2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/sched/signal.h>
27 #include <linux/time.h>
28 #include <linux/pm_qos.h>
30 #include <linux/dma-mapping.h>
31 #include <sound/core.h>
32 #include <sound/control.h>
33 #include <sound/info.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/timer.h>
37 #include <sound/minors.h>
38 #include <linux/uio.h>
40 #include "pcm_local.h"
42 #ifdef CONFIG_SND_DEBUG
43 #define CREATE_TRACE_POINTS
44 #include "pcm_param_trace.h"
46 #define trace_hw_mask_param_enabled() 0
47 #define trace_hw_interval_param_enabled() 0
48 #define trace_hw_mask_param(substream, type, index, prev, curr)
49 #define trace_hw_interval_param(substream, type, index, prev, curr)
56 struct snd_pcm_hw_params_old {
58 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
59 SNDRV_PCM_HW_PARAM_ACCESS + 1];
60 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
61 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
66 unsigned int rate_num;
67 unsigned int rate_den;
68 snd_pcm_uframes_t fifo_size;
69 unsigned char reserved[64];
72 #ifdef CONFIG_SND_SUPPORT_OLD_API
73 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
74 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
76 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
77 struct snd_pcm_hw_params_old __user * _oparams);
78 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
79 struct snd_pcm_hw_params_old __user * _oparams);
81 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
87 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
88 static DECLARE_RWSEM(snd_pcm_link_rwsem);
90 /* Writer in rwsem may block readers even during its waiting in queue,
91 * and this may lead to a deadlock when the code path takes read sem
92 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
93 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
94 * spin until it gets the lock.
96 static inline void down_write_nonblock(struct rw_semaphore *lock)
98 while (!down_write_trylock(lock))
103 * snd_pcm_stream_lock - Lock the PCM stream
104 * @substream: PCM substream
106 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
107 * flag of the given substream. This also takes the global link rw lock
108 * (or rw sem), too, for avoiding the race with linked streams.
110 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
112 if (substream->pcm->nonatomic) {
113 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
114 mutex_lock(&substream->self_group.mutex);
116 read_lock(&snd_pcm_link_rwlock);
117 spin_lock(&substream->self_group.lock);
120 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
123 * snd_pcm_stream_lock - Unlock the PCM stream
124 * @substream: PCM substream
126 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
128 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
130 if (substream->pcm->nonatomic) {
131 mutex_unlock(&substream->self_group.mutex);
132 up_read(&snd_pcm_link_rwsem);
134 spin_unlock(&substream->self_group.lock);
135 read_unlock(&snd_pcm_link_rwlock);
138 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
141 * snd_pcm_stream_lock_irq - Lock the PCM stream
142 * @substream: PCM substream
144 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
145 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
146 * as snd_pcm_stream_lock().
148 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
150 if (!substream->pcm->nonatomic)
152 snd_pcm_stream_lock(substream);
154 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
157 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
158 * @substream: PCM substream
160 * This is a counter-part of snd_pcm_stream_lock_irq().
162 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
164 snd_pcm_stream_unlock(substream);
165 if (!substream->pcm->nonatomic)
168 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
170 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
172 unsigned long flags = 0;
173 if (!substream->pcm->nonatomic)
174 local_irq_save(flags);
175 snd_pcm_stream_lock(substream);
178 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
181 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
182 * @substream: PCM substream
185 * This is a counter-part of snd_pcm_stream_lock_irqsave().
187 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
190 snd_pcm_stream_unlock(substream);
191 if (!substream->pcm->nonatomic)
192 local_irq_restore(flags);
194 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
196 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
198 struct snd_pcm_runtime *runtime;
199 struct snd_pcm *pcm = substream->pcm;
200 struct snd_pcm_str *pstr = substream->pstr;
202 memset(info, 0, sizeof(*info));
203 info->card = pcm->card->number;
204 info->device = pcm->device;
205 info->stream = substream->stream;
206 info->subdevice = substream->number;
207 strlcpy(info->id, pcm->id, sizeof(info->id));
208 strlcpy(info->name, pcm->name, sizeof(info->name));
209 info->dev_class = pcm->dev_class;
210 info->dev_subclass = pcm->dev_subclass;
211 info->subdevices_count = pstr->substream_count;
212 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
213 strlcpy(info->subname, substream->name, sizeof(info->subname));
214 runtime = substream->runtime;
219 int snd_pcm_info_user(struct snd_pcm_substream *substream,
220 struct snd_pcm_info __user * _info)
222 struct snd_pcm_info *info;
225 info = kmalloc(sizeof(*info), GFP_KERNEL);
228 err = snd_pcm_info(substream, info);
230 if (copy_to_user(_info, info, sizeof(*info)))
237 static bool hw_support_mmap(struct snd_pcm_substream *substream)
239 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
241 /* check architectures that return -EINVAL from dma_mmap_coherent() */
242 /* FIXME: this should be some global flag */
243 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
244 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
245 if (!substream->ops->mmap &&
246 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
252 static int constrain_mask_params(struct snd_pcm_substream *substream,
253 struct snd_pcm_hw_params *params)
255 struct snd_pcm_hw_constraints *constrs =
256 &substream->runtime->hw_constraints;
259 struct snd_mask old_mask;
262 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
263 m = hw_param_mask(params, k);
264 if (snd_mask_empty(m))
267 /* This parameter is not requested to change by a caller. */
268 if (!(params->rmask & (1 << k)))
271 if (trace_hw_mask_param_enabled())
274 changed = snd_mask_refine(m, constrs_mask(constrs, k));
280 /* Set corresponding flag so that the caller gets it. */
281 trace_hw_mask_param(substream, k, 0, &old_mask, m);
282 params->cmask |= 1 << k;
288 static int constrain_interval_params(struct snd_pcm_substream *substream,
289 struct snd_pcm_hw_params *params)
291 struct snd_pcm_hw_constraints *constrs =
292 &substream->runtime->hw_constraints;
293 struct snd_interval *i;
295 struct snd_interval old_interval;
298 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
299 i = hw_param_interval(params, k);
300 if (snd_interval_empty(i))
303 /* This parameter is not requested to change by a caller. */
304 if (!(params->rmask & (1 << k)))
307 if (trace_hw_interval_param_enabled())
310 changed = snd_interval_refine(i, constrs_interval(constrs, k));
316 /* Set corresponding flag so that the caller gets it. */
317 trace_hw_interval_param(substream, k, 0, &old_interval, i);
318 params->cmask |= 1 << k;
324 static int constrain_params_by_rules(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params *params)
327 struct snd_pcm_hw_constraints *constrs =
328 &substream->runtime->hw_constraints;
330 unsigned int rstamps[constrs->rules_num];
331 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
333 struct snd_pcm_hw_rule *r;
335 struct snd_mask old_mask;
336 struct snd_interval old_interval;
341 * Each application of rule has own sequence number.
343 * Each member of 'rstamps' array represents the sequence number of
344 * recent application of corresponding rule.
346 for (k = 0; k < constrs->rules_num; k++)
350 * Each member of 'vstamps' array represents the sequence number of
351 * recent application of rule in which corresponding parameters were
354 * In initial state, elements corresponding to parameters requested by
355 * a caller is 1. For unrequested parameters, corresponding members
356 * have 0 so that the parameters are never changed anymore.
358 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
359 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
361 /* Due to the above design, actual sequence number starts at 2. */
364 /* Apply all rules in order. */
366 for (k = 0; k < constrs->rules_num; k++) {
367 r = &constrs->rules[k];
370 * Check condition bits of this rule. When the rule has
371 * some condition bits, parameter without the bits is
372 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
373 * is an example of the condition bits.
375 if (r->cond && !(r->cond & params->flags))
379 * The 'deps' array includes maximum three dependencies
380 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
381 * member of this array is a sentinel and should be
384 * This rule should be processed in this time when dependent
385 * parameters were changed at former applications of the other
388 for (d = 0; r->deps[d] >= 0; d++) {
389 if (vstamps[r->deps[d]] > rstamps[k])
395 if (trace_hw_mask_param_enabled()) {
396 if (hw_is_mask(r->var))
397 old_mask = *hw_param_mask(params, r->var);
399 if (trace_hw_interval_param_enabled()) {
400 if (hw_is_interval(r->var))
401 old_interval = *hw_param_interval(params, r->var);
404 changed = r->func(params, r);
409 * When the parameter is changed, notify it to the caller
410 * by corresponding returned bit, then preparing for next
413 if (changed && r->var >= 0) {
414 if (hw_is_mask(r->var)) {
415 trace_hw_mask_param(substream, r->var,
417 hw_param_mask(params, r->var));
419 if (hw_is_interval(r->var)) {
420 trace_hw_interval_param(substream, r->var,
421 k + 1, &old_interval,
422 hw_param_interval(params, r->var));
425 params->cmask |= (1 << r->var);
426 vstamps[r->var] = stamp;
430 rstamps[k] = stamp++;
433 /* Iterate to evaluate all rules till no parameters are changed. */
440 static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
441 struct snd_pcm_hw_params *params)
443 const struct snd_interval *i;
444 const struct snd_mask *m;
447 if (!params->msbits) {
448 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
449 if (snd_interval_single(i))
450 params->msbits = snd_interval_value(i);
453 if (!params->rate_den) {
454 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
455 if (snd_interval_single(i)) {
456 params->rate_num = snd_interval_value(i);
457 params->rate_den = 1;
461 if (!params->fifo_size) {
462 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
463 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
464 if (snd_mask_single(m) && snd_interval_single(i)) {
465 err = substream->ops->ioctl(substream,
466 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
473 params->info = substream->runtime->hw.info;
474 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
475 SNDRV_PCM_INFO_DRAIN_TRIGGER);
476 if (!hw_support_mmap(substream))
477 params->info &= ~(SNDRV_PCM_INFO_MMAP |
478 SNDRV_PCM_INFO_MMAP_VALID);
484 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
485 struct snd_pcm_hw_params *params)
490 params->fifo_size = 0;
491 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
493 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
494 params->rate_num = 0;
495 params->rate_den = 0;
498 err = constrain_mask_params(substream, params);
502 err = constrain_interval_params(substream, params);
506 err = constrain_params_by_rules(substream, params);
514 EXPORT_SYMBOL(snd_pcm_hw_refine);
516 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
517 struct snd_pcm_hw_params __user * _params)
519 struct snd_pcm_hw_params *params;
522 params = memdup_user(_params, sizeof(*params));
524 return PTR_ERR(params);
526 err = snd_pcm_hw_refine(substream, params);
530 err = fixup_unreferenced_params(substream, params);
534 if (copy_to_user(_params, params, sizeof(*params)))
541 static int period_to_usecs(struct snd_pcm_runtime *runtime)
546 return -1; /* invalid */
548 /* take 75% of period time as the deadline */
549 usecs = (750000 / runtime->rate) * runtime->period_size;
550 usecs += ((750000 % runtime->rate) * runtime->period_size) /
556 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
558 snd_pcm_stream_lock_irq(substream);
559 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
560 substream->runtime->status->state = state;
561 snd_pcm_stream_unlock_irq(substream);
564 static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
567 #ifdef CONFIG_SND_PCM_TIMER
568 if (substream->timer)
569 snd_timer_notify(substream->timer, event,
570 &substream->runtime->trigger_tstamp);
575 * snd_pcm_hw_param_choose - choose a configuration defined by @params
577 * @params: the hw_params instance
579 * Choose one configuration from configuration space defined by @params.
