]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Digital Audio (PCM) abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/mm.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/file.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sched/signal.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/pm_qos.h> | |
29 | #include <linux/io.h> | |
30 | #include <linux/dma-mapping.h> | |
31 | #include <sound/core.h> | |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/timer.h> | |
37 | #include <sound/minors.h> | |
38 | #include <linux/uio.h> | |
39 | ||
40 | #include "pcm_local.h" | |
41 | ||
42 | #ifdef CONFIG_SND_DEBUG | |
43 | #define CREATE_TRACE_POINTS | |
44 | #include "pcm_param_trace.h" | |
45 | #else | |
46 | #define trace_hw_mask_param_enabled() 0 | |
47 | #define trace_hw_interval_param_enabled() 0 | |
48 | #define trace_hw_mask_param(substream, type, index, prev, curr) | |
49 | #define trace_hw_interval_param(substream, type, index, prev, curr) | |
50 | #endif | |
51 | ||
52 | /* | |
53 | * Compatibility | |
54 | */ | |
55 | ||
56 | struct snd_pcm_hw_params_old { | |
57 | unsigned int flags; | |
58 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
59 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
60 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - | |
61 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; | |
62 | unsigned int rmask; | |
63 | unsigned int cmask; | |
64 | unsigned int info; | |
65 | unsigned int msbits; | |
66 | unsigned int rate_num; | |
67 | unsigned int rate_den; | |
68 | snd_pcm_uframes_t fifo_size; | |
69 | unsigned char reserved[64]; | |
70 | }; | |
71 | ||
72 | #ifdef CONFIG_SND_SUPPORT_OLD_API | |
73 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) | |
74 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
75 | ||
76 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, | |
77 | struct snd_pcm_hw_params_old __user * _oparams); | |
78 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
79 | struct snd_pcm_hw_params_old __user * _oparams); | |
80 | #endif | |
81 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); | |
82 | ||
83 | /* | |
84 | * | |
85 | */ | |
86 | ||
87 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); | |
88 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
89 | ||
90 | /* Writer in rwsem may block readers even during its waiting in queue, | |
91 | * and this may lead to a deadlock when the code path takes read sem | |
92 | * twice (e.g. one in snd_pcm_action_nonatomic() and another in | |
93 | * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to | |
94 | * spin until it gets the lock. | |
95 | */ | |
96 | static inline void down_write_nonblock(struct rw_semaphore *lock) | |
97 | { | |
98 | while (!down_write_trylock(lock)) | |
99 | cond_resched(); | |
100 | } | |
101 | ||
102 | /** | |
103 | * snd_pcm_stream_lock - Lock the PCM stream | |
104 | * @substream: PCM substream | |
105 | * | |
106 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
107 | * flag of the given substream. This also takes the global link rw lock | |
108 | * (or rw sem), too, for avoiding the race with linked streams. | |
109 | */ | |
110 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) | |
111 | { | |
112 | if (substream->pcm->nonatomic) { | |
113 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); | |
114 | mutex_lock(&substream->self_group.mutex); | |
115 | } else { | |
116 | read_lock(&snd_pcm_link_rwlock); | |
117 | spin_lock(&substream->self_group.lock); | |
118 | } | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
121 | ||
122 | /** | |
123 | * snd_pcm_stream_lock - Unlock the PCM stream | |
124 | * @substream: PCM substream | |
125 | * | |
126 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
127 | */ | |
128 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) | |
129 | { | |
130 | if (substream->pcm->nonatomic) { | |
131 | mutex_unlock(&substream->self_group.mutex); | |
132 | up_read(&snd_pcm_link_rwsem); | |
133 | } else { | |
134 | spin_unlock(&substream->self_group.lock); | |
135 | read_unlock(&snd_pcm_link_rwlock); | |
136 | } | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
139 | ||
140 | /** | |
141 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
142 | * @substream: PCM substream | |
143 | * | |
144 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
145 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
146 | * as snd_pcm_stream_lock(). | |
147 | */ | |
148 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) | |
149 | { | |
150 | if (!substream->pcm->nonatomic) | |
151 | local_irq_disable(); | |
152 | snd_pcm_stream_lock(substream); | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
155 | ||
156 | /** | |
157 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
158 | * @substream: PCM substream | |
159 | * | |
160 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
161 | */ | |
162 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) | |
163 | { | |
164 | snd_pcm_stream_unlock(substream); | |
165 | if (!substream->pcm->nonatomic) | |
166 | local_irq_enable(); | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
169 | ||
170 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
171 | { | |
172 | unsigned long flags = 0; | |
173 | if (!substream->pcm->nonatomic) | |
174 | local_irq_save(flags); | |
175 | snd_pcm_stream_lock(substream); | |
176 | return flags; | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
179 | ||
180 | /** | |
181 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
182 | * @substream: PCM substream | |
183 | * @flags: irq flags | |
184 | * | |
185 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
186 | */ | |
187 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, | |
188 | unsigned long flags) | |
189 | { | |
190 | snd_pcm_stream_unlock(substream); | |
191 | if (!substream->pcm->nonatomic) | |
192 | local_irq_restore(flags); | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
195 | ||
196 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) | |
197 | { | |
198 | struct snd_pcm_runtime *runtime; | |
199 | struct snd_pcm *pcm = substream->pcm; | |
200 | struct snd_pcm_str *pstr = substream->pstr; | |
201 | ||
202 | memset(info, 0, sizeof(*info)); | |
203 | info->card = pcm->card->number; | |
204 | info->device = pcm->device; | |
205 | info->stream = substream->stream; | |
206 | info->subdevice = substream->number; | |
207 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
208 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
209 | info->dev_class = pcm->dev_class; | |
210 | info->dev_subclass = pcm->dev_subclass; | |
211 | info->subdevices_count = pstr->substream_count; | |
212 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
213 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
214 | runtime = substream->runtime; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | int snd_pcm_info_user(struct snd_pcm_substream *substream, | |
220 | struct snd_pcm_info __user * _info) | |
221 | { | |
222 | struct snd_pcm_info *info; | |
223 | int err; | |
224 | ||
225 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
226 | if (! info) | |
227 | return -ENOMEM; | |
228 | err = snd_pcm_info(substream, info); | |
229 | if (err >= 0) { | |
230 | if (copy_to_user(_info, info, sizeof(*info))) | |
231 | err = -EFAULT; | |
232 | } | |
233 | kfree(info); | |
234 | return err; | |
235 | } | |
236 | ||
237 | static bool hw_support_mmap(struct snd_pcm_substream *substream) | |
238 | { | |
239 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
240 | return false; | |
241 | /* architecture supports dma_mmap_coherent()? */ | |
242 | #if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA) | |
243 | if (!substream->ops->mmap && | |
244 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
245 | return false; | |
246 | #endif | |
247 | return true; | |
248 | } | |
249 | ||
250 | static int constrain_mask_params(struct snd_pcm_substream *substream, | |
251 | struct snd_pcm_hw_params *params) | |
252 | { | |
253 | struct snd_pcm_hw_constraints *constrs = | |
254 | &substream->runtime->hw_constraints; | |
255 | struct snd_mask *m; | |
256 | unsigned int k; | |
257 | struct snd_mask old_mask; | |
258 | int changed; | |
259 | ||
260 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
261 | m = hw_param_mask(params, k); | |
262 | if (snd_mask_empty(m)) | |
263 | return -EINVAL; | |
264 | ||
265 | /* This parameter is not requested to change by a caller. */ | |
266 | if (!(params->rmask & (1 << k))) | |
267 | continue; | |
268 | ||
269 | if (trace_hw_mask_param_enabled()) | |
270 | old_mask = *m; | |
271 | ||
272 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
273 | if (changed < 0) | |
274 | return changed; | |
275 | if (changed == 0) | |
276 | continue; | |
277 | ||
278 | /* Set corresponding flag so that the caller gets it. */ | |
279 | trace_hw_mask_param(substream, k, 0, &old_mask, m); | |
280 | params->cmask |= 1 << k; | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | static int constrain_interval_params(struct snd_pcm_substream *substream, | |
287 | struct snd_pcm_hw_params *params) | |
288 | { | |
289 | struct snd_pcm_hw_constraints *constrs = | |
290 | &substream->runtime->hw_constraints; | |
291 | struct snd_interval *i; | |
292 | unsigned int k; | |
293 | struct snd_interval old_interval; | |
294 | int changed; | |
295 | ||
296 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
297 | i = hw_param_interval(params, k); | |
298 | if (snd_interval_empty(i)) | |
299 | return -EINVAL; | |
300 | ||
301 | /* This parameter is not requested to change by a caller. */ | |
302 | if (!(params->rmask & (1 << k))) | |
303 | continue; | |
304 | ||
305 | if (trace_hw_interval_param_enabled()) | |
306 | old_interval = *i; | |
307 | ||
308 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
309 | if (changed < 0) | |
310 | return changed; | |
311 | if (changed == 0) | |
312 | continue; | |
313 | ||
314 | /* Set corresponding flag so that the caller gets it. */ | |
315 | trace_hw_interval_param(substream, k, 0, &old_interval, i); | |
316 | params->cmask |= 1 << k; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int constrain_params_by_rules(struct snd_pcm_substream *substream, | |
323 | struct snd_pcm_hw_params *params) | |
324 | { | |
325 | struct snd_pcm_hw_constraints *constrs = | |
326 | &substream->runtime->hw_constraints; | |
327 | unsigned int k; | |
328 | unsigned int rstamps[constrs->rules_num]; | |
329 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
330 | unsigned int stamp; | |
331 | struct snd_pcm_hw_rule *r; | |
332 | unsigned int d; | |
333 | struct snd_mask old_mask; | |
334 | struct snd_interval old_interval; | |
335 | bool again; | |
336 | int changed; | |
337 | ||
338 | /* | |
339 | * Each application of rule has own sequence number. | |
340 | * | |
341 | * Each member of 'rstamps' array represents the sequence number of | |
342 | * recent application of corresponding rule. | |
343 | */ | |
344 | for (k = 0; k < constrs->rules_num; k++) | |
345 | rstamps[k] = 0; | |
346 | ||
347 | /* | |
348 | * Each member of 'vstamps' array represents the sequence number of | |
349 | * recent application of rule in which corresponding parameters were | |
350 | * changed. | |
351 | * | |
352 | * In initial state, elements corresponding to parameters requested by | |
353 | * a caller is 1. For unrequested parameters, corresponding members | |
354 | * have 0 so that the parameters are never changed anymore. | |
355 | */ | |
356 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
357 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
358 | ||
359 | /* Due to the above design, actual sequence number starts at 2. */ | |
360 | stamp = 2; | |
361 | retry: | |
362 | /* Apply all rules in order. */ | |
363 | again = false; | |
364 | for (k = 0; k < constrs->rules_num; k++) { | |
365 | r = &constrs->rules[k]; | |
366 | ||
367 | /* | |
368 | * Check condition bits of this rule. When the rule has | |
369 | * some condition bits, parameter without the bits is | |
370 | * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP | |
371 | * is an example of the condition bits. | |
372 | */ | |
373 | if (r->cond && !(r->cond & params->flags)) | |
374 | continue; | |
375 | ||
376 | /* | |
377 | * The 'deps' array includes maximum three dependencies | |
378 | * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth | |
379 | * member of this array is a sentinel and should be | |
380 | * negative value. | |
381 | * | |
382 | * This rule should be processed in this time when dependent | |
383 | * parameters were changed at former applications of the other | |
384 | * rules. | |
385 | */ | |
386 | for (d = 0; r->deps[d] >= 0; d++) { | |
387 | if (vstamps[r->deps[d]] > rstamps[k]) | |
388 | break; | |
389 | } | |
390 | if (r->deps[d] < 0) | |
391 | continue; | |
392 | ||
393 | if (trace_hw_mask_param_enabled()) { | |
394 | if (hw_is_mask(r->var)) | |
395 | old_mask = *hw_param_mask(params, r->var); | |
396 | } | |
397 | if (trace_hw_interval_param_enabled()) { | |
398 | if (hw_is_interval(r->var)) | |
399 | old_interval = *hw_param_interval(params, r->var); | |
400 | } | |
401 | ||
402 | changed = r->func(params, r); | |
403 | if (changed < 0) | |
404 | return changed; | |
405 | ||
406 | /* | |
407 | * When the parameter is changed, notify it to the caller | |
408 | * by corresponding returned bit, then preparing for next | |
409 | * iteration. | |
410 | */ | |
411 | if (changed && r->var >= 0) { | |
412 | if (hw_is_mask(r->var)) { | |
413 | trace_hw_mask_param(substream, r->var, | |
414 | k + 1, &old_mask, | |
415 | hw_param_mask(params, r->var)); | |
416 | } | |
417 | if (hw_is_interval(r->var)) { | |
418 | trace_hw_interval_param(substream, r->var, | |
419 | k + 1, &old_interval, | |
420 | hw_param_interval(params, r->var)); | |
421 | } | |
422 | ||
423 | params->cmask |= (1 << r->var); | |
424 | vstamps[r->var] = stamp; | |
425 | again = true; | |
426 | } | |
427 | ||
428 | rstamps[k] = stamp++; | |
429 | } | |
430 | ||
431 | /* Iterate to evaluate all rules till no parameters are changed. */ | |
432 | if (again) | |
433 | goto retry; | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
438 | static int fixup_unreferenced_params(struct snd_pcm_substream *substream, | |
439 | struct snd_pcm_hw_params *params) | |
440 | { | |
441 | const struct snd_interval *i; | |
442 | const struct snd_mask *m; | |
443 | int err; | |
444 | ||
445 | if (!params->msbits) { | |
446 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
447 | if (snd_interval_single(i)) | |
448 | params->msbits = snd_interval_value(i); | |
449 | } | |
450 | ||
451 | if (!params->rate_den) { | |
452 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); | |
453 | if (snd_interval_single(i)) { | |
454 | params->rate_num = snd_interval_value(i); | |
455 | params->rate_den = 1; | |
456 | } | |
457 | } | |
458 | ||
459 | if (!params->fifo_size) { | |
460 | m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
461 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
462 | if (snd_mask_single(m) && snd_interval_single(i)) { | |
463 | err = substream->ops->ioctl(substream, | |
464 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
465 | if (err < 0) | |
466 | return err; | |
467 | } | |
468 | } | |
469 | ||
470 | if (!params->info) { | |
471 | params->info = substream->runtime->hw.info; | |
472 | params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | | |
473 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
474 | if (!hw_support_mmap(substream)) | |
475 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
476 | SNDRV_PCM_INFO_MMAP_VALID); | |
477 | } | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, | |
483 | struct snd_pcm_hw_params *params) | |
484 | { | |
485 | int err; | |
486 | ||
487 | params->info = 0; | |
488 | params->fifo_size = 0; | |
489 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
490 | params->msbits = 0; | |
491 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
492 | params->rate_num = 0; | |
493 | params->rate_den = 0; | |
494 | } | |
495 | ||
496 | err = constrain_mask_params(substream, params); | |
497 | if (err < 0) | |
498 | return err; | |
499 | ||
500 | err = constrain_interval_params(substream, params); | |
501 | if (err < 0) | |
502 | return err; | |
503 | ||
504 | err = constrain_params_by_rules(substream, params); | |
505 | if (err < 0) | |
506 | return err; | |
507 | ||
508 | params->rmask = 0; | |
509 | ||
510 | return 0; | |
511 | } | |
512 | EXPORT_SYMBOL(snd_pcm_hw_refine); | |
513 | ||
514 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, | |
515 | struct snd_pcm_hw_params __user * _params) | |
516 | { | |
517 | struct snd_pcm_hw_params *params; | |
