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;
 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,
 790                                                   SINGLE_DEPTH_NESTING);
 791                         else
 792                                 spin_lock_nested(&s->self_group.lock,
 793                                                  SINGLE_DEPTH_NESTING);
 794                 }
 795                 res = ops->pre_action(s, state);
 796                 if (res < 0)
 797                         goto _unlock;
 798         }
 799         snd_pcm_group_for_each_entry(s, substream) {
 800                 res = ops->do_action(s, state);
 801                 if (res < 0) {
 802                         if (ops->undo_action) {
 803                                 snd_pcm_group_for_each_entry(s1, substream) {
 804                                         if (s1 == s) /* failed stream */
 805                                                 break;
 806                                         ops->undo_action(s1, state);
 807                                 }
 808                         }
 809                         s = NULL; /* unlock all */
 810                         goto _unlock;
 811                 }
 812         }
 813         snd_pcm_group_for_each_entry(s, substream) {
 814                 ops->post_action(s, state);
 815         }
 816  _unlock:
 817         if (do_lock) {
 818                 /* unlock streams */
 819                 snd_pcm_group_for_each_entry(s1, substream) {
 820                         if (s1 != substream) {
 821                                 if (s1->pcm->nonatomic)
 822                                         mutex_unlock(&s1->self_group.mutex);
 823                                 else
 824                                         spin_unlock(&s1->self_group.lock);
 825                         }
 826                         if (s1 == s)    /* end */
 827                                 break;
 828                 }
 829         }
 830         return res;
 831 }
 832
 833 /*
 834  *  Note: call with stream lock
 835  */
 836 static int snd_pcm_action_single(struct action_ops *ops,
 837                                  struct snd_pcm_substream *substream,
 838                                  int state)
 839 {
 840         int res;
 841
 842         res = ops->pre_action(substream, state);
 843         if (res < 0)
 844                 return res;
 845         res = ops->do_action(substream, state);
 846         if (res == 0)
 847                 ops->post_action(substream, state);
 848         else if (ops->undo_action)
 849                 ops->undo_action(substream, state);
 850         return res;
 851 }
 852
 853 /* call in mutex-protected context */
 854 static int snd_pcm_action_mutex(struct action_ops *ops,
 855                                 struct snd_pcm_substream *substream,
 856                                 int state)
 857 {
 858         int res;
 859
 860         if (snd_pcm_stream_linked(substream)) {
 861                 if (!mutex_trylock(&substream->group->mutex)) {
 862                         mutex_unlock(&substream->self_group.mutex);
 863                         mutex_lock(&substream->group->mutex);
 864                         mutex_lock(&substream->self_group.mutex);
 865                 }
 866                 res = snd_pcm_action_group(ops, substream, state, 1);
 867                 mutex_unlock(&substream->group->mutex);
 868         } else {
 869                 res = snd_pcm_action_single(ops, substream, state);
 870         }
 871         return res;
 872 }
 873
 874 /*
 875  *  Note: call with stream lock
 876  */
 877 static int snd_pcm_action(struct action_ops *ops,
 878                           struct snd_pcm_substream *substream,
 879                           int state)
 880 {
 881         int res;
 882
 883         if (substream->pcm->nonatomic)
 884                 return snd_pcm_action_mutex(ops, substream, state);
 885
 886         if (snd_pcm_stream_linked(substream)) {
 887                 if (!spin_trylock(&substream->group->lock)) {
 888                         spin_unlock(&substream->self_group.lock);
 889                         spin_lock(&substream->group->lock);
 890                         spin_lock(&substream->self_group.lock);
 891                 }
 892                 res = snd_pcm_action_group(ops, substream, state, 1);
 893                 spin_unlock(&substream->group->lock);
 894         } else {
 895                 res = snd_pcm_action_single(ops, substream, state);
 896         }
 897         return res;
 898 }
 899
 900 static int snd_pcm_action_lock_mutex(struct action_ops *ops,
 901                                      struct snd_pcm_substream *substream,
 902                                      int state)
 903 {
 904         int res;
 905
 906         down_read(&snd_pcm_link_rwsem);
 907         if (snd_pcm_stream_linked(substream)) {
 908                 mutex_lock(&substream->group->mutex);
 909                 mutex_lock_nested(&substream->self_group.mutex,
 910                                   SINGLE_DEPTH_NESTING);
 911                 res = snd_pcm_action_group(ops, substream, state, 1);
 912                 mutex_unlock(&substream->self_group.mutex);
 913                 mutex_unlock(&substream->group->mutex);
 914         } else {
 915                 mutex_lock(&substream->self_group.mutex);
 916                 res = snd_pcm_action_single(ops, substream, state);
 917                 mutex_unlock(&substream->self_group.mutex);
 918         }
 919         up_read(&snd_pcm_link_rwsem);
 920         return res;
 921 }
 922
 923 /*
 924  *  Note: don't use any locks before
 925  */
 926 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 927                                    struct snd_pcm_substream *substream,
 928                                    int state)
 929 {
 930         int res;
 931
 932         if (substream->pcm->nonatomic)
 933                 return snd_pcm_action_lock_mutex(ops, substream, state);
 934
 935         read_lock_irq(&snd_pcm_link_rwlock);
 936         if (snd_pcm_stream_linked(substream)) {
 937                 spin_lock(&substream->group->lock);
 938                 spin_lock(&substream->self_group.lock);
 939                 res = snd_pcm_action_group(ops, substream, state, 1);
 940                 spin_unlock(&substream->self_group.lock);
 941                 spin_unlock(&substream->group->lock);
 942         } else {
 943                 spin_lock(&substream->self_group.lock);
 944                 res = snd_pcm_action_single(ops, substream, state);
 945                 spin_unlock(&substream->self_group.lock);
 946         }
 947         read_unlock_irq(&snd_pcm_link_rwlock);
 948         return res;
 949 }
 950
 951 /*
 952  */
 953 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 954                                     struct snd_pcm_substream *substream,
 955                                     int state)
 956 {
 957         int res;
 958
 959         down_read(&snd_pcm_link_rwsem);
 960         if (snd_pcm_stream_linked(substream))
 961                 res = snd_pcm_action_group(ops, substream, state, 0);
 962         else
 963                 res = snd_pcm_action_single(ops, substream, state);
 964         up_read(&snd_pcm_link_rwsem);
 965         return res;
 966 }
 967
 968 /*
 969  * start callbacks
 970  */
 971 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 972 {
 973         struct snd_pcm_runtime *runtime = substream->runtime;
 974         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 975                 return -EBADFD;
 976         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 977             !snd_pcm_playback_data(substream))
 978                 return -EPIPE;
 979         runtime->trigger_master = substream;
 980         return 0;
 981 }
 982
 983 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 984 {
 985         if (substream->runtime->trigger_master != substream)
 986                 return 0;
 987         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 988 }
 989
 990 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 991 {
 992         if (substream->runtime->trigger_master == substream)
 993                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 994 }
 995
 996 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 997 {
 998         struct snd_pcm_runtime *runtime = substream->runtime;
 999         snd_pcm_trigger_tstamp(substream);
1000         runtime->hw_ptr_jiffies = jiffies;
1001         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1002                                                             runtime->rate;
1003         runtime->status->state = state;
1004         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1005             runtime->silence_size > 0)
1006                 snd_pcm_playback_silence(substream, ULONG_MAX);
1007         if (substream->timer)
1008                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1009                                  &runtime->trigger_tstamp);
1010 }
1011
1012 static struct action_ops snd_pcm_action_start = {
1013         .pre_action = snd_pcm_pre_start,
1014         .do_action = snd_pcm_do_start,
1015         .undo_action = snd_pcm_undo_start,
1016         .post_action = snd_pcm_post_start
1017 };
1018
1019 /**
1020  * snd_pcm_start - start all linked streams
1021  * @substream: the PCM substream instance
1022  *
1023  * Return: Zero if successful, or a negative error code.