580 * The configuration chosen is that obtained fixing in this order:
581 * first access, first format, first subformat, min channels,
582 * min rate, min period time, max buffer size, min tick time
584 * Return: Zero if successful, or a negative error code on failure.
586 static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
587 struct snd_pcm_hw_params *params)
589 static const int vars[] = {
590 SNDRV_PCM_HW_PARAM_ACCESS,
591 SNDRV_PCM_HW_PARAM_FORMAT,
592 SNDRV_PCM_HW_PARAM_SUBFORMAT,
593 SNDRV_PCM_HW_PARAM_CHANNELS,
594 SNDRV_PCM_HW_PARAM_RATE,
595 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
596 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
597 SNDRV_PCM_HW_PARAM_TICK_TIME,
601 struct snd_mask old_mask;
602 struct snd_interval old_interval;
605 for (v = vars; *v != -1; v++) {
606 /* Keep old parameter to trace. */
607 if (trace_hw_mask_param_enabled()) {
609 old_mask = *hw_param_mask(params, *v);
611 if (trace_hw_interval_param_enabled()) {
612 if (hw_is_interval(*v))
613 old_interval = *hw_param_interval(params, *v);
615 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
616 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
618 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
619 if (snd_BUG_ON(changed < 0))
624 /* Trace the changed parameter. */
625 if (hw_is_mask(*v)) {
626 trace_hw_mask_param(pcm, *v, 0, &old_mask,
627 hw_param_mask(params, *v));
629 if (hw_is_interval(*v)) {
630 trace_hw_interval_param(pcm, *v, 0, &old_interval,
631 hw_param_interval(params, *v));
638 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
639 struct snd_pcm_hw_params *params)
641 struct snd_pcm_runtime *runtime;
644 snd_pcm_uframes_t frames;
646 if (PCM_RUNTIME_CHECK(substream))
648 runtime = substream->runtime;
649 snd_pcm_stream_lock_irq(substream);
650 switch (runtime->status->state) {
651 case SNDRV_PCM_STATE_OPEN:
652 case SNDRV_PCM_STATE_SETUP:
653 case SNDRV_PCM_STATE_PREPARED:
656 snd_pcm_stream_unlock_irq(substream);
659 snd_pcm_stream_unlock_irq(substream);
660 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
661 if (!substream->oss.oss)
663 if (atomic_read(&substream->mmap_count))
667 err = snd_pcm_hw_refine(substream, params);
671 err = snd_pcm_hw_params_choose(substream, params);
675 err = fixup_unreferenced_params(substream, params);
679 if (substream->ops->hw_params != NULL) {
680 err = substream->ops->hw_params(substream, params);
685 runtime->access = params_access(params);
686 runtime->format = params_format(params);
687 runtime->subformat = params_subformat(params);
688 runtime->channels = params_channels(params);
689 runtime->rate = params_rate(params);
690 runtime->period_size = params_period_size(params);
691 runtime->periods = params_periods(params);
692 runtime->buffer_size = params_buffer_size(params);
693 runtime->info = params->info;
694 runtime->rate_num = params->rate_num;
695 runtime->rate_den = params->rate_den;
696 runtime->no_period_wakeup =
697 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
698 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
700 bits = snd_pcm_format_physical_width(runtime->format);
701 runtime->sample_bits = bits;
702 bits *= runtime->channels;
703 runtime->frame_bits = bits;
705 while (bits % 8 != 0) {
709 runtime->byte_align = bits / 8;
710 runtime->min_align = frames;
712 /* Default sw params */
713 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
714 runtime->period_step = 1;
715 runtime->control->avail_min = runtime->period_size;
716 runtime->start_threshold = 1;
717 runtime->stop_threshold = runtime->buffer_size;
718 runtime->silence_threshold = 0;
719 runtime->silence_size = 0;
720 runtime->boundary = runtime->buffer_size;
721 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
722 runtime->boundary *= 2;
724 snd_pcm_timer_resolution_change(substream);
725 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
727 if (pm_qos_request_active(&substream->latency_pm_qos_req))
728 pm_qos_remove_request(&substream->latency_pm_qos_req);
729 if ((usecs = period_to_usecs(runtime)) >= 0)
730 pm_qos_add_request(&substream->latency_pm_qos_req,
731 PM_QOS_CPU_DMA_LATENCY, usecs);
734 /* hardware might be unusable from this time,
735 so we force application to retry to set
736 the correct hardware parameter settings */
737 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
738 if (substream->ops->hw_free != NULL)
739 substream->ops->hw_free(substream);
743 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
744 struct snd_pcm_hw_params __user * _params)
746 struct snd_pcm_hw_params *params;
749 params = memdup_user(_params, sizeof(*params));
751 return PTR_ERR(params);
753 err = snd_pcm_hw_params(substream, params);
757 if (copy_to_user(_params, params, sizeof(*params)))
764 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
766 struct snd_pcm_runtime *runtime;
769 if (PCM_RUNTIME_CHECK(substream))
771 runtime = substream->runtime;
772 snd_pcm_stream_lock_irq(substream);
773 switch (runtime->status->state) {
774 case SNDRV_PCM_STATE_SETUP:
775 case SNDRV_PCM_STATE_PREPARED:
778 snd_pcm_stream_unlock_irq(substream);
781 snd_pcm_stream_unlock_irq(substream);
782 if (atomic_read(&substream->mmap_count))
784 if (substream->ops->hw_free)
785 result = substream->ops->hw_free(substream);
786 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
787 pm_qos_remove_request(&substream->latency_pm_qos_req);
791 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
792 struct snd_pcm_sw_params *params)
794 struct snd_pcm_runtime *runtime;
797 if (PCM_RUNTIME_CHECK(substream))
799 runtime = substream->runtime;
800 snd_pcm_stream_lock_irq(substream);
801 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
802 snd_pcm_stream_unlock_irq(substream);
805 snd_pcm_stream_unlock_irq(substream);
807 if (params->tstamp_mode < 0 ||
808 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
810 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
811 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
813 if (params->avail_min == 0)
815 if (params->silence_size >= runtime->boundary) {
816 if (params->silence_threshold != 0)
819 if (params->silence_size > params->silence_threshold)
821 if (params->silence_threshold > runtime->buffer_size)
825 snd_pcm_stream_lock_irq(substream);
826 runtime->tstamp_mode = params->tstamp_mode;
827 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
828 runtime->tstamp_type = params->tstamp_type;
829 runtime->period_step = params->period_step;
830 runtime->control->avail_min = params->avail_min;
831 runtime->start_threshold = params->start_threshold;
832 runtime->stop_threshold = params->stop_threshold;
833 runtime->silence_threshold = params->silence_threshold;
834 runtime->silence_size = params->silence_size;
835 params->boundary = runtime->boundary;
836 if (snd_pcm_running(substream)) {
837 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
838 runtime->silence_size > 0)
839 snd_pcm_playback_silence(substream, ULONG_MAX);
840 err = snd_pcm_update_state(substream, runtime);
842 snd_pcm_stream_unlock_irq(substream);
846 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
847 struct snd_pcm_sw_params __user * _params)
849 struct snd_pcm_sw_params params;
851 if (copy_from_user(¶ms, _params, sizeof(params)))
853 err = snd_pcm_sw_params(substream, ¶ms);
854 if (copy_to_user(_params, ¶ms, sizeof(params)))
859 int snd_pcm_status(struct snd_pcm_substream *substream,
860 struct snd_pcm_status *status)
862 struct snd_pcm_runtime *runtime = substream->runtime;
864 snd_pcm_stream_lock_irq(substream);
866 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
867 &runtime->audio_tstamp_config);
869 /* backwards compatible behavior */
870 if (runtime->audio_tstamp_config.type_requested ==
871 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
872 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
873 runtime->audio_tstamp_config.type_requested =
874 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
876 runtime->audio_tstamp_config.type_requested =
877 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
878 runtime->audio_tstamp_report.valid = 0;
880 runtime->audio_tstamp_report.valid = 1;
882 status->state = runtime->status->state;
883 status->suspended_state = runtime->status->suspended_state;
884 if (status->state == SNDRV_PCM_STATE_OPEN)
886 status->trigger_tstamp = runtime->trigger_tstamp;
887 if (snd_pcm_running(substream)) {
888 snd_pcm_update_hw_ptr(substream);
889 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
890 status->tstamp = runtime->status->tstamp;
891 status->driver_tstamp = runtime->driver_tstamp;
892 status->audio_tstamp =
893 runtime->status->audio_tstamp;
894 if (runtime->audio_tstamp_report.valid == 1)
895 /* backwards compatibility, no report provided in COMPAT mode */
896 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
897 &status->audio_tstamp_accuracy,
898 &runtime->audio_tstamp_report);
903 /* get tstamp only in fallback mode and only if enabled */
904 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
905 snd_pcm_gettime(runtime, &status->tstamp);
908 status->appl_ptr = runtime->control->appl_ptr;
909 status->hw_ptr = runtime->status->hw_ptr;
910 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
911 status->avail = snd_pcm_playback_avail(runtime);
912 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
913 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
914 status->delay = runtime->buffer_size - status->avail;
915 status->delay += runtime->delay;
919 status->avail = snd_pcm_capture_avail(runtime);
920 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
921 status->delay = status->avail + runtime->delay;
925 status->avail_max = runtime->avail_max;
926 status->overrange = runtime->overrange;
927 runtime->avail_max = 0;
928 runtime->overrange = 0;
930 snd_pcm_stream_unlock_irq(substream);
934 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
935 struct snd_pcm_status __user * _status,
938 struct snd_pcm_status status;
941 memset(&status, 0, sizeof(status));
943 * with extension, parameters are read/write,
944 * get audio_tstamp_data from user,
945 * ignore rest of status structure
947 if (ext && get_user(status.audio_tstamp_data,
948 (u32 __user *)(&_status->audio_tstamp_data)))
950 res = snd_pcm_status(substream, &status);
953 if (copy_to_user(_status, &status, sizeof(status)))
958 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
959 struct snd_pcm_channel_info * info)
961 struct snd_pcm_runtime *runtime;
962 unsigned int channel;
964 channel = info->channel;
965 runtime = substream->runtime;
966 snd_pcm_stream_lock_irq(substream);
967 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
968 snd_pcm_stream_unlock_irq(substream);
971 snd_pcm_stream_unlock_irq(substream);
972 if (channel >= runtime->channels)
974 memset(info, 0, sizeof(*info));
975 info->channel = channel;
976 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
979 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
980 struct snd_pcm_channel_info __user * _info)
982 struct snd_pcm_channel_info info;
985 if (copy_from_user(&info, _info, sizeof(info)))
987 res = snd_pcm_channel_info(substream, &info);
990 if (copy_to_user(_info, &info, sizeof(info)))
995 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
997 struct snd_pcm_runtime *runtime = substream->runtime;
998 if (runtime->trigger_master == NULL)
1000 if (runtime->trigger_master == substream) {
1001 if (!runtime->trigger_tstamp_latched)