518 | int err; | |
519 | ||
520 | params = memdup_user(_params, sizeof(*params)); | |
521 | if (IS_ERR(params)) | |
522 | return PTR_ERR(params); | |
523 | ||
524 | err = snd_pcm_hw_refine(substream, params); | |
525 | if (err < 0) | |
526 | goto end; | |
527 | ||
528 | err = fixup_unreferenced_params(substream, params); | |
529 | if (err < 0) | |
530 | goto end; | |
531 | ||
532 | if (copy_to_user(_params, params, sizeof(*params))) | |
533 | err = -EFAULT; | |
534 | end: | |
535 | kfree(params); | |
536 | return err; | |
537 | } | |
538 | ||
539 | static int period_to_usecs(struct snd_pcm_runtime *runtime) | |
540 | { | |
541 | int usecs; | |
542 | ||
543 | if (! runtime->rate) | |
544 | return -1; /* invalid */ | |
545 | ||
546 | /* take 75% of period time as the deadline */ | |
547 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
548 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
549 | runtime->rate; | |
550 | ||
551 | return usecs; | |
552 | } | |
553 | ||
554 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) | |
555 | { | |
556 | snd_pcm_stream_lock_irq(substream); | |
557 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
558 | substream->runtime->status->state = state; | |
559 | snd_pcm_stream_unlock_irq(substream); | |
560 | } | |
561 | ||
562 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, | |
563 | int event) | |
564 | { | |
565 | #ifdef CONFIG_SND_PCM_TIMER | |
566 | if (substream->timer) | |
567 | snd_timer_notify(substream->timer, event, | |
568 | &substream->runtime->trigger_tstamp); | |
569 | #endif | |
570 | } | |
571 | ||
572 | /** | |
573 | * snd_pcm_hw_param_choose - choose a configuration defined by @params | |
574 | * @pcm: PCM instance | |
575 | * @params: the hw_params instance | |
576 | * | |
577 | * Choose one configuration from configuration space defined by @params. | |
578 | * The configuration chosen is that obtained fixing in this order: | |
579 | * first access, first format, first subformat, min channels, | |
580 | * min rate, min period time, max buffer size, min tick time | |
581 | * | |
582 | * Return: Zero if successful, or a negative error code on failure. | |
583 | */ | |
584 | static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, | |
585 | struct snd_pcm_hw_params *params) | |
586 | { | |
587 | static const int vars[] = { | |
588 | SNDRV_PCM_HW_PARAM_ACCESS, | |
589 | SNDRV_PCM_HW_PARAM_FORMAT, | |
590 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
591 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
592 | SNDRV_PCM_HW_PARAM_RATE, | |
593 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
594 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
595 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
596 | -1 | |
597 | }; | |
598 | const int *v; | |
599 | struct snd_mask old_mask; | |
600 | struct snd_interval old_interval; | |
601 | int changed; | |
602 | ||
603 | for (v = vars; *v != -1; v++) { | |
604 | /* Keep old parameter to trace. */ | |
605 | if (trace_hw_mask_param_enabled()) { | |
606 | if (hw_is_mask(*v)) | |
607 | old_mask = *hw_param_mask(params, *v); | |
608 | } | |
609 | if (trace_hw_interval_param_enabled()) { | |
610 | if (hw_is_interval(*v)) | |
611 | old_interval = *hw_param_interval(params, *v); | |
612 | } | |
613 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
614 | changed = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
615 | else | |
616 | changed = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
617 | if (snd_BUG_ON(changed < 0)) | |
618 | return changed; | |
619 | if (changed == 0) | |
620 | continue; | |
621 | ||
622 | /* Trace the changed parameter. */ | |
623 | if (hw_is_mask(*v)) { | |
624 | trace_hw_mask_param(pcm, *v, 0, &old_mask, | |
625 | hw_param_mask(params, *v)); | |
626 | } | |
627 | if (hw_is_interval(*v)) { | |
628 | trace_hw_interval_param(pcm, *v, 0, &old_interval, | |
629 | hw_param_interval(params, *v)); | |
630 | } | |
631 | } | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, | |
637 | struct snd_pcm_hw_params *params) | |
638 | { | |
639 | struct snd_pcm_runtime *runtime; | |
640 | int err, usecs; | |
641 | unsigned int bits; | |
642 | snd_pcm_uframes_t frames; | |
643 | ||
644 | if (PCM_RUNTIME_CHECK(substream)) | |
645 | return -ENXIO; | |
646 | runtime = substream->runtime; | |
647 | snd_pcm_stream_lock_irq(substream); | |
648 | switch (runtime->status->state) { | |
649 | case SNDRV_PCM_STATE_OPEN: | |
650 | case SNDRV_PCM_STATE_SETUP: | |
651 | case SNDRV_PCM_STATE_PREPARED: | |
652 | break; | |
653 | default: | |
654 | snd_pcm_stream_unlock_irq(substream); | |
655 | return -EBADFD; | |
656 | } | |
657 | snd_pcm_stream_unlock_irq(substream); | |
658 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) | |
659 | if (!substream->oss.oss) | |
660 | #endif | |
661 | if (atomic_read(&substream->mmap_count)) | |
662 | return -EBADFD; | |
663 | ||
664 | params->rmask = ~0U; | |
665 | err = snd_pcm_hw_refine(substream, params); | |
666 | if (err < 0) | |
667 | goto _error; | |
668 | ||
669 | err = snd_pcm_hw_params_choose(substream, params); | |
670 | if (err < 0) | |
671 | goto _error; | |
672 | ||
673 | err = fixup_unreferenced_params(substream, params); | |
674 | if (err < 0) | |
675 | goto _error; | |
676 | ||
677 | if (substream->ops->hw_params != NULL) { | |
678 | err = substream->ops->hw_params(substream, params); | |
679 | if (err < 0) | |
680 | goto _error; | |
681 | } | |
682 | ||
683 | runtime->access = params_access(params); | |
684 | runtime->format = params_format(params); | |
685 | runtime->subformat = params_subformat(params); | |
686 | runtime->channels = params_channels(params); | |
687 | runtime->rate = params_rate(params); | |
688 | runtime->period_size = params_period_size(params); | |
689 | runtime->periods = params_periods(params); | |
690 | runtime->buffer_size = params_buffer_size(params); | |
691 | runtime->info = params->info; | |
692 | runtime->rate_num = params->rate_num; | |
693 | runtime->rate_den = params->rate_den; | |
694 | runtime->no_period_wakeup = | |
695 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
696 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
697 | ||
698 | bits = snd_pcm_format_physical_width(runtime->format); | |
699 | runtime->sample_bits = bits; | |
700 | bits *= runtime->channels; | |
701 | runtime->frame_bits = bits; | |
702 | frames = 1; | |
703 | while (bits % 8 != 0) { | |
704 | bits *= 2; | |
705 | frames *= 2; | |
706 | } | |
707 | runtime->byte_align = bits / 8; | |
708 | runtime->min_align = frames; | |
709 | ||
710 | /* Default sw params */ | |
711 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
712 | runtime->period_step = 1; | |
713 | runtime->control->avail_min = runtime->period_size; | |
714 | runtime->start_threshold = 1; | |
715 | runtime->stop_threshold = runtime->buffer_size; | |
716 | runtime->silence_threshold = 0; | |
717 | runtime->silence_size = 0; | |
718 | runtime->boundary = runtime->buffer_size; | |
719 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
720 | runtime->boundary *= 2; | |
721 | ||
722 | snd_pcm_timer_resolution_change(substream); | |
723 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); | |
724 | ||
725 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) | |
726 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
727 | if ((usecs = period_to_usecs(runtime)) >= 0) | |
728 | pm_qos_add_request(&substream->latency_pm_qos_req, | |
729 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
730 | return 0; | |
731 | _error: | |
732 | /* hardware might be unusable from this time, | |
733 | so we force application to retry to set | |
734 | the correct hardware parameter settings */ | |
735 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); | |
736 | if (substream->ops->hw_free != NULL) | |
737 | substream->ops->hw_free(substream); | |
738 | return err; | |
739 | } | |
740 | ||
741 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, | |
742 | struct snd_pcm_hw_params __user * _params) | |
743 | { | |
744 | struct snd_pcm_hw_params *params; | |
745 | int err; | |
746 | ||
747 | params = memdup_user(_params, sizeof(*params)); | |
748 | if (IS_ERR(params)) | |
749 | return PTR_ERR(params); | |
750 | ||
751 | err = snd_pcm_hw_params(substream, params); | |
752 | if (err < 0) | |
753 | goto end; | |
754 | ||
755 | if (copy_to_user(_params, params, sizeof(*params))) | |
756 | err = -EFAULT; | |
757 | end: | |
758 | kfree(params); | |
759 | return err; | |
760 | } | |
761 | ||
762 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) | |
763 | { | |
764 | struct snd_pcm_runtime *runtime; | |
765 | int result = 0; | |
766 | ||
767 | if (PCM_RUNTIME_CHECK(substream)) | |
768 | return -ENXIO; | |
769 | runtime = substream->runtime; | |
770 | snd_pcm_stream_lock_irq(substream); | |
771 | switch (runtime->status->state) { | |
772 | case SNDRV_PCM_STATE_SETUP: | |
773 | case SNDRV_PCM_STATE_PREPARED: | |
774 | break; | |
775 | default: | |
776 | snd_pcm_stream_unlock_irq(substream); | |
777 | return -EBADFD; | |
778 | } | |
779 | snd_pcm_stream_unlock_irq(substream); | |
780 | if (atomic_read(&substream->mmap_count)) | |
781 | return -EBADFD; | |
782 | if (substream->ops->hw_free) | |
783 | result = substream->ops->hw_free(substream); | |
784 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); | |
785 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
786 | return result; | |
787 | } | |
788 | ||
789 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, | |
790 | struct snd_pcm_sw_params *params) | |
791 | { | |
792 | struct snd_pcm_runtime *runtime; | |
793 | int err; | |
794 | ||
795 | if (PCM_RUNTIME_CHECK(substream)) | |
796 | return -ENXIO; | |
797 | runtime = substream->runtime; | |
798 | snd_pcm_stream_lock_irq(substream); | |
799 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
800 | snd_pcm_stream_unlock_irq(substream); | |
801 | return -EBADFD; | |
802 | } | |
803 | snd_pcm_stream_unlock_irq(substream); | |
804 | ||
805 | if (params->tstamp_mode < 0 || | |
806 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
807 | return -EINVAL; | |
808 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && | |
809 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
810 | return -EINVAL; | |
811 | if (params->avail_min == 0) | |
812 | return -EINVAL; | |
813 | if (params->silence_size >= runtime->boundary) { | |
814 | if (params->silence_threshold != 0) | |
815 | return -EINVAL; | |
816 | } else { | |
817 | if (params->silence_size > params->silence_threshold) | |
818 | return -EINVAL; | |
819 | if (params->silence_threshold > runtime->buffer_size) | |
820 | return -EINVAL; | |
821 | } | |
822 | err = 0; | |
823 | snd_pcm_stream_lock_irq(substream); | |
824 | runtime->tstamp_mode = params->tstamp_mode; | |
825 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) | |
826 | runtime->tstamp_type = params->tstamp_type; | |
827 | runtime->period_step = params->period_step; | |
828 | runtime->control->avail_min = params->avail_min; | |
829 | runtime->start_threshold = params->start_threshold; | |
830 | runtime->stop_threshold = params->stop_threshold; | |
831 | runtime->silence_threshold = params->silence_threshold; | |
832 | runtime->silence_size = params->silence_size; | |
833 | params->boundary = runtime->boundary; | |
834 | if (snd_pcm_running(substream)) { | |
835 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
836 | runtime->silence_size > 0) | |
837 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
838 | err = snd_pcm_update_state(substream, runtime); | |
839 | } | |
840 | snd_pcm_stream_unlock_irq(substream); | |
841 | return err; | |
842 | } | |
843 | ||
844 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, | |
845 | struct snd_pcm_sw_params __user * _params) | |
846 | { | |
847 | struct snd_pcm_sw_params params; | |
848 | int err; | |
849 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
850 | return -EFAULT; | |
851 | err = snd_pcm_sw_params(substream, ¶ms); | |
852 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
853 | return -EFAULT; | |
854 | return err; | |
855 | } | |
856 | ||
857 | int snd_pcm_status(struct snd_pcm_substream *substream, | |
858 | struct snd_pcm_status *status) | |
859 | { | |
860 | struct snd_pcm_runtime *runtime = substream->runtime; | |
861 | ||
862 | snd_pcm_stream_lock_irq(substream); | |
863 | ||
864 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
865 | &runtime->audio_tstamp_config); | |
866 | ||
867 | /* backwards compatible behavior */ | |
868 | if (runtime->audio_tstamp_config.type_requested == | |
869 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
870 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
871 | runtime->audio_tstamp_config.type_requested = | |
872 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
873 | else | |
874 | runtime->audio_tstamp_config.type_requested = | |
875 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
876 | runtime->audio_tstamp_report.valid = 0; | |
877 | } else | |
878 | runtime->audio_tstamp_report.valid = 1; | |
879 | ||
880 | status->state = runtime->status->state; | |
881 | status->suspended_state = runtime->status->suspended_state; | |
882 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
883 | goto _end; | |
884 | status->trigger_tstamp = runtime->trigger_tstamp; | |
885 | if (snd_pcm_running(substream)) { | |
886 | snd_pcm_update_hw_ptr(substream); | |
887 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { | |
888 | status->tstamp = runtime->status->tstamp; | |
889 | status->driver_tstamp = runtime->driver_tstamp; | |
890 | status->audio_tstamp = | |
891 | runtime->status->audio_tstamp; | |
892 | if (runtime->audio_tstamp_report.valid == 1) | |
893 | /* backwards compatibility, no report provided in COMPAT mode */ | |
894 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
895 | &status->audio_tstamp_accuracy, | |
896 | &runtime->audio_tstamp_report); | |
897 | ||
898 | goto _tstamp_end; | |
899 | } | |
900 | } else { | |
901 | /* get tstamp only in fallback mode and only if enabled */ | |
902 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
903 | snd_pcm_gettime(runtime, &status->tstamp); | |
904 | } | |
905 | _tstamp_end: | |
906 | status->appl_ptr = runtime->control->appl_ptr; | |
907 | status->hw_ptr = runtime->status->hw_ptr; | |
908 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
909 | status->avail = snd_pcm_playback_avail(runtime); | |
910 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
911 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
912 | status->delay = runtime->buffer_size - status->avail; | |
913 | status->delay += runtime->delay; | |
914 | } else | |
915 | status->delay = 0; | |
916 | } else { | |
917 | status->avail = snd_pcm_capture_avail(runtime); | |
918 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
919 | status->delay = status->avail + runtime->delay; | |
920 | else | |
921 | status->delay = 0; | |
922 | } | |
923 | status->avail_max = runtime->avail_max; | |
924 | status->overrange = runtime->overrange; | |
925 | runtime->avail_max = 0; | |
926 | runtime->overrange = 0; | |
927 | _end: | |
928 | snd_pcm_stream_unlock_irq(substream); | |
929 | return 0; | |
930 | } | |
931 | ||
932 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, | |
933 | struct snd_pcm_status __user * _status, | |
934 | bool ext) | |
935 | { | |
936 | struct snd_pcm_status status; | |
937 | int res; | |
938 | ||
939 | memset(&status, 0, sizeof(status)); | |
940 | /* | |
941 | * with extension, parameters are read/write, | |
942 | * get audio_tstamp_data from user, | |
943 | * ignore rest of status structure | |
944 | */ | |
945 | if (ext && get_user(status.audio_tstamp_data, | |
946 | (u32 __user *)(&_status->audio_tstamp_data))) | |
947 | return -EFAULT; | |
948 | res = snd_pcm_status(substream, &status); | |
949 | if (res < 0) | |
950 | return res; | |
951 | if (copy_to_user(_status, &status, sizeof(status))) | |
952 | return -EFAULT; | |
953 | return 0; | |
954 | } | |
955 | ||
956 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, | |
957 | struct snd_pcm_channel_info * info) | |
958 | { | |
959 | struct snd_pcm_runtime *runtime; | |
960 | unsigned int channel; | |
961 | ||
962 | channel = info->channel; | |
963 | runtime = substream->runtime; | |
964 | snd_pcm_stream_lock_irq(substream); | |
965 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
966 | snd_pcm_stream_unlock_irq(substream); | |
967 | return -EBADFD; | |
968 | } | |
969 | snd_pcm_stream_unlock_irq(substream); | |
970 | if (channel >= runtime->channels) | |
971 | return -EINVAL; | |
972 | memset(info, 0, sizeof(*info)); | |
973 | info->channel = channel; | |
974 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
