1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> 23 #include <linux/mm.h> 24 #include <linux/smp_lock.h> 25 #include <linux/file.h> 26 #include <linux/slab.h> 27 #include <linux/time.h> 28 #include <linux/uio.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/info.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/timer.h> 35 #include <sound/minors.h> 36 #include <asm/io.h> 37 38 /* 39 * Compatibility 40 */ 41 42 struct sndrv_pcm_hw_params_old { 43 unsigned int flags; 44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 45 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 46 struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 48 unsigned int rmask; 49 unsigned int cmask; 50 unsigned int info; 51 unsigned int msbits; 52 unsigned int rate_num; 53 unsigned int rate_den; 54 sndrv_pcm_uframes_t fifo_size; 55 unsigned char reserved[64]; 56 }; 57 58 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old) 59 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old) 60 61 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); 62 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams); 63 64 /* 65 * 66 */ 67 68 DEFINE_RWLOCK(snd_pcm_link_rwlock); 69 static DECLARE_RWSEM(snd_pcm_link_rwsem); 70 71 72 static inline mm_segment_t snd_enter_user(void) 73 { 74 mm_segment_t fs = get_fs(); 75 set_fs(get_ds()); 76 return fs; 77 } 78 79 static inline void snd_leave_user(mm_segment_t fs) 80 { 81 set_fs(fs); 82 } 83 84 85 86 int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info) 87 { 88 snd_pcm_runtime_t * runtime; 89 snd_pcm_t *pcm = substream->pcm; 90 snd_pcm_str_t *pstr = substream->pstr; 91 92 snd_assert(substream != NULL, return -ENXIO); 93 memset(info, 0, sizeof(*info)); 94 info->card = pcm->card->number; 95 info->device = pcm->device; 96 info->stream = substream->stream; 97 info->subdevice = substream->number; 98 strlcpy(info->id, pcm->id, sizeof(info->id)); 99 strlcpy(info->name, pcm->name, sizeof(info->name)); 100 info->dev_class = pcm->dev_class; 101 info->dev_subclass = pcm->dev_subclass; 102 info->subdevices_count = pstr->substream_count; 103 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 104 strlcpy(info->subname, substream->name, sizeof(info->subname)); 105 runtime = substream->runtime; 106 /* AB: FIXME!!! This is definitely nonsense */ 107 if (runtime) { 108 info->sync = runtime->sync; 109 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 110 } 111 return 0; 112 } 113 114 int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info) 115 { 116 snd_pcm_info_t *info; 117 int err; 118 119 info = kmalloc(sizeof(*info), GFP_KERNEL); 120 if (! info) 121 return -ENOMEM; 122 err = snd_pcm_info(substream, info); 123 if (err >= 0) { 124 if (copy_to_user(_info, info, sizeof(*info))) 125 err = -EFAULT; 126 } 127 kfree(info); 128 return err; 129 } 130 131 #undef RULES_DEBUG 132 133 #ifdef RULES_DEBUG 134 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 135 char *snd_pcm_hw_param_names[] = { 136 HW_PARAM(ACCESS), 137 HW_PARAM(FORMAT), 138 HW_PARAM(SUBFORMAT), 139 HW_PARAM(SAMPLE_BITS), 140 HW_PARAM(FRAME_BITS), 141 HW_PARAM(CHANNELS), 142 HW_PARAM(RATE), 143 HW_PARAM(PERIOD_TIME), 144 HW_PARAM(PERIOD_SIZE), 145 HW_PARAM(PERIOD_BYTES), 146 HW_PARAM(PERIODS), 147 HW_PARAM(BUFFER_TIME), 148 HW_PARAM(BUFFER_SIZE), 149 HW_PARAM(BUFFER_BYTES), 150 HW_PARAM(TICK_TIME), 151 }; 152 #endif 153 154 int snd_pcm_hw_refine(snd_pcm_substream_t *substream, 155 snd_pcm_hw_params_t *params) 156 { 157 unsigned int k; 158 snd_pcm_hardware_t *hw; 159 snd_interval_t *i = NULL; 160 snd_mask_t *m = NULL; 161 snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints; 162 unsigned int rstamps[constrs->rules_num]; 163 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 164 unsigned int stamp = 2; 165 int changed, again; 166 167 params->info = 0; 168 params->fifo_size = 0; 169 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 170 params->msbits = 0; 171 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 172 params->rate_num = 0; 173 params->rate_den = 0; 174 } 175 176 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 177 m = hw_param_mask(params, k); 178 if (snd_mask_empty(m)) 179 return -EINVAL; 180 if (!(params->rmask & (1 << k))) 181 continue; 182 #ifdef RULES_DEBUG 183 printk("%s = ", snd_pcm_hw_param_names[k]); 184 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 185 #endif 186 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 187 #ifdef RULES_DEBUG 188 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 189 #endif 190 if (changed) 191 params->cmask |= 1 << k; 192 if (changed < 0) 193 return changed; 194 } 195 196 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 197 i = hw_param_interval(params, k); 198 if (snd_interval_empty(i)) 199 return -EINVAL; 200 if (!(params->rmask & (1 << k))) 201 continue; 202 #ifdef RULES_DEBUG 203 printk("%s = ", snd_pcm_hw_param_names[k]); 204 if (i->empty) 205 printk("empty"); 206 else 207 printk("%c%u %u%c", 208 i->openmin ? '(' : '[', i->min, 209 i->max, i->openmax ? ')' : ']'); 210 printk(" -> "); 211 #endif 212 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 213 #ifdef RULES_DEBUG 214 if (i->empty) 215 printk("empty\n"); 216 else 217 printk("%c%u %u%c\n", 218 i->openmin ? '(' : '[', i->min, 219 i->max, i->openmax ? ')' : ']'); 220 #endif 221 if (changed) 222 params->cmask |= 1 << k; 223 if (changed < 0) 224 return changed; 225 } 226 227 for (k = 0; k < constrs->rules_num; k++) 228 rstamps[k] = 0; 229 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 230 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 231 do { 232 again = 0; 233 for (k = 0; k < constrs->rules_num; k++) { 234 snd_pcm_hw_rule_t *r = &constrs->rules[k]; 235 unsigned int d; 236 int doit = 0; 237 if (r->cond && !(r->cond & params->flags)) 238 continue; 239 for (d = 0; r->deps[d] >= 0; d++) { 240 if (vstamps[r->deps[d]] > rstamps[k]) { 241 doit = 1; 242 break; 243 } 244 } 245 if (!doit) 246 continue; 247 #ifdef RULES_DEBUG 248 printk("Rule %d [%p]: ", k, r->func); 249 if (r->var >= 0) { 250 printk("%s = ", snd_pcm_hw_param_names[r->var]); 251 if (hw_is_mask(r->var)) { 252 m = hw_param_mask(params, r->var); 253 printk("%x", *m->bits); 254 } else { 255 i = hw_param_interval(params, r->var); 256 if (i->empty) 257 printk("empty"); 258 else 259 printk("%c%u %u%c", 260 i->openmin ? '(' : '[', i->min, 261 i->max, i->openmax ? ')' : ']'); 262 } 263 } 264 #endif 265 changed = r->func(params, r); 266 #ifdef RULES_DEBUG 267 if (r->var >= 0) { 268 printk(" -> "); 269 if (hw_is_mask(r->var)) 270 printk("%x", *m->bits); 271 else { 272 if (i->empty) 273 printk("empty"); 274 else 275 printk("%c%u %u%c", 276 i->openmin ? '(' : '[', i->min, 277 i->max, i->openmax ? ')' : ']'); 278 } 279 } 280 printk("\n"); 281 #endif 282 rstamps[k] = stamp; 283 if (changed && r->var >= 0) { 284 params->cmask |= (1 << r->var); 285 vstamps[r->var] = stamp; 286 again = 1; 287 } 288 if (changed < 0) 289 return changed; 290 stamp++; 291 } 292 } while (again); 293 if (!params->msbits) { 294 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 295 if (snd_interval_single(i)) 296 params->msbits = snd_interval_value(i); 297 } 298 299 if (!params->rate_den) { 300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 301 if (snd_interval_single(i)) { 302 params->rate_num = snd_interval_value(i); 303 params->rate_den = 1; 304 } 305 } 306 307 hw = &substream->runtime->hw; 308 if (!params->info) 309 params->info = hw->info; 310 if (!params->fifo_size) 311 params->fifo_size = hw->fifo_size; 312 params->rmask = 0; 313 return 0; 314 } 315 316 static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) 317 { 318 snd_pcm_hw_params_t *params; 319 int err; 320 321 params = kmalloc(sizeof(*params), GFP_KERNEL); 322 if (!params) { 323 err = -ENOMEM; 324 goto out; 325 } 326 if (copy_from_user(params, _params, sizeof(*params))) { 327 err = -EFAULT; 328 goto out; 329 } 330 err = snd_pcm_hw_refine(substream, params); 331 if (copy_to_user(_params, params, sizeof(*params))) { 332 if (!err) 333 err = -EFAULT; 334 } 335 out: 336 kfree(params); 337 return err; 338 } 339 340 int snd_pcm_hw_params(snd_pcm_substream_t *substream, 341 snd_pcm_hw_params_t *params) 342 { 343 snd_pcm_runtime_t *runtime; 344 int err; 345 unsigned int bits; 346 snd_pcm_uframes_t frames; 347 348 snd_assert(substream != NULL, return -ENXIO); 349 runtime = substream->runtime; 350 snd_assert(runtime != NULL, return -ENXIO); 351 snd_pcm_stream_lock_irq(substream); 352 switch (runtime->status->state) { 353 case SNDRV_PCM_STATE_OPEN: 354 case SNDRV_PCM_STATE_SETUP: 355 case SNDRV_PCM_STATE_PREPARED: 356 break; 357 default: 358 snd_pcm_stream_unlock_irq(substream); 359 return -EBADFD; 360 } 361 snd_pcm_stream_unlock_irq(substream); 362 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 363 if (!substream->oss.oss) 364 #endif 365 if (atomic_read(&runtime->mmap_count)) 366 return -EBADFD; 367 368 params->rmask = ~0U; 369 err = snd_pcm_hw_refine(substream, params); 370 if (err < 0) 371 goto _error; 372 373 err = snd_pcm_hw_params_choose(substream, params); 374 if (err < 0) 375 goto _error; 376 377 if (substream->ops->hw_params != NULL) { 378 err = substream->ops->hw_params(substream, params); 379 if (err < 0) 380 goto _error; 381 } 382 383 runtime->access = params_access(params); 384 runtime->format = params_format(params); 385 runtime->subformat = params_subformat(params); 386 runtime->channels = params_channels(params); 387 runtime->rate = params_rate(params); 388 runtime->period_size = params_period_size(params); 389 runtime->periods = params_periods(params); 390 runtime->buffer_size = params_buffer_size(params); 391 runtime->tick_time = params_tick_time(params); 392 runtime->info = params->info; 393 runtime->rate_num = params->rate_num; 394 runtime->rate_den = params->rate_den; 395 396 bits = snd_pcm_format_physical_width(runtime->format); 397 runtime->sample_bits = bits; 398 bits *= runtime->channels; 399 runtime->frame_bits = bits; 400 frames = 1; 401 while (bits % 8 != 0) { 402 bits *= 2; 403 frames *= 2; 404 } 405 runtime->byte_align = bits / 8; 406 runtime->min_align = frames; 407 408 /* Default sw params */ 409 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 410 runtime->period_step = 1; 411 runtime->sleep_min = 0; 412 runtime->control->avail_min = runtime->period_size; 413 runtime->xfer_align = runtime->period_size; 414 runtime->start_threshold = 1; 415 runtime->stop_threshold = runtime->buffer_size; 416 runtime->silence_threshold = 0; 417 runtime->silence_size = 0; 418 runtime->boundary = runtime->buffer_size; 419 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 420 runtime->boundary *= 2; 421 422 snd_pcm_timer_resolution_change(substream); 423 runtime->status->state = SNDRV_PCM_STATE_SETUP; 424 return 0; 425 _error: 426 /* hardware might be unuseable from this time, 427 so we force application to retry to set 428 the correct hardware parameter settings */ 429 runtime->status->state = SNDRV_PCM_STATE_OPEN; 430 if (substream->ops->hw_free != NULL) 431 substream->ops->hw_free(substream); 432 return err; 433 } 434 435 static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params) 436 { 437 snd_pcm_hw_params_t *params; 438 int err; 439 440 params = kmalloc(sizeof(*params), GFP_KERNEL); 441 if (!params) { 442 err = -ENOMEM; 443 goto out; 444 } 445 if (copy_from_user(params, _params, sizeof(*params))) { 446 err = -EFAULT; 447 goto out; 448 } 449 err = snd_pcm_hw_params(substream, params); 450 if (copy_to_user(_params, params, sizeof(*params))) { 451 if (!err) 452 err = -EFAULT; 453 } 454 out: 455 kfree(params); 456 return err; 457 } 458 459 static int snd_pcm_hw_free(snd_pcm_substream_t * substream) 460 { 461 snd_pcm_runtime_t *runtime; 462 int result = 0; 463 464 snd_assert(substream != NULL, return -ENXIO); 465 runtime = substream->runtime; 466 snd_assert(runtime != NULL, return -ENXIO); 467 snd_pcm_stream_lock_irq(substream); 468 switch (runtime->status->state) { 469 case SNDRV_PCM_STATE_SETUP: 470 case SNDRV_PCM_STATE_PREPARED: 471 break; 472 default: 473 snd_pcm_stream_unlock_irq(substream); 474 return -EBADFD; 475 } 476 snd_pcm_stream_unlock_irq(substream); 477 if (atomic_read(&runtime->mmap_count)) 478 return -EBADFD; 479 if (substream->ops->hw_free) 480 result = substream->ops->hw_free(substream); 481 runtime->status->state = SNDRV_PCM_STATE_OPEN; 482 return result; 483 } 484 485 static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params) 486 { 487 snd_pcm_runtime_t *runtime; 488 489 snd_assert(substream != NULL, return -ENXIO); 490 runtime = substream->runtime; 491 snd_assert(runtime != NULL, return -ENXIO); 492 snd_pcm_stream_lock_irq(substream); 493 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 494 snd_pcm_stream_unlock_irq(substream); 495 return -EBADFD; 496 } 497 snd_pcm_stream_unlock_irq(substream); 498 499 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 500 return -EINVAL; 501 if (params->avail_min == 0) 502 return -EINVAL; 503 if (params->xfer_align == 0 || 504 params->xfer_align % runtime->min_align != 0) 505 return -EINVAL; 506 if (params->silence_size >= runtime->boundary) { 507 if (params->silence_threshold != 0) 508 return -EINVAL; 509 } else { 510 if (params->silence_size > params->silence_threshold) 511 return -EINVAL; 512 if (params->silence_threshold > runtime->buffer_size) 513 return -EINVAL; 514 } 515 snd_pcm_stream_lock_irq(substream); 516 runtime->tstamp_mode = params->tstamp_mode; 517 runtime->sleep_min = params->sleep_min; 518 runtime->period_step = params->period_step; 519 runtime->control->avail_min = params->avail_min; 520 runtime->start_threshold = params->start_threshold; 521 runtime->stop_threshold = params->stop_threshold; 522 runtime->silence_threshold = params->silence_threshold; 523 runtime->silence_size = params->silence_size; 524 runtime->xfer_align = params->xfer_align; 525 params->boundary = runtime->boundary; 526 if (snd_pcm_running(substream)) { 527 if (runtime->sleep_min) 528 snd_pcm_tick_prepare(substream); 529 else 530 snd_pcm_tick_set(substream, 0); 531 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 532 runtime->silence_size > 0) 533 snd_pcm_playback_silence(substream, ULONG_MAX); 534 wake_up(&runtime->sleep); 535 } 536 snd_pcm_stream_unlock_irq(substream); 537 return 0; 538 } 539 540 static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params) 541 { 542 snd_pcm_sw_params_t params; 543 int err; 544 if (copy_from_user(¶ms, _params, sizeof(params))) 545 return -EFAULT; 546 err = snd_pcm_sw_params(substream, ¶ms); 547 if (copy_to_user(_params, ¶ms, sizeof(params))) 548 return -EFAULT; 549 return err; 550 } 551 552 int snd_pcm_status(snd_pcm_substream_t *substream, 553 snd_pcm_status_t *status) 554 { 555 snd_pcm_runtime_t *runtime = substream->runtime; 556 557 snd_pcm_stream_lock_irq(substream); 558 status->state = runtime->status->state; 559 status->suspended_state = runtime->status->suspended_state; 560 if (status->state == SNDRV_PCM_STATE_OPEN) 561 goto _end; 562 status->trigger_tstamp = runtime->trigger_tstamp; 563 if (snd_pcm_running(substream)) { 564 snd_pcm_update_hw_ptr(substream); 565 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) 566 status->tstamp = runtime->status->tstamp; 567 else 568 snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec); 569 } else 570 snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec); 571 status->appl_ptr = runtime->control->appl_ptr; 572 status->hw_ptr = runtime->status->hw_ptr; 573 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 574 status->avail = snd_pcm_playback_avail(runtime); 575 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 576 runtime->status->state == SNDRV_PCM_STATE_DRAINING) 577 status->delay = runtime->buffer_size - status->avail; 578 else 579 status->delay = 0; 580 } else { 581 status->avail = snd_pcm_capture_avail(runtime); 582 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 583 status->delay = status->avail; 584 else 585 status->delay = 0; 586 } 587 status->avail_max = runtime->avail_max; 588 status->overrange = runtime->overrange; 589 runtime->avail_max = 0; 590 runtime->overrange = 0; 591 _end: 592 snd_pcm_stream_unlock_irq(substream); 593 return 0; 594 } 595 596 static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status) 597 { 598 snd_pcm_status_t status; 599 snd_pcm_runtime_t *runtime; 600 int res; 601 602 snd_assert(substream != NULL, return -ENXIO); 603 runtime = substream->runtime; 604 memset(&status, 0, sizeof(status)); 605 res = snd_pcm_status(substream, &status); 606 if (res < 0) 607 return res; 608 if (copy_to_user(_status, &status, sizeof(status))) 609 return -EFAULT; 610 return 0; 611 } 612 613 static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info) 614 { 615 snd_pcm_runtime_t *runtime; 616 unsigned int channel; 617 618 snd_assert(substream != NULL, return -ENXIO); 619 channel = info->channel; 620 runtime = substream->runtime; 621 snd_pcm_stream_lock_irq(substream); 622 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 623 snd_pcm_stream_unlock_irq(substream); 624 return -EBADFD; 625 } 626 snd_pcm_stream_unlock_irq(substream); 627 if (channel >= runtime->channels) 628 return -EINVAL; 629 memset(info, 0, sizeof(*info)); 630 info->channel = channel; 631 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 632 } 633 634 static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info) 635 { 636 snd_pcm_channel_info_t info; 637 int res; 638 639 if (copy_from_user(&info, _info, sizeof(info))) 640 return -EFAULT; 641 res = snd_pcm_channel_info(substream, &info); 642 if (res < 0) 643 return res; 644 if (copy_to_user(_info, &info, sizeof(info))) 645 return -EFAULT; 646 return 0; 647 } 648 649 static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream) 650 { 651 snd_pcm_runtime_t *runtime = substream->runtime; 652 if (runtime->trigger_master == NULL) 653 return; 654 if (runtime->trigger_master == substream) { 655 snd_timestamp_now(&runtime->trigger_tstamp, runtime->tstamp_timespec); 656 } else { 657 snd_pcm_trigger_tstamp(runtime->trigger_master); 658 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 659 } 660 runtime->trigger_master = NULL; 661 } 662 663 struct action_ops { 664 int (*pre_action)(snd_pcm_substream_t *substream, int state); 665 int (*do_action)(snd_pcm_substream_t *substream, int state); 666 void (*undo_action)(snd_pcm_substream_t *substream, int state); 667 void (*post_action)(snd_pcm_substream_t *substream, int state); 668 }; 669 670 /* 671 * this functions is core for handling of linked stream 672 * Note: the stream state might be changed also on failure 673 * Note2: call with calling stream lock + link lock 674 */ 675 static int snd_pcm_action_group(struct action_ops *ops, 676 snd_pcm_substream_t *substream, 677 int state, int do_lock) 678 { 679 struct list_head *pos; 680 snd_pcm_substream_t *s = NULL; 681 snd_pcm_substream_t *s1; 682 int res = 0; 683 684 snd_pcm_group_for_each(pos, substream) { 685 s = snd_pcm_group_substream_entry(pos); 686 if (do_lock && s != substream) 687 spin_lock(&s->self_group.lock); 688 res = ops->pre_action(s, state); 689 if (res < 0) 690 goto _unlock; 691 } 692 snd_pcm_group_for_each(pos, substream) { 693 s = snd_pcm_group_substream_entry(pos); 694 res = ops->do_action(s, state); 695 if (res < 0) { 696 if (ops->undo_action) { 697 snd_pcm_group_for_each(pos, substream) { 698 s1 = snd_pcm_group_substream_entry(pos); 699 if (s1 == s) /* failed stream */ 700 break; 701 ops->undo_action(s1, state); 702 } 703 } 704 s = NULL; /* unlock all */ 705 goto _unlock; 706 } 707 } 708 snd_pcm_group_for_each(pos, substream) { 709 s = snd_pcm_group_substream_entry(pos); 710 ops->post_action(s, state); 711 } 712 _unlock: 713 if (do_lock) { 714 /* unlock streams */ 715 snd_pcm_group_for_each(pos, substream) { 716 s1 = snd_pcm_group_substream_entry(pos); 717 if (s1 != substream) 718 spin_unlock(&s1->self_group.lock); 719 if (s1 == s) /* end */ 720 break; 721 } 722 } 723 return res; 724 } 725 726 /* 727 * Note: call with stream lock 728 */ 729 static int snd_pcm_action_single(struct action_ops *ops, 730 snd_pcm_substream_t *substream, 731 int state) 732 { 733 int res; 734 735 res = ops->pre_action(substream, state); 736 if (res < 0) 737 return res; 738 res = ops->do_action(substream, state); 739 if (res == 0) 740 ops->post_action(substream, state); 741 else if (ops->undo_action) 742 ops->undo_action(substream, state); 743 return res; 744 } 745 746 /* 747 * Note: call with stream lock 748 */ 749 static int snd_pcm_action(struct action_ops *ops, 750 snd_pcm_substream_t *substream, 751 int state) 752 { 753 int res; 754 755 if (snd_pcm_stream_linked(substream)) { 756 if (!spin_trylock(&substream->group->lock)) { 757 spin_unlock(&substream->self_group.lock); 758 spin_lock(&substream->group->lock); 759 spin_lock(&substream->self_group.lock); 760 } 761 res = snd_pcm_action_group(ops, substream, state, 1); 762 spin_unlock(&substream->group->lock); 763 } else { 764 res = snd_pcm_action_single(ops, substream, state); 765 } 766 return res; 767 } 768 769 /* 770 * Note: don't use any locks before 771 */ 772 static int snd_pcm_action_lock_irq(struct action_ops *ops, 773 snd_pcm_substream_t *substream, 774 int state) 775 { 776 int res; 777 778 read_lock_irq(&snd_pcm_link_rwlock); 779 if (snd_pcm_stream_linked(substream)) { 780 spin_lock(&substream->group->lock); 781 spin_lock(&substream->self_group.lock); 782 res = snd_pcm_action_group(ops, substream, state, 1); 783 spin_unlock(&substream->self_group.lock); 784 spin_unlock(&substream->group->lock); 785 } else { 786 spin_lock(&substream->self_group.lock); 787 res = snd_pcm_action_single(ops, substream, state); 788 spin_unlock(&substream->self_group.lock); 789 } 790 read_unlock_irq(&snd_pcm_link_rwlock); 791 return res; 792 } 793 794 /* 795 */ 796 static int snd_pcm_action_nonatomic(struct action_ops *ops, 797 snd_pcm_substream_t *substream, 798 int state) 799 { 800 int res; 801 802 down_read(&snd_pcm_link_rwsem); 803 if (snd_pcm_stream_linked(substream)) 804 res = snd_pcm_action_group(ops, substream, state, 0); 805 else 806 res = snd_pcm_action_single(ops, substream, state); 807 up_read(&snd_pcm_link_rwsem); 808 return res; 809 } 810 811 /* 812 * start callbacks 813 */ 814 static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state) 815 { 816 snd_pcm_runtime_t *runtime = substream->runtime; 817 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 818 return -EBADFD; 819 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 820 !snd_pcm_playback_data(substream)) 821 return -EPIPE; 822 runtime->trigger_master = substream; 823 return 0; 824 } 825 826 static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state) 827 { 828 if (substream->runtime->trigger_master != substream) 829 return 0; 830 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 831 } 832 833 static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state) 834 { 835 if (substream->runtime->trigger_master == substream) 836 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 837 } 838 839 static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state) 840 { 841 snd_pcm_runtime_t *runtime = substream->runtime; 842 snd_pcm_trigger_tstamp(substream); 843 runtime->status->state = state; 844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 845 runtime->silence_size > 0) 846 snd_pcm_playback_silence(substream, ULONG_MAX); 847 if (runtime->sleep_min) 848 snd_pcm_tick_prepare(substream); 849 if (substream->timer) 850 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp); 851 } 852 853 static struct action_ops snd_pcm_action_start = { 854 .pre_action = snd_pcm_pre_start, 855 .do_action = snd_pcm_do_start, 856 .undo_action = snd_pcm_undo_start, 857 .post_action = snd_pcm_post_start 858 }; 859 860 /** 861 * snd_pcm_start 862 * 863 * Start all linked streams. 864 */ 865 int snd_pcm_start(snd_pcm_substream_t *substream) 866 { 867 return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 868 } 869 870 /* 871 * stop callbacks 872 */ 873 static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state) 874 { 875 snd_pcm_runtime_t *runtime = substream->runtime; 876 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 877 return -EBADFD; 878 runtime->trigger_master = substream; 879 return 0; 880 } 881 882 static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state) 883 { 884 if (substream->runtime->trigger_master == substream && 885 snd_pcm_running(substream)) 886 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 887 return 0; /* unconditonally stop all substreams */ 888 } 889 890 static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state) 891 { 892 snd_pcm_runtime_t *runtime = substream->runtime; 893 if (runtime->status->state != state) { 894 snd_pcm_trigger_tstamp(substream); 895 if (substream->timer) 896 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp); 897 runtime->status->state = state; 898 snd_pcm_tick_set(substream, 0); 899 } 900 wake_up(&runtime->sleep); 901 } 902 903 static struct action_ops snd_pcm_action_stop = { 904 .pre_action = snd_pcm_pre_stop, 905 .do_action = snd_pcm_do_stop, 906 .post_action = snd_pcm_post_stop 907 }; 908 909 /** 910 * snd_pcm_stop 911 * 912 * Try to stop all running streams in the substream group. 