blob: 860543a4c840207cda8e4a8c3ec873868b27b8ed [file] [log] [blame]
Thomas Gleixner1a59d1b82019-05-27 08:55:05 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * Digital Audio (PCM) abstract layer
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02004 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 */
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/mm.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -04008#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/file.h>
10#include <linux/slab.h>
Ingo Molnar174cd4b2017-02-02 19:15:33 +010011#include <linux/sched/signal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/time.h>
Jean Pihete8db0be2011-08-25 15:35:03 +020013#include <linux/pm_qos.h>
Takashi Iwai6cbbfe12015-01-28 16:49:33 +010014#include <linux/io.h>
Takashi Iwai657b1982009-11-26 12:40:21 +010015#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <sound/core.h>
17#include <sound/control.h>
18#include <sound/info.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/timer.h>
22#include <sound/minors.h>
Christoph Hellwige2e40f22015-02-22 08:58:50 -080023#include <linux/uio.h>
Chanho Minb888a5f72018-11-26 14:36:37 +090024#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Takashi Sakamoto2c4842d2017-05-26 09:30:46 +090026#include "pcm_local.h"
27
Takashi Sakamoto37567c52017-06-07 08:46:44 +090028#ifdef CONFIG_SND_DEBUG
Takashi Sakamotobe4e31d2017-06-07 08:46:43 +090029#define CREATE_TRACE_POINTS
30#include "pcm_param_trace.h"
Takashi Sakamoto37567c52017-06-07 08:46:44 +090031#else
32#define trace_hw_mask_param_enabled() 0
33#define trace_hw_interval_param_enabled() 0
34#define trace_hw_mask_param(substream, type, index, prev, curr)
35#define trace_hw_interval_param(substream, type, index, prev, curr)
36#endif
Takashi Sakamotobe4e31d2017-06-07 08:46:43 +090037
Linus Torvalds1da177e2005-04-16 15:20:36 -070038/*
39 * Compatibility
40 */
41
Takashi Iwai877211f2005-11-17 13:59:38 +010042struct snd_pcm_hw_params_old {
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
Takashi Iwai877211f2005-11-17 13:59:38 +010046 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
Takashi Iwai877211f2005-11-17 13:59:38 +010054 snd_pcm_uframes_t fifo_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 unsigned char reserved[64];
56};
57
Takashi Iwai59d48582005-12-01 10:51:58 +010058#ifdef CONFIG_SND_SUPPORT_OLD_API
Takashi Iwai877211f2005-11-17 13:59:38 +010059#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Takashi Iwai877211f2005-11-17 13:59:38 +010062static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
Takashi Iwai59d48582005-12-01 10:51:58 +010066#endif
Clemens Ladischf87135f2005-11-20 14:06:59 +010067static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/*
70 *
71 */
72
Takashi Iwai7af142f2014-09-01 11:19:37 +020073static DECLARE_RWSEM(snd_pcm_link_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Takashi Iwai73365cb2019-01-13 09:35:17 +010075void snd_pcm_group_init(struct snd_pcm_group *group)
Takashi Iwai67ec10722016-02-17 14:30:26 +010076{
Takashi Iwai73365cb2019-01-13 09:35:17 +010077 spin_lock_init(&group->lock);
78 mutex_init(&group->mutex);
79 INIT_LIST_HEAD(&group->substreams);
Takashi Iwaif57f3df2019-01-13 09:50:33 +010080 refcount_set(&group->refs, 0);
Takashi Iwai67ec10722016-02-17 14:30:26 +010081}
82
Takashi Iwaif57f3df2019-01-13 09:50:33 +010083/* define group lock helpers */
84#define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
85static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
86{ \
87 if (nonatomic) \
88 mutex_ ## mutex_action(&group->mutex); \
89 else \
90 spin_ ## action(&group->lock); \
Anna-Maria Gleixner10aa7ca2018-05-04 17:28:10 +020091}
92
Takashi Iwaif57f3df2019-01-13 09:50:33 +010093DEFINE_PCM_GROUP_LOCK(lock, lock);
94DEFINE_PCM_GROUP_LOCK(unlock, unlock);
95DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
96DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
Anna-Maria Gleixner10aa7ca2018-05-04 17:28:10 +020097
Takashi Iwai30b771c2014-10-30 15:02:50 +010098/**
99 * snd_pcm_stream_lock - Lock the PCM stream
100 * @substream: PCM substream
101 *
102 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
103 * flag of the given substream. This also takes the global link rw lock
104 * (or rw sem), too, for avoiding the race with linked streams.
105 */
Takashi Iwai7af142f2014-09-01 11:19:37 +0200106void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
107{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100108 snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
Takashi Iwai7af142f2014-09-01 11:19:37 +0200109}
110EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
111
Takashi Iwai30b771c2014-10-30 15:02:50 +0100112/**
113 * snd_pcm_stream_lock - Unlock the PCM stream
114 * @substream: PCM substream
115 *
116 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
117 */
Takashi Iwai7af142f2014-09-01 11:19:37 +0200118void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
119{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100120 snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
Takashi Iwai7af142f2014-09-01 11:19:37 +0200121}
122EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
123
Takashi Iwai30b771c2014-10-30 15:02:50 +0100124/**
125 * snd_pcm_stream_lock_irq - Lock the PCM stream
126 * @substream: PCM substream
127 *
128 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
129 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
130 * as snd_pcm_stream_lock().
131 */
Takashi Iwai7af142f2014-09-01 11:19:37 +0200132void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
133{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100134 snd_pcm_group_lock_irq(&substream->self_group,
135 substream->pcm->nonatomic);
Takashi Iwai7af142f2014-09-01 11:19:37 +0200136}
137EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
138
Takashi Iwai30b771c2014-10-30 15:02:50 +0100139/**
140 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
141 * @substream: PCM substream
142 *
143 * This is a counter-part of snd_pcm_stream_lock_irq().
144 */
Takashi Iwai7af142f2014-09-01 11:19:37 +0200145void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
146{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100147 snd_pcm_group_unlock_irq(&substream->self_group,
148 substream->pcm->nonatomic);
Takashi Iwai7af142f2014-09-01 11:19:37 +0200149}
150EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
151
152unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
153{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100154 unsigned long flags = 0;
155 if (substream->pcm->nonatomic)
156 mutex_lock(&substream->self_group.mutex);
157 else
158 spin_lock_irqsave(&substream->self_group.lock, flags);
159 return flags;
Takashi Iwai7af142f2014-09-01 11:19:37 +0200160}
161EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
162
Takashi Iwai30b771c2014-10-30 15:02:50 +0100163/**
164 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
165 * @substream: PCM substream
166 * @flags: irq flags
167 *
168 * This is a counter-part of snd_pcm_stream_lock_irqsave().
169 */
Takashi Iwai7af142f2014-09-01 11:19:37 +0200170void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
171 unsigned long flags)
172{
Takashi Iwaief2056b2019-01-13 10:15:03 +0100173 if (substream->pcm->nonatomic)
174 mutex_unlock(&substream->self_group.mutex);
175 else
176 spin_unlock_irqrestore(&substream->self_group.lock, flags);
Takashi Iwai7af142f2014-09-01 11:19:37 +0200177}
178EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Takashi Iwai877211f2005-11-17 13:59:38 +0100180int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Takashi Iwai877211f2005-11-17 13:59:38 +0100182 struct snd_pcm *pcm = substream->pcm;
183 struct snd_pcm_str *pstr = substream->pstr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 memset(info, 0, sizeof(*info));
186 info->card = pcm->card->number;
187 info->device = pcm->device;
188 info->stream = substream->stream;
189 info->subdevice = substream->number;
190 strlcpy(info->id, pcm->id, sizeof(info->id));
191 strlcpy(info->name, pcm->name, sizeof(info->name));
192 info->dev_class = pcm->dev_class;
193 info->dev_subclass = pcm->dev_subclass;
194 info->subdevices_count = pstr->substream_count;
195 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
196 strlcpy(info->subname, substream->name, sizeof(info->subname));
Takashi Sakamotoe11f0f92017-06-14 19:30:03 +0900197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 return 0;
199}
200
Takashi Iwai877211f2005-11-17 13:59:38 +0100201int snd_pcm_info_user(struct snd_pcm_substream *substream,
202 struct snd_pcm_info __user * _info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Takashi Iwai877211f2005-11-17 13:59:38 +0100204 struct snd_pcm_info *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 int err;
206
207 info = kmalloc(sizeof(*info), GFP_KERNEL);
208 if (! info)
209 return -ENOMEM;
210 err = snd_pcm_info(substream, info);
211 if (err >= 0) {
212 if (copy_to_user(_info, info, sizeof(*info)))
213 err = -EFAULT;
214 }
215 kfree(info);
216 return err;
217}
218
Takashi Iwai63825f32014-10-22 12:04:46 +0200219static bool hw_support_mmap(struct snd_pcm_substream *substream)
220{
221 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
222 return false;
Takashi Iwai85dc0f82017-07-10 16:05:58 +0200223 /* architecture supports dma_mmap_coherent()? */
224#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
Takashi Iwai63825f32014-10-22 12:04:46 +0200225 if (!substream->ops->mmap &&
226 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
227 return false;
228#endif
229 return true;
230}
231
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900232static int constrain_mask_params(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900235 struct snd_pcm_hw_constraints *constrs =
236 &substream->runtime->hw_constraints;
237 struct snd_mask *m;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 unsigned int k;
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900239 struct snd_mask old_mask;
240 int changed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
243 m = hw_param_mask(params, k);
244 if (snd_mask_empty(m))
245 return -EINVAL;
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900246
247 /* This parameter is not requested to change by a caller. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 if (!(params->rmask & (1 << k)))
249 continue;
Takashi Sakamotobe4e31d2017-06-07 08:46:43 +0900250
251 if (trace_hw_mask_param_enabled())
252 old_mask = *m;
Takashi Sakamotoc6706de2017-06-07 08:46:45 +0900253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 changed = snd_mask_refine(m, constrs_mask(constrs, k));
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900255 if (changed < 0)
256 return changed;
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900257 if (changed == 0)
258 continue;
Takashi Sakamotobe4e31d2017-06-07 08:46:43 +0900259
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900260 /* Set corresponding flag so that the caller gets it. */
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900261 trace_hw_mask_param(substream, k, 0, &old_mask, m);
262 params->cmask |= 1 << k;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 }
264
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900265 return 0;
266}
267
Takashi Sakamoto3432fa02017-06-09 06:37:00 +0900268static int constrain_interval_params(struct snd_pcm_substream *substream,
269 struct snd_pcm_hw_params *params)
270{
271 struct snd_pcm_hw_constraints *constrs =
272 &substream->runtime->hw_constraints;
273 struct snd_interval *i;
274 unsigned int k;
275 struct snd_interval old_interval;
276 int changed;
277
278 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
279 i = hw_param_interval(params, k);
280 if (snd_interval_empty(i))
281 return -EINVAL;
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900282
283 /* This parameter is not requested to change by a caller. */
Takashi Sakamoto3432fa02017-06-09 06:37:00 +0900284 if (!(params->rmask & (1 << k)))
285 continue;
286
287 if (trace_hw_interval_param_enabled())
288 old_interval = *i;
289
290 changed = snd_interval_refine(i, constrs_interval(constrs, k));
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900291 if (changed < 0)
292 return changed;
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900293 if (changed == 0)
294 continue;
Takashi Sakamoto3432fa02017-06-09 06:37:00 +0900295
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900296 /* Set corresponding flag so that the caller gets it. */
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900297 trace_hw_interval_param(substream, k, 0, &old_interval, i);
298 params->cmask |= 1 << k;
Takashi Sakamoto3432fa02017-06-09 06:37:00 +0900299 }
300
301 return 0;
302}
303
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900304static int constrain_params_by_rules(struct snd_pcm_substream *substream,
305 struct snd_pcm_hw_params *params)
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900306{
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900307 struct snd_pcm_hw_constraints *constrs =
308 &substream->runtime->hw_constraints;
Takashi Sakamoto561e1ca2017-06-09 06:36:59 +0900309 unsigned int k;
Takashi Iwai5730f9f2018-03-13 11:18:57 +0100310 unsigned int *rstamps;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900312 unsigned int stamp;
Takashi Sakamotoa1c06e32017-06-09 06:37:04 +0900313 struct snd_pcm_hw_rule *r;
314 unsigned int d;
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900315 struct snd_mask old_mask;
316 struct snd_interval old_interval;
Takashi Sakamotoa1c06e32017-06-09 06:37:04 +0900317 bool again;
Takashi Iwai5730f9f2018-03-13 11:18:57 +0100318 int changed, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900320 /*
321 * Each application of rule has own sequence number.
322 *
323 * Each member of 'rstamps' array represents the sequence number of
324 * recent application of corresponding rule.
325 */
Takashi Iwai5730f9f2018-03-13 11:18:57 +0100326 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
327 if (!rstamps)
328 return -ENOMEM;
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900329
330 /*
331 * Each member of 'vstamps' array represents the sequence number of
332 * recent application of rule in which corresponding parameters were
333 * changed.
334 *
335 * In initial state, elements corresponding to parameters requested by
336 * a caller is 1. For unrequested parameters, corresponding members
337 * have 0 so that the parameters are never changed anymore.
338 */
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900339 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900341
342 /* Due to the above design, actual sequence number starts at 2. */
343 stamp = 2;
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900344retry:
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900345 /* Apply all rules in order. */
Takashi Sakamotoa1c06e32017-06-09 06:37:04 +0900346 again = false;
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900347 for (k = 0; k < constrs->rules_num; k++) {
Takashi Sakamotoa1c06e32017-06-09 06:37:04 +0900348 r = &constrs->rules[k];
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900349
350 /*
351 * Check condition bits of this rule. When the rule has
352 * some condition bits, parameter without the bits is
353 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
354 * is an example of the condition bits.
355 */
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900356 if (r->cond && !(r->cond & params->flags))
357 continue;
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900358
359 /*
360 * The 'deps' array includes maximum three dependencies
361 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
362 * member of this array is a sentinel and should be
363 * negative value.
364 *
365 * This rule should be processed in this time when dependent
366 * parameters were changed at former applications of the other
367 * rules.
368 */
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900369 for (d = 0; r->deps[d] >= 0; d++) {
Takashi Sakamotod656b4a2017-06-09 06:37:03 +0900370 if (vstamps[r->deps[d]] > rstamps[k])
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900371 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 }
Takashi Sakamotod656b4a2017-06-09 06:37:03 +0900373 if (r->deps[d] < 0)
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900374 continue;
375
376 if (trace_hw_mask_param_enabled()) {
377 if (hw_is_mask(r->var))
378 old_mask = *hw_param_mask(params, r->var);
379 }
380 if (trace_hw_interval_param_enabled()) {
381 if (hw_is_interval(r->var))
382 old_interval = *hw_param_interval(params, r->var);
383 }
384
385 changed = r->func(params, r);
Takashi Iwai5730f9f2018-03-13 11:18:57 +0100386 if (changed < 0) {
387 err = changed;
388 goto out;
389 }
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900390
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900391 /*
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900392 * When the parameter is changed, notify it to the caller
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900393 * by corresponding returned bit, then preparing for next
394 * iteration.
395 */
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900396 if (changed && r->var >= 0) {
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900397 if (hw_is_mask(r->var)) {
398 trace_hw_mask_param(substream, r->var,
399 k + 1, &old_mask,
400 hw_param_mask(params, r->var));
401 }
402 if (hw_is_interval(r->var)) {
403 trace_hw_interval_param(substream, r->var,
404 k + 1, &old_interval,
405 hw_param_interval(params, r->var));
406 }
407
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900408 params->cmask |= (1 << r->var);
409 vstamps[r->var] = stamp;
Takashi Sakamotoa1c06e32017-06-09 06:37:04 +0900410 again = true;
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900411 }
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900412
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900413 rstamps[k] = stamp++;
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900414 }
415
Takashi Sakamotod81052f2017-06-09 06:37:06 +0900416 /* Iterate to evaluate all rules till no parameters are changed. */
Takashi Sakamoto0d4e3992017-06-09 06:37:02 +0900417 if (again)
418 goto retry;
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900419
Takashi Iwai5730f9f2018-03-13 11:18:57 +0100420 out:
421 kfree(rstamps);
422 return err;
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900423}
424
Takashi Sakamotof9a076b2017-06-09 09:34:39 +0900425static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
426 struct snd_pcm_hw_params *params)
427{
428 const struct snd_interval *i;
429 const struct snd_mask *m;
430 int err;
431
432 if (!params->msbits) {
433 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
434 if (snd_interval_single(i))
435 params->msbits = snd_interval_value(i);
436 }
437
438 if (!params->rate_den) {
439 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
440 if (snd_interval_single(i)) {
441 params->rate_num = snd_interval_value(i);
442 params->rate_den = 1;
443 }
444 }
445
446 if (!params->fifo_size) {
447 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
448 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
449 if (snd_mask_single(m) && snd_interval_single(i)) {
450 err = substream->ops->ioctl(substream,
451 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
452 if (err < 0)
453 return err;
454 }
455 }
456
Takashi Sakamoto7802fb52017-06-09 09:34:40 +0900457 if (!params->info) {
458 params->info = substream->runtime->hw.info;
459 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
460 SNDRV_PCM_INFO_DRAIN_TRIGGER);
461 if (!hw_support_mmap(substream))
462 params->info &= ~(SNDRV_PCM_INFO_MMAP |
463 SNDRV_PCM_INFO_MMAP_VALID);
464 }
465
Takashi Sakamotof9a076b2017-06-09 09:34:39 +0900466 return 0;
467}
468
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900469int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params *params)
471{
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900472 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 params->info = 0;
475 params->fifo_size = 0;
476 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
477 params->msbits = 0;
478 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
479 params->rate_num = 0;
480 params->rate_den = 0;
481 }
482
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900483 err = constrain_mask_params(substream, params);
484 if (err < 0)
485 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900487 err = constrain_interval_params(substream, params);
488 if (err < 0)
489 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Takashi Sakamoto9cc07f52017-06-09 06:37:01 +0900491 err = constrain_params_by_rules(substream, params);
492 if (err < 0)
493 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 params->rmask = 0;
Takashi Sakamoto7802fb52017-06-09 09:34:40 +0900496
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 return 0;
498}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +0200499EXPORT_SYMBOL(snd_pcm_hw_refine);
500
Takashi Iwai877211f2005-11-17 13:59:38 +0100501static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
502 struct snd_pcm_hw_params __user * _params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503{
Takashi Iwai877211f2005-11-17 13:59:38 +0100504 struct snd_pcm_hw_params *params;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 int err;
506
Li Zefanef44a1e2009-04-10 09:43:08 +0800507 params = memdup_user(_params, sizeof(*params));
508 if (IS_ERR(params))
509 return PTR_ERR(params);
510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 err = snd_pcm_hw_refine(substream, params);
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900512 if (err < 0)
513 goto end;
Li Zefanef44a1e2009-04-10 09:43:08 +0800514
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900515 err = fixup_unreferenced_params(substream, params);
516 if (err < 0)
517 goto end;
518
519 if (copy_to_user(_params, params, sizeof(*params)))
520 err = -EFAULT;
521end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 kfree(params);
523 return err;
524}
525
Takashi Iwai9442e692006-09-30 23:27:19 -0700526static int period_to_usecs(struct snd_pcm_runtime *runtime)
527{
528 int usecs;
529
530 if (! runtime->rate)
531 return -1; /* invalid */
532
533 /* take 75% of period time as the deadline */
534 usecs = (750000 / runtime->rate) * runtime->period_size;
535 usecs += ((750000 % runtime->rate) * runtime->period_size) /
536 runtime->rate;
537
538 return usecs;
539}
540
Takashi Iwai9b0573c2012-10-12 15:07:34 +0200541static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
542{
543 snd_pcm_stream_lock_irq(substream);
544 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
545 substream->runtime->status->state = state;
546 snd_pcm_stream_unlock_irq(substream);
547}
548
Jie Yang90bbaf62015-10-16 17:57:46 +0800549static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
550 int event)
551{
552#ifdef CONFIG_SND_PCM_TIMER
553 if (substream->timer)
554 snd_timer_notify(substream->timer, event,
555 &substream->runtime->trigger_tstamp);
556#endif
557}
558
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900559/**
560 * snd_pcm_hw_param_choose - choose a configuration defined by @params
561 * @pcm: PCM instance
562 * @params: the hw_params instance
563 *
564 * Choose one configuration from configuration space defined by @params.
