1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 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 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/time.h> 26 #include <linux/latency.h> 27 #include <linux/uio.h> 28 #include <sound/core.h> 29 #include <sound/control.h> 30 #include <sound/info.h> 31 #include <sound/pcm.h> 32 #include <sound/pcm_params.h> 33 #include <sound/timer.h> 34 #include <sound/minors.h> 35 #include <asm/io.h> 36 37 /* 38 * Compatibility 39 */ 40 41 struct snd_pcm_hw_params_old { 42 unsigned int flags; 43 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 44 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 45 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 46 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 47 unsigned int rmask; 48 unsigned int cmask; 49 unsigned int info; 50 unsigned int msbits; 51 unsigned int rate_num; 52 unsigned int rate_den; 53 snd_pcm_uframes_t fifo_size; 54 unsigned char reserved[64]; 55 }; 56 57 #ifdef CONFIG_SND_SUPPORT_OLD_API 58 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 59 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 60 61 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 62 struct snd_pcm_hw_params_old __user * _oparams); 63 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 64 struct snd_pcm_hw_params_old __user * _oparams); 65 #endif 66 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 67 68 /* 69 * 70 */ 71 72 DEFINE_RWLOCK(snd_pcm_link_rwlock); 73 EXPORT_SYMBOL(snd_pcm_link_rwlock); 74 75 static DECLARE_RWSEM(snd_pcm_link_rwsem); 76 77 static inline mm_segment_t snd_enter_user(void) 78 { 79 mm_segment_t fs = get_fs(); 80 set_fs(get_ds()); 81 return fs; 82 } 83 84 static inline void snd_leave_user(mm_segment_t fs) 85 { 86 set_fs(fs); 87 } 88 89 90 91 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 92 { 93 struct snd_pcm_runtime *runtime; 94 struct snd_pcm *pcm = substream->pcm; 95 struct snd_pcm_str *pstr = substream->pstr; 96 97 snd_assert(substream != NULL, return -ENXIO); 98 memset(info, 0, sizeof(*info)); 99 info->card = pcm->card->number; 100 info->device = pcm->device; 101 info->stream = substream->stream; 102 info->subdevice = substream->number; 103 strlcpy(info->id, pcm->id, sizeof(info->id)); 104 strlcpy(info->name, pcm->name, sizeof(info->name)); 105 info->dev_class = pcm->dev_class; 106 info->dev_subclass = pcm->dev_subclass; 107 info->subdevices_count = pstr->substream_count; 108 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 109 strlcpy(info->subname, substream->name, sizeof(info->subname)); 110 runtime = substream->runtime; 111 /* AB: FIXME!!! This is definitely nonsense */ 112 if (runtime) { 113 info->sync = runtime->sync; 114 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 115 } 116 return 0; 117 } 118 119 int snd_pcm_info_user(struct snd_pcm_substream *substream, 120 struct snd_pcm_info __user * _info) 121 { 122 struct snd_pcm_info *info; 123 int err; 124 125 info = kmalloc(sizeof(*info), GFP_KERNEL); 126 if (! info) 127 return -ENOMEM; 128 err = snd_pcm_info(substream, info); 129 if (err >= 0) { 130 if (copy_to_user(_info, info, sizeof(*info))) 131 err = -EFAULT; 132 } 133 kfree(info); 134 return err; 135 } 136 137 #undef RULES_DEBUG 138 139 #ifdef RULES_DEBUG 140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 141 char *snd_pcm_hw_param_names[] = { 142 HW_PARAM(ACCESS), 143 HW_PARAM(FORMAT), 144 HW_PARAM(SUBFORMAT), 145 HW_PARAM(SAMPLE_BITS), 146 HW_PARAM(FRAME_BITS), 147 HW_PARAM(CHANNELS), 148 HW_PARAM(RATE), 149 HW_PARAM(PERIOD_TIME), 150 HW_PARAM(PERIOD_SIZE), 151 HW_PARAM(PERIOD_BYTES), 152 HW_PARAM(PERIODS), 153 HW_PARAM(BUFFER_TIME), 154 HW_PARAM(BUFFER_SIZE), 155 HW_PARAM(BUFFER_BYTES), 156 HW_PARAM(TICK_TIME), 157 }; 158 #endif 159 160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 161 struct snd_pcm_hw_params *params) 162 { 163 unsigned int k; 164 struct snd_pcm_hardware *hw; 165 struct snd_interval *i = NULL; 166 struct snd_mask *m = NULL; 167 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 168 unsigned int rstamps[constrs->rules_num]; 169 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 170 unsigned int stamp = 2; 171 int changed, again; 172 173 params->info = 0; 174 params->fifo_size = 0; 175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 176 params->msbits = 0; 177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 178 params->rate_num = 0; 179 params->rate_den = 0; 180 } 181 182 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 183 m = hw_param_mask(params, k); 184 if (snd_mask_empty(m)) 185 return -EINVAL; 186 if (!(params->rmask & (1 << k))) 187 continue; 188 #ifdef RULES_DEBUG 189 printk("%s = ", snd_pcm_hw_param_names[k]); 190 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 191 #endif 192 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 193 #ifdef RULES_DEBUG 194 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 195 #endif 196 if (changed) 197 params->cmask |= 1 << k; 198 if (changed < 0) 199 return changed; 200 } 201 202 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 203 i = hw_param_interval(params, k); 204 if (snd_interval_empty(i)) 205 return -EINVAL; 206 if (!(params->rmask & (1 << k))) 207 continue; 208 #ifdef RULES_DEBUG 209 printk("%s = ", snd_pcm_hw_param_names[k]); 210 if (i->empty) 211 printk("empty"); 212 else 213 printk("%c%u %u%c", 214 i->openmin ? '(' : '[', i->min, 215 i->max, i->openmax ? ')' : ']'); 216 printk(" -> "); 217 #endif 218 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 219 #ifdef RULES_DEBUG 220 if (i->empty) 221 printk("empty\n"); 222 else 223 printk("%c%u %u%c\n", 224 i->openmin ? '(' : '[', i->min, 225 i->max, i->openmax ? ')' : ']'); 226 #endif 227 if (changed) 228 params->cmask |= 1 << k; 229 if (changed < 0) 230 return changed; 231 } 232 233 for (k = 0; k < constrs->rules_num; k++) 234 rstamps[k] = 0; 235 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 236 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 237 do { 238 again = 0; 239 for (k = 0; k < constrs->rules_num; k++) { 240 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 241 unsigned int d; 242 int doit = 0; 243 if (r->cond && !(r->cond & params->flags)) 244 continue; 245 for (d = 0; r->deps[d] >= 0; d++) { 246 if (vstamps[r->deps[d]] > rstamps[k]) { 247 doit = 1; 248 break; 249 } 250 } 251 if (!doit) 252 continue; 253 #ifdef RULES_DEBUG 254 printk("Rule %d [%p]: ", k, r->func); 255 if (r->var >= 0) { 256 printk("%s = ", snd_pcm_hw_param_names[r->var]); 257 if (hw_is_mask(r->var)) { 258 m = hw_param_mask(params, r->var); 259 printk("%x", *m->bits); 260 } else { 261 i = hw_param_interval(params, r->var); 262 if (i->empty) 263 printk("empty"); 264 else 265 printk("%c%u %u%c", 266 i->openmin ? '(' : '[', i->min, 267 i->max, i->openmax ? ')' : ']'); 268 } 269 } 270 #endif 271 changed = r->func(params, r); 272 #ifdef RULES_DEBUG 273 if (r->var >= 0) { 274 printk(" -> "); 275 if (hw_is_mask(r->var)) 276 printk("%x", *m->bits); 277 else { 278 if (i->empty) 279 printk("empty"); 280 else 281 printk("%c%u %u%c", 282 i->openmin ? '(' : '[', i->min, 283 i->max, i->openmax ? ')' : ']'); 284 } 285 } 286 printk("\n"); 287 #endif 288 rstamps[k] = stamp; 289 if (changed && r->var >= 0) { 290 params->cmask |= (1 << r->var); 291 vstamps[r->var] = stamp; 292 again = 1; 293 } 294 if (changed < 0) 295 return changed; 296 stamp++; 297 } 298 } while (again); 299 if (!params->msbits) { 300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 301 if (snd_interval_single(i)) 302 params->msbits = snd_interval_value(i); 303 } 304 305 if (!params->rate_den) { 306 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 307 if (snd_interval_single(i)) { 308 params->rate_num = snd_interval_value(i); 309 params->rate_den = 1; 310 } 311 } 312 313 hw = &substream->runtime->hw; 314 if (!params->info) 315 params->info = hw->info; 316 if (!params->fifo_size) 317 params->fifo_size = hw->fifo_size; 318 params->rmask = 0; 319 return 0; 320 } 321 322 EXPORT_SYMBOL(snd_pcm_hw_refine); 323 324 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 325 struct snd_pcm_hw_params __user * _params) 326 { 327 struct snd_pcm_hw_params *params; 328 int err; 329 330 params = kmalloc(sizeof(*params), GFP_KERNEL); 331 if (!params) { 332 err = -ENOMEM; 333 goto out; 334 } 335 if (copy_from_user(params, _params, sizeof(*params))) { 336 err = -EFAULT; 337 goto out; 338 } 339 err = snd_pcm_hw_refine(substream, params); 340 if (copy_to_user(_params, params, sizeof(*params))) { 341 if (!err) 342 err = -EFAULT; 343 } 344 out: 345 kfree(params); 346 return err; 347 } 348 349 static int period_to_usecs(struct snd_pcm_runtime *runtime) 350 { 351 int usecs; 352 353 if (! runtime->rate) 354 return -1; /* invalid */ 355 356 /* take 75% of period time as the deadline */ 357 usecs = (750000 / runtime->rate) * runtime->period_size; 358 usecs += ((750000 % runtime->rate) * runtime->period_size) / 359 runtime->rate; 360 361 return usecs; 362 } 363 364 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 365 struct snd_pcm_hw_params *params) 366 { 367 struct snd_pcm_runtime *runtime; 368 int err, usecs; 369 unsigned int bits; 370 snd_pcm_uframes_t frames; 371 372 snd_assert(substream != NULL, return -ENXIO); 373 runtime = substream->runtime; 374 snd_assert(runtime != NULL, return -ENXIO); 375 snd_pcm_stream_lock_irq(substream); 376 switch (runtime->status->state) { 377 case SNDRV_PCM_STATE_OPEN: 378 case SNDRV_PCM_STATE_SETUP: 379 case SNDRV_PCM_STATE_PREPARED: 380 break; 381 default: 382 snd_pcm_stream_unlock_irq(substream); 383 return -EBADFD; 384 } 385 snd_pcm_stream_unlock_irq(substream); 386 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 387 if (!substream->oss.oss) 388 #endif 389 if (atomic_read(&substream->mmap_count)) 390 return -EBADFD; 391 392 params->rmask = ~0U; 393 err = snd_pcm_hw_refine(substream, params); 394 if (err < 0) 395 goto _error; 396 397 err = snd_pcm_hw_params_choose(substream, params); 398 if (err < 0) 399 goto _error; 400 401 if (substream->ops->hw_params != NULL) { 402 err = substream->ops->hw_params(substream, params); 403 if (err < 0) 404 goto _error; 405 } 406 407 runtime->access = params_access(params); 408 runtime->format = params_format(params); 409 runtime->subformat = params_subformat(params); 410 runtime->channels = params_channels(params); 411 runtime->rate = params_rate(params); 412 runtime->period_size = params_period_size(params); 413 runtime->periods = params_periods(params); 414 runtime->buffer_size = params_buffer_size(params); 415 runtime->info = params->info; 416 runtime->rate_num = params->rate_num; 417 runtime->rate_den = params->rate_den; 418 419 bits = snd_pcm_format_physical_width(runtime->format); 420 runtime->sample_bits = bits; 421 bits *= runtime->channels; 422 runtime->frame_bits = bits; 423 frames = 1; 424 while (bits % 8 != 0) { 425 bits *= 2; 426 frames *= 2; 427 } 428 runtime->byte_align = bits / 8; 429 runtime->min_align = frames; 430 431 /* Default sw params */ 432 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 433 runtime->period_step = 1; 434 runtime->control->avail_min = runtime->period_size; 435 runtime->start_threshold = 1; 436 runtime->stop_threshold = runtime->buffer_size; 437 runtime->silence_threshold = 0; 438 runtime->silence_size = 0; 439 runtime->boundary = runtime->buffer_size; 440 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 441 runtime->boundary *= 2; 442 443 snd_pcm_timer_resolution_change(substream); 444 runtime->status->state = SNDRV_PCM_STATE_SETUP; 445 446 remove_acceptable_latency(substream->latency_id); 447 if ((usecs = period_to_usecs(runtime)) >= 0) 448 set_acceptable_latency(substream->latency_id, usecs); 449 return 0; 450 _error: 451 /* hardware might be unuseable from this time, 452 so we force application to retry to set 453 the correct hardware parameter settings */ 454 runtime->status->state = SNDRV_PCM_STATE_OPEN; 455 if (substream->ops->hw_free != NULL) 456 substream->ops->hw_free(substream); 457 return err; 458 } 459 460 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 461 struct snd_pcm_hw_params __user * _params) 462 { 463 struct snd_pcm_hw_params *params; 464 int err; 465 466 params = kmalloc(sizeof(*params), GFP_KERNEL); 467 if (!params) { 468 err = -ENOMEM; 469 goto out; 470 } 471 if (copy_from_user(params, _params, sizeof(*params))) { 472 err = -EFAULT; 473 goto out; 474 } 475 err = snd_pcm_hw_params(substream, params); 