913 * The state of each stream is changed to the given value after that unconditionally. 914 */ 915 int snd_pcm_stop(snd_pcm_substream_t *substream, int state) 916 { 917 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 918 } 919 920 /** 921 * snd_pcm_drain_done 922 * 923 * Stop the DMA only when the given stream is playback. 924 * The state is changed to SETUP. 925 * Unlike snd_pcm_stop(), this affects only the given stream. 926 */ 927 int snd_pcm_drain_done(snd_pcm_substream_t *substream) 928 { 929 return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP); 930 } 931 932 /* 933 * pause callbacks 934 */ 935 static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push) 936 { 937 snd_pcm_runtime_t *runtime = substream->runtime; 938 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 939 return -ENOSYS; 940 if (push) { 941 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 942 return -EBADFD; 943 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 944 return -EBADFD; 945 runtime->trigger_master = substream; 946 return 0; 947 } 948 949 static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push) 950 { 951 if (substream->runtime->trigger_master != substream) 952 return 0; 953 return substream->ops->trigger(substream, 954 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 955 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 956 } 957 958 static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push) 959 { 960 if (substream->runtime->trigger_master == substream) 961 substream->ops->trigger(substream, 962 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 963 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 964 } 965 966 static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push) 967 { 968 snd_pcm_runtime_t *runtime = substream->runtime; 969 snd_pcm_trigger_tstamp(substream); 970 if (push) { 971 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 972 if (substream->timer) 973 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp); 974 snd_pcm_tick_set(substream, 0); 975 wake_up(&runtime->sleep); 976 } else { 977 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 978 if (runtime->sleep_min) 979 snd_pcm_tick_prepare(substream); 980 if (substream->timer) 981 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp); 982 } 983 } 984 985 static struct action_ops snd_pcm_action_pause = { 986 .pre_action = snd_pcm_pre_pause, 987 .do_action = snd_pcm_do_pause, 988 .undo_action = snd_pcm_undo_pause, 989 .post_action = snd_pcm_post_pause 990 }; 991 992 /* 993 * Push/release the pause for all linked streams. 994 */ 995 static int snd_pcm_pause(snd_pcm_substream_t *substream, int push) 996 { 997 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 998 } 999 1000 #ifdef CONFIG_PM 1001 /* suspend */ 1002 1003 static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state) 1004 { 1005 snd_pcm_runtime_t *runtime = substream->runtime; 1006 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1007 return -EBUSY; 1008 runtime->trigger_master = substream; 1009 return 0; 1010 } 1011 1012 static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state) 1013 { 1014 snd_pcm_runtime_t *runtime = substream->runtime; 1015 if (runtime->trigger_master != substream) 1016 return 0; 1017 if (! snd_pcm_running(substream)) 1018 return 0; 1019 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1020 return 0; /* suspend unconditionally */ 1021 } 1022 1023 static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state) 1024 { 1025 snd_pcm_runtime_t *runtime = substream->runtime; 1026 snd_pcm_trigger_tstamp(substream); 1027 if (substream->timer) 1028 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp); 1029 runtime->status->suspended_state = runtime->status->state; 1030 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1031 snd_pcm_tick_set(substream, 0); 1032 wake_up(&runtime->sleep); 1033 } 1034 1035 static struct action_ops snd_pcm_action_suspend = { 1036 .pre_action = snd_pcm_pre_suspend, 1037 .do_action = snd_pcm_do_suspend, 1038 .post_action = snd_pcm_post_suspend 1039 }; 1040 1041 /** 1042 * snd_pcm_suspend 1043 * 1044 * Trigger SUSPEND to all linked streams. 1045 * After this call, all streams are changed to SUSPENDED state. 1046 */ 1047 int snd_pcm_suspend(snd_pcm_substream_t *substream) 1048 { 1049 int err; 1050 unsigned long flags; 1051 1052 snd_pcm_stream_lock_irqsave(substream, flags); 1053 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1054 snd_pcm_stream_unlock_irqrestore(substream, flags); 1055 return err; 1056 } 1057 1058 /** 1059 * snd_pcm_suspend_all 1060 * 1061 * Trigger SUSPEND to all substreams in the given pcm. 1062 * After this call, all streams are changed to SUSPENDED state. 1063 */ 1064 int snd_pcm_suspend_all(snd_pcm_t *pcm) 1065 { 1066 snd_pcm_substream_t *substream; 1067 int stream, err = 0; 1068 1069 for (stream = 0; stream < 2; stream++) { 1070 for (substream = pcm->streams[stream].substream; substream; substream = substream->next) { 1071 /* FIXME: the open/close code should lock this as well */ 1072 if (substream->runtime == NULL) 1073 continue; 1074 err = snd_pcm_suspend(substream); 1075 if (err < 0 && err != -EBUSY) 1076 return err; 1077 } 1078 } 1079 return 0; 1080 } 1081 1082 /* resume */ 1083 1084 static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state) 1085 { 1086 snd_pcm_runtime_t *runtime = substream->runtime; 1087 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1088 return -ENOSYS; 1089 runtime->trigger_master = substream; 1090 return 0; 1091 } 1092 1093 static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state) 1094 { 1095 snd_pcm_runtime_t *runtime = substream->runtime; 1096 if (runtime->trigger_master != substream) 1097 return 0; 1098 /* DMA not running previously? */ 1099 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1100 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1101 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1102 return 0; 1103 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1104 } 1105 1106 static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state) 1107 { 1108 if (substream->runtime->trigger_master == substream && 1109 snd_pcm_running(substream)) 1110 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1111 } 1112 1113 static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state) 1114 { 1115 snd_pcm_runtime_t *runtime = substream->runtime; 1116 snd_pcm_trigger_tstamp(substream); 1117 if (substream->timer) 1118 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp); 1119 runtime->status->state = runtime->status->suspended_state; 1120 if (runtime->sleep_min) 1121 snd_pcm_tick_prepare(substream); 1122 } 1123 1124 static struct action_ops snd_pcm_action_resume = { 1125 .pre_action = snd_pcm_pre_resume, 1126 .do_action = snd_pcm_do_resume, 1127 .undo_action = snd_pcm_undo_resume, 1128 .post_action = snd_pcm_post_resume 1129 }; 1130 1131 static int snd_pcm_resume(snd_pcm_substream_t *substream) 1132 { 1133 snd_card_t *card = substream->pcm->card; 1134 int res; 1135 1136 snd_power_lock(card); 1137 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) 1138 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1139 snd_power_unlock(card); 1140 return res; 1141 } 1142 1143 #else 1144 1145 static int snd_pcm_resume(snd_pcm_substream_t *substream) 1146 { 1147 return -ENOSYS; 1148 } 1149 1150 #endif /* CONFIG_PM */ 1151 1152 /* 1153 * xrun ioctl 1154 * 1155 * Change the RUNNING stream(s) to XRUN state. 1156 */ 1157 static int snd_pcm_xrun(snd_pcm_substream_t *substream) 1158 { 1159 snd_card_t *card = substream->pcm->card; 1160 snd_pcm_runtime_t *runtime = substream->runtime; 1161 int result; 1162 1163 snd_power_lock(card); 1164 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1165 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); 1166 if (result < 0) 1167 goto _unlock; 1168 } 1169 1170 snd_pcm_stream_lock_irq(substream); 1171 switch (runtime->status->state) { 1172 case SNDRV_PCM_STATE_XRUN: 1173 result = 0; /* already there */ 1174 break; 1175 case SNDRV_PCM_STATE_RUNNING: 1176 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1177 break; 1178 default: 1179 result = -EBADFD; 1180 } 1181 snd_pcm_stream_unlock_irq(substream); 1182 _unlock: 1183 snd_power_unlock(card); 1184 return result; 1185 } 1186 1187 /* 1188 * reset ioctl 1189 */ 1190 static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state) 1191 { 1192 snd_pcm_runtime_t *runtime = substream->runtime; 1193 switch (runtime->status->state) { 1194 case SNDRV_PCM_STATE_RUNNING: 1195 case SNDRV_PCM_STATE_PREPARED: 1196 case SNDRV_PCM_STATE_PAUSED: 1197 case SNDRV_PCM_STATE_SUSPENDED: 1198 return 0; 1199 default: 1200 return -EBADFD; 1201 } 1202 } 1203 1204 static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state) 1205 { 1206 snd_pcm_runtime_t *runtime = substream->runtime; 1207 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1208 if (err < 0) 1209 return err; 1210 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); 1211 runtime->hw_ptr_base = 0; 1212 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size; 1213 runtime->silence_start = runtime->status->hw_ptr; 1214 runtime->silence_filled = 0; 1215 return 0; 1216 } 1217 1218 static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state) 1219 { 1220 snd_pcm_runtime_t *runtime = substream->runtime; 1221 runtime->control->appl_ptr = runtime->status->hw_ptr; 1222 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1223 runtime->silence_size > 0) 1224 snd_pcm_playback_silence(substream, ULONG_MAX); 1225 } 1226 1227 static struct action_ops snd_pcm_action_reset = { 1228 .pre_action = snd_pcm_pre_reset, 1229 .do_action = snd_pcm_do_reset, 1230 .post_action = snd_pcm_post_reset 1231 }; 1232 1233 static int snd_pcm_reset(snd_pcm_substream_t *substream) 1234 { 1235 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1236 } 1237 1238 /* 1239 * prepare ioctl 1240 */ 1241 static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state) 1242 { 1243 snd_pcm_runtime_t *runtime = substream->runtime; 1244 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1245 return -EBADFD; 1246 if (snd_pcm_running(substream)) 1247 return -EBUSY; 1248 return 0; 1249 } 1250 1251 static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state) 1252 { 1253 int err; 1254 err = substream->ops->prepare(substream); 1255 if (err < 0) 1256 return err; 1257 return snd_pcm_do_reset(substream, 0); 1258 } 1259 1260 static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state) 1261 { 1262 snd_pcm_runtime_t *runtime = substream->runtime; 1263 runtime->control->appl_ptr = runtime->status->hw_ptr; 1264 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1265 } 1266 1267 static struct action_ops snd_pcm_action_prepare = { 1268 .pre_action = snd_pcm_pre_prepare, 1269 .do_action = snd_pcm_do_prepare, 1270 .post_action = snd_pcm_post_prepare 1271 }; 1272 1273 /** 1274 * snd_pcm_prepare 1275 */ 1276 int snd_pcm_prepare(snd_pcm_substream_t *substream) 1277 { 1278 int res; 1279 snd_card_t *card = substream->pcm->card; 1280 1281 snd_power_lock(card); 1282 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0) 1283 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0); 1284 snd_power_unlock(card); 1285 return res; 1286 } 1287 1288 /* 1289 * drain ioctl 1290 */ 1291 1292 static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state) 1293 { 1294 if (substream->ffile->f_flags & O_NONBLOCK) 1295 return -EAGAIN; 1296 substream->runtime->trigger_master = substream; 1297 return 0; 1298 } 1299 1300 static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state) 1301 { 1302 snd_pcm_runtime_t *runtime = substream->runtime; 1303 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1304 switch (runtime->status->state) { 1305 case SNDRV_PCM_STATE_PREPARED: 1306 /* start playback stream if possible */ 1307 if (! snd_pcm_playback_empty(substream)) { 1308 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1309 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1310 } 1311 break; 1312 case SNDRV_PCM_STATE_RUNNING: 1313 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1314 break; 1315 default: 1316 break; 1317 } 1318 } else { 1319 /* stop running stream */ 1320 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1321 int state = snd_pcm_capture_avail(runtime) > 0 ? 