565 * The configuration chosen is that obtained fixing in this order:
566 * first access, first format, first subformat, min channels,
567 * min rate, min period time, max buffer size, min tick time
568 *
569 * Return: Zero if successful, or a negative error code on failure.
570 */
571static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
572 struct snd_pcm_hw_params *params)
573{
574 static const int vars[] = {
575 SNDRV_PCM_HW_PARAM_ACCESS,
576 SNDRV_PCM_HW_PARAM_FORMAT,
577 SNDRV_PCM_HW_PARAM_SUBFORMAT,
578 SNDRV_PCM_HW_PARAM_CHANNELS,
579 SNDRV_PCM_HW_PARAM_RATE,
580 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
581 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
582 SNDRV_PCM_HW_PARAM_TICK_TIME,
583 -1
584 };
585 const int *v;
Takashi Sakamoto7b8a54a2017-06-09 21:46:49 +0900586 struct snd_mask old_mask;
587 struct snd_interval old_interval;
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900588 int changed;
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900589
590 for (v = vars; *v != -1; v++) {
Takashi Sakamoto7b8a54a2017-06-09 21:46:49 +0900591 /* Keep old parameter to trace. */
592 if (trace_hw_mask_param_enabled()) {
593 if (hw_is_mask(*v))
594 old_mask = *hw_param_mask(params, *v);
595 }
596 if (trace_hw_interval_param_enabled()) {
597 if (hw_is_interval(*v))
598 old_interval = *hw_param_interval(params, *v);
599 }
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900600 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900601 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900602 else
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900603 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
Takashi Iwaie1a3a982018-04-09 17:12:16 +0200604 if (changed < 0)
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900605 return changed;
606 if (changed == 0)
607 continue;
Takashi Sakamoto7b8a54a2017-06-09 21:46:49 +0900608
Takashi Sakamoto82e7d502017-06-11 23:56:13 +0900609 /* Trace the changed parameter. */
Takashi Sakamoto7b8a54a2017-06-09 21:46:49 +0900610 if (hw_is_mask(*v)) {
611 trace_hw_mask_param(pcm, *v, 0, &old_mask,
612 hw_param_mask(params, *v));
613 }
614 if (hw_is_interval(*v)) {
615 trace_hw_interval_param(pcm, *v, 0, &old_interval,
616 hw_param_interval(params, *v));
617 }
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900618 }
Takashi Sakamoto7b8a54a2017-06-09 21:46:49 +0900619
Takashi Sakamoto60f96aa2017-06-09 21:46:48 +0900620 return 0;
621}
622
Takashi Iwai877211f2005-11-17 13:59:38 +0100623static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
624 struct snd_pcm_hw_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625{
Takashi Iwai877211f2005-11-17 13:59:38 +0100626 struct snd_pcm_runtime *runtime;
Takashi Iwai9442e692006-09-30 23:27:19 -0700627 int err, usecs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 unsigned int bits;
629 snd_pcm_uframes_t frames;
630
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200631 if (PCM_RUNTIME_CHECK(substream))
632 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 snd_pcm_stream_lock_irq(substream);
635 switch (runtime->status->state) {
636 case SNDRV_PCM_STATE_OPEN:
637 case SNDRV_PCM_STATE_SETUP:
638 case SNDRV_PCM_STATE_PREPARED:
639 break;
640 default:
641 snd_pcm_stream_unlock_irq(substream);
642 return -EBADFD;
643 }
644 snd_pcm_stream_unlock_irq(substream);
Takashi Iwai8eeaa2f2014-02-10 09:48:47 +0100645#if IS_ENABLED(CONFIG_SND_PCM_OSS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 if (!substream->oss.oss)
647#endif
Takashi Iwai9c323fc2006-04-28 15:13:41 +0200648 if (atomic_read(&substream->mmap_count))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 return -EBADFD;
650
651 params->rmask = ~0U;
652 err = snd_pcm_hw_refine(substream, params);
653 if (err < 0)
654 goto _error;
655
656 err = snd_pcm_hw_params_choose(substream, params);
657 if (err < 0)
658 goto _error;
659
Takashi Sakamotof9a076b2017-06-09 09:34:39 +0900660 err = fixup_unreferenced_params(substream, params);
661 if (err < 0)
662 goto _error;
663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 if (substream->ops->hw_params != NULL) {
665 err = substream->ops->hw_params(substream, params);
666 if (err < 0)
667 goto _error;
668 }
669
670 runtime->access = params_access(params);
671 runtime->format = params_format(params);
672 runtime->subformat = params_subformat(params);
673 runtime->channels = params_channels(params);
674 runtime->rate = params_rate(params);
675 runtime->period_size = params_period_size(params);
676 runtime->periods = params_periods(params);
677 runtime->buffer_size = params_buffer_size(params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 runtime->info = params->info;
679 runtime->rate_num = params->rate_num;
680 runtime->rate_den = params->rate_den;
Clemens Ladischab69a492010-11-15 10:46:23 +0100681 runtime->no_period_wakeup =
682 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
683 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685 bits = snd_pcm_format_physical_width(runtime->format);
686 runtime->sample_bits = bits;
687 bits *= runtime->channels;
688 runtime->frame_bits = bits;
689 frames = 1;
690 while (bits % 8 != 0) {
691 bits *= 2;
692 frames *= 2;
693 }
694 runtime->byte_align = bits / 8;
695 runtime->min_align = frames;
696
697 /* Default sw params */
698 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
699 runtime->period_step = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 runtime->control->avail_min = runtime->period_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 runtime->start_threshold = 1;
702 runtime->stop_threshold = runtime->buffer_size;
703 runtime->silence_threshold = 0;
704 runtime->silence_size = 0;
Clemens Ladischead40462010-05-21 09:15:59 +0200705 runtime->boundary = runtime->buffer_size;
706 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
707 runtime->boundary *= 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
709 snd_pcm_timer_resolution_change(substream);
Takashi Iwai9b0573c2012-10-12 15:07:34 +0200710 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
Takashi Iwai9442e692006-09-30 23:27:19 -0700711
James Bottomley82f68252010-07-05 22:53:06 +0200712 if (pm_qos_request_active(&substream->latency_pm_qos_req))
713 pm_qos_remove_request(&substream->latency_pm_qos_req);
Takashi Iwai9442e692006-09-30 23:27:19 -0700714 if ((usecs = period_to_usecs(runtime)) >= 0)
James Bottomley82f68252010-07-05 22:53:06 +0200715 pm_qos_add_request(&substream->latency_pm_qos_req,
716 PM_QOS_CPU_DMA_LATENCY, usecs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 return 0;
718 _error:
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300719 /* hardware might be unusable from this time,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 so we force application to retry to set
721 the correct hardware parameter settings */
Takashi Iwai9b0573c2012-10-12 15:07:34 +0200722 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 if (substream->ops->hw_free != NULL)
724 substream->ops->hw_free(substream);
725 return err;
726}
727
Takashi Iwai877211f2005-11-17 13:59:38 +0100728static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
729 struct snd_pcm_hw_params __user * _params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730{
Takashi Iwai877211f2005-11-17 13:59:38 +0100731 struct snd_pcm_hw_params *params;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 int err;
733
Li Zefanef44a1e2009-04-10 09:43:08 +0800734 params = memdup_user(_params, sizeof(*params));
735 if (IS_ERR(params))
736 return PTR_ERR(params);
737
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 err = snd_pcm_hw_params(substream, params);
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900739 if (err < 0)
740 goto end;
Li Zefanef44a1e2009-04-10 09:43:08 +0800741
Takashi Sakamotof74ae152017-06-11 23:56:12 +0900742 if (copy_to_user(_params, params, sizeof(*params)))
743 err = -EFAULT;
744end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 kfree(params);
746 return err;
747}
748
Takashi Iwai877211f2005-11-17 13:59:38 +0100749static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750{
Takashi Iwai877211f2005-11-17 13:59:38 +0100751 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 int result = 0;
753
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200754 if (PCM_RUNTIME_CHECK(substream))
755 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 snd_pcm_stream_lock_irq(substream);
758 switch (runtime->status->state) {
759 case SNDRV_PCM_STATE_SETUP:
760 case SNDRV_PCM_STATE_PREPARED:
761 break;
762 default:
763 snd_pcm_stream_unlock_irq(substream);
764 return -EBADFD;
765 }
766 snd_pcm_stream_unlock_irq(substream);
Takashi Iwai9c323fc2006-04-28 15:13:41 +0200767 if (atomic_read(&substream->mmap_count))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 return -EBADFD;
769 if (substream->ops->hw_free)
770 result = substream->ops->hw_free(substream);
Takashi Iwai9b0573c2012-10-12 15:07:34 +0200771 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
James Bottomley82f68252010-07-05 22:53:06 +0200772 pm_qos_remove_request(&substream->latency_pm_qos_req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return result;
774}
775
Takashi Iwai877211f2005-11-17 13:59:38 +0100776static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
777 struct snd_pcm_sw_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778{
Takashi Iwai877211f2005-11-17 13:59:38 +0100779 struct snd_pcm_runtime *runtime;
Jaroslav Kysela12509322010-01-07 15:36:31 +0100780 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200782 if (PCM_RUNTIME_CHECK(substream))
783 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 snd_pcm_stream_lock_irq(substream);
786 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
787 snd_pcm_stream_unlock_irq(substream);
788 return -EBADFD;
789 }
790 snd_pcm_stream_unlock_irq(substream);
791
Dan Carpenter145d92e2015-09-23 12:42:28 +0300792 if (params->tstamp_mode < 0 ||
793 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 return -EINVAL;
Takashi Iwai589008102014-07-16 17:45:27 +0200795 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
796 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
Takashi Iwai5646eda2014-07-10 09:50:19 +0200797 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 if (params->avail_min == 0)
799 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 if (params->silence_size >= runtime->boundary) {
801 if (params->silence_threshold != 0)
802 return -EINVAL;
803 } else {
804 if (params->silence_size > params->silence_threshold)
805 return -EINVAL;
806 if (params->silence_threshold > runtime->buffer_size)
807 return -EINVAL;
808 }
Jaroslav Kysela12509322010-01-07 15:36:31 +0100809 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 snd_pcm_stream_lock_irq(substream);
811 runtime->tstamp_mode = params->tstamp_mode;
Takashi Iwai589008102014-07-16 17:45:27 +0200812 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
813 runtime->tstamp_type = params->tstamp_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 runtime->period_step = params->period_step;
815 runtime->control->avail_min = params->avail_min;
816 runtime->start_threshold = params->start_threshold;
817 runtime->stop_threshold = params->stop_threshold;
818 runtime->silence_threshold = params->silence_threshold;
819 runtime->silence_size = params->silence_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 params->boundary = runtime->boundary;
821 if (snd_pcm_running(substream)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
823 runtime->silence_size > 0)
824 snd_pcm_playback_silence(substream, ULONG_MAX);
Jaroslav Kysela12509322010-01-07 15:36:31 +0100825 err = snd_pcm_update_state(substream, runtime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 }
827 snd_pcm_stream_unlock_irq(substream);
Jaroslav Kysela12509322010-01-07 15:36:31 +0100828 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829}
830
Takashi Iwai877211f2005-11-17 13:59:38 +0100831static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
832 struct snd_pcm_sw_params __user * _params)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833{
Takashi Iwai877211f2005-11-17 13:59:38 +0100834 struct snd_pcm_sw_params params;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 int err;
836 if (copy_from_user(&params, _params, sizeof(params)))
837 return -EFAULT;
838 err = snd_pcm_sw_params(substream, &params);
839 if (copy_to_user(_params, &params, sizeof(params)))
840 return -EFAULT;
841 return err;
842}
843
Takashi Iwaic99c5a32018-04-11 18:07:27 +0200844static inline snd_pcm_uframes_t
845snd_pcm_calc_delay(struct snd_pcm_substream *substream)
846{
847 snd_pcm_uframes_t delay;
848
849 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
850 delay = snd_pcm_playback_hw_avail(substream->runtime);
851 else
852 delay = snd_pcm_capture_avail(substream->runtime);
853 return delay + substream->runtime->delay;
854}
855
Takashi Iwai877211f2005-11-17 13:59:38 +0100856int snd_pcm_status(struct snd_pcm_substream *substream,
857 struct snd_pcm_status *status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
Takashi Iwai877211f2005-11-17 13:59:38 +0100859 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 snd_pcm_stream_lock_irq(substream);
Pierre-Louis Bossart3179f622015-02-13 15:14:06 -0600862
863 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
864 &runtime->audio_tstamp_config);
865
866 /* backwards compatible behavior */
867 if (runtime->audio_tstamp_config.type_requested ==
868 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
869 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
870 runtime->audio_tstamp_config.type_requested =
871 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
872 else
873 runtime->audio_tstamp_config.type_requested =
874 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
875 runtime->audio_tstamp_report.valid = 0;
876 } else
877 runtime->audio_tstamp_report.valid = 1;
878
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 status->state = runtime->status->state;
880 status->suspended_state = runtime->status->suspended_state;
881 if (status->state == SNDRV_PCM_STATE_OPEN)
882 goto _end;
883 status->trigger_tstamp = runtime->trigger_tstamp;
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100884 if (snd_pcm_running(substream)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 snd_pcm_update_hw_ptr(substream);
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100886 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
887 status->tstamp = runtime->status->tstamp;
Pierre-Louis Bossart3179f622015-02-13 15:14:06 -0600888 status->driver_tstamp = runtime->driver_tstamp;
Pierre-Louis Bossart4eeaaea2012-10-22 16:42:15 -0500889 status->audio_tstamp =
890 runtime->status->audio_tstamp;
Pierre-Louis Bossart3179f622015-02-13 15:14:06 -0600891 if (runtime->audio_tstamp_report.valid == 1)
892 /* backwards compatibility, no report provided in COMPAT mode */
893 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
894 &status->audio_tstamp_accuracy,
895 &runtime->audio_tstamp_report);
896
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100897 goto _tstamp_end;
898 }
Pierre-Louis Bossart0d59b812015-02-06 15:55:50 -0600899 } else {
900 /* get tstamp only in fallback mode and only if enabled */
901 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
902 snd_pcm_gettime(runtime, &status->tstamp);
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100903 }
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100904 _tstamp_end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 status->appl_ptr = runtime->control->appl_ptr;
906 status->hw_ptr = runtime->status->hw_ptr;
Takashi Iwai763e5062018-04-11 17:56:52 +0200907 status->avail = snd_pcm_avail(substream);
Takashi Iwaic99c5a32018-04-11 18:07:27 +0200908 status->delay = snd_pcm_running(substream) ?
