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7#include <sound/core.h>
8#include <linux/major.h>
9#include <linux/init.h>
10#include <linux/sched/signal.h>
11#include <linux/slab.h>
12#include <linux/time.h>
13#include <linux/wait.h>
14#include <linux/mutex.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/mm.h>
18#include <linux/nospec.h>
19#include <sound/rawmidi.h>
20#include <sound/info.h>
21#include <sound/control.h>
22#include <sound/minors.h>
23#include <sound/initval.h>
24
25MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
26MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
27MODULE_LICENSE("GPL");
28
29#ifdef CONFIG_SND_OSSEMUL
30static int midi_map[SNDRV_CARDS];
31static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
32module_param_array(midi_map, int, NULL, 0444);
33MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
34module_param_array(amidi_map, int, NULL, 0444);
35MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
36#endif
37
38static int snd_rawmidi_free(struct snd_rawmidi *rmidi);
39static int snd_rawmidi_dev_free(struct snd_device *device);
40static int snd_rawmidi_dev_register(struct snd_device *device);
41static int snd_rawmidi_dev_disconnect(struct snd_device *device);
42
43static LIST_HEAD(snd_rawmidi_devices);
44static DEFINE_MUTEX(register_mutex);
45
46#define rmidi_err(rmidi, fmt, args...) \
47 dev_err(&(rmidi)->dev, fmt, ##args)
48#define rmidi_warn(rmidi, fmt, args...) \
49 dev_warn(&(rmidi)->dev, fmt, ##args)
50#define rmidi_dbg(rmidi, fmt, args...) \
51 dev_dbg(&(rmidi)->dev, fmt, ##args)
52
53struct snd_rawmidi_status32 {
54 s32 stream;
55 s32 tstamp_sec;
56 s32 tstamp_nsec;
57 u32 avail;
58 u32 xruns;
59 unsigned char reserved[16];
60};
61
62#define SNDRV_RAWMIDI_IOCTL_STATUS32 _IOWR('W', 0x20, struct snd_rawmidi_status32)
63
64struct snd_rawmidi_status64 {
65 int stream;
66 u8 rsvd[4];
67 s64 tstamp_sec;
68 s64 tstamp_nsec;
69 size_t avail;
70 size_t xruns;
71 unsigned char reserved[16];
72};
73
74#define SNDRV_RAWMIDI_IOCTL_STATUS64 _IOWR('W', 0x20, struct snd_rawmidi_status64)
75
76static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
77{
78 struct snd_rawmidi *rawmidi;
79
80 list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
81 if (rawmidi->card == card && rawmidi->device == device)
82 return rawmidi;
83 return NULL;
84}
85
86static inline unsigned short snd_rawmidi_file_flags(struct file *file)
87{
88 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
89 case FMODE_WRITE:
90 return SNDRV_RAWMIDI_LFLG_OUTPUT;
91 case FMODE_READ:
92 return SNDRV_RAWMIDI_LFLG_INPUT;
93 default:
94 return SNDRV_RAWMIDI_LFLG_OPEN;
95 }
96}
97
98static inline bool __snd_rawmidi_ready(struct snd_rawmidi_runtime *runtime)
99{
100 return runtime->avail >= runtime->avail_min;
101}
102
103static bool snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
104{
105 struct snd_rawmidi_runtime *runtime = substream->runtime;
106 unsigned long flags;
107 bool ready;
108
109 spin_lock_irqsave(&runtime->lock, flags);
110 ready = __snd_rawmidi_ready(runtime);
111 spin_unlock_irqrestore(&runtime->lock, flags);
112 return ready;
113}
114
115static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
116 size_t count)
117{
118 struct snd_rawmidi_runtime *runtime = substream->runtime;
119
120 return runtime->avail >= runtime->avail_min &&
121 (!substream->append || runtime->avail >= count);
122}
123
124static void snd_rawmidi_input_event_work(struct work_struct *work)
125{
126 struct snd_rawmidi_runtime *runtime =
127 container_of(work, struct snd_rawmidi_runtime, event_work);
128
129 if (runtime->event)
130 runtime->event(runtime->substream);
131}
132
133
134static inline void snd_rawmidi_buffer_ref(struct snd_rawmidi_runtime *runtime)
135{
136 runtime->buffer_ref++;
137}
138
139static inline void snd_rawmidi_buffer_unref(struct snd_rawmidi_runtime *runtime)
140{
141 runtime->buffer_ref--;
142}
143
144static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
145{
146 struct snd_rawmidi_runtime *runtime;
147
148 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
149 if (!runtime)
150 return -ENOMEM;
151 runtime->substream = substream;
152 spin_lock_init(&runtime->lock);
153 init_waitqueue_head(&runtime->sleep);
154 INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
155 runtime->event = NULL;
156 runtime->buffer_size = PAGE_SIZE;
157 runtime->avail_min = 1;
158 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
159 runtime->avail = 0;
160 else
161 runtime->avail = runtime->buffer_size;
162 runtime->buffer = kvzalloc(runtime->buffer_size, GFP_KERNEL);
163 if (!runtime->buffer) {
164 kfree(runtime);
165 return -ENOMEM;
166 }
167 runtime->appl_ptr = runtime->hw_ptr = 0;
168 substream->runtime = runtime;
169 return 0;
170}
171
172static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
173{
174 struct snd_rawmidi_runtime *runtime = substream->runtime;
175
176 kvfree(runtime->buffer);
177 kfree(runtime);
178 substream->runtime = NULL;
179 return 0;
180}
181
182static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream, int up)
183{
184 if (!substream->opened)
185 return;
186 substream->ops->trigger(substream, up);
187}
188
189static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
190{
191 if (!substream->opened)
192 return;
193 substream->ops->trigger(substream, up);
194 if (!up)
195 cancel_work_sync(&substream->runtime->event_work);
196}
197
198static void __reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime,
199 bool is_input)
200{
201 runtime->drain = 0;
202 runtime->appl_ptr = runtime->hw_ptr = 0;
203 runtime->avail = is_input ? 0 : runtime->buffer_size;
204}
205
206static void reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime,
207 bool is_input)
208{
209 unsigned long flags;
210
211 spin_lock_irqsave(&runtime->lock, flags);
212 __reset_runtime_ptrs(runtime, is_input);
213 spin_unlock_irqrestore(&runtime->lock, flags);
214}
215
216int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
217{
218 snd_rawmidi_output_trigger(substream, 0);
219 reset_runtime_ptrs(substream->runtime, false);
220 return 0;
221}
222EXPORT_SYMBOL(snd_rawmidi_drop_output);
223
224int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
225{
226 int err;
227 long timeout;
228 struct snd_rawmidi_runtime *runtime = substream->runtime;
229
230 err = 0;
231 runtime->drain = 1;
232 timeout = wait_event_interruptible_timeout(runtime->sleep,
233 (runtime->avail >= runtime->buffer_size),
234 10*HZ);
235 if (signal_pending(current))
236 err = -ERESTARTSYS;
237 if (runtime->avail < runtime->buffer_size && !timeout) {
238 rmidi_warn(substream->rmidi,
239 "rawmidi drain error (avail = %li, buffer_size = %li)\n",
240 (long)runtime->avail, (long)runtime->buffer_size);
241 err = -EIO;
242 }
243 runtime->drain = 0;
244 if (err != -ERESTARTSYS) {
245
246 if (substream->ops->drain)
247 substream->ops->drain(substream);
248 else
249 msleep(50);
250 snd_rawmidi_drop_output(substream);
251 }
252 return err;
253}
