]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - sound/core/rawmidi.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[ALSA] dynamic minors (2/6): simplify storage of snd_minor structures
[mirror_ubuntu-zesty-kernel.git] / sound / core / rawmidi.c
CommitLineData
1da177e4
LT		 1/*
2 * Abstract layer for MIDI v1.0 stream
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <sound/driver.h>
23#include <sound/core.h>
24#include <linux/major.h>
25#include <linux/init.h>
26#include <linux/smp_lock.h>
27#include <linux/sched.h>
28#include <linux/slab.h>
29#include <linux/time.h>
30#include <linux/wait.h>
31#include <linux/moduleparam.h>
32#include <linux/delay.h>
33#include <linux/wait.h>
34#include <sound/rawmidi.h>
35#include <sound/info.h>
36#include <sound/control.h>
37#include <sound/minors.h>
38#include <sound/initval.h>
39
40MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
41MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
42MODULE_LICENSE("GPL");
43
44#ifdef CONFIG_SND_OSSEMUL
45static int midi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
46static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
47module_param_array(midi_map, int, NULL, 0444);
48MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
49module_param_array(amidi_map, int, NULL, 0444);
50MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
51#endif /* CONFIG_SND_OSSEMUL */
52
48c9d417
TI		 53static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
54static int snd_rawmidi_dev_free(struct snd_device *device);
55static int snd_rawmidi_dev_register(struct snd_device *device);
56static int snd_rawmidi_dev_disconnect(struct snd_device *device);
57static int snd_rawmidi_dev_unregister(struct snd_device *device);
1da177e4 58
48c9d417 59static struct snd_rawmidi *snd_rawmidi_devices[SNDRV_CARDS * SNDRV_RAWMIDI_DEVICES];
1da177e4
LT		 60
61static DECLARE_MUTEX(register_mutex);
62
63static inline unsigned short snd_rawmidi_file_flags(struct file *file)
64{
65 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
66 case FMODE_WRITE:
67 return SNDRV_RAWMIDI_LFLG_OUTPUT;
68 case FMODE_READ:
69 return SNDRV_RAWMIDI_LFLG_INPUT;
70 default:
71 return SNDRV_RAWMIDI_LFLG_OPEN;
72 }
73}
74
48c9d417 75static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
1da177e4 76{
48c9d417 77 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 78 return runtime->avail >= runtime->avail_min;
79}
80
48c9d417
TI		 81static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
82 size_t count)
1da177e4 83{
48c9d417 84 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 85 return runtime->avail >= runtime->avail_min &&
86 (!substream->append || runtime->avail >= count);
87}
88
89static void snd_rawmidi_input_event_tasklet(unsigned long data)
90{
48c9d417 91 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
1da177e4
LT		 92 substream->runtime->event(substream);
93}
94
95static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
96{
48c9d417 97 struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
1da177e4
LT		 98 substream->ops->trigger(substream, 1);
99}
100
48c9d417 101static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
1da177e4 102{
48c9d417 103 struct snd_rawmidi_runtime *runtime;
1da177e4 104
ca2c0966 105 if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
1da177e4
LT		 106 return -ENOMEM;
107 spin_lock_init(&runtime->lock);
108 init_waitqueue_head(&runtime->sleep);
109 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
110 tasklet_init(&runtime->tasklet,
111 snd_rawmidi_input_event_tasklet,
112 (unsigned long)substream);
113 else
114 tasklet_init(&runtime->tasklet,
115 snd_rawmidi_output_trigger_tasklet,
116 (unsigned long)substream);
117 runtime->event = NULL;
118 runtime->buffer_size = PAGE_SIZE;
119 runtime->avail_min = 1;
120 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
121 runtime->avail = 0;
122 else
123 runtime->avail = runtime->buffer_size;
124 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
125 kfree(runtime);
126 return -ENOMEM;
127 }
128 runtime->appl_ptr = runtime->hw_ptr = 0;
129 substream->runtime = runtime;
130 return 0;
131}
132
48c9d417 133static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
1da177e4 134{
48c9d417 135 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 136
137 kfree(runtime->buffer);
138 kfree(runtime);
139 substream->runtime = NULL;
140 return 0;
141}
142
48c9d417 143static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
1da177e4
LT		 144{
145 if (up) {
146 tasklet_hi_schedule(&substream->runtime->tasklet);
147 } else {
148 tasklet_kill(&substream->runtime->tasklet);
149 substream->ops->trigger(substream, 0);
150 }
151}
152
48c9d417 153static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4
LT		 154{
155 substream->ops->trigger(substream, up);
156 if (!up && substream->runtime->event)
157 tasklet_kill(&substream->runtime->tasklet);
158}
159
48c9d417 160int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
1da177e4
LT		 161{
162 unsigned long flags;
48c9d417 163 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 164
165 snd_rawmidi_output_trigger(substream, 0);
166 runtime->drain = 0;
167 spin_lock_irqsave(&runtime->lock, flags);
168 runtime->appl_ptr = runtime->hw_ptr = 0;
169 runtime->avail = runtime->buffer_size;
170 spin_unlock_irqrestore(&runtime->lock, flags);
171 return 0;
172}
173
48c9d417 174int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
1da177e4
LT		 175{
176 int err;
177 long timeout;
48c9d417 178 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 179
180 err = 0;
181 runtime->drain = 1;
182 timeout = wait_event_interruptible_timeout(runtime->sleep,
183 (runtime->avail >= runtime->buffer_size),
184 10*HZ);
185 if (signal_pending(current))
186 err = -ERESTARTSYS;
187 if (runtime->avail < runtime->buffer_size && !timeout) {
188 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
189 err = -EIO;
190 }
191 runtime->drain = 0;
192 if (err != -ERESTARTSYS) {
193 /* we need wait a while to make sure that Tx FIFOs are empty */
194 if (substream->ops->drain)
195 substream->ops->drain(substream);
196 else
197 msleep(50);
198 snd_rawmidi_drop_output(substream);
199 }
200 return err;
201}
202
48c9d417 203int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
1da177e4
LT		 204{
205 unsigned long flags;
48c9d417 206 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 207
208 snd_rawmidi_input_trigger(substream, 0);
209 runtime->drain = 0;
210 spin_lock_irqsave(&runtime->lock, flags);
211 runtime->appl_ptr = runtime->hw_ptr = 0;
212 runtime->avail = 0;