909 snd_pcm_calc_delay(substream) : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 status->avail_max = runtime->avail_max;
911 status->overrange = runtime->overrange;
912 runtime->avail_max = 0;
913 runtime->overrange = 0;
914 _end:
915 snd_pcm_stream_unlock_irq(substream);
916 return 0;
917}
918
Takashi Iwai877211f2005-11-17 13:59:38 +0100919static int snd_pcm_status_user(struct snd_pcm_substream *substream,
Pierre-Louis Bossart38ca2a42015-02-13 15:14:04 -0600920 struct snd_pcm_status __user * _status,
921 bool ext)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922{
Takashi Iwai877211f2005-11-17 13:59:38 +0100923 struct snd_pcm_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 int res;
Pierre-Louis Bossart38ca2a42015-02-13 15:14:04 -0600925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 memset(&status, 0, sizeof(status));
Pierre-Louis Bossart38ca2a42015-02-13 15:14:04 -0600927 /*
928 * with extension, parameters are read/write,
929 * get audio_tstamp_data from user,
930 * ignore rest of status structure
931 */
932 if (ext && get_user(status.audio_tstamp_data,
933 (u32 __user *)(&_status->audio_tstamp_data)))
934 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 res = snd_pcm_status(substream, &status);
936 if (res < 0)
937 return res;
938 if (copy_to_user(_status, &status, sizeof(status)))
939 return -EFAULT;
940 return 0;
941}
942
Takashi Iwai877211f2005-11-17 13:59:38 +0100943static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
944 struct snd_pcm_channel_info * info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945{
Takashi Iwai877211f2005-11-17 13:59:38 +0100946 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 unsigned int channel;
948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 channel = info->channel;
950 runtime = substream->runtime;
951 snd_pcm_stream_lock_irq(substream);
952 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
953 snd_pcm_stream_unlock_irq(substream);
954 return -EBADFD;
955 }
956 snd_pcm_stream_unlock_irq(substream);
957 if (channel >= runtime->channels)
958 return -EINVAL;
959 memset(info, 0, sizeof(*info));
960 info->channel = channel;
961 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
962}
963
Takashi Iwai877211f2005-11-17 13:59:38 +0100964static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
965 struct snd_pcm_channel_info __user * _info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966{
Takashi Iwai877211f2005-11-17 13:59:38 +0100967 struct snd_pcm_channel_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 int res;
969
970 if (copy_from_user(&info, _info, sizeof(info)))
971 return -EFAULT;
972 res = snd_pcm_channel_info(substream, &info);
973 if (res < 0)
974 return res;
975 if (copy_to_user(_info, &info, sizeof(info)))
976 return -EFAULT;
977 return 0;
978}
979
Takashi Iwai877211f2005-11-17 13:59:38 +0100980static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981{
Takashi Iwai877211f2005-11-17 13:59:38 +0100982 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 if (runtime->trigger_master == NULL)
984 return;
985 if (runtime->trigger_master == substream) {
Pierre-Louis Bossart2b79d7a2015-02-06 15:55:51 -0600986 if (!runtime->trigger_tstamp_latched)
987 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 } else {
989 snd_pcm_trigger_tstamp(runtime->trigger_master);
990 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
991 }
992 runtime->trigger_master = NULL;
993}
994
995struct action_ops {
Takashi Iwai877211f2005-11-17 13:59:38 +0100996 int (*pre_action)(struct snd_pcm_substream *substream, int state);
997 int (*do_action)(struct snd_pcm_substream *substream, int state);
998 void (*undo_action)(struct snd_pcm_substream *substream, int state);
999 void (*post_action)(struct snd_pcm_substream *substream, int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000};
1001
1002/*
1003 * this functions is core for handling of linked stream
1004 * Note: the stream state might be changed also on failure
1005 * Note2: call with calling stream lock + link lock
1006 */
Julia Lawallb17154c2015-11-29 16:36:40 +01001007static int snd_pcm_action_group(const struct action_ops *ops,
Takashi Iwai877211f2005-11-17 13:59:38 +01001008 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 int state, int do_lock)
1010{
Takashi Iwai877211f2005-11-17 13:59:38 +01001011 struct snd_pcm_substream *s = NULL;
1012 struct snd_pcm_substream *s1;
Takashi Iwaidde1c652014-10-21 15:32:13 +02001013 int res = 0, depth = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
Takashi Iwaief991b92007-02-22 12:52:53 +01001015 snd_pcm_group_for_each_entry(s, substream) {
Takashi Iwai257f8cc2014-08-29 15:32:29 +02001016 if (do_lock && s != substream) {
1017 if (s->pcm->nonatomic)
Takashi Iwaidde1c652014-10-21 15:32:13 +02001018 mutex_lock_nested(&s->self_group.mutex, depth);
Takashi Iwai257f8cc2014-08-29 15:32:29 +02001019 else
Takashi Iwaidde1c652014-10-21 15:32:13 +02001020 spin_lock_nested(&s->self_group.lock, depth);
1021 depth++;
Takashi Iwai257f8cc2014-08-29 15:32:29 +02001022 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 res = ops->pre_action(s, state);
1024 if (res < 0)
1025 goto _unlock;
1026 }
Takashi Iwaief991b92007-02-22 12:52:53 +01001027 snd_pcm_group_for_each_entry(s, substream) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 res = ops->do_action(s, state);
1029 if (res < 0) {
1030 if (ops->undo_action) {
Takashi Iwaief991b92007-02-22 12:52:53 +01001031 snd_pcm_group_for_each_entry(s1, substream) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 if (s1 == s) /* failed stream */
1033 break;
1034 ops->undo_action(s1, state);
1035 }
1036 }
1037 s = NULL; /* unlock all */
1038 goto _unlock;
1039 }
1040 }
Takashi Iwaief991b92007-02-22 12:52:53 +01001041 snd_pcm_group_for_each_entry(s, substream) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 ops->post_action(s, state);
1043 }
1044 _unlock:
1045 if (do_lock) {
1046 /* unlock streams */
Takashi Iwaief991b92007-02-22 12:52:53 +01001047 snd_pcm_group_for_each_entry(s1, substream) {
Takashi Iwai257f8cc2014-08-29 15:32:29 +02001048 if (s1 != substream) {
Takashi Iwai811deed2014-10-13 23:14:46 +02001049 if (s1->pcm->nonatomic)
Takashi Iwai257f8cc2014-08-29 15:32:29 +02001050 mutex_unlock(&s1->self_group.mutex);
1051 else
1052 spin_unlock(&s1->self_group.lock);
1053 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 if (s1 == s) /* end */
1055 break;
1056 }
1057 }
1058 return res;
1059}
1060
1061/*
1062 * Note: call with stream lock
1063 */
Julia Lawallb17154c2015-11-29 16:36:40 +01001064static int snd_pcm_action_single(const struct action_ops *ops,
Takashi Iwai877211f2005-11-17 13:59:38 +01001065 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 int state)
1067{
1068 int res;
1069
1070 res = ops->pre_action(substream, state);
1071 if (res < 0)
1072 return res;
1073 res = ops->do_action(substream, state);
1074 if (res == 0)
1075 ops->post_action(substream, state);
1076 else if (ops->undo_action)
1077 ops->undo_action(substream, state);
1078 return res;
1079}
1080
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01001081static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1082 struct snd_pcm_group *new_group)
1083{
1084 substream->group = new_group;
1085 list_move(&substream->link_list, &new_group->substreams);
1086}
1087
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088/*
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001089 * Unref and unlock the group, but keep the stream lock;
1090 * when the group becomes empty and no longer referred, destroy itself
1091 */
1092static void snd_pcm_group_unref(struct snd_pcm_group *group,
1093 struct snd_pcm_substream *substream)
1094{
1095 bool do_free;
1096
1097 if (!group)
1098 return;
1099 do_free = refcount_dec_and_test(&group->refs) &&
1100 list_empty(&group->substreams);
1101 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1102 if (do_free)
1103 kfree(group);
1104}
1105
1106/*
1107 * Lock the group inside a stream lock and reference it;
1108 * return the locked group object, or NULL if not linked
1109 */
1110static struct snd_pcm_group *
1111snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1112{
1113 bool nonatomic = substream->pcm->nonatomic;
1114 struct snd_pcm_group *group;
1115 bool trylock;
1116
1117 for (;;) {
1118 if (!snd_pcm_stream_linked(substream))
1119 return NULL;
1120 group = substream->group;
1121 /* block freeing the group object */
1122 refcount_inc(&group->refs);
1123
1124 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1125 spin_trylock(&group->lock);
1126 if (trylock)
1127 break; /* OK */
1128
1129 /* re-lock for avoiding ABBA deadlock */
1130 snd_pcm_stream_unlock(substream);
1131 snd_pcm_group_lock(group, nonatomic);
1132 snd_pcm_stream_lock(substream);
1133
1134 /* check the group again; the above opens a small race window */
1135 if (substream->group == group)
1136 break; /* OK */
1137 /* group changed, try again */
1138 snd_pcm_group_unref(group, substream);
1139 }
1140 return group;
1141}
1142
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143/*
1144 * Note: call with stream lock
1145 */
Julia Lawallb17154c2015-11-29 16:36:40 +01001146static int snd_pcm_action(const struct action_ops *ops,
Takashi Iwai877211f2005-11-17 13:59:38 +01001147 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 int state)
1149{
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001150 struct snd_pcm_group *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 int res;
1152
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001153 group = snd_pcm_stream_group_ref(substream);
1154 if (group)
Takashi Iwaiaa8edd82014-10-31 15:19:36 +01001155 res = snd_pcm_action_group(ops, substream, state, 1);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001156 else
1157 res = snd_pcm_action_single(ops, substream, state);
1158 snd_pcm_group_unref(group, substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 return res;
1160}
1161
1162/*
1163 * Note: don't use any locks before
1164 */
Julia Lawallb17154c2015-11-29 16:36:40 +01001165static int snd_pcm_action_lock_irq(const struct action_ops *ops,
Takashi Iwai877211f2005-11-17 13:59:38 +01001166 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 int state)
1168{
1169 int res;
1170
Takashi Iwaie3a4bd52014-10-31 14:45:04 +01001171 snd_pcm_stream_lock_irq(substream);
1172 res = snd_pcm_action(ops, substream, state);
1173 snd_pcm_stream_unlock_irq(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 return res;
1175}
1176
1177/*
1178 */
Julia Lawallb17154c2015-11-29 16:36:40 +01001179static int snd_pcm_action_nonatomic(const struct action_ops *ops,
Takashi Iwai877211f2005-11-17 13:59:38 +01001180 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 int state)
1182{
1183 int res;
1184
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001185 /* Guarantee the group members won't change during non-atomic action */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 down_read(&snd_pcm_link_rwsem);
1187 if (snd_pcm_stream_linked(substream))
1188 res = snd_pcm_action_group(ops, substream, state, 0);
1189 else
1190 res = snd_pcm_action_single(ops, substream, state);
1191 up_read(&snd_pcm_link_rwsem);
1192 return res;
1193}
1194
1195/*
1196 * start callbacks
1197 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001198static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199{
Takashi Iwai877211f2005-11-17 13:59:38 +01001200 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1202 return -EBADFD;
1203 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1204 !snd_pcm_playback_data(substream))
1205 return -EPIPE;
Pierre-Louis Bossart2b79d7a2015-02-06 15:55:51 -06001206 runtime->trigger_tstamp_latched = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 runtime->trigger_master = substream;
1208 return 0;
1209}
1210
Takashi Iwai877211f2005-11-17 13:59:38 +01001211static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212{
1213 if (substream->runtime->trigger_master != substream)
1214 return 0;
1215 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1216}
1217
Takashi Iwai877211f2005-11-17 13:59:38 +01001218static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219{
1220 if (substream->runtime->trigger_master == substream)
1221 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1222}
1223
Takashi Iwai877211f2005-11-17 13:59:38 +01001224static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225{
Takashi Iwai877211f2005-11-17 13:59:38 +01001226 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 snd_pcm_trigger_tstamp(substream);
Takashi Iwai6af3fb72009-05-27 10:49:26 +02001228 runtime->hw_ptr_jiffies = jiffies;
Jaroslav Kyselabd76af02010-08-18 14:16:54 +02001229 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1230 runtime->rate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 runtime->status->state = state;
1232 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1233 runtime->silence_size > 0)
1234 snd_pcm_playback_silence(substream, ULONG_MAX);
Jie Yang90bbaf62015-10-16 17:57:46 +08001235 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236}
1237
Julia Lawallb17154c2015-11-29 16:36:40 +01001238static const struct action_ops snd_pcm_action_start = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 .pre_action = snd_pcm_pre_start,
1240 .do_action = snd_pcm_do_start,
1241 .undo_action = snd_pcm_undo_start,
1242 .post_action = snd_pcm_post_start
1243};
1244
1245/**
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001246 * snd_pcm_start - start all linked streams
Takashi Iwaidf8db932005-09-07 13:38:19 +02001247 * @substream: the PCM substream instance
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001248 *
1249 * Return: Zero if successful, or a negative error code.
Takashi Iwaic2c86a92017-05-10 14:33:44 +02001250 * The stream lock must be acquired before calling this function.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001252int snd_pcm_start(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253{
Takashi Iwai877211f2005-11-17 13:59:38 +01001254 return snd_pcm_action(&snd_pcm_action_start, substream,
1255 SNDRV_PCM_STATE_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
Takashi Iwaic2c86a92017-05-10 14:33:44 +02001258/* take the stream lock and start the streams */
1259static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1260{
1261 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1262 SNDRV_PCM_STATE_RUNNING);
1263}
1264
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265/*
1266 * stop callbacks
1267 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001268static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269{
Takashi Iwai877211f2005-11-17 13:59:38 +01001270 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1272 return -EBADFD;
1273 runtime->trigger_master = substream;
1274 return 0;
1275}
1276
Takashi Iwai877211f2005-11-17 13:59:38 +01001277static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278{
1279 if (substream->runtime->trigger_master == substream &&
1280 snd_pcm_running(substream))
1281 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1282 return 0; /* unconditonally stop all substreams */
1283}
1284
Takashi Iwai877211f2005-11-17 13:59:38 +01001285static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286{
Takashi Iwai877211f2005-11-17 13:59:38 +01001287 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 if (runtime->status->state != state) {
1289 snd_pcm_trigger_tstamp(substream);
Takashi Iwai9bc889b2014-11-06 12:15:25 +01001290 runtime->status->state = state;
Jie Yang90bbaf62015-10-16 17:57:46 +08001291 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 }
1293 wake_up(&runtime->sleep);
Jaroslav Kyselac91a9882010-01-21 10:32:15 +01001294 wake_up(&runtime->tsleep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295}
1296
Julia Lawallb17154c2015-11-29 16:36:40 +01001297static const struct action_ops snd_pcm_action_stop = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 .pre_action = snd_pcm_pre_stop,
1299 .do_action = snd_pcm_do_stop,
1300 .post_action = snd_pcm_post_stop
1301};
1302
1303/**
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001304 * snd_pcm_stop - try to stop all running streams in the substream group
Takashi Iwaidf8db932005-09-07 13:38:19 +02001305 * @substream: the PCM substream instance
1306 * @state: PCM state after stopping the stream
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 *
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001308 * The state of each stream is then changed to the given state unconditionally.
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001309 *
Masanari Iida0a114582014-02-09 00:47:36 +09001310 * Return: Zero if successful, or a negative error code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 */
Clemens Ladischfea952e2011-02-14 11:00:47 +01001312int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313{
1314 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1315}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02001316EXPORT_SYMBOL(snd_pcm_stop);
1317
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318/**
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001319 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
Takashi Iwaidf8db932005-09-07 13:38:19 +02001320 * @substream: the PCM substream
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 *
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001322 * After stopping, the state is changed to SETUP.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 * Unlike snd_pcm_stop(), this affects only the given stream.
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001324 *
1325 * Return: Zero if succesful, or a negative error code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001327int snd_pcm_drain_done(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328{
Takashi Iwai877211f2005-11-17 13:59:38 +01001329 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1330 SNDRV_PCM_STATE_SETUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331}
1332
Takashi Iwai1fb85102014-11-07 17:08:28 +01001333/**
1334 * snd_pcm_stop_xrun - stop the running streams as XRUN
1335 * @substream: the PCM substream instance
Takashi Iwai1fb85102014-11-07 17:08:28 +01001336 *
1337 * This stops the given running substream (and all linked substreams) as XRUN.
1338 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1339 *
1340 * Return: Zero if successful, or a negative error code.
1341 */
1342int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1343{
1344 unsigned long flags;
Takashi Iwai1fb85102014-11-07 17:08:28 +01001345
1346 snd_pcm_stream_lock_irqsave(substream, flags);
Takashi Iwaie647f5a52018-07-04 15:08:05 +02001347 if (substream->runtime && snd_pcm_running(substream))
Takashi Iwai9cd641e2018-07-04 14:46:27 +02001348 __snd_pcm_xrun(substream);
Takashi Iwai1fb85102014-11-07 17:08:28 +01001349 snd_pcm_stream_unlock_irqrestore(substream, flags);
Takashi Iwai9cd641e2018-07-04 14:46:27 +02001350 return 0;
Takashi Iwai1fb85102014-11-07 17:08:28 +01001351}
1352EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1353
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354/*
1355 * pause callbacks
1356 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001357static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358{
Takashi Iwai877211f2005-11-17 13:59:38 +01001359 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1361 return -ENOSYS;
1362 if (push) {
1363 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1364 return -EBADFD;
1365 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1366 return -EBADFD;
1367 runtime->trigger_master = substream;
1368 return 0;
1369}
1370
Takashi Iwai877211f2005-11-17 13:59:38 +01001371static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372{
1373 if (substream->runtime->trigger_master != substream)
1374 return 0;
Jaroslav Kysela56385a12010-08-18 14:08:17 +02001375 /* some drivers might use hw_ptr to recover from the pause -
1376 update the hw_ptr now */
1377 if (push)
1378 snd_pcm_update_hw_ptr(substream);
Takashi Iwai6af3fb72009-05-27 10:49:26 +02001379 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
Uwe Kleine-Königb5950762010-11-01 15:38:34 -04001380 * a delta between the current jiffies, this gives a large enough
Takashi Iwai6af3fb72009-05-27 10:49:26 +02001381 * delta, effectively to skip the check once.
