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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_USER_PVERSION:
877 if (get_user(rfile->user_pversion, (unsigned int __user *)arg))
878 return -EFAULT;
879 return 0;
880
881 case SNDRV_RAWMIDI_IOCTL_PARAMS:
882 {
883 struct snd_rawmidi_params params;
884
885 if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params)))
886 return -EFAULT;
887 if (rfile->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 2)) {
888 params.mode = 0;
889 memset(params.reserved, 0, sizeof(params.reserved));
890 }
891 switch (params.stream) {
892 case SNDRV_RAWMIDI_STREAM_OUTPUT:
893 if (rfile->output == NULL)
894 return -EINVAL;
895 return snd_rawmidi_output_params(rfile->output, ¶ms);
896 case SNDRV_RAWMIDI_STREAM_INPUT:
897 if (rfile->input == NULL)
898 return -EINVAL;
899 return snd_rawmidi_input_params(rfile->input, ¶ms);
900 default:
901 return -EINVAL;
902 }
903 }
904 case SNDRV_RAWMIDI_IOCTL_STATUS32:
905 return snd_rawmidi_ioctl_status32(rfile, argp);
906 case SNDRV_RAWMIDI_IOCTL_STATUS64:
907 return snd_rawmidi_ioctl_status64(rfile, argp);
908 case SNDRV_RAWMIDI_IOCTL_DROP:
909 {
910 int val;
911
912 if (get_user(val, (int __user *) argp))
913 return -EFAULT;
914 switch (val) {
915 case SNDRV_RAWMIDI_STREAM_OUTPUT:
916 if (rfile->output == NULL)
917 return -EINVAL;
918 return snd_rawmidi_drop_output(rfile->output);
919 default:
920 return -EINVAL;
921 }
922 }
923 case SNDRV_RAWMIDI_IOCTL_DRAIN:
924 {
925 int val;
926
927 if (get_user(val, (int __user *) argp))
928 return -EFAULT;
929 switch (val) {
930 case SNDRV_RAWMIDI_STREAM_OUTPUT:
931 if (rfile->output == NULL)
932 return -EINVAL;
933 return snd_rawmidi_drain_output(rfile->output);
934 case SNDRV_RAWMIDI_STREAM_INPUT:
935 if (rfile->input == NULL)
936 return -EINVAL;
937 return snd_rawmidi_drain_input(rfile->input);
938 default:
939 return -EINVAL;
940 }
941 }
942 default:
943 rmidi_dbg(rfile->rmidi,
944 "rawmidi: unknown command = 0x%x\n", cmd);
945 }
946 return -ENOTTY;
947}
948
949static int snd_rawmidi_control_ioctl(struct snd_card *card,
950 struct snd_ctl_file *control,
951 unsigned int cmd,
952 unsigned long arg)
953{
954 void __user *argp = (void __user *)arg;
955
956 switch (cmd) {
957 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
958 {
959 int device;
960
961 if (get_user(device, (int __user *)argp))
962 return -EFAULT;
963 if (device >= SNDRV_RAWMIDI_DEVICES)
964 device = SNDRV_RAWMIDI_DEVICES - 1;
965 mutex_lock(®ister_mutex);
966 device = device < 0 ? 0 : device + 1;
967 while (device < SNDRV_RAWMIDI_DEVICES) {
968 if (snd_rawmidi_search(card, device))
969 break;
970 device++;
971 }
972 if (device == SNDRV_RAWMIDI_DEVICES)
973 device = -1;
974 mutex_unlock(®ister_mutex);
975 if (put_user(device, (int __user *)argp))
976 return -EFAULT;
977 return 0;
978 }
979 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
980 {
981 int val;
982
983 if (get_user(val, (int __user *)argp))
984 return -EFAULT;
985 control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val;
986 return 0;
987 }
988 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
989 return snd_rawmidi_info_select_user(card, argp);
990 }
991 return -ENOIOCTLCMD;
992}
993
994static int receive_with_tstamp_framing(struct snd_rawmidi_substream *substream,
995 const unsigned char *buffer, int src_count, const struct timespec64 *tstamp)
996{
997 struct snd_rawmidi_runtime *runtime = substream->runtime;
998 struct snd_rawmidi_framing_tstamp *dest_ptr;
999 struct snd_rawmidi_framing_tstamp frame = { .tv_sec = tstamp->tv_sec, .tv_nsec = tstamp->tv_nsec };
1000 int dest_frames = 0;
1001 int orig_count = src_count;
1002 int frame_size = sizeof(struct snd_rawmidi_framing_tstamp);
1003
1004 BUILD_BUG_ON(frame_size != 0x20);
1005 if (snd_BUG_ON((runtime->hw_ptr & 0x1f) != 0))
1006 return -EINVAL;
1007
1008 while (src_count > 0) {
1009 if ((int)(runtime->buffer_size - runtime->avail) < frame_size) {
1010 runtime->xruns += src_count;
1011 break;