213 spin_unlock_irqrestore(&runtime->lock, flags);
214 return 0;
215}
216
217int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice,
48c9d417 218 int mode, struct snd_rawmidi_file * rfile)
1da177e4 219{
48c9d417 220 struct snd_rawmidi *rmidi;
1da177e4 221 struct list_head *list1, *list2;
48c9d417
TI		 222 struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
223 struct snd_rawmidi_runtime *input = NULL, *output = NULL;
1da177e4
LT		 224 int err;
225
226 if (rfile)
227 rfile->input = rfile->output = NULL;
228 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
229 if (rmidi == NULL) {
230 err = -ENODEV;
231 goto __error1;
232 }
233 if (!try_module_get(rmidi->card->module)) {
234 err = -EFAULT;
235 goto __error1;
236 }
237 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
238 down(&rmidi->open_mutex);
239 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
240 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
241 err = -ENXIO;
242 goto __error;
243 }
244 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
245 err = -ENODEV;
246 goto __error;
247 }
248 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
249 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
250 err = -EAGAIN;
251 goto __error;
252 }
253 }
254 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
255 if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
256 err = -ENXIO;
257 goto __error;
258 }
259 if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
260 err = -ENODEV;
261 goto __error;
262 }
263 if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
264 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
265 err = -EAGAIN;
266 goto __error;
267 }
268 }
269 list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
270 while (1) {
271 if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
272 sinput = NULL;
273 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
274 err = -EAGAIN;
275 goto __error;
276 }
277 break;
278 }
48c9d417 279 sinput = list_entry(list1, struct snd_rawmidi_substream, list);
1da177e4
LT		 280 if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
281 goto __nexti;
282 if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
283 break;
284 __nexti:
285 list1 = list1->next;
286 }
287 list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
288 while (1) {
289 if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
290 soutput = NULL;
291 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
292 err = -EAGAIN;
293 goto __error;
294 }
295 break;
296 }
48c9d417 297 soutput = list_entry(list2, struct snd_rawmidi_substream, list);
1da177e4
LT		 298 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
299 if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
300 if (soutput->opened && !soutput->append)
301 goto __nexto;
302 } else {
303 if (soutput->opened)
304 goto __nexto;
305 }
306 }
307 if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
308 break;
309 __nexto:
310 list2 = list2->next;
311 }
312 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
313 if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
314 goto __error;
315 input = sinput->runtime;
316 if ((err = sinput->ops->open(sinput)) < 0)
317 goto __error;
318 sinput->opened = 1;
319 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
320 } else {
321 sinput = NULL;
322 }
323 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
324 if (soutput->opened)
325 goto __skip_output;
326 if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
327 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
328 sinput->ops->close(sinput);
329 goto __error;
330 }
331 output = soutput->runtime;
332 if ((err = soutput->ops->open(soutput)) < 0) {
333 if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
334 sinput->ops->close(sinput);
335 goto __error;
336 }
337 __skip_output:
338 soutput->opened = 1;
339 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
340 soutput->append = 1;
341 if (soutput->use_count++ == 0)
342 soutput->active_sensing = 1;
343 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
344 } else {
345 soutput = NULL;
346 }
347 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
348 up(&rmidi->open_mutex);
349 if (rfile) {
350 rfile->rmidi = rmidi;
351 rfile->input = sinput;
352 rfile->output = soutput;
353 }
354 return 0;
355
356 __error:
357 if (input != NULL)
358 snd_rawmidi_runtime_free(sinput);
359 if (output != NULL)
360 snd_rawmidi_runtime_free(soutput);
361 module_put(rmidi->card->module);
362 if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
363 up(&rmidi->open_mutex);
364 __error1:
365 return err;
366}
367
368static int snd_rawmidi_open(struct inode *inode, struct file *file)
369{
370 int maj = imajor(inode);
371 int cardnum;
48c9d417 372 struct snd_card *card;
1da177e4
LT		 373 int device, subdevice;
374 unsigned short fflags;
375 int err;
48c9d417
TI		 376 struct snd_rawmidi *rmidi;
377 struct snd_rawmidi_file *rawmidi_file;
1da177e4
LT		 378 wait_queue_t wait;
379 struct list_head *list;
48c9d417 380 struct snd_ctl_file *kctl;
1da177e4 381
f1902860 382 if (maj == snd_major) {
1da177e4
LT		 383 cardnum = SNDRV_MINOR_CARD(iminor(inode));
384 cardnum %= SNDRV_CARDS;
385 device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_RAWMIDI;
386 device %= SNDRV_MINOR_RAWMIDIS;
1da177e4 387#ifdef CONFIG_SND_OSSEMUL
f1902860 388 } else if (maj == SOUND_MAJOR) {
1da177e4
LT		 389 cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode));
390 cardnum %= SNDRV_CARDS;
391 device = SNDRV_MINOR_OSS_DEVICE(iminor(inode)) == SNDRV_MINOR_OSS_MIDI ?
392 midi_map[cardnum] : amidi_map[cardnum];
1da177e4 393#endif
f1902860 394 } else
1da177e4 395 return -ENXIO;
1da177e4
LT		 396
397 rmidi = snd_rawmidi_devices[(cardnum * SNDRV_RAWMIDI_DEVICES) + device];
398 if (rmidi == NULL)
399 return -ENODEV;
400#ifdef CONFIG_SND_OSSEMUL
401 if (maj == SOUND_MAJOR && !rmidi->ossreg)
402 return -ENXIO;
403#endif
404 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
405 return -EINVAL; /* invalid combination */
406 card = rmidi->card;
407 err = snd_card_file_add(card, file);
408 if (err < 0)
409 return -ENODEV;
410 fflags = snd_rawmidi_file_flags(file);
f1902860 411 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
1da177e4
LT		 412 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
413 fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
414 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
415 if (rawmidi_file == NULL) {
416 snd_card_file_remove(card, file);
417 return -ENOMEM;
418 }
419 init_waitqueue_entry(&wait, current);
420 add_wait_queue(&rmidi->open_wait, &wait);