1382 */
1383 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 return substream->ops->trigger(substream,
1385 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1386 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1387}
1388
Takashi Iwai877211f2005-11-17 13:59:38 +01001389static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390{
1391 if (substream->runtime->trigger_master == substream)
1392 substream->ops->trigger(substream,
1393 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1394 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1395}
1396
Takashi Iwai877211f2005-11-17 13:59:38 +01001397static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398{
Takashi Iwai877211f2005-11-17 13:59:38 +01001399 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 snd_pcm_trigger_tstamp(substream);
1401 if (push) {
1402 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
Jie Yang90bbaf62015-10-16 17:57:46 +08001403 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 wake_up(&runtime->sleep);
Jaroslav Kyselac91a9882010-01-21 10:32:15 +01001405 wake_up(&runtime->tsleep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 } else {
1407 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
Jie Yang90bbaf62015-10-16 17:57:46 +08001408 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 }
1410}
1411
Julia Lawallb17154c2015-11-29 16:36:40 +01001412static const struct action_ops snd_pcm_action_pause = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 .pre_action = snd_pcm_pre_pause,
1414 .do_action = snd_pcm_do_pause,
1415 .undo_action = snd_pcm_undo_pause,
1416 .post_action = snd_pcm_post_pause
1417};
1418
1419/*
1420 * Push/release the pause for all linked streams.
1421 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001422static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423{
1424 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1425}
1426
1427#ifdef CONFIG_PM
1428/* suspend */
1429
Takashi Iwai877211f2005-11-17 13:59:38 +01001430static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431{
Takashi Iwai877211f2005-11-17 13:59:38 +01001432 struct snd_pcm_runtime *runtime = substream->runtime;
Takashi Iwai113ce082019-03-25 10:38:58 +01001433 switch (runtime->status->state) {
1434 case SNDRV_PCM_STATE_SUSPENDED:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 return -EBUSY;
Takashi Iwai113ce082019-03-25 10:38:58 +01001436 /* unresumable PCM state; return -EBUSY for skipping suspend */
1437 case SNDRV_PCM_STATE_OPEN:
1438 case SNDRV_PCM_STATE_SETUP:
1439 case SNDRV_PCM_STATE_DISCONNECTED:
1440 return -EBUSY;
1441 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 runtime->trigger_master = substream;
1443 return 0;
1444}
1445
Takashi Iwai877211f2005-11-17 13:59:38 +01001446static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447{
Takashi Iwai877211f2005-11-17 13:59:38 +01001448 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 if (runtime->trigger_master != substream)
1450 return 0;
1451 if (! snd_pcm_running(substream))
1452 return 0;
1453 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1454 return 0; /* suspend unconditionally */
1455}
1456
Takashi Iwai877211f2005-11-17 13:59:38 +01001457static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458{
Takashi Iwai877211f2005-11-17 13:59:38 +01001459 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 snd_pcm_trigger_tstamp(substream);
Takashi Iwai9bc889b2014-11-06 12:15:25 +01001461 runtime->status->suspended_state = runtime->status->state;
1462 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
Jie Yang90bbaf62015-10-16 17:57:46 +08001463 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 wake_up(&runtime->sleep);
Jaroslav Kyselac91a9882010-01-21 10:32:15 +01001465 wake_up(&runtime->tsleep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466}
1467
Julia Lawallb17154c2015-11-29 16:36:40 +01001468static const struct action_ops snd_pcm_action_suspend = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 .pre_action = snd_pcm_pre_suspend,
1470 .do_action = snd_pcm_do_suspend,
1471 .post_action = snd_pcm_post_suspend
1472};
1473
Takashi Iwaice7f93e2019-01-15 10:54:02 +01001474/*
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001475 * snd_pcm_suspend - trigger SUSPEND to all linked streams
Takashi Iwaidf8db932005-09-07 13:38:19 +02001476 * @substream: the PCM substream
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 * After this call, all streams are changed to SUSPENDED state.
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001479 *
Takashi Iwaice7f93e2019-01-15 10:54:02 +01001480 * Return: Zero if successful, or a negative error code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 */
Takashi Iwaice7f93e2019-01-15 10:54:02 +01001482static int snd_pcm_suspend(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483{
1484 int err;
1485 unsigned long flags;
1486
1487 snd_pcm_stream_lock_irqsave(substream, flags);
1488 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1489 snd_pcm_stream_unlock_irqrestore(substream, flags);
1490 return err;
1491}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02001492
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493/**
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001494 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
Takashi Iwaidf8db932005-09-07 13:38:19 +02001495 * @pcm: the PCM instance
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 * After this call, all streams are changed to SUSPENDED state.
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001498 *
1499 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001501int snd_pcm_suspend_all(struct snd_pcm *pcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502{
Takashi Iwai877211f2005-11-17 13:59:38 +01001503 struct snd_pcm_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 int stream, err = 0;
1505
Takashi Iwai603bf522005-11-17 15:59:14 +01001506 if (! pcm)
1507 return 0;
1508
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 for (stream = 0; stream < 2; stream++) {
Takashi Iwai877211f2005-11-17 13:59:38 +01001510 for (substream = pcm->streams[stream].substream;
1511 substream; substream = substream->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 /* FIXME: the open/close code should lock this as well */
1513 if (substream->runtime == NULL)
1514 continue;
Ranjani Sridharand9c0b2a2019-02-08 17:29:53 -06001515
1516 /*
1517 * Skip BE dai link PCM's that are internal and may
1518 * not have their substream ops set.
1519 */
1520 if (!substream->ops)
1521 continue;
1522
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 err = snd_pcm_suspend(substream);
1524 if (err < 0 && err != -EBUSY)
1525 return err;
1526 }
1527 }
1528 return 0;
1529}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02001530EXPORT_SYMBOL(snd_pcm_suspend_all);
1531
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532/* resume */
1533
Takashi Iwai877211f2005-11-17 13:59:38 +01001534static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535{
Takashi Iwai877211f2005-11-17 13:59:38 +01001536 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1538 return -ENOSYS;
1539 runtime->trigger_master = substream;
1540 return 0;
1541}
1542
Takashi Iwai877211f2005-11-17 13:59:38 +01001543static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544{
Takashi Iwai877211f2005-11-17 13:59:38 +01001545 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 if (runtime->trigger_master != substream)
1547 return 0;
1548 /* DMA not running previously? */
1549 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1550 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1551 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1552 return 0;
1553 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1554}
1555
Takashi Iwai877211f2005-11-17 13:59:38 +01001556static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557{
1558 if (substream->runtime->trigger_master == substream &&
1559 snd_pcm_running(substream))
1560 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1561}
1562
Takashi Iwai877211f2005-11-17 13:59:38 +01001563static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564{
Takashi Iwai877211f2005-11-17 13:59:38 +01001565 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 snd_pcm_trigger_tstamp(substream);
Takashi Iwai9bc889b2014-11-06 12:15:25 +01001567 runtime->status->state = runtime->status->suspended_state;
Jie Yang90bbaf62015-10-16 17:57:46 +08001568 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569}
1570
Julia Lawallb17154c2015-11-29 16:36:40 +01001571static const struct action_ops snd_pcm_action_resume = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 .pre_action = snd_pcm_pre_resume,
1573 .do_action = snd_pcm_do_resume,
1574 .undo_action = snd_pcm_undo_resume,
1575 .post_action = snd_pcm_post_resume
1576};
1577
Takashi Iwai877211f2005-11-17 13:59:38 +01001578static int snd_pcm_resume(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579{
Takashi Iwai68b4acd2016-05-24 15:07:39 +02001580 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581}
1582
1583#else
1584
Takashi Iwai877211f2005-11-17 13:59:38 +01001585static int snd_pcm_resume(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586{
1587 return -ENOSYS;
1588}
1589
1590#endif /* CONFIG_PM */
1591
1592/*
1593 * xrun ioctl
1594 *
1595 * Change the RUNNING stream(s) to XRUN state.
1596 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001597static int snd_pcm_xrun(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598{
Takashi Iwai877211f2005-11-17 13:59:38 +01001599 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 int result;
1601
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 snd_pcm_stream_lock_irq(substream);
1603 switch (runtime->status->state) {
1604 case SNDRV_PCM_STATE_XRUN:
1605 result = 0; /* already there */
1606 break;
1607 case SNDRV_PCM_STATE_RUNNING:
Takashi Iwai9cd641e2018-07-04 14:46:27 +02001608 __snd_pcm_xrun(substream);
1609 result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 break;
1611 default:
1612 result = -EBADFD;
1613 }
1614 snd_pcm_stream_unlock_irq(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 return result;
1616}
1617
1618/*
1619 * reset ioctl
1620 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001621static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622{
Takashi Iwai877211f2005-11-17 13:59:38 +01001623 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 switch (runtime->status->state) {
1625 case SNDRV_PCM_STATE_RUNNING:
1626 case SNDRV_PCM_STATE_PREPARED:
1627 case SNDRV_PCM_STATE_PAUSED:
1628 case SNDRV_PCM_STATE_SUSPENDED:
1629 return 0;
1630 default:
1631 return -EBADFD;
1632 }
1633}
1634
Takashi Iwai877211f2005-11-17 13:59:38 +01001635static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636{
Takashi Iwai877211f2005-11-17 13:59:38 +01001637 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1639 if (err < 0)
1640 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641 runtime->hw_ptr_base = 0;
Jaroslav Kyselae7636922010-01-26 17:08:24 +01001642 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1643 runtime->status->hw_ptr % runtime->period_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 runtime->silence_start = runtime->status->hw_ptr;
1645 runtime->silence_filled = 0;
1646 return 0;
1647}
1648
Takashi Iwai877211f2005-11-17 13:59:38 +01001649static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650{
Takashi Iwai877211f2005-11-17 13:59:38 +01001651 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 runtime->control->appl_ptr = runtime->status->hw_ptr;
1653 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1654 runtime->silence_size > 0)
1655 snd_pcm_playback_silence(substream, ULONG_MAX);
1656}
1657
Julia Lawallb17154c2015-11-29 16:36:40 +01001658static const struct action_ops snd_pcm_action_reset = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 .pre_action = snd_pcm_pre_reset,
1660 .do_action = snd_pcm_do_reset,
1661 .post_action = snd_pcm_post_reset
1662};
1663
Takashi Iwai877211f2005-11-17 13:59:38 +01001664static int snd_pcm_reset(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665{
1666 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1667}
1668
1669/*
1670 * prepare ioctl
1671 */
Takashi Iwai0df63e42006-04-28 15:13:41 +02001672/* we use the second argument for updating f_flags */
1673static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1674 int f_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675{
Takashi Iwai877211f2005-11-17 13:59:38 +01001676 struct snd_pcm_runtime *runtime = substream->runtime;
Takashi Iwaide1b8b92006-11-08 15:41:29 +01001677 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1678 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 return -EBADFD;
1680 if (snd_pcm_running(substream))
1681 return -EBUSY;
Takashi Iwai0df63e42006-04-28 15:13:41 +02001682 substream->f_flags = f_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 return 0;
1684}
1685
Takashi Iwai877211f2005-11-17 13:59:38 +01001686static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687{
1688 int err;
1689 err = substream->ops->prepare(substream);
1690 if (err < 0)
1691 return err;
1692 return snd_pcm_do_reset(substream, 0);
1693}
1694
Takashi Iwai877211f2005-11-17 13:59:38 +01001695static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696{
Takashi Iwai877211f2005-11-17 13:59:38 +01001697 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 runtime->control->appl_ptr = runtime->status->hw_ptr;
Takashi Iwai9b0573c2012-10-12 15:07:34 +02001699 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700}
1701
Julia Lawallb17154c2015-11-29 16:36:40 +01001702static const struct action_ops snd_pcm_action_prepare = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 .pre_action = snd_pcm_pre_prepare,
1704 .do_action = snd_pcm_do_prepare,
1705 .post_action = snd_pcm_post_prepare
1706};
1707
1708/**
Randy Dunlap1c85cc62008-10-15 14:38:40 -07001709 * snd_pcm_prepare - prepare the PCM substream to be triggerable
Takashi Iwaidf8db932005-09-07 13:38:19 +02001710 * @substream: the PCM substream instance
Takashi Iwai0df63e42006-04-28 15:13:41 +02001711 * @file: file to refer f_flags
Yacine Belkadieb7c06e2013-03-11 22:05:14 +01001712 *
1713 * Return: Zero if successful, or a negative error code.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 */
Takashi Iwai0df63e42006-04-28 15:13:41 +02001715static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1716 struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717{
Takashi Iwai0df63e42006-04-28 15:13:41 +02001718 int f_flags;
1719
1720 if (file)
1721 f_flags = file->f_flags;
1722 else
1723 f_flags = substream->f_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724
Takashi Iwai1b745cd2016-05-24 15:40:03 +02001725 snd_pcm_stream_lock_irq(substream);
1726 switch (substream->runtime->status->state) {
1727 case SNDRV_PCM_STATE_PAUSED:
1728 snd_pcm_pause(substream, 0);
1729 /* fallthru */
1730 case SNDRV_PCM_STATE_SUSPENDED:
1731 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1732 break;
1733 }
1734 snd_pcm_stream_unlock_irq(substream);
1735
Takashi Iwai68b4acd2016-05-24 15:07:39 +02001736 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1737 substream, f_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738}
1739
1740/*
1741 * drain ioctl
1742 */
1743
Takashi Iwai877211f2005-11-17 13:59:38 +01001744static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745{
Takashi Iwai4f7c39d2012-05-21 11:59:57 +02001746 struct snd_pcm_runtime *runtime = substream->runtime;
1747 switch (runtime->status->state) {
1748 case SNDRV_PCM_STATE_OPEN:
1749 case SNDRV_PCM_STATE_DISCONNECTED:
1750 case SNDRV_PCM_STATE_SUSPENDED:
1751 return -EBADFD;
1752 }
1753 runtime->trigger_master = substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 return 0;
1755}
1756
Takashi Iwai877211f2005-11-17 13:59:38 +01001757static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758{
Takashi Iwai877211f2005-11-17 13:59:38 +01001759 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1761 switch (runtime->status->state) {
1762 case SNDRV_PCM_STATE_PREPARED:
1763 /* start playback stream if possible */
1764 if (! snd_pcm_playback_empty(substream)) {
1765 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1766 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
Takashi Iwai70372a72014-12-18 10:02:41 +01001767 } else {
1768 runtime->status->state = SNDRV_PCM_STATE_SETUP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 }
1770 break;
1771 case SNDRV_PCM_STATE_RUNNING:
1772 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1773 break;
Takashi Iwai4f7c39d2012-05-21 11:59:57 +02001774 case SNDRV_PCM_STATE_XRUN:
1775 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1776 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 default:
1778 break;
1779 }
1780 } else {
1781 /* stop running stream */
1782 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
Marcin Ślusarzb05e5782007-12-14 12:50:16 +01001783 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
Marcin Ślusarzb05e5782007-12-14 12:50:16 +01001785 snd_pcm_do_stop(substream, new_state);
1786 snd_pcm_post_stop(substream, new_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 }
1788 }
Libin Yang48d88292014-12-31 22:09:54 +08001789
1790 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1791 runtime->trigger_master == substream &&
1792 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1793 return substream->ops->trigger(substream,
1794 SNDRV_PCM_TRIGGER_DRAIN);
1795
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 return 0;
1797}
1798
Takashi Iwai877211f2005-11-17 13:59:38 +01001799static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800{
1801}
1802
Julia Lawallb17154c2015-11-29 16:36:40 +01001803static const struct action_ops snd_pcm_action_drain_init = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 .pre_action = snd_pcm_pre_drain_init,
1805 .do_action = snd_pcm_do_drain_init,
1806 .post_action = snd_pcm_post_drain_init
1807};
1808
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809/*
1810 * Drain the stream(s).
1811 * When the substream is linked, sync until the draining of all playback streams
1812 * is finished.
1813 * After this call, all streams are supposed to be either SETUP or DRAINING
1814 * (capture only) state.
1815 */
Takashi Iwai4cdc1152009-08-20 16:40:16 +02001816static int snd_pcm_drain(struct snd_pcm_substream *substream,
1817 struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818{
Takashi Iwai877211f2005-11-17 13:59:38 +01001819 struct snd_card *card;
1820 struct snd_pcm_runtime *runtime;
Takashi Iwaief991b92007-02-22 12:52:53 +01001821 struct snd_pcm_substream *s;
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001822 struct snd_pcm_group *group;
Ingo Molnarac6424b2017-06-20 12:06:13 +02001823 wait_queue_entry_t wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824 int result = 0;
Takashi Iwai4cdc1152009-08-20 16:40:16 +02001825 int nonblock = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 card = substream->pcm->card;
1828 runtime = substream->runtime;
1829
1830 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1831 return -EBADFD;
1832
Takashi Iwai4cdc1152009-08-20 16:40:16 +02001833 if (file) {
1834 if (file->f_flags & O_NONBLOCK)
1835 nonblock = 1;
1836 } else if (substream->f_flags & O_NONBLOCK)
1837 nonblock = 1;
1838
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001839 snd_pcm_stream_lock_irq(substream);
1840 /* resume pause */
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001841 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001842 snd_pcm_pause(substream, 0);
1843
1844 /* pre-start/stop - all running streams are changed to DRAINING state */
1845 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
Takashi Iwai4cdc1152009-08-20 16:40:16 +02001846 if (result < 0)
1847 goto unlock;
1848 /* in non-blocking, we don't wait in ioctl but let caller poll */
1849 if (nonblock) {
1850 result = -EAGAIN;
1851 goto unlock;
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001852 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
1854 for (;;) {
1855 long tout;
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001856 struct snd_pcm_runtime *to_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 if (signal_pending(current)) {
1858 result = -ERESTARTSYS;
1859 break;
1860 }
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001861 /* find a substream to drain */
1862 to_check = NULL;
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001863 group = snd_pcm_stream_group_ref(substream);
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001864 snd_pcm_group_for_each_entry(s, substream) {
1865 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1866 continue;
1867 runtime = s->runtime;
1868 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1869 to_check = runtime;
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001870 break;
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001871 }
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001872 }
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001873 snd_pcm_group_unref(group, substream);
Takashi Iwaid3a7dcf2009-09-17 18:46:26 +02001874 if (!to_check)
1875 break; /* all drained */
1876 init_waitqueue_entry(&wait, current);
1877 add_wait_queue(&to_check->sleep, &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 snd_pcm_stream_unlock_irq(substream);
Takashi Iwaif2b36142011-05-26 08:09:38 +02001879 if (runtime->no_period_wakeup)
1880 tout = MAX_SCHEDULE_TIMEOUT;
1881 else {
1882 tout = 10;
1883 if (runtime->rate) {
1884 long t = runtime->period_size * 2 / runtime->rate;
1885 tout = max(t, tout);
1886 }
1887 tout = msecs_to_jiffies(tout * 1000);
1888 }
1889 tout = schedule_timeout_interruptible(tout);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001890
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 snd_pcm_stream_lock_irq(substream);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001892 group = snd_pcm_stream_group_ref(substream);
1893 snd_pcm_group_for_each_entry(s, substream) {
1894 if (s->runtime == to_check) {
1895 remove_wait_queue(&to_check->sleep, &wait);
1896 break;
1897 }
1898 }
1899 snd_pcm_group_unref(group, substream);
1900
Takashi Iwai0914f792012-10-16 16:43:39 +02001901 if (card->shutdown) {
1902 result = -ENODEV;
1903 break;
1904 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 if (tout == 0) {
1906 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1907 result = -ESTRPIPE;
1908 else {
Takashi Iwai09e56df2014-02-04 18:19:48 +01001909 dev_dbg(substream->pcm->card->dev,
1910 "playback drain error (DMA or IRQ trouble?)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1912 result = -EIO;
1913 }
1914 break;
1915 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 }
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001917
Takashi Iwai4cdc1152009-08-20 16:40:16 +02001918 unlock:
Takashi Iwai21cb2a22005-05-31 14:35:31 +02001919 snd_pcm_stream_unlock_irq(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920
1921 return result;
1922}
1923
1924/*
1925 * drop ioctl
1926 *
1927 * Immediately put all linked substreams into SETUP state.