975 | } | |
976 | ||
977 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, | |
978 | struct snd_pcm_channel_info __user * _info) | |
979 | { | |
980 | struct snd_pcm_channel_info info; | |
981 | int res; | |
982 | ||
983 | if (copy_from_user(&info, _info, sizeof(info))) | |
984 | return -EFAULT; | |
985 | res = snd_pcm_channel_info(substream, &info); | |
986 | if (res < 0) | |
987 | return res; | |
988 | if (copy_to_user(_info, &info, sizeof(info))) | |
989 | return -EFAULT; | |
990 | return 0; | |
991 | } | |
992 | ||
993 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) | |
994 | { | |
995 | struct snd_pcm_runtime *runtime = substream->runtime; | |
996 | if (runtime->trigger_master == NULL) | |
997 | return; | |
998 | if (runtime->trigger_master == substream) { | |
999 | if (!runtime->trigger_tstamp_latched) | |
1000 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1001 | } else { | |
1002 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
1003 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
1004 | } | |
1005 | runtime->trigger_master = NULL; | |
1006 | } | |
1007 | ||
1008 | struct action_ops { | |
1009 | int (*pre_action)(struct snd_pcm_substream *substream, int state); | |
1010 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
1011 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
1012 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1013 | }; | |
1014 | ||
1015 | /* | |
1016 | * this functions is core for handling of linked stream | |
1017 | * Note: the stream state might be changed also on failure | |
1018 | * Note2: call with calling stream lock + link lock | |
1019 | */ | |
1020 | static int snd_pcm_action_group(const struct action_ops *ops, | |
1021 | struct snd_pcm_substream *substream, | |
1022 | int state, int do_lock) | |
1023 | { | |
1024 | struct snd_pcm_substream *s = NULL; | |
1025 | struct snd_pcm_substream *s1; | |
1026 | int res = 0, depth = 1; | |
1027 | ||
1028 | snd_pcm_group_for_each_entry(s, substream) { | |
1029 | if (do_lock && s != substream) { | |
1030 | if (s->pcm->nonatomic) | |
1031 | mutex_lock_nested(&s->self_group.mutex, depth); | |
1032 | else | |
1033 | spin_lock_nested(&s->self_group.lock, depth); | |
1034 | depth++; | |
1035 | } | |
1036 | res = ops->pre_action(s, state); | |
1037 | if (res < 0) | |
1038 | goto _unlock; | |
1039 | } | |
1040 | snd_pcm_group_for_each_entry(s, substream) { | |
1041 | res = ops->do_action(s, state); | |
1042 | if (res < 0) { | |
1043 | if (ops->undo_action) { | |
1044 | snd_pcm_group_for_each_entry(s1, substream) { | |
1045 | if (s1 == s) /* failed stream */ | |
1046 | break; | |
1047 | ops->undo_action(s1, state); | |
1048 | } | |
1049 | } | |
1050 | s = NULL; /* unlock all */ | |
1051 | goto _unlock; | |
1052 | } | |
1053 | } | |
1054 | snd_pcm_group_for_each_entry(s, substream) { | |
1055 | ops->post_action(s, state); | |
1056 | } | |
1057 | _unlock: | |
1058 | if (do_lock) { | |
1059 | /* unlock streams */ | |
1060 | snd_pcm_group_for_each_entry(s1, substream) { | |
1061 | if (s1 != substream) { | |
1062 | if (s1->pcm->nonatomic) | |
1063 | mutex_unlock(&s1->self_group.mutex); | |
1064 | else | |
1065 | spin_unlock(&s1->self_group.lock); | |
1066 | } | |
1067 | if (s1 == s) /* end */ | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | return res; | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * Note: call with stream lock | |
1076 | */ | |
1077 | static int snd_pcm_action_single(const struct action_ops *ops, | |
1078 | struct snd_pcm_substream *substream, | |
1079 | int state) | |
1080 | { | |
1081 | int res; | |
1082 | ||
1083 | res = ops->pre_action(substream, state); | |
1084 | if (res < 0) | |
1085 | return res; | |
1086 | res = ops->do_action(substream, state); | |
1087 | if (res == 0) | |
1088 | ops->post_action(substream, state); | |
1089 | else if (ops->undo_action) | |
1090 | ops->undo_action(substream, state); | |
1091 | return res; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Note: call with stream lock | |
1096 | */ | |
1097 | static int snd_pcm_action(const struct action_ops *ops, | |
1098 | struct snd_pcm_substream *substream, | |
1099 | int state) | |
1100 | { | |
1101 | int res; | |
1102 | ||
1103 | if (!snd_pcm_stream_linked(substream)) | |
1104 | return snd_pcm_action_single(ops, substream, state); | |
1105 | ||
1106 | if (substream->pcm->nonatomic) { | |
1107 | if (!mutex_trylock(&substream->group->mutex)) { | |
1108 | mutex_unlock(&substream->self_group.mutex); | |
1109 | mutex_lock(&substream->group->mutex); | |
1110 | mutex_lock(&substream->self_group.mutex); | |
1111 | } | |
1112 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1113 | mutex_unlock(&substream->group->mutex); | |
1114 | } else { | |
1115 | if (!spin_trylock(&substream->group->lock)) { | |
1116 | spin_unlock(&substream->self_group.lock); | |
1117 | spin_lock(&substream->group->lock); | |
1118 | spin_lock(&substream->self_group.lock); | |
1119 | } | |
1120 | res = snd_pcm_action_group(ops, substream, state, 1); | |
1121 | spin_unlock(&substream->group->lock); | |
1122 | } | |
1123 | return res; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * Note: don't use any locks before | |
1128 | */ | |
1129 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, | |
1130 | struct snd_pcm_substream *substream, | |
1131 | int state) | |
1132 | { | |
1133 | int res; | |
1134 | ||
1135 | snd_pcm_stream_lock_irq(substream); | |
1136 | res = snd_pcm_action(ops, substream, state); | |
1137 | snd_pcm_stream_unlock_irq(substream); | |
1138 | return res; | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | */ | |
1143 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, | |
1144 | struct snd_pcm_substream *substream, | |
1145 | int state) | |
1146 | { | |
1147 | int res; | |
1148 | ||
1149 | down_read(&snd_pcm_link_rwsem); | |
1150 | if (snd_pcm_stream_linked(substream)) | |
1151 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1152 | else | |
1153 | res = snd_pcm_action_single(ops, substream, state); | |
1154 | up_read(&snd_pcm_link_rwsem); | |
1155 | return res; | |
1156 | } | |
1157 | ||
1158 | /* | |
1159 | * start callbacks | |
1160 | */ | |
1161 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) | |
1162 | { | |
1163 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1164 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) | |
1165 | return -EBADFD; | |
1166 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1167 | !snd_pcm_playback_data(substream)) | |
1168 | return -EPIPE; | |
1169 | runtime->trigger_tstamp_latched = false; | |
1170 | runtime->trigger_master = substream; | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) | |
1175 | { | |
1176 | if (substream->runtime->trigger_master != substream) | |
1177 | return 0; | |
1178 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1179 | } | |
1180 | ||
1181 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) | |
1182 | { | |
1183 | if (substream->runtime->trigger_master == substream) | |
1184 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1185 | } | |
1186 | ||
1187 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) | |
1188 | { | |
1189 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1190 | snd_pcm_trigger_tstamp(substream); | |
1191 | runtime->hw_ptr_jiffies = jiffies; | |
1192 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / | |
1193 | runtime->rate; | |
1194 | runtime->status->state = state; | |
1195 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1196 | runtime->silence_size > 0) | |
1197 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1198 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); | |
1199 | } | |
1200 | ||
1201 | static const struct action_ops snd_pcm_action_start = { | |
1202 | .pre_action = snd_pcm_pre_start, | |
1203 | .do_action = snd_pcm_do_start, | |
1204 | .undo_action = snd_pcm_undo_start, | |
1205 | .post_action = snd_pcm_post_start | |
1206 | }; | |
1207 | ||
1208 | /** | |
1209 | * snd_pcm_start - start all linked streams | |
1210 | * @substream: the PCM substream instance | |
1211 | * | |
1212 | * Return: Zero if successful, or a negative error code. | |
1213 | * The stream lock must be acquired before calling this function. | |
1214 | */ | |
1215 | int snd_pcm_start(struct snd_pcm_substream *substream) | |
1216 | { | |
1217 | return snd_pcm_action(&snd_pcm_action_start, substream, | |
1218 | SNDRV_PCM_STATE_RUNNING); | |
1219 | } | |
1220 | ||
1221 | /* take the stream lock and start the streams */ | |
1222 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) | |
1223 | { | |
1224 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, | |
1225 | SNDRV_PCM_STATE_RUNNING); | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * stop callbacks | |
1230 | */ | |
1231 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) | |
1232 | { | |
1233 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1234 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1235 | return -EBADFD; | |
1236 | runtime->trigger_master = substream; | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) | |
1241 | { | |
1242 | if (substream->runtime->trigger_master == substream && | |
1243 | snd_pcm_running(substream)) | |
1244 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1245 | return 0; /* unconditonally stop all substreams */ | |
1246 | } | |
1247 | ||
1248 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) | |
1249 | { | |
1250 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1251 | if (runtime->status->state != state) { | |
1252 | snd_pcm_trigger_tstamp(substream); | |
1253 | runtime->status->state = state; | |
1254 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); | |
1255 | } | |
1256 | wake_up(&runtime->sleep); | |
1257 | wake_up(&runtime->tsleep); | |
1258 | } | |
1259 | ||
1260 | static const struct action_ops snd_pcm_action_stop = { | |
1261 | .pre_action = snd_pcm_pre_stop, | |
1262 | .do_action = snd_pcm_do_stop, | |
1263 | .post_action = snd_pcm_post_stop | |
1264 | }; | |
1265 | ||
1266 | /** | |
1267 | * snd_pcm_stop - try to stop all running streams in the substream group | |
1268 | * @substream: the PCM substream instance | |
1269 | * @state: PCM state after stopping the stream | |
1270 | * | |
1271 | * The state of each stream is then changed to the given state unconditionally. | |
1272 | * | |
1273 | * Return: Zero if successful, or a negative error code. | |
1274 | */ | |
1275 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) | |
1276 | { | |
1277 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1278 | } | |
1279 | EXPORT_SYMBOL(snd_pcm_stop); | |
1280 | ||
1281 | /** | |
1282 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback | |
1283 | * @substream: the PCM substream | |
1284 | * | |
1285 | * After stopping, the state is changed to SETUP. | |
1286 | * Unlike snd_pcm_stop(), this affects only the given stream. | |
1287 | * | |
1288 | * Return: Zero if succesful, or a negative error code. | |
1289 | */ | |
1290 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) | |
1291 | { | |
1292 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, | |
1293 | SNDRV_PCM_STATE_SETUP); | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1298 | * @substream: the PCM substream instance | |
1299 | * | |
1300 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1301 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1302 | * | |
1303 | * Return: Zero if successful, or a negative error code. | |
1304 | */ | |
1305 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1306 | { | |
1307 | unsigned long flags; | |
1308 | int ret = 0; | |
1309 | ||
1310 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1311 | if (snd_pcm_running(substream)) | |
1312 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1313 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1314 | return ret; | |
1315 | } | |
1316 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1317 | ||
1318 | /* | |
1319 | * pause callbacks | |
1320 | */ | |
1321 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) | |
1322 | { | |
1323 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1324 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) | |
1325 | return -ENOSYS; | |
1326 | if (push) { | |
1327 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1328 | return -EBADFD; | |
1329 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1330 | return -EBADFD; | |
1331 | runtime->trigger_master = substream; | |
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) | |
1336 | { | |
1337 | if (substream->runtime->trigger_master != substream) | |
1338 | return 0; | |
1339 | /* some drivers might use hw_ptr to recover from the pause - | |
1340 | update the hw_ptr now */ | |
1341 | if (push) | |
1342 | snd_pcm_update_hw_ptr(substream); | |
1343 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by | |
1344 | * a delta between the current jiffies, this gives a large enough | |
1345 | * delta, effectively to skip the check once. | |
1346 | */ | |
1347 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1348 | return substream->ops->trigger(substream, | |
1349 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1350 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1351 | } | |
1352 | ||
1353 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) | |
1354 | { | |
1355 | if (substream->runtime->trigger_master == substream) | |
1356 | substream->ops->trigger(substream, | |
1357 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1358 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1359 | } | |
1360 | ||
1361 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) | |
1362 | { | |
1363 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1364 | snd_pcm_trigger_tstamp(substream); | |
1365 | if (push) { | |
1366 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
1367 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); | |
1368 | wake_up(&runtime->sleep); | |
1369 | wake_up(&runtime->tsleep); | |
1370 | } else { | |
1371 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
1372 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | static const struct action_ops snd_pcm_action_pause = { | |
1377 | .pre_action = snd_pcm_pre_pause, | |
1378 | .do_action = snd_pcm_do_pause, | |
1379 | .undo_action = snd_pcm_undo_pause, | |
1380 | .post_action = snd_pcm_post_pause | |
1381 | }; | |
1382 | ||
1383 | /* | |
1384 | * Push/release the pause for all linked streams. | |
1385 | */ | |
1386 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) | |
1387 | { | |
1388 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1389 | } | |
1390 | ||
1391 | #ifdef CONFIG_PM | |
1392 | /* suspend */ | |
1393 | ||
1394 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) | |
1395 | { | |
1396 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1397 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1398 | return -EBUSY; | |
1399 | runtime->trigger_master = substream; | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) | |
1404 | { | |
1405 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1406 | if (runtime->trigger_master != substream) | |
1407 | return 0; | |
1408 | if (! snd_pcm_running(substream)) | |
1409 | return 0; | |
1410 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1411 | return 0; /* suspend unconditionally */ | |
1412 | } | |
1413 | ||
1414 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) | |
1415 | { | |
1416 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1417 | snd_pcm_trigger_tstamp(substream); | |
1418 | runtime->status->suspended_state = runtime->status->state; | |
1419 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
1420 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); | |
1421 | wake_up(&runtime->sleep); | |
1422 | wake_up(&runtime->tsleep); | |
1423 | } | |
1424 | ||
1425 | static const struct action_ops snd_pcm_action_suspend = { | |
1426 | .pre_action = snd_pcm_pre_suspend, | |
1427 | .do_action = snd_pcm_do_suspend, | |
1428 | .post_action = snd_pcm_post_suspend | |
1429 | }; | |
1430 | ||
1431 | /** | |
1432 | * snd_pcm_suspend - trigger SUSPEND to all linked streams | |
1433 | * @substream: the PCM substream | |
1434 | * | |
1435 | * After this call, all streams are changed to SUSPENDED state. | |
1436 | * | |
1437 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1438 | * code. | |
1439 | */ | |
1440 | int snd_pcm_suspend(struct snd_pcm_substream *substream) | |
1441 | { | |
1442 | int err; | |
1443 | unsigned long flags; | |
1444 | ||
1445 | if (! substream) | |
1446 | return 0; | |
1447 | ||
1448 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1449 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1450 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1451 | return err; | |
