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/smp_lock.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos_params.h> 28 #include <linux/uio.h> 29 #include <linux/dma-mapping.h> 30 #include <linux/math64.h> 31 #include <sound/core.h> 32 #include <sound/control.h> 33 #include <sound/info.h> 34 #include <sound/pcm.h> 35 #include <sound/pcm_params.h> 36 #include <sound/timer.h> 37 #include <sound/minors.h> 38 #include <asm/io.h> 39 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 40 #include <dma-coherence.h> 41 #endif 42 43 /* 44 * Compatibility 45 */ 46 47 struct snd_pcm_hw_params_old { 48 unsigned int flags; 49 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 50 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 51 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 52 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 53 unsigned int rmask; 54 unsigned int cmask; 55 unsigned int info; 56 unsigned int msbits; 57 unsigned int rate_num; 58 unsigned int rate_den; 59 snd_pcm_uframes_t fifo_size; 60 unsigned char reserved[64]; 61 }; 62 63 #ifdef CONFIG_SND_SUPPORT_OLD_API 64 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 65 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 66 67 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params_old __user * _oparams); 69 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 70 struct snd_pcm_hw_params_old __user * _oparams); 71 #endif 72 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 73 74 /* 75 * 76 */ 77 78 DEFINE_RWLOCK(snd_pcm_link_rwlock); 79 EXPORT_SYMBOL(snd_pcm_link_rwlock); 80 81 static DECLARE_RWSEM(snd_pcm_link_rwsem); 82 83 static inline mm_segment_t snd_enter_user(void) 84 { 85 mm_segment_t fs = get_fs(); 86 set_fs(get_ds()); 87 return fs; 88 } 89 90 static inline void snd_leave_user(mm_segment_t fs) 91 { 92 set_fs(fs); 93 } 94 95 96 97 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 98 { 99 struct snd_pcm_runtime *runtime; 100 struct snd_pcm *pcm = substream->pcm; 101 struct snd_pcm_str *pstr = substream->pstr; 102 103 memset(info, 0, sizeof(*info)); 104 info->card = pcm->card->number; 105 info->device = pcm->device; 106 info->stream = substream->stream; 107 info->subdevice = substream->number; 108 strlcpy(info->id, pcm->id, sizeof(info->id)); 109 strlcpy(info->name, pcm->name, sizeof(info->name)); 110 info->dev_class = pcm->dev_class; 111 info->dev_subclass = pcm->dev_subclass; 112 info->subdevices_count = pstr->substream_count; 113 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 114 strlcpy(info->subname, substream->name, sizeof(info->subname)); 115 runtime = substream->runtime; 116 /* AB: FIXME!!! This is definitely nonsense */ 117 if (runtime) { 118 info->sync = runtime->sync; 119 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 120 } 121 return 0; 122 } 123 124 int snd_pcm_info_user(struct snd_pcm_substream *substream, 125 struct snd_pcm_info __user * _info) 126 { 127 struct snd_pcm_info *info; 128 int err; 129 130 info = kmalloc(sizeof(*info), GFP_KERNEL); 131 if (! info) 132 return -ENOMEM; 133 err = snd_pcm_info(substream, info); 134 if (err >= 0) { 135 if (copy_to_user(_info, info, sizeof(*info))) 136 err = -EFAULT; 137 } 138 kfree(info); 139 return err; 140 } 141 142 #undef RULES_DEBUG 143 144 #ifdef RULES_DEBUG 145 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 146 char *snd_pcm_hw_param_names[] = { 147 HW_PARAM(ACCESS), 148 HW_PARAM(FORMAT), 149 HW_PARAM(SUBFORMAT), 150 HW_PARAM(SAMPLE_BITS), 151 HW_PARAM(FRAME_BITS), 152 HW_PARAM(CHANNELS), 153 HW_PARAM(RATE), 154 HW_PARAM(PERIOD_TIME), 155 HW_PARAM(PERIOD_SIZE), 156 HW_PARAM(PERIOD_BYTES), 157 HW_PARAM(PERIODS), 158 HW_PARAM(BUFFER_TIME), 159 HW_PARAM(BUFFER_SIZE), 160 HW_PARAM(BUFFER_BYTES), 161 HW_PARAM(TICK_TIME), 162 }; 163 #endif 164 165 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 166 struct snd_pcm_hw_params *params) 167 { 168 unsigned int k; 169 struct snd_pcm_hardware *hw; 170 struct snd_interval *i = NULL; 171 struct snd_mask *m = NULL; 172 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 173 unsigned int rstamps[constrs->rules_num]; 174 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 175 unsigned int stamp = 2; 176 int changed, again; 177 178 params->info = 0; 179 params->fifo_size = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 181 params->msbits = 0; 182 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 183 params->rate_num = 0; 184 params->rate_den = 0; 185 } 186 187 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 188 m = hw_param_mask(params, k); 189 if (snd_mask_empty(m)) 190 return -EINVAL; 191 if (!(params->rmask & (1 << k))) 192 continue; 193 #ifdef RULES_DEBUG 194 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 195 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 196 #endif 197 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 198 #ifdef RULES_DEBUG 199 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 200 #endif 201 if (changed) 202 params->cmask |= 1 << k; 203 if (changed < 0) 204 return changed; 205 } 206 207 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 208 i = hw_param_interval(params, k); 209 if (snd_interval_empty(i)) 210 return -EINVAL; 211 if (!(params->rmask & (1 << k))) 212 continue; 213 #ifdef RULES_DEBUG 214 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 215 if (i->empty) 216 printk("empty"); 217 else 218 printk("%c%u %u%c", 219 i->openmin ? '(' : '[', i->min, 220 i->max, i->openmax ? ')' : ']'); 221 printk(" -> "); 222 #endif 223 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 224 #ifdef RULES_DEBUG 225 if (i->empty) 226 printk("empty\n"); 227 else 228 printk("%c%u %u%c\n", 229 i->openmin ? '(' : '[', i->min, 230 i->max, i->openmax ? ')' : ']'); 231 #endif 232 if (changed) 233 params->cmask |= 1 << k; 234 if (changed < 0) 235 return changed; 236 } 237 238 for (k = 0; k < constrs->rules_num; k++) 239 rstamps[k] = 0; 240 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 241 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 242 do { 243 again = 0; 244 for (k = 0; k < constrs->rules_num; k++) { 245 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 246 unsigned int d; 247 int doit = 0; 248 if (r->cond && !(r->cond & params->flags)) 249 continue; 250 for (d = 0; r->deps[d] >= 0; d++) { 251 if (vstamps[r->deps[d]] > rstamps[k]) { 252 doit = 1; 253 break; 254 } 255 } 256 if (!doit) 257 continue; 258 #ifdef RULES_DEBUG 259 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 260 if (r->var >= 0) { 261 printk("%s = ", snd_pcm_hw_param_names[r->var]); 262 if (hw_is_mask(r->var)) { 263 m = hw_param_mask(params, r->var); 264 printk("%x", *m->bits); 265 } else { 266 i = hw_param_interval(params, r->var); 267 if (i->empty) 268 printk("empty"); 269 else 270 printk("%c%u %u%c", 271 i->openmin ? '(' : '[', i->min, 272 i->max, i->openmax ? ')' : ']'); 273 } 274 } 275 #endif 276 changed = r->func(params, r); 277 #ifdef RULES_DEBUG 278 if (r->var >= 0) { 279 printk(" -> "); 280 if (hw_is_mask(r->var)) 281 printk("%x", *m->bits); 282 else { 283 if (i->empty) 284 printk("empty"); 285 else 286 printk("%c%u %u%c", 287 i->openmin ? '(' : '[', i->min, 288 i->max, i->openmax ? ')' : ']'); 289 } 290 } 291 printk("\n"); 292 #endif 293 rstamps[k] = stamp; 294 if (changed && r->var >= 0) { 295 params->cmask |= (1 << r->var); 296 vstamps[r->var] = stamp; 297 again = 1; 298 } 299 if (changed < 0) 300 return changed; 301 stamp++; 302 } 303 } while (again); 304 if (!params->msbits) { 305 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 306 if (snd_interval_single(i)) 307 params->msbits = snd_interval_value(i); 308 } 309 310 if (!params->rate_den) { 311 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 312 if (snd_interval_single(i)) { 313 params->rate_num = snd_interval_value(i); 314 params->rate_den = 1; 315 } 316 } 317 318 hw = &substream->runtime->hw; 319 if (!params->info) 320 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 321 if (!params->fifo_size) { 322 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 323 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 324 if (snd_mask_min(m) == snd_mask_max(m) && 325 snd_interval_min(i) == snd_interval_max(i)) { 326 changed = substream->ops->ioctl(substream, 327 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 328 if (changed < 0) 329 return changed; 330 } 331 } 332 params->rmask = 0; 333 return 0; 334 } 335 336 EXPORT_SYMBOL(snd_pcm_hw_refine); 337 338 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 339 struct snd_pcm_hw_params __user * _params) 340 { 341 struct snd_pcm_hw_params *params; 342 int err; 343 344 params = memdup_user(_params, sizeof(*params)); 345 if (IS_ERR(params)) 346 return PTR_ERR(params); 347 348 err = snd_pcm_hw_refine(substream, params); 349 if (copy_to_user(_params, params, sizeof(*params))) { 350 if (!err) 351 err = -EFAULT; 352 } 353 354 kfree(params); 355 return err; 356 } 357 358 static int period_to_usecs(struct snd_pcm_runtime *runtime) 359 { 360 int usecs; 361 362 if (! runtime->rate) 363 return -1; /* invalid */ 364 365 /* take 75% of period time as the deadline */ 366 usecs = (750000 / runtime->rate) * runtime->period_size; 367 usecs += ((750000 % runtime->rate) * runtime->period_size) / 368 runtime->rate; 369 370 return usecs; 371 } 372 373 static int calc_boundary(struct snd_pcm_runtime *runtime) 374 { 375 u_int64_t boundary; 376 377 boundary = (u_int64_t)runtime->buffer_size * 378 (u_int64_t)runtime->period_size; 379 #if BITS_PER_LONG < 64 380 /* try to find lowest common multiple for buffer and period */ 381 if (boundary > LONG_MAX - runtime->buffer_size) { 382 u_int32_t remainder = -1; 383 u_int32_t divident = runtime->buffer_size; 384 u_int32_t divisor = runtime->period_size; 385 while (remainder) { 386 remainder = divident % divisor; 387 if (remainder) { 388 divident = divisor; 389 divisor = remainder; 390 } 391 } 392 boundary = div_u64(boundary, divisor); 393 if (boundary > LONG_MAX - runtime->buffer_size) 394 return -ERANGE; 395 } 396 #endif 397 if (boundary == 0) 398 return -ERANGE; 399 runtime->boundary = boundary; 400 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 401 runtime->boundary *= 2; 402 return 0; 403 } 404 405 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 406 struct snd_pcm_hw_params *params) 407 { 408 struct snd_pcm_runtime *runtime; 409 int err, usecs; 410 unsigned int bits; 411 snd_pcm_uframes_t frames; 412 413 if (PCM_RUNTIME_CHECK(substream)) 414 return -ENXIO; 415 runtime = substream->runtime; 416 snd_pcm_stream_lock_irq(substream); 417 switch (runtime->status->state) { 418 case SNDRV_PCM_STATE_OPEN: 419 case SNDRV_PCM_STATE_SETUP: 420 case SNDRV_PCM_STATE_PREPARED: 421 break; 422 default: 423 snd_pcm_stream_unlock_irq(substream); 424 return -EBADFD; 425 } 426 snd_pcm_stream_unlock_irq(substream); 427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 428 if (!substream->oss.oss) 429 #endif 430 if (atomic_read(&substream->mmap_count)) 431 return -EBADFD; 432 433 params->rmask = ~0U; 434 err = snd_pcm_hw_refine(substream, params); 435 if (err < 0) 436 goto _error; 437 438 err = snd_pcm_hw_params_choose(substream, params); 439 if (err < 0) 440 goto _error; 441 442 if (substream->ops->hw_params != NULL) { 443 err = substream->ops->hw_params(substream, params); 444 if (err < 0) 445 goto _error; 446 } 447 448 runtime->access = params_access(params); 449 runtime->format = params_format(params); 450 runtime->subformat = params_subformat(params); 451 runtime->channels = params_channels(params); 452 runtime->rate = params_rate(params); 453 runtime->period_size = params_period_size(params); 454 runtime->periods = params_periods(params); 455 runtime->buffer_size = params_buffer_size(params); 456 runtime->info = params->info; 457 runtime->rate_num = params->rate_num; 458 runtime->rate_den = params->rate_den; 459 460 bits = snd_pcm_format_physical_width(runtime->format); 461 runtime->sample_bits = bits; 462 bits *= runtime->channels; 463 runtime->frame_bits = bits; 464 frames = 1; 465 while (bits % 8 != 0) { 466 bits *= 2; 467 frames *= 2; 468 } 469 runtime->byte_align = bits / 8; 470 runtime->min_align = frames; 471 472 /* Default sw params */ 473 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 474 runtime->period_step = 1; 475 runtime->control->avail_min = runtime->period_size; 476 runtime->start_threshold = 1; 477 runtime->stop_threshold = runtime->buffer_size; 478 runtime->silence_threshold = 0; 479 runtime->silence_size = 0; 480 err = calc_boundary(runtime); 481 if (err < 0) 482 goto _error; 483 484 snd_pcm_timer_resolution_change(substream); 485 runtime->status->state = SNDRV_PCM_STATE_SETUP; 486 