Branch data Line data Source code
1 : : // SPDX-License-Identifier: GPL-2.0-or-later
2 : : /*
3 : : * Digital Audio (PCM) abstract layer
4 : : * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 : : */
6 : :
7 : : #include <linux/compat.h>
8 : : #include <linux/mm.h>
9 : : #include <linux/module.h>
10 : : #include <linux/file.h>
11 : : #include <linux/slab.h>
12 : : #include <linux/sched/signal.h>
13 : : #include <linux/time.h>
14 : : #include <linux/pm_qos.h>
15 : : #include <linux/io.h>
16 : : #include <linux/dma-mapping.h>
17 : : #include <linux/vmalloc.h>
18 : : #include <sound/core.h>
19 : : #include <sound/control.h>
20 : : #include <sound/info.h>
21 : : #include <sound/pcm.h>
22 : : #include <sound/pcm_params.h>
23 : : #include <sound/timer.h>
24 : : #include <sound/minors.h>
25 : : #include <linux/uio.h>
26 : : #include <linux/delay.h>
27 : :
28 : : #include "pcm_local.h"
29 : :
30 : : #ifdef CONFIG_SND_DEBUG
31 : : #define CREATE_TRACE_POINTS
32 : : #include "pcm_param_trace.h"
33 : : #else
34 : : #define trace_hw_mask_param_enabled() 0
35 : : #define trace_hw_interval_param_enabled() 0
36 : : #define trace_hw_mask_param(substream, type, index, prev, curr)
37 : : #define trace_hw_interval_param(substream, type, index, prev, curr)
38 : : #endif
39 : :
40 : : /*
41 : : * Compatibility
42 : : */
43 : :
44 : : struct snd_pcm_hw_params_old {
45 : : unsigned int flags;
46 : : unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
47 : : SNDRV_PCM_HW_PARAM_ACCESS + 1];
48 : : struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
49 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
50 : : unsigned int rmask;
51 : : unsigned int cmask;
52 : : unsigned int info;
53 : : unsigned int msbits;
54 : : unsigned int rate_num;
55 : : unsigned int rate_den;
56 : : snd_pcm_uframes_t fifo_size;
57 : : unsigned char reserved[64];
58 : : };
59 : :
60 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
61 : : #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
62 : : #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
63 : :
64 : : static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
65 : : struct snd_pcm_hw_params_old __user * _oparams);
66 : : static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
67 : : struct snd_pcm_hw_params_old __user * _oparams);
68 : : #endif
69 : : static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
70 : :
71 : : /*
72 : : *
73 : : */
74 : :
75 : : static DECLARE_RWSEM(snd_pcm_link_rwsem);
76 : :
77 : 0 : void snd_pcm_group_init(struct snd_pcm_group *group)
78 : : {
79 : 0 : spin_lock_init(&group->lock);
80 : 0 : mutex_init(&group->mutex);
81 : 0 : INIT_LIST_HEAD(&group->substreams);
82 : 0 : refcount_set(&group->refs, 1);
83 : 0 : }
84 : :
85 : : /* define group lock helpers */
86 : : #define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
87 : : static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
88 : : { \
89 : : if (nonatomic) \
90 : : mutex_ ## mutex_action(&group->mutex); \
91 : : else \
92 : : spin_ ## action(&group->lock); \
93 : : }
94 : :
95 : 0 : DEFINE_PCM_GROUP_LOCK(lock, lock);
96 : 0 : DEFINE_PCM_GROUP_LOCK(unlock, unlock);
97 : 0 : DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
98 : 0 : DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
99 : :
100 : : /**
101 : : * snd_pcm_stream_lock - Lock the PCM stream
102 : : * @substream: PCM substream
103 : : *
104 : : * This locks the PCM stream's spinlock or mutex depending on the nonatomic
105 : : * flag of the given substream. This also takes the global link rw lock
106 : : * (or rw sem), too, for avoiding the race with linked streams.
107 : : */
108 : 0 : void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
109 : : {
110 [ # # ]: 0 : snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
111 : 0 : }
112 : : EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
113 : :
114 : : /**
115 : : * snd_pcm_stream_lock - Unlock the PCM stream
116 : : * @substream: PCM substream
117 : : *
118 : : * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
119 : : */
120 : 0 : void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
121 : : {
122 [ # # ]: 0 : snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
123 : 0 : }
124 : : EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
125 : :
126 : : /**
127 : : * snd_pcm_stream_lock_irq - Lock the PCM stream
128 : : * @substream: PCM substream
129 : : *
130 : : * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
131 : : * IRQ (only when nonatomic is false). In nonatomic case, this is identical
132 : : * as snd_pcm_stream_lock().
133 : : */
134 : 0 : void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
135 : : {
136 : 0 : snd_pcm_group_lock_irq(&substream->self_group,
137 [ # # ]: 0 : substream->pcm->nonatomic);
138 : 0 : }
139 : : EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
140 : :
141 : : /**
142 : : * snd_pcm_stream_unlock_irq - Unlock the PCM stream
143 : : * @substream: PCM substream
144 : : *
145 : : * This is a counter-part of snd_pcm_stream_lock_irq().
146 : : */
147 : 0 : void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
148 : : {
149 : 0 : snd_pcm_group_unlock_irq(&substream->self_group,
150 [ # # ]: 0 : substream->pcm->nonatomic);
151 : 0 : }
152 : : EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
153 : :
154 : 0 : unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
155 : : {
156 : 0 : unsigned long flags = 0;
157 [ # # ]: 0 : if (substream->pcm->nonatomic)
158 : 0 : mutex_lock(&substream->self_group.mutex);
159 : : else
160 : 0 : spin_lock_irqsave(&substream->self_group.lock, flags);
161 : 0 : return flags;
162 : : }
163 : : EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
164 : :
165 : : /**
166 : : * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
167 : : * @substream: PCM substream
168 : : * @flags: irq flags
169 : : *
170 : : * This is a counter-part of snd_pcm_stream_lock_irqsave().
171 : : */
172 : 0 : void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
173 : : unsigned long flags)
174 : : {
175 [ # # ]: 0 : if (substream->pcm->nonatomic)
176 : 0 : mutex_unlock(&substream->self_group.mutex);
177 : : else
178 : 0 : spin_unlock_irqrestore(&substream->self_group.lock, flags);
179 : 0 : }
180 : : EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
181 : :
182 : : /* Run PCM ioctl ops */
183 : 0 : static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream,
184 : : unsigned cmd, void *arg)
185 : : {
186 [ # # ]: 0 : if (substream->ops->ioctl)
187 : 0 : return substream->ops->ioctl(substream, cmd, arg);
188 : : else
189 : 0 : return snd_pcm_lib_ioctl(substream, cmd, arg);
190 : : }
191 : :
192 : 0 : int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
193 : : {
194 : 0 : struct snd_pcm *pcm = substream->pcm;
195 : 0 : struct snd_pcm_str *pstr = substream->pstr;
196 : :
197 : 0 : memset(info, 0, sizeof(*info));
198 : 0 : info->card = pcm->card->number;
199 : 0 : info->device = pcm->device;
200 : 0 : info->stream = substream->stream;
201 : 0 : info->subdevice = substream->number;
202 : 0 : strlcpy(info->id, pcm->id, sizeof(info->id));
203 : 0 : strlcpy(info->name, pcm->name, sizeof(info->name));
204 : 0 : info->dev_class = pcm->dev_class;
205 : 0 : info->dev_subclass = pcm->dev_subclass;
206 : 0 : info->subdevices_count = pstr->substream_count;
207 : 0 : info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
208 : 0 : strlcpy(info->subname, substream->name, sizeof(info->subname));
209 : :
210 : 0 : return 0;
211 : : }
212 : :
213 : 0 : int snd_pcm_info_user(struct snd_pcm_substream *substream,
214 : : struct snd_pcm_info __user * _info)
215 : : {
216 : 0 : struct snd_pcm_info *info;
217 : 0 : int err;
218 : :
219 : 0 : info = kmalloc(sizeof(*info), GFP_KERNEL);
220 [ # # ]: 0 : if (! info)
221 : : return -ENOMEM;
222 : 0 : err = snd_pcm_info(substream, info);
223 [ # # ]: 0 : if (err >= 0) {
224 [ # # # # ]: 0 : if (copy_to_user(_info, info, sizeof(*info)))
225 : : err = -EFAULT;
226 : : }
227 : 0 : kfree(info);
228 : 0 : return err;
229 : : }
230 : :
231 : 0 : static bool hw_support_mmap(struct snd_pcm_substream *substream)
232 : : {
233 [ # # ]: 0 : if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
234 : : return false;
235 : :
236 [ # # ]: 0 : if (substream->ops->mmap ||
237 [ # # ]: 0 : (substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV &&
238 : : substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV_UC))
239 : : return true;
240 : :
241 : 0 : return dma_can_mmap(substream->dma_buffer.dev.dev);
242 : : }
243 : :
244 : : static int constrain_mask_params(struct snd_pcm_substream *substream,
245 : : struct snd_pcm_hw_params *params)
246 : : {
247 : : struct snd_pcm_hw_constraints *constrs =
248 : : &substream->runtime->hw_constraints;
249 : : struct snd_mask *m;
250 : : unsigned int k;
251 : : struct snd_mask old_mask;
252 : : int changed;
253 : :
254 : : for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
255 : : m = hw_param_mask(params, k);
256 : : if (snd_mask_empty(m))
257 : : return -EINVAL;
258 : :
259 : : /* This parameter is not requested to change by a caller. */
260 : : if (!(params->rmask & (1 << k)))
261 : : continue;
262 : :
263 : : if (trace_hw_mask_param_enabled())
264 : : old_mask = *m;
265 : :
266 : : changed = snd_mask_refine(m, constrs_mask(constrs, k));
267 : : if (changed < 0)
268 : : return changed;
269 : : if (changed == 0)
270 : : continue;
271 : :
272 : : /* Set corresponding flag so that the caller gets it. */
273 : : trace_hw_mask_param(substream, k, 0, &old_mask, m);
274 : : params->cmask |= 1 << k;
275 : : }
276 : :
277 : : return 0;
278 : : }
279 : :
280 : : static int constrain_interval_params(struct snd_pcm_substream *substream,
281 : : struct snd_pcm_hw_params *params)
282 : : {
283 : : struct snd_pcm_hw_constraints *constrs =
284 : : &substream->runtime->hw_constraints;
285 : : struct snd_interval *i;
286 : : unsigned int k;
287 : : struct snd_interval old_interval;
288 : : int changed;
289 : :
290 : : for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
291 : : i = hw_param_interval(params, k);
292 : : if (snd_interval_empty(i))
293 : : return -EINVAL;
294 : :
295 : : /* This parameter is not requested to change by a caller. */
296 : : if (!(params->rmask & (1 << k)))
297 : : continue;
298 : :
299 : : if (trace_hw_interval_param_enabled())
300 : : old_interval = *i;
301 : :
302 : : changed = snd_interval_refine(i, constrs_interval(constrs, k));
303 : : if (changed < 0)
304 : : return changed;
305 : : if (changed == 0)
306 : : continue;
307 : :
308 : : /* Set corresponding flag so that the caller gets it. */
309 : : trace_hw_interval_param(substream, k, 0, &old_interval, i);
310 : : params->cmask |= 1 << k;
311 : : }
312 : :
313 : : return 0;
314 : : }
315 : :
316 : : static int constrain_params_by_rules(struct snd_pcm_substream *substream,
317 : : struct snd_pcm_hw_params *params)
318 : : {
319 : : struct snd_pcm_hw_constraints *constrs =
320 : : &substream->runtime->hw_constraints;
321 : : unsigned int k;
322 : : unsigned int *rstamps;
323 : : unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
324 : : unsigned int stamp;
325 : : struct snd_pcm_hw_rule *r;
326 : : unsigned int d;
327 : : struct snd_mask old_mask;
328 : : struct snd_interval old_interval;
329 : : bool again;
330 : : int changed, err = 0;
331 : :
332 : : /*
333 : : * Each application of rule has own sequence number.
334 : : *
335 : : * Each member of 'rstamps' array represents the sequence number of
336 : : * recent application of corresponding rule.
337 : : */
338 : : rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
339 : : if (!rstamps)
340 : : return -ENOMEM;
341 : :
342 : : /*
343 : : * Each member of 'vstamps' array represents the sequence number of
344 : : * recent application of rule in which corresponding parameters were
345 : : * changed.
346 : : *
347 : : * In initial state, elements corresponding to parameters requested by
348 : : * a caller is 1. For unrequested parameters, corresponding members
349 : : * have 0 so that the parameters are never changed anymore.
350 : : */
351 : : for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
352 : : vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
353 : :
354 : : /* Due to the above design, actual sequence number starts at 2. */
355 : : stamp = 2;
356 : : retry:
357 : : /* Apply all rules in order. */
358 : : again = false;
359 : : for (k = 0; k < constrs->rules_num; k++) {
360 : : r = &constrs->rules[k];
361 : :
362 : : /*
363 : : * Check condition bits of this rule. When the rule has
364 : : * some condition bits, parameter without the bits is
365 : : * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
366 : : * is an example of the condition bits.
367 : : */
368 : : if (r->cond && !(r->cond & params->flags))
369 : : continue;
370 : :
371 : : /*
372 : : * The 'deps' array includes maximum three dependencies
373 : : * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
374 : : * member of this array is a sentinel and should be
375 : : * negative value.
376 : : *
377 : : * This rule should be processed in this time when dependent
378 : : * parameters were changed at former applications of the other
379 : : * rules.
380 : : */
381 : : for (d = 0; r->deps[d] >= 0; d++) {
382 : : if (vstamps[r->deps[d]] > rstamps[k])
383 : : break;
384 : : }
385 : : if (r->deps[d] < 0)
386 : : continue;
387 : :
388 : : if (trace_hw_mask_param_enabled()) {
389 : : if (hw_is_mask(r->var))
390 : : old_mask = *hw_param_mask(params, r->var);
391 : : }
392 : : if (trace_hw_interval_param_enabled()) {
393 : : if (hw_is_interval(r->var))
394 : : old_interval = *hw_param_interval(params, r->var);
395 : : }
396 : :
397 : : changed = r->func(params, r);
398 : : if (changed < 0) {
399 : : err = changed;
400 : : goto out;
401 : : }
402 : :
403 : : /*
404 : : * When the parameter is changed, notify it to the caller
405 : : * by corresponding returned bit, then preparing for next
406 : : * iteration.
407 : : */
408 : : if (changed && r->var >= 0) {
409 : : if (hw_is_mask(r->var)) {
410 : : trace_hw_mask_param(substream, r->var,
411 : : k + 1, &old_mask,
412 : : hw_param_mask(params, r->var));
413 : : }
414 : : if (hw_is_interval(r->var)) {
415 : : trace_hw_interval_param(substream, r->var,
416 : : k + 1, &old_interval,
417 : : hw_param_interval(params, r->var));
418 : : }
419 : :
420 : : params->cmask |= (1 << r->var);
421 : : vstamps[r->var] = stamp;
422 : : again = true;
423 : : }
424 : :
425 : : rstamps[k] = stamp++;
426 : : }
427 : :
428 : : /* Iterate to evaluate all rules till no parameters are changed. */
429 : : if (again)
430 : : goto retry;
431 : :
432 : : out:
433 : : kfree(rstamps);
434 : : return err;
435 : : }
436 : :
437 : 0 : static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
438 : : struct snd_pcm_hw_params *params)
439 : : {
440 : 0 : const struct snd_interval *i;
441 : 0 : const struct snd_mask *m;
442 : 0 : int err;
443 : :
444 [ # # ]: 0 : if (!params->msbits) {
445 [ # # ]: 0 : i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
446 [ # # ]: 0 : if (snd_interval_single(i))
447 [ # # ]: 0 : params->msbits = snd_interval_value(i);
448 : : }
449 : :
450 [ # # ]: 0 : if (!params->rate_den) {
451 [ # # ]: 0 : i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
452 [ # # ]: 0 : if (snd_interval_single(i)) {
453 [ # # ]: 0 : params->rate_num = snd_interval_value(i);
454 : 0 : params->rate_den = 1;
455 : : }
456 : : }
457 : :
458 [ # # ]: 0 : if (!params->fifo_size) {
459 : : m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
460 : : i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
461 [ # # ]: 0 : if (snd_mask_single(m) && snd_interval_single(i)) {
462 : 0 : err = snd_pcm_ops_ioctl(substream,
463 : : SNDRV_PCM_IOCTL1_FIFO_SIZE,
464 : : params);
465 [ # # ]: 0 : if (err < 0)
466 : : return err;
467 : : }
468 : : }
469 : :
470 [ # # ]: 0 : if (!params->info) {
471 : 0 : params->info = substream->runtime->hw.info;
472 : 0 : params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
473 : : SNDRV_PCM_INFO_DRAIN_TRIGGER);
474 [ # # ]: 0 : if (!hw_support_mmap(substream))
475 : 0 : params->info &= ~(SNDRV_PCM_INFO_MMAP |
476 : : SNDRV_PCM_INFO_MMAP_VALID);
477 : : }
478 : :
479 : : return 0;
480 : : }
481 : :
482 : 0 : int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
483 : : struct snd_pcm_hw_params *params)
484 : : {
485 : 0 : int err;
486 : :
487 : 0 : params->info = 0;
488 : 0 : params->fifo_size = 0;
489 [ # # ]: 0 : if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
490 : 0 : params->msbits = 0;
491 [ # # ]: 0 : if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
492 : 0 : params->rate_num = 0;
493 : 0 : params->rate_den = 0;
494 : : }
495 : :
496 : 0 : err = constrain_mask_params(substream, params);
497 [ # # ]: 0 : if (err < 0)
498 : : return err;
499 : :
500 : 0 : err = constrain_interval_params(substream, params);
501 [ # # ]: 0 : if (err < 0)
502 : : return err;
503 : :
504 : 0 : err = constrain_params_by_rules(substream, params);
505 [ # # ]: 0 : if (err < 0)
506 : : return err;
507 : :
508 : 0 : params->rmask = 0;
509 : :
510 : 0 : return 0;
511 : : }
512 : : EXPORT_SYMBOL(snd_pcm_hw_refine);
513 : :
514 : 0 : static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
515 : : struct snd_pcm_hw_params __user * _params)
516 : : {
517 : 0 : struct snd_pcm_hw_params *params;
518 : 0 : int err;
519 : :
520 : 0 : params = memdup_user(_params, sizeof(*params));
521 [ # # ]: 0 : if (IS_ERR(params))
522 : 0 : return PTR_ERR(params);
523 : :
524 : 0 : err = snd_pcm_hw_refine(substream, params);
525 [ # # ]: 0 : if (err < 0)
526 : 0 : goto end;
527 : :
528 : 0 : err = fixup_unreferenced_params(substream, params);
529 [ # # ]: 0 : if (err < 0)
530 : 0 : goto end;
531 : :
532 [ # # # # ]: 0 : if (copy_to_user(_params, params, sizeof(*params)))
533 : : err = -EFAULT;
534 : 0 : end:
535 : 0 : kfree(params);
536 : 0 : return err;
537 : : }
538 : :
539 : 0 : static int period_to_usecs(struct snd_pcm_runtime *runtime)
540 : : {
541 : 0 : int usecs;
542 : :
543 : 0 : if (! runtime->rate)
544 : : return -1; /* invalid */
545 : :
546 : : /* take 75% of period time as the deadline */
547 : 0 : usecs = (750000 / runtime->rate) * runtime->period_size;
548 : 0 : usecs += ((750000 % runtime->rate) * runtime->period_size) /
549 : 0 : runtime->rate;
550 : :
551 : 0 : return usecs;
552 : : }
553 : :
554 : 0 : static void snd_pcm_set_state(struct snd_pcm_substream *substream,
555 : : snd_pcm_state_t state)
556 : : {
557 : 0 : snd_pcm_stream_lock_irq(substream);
558 [ # # ]: 0 : if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
559 : 0 : substream->runtime->status->state = state;
560 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
561 : 0 : }
562 : :
563 : 0 : static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
564 : : int event)
565 : : {
566 : : #ifdef CONFIG_SND_PCM_TIMER
567 : 0 : if (substream->timer)
568 : 0 : snd_timer_notify(substream->timer, event,
569 : : &substream->runtime->trigger_tstamp);
570 : : #endif
571 : : }
572 : :
573 : 0 : static void snd_pcm_sync_stop(struct snd_pcm_substream *substream)
574 : : {
575 [ # # ]: 0 : if (substream->runtime->stop_operating) {
576 : 0 : substream->runtime->stop_operating = false;
577 [ # # ]: 0 : if (substream->ops->sync_stop)
578 : 0 : substream->ops->sync_stop(substream);
579 [ # # ]: 0 : else if (substream->pcm->card->sync_irq > 0)
580 : 0 : synchronize_irq(substream->pcm->card->sync_irq);
581 : : }
582 : 0 : }
583 : :
584 : : /**
585 : : * snd_pcm_hw_param_choose - choose a configuration defined by @params
586 : : * @pcm: PCM instance
587 : : * @params: the hw_params instance
588 : : *
589 : : * Choose one configuration from configuration space defined by @params.