1452 | } | |
1453 | EXPORT_SYMBOL(snd_pcm_suspend); | |
1454 | ||
1455 | /** | |
1456 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm | |
1457 | * @pcm: the PCM instance | |
1458 | * | |
1459 | * After this call, all streams are changed to SUSPENDED state. | |
1460 | * | |
1461 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1462 | */ | |
1463 | int snd_pcm_suspend_all(struct snd_pcm *pcm) | |
1464 | { | |
1465 | struct snd_pcm_substream *substream; | |
1466 | int stream, err = 0; | |
1467 | ||
1468 | if (! pcm) | |
1469 | return 0; | |
1470 | ||
1471 | for (stream = 0; stream < 2; stream++) { | |
1472 | for (substream = pcm->streams[stream].substream; | |
1473 | substream; substream = substream->next) { | |
1474 | /* FIXME: the open/close code should lock this as well */ | |
1475 | if (substream->runtime == NULL) | |
1476 | continue; | |
1477 | err = snd_pcm_suspend(substream); | |
1478 | if (err < 0 && err != -EBUSY) | |
1479 | return err; | |
1480 | } | |
1481 | } | |
1482 | return 0; | |
1483 | } | |
1484 | EXPORT_SYMBOL(snd_pcm_suspend_all); | |
1485 | ||
1486 | /* resume */ | |
1487 | ||
1488 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) | |
1489 | { | |
1490 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1491 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) | |
1492 | return -ENOSYS; | |
1493 | runtime->trigger_master = substream; | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) | |
1498 | { | |
1499 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1500 | if (runtime->trigger_master != substream) | |
1501 | return 0; | |
1502 | /* DMA not running previously? */ | |
1503 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1504 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1505 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1506 | return 0; | |
1507 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1508 | } | |
1509 | ||
1510 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) | |
1511 | { | |
1512 | if (substream->runtime->trigger_master == substream && | |
1513 | snd_pcm_running(substream)) | |
1514 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1515 | } | |
1516 | ||
1517 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) | |
1518 | { | |
1519 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1520 | snd_pcm_trigger_tstamp(substream); | |
1521 | runtime->status->state = runtime->status->suspended_state; | |
1522 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); | |
1523 | } | |
1524 | ||
1525 | static const struct action_ops snd_pcm_action_resume = { | |
1526 | .pre_action = snd_pcm_pre_resume, | |
1527 | .do_action = snd_pcm_do_resume, | |
1528 | .undo_action = snd_pcm_undo_resume, | |
1529 | .post_action = snd_pcm_post_resume | |
1530 | }; | |
1531 | ||
1532 | static int snd_pcm_resume(struct snd_pcm_substream *substream) | |
1533 | { | |
1534 | return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); | |
1535 | } | |
1536 | ||
1537 | #else | |
1538 | ||
1539 | static int snd_pcm_resume(struct snd_pcm_substream *substream) | |
1540 | { | |
1541 | return -ENOSYS; | |
1542 | } | |
1543 | ||
1544 | #endif /* CONFIG_PM */ | |
1545 | ||
1546 | /* | |
1547 | * xrun ioctl | |
1548 | * | |
1549 | * Change the RUNNING stream(s) to XRUN state. | |
1550 | */ | |
1551 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) | |
1552 | { | |
1553 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1554 | int result; | |
1555 | ||
1556 | snd_pcm_stream_lock_irq(substream); | |
1557 | switch (runtime->status->state) { | |
1558 | case SNDRV_PCM_STATE_XRUN: | |
1559 | result = 0; /* already there */ | |
1560 | break; | |
1561 | case SNDRV_PCM_STATE_RUNNING: | |
1562 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1563 | break; | |
1564 | default: | |
1565 | result = -EBADFD; | |
1566 | } | |
1567 | snd_pcm_stream_unlock_irq(substream); | |
1568 | return result; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * reset ioctl | |
1573 | */ | |
1574 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) | |
1575 | { | |
1576 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1577 | switch (runtime->status->state) { | |
1578 | case SNDRV_PCM_STATE_RUNNING: | |
1579 | case SNDRV_PCM_STATE_PREPARED: | |
1580 | case SNDRV_PCM_STATE_PAUSED: | |
1581 | case SNDRV_PCM_STATE_SUSPENDED: | |
1582 | return 0; | |
1583 | default: | |
1584 | return -EBADFD; | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) | |
1589 | { | |
1590 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1591 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); | |
1592 | if (err < 0) | |
1593 | return err; | |
1594 | runtime->hw_ptr_base = 0; | |
1595 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - | |
1596 | runtime->status->hw_ptr % runtime->period_size; | |
1597 | runtime->silence_start = runtime->status->hw_ptr; | |
1598 | runtime->silence_filled = 0; | |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) | |
1603 | { | |
1604 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1605 | runtime->control->appl_ptr = runtime->status->hw_ptr; | |
1606 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1607 | runtime->silence_size > 0) | |
1608 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1609 | } | |
1610 | ||
1611 | static const struct action_ops snd_pcm_action_reset = { | |
1612 | .pre_action = snd_pcm_pre_reset, | |
1613 | .do_action = snd_pcm_do_reset, | |
1614 | .post_action = snd_pcm_post_reset | |
1615 | }; | |
1616 | ||
1617 | static int snd_pcm_reset(struct snd_pcm_substream *substream) | |
1618 | { | |
1619 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1620 | } | |
1621 | ||
1622 | /* | |
1623 | * prepare ioctl | |
1624 | */ | |
1625 | /* we use the second argument for updating f_flags */ | |
1626 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1627 | int f_flags) | |
1628 | { | |
1629 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1630 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1631 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1632 | return -EBADFD; | |
1633 | if (snd_pcm_running(substream)) | |
1634 | return -EBUSY; | |
1635 | substream->f_flags = f_flags; | |
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) | |
1640 | { | |
1641 | int err; | |
1642 | err = substream->ops->prepare(substream); | |
1643 | if (err < 0) | |
1644 | return err; | |
1645 | return snd_pcm_do_reset(substream, 0); | |
1646 | } | |
1647 | ||
1648 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) | |
1649 | { | |
1650 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1651 | runtime->control->appl_ptr = runtime->status->hw_ptr; | |
1652 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); | |
1653 | } | |
1654 | ||
1655 | static const struct action_ops snd_pcm_action_prepare = { | |
1656 | .pre_action = snd_pcm_pre_prepare, | |
1657 | .do_action = snd_pcm_do_prepare, | |
1658 | .post_action = snd_pcm_post_prepare | |
1659 | }; | |
1660 | ||
1661 | /** | |
1662 | * snd_pcm_prepare - prepare the PCM substream to be triggerable | |
1663 | * @substream: the PCM substream instance | |
1664 | * @file: file to refer f_flags | |
1665 | * | |
1666 | * Return: Zero if successful, or a negative error code. | |
1667 | */ | |
1668 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, | |
1669 | struct file *file) | |
1670 | { | |
1671 | int f_flags; | |
1672 | ||
1673 | if (file) | |
1674 | f_flags = file->f_flags; | |
1675 | else | |
1676 | f_flags = substream->f_flags; | |
1677 | ||
1678 | snd_pcm_stream_lock_irq(substream); | |
1679 | switch (substream->runtime->status->state) { | |
1680 | case SNDRV_PCM_STATE_PAUSED: | |
1681 | snd_pcm_pause(substream, 0); | |
1682 | /* fallthru */ | |
1683 | case SNDRV_PCM_STATE_SUSPENDED: | |
1684 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1685 | break; | |
1686 | } | |
1687 | snd_pcm_stream_unlock_irq(substream); | |
1688 | ||
1689 | return snd_pcm_action_nonatomic(&snd_pcm_action_prepare, | |
1690 | substream, f_flags); | |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | * drain ioctl | |
1695 | */ | |
1696 | ||
1697 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) | |
1698 | { | |
1699 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1700 | switch (runtime->status->state) { | |
1701 | case SNDRV_PCM_STATE_OPEN: | |
1702 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1703 | case SNDRV_PCM_STATE_SUSPENDED: | |
1704 | return -EBADFD; | |
1705 | } | |
1706 | runtime->trigger_master = substream; | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) | |
1711 | { | |
1712 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1713 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
1714 | switch (runtime->status->state) { | |
1715 | case SNDRV_PCM_STATE_PREPARED: | |
1716 | /* start playback stream if possible */ | |
1717 | if (! snd_pcm_playback_empty(substream)) { | |
1718 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1719 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1720 | } else { | |
1721 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1722 | } | |
1723 | break; | |
1724 | case SNDRV_PCM_STATE_RUNNING: | |
1725 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1726 | break; | |
1727 | case SNDRV_PCM_STATE_XRUN: | |
1728 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1729 | break; | |
1730 | default: | |
1731 | break; | |
1732 | } | |
1733 | } else { | |
1734 | /* stop running stream */ | |
1735 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
1736 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? | |
1737 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; | |
1738 | snd_pcm_do_stop(substream, new_state); | |
1739 | snd_pcm_post_stop(substream, new_state); | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1744 | runtime->trigger_master == substream && | |
1745 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1746 | return substream->ops->trigger(substream, | |
1747 | SNDRV_PCM_TRIGGER_DRAIN); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) | |
1753 | { | |
1754 | } | |
1755 | ||
1756 | static const struct action_ops snd_pcm_action_drain_init = { | |
1757 | .pre_action = snd_pcm_pre_drain_init, | |
1758 | .do_action = snd_pcm_do_drain_init, | |
1759 | .post_action = snd_pcm_post_drain_init | |
1760 | }; | |
1761 | ||
1762 | static int snd_pcm_drop(struct snd_pcm_substream *substream); | |
1763 | ||
1764 | /* | |
1765 | * Drain the stream(s). | |
1766 | * When the substream is linked, sync until the draining of all playback streams | |
1767 | * is finished. | |
1768 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1769 | * (capture only) state. | |
1770 | */ | |
1771 | static int snd_pcm_drain(struct snd_pcm_substream *substream, | |
1772 | struct file *file) | |
1773 | { | |
1774 | struct snd_card *card; | |
1775 | struct snd_pcm_runtime *runtime; | |
1776 | struct snd_pcm_substream *s; | |
1777 | wait_queue_entry_t wait; | |
1778 | int result = 0; | |
1779 | int nonblock = 0; | |
1780 | ||
1781 | card = substream->pcm->card; | |
1782 | runtime = substream->runtime; | |
1783 | ||
1784 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1785 | return -EBADFD; | |
1786 | ||
1787 | if (file) { | |
1788 | if (file->f_flags & O_NONBLOCK) | |
1789 | nonblock = 1; | |
1790 | } else if (substream->f_flags & O_NONBLOCK) | |
1791 | nonblock = 1; | |
1792 | ||
1793 | down_read(&snd_pcm_link_rwsem); | |
1794 | snd_pcm_stream_lock_irq(substream); | |
1795 | /* resume pause */ | |
1796 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1797 | snd_pcm_pause(substream, 0); | |
1798 | ||
1799 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1800 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
1801 | if (result < 0) | |
1802 | goto unlock; | |
1803 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1804 | if (nonblock) { | |
1805 | result = -EAGAIN; | |
1806 | goto unlock; | |
1807 | } | |
1808 | ||
1809 | for (;;) { | |
1810 | long tout; | |
1811 | struct snd_pcm_runtime *to_check; | |
1812 | if (signal_pending(current)) { | |
1813 | result = -ERESTARTSYS; | |
1814 | break; | |
1815 | } | |
1816 | /* find a substream to drain */ | |
1817 | to_check = NULL; | |
1818 | snd_pcm_group_for_each_entry(s, substream) { | |
1819 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1820 | continue; | |
1821 | runtime = s->runtime; | |
1822 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1823 | to_check = runtime; | |
1824 | break; | |
1825 | } | |
1826 | } | |
1827 | if (!to_check) | |
1828 | break; /* all drained */ | |
1829 | init_waitqueue_entry(&wait, current); | |
1830 | add_wait_queue(&to_check->sleep, &wait); | |
1831 | snd_pcm_stream_unlock_irq(substream); | |
1832 | up_read(&snd_pcm_link_rwsem); | |
1833 | snd_power_unlock(card); | |
1834 | if (runtime->no_period_wakeup) | |
1835 | tout = MAX_SCHEDULE_TIMEOUT; | |
1836 | else { | |
1837 | tout = 10; | |
1838 | if (runtime->rate) { | |
1839 | long t = runtime->period_size * 2 / runtime->rate; | |
1840 | tout = max(t, tout); | |
1841 | } | |
1842 | tout = msecs_to_jiffies(tout * 1000); | |
1843 | } | |
1844 | tout = schedule_timeout_interruptible(tout); | |
1845 | snd_power_lock(card); | |
1846 | down_read(&snd_pcm_link_rwsem); | |
1847 | snd_pcm_stream_lock_irq(substream); | |
1848 | remove_wait_queue(&to_check->sleep, &wait); | |
1849 | if (card->shutdown) { | |
1850 | result = -ENODEV; | |
1851 | break; | |
1852 | } | |
1853 | if (tout == 0) { | |
1854 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1855 | result = -ESTRPIPE; | |
1856 | else { | |
1857 | dev_dbg(substream->pcm->card->dev, | |
1858 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1859 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1860 | result = -EIO; | |
1861 | } | |
1862 | break; | |
1863 | } | |
1864 | } | |
1865 | ||
1866 | unlock: | |
1867 | snd_pcm_stream_unlock_irq(substream); | |
1868 | up_read(&snd_pcm_link_rwsem); | |
1869 | ||
1870 | return result; | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * drop ioctl | |
1875 | * | |
1876 | * Immediately put all linked substreams into SETUP state. | |
1877 | */ | |
1878 | static int snd_pcm_drop(struct snd_pcm_substream *substream) | |
1879 | { | |
1880 | struct snd_pcm_runtime *runtime; | |
1881 | int result = 0; | |
1882 | ||
1883 | if (PCM_RUNTIME_CHECK(substream)) | |
1884 | return -ENXIO; | |
1885 | runtime = substream->runtime; | |
1886 | ||
1887 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1888 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1889 | return -EBADFD; | |
1890 | ||
1891 | snd_pcm_stream_lock_irq(substream); | |
1892 | /* resume pause */ | |
1893 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1894 | snd_pcm_pause(substream, 0); | |
1895 | ||
1896 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1897 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1898 | snd_pcm_stream_unlock_irq(substream); | |
1899 | ||
1900 | return result; | |
1901 | } | |
1902 | ||
1903 | ||
1904 | static bool is_pcm_file(struct file *file) | |
1905 | { | |
1906 | struct inode *inode = file_inode(file); | |
1907 | unsigned int minor; | |
1908 | ||
1909 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) | |
1910 | return false; | |
1911 | minor = iminor(inode); | |
1912 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || | |
1913 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1914 | } | |
1915 | ||
1916 | /* | |
1917 | * PCM link handling | |
1918 | */ | |
1919 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) | |
1920 | { | |
1921 | int res = 0; | |
1922 | struct snd_pcm_file *pcm_file; | |
1923 | struct snd_pcm_substream *substream1; | |
1924 | struct snd_pcm_group *group; | |
1925 | struct fd f = fdget(fd); | |
1926 | ||
1927 | if (!f.file) | |
1928 | return -EBADFD; | |
1929 | if (!is_pcm_file(f.file)) { | |
1930 | res = -EBADFD; | |
1931 | goto _badf; | |
1932 | } | |
1933 | pcm_file = f.file->private_data; | |
1934 | substream1 = pcm_file->substream; | |
1935 | group = kmalloc(sizeof(*group), GFP_KERNEL); | |
1936 | if (!group) { | |
1937 | res = -ENOMEM; | |
1938 | goto _nolock; | |
1939 | } | |
1940 | down_write_nonblock(&snd_pcm_link_rwsem); | |
1941 | write_lock_irq(&snd_pcm_link_rwlock); | |
1942 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
1943 | substream->runtime->status->state != substream1->runtime->status->state || | |
1944 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1945 | res = -EBADFD; | |
1946 | goto _end; | |
1947 | } | |
1948 | if (snd_pcm_stream_linked(substream1)) { | |
1949 | res = -EALREADY; | |
1950 | goto _end; | |
1951 | } | |
1952 | if (!snd_pcm_stream_linked(substream)) { | |