487 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, 488 substream->latency_id); 489 if ((usecs = period_to_usecs(runtime)) >= 0) 490 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, 491 substream->latency_id, usecs); 492 return 0; 493 _error: 494 /* hardware might be unuseable from this time, 495 so we force application to retry to set 496 the correct hardware parameter settings */ 497 runtime->status->state = SNDRV_PCM_STATE_OPEN; 498 if (substream->ops->hw_free != NULL) 499 substream->ops->hw_free(substream); 500 return err; 501 } 502 503 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 504 struct snd_pcm_hw_params __user * _params) 505 { 506 struct snd_pcm_hw_params *params; 507 int err; 508 509 params = memdup_user(_params, sizeof(*params)); 510 if (IS_ERR(params)) 511 return PTR_ERR(params); 512 513 err = snd_pcm_hw_params(substream, params); 514 if (copy_to_user(_params, params, sizeof(*params))) { 515 if (!err) 516 err = -EFAULT; 517 } 518 519 kfree(params); 520 return err; 521 } 522 523 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 524 { 525 struct snd_pcm_runtime *runtime; 526 int result = 0; 527 528 if (PCM_RUNTIME_CHECK(substream)) 529 return -ENXIO; 530 runtime = substream->runtime; 531 snd_pcm_stream_lock_irq(substream); 532 switch (runtime->status->state) { 533 case SNDRV_PCM_STATE_SETUP: 534 case SNDRV_PCM_STATE_PREPARED: 535 break; 536 default: 537 snd_pcm_stream_unlock_irq(substream); 538 return -EBADFD; 539 } 540 snd_pcm_stream_unlock_irq(substream); 541 if (atomic_read(&substream->mmap_count)) 542 return -EBADFD; 543 if (substream->ops->hw_free) 544 result = substream->ops->hw_free(substream); 545 runtime->status->state = SNDRV_PCM_STATE_OPEN; 546 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, 547 substream->latency_id); 548 return result; 549 } 550 551 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 552 struct snd_pcm_sw_params *params) 553 { 554 struct snd_pcm_runtime *runtime; 555 int err; 556 557 if (PCM_RUNTIME_CHECK(substream)) 558 return -ENXIO; 559 runtime = substream->runtime; 560 snd_pcm_stream_lock_irq(substream); 561 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 562 snd_pcm_stream_unlock_irq(substream); 563 return -EBADFD; 564 } 565 snd_pcm_stream_unlock_irq(substream); 566 567 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 568 return -EINVAL; 569 if (params->avail_min == 0) 570 return -EINVAL; 571 if (params->silence_size >= runtime->boundary) { 572 if (params->silence_threshold != 0) 573 return -EINVAL; 574 } else { 575 if (params->silence_size > params->silence_threshold) 576 return -EINVAL; 577 if (params->silence_threshold > runtime->buffer_size) 578 return -EINVAL; 579 } 580 err = 0; 581 snd_pcm_stream_lock_irq(substream); 582 runtime->tstamp_mode = params->tstamp_mode; 583 runtime->period_step = params->period_step; 584 runtime->control->avail_min = params->avail_min; 585 runtime->start_threshold = params->start_threshold; 586 runtime->stop_threshold = params->stop_threshold; 587 runtime->silence_threshold = params->silence_threshold; 588 runtime->silence_size = params->silence_size; 589 params->boundary = runtime->boundary; 590 if (snd_pcm_running(substream)) { 591 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 592 runtime->silence_size > 0) 593 snd_pcm_playback_silence(substream, ULONG_MAX); 594 err = snd_pcm_update_state(substream, runtime); 595 } 596 snd_pcm_stream_unlock_irq(substream); 597 return err; 598 } 599 600 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 601 struct snd_pcm_sw_params __user * _params) 602 { 603 struct snd_pcm_sw_params params; 604 int err; 605 if (copy_from_user(¶ms, _params, sizeof(params))) 606 return -EFAULT; 607 err = snd_pcm_sw_params(substream, ¶ms); 608 if (copy_to_user(_params, ¶ms, sizeof(params))) 609 return -EFAULT; 610 return err; 611 } 612 613 int snd_pcm_status(struct snd_pcm_substream *substream, 614 struct snd_pcm_status *status) 615 { 616 struct snd_pcm_runtime *runtime = substream->runtime; 617 618 snd_pcm_stream_lock_irq(substream); 619 status->state = runtime->status->state; 620 status->suspended_state = runtime->status->suspended_state; 621 if (status->state == SNDRV_PCM_STATE_OPEN) 622 goto _end; 623 status->trigger_tstamp = runtime->trigger_tstamp; 624 if (snd_pcm_running(substream)) { 625 snd_pcm_update_hw_ptr(substream); 626 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 627 status->tstamp = runtime->status->tstamp; 628 goto _tstamp_end; 629 } 630 } 631 snd_pcm_gettime(runtime, &status->tstamp); 632 _tstamp_end: 633 status->appl_ptr = runtime->control->appl_ptr; 634 status->hw_ptr = runtime->status->hw_ptr; 635 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 636 status->avail = snd_pcm_playback_avail(runtime); 637 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 638 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 639 status->delay = runtime->buffer_size - status->avail; 640 status->delay += runtime->delay; 641 } else 642 status->delay = 0; 643 } else { 644 status->avail = snd_pcm_capture_avail(runtime); 645 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 646 status->delay = status->avail + runtime->delay; 647 else 648 status->delay = 0; 649 } 650 status->avail_max = runtime->avail_max; 651 status->overrange = runtime->overrange; 652 runtime->avail_max = 0; 653 runtime->overrange = 0; 654 _end: 655 snd_pcm_stream_unlock_irq(substream); 656 return 0; 657 } 658 659 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 660 struct snd_pcm_status __user * _status) 661 { 662 struct snd_pcm_status status; 663 int res; 664 665 memset(&status, 0, sizeof(status)); 666 res = snd_pcm_status(substream, &status); 667 if (res < 0) 668 return res; 669 if (copy_to_user(_status, &status, sizeof(status))) 670 return -EFAULT; 671 return 0; 672 } 673 674 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 675 struct snd_pcm_channel_info * info) 676 { 677 struct snd_pcm_runtime *runtime; 678 unsigned int channel; 679 680 channel = info->channel; 681 runtime = substream->runtime; 682 snd_pcm_stream_lock_irq(substream); 683 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 684 snd_pcm_stream_unlock_irq(substream); 685 return -EBADFD; 686 } 687 snd_pcm_stream_unlock_irq(substream); 688 if (channel >= runtime->channels) 689 return -EINVAL; 690 memset(info, 0, sizeof(*info)); 691 info->channel = channel; 692 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 693 } 694 695 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 696 struct snd_pcm_channel_info __user * _info) 697 { 698 struct snd_pcm_channel_info info; 699 int res; 700 701 if (copy_from_user(&info, _info, sizeof(info))) 702 return -EFAULT; 703 res = snd_pcm_channel_info(substream, &info); 704 if (res < 0) 705 return res; 706 if (copy_to_user(_info, &info, sizeof(info))) 707 return -EFAULT; 708 return 0; 709 } 710 711 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 712 { 713 struct snd_pcm_runtime *runtime = substream->runtime; 714 if (runtime->trigger_master == NULL) 715 return; 716 if (runtime->trigger_master == substream) { 717 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 718 } else { 719 snd_pcm_trigger_tstamp(runtime->trigger_master); 720 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 721 } 722 runtime->trigger_master = NULL; 723 } 724 725 struct action_ops { 726 int (*pre_action)(struct snd_pcm_substream *substream, int state); 727 int (*do_action)(struct snd_pcm_substream *substream, int state); 728 void (*undo_action)(struct snd_pcm_substream *substream, int state); 729 void (*post_action)(struct snd_pcm_substream *substream, int state); 730 }; 731 732 /* 733 * this functions is core for handling of linked stream 734 * Note: the stream state might be changed also on failure 735 * Note2: call with calling stream lock + link lock 736 */ 737 static int snd_pcm_action_group(struct action_ops *ops, 738 struct snd_pcm_substream *substream, 739 int state, int do_lock) 740 { 741 struct snd_pcm_substream *s = NULL; 742 struct snd_pcm_substream *s1; 743 int res = 0; 744 745 snd_pcm_group_for_each_entry(s, substream) { 746 if (do_lock && s != substream) 747 spin_lock_nested(&s->self_group.lock, 748 SINGLE_DEPTH_NESTING); 749 res = ops->pre_action(s, state); 750 if (res < 0) 751 goto _unlock; 752 } 753 snd_pcm_group_for_each_entry(s, substream) { 754 res = ops->do_action(s, state); 755 if (res < 0) { 756 if (ops->undo_action) { 757 snd_pcm_group_for_each_entry(s1, substream) { 758 if (s1 == s) /* failed stream */ 759 break; 760 ops->undo_action(s1, state); 761 } 762 } 763 s = NULL; /* unlock all */ 764 goto _unlock; 765 } 766 } 767 snd_pcm_group_for_each_entry(s, substream) { 768 ops->post_action(s, state); 769 } 770 _unlock: 771 if (do_lock) { 772 /* unlock streams */ 773 snd_pcm_group_for_each_entry(s1, substream) { 774 if (s1 != substream) 775 spin_unlock(&s1->self_group.lock); 776 if (s1 == s) /* end */ 777 break; 778 } 779 } 780 return res; 781 } 782 783 /* 784 * Note: call with stream lock 785 */ 786 static int snd_pcm_action_single(struct action_ops *ops, 787 struct snd_pcm_substream *substream, 788 int state) 789 { 790 int res; 791 792 res = ops->pre_action(substream, state); 793 if (res < 0) 794 return res; 795 res = ops->do_action(substream, state); 796 if (res == 0) 797 ops->post_action(substream, state); 798 else if (ops->undo_action) 799 ops->undo_action(substream, state); 800 return res; 801 } 802 803 /* 804 * Note: call with stream lock 805 */ 806 static int snd_pcm_action(struct action_ops *ops, 807 struct snd_pcm_substream *substream, 808 int state) 809 { 810 int res; 811 812 if (snd_pcm_stream_linked(substream)) { 813 if (!spin_trylock(&substream->group->lock)) { 814 spin_unlock(&substream->self_group.lock); 815 spin_lock(&substream->group->lock); 816 spin_lock(&substream->self_group.lock); 817 } 818 res = snd_pcm_action_group(ops, substream, state, 1); 819 spin_unlock(&substream->group->lock); 820 } else { 821 res = snd_pcm_action_single(ops, substream, state); 822 } 823 return res; 824 } 825 826 /* 827 * Note: don't use any locks before 828 */ 829 static int snd_pcm_action_lock_irq(struct action_ops *ops, 830 struct snd_pcm_substream *substream, 831 int state) 832 { 833 int res; 834 835 read_lock_irq(&snd_pcm_link_rwlock); 836 if (snd_pcm_stream_linked(substream)) { 837 spin_lock(&substream->group->lock); 838 spin_lock(&substream->self_group.lock); 839 res = snd_pcm_action_group(ops, substream, state, 1); 840 spin_unlock(&substream->self_group.lock); 841 spin_unlock(&substream->group->lock); 842 } else { 843 spin_lock(&substream->self_group.lock); 844 res = snd_pcm_action_single(ops, substream, state); 845 spin_unlock(&substream->self_group.lock); 846 } 847 read_unlock_irq(&snd_pcm_link_rwlock); 848 return res; 849 } 850 851 /* 852 */ 853 static int snd_pcm_action_nonatomic(struct action_ops *ops, 854 struct snd_pcm_substream *substream, 855 int state) 856 { 857 int res; 858 859 down_read(&snd_pcm_link_rwsem); 860 if (snd_pcm_stream_linked(substream)) 861 res = snd_pcm_action_group(ops, substream, state, 0); 862 else 863 res = snd_pcm_action_single(ops, substream, state); 864 up_read(&snd_pcm_link_rwsem); 865 return res; 866 } 867 868 /* 869 * start callbacks 870 */ 871 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 872 { 873 struct snd_pcm_runtime *runtime = substream->runtime; 874 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 875 return -EBADFD; 876 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 877 !snd_pcm_playback_data(substream)) 878 return -EPIPE; 879 runtime->trigger_master = substream; 880 return 0; 881 } 882 883 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 884 { 885 if (substream->runtime->trigger_master != substream) 886 return 0; 887 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 888 } 889 890 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 891 { 892 if (substream->runtime->trigger_master == substream) 893 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 894 } 895 896 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 897 { 898 struct snd_pcm_runtime *runtime = substream->runtime; 899 snd_pcm_trigger_tstamp(substream); 900 runtime->hw_ptr_jiffies = jiffies; 901 runtime->status->state = state; 902 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 903 runtime->silence_size > 0) 904 snd_pcm_playback_silence(substream, ULONG_MAX); 905 if (substream->timer) 906 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 907 &runtime->trigger_tstamp); 908 } 909 910 static struct action_ops snd_pcm_action_start = { 911 .pre_action = snd_pcm_pre_start, 912 .do_action = snd_pcm_do_start, 913 .undo_action = snd_pcm_undo_start, 914 .post_action = snd_pcm_post_start 915 }; 916 917 /** 918 * snd_pcm_start - start all linked streams 919 * @substream: the PCM substream instance 920 */ 921 int snd_pcm_start(struct snd_pcm_substream *substream) 922 { 923 return snd_pcm_action(&snd_pcm_action_start, substream, 924 SNDRV_PCM_STATE_RUNNING); 925 } 926 927 /* 928 * stop callbacks 929 */ 930 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 931 { 932 struct snd_pcm_runtime *runtime = substream->runtime; 933 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 934 return -EBADFD; 935 runtime->trigger_master = substream; 936 return 0; 937 } 938 939 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 940 { 941 if (substream->runtime->trigger_master == substream && 942 snd_pcm_running(substream)) 943 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 944 return 0; /* unconditonally stop all substreams */ 945 } 946 947 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 948 { 949 struct snd_pcm_runtime *runtime = substream->runtime; 950 if (runtime->status->state != state) { 951 snd_pcm_trigger_tstamp(substream); 952 if (substream->timer) 953 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 954 &runtime->trigger_tstamp); 955 runtime->status->state = state; 956 } 957 wake_up(&runtime->sleep); 958 wake_up(&runtime->tsleep); 959 } 960 961 static struct action_ops snd_pcm_action_stop = { 962 .pre_action = snd_pcm_pre_stop, 963 .do_action = snd_pcm_do_stop, 964 .post_action = snd_pcm_post_stop 965 }; 966 967 /** 968 * snd_pcm_stop - try to stop all running streams in the substream group 969 * @substream: the PCM substream instance 970 * @state: PCM state after stopping the stream 971 * 972 * The state of each stream is then changed to the given state unconditionally. 