sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos.h>
  28 #include <linux/aio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  39 #include <dma-coherence.h>
  40 #endif
  41
  42 /*
  43  *  Compatibility
  44  */
  45
  46 struct snd_pcm_hw_params_old {
  47         unsigned int flags;
  48         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  49                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  50         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  51                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  52         unsigned int rmask;
  53         unsigned int cmask;
  54         unsigned int info;
  55         unsigned int msbits;
  56         unsigned int rate_num;
  57         unsigned int rate_den;
  58         snd_pcm_uframes_t fifo_size;
  59         unsigned char reserved[64];
  60 };
  61
  62 #ifdef CONFIG_SND_SUPPORT_OLD_API
  63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  65
  66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  67                                       struct snd_pcm_hw_params_old __user * _oparams);
  68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  69                                       struct snd_pcm_hw_params_old __user * _oparams);
  70 #endif
  71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  72
  73 /*
  74  *
  75  */
  76
  77 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
  78 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  79
  80 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
  81 {
  82         if (substream->pcm->nonatomic) {
  83                 down_read(&snd_pcm_link_rwsem);
  84                 mutex_lock(&substream->self_group.mutex);
  85         } else {
  86                 read_lock(&snd_pcm_link_rwlock);
  87                 spin_lock(&substream->self_group.lock);
  88         }
  89 }
  90 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
  91
  92 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
  93 {
  94         if (substream->pcm->nonatomic) {
  95                 mutex_unlock(&substream->self_group.mutex);
  96                 up_read(&snd_pcm_link_rwsem);
  97         } else {
  98                 spin_unlock(&substream->self_group.lock);
  99                 read_unlock(&snd_pcm_link_rwlock);
 100         }
 101 }
 102 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
 103
 104 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
 105 {
 106         if (!substream->pcm->nonatomic)
 107                 local_irq_disable();
 108         snd_pcm_stream_lock(substream);
 109 }
 110 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
 111
 112 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
 113 {
 114         snd_pcm_stream_unlock(substream);
 115         if (!substream->pcm->nonatomic)
 116                 local_irq_enable();
 117 }
 118 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
 119
 120 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
 121 {
 122         unsigned long flags = 0;
 123         if (!substream->pcm->nonatomic)
 124                 local_irq_save(flags);
 125         snd_pcm_stream_lock(substream);
 126         return flags;
 127 }
 128 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
 129
 130 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
 131                                       unsigned long flags)
 132 {
 133         snd_pcm_stream_unlock(substream);
 134         if (!substream->pcm->nonatomic)
 135                 local_irq_restore(flags);
 136 }
 137 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
 138
 139 static inline mm_segment_t snd_enter_user(void)
 140 {
 141         mm_segment_t fs = get_fs();
 142         set_fs(get_ds());
 143         return fs;
 144 }
 145
 146 static inline void snd_leave_user(mm_segment_t fs)
 147 {
 148         set_fs(fs);
 149 }
 150
 151
 152
 153 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 154 {
 155         struct snd_pcm_runtime *runtime;
 156         struct snd_pcm *pcm = substream->pcm;
 157         struct snd_pcm_str *pstr = substream->pstr;
 158
 159         memset(info, 0, sizeof(*info));
 160         info->card = pcm->card->number;
 161         info->device = pcm->device;
 162         info->stream = substream->stream;
 163         info->subdevice = substream->number;
 164         strlcpy(info->id, pcm->id, sizeof(info->id));
 165         strlcpy(info->name, pcm->name, sizeof(info->name));
 166         info->dev_class = pcm->dev_class;
 167         info->dev_subclass = pcm->dev_subclass;
 168         info->subdevices_count = pstr->substream_count;
 169         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 170         strlcpy(info->subname, substream->name, sizeof(info->subname));
 171         runtime = substream->runtime;
 172         /* AB: FIXME!!! This is definitely nonsense */
 173         if (runtime) {
 174                 info->sync = runtime->sync;
 175                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 176         }
 177         return 0;
 178 }
 179
 180 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 181                       struct snd_pcm_info __user * _info)
 182 {
 183         struct snd_pcm_info *info;
 184         int err;
 185
 186         info = kmalloc(sizeof(*info), GFP_KERNEL);
 187         if (! info)
 188                 return -ENOMEM;
 189         err = snd_pcm_info(substream, info);
 190         if (err >= 0) {
 191                 if (copy_to_user(_info, info, sizeof(*info)))
 192                         err = -EFAULT;
 193         }
 194         kfree(info);
 195         return err;
 196 }
 197
 198 #undef RULES_DEBUG
 199
 200 #ifdef RULES_DEBUG
 201 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 202 static const char * const snd_pcm_hw_param_names[] = {
 203         HW_PARAM(ACCESS),
 204         HW_PARAM(FORMAT),
 205         HW_PARAM(SUBFORMAT),
 206         HW_PARAM(SAMPLE_BITS),
 207         HW_PARAM(FRAME_BITS),
 208         HW_PARAM(CHANNELS),
 209         HW_PARAM(RATE),
 210         HW_PARAM(PERIOD_TIME),
 211         HW_PARAM(PERIOD_SIZE),
 212         HW_PARAM(PERIOD_BYTES),
 213         HW_PARAM(PERIODS),
 214         HW_PARAM(BUFFER_TIME),
 215         HW_PARAM(BUFFER_SIZE),
 216         HW_PARAM(BUFFER_BYTES),
 217         HW_PARAM(TICK_TIME),
 218 };
 219 #endif
 220
 221 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 222                       struct snd_pcm_hw_params *params)
 223 {
 224         unsigned int k;
 225         struct snd_pcm_hardware *hw;
 226         struct snd_interval *i = NULL;
 227         struct snd_mask *m = NULL;
 228         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 229         unsigned int rstamps[constrs->rules_num];
 230         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 231         unsigned int stamp = 2;
 232         int changed, again;
 233
 234         params->info = 0;
 235         params->fifo_size = 0;
 236         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 237                 params->msbits = 0;
 238         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 239                 params->rate_num = 0;
 240                 params->rate_den = 0;
 241         }
 242
 243         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 244                 m = hw_param_mask(params, k);
 245                 if (snd_mask_empty(m))
 246                         return -EINVAL;
 247                 if (!(params->rmask & (1 << k)))
 248                         continue;
 249 #ifdef RULES_DEBUG
 250                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 251                 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 252 #endif
 253                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 254 #ifdef RULES_DEBUG
 255                 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 256 #endif
 257                 if (changed)
 258                         params->cmask |= 1 << k;
 259                 if (changed < 0)
 260                         return changed;
 261         }
 262
 263         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 264                 i = hw_param_interval(params, k);
 265                 if (snd_interval_empty(i))
 266                         return -EINVAL;
 267                 if (!(params->rmask & (1 << k)))
 268                         continue;
 269 #ifdef RULES_DEBUG
 270                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 271                 if (i->empty)
 272                         pr_cont("empty");
 273                 else
 274                         pr_cont("%c%u %u%c",
 275                                i->openmin ? '(' : '[', i->min,
 276                                i->max, i->openmax ? ')' : ']');
 277                 pr_cont(" -> ");
 278 #endif
 279                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 280 #ifdef RULES_DEBUG
 281                 if (i->empty)
 282                         pr_cont("empty\n");
 283                 else
 284                         pr_cont("%c%u %u%c\n",
 285                                i->openmin ? '(' : '[', i->min,
 286                                i->max, i->openmax ? ')' : ']');
 287 #endif
 288                 if (changed)
 289                         params->cmask |= 1 << k;
 290                 if (changed < 0)
 291                         return changed;
 292         }
 293
 294         for (k = 0; k < constrs->rules_num; k++)
 295                 rstamps[k] = 0;
 296         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 297                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 298         do {
 299                 again = 0;
 300                 for (k = 0; k < constrs->rules_num; k++) {
 301                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 302                         unsigned int d;
 303                         int doit = 0;
 304                         if (r->cond && !(r->cond & params->flags))
 305                                 continue;
 306                         for (d = 0; r->deps[d] >= 0; d++) {
 307                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 308                                         doit = 1;
 309                                         break;
 310                                 }
 311                         }
 312                         if (!doit)
 313                                 continue;
 314 #ifdef RULES_DEBUG
 315                         pr_debug("Rule %d [%p]: ", k, r->func);
 316                         if (r->var >= 0) {
 317                                 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
 318                                 if (hw_is_mask(r->var)) {
 319                                         m = hw_param_mask(params, r->var);
 320                                         pr_cont("%x", *m->bits);
 321                                 } else {
 322                                         i = hw_param_interval(params, r->var);
 323                                         if (i->empty)
 324                                                 pr_cont("empty");
 325                                         else
 326                                                 pr_cont("%c%u %u%c",
 327                                                        i->openmin ? '(' : '[', i->min,
 328                                                        i->max, i->openmax ? ')' : ']');
 329                                 }
 330                         }
 331 #endif
 332                         changed = r->func(params, r);
 333 #ifdef RULES_DEBUG
 334                         if (r->var >= 0) {
 335                                 pr_cont(" -> ");
 336                                 if (hw_is_mask(r->var))
 337                                         pr_cont("%x", *m->bits);
 338                                 else {
 339                                         if (i->empty)
 340                                                 pr_cont("empty");
 341                                         else
 342                                                 pr_cont("%c%u %u%c",
 343                                                        i->openmin ? '(' : '[', i->min,
 344                                                        i->max, i->openmax ? ')' : ']');
 345                                 }
 346                         }
 347                         pr_cont("\n");
 348 #endif
 349                         rstamps[k] = stamp;
 350                         if (changed && r->var >= 0) {
 351                                 params->cmask |= (1 << r->var);
 352                                 vstamps[r->var] = stamp;
 353                                 again = 1;
 354                         }
 355                         if (changed < 0)
 356                                 return changed;
 357                         stamp++;
 358                 }
 359         } while (again);
 360         if (!params->msbits) {
 361                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 362                 if (snd_interval_single(i))
 363                         params->msbits = snd_interval_value(i);
 364         }
 365
 366         if (!params->rate_den) {
 367                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 368                 if (snd_interval_single(i)) {
 369                         params->rate_num = snd_interval_value(i);
 370                         params->rate_den = 1;
 371                 }
 372         }
 373
 374         hw = &substream->runtime->hw;
 375         if (!params->info)
 376                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 377         if (!params->fifo_size) {
 378                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 379                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 380                 if (snd_mask_min(m) == snd_mask_max(m) &&
 381                     snd_interval_min(i) == snd_interval_max(i)) {
 382                         changed = substream->ops->ioctl(substream,
 383                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 384                         if (changed < 0)
 385                                 return changed;
 386                 }
 387         }
 388         params->rmask = 0;
 389         return 0;
 390 }
 391
 392 EXPORT_SYMBOL(snd_pcm_hw_refine);
 393
 394 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 395                                   struct snd_pcm_hw_params __user * _params)
 396 {
 397         struct snd_pcm_hw_params *params;
 398         int err;
 399
 400         params = memdup_user(_params, sizeof(*params));
 401         if (IS_ERR(params))
 402                 return PTR_ERR(params);
 403
 404         err = snd_pcm_hw_refine(substream, params);
 405         if (copy_to_user(_params, params, sizeof(*params))) {
 406                 if (!err)
 407                         err = -EFAULT;
 408         }
 409
 410         kfree(params);
 411         return err;
 412 }
 413
 414 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 415 {
 416         int usecs;
 417
 418         if (! runtime->rate)
 419                 return -1; /* invalid */
 420
 421         /* take 75% of period time as the deadline */
 422         usecs = (750000 / runtime->rate) * runtime->period_size;
 423         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 424                 runtime->rate;
 425
 426         return usecs;
 427 }
 428
 429 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 430 {
 431         snd_pcm_stream_lock_irq(substream);
 432         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 433                 substream->runtime->status->state = state;
 434         snd_pcm_stream_unlock_irq(substream);
 435 }
 436
 437 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 438                              struct snd_pcm_hw_params *params)
 439 {
 440         struct snd_pcm_runtime *runtime;
 441         int err, usecs;
 442         unsigned int bits;
 443         snd_pcm_uframes_t frames;
 444
 445         if (PCM_RUNTIME_CHECK(substream))
 446                 return -ENXIO;
 447         runtime = substream->runtime;
 448         snd_pcm_stream_lock_irq(substream);
 449         switch (runtime->status->state) {
 450         case SNDRV_PCM_STATE_OPEN:
 451         case SNDRV_PCM_STATE_SETUP:
 452         case SNDRV_PCM_STATE_PREPARED:
 453                 break;
 454         default:
 455                 snd_pcm_stream_unlock_irq(substream);
 456                 return -EBADFD;
 457         }
 458         snd_pcm_stream_unlock_irq(substream);
 459 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
 460         if (!substream->oss.oss)
 461 #endif
 462                 if (atomic_read(&substream->mmap_count))
 463                         return -EBADFD;
 464
 465         params->rmask = ~0U;
 466         err = snd_pcm_hw_refine(substream, params);
 467         if (err < 0)
 468                 goto _error;
 469
 470         err = snd_pcm_hw_params_choose(substream, params);
 471         if (err < 0)
 472                 goto _error;
 473
 474         if (substream->ops->hw_params != NULL) {
 475                 err = substream->ops->hw_params(substream, params);
 476                 if (err < 0)
 477                         goto _error;
 478         }
 479
 480         runtime->access = params_access(params);
 481         runtime->format = params_format(params);
 482         runtime->subformat = params_subformat(params);
 483         runtime->channels = params_channels(params);
 484         runtime->rate = params_rate(params);
 485         runtime->period_size = params_period_size(params);
 486         runtime->periods = params_periods(params);
 487         runtime->buffer_size = params_buffer_size(params);
 488         runtime->info = params->info;
 489         runtime->rate_num = params->rate_num;
 490         runtime->rate_den = params->rate_den;
 491         runtime->no_period_wakeup =
 492                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 493                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 494
 495         bits = snd_pcm_format_physical_width(runtime->format);
 496         runtime->sample_bits = bits;
 497         bits *= runtime->channels;
 498         runtime->frame_bits = bits;
 499         frames = 1;
 500         while (bits % 8 != 0) {
 501                 bits *= 2;
 502                 frames *= 2;
 503         }
 504         runtime->byte_align = bits / 8;
 505         runtime->min_align = frames;
 506
 507         /* Default sw params */
 508         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 509         runtime->period_step = 1;
 510         runtime->control->avail_min = runtime->period_size;
 511         runtime->start_threshold = 1;
 512         runtime->stop_threshold = runtime->buffer_size;
 513         runtime->silence_threshold = 0;
 514         runtime->silence_size = 0;
 515         runtime->boundary = runtime->buffer_size;
 516         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 517                 runtime->boundary *= 2;
 518
 519         snd_pcm_timer_resolution_change(substream);
 520         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 521
 522         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 523                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 524         if ((usecs = period_to_usecs(runtime)) >= 0)
 525                 pm_qos_add_request(&substream->latency_pm_qos_req,
 526                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 527         return 0;
 528  _error:
 529         /* hardware might be unusable from this time,
 530            so we force application to retry to set
 531            the correct hardware parameter settings */
 532         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 533         if (substream->ops->hw_free != NULL)