1024  */
1025 int snd_pcm_start(struct snd_pcm_substream *substream)
1026 {
1027         return snd_pcm_action(&snd_pcm_action_start, substream,
1028                               SNDRV_PCM_STATE_RUNNING);
1029 }
1030
1031 /*
1032  * stop callbacks
1033  */
1034 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1035 {
1036         struct snd_pcm_runtime *runtime = substream->runtime;
1037         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1038                 return -EBADFD;
1039         runtime->trigger_master = substream;
1040         return 0;
1041 }
1042
1043 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1044 {
1045         if (substream->runtime->trigger_master == substream &&
1046             snd_pcm_running(substream))
1047                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1048         return 0; /* unconditonally stop all substreams */
1049 }
1050
1051 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1052 {
1053         struct snd_pcm_runtime *runtime = substream->runtime;
1054         if (runtime->status->state != state) {
1055                 snd_pcm_trigger_tstamp(substream);
1056                 if (substream->timer)
1057                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1058                                          &runtime->trigger_tstamp);
1059                 runtime->status->state = state;
1060         }
1061         wake_up(&runtime->sleep);
1062         wake_up(&runtime->tsleep);
1063 }
1064
1065 static struct action_ops snd_pcm_action_stop = {
1066         .pre_action = snd_pcm_pre_stop,
1067         .do_action = snd_pcm_do_stop,
1068         .post_action = snd_pcm_post_stop
1069 };
1070
1071 /**
1072  * snd_pcm_stop - try to stop all running streams in the substream group
1073  * @substream: the PCM substream instance
1074  * @state: PCM state after stopping the stream
1075  *
1076  * The state of each stream is then changed to the given state unconditionally.
1077  *
1078  * Return: Zero if successful, or a negative error code.
1079  */
1080 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1081 {
1082         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1083 }
1084
1085 EXPORT_SYMBOL(snd_pcm_stop);
1086
1087 /**
1088  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1089  * @substream: the PCM substream
1090  *
1091  * After stopping, the state is changed to SETUP.
1092  * Unlike snd_pcm_stop(), this affects only the given stream.
1093  *
1094  * Return: Zero if succesful, or a negative error code.
1095  */
1096 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1097 {
1098         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1099                                      SNDRV_PCM_STATE_SETUP);
1100 }
1101
1102 /*
1103  * pause callbacks
1104  */
1105 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1106 {
1107         struct snd_pcm_runtime *runtime = substream->runtime;
1108         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1109                 return -ENOSYS;
1110         if (push) {
1111                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1112                         return -EBADFD;
1113         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1114                 return -EBADFD;
1115         runtime->trigger_master = substream;
1116         return 0;
1117 }
1118
1119 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1120 {
1121         if (substream->runtime->trigger_master != substream)
1122                 return 0;
1123         /* some drivers might use hw_ptr to recover from the pause -
1124            update the hw_ptr now */
1125         if (push)
1126                 snd_pcm_update_hw_ptr(substream);
1127         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1128          * a delta between the current jiffies, this gives a large enough
1129          * delta, effectively to skip the check once.
1130          */
1131         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1132         return substream->ops->trigger(substream,
1133                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1134                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1135 }
1136
1137 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1138 {
1139         if (substream->runtime->trigger_master == substream)
1140                 substream->ops->trigger(substream,
1141                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1142                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1143 }
1144
1145 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1146 {
1147         struct snd_pcm_runtime *runtime = substream->runtime;
1148         snd_pcm_trigger_tstamp(substream);
1149         if (push) {
1150                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1151                 if (substream->timer)
1152                         snd_timer_notify(substream->timer,
1153                                          SNDRV_TIMER_EVENT_MPAUSE,
1154                                          &runtime->trigger_tstamp);
1155                 wake_up(&runtime->sleep);
1156                 wake_up(&runtime->tsleep);
1157         } else {
1158                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1159                 if (substream->timer)
1160                         snd_timer_notify(substream->timer,
1161                                          SNDRV_TIMER_EVENT_MCONTINUE,
1162                                          &runtime->trigger_tstamp);
1163         }
1164 }
1165
1166 static struct action_ops snd_pcm_action_pause = {
1167         .pre_action = snd_pcm_pre_pause,
1168         .do_action = snd_pcm_do_pause,
1169         .undo_action = snd_pcm_undo_pause,
1170         .post_action = snd_pcm_post_pause
1171 };
1172
1173 /*
1174  * Push/release the pause for all linked streams.
1175  */
1176 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1177 {
1178         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1179 }
1180
1181 #ifdef CONFIG_PM
1182 /* suspend */
1183
1184 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1185 {
1186         struct snd_pcm_runtime *runtime = substream->runtime;
1187         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1188                 return -EBUSY;
1189         runtime->trigger_master = substream;
1190         return 0;
1191 }
1192
1193 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1194 {
1195         struct snd_pcm_runtime *runtime = substream->runtime;
1196         if (runtime->trigger_master != substream)
1197                 return 0;
1198         if (! snd_pcm_running(substream))
1199                 return 0;
1200         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1201         return 0; /* suspend unconditionally */
1202 }
1203
1204 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1205 {
1206         struct snd_pcm_runtime *runtime = substream->runtime;
1207         snd_pcm_trigger_tstamp(substream);
1208         if (substream->timer)
1209                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1210                                  &runtime->trigger_tstamp);
1211         runtime->status->suspended_state = runtime->status->state;
1212         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1213         wake_up(&runtime->sleep);
1214         wake_up(&runtime->tsleep);
1215 }
1216
1217 static struct action_ops snd_pcm_action_suspend = {
1218         .pre_action = snd_pcm_pre_suspend,
1219         .do_action = snd_pcm_do_suspend,
1220         .post_action = snd_pcm_post_suspend
1221 };
1222
1223 /**
1224  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1225  * @substream: the PCM substream
1226  *
1227  * After this call, all streams are changed to SUSPENDED state.