973 */ 974 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 975 { 976 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 977 } 978 979 EXPORT_SYMBOL(snd_pcm_stop); 980 981 /** 982 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 983 * @substream: the PCM substream 984 * 985 * After stopping, the state is changed to SETUP. 986 * Unlike snd_pcm_stop(), this affects only the given stream. 987 */ 988 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 989 { 990 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 991 SNDRV_PCM_STATE_SETUP); 992 } 993 994 /* 995 * pause callbacks 996 */ 997 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 998 { 999 struct snd_pcm_runtime *runtime = substream->runtime; 1000 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 1001 return -ENOSYS; 1002 if (push) { 1003 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 1004 return -EBADFD; 1005 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 1006 return -EBADFD; 1007 runtime->trigger_master = substream; 1008 return 0; 1009 } 1010 1011 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 1012 { 1013 if (substream->runtime->trigger_master != substream) 1014 return 0; 1015 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 1016 * a delta betwen the current jiffies, this gives a large enough 1017 * delta, effectively to skip the check once. 1018 */ 1019 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 1020 return substream->ops->trigger(substream, 1021 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 1022 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 1023 } 1024 1025 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1026 { 1027 if (substream->runtime->trigger_master == substream) 1028 substream->ops->trigger(substream, 1029 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1030 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1031 } 1032 1033 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1034 { 1035 struct snd_pcm_runtime *runtime = substream->runtime; 1036 snd_pcm_trigger_tstamp(substream); 1037 if (push) { 1038 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1039 if (substream->timer) 1040 snd_timer_notify(substream->timer, 1041 SNDRV_TIMER_EVENT_MPAUSE, 1042 &runtime->trigger_tstamp); 1043 wake_up(&runtime->sleep); 1044 wake_up(&runtime->tsleep); 1045 } else { 1046 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1047 if (substream->timer) 1048 snd_timer_notify(substream->timer, 1049 SNDRV_TIMER_EVENT_MCONTINUE, 1050 &runtime->trigger_tstamp); 1051 } 1052 } 1053 1054 static struct action_ops snd_pcm_action_pause = { 1055 .pre_action = snd_pcm_pre_pause, 1056 .do_action = snd_pcm_do_pause, 1057 .undo_action = snd_pcm_undo_pause, 1058 .post_action = snd_pcm_post_pause 1059 }; 1060 1061 /* 1062 * Push/release the pause for all linked streams. 1063 */ 1064 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1065 { 1066 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1067 } 1068 1069 #ifdef CONFIG_PM 1070 /* suspend */ 1071 1072 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1073 { 1074 struct snd_pcm_runtime *runtime = substream->runtime; 1075 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1076 return -EBUSY; 1077 runtime->trigger_master = substream; 1078 return 0; 1079 } 1080 1081 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1082 { 1083 struct snd_pcm_runtime *runtime = substream->runtime; 1084 if (runtime->trigger_master != substream) 1085 return 0; 1086 if (! snd_pcm_running(substream)) 1087 return 0; 1088 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1089 return 0; /* suspend unconditionally */ 1090 } 1091 1092 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1093 { 1094 struct snd_pcm_runtime *runtime = substream->runtime; 1095 snd_pcm_trigger_tstamp(substream); 1096 if (substream->timer) 1097 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1098 &runtime->trigger_tstamp); 1099 runtime->status->suspended_state = runtime->status->state; 1100 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1101 wake_up(&runtime->sleep); 1102 wake_up(&runtime->tsleep); 1103 } 1104 1105 static struct action_ops snd_pcm_action_suspend = { 1106 .pre_action = snd_pcm_pre_suspend, 1107 .do_action = snd_pcm_do_suspend, 1108 .post_action = snd_pcm_post_suspend 1109 }; 1110 1111 /** 1112 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1113 * @substream: the PCM substream 1114 * 1115 * After this call, all streams are changed to SUSPENDED state. 1116 */ 1117 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1118 { 1119 int err; 1120 unsigned long flags; 1121 1122 if (! substream) 1123 return 0; 1124 1125 snd_pcm_stream_lock_irqsave(substream, flags); 1126 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1127 snd_pcm_stream_unlock_irqrestore(substream, flags); 1128 return err; 1129 } 1130 1131 EXPORT_SYMBOL(snd_pcm_suspend); 1132 1133 /** 1134 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1135 * @pcm: the PCM instance 1136 * 1137 * After this call, all streams are changed to SUSPENDED state. 1138 */ 1139 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1140 { 1141 struct snd_pcm_substream *substream; 1142 int stream, err = 0; 1143 1144 if (! pcm) 1145 return 0; 1146 1147 for (stream = 0; stream < 2; stream++) { 1148 for (substream = pcm->streams[stream].substream; 1149 substream; substream = substream->next) { 1150 /* FIXME: the open/close code should lock this as well */ 1151 if (substream->runtime == NULL) 1152 continue; 1153 err = snd_pcm_suspend(substream); 1154 if (err < 0 && err != -EBUSY) 1155 return err; 1156 } 1157 } 1158 return 0; 1159 } 1160 1161 EXPORT_SYMBOL(snd_pcm_suspend_all); 1162 1163 /* resume */ 1164 1165 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1166 { 1167 struct snd_pcm_runtime *runtime = substream->runtime; 1168 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1169 return -ENOSYS; 1170 runtime->trigger_master = substream; 1171 return 0; 1172 } 1173 1174 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1175 { 1176 struct snd_pcm_runtime *runtime = substream->runtime; 1177 if (runtime->trigger_master != substream) 1178 return 0; 1179 /* DMA not running previously? */ 1180 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1181 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1182 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1183 return 0; 1184 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1185 } 1186 1187 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1188 { 1189 if (substream->runtime->trigger_master == substream && 1190 snd_pcm_running(substream)) 1191 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1192 } 1193 1194 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1195 { 1196 struct snd_pcm_runtime *runtime = substream->runtime; 1197 snd_pcm_trigger_tstamp(substream); 1198 if (substream->timer) 1199 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1200 &runtime->trigger_tstamp); 1201 runtime->status->state = runtime->status->suspended_state; 1202 } 1203 1204 static struct action_ops snd_pcm_action_resume = { 1205 .pre_action = snd_pcm_pre_resume, 1206 .do_action = snd_pcm_do_resume, 1207 .undo_action = snd_pcm_undo_resume, 1208 .post_action = snd_pcm_post_resume 1209 }; 1210 1211 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1212 { 1213 struct snd_card *card = substream->pcm->card; 1214 int res; 1215 1216 snd_power_lock(card); 1217 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1218 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1219 snd_power_unlock(card); 1220 return res; 1221 } 1222 1223 #else 1224 1225 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1226 { 1227 return -ENOSYS; 1228 } 1229 1230 #endif /* CONFIG_PM */ 1231 1232 /* 1233 * xrun ioctl 1234 * 1235 * Change the RUNNING stream(s) to XRUN state. 1236 */ 1237 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1238 { 1239 struct snd_card *card = substream->pcm->card; 1240 struct snd_pcm_runtime *runtime = substream->runtime; 1241 int result; 1242 1243 snd_power_lock(card); 1244 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1245 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1246 if (result < 0) 1247 goto _unlock; 1248 } 1249 1250 snd_pcm_stream_lock_irq(substream); 1251 switch (runtime->status->state) { 1252 case SNDRV_PCM_STATE_XRUN: 1253 result = 0; /* already there */ 1254 break; 1255 case SNDRV_PCM_STATE_RUNNING: 1256 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1257 break; 1258 default: 1259 result = -EBADFD; 1260 } 1261 snd_pcm_stream_unlock_irq(substream); 1262 _unlock: 1263 snd_power_unlock(card); 1264 return result; 1265 } 1266 1267 /* 1268 * reset ioctl 1269 */ 1270 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1271 { 1272 struct snd_pcm_runtime *runtime = substream->runtime; 1273 switch (runtime->status->state) { 1274 case SNDRV_PCM_STATE_RUNNING: 1275 case SNDRV_PCM_STATE_PREPARED: 1276 case SNDRV_PCM_STATE_PAUSED: 1277 case SNDRV_PCM_STATE_SUSPENDED: 1278 return 0; 1279 default: 1280 return -EBADFD; 1281 } 1282 } 1283 1284 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1285 { 1286 struct snd_pcm_runtime *runtime = substream->runtime; 1287 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1288 if (err < 0) 1289 return err; 1290 runtime->hw_ptr_base = 0; 1291 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1292 runtime->status->hw_ptr % runtime->period_size; 1293 runtime->silence_start = runtime->status->hw_ptr; 1294 runtime->silence_filled = 0; 1295 return 0; 1296 } 1297 1298 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1299 { 1300 struct snd_pcm_runtime *runtime = substream->runtime; 1301 runtime->control->appl_ptr = runtime->status->hw_ptr; 1302 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1303 runtime->silence_size > 0) 1304 snd_pcm_playback_silence(substream, ULONG_MAX); 1305 } 1306 1307 static struct action_ops snd_pcm_action_reset = { 1308 .pre_action = snd_pcm_pre_reset, 1309 .do_action = snd_pcm_do_reset, 1310 .post_action = snd_pcm_post_reset 1311 }; 1312 1313 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1314 { 1315 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1316 } 1317 1318 /* 1319 * prepare ioctl 1320 */ 1321 /* we use the second argument for updating f_flags */ 1322 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1323 int f_flags) 1324 { 1325 struct snd_pcm_runtime *runtime = substream->runtime; 1326 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1327 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1328 return -EBADFD; 1329 if (snd_pcm_running(substream)) 1330 return -EBUSY; 1331 substream->f_flags = f_flags; 1332 return 0; 1333 } 1334 1335 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1336 { 1337 int err; 1338 err = substream->ops->prepare(substream); 1339 if (err < 0) 1340 