1953 | substream->group = group; | |
1954 | group = NULL; | |
1955 | spin_lock_init(&substream->group->lock); | |
1956 | mutex_init(&substream->group->mutex); | |
1957 | INIT_LIST_HEAD(&substream->group->substreams); | |
1958 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1959 | substream->group->count = 1; | |
1960 | } | |
1961 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1962 | substream->group->count++; | |
1963 | substream1->group = substream->group; | |
1964 | _end: | |
1965 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1966 | up_write(&snd_pcm_link_rwsem); | |
1967 | _nolock: | |
1968 | snd_card_unref(substream1->pcm->card); | |
1969 | kfree(group); | |
1970 | _badf: | |
1971 | fdput(f); | |
1972 | return res; | |
1973 | } | |
1974 | ||
1975 | static void relink_to_local(struct snd_pcm_substream *substream) | |
1976 | { | |
1977 | substream->group = &substream->self_group; | |
1978 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1979 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1980 | } | |
1981 | ||
1982 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) | |
1983 | { | |
1984 | struct snd_pcm_substream *s; | |
1985 | int res = 0; | |
1986 | ||
1987 | down_write_nonblock(&snd_pcm_link_rwsem); | |
1988 | write_lock_irq(&snd_pcm_link_rwlock); | |
1989 | if (!snd_pcm_stream_linked(substream)) { | |
1990 | res = -EALREADY; | |
1991 | goto _end; | |
1992 | } | |
1993 | list_del(&substream->link_list); | |
1994 | substream->group->count--; | |
1995 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
1996 | snd_pcm_group_for_each_entry(s, substream) { | |
1997 | relink_to_local(s); | |
1998 | break; | |
1999 | } | |
2000 | kfree(substream->group); | |
2001 | } | |
2002 | relink_to_local(substream); | |
2003 | _end: | |
2004 | write_unlock_irq(&snd_pcm_link_rwlock); | |
2005 | up_write(&snd_pcm_link_rwsem); | |
2006 | return res; | |
2007 | } | |
2008 | ||
2009 | /* | |
2010 | * hw configurator | |
2011 | */ | |
2012 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, | |
2013 | struct snd_pcm_hw_rule *rule) | |
2014 | { | |
2015 | struct snd_interval t; | |
2016 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), | |
2017 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2018 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2019 | } | |
2020 | ||
2021 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, | |
2022 | struct snd_pcm_hw_rule *rule) | |
2023 | { | |
2024 | struct snd_interval t; | |
2025 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), | |
2026 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2027 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2028 | } | |
2029 | ||
2030 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, | |
2031 | struct snd_pcm_hw_rule *rule) | |
2032 | { | |
2033 | struct snd_interval t; | |
2034 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), | |
2035 | hw_param_interval_c(params, rule->deps[1]), | |
2036 | (unsigned long) rule->private, &t); | |
2037 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2038 | } | |
2039 | ||
2040 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, | |
2041 | struct snd_pcm_hw_rule *rule) | |
2042 | { | |
2043 | struct snd_interval t; | |
2044 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), | |
2045 | (unsigned long) rule->private, | |
2046 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2047 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2048 | } | |
2049 | ||
2050 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, | |
2051 | struct snd_pcm_hw_rule *rule) | |
2052 | { | |
2053 | unsigned int k; | |
2054 | const struct snd_interval *i = | |
2055 | hw_param_interval_c(params, rule->deps[0]); | |
2056 | struct snd_mask m; | |
2057 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
2058 | snd_mask_any(&m); | |
2059 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2060 | int bits; | |
2061 | if (! snd_mask_test(mask, k)) | |
2062 | continue; | |
2063 | bits = snd_pcm_format_physical_width(k); | |
2064 | if (bits <= 0) | |
2065 | continue; /* ignore invalid formats */ | |
2066 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
2067 | snd_mask_reset(&m, k); | |
2068 | } | |
2069 | return snd_mask_refine(mask, &m); | |
2070 | } | |
2071 | ||
2072 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, | |
2073 | struct snd_pcm_hw_rule *rule) | |
2074 | { | |
2075 | struct snd_interval t; | |
2076 | unsigned int k; | |
2077 | t.min = UINT_MAX; | |
2078 | t.max = 0; | |
2079 | t.openmin = 0; | |
2080 | t.openmax = 0; | |
2081 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2082 | int bits; | |
2083 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
2084 | continue; | |
2085 | bits = snd_pcm_format_physical_width(k); | |
2086 | if (bits <= 0) | |
2087 | continue; /* ignore invalid formats */ | |
2088 | if (t.min > (unsigned)bits) | |
2089 | t.min = bits; | |
2090 | if (t.max < (unsigned)bits) | |
2091 | t.max = bits; | |
2092 | } | |
2093 | t.integer = 1; | |
2094 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2095 | } | |
2096 | ||
2097 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
2098 | #error "Change this table" | |
2099 | #endif | |
2100 | ||
2101 | static const unsigned int rates[] = { | |
2102 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
2103 | 48000, 64000, 88200, 96000, 176400, 192000 | |
2104 | }; | |
2105 | ||
2106 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { | |
2107 | .count = ARRAY_SIZE(rates), | |
2108 | .list = rates, | |
2109 | }; | |
2110 | ||
2111 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, | |
2112 | struct snd_pcm_hw_rule *rule) | |
2113 | { | |
2114 | struct snd_pcm_hardware *hw = rule->private; | |
2115 | return snd_interval_list(hw_param_interval(params, rule->var), | |
2116 | snd_pcm_known_rates.count, | |
2117 | snd_pcm_known_rates.list, hw->rates); | |
2118 | } | |
2119 | ||
2120 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, | |
2121 | struct snd_pcm_hw_rule *rule) | |
2122 | { | |
2123 | struct snd_interval t; | |
2124 | struct snd_pcm_substream *substream = rule->private; | |
2125 | t.min = 0; | |
2126 | t.max = substream->buffer_bytes_max; | |
2127 | t.openmin = 0; | |
2128 | t.openmax = 0; | |
2129 | t.integer = 1; | |
2130 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2131 | } | |
2132 | ||
2133 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) | |
2134 | { | |
2135 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2136 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
2137 | int k, err; | |
2138 | ||
2139 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2140 | snd_mask_any(constrs_mask(constrs, k)); | |
2141 | } | |
2142 | ||
2143 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2144 | snd_interval_any(constrs_interval(constrs, k)); | |
2145 | } | |
2146 | ||
2147 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2148 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2149 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2150 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2151 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2152 | ||
2153 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2154 | snd_pcm_hw_rule_format, NULL, | |
2155 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2156 | if (err < 0) | |
2157 | return err; | |
2158 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2159 | snd_pcm_hw_rule_sample_bits, NULL, | |
2160 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2161 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2162 | if (err < 0) | |
2163 | return err; | |
2164 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2165 | snd_pcm_hw_rule_div, NULL, | |
2166 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2167 | if (err < 0) | |
2168 | return err; | |
2169 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2170 | snd_pcm_hw_rule_mul, NULL, | |
2171 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2172 | if (err < 0) | |
2173 | return err; | |
2174 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2175 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2176 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2177 | if (err < 0) | |
2178 | return err; | |
2179 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2180 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2181 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2182 | if (err < 0) | |
2183 | return err; | |
2184 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2185 | snd_pcm_hw_rule_div, NULL, | |
2186 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2187 | if (err < 0) | |
2188 | return err; | |
2189 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2190 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2191 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2192 | if (err < 0) | |
2193 | return err; | |
2194 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2195 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2196 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2197 | if (err < 0) | |
2198 | return err; | |
2199 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2200 | snd_pcm_hw_rule_div, NULL, | |
2201 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2202 | if (err < 0) | |
2203 | return err; | |
2204 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2205 | snd_pcm_hw_rule_div, NULL, | |
2206 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2207 | if (err < 0) | |
2208 | return err; | |
2209 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2210 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2211 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2212 | if (err < 0) | |
2213 | return err; | |
2214 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2215 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2216 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2217 | if (err < 0) | |
2218 | return err; | |
2219 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2220 | snd_pcm_hw_rule_mul, NULL, | |
2221 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2222 | if (err < 0) | |
2223 | return err; | |
2224 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2225 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2226 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2227 | if (err < 0) | |
2228 | return err; | |
2229 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2230 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2231 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2232 | if (err < 0) | |
2233 | return err; | |
2234 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2235 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2236 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2237 | if (err < 0) | |
2238 | return err; | |
2239 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2240 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2241 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2242 | if (err < 0) | |
2243 | return err; | |
2244 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2245 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2246 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2247 | if (err < 0) | |
2248 | return err; | |
2249 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2250 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2251 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2252 | if (err < 0) | |
2253 | return err; | |
2254 | return 0; | |
2255 | } | |
2256 | ||
2257 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) | |
2258 | { | |
2259 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2260 | struct snd_pcm_hardware *hw = &runtime->hw; | |
2261 | int err; | |
2262 | unsigned int mask = 0; | |
2263 | ||
2264 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2265 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2266 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2267 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
2268 | if (hw_support_mmap(substream)) { | |
2269 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2270 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2271 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2272 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2273 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2274 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2275 | } | |
2276 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
2277 | if (err < 0) | |
2278 | return err; | |
2279 | ||
2280 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
2281 | if (err < 0) | |
2282 | return err; | |
2283 | ||
2284 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
2285 | if (err < 0) | |
2286 | return err; | |
2287 | ||
2288 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2289 | hw->channels_min, hw->channels_max); | |
2290 | if (err < 0) | |
2291 | return err; | |
2292 | ||
2293 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2294 | hw->rate_min, hw->rate_max); | |
2295 | if (err < 0) | |
2296 | return err; | |
2297 | ||
2298 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2299 | hw->period_bytes_min, hw->period_bytes_max); | |
2300 | if (err < 0) | |
2301 | return err; | |
2302 | ||
2303 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2304 | hw->periods_min, hw->periods_max); | |
2305 | if (err < 0) | |
2306 | return err; | |
2307 | ||
2308 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2309 | hw->period_bytes_min, hw->buffer_bytes_max); | |
2310 | if (err < 0) | |
2311 | return err; | |
2312 | ||
2313 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2314 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2315 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2316 | if (err < 0) | |
2317 | return err; | |
2318 | ||
2319 | /* FIXME: remove */ | |
2320 | if (runtime->dma_bytes) { | |
2321 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
2322 | if (err < 0) | |
2323 | return err; | |
2324 | } | |
2325 | ||
2326 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2327 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2328 | snd_pcm_hw_rule_rate, hw, | |
2329 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2330 | if (err < 0) | |
2331 | return err; | |
2332 | } | |
2333 | ||
2334 | /* FIXME: this belong to lowlevel */ | |
2335 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); | |
2336 | ||
2337 | return 0; | |
2338 | } | |
2339 | ||
2340 | static void pcm_release_private(struct snd_pcm_substream *substream) | |
2341 | { | |
2342 | snd_pcm_unlink(substream); | |
2343 | } | |
2344 | ||
2345 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2346 | { | |
2347 | substream->ref_count--; | |
2348 | if (substream->ref_count > 0) | |
2349 | return; | |
2350 | ||
2351 | snd_pcm_drop(substream); | |
2352 | if (substream->hw_opened) { | |
2353 | if (substream->ops->hw_free && | |
2354 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
2355 | substream->ops->hw_free(substream); | |
2356 | substream->ops->close(substream); | |
2357 | substream->hw_opened = 0; | |
2358 | } | |
2359 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) | |
2360 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
2361 | if (substream->pcm_release) { | |
2362 | substream->pcm_release(substream); | |
2363 | substream->pcm_release = NULL; | |
2364 | } | |
2365 | snd_pcm_detach_substream(substream); | |
2366 | } | |
2367 | EXPORT_SYMBOL(snd_pcm_release_substream); | |
2368 | ||
2369 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, | |
2370 | struct file *file, | |
2371 | struct snd_pcm_substream **rsubstream) | |
2372 | { | |
2373 | struct snd_pcm_substream *substream; | |
2374 | int err; | |
2375 | ||
2376 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2377 | if (err < 0) | |
2378 | return err; | |
2379 | if (substream->ref_count > 1) { | |
2380 | *rsubstream = substream; | |
2381 | return 0; | |
2382 | } | |
2383 | ||
2384 | err = snd_pcm_hw_constraints_init(substream); | |
2385 | if (err < 0) { | |
2386 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); | |
2387 | goto error; | |
2388 | } | |
2389 | ||
2390 | if ((err = substream->ops->open(substream)) < 0) | |
2391 | goto error; | |
2392 | ||
2393 | substream->hw_opened = 1; | |
2394 | ||
2395 | err = snd_pcm_hw_constraints_complete(substream); | |
2396 | if (err < 0) { | |
2397 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); | |
2398 | goto error; | |
2399 | } | |
2400 | ||
2401 | *rsubstream = substream; | |
2402 | return 0; | |
2403 | ||
2404 | error: | |
2405 | snd_pcm_release_substream(substream); | |
2406 | return err; | |
2407 | } | |
2408 | EXPORT_SYMBOL(snd_pcm_open_substream); | |
2409 | ||