1002 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1004 snd_pcm_trigger_tstamp(runtime->trigger_master);
1005 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1007 runtime->trigger_master = NULL;
1011 int (*pre_action)(struct snd_pcm_substream *substream, int state);
1012 int (*do_action)(struct snd_pcm_substream *substream, int state);
1013 void (*undo_action)(struct snd_pcm_substream *substream, int state);
1014 void (*post_action)(struct snd_pcm_substream *substream, int state);
1018 * this functions is core for handling of linked stream
1019 * Note: the stream state might be changed also on failure
1020 * Note2: call with calling stream lock + link lock
1022 static int snd_pcm_action_group(const struct action_ops *ops,
1023 struct snd_pcm_substream *substream,
1024 int state, int do_lock)
1026 struct snd_pcm_substream *s = NULL;
1027 struct snd_pcm_substream *s1;
1028 int res = 0, depth = 1;
1030 snd_pcm_group_for_each_entry(s, substream) {
1031 if (do_lock && s != substream) {
1032 if (s->pcm->nonatomic)
1033 mutex_lock_nested(&s->self_group.mutex, depth);
1035 spin_lock_nested(&s->self_group.lock, depth);
1038 res = ops->pre_action(s, state);
1042 snd_pcm_group_for_each_entry(s, substream) {
1043 res = ops->do_action(s, state);
1045 if (ops->undo_action) {
1046 snd_pcm_group_for_each_entry(s1, substream) {
1047 if (s1 == s) /* failed stream */
1049 ops->undo_action(s1, state);
1052 s = NULL; /* unlock all */
1056 snd_pcm_group_for_each_entry(s, substream) {
1057 ops->post_action(s, state);
1061 /* unlock streams */
1062 snd_pcm_group_for_each_entry(s1, substream) {
1063 if (s1 != substream) {
1064 if (s1->pcm->nonatomic)
1065 mutex_unlock(&s1->self_group.mutex);
1067 spin_unlock(&s1->self_group.lock);
1069 if (s1 == s) /* end */
1077 * Note: call with stream lock
1079 static int snd_pcm_action_single(const struct action_ops *ops,
1080 struct snd_pcm_substream *substream,
1085 res = ops->pre_action(substream, state);
1088 res = ops->do_action(substream, state);
1090 ops->post_action(substream, state);
1091 else if (ops->undo_action)
1092 ops->undo_action(substream, state);
1097 * Note: call with stream lock
1099 static int snd_pcm_action(const struct action_ops *ops,
1100 struct snd_pcm_substream *substream,
1105 if (!snd_pcm_stream_linked(substream))
1106 return snd_pcm_action_single(ops, substream, state);
1108 if (substream->pcm->nonatomic) {
1109 if (!mutex_trylock(&substream->group->mutex)) {
1110 mutex_unlock(&substream->self_group.mutex);
1111 mutex_lock(&substream->group->mutex);
1112 mutex_lock(&substream->self_group.mutex);
1114 res = snd_pcm_action_group(ops, substream, state, 1);
1115 mutex_unlock(&substream->group->mutex);
1117 if (!spin_trylock(&substream->group->lock)) {
1118 spin_unlock(&substream->self_group.lock);
1119 spin_lock(&substream->group->lock);
1120 spin_lock(&substream->self_group.lock);
1122 res = snd_pcm_action_group(ops, substream, state, 1);
1123 spin_unlock(&substream->group->lock);
1129 * Note: don't use any locks before
1131 static int snd_pcm_action_lock_irq(const struct action_ops *ops,
1132 struct snd_pcm_substream *substream,
1137 snd_pcm_stream_lock_irq(substream);
1138 res = snd_pcm_action(ops, substream, state);
1139 snd_pcm_stream_unlock_irq(substream);
1145 static int snd_pcm_action_nonatomic(const struct action_ops *ops,
1146 struct snd_pcm_substream *substream,
1151 down_read(&snd_pcm_link_rwsem);
1152 if (snd_pcm_stream_linked(substream))
1153 res = snd_pcm_action_group(ops, substream, state, 0);
1155 res = snd_pcm_action_single(ops, substream, state);
1156 up_read(&snd_pcm_link_rwsem);
1163 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1165 struct snd_pcm_runtime *runtime = substream->runtime;
1166 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1168 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1169 !snd_pcm_playback_data(substream))
1171 runtime->trigger_tstamp_latched = false;
1172 runtime->trigger_master = substream;
1176 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1178 if (substream->runtime->trigger_master != substream)
1180 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1183 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1185 if (substream->runtime->trigger_master == substream)
1186 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1189 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1191 struct snd_pcm_runtime *runtime = substream->runtime;
1192 snd_pcm_trigger_tstamp(substream);
1193 runtime->hw_ptr_jiffies = jiffies;
1194 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1196 runtime->status->state = state;
1197 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1198 runtime->silence_size > 0)
1199 snd_pcm_playback_silence(substream, ULONG_MAX);
1200 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1203 static const struct action_ops snd_pcm_action_start = {
1204 .pre_action = snd_pcm_pre_start,
1205 .do_action = snd_pcm_do_start,
1206 .undo_action = snd_pcm_undo_start,
1207 .post_action = snd_pcm_post_start
1211 * snd_pcm_start - start all linked streams
1212 * @substream: the PCM substream instance
1214 * Return: Zero if successful, or a negative error code.
1215 * The stream lock must be acquired before calling this function.
1217 int snd_pcm_start(struct snd_pcm_substream *substream)
1219 return snd_pcm_action(&snd_pcm_action_start, substream,
1220 SNDRV_PCM_STATE_RUNNING);
1223 /* take the stream lock and start the streams */
1224 static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1226 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1227 SNDRV_PCM_STATE_RUNNING);
1233 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1235 struct snd_pcm_runtime *runtime = substream->runtime;
1236 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1238 runtime->trigger_master = substream;
1242 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1244 if (substream->runtime->trigger_master == substream &&
1245 snd_pcm_running(substream))
1246 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1247 return 0; /* unconditonally stop all substreams */
1250 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1252 struct snd_pcm_runtime *runtime = substream->runtime;
1253 if (runtime->status->state != state) {
1254 snd_pcm_trigger_tstamp(substream);
1255 runtime->status->state = state;
1256 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1258 wake_up(&runtime->sleep);
1259 wake_up(&runtime->tsleep);
1262 static const struct action_ops snd_pcm_action_stop = {
1263 .pre_action = snd_pcm_pre_stop,
1264 .do_action = snd_pcm_do_stop,
1265 .post_action = snd_pcm_post_stop
1269 * snd_pcm_stop - try to stop all running streams in the substream group
1270 * @substream: the PCM substream instance
1271 * @state: PCM state after stopping the stream
1273 * The state of each stream is then changed to the given state unconditionally.
1275 * Return: Zero if successful, or a negative error code.
1277 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1279 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1281 EXPORT_SYMBOL(snd_pcm_stop);
1284 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1285 * @substream: the PCM substream
1287 * After stopping, the state is changed to SETUP.
1288 * Unlike snd_pcm_stop(), this affects only the given stream.
1290 * Return: Zero if succesful, or a negative error code.
1292 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1294 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1295 SNDRV_PCM_STATE_SETUP);
1299 * snd_pcm_stop_xrun - stop the running streams as XRUN
1300 * @substream: the PCM substream instance
1302 * This stops the given running substream (and all linked substreams) as XRUN.
1303 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1305 * Return: Zero if successful, or a negative error code.
1307 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1309 unsigned long flags;
1312 snd_pcm_stream_lock_irqsave(substream, flags);
1313 if (snd_pcm_running(substream))
1314 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1315 snd_pcm_stream_unlock_irqrestore(substream, flags);
1318 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1323 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1325 struct snd_pcm_runtime *runtime = substream->runtime;
1326 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1329 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1331 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1333 runtime->trigger_master = substream;
1337 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1339 if (substream->runtime->trigger_master != substream)
1341 /* some drivers might use hw_ptr to recover from the pause -
1342 update the hw_ptr now */
1344 snd_pcm_update_hw_ptr(substream);
1345 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1346 * a delta between the current jiffies, this gives a large enough
1347 * delta, effectively to skip the check once.
1349 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1350 return substream->ops->trigger(substream,
1351 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1352 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1355 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1357 if (substream->runtime->trigger_master == substream)
1358 substream->ops->trigger(substream,
1359 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1360 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1363 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1365 struct snd_pcm_runtime *runtime = substream->runtime;
1366 snd_pcm_trigger_tstamp(substream);
1368 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1369 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1370 wake_up(&runtime->sleep);
1371 wake_up(&runtime->tsleep);
1373 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1374 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1378 static const struct action_ops snd_pcm_action_pause = {
1379 .pre_action = snd_pcm_pre_pause,
1380 .do_action = snd_pcm_do_pause,
1381 .undo_action = snd_pcm_undo_pause,
1382 .post_action = snd_pcm_post_pause
1386 * Push/release the pause for all linked streams.
1388 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1390 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1396 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1398 struct snd_pcm_runtime *runtime = substream->runtime;
1399 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1401 runtime->trigger_master = substream;
1405 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1407 struct snd_pcm_runtime *runtime = substream->runtime;
1408 if (runtime->trigger_master != substream)
1410 if (! snd_pcm_running(substream))
1412 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1413 return 0; /* suspend unconditionally */
1416 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1418 struct snd_pcm_runtime *runtime = substream->runtime;
1419 snd_pcm_trigger_tstamp(substream);
1420 runtime->status->suspended_state = runtime->status->state;
1421 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1422 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1423 wake_up(&runtime->sleep);
1424 wake_up(&runtime->tsleep);
1427 static const struct action_ops snd_pcm_action_suspend = {
1428 .pre_action = snd_pcm_pre_suspend,
1429 .do_action = snd_pcm_do_suspend,
1430 .post_action = snd_pcm_post_suspend
1434 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1435 * @substream: the PCM substream
1437 * After this call, all streams are changed to SUSPENDED state.