return err; 1341 return snd_pcm_do_reset(substream, 0); 1342 } 1343 1344 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1345 { 1346 struct snd_pcm_runtime *runtime = substream->runtime; 1347 runtime->control->appl_ptr = runtime->status->hw_ptr; 1348 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1349 } 1350 1351 static struct action_ops snd_pcm_action_prepare = { 1352 .pre_action = snd_pcm_pre_prepare, 1353 .do_action = snd_pcm_do_prepare, 1354 .post_action = snd_pcm_post_prepare 1355 }; 1356 1357 /** 1358 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1359 * @substream: the PCM substream instance 1360 * @file: file to refer f_flags 1361 */ 1362 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1363 struct file *file) 1364 { 1365 int res; 1366 struct snd_card *card = substream->pcm->card; 1367 int f_flags; 1368 1369 if (file) 1370 f_flags = file->f_flags; 1371 else 1372 f_flags = substream->f_flags; 1373 1374 snd_power_lock(card); 1375 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1376 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1377 substream, f_flags); 1378 snd_power_unlock(card); 1379 return res; 1380 } 1381 1382 /* 1383 * drain ioctl 1384 */ 1385 1386 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1387 { 1388 substream->runtime->trigger_master = substream; 1389 return 0; 1390 } 1391 1392 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1393 { 1394 struct snd_pcm_runtime *runtime = substream->runtime; 1395 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1396 switch (runtime->status->state) { 1397 case SNDRV_PCM_STATE_PREPARED: 1398 /* start playback stream if possible */ 1399 if (! snd_pcm_playback_empty(substream)) { 1400 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1401 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1402 } 1403 break; 1404 case SNDRV_PCM_STATE_RUNNING: 1405 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1406 break; 1407 default: 1408 break; 1409 } 1410 } else { 1411 /* stop running stream */ 1412 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1413 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1414 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1415 snd_pcm_do_stop(substream, new_state); 1416 snd_pcm_post_stop(substream, new_state); 1417 } 1418 } 1419 return 0; 1420 } 1421 1422 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1423 { 1424 } 1425 1426 static struct action_ops snd_pcm_action_drain_init = { 1427 .pre_action = snd_pcm_pre_drain_init, 1428 .do_action = snd_pcm_do_drain_init, 1429 .post_action = snd_pcm_post_drain_init 1430 }; 1431 1432 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1433 1434 /* 1435 * Drain the stream(s). 1436 * When the substream is linked, sync until the draining of all playback streams 1437 * is finished. 1438 * After this call, all streams are supposed to be either SETUP or DRAINING 1439 * (capture only) state. 1440 */ 1441 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1442 struct file *file) 1443 { 1444 struct snd_card *card; 1445 struct snd_pcm_runtime *runtime; 1446 struct snd_pcm_substream *s; 1447 wait_queue_t wait; 1448 int result = 0; 1449 int nonblock = 0; 1450 1451 card = substream->pcm->card; 1452 runtime = substream->runtime; 1453 1454 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1455 return -EBADFD; 1456 1457 snd_power_lock(card); 1458 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1459 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1460 if (result < 0) { 1461 snd_power_unlock(card); 1462 return result; 1463 } 1464 } 1465 1466 if (file) { 1467 if (file->f_flags & O_NONBLOCK) 1468 nonblock = 1; 1469 } else if (substream->f_flags & O_NONBLOCK) 1470 nonblock = 1; 1471 1472 down_read(&snd_pcm_link_rwsem); 1473 snd_pcm_stream_lock_irq(substream); 1474 /* resume pause */ 1475 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1476 snd_pcm_pause(substream, 0); 1477 1478 /* pre-start/stop - all running streams are changed to DRAINING state */ 1479 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1480 if (result < 0) 1481 goto unlock; 1482 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1483 if (nonblock) { 1484 result = -EAGAIN; 1485 goto unlock; 1486 } 1487 1488 for (;;) { 1489 long tout; 1490 struct snd_pcm_runtime *to_check; 1491 if (signal_pending(current)) { 1492 result = -ERESTARTSYS; 1493 break; 1494 } 1495 /* find a substream to drain */ 1496 to_check = NULL; 1497 snd_pcm_group_for_each_entry(s, substream) { 1498 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1499 continue; 1500 runtime = s->runtime; 1501 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1502 to_check = runtime; 1503 break; 1504 } 1505 } 1506 if (!to_check) 1507 break; /* all drained */ 1508 init_waitqueue_entry(&wait, current); 1509 add_wait_queue(&to_check->sleep, &wait); 1510 set_current_state(TASK_INTERRUPTIBLE); 1511 snd_pcm_stream_unlock_irq(substream); 1512 up_read(&snd_pcm_link_rwsem); 1513 snd_power_unlock(card); 1514 tout = schedule_timeout(10 * HZ); 1515 snd_power_lock(card); 1516 down_read(&snd_pcm_link_rwsem); 1517 snd_pcm_stream_lock_irq(substream); 1518 remove_wait_queue(&to_check->sleep, &wait); 1519 if (tout == 0) { 1520 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1521 result = -ESTRPIPE; 1522 else { 1523 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1524 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1525 result = -EIO; 1526 } 1527 break; 1528 } 1529 } 1530 1531 unlock: 1532 snd_pcm_stream_unlock_irq(substream); 1533 up_read(&snd_pcm_link_rwsem); 1534 snd_power_unlock(card); 1535 1536 return result; 1537 } 1538 1539 /* 1540 * drop ioctl 1541 * 1542 * Immediately put all linked substreams into SETUP state. 1543 */ 1544 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1545 { 1546 struct snd_pcm_runtime *runtime; 1547 struct snd_card *card; 1548 int result = 0; 1549 1550 if (PCM_RUNTIME_CHECK(substream)) 1551 return -ENXIO; 1552 runtime = substream->runtime; 1553 card = substream->pcm->card; 1554 1555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1556 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1557 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1558 return -EBADFD; 1559 1560 snd_pcm_stream_lock_irq(substream); 1561 /* resume pause */ 1562 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1563 snd_pcm_pause(substream, 0); 1564 1565 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1567 snd_pcm_stream_unlock_irq(substream); 1568 1569 return result; 1570 } 1571 1572 1573 /* WARNING: Don't forget to fput back the file */ 1574 static struct file *snd_pcm_file_fd(int fd) 1575 { 1576 struct file *file; 1577 struct inode *inode; 1578 unsigned int minor; 1579 1580 file = fget(fd); 1581 if (!file) 1582 return NULL; 1583 inode = file->f_path.dentry->d_inode; 1584 if (!S_ISCHR(inode->i_mode) || 1585 imajor(inode) != snd_major) { 1586 fput(file); 1587 return NULL; 1588 } 1589 minor = iminor(inode); 1590 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1591 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1592 fput(file); 1593 return NULL; 1594 } 1595 return file; 1596 } 1597 1598 /* 1599 * PCM link handling 1600 */ 1601 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1602 { 1603 int res = 0; 1604 struct file *file; 1605 struct snd_pcm_file *pcm_file; 1606 struct snd_pcm_substream *substream1; 1607 1608 file = snd_pcm_file_fd(fd); 1609 if (!file) 1610 return -EBADFD; 1611 pcm_file = file->private_data; 1612 substream1 = pcm_file->substream; 1613 down_write(&snd_pcm_link_rwsem); 1614 write_lock_irq(&snd_pcm_link_rwlock); 1615 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1616 substream->runtime->status->state != substream1->runtime->status->state) { 1617 res = -EBADFD; 1618 goto _end; 1619 } 1620 if (snd_pcm_stream_linked(substream1)) { 1621 res = -EALREADY; 1622 goto _end; 1623 } 1624 if (!snd_pcm_stream_linked(substream)) { 1625 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1626 if (substream->group == NULL) { 1627 res = -ENOMEM; 1628 goto _end; 1629 } 1630 spin_lock_init(&substream->group->lock); 1631 INIT_LIST_HEAD(&substream->group->substreams); 1632 list_add_tail(&substream->link_list, &substream->group->substreams); 1633 substream->group->count = 1; 1634 } 1635 list_add_tail(&substream1->link_list, &substream->group->substreams); 1636 substream->group->count++; 1637 substream1->group = substream->group; 1638 _end: 1639 write_unlock_irq(&snd_pcm_link_rwlock); 1640 up_write(&snd_pcm_link_rwsem); 1641 fput(file); 1642 return res; 1643 } 1644 1645 static void relink_to_local(struct snd_pcm_substream *substream) 1646 { 1647 substream->group = &substream->self_group; 1648 INIT_LIST_HEAD(&substream->self_group.substreams); 1649 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1650 } 1651 1652 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1653 { 1654 struct snd_pcm_substream *s; 1655 int res = 0; 1656 1657 down_write(&snd_pcm_link_rwsem); 1658 write_lock_irq(&snd_pcm_link_rwlock); 1659 if (!snd_pcm_stream_linked(substream)) { 1660 res = -EALREADY; 1661 goto _end; 1662 } 1663 list_del(&substream->link_list); 1664 substream->group->count--; 1665 if (substream->group->count == 1) { /* detach the last stream, too */ 1666 snd_pcm_group_for_each_entry(s, substream) { 1667 relink_to_local(s); 1668 break; 1669 } 1670 kfree(substream->group); 1671 } 1672 relink_to_local(substream); 1673 _end: 1674 write_unlock_irq(&snd_pcm_link_rwlock); 1675 up_write(&snd_pcm_link_rwsem); 1676 return res; 1677 } 1678 1679 /* 1680 * hw configurator 1681 */ 1682 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1683 struct snd_pcm_hw_rule *rule) 1684 { 1685 struct snd_interval t; 1686 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1687 hw_param_interval_c(params, rule->deps[1]), &t); 1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1689 } 1690 1691 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1692 struct snd_pcm_hw_rule *rule) 1693 { 1694 struct snd_interval t; 1695 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1696 hw_param_interval_c(params, rule->deps[1]), &t); 1697 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1698 } 1699 1700 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1701 struct snd_pcm_hw_rule *rule) 1702 { 1703 struct snd_interval t; 1704 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1705 hw_param_interval_c(params, rule->deps[1]), 1706 (unsigned long) rule->private, &t); 1707 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1708 } 1709 1710 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1711 struct snd_pcm_hw_rule *rule) 1712 { 1713 struct snd_interval t; 1714 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1715 (unsigned long) rule->private, 1716 hw_param_interval_c(params, rule->deps[1]), &t); 1717 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1718 } 1719 1720 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1721 struct snd_pcm_hw_rule *rule) 1722 { 1723 unsigned int k; 1724 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1725 struct snd_mask m; 1726 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1727 snd_mask_any(&m); 1728 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1729 int bits; 1730 if (! snd_mask_test(mask, k)) 1731 continue; 1732 bits = snd_pcm_format_physical_width(k); 1733 if (bits <= 0) 1734 continue; /* ignore invalid formats */ 1735 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1736 snd_mask_reset(&m, k); 1737 } 1738 return snd_mask_refine(mask, &m); 1739 } 1740 1741 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1742 struct snd_pcm_hw_rule *rule) 1743 { 1744 struct snd_interval t; 1745 unsigned int k; 1746 t.min = UINT_MAX; 1747 t.max = 0; 1748 t.openmin = 0; 1749 t.openmax = 0; 1750 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1751 int bits; 1752 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1753 continue; 1754 bits = snd_pcm_format_physical_width(k); 1755 if (bits <= 0) 1756 continue; /* ignore invalid formats */ 1757 if (t.min > (unsigned)bits) 1758 t.min = bits; 1759 if (t.max < (unsigned)bits) 1760 t.max = bits; 1761 } 1762 t.integer = 1; 1763 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1764 } 1765 1766 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1767 #error "Change this table" 1768 #endif 1769 1770 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1771 48000, 64000, 88200, 96000, 176400, 192000 }; 1772 1773 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1774 .count = ARRAY_SIZE(rates), 1775 .list = rates, 1776 }; 1777 1778 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1779 struct snd_pcm_hw_rule *rule) 