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 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 586 status->tstamp = runtime->status->tstamp; 587 goto _tstamp_end; 588 } 589 } 590 snd_pcm_gettime(runtime, &status->tstamp); 591 _tstamp_end: 592 status->appl_ptr = runtime->control->appl_ptr; 593 status->hw_ptr = runtime->status->hw_ptr; 594 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 595 status->avail = snd_pcm_playback_avail(runtime); 596 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 597 runtime->status->state == SNDRV_PCM_STATE_DRAINING) 598 status->delay = runtime->buffer_size - status->avail; 599 else 600 status->delay = 0; 601 } else { 602 status->avail = snd_pcm_capture_avail(runtime); 603 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 604 status->delay = status->avail; 605 else 606 status->delay = 0; 607 } 608 status->avail_max = runtime->avail_max; 609 status->overrange = runtime->overrange; 610 runtime->avail_max = 0; 611 runtime->overrange = 0; 612 _end: 613 snd_pcm_stream_unlock_irq(substream); 614 return 0; 615 } 616 617 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 618 struct snd_pcm_status __user * _status) 619 { 620 struct snd_pcm_status status; 621 struct snd_pcm_runtime *runtime; 622 int res; 623 624 snd_assert(substream != NULL, return -ENXIO); 625 runtime = substream->runtime; 626 memset(&status, 0, sizeof(status)); 627 res = snd_pcm_status(substream, &status); 628 if (res < 0) 629 return res; 630 if (copy_to_user(_status, &status, sizeof(status))) 631 return -EFAULT; 632 return 0; 633 } 634 635 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 636 struct snd_pcm_channel_info * info) 637 { 638 struct snd_pcm_runtime *runtime; 639 unsigned int channel; 640 641 snd_assert(substream != NULL, return -ENXIO); 642 channel = info->channel; 643 runtime = substream->runtime; 644 snd_pcm_stream_lock_irq(substream); 645 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 646 snd_pcm_stream_unlock_irq(substream); 647 return -EBADFD; 648 } 649 snd_pcm_stream_unlock_irq(substream); 650 if (channel >= runtime->channels) 651 return -EINVAL; 652 memset(info, 0, sizeof(*info)); 653 info->channel = channel; 654 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 655 } 656 657 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 658 struct snd_pcm_channel_info __user * _info) 659 { 660 struct snd_pcm_channel_info info; 661 int res; 662 663 if (copy_from_user(&info, _info, sizeof(info))) 664 return -EFAULT; 665 res = snd_pcm_channel_info(substream, &info); 666 if (res < 0) 667 return res; 668 if (copy_to_user(_info, &info, sizeof(info))) 669 return -EFAULT; 670 return 0; 671 } 672 673 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 674 { 675 struct snd_pcm_runtime *runtime = substream->runtime; 676 if (runtime->trigger_master == NULL) 677 return; 678 if (runtime->trigger_master == substream) { 679 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 680 } else { 681 snd_pcm_trigger_tstamp(runtime->trigger_master); 682 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 683 } 684 runtime->trigger_master = NULL; 685 } 686 687 struct action_ops { 688 int (*pre_action)(struct snd_pcm_substream *substream, int state); 689 int (*do_action)(struct snd_pcm_substream *substream, int state); 690 void (*undo_action)(struct snd_pcm_substream *substream, int state); 691 void (*post_action)(struct snd_pcm_substream *substream, int state); 692 }; 693 694 /* 695 * this functions is core for handling of linked stream 696 * Note: the stream state might be changed also on failure 697 * Note2: call with calling stream lock + link lock 698 */ 699 static int snd_pcm_action_group(struct action_ops *ops, 700 struct snd_pcm_substream *substream, 701 int state, int do_lock) 702 { 703 struct snd_pcm_substream *s = NULL; 704 struct snd_pcm_substream *s1; 705 int res = 0; 706 707 snd_pcm_group_for_each_entry(s, substream) { 708 if (do_lock && s != substream) 709 spin_lock_nested(&s->self_group.lock, 710 SINGLE_DEPTH_NESTING); 711 res = ops->pre_action(s, state); 712 if (res < 0) 713 goto _unlock; 714 } 715 snd_pcm_group_for_each_entry(s, substream) { 716 res = ops->do_action(s, state); 717 if (res < 0) { 718 if (ops->undo_action) { 719 snd_pcm_group_for_each_entry(s1, substream) { 720 if (s1 == s) /* failed stream */ 721 break; 722 ops->undo_action(s1, state); 723 } 724 } 725 s = NULL; /* unlock all */ 726 goto _unlock; 727 } 728 } 729 snd_pcm_group_for_each_entry(s, substream) { 730 ops->post_action(s, state); 731 } 732 _unlock: 733 if (do_lock) { 734 /* unlock streams */ 735 snd_pcm_group_for_each_entry(s1, substream) { 736 if (s1 != substream) 737 spin_unlock(&s1->self_group.lock); 738 if (s1 == s) /* end */ 739 break; 740 } 741 } 742 return res; 743 } 744 745 /* 746 * Note: call with stream lock 747 */ 748 static int snd_pcm_action_single(struct action_ops *ops, 749 struct snd_pcm_substream *substream, 750 int state) 751 { 752 int res; 753 754 res = ops->pre_action(substream, state); 755 if (res < 0) 756 return res; 757 res = ops->do_action(substream, state); 758 if (res == 0) 759 ops->post_action(substream, state); 760 else if (ops->undo_action) 761 ops->undo_action(substream, state); 762 return res; 763 } 764 765 /* 766 * Note: call with stream lock 767 */ 768 static int snd_pcm_action(struct action_ops *ops, 769 struct snd_pcm_substream *substream, 770 int state) 771 { 772 int res; 773 774 if (snd_pcm_stream_linked(substream)) { 775 if (!spin_trylock(&substream->group->lock)) { 776 spin_unlock(&substream->self_group.lock); 777 spin_lock(&substream->group->lock); 778 spin_lock(&substream->self_group.lock); 779 } 780 res = snd_pcm_action_group(ops, substream, state, 1); 781 spin_unlock(&substream->group->lock); 782 } else { 783 res = snd_pcm_action_single(ops, substream, state); 784 } 785 return res; 786 } 787 788 /* 789 * Note: don't use any locks before 790 */ 791 static int snd_pcm_action_lock_irq(struct action_ops *ops, 792 struct snd_pcm_substream *substream, 793 int state) 794 { 795 int res; 796 797 read_lock_irq(&snd_pcm_link_rwlock); 798 if (snd_pcm_stream_linked(substream)) { 799 spin_lock(&substream->group->lock); 800 spin_lock(&substream->self_group.lock); 801 res = snd_pcm_action_group(ops, substream, state, 1); 802 spin_unlock(&substream->self_group.lock); 803 spin_unlock(&substream->group->lock); 804 } else { 805 spin_lock(&substream->self_group.lock); 806 res = snd_pcm_action_single(ops, substream, state); 807 spin_unlock(&substream->self_group.lock); 808 } 809 read_unlock_irq(&snd_pcm_link_rwlock); 810 return res; 811 } 812 813 /* 814 */ 815 static int snd_pcm_action_nonatomic(struct action_ops *ops, 816 struct snd_pcm_substream *substream, 817 int state) 818 { 819 int res; 820 821 down_read(&snd_pcm_link_rwsem); 822 if (snd_pcm_stream_linked(substream)) 823 res = snd_pcm_action_group(ops, substream, state, 0); 824 else 825 res = snd_pcm_action_single(ops, substream, state); 826 up_read(&snd_pcm_link_rwsem); 827 return res; 828 } 829 830 /* 831 * start callbacks 832 */ 833 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 834 { 835 struct snd_pcm_runtime *runtime = substream->runtime; 836 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 837 return -EBADFD; 838 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 839 !snd_pcm_playback_data(substream)) 840 return -EPIPE; 841 runtime->trigger_master = substream; 842 return 0; 843 } 844 845 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 846 { 847 if (substream->runtime->trigger_master != substream) 848 return 0; 849 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 850 } 851 852 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 853 { 854 if (substream->runtime->trigger_master == substream) 855 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 856 } 857 858 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 859 { 860 struct snd_pcm_runtime *runtime = substream->runtime; 861 snd_pcm_trigger_tstamp(substream); 862 runtime->status->state = state; 863 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 864 runtime->silence_size > 0) 865 snd_pcm_playback_silence(substream, ULONG_MAX); 866 if (substream->timer) 867 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 868 &runtime->trigger_tstamp); 869 } 870 871 static struct action_ops snd_pcm_action_start = { 872 .pre_action = snd_pcm_pre_start, 873 .do_action = snd_pcm_do_start, 874 .undo_action = snd_pcm_undo_start, 875 .post_action = snd_pcm_post_start 876 }; 877 878 /** 879 * snd_pcm_start 880 * @substream: the PCM substream instance 881 * 882 * Start all linked streams. 883 */ 884 int snd_pcm_start(struct snd_pcm_substream *substream) 885 { 886 return snd_pcm_action(&snd_pcm_action_start, substream, 887 SNDRV_PCM_STATE_RUNNING); 888 } 889 890 /* 891 * stop callbacks 892 */ 893 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 894 { 895 struct snd_pcm_runtime *runtime = substream->runtime; 896 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 897 return -EBADFD; 898 runtime->trigger_master = substream; 899 return 0; 900 } 901 902 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 903 { 904 if (substream->runtime->trigger_master == substream && 905 snd_pcm_running(substream)) 906 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 907 return 0; /* unconditonally stop all substreams */ 908 } 909 910 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 911 { 912 struct snd_pcm_runtime *runtime = substream->runtime; 913 if (runtime->status->state != state) { 914 snd_pcm_trigger_tstamp(substream); 915 if (substream->timer) 916 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 917 &runtime->trigger_tstamp); 918 runtime->status->state = state; 919 } 920 wake_up(&runtime->sleep); 921 } 922 923 static struct action_ops snd_pcm_action_stop = { 924 .pre_action = snd_pcm_pre_stop, 925 .do_action = snd_pcm_do_stop, 926 .post_action = snd_pcm_post_stop 927 }; 928 929 /** 930 * snd_pcm_stop 931 * @substream: the PCM substream instance 932 * @state: PCM state after stopping the stream 933 * 934 * Try to stop all running streams in the substream group. 935 * The state of each stream is changed to the given value after that unconditionally. 936 */ 937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 938 { 939 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 940 } 941 942 EXPORT_SYMBOL(snd_pcm_stop); 943 944 /** 945 * snd_pcm_drain_done 946 * @substream: the PCM substream 947 * 948 * Stop the DMA only when the given stream is playback. 