1439 * Return: Zero if successful (or @substream is %NULL), or a negative error
1442 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1445 unsigned long flags;
1450 snd_pcm_stream_lock_irqsave(substream, flags);
1451 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1452 snd_pcm_stream_unlock_irqrestore(substream, flags);
1455 EXPORT_SYMBOL(snd_pcm_suspend);
1458 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1459 * @pcm: the PCM instance
1461 * After this call, all streams are changed to SUSPENDED state.
1463 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1465 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1467 struct snd_pcm_substream *substream;
1468 int stream, err = 0;
1473 for (stream = 0; stream < 2; stream++) {
1474 for (substream = pcm->streams[stream].substream;
1475 substream; substream = substream->next) {
1476 /* FIXME: the open/close code should lock this as well */
1477 if (substream->runtime == NULL)
1479 err = snd_pcm_suspend(substream);
1480 if (err < 0 && err != -EBUSY)
1486 EXPORT_SYMBOL(snd_pcm_suspend_all);
1490 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1492 struct snd_pcm_runtime *runtime = substream->runtime;
1493 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1495 runtime->trigger_master = substream;
1499 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1501 struct snd_pcm_runtime *runtime = substream->runtime;
1502 if (runtime->trigger_master != substream)
1504 /* DMA not running previously? */
1505 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1506 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1507 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1509 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1512 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1514 if (substream->runtime->trigger_master == substream &&
1515 snd_pcm_running(substream))
1516 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1519 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1521 struct snd_pcm_runtime *runtime = substream->runtime;
1522 snd_pcm_trigger_tstamp(substream);
1523 runtime->status->state = runtime->status->suspended_state;
1524 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1527 static const struct action_ops snd_pcm_action_resume = {
1528 .pre_action = snd_pcm_pre_resume,
1529 .do_action = snd_pcm_do_resume,
1530 .undo_action = snd_pcm_undo_resume,
1531 .post_action = snd_pcm_post_resume
1534 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1536 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1541 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1546 #endif /* CONFIG_PM */
1551 * Change the RUNNING stream(s) to XRUN state.
1553 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1555 struct snd_pcm_runtime *runtime = substream->runtime;
1558 snd_pcm_stream_lock_irq(substream);
1559 switch (runtime->status->state) {
1560 case SNDRV_PCM_STATE_XRUN:
1561 result = 0; /* already there */
1563 case SNDRV_PCM_STATE_RUNNING:
1564 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1569 snd_pcm_stream_unlock_irq(substream);
1576 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1578 struct snd_pcm_runtime *runtime = substream->runtime;
1579 switch (runtime->status->state) {
1580 case SNDRV_PCM_STATE_RUNNING:
1581 case SNDRV_PCM_STATE_PREPARED:
1582 case SNDRV_PCM_STATE_PAUSED:
1583 case SNDRV_PCM_STATE_SUSPENDED:
1590 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1592 struct snd_pcm_runtime *runtime = substream->runtime;
1593 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1596 runtime->hw_ptr_base = 0;
1597 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1598 runtime->status->hw_ptr % runtime->period_size;
1599 runtime->silence_start = runtime->status->hw_ptr;
1600 runtime->silence_filled = 0;
1604 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1606 struct snd_pcm_runtime *runtime = substream->runtime;
1607 runtime->control->appl_ptr = runtime->status->hw_ptr;
1608 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1609 runtime->silence_size > 0)
1610 snd_pcm_playback_silence(substream, ULONG_MAX);
1613 static const struct action_ops snd_pcm_action_reset = {
1614 .pre_action = snd_pcm_pre_reset,
1615 .do_action = snd_pcm_do_reset,
1616 .post_action = snd_pcm_post_reset
1619 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1621 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1627 /* we use the second argument for updating f_flags */
1628 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1631 struct snd_pcm_runtime *runtime = substream->runtime;
1632 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1633 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1635 if (snd_pcm_running(substream))
1637 substream->f_flags = f_flags;
1641 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1644 err = substream->ops->prepare(substream);
1647 return snd_pcm_do_reset(substream, 0);
1650 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1652 struct snd_pcm_runtime *runtime = substream->runtime;
1653 runtime->control->appl_ptr = runtime->status->hw_ptr;
1654 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1657 static const struct action_ops snd_pcm_action_prepare = {
1658 .pre_action = snd_pcm_pre_prepare,
1659 .do_action = snd_pcm_do_prepare,
1660 .post_action = snd_pcm_post_prepare
1664 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1665 * @substream: the PCM substream instance
1666 * @file: file to refer f_flags
1668 * Return: Zero if successful, or a negative error code.
1670 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1676 f_flags = file->f_flags;
1678 f_flags = substream->f_flags;
1680 snd_pcm_stream_lock_irq(substream);
1681 switch (substream->runtime->status->state) {
1682 case SNDRV_PCM_STATE_PAUSED:
1683 snd_pcm_pause(substream, 0);
1685 case SNDRV_PCM_STATE_SUSPENDED:
1686 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1689 snd_pcm_stream_unlock_irq(substream);
1691 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1692 substream, f_flags);
1699 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1701 struct snd_pcm_runtime *runtime = substream->runtime;
1702 switch (runtime->status->state) {
1703 case SNDRV_PCM_STATE_OPEN:
1704 case SNDRV_PCM_STATE_DISCONNECTED:
1705 case SNDRV_PCM_STATE_SUSPENDED:
1708 runtime->trigger_master = substream;
1712 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1714 struct snd_pcm_runtime *runtime = substream->runtime;
1715 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1716 switch (runtime->status->state) {
1717 case SNDRV_PCM_STATE_PREPARED:
1718 /* start playback stream if possible */
1719 if (! snd_pcm_playback_empty(substream)) {
1720 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1721 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1723 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1726 case SNDRV_PCM_STATE_RUNNING:
1727 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1729 case SNDRV_PCM_STATE_XRUN:
1730 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1736 /* stop running stream */
1737 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1738 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1739 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1740 snd_pcm_do_stop(substream, new_state);
1741 snd_pcm_post_stop(substream, new_state);
1745 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1746 runtime->trigger_master == substream &&
1747 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1748 return substream->ops->trigger(substream,
1749 SNDRV_PCM_TRIGGER_DRAIN);
1754 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1758 static const struct action_ops snd_pcm_action_drain_init = {
1759 .pre_action = snd_pcm_pre_drain_init,
1760 .do_action = snd_pcm_do_drain_init,
1761 .post_action = snd_pcm_post_drain_init
1764 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1767 * Drain the stream(s).
1768 * When the substream is linked, sync until the draining of all playback streams
1770 * After this call, all streams are supposed to be either SETUP or DRAINING
1771 * (capture only) state.
1773 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1776 struct snd_card *card;
1777 struct snd_pcm_runtime *runtime;
1778 struct snd_pcm_substream *s;
1779 wait_queue_entry_t wait;
1783 card = substream->pcm->card;
1784 runtime = substream->runtime;
1786 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1790 if (file->f_flags & O_NONBLOCK)
1792 } else if (substream->f_flags & O_NONBLOCK)
1795 down_read(&snd_pcm_link_rwsem);
1796 snd_pcm_stream_lock_irq(substream);
1798 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1799 snd_pcm_pause(substream, 0);
1801 /* pre-start/stop - all running streams are changed to DRAINING state */
1802 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1805 /* in non-blocking, we don't wait in ioctl but let caller poll */
1813 struct snd_pcm_runtime *to_check;
1814 if (signal_pending(current)) {
1815 result = -ERESTARTSYS;
1818 /* find a substream to drain */
1820 snd_pcm_group_for_each_entry(s, substream) {
1821 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1823 runtime = s->runtime;
1824 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1830 break; /* all drained */
1831 init_waitqueue_entry(&wait, current);
1832 add_wait_queue(&to_check->sleep, &wait);
1833 snd_pcm_stream_unlock_irq(substream);
1834 up_read(&snd_pcm_link_rwsem);
1835 snd_power_unlock(card);
1836 if (runtime->no_period_wakeup)
1837 tout = MAX_SCHEDULE_TIMEOUT;
1840 if (runtime->rate) {
1841 long t = runtime->period_size * 2 / runtime->rate;
1842 tout = max(t, tout);
1844 tout = msecs_to_jiffies(tout * 1000);
1846 tout = schedule_timeout_interruptible(tout);
1847 snd_power_lock(card);
1848 down_read(&snd_pcm_link_rwsem);
1849 snd_pcm_stream_lock_irq(substream);
1850 remove_wait_queue(&to_check->sleep, &wait);
1851 if (card->shutdown) {
1856 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1859 dev_dbg(substream->pcm->card->dev,
1860 "playback drain error (DMA or IRQ trouble?)\n");
1861 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1869 snd_pcm_stream_unlock_irq(substream);
1870 up_read(&snd_pcm_link_rwsem);
1878 * Immediately put all linked substreams into SETUP state.
