Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 | 22 | #include <linux/mm.h> |
da155d5b | 23 | #include <linux/module.h> |
1da177e4 LT |
24 | #include <linux/file.h> |
25 | #include <linux/slab.h> | |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
1da177e4 | 27 | #include <linux/time.h> |
e8db0be1 | 28 | #include <linux/pm_qos.h> |
6cbbfe1c | 29 | #include <linux/io.h> |
657b1989 | 30 | #include <linux/dma-mapping.h> |
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/control.h> | |
33 | #include <sound/info.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/timer.h> | |
37 | #include <sound/minors.h> | |
e2e40f2c | 38 | #include <linux/uio.h> |
1da177e4 | 39 | |
2c4842d3 TS |
40 | #include "pcm_local.h" |
41 | ||
37567c55 | 42 | #ifdef CONFIG_SND_DEBUG |
be4e31da TS |
43 | #define CREATE_TRACE_POINTS |
44 | #include "pcm_param_trace.h" | |
37567c55 TS |
45 | #else |
46 | #define trace_hw_mask_param_enabled() 0 | |
47 | #define trace_hw_interval_param_enabled() 0 | |
48 | #define trace_hw_mask_param(substream, type, index, prev, curr) | |
49 | #define trace_hw_interval_param(substream, type, index, prev, curr) | |
50 | #endif | |
be4e31da | 51 | |
1da177e4 LT |
52 | /* |
53 | * Compatibility | |
54 | */ | |
55 | ||
877211f5 | 56 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
57 | unsigned int flags; |
58 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
59 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 60 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
61 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
62 | unsigned int rmask; | |
63 | unsigned int cmask; | |
64 | unsigned int info; | |
65 | unsigned int msbits; | |
66 | unsigned int rate_num; | |
67 | unsigned int rate_den; | |
877211f5 | 68 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
69 | unsigned char reserved[64]; |
70 | }; | |
71 | ||
59d48582 | 72 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
73 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
74 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 75 | |
877211f5 TI |
76 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
77 | struct snd_pcm_hw_params_old __user * _oparams); | |
78 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
79 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 80 | #endif |
f87135f5 | 81 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
82 | |
83 | /* | |
84 | * | |
85 | */ | |
86 | ||
7af142f7 TI |
87 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
88 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 89 | |
67ec1072 TI |
90 | /* Writer in rwsem may block readers even during its waiting in queue, |
91 | * and this may lead to a deadlock when the code path takes read sem | |
92 | * twice (e.g. one in snd_pcm_action_nonatomic() and another in | |
93 | * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to | |
94 | * spin until it gets the lock. | |
95 | */ | |
96 | static inline void down_write_nonblock(struct rw_semaphore *lock) | |
97 | { | |
98 | while (!down_write_trylock(lock)) | |
99 | cond_resched(); | |
100 | } | |
101 | ||
30b771cf TI |
102 | /** |
103 | * snd_pcm_stream_lock - Lock the PCM stream | |
104 | * @substream: PCM substream | |
105 | * | |
106 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
107 | * flag of the given substream. This also takes the global link rw lock | |
108 | * (or rw sem), too, for avoiding the race with linked streams. | |
109 | */ | |
7af142f7 TI |
110 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
111 | { | |
112 | if (substream->pcm->nonatomic) { | |
67756e31 | 113 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); |
7af142f7 TI |
114 | mutex_lock(&substream->self_group.mutex); |
115 | } else { | |
116 | read_lock(&snd_pcm_link_rwlock); | |
117 | spin_lock(&substream->self_group.lock); | |
118 | } | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
121 | ||
30b771cf TI |
122 | /** |
123 | * snd_pcm_stream_lock - Unlock the PCM stream | |
124 | * @substream: PCM substream | |
125 | * | |
126 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
127 | */ | |
7af142f7 TI |
128 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
129 | { | |
130 | if (substream->pcm->nonatomic) { | |
131 | mutex_unlock(&substream->self_group.mutex); | |
132 | up_read(&snd_pcm_link_rwsem); | |
133 | } else { | |
134 | spin_unlock(&substream->self_group.lock); | |
135 | read_unlock(&snd_pcm_link_rwlock); | |
136 | } | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
139 | ||
30b771cf TI |
140 | /** |
141 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
142 | * @substream: PCM substream | |
143 | * | |
144 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
145 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
146 | * as snd_pcm_stream_lock(). | |
147 | */ | |
7af142f7 TI |
148 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
149 | { | |
150 | if (!substream->pcm->nonatomic) | |
151 | local_irq_disable(); | |
152 | snd_pcm_stream_lock(substream); | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
155 | ||
30b771cf TI |
156 | /** |
157 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
158 | * @substream: PCM substream | |
159 | * | |
160 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
161 | */ | |
7af142f7 TI |
162 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
163 | { | |
164 | snd_pcm_stream_unlock(substream); | |
165 | if (!substream->pcm->nonatomic) | |
166 | local_irq_enable(); | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
169 | ||
170 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
171 | { | |
172 | unsigned long flags = 0; | |
173 | if (!substream->pcm->nonatomic) | |
174 | local_irq_save(flags); | |
175 | snd_pcm_stream_lock(substream); | |
176 | return flags; | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
179 | ||
30b771cf TI |
180 | /** |
181 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
182 | * @substream: PCM substream | |
183 | * @flags: irq flags | |
184 | * | |
185 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
186 | */ | |
7af142f7 TI |
187 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
188 | unsigned long flags) | |
189 | { | |
190 | snd_pcm_stream_unlock(substream); | |
191 | if (!substream->pcm->nonatomic) | |
192 | local_irq_restore(flags); | |
193 | } | |
194 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 | 195 | |
877211f5 | 196 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 197 | { |
877211f5 TI |
198 | struct snd_pcm_runtime *runtime; |
199 | struct snd_pcm *pcm = substream->pcm; | |
200 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 201 | |
1da177e4 LT |
202 | memset(info, 0, sizeof(*info)); |
203 | info->card = pcm->card->number; | |
204 | info->device = pcm->device; | |
205 | info->stream = substream->stream; | |
206 | info->subdevice = substream->number; | |
207 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
208 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
209 | info->dev_class = pcm->dev_class; | |
210 | info->dev_subclass = pcm->dev_subclass; | |
211 | info->subdevices_count = pstr->substream_count; | |
212 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
213 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
214 | runtime = substream->runtime; | |
215 | /* AB: FIXME!!! This is definitely nonsense */ | |
216 | if (runtime) { | |
217 | info->sync = runtime->sync; | |
218 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
219 | } | |
220 | return 0; | |
221 | } | |
222 | ||
877211f5 TI |
223 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
224 | struct snd_pcm_info __user * _info) | |
1da177e4 | 225 | { |
877211f5 | 226 | struct snd_pcm_info *info; |
1da177e4 LT |
227 | int err; |
228 | ||
229 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
230 | if (! info) | |
231 | return -ENOMEM; | |
232 | err = snd_pcm_info(substream, info); | |
233 | if (err >= 0) { | |
234 | if (copy_to_user(_info, info, sizeof(*info))) | |
235 | err = -EFAULT; | |
236 | } | |
237 | kfree(info); | |
238 | return err; | |
239 | } | |
240 | ||
63825f3a TI |
241 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
242 | { | |
243 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
244 | return false; | |
245 | /* check architectures that return -EINVAL from dma_mmap_coherent() */ | |
246 | /* FIXME: this should be some global flag */ | |
247 | #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ | |
248 | defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) | |
249 | if (!substream->ops->mmap && | |
250 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
251 | return false; | |
252 | #endif | |
253 | return true; | |
254 | } | |
255 | ||
561e1cad TS |
256 | static int constrain_mask_params(struct snd_pcm_substream *substream, |
257 | struct snd_pcm_hw_params *params) | |
258 | { | |
259 | struct snd_pcm_hw_constraints *constrs = | |
260 | &substream->runtime->hw_constraints; | |
261 | struct snd_mask *m; | |
262 | unsigned int k; | |
263 | struct snd_mask old_mask; | |
264 | int changed; | |
265 | ||
266 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
267 | m = hw_param_mask(params, k); | |
268 | if (snd_mask_empty(m)) | |
269 | return -EINVAL; | |
270 | if (!(params->rmask & (1 << k))) | |
271 | continue; | |
272 | ||
273 | if (trace_hw_mask_param_enabled()) | |
274 | old_mask = *m; | |
275 | ||
276 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
277 | ||
278 | trace_hw_mask_param(substream, k, 0, &old_mask, m); | |
279 | ||
280 | if (changed) | |
281 | params->cmask |= 1 << k; | |
282 | if (changed < 0) | |
283 | return changed; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
3432fa04 TS |
289 | static int constrain_interval_params(struct snd_pcm_substream *substream, |
290 | struct snd_pcm_hw_params *params) | |
291 | { | |
292 | struct snd_pcm_hw_constraints *constrs = | |
293 | &substream->runtime->hw_constraints; | |
294 | struct snd_interval *i; | |
295 | unsigned int k; | |
296 | struct snd_interval old_interval; | |
297 | int changed; | |
298 | ||
299 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
300 | i = hw_param_interval(params, k); | |
301 | if (snd_interval_empty(i)) | |
302 | return -EINVAL; | |
303 | if (!(params->rmask & (1 << k))) | |
304 | continue; | |
305 | ||
306 | if (trace_hw_interval_param_enabled()) | |
307 | old_interval = *i; | |
308 | ||
309 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
310 | ||
311 | trace_hw_interval_param(substream, k, 0, &old_interval, i); | |
312 | ||
313 | if (changed) | |
314 | params->cmask |= 1 << k; | |
315 | if (changed < 0) | |
316 | return changed; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
9cc07f55 TS |
322 | static int constrain_params_by_rules(struct snd_pcm_substream *substream, |
323 | struct snd_pcm_hw_params *params) | |
1da177e4 | 324 | { |
9cc07f55 TS |
325 | struct snd_pcm_hw_constraints *constrs = |
326 | &substream->runtime->hw_constraints; | |
1da177e4 | 327 | unsigned int k; |
1da177e4 LT |
328 | unsigned int rstamps[constrs->rules_num]; |
329 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
330 | unsigned int stamp = 2; | |
9cc07f55 TS |
331 | struct snd_mask old_mask; |
332 | struct snd_interval old_interval; | |
333 | int again; | |
334 | int changed; | |
1da177e4 LT |
335 | |
336 | for (k = 0; k < constrs->rules_num; k++) | |
337 | rstamps[k] = 0; | |
9cc07f55 | 338 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) |
1da177e4 | 339 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; |
0d4e3999 TS |
340 | retry: |
341 | again = 0; | |
342 | for (k = 0; k < constrs->rules_num; k++) { | |
343 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; | |
344 | unsigned int d; | |
0d4e3999 TS |
345 | if (r->cond && !(r->cond & params->flags)) |
346 | continue; | |
347 | for (d = 0; r->deps[d] >= 0; d++) { | |
d656b4a6 | 348 | if (vstamps[r->deps[d]] > rstamps[k]) |
0d4e3999 | 349 | break; |
0d4e3999 | 350 | } |
d656b4a6 | 351 | if (r->deps[d] < 0) |
0d4e3999 | 352 | continue; |
be4e31da | 353 | |
0d4e3999 TS |
354 | if (trace_hw_mask_param_enabled()) { |
355 | if (hw_is_mask(r->var)) | |
356 | old_mask = *hw_param_mask(params, r->var); | |
357 | } | |
358 | if (trace_hw_interval_param_enabled()) { | |
359 | if (hw_is_interval(r->var)) | |
360 | old_interval = *hw_param_interval(params, r->var); | |
361 | } | |
c6706de0 | 362 | |
0d4e3999 | 363 | changed = r->func(params, r); |
c6706de0 | 364 | |
0d4e3999 TS |
365 | if (hw_is_mask(r->var)) { |
366 | trace_hw_mask_param(substream, r->var, k + 1, | |
367 | &old_mask, hw_param_mask(params, r->var)); | |
368 | } | |
369 | if (hw_is_interval(r->var)) { | |
370 | trace_hw_interval_param(substream, r->var, k + 1, | |
371 | &old_interval, hw_param_interval(params, r->var)); | |
372 | } | |
c6706de0 | 373 | |
0d4e3999 TS |
374 | rstamps[k] = stamp; |
375 | if (changed && r->var >= 0) { | |
376 | params->cmask |= (1 << r->var); | |
377 | vstamps[r->var] = stamp; | |
378 | again = 1; | |
1da177e4 | 379 | } |
0d4e3999 TS |
380 | if (changed < 0) |
381 | return changed; | |
382 | stamp++; | |
383 | } | |
384 | ||
385 | if (again) | |
386 | goto retry; | |
9cc07f55 TS |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
391 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, | |
392 | struct snd_pcm_hw_params *params) | |
393 | { | |
394 | struct snd_pcm_hardware *hw; | |
395 | struct snd_interval *i = NULL; | |
396 | struct snd_mask *m = NULL; | |
397 | int err; | |
398 | ||
399 | params->info = 0; | |
400 | params->fifo_size = 0; | |
401 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
402 | params->msbits = 0; | |
403 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
404 | params->rate_num = 0; | |
405 | params->rate_den = 0; | |
406 | } | |
407 | ||
408 | err = constrain_mask_params(substream, params); | |
409 | if (err < 0) | |
410 | return err; | |
411 | ||
412 | err = constrain_interval_params(substream, params); | |
413 | if (err < 0) | |
414 | return err; | |
415 | ||
416 | err = constrain_params_by_rules(substream, params); | |
417 | if (err < 0) | |
418 | return err; | |
419 | ||
1da177e4 LT |
420 | if (!params->msbits) { |
421 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
422 | if (snd_interval_single(i)) | |
423 | params->msbits = snd_interval_value(i); | |
424 | } | |
425 | ||
426 | if (!params->rate_den) { | |
427 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
428 | if (snd_interval_single(i)) { | |
429 | params->rate_num = snd_interval_value(i); | |
430 | params->rate_den = 1; | |
431 | } | |
432 | } | |
433 | ||
434 | hw = &substream->runtime->hw; | |
63825f3a | 435 | if (!params->info) { |
48d88297 LY |
436 | params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | |
437 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
438 | if (!hw_support_mmap(substream)) |
439 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
440 | SNDRV_PCM_INFO_MMAP_VALID); | |
441 | } | |
8bea869c | 442 | if (!params->fifo_size) { |
3be522a9 JK |
443 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
444 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
445 | if (snd_mask_min(m) == snd_mask_max(m) && | |
446 | snd_interval_min(i) == snd_interval_max(i)) { | |
9cc07f55 | 447 | err = substream->ops->ioctl(substream, |
8bea869c | 448 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); |
9cc07f55 TS |
449 | if (err < 0) |
450 | return err; | |
8bea869c JK |
451 | } |
452 | } | |
1da177e4 LT |
453 | params->rmask = 0; |
454 | return 0; | |
455 | } | |
456 | ||
e88e8ae6 TI |
457 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
458 | ||
877211f5 TI |
459 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
460 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 461 | { |
877211f5 | 462 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
463 | int err; |
464 | ||
ef44a1ec LZ |
465 | params = memdup_user(_params, sizeof(*params)); |
466 | if (IS_ERR(params)) | |
467 | return PTR_ERR(params); | |
468 | ||
1da177e4 LT |
469 | err = snd_pcm_hw_refine(substream, params); |
470 | if (copy_to_user(_params, params, sizeof(*params))) { | |
471 | if (!err) | |
472 | err = -EFAULT; | |
473 | } | |
ef44a1ec | 474 | |
1da177e4 LT |
475 | kfree(params); |
476 | return err; | |
477 | } | |
478 | ||
9442e691 TI |
479 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
480 | { | |
481 | int usecs; | |
482 | ||
483 | if (! runtime->rate) | |
484 | return -1; /* invalid */ | |
485 | ||
486 | /* take 75% of period time as the deadline */ | |
487 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
488 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
489 | runtime->rate; | |
490 | ||
491 | return usecs; | |
492 | } | |
493 | ||
9b0573c0 TI |
494 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
495 | { | |
496 | snd_pcm_stream_lock_irq(substream); | |
497 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
498 | substream->runtime->status->state = state; | |
499 | snd_pcm_stream_unlock_irq(substream); | |
500 | } | |
501 | ||
90bbaf66 JY |
502 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