2410 | static int snd_pcm_open_file(struct file *file, | |
2411 | struct snd_pcm *pcm, | |
2412 | int stream) | |
2413 | { | |
2414 | struct snd_pcm_file *pcm_file; | |
2415 | struct snd_pcm_substream *substream; | |
2416 | int err; | |
2417 | ||
2418 | err = snd_pcm_open_substream(pcm, stream, file, &substream); | |
2419 | if (err < 0) | |
2420 | return err; | |
2421 | ||
2422 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); | |
2423 | if (pcm_file == NULL) { | |
2424 | snd_pcm_release_substream(substream); | |
2425 | return -ENOMEM; | |
2426 | } | |
2427 | pcm_file->substream = substream; | |
2428 | if (substream->ref_count == 1) { | |
2429 | substream->file = pcm_file; | |
2430 | substream->pcm_release = pcm_release_private; | |
2431 | } | |
2432 | file->private_data = pcm_file; | |
2433 | ||
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) | |
2438 | { | |
2439 | struct snd_pcm *pcm; | |
2440 | int err = nonseekable_open(inode, file); | |
2441 | if (err < 0) | |
2442 | return err; | |
2443 | pcm = snd_lookup_minor_data(iminor(inode), | |
2444 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
2445 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); | |
2446 | if (pcm) | |
2447 | snd_card_unref(pcm->card); | |
2448 | return err; | |
2449 | } | |
2450 | ||
2451 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
2452 | { | |
2453 | struct snd_pcm *pcm; | |
2454 | int err = nonseekable_open(inode, file); | |
2455 | if (err < 0) | |
2456 | return err; | |
2457 | pcm = snd_lookup_minor_data(iminor(inode), | |
2458 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
2459 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); | |
2460 | if (pcm) | |
2461 | snd_card_unref(pcm->card); | |
2462 | return err; | |
2463 | } | |
2464 | ||
2465 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2466 | { | |
2467 | int err; | |
2468 | wait_queue_entry_t wait; | |
2469 | ||
2470 | if (pcm == NULL) { | |
2471 | err = -ENODEV; | |
2472 | goto __error1; | |
2473 | } | |
2474 | err = snd_card_file_add(pcm->card, file); | |
2475 | if (err < 0) | |
2476 | goto __error1; | |
2477 | if (!try_module_get(pcm->card->module)) { | |
2478 | err = -EFAULT; | |
2479 | goto __error2; | |
2480 | } | |
2481 | init_waitqueue_entry(&wait, current); | |
2482 | add_wait_queue(&pcm->open_wait, &wait); | |
2483 | mutex_lock(&pcm->open_mutex); | |
2484 | while (1) { | |
2485 | err = snd_pcm_open_file(file, pcm, stream); | |
2486 | if (err >= 0) | |
2487 | break; | |
2488 | if (err == -EAGAIN) { | |
2489 | if (file->f_flags & O_NONBLOCK) { | |
2490 | err = -EBUSY; | |
2491 | break; | |
2492 | } | |
2493 | } else | |
2494 | break; | |
2495 | set_current_state(TASK_INTERRUPTIBLE); | |
2496 | mutex_unlock(&pcm->open_mutex); | |
2497 | schedule(); | |
2498 | mutex_lock(&pcm->open_mutex); | |
2499 | if (pcm->card->shutdown) { | |
2500 | err = -ENODEV; | |
2501 | break; | |
2502 | } | |
2503 | if (signal_pending(current)) { | |
2504 | err = -ERESTARTSYS; | |
2505 | break; | |
2506 | } | |
2507 | } | |
2508 | remove_wait_queue(&pcm->open_wait, &wait); | |
2509 | mutex_unlock(&pcm->open_mutex); | |
2510 | if (err < 0) | |
2511 | goto __error; | |
2512 | return err; | |
2513 | ||
2514 | __error: | |
2515 | module_put(pcm->card->module); | |
2516 | __error2: | |
2517 | snd_card_file_remove(pcm->card, file); | |
2518 | __error1: | |
2519 | return err; | |
2520 | } | |
2521 | ||
2522 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2523 | { | |
2524 | struct snd_pcm *pcm; | |
2525 | struct snd_pcm_substream *substream; | |
2526 | struct snd_pcm_file *pcm_file; | |
2527 | ||
2528 | pcm_file = file->private_data; | |
2529 | substream = pcm_file->substream; | |
2530 | if (snd_BUG_ON(!substream)) | |
2531 | return -ENXIO; | |
2532 | pcm = substream->pcm; | |
2533 | mutex_lock(&pcm->open_mutex); | |
2534 | snd_pcm_release_substream(substream); | |
2535 | kfree(pcm_file); | |
2536 | mutex_unlock(&pcm->open_mutex); | |
2537 | wake_up(&pcm->open_wait); | |
2538 | module_put(pcm->card->module); | |
2539 | snd_card_file_remove(pcm->card, file); | |
2540 | return 0; | |
2541 | } | |
2542 | ||
2543 | /* check and update PCM state; return 0 or a negative error | |
2544 | * call this inside PCM lock | |
2545 | */ | |
2546 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) | |
2547 | { | |
2548 | switch (substream->runtime->status->state) { | |
2549 | case SNDRV_PCM_STATE_DRAINING: | |
2550 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2551 | return -EBADFD; | |
2552 | /* Fall through */ | |
2553 | case SNDRV_PCM_STATE_RUNNING: | |
2554 | return snd_pcm_update_hw_ptr(substream); | |
2555 | case SNDRV_PCM_STATE_PREPARED: | |
2556 | case SNDRV_PCM_STATE_PAUSED: | |
2557 | return 0; | |
2558 | case SNDRV_PCM_STATE_SUSPENDED: | |
2559 | return -ESTRPIPE; | |
2560 | case SNDRV_PCM_STATE_XRUN: | |
2561 | return -EPIPE; | |
2562 | default: | |
2563 | return -EBADFD; | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | /* increase the appl_ptr; returns the processed frames or a negative error */ | |
2568 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, | |
2569 | snd_pcm_uframes_t frames, | |
2570 | snd_pcm_sframes_t avail) | |
2571 | { | |
2572 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2573 | snd_pcm_sframes_t appl_ptr; | |
2574 | int ret; | |
2575 | ||
2576 | if (avail <= 0) | |
2577 | return 0; | |
2578 | if (frames > (snd_pcm_uframes_t)avail) | |
2579 | frames = avail; | |
2580 | appl_ptr = runtime->control->appl_ptr + frames; | |
2581 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2582 | appl_ptr -= runtime->boundary; | |
2583 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); | |
2584 | return ret < 0 ? ret : frames; | |
2585 | } | |
2586 | ||
2587 | /* decrease the appl_ptr; returns the processed frames or a negative error */ | |
2588 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, | |
2589 | snd_pcm_uframes_t frames, | |
2590 | snd_pcm_sframes_t avail) | |
2591 | { | |
2592 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2593 | snd_pcm_sframes_t appl_ptr; | |
2594 | int ret; | |
2595 | ||
2596 | if (avail <= 0) | |
2597 | return 0; | |
2598 | if (frames > (snd_pcm_uframes_t)avail) | |
2599 | frames = avail; | |
2600 | appl_ptr = runtime->control->appl_ptr - frames; | |
2601 | if (appl_ptr < 0) | |
2602 | appl_ptr += runtime->boundary; | |
2603 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); | |
2604 | return ret < 0 ? ret : frames; | |
2605 | } | |
2606 | ||
2607 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, | |
2608 | snd_pcm_uframes_t frames) | |
2609 | { | |
2610 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2611 | snd_pcm_sframes_t ret; | |
2612 | ||
2613 | if (frames == 0) | |
2614 | return 0; | |
2615 | ||
2616 | snd_pcm_stream_lock_irq(substream); | |
2617 | ret = do_pcm_hwsync(substream); | |
2618 | if (!ret) | |
2619 | ret = rewind_appl_ptr(substream, frames, | |
2620 | snd_pcm_playback_hw_avail(runtime)); | |
2621 | snd_pcm_stream_unlock_irq(substream); | |
2622 | return ret; | |
2623 | } | |
2624 | ||
2625 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, | |
2626 | snd_pcm_uframes_t frames) | |
2627 | { | |
2628 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2629 | snd_pcm_sframes_t ret; | |
2630 | ||
2631 | if (frames == 0) | |
2632 | return 0; | |
2633 | ||
2634 | snd_pcm_stream_lock_irq(substream); | |
2635 | ret = do_pcm_hwsync(substream); | |
2636 | if (!ret) | |
2637 | ret = rewind_appl_ptr(substream, frames, | |
2638 | snd_pcm_capture_hw_avail(runtime)); | |
2639 | snd_pcm_stream_unlock_irq(substream); | |
2640 | return ret; | |
2641 | } | |
2642 | ||
2643 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, | |
2644 | snd_pcm_uframes_t frames) | |
2645 | { | |
2646 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2647 | snd_pcm_sframes_t ret; | |
2648 | ||
2649 | if (frames == 0) | |
2650 | return 0; | |
2651 | ||
2652 | snd_pcm_stream_lock_irq(substream); | |
2653 | ret = do_pcm_hwsync(substream); | |
2654 | if (!ret) | |
2655 | ret = forward_appl_ptr(substream, frames, | |
2656 | snd_pcm_playback_avail(runtime)); | |
2657 | snd_pcm_stream_unlock_irq(substream); | |
2658 | return ret; | |
2659 | } | |
2660 | ||
2661 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, | |
2662 | snd_pcm_uframes_t frames) | |
2663 | { | |
2664 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2665 | snd_pcm_sframes_t ret; | |
2666 | ||
2667 | if (frames == 0) | |
2668 | return 0; | |
2669 | ||
2670 | snd_pcm_stream_lock_irq(substream); | |
2671 | ret = do_pcm_hwsync(substream); | |
2672 | if (!ret) | |
2673 | ret = forward_appl_ptr(substream, frames, | |
2674 | snd_pcm_capture_avail(runtime)); | |
2675 | snd_pcm_stream_unlock_irq(substream); | |
2676 | return ret; | |
2677 | } | |
2678 | ||
2679 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) | |
2680 | { | |
2681 | int err; | |
2682 | ||
2683 | snd_pcm_stream_lock_irq(substream); | |
2684 | err = do_pcm_hwsync(substream); | |
2685 | snd_pcm_stream_unlock_irq(substream); | |
2686 | return err; | |
2687 | } | |
2688 | ||
2689 | static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream) | |
2690 | { | |
2691 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2692 | int err; | |
2693 | snd_pcm_sframes_t n = 0; | |
2694 | ||
2695 | snd_pcm_stream_lock_irq(substream); | |
2696 | err = do_pcm_hwsync(substream); | |
2697 | if (!err) { | |
2698 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2699 | n = snd_pcm_playback_hw_avail(runtime); | |
2700 | else | |
2701 | n = snd_pcm_capture_avail(runtime); | |
2702 | n += runtime->delay; | |
2703 | } | |
2704 | snd_pcm_stream_unlock_irq(substream); | |
2705 | return err < 0 ? err : n; | |
2706 | } | |
2707 | ||
2708 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, | |
2709 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
2710 | { | |
2711 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2712 | struct snd_pcm_sync_ptr sync_ptr; | |
2713 | volatile struct snd_pcm_mmap_status *status; | |
2714 | volatile struct snd_pcm_mmap_control *control; | |
2715 | int err; | |
2716 | ||
2717 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2718 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2719 | return -EFAULT; | |
2720 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) | |
2721 | return -EFAULT; | |
2722 | status = runtime->status; | |
2723 | control = runtime->control; | |
2724 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2725 | err = snd_pcm_hwsync(substream); | |
2726 | if (err < 0) | |
2727 | return err; | |
2728 | } | |
2729 | snd_pcm_stream_lock_irq(substream); | |
2730 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { | |
2731 | err = pcm_lib_apply_appl_ptr(substream, | |
2732 | sync_ptr.c.control.appl_ptr); | |
2733 | if (err < 0) { | |
2734 | snd_pcm_stream_unlock_irq(substream); | |
2735 | return err; | |
2736 | } | |
2737 | } else { | |
2738 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2739 | } | |
2740 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2741 | control->avail_min = sync_ptr.c.control.avail_min; | |
2742 | else | |
2743 | sync_ptr.c.control.avail_min = control->avail_min; | |
2744 | sync_ptr.s.status.state = status->state; | |
2745 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2746 | sync_ptr.s.status.tstamp = status->tstamp; | |
2747 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2748 | snd_pcm_stream_unlock_irq(substream); | |
2749 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2750 | return -EFAULT; | |
2751 | return 0; | |
2752 | } | |
2753 | ||
2754 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2755 | { | |
2756 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2757 | int arg; | |
2758 | ||
2759 | if (get_user(arg, _arg)) | |
2760 | return -EFAULT; | |
2761 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2762 | return -EINVAL; | |
2763 | runtime->tstamp_type = arg; | |
2764 | return 0; | |
2765 | } | |
2766 | ||
2767 | static int snd_pcm_common_ioctl(struct file *file, | |
2768 | struct snd_pcm_substream *substream, | |
2769 | unsigned int cmd, void __user *arg) | |
2770 | { | |
2771 | struct snd_pcm_file *pcm_file = file->private_data; | |
2772 | ||
2773 | switch (cmd) { | |
2774 | case SNDRV_PCM_IOCTL_PVERSION: | |
2775 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2776 | case SNDRV_PCM_IOCTL_INFO: | |
2777 | return snd_pcm_info_user(substream, arg); | |
2778 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ | |
2779 | return 0; | |
2780 | case SNDRV_PCM_IOCTL_TTSTAMP: | |
2781 | return snd_pcm_tstamp(substream, arg); | |
2782 | case SNDRV_PCM_IOCTL_USER_PVERSION: | |
2783 | if (get_user(pcm_file->user_pversion, | |
2784 | (unsigned int __user *)arg)) | |
2785 | return -EFAULT; | |
2786 | return 0; | |
2787 | case SNDRV_PCM_IOCTL_HW_REFINE: | |
2788 | return snd_pcm_hw_refine_user(substream, arg); | |
2789 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2790 | return snd_pcm_hw_params_user(substream, arg); | |
2791 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2792 | return snd_pcm_hw_free(substream); | |
2793 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2794 | return snd_pcm_sw_params_user(substream, arg); | |
2795 | case SNDRV_PCM_IOCTL_STATUS: | |
2796 | return snd_pcm_status_user(substream, arg, false); | |
2797 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2798 | return snd_pcm_status_user(substream, arg, true); | |
2799 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: | |
2800 | return snd_pcm_channel_info_user(substream, arg); | |
2801 | case SNDRV_PCM_IOCTL_PREPARE: | |
2802 | return snd_pcm_prepare(substream, file); | |
2803 | case SNDRV_PCM_IOCTL_RESET: | |
2804 | return snd_pcm_reset(substream); | |
2805 | case SNDRV_PCM_IOCTL_START: | |
2806 | return snd_pcm_start_lock_irq(substream); | |
2807 | case SNDRV_PCM_IOCTL_LINK: | |
2808 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2809 | case SNDRV_PCM_IOCTL_UNLINK: | |
2810 | return snd_pcm_unlink(substream); | |
2811 | case SNDRV_PCM_IOCTL_RESUME: | |
2812 | return snd_pcm_resume(substream); | |
2813 | case SNDRV_PCM_IOCTL_XRUN: | |
2814 | return snd_pcm_xrun(substream); | |
2815 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2816 | return snd_pcm_hwsync(substream); | |
2817 | case SNDRV_PCM_IOCTL_DELAY: | |
2818 | { | |
2819 | snd_pcm_sframes_t delay = snd_pcm_delay(substream); | |
2820 | snd_pcm_sframes_t __user *res = arg; | |
2821 | ||
2822 | if (delay < 0) | |
2823 | return delay; | |
2824 | if (put_user(delay, res)) | |
2825 | return -EFAULT; | |
2826 | return 0; | |
2827 | } | |
2828 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2829 | return snd_pcm_sync_ptr(substream, arg); | |
2830 | #ifdef CONFIG_SND_SUPPORT_OLD_API | |
2831 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: | |
2832 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2833 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2834 | return snd_pcm_hw_params_old_user(substream, arg); | |
2835 | #endif | |
2836 | case SNDRV_PCM_IOCTL_DRAIN: | |
2837 | return snd_pcm_drain(substream, file); | |
2838 | case SNDRV_PCM_IOCTL_DROP: | |
2839 | return snd_pcm_drop(substream); | |
2840 | case SNDRV_PCM_IOCTL_PAUSE: | |
2841 | return snd_pcm_action_lock_irq(&snd_pcm_action_pause, | |
2842 | substream, | |
2843 | (int)(unsigned long)arg); | |
2844 | } | |
2845 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); | |
2846 | return -ENOTTY; | |
2847 | } | |
2848 | ||
2849 | static int snd_pcm_common_ioctl1(struct file *file, | |
2850 | struct snd_pcm_substream *substream, | |
2851 | unsigned int cmd, void __user *arg) | |
2852 | { | |
2853 | struct snd_card *card = substream->pcm->card; | |
2854 | int res; | |
2855 | ||
2856 | snd_power_lock(card); | |
2857 | res = snd_power_wait(card, SNDRV_CTL_POWER_D0); | |
2858 | if (res >= 0) | |
2859 | res = snd_pcm_common_ioctl(file, substream, cmd, arg); | |
2860 | snd_power_unlock(card); | |
2861 | return res; | |
2862 | } | |
2863 | ||
2864 | static int snd_pcm_playback_ioctl1(struct file *file, | |
2865 | struct snd_pcm_substream *substream, | |
2866 | unsigned int cmd, void __user *arg) | |
2867 | { | |
2868 | if (PCM_RUNTIME_CHECK(substream)) | |
2869 | return -ENXIO; | |
2870 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2871 | return -EINVAL; | |
2872 | switch (cmd) { | |
2873 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2874 | { | |
2875 | struct snd_xferi xferi; | |
2876 | struct snd_xferi __user *_xferi = arg; | |
2877 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2878 | snd_pcm_sframes_t result; | |
2879 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2880 | return -EBADFD; | |
2881 | if (put_user(0, &_xferi->result)) | |