590 : : * The configuration chosen is that obtained fixing in this order:
591 : : * first access, first format, first subformat, min channels,
592 : : * min rate, min period time, max buffer size, min tick time
593 : : *
594 : : * Return: Zero if successful, or a negative error code on failure.
595 : : */
596 : 0 : static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
597 : : struct snd_pcm_hw_params *params)
598 : : {
599 : 0 : static const int vars[] = {
600 : : SNDRV_PCM_HW_PARAM_ACCESS,
601 : : SNDRV_PCM_HW_PARAM_FORMAT,
602 : : SNDRV_PCM_HW_PARAM_SUBFORMAT,
603 : : SNDRV_PCM_HW_PARAM_CHANNELS,
604 : : SNDRV_PCM_HW_PARAM_RATE,
605 : : SNDRV_PCM_HW_PARAM_PERIOD_TIME,
606 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
607 : : SNDRV_PCM_HW_PARAM_TICK_TIME,
608 : : -1
609 : : };
610 : 0 : const int *v;
611 : 0 : struct snd_mask old_mask;
612 : 0 : struct snd_interval old_interval;
613 : 0 : int changed;
614 : :
615 [ # # ]: 0 : for (v = vars; *v != -1; v++) {
616 : : /* Keep old parameter to trace. */
617 : 0 : if (trace_hw_mask_param_enabled()) {
618 : : if (hw_is_mask(*v))
619 : : old_mask = *hw_param_mask(params, *v);
620 : : }
621 : 0 : if (trace_hw_interval_param_enabled()) {
622 : : if (hw_is_interval(*v))
623 : : old_interval = *hw_param_interval(params, *v);
624 : : }
625 [ # # ]: 0 : if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
626 : 0 : changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
627 : : else
628 : 0 : changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
629 [ # # ]: 0 : if (changed < 0)
630 : 0 : return changed;
631 : 0 : if (changed == 0)
632 : : continue;
633 : :
634 : : /* Trace the changed parameter. */
635 : 0 : if (hw_is_mask(*v)) {
636 : : trace_hw_mask_param(pcm, *v, 0, &old_mask,
637 : 0 : hw_param_mask(params, *v));
638 : : }
639 : 0 : if (hw_is_interval(*v)) {
640 : : trace_hw_interval_param(pcm, *v, 0, &old_interval,
641 : 0 : hw_param_interval(params, *v));
642 : : }
643 : : }
644 : :
645 : : return 0;
646 : : }
647 : :
648 : 0 : static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
649 : : struct snd_pcm_hw_params *params)
650 : : {
651 : 0 : struct snd_pcm_runtime *runtime;
652 : 0 : int err, usecs;
653 : 0 : unsigned int bits;
654 : 0 : snd_pcm_uframes_t frames;
655 : :
656 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
657 : : return -ENXIO;
658 : 0 : runtime = substream->runtime;
659 : 0 : snd_pcm_stream_lock_irq(substream);
660 [ # # ]: 0 : switch (runtime->status->state) {
661 : : case SNDRV_PCM_STATE_OPEN:
662 : : case SNDRV_PCM_STATE_SETUP:
663 : : case SNDRV_PCM_STATE_PREPARED:
664 : 0 : break;
665 : : default:
666 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
667 : : return -EBADFD;
668 : : }
669 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
670 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
671 : : if (!substream->oss.oss)
672 : : #endif
673 [ # # ]: 0 : if (atomic_read(&substream->mmap_count))
674 : : return -EBADFD;
675 : :
676 : 0 : snd_pcm_sync_stop(substream);
677 : :
678 : 0 : params->rmask = ~0U;
679 : 0 : err = snd_pcm_hw_refine(substream, params);
680 [ # # ]: 0 : if (err < 0)
681 : 0 : goto _error;
682 : :
683 : 0 : err = snd_pcm_hw_params_choose(substream, params);
684 [ # # ]: 0 : if (err < 0)
685 : 0 : goto _error;
686 : :
687 : 0 : err = fixup_unreferenced_params(substream, params);
688 [ # # ]: 0 : if (err < 0)
689 : 0 : goto _error;
690 : :
691 [ # # ]: 0 : if (substream->managed_buffer_alloc) {
692 : 0 : err = snd_pcm_lib_malloc_pages(substream,
693 : : params_buffer_bytes(params));
694 [ # # ]: 0 : if (err < 0)
695 : 0 : goto _error;
696 : 0 : runtime->buffer_changed = err > 0;
697 : : }
698 : :
699 [ # # ]: 0 : if (substream->ops->hw_params != NULL) {
700 : 0 : err = substream->ops->hw_params(substream, params);
701 [ # # ]: 0 : if (err < 0)
702 : 0 : goto _error;
703 : : }
704 : :
705 : 0 : runtime->access = params_access(params);
706 : 0 : runtime->format = params_format(params);
707 : 0 : runtime->subformat = params_subformat(params);
708 [ # # ]: 0 : runtime->channels = params_channels(params);
709 [ # # ]: 0 : runtime->rate = params_rate(params);
710 [ # # ]: 0 : runtime->period_size = params_period_size(params);
711 [ # # ]: 0 : runtime->periods = params_periods(params);
712 [ # # ]: 0 : runtime->buffer_size = params_buffer_size(params);
713 : 0 : runtime->info = params->info;
714 : 0 : runtime->rate_num = params->rate_num;
715 : 0 : runtime->rate_den = params->rate_den;
716 : 0 : runtime->no_period_wakeup =
717 [ # # ]: 0 : (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
718 [ # # ]: 0 : (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
719 : :
720 : 0 : bits = snd_pcm_format_physical_width(runtime->format);
721 : 0 : runtime->sample_bits = bits;
722 : 0 : bits *= runtime->channels;
723 : 0 : runtime->frame_bits = bits;
724 : 0 : frames = 1;
725 [ # # ]: 0 : while (bits % 8 != 0) {
726 : 0 : bits *= 2;
727 : 0 : frames *= 2;
728 : : }
729 : 0 : runtime->byte_align = bits / 8;
730 : 0 : runtime->min_align = frames;
731 : :
732 : : /* Default sw params */
733 : 0 : runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
734 : 0 : runtime->period_step = 1;
735 : 0 : runtime->control->avail_min = runtime->period_size;
736 : 0 : runtime->start_threshold = 1;
737 : 0 : runtime->stop_threshold = runtime->buffer_size;
738 : 0 : runtime->silence_threshold = 0;
739 : 0 : runtime->silence_size = 0;
740 : 0 : runtime->boundary = runtime->buffer_size;
741 [ # # ]: 0 : while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
742 : 0 : runtime->boundary *= 2;
743 : :
744 : : /* clear the buffer for avoiding possible kernel info leaks */
745 [ # # # # ]: 0 : if (runtime->dma_area && !substream->ops->copy_user)
746 : 0 : memset(runtime->dma_area, 0, runtime->dma_bytes);
747 : :
748 : 0 : snd_pcm_timer_resolution_change(substream);
749 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
750 : :
751 [ # # ]: 0 : if (pm_qos_request_active(&substream->latency_pm_qos_req))
752 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
753 [ # # # # ]: 0 : if ((usecs = period_to_usecs(runtime)) >= 0)
754 : 0 : pm_qos_add_request(&substream->latency_pm_qos_req,
755 : : PM_QOS_CPU_DMA_LATENCY, usecs);
756 : : return 0;
757 : 0 : _error:
758 : : /* hardware might be unusable from this time,
759 : : so we force application to retry to set
760 : : the correct hardware parameter settings */
761 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
762 [ # # ]: 0 : if (substream->ops->hw_free != NULL)
763 : 0 : substream->ops->hw_free(substream);
764 [ # # ]: 0 : if (substream->managed_buffer_alloc)
765 : 0 : snd_pcm_lib_free_pages(substream);
766 : : return err;
767 : : }
768 : :
769 : 0 : static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
770 : : struct snd_pcm_hw_params __user * _params)
771 : : {
772 : 0 : struct snd_pcm_hw_params *params;
773 : 0 : int err;
774 : :
775 : 0 : params = memdup_user(_params, sizeof(*params));
776 [ # # ]: 0 : if (IS_ERR(params))
777 : 0 : return PTR_ERR(params);
778 : :
779 : 0 : err = snd_pcm_hw_params(substream, params);
780 [ # # ]: 0 : if (err < 0)
781 : 0 : goto end;
782 : :
783 [ # # # # ]: 0 : if (copy_to_user(_params, params, sizeof(*params)))
784 : : err = -EFAULT;
785 : 0 : end:
786 : 0 : kfree(params);
787 : 0 : return err;
788 : : }
789 : :
790 : 0 : static int do_hw_free(struct snd_pcm_substream *substream)
791 : : {
792 : 0 : int result = 0;
793 : :
794 : 0 : snd_pcm_sync_stop(substream);
795 [ # # ]: 0 : if (substream->ops->hw_free)
796 : 0 : result = substream->ops->hw_free(substream);
797 [ # # ]: 0 : if (substream->managed_buffer_alloc)
798 : 0 : snd_pcm_lib_free_pages(substream);
799 : 0 : return result;
800 : : }
801 : :
802 : 0 : static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
803 : : {
804 : 0 : struct snd_pcm_runtime *runtime;
805 : 0 : int result;
806 : :
807 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
808 : : return -ENXIO;
809 : 0 : runtime = substream->runtime;
810 : 0 : snd_pcm_stream_lock_irq(substream);
811 [ # # ]: 0 : switch (runtime->status->state) {
812 : : case SNDRV_PCM_STATE_SETUP:
813 : : case SNDRV_PCM_STATE_PREPARED:
814 : 0 : break;
815 : : default:
816 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
817 : : return -EBADFD;
818 : : }
819 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
820 [ # # ]: 0 : if (atomic_read(&substream->mmap_count))
821 : : return -EBADFD;
822 : 0 : result = do_hw_free(substream);
823 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
824 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
825 : 0 : return result;
826 : : }
827 : :
828 : 0 : static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
829 : : struct snd_pcm_sw_params *params)
830 : : {
831 : 0 : struct snd_pcm_runtime *runtime;
832 : 0 : int err;
833 : :
834 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
835 : : return -ENXIO;
836 : 0 : runtime = substream->runtime;
837 : 0 : snd_pcm_stream_lock_irq(substream);
838 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
839 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
840 : 0 : return -EBADFD;
841 : : }
842 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
843 : :
844 [ # # ]: 0 : if (params->tstamp_mode < 0 ||
845 : : params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
846 : : return -EINVAL;
847 [ # # ]: 0 : if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
848 [ # # ]: 0 : params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
849 : : return -EINVAL;
850 [ # # ]: 0 : if (params->avail_min == 0)
851 : : return -EINVAL;
852 [ # # ]: 0 : if (params->silence_size >= runtime->boundary) {
853 [ # # ]: 0 : if (params->silence_threshold != 0)
854 : : return -EINVAL;
855 : : } else {
856 [ # # ]: 0 : if (params->silence_size > params->silence_threshold)
857 : : return -EINVAL;
858 [ # # ]: 0 : if (params->silence_threshold > runtime->buffer_size)
859 : : return -EINVAL;
860 : : }
861 : 0 : err = 0;
862 : 0 : snd_pcm_stream_lock_irq(substream);
863 : 0 : runtime->tstamp_mode = params->tstamp_mode;
864 [ # # ]: 0 : if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
865 : 0 : runtime->tstamp_type = params->tstamp_type;
866 : 0 : runtime->period_step = params->period_step;
867 : 0 : runtime->control->avail_min = params->avail_min;
868 : 0 : runtime->start_threshold = params->start_threshold;
869 : 0 : runtime->stop_threshold = params->stop_threshold;
870 : 0 : runtime->silence_threshold = params->silence_threshold;
871 : 0 : runtime->silence_size = params->silence_size;
872 : 0 : params->boundary = runtime->boundary;
873 [ # # ]: 0 : if (snd_pcm_running(substream)) {
874 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
875 [ # # ]: 0 : runtime->silence_size > 0)
876 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
877 : 0 : err = snd_pcm_update_state(substream, runtime);
878 : : }
879 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
880 : : return err;
881 : : }
882 : :
883 : 0 : static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
884 : : struct snd_pcm_sw_params __user * _params)
885 : : {
886 : 0 : struct snd_pcm_sw_params params;
887 : 0 : int err;
888 [ # # ]: 0 : if (copy_from_user(¶ms, _params, sizeof(params)))
889 : : return -EFAULT;
890 : 0 : err = snd_pcm_sw_params(substream, ¶ms);
891 [ # # ]: 0 : if (copy_to_user(_params, ¶ms, sizeof(params)))
892 : 0 : return -EFAULT;
893 : : return err;
894 : : }
895 : :
896 : : static inline snd_pcm_uframes_t
897 : : snd_pcm_calc_delay(struct snd_pcm_substream *substream)
898 : : {
899 : : snd_pcm_uframes_t delay;
900 : :
901 : : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
902 : : delay = snd_pcm_playback_hw_avail(substream->runtime);
903 : : else
904 : : delay = snd_pcm_capture_avail(substream->runtime);
905 : : return delay + substream->runtime->delay;
906 : : }
907 : :
908 : 0 : int snd_pcm_status64(struct snd_pcm_substream *substream,
909 : : struct snd_pcm_status64 *status)
910 : : {
911 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
912 : :
913 : 0 : snd_pcm_stream_lock_irq(substream);
914 : :
915 [ # # ]: 0 : snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
916 : : &runtime->audio_tstamp_config);
917 : :
918 : : /* backwards compatible behavior */
919 [ # # ]: 0 : if (runtime->audio_tstamp_config.type_requested ==
920 : : SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
921 [ # # ]: 0 : if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
922 : 0 : runtime->audio_tstamp_config.type_requested =
923 : : SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
924 : : else
925 : 0 : runtime->audio_tstamp_config.type_requested =
926 : : SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
927 : 0 : runtime->audio_tstamp_report.valid = 0;
928 : : } else
929 : 0 : runtime->audio_tstamp_report.valid = 1;
930 : :
931 : 0 : status->state = runtime->status->state;
932 : 0 : status->suspended_state = runtime->status->suspended_state;
933 [ # # ]: 0 : if (status->state == SNDRV_PCM_STATE_OPEN)
934 : 0 : goto _end;
935 : 0 : status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
936 : 0 : status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
937 [ # # ]: 0 : if (snd_pcm_running(substream)) {
938 : 0 : snd_pcm_update_hw_ptr(substream);
939 [ # # ]: 0 : if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
940 : 0 : status->tstamp_sec = runtime->status->tstamp.tv_sec;
941 : 0 : status->tstamp_nsec =
942 : 0 : runtime->status->tstamp.tv_nsec;
943 : 0 : status->driver_tstamp_sec =
944 : 0 : runtime->driver_tstamp.tv_sec;
945 : 0 : status->driver_tstamp_nsec =
946 : 0 : runtime->driver_tstamp.tv_nsec;
947 : 0 : status->audio_tstamp_sec =
948 : 0 : runtime->status->audio_tstamp.tv_sec;
949 : 0 : status->audio_tstamp_nsec =
950 : 0 : runtime->status->audio_tstamp.tv_nsec;
951 [ # # ]: 0 : if (runtime->audio_tstamp_report.valid == 1)
952 : : /* backwards compatibility, no report provided in COMPAT mode */
953 : 0 : snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
954 : : &status->audio_tstamp_accuracy,
955 : : &runtime->audio_tstamp_report);
956 : :
957 : 0 : goto _tstamp_end;
958 : : }
959 : : } else {
960 : : /* get tstamp only in fallback mode and only if enabled */
961 [ # # ]: 0 : if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
962 : 0 : struct timespec64 tstamp;
963 : :
964 : 0 : snd_pcm_gettime(runtime, &tstamp);
965 : 0 : status->tstamp_sec = tstamp.tv_sec;
966 : 0 : status->tstamp_nsec = tstamp.tv_nsec;
967 : : }
968 : : }
969 : 0 : _tstamp_end:
970 : 0 : status->appl_ptr = runtime->control->appl_ptr;
971 : 0 : status->hw_ptr = runtime->status->hw_ptr;
972 : 0 : status->avail = snd_pcm_avail(substream);
973 [ # # ]: 0 : status->delay = snd_pcm_running(substream) ?