503 | int event) | |
504 | { | |
505 | #ifdef CONFIG_SND_PCM_TIMER | |
506 | if (substream->timer) | |
507 | snd_timer_notify(substream->timer, event, | |
508 | &substream->runtime->trigger_tstamp); | |
509 | #endif | |
510 | } | |
511 | ||
877211f5 TI |
512 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
513 | struct snd_pcm_hw_params *params) | |
1da177e4 | 514 | { |
877211f5 | 515 | struct snd_pcm_runtime *runtime; |
9442e691 | 516 | int err, usecs; |
1da177e4 LT |
517 | unsigned int bits; |
518 | snd_pcm_uframes_t frames; | |
519 | ||
7eaa943c TI |
520 | if (PCM_RUNTIME_CHECK(substream)) |
521 | return -ENXIO; | |
1da177e4 | 522 | runtime = substream->runtime; |
1da177e4 LT |
523 | snd_pcm_stream_lock_irq(substream); |
524 | switch (runtime->status->state) { | |
525 | case SNDRV_PCM_STATE_OPEN: | |
526 | case SNDRV_PCM_STATE_SETUP: | |
527 | case SNDRV_PCM_STATE_PREPARED: | |
528 | break; | |
529 | default: | |
530 | snd_pcm_stream_unlock_irq(substream); | |
531 | return -EBADFD; | |
532 | } | |
533 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 534 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
535 | if (!substream->oss.oss) |
536 | #endif | |
9c323fcb | 537 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
538 | return -EBADFD; |
539 | ||
540 | params->rmask = ~0U; | |
541 | err = snd_pcm_hw_refine(substream, params); | |
542 | if (err < 0) | |
543 | goto _error; | |
544 | ||
545 | err = snd_pcm_hw_params_choose(substream, params); | |
546 | if (err < 0) | |
547 | goto _error; | |
548 | ||
549 | if (substream->ops->hw_params != NULL) { | |
550 | err = substream->ops->hw_params(substream, params); | |
551 | if (err < 0) | |
552 | goto _error; | |
553 | } | |
554 | ||
555 | runtime->access = params_access(params); | |
556 | runtime->format = params_format(params); | |
557 | runtime->subformat = params_subformat(params); | |
558 | runtime->channels = params_channels(params); | |
559 | runtime->rate = params_rate(params); | |
560 | runtime->period_size = params_period_size(params); | |
561 | runtime->periods = params_periods(params); | |
562 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
563 | runtime->info = params->info; |
564 | runtime->rate_num = params->rate_num; | |
565 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
566 | runtime->no_period_wakeup = |
567 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
568 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
569 | |
570 | bits = snd_pcm_format_physical_width(runtime->format); | |
571 | runtime->sample_bits = bits; | |
572 | bits *= runtime->channels; | |
573 | runtime->frame_bits = bits; | |
574 | frames = 1; | |
575 | while (bits % 8 != 0) { | |
576 | bits *= 2; | |
577 | frames *= 2; | |
578 | } | |
579 | runtime->byte_align = bits / 8; | |
580 | runtime->min_align = frames; | |
581 | ||
582 | /* Default sw params */ | |
583 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
584 | runtime->period_step = 1; | |
1da177e4 | 585 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
586 | runtime->start_threshold = 1; |
587 | runtime->stop_threshold = runtime->buffer_size; | |
588 | runtime->silence_threshold = 0; | |
589 | runtime->silence_size = 0; | |
ead4046b CL |
590 | runtime->boundary = runtime->buffer_size; |
591 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
592 | runtime->boundary *= 2; | |
1da177e4 LT |
593 | |
594 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 595 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 596 | |
82f68251 JB |
597 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
598 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 599 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
600 | pm_qos_add_request(&substream->latency_pm_qos_req, |
601 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
602 | return 0; |
603 | _error: | |
25985edc | 604 | /* hardware might be unusable from this time, |
1da177e4 LT |
605 | so we force application to retry to set |
606 | the correct hardware parameter settings */ | |
9b0573c0 | 607 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
608 | if (substream->ops->hw_free != NULL) |
609 | substream->ops->hw_free(substream); | |
610 | return err; | |
611 | } | |
612 | ||
877211f5 TI |
613 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
614 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 615 | { |
877211f5 | 616 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
617 | int err; |
618 | ||
ef44a1ec LZ |
619 | params = memdup_user(_params, sizeof(*params)); |
620 | if (IS_ERR(params)) | |
621 | return PTR_ERR(params); | |
622 | ||
1da177e4 LT |
623 | err = snd_pcm_hw_params(substream, params); |
624 | if (copy_to_user(_params, params, sizeof(*params))) { | |
625 | if (!err) | |
626 | err = -EFAULT; | |
627 | } | |
ef44a1ec | 628 | |
1da177e4 LT |
629 | kfree(params); |
630 | return err; | |
631 | } | |
632 | ||
877211f5 | 633 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 634 | { |
877211f5 | 635 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
636 | int result = 0; |
637 | ||
7eaa943c TI |
638 | if (PCM_RUNTIME_CHECK(substream)) |
639 | return -ENXIO; | |
1da177e4 | 640 | runtime = substream->runtime; |
1da177e4 LT |
641 | snd_pcm_stream_lock_irq(substream); |
642 | switch (runtime->status->state) { | |
643 | case SNDRV_PCM_STATE_SETUP: | |
644 | case SNDRV_PCM_STATE_PREPARED: | |
645 | break; | |
646 | default: | |
647 | snd_pcm_stream_unlock_irq(substream); | |
648 | return -EBADFD; | |
649 | } | |
650 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 651 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
652 | return -EBADFD; |
653 | if (substream->ops->hw_free) | |
654 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 655 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 656 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
657 | return result; |
658 | } | |
659 | ||
877211f5 TI |
660 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
661 | struct snd_pcm_sw_params *params) | |
1da177e4 | 662 | { |
877211f5 | 663 | struct snd_pcm_runtime *runtime; |
1250932e | 664 | int err; |
1da177e4 | 665 | |
7eaa943c TI |
666 | if (PCM_RUNTIME_CHECK(substream)) |
667 | return -ENXIO; | |
1da177e4 | 668 | runtime = substream->runtime; |
1da177e4 LT |
669 | snd_pcm_stream_lock_irq(substream); |
670 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
671 | snd_pcm_stream_unlock_irq(substream); | |
672 | return -EBADFD; | |
673 | } | |
674 | snd_pcm_stream_unlock_irq(substream); | |
675 | ||
145d92e7 DC |
676 | if (params->tstamp_mode < 0 || |
677 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 678 | return -EINVAL; |
58900810 TI |
679 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
680 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 681 | return -EINVAL; |
1da177e4 LT |
682 | if (params->avail_min == 0) |
683 | return -EINVAL; | |
1da177e4 LT |
684 | if (params->silence_size >= runtime->boundary) { |
685 | if (params->silence_threshold != 0) | |
686 | return -EINVAL; | |
687 | } else { | |
688 | if (params->silence_size > params->silence_threshold) | |
689 | return -EINVAL; | |
690 | if (params->silence_threshold > runtime->buffer_size) | |
691 | return -EINVAL; | |
692 | } | |
1250932e | 693 | err = 0; |
1da177e4 LT |
694 | snd_pcm_stream_lock_irq(substream); |
695 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
696 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
697 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
698 | runtime->period_step = params->period_step; |
699 | runtime->control->avail_min = params->avail_min; | |
700 | runtime->start_threshold = params->start_threshold; | |
701 | runtime->stop_threshold = params->stop_threshold; | |
702 | runtime->silence_threshold = params->silence_threshold; | |
703 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
704 | params->boundary = runtime->boundary; |
705 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
706 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
707 | runtime->silence_size > 0) | |
708 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 709 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
710 | } |
711 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 712 | return err; |
1da177e4 LT |
713 | } |
714 | ||
877211f5 TI |
715 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
716 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 717 | { |
877211f5 | 718 | struct snd_pcm_sw_params params; |
1da177e4 LT |
719 | int err; |
720 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
721 | return -EFAULT; | |
722 | err = snd_pcm_sw_params(substream, ¶ms); | |
723 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
724 | return -EFAULT; | |
725 | return err; | |
726 | } | |
727 | ||
877211f5 TI |
728 | int snd_pcm_status(struct snd_pcm_substream *substream, |
729 | struct snd_pcm_status *status) | |
1da177e4 | 730 | { |
877211f5 | 731 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
732 | |
733 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
734 | |
735 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
736 | &runtime->audio_tstamp_config); | |
737 | ||
738 | /* backwards compatible behavior */ | |
739 | if (runtime->audio_tstamp_config.type_requested == | |
740 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
741 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
742 | runtime->audio_tstamp_config.type_requested = | |
743 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
744 | else | |
745 | runtime->audio_tstamp_config.type_requested = | |
746 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
747 | runtime->audio_tstamp_report.valid = 0; | |
748 | } else | |
749 | runtime->audio_tstamp_report.valid = 1; | |
750 | ||
1da177e4 LT |
751 | status->state = runtime->status->state; |
752 | status->suspended_state = runtime->status->suspended_state; | |
753 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
754 | goto _end; | |
755 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 756 | if (snd_pcm_running(substream)) { |
1da177e4 | 757 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
758 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
759 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 760 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
761 | status->audio_tstamp = |
762 | runtime->status->audio_tstamp; | |
3179f620 PLB |
763 | if (runtime->audio_tstamp_report.valid == 1) |
764 | /* backwards compatibility, no report provided in COMPAT mode */ | |
765 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
766 | &status->audio_tstamp_accuracy, | |
767 | &runtime->audio_tstamp_report); | |
768 | ||
8c121586 JK |
769 | goto _tstamp_end; |
770 | } | |
0d59b814 PLB |
771 | } else { |
772 | /* get tstamp only in fallback mode and only if enabled */ | |
773 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
774 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 775 | } |
8c121586 | 776 | _tstamp_end: |
1da177e4 LT |
777 | status->appl_ptr = runtime->control->appl_ptr; |
778 | status->hw_ptr = runtime->status->hw_ptr; | |
779 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
780 | status->avail = snd_pcm_playback_avail(runtime); | |
781 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 782 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 783 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
784 | status->delay += runtime->delay; |
785 | } else | |
1da177e4 LT |
786 | status->delay = 0; |
787 | } else { | |
788 | status->avail = snd_pcm_capture_avail(runtime); | |
789 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 790 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
791 | else |
792 | status->delay = 0; | |
793 | } | |
794 | status->avail_max = runtime->avail_max; | |
795 | status->overrange = runtime->overrange; | |
796 | runtime->avail_max = 0; | |
797 | runtime->overrange = 0; | |
798 | _end: | |
799 | snd_pcm_stream_unlock_irq(substream); | |
800 | return 0; | |
801 | } | |
802 | ||
877211f5 | 803 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
804 | struct snd_pcm_status __user * _status, |
805 | bool ext) | |
1da177e4 | 806 | { |
877211f5 | 807 | struct snd_pcm_status status; |
1da177e4 | 808 | int res; |
38ca2a4d | 809 | |
1da177e4 | 810 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
811 | /* |
812 | * with extension, parameters are read/write, | |
813 | * get audio_tstamp_data from user, | |
814 | * ignore rest of status structure | |
815 | */ | |
816 | if (ext && get_user(status.audio_tstamp_data, | |
817 | (u32 __user *)(&_status->audio_tstamp_data))) | |
818 | return -EFAULT; | |
1da177e4 LT |
819 | res = snd_pcm_status(substream, &status); |
820 | if (res < 0) | |
821 | return res; | |
822 | if (copy_to_user(_status, &status, sizeof(status))) | |
823 | return -EFAULT; | |
824 | return 0; | |
825 | } | |
826 | ||
877211f5 TI |
827 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
828 | struct snd_pcm_channel_info * info) | |
1da177e4 | 829 | { |
877211f5 | 830 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
831 | unsigned int channel; |
832 | ||
1da177e4 LT |
833 | channel = info->channel; |
834 | runtime = substream->runtime; | |
835 | snd_pcm_stream_lock_irq(substream); | |
836 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
837 | snd_pcm_stream_unlock_irq(substream); | |
838 | return -EBADFD; | |
839 | } | |
840 | snd_pcm_stream_unlock_irq(substream); | |
841 | if (channel >= runtime->channels) | |
842 | return -EINVAL; | |
843 | memset(info, 0, sizeof(*info)); | |
844 | info->channel = channel; | |
845 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
846 | } | |
847 | ||
877211f5 TI |
848 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
849 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 850 | { |
877211f5 | 851 | struct snd_pcm_channel_info info; |
1da177e4 LT |
852 | int res; |
853 | ||
854 | if (copy_from_user(&info, _info, sizeof(info))) | |
855 | return -EFAULT; | |
856 | res = snd_pcm_channel_info(substream, &info); | |
857 | if (res < 0) | |
858 | return res; | |
859 | if (copy_to_user(_info, &info, sizeof(info))) | |
860 | return -EFAULT; | |
861 | return 0; | |
862 | } | |
863 | ||
877211f5 | 864 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 865 | { |
877211f5 | 866 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
867 | if (runtime->trigger_master == NULL) |
868 | return; | |
869 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
870 | if (!runtime->trigger_tstamp_latched) |
871 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
872 | } else { |
873 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
874 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
875 | } | |
876 | runtime->trigger_master = NULL; | |
877 | } | |
878 | ||
879 | struct action_ops { | |
877211f5 TI |
880 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
881 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
882 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
883 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
884 | }; |
885 | ||
886 | /* | |
887 | * this functions is core for handling of linked stream | |
888 | * Note: the stream state might be changed also on failure | |
889 | * Note2: call with calling stream lock + link lock | |
890 | */ | |
b17154cf | 891 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 892 | struct snd_pcm_substream *substream, |
1da177e4 LT |
893 | int state, int do_lock) |
894 | { | |
877211f5 TI |
895 | struct snd_pcm_substream *s = NULL; |
896 | struct snd_pcm_substream *s1; | |
dde1c652 | 897 | int res = 0, depth = 1; |
1da177e4 | 898 | |
ef991b95 | 899 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
900 | if (do_lock && s != substream) { |
901 | if (s->pcm->nonatomic) | |
dde1c652 | 902 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 903 | else |
dde1c652 TI |
904 | spin_lock_nested(&s->self_group.lock, depth); |
905 | depth++; | |
257f8cce | 906 | } |
1da177e4 LT |
907 | res = ops->pre_action(s, state); |
908 | if (res < 0) | |
909 | goto _unlock; | |
910 | } | |
ef991b95 | 911 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
912 | res = ops->do_action(s, state); |
913 | if (res < 0) { | |
914 | if (ops->undo_action) { | |
ef991b95 | 915 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
916 | if (s1 == s) /* failed stream */ |
917 | break; | |
918 | ops->undo_action(s1, state); | |
919 | } | |
920 | } | |
921 | s = NULL; /* unlock all */ | |
922 | goto _unlock; | |
923 | } | |
924 | } | |
ef991b95 | 925 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
926 | ops->post_action(s, state); |
927 | } | |
928 | _unlock: | |
929 | if (do_lock) { | |
930 | /* unlock streams */ | |
ef991b95 | 931 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 932 | if (s1 != substream) { |
811deede | 933 | if (s1->pcm->nonatomic) |
257f8cce TI |
934 | mutex_unlock(&s1->self_group.mutex); |
935 | else | |
936 | spin_unlock(&s1->self_group.lock); | |
937 | } | |
1da177e4 LT |
938 | if (s1 == s) /* end */ |
939 | break; | |
940 | } | |