421 down(&rmidi->open_mutex);
422 while (1) {
423 subdevice = -1;
424 down_read(&card->controls_rwsem);
425 list_for_each(list, &card->ctl_files) {
426 kctl = snd_ctl_file(list);
427 if (kctl->pid == current->pid) {
428 subdevice = kctl->prefer_rawmidi_subdevice;
429 break;
430 }
431 }
432 up_read(&card->controls_rwsem);
433 err = snd_rawmidi_kernel_open(cardnum, device, subdevice, fflags, rawmidi_file);
434 if (err >= 0)
435 break;
436 if (err == -EAGAIN) {
437 if (file->f_flags & O_NONBLOCK) {
438 err = -EBUSY;
439 break;
440 }
441 } else
442 break;
443 set_current_state(TASK_INTERRUPTIBLE);
444 up(&rmidi->open_mutex);
445 schedule();
446 down(&rmidi->open_mutex);
447 if (signal_pending(current)) {
448 err = -ERESTARTSYS;
449 break;
450 }
451 }
452#ifdef CONFIG_SND_OSSEMUL
453 if (rawmidi_file->input && rawmidi_file->input->runtime)
454 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
455 if (rawmidi_file->output && rawmidi_file->output->runtime)
456 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
457#endif
458 remove_wait_queue(&rmidi->open_wait, &wait);
459 if (err >= 0) {
460 file->private_data = rawmidi_file;
461 } else {
462 snd_card_file_remove(card, file);
463 kfree(rawmidi_file);
464 }
465 up(&rmidi->open_mutex);
466 return err;
467}
468
48c9d417 469int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
1da177e4 470{
48c9d417
TI		 471 struct snd_rawmidi *rmidi;
472 struct snd_rawmidi_substream *substream;
473 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 474
475 snd_assert(rfile != NULL, return -ENXIO);
476 snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
477 rmidi = rfile->rmidi;
478 down(&rmidi->open_mutex);
479 if (rfile->input != NULL) {
480 substream = rfile->input;
481 rfile->input = NULL;
482 runtime = substream->runtime;
483 snd_rawmidi_input_trigger(substream, 0);
484 substream->ops->close(substream);
485 if (runtime->private_free != NULL)
486 runtime->private_free(substream);
487 snd_rawmidi_runtime_free(substream);
488 substream->opened = 0;
489 rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
490 }
491 if (rfile->output != NULL) {
492 substream = rfile->output;
493 rfile->output = NULL;
494 if (--substream->use_count == 0) {
495 runtime = substream->runtime;
496 if (substream->active_sensing) {
497 unsigned char buf = 0xfe;
498 /* sending single active sensing message to shut the device up */
499 snd_rawmidi_kernel_write(substream, &buf, 1);
500 }
501 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
502 snd_rawmidi_output_trigger(substream, 0);
503 substream->ops->close(substream);
504 if (runtime->private_free != NULL)
505 runtime->private_free(substream);
506 snd_rawmidi_runtime_free(substream);
507 substream->opened = 0;
508 substream->append = 0;
509 }
510 rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
511 }
512 up(&rmidi->open_mutex);
513 module_put(rmidi->card->module);
514 return 0;
515}
516
517static int snd_rawmidi_release(struct inode *inode, struct file *file)
518{
48c9d417
TI		 519 struct snd_rawmidi_file *rfile;
520 struct snd_rawmidi *rmidi;
1da177e4
LT		 521 int err;
522
523 rfile = file->private_data;
524 err = snd_rawmidi_kernel_release(rfile);
525 rmidi = rfile->rmidi;
526 wake_up(&rmidi->open_wait);
527 kfree(rfile);
528 snd_card_file_remove(rmidi->card, file);
529 return err;
530}
531
48c9d417
TI		 532int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
533 struct snd_rawmidi_info *info)
1da177e4 534{
48c9d417 535 struct snd_rawmidi *rmidi;
1da177e4
LT		 536
537 if (substream == NULL)
538 return -ENODEV;
539 rmidi = substream->rmidi;
540 memset(info, 0, sizeof(*info));
541 info->card = rmidi->card->number;
542 info->device = rmidi->device;
543 info->subdevice = substream->number;
544 info->stream = substream->stream;
545 info->flags = rmidi->info_flags;
546 strcpy(info->id, rmidi->id);
547 strcpy(info->name, rmidi->name);
548 strcpy(info->subname, substream->name);
549 info->subdevices_count = substream->pstr->substream_count;
550 info->subdevices_avail = (substream->pstr->substream_count -
551 substream->pstr->substream_opened);
552 return 0;
553}
554
48c9d417
TI		 555static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
556 struct snd_rawmidi_info __user * _info)
1da177e4 557{
48c9d417 558 struct snd_rawmidi_info info;
1da177e4
LT		 559 int err;
560 if ((err = snd_rawmidi_info(substream, &info)) < 0)
561 return err;
48c9d417 562 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
1da177e4
LT		 563 return -EFAULT;
564 return 0;
565}
566
48c9d417 567int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
1da177e4 568{
48c9d417
TI		 569 struct snd_rawmidi *rmidi;
570 struct snd_rawmidi_str *pstr;
571 struct snd_rawmidi_substream *substream;
1da177e4
LT		 572 struct list_head *list;
573 if (info->device >= SNDRV_RAWMIDI_DEVICES)
574 return -ENXIO;
575 rmidi = snd_rawmidi_devices[card->number * SNDRV_RAWMIDI_DEVICES + info->device];
a106cd3d
CL		 576 if (!rmidi)
577 return -ENXIO;
1da177e4
LT		 578 if (info->stream < 0 || info->stream > 1)
579 return -EINVAL;
580 pstr = &rmidi->streams[info->stream];
581 if (pstr->substream_count == 0)
582 return -ENOENT;
583 if (info->subdevice >= pstr->substream_count)
584 return -ENXIO;
585 list_for_each(list, &pstr->substreams) {
48c9d417 586 substream = list_entry(list, struct snd_rawmidi_substream, list);
1da177e4
LT		 587 if ((unsigned int)substream->number == info->subdevice)
588 return snd_rawmidi_info(substream, info);
589 }
590 return -ENXIO;
591}
592
48c9d417
TI		 593static int snd_rawmidi_info_select_user(struct snd_card *card,
594 struct snd_rawmidi_info __user *_info)
1da177e4
LT		 595{
596 int err;
48c9d417 597 struct snd_rawmidi_info info;
1da177e4
LT		 598 if (get_user(info.device, &_info->device))
599 return -EFAULT;
600 if (get_user(info.stream, &_info->stream))
601 return -EFAULT;
602 if (get_user(info.subdevice, &_info->subdevice))
603 return -EFAULT;
604 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
605 return err;
48c9d417 606 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
1da177e4
LT		 607 return -EFAULT;
608 return 0;
609}
610
48c9d417
TI		 611int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
612 struct snd_rawmidi_params * params)
1da177e4
LT		 613{
614 char *newbuf;
48c9d417 615 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 616
617 if (substream->append && substream->use_count > 1)
618 return -EBUSY;
619 snd_rawmidi_drain_output(substream);
620 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
621 return -EINVAL;
622 }
623 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
