Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Abstract layer for MIDI v1.0 stream | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <sound/core.h> |
8 | #include <linux/major.h> | |
9 | #include <linux/init.h> | |
174cd4b1 | 10 | #include <linux/sched/signal.h> |
1da177e4 LT |
11 | #include <linux/slab.h> |
12 | #include <linux/time.h> | |
13 | #include <linux/wait.h> | |
1a60d4c5 | 14 | #include <linux/mutex.h> |
65a77217 | 15 | #include <linux/module.h> |
1da177e4 | 16 | #include <linux/delay.h> |
ef4db239 | 17 | #include <linux/mm.h> |
2b1d9c8f | 18 | #include <linux/nospec.h> |
1da177e4 LT |
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 | ||
c1017a4c | 25 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
26 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
29 | #ifdef CONFIG_SND_OSSEMUL | |
6581f4e7 | 30 | static int midi_map[SNDRV_CARDS]; |
1da177e4 LT |
31 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
32 | module_param_array(midi_map, int, NULL, 0444); | |
33 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
34 | module_param_array(amidi_map, int, NULL, 0444); | |
35 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
36 | #endif /* CONFIG_SND_OSSEMUL */ | |
37 | ||
48c9d417 TI |
38 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
39 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
40 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
41 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
1da177e4 | 42 | |
f87135f5 | 43 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 44 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 45 | |
ca20d292 | 46 | #define rmidi_err(rmidi, fmt, args...) \ |
07cc3e8b | 47 | dev_err(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 48 | #define rmidi_warn(rmidi, fmt, args...) \ |
07cc3e8b | 49 | dev_warn(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 50 | #define rmidi_dbg(rmidi, fmt, args...) \ |
07cc3e8b | 51 | dev_dbg(&(rmidi)->dev, fmt, ##args) |
ca20d292 | 52 | |
f87135f5 CL |
53 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
54 | { | |
f87135f5 CL |
55 | struct snd_rawmidi *rawmidi; |
56 | ||
9244b2c3 | 57 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
58 | if (rawmidi->card == card && rawmidi->device == device) |
59 | return rawmidi; | |
f87135f5 CL |
60 | return NULL; |
61 | } | |
62 | ||
1da177e4 LT |
63 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
64 | { | |
65 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
66 | case FMODE_WRITE: | |
67 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
68 | case FMODE_READ: | |
69 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
70 | default: | |
71 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
72 | } | |
73 | } | |
74 | ||
48c9d417 | 75 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 76 | { |
48c9d417 | 77 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
5bed9139 | 78 | |
1da177e4 LT |
79 | return runtime->avail >= runtime->avail_min; |
80 | } | |
81 | ||
48c9d417 TI |
82 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
83 | size_t count) | |
1da177e4 | 84 | { |
48c9d417 | 85 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
5bed9139 | 86 | |
1da177e4 LT |
87 | return runtime->avail >= runtime->avail_min && |
88 | (!substream->append || runtime->avail >= count); | |
89 | } | |
90 | ||
b3c705aa | 91 | static void snd_rawmidi_input_event_work(struct work_struct *work) |
1da177e4 | 92 | { |
b3c705aa TI |
93 | struct snd_rawmidi_runtime *runtime = |
94 | container_of(work, struct snd_rawmidi_runtime, event_work); | |
5bed9139 | 95 | |
b3c705aa TI |
96 | if (runtime->event) |
97 | runtime->event(runtime->substream); | |
1da177e4 LT |
98 | } |
99 | ||
48c9d417 | 100 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 101 | { |
48c9d417 | 102 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 103 | |
5bed9139 TI |
104 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
105 | if (!runtime) | |
1da177e4 | 106 | return -ENOMEM; |
b3c705aa | 107 | runtime->substream = substream; |
1da177e4 LT |
108 | spin_lock_init(&runtime->lock); |
109 | init_waitqueue_head(&runtime->sleep); | |
b3c705aa | 110 | INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work); |
1da177e4 LT |
111 | runtime->event = NULL; |
112 | runtime->buffer_size = PAGE_SIZE; | |
113 | runtime->avail_min = 1; | |
114 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
115 | runtime->avail = 0; | |
116 | else | |
117 | runtime->avail = runtime->buffer_size; | |
5a7b44a8 | 118 | runtime->buffer = kvzalloc(runtime->buffer_size, GFP_KERNEL); |
5bed9139 | 119 | if (!runtime->buffer) { |
1da177e4 LT |
120 | kfree(runtime); |
121 | return -ENOMEM; | |
122 | } | |
123 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
124 | substream->runtime = runtime; | |
125 | return 0; | |
126 | } | |
127 | ||
48c9d417 | 128 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 129 | { |
48c9d417 | 130 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 131 | |
ef4db239 | 132 | kvfree(runtime->buffer); |
1da177e4 LT |
133 | kfree(runtime); |
134 | substream->runtime = NULL; | |
135 | return 0; | |
136 | } | |
137 | ||
5bed9139 | 138 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 139 | { |
219df32f TI |
140 | if (!substream->opened) |
141 | return; | |
b3c705aa | 142 | substream->ops->trigger(substream, up); |
1da177e4 LT |
143 | } |
144 | ||
48c9d417 | 145 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 146 | { |
219df32f TI |
147 | if (!substream->opened) |
148 | return; | |
1da177e4 | 149 | substream->ops->trigger(substream, up); |
b3c705aa TI |
150 | if (!up) |
151 | cancel_work_sync(&substream->runtime->event_work); | |
1da177e4 LT |
152 | } |
153 | ||
f5beb598 TI |
154 | static void __reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime, |
155 | bool is_input) | |
156 | { | |
157 | runtime->drain = 0; | |
158 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
159 | runtime->avail = is_input ? 0 : runtime->buffer_size; | |
160 | } | |
161 | ||
162 | static void reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime, | |
163 | bool is_input) | |
1da177e4 LT |
164 | { |
165 | unsigned long flags; | |
1da177e4 | 166 | |
1da177e4 | 167 | spin_lock_irqsave(&runtime->lock, flags); |
f5beb598 | 168 | __reset_runtime_ptrs(runtime, is_input); |
1da177e4 | 169 | spin_unlock_irqrestore(&runtime->lock, flags); |
f5beb598 TI |
170 | } |
171 | ||
172 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) | |
173 | { | |
174 | snd_rawmidi_output_trigger(substream, 0); | |
175 | reset_runtime_ptrs(substream->runtime, false); | |
1da177e4 LT |
176 | return 0; |
177 | } | |
6776a5d7 | 178 | EXPORT_SYMBOL(snd_rawmidi_drop_output); |
1da177e4 | 179 | |
48c9d417 | 180 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
181 | { |
182 | int err; | |
183 | long timeout; | |
48c9d417 | 184 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
185 | |
186 | err = 0; | |
187 | runtime->drain = 1; | |
188 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
189 | (runtime->avail >= runtime->buffer_size), | |
190 | 10*HZ); | |
191 | if (signal_pending(current)) | |
192 | err = -ERESTARTSYS; | |
193 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
ca20d292 TI |
194 | rmidi_warn(substream->rmidi, |
195 | "rawmidi drain error (avail = %li, buffer_size = %li)\n", | |
196 | (long)runtime->avail, (long)runtime->buffer_size); | |
1da177e4 LT |
197 | err = -EIO; |
198 | } | |
199 | runtime->drain = 0; | |
200 | if (err != -ERESTARTSYS) { | |
201 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
202 | if (substream->ops->drain) | |
203 | substream->ops->drain(substream); | |
204 | else | |
205 | msleep(50); | |
206 | snd_rawmidi_drop_output(substream); | |
207 | } | |
208 | return err; | |
209 | } | |
6776a5d7 | 210 | EXPORT_SYMBOL(snd_rawmidi_drain_output); |
1da177e4 | 211 | |
48c9d417 | 212 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 | 213 | { |
1da177e4 | 214 | snd_rawmidi_input_trigger(substream, 0); |
f5beb598 | 215 | reset_runtime_ptrs(substream->runtime, true); |
1da177e4 LT |
216 | return 0; |
217 | } | |
6776a5d7 | 218 | EXPORT_SYMBOL(snd_rawmidi_drain_input); |
1da177e4 | 219 | |
9a1b64ca TI |
220 | /* look for an available substream for the given stream direction; |
221 | * if a specific subdevice is given, try to assign it | |
222 | */ | |
223 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
224 | int stream, int mode, | |
225 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 226 | { |
9a1b64ca TI |
227 | struct snd_rawmidi_substream *substream; |
228 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
229 | static unsigned int info_flags[2] = { | |