476 if (copy_to_user(_params, params, sizeof(*params))) { 477 if (!err) 478 err = -EFAULT; 479 } 480 out: 481 kfree(params); 482 return err; 483 } 484 485 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 486 { 487 struct snd_pcm_runtime *runtime; 488 int result = 0; 489 490 snd_assert(substream != NULL, return -ENXIO); 491 runtime = substream->runtime; 492 snd_assert(runtime != NULL, return -ENXIO); 493 snd_pcm_stream_lock_irq(substream); 494 switch (runtime->status->state) { 495 case SNDRV_PCM_STATE_SETUP: 496 case SNDRV_PCM_STATE_PREPARED: 497 break; 498 default: 499 snd_pcm_stream_unlock_irq(substream); 500 return -EBADFD; 501 } 502 snd_pcm_stream_unlock_irq(substream); 503 if (atomic_read(&substream->mmap_count)) 504 return -EBADFD; 505 if (substream->ops->hw_free) 506 result = substream->ops->hw_free(substream); 507 runtime->status->state = SNDRV_PCM_STATE_OPEN; 508 remove_acceptable_latency(substream->latency_id); 509 return result; 510 } 511 512 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 513 struct snd_pcm_sw_params *params) 514 { 515 struct snd_pcm_runtime *runtime; 516 517 snd_assert(substream != NULL, return -ENXIO); 518 runtime = substream->runtime; 519 snd_assert(runtime != NULL, return -ENXIO); 520 snd_pcm_stream_lock_irq(substream); 521 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 522 snd_pcm_stream_unlock_irq(substream); 523 return -EBADFD; 524 } 525 snd_pcm_stream_unlock_irq(substream); 526 527 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 528 return -EINVAL; 529 if (params->avail_min == 0) 530 return -EINVAL; 531 if (params->silence_size >= runtime->boundary) { 532 if (params->silence_threshold != 0) 533 return -EINVAL; 534 } else { 535 if (params->silence_size > params->silence_threshold) 536 return -EINVAL; 537 if (params->silence_threshold > runtime->buffer_size) 538 return -EINVAL; 539 } 540 snd_pcm_stream_lock_irq(substream); 541 runtime->tstamp_mode = params->tstamp_mode; 542 runtime->period_step = params->period_step; 543 runtime->control->avail_min = params->avail_min; 544 runtime->start_threshold = params->start_threshold; 545 runtime->stop_threshold = params->stop_threshold; 546 runtime->silence_threshold = params->silence_threshold; 547 runtime->silence_size = params->silence_size; 548 params->boundary = runtime->boundary; 549 if (snd_pcm_running(substream)) { 550 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 551 runtime->silence_size > 0) 552 snd_pcm_playback_silence(substream, ULONG_MAX); 553 wake_up(&runtime->sleep); 554 } 555 snd_pcm_stream_unlock_irq(substream); 556 return 0; 557 } 558 559 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 560 struct snd_pcm_sw_params __user * _params) 561 { 562 struct snd_pcm_sw_params params; 563 int err; 564 if (copy_from_user(¶ms, _params, sizeof(params))) 565 return -EFAULT; 566 err = snd_pcm_sw_params(substream, ¶ms); 567 if (copy_to_user(_params, ¶ms, sizeof(params))) 568 return -EFAULT; 569 return err; 570 } 571 572 int snd_pcm_status(struct snd_pcm_substream *substream, 573 struct snd_pcm_status *status) 574 { 575 struct snd_pcm_runtime *runtime = substream->runtime; 576 577 snd_pcm_stream_lock_irq(substream); 578 status->state = runtime->status->state; 579 status->suspended_state = runtime->status->suspended_state; 580 if (status->state == SNDRV_PCM_STATE_OPEN) 581 goto _end; 582 status->trigger_tstamp = runtime->trigger_tstamp; 583 if (snd_pcm_running(substream)) 584 snd_pcm_update_hw_ptr(substream); 585 snd_pcm_gettime(runtime, &status->tstamp); 586 status->appl_ptr = runtime->control->appl_ptr; 587 status->hw_ptr = runtime->status->hw_ptr; 588 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 589 status->avail = snd_pcm_playback_avail(runtime); 590 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 591 runtime->status->state == SNDRV_PCM_STATE_DRAINING) 592 status->delay = runtime->buffer_size - status->avail; 593 else 594 status->delay = 0; 595 } else { 596 status->avail = snd_pcm_capture_avail(runtime); 597 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 598 status->delay = status->avail; 599 else 600 status->delay = 0; 601 } 602 status->avail_max = runtime->avail_max; 603 status->overrange = runtime->overrange; 604 runtime->avail_max = 0; 605 runtime->overrange = 0; 606 _end: 607 snd_pcm_stream_unlock_irq(substream); 608 return 0; 609 } 610 611 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 612 struct snd_pcm_status __user * _status) 613 { 614 struct snd_pcm_status status; 615 struct snd_pcm_runtime *runtime; 616 int res; 617 618 snd_assert(substream != NULL, return -ENXIO); 619 runtime = substream->runtime; 620 memset(&status, 0, sizeof(status)); 621 res = snd_pcm_status(substream, &status); 622 if (res < 0) 623 return res; 624 if (copy_to_user(_status, &status, sizeof(status))) 625 return -EFAULT; 626 return 0; 627 } 628 629 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 630 struct snd_pcm_channel_info * info) 631 { 632 struct snd_pcm_runtime *runtime; 633 unsigned int channel; 634 635 snd_assert(substream != NULL, return -ENXIO); 636 channel = info->channel; 637 runtime = substream->runtime; 638 snd_pcm_stream_lock_irq(substream); 639 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 640 snd_pcm_stream_unlock_irq(substream); 641 return -EBADFD; 642 } 643 snd_pcm_stream_unlock_irq(substream); 644 if (channel >= runtime->channels) 645 return -EINVAL; 646 memset(info, 0, sizeof(*info)); 647 info->channel = channel; 648 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 649 } 650 651 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 652 struct snd_pcm_channel_info __user * _info) 653 { 654 struct snd_pcm_channel_info info; 655 int res; 656 657 if (copy_from_user(&info, _info, sizeof(info))) 658 return -EFAULT; 659 res = snd_pcm_channel_info(substream, &info); 660 if (res < 0) 661 return res; 662 if (copy_to_user(_info, &info, sizeof(info))) 663 return -EFAULT; 664 return 0; 665 } 666 667 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 668 { 669 struct snd_pcm_runtime *runtime = substream->runtime; 670 if (runtime->trigger_master == NULL) 671 return; 672 if (runtime->trigger_master == substream) { 673 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 674 } else { 675 snd_pcm_trigger_tstamp(runtime->trigger_master); 676 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 677 } 678 runtime->trigger_master = NULL; 679 } 680 681 struct action_ops { 682 int (*pre_action)(struct snd_pcm_substream *substream, int state); 683 int (*do_action)(struct snd_pcm_substream *substream, int state); 684 void (*undo_action)(struct snd_pcm_substream *substream, int state); 685 void (*post_action)(struct snd_pcm_substream *substream, int state); 686 }; 687 688 /* 689 * this functions is core for handling of linked stream 690 * Note: the stream state might be changed also on failure 691 * Note2: call with calling stream lock + link lock 692 */ 693 static int snd_pcm_action_group(struct action_ops *ops, 694 struct snd_pcm_substream *substream, 695 int state, int do_lock) 696 { 697 struct snd_pcm_substream *s = NULL; 698 struct snd_pcm_substream *s1; 699 int res = 0; 700 701 snd_pcm_group_for_each_entry(s, substream) { 702 if (do_lock && s != substream) 703 spin_lock_nested(&s->self_group.lock, 704 SINGLE_DEPTH_NESTING); 705 res = ops->pre_action(s, state); 706 if (res < 0) 707 goto _unlock; 708 } 709 snd_pcm_group_for_each_entry(s, substream) { 710 res = ops->do_action(s, state); 711 if (res < 0) { 712 if (ops->undo_action) { 713 snd_pcm_group_for_each_entry(s1, substream) { 714 if (s1 == s) /* failed stream */ 715 break; 716 ops->undo_action(s1, state); 717 } 718 } 719 s = NULL; /* unlock all */ 720 goto _unlock; 721 } 722 } 723 snd_pcm_group_for_each_entry(s, substream) { 724 ops->post_action(s, state); 725 } 726 _unlock: 727 if (do_lock) { 728 /* unlock streams */ 729 snd_pcm_group_for_each_entry(s1, substream) { 730 if (s1 != substream) 731 spin_unlock(&s1->self_group.lock); 732 if (s1 == s) /* end */ 733 break; 734 } 735 } 736 return res; 737 } 738 739 /* 740 * Note: call with stream lock 741 */ 742 static int snd_pcm_action_single(struct action_ops *ops, 743 struct snd_pcm_substream *substream, 744 int state) 745 { 746 int res; 747 748 res = ops->pre_action(substream, state); 749 if (res < 0) 750 return res; 751 res = ops->do_action(substream, state); 752 if (res == 0) 753 ops->post_action(substream, state); 754 else if (ops->undo_action) 755 ops->undo_action(substream, state); 756 return res; 757 } 758 759 /* 760 * Note: call with stream lock 761 */ 762 static int snd_pcm_action(struct action_ops *ops, 763 struct snd_pcm_substream *substream, 764 int state) 765 { 766 int res; 767 768 if (snd_pcm_stream_linked(substream)) { 769 if (!spin_trylock(&substream->group->lock)) { 770 spin_unlock(&substream->self_group.lock); 771 spin_lock(&substream->group->lock); 772 spin_lock(&substream->self_group.lock); 773 } 774 res = snd_pcm_action_group(ops, substream, state, 1); 775 spin_unlock(&substream->group->lock); 776 } else { 777 res = snd_pcm_action_single(ops, substream, state); 778 } 779 return res; 780 } 781 782 /* 783 * Note: don't use any locks before 784 */ 785 static int snd_pcm_action_lock_irq(struct action_ops *ops, 786 struct snd_pcm_substream *substream, 787 int state) 788 { 789 int res; 790 791 read_lock_irq(&snd_pcm_link_rwlock); 792 if (snd_pcm_stream_linked(substream)) { 793 spin_lock(&substream->group->lock); 794 spin_lock(&substream->self_group.lock); 795 res = snd_pcm_action_group(ops, substream, state, 1); 796 spin_unlock(&substream->self_group.lock); 797 spin_unlock(&substream->group->lock); 798 } else { 799 spin_lock(&substream->self_group.lock); 800 res = snd_pcm_action_single(ops, substream, state); 801 spin_unlock(&substream->self_group.lock); 802 } 803 read_unlock_irq(&snd_pcm_link_rwlock); 804 return res; 805 } 806 807 /* 808 */ 809 static int snd_pcm_action_nonatomic(struct action_ops *ops, 810 struct snd_pcm_substream *substream, 811 int state) 812 { 813 int res; 814 815 down_read(&snd_pcm_link_rwsem); 816 if (snd_pcm_stream_linked(substream)) 817 res = snd_pcm_action_group(ops, substream, state, 0); 818 else 819 res = snd_pcm_action_single(ops, substream, state); 820 up_read(&snd_pcm_link_rwsem); 821 return res; 822 } 823 824 /* 825 * start callbacks 826 */ 827 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 828 { 829 struct snd_pcm_runtime *runtime = substream->runtime; 830 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 831 return -EBADFD; 832 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 833 !snd_pcm_playback_data(substream)) 834 return -EPIPE; 835 runtime->trigger_master = substream; 836 return 0; 837 } 838 839 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 840 { 841 if (substream->runtime->trigger_master != substream) 842 return 0; 843 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 844 } 845 846 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 847 { 848 if (substream->runtime->trigger_master == substream) 849 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 850 } 851 852 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 853 { 854 struct snd_pcm_runtime *runtime = substream->runtime; 855 snd_pcm_trigger_tstamp(substream); 856 runtime->status->state = state; 857 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 858 runtime->silence_size > 0) 859 snd_pcm_playback_silence(substream, ULONG_MAX); 860 if (substream->timer) 861 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 862 &runtime->trigger_tstamp); 863 } 864 865 static struct action_ops snd_pcm_action_start = { 866 .pre_action = snd_pcm_pre_start, 867 .do_action = snd_pcm_do_start, 868 .undo_action = snd_pcm_undo_start, 869 .post_action = snd_pcm_post_start 870 }; 871 872 /** 873 * snd_pcm_start 874 * @substream: the PCM substream instance 875 * 876 * Start all linked streams. 