1012 }
1013 if (src_count >= SNDRV_RAWMIDI_FRAMING_DATA_LENGTH)
1014 frame.length = SNDRV_RAWMIDI_FRAMING_DATA_LENGTH;
1015 else {
1016 frame.length = src_count;
1017 memset(frame.data, 0, SNDRV_RAWMIDI_FRAMING_DATA_LENGTH);
1018 }
1019 memcpy(frame.data, buffer, frame.length);
1020 buffer += frame.length;
1021 src_count -= frame.length;
1022 dest_ptr = (struct snd_rawmidi_framing_tstamp *) (runtime->buffer + runtime->hw_ptr);
1023 *dest_ptr = frame;
1024 runtime->avail += frame_size;
1025 runtime->hw_ptr += frame_size;
1026 runtime->hw_ptr %= runtime->buffer_size;
1027 dest_frames++;
1028 }
1029 return orig_count - src_count;
1030}
1031
1032static struct timespec64 get_framing_tstamp(struct snd_rawmidi_substream *substream)
1033{
1034 struct timespec64 ts64 = {0, 0};
1035
1036 switch (substream->clock_type) {
1037 case SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC_RAW:
1038 ktime_get_raw_ts64(&ts64);
1039 break;
1040 case SNDRV_RAWMIDI_MODE_CLOCK_MONOTONIC:
1041 ktime_get_ts64(&ts64);
1042 break;
1043 case SNDRV_RAWMIDI_MODE_CLOCK_REALTIME:
1044 ktime_get_real_ts64(&ts64);
1045 break;
1046 }
1047 return ts64;
1048}
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
1061 const unsigned char *buffer, int count)
1062{
1063 unsigned long flags;
1064 struct timespec64 ts64 = get_framing_tstamp(substream);
1065 int result = 0, count1;
1066 struct snd_rawmidi_runtime *runtime = substream->runtime;
1067
1068 if (!substream->opened)
1069 return -EBADFD;
1070 if (runtime->buffer == NULL) {
1071 rmidi_dbg(substream->rmidi,
1072 "snd_rawmidi_receive: input is not active!!!\n");
1073 return -EINVAL;
1074 }
1075
1076 spin_lock_irqsave(&runtime->lock, flags);
1077 if (substream->framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP) {
1078 result = receive_with_tstamp_framing(substream, buffer, count, &ts64);
1079 } else if (count == 1) {
1080 substream->bytes++;
1081 if (runtime->avail < runtime->buffer_size) {
1082 runtime->buffer[runtime->hw_ptr++] = buffer[0];
1083 runtime->hw_ptr %= runtime->buffer_size;
1084 runtime->avail++;
1085 result++;
1086 } else {
1087 runtime->xruns++;
1088 }
1089 } else {
1090 substream->bytes += count;
1091 count1 = runtime->buffer_size - runtime->hw_ptr;
1092 if (count1 > count)
1093 count1 = count;
1094 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1095 count1 = runtime->buffer_size - runtime->avail;
1096 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
1097 runtime->hw_ptr += count1;
1098 runtime->hw_ptr %= runtime->buffer_size;
1099 runtime->avail += count1;
1100 count -= count1;
1101 result += count1;
1102 if (count > 0) {
1103 buffer += count1;
1104 count1 = count;
1105 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
1106 count1 = runtime->buffer_size - runtime->avail;
1107 runtime->xruns += count - count1;
1108 }
1109 if (count1 > 0) {
1110 memcpy(runtime->buffer, buffer, count1);
1111 runtime->hw_ptr = count1;
1112 runtime->avail += count1;
1113 result += count1;
1114 }
1115 }
1116 }
1117 if (result > 0) {
1118 if (runtime->event)
1119 schedule_work(&runtime->event_work);
1120 else if (__snd_rawmidi_ready(runtime))
1121 wake_up(&runtime->sleep);
1122 }
1123 spin_unlock_irqrestore(&runtime->lock, flags);
1124 return result;
1125}
1126EXPORT_SYMBOL(snd_rawmidi_receive);
1127
1128static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
1129 unsigned char __user *userbuf,
1130 unsigned char *kernelbuf, long count)
1131{
1132 unsigned long flags;
1133 long result = 0, count1;
1134 struct snd_rawmidi_runtime *runtime = substream->runtime;
1135 unsigned long appl_ptr;
1136 int err = 0;
1137
1138 spin_lock_irqsave(&runtime->lock, flags);
1139 snd_rawmidi_buffer_ref(runtime);
1140 while (count > 0 && runtime->avail) {
1141 count1 = runtime->buffer_size - runtime->appl_ptr;
1142 if (count1 > count)
1143 count1 = count;
1144 if (count1 > (int)runtime->avail)
1145 count1 = runtime->avail;
1146
1147
1148 appl_ptr = runtime->appl_ptr;
1149 runtime->appl_ptr += count1;