974 : 0 : snd_pcm_calc_delay(substream) : 0;
975 : 0 : status->avail_max = runtime->avail_max;
976 : 0 : status->overrange = runtime->overrange;
977 : 0 : runtime->avail_max = 0;
978 : 0 : runtime->overrange = 0;
979 : 0 : _end:
980 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
981 : 0 : return 0;
982 : : }
983 : :
984 : 0 : static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
985 : : struct snd_pcm_status64 __user * _status,
986 : : bool ext)
987 : : {
988 : 0 : struct snd_pcm_status64 status;
989 : 0 : int res;
990 : :
991 : 0 : memset(&status, 0, sizeof(status));
992 : : /*
993 : : * with extension, parameters are read/write,
994 : : * get audio_tstamp_data from user,
995 : : * ignore rest of status structure
996 : : */
997 [ # # # # ]: 0 : if (ext && get_user(status.audio_tstamp_data,
998 : : (u32 __user *)(&_status->audio_tstamp_data)))
999 : : return -EFAULT;
1000 : 0 : res = snd_pcm_status64(substream, &status);
1001 [ # # ]: 0 : if (res < 0)
1002 : : return res;
1003 [ # # ]: 0 : if (copy_to_user(_status, &status, sizeof(status)))
1004 : 0 : return -EFAULT;
1005 : : return 0;
1006 : : }
1007 : :
1008 : 0 : static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
1009 : : struct snd_pcm_status32 __user * _status,
1010 : : bool ext)
1011 : : {
1012 : 0 : struct snd_pcm_status64 status64;
1013 : 0 : struct snd_pcm_status32 status32;
1014 : 0 : int res;
1015 : :
1016 : 0 : memset(&status64, 0, sizeof(status64));
1017 : 0 : memset(&status32, 0, sizeof(status32));
1018 : : /*
1019 : : * with extension, parameters are read/write,
1020 : : * get audio_tstamp_data from user,
1021 : : * ignore rest of status structure
1022 : : */
1023 [ # # # # ]: 0 : if (ext && get_user(status64.audio_tstamp_data,
1024 : : (u32 __user *)(&_status->audio_tstamp_data)))
1025 : : return -EFAULT;
1026 : 0 : res = snd_pcm_status64(substream, &status64);
1027 [ # # ]: 0 : if (res < 0)
1028 : : return res;
1029 : :
1030 : 0 : status32 = (struct snd_pcm_status32) {
1031 : 0 : .state = status64.state,
1032 : 0 : .trigger_tstamp_sec = status64.trigger_tstamp_sec,
1033 : 0 : .trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
1034 : 0 : .tstamp_sec = status64.tstamp_sec,
1035 : 0 : .tstamp_nsec = status64.tstamp_nsec,
1036 : 0 : .appl_ptr = status64.appl_ptr,
1037 : 0 : .hw_ptr = status64.hw_ptr,
1038 : 0 : .delay = status64.delay,
1039 : 0 : .avail = status64.avail,
1040 : 0 : .avail_max = status64.avail_max,
1041 : 0 : .overrange = status64.overrange,
1042 : 0 : .suspended_state = status64.suspended_state,
1043 : 0 : .audio_tstamp_data = status64.audio_tstamp_data,
1044 : 0 : .audio_tstamp_sec = status64.audio_tstamp_sec,
1045 : 0 : .audio_tstamp_nsec = status64.audio_tstamp_nsec,
1046 : : .driver_tstamp_sec = status64.audio_tstamp_sec,
1047 : : .driver_tstamp_nsec = status64.audio_tstamp_nsec,
1048 : 0 : .audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
1049 : : };
1050 : :
1051 [ # # ]: 0 : if (copy_to_user(_status, &status32, sizeof(status32)))
1052 : 0 : return -EFAULT;
1053 : :
1054 : : return 0;
1055 : : }
1056 : :
1057 : 0 : static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
1058 : : struct snd_pcm_channel_info * info)
1059 : : {
1060 : 0 : struct snd_pcm_runtime *runtime;
1061 : 0 : unsigned int channel;
1062 : :
1063 : 0 : channel = info->channel;
1064 : 0 : runtime = substream->runtime;
1065 : 0 : snd_pcm_stream_lock_irq(substream);
1066 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
1067 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
1068 : 0 : return -EBADFD;
1069 : : }
1070 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
1071 [ # # ]: 0 : if (channel >= runtime->channels)
1072 : : return -EINVAL;
1073 : 0 : memset(info, 0, sizeof(*info));
1074 : 0 : info->channel = channel;
1075 : 0 : return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1076 : : }
1077 : :
1078 : 0 : static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1079 : : struct snd_pcm_channel_info __user * _info)
1080 : : {
1081 : 0 : struct snd_pcm_channel_info info;
1082 : 0 : int res;
1083 : :
1084 [ # # ]: 0 : if (copy_from_user(&info, _info, sizeof(info)))
1085 : : return -EFAULT;
1086 : 0 : res = snd_pcm_channel_info(substream, &info);
1087 [ # # ]: 0 : if (res < 0)
1088 : : return res;
1089 [ # # ]: 0 : if (copy_to_user(_info, &info, sizeof(info)))
1090 : 0 : return -EFAULT;
1091 : : return 0;
1092 : : }
1093 : :
1094 : 0 : static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1095 : : {
1096 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1097 [ # # ]: 0 : if (runtime->trigger_master == NULL)
1098 : : return;
1099 [ # # ]: 0 : if (runtime->trigger_master == substream) {
1100 [ # # ]: 0 : if (!runtime->trigger_tstamp_latched)
1101 : 0 : snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1102 : : } else {
1103 : 0 : snd_pcm_trigger_tstamp(runtime->trigger_master);
1104 : 0 : runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1105 : : }
1106 : 0 : runtime->trigger_master = NULL;
1107 : : }
1108 : :
1109 : : #define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0
1110 : :
1111 : : struct action_ops {
1112 : : int (*pre_action)(struct snd_pcm_substream *substream,
1113 : : snd_pcm_state_t state);
1114 : : int (*do_action)(struct snd_pcm_substream *substream,
1115 : : snd_pcm_state_t state);
1116 : : void (*undo_action)(struct snd_pcm_substream *substream,
1117 : : snd_pcm_state_t state);
1118 : : void (*post_action)(struct snd_pcm_substream *substream,
1119 : : snd_pcm_state_t state);
1120 : : };
1121 : :
1122 : : /*
1123 : : * this functions is core for handling of linked stream
1124 : : * Note: the stream state might be changed also on failure
1125 : : * Note2: call with calling stream lock + link lock
1126 : : */
1127 : 0 : static int snd_pcm_action_group(const struct action_ops *ops,
1128 : : struct snd_pcm_substream *substream,
1129 : : snd_pcm_state_t state,
1130 : : bool do_lock)
1131 : : {
1132 : 0 : struct snd_pcm_substream *s = NULL;
1133 : 0 : struct snd_pcm_substream *s1;
1134 : 0 : int res = 0, depth = 1;
1135 : :
1136 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
1137 [ # # ]: 0 : if (do_lock && s != substream) {
1138 [ # # ]: 0 : if (s->pcm->nonatomic)
1139 : 0 : mutex_lock_nested(&s->self_group.mutex, depth);
1140 : : else
1141 : 0 : spin_lock_nested(&s->self_group.lock, depth);
1142 : 0 : depth++;
1143 : : }
1144 : 0 : res = ops->pre_action(s, state);
1145 [ # # ]: 0 : if (res < 0)
1146 : 0 : goto _unlock;
1147 : : }
1148 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
1149 : 0 : res = ops->do_action(s, state);
1150 [ # # ]: 0 : if (res < 0) {
1151 [ # # ]: 0 : if (ops->undo_action) {
1152 [ # # ]: 0 : snd_pcm_group_for_each_entry(s1, substream) {
1153 [ # # ]: 0 : if (s1 == s) /* failed stream */
1154 : : break;
1155 : 0 : ops->undo_action(s1, state);
1156 : : }
1157 : : }
1158 : 0 : s = NULL; /* unlock all */
1159 : 0 : goto _unlock;
1160 : : }
1161 : : }
1162 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
1163 : 0 : ops->post_action(s, state);
1164 : : }
1165 : 0 : _unlock:
1166 [ # # ]: 0 : if (do_lock) {
1167 : : /* unlock streams */
1168 [ # # ]: 0 : snd_pcm_group_for_each_entry(s1, substream) {
1169 [ # # ]: 0 : if (s1 != substream) {
1170 [ # # ]: 0 : if (s1->pcm->nonatomic)
1171 : 0 : mutex_unlock(&s1->self_group.mutex);
1172 : : else
1173 : 0 : spin_unlock(&s1->self_group.lock);
1174 : : }
1175 [ # # ]: 0 : if (s1 == s) /* end */
1176 : : break;
1177 : : }
1178 : : }
1179 : 0 : return res;
1180 : : }
1181 : :
1182 : : /*
1183 : : * Note: call with stream lock
1184 : : */
1185 : 0 : static int snd_pcm_action_single(const struct action_ops *ops,
1186 : : struct snd_pcm_substream *substream,
1187 : : snd_pcm_state_t state)
1188 : : {
1189 : 0 : int res;
1190 : :
1191 : 0 : res = ops->pre_action(substream, state);
1192 [ # # ]: 0 : if (res < 0)
1193 : : return res;
1194 : 0 : res = ops->do_action(substream, state);
1195 [ # # ]: 0 : if (res == 0)
1196 : 0 : ops->post_action(substream, state);
1197 [ # # ]: 0 : else if (ops->undo_action)
1198 : 0 : ops->undo_action(substream, state);
1199 : : return res;
1200 : : }
1201 : :
1202 : 0 : static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1203 : : struct snd_pcm_group *new_group)
1204 : : {
1205 : 0 : substream->group = new_group;
1206 : 0 : list_move(&substream->link_list, &new_group->substreams);
1207 : : }
1208 : :
1209 : : /*
1210 : : * Unref and unlock the group, but keep the stream lock;
1211 : : * when the group becomes empty and no longer referred, destroy itself
1212 : : */
1213 : : static void snd_pcm_group_unref(struct snd_pcm_group *group,
1214 : : struct snd_pcm_substream *substream)
1215 : : {
1216 : : bool do_free;
1217 : :
1218 : : if (!group)
1219 : : return;
1220 : : do_free = refcount_dec_and_test(&group->refs);
1221 : : snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1222 : : if (do_free)
1223 : : kfree(group);
1224 : : }
1225 : :
1226 : : /*
1227 : : * Lock the group inside a stream lock and reference it;
1228 : : * return the locked group object, or NULL if not linked
1229 : : */
1230 : : static struct snd_pcm_group *
1231 : 0 : snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1232 : : {
1233 : 0 : bool nonatomic = substream->pcm->nonatomic;
1234 : 0 : struct snd_pcm_group *group;
1235 : 0 : bool trylock;
1236 : :
1237 : 0 : for (;;) {
1238 [ # # ]: 0 : if (!snd_pcm_stream_linked(substream))
1239 : : return NULL;
1240 : 0 : group = substream->group;
1241 : : /* block freeing the group object */
1242 : 0 : refcount_inc(&group->refs);
1243 : :
1244 [ # # ]: 0 : trylock = nonatomic ? mutex_trylock(&group->mutex) :
1245 : : spin_trylock(&group->lock);
1246 [ # # ]: 0 : if (trylock)
1247 : : break; /* OK */
1248 : :
1249 : : /* re-lock for avoiding ABBA deadlock */
1250 [ # # ]: 0 : snd_pcm_stream_unlock(substream);
1251 [ # # ]: 0 : snd_pcm_group_lock(group, nonatomic);
1252 : 0 : snd_pcm_stream_lock(substream);
1253 : :
1254 : : /* check the group again; the above opens a small race window */
1255 [ # # ]: 0 : if (substream->group == group)
1256 : : break; /* OK */
1257 : : /* group changed, try again */
1258 : 0 : snd_pcm_group_unref(group, substream);
1259 : : }
1260 : : return group;
1261 : : }
1262 : :
1263 : : /*
1264 : : * Note: call with stream lock
1265 : : */
1266 : 0 : static int snd_pcm_action(const struct action_ops *ops,
1267 : : struct snd_pcm_substream *substream,
1268 : : snd_pcm_state_t state)
1269 : : {
1270 : 0 : struct snd_pcm_group *group;
1271 : 0 : int res;
1272 : :
1273 : 0 : group = snd_pcm_stream_group_ref(substream);
1274 [ # # ]: 0 : if (group)
1275 : 0 : res = snd_pcm_action_group(ops, substream, state, true);
1276 : : else
1277 : 0 : res = snd_pcm_action_single(ops, substream, state);
1278 : 0 : snd_pcm_group_unref(group, substream);
1279 : 0 : return res;
1280 : : }
1281 : :
1282 : : /*
1283 : : * Note: don't use any locks before
1284 : : */
1285 : 0 : static int snd_pcm_action_lock_irq(const struct action_ops *ops,
1286 : : struct snd_pcm_substream *substream,
1287 : : snd_pcm_state_t state)
1288 : : {
1289 : 0 : int res;
1290 : :
1291 : 0 : snd_pcm_stream_lock_irq(substream);
1292 : 0 : res = snd_pcm_action(ops, substream, state);
1293 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
1294 : 0 : return res;
1295 : : }
1296 : :
1297 : : /*
1298 : : */
1299 : 0 : static int snd_pcm_action_nonatomic(const struct action_ops *ops,
1300 : : struct snd_pcm_substream *substream,
1301 : : snd_pcm_state_t state)
1302 : : {
1303 : 0 : int res;
1304 : :
1305 : : /* Guarantee the group members won't change during non-atomic action */
1306 : 0 : down_read(&snd_pcm_link_rwsem);
1307 [ # # ]: 0 : if (snd_pcm_stream_linked(substream))
1308 : 0 : res = snd_pcm_action_group(ops, substream, state, false);
1309 : : else
1310 : 0 : res = snd_pcm_action_single(ops, substream, state);
1311 : 0 : up_read(&snd_pcm_link_rwsem);
1312 : 0 : return res;
1313 : : }
1314 : :
1315 : : /*
1316 : : * start callbacks
1317 : : */
1318 : 0 : static int snd_pcm_pre_start(struct snd_pcm_substream *substream,
1319 : : snd_pcm_state_t state)
1320 : : {
1321 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1322 [ # # ]: 0 : if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1323 : : return -EBADFD;
1324 [ # # # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1325 : : !snd_pcm_playback_data(substream))
1326 : : return -EPIPE;
1327 : 0 : runtime->trigger_tstamp_latched = false;
1328 : 0 : runtime->trigger_master = substream;
1329 : 0 : return 0;
1330 : : }
1331 : :
1332 : 0 : static int snd_pcm_do_start(struct snd_pcm_substream *substream,
1333 : : snd_pcm_state_t state)
1334 : : {
1335 [ # # ]: 0 : if (substream->runtime->trigger_master != substream)
1336 : : return 0;
1337 : 0 : return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1338 : : }
1339 : :
1340 : 0 : static void snd_pcm_undo_start(struct snd_pcm_substream *substream,
1341 : : snd_pcm_state_t state)
1342 : : {
1343 [ # # ]: 0 : if (substream->runtime->trigger_master == substream)
1344 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1345 : 0 : }
1346 : :
1347 : 0 : static void snd_pcm_post_start(struct snd_pcm_substream *substream,
1348 : : snd_pcm_state_t state)
1349 : : {
1350 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1351 : 0 : snd_pcm_trigger_tstamp(substream);
1352 : 0 : runtime->hw_ptr_jiffies = jiffies;
1353 : 0 : runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1354 : 0 : runtime->rate;
1355 : 0 : runtime->status->state = state;
1356 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1357 [ # # ]: 0 : runtime->silence_size > 0)
1358 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
1359 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1360 : 0 : }
1361 : :
1362 : : static const struct action_ops snd_pcm_action_start = {
1363 : : .pre_action = snd_pcm_pre_start,
1364 : : .do_action = snd_pcm_do_start,
1365 : : .undo_action = snd_pcm_undo_start,
1366 : : .post_action = snd_pcm_post_start
1367 : : };
1368 : :
1369 : : /**
1370 : : * snd_pcm_start - start all linked streams
1371 : : * @substream: the PCM substream instance
1372 : : *
1373 : : * Return: Zero if successful, or a negative error code.
1374 : : * The stream lock must be acquired before calling this function.
1375 : : */
1376 : 0 : int snd_pcm_start(struct snd_pcm_substream *substream)
1377 : : {
1378 : 0 : return snd_pcm_action(&snd_pcm_action_start, substream,
1379 : : SNDRV_PCM_STATE_RUNNING);
1380 : : }
1381 : :
1382 : : /* take the stream lock and start the streams */
1383 : 0 : static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1384 : : {
1385 : 0 : return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1386 : : SNDRV_PCM_STATE_RUNNING);
1387 : : }
1388 : :
1389 : : /*
1390 : : * stop callbacks
1391 : : */
1392 : 0 : static int snd_pcm_pre_stop(struct snd_pcm_substream *substream,
1393 : : snd_pcm_state_t state)
1394 : : {
1395 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1396 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1397 : : return -EBADFD;
1398 : 0 : runtime->trigger_master = substream;
1399 : 0 : return 0;
1400 : : }
1401 : :
1402 : 0 : static int snd_pcm_do_stop(struct snd_pcm_substream *substream,
1403 : : snd_pcm_state_t state)
1404 : : {
1405 [ # # ]: 0 : if (substream->runtime->trigger_master == substream &&
1406 [ # # ]: 0 : snd_pcm_running(substream))
1407 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1408 : 0 : return 0; /* unconditonally stop all substreams */
1409 : : }
1410 : :
1411 : 0 : static void snd_pcm_post_stop(struct snd_pcm_substream *substream,
1412 : : snd_pcm_state_t state)
1413 : : {
1414 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1415 [ # # ]: 0 : if (runtime->status->state != state) {
1416 : 0 : snd_pcm_trigger_tstamp(substream);
1417 : 0 : runtime->status->state = state;
1418 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1419 : : }
1420 : 0 : runtime->stop_operating = true;
1421 : 0 : wake_up(&runtime->sleep);
1422 : 0 : wake_up(&runtime->tsleep);
1423 : 0 : }
1424 : :
1425 : : static const struct action_ops snd_pcm_action_stop = {
1426 : : .pre_action = snd_pcm_pre_stop,
1427 : : .do_action = snd_pcm_do_stop,
1428 : : .post_action = snd_pcm_post_stop
1429 : : };
1430 : :
1431 : : /**
1432 : : * snd_pcm_stop - try to stop all running streams in the substream group
1433 : : * @substream: the PCM substream instance
1434 : : * @state: PCM state after stopping the stream
1435 : : *
1436 : : * The state of each stream is then changed to the given state unconditionally.
1437 : : *
1438 : : * Return: Zero if successful, or a negative error code.
1439 : : */
1440 : 0 : int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1441 : : {
1442 : 0 : return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1443 : : }
1444 : : EXPORT_SYMBOL(snd_pcm_stop);
1445 : :
1446 : : /**
1447 : : * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1448 : : * @substream: the PCM substream
1449 : : *
1450 : : * After stopping, the state is changed to SETUP.
1451 : : * Unlike snd_pcm_stop(), this affects only the given stream.
1452 : : *
1453 : : * Return: Zero if succesful, or a negative error code.
1454 : : */
1455 : 0 : int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1456 : : {
1457 : 0 : return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1458 : : SNDRV_PCM_STATE_SETUP);
1459 : : }
1460 : :
1461 : : /**
1462 : : * snd_pcm_stop_xrun - stop the running streams as XRUN
1463 : : * @substream: the PCM substream instance
1464 : : *
1465 : : * This stops the given running substream (and all linked substreams) as XRUN.
1466 : : * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1467 : : *
1468 : : * Return: Zero if successful, or a negative error code.
1469 : : */
1470 : 0 : int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1471 : : {
1472 : 0 : unsigned long flags;
1473 : :
1474 : 0 : snd_pcm_stream_lock_irqsave(substream, flags);
1475 [ # # # # ]: 0 : if (substream->runtime && snd_pcm_running(substream))
1476 : 0 : __snd_pcm_xrun(substream);
1477 : 0 : snd_pcm_stream_unlock_irqrestore(substream, flags);
1478 : 0 : return 0;
1479 : : }
1480 : : EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1481 : :
1482 : : /*
1483 : : * pause callbacks: pass boolean (to start pause or resume) as state argument
1484 : : */
1485 : : #define pause_pushed(state) (__force bool)(state)
1486 : :
1487 : 0 : static int snd_pcm_pre_pause(struct snd_pcm_substream *substream,
1488 : : snd_pcm_state_t state)
1489 : : {
1490 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1491 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1492 : : return -ENOSYS;
1493 [ # # ]: 0 : if (pause_pushed(state)) {
1494 [ # # ]: 0 : if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1495 : : return -EBADFD;
1496 [ # # ]: 0 : } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1497 : : return -EBADFD;
1498 : 0 : runtime->trigger_master = substream;
1499 : 0 : return 0;
1500 : : }
1501 : :
1502 : 0 : static int snd_pcm_do_pause(struct snd_pcm_substream *substream,
1503 : : snd_pcm_state_t state)
1504 : : {
1505 [ # # ]: 0 : if (substream->runtime->trigger_master != substream)
1506 : : return 0;
1507 : : /* some drivers might use hw_ptr to recover from the pause -
1508 : : update the hw_ptr now */
1509 [ # # ]: 0 : if (pause_pushed(state))
1510 : 0 : snd_pcm_update_hw_ptr(substream);
1511 : : /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1512 : : * a delta between the current jiffies, this gives a large enough
1513 : : * delta, effectively to skip the check once.
1514 : : */
1515 : 0 : substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1516 [ # # ]: 0 : return substream->ops->trigger(substream,
1517 : : pause_pushed(state) ?
