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> | |
26 | #include <linux/time.h> | |
e8db0be1 | 27 | #include <linux/pm_qos.h> |
6cbbfe1c | 28 | #include <linux/io.h> |
657b1989 | 29 | #include <linux/dma-mapping.h> |
1da177e4 LT |
30 | #include <sound/core.h> |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | #include <sound/pcm.h> | |
34 | #include <sound/pcm_params.h> | |
35 | #include <sound/timer.h> | |
36 | #include <sound/minors.h> | |
e2e40f2c | 37 | #include <linux/uio.h> |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Compatibility | |
41 | */ | |
42 | ||
877211f5 | 43 | struct snd_pcm_hw_params_old { |
1da177e4 LT |
44 | unsigned int flags; |
45 | unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - | |
46 | SNDRV_PCM_HW_PARAM_ACCESS + 1]; | |
877211f5 | 47 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - |
1da177e4 LT |
48 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; |
49 | unsigned int rmask; | |
50 | unsigned int cmask; | |
51 | unsigned int info; | |
52 | unsigned int msbits; | |
53 | unsigned int rate_num; | |
54 | unsigned int rate_den; | |
877211f5 | 55 | snd_pcm_uframes_t fifo_size; |
1da177e4 LT |
56 | unsigned char reserved[64]; |
57 | }; | |
58 | ||
59d48582 | 59 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
877211f5 TI |
60 | #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) |
61 | #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) | |
1da177e4 | 62 | |
877211f5 TI |
63 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
64 | struct snd_pcm_hw_params_old __user * _oparams); | |
65 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, | |
66 | struct snd_pcm_hw_params_old __user * _oparams); | |
59d48582 | 67 | #endif |
f87135f5 | 68 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); |
1da177e4 LT |
69 | |
70 | /* | |
71 | * | |
72 | */ | |
73 | ||
7af142f7 TI |
74 | static DEFINE_RWLOCK(snd_pcm_link_rwlock); |
75 | static DECLARE_RWSEM(snd_pcm_link_rwsem); | |
1da177e4 | 76 | |
67ec1072 TI |
77 | /* Writer in rwsem may block readers even during its waiting in queue, |
78 | * and this may lead to a deadlock when the code path takes read sem | |
79 | * twice (e.g. one in snd_pcm_action_nonatomic() and another in | |
80 | * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to | |
81 | * spin until it gets the lock. | |
82 | */ | |
83 | static inline void down_write_nonblock(struct rw_semaphore *lock) | |
84 | { | |
85 | while (!down_write_trylock(lock)) | |
86 | cond_resched(); | |
87 | } | |
88 | ||
30b771cf TI |
89 | /** |
90 | * snd_pcm_stream_lock - Lock the PCM stream | |
91 | * @substream: PCM substream | |
92 | * | |
93 | * This locks the PCM stream's spinlock or mutex depending on the nonatomic | |
94 | * flag of the given substream. This also takes the global link rw lock | |
95 | * (or rw sem), too, for avoiding the race with linked streams. | |
96 | */ | |
7af142f7 TI |
97 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
98 | { | |
99 | if (substream->pcm->nonatomic) { | |
67756e31 | 100 | down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); |
7af142f7 TI |
101 | mutex_lock(&substream->self_group.mutex); |
102 | } else { | |
103 | read_lock(&snd_pcm_link_rwlock); | |
104 | spin_lock(&substream->self_group.lock); | |
105 | } | |
106 | } | |
107 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); | |
108 | ||
30b771cf TI |
109 | /** |
110 | * snd_pcm_stream_lock - Unlock the PCM stream | |
111 | * @substream: PCM substream | |
112 | * | |
113 | * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). | |
114 | */ | |
7af142f7 TI |
115 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
116 | { | |
117 | if (substream->pcm->nonatomic) { | |
118 | mutex_unlock(&substream->self_group.mutex); | |
119 | up_read(&snd_pcm_link_rwsem); | |
120 | } else { | |
121 | spin_unlock(&substream->self_group.lock); | |
122 | read_unlock(&snd_pcm_link_rwlock); | |
123 | } | |
124 | } | |
125 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); | |
126 | ||
30b771cf TI |
127 | /** |
128 | * snd_pcm_stream_lock_irq - Lock the PCM stream | |
129 | * @substream: PCM substream | |
130 | * | |
131 | * This locks the PCM stream like snd_pcm_stream_lock() and disables the local | |
132 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical | |
133 | * as snd_pcm_stream_lock(). | |
134 | */ | |
7af142f7 TI |
135 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
136 | { | |
137 | if (!substream->pcm->nonatomic) | |
138 | local_irq_disable(); | |
139 | snd_pcm_stream_lock(substream); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); | |
142 | ||
30b771cf TI |
143 | /** |
144 | * snd_pcm_stream_unlock_irq - Unlock the PCM stream | |
145 | * @substream: PCM substream | |
146 | * | |
147 | * This is a counter-part of snd_pcm_stream_lock_irq(). | |
148 | */ | |
7af142f7 TI |
149 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
150 | { | |
151 | snd_pcm_stream_unlock(substream); | |
152 | if (!substream->pcm->nonatomic) | |
153 | local_irq_enable(); | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); | |
156 | ||
157 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) | |
158 | { | |
159 | unsigned long flags = 0; | |
160 | if (!substream->pcm->nonatomic) | |
161 | local_irq_save(flags); | |
162 | snd_pcm_stream_lock(substream); | |
163 | return flags; | |
164 | } | |
165 | EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); | |
166 | ||
30b771cf TI |
167 | /** |
168 | * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream | |
169 | * @substream: PCM substream | |
170 | * @flags: irq flags | |
171 | * | |
172 | * This is a counter-part of snd_pcm_stream_lock_irqsave(). | |
173 | */ | |
7af142f7 TI |
174 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
175 | unsigned long flags) | |
176 | { | |
177 | snd_pcm_stream_unlock(substream); | |
178 | if (!substream->pcm->nonatomic) | |
179 | local_irq_restore(flags); | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); | |
1da177e4 LT |
182 | |
183 | static inline mm_segment_t snd_enter_user(void) | |
184 | { | |
185 | mm_segment_t fs = get_fs(); | |
186 | set_fs(get_ds()); | |
187 | return fs; | |
188 | } | |
189 | ||
190 | static inline void snd_leave_user(mm_segment_t fs) | |
191 | { | |
192 | set_fs(fs); | |
193 | } | |
194 | ||
195 | ||
196 | ||
877211f5 | 197 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) |
1da177e4 | 198 | { |
877211f5 TI |
199 | struct snd_pcm_runtime *runtime; |
200 | struct snd_pcm *pcm = substream->pcm; | |
201 | struct snd_pcm_str *pstr = substream->pstr; | |
1da177e4 | 202 | |
1da177e4 LT |
203 | memset(info, 0, sizeof(*info)); |
204 | info->card = pcm->card->number; | |
205 | info->device = pcm->device; | |
206 | info->stream = substream->stream; | |
207 | info->subdevice = substream->number; | |
208 | strlcpy(info->id, pcm->id, sizeof(info->id)); | |
209 | strlcpy(info->name, pcm->name, sizeof(info->name)); | |
210 | info->dev_class = pcm->dev_class; | |
211 | info->dev_subclass = pcm->dev_subclass; | |
212 | info->subdevices_count = pstr->substream_count; | |
213 | info->subdevices_avail = pstr->substream_count - pstr->substream_opened; | |
214 | strlcpy(info->subname, substream->name, sizeof(info->subname)); | |
215 | runtime = substream->runtime; | |
216 | /* AB: FIXME!!! This is definitely nonsense */ | |
217 | if (runtime) { | |
218 | info->sync = runtime->sync; | |
219 | substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); | |
220 | } | |
221 | return 0; | |
222 | } | |
223 | ||
877211f5 TI |
224 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
225 | struct snd_pcm_info __user * _info) | |
1da177e4 | 226 | { |
877211f5 | 227 | struct snd_pcm_info *info; |
1da177e4 LT |
228 | int err; |
229 | ||
230 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
231 | if (! info) | |
232 | return -ENOMEM; | |
233 | err = snd_pcm_info(substream, info); | |
234 | if (err >= 0) { | |
235 | if (copy_to_user(_info, info, sizeof(*info))) | |
236 | err = -EFAULT; | |
237 | } | |
238 | kfree(info); | |
239 | return err; | |
240 | } | |
241 | ||
63825f3a TI |
242 | static bool hw_support_mmap(struct snd_pcm_substream *substream) |
243 | { | |
244 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) | |
245 | return false; | |
246 | /* check architectures that return -EINVAL from dma_mmap_coherent() */ | |
247 | /* FIXME: this should be some global flag */ | |
248 | #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ | |
249 | defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) | |
250 | if (!substream->ops->mmap && | |
251 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
252 | return false; | |
253 | #endif | |
254 | return true; | |
255 | } | |
256 | ||
1da177e4 LT |
257 | #undef RULES_DEBUG |
258 | ||
259 | #ifdef RULES_DEBUG | |
260 | #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v | |
47023ec7 | 261 | static const char * const snd_pcm_hw_param_names[] = { |
1da177e4 LT |
262 | HW_PARAM(ACCESS), |
263 | HW_PARAM(FORMAT), | |
264 | HW_PARAM(SUBFORMAT), | |
265 | HW_PARAM(SAMPLE_BITS), | |
266 | HW_PARAM(FRAME_BITS), | |
267 | HW_PARAM(CHANNELS), | |
268 | HW_PARAM(RATE), | |
269 | HW_PARAM(PERIOD_TIME), | |
270 | HW_PARAM(PERIOD_SIZE), | |
271 | HW_PARAM(PERIOD_BYTES), | |
272 | HW_PARAM(PERIODS), | |
273 | HW_PARAM(BUFFER_TIME), | |
274 | HW_PARAM(BUFFER_SIZE), | |
275 | HW_PARAM(BUFFER_BYTES), | |
276 | HW_PARAM(TICK_TIME), | |
277 | }; | |
278 | #endif | |
279 | ||
877211f5 TI |
280 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, |
281 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
282 | { |
283 | unsigned int k; | |
877211f5 TI |
284 | struct snd_pcm_hardware *hw; |
285 | struct snd_interval *i = NULL; | |
286 | struct snd_mask *m = NULL; | |
287 | struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; | |
1da177e4 LT |
288 | unsigned int rstamps[constrs->rules_num]; |
289 | unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; | |
290 | unsigned int stamp = 2; | |
291 | int changed, again; | |
292 | ||
293 | params->info = 0; | |
294 | params->fifo_size = 0; | |
295 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) | |
296 | params->msbits = 0; | |
297 | if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { | |
298 | params->rate_num = 0; | |
299 | params->rate_den = 0; | |
300 | } | |
301 | ||
302 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
303 | m = hw_param_mask(params, k); | |
304 | if (snd_mask_empty(m)) | |
305 | return -EINVAL; | |
306 | if (!(params->rmask & (1 << k))) | |
307 | continue; | |
308 | #ifdef RULES_DEBUG | |
09e56df8 TI |
309 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
310 | pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); | |
1da177e4 LT |
311 | #endif |
312 | changed = snd_mask_refine(m, constrs_mask(constrs, k)); | |
313 | #ifdef RULES_DEBUG | |
09e56df8 | 314 | pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); |
1da177e4 LT |
315 | #endif |
316 | if (changed) | |
317 | params->cmask |= 1 << k; | |
318 | if (changed < 0) | |
319 | return changed; | |
320 | } | |
321 | ||
322 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
323 | i = hw_param_interval(params, k); | |
324 | if (snd_interval_empty(i)) | |
325 | return -EINVAL; | |
326 | if (!(params->rmask & (1 << k))) | |
327 | continue; | |
328 | #ifdef RULES_DEBUG | |
09e56df8 | 329 | pr_debug("%s = ", snd_pcm_hw_param_names[k]); |
1da177e4 | 330 | if (i->empty) |
09e56df8 | 331 | pr_cont("empty"); |
1da177e4 | 332 | else |
09e56df8 | 333 | pr_cont("%c%u %u%c", |
1da177e4 LT |
334 | i->openmin ? '(' : '[', i->min, |
335 | i->max, i->openmax ? ')' : ']'); | |
09e56df8 | 336 | pr_cont(" -> "); |
1da177e4 LT |
337 | #endif |
338 | changed = snd_interval_refine(i, constrs_interval(constrs, k)); | |
339 | #ifdef RULES_DEBUG | |
340 | if (i->empty) | |
09e56df8 | 341 | pr_cont("empty\n"); |
1da177e4 | 342 | else |
09e56df8 | 343 | pr_cont("%c%u %u%c\n", |
1da177e4 LT |
344 | i->openmin ? '(' : '[', i->min, |
345 | i->max, i->openmax ? ')' : ']'); | |
346 | #endif | |
347 | if (changed) | |
348 | params->cmask |= 1 << k; | |
349 | if (changed < 0) | |
350 | return changed; | |
351 | } | |
352 | ||
353 | for (k = 0; k < constrs->rules_num; k++) | |
354 | rstamps[k] = 0; | |
355 | for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
356 | vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; | |
357 | do { | |
358 | again = 0; | |
359 | for (k = 0; k < constrs->rules_num; k++) { | |
877211f5 | 360 | struct snd_pcm_hw_rule *r = &constrs->rules[k]; |
1da177e4 LT |
361 | unsigned int d; |
362 | int doit = 0; | |
363 | if (r->cond && !(r->cond & params->flags)) | |
364 | continue; | |
365 | for (d = 0; r->deps[d] >= 0; d++) { | |
366 | if (vstamps[r->deps[d]] > rstamps[k]) { | |
367 | doit = 1; | |
368 | break; | |
369 | } | |
370 | } | |
371 | if (!doit) | |
372 | continue; | |
373 | #ifdef RULES_DEBUG | |
09e56df8 | 374 | pr_debug("Rule %d [%p]: ", k, r->func); |
1da177e4 | 375 | if (r->var >= 0) { |
09e56df8 | 376 | pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); |
1da177e4 LT |
377 | if (hw_is_mask(r->var)) { |
378 | m = hw_param_mask(params, r->var); | |
09e56df8 | 379 | pr_cont("%x", *m->bits); |
1da177e4 LT |
380 | } else { |
381 | i = hw_param_interval(params, r->var); | |
382 | if (i->empty) | |
09e56df8 | 383 | pr_cont("empty"); |
1da177e4 | 384 | else |
09e56df8 | 385 | pr_cont("%c%u %u%c", |
1da177e4 LT |
386 | i->openmin ? '(' : '[', i->min, |
387 | i->max, i->openmax ? ')' : ']'); | |
388 | } | |
389 | } | |
390 | #endif | |
391 | changed = r->func(params, r); | |
392 | #ifdef RULES_DEBUG | |
393 | if (r->var >= 0) { | |
09e56df8 | 394 | pr_cont(" -> "); |
1da177e4 | 395 | if (hw_is_mask(r->var)) |
09e56df8 | 396 | pr_cont("%x", *m->bits); |
1da177e4 LT |
397 | else { |
398 | if (i->empty) | |
09e56df8 | 399 | pr_cont("empty"); |
1da177e4 | 400 | else |
09e56df8 | 401 | pr_cont("%c%u %u%c", |
1da177e4 LT |
402 | i->openmin ? '(' : '[', i->min, |
403 | i->max, i->openmax ? ')' : ']'); | |
404 | } | |
405 | } | |
09e56df8 | 406 | pr_cont("\n"); |
1da177e4 LT |
407 | #endif |
408 | rstamps[k] = stamp; | |
409 | if (changed && r->var >= 0) { | |
410 | params->cmask |= (1 << r->var); | |
411 | vstamps[r->var] = stamp; | |
412 | again = 1; | |
413 | } | |
414 | if (changed < 0) | |
415 | return changed; | |
416 | stamp++; | |
417 | } | |
418 | } while (again); | |
419 | if (!params->msbits) { | |
420 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
421 | if (snd_interval_single(i)) | |
422 | params->msbits = snd_interval_value(i); | |
423 | } | |
424 | ||
425 | if (!params->rate_den) { | |
426 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
427 | if (snd_interval_single(i)) { | |
428 | params->rate_num = snd_interval_value(i); | |
429 | params->rate_den = 1; | |
430 | } | |
431 | } | |
432 | ||
433 | hw = &substream->runtime->hw; | |
63825f3a | 434 | if (!params->info) { |
48d88297 LY |
435 | params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | |
436 | SNDRV_PCM_INFO_DRAIN_TRIGGER); | |
63825f3a TI |
437 | if (!hw_support_mmap(substream)) |
438 | params->info &= ~(SNDRV_PCM_INFO_MMAP | | |
439 | SNDRV_PCM_INFO_MMAP_VALID); | |
440 | } | |
8bea869c | 441 | if (!params->fifo_size) { |
3be522a9 JK |
442 | m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
443 | i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
444 | if (snd_mask_min(m) == snd_mask_max(m) && | |
445 | snd_interval_min(i) == snd_interval_max(i)) { | |
8bea869c JK |
446 | changed = substream->ops->ioctl(substream, |
447 | SNDRV_PCM_IOCTL1_FIFO_SIZE, params); | |
8bd9bca3 | 448 | if (changed < 0) |
8bea869c JK |
449 | return changed; |
450 | } | |
451 | } | |
1da177e4 LT |
452 | params->rmask = 0; |
453 | return 0; | |
454 | } | |
455 | ||
e88e8ae6 TI |
456 | EXPORT_SYMBOL(snd_pcm_hw_refine); |
457 | ||
877211f5 TI |
458 | static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, |
459 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 460 | { |
877211f5 | 461 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
462 | int err; |
463 | ||
ef44a1ec LZ |
464 | params = memdup_user(_params, sizeof(*params)); |
465 | if (IS_ERR(params)) | |
466 | return PTR_ERR(params); | |
467 | ||
1da177e4 LT |
468 | err = snd_pcm_hw_refine(substream, params); |
469 | if (copy_to_user(_params, params, sizeof(*params))) { | |
470 | if (!err) | |
471 | err = -EFAULT; | |
472 | } | |
ef44a1ec | 473 | |
1da177e4 LT |
474 | kfree(params); |
475 | return err; | |
476 | } | |
477 | ||
9442e691 TI |
478 | static int period_to_usecs(struct snd_pcm_runtime *runtime) |
479 | { | |
480 | int usecs; | |
481 | ||
482 | if (! runtime->rate) | |
483 | return -1; /* invalid */ | |
484 | ||
485 | /* take 75% of period time as the deadline */ | |
486 | usecs = (750000 / runtime->rate) * runtime->period_size; | |
487 | usecs += ((750000 % runtime->rate) * runtime->period_size) / | |
488 | runtime->rate; | |
489 | ||
490 | return usecs; | |
491 | } | |
492 | ||
9b0573c0 TI |
493 | static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) |
494 | { | |
495 | snd_pcm_stream_lock_irq(substream); | |
496 | if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) | |
497 | substream->runtime->status->state = state; | |
498 | snd_pcm_stream_unlock_irq(substream); | |
499 | } | |
500 | ||
90bbaf66 JY |
501 | static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, |
502 | int event) | |
503 | { | |
504 | #ifdef CONFIG_SND_PCM_TIMER | |
505 | if (substream->timer) | |
506 | snd_timer_notify(substream->timer, event, | |
507 | &substream->runtime->trigger_tstamp); | |
508 | #endif | |
509 | } | |
510 | ||
877211f5 TI |
511 | static int snd_pcm_hw_params(struct snd_pcm_substream *substream, |
512 | struct snd_pcm_hw_params *params) | |
1da177e4 | 513 | { |