949 * The state is changed to SETUP. 950 * Unlike snd_pcm_stop(), this affects only the given stream. 951 */ 952 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 953 { 954 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 955 SNDRV_PCM_STATE_SETUP); 956 } 957 958 /* 959 * pause callbacks 960 */ 961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 962 { 963 struct snd_pcm_runtime *runtime = substream->runtime; 964 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 965 return -ENOSYS; 966 if (push) { 967 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 968 return -EBADFD; 969 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 970 return -EBADFD; 971 runtime->trigger_master = substream; 972 return 0; 973 } 974 975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 976 { 977 if (substream->runtime->trigger_master != substream) 978 return 0; 979 return substream->ops->trigger(substream, 980 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 981 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 982 } 983 984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 985 { 986 if (substream->runtime->trigger_master == substream) 987 substream->ops->trigger(substream, 988 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 989 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 990 } 991 992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 993 { 994 struct snd_pcm_runtime *runtime = substream->runtime; 995 snd_pcm_trigger_tstamp(substream); 996 if (push) { 997 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 998 if (substream->timer) 999 snd_timer_notify(substream->timer, 1000 SNDRV_TIMER_EVENT_MPAUSE, 1001 &runtime->trigger_tstamp); 1002 wake_up(&runtime->sleep); 1003 } else { 1004 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1005 if (substream->timer) 1006 snd_timer_notify(substream->timer, 1007 SNDRV_TIMER_EVENT_MCONTINUE, 1008 &runtime->trigger_tstamp); 1009 } 1010 } 1011 1012 static struct action_ops snd_pcm_action_pause = { 1013 .pre_action = snd_pcm_pre_pause, 1014 .do_action = snd_pcm_do_pause, 1015 .undo_action = snd_pcm_undo_pause, 1016 .post_action = snd_pcm_post_pause 1017 }; 1018 1019 /* 1020 * Push/release the pause for all linked streams. 1021 */ 1022 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1023 { 1024 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1025 } 1026 1027 #ifdef CONFIG_PM 1028 /* suspend */ 1029 1030 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1031 { 1032 struct snd_pcm_runtime *runtime = substream->runtime; 1033 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1034 return -EBUSY; 1035 runtime->trigger_master = substream; 1036 return 0; 1037 } 1038 1039 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1040 { 1041 struct snd_pcm_runtime *runtime = substream->runtime; 1042 if (runtime->trigger_master != substream) 1043 return 0; 1044 if (! snd_pcm_running(substream)) 1045 return 0; 1046 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1047 return 0; /* suspend unconditionally */ 1048 } 1049 1050 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1051 { 1052 struct snd_pcm_runtime *runtime = substream->runtime; 1053 snd_pcm_trigger_tstamp(substream); 1054 if (substream->timer) 1055 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1056 &runtime->trigger_tstamp); 1057 runtime->status->suspended_state = runtime->status->state; 1058 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1059 wake_up(&runtime->sleep); 1060 } 1061 1062 static struct action_ops snd_pcm_action_suspend = { 1063 .pre_action = snd_pcm_pre_suspend, 1064 .do_action = snd_pcm_do_suspend, 1065 .post_action = snd_pcm_post_suspend 1066 }; 1067 1068 /** 1069 * snd_pcm_suspend 1070 * @substream: the PCM substream 1071 * 1072 * Trigger SUSPEND to all linked streams. 1073 * After this call, all streams are changed to SUSPENDED state. 1074 */ 1075 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1076 { 1077 int err; 1078 unsigned long flags; 1079 1080 if (! substream) 1081 return 0; 1082 1083 snd_pcm_stream_lock_irqsave(substream, flags); 1084 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1085 snd_pcm_stream_unlock_irqrestore(substream, flags); 1086 return err; 1087 } 1088 1089 EXPORT_SYMBOL(snd_pcm_suspend); 1090 1091 /** 1092 * snd_pcm_suspend_all 1093 * @pcm: the PCM instance 1094 * 1095 * Trigger SUSPEND to all substreams in the given pcm. 1096 * After this call, all streams are changed to SUSPENDED state. 1097 */ 1098 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1099 { 1100 struct snd_pcm_substream *substream; 1101 int stream, err = 0; 1102 1103 if (! pcm) 1104 return 0; 1105 1106 for (stream = 0; stream < 2; stream++) { 1107 for (substream = pcm->streams[stream].substream; 1108 substream; substream = substream->next) { 1109 /* FIXME: the open/close code should lock this as well */ 1110 if (substream->runtime == NULL) 1111 continue; 1112 err = snd_pcm_suspend(substream); 1113 if (err < 0 && err != -EBUSY) 1114 return err; 1115 } 1116 } 1117 return 0; 1118 } 1119 1120 EXPORT_SYMBOL(snd_pcm_suspend_all); 1121 1122 /* resume */ 1123 1124 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1125 { 1126 struct snd_pcm_runtime *runtime = substream->runtime; 1127 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1128 return -ENOSYS; 1129 runtime->trigger_master = substream; 1130 return 0; 1131 } 1132 1133 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1134 { 1135 struct snd_pcm_runtime *runtime = substream->runtime; 1136 if (runtime->trigger_master != substream) 1137 return 0; 1138 /* DMA not running previously? */ 1139 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1140 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1141 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1142 return 0; 1143 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1144 } 1145 1146 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1147 { 1148 if (substream->runtime->trigger_master == substream && 1149 snd_pcm_running(substream)) 1150 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1151 } 1152 1153 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1154 { 1155 struct snd_pcm_runtime *runtime = substream->runtime; 1156 snd_pcm_trigger_tstamp(substream); 1157 if (substream->timer) 1158 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1159 &runtime->trigger_tstamp); 1160 runtime->status->state = runtime->status->suspended_state; 1161 } 1162 1163 static struct action_ops snd_pcm_action_resume = { 1164 .pre_action = snd_pcm_pre_resume, 1165 .do_action = snd_pcm_do_resume, 1166 .undo_action = snd_pcm_undo_resume, 1167 .post_action = snd_pcm_post_resume 1168 }; 1169 1170 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1171 { 1172 struct snd_card *card = substream->pcm->card; 1173 int res; 1174 1175 snd_power_lock(card); 1176 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1177 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1178 snd_power_unlock(card); 1179 return res; 1180 } 1181 1182 #else 1183 1184 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1185 { 1186 return -ENOSYS; 1187 } 1188 1189 #endif /* CONFIG_PM */ 1190 1191 /* 1192 * xrun ioctl 1193 * 1194 * Change the RUNNING stream(s) to XRUN state. 1195 */ 1196 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1197 { 1198 struct snd_card *card = substream->pcm->card; 1199 struct snd_pcm_runtime *runtime = substream->runtime; 1200 int result; 1201 1202 snd_power_lock(card); 1203 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1204 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1205 if (result < 0) 1206 goto _unlock; 1207 } 1208 1209 snd_pcm_stream_lock_irq(substream); 1210 switch (runtime->status->state) { 1211 case SNDRV_PCM_STATE_XRUN: 1212 result = 0; /* already there */ 1213 break; 1214 case SNDRV_PCM_STATE_RUNNING: 1215 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1216 break; 1217 default: 1218 result = -EBADFD; 1219 } 1220 snd_pcm_stream_unlock_irq(substream); 1221 _unlock: 1222 snd_power_unlock(card); 1223 return result; 1224 } 1225 1226 /* 1227 * reset ioctl 1228 */ 1229 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1230 { 1231 struct snd_pcm_runtime *runtime = substream->runtime; 1232 switch (runtime->status->state) { 1233 case SNDRV_PCM_STATE_RUNNING: 1234 case SNDRV_PCM_STATE_PREPARED: 1235 case SNDRV_PCM_STATE_PAUSED: 1236 case SNDRV_PCM_STATE_SUSPENDED: 1237 return 0; 1238 default: 1239 return -EBADFD; 1240 } 1241 } 1242 1243 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1244 { 1245 struct snd_pcm_runtime *runtime = substream->runtime; 1246 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1247 if (err < 0) 1248 return err; 1249 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); 1250 runtime->hw_ptr_base = 0; 1251 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1252 runtime->status->hw_ptr % runtime->period_size; 1253 runtime->silence_start = runtime->status->hw_ptr; 1254 runtime->silence_filled = 0; 1255 return 0; 1256 } 1257 1258 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 runtime->control->appl_ptr = runtime->status->hw_ptr; 1262 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1263 runtime->silence_size > 0) 1264 snd_pcm_playback_silence(substream, ULONG_MAX); 1265 } 1266 1267 static struct action_ops snd_pcm_action_reset = { 1268 .pre_action = snd_pcm_pre_reset, 1269 .do_action = snd_pcm_do_reset, 1270 .post_action = snd_pcm_post_reset 1271 }; 1272 1273 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1274 { 1275 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1276 } 1277 1278 /* 1279 * prepare ioctl 1280 */ 1281 /* we use the second argument for updating f_flags */ 1282 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1283 int f_flags) 1284 { 1285 struct snd_pcm_runtime *runtime = substream->runtime; 1286 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1287 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1288 return -EBADFD; 1289 if (snd_pcm_running(substream)) 1290 return -EBUSY; 1291 substream->f_flags = f_flags; 1292 return 0; 1293 } 1294 1295 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1296 { 1297 int err; 1298 err = substream->ops->prepare(substream); 1299 if (err < 0) 1300 return err; 1301 return snd_pcm_do_reset(substream, 0); 1302 } 1303 1304 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1305 { 1306 struct snd_pcm_runtime *runtime = substream->runtime; 1307 runtime->control->appl_ptr = runtime->status->hw_ptr; 1308 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1309 } 1310 1311 static struct action_ops snd_pcm_action_prepare = { 1312 .pre_action = snd_pcm_pre_prepare, 1313 .do_action = snd_pcm_do_prepare, 1314 .post_action = snd_pcm_post_prepare 1315 }; 1316 1317 /** 1318 * snd_pcm_prepare 1319 * @substream: the PCM substream instance 1320 * @file: file to refer f_flags 1321 * 1322 * Prepare the PCM substream to be triggerable. 