254EXPORT_SYMBOL(snd_rawmidi_drain_output);
255
256int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
257{
258 snd_rawmidi_input_trigger(substream, 0);
259 reset_runtime_ptrs(substream->runtime, true);
260 return 0;
261}
262EXPORT_SYMBOL(snd_rawmidi_drain_input);
263
264
265
266
267static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
268 int stream, int mode,
269 struct snd_rawmidi_substream **sub_ret)
270{
271 struct snd_rawmidi_substream *substream;
272 struct snd_rawmidi_str *s = &rmidi->streams[stream];
273 static const unsigned int info_flags[2] = {
274 [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
275 [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
276 };
277
278 if (!(rmidi->info_flags & info_flags[stream]))
279 return -ENXIO;
280 if (subdevice >= 0 && subdevice >= s->substream_count)
281 return -ENODEV;
282
283 list_for_each_entry(substream, &s->substreams, list) {
284 if (substream->opened) {
285 if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
286 !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
287 !substream->append)
288 continue;
289 }
290 if (subdevice < 0 || subdevice == substream->number) {
291 *sub_ret = substream;
292 return 0;
293 }
294 }
295 return -EAGAIN;
296}
297
298
299static int open_substream(struct snd_rawmidi *rmidi,
300 struct snd_rawmidi_substream *substream,
301 int mode)
302{
303 int err;
304
305 if (substream->use_count == 0) {
306 err = snd_rawmidi_runtime_create(substream);
307 if (err < 0)
308 return err;
309 err = substream->ops->open(substream);
310 if (err < 0) {
311 snd_rawmidi_runtime_free(substream);
312 return err;
313 }
314 substream->opened = 1;
315 substream->active_sensing = 0;
316 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
317 substream->append = 1;
318 substream->pid = get_pid(task_pid(current));
319 rmidi->streams[substream->stream].substream_opened++;
320 }
321 substream->use_count++;
322 return 0;
323}
324
325static void close_substream(struct snd_rawmidi *rmidi,
326 struct snd_rawmidi_substream *substream,
327 int cleanup);
328
329static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
330 struct snd_rawmidi_file *rfile)
331{
332 struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
333 int err;
334
335 rfile->input = rfile->output = NULL;
336 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
337 err = assign_substream(rmidi, subdevice,
338 SNDRV_RAWMIDI_STREAM_INPUT,
339 mode, &sinput);
340 if (err < 0)
341 return err;
342 }
343 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
344 err = assign_substream(rmidi, subdevice,
345 SNDRV_RAWMIDI_STREAM_OUTPUT,
346 mode, &soutput);
347 if (err < 0)
348 return err;
349 }
350
351 if (sinput) {
352 err = open_substream(rmidi, sinput, mode);
353 if (err < 0)
354 return err;
355 }
356 if (soutput) {
357 err = open_substream(rmidi, soutput, mode);
358 if (err < 0) {
359 if (sinput)
360 close_substream(rmidi, sinput, 0);
361 return err;
362 }
363 }
364
365 rfile->rmidi = rmidi;
366 rfile->input = sinput;
367 rfile->output = soutput;
368 return 0;
369}
370
371
372int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
373 int mode, struct snd_rawmidi_file *rfile)
374{
375 struct snd_rawmidi *rmidi;
376 int err = 0;
377
378 if (snd_BUG_ON(!rfile))
379 return -EINVAL;
380
381 mutex_lock(®ister_mutex);
382 rmidi = snd_rawmidi_search(card, device);
383 if (!rmidi)
384 err = -ENODEV;
385 else if (!try_module_get(rmidi->card->module))
386 err = -ENXIO;
387 mutex_unlock(®ister_mutex);
388 if (err < 0)
389 return err;
390
391 mutex_lock(&rmidi->open_mutex);
392 err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
393 mutex_unlock(&rmidi->open_mutex);
394 if (err < 0)
395 module_put(rmidi->card->module);
396 return err;
397}
398EXPORT_SYMBOL(snd_rawmidi_kernel_open);
399
400static int snd_rawmidi_open(struct inode *inode, struct file *file)
401{
402 int maj = imajor(inode);
403 struct snd_card *card;
404 int subdevice;
405 unsigned short fflags;
406 int err;
407 struct snd_rawmidi *rmidi;
408 struct snd_rawmidi_file *rawmidi_file = NULL;
409 wait_queue_entry_t wait;
410
411 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
412 return -EINVAL;
413
414 err = stream_open(inode, file);
415 if (err < 0)
416 return err;
417
418 if (maj == snd_major) {
419 rmidi = snd_lookup_minor_data(iminor(inode),
420 SNDRV_DEVICE_TYPE_RAWMIDI);
421#ifdef CONFIG_SND_OSSEMUL
422 } else if (maj == SOUND_MAJOR) {
423 rmidi = snd_lookup_oss_minor_data(iminor(inode),
424 SNDRV_OSS_DEVICE_TYPE_MIDI);
425#endif
426 } else
427 return -ENXIO;
428
429 if (rmidi == NULL)
430 return -ENODEV;
431
432 if (!try_module_get(rmidi->card->module)) {
433 snd_card_unref(rmidi->card);
434 return -ENXIO;
435 }
436
437 mutex_lock(&rmidi->open_mutex);
438 card = rmidi->card;
439 err = snd_card_file_add(card, file);
440 if (err < 0)
441 goto __error_card;
442 fflags = snd_rawmidi_file_flags(file);
443 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR)
444 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
445 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
446 if (rawmidi_file == NULL) {
447 err = -ENOMEM;
448 goto __error;
449 }
450 init_waitqueue_entry(&wait, current);
451 add_wait_queue(&rmidi->open_wait, &wait);
452 while (1) {
453 subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI);
454 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
455 if (err >= 0)
456 break;
457 if (err == -EAGAIN) {
458 if (file->f_flags & O_NONBLOCK) {
459 err = -EBUSY;
460 break;
461 }
462 } else
463 break;
464 set_current_state(TASK_INTERRUPTIBLE);
465 mutex_unlock(&rmidi->open_mutex);
466 schedule();
467 mutex_lock(&rmidi->open_mutex);
468 if (rmidi->card->shutdown) {
469 err = -ENODEV;
470 break;
471 }
472 if (signal_pending(current)) {
473 err = -ERESTARTSYS;
474 break;
475 }
476 }
477 remove_wait_queue(&rmidi->open_wait, &wait);
478 if (err < 0) {
479 kfree(rawmidi_file);
480 goto __error;
481 }
482#ifdef CONFIG_SND_OSSEMUL
483 if (rawmidi_file->input && rawmidi_file->input->runtime)
484 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
485 if (rawmidi_file->output && rawmidi_file->output->runtime)
486 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
487#endif
488 file->private_data = rawmidi_file;
489 mutex_unlock(&rmidi->open_mutex);
490 snd_card_unref(rmidi->card);
491 return 0;
492
493 __error:
494 snd_card_file_remove(card, file);
495 __error_card:
496 mutex_unlock(&rmidi->open_mutex);
497 module_put(rmidi->card->module);
498 snd_card_unref(rmidi->card);
499 return err;
500}
501
502static void close_substream(struct snd_rawmidi *rmidi,
503 struct snd_rawmidi_substream *substream,
504 int cleanup)
505{
506 if (--substream->use_count)
507 return;
508
509 if (cleanup) {
510 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
511 snd_rawmidi_input_trigger(substream, 0);
512 else {
513 if (substream->active_sensing) {
514 unsigned char buf = 0xfe;
515
516
517
518 snd_rawmidi_kernel_write(substream, &buf, 1);
519 }