877211f5 | 514 | struct snd_pcm_runtime *runtime; |
9442e691 | 515 | int err, usecs; |
1da177e4 LT |
516 | unsigned int bits; |
517 | snd_pcm_uframes_t frames; | |
518 | ||
7eaa943c TI |
519 | if (PCM_RUNTIME_CHECK(substream)) |
520 | return -ENXIO; | |
1da177e4 | 521 | runtime = substream->runtime; |
1da177e4 LT |
522 | snd_pcm_stream_lock_irq(substream); |
523 | switch (runtime->status->state) { | |
524 | case SNDRV_PCM_STATE_OPEN: | |
525 | case SNDRV_PCM_STATE_SETUP: | |
526 | case SNDRV_PCM_STATE_PREPARED: | |
527 | break; | |
528 | default: | |
529 | snd_pcm_stream_unlock_irq(substream); | |
530 | return -EBADFD; | |
531 | } | |
532 | snd_pcm_stream_unlock_irq(substream); | |
8eeaa2f9 | 533 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
534 | if (!substream->oss.oss) |
535 | #endif | |
9c323fcb | 536 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
537 | return -EBADFD; |
538 | ||
539 | params->rmask = ~0U; | |
540 | err = snd_pcm_hw_refine(substream, params); | |
541 | if (err < 0) | |
542 | goto _error; | |
543 | ||
544 | err = snd_pcm_hw_params_choose(substream, params); | |
545 | if (err < 0) | |
546 | goto _error; | |
547 | ||
548 | if (substream->ops->hw_params != NULL) { | |
549 | err = substream->ops->hw_params(substream, params); | |
550 | if (err < 0) | |
551 | goto _error; | |
552 | } | |
553 | ||
554 | runtime->access = params_access(params); | |
555 | runtime->format = params_format(params); | |
556 | runtime->subformat = params_subformat(params); | |
557 | runtime->channels = params_channels(params); | |
558 | runtime->rate = params_rate(params); | |
559 | runtime->period_size = params_period_size(params); | |
560 | runtime->periods = params_periods(params); | |
561 | runtime->buffer_size = params_buffer_size(params); | |
1da177e4 LT |
562 | runtime->info = params->info; |
563 | runtime->rate_num = params->rate_num; | |
564 | runtime->rate_den = params->rate_den; | |
ab69a490 CL |
565 | runtime->no_period_wakeup = |
566 | (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && | |
567 | (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); | |
1da177e4 LT |
568 | |
569 | bits = snd_pcm_format_physical_width(runtime->format); | |
570 | runtime->sample_bits = bits; | |
571 | bits *= runtime->channels; | |
572 | runtime->frame_bits = bits; | |
573 | frames = 1; | |
574 | while (bits % 8 != 0) { | |
575 | bits *= 2; | |
576 | frames *= 2; | |
577 | } | |
578 | runtime->byte_align = bits / 8; | |
579 | runtime->min_align = frames; | |
580 | ||
581 | /* Default sw params */ | |
582 | runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; | |
583 | runtime->period_step = 1; | |
1da177e4 | 584 | runtime->control->avail_min = runtime->period_size; |
1da177e4 LT |
585 | runtime->start_threshold = 1; |
586 | runtime->stop_threshold = runtime->buffer_size; | |
587 | runtime->silence_threshold = 0; | |
588 | runtime->silence_size = 0; | |
ead4046b CL |
589 | runtime->boundary = runtime->buffer_size; |
590 | while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) | |
591 | runtime->boundary *= 2; | |
1da177e4 LT |
592 | |
593 | snd_pcm_timer_resolution_change(substream); | |
9b0573c0 | 594 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); |
9442e691 | 595 | |
82f68251 JB |
596 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
597 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
9442e691 | 598 | if ((usecs = period_to_usecs(runtime)) >= 0) |
82f68251 JB |
599 | pm_qos_add_request(&substream->latency_pm_qos_req, |
600 | PM_QOS_CPU_DMA_LATENCY, usecs); | |
1da177e4 LT |
601 | return 0; |
602 | _error: | |
25985edc | 603 | /* hardware might be unusable from this time, |
1da177e4 LT |
604 | so we force application to retry to set |
605 | the correct hardware parameter settings */ | |
9b0573c0 | 606 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
1da177e4 LT |
607 | if (substream->ops->hw_free != NULL) |
608 | substream->ops->hw_free(substream); | |
609 | return err; | |
610 | } | |
611 | ||
877211f5 TI |
612 | static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, |
613 | struct snd_pcm_hw_params __user * _params) | |
1da177e4 | 614 | { |
877211f5 | 615 | struct snd_pcm_hw_params *params; |
1da177e4 LT |
616 | int err; |
617 | ||
ef44a1ec LZ |
618 | params = memdup_user(_params, sizeof(*params)); |
619 | if (IS_ERR(params)) | |
620 | return PTR_ERR(params); | |
621 | ||
1da177e4 LT |
622 | err = snd_pcm_hw_params(substream, params); |
623 | if (copy_to_user(_params, params, sizeof(*params))) { | |
624 | if (!err) | |
625 | err = -EFAULT; | |
626 | } | |
ef44a1ec | 627 | |
1da177e4 LT |
628 | kfree(params); |
629 | return err; | |
630 | } | |
631 | ||
877211f5 | 632 | static int snd_pcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 633 | { |
877211f5 | 634 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
635 | int result = 0; |
636 | ||
7eaa943c TI |
637 | if (PCM_RUNTIME_CHECK(substream)) |
638 | return -ENXIO; | |
1da177e4 | 639 | runtime = substream->runtime; |
1da177e4 LT |
640 | snd_pcm_stream_lock_irq(substream); |
641 | switch (runtime->status->state) { | |
642 | case SNDRV_PCM_STATE_SETUP: | |
643 | case SNDRV_PCM_STATE_PREPARED: | |
644 | break; | |
645 | default: | |
646 | snd_pcm_stream_unlock_irq(substream); | |
647 | return -EBADFD; | |
648 | } | |
649 | snd_pcm_stream_unlock_irq(substream); | |
9c323fcb | 650 | if (atomic_read(&substream->mmap_count)) |
1da177e4 LT |
651 | return -EBADFD; |
652 | if (substream->ops->hw_free) | |
653 | result = substream->ops->hw_free(substream); | |
9b0573c0 | 654 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); |
82f68251 | 655 | pm_qos_remove_request(&substream->latency_pm_qos_req); |
1da177e4 LT |
656 | return result; |
657 | } | |
658 | ||
877211f5 TI |
659 | static int snd_pcm_sw_params(struct snd_pcm_substream *substream, |
660 | struct snd_pcm_sw_params *params) | |
1da177e4 | 661 | { |
877211f5 | 662 | struct snd_pcm_runtime *runtime; |
1250932e | 663 | int err; |
1da177e4 | 664 | |
7eaa943c TI |
665 | if (PCM_RUNTIME_CHECK(substream)) |
666 | return -ENXIO; | |
1da177e4 | 667 | runtime = substream->runtime; |
1da177e4 LT |
668 | snd_pcm_stream_lock_irq(substream); |
669 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
670 | snd_pcm_stream_unlock_irq(substream); | |
671 | return -EBADFD; | |
672 | } | |
673 | snd_pcm_stream_unlock_irq(substream); | |
674 | ||
145d92e7 DC |
675 | if (params->tstamp_mode < 0 || |
676 | params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) | |
1da177e4 | 677 | return -EINVAL; |
58900810 TI |
678 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && |
679 | params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
5646eda5 | 680 | return -EINVAL; |
1da177e4 LT |
681 | if (params->avail_min == 0) |
682 | return -EINVAL; | |
1da177e4 LT |
683 | if (params->silence_size >= runtime->boundary) { |
684 | if (params->silence_threshold != 0) | |
685 | return -EINVAL; | |
686 | } else { | |
687 | if (params->silence_size > params->silence_threshold) | |
688 | return -EINVAL; | |
689 | if (params->silence_threshold > runtime->buffer_size) | |
690 | return -EINVAL; | |
691 | } | |
1250932e | 692 | err = 0; |
1da177e4 LT |
693 | snd_pcm_stream_lock_irq(substream); |
694 | runtime->tstamp_mode = params->tstamp_mode; | |
58900810 TI |
695 | if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) |
696 | runtime->tstamp_type = params->tstamp_type; | |
1da177e4 LT |
697 | runtime->period_step = params->period_step; |
698 | runtime->control->avail_min = params->avail_min; | |
699 | runtime->start_threshold = params->start_threshold; | |
700 | runtime->stop_threshold = params->stop_threshold; | |
701 | runtime->silence_threshold = params->silence_threshold; | |
702 | runtime->silence_size = params->silence_size; | |
1da177e4 LT |
703 | params->boundary = runtime->boundary; |
704 | if (snd_pcm_running(substream)) { | |
1da177e4 LT |
705 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
706 | runtime->silence_size > 0) | |
707 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1250932e | 708 | err = snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
709 | } |
710 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 711 | return err; |
1da177e4 LT |
712 | } |
713 | ||
877211f5 TI |
714 | static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, |
715 | struct snd_pcm_sw_params __user * _params) | |
1da177e4 | 716 | { |
877211f5 | 717 | struct snd_pcm_sw_params params; |
1da177e4 LT |
718 | int err; |
719 | if (copy_from_user(¶ms, _params, sizeof(params))) | |
720 | return -EFAULT; | |
721 | err = snd_pcm_sw_params(substream, ¶ms); | |
722 | if (copy_to_user(_params, ¶ms, sizeof(params))) | |
723 | return -EFAULT; | |
724 | return err; | |
725 | } | |
726 | ||
877211f5 TI |
727 | int snd_pcm_status(struct snd_pcm_substream *substream, |
728 | struct snd_pcm_status *status) | |
1da177e4 | 729 | { |
877211f5 | 730 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
731 | |
732 | snd_pcm_stream_lock_irq(substream); | |
3179f620 PLB |
733 | |
734 | snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, | |
735 | &runtime->audio_tstamp_config); | |
736 | ||
737 | /* backwards compatible behavior */ | |
738 | if (runtime->audio_tstamp_config.type_requested == | |
739 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { | |
740 | if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) | |
741 | runtime->audio_tstamp_config.type_requested = | |
742 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; | |
743 | else | |
744 | runtime->audio_tstamp_config.type_requested = | |
745 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; | |
746 | runtime->audio_tstamp_report.valid = 0; | |
747 | } else | |
748 | runtime->audio_tstamp_report.valid = 1; | |
749 | ||
1da177e4 LT |
750 | status->state = runtime->status->state; |
751 | status->suspended_state = runtime->status->suspended_state; | |
752 | if (status->state == SNDRV_PCM_STATE_OPEN) | |
753 | goto _end; | |
754 | status->trigger_tstamp = runtime->trigger_tstamp; | |
8c121586 | 755 | if (snd_pcm_running(substream)) { |
1da177e4 | 756 | snd_pcm_update_hw_ptr(substream); |
8c121586 JK |
757 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
758 | status->tstamp = runtime->status->tstamp; | |
3179f620 | 759 | status->driver_tstamp = runtime->driver_tstamp; |
4eeaaeae PLB |
760 | status->audio_tstamp = |
761 | runtime->status->audio_tstamp; | |
3179f620 PLB |
762 | if (runtime->audio_tstamp_report.valid == 1) |
763 | /* backwards compatibility, no report provided in COMPAT mode */ | |
764 | snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, | |
765 | &status->audio_tstamp_accuracy, | |
766 | &runtime->audio_tstamp_report); | |
767 | ||
8c121586 JK |
768 | goto _tstamp_end; |
769 | } | |
0d59b814 PLB |
770 | } else { |
771 | /* get tstamp only in fallback mode and only if enabled */ | |
772 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
773 | snd_pcm_gettime(runtime, &status->tstamp); | |
8c121586 | 774 | } |
8c121586 | 775 | _tstamp_end: |
1da177e4 LT |
776 | status->appl_ptr = runtime->control->appl_ptr; |
777 | status->hw_ptr = runtime->status->hw_ptr; | |
778 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
779 | status->avail = snd_pcm_playback_avail(runtime); | |
780 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || | |
4bbe1ddf | 781 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
1da177e4 | 782 | status->delay = runtime->buffer_size - status->avail; |
4bbe1ddf TI |
783 | status->delay += runtime->delay; |
784 | } else | |
1da177e4 LT |
785 | status->delay = 0; |
786 | } else { | |
787 | status->avail = snd_pcm_capture_avail(runtime); | |
788 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
4bbe1ddf | 789 | status->delay = status->avail + runtime->delay; |
1da177e4 LT |
790 | else |
791 | status->delay = 0; | |
792 | } | |
793 | status->avail_max = runtime->avail_max; | |
794 | status->overrange = runtime->overrange; | |
795 | runtime->avail_max = 0; | |
796 | runtime->overrange = 0; | |
797 | _end: | |
798 | snd_pcm_stream_unlock_irq(substream); | |
799 | return 0; | |
800 | } | |
801 | ||
877211f5 | 802 | static int snd_pcm_status_user(struct snd_pcm_substream *substream, |
38ca2a4d PLB |
803 | struct snd_pcm_status __user * _status, |
804 | bool ext) | |
1da177e4 | 805 | { |
877211f5 | 806 | struct snd_pcm_status status; |
1da177e4 | 807 | int res; |
38ca2a4d | 808 | |
1da177e4 | 809 | memset(&status, 0, sizeof(status)); |
38ca2a4d PLB |
810 | /* |
811 | * with extension, parameters are read/write, | |
812 | * get audio_tstamp_data from user, | |
813 | * ignore rest of status structure | |
814 | */ | |
815 | if (ext && get_user(status.audio_tstamp_data, | |
816 | (u32 __user *)(&_status->audio_tstamp_data))) | |
817 | return -EFAULT; | |
1da177e4 LT |
818 | res = snd_pcm_status(substream, &status); |
819 | if (res < 0) | |
820 | return res; | |
821 | if (copy_to_user(_status, &status, sizeof(status))) | |
822 | return -EFAULT; | |
823 | return 0; | |
824 | } | |
825 | ||
877211f5 TI |
826 | static int snd_pcm_channel_info(struct snd_pcm_substream *substream, |
827 | struct snd_pcm_channel_info * info) | |
1da177e4 | 828 | { |
877211f5 | 829 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
830 | unsigned int channel; |
831 | ||
1da177e4 LT |
832 | channel = info->channel; |
833 | runtime = substream->runtime; | |
834 | snd_pcm_stream_lock_irq(substream); | |
835 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
836 | snd_pcm_stream_unlock_irq(substream); | |
837 | return -EBADFD; | |
838 | } | |
839 | snd_pcm_stream_unlock_irq(substream); | |
840 | if (channel >= runtime->channels) | |
841 | return -EINVAL; | |
842 | memset(info, 0, sizeof(*info)); | |
843 | info->channel = channel; | |
844 | return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); | |
845 | } | |
846 | ||
877211f5 TI |
847 | static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, |
848 | struct snd_pcm_channel_info __user * _info) | |
1da177e4 | 849 | { |
877211f5 | 850 | struct snd_pcm_channel_info info; |
1da177e4 LT |
851 | int res; |
852 | ||
853 | if (copy_from_user(&info, _info, sizeof(info))) | |
854 | return -EFAULT; | |
855 | res = snd_pcm_channel_info(substream, &info); | |
856 | if (res < 0) | |
857 | return res; | |
858 | if (copy_to_user(_info, &info, sizeof(info))) | |
859 | return -EFAULT; | |
860 | return 0; | |
861 | } | |
862 | ||
877211f5 | 863 | static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) |
1da177e4 | 864 | { |
877211f5 | 865 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
866 | if (runtime->trigger_master == NULL) |
867 | return; | |
868 | if (runtime->trigger_master == substream) { | |
2b79d7a6 PLB |
869 | if (!runtime->trigger_tstamp_latched) |
870 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1da177e4 LT |
871 | } else { |
872 | snd_pcm_trigger_tstamp(runtime->trigger_master); | |
873 | runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; | |
874 | } | |
875 | runtime->trigger_master = NULL; | |
876 | } | |
877 | ||
878 | struct action_ops { | |
877211f5 TI |
879 | int (*pre_action)(struct snd_pcm_substream *substream, int state); |
880 | int (*do_action)(struct snd_pcm_substream *substream, int state); | |
881 | void (*undo_action)(struct snd_pcm_substream *substream, int state); | |
882 | void (*post_action)(struct snd_pcm_substream *substream, int state); | |
1da177e4 LT |
883 | }; |
884 | ||
885 | /* | |
886 | * this functions is core for handling of linked stream | |
887 | * Note: the stream state might be changed also on failure | |
888 | * Note2: call with calling stream lock + link lock | |
889 | */ | |
b17154cf | 890 | static int snd_pcm_action_group(const struct action_ops *ops, |
877211f5 | 891 | struct snd_pcm_substream *substream, |
1da177e4 LT |
892 | int state, int do_lock) |
893 | { | |
877211f5 TI |
894 | struct snd_pcm_substream *s = NULL; |
895 | struct snd_pcm_substream *s1; | |
dde1c652 | 896 | int res = 0, depth = 1; |
1da177e4 | 897 | |
ef991b95 | 898 | snd_pcm_group_for_each_entry(s, substream) { |
257f8cce TI |
899 | if (do_lock && s != substream) { |
900 | if (s->pcm->nonatomic) | |
dde1c652 | 901 | mutex_lock_nested(&s->self_group.mutex, depth); |
257f8cce | 902 | else |
dde1c652 TI |
903 | spin_lock_nested(&s->self_group.lock, depth); |
904 | depth++; | |
257f8cce | 905 | } |
1da177e4 LT |
906 | res = ops->pre_action(s, state); |
907 | if (res < 0) | |
908 | goto _unlock; | |
909 | } | |
ef991b95 | 910 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
911 | res = ops->do_action(s, state); |
912 | if (res < 0) { | |
913 | if (ops->undo_action) { | |
ef991b95 | 914 | snd_pcm_group_for_each_entry(s1, substream) { |
1da177e4 LT |
915 | if (s1 == s) /* failed stream */ |
916 | break; | |
917 | ops->undo_action(s1, state); | |
918 | } | |
919 | } | |
920 | s = NULL; /* unlock all */ | |
921 | goto _unlock; | |
922 | } | |
923 | } | |
ef991b95 | 924 | snd_pcm_group_for_each_entry(s, substream) { |
1da177e4 LT |
925 | ops->post_action(s, state); |
926 | } | |
927 | _unlock: | |
928 | if (do_lock) { | |
929 | /* unlock streams */ | |
ef991b95 | 930 | snd_pcm_group_for_each_entry(s1, substream) { |
257f8cce | 931 | if (s1 != substream) { |
811deede | 932 | if (s1->pcm->nonatomic) |
257f8cce TI |
933 | mutex_unlock(&s1->self_group.mutex); |
934 | else | |
935 | spin_unlock(&s1->self_group.lock); | |
936 | } | |
1da177e4 LT |
937 | if (s1 == s) /* end */ |
938 | break; | |
939 | } | |
940 | } | |
941 | return res; | |
942 | } | |
943 | ||
944 | /* | |
945 | * Note: call with stream lock | |
946 | */ | |
b17154cf | 947 | static int snd_pcm_action_single(const struct action_ops *ops, |
877211f5 | 948 | struct snd_pcm_substream *substream, |
1da177e4 LT |
949 | int state) |
950 | { | |
951 | int res; | |