1928 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001929static int snd_pcm_drop(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930{
Takashi Iwai877211f2005-11-17 13:59:38 +01001931 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 int result = 0;
1933
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001934 if (PCM_RUNTIME_CHECK(substream))
1935 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937
Takashi Iwaide1b8b92006-11-08 15:41:29 +01001938 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
Takashi Iwai4b95ff72016-05-24 15:08:31 +02001939 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 return -EBADFD;
1941
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 snd_pcm_stream_lock_irq(substream);
1943 /* resume pause */
1944 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1945 snd_pcm_pause(substream, 0);
1946
1947 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1948 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1949 snd_pcm_stream_unlock_irq(substream);
Takashi Iwai24e8fc42008-09-25 17:51:11 +02001950
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 return result;
1952}
1953
1954
Al Viro0888c322013-06-05 14:09:55 -04001955static bool is_pcm_file(struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956{
Al Viro0888c322013-06-05 14:09:55 -04001957 struct inode *inode = file_inode(file);
Takashi Iwaid819fb22019-01-13 09:25:42 +01001958 struct snd_pcm *pcm;
Clemens Ladischf87135f2005-11-20 14:06:59 +01001959 unsigned int minor;
1960
Al Viro0888c322013-06-05 14:09:55 -04001961 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1962 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 minor = iminor(inode);
Takashi Iwaid819fb22019-01-13 09:25:42 +01001964 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
1965 if (!pcm)
1966 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1967 if (!pcm)
1968 return false;
1969 snd_card_unref(pcm->card);
1970 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971}
1972
1973/*
1974 * PCM link handling
1975 */
Takashi Iwai877211f2005-11-17 13:59:38 +01001976static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977{
1978 int res = 0;
Takashi Iwai877211f2005-11-17 13:59:38 +01001979 struct snd_pcm_file *pcm_file;
1980 struct snd_pcm_substream *substream1;
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001981 struct snd_pcm_group *group, *target_group;
1982 bool nonatomic = substream->pcm->nonatomic;
Al Viro0888c322013-06-05 14:09:55 -04001983 struct fd f = fdget(fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984
Al Viro0888c322013-06-05 14:09:55 -04001985 if (!f.file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986 return -EBADFD;
Al Viro0888c322013-06-05 14:09:55 -04001987 if (!is_pcm_file(f.file)) {
1988 res = -EBADFD;
1989 goto _badf;
1990 }
1991 pcm_file = f.file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 substream1 = pcm_file->substream;
Takashi Iwai73365cb2019-01-13 09:35:17 +01001993 group = kzalloc(sizeof(*group), GFP_KERNEL);
Takashi Iwai16625912012-03-13 15:55:43 +01001994 if (!group) {
1995 res = -ENOMEM;
1996 goto _nolock;
1997 }
Takashi Iwai73365cb2019-01-13 09:35:17 +01001998 snd_pcm_group_init(group);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01001999
Takashi Iwaiecb41f02019-01-22 14:29:51 +01002000 down_write(&snd_pcm_link_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
Takashi Iwai257f8cc2014-08-29 15:32:29 +02002002 substream->runtime->status->state != substream1->runtime->status->state ||
2003 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004 res = -EBADFD;
2005 goto _end;
2006 }
2007 if (snd_pcm_stream_linked(substream1)) {
2008 res = -EALREADY;
2009 goto _end;
2010 }
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002011
2012 snd_pcm_stream_lock_irq(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 if (!snd_pcm_stream_linked(substream)) {
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002014 snd_pcm_group_assign(substream, group);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002015 group = NULL; /* assigned, don't free this one below */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016 }
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002017 target_group = substream->group;
2018 snd_pcm_stream_unlock_irq(substream);
2019
2020 snd_pcm_group_lock_irq(target_group, nonatomic);
2021 snd_pcm_stream_lock(substream1);
2022 snd_pcm_group_assign(substream1, target_group);
2023 snd_pcm_stream_unlock(substream1);
2024 snd_pcm_group_unlock_irq(target_group, nonatomic);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 _end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 up_write(&snd_pcm_link_rwsem);
Takashi Iwai16625912012-03-13 15:55:43 +01002027 _nolock:
Al Virodd6c5cd2013-06-05 14:07:08 -04002028 kfree(group);
Al Viro0888c322013-06-05 14:09:55 -04002029 _badf:
2030 fdput(f);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 return res;
2032}
2033
Takashi Iwai877211f2005-11-17 13:59:38 +01002034static void relink_to_local(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035{
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002036 snd_pcm_stream_lock(substream);
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002037 snd_pcm_group_assign(substream, &substream->self_group);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002038 snd_pcm_stream_unlock(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039}
2040
Takashi Iwai877211f2005-11-17 13:59:38 +01002041static int snd_pcm_unlink(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042{
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002043 struct snd_pcm_group *group;
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002044 bool nonatomic = substream->pcm->nonatomic;
2045 bool do_free = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 int res = 0;
2047
Takashi Iwaiecb41f02019-01-22 14:29:51 +01002048 down_write(&snd_pcm_link_rwsem);
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002049
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 if (!snd_pcm_stream_linked(substream)) {
2051 res = -EALREADY;
2052 goto _end;
2053 }
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002054
2055 group = substream->group;
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002056 snd_pcm_group_lock_irq(group, nonatomic);
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002057
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 relink_to_local(substream);
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002059
2060 /* detach the last stream, too */
2061 if (list_is_singular(&group->substreams)) {
Takashi Iwai7df5a5f2019-01-13 10:19:32 +01002062 relink_to_local(list_first_entry(&group->substreams,
2063 struct snd_pcm_substream,
2064 link_list));
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002065 do_free = !refcount_read(&group->refs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066 }
Takashi Iwaia41c4cb2019-01-13 09:40:21 +01002067
Takashi Iwaif57f3df2019-01-13 09:50:33 +01002068 snd_pcm_group_unlock_irq(group, nonatomic);
2069 if (do_free)
2070 kfree(group);
2071
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 _end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 up_write(&snd_pcm_link_rwsem);
2074 return res;
2075}
2076
2077/*
2078 * hw configurator
2079 */
Takashi Iwai877211f2005-11-17 13:59:38 +01002080static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2081 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082{
Takashi Iwai877211f2005-11-17 13:59:38 +01002083 struct snd_interval t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2085 hw_param_interval_c(params, rule->deps[1]), &t);
2086 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2087}
2088
Takashi Iwai877211f2005-11-17 13:59:38 +01002089static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2090 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091{
Takashi Iwai877211f2005-11-17 13:59:38 +01002092 struct snd_interval t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2094 hw_param_interval_c(params, rule->deps[1]), &t);
2095 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2096}
2097
Takashi Iwai877211f2005-11-17 13:59:38 +01002098static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2099 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100{
Takashi Iwai877211f2005-11-17 13:59:38 +01002101 struct snd_interval t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2103 hw_param_interval_c(params, rule->deps[1]),
2104 (unsigned long) rule->private, &t);
2105 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2106}
2107
Takashi Iwai877211f2005-11-17 13:59:38 +01002108static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2109 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110{
Takashi Iwai877211f2005-11-17 13:59:38 +01002111 struct snd_interval t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2113 (unsigned long) rule->private,
2114 hw_param_interval_c(params, rule->deps[1]), &t);
2115 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2116}
2117
Takashi Iwai877211f2005-11-17 13:59:38 +01002118static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2119 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120{
2121 unsigned int k;
Takashi Sakamotob55f9fd2017-05-17 08:48:20 +09002122 const struct snd_interval *i =
2123 hw_param_interval_c(params, rule->deps[0]);
Takashi Iwai877211f2005-11-17 13:59:38 +01002124 struct snd_mask m;
2125 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 snd_mask_any(&m);
2127 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2128 int bits;
2129 if (! snd_mask_test(mask, k))
2130 continue;
2131 bits = snd_pcm_format_physical_width(k);
2132 if (bits <= 0)
2133 continue; /* ignore invalid formats */
2134 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2135 snd_mask_reset(&m, k);
2136 }
2137 return snd_mask_refine(mask, &m);
2138}
2139
Takashi Iwai877211f2005-11-17 13:59:38 +01002140static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2141 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142{
Takashi Iwai877211f2005-11-17 13:59:38 +01002143 struct snd_interval t;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 unsigned int k;
2145 t.min = UINT_MAX;
2146 t.max = 0;
2147 t.openmin = 0;
2148 t.openmax = 0;
2149 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2150 int bits;
2151 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2152 continue;
2153 bits = snd_pcm_format_physical_width(k);
2154 if (bits <= 0)
2155 continue; /* ignore invalid formats */
2156 if (t.min > (unsigned)bits)
2157 t.min = bits;
2158 if (t.max < (unsigned)bits)
2159 t.max = bits;
2160 }
2161 t.integer = 1;
2162 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2163}
2164
2165#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2166#error "Change this table"
2167#endif
2168
Takashi Sakamoto8b674302017-05-17 08:48:17 +09002169static const unsigned int rates[] = {
2170 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2171 48000, 64000, 88200, 96000, 176400, 192000
2172};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173
Clemens Ladisch7653d552007-08-13 17:38:54 +02002174const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2175 .count = ARRAY_SIZE(rates),
2176 .list = rates,
2177};
2178
Takashi Iwai877211f2005-11-17 13:59:38 +01002179static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2180 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181{
Takashi Iwai877211f2005-11-17 13:59:38 +01002182 struct snd_pcm_hardware *hw = rule->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 return snd_interval_list(hw_param_interval(params, rule->var),
Clemens Ladisch7653d552007-08-13 17:38:54 +02002184 snd_pcm_known_rates.count,
2185 snd_pcm_known_rates.list, hw->rates);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186}
2187
Takashi Iwai877211f2005-11-17 13:59:38 +01002188static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2189 struct snd_pcm_hw_rule *rule)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190{
Takashi Iwai877211f2005-11-17 13:59:38 +01002191 struct snd_interval t;
2192 struct snd_pcm_substream *substream = rule->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 t.min = 0;
2194 t.max = substream->buffer_bytes_max;
2195 t.openmin = 0;
2196 t.openmax = 0;
2197 t.integer = 1;
2198 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2199}
2200
Takashi Iwai877211f2005-11-17 13:59:38 +01002201int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202{
Takashi Iwai877211f2005-11-17 13:59:38 +01002203 struct snd_pcm_runtime *runtime = substream->runtime;
2204 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 int k, err;
2206
2207 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2208 snd_mask_any(constrs_mask(constrs, k));
2209 }
2210
2211 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2212 snd_interval_any(constrs_interval(constrs, k));
2213 }
2214
2215 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2216 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2217 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2218 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2219 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2220
2221 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2222 snd_pcm_hw_rule_format, NULL,
2223 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2224 if (err < 0)
2225 return err;
2226 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2227 snd_pcm_hw_rule_sample_bits, NULL,
2228 SNDRV_PCM_HW_PARAM_FORMAT,
2229 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2230 if (err < 0)
2231 return err;
2232 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2233 snd_pcm_hw_rule_div, NULL,
2234 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2235 if (err < 0)
2236 return err;
2237 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2238 snd_pcm_hw_rule_mul, NULL,
2239 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2240 if (err < 0)
2241 return err;
2242 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2243 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2244 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2245 if (err < 0)
2246 return err;
2247 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2248 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2249 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2250 if (err < 0)
2251 return err;
2252 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2253 snd_pcm_hw_rule_div, NULL,
2254 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2255 if (err < 0)
2256 return err;
2257 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2258 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2259 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2260 if (err < 0)
2261 return err;
2262 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2263 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2264 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2265 if (err < 0)
2266 return err;
2267 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2268 snd_pcm_hw_rule_div, NULL,
2269 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2270 if (err < 0)
2271 return err;
2272 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2273 snd_pcm_hw_rule_div, NULL,
2274 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2275 if (err < 0)
2276 return err;
2277 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2278 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2279 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2280 if (err < 0)
2281 return err;
2282 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2283 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2284 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2285 if (err < 0)
2286 return err;
2287 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2288 snd_pcm_hw_rule_mul, NULL,
2289 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2290 if (err < 0)
2291 return err;
2292 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2293 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2294 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2295 if (err < 0)
2296 return err;
2297 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2298 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2299 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2300 if (err < 0)
2301 return err;
2302 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2303 snd_pcm_hw_rule_muldivk, (void*) 8,
2304 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2305 if (err < 0)
2306 return err;
2307 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2308 snd_pcm_hw_rule_muldivk, (void*) 8,
2309 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2310 if (err < 0)
2311 return err;
2312 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2313 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2314 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2315 if (err < 0)
2316 return err;
2317 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2318 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2319 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2320 if (err < 0)
2321 return err;
2322 return 0;
2323}
2324
Takashi Iwai877211f2005-11-17 13:59:38 +01002325int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326{
Takashi Iwai877211f2005-11-17 13:59:38 +01002327 struct snd_pcm_runtime *runtime = substream->runtime;
2328 struct snd_pcm_hardware *hw = &runtime->hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 int err;
2330 unsigned int mask = 0;
2331
2332 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2333 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2334 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2335 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
Takashi Iwai63825f32014-10-22 12:04:46 +02002336 if (hw_support_mmap(substream)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2338 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2339 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2340 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2341 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2342 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2343 }
2344 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002345 if (err < 0)
2346 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347
2348 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002349 if (err < 0)
2350 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351
2352 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002353 if (err < 0)
2354 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355
2356 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2357 hw->channels_min, hw->channels_max);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002358 if (err < 0)
2359 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
2361 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2362 hw->rate_min, hw->rate_max);
Guennadi Liakhovetski8b90ca02009-12-24 01:17:46 +01002363 if (err < 0)
2364 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365
2366 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2367 hw->period_bytes_min, hw->period_bytes_max);
Guennadi Liakhovetski8b90ca02009-12-24 01:17:46 +01002368 if (err < 0)
2369 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370
2371 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2372 hw->periods_min, hw->periods_max);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002373 if (err < 0)
2374 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375
2376 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2377 hw->period_bytes_min, hw->buffer_bytes_max);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002378 if (err < 0)
2379 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380
2381 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2382 snd_pcm_hw_rule_buffer_bytes_max, substream,
2383 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2384 if (err < 0)
2385 return err;
2386