2882 | return -EFAULT; | |
2883 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2884 | return -EFAULT; | |
2885 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2886 | __put_user(result, &_xferi->result); | |
2887 | return result < 0 ? result : 0; | |
2888 | } | |
2889 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2890 | { | |
2891 | struct snd_xfern xfern; | |
2892 | struct snd_xfern __user *_xfern = arg; | |
2893 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2894 | void __user **bufs; | |
2895 | snd_pcm_sframes_t result; | |
2896 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2897 | return -EBADFD; | |
2898 | if (runtime->channels > 128) | |
2899 | return -EINVAL; | |
2900 | if (put_user(0, &_xfern->result)) | |
2901 | return -EFAULT; | |
2902 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2903 | return -EFAULT; | |
2904 | ||
2905 | bufs = memdup_user(xfern.bufs, | |
2906 | sizeof(void *) * runtime->channels); | |
2907 | if (IS_ERR(bufs)) | |
2908 | return PTR_ERR(bufs); | |
2909 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); | |
2910 | kfree(bufs); | |
2911 | __put_user(result, &_xfern->result); | |
2912 | return result < 0 ? result : 0; | |
2913 | } | |
2914 | case SNDRV_PCM_IOCTL_REWIND: | |
2915 | { | |
2916 | snd_pcm_uframes_t frames; | |
2917 | snd_pcm_uframes_t __user *_frames = arg; | |
2918 | snd_pcm_sframes_t result; | |
2919 | if (get_user(frames, _frames)) | |
2920 | return -EFAULT; | |
2921 | if (put_user(0, _frames)) | |
2922 | return -EFAULT; | |
2923 | result = snd_pcm_playback_rewind(substream, frames); | |
2924 | __put_user(result, _frames); | |
2925 | return result < 0 ? result : 0; | |
2926 | } | |
2927 | case SNDRV_PCM_IOCTL_FORWARD: | |
2928 | { | |
2929 | snd_pcm_uframes_t frames; | |
2930 | snd_pcm_uframes_t __user *_frames = arg; | |
2931 | snd_pcm_sframes_t result; | |
2932 | if (get_user(frames, _frames)) | |
2933 | return -EFAULT; | |
2934 | if (put_user(0, _frames)) | |
2935 | return -EFAULT; | |
2936 | result = snd_pcm_playback_forward(substream, frames); | |
2937 | __put_user(result, _frames); | |
2938 | return result < 0 ? result : 0; | |
2939 | } | |
2940 | } | |
2941 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); | |
2942 | } | |
2943 | ||
2944 | static int snd_pcm_capture_ioctl1(struct file *file, | |
2945 | struct snd_pcm_substream *substream, | |
2946 | unsigned int cmd, void __user *arg) | |
2947 | { | |
2948 | if (PCM_RUNTIME_CHECK(substream)) | |
2949 | return -ENXIO; | |
2950 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2951 | return -EINVAL; | |
2952 | switch (cmd) { | |
2953 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2954 | { | |
2955 | struct snd_xferi xferi; | |
2956 | struct snd_xferi __user *_xferi = arg; | |
2957 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2958 | snd_pcm_sframes_t result; | |
2959 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2960 | return -EBADFD; | |
2961 | if (put_user(0, &_xferi->result)) | |
2962 | return -EFAULT; | |
2963 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2964 | return -EFAULT; | |
2965 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2966 | __put_user(result, &_xferi->result); | |
2967 | return result < 0 ? result : 0; | |
2968 | } | |
2969 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2970 | { | |
2971 | struct snd_xfern xfern; | |
2972 | struct snd_xfern __user *_xfern = arg; | |
2973 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2974 | void *bufs; | |
2975 | snd_pcm_sframes_t result; | |
2976 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2977 | return -EBADFD; | |
2978 | if (runtime->channels > 128) | |
2979 | return -EINVAL; | |
2980 | if (put_user(0, &_xfern->result)) | |
2981 | return -EFAULT; | |
2982 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2983 | return -EFAULT; | |
2984 | ||
2985 | bufs = memdup_user(xfern.bufs, | |
2986 | sizeof(void *) * runtime->channels); | |
2987 | if (IS_ERR(bufs)) | |
2988 | return PTR_ERR(bufs); | |
2989 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); | |
2990 | kfree(bufs); | |
2991 | __put_user(result, &_xfern->result); | |
2992 | return result < 0 ? result : 0; | |
2993 | } | |
2994 | case SNDRV_PCM_IOCTL_REWIND: | |
2995 | { | |
2996 | snd_pcm_uframes_t frames; | |
2997 | snd_pcm_uframes_t __user *_frames = arg; | |
2998 | snd_pcm_sframes_t result; | |
2999 | if (get_user(frames, _frames)) | |
3000 | return -EFAULT; | |
3001 | if (put_user(0, _frames)) | |
3002 | return -EFAULT; | |
3003 | result = snd_pcm_capture_rewind(substream, frames); | |
3004 | __put_user(result, _frames); | |
3005 | return result < 0 ? result : 0; | |
3006 | } | |
3007 | case SNDRV_PCM_IOCTL_FORWARD: | |
3008 | { | |
3009 | snd_pcm_uframes_t frames; | |
3010 | snd_pcm_uframes_t __user *_frames = arg; | |
3011 | snd_pcm_sframes_t result; | |
3012 | if (get_user(frames, _frames)) | |
3013 | return -EFAULT; | |
3014 | if (put_user(0, _frames)) | |
3015 | return -EFAULT; | |
3016 | result = snd_pcm_capture_forward(substream, frames); | |
3017 | __put_user(result, _frames); | |
3018 | return result < 0 ? result : 0; | |
3019 | } | |
3020 | } | |
3021 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); | |
3022 | } | |
3023 | ||
3024 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, | |
3025 | unsigned long arg) | |
3026 | { | |
3027 | struct snd_pcm_file *pcm_file; | |
3028 | ||
3029 | pcm_file = file->private_data; | |
3030 | ||
3031 | if (((cmd >> 8) & 0xff) != 'A') | |
3032 | return -ENOTTY; | |
3033 | ||
3034 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, | |
3035 | (void __user *)arg); | |
3036 | } | |
3037 | ||
3038 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, | |
3039 | unsigned long arg) | |
3040 | { | |
3041 | struct snd_pcm_file *pcm_file; | |
3042 | ||
3043 | pcm_file = file->private_data; | |
3044 | ||
3045 | if (((cmd >> 8) & 0xff) != 'A') | |
3046 | return -ENOTTY; | |
3047 | ||
3048 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, | |
3049 | (void __user *)arg); | |
3050 | } | |
3051 | ||
3052 | /** | |
3053 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space | |
3054 | * @substream: PCM substream | |
3055 | * @cmd: IOCTL cmd | |
3056 | * @arg: IOCTL argument | |
3057 | * | |
3058 | * The function is provided primarily for OSS layer and USB gadget drivers, | |
3059 | * and it allows only the limited set of ioctls (hw_params, sw_params, | |
3060 | * prepare, start, drain, drop, forward). | |
3061 | */ | |
3062 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, | |
3063 | unsigned int cmd, void *arg) | |
3064 | { | |
3065 | snd_pcm_uframes_t *frames = arg; | |
3066 | snd_pcm_sframes_t result; | |
3067 | int err; | |
3068 | ||
3069 | switch (cmd) { | |
3070 | case SNDRV_PCM_IOCTL_FORWARD: | |
3071 | { | |
3072 | /* provided only for OSS; capture-only and no value returned */ | |
3073 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
3074 | return -EINVAL; | |
3075 | result = snd_pcm_capture_forward(substream, *frames); | |
3076 | return result < 0 ? result : 0; | |
3077 | } | |
3078 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
3079 | return snd_pcm_hw_params(substream, arg); | |
3080 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
3081 | return snd_pcm_sw_params(substream, arg); | |
3082 | case SNDRV_PCM_IOCTL_PREPARE: | |
3083 | return snd_pcm_prepare(substream, NULL); | |
3084 | case SNDRV_PCM_IOCTL_START: | |
3085 | return snd_pcm_start_lock_irq(substream); | |
3086 | case SNDRV_PCM_IOCTL_DRAIN: | |
3087 | snd_power_lock(substream->pcm->card); | |
3088 | err = snd_pcm_drain(substream, NULL); | |
3089 | snd_power_unlock(substream->pcm->card); | |
3090 | return err; | |
3091 | case SNDRV_PCM_IOCTL_DROP: | |
3092 | return snd_pcm_drop(substream); | |
3093 | case SNDRV_PCM_IOCTL_DELAY: | |
3094 | { | |
3095 | result = snd_pcm_delay(substream); | |
3096 | if (result < 0) | |
3097 | return result; | |
3098 | *frames = result; | |
3099 | return 0; | |
3100 | } | |
3101 | default: | |
3102 | return -EINVAL; | |
3103 | } | |
3104 | } | |
3105 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); | |
3106 | ||
3107 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, | |
3108 | loff_t * offset) | |
3109 | { | |
3110 | struct snd_pcm_file *pcm_file; | |
3111 | struct snd_pcm_substream *substream; | |
3112 | struct snd_pcm_runtime *runtime; | |
3113 | snd_pcm_sframes_t result; | |
3114 | ||
3115 | pcm_file = file->private_data; | |
3116 | substream = pcm_file->substream; | |
3117 | if (PCM_RUNTIME_CHECK(substream)) | |
3118 | return -ENXIO; | |
3119 | runtime = substream->runtime; | |
3120 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3121 | return -EBADFD; | |
3122 | if (!frame_aligned(runtime, count)) | |
3123 | return -EINVAL; | |
3124 | count = bytes_to_frames(runtime, count); | |
3125 | result = snd_pcm_lib_read(substream, buf, count); | |
3126 | if (result > 0) | |
3127 | result = frames_to_bytes(runtime, result); | |
3128 | return result; | |
3129 | } | |
3130 | ||
3131 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, | |
3132 | size_t count, loff_t * offset) | |
3133 | { | |
3134 | struct snd_pcm_file *pcm_file; | |
3135 | struct snd_pcm_substream *substream; | |
3136 | struct snd_pcm_runtime *runtime; | |
3137 | snd_pcm_sframes_t result; | |
3138 | ||
3139 | pcm_file = file->private_data; | |
3140 | substream = pcm_file->substream; | |
3141 | if (PCM_RUNTIME_CHECK(substream)) | |
3142 | return -ENXIO; | |
3143 | runtime = substream->runtime; | |
3144 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3145 | return -EBADFD; | |
3146 | if (!frame_aligned(runtime, count)) | |
3147 | return -EINVAL; | |
3148 | count = bytes_to_frames(runtime, count); | |
3149 | result = snd_pcm_lib_write(substream, buf, count); | |
3150 | if (result > 0) | |
3151 | result = frames_to_bytes(runtime, result); | |
3152 | return result; | |
3153 | } | |
3154 | ||
3155 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) | |
3156 | { | |
3157 | struct snd_pcm_file *pcm_file; | |
3158 | struct snd_pcm_substream *substream; | |
3159 | struct snd_pcm_runtime *runtime; | |
3160 | snd_pcm_sframes_t result; | |
3161 | unsigned long i; | |
3162 | void __user **bufs; | |
3163 | snd_pcm_uframes_t frames; | |
3164 | ||
3165 | pcm_file = iocb->ki_filp->private_data; | |
3166 | substream = pcm_file->substream; | |
3167 | if (PCM_RUNTIME_CHECK(substream)) | |
3168 | return -ENXIO; | |
3169 | runtime = substream->runtime; | |
3170 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3171 | return -EBADFD; | |
3172 | if (!iter_is_iovec(to)) | |
3173 | return -EINVAL; | |
3174 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
3175 | return -EINVAL; | |
3176 | if (!frame_aligned(runtime, to->iov->iov_len)) | |
3177 | return -EINVAL; | |
3178 | frames = bytes_to_samples(runtime, to->iov->iov_len); | |
3179 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
3180 | if (bufs == NULL) | |
3181 | return -ENOMEM; | |
3182 | for (i = 0; i < to->nr_segs; ++i) | |
3183 | bufs[i] = to->iov[i].iov_base; | |
3184 | result = snd_pcm_lib_readv(substream, bufs, frames); | |
3185 | if (result > 0) | |
3186 | result = frames_to_bytes(runtime, result); | |
3187 | kfree(bufs); | |
3188 | return result; | |
3189 | } | |
3190 | ||
3191 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) | |
3192 | { | |
3193 | struct snd_pcm_file *pcm_file; | |
3194 | struct snd_pcm_substream *substream; | |
3195 | struct snd_pcm_runtime *runtime; | |
3196 | snd_pcm_sframes_t result; | |
3197 | unsigned long i; | |
3198 | void __user **bufs; | |
3199 | snd_pcm_uframes_t frames; | |
3200 | ||
3201 | pcm_file = iocb->ki_filp->private_data; | |
3202 | substream = pcm_file->substream; | |
3203 | if (PCM_RUNTIME_CHECK(substream)) | |
3204 | return -ENXIO; | |
3205 | runtime = substream->runtime; | |
3206 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3207 | return -EBADFD; | |
3208 | if (!iter_is_iovec(from)) | |
3209 | return -EINVAL; | |
3210 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3211 | !frame_aligned(runtime, from->iov->iov_len)) | |
3212 | return -EINVAL; | |
3213 | frames = bytes_to_samples(runtime, from->iov->iov_len); | |
3214 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
3215 | if (bufs == NULL) | |
3216 | return -ENOMEM; | |
3217 | for (i = 0; i < from->nr_segs; ++i) | |
3218 | bufs[i] = from->iov[i].iov_base; | |
3219 | result = snd_pcm_lib_writev(substream, bufs, frames); | |
3220 | if (result > 0) | |
3221 | result = frames_to_bytes(runtime, result); | |
3222 | kfree(bufs); | |
3223 | return result; | |
3224 | } | |
3225 | ||
3226 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3227 | { | |
3228 | struct snd_pcm_file *pcm_file; | |
3229 | struct snd_pcm_substream *substream; | |
3230 | struct snd_pcm_runtime *runtime; | |
3231 | unsigned int mask; | |
3232 | snd_pcm_uframes_t avail; | |
3233 | ||
3234 | pcm_file = file->private_data; | |
3235 | ||
3236 | substream = pcm_file->substream; | |
3237 | if (PCM_RUNTIME_CHECK(substream)) | |
3238 | return POLLOUT | POLLWRNORM | POLLERR; | |
3239 | runtime = substream->runtime; | |
3240 | ||
3241 | poll_wait(file, &runtime->sleep, wait); | |
3242 | ||
3243 | snd_pcm_stream_lock_irq(substream); | |
3244 | avail = snd_pcm_playback_avail(runtime); | |
3245 | switch (runtime->status->state) { | |
3246 | case SNDRV_PCM_STATE_RUNNING: | |
3247 | case SNDRV_PCM_STATE_PREPARED: | |
3248 | case SNDRV_PCM_STATE_PAUSED: | |
3249 | if (avail >= runtime->control->avail_min) { | |
3250 | mask = POLLOUT | POLLWRNORM; | |
3251 | break; | |
3252 | } | |
3253 | /* Fall through */ | |
3254 | case SNDRV_PCM_STATE_DRAINING: | |
3255 | mask = 0; | |
3256 | break; | |
3257 | default: | |
3258 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3259 | break; | |
3260 | } | |
3261 | snd_pcm_stream_unlock_irq(substream); | |
3262 | return mask; | |
3263 | } | |
3264 | ||
3265 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3266 | { | |
3267 | struct snd_pcm_file *pcm_file; | |
3268 | struct snd_pcm_substream *substream; | |
3269 | struct snd_pcm_runtime *runtime; | |
3270 | unsigned int mask; | |
3271 | snd_pcm_uframes_t avail; | |
3272 | ||
3273 | pcm_file = file->private_data; | |
3274 | ||
3275 | substream = pcm_file->substream; | |
3276 | if (PCM_RUNTIME_CHECK(substream)) | |
3277 | return POLLIN | POLLRDNORM | POLLERR; | |
3278 | runtime = substream->runtime; | |
3279 | ||
3280 | poll_wait(file, &runtime->sleep, wait); | |
3281 | ||
3282 | snd_pcm_stream_lock_irq(substream); | |
3283 | avail = snd_pcm_capture_avail(runtime); | |
3284 | switch (runtime->status->state) { | |
3285 | case SNDRV_PCM_STATE_RUNNING: | |
3286 | case SNDRV_PCM_STATE_PREPARED: | |
3287 | case SNDRV_PCM_STATE_PAUSED: | |
3288 | if (avail >= runtime->control->avail_min) { | |
3289 | mask = POLLIN | POLLRDNORM; | |
3290 | break; | |
3291 | } | |
3292 | mask = 0; | |
3293 | break; | |
3294 | case SNDRV_PCM_STATE_DRAINING: | |
3295 | if (avail > 0) { | |
3296 | mask = POLLIN | POLLRDNORM; | |
3297 | break; | |
3298 | } | |
3299 | /* Fall through */ | |
3300 | default: | |
3301 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3302 | break; | |
3303 | } | |
3304 | snd_pcm_stream_unlock_irq(substream); | |
3305 | return mask; | |
3306 | } | |
3307 | ||
3308 | /* | |
3309 | * mmap support | |
3310 | */ | |
3311 | ||
3312 | /* | |
3313 | * Only on coherent architectures, we can mmap the status and the control records | |
3314 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3315 | */ | |
3316 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3317 | /* | |
3318 | * mmap status record | |
3319 | */ | |
3320 | static int snd_pcm_mmap_status_fault(struct vm_fault *vmf) | |
3321 | { | |
3322 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; | |
3323 | struct snd_pcm_runtime *runtime; | |
3324 | ||
3325 | if (substream == NULL) | |
3326 | return VM_FAULT_SIGBUS; | |
3327 | runtime = substream->runtime; | |
3328 | vmf->page = virt_to_page(runtime->status); | |
3329 | get_page(vmf->page); | |
3330 | return 0; | |
3331 | } | |
3332 | ||
3333 | static const struct vm_operations_struct snd_pcm_vm_ops_status = | |
3334 | { | |
3335 | .fault = snd_pcm_mmap_status_fault, | |
3336 | }; | |
3337 | ||
3338 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, | |
3339 | struct vm_area_struct *area) | |
3340 | { | |
3341 | long size; | |
3342 | if (!(area->vm_flags & VM_READ)) | |
3343 | return -EINVAL; | |
3344 | size = area->vm_end - area->vm_start; | |
3345 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) | |
3346 | return -EINVAL; | |
3347 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3348 | area->vm_private_data = substream; | |
