Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 | 7 | #include <linux/mm.h> |
da155d5b | 8 | #include <linux/module.h> |
1da177e4 LT |
9 | #include <linux/file.h> |
10 | #include <linux/slab.h> | |
174cd4b1 | 11 | #include <linux/sched/signal.h> |
1da177e4 | 12 | #include <linux/time.h> |
e8db0be1 | 13 | #include <linux/pm_qos.h> |
6cbbfe1c | 14 | #include <linux/io.h> |
657b1989 | 15 | #include <linux/dma-mapping.h> |
1da177e4 LT |
16 | #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> | |
e2e40f2c | 23 | #include <linux/uio.h> |
b888a5f7 | 24 | #include <linux/delay.h> |
1da177e4 | 25 | |
2c4842d3 TS |
26 | #include "pcm_local.h" |
27 | ||
37567c55 | 28 | #ifdef CONFIG_SND_DEBUG |
be4e31da TS |
29 | #define CREATE_TRACE_POINTS |
30 | #include "pcm_param_trace.h" | |
37567c55 TS |
31 | #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 | |
be4e31da | 37 | |
1da177e4 LT |
38 | /* |
39 | * Compatibility | |
40 | */ | |
41 | ||
877211f5 | 42 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
43 | unsigned int flags; |
44 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
45 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 46 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
47 | 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; | |
877211f5 | 54 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
55 | unsigned char reserved[64]; |
56 | }; | |
57 | ||
59d48582 | 58 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
59 | #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) | |
1da177e4 | 61 | |
877211f5 TI |
62 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
63 | struct snd_pcm_hw_params_old __user * _oparams); | |
64 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
65 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 66 | #endif |
f87135f5 | 67 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
68 | |
69 | /* | |
70 | * | |
71 | */ | |
72 | ||
7af142f7 | 73 | static DECLARE_RWSEM(snd_pcm_link_rwsem); |
1da177e4 | 74 | |
73365cb1 | 75 | void snd_pcm_group_init(struct snd_pcm_group *group) |
67ec1072 | 76 | { |
73365cb1 TI |
77 | spin_lock_init(&group->lock); |
78 | mutex_init(&group->mutex); | |
79 | INIT_LIST_HEAD(&group->substreams); | |
0e279dce | 80 | refcount_set(&group->refs, 1); |
67ec1072 TI |
81 | } |
82 | ||
f57f3df0 TI |
83 | /* define group lock helpers */ |
84 | #define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \ | |
85 | static 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); \ | |
10aa7cad AMG |
91 | } |
92 | ||
f57f3df0 TI |
93 | DEFINE_PCM_GROUP_LOCK(lock, lock); |
94 | DEFINE_PCM_GROUP_LOCK(unlock, unlock); | |
95 | DEFINE_PCM_GROUP_LOCK(lock_irq, lock); | |
96 | DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock); | |
10aa7cad | 97 | |
30b771cf TI |
98 | /** |
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 | */ | |
7af142f7 TI |
106 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
107 | { | |
ef2056b8 | 108 | snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic); |
7af142f7 TI |
109 | } |
110 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
111 | ||
30b771cf TI |
112 | /** |
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 | */ | |
7af142f7 TI |
118 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
119 | { | |
ef2056b8 | 120 | snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic); |
7af142f7 TI |
121 | } |
122 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
123 | ||
30b771cf TI |
124 | /** |
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 | */ | |
7af142f7 TI |
132 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
133 | { | |
ef2056b8 TI |
134 | snd_pcm_group_lock_irq(&substream->self_group, |
135 | substream->pcm->nonatomic); | |
7af142f7 TI |
136 | } |
137 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
138 | ||
30b771cf TI |
139 | /** |
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 | */ | |
7af142f7 TI |
145 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
146 | { | |
ef2056b8 TI |
147 | snd_pcm_group_unlock_irq(&substream->self_group, |
148 | substream->pcm->nonatomic); | |
7af142f7 TI |
149 | } |
150 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
151 | ||
152 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
153 | { | |
ef2056b8 TI |
154 | 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; | |
7af142f7 TI |
160 | } |
161 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
162 | ||
30b771cf TI |
163 | /** |
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 | */ | |
7af142f7 TI |
170 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
171 | unsigned long flags) | |
172 | { | |
ef2056b8 TI |
173 | if (substream->pcm->nonatomic) |
174 | mutex_unlock(&substream->self_group.mutex); | |
175 | else | |
176 | spin_unlock_irqrestore(&substream->self_group.lock, flags); | |
7af142f7 TI |
177 | } |
178 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 | 179 | |
877211f5 | 180 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 181 | { |
877211f5 TI |
182 | struct snd_pcm *pcm = substream->pcm; |
183 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 184 | |
1da177e4 LT |
185 | 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)); | |
e11f0f90 | 197 | |
1da177e4 LT |
198 | return 0; |
199 | } | |
200 | ||
877211f5 TI |
201 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
202 | struct snd_pcm_info __user * _info) | |
1da177e4 | 203 | { |
877211f5 | 204 | struct snd_pcm_info *info; |
1da177e4 LT |
205 | 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 | ||
63825f3a TI |
219 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
220 | { | |
221 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
222 | return false; | |
425da159 CH |
223 | |
224 | if (substream->ops->mmap || | |
225 | substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV) | |
226 | return true; | |
227 | ||
228 | return dma_can_mmap(substream->dma_buffer.dev.dev); | |
63825f3a TI |
229 | } |
230 | ||
561e1cad TS |
231 | static int constrain_mask_params(struct snd_pcm_substream *substream, |
232 | struct snd_pcm_hw_params *params) | |
1da177e4 | 233 | { |
561e1cad TS |
234 | struct snd_pcm_hw_constraints *constrs = |
235 | &substream->runtime->hw_constraints; | |
236 | struct snd_mask *m; | |
1da177e4 | 237 | unsigned int k; |
561e1cad TS |
238 | struct snd_mask old_mask; |
239 | int changed; | |
1da177e4 LT |
240 | |
241 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
242 | m = hw_param_mask(params, k); | |
243 | if (snd_mask_empty(m)) | |
244 | return -EINVAL; | |
d81052f9 TS |
245 | |
246 | /* This parameter is not requested to change by a caller. */ | |
1da177e4 LT |
247 | if (!(params->rmask & (1 << k))) |
248 | continue; | |
561e1cad TS |
249 | |
250 | if (trace_hw_mask_param_enabled()) | |
251 | old_mask = *m; | |
252 | ||
1da177e4 | 253 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); |
1da177e4 LT |
254 | if (changed < 0) |
255 | return changed; | |
82e7d501 TS |
256 | if (changed == 0) |
257 | continue; | |
561e1cad | 258 | |
d81052f9 | 259 | /* Set corresponding flag so that the caller gets it. */ |
82e7d501 TS |
260 | trace_hw_mask_param(substream, k, 0, &old_mask, m); |
261 | params->cmask |= 1 << k; | |
1da177e4 LT |
262 | } |
263 | ||
561e1cad TS |
264 | return 0; |
265 | } | |
266 | ||
3432fa04 TS |
267 | static int constrain_interval_params(struct snd_pcm_substream *substream, |
268 | struct snd_pcm_hw_params *params) | |
269 | { | |
270 | struct snd_pcm_hw_constraints *constrs = | |
271 | &substream->runtime->hw_constraints; | |
272 | struct snd_interval *i; | |
273 | unsigned int k; | |
274 | struct snd_interval old_interval; | |
275 | int changed; | |
276 | ||
1da177e4 LT |
277 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { |
278 | i = hw_param_interval(params, k); | |
279 | if (snd_interval_empty(i)) | |
280 | return -EINVAL; | |
d81052f9 TS |
281 | |
282 | /* This parameter is not requested to change by a caller. */ | |
1da177e4 LT |
283 | if (!(params->rmask & (1 << k))) |
284 | continue; | |
3432fa04 TS |
285 | |
286 | if (trace_hw_interval_param_enabled()) | |
287 | old_interval = *i; | |
288 | ||
1da177e4 | 289 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); |
1da177e4 LT |
290 | if (changed < 0) |
291 | return changed; | |
82e7d501 TS |
292 | if (changed == 0) |
293 | continue; | |
3432fa04 | 294 | |
d81052f9 | 295 | /* Set corresponding flag so that the caller gets it. */ |
82e7d501 TS |
296 | trace_hw_interval_param(substream, k, 0, &old_interval, i); |
297 | params->cmask |= 1 << k; | |
1da177e4 LT |
298 | } |
299 | ||
3432fa04 TS |
300 | return 0; |
301 | } | |
302 | ||
9cc07f55 TS |
303 | static int constrain_params_by_rules(struct snd_pcm_substream *substream, |
304 | struct snd_pcm_hw_params *params) | |
1da177e4 | 305 | { |
9cc07f55 TS |
306 | struct snd_pcm_hw_constraints *constrs = |
307 | &substream->runtime->hw_constraints; | |
1da177e4 | 308 | unsigned int k; |
5730f9f7 | 309 | unsigned int *rstamps; |
1da177e4 | 310 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; |
d81052f9 | 311 | unsigned int stamp; |
a1c06e39 TS |
312 | struct snd_pcm_hw_rule *r; |
313 | unsigned int d; | |
9cc07f55 TS |
314 | struct snd_mask old_mask; |
315 | struct snd_interval old_interval; | |
a1c06e39 | 316 | bool again; |
5730f9f7 | 317 | int changed, err = 0; |
1da177e4 | 318 | |
d81052f9 TS |
319 | /* |
320 | * Each application of rule has own sequence number. | |
321 | * | |
322 | * Each member of 'rstamps' array represents the sequence number of | |
323 | * recent application of corresponding rule. | |
324 | */ | |
5730f9f7 TI |
325 | rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL); |
326 | if (!rstamps) | |
327 | return -ENOMEM; | |
d81052f9 TS |
328 | |
329 | /* | |
330 | * Each member of 'vstamps' array represents the sequence number of | |
331 | * recent application of rule in which corresponding parameters were | |
332 | * changed. | |
333 | * | |
334 | * In initial state, elements corresponding to parameters requested by | |
335 | * a caller is 1. For unrequested parameters, corresponding members | |
336 | * have 0 so that the parameters are never changed anymore. | |
337 | */ | |
9cc07f55 | 338 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
1da177e4 | 339 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; |
d81052f9 TS |
340 | |
341 | /* Due to the above design, actual sequence number starts at 2. */ | |
342 | stamp = 2; | |
0d4e3999 | 343 | retry: |
d81052f9 | 344 | /* Apply all rules in order. */ |
a1c06e39 | 345 | again = false; |
0d4e3999 | 346 | for (k = 0; k < constrs->rules_num; k++) { |
a1c06e39 | 347 | r = &constrs->rules[k]; |
d81052f9 TS |
348 | |
349 | /* | |
350 | * Check condition bits of this rule. When the rule has | |
351 | * some condition bits, parameter without the bits is | |
352 | * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP | |
353 | * is an example of the condition bits. | |
354 | */ | |
0d4e3999 TS |
355 | if (r->cond && !(r->cond & params->flags)) |
356 | continue; | |
d81052f9 TS |
357 | |
358 | /* | |
359 | * The 'deps' array includes maximum three dependencies | |
360 | * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth | |
361 | * member of this array is a sentinel and should be | |
362 | * negative value. | |
363 | * | |
364 | * This rule should be processed in this time when dependent | |
365 | * parameters were changed at former applications of the other | |
366 | * rules. | |
367 | */ | |
0d4e3999 | 368 | for (d = 0; r->deps[d] >= 0; d++) { |
d656b4a6 | 369 | if (vstamps[r->deps[d]] > rstamps[k]) |
0d4e3999 | 370 | break; |
0d4e3999 | 371 | } |
d656b4a6 | 372 | if (r->deps[d] < 0) |
0d4e3999 | 373 | continue; |
be4e31da | 374 | |
0d4e3999 TS |
375 | if (trace_hw_mask_param_enabled()) { |
376 | if (hw_is_mask(r->var)) | |
377 | old_mask = *hw_param_mask(params, r->var); | |
378 | } | |
379 | if (trace_hw_interval_param_enabled()) { | |
380 | if (hw_is_interval(r->var)) | |
381 | old_interval = *hw_param_interval(params, r->var); | |
382 | } | |
c6706de0 | 383 | |
0d4e3999 | 384 | changed = r->func(params, r); |
5730f9f7 TI |
385 | if (changed < 0) { |
386 | err = changed; | |
387 | goto out; | |
388 | } | |
c6706de0 | 389 | |
d81052f9 | 390 | /* |
82e7d501 | 391 | * When the parameter is changed, notify it to the caller |
d81052f9 TS |
392 | * by corresponding returned bit, then preparing for next |
393 | * iteration. | |
394 | */ | |
0d4e3999 | 395 | if (changed && r->var >= 0) { |
82e7d501 TS |
396 | if (hw_is_mask(r->var)) { |
397 | trace_hw_mask_param(substream, r->var, | |
398 | k + 1, &old_mask, | |
399 | hw_param_mask(params, r->var)); | |
1da177e4 | 400 | } |
82e7d501 TS |
401 | if (hw_is_interval(r->var)) { |
402 | trace_hw_interval_param(substream, r->var, | |
403 | k + 1, &old_interval, | |
404 | hw_param_interval(params, r->var)); | |
1da177e4 | 405 | } |
82e7d501 | 406 | |
0d4e3999 TS |
407 | params->cmask |= (1 << r->var); |
408 | vstamps[r->var] = stamp; | |
a1c06e39 | 409 | again = true; |
1da177e4 | 410 | } |
f74ae15f | 411 | |
82e7d501 | 412 | rstamps[k] = stamp++; |
0d4e3999 TS |
413 | } |
414 | ||
d81052f9 | 415 | /* Iterate to evaluate all rules till no parameters are changed. */ |
0d4e3999 TS |
416 | if (again) |
417 | goto retry; | |
9cc07f55 | 418 | |
5730f9f7 TI |
419 | out: |
420 | kfree(rstamps); | |
421 | return err; | |
9cc07f55 TS |
422 | } |
423 | ||
f9a076bf TS |
424 | static int fixup_unreferenced_params(struct snd_pcm_substream *substream, |
425 | struct snd_pcm_hw_params *params) | |
426 | { | |
427 | const struct snd_interval *i; | |
428 | const struct snd_mask *m; | |
429 | int err; | |
430 | ||
1da177e4 | 431 | if (!params->msbits) { |
f9a076bf | 432 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
433 | if (snd_interval_single(i)) |
434 | params->msbits = snd_interval_value(i); | |
435 | } | |
436 | ||
437 | if (!params->rate_den) { | |
f9a076bf | 438 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 LT |
439 | if (snd_interval_single(i)) { |
440 | params->rate_num = snd_interval_value(i); | |
441 | params->rate_den = 1; | |
442 | } | |
443 | } | |
444 | ||
f9a076bf TS |
445 | if (!params->fifo_size) { |
446 | m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
447 | i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
448 | if (snd_mask_single(m) && snd_interval_single(i)) { | |
449 | err = substream->ops->ioctl(substream, | |
450 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
451 | if (err < 0) | |
452 | return err; | |
453 | } | |
454 | } | |
455 | ||
63825f3a | 456 | if (!params->info) { |
7802fb52 TS |
457 | params->info = substream->runtime->hw.info; |
458 | params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | | |
459 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
460 | if (!hw_support_mmap(substream)) |
461 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
462 | SNDRV_PCM_INFO_MMAP_VALID); | |
463 | } | |
7802fb52 | 464 | |
f9a076bf TS |
465 | return 0; |
466 | } | |
467 | ||
9cc07f55 TS |
468 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
469 | struct snd_pcm_hw_params *params) | |
470 | { | |
9cc07f55 TS |
471 | int err; |
472 | ||
473 | params->info = 0; | |
474 | params->fifo_size = 0; | |
475 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
476 | params->msbits = 0; | |
477 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
478 | params->rate_num = 0; | |
479 | params->rate_den = 0; | |
8bea869c | 480 | } |
9cc07f55 TS |
481 | |
482 | err = constrain_mask_params(substream, params); | |
483 | if (err < 0) | |
484 | return err; | |
485 | ||
486 | err = constrain_interval_params(substream, params); | |
487 | if (err < 0) | |
488 | return err; | |
489 | ||
490 | err = constrain_params_by_rules(substream, params); | |
491 | if (err < 0) | |
492 | return err; | |
493 | ||
1da177e4 | 494 | params->rmask = 0; |
7802fb52 | 495 | |
1da177e4 LT |
496 | return 0; |
497 | } | |
e88e8ae6 TI |
498 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
499 | ||
877211f5 TI |
500 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
501 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 502 | { |
877211f5 | 503 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
504 | int err; |
505 | ||
ef44a1ec LZ |
506 | params = memdup_user(_params, sizeof(*params)); |
507 | if (IS_ERR(params)) | |
508 | return PTR_ERR(params); | |
509 | ||
1da177e4 | 510 | err = snd_pcm_hw_refine(substream, params); |
f74ae15f TS |
511 | if (err < 0) |
512 | goto end; | |
ef44a1ec | 513 | |
f74ae15f TS |
514 | err = fixup_unreferenced_params(substream, params); |
515 | if (err < 0) | |
516 | goto end; | |
ef44a1ec | 517 | |
f74ae15f TS |
518 | if (copy_to_user(_params, params, sizeof(*params))) |
519 | err = -EFAULT; | |
520 | end: | |
1da177e4 LT |
521 | kfree(params); |
522 | return err; | |
523 | } | |
524 | ||
9442e691 TI |
525 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
526 | { | |
527 | int usecs; | |
528 | ||
529 | if (! runtime->rate) | |
530 | return -1; /* invalid */ | |
531 | ||
532 | /* take 75% of period time as the deadline */ | |
533 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
534 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
535 | runtime->rate; | |
536 | ||
537 | return usecs; | |
538 | } | |
539 | ||
9b0573c0 TI |
540 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
541 | { | |
542 | snd_pcm_stream_lock_irq(substream); | |