230 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, | |
231 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
232 | }; | |
1da177e4 | 233 | |
9a1b64ca | 234 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 235 | return -ENXIO; |
9a1b64ca TI |
236 | if (subdevice >= 0 && subdevice >= s->substream_count) |
237 | return -ENODEV; | |
9a1b64ca TI |
238 | |
239 | list_for_each_entry(substream, &s->substreams, list) { | |
240 | if (substream->opened) { | |
241 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
16fb1096 CL |
242 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
243 | !substream->append) | |
9a1b64ca TI |
244 | continue; |
245 | } | |
246 | if (subdevice < 0 || subdevice == substream->number) { | |
247 | *sub_ret = substream; | |
248 | return 0; | |
249 | } | |
1da177e4 | 250 | } |
9a1b64ca TI |
251 | return -EAGAIN; |
252 | } | |
f9d20283 | 253 | |
9a1b64ca TI |
254 | /* open and do ref-counting for the given substream */ |
255 | static int open_substream(struct snd_rawmidi *rmidi, | |
256 | struct snd_rawmidi_substream *substream, | |
257 | int mode) | |
258 | { | |
259 | int err; | |
260 | ||
8579d2d7 CL |
261 | if (substream->use_count == 0) { |
262 | err = snd_rawmidi_runtime_create(substream); | |
263 | if (err < 0) | |
264 | return err; | |
265 | err = substream->ops->open(substream); | |
b7fe750f CL |
266 | if (err < 0) { |
267 | snd_rawmidi_runtime_free(substream); | |
8579d2d7 | 268 | return err; |
b7fe750f | 269 | } |
8579d2d7 | 270 | substream->opened = 1; |
2d4b8420 | 271 | substream->active_sensing = 0; |
8579d2d7 CL |
272 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
273 | substream->append = 1; | |
7584af10 | 274 | substream->pid = get_pid(task_pid(current)); |
91d12c48 | 275 | rmidi->streams[substream->stream].substream_opened++; |
8579d2d7 CL |
276 | } |
277 | substream->use_count++; | |
9a1b64ca TI |
278 | return 0; |
279 | } | |
280 | ||
281 | static void close_substream(struct snd_rawmidi *rmidi, | |
282 | struct snd_rawmidi_substream *substream, | |
283 | int cleanup); | |
284 | ||
285 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
286 | struct snd_rawmidi_file *rfile) | |
287 | { | |
288 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
289 | int err; | |
290 | ||
291 | rfile->input = rfile->output = NULL; | |
1da177e4 | 292 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
293 | err = assign_substream(rmidi, subdevice, |
294 | SNDRV_RAWMIDI_STREAM_INPUT, | |
295 | mode, &sinput); | |
296 | if (err < 0) | |
b7fe750f | 297 | return err; |
1da177e4 LT |
298 | } |
299 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
300 | err = assign_substream(rmidi, subdevice, |
301 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
302 | mode, &soutput); | |
303 | if (err < 0) | |
b7fe750f | 304 | return err; |
1da177e4 | 305 | } |
9a1b64ca TI |
306 | |
307 | if (sinput) { | |
308 | err = open_substream(rmidi, sinput, mode); | |
309 | if (err < 0) | |
b7fe750f | 310 | return err; |
1da177e4 | 311 | } |
9a1b64ca TI |
312 | if (soutput) { |
313 | err = open_substream(rmidi, soutput, mode); | |
314 | if (err < 0) { | |
315 | if (sinput) | |
316 | close_substream(rmidi, sinput, 0); | |
b7fe750f | 317 | return err; |
1da177e4 | 318 | } |
1da177e4 | 319 | } |
9a1b64ca TI |
320 | |
321 | rfile->rmidi = rmidi; | |
322 | rfile->input = sinput; | |
323 | rfile->output = soutput; | |
1da177e4 | 324 | return 0; |
9a1b64ca TI |
325 | } |
326 | ||
327 | /* called from sound/core/seq/seq_midi.c */ | |
328 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
5bed9139 | 329 | int mode, struct snd_rawmidi_file *rfile) |
9a1b64ca TI |
330 | { |
331 | struct snd_rawmidi *rmidi; | |
7fdc9b08 | 332 | int err = 0; |
9a1b64ca TI |
333 | |
334 | if (snd_BUG_ON(!rfile)) | |
335 | return -EINVAL; | |
336 | ||
337 | mutex_lock(®ister_mutex); | |
338 | rmidi = snd_rawmidi_search(card, device); | |
7fdc9b08 TI |
339 | if (!rmidi) |
340 | err = -ENODEV; | |
341 | else if (!try_module_get(rmidi->card->module)) | |
342 | err = -ENXIO; | |
9a1b64ca | 343 | mutex_unlock(®ister_mutex); |
7fdc9b08 TI |
344 | if (err < 0) |
345 | return err; | |
9a1b64ca TI |
346 | |
347 | mutex_lock(&rmidi->open_mutex); | |
348 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
349 | mutex_unlock(&rmidi->open_mutex); | |
350 | if (err < 0) | |
351 | module_put(rmidi->card->module); | |
1da177e4 LT |
352 | return err; |
353 | } | |
6776a5d7 | 354 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
1da177e4 LT |
355 | |
356 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
357 | { | |
358 | int maj = imajor(inode); | |
48c9d417 | 359 | struct snd_card *card; |
f87135f5 | 360 | int subdevice; |
1da177e4 LT |
361 | unsigned short fflags; |
362 | int err; | |
48c9d417 | 363 | struct snd_rawmidi *rmidi; |
9a1b64ca | 364 | struct snd_rawmidi_file *rawmidi_file = NULL; |
ac6424b9 | 365 | wait_queue_entry_t wait; |
1da177e4 | 366 | |
5bed9139 | 367 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
9a1b64ca TI |
368 | return -EINVAL; /* invalid combination */ |
369 | ||
c5bf68fe | 370 | err = stream_open(inode, file); |
02f4865f TI |
371 | if (err < 0) |
372 | return err; | |
373 | ||
f1902860 | 374 | if (maj == snd_major) { |
f87135f5 CL |
375 | rmidi = snd_lookup_minor_data(iminor(inode), |
376 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 377 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 378 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
379 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
380 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 381 | #endif |
f1902860 | 382 | } else |
1da177e4 | 383 | return -ENXIO; |
1da177e4 | 384 | |
1da177e4 LT |
385 | if (rmidi == NULL) |
386 | return -ENODEV; | |
9a1b64ca | 387 | |
a0830dbd TI |
388 | if (!try_module_get(rmidi->card->module)) { |
389 | snd_card_unref(rmidi->card); | |
9a1b64ca | 390 | return -ENXIO; |
a0830dbd | 391 | } |
9a1b64ca TI |
392 | |
393 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
394 | card = rmidi->card; |
395 | err = snd_card_file_add(card, file); | |
396 | if (err < 0) | |
9a1b64ca | 397 | goto __error_card; |
1da177e4 | 398 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 399 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 400 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
401 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
402 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
403 | err = -ENOMEM; |
404 | goto __error; | |
1da177e4 LT |
405 | } |
406 | init_waitqueue_entry(&wait, current); | |
407 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 | 408 | while (1) { |
23c18d4b | 409 | subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI); |
9a1b64ca | 410 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
411 | if (err >= 0) |
412 | break; | |
413 | if (err == -EAGAIN) { | |
414 | if (file->f_flags & O_NONBLOCK) { | |
415 | err = -EBUSY; | |
416 | break; | |
417 | } | |
418 | } else | |
419 | break; | |
420 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 421 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 422 | schedule(); |
1a60d4c5 | 423 | mutex_lock(&rmidi->open_mutex); |
0914f796 TI |
424 | if (rmidi->card->shutdown) { |
425 | err = -ENODEV; | |
426 | break; | |
427 | } | |
1da177e4 LT |
428 | if (signal_pending(current)) { |
429 | err = -ERESTARTSYS; | |
430 | break; | |
431 | } | |
432 | } | |
9a1b64ca TI |
433 | remove_wait_queue(&rmidi->open_wait, &wait); |
434 | if (err < 0) { | |
435 | kfree(rawmidi_file); | |
436 | goto __error; | |
437 | } | |
1da177e4 LT |
438 | #ifdef CONFIG_SND_OSSEMUL |
439 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
440 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
441 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
442 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
443 | #endif | |
9a1b64ca TI |
444 | file->private_data = rawmidi_file; |
445 | mutex_unlock(&rmidi->open_mutex); | |
a0830dbd | 446 | snd_card_unref(rmidi->card); |
9a1b64ca TI |
447 | return 0; |
448 | ||
449 | __error: | |
450 | snd_card_file_remove(card, file); | |
451 | __error_card: | |
1a60d4c5 | 452 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 453 | module_put(rmidi->card->module); |
a0830dbd | 454 | snd_card_unref(rmidi->card); |
1da177e4 LT |
455 | return err; |
456 | } | |
457 | ||
9a1b64ca TI |
458 | static void close_substream(struct snd_rawmidi *rmidi, |
459 | struct snd_rawmidi_substream *substream, | |
460 | int cleanup) | |
1da177e4 | 461 | { |
9a1b64ca TI |
462 | if (--substream->use_count) |
463 | return; | |
1da177e4 | 464 | |
9a1b64ca TI |
465 | if (cleanup) { |
