->type = DMXDEV_TYPE_PES;
955 memcpy(&dmxdevfilter->params, params,
956 sizeof(struct dmx_pes_filter_params));
Francesco Lavra691c9ae2010-02-07 09:49:58 -0300957 INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
959 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
960
Andreas Oberritter1cb662a2009-07-14 20:28:50 -0300961 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
962 dmxdevfilter->params.pes.pid);
963 if (ret < 0)
964 return ret;
965
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300966 if (params->flags & DMX_IMMEDIATE_START)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 return dvb_dmxdev_filter_start(dmxdevfilter);
968
969 return 0;
970}
971
972static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300973 struct file *file, char __user *buf,
974 size_t count, loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975{
976 int result, hcount;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300977 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300979 if (dfil->todo <= 0) {
980 hcount = 3 + dfil->todo;
981 if (hcount > count)
982 hcount = count;
983 result = dvb_dmxdev_buffer_read(&dfil->buffer,
984 file->f_flags & O_NONBLOCK,
985 buf, hcount, ppos);
986 if (result < 0) {
987 dfil->todo = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 return result;
989 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300990 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 return -EFAULT;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300992 buf += result;
993 done = result;
994 count -= result;
995 dfil->todo -= result;
996 if (dfil->todo > -3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 return done;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -0300998 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 if (!count)
1000 return done;
1001 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001002 if (count > dfil->todo)
1003 count = dfil->todo;
1004 result = dvb_dmxdev_buffer_read(&dfil->buffer,
1005 file->f_flags & O_NONBLOCK,
1006 buf, count, ppos);
1007 if (result < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 return result;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001009 dfil->todo -= result;
1010 return (result + done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011}
1012
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013static ssize_t
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001014dvb_demux_read(struct file *file, char __user *buf, size_t count,
1015 loff_t *ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016{
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001017 struct dmxdev_filter *dmxdevfilter = file->private_data;
1018 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Ingo Molnar3593cab2006-02-07 06:49:14 -02001020 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 return -ERESTARTSYS;
1022
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001023 if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
1024 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 else
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001026 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
1027 file->f_flags & O_NONBLOCK,
1028 buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Ingo Molnar3593cab2006-02-07 06:49:14 -02001030 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 return ret;
1032}
1033
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001034static int dvb_demux_do_ioctl(struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 unsigned int cmd, void *parg)
1036{
Peter Beutner3ec4a302005-07-07 17:57:39 -07001037 struct dmxdev_filter *dmxdevfilter = file->private_data;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001038 struct dmxdev *dmxdev = dmxdevfilter->dev;
1039 unsigned long arg = (unsigned long)parg;
1040 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Ingo Molnar3593cab2006-02-07 06:49:14 -02001042 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 return -ERESTARTSYS;
1044
1045 switch (cmd) {
1046 case DMX_START:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001047 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1048 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 return -ERESTARTSYS;
1050 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001051 if (dmxdevfilter->state < DMXDEV_STATE_SET)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 ret = -EINVAL;
1053 else
1054 ret = dvb_dmxdev_filter_start(dmxdevfilter);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001055 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 break;
1057
1058 case DMX_STOP:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001059 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1060 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 return -ERESTARTSYS;