1880 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1882 struct snd_pcm_runtime *runtime;
1885 if (PCM_RUNTIME_CHECK(substream))
1887 runtime = substream->runtime;
1889 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1890 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1893 snd_pcm_stream_lock_irq(substream);
1895 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1896 snd_pcm_pause(substream, 0);
1898 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1899 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1900 snd_pcm_stream_unlock_irq(substream);
1906 static bool is_pcm_file(struct file *file)
1908 struct inode *inode = file_inode(file);
1911 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1913 minor = iminor(inode);
1914 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1915 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1921 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1924 struct snd_pcm_file *pcm_file;
1925 struct snd_pcm_substream *substream1;
1926 struct snd_pcm_group *group;
1927 struct fd f = fdget(fd);
1931 if (!is_pcm_file(f.file)) {
1935 pcm_file = f.file->private_data;
1936 substream1 = pcm_file->substream;
1937 group = kmalloc(sizeof(*group), GFP_KERNEL);
1942 down_write_nonblock(&snd_pcm_link_rwsem);
1943 write_lock_irq(&snd_pcm_link_rwlock);
1944 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1945 substream->runtime->status->state != substream1->runtime->status->state ||
1946 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1950 if (snd_pcm_stream_linked(substream1)) {
1954 if (!snd_pcm_stream_linked(substream)) {
1955 substream->group = group;
1957 spin_lock_init(&substream->group->lock);
1958 mutex_init(&substream->group->mutex);
1959 INIT_LIST_HEAD(&substream->group->substreams);
1960 list_add_tail(&substream->link_list, &substream->group->substreams);
1961 substream->group->count = 1;
1963 list_add_tail(&substream1->link_list, &substream->group->substreams);
1964 substream->group->count++;
1965 substream1->group = substream->group;
1967 write_unlock_irq(&snd_pcm_link_rwlock);
1968 up_write(&snd_pcm_link_rwsem);
1970 snd_card_unref(substream1->pcm->card);
1977 static void relink_to_local(struct snd_pcm_substream *substream)
1979 substream->group = &substream->self_group;
1980 INIT_LIST_HEAD(&substream->self_group.substreams);
1981 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1984 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1986 struct snd_pcm_substream *s;
1989 down_write_nonblock(&snd_pcm_link_rwsem);
1990 write_lock_irq(&snd_pcm_link_rwlock);
1991 if (!snd_pcm_stream_linked(substream)) {
1995 list_del(&substream->link_list);
1996 substream->group->count--;
1997 if (substream->group->count == 1) { /* detach the last stream, too */
1998 snd_pcm_group_for_each_entry(s, substream) {
2002 kfree(substream->group);
2004 relink_to_local(substream);
2006 write_unlock_irq(&snd_pcm_link_rwlock);
2007 up_write(&snd_pcm_link_rwsem);
2014 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2015 struct snd_pcm_hw_rule *rule)
2017 struct snd_interval t;
2018 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2019 hw_param_interval_c(params, rule->deps[1]), &t);
2020 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2023 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2024 struct snd_pcm_hw_rule *rule)
2026 struct snd_interval t;
2027 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2028 hw_param_interval_c(params, rule->deps[1]), &t);
2029 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2032 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2033 struct snd_pcm_hw_rule *rule)
2035 struct snd_interval t;
2036 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2037 hw_param_interval_c(params, rule->deps[1]),
2038 (unsigned long) rule->private, &t);
2039 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2042 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2043 struct snd_pcm_hw_rule *rule)
2045 struct snd_interval t;
2046 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2047 (unsigned long) rule->private,
2048 hw_param_interval_c(params, rule->deps[1]), &t);
2049 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2052 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2053 struct snd_pcm_hw_rule *rule)
2056 const struct snd_interval *i =
2057 hw_param_interval_c(params, rule->deps[0]);
2059 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2061 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2063 if (! snd_mask_test(mask, k))
2065 bits = snd_pcm_format_physical_width(k);
2067 continue; /* ignore invalid formats */
2068 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2069 snd_mask_reset(&m, k);
2071 return snd_mask_refine(mask, &m);
2074 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2075 struct snd_pcm_hw_rule *rule)
2077 struct snd_interval t;
2083 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2085 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2087 bits = snd_pcm_format_physical_width(k);
2089 continue; /* ignore invalid formats */
2090 if (t.min > (unsigned)bits)
2092 if (t.max < (unsigned)bits)
2096 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2099 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2100 #error "Change this table"
2103 static const unsigned int rates[] = {
2104 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2105 48000, 64000, 88200, 96000, 176400, 192000
2108 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2109 .count = ARRAY_SIZE(rates),
2113 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2114 struct snd_pcm_hw_rule *rule)
2116 struct snd_pcm_hardware *hw = rule->private;
2117 return snd_interval_list(hw_param_interval(params, rule->var),
2118 snd_pcm_known_rates.count,
2119 snd_pcm_known_rates.list, hw->rates);
2122 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2123 struct snd_pcm_hw_rule *rule)
2125 struct snd_interval t;
2126 struct snd_pcm_substream *substream = rule->private;
2128 t.max = substream->buffer_bytes_max;
2132 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2135 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
2137 struct snd_pcm_runtime *runtime = substream->runtime;
2138 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
2141 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2142 snd_mask_any(constrs_mask(constrs, k));
2145 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2146 snd_interval_any(constrs_interval(constrs, k));
2149 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2150 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2151 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2152 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2153 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2155 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2156 snd_pcm_hw_rule_format, NULL,
2157 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2160 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2161 snd_pcm_hw_rule_sample_bits, NULL,
2162 SNDRV_PCM_HW_PARAM_FORMAT,
2163 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2166 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2167 snd_pcm_hw_rule_div, NULL,
2168 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2171 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2172 snd_pcm_hw_rule_mul, NULL,
2173 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2176 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2177 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2178 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2181 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2182 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2183 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2186 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2187 snd_pcm_hw_rule_div, NULL,
2188 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2191 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2192 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2193 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2196 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2197 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2198 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2201 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2202 snd_pcm_hw_rule_div, NULL,
2203 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2206 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2207 snd_pcm_hw_rule_div, NULL,
2208 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2211 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2212 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2213 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2216 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2217 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2218 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2221 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2222 snd_pcm_hw_rule_mul, NULL,
2223 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2226 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2227 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2228 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2231 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2232 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2233 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2236 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2237 snd_pcm_hw_rule_muldivk, (void*) 8,
2238 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2241 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2242 snd_pcm_hw_rule_muldivk, (void*) 8,
2243 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2246 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2247 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2248 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2251 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2252 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2253 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2259 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2261 struct snd_pcm_runtime *runtime = substream->runtime;
2262 struct snd_pcm_hardware *hw = &runtime->hw;
2264 unsigned int mask = 0;
2266 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2267 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2268 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2269 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2270 if (hw_support_mmap(substream)) {
2271 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2272 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2273 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2274 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2275 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2276 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2278 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2282 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2286 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2290 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2291 hw->channels_min, hw->channels_max);
2295 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2296 hw->rate_min, hw->rate_max);
2300 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2301 hw->period_bytes_min, hw->period_bytes_max);
2305 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2306 hw->periods_min, hw->periods_max);
2310 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2311 hw->period_bytes_min, hw->buffer_bytes_max);
2315 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2316 snd_pcm_hw_rule_buffer_bytes_max, substream,
2317 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2322 if (runtime->dma_bytes) {
2323 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2328 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2329 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2330 snd_pcm_hw_rule_rate, hw,
2331 SNDRV_PCM_HW_PARAM_RATE, -1);
2336 /* FIXME: this belong to lowlevel */
2337 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2342 static void pcm_release_private(struct snd_pcm_substream *substream)
2344 snd_pcm_unlink(substream);
2347 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2349 substream->ref_count--;
2350 if (substream->ref_count > 0)
2353 snd_pcm_drop(substream);
2354 if (substream->hw_opened) {
2355 if (substream->ops->hw_free &&
2356 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2357 substream->ops->hw_free(substream);