3349 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; | |
3350 | return 0; | |
3351 | } | |
3352 | ||
3353 | /* | |
3354 | * mmap control record | |
3355 | */ | |
3356 | static int snd_pcm_mmap_control_fault(struct vm_fault *vmf) | |
3357 | { | |
3358 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; | |
3359 | struct snd_pcm_runtime *runtime; | |
3360 | ||
3361 | if (substream == NULL) | |
3362 | return VM_FAULT_SIGBUS; | |
3363 | runtime = substream->runtime; | |
3364 | vmf->page = virt_to_page(runtime->control); | |
3365 | get_page(vmf->page); | |
3366 | return 0; | |
3367 | } | |
3368 | ||
3369 | static const struct vm_operations_struct snd_pcm_vm_ops_control = | |
3370 | { | |
3371 | .fault = snd_pcm_mmap_control_fault, | |
3372 | }; | |
3373 | ||
3374 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, | |
3375 | struct vm_area_struct *area) | |
3376 | { | |
3377 | long size; | |
3378 | if (!(area->vm_flags & VM_READ)) | |
3379 | return -EINVAL; | |
3380 | size = area->vm_end - area->vm_start; | |
3381 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) | |
3382 | return -EINVAL; | |
3383 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3384 | area->vm_private_data = substream; | |
3385 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; | |
3386 | return 0; | |
3387 | } | |
3388 | ||
3389 | static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3390 | { | |
3391 | if (pcm_file->no_compat_mmap) | |
3392 | return false; | |
3393 | /* See pcm_control_mmap_allowed() below. | |
3394 | * Since older alsa-lib requires both status and control mmaps to be | |
3395 | * coupled, we have to disable the status mmap for old alsa-lib, too. | |
3396 | */ | |
3397 | if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) && | |
3398 | (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)) | |
3399 | return false; | |
3400 | return true; | |
3401 | } | |
3402 | ||
3403 | static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3404 | { | |
3405 | if (pcm_file->no_compat_mmap) | |
3406 | return false; | |
3407 | /* Disallow the control mmap when SYNC_APPLPTR flag is set; | |
3408 | * it enforces the user-space to fall back to snd_pcm_sync_ptr(), | |
3409 | * thus it effectively assures the manual update of appl_ptr. | |
3410 | */ | |
3411 | if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR) | |
3412 | return false; | |
3413 | return true; | |
3414 | } | |
3415 | ||
3416 | #else /* ! coherent mmap */ | |
3417 | /* | |
3418 | * don't support mmap for status and control records. | |
3419 | */ | |
3420 | #define pcm_status_mmap_allowed(pcm_file) false | |
3421 | #define pcm_control_mmap_allowed(pcm_file) false | |
3422 | ||
3423 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, | |
3424 | struct vm_area_struct *area) | |
3425 | { | |
3426 | return -ENXIO; | |
3427 | } | |
3428 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, | |
3429 | struct vm_area_struct *area) | |
3430 | { | |
3431 | return -ENXIO; | |
3432 | } | |
3433 | #endif /* coherent mmap */ | |
3434 | ||
3435 | static inline struct page * | |
3436 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3437 | { | |
3438 | void *vaddr = substream->runtime->dma_area + ofs; | |
3439 | return virt_to_page(vaddr); | |
3440 | } | |
3441 | ||
3442 | /* | |
3443 | * fault callback for mmapping a RAM page | |
3444 | */ | |
3445 | static int snd_pcm_mmap_data_fault(struct vm_fault *vmf) | |
3446 | { | |
3447 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; | |
3448 | struct snd_pcm_runtime *runtime; | |
3449 | unsigned long offset; | |
3450 | struct page * page; | |
3451 | size_t dma_bytes; | |
3452 | ||
3453 | if (substream == NULL) | |
3454 | return VM_FAULT_SIGBUS; | |
3455 | runtime = substream->runtime; | |
3456 | offset = vmf->pgoff << PAGE_SHIFT; | |
3457 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3458 | if (offset > dma_bytes - PAGE_SIZE) | |
3459 | return VM_FAULT_SIGBUS; | |
3460 | if (substream->ops->page) | |
3461 | page = substream->ops->page(substream, offset); | |
3462 | else | |
3463 | page = snd_pcm_default_page_ops(substream, offset); | |
3464 | if (!page) | |
3465 | return VM_FAULT_SIGBUS; | |
3466 | get_page(page); | |
3467 | vmf->page = page; | |
3468 | return 0; | |
3469 | } | |
3470 | ||
3471 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { | |
3472 | .open = snd_pcm_mmap_data_open, | |
3473 | .close = snd_pcm_mmap_data_close, | |
3474 | }; | |
3475 | ||
3476 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
3477 | .open = snd_pcm_mmap_data_open, | |
3478 | .close = snd_pcm_mmap_data_close, | |
3479 | .fault = snd_pcm_mmap_data_fault, | |
3480 | }; | |
3481 | ||
3482 | /* | |
3483 | * mmap the DMA buffer on RAM | |
3484 | */ | |
3485 | ||
3486 | /** | |
3487 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3488 | * @substream: PCM substream | |
3489 | * @area: VMA | |
3490 | * | |
3491 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3492 | * this function is invoked implicitly. | |
3493 | */ | |
3494 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, | |
3495 | struct vm_area_struct *area) | |
3496 | { | |
3497 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; | |
3498 | #ifdef CONFIG_GENERIC_ALLOCATOR | |
3499 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { | |
3500 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3501 | return remap_pfn_range(area, area->vm_start, | |
3502 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3503 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3504 | } | |
3505 | #endif /* CONFIG_GENERIC_ALLOCATOR */ | |
3506 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ | |
3507 | if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page && | |
3508 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3509 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3510 | area, | |
3511 | substream->runtime->dma_area, | |
3512 | substream->runtime->dma_addr, | |
3513 | area->vm_end - area->vm_start); | |
3514 | #endif /* CONFIG_X86 */ | |
3515 | /* mmap with fault handler */ | |
3516 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
3517 | return 0; | |
3518 | } | |
3519 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); | |
3520 | ||
3521 | /* | |
3522 | * mmap the DMA buffer on I/O memory area | |
3523 | */ | |
3524 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
3525 | /** | |
3526 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3527 | * @substream: PCM substream | |
3528 | * @area: VMA | |
3529 | * | |
3530 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3531 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3532 | * is supposed to work only on limited architectures. | |
3533 | */ | |
3534 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, | |
3535 | struct vm_area_struct *area) | |
3536 | { | |
3537 | struct snd_pcm_runtime *runtime = substream->runtime;; | |
3538 | ||
3539 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); | |
3540 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); | |
3541 | } | |
3542 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
3543 | #endif /* SNDRV_PCM_INFO_MMAP */ | |
3544 | ||
3545 | /* | |
3546 | * mmap DMA buffer | |
3547 | */ | |
3548 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, | |
3549 | struct vm_area_struct *area) | |
3550 | { | |
3551 | struct snd_pcm_runtime *runtime; | |
3552 | long size; | |
3553 | unsigned long offset; | |
3554 | size_t dma_bytes; | |
3555 | int err; | |
3556 | ||
3557 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3558 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3559 | return -EINVAL; | |
3560 | } else { | |
3561 | if (!(area->vm_flags & VM_READ)) | |
3562 | return -EINVAL; | |
3563 | } | |
3564 | runtime = substream->runtime; | |
3565 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3566 | return -EBADFD; | |
3567 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3568 | return -ENXIO; | |
3569 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3570 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3571 | return -EINVAL; | |
3572 | size = area->vm_end - area->vm_start; | |
3573 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3574 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3575 | if ((size_t)size > dma_bytes) | |
3576 | return -EINVAL; | |
3577 | if (offset > dma_bytes - size) | |
3578 | return -EINVAL; | |
3579 | ||
3580 | area->vm_ops = &snd_pcm_vm_ops_data; | |
3581 | area->vm_private_data = substream; | |
3582 | if (substream->ops->mmap) | |
3583 | err = substream->ops->mmap(substream, area); | |
3584 | else | |
3585 | err = snd_pcm_lib_default_mmap(substream, area); | |
3586 | if (!err) | |
3587 | atomic_inc(&substream->mmap_count); | |
3588 | return err; | |
3589 | } | |
3590 | EXPORT_SYMBOL(snd_pcm_mmap_data); | |
3591 | ||
3592 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) | |
3593 | { | |
3594 | struct snd_pcm_file * pcm_file; | |
3595 | struct snd_pcm_substream *substream; | |
3596 | unsigned long offset; | |
3597 | ||
3598 | pcm_file = file->private_data; | |
3599 | substream = pcm_file->substream; | |
3600 | if (PCM_RUNTIME_CHECK(substream)) | |
3601 | return -ENXIO; | |
3602 | ||
3603 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3604 | switch (offset) { | |
3605 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3606 | if (!pcm_status_mmap_allowed(pcm_file)) | |
3607 | return -ENXIO; | |
3608 | return snd_pcm_mmap_status(substream, file, area); | |
3609 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3610 | if (!pcm_control_mmap_allowed(pcm_file)) | |
3611 | return -ENXIO; | |
3612 | return snd_pcm_mmap_control(substream, file, area); | |
3613 | default: | |
3614 | return snd_pcm_mmap_data(substream, file, area); | |
3615 | } | |
3616 | return 0; | |
3617 | } | |
3618 | ||
3619 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3620 | { | |
3621 | struct snd_pcm_file * pcm_file; | |
3622 | struct snd_pcm_substream *substream; | |
3623 | struct snd_pcm_runtime *runtime; | |
3624 | ||
3625 | pcm_file = file->private_data; | |
3626 | substream = pcm_file->substream; | |
3627 | if (PCM_RUNTIME_CHECK(substream)) | |
3628 | return -ENXIO; | |
3629 | runtime = substream->runtime; | |
3630 | return fasync_helper(fd, file, on, &runtime->fasync); | |
3631 | } | |
3632 | ||
3633 | /* | |
3634 | * ioctl32 compat | |
3635 | */ | |
3636 | #ifdef CONFIG_COMPAT | |
3637 | #include "pcm_compat.c" | |
3638 | #else | |
3639 | #define snd_pcm_ioctl_compat NULL | |
3640 | #endif | |
3641 | ||
3642 | /* | |
3643 | * To be removed helpers to keep binary compatibility | |
3644 | */ | |
3645 | ||
3646 | #ifdef CONFIG_SND_SUPPORT_OLD_API | |
3647 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) | |
3648 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3649 | ||
3650 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, | |
3651 | struct snd_pcm_hw_params_old *oparams) | |
3652 | { | |
3653 | unsigned int i; | |
3654 | ||
3655 | memset(params, 0, sizeof(*params)); | |
3656 | params->flags = oparams->flags; | |
3657 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3658 | params->masks[i].bits[0] = oparams->masks[i]; | |
3659 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3660 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3661 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3662 | params->info = oparams->info; | |
3663 | params->msbits = oparams->msbits; | |
3664 | params->rate_num = oparams->rate_num; | |
3665 | params->rate_den = oparams->rate_den; | |
3666 | params->fifo_size = oparams->fifo_size; | |
3667 | } | |
3668 | ||
3669 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, | |
3670 | struct snd_pcm_hw_params *params) | |
3671 | { | |
3672 | unsigned int i; | |
3673 | ||
3674 | memset(oparams, 0, sizeof(*oparams)); | |
3675 | oparams->flags = params->flags; | |
3676 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3677 | oparams->masks[i] = params->masks[i].bits[0]; | |
3678 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3679 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3680 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3681 | oparams->info = params->info; | |
3682 | oparams->msbits = params->msbits; | |
3683 | oparams->rate_num = params->rate_num; | |
3684 | oparams->rate_den = params->rate_den; | |
3685 | oparams->fifo_size = params->fifo_size; | |
3686 | } | |
3687 | ||
3688 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, | |
3689 | struct snd_pcm_hw_params_old __user * _oparams) | |
3690 | { | |
3691 | struct snd_pcm_hw_params *params; | |
3692 | struct snd_pcm_hw_params_old *oparams = NULL; | |
3693 | int err; | |
3694 | ||
3695 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3696 | if (!params) | |
3697 | return -ENOMEM; | |
3698 | ||
3699 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3700 | if (IS_ERR(oparams)) { | |
3701 | err = PTR_ERR(oparams); | |
3702 | goto out; | |
3703 | } | |
3704 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3705 | err = snd_pcm_hw_refine(substream, params); | |
3706 | if (err < 0) | |
3707 | goto out_old; | |
3708 | ||
3709 | err = fixup_unreferenced_params(substream, params); | |
3710 | if (err < 0) | |
3711 | goto out_old; | |
3712 | ||
3713 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3714 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3715 | err = -EFAULT; | |
3716 | out_old: | |
3717 | kfree(oparams); | |
3718 | out: | |
3719 | kfree(params); | |
3720 | return err; | |
3721 | } | |
3722 | ||
3723 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
3724 | struct snd_pcm_hw_params_old __user * _oparams) | |
3725 | { | |
3726 | struct snd_pcm_hw_params *params; | |
3727 | struct snd_pcm_hw_params_old *oparams = NULL; | |
3728 | int err; | |
3729 | ||
3730 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
3731 | if (!params) | |
3732 | return -ENOMEM; | |
3733 | ||
3734 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3735 | if (IS_ERR(oparams)) { | |
3736 | err = PTR_ERR(oparams); | |
3737 | goto out; | |
3738 | } | |
3739 | ||
3740 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3741 | err = snd_pcm_hw_params(substream, params); | |
3742 | if (err < 0) | |
3743 | goto out_old; | |
3744 | ||
3745 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3746 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3747 | err = -EFAULT; | |
3748 | out_old: | |
3749 | kfree(oparams); | |
3750 | out: | |
3751 | kfree(params); | |
3752 | return err; | |
3753 | } | |
3754 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ | |
3755 | ||
3756 | #ifndef CONFIG_MMU | |
3757 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, | |
3758 | unsigned long addr, | |
3759 | unsigned long len, | |
3760 | unsigned long pgoff, | |
3761 | unsigned long flags) | |
3762 | { | |
3763 | struct snd_pcm_file *pcm_file = file->private_data; | |
3764 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3765 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3766 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3767 | ||
3768 | switch (offset) { | |
3769 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3770 | return (unsigned long)runtime->status; | |
3771 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3772 | return (unsigned long)runtime->control; | |
3773 | default: | |
3774 | return (unsigned long)runtime->dma_area + offset; | |
3775 | } | |
3776 | } | |
3777 | #else | |
3778 | # define snd_pcm_get_unmapped_area NULL | |
3779 | #endif | |
3780 | ||
3781 | /* | |
3782 | * Register section | |
3783 | */ | |
3784 | ||
3785 | const struct file_operations snd_pcm_f_ops[2] = { | |
3786 | { | |
3787 | .owner = THIS_MODULE, | |
3788 | .write = snd_pcm_write, | |
3789 | .write_iter = snd_pcm_writev, | |
3790 | .open = snd_pcm_playback_open, | |
3791 | .release = snd_pcm_release, | |
3792 | .llseek = no_llseek, | |
3793 | .poll = snd_pcm_playback_poll, | |
3794 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3795 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3796 | .mmap = snd_pcm_mmap, | |
3797 | .fasync = snd_pcm_fasync, | |
3798 | .get_unmapped_area = snd_pcm_get_unmapped_area, | |
3799 | }, | |
3800 | { | |
3801 | .owner = THIS_MODULE, | |
3802 | .read = snd_pcm_read, | |
3803 | .read_iter = snd_pcm_readv, | |
3804 | .open = snd_pcm_capture_open, | |
3805 | .release = snd_pcm_release, | |
3806 | .llseek = no_llseek, | |
3807 | .poll = snd_pcm_capture_poll, | |
3808 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3809 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3810 | .mmap = snd_pcm_mmap, | |
3811 | .fasync = snd_pcm_fasync, | |
3812 | .get_unmapped_area = snd_pcm_get_unmapped_area, | |
3813 | } | |
3814 | }; |