1228  *
1229  * Return: Zero if successful (or @substream is %NULL), or a negative error
1230  * code.
1231  */
1232 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1233 {
1234         int err;
1235         unsigned long flags;
1236
1237         if (! substream)
1238                 return 0;
1239
1240         snd_pcm_stream_lock_irqsave(substream, flags);
1241         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1242         snd_pcm_stream_unlock_irqrestore(substream, flags);
1243         return err;
1244 }
1245
1246 EXPORT_SYMBOL(snd_pcm_suspend);
1247
1248 /**
1249  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1250  * @pcm: the PCM instance
1251  *
1252  * After this call, all streams are changed to SUSPENDED state.
1253  *
1254  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1255  */
1256 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1257 {
1258         struct snd_pcm_substream *substream;
1259         int stream, err = 0;
1260
1261         if (! pcm)
1262                 return 0;
1263
1264         for (stream = 0; stream < 2; stream++) {
1265                 for (substream = pcm->streams[stream].substream;
1266                      substream; substream = substream->next) {
1267                         /* FIXME: the open/close code should lock this as well */
1268                         if (substream->runtime == NULL)
1269                                 continue;
1270                         err = snd_pcm_suspend(substream);
1271                         if (err < 0 && err != -EBUSY)
1272                                 return err;
1273                 }
1274         }
1275         return 0;
1276 }
1277
1278 EXPORT_SYMBOL(snd_pcm_suspend_all);
1279
1280 /* resume */
1281
1282 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1283 {
1284         struct snd_pcm_runtime *runtime = substream->runtime;
1285         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1286                 return -ENOSYS;
1287         runtime->trigger_master = substream;
1288         return 0;
1289 }
1290
1291 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1292 {
1293         struct snd_pcm_runtime *runtime = substream->runtime;
1294         if (runtime->trigger_master != substream)
1295                 return 0;
1296         /* DMA not running previously? */
1297         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1298             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1299              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1300                 return 0;
1301         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1302 }
1303
1304 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1305 {
1306         if (substream->runtime->trigger_master == substream &&
1307             snd_pcm_running(substream))
1308                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1309 }
1310
1311 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1312 {
1313         struct snd_pcm_runtime *runtime = substream->runtime;
1314         snd_pcm_trigger_tstamp(substream);
1315         if (substream->timer)
1316                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1317                                  &runtime->trigger_tstamp);
1318         runtime->status->state = runtime->status->suspended_state;
1319 }
1320
1321 static struct action_ops snd_pcm_action_resume = {
1322         .pre_action = snd_pcm_pre_resume,
1323         .do_action = snd_pcm_do_resume,
1324         .undo_action = snd_pcm_undo_resume,
1325         .post_action = snd_pcm_post_resume
1326 };
1327
1328 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1329 {
1330         struct snd_card *card = substream->pcm->card;
1331         int res;
1332
1333         snd_power_lock(card);
1334         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1335                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1336         snd_power_unlock(card);
1337         return res;
1338 }
1339
1340 #else
1341
1342 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1343 {
1344         return -ENOSYS;
1345 }
1346
1347 #endif /* CONFIG_PM */
1348
1349 /*
1350  * xrun ioctl
1351  *
1352  * Change the RUNNING stream(s) to XRUN state.
1353  */
1354 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1355 {
1356         struct snd_card *card = substream->pcm->card;
1357         struct snd_pcm_runtime *runtime = substream->runtime;
1358         int result;
1359
1360         snd_power_lock(card);
1361         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1362                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1363                 if (result < 0)
1364                         goto _unlock;
1365         }
1366
1367         snd_pcm_stream_lock_irq(substream);
1368         switch (runtime->status->state) {
1369         case SNDRV_PCM_STATE_XRUN:
1370                 result = 0;     /* already there */
1371                 break;
1372         case SNDRV_PCM_STATE_RUNNING:
1373                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1374                 break;
1375         default:
1376                 result = -EBADFD;
1377         }
1378         snd_pcm_stream_unlock_irq(substream);
1379  _unlock:
1380         snd_power_unlock(card);
1381         return result;
1382 }
1383
1384 /*
1385  * reset ioctl
1386  */
1387 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1388 {
1389         struct snd_pcm_runtime *runtime = substream->runtime;
1390         switch (runtime->status->state) {
1391         case SNDRV_PCM_STATE_RUNNING:
1392         case SNDRV_PCM_STATE_PREPARED:
1393         case SNDRV_PCM_STATE_PAUSED:
1394         case SNDRV_PCM_STATE_SUSPENDED:
1395                 return 0;
1396         default:
1397                 return -EBADFD;
1398         }
1399 }
1400
1401 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1402 {
1403         struct snd_pcm_runtime *runtime = substream->runtime;
1404         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1405         if (err < 0)
1406                 return err;
1407         runtime->hw_ptr_base = 0;
1408         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1409                 runtime->status->hw_ptr % runtime->period_size;
1410         runtime->silence_start = runtime->status->hw_ptr;
1411         runtime->silence_filled = 0;
1412         return 0;
1413 }
1414
1415 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1416 {
1417         struct snd_pcm_runtime *runtime = substream->runtime;
1418         runtime->control->appl_ptr = runtime->status->hw_ptr;
1419         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1420             runtime->silence_size > 0)
1421                 snd_pcm_playback_silence(substream, ULONG_MAX);
1422 }
1423
1424 static struct action_ops snd_pcm_action_reset = {
1425         .pre_action = snd_pcm_pre_reset,
1426         .do_action = snd_pcm_do_reset,
1427         .post_action = snd_pcm_post_reset
1428 };
1429
1430 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1431 {
1432         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1433 }
1434
1435 /*
1436  * prepare ioctl
1437  */
1438 /* we use the second argument for updating f_flags */
1439 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1440                                int f_flags)
1441 {
1442         struct snd_pcm_runtime *runtime = substream->runtime;
1443         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1444             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1445                 return -EBADFD;
1446         if (snd_pcm_running(substream))
1447                 return -EBUSY;
1448         substream->f_flags = f_flags;
1449         return 0;
1450 }
1451
1452 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1453 {
1454         int err;
1455         err = substream->ops->prepare(substream);
1456         if (err < 0)
1457                 return err;
1458         return snd_pcm_do_reset(substream, 0);
1459 }
1460
1461 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1462 {
1463         struct snd_pcm_runtime *runtime = substream->runtime;
1464         runtime->control->appl_ptr = runtime->status->hw_ptr;
1465         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1466 }
1467
1468 static struct action_ops snd_pcm_action_prepare = {
1469         .pre_action = snd_pcm_pre_prepare,
1470         .do_action = snd_pcm_do_prepare,
1471         .post_action = snd_pcm_post_prepare
1472 };
1473
1474 /**
1475  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1476  * @substream: the PCM substream instance
1477  * @file: file to refer f_flags
1478  *
1479  * Return: Zero if successful, or a negative error code.