624 return -EINVAL;
625 }
626 if (params->buffer_size != runtime->buffer_size) {
627 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
628 return -ENOMEM;
629 kfree(runtime->buffer);
630 runtime->buffer = newbuf;
631 runtime->buffer_size = params->buffer_size;
632 }
633 runtime->avail_min = params->avail_min;
634 substream->active_sensing = !params->no_active_sensing;
635 return 0;
636}
637
48c9d417
TI		 638int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
639 struct snd_rawmidi_params * params)
1da177e4
LT		 640{
641 char *newbuf;
48c9d417 642 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 643
644 snd_rawmidi_drain_input(substream);
645 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
646 return -EINVAL;
647 }
648 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
649 return -EINVAL;
650 }
651 if (params->buffer_size != runtime->buffer_size) {
652 if ((newbuf = (char *) kmalloc(params->buffer_size, GFP_KERNEL)) == NULL)
653 return -ENOMEM;
654 kfree(runtime->buffer);
655 runtime->buffer = newbuf;
656 runtime->buffer_size = params->buffer_size;
657 }
658 runtime->avail_min = params->avail_min;
659 return 0;
660}
661
48c9d417
TI		 662static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
663 struct snd_rawmidi_status * status)
1da177e4 664{
48c9d417 665 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 666
667 memset(status, 0, sizeof(*status));
668 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
669 spin_lock_irq(&runtime->lock);
670 status->avail = runtime->avail;
671 spin_unlock_irq(&runtime->lock);
672 return 0;
673}
674
48c9d417
TI		 675static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
676 struct snd_rawmidi_status * status)
1da177e4 677{
48c9d417 678 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 679
680 memset(status, 0, sizeof(*status));
681 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
682 spin_lock_irq(&runtime->lock);
683 status->avail = runtime->avail;
684 status->xruns = runtime->xruns;
685 runtime->xruns = 0;
686 spin_unlock_irq(&runtime->lock);
687 return 0;
688}
689
690static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
691{
48c9d417 692 struct snd_rawmidi_file *rfile;
1da177e4
LT		 693 void __user *argp = (void __user *)arg;
694
695 rfile = file->private_data;
696 if (((cmd >> 8) & 0xff) != 'W')
697 return -ENOTTY;
698 switch (cmd) {
699 case SNDRV_RAWMIDI_IOCTL_PVERSION:
700 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
701 case SNDRV_RAWMIDI_IOCTL_INFO:
702 {
48c9d417
TI		 703 int stream;
704 struct snd_rawmidi_info __user *info = argp;
1da177e4
LT		 705 if (get_user(stream, &info->stream))
706 return -EFAULT;
707 switch (stream) {
708 case SNDRV_RAWMIDI_STREAM_INPUT:
709 return snd_rawmidi_info_user(rfile->input, info);
710 case SNDRV_RAWMIDI_STREAM_OUTPUT:
711 return snd_rawmidi_info_user(rfile->output, info);
712 default:
713 return -EINVAL;
714 }
715 }
716 case SNDRV_RAWMIDI_IOCTL_PARAMS:
717 {
48c9d417
TI		 718 struct snd_rawmidi_params params;
719 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
1da177e4
LT		 720 return -EFAULT;
721 switch (params.stream) {
722 case SNDRV_RAWMIDI_STREAM_OUTPUT:
723 if (rfile->output == NULL)
724 return -EINVAL;
725 return snd_rawmidi_output_params(rfile->output, &params);
726 case SNDRV_RAWMIDI_STREAM_INPUT:
727 if (rfile->input == NULL)
728 return -EINVAL;
729 return snd_rawmidi_input_params(rfile->input, &params);
730 default:
731 return -EINVAL;
732 }
733 }
734 case SNDRV_RAWMIDI_IOCTL_STATUS:
735 {
736 int err = 0;
48c9d417
TI		 737 struct snd_rawmidi_status status;
738 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
1da177e4
LT		 739 return -EFAULT;
740 switch (status.stream) {
741 case SNDRV_RAWMIDI_STREAM_OUTPUT:
742 if (rfile->output == NULL)
743 return -EINVAL;
744 err = snd_rawmidi_output_status(rfile->output, &status);
745 break;
746 case SNDRV_RAWMIDI_STREAM_INPUT:
747 if (rfile->input == NULL)
748 return -EINVAL;
749 err = snd_rawmidi_input_status(rfile->input, &status);
750 break;
751 default:
752 return -EINVAL;
753 }
754 if (err < 0)
755 return err;
48c9d417 756 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
1da177e4
LT		 757 return -EFAULT;
758 return 0;
759 }
760 case SNDRV_RAWMIDI_IOCTL_DROP:
761 {
762 int val;
763 if (get_user(val, (int __user *) argp))
764 return -EFAULT;
765 switch (val) {
766 case SNDRV_RAWMIDI_STREAM_OUTPUT:
767 if (rfile->output == NULL)
768 return -EINVAL;
769 return snd_rawmidi_drop_output(rfile->output);
770 default:
771 return -EINVAL;
772 }
773 }
774 case SNDRV_RAWMIDI_IOCTL_DRAIN:
775 {
776 int val;
777 if (get_user(val, (int __user *) argp))
778 return -EFAULT;
779 switch (val) {
780 case SNDRV_RAWMIDI_STREAM_OUTPUT:
781 if (rfile->output == NULL)
782 return -EINVAL;
783 return snd_rawmidi_drain_output(rfile->output);
784 case SNDRV_RAWMIDI_STREAM_INPUT:
785 if (rfile->input == NULL)
786 return -EINVAL;
787 return snd_rawmidi_drain_input(rfile->input);
788 default:
789 return -EINVAL;
790 }
791 }
792#ifdef CONFIG_SND_DEBUG
793 default:
794 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
795#endif
796 }
797 return -ENOTTY;
798}
799
48c9d417
TI		 800static int snd_rawmidi_control_ioctl(struct snd_card *card,
801 struct snd_ctl_file *control,
1da177e4
LT		 802 unsigned int cmd,
803 unsigned long arg)
804{
805 void __user *argp = (void __user *)arg;
806 unsigned int tmp;
807
808 tmp = card->number * SNDRV_RAWMIDI_DEVICES;
809 switch (cmd) {
810 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
811 {
812 int device;
813
814 if (get_user(device, (int __user *)argp))
815 return -EFAULT;
816 device = device < 0 ? 0 : device + 1;
817 while (device < SNDRV_RAWMIDI_DEVICES) {
818 if (snd_rawmidi_devices[tmp + device])
819 break;
820 device++;
821 }
822 if (device == SNDRV_RAWMIDI_DEVICES)
823 device = -1;
824 if (put_user(device, (int __user *)argp))
825 return -EFAULT;
826 return 0;
827 }
828 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
829 {
830 int val;
831
832 if (get_user(val, (int __user *)argp))
833 return -EFAULT;
834 control->prefer_rawmidi_subdevice = val;
835 return 0;
836 }
837 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
838 return snd_rawmidi_info_select_user(card, argp);
839 }
840 return -ENOIOCTLCMD;
841}
842
843/**
844 * snd_rawmidi_receive - receive the input data from the device
845 * @substream: the rawmidi substream
846 * @buffer: the buffer pointer
847 * @count: the data size to read
848 *
849 * Reads the data from the internal buffer.
850 *
851 * Returns the size of read data, or a negative error code on failure.