1150 runtime->appl_ptr %= runtime->buffer_size;
1151 runtime->avail -= count1;
1152
1153 if (kernelbuf)
1154 memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1);
1155 if (userbuf) {
1156 spin_unlock_irqrestore(&runtime->lock, flags);
1157 if (copy_to_user(userbuf + result,
1158 runtime->buffer + appl_ptr, count1))
1159 err = -EFAULT;
1160 spin_lock_irqsave(&runtime->lock, flags);
1161 if (err)
1162 goto out;
1163 }
1164 result += count1;
1165 count -= count1;
1166 }
1167 out:
1168 snd_rawmidi_buffer_unref(runtime);
1169 spin_unlock_irqrestore(&runtime->lock, flags);
1170 return result > 0 ? result : err;
1171}
1172
1173long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
1174 unsigned char *buf, long count)
1175{
1176 snd_rawmidi_input_trigger(substream, 1);
1177 return snd_rawmidi_kernel_read1(substream, NULL, buf, count);
1178}
1179EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1180
1181static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
1182 loff_t *offset)
1183{
1184 long result;
1185 int count1;
1186 struct snd_rawmidi_file *rfile;
1187 struct snd_rawmidi_substream *substream;
1188 struct snd_rawmidi_runtime *runtime;
1189
1190 rfile = file->private_data;
1191 substream = rfile->input;
1192 if (substream == NULL)
1193 return -EIO;
1194 runtime = substream->runtime;
1195 snd_rawmidi_input_trigger(substream, 1);
1196 result = 0;
1197 while (count > 0) {
1198 spin_lock_irq(&runtime->lock);
1199 while (!__snd_rawmidi_ready(runtime)) {
1200 wait_queue_entry_t wait;
1201
1202 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1203 spin_unlock_irq(&runtime->lock);
1204 return result > 0 ? result : -EAGAIN;
1205 }
1206 init_waitqueue_entry(&wait, current);
1207 add_wait_queue(&runtime->sleep, &wait);
1208 set_current_state(TASK_INTERRUPTIBLE);
1209 spin_unlock_irq(&runtime->lock);
1210 schedule();
1211 remove_wait_queue(&runtime->sleep, &wait);
1212 if (rfile->rmidi->card->shutdown)
1213 return -ENODEV;
1214 if (signal_pending(current))
1215 return result > 0 ? result : -ERESTARTSYS;
1216 spin_lock_irq(&runtime->lock);
1217 if (!runtime->avail) {
1218 spin_unlock_irq(&runtime->lock);
1219 return result > 0 ? result : -EIO;
1220 }
1221 }
1222 spin_unlock_irq(&runtime->lock);
1223 count1 = snd_rawmidi_kernel_read1(substream,
1224 (unsigned char __user *)buf,
1225 NULL,
1226 count);
1227 if (count1 < 0)
1228 return result > 0 ? result : count1;
1229 result += count1;
1230 buf += count1;
1231 count -= count1;
1232 }
1233 return result;
1234}
1235
1236
1237
1238
1239
1240
1241
1242int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1243{
1244 struct snd_rawmidi_runtime *runtime = substream->runtime;
1245 int result;
1246 unsigned long flags;
1247
1248 if (runtime->buffer == NULL) {
1249 rmidi_dbg(substream->rmidi,
1250 "snd_rawmidi_transmit_empty: output is not active!!!\n");
1251 return 1;
1252 }
1253 spin_lock_irqsave(&runtime->lock, flags);
1254 result = runtime->avail >= runtime->buffer_size;
1255 spin_unlock_irqrestore(&runtime->lock, flags);
1256 return result;
1257}
1258EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1269 unsigned char *buffer, int count)
1270{
1271 int result, count1;
1272 struct snd_rawmidi_runtime *runtime = substream->runtime;
1273
1274 if (runtime->buffer == NULL) {
1275 rmidi_dbg(substream->rmidi,
1276 "snd_rawmidi_transmit_peek: output is not active!!!\n");
1277 return -EINVAL;
1278 }
1279 result = 0;
1280 if (runtime->avail >= runtime->buffer_size) {
1281
1282 goto __skip;
1283 }
1284 if (count == 1) {
1285 *buffer = runtime->buffer[runtime->hw_ptr];
1286 result++;
1287 } else {
1288 count1 = runtime->buffer_size - runtime->hw_ptr;
1289 if (count1 > count)
1290 count1 = count;
1291 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1292 count1 = runtime->buffer_size - runtime->avail;
1293 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1294 count -= count1;
1295 result += count1;
1296 if (count > 0) {