1518 : : SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1519 : : SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1520 : : }
1521 : :
1522 : 0 : static void snd_pcm_undo_pause(struct snd_pcm_substream *substream,
1523 : : snd_pcm_state_t state)
1524 : : {
1525 [ # # ]: 0 : if (substream->runtime->trigger_master == substream)
1526 [ # # ]: 0 : substream->ops->trigger(substream,
1527 : : pause_pushed(state) ?
1528 : : SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1529 : : SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1530 : 0 : }
1531 : :
1532 : 0 : static void snd_pcm_post_pause(struct snd_pcm_substream *substream,
1533 : : snd_pcm_state_t state)
1534 : : {
1535 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1536 : 0 : snd_pcm_trigger_tstamp(substream);
1537 [ # # ]: 0 : if (pause_pushed(state)) {
1538 : 0 : runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1539 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1540 : 0 : wake_up(&runtime->sleep);
1541 : 0 : wake_up(&runtime->tsleep);
1542 : : } else {
1543 : 0 : runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1544 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1545 : : }
1546 : 0 : }
1547 : :
1548 : : static const struct action_ops snd_pcm_action_pause = {
1549 : : .pre_action = snd_pcm_pre_pause,
1550 : : .do_action = snd_pcm_do_pause,
1551 : : .undo_action = snd_pcm_undo_pause,
1552 : : .post_action = snd_pcm_post_pause
1553 : : };
1554 : :
1555 : : /*
1556 : : * Push/release the pause for all linked streams.
1557 : : */
1558 : 0 : static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push)
1559 : : {
1560 : 0 : return snd_pcm_action(&snd_pcm_action_pause, substream,
1561 : : (__force snd_pcm_state_t)push);
1562 : : }
1563 : :
1564 : 0 : static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream,
1565 : : bool push)
1566 : : {
1567 : 0 : return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream,
1568 : : (__force snd_pcm_state_t)push);
1569 : : }
1570 : :
1571 : : #ifdef CONFIG_PM
1572 : : /* suspend callback: state argument ignored */
1573 : :
1574 : 0 : static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream,
1575 : : snd_pcm_state_t state)
1576 : : {
1577 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1578 [ # # ]: 0 : switch (runtime->status->state) {
1579 : : case SNDRV_PCM_STATE_SUSPENDED:
1580 : : return -EBUSY;
1581 : : /* unresumable PCM state; return -EBUSY for skipping suspend */
1582 : : case SNDRV_PCM_STATE_OPEN:
1583 : : case SNDRV_PCM_STATE_SETUP:
1584 : : case SNDRV_PCM_STATE_DISCONNECTED:
1585 : : return -EBUSY;
1586 : : }
1587 : 0 : runtime->trigger_master = substream;
1588 : 0 : return 0;
1589 : : }
1590 : :
1591 : 0 : static int snd_pcm_do_suspend(struct snd_pcm_substream *substream,
1592 : : snd_pcm_state_t state)
1593 : : {
1594 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1595 [ # # ]: 0 : if (runtime->trigger_master != substream)
1596 : : return 0;
1597 [ # # ]: 0 : if (! snd_pcm_running(substream))
1598 : : return 0;
1599 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1600 : 0 : return 0; /* suspend unconditionally */
1601 : : }
1602 : :
1603 : 0 : static void snd_pcm_post_suspend(struct snd_pcm_substream *substream,
1604 : : snd_pcm_state_t state)
1605 : : {
1606 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1607 : 0 : snd_pcm_trigger_tstamp(substream);
1608 : 0 : runtime->status->suspended_state = runtime->status->state;
1609 : 0 : runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1610 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1611 : 0 : wake_up(&runtime->sleep);
1612 : 0 : wake_up(&runtime->tsleep);
1613 : 0 : }
1614 : :
1615 : : static const struct action_ops snd_pcm_action_suspend = {
1616 : : .pre_action = snd_pcm_pre_suspend,
1617 : : .do_action = snd_pcm_do_suspend,
1618 : : .post_action = snd_pcm_post_suspend
1619 : : };
1620 : :
1621 : : /*
1622 : : * snd_pcm_suspend - trigger SUSPEND to all linked streams
1623 : : * @substream: the PCM substream
1624 : : *
1625 : : * After this call, all streams are changed to SUSPENDED state.
1626 : : *
1627 : : * Return: Zero if successful, or a negative error code.
1628 : : */
1629 : 0 : static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1630 : : {
1631 : 0 : int err;
1632 : 0 : unsigned long flags;
1633 : :
1634 : 0 : snd_pcm_stream_lock_irqsave(substream, flags);
1635 : 0 : err = snd_pcm_action(&snd_pcm_action_suspend, substream,
1636 : : ACTION_ARG_IGNORE);
1637 : 0 : snd_pcm_stream_unlock_irqrestore(substream, flags);
1638 : 0 : return err;
1639 : : }
1640 : :
1641 : : /**
1642 : : * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1643 : : * @pcm: the PCM instance
1644 : : *
1645 : : * After this call, all streams are changed to SUSPENDED state.
1646 : : *
1647 : : * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1648 : : */
1649 : 0 : int snd_pcm_suspend_all(struct snd_pcm *pcm)
1650 : : {
1651 : 0 : struct snd_pcm_substream *substream;
1652 : 0 : int stream, err = 0;
1653 : :
1654 [ # # ]: 0 : if (! pcm)
1655 : : return 0;
1656 : :
1657 [ # # ]: 0 : for (stream = 0; stream < 2; stream++) {
1658 : 0 : for (substream = pcm->streams[stream].substream;
1659 [ # # ]: 0 : substream; substream = substream->next) {
1660 : : /* FIXME: the open/close code should lock this as well */
1661 [ # # ]: 0 : if (substream->runtime == NULL)
1662 : 0 : continue;
1663 : :
1664 : : /*
1665 : : * Skip BE dai link PCM's that are internal and may
1666 : : * not have their substream ops set.
1667 : : */
1668 [ # # ]: 0 : if (!substream->ops)
1669 : 0 : continue;
1670 : :
1671 : 0 : err = snd_pcm_suspend(substream);
1672 [ # # ]: 0 : if (err < 0 && err != -EBUSY)
1673 : 0 : return err;
1674 : : }
1675 : : }
1676 : : return 0;
1677 : : }
1678 : : EXPORT_SYMBOL(snd_pcm_suspend_all);
1679 : :
1680 : : /* resume callbacks: state argument ignored */
1681 : :
1682 : 0 : static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
1683 : : snd_pcm_state_t state)
1684 : : {
1685 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1686 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1687 : : return -ENOSYS;
1688 : 0 : runtime->trigger_master = substream;
1689 : 0 : return 0;
1690 : : }
1691 : :
1692 : 0 : static int snd_pcm_do_resume(struct snd_pcm_substream *substream,
1693 : : snd_pcm_state_t state)
1694 : : {
1695 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1696 [ # # ]: 0 : if (runtime->trigger_master != substream)
1697 : : return 0;
1698 : : /* DMA not running previously? */
1699 [ # # # # ]: 0 : if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1700 : 0 : (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1701 [ # # ]: 0 : substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1702 : : return 0;
1703 : 0 : return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1704 : : }
1705 : :
1706 : 0 : static void snd_pcm_undo_resume(struct snd_pcm_substream *substream,
1707 : : snd_pcm_state_t state)
1708 : : {
1709 [ # # ]: 0 : if (substream->runtime->trigger_master == substream &&
1710 [ # # ]: 0 : snd_pcm_running(substream))
1711 : 0 : substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1712 : 0 : }
1713 : :
1714 : 0 : static void snd_pcm_post_resume(struct snd_pcm_substream *substream,
1715 : : snd_pcm_state_t state)
1716 : : {
1717 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1718 : 0 : snd_pcm_trigger_tstamp(substream);
1719 : 0 : runtime->status->state = runtime->status->suspended_state;
1720 [ # # ]: 0 : snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1721 : 0 : snd_pcm_sync_stop(substream);
1722 : 0 : }
1723 : :
1724 : : static const struct action_ops snd_pcm_action_resume = {
1725 : : .pre_action = snd_pcm_pre_resume,
1726 : : .do_action = snd_pcm_do_resume,
1727 : : .undo_action = snd_pcm_undo_resume,
1728 : : .post_action = snd_pcm_post_resume
1729 : : };
1730 : :
1731 : 0 : static int snd_pcm_resume(struct snd_pcm_substream *substream)
1732 : : {
1733 : 0 : return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream,
1734 : : ACTION_ARG_IGNORE);
1735 : : }
1736 : :
1737 : : #else
1738 : :
1739 : : static int snd_pcm_resume(struct snd_pcm_substream *substream)
1740 : : {
1741 : : return -ENOSYS;
1742 : : }
1743 : :
1744 : : #endif /* CONFIG_PM */
1745 : :
1746 : : /*
1747 : : * xrun ioctl
1748 : : *
1749 : : * Change the RUNNING stream(s) to XRUN state.
1750 : : */
1751 : 0 : static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1752 : : {
1753 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1754 : 0 : int result;
1755 : :
1756 : 0 : snd_pcm_stream_lock_irq(substream);
1757 [ # # # ]: 0 : switch (runtime->status->state) {
1758 : : case SNDRV_PCM_STATE_XRUN:
1759 : : result = 0; /* already there */
1760 : : break;
1761 : 0 : case SNDRV_PCM_STATE_RUNNING:
1762 : 0 : __snd_pcm_xrun(substream);
1763 : 0 : result = 0;
1764 : 0 : break;
1765 : 0 : default:
1766 : 0 : result = -EBADFD;
1767 : : }
1768 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
1769 : 0 : return result;
1770 : : }
1771 : :
1772 : : /*
1773 : : * reset ioctl
1774 : : */
1775 : : /* reset callbacks: state argument ignored */
1776 : 0 : static int snd_pcm_pre_reset(struct snd_pcm_substream *substream,
1777 : : snd_pcm_state_t state)
1778 : : {
1779 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1780 [ # # ]: 0 : switch (runtime->status->state) {
1781 : : case SNDRV_PCM_STATE_RUNNING:
1782 : : case SNDRV_PCM_STATE_PREPARED:
1783 : : case SNDRV_PCM_STATE_PAUSED:
1784 : : case SNDRV_PCM_STATE_SUSPENDED:
1785 : : return 0;
1786 : 0 : default:
1787 : 0 : return -EBADFD;
1788 : : }
1789 : : }
1790 : :
1791 : 0 : static int snd_pcm_do_reset(struct snd_pcm_substream *substream,
1792 : : snd_pcm_state_t state)
1793 : : {
1794 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1795 : 0 : int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1796 [ # # ]: 0 : if (err < 0)
1797 : : return err;
1798 : 0 : runtime->hw_ptr_base = 0;
1799 : 0 : runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1800 : 0 : runtime->status->hw_ptr % runtime->period_size;
1801 : 0 : runtime->silence_start = runtime->status->hw_ptr;
1802 : 0 : runtime->silence_filled = 0;
1803 : 0 : return 0;
1804 : : }
1805 : :
1806 : 0 : static void snd_pcm_post_reset(struct snd_pcm_substream *substream,
1807 : : snd_pcm_state_t state)
1808 : : {
1809 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1810 : 0 : runtime->control->appl_ptr = runtime->status->hw_ptr;
1811 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1812 [ # # ]: 0 : runtime->silence_size > 0)
1813 : 0 : snd_pcm_playback_silence(substream, ULONG_MAX);
1814 : 0 : }
1815 : :
1816 : : static const struct action_ops snd_pcm_action_reset = {
1817 : : .pre_action = snd_pcm_pre_reset,
1818 : : .do_action = snd_pcm_do_reset,
1819 : : .post_action = snd_pcm_post_reset
1820 : : };
1821 : :
1822 : 0 : static int snd_pcm_reset(struct snd_pcm_substream *substream)
1823 : : {
1824 : 0 : return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream,
1825 : : ACTION_ARG_IGNORE);
1826 : : }
1827 : :
1828 : : /*
1829 : : * prepare ioctl
1830 : : */
1831 : : /* pass f_flags as state argument */
1832 : 0 : static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1833 : : snd_pcm_state_t state)
1834 : : {
1835 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1836 : 0 : int f_flags = (__force int)state;
1837 : :
1838 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1839 : : runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1840 : : return -EBADFD;
1841 [ # # ]: 0 : if (snd_pcm_running(substream))
1842 : : return -EBUSY;
1843 : 0 : substream->f_flags = f_flags;
1844 : 0 : return 0;
1845 : : }
1846 : :
1847 : 0 : static int snd_pcm_do_prepare(struct snd_pcm_substream *substream,
1848 : : snd_pcm_state_t state)
1849 : : {
1850 : 0 : int err;
1851 : 0 : snd_pcm_sync_stop(substream);
1852 : 0 : err = substream->ops->prepare(substream);
1853 [ # # ]: 0 : if (err < 0)
1854 : : return err;
1855 : 0 : return snd_pcm_do_reset(substream, state);
1856 : : }
1857 : :
1858 : 0 : static void snd_pcm_post_prepare(struct snd_pcm_substream *substream,
1859 : : snd_pcm_state_t state)
1860 : : {
1861 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1862 : 0 : runtime->control->appl_ptr = runtime->status->hw_ptr;
1863 : 0 : snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1864 : 0 : }
1865 : :
1866 : : static const struct action_ops snd_pcm_action_prepare = {
1867 : : .pre_action = snd_pcm_pre_prepare,
1868 : : .do_action = snd_pcm_do_prepare,
1869 : : .post_action = snd_pcm_post_prepare
1870 : : };
1871 : :
1872 : : /**
1873 : : * snd_pcm_prepare - prepare the PCM substream to be triggerable
1874 : : * @substream: the PCM substream instance
1875 : : * @file: file to refer f_flags
1876 : : *
1877 : : * Return: Zero if successful, or a negative error code.
1878 : : */
1879 : 0 : static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1880 : : struct file *file)
1881 : : {
1882 : 0 : int f_flags;
1883 : :
1884 [ # # ]: 0 : if (file)
1885 : 0 : f_flags = file->f_flags;
1886 : : else
1887 : 0 : f_flags = substream->f_flags;
1888 : :
1889 : 0 : snd_pcm_stream_lock_irq(substream);
1890 [ # # # ]: 0 : switch (substream->runtime->status->state) {
1891 : : case SNDRV_PCM_STATE_PAUSED:
1892 : 0 : snd_pcm_pause(substream, false);
1893 : : /* fallthru */
1894 : 0 : case SNDRV_PCM_STATE_SUSPENDED:
1895 : 0 : snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1896 : : break;
1897 : : }
1898 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
1899 : :
1900 : 0 : return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1901 : : substream,
1902 : : (__force snd_pcm_state_t)f_flags);
1903 : : }
1904 : :
1905 : : /*
1906 : : * drain ioctl
1907 : : */
1908 : :
1909 : : /* drain init callbacks: state argument ignored */
1910 : 0 : static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream,
1911 : : snd_pcm_state_t state)
1912 : : {
1913 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1914 [ # # ]: 0 : switch (runtime->status->state) {
1915 : : case SNDRV_PCM_STATE_OPEN:
1916 : : case SNDRV_PCM_STATE_DISCONNECTED:
1917 : : case SNDRV_PCM_STATE_SUSPENDED:
1918 : : return -EBADFD;
1919 : : }
1920 : 0 : runtime->trigger_master = substream;
1921 : 0 : return 0;
1922 : : }
1923 : :
1924 : 0 : static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream,
1925 : : snd_pcm_state_t state)
1926 : : {
1927 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1928 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1929 [ # # # # ]: 0 : switch (runtime->status->state) {
1930 : 0 : case SNDRV_PCM_STATE_PREPARED:
1931 : : /* start playback stream if possible */
1932 [ # # # # ]: 0 : if (! snd_pcm_playback_empty(substream)) {
1933 [ # # ]: 0 : snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1934 : 0 : snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1935 : : } else {
1936 : 0 : runtime->status->state = SNDRV_PCM_STATE_SETUP;
1937 : : }
1938 : : break;
1939 : 0 : case SNDRV_PCM_STATE_RUNNING:
1940 : 0 : runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1941 : 0 : break;
1942 : 0 : case SNDRV_PCM_STATE_XRUN:
1943 : 0 : runtime->status->state = SNDRV_PCM_STATE_SETUP;
1944 : 0 : break;
1945 : : default:
1946 : : break;
1947 : : }
1948 : : } else {
1949 : : /* stop running stream */
1950 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1951 : 0 : snd_pcm_state_t new_state;
1952 : :
1953 [ # # ]: 0 : new_state = snd_pcm_capture_avail(runtime) > 0 ?
1954 [ # # ]: 0 : SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1955 : 0 : snd_pcm_do_stop(substream, new_state);
1956 : 0 : snd_pcm_post_stop(substream, new_state);
1957 : : }
1958 : : }
1959 : :
1960 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1961 [ # # ]: 0 : runtime->trigger_master == substream &&
1962 [ # # ]: 0 : (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1963 : 0 : return substream->ops->trigger(substream,
1964 : : SNDRV_PCM_TRIGGER_DRAIN);
1965 : :
1966 : : return 0;
1967 : : }
1968 : :
1969 : 0 : static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream,
1970 : : snd_pcm_state_t state)
1971 : : {
1972 : 0 : }
1973 : :
1974 : : static const struct action_ops snd_pcm_action_drain_init = {
1975 : : .pre_action = snd_pcm_pre_drain_init,
1976 : : .do_action = snd_pcm_do_drain_init,
1977 : : .post_action = snd_pcm_post_drain_init
1978 : : };
1979 : :
1980 : : /*
1981 : : * Drain the stream(s).
1982 : : * When the substream is linked, sync until the draining of all playback streams
1983 : : * is finished.
1984 : : * After this call, all streams are supposed to be either SETUP or DRAINING
1985 : : * (capture only) state.