941 | } | |
942 | return res; | |
943 | } | |
944 | ||
945 | /* | |
946 | * Note: call with stream lock | |
947 | */ | |
b17154cf | 948 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 949 | struct snd_pcm_substream *substream, |
1da177e4 LT |
950 | int state) |
951 | { | |
952 | int res; | |
953 | ||
954 | res = ops->pre_action(substream, state); | |
955 | if (res < 0) | |
956 | return res; | |
957 | res = ops->do_action(substream, state); | |
958 | if (res == 0) | |
959 | ops->post_action(substream, state); | |
960 | else if (ops->undo_action) | |
961 | ops->undo_action(substream, state); | |
962 | return res; | |
963 | } | |
964 | ||
aa8edd8c TI |
965 | /* |
966 | * Note: call with stream lock | |
967 | */ | |
b17154cf | 968 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
969 | struct snd_pcm_substream *substream, |
970 | int state) | |
257f8cce TI |
971 | { |
972 | int res; | |
973 | ||
aa8edd8c TI |
974 | if (!snd_pcm_stream_linked(substream)) |
975 | return snd_pcm_action_single(ops, substream, state); | |
976 | ||
977 | if (substream->pcm->nonatomic) { | |
257f8cce TI |
978 | if (!mutex_trylock(&substream->group->mutex)) { |
979 | mutex_unlock(&substream->self_group.mutex); | |
980 | mutex_lock(&substream->group->mutex); | |
981 | mutex_lock(&substream->self_group.mutex); | |
982 | } | |
983 | res = snd_pcm_action_group(ops, substream, state, 1); | |
984 | mutex_unlock(&substream->group->mutex); | |
985 | } else { | |
1da177e4 LT |
986 | if (!spin_trylock(&substream->group->lock)) { |
987 | spin_unlock(&substream->self_group.lock); | |
988 | spin_lock(&substream->group->lock); | |
989 | spin_lock(&substream->self_group.lock); | |
990 | } | |
991 | res = snd_pcm_action_group(ops, substream, state, 1); | |
992 | spin_unlock(&substream->group->lock); | |
1da177e4 LT |
993 | } |
994 | return res; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Note: don't use any locks before | |
999 | */ | |
b17154cf | 1000 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 1001 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1002 | int state) |
1003 | { | |
1004 | int res; | |
1005 | ||
e3a4bd5e TI |
1006 | snd_pcm_stream_lock_irq(substream); |
1007 | res = snd_pcm_action(ops, substream, state); | |
1008 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1009 | return res; |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | */ | |
b17154cf | 1014 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1015 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1016 | int state) |
1017 | { | |
1018 | int res; | |
1019 | ||
1020 | down_read(&snd_pcm_link_rwsem); | |
1021 | if (snd_pcm_stream_linked(substream)) | |
1022 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1023 | else | |
1024 | res = snd_pcm_action_single(ops, substream, state); | |
1025 | up_read(&snd_pcm_link_rwsem); | |
1026 | return res; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * start callbacks | |
1031 | */ | |
877211f5 | 1032 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1033 | { |
877211f5 | 1034 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1035 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1036 | return -EBADFD; | |
1037 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1038 | !snd_pcm_playback_data(substream)) | |
1039 | return -EPIPE; | |
2b79d7a6 | 1040 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1041 | runtime->trigger_master = substream; |
1042 | return 0; | |
1043 | } | |
1044 | ||
877211f5 | 1045 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1046 | { |
1047 | if (substream->runtime->trigger_master != substream) | |
1048 | return 0; | |
1049 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1050 | } | |
1051 | ||
877211f5 | 1052 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1053 | { |
1054 | if (substream->runtime->trigger_master == substream) | |
1055 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1056 | } | |
1057 | ||
877211f5 | 1058 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1059 | { |
877211f5 | 1060 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1061 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1062 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1063 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1064 | runtime->rate; | |
1da177e4 LT |
1065 | runtime->status->state = state; |
1066 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1067 | runtime->silence_size > 0) | |
1068 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1069 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1070 | } |
1071 | ||
b17154cf | 1072 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1073 | .pre_action = snd_pcm_pre_start, |
1074 | .do_action = snd_pcm_do_start, | |
1075 | .undo_action = snd_pcm_undo_start, | |
1076 | .post_action = snd_pcm_post_start | |
1077 | }; | |
1078 | ||
1079 | /** | |
1c85cc64 | 1080 | * snd_pcm_start - start all linked streams |
df8db936 | 1081 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1082 | * |
1083 | * Return: Zero if successful, or a negative error code. | |
c2c86a97 | 1084 | * The stream lock must be acquired before calling this function. |
1da177e4 | 1085 | */ |
877211f5 | 1086 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1087 | { |
877211f5 TI |
1088 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1089 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1090 | } |
1091 | ||
c2c86a97 TI |
1092 | /* take the stream lock and start the streams */ |
1093 | static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream) | |
1094 | { | |
1095 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, | |
1096 | SNDRV_PCM_STATE_RUNNING); | |
1097 | } | |
1098 | ||
1da177e4 LT |
1099 | /* |
1100 | * stop callbacks | |
1101 | */ | |
877211f5 | 1102 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1103 | { |
877211f5 | 1104 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1105 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1106 | return -EBADFD; | |
1107 | runtime->trigger_master = substream; | |
1108 | return 0; | |
1109 | } | |
1110 | ||
877211f5 | 1111 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1112 | { |
1113 | if (substream->runtime->trigger_master == substream && | |
1114 | snd_pcm_running(substream)) | |
1115 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1116 | return 0; /* unconditonally stop all substreams */ | |
1117 | } | |
1118 | ||
877211f5 | 1119 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1120 | { |
877211f5 | 1121 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1122 | if (runtime->status->state != state) { |
1123 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1124 | runtime->status->state = state; |
90bbaf66 | 1125 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1126 | } |
1127 | wake_up(&runtime->sleep); | |
c91a988d | 1128 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1129 | } |
1130 | ||
b17154cf | 1131 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1132 | .pre_action = snd_pcm_pre_stop, |
1133 | .do_action = snd_pcm_do_stop, | |
1134 | .post_action = snd_pcm_post_stop | |
1135 | }; | |
1136 | ||
1137 | /** | |
1c85cc64 | 1138 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1139 | * @substream: the PCM substream instance |
1140 | * @state: PCM state after stopping the stream | |
1da177e4 | 1141 | * |
1c85cc64 | 1142 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1143 | * |
0a11458c | 1144 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1145 | */ |
fea952e5 | 1146 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1147 | { |
1148 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1149 | } | |
1150 | ||
e88e8ae6 TI |
1151 | EXPORT_SYMBOL(snd_pcm_stop); |
1152 | ||
1da177e4 | 1153 | /** |
1c85cc64 | 1154 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1155 | * @substream: the PCM substream |
1da177e4 | 1156 | * |
1c85cc64 | 1157 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1158 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1159 | * |
1160 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1161 | */ |
877211f5 | 1162 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1163 | { |
877211f5 TI |
1164 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1165 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1166 | } |
1167 | ||
1fb8510c TI |
1168 | /** |
1169 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1170 | * @substream: the PCM substream instance | |
1fb8510c TI |
1171 | * |
1172 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1173 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1174 | * | |
1175 | * Return: Zero if successful, or a negative error code. | |
1176 | */ | |
1177 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1178 | { | |
1179 | unsigned long flags; | |
1180 | int ret = 0; | |
1181 | ||
1182 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1183 | if (snd_pcm_running(substream)) | |
1184 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1185 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1186 | return ret; | |
1187 | } | |
1188 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1189 | ||
1da177e4 LT |
1190 | /* |
1191 | * pause callbacks | |
1192 | */ | |
877211f5 | 1193 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1194 | { |
877211f5 | 1195 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1196 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1197 | return -ENOSYS; | |
1198 | if (push) { | |
1199 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1200 | return -EBADFD; | |
1201 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1202 | return -EBADFD; | |
1203 | runtime->trigger_master = substream; | |
1204 | return 0; | |
1205 | } | |
1206 | ||
877211f5 | 1207 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1208 | { |
1209 | if (substream->runtime->trigger_master != substream) | |
1210 | return 0; | |
56385a12 JK |
1211 | /* some drivers might use hw_ptr to recover from the pause - |
1212 | update the hw_ptr now */ | |
1213 | if (push) | |
1214 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1215 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1216 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1217 | * delta, effectively to skip the check once. |
1218 | */ | |
1219 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1220 | return substream->ops->trigger(substream, |
1221 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1222 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1223 | } | |
1224 | ||
877211f5 | 1225 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1226 | { |
1227 | if (substream->runtime->trigger_master == substream) | |
1228 | substream->ops->trigger(substream, | |
1229 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1230 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1231 | } | |
1232 | ||
877211f5 | 1233 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1234 | { |
877211f5 | 1235 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1236 | snd_pcm_trigger_tstamp(substream); |
1237 | if (push) { | |
1238 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1239 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1240 | wake_up(&runtime->sleep); |
c91a988d | 1241 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1242 | } else { |
1243 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1244 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1245 | } |
1246 | } | |
1247 | ||
b17154cf | 1248 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1249 | .pre_action = snd_pcm_pre_pause, |
1250 | .do_action = snd_pcm_do_pause, | |
1251 | .undo_action = snd_pcm_undo_pause, | |
1252 | .post_action = snd_pcm_post_pause | |
1253 | }; | |
1254 | ||
1255 | /* | |
1256 | * Push/release the pause for all linked streams. | |
1257 | */ | |
877211f5 | 1258 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1259 | { |
1260 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1261 | } | |
1262 | ||
1263 | #ifdef CONFIG_PM | |
1264 | /* suspend */ | |
1265 | ||
877211f5 | 1266 | static int snd_pcm_pre_suspend(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_SUSPENDED) |
1270 | return -EBUSY; | |
1271 | runtime->trigger_master = substream; | |
1272 | return 0; | |
1273 | } | |
1274 | ||
877211f5 | 1275 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1276 | { |
877211f5 | 1277 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1278 | if (runtime->trigger_master != substream) |
1279 | return 0; | |
1280 | if (! snd_pcm_running(substream)) | |
1281 | return 0; | |
1282 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1283 | return 0; /* suspend unconditionally */ | |
1284 | } | |
1285 | ||
877211f5 | 1286 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1287 | { |
877211f5 | 1288 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1289 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1290 | runtime->status->suspended_state = runtime->status->state; |
1291 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1292 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1293 | wake_up(&runtime->sleep); |
c91a988d | 1294 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1295 | } |
1296 | ||
b17154cf | 1297 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1298 | .pre_action = snd_pcm_pre_suspend, |
1299 | .do_action = snd_pcm_do_suspend, | |
1300 | .post_action = snd_pcm_post_suspend | |
1301 | }; | |
1302 | ||
1303 | /** | |
1c85cc64 | 1304 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1305 | * @substream: the PCM substream |
1da177e4 | 1306 | * |
1da177e4 | 1307 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1308 | * |
1309 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1310 | * code. | |
1da177e4 | 1311 | */ |
877211f5 | 1312 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1313 | { |
1314 | int err; | |
1315 | unsigned long flags; | |
1316 | ||
603bf524 TI |
1317 | if (! substream) |
1318 | return 0; | |
1319 | ||
1da177e4 LT |
1320 | snd_pcm_stream_lock_irqsave(substream, flags); |
1321 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1322 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1323 | return err; | |
1324 | } | |
1325 | ||
e88e8ae6 TI |
1326 | EXPORT_SYMBOL(snd_pcm_suspend); |
1327 | ||
1da177e4 | 1328 | /** |
1c85cc64 | 1329 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1330 | * @pcm: the PCM instance |
1da177e4 | 1331 | * |
1da177e4 | 1332 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1333 | * |
1334 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1335 | */ |
877211f5 | 1336 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1337 | { |
877211f5 | 1338 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1339 | int stream, err = 0; |
1340 | ||
603bf524 TI |
1341 | if (! pcm) |
1342 | return 0; | |
1343 | ||
1da177e4 | 1344 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1345 | for (substream = pcm->streams[stream].substream; |
1346 | substream; substream = substream->next) { | |
1da177e4 LT |
1347 | /* FIXME: the open/close code should lock this as well */ |
1348 | if (substream->runtime == NULL) | |
1349 | continue; | |
1350 | err = snd_pcm_suspend(substream); | |
1351 | if (err < 0 && err != -EBUSY) | |
1352 | return err; | |
1353 | } | |
1354 | } | |
1355 | return 0; | |
1356 | } | |
1357 | ||
e88e8ae6 TI |
1358 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1359 | ||
1da177e4 LT |
1360 | /* resume */ |
1361 | ||
877211f5 | 1362 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1363 | { |
877211f5 | 1364 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1365 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1366 | return -ENOSYS; | |
1367 | runtime->trigger_master = substream; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
877211f5 | 1371 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1372 | { |
877211f5 | 1373 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1374 | if (runtime->trigger_master != substream) |
1375 | return 0; | |
1376 | /* DMA not running previously? */ | |
1377 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1378 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1379 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1380 | return 0; | |
1381 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1382 | } | |
1383 | ||
877211f5 | 1384 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1385 | { |
1386 | if (substream->runtime->trigger_master == substream && | |
1387 | snd_pcm_running(substream)) | |
1388 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1389 | } | |
1390 | ||
877211f5 | 1391 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1392 | { |
877211f5 | 1393 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1394 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1395 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1396 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1397 | } |
1398 | ||
b17154cf | 1399 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1400 | .pre_action = snd_pcm_pre_resume, |
1401 | .do_action = snd_pcm_do_resume, | |