1480  */
1481 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1482                            struct file *file)
1483 {
1484         int res;
1485         struct snd_card *card = substream->pcm->card;
1486         int f_flags;
1487
1488         if (file)
1489                 f_flags = file->f_flags;
1490         else
1491                 f_flags = substream->f_flags;
1492
1493         snd_power_lock(card);
1494         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1495                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1496                                                substream, f_flags);
1497         snd_power_unlock(card);
1498         return res;
1499 }
1500
1501 /*
1502  * drain ioctl
1503  */
1504
1505 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1506 {
1507         struct snd_pcm_runtime *runtime = substream->runtime;
1508         switch (runtime->status->state) {
1509         case SNDRV_PCM_STATE_OPEN:
1510         case SNDRV_PCM_STATE_DISCONNECTED:
1511         case SNDRV_PCM_STATE_SUSPENDED:
1512                 return -EBADFD;
1513         }
1514         runtime->trigger_master = substream;
1515         return 0;
1516 }
1517
1518 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1519 {
1520         struct snd_pcm_runtime *runtime = substream->runtime;
1521         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1522                 switch (runtime->status->state) {
1523                 case SNDRV_PCM_STATE_PREPARED:
1524                         /* start playback stream if possible */
1525                         if (! snd_pcm_playback_empty(substream)) {
1526                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1527                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1528                         }
1529                         break;
1530                 case SNDRV_PCM_STATE_RUNNING:
1531                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1532                         break;
1533                 case SNDRV_PCM_STATE_XRUN:
1534                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1535                         break;
1536                 default:
1537                         break;
1538                 }
1539         } else {
1540                 /* stop running stream */
1541                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1542                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1543                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1544                         snd_pcm_do_stop(substream, new_state);
1545                         snd_pcm_post_stop(substream, new_state);
1546                 }
1547         }
1548         return 0;
1549 }
1550
1551 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1552 {
1553 }
1554
1555 static struct action_ops snd_pcm_action_drain_init = {
1556         .pre_action = snd_pcm_pre_drain_init,
1557         .do_action = snd_pcm_do_drain_init,
1558         .post_action = snd_pcm_post_drain_init
1559 };
1560
1561 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1562
1563 /*
1564  * Drain the stream(s).
1565  * When the substream is linked, sync until the draining of all playback streams
1566  * is finished.
1567  * After this call, all streams are supposed to be either SETUP or DRAINING
1568  * (capture only) state.
1569  */
1570 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1571                          struct file *file)
1572 {
1573         struct snd_card *card;
1574         struct snd_pcm_runtime *runtime;
1575         struct snd_pcm_substream *s;
1576         wait_queue_t wait;
1577         int result = 0;
1578         int nonblock = 0;
1579
1580         card = substream->pcm->card;
1581         runtime = substream->runtime;
1582
1583         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1584                 return -EBADFD;
1585
1586         snd_power_lock(card);
1587         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1588                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1589                 if (result < 0) {
1590                         snd_power_unlock(card);
1591                         return result;
1592                 }
1593         }
1594
1595         if (file) {
1596                 if (file->f_flags & O_NONBLOCK)
1597                         nonblock = 1;
1598         } else if (substream->f_flags & O_NONBLOCK)
1599                 nonblock = 1;
1600
1601         down_read(&snd_pcm_link_rwsem);
1602         snd_pcm_stream_lock_irq(substream);
1603         /* resume pause */
1604         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1605                 snd_pcm_pause(substream, 0);
1606
1607         /* pre-start/stop - all running streams are changed to DRAINING state */
1608         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1609         if (result < 0)
1610                 goto unlock;
1611         /* in non-blocking, we don't wait in ioctl but let caller poll */
1612         if (nonblock) {
1613                 result = -EAGAIN;
1614                 goto unlock;
1615         }
1616
1617         for (;;) {
1618                 long tout;
1619                 struct snd_pcm_runtime *to_check;
1620                 if (signal_pending(current)) {
1621                         result = -ERESTARTSYS;
1622                         break;
1623                 }
1624                 /* find a substream to drain */
1625                 to_check = NULL;
1626                 snd_pcm_group_for_each_entry(s, substream) {
1627                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1628                                 continue;
1629                         runtime = s->runtime;
1630                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1631                                 to_check = runtime;
1632                                 break;
1633                         }
1634                 }
1635                 if (!to_check)
1636                         break; /* all drained */
1637                 init_waitqueue_entry(&wait, current);
1638                 add_wait_queue(&to_check->sleep, &wait);
1639                 snd_pcm_stream_unlock_irq(substream);
1640                 up_read(&snd_pcm_link_rwsem);
1641                 snd_power_unlock(card);
1642                 if (runtime->no_period_wakeup)
1643                         tout = MAX_SCHEDULE_TIMEOUT;
1644                 else {
1645                         tout = 10;
1646                         if (runtime->rate) {
1647                                 long t = runtime->period_size * 2 / runtime->rate;
1648                                 tout = max(t, tout);
1649                         }
1650                         tout = msecs_to_jiffies(tout * 1000);
1651                 }
1652                 tout = schedule_timeout_interruptible(tout);
1653                 snd_power_lock(card);
1654                 down_read(&snd_pcm_link_rwsem);
1655                 snd_pcm_stream_lock_irq(substream);
1656                 remove_wait_queue(&to_check->sleep, &wait);
1657                 if (card->shutdown) {
1658                         result = -ENODEV;
1659                         break;
1660                 }
1661                 if (tout == 0) {
1662                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1663                                 result = -ESTRPIPE;
1664                         else {
1665                                 dev_dbg(substream->pcm->card->dev,
1666                                         "playback drain error (DMA or IRQ trouble?)\n");
1667                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1668                                 result = -EIO;
1669                         }
1670                         break;
1671                 }
1672         }
1673
1674  unlock:
1675         snd_pcm_stream_unlock_irq(substream);
1676         up_read(&snd_pcm_link_rwsem);
1677         snd_power_unlock(card);
1678
1679         return result;
1680 }
1681
1682 /*
1683  * drop ioctl
1684  *
1685  * Immediately put all linked substreams into SETUP state.