1323 */ 1324 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1325 struct file *file) 1326 { 1327 int res; 1328 struct snd_card *card = substream->pcm->card; 1329 int f_flags; 1330 1331 if (file) 1332 f_flags = file->f_flags; 1333 else 1334 f_flags = substream->f_flags; 1335 1336 snd_power_lock(card); 1337 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1338 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1339 substream, f_flags); 1340 snd_power_unlock(card); 1341 return res; 1342 } 1343 1344 /* 1345 * drain ioctl 1346 */ 1347 1348 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1349 { 1350 if (substream->f_flags & O_NONBLOCK) 1351 return -EAGAIN; 1352 substream->runtime->trigger_master = substream; 1353 return 0; 1354 } 1355 1356 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1357 { 1358 struct snd_pcm_runtime *runtime = substream->runtime; 1359 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1360 switch (runtime->status->state) { 1361 case SNDRV_PCM_STATE_PREPARED: 1362 /* start playback stream if possible */ 1363 if (! snd_pcm_playback_empty(substream)) { 1364 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1365 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1366 } 1367 break; 1368 case SNDRV_PCM_STATE_RUNNING: 1369 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1370 break; 1371 default: 1372 break; 1373 } 1374 } else { 1375 /* stop running stream */ 1376 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1377 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1378 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1379 snd_pcm_do_stop(substream, new_state); 1380 snd_pcm_post_stop(substream, new_state); 1381 } 1382 } 1383 return 0; 1384 } 1385 1386 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1387 { 1388 } 1389 1390 static struct action_ops snd_pcm_action_drain_init = { 1391 .pre_action = snd_pcm_pre_drain_init, 1392 .do_action = snd_pcm_do_drain_init, 1393 .post_action = snd_pcm_post_drain_init 1394 }; 1395 1396 struct drain_rec { 1397 struct snd_pcm_substream *substream; 1398 wait_queue_t wait; 1399 snd_pcm_uframes_t stop_threshold; 1400 }; 1401 1402 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1403 1404 /* 1405 * Drain the stream(s). 1406 * When the substream is linked, sync until the draining of all playback streams 1407 * is finished. 1408 * After this call, all streams are supposed to be either SETUP or DRAINING 1409 * (capture only) state. 1410 */ 1411 static int snd_pcm_drain(struct snd_pcm_substream *substream) 1412 { 1413 struct snd_card *card; 1414 struct snd_pcm_runtime *runtime; 1415 struct snd_pcm_substream *s; 1416 int result = 0; 1417 int i, num_drecs; 1418 struct drain_rec *drec, drec_tmp, *d; 1419 1420 snd_assert(substream != NULL, return -ENXIO); 1421 card = substream->pcm->card; 1422 runtime = substream->runtime; 1423 1424 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1425 return -EBADFD; 1426 1427 snd_power_lock(card); 1428 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1429 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1430 if (result < 0) { 1431 snd_power_unlock(card); 1432 return result; 1433 } 1434 } 1435 1436 /* allocate temporary record for drain sync */ 1437 down_read(&snd_pcm_link_rwsem); 1438 if (snd_pcm_stream_linked(substream)) { 1439 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); 1440 if (! drec) { 1441 up_read(&snd_pcm_link_rwsem); 1442 snd_power_unlock(card); 1443 return -ENOMEM; 1444 } 1445 } else 1446 drec = &drec_tmp; 1447 1448 /* count only playback streams */ 1449 num_drecs = 0; 1450 snd_pcm_group_for_each_entry(s, substream) { 1451 runtime = s->runtime; 1452 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1453 d = &drec[num_drecs++]; 1454 d->substream = s; 1455 init_waitqueue_entry(&d->wait, current); 1456 add_wait_queue(&runtime->sleep, &d->wait); 1457 /* stop_threshold fixup to avoid endless loop when 1458 * stop_threshold > buffer_size 1459 */ 1460 d->stop_threshold = runtime->stop_threshold; 1461 if (runtime->stop_threshold > runtime->buffer_size) 1462 runtime->stop_threshold = runtime->buffer_size; 1463 } 1464 } 1465 up_read(&snd_pcm_link_rwsem); 1466 1467 snd_pcm_stream_lock_irq(substream); 1468 /* resume pause */ 1469 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1470 snd_pcm_pause(substream, 0); 1471 1472 /* pre-start/stop - all running streams are changed to DRAINING state */ 1473 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1474 if (result < 0) { 1475 snd_pcm_stream_unlock_irq(substream); 1476 goto _error; 1477 } 1478 1479 for (;;) { 1480 long tout; 1481 if (signal_pending(current)) { 1482 result = -ERESTARTSYS; 1483 break; 1484 } 1485 /* all finished? */ 1486 for (i = 0; i < num_drecs; i++) { 1487 runtime = drec[i].substream->runtime; 1488 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) 1489 break; 1490 } 1491 if (i == num_drecs) 1492 break; /* yes, all drained */ 1493 1494 set_current_state(TASK_INTERRUPTIBLE); 1495 snd_pcm_stream_unlock_irq(substream); 1496 snd_power_unlock(card); 1497 tout = schedule_timeout(10 * HZ); 1498 snd_power_lock(card); 1499 snd_pcm_stream_lock_irq(substream); 1500 if (tout == 0) { 1501 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1502 result = -ESTRPIPE; 1503 else { 1504 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1505 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1506 result = -EIO; 1507 } 1508 break; 1509 } 1510 } 1511 1512 snd_pcm_stream_unlock_irq(substream); 1513 1514 _error: 1515 for (i = 0; i < num_drecs; i++) { 1516 d = &drec[i]; 1517 runtime = d->substream->runtime; 1518 remove_wait_queue(&runtime->sleep, &d->wait); 1519 runtime->stop_threshold = d->stop_threshold; 1520 } 1521 1522 if (drec != &drec_tmp) 1523 kfree(drec); 1524 snd_power_unlock(card); 1525 1526 return result; 1527 } 1528 1529 /* 1530 * drop ioctl 1531 * 1532 * Immediately put all linked substreams into SETUP state. 1533 */ 1534 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1535 { 1536 struct snd_pcm_runtime *runtime; 1537 struct snd_card *card; 1538 int result = 0; 1539 1540 snd_assert(substream != NULL, return -ENXIO); 1541 runtime = substream->runtime; 1542 card = substream->pcm->card; 1543 1544 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1545 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1546 return -EBADFD; 1547 1548 snd_power_lock(card); 1549 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1550 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1551 if (result < 0) 1552 goto _unlock; 1553 } 1554 1555 snd_pcm_stream_lock_irq(substream); 1556 /* resume pause */ 1557 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1558 snd_pcm_pause(substream, 0); 1559 1560 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1561 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1562 snd_pcm_stream_unlock_irq(substream); 1563 _unlock: 1564 snd_power_unlock(card); 1565 return result; 1566 } 1567 1568 1569 /* WARNING: Don't forget to fput back the file */ 1570 static struct file *snd_pcm_file_fd(int fd) 1571 { 1572 struct file *file; 1573 struct inode *inode; 1574 unsigned int minor; 1575 1576 file = fget(fd); 1577 if (!file) 1578 return NULL; 1579 inode = file->f_path.dentry->d_inode; 1580 if (!S_ISCHR(inode->i_mode) || 1581 imajor(inode) != snd_major) { 1582 fput(file); 1583 return NULL; 1584 } 1585 minor = iminor(inode); 1586 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1587 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1588 fput(file); 1589 return NULL; 1590 } 1591 return file; 1592 } 1593 1594 /* 1595 * PCM link handling 1596 */ 1597 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1598 { 1599 int res = 0; 1600 struct file *file; 1601 struct snd_pcm_file *pcm_file; 1602 struct snd_pcm_substream *substream1; 1603 1604 file = snd_pcm_file_fd(fd); 1605 if (!file) 1606 return -EBADFD; 1607 pcm_file = file->private_data; 1608 substream1 = pcm_file->substream; 1609 down_write(&snd_pcm_link_rwsem); 1610 write_lock_irq(&snd_pcm_link_rwlock); 1611 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1612 substream->runtime->status->state != substream1->runtime->status->state) { 1613 res = -EBADFD; 1614 goto _end; 1615 } 1616 if (snd_pcm_stream_linked(substream1)) { 1617 res = -EALREADY; 1618 goto _end; 1619 } 1620 if (!snd_pcm_stream_linked(substream)) { 1621 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1622 if (substream->group == NULL) { 1623 res = -ENOMEM; 1624 goto _end; 1625 } 1626 spin_lock_init(&substream->group->lock); 1627 INIT_LIST_HEAD(&substream->group->substreams); 1628 list_add_tail(&substream->link_list, &substream->group->substreams); 1629 substream->group->count = 1; 1630 } 1631 list_add_tail(&substream1->link_list, &substream->group->substreams); 1632 substream->group->count++; 1633 substream1->group = substream->group; 1634 _end: 1635 write_unlock_irq(&snd_pcm_link_rwlock); 1636 up_write(&snd_pcm_link_rwsem); 1637 fput(file); 1638 return res; 1639 } 1640 1641 static void relink_to_local(struct snd_pcm_substream *substream) 1642 { 1643 substream->group = &substream->self_group; 1644 INIT_LIST_HEAD(&substream->self_group.substreams); 1645 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1646 } 1647 1648 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1649 { 1650 struct snd_pcm_substream *s; 1651 int res = 0; 1652 1653 down_write(&snd_pcm_link_rwsem); 1654 write_lock_irq(&snd_pcm_link_rwlock); 1655 if (!snd_pcm_stream_linked(substream)) { 1656 res = -EALREADY; 1657 goto _end; 1658 } 1659 list_del(&substream->link_list); 1660 substream->group->count--; 1661 if (substream->group->count == 1) { /* detach the last stream, too */ 1662 snd_pcm_group_for_each_entry(s, substream) { 1663 relink_to_local(s); 