543 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
544 | substream->runtime->status->state = state; | |
545 | snd_pcm_stream_unlock_irq(substream); | |
546 | } | |
547 | ||
90bbaf66 JY |
548 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
549 | int event) | |
550 | { | |
551 | #ifdef CONFIG_SND_PCM_TIMER | |
552 | if (substream->timer) | |
553 | snd_timer_notify(substream->timer, event, | |
554 | &substream->runtime->trigger_tstamp); | |
555 | #endif | |
556 | } | |
557 | ||
60f96aae TS |
558 | /** |
559 | * snd_pcm_hw_param_choose - choose a configuration defined by @params | |
560 | * @pcm: PCM instance | |
561 | * @params: the hw_params instance | |
562 | * | |
563 | * Choose one configuration from configuration space defined by @params. | |
564 | * The configuration chosen is that obtained fixing in this order: | |
565 | * first access, first format, first subformat, min channels, | |
566 | * min rate, min period time, max buffer size, min tick time | |
567 | * | |
568 | * Return: Zero if successful, or a negative error code on failure. | |
569 | */ | |
570 | static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, | |
571 | struct snd_pcm_hw_params *params) | |
572 | { | |
573 | static const int vars[] = { | |
574 | SNDRV_PCM_HW_PARAM_ACCESS, | |
575 | SNDRV_PCM_HW_PARAM_FORMAT, | |
576 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
577 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
578 | SNDRV_PCM_HW_PARAM_RATE, | |
579 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
580 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
581 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
582 | -1 | |
583 | }; | |
584 | const int *v; | |
7b8a54af TS |
585 | struct snd_mask old_mask; |
586 | struct snd_interval old_interval; | |
82e7d501 | 587 | int changed; |
60f96aae TS |
588 | |
589 | for (v = vars; *v != -1; v++) { | |
7b8a54af TS |
590 | /* Keep old parameter to trace. */ |
591 | if (trace_hw_mask_param_enabled()) { | |
592 | if (hw_is_mask(*v)) | |
593 | old_mask = *hw_param_mask(params, *v); | |
594 | } | |
595 | if (trace_hw_interval_param_enabled()) { | |
596 | if (hw_is_interval(*v)) | |
597 | old_interval = *hw_param_interval(params, *v); | |
598 | } | |
60f96aae | 599 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) |
82e7d501 | 600 | changed = snd_pcm_hw_param_first(pcm, params, *v, NULL); |
60f96aae | 601 | else |
82e7d501 | 602 | changed = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
e1a3a981 | 603 | if (changed < 0) |
82e7d501 TS |
604 | return changed; |
605 | if (changed == 0) | |
606 | continue; | |
7b8a54af | 607 | |
82e7d501 | 608 | /* Trace the changed parameter. */ |
7b8a54af TS |
609 | if (hw_is_mask(*v)) { |
610 | trace_hw_mask_param(pcm, *v, 0, &old_mask, | |
611 | hw_param_mask(params, *v)); | |
612 | } | |
613 | if (hw_is_interval(*v)) { | |
614 | trace_hw_interval_param(pcm, *v, 0, &old_interval, | |
615 | hw_param_interval(params, *v)); | |
616 | } | |
60f96aae | 617 | } |
7b8a54af | 618 | |
60f96aae TS |
619 | return 0; |
620 | } | |
621 | ||
877211f5 TI |
622 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
623 | struct snd_pcm_hw_params *params) | |
1da177e4 | 624 | { |
877211f5 | 625 | struct snd_pcm_runtime *runtime; |
9442e691 | 626 | int err, usecs; |
1da177e4 LT |
627 | unsigned int bits; |
628 | snd_pcm_uframes_t frames; | |
629 | ||
7eaa943c TI |
630 | if (PCM_RUNTIME_CHECK(substream)) |
631 | return -ENXIO; | |
1da177e4 | 632 | runtime = substream->runtime; |
1da177e4 LT |
633 | snd_pcm_stream_lock_irq(substream); |
634 | switch (runtime->status->state) { | |
635 | case SNDRV_PCM_STATE_OPEN: | |
636 | case SNDRV_PCM_STATE_SETUP: | |
637 | case SNDRV_PCM_STATE_PREPARED: | |
638 | break; | |
639 | default: | |
640 | snd_pcm_stream_unlock_irq(substream); | |
641 | return -EBADFD; | |
642 | } | |
643 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 644 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
645 | if (!substream->oss.oss) |
646 | #endif | |
9c323fcb | 647 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
648 | return -EBADFD; |
649 | ||
650 | params->rmask = ~0U; | |
651 | err = snd_pcm_hw_refine(substream, params); | |
652 | if (err < 0) | |
653 | goto _error; | |
654 | ||
655 | err = snd_pcm_hw_params_choose(substream, params); | |
656 | if (err < 0) | |
657 | goto _error; | |
658 | ||
f9a076bf TS |
659 | err = fixup_unreferenced_params(substream, params); |
660 | if (err < 0) | |
661 | goto _error; | |
662 | ||
1da177e4 LT |
663 | if (substream->ops->hw_params != NULL) { |
664 | err = substream->ops->hw_params(substream, params); | |
665 | if (err < 0) | |
666 | goto _error; | |
667 | } | |
668 | ||
669 | runtime->access = params_access(params); | |
670 | runtime->format = params_format(params); | |
671 | runtime->subformat = params_subformat(params); | |
672 | runtime->channels = params_channels(params); | |
673 | runtime->rate = params_rate(params); | |
674 | runtime->period_size = params_period_size(params); | |
675 | runtime->periods = params_periods(params); | |
676 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
677 | runtime->info = params->info; |
678 | runtime->rate_num = params->rate_num; | |
679 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
680 | runtime->no_period_wakeup = |
681 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
682 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
683 | |
684 | bits = snd_pcm_format_physical_width(runtime->format); | |
685 | runtime->sample_bits = bits; | |
686 | bits *= runtime->channels; | |
687 | runtime->frame_bits = bits; | |
688 | frames = 1; | |
689 | while (bits % 8 != 0) { | |
690 | bits *= 2; | |
691 | frames *= 2; | |
692 | } | |
693 | runtime->byte_align = bits / 8; | |
694 | runtime->min_align = frames; | |
695 | ||
696 | /* Default sw params */ | |
697 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
698 | runtime->period_step = 1; | |
1da177e4 | 699 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
700 | runtime->start_threshold = 1; |
701 | runtime->stop_threshold = runtime->buffer_size; | |
702 | runtime->silence_threshold = 0; | |
703 | runtime->silence_size = 0; | |
ead4046b CL |
704 | runtime->boundary = runtime->buffer_size; |
705 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
706 | runtime->boundary *= 2; | |
1da177e4 LT |
707 | |
708 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 709 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 710 | |
82f68251 JB |
711 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
712 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 713 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
714 | pm_qos_add_request(&substream->latency_pm_qos_req, |
715 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
716 | return 0; |
717 | _error: | |
25985edc | 718 | /* hardware might be unusable from this time, |
1da177e4 LT |
719 | so we force application to retry to set |
720 | the correct hardware parameter settings */ | |
9b0573c0 | 721 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
722 | if (substream->ops->hw_free != NULL) |
723 | substream->ops->hw_free(substream); | |
724 | return err; | |
725 | } | |
726 | ||
877211f5 TI |
727 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
728 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 729 | { |
877211f5 | 730 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
731 | int err; |
732 | ||
ef44a1ec LZ |
733 | params = memdup_user(_params, sizeof(*params)); |
734 | if (IS_ERR(params)) | |
735 | return PTR_ERR(params); | |
736 | ||
1da177e4 | 737 | err = snd_pcm_hw_params(substream, params); |
f74ae15f TS |
738 | if (err < 0) |
739 | goto end; | |
ef44a1ec | 740 | |
f74ae15f TS |
741 | if (copy_to_user(_params, params, sizeof(*params))) |
742 | err = -EFAULT; | |
743 | end: | |
1da177e4 LT |
744 | kfree(params); |
745 | return err; | |
746 | } | |
747 | ||
877211f5 | 748 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 749 | { |
877211f5 | 750 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
751 | int result = 0; |
752 | ||
7eaa943c TI |
753 | if (PCM_RUNTIME_CHECK(substream)) |
754 | return -ENXIO; | |
1da177e4 | 755 | runtime = substream->runtime; |
1da177e4 LT |
756 | snd_pcm_stream_lock_irq(substream); |
757 | switch (runtime->status->state) { | |
758 | case SNDRV_PCM_STATE_SETUP: | |
759 | case SNDRV_PCM_STATE_PREPARED: | |
760 | break; | |
761 | default: | |
762 | snd_pcm_stream_unlock_irq(substream); | |
763 | return -EBADFD; | |
764 | } | |
765 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 766 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
767 | return -EBADFD; |
768 | if (substream->ops->hw_free) | |
769 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 770 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 771 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
772 | return result; |
773 | } | |
774 | ||
877211f5 TI |
775 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
776 | struct snd_pcm_sw_params *params) | |
1da177e4 | 777 | { |
877211f5 | 778 | struct snd_pcm_runtime *runtime; |
1250932e | 779 | int err; |
1da177e4 | 780 | |
7eaa943c TI |
781 | if (PCM_RUNTIME_CHECK(substream)) |
782 | return -ENXIO; | |
1da177e4 | 783 | runtime = substream->runtime; |
1da177e4 LT |
784 | snd_pcm_stream_lock_irq(substream); |
785 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
786 | snd_pcm_stream_unlock_irq(substream); | |
787 | return -EBADFD; | |
788 | } | |
789 | snd_pcm_stream_unlock_irq(substream); | |
790 | ||
145d92e7 DC |
791 | if (params->tstamp_mode < 0 || |
792 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 793 | return -EINVAL; |
58900810 TI |
794 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
795 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 796 | return -EINVAL; |
1da177e4 LT |
797 | if (params->avail_min == 0) |
798 | return -EINVAL; | |
1da177e4 LT |
799 | if (params->silence_size >= runtime->boundary) { |
800 | if (params->silence_threshold != 0) | |
801 | return -EINVAL; | |
802 | } else { | |
803 | if (params->silence_size > params->silence_threshold) | |
804 | return -EINVAL; | |
805 | if (params->silence_threshold > runtime->buffer_size) | |
806 | return -EINVAL; | |
807 | } | |
1250932e | 808 | err = 0; |
1da177e4 LT |
809 | snd_pcm_stream_lock_irq(substream); |
810 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
811 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
812 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
813 | runtime->period_step = params->period_step; |
814 | runtime->control->avail_min = params->avail_min; | |
815 | runtime->start_threshold = params->start_threshold; | |
816 | runtime->stop_threshold = params->stop_threshold; | |
817 | runtime->silence_threshold = params->silence_threshold; | |
818 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
819 | params->boundary = runtime->boundary; |
820 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
821 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
822 | runtime->silence_size > 0) | |
823 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 824 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
825 | } |
826 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 827 | return err; |
1da177e4 LT |
828 | } |
829 | ||
877211f5 TI |
830 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
831 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 832 | { |
877211f5 | 833 | struct snd_pcm_sw_params params; |
1da177e4 LT |
834 | int err; |
835 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
836 | return -EFAULT; | |
837 | err = snd_pcm_sw_params(substream, ¶ms); | |
838 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
839 | return -EFAULT; | |
840 | return err; | |
841 | } | |
842 | ||
c99c5a3b TI |
843 | static inline snd_pcm_uframes_t |
844 | snd_pcm_calc_delay(struct snd_pcm_substream *substream) | |
845 | { | |
846 | snd_pcm_uframes_t delay; | |
847 | ||
848 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
849 | delay = snd_pcm_playback_hw_avail(substream->runtime); | |
850 | else | |
851 | delay = snd_pcm_capture_avail(substream->runtime); | |
852 | return delay + substream->runtime->delay; | |
853 | } | |
854 | ||
877211f5 TI |
855 | int snd_pcm_status(struct snd_pcm_substream *substream, |
856 | struct snd_pcm_status *status) | |
1da177e4 | 857 | { |
877211f5 | 858 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
859 | |
860 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
861 | |
862 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
863 | &runtime->audio_tstamp_config); | |
864 | ||
865 | /* backwards compatible behavior */ | |
866 | if (runtime->audio_tstamp_config.type_requested == | |
867 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
868 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
869 | runtime->audio_tstamp_config.type_requested = | |
870 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
871 | else | |
872 | runtime->audio_tstamp_config.type_requested = | |
873 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
874 | runtime->audio_tstamp_report.valid = 0; | |
875 | } else | |
876 | runtime->audio_tstamp_report.valid = 1; | |
877 | ||
1da177e4 LT |
878 | status->state = runtime->status->state; |
879 | status->suspended_state = runtime->status->suspended_state; | |
880 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
881 | goto _end; | |
882 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 883 | if (snd_pcm_running(substream)) { |
1da177e4 | 884 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
885 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
886 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 887 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
888 | status->audio_tstamp = |
889 | runtime->status->audio_tstamp; | |
3179f620 PLB |
890 | if (runtime->audio_tstamp_report.valid == 1) |
891 | /* backwards compatibility, no report provided in COMPAT mode */ | |
892 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
893 | &status->audio_tstamp_accuracy, | |
894 | &runtime->audio_tstamp_report); | |
895 | ||
8c121586 JK |
896 | goto _tstamp_end; |
897 | } | |
0d59b814 PLB |
898 | } else { |
899 | /* get tstamp only in fallback mode and only if enabled */ | |
900 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
901 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 902 | } |
8c121586 | 903 | _tstamp_end: |
1da177e4 LT |
904 | status->appl_ptr = runtime->control->appl_ptr; |
905 | status->hw_ptr = runtime->status->hw_ptr; | |
763e5067 | 906 | status->avail = snd_pcm_avail(substream); |
c99c5a3b TI |
907 | status->delay = snd_pcm_running(substream) ? |
908 | snd_pcm_calc_delay(substream) : 0; | |
1da177e4 LT |
909 | status->avail_max = runtime->avail_max; |
910 | status->overrange = runtime->overrange; | |
911 | runtime->avail_max = 0; | |
912 | runtime->overrange = 0; | |
913 | _end: | |
914 | snd_pcm_stream_unlock_irq(substream); | |
915 | return 0; | |
916 | } | |
917 | ||
877211f5 | 918 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
919 | struct snd_pcm_status __user * _status, |
920 | bool ext) | |
1da177e4 | 921 | { |
877211f5 | 922 | struct snd_pcm_status status; |
1da177e4 | 923 | int res; |
38ca2a4d | 924 | |
1da177e4 | 925 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
926 | /* |
927 | * with extension, parameters are read/write, | |
928 | * get audio_tstamp_data from user, | |
929 | * ignore rest of status structure | |
930 | */ | |
931 | if (ext && get_user(status.audio_tstamp_data, | |
932 | (u32 __user *)(&_status->audio_tstamp_data))) | |
933 | return -EFAULT; | |
1da177e4 LT |
934 | res = snd_pcm_status(substream, &status); |
935 | if (res < 0) | |
936 | return res; | |
937 | if (copy_to_user(_status, &status, sizeof(status))) | |
938 | return -EFAULT; | |
939 | return 0; | |
940 | } | |
941 | ||
877211f5 TI |
942 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
943 | struct snd_pcm_channel_info * info) | |
1da177e4 | 944 | { |
877211f5 | 945 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
946 | unsigned int channel; |
947 | ||
1da177e4 LT |
948 | channel = info->channel; |
949 | runtime = substream->runtime; | |
950 | snd_pcm_stream_lock_irq(substream); | |
951 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
952 | snd_pcm_stream_unlock_irq(substream); | |
953 | return -EBADFD; | |
954 | } | |
955 | snd_pcm_stream_unlock_irq(substream); | |
956 | if (channel >= runtime->channels) | |
957 | return -EINVAL; | |
958 | memset(info, 0, sizeof(*info)); | |
959 | info->channel = channel; | |
960 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
961 | } | |
962 | ||
877211f5 TI |
963 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
964 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 965 | { |
877211f5 | 966 | struct snd_pcm_channel_info info; |
1da177e4 LT |
967 | int res; |
968 | ||
969 | if (copy_from_user(&info, _info, sizeof(info))) | |
970 | return -EFAULT; | |
971 | res = snd_pcm_channel_info(substream, &info); | |
972 | if (res < 0) | |
973 | return res; | |
974 | if (copy_to_user(_info, &info, sizeof(info))) | |
975 | return -EFAULT; | |
976 | return 0; | |
977 | } | |
978 | ||
877211f5 | 979 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 980 | { |
877211f5 | 981 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
982 | if (runtime->trigger_master == NULL) |
983 | return; | |