1986 : : */
1987 : 0 : static int snd_pcm_drain(struct snd_pcm_substream *substream,
1988 : : struct file *file)
1989 : : {
1990 : 0 : struct snd_card *card;
1991 : 0 : struct snd_pcm_runtime *runtime;
1992 : 0 : struct snd_pcm_substream *s;
1993 : 0 : struct snd_pcm_group *group;
1994 : 0 : wait_queue_entry_t wait;
1995 : 0 : int result = 0;
1996 : 0 : int nonblock = 0;
1997 : :
1998 : 0 : card = substream->pcm->card;
1999 : 0 : runtime = substream->runtime;
2000 : :
2001 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2002 : : return -EBADFD;
2003 : :
2004 [ # # ]: 0 : if (file) {
2005 [ # # ]: 0 : if (file->f_flags & O_NONBLOCK)
2006 : 0 : nonblock = 1;
2007 [ # # ]: 0 : } else if (substream->f_flags & O_NONBLOCK)
2008 : 0 : nonblock = 1;
2009 : :
2010 : 0 : snd_pcm_stream_lock_irq(substream);
2011 : : /* resume pause */
2012 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
2013 : 0 : snd_pcm_pause(substream, false);
2014 : :
2015 : : /* pre-start/stop - all running streams are changed to DRAINING state */
2016 : 0 : result = snd_pcm_action(&snd_pcm_action_drain_init, substream,
2017 : : ACTION_ARG_IGNORE);
2018 [ # # ]: 0 : if (result < 0)
2019 : 0 : goto unlock;
2020 : : /* in non-blocking, we don't wait in ioctl but let caller poll */
2021 [ # # ]: 0 : if (nonblock) {
2022 : 0 : result = -EAGAIN;
2023 : 0 : goto unlock;
2024 : : }
2025 : :
2026 : 0 : for (;;) {
2027 : 0 : long tout;
2028 : 0 : struct snd_pcm_runtime *to_check;
2029 [ # # ]: 0 : if (signal_pending(current)) {
2030 : : result = -ERESTARTSYS;
2031 : : break;
2032 : : }
2033 : : /* find a substream to drain */
2034 : 0 : to_check = NULL;
2035 : 0 : group = snd_pcm_stream_group_ref(substream);
2036 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
2037 [ # # ]: 0 : if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
2038 : 0 : continue;
2039 : 0 : runtime = s->runtime;
2040 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
2041 : : to_check = runtime;
2042 : : break;
2043 : : }
2044 : : }
2045 : 0 : snd_pcm_group_unref(group, substream);
2046 [ # # ]: 0 : if (!to_check)
2047 : : break; /* all drained */
2048 : 0 : init_waitqueue_entry(&wait, current);
2049 : 0 : set_current_state(TASK_INTERRUPTIBLE);
2050 : 0 : add_wait_queue(&to_check->sleep, &wait);
2051 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2052 [ # # ]: 0 : if (runtime->no_period_wakeup)
2053 : : tout = MAX_SCHEDULE_TIMEOUT;
2054 : : else {
2055 : 0 : tout = 10;
2056 [ # # ]: 0 : if (runtime->rate) {
2057 : 0 : long t = runtime->period_size * 2 / runtime->rate;
2058 : 0 : tout = max(t, tout);
2059 : : }
2060 [ # # ]: 0 : tout = msecs_to_jiffies(tout * 1000);
2061 : : }
2062 : 0 : tout = schedule_timeout(tout);
2063 : :
2064 : 0 : snd_pcm_stream_lock_irq(substream);
2065 : 0 : group = snd_pcm_stream_group_ref(substream);
2066 [ # # ]: 0 : snd_pcm_group_for_each_entry(s, substream) {
2067 [ # # ]: 0 : if (s->runtime == to_check) {
2068 : 0 : remove_wait_queue(&to_check->sleep, &wait);
2069 : 0 : break;
2070 : : }
2071 : : }
2072 : 0 : snd_pcm_group_unref(group, substream);
2073 : :
2074 [ # # ]: 0 : if (card->shutdown) {
2075 : : result = -ENODEV;
2076 : : break;
2077 : : }
2078 [ # # ]: 0 : if (tout == 0) {
2079 [ # # ]: 0 : if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
2080 : : result = -ESTRPIPE;
2081 : : else {
2082 : 0 : dev_dbg(substream->pcm->card->dev,
2083 : : "playback drain error (DMA or IRQ trouble?)\n");
2084 : 0 : snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2085 : 0 : result = -EIO;
2086 : : }
2087 : : break;
2088 : : }
2089 : : }
2090 : :
2091 : 0 : unlock:
2092 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2093 : :
2094 : : return result;
2095 : : }
2096 : :
2097 : : /*
2098 : : * drop ioctl
2099 : : *
2100 : : * Immediately put all linked substreams into SETUP state.
2101 : : */
2102 : 0 : static int snd_pcm_drop(struct snd_pcm_substream *substream)
2103 : : {
2104 : 0 : struct snd_pcm_runtime *runtime;
2105 : 0 : int result = 0;
2106 : :
2107 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
2108 : : return -ENXIO;
2109 : 0 : runtime = substream->runtime;
2110 : :
2111 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2112 : : runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
2113 : : return -EBADFD;
2114 : :
2115 : 0 : snd_pcm_stream_lock_irq(substream);
2116 : : /* resume pause */
2117 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
2118 : 0 : snd_pcm_pause(substream, false);
2119 : :
2120 : 0 : snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2121 : : /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
2122 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2123 : :
2124 : : return result;
2125 : : }
2126 : :
2127 : :
2128 : 0 : static bool is_pcm_file(struct file *file)
2129 : : {
2130 [ # # ]: 0 : struct inode *inode = file_inode(file);
2131 : 0 : struct snd_pcm *pcm;
2132 : 0 : unsigned int minor;
2133 : :
2134 [ # # # # ]: 0 : if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
2135 : : return false;
2136 : 0 : minor = iminor(inode);
2137 : 0 : pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2138 [ # # ]: 0 : if (!pcm)
2139 : 0 : pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2140 [ # # ]: 0 : if (!pcm)
2141 : : return false;
2142 : 0 : snd_card_unref(pcm->card);
2143 : 0 : return true;
2144 : : }
2145 : :
2146 : : /*
2147 : : * PCM link handling
2148 : : */
2149 : 0 : static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
2150 : : {
2151 : 0 : int res = 0;
2152 : 0 : struct snd_pcm_file *pcm_file;
2153 : 0 : struct snd_pcm_substream *substream1;
2154 : 0 : struct snd_pcm_group *group, *target_group;
2155 : 0 : bool nonatomic = substream->pcm->nonatomic;
2156 : 0 : struct fd f = fdget(fd);
2157 : :
2158 [ # # ]: 0 : if (!f.file)
2159 : : return -EBADFD;
2160 [ # # ]: 0 : if (!is_pcm_file(f.file)) {
2161 : 0 : res = -EBADFD;
2162 : 0 : goto _badf;
2163 : : }
2164 : 0 : pcm_file = f.file->private_data;
2165 : 0 : substream1 = pcm_file->substream;
2166 : 0 : group = kzalloc(sizeof(*group), GFP_KERNEL);
2167 [ # # ]: 0 : if (!group) {
2168 : 0 : res = -ENOMEM;
2169 : 0 : goto _nolock;
2170 : : }
2171 : 0 : snd_pcm_group_init(group);
2172 : :
2173 : 0 : down_write(&snd_pcm_link_rwsem);
2174 [ # # ]: 0 : if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2175 [ # # ]: 0 : substream->runtime->status->state != substream1->runtime->status->state ||
2176 [ # # ]: 0 : substream->pcm->nonatomic != substream1->pcm->nonatomic) {
2177 : 0 : res = -EBADFD;
2178 : 0 : goto _end;
2179 : : }
2180 [ # # ]: 0 : if (snd_pcm_stream_linked(substream1)) {
2181 : 0 : res = -EALREADY;
2182 : 0 : goto _end;
2183 : : }
2184 : :
2185 : 0 : snd_pcm_stream_lock_irq(substream);
2186 [ # # ]: 0 : if (!snd_pcm_stream_linked(substream)) {
2187 : 0 : snd_pcm_group_assign(substream, group);
2188 : 0 : group = NULL; /* assigned, don't free this one below */
2189 : : }
2190 : 0 : target_group = substream->group;
2191 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2192 : :
2193 [ # # ]: 0 : snd_pcm_group_lock_irq(target_group, nonatomic);
2194 : 0 : snd_pcm_stream_lock(substream1);
2195 : 0 : snd_pcm_group_assign(substream1, target_group);
2196 : 0 : refcount_inc(&target_group->refs);
2197 [ # # ]: 0 : snd_pcm_stream_unlock(substream1);
2198 [ # # ]: 0 : snd_pcm_group_unlock_irq(target_group, nonatomic);
2199 : 0 : _end:
2200 : 0 : up_write(&snd_pcm_link_rwsem);
2201 : 0 : _nolock:
2202 : 0 : kfree(group);
2203 : 0 : _badf:
2204 [ # # ]: 0 : fdput(f);
2205 : : return res;
2206 : : }
2207 : :
2208 : 0 : static void relink_to_local(struct snd_pcm_substream *substream)
2209 : : {
2210 : 0 : snd_pcm_stream_lock(substream);
2211 [ # # ]: 0 : snd_pcm_group_assign(substream, &substream->self_group);
2212 [ # # ]: 0 : snd_pcm_stream_unlock(substream);
2213 : 0 : }
2214 : :
2215 : 0 : static int snd_pcm_unlink(struct snd_pcm_substream *substream)
2216 : : {
2217 : 0 : struct snd_pcm_group *group;
2218 : 0 : bool nonatomic = substream->pcm->nonatomic;
2219 : 0 : bool do_free = false;
2220 : 0 : int res = 0;
2221 : :
2222 : 0 : down_write(&snd_pcm_link_rwsem);
2223 : :
2224 [ # # ]: 0 : if (!snd_pcm_stream_linked(substream)) {
2225 : 0 : res = -EALREADY;
2226 : 0 : goto _end;
2227 : : }
2228 : :
2229 : 0 : group = substream->group;
2230 [ # # ]: 0 : snd_pcm_group_lock_irq(group, nonatomic);
2231 : :
2232 : 0 : relink_to_local(substream);
2233 : 0 : refcount_dec(&group->refs);
2234 : :
2235 : : /* detach the last stream, too */
2236 [ # # ]: 0 : if (list_is_singular(&group->substreams)) {
2237 : 0 : relink_to_local(list_first_entry(&group->substreams,
2238 : : struct snd_pcm_substream,
2239 : : link_list));
2240 : 0 : do_free = refcount_dec_and_test(&group->refs);
2241 : : }
2242 : :
2243 [ # # ]: 0 : snd_pcm_group_unlock_irq(group, nonatomic);
2244 [ # # ]: 0 : if (do_free)
2245 : 0 : kfree(group);
2246 : :
2247 : 0 : _end:
2248 : 0 : up_write(&snd_pcm_link_rwsem);
2249 : 0 : return res;
2250 : : }
2251 : :
2252 : : /*
2253 : : * hw configurator
2254 : : */
2255 : 0 : static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2256 : : struct snd_pcm_hw_rule *rule)
2257 : : {
2258 : 0 : struct snd_interval t;
2259 : 0 : snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2260 : : hw_param_interval_c(params, rule->deps[1]), &t);
2261 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2262 : : }
2263 : :
2264 : 0 : static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2265 : : struct snd_pcm_hw_rule *rule)
2266 : : {
2267 : 0 : struct snd_interval t;
2268 : 0 : snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2269 : : hw_param_interval_c(params, rule->deps[1]), &t);
2270 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2271 : : }
2272 : :
2273 : 0 : static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2274 : : struct snd_pcm_hw_rule *rule)
2275 : : {
2276 : 0 : struct snd_interval t;
2277 : 0 : snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2278 : : hw_param_interval_c(params, rule->deps[1]),
2279 : 0 : (unsigned long) rule->private, &t);
2280 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2281 : : }
2282 : :
2283 : 0 : static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2284 : : struct snd_pcm_hw_rule *rule)
2285 : : {
2286 : 0 : struct snd_interval t;
2287 : 0 : snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2288 : 0 : (unsigned long) rule->private,
2289 : : hw_param_interval_c(params, rule->deps[1]), &t);
2290 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2291 : : }
2292 : :
2293 : 0 : static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2294 : : struct snd_pcm_hw_rule *rule)
2295 : : {
2296 : 0 : unsigned int k;
2297 : 0 : const struct snd_interval *i =
2298 : 0 : hw_param_interval_c(params, rule->deps[0]);
2299 : 0 : struct snd_mask m;
2300 : 0 : struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2301 : 0 : snd_mask_any(&m);
2302 [ # # ]: 0 : for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2303 : 0 : int bits;
2304 [ # # ]: 0 : if (! snd_mask_test(mask, k))
2305 : 0 : continue;
2306 : 0 : bits = snd_pcm_format_physical_width(k);
2307 [ # # ]: 0 : if (bits <= 0)
2308 : 0 : continue; /* ignore invalid formats */
2309 [ # # # # ]: 0 : if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2310 : 0 : snd_mask_reset(&m, k);
2311 : : }
2312 : 0 : return snd_mask_refine(mask, &m);
2313 : : }
2314 : :
2315 : 0 : static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2316 : : struct snd_pcm_hw_rule *rule)
2317 : : {
2318 : 0 : struct snd_interval t;
2319 : 0 : unsigned int k;
2320 : 0 : t.min = UINT_MAX;
2321 : 0 : t.max = 0;
2322 : 0 : t.openmin = 0;
2323 : 0 : t.openmax = 0;
2324 [ # # ]: 0 : for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2325 : 0 : int bits;
2326 [ # # ]: 0 : if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2327 : 0 : continue;
2328 : 0 : bits = snd_pcm_format_physical_width(k);
2329 [ # # ]: 0 : if (bits <= 0)
2330 : 0 : continue; /* ignore invalid formats */
2331 [ # # ]: 0 : if (t.min > (unsigned)bits)
2332 : 0 : t.min = bits;
2333 [ # # ]: 0 : if (t.max < (unsigned)bits)
2334 : 0 : t.max = bits;
2335 : : }
2336 : 0 : t.integer = 1;
2337 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2338 : : }
2339 : :
2340 : : #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2341 : : #error "Change this table"
2342 : : #endif
2343 : :
2344 : : static const unsigned int rates[] = {
2345 : : 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2346 : : 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
2347 : : };
2348 : :
2349 : : const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2350 : : .count = ARRAY_SIZE(rates),
2351 : : .list = rates,
2352 : : };
2353 : :
2354 : 0 : static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2355 : : struct snd_pcm_hw_rule *rule)
2356 : : {
2357 : 0 : struct snd_pcm_hardware *hw = rule->private;
2358 : 0 : return snd_interval_list(hw_param_interval(params, rule->var),
2359 : : snd_pcm_known_rates.count,
2360 : : snd_pcm_known_rates.list, hw->rates);
2361 : : }
2362 : :
2363 : 0 : static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2364 : : struct snd_pcm_hw_rule *rule)
2365 : : {
2366 : 0 : struct snd_interval t;
2367 : 0 : struct snd_pcm_substream *substream = rule->private;
2368 : 0 : t.min = 0;
2369 : 0 : t.max = substream->buffer_bytes_max;
2370 : 0 : t.openmin = 0;
2371 : 0 : t.openmax = 0;
2372 : 0 : t.integer = 1;
2373 : 0 : return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2374 : : }
2375 : :
2376 : : static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
2377 : : {
2378 : : struct snd_pcm_runtime *runtime = substream->runtime;
2379 : : struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
2380 : : int k, err;
2381 : :
2382 : : for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2383 : : snd_mask_any(constrs_mask(constrs, k));
2384 : : }
2385 : :
2386 : : for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2387 : : snd_interval_any(constrs_interval(constrs, k));
2388 : : }
2389 : :
2390 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2391 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2392 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2393 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2394 : : snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2395 : :
2396 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2397 : : snd_pcm_hw_rule_format, NULL,
2398 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2399 : : if (err < 0)
2400 : : return err;
2401 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2402 : : snd_pcm_hw_rule_sample_bits, NULL,
2403 : : SNDRV_PCM_HW_PARAM_FORMAT,
2404 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2405 : : if (err < 0)
2406 : : return err;
2407 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2408 : : snd_pcm_hw_rule_div, NULL,
2409 : : SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2410 : : if (err < 0)
2411 : : return err;
2412 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2413 : : snd_pcm_hw_rule_mul, NULL,
2414 : : SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2415 : : if (err < 0)
2416 : : return err;
2417 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2418 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
2419 : : SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2420 : : if (err < 0)
2421 : : return err;
2422 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2423 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
2424 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2425 : : if (err < 0)
2426 : : return err;
2427 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2428 : : snd_pcm_hw_rule_div, NULL,
2429 : : SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2430 : : if (err < 0)
2431 : : return err;
2432 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2433 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2434 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2435 : : if (err < 0)
2436 : : return err;
2437 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2438 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2439 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2440 : : if (err < 0)
2441 : : return err;
2442 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2443 : : snd_pcm_hw_rule_div, NULL,
2444 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2445 : : if (err < 0)
2446 : : return err;
2447 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2448 : : snd_pcm_hw_rule_div, NULL,
2449 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2450 : : if (err < 0)
2451 : : return err;
2452 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2453 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
2454 : : SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2455 : : if (err < 0)
2456 : : return err;
2457 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2458 : : snd_pcm_hw_rule_muldivk, (void*) 1000000,
2459 : : SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2460 : : if (err < 0)
2461 : : return err;
2462 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2463 : : snd_pcm_hw_rule_mul, NULL,
2464 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2465 : : if (err < 0)
2466 : : return err;
2467 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2468 : : snd_pcm_hw_rule_mulkdiv, (void*) 8,
2469 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2470 : : if (err < 0)
2471 : : return err;
2472 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2473 : : snd_pcm_hw_rule_muldivk, (void*) 1000000,
2474 : : SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2475 : : if (err < 0)
2476 : : return err;
2477 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2478 : : snd_pcm_hw_rule_muldivk, (void*) 8,
2479 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2480 : : if (err < 0)
2481 : : return err;
2482 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2483 : : snd_pcm_hw_rule_muldivk, (void*) 8,
2484 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2485 : : if (err < 0)
2486 : : return err;
2487 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2488 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2489 : : SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2490 : : if (err < 0)
2491 : : return err;
2492 : : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2493 : : snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2494 : : SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2495 : : if (err < 0)
2496 : : return err;
2497 : : return 0;
2498 : : }
2499 : :
2500 : 0 : static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2501 : : {
2502 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2503 : 0 : struct snd_pcm_hardware *hw = &runtime->hw;
2504 : 0 : int err;
2505 : 0 : unsigned int mask = 0;
2506 : :
2507 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2508 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2509 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2510 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2511 [ # # ]: 0 : if (hw_support_mmap(substream)) {
2512 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2513 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2514 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2515 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2516 [ # # ]: 0 : if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2517 : 0 : mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2518 : : }