1686  */
1687 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1688 {
1689         struct snd_pcm_runtime *runtime;
1690         int result = 0;
1691
1692         if (PCM_RUNTIME_CHECK(substream))
1693                 return -ENXIO;
1694         runtime = substream->runtime;
1695
1696         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1697             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1698             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1699                 return -EBADFD;
1700
1701         snd_pcm_stream_lock_irq(substream);
1702         /* resume pause */
1703         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1704                 snd_pcm_pause(substream, 0);
1705
1706         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1707         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1708         snd_pcm_stream_unlock_irq(substream);
1709
1710         return result;
1711 }
1712
1713
1714 static bool is_pcm_file(struct file *file)
1715 {
1716         struct inode *inode = file_inode(file);
1717         unsigned int minor;
1718
1719         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1720                 return false;
1721         minor = iminor(inode);
1722         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1723                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1724 }
1725
1726 /*
1727  * PCM link handling
1728  */
1729 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1730 {
1731         int res = 0;
1732         struct snd_pcm_file *pcm_file;
1733         struct snd_pcm_substream *substream1;
1734         struct snd_pcm_group *group;
1735         struct fd f = fdget(fd);
1736
1737         if (!f.file)
1738                 return -EBADFD;
1739         if (!is_pcm_file(f.file)) {
1740                 res = -EBADFD;
1741                 goto _badf;
1742         }
1743         pcm_file = f.file->private_data;
1744         substream1 = pcm_file->substream;
1745         group = kmalloc(sizeof(*group), GFP_KERNEL);
1746         if (!group) {
1747                 res = -ENOMEM;
1748                 goto _nolock;
1749         }
1750         down_write(&snd_pcm_link_rwsem);
1751         write_lock_irq(&snd_pcm_link_rwlock);
1752         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1753             substream->runtime->status->state != substream1->runtime->status->state ||
1754             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1755                 res = -EBADFD;
1756                 goto _end;
1757         }
1758         if (snd_pcm_stream_linked(substream1)) {
1759                 res = -EALREADY;
1760                 goto _end;
1761         }
1762         if (!snd_pcm_stream_linked(substream)) {
1763                 substream->group = group;
1764                 group = NULL;
1765                 spin_lock_init(&substream->group->lock);
1766                 mutex_init(&substream->group->mutex);
1767                 INIT_LIST_HEAD(&substream->group->substreams);
1768                 list_add_tail(&substream->link_list, &substream->group->substreams);
1769                 substream->group->count = 1;
1770         }
1771         list_add_tail(&substream1->link_list, &substream->group->substreams);
1772         substream->group->count++;
1773         substream1->group = substream->group;
1774  _end:
1775         write_unlock_irq(&snd_pcm_link_rwlock);
1776         up_write(&snd_pcm_link_rwsem);
1777  _nolock:
1778         snd_card_unref(substream1->pcm->card);
1779         kfree(group);
1780  _badf:
1781         fdput(f);
1782         return res;
1783 }
1784
1785 static void relink_to_local(struct snd_pcm_substream *substream)
1786 {
1787         substream->group = &substream->self_group;
1788         INIT_LIST_HEAD(&substream->self_group.substreams);
1789         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1790 }
1791
1792 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1793 {
1794         struct snd_pcm_substream *s;
1795         int res = 0;
1796
1797         down_write(&snd_pcm_link_rwsem);
1798         write_lock_irq(&snd_pcm_link_rwlock);
1799         if (!snd_pcm_stream_linked(substream)) {
1800                 res = -EALREADY;
1801                 goto _end;
1802         }
1803         list_del(&substream->link_list);
1804         substream->group->count--;
1805         if (substream->group->count == 1) {     /* detach the last stream, too */
1806                 snd_pcm_group_for_each_entry(s, substream) {
1807                         relink_to_local(s);
1808                         break;
1809                 }
1810                 kfree(substream->group);
1811         }
1812         relink_to_local(substream);
1813        _end:
1814         write_unlock_irq(&snd_pcm_link_rwlock);
1815         up_write(&snd_pcm_link_rwsem);
1816         return res;
1817 }
1818
1819 /*
1820  * hw configurator
1821  */
1822 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1823                                struct snd_pcm_hw_rule *rule)
1824 {
1825         struct snd_interval t;
1826         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1827                      hw_param_interval_c(params, rule->deps[1]), &t);
1828         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1829 }
1830
1831 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1832                                struct snd_pcm_hw_rule *rule)
1833 {
1834         struct snd_interval t;
1835         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1836                      hw_param_interval_c(params, rule->deps[1]), &t);
1837         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1838 }
1839
1840 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1841                                    struct snd_pcm_hw_rule *rule)
1842 {
1843         struct snd_interval t;
1844         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1845                          hw_param_interval_c(params, rule->deps[1]),
1846                          (unsigned long) rule->private, &t);
1847         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1848 }
1849
1850 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1851                                    struct snd_pcm_hw_rule *rule)
1852 {
1853         struct snd_interval t;
1854         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1855                          (unsigned long) rule->private,
1856                          hw_param_interval_c(params, rule->deps[1]), &t);
1857         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1858 }
1859
1860 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1861                                   struct snd_pcm_hw_rule *rule)
1862 {
1863         unsigned int k;
1864         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1865         struct snd_mask m;
1866         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1867         snd_mask_any(&m);
1868         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1869                 int bits;
1870                 if (! snd_mask_test(mask, k))
1871                         continue;
1872                 bits = snd_pcm_format_physical_width(k);
1873                 if (bits <= 0)
1874                         continue; /* ignore invalid formats */
1875                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1876                         snd_mask_reset(&m, k);
1877         }
1878         return snd_mask_refine(mask, &m);
1879 }
1880
1881 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1882                                        struct snd_pcm_hw_rule *rule)
1883 {
1884         struct snd_interval t;
1885         unsigned int k;
1886         t.min = UINT_MAX;
1887         t.max = 0;
1888         t.openmin = 0;
1889         t.openmax = 0;
1890         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1891                 int bits;
1892                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1893                         continue;
1894                 bits = snd_pcm_format_physical_width(k);
1895                 if (bits <= 0)
1896                         continue; /* ignore invalid formats */
1897                 if (t.min > (unsigned)bits)
1898                         t.min = bits;
1899                 if (t.max < (unsigned)bits)
1900                         t.max = bits;
1901         }
1902         t.integer = 1;
1903         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1904 }
1905
1906 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1907 #error "Change this table"
1908 #endif
1909
1910 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1911                                  48000, 64000, 88200, 96000, 176400, 192000 };
1912
1913 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1914         .count = ARRAY_SIZE(rates),
1915         .list = rates,
1916 };
1917
1918 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1919                                 struct snd_pcm_hw_rule *rule)
1920 {
1921         struct snd_pcm_hardware *hw = rule->private;
1922         return snd_interval_list(hw_param_interval(params, rule->var),
1923                                  snd_pcm_known_rates.count,
1924                                  snd_pcm_known_rates.list, hw->rates);
1925 }
1926
1927 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1928                                             struct snd_pcm_hw_rule *rule)
1929 {