952 | ||
953 | res = ops->pre_action(substream, state); | |
954 | if (res < 0) | |
955 | return res; | |
956 | res = ops->do_action(substream, state); | |
957 | if (res == 0) | |
958 | ops->post_action(substream, state); | |
959 | else if (ops->undo_action) | |
960 | ops->undo_action(substream, state); | |
961 | return res; | |
962 | } | |
963 | ||
aa8edd8c TI |
964 | /* |
965 | * Note: call with stream lock | |
966 | */ | |
b17154cf | 967 | static int snd_pcm_action(const struct action_ops *ops, |
aa8edd8c TI |
968 | struct snd_pcm_substream *substream, |
969 | int state) | |
257f8cce TI |
970 | { |
971 | int res; | |
972 | ||
aa8edd8c TI |
973 | if (!snd_pcm_stream_linked(substream)) |
974 | return snd_pcm_action_single(ops, substream, state); | |
975 | ||
976 | if (substream->pcm->nonatomic) { | |
257f8cce TI |
977 | if (!mutex_trylock(&substream->group->mutex)) { |
978 | mutex_unlock(&substream->self_group.mutex); | |
979 | mutex_lock(&substream->group->mutex); | |
980 | mutex_lock(&substream->self_group.mutex); | |
981 | } | |
982 | res = snd_pcm_action_group(ops, substream, state, 1); | |
983 | mutex_unlock(&substream->group->mutex); | |
984 | } else { | |
1da177e4 LT |
985 | if (!spin_trylock(&substream->group->lock)) { |
986 | spin_unlock(&substream->self_group.lock); | |
987 | spin_lock(&substream->group->lock); | |
988 | spin_lock(&substream->self_group.lock); | |
989 | } | |
990 | res = snd_pcm_action_group(ops, substream, state, 1); | |
991 | spin_unlock(&substream->group->lock); | |
1da177e4 LT |
992 | } |
993 | return res; | |
994 | } | |
995 | ||
996 | /* | |
997 | * Note: don't use any locks before | |
998 | */ | |
b17154cf | 999 | static int snd_pcm_action_lock_irq(const struct action_ops *ops, |
877211f5 | 1000 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1001 | int state) |
1002 | { | |
1003 | int res; | |
1004 | ||
e3a4bd5e TI |
1005 | snd_pcm_stream_lock_irq(substream); |
1006 | res = snd_pcm_action(ops, substream, state); | |
1007 | snd_pcm_stream_unlock_irq(substream); | |
1da177e4 LT |
1008 | return res; |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | */ | |
b17154cf | 1013 | static int snd_pcm_action_nonatomic(const struct action_ops *ops, |
877211f5 | 1014 | struct snd_pcm_substream *substream, |
1da177e4 LT |
1015 | int state) |
1016 | { | |
1017 | int res; | |
1018 | ||
1019 | down_read(&snd_pcm_link_rwsem); | |
1020 | if (snd_pcm_stream_linked(substream)) | |
1021 | res = snd_pcm_action_group(ops, substream, state, 0); | |
1022 | else | |
1023 | res = snd_pcm_action_single(ops, substream, state); | |
1024 | up_read(&snd_pcm_link_rwsem); | |
1025 | return res; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * start callbacks | |
1030 | */ | |
877211f5 | 1031 | static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1032 | { |
877211f5 | 1033 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1034 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) |
1035 | return -EBADFD; | |
1036 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1037 | !snd_pcm_playback_data(substream)) | |
1038 | return -EPIPE; | |
2b79d7a6 | 1039 | runtime->trigger_tstamp_latched = false; |
1da177e4 LT |
1040 | runtime->trigger_master = substream; |
1041 | return 0; | |
1042 | } | |
1043 | ||
877211f5 | 1044 | static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1045 | { |
1046 | if (substream->runtime->trigger_master != substream) | |
1047 | return 0; | |
1048 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); | |
1049 | } | |
1050 | ||
877211f5 | 1051 | static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1052 | { |
1053 | if (substream->runtime->trigger_master == substream) | |
1054 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1055 | } | |
1056 | ||
877211f5 | 1057 | static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1058 | { |
877211f5 | 1059 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1060 | snd_pcm_trigger_tstamp(substream); |
6af3fb72 | 1061 | runtime->hw_ptr_jiffies = jiffies; |
bd76af0f JK |
1062 | runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / |
1063 | runtime->rate; | |
1da177e4 LT |
1064 | runtime->status->state = state; |
1065 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1066 | runtime->silence_size > 0) | |
1067 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
90bbaf66 | 1068 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); |
1da177e4 LT |
1069 | } |
1070 | ||
b17154cf | 1071 | static const struct action_ops snd_pcm_action_start = { |
1da177e4 LT |
1072 | .pre_action = snd_pcm_pre_start, |
1073 | .do_action = snd_pcm_do_start, | |
1074 | .undo_action = snd_pcm_undo_start, | |
1075 | .post_action = snd_pcm_post_start | |
1076 | }; | |
1077 | ||
1078 | /** | |
1c85cc64 | 1079 | * snd_pcm_start - start all linked streams |
df8db936 | 1080 | * @substream: the PCM substream instance |
eb7c06e8 YB |
1081 | * |
1082 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1083 | */ |
877211f5 | 1084 | int snd_pcm_start(struct snd_pcm_substream *substream) |
1da177e4 | 1085 | { |
877211f5 TI |
1086 | return snd_pcm_action(&snd_pcm_action_start, substream, |
1087 | SNDRV_PCM_STATE_RUNNING); | |
1da177e4 LT |
1088 | } |
1089 | ||
1090 | /* | |
1091 | * stop callbacks | |
1092 | */ | |
877211f5 | 1093 | static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1094 | { |
877211f5 | 1095 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1096 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1097 | return -EBADFD; | |
1098 | runtime->trigger_master = substream; | |
1099 | return 0; | |
1100 | } | |
1101 | ||
877211f5 | 1102 | static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1103 | { |
1104 | if (substream->runtime->trigger_master == substream && | |
1105 | snd_pcm_running(substream)) | |
1106 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); | |
1107 | return 0; /* unconditonally stop all substreams */ | |
1108 | } | |
1109 | ||
877211f5 | 1110 | static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1111 | { |
877211f5 | 1112 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1113 | if (runtime->status->state != state) { |
1114 | snd_pcm_trigger_tstamp(substream); | |
9bc889b4 | 1115 | runtime->status->state = state; |
90bbaf66 | 1116 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); |
1da177e4 LT |
1117 | } |
1118 | wake_up(&runtime->sleep); | |
c91a988d | 1119 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1120 | } |
1121 | ||
b17154cf | 1122 | static const struct action_ops snd_pcm_action_stop = { |
1da177e4 LT |
1123 | .pre_action = snd_pcm_pre_stop, |
1124 | .do_action = snd_pcm_do_stop, | |
1125 | .post_action = snd_pcm_post_stop | |
1126 | }; | |
1127 | ||
1128 | /** | |
1c85cc64 | 1129 | * snd_pcm_stop - try to stop all running streams in the substream group |
df8db936 TI |
1130 | * @substream: the PCM substream instance |
1131 | * @state: PCM state after stopping the stream | |
1da177e4 | 1132 | * |
1c85cc64 | 1133 | * The state of each stream is then changed to the given state unconditionally. |
eb7c06e8 | 1134 | * |
0a11458c | 1135 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 1136 | */ |
fea952e5 | 1137 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) |
1da177e4 LT |
1138 | { |
1139 | return snd_pcm_action(&snd_pcm_action_stop, substream, state); | |
1140 | } | |
1141 | ||
e88e8ae6 TI |
1142 | EXPORT_SYMBOL(snd_pcm_stop); |
1143 | ||
1da177e4 | 1144 | /** |
1c85cc64 | 1145 | * snd_pcm_drain_done - stop the DMA only when the given stream is playback |
df8db936 | 1146 | * @substream: the PCM substream |
1da177e4 | 1147 | * |
1c85cc64 | 1148 | * After stopping, the state is changed to SETUP. |
1da177e4 | 1149 | * Unlike snd_pcm_stop(), this affects only the given stream. |
eb7c06e8 YB |
1150 | * |
1151 | * Return: Zero if succesful, or a negative error code. | |
1da177e4 | 1152 | */ |
877211f5 | 1153 | int snd_pcm_drain_done(struct snd_pcm_substream *substream) |
1da177e4 | 1154 | { |
877211f5 TI |
1155 | return snd_pcm_action_single(&snd_pcm_action_stop, substream, |
1156 | SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
1157 | } |
1158 | ||
1fb8510c TI |
1159 | /** |
1160 | * snd_pcm_stop_xrun - stop the running streams as XRUN | |
1161 | * @substream: the PCM substream instance | |
1fb8510c TI |
1162 | * |
1163 | * This stops the given running substream (and all linked substreams) as XRUN. | |
1164 | * Unlike snd_pcm_stop(), this function takes the substream lock by itself. | |
1165 | * | |
1166 | * Return: Zero if successful, or a negative error code. | |
1167 | */ | |
1168 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) | |
1169 | { | |
1170 | unsigned long flags; | |
1171 | int ret = 0; | |
1172 | ||
1173 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1174 | if (snd_pcm_running(substream)) | |
1175 | ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1176 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1177 | return ret; | |
1178 | } | |
1179 | EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); | |
1180 | ||
1da177e4 LT |
1181 | /* |
1182 | * pause callbacks | |
1183 | */ | |
877211f5 | 1184 | static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1185 | { |
877211f5 | 1186 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1187 | if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) |
1188 | return -ENOSYS; | |
1189 | if (push) { | |
1190 | if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) | |
1191 | return -EBADFD; | |
1192 | } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) | |
1193 | return -EBADFD; | |
1194 | runtime->trigger_master = substream; | |
1195 | return 0; | |
1196 | } | |
1197 | ||
877211f5 | 1198 | static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1199 | { |
1200 | if (substream->runtime->trigger_master != substream) | |
1201 | return 0; | |
56385a12 JK |
1202 | /* some drivers might use hw_ptr to recover from the pause - |
1203 | update the hw_ptr now */ | |
1204 | if (push) | |
1205 | snd_pcm_update_hw_ptr(substream); | |
6af3fb72 | 1206 | /* The jiffies check in snd_pcm_update_hw_ptr*() is done by |
b595076a | 1207 | * a delta between the current jiffies, this gives a large enough |
6af3fb72 TI |
1208 | * delta, effectively to skip the check once. |
1209 | */ | |
1210 | substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; | |
1da177e4 LT |
1211 | return substream->ops->trigger(substream, |
1212 | push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : | |
1213 | SNDRV_PCM_TRIGGER_PAUSE_RELEASE); | |
1214 | } | |
1215 | ||
877211f5 | 1216 | static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1217 | { |
1218 | if (substream->runtime->trigger_master == substream) | |
1219 | substream->ops->trigger(substream, | |
1220 | push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : | |
1221 | SNDRV_PCM_TRIGGER_PAUSE_PUSH); | |
1222 | } | |
1223 | ||
877211f5 | 1224 | static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 | 1225 | { |
877211f5 | 1226 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1227 | snd_pcm_trigger_tstamp(substream); |
1228 | if (push) { | |
1229 | runtime->status->state = SNDRV_PCM_STATE_PAUSED; | |
90bbaf66 | 1230 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); |
1da177e4 | 1231 | wake_up(&runtime->sleep); |
c91a988d | 1232 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1233 | } else { |
1234 | runtime->status->state = SNDRV_PCM_STATE_RUNNING; | |
90bbaf66 | 1235 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); |
1da177e4 LT |
1236 | } |
1237 | } | |
1238 | ||
b17154cf | 1239 | static const struct action_ops snd_pcm_action_pause = { |
1da177e4 LT |
1240 | .pre_action = snd_pcm_pre_pause, |
1241 | .do_action = snd_pcm_do_pause, | |
1242 | .undo_action = snd_pcm_undo_pause, | |
1243 | .post_action = snd_pcm_post_pause | |
1244 | }; | |
1245 | ||
1246 | /* | |
1247 | * Push/release the pause for all linked streams. | |
1248 | */ | |
877211f5 | 1249 | static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) |
1da177e4 LT |
1250 | { |
1251 | return snd_pcm_action(&snd_pcm_action_pause, substream, push); | |
1252 | } | |
1253 | ||
1254 | #ifdef CONFIG_PM | |
1255 | /* suspend */ | |
1256 | ||
877211f5 | 1257 | static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1258 | { |
877211f5 | 1259 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1260 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) |
1261 | return -EBUSY; | |
1262 | runtime->trigger_master = substream; | |
1263 | return 0; | |
1264 | } | |
1265 | ||
877211f5 | 1266 | static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1267 | { |
877211f5 | 1268 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1269 | if (runtime->trigger_master != substream) |
1270 | return 0; | |
1271 | if (! snd_pcm_running(substream)) | |
1272 | return 0; | |
1273 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1274 | return 0; /* suspend unconditionally */ | |
1275 | } | |
1276 | ||
877211f5 | 1277 | static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1278 | { |
877211f5 | 1279 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1280 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 TI |
1281 | runtime->status->suspended_state = runtime->status->state; |
1282 | runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; | |
90bbaf66 | 1283 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); |
1da177e4 | 1284 | wake_up(&runtime->sleep); |
c91a988d | 1285 | wake_up(&runtime->tsleep); |
1da177e4 LT |
1286 | } |
1287 | ||
b17154cf | 1288 | static const struct action_ops snd_pcm_action_suspend = { |
1da177e4 LT |
1289 | .pre_action = snd_pcm_pre_suspend, |
1290 | .do_action = snd_pcm_do_suspend, | |
1291 | .post_action = snd_pcm_post_suspend | |
1292 | }; | |
1293 | ||
1294 | /** | |
1c85cc64 | 1295 | * snd_pcm_suspend - trigger SUSPEND to all linked streams |
df8db936 | 1296 | * @substream: the PCM substream |
1da177e4 | 1297 | * |
1da177e4 | 1298 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1299 | * |
1300 | * Return: Zero if successful (or @substream is %NULL), or a negative error | |
1301 | * code. | |
1da177e4 | 1302 | */ |
877211f5 | 1303 | int snd_pcm_suspend(struct snd_pcm_substream *substream) |
1da177e4 LT |
1304 | { |
1305 | int err; | |
1306 | unsigned long flags; | |
1307 | ||
603bf524 TI |
1308 | if (! substream) |
1309 | return 0; | |
1310 | ||
1da177e4 LT |
1311 | snd_pcm_stream_lock_irqsave(substream, flags); |
1312 | err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); | |
1313 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1314 | return err; | |
1315 | } | |
1316 | ||
e88e8ae6 TI |
1317 | EXPORT_SYMBOL(snd_pcm_suspend); |
1318 | ||
1da177e4 | 1319 | /** |
1c85cc64 | 1320 | * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm |
df8db936 | 1321 | * @pcm: the PCM instance |
1da177e4 | 1322 | * |
1da177e4 | 1323 | * After this call, all streams are changed to SUSPENDED state. |
eb7c06e8 YB |
1324 | * |
1325 | * Return: Zero if successful (or @pcm is %NULL), or a negative error code. | |
1da177e4 | 1326 | */ |
877211f5 | 1327 | int snd_pcm_suspend_all(struct snd_pcm *pcm) |
1da177e4 | 1328 | { |
877211f5 | 1329 | struct snd_pcm_substream *substream; |
1da177e4 LT |
1330 | int stream, err = 0; |
1331 | ||
603bf524 TI |
1332 | if (! pcm) |
1333 | return 0; | |
1334 | ||
1da177e4 | 1335 | for (stream = 0; stream < 2; stream++) { |
877211f5 TI |
1336 | for (substream = pcm->streams[stream].substream; |
1337 | substream; substream = substream->next) { | |
1da177e4 LT |
1338 | /* FIXME: the open/close code should lock this as well */ |
1339 | if (substream->runtime == NULL) | |
1340 | continue; | |
1341 | err = snd_pcm_suspend(substream); | |
1342 | if (err < 0 && err != -EBUSY) | |
1343 | return err; | |
1344 | } | |
1345 | } | |
1346 | return 0; | |
1347 | } | |
1348 | ||
e88e8ae6 TI |
1349 | EXPORT_SYMBOL(snd_pcm_suspend_all); |
1350 | ||
1da177e4 LT |
1351 | /* resume */ |
1352 | ||
877211f5 | 1353 | static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1354 | { |
877211f5 | 1355 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1356 | if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) |
1357 | return -ENOSYS; | |
1358 | runtime->trigger_master = substream; | |
1359 | return 0; | |
1360 | } | |
1361 | ||
877211f5 | 1362 | static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1363 | { |
877211f5 | 1364 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1365 | if (runtime->trigger_master != substream) |
1366 | return 0; | |
1367 | /* DMA not running previously? */ | |
1368 | if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && | |
1369 | (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || | |
1370 | substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
1371 | return 0; | |
1372 | return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); | |
1373 | } | |
1374 | ||
877211f5 | 1375 | static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1376 | { |
1377 | if (substream->runtime->trigger_master == substream && | |
1378 | snd_pcm_running(substream)) | |
1379 | substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); | |
1380 | } | |
1381 | ||
877211f5 | 1382 | static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1383 | { |
877211f5 | 1384 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1385 | snd_pcm_trigger_tstamp(substream); |
9bc889b4 | 1386 | runtime->status->state = runtime->status->suspended_state; |
90bbaf66 | 1387 | snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); |
1da177e4 LT |
1388 | } |
1389 | ||
b17154cf | 1390 | static const struct action_ops snd_pcm_action_resume = { |
1da177e4 LT |
1391 | .pre_action = snd_pcm_pre_resume, |
1392 | .do_action = snd_pcm_do_resume, | |
1393 | .undo_action = snd_pcm_undo_resume, | |