2358 substream->ops->close(substream);
2359 substream->hw_opened = 0;
2361 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2362 pm_qos_remove_request(&substream->latency_pm_qos_req);
2363 if (substream->pcm_release) {
2364 substream->pcm_release(substream);
2365 substream->pcm_release = NULL;
2367 snd_pcm_detach_substream(substream);
2369 EXPORT_SYMBOL(snd_pcm_release_substream);
2371 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2373 struct snd_pcm_substream **rsubstream)
2375 struct snd_pcm_substream *substream;
2378 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2381 if (substream->ref_count > 1) {
2382 *rsubstream = substream;
2386 err = snd_pcm_hw_constraints_init(substream);
2388 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2392 if ((err = substream->ops->open(substream)) < 0)
2395 substream->hw_opened = 1;
2397 err = snd_pcm_hw_constraints_complete(substream);
2399 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2403 *rsubstream = substream;
2407 snd_pcm_release_substream(substream);
2410 EXPORT_SYMBOL(snd_pcm_open_substream);
2412 static int snd_pcm_open_file(struct file *file,
2413 struct snd_pcm *pcm,
2416 struct snd_pcm_file *pcm_file;
2417 struct snd_pcm_substream *substream;
2420 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2424 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2425 if (pcm_file == NULL) {
2426 snd_pcm_release_substream(substream);
2429 pcm_file->substream = substream;
2430 if (substream->ref_count == 1) {
2431 substream->file = pcm_file;
2432 substream->pcm_release = pcm_release_private;
2434 file->private_data = pcm_file;
2439 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2441 struct snd_pcm *pcm;
2442 int err = nonseekable_open(inode, file);
2445 pcm = snd_lookup_minor_data(iminor(inode),
2446 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2447 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2449 snd_card_unref(pcm->card);
2453 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2455 struct snd_pcm *pcm;
2456 int err = nonseekable_open(inode, file);
2459 pcm = snd_lookup_minor_data(iminor(inode),
2460 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2461 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2463 snd_card_unref(pcm->card);
2467 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2470 wait_queue_entry_t wait;
2476 err = snd_card_file_add(pcm->card, file);
2479 if (!try_module_get(pcm->card->module)) {
2483 init_waitqueue_entry(&wait, current);
2484 add_wait_queue(&pcm->open_wait, &wait);
2485 mutex_lock(&pcm->open_mutex);
2487 err = snd_pcm_open_file(file, pcm, stream);
2490 if (err == -EAGAIN) {
2491 if (file->f_flags & O_NONBLOCK) {
2497 set_current_state(TASK_INTERRUPTIBLE);
2498 mutex_unlock(&pcm->open_mutex);
2500 mutex_lock(&pcm->open_mutex);
2501 if (pcm->card->shutdown) {
2505 if (signal_pending(current)) {
2510 remove_wait_queue(&pcm->open_wait, &wait);
2511 mutex_unlock(&pcm->open_mutex);
2517 module_put(pcm->card->module);
2519 snd_card_file_remove(pcm->card, file);
2524 static int snd_pcm_release(struct inode *inode, struct file *file)
2526 struct snd_pcm *pcm;
2527 struct snd_pcm_substream *substream;
2528 struct snd_pcm_file *pcm_file;
2530 pcm_file = file->private_data;
2531 substream = pcm_file->substream;
2532 if (snd_BUG_ON(!substream))
2534 pcm = substream->pcm;
2535 mutex_lock(&pcm->open_mutex);
2536 snd_pcm_release_substream(substream);
2538 mutex_unlock(&pcm->open_mutex);
2539 wake_up(&pcm->open_wait);
2540 module_put(pcm->card->module);
2541 snd_card_file_remove(pcm->card, file);
2545 /* check and update PCM state; return 0 or a negative error
2546 * call this inside PCM lock
2548 static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2550 switch (substream->runtime->status->state) {
2551 case SNDRV_PCM_STATE_DRAINING:
2552 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2555 case SNDRV_PCM_STATE_RUNNING:
2556 return snd_pcm_update_hw_ptr(substream);
2557 case SNDRV_PCM_STATE_PREPARED:
2558 case SNDRV_PCM_STATE_PAUSED:
2560 case SNDRV_PCM_STATE_SUSPENDED:
2562 case SNDRV_PCM_STATE_XRUN:
2569 /* increase the appl_ptr; returns the processed frames or a negative error */
2570 static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2571 snd_pcm_uframes_t frames,
2572 snd_pcm_sframes_t avail)
2574 struct snd_pcm_runtime *runtime = substream->runtime;
2575 snd_pcm_sframes_t appl_ptr;
2580 if (frames > (snd_pcm_uframes_t)avail)
2582 appl_ptr = runtime->control->appl_ptr + frames;
2583 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2584 appl_ptr -= runtime->boundary;
2585 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2586 return ret < 0 ? ret : frames;
2589 /* decrease the appl_ptr; returns the processed frames or a negative error */
2590 static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2591 snd_pcm_uframes_t frames,
2592 snd_pcm_sframes_t avail)
2594 struct snd_pcm_runtime *runtime = substream->runtime;
2595 snd_pcm_sframes_t appl_ptr;
2600 if (frames > (snd_pcm_uframes_t)avail)
2602 appl_ptr = runtime->control->appl_ptr - frames;
2604 appl_ptr += runtime->boundary;
2605 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2606 return ret < 0 ? ret : frames;
2609 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2610 snd_pcm_uframes_t frames)
2612 struct snd_pcm_runtime *runtime = substream->runtime;
2613 snd_pcm_sframes_t ret;
2618 snd_pcm_stream_lock_irq(substream);
2619 ret = do_pcm_hwsync(substream);
2621 ret = rewind_appl_ptr(substream, frames,
2622 snd_pcm_playback_hw_avail(runtime));
2623 snd_pcm_stream_unlock_irq(substream);
2627 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2628 snd_pcm_uframes_t frames)
2630 struct snd_pcm_runtime *runtime = substream->runtime;
2631 snd_pcm_sframes_t ret;
2636 snd_pcm_stream_lock_irq(substream);
2637 ret = do_pcm_hwsync(substream);
2639 ret = rewind_appl_ptr(substream, frames,
2640 snd_pcm_capture_hw_avail(runtime));
2641 snd_pcm_stream_unlock_irq(substream);
2645 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2646 snd_pcm_uframes_t frames)
2648 struct snd_pcm_runtime *runtime = substream->runtime;
2649 snd_pcm_sframes_t ret;
2654 snd_pcm_stream_lock_irq(substream);
2655 ret = do_pcm_hwsync(substream);
2657 ret = forward_appl_ptr(substream, frames,
2658 snd_pcm_playback_avail(runtime));
2659 snd_pcm_stream_unlock_irq(substream);
2663 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2664 snd_pcm_uframes_t frames)
2666 struct snd_pcm_runtime *runtime = substream->runtime;
2667 snd_pcm_sframes_t ret;
2672 snd_pcm_stream_lock_irq(substream);
2673 ret = do_pcm_hwsync(substream);
2675 ret = forward_appl_ptr(substream, frames,
2676 snd_pcm_capture_avail(runtime));
2677 snd_pcm_stream_unlock_irq(substream);
2681 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2685 snd_pcm_stream_lock_irq(substream);
2686 err = do_pcm_hwsync(substream);
2687 snd_pcm_stream_unlock_irq(substream);
2691 static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream)
2693 struct snd_pcm_runtime *runtime = substream->runtime;
2695 snd_pcm_sframes_t n = 0;
2697 snd_pcm_stream_lock_irq(substream);
2698 err = do_pcm_hwsync(substream);
2700 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2701 n = snd_pcm_playback_hw_avail(runtime);
2703 n = snd_pcm_capture_avail(runtime);
2704 n += runtime->delay;
2706 snd_pcm_stream_unlock_irq(substream);
2707 return err < 0 ? err : n;
2710 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2711 struct snd_pcm_sync_ptr __user *_sync_ptr)
2713 struct snd_pcm_runtime *runtime = substream->runtime;
2714 struct snd_pcm_sync_ptr sync_ptr;
2715 volatile struct snd_pcm_mmap_status *status;
2716 volatile struct snd_pcm_mmap_control *control;
2719 memset(&sync_ptr, 0, sizeof(sync_ptr));
2720 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2722 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2724 status = runtime->status;
2725 control = runtime->control;
2726 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2727 err = snd_pcm_hwsync(substream);
2731 snd_pcm_stream_lock_irq(substream);
2732 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2733 err = pcm_lib_apply_appl_ptr(substream,
2734 sync_ptr.c.control.appl_ptr);
2736 snd_pcm_stream_unlock_irq(substream);
2740 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2742 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2743 control->avail_min = sync_ptr.c.control.avail_min;
2745 sync_ptr.c.control.avail_min = control->avail_min;
2746 sync_ptr.s.status.state = status->state;
2747 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2748 sync_ptr.s.status.tstamp = status->tstamp;
2749 sync_ptr.s.status.suspended_state = status->suspended_state;
2750 snd_pcm_stream_unlock_irq(substream);
2751 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2756 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2758 struct snd_pcm_runtime *runtime = substream->runtime;
2761 if (get_user(arg, _arg))
2763 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2765 runtime->tstamp_type = arg;
2769 static int snd_pcm_common_ioctl(struct file *file,
2770 struct snd_pcm_substream *substream,
2771 unsigned int cmd, void __user *arg)
2773 struct snd_pcm_file *pcm_file = file->private_data;
2776 case SNDRV_PCM_IOCTL_PVERSION:
2777 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2778 case SNDRV_PCM_IOCTL_INFO:
2779 return snd_pcm_info_user(substream, arg);
2780 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2782 case SNDRV_PCM_IOCTL_TTSTAMP:
2783 return snd_pcm_tstamp(substream, arg);
2784 case SNDRV_PCM_IOCTL_USER_PVERSION:
2785 if (get_user(pcm_file->user_pversion,
2786 (unsigned int __user *)arg))
2789 case SNDRV_PCM_IOCTL_HW_REFINE:
2790 return snd_pcm_hw_refine_user(substream, arg);
2791 case SNDRV_PCM_IOCTL_HW_PARAMS:
2792 return snd_pcm_hw_params_user(substream, arg);
2793 case SNDRV_PCM_IOCTL_HW_FREE:
2794 return snd_pcm_hw_free(substream);
2795 case SNDRV_PCM_IOCTL_SW_PARAMS:
2796 return snd_pcm_sw_params_user(substream, arg);
2797 case SNDRV_PCM_IOCTL_STATUS:
2798 return snd_pcm_status_user(substream, arg, false);
2799 case SNDRV_PCM_IOCTL_STATUS_EXT:
2800 return snd_pcm_status_user(substream, arg, true);
2801 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2802 return snd_pcm_channel_info_user(substream, arg);
2803 case SNDRV_PCM_IOCTL_PREPARE:
2804 return snd_pcm_prepare(substream, file);
2805 case SNDRV_PCM_IOCTL_RESET:
2806 return snd_pcm_reset(substream);
2807 case SNDRV_PCM_IOCTL_START:
2808 return snd_pcm_start_lock_irq(substream);
2809 case SNDRV_PCM_IOCTL_LINK:
2810 return snd_pcm_link(substream, (int)(unsigned long) arg);
2811 case SNDRV_PCM_IOCTL_UNLINK:
2812 return snd_pcm_unlink(substream);
2813 case SNDRV_PCM_IOCTL_RESUME:
2814 return snd_pcm_resume(substream);
2815 case SNDRV_PCM_IOCTL_XRUN:
2816 return snd_pcm_xrun(substream);
2817 case SNDRV_PCM_IOCTL_HWSYNC:
2818 return snd_pcm_hwsync(substream);
2819 case SNDRV_PCM_IOCTL_DELAY:
2821 snd_pcm_sframes_t delay = snd_pcm_delay(substream);
2822 snd_pcm_sframes_t __user *res = arg;
2826 if (put_user(delay, res))
2830 case SNDRV_PCM_IOCTL_SYNC_PTR:
2831 return snd_pcm_sync_ptr(substream, arg);
2832 #ifdef CONFIG_SND_SUPPORT_OLD_API
2833 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2834 return snd_pcm_hw_refine_old_user(substream, arg);
2835 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2836 return snd_pcm_hw_params_old_user(substream, arg);
2838 case SNDRV_PCM_IOCTL_DRAIN:
2839 return snd_pcm_drain(substream, file);
2840 case SNDRV_PCM_IOCTL_DROP:
2841 return snd_pcm_drop(substream);
2842 case SNDRV_PCM_IOCTL_PAUSE:
2843 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2845 (int)(unsigned long)arg);
2847 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2851 static int snd_pcm_common_ioctl1(struct file *file,
2852 struct snd_pcm_substream *substream,
2853 unsigned int cmd, void __user *arg)
2855 struct snd_card *card = substream->pcm->card;
2858 snd_power_lock(card);
2859 res = snd_power_wait(card, SNDRV_CTL_POWER_D0);
2861 res = snd_pcm_common_ioctl(file, substream, cmd, arg);
2862 snd_power_unlock(card);
2866 static int snd_pcm_playback_ioctl1(struct file *file,
2867 struct snd_pcm_substream *substream,
2868 unsigned int cmd, void __user *arg)
2870 if (PCM_RUNTIME_CHECK(substream))
2872 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2875 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2877 struct snd_xferi xferi;
2878 struct snd_xferi __user *_xferi = arg;
2879 struct snd_pcm_runtime *runtime = substream->runtime;