1780 { 1781 struct snd_pcm_hardware *hw = rule->private; 1782 return snd_interval_list(hw_param_interval(params, rule->var), 1783 snd_pcm_known_rates.count, 1784 snd_pcm_known_rates.list, hw->rates); 1785 } 1786 1787 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1788 struct snd_pcm_hw_rule *rule) 1789 { 1790 struct snd_interval t; 1791 struct snd_pcm_substream *substream = rule->private; 1792 t.min = 0; 1793 t.max = substream->buffer_bytes_max; 1794 t.openmin = 0; 1795 t.openmax = 0; 1796 t.integer = 1; 1797 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1798 } 1799 1800 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1801 { 1802 struct snd_pcm_runtime *runtime = substream->runtime; 1803 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1804 int k, err; 1805 1806 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1807 snd_mask_any(constrs_mask(constrs, k)); 1808 } 1809 1810 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1811 snd_interval_any(constrs_interval(constrs, k)); 1812 } 1813 1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1817 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1818 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1819 1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1821 snd_pcm_hw_rule_format, NULL, 1822 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1823 if (err < 0) 1824 return err; 1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1826 snd_pcm_hw_rule_sample_bits, NULL, 1827 SNDRV_PCM_HW_PARAM_FORMAT, 1828 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1829 if (err < 0) 1830 return err; 1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1832 snd_pcm_hw_rule_div, NULL, 1833 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1834 if (err < 0) 1835 return err; 1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1837 snd_pcm_hw_rule_mul, NULL, 1838 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1839 if (err < 0) 1840 return err; 1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1842 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1843 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1844 if (err < 0) 1845 return err; 1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1847 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1848 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1849 if (err < 0) 1850 return err; 1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1852 snd_pcm_hw_rule_div, NULL, 1853 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1854 if (err < 0) 1855 return err; 1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1857 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1858 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1859 if (err < 0) 1860 return err; 1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1862 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1864 if (err < 0) 1865 return err; 1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1867 snd_pcm_hw_rule_div, NULL, 1868 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1869 if (err < 0) 1870 return err; 1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1872 snd_pcm_hw_rule_div, NULL, 1873 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1874 if (err < 0) 1875 return err; 1876 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1877 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1878 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1879 if (err < 0) 1880 return err; 1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1882 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1883 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1884 if (err < 0) 1885 return err; 1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1887 snd_pcm_hw_rule_mul, NULL, 1888 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1889 if (err < 0) 1890 return err; 1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1892 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1893 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1894 if (err < 0) 1895 return err; 1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1897 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1898 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1899 if (err < 0) 1900 return err; 1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1902 snd_pcm_hw_rule_muldivk, (void*) 8, 1903 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1904 if (err < 0) 1905 return err; 1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1907 snd_pcm_hw_rule_muldivk, (void*) 8, 1908 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1909 if (err < 0) 1910 return err; 1911 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1912 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1913 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1914 if (err < 0) 1915 return err; 1916 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1917 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1918 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1919 if (err < 0) 1920 return err; 1921 return 0; 1922 } 1923 1924 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1925 { 1926 struct snd_pcm_runtime *runtime = substream->runtime; 1927 struct snd_pcm_hardware *hw = &runtime->hw; 1928 int err; 1929 unsigned int mask = 0; 1930 1931 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1932 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1933 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1934 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1935 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1936 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1938 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1940 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1941 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1942 } 1943 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1944 if (err < 0) 1945 return err; 1946 1947 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1948 if (err < 0) 1949 return err; 1950 1951 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1952 if (err < 0) 1953 return err; 1954 1955 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1956 hw->channels_min, hw->channels_max); 1957 if (err < 0) 1958 return err; 1959 1960 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1961 hw->rate_min, hw->rate_max); 1962 if (err < 0) 1963 return err; 1964 1965 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1966 hw->period_bytes_min, hw->period_bytes_max); 1967 if (err < 0) 1968 return err; 1969 1970 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1971 hw->periods_min, hw->periods_max); 1972 if (err < 0) 1973 return err; 1974 1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1976 hw->period_bytes_min, hw->buffer_bytes_max); 1977 if (err < 0) 1978 return err; 1979 1980 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1981 snd_pcm_hw_rule_buffer_bytes_max, substream, 1982 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1983 if (err < 0) 1984 return err; 1985 1986 /* FIXME: remove */ 1987 if (runtime->dma_bytes) { 1988 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1989 if (err < 0) 1990 return -EINVAL; 1991 } 1992 1993 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1994 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1995 snd_pcm_hw_rule_rate, hw, 1996 SNDRV_PCM_HW_PARAM_RATE, -1); 1997 if (err < 0) 1998 return err; 1999 } 2000 2001 /* FIXME: this belong to lowlevel */ 2002 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2003 2004 return 0; 2005 } 2006 2007 static void pcm_release_private(struct snd_pcm_substream *substream) 2008 { 2009 snd_pcm_unlink(substream); 2010 } 2011 2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2013 { 2014 substream->ref_count--; 2015 if (substream->ref_count > 0) 2016 return; 2017 2018 snd_pcm_drop(substream); 2019 if (substream->hw_opened) { 2020 if (substream->ops->hw_free != NULL) 2021 substream->ops->hw_free(substream); 2022 substream->ops->close(substream); 2023 substream->hw_opened = 0; 2024 } 2025 if (substream->pcm_release) { 2026 substream->pcm_release(substream); 2027 substream->pcm_release = NULL; 2028 } 2029 snd_pcm_detach_substream(substream); 2030 } 2031 2032 EXPORT_SYMBOL(snd_pcm_release_substream); 2033 2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2035 struct file *file, 2036 struct snd_pcm_substream **rsubstream) 2037 { 2038 struct snd_pcm_substream *substream; 2039 int err; 2040 2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2042 if (err < 0) 2043 return err; 2044 if (substream->ref_count > 1) { 2045 *rsubstream = substream; 2046 return 0; 2047 } 2048 2049 err = snd_pcm_hw_constraints_init(substream); 2050 if (err < 0) { 2051 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2052 goto error; 2053 } 2054 2055 if ((err = substream->ops->open(substream)) < 0) 2056 goto error; 2057 2058 substream->hw_opened = 1; 2059 2060 err = snd_pcm_hw_constraints_complete(substream); 2061 if (err < 0) { 2062 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2063 goto error; 2064 } 2065 2066 *rsubstream = substream; 2067 return 0; 2068 2069 error: 2070 snd_pcm_release_substream(substream); 2071 return err; 2072 } 2073 2074 EXPORT_SYMBOL(snd_pcm_open_substream); 2075 2076 static int snd_pcm_open_file(struct file *file, 2077 struct snd_pcm *pcm, 2078 int stream, 2079 struct snd_pcm_file **rpcm_file) 2080 { 2081 struct snd_pcm_file *pcm_file; 2082 struct snd_pcm_substream *substream; 2083 struct snd_pcm_str *str; 2084 int err; 2085 2086 if (rpcm_file) 2087 *rpcm_file = NULL; 2088 2089 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2090 if (err < 0) 2091 return err; 2092 2093 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2094 if (pcm_file == NULL) { 2095 snd_pcm_release_substream(substream); 2096 return -ENOMEM; 2097 } 2098 pcm_file->substream = substream; 2099 if (substream->ref_count == 1) { 2100 str = substream->pstr; 2101 substream->file = pcm_file; 2102 substream->pcm_release = pcm_release_private; 2103 } 2104 file->private_data = pcm_file; 2105 if (rpcm_file) 2106 *rpcm_file = pcm_file; 2107 return 0; 2108 } 2109 2110 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2111 { 2112 struct snd_pcm *pcm; 2113 2114 pcm = snd_lookup_minor_data(iminor(inode), 2115 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2116 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2117 } 2118 2119 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2120 { 2121 struct snd_pcm *pcm; 2122 2123 pcm = snd_lookup_minor_data(iminor(inode), 2124 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2125 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2126 } 2127 2128 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2129 { 2130 int err; 2131 struct snd_pcm_file *pcm_file; 2132 wait_queue_t wait; 2133 2134 if (pcm == NULL) { 2135 err = -ENODEV; 2136 goto __error1; 2137 } 2138 err = snd_card_file_add(pcm->card, file); 2139 if (err < 0) 2140 goto __error1; 2141 if (!try_module_get(pcm->card->module)) { 2142 err = -EFAULT; 2143 goto __error2; 2144 } 2145 init_waitqueue_entry(&wait, current); 2146 add_wait_queue(&pcm->open_wait, &wait); 2147 mutex_lock(&pcm->open_mutex); 2148 while (1) { 2149 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2150 if (err >= 0) 2151 break; 2152 if (err == -EAGAIN) { 2153 if (file->f_flags & O_NONBLOCK) { 2154 err = -EBUSY; 2155 break; 2156 } 2157 } else 2158 break; 2159 set_current_state(TASK_INTERRUPTIBLE); 2160 mutex_unlock(&pcm->open_mutex); 2161 schedule(); 2162 mutex_lock(&pcm->open_mutex); 2163 if (signal_pending(current)) { 2164 err = -ERESTARTSYS; 2165 break; 2166 } 2167 } 2168 remove_wait_queue(&pcm->open_wait, &wait); 2169 mutex_unlock(&pcm->open_mutex); 2170 if (err < 0) 2171 goto __error; 2172 return err; 2173 2174 __error: 2175 module_put(pcm->card->module); 2176 __error2: 2177 snd_card_file_remove(pcm->card, file); 2178 __error1: 2179 return err; 2180 } 2181 2182 static int snd_pcm_release(struct inode *inode, struct file *file) 2183 { 2184 struct snd_pcm *pcm; 2185 struct snd_pcm_substream *substream; 2186 struct snd_pcm_file *pcm_file; 2187 2188 pcm_file = file->private_data; 2189 substream = pcm_file->substream; 2190 if (snd_BUG_ON(!substream)) 2191 return -ENXIO; 2192 pcm = substream->pcm; 2193 mutex_lock(&pcm->open_mutex); 2194 snd_pcm_release_substream(substream); 2195 kfree(pcm_file); 2196 mutex_unlock(&pcm->open_mutex); 2197 wake_up(&pcm->open_wait); 2198 module_put(pcm->card->module); 2199 snd_card_file_remove(pcm->card, file); 2200 return 0; 2201 } 2202 2203 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2204 snd_pcm_uframes_t frames) 