466 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
467 | snd_rawmidi_input_trigger(substream, 0); | |
468 | else { | |
1da177e4 LT |
469 | if (substream->active_sensing) { |
470 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
471 | /* sending single active sensing message |
472 | * to shut the device up | |
473 | */ | |
1da177e4 LT |
474 | snd_rawmidi_kernel_write(substream, &buf, 1); |
475 | } | |
476 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
477 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 478 | } |
1da177e4 | 479 | } |
9a1b64ca TI |
480 | substream->ops->close(substream); |
481 | if (substream->runtime->private_free) | |
482 | substream->runtime->private_free(substream); | |
483 | snd_rawmidi_runtime_free(substream); | |
484 | substream->opened = 0; | |
485 | substream->append = 0; | |
7584af10 CL |
486 | put_pid(substream->pid); |
487 | substream->pid = NULL; | |
91d12c48 | 488 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
489 | } |
490 | ||
491 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
492 | { | |
493 | struct snd_rawmidi *rmidi; | |
494 | ||
495 | rmidi = rfile->rmidi; | |
496 | mutex_lock(&rmidi->open_mutex); | |
497 | if (rfile->input) { | |
498 | close_substream(rmidi, rfile->input, 1); | |
499 | rfile->input = NULL; | |
500 | } | |
501 | if (rfile->output) { | |
502 | close_substream(rmidi, rfile->output, 1); | |
503 | rfile->output = NULL; | |
504 | } | |
505 | rfile->rmidi = NULL; | |
1a60d4c5 | 506 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
507 | wake_up(&rmidi->open_wait); |
508 | } | |
509 | ||
510 | /* called from sound/core/seq/seq_midi.c */ | |
511 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
512 | { | |
513 | struct snd_rawmidi *rmidi; | |
514 | ||
515 | if (snd_BUG_ON(!rfile)) | |
516 | return -ENXIO; | |
5bed9139 | 517 | |
9a1b64ca TI |
518 | rmidi = rfile->rmidi; |
519 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
520 | module_put(rmidi->card->module); |
521 | return 0; | |
522 | } | |
6776a5d7 | 523 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
1da177e4 LT |
524 | |
525 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
526 | { | |
48c9d417 TI |
527 | struct snd_rawmidi_file *rfile; |
528 | struct snd_rawmidi *rmidi; | |
aa73aec6 | 529 | struct module *module; |
1da177e4 LT |
530 | |
531 | rfile = file->private_data; | |
1da177e4 | 532 | rmidi = rfile->rmidi; |
9a1b64ca | 533 | rawmidi_release_priv(rfile); |
1da177e4 | 534 | kfree(rfile); |
aa73aec6 | 535 | module = rmidi->card->module; |
1da177e4 | 536 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 537 | module_put(module); |
9a1b64ca | 538 | return 0; |
1da177e4 LT |
539 | } |
540 | ||
18612048 AB |
541 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
542 | struct snd_rawmidi_info *info) | |
1da177e4 | 543 | { |
48c9d417 | 544 | struct snd_rawmidi *rmidi; |
5bed9139 | 545 | |
1da177e4 LT |
546 | if (substream == NULL) |
547 | return -ENODEV; | |
548 | rmidi = substream->rmidi; | |
549 | memset(info, 0, sizeof(*info)); | |
550 | info->card = rmidi->card->number; | |
551 | info->device = rmidi->device; | |
552 | info->subdevice = substream->number; | |
553 | info->stream = substream->stream; | |
554 | info->flags = rmidi->info_flags; | |
555 | strcpy(info->id, rmidi->id); | |
556 | strcpy(info->name, rmidi->name); | |
557 | strcpy(info->subname, substream->name); | |
558 | info->subdevices_count = substream->pstr->substream_count; | |
559 | info->subdevices_avail = (substream->pstr->substream_count - | |
560 | substream->pstr->substream_opened); | |
561 | return 0; | |
562 | } | |
563 | ||
48c9d417 | 564 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
5bed9139 | 565 | struct snd_rawmidi_info __user *_info) |
1da177e4 | 566 | { |
48c9d417 | 567 | struct snd_rawmidi_info info; |
1da177e4 | 568 | int err; |
5bed9139 TI |
569 | |
570 | err = snd_rawmidi_info(substream, &info); | |
571 | if (err < 0) | |
1da177e4 | 572 | return err; |
48c9d417 | 573 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
574 | return -EFAULT; |
575 | return 0; | |
576 | } | |
577 | ||
c1cfd902 TI |
578 | static int __snd_rawmidi_info_select(struct snd_card *card, |
579 | struct snd_rawmidi_info *info) | |
1da177e4 | 580 | { |
48c9d417 TI |
581 | struct snd_rawmidi *rmidi; |
582 | struct snd_rawmidi_str *pstr; | |
583 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 584 | |
f87135f5 | 585 | rmidi = snd_rawmidi_search(card, info->device); |
a106cd3d CL |
586 | if (!rmidi) |
587 | return -ENXIO; | |
1da177e4 LT |
588 | if (info->stream < 0 || info->stream > 1) |
589 | return -EINVAL; | |
2b1d9c8f | 590 | info->stream = array_index_nospec(info->stream, 2); |
1da177e4 LT |
591 | pstr = &rmidi->streams[info->stream]; |
592 | if (pstr->substream_count == 0) | |
593 | return -ENOENT; | |
594 | if (info->subdevice >= pstr->substream_count) | |
595 | return -ENXIO; | |
9244b2c3 | 596 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
597 | if ((unsigned int)substream->number == info->subdevice) |
598 | return snd_rawmidi_info(substream, info); | |
599 | } | |
600 | return -ENXIO; | |
601 | } | |
c1cfd902 TI |
602 | |
603 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) | |
604 | { | |
605 | int ret; | |
606 | ||
607 | mutex_lock(®ister_mutex); | |
608 | ret = __snd_rawmidi_info_select(card, info); | |
609 | mutex_unlock(®ister_mutex); | |
610 | return ret; | |
611 | } | |
6776a5d7 | 612 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1da177e4 | 613 | |
48c9d417 TI |
614 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
615 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
616 | { |
617 | int err; | |
48c9d417 | 618 | struct snd_rawmidi_info info; |
5bed9139 | 619 | |
1da177e4 LT |
620 | if (get_user(info.device, &_info->device)) |
621 | return -EFAULT; | |
622 | if (get_user(info.stream, &_info->stream)) | |
623 | return -EFAULT; | |
624 | if (get_user(info.subdevice, &_info->subdevice)) | |
625 | return -EFAULT; | |
5bed9139 TI |
626 | err = snd_rawmidi_info_select(card, &info); |
627 | if (err < 0) | |
1da177e4 | 628 | return err; |
48c9d417 | 629 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
630 | return -EFAULT; |
631 | return 0; | |
632 | } | |
633 | ||
f5beb598 TI |
634 | static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime, |
635 | struct snd_rawmidi_params *params, | |
636 | bool is_input) | |
1da177e4 | 637 | { |
39675f7a | 638 | char *newbuf, *oldbuf; |
5bed9139 | 639 | |
5bed9139 | 640 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) |
1da177e4 | 641 | return -EINVAL; |
5bed9139 | 642 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) |
1da177e4 | 643 | return -EINVAL; |
1da177e4 | 644 | if (params->buffer_size != runtime->buffer_size) { |
5a7b44a8 | 645 | newbuf = kvzalloc(params->buffer_size, GFP_KERNEL); |
4fa95ef6 | 646 | if (!newbuf) |
1da177e4 | 647 | return -ENOMEM; |
39675f7a TI |
648 | spin_lock_irq(&runtime->lock); |
649 | oldbuf = runtime->buffer; | |
1da177e4 LT |
650 | runtime->buffer = newbuf; |
651 | runtime->buffer_size = params->buffer_size; | |
f5beb598 | 652 | __reset_runtime_ptrs(runtime, is_input); |
39675f7a | 653 | spin_unlock_irq(&runtime->lock); |
ef4db239 | 654 | kvfree(oldbuf); |
1da177e4 LT |
655 | } |
656 | runtime->avail_min = params->avail_min; | |
1da177e4 LT |
657 | return 0; |
658 | } | |
f5beb598 TI |
659 | |
660 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, | |
661 | struct snd_rawmidi_params *params) | |
662 | { | |
663 | if (substream->append && substream->use_count > 1) | |
664 | return -EBUSY; | |
665 | snd_rawmidi_drain_output(substream); | |
666 | substream->active_sensing = !params->no_active_sensing; | |
667 | return resize_runtime_buffer(substream->runtime, params, false); | |
668 | } | |
6776a5d7 | 669 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1da177e4 | 670 | |
48c9d417 | 671 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
5bed9139 | 672 | struct snd_rawmidi_params *params) |
1da177e4 | 673 | { |
1da177e4 | 674 | snd_rawmidi_drain_input(substream); |
f5beb598 | 675 | return resize_runtime_buffer(substream->runtime, params, true); |
1da177e4 | 676 | } |
6776a5d7 | 677 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1da177e4 | 678 | |
48c9d417 | 679 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
5bed9139 | 680 | struct snd_rawmidi_status *status) |
1da177e4 | 681 | { |
48c9d417 | 682 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
683 | |
684 | memset(status, 0, sizeof(*status)); | |
685 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
686 | spin_lock_irq(&runtime->lock); | |
687 | status->avail = runtime->avail; | |
688 | spin_unlock_irq(&runtime->lock); | |