2880 snd_pcm_sframes_t result;
2881 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2883 if (put_user(0, &_xferi->result))
2885 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2887 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2888 __put_user(result, &_xferi->result);
2889 return result < 0 ? result : 0;
2891 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2893 struct snd_xfern xfern;
2894 struct snd_xfern __user *_xfern = arg;
2895 struct snd_pcm_runtime *runtime = substream->runtime;
2897 snd_pcm_sframes_t result;
2898 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2900 if (runtime->channels > 128)
2902 if (put_user(0, &_xfern->result))
2904 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2907 bufs = memdup_user(xfern.bufs,
2908 sizeof(void *) * runtime->channels);
2910 return PTR_ERR(bufs);
2911 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2913 __put_user(result, &_xfern->result);
2914 return result < 0 ? result : 0;
2916 case SNDRV_PCM_IOCTL_REWIND:
2918 snd_pcm_uframes_t frames;
2919 snd_pcm_uframes_t __user *_frames = arg;
2920 snd_pcm_sframes_t result;
2921 if (get_user(frames, _frames))
2923 if (put_user(0, _frames))
2925 result = snd_pcm_playback_rewind(substream, frames);
2926 __put_user(result, _frames);
2927 return result < 0 ? result : 0;
2929 case SNDRV_PCM_IOCTL_FORWARD:
2931 snd_pcm_uframes_t frames;
2932 snd_pcm_uframes_t __user *_frames = arg;
2933 snd_pcm_sframes_t result;
2934 if (get_user(frames, _frames))
2936 if (put_user(0, _frames))
2938 result = snd_pcm_playback_forward(substream, frames);
2939 __put_user(result, _frames);
2940 return result < 0 ? result : 0;
2943 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2946 static int snd_pcm_capture_ioctl1(struct file *file,
2947 struct snd_pcm_substream *substream,
2948 unsigned int cmd, void __user *arg)
2950 if (PCM_RUNTIME_CHECK(substream))
2952 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2955 case SNDRV_PCM_IOCTL_READI_FRAMES:
2957 struct snd_xferi xferi;
2958 struct snd_xferi __user *_xferi = arg;
2959 struct snd_pcm_runtime *runtime = substream->runtime;
2960 snd_pcm_sframes_t result;
2961 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2963 if (put_user(0, &_xferi->result))
2965 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2967 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2968 __put_user(result, &_xferi->result);
2969 return result < 0 ? result : 0;
2971 case SNDRV_PCM_IOCTL_READN_FRAMES:
2973 struct snd_xfern xfern;
2974 struct snd_xfern __user *_xfern = arg;
2975 struct snd_pcm_runtime *runtime = substream->runtime;
2977 snd_pcm_sframes_t result;
2978 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2980 if (runtime->channels > 128)
2982 if (put_user(0, &_xfern->result))
2984 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2987 bufs = memdup_user(xfern.bufs,
2988 sizeof(void *) * runtime->channels);
2990 return PTR_ERR(bufs);
2991 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2993 __put_user(result, &_xfern->result);
2994 return result < 0 ? result : 0;
2996 case SNDRV_PCM_IOCTL_REWIND:
2998 snd_pcm_uframes_t frames;
2999 snd_pcm_uframes_t __user *_frames = arg;
3000 snd_pcm_sframes_t result;
3001 if (get_user(frames, _frames))
3003 if (put_user(0, _frames))
3005 result = snd_pcm_capture_rewind(substream, frames);
3006 __put_user(result, _frames);
3007 return result < 0 ? result : 0;
3009 case SNDRV_PCM_IOCTL_FORWARD:
3011 snd_pcm_uframes_t frames;
3012 snd_pcm_uframes_t __user *_frames = arg;
3013 snd_pcm_sframes_t result;
3014 if (get_user(frames, _frames))
3016 if (put_user(0, _frames))
3018 result = snd_pcm_capture_forward(substream, frames);
3019 __put_user(result, _frames);
3020 return result < 0 ? result : 0;
3023 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
3026 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
3029 struct snd_pcm_file *pcm_file;
3031 pcm_file = file->private_data;
3033 if (((cmd >> 8) & 0xff) != 'A')
3036 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
3037 (void __user *)arg);
3040 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
3043 struct snd_pcm_file *pcm_file;
3045 pcm_file = file->private_data;
3047 if (((cmd >> 8) & 0xff) != 'A')
3050 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
3051 (void __user *)arg);
3055 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
3056 * @substream: PCM substream
3058 * @arg: IOCTL argument
3060 * The function is provided primarily for OSS layer and USB gadget drivers,
3061 * and it allows only the limited set of ioctls (hw_params, sw_params,
3062 * prepare, start, drain, drop, forward).
3064 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3065 unsigned int cmd, void *arg)
3067 snd_pcm_uframes_t *frames = arg;
3068 snd_pcm_sframes_t result;
3071 case SNDRV_PCM_IOCTL_FORWARD:
3073 /* provided only for OSS; capture-only and no value returned */
3074 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3076 result = snd_pcm_capture_forward(substream, *frames);
3077 return result < 0 ? result : 0;
3079 case SNDRV_PCM_IOCTL_HW_PARAMS:
3080 return snd_pcm_hw_params(substream, arg);
3081 case SNDRV_PCM_IOCTL_SW_PARAMS:
3082 return snd_pcm_sw_params(substream, arg);
3083 case SNDRV_PCM_IOCTL_PREPARE:
3084 return snd_pcm_prepare(substream, NULL);
3085 case SNDRV_PCM_IOCTL_START:
3086 return snd_pcm_start_lock_irq(substream);
3087 case SNDRV_PCM_IOCTL_DRAIN:
3088 return snd_pcm_drain(substream, NULL);
3089 case SNDRV_PCM_IOCTL_DROP:
3090 return snd_pcm_drop(substream);
3091 case SNDRV_PCM_IOCTL_DELAY:
3093 result = snd_pcm_delay(substream);
3103 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3105 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3108 struct snd_pcm_file *pcm_file;
3109 struct snd_pcm_substream *substream;
3110 struct snd_pcm_runtime *runtime;
3111 snd_pcm_sframes_t result;
3113 pcm_file = file->private_data;
3114 substream = pcm_file->substream;
3115 if (PCM_RUNTIME_CHECK(substream))
3117 runtime = substream->runtime;
3118 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3120 if (!frame_aligned(runtime, count))
3122 count = bytes_to_frames(runtime, count);
3123 result = snd_pcm_lib_read(substream, buf, count);
3125 result = frames_to_bytes(runtime, result);
3129 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3130 size_t count, loff_t * offset)
3132 struct snd_pcm_file *pcm_file;
3133 struct snd_pcm_substream *substream;
3134 struct snd_pcm_runtime *runtime;
3135 snd_pcm_sframes_t result;
3137 pcm_file = file->private_data;
3138 substream = pcm_file->substream;
3139 if (PCM_RUNTIME_CHECK(substream))
3141 runtime = substream->runtime;
3142 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3144 if (!frame_aligned(runtime, count))
3146 count = bytes_to_frames(runtime, count);
3147 result = snd_pcm_lib_write(substream, buf, count);
3149 result = frames_to_bytes(runtime, result);
3153 static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
3155 struct snd_pcm_file *pcm_file;
3156 struct snd_pcm_substream *substream;
3157 struct snd_pcm_runtime *runtime;
3158 snd_pcm_sframes_t result;
3161 snd_pcm_uframes_t frames;
3163 pcm_file = iocb->ki_filp->private_data;
3164 substream = pcm_file->substream;
3165 if (PCM_RUNTIME_CHECK(substream))
3167 runtime = substream->runtime;
3168 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3170 if (!iter_is_iovec(to))
3172 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
3174 if (!frame_aligned(runtime, to->iov->iov_len))
3176 frames = bytes_to_samples(runtime, to->iov->iov_len);
3177 bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL);
3180 for (i = 0; i < to->nr_segs; ++i)
3181 bufs[i] = to->iov[i].iov_base;
3182 result = snd_pcm_lib_readv(substream, bufs, frames);
3184 result = frames_to_bytes(runtime, result);
3189 static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
3191 struct snd_pcm_file *pcm_file;
3192 struct snd_pcm_substream *substream;
3193 struct snd_pcm_runtime *runtime;
3194 snd_pcm_sframes_t result;
3197 snd_pcm_uframes_t frames;
3199 pcm_file = iocb->ki_filp->private_data;
3200 substream = pcm_file->substream;
3201 if (PCM_RUNTIME_CHECK(substream))
3203 runtime = substream->runtime;
3204 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3206 if (!iter_is_iovec(from))
3208 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3209 !frame_aligned(runtime, from->iov->iov_len))
3211 frames = bytes_to_samples(runtime, from->iov->iov_len);
3212 bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL);
3215 for (i = 0; i < from->nr_segs; ++i)
3216 bufs[i] = from->iov[i].iov_base;
3217 result = snd_pcm_lib_writev(substream, bufs, frames);
3219 result = frames_to_bytes(runtime, result);
3224 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3226 struct snd_pcm_file *pcm_file;
3227 struct snd_pcm_substream *substream;
3228 struct snd_pcm_runtime *runtime;
3230 snd_pcm_uframes_t avail;
3232 pcm_file = file->private_data;
3234 substream = pcm_file->substream;
3235 if (PCM_RUNTIME_CHECK(substream))
3236 return POLLOUT | POLLWRNORM | POLLERR;
3237 runtime = substream->runtime;
3239 poll_wait(file, &runtime->sleep, wait);
3241 snd_pcm_stream_lock_irq(substream);
3242 avail = snd_pcm_playback_avail(runtime);
3243 switch (runtime->status->state) {
3244 case SNDRV_PCM_STATE_RUNNING:
3245 case SNDRV_PCM_STATE_PREPARED:
3246 case SNDRV_PCM_STATE_PAUSED:
3247 if (avail >= runtime->control->avail_min) {
3248 mask = POLLOUT | POLLWRNORM;
3252 case SNDRV_PCM_STATE_DRAINING:
3256 mask = POLLOUT | POLLWRNORM | POLLERR;
3259 snd_pcm_stream_unlock_irq(substream);
3263 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3265 struct snd_pcm_file *pcm_file;
3266 struct snd_pcm_substream *substream;
3267 struct snd_pcm_runtime *runtime;
3269 snd_pcm_uframes_t avail;
3271 pcm_file = file->private_data;
3273 substream = pcm_file->substream;
3274 if (PCM_RUNTIME_CHECK(substream))
3275 return POLLIN | POLLRDNORM | POLLERR;
3276 runtime = substream->runtime;
3278 poll_wait(file, &runtime->sleep, wait);
3280 snd_pcm_stream_lock_irq(substream);
3281 avail = snd_pcm_capture_avail(runtime);
3282 switch (runtime->status->state) {
3283 case SNDRV_PCM_STATE_RUNNING:
3284 case SNDRV_PCM_STATE_PREPARED:
3285 case SNDRV_PCM_STATE_PAUSED:
3286 if (avail >= runtime->control->avail_min) {
3287 mask = POLLIN | POLLRDNORM;
3292 case SNDRV_PCM_STATE_DRAINING:
3294 mask = POLLIN | POLLRDNORM;
3299 mask = POLLIN | POLLRDNORM | POLLERR;
3302 snd_pcm_stream_unlock_irq(substream);
3311 * Only on coherent architectures, we can mmap the status and the control records
3312 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3314 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3316 * mmap status record
3318 static int snd_pcm_mmap_status_fault(struct vm_fault *vmf)
3320 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3321 struct snd_pcm_runtime *runtime;
3323 if (substream == NULL)
3324 return VM_FAULT_SIGBUS;
3325 runtime = substream->runtime;
3326 vmf->page = virt_to_page(runtime->status);
3327 get_page(vmf->page);
3331 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3333 .fault = snd_pcm_mmap_status_fault,
3336 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3337 struct vm_area_struct *area)
3340 if (!(area->vm_flags & VM_READ))
3342 size = area->vm_end - area->vm_start;
3343 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3345 area->vm_ops = &snd_pcm_vm_ops_status;
3346 area->vm_private_data = substream;
3347 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3352 * mmap control record
3354 static int snd_pcm_mmap_control_fault(struct vm_fault *vmf)
3356 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3357 struct snd_pcm_runtime *runtime;
3359 if (substream == NULL)
3360 return VM_FAULT_SIGBUS;
3361 runtime = substream->runtime;
3362 vmf->page = virt_to_page(runtime->control);
3363 get_page(vmf->page);
3367 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3369 .fault = snd_pcm_mmap_control_fault,
3372 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3373 struct vm_area_struct *area)
3376 if (!(area->vm_flags & VM_READ))
3378 size = area->vm_end - area->vm_start;
3379 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3381 area->vm_ops = &snd_pcm_vm_ops_control;
3382 area->vm_private_data = substream;
3383 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3387 static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3389 if (pcm_file->no_compat_mmap)
3391 /* See pcm_control_mmap_allowed() below.