877 */ 878 int snd_pcm_start(struct snd_pcm_substream *substream) 879 { 880 return snd_pcm_action(&snd_pcm_action_start, substream, 881 SNDRV_PCM_STATE_RUNNING); 882 } 883 884 /* 885 * stop callbacks 886 */ 887 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 888 { 889 struct snd_pcm_runtime *runtime = substream->runtime; 890 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 891 return -EBADFD; 892 runtime->trigger_master = substream; 893 return 0; 894 } 895 896 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 897 { 898 if (substream->runtime->trigger_master == substream && 899 snd_pcm_running(substream)) 900 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 901 return 0; /* unconditonally stop all substreams */ 902 } 903 904 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 905 { 906 struct snd_pcm_runtime *runtime = substream->runtime; 907 if (runtime->status->state != state) { 908 snd_pcm_trigger_tstamp(substream); 909 if (substream->timer) 910 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 911 &runtime->trigger_tstamp); 912 runtime->status->state = state; 913 } 914 wake_up(&runtime->sleep); 915 } 916 917 static struct action_ops snd_pcm_action_stop = { 918 .pre_action = snd_pcm_pre_stop, 919 .do_action = snd_pcm_do_stop, 920 .post_action = snd_pcm_post_stop 921 }; 922 923 /** 924 * snd_pcm_stop 925 * @substream: the PCM substream instance 926 * @state: PCM state after stopping the stream 927 * 928 * Try to stop all running streams in the substream group. 929 * The state of each stream is changed to the given value after that unconditionally. 930 */ 931 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 932 { 933 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 934 } 935 936 EXPORT_SYMBOL(snd_pcm_stop); 937 938 /** 939 * snd_pcm_drain_done 940 * @substream: the PCM substream 941 * 942 * Stop the DMA only when the given stream is playback. 943 * The state is changed to SETUP. 944 * Unlike snd_pcm_stop(), this affects only the given stream. 945 */ 946 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 947 { 948 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 949 SNDRV_PCM_STATE_SETUP); 950 } 951 952 /* 953 * pause callbacks 954 */ 955 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 956 { 957 struct snd_pcm_runtime *runtime = substream->runtime; 958 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 959 return -ENOSYS; 960 if (push) { 961 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 962 return -EBADFD; 963 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 964 return -EBADFD; 965 runtime->trigger_master = substream; 966 return 0; 967 } 968 969 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 970 { 971 if (substream->runtime->trigger_master != substream) 972 return 0; 973 return substream->ops->trigger(substream, 974 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 975 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 976 } 977 978 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 979 { 980 if (substream->runtime->trigger_master == substream) 981 substream->ops->trigger(substream, 982 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 983 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 984 } 985 986 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 987 { 988 struct snd_pcm_runtime *runtime = substream->runtime; 989 snd_pcm_trigger_tstamp(substream); 990 if (push) { 991 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 992 if (substream->timer) 993 snd_timer_notify(substream->timer, 994 SNDRV_TIMER_EVENT_MPAUSE, 995 &runtime->trigger_tstamp); 996 wake_up(&runtime->sleep); 997 } else { 998 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 999 if (substream->timer) 1000 snd_timer_notify(substream->timer, 1001 SNDRV_TIMER_EVENT_MCONTINUE, 1002 &runtime->trigger_tstamp); 1003 } 1004 } 1005 1006 static struct action_ops snd_pcm_action_pause = { 1007 .pre_action = snd_pcm_pre_pause, 1008 .do_action = snd_pcm_do_pause, 1009 .undo_action = snd_pcm_undo_pause, 1010 .post_action = snd_pcm_post_pause 1011 }; 1012 1013 /* 1014 * Push/release the pause for all linked streams. 1015 */ 1016 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1017 { 1018 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1019 } 1020 1021 #ifdef CONFIG_PM 1022 /* suspend */ 1023 1024 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1025 { 1026 struct snd_pcm_runtime *runtime = substream->runtime; 1027 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1028 return -EBUSY; 1029 runtime->trigger_master = substream; 1030 return 0; 1031 } 1032 1033 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1034 { 1035 struct snd_pcm_runtime *runtime = substream->runtime; 1036 if (runtime->trigger_master != substream) 1037 return 0; 1038 if (! snd_pcm_running(substream)) 1039 return 0; 1040 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1041 return 0; /* suspend unconditionally */ 1042 } 1043 1044 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1045 { 1046 struct snd_pcm_runtime *runtime = substream->runtime; 1047 snd_pcm_trigger_tstamp(substream); 1048 if (substream->timer) 1049 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1050 &runtime->trigger_tstamp); 1051 runtime->status->suspended_state = runtime->status->state; 1052 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1053 wake_up(&runtime->sleep); 1054 } 1055 1056 static struct action_ops snd_pcm_action_suspend = { 1057 .pre_action = snd_pcm_pre_suspend, 1058 .do_action = snd_pcm_do_suspend, 1059 .post_action = snd_pcm_post_suspend 1060 }; 1061 1062 /** 1063 * snd_pcm_suspend 1064 * @substream: the PCM substream 1065 * 1066 * Trigger SUSPEND to all linked streams. 1067 * After this call, all streams are changed to SUSPENDED state. 1068 */ 1069 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1070 { 1071 int err; 1072 unsigned long flags; 1073 1074 if (! substream) 1075 return 0; 1076 1077 snd_pcm_stream_lock_irqsave(substream, flags); 1078 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1079 snd_pcm_stream_unlock_irqrestore(substream, flags); 1080 return err; 1081 } 1082 1083 EXPORT_SYMBOL(snd_pcm_suspend); 1084 1085 /** 1086 * snd_pcm_suspend_all 1087 * @pcm: the PCM instance 1088 * 1089 * Trigger SUSPEND to all substreams in the given pcm. 1090 * After this call, all streams are changed to SUSPENDED state. 1091 */ 1092 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1093 { 1094 struct snd_pcm_substream *substream; 1095 int stream, err = 0; 1096 1097 if (! pcm) 1098 return 0; 1099 1100 for (stream = 0; stream < 2; stream++) { 1101 for (substream = pcm->streams[stream].substream; 1102 substream; substream = substream->next) { 1103 /* FIXME: the open/close code should lock this as well */ 1104 if (substream->runtime == NULL) 1105 continue; 1106 err = snd_pcm_suspend(substream); 1107 if (err < 0 && err != -EBUSY) 1108 return err; 1109 } 1110 } 1111 return 0; 1112 } 1113 1114 EXPORT_SYMBOL(snd_pcm_suspend_all); 1115 1116 /* resume */ 1117 1118 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1119 { 1120 struct snd_pcm_runtime *runtime = substream->runtime; 1121 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1122 return -ENOSYS; 1123 runtime->trigger_master = substream; 1124 return 0; 1125 } 1126 1127 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1128 { 1129 struct snd_pcm_runtime *runtime = substream->runtime; 1130 if (runtime->trigger_master != substream) 1131 return 0; 1132 /* DMA not running previously? */ 1133 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1134 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1135 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1136 return 0; 1137 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1138 } 1139 1140 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1141 { 1142 if (substream->runtime->trigger_master == substream && 1143 snd_pcm_running(substream)) 1144 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1145 } 1146 1147 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1148 { 1149 struct snd_pcm_runtime *runtime = substream->runtime; 1150 snd_pcm_trigger_tstamp(substream); 1151 if (substream->timer) 1152 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1153 &runtime->trigger_tstamp); 1154 runtime->status->state = runtime->status->suspended_state; 1155 } 1156 1157 static struct action_ops snd_pcm_action_resume = { 1158 .pre_action = snd_pcm_pre_resume, 1159 .do_action = snd_pcm_do_resume, 1160 .undo_action = snd_pcm_undo_resume, 1161 .post_action = snd_pcm_post_resume 1162 }; 1163 1164 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1165 { 1166 struct snd_card *card = substream->pcm->card; 1167 int res; 1168 1169 snd_power_lock(card); 1170 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1171 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1172 snd_power_unlock(card); 1173 return res; 1174 } 1175 1176 #else 1177 1178 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1179 { 1180 return -ENOSYS; 1181 } 1182 1183 #endif /* CONFIG_PM */ 1184 1185 /* 1186 * xrun ioctl 1187 * 1188 * Change the RUNNING stream(s) to XRUN state. 1189 */ 1190 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1191 { 1192 struct snd_card *card = substream->pcm->card; 1193 struct snd_pcm_runtime *runtime = substream->runtime; 1194 int result; 1195 1196 snd_power_lock(card); 1197 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1198 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1199 if (result < 0) 1200 goto _unlock; 1201 } 1202 1203 snd_pcm_stream_lock_irq(substream); 1204 switch (runtime->status->state) { 1205 case SNDRV_PCM_STATE_XRUN: 1206 result = 0; /* already there */ 1207 break; 1208 case SNDRV_PCM_STATE_RUNNING: 1209 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1210 break; 1211 default: 1212 result = -EBADFD; 1213 } 1214 snd_pcm_stream_unlock_irq(substream); 1215 _unlock: 1216 snd_power_unlock(card); 1217 return result; 1218 } 1219 1220 /* 1221 * reset ioctl 1222 */ 1223 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1224 { 1225 struct snd_pcm_runtime *runtime = substream->runtime; 1226 switch (runtime->status->state) { 1227 case SNDRV_PCM_STATE_RUNNING: 1228 case SNDRV_PCM_STATE_PREPARED: 1229 case SNDRV_PCM_STATE_PAUSED: 1230 case SNDRV_PCM_STATE_SUSPENDED: 1231 return 0; 1232 default: 1233 return -EBADFD; 1234 } 1235 } 1236 1237 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1238 { 1239 struct snd_pcm_runtime *runtime = substream->runtime; 1240 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1241 if (err < 0) 1242 return err; 1243 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); 1244 runtime->hw_ptr_base = 0; 1245 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1246 runtime->status->hw_ptr % runtime->period_size; 1247 runtime->silence_start = runtime->status->hw_ptr; 1248 runtime->silence_filled = 0; 1249 return 0; 1250 } 1251 1252 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1253 { 1254 struct snd_pcm_runtime *runtime = substream->runtime; 1255 runtime->control->appl_ptr = runtime->status->hw_ptr; 1256 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1257 runtime->silence_size > 0) 1258 snd_pcm_playback_silence(substream, ULONG_MAX); 1259 } 1260 1261 static struct action_ops snd_pcm_action_reset = { 1262 .pre_action = snd_pcm_pre_reset, 1263 .do_action = snd_pcm_do_reset, 1264 .post_action = snd_pcm_post_reset 1265 }; 1266 1267 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1268 { 1269 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1270 } 1271 1272 /* 1273 * prepare ioctl 1274 */ 1275 /* we use the second argument for updating f_flags */ 1276 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1277 int f_flags) 1278 { 1279 struct snd_pcm_runtime *runtime = substream->runtime; 1280 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1281 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1282 return -EBADFD; 1283 if (snd_pcm_running(substream)) 1284 return -EBUSY; 1285 substream->f_flags = f_flags; 1286 return 0; 1287 } 1288 1289 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1290 { 1291 int err; 1292 err = substream->ops->prepare(substream); 1293 if (err < 0) 1294 return err; 1295 return snd_pcm_do_reset(substream, 0); 1296 } 1297 1298 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1299 { 1300 struct snd_pcm_runtime *runtime = substream->runtime; 1301 runtime->control->appl_ptr = runtime->status->hw_ptr; 1302 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1303 } 1304 1305 static struct action_ops snd_pcm_action_prepare = { 1306 .pre_action = snd_pcm_pre_prepare, 1307 .do_action = snd_pcm_do_prepare, 1308 .post_action = snd_pcm_post_prepare 1309 }; 1310 1311 /** 1312 * snd_pcm_prepare 1313 * @substream: the PCM substream instance 1314 * @file: file to refer f_flags 1315 * 1316 * Prepare the PCM substream to be triggerable. 