 534                 substream->ops->hw_free(substream);
 535         return err;
 536 }
 537
 538 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 539                                   struct snd_pcm_hw_params __user * _params)
 540 {
 541         struct snd_pcm_hw_params *params;
 542         int err;
 543
 544         params = memdup_user(_params, sizeof(*params));
 545         if (IS_ERR(params))
 546                 return PTR_ERR(params);
 547
 548         err = snd_pcm_hw_params(substream, params);
 549         if (copy_to_user(_params, params, sizeof(*params))) {
 550                 if (!err)
 551                         err = -EFAULT;
 552         }
 553
 554         kfree(params);
 555         return err;
 556 }
 557
 558 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 559 {
 560         struct snd_pcm_runtime *runtime;
 561         int result = 0;
 562
 563         if (PCM_RUNTIME_CHECK(substream))
 564                 return -ENXIO;
 565         runtime = substream->runtime;
 566         snd_pcm_stream_lock_irq(substream);
 567         switch (runtime->status->state) {
 568         case SNDRV_PCM_STATE_SETUP:
 569         case SNDRV_PCM_STATE_PREPARED:
 570                 break;
 571         default:
 572                 snd_pcm_stream_unlock_irq(substream);
 573                 return -EBADFD;
 574         }
 575         snd_pcm_stream_unlock_irq(substream);
 576         if (atomic_read(&substream->mmap_count))
 577                 return -EBADFD;
 578         if (substream->ops->hw_free)
 579                 result = substream->ops->hw_free(substream);
 580         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 581         pm_qos_remove_request(&substream->latency_pm_qos_req);
 582         return result;
 583 }
 584
 585 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 586                              struct snd_pcm_sw_params *params)
 587 {
 588         struct snd_pcm_runtime *runtime;
 589         int err;
 590
 591         if (PCM_RUNTIME_CHECK(substream))
 592                 return -ENXIO;
 593         runtime = substream->runtime;
 594         snd_pcm_stream_lock_irq(substream);
 595         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 596                 snd_pcm_stream_unlock_irq(substream);
 597                 return -EBADFD;
 598         }
 599         snd_pcm_stream_unlock_irq(substream);
 600
 601         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 602                 return -EINVAL;
 603         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 604             params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
 605                 return -EINVAL;
 606         if (params->avail_min == 0)
 607                 return -EINVAL;
 608         if (params->silence_size >= runtime->boundary) {
 609                 if (params->silence_threshold != 0)
 610                         return -EINVAL;
 611         } else {
 612                 if (params->silence_size > params->silence_threshold)
 613                         return -EINVAL;
 614                 if (params->silence_threshold > runtime->buffer_size)
 615                         return -EINVAL;
 616         }
 617         err = 0;
 618         snd_pcm_stream_lock_irq(substream);
 619         runtime->tstamp_mode = params->tstamp_mode;
 620         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
 621                 runtime->tstamp_type = params->tstamp_type;
 622         runtime->period_step = params->period_step;
 623         runtime->control->avail_min = params->avail_min;
 624         runtime->start_threshold = params->start_threshold;
 625         runtime->stop_threshold = params->stop_threshold;
 626         runtime->silence_threshold = params->silence_threshold;
 627         runtime->silence_size = params->silence_size;
 628         params->boundary = runtime->boundary;
 629         if (snd_pcm_running(substream)) {
 630                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 631                     runtime->silence_size > 0)
 632                         snd_pcm_playback_silence(substream, ULONG_MAX);
 633                 err = snd_pcm_update_state(substream, runtime);
 634         }
 635         snd_pcm_stream_unlock_irq(substream);
 636         return err;
 637 }
 638
 639 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 640                                   struct snd_pcm_sw_params __user * _params)
 641 {
 642         struct snd_pcm_sw_params params;
 643         int err;
 644         if (copy_from_user(&params, _params, sizeof(params)))
 645                 return -EFAULT;
 646         err = snd_pcm_sw_params(substream, &params);
 647         if (copy_to_user(_params, &params, sizeof(params)))
 648                 return -EFAULT;
 649         return err;
 650 }
 651
 652 int snd_pcm_status(struct snd_pcm_substream *substream,
 653                    struct snd_pcm_status *status)
 654 {
 655         struct snd_pcm_runtime *runtime = substream->runtime;
 656
 657         snd_pcm_stream_lock_irq(substream);
 658         status->state = runtime->status->state;
 659         status->suspended_state = runtime->status->suspended_state;
 660         if (status->state == SNDRV_PCM_STATE_OPEN)
 661                 goto _end;
 662         status->trigger_tstamp = runtime->trigger_tstamp;
 663         if (snd_pcm_running(substream)) {
 664                 snd_pcm_update_hw_ptr(substream);
 665                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 666                         status->tstamp = runtime->status->tstamp;
 667                         status->audio_tstamp =
 668                                 runtime->status->audio_tstamp;
 669                         goto _tstamp_end;
 670                 }
 671         }
 672         snd_pcm_gettime(runtime, &status->tstamp);
 673  _tstamp_end:
 674         status->appl_ptr = runtime->control->appl_ptr;
 675         status->hw_ptr = runtime->status->hw_ptr;
 676         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 677                 status->avail = snd_pcm_playback_avail(runtime);
 678                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 679                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 680                         status->delay = runtime->buffer_size - status->avail;
 681                         status->delay += runtime->delay;
 682                 } else
 683                         status->delay = 0;
 684         } else {
 685                 status->avail = snd_pcm_capture_avail(runtime);
 686                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 687                         status->delay = status->avail + runtime->delay;
 688                 else
 689                         status->delay = 0;
 690         }
 691         status->avail_max = runtime->avail_max;
 692         status->overrange = runtime->overrange;
 693         runtime->avail_max = 0;
 694         runtime->overrange = 0;
 695  _end:
 696         snd_pcm_stream_unlock_irq(substream);
 697         return 0;
 698 }
 699
 700 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 701                                struct snd_pcm_status __user * _status)
 702 {
 703         struct snd_pcm_status status;
 704         int res;
 705
 706         memset(&status, 0, sizeof(status));
 707         res = snd_pcm_status(substream, &status);
 708         if (res < 0)
 709                 return res;
 710         if (copy_to_user(_status, &status, sizeof(status)))
 711                 return -EFAULT;
 712         return 0;
 713 }
 714
 715 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 716                                 struct snd_pcm_channel_info * info)
 717 {
 718         struct snd_pcm_runtime *runtime;
 719         unsigned int channel;
 720
 721         channel = info->channel;
 722         runtime = substream->runtime;
 723         snd_pcm_stream_lock_irq(substream);
 724         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 725                 snd_pcm_stream_unlock_irq(substream);
 726                 return -EBADFD;
 727         }
 728         snd_pcm_stream_unlock_irq(substream);
 729         if (channel >= runtime->channels)
 730                 return -EINVAL;
 731         memset(info, 0, sizeof(*info));
 732         info->channel = channel;
 733         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 734 }
 735
 736 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 737                                      struct snd_pcm_channel_info __user * _info)
 738 {
 739         struct snd_pcm_channel_info info;
 740         int res;
 741
 742         if (copy_from_user(&info, _info, sizeof(info)))
 743                 return -EFAULT;
 744         res = snd_pcm_channel_info(substream, &info);
 745         if (res < 0)
 746                 return res;
 747         if (copy_to_user(_info, &info, sizeof(info)))
 748                 return -EFAULT;
 749         return 0;
 750 }
 751
 752 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 753 {
 754         struct snd_pcm_runtime *runtime = substream->runtime;
 755         if (runtime->trigger_master == NULL)
 756                 return;
 757         if (runtime->trigger_master == substream) {
 758                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 759         } else {
 760                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 761                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 762         }
 763         runtime->trigger_master = NULL;
 764 }
 765
 766 struct action_ops {
 767         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 768         int (*do_action)(struct snd_pcm_substream *substream, int state);
 769         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 770         void (*post_action)(struct snd_pcm_substream *substream, int state);
 771 };
 772
 773 /*
 774  *  this functions is core for handling of linked stream
 775  *  Note: the stream state might be changed also on failure
 776  *  Note2: call with calling stream lock + link lock
 777  */
 778 static int snd_pcm_action_group(struct action_ops *ops,
 779                                 struct snd_pcm_substream *substream,
 780                                 int state, int do_lock)
 781 {
 782         struct snd_pcm_substream *s = NULL;
 783         struct snd_pcm_substream *s1;
 784         int res = 0, depth = 1;
 785
 786         snd_pcm_group_for_each_entry(s, substream) {
 787                 if (do_lock && s != substream) {
 788                         if (s->pcm->nonatomic)
 789                                 mutex_lock_nested(&s->self_group.mutex, depth);
 790                         else
 791                                 spin_lock_nested(&s->self_group.lock, depth);
 792                         depth++;
 793                 }
 794                 res = ops->pre_action(s, state);
 795                 if (res < 0)
 796                         goto _unlock;
 797         }
 798         snd_pcm_group_for_each_entry(s, substream) {
 799                 res = ops->do_action(s, state);
 800                 if (res < 0) {
 801                         if (ops->undo_action) {
 802                                 snd_pcm_group_for_each_entry(s1, substream) {
 803                                         if (s1 == s) /* failed stream */
 804                                                 break;
 805                                         ops->undo_action(s1, state);
 806                                 }
 807                         }
 808                         s = NULL; /* unlock all */
 809                         goto _unlock;
 810                 }
 811         }
 812         snd_pcm_group_for_each_entry(s, substream) {
 813                 ops->post_action(s, state);
 814         }
 815  _unlock:
 816         if (do_lock) {
 817                 /* unlock streams */
 818                 snd_pcm_group_for_each_entry(s1, substream) {
 819                         if (s1 != substream) {
 820                                 if (s1->pcm->nonatomic)
 821                                         mutex_unlock(&s1->self_group.mutex);
 822                                 else
 823                                         spin_unlock(&s1->self_group.lock);
 824                         }
 825                         if (s1 == s)    /* end */
 826                                 break;
 827                 }
 828         }
 829         return res;
 830 }
 831
 832 /*
 833  *  Note: call with stream lock
 834  */
 835 static int snd_pcm_action_single(struct action_ops *ops,
 836                                  struct snd_pcm_substream *substream,
 837                                  int state)
 838 {
 839         int res;
 840
 841         res = ops->pre_action(substream, state);
 842         if (res < 0)
 843                 return res;
 844         res = ops->do_action(substream, state);
 845         if (res == 0)
 846                 ops->post_action(substream, state);
 847         else if (ops->undo_action)
 848                 ops->undo_action(substream, state);
 849         return res;
 850 }
 851
 852 /* call in mutex-protected context */
 853 static int snd_pcm_action_mutex(struct action_ops *ops,
 854                                 struct snd_pcm_substream *substream,
 855                                 int state)
 856 {
 857         int res;
 858
 859         if (snd_pcm_stream_linked(substream)) {
 860                 if (!mutex_trylock(&substream->group->mutex)) {
 861                         mutex_unlock(&substream->self_group.mutex);
 862                         mutex_lock(&substream->group->mutex);
 863                         mutex_lock(&substream->self_group.mutex);
 864                 }
 865                 res = snd_pcm_action_group(ops, substream, state, 1);
 866                 mutex_unlock(&substream->group->mutex);
 867         } else {
 868                 res = snd_pcm_action_single(ops, substream, state);
 869         }
 870         return res;
 871 }
 872
 873 /*
 874  *  Note: call with stream lock
 875  */
 876 static int snd_pcm_action(struct action_ops *ops,
 877                           struct snd_pcm_substream *substream,
 878                           int state)
 879 {
 880         int res;
 881
 882         if (substream->pcm->nonatomic)
 883                 return snd_pcm_action_mutex(ops, substream, state);
 884
 885         if (snd_pcm_stream_linked(substream)) {
 886                 if (!spin_trylock(&substream->group->lock)) {
 887                         spin_unlock(&substream->self_group.lock);
 888                         spin_lock(&substream->group->lock);
 889                         spin_lock(&substream->self_group.lock);
 890                 }
 891                 res = snd_pcm_action_group(ops, substream, state, 1);
 892                 spin_unlock(&substream->group->lock);
 893         } else {
 894                 res = snd_pcm_action_single(ops, substream, state);
 895         }
 896         return res;
 897 }
 898
 899 static int snd_pcm_action_lock_mutex(struct action_ops *ops,
 900                                      struct snd_pcm_substream *substream,
 901                                      int state)
 902 {
 903         int res;
 904
 905         down_read(&snd_pcm_link_rwsem);
 906         if (snd_pcm_stream_linked(substream)) {
 907                 mutex_lock(&substream->group->mutex);
 908                 mutex_lock(&substream->self_group.mutex);
 909                 res = snd_pcm_action_group(ops, substream, state, 1);
 910                 mutex_unlock(&substream->self_group.mutex);
 911                 mutex_unlock(&substream->group->mutex);
 912         } else {
 913                 mutex_lock(&substream->self_group.mutex);
 914                 res = snd_pcm_action_single(ops, substream, state);
 915                 mutex_unlock(&substream->self_group.mutex);
 916         }
 917         up_read(&snd_pcm_link_rwsem);
 918         return res;
 919 }
 920
 921 /*
 922  *  Note: don't use any locks before
 923  */
 924 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 925                                    struct snd_pcm_substream *substream,
 926                                    int state)
 927 {
 928         int res;
 929
 930         if (substream->pcm->nonatomic)
 931                 return snd_pcm_action_lock_mutex(ops, substream, state);
 932
 933         read_lock_irq(&snd_pcm_link_rwlock);
 934         if (snd_pcm_stream_linked(substream)) {
 935                 spin_lock(&substream->group->lock);
 936                 spin_lock(&substream->self_group.lock);
 937                 res = snd_pcm_action_group(ops, substream, state, 1);
 938                 spin_unlock(&substream->self_group.lock);
 939                 spin_unlock(&substream->group->lock);
 940         } else {
 941                 spin_lock(&substream->self_group.lock);
 942                 res = snd_pcm_action_single(ops, substream, state);
 943                 spin_unlock(&substream->self_group.lock);
 944         }
 945         read_unlock_irq(&snd_pcm_link_rwlock);
 946         return res;
 947 }
 948
 949 /*
 950  */
 951 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 952                                     struct snd_pcm_substream *substream,
 953                                     int state)
 954 {
 955         int res;
 956
 957         down_read(&snd_pcm_link_rwsem);
 958         if (snd_pcm_stream_linked(substream))
 959                 res = snd_pcm_action_group(ops, substream, state, 0);
 960         else
 961                 res = snd_pcm_action_single(ops, substream, state);
 962         up_read(&snd_pcm_link_rwsem);
 963         return res;
 964 }
 965
 966 /*
 967  * start callbacks
 968  */
 969 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 970 {
 971         struct snd_pcm_runtime *runtime = substream->runtime;
 972         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 973                 return -EBADFD;
 974         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 975             !snd_pcm_playback_data(substream))
 976                 return -EPIPE;
 977         runtime->trigger_master = substream;
 978         return 0;
 979 }
 980
 981 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 982 {
 983         if (substream->runtime->trigger_master != substream)
 984                 return 0;
 985         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 986 }
 987
 988 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 989 {
 990         if (substream->runtime->trigger_master == substream)
 991                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 992 }
 993
 994 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 995 {
 996         struct snd_pcm_runtime *runtime = substream->runtime;
 997         snd_pcm_trigger_tstamp(substream);
 998         runtime->hw_ptr_jiffies = jiffies;
 999         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1000                                                             runtime->rate;
1001         runtime->status->state = state;
1002         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1003             runtime->silence_size > 0)
1004                 snd_pcm_playback_silence(substream, ULONG_MAX);
1005         if (substream->timer)
1006                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1007                                  &runtime->trigger_tstamp);
1008 }
1009
1010 static struct action_ops snd_pcm_action_start = {
1011         .pre_action = snd_pcm_pre_start,
1012         .do_action = snd_pcm_do_start,
1013         .undo_action = snd_pcm_undo_start,
1014         .post_action = snd_pcm_post_start
1015 };
1016
1017 /**
1018  * snd_pcm_start - start all linked streams
1019  * @substream: the PCM substream instance
1020  *
1021  * Return: Zero if successful, or a negative error code.