2519 : 0 : err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2520 [ # # ]: 0 : if (err < 0)
2521 : : return err;
2522 : :
2523 : 0 : err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2524 [ # # ]: 0 : if (err < 0)
2525 : : return err;
2526 : :
2527 : 0 : err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2528 [ # # ]: 0 : if (err < 0)
2529 : : return err;
2530 : :
2531 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2532 : : hw->channels_min, hw->channels_max);
2533 [ # # ]: 0 : if (err < 0)
2534 : : return err;
2535 : :
2536 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2537 : : hw->rate_min, hw->rate_max);
2538 [ # # ]: 0 : if (err < 0)
2539 : : return err;
2540 : :
2541 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2542 : 0 : hw->period_bytes_min, hw->period_bytes_max);
2543 [ # # ]: 0 : if (err < 0)
2544 : : return err;
2545 : :
2546 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2547 : : hw->periods_min, hw->periods_max);
2548 [ # # ]: 0 : if (err < 0)
2549 : : return err;
2550 : :
2551 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2552 : 0 : hw->period_bytes_min, hw->buffer_bytes_max);
2553 [ # # ]: 0 : if (err < 0)
2554 : : return err;
2555 : :
2556 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2557 : : snd_pcm_hw_rule_buffer_bytes_max, substream,
2558 : : SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2559 [ # # ]: 0 : if (err < 0)
2560 : : return err;
2561 : :
2562 : : /* FIXME: remove */
2563 [ # # ]: 0 : if (runtime->dma_bytes) {
2564 : 0 : err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2565 [ # # ]: 0 : if (err < 0)
2566 : : return err;
2567 : : }
2568 : :
2569 [ # # ]: 0 : if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2570 : 0 : err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2571 : : snd_pcm_hw_rule_rate, hw,
2572 : : SNDRV_PCM_HW_PARAM_RATE, -1);
2573 [ # # ]: 0 : if (err < 0)
2574 : : return err;
2575 : : }
2576 : :
2577 : : /* FIXME: this belong to lowlevel */
2578 : 0 : snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2579 : :
2580 : 0 : return 0;
2581 : : }
2582 : :
2583 : 0 : static void pcm_release_private(struct snd_pcm_substream *substream)
2584 : : {
2585 [ # # ]: 0 : if (snd_pcm_stream_linked(substream))
2586 : 0 : snd_pcm_unlink(substream);
2587 : 0 : }
2588 : :
2589 : 0 : void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2590 : : {
2591 : 0 : substream->ref_count--;
2592 [ # # ]: 0 : if (substream->ref_count > 0)
2593 : : return;
2594 : :
2595 : 0 : snd_pcm_drop(substream);
2596 [ # # ]: 0 : if (substream->hw_opened) {
2597 [ # # ]: 0 : if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2598 : 0 : do_hw_free(substream);
2599 : 0 : substream->ops->close(substream);
2600 : 0 : substream->hw_opened = 0;
2601 : : }
2602 [ # # ]: 0 : if (pm_qos_request_active(&substream->latency_pm_qos_req))
2603 : 0 : pm_qos_remove_request(&substream->latency_pm_qos_req);
2604 [ # # ]: 0 : if (substream->pcm_release) {
2605 : 0 : substream->pcm_release(substream);
2606 : 0 : substream->pcm_release = NULL;
2607 : : }
2608 : 0 : snd_pcm_detach_substream(substream);
2609 : : }
2610 : : EXPORT_SYMBOL(snd_pcm_release_substream);
2611 : :
2612 : 0 : int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2613 : : struct file *file,
2614 : : struct snd_pcm_substream **rsubstream)
2615 : : {
2616 : 0 : struct snd_pcm_substream *substream;
2617 : 0 : int err;
2618 : :
2619 : 0 : err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2620 [ # # ]: 0 : if (err < 0)
2621 : : return err;
2622 [ # # ]: 0 : if (substream->ref_count > 1) {
2623 : 0 : *rsubstream = substream;
2624 : 0 : return 0;
2625 : : }
2626 : :
2627 : 0 : err = snd_pcm_hw_constraints_init(substream);
2628 [ # # ]: 0 : if (err < 0) {
2629 : 0 : pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2630 : 0 : goto error;
2631 : : }
2632 : :
2633 [ # # ]: 0 : if ((err = substream->ops->open(substream)) < 0)
2634 : 0 : goto error;
2635 : :
2636 : 0 : substream->hw_opened = 1;
2637 : :
2638 : 0 : err = snd_pcm_hw_constraints_complete(substream);
2639 [ # # ]: 0 : if (err < 0) {
2640 : 0 : pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2641 : 0 : goto error;
2642 : : }
2643 : :
2644 : 0 : *rsubstream = substream;
2645 : 0 : return 0;
2646 : :
2647 : 0 : error:
2648 : 0 : snd_pcm_release_substream(substream);
2649 : 0 : return err;
2650 : : }
2651 : : EXPORT_SYMBOL(snd_pcm_open_substream);
2652 : :
2653 : 0 : static int snd_pcm_open_file(struct file *file,
2654 : : struct snd_pcm *pcm,
2655 : : int stream)
2656 : : {
2657 : 0 : struct snd_pcm_file *pcm_file;
2658 : 0 : struct snd_pcm_substream *substream;
2659 : 0 : int err;
2660 : :
2661 : 0 : err = snd_pcm_open_substream(pcm, stream, file, &substream);
2662 [ # # ]: 0 : if (err < 0)
2663 : : return err;
2664 : :
2665 : 0 : pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2666 [ # # ]: 0 : if (pcm_file == NULL) {
2667 : 0 : snd_pcm_release_substream(substream);
2668 : 0 : return -ENOMEM;
2669 : : }
2670 : 0 : pcm_file->substream = substream;
2671 [ # # ]: 0 : if (substream->ref_count == 1)
2672 : 0 : substream->pcm_release = pcm_release_private;
2673 : 0 : file->private_data = pcm_file;
2674 : :
2675 : 0 : return 0;
2676 : : }
2677 : :
2678 : 0 : static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2679 : : {
2680 : 0 : struct snd_pcm *pcm;
2681 : 0 : int err = nonseekable_open(inode, file);
2682 [ # # ]: 0 : if (err < 0)
2683 : : return err;
2684 : 0 : pcm = snd_lookup_minor_data(iminor(inode),
2685 : : SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2686 : 0 : err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2687 [ # # ]: 0 : if (pcm)
2688 : 0 : snd_card_unref(pcm->card);
2689 : : return err;
2690 : : }
2691 : :
2692 : 0 : static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2693 : : {
2694 : 0 : struct snd_pcm *pcm;
2695 : 0 : int err = nonseekable_open(inode, file);
2696 [ # # ]: 0 : if (err < 0)
2697 : : return err;
2698 : 0 : pcm = snd_lookup_minor_data(iminor(inode),
2699 : : SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2700 : 0 : err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2701 [ # # ]: 0 : if (pcm)
2702 : 0 : snd_card_unref(pcm->card);
2703 : : return err;
2704 : : }
2705 : :
2706 : 0 : static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2707 : : {
2708 : 0 : int err;
2709 : 0 : wait_queue_entry_t wait;
2710 : :
2711 [ # # ]: 0 : if (pcm == NULL) {
2712 : 0 : err = -ENODEV;
2713 : 0 : goto __error1;
2714 : : }
2715 : 0 : err = snd_card_file_add(pcm->card, file);
2716 [ # # ]: 0 : if (err < 0)
2717 : 0 : goto __error1;
2718 [ # # ]: 0 : if (!try_module_get(pcm->card->module)) {
2719 : 0 : err = -EFAULT;
2720 : 0 : goto __error2;
2721 : : }
2722 : 0 : init_waitqueue_entry(&wait, current);
2723 : 0 : add_wait_queue(&pcm->open_wait, &wait);
2724 : 0 : mutex_lock(&pcm->open_mutex);
2725 : 0 : while (1) {
2726 : 0 : err = snd_pcm_open_file(file, pcm, stream);
2727 [ # # ]: 0 : if (err >= 0)
2728 : : break;
2729 [ # # ]: 0 : if (err == -EAGAIN) {
2730 [ # # ]: 0 : if (file->f_flags & O_NONBLOCK) {
2731 : : err = -EBUSY;
2732 : : break;
2733 : : }
2734 : : } else
2735 : : break;
2736 : 0 : set_current_state(TASK_INTERRUPTIBLE);
2737 : 0 : mutex_unlock(&pcm->open_mutex);
2738 : 0 : schedule();
2739 : 0 : mutex_lock(&pcm->open_mutex);
2740 [ # # ]: 0 : if (pcm->card->shutdown) {
2741 : : err = -ENODEV;
2742 : : break;
2743 : : }
2744 [ # # ]: 0 : if (signal_pending(current)) {
2745 : : err = -ERESTARTSYS;
2746 : : break;
2747 : : }
2748 : : }
2749 : 0 : remove_wait_queue(&pcm->open_wait, &wait);
2750 : 0 : mutex_unlock(&pcm->open_mutex);
2751 [ # # ]: 0 : if (err < 0)
2752 : 0 : goto __error;
2753 : : return err;
2754 : :
2755 : : __error:
2756 : 0 : module_put(pcm->card->module);
2757 : 0 : __error2:
2758 : 0 : snd_card_file_remove(pcm->card, file);
2759 : : __error1:
2760 : : return err;
2761 : : }
2762 : :
2763 : 0 : static int snd_pcm_release(struct inode *inode, struct file *file)
2764 : : {
2765 : 0 : struct snd_pcm *pcm;
2766 : 0 : struct snd_pcm_substream *substream;
2767 : 0 : struct snd_pcm_file *pcm_file;
2768 : :
2769 : 0 : pcm_file = file->private_data;
2770 : 0 : substream = pcm_file->substream;
2771 [ # # ]: 0 : if (snd_BUG_ON(!substream))
2772 : : return -ENXIO;
2773 : 0 : pcm = substream->pcm;
2774 : 0 : mutex_lock(&pcm->open_mutex);
2775 : 0 : snd_pcm_release_substream(substream);
2776 : 0 : kfree(pcm_file);
2777 : 0 : mutex_unlock(&pcm->open_mutex);
2778 : 0 : wake_up(&pcm->open_wait);
2779 : 0 : module_put(pcm->card->module);
2780 : 0 : snd_card_file_remove(pcm->card, file);
2781 : 0 : return 0;
2782 : : }
2783 : :
2784 : : /* check and update PCM state; return 0 or a negative error
2785 : : * call this inside PCM lock
2786 : : */
2787 : 0 : static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2788 : : {
2789 [ # # # # : 0 : switch (substream->runtime->status->state) {
# # ]
2790 : 0 : case SNDRV_PCM_STATE_DRAINING:
2791 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2792 : : return -EBADFD;
2793 : : /* Fall through */
2794 : : case SNDRV_PCM_STATE_RUNNING:
2795 : 0 : return snd_pcm_update_hw_ptr(substream);
2796 : : case SNDRV_PCM_STATE_PREPARED:
2797 : : case SNDRV_PCM_STATE_PAUSED:
2798 : : return 0;
2799 : 0 : case SNDRV_PCM_STATE_SUSPENDED:
2800 : 0 : return -ESTRPIPE;
2801 : 0 : case SNDRV_PCM_STATE_XRUN:
2802 : 0 : return -EPIPE;
2803 : 0 : default:
2804 : 0 : return -EBADFD;
2805 : : }
2806 : : }
2807 : :
2808 : : /* increase the appl_ptr; returns the processed frames or a negative error */
2809 : 0 : static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2810 : : snd_pcm_uframes_t frames,
2811 : : snd_pcm_sframes_t avail)
2812 : : {
2813 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2814 : 0 : snd_pcm_sframes_t appl_ptr;
2815 : 0 : int ret;
2816 : :
2817 [ # # ]: 0 : if (avail <= 0)
2818 : : return 0;
2819 : 0 : if (frames > (snd_pcm_uframes_t)avail)
2820 : : frames = avail;
2821 : 0 : appl_ptr = runtime->control->appl_ptr + frames;
2822 [ # # ]: 0 : if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2823 : 0 : appl_ptr -= runtime->boundary;
2824 : 0 : ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2825 [ # # ]: 0 : return ret < 0 ? ret : frames;
2826 : : }
2827 : :
2828 : : /* decrease the appl_ptr; returns the processed frames or zero for error */
2829 : 0 : static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2830 : : snd_pcm_uframes_t frames,
2831 : : snd_pcm_sframes_t avail)
2832 : : {
2833 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2834 : 0 : snd_pcm_sframes_t appl_ptr;
2835 : 0 : int ret;
2836 : :
2837 [ # # ]: 0 : if (avail <= 0)
2838 : : return 0;
2839 : 0 : if (frames > (snd_pcm_uframes_t)avail)
2840 : : frames = avail;
2841 : 0 : appl_ptr = runtime->control->appl_ptr - frames;
2842 [ # # ]: 0 : if (appl_ptr < 0)
2843 : 0 : appl_ptr += runtime->boundary;
2844 : 0 : ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2845 : : /* NOTE: we return zero for errors because PulseAudio gets depressed
2846 : : * upon receiving an error from rewind ioctl and stops processing
2847 : : * any longer. Returning zero means that no rewind is done, so
2848 : : * it's not absolutely wrong to answer like that.
2849 : : */
2850 [ # # ]: 0 : return ret < 0 ? 0 : frames;
2851 : : }
2852 : :
2853 : 0 : static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2854 : : snd_pcm_uframes_t frames)
2855 : : {
2856 : 0 : snd_pcm_sframes_t ret;
2857 : :
2858 [ # # ]: 0 : if (frames == 0)
2859 : : return 0;
2860 : :
2861 : 0 : snd_pcm_stream_lock_irq(substream);
2862 : 0 : ret = do_pcm_hwsync(substream);
2863 [ # # ]: 0 : if (!ret)
2864 : 0 : ret = rewind_appl_ptr(substream, frames,
2865 : 0 : snd_pcm_hw_avail(substream));
2866 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2867 : : return ret;
2868 : : }
2869 : :
2870 : 0 : static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2871 : : snd_pcm_uframes_t frames)
2872 : : {
2873 : 0 : snd_pcm_sframes_t ret;
2874 : :
2875 [ # # ]: 0 : if (frames == 0)
2876 : : return 0;
2877 : :
2878 : 0 : snd_pcm_stream_lock_irq(substream);
2879 : 0 : ret = do_pcm_hwsync(substream);
2880 [ # # ]: 0 : if (!ret)
2881 : 0 : ret = forward_appl_ptr(substream, frames,
2882 : 0 : snd_pcm_avail(substream));
2883 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2884 : : return ret;
2885 : : }
2886 : :
2887 : 0 : static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2888 : : {
2889 : 0 : int err;
2890 : :
2891 : 0 : snd_pcm_stream_lock_irq(substream);
2892 : 0 : err = do_pcm_hwsync(substream);
2893 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2894 : 0 : return err;
2895 : : }
2896 : :
2897 : 0 : static int snd_pcm_delay(struct snd_pcm_substream *substream,
2898 : : snd_pcm_sframes_t *delay)
2899 : : {
2900 : 0 : int err;
2901 : 0 : snd_pcm_sframes_t n = 0;
2902 : :
2903 : 0 : snd_pcm_stream_lock_irq(substream);
2904 : 0 : err = do_pcm_hwsync(substream);
2905 [ # # ]: 0 : if (!err)
2906 : 0 : n = snd_pcm_calc_delay(substream);
2907 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2908 [ # # ]: 0 : if (!err)
2909 : 0 : *delay = n;
2910 : 0 : return err;
2911 : : }
2912 : :
2913 : 0 : static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2914 : : struct snd_pcm_sync_ptr __user *_sync_ptr)
2915 : : {
2916 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
2917 : 0 : struct snd_pcm_sync_ptr sync_ptr;
2918 : 0 : volatile struct snd_pcm_mmap_status *status;
2919 : 0 : volatile struct snd_pcm_mmap_control *control;
2920 : 0 : int err;
2921 : :
2922 : 0 : memset(&sync_ptr, 0, sizeof(sync_ptr));
2923 [ # # ]: 0 : if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2924 : : return -EFAULT;
2925 [ # # ]: 0 : if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2926 : : return -EFAULT;
2927 : 0 : status = runtime->status;
2928 : 0 : control = runtime->control;
2929 [ # # ]: 0 : if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2930 : 0 : err = snd_pcm_hwsync(substream);
2931 [ # # ]: 0 : if (err < 0)
2932 : : return err;
2933 : : }
2934 : 0 : snd_pcm_stream_lock_irq(substream);
2935 [ # # ]: 0 : if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2936 : 0 : err = pcm_lib_apply_appl_ptr(substream,
2937 : : sync_ptr.c.control.appl_ptr);
2938 [ # # ]: 0 : if (err < 0) {
2939 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2940 : 0 : return err;
2941 : : }
2942 : : } else {
2943 : 0 : sync_ptr.c.control.appl_ptr = control->appl_ptr;
2944 : : }
2945 [ # # ]: 0 : if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2946 : 0 : control->avail_min = sync_ptr.c.control.avail_min;
2947 : : else
2948 : 0 : sync_ptr.c.control.avail_min = control->avail_min;
2949 : 0 : sync_ptr.s.status.state = status->state;
2950 : 0 : sync_ptr.s.status.hw_ptr = status->hw_ptr;
2951 : 0 : sync_ptr.s.status.tstamp = status->tstamp;
2952 : 0 : sync_ptr.s.status.suspended_state = status->suspended_state;
2953 : 0 : sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
2954 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
2955 [ # # ]: 0 : if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2956 : 0 : return -EFAULT;
2957 : : return 0;
2958 : : }
2959 : :
2960 : : struct snd_pcm_mmap_status32 {
2961 : : snd_pcm_state_t state;
2962 : : s32 pad1;
2963 : : u32 hw_ptr;
2964 : : s32 tstamp_sec;
2965 : : s32 tstamp_nsec;
2966 : : snd_pcm_state_t suspended_state;
2967 : : s32 audio_tstamp_sec;
2968 : : s32 audio_tstamp_nsec;
2969 : : } __attribute__((packed));
2970 : :
2971 : : struct snd_pcm_mmap_control32 {
2972 : : u32 appl_ptr;
2973 : : u32 avail_min;
2974 : : };
2975 : :
2976 : : struct snd_pcm_sync_ptr32 {
2977 : : u32 flags;
2978 : : union {
2979 : : struct snd_pcm_mmap_status32 status;
2980 : : unsigned char reserved[64];
2981 : : } s;
2982 : : union {
2983 : : struct snd_pcm_mmap_control32 control;
2984 : : unsigned char reserved[64];
2985 : : } c;
2986 : : } __attribute__((packed));
2987 : :
2988 : : /* recalcuate the boundary within 32bit */
2989 : 0 : static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
2990 : : {
2991 : 0 : snd_pcm_uframes_t boundary;
2992 : :
2993 [ # # # # ]: 0 : if (! runtime->buffer_size)
2994 : : return 0;
2995 : : boundary = runtime->buffer_size;
2996 [ # # # # : 0 : while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
# # ]
2997 : : boundary *= 2;
2998 : : return boundary;
2999 : : }
3000 : :
3001 : 0 : static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
3002 : : struct snd_pcm_sync_ptr32 __user *src)
3003 : : {
3004 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
3005 : 0 : volatile struct snd_pcm_mmap_status *status;
3006 : 0 : volatile struct snd_pcm_mmap_control *control;
3007 : 0 : u32 sflags;
3008 : 0 : struct snd_pcm_mmap_control scontrol;
3009 : 0 : struct snd_pcm_mmap_status sstatus;
3010 : 0 : snd_pcm_uframes_t boundary;
3011 : 0 : int err;
3012 : :
3013 [ # # ]: 0 : if (snd_BUG_ON(!runtime))
3014 : : return -EINVAL;
3015 : :
3016 [ # # ]: 0 : if (get_user(sflags, &src->flags) ||
3017 [ # # ]: 0 : get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3018 [ # # ]: 0 : get_user(scontrol.avail_min, &src->c.control.avail_min))
3019 : 0 : return -EFAULT;
3020 [ # # ]: 0 : if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
3021 : 0 : err = snd_pcm_hwsync(substream);
3022 [ # # ]: 0 : if (err < 0)
3023 : : return err;
3024 : : }
3025 : 0 : status = runtime->status;
3026 : 0 : control = runtime->control;
3027 [ # # ]: 0 : boundary = recalculate_boundary(runtime);
3028 [ # # ]: 0 : if (! boundary)
3029 : 0 : boundary = 0x7fffffff;
3030 : 0 : snd_pcm_stream_lock_irq(substream);
3031 : : /* FIXME: we should consider the boundary for the sync from app */
3032 [ # # ]: 0 : if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
3033 : 0 : control->appl_ptr = scontrol.appl_ptr;
3034 : : else
3035 : 0 : scontrol.appl_ptr = control->appl_ptr % boundary;
3036 [ # # ]: 0 : if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
3037 : 0 : control->avail_min = scontrol.avail_min;
3038 : : else
3039 : 0 : scontrol.avail_min = control->avail_min;
3040 : 0 : sstatus.state = status->state;
3041 : 0 : sstatus.hw_ptr = status->hw_ptr % boundary;
3042 : 0 : sstatus.tstamp = status->tstamp;
3043 : 0 : sstatus.suspended_state = status->suspended_state;
3044 : 0 : sstatus.audio_tstamp = status->audio_tstamp;
3045 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
3046 [ # # ]: 0 : if (put_user(sstatus.state, &src->s.status.state) ||
3047 [ # # ]: 0 : put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
3048 [ # # ]: 0 : put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
3049 [ # # ]: 0 : put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
3050 [ # # ]: 0 : put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
3051 [ # # ]: 0 : put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
3052 [ # # ]: 0 : put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
3053 [ # # ]: 0 : put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3054 [ # # ]: 0 : put_user(scontrol.avail_min, &src->c.control.avail_min))
3055 : 0 : return -EFAULT;
3056 : :
3057 : : return 0;
3058 : : }