1930         struct snd_interval t;
1931         struct snd_pcm_substream *substream = rule->private;
1932         t.min = 0;
1933         t.max = substream->buffer_bytes_max;
1934         t.openmin = 0;
1935         t.openmax = 0;
1936         t.integer = 1;
1937         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1938 }
1939
1940 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1941 {
1942         struct snd_pcm_runtime *runtime = substream->runtime;
1943         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1944         int k, err;
1945
1946         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1947                 snd_mask_any(constrs_mask(constrs, k));
1948         }
1949
1950         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1951                 snd_interval_any(constrs_interval(constrs, k));
1952         }
1953
1954         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1955         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1956         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1957         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1958         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1959
1960         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1961                                    snd_pcm_hw_rule_format, NULL,
1962                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1963         if (err < 0)
1964                 return err;
1965         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1966                                   snd_pcm_hw_rule_sample_bits, NULL,
1967                                   SNDRV_PCM_HW_PARAM_FORMAT,
1968                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1969         if (err < 0)
1970                 return err;
1971         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1972                                   snd_pcm_hw_rule_div, NULL,
1973                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1974         if (err < 0)
1975                 return err;
1976         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1977                                   snd_pcm_hw_rule_mul, NULL,
1978                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1979         if (err < 0)
1980                 return err;
1981         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1982                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1983                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1984         if (err < 0)
1985                 return err;
1986         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1987                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1988                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1989         if (err < 0)
1990                 return err;
1991         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1992                                   snd_pcm_hw_rule_div, NULL,
1993                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1994         if (err < 0)
1995                 return err;
1996         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1997                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1998                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1999         if (err < 0)
2000                 return err;
2001         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2002                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2003                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2004         if (err < 0)
2005                 return err;
2006         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2007                                   snd_pcm_hw_rule_div, NULL,
2008                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2009         if (err < 0)
2010                 return err;
2011         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2012                                   snd_pcm_hw_rule_div, NULL,
2013                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2014         if (err < 0)
2015                 return err;
2016         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2017                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2018                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2019         if (err < 0)
2020                 return err;
2021         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2022                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2023                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2024         if (err < 0)
2025                 return err;
2026         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2027                                   snd_pcm_hw_rule_mul, NULL,
2028                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2029         if (err < 0)
2030                 return err;
2031         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2032                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2033                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2034         if (err < 0)
2035                 return err;
2036         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2037                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2038                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2039         if (err < 0)
2040                 return err;
2041         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2042                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2043                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2044         if (err < 0)
2045                 return err;
2046         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2047                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2048                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2049         if (err < 0)
2050                 return err;
2051         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2052                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2053                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2054         if (err < 0)
2055                 return err;
2056         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2057                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2058                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2059         if (err < 0)
2060                 return err;
2061         return 0;
2062 }
2063
2064 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2065 {
2066         struct snd_pcm_runtime *runtime = substream->runtime;
2067         struct snd_pcm_hardware *hw = &runtime->hw;
2068         int err;
2069         unsigned int mask = 0;
2070
2071         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2072                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2073         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2074                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2075         if (hw->info & SNDRV_PCM_INFO_MMAP) {
2076                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2077                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2078                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2079                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2080                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2081                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2082         }
2083         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2084         if (err < 0)
2085                 return err;
2086
2087         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2088         if (err < 0)
2089                 return err;
2090
2091         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2092         if (err < 0)
2093                 return err;
2094
2095         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2096                                            hw->channels_min, hw->channels_max);
2097         if (err < 0)
2098                 return err;
2099
2100         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2101                                            hw->rate_min, hw->rate_max);
2102         if (err < 0)
2103                 return err;
2104
2105         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2106                                            hw->period_bytes_min, hw->period_bytes_max);
2107         if (err < 0)
2108                 return err;
2109
2110         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2111                                            hw->periods_min, hw->periods_max);
2112         if (err < 0)
2113                 return err;
2114
2115         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2116                                            hw->period_bytes_min, hw->buffer_bytes_max);
2117         if (err < 0)
2118                 return err;
2119
2120         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2121                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2122                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2123         if (err < 0)
2124                 return err;
2125