1022  */
1023 int snd_pcm_start(struct snd_pcm_substream *substream)
1024 {
1025         return snd_pcm_action(&snd_pcm_action_start, substream,
1026                               SNDRV_PCM_STATE_RUNNING);
1027 }
1028
1029 /*
1030  * stop callbacks
1031  */
1032 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1033 {
1034         struct snd_pcm_runtime *runtime = substream->runtime;
1035         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1036                 return -EBADFD;
1037         runtime->trigger_master = substream;
1038         return 0;
1039 }
1040
1041 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1042 {
1043         if (substream->runtime->trigger_master == substream &&
1044             snd_pcm_running(substream))
1045                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1046         return 0; /* unconditonally stop all substreams */
1047 }
1048
1049 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1050 {
1051         struct snd_pcm_runtime *runtime = substream->runtime;
1052         if (runtime->status->state != state) {
1053                 snd_pcm_trigger_tstamp(substream);
1054                 if (substream->timer)
1055                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1056                                          &runtime->trigger_tstamp);
1057                 runtime->status->state = state;
1058         }
1059         wake_up(&runtime->sleep);
1060         wake_up(&runtime->tsleep);
1061 }
1062
1063 static struct action_ops snd_pcm_action_stop = {
1064         .pre_action = snd_pcm_pre_stop,
1065         .do_action = snd_pcm_do_stop,
1066         .post_action = snd_pcm_post_stop
1067 };
1068
1069 /**
1070  * snd_pcm_stop - try to stop all running streams in the substream group
1071  * @substream: the PCM substream instance
1072  * @state: PCM state after stopping the stream
1073  *
1074  * The state of each stream is then changed to the given state unconditionally.
1075  *
1076  * Return: Zero if successful, or a negative error code.
1077  */
1078 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1079 {
1080         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1081 }
1082
1083 EXPORT_SYMBOL(snd_pcm_stop);
1084
1085 /**
1086  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1087  * @substream: the PCM substream
1088  *
1089  * After stopping, the state is changed to SETUP.
1090  * Unlike snd_pcm_stop(), this affects only the given stream.
1091  *
1092  * Return: Zero if succesful, or a negative error code.
1093  */
1094 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1095 {
1096         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1097                                      SNDRV_PCM_STATE_SETUP);
1098 }
1099
1100 /*
1101  * pause callbacks
1102  */
1103 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1104 {
1105         struct snd_pcm_runtime *runtime = substream->runtime;
1106         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1107                 return -ENOSYS;
1108         if (push) {
1109                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1110                         return -EBADFD;
1111         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1112                 return -EBADFD;
1113         runtime->trigger_master = substream;
1114         return 0;
1115 }
1116
1117 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1118 {
1119         if (substream->runtime->trigger_master != substream)
1120                 return 0;
1121         /* some drivers might use hw_ptr to recover from the pause -
1122            update the hw_ptr now */
1123         if (push)
1124                 snd_pcm_update_hw_ptr(substream);
1125         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1126          * a delta between the current jiffies, this gives a large enough
1127          * delta, effectively to skip the check once.
1128          */
1129         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1130         return substream->ops->trigger(substream,
1131                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1132                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1133 }
1134
1135 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1136 {
1137         if (substream->runtime->trigger_master == substream)
1138                 substream->ops->trigger(substream,
1139                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1140                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1141 }
1142
1143 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1144 {
1145         struct snd_pcm_runtime *runtime = substream->runtime;
1146         snd_pcm_trigger_tstamp(substream);
1147         if (push) {
1148                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1149                 if (substream->timer)
1150                         snd_timer_notify(substream->timer,
1151                                          SNDRV_TIMER_EVENT_MPAUSE,
1152                                          &runtime->trigger_tstamp);
1153                 wake_up(&runtime->sleep);
1154                 wake_up(&runtime->tsleep);
1155         } else {
1156                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1157                 if (substream->timer)
1158                         snd_timer_notify(substream->timer,
1159                                          SNDRV_TIMER_EVENT_MCONTINUE,
1160                                          &runtime->trigger_tstamp);
1161         }
1162 }
1163
1164 static struct action_ops snd_pcm_action_pause = {
1165         .pre_action = snd_pcm_pre_pause,
1166         .do_action = snd_pcm_do_pause,
1167         .undo_action = snd_pcm_undo_pause,
1168         .post_action = snd_pcm_post_pause
1169 };
1170
1171 /*
1172  * Push/release the pause for all linked streams.
1173  */
1174 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1175 {
1176         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1177 }
1178
1179 #ifdef CONFIG_PM
1180 /* suspend */
1181
1182 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1183 {
1184         struct snd_pcm_runtime *runtime = substream->runtime;
1185         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1186                 return -EBUSY;
1187         runtime->trigger_master = substream;
1188         return 0;
1189 }
1190
1191 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1192 {
1193         struct snd_pcm_runtime *runtime = substream->runtime;
1194         if (runtime->trigger_master != substream)
1195                 return 0;
1196         if (! snd_pcm_running(substream))
1197                 return 0;
1198         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1199         return 0; /* suspend unconditionally */
1200 }
1201
1202 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1203 {
1204         struct snd_pcm_runtime *runtime = substream->runtime;
1205         snd_pcm_trigger_tstamp(substream);
1206         if (substream->timer)
1207                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1208                                  &runtime->trigger_tstamp);
1209         runtime->status->suspended_state = runtime->status->state;
1210         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1211         wake_up(&runtime->sleep);
1212         wake_up(&runtime->tsleep);
1213 }
1214
1215 static struct action_ops snd_pcm_action_suspend = {
1216         .pre_action = snd_pcm_pre_suspend,
1217         .do_action = snd_pcm_do_suspend,
1218         .post_action = snd_pcm_post_suspend
1219 };
1220
1221 /**
1222  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1223  * @substream: the PCM substream
1224  *
1225  * After this call, all streams are changed to SUSPENDED state.
1226  *
1227  * Return: Zero if successful (or @substream is %NULL), or a negative error
1228  * code.
1229  */
1230 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1231 {
1232         int err;
1233         unsigned long flags;
1234
1235         if (! substream)
1236                 return 0;
1237
1238         snd_pcm_stream_lock_irqsave(substream, flags);
1239         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1240         snd_pcm_stream_unlock_irqrestore(substream, flags);
1241         return err;
1242 }
1243
1244 EXPORT_SYMBOL(snd_pcm_suspend);
1245
1246 /**
1247  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1248  * @pcm: the PCM instance
1249  *
1250  * After this call, all streams are changed to SUSPENDED state.
1251  *
1252  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1253  */
1254 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1255 {
1256         struct snd_pcm_substream *substream;
1257         int stream, err = 0;
1258
1259         if (! pcm)
1260                 return 0;
1261
1262         for (stream = 0; stream < 2; stream++) {
1263                 for (substream = pcm->streams[stream].substream;
1264                      substream; substream = substream->next) {
1265                         /* FIXME: the open/close code should lock this as well */
1266                         if (substream->runtime == NULL)
1267                                 continue;
1268                         err = snd_pcm_suspend(substream);
1269                         if (err < 0 && err != -EBUSY)
1270                                 return err;
1271                 }
1272         }
1273         return 0;
1274 }
1275
1276 EXPORT_SYMBOL(snd_pcm_suspend_all);
1277
1278 /* resume */
1279
1280 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1281 {
1282         struct snd_pcm_runtime *runtime = substream->runtime;
1283         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1284                 return -ENOSYS;
1285         runtime->trigger_master = substream;
1286         return 0;
1287 }
1288
1289 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1290 {
1291         struct snd_pcm_runtime *runtime = substream->runtime;
1292         if (runtime->trigger_master != substream)
1293                 return 0;
1294         /* DMA not running previously? */
1295         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1296             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1297              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1298                 return 0;
1299         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1300 }
1301
1302 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1303 {
1304         if (substream->runtime->trigger_master == substream &&
1305             snd_pcm_running(substream))
1306                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1307 }
1308
1309 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         snd_pcm_trigger_tstamp(substream);
1313         if (substream->timer)
1314                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1315                                  &runtime->trigger_tstamp);
1316         runtime->status->state = runtime->status->suspended_state;
1317 }
1318
1319 static struct action_ops snd_pcm_action_resume = {
1320         .pre_action = snd_pcm_pre_resume,
1321         .do_action = snd_pcm_do_resume,
1322         .undo_action = snd_pcm_undo_resume,
1323         .post_action = snd_pcm_post_resume
1324 };
1325
1326 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1327 {
1328         struct snd_card *card = substream->pcm->card;
1329         int res;
1330
1331         snd_power_lock(card);
1332         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1333                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1334         snd_power_unlock(card);
1335         return res;
1336 }
1337
1338 #else
1339
1340 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1341 {
1342         return -ENOSYS;
1343 }
1344
1345 #endif /* CONFIG_PM */
1346
1347 /*
1348  * xrun ioctl
1349  *
1350  * Change the RUNNING stream(s) to XRUN state.