520 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
521 snd_rawmidi_output_trigger(substream, 0);
522 }
523 }
524 substream->ops->close(substream);
525 if (substream->runtime->private_free)
526 substream->runtime->private_free(substream);
527 snd_rawmidi_runtime_free(substream);
528 substream->opened = 0;
529 substream->append = 0;
530 put_pid(substream->pid);
531 substream->pid = NULL;
532 rmidi->streams[substream->stream].substream_opened--;
533}
534
535static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
536{
537 struct snd_rawmidi *rmidi;
538
539 rmidi = rfile->rmidi;
540 mutex_lock(&rmidi->open_mutex);
541 if (rfile->input) {
542 close_substream(rmidi, rfile->input, 1);
543 rfile->input = NULL;
544 }
545 if (rfile->output) {
546 close_substream(rmidi, rfile->output, 1);
547 rfile->output = NULL;
548 }
549 rfile->rmidi = NULL;
550 mutex_unlock(&rmidi->open_mutex);
551 wake_up(&rmidi->open_wait);
552}
553
554
555int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
556{
557 struct snd_rawmidi *rmidi;
558
559 if (snd_BUG_ON(!rfile))
560 return -ENXIO;
561
562 rmidi = rfile->rmidi;
563 rawmidi_release_priv(rfile);
564 module_put(rmidi->card->module);
565 return 0;
566}
567EXPORT_SYMBOL(snd_rawmidi_kernel_release);
568
569static int snd_rawmidi_release(struct inode *inode, struct file *file)
570{
571 struct snd_rawmidi_file *rfile;
572 struct snd_rawmidi *rmidi;
573 struct module *module;
574
575 rfile = file->private_data;
576 rmidi = rfile->rmidi;
577 rawmidi_release_priv(rfile);
578 kfree(rfile);
579 module = rmidi->card->module;
580 snd_card_file_remove(rmidi->card, file);
581 module_put(module);
582 return 0;
583}
584
585static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
586 struct snd_rawmidi_info *info)
587{
588 struct snd_rawmidi *rmidi;
589
590 if (substream == NULL)
591 return -ENODEV;
592 rmidi = substream->rmidi;
593 memset(info, 0, sizeof(*info));
594 info->card = rmidi->card->number;
595 info->device = rmidi->device;
596 info->subdevice = substream->number;
597 info->stream = substream->stream;
598 info->flags = rmidi->info_flags;
599 strcpy(info->id, rmidi->id);
600 strcpy(info->name, rmidi->name);
601 strcpy(info->subname, substream->name);
602 info->subdevices_count = substream->pstr->substream_count;
603 info->subdevices_avail = (substream->pstr->substream_count -
604 substream->pstr->substream_opened);
605 return 0;
606}
607
608static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
609 struct snd_rawmidi_info __user *_info)
610{
611 struct snd_rawmidi_info info;
612 int err;
613
614 err = snd_rawmidi_info(substream, &info);
615 if (err < 0)
616 return err;
617 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
618 return -EFAULT;
619 return 0;
620}
621
622static int __snd_rawmidi_info_select(struct snd_card *card,
623 struct snd_rawmidi_info *info)
624{
625 struct snd_rawmidi *rmidi;
626 struct snd_rawmidi_str *pstr;
627 struct snd_rawmidi_substream *substream;
628
629 rmidi = snd_rawmidi_search(card, info->device);
630 if (!rmidi)
631 return -ENXIO;
632 if (info->stream < 0 || info->stream > 1)
633 return -EINVAL;
634 info->stream = array_index_nospec(info->stream, 2);
635 pstr = &rmidi->streams[info->stream];
636 if (pstr->substream_count == 0)
637 return -ENOENT;
638 if (info->subdevice >= pstr->substream_count)
639 return -ENXIO;
640 list_for_each_entry(substream, &pstr->substreams, list) {
641 if ((unsigned int)substream->number == info->subdevice)
642 return snd_rawmidi_info(substream, info);
643 }
644 return -ENXIO;
645}
646
647int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
648{
649 int ret;
650
651 mutex_lock(®ister_mutex);
652 ret = __snd_rawmidi_info_select(card, info);
653 mutex_unlock(®ister_mutex);
654 return ret;
655}
656EXPORT_SYMBOL(snd_rawmidi_info_select);
657
658static int snd_rawmidi_info_select_user(struct snd_card *card,
659 struct snd_rawmidi_info __user *_info)
660{
661 int err;
662 struct snd_rawmidi_info info;
663
664 if (get_user(info.device, &_info->device))
665 return -EFAULT;
666 if (get_user(info.stream, &_info->stream))
667 return -EFAULT;
668 if (get_user(info.subdevice, &_info->subdevice))
669 return -EFAULT;
670 err = snd_rawmidi_info_select(card, &info);
671 if (err < 0)
672 return err;
673 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
674 return -EFAULT;
675 return 0;
676}
677
678static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime,
679 struct snd_rawmidi_params *params,
680 bool is_input)
681{
682 char *newbuf, *oldbuf;
683 unsigned int framing = params->mode & SNDRV_RAWMIDI_MODE_FRAMING_MASK;
684
685 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L)
686 return -EINVAL;
687 if (framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP && (params->buffer_size & 0x1f) != 0)
688 return -EINVAL;
689 if (params->avail_min < 1 || params->avail_min > params->buffer_size)
690 return -EINVAL;
691 if (params->buffer_size != runtime->buffer_size) {
692 newbuf = kvzalloc(params->buffer_size, GFP_KERNEL);
693 if (!newbuf)
694 return -ENOMEM;
695 spin_lock_irq(&runtime->lock);
696 if (runtime->buffer_ref) {
697 spin_unlock_irq(&runtime->lock);
698 kvfree(newbuf);
699 return -EBUSY;
700 }
701 oldbuf = runtime->buffer;
702 runtime->buffer = newbuf;
703 runtime->buffer_size = params->buffer_size;
704 __reset_runtime_ptrs(runtime, is_input);
705 spin_unlock_irq(&runtime->lock);
706 kvfree(oldbuf);
707 }
708 runtime->avail_min = params->avail_min;
709 return 0;
710}
711
712int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
713 struct snd_rawmidi_params *params)
714{
715 if (substream->append && substream->use_count > 1)
716 return -EBUSY;
717 snd_rawmidi_drain_output(substream);
718 substream->active_sensing = !params->no_active_sensing;
719 return resize_runtime_buffer(substream->runtime, params, false);
720}
721EXPORT_SYMBOL(snd_rawmidi_output_params);
722
723int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
724 struct snd_rawmidi_params *params)
725{
726 unsigned int framing = params->mode & SNDRV_RAWMIDI_MODE_FRAMING_MASK;
727 unsigned int clock_type = params->mode & SNDRV_RAWMIDI_MODE_CLOCK_MASK;
728 int err;
729
730 if (framing == SNDRV_RAWMIDI_MODE_FRAMING_NONE && clock_type != SNDRV_RAWMIDI_MODE_CLOCK_NONE)
731 return -EINVAL;
732 else if (clock_type > SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC_RAW)
733 return -EINVAL;
734 if (framing > SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP)
735 return -EINVAL;
736 snd_rawmidi_drain_input(substream);
737 err = resize_runtime_buffer(substream->runtime, params, true);
738 if (err < 0)
739 return err;
740
741 substream->framing = framing;
742 substream->clock_type = clock_type;
743 return 0;
744}
745EXPORT_SYMBOL(snd_rawmidi_input_params);
746
747static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
748 struct snd_rawmidi_status64 *status)
749{
750 struct snd_rawmidi_runtime *runtime = substream->runtime;
751
752 memset(status, 0, sizeof(*status));
