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Commit | Line | Data |
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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 | |
d9e5582c BW |
53 | struct snd_rawmidi_status32 { |
54 | s32 stream; | |
55 | s32 tstamp_sec; /* Timestamp */ | |
56 | s32 tstamp_nsec; | |
57 | u32 avail; /* available bytes */ | |
58 | u32 xruns; /* count of overruns since last status (in bytes) */ | |
59 | unsigned char reserved[16]; /* reserved for future use */ | |
60 | }; | |
61 | ||
62 | #define SNDRV_RAWMIDI_IOCTL_STATUS32 _IOWR('W', 0x20, struct snd_rawmidi_status32) | |
63 | ||
64 | struct snd_rawmidi_status64 { | |
65 | int stream; | |
66 | u8 rsvd[4]; /* alignment */ | |
67 | s64 tstamp_sec; /* Timestamp */ | |
68 | s64 tstamp_nsec; | |
69 | size_t avail; /* available bytes */ | |
70 | size_t xruns; /* count of overruns since last status (in bytes) */ | |
71 | unsigned char reserved[16]; /* reserved for future use */ | |
72 | }; | |
73 | ||
74 | #define SNDRV_RAWMIDI_IOCTL_STATUS64 _IOWR('W', 0x20, struct snd_rawmidi_status64) | |
75 | ||
f87135f5 CL |
76 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
77 | { | |
f87135f5 CL |
78 | struct snd_rawmidi *rawmidi; |
79 | ||
9244b2c3 | 80 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
81 | if (rawmidi->card == card && rawmidi->device == device) |
82 | return rawmidi; | |
f87135f5 CL |
83 | return NULL; |
84 | } | |
85 | ||
1da177e4 LT |
86 | static 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 | ||
48c9d417 | 98 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 99 | { |
48c9d417 | 100 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
5bed9139 | 101 | |
1da177e4 LT |
102 | return runtime->avail >= runtime->avail_min; |
103 | } | |
104 | ||
48c9d417 TI |
105 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
106 | size_t count) | |
1da177e4 | 107 | { |
48c9d417 | 108 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
5bed9139 | 109 | |
1da177e4 LT |
110 | return runtime->avail >= runtime->avail_min && |
111 | (!substream->append || runtime->avail >= count); | |
112 | } | |
113 | ||
b3c705aa | 114 | static void snd_rawmidi_input_event_work(struct work_struct *work) |
1da177e4 | 115 | { |
b3c705aa TI |
116 | struct snd_rawmidi_runtime *runtime = |
117 | container_of(work, struct snd_rawmidi_runtime, event_work); | |
5bed9139 | 118 | |
b3c705aa TI |
119 | if (runtime->event) |
120 | runtime->event(runtime->substream); | |
1da177e4 LT |
121 | } |
122 | ||
c1f6e3c8 TI |
123 | /* buffer refcount management: call with runtime->lock held */ |
124 | static inline void snd_rawmidi_buffer_ref(struct snd_rawmidi_runtime *runtime) | |
125 | { | |
126 | runtime->buffer_ref++; | |
127 | } | |
128 | ||
129 | static inline void snd_rawmidi_buffer_unref(struct snd_rawmidi_runtime *runtime) | |
130 | { | |
131 | runtime->buffer_ref--; | |
132 | } | |
133 | ||
48c9d417 | 134 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 135 | { |
48c9d417 | 136 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 137 | |
5bed9139 TI |
138 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
139 | if (!runtime) | |
1da177e4 | 140 | return -ENOMEM; |
b3c705aa | 141 | runtime->substream = substream; |
1da177e4 LT |
142 | spin_lock_init(&runtime->lock); |
143 | init_waitqueue_head(&runtime->sleep); | |
b3c705aa | 144 | INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work); |
1da177e4 LT |
145 | runtime->event = NULL; |
146 | runtime->buffer_size = PAGE_SIZE; | |
147 | runtime->avail_min = 1; | |
148 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
149 | runtime->avail = 0; | |
150 | else | |
151 | runtime->avail = runtime->buffer_size; | |
5a7b44a8 | 152 | runtime->buffer = kvzalloc(runtime->buffer_size, GFP_KERNEL); |
5bed9139 | 153 | if (!runtime->buffer) { |
1da177e4 LT |
154 | kfree(runtime); |
155 | return -ENOMEM; | |
156 | } | |
157 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
158 | substream->runtime = runtime; | |
159 | return 0; | |
160 | } | |
161 | ||
48c9d417 | 162 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 163 | { |
48c9d417 | 164 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 165 | |
ef4db239 | 166 | kvfree(runtime->buffer); |
1da177e4 LT |
167 | kfree(runtime); |
168 | substream->runtime = NULL; | |
169 | return 0; | |
170 | } | |
171 | ||
5bed9139 | 172 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 173 | { |
219df32f TI |
174 | if (!substream->opened) |
175 | return; | |
b3c705aa | 176 | substream->ops->trigger(substream, up); |
1da177e4 LT |
177 | } |
178 | ||
48c9d417 | 179 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 180 | { |
219df32f TI |
181 | if (!substream->opened) |
182 | return; | |
1da177e4 | 183 | substream->ops->trigger(substream, up); |
b3c705aa TI |
184 | if (!up) |
185 | cancel_work_sync(&substream->runtime->event_work); | |
1da177e4 LT |
186 | } |
187 | ||
f5beb598 TI |
188 | static void __reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime, |
189 | bool is_input) | |
190 | { | |
191 | runtime->drain = 0; | |
192 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
193 | runtime->avail = is_input ? 0 : runtime->buffer_size; | |
194 | } | |
195 | ||
196 | static void reset_runtime_ptrs(struct snd_rawmidi_runtime *runtime, | |
197 | bool is_input) | |
1da177e4 LT |
198 | { |
199 | unsigned long flags; | |
1da177e4 | 200 | |
1da177e4 | 201 | spin_lock_irqsave(&runtime->lock, flags); |
f5beb598 | 202 | __reset_runtime_ptrs(runtime, is_input); |
1da177e4 | 203 | spin_unlock_irqrestore(&runtime->lock, flags); |
f5beb598 TI |
204 | } |
205 | ||
206 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) | |
207 | { | |
208 | snd_rawmidi_output_trigger(substream, 0); | |
209 | reset_runtime_ptrs(substream->runtime, false); | |
1da177e4 LT |
210 | return 0; |
211 | } | |
6776a5d7 | 212 | EXPORT_SYMBOL(snd_rawmidi_drop_output); |
1da177e4 | 213 | |
48c9d417 | 214 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
215 | { |
216 | int err; | |
217 | long timeout; | |
48c9d417 | 218 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
219 | |
220 | err = 0; | |
221 | runtime->drain = 1; | |
222 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
223 | (runtime->avail >= runtime->buffer_size), | |
224 | 10*HZ); | |
225 | if (signal_pending(current)) | |
226 | err = -ERESTARTSYS; | |
227 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
ca20d292 TI |
228 | rmidi_warn(substream->rmidi, |
229 | "rawmidi drain error (avail = %li, buffer_size = %li)\n", | |
230 | (long)runtime->avail, (long)runtime->buffer_size); | |
1da177e4 LT |
231 | err = -EIO; |
232 | } | |
233 | runtime->drain = 0; | |
234 | if (err != -ERESTARTSYS) { | |
235 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
236 | if (substream->ops->drain) | |
237 | substream->ops->drain(substream); | |
238 | else | |
239 | msleep(50); | |
240 | snd_rawmidi_drop_output(substream); | |
241 | } | |
242 | return err; | |
243 | } | |
6776a5d7 | 244 | EXPORT_SYMBOL(snd_rawmidi_drain_output); |
1da177e4 | 245 | |
48c9d417 | 246 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 | 247 | { |
1da177e4 | 248 | snd_rawmidi_input_trigger(substream, 0); |
f5beb598 | 249 | reset_runtime_ptrs(substream->runtime, true); |
1da177e4 LT |
250 | return 0; |
251 | } | |
6776a5d7 | 252 | EXPORT_SYMBOL(snd_rawmidi_drain_input); |
1da177e4 | 253 | |
9a1b64ca TI |
254 | /* look for an available substream for the given stream direction; |
255 | * if a specific subdevice is given, try to assign it | |
256 | */ | |
257 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
258 | int stream, int mode, | |
259 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 260 | { |
9a1b64ca TI |
261 | struct snd_rawmidi_substream *substream; |
262 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
edb87ed5 | 263 | static const unsigned int info_flags[2] = { |
9a1b64ca TI |
264 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, |
265 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
266 | }; | |
1da177e4 | 267 | |
9a1b64ca | 268 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 269 | return -ENXIO; |
9a1b64ca TI |
270 | if (subdevice >= 0 && subdevice >= s->substream_count) |
271 | return -ENODEV; | |
9a1b64ca TI |
272 | |
273 | list_for_each_entry(substream, &s->substreams, list) { | |
274 | if (substream->opened) { | |
275 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
16fb1096 CL |
276 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
277 | !substream->append) | |
9a1b64ca TI |
278 | continue; |
279 | } | |
280 | if (subdevice < 0 || subdevice == substream->number) { | |
281 | *sub_ret = substream; | |
282 | return 0; | |
283 | } | |
1da177e4 | 284 | } |
9a1b64ca TI |
285 | return -EAGAIN; |
286 | } | |
f9d20283 | 287 | |
9a1b64ca TI |
288 | /* open and do ref-counting for the given substream */ |