1322 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1323 snd_pcm_do_stop(substream, state); 1324 snd_pcm_post_stop(substream, state); 1325 } 1326 } 1327 return 0; 1328 } 1329 1330 static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state) 1331 { 1332 } 1333 1334 static struct action_ops snd_pcm_action_drain_init = { 1335 .pre_action = snd_pcm_pre_drain_init, 1336 .do_action = snd_pcm_do_drain_init, 1337 .post_action = snd_pcm_post_drain_init 1338 }; 1339 1340 struct drain_rec { 1341 snd_pcm_substream_t *substream; 1342 wait_queue_t wait; 1343 snd_pcm_uframes_t stop_threshold; 1344 }; 1345 1346 static int snd_pcm_drop(snd_pcm_substream_t *substream); 1347 1348 /* 1349 * Drain the stream(s). 1350 * When the substream is linked, sync until the draining of all playback streams 1351 * is finished. 1352 * After this call, all streams are supposed to be either SETUP or DRAINING 1353 * (capture only) state. 1354 */ 1355 static int snd_pcm_drain(snd_pcm_substream_t *substream) 1356 { 1357 snd_card_t *card; 1358 snd_pcm_runtime_t *runtime; 1359 struct list_head *pos; 1360 int result = 0; 1361 int i, num_drecs; 1362 struct drain_rec *drec, drec_tmp, *d; 1363 1364 snd_assert(substream != NULL, return -ENXIO); 1365 card = substream->pcm->card; 1366 runtime = substream->runtime; 1367 1368 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1369 return -EBADFD; 1370 1371 down_read(&snd_pcm_link_rwsem); 1372 snd_power_lock(card); 1373 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1374 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); 1375 if (result < 0) 1376 goto _unlock; 1377 } 1378 1379 /* allocate temporary record for drain sync */ 1380 if (snd_pcm_stream_linked(substream)) { 1381 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); 1382 if (! drec) { 1383 result = -ENOMEM; 1384 goto _unlock; 1385 } 1386 } else 1387 drec = &drec_tmp; 1388 1389 snd_pcm_stream_lock_irq(substream); 1390 /* resume pause */ 1391 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1392 snd_pcm_pause(substream, 0); 1393 1394 /* pre-start/stop - all running streams are changed to DRAINING state */ 1395 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1396 if (result < 0) 1397 goto _end; 1398 1399 /* check streams with PLAYBACK & DRAINING */ 1400 num_drecs = 0; 1401 snd_pcm_group_for_each(pos, substream) { 1402 snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos); 1403 runtime = s->runtime; 1404 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING) { 1405 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1406 continue; 1407 } 1408 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1409 d = &drec[num_drecs++]; 1410 d->substream = s; 1411 init_waitqueue_entry(&d->wait, current); 1412 add_wait_queue(&runtime->sleep, &d->wait); 1413 /* stop_threshold fixup to avoid endless loop when 1414 * stop_threshold > buffer_size 1415 */ 1416 d->stop_threshold = runtime->stop_threshold; 1417 if (runtime->stop_threshold > runtime->buffer_size) 1418 runtime->stop_threshold = runtime->buffer_size; 1419 } 1420 } 1421 1422 if (! num_drecs) 1423 goto _end; 1424 1425 for (;;) { 1426 long tout; 1427 if (signal_pending(current)) { 1428 result = -ERESTARTSYS; 1429 break; 1430 } 1431 set_current_state(TASK_INTERRUPTIBLE); 1432 snd_pcm_stream_unlock_irq(substream); 1433 snd_power_unlock(card); 1434 tout = schedule_timeout(10 * HZ); 1435 snd_power_lock(card); 1436 snd_pcm_stream_lock_irq(substream); 1437 if (tout == 0) { 1438 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1439 result = -ESTRPIPE; 1440 else { 1441 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1442 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1443 result = -EIO; 1444 } 1445 break; 1446 } 1447 /* all finished? */ 1448 for (i = 0; i < num_drecs; i++) { 1449 runtime = drec[i].substream->runtime; 1450 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) 1451 break; 1452 } 1453 if (i == num_drecs) 1454 break; 1455 } 1456 for (i = 0; i < num_drecs; i++) { 1457 d = &drec[i]; 1458 runtime = d->substream->runtime; 1459 remove_wait_queue(&runtime->sleep, &d->wait); 1460 runtime->stop_threshold = d->stop_threshold; 1461 } 1462 1463 _end: 1464 snd_pcm_stream_unlock_irq(substream); 1465 if (drec != &drec_tmp) 1466 kfree(drec); 1467 _unlock: 1468 snd_power_unlock(card); 1469 up_read(&snd_pcm_link_rwsem); 1470 1471 return result; 1472 } 1473 1474 /* 1475 * drop ioctl 1476 * 1477 * Immediately put all linked substreams into SETUP state. 1478 */ 1479 static int snd_pcm_drop(snd_pcm_substream_t *substream) 1480 { 1481 snd_pcm_runtime_t *runtime; 1482 snd_card_t *card; 1483 int result = 0; 1484 1485 snd_assert(substream != NULL, return -ENXIO); 1486 runtime = substream->runtime; 1487 card = substream->pcm->card; 1488 1489 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1490 return -EBADFD; 1491 1492 snd_power_lock(card); 1493 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1494 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile); 1495 if (result < 0) 1496 goto _unlock; 1497 } 1498 1499 snd_pcm_stream_lock_irq(substream); 1500 /* resume pause */ 1501 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1502 snd_pcm_pause(substream, 0); 1503 1504 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1505 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1506 snd_pcm_stream_unlock_irq(substream); 1507 _unlock: 1508 snd_power_unlock(card); 1509 return result; 1510 } 1511 1512 1513 /* WARNING: Don't forget to fput back the file */ 1514 extern int snd_major; 1515 static struct file *snd_pcm_file_fd(int fd) 1516 { 1517 struct file *file; 1518 struct inode *inode; 1519 unsigned short minor; 1520 file = fget(fd); 1521 if (!file) 1522 return NULL; 1523 inode = file->f_dentry->d_inode; 1524 if (!S_ISCHR(inode->i_mode) || 1525 imajor(inode) != snd_major) { 1526 fput(file); 1527 return NULL; 1528 } 1529 minor = iminor(inode); 1530 if (minor >= 256 || 1531 minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) { 1532 fput(file); 1533 return NULL; 1534 } 1535 return file; 1536 } 1537 1538 /* 1539 * PCM link handling 1540 */ 1541 static int snd_pcm_link(snd_pcm_substream_t *substream, int fd) 1542 { 1543 int res = 0; 1544 struct file *file; 1545 snd_pcm_file_t *pcm_file; 1546 snd_pcm_substream_t *substream1; 1547 1548 file = snd_pcm_file_fd(fd); 1549 if (!file) 1550 return -EBADFD; 1551 pcm_file = file->private_data; 1552 substream1 = pcm_file->substream; 1553 down_write(&snd_pcm_link_rwsem); 1554 write_lock_irq(&snd_pcm_link_rwlock); 1555 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1556 substream->runtime->status->state != substream1->runtime->status->state) { 1557 res = -EBADFD; 1558 goto _end; 1559 } 1560 if (snd_pcm_stream_linked(substream1)) { 1561 res = -EALREADY; 1562 goto _end; 1563 } 1564 if (!snd_pcm_stream_linked(substream)) { 1565 substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC); 1566 if (substream->group == NULL) { 1567 res = -ENOMEM; 1568 goto _end; 1569 } 1570 spin_lock_init(&substream->group->lock); 1571 INIT_LIST_HEAD(&substream->group->substreams); 1572 list_add_tail(&substream->link_list, &substream->group->substreams); 1573 substream->group->count = 1; 1574 } 1575 list_add_tail(&substream1->link_list, &substream->group->substreams); 1576 substream->group->count++; 1577 substream1->group = substream->group; 1578 _end: 1579 write_unlock_irq(&snd_pcm_link_rwlock); 1580 up_write(&snd_pcm_link_rwsem); 1581 fput(file); 1582 return res; 1583 } 1584 1585 static void relink_to_local(snd_pcm_substream_t *substream) 1586 { 1587 substream->group = &substream->self_group; 1588 INIT_LIST_HEAD(&substream->self_group.substreams); 1589 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1590 } 1591 1592 static int snd_pcm_unlink(snd_pcm_substream_t *substream) 1593 { 1594 struct list_head *pos; 1595 int res = 0; 1596 1597 down_write(&snd_pcm_link_rwsem); 1598 write_lock_irq(&snd_pcm_link_rwlock); 1599 if (!snd_pcm_stream_linked(substream)) { 1600 res = -EALREADY; 1601 goto _end; 1602 } 1603 list_del(&substream->link_list); 1604 substream->group->count--; 1605 if (substream->group->count == 1) { /* detach the last stream, too */ 1606 snd_pcm_group_for_each(pos, substream) { 1607 relink_to_local(snd_pcm_group_substream_entry(pos)); 1608 break; 1609 } 1610 kfree(substream->group); 1611 } 1612 relink_to_local(substream); 1613 _end: 1614 write_unlock_irq(&snd_pcm_link_rwlock); 1615 up_write(&snd_pcm_link_rwsem); 1616 return res; 1617 } 1618 1619 /* 1620 * hw configurator 1621 */ 1622 static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params, 1623 snd_pcm_hw_rule_t *rule) 1624 { 1625 snd_interval_t t; 1626 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1627 hw_param_interval_c(params, rule->deps[1]), &t); 1628 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1629 } 1630 1631 static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params, 1632 snd_pcm_hw_rule_t *rule) 1633 { 1634 snd_interval_t t; 1635 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1636 hw_param_interval_c(params, rule->deps[1]), &t); 1637 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1638 } 1639 1640 static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params, 1641 snd_pcm_hw_rule_t *rule) 1642 { 1643 snd_interval_t t; 1644 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1645 hw_param_interval_c(params, rule->deps[1]), 1646 (unsigned long) rule->private, &t); 1647 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1648 } 1649 1650 static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params, 1651 snd_pcm_hw_rule_t *rule) 1652 { 1653 snd_interval_t t; 1654 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1655 (unsigned long) rule->private, 1656 hw_param_interval_c(params, rule->deps[1]), &t); 1657 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1658 } 1659 1660 static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params, 1661 snd_pcm_hw_rule_t *rule) 1662 { 1663 unsigned int k; 1664 snd_interval_t *i = hw_param_interval(params, rule->deps[0]); 1665 snd_mask_t m; 1666 snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1667 snd_mask_any(&m); 1668 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1669 int bits; 1670 if (! snd_mask_test(mask, k)) 1671 continue; 1672 bits = snd_pcm_format_physical_width(k); 1673 if (bits <= 0) 1674 continue; /* ignore invalid formats */ 1675 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1676 snd_mask_reset(&m, k); 1677 } 1678 return snd_mask_refine(mask, &m); 1679 } 1680 1681 static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params, 1682 snd_pcm_hw_rule_t *rule) 1683 { 1684 snd_interval_t t; 1685 unsigned int k; 1686 t.min = UINT_MAX; 1687 t.max = 0; 1688 t.openmin = 0; 1689 t.openmax = 0; 1690 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1691 int bits; 1692 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1693 continue; 1694 bits = snd_pcm_format_physical_width(k); 1695 if (bits <= 0) 1696 continue; /* ignore invalid formats */ 1697 if (t.min > (unsigned)bits) 1698 t.min = bits; 1699 if (t.max < (unsigned)bits) 1700 t.max = bits; 1701 } 1702 t.integer = 1; 1703 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1704 } 1705 1706 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1707 #error "Change this table" 1708 #endif 1709 1710 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1711 48000, 64000, 88200, 96000, 176400, 192000 }; 1712 1713 static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params, 1714 snd_pcm_hw_rule_t *rule) 1715 { 1716 snd_pcm_hardware_t *hw = rule->private; 1717 return snd_interval_list(hw_param_interval(params, rule->var), 1718 ARRAY_SIZE(rates), rates, hw->rates); 1719 } 1720 1721 static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params, 