984 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
985 | if (!runtime->trigger_tstamp_latched) |
986 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
987 | } else { |
988 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
989 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
990 | } | |
991 | runtime->trigger_master = NULL; | |
992 | } | |
993 | ||
994 | struct action_ops { | |
877211f5 TI |
995 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
996 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
997 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
998 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
999 | }; |
1000 | ||
1001 | /* | |
1002 | * this functions is core for handling of linked stream | |
1003 | * Note: the stream state might be changed also on failure | |
1004 | * Note2: call with calling stream lock + link lock | |
1005 | */ | |
b17154cf | 1006 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 1007 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1008 | int state, int do_lock) |
1009 | { | |
877211f5 TI |
1010 | struct snd_pcm_substream *s = NULL; |
1011 | struct snd_pcm_substream *s1; | |
dde1c652 | 1012 | int res = 0, depth = 1; |
1da177e4 | 1013 | |
ef991b95 | 1014 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
1015 | if (do_lock && s != substream) { |
1016 | if (s->pcm->nonatomic) | |
dde1c652 | 1017 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 1018 | else |
dde1c652 TI |
1019 | spin_lock_nested(&s->self_group.lock, depth); |
1020 | depth++; | |
257f8cce | 1021 | } |
1da177e4 LT |
1022 | res = ops->pre_action(s, state); |
1023 | if (res < 0) | |
1024 | goto _unlock; | |
1025 | } | |
ef991b95 | 1026 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
1027 | res = ops->do_action(s, state); |
1028 | if (res < 0) { | |
1029 | if (ops->undo_action) { | |
ef991b95 | 1030 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
1031 | if (s1 == s) /* failed stream */ |
1032 | break; | |
1033 | ops->undo_action(s1, state); | |
1034 | } | |
1035 | } | |
1036 | s = NULL; /* unlock all */ | |
1037 | goto _unlock; | |
1038 | } | |
1039 | } | |
ef991b95 | 1040 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
1041 | ops->post_action(s, state); |
1042 | } | |
1043 | _unlock: | |
1044 | if (do_lock) { | |
1045 | /* unlock streams */ | |
ef991b95 | 1046 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 1047 | if (s1 != substream) { |
811deede | 1048 | if (s1->pcm->nonatomic) |
257f8cce TI |
1049 | mutex_unlock(&s1->self_group.mutex); |
1050 | else | |
1051 | spin_unlock(&s1->self_group.lock); | |
1052 | } | |
1da177e4 LT |
1053 | if (s1 == s) /* end */ |
1054 | break; | |
1055 | } | |
1056 | } | |
1057 | return res; | |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Note: call with stream lock | |
1062 | */ | |
b17154cf | 1063 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 1064 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1065 | int state) |
1066 | { | |
1067 | int res; | |
1068 | ||
1069 | res = ops->pre_action(substream, state); | |
1070 | if (res < 0) | |
1071 | return res; | |
1072 | res = ops->do_action(substream, state); | |
1073 | if (res == 0) | |
1074 | ops->post_action(substream, state); | |
1075 | else if (ops->undo_action) | |
1076 | ops->undo_action(substream, state); | |
1077 | return res; | |
1078 | } | |
1079 | ||
a41c4cb9 TI |
1080 | static void snd_pcm_group_assign(struct snd_pcm_substream *substream, |
1081 | struct snd_pcm_group *new_group) | |
1082 | { | |
1083 | substream->group = new_group; | |
1084 | list_move(&substream->link_list, &new_group->substreams); | |
1085 | } | |
1086 | ||
f57f3df0 TI |
1087 | /* |
1088 | * Unref and unlock the group, but keep the stream lock; | |
1089 | * when the group becomes empty and no longer referred, destroy itself | |
1090 | */ | |
1091 | static void snd_pcm_group_unref(struct snd_pcm_group *group, | |
1092 | struct snd_pcm_substream *substream) | |
1093 | { | |
1094 | bool do_free; | |
1095 | ||
1096 | if (!group) | |
1097 | return; | |
0e279dce | 1098 | do_free = refcount_dec_and_test(&group->refs); |
f57f3df0 TI |
1099 | snd_pcm_group_unlock(group, substream->pcm->nonatomic); |
1100 | if (do_free) | |
1101 | kfree(group); | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Lock the group inside a stream lock and reference it; | |
1106 | * return the locked group object, or NULL if not linked | |
1107 | */ | |
1108 | static struct snd_pcm_group * | |
1109 | snd_pcm_stream_group_ref(struct snd_pcm_substream *substream) | |
1110 | { | |
1111 | bool nonatomic = substream->pcm->nonatomic; | |
1112 | struct snd_pcm_group *group; | |
1113 | bool trylock; | |
1114 | ||
1115 | for (;;) { | |
1116 | if (!snd_pcm_stream_linked(substream)) | |
1117 | return NULL; | |
1118 | group = substream->group; | |
1119 | /* block freeing the group object */ | |
1120 | refcount_inc(&group->refs); | |
1121 | ||
1122 | trylock = nonatomic ? mutex_trylock(&group->mutex) : | |
1123 | spin_trylock(&group->lock); | |
1124 | if (trylock) | |
1125 | break; /* OK */ | |
1126 | ||
1127 | /* re-lock for avoiding ABBA deadlock */ | |
1128 | snd_pcm_stream_unlock(substream); | |
1129 | snd_pcm_group_lock(group, nonatomic); | |
1130 | snd_pcm_stream_lock(substream); | |
1131 | ||
1132 | /* check the group again; the above opens a small race window */ | |
1133 | if (substream->group == group) | |
1134 | break; /* OK */ | |
1135 | /* group changed, try again */ | |
1136 | snd_pcm_group_unref(group, substream); | |
1137 | } | |
1138 | return group; | |
1139 | } | |
1140 | ||
aa8edd8c TI |
1141 | /* |
1142 | * Note: call with stream lock | |
1143 | */ | |
b17154cf | 1144 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
1145 | struct snd_pcm_substream *substream, |
1146 | int state) | |
257f8cce | 1147 | { |
f57f3df0 | 1148 | struct snd_pcm_group *group; |
257f8cce TI |
1149 | int res; |
1150 | ||
f57f3df0 TI |
1151 | group = snd_pcm_stream_group_ref(substream); |
1152 | if (group) | |
257f8cce | 1153 | res = snd_pcm_action_group(ops, substream, state, 1); |
f57f3df0 TI |
1154 | else |
1155 | res = snd_pcm_action_single(ops, substream, state); | |
1156 | snd_pcm_group_unref(group, substream); | |
1da177e4 LT |
1157 | return res; |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * Note: don't use any locks before | |
1162 | */ | |
b17154cf | 1163 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 1164 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1165 | int state) |
1166 | { | |
1167 | int res; | |
1168 | ||
e3a4bd5e TI |
1169 | snd_pcm_stream_lock_irq(substream); |
1170 | res = snd_pcm_action(ops, substream, state); | |
1171 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1172 | return res; |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | */ | |
b17154cf | 1177 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1178 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1179 | int state) |
1180 | { | |
1181 | int res; | |
1182 | ||
f57f3df0 | 1183 | /* Guarantee the group members won't change during non-atomic action */ |
1da177e4 LT |
1184 | down_read(&snd_pcm_link_rwsem); |
1185 | if (snd_pcm_stream_linked(substream)) | |
1186 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1187 | else | |
1188 | res = snd_pcm_action_single(ops, substream, state); | |
1189 | up_read(&snd_pcm_link_rwsem); | |
1190 | return res; | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * start callbacks | |
1195 | */ | |
877211f5 | 1196 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1197 | { |
877211f5 | 1198 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1199 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1200 | return -EBADFD; | |
1201 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1202 | !snd_pcm_playback_data(substream)) | |
1203 | return -EPIPE; | |
2b79d7a6 | 1204 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1205 | runtime->trigger_master = substream; |
1206 | return 0; | |
1207 | } | |
1208 | ||
877211f5 | 1209 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1210 | { |
1211 | if (substream->runtime->trigger_master != substream) | |
1212 | return 0; | |
1213 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1214 | } | |
1215 | ||
877211f5 | 1216 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1217 | { |
1218 | if (substream->runtime->trigger_master == substream) | |
1219 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1220 | } | |
1221 | ||
877211f5 | 1222 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1223 | { |
877211f5 | 1224 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1225 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1226 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1227 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1228 | runtime->rate; | |
1da177e4 LT |
1229 | runtime->status->state = state; |
1230 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1231 | runtime->silence_size > 0) | |
1232 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1233 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1234 | } |
1235 | ||
b17154cf | 1236 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1237 | .pre_action = snd_pcm_pre_start, |
1238 | .do_action = snd_pcm_do_start, | |
1239 | .undo_action = snd_pcm_undo_start, | |
1240 | .post_action = snd_pcm_post_start | |
1241 | }; | |
1242 | ||
1243 | /** | |
1c85cc64 | 1244 | * snd_pcm_start - start all linked streams |
df8db936 | 1245 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1246 | * |
1247 | * Return: Zero if successful, or a negative error code. | |
c2c86a97 | 1248 | * The stream lock must be acquired before calling this function. |
1da177e4 | 1249 | */ |
877211f5 | 1250 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1251 | { |
877211f5 TI |
1252 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1253 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1254 | } |
1255 | ||
c2c86a97 TI |
1256 | /* take the stream lock and start the streams */ |
1257 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) | |
1258 | { | |
1259 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, | |
1260 | SNDRV_PCM_STATE_RUNNING); | |
1261 | } | |
1262 | ||
1da177e4 LT |
1263 | /* |
1264 | * stop callbacks | |
1265 | */ | |
877211f5 | 1266 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1267 | { |
877211f5 | 1268 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1269 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1270 | return -EBADFD; | |
1271 | runtime->trigger_master = substream; | |
1272 | return 0; | |
1273 | } | |
1274 | ||
877211f5 | 1275 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1276 | { |
1277 | if (substream->runtime->trigger_master == substream && | |
1278 | snd_pcm_running(substream)) | |
1279 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1280 | return 0; /* unconditonally stop all substreams */ | |
1281 | } | |
1282 | ||
877211f5 | 1283 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1284 | { |
877211f5 | 1285 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1286 | if (runtime->status->state != state) { |
1287 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1288 | runtime->status->state = state; |
90bbaf66 | 1289 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1290 | } |
1291 | wake_up(&runtime->sleep); | |
c91a988d | 1292 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1293 | } |
1294 | ||
b17154cf | 1295 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1296 | .pre_action = snd_pcm_pre_stop, |
1297 | .do_action = snd_pcm_do_stop, | |
1298 | .post_action = snd_pcm_post_stop | |
1299 | }; | |
1300 | ||
1301 | /** | |
1c85cc64 | 1302 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1303 | * @substream: the PCM substream instance |
1304 | * @state: PCM state after stopping the stream | |
1da177e4 | 1305 | * |
1c85cc64 | 1306 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1307 | * |
0a11458c | 1308 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1309 | */ |
fea952e5 | 1310 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1311 | { |
1312 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1313 | } | |
e88e8ae6 TI |
1314 | EXPORT_SYMBOL(snd_pcm_stop); |
1315 | ||
1da177e4 | 1316 | /** |
1c85cc64 | 1317 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1318 | * @substream: the PCM substream |
1da177e4 | 1319 | * |
1c85cc64 | 1320 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1321 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1322 | * |
1323 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1324 | */ |
877211f5 | 1325 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1326 | { |
877211f5 TI |
1327 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1328 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1329 | } |
1330 | ||
1fb8510c TI |
1331 | /** |
1332 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1333 | * @substream: the PCM substream instance | |
1fb8510c TI |
1334 | * |
1335 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1336 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1337 | * | |
1338 | * Return: Zero if successful, or a negative error code. | |
1339 | */ | |
1340 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1341 | { | |
1342 | unsigned long flags; | |
1fb8510c TI |
1343 | |
1344 | snd_pcm_stream_lock_irqsave(substream, flags); | |
e647f5a5 | 1345 | if (substream->runtime && snd_pcm_running(substream)) |
9cd641ed | 1346 | __snd_pcm_xrun(substream); |
1fb8510c | 1347 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
9cd641ed | 1348 | return 0; |
1fb8510c TI |
1349 | } |
1350 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1351 | ||
1da177e4 LT |
1352 | /* |
1353 | * pause callbacks | |
1354 | */ | |
877211f5 | 1355 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1356 | { |
877211f5 | 1357 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1358 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1359 | return -ENOSYS; | |
1360 | if (push) { | |
1361 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1362 | return -EBADFD; | |
1363 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1364 | return -EBADFD; | |
1365 | runtime->trigger_master = substream; | |
1366 | return 0; | |
1367 | } | |
1368 | ||
877211f5 | 1369 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1370 | { |
1371 | if (substream->runtime->trigger_master != substream) | |
1372 | return 0; | |
56385a12 JK |
1373 | /* some drivers might use hw_ptr to recover from the pause - |
1374 | update the hw_ptr now */ | |
1375 | if (push) | |
1376 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1377 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1378 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1379 | * delta, effectively to skip the check once. |
1380 | */ | |
1381 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1382 | return substream->ops->trigger(substream, |
1383 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1384 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1385 | } | |
1386 | ||
877211f5 | 1387 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1388 | { |
1389 | if (substream->runtime->trigger_master == substream) | |
1390 | substream->ops->trigger(substream, | |
1391 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1392 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1393 | } | |
1394 | ||
877211f5 | 1395 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1396 | { |
877211f5 | 1397 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1398 | snd_pcm_trigger_tstamp(substream); |
1399 | if (push) { | |
1400 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1401 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1402 | wake_up(&runtime->sleep); |
c91a988d | 1403 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1404 | } else { |
1405 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1406 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1407 | } |
1408 | } | |
1409 | ||
b17154cf | 1410 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1411 | .pre_action = snd_pcm_pre_pause, |
1412 | .do_action = snd_pcm_do_pause, | |
1413 | .undo_action = snd_pcm_undo_pause, | |
1414 | .post_action = snd_pcm_post_pause | |
1415 | }; | |
1416 | ||
1417 | /* | |
1418 | * Push/release the pause for all linked streams. | |
1419 | */ | |
877211f5 | 1420 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1421 | { |
1422 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1423 | } | |
1424 | ||
1425 | #ifdef CONFIG_PM | |
1426 | /* suspend */ | |
1427 | ||
877211f5 | 1428 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1429 | { |
877211f5 | 1430 | struct snd_pcm_runtime *runtime = substream->runtime; |
113ce081 TI |
1431 | switch (runtime->status->state) { |
1432 | case SNDRV_PCM_STATE_SUSPENDED: | |
1da177e4 | 1433 | return -EBUSY; |
113ce081 TI |
1434 | /* unresumable PCM state; return -EBUSY for skipping suspend */ |
1435 | case SNDRV_PCM_STATE_OPEN: | |
1436 | case SNDRV_PCM_STATE_SETUP: | |
1437 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1438 | return -EBUSY; | |
1439 | } | |
1da177e4 LT |
1440 | runtime->trigger_master = substream; |
1441 | return 0; | |
1442 | } | |
1443 | ||
877211f5 | 1444 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1445 | { |
877211f5 | 1446 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1447 | if (runtime->trigger_master != substream) |
1448 | return 0; | |