1402 | .undo_action = snd_pcm_undo_resume, | |
1403 | .post_action = snd_pcm_post_resume | |
1404 | }; | |
1405 | ||
877211f5 | 1406 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1407 | { |
877211f5 | 1408 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1409 | int res; |
1410 | ||
1411 | snd_power_lock(card); | |
cbac4b0c | 1412 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1413 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1414 | snd_power_unlock(card); | |
1415 | return res; | |
1416 | } | |
1417 | ||
1418 | #else | |
1419 | ||
877211f5 | 1420 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1421 | { |
1422 | return -ENOSYS; | |
1423 | } | |
1424 | ||
1425 | #endif /* CONFIG_PM */ | |
1426 | ||
1427 | /* | |
1428 | * xrun ioctl | |
1429 | * | |
1430 | * Change the RUNNING stream(s) to XRUN state. | |
1431 | */ | |
877211f5 | 1432 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1433 | { |
877211f5 TI |
1434 | struct snd_card *card = substream->pcm->card; |
1435 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1436 | int result; |
1437 | ||
1438 | snd_power_lock(card); | |
1439 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1440 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1441 | if (result < 0) |
1442 | goto _unlock; | |
1443 | } | |
1444 | ||
1445 | snd_pcm_stream_lock_irq(substream); | |
1446 | switch (runtime->status->state) { | |
1447 | case SNDRV_PCM_STATE_XRUN: | |
1448 | result = 0; /* already there */ | |
1449 | break; | |
1450 | case SNDRV_PCM_STATE_RUNNING: | |
1451 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1452 | break; | |
1453 | default: | |
1454 | result = -EBADFD; | |
1455 | } | |
1456 | snd_pcm_stream_unlock_irq(substream); | |
1457 | _unlock: | |
1458 | snd_power_unlock(card); | |
1459 | return result; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * reset ioctl | |
1464 | */ | |
877211f5 | 1465 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1466 | { |
877211f5 | 1467 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1468 | switch (runtime->status->state) { |
1469 | case SNDRV_PCM_STATE_RUNNING: | |
1470 | case SNDRV_PCM_STATE_PREPARED: | |
1471 | case SNDRV_PCM_STATE_PAUSED: | |
1472 | case SNDRV_PCM_STATE_SUSPENDED: | |
1473 | return 0; | |
1474 | default: | |
1475 | return -EBADFD; | |
1476 | } | |
1477 | } | |
1478 | ||
877211f5 | 1479 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1480 | { |
877211f5 | 1481 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1482 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1483 | if (err < 0) | |
1484 | return err; | |
1da177e4 | 1485 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1486 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1487 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1488 | runtime->silence_start = runtime->status->hw_ptr; |
1489 | runtime->silence_filled = 0; | |
1490 | return 0; | |
1491 | } | |
1492 | ||
877211f5 | 1493 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1494 | { |
877211f5 | 1495 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1496 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1497 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1498 | runtime->silence_size > 0) | |
1499 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1500 | } | |
1501 | ||
b17154cf | 1502 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1503 | .pre_action = snd_pcm_pre_reset, |
1504 | .do_action = snd_pcm_do_reset, | |
1505 | .post_action = snd_pcm_post_reset | |
1506 | }; | |
1507 | ||
877211f5 | 1508 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1509 | { |
1510 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * prepare ioctl | |
1515 | */ | |
0df63e44 TI |
1516 | /* we use the second argument for updating f_flags */ |
1517 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1518 | int f_flags) | |
1da177e4 | 1519 | { |
877211f5 | 1520 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1521 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1522 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1523 | return -EBADFD; |
1524 | if (snd_pcm_running(substream)) | |
1525 | return -EBUSY; | |
0df63e44 | 1526 | substream->f_flags = f_flags; |
1da177e4 LT |
1527 | return 0; |
1528 | } | |
1529 | ||
877211f5 | 1530 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1531 | { |
1532 | int err; | |
1533 | err = substream->ops->prepare(substream); | |
1534 | if (err < 0) | |
1535 | return err; | |
1536 | return snd_pcm_do_reset(substream, 0); | |
1537 | } | |
1538 | ||
877211f5 | 1539 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1540 | { |
877211f5 | 1541 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1542 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1543 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1544 | } |
1545 | ||
b17154cf | 1546 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1547 | .pre_action = snd_pcm_pre_prepare, |
1548 | .do_action = snd_pcm_do_prepare, | |
1549 | .post_action = snd_pcm_post_prepare | |
1550 | }; | |
1551 | ||
1552 | /** | |
1c85cc64 | 1553 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1554 | * @substream: the PCM substream instance |
0df63e44 | 1555 | * @file: file to refer f_flags |
eb7c06e8 YB |
1556 | * |
1557 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1558 | */ |
0df63e44 TI |
1559 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1560 | struct file *file) | |
1da177e4 LT |
1561 | { |
1562 | int res; | |
877211f5 | 1563 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1564 | int f_flags; |
1565 | ||
1566 | if (file) | |
1567 | f_flags = file->f_flags; | |
1568 | else | |
1569 | f_flags = substream->f_flags; | |
1da177e4 LT |
1570 | |
1571 | snd_power_lock(card); | |
cbac4b0c | 1572 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1573 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1574 | substream, f_flags); | |
1da177e4 LT |
1575 | snd_power_unlock(card); |
1576 | return res; | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | * drain ioctl | |
1581 | */ | |
1582 | ||
877211f5 | 1583 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1584 | { |
4f7c39dc TI |
1585 | struct snd_pcm_runtime *runtime = substream->runtime; |
1586 | switch (runtime->status->state) { | |
1587 | case SNDRV_PCM_STATE_OPEN: | |
1588 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1589 | case SNDRV_PCM_STATE_SUSPENDED: | |
1590 | return -EBADFD; | |
1591 | } | |
1592 | runtime->trigger_master = substream; | |
1da177e4 LT |
1593 | return 0; |
1594 | } | |
1595 | ||
877211f5 | 1596 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1597 | { |
877211f5 | 1598 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1599 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1600 | switch (runtime->status->state) { | |
1601 | case SNDRV_PCM_STATE_PREPARED: | |
1602 | /* start playback stream if possible */ | |
1603 | if (! snd_pcm_playback_empty(substream)) { | |
1604 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1605 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1606 | } else { |
1607 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1608 | } |
1609 | break; | |
1610 | case SNDRV_PCM_STATE_RUNNING: | |
1611 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1612 | break; | |
4f7c39dc TI |
1613 | case SNDRV_PCM_STATE_XRUN: |
1614 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1615 | break; | |
1da177e4 LT |
1616 | default: |
1617 | break; | |
1618 | } | |
1619 | } else { | |
1620 | /* stop running stream */ | |
1621 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1622 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1623 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1624 | snd_pcm_do_stop(substream, new_state); |
1625 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1626 | } |
1627 | } | |
48d88297 LY |
1628 | |
1629 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1630 | runtime->trigger_master == substream && | |
1631 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1632 | return substream->ops->trigger(substream, | |
1633 | SNDRV_PCM_TRIGGER_DRAIN); | |
1634 | ||
1da177e4 LT |
1635 | return 0; |
1636 | } | |
1637 | ||
877211f5 | 1638 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1639 | { |
1640 | } | |
1641 | ||
b17154cf | 1642 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1643 | .pre_action = snd_pcm_pre_drain_init, |
1644 | .do_action = snd_pcm_do_drain_init, | |
1645 | .post_action = snd_pcm_post_drain_init | |
1646 | }; | |
1647 | ||
877211f5 | 1648 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1649 | |
1650 | /* | |
1651 | * Drain the stream(s). | |
1652 | * When the substream is linked, sync until the draining of all playback streams | |
1653 | * is finished. | |
1654 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1655 | * (capture only) state. | |
1656 | */ | |
4cdc115f TI |
1657 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1658 | struct file *file) | |
1da177e4 | 1659 | { |
877211f5 TI |
1660 | struct snd_card *card; |
1661 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1662 | struct snd_pcm_substream *s; |
d3a7dcfe | 1663 | wait_queue_t wait; |
1da177e4 | 1664 | int result = 0; |
4cdc115f | 1665 | int nonblock = 0; |
1da177e4 | 1666 | |
1da177e4 LT |
1667 | card = substream->pcm->card; |
1668 | runtime = substream->runtime; | |
1669 | ||
1670 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1671 | return -EBADFD; | |
1672 | ||
1da177e4 LT |
1673 | snd_power_lock(card); |
1674 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1675 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1676 | if (result < 0) { |
1677 | snd_power_unlock(card); | |
1678 | return result; | |
1679 | } | |
1da177e4 LT |
1680 | } |
1681 | ||
4cdc115f TI |
1682 | if (file) { |
1683 | if (file->f_flags & O_NONBLOCK) | |
1684 | nonblock = 1; | |
1685 | } else if (substream->f_flags & O_NONBLOCK) | |
1686 | nonblock = 1; | |
1687 | ||
21cb2a2e | 1688 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1689 | snd_pcm_stream_lock_irq(substream); |
1690 | /* resume pause */ | |
d3a7dcfe | 1691 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1692 | snd_pcm_pause(substream, 0); |
1693 | ||
1694 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1695 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1696 | if (result < 0) |
1697 | goto unlock; | |
1698 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1699 | if (nonblock) { | |
1700 | result = -EAGAIN; | |
1701 | goto unlock; | |
21cb2a2e | 1702 | } |
1da177e4 LT |
1703 | |
1704 | for (;;) { | |
1705 | long tout; | |
d3a7dcfe | 1706 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1707 | if (signal_pending(current)) { |
1708 | result = -ERESTARTSYS; | |
1709 | break; | |
1710 | } | |
d3a7dcfe TI |
1711 | /* find a substream to drain */ |
1712 | to_check = NULL; | |
1713 | snd_pcm_group_for_each_entry(s, substream) { | |
1714 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1715 | continue; | |
1716 | runtime = s->runtime; | |
1717 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1718 | to_check = runtime; | |
21cb2a2e | 1719 | break; |
d3a7dcfe | 1720 | } |
21cb2a2e | 1721 | } |
d3a7dcfe TI |
1722 | if (!to_check) |
1723 | break; /* all drained */ | |
1724 | init_waitqueue_entry(&wait, current); | |
1725 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1726 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1727 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1728 | snd_power_unlock(card); |
f2b3614c TI |
1729 | if (runtime->no_period_wakeup) |
1730 | tout = MAX_SCHEDULE_TIMEOUT; | |
1731 | else { | |
1732 | tout = 10; | |
1733 | if (runtime->rate) { | |
1734 | long t = runtime->period_size * 2 / runtime->rate; | |
1735 | tout = max(t, tout); | |
1736 | } | |
1737 | tout = msecs_to_jiffies(tout * 1000); | |
1738 | } | |
1739 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1740 | snd_power_lock(card); |
d3a7dcfe | 1741 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1742 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1743 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1744 | if (card->shutdown) { |
1745 | result = -ENODEV; | |
1746 | break; | |
1747 | } | |
1da177e4 LT |
1748 | if (tout == 0) { |
1749 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1750 | result = -ESTRPIPE; | |
1751 | else { | |
09e56df8 TI |
1752 | dev_dbg(substream->pcm->card->dev, |
1753 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1754 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1755 | result = -EIO; | |
1756 | } | |
1757 | break; | |
1758 | } | |
1da177e4 | 1759 | } |
21cb2a2e | 1760 | |
4cdc115f | 1761 | unlock: |
21cb2a2e | 1762 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1763 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1764 | snd_power_unlock(card); |
1da177e4 LT |
1765 | |
1766 | return result; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * drop ioctl | |
1771 | * | |
1772 | * Immediately put all linked substreams into SETUP state. | |
1773 | */ | |
877211f5 | 1774 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1775 | { |
877211f5 | 1776 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1777 | int result = 0; |
1778 | ||
7eaa943c TI |
1779 | if (PCM_RUNTIME_CHECK(substream)) |
1780 | return -ENXIO; | |
1da177e4 | 1781 | runtime = substream->runtime; |
1da177e4 | 1782 | |
de1b8b93 | 1783 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1784 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1785 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1786 | return -EBADFD; |
1787 | ||
1da177e4 LT |
1788 | snd_pcm_stream_lock_irq(substream); |
1789 | /* resume pause */ | |
1790 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1791 | snd_pcm_pause(substream, 0); | |
1792 | ||
1793 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1794 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1795 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1796 | |
1da177e4 LT |
1797 | return result; |
1798 | } | |
1799 | ||
1800 | ||
0888c321 | 1801 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1802 | { |
0888c321 | 1803 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1804 | unsigned int minor; |
1805 | ||
0888c321 AV |
1806 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1807 | return false; | |
1da177e4 | 1808 | minor = iminor(inode); |
0888c321 AV |
1809 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1810 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1811 | } |
1812 | ||
1813 | /* | |
1814 | * PCM link handling | |
1815 | */ | |
877211f5 | 1816 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1817 | { |
1818 | int res = 0; | |
877211f5 TI |
1819 | struct snd_pcm_file *pcm_file; |
1820 | struct snd_pcm_substream *substream1; | |
1662591b | 1821 | struct snd_pcm_group *group; |
0888c321 | 1822 | struct fd f = fdget(fd); |
1da177e4 | 1823 | |
0888c321 | 1824 | if (!f.file) |
1da177e4 | 1825 | return -EBADFD; |
0888c321 AV |
1826 | if (!is_pcm_file(f.file)) { |
1827 | res = -EBADFD; | |
1828 | goto _badf; | |
1829 | } | |
1830 | pcm_file = f.file->private_data; | |
1da177e4 | 1831 | substream1 = pcm_file->substream; |
1662591b TI |
1832 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1833 | if (!group) { | |
1834 | res = -ENOMEM; | |
1835 | goto _nolock; | |
1836 | } | |
67ec1072 | 1837 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1838 | write_lock_irq(&snd_pcm_link_rwlock); |
1839 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1840 | substream->runtime->status->state != substream1->runtime->status->state || |
1841 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1842 | res = -EBADFD; |
1843 | goto _end; | |
1844 | } | |
1845 | if (snd_pcm_stream_linked(substream1)) { | |
1846 | res = -EALREADY; | |
1847 | goto _end; | |
1848 | } | |
1849 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1850 | substream->group = group; |
dd6c5cd8 | 1851 | group = NULL; |
1da177e4 | 1852 | spin_lock_init(&substream->group->lock); |
257f8cce | 1853 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1854 | INIT_LIST_HEAD(&substream->group->substreams); |
1855 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1856 | substream->group->count = 1; | |
1857 | } | |
1858 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1859 | substream->group->count++; | |
1860 | substream1->group = substream->group; | |
1861 | _end: | |
1862 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1863 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1864 | _nolock: |
a0830dbd | 1865 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1866 | kfree(group); |
0888c321 AV |
1867 | _badf: |
1868 | fdput(f); | |
1da177e4 LT |
1869 | return res; |
1870 | } | |
1871 | ||
877211f5 | 1872 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1873 | { |
1874 | substream->group = &substream->self_group; | |
1875 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1876 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1877 | } | |
1878 | ||