852 */
48c9d417
TI		 853int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
854 const unsigned char *buffer, int count)
1da177e4
LT		 855{
856 unsigned long flags;
857 int result = 0, count1;
48c9d417 858 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 859
860 if (runtime->buffer == NULL) {
861 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
862 return -EINVAL;
863 }
864 spin_lock_irqsave(&runtime->lock, flags);
865 if (count == 1) { /* special case, faster code */
866 substream->bytes++;
867 if (runtime->avail < runtime->buffer_size) {
868 runtime->buffer[runtime->hw_ptr++] = buffer[0];
869 runtime->hw_ptr %= runtime->buffer_size;
870 runtime->avail++;
871 result++;
872 } else {
873 runtime->xruns++;
874 }
875 } else {
876 substream->bytes += count;
877 count1 = runtime->buffer_size - runtime->hw_ptr;
878 if (count1 > count)
879 count1 = count;
880 if (count1 > (int)(runtime->buffer_size - runtime->avail))
881 count1 = runtime->buffer_size - runtime->avail;
882 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
883 runtime->hw_ptr += count1;
884 runtime->hw_ptr %= runtime->buffer_size;
885 runtime->avail += count1;
886 count -= count1;
887 result += count1;
888 if (count > 0) {
889 buffer += count1;
890 count1 = count;
891 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
892 count1 = runtime->buffer_size - runtime->avail;
893 runtime->xruns += count - count1;
894 }
895 if (count1 > 0) {
896 memcpy(runtime->buffer, buffer, count1);
897 runtime->hw_ptr = count1;
898 runtime->avail += count1;
899 result += count1;
900 }
901 }
902 }
903 if (result > 0) {
904 if (runtime->event)
905 tasklet_hi_schedule(&runtime->tasklet);
906 else if (snd_rawmidi_ready(substream))
907 wake_up(&runtime->sleep);
908 }
909 spin_unlock_irqrestore(&runtime->lock, flags);
910 return result;
911}
912
48c9d417 913static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
1da177e4
LT		 914 unsigned char *buf, long count, int kernel)
915{
916 unsigned long flags;
917 long result = 0, count1;
48c9d417 918 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 919
920 while (count > 0 && runtime->avail) {
921 count1 = runtime->buffer_size - runtime->appl_ptr;
922 if (count1 > count)
923 count1 = count;
924 spin_lock_irqsave(&runtime->lock, flags);
925 if (count1 > (int)runtime->avail)
926 count1 = runtime->avail;
927 if (kernel) {
928 memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1);
929 } else {
930 spin_unlock_irqrestore(&runtime->lock, flags);
931 if (copy_to_user((char __user *)buf + result,
932 runtime->buffer + runtime->appl_ptr, count1)) {
933 return result > 0 ? result : -EFAULT;
934 }
935 spin_lock_irqsave(&runtime->lock, flags);
936 }
937 runtime->appl_ptr += count1;
938 runtime->appl_ptr %= runtime->buffer_size;
939 runtime->avail -= count1;
940 spin_unlock_irqrestore(&runtime->lock, flags);
941 result += count1;
942 count -= count1;
943 }
944 return result;
945}
946
48c9d417
TI		 947long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
948 unsigned char *buf, long count)
1da177e4
LT		 949{
950 snd_rawmidi_input_trigger(substream, 1);
951 return snd_rawmidi_kernel_read1(substream, buf, count, 1);
952}
953
48c9d417
TI		 954static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
955 loff_t *offset)
1da177e4
LT		 956{
957 long result;
958 int count1;
48c9d417
TI		 959 struct snd_rawmidi_file *rfile;
960 struct snd_rawmidi_substream *substream;
961 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 962
963 rfile = file->private_data;
964 substream = rfile->input;
965 if (substream == NULL)
966 return -EIO;
967 runtime = substream->runtime;
968 snd_rawmidi_input_trigger(substream, 1);
969 result = 0;
970 while (count > 0) {
971 spin_lock_irq(&runtime->lock);
972 while (!snd_rawmidi_ready(substream)) {
973 wait_queue_t wait;
974 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
975 spin_unlock_irq(&runtime->lock);
976 return result > 0 ? result : -EAGAIN;
977 }
978 init_waitqueue_entry(&wait, current);
979 add_wait_queue(&runtime->sleep, &wait);
980 set_current_state(TASK_INTERRUPTIBLE);
981 spin_unlock_irq(&runtime->lock);
982 schedule();
983 remove_wait_queue(&runtime->sleep, &wait);
984 if (signal_pending(current))
985 return result > 0 ? result : -ERESTARTSYS;
986 if (!runtime->avail)
987 return result > 0 ? result : -EIO;
988 spin_lock_irq(&runtime->lock);
989 }
990 spin_unlock_irq(&runtime->lock);
4d23359b
CL		 991 count1 = snd_rawmidi_kernel_read1(substream,
992 (unsigned char __force *)buf,
993 count, 0);
1da177e4
LT		 994 if (count1 < 0)
995 return result > 0 ? result : count1;
996 result += count1;
997 buf += count1;
998 count -= count1;
999 }
1000 return result;
1001}
1002
1003/**
1004 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1005 * @substream: the rawmidi substream
1006 *
1007 * Returns 1 if the internal output buffer is empty, 0 if not.
1008 */
48c9d417 1009int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1da177e4 1010{
48c9d417 1011 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1012 int result;
1013 unsigned long flags;
1014
1015 if (runtime->buffer == NULL) {
1016 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1017 return 1;
1018 }
1019 spin_lock_irqsave(&runtime->lock, flags);
1020 result = runtime->avail >= runtime->buffer_size;
1021 spin_unlock_irqrestore(&runtime->lock, flags);
1022 return result;
1023}
1024
1025/**
1026 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1027 * @substream: the rawmidi substream
1028 * @buffer: the buffer pointer
1029 * @count: data size to transfer
1030 *
1031 * Copies data from the internal output buffer to the given buffer.
1032 *
1033 * Call this in the interrupt handler when the midi output is ready,
1034 * and call snd_rawmidi_transmit_ack() after the transmission is
1035 * finished.
1036 *
1037 * Returns the size of copied data, or a negative error code on failure.
1038 */
48c9d417
TI		 1039int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1040 unsigned char *buffer, int count)
1da177e4
LT		 1041{
1042 unsigned long flags;
1043 int result, count1;
48c9d417 1044 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1045
1046 if (runtime->buffer == NULL) {
1047 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1048 return -EINVAL;
1049 }
1050 result = 0;
1051 spin_lock_irqsave(&runtime->lock, flags);
1052 if (runtime->avail >= runtime->buffer_size) {
1053 /* warning: lowlevel layer MUST trigger down the hardware */
1054 goto __skip;
1055 }
1056 if (count == 1) { /* special case, faster code */
1057 *buffer = runtime->buffer[runtime->hw_ptr];
1058 result++;
1059 } else {
1060 count1 = runtime->buffer_size - runtime->hw_ptr;
1061 if (count1 > count)
1062 count1 = count;
1063 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1064 count1 = runtime->buffer_size - runtime->avail;
1065 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1066 count -= count1;
1067 result += count1;
1068 if (count > 0) {
1069 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1070 count = runtime->buffer_size - runtime->avail - count1;
1071 memcpy(buffer + count1, runtime->buffer, count);
1072 result += count;
1073 }
1074 }
1075 __skip:
1076 spin_unlock_irqrestore(&runtime->lock, flags);
1077 return result;
1078}
1079
1080/**
1081 * snd_rawmidi_transmit_ack - acknowledge the transmission
1082 * @substream: the rawmidi substream
1083 * @count: the tranferred count
1084 *
1085 * Advances the hardware pointer for the internal output buffer with
1086 * the given size and updates the condition.
1087 * Call after the transmission is finished.
1088 *
1089 * Returns the advanced size if successful, or a negative error code on failure.