1664 break; 1665 } 1666 kfree(substream->group); 1667 } 1668 relink_to_local(substream); 1669 _end: 1670 write_unlock_irq(&snd_pcm_link_rwlock); 1671 up_write(&snd_pcm_link_rwsem); 1672 return res; 1673 } 1674 1675 /* 1676 * hw configurator 1677 */ 1678 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1679 struct snd_pcm_hw_rule *rule) 1680 { 1681 struct snd_interval t; 1682 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1683 hw_param_interval_c(params, rule->deps[1]), &t); 1684 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1685 } 1686 1687 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1688 struct snd_pcm_hw_rule *rule) 1689 { 1690 struct snd_interval t; 1691 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1692 hw_param_interval_c(params, rule->deps[1]), &t); 1693 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1694 } 1695 1696 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1697 struct snd_pcm_hw_rule *rule) 1698 { 1699 struct snd_interval t; 1700 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1701 hw_param_interval_c(params, rule->deps[1]), 1702 (unsigned long) rule->private, &t); 1703 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1704 } 1705 1706 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1707 struct snd_pcm_hw_rule *rule) 1708 { 1709 struct snd_interval t; 1710 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1711 (unsigned long) rule->private, 1712 hw_param_interval_c(params, rule->deps[1]), &t); 1713 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1714 } 1715 1716 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1717 struct snd_pcm_hw_rule *rule) 1718 { 1719 unsigned int k; 1720 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1721 struct snd_mask m; 1722 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1723 snd_mask_any(&m); 1724 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1725 int bits; 1726 if (! snd_mask_test(mask, k)) 1727 continue; 1728 bits = snd_pcm_format_physical_width(k); 1729 if (bits <= 0) 1730 continue; /* ignore invalid formats */ 1731 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1732 snd_mask_reset(&m, k); 1733 } 1734 return snd_mask_refine(mask, &m); 1735 } 1736 1737 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1738 struct snd_pcm_hw_rule *rule) 1739 { 1740 struct snd_interval t; 1741 unsigned int k; 1742 t.min = UINT_MAX; 1743 t.max = 0; 1744 t.openmin = 0; 1745 t.openmax = 0; 1746 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1747 int bits; 1748 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1749 continue; 1750 bits = snd_pcm_format_physical_width(k); 1751 if (bits <= 0) 1752 continue; /* ignore invalid formats */ 1753 if (t.min > (unsigned)bits) 1754 t.min = bits; 1755 if (t.max < (unsigned)bits) 1756 t.max = bits; 1757 } 1758 t.integer = 1; 1759 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1760 } 1761 1762 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1763 #error "Change this table" 1764 #endif 1765 1766 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1767 48000, 64000, 88200, 96000, 176400, 192000 }; 1768 1769 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1770 .count = ARRAY_SIZE(rates), 1771 .list = rates, 1772 }; 1773 1774 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1775 struct snd_pcm_hw_rule *rule) 1776 { 1777 struct snd_pcm_hardware *hw = rule->private; 1778 return snd_interval_list(hw_param_interval(params, rule->var), 1779 snd_pcm_known_rates.count, 1780 snd_pcm_known_rates.list, hw->rates); 1781 } 1782 1783 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1784 struct snd_pcm_hw_rule *rule) 1785 { 1786 struct snd_interval t; 1787 struct snd_pcm_substream *substream = rule->private; 1788 t.min = 0; 1789 t.max = substream->buffer_bytes_max; 1790 t.openmin = 0; 1791 t.openmax = 0; 1792 t.integer = 1; 1793 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1794 } 1795 1796 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1797 { 1798 struct snd_pcm_runtime *runtime = substream->runtime; 1799 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1800 int k, err; 1801 1802 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1803 snd_mask_any(constrs_mask(constrs, k)); 1804 } 1805 1806 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1807 snd_interval_any(constrs_interval(constrs, k)); 1808 } 1809 1810 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1815 1816 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1817 snd_pcm_hw_rule_format, NULL, 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_sample_bits, NULL, 1823 SNDRV_PCM_HW_PARAM_FORMAT, 1824 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1828 snd_pcm_hw_rule_div, NULL, 1829 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1830 if (err < 0) 1831 return err; 1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1833 snd_pcm_hw_rule_mul, NULL, 1834 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1835 if (err < 0) 1836 return err; 1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1838 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1839 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1840 if (err < 0) 1841 return err; 1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1843 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1844 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1845 if (err < 0) 1846 return err; 1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1848 snd_pcm_hw_rule_div, NULL, 1849 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1850 if (err < 0) 1851 return err; 1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1853 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1854 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1855 if (err < 0) 1856 return err; 1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1858 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1859 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1860 if (err < 0) 1861 return err; 1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1863 snd_pcm_hw_rule_div, NULL, 1864 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1865 if (err < 0) 1866 return err; 1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1868 snd_pcm_hw_rule_div, NULL, 1869 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1870 if (err < 0) 1871 return err; 1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1873 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1874 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1875 if (err < 0) 1876 return err; 1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1878 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1879 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1880 if (err < 0) 1881 return err; 1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1883 snd_pcm_hw_rule_mul, NULL, 1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1885 if (err < 0) 1886 return err; 1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1888 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1889 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1890 if (err < 0) 1891 return err; 1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1893 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1894 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1895 if (err < 0) 1896 return err; 1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1898 snd_pcm_hw_rule_muldivk, (void*) 8, 1899 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1900 if (err < 0) 1901 return err; 1902 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1903 snd_pcm_hw_rule_muldivk, (void*) 8, 1904 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1905 if (err < 0) 1906 return err; 1907 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1908 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1909 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1910 if (err < 0) 1911 return err; 1912 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1913 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1914 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1915 if (err < 0) 1916 return err; 1917 return 0; 1918 } 1919 1920 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1921 { 1922 struct snd_pcm_runtime *runtime = substream->runtime; 1923 struct snd_pcm_hardware *hw = &runtime->hw; 1924 int err; 1925 unsigned int mask = 0; 1926 1927 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1928 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1929 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1930 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1931 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1932 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1933 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1934 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1935 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1936 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1938 } 1939 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1940 snd_assert(err >= 0, return -EINVAL); 1941 1942 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1943 snd_assert(err >= 0, return -EINVAL); 1944 1945 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1946 snd_assert(err >= 0, return -EINVAL); 1947 1948 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1949 hw->channels_min, hw->channels_max); 1950 snd_assert(err >= 0, return -EINVAL); 1951 1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1953 hw->rate_min, hw->rate_max); 1954 snd_assert(err >= 0, return -EINVAL); 1955 1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1957 hw->period_bytes_min, hw->period_bytes_max); 1958 snd_assert(err >= 0, return -EINVAL); 1959 1960 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1961 hw->periods_min, hw->periods_max); 1962 snd_assert(err >= 0, return -EINVAL); 1963 1964 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1965 hw->period_bytes_min, hw->buffer_bytes_max); 1966 snd_assert(err >= 0, return -EINVAL); 1967 1968 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1969 snd_pcm_hw_rule_buffer_bytes_max, substream, 1970 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1971 if (err < 0) 1972 return err; 1973 1974 /* FIXME: remove */ 1975 if (runtime->dma_bytes) { 1976 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1977 snd_assert(err >= 0, return -EINVAL); 