1449 | if (! snd_pcm_running(substream)) | |
1450 | return 0; | |
1451 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1452 | return 0; /* suspend unconditionally */ | |
1453 | } | |
1454 | ||
877211f5 | 1455 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1456 | { |
877211f5 | 1457 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1458 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1459 | runtime->status->suspended_state = runtime->status->state; |
1460 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1461 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1462 | wake_up(&runtime->sleep); |
c91a988d | 1463 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1464 | } |
1465 | ||
b17154cf | 1466 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1467 | .pre_action = snd_pcm_pre_suspend, |
1468 | .do_action = snd_pcm_do_suspend, | |
1469 | .post_action = snd_pcm_post_suspend | |
1470 | }; | |
1471 | ||
ce7f93e2 | 1472 | /* |
1c85cc64 | 1473 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1474 | * @substream: the PCM substream |
1da177e4 | 1475 | * |
1da177e4 | 1476 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 | 1477 | * |
ce7f93e2 | 1478 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1479 | */ |
ce7f93e2 | 1480 | static int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1481 | { |
1482 | int err; | |
1483 | unsigned long flags; | |
1484 | ||
1485 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1486 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1487 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1488 | return err; | |
1489 | } | |
e88e8ae6 | 1490 | |
1da177e4 | 1491 | /** |
1c85cc64 | 1492 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1493 | * @pcm: the PCM instance |
1da177e4 | 1494 | * |
1da177e4 | 1495 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1496 | * |
1497 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1498 | */ |
877211f5 | 1499 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1500 | { |
877211f5 | 1501 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1502 | int stream, err = 0; |
1503 | ||
603bf524 TI |
1504 | if (! pcm) |
1505 | return 0; | |
1506 | ||
1da177e4 | 1507 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1508 | for (substream = pcm->streams[stream].substream; |
1509 | substream; substream = substream->next) { | |
1da177e4 LT |
1510 | /* FIXME: the open/close code should lock this as well */ |
1511 | if (substream->runtime == NULL) | |
1512 | continue; | |
d9c0b2af RS |
1513 | |
1514 | /* | |
1515 | * Skip BE dai link PCM's that are internal and may | |
1516 | * not have their substream ops set. | |
1517 | */ | |
1518 | if (!substream->ops) | |
1519 | continue; | |
1520 | ||
1da177e4 LT |
1521 | err = snd_pcm_suspend(substream); |
1522 | if (err < 0 && err != -EBUSY) | |
1523 | return err; | |
1524 | } | |
1525 | } | |
1526 | return 0; | |
1527 | } | |
e88e8ae6 TI |
1528 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1529 | ||
1da177e4 LT |
1530 | /* resume */ |
1531 | ||
877211f5 | 1532 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1533 | { |
877211f5 | 1534 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1535 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1536 | return -ENOSYS; | |
1537 | runtime->trigger_master = substream; | |
1538 | return 0; | |
1539 | } | |
1540 | ||
877211f5 | 1541 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1542 | { |
877211f5 | 1543 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1544 | if (runtime->trigger_master != substream) |
1545 | return 0; | |
1546 | /* DMA not running previously? */ | |
1547 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1548 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1549 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1550 | return 0; | |
1551 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1552 | } | |
1553 | ||
877211f5 | 1554 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1555 | { |
1556 | if (substream->runtime->trigger_master == substream && | |
1557 | snd_pcm_running(substream)) | |
1558 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1559 | } | |
1560 | ||
877211f5 | 1561 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1562 | { |
877211f5 | 1563 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1564 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1565 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1566 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1567 | } |
1568 | ||
b17154cf | 1569 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1570 | .pre_action = snd_pcm_pre_resume, |
1571 | .do_action = snd_pcm_do_resume, | |
1572 | .undo_action = snd_pcm_undo_resume, | |
1573 | .post_action = snd_pcm_post_resume | |
1574 | }; | |
1575 | ||
877211f5 | 1576 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1577 | { |
68b4acd3 | 1578 | return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | #else | |
1582 | ||
877211f5 | 1583 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1584 | { |
1585 | return -ENOSYS; | |
1586 | } | |
1587 | ||
1588 | #endif /* CONFIG_PM */ | |
1589 | ||
1590 | /* | |
1591 | * xrun ioctl | |
1592 | * | |
1593 | * Change the RUNNING stream(s) to XRUN state. | |
1594 | */ | |
877211f5 | 1595 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1596 | { |
877211f5 | 1597 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1598 | int result; |
1599 | ||
1da177e4 LT |
1600 | snd_pcm_stream_lock_irq(substream); |
1601 | switch (runtime->status->state) { | |
1602 | case SNDRV_PCM_STATE_XRUN: | |
1603 | result = 0; /* already there */ | |
1604 | break; | |
1605 | case SNDRV_PCM_STATE_RUNNING: | |
9cd641ed TI |
1606 | __snd_pcm_xrun(substream); |
1607 | result = 0; | |
1da177e4 LT |
1608 | break; |
1609 | default: | |
1610 | result = -EBADFD; | |
1611 | } | |
1612 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1613 | return result; |
1614 | } | |
1615 | ||
1616 | /* | |
1617 | * reset ioctl | |
1618 | */ | |
877211f5 | 1619 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1620 | { |
877211f5 | 1621 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1622 | switch (runtime->status->state) { |
1623 | case SNDRV_PCM_STATE_RUNNING: | |
1624 | case SNDRV_PCM_STATE_PREPARED: | |
1625 | case SNDRV_PCM_STATE_PAUSED: | |
1626 | case SNDRV_PCM_STATE_SUSPENDED: | |
1627 | return 0; | |
1628 | default: | |
1629 | return -EBADFD; | |
1630 | } | |
1631 | } | |
1632 | ||
877211f5 | 1633 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1634 | { |
877211f5 | 1635 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1636 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1637 | if (err < 0) | |
1638 | return err; | |
1da177e4 | 1639 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1640 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1641 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1642 | runtime->silence_start = runtime->status->hw_ptr; |
1643 | runtime->silence_filled = 0; | |
1644 | return 0; | |
1645 | } | |
1646 | ||
877211f5 | 1647 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1648 | { |
877211f5 | 1649 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1650 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1651 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1652 | runtime->silence_size > 0) | |
1653 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1654 | } | |
1655 | ||
b17154cf | 1656 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1657 | .pre_action = snd_pcm_pre_reset, |
1658 | .do_action = snd_pcm_do_reset, | |
1659 | .post_action = snd_pcm_post_reset | |
1660 | }; | |
1661 | ||
877211f5 | 1662 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1663 | { |
1664 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1665 | } | |
1666 | ||
1667 | /* | |
1668 | * prepare ioctl | |
1669 | */ | |
0df63e44 TI |
1670 | /* we use the second argument for updating f_flags */ |
1671 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1672 | int f_flags) | |
1da177e4 | 1673 | { |
877211f5 | 1674 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1675 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1676 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1677 | return -EBADFD; |
1678 | if (snd_pcm_running(substream)) | |
1679 | return -EBUSY; | |
0df63e44 | 1680 | substream->f_flags = f_flags; |
1da177e4 LT |
1681 | return 0; |
1682 | } | |
1683 | ||
877211f5 | 1684 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1685 | { |
1686 | int err; | |
1687 | err = substream->ops->prepare(substream); | |
1688 | if (err < 0) | |
1689 | return err; | |
1690 | return snd_pcm_do_reset(substream, 0); | |
1691 | } | |
1692 | ||
877211f5 | 1693 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1694 | { |
877211f5 | 1695 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1696 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1697 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1698 | } |
1699 | ||
b17154cf | 1700 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1701 | .pre_action = snd_pcm_pre_prepare, |
1702 | .do_action = snd_pcm_do_prepare, | |
1703 | .post_action = snd_pcm_post_prepare | |
1704 | }; | |
1705 | ||
1706 | /** | |
1c85cc64 | 1707 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1708 | * @substream: the PCM substream instance |
0df63e44 | 1709 | * @file: file to refer f_flags |
eb7c06e8 YB |
1710 | * |
1711 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1712 | */ |
0df63e44 TI |
1713 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1714 | struct file *file) | |
1da177e4 | 1715 | { |
0df63e44 TI |
1716 | int f_flags; |
1717 | ||
1718 | if (file) | |
1719 | f_flags = file->f_flags; | |
1720 | else | |
1721 | f_flags = substream->f_flags; | |
1da177e4 | 1722 | |
1b745cd9 TI |
1723 | snd_pcm_stream_lock_irq(substream); |
1724 | switch (substream->runtime->status->state) { | |
1725 | case SNDRV_PCM_STATE_PAUSED: | |
1726 | snd_pcm_pause(substream, 0); | |
1727 | /* fallthru */ | |
1728 | case SNDRV_PCM_STATE_SUSPENDED: | |
1729 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1730 | break; | |
1731 | } | |
1732 | snd_pcm_stream_unlock_irq(substream); | |
1733 | ||
68b4acd3 TI |
1734 | return snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1735 | substream, f_flags); | |
1da177e4 LT |
1736 | } |
1737 | ||
1738 | /* | |
1739 | * drain ioctl | |
1740 | */ | |
1741 | ||
877211f5 | 1742 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1743 | { |
4f7c39dc TI |
1744 | struct snd_pcm_runtime *runtime = substream->runtime; |
1745 | switch (runtime->status->state) { | |
1746 | case SNDRV_PCM_STATE_OPEN: | |
1747 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1748 | case SNDRV_PCM_STATE_SUSPENDED: | |
1749 | return -EBADFD; | |
1750 | } | |
1751 | runtime->trigger_master = substream; | |
1da177e4 LT |
1752 | return 0; |
1753 | } | |
1754 | ||
877211f5 | 1755 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1756 | { |
877211f5 | 1757 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1758 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1759 | switch (runtime->status->state) { | |
1760 | case SNDRV_PCM_STATE_PREPARED: | |
1761 | /* start playback stream if possible */ | |
1762 | if (! snd_pcm_playback_empty(substream)) { | |
1763 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1764 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1765 | } else { |
1766 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1767 | } |
1768 | break; | |
1769 | case SNDRV_PCM_STATE_RUNNING: | |
1770 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1771 | break; | |
4f7c39dc TI |
1772 | case SNDRV_PCM_STATE_XRUN: |
1773 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1774 | break; | |
1da177e4 LT |
1775 | default: |
1776 | break; | |
1777 | } | |
1778 | } else { | |
1779 | /* stop running stream */ | |
1780 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1781 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1782 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1783 | snd_pcm_do_stop(substream, new_state); |
1784 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1785 | } |
1786 | } | |
48d88297 LY |
1787 | |
1788 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1789 | runtime->trigger_master == substream && | |
1790 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1791 | return substream->ops->trigger(substream, | |
1792 | SNDRV_PCM_TRIGGER_DRAIN); | |
1793 | ||
1da177e4 LT |
1794 | return 0; |
1795 | } | |
1796 | ||
877211f5 | 1797 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1798 | { |
1799 | } | |
1800 | ||
b17154cf | 1801 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1802 | .pre_action = snd_pcm_pre_drain_init, |
1803 | .do_action = snd_pcm_do_drain_init, | |
1804 | .post_action = snd_pcm_post_drain_init | |
1805 | }; | |
1806 | ||
1da177e4 LT |
1807 | /* |
1808 | * Drain the stream(s). | |
1809 | * When the substream is linked, sync until the draining of all playback streams | |
1810 | * is finished. | |
1811 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1812 | * (capture only) state. | |
1813 | */ | |
4cdc115f TI |
1814 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1815 | struct file *file) | |
1da177e4 | 1816 | { |
877211f5 TI |
1817 | struct snd_card *card; |
1818 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1819 | struct snd_pcm_substream *s; |
f57f3df0 | 1820 | struct snd_pcm_group *group; |
ac6424b9 | 1821 | wait_queue_entry_t wait; |
1da177e4 | 1822 | int result = 0; |
4cdc115f | 1823 | int nonblock = 0; |
1da177e4 | 1824 | |
1da177e4 LT |
1825 | card = substream->pcm->card; |
1826 | runtime = substream->runtime; | |
1827 | ||
1828 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1829 | return -EBADFD; | |
1830 | ||
4cdc115f TI |
1831 | if (file) { |
1832 | if (file->f_flags & O_NONBLOCK) | |
1833 | nonblock = 1; | |
1834 | } else if (substream->f_flags & O_NONBLOCK) | |
1835 | nonblock = 1; | |
1836 | ||
21cb2a2e TI |
1837 | snd_pcm_stream_lock_irq(substream); |
1838 | /* resume pause */ | |
d3a7dcfe | 1839 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1840 | snd_pcm_pause(substream, 0); |
1841 | ||
1842 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1843 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1844 | if (result < 0) |
1845 | goto unlock; | |
1846 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1847 | if (nonblock) { | |
1848 | result = -EAGAIN; | |
1849 | goto unlock; | |
21cb2a2e | 1850 | } |
1da177e4 LT |
1851 | |
1852 | for (;;) { | |
1853 | long tout; | |
d3a7dcfe | 1854 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1855 | if (signal_pending(current)) { |
1856 | result = -ERESTARTSYS; | |
1857 | break; | |
1858 | } | |
d3a7dcfe TI |
1859 | /* find a substream to drain */ |
1860 | to_check = NULL; | |
f57f3df0 | 1861 | group = snd_pcm_stream_group_ref(substream); |
d3a7dcfe TI |
1862 | snd_pcm_group_for_each_entry(s, substream) { |
1863 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1864 | continue; | |
1865 | runtime = s->runtime; | |
1866 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1867 | to_check = runtime; | |
21cb2a2e | 1868 | break; |
d3a7dcfe | 1869 | } |
21cb2a2e | 1870 | } |
f57f3df0 | 1871 | snd_pcm_group_unref(group, substream); |
d3a7dcfe TI |
1872 | if (!to_check) |
1873 | break; /* all drained */ | |
1874 | init_waitqueue_entry(&wait, current); | |
37151a41 | 1875 | set_current_state(TASK_INTERRUPTIBLE); |
d3a7dcfe | 1876 | add_wait_queue(&to_check->sleep, &wait); |
1da177e4 | 1877 | snd_pcm_stream_unlock_irq(substream); |
f2b3614c TI |
1878 | if (runtime->no_period_wakeup) |
1879 | tout = MAX_SCHEDULE_TIMEOUT; | |
1880 | else { | |
1881 | tout = 10; | |
1882 | if (runtime->rate) { | |
1883 | long t = runtime->period_size * 2 / runtime->rate; | |
1884 | tout = max(t, tout); | |
1885 | } | |
1886 | tout = msecs_to_jiffies(tout * 1000); | |
1887 | } | |
37151a41 | 1888 | tout = schedule_timeout(tout); |
f57f3df0 | 1889 | |
1da177e4 | 1890 | snd_pcm_stream_lock_irq(substream); |
f57f3df0 TI |
1891 | group = snd_pcm_stream_group_ref(substream); |
1892 | snd_pcm_group_for_each_entry(s, substream) { | |
1893 | if (s->runtime == to_check) { | |
1894 | remove_wait_queue(&to_check->sleep, &wait); | |
1895 | break; | |
1896 | } | |
1897 | } | |
1898 | snd_pcm_group_unref(group, substream); | |
1899 | ||
0914f796 TI |
1900 | if (card->shutdown) { |
1901 | result = -ENODEV; | |
1902 | break; | |
1903 | } | |
1da177e4 LT |
1904 | if (tout == 0) { |
1905 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1906 | result = -ESTRPIPE; | |
1907 | else { | |
09e56df8 TI |
1908 | dev_dbg(substream->pcm->card->dev, |
1909 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1910 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1911 | result = -EIO; | |
1912 | } | |
1913 | break; | |
1914 | } | |
1da177e4 | 1915 | } |
21cb2a2e | 1916 | |
4cdc115f | 1917 | unlock: |
21cb2a2e | 1918 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
1919 | |
1920 | return result; | |
1921 | } | |
1922 | ||
1923 | /* | |
1924 | * drop ioctl | |
1925 | * | |
1926 | * Immediately put all linked substreams into SETUP state. | |
1927 | */ | |
877211f5 | 1928 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1929 | { |
877211f5 | 1930 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1931 | int result = 0; |
1932 | ||
7eaa943c TI |
1933 | if (PCM_RUNTIME_CHECK(substream)) |