1090 */
48c9d417 1091int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1da177e4
LT		 1092{
1093 unsigned long flags;
48c9d417 1094 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1095
1096 if (runtime->buffer == NULL) {
1097 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1098 return -EINVAL;
1099 }
1100 spin_lock_irqsave(&runtime->lock, flags);
1101 snd_assert(runtime->avail + count <= runtime->buffer_size, );
1102 runtime->hw_ptr += count;
1103 runtime->hw_ptr %= runtime->buffer_size;
1104 runtime->avail += count;
1105 substream->bytes += count;
1106 if (count > 0) {
1107 if (runtime->drain || snd_rawmidi_ready(substream))
1108 wake_up(&runtime->sleep);
1109 }
1110 spin_unlock_irqrestore(&runtime->lock, flags);
1111 return count;
1112}
1113
1114/**
1115 * snd_rawmidi_transmit - copy from the buffer to the device
1116 * @substream: the rawmidi substream
df8db936 1117 * @buffer: the buffer pointer
1da177e4
LT		 1118 * @count: the data size to transfer
1119 *
1120 * Copies data from the buffer to the device and advances the pointer.
1121 *
1122 * Returns the copied size if successful, or a negative error code on failure.
1123 */
48c9d417
TI		 1124int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1125 unsigned char *buffer, int count)
1da177e4
LT		 1126{
1127 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1128 if (count < 0)
1129 return count;
1130 return snd_rawmidi_transmit_ack(substream, count);
1131}
1132
48c9d417
TI		 1133static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1134 const unsigned char *buf, long count, int kernel)
1da177e4
LT		 1135{
1136 unsigned long flags;
1137 long count1, result;
48c9d417 1138 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1139
1140 snd_assert(buf != NULL, return -EINVAL);
1141 snd_assert(runtime->buffer != NULL, return -EINVAL);
1142
1143 result = 0;
1144 spin_lock_irqsave(&runtime->lock, flags);
1145 if (substream->append) {
1146 if ((long)runtime->avail < count) {
1147 spin_unlock_irqrestore(&runtime->lock, flags);
1148 return -EAGAIN;
1149 }
1150 }
1151 while (count > 0 && runtime->avail > 0) {
1152 count1 = runtime->buffer_size - runtime->appl_ptr;
1153 if (count1 > count)
1154 count1 = count;
1155 if (count1 > (long)runtime->avail)
1156 count1 = runtime->avail;
1157 if (kernel) {
1158 memcpy(runtime->buffer + runtime->appl_ptr, buf, count1);
1159 } else {
1160 spin_unlock_irqrestore(&runtime->lock, flags);
1161 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
1162 (char __user *)buf, count1)) {
1163 spin_lock_irqsave(&runtime->lock, flags);
1164 result = result > 0 ? result : -EFAULT;
1165 goto __end;
1166 }
1167 spin_lock_irqsave(&runtime->lock, flags);
1168 }
1169 runtime->appl_ptr += count1;
1170 runtime->appl_ptr %= runtime->buffer_size;
1171 runtime->avail -= count1;
1172 result += count1;
1173 buf += count1;
1174 count -= count1;
1175 }
1176 __end:
1177 count1 = runtime->avail < runtime->buffer_size;
1178 spin_unlock_irqrestore(&runtime->lock, flags);
1179 if (count1)
1180 snd_rawmidi_output_trigger(substream, 1);
1181 return result;
1182}
1183
48c9d417
TI		 1184long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1185 const unsigned char *buf, long count)
1da177e4
LT		 1186{
1187 return snd_rawmidi_kernel_write1(substream, buf, count, 1);
1188}
1189
48c9d417
TI		 1190static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1191 size_t count, loff_t *offset)
1da177e4
LT		 1192{
1193 long result, timeout;
1194 int count1;
48c9d417
TI		 1195 struct snd_rawmidi_file *rfile;
1196 struct snd_rawmidi_runtime *runtime;
1197 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1198
1199 rfile = file->private_data;
1200 substream = rfile->output;
1201 runtime = substream->runtime;
1202 /* we cannot put an atomic message to our buffer */
1203 if (substream->append && count > runtime->buffer_size)
1204 return -EIO;
1205 result = 0;
1206 while (count > 0) {
1207 spin_lock_irq(&runtime->lock);
1208 while (!snd_rawmidi_ready_append(substream, count)) {
1209 wait_queue_t wait;
1210 if (file->f_flags & O_NONBLOCK) {
1211 spin_unlock_irq(&runtime->lock);
1212 return result > 0 ? result : -EAGAIN;
1213 }
1214 init_waitqueue_entry(&wait, current);
1215 add_wait_queue(&runtime->sleep, &wait);
1216 set_current_state(TASK_INTERRUPTIBLE);
1217 spin_unlock_irq(&runtime->lock);
1218 timeout = schedule_timeout(30 * HZ);
1219 remove_wait_queue(&runtime->sleep, &wait);
1220 if (signal_pending(current))
1221 return result > 0 ? result : -ERESTARTSYS;
1222 if (!runtime->avail && !timeout)
1223 return result > 0 ? result : -EIO;
1224 spin_lock_irq(&runtime->lock);
1225 }
1226 spin_unlock_irq(&runtime->lock);
4d23359b
CL		 1227 count1 = snd_rawmidi_kernel_write1(substream,
1228 (unsigned char __force *)buf,
1229 count, 0);
1da177e4
LT		 1230 if (count1 < 0)
1231 return result > 0 ? result : count1;
1232 result += count1;
1233 buf += count1;
1234 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1235 break;
1236 count -= count1;
1237 }
1238 if (file->f_flags & O_SYNC) {
1239 spin_lock_irq(&runtime->lock);
1240 while (runtime->avail != runtime->buffer_size) {
1241 wait_queue_t wait;
1242 unsigned int last_avail = runtime->avail;
1243 init_waitqueue_entry(&wait, current);
1244 add_wait_queue(&runtime->sleep, &wait);
1245 set_current_state(TASK_INTERRUPTIBLE);
1246 spin_unlock_irq(&runtime->lock);
1247 timeout = schedule_timeout(30 * HZ);
1248 remove_wait_queue(&runtime->sleep, &wait);
1249 if (signal_pending(current))
1250 return result > 0 ? result : -ERESTARTSYS;
1251 if (runtime->avail == last_avail && !timeout)
1252 return result > 0 ? result : -EIO;
1253 spin_lock_irq(&runtime->lock);
1254 }
1255 spin_unlock_irq(&runtime->lock);
1256 }
1257 return result;
1258}
1259
1260static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1261{
48c9d417
TI		 1262 struct snd_rawmidi_file *rfile;
1263 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 1264 unsigned int mask;
1265
1266 rfile = file->private_data;
1267 if (rfile->input != NULL) {
1268 runtime = rfile->input->runtime;
1269 snd_rawmidi_input_trigger(rfile->input, 1);
1270 poll_wait(file, &runtime->sleep, wait);
1271 }
1272 if (rfile->output != NULL) {
1273 runtime = rfile->output->runtime;
1274 poll_wait(file, &runtime->sleep, wait);
1275 }
1276 mask = 0;
1277 if (rfile->input != NULL) {
1278 if (snd_rawmidi_ready(rfile->input))
1279 mask |= POLLIN | POLLRDNORM;
1280 }
1281 if (rfile->output != NULL) {
1282 if (snd_rawmidi_ready(rfile->output))
1283 mask |= POLLOUT | POLLWRNORM;
1284 }
1285 return mask;
1286}
1287
1288/*
1289 */
1290#ifdef CONFIG_COMPAT
1291#include "rawmidi_compat.c"
1292#else
1293#define snd_rawmidi_ioctl_compat NULL
1294#endif
1295
1296/*
1297
1298 */
1299
48c9d417