1351  */
1352 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1353 {
1354         struct snd_card *card = substream->pcm->card;
1355         struct snd_pcm_runtime *runtime = substream->runtime;
1356         int result;
1357
1358         snd_power_lock(card);
1359         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1360                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1361                 if (result < 0)
1362                         goto _unlock;
1363         }
1364
1365         snd_pcm_stream_lock_irq(substream);
1366         switch (runtime->status->state) {
1367         case SNDRV_PCM_STATE_XRUN:
1368                 result = 0;     /* already there */
1369                 break;
1370         case SNDRV_PCM_STATE_RUNNING:
1371                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1372                 break;
1373         default:
1374                 result = -EBADFD;
1375         }
1376         snd_pcm_stream_unlock_irq(substream);
1377  _unlock:
1378         snd_power_unlock(card);
1379         return result;
1380 }
1381
1382 /*
1383  * reset ioctl
1384  */
1385 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1386 {
1387         struct snd_pcm_runtime *runtime = substream->runtime;
1388         switch (runtime->status->state) {
1389         case SNDRV_PCM_STATE_RUNNING:
1390         case SNDRV_PCM_STATE_PREPARED:
1391         case SNDRV_PCM_STATE_PAUSED:
1392         case SNDRV_PCM_STATE_SUSPENDED:
1393                 return 0;
1394         default:
1395                 return -EBADFD;
1396         }
1397 }
1398
1399 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1400 {
1401         struct snd_pcm_runtime *runtime = substream->runtime;
1402         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1403         if (err < 0)
1404                 return err;
1405         runtime->hw_ptr_base = 0;
1406         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1407                 runtime->status->hw_ptr % runtime->period_size;
1408         runtime->silence_start = runtime->status->hw_ptr;
1409         runtime->silence_filled = 0;
1410         return 0;
1411 }
1412
1413 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1414 {
1415         struct snd_pcm_runtime *runtime = substream->runtime;
1416         runtime->control->appl_ptr = runtime->status->hw_ptr;
1417         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1418             runtime->silence_size > 0)
1419                 snd_pcm_playback_silence(substream, ULONG_MAX);
1420 }
1421
1422 static struct action_ops snd_pcm_action_reset = {
1423         .pre_action = snd_pcm_pre_reset,
1424         .do_action = snd_pcm_do_reset,
1425         .post_action = snd_pcm_post_reset
1426 };
1427
1428 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1429 {
1430         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1431 }
1432
1433 /*
1434  * prepare ioctl
1435  */
1436 /* we use the second argument for updating f_flags */
1437 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1438                                int f_flags)
1439 {
1440         struct snd_pcm_runtime *runtime = substream->runtime;
1441         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1442             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1443                 return -EBADFD;
1444         if (snd_pcm_running(substream))
1445                 return -EBUSY;
1446         substream->f_flags = f_flags;
1447         return 0;
1448 }
1449
1450 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1451 {
1452         int err;
1453         err = substream->ops->prepare(substream);
1454         if (err < 0)
1455                 return err;
1456         return snd_pcm_do_reset(substream, 0);
1457 }
1458
1459 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1460 {
1461         struct snd_pcm_runtime *runtime = substream->runtime;
1462         runtime->control->appl_ptr = runtime->status->hw_ptr;
1463         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1464 }
1465
1466 static struct action_ops snd_pcm_action_prepare = {
1467         .pre_action = snd_pcm_pre_prepare,
1468         .do_action = snd_pcm_do_prepare,
1469         .post_action = snd_pcm_post_prepare
1470 };
1471
1472 /**
1473  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1474  * @substream: the PCM substream instance
1475  * @file: file to refer f_flags
1476  *
1477  * Return: Zero if successful, or a negative error code.
1478  */
1479 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1480                            struct file *file)
1481 {
1482         int res;
1483         struct snd_card *card = substream->pcm->card;
1484         int f_flags;
1485
1486         if (file)
1487                 f_flags = file->f_flags;
1488         else
1489                 f_flags = substream->f_flags;
1490
1491         snd_power_lock(card);
1492         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1493                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1494                                                substream, f_flags);
1495         snd_power_unlock(card);
1496         return res;
1497 }
1498
1499 /*
1500  * drain ioctl
1501  */
1502
1503 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1504 {
1505         struct snd_pcm_runtime *runtime = substream->runtime;
1506         switch (runtime->status->state) {
1507         case SNDRV_PCM_STATE_OPEN:
1508         case SNDRV_PCM_STATE_DISCONNECTED:
1509         case SNDRV_PCM_STATE_SUSPENDED:
1510                 return -EBADFD;
1511         }
1512         runtime->trigger_master = substream;
1513         return 0;
1514 }
1515
1516 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1517 {
1518         struct snd_pcm_runtime *runtime = substream->runtime;
1519         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1520                 switch (runtime->status->state) {
1521                 case SNDRV_PCM_STATE_PREPARED:
1522                         /* start playback stream if possible */
1523                         if (! snd_pcm_playback_empty(substream)) {
1524                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1525                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1526                         }
1527                         break;
1528                 case SNDRV_PCM_STATE_RUNNING:
1529                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1530                         break;
1531                 case SNDRV_PCM_STATE_XRUN:
1532                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1533                         break;
1534                 default:
1535                         break;
1536                 }
1537         } else {
1538                 /* stop running stream */
1539                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1540                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1541                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1542                         snd_pcm_do_stop(substream, new_state);
1543                         snd_pcm_post_stop(substream, new_state);
1544                 }
1545         }
1546         return 0;
1547 }
1548
1549 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1550 {
1551 }
1552
1553 static struct action_ops snd_pcm_action_drain_init = {
1554         .pre_action = snd_pcm_pre_drain_init,
1555         .do_action = snd_pcm_do_drain_init,
1556         .post_action = snd_pcm_post_drain_init
1557 };
1558
1559 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1560
1561 /*
1562  * Drain the stream(s).
1563  * When the substream is linked, sync until the draining of all playback streams
1564  * is finished.
1565  * After this call, all streams are supposed to be either SETUP or DRAINING
1566  * (capture only) state.
1567  */
1568 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1569                          struct file *file)
1570 {
1571         struct snd_card *card;
1572         struct snd_pcm_runtime *runtime;
1573         struct snd_pcm_substream *s;
1574         wait_queue_t wait;
1575         int result = 0;
1576         int nonblock = 0;
1577
1578         card = substream->pcm->card;
1579         runtime = substream->runtime;
1580
1581         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1582                 return -EBADFD;
1583
1584         snd_power_lock(card);
1585         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1586                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1587                 if (result < 0) {
1588                         snd_power_unlock(card);
1589                         return result;
1590                 }
1591         }
1592
1593         if (file) {
1594                 if (file->f_flags & O_NONBLOCK)
1595                         nonblock = 1;
1596         } else if (substream->f_flags & O_NONBLOCK)
1597                 nonblock = 1;
1598
1599         down_read(&snd_pcm_link_rwsem);
1600         snd_pcm_stream_lock_irq(substream);
1601         /* resume pause */
1602         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1603                 snd_pcm_pause(substream, 0);
1604
1605         /* pre-start/stop - all running streams are changed to DRAINING state */
1606         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1607         if (result < 0)
1608                 goto unlock;
1609         /* in non-blocking, we don't wait in ioctl but let caller poll */
1610         if (nonblock) {
1611                 result = -EAGAIN;
1612                 goto unlock;
1613         }
1614
1615         for (;;) {
1616                 long tout;
1617                 struct snd_pcm_runtime *to_check;
1618                 if (signal_pending(current)) {
1619                         result = -ERESTARTSYS;
1620                         break;
1621                 }
1622                 /* find a substream to drain */
1623                 to_check = NULL;
1624                 snd_pcm_group_for_each_entry(s, substream) {
1625                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1626                                 continue;
1627                         runtime = s->runtime;
1628                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1629                                 to_check = runtime;
1630                                 break;
1631                         }
1632                 }
1633                 if (!to_check)
1634                         break; /* all drained */
1635                 init_waitqueue_entry(&wait, current);
1636                 add_wait_queue(&to_check->sleep, &wait);
1637                 snd_pcm_stream_unlock_irq(substream);
1638                 up_read(&snd_pcm_link_rwsem);
1639                 snd_power_unlock(card);
1640                 if (runtime->no_period_wakeup)
1641                         tout = MAX_SCHEDULE_TIMEOUT;
1642                 else {
1643                         tout = 10;
1644                         if (runtime->rate) {
1645                                 long t = runtime->period_size * 2 / runtime->rate;
1646                                 tout = max(t, tout);
1647                         }
1648                         tout = msecs_to_jiffies(tout * 1000);
1649                 }
1650                 tout = schedule_timeout_interruptible(tout);
1651                 snd_power_lock(card);
1652                 down_read(&snd_pcm_link_rwsem);
1653                 snd_pcm_stream_lock_irq(substream);
1654                 remove_wait_queue(&to_check->sleep, &wait);
1655                 if (card->shutdown) {
1656                         result = -ENODEV;
1657                         break;
1658                 }
1659                 if (tout == 0) {
1660                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1661                                 result = -ESTRPIPE;
1662                         else {
1663                                 dev_dbg(substream->pcm->card->dev,
1664                                         "playback drain error (DMA or IRQ trouble?)\n");
1665                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1666                                 result = -EIO;
1667                         }
1668                         break;
1669                 }
1670         }
1671
1672  unlock:
1673         snd_pcm_stream_unlock_irq(substream);
1674         up_read(&snd_pcm_link_rwsem);
1675         snd_power_unlock(card);
1676
1677         return result;
1678 }
1679
1680 /*
1681  * drop ioctl
1682  *
1683  * Immediately put all linked substreams into SETUP state.
1684  */
1685 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1686 {
1687         struct snd_pcm_runtime *runtime;
1688         int result = 0;
1689
1690         if (PCM_RUNTIME_CHECK(substream))
1691                 return -ENXIO;
1692         runtime = substream->runtime;
1693
1694         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1695             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1696             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1697                 return -EBADFD;
1698
1699         snd_pcm_stream_lock_irq(substream);
1700         /* resume pause */
1701         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1702                 snd_pcm_pause(substream, 0);
1703
1704         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1705         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1706         snd_pcm_stream_unlock_irq(substream);
1707
1708         return result;
1709 }
1710
1711
1712 static bool is_pcm_file(struct file *file)
1713 {
1714         struct inode *inode = file_inode(file);
1715         unsigned int minor;
1716
1717         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1718                 return false;
1719         minor = iminor(inode);
1720         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1721                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1722 }
1723
1724 /*
1725  * PCM link handling
1726  */
1727 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1728 {
1729         int res = 0;
1730         struct snd_pcm_file *pcm_file;
1731         struct snd_pcm_substream *substream1;
1732         struct snd_pcm_group *group;
1733         struct fd f = fdget(fd);
1734
1735         if (!f.file)
1736                 return -EBADFD;
1737         if (!is_pcm_file(f.file)) {
1738                 res = -EBADFD;
1739                 goto _badf;
1740         }
1741         pcm_file = f.file->private_data;
1742         substream1 = pcm_file->substream;
1743         group = kmalloc(sizeof(*group), GFP_KERNEL);
1744         if (!group) {
1745                 res = -ENOMEM;
1746                 goto _nolock;
1747         }
1748         down_write(&snd_pcm_link_rwsem);
1749         write_lock_irq(&snd_pcm_link_rwlock);
1750         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1751             substream->runtime->status->state != substream1->runtime->status->state ||
1752             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1753                 res = -EBADFD;
1754                 goto _end;
1755         }
1756         if (snd_pcm_stream_linked(substream1)) {
1757                 res = -EALREADY;
1758                 goto _end;
1759         }
1760         if (!snd_pcm_stream_linked(substream)) {
1761                 substream->group = group;
1762                 group = NULL;
1763                 spin_lock_init(&substream->group->lock);
1764                 mutex_init(&substream->group->mutex);
1765                 INIT_LIST_HEAD(&substream->group->substreams);
1766                 list_add_tail(&substream->link_list, &substream->group->substreams);
1767                 substream->group->count = 1;
1768         }
1769         list_add_tail(&substream1->link_list, &substream->group->substreams);
1770         substream->group->count++;
1771         substream1->group = substream->group;
1772  _end:
1773         write_unlock_irq(&snd_pcm_link_rwlock);
1774         up_write(&snd_pcm_link_rwsem);
1775  _nolock:
1776         snd_card_unref(substream1->pcm->card);
1777         kfree(group);
1778  _badf:
1779         fdput(f);
1780         return res;
1781 }
1782
1783 static void relink_to_local(struct snd_pcm_substream *substream)
1784 {
1785         substream->group = &substream->self_group;
1786         INIT_LIST_HEAD(&substream->self_group.substreams);
1787         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1788 }
1789
1790 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1791 {
1792         struct snd_pcm_substream *s;
1793         int res = 0;
1794
1795         down_write(&snd_pcm_link_rwsem);
1796         write_lock_irq(&snd_pcm_link_rwlock);
1797         if (!snd_pcm_stream_linked(substream)) {
1798                 res = -EALREADY;
1799                 goto _end;
1800         }
1801         list_del(&substream->link_list);
1802         substream->group->count--;
1803         if (substream->group->count == 1) {     /* detach the last stream, too */
1804                 snd_pcm_group_for_each_entry(s, substream) {
1805                         relink_to_local(s);
1806                         break;
1807                 }
1808                 kfree(substream->group);
1809         }
1810         relink_to_local(substream);
1811        _end:
1812         write_unlock_irq(&snd_pcm_link_rwlock);
1813         up_write(&snd_pcm_link_rwsem);
1814         return res;
1815 }
1816
1817 /*
1818  * hw configurator
1819  */
1820 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1821                                struct snd_pcm_hw_rule *rule)
1822 {
1823         struct snd_interval t;
1824         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1825                      hw_param_interval_c(params, rule->deps[1]), &t);
1826         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1827 }
1828
1829 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1830                                struct snd_pcm_hw_rule *rule)
1831 {
1832         struct snd_interval t;
1833         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1834                      hw_param_interval_c(params, rule->deps[1]), &t);
1835         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1836 }
1837
1838 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1839                                    struct snd_pcm_hw_rule *rule)
1840 {
1841         struct snd_interval t;
1842         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1843                          hw_param_interval_c(params, rule->deps[1]),
1844                          (unsigned long) rule->private, &t);