1394 | .post_action = snd_pcm_post_resume | |
1395 | }; | |
1396 | ||
877211f5 | 1397 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 | 1398 | { |
877211f5 | 1399 | struct snd_card *card = substream->pcm->card; |
1da177e4 LT |
1400 | int res; |
1401 | ||
1402 | snd_power_lock(card); | |
cbac4b0c | 1403 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
1da177e4 LT |
1404 | res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); |
1405 | snd_power_unlock(card); | |
1406 | return res; | |
1407 | } | |
1408 | ||
1409 | #else | |
1410 | ||
877211f5 | 1411 | static int snd_pcm_resume(struct snd_pcm_substream *substream) |
1da177e4 LT |
1412 | { |
1413 | return -ENOSYS; | |
1414 | } | |
1415 | ||
1416 | #endif /* CONFIG_PM */ | |
1417 | ||
1418 | /* | |
1419 | * xrun ioctl | |
1420 | * | |
1421 | * Change the RUNNING stream(s) to XRUN state. | |
1422 | */ | |
877211f5 | 1423 | static int snd_pcm_xrun(struct snd_pcm_substream *substream) |
1da177e4 | 1424 | { |
877211f5 TI |
1425 | struct snd_card *card = substream->pcm->card; |
1426 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1427 | int result; |
1428 | ||
1429 | snd_power_lock(card); | |
1430 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1431 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
1da177e4 LT |
1432 | if (result < 0) |
1433 | goto _unlock; | |
1434 | } | |
1435 | ||
1436 | snd_pcm_stream_lock_irq(substream); | |
1437 | switch (runtime->status->state) { | |
1438 | case SNDRV_PCM_STATE_XRUN: | |
1439 | result = 0; /* already there */ | |
1440 | break; | |
1441 | case SNDRV_PCM_STATE_RUNNING: | |
1442 | result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
1443 | break; | |
1444 | default: | |
1445 | result = -EBADFD; | |
1446 | } | |
1447 | snd_pcm_stream_unlock_irq(substream); | |
1448 | _unlock: | |
1449 | snd_power_unlock(card); | |
1450 | return result; | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * reset ioctl | |
1455 | */ | |
877211f5 | 1456 | static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1457 | { |
877211f5 | 1458 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1459 | switch (runtime->status->state) { |
1460 | case SNDRV_PCM_STATE_RUNNING: | |
1461 | case SNDRV_PCM_STATE_PREPARED: | |
1462 | case SNDRV_PCM_STATE_PAUSED: | |
1463 | case SNDRV_PCM_STATE_SUSPENDED: | |
1464 | return 0; | |
1465 | default: | |
1466 | return -EBADFD; | |
1467 | } | |
1468 | } | |
1469 | ||
877211f5 | 1470 | static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1471 | { |
877211f5 | 1472 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1473 | int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); |
1474 | if (err < 0) | |
1475 | return err; | |
1da177e4 | 1476 | runtime->hw_ptr_base = 0; |
e7636925 JK |
1477 | runtime->hw_ptr_interrupt = runtime->status->hw_ptr - |
1478 | runtime->status->hw_ptr % runtime->period_size; | |
1da177e4 LT |
1479 | runtime->silence_start = runtime->status->hw_ptr; |
1480 | runtime->silence_filled = 0; | |
1481 | return 0; | |
1482 | } | |
1483 | ||
877211f5 | 1484 | static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1485 | { |
877211f5 | 1486 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1487 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
1488 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
1489 | runtime->silence_size > 0) | |
1490 | snd_pcm_playback_silence(substream, ULONG_MAX); | |
1491 | } | |
1492 | ||
b17154cf | 1493 | static const struct action_ops snd_pcm_action_reset = { |
1da177e4 LT |
1494 | .pre_action = snd_pcm_pre_reset, |
1495 | .do_action = snd_pcm_do_reset, | |
1496 | .post_action = snd_pcm_post_reset | |
1497 | }; | |
1498 | ||
877211f5 | 1499 | static int snd_pcm_reset(struct snd_pcm_substream *substream) |
1da177e4 LT |
1500 | { |
1501 | return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * prepare ioctl | |
1506 | */ | |
0df63e44 TI |
1507 | /* we use the second argument for updating f_flags */ |
1508 | static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, | |
1509 | int f_flags) | |
1da177e4 | 1510 | { |
877211f5 | 1511 | struct snd_pcm_runtime *runtime = substream->runtime; |
de1b8b93 TI |
1512 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
1513 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) | |
1da177e4 LT |
1514 | return -EBADFD; |
1515 | if (snd_pcm_running(substream)) | |
1516 | return -EBUSY; | |
0df63e44 | 1517 | substream->f_flags = f_flags; |
1da177e4 LT |
1518 | return 0; |
1519 | } | |
1520 | ||
877211f5 | 1521 | static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1522 | { |
1523 | int err; | |
1524 | err = substream->ops->prepare(substream); | |
1525 | if (err < 0) | |
1526 | return err; | |
1527 | return snd_pcm_do_reset(substream, 0); | |
1528 | } | |
1529 | ||
877211f5 | 1530 | static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1531 | { |
877211f5 | 1532 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1533 | runtime->control->appl_ptr = runtime->status->hw_ptr; |
9b0573c0 | 1534 | snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); |
1da177e4 LT |
1535 | } |
1536 | ||
b17154cf | 1537 | static const struct action_ops snd_pcm_action_prepare = { |
1da177e4 LT |
1538 | .pre_action = snd_pcm_pre_prepare, |
1539 | .do_action = snd_pcm_do_prepare, | |
1540 | .post_action = snd_pcm_post_prepare | |
1541 | }; | |
1542 | ||
1543 | /** | |
1c85cc64 | 1544 | * snd_pcm_prepare - prepare the PCM substream to be triggerable |
df8db936 | 1545 | * @substream: the PCM substream instance |
0df63e44 | 1546 | * @file: file to refer f_flags |
eb7c06e8 YB |
1547 | * |
1548 | * Return: Zero if successful, or a negative error code. | |
1da177e4 | 1549 | */ |
0df63e44 TI |
1550 | static int snd_pcm_prepare(struct snd_pcm_substream *substream, |
1551 | struct file *file) | |
1da177e4 LT |
1552 | { |
1553 | int res; | |
877211f5 | 1554 | struct snd_card *card = substream->pcm->card; |
0df63e44 TI |
1555 | int f_flags; |
1556 | ||
1557 | if (file) | |
1558 | f_flags = file->f_flags; | |
1559 | else | |
1560 | f_flags = substream->f_flags; | |
1da177e4 LT |
1561 | |
1562 | snd_power_lock(card); | |
cbac4b0c | 1563 | if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) |
0df63e44 TI |
1564 | res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, |
1565 | substream, f_flags); | |
1da177e4 LT |
1566 | snd_power_unlock(card); |
1567 | return res; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * drain ioctl | |
1572 | */ | |
1573 | ||
877211f5 | 1574 | static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1575 | { |
4f7c39dc TI |
1576 | struct snd_pcm_runtime *runtime = substream->runtime; |
1577 | switch (runtime->status->state) { | |
1578 | case SNDRV_PCM_STATE_OPEN: | |
1579 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1580 | case SNDRV_PCM_STATE_SUSPENDED: | |
1581 | return -EBADFD; | |
1582 | } | |
1583 | runtime->trigger_master = substream; | |
1da177e4 LT |
1584 | return 0; |
1585 | } | |
1586 | ||
877211f5 | 1587 | static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 | 1588 | { |
877211f5 | 1589 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1590 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
1591 | switch (runtime->status->state) { | |
1592 | case SNDRV_PCM_STATE_PREPARED: | |
1593 | /* start playback stream if possible */ | |
1594 | if (! snd_pcm_playback_empty(substream)) { | |
1595 | snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); | |
1596 | snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); | |
70372a75 TI |
1597 | } else { |
1598 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1da177e4 LT |
1599 | } |
1600 | break; | |
1601 | case SNDRV_PCM_STATE_RUNNING: | |
1602 | runtime->status->state = SNDRV_PCM_STATE_DRAINING; | |
1603 | break; | |
4f7c39dc TI |
1604 | case SNDRV_PCM_STATE_XRUN: |
1605 | runtime->status->state = SNDRV_PCM_STATE_SETUP; | |
1606 | break; | |
1da177e4 LT |
1607 | default: |
1608 | break; | |
1609 | } | |
1610 | } else { | |
1611 | /* stop running stream */ | |
1612 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { | |
b05e5787 | 1613 | int new_state = snd_pcm_capture_avail(runtime) > 0 ? |
1da177e4 | 1614 | SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; |
b05e5787 MŚ |
1615 | snd_pcm_do_stop(substream, new_state); |
1616 | snd_pcm_post_stop(substream, new_state); | |
1da177e4 LT |
1617 | } |
1618 | } | |
48d88297 LY |
1619 | |
1620 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && | |
1621 | runtime->trigger_master == substream && | |
1622 | (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) | |
1623 | return substream->ops->trigger(substream, | |
1624 | SNDRV_PCM_TRIGGER_DRAIN); | |
1625 | ||
1da177e4 LT |
1626 | return 0; |
1627 | } | |
1628 | ||
877211f5 | 1629 | static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) |
1da177e4 LT |
1630 | { |
1631 | } | |
1632 | ||
b17154cf | 1633 | static const struct action_ops snd_pcm_action_drain_init = { |
1da177e4 LT |
1634 | .pre_action = snd_pcm_pre_drain_init, |
1635 | .do_action = snd_pcm_do_drain_init, | |
1636 | .post_action = snd_pcm_post_drain_init | |
1637 | }; | |
1638 | ||
877211f5 | 1639 | static int snd_pcm_drop(struct snd_pcm_substream *substream); |
1da177e4 LT |
1640 | |
1641 | /* | |
1642 | * Drain the stream(s). | |
1643 | * When the substream is linked, sync until the draining of all playback streams | |
1644 | * is finished. | |
1645 | * After this call, all streams are supposed to be either SETUP or DRAINING | |
1646 | * (capture only) state. | |
1647 | */ | |
4cdc115f TI |
1648 | static int snd_pcm_drain(struct snd_pcm_substream *substream, |
1649 | struct file *file) | |
1da177e4 | 1650 | { |
877211f5 TI |
1651 | struct snd_card *card; |
1652 | struct snd_pcm_runtime *runtime; | |
ef991b95 | 1653 | struct snd_pcm_substream *s; |
d3a7dcfe | 1654 | wait_queue_t wait; |
1da177e4 | 1655 | int result = 0; |
4cdc115f | 1656 | int nonblock = 0; |
1da177e4 | 1657 | |
1da177e4 LT |
1658 | card = substream->pcm->card; |
1659 | runtime = substream->runtime; | |
1660 | ||
1661 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
1662 | return -EBADFD; | |
1663 | ||
1da177e4 LT |
1664 | snd_power_lock(card); |
1665 | if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { | |
cbac4b0c | 1666 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
21cb2a2e TI |
1667 | if (result < 0) { |
1668 | snd_power_unlock(card); | |
1669 | return result; | |
1670 | } | |
1da177e4 LT |
1671 | } |
1672 | ||
4cdc115f TI |
1673 | if (file) { |
1674 | if (file->f_flags & O_NONBLOCK) | |
1675 | nonblock = 1; | |
1676 | } else if (substream->f_flags & O_NONBLOCK) | |
1677 | nonblock = 1; | |
1678 | ||
21cb2a2e | 1679 | down_read(&snd_pcm_link_rwsem); |
21cb2a2e TI |
1680 | snd_pcm_stream_lock_irq(substream); |
1681 | /* resume pause */ | |
d3a7dcfe | 1682 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) |
21cb2a2e TI |
1683 | snd_pcm_pause(substream, 0); |
1684 | ||
1685 | /* pre-start/stop - all running streams are changed to DRAINING state */ | |
1686 | result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); | |
4cdc115f TI |
1687 | if (result < 0) |
1688 | goto unlock; | |
1689 | /* in non-blocking, we don't wait in ioctl but let caller poll */ | |
1690 | if (nonblock) { | |
1691 | result = -EAGAIN; | |
1692 | goto unlock; | |
21cb2a2e | 1693 | } |
1da177e4 LT |
1694 | |
1695 | for (;;) { | |
1696 | long tout; | |
d3a7dcfe | 1697 | struct snd_pcm_runtime *to_check; |
1da177e4 LT |
1698 | if (signal_pending(current)) { |
1699 | result = -ERESTARTSYS; | |
1700 | break; | |
1701 | } | |
d3a7dcfe TI |
1702 | /* find a substream to drain */ |
1703 | to_check = NULL; | |
1704 | snd_pcm_group_for_each_entry(s, substream) { | |
1705 | if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) | |
1706 | continue; | |
1707 | runtime = s->runtime; | |
1708 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
1709 | to_check = runtime; | |
21cb2a2e | 1710 | break; |
d3a7dcfe | 1711 | } |
21cb2a2e | 1712 | } |
d3a7dcfe TI |
1713 | if (!to_check) |
1714 | break; /* all drained */ | |
1715 | init_waitqueue_entry(&wait, current); | |
1716 | add_wait_queue(&to_check->sleep, &wait); | |
1da177e4 | 1717 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1718 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1719 | snd_power_unlock(card); |
f2b3614c TI |
1720 | if (runtime->no_period_wakeup) |
1721 | tout = MAX_SCHEDULE_TIMEOUT; | |
1722 | else { | |
1723 | tout = 10; | |
1724 | if (runtime->rate) { | |
1725 | long t = runtime->period_size * 2 / runtime->rate; | |
1726 | tout = max(t, tout); | |
1727 | } | |
1728 | tout = msecs_to_jiffies(tout * 1000); | |
1729 | } | |
1730 | tout = schedule_timeout_interruptible(tout); | |
1da177e4 | 1731 | snd_power_lock(card); |
d3a7dcfe | 1732 | down_read(&snd_pcm_link_rwsem); |
1da177e4 | 1733 | snd_pcm_stream_lock_irq(substream); |
d3a7dcfe | 1734 | remove_wait_queue(&to_check->sleep, &wait); |
0914f796 TI |
1735 | if (card->shutdown) { |
1736 | result = -ENODEV; | |
1737 | break; | |
1738 | } | |
1da177e4 LT |
1739 | if (tout == 0) { |
1740 | if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1741 | result = -ESTRPIPE; | |
1742 | else { | |
09e56df8 TI |
1743 | dev_dbg(substream->pcm->card->dev, |
1744 | "playback drain error (DMA or IRQ trouble?)\n"); | |
1da177e4 LT |
1745 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1746 | result = -EIO; | |
1747 | } | |
1748 | break; | |
1749 | } | |
1da177e4 | 1750 | } |
21cb2a2e | 1751 | |
4cdc115f | 1752 | unlock: |
21cb2a2e | 1753 | snd_pcm_stream_unlock_irq(substream); |
d3a7dcfe | 1754 | up_read(&snd_pcm_link_rwsem); |
1da177e4 | 1755 | snd_power_unlock(card); |
1da177e4 LT |
1756 | |
1757 | return result; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * drop ioctl | |
1762 | * | |
1763 | * Immediately put all linked substreams into SETUP state. | |
1764 | */ | |
877211f5 | 1765 | static int snd_pcm_drop(struct snd_pcm_substream *substream) |
1da177e4 | 1766 | { |
877211f5 | 1767 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1768 | int result = 0; |
1769 | ||
7eaa943c TI |
1770 | if (PCM_RUNTIME_CHECK(substream)) |
1771 | return -ENXIO; | |
1da177e4 | 1772 | runtime = substream->runtime; |
1da177e4 | 1773 | |
de1b8b93 | 1774 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN || |
24e8fc49 TI |
1775 | runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || |
1776 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) | |
1da177e4 LT |
1777 | return -EBADFD; |
1778 | ||
1da177e4 LT |
1779 | snd_pcm_stream_lock_irq(substream); |
1780 | /* resume pause */ | |
1781 | if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) | |
1782 | snd_pcm_pause(substream, 0); | |
1783 | ||
1784 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1785 | /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ | |
1786 | snd_pcm_stream_unlock_irq(substream); | |
24e8fc49 | 1787 | |
1da177e4 LT |
1788 | return result; |
1789 | } | |
1790 | ||
1791 | ||
0888c321 | 1792 | static bool is_pcm_file(struct file *file) |
1da177e4 | 1793 | { |
0888c321 | 1794 | struct inode *inode = file_inode(file); |
f87135f5 CL |
1795 | unsigned int minor; |
1796 | ||
0888c321 AV |
1797 | if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) |
1798 | return false; | |
1da177e4 | 1799 | minor = iminor(inode); |
0888c321 AV |
1800 | return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || |
1801 | snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
1da177e4 LT |
1802 | } |
1803 | ||
1804 | /* | |
1805 | * PCM link handling | |
1806 | */ | |
877211f5 | 1807 | static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) |
1da177e4 LT |
1808 | { |
1809 | int res = 0; | |
877211f5 TI |
1810 | struct snd_pcm_file *pcm_file; |
1811 | struct snd_pcm_substream *substream1; | |
1662591b | 1812 | struct snd_pcm_group *group; |
0888c321 | 1813 | struct fd f = fdget(fd); |
1da177e4 | 1814 | |
0888c321 | 1815 | if (!f.file) |
1da177e4 | 1816 | return -EBADFD; |
0888c321 AV |
1817 | if (!is_pcm_file(f.file)) { |
1818 | res = -EBADFD; | |
1819 | goto _badf; | |
1820 | } | |
1821 | pcm_file = f.file->private_data; | |
1da177e4 | 1822 | substream1 = pcm_file->substream; |
1662591b TI |
1823 | group = kmalloc(sizeof(*group), GFP_KERNEL); |
1824 | if (!group) { | |
1825 | res = -ENOMEM; | |
1826 | goto _nolock; | |
1827 | } | |
67ec1072 | 1828 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1829 | write_lock_irq(&snd_pcm_link_rwlock); |
1830 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || | |
257f8cce TI |
1831 | substream->runtime->status->state != substream1->runtime->status->state || |
1832 | substream->pcm->nonatomic != substream1->pcm->nonatomic) { | |
1da177e4 LT |
1833 | res = -EBADFD; |
1834 | goto _end; | |
1835 | } | |
1836 | if (snd_pcm_stream_linked(substream1)) { | |
1837 | res = -EALREADY; | |
1838 | goto _end; | |
1839 | } | |
1840 | if (!snd_pcm_stream_linked(substream)) { | |
1662591b | 1841 | substream->group = group; |
dd6c5cd8 | 1842 | group = NULL; |
1da177e4 | 1843 | spin_lock_init(&substream->group->lock); |
257f8cce | 1844 | mutex_init(&substream->group->mutex); |
1da177e4 LT |
1845 | INIT_LIST_HEAD(&substream->group->substreams); |
1846 | list_add_tail(&substream->link_list, &substream->group->substreams); | |
1847 | substream->group->count = 1; | |
1848 | } | |
1849 | list_add_tail(&substream1->link_list, &substream->group->substreams); | |
1850 | substream->group->count++; | |
1851 | substream1->group = substream->group; | |
1852 | _end: | |
1853 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1854 | up_write(&snd_pcm_link_rwsem); | |
1662591b | 1855 | _nolock: |
a0830dbd | 1856 | snd_card_unref(substream1->pcm->card); |
dd6c5cd8 | 1857 | kfree(group); |
0888c321 AV |
1858 | _badf: |
1859 | fdput(f); | |