1297 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1298 count = runtime->buffer_size - runtime->avail - count1;
1299 memcpy(buffer + count1, runtime->buffer, count);
1300 result += count;
1301 }
1302 }
1303 __skip:
1304 return result;
1305}
1306EXPORT_SYMBOL(__snd_rawmidi_transmit_peek);
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1323 unsigned char *buffer, int count)
1324{
1325 struct snd_rawmidi_runtime *runtime = substream->runtime;
1326 int result;
1327 unsigned long flags;
1328
1329 spin_lock_irqsave(&runtime->lock, flags);
1330 result = __snd_rawmidi_transmit_peek(substream, buffer, count);
1331 spin_unlock_irqrestore(&runtime->lock, flags);
1332 return result;
1333}
1334EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1335
1336
1337
1338
1339
1340
1341
1342
1343int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1344{
1345 struct snd_rawmidi_runtime *runtime = substream->runtime;
1346
1347 if (runtime->buffer == NULL) {
1348 rmidi_dbg(substream->rmidi,
1349 "snd_rawmidi_transmit_ack: output is not active!!!\n");
1350 return -EINVAL;
1351 }
1352 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1353 runtime->hw_ptr += count;
1354 runtime->hw_ptr %= runtime->buffer_size;
1355 runtime->avail += count;
1356 substream->bytes += count;
1357 if (count > 0) {
1358 if (runtime->drain || __snd_rawmidi_ready(runtime))
1359 wake_up(&runtime->sleep);
1360 }
1361 return count;
1362}
1363EXPORT_SYMBOL(__snd_rawmidi_transmit_ack);
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1377{
1378 struct snd_rawmidi_runtime *runtime = substream->runtime;
1379 int result;
1380 unsigned long flags;
1381
1382 spin_lock_irqsave(&runtime->lock, flags);
1383 result = __snd_rawmidi_transmit_ack(substream, count);
1384 spin_unlock_irqrestore(&runtime->lock, flags);
1385 return result;
1386}
1387EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1400 unsigned char *buffer, int count)
1401{
1402 struct snd_rawmidi_runtime *runtime = substream->runtime;
1403 int result;
1404 unsigned long flags;
1405
1406 spin_lock_irqsave(&runtime->lock, flags);
1407 if (!substream->opened)
1408 result = -EBADFD;
1409 else {
1410 count = __snd_rawmidi_transmit_peek(substream, buffer, count);
1411 if (count <= 0)
1412 result = count;
1413 else
1414 result = __snd_rawmidi_transmit_ack(substream, count);
1415 }
1416 spin_unlock_irqrestore(&runtime->lock, flags);
1417 return result;
1418}
1419EXPORT_SYMBOL(snd_rawmidi_transmit);
1420
1421
1422
1423
1424
1425
1426
1427int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream)
1428{
1429 struct snd_rawmidi_runtime *runtime = substream->runtime;
1430 unsigned long flags;
1431 int count = 0;
1432
1433 spin_lock_irqsave(&runtime->lock, flags);
1434 if (runtime->avail < runtime->buffer_size) {
1435 count = runtime->buffer_size - runtime->avail;
1436 __snd_rawmidi_transmit_ack(substream, count);
1437 }
1438 spin_unlock_irqrestore(&runtime->lock, flags);
1439 return count;
1440}
1441EXPORT_SYMBOL(snd_rawmidi_proceed);
1442
1443static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1444 const unsigned char __user *userbuf,
1445 const unsigned char *kernelbuf,
1446 long count)
1447{
1448 unsigned long flags;
1449 long count1, result;
1450 struct snd_rawmidi_runtime *runtime = substream->runtime;
1451 unsigned long appl_ptr;
1452
1453 if (!kernelbuf && !userbuf)
1454 return -EINVAL;
1455 if (snd_BUG_ON(!runtime->buffer))
1456 return -EINVAL;
1457
1458 result = 0;
1459 spin_lock_irqsave(&runtime->lock, flags);
1460 if (substream->append) {
1461 if ((long)runtime->avail < count) {
1462 spin_unlock_irqrestore(&runtime->lock, flags);
1463 return -EAGAIN;
1464 }
1465 }
1466 snd_rawmidi_buffer_ref(runtime);
1467 while (count > 0 && runtime->avail > 0) {
1468 count1 = runtime->buffer_size - runtime->appl_ptr;
1469 if (count1 > count)
1470 count1 = count;
1471 if (count1 > (long)runtime->avail)
1472 count1 = runtime->avail;
1473
1474
1475 appl_ptr = runtime->appl_ptr;
1476 runtime->appl_ptr += count1;