753 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
754 spin_lock_irq(&runtime->lock);
755 status->avail = runtime->avail;
756 spin_unlock_irq(&runtime->lock);
757 return 0;
758}
759
760static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
761 struct snd_rawmidi_status64 *status)
762{
763 struct snd_rawmidi_runtime *runtime = substream->runtime;
764
765 memset(status, 0, sizeof(*status));
766 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
767 spin_lock_irq(&runtime->lock);
768 status->avail = runtime->avail;
769 status->xruns = runtime->xruns;
770 runtime->xruns = 0;
771 spin_unlock_irq(&runtime->lock);
772 return 0;
773}
774
775static int snd_rawmidi_ioctl_status32(struct snd_rawmidi_file *rfile,
776 struct snd_rawmidi_status32 __user *argp)
777{
778 int err = 0;
779 struct snd_rawmidi_status32 __user *status = argp;
780 struct snd_rawmidi_status32 status32;
781 struct snd_rawmidi_status64 status64;
782
783 if (copy_from_user(&status32, argp,
784 sizeof(struct snd_rawmidi_status32)))
785 return -EFAULT;
786
787 switch (status32.stream) {
788 case SNDRV_RAWMIDI_STREAM_OUTPUT:
789 if (rfile->output == NULL)
790 return -EINVAL;
791 err = snd_rawmidi_output_status(rfile->output, &status64);
792 break;
793 case SNDRV_RAWMIDI_STREAM_INPUT:
794 if (rfile->input == NULL)
795 return -EINVAL;
796 err = snd_rawmidi_input_status(rfile->input, &status64);
797 break;
798 default:
799 return -EINVAL;
800 }
801 if (err < 0)
802 return err;
803
804 status32 = (struct snd_rawmidi_status32) {
805 .stream = status64.stream,
806 .tstamp_sec = status64.tstamp_sec,
807 .tstamp_nsec = status64.tstamp_nsec,
808 .avail = status64.avail,
809 .xruns = status64.xruns,
810 };
811
812 if (copy_to_user(status, &status32, sizeof(*status)))
813 return -EFAULT;
814
815 return 0;
816}
817
818static int snd_rawmidi_ioctl_status64(struct snd_rawmidi_file *rfile,
819 struct snd_rawmidi_status64 __user *argp)
820{
821 int err = 0;
822 struct snd_rawmidi_status64 status;
823
824 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status64)))
825 return -EFAULT;
826
827 switch (status.stream) {
828 case SNDRV_RAWMIDI_STREAM_OUTPUT:
829 if (rfile->output == NULL)
830 return -EINVAL;
831 err = snd_rawmidi_output_status(rfile->output, &status);
832 break;
833 case SNDRV_RAWMIDI_STREAM_INPUT:
834 if (rfile->input == NULL)
835 return -EINVAL;
836 err = snd_rawmidi_input_status(rfile->input, &status);
837 break;
838 default:
839 return -EINVAL;
840 }
841 if (err < 0)
842 return err;
843 if (copy_to_user(argp, &status,
844 sizeof(struct snd_rawmidi_status64)))
845 return -EFAULT;
846 return 0;
847}
848
849static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
850{
851 struct snd_rawmidi_file *rfile;
852 void __user *argp = (void __user *)arg;
853
854 rfile = file->private_data;
855 if (((cmd >> 8) & 0xff) != 'W')
856 return -ENOTTY;
857 switch (cmd) {
858 case SNDRV_RAWMIDI_IOCTL_PVERSION:
859 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
860 case SNDRV_RAWMIDI_IOCTL_INFO:
861 {
862 int stream;
863 struct snd_rawmidi_info __user *info = argp;
864
865 if (get_user(stream, &info->stream))
866 return -EFAULT;
867 switch (stream) {
868 case SNDRV_RAWMIDI_STREAM_INPUT:
869 return snd_rawmidi_info_user(rfile->input, info);
870 case SNDRV_RAWMIDI_STREAM_OUTPUT:
871 return snd_rawmidi_info_user(rfile->output, info);
872 default:
873 return -EINVAL;
874 }
875 }
876 case SNDRV_RAWMIDI_IOCTL_PARAMS:
877 {
878 struct snd_rawmidi_params params;
879
880 if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params)))
881 return -EFAULT;
882 switch (params.stream) {
883 case SNDRV_RAWMIDI_STREAM_OUTPUT:
884 if (rfile->output == NULL)
885 return -EINVAL;
886 return snd_rawmidi_output_params(rfile->output, ¶ms);
887 case SNDRV_RAWMIDI_STREAM_INPUT:
888 if (rfile->input == NULL)
889 return -EINVAL;
890 return snd_rawmidi_input_params(rfile->input, ¶ms);
891 default:
892 return -EINVAL;
893 }
894 }
895 case SNDRV_RAWMIDI_IOCTL_STATUS32:
896 return snd_rawmidi_ioctl_status32(rfile, argp);
897 case SNDRV_RAWMIDI_IOCTL_STATUS64:
898 return snd_rawmidi_ioctl_status64(rfile, argp);
899 case SNDRV_RAWMIDI_IOCTL_DROP:
900 {
901 int val;
902
903 if (get_user(val, (int __user *) argp))
904 return -EFAULT;
905 switch (val) {
906 case SNDRV_RAWMIDI_STREAM_OUTPUT:
907 if (rfile->output == NULL)
908 return -EINVAL;
909 return snd_rawmidi_drop_output(rfile->output);
910 default:
911 return -EINVAL;
912 }
913 }
914 case SNDRV_RAWMIDI_IOCTL_DRAIN:
915 {
916 int val;
917
918 if (get_user(val, (int __user *) argp))
919 return -EFAULT;
920 switch (val) {
921 case SNDRV_RAWMIDI_STREAM_OUTPUT:
922 if (rfile->output == NULL)
923 return -EINVAL;
924 return snd_rawmidi_drain_output(rfile->output);
925 case SNDRV_RAWMIDI_STREAM_INPUT:
926 if (rfile->input == NULL)
927 return -EINVAL;
928 return snd_rawmidi_drain_input(rfile->input);
929 default:
930 return -EINVAL;
931 }
932 }
933 default:
934 rmidi_dbg(rfile->rmidi,
935 "rawmidi: unknown command = 0x%x\n", cmd);
936 }
937 return -ENOTTY;
938}
939
940static int snd_rawmidi_control_ioctl(struct snd_card *card,
941 struct snd_ctl_file *control,
942 unsigned int cmd,
943 unsigned long arg)
944{
945 void __user *argp = (void __user *)arg;
946
947 switch (cmd) {
948 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
949 {
950 int device;
951
952 if (get_user(device, (int __user *)argp))
953 return -EFAULT;
954 if (device >= SNDRV_RAWMIDI_DEVICES)
955 device = SNDRV_RAWMIDI_DEVICES - 1;
956 mutex_lock(®ister_mutex);
957 device = device < 0 ? 0 : device + 1;
958 while (device < SNDRV_RAWMIDI_DEVICES) {
959 if (snd_rawmidi_search(card, device))
960 break;
961 device++;
962 }
963 if (device == SNDRV_RAWMIDI_DEVICES)
964 device = -1;
965 mutex_unlock(®ister_mutex);
966 if (put_user(device, (int __user *)argp))
967 return -EFAULT;
968 return 0;
969 }
970 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
971 {
972 int val;
973
974 if (get_user(val, (int __user *)argp))
975 return -EFAULT;
976 control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val;
977 return 0;
978 }
979 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
980 return snd_rawmidi_info_select_user(card, argp);
981 }
982 return -ENOIOCTLCMD;
983}
984
985static int receive_with_tstamp_framing(struct snd_rawmidi_substream *substream,
986 const unsigned char *buffer, int src_count, const struct timespec64 *tstamp)
987{
988 struct snd_rawmidi_runtime *runtime = substream->runtime;
989 struct snd_rawmidi_framing_tstamp *dest_ptr;
990 struct snd_rawmidi_framing_tstamp frame = { .tv_sec = tstamp->tv_sec, .tv_nsec = tstamp->tv_nsec };
991 int dest_frames = 0;
992 int orig_count = src_count;
993 int frame_size = sizeof(struct snd_rawmidi_framing_tstamp);
994
995 BUILD_BUG_ON(frame_size != 0x20);
996 if (snd_BUG_ON((runtime->hw_ptr & 0x1f) != 0))
997 return -EINVAL;
998
999 while (src_count > 0) {
1000 if ((int)(runtime->buffer_size - runtime->avail) < frame_size) {
1001 runtime->xruns += src_count;
1002 break;
1003 }