1da177e4 LT |
1860 | return res; |
1861 | } | |
1862 | ||
877211f5 | 1863 | static void relink_to_local(struct snd_pcm_substream *substream) |
1da177e4 LT |
1864 | { |
1865 | substream->group = &substream->self_group; | |
1866 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
1867 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
1868 | } | |
1869 | ||
877211f5 | 1870 | static int snd_pcm_unlink(struct snd_pcm_substream *substream) |
1da177e4 | 1871 | { |
ef991b95 | 1872 | struct snd_pcm_substream *s; |
1da177e4 LT |
1873 | int res = 0; |
1874 | ||
67ec1072 | 1875 | down_write_nonblock(&snd_pcm_link_rwsem); |
1da177e4 LT |
1876 | write_lock_irq(&snd_pcm_link_rwlock); |
1877 | if (!snd_pcm_stream_linked(substream)) { | |
1878 | res = -EALREADY; | |
1879 | goto _end; | |
1880 | } | |
1881 | list_del(&substream->link_list); | |
1882 | substream->group->count--; | |
1883 | if (substream->group->count == 1) { /* detach the last stream, too */ | |
ef991b95 TI |
1884 | snd_pcm_group_for_each_entry(s, substream) { |
1885 | relink_to_local(s); | |
1da177e4 LT |
1886 | break; |
1887 | } | |
1888 | kfree(substream->group); | |
1889 | } | |
1890 | relink_to_local(substream); | |
1891 | _end: | |
1892 | write_unlock_irq(&snd_pcm_link_rwlock); | |
1893 | up_write(&snd_pcm_link_rwsem); | |
1894 | return res; | |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | * hw configurator | |
1899 | */ | |
877211f5 TI |
1900 | static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, |
1901 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1902 | { |
877211f5 | 1903 | struct snd_interval t; |
1da177e4 LT |
1904 | snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), |
1905 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1906 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1907 | } | |
1908 | ||
877211f5 TI |
1909 | static int snd_pcm_hw_rule_div(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_div(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_muldivk(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_muldivk(hw_param_interval_c(params, rule->deps[0]), |
1923 | hw_param_interval_c(params, rule->deps[1]), | |
1924 | (unsigned long) rule->private, &t); | |
1925 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1926 | } | |
1927 | ||
877211f5 TI |
1928 | static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, |
1929 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1930 | { |
877211f5 | 1931 | struct snd_interval t; |
1da177e4 LT |
1932 | snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), |
1933 | (unsigned long) rule->private, | |
1934 | hw_param_interval_c(params, rule->deps[1]), &t); | |
1935 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1936 | } | |
1937 | ||
877211f5 TI |
1938 | static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, |
1939 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1940 | { |
1941 | unsigned int k; | |
877211f5 TI |
1942 | struct snd_interval *i = hw_param_interval(params, rule->deps[0]); |
1943 | struct snd_mask m; | |
1944 | struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
1da177e4 LT |
1945 | snd_mask_any(&m); |
1946 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1947 | int bits; | |
1948 | if (! snd_mask_test(mask, k)) | |
1949 | continue; | |
1950 | bits = snd_pcm_format_physical_width(k); | |
1951 | if (bits <= 0) | |
1952 | continue; /* ignore invalid formats */ | |
1953 | if ((unsigned)bits < i->min || (unsigned)bits > i->max) | |
1954 | snd_mask_reset(&m, k); | |
1955 | } | |
1956 | return snd_mask_refine(mask, &m); | |
1957 | } | |
1958 | ||
877211f5 TI |
1959 | static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, |
1960 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1961 | { |
877211f5 | 1962 | struct snd_interval t; |
1da177e4 LT |
1963 | unsigned int k; |
1964 | t.min = UINT_MAX; | |
1965 | t.max = 0; | |
1966 | t.openmin = 0; | |
1967 | t.openmax = 0; | |
1968 | for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { | |
1969 | int bits; | |
1970 | if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) | |
1971 | continue; | |
1972 | bits = snd_pcm_format_physical_width(k); | |
1973 | if (bits <= 0) | |
1974 | continue; /* ignore invalid formats */ | |
1975 | if (t.min > (unsigned)bits) | |
1976 | t.min = bits; | |
1977 | if (t.max < (unsigned)bits) | |
1978 | t.max = bits; | |
1979 | } | |
1980 | t.integer = 1; | |
1981 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
1982 | } | |
1983 | ||
1984 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
1985 | #error "Change this table" | |
1986 | #endif | |
1987 | ||
1988 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
1989 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
1990 | ||
7653d557 CL |
1991 | const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { |
1992 | .count = ARRAY_SIZE(rates), | |
1993 | .list = rates, | |
1994 | }; | |
1995 | ||
877211f5 TI |
1996 | static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, |
1997 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1998 | { |
877211f5 | 1999 | struct snd_pcm_hardware *hw = rule->private; |
1da177e4 | 2000 | return snd_interval_list(hw_param_interval(params, rule->var), |
7653d557 CL |
2001 | snd_pcm_known_rates.count, |
2002 | snd_pcm_known_rates.list, hw->rates); | |
1da177e4 LT |
2003 | } |
2004 | ||
877211f5 TI |
2005 | static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, |
2006 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 2007 | { |
877211f5 TI |
2008 | struct snd_interval t; |
2009 | struct snd_pcm_substream *substream = rule->private; | |
1da177e4 LT |
2010 | t.min = 0; |
2011 | t.max = substream->buffer_bytes_max; | |
2012 | t.openmin = 0; | |
2013 | t.openmax = 0; | |
2014 | t.integer = 1; | |
2015 | return snd_interval_refine(hw_param_interval(params, rule->var), &t); | |
2016 | } | |
2017 | ||
877211f5 | 2018 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) |
1da177e4 | 2019 | { |
877211f5 TI |
2020 | struct snd_pcm_runtime *runtime = substream->runtime; |
2021 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; | |
1da177e4 LT |
2022 | int k, err; |
2023 | ||
2024 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { | |
2025 | snd_mask_any(constrs_mask(constrs, k)); | |
2026 | } | |
2027 | ||
2028 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { | |
2029 | snd_interval_any(constrs_interval(constrs, k)); | |
2030 | } | |
2031 | ||
2032 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); | |
2033 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); | |
2034 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); | |
2035 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); | |
2036 | snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); | |
2037 | ||
2038 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
2039 | snd_pcm_hw_rule_format, NULL, | |
2040 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2041 | if (err < 0) | |
2042 | return err; | |
2043 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2044 | snd_pcm_hw_rule_sample_bits, NULL, | |
2045 | SNDRV_PCM_HW_PARAM_FORMAT, | |
2046 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2047 | if (err < 0) | |
2048 | return err; | |
2049 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, | |
2050 | snd_pcm_hw_rule_div, NULL, | |
2051 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2052 | if (err < 0) | |
2053 | return err; | |
2054 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2055 | snd_pcm_hw_rule_mul, NULL, | |
2056 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
2057 | if (err < 0) | |
2058 | return err; | |
2059 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2060 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2061 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2062 | if (err < 0) | |
2063 | return err; | |
2064 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, | |
2065 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2066 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); | |
2067 | if (err < 0) | |
2068 | return err; | |
2069 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2070 | snd_pcm_hw_rule_div, NULL, | |
2071 | SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
2072 | if (err < 0) | |
2073 | return err; | |
2074 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2075 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2076 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); | |
2077 | if (err < 0) | |
2078 | return err; | |
2079 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2080 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2081 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); | |
2082 | if (err < 0) | |
2083 | return err; | |
2084 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
2085 | snd_pcm_hw_rule_div, NULL, | |
2086 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
2087 | if (err < 0) | |
2088 | return err; | |
2089 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2090 | snd_pcm_hw_rule_div, NULL, | |
2091 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2092 | if (err < 0) | |
2093 | return err; | |
2094 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2095 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2096 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2097 | if (err < 0) | |
2098 | return err; | |
2099 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
2100 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2101 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2102 | if (err < 0) | |
2103 | return err; | |
2104 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2105 | snd_pcm_hw_rule_mul, NULL, | |
2106 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
2107 | if (err < 0) | |
2108 | return err; | |
2109 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2110 | snd_pcm_hw_rule_mulkdiv, (void*) 8, | |
2111 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2112 | if (err < 0) | |
2113 | return err; | |
2114 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
2115 | snd_pcm_hw_rule_muldivk, (void*) 1000000, | |
2116 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2117 | if (err < 0) | |
2118 | return err; | |
2119 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2120 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2121 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2122 | if (err < 0) | |
2123 | return err; | |
2124 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2125 | snd_pcm_hw_rule_muldivk, (void*) 8, | |
2126 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); | |
2127 | if (err < 0) | |
2128 | return err; | |
2129 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
2130 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2131 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2132 | if (err < 0) | |
2133 | return err; | |
2134 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
2135 | snd_pcm_hw_rule_mulkdiv, (void*) 1000000, | |
2136 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); | |
2137 | if (err < 0) | |
2138 | return err; | |
2139 | return 0; | |
2140 | } | |
2141 | ||
877211f5 | 2142 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) |
1da177e4 | 2143 | { |
877211f5 TI |
2144 | struct snd_pcm_runtime *runtime = substream->runtime; |
2145 | struct snd_pcm_hardware *hw = &runtime->hw; | |
1da177e4 LT |
2146 | int err; |
2147 | unsigned int mask = 0; | |
2148 | ||
2149 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) | |
2150 | mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; | |
2151 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2152 | mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; | |
63825f3a | 2153 | if (hw_support_mmap(substream)) { |
1da177e4 LT |
2154 | if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) |
2155 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; | |
2156 | if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) | |
2157 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; | |
2158 | if (hw->info & SNDRV_PCM_INFO_COMPLEX) | |
2159 | mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; | |
2160 | } | |
2161 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); | |
7eaa943c TI |
2162 | if (err < 0) |
2163 | return err; | |
1da177e4 LT |
2164 | |
2165 | err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); | |
7eaa943c TI |
2166 | if (err < 0) |
2167 | return err; | |
1da177e4 LT |
2168 | |
2169 | err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); | |
7eaa943c TI |
2170 | if (err < 0) |
2171 | return err; | |
1da177e4 LT |
2172 | |
2173 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, | |
2174 | hw->channels_min, hw->channels_max); | |
7eaa943c TI |
2175 | if (err < 0) |
2176 | return err; | |
1da177e4 LT |
2177 | |
2178 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, | |
2179 | hw->rate_min, hw->rate_max); | |
8b90ca08 GL |
2180 | if (err < 0) |
2181 | return err; | |
1da177e4 LT |
2182 | |
2183 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, | |
2184 | hw->period_bytes_min, hw->period_bytes_max); | |
8b90ca08 GL |
2185 | if (err < 0) |
2186 | return err; | |
1da177e4 LT |
2187 | |
2188 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, | |
2189 | hw->periods_min, hw->periods_max); | |
7eaa943c TI |
2190 | if (err < 0) |
2191 | return err; | |
1da177e4 LT |
2192 | |
2193 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2194 | hw->period_bytes_min, hw->buffer_bytes_max); | |
7eaa943c TI |
2195 | if (err < 0) |
2196 | return err; | |
1da177e4 LT |
2197 | |
2198 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, | |
2199 | snd_pcm_hw_rule_buffer_bytes_max, substream, | |
2200 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); | |
2201 | if (err < 0) | |
2202 | return err; | |
2203 | ||
2204 | /* FIXME: remove */ | |
2205 | if (runtime->dma_bytes) { | |
2206 | err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); | |
7eaa943c | 2207 | if (err < 0) |
6cf95152 | 2208 | return err; |
1da177e4 LT |
2209 | } |
2210 | ||
2211 | if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { | |
2212 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
2213 | snd_pcm_hw_rule_rate, hw, | |
2214 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
2215 | if (err < 0) | |
2216 | return err; | |
2217 | } | |
2218 | ||
2219 | /* FIXME: this belong to lowlevel */ | |
1da177e4 LT |
2220 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
2221 | ||
2222 | return 0; | |
2223 | } | |
2224 | ||
3bf75f9b | 2225 | static void pcm_release_private(struct snd_pcm_substream *substream) |
1da177e4 | 2226 | { |
1da177e4 | 2227 | snd_pcm_unlink(substream); |
3bf75f9b TI |
2228 | } |
2229 | ||
2230 | void snd_pcm_release_substream(struct snd_pcm_substream *substream) | |
2231 | { | |
0df63e44 TI |
2232 | substream->ref_count--; |
2233 | if (substream->ref_count > 0) | |
2234 | return; | |
2235 | ||
3bf75f9b | 2236 | snd_pcm_drop(substream); |
3bf75f9b | 2237 | if (substream->hw_opened) { |
094435d4 TI |
2238 | if (substream->ops->hw_free && |
2239 | substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
1da177e4 LT |
2240 | substream->ops->hw_free(substream); |
2241 | substream->ops->close(substream); | |
3bf75f9b | 2242 | substream->hw_opened = 0; |
1da177e4 | 2243 | } |
8699a0b6 TI |
2244 | if (pm_qos_request_active(&substream->latency_pm_qos_req)) |
2245 | pm_qos_remove_request(&substream->latency_pm_qos_req); | |
1576274d TI |
2246 | if (substream->pcm_release) { |
2247 | substream->pcm_release(substream); | |
2248 | substream->pcm_release = NULL; | |
2249 | } | |
3bf75f9b TI |
2250 | snd_pcm_detach_substream(substream); |
2251 | } | |
2252 | ||
e88e8ae6 TI |
2253 | EXPORT_SYMBOL(snd_pcm_release_substream); |
2254 | ||
3bf75f9b TI |
2255 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, |
2256 | struct file *file, | |
2257 | struct snd_pcm_substream **rsubstream) | |
2258 | { | |
2259 | struct snd_pcm_substream *substream; | |
2260 | int err; | |
2261 | ||
2262 | err = snd_pcm_attach_substream(pcm, stream, file, &substream); | |
2263 | if (err < 0) | |
2264 | return err; | |
0df63e44 TI |
2265 | if (substream->ref_count > 1) { |
2266 | *rsubstream = substream; | |
2267 | return 0; | |
2268 | } | |
2269 | ||
3bf75f9b TI |
2270 | err = snd_pcm_hw_constraints_init(substream); |
2271 | if (err < 0) { | |
09e56df8 | 2272 | pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); |
3bf75f9b TI |
2273 | goto error; |
2274 | } | |
2275 | ||
2276 | if ((err = substream->ops->open(substream)) < 0) | |
2277 | goto error; | |
2278 | ||
2279 | substream->hw_opened = 1; | |
2280 | ||
2281 | err = snd_pcm_hw_constraints_complete(substream); | |
2282 | if (err < 0) { | |
09e56df8 | 2283 | pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); |
3bf75f9b TI |
2284 | goto error; |
2285 | } | |
2286 | ||
2287 | *rsubstream = substream; | |
1da177e4 | 2288 | return 0; |
3bf75f9b TI |
2289 | |
2290 | error: | |
2291 | snd_pcm_release_substream(substream); | |
2292 | return err; | |
1da177e4 LT |
2293 | } |
2294 | ||
e88e8ae6 TI |
2295 | EXPORT_SYMBOL(snd_pcm_open_substream); |
2296 | ||
1da177e4 | 2297 | static int snd_pcm_open_file(struct file *file, |
877211f5 | 2298 | struct snd_pcm *pcm, |
ffd3d5c6 | 2299 | int stream) |
1da177e4 | 2300 | { |
877211f5 TI |
2301 | struct snd_pcm_file *pcm_file; |
2302 | struct snd_pcm_substream *substream; | |
3bf75f9b | 2303 | int err; |
1da177e4 | 2304 | |
3bf75f9b TI |
2305 | err = snd_pcm_open_substream(pcm, stream, file, &substream); |
2306 | if (err < 0) | |
2307 | return err; | |
2308 | ||
548a648b TI |
2309 | pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); |
2310 | if (pcm_file == NULL) { | |
2311 | snd_pcm_release_substream(substream); | |
2312 | return -ENOMEM; | |
