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