3392 * Since older alsa-lib requires both status and control mmaps to be
3393 * coupled, we have to disable the status mmap for old alsa-lib, too.
3395 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3396 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3401 static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3403 if (pcm_file->no_compat_mmap)
3405 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
3406 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3407 * thus it effectively assures the manual update of appl_ptr.
3409 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3414 #else /* ! coherent mmap */
3416 * don't support mmap for status and control records.
3418 #define pcm_status_mmap_allowed(pcm_file) false
3419 #define pcm_control_mmap_allowed(pcm_file) false
3421 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3422 struct vm_area_struct *area)
3426 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3427 struct vm_area_struct *area)
3431 #endif /* coherent mmap */
3433 static inline struct page *
3434 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3436 void *vaddr = substream->runtime->dma_area + ofs;
3437 return virt_to_page(vaddr);
3441 * fault callback for mmapping a RAM page
3443 static int snd_pcm_mmap_data_fault(struct vm_fault *vmf)
3445 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3446 struct snd_pcm_runtime *runtime;
3447 unsigned long offset;
3451 if (substream == NULL)
3452 return VM_FAULT_SIGBUS;
3453 runtime = substream->runtime;
3454 offset = vmf->pgoff << PAGE_SHIFT;
3455 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3456 if (offset > dma_bytes - PAGE_SIZE)
3457 return VM_FAULT_SIGBUS;
3458 if (substream->ops->page)
3459 page = substream->ops->page(substream, offset);
3461 page = snd_pcm_default_page_ops(substream, offset);
3463 return VM_FAULT_SIGBUS;
3469 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3470 .open = snd_pcm_mmap_data_open,
3471 .close = snd_pcm_mmap_data_close,
3474 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3475 .open = snd_pcm_mmap_data_open,
3476 .close = snd_pcm_mmap_data_close,
3477 .fault = snd_pcm_mmap_data_fault,
3481 * mmap the DMA buffer on RAM
3485 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3486 * @substream: PCM substream
3489 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3490 * this function is invoked implicitly.
3492 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3493 struct vm_area_struct *area)
3495 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3496 #ifdef CONFIG_GENERIC_ALLOCATOR
3497 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3498 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3499 return remap_pfn_range(area, area->vm_start,
3500 substream->dma_buffer.addr >> PAGE_SHIFT,
3501 area->vm_end - area->vm_start, area->vm_page_prot);
3503 #endif /* CONFIG_GENERIC_ALLOCATOR */
3504 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3505 if (!substream->ops->page &&
3506 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3507 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3509 substream->runtime->dma_area,
3510 substream->runtime->dma_addr,
3511 area->vm_end - area->vm_start);
3512 #endif /* CONFIG_X86 */
3513 /* mmap with fault handler */
3514 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3517 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3520 * mmap the DMA buffer on I/O memory area
3522 #if SNDRV_PCM_INFO_MMAP_IOMEM
3524 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3525 * @substream: PCM substream
3528 * When your hardware uses the iomapped pages as the hardware buffer and
3529 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3530 * is supposed to work only on limited architectures.
3532 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3533 struct vm_area_struct *area)
3535 struct snd_pcm_runtime *runtime = substream->runtime;;
3537 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3538 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3540 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3541 #endif /* SNDRV_PCM_INFO_MMAP */
3546 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3547 struct vm_area_struct *area)
3549 struct snd_pcm_runtime *runtime;
3551 unsigned long offset;
3555 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3556 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3559 if (!(area->vm_flags & VM_READ))
3562 runtime = substream->runtime;
3563 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3565 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3567 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3568 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3570 size = area->vm_end - area->vm_start;
3571 offset = area->vm_pgoff << PAGE_SHIFT;
3572 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3573 if ((size_t)size > dma_bytes)
3575 if (offset > dma_bytes - size)
3578 area->vm_ops = &snd_pcm_vm_ops_data;
3579 area->vm_private_data = substream;
3580 if (substream->ops->mmap)
3581 err = substream->ops->mmap(substream, area);
3583 err = snd_pcm_lib_default_mmap(substream, area);
3585 atomic_inc(&substream->mmap_count);
3588 EXPORT_SYMBOL(snd_pcm_mmap_data);
3590 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3592 struct snd_pcm_file * pcm_file;
3593 struct snd_pcm_substream *substream;
3594 unsigned long offset;
3596 pcm_file = file->private_data;
3597 substream = pcm_file->substream;
3598 if (PCM_RUNTIME_CHECK(substream))
3601 offset = area->vm_pgoff << PAGE_SHIFT;
3603 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3604 if (!pcm_status_mmap_allowed(pcm_file))
3606 return snd_pcm_mmap_status(substream, file, area);
3607 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3608 if (!pcm_control_mmap_allowed(pcm_file))
3610 return snd_pcm_mmap_control(substream, file, area);
3612 return snd_pcm_mmap_data(substream, file, area);
3617 static int snd_pcm_fasync(int fd, struct file * file, int on)
3619 struct snd_pcm_file * pcm_file;
3620 struct snd_pcm_substream *substream;
3621 struct snd_pcm_runtime *runtime;
3623 pcm_file = file->private_data;
3624 substream = pcm_file->substream;
3625 if (PCM_RUNTIME_CHECK(substream))
3627 runtime = substream->runtime;
3628 return fasync_helper(fd, file, on, &runtime->fasync);
3634 #ifdef CONFIG_COMPAT
3635 #include "pcm_compat.c"
3637 #define snd_pcm_ioctl_compat NULL
3641 * To be removed helpers to keep binary compatibility
3644 #ifdef CONFIG_SND_SUPPORT_OLD_API
3645 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3646 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3648 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3649 struct snd_pcm_hw_params_old *oparams)
3653 memset(params, 0, sizeof(*params));
3654 params->flags = oparams->flags;
3655 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3656 params->masks[i].bits[0] = oparams->masks[i];
3657 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3658 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3659 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3660 params->info = oparams->info;
3661 params->msbits = oparams->msbits;
3662 params->rate_num = oparams->rate_num;
3663 params->rate_den = oparams->rate_den;
3664 params->fifo_size = oparams->fifo_size;
3667 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3668 struct snd_pcm_hw_params *params)
3672 memset(oparams, 0, sizeof(*oparams));
3673 oparams->flags = params->flags;
3674 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3675 oparams->masks[i] = params->masks[i].bits[0];
3676 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3677 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3678 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3679 oparams->info = params->info;
3680 oparams->msbits = params->msbits;
3681 oparams->rate_num = params->rate_num;
3682 oparams->rate_den = params->rate_den;
3683 oparams->fifo_size = params->fifo_size;
3686 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3687 struct snd_pcm_hw_params_old __user * _oparams)
3689 struct snd_pcm_hw_params *params;
3690 struct snd_pcm_hw_params_old *oparams = NULL;
3693 params = kmalloc(sizeof(*params), GFP_KERNEL);
3697 oparams = memdup_user(_oparams, sizeof(*oparams));
3698 if (IS_ERR(oparams)) {
3699 err = PTR_ERR(oparams);
3702 snd_pcm_hw_convert_from_old_params(params, oparams);
3703 err = snd_pcm_hw_refine(substream, params);
3707 err = fixup_unreferenced_params(substream, params);
3711 snd_pcm_hw_convert_to_old_params(oparams, params);
3712 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3721 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3722 struct snd_pcm_hw_params_old __user * _oparams)
3724 struct snd_pcm_hw_params *params;
3725 struct snd_pcm_hw_params_old *oparams = NULL;
3728 params = kmalloc(sizeof(*params), GFP_KERNEL);
3732 oparams = memdup_user(_oparams, sizeof(*oparams));
3733 if (IS_ERR(oparams)) {
3734 err = PTR_ERR(oparams);
3738 snd_pcm_hw_convert_from_old_params(params, oparams);
3739 err = snd_pcm_hw_params(substream, params);
3743 snd_pcm_hw_convert_to_old_params(oparams, params);
3744 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3752 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3755 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3758 unsigned long pgoff,
3759 unsigned long flags)
3761 struct snd_pcm_file *pcm_file = file->private_data;
3762 struct snd_pcm_substream *substream = pcm_file->substream;
3763 struct snd_pcm_runtime *runtime = substream->runtime;
3764 unsigned long offset = pgoff << PAGE_SHIFT;
3767 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3768 return (unsigned long)runtime->status;
3769 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3770 return (unsigned long)runtime->control;
3772 return (unsigned long)runtime->dma_area + offset;
3776 # define snd_pcm_get_unmapped_area NULL
3783 const struct file_operations snd_pcm_f_ops[2] = {
3785 .owner = THIS_MODULE,
3786 .write = snd_pcm_write,
3787 .write_iter = snd_pcm_writev,
3788 .open = snd_pcm_playback_open,
3789 .release = snd_pcm_release,
3790 .llseek = no_llseek,
3791 .poll = snd_pcm_playback_poll,
3792 .unlocked_ioctl = snd_pcm_playback_ioctl,
3793 .compat_ioctl = snd_pcm_ioctl_compat,
3794 .mmap = snd_pcm_mmap,
3795 .fasync = snd_pcm_fasync,
3796 .get_unmapped_area = snd_pcm_get_unmapped_area,
3799 .owner = THIS_MODULE,
3800 .read = snd_pcm_read,
3801 .read_iter = snd_pcm_readv,
3802 .open = snd_pcm_capture_open,
3803 .release = snd_pcm_release,
3804 .llseek = no_llseek,
3805 .poll = snd_pcm_capture_poll,
3806 .unlocked_ioctl = snd_pcm_capture_ioctl,
3807 .compat_ioctl = snd_pcm_ioctl_compat,
3808 .mmap = snd_pcm_mmap,
3809 .fasync = snd_pcm_fasync,
3810 .get_unmapped_area = snd_pcm_get_unmapped_area,