1477 runtime->appl_ptr %= runtime->buffer_size;
1478 runtime->avail -= count1;
1479
1480 if (kernelbuf)
1481 memcpy(runtime->buffer + appl_ptr,
1482 kernelbuf + result, count1);
1483 else if (userbuf) {
1484 spin_unlock_irqrestore(&runtime->lock, flags);
1485 if (copy_from_user(runtime->buffer + appl_ptr,
1486 userbuf + result, count1)) {
1487 spin_lock_irqsave(&runtime->lock, flags);
1488 result = result > 0 ? result : -EFAULT;
1489 goto __end;
1490 }
1491 spin_lock_irqsave(&runtime->lock, flags);
1492 }
1493 result += count1;
1494 count -= count1;
1495 }
1496 __end:
1497 count1 = runtime->avail < runtime->buffer_size;
1498 snd_rawmidi_buffer_unref(runtime);
1499 spin_unlock_irqrestore(&runtime->lock, flags);
1500 if (count1)
1501 snd_rawmidi_output_trigger(substream, 1);
1502 return result;
1503}
1504
1505long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1506 const unsigned char *buf, long count)
1507{
1508 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1509}
1510EXPORT_SYMBOL(snd_rawmidi_kernel_write);
1511
1512static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1513 size_t count, loff_t *offset)
1514{
1515 long result, timeout;
1516 int count1;
1517 struct snd_rawmidi_file *rfile;
1518 struct snd_rawmidi_runtime *runtime;
1519 struct snd_rawmidi_substream *substream;
1520
1521 rfile = file->private_data;
1522 substream = rfile->output;
1523 runtime = substream->runtime;
1524
1525 if (substream->append && count > runtime->buffer_size)
1526 return -EIO;
1527 result = 0;
1528 while (count > 0) {
1529 spin_lock_irq(&runtime->lock);
1530 while (!snd_rawmidi_ready_append(substream, count)) {
1531 wait_queue_entry_t wait;
1532
1533 if (file->f_flags & O_NONBLOCK) {
1534 spin_unlock_irq(&runtime->lock);
1535 return result > 0 ? result : -EAGAIN;
1536 }
1537 init_waitqueue_entry(&wait, current);
1538 add_wait_queue(&runtime->sleep, &wait);
1539 set_current_state(TASK_INTERRUPTIBLE);
1540 spin_unlock_irq(&runtime->lock);
1541 timeout = schedule_timeout(30 * HZ);
1542 remove_wait_queue(&runtime->sleep, &wait);
1543 if (rfile->rmidi->card->shutdown)
1544 return -ENODEV;
1545 if (signal_pending(current))
1546 return result > 0 ? result : -ERESTARTSYS;
1547 spin_lock_irq(&runtime->lock);
1548 if (!runtime->avail && !timeout) {
1549 spin_unlock_irq(&runtime->lock);
1550 return result > 0 ? result : -EIO;
1551 }
1552 }
1553 spin_unlock_irq(&runtime->lock);
1554 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1555 if (count1 < 0)
1556 return result > 0 ? result : count1;
1557 result += count1;
1558 buf += count1;
1559 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1560 break;
1561 count -= count1;
1562 }
1563 if (file->f_flags & O_DSYNC) {
1564 spin_lock_irq(&runtime->lock);
1565 while (runtime->avail != runtime->buffer_size) {
1566 wait_queue_entry_t wait;
1567 unsigned int last_avail = runtime->avail;
1568
1569 init_waitqueue_entry(&wait, current);
1570 add_wait_queue(&runtime->sleep, &wait);
1571 set_current_state(TASK_INTERRUPTIBLE);
1572 spin_unlock_irq(&runtime->lock);
1573 timeout = schedule_timeout(30 * HZ);
1574 remove_wait_queue(&runtime->sleep, &wait);
1575 if (signal_pending(current))
1576 return result > 0 ? result : -ERESTARTSYS;
1577 if (runtime->avail == last_avail && !timeout)
1578 return result > 0 ? result : -EIO;
1579 spin_lock_irq(&runtime->lock);
1580 }
1581 spin_unlock_irq(&runtime->lock);
1582 }
1583 return result;
1584}
1585
1586static __poll_t snd_rawmidi_poll(struct file *file, poll_table *wait)
1587{
1588 struct snd_rawmidi_file *rfile;
1589 struct snd_rawmidi_runtime *runtime;
1590 __poll_t mask;
1591
1592 rfile = file->private_data;
1593 if (rfile->input != NULL) {
1594 runtime = rfile->input->runtime;
1595 snd_rawmidi_input_trigger(rfile->input, 1);
1596 poll_wait(file, &runtime->sleep, wait);
1597 }
1598 if (rfile->output != NULL) {
1599 runtime = rfile->output->runtime;
1600 poll_wait(file, &runtime->sleep, wait);
1601 }
1602 mask = 0;
1603 if (rfile->input != NULL) {