877211f5 | 1879 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1880 | { |
ef991b95 | 1881 | struct snd_pcm_substream *s; |
1da177e4 LT |
1882 | int res = 0; |
1883 | ||
67ec1072 | 1884 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1885 | write_lock_irq(&snd_pcm_link_rwlock); |
1886 | if (!snd_pcm_stream_linked(substream)) { | |
1887 | res = -EALREADY; | |
1888 | goto _end; | |
1889 | } | |
1890 | list_del(&substream->link_list); | |
1891 | substream->group->count--; | |
1892 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1893 | snd_pcm_group_for_each_entry(s, substream) { |
1894 | relink_to_local(s); | |
1da177e4 LT |
1895 | break; |
1896 | } | |
1897 | kfree(substream->group); | |
1898 | } | |
1899 | relink_to_local(substream); | |
1900 | _end: | |
1901 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1902 | up_write(&snd_pcm_link_rwsem); | |
1903 | return res; | |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * hw configurator | |
1908 | */ | |
877211f5 TI |
1909 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1910 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1911 | { |
877211f5 | 1912 | struct snd_interval t; |
1da177e4 LT |
1913 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1914 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1915 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1916 | } | |
1917 | ||
877211f5 TI |
1918 | static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, |
1919 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1920 | { |
877211f5 | 1921 | struct snd_interval t; |
1da177e4 LT |
1922 | snd_interval_div(hw_param_interval_c(params, rule->deps[0]), |
1923 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1924 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1925 | } | |
1926 | ||
877211f5 TI |
1927 | static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, |
1928 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1929 | { |
877211f5 | 1930 | struct snd_interval t; |
1da177e4 LT |
1931 | snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1932 | hw_param_interval_c(params, rule->deps[1]), | |
1933 | (unsigned long) rule->private, &t); | |
1934 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1935 | } | |
1936 | ||
877211f5 TI |
1937 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1938 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1939 | { |
877211f5 | 1940 | struct snd_interval t; |
1da177e4 LT |
1941 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1942 | (unsigned long) rule->private, | |
1943 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1944 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1945 | } | |
1946 | ||
877211f5 TI |
1947 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1948 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1949 | { |
1950 | unsigned int k; | |
b55f9fdc TS |
1951 | const struct snd_interval *i = |
1952 | hw_param_interval_c(params, rule->deps[0]); | |
877211f5 TI |
1953 | struct snd_mask m; |
1954 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1955 | snd_mask_any(&m); |
1956 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1957 | int bits; | |
1958 | if (! snd_mask_test(mask, k)) | |
1959 | continue; | |
1960 | bits = snd_pcm_format_physical_width(k); | |
1961 | if (bits <= 0) | |
1962 | continue; /* ignore invalid formats */ | |
1963 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1964 | snd_mask_reset(&m, k); | |
1965 | } | |
1966 | return snd_mask_refine(mask, &m); | |
1967 | } | |
1968 | ||
877211f5 TI |
1969 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1970 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1971 | { |
877211f5 | 1972 | struct snd_interval t; |
1da177e4 LT |
1973 | unsigned int k; |
1974 | t.min = UINT_MAX; | |
1975 | t.max = 0; | |
1976 | t.openmin = 0; | |
1977 | t.openmax = 0; | |
1978 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1979 | int bits; | |
1980 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1981 | continue; | |
1982 | bits = snd_pcm_format_physical_width(k); | |
1983 | if (bits <= 0) | |
1984 | continue; /* ignore invalid formats */ | |
1985 | if (t.min > (unsigned)bits) | |
1986 | t.min = bits; | |
1987 | if (t.max < (unsigned)bits) | |
1988 | t.max = bits; | |
1989 | } | |
1990 | t.integer = 1; | |
1991 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1992 | } | |
1993 | ||
1994 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1995 | #error "Change this table" | |
1996 | #endif | |
1997 | ||
8b674308 TS |
1998 | static const unsigned int rates[] = { |
1999 | 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
2000 | 48000, 64000, 88200, 96000, 176400, 192000 | |
2001 | }; | |
1da177e4 | 2002 | |
7653d557 CL |
2003 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
2004 | .count = ARRAY_SIZE(rates), | |
2005 | .list = rates, | |
2006 | }; | |
2007 | ||
877211f5 TI |
2008 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
2009 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2010 | { |
877211f5 | 2011 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 2012 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
2013 | snd_pcm_known_rates.count, |
2014 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
2015 | } |
2016 | ||
877211f5 TI |
2017 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
2018 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2019 | { |
877211f5 TI |
2020 | struct snd_interval t; |
2021 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
2022 | t.min = 0; |
2023 | t.max = substream->buffer_bytes_max; | |
2024 | t.openmin = 0; | |
2025 | t.openmax = 0; | |
2026 | t.integer = 1; | |
2027 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2028 | } | |
2029 | ||
877211f5 | 2030 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2031 | { |
877211f5 TI |
2032 | struct snd_pcm_runtime *runtime = substream->runtime; |
2033 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2034 | int k, err; |
2035 | ||
2036 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2037 | snd_mask_any(constrs_mask(constrs, k)); | |
2038 | } | |
2039 | ||
2040 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2041 | snd_interval_any(constrs_interval(constrs, k)); | |
2042 | } | |
2043 | ||
2044 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2045 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2046 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2047 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2048 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2049 | ||
2050 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2051 | snd_pcm_hw_rule_format, NULL, | |
2052 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2053 | if (err < 0) | |
2054 | return err; | |
2055 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2056 | snd_pcm_hw_rule_sample_bits, NULL, | |
2057 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2058 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2059 | if (err < 0) | |
2060 | return err; | |
2061 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2062 | snd_pcm_hw_rule_div, NULL, | |
2063 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2064 | if (err < 0) | |
2065 | return err; | |
2066 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2067 | snd_pcm_hw_rule_mul, NULL, | |
2068 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2069 | if (err < 0) | |
2070 | return err; | |
2071 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2072 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2073 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2074 | if (err < 0) | |
2075 | return err; | |
2076 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2077 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2078 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2079 | if (err < 0) | |
2080 | return err; | |
2081 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2082 | snd_pcm_hw_rule_div, NULL, | |
2083 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2084 | if (err < 0) | |
2085 | return err; | |
2086 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2087 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2088 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2089 | if (err < 0) | |
2090 | return err; | |
2091 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2092 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2093 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2094 | if (err < 0) | |
2095 | return err; | |
2096 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2097 | snd_pcm_hw_rule_div, NULL, | |
2098 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2099 | if (err < 0) | |
2100 | return err; | |
2101 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2102 | snd_pcm_hw_rule_div, NULL, | |
2103 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2104 | if (err < 0) | |
2105 | return err; | |
2106 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2107 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2108 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2109 | if (err < 0) | |
2110 | return err; | |
2111 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2112 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2113 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2114 | if (err < 0) | |
2115 | return err; | |
2116 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2117 | snd_pcm_hw_rule_mul, NULL, | |
2118 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2119 | if (err < 0) | |
2120 | return err; | |
2121 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2122 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2123 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2124 | if (err < 0) | |
2125 | return err; | |
2126 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2127 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2128 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2129 | if (err < 0) | |
2130 | return err; | |
2131 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2132 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2133 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2134 | if (err < 0) | |
2135 | return err; | |
2136 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2137 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2138 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2139 | if (err < 0) | |
2140 | return err; | |
2141 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2142 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2143 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2144 | if (err < 0) | |
2145 | return err; | |
2146 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2147 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2148 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2149 | if (err < 0) | |
2150 | return err; | |
2151 | return 0; | |
2152 | } | |
2153 | ||
877211f5 | 2154 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2155 | { |
877211f5 TI |
2156 | struct snd_pcm_runtime *runtime = substream->runtime; |
2157 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2158 | int err; |
2159 | unsigned int mask = 0; | |
2160 | ||
2161 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2162 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2163 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2164 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2165 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2166 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2167 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2168 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2169 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2170 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2171 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2172 | } | |
2173 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2174 | if (err < 0) |
2175 | return err; | |
1da177e4 LT |
2176 | |
2177 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2178 | if (err < 0) |
2179 | return err; | |
1da177e4 LT |
2180 | |
2181 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2182 | if (err < 0) |
2183 | return err; | |
1da177e4 LT |
2184 | |
2185 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2186 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2187 | if (err < 0) |
2188 | return err; | |
1da177e4 LT |
2189 | |
2190 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2191 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2192 | if (err < 0) |
2193 | return err; | |
1da177e4 LT |
2194 | |
2195 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2196 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2197 | if (err < 0) |
2198 | return err; | |
1da177e4 LT |
2199 | |
2200 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2201 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2202 | if (err < 0) |
2203 | return err; | |
1da177e4 LT |
2204 | |
2205 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2206 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2207 | if (err < 0) |
2208 | return err; | |
1da177e4 LT |
2209 | |
2210 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2211 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2212 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2213 | if (err < 0) | |
2214 | return err; | |
2215 | ||
2216 | /* FIXME: remove */ | |
2217 | if (runtime->dma_bytes) { | |
2218 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2219 | if (err < 0) |
6cf95152 | 2220 | return err; |
1da177e4 LT |
2221 | } |
2222 | ||
2223 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2224 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2225 | snd_pcm_hw_rule_rate, hw, | |
2226 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2227 | if (err < 0) | |
2228 | return err; | |
2229 | } | |
2230 | ||
2231 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2232 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2233 | ||
2234 | return 0; | |
2235 | } | |
2236 | ||
3bf75f9b | 2237 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2238 | { |
1da177e4 | 2239 | snd_pcm_unlink(substream); |
3bf75f9b TI |
2240 | } |
2241 | ||
2242 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2243 | { | |
0df63e44 TI |
2244 | substream->ref_count--; |
2245 | if (substream->ref_count > 0) | |
2246 | return; | |
2247 | ||
3bf75f9b | 2248 | snd_pcm_drop(substream); |
3bf75f9b | 2249 | if (substream->hw_opened) { |
094435d4 TI |
2250 | if (substream->ops->hw_free && |
2251 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2252 | substream->ops->hw_free(substream); |
2253 | substream->ops->close(substream); | |
3bf75f9b | 2254 | substream->hw_opened = 0; |
1da177e4 | 2255 | } |
8699a0b6 TI |
2256 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2257 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2258 | if (substream->pcm_release) { |
2259 | substream->pcm_release(substream); | |
2260 | substream->pcm_release = NULL; | |
2261 | } | |
3bf75f9b TI |
2262 | snd_pcm_detach_substream(substream); |
2263 | } | |
2264 | ||
e88e8ae6 TI |
2265 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2266 | ||
3bf75f9b TI |
2267 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2268 | struct file *file, | |
2269 | struct snd_pcm_substream **rsubstream) | |
2270 | { | |
2271 | struct snd_pcm_substream *substream; | |
2272 | int err; | |
2273 | ||
2274 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2275 | if (err < 0) | |
2276 | return err; | |
0df63e44 TI |
2277 | if (substream->ref_count > 1) { |
2278 | *rsubstream = substream; | |
2279 | return 0; | |
2280 | } | |
2281 | ||
3bf75f9b TI |
2282 | err = snd_pcm_hw_constraints_init(substream); |
2283 | if (err < 0) { | |
09e56df8 | 2284 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2285 | goto error; |
2286 | } | |
2287 | ||
2288 | if ((err = substream->ops->open(substream)) < 0) | |
2289 | goto error; | |
2290 | ||
2291 | substream->hw_opened = 1; | |
2292 | ||
2293 | err = snd_pcm_hw_constraints_complete(substream); | |
2294 | if (err < 0) { | |
09e56df8 | 2295 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2296 | goto error; |
2297 | } | |
2298 | ||
2299 | *rsubstream = substream; | |
1da177e4 | 2300 | return 0; |
3bf75f9b TI |
2301 | |
2302 | error: | |
2303 | snd_pcm_release_substream(substream); | |
2304 | return err; | |
1da177e4 LT |
2305 | } |
2306 | ||
e88e8ae6 TI |
2307 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2308 | ||
1da177e4 | 2309 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2310 | struct snd_pcm *pcm, |
ffd3d5c6 | 2311 | int stream) |
1da177e4 | 2312 | { |
877211f5 TI |
2313 | struct snd_pcm_file *pcm_file; |
2314 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2315 | int err; |
1da177e4 | 2316 | |
3bf75f9b TI |
2317 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2318 | if (err < 0) | |
2319 | return err; | |
2320 | ||
548a648b TI |
2321 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2322 | if (pcm_file == NULL) { | |
2323 | snd_pcm_release_substream(substream); | |
2324 | return -ENOMEM; | |