1722 snd_pcm_hw_rule_t *rule) 1723 { 1724 snd_interval_t t; 1725 snd_pcm_substream_t *substream = rule->private; 1726 t.min = 0; 1727 t.max = substream->buffer_bytes_max; 1728 t.openmin = 0; 1729 t.openmax = 0; 1730 t.integer = 1; 1731 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1732 } 1733 1734 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream) 1735 { 1736 snd_pcm_runtime_t *runtime = substream->runtime; 1737 snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints; 1738 int k, err; 1739 1740 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1741 snd_mask_any(constrs_mask(constrs, k)); 1742 } 1743 1744 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1745 snd_interval_any(constrs_interval(constrs, k)); 1746 } 1747 1748 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1749 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1750 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1751 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1752 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1753 1754 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1755 snd_pcm_hw_rule_format, NULL, 1756 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1757 if (err < 0) 1758 return err; 1759 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1760 snd_pcm_hw_rule_sample_bits, NULL, 1761 SNDRV_PCM_HW_PARAM_FORMAT, 1762 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1763 if (err < 0) 1764 return err; 1765 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1766 snd_pcm_hw_rule_div, NULL, 1767 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1768 if (err < 0) 1769 return err; 1770 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1771 snd_pcm_hw_rule_mul, NULL, 1772 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1773 if (err < 0) 1774 return err; 1775 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1776 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1777 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1778 if (err < 0) 1779 return err; 1780 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1781 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1782 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1783 if (err < 0) 1784 return err; 1785 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1786 snd_pcm_hw_rule_div, NULL, 1787 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1788 if (err < 0) 1789 return err; 1790 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1791 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1792 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1793 if (err < 0) 1794 return err; 1795 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1796 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1797 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1798 if (err < 0) 1799 return err; 1800 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1801 snd_pcm_hw_rule_div, NULL, 1802 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1803 if (err < 0) 1804 return err; 1805 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1806 snd_pcm_hw_rule_div, NULL, 1807 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1808 if (err < 0) 1809 return err; 1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1811 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1812 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1813 if (err < 0) 1814 return err; 1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1816 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1817 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1818 if (err < 0) 1819 return err; 1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1821 snd_pcm_hw_rule_mul, NULL, 1822 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1823 if (err < 0) 1824 return err; 1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1826 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1827 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1828 if (err < 0) 1829 return err; 1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1831 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1832 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1833 if (err < 0) 1834 return err; 1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1836 snd_pcm_hw_rule_muldivk, (void*) 8, 1837 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1838 if (err < 0) 1839 return err; 1840 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1841 snd_pcm_hw_rule_muldivk, (void*) 8, 1842 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1843 if (err < 0) 1844 return err; 1845 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1846 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1847 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1848 if (err < 0) 1849 return err; 1850 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1851 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1852 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1853 if (err < 0) 1854 return err; 1855 return 0; 1856 } 1857 1858 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream) 1859 { 1860 snd_pcm_runtime_t *runtime = substream->runtime; 1861 snd_pcm_hardware_t *hw = &runtime->hw; 1862 int err; 1863 unsigned int mask = 0; 1864 1865 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1866 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1867 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1868 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1869 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1870 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1871 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1872 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1873 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1874 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1875 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1876 } 1877 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1878 snd_assert(err >= 0, return -EINVAL); 1879 1880 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1881 snd_assert(err >= 0, return -EINVAL); 1882 1883 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1884 snd_assert(err >= 0, return -EINVAL); 1885 1886 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1887 hw->channels_min, hw->channels_max); 1888 snd_assert(err >= 0, return -EINVAL); 1889 1890 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1891 hw->rate_min, hw->rate_max); 1892 snd_assert(err >= 0, return -EINVAL); 1893 1894 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1895 hw->period_bytes_min, hw->period_bytes_max); 1896 snd_assert(err >= 0, return -EINVAL); 1897 1898 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1899 hw->periods_min, hw->periods_max); 1900 snd_assert(err >= 0, return -EINVAL); 1901 1902 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1903 hw->period_bytes_min, hw->buffer_bytes_max); 1904 snd_assert(err >= 0, return -EINVAL); 1905 1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1907 snd_pcm_hw_rule_buffer_bytes_max, substream, 1908 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1909 if (err < 0) 1910 return err; 1911 1912 /* FIXME: remove */ 1913 if (runtime->dma_bytes) { 1914 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1915 snd_assert(err >= 0, return -EINVAL); 1916 } 1917 1918 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1919 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1920 snd_pcm_hw_rule_rate, hw, 1921 SNDRV_PCM_HW_PARAM_RATE, -1); 1922 if (err < 0) 1923 return err; 1924 } 1925 1926 /* FIXME: this belong to lowlevel */ 1927 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, 1928 1000000 / HZ, 1000000 / HZ); 1929 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1930 1931 return 0; 1932 } 1933 1934 static void snd_pcm_add_file(snd_pcm_str_t *str, 1935 snd_pcm_file_t *pcm_file) 1936 { 1937 pcm_file->next = str->files; 1938 str->files = pcm_file; 1939 } 1940 1941 static void snd_pcm_remove_file(snd_pcm_str_t *str, 1942 snd_pcm_file_t *pcm_file) 1943 { 1944 snd_pcm_file_t * pcm_file1; 1945 if (str->files == pcm_file) { 1946 str->files = pcm_file->next; 1947 } else { 1948 pcm_file1 = str->files; 1949 while (pcm_file1 && pcm_file1->next != pcm_file) 1950 pcm_file1 = pcm_file1->next; 1951 if (pcm_file1 != NULL) 1952 pcm_file1->next = pcm_file->next; 1953 } 1954 } 1955 1956 static int snd_pcm_release_file(snd_pcm_file_t * pcm_file) 1957 { 1958 snd_pcm_substream_t *substream; 1959 snd_pcm_runtime_t *runtime; 1960 snd_pcm_str_t * str; 1961 1962 snd_assert(pcm_file != NULL, return -ENXIO); 1963 substream = pcm_file->substream; 1964 snd_assert(substream != NULL, return -ENXIO); 1965 runtime = substream->runtime; 1966 str = substream->pstr; 1967 snd_pcm_unlink(substream); 1968 if (substream->open_flag) { 1969 if (substream->ops->hw_free != NULL) 1970 substream->ops->hw_free(substream); 1971 substream->ops->close(substream); 1972 substream->open_flag = 0; 1973 } 1974 substream->ffile = NULL; 1975 snd_pcm_remove_file(str, pcm_file); 1976 snd_pcm_release_substream(substream); 1977 kfree(pcm_file); 1978 return 0; 1979 } 1980 1981 static int snd_pcm_open_file(struct file *file, 1982 snd_pcm_t *pcm, 1983 int stream, 1984 snd_pcm_file_t **rpcm_file) 1985 { 1986 int err = 0; 1987 snd_pcm_file_t *pcm_file; 1988 snd_pcm_substream_t *substream; 1989 snd_pcm_str_t *str; 1990 1991 snd_assert(rpcm_file != NULL, return -EINVAL); 1992 *rpcm_file = NULL; 1993 1994 pcm_file = kcalloc(1, sizeof(*pcm_file), GFP_KERNEL); 1995 if (pcm_file == NULL) { 1996 return -ENOMEM; 1997 } 1998 1999 if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) { 2000 kfree(pcm_file); 2001 return err; 2002 } 2003 2004 str = substream->pstr; 2005 substream->file = pcm_file; 2006 substream->no_mmap_ctrl = 0; 2007 2008 pcm_file->substream = substream; 2009 2010 snd_pcm_add_file(str, pcm_file); 2011 2012 err = snd_pcm_hw_constraints_init(substream); 2013 if (err < 0) { 2014 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2015 snd_pcm_release_file(pcm_file); 2016 return err; 2017 } 2018 2019 if ((err = substream->ops->open(substream)) < 0) { 2020 snd_pcm_release_file(pcm_file); 2021 return err; 2022 } 2023 substream->open_flag = 1; 2024 2025 err = snd_pcm_hw_constraints_complete(substream); 2026 if (err < 0) { 2027 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2028 substream->ops->close(substream); 2029 snd_pcm_release_file(pcm_file); 2030 return err; 2031 } 2032 2033 substream->ffile = file; 2034 2035 file->private_data = pcm_file; 2036 *rpcm_file = pcm_file; 2037 return 0; 2038 } 2039 2040 static int snd_pcm_open(struct inode *inode, struct file *file) 2041 { 2042 int cardnum = SNDRV_MINOR_CARD(iminor(inode)); 2043 int device = SNDRV_MINOR_DEVICE(iminor(inode)); 2044 int err; 2045 snd_pcm_t *pcm; 2046 snd_pcm_file_t *pcm_file; 2047 wait_queue_t wait; 2048 2049 snd_runtime_check(device >= SNDRV_MINOR_PCM_PLAYBACK && device < SNDRV_MINOR_DEVICES, return -ENXIO); 2050 pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)]; 2051 if (pcm == NULL) { 2052 err = -ENODEV; 2053 goto __error1; 2054 } 2055 err = snd_card_file_add(pcm->card, file); 2056 if (err < 0) 2057 goto __error1; 2058 if (!try_module_get(pcm->card->module)) { 2059 err = -EFAULT; 2060 goto __error2; 2061 } 2062 init_waitqueue_entry(&wait, current); 2063 add_wait_queue(&pcm->open_wait, &wait); 2064 down(&pcm->open_mutex); 2065 while (1) { 2066 err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file); 2067 if (err >= 0) 2068 break; 2069 if (err == -EAGAIN) { 2070 if (file->f_flags & O_NONBLOCK) { 2071 err = -EBUSY; 2072 break; 2073 } 2074 } else 2075 break; 2076 set_current_state(TASK_INTERRUPTIBLE); 2077 up(&pcm->open_mutex); 2078 schedule(); 2079 down(&pcm->open_mutex); 2080 if (signal_pending(current)) { 2081 err = -ERESTARTSYS; 2082 break; 2083 } 2084 } 2085 remove_wait_queue(&pcm->open_wait, &wait); 2086 up(&pcm->open_mutex); 2087 if (err < 0) 2088 goto __error; 2089 return err; 2090 2091 __error: 2092 module_put(pcm->card->module); 2093 __error2: 2094 snd_card_file_remove(pcm->card, file); 2095 __error1: 2096 return err; 2097 } 2098 2099 static int snd_pcm_release(struct inode *inode, struct file *file) 2100 { 2101 snd_pcm_t *pcm; 2102 snd_pcm_substream_t *substream; 2103 snd_pcm_file_t *pcm_file; 2104 2105 pcm_file = file->private_data; 