2205 { 2206 struct snd_pcm_runtime *runtime = substream->runtime; 2207 snd_pcm_sframes_t appl_ptr; 2208 snd_pcm_sframes_t ret; 2209 snd_pcm_sframes_t hw_avail; 2210 2211 if (frames == 0) 2212 return 0; 2213 2214 snd_pcm_stream_lock_irq(substream); 2215 switch (runtime->status->state) { 2216 case SNDRV_PCM_STATE_PREPARED: 2217 break; 2218 case SNDRV_PCM_STATE_DRAINING: 2219 case SNDRV_PCM_STATE_RUNNING: 2220 if (snd_pcm_update_hw_ptr(substream) >= 0) 2221 break; 2222 /* Fall through */ 2223 case SNDRV_PCM_STATE_XRUN: 2224 ret = -EPIPE; 2225 goto __end; 2226 case SNDRV_PCM_STATE_SUSPENDED: 2227 ret = -ESTRPIPE; 2228 goto __end; 2229 default: 2230 ret = -EBADFD; 2231 goto __end; 2232 } 2233 2234 hw_avail = snd_pcm_playback_hw_avail(runtime); 2235 if (hw_avail <= 0) { 2236 ret = 0; 2237 goto __end; 2238 } 2239 if (frames > (snd_pcm_uframes_t)hw_avail) 2240 frames = hw_avail; 2241 appl_ptr = runtime->control->appl_ptr - frames; 2242 if (appl_ptr < 0) 2243 appl_ptr += runtime->boundary; 2244 runtime->control->appl_ptr = appl_ptr; 2245 ret = frames; 2246 __end: 2247 snd_pcm_stream_unlock_irq(substream); 2248 return ret; 2249 } 2250 2251 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2252 snd_pcm_uframes_t frames) 2253 { 2254 struct snd_pcm_runtime *runtime = substream->runtime; 2255 snd_pcm_sframes_t appl_ptr; 2256 snd_pcm_sframes_t ret; 2257 snd_pcm_sframes_t hw_avail; 2258 2259 if (frames == 0) 2260 return 0; 2261 2262 snd_pcm_stream_lock_irq(substream); 2263 switch (runtime->status->state) { 2264 case SNDRV_PCM_STATE_PREPARED: 2265 case SNDRV_PCM_STATE_DRAINING: 2266 break; 2267 case SNDRV_PCM_STATE_RUNNING: 2268 if (snd_pcm_update_hw_ptr(substream) >= 0) 2269 break; 2270 /* Fall through */ 2271 case SNDRV_PCM_STATE_XRUN: 2272 ret = -EPIPE; 2273 goto __end; 2274 case SNDRV_PCM_STATE_SUSPENDED: 2275 ret = -ESTRPIPE; 2276 goto __end; 2277 default: 2278 ret = -EBADFD; 2279 goto __end; 2280 } 2281 2282 hw_avail = snd_pcm_capture_hw_avail(runtime); 2283 if (hw_avail <= 0) { 2284 ret = 0; 2285 goto __end; 2286 } 2287 if (frames > (snd_pcm_uframes_t)hw_avail) 2288 frames = hw_avail; 2289 appl_ptr = runtime->control->appl_ptr - frames; 2290 if (appl_ptr < 0) 2291 appl_ptr += runtime->boundary; 2292 runtime->control->appl_ptr = appl_ptr; 2293 ret = frames; 2294 __end: 2295 snd_pcm_stream_unlock_irq(substream); 2296 return ret; 2297 } 2298 2299 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2300 snd_pcm_uframes_t frames) 2301 { 2302 struct snd_pcm_runtime *runtime = substream->runtime; 2303 snd_pcm_sframes_t appl_ptr; 2304 snd_pcm_sframes_t ret; 2305 snd_pcm_sframes_t avail; 2306 2307 if (frames == 0) 2308 return 0; 2309 2310 snd_pcm_stream_lock_irq(substream); 2311 switch (runtime->status->state) { 2312 case SNDRV_PCM_STATE_PREPARED: 2313 case SNDRV_PCM_STATE_PAUSED: 2314 break; 2315 case SNDRV_PCM_STATE_DRAINING: 2316 case SNDRV_PCM_STATE_RUNNING: 2317 if (snd_pcm_update_hw_ptr(substream) >= 0) 2318 break; 2319 /* Fall through */ 2320 case SNDRV_PCM_STATE_XRUN: 2321 ret = -EPIPE; 2322 goto __end; 2323 case SNDRV_PCM_STATE_SUSPENDED: 2324 ret = -ESTRPIPE; 2325 goto __end; 2326 default: 2327 ret = -EBADFD; 2328 goto __end; 2329 } 2330 2331 avail = snd_pcm_playback_avail(runtime); 2332 if (avail <= 0) { 2333 ret = 0; 2334 goto __end; 2335 } 2336 if (frames > (snd_pcm_uframes_t)avail) 2337 frames = avail; 2338 appl_ptr = runtime->control->appl_ptr + frames; 2339 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2340 appl_ptr -= runtime->boundary; 2341 runtime->control->appl_ptr = appl_ptr; 2342 ret = frames; 2343 __end: 2344 snd_pcm_stream_unlock_irq(substream); 2345 return ret; 2346 } 2347 2348 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2349 snd_pcm_uframes_t frames) 2350 { 2351 struct snd_pcm_runtime *runtime = substream->runtime; 2352 snd_pcm_sframes_t appl_ptr; 2353 snd_pcm_sframes_t ret; 2354 snd_pcm_sframes_t avail; 2355 2356 if (frames == 0) 2357 return 0; 2358 2359 snd_pcm_stream_lock_irq(substream); 2360 switch (runtime->status->state) { 2361 case SNDRV_PCM_STATE_PREPARED: 2362 case SNDRV_PCM_STATE_DRAINING: 2363 case SNDRV_PCM_STATE_PAUSED: 2364 break; 2365 case SNDRV_PCM_STATE_RUNNING: 2366 if (snd_pcm_update_hw_ptr(substream) >= 0) 2367 break; 2368 /* Fall through */ 2369 case SNDRV_PCM_STATE_XRUN: 2370 ret = -EPIPE; 2371 goto __end; 2372 case SNDRV_PCM_STATE_SUSPENDED: 2373 ret = -ESTRPIPE; 2374 goto __end; 2375 default: 2376 ret = -EBADFD; 2377 goto __end; 2378 } 2379 2380 avail = snd_pcm_capture_avail(runtime); 2381 if (avail <= 0) { 2382 ret = 0; 2383 goto __end; 2384 } 2385 if (frames > (snd_pcm_uframes_t)avail) 2386 frames = avail; 2387 appl_ptr = runtime->control->appl_ptr + frames; 2388 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2389 appl_ptr -= runtime->boundary; 2390 runtime->control->appl_ptr = appl_ptr; 2391 ret = frames; 2392 __end: 2393 snd_pcm_stream_unlock_irq(substream); 2394 return ret; 2395 } 2396 2397 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2398 { 2399 struct snd_pcm_runtime *runtime = substream->runtime; 2400 int err; 2401 2402 snd_pcm_stream_lock_irq(substream); 2403 switch (runtime->status->state) { 2404 case SNDRV_PCM_STATE_DRAINING: 2405 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2406 goto __badfd; 2407 case SNDRV_PCM_STATE_RUNNING: 2408 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2409 break; 2410 /* Fall through */ 2411 case SNDRV_PCM_STATE_PREPARED: 2412 case SNDRV_PCM_STATE_SUSPENDED: 2413 err = 0; 2414 break; 2415 case SNDRV_PCM_STATE_XRUN: 2416 err = -EPIPE; 2417 break; 2418 default: 2419 __badfd: 2420 err = -EBADFD; 2421 break; 2422 } 2423 snd_pcm_stream_unlock_irq(substream); 2424 return err; 2425 } 2426 2427 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2428 snd_pcm_sframes_t __user *res) 2429 { 2430 struct snd_pcm_runtime *runtime = substream->runtime; 2431 int err; 2432 snd_pcm_sframes_t n = 0; 2433 2434 snd_pcm_stream_lock_irq(substream); 2435 switch (runtime->status->state) { 2436 case SNDRV_PCM_STATE_DRAINING: 2437 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2438 goto __badfd; 2439 case SNDRV_PCM_STATE_RUNNING: 2440 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2441 break; 2442 /* Fall through */ 2443 case SNDRV_PCM_STATE_PREPARED: 2444 case SNDRV_PCM_STATE_SUSPENDED: 2445 err = 0; 2446 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2447 n = snd_pcm_playback_hw_avail(runtime); 2448 else 2449 n = snd_pcm_capture_avail(runtime); 2450 n += runtime->delay; 2451 break; 2452 case SNDRV_PCM_STATE_XRUN: 2453 err = -EPIPE; 2454 break; 2455 default: 2456 __badfd: 2457 err = -EBADFD; 2458 break; 2459 } 2460 snd_pcm_stream_unlock_irq(substream); 2461 if (!err) 2462 if (put_user(n, res)) 2463 err = -EFAULT; 2464 return err; 2465 } 2466 2467 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2468 struct snd_pcm_sync_ptr __user *_sync_ptr) 2469 { 2470 struct snd_pcm_runtime *runtime = substream->runtime; 2471 struct snd_pcm_sync_ptr sync_ptr; 2472 volatile struct snd_pcm_mmap_status *status; 2473 volatile struct snd_pcm_mmap_control *control; 2474 int err; 2475 2476 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2477 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2478 return -EFAULT; 2479 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2480 return -EFAULT; 2481 status = runtime->status; 2482 control = runtime->control; 2483 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2484 err = snd_pcm_hwsync(substream); 2485 if (err < 0) 2486 return err; 2487 } 2488 snd_pcm_stream_lock_irq(substream); 2489 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2490 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2491 else 2492 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2493 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2494 control->avail_min = sync_ptr.c.control.avail_min; 2495 else 2496 sync_ptr.c.control.avail_min = control->avail_min; 2497 sync_ptr.s.status.state = status->state; 2498 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2499 sync_ptr.s.status.tstamp = status->tstamp; 2500 sync_ptr.s.status.suspended_state = status->suspended_state; 2501 snd_pcm_stream_unlock_irq(substream); 2502 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2503 return -EFAULT; 2504 return 0; 2505 } 2506 2507 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2508 { 2509 struct snd_pcm_runtime *runtime = substream->runtime; 2510 int arg; 2511 2512 if (get_user(arg, _arg)) 2513 return -EFAULT; 2514 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2515 return -EINVAL; 2516 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2517 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2518 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2519 return 0; 2520 } 2521 2522 static int snd_pcm_common_ioctl1(struct file *file, 2523 struct snd_pcm_substream *substream, 2524 unsigned int cmd, void __user *arg) 2525 { 2526 switch (cmd) { 2527 case SNDRV_PCM_IOCTL_PVERSION: 2528 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2529 case SNDRV_PCM_IOCTL_INFO: 2530 return snd_pcm_info_user(substream, arg); 2531 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2532 return 0; 2533 case SNDRV_PCM_IOCTL_TTSTAMP: 2534 return snd_pcm_tstamp(substream, arg); 2535 case SNDRV_PCM_IOCTL_HW_REFINE: 2536 return snd_pcm_hw_refine_user(substream, arg); 2537 case SNDRV_PCM_IOCTL_HW_PARAMS: 2538 return snd_pcm_hw_params_user(substream, arg); 2539 case SNDRV_PCM_IOCTL_HW_FREE: 2540 return snd_pcm_hw_free(substream); 2541 case SNDRV_PCM_IOCTL_SW_PARAMS: 2542 return snd_pcm_sw_params_user(substream, arg); 2543 case SNDRV_PCM_IOCTL_STATUS: 2544 return snd_pcm_status_user(substream, arg); 2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2546 return snd_pcm_channel_info_user(substream, arg); 2547 case SNDRV_PCM_IOCTL_PREPARE: 2548 return snd_pcm_prepare(substream, file); 2549 case SNDRV_PCM_IOCTL_RESET: 2550 return snd_pcm_reset(substream); 2551 case SNDRV_PCM_IOCTL_START: 2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2553 case SNDRV_PCM_IOCTL_LINK: 2554 return snd_pcm_link(substream, (int)(unsigned long) arg); 2555 case SNDRV_PCM_IOCTL_UNLINK: 2556 return snd_pcm_unlink(substream); 2557 case SNDRV_PCM_IOCTL_RESUME: 2558 return snd_pcm_resume(substream); 2559 case SNDRV_PCM_IOCTL_XRUN: 2560 return snd_pcm_xrun(substream); 2561 case SNDRV_PCM_IOCTL_HWSYNC: 2562 return snd_pcm_hwsync(substream); 2563 case SNDRV_PCM_IOCTL_DELAY: 2564 return snd_pcm_delay(substream, arg); 2565 case SNDRV_PCM_IOCTL_SYNC_PTR: 2566 return snd_pcm_sync_ptr(substream, arg); 2567 #ifdef CONFIG_SND_SUPPORT_OLD_API 2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2569 return snd_pcm_hw_refine_old_user(substream, arg); 2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2571 return snd_pcm_hw_params_old_user(substream, arg); 2572 #endif 2573 case SNDRV_PCM_IOCTL_DRAIN: 2574 return snd_pcm_drain(substream, file); 2575 case SNDRV_PCM_IOCTL_DROP: 2576 return snd_pcm_drop(substream); 2577 case SNDRV_PCM_IOCTL_PAUSE: 2578 { 2579 int res; 2580 snd_pcm_stream_lock_irq(substream); 2581 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2582 snd_pcm_stream_unlock_irq(substream); 2583 return res; 2584 } 2585 } 2586 snd_printd("unknown ioctl = 0x%x\n", cmd); 2587 return -ENOTTY; 2588 } 2589 2590 static int snd_pcm_playback_ioctl1(struct file *file, 2591 struct snd_pcm_substream *substream, 2592 unsigned int cmd, void __user *arg) 2593 { 2594 if (snd_BUG_ON(!substream)) 2595 return -ENXIO; 2596 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2597 return -EINVAL; 2598 switch (cmd) { 2599 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2600 { 2601 struct snd_xferi xferi; 2602 struct snd_xferi __user *_xferi = arg; 2603 struct snd_pcm_runtime *runtime = substream->runtime; 2604 snd_pcm_sframes_t result; 2605 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2606 return -EBADFD; 2607 if (put_user(0, &_xferi->result)) 2608 return -EFAULT; 2609 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2610 return -EFAULT; 2611 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2612 __put_user(result, &_xferi->result); 2613 return result < 0 ? result : 0; 2614 } 2615 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2616 { 2617 struct snd_xfern xfern; 2618 struct snd_xfern __user *_xfern = arg; 2619 struct snd_pcm_runtime *runtime = substream->runtime; 2620 void __user **bufs; 2621 snd_pcm_sframes_t result; 2622 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2623 return -EBADFD; 2624 if (runtime->channels > 128) 2625 return -EINVAL; 2626 if (put_user(0, &_xfern->result)) 2627 return -EFAULT; 2628 