689 | return 0; | |
690 | } | |
691 | ||
48c9d417 | 692 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
5bed9139 | 693 | struct snd_rawmidi_status *status) |
1da177e4 | 694 | { |
48c9d417 | 695 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
696 | |
697 | memset(status, 0, sizeof(*status)); | |
698 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
699 | spin_lock_irq(&runtime->lock); | |
700 | status->avail = runtime->avail; | |
701 | status->xruns = runtime->xruns; | |
702 | runtime->xruns = 0; | |
703 | spin_unlock_irq(&runtime->lock); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
708 | { | |
48c9d417 | 709 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
710 | void __user *argp = (void __user *)arg; |
711 | ||
712 | rfile = file->private_data; | |
713 | if (((cmd >> 8) & 0xff) != 'W') | |
714 | return -ENOTTY; | |
715 | switch (cmd) { | |
716 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
717 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
718 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
719 | { | |
48c9d417 TI |
720 | int stream; |
721 | struct snd_rawmidi_info __user *info = argp; | |
5bed9139 | 722 | |
1da177e4 LT |
723 | if (get_user(stream, &info->stream)) |
724 | return -EFAULT; | |
725 | switch (stream) { | |
726 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
727 | return snd_rawmidi_info_user(rfile->input, info); | |
728 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
729 | return snd_rawmidi_info_user(rfile->output, info); | |
730 | default: | |
731 | return -EINVAL; | |
732 | } | |
733 | } | |
734 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
735 | { | |
48c9d417 | 736 | struct snd_rawmidi_params params; |
5bed9139 | 737 | |
48c9d417 | 738 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) |
1da177e4 LT |
739 | return -EFAULT; |
740 | switch (params.stream) { | |
741 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
742 | if (rfile->output == NULL) | |
743 | return -EINVAL; | |
744 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
745 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
746 | if (rfile->input == NULL) | |
747 | return -EINVAL; | |
748 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
749 | default: | |
750 | return -EINVAL; | |
751 | } | |
752 | } | |
753 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
754 | { | |
755 | int err = 0; | |
48c9d417 | 756 | struct snd_rawmidi_status status; |
5bed9139 | 757 | |
48c9d417 | 758 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
759 | return -EFAULT; |
760 | switch (status.stream) { | |
761 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
762 | if (rfile->output == NULL) | |
763 | return -EINVAL; | |
764 | err = snd_rawmidi_output_status(rfile->output, &status); | |
765 | break; | |
766 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
767 | if (rfile->input == NULL) | |
768 | return -EINVAL; | |
769 | err = snd_rawmidi_input_status(rfile->input, &status); | |
770 | break; | |
771 | default: | |
772 | return -EINVAL; | |
773 | } | |
774 | if (err < 0) | |
775 | return err; | |
48c9d417 | 776 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
777 | return -EFAULT; |
778 | return 0; | |
779 | } | |
780 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
781 | { | |
782 | int val; | |
5bed9139 | 783 | |
1da177e4 LT |
784 | if (get_user(val, (int __user *) argp)) |
785 | return -EFAULT; | |
786 | switch (val) { | |
787 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
788 | if (rfile->output == NULL) | |
789 | return -EINVAL; | |
790 | return snd_rawmidi_drop_output(rfile->output); | |
791 | default: | |
792 | return -EINVAL; | |
793 | } | |
794 | } | |
795 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
796 | { | |
797 | int val; | |
5bed9139 | 798 | |
1da177e4 LT |
799 | if (get_user(val, (int __user *) argp)) |
800 | return -EFAULT; | |
801 | switch (val) { | |
802 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
803 | if (rfile->output == NULL) | |
804 | return -EINVAL; | |
805 | return snd_rawmidi_drain_output(rfile->output); | |
806 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
807 | if (rfile->input == NULL) | |
808 | return -EINVAL; | |
809 | return snd_rawmidi_drain_input(rfile->input); | |
810 | default: | |
811 | return -EINVAL; | |
812 | } | |
813 | } | |
1da177e4 | 814 | default: |
ca20d292 TI |
815 | rmidi_dbg(rfile->rmidi, |
816 | "rawmidi: unknown command = 0x%x\n", cmd); | |
1da177e4 LT |
817 | } |
818 | return -ENOTTY; | |
819 | } | |
820 | ||
48c9d417 TI |
821 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
822 | struct snd_ctl_file *control, | |
1da177e4 LT |
823 | unsigned int cmd, |
824 | unsigned long arg) | |
825 | { | |
826 | void __user *argp = (void __user *)arg; | |
1da177e4 | 827 | |
1da177e4 LT |
828 | switch (cmd) { |
829 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
830 | { | |
831 | int device; | |
5bed9139 | 832 | |
1da177e4 LT |
833 | if (get_user(device, (int __user *)argp)) |
834 | return -EFAULT; | |
a7a13d06 DC |
835 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
836 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 837 | mutex_lock(®ister_mutex); |
1da177e4 LT |
838 | device = device < 0 ? 0 : device + 1; |
839 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 840 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
841 | break; |
842 | device++; | |
843 | } | |
844 | if (device == SNDRV_RAWMIDI_DEVICES) | |
845 | device = -1; | |
1a60d4c5 | 846 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
847 | if (put_user(device, (int __user *)argp)) |
848 | return -EFAULT; | |
849 | return 0; | |
850 | } | |
851 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
852 | { | |
853 | int val; | |
5bed9139 | 854 | |
1da177e4 LT |
855 | if (get_user(val, (int __user *)argp)) |
856 | return -EFAULT; | |
23c18d4b | 857 | control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val; |
1da177e4 LT |
858 | return 0; |
859 | } | |
860 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
861 | return snd_rawmidi_info_select_user(card, argp); | |
862 | } | |
863 | return -ENOIOCTLCMD; | |
864 | } | |
865 | ||
866 | /** | |
867 | * snd_rawmidi_receive - receive the input data from the device | |
868 | * @substream: the rawmidi substream | |
869 | * @buffer: the buffer pointer | |
870 | * @count: the data size to read | |
871 | * | |
872 | * Reads the data from the internal buffer. | |
873 | * | |
eb7c06e8 | 874 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 875 | */ |
48c9d417 TI |
876 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
877 | const unsigned char *buffer, int count) | |
1da177e4 LT |
878 | { |
879 | unsigned long flags; | |
880 | int result = 0, count1; | |
48c9d417 | 881 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 882 | |
219df32f TI |
883 | if (!substream->opened) |
884 | return -EBADFD; | |
1da177e4 | 885 | if (runtime->buffer == NULL) { |
ca20d292 TI |
886 | rmidi_dbg(substream->rmidi, |
887 | "snd_rawmidi_receive: input is not active!!!\n"); | |
1da177e4 LT |
888 | return -EINVAL; |
889 | } | |
890 | spin_lock_irqsave(&runtime->lock, flags); | |
891 | if (count == 1) { /* special case, faster code */ | |
892 | substream->bytes++; | |
893 | if (runtime->avail < runtime->buffer_size) { | |
894 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
895 | runtime->hw_ptr %= runtime->buffer_size; | |
896 | runtime->avail++; | |
897 | result++; | |
898 | } else { | |
899 | runtime->xruns++; | |
900 | } | |
901 | } else { | |
902 | substream->bytes += count; | |
903 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
904 | if (count1 > count) | |
905 | count1 = count; | |
906 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
907 | count1 = runtime->buffer_size - runtime->avail; | |
908 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
909 | runtime->hw_ptr += count1; | |
910 | runtime->hw_ptr %= runtime->buffer_size; | |
911 | runtime->avail += count1; | |
912 | count -= count1; | |
913 | result += count1; | |
914 | if (count > 0) { | |
915 | buffer += count1; | |
916 | count1 = count; | |
917 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
918 | count1 = runtime->buffer_size - runtime->avail; | |
919 | runtime->xruns += count - count1; | |
920 | } | |
921 | if (count1 > 0) { | |
922 | memcpy(runtime->buffer, buffer, count1); | |
923 | runtime->hw_ptr = count1; | |
924 | runtime->avail += count1; | |
925 | result += count1; | |
926 | } | |
927 | } | |
928 | } | |
929 | if (result > 0) { | |
930 | if (runtime->event) | |
b3c705aa | 931 | schedule_work(&runtime->event_work); |
1da177e4 LT |
932 | else if (snd_rawmidi_ready(substream)) |