289 | static int open_substream(struct snd_rawmidi *rmidi, | |
290 | struct snd_rawmidi_substream *substream, | |
291 | int mode) | |
292 | { | |
293 | int err; | |
294 | ||
8579d2d7 CL |
295 | if (substream->use_count == 0) { |
296 | err = snd_rawmidi_runtime_create(substream); | |
297 | if (err < 0) | |
298 | return err; | |
299 | err = substream->ops->open(substream); | |
b7fe750f CL |
300 | if (err < 0) { |
301 | snd_rawmidi_runtime_free(substream); | |
8579d2d7 | 302 | return err; |
b7fe750f | 303 | } |
8579d2d7 | 304 | substream->opened = 1; |
2d4b8420 | 305 | substream->active_sensing = 0; |
8579d2d7 CL |
306 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
307 | substream->append = 1; | |
7584af10 | 308 | substream->pid = get_pid(task_pid(current)); |
91d12c48 | 309 | rmidi->streams[substream->stream].substream_opened++; |
8579d2d7 CL |
310 | } |
311 | substream->use_count++; | |
9a1b64ca TI |
312 | return 0; |
313 | } | |
314 | ||
315 | static void close_substream(struct snd_rawmidi *rmidi, | |
316 | struct snd_rawmidi_substream *substream, | |
317 | int cleanup); | |
318 | ||
319 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
320 | struct snd_rawmidi_file *rfile) | |
321 | { | |
322 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
323 | int err; | |
324 | ||
325 | rfile->input = rfile->output = NULL; | |
1da177e4 | 326 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
327 | err = assign_substream(rmidi, subdevice, |
328 | SNDRV_RAWMIDI_STREAM_INPUT, | |
329 | mode, &sinput); | |
330 | if (err < 0) | |
b7fe750f | 331 | return err; |
1da177e4 LT |
332 | } |
333 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
334 | err = assign_substream(rmidi, subdevice, |
335 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
336 | mode, &soutput); | |
337 | if (err < 0) | |
b7fe750f | 338 | return err; |
1da177e4 | 339 | } |
9a1b64ca TI |
340 | |
341 | if (sinput) { | |
342 | err = open_substream(rmidi, sinput, mode); | |
343 | if (err < 0) | |
b7fe750f | 344 | return err; |
1da177e4 | 345 | } |
9a1b64ca TI |
346 | if (soutput) { |
347 | err = open_substream(rmidi, soutput, mode); | |
348 | if (err < 0) { | |
349 | if (sinput) | |
350 | close_substream(rmidi, sinput, 0); | |
b7fe750f | 351 | return err; |
1da177e4 | 352 | } |
1da177e4 | 353 | } |
9a1b64ca TI |
354 | |
355 | rfile->rmidi = rmidi; | |
356 | rfile->input = sinput; | |
357 | rfile->output = soutput; | |
1da177e4 | 358 | return 0; |
9a1b64ca TI |
359 | } |
360 | ||
361 | /* called from sound/core/seq/seq_midi.c */ | |
362 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
5bed9139 | 363 | int mode, struct snd_rawmidi_file *rfile) |
9a1b64ca TI |
364 | { |
365 | struct snd_rawmidi *rmidi; | |
7fdc9b08 | 366 | int err = 0; |
9a1b64ca TI |
367 | |
368 | if (snd_BUG_ON(!rfile)) | |
369 | return -EINVAL; | |
370 | ||
371 | mutex_lock(®ister_mutex); | |
372 | rmidi = snd_rawmidi_search(card, device); | |
7fdc9b08 TI |
373 | if (!rmidi) |
374 | err = -ENODEV; | |
375 | else if (!try_module_get(rmidi->card->module)) | |
376 | err = -ENXIO; | |
9a1b64ca | 377 | mutex_unlock(®ister_mutex); |
7fdc9b08 TI |
378 | if (err < 0) |
379 | return err; | |
9a1b64ca TI |
380 | |
381 | mutex_lock(&rmidi->open_mutex); | |
382 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
383 | mutex_unlock(&rmidi->open_mutex); | |
384 | if (err < 0) | |
385 | module_put(rmidi->card->module); | |
1da177e4 LT |
386 | return err; |
387 | } | |
6776a5d7 | 388 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
1da177e4 LT |
389 | |
390 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
391 | { | |
392 | int maj = imajor(inode); | |
48c9d417 | 393 | struct snd_card *card; |
f87135f5 | 394 | int subdevice; |
1da177e4 LT |
395 | unsigned short fflags; |
396 | int err; | |
48c9d417 | 397 | struct snd_rawmidi *rmidi; |
9a1b64ca | 398 | struct snd_rawmidi_file *rawmidi_file = NULL; |
ac6424b9 | 399 | wait_queue_entry_t wait; |
1da177e4 | 400 | |
5bed9139 | 401 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
9a1b64ca TI |
402 | return -EINVAL; /* invalid combination */ |
403 | ||
c5bf68fe | 404 | err = stream_open(inode, file); |
02f4865f TI |
405 | if (err < 0) |
406 | return err; | |
407 | ||
f1902860 | 408 | if (maj == snd_major) { |
f87135f5 CL |
409 | rmidi = snd_lookup_minor_data(iminor(inode), |
410 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 411 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 412 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
413 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
414 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 415 | #endif |
f1902860 | 416 | } else |
1da177e4 | 417 | return -ENXIO; |
1da177e4 | 418 | |
1da177e4 LT |
419 | if (rmidi == NULL) |
420 | return -ENODEV; | |
9a1b64ca | 421 | |
a0830dbd TI |
422 | if (!try_module_get(rmidi->card->module)) { |
423 | snd_card_unref(rmidi->card); | |
9a1b64ca | 424 | return -ENXIO; |
a0830dbd | 425 | } |
9a1b64ca TI |
426 | |
427 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
428 | card = rmidi->card; |
429 | err = snd_card_file_add(card, file); | |
430 | if (err < 0) | |
9a1b64ca | 431 | goto __error_card; |
1da177e4 | 432 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 433 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 434 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
435 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
436 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
437 | err = -ENOMEM; |
438 | goto __error; | |
1da177e4 LT |
439 | } |
440 | init_waitqueue_entry(&wait, current); | |
441 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 | 442 | while (1) { |
23c18d4b | 443 | subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI); |
9a1b64ca | 444 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
445 | if (err >= 0) |
446 | break; | |
447 | if (err == -EAGAIN) { | |
448 | if (file->f_flags & O_NONBLOCK) { | |
449 | err = -EBUSY; | |
450 | break; | |
451 | } | |
452 | } else | |
453 | break; | |
454 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 455 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 456 | schedule(); |
1a60d4c5 | 457 | mutex_lock(&rmidi->open_mutex); |
0914f796 TI |
458 | if (rmidi->card->shutdown) { |
459 | err = -ENODEV; | |
460 | break; | |
461 | } | |
1da177e4 LT |
462 | if (signal_pending(current)) { |
463 | err = -ERESTARTSYS; | |
464 | break; | |
465 | } | |
466 | } | |
9a1b64ca TI |
467 | remove_wait_queue(&rmidi->open_wait, &wait); |
468 | if (err < 0) { | |
469 | kfree(rawmidi_file); | |
470 | goto __error; | |
471 | } | |
1da177e4 LT |
472 | #ifdef CONFIG_SND_OSSEMUL |
473 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
474 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
475 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
476 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
477 | #endif | |
9a1b64ca TI |
478 | file->private_data = rawmidi_file; |
479 | mutex_unlock(&rmidi->open_mutex); | |
a0830dbd | 480 | snd_card_unref(rmidi->card); |
9a1b64ca TI |
481 | return 0; |
482 | ||
483 | __error: | |
484 | snd_card_file_remove(card, file); | |
485 | __error_card: | |
1a60d4c5 | 486 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 487 | module_put(rmidi->card->module); |
a0830dbd | 488 | snd_card_unref(rmidi->card); |
1da177e4 LT |
489 | return err; |
490 | } | |
491 | ||
9a1b64ca TI |
492 | static void close_substream(struct snd_rawmidi *rmidi, |
493 | struct snd_rawmidi_substream *substream, | |
494 | int cleanup) | |
1da177e4 | 495 | { |
9a1b64ca TI |
496 | if (--substream->use_count) |
497 | return; | |
1da177e4 | 498 | |
9a1b64ca TI |
499 | if (cleanup) { |
500 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
501 | snd_rawmidi_input_trigger(substream, 0); | |
502 | else { | |
1da177e4 LT |
503 | if (substream->active_sensing) { |
504 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
505 | /* sending single active sensing message |
506 | * to shut the device up | |
507 | */ | |
1da177e4 LT |
508 | snd_rawmidi_kernel_write(substream, &buf, 1); |
509 | } | |
510 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
511 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 512 | } |
1da177e4 | 513 | } |
9a1b64ca TI |
514 | substream->ops->close(substream); |
515 | if (substream->runtime->private_free) | |
516 | substream->runtime->private_free(substream); | |
517 | snd_rawmidi_runtime_free(substream); | |
518 | substream->opened = 0; | |
519 | substream->append = 0; | |
7584af10 CL |
520 | put_pid(substream->pid); |
521 | substream->pid = NULL; | |
91d12c48 | 522 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
523 | } |
524 | ||
525 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
526 | { | |
527 | struct snd_rawmidi *rmidi; | |
528 | ||
529 | rmidi = rfile->rmidi; | |
530 | mutex_lock(&rmidi->open_mutex); | |
531 | if (rfile->input) { | |
532 | close_substream(rmidi, rfile->input, 1); | |