1978 } 1979 1980 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1981 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1982 snd_pcm_hw_rule_rate, hw, 1983 SNDRV_PCM_HW_PARAM_RATE, -1); 1984 if (err < 0) 1985 return err; 1986 } 1987 1988 /* FIXME: this belong to lowlevel */ 1989 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1990 1991 return 0; 1992 } 1993 1994 static void pcm_release_private(struct snd_pcm_substream *substream) 1995 { 1996 snd_pcm_unlink(substream); 1997 } 1998 1999 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2000 { 2001 substream->ref_count--; 2002 if (substream->ref_count > 0) 2003 return; 2004 2005 snd_pcm_drop(substream); 2006 if (substream->hw_opened) { 2007 if (substream->ops->hw_free != NULL) 2008 substream->ops->hw_free(substream); 2009 substream->ops->close(substream); 2010 substream->hw_opened = 0; 2011 } 2012 if (substream->pcm_release) { 2013 substream->pcm_release(substream); 2014 substream->pcm_release = NULL; 2015 } 2016 snd_pcm_detach_substream(substream); 2017 } 2018 2019 EXPORT_SYMBOL(snd_pcm_release_substream); 2020 2021 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2022 struct file *file, 2023 struct snd_pcm_substream **rsubstream) 2024 { 2025 struct snd_pcm_substream *substream; 2026 int err; 2027 2028 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2029 if (err < 0) 2030 return err; 2031 if (substream->ref_count > 1) { 2032 *rsubstream = substream; 2033 return 0; 2034 } 2035 2036 err = snd_pcm_hw_constraints_init(substream); 2037 if (err < 0) { 2038 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2039 goto error; 2040 } 2041 2042 if ((err = substream->ops->open(substream)) < 0) 2043 goto error; 2044 2045 substream->hw_opened = 1; 2046 2047 err = snd_pcm_hw_constraints_complete(substream); 2048 if (err < 0) { 2049 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2050 goto error; 2051 } 2052 2053 *rsubstream = substream; 2054 return 0; 2055 2056 error: 2057 snd_pcm_release_substream(substream); 2058 return err; 2059 } 2060 2061 EXPORT_SYMBOL(snd_pcm_open_substream); 2062 2063 static int snd_pcm_open_file(struct file *file, 2064 struct snd_pcm *pcm, 2065 int stream, 2066 struct snd_pcm_file **rpcm_file) 2067 { 2068 struct snd_pcm_file *pcm_file; 2069 struct snd_pcm_substream *substream; 2070 struct snd_pcm_str *str; 2071 int err; 2072 2073 snd_assert(rpcm_file != NULL, return -EINVAL); 2074 *rpcm_file = NULL; 2075 2076 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2077 if (err < 0) 2078 return err; 2079 2080 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2081 if (pcm_file == NULL) { 2082 snd_pcm_release_substream(substream); 2083 return -ENOMEM; 2084 } 2085 pcm_file->substream = substream; 2086 if (substream->ref_count == 1) { 2087 str = substream->pstr; 2088 substream->file = pcm_file; 2089 substream->pcm_release = pcm_release_private; 2090 } 2091 file->private_data = pcm_file; 2092 *rpcm_file = pcm_file; 2093 return 0; 2094 } 2095 2096 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2097 { 2098 struct snd_pcm *pcm; 2099 2100 pcm = snd_lookup_minor_data(iminor(inode), 2101 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2102 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2103 } 2104 2105 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2106 { 2107 struct snd_pcm *pcm; 2108 2109 pcm = snd_lookup_minor_data(iminor(inode), 2110 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2112 } 2113 2114 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2115 { 2116 int err; 2117 struct snd_pcm_file *pcm_file; 2118 wait_queue_t wait; 2119 2120 if (pcm == NULL) { 2121 err = -ENODEV; 2122 goto __error1; 2123 } 2124 err = snd_card_file_add(pcm->card, file); 2125 if (err < 0) 2126 goto __error1; 2127 if (!try_module_get(pcm->card->module)) { 2128 err = -EFAULT; 2129 goto __error2; 2130 } 2131 init_waitqueue_entry(&wait, current); 2132 add_wait_queue(&pcm->open_wait, &wait); 2133 mutex_lock(&pcm->open_mutex); 2134 while (1) { 2135 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2136 if (err >= 0) 2137 break; 2138 if (err == -EAGAIN) { 2139 if (file->f_flags & O_NONBLOCK) { 2140 err = -EBUSY; 2141 break; 2142 } 2143 } else 2144 break; 2145 set_current_state(TASK_INTERRUPTIBLE); 2146 mutex_unlock(&pcm->open_mutex); 2147 schedule(); 2148 mutex_lock(&pcm->open_mutex); 2149 if (signal_pending(current)) { 2150 err = -ERESTARTSYS; 2151 break; 2152 } 2153 } 2154 remove_wait_queue(&pcm->open_wait, &wait); 2155 mutex_unlock(&pcm->open_mutex); 2156 if (err < 0) 2157 goto __error; 2158 return err; 2159 2160 __error: 2161 module_put(pcm->card->module); 2162 __error2: 2163 snd_card_file_remove(pcm->card, file); 2164 __error1: 2165 return err; 2166 } 2167 2168 static int snd_pcm_release(struct inode *inode, struct file *file) 2169 { 2170 struct snd_pcm *pcm; 2171 struct snd_pcm_substream *substream; 2172 struct snd_pcm_file *pcm_file; 2173 2174 pcm_file = file->private_data; 2175 substream = pcm_file->substream; 2176 snd_assert(substream != NULL, return -ENXIO); 2177 pcm = substream->pcm; 2178 fasync_helper(-1, file, 0, &substream->runtime->fasync); 2179 mutex_lock(&pcm->open_mutex); 2180 snd_pcm_release_substream(substream); 2181 kfree(pcm_file); 2182 mutex_unlock(&pcm->open_mutex); 2183 wake_up(&pcm->open_wait); 2184 module_put(pcm->card->module); 2185 snd_card_file_remove(pcm->card, file); 2186 return 0; 2187 } 2188 2189 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2190 snd_pcm_uframes_t frames) 2191 { 2192 struct snd_pcm_runtime *runtime = substream->runtime; 2193 snd_pcm_sframes_t appl_ptr; 2194 snd_pcm_sframes_t ret; 2195 snd_pcm_sframes_t hw_avail; 2196 2197 if (frames == 0) 2198 return 0; 2199 2200 snd_pcm_stream_lock_irq(substream); 2201 switch (runtime->status->state) { 2202 case SNDRV_PCM_STATE_PREPARED: 2203 break; 2204 case SNDRV_PCM_STATE_DRAINING: 2205 case SNDRV_PCM_STATE_RUNNING: 2206 if (snd_pcm_update_hw_ptr(substream) >= 0) 2207 break; 2208 /* Fall through */ 2209 case SNDRV_PCM_STATE_XRUN: 2210 ret = -EPIPE; 2211 goto __end; 2212 default: 2213 ret = -EBADFD; 2214 goto __end; 2215 } 2216 2217 hw_avail = snd_pcm_playback_hw_avail(runtime); 2218 if (hw_avail <= 0) { 2219 ret = 0; 2220 goto __end; 2221 } 2222 if (frames > (snd_pcm_uframes_t)hw_avail) 2223 frames = hw_avail; 2224 appl_ptr = runtime->control->appl_ptr - frames; 2225 if (appl_ptr < 0) 2226 appl_ptr += runtime->boundary; 2227 runtime->control->appl_ptr = appl_ptr; 2228 ret = frames; 2229 __end: 2230 snd_pcm_stream_unlock_irq(substream); 2231 return ret; 2232 } 2233 2234 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2235 snd_pcm_uframes_t frames) 2236 { 2237 struct snd_pcm_runtime *runtime = substream->runtime; 2238 snd_pcm_sframes_t appl_ptr; 2239 snd_pcm_sframes_t ret; 2240 snd_pcm_sframes_t hw_avail; 2241 2242 if (frames == 0) 2243 return 0; 2244 2245 snd_pcm_stream_lock_irq(substream); 2246 switch (runtime->status->state) { 2247 case SNDRV_PCM_STATE_PREPARED: 2248 case SNDRV_PCM_STATE_DRAINING: 2249 break; 2250 case SNDRV_PCM_STATE_RUNNING: 2251 if (snd_pcm_update_hw_ptr(substream) >= 0) 2252 break; 2253 /* Fall through */ 2254 case SNDRV_PCM_STATE_XRUN: 2255 ret = -EPIPE; 2256 goto __end; 2257 default: 2258 ret = -EBADFD; 2259 goto __end; 2260 } 2261 2262 hw_avail = snd_pcm_capture_hw_avail(runtime); 2263 if (hw_avail <= 0) { 2264 ret = 0; 2265 goto __end; 2266 } 2267 if (frames > (snd_pcm_uframes_t)hw_avail) 2268 frames = hw_avail; 2269 appl_ptr = runtime->control->appl_ptr - frames; 2270 if (appl_ptr < 0) 2271 appl_ptr += runtime->boundary; 2272 runtime->control->appl_ptr = appl_ptr; 2273 ret = frames; 2274 __end: 2275 snd_pcm_stream_unlock_irq(substream); 2276 return ret; 2277 } 2278 2279 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2280 snd_pcm_uframes_t frames) 2281 { 2282 struct snd_pcm_runtime *runtime = substream->runtime; 2283 snd_pcm_sframes_t appl_ptr; 2284 snd_pcm_sframes_t ret; 2285 snd_pcm_sframes_t avail; 2286 2287 if (frames == 0) 2288 return 0; 2289 2290 snd_pcm_stream_lock_irq(substream); 2291 switch (runtime->status->state) { 2292 case SNDRV_PCM_STATE_PREPARED: 2293 case SNDRV_PCM_STATE_PAUSED: 2294 break; 2295 case SNDRV_PCM_STATE_DRAINING: 2296 case SNDRV_PCM_STATE_RUNNING: 2297 if (snd_pcm_update_hw_ptr(substream) >= 0) 2298 break; 2299 /* Fall through */ 2300 case SNDRV_PCM_STATE_XRUN: 2301 ret = -EPIPE; 2302 goto __end; 2303 default: 2304 ret = -EBADFD; 2305 goto __end; 2306 } 2307 2308 avail = snd_pcm_playback_avail(runtime); 2309 if (avail <= 0) { 2310 ret = 0; 2311 goto __end; 2312 } 2313 if (frames > (snd_pcm_uframes_t)avail) 2314 frames = avail; 2315 appl_ptr = runtime->control->appl_ptr + frames; 2316 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2317 appl_ptr -= runtime->boundary; 2318 runtime->control->appl_ptr = appl_ptr; 2319 ret = frames; 2320 __end: 2321 snd_pcm_stream_unlock_irq(substream); 2322 return ret; 2323 } 2324 2325 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2326 snd_pcm_uframes_t frames) 2327 { 2328 struct snd_pcm_runtime *runtime = substream->runtime; 2329 snd_pcm_sframes_t appl_ptr; 2330 snd_pcm_sframes_t ret; 2331 snd_pcm_sframes_t avail; 2332 2333 if (frames == 0) 2334 return 0; 2335 2336 snd_pcm_stream_lock_irq(substream); 2337 switch (runtime->status->state) { 2338 case SNDRV_PCM_STATE_PREPARED: 2339 case SNDRV_PCM_STATE_DRAINING: 2340 case SNDRV_PCM_STATE_PAUSED: 2341 break; 2342 case SNDRV_PCM_STATE_RUNNING: 2343 if (snd_pcm_update_hw_ptr(substream) >= 0) 2344 break; 2345 /* Fall through */ 2346 case SNDRV_PCM_STATE_XRUN: 2347 ret = -EPIPE; 2348 goto __end; 2349 default: 2350 ret = -EBADFD; 2351 goto __end; 2352 } 2353 2354 avail = snd_pcm_capture_avail(runtime); 2355 if (avail <= 0) { 2356 ret = 0; 2357 goto __end; 2358 } 2359 if (frames > (snd_pcm_uframes_t)avail) 2360 frames = avail; 2361 appl_ptr = runtime->control->appl_ptr + frames; 2362 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2363 appl_ptr -= runtime->boundary; 2364 runtime->control->appl_ptr = appl_ptr; 2365 ret = frames; 2366 __end: 2367 snd_pcm_stream_unlock_irq(substream); 2368 return ret; 2369 } 2370 2371 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2372 { 2373 struct snd_pcm_runtime *runtime = substream->runtime; 2374 int err; 2375 2376 snd_pcm_stream_lock_irq(substream); 2377 switch (runtime->status->state) { 2378 case SNDRV_PCM_STATE_DRAINING: 2379 