933 | wake_up(&runtime->sleep); | |
934 | } | |
935 | spin_unlock_irqrestore(&runtime->lock, flags); | |
936 | return result; | |
937 | } | |
6776a5d7 | 938 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1da177e4 | 939 | |
48c9d417 | 940 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
941 | unsigned char __user *userbuf, |
942 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
943 | { |
944 | unsigned long flags; | |
945 | long result = 0, count1; | |
48c9d417 | 946 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 947 | unsigned long appl_ptr; |
1da177e4 | 948 | |
81f57754 | 949 | spin_lock_irqsave(&runtime->lock, flags); |
1da177e4 LT |
950 | while (count > 0 && runtime->avail) { |
951 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
952 | if (count1 > count) | |
953 | count1 = count; | |
1da177e4 LT |
954 | if (count1 > (int)runtime->avail) |
955 | count1 = runtime->avail; | |
81f57754 TI |
956 | |
957 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
958 | appl_ptr = runtime->appl_ptr; | |
959 | runtime->appl_ptr += count1; | |
960 | runtime->appl_ptr %= runtime->buffer_size; | |
961 | runtime->avail -= count1; | |
962 | ||
17596a80 | 963 | if (kernelbuf) |
81f57754 | 964 | memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1); |
17596a80 | 965 | if (userbuf) { |
1da177e4 | 966 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 967 | if (copy_to_user(userbuf + result, |
81f57754 | 968 | runtime->buffer + appl_ptr, count1)) { |
1da177e4 LT |
969 | return result > 0 ? result : -EFAULT; |
970 | } | |
971 | spin_lock_irqsave(&runtime->lock, flags); | |
972 | } | |
1da177e4 LT |
973 | result += count1; |
974 | count -= count1; | |
975 | } | |
81f57754 | 976 | spin_unlock_irqrestore(&runtime->lock, flags); |
1da177e4 LT |
977 | return result; |
978 | } | |
979 | ||
48c9d417 TI |
980 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
981 | unsigned char *buf, long count) | |
1da177e4 LT |
982 | { |
983 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 984 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 | 985 | } |
6776a5d7 | 986 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1da177e4 | 987 | |
48c9d417 TI |
988 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
989 | loff_t *offset) | |
1da177e4 LT |
990 | { |
991 | long result; | |
992 | int count1; | |
48c9d417 TI |
993 | struct snd_rawmidi_file *rfile; |
994 | struct snd_rawmidi_substream *substream; | |
995 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
996 | |
997 | rfile = file->private_data; | |
998 | substream = rfile->input; | |
999 | if (substream == NULL) | |
1000 | return -EIO; | |
1001 | runtime = substream->runtime; | |
1002 | snd_rawmidi_input_trigger(substream, 1); | |
1003 | result = 0; | |
1004 | while (count > 0) { | |
1005 | spin_lock_irq(&runtime->lock); | |
1006 | while (!snd_rawmidi_ready(substream)) { | |
ac6424b9 | 1007 | wait_queue_entry_t wait; |
5bed9139 | 1008 | |
1da177e4 LT |
1009 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
1010 | spin_unlock_irq(&runtime->lock); | |
1011 | return result > 0 ? result : -EAGAIN; | |
1012 | } | |
1013 | init_waitqueue_entry(&wait, current); | |
1014 | add_wait_queue(&runtime->sleep, &wait); | |
1015 | set_current_state(TASK_INTERRUPTIBLE); | |
1016 | spin_unlock_irq(&runtime->lock); | |
1017 | schedule(); | |
1018 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1019 | if (rfile->rmidi->card->shutdown) |
1020 | return -ENODEV; | |
1da177e4 LT |
1021 | if (signal_pending(current)) |
1022 | return result > 0 ? result : -ERESTARTSYS; | |
1023 | if (!runtime->avail) | |
1024 | return result > 0 ? result : -EIO; | |
1025 | spin_lock_irq(&runtime->lock); | |
1026 | } | |
1027 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1028 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1029 | (unsigned char __user *)buf, |
1030 | NULL/*kernelbuf*/, | |
1031 | count); | |
1da177e4 LT |
1032 | if (count1 < 0) |
1033 | return result > 0 ? result : count1; | |
1034 | result += count1; | |
1035 | buf += count1; | |
1036 | count -= count1; | |
1037 | } | |
1038 | return result; | |
1039 | } | |
1040 | ||
1041 | /** | |
1042 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1043 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1044 | * |
1045 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1046 | */ |
48c9d417 | 1047 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1048 | { |
48c9d417 | 1049 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1050 | int result; |
1051 | unsigned long flags; | |
1052 | ||
1053 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1054 | rmidi_dbg(substream->rmidi, |
1055 | "snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1da177e4 LT |
1056 | return 1; |
1057 | } | |
1058 | spin_lock_irqsave(&runtime->lock, flags); | |
1059 | result = runtime->avail >= runtime->buffer_size; | |
1060 | spin_unlock_irqrestore(&runtime->lock, flags); | |
5bed9139 | 1061 | return result; |
1da177e4 | 1062 | } |
6776a5d7 | 1063 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1da177e4 LT |
1064 | |
1065 | /** | |
06ab3003 | 1066 | * __snd_rawmidi_transmit_peek - copy data from the internal buffer |
1da177e4 LT |
1067 | * @substream: the rawmidi substream |
1068 | * @buffer: the buffer pointer | |
1069 | * @count: data size to transfer | |
1070 | * | |
06ab3003 | 1071 | * This is a variant of snd_rawmidi_transmit_peek() without spinlock. |
1da177e4 | 1072 | */ |
06ab3003 | 1073 | int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
48c9d417 | 1074 | unsigned char *buffer, int count) |
1da177e4 | 1075 | { |
1da177e4 | 1076 | int result, count1; |
48c9d417 | 1077 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1078 | |
1079 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1080 | rmidi_dbg(substream->rmidi, |
1081 | "snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1da177e4 LT |
1082 | return -EINVAL; |
1083 | } | |
1084 | result = 0; | |
1da177e4 LT |
1085 | if (runtime->avail >= runtime->buffer_size) { |
1086 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1087 | goto __skip; | |
1088 | } | |
1089 | if (count == 1) { /* special case, faster code */ | |
1090 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1091 | result++; | |
1092 | } else { | |
1093 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1094 | if (count1 > count) | |
1095 | count1 = count; | |
1096 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1097 | count1 = runtime->buffer_size - runtime->avail; | |
1098 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1099 | count -= count1; | |
1100 | result += count1; | |
1101 | if (count > 0) { | |
1102 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1103 | count = runtime->buffer_size - runtime->avail - count1; | |
1104 | memcpy(buffer + count1, runtime->buffer, count); | |
1105 | result += count; | |
1106 | } | |
1107 | } | |
1108 | __skip: | |
06ab3003 TI |
1109 | return result; |
1110 | } | |
1111 | EXPORT_SYMBOL(__snd_rawmidi_transmit_peek); | |
1112 | ||
1113 | /** | |
1114 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1115 | * @substream: the rawmidi substream | |
1116 | * @buffer: the buffer pointer | |
1117 | * @count: data size to transfer | |
1118 | * | |
1119 | * Copies data from the internal output buffer to the given buffer. | |
1120 | * | |
1121 | * Call this in the interrupt handler when the midi output is ready, | |
1122 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1123 | * finished. | |
1124 | * | |
1125 | * Return: The size of copied data, or a negative error code on failure. | |
1126 | */ | |
1127 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, | |
1128 | unsigned char *buffer, int count) | |
1129 | { | |
1130 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1131 | int result; | |
1132 | unsigned long flags; | |
1133 | ||
1134 | spin_lock_irqsave(&runtime->lock, flags); | |
1135 | result = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1da177e4 LT |
1136 | spin_unlock_irqrestore(&runtime->lock, flags); |
1137 | return result; | |
1138 | } | |
6776a5d7 | 1139 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1da177e4 LT |
1140 | |
1141 | /** | |
06ab3003 | 1142 | * __snd_rawmidi_transmit_ack - acknowledge the transmission |
1da177e4 | 1143 | * @substream: the rawmidi substream |
0a11458c | 1144 | * @count: the transferred count |
1da177e4 | 1145 | * |
06ab3003 | 1146 | * This is a variant of __snd_rawmidi_transmit_ack() without spinlock. |
1da177e4 | 1147 | */ |
06ab3003 | 1148 | int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 | 1149 | { |
48c9d417 | 1150 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1151 | |