1317 */ 1318 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1319 struct file *file) 1320 { 1321 int res; 1322 struct snd_card *card = substream->pcm->card; 1323 int f_flags; 1324 1325 if (file) 1326 f_flags = file->f_flags; 1327 else 1328 f_flags = substream->f_flags; 1329 1330 snd_power_lock(card); 1331 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1332 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1333 substream, f_flags); 1334 snd_power_unlock(card); 1335 return res; 1336 } 1337 1338 /* 1339 * drain ioctl 1340 */ 1341 1342 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1343 { 1344 if (substream->f_flags & O_NONBLOCK) 1345 return -EAGAIN; 1346 substream->runtime->trigger_master = substream; 1347 return 0; 1348 } 1349 1350 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1351 { 1352 struct snd_pcm_runtime *runtime = substream->runtime; 1353 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1354 switch (runtime->status->state) { 1355 case SNDRV_PCM_STATE_PREPARED: 1356 /* start playback stream if possible */ 1357 if (! snd_pcm_playback_empty(substream)) { 1358 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1359 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1360 } 1361 break; 1362 case SNDRV_PCM_STATE_RUNNING: 1363 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1364 break; 1365 default: 1366 break; 1367 } 1368 } else { 1369 /* stop running stream */ 1370 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1371 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1372 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1373 snd_pcm_do_stop(substream, new_state); 1374 snd_pcm_post_stop(substream, new_state); 1375 } 1376 } 1377 return 0; 1378 } 1379 1380 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1381 { 1382 } 1383 1384 static struct action_ops snd_pcm_action_drain_init = { 1385 .pre_action = snd_pcm_pre_drain_init, 1386 .do_action = snd_pcm_do_drain_init, 1387 .post_action = snd_pcm_post_drain_init 1388 }; 1389 1390 struct drain_rec { 1391 struct snd_pcm_substream *substream; 1392 wait_queue_t wait; 1393 snd_pcm_uframes_t stop_threshold; 1394 }; 1395 1396 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1397 1398 /* 1399 * Drain the stream(s). 1400 * When the substream is linked, sync until the draining of all playback streams 1401 * is finished. 1402 * After this call, all streams are supposed to be either SETUP or DRAINING 1403 * (capture only) state. 1404 */ 1405 static int snd_pcm_drain(struct snd_pcm_substream *substream) 1406 { 1407 struct snd_card *card; 1408 struct snd_pcm_runtime *runtime; 1409 struct snd_pcm_substream *s; 1410 int result = 0; 1411 int i, num_drecs; 1412 struct drain_rec *drec, drec_tmp, *d; 1413 1414 snd_assert(substream != NULL, return -ENXIO); 1415 card = substream->pcm->card; 1416 runtime = substream->runtime; 1417 1418 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1419 return -EBADFD; 1420 1421 snd_power_lock(card); 1422 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1423 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1424 if (result < 0) { 1425 snd_power_unlock(card); 1426 return result; 1427 } 1428 } 1429 1430 /* allocate temporary record for drain sync */ 1431 down_read(&snd_pcm_link_rwsem); 1432 if (snd_pcm_stream_linked(substream)) { 1433 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); 1434 if (! drec) { 1435 up_read(&snd_pcm_link_rwsem); 1436 snd_power_unlock(card); 1437 return -ENOMEM; 1438 } 1439 } else 1440 drec = &drec_tmp; 1441 1442 /* count only playback streams */ 1443 num_drecs = 0; 1444 snd_pcm_group_for_each_entry(s, substream) { 1445 runtime = s->runtime; 1446 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1447 d = &drec[num_drecs++]; 1448 d->substream = s; 1449 init_waitqueue_entry(&d->wait, current); 1450 add_wait_queue(&runtime->sleep, &d->wait); 1451 /* stop_threshold fixup to avoid endless loop when 1452 * stop_threshold > buffer_size 1453 */ 1454 d->stop_threshold = runtime->stop_threshold; 1455 if (runtime->stop_threshold > runtime->buffer_size) 1456 runtime->stop_threshold = runtime->buffer_size; 1457 } 1458 } 1459 up_read(&snd_pcm_link_rwsem); 1460 1461 snd_pcm_stream_lock_irq(substream); 1462 /* resume pause */ 1463 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1464 snd_pcm_pause(substream, 0); 1465 1466 /* pre-start/stop - all running streams are changed to DRAINING state */ 1467 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1468 if (result < 0) { 1469 snd_pcm_stream_unlock_irq(substream); 1470 goto _error; 1471 } 1472 1473 for (;;) { 1474 long tout; 1475 if (signal_pending(current)) { 1476 result = -ERESTARTSYS; 1477 break; 1478 } 1479 /* all finished? */ 1480 for (i = 0; i < num_drecs; i++) { 1481 runtime = drec[i].substream->runtime; 1482 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) 1483 break; 1484 } 1485 if (i == num_drecs) 1486 break; /* yes, all drained */ 1487 1488 set_current_state(TASK_INTERRUPTIBLE); 1489 snd_pcm_stream_unlock_irq(substream); 1490 snd_power_unlock(card); 1491 tout = schedule_timeout(10 * HZ); 1492 snd_power_lock(card); 1493 snd_pcm_stream_lock_irq(substream); 1494 if (tout == 0) { 1495 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1496 result = -ESTRPIPE; 1497 else { 1498 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1499 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1500 result = -EIO; 1501 } 1502 break; 1503 } 1504 } 1505 1506 snd_pcm_stream_unlock_irq(substream); 1507 1508 _error: 1509 for (i = 0; i < num_drecs; i++) { 1510 d = &drec[i]; 1511 runtime = d->substream->runtime; 1512 remove_wait_queue(&runtime->sleep, &d->wait); 1513 runtime->stop_threshold = d->stop_threshold; 1514 } 1515 1516 if (drec != &drec_tmp) 1517 kfree(drec); 1518 snd_power_unlock(card); 1519 1520 return result; 1521 } 1522 1523 /* 1524 * drop ioctl 1525 * 1526 * Immediately put all linked substreams into SETUP state. 1527 */ 1528 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1529 { 1530 struct snd_pcm_runtime *runtime; 1531 struct snd_card *card; 1532 int result = 0; 1533 1534 snd_assert(substream != NULL, return -ENXIO); 1535 runtime = substream->runtime; 1536 card = substream->pcm->card; 1537 1538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1539 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1540 return -EBADFD; 1541 1542 snd_power_lock(card); 1543 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1544 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1545 if (result < 0) 1546 goto _unlock; 1547 } 1548 1549 snd_pcm_stream_lock_irq(substream); 1550 /* resume pause */ 1551 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1552 snd_pcm_pause(substream, 0); 1553 1554 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1555 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1556 snd_pcm_stream_unlock_irq(substream); 1557 _unlock: 1558 snd_power_unlock(card); 1559 return result; 1560 } 1561 1562 1563 /* WARNING: Don't forget to fput back the file */ 1564 static struct file *snd_pcm_file_fd(int fd) 1565 { 1566 struct file *file; 1567 struct inode *inode; 1568 unsigned int minor; 1569 1570 file = fget(fd); 1571 if (!file) 1572 return NULL; 1573 inode = file->f_path.dentry->d_inode; 1574 if (!S_ISCHR(inode->i_mode) || 1575 imajor(inode) != snd_major) { 1576 fput(file); 1577 return NULL; 1578 } 1579 minor = iminor(inode); 1580 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1581 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1582 fput(file); 1583 return NULL; 1584 } 1585 return file; 1586 } 1587 1588 /* 1589 * PCM link handling 1590 */ 1591 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1592 { 1593 int res = 0; 1594 struct file *file; 1595 struct snd_pcm_file *pcm_file; 1596 struct snd_pcm_substream *substream1; 1597 1598 file = snd_pcm_file_fd(fd); 1599 if (!file) 1600 return -EBADFD; 1601 pcm_file = file->private_data; 1602 substream1 = pcm_file->substream; 1603 down_write(&snd_pcm_link_rwsem); 1604 write_lock_irq(&snd_pcm_link_rwlock); 1605 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1606 substream->runtime->status->state != substream1->runtime->status->state) { 1607 res = -EBADFD; 1608 goto _end; 1609 } 1610 if (snd_pcm_stream_linked(substream1)) { 1611 res = -EALREADY; 1612 goto _end; 1613 } 1614 if (!snd_pcm_stream_linked(substream)) { 1615 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1616 if (substream->group == NULL) { 1617 res = -ENOMEM; 1618 goto _end; 1619 } 1620 spin_lock_init(&substream->group->lock); 1621 INIT_LIST_HEAD(&substream->group->substreams); 1622 list_add_tail(&substream->link_list, &substream->group->substreams); 1623 substream->group->count = 1; 1624 } 1625 list_add_tail(&substream1->link_list, &substream->group->substreams); 1626 substream->group->count++; 1627 substream1->group = substream->group; 1628 _end: 1629 write_unlock_irq(&snd_pcm_link_rwlock); 1630 up_write(&snd_pcm_link_rwsem); 1631 fput(file); 1632 return res; 1633 } 1634 1635 static void relink_to_local(struct snd_pcm_substream *substream) 1636 { 1637 substream->group = &substream->self_group; 1638 INIT_LIST_HEAD(&substream->self_group.substreams); 1639 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1640 } 1641 1642 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1643 { 1644 struct snd_pcm_substream *s; 1645 int res = 0; 1646 1647 down_write(&snd_pcm_link_rwsem); 1648 write_lock_irq(&snd_pcm_link_rwlock); 1649 if (!snd_pcm_stream_linked(substream)) { 1650 res = -EALREADY; 1651 goto _end; 1652 } 1653 list_del(&substream->link_list); 1654 substream->group->count--; 1655 if (substream->group->count == 1) { /* detach the last stream, too */ 1656 snd_pcm_group_for_each_entry(s, substream) { 1657 relink_to_local(s); 1658 break; 1659 } 1660 kfree(substream->group); 1661 } 1662 relink_to_local(substream); 1663 _end: 1664 write_unlock_irq(&snd_pcm_link_rwlock); 1665 up_write(&snd_pcm_link_rwsem); 1666 return res; 1667 } 1668 1669 /* 1670 * hw configurator 1671 */ 1672 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1673 struct snd_pcm_hw_rule *rule) 1674 { 1675 struct snd_interval t; 1676 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1677 hw_param_interval_c(params, rule->deps[1]), &t); 1678 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1679 } 1680 1681 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1682 struct snd_pcm_hw_rule *rule) 1683 { 1684 struct snd_interval t; 1685 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1686 hw_param_interval_c(params, rule->deps[1]), &t); 1687 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1688 } 1689 1690 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1691 struct snd_pcm_hw_rule *rule) 1692 { 1693 struct snd_interval t; 1694 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1695 hw_param_interval_c(params, rule->deps[1]), 1696 (unsigned long) rule->private, &t); 1697 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1698 } 1699 1700 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1701 struct snd_pcm_hw_rule *rule) 1702 { 1703 struct snd_interval t; 1704 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1705 (unsigned long) rule->private, 1706 hw_param_interval_c(params, rule->deps[1]), &t); 1707 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1708 } 1709 1710 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1711 struct snd_pcm_hw_rule *rule) 1712 { 1713 unsigned int k; 1714 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1715 struct snd_mask m; 1716 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1717 snd_mask_any(&m); 1718 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1719 int bits; 1720 if (! snd_mask_test(mask, k)) 1721 continue; 1722 bits = snd_pcm_format_physical_width(k); 1723 if (bits <= 0) 1724 continue; /* ignore invalid formats */ 1725 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1726 snd_mask_reset(&m, k); 1727 } 1728 return snd_mask_refine(mask, &m); 1729 } 1730 1731 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1732 struct snd_pcm_hw_rule *rule) 1733 { 1734 struct snd_interval t; 1735 unsigned int k; 1736 t.min = UINT_MAX; 1737 t.max = 0; 1738 t.openmin = 0; 1739 t.openmax = 0; 1740 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1741 int bits; 1742 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1743 continue; 1744 bits = snd_pcm_format_physical_width(k); 1745 if (bits <= 0) 1746 continue; /* ignore invalid formats */ 1747 if (t.min > (unsigned)bits) 