2106 substream = pcm_file->substream; 2107 snd_assert(substream != NULL, return -ENXIO); 2108 snd_assert(!atomic_read(&substream->runtime->mmap_count), ); 2109 pcm = substream->pcm; 2110 snd_pcm_drop(substream); 2111 fasync_helper(-1, file, 0, &substream->runtime->fasync); 2112 down(&pcm->open_mutex); 2113 snd_pcm_release_file(pcm_file); 2114 up(&pcm->open_mutex); 2115 wake_up(&pcm->open_wait); 2116 module_put(pcm->card->module); 2117 snd_card_file_remove(pcm->card, file); 2118 return 0; 2119 } 2120 2121 static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) 2122 { 2123 snd_pcm_runtime_t *runtime = substream->runtime; 2124 snd_pcm_sframes_t appl_ptr; 2125 snd_pcm_sframes_t ret; 2126 snd_pcm_sframes_t hw_avail; 2127 2128 if (frames == 0) 2129 return 0; 2130 2131 snd_pcm_stream_lock_irq(substream); 2132 switch (runtime->status->state) { 2133 case SNDRV_PCM_STATE_PREPARED: 2134 break; 2135 case SNDRV_PCM_STATE_DRAINING: 2136 case SNDRV_PCM_STATE_RUNNING: 2137 if (snd_pcm_update_hw_ptr(substream) >= 0) 2138 break; 2139 /* Fall through */ 2140 case SNDRV_PCM_STATE_XRUN: 2141 ret = -EPIPE; 2142 goto __end; 2143 default: 2144 ret = -EBADFD; 2145 goto __end; 2146 } 2147 2148 hw_avail = snd_pcm_playback_hw_avail(runtime); 2149 if (hw_avail <= 0) { 2150 ret = 0; 2151 goto __end; 2152 } 2153 if (frames > (snd_pcm_uframes_t)hw_avail) 2154 frames = hw_avail; 2155 else 2156 frames -= frames % runtime->xfer_align; 2157 appl_ptr = runtime->control->appl_ptr - frames; 2158 if (appl_ptr < 0) 2159 appl_ptr += runtime->boundary; 2160 runtime->control->appl_ptr = appl_ptr; 2161 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2162 runtime->sleep_min) 2163 snd_pcm_tick_prepare(substream); 2164 ret = frames; 2165 __end: 2166 snd_pcm_stream_unlock_irq(substream); 2167 return ret; 2168 } 2169 2170 static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) 2171 { 2172 snd_pcm_runtime_t *runtime = substream->runtime; 2173 snd_pcm_sframes_t appl_ptr; 2174 snd_pcm_sframes_t ret; 2175 snd_pcm_sframes_t hw_avail; 2176 2177 if (frames == 0) 2178 return 0; 2179 2180 snd_pcm_stream_lock_irq(substream); 2181 switch (runtime->status->state) { 2182 case SNDRV_PCM_STATE_PREPARED: 2183 case SNDRV_PCM_STATE_DRAINING: 2184 break; 2185 case SNDRV_PCM_STATE_RUNNING: 2186 if (snd_pcm_update_hw_ptr(substream) >= 0) 2187 break; 2188 /* Fall through */ 2189 case SNDRV_PCM_STATE_XRUN: 2190 ret = -EPIPE; 2191 goto __end; 2192 default: 2193 ret = -EBADFD; 2194 goto __end; 2195 } 2196 2197 hw_avail = snd_pcm_capture_hw_avail(runtime); 2198 if (hw_avail <= 0) { 2199 ret = 0; 2200 goto __end; 2201 } 2202 if (frames > (snd_pcm_uframes_t)hw_avail) 2203 frames = hw_avail; 2204 else 2205 frames -= frames % runtime->xfer_align; 2206 appl_ptr = runtime->control->appl_ptr - frames; 2207 if (appl_ptr < 0) 2208 appl_ptr += runtime->boundary; 2209 runtime->control->appl_ptr = appl_ptr; 2210 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2211 runtime->sleep_min) 2212 snd_pcm_tick_prepare(substream); 2213 ret = frames; 2214 __end: 2215 snd_pcm_stream_unlock_irq(substream); 2216 return ret; 2217 } 2218 2219 static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) 2220 { 2221 snd_pcm_runtime_t *runtime = substream->runtime; 2222 snd_pcm_sframes_t appl_ptr; 2223 snd_pcm_sframes_t ret; 2224 snd_pcm_sframes_t avail; 2225 2226 if (frames == 0) 2227 return 0; 2228 2229 snd_pcm_stream_lock_irq(substream); 2230 switch (runtime->status->state) { 2231 case SNDRV_PCM_STATE_PREPARED: 2232 case SNDRV_PCM_STATE_PAUSED: 2233 break; 2234 case SNDRV_PCM_STATE_DRAINING: 2235 case SNDRV_PCM_STATE_RUNNING: 2236 if (snd_pcm_update_hw_ptr(substream) >= 0) 2237 break; 2238 /* Fall through */ 2239 case SNDRV_PCM_STATE_XRUN: 2240 ret = -EPIPE; 2241 goto __end; 2242 default: 2243 ret = -EBADFD; 2244 goto __end; 2245 } 2246 2247 avail = snd_pcm_playback_avail(runtime); 2248 if (avail <= 0) { 2249 ret = 0; 2250 goto __end; 2251 } 2252 if (frames > (snd_pcm_uframes_t)avail) 2253 frames = avail; 2254 else 2255 frames -= frames % runtime->xfer_align; 2256 appl_ptr = runtime->control->appl_ptr + frames; 2257 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2258 appl_ptr -= runtime->boundary; 2259 runtime->control->appl_ptr = appl_ptr; 2260 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2261 runtime->sleep_min) 2262 snd_pcm_tick_prepare(substream); 2263 ret = frames; 2264 __end: 2265 snd_pcm_stream_unlock_irq(substream); 2266 return ret; 2267 } 2268 2269 static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames) 2270 { 2271 snd_pcm_runtime_t *runtime = substream->runtime; 2272 snd_pcm_sframes_t appl_ptr; 2273 snd_pcm_sframes_t ret; 2274 snd_pcm_sframes_t avail; 2275 2276 if (frames == 0) 2277 return 0; 2278 2279 snd_pcm_stream_lock_irq(substream); 2280 switch (runtime->status->state) { 2281 case SNDRV_PCM_STATE_PREPARED: 2282 case SNDRV_PCM_STATE_DRAINING: 2283 case SNDRV_PCM_STATE_PAUSED: 2284 break; 2285 case SNDRV_PCM_STATE_RUNNING: 2286 if (snd_pcm_update_hw_ptr(substream) >= 0) 2287 break; 2288 /* Fall through */ 2289 case SNDRV_PCM_STATE_XRUN: 2290 ret = -EPIPE; 2291 goto __end; 2292 default: 2293 ret = -EBADFD; 2294 goto __end; 2295 } 2296 2297 avail = snd_pcm_capture_avail(runtime); 2298 if (avail <= 0) { 2299 ret = 0; 2300 goto __end; 2301 } 2302 if (frames > (snd_pcm_uframes_t)avail) 2303 frames = avail; 2304 else 2305 frames -= frames % runtime->xfer_align; 2306 appl_ptr = runtime->control->appl_ptr + frames; 2307 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2308 appl_ptr -= runtime->boundary; 2309 runtime->control->appl_ptr = appl_ptr; 2310 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2311 runtime->sleep_min) 2312 snd_pcm_tick_prepare(substream); 2313 ret = frames; 2314 __end: 2315 snd_pcm_stream_unlock_irq(substream); 2316 return ret; 2317 } 2318 2319 static int snd_pcm_hwsync(snd_pcm_substream_t *substream) 2320 { 2321 snd_pcm_runtime_t *runtime = substream->runtime; 2322 int err; 2323 2324 snd_pcm_stream_lock_irq(substream); 2325 switch (runtime->status->state) { 2326 case SNDRV_PCM_STATE_DRAINING: 2327 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2328 goto __badfd; 2329 case SNDRV_PCM_STATE_RUNNING: 2330 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2331 break; 2332 /* Fall through */ 2333 case SNDRV_PCM_STATE_PREPARED: 2334 case SNDRV_PCM_STATE_SUSPENDED: 2335 err = 0; 2336 break; 2337 case SNDRV_PCM_STATE_XRUN: 2338 err = -EPIPE; 2339 break; 2340 default: 2341 __badfd: 2342 err = -EBADFD; 2343 break; 2344 } 2345 snd_pcm_stream_unlock_irq(substream); 2346 return err; 2347 } 2348 2349 static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res) 2350 { 2351 snd_pcm_runtime_t *runtime = substream->runtime; 2352 int err; 2353 snd_pcm_sframes_t n = 0; 2354 2355 snd_pcm_stream_lock_irq(substream); 2356 switch (runtime->status->state) { 2357 case SNDRV_PCM_STATE_DRAINING: 2358 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2359 goto __badfd; 2360 case SNDRV_PCM_STATE_RUNNING: 2361 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2362 break; 2363 /* Fall through */ 2364 case SNDRV_PCM_STATE_PREPARED: 2365 case SNDRV_PCM_STATE_SUSPENDED: 2366 err = 0; 2367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2368 n = snd_pcm_playback_hw_avail(runtime); 2369 else 2370 n = snd_pcm_capture_avail(runtime); 2371 break; 2372 case SNDRV_PCM_STATE_XRUN: 2373 err = -EPIPE; 2374 break; 2375 default: 2376 __badfd: 2377 err = -EBADFD; 2378 break; 2379 } 2380 snd_pcm_stream_unlock_irq(substream); 2381 if (!err) 2382 if (put_user(n, res)) 2383 err = -EFAULT; 2384 return err; 2385 } 2386 2387 static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr) 2388 { 2389 snd_pcm_runtime_t *runtime = substream->runtime; 2390 struct sndrv_pcm_sync_ptr sync_ptr; 2391 volatile struct sndrv_pcm_mmap_status *status; 2392 volatile struct sndrv_pcm_mmap_control *control; 2393 int err; 2394 2395 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2396 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2397 return -EFAULT; 2398 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control))) 2399 return -EFAULT; 2400 status = runtime->status; 2401 control = runtime->control; 2402 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2403 err = snd_pcm_hwsync(substream); 2404 if (err < 0) 2405 return err; 2406 } 2407 snd_pcm_stream_lock_irq(substream); 2408 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2409 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2410 else 2411 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2412 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2413 control->avail_min = sync_ptr.c.control.avail_min; 2414 else 2415 sync_ptr.c.control.avail_min = control->avail_min; 2416 sync_ptr.s.status.state = status->state; 2417 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2418 sync_ptr.s.status.tstamp = status->tstamp; 2419 sync_ptr.s.status.suspended_state = status->suspended_state; 2420 snd_pcm_stream_unlock_irq(substream); 2421 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2422 return -EFAULT; 2423 return 0; 2424 } 2425 2426 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, 2427 unsigned int cmd, void __user *arg); 2428 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, 2429 unsigned int cmd, void __user *arg); 2430 2431 static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream, 2432 unsigned int cmd, void __user *arg) 2433 { 2434 snd_assert(substream != NULL, return -ENXIO); 2435 2436 switch (cmd) { 2437 case SNDRV_PCM_IOCTL_PVERSION: 2438 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2439 case SNDRV_PCM_IOCTL_INFO: 2440 return snd_pcm_info_user(substream, arg); 2441 case SNDRV_PCM_IOCTL_TSTAMP: 2442 { 2443 int xarg; 2444 if (get_user(xarg, (int __user *)arg)) 2445 return -EFAULT; 2446 substream->runtime->tstamp_timespec = xarg ? 1 : 0; 2447 return 0; 2448 } 2449 case SNDRV_PCM_IOCTL_HW_REFINE: 2450 return snd_pcm_hw_refine_user(substream, arg); 2451 case SNDRV_PCM_IOCTL_HW_PARAMS: 2452 return snd_pcm_hw_params_user(substream, arg); 2453 case SNDRV_PCM_IOCTL_HW_FREE: 2454 return snd_pcm_hw_free(substream); 2455 case SNDRV_PCM_IOCTL_SW_PARAMS: 2456 return snd_pcm_sw_params_user(substream, arg); 2457 case SNDRV_PCM_IOCTL_STATUS: 2458 return snd_pcm_status_user(substream, arg); 2459 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2460 return snd_pcm_channel_info_user(substream, arg); 2461 case SNDRV_PCM_IOCTL_PREPARE: 2462 return snd_pcm_prepare(substream); 2463 case SNDRV_PCM_IOCTL_RESET: 2464 return snd_pcm_reset(substream); 2465 case SNDRV_PCM_IOCTL_START: 2466 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2467 case SNDRV_PCM_IOCTL_LINK: 2468 return snd_pcm_link(substream, (int)(unsigned long) arg); 2469 case SNDRV_PCM_IOCTL_UNLINK: 2470 return snd_pcm_unlink(substream); 2471 case SNDRV_PCM_IOCTL_RESUME: 2472 return snd_pcm_resume(substream); 2473 case SNDRV_PCM_IOCTL_XRUN: 2474 return snd_pcm_xrun(substream); 2475 case SNDRV_PCM_IOCTL_HWSYNC: 2476 return snd_pcm_hwsync(substream); 2477 case SNDRV_PCM_IOCTL_DELAY: 2478 return snd_pcm_delay(substream, arg); 2479 case SNDRV_PCM_IOCTL_SYNC_PTR: 2480 return snd_pcm_sync_ptr(substream, arg); 2481 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2482 return snd_pcm_hw_refine_old_user(substream, arg); 2483 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2484 return snd_pcm_hw_params_old_user(substream, arg); 2485 case SNDRV_PCM_IOCTL_DRAIN: 2486 return snd_pcm_drain(substream); 2487 case SNDRV_PCM_IOCTL_DROP: 2488 return snd_pcm_drop(substream); 2489 } 2490 snd_printd("unknown ioctl = 0x%x\n", cmd); 2491 return -ENOTTY; 2492 } 2493 2494 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream, 2495 unsigned int cmd, void __user *arg) 2496 { 2497 snd_assert(substream != NULL, return -ENXIO); 2498 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); 2499 switch (cmd) { 2500 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2501 { 2502 snd_xferi_t xferi; 2503 snd_xferi_t __user *_xferi = arg; 2504 snd_pcm_runtime_t *runtime = substream->runtime; 2505 snd_pcm_sframes_t result; 2506 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2507 return -EBADFD; 2508 if (put_user(0, &_xferi->result)) 2509 return -EFAULT; 2510 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2511 return -EFAULT; 