2313 | } | |
2314 | pcm_file->substream = substream; | |
2315 | if (substream->ref_count == 1) { | |
0df63e44 TI |
2316 | substream->file = pcm_file; |
2317 | substream->pcm_release = pcm_release_private; | |
1da177e4 | 2318 | } |
1da177e4 | 2319 | file->private_data = pcm_file; |
ffd3d5c6 | 2320 | |
1da177e4 LT |
2321 | return 0; |
2322 | } | |
2323 | ||
f87135f5 CL |
2324 | static int snd_pcm_playback_open(struct inode *inode, struct file *file) |
2325 | { | |
2326 | struct snd_pcm *pcm; | |
02f4865f TI |
2327 | int err = nonseekable_open(inode, file); |
2328 | if (err < 0) | |
2329 | return err; | |
f87135f5 CL |
2330 | pcm = snd_lookup_minor_data(iminor(inode), |
2331 | SNDRV_DEVICE_TYPE_PCM_PLAYBACK); | |
a0830dbd | 2332 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); |
8bb4d9ce TI |
2333 | if (pcm) |
2334 | snd_card_unref(pcm->card); | |
a0830dbd | 2335 | return err; |
f87135f5 CL |
2336 | } |
2337 | ||
2338 | static int snd_pcm_capture_open(struct inode *inode, struct file *file) | |
1da177e4 | 2339 | { |
877211f5 | 2340 | struct snd_pcm *pcm; |
02f4865f TI |
2341 | int err = nonseekable_open(inode, file); |
2342 | if (err < 0) | |
2343 | return err; | |
f87135f5 CL |
2344 | pcm = snd_lookup_minor_data(iminor(inode), |
2345 | SNDRV_DEVICE_TYPE_PCM_CAPTURE); | |
a0830dbd | 2346 | err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); |
8bb4d9ce TI |
2347 | if (pcm) |
2348 | snd_card_unref(pcm->card); | |
a0830dbd | 2349 | return err; |
f87135f5 CL |
2350 | } |
2351 | ||
2352 | static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) | |
2353 | { | |
2354 | int err; | |
1da177e4 LT |
2355 | wait_queue_t wait; |
2356 | ||
1da177e4 LT |
2357 | if (pcm == NULL) { |
2358 | err = -ENODEV; | |
2359 | goto __error1; | |
2360 | } | |
2361 | err = snd_card_file_add(pcm->card, file); | |
2362 | if (err < 0) | |
2363 | goto __error1; | |
2364 | if (!try_module_get(pcm->card->module)) { | |
2365 | err = -EFAULT; | |
2366 | goto __error2; | |
2367 | } | |
2368 | init_waitqueue_entry(&wait, current); | |
2369 | add_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2370 | mutex_lock(&pcm->open_mutex); |
1da177e4 | 2371 | while (1) { |
ffd3d5c6 | 2372 | err = snd_pcm_open_file(file, pcm, stream); |
1da177e4 LT |
2373 | if (err >= 0) |
2374 | break; | |
2375 | if (err == -EAGAIN) { | |
2376 | if (file->f_flags & O_NONBLOCK) { | |
2377 | err = -EBUSY; | |
2378 | break; | |
2379 | } | |
2380 | } else | |
2381 | break; | |
2382 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 2383 | mutex_unlock(&pcm->open_mutex); |
1da177e4 | 2384 | schedule(); |
1a60d4c5 | 2385 | mutex_lock(&pcm->open_mutex); |
0914f796 TI |
2386 | if (pcm->card->shutdown) { |
2387 | err = -ENODEV; | |
2388 | break; | |
2389 | } | |
1da177e4 LT |
2390 | if (signal_pending(current)) { |
2391 | err = -ERESTARTSYS; | |
2392 | break; | |
2393 | } | |
2394 | } | |
2395 | remove_wait_queue(&pcm->open_wait, &wait); | |
1a60d4c5 | 2396 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2397 | if (err < 0) |
2398 | goto __error; | |
2399 | return err; | |
2400 | ||
2401 | __error: | |
2402 | module_put(pcm->card->module); | |
2403 | __error2: | |
2404 | snd_card_file_remove(pcm->card, file); | |
2405 | __error1: | |
2406 | return err; | |
2407 | } | |
2408 | ||
2409 | static int snd_pcm_release(struct inode *inode, struct file *file) | |
2410 | { | |
877211f5 TI |
2411 | struct snd_pcm *pcm; |
2412 | struct snd_pcm_substream *substream; | |
2413 | struct snd_pcm_file *pcm_file; | |
1da177e4 LT |
2414 | |
2415 | pcm_file = file->private_data; | |
2416 | substream = pcm_file->substream; | |
7eaa943c TI |
2417 | if (snd_BUG_ON(!substream)) |
2418 | return -ENXIO; | |
1da177e4 | 2419 | pcm = substream->pcm; |
1a60d4c5 | 2420 | mutex_lock(&pcm->open_mutex); |
3bf75f9b | 2421 | snd_pcm_release_substream(substream); |
548a648b | 2422 | kfree(pcm_file); |
1a60d4c5 | 2423 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
2424 | wake_up(&pcm->open_wait); |
2425 | module_put(pcm->card->module); | |
2426 | snd_card_file_remove(pcm->card, file); | |
2427 | return 0; | |
2428 | } | |
2429 | ||
877211f5 TI |
2430 | static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, |
2431 | snd_pcm_uframes_t frames) | |
1da177e4 | 2432 | { |
877211f5 | 2433 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2434 | snd_pcm_sframes_t appl_ptr; |
2435 | snd_pcm_sframes_t ret; | |
2436 | snd_pcm_sframes_t hw_avail; | |
2437 | ||
2438 | if (frames == 0) | |
2439 | return 0; | |
2440 | ||
2441 | snd_pcm_stream_lock_irq(substream); | |
2442 | switch (runtime->status->state) { | |
2443 | case SNDRV_PCM_STATE_PREPARED: | |
2444 | break; | |
2445 | case SNDRV_PCM_STATE_DRAINING: | |
2446 | case SNDRV_PCM_STATE_RUNNING: | |
2447 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2448 | break; | |
2449 | /* Fall through */ | |
2450 | case SNDRV_PCM_STATE_XRUN: | |
2451 | ret = -EPIPE; | |
2452 | goto __end; | |
51840409 LR |
2453 | case SNDRV_PCM_STATE_SUSPENDED: |
2454 | ret = -ESTRPIPE; | |
2455 | goto __end; | |
1da177e4 LT |
2456 | default: |
2457 | ret = -EBADFD; | |
2458 | goto __end; | |
2459 | } | |
2460 | ||
2461 | hw_avail = snd_pcm_playback_hw_avail(runtime); | |
2462 | if (hw_avail <= 0) { | |
2463 | ret = 0; | |
2464 | goto __end; | |
2465 | } | |
2466 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2467 | frames = hw_avail; | |
1da177e4 LT |
2468 | appl_ptr = runtime->control->appl_ptr - frames; |
2469 | if (appl_ptr < 0) | |
2470 | appl_ptr += runtime->boundary; | |
2471 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2472 | ret = frames; |
2473 | __end: | |
2474 | snd_pcm_stream_unlock_irq(substream); | |
2475 | return ret; | |
2476 | } | |
2477 | ||
877211f5 TI |
2478 | static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, |
2479 | snd_pcm_uframes_t frames) | |
1da177e4 | 2480 | { |
877211f5 | 2481 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2482 | snd_pcm_sframes_t appl_ptr; |
2483 | snd_pcm_sframes_t ret; | |
2484 | snd_pcm_sframes_t hw_avail; | |
2485 | ||
2486 | if (frames == 0) | |
2487 | return 0; | |
2488 | ||
2489 | snd_pcm_stream_lock_irq(substream); | |
2490 | switch (runtime->status->state) { | |
2491 | case SNDRV_PCM_STATE_PREPARED: | |
2492 | case SNDRV_PCM_STATE_DRAINING: | |
2493 | break; | |
2494 | case SNDRV_PCM_STATE_RUNNING: | |
2495 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2496 | break; | |
2497 | /* Fall through */ | |
2498 | case SNDRV_PCM_STATE_XRUN: | |
2499 | ret = -EPIPE; | |
2500 | goto __end; | |
51840409 LR |
2501 | case SNDRV_PCM_STATE_SUSPENDED: |
2502 | ret = -ESTRPIPE; | |
2503 | goto __end; | |
1da177e4 LT |
2504 | default: |
2505 | ret = -EBADFD; | |
2506 | goto __end; | |
2507 | } | |
2508 | ||
2509 | hw_avail = snd_pcm_capture_hw_avail(runtime); | |
2510 | if (hw_avail <= 0) { | |
2511 | ret = 0; | |
2512 | goto __end; | |
2513 | } | |
2514 | if (frames > (snd_pcm_uframes_t)hw_avail) | |
2515 | frames = hw_avail; | |
1da177e4 LT |
2516 | appl_ptr = runtime->control->appl_ptr - frames; |
2517 | if (appl_ptr < 0) | |
2518 | appl_ptr += runtime->boundary; | |
2519 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2520 | ret = frames; |
2521 | __end: | |
2522 | snd_pcm_stream_unlock_irq(substream); | |
2523 | return ret; | |
2524 | } | |
2525 | ||
877211f5 TI |
2526 | static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, |
2527 | snd_pcm_uframes_t frames) | |
1da177e4 | 2528 | { |
877211f5 | 2529 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2530 | snd_pcm_sframes_t appl_ptr; |
2531 | snd_pcm_sframes_t ret; | |
2532 | snd_pcm_sframes_t avail; | |
2533 | ||
2534 | if (frames == 0) | |
2535 | return 0; | |
2536 | ||
2537 | snd_pcm_stream_lock_irq(substream); | |
2538 | switch (runtime->status->state) { | |
2539 | case SNDRV_PCM_STATE_PREPARED: | |
2540 | case SNDRV_PCM_STATE_PAUSED: | |
2541 | break; | |
2542 | case SNDRV_PCM_STATE_DRAINING: | |
2543 | case SNDRV_PCM_STATE_RUNNING: | |
2544 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2545 | break; | |
2546 | /* Fall through */ | |
2547 | case SNDRV_PCM_STATE_XRUN: | |
2548 | ret = -EPIPE; | |
2549 | goto __end; | |
51840409 LR |
2550 | case SNDRV_PCM_STATE_SUSPENDED: |
2551 | ret = -ESTRPIPE; | |
2552 | goto __end; | |
1da177e4 LT |
2553 | default: |
2554 | ret = -EBADFD; | |
2555 | goto __end; | |
2556 | } | |
2557 | ||
2558 | avail = snd_pcm_playback_avail(runtime); | |
2559 | if (avail <= 0) { | |
2560 | ret = 0; | |
2561 | goto __end; | |
2562 | } | |
2563 | if (frames > (snd_pcm_uframes_t)avail) | |
2564 | frames = avail; | |
1da177e4 LT |
2565 | appl_ptr = runtime->control->appl_ptr + frames; |
2566 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2567 | appl_ptr -= runtime->boundary; | |
2568 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2569 | ret = frames; |
2570 | __end: | |
2571 | snd_pcm_stream_unlock_irq(substream); | |
2572 | return ret; | |
2573 | } | |
2574 | ||
877211f5 TI |
2575 | static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, |
2576 | snd_pcm_uframes_t frames) | |
1da177e4 | 2577 | { |
877211f5 | 2578 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2579 | snd_pcm_sframes_t appl_ptr; |
2580 | snd_pcm_sframes_t ret; | |
2581 | snd_pcm_sframes_t avail; | |
2582 | ||
2583 | if (frames == 0) | |
2584 | return 0; | |
2585 | ||
2586 | snd_pcm_stream_lock_irq(substream); | |
2587 | switch (runtime->status->state) { | |
2588 | case SNDRV_PCM_STATE_PREPARED: | |
2589 | case SNDRV_PCM_STATE_DRAINING: | |
2590 | case SNDRV_PCM_STATE_PAUSED: | |
2591 | break; | |
2592 | case SNDRV_PCM_STATE_RUNNING: | |
2593 | if (snd_pcm_update_hw_ptr(substream) >= 0) | |
2594 | break; | |
2595 | /* Fall through */ | |
2596 | case SNDRV_PCM_STATE_XRUN: | |
2597 | ret = -EPIPE; | |
2598 | goto __end; | |
51840409 LR |
2599 | case SNDRV_PCM_STATE_SUSPENDED: |
2600 | ret = -ESTRPIPE; | |
2601 | goto __end; | |
1da177e4 LT |
2602 | default: |
2603 | ret = -EBADFD; | |
2604 | goto __end; | |
2605 | } | |
2606 | ||
2607 | avail = snd_pcm_capture_avail(runtime); | |
2608 | if (avail <= 0) { | |
2609 | ret = 0; | |
2610 | goto __end; | |
2611 | } | |
2612 | if (frames > (snd_pcm_uframes_t)avail) | |
2613 | frames = avail; | |
1da177e4 LT |
2614 | appl_ptr = runtime->control->appl_ptr + frames; |
2615 | if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) | |
2616 | appl_ptr -= runtime->boundary; | |
2617 | runtime->control->appl_ptr = appl_ptr; | |
1da177e4 LT |
2618 | ret = frames; |
2619 | __end: | |
2620 | snd_pcm_stream_unlock_irq(substream); | |
2621 | return ret; | |
2622 | } | |
2623 | ||
877211f5 | 2624 | static int snd_pcm_hwsync(struct snd_pcm_substream *substream) |
1da177e4 | 2625 | { |
877211f5 | 2626 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2627 | int err; |
2628 | ||
2629 | snd_pcm_stream_lock_irq(substream); | |
2630 | switch (runtime->status->state) { | |
2631 | case SNDRV_PCM_STATE_DRAINING: | |
2632 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2633 | goto __badfd; | |
1f96153b | 2634 | /* Fall through */ |
1da177e4 LT |
2635 | case SNDRV_PCM_STATE_RUNNING: |
2636 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2637 | break; | |
2638 | /* Fall through */ | |
2639 | case SNDRV_PCM_STATE_PREPARED: | |
2640 | case SNDRV_PCM_STATE_SUSPENDED: | |
2641 | err = 0; | |
2642 | break; | |
2643 | case SNDRV_PCM_STATE_XRUN: | |
2644 | err = -EPIPE; | |
2645 | break; | |
2646 | default: | |
2647 | __badfd: | |
2648 | err = -EBADFD; | |
2649 | break; | |
2650 | } | |
2651 | snd_pcm_stream_unlock_irq(substream); | |
2652 | return err; | |
2653 | } | |
2654 | ||
877211f5 TI |
2655 | static int snd_pcm_delay(struct snd_pcm_substream *substream, |
2656 | snd_pcm_sframes_t __user *res) | |
1da177e4 | 2657 | { |
877211f5 | 2658 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2659 | int err; |
2660 | snd_pcm_sframes_t n = 0; | |
2661 | ||
2662 | snd_pcm_stream_lock_irq(substream); | |
2663 | switch (runtime->status->state) { | |
2664 | case SNDRV_PCM_STATE_DRAINING: | |
2665 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
2666 | goto __badfd; | |
1f96153b | 2667 | /* Fall through */ |
1da177e4 LT |
2668 | case SNDRV_PCM_STATE_RUNNING: |
2669 | if ((err = snd_pcm_update_hw_ptr(substream)) < 0) | |
2670 | break; | |
2671 | /* Fall through */ | |
2672 | case SNDRV_PCM_STATE_PREPARED: | |
2673 | case SNDRV_PCM_STATE_SUSPENDED: | |
2674 | err = 0; | |
2675 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2676 | n = snd_pcm_playback_hw_avail(runtime); | |
2677 | else | |
2678 | n = snd_pcm_capture_avail(runtime); | |
4bbe1ddf | 2679 | n += runtime->delay; |
1da177e4 LT |
2680 | break; |
2681 | case SNDRV_PCM_STATE_XRUN: | |
2682 | err = -EPIPE; | |
2683 | break; | |
2684 | default: | |
2685 | __badfd: | |
2686 | err = -EBADFD; | |
2687 | break; | |
2688 | } | |
2689 | snd_pcm_stream_unlock_irq(substream); | |
2690 | if (!err) | |
2691 | if (put_user(n, res)) | |
2692 | err = -EFAULT; | |
2693 | return err; | |
2694 | } | |
2695 | ||
877211f5 TI |
2696 | static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, |
2697 | struct snd_pcm_sync_ptr __user *_sync_ptr) | |
1da177e4 | 2698 | { |
877211f5 TI |
2699 | struct snd_pcm_runtime *runtime = substream->runtime; |
2700 | struct snd_pcm_sync_ptr sync_ptr; | |
2701 | volatile struct snd_pcm_mmap_status *status; | |
2702 | volatile struct snd_pcm_mmap_control *control; | |
1da177e4 LT |
2703 | int err; |
2704 | ||
2705 | memset(&sync_ptr, 0, sizeof(sync_ptr)); | |
2706 | if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) | |
2707 | return -EFAULT; | |
877211f5 | 2708 | if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
2709 | return -EFAULT; |
2710 | status = runtime->status; | |
2711 | control = runtime->control; | |
2712 | if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { | |
2713 | err = snd_pcm_hwsync(substream); | |
2714 | if (err < 0) | |
2715 | return err; | |
2716 | } | |
2717 | snd_pcm_stream_lock_irq(substream); | |
2718 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) | |
2719 | control->appl_ptr = sync_ptr.c.control.appl_ptr; | |
2720 | else | |
2721 | sync_ptr.c.control.appl_ptr = control->appl_ptr; | |
2722 | if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) | |
2723 | control->avail_min = sync_ptr.c.control.avail_min; | |
2724 | else | |
2725 | sync_ptr.c.control.avail_min = control->avail_min; | |
2726 | sync_ptr.s.status.state = status->state; | |
2727 | sync_ptr.s.status.hw_ptr = status->hw_ptr; | |
2728 | sync_ptr.s.status.tstamp = status->tstamp; | |
2729 | sync_ptr.s.status.suspended_state = status->suspended_state; | |
2730 | snd_pcm_stream_unlock_irq(substream); | |
2731 | if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) | |
2732 | return -EFAULT; | |
2733 | return 0; | |
2734 | } | |
b751eef1 JK |
2735 | |
2736 | static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) | |
2737 | { | |
2738 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2739 | int arg; | |
2740 | ||
2741 | if (get_user(arg, _arg)) | |
2742 | return -EFAULT; | |
2743 | if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) | |
2744 | return -EINVAL; | |
2408c219 | 2745 | runtime->tstamp_type = arg; |
b751eef1 JK |
2746 | return 0; |
2747 | } | |
1da177e4 | 2748 | |
0df63e44 TI |
2749 | static int snd_pcm_common_ioctl1(struct file *file, |
2750 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2751 | unsigned int cmd, void __user *arg) |
2752 | { | |
1da177e4 LT |
2753 | switch (cmd) { |
2754 | case SNDRV_PCM_IOCTL_PVERSION: | |
2755 | return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; | |
2756 | case SNDRV_PCM_IOCTL_INFO: | |
2757 | return snd_pcm_info_user(substream, arg); | |
28e9e473 JK |
2758 | case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ |
2759 | return 0; | |
b751eef1 JK |
2760 | case SNDRV_PCM_IOCTL_TTSTAMP: |
2761 | return snd_pcm_tstamp(substream, arg); | |
1da177e4 LT |
2762 | case SNDRV_PCM_IOCTL_HW_REFINE: |
2763 | return snd_pcm_hw_refine_user(substream, arg); | |
2764 | case SNDRV_PCM_IOCTL_HW_PARAMS: | |
2765 | return snd_pcm_hw_params_user(substream, arg); | |
2766 | case SNDRV_PCM_IOCTL_HW_FREE: | |
2767 | return snd_pcm_hw_free(substream); | |
2768 | case SNDRV_PCM_IOCTL_SW_PARAMS: | |
2769 | return snd_pcm_sw_params_user(substream, arg); | |
2770 | case SNDRV_PCM_IOCTL_STATUS: | |
38ca2a4d PLB |
2771 | return snd_pcm_status_user(substream, arg, false); |
2772 | case SNDRV_PCM_IOCTL_STATUS_EXT: | |
2773 | return snd_pcm_status_user(substream, arg, true); | |
1da177e4 LT |
2774 | case SNDRV_PCM_IOCTL_CHANNEL_INFO: |
2775 | return snd_pcm_channel_info_user(substream, arg); | |
2776 | case SNDRV_PCM_IOCTL_PREPARE: | |
0df63e44 | 2777 | return snd_pcm_prepare(substream, file); |
1da177e4 LT |
2778 | case SNDRV_PCM_IOCTL_RESET: |
2779 | return snd_pcm_reset(substream); | |
2780 | case SNDRV_PCM_IOCTL_START: | |
2781 | return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); | |
2782 | case SNDRV_PCM_IOCTL_LINK: | |
2783 | return snd_pcm_link(substream, (int)(unsigned long) arg); | |
2784 | case SNDRV_PCM_IOCTL_UNLINK: | |
2785 | return snd_pcm_unlink(substream); | |
2786 | case SNDRV_PCM_IOCTL_RESUME: | |
2787 | return snd_pcm_resume(substream); | |
2788 | case SNDRV_PCM_IOCTL_XRUN: | |
2789 | return snd_pcm_xrun(substream); | |
2790 | case SNDRV_PCM_IOCTL_HWSYNC: | |
2791 | return snd_pcm_hwsync(substream); | |
2792 | case SNDRV_PCM_IOCTL_DELAY: | |
2793 | return snd_pcm_delay(substream, arg); | |
2794 | case SNDRV_PCM_IOCTL_SYNC_PTR: | |
2795 | return snd_pcm_sync_ptr(substream, arg); | |
59d48582 | 2796 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
2797 | case SNDRV_PCM_IOCTL_HW_REFINE_OLD: |
2798 | return snd_pcm_hw_refine_old_user(substream, arg); | |
2799 | case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: | |