1748 t.min = bits; 1749 if (t.max < (unsigned)bits) 1750 t.max = bits; 1751 } 1752 t.integer = 1; 1753 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1754 } 1755 1756 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1757 #error "Change this table" 1758 #endif 1759 1760 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1761 48000, 64000, 88200, 96000, 176400, 192000 }; 1762 1763 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1764 .count = ARRAY_SIZE(rates), 1765 .list = rates, 1766 }; 1767 1768 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1769 struct snd_pcm_hw_rule *rule) 1770 { 1771 struct snd_pcm_hardware *hw = rule->private; 1772 return snd_interval_list(hw_param_interval(params, rule->var), 1773 snd_pcm_known_rates.count, 1774 snd_pcm_known_rates.list, hw->rates); 1775 } 1776 1777 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1778 struct snd_pcm_hw_rule *rule) 1779 { 1780 struct snd_interval t; 1781 struct snd_pcm_substream *substream = rule->private; 1782 t.min = 0; 1783 t.max = substream->buffer_bytes_max; 1784 t.openmin = 0; 1785 t.openmax = 0; 1786 t.integer = 1; 1787 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1788 } 1789 1790 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1791 { 1792 struct snd_pcm_runtime *runtime = substream->runtime; 1793 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1794 int k, err; 1795 1796 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1797 snd_mask_any(constrs_mask(constrs, k)); 1798 } 1799 1800 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1801 snd_interval_any(constrs_interval(constrs, k)); 1802 } 1803 1804 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1805 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1806 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1807 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1808 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1809 1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1811 snd_pcm_hw_rule_format, NULL, 1812 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1813 if (err < 0) 1814 return err; 1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1816 snd_pcm_hw_rule_sample_bits, NULL, 1817 SNDRV_PCM_HW_PARAM_FORMAT, 1818 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1819 if (err < 0) 1820 return err; 1821 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1822 snd_pcm_hw_rule_div, NULL, 1823 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1824 if (err < 0) 1825 return err; 1826 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1827 snd_pcm_hw_rule_mul, NULL, 1828 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1829 if (err < 0) 1830 return err; 1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1832 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1833 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1834 if (err < 0) 1835 return err; 1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1837 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1838 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1839 if (err < 0) 1840 return err; 1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1842 snd_pcm_hw_rule_div, NULL, 1843 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1844 if (err < 0) 1845 return err; 1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1847 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1848 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1849 if (err < 0) 1850 return err; 1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1852 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1853 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1854 if (err < 0) 1855 return err; 1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1857 snd_pcm_hw_rule_div, NULL, 1858 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1859 if (err < 0) 1860 return err; 1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1862 snd_pcm_hw_rule_div, NULL, 1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1864 if (err < 0) 1865 return err; 1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1867 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1868 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1869 if (err < 0) 1870 return err; 1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1872 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1873 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1874 if (err < 0) 1875 return err; 1876 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1877 snd_pcm_hw_rule_mul, NULL, 1878 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1879 if (err < 0) 1880 return err; 1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1882 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1883 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1884 if (err < 0) 1885 return err; 1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1887 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1888 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1889 if (err < 0) 1890 return err; 1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1892 snd_pcm_hw_rule_muldivk, (void*) 8, 1893 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1894 if (err < 0) 1895 return err; 1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1897 snd_pcm_hw_rule_muldivk, (void*) 8, 1898 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1899 if (err < 0) 1900 return err; 1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1902 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1903 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1904 if (err < 0) 1905 return err; 1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1907 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1908 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1909 if (err < 0) 1910 return err; 1911 return 0; 1912 } 1913 1914 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1915 { 1916 struct snd_pcm_runtime *runtime = substream->runtime; 1917 struct snd_pcm_hardware *hw = &runtime->hw; 1918 int err; 1919 unsigned int mask = 0; 1920 1921 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1922 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1923 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1924 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1925 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1926 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1927 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1928 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1929 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1930 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1931 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1932 } 1933 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1934 snd_assert(err >= 0, return -EINVAL); 1935 1936 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1937 snd_assert(err >= 0, return -EINVAL); 1938 1939 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1940 snd_assert(err >= 0, return -EINVAL); 1941 1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1943 hw->channels_min, hw->channels_max); 1944 snd_assert(err >= 0, return -EINVAL); 1945 1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1947 hw->rate_min, hw->rate_max); 1948 snd_assert(err >= 0, return -EINVAL); 1949 1950 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1951 hw->period_bytes_min, hw->period_bytes_max); 1952 snd_assert(err >= 0, return -EINVAL); 1953 1954 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1955 hw->periods_min, hw->periods_max); 1956 snd_assert(err >= 0, return -EINVAL); 1957 1958 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1959 hw->period_bytes_min, hw->buffer_bytes_max); 1960 snd_assert(err >= 0, return -EINVAL); 1961 1962 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1963 snd_pcm_hw_rule_buffer_bytes_max, substream, 1964 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1965 if (err < 0) 1966 return err; 1967 1968 /* FIXME: remove */ 1969 if (runtime->dma_bytes) { 1970 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1971 snd_assert(err >= 0, return -EINVAL); 1972 } 1973 1974 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1975 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1976 snd_pcm_hw_rule_rate, hw, 1977 SNDRV_PCM_HW_PARAM_RATE, -1); 1978 if (err < 0) 1979 return err; 1980 } 1981 1982 /* FIXME: this belong to lowlevel */ 1983 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1984 1985 return 0; 1986 } 1987 1988 static void pcm_release_private(struct snd_pcm_substream *substream) 1989 { 1990 snd_pcm_unlink(substream); 1991 } 1992 1993 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1994 { 1995 substream->ref_count--; 1996 if (substream->ref_count > 0) 1997 return; 1998 1999 snd_pcm_drop(substream); 2000 if (substream->hw_opened) { 2001 if (substream->ops->hw_free != NULL) 2002 substream->ops->hw_free(substream); 2003 substream->ops->close(substream); 2004 substream->hw_opened = 0; 2005 } 2006 if (substream->pcm_release) { 2007 substream->pcm_release(substream); 2008 substream->pcm_release = NULL; 2009 } 2010 snd_pcm_detach_substream(substream); 2011 } 2012 2013 EXPORT_SYMBOL(snd_pcm_release_substream); 2014 2015 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2016 struct file *file, 2017 struct snd_pcm_substream **rsubstream) 2018 { 2019 struct snd_pcm_substream *substream; 2020 int err; 2021 2022 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2023 if (err < 0) 2024 return err; 2025 if (substream->ref_count > 1) { 2026 *rsubstream = substream; 2027 return 0; 2028 } 2029 2030 err = snd_pcm_hw_constraints_init(substream); 2031 if (err < 0) { 2032 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2033 goto error; 2034 } 2035 2036 if ((err = substream->ops->open(substream)) < 0) 2037 goto error; 2038 2039 substream->hw_opened = 1; 2040 2041 err = snd_pcm_hw_constraints_complete(substream); 2042 if (err < 0) { 2043 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2044 goto error; 2045 } 2046 2047 *rsubstream = substream; 2048 return 0; 2049 2050 error: 2051 snd_pcm_release_substream(substream); 2052 return err; 2053 } 2054 2055 EXPORT_SYMBOL(snd_pcm_open_substream); 2056 2057 static int snd_pcm_open_file(struct file *file, 2058 struct snd_pcm *pcm, 2059 int stream, 2060 struct snd_pcm_file **rpcm_file) 2061 { 2062 struct snd_pcm_file *pcm_file; 2063 struct snd_pcm_substream *substream; 2064 struct snd_pcm_str *str; 2065 int err; 2066 2067 snd_assert(rpcm_file != NULL, return -EINVAL); 2068 *rpcm_file = NULL; 2069 2070 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2071 if (err < 0) 2072 return err; 2073 2074 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2075 if (pcm_file == NULL) { 2076 snd_pcm_release_substream(substream); 2077 return -ENOMEM; 2078 } 2079 pcm_file->substream = substream; 2080 if (substream->ref_count == 1) { 2081 str = substream->pstr; 2082 substream->file = pcm_file; 2083 substream->pcm_release = pcm_release_private; 2084 } 2085 file->private_data = pcm_file; 2086 *rpcm_file = pcm_file; 2087 return 0; 2088 } 2089 2090 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2091 { 2092 struct snd_pcm *pcm; 2093 2094 pcm = snd_lookup_minor_data(iminor(inode), 2095 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2096 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2097 } 2098 2099 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2100 { 2101 struct snd_pcm *pcm; 2102 2103 pcm = snd_lookup_minor_data(iminor(inode), 2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2106 } 2107 2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2109 { 2110 int err; 2111 struct snd_pcm_file *pcm_file; 2112 wait_queue_t wait; 2113 2114 if (pcm == NULL) { 2115 err = -ENODEV; 2116 goto __error1; 2117 } 2118 err = snd_card_file_add(pcm->card, file); 2119 if (err < 0) 2120 goto __error1; 2121 if (!try_module_get(pcm->card->module)) { 2122 err = -EFAULT; 2123 goto __error2; 2124 } 2125 init_waitqueue_entry(&wait, current); 2126 add_wait_queue(&pcm->open_wait, &wait); 2127 mutex_lock(&pcm->open_mutex); 2128 while (1) { 2129 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2130 if (err >= 0) 2131 break; 2132 if (err == -EAGAIN) { 2133 if (file->f_flags & O_NONBLOCK) { 2134 err = -EBUSY; 2135 break; 2136 } 2137 } else 2138 break; 2139 set_current_state(TASK_INTERRUPTIBLE); 2140 mutex_unlock(&pcm->open_mutex); 