2512 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2513 __put_user(result, &_xferi->result); 2514 return result < 0 ? result : 0; 2515 } 2516 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2517 { 2518 snd_xfern_t xfern; 2519 snd_xfern_t __user *_xfern = arg; 2520 snd_pcm_runtime_t *runtime = substream->runtime; 2521 void __user **bufs; 2522 snd_pcm_sframes_t result; 2523 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2524 return -EBADFD; 2525 if (runtime->channels > 128) 2526 return -EINVAL; 2527 if (put_user(0, &_xfern->result)) 2528 return -EFAULT; 2529 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2530 return -EFAULT; 2531 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2532 if (bufs == NULL) 2533 return -ENOMEM; 2534 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2535 kfree(bufs); 2536 return -EFAULT; 2537 } 2538 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2539 kfree(bufs); 2540 __put_user(result, &_xfern->result); 2541 return result < 0 ? result : 0; 2542 } 2543 case SNDRV_PCM_IOCTL_REWIND: 2544 { 2545 snd_pcm_uframes_t frames; 2546 snd_pcm_uframes_t __user *_frames = arg; 2547 snd_pcm_sframes_t result; 2548 if (get_user(frames, _frames)) 2549 return -EFAULT; 2550 if (put_user(0, _frames)) 2551 return -EFAULT; 2552 result = snd_pcm_playback_rewind(substream, frames); 2553 __put_user(result, _frames); 2554 return result < 0 ? result : 0; 2555 } 2556 case SNDRV_PCM_IOCTL_FORWARD: 2557 { 2558 snd_pcm_uframes_t frames; 2559 snd_pcm_uframes_t __user *_frames = arg; 2560 snd_pcm_sframes_t result; 2561 if (get_user(frames, _frames)) 2562 return -EFAULT; 2563 if (put_user(0, _frames)) 2564 return -EFAULT; 2565 result = snd_pcm_playback_forward(substream, frames); 2566 __put_user(result, _frames); 2567 return result < 0 ? result : 0; 2568 } 2569 case SNDRV_PCM_IOCTL_PAUSE: 2570 { 2571 int res; 2572 snd_pcm_stream_lock_irq(substream); 2573 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2574 snd_pcm_stream_unlock_irq(substream); 2575 return res; 2576 } 2577 } 2578 return snd_pcm_common_ioctl1(substream, cmd, arg); 2579 } 2580 2581 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream, 2582 unsigned int cmd, void __user *arg) 2583 { 2584 snd_assert(substream != NULL, return -ENXIO); 2585 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); 2586 switch (cmd) { 2587 case SNDRV_PCM_IOCTL_READI_FRAMES: 2588 { 2589 snd_xferi_t xferi; 2590 snd_xferi_t __user *_xferi = arg; 2591 snd_pcm_runtime_t *runtime = substream->runtime; 2592 snd_pcm_sframes_t result; 2593 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2594 return -EBADFD; 2595 if (put_user(0, &_xferi->result)) 2596 return -EFAULT; 2597 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2598 return -EFAULT; 2599 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2600 __put_user(result, &_xferi->result); 2601 return result < 0 ? result : 0; 2602 } 2603 case SNDRV_PCM_IOCTL_READN_FRAMES: 2604 { 2605 snd_xfern_t xfern; 2606 snd_xfern_t __user *_xfern = arg; 2607 snd_pcm_runtime_t *runtime = substream->runtime; 2608 void *bufs; 2609 snd_pcm_sframes_t result; 2610 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2611 return -EBADFD; 2612 if (runtime->channels > 128) 2613 return -EINVAL; 2614 if (put_user(0, &_xfern->result)) 2615 return -EFAULT; 2616 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2617 return -EFAULT; 2618 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2619 if (bufs == NULL) 2620 return -ENOMEM; 2621 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2622 kfree(bufs); 2623 return -EFAULT; 2624 } 2625 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2626 kfree(bufs); 2627 __put_user(result, &_xfern->result); 2628 return result < 0 ? result : 0; 2629 } 2630 case SNDRV_PCM_IOCTL_REWIND: 2631 { 2632 snd_pcm_uframes_t frames; 2633 snd_pcm_uframes_t __user *_frames = arg; 2634 snd_pcm_sframes_t result; 2635 if (get_user(frames, _frames)) 2636 return -EFAULT; 2637 if (put_user(0, _frames)) 2638 return -EFAULT; 2639 result = snd_pcm_capture_rewind(substream, frames); 2640 __put_user(result, _frames); 2641 return result < 0 ? result : 0; 2642 } 2643 case SNDRV_PCM_IOCTL_FORWARD: 2644 { 2645 snd_pcm_uframes_t frames; 2646 snd_pcm_uframes_t __user *_frames = arg; 2647 snd_pcm_sframes_t result; 2648 if (get_user(frames, _frames)) 2649 return -EFAULT; 2650 if (put_user(0, _frames)) 2651 return -EFAULT; 2652 result = snd_pcm_capture_forward(substream, frames); 2653 __put_user(result, _frames); 2654 return result < 0 ? result : 0; 2655 } 2656 } 2657 return snd_pcm_common_ioctl1(substream, cmd, arg); 2658 } 2659 2660 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2661 { 2662 snd_pcm_file_t *pcm_file; 2663 2664 pcm_file = file->private_data; 2665 2666 if (((cmd >> 8) & 0xff) != 'A') 2667 return -ENOTTY; 2668 2669 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg); 2670 } 2671 2672 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2673 { 2674 snd_pcm_file_t *pcm_file; 2675 2676 pcm_file = file->private_data; 2677 2678 if (((cmd >> 8) & 0xff) != 'A') 2679 return -ENOTTY; 2680 2681 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg); 2682 } 2683 2684 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, 2685 unsigned int cmd, void *arg) 2686 { 2687 mm_segment_t fs; 2688 int result; 2689 2690 fs = snd_enter_user(); 2691 result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg); 2692 snd_leave_user(fs); 2693 return result; 2694 } 2695 2696 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, 2697 unsigned int cmd, void *arg) 2698 { 2699 mm_segment_t fs; 2700 int result; 2701 2702 fs = snd_enter_user(); 2703 result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg); 2704 snd_leave_user(fs); 2705 return result; 2706 } 2707 2708 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, 2709 unsigned int cmd, void *arg) 2710 { 2711 switch (substream->stream) { 2712 case SNDRV_PCM_STREAM_PLAYBACK: 2713 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg); 2714 case SNDRV_PCM_STREAM_CAPTURE: 2715 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg); 2716 default: 2717 return -EINVAL; 2718 } 2719 } 2720 2721 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset) 2722 { 2723 snd_pcm_file_t *pcm_file; 2724 snd_pcm_substream_t *substream; 2725 snd_pcm_runtime_t *runtime; 2726 snd_pcm_sframes_t result; 2727 2728 pcm_file = file->private_data; 2729 substream = pcm_file->substream; 2730 snd_assert(substream != NULL, return -ENXIO); 2731 runtime = substream->runtime; 2732 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2733 return -EBADFD; 2734 if (!frame_aligned(runtime, count)) 2735 return -EINVAL; 2736 count = bytes_to_frames(runtime, count); 2737 result = snd_pcm_lib_read(substream, buf, count); 2738 if (result > 0) 2739 result = frames_to_bytes(runtime, result); 2740 return result; 2741 } 2742 2743 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset) 2744 { 2745 snd_pcm_file_t *pcm_file; 2746 snd_pcm_substream_t *substream; 2747 snd_pcm_runtime_t *runtime; 2748 snd_pcm_sframes_t result; 2749 2750 pcm_file = file->private_data; 2751 substream = pcm_file->substream; 2752 snd_assert(substream != NULL, result = -ENXIO; goto end); 2753 runtime = substream->runtime; 2754 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2755 result = -EBADFD; 2756 goto end; 2757 } 2758 if (!frame_aligned(runtime, count)) { 2759 result = -EINVAL; 2760 goto end; 2761 } 2762 count = bytes_to_frames(runtime, count); 2763 result = snd_pcm_lib_write(substream, buf, count); 2764 if (result > 0) 2765 result = frames_to_bytes(runtime, result); 2766 end: 2767 return result; 2768 } 2769 2770 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, 2771 unsigned long count, loff_t * offset) 2772 2773 { 2774 snd_pcm_file_t *pcm_file; 2775 snd_pcm_substream_t *substream; 2776 snd_pcm_runtime_t *runtime; 2777 snd_pcm_sframes_t result; 2778 unsigned long i; 2779 void __user **bufs; 2780 snd_pcm_uframes_t frames; 2781 2782 pcm_file = file->private_data; 2783 substream = pcm_file->substream; 2784 snd_assert(substream != NULL, return -ENXIO); 2785 runtime = substream->runtime; 2786 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2787 return -EBADFD; 2788 if (count > 1024 || count != runtime->channels) 2789 return -EINVAL; 2790 if (!frame_aligned(runtime, _vector->iov_len)) 2791 return -EINVAL; 2792 frames = bytes_to_samples(runtime, _vector->iov_len); 2793 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2794 if (bufs == NULL) 2795 return -ENOMEM; 2796 for (i = 0; i < count; ++i) 2797 bufs[i] = _vector[i].iov_base; 2798 result = snd_pcm_lib_readv(substream, bufs, frames); 2799 if (result > 0) 2800 result = frames_to_bytes(runtime, result); 2801 kfree(bufs); 2802 return result; 2803 } 2804 2805 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, 2806 unsigned long count, loff_t * offset) 2807 { 2808 snd_pcm_file_t *pcm_file; 2809 snd_pcm_substream_t *substream; 2810 snd_pcm_runtime_t *runtime; 2811 snd_pcm_sframes_t result; 2812 unsigned long i; 2813 void __user **bufs; 2814 snd_pcm_uframes_t frames; 2815 2816 pcm_file = file->private_data; 2817 substream = pcm_file->substream; 2818 snd_assert(substream != NULL, result = -ENXIO; goto end); 2819 runtime = substream->runtime; 2820 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2821 result = -EBADFD; 2822 goto end; 2823 } 2824 if (count > 128 || count != runtime->channels || 2825 !frame_aligned(runtime, _vector->iov_len)) { 2826 result = -EINVAL; 2827 goto end; 2828 } 2829 frames = bytes_to_samples(runtime, _vector->iov_len); 2830 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2831 if (bufs == NULL) 2832 return -ENOMEM; 2833 for (i = 0; i < count; ++i) 2834 bufs[i] = _vector[i].iov_base; 2835 result = snd_pcm_lib_writev(substream, bufs, frames); 2836 if (result > 0) 2837 result = frames_to_bytes(runtime, result); 2838 kfree(bufs); 2839 end: 2840 return result; 2841 } 2842 2843 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2844 { 2845 snd_pcm_file_t *pcm_file; 2846 snd_pcm_substream_t *substream; 2847 snd_pcm_runtime_t *runtime; 2848 unsigned int mask; 2849 snd_pcm_uframes_t avail; 2850 2851 pcm_file = file->private_data; 2852 2853 substream = pcm_file->substream; 2854 snd_assert(substream != NULL, return -ENXIO); 2855 runtime = substream->runtime; 2856 2857 poll_wait(file, &runtime->sleep, wait); 2858 2859 snd_pcm_stream_lock_irq(substream); 2860 avail = snd_pcm_playback_avail(runtime); 2861 switch (runtime->status->state) { 2862 case SNDRV_PCM_STATE_RUNNING: 2863 case SNDRV_PCM_STATE_PREPARED: 2864 case SNDRV_PCM_STATE_PAUSED: 2865 if (avail >= runtime->control->avail_min) { 2866 mask = POLLOUT | POLLWRNORM; 2867 break; 2868 } 2869 /* Fall through */ 2870 case SNDRV_PCM_STATE_DRAINING: 2871 mask = 0; 2872 break; 2873 default: 2874 mask = POLLOUT | POLLWRNORM | POLLERR; 2875 break; 2876 } 2877 snd_pcm_stream_unlock_irq(substream); 2878 return mask; 2879 } 2880 2881 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2882 { 2883 snd_pcm_file_t *pcm_file; 2884 snd_pcm_substream_t *substream; 2885 snd_pcm_runtime_t *runtime; 2886 unsigned int mask; 2887 snd_pcm_uframes_t avail; 2888 2889 pcm_file = file->private_data; 2890 2891 substream = pcm_file->substream; 2892 snd_assert(substream != NULL, return -ENXIO); 2893 runtime = substream->runtime; 2894 2895 poll_wait(file, &runtime->sleep, wait); 2896 2897 snd_pcm_stream_lock_irq(substream); 2898 avail = snd_pcm_capture_avail(runtime); 2899 switch (runtime->status->state) { 2900 case SNDRV_PCM_STATE_RUNNING: 2901 case SNDRV_PCM_STATE_PREPARED: 2902 case SNDRV_PCM_STATE_PAUSED: 2903 if (avail >= runtime->control->avail_min) { 2904 mask = POLLIN | POLLRDNORM; 2905 break; 2906 } 2907 mask = 0; 2908 break; 2909 case SNDRV_PCM_STATE_DRAINING: 2910 if (avail > 0) { 2911 mask = POLLIN | POLLRDNORM; 2912 break; 2913 } 2914 /* Fall through */ 2915 default: 2916 mask = POLLIN | POLLRDNORM | POLLERR; 2917 break; 2918 } 2919 snd_pcm_stream_unlock_irq(substream); 2920 return mask; 2921 } 2922 2923 /* 2924 * mmap support 2925 */ 2926 2927 /* 2928 * Only on coherent architectures, we can mmap the status and the control records 2929 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2930 */ 2931 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2932 /* 2933 * mmap status record 2934 */ 2935 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type) 2936 { 2937 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 2938 snd_pcm_runtime_t *runtime; 2939 struct page * page; 2940 2941 if (substream == NULL) 2942 return NOPAGE_OOM; 2943 runtime = substream->runtime; 2944 page = virt_to_page(runtime->status); 2945 if (!PageReserved(page)) 2946 get_page(page); 2947 if (type) 2948 *type = VM_FAULT_MINOR; 2949 return page; 2950 } 2951 2952 static struct vm_operations_struct snd_pcm_vm_ops_status = 2953 { 2954 .nopage = snd_pcm_mmap_status_nopage, 2955 }; 2956 2957 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, 2958 struct vm_area_struct *area) 2959 { 2960 snd_pcm_runtime_t *runtime; 2961 long size; 2962 if (!