1004 if (src_count >= SNDRV_RAWMIDI_FRAMING_DATA_LENGTH)
1005 frame.length = SNDRV_RAWMIDI_FRAMING_DATA_LENGTH;
1006 else {
1007 frame.length = src_count;
1008 memset(frame.data, 0, SNDRV_RAWMIDI_FRAMING_DATA_LENGTH);
1009 }
1010 memcpy(frame.data, buffer, frame.length);
1011 buffer += frame.length;
1012 src_count -= frame.length;
1013 dest_ptr = (struct snd_rawmidi_framing_tstamp *) (runtime->buffer + runtime->hw_ptr);
1014 *dest_ptr = frame;
1015 runtime->avail += frame_size;
1016 runtime->hw_ptr += frame_size;
1017 runtime->hw_ptr %= runtime->buffer_size;
1018 dest_frames++;
1019 }
1020 return orig_count - src_count;
1021}
1022
1023static struct timespec64 get_framing_tstamp(struct snd_rawmidi_substream *substream)
1024{
1025 struct timespec64 ts64 = {0, 0};
1026
1027 switch (substream->clock_type) {
1028 case SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC_RAW:
1029 ktime_get_raw_ts64(&ts64);
1030 break;
1031 case SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC:
1032 ktime_get_ts64(&ts64);
1033 break;
1034 case SNDRV_RAWMIDI_MODE_CLOCK_REALTIME:
1035 ktime_get_real_ts64(&ts64);
1036 break;
1037 }
1038 return ts64;
1039}
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
1052 const unsigned char *buffer, int count)
1053{
1054 unsigned long flags;
1055 struct timespec64 ts64 = get_framing_tstamp(substream);
1056 int result = 0, count1;
1057 struct snd_rawmidi_runtime *runtime = substream->runtime;
1058
1059 if (!substream->opened)
1060 return -EBADFD;
1061 if (runtime->buffer == NULL) {
1062 rmidi_dbg(substream->rmidi,
1063 "snd_rawmidi_receive: input is not active!!!\n");
1064 return -EINVAL;
1065 }
1066
1067 spin_lock_irqsave(&runtime->lock, flags);
1068 if (substream->framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP) {
1069 result = receive_with_tstamp_framing(substream, buffer, count, &ts64);
1070 } else if (count == 1) {
1071 substream->bytes++;
1072 if (runtime->avail < runtime->buffer_size) {
1073 runtime->buffer[runtime->hw_ptr++] = buffer[0];
1074 runtime->hw_ptr %= runtime->buffer_size;
1075 runtime->avail++;
1076 result++;
1077 } else {
1078 runtime->xruns++;
1079 }
1080 } else {
1081 substream->bytes += count;
1082 count1 = runtime->buffer_size - runtime->hw_ptr;
1083 if (count1 > count)
1084 count1 = count;
1085 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1086 count1 = runtime->buffer_size - runtime->avail;
1087 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
1088 runtime->hw_ptr += count1;
1089 runtime->hw_ptr %= runtime->buffer_size;
1090 runtime->avail += count1;
1091 count -= count1;
1092 result += count1;
1093 if (count > 0) {
1094 buffer += count1;
1095 count1 = count;
1096 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
1097 count1 = runtime->buffer_size - runtime->avail;
1098 runtime->xruns += count - count1;
1099 }
1100 if (count1 > 0) {
1101 memcpy(runtime->buffer, buffer, count1);
1102 runtime->hw_ptr = count1;
1103 runtime->avail += count1;
1104 result += count1;
1105 }
1106 }
1107 }
1108 if (result > 0) {
1109 if (runtime->event)
1110 schedule_work(&runtime->event_work);
1111 else if (__snd_rawmidi_ready(runtime))
1112 wake_up(&runtime->sleep);
1113 }
1114 spin_unlock_irqrestore(&runtime->lock, flags);
1115 return result;
1116}
1117EXPORT_SYMBOL(snd_rawmidi_receive);
1118
1119static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
1120 unsigned char __user *userbuf,
1121 unsigned char *kernelbuf, long count)
1122{
1123 unsigned long flags;
1124 long result = 0, count1;
1125 struct snd_rawmidi_runtime *runtime = substream->runtime;
1126 unsigned long appl_ptr;
1127 int err = 0;
1128
1129 spin_lock_irqsave(&runtime->lock, flags);
1130 snd_rawmidi_buffer_ref(runtime);
1131 while (count > 0 && runtime->avail) {
1132 count1 = runtime->buffer_size - runtime->appl_ptr;
1133 if (count1 > count)
1134 count1 = count;
1135 if (count1 > (int)runtime->avail)
1136 count1 = runtime->avail;
1137
1138
1139 appl_ptr = runtime->appl_ptr;
1140 runtime->appl_ptr += count1;
1141 runtime->appl_ptr %= runtime->buffer_size;
1142 runtime->avail -= count1;
1143
1144 if (kernelbuf)
1145 memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1);
1146 if (userbuf) {
1147 spin_unlock_irqrestore(&runtime->lock, flags);
1148 if (copy_to_user(userbuf + result,
1149 runtime->buffer + appl_ptr, count1))
1150 err = -EFAULT;
1151 spin_lock_irqsave(&runtime->lock, flags);
1152 if (err)
1153 goto out;
1154 }
1155 result += count1;
1156 count -= count1;
1157 }
1158 out:
1159 snd_rawmidi_buffer_unref(runtime);
1160 spin_unlock_irqrestore(&runtime->lock, flags);
1161 return result > 0 ? result : err;
1162}
1163
1164long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
1165 unsigned char *buf, long count)
1166{
1167 snd_rawmidi_input_trigger(substream, 1);
1168 return snd_rawmidi_kernel_read1(substream, NULL, buf, count);
1169}
1170EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1171
1172static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
1173 loff_t *offset)
1174{
1175 long result;
1176 int count1;
1177 struct snd_rawmidi_file *rfile;
1178 struct snd_rawmidi_substream *substream;
1179 struct snd_rawmidi_runtime *runtime;
1180
1181 rfile = file->private_data;
1182 substream = rfile->input;
1183 if (substream == NULL)
1184 return -EIO;
1185 runtime = substream->runtime;
1186 snd_rawmidi_input_trigger(substream, 1);
1187 result = 0;
1188 while (count > 0) {
1189 spin_lock_irq(&runtime->lock);
1190 while (!__snd_rawmidi_ready(runtime)) {
1191 wait_queue_entry_t wait;
1192
1193 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1194 spin_unlock_irq(&runtime->lock);
1195 return result > 0 ? result : -EAGAIN;
1196 }
1197 init_waitqueue_entry(&wait, current);
1198 add_wait_queue(&runtime->sleep, &wait);
1199 set_current_state(TASK_INTERRUPTIBLE);
1200 spin_unlock_irq(&runtime->lock);
1201 schedule();
1202 remove_wait_queue(&runtime->sleep, &wait);
1203 if (rfile->rmidi->card->shutdown)
1204 return -ENODEV;
1205 if (signal_pending(current))
1206 return result > 0 ? result : -ERESTARTSYS;
1207 spin_lock_irq(&runtime->lock);
1208 if (!runtime->avail) {
1209 spin_unlock_irq(&runtime->lock);
1210 return result > 0 ? result : -EIO;
1211 }
1212 }
1213 spin_unlock_irq(&runtime->lock);
1214 count1 = snd_rawmidi_kernel_read1(substream,
1215 (unsigned char __user *)buf,
1216 NULL,
1217 count);
1218 if (count1 < 0)
1219 return result > 0 ? result : count1;
1220 result += count1;
1221 buf += count1;
1222 count -= count1;
1223 }
1224 return result;
1225}
1226
1227
1228
1229
1230
1231
1232
1233int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1234{
1235 struct snd_rawmidi_runtime *runtime = substream->runtime;
1236 int result;
1237 unsigned long flags;
1238
1239 if (runtime->buffer == NULL) {
1240 rmidi_dbg(substream->rmidi,
1241 "snd_rawmidi_transmit_empty: output is not active!!!\n");
1242 return 1;
1243 }
1244 spin_lock_irqsave(&runtime->lock, flags);
1245 result = runtime->avail >= runtime->buffer_size;