1845         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1846 }
1847
1848 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1849                                    struct snd_pcm_hw_rule *rule)
1850 {
1851         struct snd_interval t;
1852         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1853                          (unsigned long) rule->private,
1854                          hw_param_interval_c(params, rule->deps[1]), &t);
1855         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1856 }
1857
1858 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1859                                   struct snd_pcm_hw_rule *rule)
1860 {
1861         unsigned int k;
1862         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1863         struct snd_mask m;
1864         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1865         snd_mask_any(&m);
1866         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1867                 int bits;
1868                 if (! snd_mask_test(mask, k))
1869                         continue;
1870                 bits = snd_pcm_format_physical_width(k);
1871                 if (bits <= 0)
1872                         continue; /* ignore invalid formats */
1873                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1874                         snd_mask_reset(&m, k);
1875         }
1876         return snd_mask_refine(mask, &m);
1877 }
1878
1879 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1880                                        struct snd_pcm_hw_rule *rule)
1881 {
1882         struct snd_interval t;
1883         unsigned int k;
1884         t.min = UINT_MAX;
1885         t.max = 0;
1886         t.openmin = 0;
1887         t.openmax = 0;
1888         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1889                 int bits;
1890                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1891                         continue;
1892                 bits = snd_pcm_format_physical_width(k);
1893                 if (bits <= 0)
1894                         continue; /* ignore invalid formats */
1895                 if (t.min > (unsigned)bits)
1896                         t.min = bits;
1897                 if (t.max < (unsigned)bits)
1898                         t.max = bits;
1899         }
1900         t.integer = 1;
1901         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1902 }
1903
1904 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1905 #error "Change this table"
1906 #endif
1907
1908 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1909                                  48000, 64000, 88200, 96000, 176400, 192000 };
1910
1911 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1912         .count = ARRAY_SIZE(rates),
1913         .list = rates,
1914 };
1915
1916 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1917                                 struct snd_pcm_hw_rule *rule)
1918 {
1919         struct snd_pcm_hardware *hw = rule->private;
1920         return snd_interval_list(hw_param_interval(params, rule->var),
1921                                  snd_pcm_known_rates.count,
1922                                  snd_pcm_known_rates.list, hw->rates);
1923 }
1924
1925 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1926                                             struct snd_pcm_hw_rule *rule)
1927 {
1928         struct snd_interval t;
1929         struct snd_pcm_substream *substream = rule->private;
1930         t.min = 0;
1931         t.max = substream->buffer_bytes_max;
1932         t.openmin = 0;
1933         t.openmax = 0;
1934         t.integer = 1;
1935         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1936 }
1937
1938 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1939 {
1940         struct snd_pcm_runtime *runtime = substream->runtime;
1941         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1942         int k, err;
1943
1944         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1945                 snd_mask_any(constrs_mask(constrs, k));
1946         }
1947
1948         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1949                 snd_interval_any(constrs_interval(constrs, k));
1950         }
1951
1952         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1953         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1954         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1955         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1956         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1957
1958         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1959                                    snd_pcm_hw_rule_format, NULL,
1960                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1961         if (err < 0)
1962                 return err;
1963         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1964                                   snd_pcm_hw_rule_sample_bits, NULL,
1965                                   SNDRV_PCM_HW_PARAM_FORMAT,
1966                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1967         if (err < 0)
1968                 return err;
1969         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1970                                   snd_pcm_hw_rule_div, NULL,
1971                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1972         if (err < 0)
1973                 return err;
1974         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1975                                   snd_pcm_hw_rule_mul, NULL,
1976                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1977         if (err < 0)
1978                 return err;
1979         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1980                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1981                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1982         if (err < 0)
1983                 return err;
1984         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1985                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1986                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1987         if (err < 0)
1988                 return err;
1989         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1990                                   snd_pcm_hw_rule_div, NULL,
1991                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1992         if (err < 0)
1993                 return err;
1994         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1995                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1996                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1997         if (err < 0)
1998                 return err;
1999         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2000                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2001                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2002         if (err < 0)
2003                 return err;
2004         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2005                                   snd_pcm_hw_rule_div, NULL,
2006                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2007         if (err < 0)
2008                 return err;
2009         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2010                                   snd_pcm_hw_rule_div, NULL,
2011                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2012         if (err < 0)
2013                 return err;
2014         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2015                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2016                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2017         if (err < 0)
2018                 return err;
2019         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2020                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2021                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2022         if (err < 0)
2023                 return err;
2024         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2025                                   snd_pcm_hw_rule_mul, NULL,
2026                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2027         if (err < 0)
2028                 return err;
2029         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2030                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2031                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2032         if (err < 0)
2033                 return err;
2034         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2035                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2036                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2037         if (err < 0)
2038                 return err;
2039         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2040                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2041                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2042         if (err < 0)
2043                 return err;
2044         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2045                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2046                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2047         if (err < 0)
2048                 return err;
2049         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2050                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2051                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2052         if (err < 0)
2053                 return err;
2054         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2055                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2056                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2057         if (err < 0)
2058                 return err;
2059         return 0;
2060 }
2061
2062 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2063 {
2064         struct snd_pcm_runtime *runtime = substream->runtime;
2065         struct snd_pcm_hardware *hw = &runtime->hw;
2066         int err;
2067         unsigned int mask = 0;
2068
2069         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2070                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2071         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2072                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2073         if (hw->info & SNDRV_PCM_INFO_MMAP) {
2074                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2075                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2076                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2077                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2078                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2079                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2080         }
2081         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2082         if (err < 0)
2083                 return err;
2084
2085         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2086         if (err < 0)
2087                 return err;
2088
2089         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2090         if (err < 0)
2091                 return err;
2092
2093         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2094                                            hw->channels_min, hw->channels_max);
2095         if (err < 0)
2096                 return err;
2097
2098         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2099                                            hw->rate_min, hw->rate_max);
2100         if (err < 0)
2101                 return err;
2102
2103         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2104                                            hw->period_bytes_min, hw->period_bytes_max);
2105         if (err < 0)
2106                 return err;
2107
2108         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2109                                            hw->periods_min, hw->periods_max);
2110         if (err < 0)
2111                 return err;
2112
2113         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2114                                            hw->period_bytes_min, hw->buffer_bytes_max);
2115         if (err < 0)
2116                 return err;
2117
2118         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2119                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2120                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2121         if (err < 0)
2122                 return err;
2123
2124         /* FIXME: remove */
2125         if (runtime->dma_bytes) {
2126                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2127                 if (err < 0)
2128                         return err;
2129         }
2130
2131         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2132                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2133                                           snd_pcm_hw_rule_rate, hw,
2134                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2135                 if (err < 0)
2136                         return err;
2137         }
2138
2139         /* FIXME: this belong to lowlevel */
2140         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2141
2142         return 0;
2143 }
2144
2145 static void pcm_release_private(struct snd_pcm_substream *substream)
2146 {
2147         snd_pcm_unlink(substream);
2148 }
2149
2150 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2151 {
2152         substream->ref_count--;
2153         if (substream->ref_count > 0)
2154                 return;
2155
2156         snd_pcm_drop(substream);
2157         if (substream->hw_opened) {
2158                 if (substream->ops->hw_free != NULL)
2159                         substream->ops->hw_free(substream);
2160                 substream->ops->close(substream);
2161                 substream->hw_opened = 0;
2162         }
2163         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2164                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2165         if (substream->pcm_release) {
2166                 substream->pcm_release(substream);
2167                 substream->pcm_release = NULL;
2168         }
2169         snd_pcm_detach_substream(substream);
2170 }
2171
2172 EXPORT_SYMBOL(snd_pcm_release_substream);
2173
2174 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2175                            struct file *file,
2176                            struct snd_pcm_substream **rsubstream)
2177 {
2178         struct snd_pcm_substream *substream;
2179         int err;
2180
2181         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2182         if (err < 0)
2183                 return err;
2184         if (substream->ref_count > 1) {
2185                 *rsubstream = substream;
2186                 return 0;
2187         }
2188
2189         err = snd_pcm_hw_constraints_init(substream);
2190         if (err < 0) {
2191                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2192                 goto error;
2193         }
2194
2195         if ((err = substream->ops->open(substream)) < 0)
2196                 goto error;
2197
2198         substream->hw_opened = 1;
2199
2200         err = snd_pcm_hw_constraints_complete(substream);
2201         if (err < 0) {
2202                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2203                 goto error;
2204         }
2205
2206         *rsubstream = substream;
2207         return 0;
2208
2209  error:
2210         snd_pcm_release_substream(substream);
2211         return err;
2212 }
2213
2214 EXPORT_SYMBOL(snd_pcm_open_substream);
2215
2216 static int snd_pcm_open_file(struct file *file,
2217                              struct snd_pcm *pcm,
2218                              int stream)
2219 {
2220         struct snd_pcm_file *pcm_file;
2221         struct snd_pcm_substream *substream;
2222         int err;
2223
2224         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2225         if (err < 0)
2226                 return err;
2227
2228         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2229         if (pcm_file == NULL) {
2230                 snd_pcm_release_substream(substream);
2231                 return -ENOMEM;
2232         }
2233         pcm_file->substream = substream;
2234         if (substream->ref_count == 1) {
2235                 substream->file = pcm_file;
2236                 substream->pcm_release = pcm_release_private;
2237         }
2238         file->private_data = pcm_file;
2239
2240         return 0;
2241 }
2242
2243 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2244 {
2245         struct snd_pcm *pcm;
2246         int err = nonseekable_open(inode, file);
2247         if (err < 0)
2248                 return err;
2249         pcm = snd_lookup_minor_data(iminor(inode),
2250                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2251         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2252         if (pcm)
2253                 snd_card_unref(pcm->card);
2254         return err;
2255 }
2256
2257 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2258 {
2259         struct snd_pcm *pcm;
2260         int err = nonseekable_open(inode, file);
2261         if (err < 0)
2262                 return err;
2263         pcm = snd_lookup_minor_data(iminor(inode),
2264                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2265         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2266         if (pcm)
2267                 snd_card_unref(pcm->card);
2268         return err;
2269 }
2270
2271 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2272 {
2273         int err;
2274         wait_queue_t wait;
2275
2276         if (pcm == NULL) {
2277                 err = -ENODEV;
2278                 goto __error1;
2279         }
2280         err = snd_card_file_add(pcm->card, file);
2281         if (err < 0)
2282                 goto __error1;
2283         if (!try_module_get(pcm->card->module)) {
2284                 err = -EFAULT;
2285                 goto __error2;
2286         }
2287         init_waitqueue_entry(&wait, current);
2288         add_wait_queue(&pcm->open_wait, &wait);
2289         mutex_lock(&pcm->open_mutex);
2290         while (1) {
2291                 err = snd_pcm_open_file(file, pcm, stream);