1152 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1153 | rmidi_dbg(substream->rmidi, |
1154 | "snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1da177e4 LT |
1155 | return -EINVAL; |
1156 | } | |
7eaa943c | 1157 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1158 | runtime->hw_ptr += count; |
1159 | runtime->hw_ptr %= runtime->buffer_size; | |
1160 | runtime->avail += count; | |
1161 | substream->bytes += count; | |
1162 | if (count > 0) { | |
1163 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1164 | wake_up(&runtime->sleep); | |
1165 | } | |
1da177e4 LT |
1166 | return count; |
1167 | } | |
06ab3003 TI |
1168 | EXPORT_SYMBOL(__snd_rawmidi_transmit_ack); |
1169 | ||
1170 | /** | |
1171 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1172 | * @substream: the rawmidi substream | |
1173 | * @count: the transferred count | |
1174 | * | |
1175 | * Advances the hardware pointer for the internal output buffer with | |
1176 | * the given size and updates the condition. | |
1177 | * Call after the transmission is finished. | |
1178 | * | |
1179 | * Return: The advanced size if successful, or a negative error code on failure. | |
1180 | */ | |
1181 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) | |
1182 | { | |
1183 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1184 | int result; | |
1185 | unsigned long flags; | |
1186 | ||
1187 | spin_lock_irqsave(&runtime->lock, flags); | |
1188 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1189 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1190 | return result; | |
1191 | } | |
6776a5d7 | 1192 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1da177e4 LT |
1193 | |
1194 | /** | |
1195 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1196 | * @substream: the rawmidi substream | |
df8db936 | 1197 | * @buffer: the buffer pointer |
1da177e4 | 1198 | * @count: the data size to transfer |
5bed9139 | 1199 | * |
1da177e4 LT |
1200 | * Copies data from the buffer to the device and advances the pointer. |
1201 | * | |
eb7c06e8 | 1202 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1203 | */ |
48c9d417 TI |
1204 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1205 | unsigned char *buffer, int count) | |
1da177e4 | 1206 | { |
06ab3003 TI |
1207 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1208 | int result; | |
1209 | unsigned long flags; | |
1210 | ||
1211 | spin_lock_irqsave(&runtime->lock, flags); | |
219df32f | 1212 | if (!substream->opened) |
06ab3003 TI |
1213 | result = -EBADFD; |
1214 | else { | |
1215 | count = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1216 | if (count <= 0) | |
1217 | result = count; | |
1218 | else | |
1219 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1220 | } | |
1221 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1222 | return result; | |
1da177e4 | 1223 | } |
6776a5d7 | 1224 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1da177e4 | 1225 | |
6aea5702 TI |
1226 | /** |
1227 | * snd_rawmidi_proceed - Discard the all pending bytes and proceed | |
1228 | * @substream: rawmidi substream | |
1229 | * | |
1230 | * Return: the number of discarded bytes | |
1231 | */ | |
1232 | int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream) | |
1233 | { | |
1234 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1235 | unsigned long flags; | |
1236 | int count = 0; | |
1237 | ||
1238 | spin_lock_irqsave(&runtime->lock, flags); | |
1239 | if (runtime->avail < runtime->buffer_size) { | |
1240 | count = runtime->buffer_size - runtime->avail; | |
1241 | __snd_rawmidi_transmit_ack(substream, count); | |
1242 | } | |
1243 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1244 | return count; | |
1245 | } | |
1246 | EXPORT_SYMBOL(snd_rawmidi_proceed); | |
1247 | ||
48c9d417 | 1248 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1249 | const unsigned char __user *userbuf, |
1250 | const unsigned char *kernelbuf, | |
1251 | long count) | |
1da177e4 LT |
1252 | { |
1253 | unsigned long flags; | |
1254 | long count1, result; | |
48c9d417 | 1255 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 1256 | unsigned long appl_ptr; |
1da177e4 | 1257 | |
cc85f7a6 | 1258 | if (!kernelbuf && !userbuf) |
7eaa943c TI |
1259 | return -EINVAL; |
1260 | if (snd_BUG_ON(!runtime->buffer)) | |
1261 | return -EINVAL; | |
1da177e4 LT |
1262 | |
1263 | result = 0; | |
1264 | spin_lock_irqsave(&runtime->lock, flags); | |
1265 | if (substream->append) { | |
1266 | if ((long)runtime->avail < count) { | |
1267 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1268 | return -EAGAIN; | |
1269 | } | |
1270 | } | |
1271 | while (count > 0 && runtime->avail > 0) { | |
1272 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1273 | if (count1 > count) | |
1274 | count1 = count; | |
1275 | if (count1 > (long)runtime->avail) | |
1276 | count1 = runtime->avail; | |
81f57754 TI |
1277 | |
1278 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
1279 | appl_ptr = runtime->appl_ptr; | |
1280 | runtime->appl_ptr += count1; | |
1281 | runtime->appl_ptr %= runtime->buffer_size; | |
1282 | runtime->avail -= count1; | |
1283 | ||
17596a80 | 1284 | if (kernelbuf) |
81f57754 | 1285 | memcpy(runtime->buffer + appl_ptr, |
17596a80 MÅš |
1286 | kernelbuf + result, count1); |
1287 | else if (userbuf) { | |
1da177e4 | 1288 | spin_unlock_irqrestore(&runtime->lock, flags); |
81f57754 | 1289 | if (copy_from_user(runtime->buffer + appl_ptr, |
17596a80 | 1290 | userbuf + result, count1)) { |
1da177e4 LT |
1291 | spin_lock_irqsave(&runtime->lock, flags); |
1292 | result = result > 0 ? result : -EFAULT; | |
1293 | goto __end; | |
1294 | } | |
1295 | spin_lock_irqsave(&runtime->lock, flags); | |
1296 | } | |
1da177e4 | 1297 | result += count1; |
1da177e4 LT |
1298 | count -= count1; |
1299 | } | |
1300 | __end: | |
1301 | count1 = runtime->avail < runtime->buffer_size; | |
1302 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1303 | if (count1) | |
1304 | snd_rawmidi_output_trigger(substream, 1); | |
1305 | return result; | |
1306 | } | |
1307 | ||
48c9d417 TI |
1308 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1309 | const unsigned char *buf, long count) | |
1da177e4 | 1310 | { |
17596a80 | 1311 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 | 1312 | } |
6776a5d7 | 1313 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1da177e4 | 1314 | |
48c9d417 TI |
1315 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1316 | size_t count, loff_t *offset) | |
1da177e4 LT |
1317 | { |
1318 | long result, timeout; | |
1319 | int count1; | |
48c9d417 TI |
1320 | struct snd_rawmidi_file *rfile; |
1321 | struct snd_rawmidi_runtime *runtime; | |
1322 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1323 | |
1324 | rfile = file->private_data; | |
1325 | substream = rfile->output; | |
1326 | runtime = substream->runtime; | |
1327 | /* we cannot put an atomic message to our buffer */ | |
1328 | if (substream->append && count > runtime->buffer_size) | |
1329 | return -EIO; | |
1330 | result = 0; | |
1331 | while (count > 0) { | |
1332 | spin_lock_irq(&runtime->lock); | |
1333 | while (!snd_rawmidi_ready_append(substream, count)) { | |
ac6424b9 | 1334 | wait_queue_entry_t wait; |
5bed9139 | 1335 | |
1da177e4 LT |
1336 | if (file->f_flags & O_NONBLOCK) { |
1337 | spin_unlock_irq(&runtime->lock); | |
1338 | return result > 0 ? result : -EAGAIN; | |
1339 | } | |
1340 | init_waitqueue_entry(&wait, current); | |
1341 | add_wait_queue(&runtime->sleep, &wait); | |
1342 | set_current_state(TASK_INTERRUPTIBLE); | |
1343 | spin_unlock_irq(&runtime->lock); | |
1344 | timeout = schedule_timeout(30 * HZ); | |
1345 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1346 | if (rfile->rmidi->card->shutdown) |
1347 | return -ENODEV; | |
1da177e4 LT |
1348 | if (signal_pending(current)) |
1349 | return result > 0 ? result : -ERESTARTSYS; | |
1350 | if (!runtime->avail && !timeout) | |
1351 | return result > 0 ? result : -EIO; | |
1352 | spin_lock_irq(&runtime->lock); | |
1353 | } | |
1354 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1355 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1356 | if (count1 < 0) |
1357 | return result > 0 ? result : count1; | |
1358 | result += count1; | |
1359 | buf += count1; | |
1360 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1361 | break; | |
1362 | count -= count1; | |
1363 | } | |
6b2f3d1f | 1364 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1365 | spin_lock_irq(&runtime->lock); |
1366 | while (runtime->avail != runtime->buffer_size) { | |
ac6424b9 | 1367 | wait_queue_entry_t wait; |
1da177e4 | 1368 | unsigned int last_avail = runtime->avail; |
5bed9139 | 1369 | |
1da177e4 LT |