533 | rfile->input = NULL; | |
534 | } | |
535 | if (rfile->output) { | |
536 | close_substream(rmidi, rfile->output, 1); | |
537 | rfile->output = NULL; | |
538 | } | |
539 | rfile->rmidi = NULL; | |
1a60d4c5 | 540 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
541 | wake_up(&rmidi->open_wait); |
542 | } | |
543 | ||
544 | /* called from sound/core/seq/seq_midi.c */ | |
545 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
546 | { | |
547 | struct snd_rawmidi *rmidi; | |
548 | ||
549 | if (snd_BUG_ON(!rfile)) | |
550 | return -ENXIO; | |
5bed9139 | 551 | |
9a1b64ca TI |
552 | rmidi = rfile->rmidi; |
553 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
554 | module_put(rmidi->card->module); |
555 | return 0; | |
556 | } | |
6776a5d7 | 557 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
1da177e4 LT |
558 | |
559 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
560 | { | |
48c9d417 TI |
561 | struct snd_rawmidi_file *rfile; |
562 | struct snd_rawmidi *rmidi; | |
aa73aec6 | 563 | struct module *module; |
1da177e4 LT |
564 | |
565 | rfile = file->private_data; | |
1da177e4 | 566 | rmidi = rfile->rmidi; |
9a1b64ca | 567 | rawmidi_release_priv(rfile); |
1da177e4 | 568 | kfree(rfile); |
aa73aec6 | 569 | module = rmidi->card->module; |
1da177e4 | 570 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 571 | module_put(module); |
9a1b64ca | 572 | return 0; |
1da177e4 LT |
573 | } |
574 | ||
18612048 AB |
575 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
576 | struct snd_rawmidi_info *info) | |
1da177e4 | 577 | { |
48c9d417 | 578 | struct snd_rawmidi *rmidi; |
5bed9139 | 579 | |
1da177e4 LT |
580 | if (substream == NULL) |
581 | return -ENODEV; | |
582 | rmidi = substream->rmidi; | |
583 | memset(info, 0, sizeof(*info)); | |
584 | info->card = rmidi->card->number; | |
585 | info->device = rmidi->device; | |
586 | info->subdevice = substream->number; | |
587 | info->stream = substream->stream; | |
588 | info->flags = rmidi->info_flags; | |
589 | strcpy(info->id, rmidi->id); | |
590 | strcpy(info->name, rmidi->name); | |
591 | strcpy(info->subname, substream->name); | |
592 | info->subdevices_count = substream->pstr->substream_count; | |
593 | info->subdevices_avail = (substream->pstr->substream_count - | |
594 | substream->pstr->substream_opened); | |
595 | return 0; | |
596 | } | |
597 | ||
48c9d417 | 598 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
5bed9139 | 599 | struct snd_rawmidi_info __user *_info) |
1da177e4 | 600 | { |
48c9d417 | 601 | struct snd_rawmidi_info info; |
1da177e4 | 602 | int err; |
5bed9139 TI |
603 | |
604 | err = snd_rawmidi_info(substream, &info); | |
605 | if (err < 0) | |
1da177e4 | 606 | return err; |
48c9d417 | 607 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
608 | return -EFAULT; |
609 | return 0; | |
610 | } | |
611 | ||
c1cfd902 TI |
612 | static int __snd_rawmidi_info_select(struct snd_card *card, |
613 | struct snd_rawmidi_info *info) | |
1da177e4 | 614 | { |
48c9d417 TI |
615 | struct snd_rawmidi *rmidi; |
616 | struct snd_rawmidi_str *pstr; | |
617 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 618 | |
f87135f5 | 619 | rmidi = snd_rawmidi_search(card, info->device); |
a106cd3d CL |
620 | if (!rmidi) |
621 | return -ENXIO; | |
1da177e4 LT |
622 | if (info->stream < 0 || info->stream > 1) |
623 | return -EINVAL; | |
2b1d9c8f | 624 | info->stream = array_index_nospec(info->stream, 2); |
1da177e4 LT |
625 | pstr = &rmidi->streams[info->stream]; |
626 | if (pstr->substream_count == 0) | |
627 | return -ENOENT; | |
628 | if (info->subdevice >= pstr->substream_count) | |
629 | return -ENXIO; | |
9244b2c3 | 630 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
631 | if ((unsigned int)substream->number == info->subdevice) |
632 | return snd_rawmidi_info(substream, info); | |
633 | } | |
634 | return -ENXIO; | |
635 | } | |
c1cfd902 TI |
636 | |
637 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) | |
638 | { | |
639 | int ret; | |
640 | ||
641 | mutex_lock(®ister_mutex); | |
642 | ret = __snd_rawmidi_info_select(card, info); | |
643 | mutex_unlock(®ister_mutex); | |
644 | return ret; | |
645 | } | |
6776a5d7 | 646 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1da177e4 | 647 | |
48c9d417 TI |
648 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
649 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
650 | { |
651 | int err; | |
48c9d417 | 652 | struct snd_rawmidi_info info; |
5bed9139 | 653 | |
1da177e4 LT |
654 | if (get_user(info.device, &_info->device)) |
655 | return -EFAULT; | |
656 | if (get_user(info.stream, &_info->stream)) | |
657 | return -EFAULT; | |
658 | if (get_user(info.subdevice, &_info->subdevice)) | |
659 | return -EFAULT; | |
5bed9139 TI |
660 | err = snd_rawmidi_info_select(card, &info); |
661 | if (err < 0) | |
1da177e4 | 662 | return err; |
48c9d417 | 663 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
664 | return -EFAULT; |
665 | return 0; | |
666 | } | |
667 | ||
f5beb598 TI |
668 | static int resize_runtime_buffer(struct snd_rawmidi_runtime *runtime, |
669 | struct snd_rawmidi_params *params, | |
670 | bool is_input) | |
1da177e4 | 671 | { |
39675f7a | 672 | char *newbuf, *oldbuf; |
5bed9139 | 673 | |
5bed9139 | 674 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) |
1da177e4 | 675 | return -EINVAL; |
5bed9139 | 676 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) |
1da177e4 | 677 | return -EINVAL; |
1da177e4 | 678 | if (params->buffer_size != runtime->buffer_size) { |
5a7b44a8 | 679 | newbuf = kvzalloc(params->buffer_size, GFP_KERNEL); |
4fa95ef6 | 680 | if (!newbuf) |
1da177e4 | 681 | return -ENOMEM; |
39675f7a | 682 | spin_lock_irq(&runtime->lock); |
c1f6e3c8 TI |
683 | if (runtime->buffer_ref) { |
684 | spin_unlock_irq(&runtime->lock); | |
685 | kvfree(newbuf); | |
686 | return -EBUSY; | |
687 | } | |
39675f7a | 688 | oldbuf = runtime->buffer; |
1da177e4 LT |
689 | runtime->buffer = newbuf; |
690 | runtime->buffer_size = params->buffer_size; | |
f5beb598 | 691 | __reset_runtime_ptrs(runtime, is_input); |
39675f7a | 692 | spin_unlock_irq(&runtime->lock); |
ef4db239 | 693 | kvfree(oldbuf); |
1da177e4 LT |
694 | } |
695 | runtime->avail_min = params->avail_min; | |
1da177e4 LT |
696 | return 0; |
697 | } | |
f5beb598 TI |
698 | |
699 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, | |
700 | struct snd_rawmidi_params *params) | |
701 | { | |
702 | if (substream->append && substream->use_count > 1) | |
703 | return -EBUSY; | |
704 | snd_rawmidi_drain_output(substream); | |
705 | substream->active_sensing = !params->no_active_sensing; | |
706 | return resize_runtime_buffer(substream->runtime, params, false); | |
707 | } | |
6776a5d7 | 708 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1da177e4 | 709 | |
48c9d417 | 710 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
5bed9139 | 711 | struct snd_rawmidi_params *params) |
1da177e4 | 712 | { |
1da177e4 | 713 | snd_rawmidi_drain_input(substream); |
f5beb598 | 714 | return resize_runtime_buffer(substream->runtime, params, true); |
1da177e4 | 715 | } |
6776a5d7 | 716 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1da177e4 | 717 | |
48c9d417 | 718 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
d9e5582c | 719 | struct snd_rawmidi_status64 *status) |
1da177e4 | 720 | { |
48c9d417 | 721 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
722 | |
723 | memset(status, 0, sizeof(*status)); | |
724 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
725 | spin_lock_irq(&runtime->lock); | |
726 | status->avail = runtime->avail; | |
727 | spin_unlock_irq(&runtime->lock); | |
728 | return 0; | |
729 | } | |
730 | ||
48c9d417 | 731 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
d9e5582c | 732 | struct snd_rawmidi_status64 *status) |
1da177e4 | 733 | { |
48c9d417 | 734 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
735 | |
736 | memset(status, 0, sizeof(*status)); | |
737 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
738 | spin_lock_irq(&runtime->lock); | |
739 | status->avail = runtime->avail; | |
740 | status->xruns = runtime->xruns; | |
741 | runtime->xruns = 0; | |
742 | spin_unlock_irq(&runtime->lock); | |
743 | return 0; | |
744 | } | |
745 | ||
d9e5582c BW |
746 | static int snd_rawmidi_ioctl_status32(struct snd_rawmidi_file *rfile, |
747 | struct snd_rawmidi_status32 __user *argp) | |
748 | { | |
749 | int err = 0; | |
750 | struct snd_rawmidi_status32 __user *status = argp; | |
751 | struct snd_rawmidi_status32 status32; | |
752 | struct snd_rawmidi_status64 status64; | |
753 | ||
754 | if (copy_from_user(&status32, argp, | |
755 | sizeof(struct snd_rawmidi_status32))) | |
756 | return -EFAULT; | |
757 | ||
758 | switch (status32.stream) { | |
759 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
760 | if (rfile->output == NULL) | |
761 | return -EINVAL; | |
762 | err = snd_rawmidi_output_status(rfile->output, &status64); | |