2325 | } | |
2326 | pcm_file->substream = substream; | |
2327 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2328 | substream->file = pcm_file; |
2329 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2330 | } |
1da177e4 | 2331 | file->private_data = pcm_file; |
ffd3d5c6 | 2332 | |
1da177e4 LT |
2333 | return 0; |
2334 | } | |
2335 | ||
f87135f5 CL |
2336 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2337 | { | |
2338 | struct snd_pcm *pcm; | |
02f4865f TI |
2339 | int err = nonseekable_open(inode, file); |
2340 | if (err < 0) | |
2341 | return err; | |
f87135f5 CL |
2342 | pcm = snd_lookup_minor_data(iminor(inode), |
2343 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2344 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2345 | if (pcm) |
2346 | snd_card_unref(pcm->card); | |
a0830dbd | 2347 | return err; |
f87135f5 CL |
2348 | } |
2349 | ||
2350 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2351 | { |
877211f5 | 2352 | struct snd_pcm *pcm; |
02f4865f TI |
2353 | int err = nonseekable_open(inode, file); |
2354 | if (err < 0) | |
2355 | return err; | |
f87135f5 CL |
2356 | pcm = snd_lookup_minor_data(iminor(inode), |
2357 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2358 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2359 | if (pcm) |
2360 | snd_card_unref(pcm->card); | |
a0830dbd | 2361 | return err; |
f87135f5 CL |
2362 | } |
2363 | ||
2364 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2365 | { | |
2366 | int err; | |
1da177e4 LT |
2367 | wait_queue_t wait; |
2368 | ||
1da177e4 LT |
2369 | if (pcm == NULL) { |
2370 | err = -ENODEV; | |
2371 | goto __error1; | |
2372 | } | |
2373 | err = snd_card_file_add(pcm->card, file); | |
2374 | if (err < 0) | |
2375 | goto __error1; | |
2376 | if (!try_module_get(pcm->card->module)) { | |
2377 | err = -EFAULT; | |
2378 | goto __error2; | |
2379 | } | |
2380 | init_waitqueue_entry(&wait, current); | |
2381 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2382 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2383 | while (1) { |
ffd3d5c6 | 2384 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2385 | if (err >= 0) |
2386 | break; | |
2387 | if (err == -EAGAIN) { | |
2388 | if (file->f_flags & O_NONBLOCK) { | |
2389 | err = -EBUSY; | |
2390 | break; | |
2391 | } | |
2392 | } else | |
2393 | break; | |
2394 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2395 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2396 | schedule(); |
1a60d4c5 | 2397 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2398 | if (pcm->card->shutdown) { |
2399 | err = -ENODEV; | |
2400 | break; | |
2401 | } | |
1da177e4 LT |
2402 | if (signal_pending(current)) { |
2403 | err = -ERESTARTSYS; | |
2404 | break; | |
2405 | } | |
2406 | } | |
2407 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2408 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2409 | if (err < 0) |
2410 | goto __error; | |
2411 | return err; | |
2412 | ||
2413 | __error: | |
2414 | module_put(pcm->card->module); | |
2415 | __error2: | |
2416 | snd_card_file_remove(pcm->card, file); | |
2417 | __error1: | |
2418 | return err; | |
2419 | } | |
2420 | ||
2421 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2422 | { | |
877211f5 TI |
2423 | struct snd_pcm *pcm; |
2424 | struct snd_pcm_substream *substream; | |
2425 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2426 | |
2427 | pcm_file = file->private_data; | |
2428 | substream = pcm_file->substream; | |
7eaa943c TI |
2429 | if (snd_BUG_ON(!substream)) |
2430 | return -ENXIO; | |
1da177e4 | 2431 | pcm = substream->pcm; |
1a60d4c5 | 2432 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2433 | snd_pcm_release_substream(substream); |
548a648b | 2434 | kfree(pcm_file); |
1a60d4c5 | 2435 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2436 | wake_up(&pcm->open_wait); |
2437 | module_put(pcm->card->module); | |
2438 | snd_card_file_remove(pcm->card, file); | |
2439 | return 0; | |
2440 | } | |
2441 | ||
f839cc1c TI |
2442 | /* check and update PCM state; return 0 or a negative error |
2443 | * call this inside PCM lock | |
2444 | */ | |
2445 | static int do_pcm_hwsync(struct snd_pcm_substream *substream) | |
2446 | { | |
2447 | switch (substream->runtime->status->state) { | |
2448 | case SNDRV_PCM_STATE_DRAINING: | |
2449 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2450 | return -EBADFD; | |
2451 | /* Fall through */ | |
2452 | case SNDRV_PCM_STATE_RUNNING: | |
2453 | return snd_pcm_update_hw_ptr(substream); | |
2454 | case SNDRV_PCM_STATE_PREPARED: | |
2455 | case SNDRV_PCM_STATE_PAUSED: | |
2456 | return 0; | |
2457 | case SNDRV_PCM_STATE_SUSPENDED: | |
2458 | return -ESTRPIPE; | |
2459 | case SNDRV_PCM_STATE_XRUN: | |
2460 | return -EPIPE; | |
2461 | default: | |
2462 | return -EBADFD; | |
2463 | } | |
2464 | } | |
2465 | ||
9027c463 TI |
2466 | /* update to the given appl_ptr and call ack callback if needed; |
2467 | * when an error is returned, take back to the original value | |
2468 | */ | |
2469 | static int apply_appl_ptr(struct snd_pcm_substream *substream, | |
2470 | snd_pcm_uframes_t appl_ptr) | |
2471 | { | |
2472 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2473 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; | |
2474 | int ret; | |
2475 | ||
2476 | runtime->control->appl_ptr = appl_ptr; | |
2477 | if (substream->ops->ack) { | |
2478 | ret = substream->ops->ack(substream); | |
2479 | if (ret < 0) { | |
2480 | runtime->control->appl_ptr = old_appl_ptr; | |
2481 | return ret; | |
2482 | } | |
2483 | } | |
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | /* increase the appl_ptr; returns the processed frames or a negative error */ | |
e0327a0f TI |
2488 | static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream, |
2489 | snd_pcm_uframes_t frames, | |
2490 | snd_pcm_sframes_t avail) | |
2491 | { | |
2492 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2493 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2494 | int ret; |
e0327a0f TI |
2495 | |
2496 | if (avail <= 0) | |
2497 | return 0; | |
2498 | if (frames > (snd_pcm_uframes_t)avail) | |
2499 | frames = avail; | |
2500 | appl_ptr = runtime->control->appl_ptr + frames; | |
2501 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2502 | appl_ptr -= runtime->boundary; | |
9027c463 TI |
2503 | ret = apply_appl_ptr(substream, appl_ptr); |
2504 | return ret < 0 ? ret : frames; | |
e0327a0f TI |
2505 | } |
2506 | ||
9027c463 | 2507 | /* decrease the appl_ptr; returns the processed frames or a negative error */ |
e0327a0f TI |
2508 | static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream, |
2509 | snd_pcm_uframes_t frames, | |
2510 | snd_pcm_sframes_t avail) | |
2511 | { | |
2512 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2513 | snd_pcm_sframes_t appl_ptr; | |
9027c463 | 2514 | int ret; |
e0327a0f TI |
2515 | |
2516 | if (avail <= 0) | |
2517 | return 0; | |
2518 | if (frames > (snd_pcm_uframes_t)avail) | |
2519 | frames = avail; | |
2520 | appl_ptr = runtime->control->appl_ptr - frames; | |
2521 | if (appl_ptr < 0) | |
2522 | appl_ptr += runtime->boundary; | |
9027c463 TI |
2523 | ret = apply_appl_ptr(substream, appl_ptr); |
2524 | return ret < 0 ? ret : frames; | |
e0327a0f TI |
2525 | } |
2526 | ||
877211f5 TI |
2527 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2528 | snd_pcm_uframes_t frames) | |
1da177e4 | 2529 | { |
877211f5 | 2530 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2531 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2532 | |
2533 | if (frames == 0) | |
2534 | return 0; | |
2535 | ||
2536 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2537 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2538 | if (!ret) |
2539 | ret = rewind_appl_ptr(substream, frames, | |
2540 | snd_pcm_playback_hw_avail(runtime)); | |
1da177e4 LT |
2541 | snd_pcm_stream_unlock_irq(substream); |
2542 | return ret; | |
2543 | } | |
2544 | ||
877211f5 TI |
2545 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2546 | snd_pcm_uframes_t frames) | |
1da177e4 | 2547 | { |
877211f5 | 2548 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2549 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2550 | |
2551 | if (frames == 0) | |
2552 | return 0; | |
2553 | ||
2554 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2555 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2556 | if (!ret) |
2557 | ret = rewind_appl_ptr(substream, frames, | |
2558 | snd_pcm_capture_hw_avail(runtime)); | |
1da177e4 LT |
2559 | snd_pcm_stream_unlock_irq(substream); |
2560 | return ret; | |
2561 | } | |
2562 | ||
877211f5 TI |
2563 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2564 | snd_pcm_uframes_t frames) | |
1da177e4 | 2565 | { |
877211f5 | 2566 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2567 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2568 | |
2569 | if (frames == 0) | |
2570 | return 0; | |
2571 | ||
2572 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2573 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2574 | if (!ret) |
2575 | ret = forward_appl_ptr(substream, frames, | |
2576 | snd_pcm_playback_avail(runtime)); | |
1da177e4 LT |
2577 | snd_pcm_stream_unlock_irq(substream); |
2578 | return ret; | |
2579 | } | |
2580 | ||
877211f5 TI |
2581 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2582 | snd_pcm_uframes_t frames) | |
1da177e4 | 2583 | { |
877211f5 | 2584 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 2585 | snd_pcm_sframes_t ret; |
1da177e4 LT |
2586 | |
2587 | if (frames == 0) | |
2588 | return 0; | |
2589 | ||
2590 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2591 | ret = do_pcm_hwsync(substream); |
e0327a0f TI |
2592 | if (!ret) |
2593 | ret = forward_appl_ptr(substream, frames, | |
2594 | snd_pcm_capture_avail(runtime)); | |
1da177e4 LT |
2595 | snd_pcm_stream_unlock_irq(substream); |
2596 | return ret; | |
2597 | } | |
2598 | ||
877211f5 | 2599 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2600 | { |
1da177e4 LT |
2601 | int err; |
2602 | ||
2603 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c | 2604 | err = do_pcm_hwsync(substream); |
1da177e4 LT |
2605 | snd_pcm_stream_unlock_irq(substream); |
2606 | return err; | |
2607 | } | |
2608 | ||
c2c86a97 | 2609 | static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream) |
1da177e4 | 2610 | { |
877211f5 | 2611 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2612 | int err; |
2613 | snd_pcm_sframes_t n = 0; | |
2614 | ||
2615 | snd_pcm_stream_lock_irq(substream); | |
f839cc1c TI |
2616 | err = do_pcm_hwsync(substream); |
2617 | if (!err) { | |
1da177e4 LT |
2618 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
2619 | n = snd_pcm_playback_hw_avail(runtime); | |
2620 | else | |
2621 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2622 | n += runtime->delay; |
1da177e4 LT |
2623 | } |
2624 | snd_pcm_stream_unlock_irq(substream); | |
c2c86a97 | 2625 | return err < 0 ? err : n; |
1da177e4 LT |
2626 | } |
2627 | ||
877211f5 TI |
2628 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2629 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2630 | { |
877211f5 TI |
2631 | struct snd_pcm_runtime *runtime = substream->runtime; |
2632 | struct snd_pcm_sync_ptr sync_ptr; | |
2633 | volatile struct snd_pcm_mmap_status *status; | |
2634 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2635 | int err; |
2636 | ||
2637 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2638 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2639 | return -EFAULT; | |
877211f5 | 2640 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2641 | return -EFAULT; |
2642 | status = runtime->status; | |
2643 | control = runtime->control; | |
2644 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2645 | err = snd_pcm_hwsync(substream); | |
2646 | if (err < 0) | |
2647 | return err; | |
2648 | } | |
2649 | snd_pcm_stream_lock_irq(substream); | |
9027c463 TI |
2650 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) { |
2651 | err = apply_appl_ptr(substream, sync_ptr.c.control.appl_ptr); | |
2652 | if (err < 0) { | |
2653 | snd_pcm_stream_unlock_irq(substream); | |
2654 | return err; | |
2655 | } | |
2656 | } else { | |
1da177e4 | 2657 | sync_ptr.c.control.appl_ptr = control->appl_ptr; |
9027c463 | 2658 | } |
1da177e4 LT |
2659 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) |
2660 | control->avail_min = sync_ptr.c.control.avail_min; | |
2661 | else | |
2662 | sync_ptr.c.control.avail_min = control->avail_min; | |
2663 | sync_ptr.s.status.state = status->state; | |
2664 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2665 | sync_ptr.s.status.tstamp = status->tstamp; | |
2666 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2667 | snd_pcm_stream_unlock_irq(substream); | |
2668 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2669 | return -EFAULT; | |
2670 | return 0; | |
2671 | } | |
b751eef1 JK |
2672 | |
2673 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2674 | { | |
2675 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2676 | int arg; | |
2677 | ||
2678 | if (get_user(arg, _arg)) | |
2679 | return -EFAULT; | |
2680 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2681 | return -EINVAL; | |
2408c219 | 2682 | runtime->tstamp_type = arg; |
b751eef1 JK |
2683 | return 0; |
2684 | } | |
1da177e4 | 2685 | |
0df63e44 TI |
2686 | static int snd_pcm_common_ioctl1(struct file *file, |
2687 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2688 | unsigned int cmd, void __user *arg) |
2689 | { | |
1da177e4 LT |
2690 | switch (cmd) { |
2691 | case SNDRV_PCM_IOCTL_PVERSION: | |
2692 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2693 | case SNDRV_PCM_IOCTL_INFO: | |
2694 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2695 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2696 | return 0; | |
b751eef1 JK |
2697 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2698 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2699 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2700 | return snd_pcm_hw_refine_user(substream, arg); | |
2701 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2702 | return snd_pcm_hw_params_user(substream, arg); | |
2703 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2704 | return snd_pcm_hw_free(substream); | |
2705 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2706 | return snd_pcm_sw_params_user(substream, arg); | |
2707 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2708 | return snd_pcm_status_user(substream, arg, false); |
2709 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2710 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2711 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2712 | return snd_pcm_channel_info_user(substream, arg); | |
2713 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2714 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2715 | case SNDRV_PCM_IOCTL_RESET: |
2716 | return snd_pcm_reset(substream); | |
2717 | case SNDRV_PCM_IOCTL_START: | |
c2c86a97 | 2718 | return snd_pcm_start_lock_irq(substream); |
1da177e4 LT |
2719 | case SNDRV_PCM_IOCTL_LINK: |
2720 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2721 | case SNDRV_PCM_IOCTL_UNLINK: | |
2722 | return snd_pcm_unlink(substream); | |
2723 | case SNDRV_PCM_IOCTL_RESUME: | |
2724 | return snd_pcm_resume(substream); | |
2725 | case SNDRV_PCM_IOCTL_XRUN: | |
2726 | return snd_pcm_xrun(substream); | |
2727 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2728 | return snd_pcm_hwsync(substream); | |
2729 | case SNDRV_PCM_IOCTL_DELAY: | |
c2c86a97 TI |
2730 | { |
2731 | snd_pcm_sframes_t delay = snd_pcm_delay(substream); | |
2732 | snd_pcm_sframes_t __user *res = arg; | |
2733 | ||
2734 | if (delay < 0) | |
2735 | return delay; | |
2736 | if (put_user(delay, res)) | |
2737 | return -EFAULT; | |
2738 | return 0; | |
2739 | } | |
1da177e4 LT |
2740 | case SNDRV_PCM_IOCTL_SYNC_PTR: |
2741 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2742 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2743 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2744 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2745 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2746 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2747 | #endif |
1da177e4 | 2748 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2749 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2750 | case SNDRV_PCM_IOCTL_DROP: |
2751 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2752 | case SNDRV_PCM_IOCTL_PAUSE: |
2753 | { | |
2754 | int res; | |
2755 | snd_pcm_stream_lock_irq(substream); | |
2756 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2757 | snd_pcm_stream_unlock_irq(substream); | |
2758 | return res; | |
2759 | } | |
1da177e4 | 2760 | } |
09e56df8 | 2761 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2762 | return -ENOTTY; |
2763 | } | |
2764 | ||
0df63e44 TI |
2765 | static int snd_pcm_playback_ioctl1(struct file *file, |
2766 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2767 | unsigned int cmd, void __user *arg) |
2768 | { | |