3059 : : #define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32)
3060 : :
3061 : 0 : static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
3062 : : {
3063 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
3064 : 0 : int arg;
3065 : :
3066 [ # # ]: 0 : if (get_user(arg, _arg))
3067 : : return -EFAULT;
3068 [ # # ]: 0 : if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
3069 : : return -EINVAL;
3070 : 0 : runtime->tstamp_type = arg;
3071 : 0 : return 0;
3072 : : }
3073 : :
3074 : 0 : static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
3075 : : struct snd_xferi __user *_xferi)
3076 : : {
3077 : 0 : struct snd_xferi xferi;
3078 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
3079 : 0 : snd_pcm_sframes_t result;
3080 : :
3081 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3082 : : return -EBADFD;
3083 [ # # ]: 0 : if (put_user(0, &_xferi->result))
3084 : : return -EFAULT;
3085 [ # # ]: 0 : if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
3086 : : return -EFAULT;
3087 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3088 : 0 : result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
3089 : : else
3090 : 0 : result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
3091 [ # # ]: 0 : __put_user(result, &_xferi->result);
3092 : 0 : return result < 0 ? result : 0;
3093 : : }
3094 : :
3095 : 0 : static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
3096 : : struct snd_xfern __user *_xfern)
3097 : : {
3098 : 0 : struct snd_xfern xfern;
3099 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
3100 : 0 : void *bufs;
3101 : 0 : snd_pcm_sframes_t result;
3102 : :
3103 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3104 : : return -EBADFD;
3105 [ # # ]: 0 : if (runtime->channels > 128)
3106 : : return -EINVAL;
3107 [ # # ]: 0 : if (put_user(0, &_xfern->result))
3108 : : return -EFAULT;
3109 [ # # ]: 0 : if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
3110 : : return -EFAULT;
3111 : :
3112 : 0 : bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
3113 [ # # ]: 0 : if (IS_ERR(bufs))
3114 : 0 : return PTR_ERR(bufs);
3115 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3116 : 0 : result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
3117 : : else
3118 : 0 : result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
3119 : 0 : kfree(bufs);
3120 [ # # ]: 0 : __put_user(result, &_xfern->result);
3121 : 0 : return result < 0 ? result : 0;
3122 : : }
3123 : :
3124 : 0 : static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
3125 : : snd_pcm_uframes_t __user *_frames)
3126 : : {
3127 : 0 : snd_pcm_uframes_t frames;
3128 : 0 : snd_pcm_sframes_t result;
3129 : :
3130 [ # # ]: 0 : if (get_user(frames, _frames))
3131 : : return -EFAULT;
3132 [ # # ]: 0 : if (put_user(0, _frames))
3133 : : return -EFAULT;
3134 : 0 : result = snd_pcm_rewind(substream, frames);
3135 [ # # ]: 0 : __put_user(result, _frames);
3136 : 0 : return result < 0 ? result : 0;
3137 : : }
3138 : :
3139 : 0 : static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
3140 : : snd_pcm_uframes_t __user *_frames)
3141 : : {
3142 : 0 : snd_pcm_uframes_t frames;
3143 : 0 : snd_pcm_sframes_t result;
3144 : :
3145 [ # # ]: 0 : if (get_user(frames, _frames))
3146 : : return -EFAULT;
3147 [ # # ]: 0 : if (put_user(0, _frames))
3148 : : return -EFAULT;
3149 : 0 : result = snd_pcm_forward(substream, frames);
3150 [ # # ]: 0 : __put_user(result, _frames);
3151 : 0 : return result < 0 ? result : 0;
3152 : : }
3153 : :
3154 : 0 : static int snd_pcm_common_ioctl(struct file *file,
3155 : : struct snd_pcm_substream *substream,
3156 : : unsigned int cmd, void __user *arg)
3157 : : {
3158 : 0 : struct snd_pcm_file *pcm_file = file->private_data;
3159 : 0 : int res;
3160 : :
3161 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3162 : : return -ENXIO;
3163 : :
3164 : 0 : res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
3165 [ # # ]: 0 : if (res < 0)
3166 : : return res;
3167 : :
3168 [ # # # # : 0 : switch (cmd) {
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
# # # # #
# ]
3169 : : case SNDRV_PCM_IOCTL_PVERSION:
3170 [ # # ]: 0 : return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
3171 : 0 : case SNDRV_PCM_IOCTL_INFO:
3172 : 0 : return snd_pcm_info_user(substream, arg);
3173 : : case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
3174 : : return 0;
3175 : 0 : case SNDRV_PCM_IOCTL_TTSTAMP:
3176 : 0 : return snd_pcm_tstamp(substream, arg);
3177 : : case SNDRV_PCM_IOCTL_USER_PVERSION:
3178 [ # # ]: 0 : if (get_user(pcm_file->user_pversion,
3179 : : (unsigned int __user *)arg))
3180 : 0 : return -EFAULT;
3181 : : return 0;
3182 : 0 : case SNDRV_PCM_IOCTL_HW_REFINE:
3183 : 0 : return snd_pcm_hw_refine_user(substream, arg);
3184 : 0 : case SNDRV_PCM_IOCTL_HW_PARAMS:
3185 : 0 : return snd_pcm_hw_params_user(substream, arg);
3186 : 0 : case SNDRV_PCM_IOCTL_HW_FREE:
3187 : 0 : return snd_pcm_hw_free(substream);
3188 : 0 : case SNDRV_PCM_IOCTL_SW_PARAMS:
3189 : 0 : return snd_pcm_sw_params_user(substream, arg);
3190 : 0 : case SNDRV_PCM_IOCTL_STATUS32:
3191 : 0 : return snd_pcm_status_user32(substream, arg, false);
3192 : 0 : case SNDRV_PCM_IOCTL_STATUS_EXT32:
3193 : 0 : return snd_pcm_status_user32(substream, arg, true);
3194 : 0 : case SNDRV_PCM_IOCTL_STATUS64:
3195 : 0 : return snd_pcm_status_user64(substream, arg, false);
3196 : 0 : case SNDRV_PCM_IOCTL_STATUS_EXT64:
3197 : 0 : return snd_pcm_status_user64(substream, arg, true);
3198 : 0 : case SNDRV_PCM_IOCTL_CHANNEL_INFO:
3199 : 0 : return snd_pcm_channel_info_user(substream, arg);
3200 : 0 : case SNDRV_PCM_IOCTL_PREPARE:
3201 : 0 : return snd_pcm_prepare(substream, file);
3202 : : case SNDRV_PCM_IOCTL_RESET:
3203 : 0 : return snd_pcm_reset(substream);
3204 : : case SNDRV_PCM_IOCTL_START:
3205 : 0 : return snd_pcm_start_lock_irq(substream);
3206 : 0 : case SNDRV_PCM_IOCTL_LINK:
3207 : 0 : return snd_pcm_link(substream, (int)(unsigned long) arg);
3208 : 0 : case SNDRV_PCM_IOCTL_UNLINK:
3209 : 0 : return snd_pcm_unlink(substream);
3210 : : case SNDRV_PCM_IOCTL_RESUME:
3211 : 0 : return snd_pcm_resume(substream);
3212 : 0 : case SNDRV_PCM_IOCTL_XRUN:
3213 : 0 : return snd_pcm_xrun(substream);
3214 : 0 : case SNDRV_PCM_IOCTL_HWSYNC:
3215 : 0 : return snd_pcm_hwsync(substream);
3216 : 0 : case SNDRV_PCM_IOCTL_DELAY:
3217 : : {
3218 : 0 : snd_pcm_sframes_t delay;
3219 : 0 : snd_pcm_sframes_t __user *res = arg;
3220 : 0 : int err;
3221 : :
3222 : 0 : err = snd_pcm_delay(substream, &delay);
3223 [ # # ]: 0 : if (err)
3224 : : return err;
3225 [ # # ]: 0 : if (put_user(delay, res))
3226 : 0 : return -EFAULT;
3227 : : return 0;
3228 : : }
3229 : 0 : case __SNDRV_PCM_IOCTL_SYNC_PTR32:
3230 : 0 : return snd_pcm_ioctl_sync_ptr_compat(substream, arg);
3231 : 0 : case __SNDRV_PCM_IOCTL_SYNC_PTR64:
3232 : 0 : return snd_pcm_sync_ptr(substream, arg);
3233 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
3234 : 0 : case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
3235 : 0 : return snd_pcm_hw_refine_old_user(substream, arg);
3236 : 0 : case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
3237 : 0 : return snd_pcm_hw_params_old_user(substream, arg);
3238 : : #endif
3239 : 0 : case SNDRV_PCM_IOCTL_DRAIN:
3240 : 0 : return snd_pcm_drain(substream, file);
3241 : 0 : case SNDRV_PCM_IOCTL_DROP:
3242 : 0 : return snd_pcm_drop(substream);
3243 : 0 : case SNDRV_PCM_IOCTL_PAUSE:
3244 : 0 : return snd_pcm_pause_lock_irq(substream, (unsigned long)arg);
3245 : 0 : case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
3246 : : case SNDRV_PCM_IOCTL_READI_FRAMES:
3247 : 0 : return snd_pcm_xferi_frames_ioctl(substream, arg);
3248 : 0 : case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
3249 : : case SNDRV_PCM_IOCTL_READN_FRAMES:
3250 : 0 : return snd_pcm_xfern_frames_ioctl(substream, arg);
3251 : 0 : case SNDRV_PCM_IOCTL_REWIND:
3252 : 0 : return snd_pcm_rewind_ioctl(substream, arg);
3253 : 0 : case SNDRV_PCM_IOCTL_FORWARD:
3254 : 0 : return snd_pcm_forward_ioctl(substream, arg);
3255 : : }
3256 : 0 : pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
3257 : 0 : return -ENOTTY;
3258 : : }
3259 : :
3260 : 0 : static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
3261 : : unsigned long arg)
3262 : : {
3263 : 0 : struct snd_pcm_file *pcm_file;
3264 : :
3265 : 0 : pcm_file = file->private_data;
3266 : :
3267 [ # # ]: 0 : if (((cmd >> 8) & 0xff) != 'A')
3268 : : return -ENOTTY;
3269 : :
3270 : 0 : return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
3271 : : (void __user *)arg);
3272 : : }
3273 : :
3274 : : /**
3275 : : * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
3276 : : * @substream: PCM substream
3277 : : * @cmd: IOCTL cmd
3278 : : * @arg: IOCTL argument
3279 : : *
3280 : : * The function is provided primarily for OSS layer and USB gadget drivers,
3281 : : * and it allows only the limited set of ioctls (hw_params, sw_params,
3282 : : * prepare, start, drain, drop, forward).
3283 : : */
3284 : 0 : int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3285 : : unsigned int cmd, void *arg)
3286 : : {
3287 : 0 : snd_pcm_uframes_t *frames = arg;
3288 : 0 : snd_pcm_sframes_t result;
3289 : :
3290 [ # # # # : 0 : switch (cmd) {
# # # #
# ]
3291 : 0 : case SNDRV_PCM_IOCTL_FORWARD:
3292 : : {
3293 : : /* provided only for OSS; capture-only and no value returned */
3294 [ # # ]: 0 : if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3295 : : return -EINVAL;
3296 : 0 : result = snd_pcm_forward(substream, *frames);
3297 : 0 : return result < 0 ? result : 0;
3298 : : }
3299 : 0 : case SNDRV_PCM_IOCTL_HW_PARAMS:
3300 : 0 : return snd_pcm_hw_params(substream, arg);
3301 : 0 : case SNDRV_PCM_IOCTL_SW_PARAMS:
3302 : 0 : return snd_pcm_sw_params(substream, arg);
3303 : 0 : case SNDRV_PCM_IOCTL_PREPARE:
3304 : 0 : return snd_pcm_prepare(substream, NULL);
3305 : : case SNDRV_PCM_IOCTL_START:
3306 : 0 : return snd_pcm_start_lock_irq(substream);
3307 : 0 : case SNDRV_PCM_IOCTL_DRAIN:
3308 : 0 : return snd_pcm_drain(substream, NULL);
3309 : 0 : case SNDRV_PCM_IOCTL_DROP:
3310 : 0 : return snd_pcm_drop(substream);
3311 : 0 : case SNDRV_PCM_IOCTL_DELAY:
3312 : 0 : return snd_pcm_delay(substream, frames);
3313 : : default:
3314 : : return -EINVAL;
3315 : : }
3316 : : }
3317 : : EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3318 : :
3319 : 0 : static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3320 : : loff_t * offset)
3321 : : {
3322 : 0 : struct snd_pcm_file *pcm_file;
3323 : 0 : struct snd_pcm_substream *substream;
3324 : 0 : struct snd_pcm_runtime *runtime;
3325 : 0 : snd_pcm_sframes_t result;
3326 : :
3327 : 0 : pcm_file = file->private_data;
3328 : 0 : substream = pcm_file->substream;
3329 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3330 : : return -ENXIO;
3331 : 0 : runtime = substream->runtime;
3332 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3333 : : return -EBADFD;
3334 [ # # ]: 0 : if (!frame_aligned(runtime, count))
3335 : : return -EINVAL;
3336 : 0 : count = bytes_to_frames(runtime, count);
3337 : 0 : result = snd_pcm_lib_read(substream, buf, count);
3338 [ # # ]: 0 : if (result > 0)
3339 : 0 : result = frames_to_bytes(runtime, result);
3340 : : return result;
3341 : : }
3342 : :
3343 : 0 : static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3344 : : size_t count, loff_t * offset)
3345 : : {
3346 : 0 : struct snd_pcm_file *pcm_file;
3347 : 0 : struct snd_pcm_substream *substream;
3348 : 0 : struct snd_pcm_runtime *runtime;
3349 : 0 : snd_pcm_sframes_t result;
3350 : :
3351 : 0 : pcm_file = file->private_data;
3352 : 0 : substream = pcm_file->substream;
3353 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3354 : : return -ENXIO;
3355 : 0 : runtime = substream->runtime;
3356 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3357 : : return -EBADFD;
3358 [ # # ]: 0 : if (!frame_aligned(runtime, count))
3359 : : return -EINVAL;
3360 : 0 : count = bytes_to_frames(runtime, count);
3361 : 0 : result = snd_pcm_lib_write(substream, buf, count);
3362 [ # # ]: 0 : if (result > 0)
3363 : 0 : result = frames_to_bytes(runtime, result);
3364 : : return result;
3365 : : }
3366 : :
3367 : 0 : static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
3368 : : {
3369 : 0 : struct snd_pcm_file *pcm_file;
3370 : 0 : struct snd_pcm_substream *substream;
3371 : 0 : struct snd_pcm_runtime *runtime;
3372 : 0 : snd_pcm_sframes_t result;
3373 : 0 : unsigned long i;
3374 : 0 : void __user **bufs;
3375 : 0 : snd_pcm_uframes_t frames;
3376 : :
3377 : 0 : pcm_file = iocb->ki_filp->private_data;
3378 : 0 : substream = pcm_file->substream;
3379 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3380 : : return -ENXIO;
3381 : 0 : runtime = substream->runtime;
3382 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3383 : : return -EBADFD;
3384 [ # # ]: 0 : if (!iter_is_iovec(to))
3385 : : return -EINVAL;
3386 [ # # # # ]: 0 : if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
3387 : : return -EINVAL;
3388 [ # # ]: 0 : if (!frame_aligned(runtime, to->iov->iov_len))
3389 : : return -EINVAL;
3390 : 0 : frames = bytes_to_samples(runtime, to->iov->iov_len);
3391 : 0 : bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
3392 [ # # ]: 0 : if (bufs == NULL)
3393 : : return -ENOMEM;
3394 [ # # ]: 0 : for (i = 0; i < to->nr_segs; ++i)
3395 : 0 : bufs[i] = to->iov[i].iov_base;
3396 : 0 : result = snd_pcm_lib_readv(substream, bufs, frames);
3397 [ # # ]: 0 : if (result > 0)
3398 : 0 : result = frames_to_bytes(runtime, result);
3399 : 0 : kfree(bufs);
3400 : 0 : return result;
3401 : : }
3402 : :
3403 : 0 : static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
3404 : : {
3405 : 0 : struct snd_pcm_file *pcm_file;
3406 : 0 : struct snd_pcm_substream *substream;
3407 : 0 : struct snd_pcm_runtime *runtime;
3408 : 0 : snd_pcm_sframes_t result;
3409 : 0 : unsigned long i;
3410 : 0 : void __user **bufs;
3411 : 0 : snd_pcm_uframes_t frames;
3412 : :
3413 : 0 : pcm_file = iocb->ki_filp->private_data;
3414 : 0 : substream = pcm_file->substream;
3415 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3416 : : return -ENXIO;
3417 : 0 : runtime = substream->runtime;
3418 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3419 : : return -EBADFD;
3420 [ # # ]: 0 : if (!iter_is_iovec(from))
3421 : : return -EINVAL;
3422 [ # # # # : 0 : if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
# # ]
3423 [ # # ]: 0 : !frame_aligned(runtime, from->iov->iov_len))
3424 : : return -EINVAL;
3425 : 0 : frames = bytes_to_samples(runtime, from->iov->iov_len);
3426 : 0 : bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
3427 [ # # ]: 0 : if (bufs == NULL)
3428 : : return -ENOMEM;
3429 [ # # ]: 0 : for (i = 0; i < from->nr_segs; ++i)
3430 : 0 : bufs[i] = from->iov[i].iov_base;
3431 : 0 : result = snd_pcm_lib_writev(substream, bufs, frames);
3432 [ # # ]: 0 : if (result > 0)
3433 : 0 : result = frames_to_bytes(runtime, result);
3434 : 0 : kfree(bufs);
3435 : 0 : return result;
3436 : : }
3437 : :
3438 : 0 : static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
3439 : : {
3440 : 0 : struct snd_pcm_file *pcm_file;
3441 : 0 : struct snd_pcm_substream *substream;
3442 : 0 : struct snd_pcm_runtime *runtime;
3443 : 0 : __poll_t mask, ok;
3444 : 0 : snd_pcm_uframes_t avail;
3445 : :
3446 : 0 : pcm_file = file->private_data;
3447 : :
3448 : 0 : substream = pcm_file->substream;
3449 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3450 : : ok = EPOLLOUT | EPOLLWRNORM;
3451 : : else
3452 : 0 : ok = EPOLLIN | EPOLLRDNORM;
3453 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3454 : 0 : return ok | EPOLLERR;
3455 : :
3456 : 0 : runtime = substream->runtime;
3457 [ # # ]: 0 : poll_wait(file, &runtime->sleep, wait);
3458 : :
3459 : 0 : mask = 0;
3460 : 0 : snd_pcm_stream_lock_irq(substream);
3461 : 0 : avail = snd_pcm_avail(substream);
3462 [ # # # ]: 0 : switch (runtime->status->state) {
3463 : 0 : case SNDRV_PCM_STATE_RUNNING:
3464 : : case SNDRV_PCM_STATE_PREPARED:
3465 : : case SNDRV_PCM_STATE_PAUSED:
3466 [ # # ]: 0 : if (avail >= runtime->control->avail_min)
3467 : 0 : mask = ok;
3468 : : break;
3469 : 0 : case SNDRV_PCM_STATE_DRAINING:
3470 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3471 : 0 : mask = ok;
3472 [ # # ]: 0 : if (!avail)
3473 : 0 : mask |= EPOLLERR;
3474 : : }
3475 : : break;
3476 : 0 : default:
3477 : 0 : mask = ok | EPOLLERR;
3478 : 0 : break;
3479 : : }
3480 [ # # ]: 0 : snd_pcm_stream_unlock_irq(substream);
3481 : : return mask;
3482 : : }
3483 : :
3484 : : /*
3485 : : * mmap support
3486 : : */
3487 : :
3488 : : /*
3489 : : * Only on coherent architectures, we can mmap the status and the control records
3490 : : * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3491 : : */
3492 : : #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3493 : : /*
3494 : : * mmap status record
3495 : : */
3496 : 0 : static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
3497 : : {
3498 : 0 : struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3499 : 0 : struct snd_pcm_runtime *runtime;
3500 : :
3501 [ # # ]: 0 : if (substream == NULL)
3502 : : return VM_FAULT_SIGBUS;
3503 : 0 : runtime = substream->runtime;
3504 [ # # ]: 0 : vmf->page = virt_to_page(runtime->status);
3505 [ # # ]: 0 : get_page(vmf->page);
3506 : 0 : return 0;
3507 : : }
3508 : :
3509 : : static const struct vm_operations_struct snd_pcm_vm_ops_status =
3510 : : {
3511 : : .fault = snd_pcm_mmap_status_fault,
3512 : : };
3513 : :
3514 : 0 : static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3515 : : struct vm_area_struct *area)
3516 : : {
3517 : 0 : long size;
3518 : 0 : if (!(area->vm_flags & VM_READ))
3519 : : return -EINVAL;
3520 : 0 : size = area->vm_end - area->vm_start;
3521 [ # # ]: 0 : if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3522 : : return -EINVAL;
3523 : 0 : area->vm_ops = &snd_pcm_vm_ops_status;
3524 : 0 : area->vm_private_data = substream;
3525 : 0 : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3526 : 0 : return 0;
3527 : : }
3528 : :
3529 : : /*
3530 : : * mmap control record
3531 : : */
3532 : 0 : static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
3533 : : {
3534 : 0 : struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3535 : 0 : struct snd_pcm_runtime *runtime;
3536 : :
3537 [ # # ]: 0 : if (substream == NULL)
3538 : : return VM_FAULT_SIGBUS;
3539 : 0 : runtime = substream->runtime;
3540 [ # # ]: 0 : vmf->page = virt_to_page(runtime->control);
3541 [ # # ]: 0 : get_page(vmf->page);
3542 : 0 : return 0;
3543 : : }
3544 : :
3545 : : static const struct vm_operations_struct snd_pcm_vm_ops_control =
3546 : : {
3547 : : .fault = snd_pcm_mmap_control_fault,
3548 : : };
3549 : :
3550 : 0 : static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3551 : : struct vm_area_struct *area)
3552 : : {
3553 : 0 : long size;
3554 : 0 : if (!(area->vm_flags & VM_READ))
3555 : : return -EINVAL;
3556 : 0 : size = area->vm_end - area->vm_start;
3557 [ # # ]: 0 : if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3558 : : return -EINVAL;
3559 : 0 : area->vm_ops = &snd_pcm_vm_ops_control;
3560 : 0 : area->vm_private_data = substream;
3561 : 0 : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3562 : 0 : return 0;
3563 : : }
3564 : :
3565 : 0 : static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3566 : : {
3567 : : /* See pcm_control_mmap_allowed() below.