1934 | return -ENXIO; | |
1da177e4 | 1935 | runtime = substream->runtime; |
1da177e4 | 1936 | |
de1b8b93 | 1937 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
4b95ff78 | 1938 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) |
1da177e4 LT |
1939 | return -EBADFD; |
1940 | ||
1da177e4 LT |
1941 | snd_pcm_stream_lock_irq(substream); |
1942 | /* resume pause */ | |
1943 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1944 | snd_pcm_pause(substream, 0); | |
1945 | ||
1946 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1947 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1948 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1949 | |
1da177e4 LT |
1950 | return result; |
1951 | } | |
1952 | ||
1953 | ||
0888c321 | 1954 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1955 | { |
0888c321 | 1956 | struct inode *inode = file_inode(file); |
d819fb21 | 1957 | struct snd_pcm *pcm; |
f87135f5 CL |
1958 | unsigned int minor; |
1959 | ||
0888c321 AV |
1960 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1961 | return false; | |
1da177e4 | 1962 | minor = iminor(inode); |
d819fb21 TI |
1963 | pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK); |
1964 | if (!pcm) | |
1965 | pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1966 | if (!pcm) | |
1967 | return false; | |
1968 | snd_card_unref(pcm->card); | |
1969 | return true; | |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | /* | |
1973 | * PCM link handling | |
1974 | */ | |
877211f5 | 1975 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1976 | { |
1977 | int res = 0; | |
877211f5 TI |
1978 | struct snd_pcm_file *pcm_file; |
1979 | struct snd_pcm_substream *substream1; | |
f57f3df0 TI |
1980 | struct snd_pcm_group *group, *target_group; |
1981 | bool nonatomic = substream->pcm->nonatomic; | |
0888c321 | 1982 | struct fd f = fdget(fd); |
1da177e4 | 1983 | |
0888c321 | 1984 | if (!f.file) |
1da177e4 | 1985 | return -EBADFD; |
0888c321 AV |
1986 | if (!is_pcm_file(f.file)) { |
1987 | res = -EBADFD; | |
1988 | goto _badf; | |
1989 | } | |
1990 | pcm_file = f.file->private_data; | |
1da177e4 | 1991 | substream1 = pcm_file->substream; |
73365cb1 | 1992 | group = kzalloc(sizeof(*group), GFP_KERNEL); |
1662591b TI |
1993 | if (!group) { |
1994 | res = -ENOMEM; | |
1995 | goto _nolock; | |
1996 | } | |
73365cb1 | 1997 | snd_pcm_group_init(group); |
f57f3df0 | 1998 | |
ecb41f0f | 1999 | down_write(&snd_pcm_link_rwsem); |
1da177e4 | 2000 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || |
257f8cce TI |
2001 | substream->runtime->status->state != substream1->runtime->status->state || |
2002 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
2003 | res = -EBADFD; |
2004 | goto _end; | |
2005 | } | |
2006 | if (snd_pcm_stream_linked(substream1)) { | |
2007 | res = -EALREADY; | |
2008 | goto _end; | |
2009 | } | |
f57f3df0 TI |
2010 | |
2011 | snd_pcm_stream_lock_irq(substream); | |
1da177e4 | 2012 | if (!snd_pcm_stream_linked(substream)) { |
a41c4cb9 | 2013 | snd_pcm_group_assign(substream, group); |
f57f3df0 | 2014 | group = NULL; /* assigned, don't free this one below */ |
1da177e4 | 2015 | } |
f57f3df0 TI |
2016 | target_group = substream->group; |
2017 | snd_pcm_stream_unlock_irq(substream); | |
2018 | ||
2019 | snd_pcm_group_lock_irq(target_group, nonatomic); | |
2020 | snd_pcm_stream_lock(substream1); | |
2021 | snd_pcm_group_assign(substream1, target_group); | |
0e279dce | 2022 | refcount_inc(&target_group->refs); |
f57f3df0 TI |
2023 | snd_pcm_stream_unlock(substream1); |
2024 | snd_pcm_group_unlock_irq(target_group, nonatomic); | |
1da177e4 | 2025 | _end: |
1da177e4 | 2026 | up_write(&snd_pcm_link_rwsem); |
1662591b | 2027 | _nolock: |
dd6c5cd8 | 2028 | kfree(group); |
0888c321 AV |
2029 | _badf: |
2030 | fdput(f); | |
1da177e4 LT |
2031 | return res; |
2032 | } | |
2033 | ||
877211f5 | 2034 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 | 2035 | { |
f57f3df0 | 2036 | snd_pcm_stream_lock(substream); |
a41c4cb9 | 2037 | snd_pcm_group_assign(substream, &substream->self_group); |
f57f3df0 | 2038 | snd_pcm_stream_unlock(substream); |
1da177e4 LT |
2039 | } |
2040 | ||
877211f5 | 2041 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 2042 | { |
a41c4cb9 | 2043 | struct snd_pcm_group *group; |
f57f3df0 TI |
2044 | bool nonatomic = substream->pcm->nonatomic; |
2045 | bool do_free = false; | |
1da177e4 LT |
2046 | int res = 0; |
2047 | ||
ecb41f0f | 2048 | down_write(&snd_pcm_link_rwsem); |
f57f3df0 | 2049 | |
1da177e4 LT |
2050 | if (!snd_pcm_stream_linked(substream)) { |
2051 | res = -EALREADY; | |
2052 | goto _end; | |
2053 | } | |
a41c4cb9 TI |
2054 | |
2055 | group = substream->group; | |
f57f3df0 | 2056 | snd_pcm_group_lock_irq(group, nonatomic); |
a41c4cb9 | 2057 | |
1da177e4 | 2058 | relink_to_local(substream); |
0e279dce | 2059 | refcount_dec(&group->refs); |
a41c4cb9 TI |
2060 | |
2061 | /* detach the last stream, too */ | |
2062 | if (list_is_singular(&group->substreams)) { | |
7df5a5f6 TI |
2063 | relink_to_local(list_first_entry(&group->substreams, |
2064 | struct snd_pcm_substream, | |
2065 | link_list)); | |
0e279dce | 2066 | do_free = refcount_dec_and_test(&group->refs); |
1da177e4 | 2067 | } |
a41c4cb9 | 2068 | |
f57f3df0 TI |
2069 | snd_pcm_group_unlock_irq(group, nonatomic); |
2070 | if (do_free) | |
2071 | kfree(group); | |
2072 | ||
1da177e4 | 2073 | _end: |
1da177e4 LT |
2074 | up_write(&snd_pcm_link_rwsem); |
2075 | return res; | |
2076 | } | |
2077 | ||
2078 | /* | |
2079 | * hw configurator | |
2080 | */ | |
877211f5 TI |
2081 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
2082 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2083 | { |
877211f5 | 2084 | struct snd_interval t; |
1da177e4 LT |
2085 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
2086 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2087 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2088 | } | |
2089 | ||
877211f5 TI |
2090 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
2091 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2092 | { |
877211f5 | 2093 | struct snd_interval t; |
1da177e4 LT |
2094 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
2095 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2096 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2097 | } | |
2098 | ||
877211f5 TI |
2099 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
2100 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2101 | { |
877211f5 | 2102 | struct snd_interval t; |
1da177e4 LT |
2103 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
2104 | hw_param_interval_c(params, rule->deps[1]), | |
2105 | (unsigned long) rule->private, &t); | |
2106 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2107 | } | |
2108 | ||
877211f5 TI |
2109 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
2110 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2111 | { |
877211f5 | 2112 | struct snd_interval t; |
1da177e4 LT |
2113 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
2114 | (unsigned long) rule->private, | |
2115 | hw_param_interval_c(params, rule->deps[1]), &t); | |
2116 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2117 | } | |
2118 | ||
877211f5 TI |
2119 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
2120 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
2121 | { |
2122 | unsigned int k; | |
b55f9fdc TS |
2123 | const struct snd_interval *i = |
2124 | hw_param_interval_c(params, rule->deps[0]); | |
877211f5 TI |
2125 | struct snd_mask m; |
2126 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
2127 | snd_mask_any(&m); |
2128 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2129 | int bits; | |
2130 | if (! snd_mask_test(mask, k)) | |
2131 | continue; | |
2132 | bits = snd_pcm_format_physical_width(k); | |
2133 | if (bits <= 0) | |
2134 | continue; /* ignore invalid formats */ | |
2135 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
2136 | snd_mask_reset(&m, k); | |
2137 | } | |
2138 | return snd_mask_refine(mask, &m); | |
2139 | } | |
2140 | ||
877211f5 TI |
2141 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
2142 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2143 | { |
877211f5 | 2144 | struct snd_interval t; |
1da177e4 LT |
2145 | unsigned int k; |
2146 | t.min = UINT_MAX; | |
2147 | t.max = 0; | |
2148 | t.openmin = 0; | |
2149 | t.openmax = 0; | |
2150 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
2151 | int bits; | |
2152 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
2153 | continue; | |
2154 | bits = snd_pcm_format_physical_width(k); | |
2155 | if (bits <= 0) | |
2156 | continue; /* ignore invalid formats */ | |
2157 | if (t.min > (unsigned)bits) | |
2158 | t.min = bits; | |
2159 | if (t.max < (unsigned)bits) | |
2160 | t.max = bits; | |
2161 | } | |
2162 | t.integer = 1; | |
2163 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2164 | } | |
2165 | ||
2166 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
2167 | #error "Change this table" | |
2168 | #endif | |
2169 | ||
8b674308 TS |
2170 | static const unsigned int rates[] = { |
2171 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
4cc4531c | 2172 | 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000 |
8b674308 | 2173 | }; |
1da177e4 | 2174 | |
7653d557 CL |
2175 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
2176 | .count = ARRAY_SIZE(rates), | |
2177 | .list = rates, | |
2178 | }; | |
2179 | ||
877211f5 TI |
2180 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
2181 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2182 | { |
877211f5 | 2183 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 2184 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
2185 | snd_pcm_known_rates.count, |
2186 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
2187 | } |
2188 | ||
877211f5 TI |
2189 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
2190 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2191 | { |
877211f5 TI |
2192 | struct snd_interval t; |
2193 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
2194 | t.min = 0; |
2195 | t.max = substream->buffer_bytes_max; | |
2196 | t.openmin = 0; | |
2197 | t.openmax = 0; | |
2198 | t.integer = 1; | |
2199 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2200 | } | |
2201 | ||
877211f5 | 2202 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2203 | { |
877211f5 TI |
2204 | struct snd_pcm_runtime *runtime = substream->runtime; |
2205 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2206 | int k, err; |
2207 | ||
2208 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2209 | snd_mask_any(constrs_mask(constrs, k)); | |
2210 | } | |
2211 | ||
2212 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2213 | snd_interval_any(constrs_interval(constrs, k)); | |
2214 | } | |
2215 | ||
2216 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2217 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2218 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2219 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2220 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2221 | ||
2222 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2223 | snd_pcm_hw_rule_format, NULL, | |
2224 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2225 | if (err < 0) | |
2226 | return err; | |
2227 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2228 | snd_pcm_hw_rule_sample_bits, NULL, | |
2229 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2230 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2231 | if (err < 0) | |
2232 | return err; | |
2233 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2234 | snd_pcm_hw_rule_div, NULL, | |
2235 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2236 | if (err < 0) | |
2237 | return err; | |
2238 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2239 | snd_pcm_hw_rule_mul, NULL, | |
2240 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2241 | if (err < 0) | |
2242 | return err; | |
2243 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2244 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2245 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2246 | if (err < 0) | |
2247 | return err; | |
2248 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2249 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2250 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2251 | if (err < 0) | |
2252 | return err; | |
2253 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2254 | snd_pcm_hw_rule_div, NULL, | |
2255 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2256 | if (err < 0) | |
2257 | return err; | |
2258 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2259 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2260 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2261 | if (err < 0) | |
2262 | return err; | |
2263 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2264 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2265 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2266 | if (err < 0) | |
2267 | return err; | |
2268 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2269 | snd_pcm_hw_rule_div, NULL, | |
2270 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2271 | if (err < 0) | |
2272 | return err; | |
2273 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2274 | snd_pcm_hw_rule_div, NULL, | |
2275 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2276 | if (err < 0) | |
2277 | return err; | |
2278 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2279 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2280 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2281 | if (err < 0) | |
2282 | return err; | |
2283 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2284 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2285 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2286 | if (err < 0) | |
2287 | return err; | |
2288 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2289 | snd_pcm_hw_rule_mul, NULL, | |
2290 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2291 | if (err < 0) | |
2292 | return err; | |
2293 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2294 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2295 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2296 | if (err < 0) | |
2297 | return err; | |
2298 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2299 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2300 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2301 | if (err < 0) | |
2302 | return err; | |
2303 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2304 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2305 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2306 | if (err < 0) | |
2307 | return err; | |
2308 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2309 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2310 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2311 | if (err < 0) | |
2312 | return err; | |
2313 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2314 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2315 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2316 | if (err < 0) | |
2317 | return err; | |
2318 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2319 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2320 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2321 | if (err < 0) | |
2322 | return err; | |
2323 | return 0; | |
2324 | } | |
2325 | ||
877211f5 | 2326 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2327 | { |
877211f5 TI |
2328 | struct snd_pcm_runtime *runtime = substream->runtime; |
2329 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2330 | int err; |
2331 | unsigned int mask = 0; | |
2332 | ||
2333 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2334 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2335 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2336 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2337 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2338 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2339 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2340 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2341 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2342 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2343 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2344 | } | |
2345 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2346 | if (err < 0) |
2347 | return err; | |
1da177e4 LT |
2348 | |
2349 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2350 | if (err < 0) |
2351 | return err; | |
1da177e4 LT |
2352 | |
2353 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2354 | if (err < 0) |
2355 | return err; | |
1da177e4 LT |
2356 | |
2357 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2358 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2359 | if (err < 0) |
2360 | return err; | |
1da177e4 LT |
2361 | |
2362 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2363 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2364 | if (err < 0) |
2365 | return err; | |
1da177e4 LT |
2366 | |
2367 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2368 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2369 | if (err < 0) |
2370 | return err; | |
1da177e4 LT |
2371 | |
2372 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2373 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2374 | if (err < 0) |