2292                 if (err >= 0)
2293                         break;
2294                 if (err == -EAGAIN) {
2295                         if (file->f_flags & O_NONBLOCK) {
2296                                 err = -EBUSY;
2297                                 break;
2298                         }
2299                 } else
2300                         break;
2301                 set_current_state(TASK_INTERRUPTIBLE);
2302                 mutex_unlock(&pcm->open_mutex);
2303                 schedule();
2304                 mutex_lock(&pcm->open_mutex);
2305                 if (pcm->card->shutdown) {
2306                         err = -ENODEV;
2307                         break;
2308                 }
2309                 if (signal_pending(current)) {
2310                         err = -ERESTARTSYS;
2311                         break;
2312                 }
2313         }
2314         remove_wait_queue(&pcm->open_wait, &wait);
2315         mutex_unlock(&pcm->open_mutex);
2316         if (err < 0)
2317                 goto __error;
2318         return err;
2319
2320       __error:
2321         module_put(pcm->card->module);
2322       __error2:
2323         snd_card_file_remove(pcm->card, file);
2324       __error1:
2325         return err;
2326 }
2327
2328 static int snd_pcm_release(struct inode *inode, struct file *file)
2329 {
2330         struct snd_pcm *pcm;
2331         struct snd_pcm_substream *substream;
2332         struct snd_pcm_file *pcm_file;
2333
2334         pcm_file = file->private_data;
2335         substream = pcm_file->substream;
2336         if (snd_BUG_ON(!substream))
2337                 return -ENXIO;
2338         pcm = substream->pcm;
2339         mutex_lock(&pcm->open_mutex);
2340         snd_pcm_release_substream(substream);
2341         kfree(pcm_file);
2342         mutex_unlock(&pcm->open_mutex);
2343         wake_up(&pcm->open_wait);
2344         module_put(pcm->card->module);
2345         snd_card_file_remove(pcm->card, file);
2346         return 0;
2347 }
2348
2349 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2350                                                  snd_pcm_uframes_t frames)
2351 {
2352         struct snd_pcm_runtime *runtime = substream->runtime;
2353         snd_pcm_sframes_t appl_ptr;
2354         snd_pcm_sframes_t ret;
2355         snd_pcm_sframes_t hw_avail;
2356
2357         if (frames == 0)
2358                 return 0;
2359
2360         snd_pcm_stream_lock_irq(substream);
2361         switch (runtime->status->state) {
2362         case SNDRV_PCM_STATE_PREPARED:
2363                 break;
2364         case SNDRV_PCM_STATE_DRAINING:
2365         case SNDRV_PCM_STATE_RUNNING:
2366                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2367                         break;
2368                 /* Fall through */
2369         case SNDRV_PCM_STATE_XRUN:
2370                 ret = -EPIPE;
2371                 goto __end;
2372         case SNDRV_PCM_STATE_SUSPENDED:
2373                 ret = -ESTRPIPE;
2374                 goto __end;
2375         default:
2376                 ret = -EBADFD;
2377                 goto __end;
2378         }
2379
2380         hw_avail = snd_pcm_playback_hw_avail(runtime);
2381         if (hw_avail <= 0) {
2382                 ret = 0;
2383                 goto __end;
2384         }
2385         if (frames > (snd_pcm_uframes_t)hw_avail)
2386                 frames = hw_avail;
2387         appl_ptr = runtime->control->appl_ptr - frames;
2388         if (appl_ptr < 0)
2389                 appl_ptr += runtime->boundary;
2390         runtime->control->appl_ptr = appl_ptr;
2391         ret = frames;
2392  __end:
2393         snd_pcm_stream_unlock_irq(substream);
2394         return ret;
2395 }
2396
2397 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2398                                                 snd_pcm_uframes_t frames)
2399 {
2400         struct snd_pcm_runtime *runtime = substream->runtime;
2401         snd_pcm_sframes_t appl_ptr;
2402         snd_pcm_sframes_t ret;
2403         snd_pcm_sframes_t hw_avail;
2404
2405         if (frames == 0)
2406                 return 0;
2407
2408         snd_pcm_stream_lock_irq(substream);
2409         switch (runtime->status->state) {
2410         case SNDRV_PCM_STATE_PREPARED:
2411         case SNDRV_PCM_STATE_DRAINING:
2412                 break;
2413         case SNDRV_PCM_STATE_RUNNING:
2414                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2415                         break;
2416                 /* Fall through */
2417         case SNDRV_PCM_STATE_XRUN:
2418                 ret = -EPIPE;
2419                 goto __end;
2420         case SNDRV_PCM_STATE_SUSPENDED:
2421                 ret = -ESTRPIPE;
2422                 goto __end;
2423         default:
2424                 ret = -EBADFD;
2425                 goto __end;
2426         }
2427
2428         hw_avail = snd_pcm_capture_hw_avail(runtime);
2429         if (hw_avail <= 0) {
2430                 ret = 0;
2431                 goto __end;
2432         }
2433         if (frames > (snd_pcm_uframes_t)hw_avail)
2434                 frames = hw_avail;
2435         appl_ptr = runtime->control->appl_ptr - frames;
2436         if (appl_ptr < 0)
2437                 appl_ptr += runtime->boundary;
2438         runtime->control->appl_ptr = appl_ptr;
2439         ret = frames;
2440  __end:
2441         snd_pcm_stream_unlock_irq(substream);
2442         return ret;
2443 }
2444
2445 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2446                                                   snd_pcm_uframes_t frames)
2447 {
2448         struct snd_pcm_runtime *runtime = substream->runtime;
2449         snd_pcm_sframes_t appl_ptr;
2450         snd_pcm_sframes_t ret;
2451         snd_pcm_sframes_t avail;
2452
2453         if (frames == 0)
2454                 return 0;
2455
2456         snd_pcm_stream_lock_irq(substream);
2457         switch (runtime->status->state) {
2458         case SNDRV_PCM_STATE_PREPARED:
2459         case SNDRV_PCM_STATE_PAUSED:
2460                 break;
2461         case SNDRV_PCM_STATE_DRAINING:
2462         case SNDRV_PCM_STATE_RUNNING:
2463                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2464                         break;
2465                 /* Fall through */
2466         case SNDRV_PCM_STATE_XRUN:
2467                 ret = -EPIPE;
2468                 goto __end;
2469         case SNDRV_PCM_STATE_SUSPENDED:
2470                 ret = -ESTRPIPE;
2471                 goto __end;
2472         default:
2473                 ret = -EBADFD;
2474                 goto __end;
2475         }
2476
2477         avail = snd_pcm_playback_avail(runtime);
2478         if (avail <= 0) {
2479                 ret = 0;
2480                 goto __end;
2481         }
2482         if (frames > (snd_pcm_uframes_t)avail)
2483                 frames = avail;
2484         appl_ptr = runtime->control->appl_ptr + frames;
2485         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2486                 appl_ptr -= runtime->boundary;
2487         runtime->control->appl_ptr = appl_ptr;
2488         ret = frames;
2489  __end:
2490         snd_pcm_stream_unlock_irq(substream);
2491         return ret;
2492 }
2493
2494 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2495                                                  snd_pcm_uframes_t frames)
2496 {
2497         struct snd_pcm_runtime *runtime = substream->runtime;
2498         snd_pcm_sframes_t appl_ptr;
2499         snd_pcm_sframes_t ret;
2500         snd_pcm_sframes_t avail;
2501
2502         if (frames == 0)
2503                 return 0;
2504
2505         snd_pcm_stream_lock_irq(substream);
2506         switch (runtime->status->state) {
2507         case SNDRV_PCM_STATE_PREPARED:
2508         case SNDRV_PCM_STATE_DRAINING:
2509         case SNDRV_PCM_STATE_PAUSED:
2510                 break;
2511         case SNDRV_PCM_STATE_RUNNING:
2512                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2513                         break;
2514                 /* Fall through */
2515         case SNDRV_PCM_STATE_XRUN:
2516                 ret = -EPIPE;
2517                 goto __end;
2518         case SNDRV_PCM_STATE_SUSPENDED:
2519                 ret = -ESTRPIPE;
2520                 goto __end;
2521         default:
2522                 ret = -EBADFD;
2523                 goto __end;
2524         }
2525
2526         avail = snd_pcm_capture_avail(runtime);
2527         if (avail <= 0) {
2528                 ret = 0;
2529                 goto __end;
2530         }
2531         if (frames > (snd_pcm_uframes_t)avail)
2532                 frames = avail;
2533         appl_ptr = runtime->control->appl_ptr + frames;
2534         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2535                 appl_ptr -= runtime->boundary;
2536         runtime->control->appl_ptr = appl_ptr;
2537         ret = frames;
2538  __end:
2539         snd_pcm_stream_unlock_irq(substream);
2540         return ret;
2541 }
2542
2543 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2544 {
2545         struct snd_pcm_runtime *runtime = substream->runtime;
2546         int err;
2547
2548         snd_pcm_stream_lock_irq(substream);
2549         switch (runtime->status->state) {
2550         case SNDRV_PCM_STATE_DRAINING:
2551                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2552                         goto __badfd;
2553                 /* Fall through */
2554         case SNDRV_PCM_STATE_RUNNING:
2555                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2556                         break;
2557                 /* Fall through */
2558         case SNDRV_PCM_STATE_PREPARED:
2559         case SNDRV_PCM_STATE_SUSPENDED:
2560                 err = 0;
2561                 break;
2562         case SNDRV_PCM_STATE_XRUN:
2563                 err = -EPIPE;
2564                 break;
2565         default:
2566               __badfd:
2567                 err = -EBADFD;
2568                 break;
2569         }
2570         snd_pcm_stream_unlock_irq(substream);
2571         return err;
2572 }
2573
2574 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2575                          snd_pcm_sframes_t __user *res)
2576 {
2577         struct snd_pcm_runtime *runtime = substream->runtime;
2578         int err;
2579         snd_pcm_sframes_t n = 0;
2580
2581         snd_pcm_stream_lock_irq(substream);
2582         switch (runtime->status->state) {
2583         case SNDRV_PCM_STATE_DRAINING:
2584                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2585                         goto __badfd;
2586                 /* Fall through */
2587         case SNDRV_PCM_STATE_RUNNING:
2588                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2589                         break;
2590                 /* Fall through */
2591         case SNDRV_PCM_STATE_PREPARED:
2592         case SNDRV_PCM_STATE_SUSPENDED:
2593                 err = 0;
2594                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2595                         n = snd_pcm_playback_hw_avail(runtime);
2596                 else
2597                         n = snd_pcm_capture_avail(runtime);
2598                 n += runtime->delay;
2599                 break;
2600         case SNDRV_PCM_STATE_XRUN:
2601                 err = -EPIPE;
2602                 break;
2603         default:
2604               __badfd:
2605                 err = -EBADFD;
2606                 break;
2607         }
2608         snd_pcm_stream_unlock_irq(substream);
2609         if (!err)
2610                 if (put_user(n, res))
2611                         err = -EFAULT;
2612         return err;
2613 }
2614
2615 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2616                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2617 {
2618         struct snd_pcm_runtime *runtime = substream->runtime;
2619         struct snd_pcm_sync_ptr sync_ptr;
2620         volatile struct snd_pcm_mmap_status *status;
2621         volatile struct snd_pcm_mmap_control *control;
2622         int err;
2623
2624         memset(&sync_ptr, 0, sizeof(sync_ptr));
2625         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2626                 return -EFAULT;
2627         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2628                 return -EFAULT;
2629         status = runtime->status;
2630         control = runtime->control;
2631         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2632                 err = snd_pcm_hwsync(substream);
2633                 if (err < 0)
2634                         return err;
2635         }
2636         snd_pcm_stream_lock_irq(substream);
2637         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2638                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2639         else
2640                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2641         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2642                 control->avail_min = sync_ptr.c.control.avail_min;
2643         else
2644                 sync_ptr.c.control.avail_min = control->avail_min;
2645         sync_ptr.s.status.state = status->state;
2646         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2647         sync_ptr.s.status.tstamp = status->tstamp;
2648         sync_ptr.s.status.suspended_state = status->suspended_state;
2649         snd_pcm_stream_unlock_irq(substream);
2650         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2651                 return -EFAULT;
2652         return 0;
2653 }
2654
2655 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2656 {
2657         struct snd_pcm_runtime *runtime = substream->runtime;
2658         int arg;
2659
2660         if (get_user(arg, _arg))
2661                 return -EFAULT;
2662         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2663                 return -EINVAL;
2664         runtime->tstamp_type = arg;
2665         return 0;
2666 }
2667
2668 static int snd_pcm_common_ioctl1(struct file *file,
2669                                  struct snd_pcm_substream *substream,
2670                                  unsigned int cmd, void __user *arg)
2671 {
2672         switch (cmd) {
2673         case SNDRV_PCM_IOCTL_PVERSION:
2674                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2675         case SNDRV_PCM_IOCTL_INFO:
2676                 return snd_pcm_info_user(substream, arg);
2677         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2678                 return 0;
2679         case SNDRV_PCM_IOCTL_TTSTAMP:
2680                 return snd_pcm_tstamp(substream, arg);
2681         case SNDRV_PCM_IOCTL_HW_REFINE:
2682                 return snd_pcm_hw_refine_user(substream, arg);
2683         case SNDRV_PCM_IOCTL_HW_PARAMS:
2684                 return snd_pcm_hw_params_user(substream, arg);
2685         case SNDRV_PCM_IOCTL_HW_FREE:
2686                 return snd_pcm_hw_free(substream);
2687         case SNDRV_PCM_IOCTL_SW_PARAMS:
2688                 return snd_pcm_sw_params_user(substream, arg);
2689         case SNDRV_PCM_IOCTL_STATUS:
2690                 return snd_pcm_status_user(substream, arg);
2691         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2692                 return snd_pcm_channel_info_user(substream, arg);
2693         case SNDRV_PCM_IOCTL_PREPARE:
2694                 return snd_pcm_prepare(substream, file);
2695         case SNDRV_PCM_IOCTL_RESET:
2696                 return snd_pcm_reset(substream);
2697         case SNDRV_PCM_IOCTL_START:
2698                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2699         case SNDRV_PCM_IOCTL_LINK:
2700                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2701         case SNDRV_PCM_IOCTL_UNLINK:
2702                 return snd_pcm_unlink(substream);
2703         case SNDRV_PCM_IOCTL_RESUME:
2704                 return snd_pcm_resume(substream);
2705         case SNDRV_PCM_IOCTL_XRUN:
2706                 return snd_pcm_xrun(substream);
2707         case SNDRV_PCM_IOCTL_HWSYNC:
2708                 return snd_pcm_hwsync(substream);
2709         case SNDRV_PCM_IOCTL_DELAY:
2710                 return snd_pcm_delay(substream, arg);
2711         case SNDRV_PCM_IOCTL_SYNC_PTR:
2712                 return snd_pcm_sync_ptr(substream, arg);
2713 #ifdef CONFIG_SND_SUPPORT_OLD_API
2714         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2715                 return snd_pcm_hw_refine_old_user(substream, arg);
2716         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2717                 return snd_pcm_hw_params_old_user(substream, arg);
2718 #endif
2719         case SNDRV_PCM_IOCTL_DRAIN:
2720                 return snd_pcm_drain(substream, file);
2721         case SNDRV_PCM_IOCTL_DROP:
2722                 return snd_pcm_drop(substream);
2723         case SNDRV_PCM_IOCTL_PAUSE:
2724         {
2725                 int res;
2726                 snd_pcm_stream_lock_irq(substream);
2727                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2728                 snd_pcm_stream_unlock_irq(substream);
2729                 return res;
2730         }
2731         }
2732         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2733         return -ENOTTY;
2734 }
2735
2736 static int snd_pcm_playback_ioctl1(struct file *file,
2737                                    struct snd_pcm_substream *substream,
2738                                    unsigned int cmd, void __user *arg)
2739 {
2740         if (snd_BUG_ON(!substream))
2741                 return -ENXIO;
2742         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2743                 return -EINVAL;
2744         switch (cmd) {
2745         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2746         {
2747                 struct snd_xferi xferi;
2748                 struct snd_xferi __user *_xferi = arg;
2749                 struct snd_pcm_runtime *runtime = substream->runtime;
2750                 snd_pcm_sframes_t result;
2751                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2752                         return -EBADFD;
2753                 if (put_user(0, &_xferi->result))
2754                         return -EFAULT;
2755                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2756                         return -EFAULT;
2757                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2758                 __put_user(result, &_xferi->result);
2759                 return result < 0 ? result : 0;
2760         }