2126         /* FIXME: remove */
2127         if (runtime->dma_bytes) {
2128                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2129                 if (err < 0)
2130                         return err;
2131         }
2132
2133         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2134                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2135                                           snd_pcm_hw_rule_rate, hw,
2136                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2137                 if (err < 0)
2138                         return err;
2139         }
2140
2141         /* FIXME: this belong to lowlevel */
2142         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2143
2144         return 0;
2145 }
2146
2147 static void pcm_release_private(struct snd_pcm_substream *substream)
2148 {
2149         snd_pcm_unlink(substream);
2150 }
2151
2152 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2153 {
2154         substream->ref_count--;
2155         if (substream->ref_count > 0)
2156                 return;
2157
2158         snd_pcm_drop(substream);
2159         if (substream->hw_opened) {
2160                 if (substream->ops->hw_free != NULL)
2161                         substream->ops->hw_free(substream);
2162                 substream->ops->close(substream);
2163                 substream->hw_opened = 0;
2164         }
2165         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2166                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2167         if (substream->pcm_release) {
2168                 substream->pcm_release(substream);
2169                 substream->pcm_release = NULL;
2170         }
2171         snd_pcm_detach_substream(substream);
2172 }
2173
2174 EXPORT_SYMBOL(snd_pcm_release_substream);
2175
2176 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2177                            struct file *file,
2178                            struct snd_pcm_substream **rsubstream)
2179 {
2180         struct snd_pcm_substream *substream;
2181         int err;
2182
2183         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2184         if (err < 0)
2185                 return err;
2186         if (substream->ref_count > 1) {
2187                 *rsubstream = substream;
2188                 return 0;
2189         }
2190
2191         err = snd_pcm_hw_constraints_init(substream);
2192         if (err < 0) {
2193                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2194                 goto error;
2195         }
2196
2197         if ((err = substream->ops->open(substream)) < 0)
2198                 goto error;
2199
2200         substream->hw_opened = 1;
2201
2202         err = snd_pcm_hw_constraints_complete(substream);
2203         if (err < 0) {
2204                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2205                 goto error;
2206         }
2207
2208         *rsubstream = substream;
2209         return 0;
2210
2211  error:
2212         snd_pcm_release_substream(substream);
2213         return err;
2214 }
2215
2216 EXPORT_SYMBOL(snd_pcm_open_substream);
2217
2218 static int snd_pcm_open_file(struct file *file,
2219                              struct snd_pcm *pcm,
2220                              int stream)
2221 {
2222         struct snd_pcm_file *pcm_file;
2223         struct snd_pcm_substream *substream;
2224         int err;
2225
2226         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2227         if (err < 0)
2228                 return err;
2229
2230         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2231         if (pcm_file == NULL) {
2232                 snd_pcm_release_substream(substream);
2233                 return -ENOMEM;
2234         }
2235         pcm_file->substream = substream;
2236         if (substream->ref_count == 1) {
2237                 substream->file = pcm_file;
2238                 substream->pcm_release = pcm_release_private;
2239         }
2240         file->private_data = pcm_file;
2241
2242         return 0;
2243 }
2244
2245 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2246 {
2247         struct snd_pcm *pcm;
2248         int err = nonseekable_open(inode, file);
2249         if (err < 0)
2250                 return err;
2251         pcm = snd_lookup_minor_data(iminor(inode),
2252                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2253         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2254         if (pcm)
2255                 snd_card_unref(pcm->card);
2256         return err;
2257 }
2258
2259 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2260 {
2261         struct snd_pcm *pcm;
2262         int err = nonseekable_open(inode, file);
2263         if (err < 0)
2264                 return err;
2265         pcm = snd_lookup_minor_data(iminor(inode),
2266                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2267         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2268         if (pcm)
2269                 snd_card_unref(pcm->card);
2270         return err;
2271 }
2272
2273 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2274 {
2275         int err;
2276         wait_queue_t wait;
2277
2278         if (pcm == NULL) {
2279                 err = -ENODEV;
2280                 goto __error1;
2281         }
2282         err = snd_card_file_add(pcm->card, file);
2283         if (err < 0)
2284                 goto __error1;
2285         if (!try_module_get(pcm->card->module)) {
2286                 err = -EFAULT;
2287                 goto __error2;
2288         }
2289         init_waitqueue_entry(&wait, current);
2290         add_wait_queue(&pcm->open_wait, &wait);
2291         mutex_lock(&pcm->open_mutex);
2292         while (1) {
2293                 err = snd_pcm_open_file(file, pcm, stream);
2294                 if (err >= 0)
2295                         break;
2296                 if (err == -EAGAIN) {
2297                         if (file->f_flags & O_NONBLOCK) {
2298                                 err = -EBUSY;
2299                                 break;
2300                         }
2301                 } else
2302                         break;
2303                 set_current_state(TASK_INTERRUPTIBLE);
2304                 mutex_unlock(&pcm->open_mutex);
2305                 schedule();
2306                 mutex_lock(&pcm->open_mutex);
2307                 if (pcm->card->shutdown) {
2308                         err = -ENODEV;
2309                         break;
2310                 }
2311                 if (signal_pending(current)) {
2312                         err = -ERESTARTSYS;
2313                         break;
2314                 }
2315         }
2316         remove_wait_queue(&pcm->open_wait, &wait);
2317         mutex_unlock(&pcm->open_mutex);
2318         if (err < 0)
2319                 goto __error;
2320         return err;
2321
2322       __error:
2323         module_put(pcm->card->module);
2324       __error2:
2325         snd_card_file_remove(pcm->card, file);
2326       __error1:
2327         return err;
2328 }
2329
2330 static int snd_pcm_release(struct inode *inode, struct file *file)
2331 {
2332         struct snd_pcm *pcm;
2333         struct snd_pcm_substream *substream;
2334         struct snd_pcm_file *pcm_file;
2335
2336         pcm_file = file->private_data;
2337         substream = pcm_file->substream;
2338         if (snd_BUG_ON(!substream))
2339                 return -ENXIO;
2340         pcm = substream->pcm;
2341         mutex_lock(&pcm->open_mutex);
2342         snd_pcm_release_substream(substream);
2343         kfree(pcm_file);
2344         mutex_unlock(&pcm->open_mutex);
2345         wake_up(&pcm->open_wait);
2346         module_put(pcm->card->module);
2347         snd_card_file_remove(pcm->card, file);
2348         return 0;
2349 }
2350
2351 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2352                                                  snd_pcm_uframes_t frames)
2353 {
2354         struct snd_pcm_runtime *runtime = substream->runtime;
2355         snd_pcm_sframes_t appl_ptr;
2356         snd_pcm_sframes_t ret;
2357         snd_pcm_sframes_t hw_avail;
2358
2359         if (frames == 0)
2360                 return 0;
2361
2362         snd_pcm_stream_lock_irq(substream);
2363         switch (runtime->status->state) {
2364         case SNDRV_PCM_STATE_PREPARED:
2365                 break;
2366         case SNDRV_PCM_STATE_DRAINING:
2367         case SNDRV_PCM_STATE_RUNNING:
2368                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2369                         break;
2370                 /* Fall through */
2371         case SNDRV_PCM_STATE_XRUN:
2372                 ret = -EPIPE;
2373                 goto __end;
2374         case SNDRV_PCM_STATE_SUSPENDED:
2375                 ret = -ESTRPIPE;
2376                 goto __end;
2377         default:
2378                 ret = -EBADFD;
2379                 goto __end;
2380         }
2381
2382         hw_avail = snd_pcm_playback_hw_avail(runtime);
2383         if (hw_avail <= 0) {
2384                 ret = 0;
2385                 goto __end;
2386         }
2387         if (frames > (snd_pcm_uframes_t)hw_avail)
2388                 frames = hw_avail;
2389         appl_ptr = runtime->control->appl_ptr - frames;
2390         if (appl_ptr < 0)
2391                 appl_ptr += runtime->boundary;
2392         runtime->control->appl_ptr = appl_ptr;