2387 /* FIXME: remove */
2388 if (runtime->dma_bytes) {
2389 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002390 if (err < 0)
Sachin Kamat6cf95152012-11-21 14:36:55 +05302391 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 }
2393
2394 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2395 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2396 snd_pcm_hw_rule_rate, hw,
2397 SNDRV_PCM_HW_PARAM_RATE, -1);
2398 if (err < 0)
2399 return err;
2400 }
2401
2402 /* FIXME: this belong to lowlevel */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2404
2405 return 0;
2406}
2407
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002408static void pcm_release_private(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409{
Takashi Iwaib51abed2018-11-29 08:02:49 +01002410 if (snd_pcm_stream_linked(substream))
2411 snd_pcm_unlink(substream);
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002412}
2413
2414void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2415{
Takashi Iwai0df63e42006-04-28 15:13:41 +02002416 substream->ref_count--;
2417 if (substream->ref_count > 0)
2418 return;
2419
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002420 snd_pcm_drop(substream);
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002421 if (substream->hw_opened) {
Takashi Iwai094435d2015-09-29 12:57:42 +02002422 if (substream->ops->hw_free &&
2423 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424 substream->ops->hw_free(substream);
2425 substream->ops->close(substream);
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002426 substream->hw_opened = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 }
Takashi Iwai8699a0b2010-09-16 22:52:32 +02002428 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2429 pm_qos_remove_request(&substream->latency_pm_qos_req);
Takashi Iwai15762742006-04-06 19:47:42 +02002430 if (substream->pcm_release) {
2431 substream->pcm_release(substream);
2432 substream->pcm_release = NULL;
2433 }
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002434 snd_pcm_detach_substream(substream);
2435}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02002436EXPORT_SYMBOL(snd_pcm_release_substream);
2437
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002438int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2439 struct file *file,
2440 struct snd_pcm_substream **rsubstream)
2441{
2442 struct snd_pcm_substream *substream;
2443 int err;
2444
2445 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2446 if (err < 0)
2447 return err;
Takashi Iwai0df63e42006-04-28 15:13:41 +02002448 if (substream->ref_count > 1) {
2449 *rsubstream = substream;
2450 return 0;
2451 }
2452
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002453 err = snd_pcm_hw_constraints_init(substream);
2454 if (err < 0) {
Takashi Iwai09e56df2014-02-04 18:19:48 +01002455 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002456 goto error;
2457 }
2458
2459 if ((err = substream->ops->open(substream)) < 0)
2460 goto error;
2461
2462 substream->hw_opened = 1;
2463
2464 err = snd_pcm_hw_constraints_complete(substream);
2465 if (err < 0) {
Takashi Iwai09e56df2014-02-04 18:19:48 +01002466 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002467 goto error;
2468 }
2469
2470 *rsubstream = substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471 return 0;
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002472
2473 error:
2474 snd_pcm_release_substream(substream);
2475 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002476}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02002477EXPORT_SYMBOL(snd_pcm_open_substream);
2478
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479static int snd_pcm_open_file(struct file *file,
Takashi Iwai877211f2005-11-17 13:59:38 +01002480 struct snd_pcm *pcm,
Feng Tangffd3d5c2011-10-10 10:31:48 +08002481 int stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482{
Takashi Iwai877211f2005-11-17 13:59:38 +01002483 struct snd_pcm_file *pcm_file;
2484 struct snd_pcm_substream *substream;
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002485 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002487 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2488 if (err < 0)
2489 return err;
2490
Takashi Iwai548a6482006-07-31 16:51:51 +02002491 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2492 if (pcm_file == NULL) {
2493 snd_pcm_release_substream(substream);
2494 return -ENOMEM;
2495 }
2496 pcm_file->substream = substream;
Takashi Iwaide897502019-01-23 12:47:34 +01002497 if (substream->ref_count == 1)
Takashi Iwai0df63e42006-04-28 15:13:41 +02002498 substream->pcm_release = pcm_release_private;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 file->private_data = pcm_file;
Feng Tangffd3d5c2011-10-10 10:31:48 +08002500
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 return 0;
2502}
2503
Clemens Ladischf87135f2005-11-20 14:06:59 +01002504static int snd_pcm_playback_open(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505{
Takashi Iwai877211f2005-11-17 13:59:38 +01002506 struct snd_pcm *pcm;
Takashi Iwai02f48652010-04-13 11:49:04 +02002507 int err = nonseekable_open(inode, file);
2508 if (err < 0)
2509 return err;
Clemens Ladischf87135f2005-11-20 14:06:59 +01002510 pcm = snd_lookup_minor_data(iminor(inode),
2511 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
Takashi Iwaia0830db2012-10-16 13:05:59 +02002512 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
Takashi Iwai8bb4d9c2012-11-08 14:36:18 +01002513 if (pcm)
2514 snd_card_unref(pcm->card);
Takashi Iwaia0830db2012-10-16 13:05:59 +02002515 return err;
Clemens Ladischf87135f2005-11-20 14:06:59 +01002516}
2517
2518static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2519{
2520 struct snd_pcm *pcm;
Takashi Iwai02f48652010-04-13 11:49:04 +02002521 int err = nonseekable_open(inode, file);
2522 if (err < 0)
2523 return err;
Clemens Ladischf87135f2005-11-20 14:06:59 +01002524 pcm = snd_lookup_minor_data(iminor(inode),
2525 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
Takashi Iwaia0830db2012-10-16 13:05:59 +02002526 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
Takashi Iwai8bb4d9c2012-11-08 14:36:18 +01002527 if (pcm)
2528 snd_card_unref(pcm->card);
Takashi Iwaia0830db2012-10-16 13:05:59 +02002529 return err;
Clemens Ladischf87135f2005-11-20 14:06:59 +01002530}
2531
2532static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2533{
2534 int err;
Ingo Molnarac6424b2017-06-20 12:06:13 +02002535 wait_queue_entry_t wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 if (pcm == NULL) {
2538 err = -ENODEV;
2539 goto __error1;
2540 }
2541 err = snd_card_file_add(pcm->card, file);
2542 if (err < 0)
2543 goto __error1;
2544 if (!try_module_get(pcm->card->module)) {
2545 err = -EFAULT;
2546 goto __error2;
2547 }
2548 init_waitqueue_entry(&wait, current);
2549 add_wait_queue(&pcm->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002550 mutex_lock(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551 while (1) {
Feng Tangffd3d5c2011-10-10 10:31:48 +08002552 err = snd_pcm_open_file(file, pcm, stream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553 if (err >= 0)
2554 break;
2555 if (err == -EAGAIN) {
2556 if (file->f_flags & O_NONBLOCK) {
2557 err = -EBUSY;
2558 break;
2559 }
2560 } else
2561 break;
2562 set_current_state(TASK_INTERRUPTIBLE);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002563 mutex_unlock(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002565 mutex_lock(&pcm->open_mutex);
Takashi Iwai0914f792012-10-16 16:43:39 +02002566 if (pcm->card->shutdown) {
2567 err = -ENODEV;
2568 break;
2569 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570 if (signal_pending(current)) {
2571 err = -ERESTARTSYS;
2572 break;
2573 }
2574 }
2575 remove_wait_queue(&pcm->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002576 mutex_unlock(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577 if (err < 0)
2578 goto __error;
2579 return err;
2580
2581 __error:
2582 module_put(pcm->card->module);
2583 __error2:
2584 snd_card_file_remove(pcm->card, file);
2585 __error1:
2586 return err;
2587}
2588
2589static int snd_pcm_release(struct inode *inode, struct file *file)
2590{
Takashi Iwai877211f2005-11-17 13:59:38 +01002591 struct snd_pcm *pcm;
2592 struct snd_pcm_substream *substream;
2593 struct snd_pcm_file *pcm_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594
2595 pcm_file = file->private_data;
2596 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02002597 if (snd_BUG_ON(!substream))
2598 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 pcm = substream->pcm;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002600 mutex_lock(&pcm->open_mutex);
Takashi Iwai3bf75f92006-03-27 16:40:49 +02002601 snd_pcm_release_substream(substream);
Takashi Iwai548a6482006-07-31 16:51:51 +02002602 kfree(pcm_file);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01002603 mutex_unlock(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002604 wake_up(&pcm->open_wait);
2605 module_put(pcm->card->module);
2606 snd_card_file_remove(pcm->card, file);
2607 return 0;
2608}
2609
Takashi Iwaif839cc12017-05-19 20:04:23 +02002610/* check and update PCM state; return 0 or a negative error
2611 * call this inside PCM lock
2612 */
2613static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2614{
2615 switch (substream->runtime->status->state) {
2616 case SNDRV_PCM_STATE_DRAINING:
2617 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2618 return -EBADFD;
2619 /* Fall through */
2620 case SNDRV_PCM_STATE_RUNNING:
2621 return snd_pcm_update_hw_ptr(substream);
2622 case SNDRV_PCM_STATE_PREPARED:
2623 case SNDRV_PCM_STATE_PAUSED:
2624 return 0;
2625 case SNDRV_PCM_STATE_SUSPENDED:
2626 return -ESTRPIPE;
2627 case SNDRV_PCM_STATE_XRUN:
2628 return -EPIPE;
2629 default:
2630 return -EBADFD;
2631 }
2632}
2633
Takashi Iwai9027c462017-05-19 20:22:33 +02002634/* increase the appl_ptr; returns the processed frames or a negative error */
Takashi Iwaie0327a02017-05-19 20:16:44 +02002635static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2636 snd_pcm_uframes_t frames,
2637 snd_pcm_sframes_t avail)
2638{
2639 struct snd_pcm_runtime *runtime = substream->runtime;
2640 snd_pcm_sframes_t appl_ptr;
Takashi Iwai9027c462017-05-19 20:22:33 +02002641 int ret;
Takashi Iwaie0327a02017-05-19 20:16:44 +02002642
2643 if (avail <= 0)
2644 return 0;
2645 if (frames > (snd_pcm_uframes_t)avail)
2646 frames = avail;
2647 appl_ptr = runtime->control->appl_ptr + frames;
2648 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2649 appl_ptr -= runtime->boundary;
Takashi Sakamoto66e01a52017-06-12 09:41:44 +09002650 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
Takashi Iwai9027c462017-05-19 20:22:33 +02002651 return ret < 0 ? ret : frames;
Takashi Iwaie0327a02017-05-19 20:16:44 +02002652}
2653
Takashi Iwaifb51f1c2018-01-03 15:16:30 +01002654/* decrease the appl_ptr; returns the processed frames or zero for error */
Takashi Iwaie0327a02017-05-19 20:16:44 +02002655static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2656 snd_pcm_uframes_t frames,
2657 snd_pcm_sframes_t avail)
2658{
2659 struct snd_pcm_runtime *runtime = substream->runtime;
2660 snd_pcm_sframes_t appl_ptr;
Takashi Iwai9027c462017-05-19 20:22:33 +02002661 int ret;
Takashi Iwaie0327a02017-05-19 20:16:44 +02002662
2663 if (avail <= 0)
2664 return 0;
2665 if (frames > (snd_pcm_uframes_t)avail)
2666 frames = avail;
2667 appl_ptr = runtime->control->appl_ptr - frames;
2668 if (appl_ptr < 0)
2669 appl_ptr += runtime->boundary;
Takashi Sakamoto66e01a52017-06-12 09:41:44 +09002670 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
Takashi Iwaifb51f1c2018-01-03 15:16:30 +01002671 /* NOTE: we return zero for errors because PulseAudio gets depressed
2672 * upon receiving an error from rewind ioctl and stops processing
2673 * any longer. Returning zero means that no rewind is done, so
2674 * it's not absolutely wrong to answer like that.
2675 */
2676 return ret < 0 ? 0 : frames;
Takashi Iwaie0327a02017-05-19 20:16:44 +02002677}
2678
Takashi Iwai763e5062018-04-11 17:56:52 +02002679static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2680 snd_pcm_uframes_t frames)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682 snd_pcm_sframes_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683
2684 if (frames == 0)
2685 return 0;
2686
2687 snd_pcm_stream_lock_irq(substream);
Takashi Iwaif839cc12017-05-19 20:04:23 +02002688 ret = do_pcm_hwsync(substream);
Takashi Iwaie0327a02017-05-19 20:16:44 +02002689 if (!ret)
2690 ret = rewind_appl_ptr(substream, frames,
Takashi Iwai763e5062018-04-11 17:56:52 +02002691 snd_pcm_hw_avail(substream));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692 snd_pcm_stream_unlock_irq(substream);
2693 return ret;
2694}
2695
Takashi Iwai763e5062018-04-11 17:56:52 +02002696static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2697 snd_pcm_uframes_t frames)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 snd_pcm_sframes_t ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002700
2701 if (frames == 0)
2702 return 0;
2703
2704 snd_pcm_stream_lock_irq(substream);
Takashi Iwaif839cc12017-05-19 20:04:23 +02002705 ret = do_pcm_hwsync(substream);
Takashi Iwaie0327a02017-05-19 20:16:44 +02002706 if (!ret)
2707 ret = forward_appl_ptr(substream, frames,
Takashi Iwai763e5062018-04-11 17:56:52 +02002708 snd_pcm_avail(substream));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 snd_pcm_stream_unlock_irq(substream);
2710 return ret;
2711}
2712
Takashi Iwai877211f2005-11-17 13:59:38 +01002713static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002714{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 int err;
2716
2717 snd_pcm_stream_lock_irq(substream);
Takashi Iwaif839cc12017-05-19 20:04:23 +02002718 err = do_pcm_hwsync(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719 snd_pcm_stream_unlock_irq(substream);
2720 return err;
2721}
2722
Jeffery Miller912e4c32018-04-20 23:20:46 -05002723static int snd_pcm_delay(struct snd_pcm_substream *substream,
2724 snd_pcm_sframes_t *delay)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 int err;
2727 snd_pcm_sframes_t n = 0;
2728
2729 snd_pcm_stream_lock_irq(substream);
Takashi Iwaif839cc12017-05-19 20:04:23 +02002730 err = do_pcm_hwsync(substream);
Takashi Iwaic99c5a32018-04-11 18:07:27 +02002731 if (!err)
2732 n = snd_pcm_calc_delay(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733 snd_pcm_stream_unlock_irq(substream);
Jeffery Miller912e4c32018-04-20 23:20:46 -05002734 if (!err)
2735 *delay = n;
2736 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737}
2738
Takashi Iwai877211f2005-11-17 13:59:38 +01002739static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2740 struct snd_pcm_sync_ptr __user *_sync_ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741{
Takashi Iwai877211f2005-11-17 13:59:38 +01002742 struct snd_pcm_runtime *runtime = substream->runtime;
2743 struct snd_pcm_sync_ptr sync_ptr;
2744 volatile struct snd_pcm_mmap_status *status;
2745 volatile struct snd_pcm_mmap_control *control;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 int err;
2747
2748 memset(&sync_ptr, 0, sizeof(sync_ptr));
2749 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2750 return -EFAULT;
Takashi Iwai877211f2005-11-17 13:59:38 +01002751 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 return -EFAULT;
2753 status = runtime->status;
2754 control = runtime->control;
2755 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2756 err = snd_pcm_hwsync(substream);
2757 if (err < 0)
2758 return err;
2759 }
2760 snd_pcm_stream_lock_irq(substream);
Takashi Iwai9027c462017-05-19 20:22:33 +02002761 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
Takashi Sakamoto66e01a52017-06-12 09:41:44 +09002762 err = pcm_lib_apply_appl_ptr(substream,
2763 sync_ptr.c.control.appl_ptr);
Takashi Iwai9027c462017-05-19 20:22:33 +02002764 if (err < 0) {
2765 snd_pcm_stream_unlock_irq(substream);
2766 return err;
2767 }
2768 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769 sync_ptr.c.control.appl_ptr = control->appl_ptr;
Takashi Iwai9027c462017-05-19 20:22:33 +02002770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2772 control->avail_min = sync_ptr.c.control.avail_min;
2773 else
2774 sync_ptr.c.control.avail_min = control->avail_min;
2775 sync_ptr.s.status.state = status->state;
2776 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2777 sync_ptr.s.status.tstamp = status->tstamp;
2778 sync_ptr.s.status.suspended_state = status->suspended_state;
David Henningssonf853dca2018-04-21 14:57:40 +02002779 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 snd_pcm_stream_unlock_irq(substream);
2781 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2782 return -EFAULT;
2783 return 0;
2784}
Jaroslav Kyselab751eef2007-12-13 10:19:42 +01002785
2786static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2787{
2788 struct snd_pcm_runtime *runtime = substream->runtime;
2789 int arg;
2790
2791 if (get_user(arg, _arg))
2792 return -EFAULT;
2793 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2794 return -EINVAL;
Takashi Iwai2408c212014-07-10 09:40:38 +02002795 runtime->tstamp_type = arg;
Jaroslav Kyselab751eef2007-12-13 10:19:42 +01002796 return 0;
2797}
Takashi Iwai67616fe2017-08-30 15:39:32 +02002798
2799static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
2800 struct snd_xferi __user *_xferi)
2801{
2802 struct snd_xferi xferi;
2803 struct snd_pcm_runtime *runtime = substream->runtime;
2804 snd_pcm_sframes_t result;
2805
2806 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2807 return -EBADFD;
2808 if (put_user(0, &_xferi->result))
2809 return -EFAULT;
2810 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2811 return -EFAULT;
2812 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2813 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2814 else
2815 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2816 __put_user(result, &_xferi->result);
2817 return result < 0 ? result : 0;
2818}
2819
2820static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
2821 struct snd_xfern __user *_xfern)
2822{
2823 struct snd_xfern xfern;
2824 struct snd_pcm_runtime *runtime = substream->runtime;
2825 void *bufs;
2826 snd_pcm_sframes_t result;
2827
2828 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2829 return -EBADFD;
2830 if (runtime->channels > 128)
2831 return -EINVAL;
2832 if (put_user(0, &_xfern->result))
2833 return -EFAULT;
2834 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2835 return -EFAULT;
2836
2837 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
2838 if (IS_ERR(bufs))
2839 return PTR_ERR(bufs);
2840 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2841 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2842 else
2843 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2844 kfree(bufs);
2845 __put_user(result, &_xfern->result);
2846 return result < 0 ? result : 0;
2847}
2848
2849static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
2850 snd_pcm_uframes_t __user *_frames)
2851{
2852 snd_pcm_uframes_t frames;
2853 snd_pcm_sframes_t result;
2854
2855 if (get_user(frames, _frames))
2856 return -EFAULT;
2857 if (put_user(0, _frames))
2858 return -EFAULT;
Takashi Iwai763e5062018-04-11 17:56:52 +02002859 result = snd_pcm_rewind(substream, frames);
Takashi Iwai67616fe2017-08-30 15:39:32 +02002860 __put_user(result, _frames);
2861 return result < 0 ? result : 0;
2862}
2863
2864static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
2865 snd_pcm_uframes_t __user *_frames)
2866{
2867 snd_pcm_uframes_t frames;
2868 snd_pcm_sframes_t result;
2869
2870 if (get_user(frames, _frames))
2871 return -EFAULT;
2872 if (put_user(0, _frames))
2873 return -EFAULT;
Takashi Iwai763e5062018-04-11 17:56:52 +02002874 result = snd_pcm_forward(substream, frames);
Takashi Iwai67616fe2017-08-30 15:39:32 +02002875 __put_user(result, _frames);
2876 return result < 0 ? result : 0;
2877}
2878
2879static int snd_pcm_common_ioctl(struct file *file,