1370 | init_waitqueue_entry(&wait, current); |
1371 | add_wait_queue(&runtime->sleep, &wait); | |
1372 | set_current_state(TASK_INTERRUPTIBLE); | |
1373 | spin_unlock_irq(&runtime->lock); | |
1374 | timeout = schedule_timeout(30 * HZ); | |
1375 | remove_wait_queue(&runtime->sleep, &wait); | |
1376 | if (signal_pending(current)) | |
1377 | return result > 0 ? result : -ERESTARTSYS; | |
1378 | if (runtime->avail == last_avail && !timeout) | |
1379 | return result > 0 ? result : -EIO; | |
1380 | spin_lock_irq(&runtime->lock); | |
1381 | } | |
1382 | spin_unlock_irq(&runtime->lock); | |
1383 | } | |
1384 | return result; | |
1385 | } | |
1386 | ||
5bed9139 | 1387 | static __poll_t snd_rawmidi_poll(struct file *file, poll_table *wait) |
1da177e4 | 1388 | { |
48c9d417 TI |
1389 | struct snd_rawmidi_file *rfile; |
1390 | struct snd_rawmidi_runtime *runtime; | |
680ef72a | 1391 | __poll_t mask; |
1da177e4 LT |
1392 | |
1393 | rfile = file->private_data; | |
1394 | if (rfile->input != NULL) { | |
1395 | runtime = rfile->input->runtime; | |
1396 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1397 | poll_wait(file, &runtime->sleep, wait); | |
1398 | } | |
1399 | if (rfile->output != NULL) { | |
1400 | runtime = rfile->output->runtime; | |
1401 | poll_wait(file, &runtime->sleep, wait); | |
1402 | } | |
1403 | mask = 0; | |
1404 | if (rfile->input != NULL) { | |
1405 | if (snd_rawmidi_ready(rfile->input)) | |
a9a08845 | 1406 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
1407 | } |
1408 | if (rfile->output != NULL) { | |
1409 | if (snd_rawmidi_ready(rfile->output)) | |
a9a08845 | 1410 | mask |= EPOLLOUT | EPOLLWRNORM; |
1da177e4 LT |
1411 | } |
1412 | return mask; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | */ | |
1417 | #ifdef CONFIG_COMPAT | |
1418 | #include "rawmidi_compat.c" | |
1419 | #else | |
1420 | #define snd_rawmidi_ioctl_compat NULL | |
1421 | #endif | |
1422 | ||
1423 | /* | |
1da177e4 LT |
1424 | */ |
1425 | ||
48c9d417 TI |
1426 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1427 | struct snd_info_buffer *buffer) | |
1da177e4 | 1428 | { |
48c9d417 TI |
1429 | struct snd_rawmidi *rmidi; |
1430 | struct snd_rawmidi_substream *substream; | |
1431 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1432 | |
1433 | rmidi = entry->private_data; | |
1434 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1435 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1436 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1437 | list_for_each_entry(substream, |
1438 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1439 | list) { | |
1da177e4 LT |
1440 | snd_iprintf(buffer, |
1441 | "Output %d\n" | |
1442 | " Tx bytes : %lu\n", | |
1443 | substream->number, | |
1444 | (unsigned long) substream->bytes); | |
1445 | if (substream->opened) { | |
7584af10 CL |
1446 | snd_iprintf(buffer, |
1447 | " Owner PID : %d\n", | |
1448 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1449 | runtime = substream->runtime; |
1450 | snd_iprintf(buffer, | |
1451 | " Mode : %s\n" | |
1452 | " Buffer size : %lu\n" | |
1453 | " Avail : %lu\n", | |
1454 | runtime->oss ? "OSS compatible" : "native", | |
1455 | (unsigned long) runtime->buffer_size, | |
1456 | (unsigned long) runtime->avail); | |
1457 | } | |
1458 | } | |
1459 | } | |
1460 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1461 | list_for_each_entry(substream, |
1462 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1463 | list) { | |
1da177e4 LT |
1464 | snd_iprintf(buffer, |
1465 | "Input %d\n" | |
1466 | " Rx bytes : %lu\n", | |
1467 | substream->number, | |
1468 | (unsigned long) substream->bytes); | |
1469 | if (substream->opened) { | |
7584af10 CL |
1470 | snd_iprintf(buffer, |
1471 | " Owner PID : %d\n", | |
1472 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1473 | runtime = substream->runtime; |
1474 | snd_iprintf(buffer, | |
1475 | " Buffer size : %lu\n" | |
1476 | " Avail : %lu\n" | |
1477 | " Overruns : %lu\n", | |
1478 | (unsigned long) runtime->buffer_size, | |
1479 | (unsigned long) runtime->avail, | |
1480 | (unsigned long) runtime->xruns); | |
1481 | } | |
1482 | } | |
1483 | } | |
1a60d4c5 | 1484 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1485 | } |
1486 | ||
1487 | /* | |
1488 | * Register functions | |
1489 | */ | |
1490 | ||
5bed9139 | 1491 | static const struct file_operations snd_rawmidi_f_ops = { |
1da177e4 LT |
1492 | .owner = THIS_MODULE, |
1493 | .read = snd_rawmidi_read, | |
1494 | .write = snd_rawmidi_write, | |
1495 | .open = snd_rawmidi_open, | |
1496 | .release = snd_rawmidi_release, | |
02f4865f | 1497 | .llseek = no_llseek, |
1da177e4 LT |
1498 | .poll = snd_rawmidi_poll, |
1499 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1500 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1501 | }; | |
1502 | ||
48c9d417 TI |
1503 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1504 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1505 | int direction, |
1506 | int count) | |
1507 | { | |
48c9d417 | 1508 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1509 | int idx; |
1510 | ||
1da177e4 | 1511 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1512 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 1513 | if (!substream) |
1da177e4 LT |
1514 | return -ENOMEM; |
1515 | substream->stream = direction; | |
1516 | substream->number = idx; | |
1517 | substream->rmidi = rmidi; | |
1518 | substream->pstr = stream; | |
1519 | list_add_tail(&substream->list, &stream->substreams); | |
1520 | stream->substream_count++; | |
1521 | } | |
1522 | return 0; | |
1523 | } | |
1524 | ||
aee5012f TI |
1525 | static void release_rawmidi_device(struct device *dev) |
1526 | { | |
1527 | kfree(container_of(dev, struct snd_rawmidi, dev)); | |
1528 | } | |
1529 | ||
1da177e4 LT |
1530 | /** |
1531 | * snd_rawmidi_new - create a rawmidi instance | |
1532 | * @card: the card instance | |
1533 | * @id: the id string | |
1534 | * @device: the device index | |
1535 | * @output_count: the number of output streams | |
1536 | * @input_count: the number of input streams | |
1537 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1538 | * | |
1539 | * Creates a new rawmidi instance. | |
1540 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1541 | * | |
eb7c06e8 | 1542 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1543 | */ |
48c9d417 | 1544 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1545 | int output_count, int input_count, |
5bed9139 | 1546 | struct snd_rawmidi **rrawmidi) |
1da177e4 | 1547 | { |
48c9d417 | 1548 | struct snd_rawmidi *rmidi; |
1da177e4 | 1549 | int err; |
48c9d417 | 1550 | static struct snd_device_ops ops = { |
1da177e4 LT |
1551 | .dev_free = snd_rawmidi_dev_free, |
1552 | .dev_register = snd_rawmidi_dev_register, | |
1553 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1554 | }; |
1555 | ||
7eaa943c TI |
1556 | if (snd_BUG_ON(!card)) |
1557 | return -ENXIO; | |
1558 | if (rrawmidi) | |
1559 | *rrawmidi = NULL; | |
ca2c0966 | 1560 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
ec0e9937 | 1561 | if (!rmidi) |
1da177e4 LT |
1562 | return -ENOMEM; |
1563 | rmidi->card = card; | |
1564 | rmidi->device = device; | |
1a60d4c5 | 1565 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1566 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1567 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1568 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1569 | ||
1da177e4 LT |
1570 | if (id != NULL) |
1571 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
aee5012f TI |
1572 | |
1573 | snd_device_initialize(&rmidi->dev, card); | |
1574 | rmidi->dev.release = release_rawmidi_device; | |
1575 | dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device); | |
1576 | ||
5bed9139 TI |
1577 | err = snd_rawmidi_alloc_substreams(rmidi, |
1578 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1579 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1580 | input_count); | |
7fdc9b08 TI |
1581 | if (err < 0) |
1582 | goto error; | |
5bed9139 TI |
1583 | err = snd_rawmidi_alloc_substreams(rmidi, |
1584 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1585 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1586 | output_count); | |
7fdc9b08 TI |
1587 | if (err < 0) |
1588 | goto error; | |
5bed9139 | 1589 | err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops); |
7fdc9b08 TI |
1590 | if (err < 0) |
1591 | goto error; | |
1592 | ||
7eaa943c TI |
1593 | if (rrawmidi) |
1594 | *rrawmidi = rmidi; | |
1da177e4 | 1595 | return 0; |
7fdc9b08 TI |
1596 | |
1597 | error: | |
1598 | snd_rawmidi_free(rmidi); | |
1599 | return err; | |
1da177e4 | 1600 | } |
6776a5d7 | 1601 | EXPORT_SYMBOL(snd_rawmidi_new); |