763 | break; | |
764 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
765 | if (rfile->input == NULL) | |
766 | return -EINVAL; | |
767 | err = snd_rawmidi_input_status(rfile->input, &status64); | |
768 | break; | |
769 | default: | |
770 | return -EINVAL; | |
771 | } | |
772 | if (err < 0) | |
773 | return err; | |
774 | ||
775 | status32 = (struct snd_rawmidi_status32) { | |
776 | .stream = status64.stream, | |
777 | .tstamp_sec = status64.tstamp_sec, | |
778 | .tstamp_nsec = status64.tstamp_nsec, | |
779 | .avail = status64.avail, | |
780 | .xruns = status64.xruns, | |
781 | }; | |
782 | ||
783 | if (copy_to_user(status, &status32, sizeof(*status))) | |
784 | return -EFAULT; | |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | static int snd_rawmidi_ioctl_status64(struct snd_rawmidi_file *rfile, | |
790 | struct snd_rawmidi_status64 __user *argp) | |
791 | { | |
792 | int err = 0; | |
793 | struct snd_rawmidi_status64 status; | |
794 | ||
795 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status64))) | |
796 | return -EFAULT; | |
797 | ||
798 | switch (status.stream) { | |
799 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
800 | if (rfile->output == NULL) | |
801 | return -EINVAL; | |
802 | err = snd_rawmidi_output_status(rfile->output, &status); | |
803 | break; | |
804 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
805 | if (rfile->input == NULL) | |
806 | return -EINVAL; | |
807 | err = snd_rawmidi_input_status(rfile->input, &status); | |
808 | break; | |
809 | default: | |
810 | return -EINVAL; | |
811 | } | |
812 | if (err < 0) | |
813 | return err; | |
814 | if (copy_to_user(argp, &status, | |
815 | sizeof(struct snd_rawmidi_status64))) | |
816 | return -EFAULT; | |
817 | return 0; | |
818 | } | |
819 | ||
1da177e4 LT |
820 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
821 | { | |
48c9d417 | 822 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
823 | void __user *argp = (void __user *)arg; |
824 | ||
825 | rfile = file->private_data; | |
826 | if (((cmd >> 8) & 0xff) != 'W') | |
827 | return -ENOTTY; | |
828 | switch (cmd) { | |
829 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
830 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
831 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
832 | { | |
48c9d417 TI |
833 | int stream; |
834 | struct snd_rawmidi_info __user *info = argp; | |
5bed9139 | 835 | |
1da177e4 LT |
836 | if (get_user(stream, &info->stream)) |
837 | return -EFAULT; | |
838 | switch (stream) { | |
839 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
840 | return snd_rawmidi_info_user(rfile->input, info); | |
841 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
842 | return snd_rawmidi_info_user(rfile->output, info); | |
843 | default: | |
844 | return -EINVAL; | |
845 | } | |
846 | } | |
847 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
848 | { | |
48c9d417 | 849 | struct snd_rawmidi_params params; |
5bed9139 | 850 | |
48c9d417 | 851 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) |
1da177e4 LT |
852 | return -EFAULT; |
853 | switch (params.stream) { | |
854 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
855 | if (rfile->output == NULL) | |
856 | return -EINVAL; | |
857 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
858 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
859 | if (rfile->input == NULL) | |
860 | return -EINVAL; | |
861 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
862 | default: | |
863 | return -EINVAL; | |
864 | } | |
865 | } | |
d9e5582c BW |
866 | case SNDRV_RAWMIDI_IOCTL_STATUS32: |
867 | return snd_rawmidi_ioctl_status32(rfile, argp); | |
868 | case SNDRV_RAWMIDI_IOCTL_STATUS64: | |
869 | return snd_rawmidi_ioctl_status64(rfile, argp); | |
1da177e4 LT |
870 | case SNDRV_RAWMIDI_IOCTL_DROP: |
871 | { | |
872 | int val; | |
5bed9139 | 873 | |
1da177e4 LT |
874 | if (get_user(val, (int __user *) argp)) |
875 | return -EFAULT; | |
876 | switch (val) { | |
877 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
878 | if (rfile->output == NULL) | |
879 | return -EINVAL; | |
880 | return snd_rawmidi_drop_output(rfile->output); | |
881 | default: | |
882 | return -EINVAL; | |
883 | } | |
884 | } | |
885 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
886 | { | |
887 | int val; | |
5bed9139 | 888 | |
1da177e4 LT |
889 | if (get_user(val, (int __user *) argp)) |
890 | return -EFAULT; | |
891 | switch (val) { | |
892 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
893 | if (rfile->output == NULL) | |
894 | return -EINVAL; | |
895 | return snd_rawmidi_drain_output(rfile->output); | |
896 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
897 | if (rfile->input == NULL) | |
898 | return -EINVAL; | |
899 | return snd_rawmidi_drain_input(rfile->input); | |
900 | default: | |
901 | return -EINVAL; | |
902 | } | |
903 | } | |
1da177e4 | 904 | default: |
ca20d292 TI |
905 | rmidi_dbg(rfile->rmidi, |
906 | "rawmidi: unknown command = 0x%x\n", cmd); | |
1da177e4 LT |
907 | } |
908 | return -ENOTTY; | |
909 | } | |
910 | ||
48c9d417 TI |
911 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
912 | struct snd_ctl_file *control, | |
1da177e4 LT |
913 | unsigned int cmd, |
914 | unsigned long arg) | |
915 | { | |
916 | void __user *argp = (void __user *)arg; | |
1da177e4 | 917 | |
1da177e4 LT |
918 | switch (cmd) { |
919 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
920 | { | |
921 | int device; | |
5bed9139 | 922 | |
1da177e4 LT |
923 | if (get_user(device, (int __user *)argp)) |
924 | return -EFAULT; | |
a7a13d06 DC |
925 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
926 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 927 | mutex_lock(®ister_mutex); |
1da177e4 LT |
928 | device = device < 0 ? 0 : device + 1; |
929 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 930 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
931 | break; |
932 | device++; | |
933 | } | |
934 | if (device == SNDRV_RAWMIDI_DEVICES) | |
935 | device = -1; | |
1a60d4c5 | 936 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
937 | if (put_user(device, (int __user *)argp)) |
938 | return -EFAULT; | |
939 | return 0; | |
940 | } | |
941 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
942 | { | |
943 | int val; | |
5bed9139 | 944 | |
1da177e4 LT |
945 | if (get_user(val, (int __user *)argp)) |
946 | return -EFAULT; | |
23c18d4b | 947 | control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val; |
1da177e4 LT |
948 | return 0; |
949 | } | |
950 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
951 | return snd_rawmidi_info_select_user(card, argp); | |
952 | } | |
953 | return -ENOIOCTLCMD; | |
954 | } | |
955 | ||
956 | /** | |
957 | * snd_rawmidi_receive - receive the input data from the device | |
958 | * @substream: the rawmidi substream | |
959 | * @buffer: the buffer pointer | |
960 | * @count: the data size to read | |
961 | * | |
962 | * Reads the data from the internal buffer. | |
963 | * | |
eb7c06e8 | 964 | * Return: The size of read data, or a negative error code on failure. |
1da177e4 | 965 | */ |
48c9d417 TI |
966 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
967 | const unsigned char *buffer, int count) | |
1da177e4 LT |
968 | { |
969 | unsigned long flags; | |
970 | int result = 0, count1; | |
48c9d417 | 971 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 972 | |
219df32f TI |
973 | if (!substream->opened) |
974 | return -EBADFD; | |
1da177e4 | 975 | if (runtime->buffer == NULL) { |
ca20d292 TI |
976 | rmidi_dbg(substream->rmidi, |
977 | "snd_rawmidi_receive: input is not active!!!\n"); | |
1da177e4 LT |
978 | return -EINVAL; |
979 | } | |
980 | spin_lock_irqsave(&runtime->lock, flags); | |
981 | if (count == 1) { /* special case, faster code */ | |
982 | substream->bytes++; | |
983 | if (runtime->avail < runtime->buffer_size) { | |
984 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
985 | runtime->hw_ptr %= runtime->buffer_size; | |
986 | runtime->avail++; | |
987 | result++; | |
988 | } else { | |
989 | runtime->xruns++; | |
990 | } | |
991 | } else { | |
992 | substream->bytes += count; | |
993 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
994 | if (count1 > count) | |
995 | count1 = count; | |
996 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
997 | count1 = runtime->buffer_size - runtime->avail; | |
998 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
999 | runtime->hw_ptr += count1; | |
1000 | runtime->hw_ptr %= runtime->buffer_size; | |
1001 | runtime->avail += count1; | |
1002 | count -= count1; | |
1003 | result += count1; | |
1004 | if (count > 0) { | |
1005 | buffer += count1; | |
1006 | count1 = count; | |
1007 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
1008 | count1 = runtime->buffer_size - runtime->avail; | |
1009 | runtime->xruns += count - count1; | |
1010 | } | |
1011 | if (count1 > 0) { | |