Takashi Iwai0df63e42006-04-28 15:13:41 +02002880 struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881 unsigned int cmd, void __user *arg)
2882{
Takashi Iwai4b671f52017-06-19 23:11:54 +02002883 struct snd_pcm_file *pcm_file = file->private_data;
Takashi Iwai7d8e8292017-08-30 16:13:25 +02002884 int res;
2885
Takashi Iwai67616fe2017-08-30 15:39:32 +02002886 if (PCM_RUNTIME_CHECK(substream))
2887 return -ENXIO;
2888
Takashi Iwai7d8e8292017-08-30 16:13:25 +02002889 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
2890 if (res < 0)
2891 return res;
Takashi Iwai4b671f52017-06-19 23:11:54 +02002892
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893 switch (cmd) {
2894 case SNDRV_PCM_IOCTL_PVERSION:
2895 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2896 case SNDRV_PCM_IOCTL_INFO:
2897 return snd_pcm_info_user(substream, arg);
Jaroslav Kysela28e9e472007-12-17 09:02:22 +01002898 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2899 return 0;
Jaroslav Kyselab751eef2007-12-13 10:19:42 +01002900 case SNDRV_PCM_IOCTL_TTSTAMP:
2901 return snd_pcm_tstamp(substream, arg);
Takashi Iwai4b671f52017-06-19 23:11:54 +02002902 case SNDRV_PCM_IOCTL_USER_PVERSION:
2903 if (get_user(pcm_file->user_pversion,
2904 (unsigned int __user *)arg))
2905 return -EFAULT;
2906 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907 case SNDRV_PCM_IOCTL_HW_REFINE:
2908 return snd_pcm_hw_refine_user(substream, arg);
2909 case SNDRV_PCM_IOCTL_HW_PARAMS:
2910 return snd_pcm_hw_params_user(substream, arg);
2911 case SNDRV_PCM_IOCTL_HW_FREE:
2912 return snd_pcm_hw_free(substream);
2913 case SNDRV_PCM_IOCTL_SW_PARAMS:
2914 return snd_pcm_sw_params_user(substream, arg);
2915 case SNDRV_PCM_IOCTL_STATUS:
Pierre-Louis Bossart38ca2a42015-02-13 15:14:04 -06002916 return snd_pcm_status_user(substream, arg, false);
2917 case SNDRV_PCM_IOCTL_STATUS_EXT:
2918 return snd_pcm_status_user(substream, arg, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2920 return snd_pcm_channel_info_user(substream, arg);
2921 case SNDRV_PCM_IOCTL_PREPARE:
Takashi Iwai0df63e42006-04-28 15:13:41 +02002922 return snd_pcm_prepare(substream, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002923 case SNDRV_PCM_IOCTL_RESET:
2924 return snd_pcm_reset(substream);
2925 case SNDRV_PCM_IOCTL_START:
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002926 return snd_pcm_start_lock_irq(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927 case SNDRV_PCM_IOCTL_LINK:
2928 return snd_pcm_link(substream, (int)(unsigned long) arg);
2929 case SNDRV_PCM_IOCTL_UNLINK:
2930 return snd_pcm_unlink(substream);
2931 case SNDRV_PCM_IOCTL_RESUME:
2932 return snd_pcm_resume(substream);
2933 case SNDRV_PCM_IOCTL_XRUN:
2934 return snd_pcm_xrun(substream);
2935 case SNDRV_PCM_IOCTL_HWSYNC:
2936 return snd_pcm_hwsync(substream);
2937 case SNDRV_PCM_IOCTL_DELAY:
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002938 {
Jeffery Miller912e4c32018-04-20 23:20:46 -05002939 snd_pcm_sframes_t delay;
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002940 snd_pcm_sframes_t __user *res = arg;
Jeffery Miller912e4c32018-04-20 23:20:46 -05002941 int err;
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002942
Jeffery Miller912e4c32018-04-20 23:20:46 -05002943 err = snd_pcm_delay(substream, &delay);
2944 if (err)
2945 return err;
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002946 if (put_user(delay, res))
2947 return -EFAULT;
2948 return 0;
2949 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 case SNDRV_PCM_IOCTL_SYNC_PTR:
2951 return snd_pcm_sync_ptr(substream, arg);
Takashi Iwai59d48582005-12-01 10:51:58 +01002952#ifdef CONFIG_SND_SUPPORT_OLD_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2954 return snd_pcm_hw_refine_old_user(substream, arg);
2955 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2956 return snd_pcm_hw_params_old_user(substream, arg);
Takashi Iwai59d48582005-12-01 10:51:58 +01002957#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002958 case SNDRV_PCM_IOCTL_DRAIN:
Takashi Iwai4cdc1152009-08-20 16:40:16 +02002959 return snd_pcm_drain(substream, file);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960 case SNDRV_PCM_IOCTL_DROP:
2961 return snd_pcm_drop(substream);
Takashi Iwaie661d0d2006-02-21 14:14:50 +01002962 case SNDRV_PCM_IOCTL_PAUSE:
Takashi Iwai34bcc442016-05-24 14:58:04 +02002963 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2964 substream,
2965 (int)(unsigned long)arg);
Takashi Iwai67616fe2017-08-30 15:39:32 +02002966 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2967 case SNDRV_PCM_IOCTL_READI_FRAMES:
2968 return snd_pcm_xferi_frames_ioctl(substream, arg);
2969 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2970 case SNDRV_PCM_IOCTL_READN_FRAMES:
2971 return snd_pcm_xfern_frames_ioctl(substream, arg);
2972 case SNDRV_PCM_IOCTL_REWIND:
2973 return snd_pcm_rewind_ioctl(substream, arg);
2974 case SNDRV_PCM_IOCTL_FORWARD:
2975 return snd_pcm_forward_ioctl(substream, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002976 }
Takashi Iwai09e56df2014-02-04 18:19:48 +01002977 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978 return -ENOTTY;
2979}
2980
Takashi Iwai67616fe2017-08-30 15:39:32 +02002981static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
2982 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983{
Takashi Iwai877211f2005-11-17 13:59:38 +01002984 struct snd_pcm_file *pcm_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002985
2986 pcm_file = file->private_data;
2987
2988 if (((cmd >> 8) & 0xff) != 'A')
2989 return -ENOTTY;
2990
Takashi Iwai67616fe2017-08-30 15:39:32 +02002991 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
2992 (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993}
2994
Takashi Iwaic2c86a92017-05-10 14:33:44 +02002995/**
2996 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
2997 * @substream: PCM substream
2998 * @cmd: IOCTL cmd
2999 * @arg: IOCTL argument
3000 *
3001 * The function is provided primarily for OSS layer and USB gadget drivers,
3002 * and it allows only the limited set of ioctls (hw_params, sw_params,
3003 * prepare, start, drain, drop, forward).
3004 */
Takashi Iwai877211f2005-11-17 13:59:38 +01003005int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003006 unsigned int cmd, void *arg)
3007{
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003008 snd_pcm_uframes_t *frames = arg;
3009 snd_pcm_sframes_t result;
Takashi Iwaibf1bbb52006-03-27 16:22:45 +02003010
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003011 switch (cmd) {
3012 case SNDRV_PCM_IOCTL_FORWARD:
3013 {
3014 /* provided only for OSS; capture-only and no value returned */
3015 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3016 return -EINVAL;
Takashi Iwai763e5062018-04-11 17:56:52 +02003017 result = snd_pcm_forward(substream, *frames);
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003018 return result < 0 ? result : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019 }
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003020 case SNDRV_PCM_IOCTL_HW_PARAMS:
3021 return snd_pcm_hw_params(substream, arg);
3022 case SNDRV_PCM_IOCTL_SW_PARAMS:
3023 return snd_pcm_sw_params(substream, arg);
3024 case SNDRV_PCM_IOCTL_PREPARE:
3025 return snd_pcm_prepare(substream, NULL);
3026 case SNDRV_PCM_IOCTL_START:
3027 return snd_pcm_start_lock_irq(substream);
3028 case SNDRV_PCM_IOCTL_DRAIN:
Takashi Iwai7d8e8292017-08-30 16:13:25 +02003029 return snd_pcm_drain(substream, NULL);
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003030 case SNDRV_PCM_IOCTL_DROP:
3031 return snd_pcm_drop(substream);
3032 case SNDRV_PCM_IOCTL_DELAY:
Jeffery Miller912e4c32018-04-20 23:20:46 -05003033 return snd_pcm_delay(substream, frames);
Takashi Iwaic2c86a92017-05-10 14:33:44 +02003034 default:
3035 return -EINVAL;
3036 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003037}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02003038EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3039
Takashi Iwai877211f2005-11-17 13:59:38 +01003040static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3041 loff_t * offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003042{
Takashi Iwai877211f2005-11-17 13:59:38 +01003043 struct snd_pcm_file *pcm_file;
3044 struct snd_pcm_substream *substream;
3045 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 snd_pcm_sframes_t result;
3047
3048 pcm_file = file->private_data;
3049 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003050 if (PCM_RUNTIME_CHECK(substream))
3051 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003052 runtime = substream->runtime;
3053 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3054 return -EBADFD;
3055 if (!frame_aligned(runtime, count))
3056 return -EINVAL;
3057 count = bytes_to_frames(runtime, count);
3058 result = snd_pcm_lib_read(substream, buf, count);
3059 if (result > 0)
3060 result = frames_to_bytes(runtime, result);
3061 return result;
3062}
3063
Takashi Iwai877211f2005-11-17 13:59:38 +01003064static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3065 size_t count, loff_t * offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003066{
Takashi Iwai877211f2005-11-17 13:59:38 +01003067 struct snd_pcm_file *pcm_file;
3068 struct snd_pcm_substream *substream;
3069 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003070 snd_pcm_sframes_t result;
3071
3072 pcm_file = file->private_data;
3073 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003074 if (PCM_RUNTIME_CHECK(substream))
3075 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003076 runtime = substream->runtime;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003077 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3078 return -EBADFD;
3079 if (!frame_aligned(runtime, count))
3080 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003081 count = bytes_to_frames(runtime, count);
3082 result = snd_pcm_lib_write(substream, buf, count);
3083 if (result > 0)
3084 result = frames_to_bytes(runtime, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003085 return result;
3086}
3087
Al Viro1c65d982015-04-04 00:19:32 -04003088static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003089{
Takashi Iwai877211f2005-11-17 13:59:38 +01003090 struct snd_pcm_file *pcm_file;
3091 struct snd_pcm_substream *substream;
3092 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003093 snd_pcm_sframes_t result;
3094 unsigned long i;
3095 void __user **bufs;
3096 snd_pcm_uframes_t frames;
3097
Badari Pulavartyee0b3e62006-09-30 23:28:47 -07003098 pcm_file = iocb->ki_filp->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003100 if (PCM_RUNTIME_CHECK(substream))
3101 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102 runtime = substream->runtime;
3103 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3104 return -EBADFD;
Al Viro1c65d982015-04-04 00:19:32 -04003105 if (!iter_is_iovec(to))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003106 return -EINVAL;
Al Viro1c65d982015-04-04 00:19:32 -04003107 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003108 return -EINVAL;
Al Viro1c65d982015-04-04 00:19:32 -04003109 if (!frame_aligned(runtime, to->iov->iov_len))
3110 return -EINVAL;
3111 frames = bytes_to_samples(runtime, to->iov->iov_len);
Kees Cook6da2ec52018-06-12 13:55:00 -07003112 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 if (bufs == NULL)
3114 return -ENOMEM;
Al Viro1c65d982015-04-04 00:19:32 -04003115 for (i = 0; i < to->nr_segs; ++i)
3116 bufs[i] = to->iov[i].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003117 result = snd_pcm_lib_readv(substream, bufs, frames);
3118 if (result > 0)
3119 result = frames_to_bytes(runtime, result);
3120 kfree(bufs);
3121 return result;
3122}
3123
Al Viro1c65d982015-04-04 00:19:32 -04003124static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003125{
Takashi Iwai877211f2005-11-17 13:59:38 +01003126 struct snd_pcm_file *pcm_file;
3127 struct snd_pcm_substream *substream;
3128 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129 snd_pcm_sframes_t result;
3130 unsigned long i;
3131 void __user **bufs;
3132 snd_pcm_uframes_t frames;
3133
Badari Pulavartyee0b3e62006-09-30 23:28:47 -07003134 pcm_file = iocb->ki_filp->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003136 if (PCM_RUNTIME_CHECK(substream))
3137 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003138 runtime = substream->runtime;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003139 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3140 return -EBADFD;
Al Viro1c65d982015-04-04 00:19:32 -04003141 if (!iter_is_iovec(from))
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003142 return -EINVAL;
Al Viro1c65d982015-04-04 00:19:32 -04003143 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3144 !frame_aligned(runtime, from->iov->iov_len))
3145 return -EINVAL;
3146 frames = bytes_to_samples(runtime, from->iov->iov_len);
Kees Cook6da2ec52018-06-12 13:55:00 -07003147 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003148 if (bufs == NULL)
3149 return -ENOMEM;
Al Viro1c65d982015-04-04 00:19:32 -04003150 for (i = 0; i < from->nr_segs; ++i)
3151 bufs[i] = from->iov[i].iov_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003152 result = snd_pcm_lib_writev(substream, bufs, frames);
3153 if (result > 0)
3154 result = frames_to_bytes(runtime, result);
3155 kfree(bufs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156 return result;
3157}
3158
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003159static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160{
Takashi Iwai877211f2005-11-17 13:59:38 +01003161 struct snd_pcm_file *pcm_file;
3162 struct snd_pcm_substream *substream;
3163 struct snd_pcm_runtime *runtime;
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003164 __poll_t mask, ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165 snd_pcm_uframes_t avail;
3166
3167 pcm_file = file->private_data;
3168
3169 substream = pcm_file->substream;
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003170 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3171 ok = EPOLLOUT | EPOLLWRNORM;
3172 else
3173 ok = EPOLLIN | EPOLLRDNORM;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003174 if (PCM_RUNTIME_CHECK(substream))
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003175 return ok | EPOLLERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003177 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003178 poll_wait(file, &runtime->sleep, wait);
3179
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003180 mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181 snd_pcm_stream_lock_irq(substream);
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003182 avail = snd_pcm_avail(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003183 switch (runtime->status->state) {
3184 case SNDRV_PCM_STATE_RUNNING:
3185 case SNDRV_PCM_STATE_PREPARED:
3186 case SNDRV_PCM_STATE_PAUSED:
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003187 if (avail >= runtime->control->avail_min)
3188 mask = ok;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003189 break;
3190 case SNDRV_PCM_STATE_DRAINING:
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003191 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3192 mask = ok;
3193 if (!avail)
3194 mask |= EPOLLERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003195 }
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003196 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 default:
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003198 mask = ok | EPOLLERR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003199 break;
3200 }
3201 snd_pcm_stream_unlock_irq(substream);
3202 return mask;
3203}
3204
3205/*
3206 * mmap support
3207 */
3208
3209/*
3210 * Only on coherent architectures, we can mmap the status and the control records
3211 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3212 */
3213#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3214/*
3215 * mmap status record
3216 */
Souptick Joarder41412fe2018-04-25 09:50:29 +05303217static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003218{
Dave Jiang11bac802017-02-24 14:56:41 -08003219 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
Takashi Iwai877211f2005-11-17 13:59:38 +01003220 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003221
3222 if (substream == NULL)
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003223 return VM_FAULT_SIGBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 runtime = substream->runtime;
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003225 vmf->page = virt_to_page(runtime->status);
3226 get_page(vmf->page);
3227 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003228}
3229
Alexey Dobriyanf0f37e2f2009-09-27 22:29:37 +04003230static const struct vm_operations_struct snd_pcm_vm_ops_status =
Linus Torvalds1da177e2005-04-16 15:20:36 -07003231{
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003232 .fault = snd_pcm_mmap_status_fault,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233};
3234
Takashi Iwai877211f2005-11-17 13:59:38 +01003235static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003236 struct vm_area_struct *area)
3237{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003238 long size;
3239 if (!(area->vm_flags & VM_READ))
3240 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 size = area->vm_end - area->vm_start;
Takashi Iwai877211f2005-11-17 13:59:38 +01003242 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243 return -EINVAL;
3244 area->vm_ops = &snd_pcm_vm_ops_status;
3245 area->vm_private_data = substream;
Konstantin Khlebnikov314e51b2012-10-08 16:29:02 -07003246 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247 return 0;
3248}
3249
3250/*
3251 * mmap control record
3252 */
Souptick Joarder41412fe2018-04-25 09:50:29 +05303253static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003254{
Dave Jiang11bac802017-02-24 14:56:41 -08003255 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
Takashi Iwai877211f2005-11-17 13:59:38 +01003256 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257
3258 if (substream == NULL)
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003259 return VM_FAULT_SIGBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260 runtime = substream->runtime;
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003261 vmf->page = virt_to_page(runtime->control);
3262 get_page(vmf->page);
3263 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264}
3265
Alexey Dobriyanf0f37e2f2009-09-27 22:29:37 +04003266static const struct vm_operations_struct snd_pcm_vm_ops_control =
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267{
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003268 .fault = snd_pcm_mmap_control_fault,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003269};
3270
Takashi Iwai877211f2005-11-17 13:59:38 +01003271static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003272 struct vm_area_struct *area)
3273{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274 long size;
3275 if (!(area->vm_flags & VM_READ))
3276 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003277 size = area->vm_end - area->vm_start;
Takashi Iwai877211f2005-11-17 13:59:38 +01003278 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003279 return -EINVAL;
3280 area->vm_ops = &snd_pcm_vm_ops_control;
3281 area->vm_private_data = substream;
Konstantin Khlebnikov314e51b2012-10-08 16:29:02 -07003282 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003283 return 0;
3284}
Takashi Iwai42f94592017-06-19 22:39:18 +02003285
3286static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3287{
3288 if (pcm_file->no_compat_mmap)
3289 return false;
Takashi Iwaib602aa82017-06-27 11:54:37 +02003290 /* See pcm_control_mmap_allowed() below.
3291 * Since older alsa-lib requires both status and control mmaps to be
3292 * coupled, we have to disable the status mmap for old alsa-lib, too.