2375 | return err; | |
1da177e4 LT |
2376 | |
2377 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2378 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2379 | if (err < 0) |
2380 | return err; | |
1da177e4 LT |
2381 | |
2382 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2383 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2384 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2385 | if (err < 0) | |
2386 | return err; | |
2387 | ||
2388 | /* FIXME: remove */ | |
2389 | if (runtime->dma_bytes) { | |
2390 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2391 | if (err < 0) |
6cf95152 | 2392 | return err; |
1da177e4 LT |
2393 | } |
2394 | ||
2395 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2396 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2397 | snd_pcm_hw_rule_rate, hw, | |
2398 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2399 | if (err < 0) | |
2400 | return err; | |
2401 | } | |
2402 | ||
2403 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2404 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2405 | ||
2406 | return 0; | |
2407 | } | |
2408 | ||
3bf75f9b | 2409 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2410 | { |
b51abed8 TI |
2411 | if (snd_pcm_stream_linked(substream)) |
2412 | snd_pcm_unlink(substream); | |
3bf75f9b TI |
2413 | } |
2414 | ||
2415 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2416 | { | |
0df63e44 TI |
2417 | substream->ref_count--; |
2418 | if (substream->ref_count > 0) | |
2419 | return; | |
2420 | ||
3bf75f9b | 2421 | snd_pcm_drop(substream); |
3bf75f9b | 2422 | if (substream->hw_opened) { |
094435d4 TI |
2423 | if (substream->ops->hw_free && |
2424 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2425 | substream->ops->hw_free(substream); |
2426 | substream->ops->close(substream); | |
3bf75f9b | 2427 | substream->hw_opened = 0; |
1da177e4 | 2428 | } |
8699a0b6 TI |
2429 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2430 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2431 | if (substream->pcm_release) { |
2432 | substream->pcm_release(substream); | |
2433 | substream->pcm_release = NULL; | |
2434 | } | |
3bf75f9b TI |
2435 | snd_pcm_detach_substream(substream); |
2436 | } | |
e88e8ae6 TI |
2437 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2438 | ||
3bf75f9b TI |
2439 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2440 | struct file *file, | |
2441 | struct snd_pcm_substream **rsubstream) | |
2442 | { | |
2443 | struct snd_pcm_substream *substream; | |
2444 | int err; | |
2445 | ||
2446 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2447 | if (err < 0) | |
2448 | return err; | |
0df63e44 TI |
2449 | if (substream->ref_count > 1) { |
2450 | *rsubstream = substream; | |
2451 | return 0; | |
2452 | } | |
2453 | ||
3bf75f9b TI |
2454 | err = snd_pcm_hw_constraints_init(substream); |
2455 | if (err < 0) { | |
09e56df8 | 2456 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2457 | goto error; |
2458 | } | |
2459 | ||
2460 | if ((err = substream->ops->open(substream)) < 0) | |
2461 | goto error; | |
2462 | ||
2463 | substream->hw_opened = 1; | |
2464 | ||
2465 | err = snd_pcm_hw_constraints_complete(substream); | |
2466 | if (err < 0) { | |
09e56df8 | 2467 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2468 | goto error; |
2469 | } | |
2470 | ||
2471 | *rsubstream = substream; | |
1da177e4 | 2472 | return 0; |
3bf75f9b TI |
2473 | |
2474 | error: | |
2475 | snd_pcm_release_substream(substream); | |
2476 | return err; | |
1da177e4 | 2477 | } |
e88e8ae6 TI |
2478 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2479 | ||
1da177e4 | 2480 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2481 | struct snd_pcm *pcm, |
ffd3d5c6 | 2482 | int stream) |
1da177e4 | 2483 | { |
877211f5 TI |
2484 | struct snd_pcm_file *pcm_file; |
2485 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2486 | int err; |
1da177e4 | 2487 | |
3bf75f9b TI |
2488 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2489 | if (err < 0) | |
2490 | return err; | |
2491 | ||
548a648b TI |
2492 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2493 | if (pcm_file == NULL) { | |
2494 | snd_pcm_release_substream(substream); | |
2495 | return -ENOMEM; | |
2496 | } | |
2497 | pcm_file->substream = substream; | |
de89750c | 2498 | if (substream->ref_count == 1) |
0df63e44 | 2499 | substream->pcm_release = pcm_release_private; |
1da177e4 | 2500 | file->private_data = pcm_file; |
ffd3d5c6 | 2501 | |
1da177e4 LT |
2502 | return 0; |
2503 | } | |
2504 | ||
f87135f5 CL |
2505 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2506 | { | |
2507 | struct snd_pcm *pcm; | |
02f4865f TI |
2508 | int err = nonseekable_open(inode, file); |
2509 | if (err < 0) | |
2510 | return err; | |
f87135f5 CL |
2511 | pcm = snd_lookup_minor_data(iminor(inode), |
2512 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2513 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2514 | if (pcm) |
2515 | snd_card_unref(pcm->card); | |
a0830dbd | 2516 | return err; |
f87135f5 CL |
2517 | } |
2518 | ||
2519 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2520 | { |
877211f5 | 2521 | struct snd_pcm *pcm; |
02f4865f TI |
2522 | int err = nonseekable_open(inode, file); |
2523 | if (err < 0) | |
2524 | return err; | |
f87135f5 CL |
2525 | pcm = snd_lookup_minor_data(iminor(inode), |
2526 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2527 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2528 | if (pcm) |
2529 | snd_card_unref(pcm->card); | |
a0830dbd | 2530 | return err; |
f87135f5 CL |
2531 | } |
2532 | ||
2533 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2534 | { | |
2535 | int err; | |
ac6424b9 | 2536 | wait_queue_entry_t wait; |
1da177e4 | 2537 | |
1da177e4 LT |
2538 | if (pcm == NULL) { |
2539 | err = -ENODEV; | |
2540 | goto __error1; | |
2541 | } | |
2542 | err = snd_card_file_add(pcm->card, file); | |
2543 | if (err < 0) | |
2544 | goto __error1; | |
2545 | if (!try_module_get(pcm->card->module)) { | |
2546 | err = -EFAULT; | |
2547 | goto __error2; | |
2548 | } | |
2549 | init_waitqueue_entry(&wait, current); | |
2550 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2551 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2552 | while (1) { |
ffd3d5c6 | 2553 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2554 | if (err >= 0) |
2555 | break; | |
2556 | if (err == -EAGAIN) { | |
2557 | if (file->f_flags & O_NONBLOCK) { | |
2558 | err = -EBUSY; | |
2559 | break; | |
2560 | } | |
2561 | } else | |
2562 | break; | |
2563 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2564 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2565 | schedule(); |
1a60d4c5 | 2566 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2567 | if (pcm->card->shutdown) { |
2568 | err = -ENODEV; | |
2569 | break; | |
2570 | } | |
1da177e4 LT |
2571 | if (signal_pending(current)) { |
2572 | err = -ERESTARTSYS; | |
2573 | break; | |
2574 | } | |
2575 | } | |
2576 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2577 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2578 | if (err < 0) |
2579 | goto __error; | |
2580 | return err; | |
2581 | ||
2582 | __error: | |
2583 | module_put(pcm->card->module); | |
2584 | __error2: | |
2585 | snd_card_file_remove(pcm->card, file); | |
2586 | __error1: | |
2587 | return err; | |
2588 | } | |
2589 | ||
2590 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2591 | { | |
877211f5 TI |
2592 | struct snd_pcm *pcm; |
2593 | struct snd_pcm_substream *substream; | |
2594 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2595 | |
2596 | pcm_file = file->private_data; | |
2597 | substream = pcm_file->substream; | |
7eaa943c TI |
2598 | if (snd_BUG_ON(!substream)) |
2599 | return -ENXIO; | |
1da177e4 | 2600 | pcm = substream->pcm; |
1a60d4c5 | 2601 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2602 | snd_pcm_release_substream(substream); |
548a648b | 2603 | kfree(pcm_file); |
1a60d4c5 | 2604 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2605 | wake_up(&pcm->open_wait); |
2606 | module_put(pcm->card->module); | |
2607 | snd_card_file_remove(pcm->card, file); | |
2608 | return 0; | |
2609 | } | |
2610 | ||
f839cc1c TI |
2611 | /* check and update PCM state; return 0 or a negative error |
2612 | * call this inside PCM lock | |
2613 | */ | |
2614 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) | |
1da177e4 | 2615 | { |
f839cc1c | 2616 | switch (substream->runtime->status->state) { |
1da177e4 | 2617 | case SNDRV_PCM_STATE_DRAINING: |
f839cc1c TI |
2618 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
2619 | return -EBADFD; | |
1da177e4 | 2620 | /* Fall through */ |
f839cc1c TI |
2621 | case SNDRV_PCM_STATE_RUNNING: |
2622 | return snd_pcm_update_hw_ptr(substream); | |
2623 | case SNDRV_PCM_STATE_PREPARED: | |
2624 | case SNDRV_PCM_STATE_PAUSED: | |
2625 | return 0; | |
51840409 | 2626 | case SNDRV_PCM_STATE_SUSPENDED: |
f839cc1c TI |
2627 | return -ESTRPIPE; |
2628 | case SNDRV_PCM_STATE_XRUN: | |
2629 | return -EPIPE; | |
1da177e4 | 2630 | default: |
f839cc1c | 2631 | return -EBADFD; |
1da177e4 | 2632 | } |
f839cc1c | 2633 | } |
1da177e4 | 2634 | |
9027c463 | 2635 | /* increase the appl_ptr; returns the processed frames or a negative error */ |
e0327a0f TI |
2636 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, |
2637 | snd_pcm_uframes_t frames, | |
2638 | snd_pcm_sframes_t avail) | |
2639 | { | |
2640 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2641 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2642 | int ret; |
e0327a0f TI |
2643 | |
2644 | if (avail <= 0) | |
2645 | return 0; | |
2646 | if (frames > (snd_pcm_uframes_t)avail) | |
2647 | frames = avail; | |
2648 | appl_ptr = runtime->control->appl_ptr + frames; | |
2649 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2650 | appl_ptr -= runtime->boundary; | |
66e01a5c | 2651 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
9027c463 | 2652 | return ret < 0 ? ret : frames; |
e0327a0f TI |
2653 | } |
2654 | ||
fb51f1cd | 2655 | /* decrease the appl_ptr; returns the processed frames or zero for error */ |
e0327a0f TI |
2656 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, |
2657 | snd_pcm_uframes_t frames, | |
2658 | snd_pcm_sframes_t avail) | |
2659 | { | |
2660 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2661 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2662 | int ret; |
e0327a0f TI |
2663 | |
2664 | if (avail <= 0) | |
2665 | return 0; | |
2666 | if (frames > (snd_pcm_uframes_t)avail) | |
2667 | frames = avail; | |
1da177e4 LT |
2668 | appl_ptr = runtime->control->appl_ptr - frames; |
2669 | if (appl_ptr < 0) | |
2670 | appl_ptr += runtime->boundary; | |
66e01a5c | 2671 | ret = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
fb51f1cd TI |
2672 | /* NOTE: we return zero for errors because PulseAudio gets depressed |
2673 | * upon receiving an error from rewind ioctl and stops processing | |
2674 | * any longer. Returning zero means that no rewind is done, so | |
2675 | * it's not absolutely wrong to answer like that. | |
2676 | */ | |
2677 | return ret < 0 ? 0 : frames; | |
e0327a0f TI |
2678 | } |
2679 | ||
763e5067 TI |
2680 | static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream, |
2681 | snd_pcm_uframes_t frames) | |
1da177e4 | 2682 | { |
1da177e4 | 2683 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2684 | |
2685 | if (frames == 0) | |
2686 | return 0; | |
2687 | ||
2688 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2689 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2690 | if (!ret) |
2691 | ret = rewind_appl_ptr(substream, frames, | |
763e5067 | 2692 | snd_pcm_hw_avail(substream)); |
1da177e4 LT |
2693 | snd_pcm_stream_unlock_irq(substream); |
2694 | return ret; | |
2695 | } | |
2696 | ||
763e5067 TI |
2697 | static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream, |
2698 | snd_pcm_uframes_t frames) | |
1da177e4 | 2699 | { |
1da177e4 | 2700 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2701 | |
2702 | if (frames == 0) | |
2703 | return 0; | |
2704 | ||
2705 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2706 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2707 | if (!ret) |
2708 | ret = forward_appl_ptr(substream, frames, | |
763e5067 | 2709 | snd_pcm_avail(substream)); |
1da177e4 LT |
2710 | snd_pcm_stream_unlock_irq(substream); |
2711 | return ret; | |
2712 | } | |
2713 | ||
877211f5 | 2714 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2715 | { |
1da177e4 LT |
2716 | int err; |
2717 | ||
2718 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2719 | err = do_pcm_hwsync(substream); |
1da177e4 LT |
2720 | snd_pcm_stream_unlock_irq(substream); |
2721 | return err; | |
2722 | } | |
2723 | ||
912e4c33 JM |
2724 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2725 | snd_pcm_sframes_t *delay) | |
1da177e4 | 2726 | { |
1da177e4 LT |
2727 | int err; |
2728 | snd_pcm_sframes_t n = 0; | |
2729 | ||
2730 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2731 | err = do_pcm_hwsync(substream); |
c99c5a3b TI |
2732 | if (!err) |
2733 | n = snd_pcm_calc_delay(substream); | |
1da177e4 | 2734 | snd_pcm_stream_unlock_irq(substream); |
912e4c33 JM |
2735 | if (!err) |
2736 | *delay = n; | |
2737 | return err; | |
1da177e4 LT |
2738 | } |
2739 | ||
877211f5 TI |
2740 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2741 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2742 | { |
877211f5 TI |
2743 | struct snd_pcm_runtime *runtime = substream->runtime; |
2744 | struct snd_pcm_sync_ptr sync_ptr; | |
2745 | volatile struct snd_pcm_mmap_status *status; | |
2746 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2747 | int err; |
2748 | ||
2749 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2750 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2751 | return -EFAULT; | |
877211f5 | 2752 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2753 | return -EFAULT; |
2754 | status = runtime->status; | |
2755 | control = runtime->control; | |
2756 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2757 | err = snd_pcm_hwsync(substream); | |
2758 | if (err < 0) | |
2759 | return err; | |
2760 | } | |
2761 | snd_pcm_stream_lock_irq(substream); | |
9027c463 | 2762 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { |
66e01a5c TS |
2763 | err = pcm_lib_apply_appl_ptr(substream, |
2764 | sync_ptr.c.control.appl_ptr); | |
9027c463 TI |
2765 | if (err < 0) { |
2766 | snd_pcm_stream_unlock_irq(substream); | |
2767 | return err; | |
2768 | } | |
2769 | } else { | |
1da177e4 | 2770 | sync_ptr.c.control.appl_ptr = control->appl_ptr; |
9027c463 | 2771 | } |
1da177e4 LT |
2772 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
2773 | control->avail_min = sync_ptr.c.control.avail_min; | |
2774 | else | |
2775 | sync_ptr.c.control.avail_min = control->avail_min; | |
2776 | sync_ptr.s.status.state = status->state; | |
2777 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2778 | sync_ptr.s.status.tstamp = status->tstamp; | |
2779 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
f853dcaa | 2780 | sync_ptr.s.status.audio_tstamp = status->audio_tstamp; |
1da177e4 LT |
2781 | snd_pcm_stream_unlock_irq(substream); |
2782 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2783 | return -EFAULT; | |
2784 | return 0; | |
2785 | } | |
b751eef1 JK |
2786 | |
2787 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2788 | { | |
2789 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2790 | int arg; | |
2791 | ||
2792 | if (get_user(arg, _arg)) | |
2793 | return -EFAULT; | |
2794 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2795 | return -EINVAL; | |
2408c219 | 2796 | runtime->tstamp_type = arg; |
b751eef1 JK |
2797 | return 0; |
2798 | } | |
67616fed TI |
2799 | |
2800 | static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream, | |
2801 | struct snd_xferi __user *_xferi) | |
2802 | { | |
2803 | struct snd_xferi xferi; | |
2804 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2805 | snd_pcm_sframes_t result; | |
2806 | ||
2807 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2808 | return -EBADFD; | |
2809 | if (put_user(0, &_xferi->result)) | |
2810 | return -EFAULT; | |
2811 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2812 | return -EFAULT; | |
2813 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2814 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2815 | else | |
2816 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2817 | __put_user(result, &_xferi->result); | |
2818 | return result < 0 ? result : 0; | |
2819 | } | |
2820 | ||
2821 | static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream, | |
2822 | struct snd_xfern __user *_xfern) | |
2823 | { | |
2824 | struct snd_xfern xfern; | |
2825 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2826 | void *bufs; | |
2827 | snd_pcm_sframes_t result; | |
2828 | ||
2829 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2830 | return -EBADFD; | |
2831 | if (runtime->channels > 128) | |
2832 | return -EINVAL; | |
2833 | if (put_user(0, &_xfern->result)) | |
2834 | return -EFAULT; | |
2835 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2836 | return -EFAULT; | |
2837 | ||
2838 | bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels); | |
2839 | if (IS_ERR(bufs)) | |
2840 | return PTR_ERR(bufs); | |
2841 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2842 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); | |