TI		 1300static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1301 struct snd_info_buffer *buffer)
1da177e4 1302{
48c9d417
TI		 1303 struct snd_rawmidi *rmidi;
1304 struct snd_rawmidi_substream *substream;
1305 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 1306 struct list_head *list;
1307
1308 rmidi = entry->private_data;
1309 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1310 down(&rmidi->open_mutex);
1311 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1312 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
48c9d417 1313 substream = list_entry(list, struct snd_rawmidi_substream, list);
1da177e4
LT		 1314 snd_iprintf(buffer,
1315 "Output %d\n"
1316 " Tx bytes : %lu\n",
1317 substream->number,
1318 (unsigned long) substream->bytes);
1319 if (substream->opened) {
1320 runtime = substream->runtime;
1321 snd_iprintf(buffer,
1322 " Mode : %s\n"
1323 " Buffer size : %lu\n"
1324 " Avail : %lu\n",
1325 runtime->oss ? "OSS compatible" : "native",
1326 (unsigned long) runtime->buffer_size,
1327 (unsigned long) runtime->avail);
1328 }
1329 }
1330 }
1331 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1332 list_for_each(list, &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
48c9d417 1333 substream = list_entry(list, struct snd_rawmidi_substream, list);
1da177e4
LT		 1334 snd_iprintf(buffer,
1335 "Input %d\n"
1336 " Rx bytes : %lu\n",
1337 substream->number,
1338 (unsigned long) substream->bytes);
1339 if (substream->opened) {
1340 runtime = substream->runtime;
1341 snd_iprintf(buffer,
1342 " Buffer size : %lu\n"
1343 " Avail : %lu\n"
1344 " Overruns : %lu\n",
1345 (unsigned long) runtime->buffer_size,
1346 (unsigned long) runtime->avail,
1347 (unsigned long) runtime->xruns);
1348 }
1349 }
1350 }
1351 up(&rmidi->open_mutex);
1352}
1353
1354/*
1355 * Register functions
1356 */
1357
1358static struct file_operations snd_rawmidi_f_ops =
1359{
1360 .owner = THIS_MODULE,
1361 .read = snd_rawmidi_read,
1362 .write = snd_rawmidi_write,
1363 .open = snd_rawmidi_open,
1364 .release = snd_rawmidi_release,
1365 .poll = snd_rawmidi_poll,
1366 .unlocked_ioctl = snd_rawmidi_ioctl,
1367 .compat_ioctl = snd_rawmidi_ioctl_compat,
1368};
1369
48c9d417
TI		 1370static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1371 struct snd_rawmidi_str *stream,
1da177e4
LT		 1372 int direction,
1373 int count)
1374{
48c9d417 1375 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1376 int idx;
1377
1378 INIT_LIST_HEAD(&stream->substreams);
1379 for (idx = 0; idx < count; idx++) {
ca2c0966 1380 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
73e77ba0
TI		 1381 if (substream == NULL) {
1382 snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1da177e4 1383 return -ENOMEM;
73e77ba0 1384 }
1da177e4
LT		 1385 substream->stream = direction;
1386 substream->number = idx;
1387 substream->rmidi = rmidi;
1388 substream->pstr = stream;
1389 list_add_tail(&substream->list, &stream->substreams);
1390 stream->substream_count++;
1391 }
1392 return 0;
1393}
1394
1395/**
1396 * snd_rawmidi_new - create a rawmidi instance
1397 * @card: the card instance
1398 * @id: the id string
1399 * @device: the device index
1400 * @output_count: the number of output streams
1401 * @input_count: the number of input streams
1402 * @rrawmidi: the pointer to store the new rawmidi instance
1403 *
1404 * Creates a new rawmidi instance.
1405 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1406 *
1407 * Returns zero if successful, or a negative error code on failure.
1408 */
48c9d417 1409int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1da177e4 1410 int output_count, int input_count,
48c9d417 1411 struct snd_rawmidi ** rrawmidi)
1da177e4 1412{
48c9d417 1413 struct snd_rawmidi *rmidi;
1da177e4 1414 int err;
48c9d417 1415 static struct snd_device_ops ops = {
1da177e4
LT		 1416 .dev_free = snd_rawmidi_dev_free,
1417 .dev_register = snd_rawmidi_dev_register,
1418 .dev_disconnect = snd_rawmidi_dev_disconnect,
1419 .dev_unregister = snd_rawmidi_dev_unregister
1420 };
1421
1422 snd_assert(rrawmidi != NULL, return -EINVAL);
1423 *rrawmidi = NULL;
1424 snd_assert(card != NULL, return -ENXIO);
ca2c0966 1425 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
73e77ba0
TI		 1426 if (rmidi == NULL) {
1427 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1da177e4 1428 return -ENOMEM;
73e77ba0 1429 }
1da177e4
LT		 1430 rmidi->card = card;
1431 rmidi->device = device;
1432 init_MUTEX(&rmidi->open_mutex);
1433 init_waitqueue_head(&rmidi->open_wait);
1434 if (id != NULL)
1435 strlcpy(rmidi->id, id, sizeof(rmidi->id));
73e77ba0
TI		 1436 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1437 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1438 SNDRV_RAWMIDI_STREAM_INPUT,
1439 input_count)) < 0) {
1da177e4
LT		 1440 snd_rawmidi_free(rmidi);
1441 return err;
1442 }
73e77ba0
TI		 1443 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1444 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1445 SNDRV_RAWMIDI_STREAM_OUTPUT,
1446 output_count)) < 0) {
1da177e4
LT		 1447 snd_rawmidi_free(rmidi);
1448 return err;
1449 }
1450 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1451 snd_rawmidi_free(rmidi);
1452 return err;
1453 }
1454 *rrawmidi = rmidi;
1455 return 0;
1456}
1457
48c9d417 1458static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1da177e4 1459{
48c9d417 1460 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1461
1462 while (!list_empty(&stream->substreams)) {
48c9d417 1463 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1da177e4
LT		 1464 list_del(&substream->list);
1465 kfree(substream);
1466 }
1467}
1468
48c9d417 1469static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1da177e4
LT		 1470{
1471 snd_assert(rmidi != NULL, return -ENXIO);
1472 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1473 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1474 if (rmidi->private_free)
1475 rmidi->private_free(rmidi);
1476 kfree(rmidi);
1477 return 0;
1478}
1479
48c9d417 1480static int snd_rawmidi_dev_free(struct snd_device *device)
1da177e4 1481{
48c9d417 1482 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1483 return snd_rawmidi_free(rmidi);
1484}
1485
1486#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
48c9d417 1487static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1da177e4 1488{
48c9d417 1489 struct snd_rawmidi *rmidi = device->private_data;
1da177e4
LT		 1490 rmidi->seq_dev = NULL;
1491}
1492#endif
1493
48c9d417 1494static int snd_rawmidi_dev_register(struct snd_device *device)
1da177e4
LT		 1495{
1496 int idx, err;
48c9d417 1497 struct snd_info_entry *entry;
1da177e4 1498 char name[16];
48c9d417 1499 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1500
1501 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1502 return -ENOMEM;