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2629 return -EFAULT; 2630 2631 bufs = memdup_user(xfern.bufs, 2632 sizeof(void *) * runtime->channels); 2633 if (IS_ERR(bufs)) 2634 return PTR_ERR(bufs); 2635 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2636 kfree(bufs); 2637 __put_user(result, &_xfern->result); 2638 return result < 0 ? result : 0; 2639 } 2640 case SNDRV_PCM_IOCTL_REWIND: 2641 { 2642 snd_pcm_uframes_t frames; 2643 snd_pcm_uframes_t __user *_frames = arg; 2644 snd_pcm_sframes_t result; 2645 if (get_user(frames, _frames)) 2646 return -EFAULT; 2647 if (put_user(0, _frames)) 2648 return -EFAULT; 2649 result = snd_pcm_playback_rewind(substream, frames); 2650 __put_user(result, _frames); 2651 return result < 0 ? result : 0; 2652 } 2653 case SNDRV_PCM_IOCTL_FORWARD: 2654 { 2655 snd_pcm_uframes_t frames; 2656 snd_pcm_uframes_t __user *_frames = arg; 2657 snd_pcm_sframes_t result; 2658 if (get_user(frames, _frames)) 2659 return -EFAULT; 2660 if (put_user(0, _frames)) 2661 return -EFAULT; 2662 result = snd_pcm_playback_forward(substream, frames); 2663 __put_user(result, _frames); 2664 return result < 0 ? result : 0; 2665 } 2666 } 2667 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2668 } 2669 2670 static int snd_pcm_capture_ioctl1(struct file *file, 2671 struct snd_pcm_substream *substream, 2672 unsigned int cmd, void __user *arg) 2673 { 2674 if (snd_BUG_ON(!substream)) 2675 return -ENXIO; 2676 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2677 return -EINVAL; 2678 switch (cmd) { 2679 case SNDRV_PCM_IOCTL_READI_FRAMES: 2680 { 2681 struct snd_xferi xferi; 2682 struct snd_xferi __user *_xferi = arg; 2683 struct snd_pcm_runtime *runtime = substream->runtime; 2684 snd_pcm_sframes_t result; 2685 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2686 return -EBADFD; 2687 if (put_user(0, &_xferi->result)) 2688 return -EFAULT; 2689 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2690 return -EFAULT; 2691 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2692 __put_user(result, &_xferi->result); 2693 return result < 0 ? result : 0; 2694 } 2695 case SNDRV_PCM_IOCTL_READN_FRAMES: 2696 { 2697 struct snd_xfern xfern; 2698 struct snd_xfern __user *_xfern = arg; 2699 struct snd_pcm_runtime *runtime = substream->runtime; 2700 void *bufs; 2701 snd_pcm_sframes_t result; 2702 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2703 return -EBADFD; 2704 if (runtime->channels > 128) 2705 return -EINVAL; 2706 if (put_user(0, &_xfern->result)) 2707 return -EFAULT; 2708 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2709 return -EFAULT; 2710 2711 bufs = memdup_user(xfern.bufs, 2712 sizeof(void *) * runtime->channels); 2713 if (IS_ERR(bufs)) 2714 return PTR_ERR(bufs); 2715 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2716 kfree(bufs); 2717 __put_user(result, &_xfern->result); 2718 return result < 0 ? result : 0; 2719 } 2720 case SNDRV_PCM_IOCTL_REWIND: 2721 { 2722 snd_pcm_uframes_t frames; 2723 snd_pcm_uframes_t __user *_frames = arg; 2724 snd_pcm_sframes_t result; 2725 if (get_user(frames, _frames)) 2726 return -EFAULT; 2727 if (put_user(0, _frames)) 2728 return -EFAULT; 2729 result = snd_pcm_capture_rewind(substream, frames); 2730 __put_user(result, _frames); 2731 return result < 0 ? result : 0; 2732 } 2733 case SNDRV_PCM_IOCTL_FORWARD: 2734 { 2735 snd_pcm_uframes_t frames; 2736 snd_pcm_uframes_t __user *_frames = arg; 2737 snd_pcm_sframes_t result; 2738 if (get_user(frames, _frames)) 2739 return -EFAULT; 2740 if (put_user(0, _frames)) 2741 return -EFAULT; 2742 result = snd_pcm_capture_forward(substream, frames); 2743 __put_user(result, _frames); 2744 return result < 0 ? result : 0; 2745 } 2746 } 2747 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2748 } 2749 2750 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2751 unsigned long arg) 2752 { 2753 struct snd_pcm_file *pcm_file; 2754 2755 pcm_file = file->private_data; 2756 2757 if (((cmd >> 8) & 0xff) != 'A') 2758 return -ENOTTY; 2759 2760 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2761 (void __user *)arg); 2762 } 2763 2764 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2765 unsigned long arg) 2766 { 2767 struct snd_pcm_file *pcm_file; 2768 2769 pcm_file = file->private_data; 2770 2771 if (((cmd >> 8) & 0xff) != 'A') 2772 return -ENOTTY; 2773 2774 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2775 (void __user *)arg); 2776 } 2777 2778 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2779 unsigned int cmd, void *arg) 2780 { 2781 mm_segment_t fs; 2782 int result; 2783 2784 fs = snd_enter_user(); 2785 switch (substream->stream) { 2786 case SNDRV_PCM_STREAM_PLAYBACK: 2787 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2788 (void __user *)arg); 2789 break; 2790 case SNDRV_PCM_STREAM_CAPTURE: 2791 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2792 (void __user *)arg); 2793 break; 2794 default: 2795 result = -EINVAL; 2796 break; 2797 } 2798 snd_leave_user(fs); 2799 return result; 2800 } 2801 2802 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2803 2804 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2805 loff_t * offset) 2806 { 2807 struct snd_pcm_file *pcm_file; 2808 struct snd_pcm_substream *substream; 2809 struct snd_pcm_runtime *runtime; 2810 snd_pcm_sframes_t result; 2811 2812 pcm_file = file->private_data; 2813 substream = pcm_file->substream; 2814 if (PCM_RUNTIME_CHECK(substream)) 2815 return -ENXIO; 2816 runtime = substream->runtime; 2817 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2818 return -EBADFD; 2819 if (!frame_aligned(runtime, count)) 2820 return -EINVAL; 2821 count = bytes_to_frames(runtime, count); 2822 result = snd_pcm_lib_read(substream, buf, count); 2823 if (result > 0) 2824 result = frames_to_bytes(runtime, result); 2825 return result; 2826 } 2827 2828 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2829 size_t count, loff_t * offset) 2830 { 2831 struct snd_pcm_file *pcm_file; 2832 struct snd_pcm_substream *substream; 2833 struct snd_pcm_runtime *runtime; 2834 snd_pcm_sframes_t result; 2835 2836 pcm_file = file->private_data; 2837 substream = pcm_file->substream; 2838 if (PCM_RUNTIME_CHECK(substream)) 2839 return -ENXIO; 2840 runtime = substream->runtime; 2841 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2842 return -EBADFD; 2843 if (!frame_aligned(runtime, count)) 2844 return -EINVAL; 2845 count = bytes_to_frames(runtime, count); 2846 result = snd_pcm_lib_write(substream, buf, count); 2847 if (result > 0) 2848 result = frames_to_bytes(runtime, result); 2849 return result; 2850 } 2851 2852 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2853 unsigned long nr_segs, loff_t pos) 2854 2855 { 2856 struct snd_pcm_file *pcm_file; 2857 struct snd_pcm_substream *substream; 2858 struct snd_pcm_runtime *runtime; 2859 snd_pcm_sframes_t result; 2860 unsigned long i; 2861 void __user **bufs; 2862 snd_pcm_uframes_t frames; 2863 2864 pcm_file = iocb->ki_filp->private_data; 2865 substream = pcm_file->substream; 2866 if (PCM_RUNTIME_CHECK(substream)) 2867 return -ENXIO; 2868 runtime = substream->runtime; 2869 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2870 return -EBADFD; 2871 if (nr_segs > 1024 || nr_segs != runtime->channels) 2872 return -EINVAL; 2873 if (!frame_aligned(runtime, iov->iov_len)) 2874 return -EINVAL; 2875 frames = bytes_to_samples(runtime, iov->iov_len); 2876 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2877 if (bufs == NULL) 2878 return -ENOMEM; 2879 for (i = 0; i < nr_segs; ++i) 2880 bufs[i] = iov[i].iov_base; 2881 result = snd_pcm_lib_readv(substream, bufs, frames); 2882 if (result > 0) 2883 result = frames_to_bytes(runtime, result); 2884 kfree(bufs); 2885 return result; 2886 } 2887 2888 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2889 unsigned long nr_segs, loff_t pos) 2890 { 2891 struct snd_pcm_file *pcm_file; 2892 struct snd_pcm_substream *substream; 2893 struct snd_pcm_runtime *runtime; 2894 snd_pcm_sframes_t result; 2895 unsigned long i; 2896 void __user **bufs; 2897 snd_pcm_uframes_t frames; 2898 2899 pcm_file = iocb->ki_filp->private_data; 2900 substream = pcm_file->substream; 2901 if (PCM_RUNTIME_CHECK(substream)) 2902 return -ENXIO; 2903 runtime = substream->runtime; 2904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2905 return -EBADFD; 2906 if (nr_segs > 128 || nr_segs != runtime->channels || 2907 !frame_aligned(runtime, iov->iov_len)) 2908 return -EINVAL; 2909 frames = bytes_to_samples(runtime, iov->iov_len); 2910 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2911 if (bufs == NULL) 2912 return -ENOMEM; 2913 for (i = 0; i < nr_segs; ++i) 2914 bufs[i] = iov[i].iov_base; 2915 result = snd_pcm_lib_writev(substream, bufs, frames); 2916 if (result > 0) 2917 result = frames_to_bytes(runtime, result); 2918 kfree(bufs); 2919 return result; 2920 } 2921 2922 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2923 { 2924 struct snd_pcm_file *pcm_file; 2925 struct snd_pcm_substream *substream; 2926 struct snd_pcm_runtime *runtime; 2927 unsigned int mask; 2928 snd_pcm_uframes_t avail; 2929 2930 pcm_file = file->private_data; 2931 2932 substream = pcm_file->substream; 2933 if (PCM_RUNTIME_CHECK(substream)) 2934 return -ENXIO; 2935 runtime = substream->runtime; 2936 2937 poll_wait(file, &runtime->sleep, wait); 2938 2939 snd_pcm_stream_lock_irq(substream); 2940 avail = snd_pcm_playback_avail(runtime); 2941 switch (runtime->status->state) { 2942 case SNDRV_PCM_STATE_RUNNING: 2943 case SNDRV_PCM_STATE_PREPARED: 2944 case SNDRV_PCM_STATE_PAUSED: 2945 if (avail >= runtime->control->avail_min) { 2946 mask = POLLOUT | POLLWRNORM; 2947 break; 2948 } 2949 /* Fall through */ 2950 case SNDRV_PCM_STATE_DRAINING: 2951 mask = 0; 2952 break; 2953 default: 2954 mask = POLLOUT | POLLWRNORM | POLLERR; 2955 break; 2956 } 2957 snd_pcm_stream_unlock_irq(substream); 2958 return mask; 2959 } 2960 2961 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2962 { 2963 struct snd_pcm_file *pcm_file; 2964 struct snd_pcm_substream *substream; 2965 struct snd_pcm_runtime *runtime; 2966 unsigned int mask; 2967 snd_pcm_uframes_t avail; 2968 2969 pcm_file = file->private_data; 2970 2971 substream = pcm_file->substream; 2972 if (PCM_RUNTIME_CHECK(substream)) 2973 return -ENXIO; 2974 runtime = substream->runtime; 2975 2976 poll_wait(file, &runtime->sleep, wait); 2977 2978 snd_pcm_stream_lock_irq(substream); 2979 avail = snd_pcm_capture_avail(runtime); 2980 switch (runtime->status->state) { 2981 case SNDRV_PCM_STATE_RUNNING: 2982 case SNDRV_PCM_STATE_PREPARED: 2983 case SNDRV_PCM_STATE_PAUSED: 2984 if (avail >= runtime->control->avail_min) { 2985 mask = POLLIN | POLLRDNORM; 2986 break; 2987 } 2988 mask = 0; 2989 break; 2990 case SNDRV_PCM_STATE_DRAINING: 2991 if (avail > 0) { 2992 mask = POLLIN | POLLRDNORM; 2993 break; 2994 } 2995 /* Fall through */ 2996 default: 2997 mask = POLLIN | POLLRDNORM | POLLERR; 2998 break; 2999 } 3000 snd_pcm_stream_unlock_irq(substream); 3001 return mask; 3002 } 3003 3004 /* 3005 * mmap support 3006 */ 3007 3008 /* 3009 * Only on coherent architectures, we can mmap the status and the control records 3010 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3011 */ 3012 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3013 /* 3014 * mmap status record 3015 */ 3016 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3017 struct vm_fault *vmf) 3018 { 3019 struct snd_pcm_substream *substream = area->vm_private_data; 3020 struct snd_pcm_runtime *runtime; 3021 3022 if (substream == NULL) 3023 return VM_FAULT_SIGBUS; 3024 runtime = substream->runtime; 3025 vmf->page = virt_to_page(runtime->status); 3026 get_page(vmf->page); 3027 return 0; 3028 } 3029 3030 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3031 { 3032 .fault = snd_pcm_mmap_status_fault, 3033 }; 3034 3035 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3036 struct vm_area_struct *area) 3037 { 3038 struct snd_pcm_runtime *runtime; 3039 long size; 3040 if (!(area->vm_flags & VM_READ)) 3041 return -EINVAL; 3042 runtime = substream->runtime; 3043 size = area->vm_end - area->vm_start; 3044 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3045 return -EINVAL; 3046 area->vm_ops = &snd_pcm_vm_ops_status; 3047 area->vm_private_data = substream; 3048 area->vm_flags |= VM_RESERVED; 3049 return 0; 3050 } 3051 3052 /* 3053 * mmap control record 3054 */ 3055 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3056 struct vm_fault *vmf) 3057 { 3058 struct snd_pcm_substream *substream = area->vm_private_data; 3059 struct snd_pcm_runtime *runtime; 3060 3061 if (substream == NULL) 3062 return VM_FAULT_SIGBUS; 3063 runtime = substream->runtime; 3064 vmf->page = virt_to_page(runtime->control); 3065 get_page(vmf->page); 3066 return 0; 3067 } 3068 3069 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3070 { 3071 .fault = snd_pcm_mmap_control_fault, 3072 }; 3073 3074 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3075 struct vm_area_struct *area) 3076 { 3077 struct snd_pcm_runtime *runtime; 3078 long size; 3079 if (!