2843 | else | |
2844 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); | |
2845 | kfree(bufs); | |
2846 | __put_user(result, &_xfern->result); | |
2847 | return result < 0 ? result : 0; | |
2848 | } | |
2849 | ||
2850 | static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream, | |
2851 | snd_pcm_uframes_t __user *_frames) | |
2852 | { | |
2853 | snd_pcm_uframes_t frames; | |
2854 | snd_pcm_sframes_t result; | |
2855 | ||
2856 | if (get_user(frames, _frames)) | |
2857 | return -EFAULT; | |
2858 | if (put_user(0, _frames)) | |
2859 | return -EFAULT; | |
763e5067 | 2860 | result = snd_pcm_rewind(substream, frames); |
67616fed TI |
2861 | __put_user(result, _frames); |
2862 | return result < 0 ? result : 0; | |
2863 | } | |
2864 | ||
2865 | static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream, | |
2866 | snd_pcm_uframes_t __user *_frames) | |
2867 | { | |
2868 | snd_pcm_uframes_t frames; | |
2869 | snd_pcm_sframes_t result; | |
2870 | ||
2871 | if (get_user(frames, _frames)) | |
2872 | return -EFAULT; | |
2873 | if (put_user(0, _frames)) | |
2874 | return -EFAULT; | |
763e5067 | 2875 | result = snd_pcm_forward(substream, frames); |
67616fed TI |
2876 | __put_user(result, _frames); |
2877 | return result < 0 ? result : 0; | |
2878 | } | |
2879 | ||
2880 | static int snd_pcm_common_ioctl(struct file *file, | |
0df63e44 | 2881 | struct snd_pcm_substream *substream, |
1da177e4 LT |
2882 | unsigned int cmd, void __user *arg) |
2883 | { | |
4b671f57 | 2884 | struct snd_pcm_file *pcm_file = file->private_data; |
7d8e8292 TI |
2885 | int res; |
2886 | ||
67616fed TI |
2887 | if (PCM_RUNTIME_CHECK(substream)) |
2888 | return -ENXIO; | |
2889 | ||
7d8e8292 TI |
2890 | res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0); |
2891 | if (res < 0) | |
2892 | return res; | |
4b671f57 | 2893 | |
1da177e4 LT |
2894 | switch (cmd) { |
2895 | case SNDRV_PCM_IOCTL_PVERSION: | |
2896 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2897 | case SNDRV_PCM_IOCTL_INFO: | |
2898 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2899 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2900 | return 0; | |
b751eef1 JK |
2901 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2902 | return snd_pcm_tstamp(substream, arg); | |
4b671f57 TI |
2903 | case SNDRV_PCM_IOCTL_USER_PVERSION: |
2904 | if (get_user(pcm_file->user_pversion, | |
2905 | (unsigned int __user *)arg)) | |
2906 | return -EFAULT; | |
2907 | return 0; | |
1da177e4 LT |
2908 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2909 | return snd_pcm_hw_refine_user(substream, arg); | |
2910 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2911 | return snd_pcm_hw_params_user(substream, arg); | |
2912 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2913 | return snd_pcm_hw_free(substream); | |
2914 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2915 | return snd_pcm_sw_params_user(substream, arg); | |
2916 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2917 | return snd_pcm_status_user(substream, arg, false); |
2918 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2919 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2920 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2921 | return snd_pcm_channel_info_user(substream, arg); | |
2922 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2923 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2924 | case SNDRV_PCM_IOCTL_RESET: |
2925 | return snd_pcm_reset(substream); | |
2926 | case SNDRV_PCM_IOCTL_START: | |
c2c86a97 | 2927 | return snd_pcm_start_lock_irq(substream); |
1da177e4 LT |
2928 | case SNDRV_PCM_IOCTL_LINK: |
2929 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2930 | case SNDRV_PCM_IOCTL_UNLINK: | |
2931 | return snd_pcm_unlink(substream); | |
2932 | case SNDRV_PCM_IOCTL_RESUME: | |
2933 | return snd_pcm_resume(substream); | |
2934 | case SNDRV_PCM_IOCTL_XRUN: | |
2935 | return snd_pcm_xrun(substream); | |
2936 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2937 | return snd_pcm_hwsync(substream); | |
2938 | case SNDRV_PCM_IOCTL_DELAY: | |
c2c86a97 | 2939 | { |
912e4c33 | 2940 | snd_pcm_sframes_t delay; |
c2c86a97 | 2941 | snd_pcm_sframes_t __user *res = arg; |
912e4c33 | 2942 | int err; |
c2c86a97 | 2943 | |
912e4c33 JM |
2944 | err = snd_pcm_delay(substream, &delay); |
2945 | if (err) | |
2946 | return err; | |
c2c86a97 TI |
2947 | if (put_user(delay, res)) |
2948 | return -EFAULT; | |
2949 | return 0; | |
2950 | } | |
1da177e4 LT |
2951 | case SNDRV_PCM_IOCTL_SYNC_PTR: |
2952 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2953 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2954 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2955 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2956 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2957 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2958 | #endif |
1da177e4 | 2959 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2960 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2961 | case SNDRV_PCM_IOCTL_DROP: |
2962 | return snd_pcm_drop(substream); | |
e661d0dd | 2963 | case SNDRV_PCM_IOCTL_PAUSE: |
34bcc44a TI |
2964 | return snd_pcm_action_lock_irq(&snd_pcm_action_pause, |
2965 | substream, | |
2966 | (int)(unsigned long)arg); | |
1da177e4 | 2967 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: |
1da177e4 | 2968 | case SNDRV_PCM_IOCTL_READI_FRAMES: |
67616fed TI |
2969 | return snd_pcm_xferi_frames_ioctl(substream, arg); |
2970 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
1da177e4 | 2971 | case SNDRV_PCM_IOCTL_READN_FRAMES: |
67616fed | 2972 | return snd_pcm_xfern_frames_ioctl(substream, arg); |
1da177e4 | 2973 | case SNDRV_PCM_IOCTL_REWIND: |
67616fed | 2974 | return snd_pcm_rewind_ioctl(substream, arg); |
1da177e4 | 2975 | case SNDRV_PCM_IOCTL_FORWARD: |
67616fed | 2976 | return snd_pcm_forward_ioctl(substream, arg); |
1da177e4 | 2977 | } |
67616fed TI |
2978 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
2979 | return -ENOTTY; | |
1da177e4 LT |
2980 | } |
2981 | ||
67616fed TI |
2982 | static long snd_pcm_ioctl(struct file *file, unsigned int cmd, |
2983 | unsigned long arg) | |
1da177e4 | 2984 | { |
877211f5 | 2985 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2986 | |
2987 | pcm_file = file->private_data; | |
2988 | ||
2989 | if (((cmd >> 8) & 0xff) != 'A') | |
2990 | return -ENOTTY; | |
2991 | ||
67616fed TI |
2992 | return snd_pcm_common_ioctl(file, pcm_file->substream, cmd, |
2993 | (void __user *)arg); | |
1da177e4 LT |
2994 | } |
2995 | ||
c2c86a97 TI |
2996 | /** |
2997 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space | |
2998 | * @substream: PCM substream | |
2999 | * @cmd: IOCTL cmd | |
3000 | * @arg: IOCTL argument | |
3001 | * | |
3002 | * The function is provided primarily for OSS layer and USB gadget drivers, | |
3003 | * and it allows only the limited set of ioctls (hw_params, sw_params, | |
3004 | * prepare, start, drain, drop, forward). | |
3005 | */ | |
bf1bbb5a TI |
3006 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
3007 | unsigned int cmd, void *arg) | |
1da177e4 | 3008 | { |
c2c86a97 TI |
3009 | snd_pcm_uframes_t *frames = arg; |
3010 | snd_pcm_sframes_t result; | |
1da177e4 | 3011 | |
c2c86a97 TI |
3012 | switch (cmd) { |
3013 | case SNDRV_PCM_IOCTL_FORWARD: | |
3014 | { | |
3015 | /* provided only for OSS; capture-only and no value returned */ | |
3016 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
3017 | return -EINVAL; | |
763e5067 | 3018 | result = snd_pcm_forward(substream, *frames); |
c2c86a97 TI |
3019 | return result < 0 ? result : 0; |
3020 | } | |
3021 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
3022 | return snd_pcm_hw_params(substream, arg); | |
3023 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
3024 | return snd_pcm_sw_params(substream, arg); | |
3025 | case SNDRV_PCM_IOCTL_PREPARE: | |
3026 | return snd_pcm_prepare(substream, NULL); | |
3027 | case SNDRV_PCM_IOCTL_START: | |
3028 | return snd_pcm_start_lock_irq(substream); | |
3029 | case SNDRV_PCM_IOCTL_DRAIN: | |
7d8e8292 | 3030 | return snd_pcm_drain(substream, NULL); |
c2c86a97 TI |
3031 | case SNDRV_PCM_IOCTL_DROP: |
3032 | return snd_pcm_drop(substream); | |
3033 | case SNDRV_PCM_IOCTL_DELAY: | |
912e4c33 | 3034 | return snd_pcm_delay(substream, frames); |
1da177e4 | 3035 | default: |
c2c86a97 | 3036 | return -EINVAL; |
1da177e4 LT |
3037 | } |
3038 | } | |
e88e8ae6 TI |
3039 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3040 | ||
877211f5 TI |
3041 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3042 | loff_t * offset) | |
1da177e4 | 3043 | { |
877211f5 TI |
3044 | struct snd_pcm_file *pcm_file; |
3045 | struct snd_pcm_substream *substream; | |
3046 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3047 | snd_pcm_sframes_t result; |
3048 | ||
3049 | pcm_file = file->private_data; | |
3050 | substream = pcm_file->substream; | |
7eaa943c TI |
3051 | if (PCM_RUNTIME_CHECK(substream)) |
3052 | return -ENXIO; | |
1da177e4 LT |
3053 | runtime = substream->runtime; |
3054 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3055 | return -EBADFD; | |
3056 | if (!frame_aligned(runtime, count)) | |
3057 | return -EINVAL; | |
3058 | count = bytes_to_frames(runtime, count); | |
3059 | result = snd_pcm_lib_read(substream, buf, count); | |
3060 | if (result > 0) | |
3061 | result = frames_to_bytes(runtime, result); | |
3062 | return result; | |
3063 | } | |
3064 | ||
877211f5 TI |
3065 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3066 | size_t count, loff_t * offset) | |
1da177e4 | 3067 | { |
877211f5 TI |
3068 | struct snd_pcm_file *pcm_file; |
3069 | struct snd_pcm_substream *substream; | |
3070 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3071 | snd_pcm_sframes_t result; |
3072 | ||
3073 | pcm_file = file->private_data; | |
3074 | substream = pcm_file->substream; | |
7eaa943c TI |
3075 | if (PCM_RUNTIME_CHECK(substream)) |
3076 | return -ENXIO; | |
1da177e4 | 3077 | runtime = substream->runtime; |
7eaa943c TI |
3078 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3079 | return -EBADFD; | |
3080 | if (!frame_aligned(runtime, count)) | |
3081 | return -EINVAL; | |
1da177e4 LT |
3082 | count = bytes_to_frames(runtime, count); |
3083 | result = snd_pcm_lib_write(substream, buf, count); | |
3084 | if (result > 0) | |
3085 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3086 | return result; |
3087 | } | |
3088 | ||
1c65d986 | 3089 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3090 | { |
877211f5 TI |
3091 | struct snd_pcm_file *pcm_file; |
3092 | struct snd_pcm_substream *substream; | |
3093 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3094 | snd_pcm_sframes_t result; |
3095 | unsigned long i; | |
3096 | void __user **bufs; | |
3097 | snd_pcm_uframes_t frames; | |
3098 | ||
ee0b3e67 | 3099 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3100 | substream = pcm_file->substream; |
7eaa943c TI |
3101 | if (PCM_RUNTIME_CHECK(substream)) |
3102 | return -ENXIO; | |
1da177e4 LT |
3103 | runtime = substream->runtime; |
3104 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3105 | return -EBADFD; | |
1c65d986 AV |
3106 | if (!iter_is_iovec(to)) |
3107 | return -EINVAL; | |
3108 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3109 | return -EINVAL; |
1c65d986 | 3110 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3111 | return -EINVAL; |
1c65d986 | 3112 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
6da2ec56 | 3113 | bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
3114 | if (bufs == NULL) |
3115 | return -ENOMEM; | |
1c65d986 AV |
3116 | for (i = 0; i < to->nr_segs; ++i) |
3117 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3118 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3119 | if (result > 0) | |
3120 | result = frames_to_bytes(runtime, result); | |
3121 | kfree(bufs); | |
3122 | return result; | |
3123 | } | |
3124 | ||
1c65d986 | 3125 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3126 | { |
877211f5 TI |
3127 | struct snd_pcm_file *pcm_file; |
3128 | struct snd_pcm_substream *substream; | |
3129 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3130 | snd_pcm_sframes_t result; |
3131 | unsigned long i; | |
3132 | void __user **bufs; | |
3133 | snd_pcm_uframes_t frames; | |
3134 | ||
ee0b3e67 | 3135 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3136 | substream = pcm_file->substream; |
7eaa943c TI |
3137 | if (PCM_RUNTIME_CHECK(substream)) |
3138 | return -ENXIO; | |
1da177e4 | 3139 | runtime = substream->runtime; |
7eaa943c TI |
3140 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3141 | return -EBADFD; | |
1c65d986 AV |
3142 | if (!iter_is_iovec(from)) |
3143 | return -EINVAL; | |
3144 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3145 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3146 | return -EINVAL; |
1c65d986 | 3147 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
6da2ec56 | 3148 | bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
3149 | if (bufs == NULL) |
3150 | return -ENOMEM; | |
1c65d986 AV |
3151 | for (i = 0; i < from->nr_segs; ++i) |
3152 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3153 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3154 | if (result > 0) | |
3155 | result = frames_to_bytes(runtime, result); | |
3156 | kfree(bufs); | |
1da177e4 LT |
3157 | return result; |
3158 | } | |
3159 | ||
6448fcba | 3160 | static __poll_t snd_pcm_poll(struct file *file, poll_table *wait) |
1da177e4 | 3161 | { |
877211f5 TI |
3162 | struct snd_pcm_file *pcm_file; |
3163 | struct snd_pcm_substream *substream; | |
3164 | struct snd_pcm_runtime *runtime; | |
6448fcba | 3165 | __poll_t mask, ok; |
1da177e4 LT |
3166 | snd_pcm_uframes_t avail; |
3167 | ||
3168 | pcm_file = file->private_data; | |
3169 | ||
3170 | substream = pcm_file->substream; | |
6448fcba TI |
3171 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
3172 | ok = EPOLLOUT | EPOLLWRNORM; | |
3173 | else | |
3174 | ok = EPOLLIN | EPOLLRDNORM; | |
7eaa943c | 3175 | if (PCM_RUNTIME_CHECK(substream)) |
6448fcba | 3176 | return ok | EPOLLERR; |
1da177e4 | 3177 | |
1da177e4 | 3178 | runtime = substream->runtime; |
1da177e4 LT |
3179 | poll_wait(file, &runtime->sleep, wait); |
3180 | ||
6448fcba | 3181 | mask = 0; |
1da177e4 | 3182 | snd_pcm_stream_lock_irq(substream); |
6448fcba | 3183 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
3184 | switch (runtime->status->state) { |
3185 | case SNDRV_PCM_STATE_RUNNING: | |
3186 | case SNDRV_PCM_STATE_PREPARED: | |
3187 | case SNDRV_PCM_STATE_PAUSED: | |
6448fcba TI |
3188 | if (avail >= runtime->control->avail_min) |
3189 | mask = ok; | |
1da177e4 LT |
3190 | break; |
3191 | case SNDRV_PCM_STATE_DRAINING: | |
6448fcba TI |
3192 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
3193 | mask = ok; | |
3194 | if (!avail) | |
3195 | mask |= EPOLLERR; | |
1da177e4 | 3196 | } |
6448fcba | 3197 | break; |
1da177e4 | 3198 | default: |
6448fcba | 3199 | mask = ok | EPOLLERR; |
1da177e4 LT |
3200 | break; |
3201 | } | |
3202 | snd_pcm_stream_unlock_irq(substream); | |
3203 | return mask; | |
3204 | } | |
3205 | ||
3206 | /* | |
3207 | * mmap support | |
3208 | */ | |
3209 | ||
3210 | /* | |
3211 | * Only on coherent architectures, we can mmap the status and the control records | |
3212 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3213 | */ | |
3214 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3215 | /* | |
3216 | * mmap status record | |
3217 | */ | |
41412fe9 | 3218 | static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf) |
1da177e4 | 3219 | { |
11bac800 | 3220 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3221 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3222 | |
3223 | if (substream == NULL) | |
3ad5afcd | 3224 | return VM_FAULT_SIGBUS; |
1da177e4 | 3225 | runtime = substream->runtime; |
3ad5afcd NP |
3226 | vmf->page = virt_to_page(runtime->status); |
3227 | get_page(vmf->page); | |
3228 | return 0; | |
1da177e4 LT |
3229 | } |
3230 | ||
f0f37e2f | 3231 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3232 | { |
3ad5afcd | 3233 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3234 | }; |
3235 | ||
877211f5 | 3236 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3237 | struct vm_area_struct *area) |
3238 | { | |
1da177e4 LT |
3239 | long size; |
3240 | if (!(area->vm_flags & VM_READ)) | |
3241 | return -EINVAL; | |
1da177e4 | 3242 | size = area->vm_end - area->vm_start; |
877211f5 | 3243 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3244 | return -EINVAL; |
3245 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3246 | area->vm_private_data = substream; | |
314e51b9 | 3247 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3248 | return 0; |
3249 | } | |
3250 | ||
3251 | /* | |
3252 | * mmap control record | |
3253 | */ | |
41412fe9 | 3254 | static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf) |
1da177e4 | 3255 | { |
11bac800 | 3256 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3257 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3258 | |
3259 | if (substream == NULL) | |
3ad5afcd | 3260 | return VM_FAULT_SIGBUS; |
1da177e4 | 3261 | runtime = substream->runtime; |
3ad5afcd NP |
3262 | vmf->page = virt_to_page(runtime->control); |
3263 | get_page(vmf->page); | |
3264 | return 0; | |
1da177e4 LT |
3265 | } |
3266 | ||
f0f37e2f | 3267 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3268 | { |