1503 down(&register_mutex);
1504 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1505 if (snd_rawmidi_devices[idx] != NULL) {
1506 up(&register_mutex);
1507 return -EBUSY;
1508 }
1509 snd_rawmidi_devices[idx] = rmidi;
1510 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1511 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1512 rmidi->card, rmidi->device,
2af677fc 1513 &snd_rawmidi_f_ops, name)) < 0) {
1da177e4
LT		 1514 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
1515 snd_rawmidi_devices[idx] = NULL;
1516 up(&register_mutex);
1517 return err;
1518 }
1519 if (rmidi->ops && rmidi->ops->dev_register &&
1520 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1521 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1522 snd_rawmidi_devices[idx] = NULL;
1523 up(&register_mutex);
1524 return err;
1525 }
1526#ifdef CONFIG_SND_OSSEMUL
1527 rmidi->ossreg = 0;
1528 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1529 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
2af677fc
CL		 1530 rmidi->card, 0,
1531 &snd_rawmidi_f_ops, name) < 0) {
1da177e4
LT		 1532 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1533 } else {
1534 rmidi->ossreg++;
1535#ifdef SNDRV_OSS_INFO_DEV_MIDI
1536 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1537#endif
1538 }
1539 }
1540 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1541 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
2af677fc
CL		 1542 rmidi->card, 1,
1543 &snd_rawmidi_f_ops, name) < 0) {
1da177e4
LT		 1544 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1545 } else {
1546 rmidi->ossreg++;
1547 }
1548 }
1549#endif /* CONFIG_SND_OSSEMUL */
1550 up(&register_mutex);
1551 sprintf(name, "midi%d", rmidi->device);
1552 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1553 if (entry) {
1554 entry->private_data = rmidi;
1555 entry->c.text.read_size = 1024;
1556 entry->c.text.read = snd_rawmidi_proc_info_read;
1557 if (snd_info_register(entry) < 0) {
1558 snd_info_free_entry(entry);
1559 entry = NULL;
1560 }
1561 }
1562 rmidi->proc_entry = entry;
1563#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1564 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1565 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1566 rmidi->seq_dev->private_data = rmidi;
1567 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1568 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1569 snd_device_register(rmidi->card, rmidi->seq_dev);
1570 }
1571 }
1572#endif
1573 return 0;
1574}
1575
48c9d417 1576static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1da177e4 1577{
48c9d417 1578 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1579 int idx;
1580
1581 down(&register_mutex);
1582 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1583 snd_rawmidi_devices[idx] = NULL;
1584 up(&register_mutex);
1585 return 0;
1586}
1587
48c9d417 1588static int snd_rawmidi_dev_unregister(struct snd_device *device)
1da177e4
LT		 1589{
1590 int idx;
48c9d417 1591 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1592
1593 snd_assert(rmidi != NULL, return -ENXIO);
1594 down(&register_mutex);
1595 idx = (rmidi->card->number * SNDRV_RAWMIDI_DEVICES) + rmidi->device;
1596 snd_rawmidi_devices[idx] = NULL;
1597 if (rmidi->proc_entry) {
1598 snd_info_unregister(rmidi->proc_entry);
1599 rmidi->proc_entry = NULL;
1600 }
1601#ifdef CONFIG_SND_OSSEMUL
1602 if (rmidi->ossreg) {
1603 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1604 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1605#ifdef SNDRV_OSS_INFO_DEV_MIDI
1606 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1607#endif
1608 }
1609 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1610 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1611 rmidi->ossreg = 0;
1612 }
1613#endif /* CONFIG_SND_OSSEMUL */
1614 if (rmidi->ops && rmidi->ops->dev_unregister)
1615 rmidi->ops->dev_unregister(rmidi);
1616 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1617 up(&register_mutex);
1618#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1619 if (rmidi->seq_dev) {
1620 snd_device_free(rmidi->card, rmidi->seq_dev);
1621 rmidi->seq_dev = NULL;
1622 }
1623#endif
1624 return snd_rawmidi_free(rmidi);
1625}
1626
1627/**
1628 * snd_rawmidi_set_ops - set the rawmidi operators
1629 * @rmidi: the rawmidi instance
1630 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1631 * @ops: the operator table
1632 *
1633 * Sets the rawmidi operators for the given stream direction.
1634 */
48c9d417
TI		 1635void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1636 struct snd_rawmidi_ops *ops)
1da177e4
LT		 1637{
1638 struct list_head *list;
48c9d417 1639 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1640
1641 list_for_each(list, &rmidi->streams[stream].substreams) {
48c9d417 1642 substream = list_entry(list, struct snd_rawmidi_substream, list);
1da177e4
LT		 1643 substream->ops = ops;
1644 }
1645}
1646
1647/*
1648 * ENTRY functions
1649 */
1650
1651static int __init alsa_rawmidi_init(void)
1652{
1653
1654 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1655 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1656#ifdef CONFIG_SND_OSSEMUL
1657 { int i;
1658 /* check device map table */
1659 for (i = 0; i < SNDRV_CARDS; i++) {
1660 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1661 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1662 midi_map[i] = 0;
1663 }
1664 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1665 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1666 amidi_map[i] = 1;
1667 }
1668 }
1669 }
1670#endif /* CONFIG_SND_OSSEMUL */
1671 return 0;
1672}
1673
1674static void __exit alsa_rawmidi_exit(void)
1675{
1676 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1677 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1678}
1679
1680module_init(alsa_rawmidi_init)
1681module_exit(alsa_rawmidi_exit)
1682
1683EXPORT_SYMBOL(snd_rawmidi_output_params);
1684EXPORT_SYMBOL(snd_rawmidi_input_params);
1685EXPORT_SYMBOL(snd_rawmidi_drop_output);
1686EXPORT_SYMBOL(snd_rawmidi_drain_output);
1687EXPORT_SYMBOL(snd_rawmidi_drain_input);
1688EXPORT_SYMBOL(snd_rawmidi_receive);
1689EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1690EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1691EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1692EXPORT_SYMBOL(snd_rawmidi_transmit);
1693EXPORT_SYMBOL(snd_rawmidi_new);
1694EXPORT_SYMBOL(snd_rawmidi_set_ops);
1695EXPORT_SYMBOL(snd_rawmidi_info);
1696EXPORT_SYMBOL(snd_rawmidi_info_select);
1697EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1698EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1699EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1700EXPORT_SYMBOL(snd_rawmidi_kernel_write);
ubuntu-zesty-kernel mirror