2141 schedule(); 2142 mutex_lock(&pcm->open_mutex); 2143 if (signal_pending(current)) { 2144 err = -ERESTARTSYS; 2145 break; 2146 } 2147 } 2148 remove_wait_queue(&pcm->open_wait, &wait); 2149 mutex_unlock(&pcm->open_mutex); 2150 if (err < 0) 2151 goto __error; 2152 return err; 2153 2154 __error: 2155 module_put(pcm->card->module); 2156 __error2: 2157 snd_card_file_remove(pcm->card, file); 2158 __error1: 2159 return err; 2160 } 2161 2162 static int snd_pcm_release(struct inode *inode, struct file *file) 2163 { 2164 struct snd_pcm *pcm; 2165 struct snd_pcm_substream *substream; 2166 struct snd_pcm_file *pcm_file; 2167 2168 pcm_file = file->private_data; 2169 substream = pcm_file->substream; 2170 snd_assert(substream != NULL, return -ENXIO); 2171 pcm = substream->pcm; 2172 fasync_helper(-1, file, 0, &substream->runtime->fasync); 2173 mutex_lock(&pcm->open_mutex); 2174 snd_pcm_release_substream(substream); 2175 kfree(pcm_file); 2176 mutex_unlock(&pcm->open_mutex); 2177 wake_up(&pcm->open_wait); 2178 module_put(pcm->card->module); 2179 snd_card_file_remove(pcm->card, file); 2180 return 0; 2181 } 2182 2183 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2184 snd_pcm_uframes_t frames) 2185 { 2186 struct snd_pcm_runtime *runtime = substream->runtime; 2187 snd_pcm_sframes_t appl_ptr; 2188 snd_pcm_sframes_t ret; 2189 snd_pcm_sframes_t hw_avail; 2190 2191 if (frames == 0) 2192 return 0; 2193 2194 snd_pcm_stream_lock_irq(substream); 2195 switch (runtime->status->state) { 2196 case SNDRV_PCM_STATE_PREPARED: 2197 break; 2198 case SNDRV_PCM_STATE_DRAINING: 2199 case SNDRV_PCM_STATE_RUNNING: 2200 if (snd_pcm_update_hw_ptr(substream) >= 0) 2201 break; 2202 /* Fall through */ 2203 case SNDRV_PCM_STATE_XRUN: 2204 ret = -EPIPE; 2205 goto __end; 2206 default: 2207 ret = -EBADFD; 2208 goto __end; 2209 } 2210 2211 hw_avail = snd_pcm_playback_hw_avail(runtime); 2212 if (hw_avail <= 0) { 2213 ret = 0; 2214 goto __end; 2215 } 2216 if (frames > (snd_pcm_uframes_t)hw_avail) 2217 frames = hw_avail; 2218 appl_ptr = runtime->control->appl_ptr - frames; 2219 if (appl_ptr < 0) 2220 appl_ptr += runtime->boundary; 2221 runtime->control->appl_ptr = appl_ptr; 2222 ret = frames; 2223 __end: 2224 snd_pcm_stream_unlock_irq(substream); 2225 return ret; 2226 } 2227 2228 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2229 snd_pcm_uframes_t frames) 2230 { 2231 struct snd_pcm_runtime *runtime = substream->runtime; 2232 snd_pcm_sframes_t appl_ptr; 2233 snd_pcm_sframes_t ret; 2234 snd_pcm_sframes_t hw_avail; 2235 2236 if (frames == 0) 2237 return 0; 2238 2239 snd_pcm_stream_lock_irq(substream); 2240 switch (runtime->status->state) { 2241 case SNDRV_PCM_STATE_PREPARED: 2242 case SNDRV_PCM_STATE_DRAINING: 2243 break; 2244 case SNDRV_PCM_STATE_RUNNING: 2245 if (snd_pcm_update_hw_ptr(substream) >= 0) 2246 break; 2247 /* Fall through */ 2248 case SNDRV_PCM_STATE_XRUN: 2249 ret = -EPIPE; 2250 goto __end; 2251 default: 2252 ret = -EBADFD; 2253 goto __end; 2254 } 2255 2256 hw_avail = snd_pcm_capture_hw_avail(runtime); 2257 if (hw_avail <= 0) { 2258 ret = 0; 2259 goto __end; 2260 } 2261 if (frames > (snd_pcm_uframes_t)hw_avail) 2262 frames = hw_avail; 2263 appl_ptr = runtime->control->appl_ptr - frames; 2264 if (appl_ptr < 0) 2265 appl_ptr += runtime->boundary; 2266 runtime->control->appl_ptr = appl_ptr; 2267 ret = frames; 2268 __end: 2269 snd_pcm_stream_unlock_irq(substream); 2270 return ret; 2271 } 2272 2273 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2274 snd_pcm_uframes_t frames) 2275 { 2276 struct snd_pcm_runtime *runtime = substream->runtime; 2277 snd_pcm_sframes_t appl_ptr; 2278 snd_pcm_sframes_t ret; 2279 snd_pcm_sframes_t avail; 2280 2281 if (frames == 0) 2282 return 0; 2283 2284 snd_pcm_stream_lock_irq(substream); 2285 switch (runtime->status->state) { 2286 case SNDRV_PCM_STATE_PREPARED: 2287 case SNDRV_PCM_STATE_PAUSED: 2288 break; 2289 case SNDRV_PCM_STATE_DRAINING: 2290 case SNDRV_PCM_STATE_RUNNING: 2291 if (snd_pcm_update_hw_ptr(substream) >= 0) 2292 break; 2293 /* Fall through */ 2294 case SNDRV_PCM_STATE_XRUN: 2295 ret = -EPIPE; 2296 goto __end; 2297 default: 2298 ret = -EBADFD; 2299 goto __end; 2300 } 2301 2302 avail = snd_pcm_playback_avail(runtime); 2303 if (avail <= 0) { 2304 ret = 0; 2305 goto __end; 2306 } 2307 if (frames > (snd_pcm_uframes_t)avail) 2308 frames = avail; 2309 appl_ptr = runtime->control->appl_ptr + frames; 2310 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2311 appl_ptr -= runtime->boundary; 2312 runtime->control->appl_ptr = appl_ptr; 2313 ret = frames; 2314 __end: 2315 snd_pcm_stream_unlock_irq(substream); 2316 return ret; 2317 } 2318 2319 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2320 snd_pcm_uframes_t frames) 2321 { 2322 struct snd_pcm_runtime *runtime = substream->runtime; 2323 snd_pcm_sframes_t appl_ptr; 2324 snd_pcm_sframes_t ret; 2325 snd_pcm_sframes_t avail; 2326 2327 if (frames == 0) 2328 return 0; 2329 2330 snd_pcm_stream_lock_irq(substream); 2331 switch (runtime->status->state) { 2332 case SNDRV_PCM_STATE_PREPARED: 2333 case SNDRV_PCM_STATE_DRAINING: 2334 case SNDRV_PCM_STATE_PAUSED: 2335 break; 2336 case SNDRV_PCM_STATE_RUNNING: 2337 if (snd_pcm_update_hw_ptr(substream) >= 0) 2338 break; 2339 /* Fall through */ 2340 case SNDRV_PCM_STATE_XRUN: 2341 ret = -EPIPE; 2342 goto __end; 2343 default: 2344 ret = -EBADFD; 2345 goto __end; 2346 } 2347 2348 avail = snd_pcm_capture_avail(runtime); 2349 if (avail <= 0) { 2350 ret = 0; 2351 goto __end; 2352 } 2353 if (frames > (snd_pcm_uframes_t)avail) 2354 frames = avail; 2355 appl_ptr = runtime->control->appl_ptr + frames; 2356 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2357 appl_ptr -= runtime->boundary; 2358 runtime->control->appl_ptr = appl_ptr; 2359 ret = frames; 2360 __end: 2361 snd_pcm_stream_unlock_irq(substream); 2362 return ret; 2363 } 2364 2365 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2366 { 2367 struct snd_pcm_runtime *runtime = substream->runtime; 2368 int err; 2369 2370 snd_pcm_stream_lock_irq(substream); 2371 switch (runtime->status->state) { 2372 case SNDRV_PCM_STATE_DRAINING: 2373 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2374 goto __badfd; 2375 case SNDRV_PCM_STATE_RUNNING: 2376 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2377 break; 2378 /* Fall through */ 2379 case SNDRV_PCM_STATE_PREPARED: 2380 case SNDRV_PCM_STATE_SUSPENDED: 2381 err = 0; 2382 break; 2383 case SNDRV_PCM_STATE_XRUN: 2384 err = -EPIPE; 2385 break; 2386 default: 2387 __badfd: 2388 err = -EBADFD; 2389 break; 2390 } 2391 snd_pcm_stream_unlock_irq(substream); 2392 return err; 2393 } 2394 2395 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2396 snd_pcm_sframes_t __user *res) 2397 { 2398 struct snd_pcm_runtime *runtime = substream->runtime; 2399 int err; 2400 snd_pcm_sframes_t n = 0; 2401 2402 snd_pcm_stream_lock_irq(substream); 2403 switch (runtime->status->state) { 2404 case SNDRV_PCM_STATE_DRAINING: 2405 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2406 goto __badfd; 2407 case SNDRV_PCM_STATE_RUNNING: 2408 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2409 break; 2410 /* Fall through */ 2411 case SNDRV_PCM_STATE_PREPARED: 2412 case SNDRV_PCM_STATE_SUSPENDED: 2413 err = 0; 2414 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2415 n = snd_pcm_playback_hw_avail(runtime); 2416 else 2417 n = snd_pcm_capture_avail(runtime); 2418 break; 2419 case SNDRV_PCM_STATE_XRUN: 2420 err = -EPIPE; 2421 break; 2422 default: 2423 __badfd: 2424 err = -EBADFD; 2425 break; 2426 } 2427 snd_pcm_stream_unlock_irq(substream); 2428 if (!err) 2429 if (put_user(n, res)) 2430 err = -EFAULT; 2431 return err; 2432 } 2433 2434 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2435 struct snd_pcm_sync_ptr __user *_sync_ptr) 2436 { 2437 struct snd_pcm_runtime *runtime = substream->runtime; 2438 struct snd_pcm_sync_ptr sync_ptr; 2439 volatile struct snd_pcm_mmap_status *status; 2440 volatile struct snd_pcm_mmap_control *control; 2441 int err; 2442 2443 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2444 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2445 return -EFAULT; 2446 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2447 return -EFAULT; 2448 status = runtime->status; 2449 control = runtime->control; 2450 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2451 err = snd_pcm_hwsync(substream); 2452 if (err < 0) 2453 return err; 2454 } 2455 snd_pcm_stream_lock_irq(substream); 2456 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2457 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2458 else 2459 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2460 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2461 control->avail_min = sync_ptr.c.control.avail_min; 2462 else 2463 sync_ptr.c.control.avail_min = control->avail_min; 2464 sync_ptr.s.status.state = status->state; 2465 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2466 sync_ptr.s.status.tstamp = status->tstamp; 2467 sync_ptr.s.status.suspended_state = status->suspended_state; 2468 snd_pcm_stream_unlock_irq(substream); 2469 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2470 return -EFAULT; 2471 return 0; 2472 } 2473 2474 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2475 { 2476 struct snd_pcm_runtime *runtime = substream->runtime; 2477 int arg; 2478 2479 if (get_user(arg, _arg)) 2480 return -EFAULT; 2481 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2482 return -EINVAL; 2483 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2484 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2485 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2486 return 0; 2487 } 2488 2489 static int snd_pcm_common_ioctl1(struct file *file, 2490 struct snd_pcm_substream *substream, 2491 unsigned int cmd, void __user *arg) 2492 { 2493 snd_assert(substream != NULL, return -ENXIO); 2494 2495 switch (cmd) { 2496 case SNDRV_PCM_IOCTL_PVERSION: 2497 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2498 case SNDRV_PCM_IOCTL_INFO: 2499 return snd_pcm_info_user(substream, arg); 2500 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2501 return 0; 2502 case SNDRV_PCM_IOCTL_TTSTAMP: 2503 return snd_pcm_tstamp(substream, arg); 2504 case SNDRV_PCM_IOCTL_HW_REFINE: 2505 return snd_pcm_hw_refine_user(substream, arg); 2506 case SNDRV_PCM_IOCTL_HW_PARAMS: 2507 return snd_pcm_hw_params_user(substream, arg); 2508 case SNDRV_PCM_IOCTL_HW_FREE: 2509 return snd_pcm_hw_free(substream); 2510 case SNDRV_PCM_IOCTL_SW_PARAMS: 2511 return snd_pcm_sw_params_user(substream, arg); 2512 case SNDRV_PCM_IOCTL_STATUS: 2513 return snd_pcm_status_user(substream, arg); 2514 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2515 return snd_pcm_channel_info_user(substream, arg); 2516 case SNDRV_PCM_IOCTL_PREPARE: 2517 return snd_pcm_prepare(substream, file); 2518 case SNDRV_PCM_IOCTL_RESET: 2519 return snd_pcm_reset(substream); 2520 case SNDRV_PCM_IOCTL_START: 2521 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2522 case SNDRV_PCM_IOCTL_LINK: 2523 return snd_pcm_link(substream, (int)(unsigned long) arg); 2524 case SNDRV_PCM_IOCTL_UNLINK: 2525 return snd_pcm_unlink(substream); 2526 case SNDRV_PCM_IOCTL_RESUME: 2527 return snd_pcm_resume(substream); 2528 case SNDRV_PCM_IOCTL_XRUN: 2529 return snd_pcm_xrun(substream); 2530 case SNDRV_PCM_IOCTL_HWSYNC: 2531 return snd_pcm_hwsync(substream); 2532 case SNDRV_PCM_IOCTL_DELAY: 2533 return snd_pcm_delay(substream, arg); 2534 case SNDRV_PCM_IOCTL_SYNC_PTR: 2535 return snd_pcm_sync_ptr(substream, arg); 2536 #ifdef CONFIG_SND_SUPPORT_OLD_API 2537 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2538 return snd_pcm_hw_refine_old_user(substream, arg); 2539 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2540 return snd_pcm_hw_params_old_user(substream, arg); 2541 #endif 2542 case SNDRV_PCM_IOCTL_DRAIN: 2543 return snd_pcm_drain(substream); 2544 case SNDRV_PCM_IOCTL_DROP: 2545 return snd_pcm_drop(substream); 2546 case SNDRV_PCM_IOCTL_PAUSE: 2547 { 2548 int res; 2549 snd_pcm_stream_lock_irq(substream); 2550 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2551 snd_pcm_stream_unlock_irq(substream); 2552 return res; 2553 } 2554 } 2555 snd_printd("unknown ioctl = 0x%x\n", cmd); 2556 return -ENOTTY; 2557 } 2558 2559 static int snd_pcm_playback_ioctl1(struct file *file, 2560 struct snd_pcm_substream *substream, 2561 unsigned int cmd, void __user *arg) 2562 { 2563 snd_assert(substream != NULL, return -ENXIO); 2564 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); 2565 switch (cmd) { 2566 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2567 { 2568 struct snd_xferi xferi; 2569 struct snd_xferi __user *_xferi = arg; 2570 struct snd_pcm_runtime *runtime = substream->runtime; 2571 snd_pcm_sframes_t result; 2572 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2573 return -EBADFD; 2574 if (put_user(0, &_xferi->result)) 2575 return -EFAULT; 2576 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2577 return -EFAULT; 2578 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2579 __put_user(result, &_xferi->result); 2580 return result < 0 ? result : 0; 2581 } 2582 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2583 { 2584 struct snd_xfern xfern; 2585 struct snd_xfern __user *_xfern = arg; 2586 struct snd_pcm_runtime *runtime = substream->runtime; 2587 void __user **bufs; 2588 snd_pcm_sframes_t result; 2589 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2590 return -EBADFD; 2591 if (runtime->channels > 128) 2592 return -EINVAL; 2593 if (put_user(0, &_xfern->result)) 2594 return -EFAULT; 2595 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2596 return -EFAULT; 2597 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2598 if (bufs == NULL) 2599 return -ENOMEM; 2600 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2601 kfree(bufs); 2602 return -EFAULT; 2603 } 2604 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2605 kfree(bufs); 2606 __put_user(result, &_xfern->result); 2607 return result < 0 ? result : 0; 2608 } 2609 case SNDRV_PCM_IOCTL_REWIND: 2610 { 2611 snd_pcm_uframes_t frames; 2612 snd_pcm_uframes_t __user *_frames = arg; 2613 snd_pcm_sframes_t result; 2614 if (get_user(frames, _frames)) 2615 return -EFAULT; 2616 if (put_user(0, _frames)) 2617 return -EFAULT; 2618 result = snd_pcm_playback_rewind(substream, frames); 2619 __put_user(result, _frames); 2620 return result < 0 ? result : 0; 2621 } 2622 case SNDRV_PCM_IOCTL_FORWARD: 2623 { 2624 snd_pcm_uframes_t frames; 2625 snd_pcm_uframes_t __user *_frames = arg; 2626 snd_pcm_sframes_t result; 2627 if (get_user(frames, _frames)) 2628 return -EFAULT; 2629 if (put_user(0, _frames)) 2630 return -EFAULT; 2631 result = snd_pcm_playback_forward(substream, frames); 2632 __put_user(result, _frames); 2633 return result < 0 ? result : 0; 2634 } 2635 } 2636 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2637 } 2638 2639 static int snd_pcm_capture_ioctl1(struct file *file, 2640 struct snd_pcm_substream *substream, 2641 unsigned int cmd, void __user *arg) 2642 { 2643 snd_assert(substream != NULL, return -ENXIO); 2644 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); 2645 switch (cmd) { 2646 case SNDRV_PCM_IOCTL_READI_FRAMES: 2647 { 2648 struct snd_xferi xferi; 2649 struct snd_xferi __user *_xferi = arg; 2650 struct snd_pcm_runtime *runtime = substream->runtime; 2651 snd_pcm_sframes_t result; 2652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2653 return -EBADFD; 2654 if (put_user(0, &_xferi->result)) 2655 return -EFAULT; 2656 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2657 return -EFAULT; 2658 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2659 __put_user(result, &_xferi->result); 2660 return result < 0 ? result : 0; 2661 } 2662 case SNDRV_PCM_IOCTL_READN_FRAMES: 2663 { 2664 struct snd_xfern xfern; 2665 struct snd_xfern __user *_xfern = arg; 2666 struct snd_pcm_runtime *runtime = substream->runtime; 2667 void *bufs; 2668 snd_pcm_sframes_t result; 2669 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2670 return -EBADFD; 2671 if (runtime->channels > 128) 2672 return -EINVAL; 2673 if (put_user(0, &_xfern->result)) 2674 return -EFAULT; 2675 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2676 return -EFAULT; 2677 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2678 if (bufs == NULL) 2679 return -ENOMEM; 2680 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2681 kfree(bufs); 2682 return -EFAULT; 2683 } 2684 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2685 kfree(bufs); 2686 __put_user(result, &_xfern->result); 2687 return result < 0 ? result : 0; 2688 } 2689 case SNDRV_PCM_IOCTL_REWIND: 2690 { 2691 snd_pcm_uframes_t frames; 2692 snd_pcm_uframes_t __user *_frames = arg; 2693 snd_pcm_sframes_t result; 2694 if (get_user(frames, _frames)) 2695 return -EFAULT; 2696 if (put_user(0, _frames)) 2697 return -EFAULT; 2698 result = snd_pcm_capture_rewind(substream, frames); 2699 __put_user(result, _frames); 2700 return result < 0 ? result : 0; 2701 } 2702 case SNDRV_PCM_IOCTL_FORWARD: 2703 { 2704 snd_pcm_uframes_t frames; 2705 snd_pcm_uframes_t __user *_frames = arg; 2706 snd_pcm_sframes_t result; 2707 if (get_user(frames, _frames)) 2708 return -EFAULT; 2709 if (put_user(0, _frames)) 2710 return -EFAULT; 2711 result = snd_pcm_capture_forward(substream, frames); 2712 __put_user(result, _frames); 2713 return result < 0 ? result : 0; 2714 } 2715 } 2716 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2717 } 2718 2719 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2720 unsigned long arg) 2721 { 2722 struct snd_pcm_file *pcm_file; 2723 2724 pcm_file = file->private_data; 2725 2726 if (((cmd >> 8) & 0xff) != 'A') 2727 return -ENOTTY; 2728 2729 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2730 (void __user *)arg); 2731 } 2732 2733 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2734 unsigned long arg) 2735 { 2736 struct snd_pcm_file *pcm_file; 2737 2738 pcm_file = file->private_data; 2739 2740 if (((cmd >> 8) & 0xff) != 'A') 2741 return -ENOTTY; 2742 2743 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2744 (void __user *)arg); 2745 } 2746 2747 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2748 unsigned int cmd, void *arg) 2749 { 2750 mm_segment_t fs; 2751 int result; 2752 2753 fs = snd_enter_user(); 2754 switch (substream->stream) { 2755 case SNDRV_PCM_STREAM_PLAYBACK: 2756 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2757 (void __user *)arg); 2758 break; 2759 case SNDRV_PCM_STREAM_CAPTURE: 2760 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2761 (void __user *)arg); 2762 break; 2763 default: 2764 result = -EINVAL; 2765 break; 2766 } 2767 snd_leave_user(fs); 2768 return result; 2769 } 2770 2771 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2772 2773 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2774 loff_t * offset) 2775 { 2776 struct snd_pcm_file *pcm_file; 2777 struct snd_pcm_substream *substream; 2778 struct snd_pcm_runtime *runtime; 2779 snd_pcm_sframes_t result; 2780 2781 pcm_file = file->private_data; 2782 substream = pcm_file->substream; 2783 snd_assert(substream != NULL, return -ENXIO); 2784 runtime = substream->runtime; 2785 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2786 return -EBADFD; 2787 if (!frame_aligned(runtime, count)) 2788 return -EINVAL; 2789 count = bytes_to_frames(runtime, count); 2790 result = snd_pcm_lib_read(substream, buf, count); 2791 if (result > 0) 2792 result = frames_to_bytes(runtime, result); 2793 return result; 2794 } 2795 2796 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2797 size_t count, loff_t * offset) 2798 { 2799 struct snd_pcm_file *pcm_file; 2800 struct snd_pcm_substream *substream; 2801 struct snd_pcm_runtime *runtime; 2802 snd_pcm_sframes_t result; 2803 2804 pcm_file = file->private_data; 2805 substream = pcm_file->substream; 2806 snd_assert(substream != NULL, result = -ENXIO; goto end); 2807 runtime = substream->runtime; 2808 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2809 result = -EBADFD; 2810 goto end; 2811 } 2812 if (!frame_aligned(runtime, count)) { 2813 result = -EINVAL; 2814 goto end; 2815 } 2816 count = bytes_to_frames(runtime, count); 2817 result = snd_pcm_lib_write(substream, buf, count); 2818 if (result > 0) 2819 result = frames_to_bytes(runtime, result); 2820 end: 2821 return result; 2822 } 2823 2824 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2825 unsigned long nr_segs, loff_t pos) 2826 2827 { 2828 struct snd_pcm_file *pcm_file; 2829 struct snd_pcm_substream *substream; 2830 struct snd_pcm_runtime *runtime; 2831 snd_pcm_sframes_t result; 2832 unsigned long i; 2833 void __user **bufs; 2834 snd_pcm_uframes_t frames; 2835 2836 pcm_file = iocb->ki_filp->private_data; 2837 substream = pcm_file->substream; 2838 snd_assert(substream != NULL, return -ENXIO); 2839 runtime = substream->runtime; 2840 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2841 return -EBADFD; 2842 if (nr_segs > 1024 || nr_segs != runtime->channels) 2843 return -EINVAL; 2844 if (!frame_aligned(runtime, iov->iov_len)) 2845 return -EINVAL; 2846 frames = bytes_to_samples(runtime, iov->iov_len); 2847 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2848 if (bufs == NULL) 2849 return -ENOMEM; 2850 for (i = 0; i < nr_segs; ++i) 2851 bufs[i] = iov[i].iov_base; 2852 result = snd_pcm_lib_readv(substream, bufs, frames); 2853 if (result > 0) 2854 result = frames_to_bytes(runtime, result); 2855 kfree(bufs); 2856 return result; 2857 } 2858 2859 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2860 unsigned long nr_segs, loff_t pos) 2861 { 2862 struct snd_pcm_file *pcm_file; 2863 struct snd_pcm_substream *substream; 2864 struct snd_pcm_runtime *runtime; 2865 snd_pcm_sframes_t result; 2866 unsigned long i; 2867 void __user **bufs; 2868 snd_pcm_uframes_t frames; 2869 2870 pcm_file = iocb->ki_filp->private_data; 2871 substream = pcm_file->substream; 2872 snd_assert(substream != NULL, result = -ENXIO; goto end); 2873 runtime = substream->runtime; 2874 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2875 result = -EBADFD; 2876 goto end; 2877 } 2878 if (nr_segs > 128 || nr_segs != runtime->channels || 2879 !frame_aligned(runtime, iov->iov_len)) { 2880 result = -EINVAL; 2881 goto end; 2882 } 2883 frames = bytes_to_samples(runtime, iov->iov_len); 2884 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2885 if (bufs == NULL) 2886 return -ENOMEM; 2887 for (i = 0; i < nr_segs; ++i) 2888 bufs[i] = iov[i].iov_base; 2889 result = snd_pcm_lib_writev(substream, bufs, frames); 2890 if (result > 0) 2891 result = frames_to_bytes(runtime, result); 2892 kfree(bufs); 2893 end: 2894 return result; 2895 } 2896 2897 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2898 { 2899 struct snd_pcm_file *pcm_file; 2900 struct snd_pcm_substream *substream; 2901 struct snd_pcm_runtime *runtime; 2902 unsigned int mask; 2903 snd_pcm_uframes_t avail; 2904 2905 pcm_file = file->private_data; 2906 2907 substream = pcm_file->substream; 2908 snd_assert(substream != NULL, return -ENXIO); 2909 runtime = substream->runtime; 2910 2911 poll_wait(file, &runtime->sleep, wait); 2912 2913 snd_pcm_stream_lock_irq(substream); 2914 avail = snd_pcm_playback_avail(runtime); 2915 switch (runtime->status->state) { 2916 case SNDRV_PCM_STATE_RUNNING: 2917 case SNDRV_PCM_STATE_PREPARED: 2918 case SNDRV_PCM_STATE_PAUSED: 2919 if (avail >= runtime->control->avail_min) { 2920 mask = POLLOUT | POLLWRNORM; 2921 break; 2922 } 2923 /* Fall through */ 2924 case SNDRV_PCM_STATE_DRAINING: 2925 mask = 0; 2926 break; 2927 default: 2928 mask = POLLOUT | POLLWRNORM | POLLERR; 2929 break; 2930 } 2931 snd_pcm_stream_unlock_irq(substream); 2932 return mask; 2933 } 2934 2935 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2936 { 2937 struct snd_pcm_file *pcm_file; 2938 struct snd_pcm_substream *substream; 2939 struct snd_pcm_runtime *runtime; 2940 unsigned int mask; 2941 snd_pcm_uframes_t avail; 2942 2943 pcm_file = file->private_data; 2944 2945 substream = pcm_file->substream; 2946 snd_assert(substream != NULL, return -ENXIO); 2947 runtime = substream->runtime; 2948 2949 poll_wait(file, &runtime->sleep, wait); 2950 2951 snd_pcm_stream_lock_irq(substream); 2952 avail = snd_pcm_capture_avail(runtime); 2953 switch (runtime->status->state) { 2954 case SNDRV_PCM_STATE_RUNNING: 2955 case SNDRV_PCM_STATE_PREPARED: 2956 case SNDRV_PCM_STATE_PAUSED: 2957 if (avail >= runtime->control->avail_min) { 2958 mask = POLLIN | POLLRDNORM; 2959 break; 2960 } 2961 mask = 0; 2962 break; 2963 case SNDRV_PCM_STATE_DRAINING: 2964 if (avail > 0) { 2965 mask = POLLIN | POLLRDNORM; 2966 break; 2967 } 2968 /* Fall through */ 2969 default: 2970 mask = POLLIN | POLLRDNORM | POLLERR; 2971 break; 2972 } 2973 snd_pcm_stream_unlock_irq(substream); 2974 return mask; 2975 } 2976 2977 /* 2978 * mmap support 2979 */ 2980 2981 /* 2982 * Only on coherent architectures, we can mmap the status and the control records 2983 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2984 */ 2985 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2986 /* 2987 * mmap status record 2988 */ 2989 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2990 struct vm_fault *vmf) 2991 { 2992 struct snd_pcm_substream *substream = area->vm_private_data; 2993 struct snd_pcm_runtime *runtime; 2994 2995 if (substream == NULL) 2996 return VM_FAULT_SIGBUS; 2997 runtime = substream->runtime; 2998 vmf->page = virt_to_page(runtime->status); 2999 get_page(vmf->page); 3000 return 0; 3001 } 3002 3003 static struct vm_operations_struct snd_pcm_vm_ops_status = 3004 { 3005 .fault = snd_pcm_mmap_status_fault, 3006 }; 3007 3008 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3009 struct vm_area_struct *area) 3010 { 3011 struct snd_pcm_runtime *runtime; 3012 long size; 3013 if (!