(area->vm_flags & VM_READ)) 3080 return -EINVAL; 3081 runtime = substream->runtime; 3082 size = area->vm_end - area->vm_start; 3083 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3084 return -EINVAL; 3085 area->vm_ops = &snd_pcm_vm_ops_control; 3086 area->vm_private_data = substream; 3087 area->vm_flags |= VM_RESERVED; 3088 return 0; 3089 } 3090 #else /* ! coherent mmap */ 3091 /* 3092 * don't support mmap for status and control records. 3093 */ 3094 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3095 struct vm_area_struct *area) 3096 { 3097 return -ENXIO; 3098 } 3099 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3100 struct vm_area_struct *area) 3101 { 3102 return -ENXIO; 3103 } 3104 #endif /* coherent mmap */ 3105 3106 static inline struct page * 3107 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3108 { 3109 void *vaddr = substream->runtime->dma_area + ofs; 3110 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3111 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3112 return virt_to_page(CAC_ADDR(vaddr)); 3113 #endif 3114 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3115 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3116 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3117 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3118 /* assume dma_handle set via pfn_to_phys() in 3119 * mm/dma-noncoherent.c 3120 */ 3121 return pfn_to_page(addr >> PAGE_SHIFT); 3122 } 3123 #endif 3124 return virt_to_page(vaddr); 3125 } 3126 3127 /* 3128 * fault callback for mmapping a RAM page 3129 */ 3130 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3131 struct vm_fault *vmf) 3132 { 3133 struct snd_pcm_substream *substream = area->vm_private_data; 3134 struct snd_pcm_runtime *runtime; 3135 unsigned long offset; 3136 struct page * page; 3137 size_t dma_bytes; 3138 3139 if (substream == NULL) 3140 return VM_FAULT_SIGBUS; 3141 runtime = substream->runtime; 3142 offset = vmf->pgoff << PAGE_SHIFT; 3143 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3144 if (offset > dma_bytes - PAGE_SIZE) 3145 return VM_FAULT_SIGBUS; 3146 if (substream->ops->page) 3147 page = substream->ops->page(substream, offset); 3148 else 3149 page = snd_pcm_default_page_ops(substream, offset); 3150 if (!page) 3151 return VM_FAULT_SIGBUS; 3152 get_page(page); 3153 vmf->page = page; 3154 return 0; 3155 } 3156 3157 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3158 .open = snd_pcm_mmap_data_open, 3159 .close = snd_pcm_mmap_data_close, 3160 }; 3161 3162 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3163 .open = snd_pcm_mmap_data_open, 3164 .close = snd_pcm_mmap_data_close, 3165 .fault = snd_pcm_mmap_data_fault, 3166 }; 3167 3168 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3169 /* This should be defined / handled globally! */ 3170 #ifdef CONFIG_ARM 3171 #define ARCH_HAS_DMA_MMAP_COHERENT 3172 #endif 3173 #endif 3174 3175 /* 3176 * mmap the DMA buffer on RAM 3177 */ 3178 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3179 struct vm_area_struct *area) 3180 { 3181 area->vm_flags |= VM_RESERVED; 3182 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3183 if (!substream->ops->page && 3184 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3185 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3186 area, 3187 substream->runtime->dma_area, 3188 substream->runtime->dma_addr, 3189 area->vm_end - area->vm_start); 3190 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3191 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3192 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3193 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3194 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3195 /* mmap with fault handler */ 3196 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3197 return 0; 3198 } 3199 3200 /* 3201 * mmap the DMA buffer on I/O memory area 3202 */ 3203 #if SNDRV_PCM_INFO_MMAP_IOMEM 3204 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3205 struct vm_area_struct *area) 3206 { 3207 long size; 3208 unsigned long offset; 3209 3210 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3211 area->vm_flags |= VM_IO; 3212 size = area->vm_end - area->vm_start; 3213 offset = area->vm_pgoff << PAGE_SHIFT; 3214 if (io_remap_pfn_range(area, area->vm_start, 3215 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3216 size, area->vm_page_prot)) 3217 return -EAGAIN; 3218 return 0; 3219 } 3220 3221 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3222 #endif /* SNDRV_PCM_INFO_MMAP */ 3223 3224 /* mmap callback with pgprot_noncached */ 3225 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3226 struct vm_area_struct *area) 3227 { 3228 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3229 return snd_pcm_default_mmap(substream, area); 3230 } 3231 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3232 3233 /* 3234 * mmap DMA buffer 3235 */ 3236 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3237 struct vm_area_struct *area) 3238 { 3239 struct snd_pcm_runtime *runtime; 3240 long size; 3241 unsigned long offset; 3242 size_t dma_bytes; 3243 int err; 3244 3245 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3246 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3247 return -EINVAL; 3248 } else { 3249 if (!(area->vm_flags & VM_READ)) 3250 return -EINVAL; 3251 } 3252 runtime = substream->runtime; 3253 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3254 return -EBADFD; 3255 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3256 return -ENXIO; 3257 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3258 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3259 return -EINVAL; 3260 size = area->vm_end - area->vm_start; 3261 offset = area->vm_pgoff << PAGE_SHIFT; 3262 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3263 if ((size_t)size > dma_bytes) 3264 return -EINVAL; 3265 if (offset > dma_bytes - size) 3266 return -EINVAL; 3267 3268 area->vm_ops = &snd_pcm_vm_ops_data; 3269 area->vm_private_data = substream; 3270 if (substream->ops->mmap) 3271 err = substream->ops->mmap(substream, area); 3272 else 3273 err = snd_pcm_default_mmap(substream, area); 3274 if (!err) 3275 atomic_inc(&substream->mmap_count); 3276 return err; 3277 } 3278 3279 EXPORT_SYMBOL(snd_pcm_mmap_data); 3280 3281 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3282 { 3283 struct snd_pcm_file * pcm_file; 3284 struct snd_pcm_substream *substream; 3285 unsigned long offset; 3286 3287 pcm_file = file->private_data; 3288 substream = pcm_file->substream; 3289 if (PCM_RUNTIME_CHECK(substream)) 3290 return -ENXIO; 3291 3292 offset = area->vm_pgoff << PAGE_SHIFT; 3293 switch (offset) { 3294 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3295 if (pcm_file->no_compat_mmap) 3296 return -ENXIO; 3297 return snd_pcm_mmap_status(substream, file, area); 3298 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3299 if (pcm_file->no_compat_mmap) 3300 return -ENXIO; 3301 return snd_pcm_mmap_control(substream, file, area); 3302 default: 3303 return snd_pcm_mmap_data(substream, file, area); 3304 } 3305 return 0; 3306 } 3307 3308 static int snd_pcm_fasync(int fd, struct file * file, int on) 3309 { 3310 struct snd_pcm_file * pcm_file; 3311 struct snd_pcm_substream *substream; 3312 struct snd_pcm_runtime *runtime; 3313 int err = -ENXIO; 3314 3315 lock_kernel(); 3316 pcm_file = file->private_data; 3317 substream = pcm_file->substream; 3318 if (PCM_RUNTIME_CHECK(substream)) 3319 goto out; 3320 runtime = substream->runtime; 3321 err = fasync_helper(fd, file, on, &runtime->fasync); 3322 out: 3323 unlock_kernel(); 3324 return err; 3325 } 3326 3327 /* 3328 * ioctl32 compat 3329 */ 3330 #ifdef CONFIG_COMPAT 3331 #include "pcm_compat.c" 3332 #else 3333 #define snd_pcm_ioctl_compat NULL 3334 #endif 3335 3336 /* 3337 * To be removed helpers to keep binary compatibility 3338 */ 3339 3340 #ifdef CONFIG_SND_SUPPORT_OLD_API 3341 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3342 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3343 3344 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3345 struct snd_pcm_hw_params_old *oparams) 3346 { 3347 unsigned int i; 3348 3349 memset(params, 0, sizeof(*params)); 3350 params->flags = oparams->flags; 3351 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3352 params->masks[i].bits[0] = oparams->masks[i]; 3353 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3354 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3355 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3356 params->info = oparams->info; 3357 params->msbits = oparams->msbits; 3358 params->rate_num = oparams->rate_num; 3359 params->rate_den = oparams->rate_den; 3360 params->fifo_size = oparams->fifo_size; 3361 } 3362 3363 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3364 struct snd_pcm_hw_params *params) 3365 { 3366 unsigned int i; 3367 3368 memset(oparams, 0, sizeof(*oparams)); 3369 oparams->flags = params->flags; 3370 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3371 oparams->masks[i] = params->masks[i].bits[0]; 3372 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3373 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3374 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3375 oparams->info = params->info; 3376 oparams->msbits = params->msbits; 3377 oparams->rate_num = params->rate_num; 3378 oparams->rate_den = params->rate_den; 3379 oparams->fifo_size = params->fifo_size; 3380 } 3381 3382 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3383 struct snd_pcm_hw_params_old __user * _oparams) 3384 { 3385 struct snd_pcm_hw_params *params; 3386 struct snd_pcm_hw_params_old *oparams = NULL; 3387 int err; 3388 3389 params = kmalloc(sizeof(*params), GFP_KERNEL); 3390 if (!params) 3391 return -ENOMEM; 3392 3393 oparams = memdup_user(_oparams, sizeof(*oparams)); 3394 if (IS_ERR(oparams)) { 3395 err = PTR_ERR(oparams); 3396 goto out; 3397 } 3398 snd_pcm_hw_convert_from_old_params(params, oparams); 3399 err = snd_pcm_hw_refine(substream, params); 3400 snd_pcm_hw_convert_to_old_params(oparams, params); 3401 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3402 if (!err) 3403 err = -EFAULT; 3404 } 3405 3406 kfree(oparams); 3407 out: 3408 kfree(params); 3409 return err; 3410 } 3411 3412 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3413 struct snd_pcm_hw_params_old __user * _oparams) 3414 { 3415 struct snd_pcm_hw_params *params; 3416 struct snd_pcm_hw_params_old *oparams = NULL; 3417 int err; 3418 3419 params = kmalloc(sizeof(*params), GFP_KERNEL); 3420 if (!params) 3421 return -ENOMEM; 3422 3423 oparams = memdup_user(_oparams, sizeof(*oparams)); 3424 if (IS_ERR(oparams)) { 3425 err = PTR_ERR(oparams); 3426 goto out; 3427 } 3428 snd_pcm_hw_convert_from_old_params(params, oparams); 3429 err = snd_pcm_hw_params(substream, params); 3430 snd_pcm_hw_convert_to_old_params(oparams, params); 3431 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3432 if (!err) 3433 err = -EFAULT; 3434 } 3435 3436 kfree(oparams); 3437 out: 3438 kfree(params); 3439 return err; 3440 } 3441 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3442 3443 #ifndef CONFIG_MMU 3444 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr, 3445 unsigned long len, unsigned long pgoff, 3446 unsigned long flags) 3447 { 3448 return 0; 3449 } 3450 #else 3451 # define dummy_get_unmapped_area NULL 3452 #endif 3453 3454 /* 3455 * Register section 3456 */ 3457 3458 const struct file_operations snd_pcm_f_ops[2] = { 3459 { 3460 .owner = THIS_MODULE, 3461 .write = snd_pcm_write, 3462 .aio_write = snd_pcm_aio_write, 3463 .open = snd_pcm_playback_open, 3464 .release = snd_pcm_release, 3465 .poll = snd_pcm_playback_poll, 3466 .unlocked_ioctl = snd_pcm_playback_ioctl, 3467 .compat_ioctl = snd_pcm_ioctl_compat, 3468 .mmap = snd_pcm_mmap, 3469 .fasync = snd_pcm_fasync, 3470 .get_unmapped_area = dummy_get_unmapped_area, 3471 }, 3472 { 3473 .owner = THIS_MODULE, 3474 .read = snd_pcm_read, 3475 .aio_read = snd_pcm_aio_read, 3476 .open = snd_pcm_capture_open, 3477 .release = snd_pcm_release, 3478 .poll = snd_pcm_capture_poll, 3479 .unlocked_ioctl = snd_pcm_capture_ioctl, 3480 .compat_ioctl = snd_pcm_ioctl_compat, 3481 .mmap = snd_pcm_mmap, 3482 .fasync = snd_pcm_fasync, 3483 .get_unmapped_area = dummy_get_unmapped_area, 3484 } 3485 }; 3486