1062 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001063 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001064 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 break;
1066
1067 case DMX_SET_FILTER:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001068 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1069 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 return -ERESTARTSYS;
1071 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001072 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001073 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 break;
1075
1076 case DMX_SET_PES_FILTER:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001077 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1078 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 return -ERESTARTSYS;
1080 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001081 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001082 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 break;
1084
1085 case DMX_SET_BUFFER_SIZE:
Ingo Molnar3593cab2006-02-07 06:49:14 -02001086 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1087 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 return -ERESTARTSYS;
1089 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001090 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
Ingo Molnar3593cab2006-02-07 06:49:14 -02001091 mutex_unlock(&dmxdevfilter->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 break;
1093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 case DMX_GET_PES_PIDS:
1095 if (!dmxdev->demux->get_pes_pids) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001096 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 break;
1098 }
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001099 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 break;
1101
1102 case DMX_GET_STC:
1103 if (!dmxdev->demux->get_stc) {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001104 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 break;
1106 }
1107 ret = dmxdev->demux->get_stc(dmxdev->demux,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001108 ((struct dmx_stc *)parg)->num,
1109 &((struct dmx_stc *)parg)->stc,
1110 &((struct dmx_stc *)parg)->base);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 break;
1112
Andreas Oberritter1cb662a2009-07-14 20:28:50 -03001113 case DMX_ADD_PID:
1114 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1115 ret = -ERESTARTSYS;
1116 break;
1117 }
1118 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1119 mutex_unlock(&dmxdevfilter->mutex);
1120 break;
1121
1122 case DMX_REMOVE_PID:
1123 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1124 ret = -ERESTARTSYS;
1125 break;
1126 }
1127 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1128 mutex_unlock(&dmxdevfilter->mutex);
1129 break;
1130
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001131#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001132 case DMX_REQBUFS:
1133 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1134 mutex_unlock(&dmxdev->mutex);
1135 return -ERESTARTSYS;
1136 }
1137 ret = dvb_vb2_reqbufs(&dmxdevfilter->vb2_ctx, parg);
1138 mutex_unlock(&dmxdevfilter->mutex);
1139 break;
1140
1141 case DMX_QUERYBUF:
1142 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1143 mutex_unlock(&dmxdev->mutex);
1144 return -ERESTARTSYS;
1145 }
1146 ret = dvb_vb2_querybuf(&dmxdevfilter->vb2_ctx, parg);
1147 mutex_unlock(&dmxdevfilter->mutex);
1148 break;
1149
1150 case DMX_EXPBUF:
1151 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1152 mutex_unlock(&dmxdev->mutex);
1153 return -ERESTARTSYS;
1154 }
1155 ret = dvb_vb2_expbuf(&dmxdevfilter->vb2_ctx, parg);
1156 mutex_unlock(&dmxdevfilter->mutex);
1157 break;
1158
1159 case DMX_QBUF:
1160 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1161 mutex_unlock(&dmxdev->mutex);
1162 return -ERESTARTSYS;
1163 }
1164 ret = dvb_vb2_qbuf(&dmxdevfilter->vb2_ctx, parg);
1165 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1166 ret = dvb_vb2_stream_on(&dmxdevfilter->vb2_ctx);
1167 mutex_unlock(&dmxdevfilter->mutex);
1168 break;
1169
1170 case DMX_DQBUF:
1171 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1172 mutex_unlock(&dmxdev->mutex);
1173 return -ERESTARTSYS;
1174 }
1175 ret = dvb_vb2_dqbuf(&dmxdevfilter->vb2_ctx, parg);
1176 mutex_unlock(&dmxdevfilter->mutex);
1177 break;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001178#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 default:
Mauro Carvalho Chehaba145f642018-02-11 05:44:21 -05001180 ret = -ENOTTY;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001181 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 }
Ingo Molnar3593cab2006-02-07 06:49:14 -02001183 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 return ret;
1185}
1186