1604 if (snd_rawmidi_ready(rfile->input))
1605 mask |= EPOLLIN | EPOLLRDNORM;
1606 }
1607 if (rfile->output != NULL) {
1608 if (snd_rawmidi_ready(rfile->output))
1609 mask |= EPOLLOUT | EPOLLWRNORM;
1610 }
1611 return mask;
1612}
1613
1614
1615
1616#ifdef CONFIG_COMPAT
1617#include "rawmidi_compat.c"
1618#else
1619#define snd_rawmidi_ioctl_compat NULL
1620#endif
1621
1622
1623
1624
1625static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1626 struct snd_info_buffer *buffer)
1627{
1628 struct snd_rawmidi *rmidi;
1629 struct snd_rawmidi_substream *substream;
1630 struct snd_rawmidi_runtime *runtime;
1631 unsigned long buffer_size, avail, xruns;
1632 unsigned int clock_type;
1633 static const char *clock_names[4] = { "none", "realtime", "monotonic", "monotonic raw" };
1634
1635 rmidi = entry->private_data;
1636 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1637 mutex_lock(&rmidi->open_mutex);
1638 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1639 list_for_each_entry(substream,
1640 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1641 list) {
1642 snd_iprintf(buffer,
1643 "Output %d\n"
1644 " Tx bytes : %lu\n",
1645 substream->number,
1646 (unsigned long) substream->bytes);
1647 if (substream->opened) {
1648 snd_iprintf(buffer,
1649 " Owner PID : %d\n",
1650 pid_vnr(substream->pid));
1651 runtime = substream->runtime;
1652 spin_lock_irq(&runtime->lock);
1653 buffer_size = runtime->buffer_size;
1654 avail = runtime->avail;
1655 spin_unlock_irq(&runtime->lock);
1656 snd_iprintf(buffer,
1657 " Mode : %s\n"
1658 " Buffer size : %lu\n"
1659 " Avail : %lu\n",
1660 runtime->oss ? "OSS compatible" : "native",
1661 buffer_size, avail);
1662 }
1663 }
1664 }
1665 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1666 list_for_each_entry(substream,
1667 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1668 list) {
1669 snd_iprintf(buffer,
1670 "Input %d\n"
1671 " Rx bytes : %lu\n",
1672 substream->number,
1673 (unsigned long) substream->bytes);
1674 if (substream->opened) {
1675 snd_iprintf(buffer,
1676 " Owner PID : %d\n",
1677 pid_vnr(substream->pid));
1678 runtime = substream->runtime;
1679 spin_lock_irq(&runtime->lock);
1680 buffer_size = runtime->buffer_size;
1681 avail = runtime->avail;
1682 xruns = runtime->xruns;
1683 spin_unlock_irq(&runtime->lock);
1684 snd_iprintf(buffer,
1685 " Buffer size : %lu\n"
1686 " Avail : %lu\n"
1687 " Overruns : %lu\n",
1688 buffer_size, avail, xruns);
1689 if (substream->framing == SNDRV_RAWMIDI_MODE_FRAMING_TSTAMP) {
1690 clock_type = substream->clock_type >> SNDRV_RAWMIDI_MODE_CLOCK_SHIFT;
1691 if (!snd_BUG_ON(clock_type >= ARRAY_SIZE(clock_names)))
1692 snd_iprintf(buffer,
1693 " Framing : tstamp\n"
1694 " Clock type : %s\n",
1695 clock_names[clock_type]);
1696 }
1697 }
1698 }
1699 }
1700 mutex_unlock(&rmidi->open_mutex);
1701}
1702
1703
1704
1705
1706
1707static const struct file_operations snd_rawmidi_f_ops = {
1708 .owner = THIS_MODULE,
1709 .read = snd_rawmidi_read,
1710 .write = snd_rawmidi_write,
1711 .open = snd_rawmidi_open,
1712 .release = snd_rawmidi_release,
1713 .llseek = no_llseek,
1714 .poll = snd_rawmidi_poll,
1715 .unlocked_ioctl = snd_rawmidi_ioctl,
1716 .compat_ioctl = snd_rawmidi_ioctl_compat,
1717};
1718
1719static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1720 struct snd_rawmidi_str *stream,
1721 int direction,
1722 int count)
1723{
1724 struct snd_rawmidi_substream *substream;
1725 int idx;
1726
1727 for (idx = 0; idx < count; idx++) {
1728 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1729 if (!substream)
1730 return -ENOMEM;
1731 substream->stream = direction;
1732 substream->number = idx;
1733 substream->rmidi = rmidi;
1734 substream->pstr = stream;
1735 list_add_tail(&substream->list, &stream->substreams);
1736 stream->substream_count++;
1737 }
1738 return 0;
1739}
1740
1741static void release_rawmidi_device(struct device *dev)
1742{
1743 kfree(container_of(dev, struct snd_rawmidi, dev));
1744}