1012 | memcpy(runtime->buffer, buffer, count1); | |
1013 | runtime->hw_ptr = count1; | |
1014 | runtime->avail += count1; | |
1015 | result += count1; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | if (result > 0) { | |
1020 | if (runtime->event) | |
b3c705aa | 1021 | schedule_work(&runtime->event_work); |
1da177e4 LT |
1022 | else if (snd_rawmidi_ready(substream)) |
1023 | wake_up(&runtime->sleep); | |
1024 | } | |
1025 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1026 | return result; | |
1027 | } | |
6776a5d7 | 1028 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1da177e4 | 1029 | |
48c9d417 | 1030 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1031 | unsigned char __user *userbuf, |
1032 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
1033 | { |
1034 | unsigned long flags; | |
1035 | long result = 0, count1; | |
48c9d417 | 1036 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 1037 | unsigned long appl_ptr; |
c1f6e3c8 | 1038 | int err = 0; |
1da177e4 | 1039 | |
81f57754 | 1040 | spin_lock_irqsave(&runtime->lock, flags); |
c1f6e3c8 | 1041 | snd_rawmidi_buffer_ref(runtime); |
1da177e4 LT |
1042 | while (count > 0 && runtime->avail) { |
1043 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1044 | if (count1 > count) | |
1045 | count1 = count; | |
1da177e4 LT |
1046 | if (count1 > (int)runtime->avail) |
1047 | count1 = runtime->avail; | |
81f57754 TI |
1048 | |
1049 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
1050 | appl_ptr = runtime->appl_ptr; | |
1051 | runtime->appl_ptr += count1; | |
1052 | runtime->appl_ptr %= runtime->buffer_size; | |
1053 | runtime->avail -= count1; | |
1054 | ||
17596a80 | 1055 | if (kernelbuf) |
81f57754 | 1056 | memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1); |
17596a80 | 1057 | if (userbuf) { |
1da177e4 | 1058 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 1059 | if (copy_to_user(userbuf + result, |
c1f6e3c8 TI |
1060 | runtime->buffer + appl_ptr, count1)) |
1061 | err = -EFAULT; | |
1da177e4 | 1062 | spin_lock_irqsave(&runtime->lock, flags); |
c1f6e3c8 TI |
1063 | if (err) |
1064 | goto out; | |
1da177e4 | 1065 | } |
1da177e4 LT |
1066 | result += count1; |
1067 | count -= count1; | |
1068 | } | |
c1f6e3c8 TI |
1069 | out: |
1070 | snd_rawmidi_buffer_unref(runtime); | |
81f57754 | 1071 | spin_unlock_irqrestore(&runtime->lock, flags); |
c1f6e3c8 | 1072 | return result > 0 ? result : err; |
1da177e4 LT |
1073 | } |
1074 | ||
48c9d417 TI |
1075 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
1076 | unsigned char *buf, long count) | |
1da177e4 LT |
1077 | { |
1078 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 1079 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 | 1080 | } |
6776a5d7 | 1081 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1da177e4 | 1082 | |
48c9d417 TI |
1083 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
1084 | loff_t *offset) | |
1da177e4 LT |
1085 | { |
1086 | long result; | |
1087 | int count1; | |
48c9d417 TI |
1088 | struct snd_rawmidi_file *rfile; |
1089 | struct snd_rawmidi_substream *substream; | |
1090 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1091 | |
1092 | rfile = file->private_data; | |
1093 | substream = rfile->input; | |
1094 | if (substream == NULL) | |
1095 | return -EIO; | |
1096 | runtime = substream->runtime; | |
1097 | snd_rawmidi_input_trigger(substream, 1); | |
1098 | result = 0; | |
1099 | while (count > 0) { | |
1100 | spin_lock_irq(&runtime->lock); | |
1101 | while (!snd_rawmidi_ready(substream)) { | |
ac6424b9 | 1102 | wait_queue_entry_t wait; |
5bed9139 | 1103 | |
1da177e4 LT |
1104 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
1105 | spin_unlock_irq(&runtime->lock); | |
1106 | return result > 0 ? result : -EAGAIN; | |
1107 | } | |
1108 | init_waitqueue_entry(&wait, current); | |
1109 | add_wait_queue(&runtime->sleep, &wait); | |
1110 | set_current_state(TASK_INTERRUPTIBLE); | |
1111 | spin_unlock_irq(&runtime->lock); | |
1112 | schedule(); | |
1113 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1114 | if (rfile->rmidi->card->shutdown) |
1115 | return -ENODEV; | |
1da177e4 LT |
1116 | if (signal_pending(current)) |
1117 | return result > 0 ? result : -ERESTARTSYS; | |
1118 | if (!runtime->avail) | |
1119 | return result > 0 ? result : -EIO; | |
1120 | spin_lock_irq(&runtime->lock); | |
1121 | } | |
1122 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1123 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1124 | (unsigned char __user *)buf, |
1125 | NULL/*kernelbuf*/, | |
1126 | count); | |
1da177e4 LT |
1127 | if (count1 < 0) |
1128 | return result > 0 ? result : count1; | |
1129 | result += count1; | |
1130 | buf += count1; | |
1131 | count -= count1; | |
1132 | } | |
1133 | return result; | |
1134 | } | |
1135 | ||
1136 | /** | |
1137 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1138 | * @substream: the rawmidi substream | |
eb7c06e8 YB |
1139 | * |
1140 | * Return: 1 if the internal output buffer is empty, 0 if not. | |
1da177e4 | 1141 | */ |
48c9d417 | 1142 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1143 | { |
48c9d417 | 1144 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1145 | int result; |
1146 | unsigned long flags; | |
1147 | ||
1148 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1149 | rmidi_dbg(substream->rmidi, |
1150 | "snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1da177e4 LT |
1151 | return 1; |
1152 | } | |
1153 | spin_lock_irqsave(&runtime->lock, flags); | |
1154 | result = runtime->avail >= runtime->buffer_size; | |
1155 | spin_unlock_irqrestore(&runtime->lock, flags); | |
5bed9139 | 1156 | return result; |
1da177e4 | 1157 | } |
6776a5d7 | 1158 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1da177e4 LT |
1159 | |
1160 | /** | |
06ab3003 | 1161 | * __snd_rawmidi_transmit_peek - copy data from the internal buffer |
1da177e4 LT |
1162 | * @substream: the rawmidi substream |
1163 | * @buffer: the buffer pointer | |
1164 | * @count: data size to transfer | |
1165 | * | |
06ab3003 | 1166 | * This is a variant of snd_rawmidi_transmit_peek() without spinlock. |
1da177e4 | 1167 | */ |
06ab3003 | 1168 | int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
48c9d417 | 1169 | unsigned char *buffer, int count) |
1da177e4 | 1170 | { |
1da177e4 | 1171 | int result, count1; |
48c9d417 | 1172 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1173 | |
1174 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1175 | rmidi_dbg(substream->rmidi, |
1176 | "snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1da177e4 LT |
1177 | return -EINVAL; |
1178 | } | |
1179 | result = 0; | |
1da177e4 LT |
1180 | if (runtime->avail >= runtime->buffer_size) { |
1181 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1182 | goto __skip; | |
1183 | } | |
1184 | if (count == 1) { /* special case, faster code */ | |
1185 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1186 | result++; | |
1187 | } else { | |
1188 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1189 | if (count1 > count) | |
1190 | count1 = count; | |
1191 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1192 | count1 = runtime->buffer_size - runtime->avail; | |
1193 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1194 | count -= count1; | |
1195 | result += count1; | |
1196 | if (count > 0) { | |
1197 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1198 | count = runtime->buffer_size - runtime->avail - count1; | |
1199 | memcpy(buffer + count1, runtime->buffer, count); | |
1200 | result += count; | |
1201 | } | |
1202 | } | |
1203 | __skip: | |
06ab3003 TI |
1204 | return result; |
1205 | } | |
1206 | EXPORT_SYMBOL(__snd_rawmidi_transmit_peek); | |
1207 | ||
1208 | /** | |
1209 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1210 | * @substream: the rawmidi substream | |
1211 | * @buffer: the buffer pointer | |
1212 | * @count: data size to transfer | |
1213 | * | |
1214 | * Copies data from the internal output buffer to the given buffer. | |
1215 | * | |
1216 | * Call this in the interrupt handler when the midi output is ready, | |
1217 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1218 | * finished. | |
1219 | * | |
1220 | * Return: The size of copied data, or a negative error code on failure. | |
1221 | */ | |
1222 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, | |
1223 | unsigned char *buffer, int count) | |
1224 | { | |
1225 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1226 | int result; | |
1227 | unsigned long flags; | |
1228 | ||
1229 | spin_lock_irqsave(&runtime->lock, flags); | |
1230 | result = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1da177e4 LT |
1231 | spin_unlock_irqrestore(&runtime->lock, flags); |
1232 | return result; | |
1233 | } | |
6776a5d7 | 1234 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1da177e4 LT |
1235 | |
1236 | /** | |