1246 spin_unlock_irqrestore(&runtime->lock, flags);
1247 return result;
1248}
1249EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1260 unsigned char *buffer, int count)
1261{
1262 int result, count1;
1263 struct snd_rawmidi_runtime *runtime = substream->runtime;
1264
1265 if (runtime->buffer == NULL) {
1266 rmidi_dbg(substream->rmidi,
1267 "snd_rawmidi_transmit_peek: output is not active!!!\n");
1268 return -EINVAL;
1269 }
1270 result = 0;
1271 if (runtime->avail >= runtime->buffer_size) {
1272
1273 goto __skip;
1274 }
1275 if (count == 1) {
1276 *buffer = runtime->buffer[runtime->hw_ptr];
1277 result++;
1278 } else {
1279 count1 = runtime->buffer_size - runtime->hw_ptr;
1280 if (count1 > count)
1281 count1 = count;
1282 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1283 count1 = runtime->buffer_size - runtime->avail;
1284 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1285 count -= count1;
1286 result += count1;
1287 if (count > 0) {
1288 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1289 count = runtime->buffer_size - runtime->avail - count1;
1290 memcpy(buffer + count1, runtime->buffer, count);
1291 result += count;
1292 }
1293 }
1294 __skip:
1295 return result;
1296}
1297EXPORT_SYMBOL(__snd_rawmidi_transmit_peek);
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1314 unsigned char *buffer, int count)
1315{
1316 struct snd_rawmidi_runtime *runtime = substream->runtime;
1317 int result;
1318 unsigned long flags;
1319
1320 spin_lock_irqsave(&runtime->lock, flags);
1321 result = __snd_rawmidi_transmit_peek(substream, buffer, count);
1322 spin_unlock_irqrestore(&runtime->lock, flags);
1323 return result;
1324}
1325EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1326
1327
1328
1329
1330
1331
1332
1333
1334int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1335{
1336 struct snd_rawmidi_runtime *runtime = substream->runtime;
1337
1338 if (runtime->buffer == NULL) {
1339 rmidi_dbg(substream->rmidi,
1340 "snd_rawmidi_transmit_ack: output is not active!!!\n");
1341 return -EINVAL;
1342 }
1343 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1344 runtime->hw_ptr += count;
1345 runtime->hw_ptr %= runtime->buffer_size;
1346 runtime->avail += count;
1347 substream->bytes += count;
1348 if (count > 0) {
1349 if (runtime->drain || __snd_rawmidi_ready(runtime))
1350 wake_up(&runtime->sleep);
1351 }
1352 return count;
1353}
1354EXPORT_SYMBOL(__snd_rawmidi_transmit_ack);
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1368{
1369 struct snd_rawmidi_runtime *runtime = substream->runtime;
1370 int result;
1371 unsigned long flags;
1372
1373 spin_lock_irqsave(&runtime->lock, flags);
1374 result = __snd_rawmidi_transmit_ack(substream, count);
1375 spin_unlock_irqrestore(&runtime->lock, flags);
1376 return result;
1377}
1378EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1391 unsigned char *buffer, int count)
1392{
1393 struct snd_rawmidi_runtime *runtime = substream->runtime;
1394 int result;
1395 unsigned long flags;
1396
1397 spin_lock_irqsave(&runtime->lock, flags);
1398 if (!substream->opened)
1399 result = -EBADFD;
1400 else {
1401 count = __snd_rawmidi_transmit_peek(substream, buffer, count);
1402 if (count <= 0)
1403 result = count;
1404 else
1405 result = __snd_rawmidi_transmit_ack(substream, count);
1406 }
1407 spin_unlock_irqrestore(&runtime->lock, flags);
1408 return result;
1409}
1410EXPORT_SYMBOL(snd_rawmidi_transmit);
1411
1412
1413
1414
1415
1416
1417
1418int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream)
1419{
1420 struct snd_rawmidi_runtime *runtime = substream->runtime;
1421 unsigned long flags;
1422 int count = 0;
1423
1424 spin_lock_irqsave(&runtime->lock, flags);
1425 if (runtime->avail < runtime->buffer_size) {
1426 count = runtime->buffer_size - runtime->avail;
1427 __snd_rawmidi_transmit_ack(substream, count);
1428 }
1429 spin_unlock_irqrestore(&runtime->lock, flags);
1430 return count;
1431}
1432EXPORT_SYMBOL(snd_rawmidi_proceed);
1433
1434static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1435 const unsigned char __user *userbuf,
1436 const unsigned char *kernelbuf,
1437 long count)
1438{
1439 unsigned long flags;
1440 long count1, result;
1441 struct snd_rawmidi_runtime *runtime = substream->runtime;
1442 unsigned long appl_ptr;
1443
1444 if (!kernelbuf && !userbuf)
1445 return -EINVAL;
1446 if (snd_BUG_ON(!runtime->buffer))
1447 return -EINVAL;
1448
1449 result = 0;
1450 spin_lock_irqsave(&runtime->lock, flags);
1451 if (substream->append) {
1452 if ((long)runtime->avail < count) {
1453 spin_unlock_irqrestore(&runtime->lock, flags);
1454 return -EAGAIN;
1455 }
1456 }
1457 snd_rawmidi_buffer_ref(runtime);
1458 while (count > 0 && runtime->avail > 0) {
1459 count1 = runtime->buffer_size - runtime->appl_ptr;
1460 if (count1 > count)
1461 count1 = count;
1462 if (count1 > (long)runtime->avail)
1463 count1 = runtime->avail;
1464
1465
1466 appl_ptr = runtime->appl_ptr;
1467 runtime->appl_ptr += count1;
1468 runtime->appl_ptr %= runtime->buffer_size;
1469 runtime->avail -= count1;
1470
1471 if (kernelbuf)
1472 memcpy(runtime->buffer + appl_ptr,
1473 kernelbuf + result, count1);
1474 else if (userbuf) {
1475 spin_unlock_irqrestore(&runtime->lock, flags);
1476 if (copy_from_user(runtime->buffer + appl_ptr,
1477 userbuf + result, count1)) {
1478 spin_lock_irqsave(&runtime->lock, flags);
1479 result = result > 0 ? result : -EFAULT;
1480 goto __end;
1481 }
1482 spin_lock_irqsave(&runtime->lock, flags);
1483 }
1484 result += count1;
1485 count -= count1;
1486 }
1487 __end:
1488 count1 = runtime->avail < runtime->buffer_size;
1489 snd_rawmidi_buffer_unref(runtime);
1490 spin_unlock_irqrestore(&runtime->lock, flags);
1491 if (count1)
1492 snd_rawmidi_output_trigger(substream, 1);
1493 return result;
1494}
1495
1496long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1497 const unsigned char *buf, long count)
1498{
1499 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1500}
1501EXPORT_SYMBOL(snd_rawmidi_kernel_write);
1502
1503static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1504 size_t count, loff_t *offset)
1505{
1506 long result, timeout;
1507 int count1;
1508 struct snd_rawmidi_file *rfile;
1509 struct snd_rawmidi_runtime *runtime;
1510 struct snd_rawmidi_substream *substream;
1511
1512 rfile = file->private_data;
1513 substream = rfile->output;
1514 runtime = substream->runtime;
1515
1516 if (substream->append && count > runtime->buffer_size)
1517 return -EIO;
1518 result = 0;
1519 while (count > 0) {
1520 spin_lock_irq(&runtime->lock);
1521 while (!snd_rawmidi_ready_append(substream, count)) {
1522 wait_queue_entry_t wait;
1523
1524 if (file->f_flags & O_NONBLOCK) {
1525 spin_unlock_irq(&runtime->lock);
1526 return result > 0 ? result : -EAGAIN;
1527 }
1528 init_waitqueue_entry(&wait, current);
1529 add_wait_queue(&runtime->sleep, &wait);
1530 set_current_state(TASK_INTERRUPTIBLE);
1531 spin_unlock_irq(&runtime->lock);
1532 timeout = schedule_timeout(30 * HZ);