2761         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2762         {
2763                 struct snd_xfern xfern;
2764                 struct snd_xfern __user *_xfern = arg;
2765                 struct snd_pcm_runtime *runtime = substream->runtime;
2766                 void __user **bufs;
2767                 snd_pcm_sframes_t result;
2768                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2769                         return -EBADFD;
2770                 if (runtime->channels > 128)
2771                         return -EINVAL;
2772                 if (put_user(0, &_xfern->result))
2773                         return -EFAULT;
2774                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2775                         return -EFAULT;
2776
2777                 bufs = memdup_user(xfern.bufs,
2778                                    sizeof(void *) * runtime->channels);
2779                 if (IS_ERR(bufs))
2780                         return PTR_ERR(bufs);
2781                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2782                 kfree(bufs);
2783                 __put_user(result, &_xfern->result);
2784                 return result < 0 ? result : 0;
2785         }
2786         case SNDRV_PCM_IOCTL_REWIND:
2787         {
2788                 snd_pcm_uframes_t frames;
2789                 snd_pcm_uframes_t __user *_frames = arg;
2790                 snd_pcm_sframes_t result;
2791                 if (get_user(frames, _frames))
2792                         return -EFAULT;
2793                 if (put_user(0, _frames))
2794                         return -EFAULT;
2795                 result = snd_pcm_playback_rewind(substream, frames);
2796                 __put_user(result, _frames);
2797                 return result < 0 ? result : 0;
2798         }
2799         case SNDRV_PCM_IOCTL_FORWARD:
2800         {
2801                 snd_pcm_uframes_t frames;
2802                 snd_pcm_uframes_t __user *_frames = arg;
2803                 snd_pcm_sframes_t result;
2804                 if (get_user(frames, _frames))
2805                         return -EFAULT;
2806                 if (put_user(0, _frames))
2807                         return -EFAULT;
2808                 result = snd_pcm_playback_forward(substream, frames);
2809                 __put_user(result, _frames);
2810                 return result < 0 ? result : 0;
2811         }
2812         }
2813         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2814 }
2815
2816 static int snd_pcm_capture_ioctl1(struct file *file,
2817                                   struct snd_pcm_substream *substream,
2818                                   unsigned int cmd, void __user *arg)
2819 {
2820         if (snd_BUG_ON(!substream))
2821                 return -ENXIO;
2822         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2823                 return -EINVAL;
2824         switch (cmd) {
2825         case SNDRV_PCM_IOCTL_READI_FRAMES:
2826         {
2827                 struct snd_xferi xferi;
2828                 struct snd_xferi __user *_xferi = arg;
2829                 struct snd_pcm_runtime *runtime = substream->runtime;
2830                 snd_pcm_sframes_t result;
2831                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2832                         return -EBADFD;
2833                 if (put_user(0, &_xferi->result))
2834                         return -EFAULT;
2835                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2836                         return -EFAULT;
2837                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2838                 __put_user(result, &_xferi->result);
2839                 return result < 0 ? result : 0;
2840         }
2841         case SNDRV_PCM_IOCTL_READN_FRAMES:
2842         {
2843                 struct snd_xfern xfern;
2844                 struct snd_xfern __user *_xfern = arg;
2845                 struct snd_pcm_runtime *runtime = substream->runtime;
2846                 void *bufs;
2847                 snd_pcm_sframes_t result;
2848                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2849                         return -EBADFD;
2850                 if (runtime->channels > 128)
2851                         return -EINVAL;
2852                 if (put_user(0, &_xfern->result))
2853                         return -EFAULT;
2854                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2855                         return -EFAULT;
2856
2857                 bufs = memdup_user(xfern.bufs,
2858                                    sizeof(void *) * runtime->channels);
2859                 if (IS_ERR(bufs))
2860                         return PTR_ERR(bufs);
2861                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2862                 kfree(bufs);
2863                 __put_user(result, &_xfern->result);
2864                 return result < 0 ? result : 0;
2865         }
2866         case SNDRV_PCM_IOCTL_REWIND:
2867         {
2868                 snd_pcm_uframes_t frames;
2869                 snd_pcm_uframes_t __user *_frames = arg;
2870                 snd_pcm_sframes_t result;
2871                 if (get_user(frames, _frames))
2872                         return -EFAULT;
2873                 if (put_user(0, _frames))
2874                         return -EFAULT;
2875                 result = snd_pcm_capture_rewind(substream, frames);
2876                 __put_user(result, _frames);
2877                 return result < 0 ? result : 0;
2878         }
2879         case SNDRV_PCM_IOCTL_FORWARD:
2880         {
2881                 snd_pcm_uframes_t frames;
2882                 snd_pcm_uframes_t __user *_frames = arg;
2883                 snd_pcm_sframes_t result;
2884                 if (get_user(frames, _frames))
2885                         return -EFAULT;
2886                 if (put_user(0, _frames))
2887                         return -EFAULT;
2888                 result = snd_pcm_capture_forward(substream, frames);
2889                 __put_user(result, _frames);
2890                 return result < 0 ? result : 0;
2891         }
2892         }
2893         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2894 }
2895
2896 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2897                                    unsigned long arg)
2898 {
2899         struct snd_pcm_file *pcm_file;
2900
2901         pcm_file = file->private_data;
2902
2903         if (((cmd >> 8) & 0xff) != 'A')
2904                 return -ENOTTY;
2905
2906         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2907                                        (void __user *)arg);
2908 }
2909
2910 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2911                                   unsigned long arg)
2912 {
2913         struct snd_pcm_file *pcm_file;
2914
2915         pcm_file = file->private_data;
2916
2917         if (((cmd >> 8) & 0xff) != 'A')
2918                 return -ENOTTY;
2919
2920         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2921                                       (void __user *)arg);
2922 }
2923
2924 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2925                          unsigned int cmd, void *arg)
2926 {
2927         mm_segment_t fs;
2928         int result;
2929
2930         fs = snd_enter_user();
2931         switch (substream->stream) {
2932         case SNDRV_PCM_STREAM_PLAYBACK:
2933                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2934                                                  (void __user *)arg);
2935                 break;
2936         case SNDRV_PCM_STREAM_CAPTURE:
2937                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2938                                                 (void __user *)arg);
2939                 break;
2940         default:
2941                 result = -EINVAL;
2942                 break;
2943         }
2944         snd_leave_user(fs);
2945         return result;
2946 }
2947
2948 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2949
2950 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2951                             loff_t * offset)
2952 {
2953         struct snd_pcm_file *pcm_file;
2954         struct snd_pcm_substream *substream;
2955         struct snd_pcm_runtime *runtime;
2956         snd_pcm_sframes_t result;
2957
2958         pcm_file = file->private_data;
2959         substream = pcm_file->substream;
2960         if (PCM_RUNTIME_CHECK(substream))
2961                 return -ENXIO;
2962         runtime = substream->runtime;
2963         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2964                 return -EBADFD;
2965         if (!frame_aligned(runtime, count))
2966                 return -EINVAL;
2967         count = bytes_to_frames(runtime, count);
2968         result = snd_pcm_lib_read(substream, buf, count);
2969         if (result > 0)
2970                 result = frames_to_bytes(runtime, result);
2971         return result;
2972 }
2973
2974 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2975                              size_t count, loff_t * offset)
2976 {
2977         struct snd_pcm_file *pcm_file;
2978         struct snd_pcm_substream *substream;
2979         struct snd_pcm_runtime *runtime;
2980         snd_pcm_sframes_t result;
2981
2982         pcm_file = file->private_data;
2983         substream = pcm_file->substream;
2984         if (PCM_RUNTIME_CHECK(substream))
2985                 return -ENXIO;
2986         runtime = substream->runtime;
2987         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2988                 return -EBADFD;
2989         if (!frame_aligned(runtime, count))
2990                 return -EINVAL;
2991         count = bytes_to_frames(runtime, count);
2992         result = snd_pcm_lib_write(substream, buf, count);
2993         if (result > 0)
2994                 result = frames_to_bytes(runtime, result);
2995         return result;
2996 }
2997
2998 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2999                              unsigned long nr_segs, loff_t pos)
3000
3001 {
3002         struct snd_pcm_file *pcm_file;
3003         struct snd_pcm_substream *substream;
3004         struct snd_pcm_runtime *runtime;
3005         snd_pcm_sframes_t result;
3006         unsigned long i;
3007         void __user **bufs;
3008         snd_pcm_uframes_t frames;
3009
3010         pcm_file = iocb->ki_filp->private_data;
3011         substream = pcm_file->substream;
3012         if (PCM_RUNTIME_CHECK(substream))
3013                 return -ENXIO;
3014         runtime = substream->runtime;
3015         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3016                 return -EBADFD;
3017         if (nr_segs > 1024 || nr_segs != runtime->channels)
3018                 return -EINVAL;
3019         if (!frame_aligned(runtime, iov->iov_len))
3020                 return -EINVAL;
3021         frames = bytes_to_samples(runtime, iov->iov_len);
3022         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3023         if (bufs == NULL)
3024                 return -ENOMEM;
3025         for (i = 0; i < nr_segs; ++i)
3026                 bufs[i] = iov[i].iov_base;
3027         result = snd_pcm_lib_readv(substream, bufs, frames);
3028         if (result > 0)
3029                 result = frames_to_bytes(runtime, result);
3030         kfree(bufs);
3031         return result;
3032 }
3033
3034 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3035                               unsigned long nr_segs, loff_t pos)
3036 {
3037         struct snd_pcm_file *pcm_file;
3038         struct snd_pcm_substream *substream;
3039         struct snd_pcm_runtime *runtime;
3040         snd_pcm_sframes_t result;
3041         unsigned long i;
3042         void __user **bufs;
3043         snd_pcm_uframes_t frames;
3044
3045         pcm_file = iocb->ki_filp->private_data;
3046         substream = pcm_file->substream;
3047         if (PCM_RUNTIME_CHECK(substream))
3048                 return -ENXIO;
3049         runtime = substream->runtime;
3050         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3051                 return -EBADFD;
3052         if (nr_segs > 128 || nr_segs != runtime->channels ||
3053             !frame_aligned(runtime, iov->iov_len))
3054                 return -EINVAL;
3055         frames = bytes_to_samples(runtime, iov->iov_len);
3056         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3057         if (bufs == NULL)
3058                 return -ENOMEM;
3059         for (i = 0; i < nr_segs; ++i)
3060                 bufs[i] = iov[i].iov_base;
3061         result = snd_pcm_lib_writev(substream, bufs, frames);
3062         if (result > 0)
3063                 result = frames_to_bytes(runtime, result);
3064         kfree(bufs);
3065         return result;
3066 }
3067
3068 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3069 {
3070         struct snd_pcm_file *pcm_file;
3071         struct snd_pcm_substream *substream;
3072         struct snd_pcm_runtime *runtime;
3073         unsigned int mask;
3074         snd_pcm_uframes_t avail;
3075
3076         pcm_file = file->private_data;
3077
3078         substream = pcm_file->substream;
3079         if (PCM_RUNTIME_CHECK(substream))
3080                 return -ENXIO;
3081         runtime = substream->runtime;
3082
3083         poll_wait(file, &runtime->sleep, wait);
3084
3085         snd_pcm_stream_lock_irq(substream);
3086         avail = snd_pcm_playback_avail(runtime);
3087         switch (runtime->status->state) {
3088         case SNDRV_PCM_STATE_RUNNING:
3089         case SNDRV_PCM_STATE_PREPARED:
3090         case SNDRV_PCM_STATE_PAUSED:
3091                 if (avail >= runtime->control->avail_min) {
3092                         mask = POLLOUT | POLLWRNORM;
3093                         break;
3094                 }
3095                 /* Fall through */
3096         case SNDRV_PCM_STATE_DRAINING:
3097                 mask = 0;
3098                 break;
3099         default:
3100                 mask = POLLOUT | POLLWRNORM | POLLERR;
3101                 break;
3102         }
3103         snd_pcm_stream_unlock_irq(substream);
3104         return mask;
3105 }
3106
3107 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3108 {
3109         struct snd_pcm_file *pcm_file;
3110         struct snd_pcm_substream *substream;
3111         struct snd_pcm_runtime *runtime;
3112         unsigned int mask;
3113         snd_pcm_uframes_t avail;
3114
3115         pcm_file = file->private_data;
3116
3117         substream = pcm_file->substream;
3118         if (PCM_RUNTIME_CHECK(substream))
3119                 return -ENXIO;
3120         runtime = substream->runtime;
3121
3122         poll_wait(file, &runtime->sleep, wait);
3123
3124         snd_pcm_stream_lock_irq(substream);
3125         avail = snd_pcm_capture_avail(runtime);
3126         switch (runtime->status->state) {
3127         case SNDRV_PCM_STATE_RUNNING:
3128         case SNDRV_PCM_STATE_PREPARED:
3129         case SNDRV_PCM_STATE_PAUSED:
3130                 if (avail >= runtime->control->avail_min) {
3131                         mask = POLLIN | POLLRDNORM;
3132                         break;
3133                 }
3134                 mask = 0;
3135                 break;
3136         case SNDRV_PCM_STATE_DRAINING:
3137                 if (avail > 0) {
3138                         mask = POLLIN | POLLRDNORM;
3139                         break;
3140                 }
3141                 /* Fall through */
3142         default:
3143                 mask = POLLIN | POLLRDNORM | POLLERR;
3144                 break;
3145         }
3146         snd_pcm_stream_unlock_irq(substream);
3147         return mask;
3148 }
3149
3150 /*
3151  * mmap support
3152  */
3153
3154 /*
3155  * Only on coherent architectures, we can mmap the status and the control records
3156  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3157  */
3158 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3159 /*
3160  * mmap status record
3161  */
3162 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3163                                                 struct vm_fault *vmf)
3164 {
3165         struct snd_pcm_substream *substream = area->vm_private_data;
3166         struct snd_pcm_runtime *runtime;
3167
3168         if (substream == NULL)
3169                 return VM_FAULT_SIGBUS;
3170         runtime = substream->runtime;
3171         vmf->page = virt_to_page(runtime->status);
3172         get_page(vmf->page);
3173         return 0;
3174 }
3175
3176 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3177 {
3178         .fault =        snd_pcm_mmap_status_fault,
3179 };
3180
3181 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3182                                struct vm_area_struct *area)
3183 {
3184         long size;
3185         if (!(area->vm_flags & VM_READ))
3186                 return -EINVAL;
3187         size = area->vm_end - area->vm_start;
3188         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3189                 return -EINVAL;
3190         area->vm_ops = &snd_pcm_vm_ops_status;
3191         area->vm_private_data = substream;
3192         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3193         return 0;
3194 }
3195
3196 /*
3197  * mmap control record
3198  */
3199 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3200                                                 struct vm_fault *vmf)
3201 {
3202         struct snd_pcm_substream *substream = area->vm_private_data;
3203         struct snd_pcm_runtime *runtime;
3204
3205         if (substream == NULL)
3206                 return VM_FAULT_SIGBUS;
3207         runtime = substream->runtime;
3208         vmf->page = virt_to_page(runtime->control);
3209         get_page(vmf->page);
3210         return 0;
3211 }
3212
3213 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3214 {
3215         .fault =        snd_pcm_mmap_control_fault,
3216 };
3217
3218 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3219                                 struct vm_area_struct *area)
3220 {
3221         long size;
3222         if (!(area->vm_flags & VM_READ))
3223                 return -EINVAL;
3224         size = area->vm_end - area->vm_start;
3225         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3226                 return -EINVAL;
3227         area->vm_ops = &snd_pcm_vm_ops_control;
3228         area->vm_private_data = substream;
3229         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3230         return 0;
3231 }
3232 #else /* ! coherent mmap */
3233 /*
3234  * don't support mmap for status and control records.