06ab3003 | 1237 | * __snd_rawmidi_transmit_ack - acknowledge the transmission |
1da177e4 | 1238 | * @substream: the rawmidi substream |
0a11458c | 1239 | * @count: the transferred count |
1da177e4 | 1240 | * |
06ab3003 | 1241 | * This is a variant of __snd_rawmidi_transmit_ack() without spinlock. |
1da177e4 | 1242 | */ |
06ab3003 | 1243 | int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 | 1244 | { |
48c9d417 | 1245 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1246 | |
1247 | if (runtime->buffer == NULL) { | |
ca20d292 TI |
1248 | rmidi_dbg(substream->rmidi, |
1249 | "snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1da177e4 LT |
1250 | return -EINVAL; |
1251 | } | |
7eaa943c | 1252 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1253 | runtime->hw_ptr += count; |
1254 | runtime->hw_ptr %= runtime->buffer_size; | |
1255 | runtime->avail += count; | |
1256 | substream->bytes += count; | |
1257 | if (count > 0) { | |
1258 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1259 | wake_up(&runtime->sleep); | |
1260 | } | |
1da177e4 LT |
1261 | return count; |
1262 | } | |
06ab3003 TI |
1263 | EXPORT_SYMBOL(__snd_rawmidi_transmit_ack); |
1264 | ||
1265 | /** | |
1266 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1267 | * @substream: the rawmidi substream | |
1268 | * @count: the transferred count | |
1269 | * | |
1270 | * Advances the hardware pointer for the internal output buffer with | |
1271 | * the given size and updates the condition. | |
1272 | * Call after the transmission is finished. | |
1273 | * | |
1274 | * Return: The advanced size if successful, or a negative error code on failure. | |
1275 | */ | |
1276 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) | |
1277 | { | |
1278 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1279 | int result; | |
1280 | unsigned long flags; | |
1281 | ||
1282 | spin_lock_irqsave(&runtime->lock, flags); | |
1283 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1284 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1285 | return result; | |
1286 | } | |
6776a5d7 | 1287 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1da177e4 LT |
1288 | |
1289 | /** | |
1290 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1291 | * @substream: the rawmidi substream | |
df8db936 | 1292 | * @buffer: the buffer pointer |
1da177e4 | 1293 | * @count: the data size to transfer |
5bed9139 | 1294 | * |
1da177e4 LT |
1295 | * Copies data from the buffer to the device and advances the pointer. |
1296 | * | |
eb7c06e8 | 1297 | * Return: The copied size if successful, or a negative error code on failure. |
1da177e4 | 1298 | */ |
48c9d417 TI |
1299 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1300 | unsigned char *buffer, int count) | |
1da177e4 | 1301 | { |
06ab3003 TI |
1302 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1303 | int result; | |
1304 | unsigned long flags; | |
1305 | ||
1306 | spin_lock_irqsave(&runtime->lock, flags); | |
219df32f | 1307 | if (!substream->opened) |
06ab3003 TI |
1308 | result = -EBADFD; |
1309 | else { | |
1310 | count = __snd_rawmidi_transmit_peek(substream, buffer, count); | |
1311 | if (count <= 0) | |
1312 | result = count; | |
1313 | else | |
1314 | result = __snd_rawmidi_transmit_ack(substream, count); | |
1315 | } | |
1316 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1317 | return result; | |
1da177e4 | 1318 | } |
6776a5d7 | 1319 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1da177e4 | 1320 | |
6aea5702 TI |
1321 | /** |
1322 | * snd_rawmidi_proceed - Discard the all pending bytes and proceed | |
1323 | * @substream: rawmidi substream | |
1324 | * | |
1325 | * Return: the number of discarded bytes | |
1326 | */ | |
1327 | int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream) | |
1328 | { | |
1329 | struct snd_rawmidi_runtime *runtime = substream->runtime; | |
1330 | unsigned long flags; | |
1331 | int count = 0; | |
1332 | ||
1333 | spin_lock_irqsave(&runtime->lock, flags); | |
1334 | if (runtime->avail < runtime->buffer_size) { | |
1335 | count = runtime->buffer_size - runtime->avail; | |
1336 | __snd_rawmidi_transmit_ack(substream, count); | |
1337 | } | |
1338 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1339 | return count; | |
1340 | } | |
1341 | EXPORT_SYMBOL(snd_rawmidi_proceed); | |
1342 | ||
48c9d417 | 1343 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1344 | const unsigned char __user *userbuf, |
1345 | const unsigned char *kernelbuf, | |
1346 | long count) | |
1da177e4 LT |
1347 | { |
1348 | unsigned long flags; | |
1349 | long count1, result; | |
48c9d417 | 1350 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
81f57754 | 1351 | unsigned long appl_ptr; |
1da177e4 | 1352 | |
cc85f7a6 | 1353 | if (!kernelbuf && !userbuf) |
7eaa943c TI |
1354 | return -EINVAL; |
1355 | if (snd_BUG_ON(!runtime->buffer)) | |
1356 | return -EINVAL; | |
1da177e4 LT |
1357 | |
1358 | result = 0; | |
1359 | spin_lock_irqsave(&runtime->lock, flags); | |
1360 | if (substream->append) { | |
1361 | if ((long)runtime->avail < count) { | |
1362 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1363 | return -EAGAIN; | |
1364 | } | |
1365 | } | |
c1f6e3c8 | 1366 | snd_rawmidi_buffer_ref(runtime); |
1da177e4 LT |
1367 | while (count > 0 && runtime->avail > 0) { |
1368 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1369 | if (count1 > count) | |
1370 | count1 = count; | |
1371 | if (count1 > (long)runtime->avail) | |
1372 | count1 = runtime->avail; | |
81f57754 TI |
1373 | |
1374 | /* update runtime->appl_ptr before unlocking for userbuf */ | |
1375 | appl_ptr = runtime->appl_ptr; | |
1376 | runtime->appl_ptr += count1; | |
1377 | runtime->appl_ptr %= runtime->buffer_size; | |
1378 | runtime->avail -= count1; | |
1379 | ||
17596a80 | 1380 | if (kernelbuf) |
81f57754 | 1381 | memcpy(runtime->buffer + appl_ptr, |
17596a80 MÅš |
1382 | kernelbuf + result, count1); |
1383 | else if (userbuf) { | |
1da177e4 | 1384 | spin_unlock_irqrestore(&runtime->lock, flags); |
81f57754 | 1385 | if (copy_from_user(runtime->buffer + appl_ptr, |
17596a80 | 1386 | userbuf + result, count1)) { |
1da177e4 LT |
1387 | spin_lock_irqsave(&runtime->lock, flags); |
1388 | result = result > 0 ? result : -EFAULT; | |
1389 | goto __end; | |
1390 | } | |
1391 | spin_lock_irqsave(&runtime->lock, flags); | |
1392 | } | |
1da177e4 | 1393 | result += count1; |
1da177e4 LT |
1394 | count -= count1; |
1395 | } | |
1396 | __end: | |
1397 | count1 = runtime->avail < runtime->buffer_size; | |
c1f6e3c8 | 1398 | snd_rawmidi_buffer_unref(runtime); |
1da177e4 LT |
1399 | spin_unlock_irqrestore(&runtime->lock, flags); |
1400 | if (count1) | |
1401 | snd_rawmidi_output_trigger(substream, 1); | |
1402 | return result; | |
1403 | } | |
1404 | ||
48c9d417 TI |
1405 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1406 | const unsigned char *buf, long count) | |
1da177e4 | 1407 | { |
17596a80 | 1408 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 | 1409 | } |
6776a5d7 | 1410 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1da177e4 | 1411 | |
48c9d417 TI |
1412 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1413 | size_t count, loff_t *offset) | |
1da177e4 LT |
1414 | { |
1415 | long result, timeout; | |
1416 | int count1; | |
48c9d417 TI |
1417 | struct snd_rawmidi_file *rfile; |
1418 | struct snd_rawmidi_runtime *runtime; | |
1419 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1420 | |
1421 | rfile = file->private_data; | |
1422 | substream = rfile->output; | |
1423 | runtime = substream->runtime; | |
1424 | /* we cannot put an atomic message to our buffer */ | |
1425 | if (substream->append && count > runtime->buffer_size) | |
1426 | return -EIO; | |
1427 | result = 0; | |
1428 | while (count > 0) { | |
1429 | spin_lock_irq(&runtime->lock); | |
1430 | while (!snd_rawmidi_ready_append(substream, count)) { | |
ac6424b9 | 1431 | wait_queue_entry_t wait; |
5bed9139 | 1432 | |
1da177e4 LT |
1433 | if (file->f_flags & O_NONBLOCK) { |
1434 | spin_unlock_irq(&runtime->lock); | |
1435 | return result > 0 ? result : -EAGAIN; | |
1436 | } | |
1437 | init_waitqueue_entry(&wait, current); | |
1438 | add_wait_queue(&runtime->sleep, &wait); | |
1439 | set_current_state(TASK_INTERRUPTIBLE); | |
1440 | spin_unlock_irq(&runtime->lock); | |
1441 | timeout = schedule_timeout(30 * HZ); | |
1442 | remove_wait_queue(&runtime->sleep, &wait); | |
0914f796 TI |
1443 | if (rfile->rmidi->card->shutdown) |
1444 | return -ENODEV; | |
1da177e4 LT |
1445 | if (signal_pending(current)) |
1446 | return result > 0 ? result : -ERESTARTSYS; | |
1447 | if (!runtime->avail && !timeout) | |
1448 | return result > 0 ? result : -EIO; | |
1449 | spin_lock_irq(&runtime->lock); | |
1450 | } | |
1451 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1452 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1453 | if (count1 < 0) |
1454 | return result > 0 ? result : count1; | |
1455 | result += count1; | |