1533 remove_wait_queue(&runtime->sleep, &wait);
1534 if (rfile->rmidi->card->shutdown)
1535 return -ENODEV;
1536 if (signal_pending(current))
1537 return result > 0 ? result : -ERESTARTSYS;
1538 spin_lock_irq(&runtime->lock);
1539 if (!runtime->avail && !timeout) {
1540 spin_unlock_irq(&runtime->lock);
1541 return result > 0 ? result : -EIO;
1542 }
1543 }
1544 spin_unlock_irq(&runtime->lock);
1545 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1546 if (count1 < 0)
1547 return result > 0 ? result : count1;
1548 result += count1;
1549 buf += count1;
1550 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1551 break;
1552 count -= count1;
1553 }
1554 if (file->f_flags & O_DSYNC) {
1555 spin_lock_irq(&runtime->lock);
1556 while (runtime->avail != runtime->buffer_size) {
1557 wait_queue_entry_t wait;
1558 unsigned int last_avail = runtime->avail;
1559
1560 init_waitqueue_entry(&wait, current);
1561 add_wait_queue(&runtime->sleep, &wait);
1562 set_current_state(TASK_INTERRUPTIBLE);
1563 spin_unlock_irq(&runtime->lock);
1564 timeout = schedule_timeout(30 * HZ);
1565 remove_wait_queue(&runtime->sleep, &wait);
1566 if (signal_pending(current))
1567 return result > 0 ? result : -ERESTARTSYS;
1568 if (runtime->avail == last_avail && !timeout)
1569 return result > 0 ? result : -EIO;
1570 spin_lock_irq(&runtime->lock);
1571 }
1572 spin_unlock_irq(&runtime->lock);
1573 }
1574 return result;
1575}
1576
1577static __poll_t snd_rawmidi_poll(struct file *file, poll_table *wait)
1578{
1579 struct snd_rawmidi_file *rfile;
1580 struct snd_rawmidi_runtime *runtime;
1581 __poll_t mask;
1582
1583 rfile = file->private_data;
1584 if (rfile->input != NULL) {
1585 runtime = rfile->input->runtime;
1586 snd_rawmidi_input_trigger(rfile->input, 1);
1587 poll_wait(file, &runtime->sleep, wait);
1588 }
1589 if (rfile->output != NULL) {
1590 runtime = rfile->output->runtime;
1591 poll_wait(file, &runtime->sleep, wait);
1592 }
1593 mask = 0;
1594 if (rfile->input != NULL) {
1595 if (snd_rawmidi_ready(rfile->input))
1596 mask |= EPOLLIN | EPOLLRDNORM;
1597 }
1598 if (rfile->output != NULL) {
1599 if (snd_rawmidi_ready(rfile->output))
1600 mask |= EPOLLOUT | EPOLLWRNORM;
1601 }
1602 return mask;
1603}
1604
1605
1606
1607#ifdef CONFIG_COMPAT
1608#include "rawmidi_compat.c"
1609#else
1610#define snd_rawmidi_ioctl_compat NULL
1611#endif
1612
1613
1614
1615
1616static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1617 struct snd_info_buffer *buffer)
1618{
1619 struct snd_rawmidi *rmidi;
1620 struct snd_rawmidi_substream *substream;
1621 struct snd_rawmidi_runtime *runtime;
1622 unsigned long buffer_size, avail, xruns;
1623 unsigned int clock_type;
1624 static const char *clock_names[4] = { "none", "realtime", "monotonic", "monotonic raw" };
1625
1626 rmidi = entry->private_data;
1627 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1628 mutex_lock(&rmidi->open_mutex);
1629 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1630 list_for_each_entry(substream,
1631 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1632 list) {
1633 snd_iprintf(buffer,
1634 "Output %d\n"
1635 " Tx bytes : %lu\n",
1636 substream->number,
1637 (unsigned long) substream->bytes);
1638 if (substream->opened) {
1639 snd_iprintf(buffer,
1640 " Owner PID : %d\n",
1641 pid_vnr(substream->pid));
1642 runtime = substream->runtime;
1643 spin_lock_irq(&runtime->lock);
1644 buffer_size = runtime->buffer_size;
1645 avail = runtime->avail;
1646 spin_unlock_irq(&runtime->lock);
1647 snd_iprintf(buffer,
1648 " Mode : %s\n"
1649 " Buffer size : %lu\n"
1650 " Avail : %lu\n",
1651 runtime->oss ? "OSS compatible" : "native",
1652 buffer_size, avail);
1653 }
1654 }
1655 }
1656 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1657 list_for_each_entry(substream,
1658 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1659 list) {
1660 snd_iprintf(buffer,
1661 "Input %d\n"
1662 " Rx bytes : %lu\n",
1663 substream->number,
1664 (unsigned long) substream->bytes);
1665 if (substream->opened) {
1666 snd_iprintf(buffer,
1667 " Owner PID : %d\n",
1668 pid_vnr(substream->pid));
1669 runtime = substream->runtime;
1670 spin_lock_irq(&runtime->lock);
1671 buffer_size = runtime->buffer_size;
1672 avail = runtime->avail;
1673 xruns = runtime->xruns;
1674 spin_unlock_irq(&runtime->lock);
1675 snd_iprintf(buffer,
1676 " Buffer size : %lu\n"
1677 " Avail : %lu\n"
1678 " Overruns : %lu\n",
1679 buffer_size, avail, xruns);
1680 if (substream->framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP) {
1681 clock_type = substream->clock_type >> SNDRV_RAWMIDI_MODE_CLOCK_SHIFT;
1682 if (!snd_BUG_ON(clock_type >= ARRAY_SIZE(clock_names)))
1683 snd_iprintf(buffer,
1684 " Framing : tstamp\n"
1685 " Clock type : %s\n",
1686 clock_names[clock_type]);
1687 }
1688 }
1689 }
1690 }
1691 mutex_unlock(&rmidi->open_mutex);
1692}
1693
1694
1695
1696
1697
1698static const struct file_operations snd_rawmidi_f_ops = {
1699 .owner = THIS_MODULE,
1700 .read = snd_rawmidi_read,
1701 .write = snd_rawmidi_write,
1702 .open = snd_rawmidi_open,
1703 .release = snd_rawmidi_release,
1704 .llseek = no_llseek,
1705 .poll = snd_rawmidi_poll,
1706 .unlocked_ioctl = snd_rawmidi_ioctl,
1707 .compat_ioctl = snd_rawmidi_ioctl_compat,
1708};
1709
1710static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1711 struct snd_rawmidi_str *stream,
1712 int direction,
1713 int count)
1714{
1715 struct snd_rawmidi_substream *substream;
1716 int idx;
1717
1718 for (idx = 0; idx < count; idx++) {
1719 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1720 if (!substream)
1721 return -ENOMEM;
1722 substream->stream = direction;
1723 substream->number = idx;
1724 substream->rmidi = rmidi;
1725 substream->pstr = stream;
1726 list_add_tail(&substream->list, &stream->substreams);
1727 stream->substream_count++;
1728 }
1729 return 0;
1730}
1731
1732static void release_rawmidi_device(struct device *dev)
1733{
1734 kfree(container_of(dev, struct snd_rawmidi, dev));
1735}
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1752 int output_count, int input_count,
1753 struct snd_rawmidi **rrawmidi)
1754{
1755 struct snd_rawmidi *rmidi;
1756 int err;
1757 static const struct snd_device_ops ops = {
1758 .dev_free = snd_rawmidi_dev_free,
1759 .dev_register = snd_rawmidi_dev_register,
1760 .dev_disconnect = snd_rawmidi_dev_disconnect,
1761 };
1762
1763 if (snd_BUG_ON(!card))
1764 return -ENXIO;
1765 if (rrawmidi)
1766 *rrawmidi = NULL;
1767 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1768 if (!rmidi)
1769 return -ENOMEM;
1770 rmidi->card = card;
1771 rmidi->device = device;
1772 mutex_init(&rmidi->open_mutex);
1773 init_waitqueue_head(&rmidi->open_wait);
1774 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1775 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1776
1777 if (id != NULL)
1778 strscpy(rmidi->id, id, sizeof(rmidi->id));
1779
1780 snd_device_initialize(&rmidi->dev, card);
1781 rmidi->dev.release = release_rawmidi_device;