3235  */
3236 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3237                                struct vm_area_struct *area)
3238 {
3239         return -ENXIO;
3240 }
3241 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3242                                 struct vm_area_struct *area)
3243 {
3244         return -ENXIO;
3245 }
3246 #endif /* coherent mmap */
3247
3248 static inline struct page *
3249 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3250 {
3251         void *vaddr = substream->runtime->dma_area + ofs;
3252 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3253         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3254                 return virt_to_page(CAC_ADDR(vaddr));
3255 #endif
3256 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3257         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3258                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3259                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3260                 /* assume dma_handle set via pfn_to_phys() in
3261                  * mm/dma-noncoherent.c
3262                  */
3263                 return pfn_to_page(addr >> PAGE_SHIFT);
3264         }
3265 #endif
3266         return virt_to_page(vaddr);
3267 }
3268
3269 /*
3270  * fault callback for mmapping a RAM page
3271  */
3272 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3273                                                 struct vm_fault *vmf)
3274 {
3275         struct snd_pcm_substream *substream = area->vm_private_data;
3276         struct snd_pcm_runtime *runtime;
3277         unsigned long offset;
3278         struct page * page;
3279         size_t dma_bytes;
3280
3281         if (substream == NULL)
3282                 return VM_FAULT_SIGBUS;
3283         runtime = substream->runtime;
3284         offset = vmf->pgoff << PAGE_SHIFT;
3285         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3286         if (offset > dma_bytes - PAGE_SIZE)
3287                 return VM_FAULT_SIGBUS;
3288         if (substream->ops->page)
3289                 page = substream->ops->page(substream, offset);
3290         else
3291                 page = snd_pcm_default_page_ops(substream, offset);
3292         if (!page)
3293                 return VM_FAULT_SIGBUS;
3294         get_page(page);
3295         vmf->page = page;
3296         return 0;
3297 }
3298
3299 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3300         .open =         snd_pcm_mmap_data_open,
3301         .close =        snd_pcm_mmap_data_close,
3302 };
3303
3304 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3305         .open =         snd_pcm_mmap_data_open,
3306         .close =        snd_pcm_mmap_data_close,
3307         .fault =        snd_pcm_mmap_data_fault,
3308 };
3309
3310 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3311 /* This should be defined / handled globally! */
3312 #if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
3313 #define ARCH_HAS_DMA_MMAP_COHERENT
3314 #endif
3315 #endif
3316
3317 /*
3318  * mmap the DMA buffer on RAM
3319  */
3320 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3321                              struct vm_area_struct *area)
3322 {
3323         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3324 #ifdef CONFIG_GENERIC_ALLOCATOR
3325         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3326                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3327                 return remap_pfn_range(area, area->vm_start,
3328                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3329                                 area->vm_end - area->vm_start, area->vm_page_prot);
3330         }
3331 #endif /* CONFIG_GENERIC_ALLOCATOR */
3332 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3333         if (!substream->ops->page &&
3334             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3335                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3336                                          area,
3337                                          substream->runtime->dma_area,
3338                                          substream->runtime->dma_addr,
3339                                          area->vm_end - area->vm_start);
3340 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3341         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3342             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3343                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3344 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3345         /* mmap with fault handler */
3346         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3347         return 0;
3348 }
3349 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3350
3351 /*
3352  * mmap the DMA buffer on I/O memory area
3353  */
3354 #if SNDRV_PCM_INFO_MMAP_IOMEM
3355 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3356                            struct vm_area_struct *area)
3357 {
3358         struct snd_pcm_runtime *runtime = substream->runtime;;
3359
3360         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3361         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3362 }
3363
3364 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3365 #endif /* SNDRV_PCM_INFO_MMAP */
3366
3367 /*
3368  * mmap DMA buffer
3369  */
3370 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3371                       struct vm_area_struct *area)
3372 {
3373         struct snd_pcm_runtime *runtime;
3374         long size;
3375         unsigned long offset;
3376         size_t dma_bytes;
3377         int err;
3378
3379         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3380                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3381                         return -EINVAL;
3382         } else {
3383                 if (!(area->vm_flags & VM_READ))
3384                         return -EINVAL;
3385         }
3386         runtime = substream->runtime;
3387         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3388                 return -EBADFD;
3389         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3390                 return -ENXIO;
3391         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3392             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3393                 return -EINVAL;
3394         size = area->vm_end - area->vm_start;
3395         offset = area->vm_pgoff << PAGE_SHIFT;
3396         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3397         if ((size_t)size > dma_bytes)
3398                 return -EINVAL;
3399         if (offset > dma_bytes - size)
3400                 return -EINVAL;
3401
3402         area->vm_ops = &snd_pcm_vm_ops_data;
3403         area->vm_private_data = substream;
3404         if (substream->ops->mmap)
3405                 err = substream->ops->mmap(substream, area);
3406         else
3407                 err = snd_pcm_lib_default_mmap(substream, area);
3408         if (!err)
3409                 atomic_inc(&substream->mmap_count);
3410         return err;
3411 }
3412
3413 EXPORT_SYMBOL(snd_pcm_mmap_data);
3414
3415 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3416 {
3417         struct snd_pcm_file * pcm_file;
3418         struct snd_pcm_substream *substream;
3419         unsigned long offset;
3420
3421         pcm_file = file->private_data;
3422         substream = pcm_file->substream;
3423         if (PCM_RUNTIME_CHECK(substream))
3424                 return -ENXIO;
3425
3426         offset = area->vm_pgoff << PAGE_SHIFT;
3427         switch (offset) {
3428         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3429                 if (pcm_file->no_compat_mmap)
3430                         return -ENXIO;
3431                 return snd_pcm_mmap_status(substream, file, area);
3432         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3433                 if (pcm_file->no_compat_mmap)
3434                         return -ENXIO;
3435                 return snd_pcm_mmap_control(substream, file, area);
3436         default:
3437                 return snd_pcm_mmap_data(substream, file, area);
3438         }
3439         return 0;
3440 }
3441
3442 static int snd_pcm_fasync(int fd, struct file * file, int on)
3443 {
3444         struct snd_pcm_file * pcm_file;
3445         struct snd_pcm_substream *substream;
3446         struct snd_pcm_runtime *runtime;
3447
3448         pcm_file = file->private_data;
3449         substream = pcm_file->substream;
3450         if (PCM_RUNTIME_CHECK(substream))
3451                 return -ENXIO;
3452         runtime = substream->runtime;
3453         return fasync_helper(fd, file, on, &runtime->fasync);
3454 }
3455
3456 /*
3457  * ioctl32 compat
3458  */
3459 #ifdef CONFIG_COMPAT
3460 #include "pcm_compat.c"
3461 #else
3462 #define snd_pcm_ioctl_compat    NULL
3463 #endif
3464
3465 /*
3466  *  To be removed helpers to keep binary compatibility
3467  */
3468
3469 #ifdef CONFIG_SND_SUPPORT_OLD_API
3470 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3471 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3472
3473 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3474                                                struct snd_pcm_hw_params_old *oparams)
3475 {
3476         unsigned int i;
3477
3478         memset(params, 0, sizeof(*params));
3479         params->flags = oparams->flags;
3480         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3481                 params->masks[i].bits[0] = oparams->masks[i];
3482         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3483         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3484         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3485         params->info = oparams->info;
3486         params->msbits = oparams->msbits;
3487         params->rate_num = oparams->rate_num;
3488         params->rate_den = oparams->rate_den;
3489         params->fifo_size = oparams->fifo_size;
3490 }
3491
3492 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3493                                              struct snd_pcm_hw_params *params)
3494 {
3495         unsigned int i;
3496
3497         memset(oparams, 0, sizeof(*oparams));
3498         oparams->flags = params->flags;
3499         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3500                 oparams->masks[i] = params->masks[i].bits[0];
3501         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3502         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3503         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3504         oparams->info = params->info;
3505         oparams->msbits = params->msbits;
3506         oparams->rate_num = params->rate_num;
3507         oparams->rate_den = params->rate_den;
3508         oparams->fifo_size = params->fifo_size;
3509 }
3510
3511 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3512                                       struct snd_pcm_hw_params_old __user * _oparams)
3513 {
3514         struct snd_pcm_hw_params *params;
3515         struct snd_pcm_hw_params_old *oparams = NULL;
3516         int err;
3517
3518         params = kmalloc(sizeof(*params), GFP_KERNEL);
3519         if (!params)
3520                 return -ENOMEM;
3521
3522         oparams = memdup_user(_oparams, sizeof(*oparams));
3523         if (IS_ERR(oparams)) {
3524                 err = PTR_ERR(oparams);
3525                 goto out;
3526         }
3527         snd_pcm_hw_convert_from_old_params(params, oparams);
3528         err = snd_pcm_hw_refine(substream, params);
3529         snd_pcm_hw_convert_to_old_params(oparams, params);
3530         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3531                 if (!err)
3532                         err = -EFAULT;
3533         }
3534
3535         kfree(oparams);
3536 out:
3537         kfree(params);
3538         return err;
3539 }
3540
3541 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3542                                       struct snd_pcm_hw_params_old __user * _oparams)
3543 {
3544         struct snd_pcm_hw_params *params;
3545         struct snd_pcm_hw_params_old *oparams = NULL;
3546         int err;
3547
3548         params = kmalloc(sizeof(*params), GFP_KERNEL);
3549         if (!params)
3550                 return -ENOMEM;
3551
3552         oparams = memdup_user(_oparams, sizeof(*oparams));
3553         if (IS_ERR(oparams)) {
3554                 err = PTR_ERR(oparams);
3555                 goto out;
3556         }
3557         snd_pcm_hw_convert_from_old_params(params, oparams);
3558         err = snd_pcm_hw_params(substream, params);
3559         snd_pcm_hw_convert_to_old_params(oparams, params);
3560         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3561                 if (!err)
3562                         err = -EFAULT;
3563         }
3564
3565         kfree(oparams);
3566 out:
3567         kfree(params);
3568         return err;
3569 }
3570 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3571
3572 #ifndef CONFIG_MMU
3573 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3574                                                unsigned long addr,
3575                                                unsigned long len,
3576                                                unsigned long pgoff,
3577                                                unsigned long flags)
3578 {
3579         struct snd_pcm_file *pcm_file = file->private_data;
3580         struct snd_pcm_substream *substream = pcm_file->substream;
3581         struct snd_pcm_runtime *runtime = substream->runtime;
3582         unsigned long offset = pgoff << PAGE_SHIFT;
3583
3584         switch (offset) {
3585         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3586                 return (unsigned long)runtime->status;
3587         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3588                 return (unsigned long)runtime->control;
3589         default:
3590                 return (unsigned long)runtime->dma_area + offset;
3591         }
3592 }
3593 #else
3594 # define snd_pcm_get_unmapped_area NULL
3595 #endif
3596
3597 /*
3598  *  Register section
3599  */
3600
3601 const struct file_operations snd_pcm_f_ops[2] = {
3602         {
3603                 .owner =                THIS_MODULE,
3604                 .write =                snd_pcm_write,
3605                 .aio_write =            snd_pcm_aio_write,
3606                 .open =                 snd_pcm_playback_open,
3607                 .release =              snd_pcm_release,
3608                 .llseek =               no_llseek,
3609                 .poll =                 snd_pcm_playback_poll,
3610                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3611                 .compat_ioctl =         snd_pcm_ioctl_compat,
3612                 .mmap =                 snd_pcm_mmap,
3613                 .fasync =               snd_pcm_fasync,
3614                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3615         },
3616         {
3617                 .owner =                THIS_MODULE,
3618                 .read =                 snd_pcm_read,
3619                 .aio_read =             snd_pcm_aio_read,
3620                 .open =                 snd_pcm_capture_open,
3621                 .release =              snd_pcm_release,
3622                 .llseek =               no_llseek,
3623                 .poll =                 snd_pcm_capture_poll,
3624                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3625                 .compat_ioctl =         snd_pcm_ioctl_compat,
3626                 .mmap =                 snd_pcm_mmap,
3627                 .fasync =               snd_pcm_fasync,
3628                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3629         }
3630 };