1456 | buf += count1; | |
1457 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1458 | break; | |
1459 | count -= count1; | |
1460 | } | |
6b2f3d1f | 1461 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1462 | spin_lock_irq(&runtime->lock); |
1463 | while (runtime->avail != runtime->buffer_size) { | |
ac6424b9 | 1464 | wait_queue_entry_t wait; |
1da177e4 | 1465 | unsigned int last_avail = runtime->avail; |
5bed9139 | 1466 | |
1da177e4 LT |
1467 | init_waitqueue_entry(&wait, current); |
1468 | add_wait_queue(&runtime->sleep, &wait); | |
1469 | set_current_state(TASK_INTERRUPTIBLE); | |
1470 | spin_unlock_irq(&runtime->lock); | |
1471 | timeout = schedule_timeout(30 * HZ); | |
1472 | remove_wait_queue(&runtime->sleep, &wait); | |
1473 | if (signal_pending(current)) | |
1474 | return result > 0 ? result : -ERESTARTSYS; | |
1475 | if (runtime->avail == last_avail && !timeout) | |
1476 | return result > 0 ? result : -EIO; | |
1477 | spin_lock_irq(&runtime->lock); | |
1478 | } | |
1479 | spin_unlock_irq(&runtime->lock); | |
1480 | } | |
1481 | return result; | |
1482 | } | |
1483 | ||
5bed9139 | 1484 | static __poll_t snd_rawmidi_poll(struct file *file, poll_table *wait) |
1da177e4 | 1485 | { |
48c9d417 TI |
1486 | struct snd_rawmidi_file *rfile; |
1487 | struct snd_rawmidi_runtime *runtime; | |
680ef72a | 1488 | __poll_t mask; |
1da177e4 LT |
1489 | |
1490 | rfile = file->private_data; | |
1491 | if (rfile->input != NULL) { | |
1492 | runtime = rfile->input->runtime; | |
1493 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1494 | poll_wait(file, &runtime->sleep, wait); | |
1495 | } | |
1496 | if (rfile->output != NULL) { | |
1497 | runtime = rfile->output->runtime; | |
1498 | poll_wait(file, &runtime->sleep, wait); | |
1499 | } | |
1500 | mask = 0; | |
1501 | if (rfile->input != NULL) { | |
1502 | if (snd_rawmidi_ready(rfile->input)) | |
a9a08845 | 1503 | mask |= EPOLLIN | EPOLLRDNORM; |
1da177e4 LT |
1504 | } |
1505 | if (rfile->output != NULL) { | |
1506 | if (snd_rawmidi_ready(rfile->output)) | |
a9a08845 | 1507 | mask |= EPOLLOUT | EPOLLWRNORM; |
1da177e4 LT |
1508 | } |
1509 | return mask; | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | */ | |
1514 | #ifdef CONFIG_COMPAT | |
1515 | #include "rawmidi_compat.c" | |
1516 | #else | |
1517 | #define snd_rawmidi_ioctl_compat NULL | |
1518 | #endif | |
1519 | ||
1520 | /* | |
1da177e4 LT |
1521 | */ |
1522 | ||
48c9d417 TI |
1523 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1524 | struct snd_info_buffer *buffer) | |
1da177e4 | 1525 | { |
48c9d417 TI |
1526 | struct snd_rawmidi *rmidi; |
1527 | struct snd_rawmidi_substream *substream; | |
1528 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1529 | |
1530 | rmidi = entry->private_data; | |
1531 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1532 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1533 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1534 | list_for_each_entry(substream, |
1535 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1536 | list) { | |
1da177e4 LT |
1537 | snd_iprintf(buffer, |
1538 | "Output %d\n" | |
1539 | " Tx bytes : %lu\n", | |
1540 | substream->number, | |
1541 | (unsigned long) substream->bytes); | |
1542 | if (substream->opened) { | |
7584af10 CL |
1543 | snd_iprintf(buffer, |
1544 | " Owner PID : %d\n", | |
1545 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1546 | runtime = substream->runtime; |
1547 | snd_iprintf(buffer, | |
1548 | " Mode : %s\n" | |
1549 | " Buffer size : %lu\n" | |
1550 | " Avail : %lu\n", | |
1551 | runtime->oss ? "OSS compatible" : "native", | |
1552 | (unsigned long) runtime->buffer_size, | |
1553 | (unsigned long) runtime->avail); | |
1554 | } | |
1555 | } | |
1556 | } | |
1557 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1558 | list_for_each_entry(substream, |
1559 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1560 | list) { | |
1da177e4 LT |
1561 | snd_iprintf(buffer, |
1562 | "Input %d\n" | |
1563 | " Rx bytes : %lu\n", | |
1564 | substream->number, | |
1565 | (unsigned long) substream->bytes); | |
1566 | if (substream->opened) { | |
7584af10 CL |
1567 | snd_iprintf(buffer, |
1568 | " Owner PID : %d\n", | |
1569 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1570 | runtime = substream->runtime; |
1571 | snd_iprintf(buffer, | |
1572 | " Buffer size : %lu\n" | |
1573 | " Avail : %lu\n" | |
1574 | " Overruns : %lu\n", | |
1575 | (unsigned long) runtime->buffer_size, | |
1576 | (unsigned long) runtime->avail, | |
1577 | (unsigned long) runtime->xruns); | |
1578 | } | |
1579 | } | |
1580 | } | |
1a60d4c5 | 1581 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1582 | } |
1583 | ||
1584 | /* | |
1585 | * Register functions | |
1586 | */ | |
1587 | ||
5bed9139 | 1588 | static const struct file_operations snd_rawmidi_f_ops = { |
1da177e4 LT |
1589 | .owner = THIS_MODULE, |
1590 | .read = snd_rawmidi_read, | |
1591 | .write = snd_rawmidi_write, | |
1592 | .open = snd_rawmidi_open, | |
1593 | .release = snd_rawmidi_release, | |
02f4865f | 1594 | .llseek = no_llseek, |
1da177e4 LT |
1595 | .poll = snd_rawmidi_poll, |
1596 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1597 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1598 | }; | |
1599 | ||
48c9d417 TI |
1600 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1601 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1602 | int direction, |
1603 | int count) | |
1604 | { | |
48c9d417 | 1605 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1606 | int idx; |
1607 | ||
1da177e4 | 1608 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1609 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 1610 | if (!substream) |
1da177e4 LT |
1611 | return -ENOMEM; |
1612 | substream->stream = direction; | |
1613 | substream->number = idx; | |
1614 | substream->rmidi = rmidi; | |
1615 | substream->pstr = stream; | |
1616 | list_add_tail(&substream->list, &stream->substreams); | |
1617 | stream->substream_count++; | |
1618 | } | |
1619 | return 0; | |
1620 | } | |
1621 | ||
aee5012f TI |
1622 | static void release_rawmidi_device(struct device *dev) |
1623 | { | |
1624 | kfree(container_of(dev, struct snd_rawmidi, dev)); | |
1625 | } | |
1626 | ||
1da177e4 LT |
1627 | /** |
1628 | * snd_rawmidi_new - create a rawmidi instance | |
1629 | * @card: the card instance | |
1630 | * @id: the id string | |
1631 | * @device: the device index | |
1632 | * @output_count: the number of output streams | |
1633 | * @input_count: the number of input streams | |
1634 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1635 | * | |
1636 | * Creates a new rawmidi instance. | |
1637 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1638 | * | |
eb7c06e8 | 1639 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1640 | */ |
48c9d417 | 1641 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1642 | int output_count, int input_count, |
5bed9139 | 1643 | struct snd_rawmidi **rrawmidi) |
1da177e4 | 1644 | { |
48c9d417 | 1645 | struct snd_rawmidi *rmidi; |
1da177e4 | 1646 | int err; |
f15ee210 | 1647 | static const struct snd_device_ops ops = { |
1da177e4 LT |
1648 | .dev_free = snd_rawmidi_dev_free, |
1649 | .dev_register = snd_rawmidi_dev_register, | |
1650 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1651 | }; |
1652 | ||
7eaa943c TI |
1653 | if (snd_BUG_ON(!card)) |
1654 | return -ENXIO; | |
1655 | if (rrawmidi) | |
1656 | *rrawmidi = NULL; | |
ca2c0966 | 1657 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
ec0e9937 | 1658 | if (!rmidi) |
1da177e4 LT |
1659 | return -ENOMEM; |
1660 | rmidi->card = card; | |
1661 | rmidi->device = device; | |
1a60d4c5 | 1662 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1663 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1664 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1665 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1666 | ||
1da177e4 LT |
1667 | if (id != NULL) |
1668 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
aee5012f TI |
1669 | |
1670 | snd_device_initialize(&rmidi->dev, card); | |
1671 | rmidi->dev.release = release_rawmidi_device; | |
1672 | dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device); | |
1673 | ||
5bed9139 TI |
1674 | err = snd_rawmidi_alloc_substreams(rmidi, |
1675 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1676 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1677 | input_count); | |
7fdc9b08 TI |
1678 | if (err < 0) |
1679 | goto error; | |
5bed9139 TI |
1680 | err = snd_rawmidi_alloc_substreams(rmidi, |
1681 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1682 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1683 | output_count); | |
7fdc9b08 TI |
1684 | if (err < 0) |
1685 | goto error; | |
5bed9139 | 1686 | err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops); |
7fdc9b08 TI |
1687 | if (err < 0) |
1688 | goto error; | |
1689 | ||
7eaa943c TI |