3293 */
3294 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3295 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3296 return false;
3297 return true;
3298}
3299
3300static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3301{
3302 if (pcm_file->no_compat_mmap)
3303 return false;
3304 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
Takashi Iwai42f94592017-06-19 22:39:18 +02003305 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3306 * thus it effectively assures the manual update of appl_ptr.
Takashi Iwai42f94592017-06-19 22:39:18 +02003307 */
3308 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3309 return false;
3310 return true;
3311}
3312
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313#else /* ! coherent mmap */
3314/*
3315 * don't support mmap for status and control records.
3316 */
Takashi Iwai42f94592017-06-19 22:39:18 +02003317#define pcm_status_mmap_allowed(pcm_file) false
Takashi Iwaib602aa82017-06-27 11:54:37 +02003318#define pcm_control_mmap_allowed(pcm_file) false
Takashi Iwai42f94592017-06-19 22:39:18 +02003319
Takashi Iwai877211f2005-11-17 13:59:38 +01003320static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003321 struct vm_area_struct *area)
3322{
3323 return -ENXIO;
3324}
Takashi Iwai877211f2005-11-17 13:59:38 +01003325static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003326 struct vm_area_struct *area)
3327{
3328 return -ENXIO;
3329}
3330#endif /* coherent mmap */
3331
Takashi Iwai9eb4a062009-11-26 12:43:39 +01003332static inline struct page *
3333snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3334{
3335 void *vaddr = substream->runtime->dma_area + ofs;
3336 return virt_to_page(vaddr);
3337}
3338
Linus Torvalds1da177e2005-04-16 15:20:36 -07003339/*
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003340 * fault callback for mmapping a RAM page
Linus Torvalds1da177e2005-04-16 15:20:36 -07003341 */
Souptick Joarder41412fe2018-04-25 09:50:29 +05303342static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003343{
Dave Jiang11bac802017-02-24 14:56:41 -08003344 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
Takashi Iwai877211f2005-11-17 13:59:38 +01003345 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003346 unsigned long offset;
3347 struct page * page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003348 size_t dma_bytes;
3349
3350 if (substream == NULL)
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003351 return VM_FAULT_SIGBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003352 runtime = substream->runtime;
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003353 offset = vmf->pgoff << PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003354 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3355 if (offset > dma_bytes - PAGE_SIZE)
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003356 return VM_FAULT_SIGBUS;
Takashi Iwai9eb4a062009-11-26 12:43:39 +01003357 if (substream->ops->page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358 page = substream->ops->page(substream, offset);
Takashi Iwai9eb4a062009-11-26 12:43:39 +01003359 else
3360 page = snd_pcm_default_page_ops(substream, offset);
3361 if (!page)
3362 return VM_FAULT_SIGBUS;
Nick Pigginb5810032005-10-29 18:16:12 -07003363 get_page(page);
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003364 vmf->page = page;
3365 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366}
3367
Takashi Iwai657b1982009-11-26 12:40:21 +01003368static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3369 .open = snd_pcm_mmap_data_open,
3370 .close = snd_pcm_mmap_data_close,
3371};
3372
3373static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003374 .open = snd_pcm_mmap_data_open,
3375 .close = snd_pcm_mmap_data_close,
Nick Piggin3ad5afc2007-12-13 16:15:00 +01003376 .fault = snd_pcm_mmap_data_fault,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003377};
3378
3379/*
3380 * mmap the DMA buffer on RAM
3381 */
Takashi Iwai30b771c2014-10-30 15:02:50 +01003382
3383/**
3384 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3385 * @substream: PCM substream
3386 * @area: VMA
3387 *
3388 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3389 * this function is invoked implicitly.
3390 */
Takashi Iwai18a2b962011-09-28 17:12:59 +02003391int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3392 struct vm_area_struct *area)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393{
Konstantin Khlebnikov314e51b2012-10-08 16:29:02 -07003394 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
Takashi Iwaia5606f82013-10-24 14:25:32 +02003395#ifdef CONFIG_GENERIC_ALLOCATOR
Nicolin Chen05503212013-10-23 11:47:43 +08003396 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3397 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3398 return remap_pfn_range(area, area->vm_start,
3399 substream->dma_buffer.addr >> PAGE_SHIFT,
3400 area->vm_end - area->vm_start, area->vm_page_prot);
3401 }
Takashi Iwaia5606f82013-10-24 14:25:32 +02003402#endif /* CONFIG_GENERIC_ALLOCATOR */
Takashi Iwai49d776f2014-10-24 12:36:23 +02003403#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
Geert Uytterhoevenabe594c2017-07-09 21:31:02 +02003404 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
Takashi Iwai657b1982009-11-26 12:40:21 +01003405 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3406 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3407 area,
3408 substream->runtime->dma_area,
3409 substream->runtime->dma_addr,
Stefan Roese9066ae72018-03-26 16:10:21 +02003410 substream->runtime->dma_bytes);
Takashi Iwai49d776f2014-10-24 12:36:23 +02003411#endif /* CONFIG_X86 */
Takashi Iwai657b1982009-11-26 12:40:21 +01003412 /* mmap with fault handler */
3413 area->vm_ops = &snd_pcm_vm_ops_data_fault;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003414 return 0;
3415}
Takashi Iwai18a2b962011-09-28 17:12:59 +02003416EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003417
3418/*
3419 * mmap the DMA buffer on I/O memory area
3420 */
3421#if SNDRV_PCM_INFO_MMAP_IOMEM
Takashi Iwai30b771c2014-10-30 15:02:50 +01003422/**
3423 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3424 * @substream: PCM substream
3425 * @area: VMA
3426 *
3427 * When your hardware uses the iomapped pages as the hardware buffer and
3428 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3429 * is supposed to work only on limited architectures.
3430 */
Takashi Iwai877211f2005-11-17 13:59:38 +01003431int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3432 struct vm_area_struct *area)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003433{
Luis de Bethencourt3c7f6912018-01-16 13:26:26 +00003434 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003435
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
Linus Torvalds0fe09a42013-04-19 10:01:04 -07003437 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02003439EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440#endif /* SNDRV_PCM_INFO_MMAP */
3441
3442/*
3443 * mmap DMA buffer
3444 */
Takashi Iwai877211f2005-11-17 13:59:38 +01003445int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003446 struct vm_area_struct *area)
3447{
Takashi Iwai877211f2005-11-17 13:59:38 +01003448 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449 long size;
3450 unsigned long offset;
3451 size_t dma_bytes;
Takashi Iwai657b1982009-11-26 12:40:21 +01003452 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003453
3454 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3455 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3456 return -EINVAL;
3457 } else {
3458 if (!(area->vm_flags & VM_READ))
3459 return -EINVAL;
3460 }
3461 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003462 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3463 return -EBADFD;
3464 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3465 return -ENXIO;
3466 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3467 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3468 return -EINVAL;
3469 size = area->vm_end - area->vm_start;
3470 offset = area->vm_pgoff << PAGE_SHIFT;
3471 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3472 if ((size_t)size > dma_bytes)
3473 return -EINVAL;
3474 if (offset > dma_bytes - size)
3475 return -EINVAL;
3476
Takashi Iwai657b1982009-11-26 12:40:21 +01003477 area->vm_ops = &snd_pcm_vm_ops_data;
3478 area->vm_private_data = substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003479 if (substream->ops->mmap)
Takashi Iwai657b1982009-11-26 12:40:21 +01003480 err = substream->ops->mmap(substream, area);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003481 else
Takashi Iwai18a2b962011-09-28 17:12:59 +02003482 err = snd_pcm_lib_default_mmap(substream, area);
Takashi Iwai657b1982009-11-26 12:40:21 +01003483 if (!err)
3484 atomic_inc(&substream->mmap_count);
3485 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003486}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02003487EXPORT_SYMBOL(snd_pcm_mmap_data);
3488
Linus Torvalds1da177e2005-04-16 15:20:36 -07003489static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3490{
Takashi Iwai877211f2005-11-17 13:59:38 +01003491 struct snd_pcm_file * pcm_file;
3492 struct snd_pcm_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003493 unsigned long offset;
3494
3495 pcm_file = file->private_data;
3496 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003497 if (PCM_RUNTIME_CHECK(substream))
3498 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003499
3500 offset = area->vm_pgoff << PAGE_SHIFT;
3501 switch (offset) {
3502 case SNDRV_PCM_MMAP_OFFSET_STATUS:
Takashi Iwai42f94592017-06-19 22:39:18 +02003503 if (!pcm_status_mmap_allowed(pcm_file))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504 return -ENXIO;
3505 return snd_pcm_mmap_status(substream, file, area);
3506 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
Takashi Iwaib602aa82017-06-27 11:54:37 +02003507 if (!pcm_control_mmap_allowed(pcm_file))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003508 return -ENXIO;
3509 return snd_pcm_mmap_control(substream, file, area);
3510 default:
3511 return snd_pcm_mmap_data(substream, file, area);
3512 }
3513 return 0;
3514}
3515
3516static int snd_pcm_fasync(int fd, struct file * file, int on)
3517{
Takashi Iwai877211f2005-11-17 13:59:38 +01003518 struct snd_pcm_file * pcm_file;
3519 struct snd_pcm_substream *substream;
3520 struct snd_pcm_runtime *runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003521
3522 pcm_file = file->private_data;
3523 substream = pcm_file->substream;
Takashi Iwai7eaa9432008-08-08 17:09:09 +02003524 if (PCM_RUNTIME_CHECK(substream))
Takashi Iwaid05468b2010-04-07 18:29:46 +02003525 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003526 runtime = substream->runtime;
Takashi Iwaid05468b2010-04-07 18:29:46 +02003527 return fasync_helper(fd, file, on, &runtime->fasync);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003528}
3529
3530/*
3531 * ioctl32 compat
3532 */
3533#ifdef CONFIG_COMPAT
3534#include "pcm_compat.c"
3535#else
3536#define snd_pcm_ioctl_compat NULL
3537#endif
3538
3539/*
3540 * To be removed helpers to keep binary compatibility
3541 */
3542
Takashi Iwai59d48582005-12-01 10:51:58 +01003543#ifdef CONFIG_SND_SUPPORT_OLD_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07003544#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3545#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3546
Takashi Iwai877211f2005-11-17 13:59:38 +01003547static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3548 struct snd_pcm_hw_params_old *oparams)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549{
3550 unsigned int i;
3551
3552 memset(params, 0, sizeof(*params));
3553 params->flags = oparams->flags;
3554 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3555 params->masks[i].bits[0] = oparams->masks[i];
3556 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3557 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3558 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3559 params->info = oparams->info;
3560 params->msbits = oparams->msbits;
3561 params->rate_num = oparams->rate_num;
3562 params->rate_den = oparams->rate_den;
3563 params->fifo_size = oparams->fifo_size;
3564}
3565
Takashi Iwai877211f2005-11-17 13:59:38 +01003566static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3567 struct snd_pcm_hw_params *params)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003568{
3569 unsigned int i;
3570
3571 memset(oparams, 0, sizeof(*oparams));
3572 oparams->flags = params->flags;
3573 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3574 oparams->masks[i] = params->masks[i].bits[0];
3575 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3576 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3577 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3578 oparams->info = params->info;
3579 oparams->msbits = params->msbits;
3580 oparams->rate_num = params->rate_num;
3581 oparams->rate_den = params->rate_den;
3582 oparams->fifo_size = params->fifo_size;
3583}
3584
Takashi Iwai877211f2005-11-17 13:59:38 +01003585static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3586 struct snd_pcm_hw_params_old __user * _oparams)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003587{
Takashi Iwai877211f2005-11-17 13:59:38 +01003588 struct snd_pcm_hw_params *params;
3589 struct snd_pcm_hw_params_old *oparams = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590 int err;
3591
3592 params = kmalloc(sizeof(*params), GFP_KERNEL);
Li Zefanef44a1e2009-04-10 09:43:08 +08003593 if (!params)
3594 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595
Li Zefanef44a1e2009-04-10 09:43:08 +08003596 oparams = memdup_user(_oparams, sizeof(*oparams));
3597 if (IS_ERR(oparams)) {
3598 err = PTR_ERR(oparams);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003599 goto out;
3600 }
3601 snd_pcm_hw_convert_from_old_params(params, oparams);
3602 err = snd_pcm_hw_refine(substream, params);
Takashi Sakamotof74ae152017-06-11 23:56:12 +09003603 if (err < 0)
3604 goto out_old;
Li Zefanef44a1e2009-04-10 09:43:08 +08003605
Takashi Sakamotof74ae152017-06-11 23:56:12 +09003606 err = fixup_unreferenced_params(substream, params);
3607 if (err < 0)
3608 goto out_old;
3609
3610 snd_pcm_hw_convert_to_old_params(oparams, params);
3611 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3612 err = -EFAULT;
3613out_old:
Li Zefanef44a1e2009-04-10 09:43:08 +08003614 kfree(oparams);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615out:
3616 kfree(params);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003617 return err;
3618}
3619
Takashi Iwai877211f2005-11-17 13:59:38 +01003620static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3621 struct snd_pcm_hw_params_old __user * _oparams)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003622{
Takashi Iwai877211f2005-11-17 13:59:38 +01003623 struct snd_pcm_hw_params *params;
3624 struct snd_pcm_hw_params_old *oparams = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003625 int err;
3626
3627 params = kmalloc(sizeof(*params), GFP_KERNEL);
Li Zefanef44a1e2009-04-10 09:43:08 +08003628 if (!params)
3629 return -ENOMEM;
3630
3631 oparams = memdup_user(_oparams, sizeof(*oparams));
3632 if (IS_ERR(oparams)) {
3633 err = PTR_ERR(oparams);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 goto out;
3635 }
Takashi Sakamotof74ae152017-06-11 23:56:12 +09003636
Linus Torvalds1da177e2005-04-16 15:20:36 -07003637 snd_pcm_hw_convert_from_old_params(params, oparams);
3638 err = snd_pcm_hw_params(substream, params);
Takashi Sakamotof74ae152017-06-11 23:56:12 +09003639 if (err < 0)
3640 goto out_old;
Li Zefanef44a1e2009-04-10 09:43:08 +08003641
Takashi Sakamotof74ae152017-06-11 23:56:12 +09003642 snd_pcm_hw_convert_to_old_params(oparams, params);
3643 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3644 err = -EFAULT;
3645out_old:
Li Zefanef44a1e2009-04-10 09:43:08 +08003646 kfree(oparams);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647out:
3648 kfree(params);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003649 return err;
3650}
Takashi Iwai59d48582005-12-01 10:51:58 +01003651#endif /* CONFIG_SND_SUPPORT_OLD_API */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003652
Cliff Cai70036092008-09-03 10:54:36 +02003653#ifndef CONFIG_MMU
Daniel Glöckner55c63bd2010-03-09 12:57:52 -05003654static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3655 unsigned long addr,
3656 unsigned long len,
3657 unsigned long pgoff,
3658 unsigned long flags)
Cliff Cai70036092008-09-03 10:54:36 +02003659{
Daniel Glöckner55c63bd2010-03-09 12:57:52 -05003660 struct snd_pcm_file *pcm_file = file->private_data;
3661 struct snd_pcm_substream *substream = pcm_file->substream;
3662 struct snd_pcm_runtime *runtime = substream->runtime;
3663 unsigned long offset = pgoff << PAGE_SHIFT;
3664
3665 switch (offset) {
3666 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3667 return (unsigned long)runtime->status;
3668 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3669 return (unsigned long)runtime->control;
3670 default:
3671 return (unsigned long)runtime->dma_area + offset;
3672 }
Cliff Cai70036092008-09-03 10:54:36 +02003673}
3674#else
Daniel Glöckner55c63bd2010-03-09 12:57:52 -05003675# define snd_pcm_get_unmapped_area NULL
Cliff Cai70036092008-09-03 10:54:36 +02003676#endif
3677
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678/*
3679 * Register section
3680 */
3681
Arjan van de Ven9c2e08c2007-02-12 00:55:37 -08003682const struct file_operations snd_pcm_f_ops[2] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683 {
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003684 .owner = THIS_MODULE,
3685 .write = snd_pcm_write,
Al Viro1c65d982015-04-04 00:19:32 -04003686 .write_iter = snd_pcm_writev,
Clemens Ladischf87135f2005-11-20 14:06:59 +01003687 .open = snd_pcm_playback_open,
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003688 .release = snd_pcm_release,
Takashi Iwai02f48652010-04-13 11:49:04 +02003689 .llseek = no_llseek,
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003690 .poll = snd_pcm_poll,
Takashi Iwai67616fe2017-08-30 15:39:32 +02003691 .unlocked_ioctl = snd_pcm_ioctl,
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003692 .compat_ioctl = snd_pcm_ioctl_compat,
3693 .mmap = snd_pcm_mmap,
3694 .fasync = snd_pcm_fasync,
Daniel Glöckner55c63bd2010-03-09 12:57:52 -05003695 .get_unmapped_area = snd_pcm_get_unmapped_area,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003696 },
3697 {
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003698 .owner = THIS_MODULE,
3699 .read = snd_pcm_read,
Al Viro1c65d982015-04-04 00:19:32 -04003700 .read_iter = snd_pcm_readv,
Clemens Ladischf87135f2005-11-20 14:06:59 +01003701 .open = snd_pcm_capture_open,
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003702 .release = snd_pcm_release,
Takashi Iwai02f48652010-04-13 11:49:04 +02003703 .llseek = no_llseek,
Takashi Iwai6448fcb2018-04-11 18:05:00 +02003704 .poll = snd_pcm_poll,
Takashi Iwai67616fe2017-08-30 15:39:32 +02003705 .unlocked_ioctl = snd_pcm_ioctl,
Clemens Ladisch2af677f2005-11-20 14:03:48 +01003706 .compat_ioctl = snd_pcm_ioctl_compat,
3707 .mmap = snd_pcm_mmap,
3708 .fasync = snd_pcm_fasync,
Daniel Glöckner55c63bd2010-03-09 12:57:52 -05003709 .get_unmapped_area = snd_pcm_get_unmapped_area,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 }
3711};