(area->vm_flags & VM_READ)) 3014 return -EINVAL; 3015 runtime = substream->runtime; 3016 snd_assert(runtime != NULL, return -EAGAIN); 3017 size = area->vm_end - area->vm_start; 3018 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3019 return -EINVAL; 3020 area->vm_ops = &snd_pcm_vm_ops_status; 3021 area->vm_private_data = substream; 3022 area->vm_flags |= VM_RESERVED; 3023 return 0; 3024 } 3025 3026 /* 3027 * mmap control record 3028 */ 3029 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3030 struct vm_fault *vmf) 3031 { 3032 struct snd_pcm_substream *substream = area->vm_private_data; 3033 struct snd_pcm_runtime *runtime; 3034 3035 if (substream == NULL) 3036 return VM_FAULT_SIGBUS; 3037 runtime = substream->runtime; 3038 vmf->page = virt_to_page(runtime->control); 3039 get_page(vmf->page); 3040 return 0; 3041 } 3042 3043 static struct vm_operations_struct snd_pcm_vm_ops_control = 3044 { 3045 .fault = snd_pcm_mmap_control_fault, 3046 }; 3047 3048 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3049 struct vm_area_struct *area) 3050 { 3051 struct snd_pcm_runtime *runtime; 3052 long size; 3053 if (!(area->vm_flags & VM_READ)) 3054 return -EINVAL; 3055 runtime = substream->runtime; 3056 snd_assert(runtime != NULL, return -EAGAIN); 3057 size = area->vm_end - area->vm_start; 3058 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3059 return -EINVAL; 3060 area->vm_ops = &snd_pcm_vm_ops_control; 3061 area->vm_private_data = substream; 3062 area->vm_flags |= VM_RESERVED; 3063 return 0; 3064 } 3065 #else /* ! coherent mmap */ 3066 /* 3067 * don't support mmap for status and control records. 3068 */ 3069 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3070 struct vm_area_struct *area) 3071 { 3072 return -ENXIO; 3073 } 3074 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3075 struct vm_area_struct *area) 3076 { 3077 return -ENXIO; 3078 } 3079 #endif /* coherent mmap */ 3080 3081 /* 3082 * fault callback for mmapping a RAM page 3083 */ 3084 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3085 struct vm_fault *vmf) 3086 { 3087 struct snd_pcm_substream *substream = area->vm_private_data; 3088 struct snd_pcm_runtime *runtime; 3089 unsigned long offset; 3090 struct page * page; 3091 void *vaddr; 3092 size_t dma_bytes; 3093 3094 if (substream == NULL) 3095 return VM_FAULT_SIGBUS; 3096 runtime = substream->runtime; 3097 offset = vmf->pgoff << PAGE_SHIFT; 3098 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3099 if (offset > dma_bytes - PAGE_SIZE) 3100 return VM_FAULT_SIGBUS; 3101 if (substream->ops->page) { 3102 page = substream->ops->page(substream, offset); 3103 if (!page) 3104 return VM_FAULT_SIGBUS; 3105 } else { 3106 vaddr = runtime->dma_area + offset; 3107 page = virt_to_page(vaddr); 3108 } 3109 get_page(page); 3110 vmf->page = page; 3111 return 0; 3112 } 3113 3114 static struct vm_operations_struct snd_pcm_vm_ops_data = 3115 { 3116 .open = snd_pcm_mmap_data_open, 3117 .close = snd_pcm_mmap_data_close, 3118 .fault = snd_pcm_mmap_data_fault, 3119 }; 3120 3121 /* 3122 * mmap the DMA buffer on RAM 3123 */ 3124 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3125 struct vm_area_struct *area) 3126 { 3127 area->vm_ops = &snd_pcm_vm_ops_data; 3128 area->vm_private_data = substream; 3129 area->vm_flags |= VM_RESERVED; 3130 atomic_inc(&substream->mmap_count); 3131 return 0; 3132 } 3133 3134 /* 3135 * mmap the DMA buffer on I/O memory area 3136 */ 3137 #if SNDRV_PCM_INFO_MMAP_IOMEM 3138 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3139 { 3140 .open = snd_pcm_mmap_data_open, 3141 .close = snd_pcm_mmap_data_close, 3142 }; 3143 3144 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3145 struct vm_area_struct *area) 3146 { 3147 long size; 3148 unsigned long offset; 3149 3150 #ifdef pgprot_noncached 3151 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3152 #endif 3153 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3154 area->vm_private_data = substream; 3155 area->vm_flags |= VM_IO; 3156 size = area->vm_end - area->vm_start; 3157 offset = area->vm_pgoff << PAGE_SHIFT; 3158 if (io_remap_pfn_range(area, area->vm_start, 3159 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3160 size, area->vm_page_prot)) 3161 return -EAGAIN; 3162 atomic_inc(&substream->mmap_count); 3163 return 0; 3164 } 3165 3166 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3167 #endif /* SNDRV_PCM_INFO_MMAP */ 3168 3169 /* 3170 * mmap DMA buffer 3171 */ 3172 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3173 struct vm_area_struct *area) 3174 { 3175 struct snd_pcm_runtime *runtime; 3176 long size; 3177 unsigned long offset; 3178 size_t dma_bytes; 3179 3180 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3181 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3182 return -EINVAL; 3183 } else { 3184 if (!(area->vm_flags & VM_READ)) 3185 return -EINVAL; 3186 } 3187 runtime = substream->runtime; 3188 snd_assert(runtime != NULL, return -EAGAIN); 3189 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3190 return -EBADFD; 3191 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3192 return -ENXIO; 3193 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3194 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3195 return -EINVAL; 3196 size = area->vm_end - area->vm_start; 3197 offset = area->vm_pgoff << PAGE_SHIFT; 3198 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3199 if ((size_t)size > dma_bytes) 3200 return -EINVAL; 3201 if (offset > dma_bytes - size) 3202 return -EINVAL; 3203 3204 if (substream->ops->mmap) 3205 return substream->ops->mmap(substream, area); 3206 else 3207 return snd_pcm_default_mmap(substream, area); 3208 } 3209 3210 EXPORT_SYMBOL(snd_pcm_mmap_data); 3211 3212 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3213 { 3214 struct snd_pcm_file * pcm_file; 3215 struct snd_pcm_substream *substream; 3216 unsigned long offset; 3217 3218 pcm_file = file->private_data; 3219 substream = pcm_file->substream; 3220 snd_assert(substream != NULL, return -ENXIO); 3221 3222 offset = area->vm_pgoff << PAGE_SHIFT; 3223 switch (offset) { 3224 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3225 if (pcm_file->no_compat_mmap) 3226 return -ENXIO; 3227 return snd_pcm_mmap_status(substream, file, area); 3228 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3229 if (pcm_file->no_compat_mmap) 3230 return -ENXIO; 3231 return snd_pcm_mmap_control(substream, file, area); 3232 default: 3233 return snd_pcm_mmap_data(substream, file, area); 3234 } 3235 return 0; 3236 } 3237 3238 static int snd_pcm_fasync(int fd, struct file * file, int on) 3239 { 3240 struct snd_pcm_file * pcm_file; 3241 struct snd_pcm_substream *substream; 3242 struct snd_pcm_runtime *runtime; 3243 int err; 3244 3245 pcm_file = file->private_data; 3246 substream = pcm_file->substream; 3247 snd_assert(substream != NULL, return -ENXIO); 3248 runtime = substream->runtime; 3249 3250 err = fasync_helper(fd, file, on, &runtime->fasync); 3251 if (err < 0) 3252 return err; 3253 return 0; 3254 } 3255 3256 /* 3257 * ioctl32 compat 3258 */ 3259 #ifdef CONFIG_COMPAT 3260 #include "pcm_compat.c" 3261 #else 3262 #define snd_pcm_ioctl_compat NULL 3263 #endif 3264 3265 /* 3266 * To be removed helpers to keep binary compatibility 3267 */ 3268 3269 #ifdef CONFIG_SND_SUPPORT_OLD_API 3270 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3271 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3272 3273 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3274 struct snd_pcm_hw_params_old *oparams) 3275 { 3276 unsigned int i; 3277 3278 memset(params, 0, sizeof(*params)); 3279 params->flags = oparams->flags; 3280 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3281 params->masks[i].bits[0] = oparams->masks[i]; 3282 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3283 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3284 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3285 params->info = oparams->info; 3286 params->msbits = oparams->msbits; 3287 params->rate_num = oparams->rate_num; 3288 params->rate_den = oparams->rate_den; 3289 params->fifo_size = oparams->fifo_size; 3290 } 3291 3292 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3293 struct snd_pcm_hw_params *params) 3294 { 3295 unsigned int i; 3296 3297 memset(oparams, 0, sizeof(*oparams)); 3298 oparams->flags = params->flags; 3299 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3300 oparams->masks[i] = params->masks[i].bits[0]; 3301 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3302 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3303 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3304 oparams->info = params->info; 3305 oparams->msbits = params->msbits; 3306 oparams->rate_num = params->rate_num; 3307 oparams->rate_den = params->rate_den; 3308 oparams->fifo_size = params->fifo_size; 3309 } 3310 3311 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3312 struct snd_pcm_hw_params_old __user * _oparams) 3313 { 3314 struct snd_pcm_hw_params *params; 3315 struct snd_pcm_hw_params_old *oparams = NULL; 3316 int err; 3317 3318 params = kmalloc(sizeof(*params), GFP_KERNEL); 3319 if (!params) { 3320 err = -ENOMEM; 3321 goto out; 3322 } 3323 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3324 if (!oparams) { 3325 err = -ENOMEM; 3326 goto out; 3327 } 3328 3329 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3330 err = -EFAULT; 3331 goto out; 3332 } 3333 snd_pcm_hw_convert_from_old_params(params, oparams); 3334 err = snd_pcm_hw_refine(substream, params); 3335 snd_pcm_hw_convert_to_old_params(oparams, params); 3336 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3337 if (!err) 3338 err = -EFAULT; 3339 } 3340 out: 3341 kfree(params); 3342 kfree(oparams); 3343 return err; 3344 } 3345 3346 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3347 struct snd_pcm_hw_params_old __user * _oparams) 3348 { 3349 struct snd_pcm_hw_params *params; 3350 struct snd_pcm_hw_params_old *oparams = NULL; 3351 int err; 3352 3353 params = kmalloc(sizeof(*params), GFP_KERNEL); 3354 if (!params) { 3355 err = -ENOMEM; 3356 goto out; 3357 } 3358 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3359 if (!oparams) { 3360 err = -ENOMEM; 3361 goto out; 3362 } 3363 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3364 err = -EFAULT; 3365 goto out; 3366 } 3367 snd_pcm_hw_convert_from_old_params(params, oparams); 3368 err = snd_pcm_hw_params(substream, params); 3369 snd_pcm_hw_convert_to_old_params(oparams, params); 3370 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3371 if (!err) 3372 err = -EFAULT; 3373 } 3374 out: 3375 kfree(params); 3376 kfree(oparams); 3377 return err; 3378 } 3379 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3380 3381 /* 3382 * Register section 3383 */ 3384 3385 const struct file_operations snd_pcm_f_ops[2] = { 3386 { 3387 .owner = THIS_MODULE, 3388 .write = snd_pcm_write, 3389 .aio_write = snd_pcm_aio_write, 3390 .open = snd_pcm_playback_open, 3391 .release = snd_pcm_release, 3392 .poll = snd_pcm_playback_poll, 3393 .unlocked_ioctl = snd_pcm_playback_ioctl, 3394 .compat_ioctl = snd_pcm_ioctl_compat, 3395 .mmap = snd_pcm_mmap, 3396 .fasync = snd_pcm_fasync, 3397 }, 3398 { 3399 .owner = THIS_MODULE, 3400 .read = snd_pcm_read, 3401 .aio_read = snd_pcm_aio_read, 3402 .open = snd_pcm_capture_open, 3403 .release = snd_pcm_release, 3404 .poll = snd_pcm_capture_poll, 3405 .unlocked_ioctl = snd_pcm_capture_ioctl, 3406 .compat_ioctl = snd_pcm_ioctl_compat, 3407 .mmap = snd_pcm_mmap, 3408 .fasync = snd_pcm_fasync, 3409 } 3410 }; 3411