3568 : : * Since older alsa-lib requires both status and control mmaps to be
3569 : : * coupled, we have to disable the status mmap for old alsa-lib, too.
3570 : : */
3571 : 0 : if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3572 [ # # ]: 0 : (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3573 : : return false;
3574 : : return true;
3575 : : }
3576 : :
3577 : 0 : static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3578 : : {
3579 : 0 : if (pcm_file->no_compat_mmap)
3580 : : return false;
3581 : : /* Disallow the control mmap when SYNC_APPLPTR flag is set;
3582 : : * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3583 : : * thus it effectively assures the manual update of appl_ptr.
3584 : : */
3585 [ # # ]: 0 : if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3586 : : return false;
3587 : : return true;
3588 : : }
3589 : :
3590 : : #else /* ! coherent mmap */
3591 : : /*
3592 : : * don't support mmap for status and control records.
3593 : : */
3594 : : #define pcm_status_mmap_allowed(pcm_file) false
3595 : : #define pcm_control_mmap_allowed(pcm_file) false
3596 : :
3597 : : static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3598 : : struct vm_area_struct *area)
3599 : : {
3600 : : return -ENXIO;
3601 : : }
3602 : : static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3603 : : struct vm_area_struct *area)
3604 : : {
3605 : : return -ENXIO;
3606 : : }
3607 : : #endif /* coherent mmap */
3608 : :
3609 : : static inline struct page *
3610 : 0 : snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3611 : : {
3612 : 0 : void *vaddr = substream->runtime->dma_area + ofs;
3613 : :
3614 [ # # # ]: 0 : switch (substream->dma_buffer.dev.type) {
3615 : : #ifdef CONFIG_SND_DMA_SGBUF
3616 : 0 : case SNDRV_DMA_TYPE_DEV_SG:
3617 : : case SNDRV_DMA_TYPE_DEV_UC_SG:
3618 : 0 : return snd_pcm_sgbuf_ops_page(substream, ofs);
3619 : : #endif /* CONFIG_SND_DMA_SGBUF */
3620 : 0 : case SNDRV_DMA_TYPE_VMALLOC:
3621 : 0 : return vmalloc_to_page(vaddr);
3622 : 0 : default:
3623 [ # # ]: 0 : return virt_to_page(vaddr);
3624 : : }
3625 : : }
3626 : :
3627 : : /*
3628 : : * fault callback for mmapping a RAM page
3629 : : */
3630 : 0 : static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
3631 : : {
3632 : 0 : struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3633 : 0 : struct snd_pcm_runtime *runtime;
3634 : 0 : unsigned long offset;
3635 : 0 : struct page * page;
3636 : 0 : size_t dma_bytes;
3637 : :
3638 [ # # ]: 0 : if (substream == NULL)
3639 : : return VM_FAULT_SIGBUS;
3640 : 0 : runtime = substream->runtime;
3641 : 0 : offset = vmf->pgoff << PAGE_SHIFT;
3642 : 0 : dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3643 [ # # ]: 0 : if (offset > dma_bytes - PAGE_SIZE)
3644 : : return VM_FAULT_SIGBUS;
3645 [ # # ]: 0 : if (substream->ops->page)
3646 : 0 : page = substream->ops->page(substream, offset);
3647 : : else
3648 : 0 : page = snd_pcm_default_page_ops(substream, offset);
3649 [ # # ]: 0 : if (!page)
3650 : : return VM_FAULT_SIGBUS;
3651 [ # # ]: 0 : get_page(page);
3652 : 0 : vmf->page = page;
3653 : 0 : return 0;
3654 : : }
3655 : :
3656 : : static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3657 : : .open = snd_pcm_mmap_data_open,
3658 : : .close = snd_pcm_mmap_data_close,
3659 : : };
3660 : :
3661 : : static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3662 : : .open = snd_pcm_mmap_data_open,
3663 : : .close = snd_pcm_mmap_data_close,
3664 : : .fault = snd_pcm_mmap_data_fault,
3665 : : };
3666 : :
3667 : : /*
3668 : : * mmap the DMA buffer on RAM
3669 : : */
3670 : :
3671 : : /**
3672 : : * snd_pcm_lib_default_mmap - Default PCM data mmap function
3673 : : * @substream: PCM substream
3674 : : * @area: VMA
3675 : : *
3676 : : * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3677 : : * this function is invoked implicitly.
3678 : : */
3679 : 0 : int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3680 : : struct vm_area_struct *area)
3681 : : {
3682 : 0 : area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3683 : : #ifdef CONFIG_GENERIC_ALLOCATOR
3684 [ # # ]: 0 : if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3685 : 0 : area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3686 : 0 : return remap_pfn_range(area, area->vm_start,
3687 : 0 : substream->dma_buffer.addr >> PAGE_SHIFT,
3688 : 0 : area->vm_end - area->vm_start, area->vm_page_prot);
3689 : : }
3690 : : #endif /* CONFIG_GENERIC_ALLOCATOR */
3691 : : #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3692 : : if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
3693 : : (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV ||
3694 : : substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_UC))
3695 : : return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3696 : : area,
3697 : : substream->runtime->dma_area,
3698 : : substream->runtime->dma_addr,
3699 : : substream->runtime->dma_bytes);
3700 : : #endif /* CONFIG_X86 */
3701 : : /* mmap with fault handler */
3702 : 0 : area->vm_ops = &snd_pcm_vm_ops_data_fault;
3703 : 0 : return 0;
3704 : : }
3705 : : EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3706 : :
3707 : : /*
3708 : : * mmap the DMA buffer on I/O memory area
3709 : : */
3710 : : #if SNDRV_PCM_INFO_MMAP_IOMEM
3711 : : /**
3712 : : * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3713 : : * @substream: PCM substream
3714 : : * @area: VMA
3715 : : *
3716 : : * When your hardware uses the iomapped pages as the hardware buffer and
3717 : : * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3718 : : * is supposed to work only on limited architectures.
3719 : : */
3720 : 0 : int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3721 : : struct vm_area_struct *area)
3722 : : {
3723 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
3724 : :
3725 [ # # ]: 0 : area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3726 : 0 : return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3727 : : }
3728 : : EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3729 : : #endif /* SNDRV_PCM_INFO_MMAP */
3730 : :
3731 : : /*
3732 : : * mmap DMA buffer
3733 : : */
3734 : 0 : int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3735 : : struct vm_area_struct *area)
3736 : : {
3737 : 0 : struct snd_pcm_runtime *runtime;
3738 : 0 : long size;
3739 : 0 : unsigned long offset;
3740 : 0 : size_t dma_bytes;
3741 : 0 : int err;
3742 : :
3743 [ # # ]: 0 : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3744 [ # # ]: 0 : if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3745 : : return -EINVAL;
3746 : : } else {
3747 [ # # ]: 0 : if (!(area->vm_flags & VM_READ))
3748 : : return -EINVAL;
3749 : : }
3750 : 0 : runtime = substream->runtime;
3751 [ # # ]: 0 : if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3752 : : return -EBADFD;
3753 [ # # ]: 0 : if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3754 : : return -ENXIO;
3755 [ # # ]: 0 : if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3756 : : runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3757 : : return -EINVAL;
3758 : 0 : size = area->vm_end - area->vm_start;
3759 : 0 : offset = area->vm_pgoff << PAGE_SHIFT;
3760 : 0 : dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3761 [ # # ]: 0 : if ((size_t)size > dma_bytes)
3762 : : return -EINVAL;
3763 [ # # ]: 0 : if (offset > dma_bytes - size)
3764 : : return -EINVAL;
3765 : :
3766 : 0 : area->vm_ops = &snd_pcm_vm_ops_data;
3767 : 0 : area->vm_private_data = substream;
3768 [ # # ]: 0 : if (substream->ops->mmap)
3769 : 0 : err = substream->ops->mmap(substream, area);
3770 : : else
3771 : 0 : err = snd_pcm_lib_default_mmap(substream, area);
3772 [ # # ]: 0 : if (!err)
3773 : 0 : atomic_inc(&substream->mmap_count);
3774 : : return err;
3775 : : }
3776 : : EXPORT_SYMBOL(snd_pcm_mmap_data);
3777 : :
3778 : 0 : static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3779 : : {
3780 : 0 : struct snd_pcm_file * pcm_file;
3781 : 0 : struct snd_pcm_substream *substream;
3782 : 0 : unsigned long offset;
3783 : :
3784 : 0 : pcm_file = file->private_data;
3785 : 0 : substream = pcm_file->substream;
3786 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3787 : : return -ENXIO;
3788 : :
3789 : 0 : offset = area->vm_pgoff << PAGE_SHIFT;
3790 [ # # # # : 0 : switch (offset) {
# ]
3791 : 0 : case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD:
3792 [ # # ]: 0 : if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3793 : : return -ENXIO;
3794 : : /* fallthrough */
3795 : : case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
3796 [ # # ]: 0 : if (!pcm_status_mmap_allowed(pcm_file))
3797 : : return -ENXIO;
3798 [ # # ]: 0 : return snd_pcm_mmap_status(substream, file, area);
3799 : 0 : case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD:
3800 [ # # ]: 0 : if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3801 : : return -ENXIO;
3802 : : /* fallthrough */
3803 : : case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
3804 [ # # ]: 0 : if (!pcm_control_mmap_allowed(pcm_file))
3805 : : return -ENXIO;
3806 [ # # ]: 0 : return snd_pcm_mmap_control(substream, file, area);
3807 : 0 : default:
3808 : 0 : return snd_pcm_mmap_data(substream, file, area);
3809 : : }
3810 : : return 0;
3811 : : }
3812 : :
3813 : 0 : static int snd_pcm_fasync(int fd, struct file * file, int on)
3814 : : {
3815 : 0 : struct snd_pcm_file * pcm_file;
3816 : 0 : struct snd_pcm_substream *substream;
3817 : 0 : struct snd_pcm_runtime *runtime;
3818 : :
3819 : 0 : pcm_file = file->private_data;
3820 : 0 : substream = pcm_file->substream;
3821 [ # # # # : 0 : if (PCM_RUNTIME_CHECK(substream))
# # ]
3822 : : return -ENXIO;
3823 : 0 : runtime = substream->runtime;
3824 : 0 : return fasync_helper(fd, file, on, &runtime->fasync);
3825 : : }
3826 : :
3827 : : /*
3828 : : * ioctl32 compat
3829 : : */
3830 : : #ifdef CONFIG_COMPAT
3831 : : #include "pcm_compat.c"
3832 : : #else
3833 : : #define snd_pcm_ioctl_compat NULL
3834 : : #endif
3835 : :
3836 : : /*
3837 : : * To be removed helpers to keep binary compatibility
3838 : : */
3839 : :
3840 : : #ifdef CONFIG_SND_SUPPORT_OLD_API
3841 : : #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3842 : : #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3843 : :
3844 : 0 : static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3845 : : struct snd_pcm_hw_params_old *oparams)
3846 : : {
3847 : 0 : unsigned int i;
3848 : :
3849 : 0 : memset(params, 0, sizeof(*params));
3850 : 0 : params->flags = oparams->flags;
3851 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3852 : 0 : params->masks[i].bits[0] = oparams->masks[i];
3853 : 0 : memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3854 : 0 : params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3855 : 0 : params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3856 : 0 : params->info = oparams->info;
3857 : 0 : params->msbits = oparams->msbits;
3858 : 0 : params->rate_num = oparams->rate_num;
3859 : 0 : params->rate_den = oparams->rate_den;
3860 : 0 : params->fifo_size = oparams->fifo_size;
3861 : 0 : }
3862 : :
3863 : 0 : static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3864 : : struct snd_pcm_hw_params *params)
3865 : : {
3866 : 0 : unsigned int i;
3867 : :
3868 : 0 : memset(oparams, 0, sizeof(*oparams));
3869 : 0 : oparams->flags = params->flags;
3870 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3871 : 0 : oparams->masks[i] = params->masks[i].bits[0];
3872 : 0 : memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3873 : 0 : oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3874 : 0 : oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3875 : 0 : oparams->info = params->info;
3876 : 0 : oparams->msbits = params->msbits;
3877 : 0 : oparams->rate_num = params->rate_num;
3878 : 0 : oparams->rate_den = params->rate_den;
3879 : 0 : oparams->fifo_size = params->fifo_size;
3880 : 0 : }
3881 : :
3882 : 0 : static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3883 : : struct snd_pcm_hw_params_old __user * _oparams)
3884 : : {
3885 : 0 : struct snd_pcm_hw_params *params;
3886 : 0 : struct snd_pcm_hw_params_old *oparams = NULL;
3887 : 0 : int err;
3888 : :
3889 : 0 : params = kmalloc(sizeof(*params), GFP_KERNEL);
3890 [ # # ]: 0 : if (!params)
3891 : : return -ENOMEM;
3892 : :
3893 : 0 : oparams = memdup_user(_oparams, sizeof(*oparams));
3894 [ # # ]: 0 : if (IS_ERR(oparams)) {
3895 : 0 : err = PTR_ERR(oparams);
3896 : 0 : goto out;
3897 : : }
3898 : 0 : snd_pcm_hw_convert_from_old_params(params, oparams);
3899 : 0 : err = snd_pcm_hw_refine(substream, params);
3900 [ # # ]: 0 : if (err < 0)
3901 : 0 : goto out_old;
3902 : :
3903 : 0 : err = fixup_unreferenced_params(substream, params);
3904 [ # # ]: 0 : if (err < 0)
3905 : 0 : goto out_old;
3906 : :
3907 : 0 : snd_pcm_hw_convert_to_old_params(oparams, params);
3908 [ # # # # ]: 0 : if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3909 : : err = -EFAULT;
3910 : 0 : out_old:
3911 : 0 : kfree(oparams);
3912 : 0 : out:
3913 : 0 : kfree(params);
3914 : 0 : return err;
3915 : : }
3916 : :
3917 : 0 : static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3918 : : struct snd_pcm_hw_params_old __user * _oparams)
3919 : : {
3920 : 0 : struct snd_pcm_hw_params *params;
3921 : 0 : struct snd_pcm_hw_params_old *oparams = NULL;
3922 : 0 : int err;
3923 : :
3924 : 0 : params = kmalloc(sizeof(*params), GFP_KERNEL);
3925 [ # # ]: 0 : if (!params)
3926 : : return -ENOMEM;
3927 : :
3928 : 0 : oparams = memdup_user(_oparams, sizeof(*oparams));
3929 [ # # ]: 0 : if (IS_ERR(oparams)) {
3930 : 0 : err = PTR_ERR(oparams);
3931 : 0 : goto out;
3932 : : }
3933 : :
3934 : 0 : snd_pcm_hw_convert_from_old_params(params, oparams);
3935 : 0 : err = snd_pcm_hw_params(substream, params);
3936 [ # # ]: 0 : if (err < 0)
3937 : 0 : goto out_old;
3938 : :
3939 : 0 : snd_pcm_hw_convert_to_old_params(oparams, params);
3940 [ # # # # ]: 0 : if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3941 : : err = -EFAULT;
3942 : 0 : out_old:
3943 : 0 : kfree(oparams);
3944 : 0 : out:
3945 : 0 : kfree(params);
3946 : 0 : return err;
3947 : : }
3948 : : #endif /* CONFIG_SND_SUPPORT_OLD_API */
3949 : :
3950 : : #ifndef CONFIG_MMU
3951 : : static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3952 : : unsigned long addr,
3953 : : unsigned long len,
3954 : : unsigned long pgoff,
3955 : : unsigned long flags)
3956 : : {
3957 : : struct snd_pcm_file *pcm_file = file->private_data;
3958 : : struct snd_pcm_substream *substream = pcm_file->substream;
3959 : : struct snd_pcm_runtime *runtime = substream->runtime;
3960 : : unsigned long offset = pgoff << PAGE_SHIFT;
3961 : :
3962 : : switch (offset) {
3963 : : case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
3964 : : return (unsigned long)runtime->status;
3965 : : case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
3966 : : return (unsigned long)runtime->control;
3967 : : default:
3968 : : return (unsigned long)runtime->dma_area + offset;
3969 : : }
3970 : : }
3971 : : #else
3972 : : # define snd_pcm_get_unmapped_area NULL
3973 : : #endif
3974 : :
3975 : : /*
3976 : : * Register section
3977 : : */
3978 : :
3979 : : const struct file_operations snd_pcm_f_ops[2] = {
3980 : : {
3981 : : .owner = THIS_MODULE,
3982 : : .write = snd_pcm_write,
3983 : : .write_iter = snd_pcm_writev,
3984 : : .open = snd_pcm_playback_open,
3985 : : .release = snd_pcm_release,
3986 : : .llseek = no_llseek,
3987 : : .poll = snd_pcm_poll,
3988 : : .unlocked_ioctl = snd_pcm_ioctl,
3989 : : .compat_ioctl = snd_pcm_ioctl_compat,
3990 : : .mmap = snd_pcm_mmap,
3991 : : .fasync = snd_pcm_fasync,
3992 : : .get_unmapped_area = snd_pcm_get_unmapped_area,
3993 : : },
3994 : : {
3995 : : .owner = THIS_MODULE,
3996 : : .read = snd_pcm_read,
3997 : : .read_iter = snd_pcm_readv,
3998 : : .open = snd_pcm_capture_open,
3999 : : .release = snd_pcm_release,
4000 : : .llseek = no_llseek,
4001 : : .poll = snd_pcm_poll,
4002 : : .unlocked_ioctl = snd_pcm_ioctl,
4003 : : .compat_ioctl = snd_pcm_ioctl_compat,
4004 : : .mmap = snd_pcm_mmap,
4005 : : .fasync = snd_pcm_fasync,
4006 : : .get_unmapped_area = snd_pcm_get_unmapped_area,
4007 : : }
4008 : : };
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