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1761 int output_count, int input_count,
1762 struct snd_rawmidi **rrawmidi)
1763{
1764 struct snd_rawmidi *rmidi;
1765 int err;
1766 static const struct snd_device_ops ops = {
1767 .dev_free = snd_rawmidi_dev_free,
1768 .dev_register = snd_rawmidi_dev_register,
1769 .dev_disconnect = snd_rawmidi_dev_disconnect,
1770 };
1771
1772 if (snd_BUG_ON(!card))
1773 return -ENXIO;
1774 if (rrawmidi)
1775 *rrawmidi = NULL;
1776 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1777 if (!rmidi)
1778 return -ENOMEM;
1779 rmidi->card = card;
1780 rmidi->device = device;
1781 mutex_init(&rmidi->open_mutex);
1782 init_waitqueue_head(&rmidi->open_wait);
1783 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1784 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1785
1786 if (id != NULL)
1787 strscpy(rmidi->id, id, sizeof(rmidi->id));
1788
1789 snd_device_initialize(&rmidi->dev, card);
1790 rmidi->dev.release = release_rawmidi_device;
1791 dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device);
1792
1793 err = snd_rawmidi_alloc_substreams(rmidi,
1794 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1795 SNDRV_RAWMIDI_STREAM_INPUT,
1796 input_count);
1797 if (err < 0)
1798 goto error;
1799 err = snd_rawmidi_alloc_substreams(rmidi,
1800 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1801 SNDRV_RAWMIDI_STREAM_OUTPUT,
1802 output_count);
1803 if (err < 0)
1804 goto error;
1805 err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops);
1806 if (err < 0)
1807 goto error;
1808
1809 if (rrawmidi)
1810 *rrawmidi = rmidi;
1811 return 0;
1812
1813 error:
1814 snd_rawmidi_free(rmidi);
1815 return err;
1816}
1817EXPORT_SYMBOL(snd_rawmidi_new);
1818
1819static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1820{
1821 struct snd_rawmidi_substream *substream;
1822
1823 while (!list_empty(&stream->substreams)) {
1824 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1825 list_del(&substream->list);
1826 kfree(substream);
1827 }
1828}
1829
1830static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1831{
1832 if (!rmidi)
1833 return 0;
1834
1835 snd_info_free_entry(rmidi->proc_entry);
1836 rmidi->proc_entry = NULL;
1837 mutex_lock(®ister_mutex);
1838 if (rmidi->ops && rmidi->ops->dev_unregister)
1839 rmidi->ops->dev_unregister(rmidi);
1840 mutex_unlock(®ister_mutex);
1841
1842 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1843 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1844 if (rmidi->private_free)
1845 rmidi->private_free(rmidi);
1846 put_device(&rmidi->dev);
1847 return 0;
1848}
1849
1850static int snd_rawmidi_dev_free(struct snd_device *device)
1851{
1852 struct snd_rawmidi *rmidi = device->device_data;
1853
1854 return snd_rawmidi_free(rmidi);
1855}
1856
1857#if IS_ENABLED(CONFIG_SND_SEQUENCER)
1858static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1859{
1860 struct snd_rawmidi *rmidi = device->private_data;
1861
1862 rmidi->seq_dev = NULL;
1863}
1864#endif
1865
1866static int snd_rawmidi_dev_register(struct snd_device *device)
1867{
1868 int err;
1869 struct snd_info_entry *entry;
1870 char name[16];
1871 struct snd_rawmidi *rmidi = device->device_data;
1872
1873 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1874 return -ENOMEM;
1875 err = 0;
1876 mutex_lock(®ister_mutex);
1877 if (snd_rawmidi_search(rmidi->card, rmidi->device))
1878 err = -EBUSY;
1879 else
1880 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1881 mutex_unlock(®ister_mutex);
1882 if (err < 0)
1883 return err;
1884
1885 err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1886 rmidi->card, rmidi->device,
1887 &snd_rawmidi_f_ops, rmidi, &rmidi->dev);
1888 if (err < 0) {
1889 rmidi_err(rmidi, "unable to register\n");
1890 goto error;
1891 }
1892 if (rmidi->ops && rmidi->ops->dev_register) {
1893 err = rmidi->ops->dev_register(rmidi);
1894 if (err < 0)
1895 goto error_unregister;
1896 }
1897#ifdef CONFIG_SND_OSSEMUL
1898 rmidi->ossreg = 0;