1782 dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device);
1783
1784 err = snd_rawmidi_alloc_substreams(rmidi,
1785 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1786 SNDRV_RAWMIDI_STREAM_INPUT,
1787 input_count);
1788 if (err < 0)
1789 goto error;
1790 err = snd_rawmidi_alloc_substreams(rmidi,
1791 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1792 SNDRV_RAWMIDI_STREAM_OUTPUT,
1793 output_count);
1794 if (err < 0)
1795 goto error;
1796 err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops);
1797 if (err < 0)
1798 goto error;
1799
1800 if (rrawmidi)
1801 *rrawmidi = rmidi;
1802 return 0;
1803
1804 error:
1805 snd_rawmidi_free(rmidi);
1806 return err;
1807}
1808EXPORT_SYMBOL(snd_rawmidi_new);
1809
1810static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1811{
1812 struct snd_rawmidi_substream *substream;
1813
1814 while (!list_empty(&stream->substreams)) {
1815 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1816 list_del(&substream->list);
1817 kfree(substream);
1818 }
1819}
1820
1821static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1822{
1823 if (!rmidi)
1824 return 0;
1825
1826 snd_info_free_entry(rmidi->proc_entry);
1827 rmidi->proc_entry = NULL;
1828 mutex_lock(®ister_mutex);
1829 if (rmidi->ops && rmidi->ops->dev_unregister)
1830 rmidi->ops->dev_unregister(rmidi);
1831 mutex_unlock(®ister_mutex);
1832
1833 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1834 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1835 if (rmidi->private_free)
1836 rmidi->private_free(rmidi);
1837 put_device(&rmidi->dev);
1838 return 0;
1839}
1840
1841static int snd_rawmidi_dev_free(struct snd_device *device)
1842{
1843 struct snd_rawmidi *rmidi = device->device_data;
1844
1845 return snd_rawmidi_free(rmidi);
1846}
1847
1848#if IS_ENABLED(CONFIG_SND_SEQUENCER)
1849static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1850{
1851 struct snd_rawmidi *rmidi = device->private_data;
1852
1853 rmidi->seq_dev = NULL;
1854}
1855#endif
1856
1857static int snd_rawmidi_dev_register(struct snd_device *device)
1858{
1859 int err;
1860 struct snd_info_entry *entry;
1861 char name[16];
1862 struct snd_rawmidi *rmidi = device->device_data;
1863
1864 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1865 return -ENOMEM;
1866 err = 0;
1867 mutex_lock(®ister_mutex);
1868 if (snd_rawmidi_search(rmidi->card, rmidi->device))
1869 err = -EBUSY;
1870 else
1871 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1872 mutex_unlock(®ister_mutex);
1873 if (err < 0)
1874 return err;
1875
1876 err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1877 rmidi->card, rmidi->device,
1878 &snd_rawmidi_f_ops, rmidi, &rmidi->dev);
1879 if (err < 0) {
1880 rmidi_err(rmidi, "unable to register\n");
1881 goto error;
1882 }
1883 if (rmidi->ops && rmidi->ops->dev_register) {
1884 err = rmidi->ops->dev_register(rmidi);
1885 if (err < 0)
1886 goto error_unregister;
1887 }
1888#ifdef CONFIG_SND_OSSEMUL
1889 rmidi->ossreg = 0;
1890 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1891 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1892 rmidi->card, 0, &snd_rawmidi_f_ops,
1893 rmidi) < 0) {
1894 rmidi_err(rmidi,
1895 "unable to register OSS rawmidi device %i:%i\n",
1896 rmidi->card->number, 0);
1897 } else {
1898 rmidi->ossreg++;
1899#ifdef SNDRV_OSS_INFO_DEV_MIDI
1900 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1901#endif
1902 }
1903 }
1904 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1905 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1906 rmidi->card, 1, &snd_rawmidi_f_ops,
1907 rmidi) < 0) {
1908 rmidi_err(rmidi,
1909 "unable to register OSS rawmidi device %i:%i\n",
1910 rmidi->card->number, 1);
1911 } else {
1912 rmidi->ossreg++;
1913 }
1914 }
1915#endif
1916 sprintf(name, "midi%d", rmidi->device);
1917 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1918 if (entry) {
1919 entry->private_data = rmidi;
1920 entry->c.text.read = snd_rawmidi_proc_info_read;
1921 if (snd_info_register(entry) < 0) {
1922 snd_info_free_entry(entry);
1923 entry = NULL;
1924 }
1925 }
1926 rmidi->proc_entry = entry;
1927#if IS_ENABLED(CONFIG_SND_SEQUENCER)
1928 if (!rmidi->ops || !rmidi->ops->dev_register) {
1929 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1930 rmidi->seq_dev->private_data = rmidi;
1931 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1932 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1933 snd_device_register(rmidi->card, rmidi->seq_dev);
1934 }
1935 }
1936#endif
1937 return 0;
1938
1939 error_unregister:
1940 snd_unregister_device(&rmidi->dev);
1941 error:
1942 mutex_lock(®ister_mutex);
1943 list_del(&rmidi->list);
1944 mutex_unlock(®ister_mutex);
1945 return err;
1946}
1947
1948static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1949{
1950 struct snd_rawmidi *rmidi = device->device_data;
1951 int dir;
1952
1953 mutex_lock(®ister_mutex);
1954 mutex_lock(&rmidi->open_mutex);
1955 wake_up(&rmidi->open_wait);
1956 list_del_init(&rmidi->list);
1957 for (dir = 0; dir < 2; dir++) {
1958 struct snd_rawmidi_substream *s;
1959
1960 list_for_each_entry(s, &rmidi->streams[dir].substreams, list) {
1961 if (s->runtime)
1962 wake_up(&s->runtime->sleep);
1963 }
1964 }
1965
1966#ifdef CONFIG_SND_OSSEMUL
1967 if (rmidi->ossreg) {
1968 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1969 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1970#ifdef SNDRV_OSS_INFO_DEV_MIDI
1971 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1972#endif
1973 }
1974 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1975 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1976 rmidi->ossreg = 0;
1977 }
1978#endif
1979 snd_unregister_device(&rmidi->dev);
1980 mutex_unlock(&rmidi->open_mutex);
1981 mutex_unlock(®ister_mutex);
1982 return 0;
1983}
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1994 const struct snd_rawmidi_ops *ops)
1995{
1996 struct snd_rawmidi_substream *substream;
1997
1998 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1999 substream->ops = ops;
2000}
2001EXPORT_SYMBOL(snd_rawmidi_set_ops);
2002
2003
2004
2005
2006
2007static int __init alsa_rawmidi_init(void)
2008{
2009
2010 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
2011 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
2012#ifdef CONFIG_SND_OSSEMUL
2013 { int i;
2014
2015 for (i = 0; i < SNDRV_CARDS; i++) {
2016 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
2017 pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
2018 i, midi_map[i]);
2019 midi_map[i] = 0;
2020 }
2021 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
2022 pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
2023 i, amidi_map[i]);
2024 amidi_map[i] = 1;
2025 }
2026 }
2027 }
2028#endif
2029 return 0;
2030}
2031
2032static void __exit alsa_rawmidi_exit(void)
2033{
2034 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
2035 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
2036}
2037
2038module_init(alsa_rawmidi_init)
2039module_exit(alsa_rawmidi_exit)
2040