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001187static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1188 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189{
Arnd Bergmann72024f12010-09-11 19:56:45 +02001190 return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191}
1192
Al Viroc23e0cb2017-07-03 03:02:56 -04001193static __poll_t dvb_demux_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194{
Peter Beutner3ec4a302005-07-07 17:57:39 -07001195 struct dmxdev_filter *dmxdevfilter = file->private_data;
Al Viroc23e0cb2017-07-03 03:02:56 -04001196 __poll_t mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
Hans Verkuilc6f5c7c2019-02-07 06:49:48 -05001198 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1199
Mauro Carvalho Chehab313ddec2014-09-03 14:32:26 -03001200 if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001201 return EPOLLERR;
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001202 if (dvb_vb2_is_streaming(&dmxdevfilter->vb2_ctx))
1203 return dvb_vb2_poll(&dmxdevfilter->vb2_ctx, file, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1206 dmxdevfilter->state != DMXDEV_STATE_DONE &&
1207 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1208 return 0;
1209
1210 if (dmxdevfilter->buffer.error)
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001211 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Andreas Oberritter34731df2006-03-14 17:31:01 -03001213 if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001214 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
1216 return mask;
1217}
1218
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001219#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001220static int dvb_demux_mmap(struct file *file, struct vm_area_struct *vma)
1221{
1222 struct dmxdev_filter *dmxdevfilter = file->private_data;
1223 struct dmxdev *dmxdev = dmxdevfilter->dev;
1224 int ret;
1225
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -05001226 if (!dmxdev->may_do_mmap)
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -05001227 return -ENOTTY;
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -05001228
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001229 if (mutex_lock_interruptible(&dmxdev->mutex))
1230 return -ERESTARTSYS;
1231
1232 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1233 mutex_unlock(&dmxdev->mutex);
1234 return -ERESTARTSYS;
1235 }
1236 ret = dvb_vb2_mmap(&dmxdevfilter->vb2_ctx, vma);
1237
1238 mutex_unlock(&dmxdevfilter->mutex);
1239 mutex_unlock(&dmxdev->mutex);
1240
1241 return ret;
1242}
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001243#endif
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001244
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245static int dvb_demux_release(struct inode *inode, struct file *file)
1246{
Peter Beutner3ec4a302005-07-07 17:57:39 -07001247 struct dmxdev_filter *dmxdevfilter = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 struct dmxdev *dmxdev = dmxdevfilter->dev;
Markus Rechberger57861b42007-04-14 10:19:18 -03001249 int ret;
1250
1251 ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1252
1253 mutex_lock(&dmxdev->mutex);
1254 dmxdev->dvbdev->users--;
devendra sharmae90bbac2016-12-18 11:52:55 -02001255 if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
Markus Rechberger57861b42007-04-14 10:19:18 -03001256 mutex_unlock(&dmxdev->mutex);
1257 wake_up(&dmxdev->dvbdev->wait_queue);
1258 } else
1259 mutex_unlock(&dmxdev->mutex);
1260
1261 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262}
1263
Jan Engelhardt784e29d2009-01-11 06:12:43 -03001264static const struct file_operations dvb_demux_fops = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001265 .owner = THIS_MODULE,
1266 .read = dvb_demux_read,
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001267 .unlocked_ioctl = dvb_demux_ioctl,
Arnd Bergmannb5d32062018-08-27 15:56:22 -04001268 .compat_ioctl = dvb_demux_ioctl,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001269 .open = dvb_demux_open,
1270 .release = dvb_demux_release,
1271 .poll = dvb_demux_poll,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001272 .llseek = default_llseek,
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001273#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001274 .mmap = dvb_demux_mmap,
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001275#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276};
1277
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001278static const struct dvb_device dvbdev_demux = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001279 .priv = NULL,
1280 .users = 1,
1281 .writers = 1,
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001282#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
Mauro Carvalho Chehabe4fd3bc2015-02-18 12:09:27 -03001283 .name = "dvb-demux",