2800 | return snd_pcm_hw_params_old_user(substream, arg); | |
59d48582 | 2801 | #endif |
1da177e4 | 2802 | case SNDRV_PCM_IOCTL_DRAIN: |
4cdc115f | 2803 | return snd_pcm_drain(substream, file); |
1da177e4 LT |
2804 | case SNDRV_PCM_IOCTL_DROP: |
2805 | return snd_pcm_drop(substream); | |
e661d0dd TI |
2806 | case SNDRV_PCM_IOCTL_PAUSE: |
2807 | { | |
2808 | int res; | |
2809 | snd_pcm_stream_lock_irq(substream); | |
2810 | res = snd_pcm_pause(substream, (int)(unsigned long)arg); | |
2811 | snd_pcm_stream_unlock_irq(substream); | |
2812 | return res; | |
2813 | } | |
1da177e4 | 2814 | } |
09e56df8 | 2815 | pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
2816 | return -ENOTTY; |
2817 | } | |
2818 | ||
0df63e44 TI |
2819 | static int snd_pcm_playback_ioctl1(struct file *file, |
2820 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2821 | unsigned int cmd, void __user *arg) |
2822 | { | |
7eaa943c TI |
2823 | if (snd_BUG_ON(!substream)) |
2824 | return -ENXIO; | |
2825 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) | |
2826 | return -EINVAL; | |
1da177e4 LT |
2827 | switch (cmd) { |
2828 | case SNDRV_PCM_IOCTL_WRITEI_FRAMES: | |
2829 | { | |
877211f5 TI |
2830 | struct snd_xferi xferi; |
2831 | struct snd_xferi __user *_xferi = arg; | |
2832 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2833 | snd_pcm_sframes_t result; |
2834 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2835 | return -EBADFD; | |
2836 | if (put_user(0, &_xferi->result)) | |
2837 | return -EFAULT; | |
2838 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2839 | return -EFAULT; | |
2840 | result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); | |
2841 | __put_user(result, &_xferi->result); | |
2842 | return result < 0 ? result : 0; | |
2843 | } | |
2844 | case SNDRV_PCM_IOCTL_WRITEN_FRAMES: | |
2845 | { | |
877211f5 TI |
2846 | struct snd_xfern xfern; |
2847 | struct snd_xfern __user *_xfern = arg; | |
2848 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2849 | void __user **bufs; |
2850 | snd_pcm_sframes_t result; | |
2851 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2852 | return -EBADFD; | |
2853 | if (runtime->channels > 128) | |
2854 | return -EINVAL; | |
2855 | if (put_user(0, &_xfern->result)) | |
2856 | return -EFAULT; | |
2857 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2858 | return -EFAULT; | |
ef44a1ec LZ |
2859 | |
2860 | bufs = memdup_user(xfern.bufs, | |
2861 | sizeof(void *) * runtime->channels); | |
2862 | if (IS_ERR(bufs)) | |
2863 | return PTR_ERR(bufs); | |
1da177e4 LT |
2864 | result = snd_pcm_lib_writev(substream, bufs, xfern.frames); |
2865 | kfree(bufs); | |
2866 | __put_user(result, &_xfern->result); | |
2867 | return result < 0 ? result : 0; | |
2868 | } | |
2869 | case SNDRV_PCM_IOCTL_REWIND: | |
2870 | { | |
2871 | snd_pcm_uframes_t frames; | |
2872 | snd_pcm_uframes_t __user *_frames = arg; | |
2873 | snd_pcm_sframes_t result; | |
2874 | if (get_user(frames, _frames)) | |
2875 | return -EFAULT; | |
2876 | if (put_user(0, _frames)) | |
2877 | return -EFAULT; | |
2878 | result = snd_pcm_playback_rewind(substream, frames); | |
2879 | __put_user(result, _frames); | |
2880 | return result < 0 ? result : 0; | |
2881 | } | |
2882 | case SNDRV_PCM_IOCTL_FORWARD: | |
2883 | { | |
2884 | snd_pcm_uframes_t frames; | |
2885 | snd_pcm_uframes_t __user *_frames = arg; | |
2886 | snd_pcm_sframes_t result; | |
2887 | if (get_user(frames, _frames)) | |
2888 | return -EFAULT; | |
2889 | if (put_user(0, _frames)) | |
2890 | return -EFAULT; | |
2891 | result = snd_pcm_playback_forward(substream, frames); | |
2892 | __put_user(result, _frames); | |
2893 | return result < 0 ? result : 0; | |
2894 | } | |
1da177e4 | 2895 | } |
0df63e44 | 2896 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2897 | } |
2898 | ||
0df63e44 TI |
2899 | static int snd_pcm_capture_ioctl1(struct file *file, |
2900 | struct snd_pcm_substream *substream, | |
1da177e4 LT |
2901 | unsigned int cmd, void __user *arg) |
2902 | { | |
7eaa943c TI |
2903 | if (snd_BUG_ON(!substream)) |
2904 | return -ENXIO; | |
2905 | if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) | |
2906 | return -EINVAL; | |
1da177e4 LT |
2907 | switch (cmd) { |
2908 | case SNDRV_PCM_IOCTL_READI_FRAMES: | |
2909 | { | |
877211f5 TI |
2910 | struct snd_xferi xferi; |
2911 | struct snd_xferi __user *_xferi = arg; | |
2912 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2913 | snd_pcm_sframes_t result; |
2914 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2915 | return -EBADFD; | |
2916 | if (put_user(0, &_xferi->result)) | |
2917 | return -EFAULT; | |
2918 | if (copy_from_user(&xferi, _xferi, sizeof(xferi))) | |
2919 | return -EFAULT; | |
2920 | result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); | |
2921 | __put_user(result, &_xferi->result); | |
2922 | return result < 0 ? result : 0; | |
2923 | } | |
2924 | case SNDRV_PCM_IOCTL_READN_FRAMES: | |
2925 | { | |
877211f5 TI |
2926 | struct snd_xfern xfern; |
2927 | struct snd_xfern __user *_xfern = arg; | |
2928 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
2929 | void *bufs; |
2930 | snd_pcm_sframes_t result; | |
2931 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2932 | return -EBADFD; | |
2933 | if (runtime->channels > 128) | |
2934 | return -EINVAL; | |
2935 | if (put_user(0, &_xfern->result)) | |
2936 | return -EFAULT; | |
2937 | if (copy_from_user(&xfern, _xfern, sizeof(xfern))) | |
2938 | return -EFAULT; | |
ef44a1ec LZ |
2939 | |
2940 | bufs = memdup_user(xfern.bufs, | |
2941 | sizeof(void *) * runtime->channels); | |
2942 | if (IS_ERR(bufs)) | |
2943 | return PTR_ERR(bufs); | |
1da177e4 LT |
2944 | result = snd_pcm_lib_readv(substream, bufs, xfern.frames); |
2945 | kfree(bufs); | |
2946 | __put_user(result, &_xfern->result); | |
2947 | return result < 0 ? result : 0; | |
2948 | } | |
2949 | case SNDRV_PCM_IOCTL_REWIND: | |
2950 | { | |
2951 | snd_pcm_uframes_t frames; | |
2952 | snd_pcm_uframes_t __user *_frames = arg; | |
2953 | snd_pcm_sframes_t result; | |
2954 | if (get_user(frames, _frames)) | |
2955 | return -EFAULT; | |
2956 | if (put_user(0, _frames)) | |
2957 | return -EFAULT; | |
2958 | result = snd_pcm_capture_rewind(substream, frames); | |
2959 | __put_user(result, _frames); | |
2960 | return result < 0 ? result : 0; | |
2961 | } | |
2962 | case SNDRV_PCM_IOCTL_FORWARD: | |
2963 | { | |
2964 | snd_pcm_uframes_t frames; | |
2965 | snd_pcm_uframes_t __user *_frames = arg; | |
2966 | snd_pcm_sframes_t result; | |
2967 | if (get_user(frames, _frames)) | |
2968 | return -EFAULT; | |
2969 | if (put_user(0, _frames)) | |
2970 | return -EFAULT; | |
2971 | result = snd_pcm_capture_forward(substream, frames); | |
2972 | __put_user(result, _frames); | |
2973 | return result < 0 ? result : 0; | |
2974 | } | |
2975 | } | |
0df63e44 | 2976 | return snd_pcm_common_ioctl1(file, substream, cmd, arg); |
1da177e4 LT |
2977 | } |
2978 | ||
877211f5 TI |
2979 | static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, |
2980 | unsigned long arg) | |
1da177e4 | 2981 | { |
877211f5 | 2982 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2983 | |
2984 | pcm_file = file->private_data; | |
2985 | ||
2986 | if (((cmd >> 8) & 0xff) != 'A') | |
2987 | return -ENOTTY; | |
2988 | ||
0df63e44 TI |
2989 | return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, |
2990 | (void __user *)arg); | |
1da177e4 LT |
2991 | } |
2992 | ||
877211f5 TI |
2993 | static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, |
2994 | unsigned long arg) | |
1da177e4 | 2995 | { |
877211f5 | 2996 | struct snd_pcm_file *pcm_file; |
1da177e4 LT |
2997 | |
2998 | pcm_file = file->private_data; | |
2999 | ||
3000 | if (((cmd >> 8) & 0xff) != 'A') | |
3001 | return -ENOTTY; | |
3002 | ||
0df63e44 TI |
3003 | return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, |
3004 | (void __user *)arg); | |
1da177e4 LT |
3005 | } |
3006 | ||
bf1bbb5a TI |
3007 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, |
3008 | unsigned int cmd, void *arg) | |
1da177e4 LT |
3009 | { |
3010 | mm_segment_t fs; | |
3011 | int result; | |
3012 | ||
3013 | fs = snd_enter_user(); | |
1da177e4 LT |
3014 | switch (substream->stream) { |
3015 | case SNDRV_PCM_STREAM_PLAYBACK: | |
0df63e44 TI |
3016 | result = snd_pcm_playback_ioctl1(NULL, substream, cmd, |
3017 | (void __user *)arg); | |
bf1bbb5a | 3018 | break; |
1da177e4 | 3019 | case SNDRV_PCM_STREAM_CAPTURE: |
0df63e44 TI |
3020 | result = snd_pcm_capture_ioctl1(NULL, substream, cmd, |
3021 | (void __user *)arg); | |
bf1bbb5a | 3022 | break; |
1da177e4 | 3023 | default: |
bf1bbb5a TI |
3024 | result = -EINVAL; |
3025 | break; | |
1da177e4 | 3026 | } |
bf1bbb5a TI |
3027 | snd_leave_user(fs); |
3028 | return result; | |
1da177e4 LT |
3029 | } |
3030 | ||
e88e8ae6 TI |
3031 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
3032 | ||
877211f5 TI |
3033 | static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, |
3034 | loff_t * offset) | |
1da177e4 | 3035 | { |
877211f5 TI |
3036 | struct snd_pcm_file *pcm_file; |
3037 | struct snd_pcm_substream *substream; | |
3038 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3039 | snd_pcm_sframes_t result; |
3040 | ||
3041 | pcm_file = file->private_data; | |
3042 | substream = pcm_file->substream; | |
7eaa943c TI |
3043 | if (PCM_RUNTIME_CHECK(substream)) |
3044 | return -ENXIO; | |
1da177e4 LT |
3045 | runtime = substream->runtime; |
3046 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3047 | return -EBADFD; | |
3048 | if (!frame_aligned(runtime, count)) | |
3049 | return -EINVAL; | |
3050 | count = bytes_to_frames(runtime, count); | |
3051 | result = snd_pcm_lib_read(substream, buf, count); | |
3052 | if (result > 0) | |
3053 | result = frames_to_bytes(runtime, result); | |
3054 | return result; | |
3055 | } | |
3056 | ||
877211f5 TI |
3057 | static ssize_t snd_pcm_write(struct file *file, const char __user *buf, |
3058 | size_t count, loff_t * offset) | |
1da177e4 | 3059 | { |
877211f5 TI |
3060 | struct snd_pcm_file *pcm_file; |
3061 | struct snd_pcm_substream *substream; | |
3062 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3063 | snd_pcm_sframes_t result; |
3064 | ||
3065 | pcm_file = file->private_data; | |
3066 | substream = pcm_file->substream; | |
7eaa943c TI |
3067 | if (PCM_RUNTIME_CHECK(substream)) |
3068 | return -ENXIO; | |
1da177e4 | 3069 | runtime = substream->runtime; |
7eaa943c TI |
3070 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3071 | return -EBADFD; | |
3072 | if (!frame_aligned(runtime, count)) | |
3073 | return -EINVAL; | |
1da177e4 LT |
3074 | count = bytes_to_frames(runtime, count); |
3075 | result = snd_pcm_lib_write(substream, buf, count); | |
3076 | if (result > 0) | |
3077 | result = frames_to_bytes(runtime, result); | |
1da177e4 LT |
3078 | return result; |
3079 | } | |
3080 | ||
1c65d986 | 3081 | static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) |
1da177e4 | 3082 | { |
877211f5 TI |
3083 | struct snd_pcm_file *pcm_file; |
3084 | struct snd_pcm_substream *substream; | |
3085 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3086 | snd_pcm_sframes_t result; |
3087 | unsigned long i; | |
3088 | void __user **bufs; | |
3089 | snd_pcm_uframes_t frames; | |
3090 | ||
ee0b3e67 | 3091 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3092 | substream = pcm_file->substream; |
7eaa943c TI |
3093 | if (PCM_RUNTIME_CHECK(substream)) |
3094 | return -ENXIO; | |
1da177e4 LT |
3095 | runtime = substream->runtime; |
3096 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
3097 | return -EBADFD; | |
1c65d986 AV |
3098 | if (!iter_is_iovec(to)) |
3099 | return -EINVAL; | |
3100 | if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) | |
1da177e4 | 3101 | return -EINVAL; |
1c65d986 | 3102 | if (!frame_aligned(runtime, to->iov->iov_len)) |
1da177e4 | 3103 | return -EINVAL; |
1c65d986 AV |
3104 | frames = bytes_to_samples(runtime, to->iov->iov_len); |
3105 | bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3106 | if (bufs == NULL) |
3107 | return -ENOMEM; | |
1c65d986 AV |
3108 | for (i = 0; i < to->nr_segs; ++i) |
3109 | bufs[i] = to->iov[i].iov_base; | |
1da177e4 LT |
3110 | result = snd_pcm_lib_readv(substream, bufs, frames); |
3111 | if (result > 0) | |
3112 | result = frames_to_bytes(runtime, result); | |
3113 | kfree(bufs); | |
3114 | return result; | |
3115 | } | |
3116 | ||
1c65d986 | 3117 | static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 3118 | { |
877211f5 TI |
3119 | struct snd_pcm_file *pcm_file; |
3120 | struct snd_pcm_substream *substream; | |
3121 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3122 | snd_pcm_sframes_t result; |
3123 | unsigned long i; | |
3124 | void __user **bufs; | |
3125 | snd_pcm_uframes_t frames; | |
3126 | ||
ee0b3e67 | 3127 | pcm_file = iocb->ki_filp->private_data; |
1da177e4 | 3128 | substream = pcm_file->substream; |
7eaa943c TI |
3129 | if (PCM_RUNTIME_CHECK(substream)) |
3130 | return -ENXIO; | |
1da177e4 | 3131 | runtime = substream->runtime; |
7eaa943c TI |
3132 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3133 | return -EBADFD; | |
1c65d986 AV |
3134 | if (!iter_is_iovec(from)) |
3135 | return -EINVAL; | |
3136 | if (from->nr_segs > 128 || from->nr_segs != runtime->channels || | |
3137 | !frame_aligned(runtime, from->iov->iov_len)) | |
7eaa943c | 3138 | return -EINVAL; |
1c65d986 AV |
3139 | frames = bytes_to_samples(runtime, from->iov->iov_len); |
3140 | bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); | |
1da177e4 LT |
3141 | if (bufs == NULL) |
3142 | return -ENOMEM; | |
1c65d986 AV |
3143 | for (i = 0; i < from->nr_segs; ++i) |
3144 | bufs[i] = from->iov[i].iov_base; | |
1da177e4 LT |
3145 | result = snd_pcm_lib_writev(substream, bufs, frames); |
3146 | if (result > 0) | |
3147 | result = frames_to_bytes(runtime, result); | |
3148 | kfree(bufs); | |
1da177e4 LT |
3149 | return result; |
3150 | } | |
3151 | ||
3152 | static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) | |
3153 | { | |
877211f5 TI |
3154 | struct snd_pcm_file *pcm_file; |
3155 | struct snd_pcm_substream *substream; | |
3156 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3157 | unsigned int mask; |
3158 | snd_pcm_uframes_t avail; | |
3159 | ||
3160 | pcm_file = file->private_data; | |
3161 | ||
3162 | substream = pcm_file->substream; | |
7eaa943c | 3163 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3164 | return POLLOUT | POLLWRNORM | POLLERR; |
1da177e4 LT |
3165 | runtime = substream->runtime; |
3166 | ||
3167 | poll_wait(file, &runtime->sleep, wait); | |
3168 | ||
3169 | snd_pcm_stream_lock_irq(substream); | |
3170 | avail = snd_pcm_playback_avail(runtime); | |
3171 | switch (runtime->status->state) { | |
3172 | case SNDRV_PCM_STATE_RUNNING: | |
3173 | case SNDRV_PCM_STATE_PREPARED: | |
3174 | case SNDRV_PCM_STATE_PAUSED: | |
3175 | if (avail >= runtime->control->avail_min) { | |
3176 | mask = POLLOUT | POLLWRNORM; | |
3177 | break; | |
3178 | } | |
3179 | /* Fall through */ | |
3180 | case SNDRV_PCM_STATE_DRAINING: | |
3181 | mask = 0; | |
3182 | break; | |
3183 | default: | |
3184 | mask = POLLOUT | POLLWRNORM | POLLERR; | |
3185 | break; | |
3186 | } | |
3187 | snd_pcm_stream_unlock_irq(substream); | |
3188 | return mask; | |
3189 | } | |
3190 | ||
3191 | static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) | |
3192 | { | |
877211f5 TI |
3193 | struct snd_pcm_file *pcm_file; |
3194 | struct snd_pcm_substream *substream; | |
3195 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3196 | unsigned int mask; |
3197 | snd_pcm_uframes_t avail; | |
3198 | ||
3199 | pcm_file = file->private_data; | |
3200 | ||
3201 | substream = pcm_file->substream; | |
7eaa943c | 3202 | if (PCM_RUNTIME_CHECK(substream)) |
e099aeea | 3203 | return POLLIN | POLLRDNORM | POLLERR; |
1da177e4 LT |
3204 | runtime = substream->runtime; |
3205 | ||
3206 | poll_wait(file, &runtime->sleep, wait); | |
3207 | ||
3208 | snd_pcm_stream_lock_irq(substream); | |
3209 | avail = snd_pcm_capture_avail(runtime); | |
3210 | switch (runtime->status->state) { | |
3211 | case SNDRV_PCM_STATE_RUNNING: | |
3212 | case SNDRV_PCM_STATE_PREPARED: | |
3213 | case SNDRV_PCM_STATE_PAUSED: | |
3214 | if (avail >= runtime->control->avail_min) { | |
3215 | mask = POLLIN | POLLRDNORM; | |
3216 | break; | |
3217 | } | |
3218 | mask = 0; | |
3219 | break; | |
3220 | case SNDRV_PCM_STATE_DRAINING: | |
3221 | if (avail > 0) { | |
3222 | mask = POLLIN | POLLRDNORM; | |
3223 | break; | |
3224 | } | |
3225 | /* Fall through */ | |
3226 | default: | |
3227 | mask = POLLIN | POLLRDNORM | POLLERR; | |
3228 | break; | |
3229 | } | |
3230 | snd_pcm_stream_unlock_irq(substream); | |
3231 | return mask; | |
3232 | } | |
3233 | ||
3234 | /* | |
3235 | * mmap support | |
3236 | */ | |
3237 | ||
3238 | /* | |
3239 | * Only on coherent architectures, we can mmap the status and the control records | |
3240 | * for effcient data transfer. On others, we have to use HWSYNC ioctl... | |
3241 | */ | |
3242 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) | |
3243 | /* | |
3244 | * mmap status record | |
3245 | */ | |
3ad5afcd NP |
3246 | static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, |
3247 | struct vm_fault *vmf) | |
1da177e4 | 3248 | { |
877211f5 TI |
3249 | struct snd_pcm_substream *substream = area->vm_private_data; |
3250 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3251 | |
3252 | if (substream == NULL) | |
3ad5afcd | 3253 | return VM_FAULT_SIGBUS; |
1da177e4 | 3254 | runtime = substream->runtime; |
3ad5afcd NP |
3255 | vmf->page = virt_to_page(runtime->status); |
3256 | get_page(vmf->page); | |
3257 | return 0; | |
1da177e4 LT |
3258 | } |
3259 | ||
f0f37e2f | 3260 | static const struct vm_operations_struct snd_pcm_vm_ops_status = |
1da177e4 | 3261 | { |