1690 | if (rrawmidi) |
1691 | *rrawmidi = rmidi; | |
1da177e4 | 1692 | return 0; |
7fdc9b08 TI |
1693 | |
1694 | error: | |
1695 | snd_rawmidi_free(rmidi); | |
1696 | return err; | |
1da177e4 | 1697 | } |
6776a5d7 | 1698 | EXPORT_SYMBOL(snd_rawmidi_new); |
1da177e4 | 1699 | |
48c9d417 | 1700 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1701 | { |
48c9d417 | 1702 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1703 | |
1704 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1705 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1706 | list_del(&substream->list); |
1707 | kfree(substream); | |
1708 | } | |
1709 | } | |
1710 | ||
48c9d417 | 1711 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1712 | { |
7eaa943c TI |
1713 | if (!rmidi) |
1714 | return 0; | |
c461482c TI |
1715 | |
1716 | snd_info_free_entry(rmidi->proc_entry); | |
1717 | rmidi->proc_entry = NULL; | |
1718 | mutex_lock(®ister_mutex); | |
1719 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1720 | rmidi->ops->dev_unregister(rmidi); | |
1721 | mutex_unlock(®ister_mutex); | |
1722 | ||
1da177e4 LT |
1723 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1724 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1725 | if (rmidi->private_free) | |
1726 | rmidi->private_free(rmidi); | |
aee5012f | 1727 | put_device(&rmidi->dev); |
1da177e4 LT |
1728 | return 0; |
1729 | } | |
1730 | ||
48c9d417 | 1731 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1732 | { |
48c9d417 | 1733 | struct snd_rawmidi *rmidi = device->device_data; |
5bed9139 | 1734 | |
1da177e4 LT |
1735 | return snd_rawmidi_free(rmidi); |
1736 | } | |
1737 | ||
111b0cdb | 1738 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
48c9d417 | 1739 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1740 | { |
48c9d417 | 1741 | struct snd_rawmidi *rmidi = device->private_data; |
5bed9139 | 1742 | |
1da177e4 LT |
1743 | rmidi->seq_dev = NULL; |
1744 | } | |
1745 | #endif | |
1746 | ||
48c9d417 | 1747 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1748 | { |
f87135f5 | 1749 | int err; |
48c9d417 | 1750 | struct snd_info_entry *entry; |
1da177e4 | 1751 | char name[16]; |
48c9d417 | 1752 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1753 | |
1754 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1755 | return -ENOMEM; | |
7fdc9b08 | 1756 | err = 0; |
1a60d4c5 | 1757 | mutex_lock(®ister_mutex); |
7fdc9b08 TI |
1758 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) |
1759 | err = -EBUSY; | |
1760 | else | |
1761 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); | |
816f318b | 1762 | mutex_unlock(®ister_mutex); |
7fdc9b08 TI |
1763 | if (err < 0) |
1764 | return err; | |
1765 | ||
40a4b263 TI |
1766 | err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1767 | rmidi->card, rmidi->device, | |
1768 | &snd_rawmidi_f_ops, rmidi, &rmidi->dev); | |
aee5012f TI |
1769 | if (err < 0) { |
1770 | rmidi_err(rmidi, "unable to register\n"); | |
7fdc9b08 | 1771 | goto error; |
1da177e4 | 1772 | } |
7fdc9b08 TI |
1773 | if (rmidi->ops && rmidi->ops->dev_register) { |
1774 | err = rmidi->ops->dev_register(rmidi); | |
1775 | if (err < 0) | |
1776 | goto error_unregister; | |
1da177e4 LT |
1777 | } |
1778 | #ifdef CONFIG_SND_OSSEMUL | |
1779 | rmidi->ossreg = 0; | |
1780 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1781 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1782 | rmidi->card, 0, &snd_rawmidi_f_ops, |
80d7d771 | 1783 | rmidi) < 0) { |
ca20d292 TI |
1784 | rmidi_err(rmidi, |
1785 | "unable to register OSS rawmidi device %i:%i\n", | |
1786 | rmidi->card->number, 0); | |
1da177e4 LT |
1787 | } else { |
1788 | rmidi->ossreg++; | |
1789 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1790 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1791 | #endif | |
1792 | } | |
1793 | } | |
1794 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1795 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 | 1796 | rmidi->card, 1, &snd_rawmidi_f_ops, |
80d7d771 | 1797 | rmidi) < 0) { |
ca20d292 TI |
1798 | rmidi_err(rmidi, |
1799 | "unable to register OSS rawmidi device %i:%i\n", | |
1800 | rmidi->card->number, 1); | |
1da177e4 LT |
1801 | } else { |
1802 | rmidi->ossreg++; | |
1803 | } | |
1804 | } | |
1805 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 LT |
1806 | sprintf(name, "midi%d", rmidi->device); |
1807 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1808 | if (entry) { | |
1809 | entry->private_data = rmidi; | |
1da177e4 LT |
1810 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1811 | if (snd_info_register(entry) < 0) { | |
1812 | snd_info_free_entry(entry); | |
1813 | entry = NULL; | |
1814 | } | |
1815 | } | |
1816 | rmidi->proc_entry = entry; | |
111b0cdb | 1817 | #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
1da177e4 LT |
1818 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
1819 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1820 | rmidi->seq_dev->private_data = rmidi; | |
1821 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1822 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1823 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1824 | } | |
1825 | } | |
1826 | #endif | |
1827 | return 0; | |
7fdc9b08 TI |
1828 | |
1829 | error_unregister: | |
1830 | snd_unregister_device(&rmidi->dev); | |
1831 | error: | |
1832 | mutex_lock(®ister_mutex); | |
1833 | list_del(&rmidi->list); | |
1834 | mutex_unlock(®ister_mutex); | |
1835 | return err; | |
1da177e4 LT |
1836 | } |
1837 | ||
48c9d417 | 1838 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1839 | { |
48c9d417 | 1840 | struct snd_rawmidi *rmidi = device->device_data; |
0914f796 | 1841 | int dir; |
1da177e4 | 1842 | |
1a60d4c5 | 1843 | mutex_lock(®ister_mutex); |
0914f796 TI |
1844 | mutex_lock(&rmidi->open_mutex); |
1845 | wake_up(&rmidi->open_wait); | |
f87135f5 | 1846 | list_del_init(&rmidi->list); |
0914f796 TI |
1847 | for (dir = 0; dir < 2; dir++) { |
1848 | struct snd_rawmidi_substream *s; | |
5bed9139 | 1849 | |
0914f796 TI |
1850 | list_for_each_entry(s, &rmidi->streams[dir].substreams, list) { |
1851 | if (s->runtime) | |
1852 | wake_up(&s->runtime->sleep); | |
1853 | } | |
1854 | } | |
1855 | ||
1da177e4 LT |
1856 | #ifdef CONFIG_SND_OSSEMUL |
1857 | if (rmidi->ossreg) { | |
1858 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1859 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1860 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1861 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1862 | #endif | |
1863 | } | |
1864 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1865 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1866 | rmidi->ossreg = 0; | |
1867 | } | |
1868 | #endif /* CONFIG_SND_OSSEMUL */ | |
40a4b263 | 1869 | snd_unregister_device(&rmidi->dev); |
0914f796 | 1870 | mutex_unlock(&rmidi->open_mutex); |
1a60d4c5 | 1871 | mutex_unlock(®ister_mutex); |
c461482c | 1872 | return 0; |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1877 | * @rmidi: the rawmidi instance | |
1878 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1879 | * @ops: the operator table | |
1880 | * | |
1881 | * Sets the rawmidi operators for the given stream direction. | |
1882 | */ | |
48c9d417 | 1883 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
6ba79b85 | 1884 | const struct snd_rawmidi_ops *ops) |
1da177e4 | 1885 | { |
48c9d417 | 1886 | struct snd_rawmidi_substream *substream; |
5bed9139 | 1887 | |
9244b2c3 | 1888 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1889 | substream->ops = ops; |
1da177e4 | 1890 | } |
6776a5d7 | 1891 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1da177e4 LT |
1892 | |
1893 | /* | |
1894 | * ENTRY functions | |
1895 | */ | |
1896 | ||
1897 | static int __init alsa_rawmidi_init(void) | |
1898 | { | |
1899 | ||
1900 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1901 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1902 | #ifdef CONFIG_SND_OSSEMUL | |
1903 | { int i; | |
1904 | /* check device map table */ | |
1905 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1906 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1907 | pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n", |
1908 | i, midi_map[i]); | |
1da177e4 LT |
1909 | midi_map[i] = 0; |
1910 | } | |
1911 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
ca20d292 TI |
1912 | pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n", |
1913 | i, amidi_map[i]); | |
1da177e4 LT |
1914 | amidi_map[i] = 1; |
1915 | } | |
1916 | } | |
1917 | } | |
1918 | #endif /* CONFIG_SND_OSSEMUL */ | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | static void __exit alsa_rawmidi_exit(void) | |
1923 | { | |
1924 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1925 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1926 | } | |
1927 | ||
1928 | module_init(alsa_rawmidi_init) | |
1929 | module_exit(alsa_rawmidi_exit) |