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2380 goto __badfd; 2381 case SNDRV_PCM_STATE_RUNNING: 2382 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2383 break; 2384 /* Fall through */ 2385 case SNDRV_PCM_STATE_PREPARED: 2386 case SNDRV_PCM_STATE_SUSPENDED: 2387 err = 0; 2388 break; 2389 case SNDRV_PCM_STATE_XRUN: 2390 err = -EPIPE; 2391 break; 2392 default: 2393 __badfd: 2394 err = -EBADFD; 2395 break; 2396 } 2397 snd_pcm_stream_unlock_irq(substream); 2398 return err; 2399 } 2400 2401 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2402 snd_pcm_sframes_t __user *res) 2403 { 2404 struct snd_pcm_runtime *runtime = substream->runtime; 2405 int err; 2406 snd_pcm_sframes_t n = 0; 2407 2408 snd_pcm_stream_lock_irq(substream); 2409 switch (runtime->status->state) { 2410 case SNDRV_PCM_STATE_DRAINING: 2411 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2412 goto __badfd; 2413 case SNDRV_PCM_STATE_RUNNING: 2414 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2415 break; 2416 /* Fall through */ 2417 case SNDRV_PCM_STATE_PREPARED: 2418 case SNDRV_PCM_STATE_SUSPENDED: 2419 err = 0; 2420 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2421 n = snd_pcm_playback_hw_avail(runtime); 2422 else 2423 n = snd_pcm_capture_avail(runtime); 2424 break; 2425 case SNDRV_PCM_STATE_XRUN: 2426 err = -EPIPE; 2427 break; 2428 default: 2429 __badfd: 2430 err = -EBADFD; 2431 break; 2432 } 2433 snd_pcm_stream_unlock_irq(substream); 2434 if (!err) 2435 if (put_user(n, res)) 2436 err = -EFAULT; 2437 return err; 2438 } 2439 2440 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2441 struct snd_pcm_sync_ptr __user *_sync_ptr) 2442 { 2443 struct snd_pcm_runtime *runtime = substream->runtime; 2444 struct snd_pcm_sync_ptr sync_ptr; 2445 volatile struct snd_pcm_mmap_status *status; 2446 volatile struct snd_pcm_mmap_control *control; 2447 int err; 2448 2449 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2450 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2451 return -EFAULT; 2452 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2453 return -EFAULT; 2454 status = runtime->status; 2455 control = runtime->control; 2456 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2457 err = snd_pcm_hwsync(substream); 2458 if (err < 0) 2459 return err; 2460 } 2461 snd_pcm_stream_lock_irq(substream); 2462 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2463 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2464 else 2465 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2466 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2467 control->avail_min = sync_ptr.c.control.avail_min; 2468 else 2469 sync_ptr.c.control.avail_min = control->avail_min; 2470 sync_ptr.s.status.state = status->state; 2471 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2472 sync_ptr.s.status.tstamp = status->tstamp; 2473 sync_ptr.s.status.suspended_state = status->suspended_state; 2474 snd_pcm_stream_unlock_irq(substream); 2475 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2476 return -EFAULT; 2477 return 0; 2478 } 2479 2480 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2481 { 2482 struct snd_pcm_runtime *runtime = substream->runtime; 2483 int arg; 2484 2485 if (get_user(arg, _arg)) 2486 return -EFAULT; 2487 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2488 return -EINVAL; 2489 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2490 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2491 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2492 return 0; 2493 } 2494 2495 static int snd_pcm_common_ioctl1(struct file *file, 2496 struct snd_pcm_substream *substream, 2497 unsigned int cmd, void __user *arg) 2498 { 2499 snd_assert(substream != NULL, return -ENXIO); 2500 2501 switch (cmd) { 2502 case SNDRV_PCM_IOCTL_PVERSION: 2503 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2504 case SNDRV_PCM_IOCTL_INFO: 2505 return snd_pcm_info_user(substream, arg); 2506 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2507 return 0; 2508 case SNDRV_PCM_IOCTL_TTSTAMP: 2509 return snd_pcm_tstamp(substream, arg); 2510 case SNDRV_PCM_IOCTL_HW_REFINE: 2511 return snd_pcm_hw_refine_user(substream, arg); 2512 case SNDRV_PCM_IOCTL_HW_PARAMS: 2513 return snd_pcm_hw_params_user(substream, arg); 2514 case SNDRV_PCM_IOCTL_HW_FREE: 2515 return snd_pcm_hw_free(substream); 2516 case SNDRV_PCM_IOCTL_SW_PARAMS: 2517 return snd_pcm_sw_params_user(substream, arg); 2518 case SNDRV_PCM_IOCTL_STATUS: 2519 return snd_pcm_status_user(substream, arg); 2520 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2521 return snd_pcm_channel_info_user(substream, arg); 2522 case SNDRV_PCM_IOCTL_PREPARE: 2523 return snd_pcm_prepare(substream, file); 2524 case SNDRV_PCM_IOCTL_RESET: 2525 return snd_pcm_reset(substream); 2526 case SNDRV_PCM_IOCTL_START: 2527 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2528 case SNDRV_PCM_IOCTL_LINK: 2529 return snd_pcm_link(substream, (int)(unsigned long) arg); 2530 case SNDRV_PCM_IOCTL_UNLINK: 2531 return snd_pcm_unlink(substream); 2532 case SNDRV_PCM_IOCTL_RESUME: 2533 return snd_pcm_resume(substream); 2534 case SNDRV_PCM_IOCTL_XRUN: 2535 return snd_pcm_xrun(substream); 2536 case SNDRV_PCM_IOCTL_HWSYNC: 2537 return snd_pcm_hwsync(substream); 2538 case SNDRV_PCM_IOCTL_DELAY: 2539 return snd_pcm_delay(substream, arg); 2540 case SNDRV_PCM_IOCTL_SYNC_PTR: 2541 return snd_pcm_sync_ptr(substream, arg); 2542 #ifdef CONFIG_SND_SUPPORT_OLD_API 2543 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2544 return snd_pcm_hw_refine_old_user(substream, arg); 2545 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2546 return snd_pcm_hw_params_old_user(substream, arg); 2547 #endif 2548 case SNDRV_PCM_IOCTL_DRAIN: 2549 return snd_pcm_drain(substream); 2550 case SNDRV_PCM_IOCTL_DROP: 2551 return snd_pcm_drop(substream); 2552 case SNDRV_PCM_IOCTL_PAUSE: 2553 { 2554 int res; 2555 snd_pcm_stream_lock_irq(substream); 2556 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2557 snd_pcm_stream_unlock_irq(substream); 2558 return res; 2559 } 2560 } 2561 snd_printd("unknown ioctl = 0x%x\n", cmd); 2562 return -ENOTTY; 2563 } 2564 2565 static int snd_pcm_playback_ioctl1(struct file *file, 2566 struct snd_pcm_substream *substream, 2567 unsigned int cmd, void __user *arg) 2568 { 2569 snd_assert(substream != NULL, return -ENXIO); 2570 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); 2571 switch (cmd) { 2572 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2573 { 2574 struct snd_xferi xferi; 2575 struct snd_xferi __user *_xferi = arg; 2576 struct snd_pcm_runtime *runtime = substream->runtime; 2577 snd_pcm_sframes_t result; 2578 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2579 return -EBADFD; 2580 if (put_user(0, &_xferi->result)) 2581 return -EFAULT; 2582 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2583 return -EFAULT; 2584 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2585 __put_user(result, &_xferi->result); 2586 return result < 0 ? result : 0; 2587 } 2588 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2589 { 2590 struct snd_xfern xfern; 2591 struct snd_xfern __user *_xfern = arg; 2592 struct snd_pcm_runtime *runtime = substream->runtime; 2593 void __user **bufs; 2594 snd_pcm_sframes_t result; 2595 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2596 return -EBADFD; 2597 if (runtime->channels > 128) 2598 return -EINVAL; 2599 if (put_user(0, &_xfern->result)) 2600 return -EFAULT; 2601 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2602 return -EFAULT; 2603 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2604 if (bufs == NULL) 2605 return -ENOMEM; 2606 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2607 kfree(bufs); 2608 return -EFAULT; 2609 } 2610 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2611 kfree(bufs); 2612 __put_user(result, &_xfern->result); 2613 return result < 0 ? result : 0; 2614 } 2615 case SNDRV_PCM_IOCTL_REWIND: 2616 { 2617 snd_pcm_uframes_t frames; 2618 snd_pcm_uframes_t __user *_frames = arg; 2619 snd_pcm_sframes_t result; 2620 if (get_user(frames, _frames)) 2621 return -EFAULT; 2622 if (put_user(0, _frames)) 2623 return -EFAULT; 2624 result = snd_pcm_playback_rewind(substream, frames); 2625 __put_user(result, _frames); 2626 return result < 0 ? result : 0; 2627 } 2628 case SNDRV_PCM_IOCTL_FORWARD: 2629 { 2630 snd_pcm_uframes_t frames; 2631 snd_pcm_uframes_t __user *_frames = arg; 2632 snd_pcm_sframes_t result; 2633 if (get_user(frames, _frames)) 2634 return -EFAULT; 2635 if (put_user(0, _frames)) 2636 return -EFAULT; 2637 result = snd_pcm_playback_forward(substream, frames); 2638 __put_user(result, _frames); 2639 return result < 0 ? result : 0; 2640 } 2641 } 2642 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2643 } 2644 2645 static int snd_pcm_capture_ioctl1(struct file *file, 2646 struct snd_pcm_substream *substream, 2647 unsigned int cmd, void __user *arg) 2648 { 2649 snd_assert(substream != NULL, return -ENXIO); 2650 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); 2651 switch (cmd) { 2652 case SNDRV_PCM_IOCTL_READI_FRAMES: 2653 { 2654 struct snd_xferi xferi; 2655 struct snd_xferi __user *_xferi = arg; 2656 struct snd_pcm_runtime *runtime = substream->runtime; 2657 snd_pcm_sframes_t result; 2658 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2659 return -EBADFD; 2660 if (put_user(0, &_xferi->result)) 2661 return -EFAULT; 2662 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2663 return -EFAULT; 2664 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2665 __put_user(result, &_xferi->result); 2666 return result < 0 ? result : 0; 2667 } 2668 case SNDRV_PCM_IOCTL_READN_FRAMES: 2669 { 2670 struct snd_xfern xfern; 2671 struct snd_xfern __user *_xfern = arg; 2672 struct snd_pcm_runtime *runtime = substream->runtime; 2673 void *bufs; 2674 snd_pcm_sframes_t result; 2675 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2676 return -EBADFD; 2677 if (runtime->channels > 128) 2678 return -EINVAL; 2679 if (put_user(0, &_xfern->result)) 2680 return -EFAULT; 2681 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2682 return -EFAULT; 2683 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2684 if (bufs == NULL) 2685 return -ENOMEM; 2686 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2687 kfree(bufs); 2688 return -EFAULT; 2689 } 2690 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2691 kfree(bufs); 