1899 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1900 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1901 rmidi->card, 0, &snd_rawmidi_f_ops,
1902 rmidi) < 0) {
1903 rmidi_err(rmidi,
1904 "unable to register OSS rawmidi device %i:%i\n",
1905 rmidi->card->number, 0);
1906 } else {
1907 rmidi->ossreg++;
1908#ifdef SNDRV_OSS_INFO_DEV_MIDI
1909 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1910#endif
1911 }
1912 }
1913 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1914 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1915 rmidi->card, 1, &snd_rawmidi_f_ops,
1916 rmidi) < 0) {
1917 rmidi_err(rmidi,
1918 "unable to register OSS rawmidi device %i:%i\n",
1919 rmidi->card->number, 1);
1920 } else {
1921 rmidi->ossreg++;
1922 }
1923 }
1924#endif
1925 sprintf(name, "midi%d", rmidi->device);
1926 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1927 if (entry) {
1928 entry->private_data = rmidi;
1929 entry->c.text.read = snd_rawmidi_proc_info_read;
1930 if (snd_info_register(entry) < 0) {
1931 snd_info_free_entry(entry);
1932 entry = NULL;
1933 }
1934 }
1935 rmidi->proc_entry = entry;
1936#if IS_ENABLED(CONFIG_SND_SEQUENCER)
1937 if (!rmidi->ops || !rmidi->ops->dev_register) {
1938 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1939 rmidi->seq_dev->private_data = rmidi;
1940 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1941 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1942 snd_device_register(rmidi->card, rmidi->seq_dev);
1943 }
1944 }
1945#endif
1946 return 0;
1947
1948 error_unregister:
1949 snd_unregister_device(&rmidi->dev);
1950 error:
1951 mutex_lock(®ister_mutex);
1952 list_del(&rmidi->list);
1953 mutex_unlock(®ister_mutex);
1954 return err;
1955}
1956
1957static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1958{
1959 struct snd_rawmidi *rmidi = device->device_data;
1960 int dir;
1961
1962 mutex_lock(®ister_mutex);
1963 mutex_lock(&rmidi->open_mutex);
1964 wake_up(&rmidi->open_wait);
1965 list_del_init(&rmidi->list);
1966 for (dir = 0; dir < 2; dir++) {
1967 struct snd_rawmidi_substream *s;
1968
1969 list_for_each_entry(s, &rmidi->streams[dir].substreams, list) {
1970 if (s->runtime)
1971 wake_up(&s->runtime->sleep);
1972 }
1973 }
1974
1975#ifdef CONFIG_SND_OSSEMUL
1976 if (rmidi->ossreg) {
1977 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1978 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1979#ifdef SNDRV_OSS_INFO_DEV_MIDI
1980 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1981#endif
1982 }
1983 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1984 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1985 rmidi->ossreg = 0;
1986 }
1987#endif
1988 snd_unregister_device(&rmidi->dev);
1989 mutex_unlock(&rmidi->open_mutex);
1990 mutex_unlock(®ister_mutex);
1991 return 0;
1992}
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
2003 const struct snd_rawmidi_ops *ops)
2004{
2005 struct snd_rawmidi_substream *substream;
2006
2007 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
2008 substream->ops = ops;
2009}
2010EXPORT_SYMBOL(snd_rawmidi_set_ops);
2011
2012
2013
2014
2015
2016static int __init alsa_rawmidi_init(void)
2017{
2018
2019 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
2020 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
2021#ifdef CONFIG_SND_OSSEMUL
2022 { int i;
2023
2024 for (i = 0; i < SNDRV_CARDS; i++) {
2025 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
2026 pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
2027 i, midi_map[i]);
2028 midi_map[i] = 0;
2029 }
2030 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
2031 pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
2032 i, amidi_map[i]);
2033 amidi_map[i] = 1;
2034 }
2035 }
2036 }
2037#endif
2038 return 0;
2039}
2040
2041static void __exit alsa_rawmidi_exit(void)
2042{
2043 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
2044 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
2045}
2046
2047module_init(alsa_rawmidi_init)
2048module_exit(alsa_rawmidi_exit)
2049