7eaa943c TI |
2769 | if (snd_BUG_ON(!substream)) |
2770 | return -ENXIO; | |
2771 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2772 | return -EINVAL; | |
1da177e4 LT |
2773 | switch (cmd) { |
2774 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2775 | { | |
877211f5 TI |
2776 | struct snd_xferi xferi; |
2777 | struct snd_xferi __user *_xferi = arg; | |
2778 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2779 | snd_pcm_sframes_t result; |
2780 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2781 | return -EBADFD; | |
2782 | if (put_user(0, &_xferi->result)) | |
2783 | return -EFAULT; | |
2784 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2785 | return -EFAULT; | |
2786 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2787 | __put_user(result, &_xferi->result); | |
2788 | return result < 0 ? result : 0; | |
2789 | } | |
2790 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2791 | { | |
877211f5 TI |
2792 | struct snd_xfern xfern; |
2793 | struct snd_xfern __user *_xfern = arg; | |
2794 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2795 | void __user **bufs; |
2796 | snd_pcm_sframes_t result; | |
2797 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2798 | return -EBADFD; | |
2799 | if (runtime->channels > 128) | |
2800 | return -EINVAL; | |
2801 | if (put_user(0, &_xfern->result)) | |
2802 | return -EFAULT; | |
2803 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2804 | return -EFAULT; | |
ef44a1ec LZ |
2805 | |
2806 | bufs = memdup_user(xfern.bufs, | |
2807 | sizeof(void *) * runtime->channels); | |
2808 | if (IS_ERR(bufs)) | |
2809 | return PTR_ERR(bufs); | |
1da177e4 LT |
2810 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2811 | kfree(bufs); | |
2812 | __put_user(result, &_xfern->result); | |
2813 | return result < 0 ? result : 0; | |
2814 | } | |
2815 | case SNDRV_PCM_IOCTL_REWIND: | |
2816 | { | |
2817 | snd_pcm_uframes_t frames; | |
2818 | snd_pcm_uframes_t __user *_frames = arg; | |
2819 | snd_pcm_sframes_t result; | |
2820 | if (get_user(frames, _frames)) | |
2821 | return -EFAULT; | |
2822 | if (put_user(0, _frames)) | |
2823 | return -EFAULT; | |
2824 | result = snd_pcm_playback_rewind(substream, frames); | |
2825 | __put_user(result, _frames); | |
2826 | return result < 0 ? result : 0; | |
2827 | } | |
2828 | case SNDRV_PCM_IOCTL_FORWARD: | |
2829 | { | |
2830 | snd_pcm_uframes_t frames; | |
2831 | snd_pcm_uframes_t __user *_frames = arg; | |
2832 | snd_pcm_sframes_t result; | |
2833 | if (get_user(frames, _frames)) | |
2834 | return -EFAULT; | |
2835 | if (put_user(0, _frames)) | |
2836 | return -EFAULT; | |
2837 | result = snd_pcm_playback_forward(substream, frames); | |
2838 | __put_user(result, _frames); | |
2839 | return result < 0 ? result : 0; | |
2840 | } | |
1da177e4 | 2841 | } |
0df63e44 | 2842 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2843 | } |
2844 | ||
0df63e44 TI |
2845 | static int snd_pcm_capture_ioctl1(struct file *file, |
2846 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2847 | unsigned int cmd, void __user *arg) |
2848 | { | |
7eaa943c TI |
2849 | if (snd_BUG_ON(!substream)) |
2850 | return -ENXIO; | |
2851 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2852 | return -EINVAL; | |
1da177e4 LT |
2853 | switch (cmd) { |
2854 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2855 | { | |
877211f5 TI |
2856 | struct snd_xferi xferi; |
2857 | struct snd_xferi __user *_xferi = arg; | |
2858 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2859 | snd_pcm_sframes_t result; |
2860 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2861 | return -EBADFD; | |
2862 | if (put_user(0, &_xferi->result)) | |
2863 | return -EFAULT; | |
2864 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2865 | return -EFAULT; | |
2866 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2867 | __put_user(result, &_xferi->result); | |
2868 | return result < 0 ? result : 0; | |
2869 | } | |
2870 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2871 | { | |
877211f5 TI |
2872 | struct snd_xfern xfern; |
2873 | struct snd_xfern __user *_xfern = arg; | |
2874 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2875 | void *bufs; |
2876 | snd_pcm_sframes_t result; | |
2877 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2878 | return -EBADFD; | |
2879 | if (runtime->channels > 128) | |
2880 | return -EINVAL; | |
2881 | if (put_user(0, &_xfern->result)) | |
2882 | return -EFAULT; | |
2883 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2884 | return -EFAULT; | |
ef44a1ec LZ |
2885 | |
2886 | bufs = memdup_user(xfern.bufs, | |
2887 | sizeof(void *) * runtime->channels); | |
2888 | if (IS_ERR(bufs)) | |
2889 | return PTR_ERR(bufs); | |
1da177e4 LT |
2890 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2891 | kfree(bufs); | |
2892 | __put_user(result, &_xfern->result); | |
2893 | return result < 0 ? result : 0; | |
2894 | } | |
2895 | case SNDRV_PCM_IOCTL_REWIND: | |
2896 | { | |
2897 | snd_pcm_uframes_t frames; | |
2898 | snd_pcm_uframes_t __user *_frames = arg; | |
2899 | snd_pcm_sframes_t result; | |
2900 | if (get_user(frames, _frames)) | |
2901 | return -EFAULT; | |
2902 | if (put_user(0, _frames)) | |
2903 | return -EFAULT; | |
2904 | result = snd_pcm_capture_rewind(substream, frames); | |
2905 | __put_user(result, _frames); | |
2906 | return result < 0 ? result : 0; | |
2907 | } | |
2908 | case SNDRV_PCM_IOCTL_FORWARD: | |
2909 | { | |
2910 | snd_pcm_uframes_t frames; | |
2911 | snd_pcm_uframes_t __user *_frames = arg; | |
2912 | snd_pcm_sframes_t result; | |
2913 | if (get_user(frames, _frames)) | |
2914 | return -EFAULT; | |
2915 | if (put_user(0, _frames)) | |
2916 | return -EFAULT; | |
2917 | result = snd_pcm_capture_forward(substream, frames); | |
2918 | __put_user(result, _frames); | |
2919 | return result < 0 ? result : 0; | |
2920 | } | |
2921 | } | |
0df63e44 | 2922 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2923 | } |
2924 | ||
877211f5 TI |
2925 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2926 | unsigned long arg) | |
1da177e4 | 2927 | { |
877211f5 | 2928 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2929 | |
2930 | pcm_file = file->private_data; | |
2931 | ||
2932 | if (((cmd >> 8) & 0xff) != 'A') | |
2933 | return -ENOTTY; | |
2934 | ||
0df63e44 TI |
2935 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2936 | (void __user *)arg); | |
1da177e4 LT |
2937 | } |
2938 | ||
877211f5 TI |
2939 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2940 | unsigned long arg) | |
1da177e4 | 2941 | { |
877211f5 | 2942 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2943 | |
2944 | pcm_file = file->private_data; | |
2945 | ||
2946 | if (((cmd >> 8) & 0xff) != 'A') | |
2947 | return -ENOTTY; | |
2948 | ||
0df63e44 TI |
2949 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
2950 | (void __user *)arg); | |
1da177e4 LT |
2951 | } |
2952 | ||
c2c86a97 TI |
2953 | /** |
2954 | * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space | |
2955 | * @substream: PCM substream | |
2956 | * @cmd: IOCTL cmd | |
2957 | * @arg: IOCTL argument | |
2958 | * | |
2959 | * The function is provided primarily for OSS layer and USB gadget drivers, | |
2960 | * and it allows only the limited set of ioctls (hw_params, sw_params, | |
2961 | * prepare, start, drain, drop, forward). | |
2962 | */ | |
bf1bbb5a TI |
2963 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
2964 | unsigned int cmd, void *arg) | |
1da177e4 | 2965 | { |
c2c86a97 TI |
2966 | snd_pcm_uframes_t *frames = arg; |
2967 | snd_pcm_sframes_t result; | |
1da177e4 | 2968 | |
c2c86a97 TI |
2969 | switch (cmd) { |
2970 | case SNDRV_PCM_IOCTL_FORWARD: | |
2971 | { | |
2972 | /* provided only for OSS; capture-only and no value returned */ | |
2973 | if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) | |
2974 | return -EINVAL; | |
2975 | result = snd_pcm_capture_forward(substream, *frames); | |
2976 | return result < 0 ? result : 0; | |
2977 | } | |
2978 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2979 | return snd_pcm_hw_params(substream, arg); | |
2980 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2981 | return snd_pcm_sw_params(substream, arg); | |
2982 | case SNDRV_PCM_IOCTL_PREPARE: | |
2983 | return snd_pcm_prepare(substream, NULL); | |
2984 | case SNDRV_PCM_IOCTL_START: | |
2985 | return snd_pcm_start_lock_irq(substream); | |
2986 | case SNDRV_PCM_IOCTL_DRAIN: | |
2987 | return snd_pcm_drain(substream, NULL); | |
2988 | case SNDRV_PCM_IOCTL_DROP: | |
2989 | return snd_pcm_drop(substream); | |
2990 | case SNDRV_PCM_IOCTL_DELAY: | |
2991 | { | |
2992 | result = snd_pcm_delay(substream); | |
2993 | if (result < 0) | |
2994 | return result; | |
2995 | *frames = result; | |
2996 | return 0; | |
2997 | } | |
1da177e4 | 2998 | default: |
c2c86a97 | 2999 | return -EINVAL; |
1da177e4 LT |
3000 | } |
3001 | } | |
e88e8ae6 TI |
3002 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3003 | ||
877211f5 TI |
3004 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3005 | loff_t * offset) | |
1da177e4 | 3006 | { |
877211f5 TI |
3007 | struct snd_pcm_file *pcm_file; |
3008 | struct snd_pcm_substream *substream; | |
3009 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3010 | snd_pcm_sframes_t result; |
3011 | ||
3012 | pcm_file = file->private_data; | |
3013 | substream = pcm_file->substream; | |
7eaa943c TI |
3014 | if (PCM_RUNTIME_CHECK(substream)) |
3015 | return -ENXIO; | |
1da177e4 LT |
3016 | runtime = substream->runtime; |
3017 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3018 | return -EBADFD; | |
3019 | if (!frame_aligned(runtime, count)) | |
3020 | return -EINVAL; | |
3021 | count = bytes_to_frames(runtime, count); | |
3022 | result = snd_pcm_lib_read(substream, buf, count); | |
3023 | if (result > 0) | |
3024 | result = frames_to_bytes(runtime, result); | |
3025 | return result; | |
3026 | } | |
3027 | ||
877211f5 TI |
3028 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3029 | size_t count, loff_t * offset) | |
1da177e4 | 3030 | { |
877211f5 TI |
3031 | struct snd_pcm_file *pcm_file; |
3032 | struct snd_pcm_substream *substream; | |
3033 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3034 | snd_pcm_sframes_t result; |
3035 | ||
3036 | pcm_file = file->private_data; | |
3037 | substream = pcm_file->substream; | |
7eaa943c TI |
3038 | if (PCM_RUNTIME_CHECK(substream)) |
3039 | return -ENXIO; | |
1da177e4 | 3040 | runtime = substream->runtime; |
7eaa943c TI |
3041 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3042 | return -EBADFD; | |
3043 | if (!frame_aligned(runtime, count)) | |
3044 | return -EINVAL; | |
1da177e4 LT |
3045 | count = bytes_to_frames(runtime, count); |
3046 | result = snd_pcm_lib_write(substream, buf, count); | |
3047 | if (result > 0) | |
3048 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3049 | return result; |
3050 | } | |
3051 | ||
1c65d986 | 3052 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3053 | { |
877211f5 TI |
3054 | struct snd_pcm_file *pcm_file; |
3055 | struct snd_pcm_substream *substream; | |
3056 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3057 | snd_pcm_sframes_t result; |
3058 | unsigned long i; | |
3059 | void __user **bufs; | |
3060 | snd_pcm_uframes_t frames; | |
3061 | ||
ee0b3e67 | 3062 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3063 | substream = pcm_file->substream; |
7eaa943c TI |
3064 | if (PCM_RUNTIME_CHECK(substream)) |
3065 | return -ENXIO; | |
1da177e4 LT |
3066 | runtime = substream->runtime; |
3067 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3068 | return -EBADFD; | |
1c65d986 AV |
3069 | if (!iter_is_iovec(to)) |
3070 | return -EINVAL; | |
3071 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3072 | return -EINVAL; |
1c65d986 | 3073 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3074 | return -EINVAL; |
1c65d986 AV |
3075 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
3076 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3077 | if (bufs == NULL) |
3078 | return -ENOMEM; | |
1c65d986 AV |
3079 | for (i = 0; i < to->nr_segs; ++i) |
3080 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3081 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3082 | if (result > 0) | |
3083 | result = frames_to_bytes(runtime, result); | |
3084 | kfree(bufs); | |
3085 | return result; | |
3086 | } | |
3087 | ||
1c65d986 | 3088 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3089 | { |
877211f5 TI |
3090 | struct snd_pcm_file *pcm_file; |
3091 | struct snd_pcm_substream *substream; | |
3092 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3093 | snd_pcm_sframes_t result; |
3094 | unsigned long i; | |
3095 | void __user **bufs; | |
3096 | snd_pcm_uframes_t frames; | |
3097 | ||
ee0b3e67 | 3098 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3099 | substream = pcm_file->substream; |
7eaa943c TI |
3100 | if (PCM_RUNTIME_CHECK(substream)) |
3101 | return -ENXIO; | |
1da177e4 | 3102 | runtime = substream->runtime; |
7eaa943c TI |
3103 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3104 | return -EBADFD; | |
1c65d986 AV |
3105 | if (!iter_is_iovec(from)) |
3106 | return -EINVAL; | |
3107 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3108 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3109 | return -EINVAL; |
1c65d986 AV |
3110 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
3111 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3112 | if (bufs == NULL) |
3113 | return -ENOMEM; | |
1c65d986 AV |
3114 | for (i = 0; i < from->nr_segs; ++i) |
3115 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3116 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3117 | if (result > 0) | |
3118 | result = frames_to_bytes(runtime, result); | |
3119 | kfree(bufs); | |
1da177e4 LT |
3120 | return result; |
3121 | } | |
3122 | ||
3123 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3124 | { | |
877211f5 TI |
3125 | struct snd_pcm_file *pcm_file; |
3126 | struct snd_pcm_substream *substream; | |
3127 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3128 | unsigned int mask; |
3129 | snd_pcm_uframes_t avail; | |
3130 | ||
3131 | pcm_file = file->private_data; | |
3132 | ||
3133 | substream = pcm_file->substream; | |
7eaa943c | 3134 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3135 | return POLLOUT | POLLWRNORM | POLLERR; |
1da177e4 LT |
3136 | runtime = substream->runtime; |
3137 | ||
3138 | poll_wait(file, &runtime->sleep, wait); | |
3139 | ||
3140 | snd_pcm_stream_lock_irq(substream); | |
3141 | avail = snd_pcm_playback_avail(runtime); | |
3142 | switch (runtime->status->state) { | |
3143 | case SNDRV_PCM_STATE_RUNNING: | |
3144 | case SNDRV_PCM_STATE_PREPARED: | |
3145 | case SNDRV_PCM_STATE_PAUSED: | |
3146 | if (avail >= runtime->control->avail_min) { | |
3147 | mask = POLLOUT | POLLWRNORM; | |
3148 | break; | |
3149 | } | |
3150 | /* Fall through */ | |
3151 | case SNDRV_PCM_STATE_DRAINING: | |
3152 | mask = 0; | |
3153 | break; | |
3154 | default: | |
3155 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3156 | break; | |
3157 | } | |
3158 | snd_pcm_stream_unlock_irq(substream); | |
3159 | return mask; | |
3160 | } | |
3161 | ||
3162 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3163 | { | |
877211f5 TI |
3164 | struct snd_pcm_file *pcm_file; |
3165 | struct snd_pcm_substream *substream; | |
3166 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3167 | unsigned int mask; |
3168 | snd_pcm_uframes_t avail; | |
3169 | ||
3170 | pcm_file = file->private_data; | |
3171 | ||
3172 | substream = pcm_file->substream; | |
7eaa943c | 3173 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3174 | return POLLIN | POLLRDNORM | POLLERR; |
1da177e4 LT |
3175 | runtime = substream->runtime; |
3176 | ||
3177 | poll_wait(file, &runtime->sleep, wait); | |
3178 | ||
3179 | snd_pcm_stream_lock_irq(substream); | |
3180 | avail = snd_pcm_capture_avail(runtime); | |
3181 | switch (runtime->status->state) { | |
3182 | case SNDRV_PCM_STATE_RUNNING: | |
3183 | case SNDRV_PCM_STATE_PREPARED: | |
3184 | case SNDRV_PCM_STATE_PAUSED: | |
3185 | if (avail >= runtime->control->avail_min) { | |
3186 | mask = POLLIN | POLLRDNORM; | |
3187 | break; | |
3188 | } | |
3189 | mask = 0; | |
3190 | break; | |
3191 | case SNDRV_PCM_STATE_DRAINING: | |
3192 | if (avail > 0) { | |
3193 | mask = POLLIN | POLLRDNORM; | |
3194 | break; | |
3195 | } | |
3196 | /* Fall through */ | |
3197 | default: | |
3198 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3199 | break; | |
3200 | } | |
3201 | snd_pcm_stream_unlock_irq(substream); | |
3202 | return mask; | |
3203 | } | |
3204 | ||
3205 | /* | |
3206 | * mmap support | |
3207 | */ | |
3208 | ||
3209 | /* | |
3210 | * Only on coherent architectures, we can mmap the status and the control records | |
3211 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3212 | */ | |
3213 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3214 | /* | |
3215 | * mmap status record | |
3216 | */ | |
11bac800 | 3217 | static int snd_pcm_mmap_status_fault(struct vm_fault *vmf) |
1da177e4 | 3218 | { |