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001284#endif
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001285 .fops = &dvb_demux_fops
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286};
1287
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001288static int dvb_dvr_do_ioctl(struct file *file,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001289 unsigned int cmd, void *parg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -07001291 struct dvb_device *dvbdev = file->private_data;
1292 struct dmxdev *dmxdev = dvbdev->priv;
Andrea Odettia095be42008-04-20 19:14:51 -03001293 unsigned long arg = (unsigned long)parg;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001294 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
Ingo Molnar3593cab2006-02-07 06:49:14 -02001296 if (mutex_lock_interruptible(&dmxdev->mutex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 return -ERESTARTSYS;
1298
1299 switch (cmd) {
1300 case DMX_SET_BUFFER_SIZE:
Andrea Odettia095be42008-04-20 19:14:51 -03001301 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 break;
1303
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001304#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001305 case DMX_REQBUFS:
1306 ret = dvb_vb2_reqbufs(&dmxdev->dvr_vb2_ctx, parg);
1307 break;
1308
1309 case DMX_QUERYBUF:
1310 ret = dvb_vb2_querybuf(&dmxdev->dvr_vb2_ctx, parg);
1311 break;
1312
1313 case DMX_EXPBUF:
1314 ret = dvb_vb2_expbuf(&dmxdev->dvr_vb2_ctx, parg);
1315 break;
1316
1317 case DMX_QBUF:
1318 ret = dvb_vb2_qbuf(&dmxdev->dvr_vb2_ctx, parg);
1319 if (ret == 0 && !dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1320 ret = dvb_vb2_stream_on(&dmxdev->dvr_vb2_ctx);
1321 break;
1322
1323 case DMX_DQBUF:
1324 ret = dvb_vb2_dqbuf(&dmxdev->dvr_vb2_ctx, parg);
1325 break;
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001326#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 default:
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -05001328 ret = -ENOTTY;
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001329 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 }
Ingo Molnar3593cab2006-02-07 06:49:14 -02001331 mutex_unlock(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 return ret;
1333}
1334
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001335static long dvb_dvr_ioctl(struct file *file,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001336 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337{
Arnd Bergmann72024f12010-09-11 19:56:45 +02001338 return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339}
1340
Al Viroc23e0cb2017-07-03 03:02:56 -04001341static __poll_t dvb_dvr_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342{
Johannes Stezenbach0c53c702005-05-16 21:54:24 -07001343 struct dvb_device *dvbdev = file->private_data;
1344 struct dmxdev *dmxdev = dvbdev->priv;
Al Viroc23e0cb2017-07-03 03:02:56 -04001345 __poll_t mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Mauro Carvalho Chehabb3ad24d2016-10-13 06:47:54 -03001347 dprintk("%s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Hans Verkuilc6f5c7c2019-02-07 06:49:48 -05001349 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1350
Changbing Xiongd102cac2014-08-20 23:05:40 -03001351 if (dmxdev->exit)
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001352 return EPOLLERR;
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001353 if (dvb_vb2_is_streaming(&dmxdev->dvr_vb2_ctx))
1354 return dvb_vb2_poll(&dmxdev->dvr_vb2_ctx, file, wait);
Changbing Xiongd102cac2014-08-20 23:05:40 -03001355
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -05001356 if (((file->f_flags & O_ACCMODE) == O_RDONLY) ||
1357 dmxdev->may_do_mmap) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 if (dmxdev->dvr_buffer.error)
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001359 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI | EPOLLERR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Andreas Oberritter34731df2006-03-14 17:31:01 -03001361 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001362 mask |= (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 } else
Linus Torvaldsa9a08842018-02-11 14:34:03 -08001364 mask |= (EPOLLOUT | EPOLLWRNORM | EPOLLPRI);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
1366 return mask;
1367}
1368
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001369#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001370static int dvb_dvr_mmap(struct file *file, struct vm_area_struct *vma)
1371{
1372 struct dvb_device *dvbdev = file->private_data;
1373 struct dmxdev *dmxdev = dvbdev->priv;
1374 int ret;
1375
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -05001376 if (!dmxdev->may_do_mmap)
Mauro Carvalho Chehabfdbeb962018-02-09 07:30:46 -05001377 return -ENOTTY;
Mauro Carvalho Chehab0b234982018-02-09 10:44:49 -05001378