1da177e4 | 1602 | |
48c9d417 | 1603 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1604 | { |
48c9d417 | 1605 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1606 | |
1607 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1608 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1609 | list_del(&substream->list); |
1610 | kfree(substream); | |
1611 | } | |
1612 | } | |
1613 | ||
48c9d417 | 1614 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1615 | { |
7eaa943c TI |
1616 | if (!rmidi) |
1617 | return 0; | |
c461482c TI |
1618 | |
1619 | snd_info_free_entry(rmidi->proc_entry); | |
1620 | rmidi->proc_entry = NULL; | |
1621 | mutex_lock(®ister_mutex); | |
1622 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1623 | rmidi->ops->dev_unregister(rmidi); | |
1624 | mutex_unlock(®ister_mutex); | |
1625 | ||
1da177e4 LT |
1626 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1627 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1628 | if (rmidi->private_free) | |
1629 | rmidi->private_free(rmidi); | |
aee5012f | 1630 | put_device(&rmidi->dev); |
1da177e4 LT |
1631 | return 0; |
1632 | } | |
1633 | ||
48c9d417 | 1634 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1635 | { |
48c9d417 | 1636 | struct snd_rawmidi *rmidi = device->device_data; |
5bed9139 | 1637 | |
1da177e4 LT |
1638 | return snd_rawmidi_free(rmidi); |
1639 | } | |
1640 | ||
111b0cdb | 1641 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
48c9d417 | 1642 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1643 | { |
48c9d417 | 1644 | struct snd_rawmidi *rmidi = device->private_data; |
5bed9139 | 1645 | |
1da177e4 LT |
1646 | rmidi->seq_dev = NULL; |
1647 | } | |
1648 | #endif | |
1649 | ||
48c9d417 | 1650 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1651 | { |
f87135f5 | 1652 | int err; |
48c9d417 | 1653 | struct snd_info_entry *entry; |
1da177e4 | 1654 | char name[16]; |
48c9d417 | 1655 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1656 | |
1657 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1658 | return -ENOMEM; | |
7fdc9b08 | 1659 | err = 0; |
1a60d4c5 | 1660 | mutex_lock(®ister_mutex); |
7fdc9b08 TI |
1661 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) |
1662 | err = -EBUSY; | |
1663 | else | |
1664 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); | |
816f318b | 1665 | mutex_unlock(®ister_mutex); |
7fdc9b08 TI |
1666 | if (err < 0) |
1667 | return err; | |
1668 | ||
40a4b263 TI |
1669 | err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1670 | rmidi->card, rmidi->device, | |
1671 | &snd_rawmidi_f_ops, rmidi, &rmidi->dev); | |
aee5012f TI |
1672 | if (err < 0) { |
1673 | rmidi_err(rmidi, "unable to register\n"); | |
7fdc9b08 | 1674 | goto error; |
1da177e4 | 1675 | } |
7fdc9b08 TI |
1676 | if (rmidi->ops && rmidi->ops->dev_register) { |
1677 | err = rmidi->ops->dev_register(rmidi); | |
1678 | if (err < 0) | |
1679 | goto error_unregister; | |
1da177e4 LT |
1680 | } |
1681 | #ifdef CONFIG_SND_OSSEMUL | |
1682 | rmidi->ossreg = 0; | |
1683 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1684 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1685 | rmidi->card, 0, &snd_rawmidi_f_ops, |
80d7d771 | 1686 | rmidi) < 0) { |
ca20d292 TI |
1687 | rmidi_err(rmidi, |
1688 | "unable to register OSS rawmidi device %i:%i\n", | |
1689 | rmidi->card->number, 0); | |
1da177e4 LT |
1690 | } else { |
1691 | rmidi->ossreg++; | |
1692 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1693 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1694 | #endif | |
1695 | } | |
1696 | } | |
1697 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1698 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1699 | rmidi->card, 1, &snd_rawmidi_f_ops, |
80d7d771 | 1700 | rmidi) < 0) { |
ca20d292 TI |
1701 | rmidi_err(rmidi, |
1702 | "unable to register OSS rawmidi device %i:%i\n", | |
1703 | rmidi->card->number, 1); | |
1da177e4 LT |
1704 | } else { |
1705 | rmidi->ossreg++; | |
1706 | } | |
1707 | } | |
1708 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 LT |
1709 | sprintf(name, "midi%d", rmidi->device); |
1710 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1711 | if (entry) { | |
1712 | entry->private_data = rmidi; | |
1da177e4 LT |
1713 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1714 | if (snd_info_register(entry) < 0) { | |
1715 | snd_info_free_entry(entry); | |
1716 | entry = NULL; | |
1717 | } | |
1718 | } | |
1719 | rmidi->proc_entry = entry; | |
111b0cdb | 1720 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
1da177e4 LT |
1721 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
1722 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1723 | rmidi->seq_dev->private_data = rmidi; | |
1724 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1725 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1726 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1727 | } | |
1728 | } | |
1729 | #endif | |
1730 | return 0; | |
7fdc9b08 TI |
1731 | |
1732 | error_unregister: | |
1733 | snd_unregister_device(&rmidi->dev); | |
1734 | error: | |
1735 | mutex_lock(®ister_mutex); | |
1736 | list_del(&rmidi->list); | |
1737 | mutex_unlock(®ister_mutex); | |
1738 | return err; | |
1da177e4 LT |
1739 | } |
1740 | ||
48c9d417 | 1741 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1742 | { |
48c9d417 | 1743 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1744 | int dir; |
1da177e4 | 1745 | |
1a60d4c5 | 1746 | mutex_lock(®ister_mutex); |
0914f796 TI |
1747 | mutex_lock(&rmidi->open_mutex); |
1748 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1749 | list_del_init(&rmidi->list); |
0914f796 TI |
1750 | for (dir = 0; dir < 2; dir++) { |
1751 | struct snd_rawmidi_substream *s; | |
5bed9139 | 1752 | |
0914f796 TI |
1753 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { |
1754 | if (s->runtime) | |
1755 | wake_up(&s->runtime->sleep); | |
1756 | } | |
1757 | } | |
1758 | ||
1da177e4 LT |
1759 | #ifdef CONFIG_SND_OSSEMUL |
1760 | if (rmidi->ossreg) { | |
1761 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1762 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1763 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1764 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1765 | #endif | |
1766 | } | |
1767 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1768 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1769 | rmidi->ossreg = 0; | |
1770 | } | |
1771 | #endif /* CONFIG_SND_OSSEMUL */ | |
40a4b263 | 1772 | snd_unregister_device(&rmidi->dev); |
0914f796 | 1773 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1774 | mutex_unlock(®ister_mutex); |
c461482c | 1775 | return 0; |
1da177e4 LT |
1776 | } |
1777 | ||
1778 | /** | |
1779 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1780 | * @rmidi: the rawmidi instance | |
1781 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1782 | * @ops: the operator table | |
1783 | * | |
1784 | * Sets the rawmidi operators for the given stream direction. | |
1785 | */ | |
48c9d417 | 1786 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
6ba79b85 | 1787 | const struct snd_rawmidi_ops *ops) |
1da177e4 | 1788 | { |
48c9d417 | 1789 | struct snd_rawmidi_substream *substream; |
5bed9139 | 1790 | |
9244b2c3 | 1791 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1792 | substream->ops = ops; |
1da177e4 | 1793 | } |
6776a5d7 | 1794 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1da177e4 LT |
1795 | |
1796 | /* | |
1797 | * ENTRY functions | |
1798 | */ | |
1799 | ||
1800 | static int __init alsa_rawmidi_init(void) | |
1801 | { | |
1802 | ||
1803 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1804 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1805 | #ifdef CONFIG_SND_OSSEMUL | |
1806 | { int i; | |
1807 | /* check device map table */ | |
1808 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1809 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1810 | pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n", |
1811 | i, midi_map[i]); | |
1da177e4 LT |
1812 | midi_map[i] = 0; |
1813 | } | |
1814 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1815 | pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n", |
1816 | i, amidi_map[i]); | |
1da177e4 LT |
1817 | amidi_map[i] = 1; |
1818 | } | |
1819 | } | |
1820 | } | |
1821 | #endif /* CONFIG_SND_OSSEMUL */ | |
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | static void __exit alsa_rawmidi_exit(void) | |
1826 | { | |
1827 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1828 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1829 | } | |
1830 | ||
1831 | module_init(alsa_rawmidi_init) | |
1832 | module_exit(alsa_rawmidi_exit) |