2692 __put_user(result, &_xfern->result); 2693 return result < 0 ? result : 0; 2694 } 2695 case SNDRV_PCM_IOCTL_REWIND: 2696 { 2697 snd_pcm_uframes_t frames; 2698 snd_pcm_uframes_t __user *_frames = arg; 2699 snd_pcm_sframes_t result; 2700 if (get_user(frames, _frames)) 2701 return -EFAULT; 2702 if (put_user(0, _frames)) 2703 return -EFAULT; 2704 result = snd_pcm_capture_rewind(substream, frames); 2705 __put_user(result, _frames); 2706 return result < 0 ? result : 0; 2707 } 2708 case SNDRV_PCM_IOCTL_FORWARD: 2709 { 2710 snd_pcm_uframes_t frames; 2711 snd_pcm_uframes_t __user *_frames = arg; 2712 snd_pcm_sframes_t result; 2713 if (get_user(frames, _frames)) 2714 return -EFAULT; 2715 if (put_user(0, _frames)) 2716 return -EFAULT; 2717 result = snd_pcm_capture_forward(substream, frames); 2718 __put_user(result, _frames); 2719 return result < 0 ? result : 0; 2720 } 2721 } 2722 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2723 } 2724 2725 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2726 unsigned long arg) 2727 { 2728 struct snd_pcm_file *pcm_file; 2729 2730 pcm_file = file->private_data; 2731 2732 if (((cmd >> 8) & 0xff) != 'A') 2733 return -ENOTTY; 2734 2735 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2736 (void __user *)arg); 2737 } 2738 2739 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2740 unsigned long arg) 2741 { 2742 struct snd_pcm_file *pcm_file; 2743 2744 pcm_file = file->private_data; 2745 2746 if (((cmd >> 8) & 0xff) != 'A') 2747 return -ENOTTY; 2748 2749 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2750 (void __user *)arg); 2751 } 2752 2753 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2754 unsigned int cmd, void *arg) 2755 { 2756 mm_segment_t fs; 2757 int result; 2758 2759 fs = snd_enter_user(); 2760 switch (substream->stream) { 2761 case SNDRV_PCM_STREAM_PLAYBACK: 2762 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2763 (void __user *)arg); 2764 break; 2765 case SNDRV_PCM_STREAM_CAPTURE: 2766 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2767 (void __user *)arg); 2768 break; 2769 default: 2770 result = -EINVAL; 2771 break; 2772 } 2773 snd_leave_user(fs); 2774 return result; 2775 } 2776 2777 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2778 2779 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2780 loff_t * offset) 2781 { 2782 struct snd_pcm_file *pcm_file; 2783 struct snd_pcm_substream *substream; 2784 struct snd_pcm_runtime *runtime; 2785 snd_pcm_sframes_t result; 2786 2787 pcm_file = file->private_data; 2788 substream = pcm_file->substream; 2789 snd_assert(substream != NULL, return -ENXIO); 2790 runtime = substream->runtime; 2791 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2792 return -EBADFD; 2793 if (!frame_aligned(runtime, count)) 2794 return -EINVAL; 2795 count = bytes_to_frames(runtime, count); 2796 result = snd_pcm_lib_read(substream, buf, count); 2797 if (result > 0) 2798 result = frames_to_bytes(runtime, result); 2799 return result; 2800 } 2801 2802 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2803 size_t count, loff_t * offset) 2804 { 2805 struct snd_pcm_file *pcm_file; 2806 struct snd_pcm_substream *substream; 2807 struct snd_pcm_runtime *runtime; 2808 snd_pcm_sframes_t result; 2809 2810 pcm_file = file->private_data; 2811 substream = pcm_file->substream; 2812 snd_assert(substream != NULL, result = -ENXIO; goto end); 2813 runtime = substream->runtime; 2814 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2815 result = -EBADFD; 2816 goto end; 2817 } 2818 if (!frame_aligned(runtime, count)) { 2819 result = -EINVAL; 2820 goto end; 2821 } 2822 count = bytes_to_frames(runtime, count); 2823 result = snd_pcm_lib_write(substream, buf, count); 2824 if (result > 0) 2825 result = frames_to_bytes(runtime, result); 2826 end: 2827 return result; 2828 } 2829 2830 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2831 unsigned long nr_segs, loff_t pos) 2832 2833 { 2834 struct snd_pcm_file *pcm_file; 2835 struct snd_pcm_substream *substream; 2836 struct snd_pcm_runtime *runtime; 2837 snd_pcm_sframes_t result; 2838 unsigned long i; 2839 void __user **bufs; 2840 snd_pcm_uframes_t frames; 2841 2842 pcm_file = iocb->ki_filp->private_data; 2843 substream = pcm_file->substream; 2844 snd_assert(substream != NULL, return -ENXIO); 2845 runtime = substream->runtime; 2846 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2847 return -EBADFD; 2848 if (nr_segs > 1024 || nr_segs != runtime->channels) 2849 return -EINVAL; 2850 if (!frame_aligned(runtime, iov->iov_len)) 2851 return -EINVAL; 2852 frames = bytes_to_samples(runtime, iov->iov_len); 2853 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2854 if (bufs == NULL) 2855 return -ENOMEM; 2856 for (i = 0; i < nr_segs; ++i) 2857 bufs[i] = iov[i].iov_base; 2858 result = snd_pcm_lib_readv(substream, bufs, frames); 2859 if (result > 0) 2860 result = frames_to_bytes(runtime, result); 2861 kfree(bufs); 2862 return result; 2863 } 2864 2865 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2866 unsigned long nr_segs, loff_t pos) 2867 { 2868 struct snd_pcm_file *pcm_file; 2869 struct snd_pcm_substream *substream; 2870 struct snd_pcm_runtime *runtime; 2871 snd_pcm_sframes_t result; 2872 unsigned long i; 2873 void __user **bufs; 2874 snd_pcm_uframes_t frames; 2875 2876 pcm_file = iocb->ki_filp->private_data; 2877 substream = pcm_file->substream; 2878 snd_assert(substream != NULL, result = -ENXIO; goto end); 2879 runtime = substream->runtime; 2880 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2881 result = -EBADFD; 2882 goto end; 2883 } 2884 if (nr_segs > 128 || nr_segs != runtime->channels || 2885 !frame_aligned(runtime, iov->iov_len)) { 2886 result = -EINVAL; 2887 goto end; 2888 } 2889 frames = bytes_to_samples(runtime, iov->iov_len); 2890 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2891 if (bufs == NULL) 2892 return -ENOMEM; 2893 for (i = 0; i < nr_segs; ++i) 2894 bufs[i] = iov[i].iov_base; 2895 result = snd_pcm_lib_writev(substream, bufs, frames); 2896 if (result > 0) 2897 result = frames_to_bytes(runtime, result); 2898 kfree(bufs); 2899 end: 2900 return result; 2901 } 2902 2903 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2904 { 2905 struct snd_pcm_file *pcm_file; 2906 struct snd_pcm_substream *substream; 2907 struct snd_pcm_runtime *runtime; 2908 unsigned int mask; 2909 snd_pcm_uframes_t avail; 2910 2911 pcm_file = file->private_data; 2912 2913 substream = pcm_file->substream; 2914 snd_assert(substream != NULL, return -ENXIO); 2915 runtime = substream->runtime; 2916 2917 poll_wait(file, &runtime->sleep, wait); 2918 2919 snd_pcm_stream_lock_irq(substream); 2920 avail = snd_pcm_playback_avail(runtime); 2921 switch (runtime->status->state) { 2922 case SNDRV_PCM_STATE_RUNNING: 2923 case SNDRV_PCM_STATE_PREPARED: 2924 case SNDRV_PCM_STATE_PAUSED: 2925 if (avail >= runtime->control->avail_min) { 2926 mask = POLLOUT | POLLWRNORM; 2927 break; 2928 } 2929 /* Fall through */ 2930 case SNDRV_PCM_STATE_DRAINING: 2931 mask = 0; 2932 break; 2933 default: 2934 mask = POLLOUT | POLLWRNORM | POLLERR; 2935 break; 2936 } 2937 snd_pcm_stream_unlock_irq(substream); 2938 return mask; 2939 } 2940 2941 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2942 { 2943 struct snd_pcm_file *pcm_file; 2944 struct snd_pcm_substream *substream; 2945 struct snd_pcm_runtime *runtime; 2946 unsigned int mask; 2947 snd_pcm_uframes_t avail; 2948 2949 pcm_file = file->private_data; 2950 2951 substream = pcm_file->substream; 2952 snd_assert(substream != NULL, return -ENXIO); 2953 runtime = substream->runtime; 2954 2955 poll_wait(file, &runtime->sleep, wait); 2956 2957 snd_pcm_stream_lock_irq(substream); 2958 avail = snd_pcm_capture_avail(runtime); 2959 switch (runtime->status->state) { 2960 case SNDRV_PCM_STATE_RUNNING: 2961 case SNDRV_PCM_STATE_PREPARED: 2962 case SNDRV_PCM_STATE_PAUSED: 2963 if (avail >= runtime->control->avail_min) { 2964 mask = POLLIN | POLLRDNORM; 2965 break; 2966 } 2967 mask = 0; 2968 break; 2969 case SNDRV_PCM_STATE_DRAINING: 2970 if (avail > 0) { 2971 mask = POLLIN | POLLRDNORM; 2972 break; 2973 } 2974 /* Fall through */ 2975 default: 2976 mask = POLLIN | POLLRDNORM | POLLERR; 2977 break; 2978 } 2979 snd_pcm_stream_unlock_irq(substream); 2980 return mask; 2981 } 2982 2983 /* 2984 * mmap support 2985 */ 2986 2987 /* 2988 * Only on coherent architectures, we can mmap the status and the control records 2989 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2990 */ 2991 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2992 /* 2993 * mmap status record 2994 */ 2995 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2996 struct vm_fault *vmf) 2997 { 2998 struct snd_pcm_substream *substream = area->vm_private_data; 2999 struct snd_pcm_runtime *runtime; 3000 3001 if (substream == NULL) 3002 return VM_FAULT_SIGBUS; 3003 runtime = substream->runtime; 3004 vmf->page = virt_to_page(runtime->status); 3005 get_page(vmf->page); 3006 return 0; 3007 } 3008 3009 static struct vm_operations_struct snd_pcm_vm_ops_status = 3010 { 3011 .fault = snd_pcm_mmap_status_fault, 3012 }; 3013 3014 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3015 struct vm_area_struct *area) 3016 { 3017 struct snd_pcm_runtime *runtime; 3018 long size; 3019 if (!(area->vm_flags & VM_READ)) 3020 return -EINVAL; 3021 runtime = substream->runtime; 3022 snd_assert(runtime != NULL, return -EAGAIN); 3023 size = area->vm_end - area->vm_start; 3024 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3025 return -EINVAL; 3026 area->vm_ops = &snd_pcm_vm_ops_status; 3027 area->vm_private_data = substream; 3028 area->vm_flags |= VM_RESERVED; 3029 return 0; 3030 } 3031 3032 /* 3033 * mmap control record 3034 */ 3035 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3036 struct vm_fault *vmf) 3037 { 3038 struct snd_pcm_substream *substream = area->vm_private_data; 3039 struct snd_pcm_runtime *runtime; 3040 3041 if (substream == NULL) 3042 return VM_FAULT_SIGBUS; 3043 runtime = substream->runtime; 3044 vmf->page = virt_to_page(runtime->control); 3045 get_page(vmf->page); 3046 return 0; 3047 } 3048 3049 static struct vm_operations_struct snd_pcm_vm_ops_control = 3050 { 3051 .fault = snd_pcm_mmap_control_fault, 3052 }; 3053 3054 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3055 struct vm_area_struct *area) 3056 { 3057 struct snd_pcm_runtime *runtime; 3058 long size; 3059 if (!