3ad5afcd | 3269 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3270 | }; |
3271 | ||
877211f5 | 3272 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3273 | struct vm_area_struct *area) |
3274 | { | |
1da177e4 LT |
3275 | long size; |
3276 | if (!(area->vm_flags & VM_READ)) | |
3277 | return -EINVAL; | |
1da177e4 | 3278 | size = area->vm_end - area->vm_start; |
877211f5 | 3279 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3280 | return -EINVAL; |
3281 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3282 | area->vm_private_data = substream; | |
314e51b9 | 3283 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3284 | return 0; |
3285 | } | |
42f94597 TI |
3286 | |
3287 | static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3288 | { | |
3289 | if (pcm_file->no_compat_mmap) | |
3290 | return false; | |
b602aa8e TI |
3291 | /* See pcm_control_mmap_allowed() below. |
3292 | * Since older alsa-lib requires both status and control mmaps to be | |
3293 | * coupled, we have to disable the status mmap for old alsa-lib, too. | |
3294 | */ | |
3295 | if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) && | |
3296 | (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)) | |
3297 | return false; | |
3298 | return true; | |
3299 | } | |
3300 | ||
3301 | static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file) | |
3302 | { | |
3303 | if (pcm_file->no_compat_mmap) | |
3304 | return false; | |
3305 | /* Disallow the control mmap when SYNC_APPLPTR flag is set; | |
42f94597 TI |
3306 | * it enforces the user-space to fall back to snd_pcm_sync_ptr(), |
3307 | * thus it effectively assures the manual update of appl_ptr. | |
42f94597 TI |
3308 | */ |
3309 | if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR) | |
3310 | return false; | |
3311 | return true; | |
3312 | } | |
3313 | ||
1da177e4 LT |
3314 | #else /* ! coherent mmap */ |
3315 | /* | |
3316 | * don't support mmap for status and control records. | |
3317 | */ | |
42f94597 | 3318 | #define pcm_status_mmap_allowed(pcm_file) false |
b602aa8e | 3319 | #define pcm_control_mmap_allowed(pcm_file) false |
42f94597 | 3320 | |
877211f5 | 3321 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3322 | struct vm_area_struct *area) |
3323 | { | |
3324 | return -ENXIO; | |
3325 | } | |
877211f5 | 3326 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3327 | struct vm_area_struct *area) |
3328 | { | |
3329 | return -ENXIO; | |
3330 | } | |
3331 | #endif /* coherent mmap */ | |
3332 | ||
9eb4a067 TI |
3333 | static inline struct page * |
3334 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3335 | { | |
3336 | void *vaddr = substream->runtime->dma_area + ofs; | |
3337 | return virt_to_page(vaddr); | |
3338 | } | |
3339 | ||
1da177e4 | 3340 | /* |
3ad5afcd | 3341 | * fault callback for mmapping a RAM page |
1da177e4 | 3342 | */ |
41412fe9 | 3343 | static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf) |
1da177e4 | 3344 | { |
11bac800 | 3345 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3346 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3347 | unsigned long offset; |
3348 | struct page * page; | |
1da177e4 LT |
3349 | size_t dma_bytes; |
3350 | ||
3351 | if (substream == NULL) | |
3ad5afcd | 3352 | return VM_FAULT_SIGBUS; |
1da177e4 | 3353 | runtime = substream->runtime; |
3ad5afcd | 3354 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3355 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3356 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3357 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3358 | if (substream->ops->page) |
1da177e4 | 3359 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3360 | else |
3361 | page = snd_pcm_default_page_ops(substream, offset); | |
3362 | if (!page) | |
3363 | return VM_FAULT_SIGBUS; | |
b5810039 | 3364 | get_page(page); |
3ad5afcd NP |
3365 | vmf->page = page; |
3366 | return 0; | |
1da177e4 LT |
3367 | } |
3368 | ||
657b1989 TI |
3369 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3370 | .open = snd_pcm_mmap_data_open, | |
3371 | .close = snd_pcm_mmap_data_close, | |
3372 | }; | |
3373 | ||
3374 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3375 | .open = snd_pcm_mmap_data_open, |
3376 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3377 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3378 | }; |
3379 | ||
3380 | /* | |
3381 | * mmap the DMA buffer on RAM | |
3382 | */ | |
30b771cf TI |
3383 | |
3384 | /** | |
3385 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3386 | * @substream: PCM substream | |
3387 | * @area: VMA | |
3388 | * | |
3389 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3390 | * this function is invoked implicitly. | |
3391 | */ | |
18a2b962 TI |
3392 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3393 | struct vm_area_struct *area) | |
1da177e4 | 3394 | { |
314e51b9 | 3395 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3396 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3397 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3398 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3399 | return remap_pfn_range(area, area->vm_start, | |
3400 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3401 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3402 | } | |
a5606f85 | 3403 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3404 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
abe594c2 | 3405 | if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page && |
657b1989 TI |
3406 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) |
3407 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3408 | area, | |
3409 | substream->runtime->dma_area, | |
3410 | substream->runtime->dma_addr, | |
9066ae7f | 3411 | substream->runtime->dma_bytes); |
49d776ff | 3412 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3413 | /* mmap with fault handler */ |
3414 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3415 | return 0; |
3416 | } | |
18a2b962 | 3417 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3418 | |
3419 | /* | |
3420 | * mmap the DMA buffer on I/O memory area | |
3421 | */ | |
3422 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3423 | /** |
3424 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3425 | * @substream: PCM substream | |
3426 | * @area: VMA | |
3427 | * | |
3428 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3429 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3430 | * is supposed to work only on limited architectures. | |
3431 | */ | |
877211f5 TI |
3432 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3433 | struct vm_area_struct *area) | |
1da177e4 | 3434 | { |
3c7f6919 | 3435 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 3436 | |
1da177e4 | 3437 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3438 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3439 | } |
e88e8ae6 | 3440 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); |
1da177e4 LT |
3441 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3442 | ||
3443 | /* | |
3444 | * mmap DMA buffer | |
3445 | */ | |
877211f5 | 3446 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3447 | struct vm_area_struct *area) |
3448 | { | |
877211f5 | 3449 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3450 | long size; |
3451 | unsigned long offset; | |
3452 | size_t dma_bytes; | |
657b1989 | 3453 | int err; |
1da177e4 LT |
3454 | |
3455 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3456 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3457 | return -EINVAL; | |
3458 | } else { | |
3459 | if (!(area->vm_flags & VM_READ)) | |
3460 | return -EINVAL; | |
3461 | } | |
3462 | runtime = substream->runtime; | |
1da177e4 LT |
3463 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3464 | return -EBADFD; | |
3465 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3466 | return -ENXIO; | |
3467 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3468 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3469 | return -EINVAL; | |
3470 | size = area->vm_end - area->vm_start; | |
3471 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3472 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3473 | if ((size_t)size > dma_bytes) | |
3474 | return -EINVAL; | |
3475 | if (offset > dma_bytes - size) | |
3476 | return -EINVAL; | |
3477 | ||
657b1989 TI |
3478 | area->vm_ops = &snd_pcm_vm_ops_data; |
3479 | area->vm_private_data = substream; | |
1da177e4 | 3480 | if (substream->ops->mmap) |
657b1989 | 3481 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3482 | else |
18a2b962 | 3483 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3484 | if (!err) |
3485 | atomic_inc(&substream->mmap_count); | |
3486 | return err; | |
1da177e4 | 3487 | } |
e88e8ae6 TI |
3488 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3489 | ||
1da177e4 LT |
3490 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3491 | { | |
877211f5 TI |
3492 | struct snd_pcm_file * pcm_file; |
3493 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3494 | unsigned long offset; |
3495 | ||
3496 | pcm_file = file->private_data; | |
3497 | substream = pcm_file->substream; | |
7eaa943c TI |
3498 | if (PCM_RUNTIME_CHECK(substream)) |
3499 | return -ENXIO; | |
1da177e4 LT |
3500 | |
3501 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3502 | switch (offset) { | |
3503 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
42f94597 | 3504 | if (!pcm_status_mmap_allowed(pcm_file)) |
1da177e4 LT |
3505 | return -ENXIO; |
3506 | return snd_pcm_mmap_status(substream, file, area); | |
3507 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
b602aa8e | 3508 | if (!pcm_control_mmap_allowed(pcm_file)) |
1da177e4 LT |
3509 | return -ENXIO; |
3510 | return snd_pcm_mmap_control(substream, file, area); | |
3511 | default: | |
3512 | return snd_pcm_mmap_data(substream, file, area); | |
3513 | } | |
3514 | return 0; | |
3515 | } | |
3516 | ||
3517 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3518 | { | |
877211f5 TI |
3519 | struct snd_pcm_file * pcm_file; |
3520 | struct snd_pcm_substream *substream; | |
3521 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3522 | |
3523 | pcm_file = file->private_data; | |
3524 | substream = pcm_file->substream; | |
7eaa943c | 3525 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3526 | return -ENXIO; |
1da177e4 | 3527 | runtime = substream->runtime; |
d05468b7 | 3528 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3529 | } |
3530 | ||
3531 | /* | |
3532 | * ioctl32 compat | |
3533 | */ | |
3534 | #ifdef CONFIG_COMPAT | |
3535 | #include "pcm_compat.c" | |
3536 | #else | |
3537 | #define snd_pcm_ioctl_compat NULL | |
3538 | #endif | |
3539 | ||
3540 | /* | |
3541 | * To be removed helpers to keep binary compatibility | |
3542 | */ | |
3543 | ||
59d48582 | 3544 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3545 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3546 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3547 | ||
877211f5 TI |
3548 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3549 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3550 | { |
3551 | unsigned int i; | |
3552 | ||
3553 | memset(params, 0, sizeof(*params)); | |
3554 | params->flags = oparams->flags; | |
3555 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3556 | params->masks[i].bits[0] = oparams->masks[i]; | |
3557 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3558 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3559 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3560 | params->info = oparams->info; | |
3561 | params->msbits = oparams->msbits; | |
3562 | params->rate_num = oparams->rate_num; | |
3563 | params->rate_den = oparams->rate_den; | |
3564 | params->fifo_size = oparams->fifo_size; | |
3565 | } | |
3566 | ||
877211f5 TI |
3567 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3568 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3569 | { |
3570 | unsigned int i; | |
3571 | ||
3572 | memset(oparams, 0, sizeof(*oparams)); | |
3573 | oparams->flags = params->flags; | |
3574 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3575 | oparams->masks[i] = params->masks[i].bits[0]; | |
3576 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3577 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3578 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3579 | oparams->info = params->info; | |
3580 | oparams->msbits = params->msbits; | |
3581 | oparams->rate_num = params->rate_num; | |
3582 | oparams->rate_den = params->rate_den; | |
3583 | oparams->fifo_size = params->fifo_size; | |
3584 | } | |
3585 | ||
877211f5 TI |
3586 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3587 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3588 | { |
877211f5 TI |
3589 | struct snd_pcm_hw_params *params; |
3590 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3591 | int err; |
3592 | ||
3593 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3594 | if (!params) |
3595 | return -ENOMEM; | |
1da177e4 | 3596 | |
ef44a1ec LZ |
3597 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3598 | if (IS_ERR(oparams)) { | |
3599 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3600 | goto out; |
3601 | } | |
3602 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3603 | err = snd_pcm_hw_refine(substream, params); | |
f74ae15f TS |
3604 | if (err < 0) |
3605 | goto out_old; | |
ef44a1ec | 3606 | |
f74ae15f TS |
3607 | err = fixup_unreferenced_params(substream, params); |
3608 | if (err < 0) | |
3609 | goto out_old; | |
ef44a1ec | 3610 | |
f74ae15f TS |
3611 | snd_pcm_hw_convert_to_old_params(oparams, params); |
3612 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3613 | err = -EFAULT; | |
3614 | out_old: | |
ef44a1ec | 3615 | kfree(oparams); |
1da177e4 LT |
3616 | out: |
3617 | kfree(params); | |
1da177e4 LT |
3618 | return err; |
3619 | } | |
3620 | ||
877211f5 TI |
3621 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3622 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3623 | { |
877211f5 TI |
3624 | struct snd_pcm_hw_params *params; |
3625 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3626 | int err; |
3627 | ||
3628 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3629 | if (!params) |
3630 | return -ENOMEM; | |
3631 | ||
3632 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3633 | if (IS_ERR(oparams)) { | |
3634 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3635 | goto out; |
3636 | } | |
f74ae15f | 3637 | |
1da177e4 LT |
3638 | snd_pcm_hw_convert_from_old_params(params, oparams); |
3639 | err = snd_pcm_hw_params(substream, params); | |
f74ae15f TS |
3640 | if (err < 0) |
3641 | goto out_old; | |
ef44a1ec | 3642 | |
f74ae15f TS |
3643 | snd_pcm_hw_convert_to_old_params(oparams, params); |
3644 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) | |
3645 | err = -EFAULT; | |
3646 | out_old: | |
ef44a1ec | 3647 | kfree(oparams); |
1da177e4 LT |
3648 | out: |
3649 | kfree(params); | |
1da177e4 LT |
3650 | return err; |
3651 | } | |
59d48582 | 3652 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3653 | |
7003609b | 3654 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3655 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3656 | unsigned long addr, | |
3657 | unsigned long len, | |
3658 | unsigned long pgoff, | |
3659 | unsigned long flags) | |
3660 | { | |
3661 | struct snd_pcm_file *pcm_file = file->private_data; | |
3662 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3663 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3664 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3665 | ||
3666 | switch (offset) { | |
3667 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3668 | return (unsigned long)runtime->status; | |
3669 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3670 | return (unsigned long)runtime->control; | |
3671 | default: | |
3672 | return (unsigned long)runtime->dma_area + offset; | |
3673 | } | |
7003609b CC |
3674 | } |
3675 | #else | |
55c63bd2 | 3676 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3677 | #endif |
3678 | ||
1da177e4 LT |
3679 | /* |
3680 | * Register section | |
3681 | */ | |
3682 | ||
9c2e08c5 | 3683 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3684 | { |
2af677fc CL |
3685 | .owner = THIS_MODULE, |
3686 | .write = snd_pcm_write, | |
1c65d986 | 3687 | .write_iter = snd_pcm_writev, |
f87135f5 | 3688 | .open = snd_pcm_playback_open, |
2af677fc | 3689 | .release = snd_pcm_release, |
02f4865f | 3690 | .llseek = no_llseek, |
6448fcba | 3691 | .poll = snd_pcm_poll, |
67616fed | 3692 | .unlocked_ioctl = snd_pcm_ioctl, |
2af677fc CL |
3693 | .compat_ioctl = snd_pcm_ioctl_compat, |
3694 | .mmap = snd_pcm_mmap, | |
3695 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3696 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3697 | }, |
3698 | { | |
2af677fc CL |
3699 | .owner = THIS_MODULE, |
3700 | .read = snd_pcm_read, | |
1c65d986 | 3701 | .read_iter = snd_pcm_readv, |
f87135f5 | 3702 | .open = snd_pcm_capture_open, |
2af677fc | 3703 | .release = snd_pcm_release, |
02f4865f | 3704 | .llseek = no_llseek, |
6448fcba | 3705 | .poll = snd_pcm_poll, |
67616fed | 3706 | .unlocked_ioctl = snd_pcm_ioctl, |
2af677fc CL |
3707 | .compat_ioctl = snd_pcm_ioctl_compat, |
3708 | .mmap = snd_pcm_mmap, | |
3709 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3710 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3711 | } |
3712 | }; |