3ad5afcd | 3262 | .fault = snd_pcm_mmap_status_fault, |
1da177e4 LT |
3263 | }; |
3264 | ||
877211f5 | 3265 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3266 | struct vm_area_struct *area) |
3267 | { | |
1da177e4 LT |
3268 | long size; |
3269 | if (!(area->vm_flags & VM_READ)) | |
3270 | return -EINVAL; | |
1da177e4 | 3271 | size = area->vm_end - area->vm_start; |
877211f5 | 3272 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) |
1da177e4 LT |
3273 | return -EINVAL; |
3274 | area->vm_ops = &snd_pcm_vm_ops_status; | |
3275 | area->vm_private_data = substream; | |
314e51b9 | 3276 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3277 | return 0; |
3278 | } | |
3279 | ||
3280 | /* | |
3281 | * mmap control record | |
3282 | */ | |
3ad5afcd NP |
3283 | static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, |
3284 | struct vm_fault *vmf) | |
1da177e4 | 3285 | { |
877211f5 TI |
3286 | struct snd_pcm_substream *substream = area->vm_private_data; |
3287 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3288 | |
3289 | if (substream == NULL) | |
3ad5afcd | 3290 | return VM_FAULT_SIGBUS; |
1da177e4 | 3291 | runtime = substream->runtime; |
3ad5afcd NP |
3292 | vmf->page = virt_to_page(runtime->control); |
3293 | get_page(vmf->page); | |
3294 | return 0; | |
1da177e4 LT |
3295 | } |
3296 | ||
f0f37e2f | 3297 | static const struct vm_operations_struct snd_pcm_vm_ops_control = |
1da177e4 | 3298 | { |
3ad5afcd | 3299 | .fault = snd_pcm_mmap_control_fault, |
1da177e4 LT |
3300 | }; |
3301 | ||
877211f5 | 3302 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3303 | struct vm_area_struct *area) |
3304 | { | |
1da177e4 LT |
3305 | long size; |
3306 | if (!(area->vm_flags & VM_READ)) | |
3307 | return -EINVAL; | |
1da177e4 | 3308 | size = area->vm_end - area->vm_start; |
877211f5 | 3309 | if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) |
1da177e4 LT |
3310 | return -EINVAL; |
3311 | area->vm_ops = &snd_pcm_vm_ops_control; | |
3312 | area->vm_private_data = substream; | |
314e51b9 | 3313 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
1da177e4 LT |
3314 | return 0; |
3315 | } | |
3316 | #else /* ! coherent mmap */ | |
3317 | /* | |
3318 | * don't support mmap for status and control records. | |
3319 | */ | |
877211f5 | 3320 | static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3321 | struct vm_area_struct *area) |
3322 | { | |
3323 | return -ENXIO; | |
3324 | } | |
877211f5 | 3325 | static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3326 | struct vm_area_struct *area) |
3327 | { | |
3328 | return -ENXIO; | |
3329 | } | |
3330 | #endif /* coherent mmap */ | |
3331 | ||
9eb4a067 TI |
3332 | static inline struct page * |
3333 | snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) | |
3334 | { | |
3335 | void *vaddr = substream->runtime->dma_area + ofs; | |
3336 | return virt_to_page(vaddr); | |
3337 | } | |
3338 | ||
1da177e4 | 3339 | /* |
3ad5afcd | 3340 | * fault callback for mmapping a RAM page |
1da177e4 | 3341 | */ |
3ad5afcd NP |
3342 | static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, |
3343 | struct vm_fault *vmf) | |
1da177e4 | 3344 | { |
877211f5 TI |
3345 | struct snd_pcm_substream *substream = area->vm_private_data; |
3346 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3347 | unsigned long offset; |
3348 | struct page * page; | |
1da177e4 LT |
3349 | size_t dma_bytes; |
3350 | ||
3351 | if (substream == NULL) | |
3ad5afcd | 3352 | return VM_FAULT_SIGBUS; |
1da177e4 | 3353 | runtime = substream->runtime; |
3ad5afcd | 3354 | offset = vmf->pgoff << PAGE_SHIFT; |
1da177e4 LT |
3355 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); |
3356 | if (offset > dma_bytes - PAGE_SIZE) | |
3ad5afcd | 3357 | return VM_FAULT_SIGBUS; |
9eb4a067 | 3358 | if (substream->ops->page) |
1da177e4 | 3359 | page = substream->ops->page(substream, offset); |
9eb4a067 TI |
3360 | else |
3361 | page = snd_pcm_default_page_ops(substream, offset); | |
3362 | if (!page) | |
3363 | return VM_FAULT_SIGBUS; | |
b5810039 | 3364 | get_page(page); |
3ad5afcd NP |
3365 | vmf->page = page; |
3366 | return 0; | |
1da177e4 LT |
3367 | } |
3368 | ||
657b1989 TI |
3369 | static const struct vm_operations_struct snd_pcm_vm_ops_data = { |
3370 | .open = snd_pcm_mmap_data_open, | |
3371 | .close = snd_pcm_mmap_data_close, | |
3372 | }; | |
3373 | ||
3374 | static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { | |
1da177e4 LT |
3375 | .open = snd_pcm_mmap_data_open, |
3376 | .close = snd_pcm_mmap_data_close, | |
3ad5afcd | 3377 | .fault = snd_pcm_mmap_data_fault, |
1da177e4 LT |
3378 | }; |
3379 | ||
3380 | /* | |
3381 | * mmap the DMA buffer on RAM | |
3382 | */ | |
30b771cf TI |
3383 | |
3384 | /** | |
3385 | * snd_pcm_lib_default_mmap - Default PCM data mmap function | |
3386 | * @substream: PCM substream | |
3387 | * @area: VMA | |
3388 | * | |
3389 | * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, | |
3390 | * this function is invoked implicitly. | |
3391 | */ | |
18a2b962 TI |
3392 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
3393 | struct vm_area_struct *area) | |
1da177e4 | 3394 | { |
314e51b9 | 3395 | area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
a5606f85 | 3396 | #ifdef CONFIG_GENERIC_ALLOCATOR |
05503214 NC |
3397 | if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { |
3398 | area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); | |
3399 | return remap_pfn_range(area, area->vm_start, | |
3400 | substream->dma_buffer.addr >> PAGE_SHIFT, | |
3401 | area->vm_end - area->vm_start, area->vm_page_prot); | |
3402 | } | |
a5606f85 | 3403 | #endif /* CONFIG_GENERIC_ALLOCATOR */ |
49d776ff | 3404 | #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ |
657b1989 TI |
3405 | if (!substream->ops->page && |
3406 | substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) | |
3407 | return dma_mmap_coherent(substream->dma_buffer.dev.dev, | |
3408 | area, | |
3409 | substream->runtime->dma_area, | |
3410 | substream->runtime->dma_addr, | |
3411 | area->vm_end - area->vm_start); | |
49d776ff | 3412 | #endif /* CONFIG_X86 */ |
657b1989 TI |
3413 | /* mmap with fault handler */ |
3414 | area->vm_ops = &snd_pcm_vm_ops_data_fault; | |
1da177e4 LT |
3415 | return 0; |
3416 | } | |
18a2b962 | 3417 | EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); |
1da177e4 LT |
3418 | |
3419 | /* | |
3420 | * mmap the DMA buffer on I/O memory area | |
3421 | */ | |
3422 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
30b771cf TI |
3423 | /** |
3424 | * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem | |
3425 | * @substream: PCM substream | |
3426 | * @area: VMA | |
3427 | * | |
3428 | * When your hardware uses the iomapped pages as the hardware buffer and | |
3429 | * wants to mmap it, pass this function as mmap pcm_ops. Note that this | |
3430 | * is supposed to work only on limited architectures. | |
3431 | */ | |
877211f5 TI |
3432 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, |
3433 | struct vm_area_struct *area) | |
1da177e4 | 3434 | { |
0fe09a45 | 3435 | struct snd_pcm_runtime *runtime = substream->runtime;; |
1da177e4 | 3436 | |
1da177e4 | 3437 | area->vm_page_prot = pgprot_noncached(area->vm_page_prot); |
0fe09a45 | 3438 | return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); |
1da177e4 | 3439 | } |
e88e8ae6 TI |
3440 | |
3441 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1da177e4 LT |
3442 | #endif /* SNDRV_PCM_INFO_MMAP */ |
3443 | ||
3444 | /* | |
3445 | * mmap DMA buffer | |
3446 | */ | |
877211f5 | 3447 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, |
1da177e4 LT |
3448 | struct vm_area_struct *area) |
3449 | { | |
877211f5 | 3450 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
3451 | long size; |
3452 | unsigned long offset; | |
3453 | size_t dma_bytes; | |
657b1989 | 3454 | int err; |
1da177e4 LT |
3455 | |
3456 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
3457 | if (!(area->vm_flags & (VM_WRITE|VM_READ))) | |
3458 | return -EINVAL; | |
3459 | } else { | |
3460 | if (!(area->vm_flags & VM_READ)) | |
3461 | return -EINVAL; | |
3462 | } | |
3463 | runtime = substream->runtime; | |
1da177e4 LT |
3464 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
3465 | return -EBADFD; | |
3466 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) | |
3467 | return -ENXIO; | |
3468 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
3469 | runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
3470 | return -EINVAL; | |
3471 | size = area->vm_end - area->vm_start; | |
3472 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3473 | dma_bytes = PAGE_ALIGN(runtime->dma_bytes); | |
3474 | if ((size_t)size > dma_bytes) | |
3475 | return -EINVAL; | |
3476 | if (offset > dma_bytes - size) | |
3477 | return -EINVAL; | |
3478 | ||
657b1989 TI |
3479 | area->vm_ops = &snd_pcm_vm_ops_data; |
3480 | area->vm_private_data = substream; | |
1da177e4 | 3481 | if (substream->ops->mmap) |
657b1989 | 3482 | err = substream->ops->mmap(substream, area); |
1da177e4 | 3483 | else |
18a2b962 | 3484 | err = snd_pcm_lib_default_mmap(substream, area); |
657b1989 TI |
3485 | if (!err) |
3486 | atomic_inc(&substream->mmap_count); | |
3487 | return err; | |
1da177e4 LT |
3488 | } |
3489 | ||
e88e8ae6 TI |
3490 | EXPORT_SYMBOL(snd_pcm_mmap_data); |
3491 | ||
1da177e4 LT |
3492 | static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) |
3493 | { | |
877211f5 TI |
3494 | struct snd_pcm_file * pcm_file; |
3495 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
3496 | unsigned long offset; |
3497 | ||
3498 | pcm_file = file->private_data; | |
3499 | substream = pcm_file->substream; | |
7eaa943c TI |
3500 | if (PCM_RUNTIME_CHECK(substream)) |
3501 | return -ENXIO; | |
1da177e4 LT |
3502 | |
3503 | offset = area->vm_pgoff << PAGE_SHIFT; | |
3504 | switch (offset) { | |
3505 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
548a648b | 3506 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3507 | return -ENXIO; |
3508 | return snd_pcm_mmap_status(substream, file, area); | |
3509 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
548a648b | 3510 | if (pcm_file->no_compat_mmap) |
1da177e4 LT |
3511 | return -ENXIO; |
3512 | return snd_pcm_mmap_control(substream, file, area); | |
3513 | default: | |
3514 | return snd_pcm_mmap_data(substream, file, area); | |
3515 | } | |
3516 | return 0; | |
3517 | } | |
3518 | ||
3519 | static int snd_pcm_fasync(int fd, struct file * file, int on) | |
3520 | { | |
877211f5 TI |
3521 | struct snd_pcm_file * pcm_file; |
3522 | struct snd_pcm_substream *substream; | |
3523 | struct snd_pcm_runtime *runtime; | |
1da177e4 LT |
3524 | |
3525 | pcm_file = file->private_data; | |
3526 | substream = pcm_file->substream; | |
7eaa943c | 3527 | if (PCM_RUNTIME_CHECK(substream)) |
d05468b7 | 3528 | return -ENXIO; |
1da177e4 | 3529 | runtime = substream->runtime; |
d05468b7 | 3530 | return fasync_helper(fd, file, on, &runtime->fasync); |
1da177e4 LT |
3531 | } |
3532 | ||
3533 | /* | |
3534 | * ioctl32 compat | |
3535 | */ | |
3536 | #ifdef CONFIG_COMPAT | |
3537 | #include "pcm_compat.c" | |
3538 | #else | |
3539 | #define snd_pcm_ioctl_compat NULL | |
3540 | #endif | |
3541 | ||
3542 | /* | |
3543 | * To be removed helpers to keep binary compatibility | |
3544 | */ | |
3545 | ||
59d48582 | 3546 | #ifdef CONFIG_SND_SUPPORT_OLD_API |
1da177e4 LT |
3547 | #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) |
3548 | #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) | |
3549 | ||
877211f5 TI |
3550 | static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, |
3551 | struct snd_pcm_hw_params_old *oparams) | |
1da177e4 LT |
3552 | { |
3553 | unsigned int i; | |
3554 | ||
3555 | memset(params, 0, sizeof(*params)); | |
3556 | params->flags = oparams->flags; | |
3557 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3558 | params->masks[i].bits[0] = oparams->masks[i]; | |
3559 | memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); | |
3560 | params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); | |
3561 | params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); | |
3562 | params->info = oparams->info; | |
3563 | params->msbits = oparams->msbits; | |
3564 | params->rate_num = oparams->rate_num; | |
3565 | params->rate_den = oparams->rate_den; | |
3566 | params->fifo_size = oparams->fifo_size; | |
3567 | } | |
3568 | ||
877211f5 TI |
3569 | static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, |
3570 | struct snd_pcm_hw_params *params) | |
1da177e4 LT |
3571 | { |
3572 | unsigned int i; | |
3573 | ||
3574 | memset(oparams, 0, sizeof(*oparams)); | |
3575 | oparams->flags = params->flags; | |
3576 | for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) | |
3577 | oparams->masks[i] = params->masks[i].bits[0]; | |
3578 | memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); | |
3579 | oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); | |
3580 | oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); | |
3581 | oparams->info = params->info; | |
3582 | oparams->msbits = params->msbits; | |
3583 | oparams->rate_num = params->rate_num; | |
3584 | oparams->rate_den = params->rate_den; | |
3585 | oparams->fifo_size = params->fifo_size; | |
3586 | } | |
3587 | ||
877211f5 TI |
3588 | static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, |
3589 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3590 | { |
877211f5 TI |
3591 | struct snd_pcm_hw_params *params; |
3592 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3593 | int err; |
3594 | ||
3595 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3596 | if (!params) |
3597 | return -ENOMEM; | |
1da177e4 | 3598 | |
ef44a1ec LZ |
3599 | oparams = memdup_user(_oparams, sizeof(*oparams)); |
3600 | if (IS_ERR(oparams)) { | |
3601 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3602 | goto out; |
3603 | } | |
3604 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3605 | err = snd_pcm_hw_refine(substream, params); | |
3606 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3607 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3608 | if (!err) | |
3609 | err = -EFAULT; | |
3610 | } | |
ef44a1ec LZ |
3611 | |
3612 | kfree(oparams); | |
1da177e4 LT |
3613 | out: |
3614 | kfree(params); | |
1da177e4 LT |
3615 | return err; |
3616 | } | |
3617 | ||
877211f5 TI |
3618 | static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, |
3619 | struct snd_pcm_hw_params_old __user * _oparams) | |
1da177e4 | 3620 | { |
877211f5 TI |
3621 | struct snd_pcm_hw_params *params; |
3622 | struct snd_pcm_hw_params_old *oparams = NULL; | |
1da177e4 LT |
3623 | int err; |
3624 | ||
3625 | params = kmalloc(sizeof(*params), GFP_KERNEL); | |
ef44a1ec LZ |
3626 | if (!params) |
3627 | return -ENOMEM; | |
3628 | ||
3629 | oparams = memdup_user(_oparams, sizeof(*oparams)); | |
3630 | if (IS_ERR(oparams)) { | |
3631 | err = PTR_ERR(oparams); | |
1da177e4 LT |
3632 | goto out; |
3633 | } | |
3634 | snd_pcm_hw_convert_from_old_params(params, oparams); | |
3635 | err = snd_pcm_hw_params(substream, params); | |
3636 | snd_pcm_hw_convert_to_old_params(oparams, params); | |
3637 | if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { | |
3638 | if (!err) | |
3639 | err = -EFAULT; | |
3640 | } | |
ef44a1ec LZ |
3641 | |
3642 | kfree(oparams); | |
1da177e4 LT |
3643 | out: |
3644 | kfree(params); | |
1da177e4 LT |
3645 | return err; |
3646 | } | |
59d48582 | 3647 | #endif /* CONFIG_SND_SUPPORT_OLD_API */ |
1da177e4 | 3648 | |
7003609b | 3649 | #ifndef CONFIG_MMU |
55c63bd2 DG |
3650 | static unsigned long snd_pcm_get_unmapped_area(struct file *file, |
3651 | unsigned long addr, | |
3652 | unsigned long len, | |
3653 | unsigned long pgoff, | |
3654 | unsigned long flags) | |
3655 | { | |
3656 | struct snd_pcm_file *pcm_file = file->private_data; | |
3657 | struct snd_pcm_substream *substream = pcm_file->substream; | |
3658 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3659 | unsigned long offset = pgoff << PAGE_SHIFT; | |
3660 | ||
3661 | switch (offset) { | |
3662 | case SNDRV_PCM_MMAP_OFFSET_STATUS: | |
3663 | return (unsigned long)runtime->status; | |
3664 | case SNDRV_PCM_MMAP_OFFSET_CONTROL: | |
3665 | return (unsigned long)runtime->control; | |
3666 | default: | |
3667 | return (unsigned long)runtime->dma_area + offset; | |
3668 | } | |
7003609b CC |
3669 | } |
3670 | #else | |
55c63bd2 | 3671 | # define snd_pcm_get_unmapped_area NULL |
7003609b CC |
3672 | #endif |
3673 | ||
1da177e4 LT |
3674 | /* |
3675 | * Register section | |
3676 | */ | |
3677 | ||
9c2e08c5 | 3678 | const struct file_operations snd_pcm_f_ops[2] = { |
1da177e4 | 3679 | { |
2af677fc CL |
3680 | .owner = THIS_MODULE, |
3681 | .write = snd_pcm_write, | |
1c65d986 | 3682 | .write_iter = snd_pcm_writev, |
f87135f5 | 3683 | .open = snd_pcm_playback_open, |
2af677fc | 3684 | .release = snd_pcm_release, |
02f4865f | 3685 | .llseek = no_llseek, |
2af677fc CL |
3686 | .poll = snd_pcm_playback_poll, |
3687 | .unlocked_ioctl = snd_pcm_playback_ioctl, | |
3688 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3689 | .mmap = snd_pcm_mmap, | |
3690 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3691 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3692 | }, |
3693 | { | |
2af677fc CL |
3694 | .owner = THIS_MODULE, |
3695 | .read = snd_pcm_read, | |
1c65d986 | 3696 | .read_iter = snd_pcm_readv, |
f87135f5 | 3697 | .open = snd_pcm_capture_open, |
2af677fc | 3698 | .release = snd_pcm_release, |
02f4865f | 3699 | .llseek = no_llseek, |
2af677fc CL |
3700 | .poll = snd_pcm_capture_poll, |
3701 | .unlocked_ioctl = snd_pcm_capture_ioctl, | |
3702 | .compat_ioctl = snd_pcm_ioctl_compat, | |
3703 | .mmap = snd_pcm_mmap, | |
3704 | .fasync = snd_pcm_fasync, | |
55c63bd2 | 3705 | .get_unmapped_area = snd_pcm_get_unmapped_area, |
1da177e4 LT |
3706 | } |
3707 | }; |