(area->vm_flags & VM_READ)) 3060 return -EINVAL; 3061 runtime = substream->runtime; 3062 snd_assert(runtime != NULL, return -EAGAIN); 3063 size = area->vm_end - area->vm_start; 3064 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3065 return -EINVAL; 3066 area->vm_ops = &snd_pcm_vm_ops_control; 3067 area->vm_private_data = substream; 3068 area->vm_flags |= VM_RESERVED; 3069 return 0; 3070 } 3071 #else /* ! coherent mmap */ 3072 /* 3073 * don't support mmap for status and control records. 3074 */ 3075 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3076 struct vm_area_struct *area) 3077 { 3078 return -ENXIO; 3079 } 3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3081 struct vm_area_struct *area) 3082 { 3083 return -ENXIO; 3084 } 3085 #endif /* coherent mmap */ 3086 3087 /* 3088 * fault callback for mmapping a RAM page 3089 */ 3090 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3091 struct vm_fault *vmf) 3092 { 3093 struct snd_pcm_substream *substream = area->vm_private_data; 3094 struct snd_pcm_runtime *runtime; 3095 unsigned long offset; 3096 struct page * page; 3097 void *vaddr; 3098 size_t dma_bytes; 3099 3100 if (substream == NULL) 3101 return VM_FAULT_SIGBUS; 3102 runtime = substream->runtime; 3103 offset = vmf->pgoff << PAGE_SHIFT; 3104 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3105 if (offset > dma_bytes - PAGE_SIZE) 3106 return VM_FAULT_SIGBUS; 3107 if (substream->ops->page) { 3108 page = substream->ops->page(substream, offset); 3109 if (!page) 3110 return VM_FAULT_SIGBUS; 3111 } else { 3112 vaddr = runtime->dma_area + offset; 3113 page = virt_to_page(vaddr); 3114 } 3115 get_page(page); 3116 vmf->page = page; 3117 return 0; 3118 } 3119 3120 static struct vm_operations_struct snd_pcm_vm_ops_data = 3121 { 3122 .open = snd_pcm_mmap_data_open, 3123 .close = snd_pcm_mmap_data_close, 3124 .fault = snd_pcm_mmap_data_fault, 3125 }; 3126 3127 /* 3128 * mmap the DMA buffer on RAM 3129 */ 3130 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3131 struct vm_area_struct *area) 3132 { 3133 area->vm_ops = &snd_pcm_vm_ops_data; 3134 area->vm_private_data = substream; 3135 area->vm_flags |= VM_RESERVED; 3136 atomic_inc(&substream->mmap_count); 3137 return 0; 3138 } 3139 3140 /* 3141 * mmap the DMA buffer on I/O memory area 3142 */ 3143 #if SNDRV_PCM_INFO_MMAP_IOMEM 3144 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3145 { 3146 .open = snd_pcm_mmap_data_open, 3147 .close = snd_pcm_mmap_data_close, 3148 }; 3149 3150 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3151 struct vm_area_struct *area) 3152 { 3153 long size; 3154 unsigned long offset; 3155 3156 #ifdef pgprot_noncached 3157 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3158 #endif 3159 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3160 area->vm_private_data = substream; 3161 area->vm_flags |= VM_IO; 3162 size = area->vm_end - area->vm_start; 3163 offset = area->vm_pgoff << PAGE_SHIFT; 3164 if (io_remap_pfn_range(area, area->vm_start, 3165 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3166 size, area->vm_page_prot)) 3167 return -EAGAIN; 3168 atomic_inc(&substream->mmap_count); 3169 return 0; 3170 } 3171 3172 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3173 #endif /* SNDRV_PCM_INFO_MMAP */ 3174 3175 /* 3176 * mmap DMA buffer 3177 */ 3178 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3179 struct vm_area_struct *area) 3180 { 3181 struct snd_pcm_runtime *runtime; 3182 long size; 3183 unsigned long offset; 3184 size_t dma_bytes; 3185 3186 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3187 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3188 return -EINVAL; 3189 } else { 3190 if (!(area->vm_flags & VM_READ)) 3191 return -EINVAL; 3192 } 3193 runtime = substream->runtime; 3194 snd_assert(runtime != NULL, return -EAGAIN); 3195 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3196 return -EBADFD; 3197 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3198 return -ENXIO; 3199 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3200 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3201 return -EINVAL; 3202 size = area->vm_end - area->vm_start; 3203 offset = area->vm_pgoff << PAGE_SHIFT; 3204 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3205 if ((size_t)size > dma_bytes) 3206 return -EINVAL; 3207 if (offset > dma_bytes - size) 3208 return -EINVAL; 3209 3210 if (substream->ops->mmap) 3211 return substream->ops->mmap(substream, area); 3212 else 3213 return snd_pcm_default_mmap(substream, area); 3214 } 3215 3216 EXPORT_SYMBOL(snd_pcm_mmap_data); 3217 3218 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3219 { 3220 struct snd_pcm_file * pcm_file; 3221 struct snd_pcm_substream *substream; 3222 unsigned long offset; 3223 3224 pcm_file = file->private_data; 3225 substream = pcm_file->substream; 3226 snd_assert(substream != NULL, return -ENXIO); 3227 3228 offset = area->vm_pgoff << PAGE_SHIFT; 3229 switch (offset) { 3230 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3231 if (pcm_file->no_compat_mmap) 3232 return -ENXIO; 3233 return snd_pcm_mmap_status(substream, file, area); 3234 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3235 if (pcm_file->no_compat_mmap) 3236 return -ENXIO; 3237 return snd_pcm_mmap_control(substream, file, area); 3238 default: 3239 return snd_pcm_mmap_data(substream, file, area); 3240 } 3241 return 0; 3242 } 3243 3244 static int snd_pcm_fasync(int fd, struct file * file, int on) 3245 { 3246 struct snd_pcm_file * pcm_file; 3247 struct snd_pcm_substream *substream; 3248 struct snd_pcm_runtime *runtime; 3249 int err; 3250 3251 pcm_file = file->private_data; 3252 substream = pcm_file->substream; 3253 snd_assert(substream != NULL, return -ENXIO); 3254 runtime = substream->runtime; 3255 3256 err = fasync_helper(fd, file, on, &runtime->fasync); 3257 if (err < 0) 3258 return err; 3259 return 0; 3260 } 3261 3262 /* 3263 * ioctl32 compat 3264 */ 3265 #ifdef CONFIG_COMPAT 3266 #include "pcm_compat.c" 3267 #else 3268 #define snd_pcm_ioctl_compat NULL 3269 #endif 3270 3271 /* 3272 * To be removed helpers to keep binary compatibility 3273 */ 3274 3275 #ifdef CONFIG_SND_SUPPORT_OLD_API 3276 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3277 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3278 3279 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3280 struct snd_pcm_hw_params_old *oparams) 3281 { 3282 unsigned int i; 3283 3284 memset(params, 0, sizeof(*params)); 3285 params->flags = oparams->flags; 3286 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3287 params->masks[i].bits[0] = oparams->masks[i]; 3288 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3289 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3290 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3291 params->info = oparams->info; 3292 params->msbits = oparams->msbits; 3293 params->rate_num = oparams->rate_num; 3294 params->rate_den = oparams->rate_den; 3295 params->fifo_size = oparams->fifo_size; 3296 } 3297 3298 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3299 struct snd_pcm_hw_params *params) 3300 { 3301 unsigned int i; 3302 3303 memset(oparams, 0, sizeof(*oparams)); 3304 oparams->flags = params->flags; 3305 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3306 oparams->masks[i] = params->masks[i].bits[0]; 3307 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3308 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3309 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3310 oparams->info = params->info; 3311 oparams->msbits = params->msbits; 3312 oparams->rate_num = params->rate_num; 3313 oparams->rate_den = params->rate_den; 3314 oparams->fifo_size = params->fifo_size; 3315 } 3316 3317 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3318 struct snd_pcm_hw_params_old __user * _oparams) 3319 { 3320 struct snd_pcm_hw_params *params; 3321 struct snd_pcm_hw_params_old *oparams = NULL; 3322 int err; 3323 3324 params = kmalloc(sizeof(*params), GFP_KERNEL); 3325 if (!params) { 3326 err = -ENOMEM; 3327 goto out; 3328 } 3329 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3330 if (!oparams) { 3331 err = -ENOMEM; 3332 goto out; 3333 } 3334 3335 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3336 err = -EFAULT; 3337 goto out; 3338 } 3339 snd_pcm_hw_convert_from_old_params(params, oparams); 3340 err = snd_pcm_hw_refine(substream, params); 3341 snd_pcm_hw_convert_to_old_params(oparams, params); 3342 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3343 if (!err) 3344 err = -EFAULT; 3345 } 3346 out: 3347 kfree(params); 3348 kfree(oparams); 3349 return err; 3350 } 3351 3352 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3353 struct snd_pcm_hw_params_old __user * _oparams) 3354 { 3355 struct snd_pcm_hw_params *params; 3356 struct snd_pcm_hw_params_old *oparams = NULL; 3357 int err; 3358 3359 params = kmalloc(sizeof(*params), GFP_KERNEL); 3360 if (!params) { 3361 err = -ENOMEM; 3362 goto out; 3363 } 3364 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3365 if (!oparams) { 3366 err = -ENOMEM; 3367 goto out; 3368 } 3369 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3370 err = -EFAULT; 3371 goto out; 3372 } 3373 snd_pcm_hw_convert_from_old_params(params, oparams); 3374 err = snd_pcm_hw_params(substream, params); 3375 snd_pcm_hw_convert_to_old_params(oparams, params); 3376 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3377 if (!err) 3378 err = -EFAULT; 3379 } 3380 out: 3381 kfree(params); 3382 kfree(oparams); 3383 return err; 3384 } 3385 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3386 3387 /* 3388 * Register section 3389 */ 3390 3391 const struct file_operations snd_pcm_f_ops[2] = { 3392 { 3393 .owner = THIS_MODULE, 3394 .write = snd_pcm_write, 3395 .aio_write = snd_pcm_aio_write, 3396 .open = snd_pcm_playback_open, 3397 .release = snd_pcm_release, 3398 .poll = snd_pcm_playback_poll, 3399 .unlocked_ioctl = snd_pcm_playback_ioctl, 3400 .compat_ioctl = snd_pcm_ioctl_compat, 3401 .mmap = snd_pcm_mmap, 3402 .fasync = snd_pcm_fasync, 3403 }, 3404 { 3405 .owner = THIS_MODULE, 3406 .read = snd_pcm_read, 3407 .aio_read = snd_pcm_aio_read, 3408 .open = snd_pcm_capture_open, 3409 .release = snd_pcm_release, 3410 .poll = snd_pcm_capture_poll, 3411 .unlocked_ioctl = snd_pcm_capture_ioctl, 3412 .compat_ioctl = snd_pcm_ioctl_compat, 3413 .mmap = snd_pcm_mmap, 3414 .fasync = snd_pcm_fasync, 3415 } 3416 }; 3417