11bac800 | 3219 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3220 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3221 | |
3222 | if (substream == NULL) | |
3ad5afcd | 3223 | return VM_FAULT_SIGBUS; |
1da177e4 | 3224 | runtime = substream->runtime; |
3ad5afcd NP |
3225 | vmf->page = virt_to_page(runtime->status); |
3226 | get_page(vmf->page); | |
3227 | return 0; | |
1da177e4 LT |
3228 | } |
3229 | ||
f0f37e2f | 3230 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3231 | { |
3ad5afcd | 3232 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3233 | }; |
3234 | ||
877211f5 | 3235 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3236 | struct vm_area_struct *area) |
3237 | { | |
1da177e4 LT |
3238 | long size; |
3239 | if (!(area->vm_flags & VM_READ)) | |
3240 | return -EINVAL; | |
1da177e4 | 3241 | size = area->vm_end - area->vm_start; |
877211f5 | 3242 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3243 | return -EINVAL; |
3244 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3245 | area->vm_private_data = substream; | |
314e51b9 | 3246 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3247 | return 0; |
3248 | } | |
3249 | ||
3250 | /* | |
3251 | * mmap control record | |
3252 | */ | |
11bac800 | 3253 | static int snd_pcm_mmap_control_fault(struct vm_fault *vmf) |
1da177e4 | 3254 | { |
11bac800 | 3255 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3256 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3257 | |
3258 | if (substream == NULL) | |
3ad5afcd | 3259 | return VM_FAULT_SIGBUS; |
1da177e4 | 3260 | runtime = substream->runtime; |
3ad5afcd NP |
3261 | vmf->page = virt_to_page(runtime->control); |
3262 | get_page(vmf->page); | |
3263 | return 0; | |
1da177e4 LT |
3264 | } |
3265 | ||
f0f37e2f | 3266 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3267 | { |
3ad5afcd | 3268 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3269 | }; |
3270 | ||
877211f5 | 3271 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3272 | struct vm_area_struct *area) |
3273 | { | |
1da177e4 LT |
3274 | long size; |
3275 | if (!(area->vm_flags & VM_READ)) | |
3276 | return -EINVAL; | |
1da177e4 | 3277 | size = area->vm_end - area->vm_start; |
877211f5 | 3278 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3279 | return -EINVAL; |
3280 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3281 | area->vm_private_data = substream; | |
314e51b9 | 3282 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3283 | return 0; |
3284 | } | |
3285 | #else /* ! coherent mmap */ | |
3286 | /* | |
3287 | * don't support mmap for status and control records. | |
3288 | */ | |
877211f5 | 3289 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3290 | struct vm_area_struct *area) |
3291 | { | |
3292 | return -ENXIO; | |
3293 | } | |
877211f5 | 3294 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3295 | struct vm_area_struct *area) |
3296 | { | |
3297 | return -ENXIO; | |
3298 | } | |
3299 | #endif /* coherent mmap */ | |
3300 | ||
9eb4a067 TI |
3301 | static inline struct page * |
3302 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3303 | { | |
3304 | void *vaddr = substream->runtime->dma_area + ofs; | |
3305 | return virt_to_page(vaddr); | |
3306 | } | |
3307 | ||
1da177e4 | 3308 | /* |
3ad5afcd | 3309 | * fault callback for mmapping a RAM page |
1da177e4 | 3310 | */ |
11bac800 | 3311 | static int snd_pcm_mmap_data_fault(struct vm_fault *vmf) |
1da177e4 | 3312 | { |
11bac800 | 3313 | struct snd_pcm_substream *substream = vmf->vma->vm_private_data; |
877211f5 | 3314 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3315 | unsigned long offset; |
3316 | struct page * page; | |
1da177e4 LT |
3317 | size_t dma_bytes; |
3318 | ||
3319 | if (substream == NULL) | |
3ad5afcd | 3320 | return VM_FAULT_SIGBUS; |
1da177e4 | 3321 | runtime = substream->runtime; |
3ad5afcd | 3322 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3323 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3324 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3325 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3326 | if (substream->ops->page) |
1da177e4 | 3327 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3328 | else |
3329 | page = snd_pcm_default_page_ops(substream, offset); | |
3330 | if (!page) | |
3331 | return VM_FAULT_SIGBUS; | |
b5810039 | 3332 | get_page(page); |
3ad5afcd NP |
3333 | vmf->page = page; |
3334 | return 0; | |
1da177e4 LT |
3335 | } |
3336 | ||
657b1989 TI |
3337 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3338 | .open = snd_pcm_mmap_data_open, | |
3339 | .close = snd_pcm_mmap_data_close, | |
3340 | }; | |
3341 | ||
3342 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3343 | .open = snd_pcm_mmap_data_open, |
3344 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3345 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3346 | }; |
3347 | ||
3348 | /* | |
3349 | * mmap the DMA buffer on RAM | |
3350 | */ | |
30b771cf TI |
3351 | |
3352 | /** | |
3353 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3354 | * @substream: PCM substream | |
3355 | * @area: VMA | |
3356 | * | |
3357 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3358 | * this function is invoked implicitly. | |
3359 | */ | |
18a2b962 TI |
3360 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3361 | struct vm_area_struct *area) | |
1da177e4 | 3362 | { |
314e51b9 | 3363 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3364 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3365 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3366 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3367 | return remap_pfn_range(area, area->vm_start, | |
3368 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3369 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3370 | } | |
a5606f85 | 3371 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3372 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
657b1989 TI |
3373 | if (!substream->ops->page && |
3374 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3375 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3376 | area, | |
3377 | substream->runtime->dma_area, | |
3378 | substream->runtime->dma_addr, | |
3379 | area->vm_end - area->vm_start); | |
49d776ff | 3380 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3381 | /* mmap with fault handler */ |
3382 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3383 | return 0; |
3384 | } | |
18a2b962 | 3385 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3386 | |
3387 | /* | |
3388 | * mmap the DMA buffer on I/O memory area | |
3389 | */ | |
3390 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3391 | /** |
3392 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3393 | * @substream: PCM substream | |
3394 | * @area: VMA | |
3395 | * | |
3396 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3397 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3398 | * is supposed to work only on limited architectures. | |
3399 | */ | |
877211f5 TI |
3400 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3401 | struct vm_area_struct *area) | |
1da177e4 | 3402 | { |
0fe09a45 | 3403 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3404 | |
1da177e4 | 3405 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3406 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3407 | } |
e88e8ae6 TI |
3408 | |
3409 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3410 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3411 | ||
3412 | /* | |
3413 | * mmap DMA buffer | |
3414 | */ | |
877211f5 | 3415 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3416 | struct vm_area_struct *area) |
3417 | { | |
877211f5 | 3418 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3419 | long size; |
3420 | unsigned long offset; | |
3421 | size_t dma_bytes; | |
657b1989 | 3422 | int err; |
1da177e4 LT |
3423 | |
3424 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3425 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3426 | return -EINVAL; | |
3427 | } else { | |
3428 | if (!(area->vm_flags & VM_READ)) | |
3429 | return -EINVAL; | |
3430 | } | |
3431 | runtime = substream->runtime; | |
1da177e4 LT |
3432 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3433 | return -EBADFD; | |
3434 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3435 | return -ENXIO; | |
3436 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3437 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3438 | return -EINVAL; | |
3439 | size = area->vm_end - area->vm_start; | |
3440 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3441 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3442 | if ((size_t)size > dma_bytes) | |
3443 | return -EINVAL; | |
3444 | if (offset > dma_bytes - size) | |
3445 | return -EINVAL; | |
3446 | ||
657b1989 TI |
3447 | area->vm_ops = &snd_pcm_vm_ops_data; |
3448 | area->vm_private_data = substream; | |
1da177e4 | 3449 | if (substream->ops->mmap) |
657b1989 | 3450 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3451 | else |
18a2b962 | 3452 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3453 | if (!err) |
3454 | atomic_inc(&substream->mmap_count); | |
3455 | return err; | |
1da177e4 LT |
3456 | } |
3457 | ||
e88e8ae6 TI |
3458 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3459 | ||
1da177e4 LT |
3460 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3461 | { | |
877211f5 TI |
3462 | struct snd_pcm_file * pcm_file; |
3463 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3464 | unsigned long offset; |
3465 | ||
3466 | pcm_file = file->private_data; | |
3467 | substream = pcm_file->substream; | |
7eaa943c TI |
3468 | if (PCM_RUNTIME_CHECK(substream)) |
3469 | return -ENXIO; | |
1da177e4 LT |
3470 | |
3471 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3472 | switch (offset) { | |
3473 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3474 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3475 | return -ENXIO; |
3476 | return snd_pcm_mmap_status(substream, file, area); | |
3477 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3478 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3479 | return -ENXIO; |
3480 | return snd_pcm_mmap_control(substream, file, area); | |
3481 | default: | |
3482 | return snd_pcm_mmap_data(substream, file, area); | |
3483 | } | |
3484 | return 0; | |
3485 | } | |
3486 | ||
3487 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3488 | { | |
877211f5 TI |
3489 | struct snd_pcm_file * pcm_file; |
3490 | struct snd_pcm_substream *substream; | |
3491 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3492 | |
3493 | pcm_file = file->private_data; | |
3494 | substream = pcm_file->substream; | |
7eaa943c | 3495 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3496 | return -ENXIO; |
1da177e4 | 3497 | runtime = substream->runtime; |
d05468b7 | 3498 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3499 | } |
3500 | ||
3501 | /* | |
3502 | * ioctl32 compat | |
3503 | */ | |
3504 | #ifdef CONFIG_COMPAT | |
3505 | #include "pcm_compat.c" | |
3506 | #else | |
3507 | #define snd_pcm_ioctl_compat NULL | |
3508 | #endif | |
3509 | ||
3510 | /* | |
3511 | * To be removed helpers to keep binary compatibility | |
3512 | */ | |
3513 | ||
59d48582 | 3514 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3515 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3516 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3517 | ||
877211f5 TI |
3518 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3519 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3520 | { |
3521 | unsigned int i; | |
3522 | ||
3523 | memset(params, 0, sizeof(*params)); | |
3524 | params->flags = oparams->flags; | |
3525 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3526 | params->masks[i].bits[0] = oparams->masks[i]; | |
3527 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3528 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3529 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3530 | params->info = oparams->info; | |
3531 | params->msbits = oparams->msbits; | |
3532 | params->rate_num = oparams->rate_num; | |
3533 | params->rate_den = oparams->rate_den; | |
3534 | params->fifo_size = oparams->fifo_size; | |
3535 | } | |
3536 | ||
877211f5 TI |
3537 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3538 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3539 | { |
3540 | unsigned int i; | |
3541 | ||
3542 | memset(oparams, 0, sizeof(*oparams)); | |
3543 | oparams->flags = params->flags; | |
3544 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3545 | oparams->masks[i] = params->masks[i].bits[0]; | |
3546 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3547 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3548 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3549 | oparams->info = params->info; | |
3550 | oparams->msbits = params->msbits; | |
3551 | oparams->rate_num = params->rate_num; | |
3552 | oparams->rate_den = params->rate_den; | |
3553 | oparams->fifo_size = params->fifo_size; | |
3554 | } | |
3555 | ||
877211f5 TI |
3556 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3557 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3558 | { |
877211f5 TI |
3559 | struct snd_pcm_hw_params *params; |
3560 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3561 | int err; |
3562 | ||
3563 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3564 | if (!params) |
3565 | return -ENOMEM; | |
1da177e4 | 3566 | |
ef44a1ec LZ |
3567 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3568 | if (IS_ERR(oparams)) { | |
3569 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3570 | goto out; |
3571 | } | |
3572 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3573 | err = snd_pcm_hw_refine(substream, params); | |
3574 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3575 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3576 | if (!err) | |
3577 | err = -EFAULT; | |
3578 | } | |
ef44a1ec LZ |
3579 | |
3580 | kfree(oparams); | |
1da177e4 LT |
3581 | out: |
3582 | kfree(params); | |
1da177e4 LT |
3583 | return err; |
3584 | } | |
3585 | ||
877211f5 TI |
3586 | static int snd_pcm_hw_params_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; | |
3596 | ||
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_params(substream, params); | |
3604 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3605 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3606 | if (!err) | |
3607 | err = -EFAULT; | |
3608 | } | |
ef44a1ec LZ |
3609 | |
3610 | kfree(oparams); | |
1da177e4 LT |
3611 | out: |
3612 | kfree(params); | |
1da177e4 LT |
3613 | return err; |
3614 | } | |
59d48582 | 3615 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3616 | |
7003609b | 3617 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3618 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3619 | unsigned long addr, | |
3620 | unsigned long len, | |
3621 | unsigned long pgoff, | |
3622 | unsigned long flags) | |
3623 | { | |
3624 | struct snd_pcm_file *pcm_file = file->private_data; | |
3625 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3626 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3627 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3628 | ||
3629 | switch (offset) { | |
3630 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3631 | return (unsigned long)runtime->status; | |
3632 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3633 | return (unsigned long)runtime->control; | |
3634 | default: | |
3635 | return (unsigned long)runtime->dma_area + offset; | |
3636 | } | |
7003609b CC |
3637 | } |
3638 | #else | |
55c63bd2 | 3639 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3640 | #endif |
3641 | ||
1da177e4 LT |
3642 | /* |
3643 | * Register section | |
3644 | */ | |
3645 | ||
9c2e08c5 | 3646 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3647 | { |
2af677fc CL |
3648 | .owner = THIS_MODULE, |
3649 | .write = snd_pcm_write, | |
1c65d986 | 3650 | .write_iter = snd_pcm_writev, |
f87135f5 | 3651 | .open = snd_pcm_playback_open, |
2af677fc | 3652 | .release = snd_pcm_release, |
02f4865f | 3653 | .llseek = no_llseek, |
2af677fc CL |
3654 | .poll = snd_pcm_playback_poll, |
3655 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3656 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3657 | .mmap = snd_pcm_mmap, | |
3658 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3659 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3660 | }, |
3661 | { | |
2af677fc CL |
3662 | .owner = THIS_MODULE, |
3663 | .read = snd_pcm_read, | |
1c65d986 | 3664 | .read_iter = snd_pcm_readv, |
f87135f5 | 3665 | .open = snd_pcm_capture_open, |
2af677fc | 3666 | .release = snd_pcm_release, |
02f4865f | 3667 | .llseek = no_llseek, |
2af677fc CL |
3668 | .poll = snd_pcm_capture_poll, |
3669 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3670 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3671 | .mmap = snd_pcm_mmap, | |
3672 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3673 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3674 | } |
3675 | }; |