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001379 if (dmxdev->exit)
1380 return -ENODEV;
1381
1382 if (mutex_lock_interruptible(&dmxdev->mutex))
1383 return -ERESTARTSYS;
1384
1385 ret = dvb_vb2_mmap(&dmxdev->dvr_vb2_ctx, vma);
1386 mutex_unlock(&dmxdev->mutex);
1387 return ret;
1388}
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001389#endif
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001390
Alexey Dobriyan828c0952009-10-01 15:43:56 -07001391static const struct file_operations dvb_dvr_fops = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001392 .owner = THIS_MODULE,
1393 .read = dvb_dvr_read,
1394 .write = dvb_dvr_write,
Arnd Bergmann16ef8de2010-04-27 00:24:00 +02001395 .unlocked_ioctl = dvb_dvr_ioctl,
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001396 .open = dvb_dvr_open,
1397 .release = dvb_dvr_release,
1398 .poll = dvb_dvr_poll,
Arnd Bergmann6038f372010-08-15 18:52:59 +02001399 .llseek = default_llseek,
Arnd Bergmannec5b1002018-01-04 05:31:30 -05001400#ifdef CONFIG_DVB_MMAP
Satendra Singh Thakur57868acc2017-12-18 22:35:53 -05001401 .mmap = dvb_dvr_mmap,
Mauro Carvalho Chehab40210532017-12-28 09:24:20 -05001402#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403};
1404
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001405static const struct dvb_device dvbdev_dvr = {
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001406 .priv = NULL,
Trent Piepho5e85bd02006-03-30 15:53:32 -03001407 .readers = 1,
Markus Rechberger57861b42007-04-14 10:19:18 -03001408 .users = 1,
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001409#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
Mauro Carvalho Chehabe4fd3bc2015-02-18 12:09:27 -03001410 .name = "dvb-dvr",
Mauro Carvalho Chehab8afd52e2015-01-02 22:28:53 -03001411#endif
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001412 .fops = &dvb_dvr_fops
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413};
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001414int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415{
1416 int i;
1417
1418 if (dmxdev->demux->open(dmxdev->demux) < 0)
1419 return -EUSERS;
1420
Kees Cook42bc47b2018-06-12 14:27:11 -07001421 dmxdev->filter = vmalloc(array_size(sizeof(struct dmxdev_filter),
1422 dmxdev->filternum));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 if (!dmxdev->filter)
1424 return -ENOMEM;
1425
Ingo Molnar3593cab2006-02-07 06:49:14 -02001426 mutex_init(&dmxdev->mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 spin_lock_init(&dmxdev->lock);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001428 for (i = 0; i < dmxdev->filternum; i++) {
1429 dmxdev->filter[i].dev = dmxdev;
1430 dmxdev->filter[i].buffer.data = NULL;
1431 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1432 DMXDEV_STATE_FREE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 }
1434
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001435 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
Mauro Carvalho Chehabdf2f94e2015-08-21 16:18:18 -03001436 DVB_DEVICE_DEMUX, dmxdev->filternum);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001437 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
Mauro Carvalho Chehabdf2f94e2015-08-21 16:18:18 -03001438 dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439
Andreas Oberritter34731df2006-03-14 17:31:01 -03001440 dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
1442 return 0;
1443}
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001444
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445EXPORT_SYMBOL(dvb_dmxdev_init);
1446
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001447void dvb_dmxdev_release(struct dmxdev *dmxdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448{
devendra sharmae90bbac2016-12-18 11:52:55 -02001449 dmxdev->exit = 1;
Markus Rechberger57861b42007-04-14 10:19:18 -03001450 if (dmxdev->dvbdev->users > 1) {
1451 wait_event(dmxdev->dvbdev->wait_queue,
devendra sharmae90bbac2016-12-18 11:52:55 -02001452 dmxdev->dvbdev->users == 1);
Markus Rechberger57861b42007-04-14 10:19:18 -03001453 }
1454 if (dmxdev->dvr_dvbdev->users > 1) {
1455 wait_event(dmxdev->dvr_dvbdev->wait_queue,
devendra sharmae90bbac2016-12-18 11:52:55 -02001456 dmxdev->dvr_dvbdev->users == 1);
Markus Rechberger57861b42007-04-14 10:19:18 -03001457 }
1458
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 dvb_unregister_device(dmxdev->dvbdev);
1460 dvb_unregister_device(dmxdev->dvr_dvbdev);
1461
1462 vfree(dmxdev->filter);
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001463 dmxdev->filter = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 dmxdev->demux->close(dmxdev->demux);
1465}
Andreas Oberritterf705e6e2006-03-10 15:22:31 -03001466
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467EXPORT_SYMBOL(dvb_dmxdev_release);