(area->vm_flags & VM_READ)) 2963 return -EINVAL; 2964 runtime = substream->runtime; 2965 snd_assert(runtime != NULL, return -EAGAIN); 2966 size = area->vm_end - area->vm_start; 2967 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))) 2968 return -EINVAL; 2969 area->vm_ops = &snd_pcm_vm_ops_status; 2970 area->vm_private_data = substream; 2971 area->vm_flags |= VM_RESERVED; 2972 return 0; 2973 } 2974 2975 /* 2976 * mmap control record 2977 */ 2978 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type) 2979 { 2980 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 2981 snd_pcm_runtime_t *runtime; 2982 struct page * page; 2983 2984 if (substream == NULL) 2985 return NOPAGE_OOM; 2986 runtime = substream->runtime; 2987 page = virt_to_page(runtime->control); 2988 if (!PageReserved(page)) 2989 get_page(page); 2990 if (type) 2991 *type = VM_FAULT_MINOR; 2992 return page; 2993 } 2994 2995 static struct vm_operations_struct snd_pcm_vm_ops_control = 2996 { 2997 .nopage = snd_pcm_mmap_control_nopage, 2998 }; 2999 3000 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, 3001 struct vm_area_struct *area) 3002 { 3003 snd_pcm_runtime_t *runtime; 3004 long size; 3005 if (!(area->vm_flags & VM_READ)) 3006 return -EINVAL; 3007 runtime = substream->runtime; 3008 snd_assert(runtime != NULL, return -EAGAIN); 3009 size = area->vm_end - area->vm_start; 3010 if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t))) 3011 return -EINVAL; 3012 area->vm_ops = &snd_pcm_vm_ops_control; 3013 area->vm_private_data = substream; 3014 area->vm_flags |= VM_RESERVED; 3015 return 0; 3016 } 3017 #else /* ! coherent mmap */ 3018 /* 3019 * don't support mmap for status and control records. 3020 */ 3021 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file, 3022 struct vm_area_struct *area) 3023 { 3024 return -ENXIO; 3025 } 3026 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file, 3027 struct vm_area_struct *area) 3028 { 3029 return -ENXIO; 3030 } 3031 #endif /* coherent mmap */ 3032 3033 /* 3034 * nopage callback for mmapping a RAM page 3035 */ 3036 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type) 3037 { 3038 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data; 3039 snd_pcm_runtime_t *runtime; 3040 unsigned long offset; 3041 struct page * page; 3042 void *vaddr; 3043 size_t dma_bytes; 3044 3045 if (substream == NULL) 3046 return NOPAGE_OOM; 3047 runtime = substream->runtime; 3048 offset = area->vm_pgoff << PAGE_SHIFT; 3049 offset += address - area->vm_start; 3050 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); 3051 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3052 if (offset > dma_bytes - PAGE_SIZE) 3053 return NOPAGE_SIGBUS; 3054 if (substream->ops->page) { 3055 page = substream->ops->page(substream, offset); 3056 if (! page) 3057 return NOPAGE_OOM; 3058 } else { 3059 vaddr = runtime->dma_area + offset; 3060 page = virt_to_page(vaddr); 3061 } 3062 if (!PageReserved(page)) 3063 get_page(page); 3064 if (type) 3065 *type = VM_FAULT_MINOR; 3066 return page; 3067 } 3068 3069 static struct vm_operations_struct snd_pcm_vm_ops_data = 3070 { 3071 .open = snd_pcm_mmap_data_open, 3072 .close = snd_pcm_mmap_data_close, 3073 .nopage = snd_pcm_mmap_data_nopage, 3074 }; 3075 3076 /* 3077 * mmap the DMA buffer on RAM 3078 */ 3079 static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area) 3080 { 3081 area->vm_ops = &snd_pcm_vm_ops_data; 3082 area->vm_private_data = substream; 3083 area->vm_flags |= VM_RESERVED; 3084 atomic_inc(&substream->runtime->mmap_count); 3085 return 0; 3086 } 3087 3088 /* 3089 * mmap the DMA buffer on I/O memory area 3090 */ 3091 #if SNDRV_PCM_INFO_MMAP_IOMEM 3092 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3093 { 3094 .open = snd_pcm_mmap_data_open, 3095 .close = snd_pcm_mmap_data_close, 3096 }; 3097 3098 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area) 3099 { 3100 long size; 3101 unsigned long offset; 3102 3103 #ifdef pgprot_noncached 3104 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3105 #endif 3106 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3107 area->vm_private_data = substream; 3108 area->vm_flags |= VM_IO; 3109 size = area->vm_end - area->vm_start; 3110 offset = area->vm_pgoff << PAGE_SHIFT; 3111 if (io_remap_pfn_range(area, area->vm_start, 3112 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3113 size, area->vm_page_prot)) 3114 return -EAGAIN; 3115 atomic_inc(&substream->runtime->mmap_count); 3116 return 0; 3117 } 3118 #endif /* SNDRV_PCM_INFO_MMAP */ 3119 3120 /* 3121 * mmap DMA buffer 3122 */ 3123 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, 3124 struct vm_area_struct *area) 3125 { 3126 snd_pcm_runtime_t *runtime; 3127 long size; 3128 unsigned long offset; 3129 size_t dma_bytes; 3130 3131 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3132 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3133 return -EINVAL; 3134 } else { 3135 if (!(area->vm_flags & VM_READ)) 3136 return -EINVAL; 3137 } 3138 runtime = substream->runtime; 3139 snd_assert(runtime != NULL, return -EAGAIN); 3140 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3141 return -EBADFD; 3142 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3143 return -ENXIO; 3144 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3145 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3146 return -EINVAL; 3147 size = area->vm_end - area->vm_start; 3148 offset = area->vm_pgoff << PAGE_SHIFT; 3149 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3150 if ((size_t)size > dma_bytes) 3151 return -EINVAL; 3152 if (offset > dma_bytes - size) 3153 return -EINVAL; 3154 3155 if (substream->ops->mmap) 3156 return substream->ops->mmap(substream, area); 3157 else 3158 return snd_pcm_default_mmap(substream, area); 3159 } 3160 3161 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3162 { 3163 snd_pcm_file_t * pcm_file; 3164 snd_pcm_substream_t *substream; 3165 unsigned long offset; 3166 3167 pcm_file = file->private_data; 3168 substream = pcm_file->substream; 3169 snd_assert(substream != NULL, return -ENXIO); 3170 3171 offset = area->vm_pgoff << PAGE_SHIFT; 3172 switch (offset) { 3173 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3174 if (substream->no_mmap_ctrl) 3175 return -ENXIO; 3176 return snd_pcm_mmap_status(substream, file, area); 3177 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3178 if (substream->no_mmap_ctrl) 3179 return -ENXIO; 3180 return snd_pcm_mmap_control(substream, file, area); 3181 default: 3182 return snd_pcm_mmap_data(substream, file, area); 3183 } 3184 return 0; 3185 } 3186 3187 static int snd_pcm_fasync(int fd, struct file * file, int on) 3188 { 3189 snd_pcm_file_t * pcm_file; 3190 snd_pcm_substream_t *substream; 3191 snd_pcm_runtime_t *runtime; 3192 int err; 3193 3194 pcm_file = file->private_data; 3195 substream = pcm_file->substream; 3196 snd_assert(substream != NULL, return -ENXIO); 3197 runtime = substream->runtime; 3198 3199 err = fasync_helper(fd, file, on, &runtime->fasync); 3200 if (err < 0) 3201 return err; 3202 return 0; 3203 } 3204 3205 /* 3206 * ioctl32 compat 3207 */ 3208 #ifdef CONFIG_COMPAT 3209 #include "pcm_compat.c" 3210 #else 3211 #define snd_pcm_ioctl_compat NULL 3212 #endif 3213 3214 /* 3215 * To be removed helpers to keep binary compatibility 3216 */ 3217 3218 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3219 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3220 3221 static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams) 3222 { 3223 unsigned int i; 3224 3225 memset(params, 0, sizeof(*params)); 3226 params->flags = oparams->flags; 3227 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3228 params->masks[i].bits[0] = oparams->masks[i]; 3229 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3230 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3231 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3232 params->info = oparams->info; 3233 params->msbits = oparams->msbits; 3234 params->rate_num = oparams->rate_num; 3235 params->rate_den = oparams->rate_den; 3236 params->fifo_size = oparams->fifo_size; 3237 } 3238 3239 static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params) 3240 { 3241 unsigned int i; 3242 3243 memset(oparams, 0, sizeof(*oparams)); 3244 oparams->flags = params->flags; 3245 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3246 oparams->masks[i] = params->masks[i].bits[0]; 3247 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3248 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3249 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3250 oparams->info = params->info; 3251 oparams->msbits = params->msbits; 3252 oparams->rate_num = params->rate_num; 3253 oparams->rate_den = params->rate_den; 3254 oparams->fifo_size = params->fifo_size; 3255 } 3256 3257 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) 3258 { 3259 snd_pcm_hw_params_t *params; 3260 struct sndrv_pcm_hw_params_old *oparams = NULL; 3261 int err; 3262 3263 params = kmalloc(sizeof(*params), GFP_KERNEL); 3264 if (!params) { 3265 err = -ENOMEM; 3266 goto out; 3267 } 3268 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3269 if (!oparams) { 3270 err = -ENOMEM; 3271 goto out; 3272 } 3273 3274 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3275 err = -EFAULT; 3276 goto out; 3277 } 3278 snd_pcm_hw_convert_from_old_params(params, oparams); 3279 err = snd_pcm_hw_refine(substream, params); 3280 snd_pcm_hw_convert_to_old_params(oparams, params); 3281 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3282 if (!err) 3283 err = -EFAULT; 3284 } 3285 out: 3286 kfree(params); 3287 kfree(oparams); 3288 return err; 3289 } 3290 3291 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams) 3292 { 3293 snd_pcm_hw_params_t *params; 3294 struct sndrv_pcm_hw_params_old *oparams = NULL; 3295 int err; 3296 3297 params = kmalloc(sizeof(*params), GFP_KERNEL); 3298 if (!params) { 3299 err = -ENOMEM; 3300 goto out; 3301 } 3302 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3303 if (!oparams) { 3304 err = -ENOMEM; 3305 goto out; 3306 } 3307 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3308 err = -EFAULT; 3309 goto out; 3310 } 3311 snd_pcm_hw_convert_from_old_params(params, oparams); 3312 err = snd_pcm_hw_params(substream, params); 3313 snd_pcm_hw_convert_to_old_params(oparams, params); 3314 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3315 if (!err) 3316 err = -EFAULT; 3317 } 3318 out: 3319 kfree(params); 3320 kfree(oparams); 3321 return err; 3322 } 3323 3324 /* 3325 * Register section 3326 */ 3327 3328 static struct file_operations snd_pcm_f_ops_playback = { 3329 .owner = THIS_MODULE, 3330 .write = snd_pcm_write, 3331 .writev = snd_pcm_writev, 3332 .open = snd_pcm_open, 3333 .release = snd_pcm_release, 3334 .poll = snd_pcm_playback_poll, 3335 .unlocked_ioctl = snd_pcm_playback_ioctl, 3336 .compat_ioctl = snd_pcm_ioctl_compat, 3337 .mmap = snd_pcm_mmap, 3338 .fasync = snd_pcm_fasync, 3339 }; 3340 3341 static struct file_operations snd_pcm_f_ops_capture = { 3342 .owner = THIS_MODULE, 3343 .read = snd_pcm_read, 3344 .readv = snd_pcm_readv, 3345 .open = snd_pcm_open, 3346 .release = snd_pcm_release, 3347 .poll = snd_pcm_capture_poll, 3348 .unlocked_ioctl = snd_pcm_capture_ioctl, 3349 .compat_ioctl = snd_pcm_ioctl_compat, 3350 .mmap = snd_pcm_mmap, 3351 .fasync = snd_pcm_fasync, 3352 }; 3353 3354 snd_minor_t snd_pcm_reg[2] = 3355 { 3356 { 3357 .comment = "digital audio playback", 3358 .f_ops = &snd_pcm_f_ops_playback, 3359 }, 3360 { 3361 .comment = "digital audio capture", 3362 .f_ops = &snd_pcm_f_ops_capture, 3363 } 3364 }; 3365