2393         ret = frames;
2394  __end:
2395         snd_pcm_stream_unlock_irq(substream);
2396         return ret;
2397 }
2398
2399 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2400                                                 snd_pcm_uframes_t frames)
2401 {
2402         struct snd_pcm_runtime *runtime = substream->runtime;
2403         snd_pcm_sframes_t appl_ptr;
2404         snd_pcm_sframes_t ret;
2405         snd_pcm_sframes_t hw_avail;
2406
2407         if (frames == 0)
2408                 return 0;
2409
2410         snd_pcm_stream_lock_irq(substream);
2411         switch (runtime->status->state) {
2412         case SNDRV_PCM_STATE_PREPARED:
2413         case SNDRV_PCM_STATE_DRAINING:
2414                 break;
2415         case SNDRV_PCM_STATE_RUNNING:
2416                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2417                         break;
2418                 /* Fall through */
2419         case SNDRV_PCM_STATE_XRUN:
2420                 ret = -EPIPE;
2421                 goto __end;
2422         case SNDRV_PCM_STATE_SUSPENDED:
2423                 ret = -ESTRPIPE;
2424                 goto __end;
2425         default:
2426                 ret = -EBADFD;
2427                 goto __end;
2428         }
2429
2430         hw_avail = snd_pcm_capture_hw_avail(runtime);
2431         if (hw_avail <= 0) {
2432                 ret = 0;
2433                 goto __end;
2434         }
2435         if (frames > (snd_pcm_uframes_t)hw_avail)
2436                 frames = hw_avail;
2437         appl_ptr = runtime->control->appl_ptr - frames;
2438         if (appl_ptr < 0)
2439                 appl_ptr += runtime->boundary;
2440         runtime->control->appl_ptr = appl_ptr;
2441         ret = frames;
2442  __end:
2443         snd_pcm_stream_unlock_irq(substream);
2444         return ret;
2445 }
2446
2447 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2448                                                   snd_pcm_uframes_t frames)
2449 {
2450         struct snd_pcm_runtime *runtime = substream->runtime;
2451         snd_pcm_sframes_t appl_ptr;
2452         snd_pcm_sframes_t ret;
2453         snd_pcm_sframes_t avail;
2454
2455         if (frames == 0)
2456                 return 0;
2457
2458         snd_pcm_stream_lock_irq(substream);
2459         switch (runtime->status->state) {
2460         case SNDRV_PCM_STATE_PREPARED:
2461         case SNDRV_PCM_STATE_PAUSED:
2462                 break;
2463         case SNDRV_PCM_STATE_DRAINING:
2464         case SNDRV_PCM_STATE_RUNNING:
2465                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2466                         break;
2467                 /* Fall through */
2468         case SNDRV_PCM_STATE_XRUN:
2469                 ret = -EPIPE;
2470                 goto __end;
2471         case SNDRV_PCM_STATE_SUSPENDED:
2472                 ret = -ESTRPIPE;
2473                 goto __end;
2474         default:
2475                 ret = -EBADFD;
2476                 goto __end;
2477         }
2478
2479         avail = snd_pcm_playback_avail(runtime);
2480         if (avail <= 0) {
2481                 ret = 0;
2482                 goto __end;
2483         }
2484         if (frames > (snd_pcm_uframes_t)avail)
2485                 frames = avail;
2486         appl_ptr = runtime->control->appl_ptr + frames;
2487         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2488                 appl_ptr -= runtime->boundary;
2489         runtime->control->appl_ptr = appl_ptr;
2490         ret = frames;
2491  __end:
2492         snd_pcm_stream_unlock_irq(substream);
2493         return ret;
2494 }
2495
2496 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2497                                                  snd_pcm_uframes_t frames)
2498 {
2499         struct snd_pcm_runtime *runtime = substream->runtime;
2500         snd_pcm_sframes_t appl_ptr;
2501         snd_pcm_sframes_t ret;
2502         snd_pcm_sframes_t avail;
2503
2504         if (frames == 0)
2505                 return 0;
2506
2507         snd_pcm_stream_lock_irq(substream);
2508         switch (runtime->status->state) {
2509         case SNDRV_PCM_STATE_PREPARED:
2510         case SNDRV_PCM_STATE_DRAINING:
2511         case SNDRV_PCM_STATE_PAUSED:
2512                 break;
2513         case SNDRV_PCM_STATE_RUNNING:
2514                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2515                         break;
2516                 /* Fall through */
2517         case SNDRV_PCM_STATE_XRUN:
2518                 ret = -EPIPE;
2519                 goto __end;
2520         case SNDRV_PCM_STATE_SUSPENDED:
2521                 ret = -ESTRPIPE;
2522                 goto __end;
2523         default:
2524                 ret = -EBADFD;
2525                 goto __end;
2526         }
2527
2528         avail = snd_pcm_capture_avail(runtime);
2529         if (avail <= 0) {
2530                 ret = 0;
2531                 goto __end;
2532         }
2533         if (frames > (snd_pcm_uframes_t)avail)
2534                 frames = avail;
2535         appl_ptr = runtime->control->appl_ptr + frames;
2536         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2537                 appl_ptr -= runtime->boundary;
2538         runtime->control->appl_ptr = appl_ptr;
2539         ret = frames;
2540  __end:
2541         snd_pcm_stream_unlock_irq(substream);
2542         return ret;
2543 }
2544
2545 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2546 {
2547         struct snd_pcm_runtime *runtime = substream->runtime;
2548         int err;
2549
2550         snd_pcm_stream_lock_irq(substream);
2551         switch (runtime->status->state) {
2552         case SNDRV_PCM_STATE_DRAINING:
2553                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2554                         goto __badfd;
2555                 /* Fall through */
2556         case SNDRV_PCM_STATE_RUNNING:
2557                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2558                         break;
2559                 /* Fall through */
2560         case SNDRV_PCM_STATE_PREPARED:
2561         case SNDRV_PCM_STATE_SUSPENDED:
2562                 err = 0;
2563                 break;
2564         case SNDRV_PCM_STATE_XRUN:
2565                 err = -EPIPE;
2566                 break;
2567         default:
2568               __badfd:
2569                 err = -EBADFD;
2570                 break;
2571         }
2572         snd_pcm_stream_unlock_irq(substream);
2573         return err;
2574 }
2575
2576 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2577                          snd_pcm_sframes_t __user *res)
2578 {
2579         struct snd_pcm_runtime *runtime = substream->runtime;
2580         int err;
2581         snd_pcm_sframes_t n = 0;
2582
2583         snd_pcm_stream_lock_irq(substream);
2584         switch (runtime->status->state) {
2585         case SNDRV_PCM_STATE_DRAINING:
2586                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2587                         goto __badfd;
2588                 /* Fall through */
2589         case SNDRV_PCM_STATE_RUNNING:
2590                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2591                         break;
2592                 /* Fall through */
2593         case SNDRV_PCM_STATE_PREPARED:
2594         case SNDRV_PCM_STATE_SUSPENDED:
2595                 err = 0;
2596                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2597                         n = snd_pcm_playback_hw_avail(runtime);
2598                 else
2599                         n = snd_pcm_capture_avail(runtime);
2600                 n += runtime->delay;
2601                 break;
2602         case SNDRV_PCM_STATE_XRUN:
2603                 err = -EPIPE;
2604                 break;
2605         default:
2606               __badfd:
2607                 err = -EBADFD;
2608                 break;
2609         }
2610         snd_pcm_stream_unlock_irq(substream);
2611         if (!err)
2612                 if (put_user(n, res))
2613                         err = -EFAULT;
2614         return err;
2615 }
2616
2617 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2618                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2619 {
2620         struct snd_pcm_runtime *runtime = substream->runtime;
2621         struct snd_pcm_sync_ptr sync_ptr;
2622         volatile struct snd_pcm_mmap_status *status;
2623         volatile struct snd_pcm_mmap_control *control;
2624         int err;
2625
2626         memset(&sync_ptr, 0, sizeof(sync_ptr));
2627         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2628                 return -EFAULT;
2629         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2630                 return -EFAULT;
2631         status = runtime->status;
2632         control = runtime->control;
2633         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2634                 err = snd_pcm_hwsync(substream);
2635                 if (err < 0)
2636                         return err;
2637         }
2638         snd_pcm_stream_lock_irq(substream);
2639         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2640                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2641         else
2642                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2643         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2644                 control->avail_min = sync_ptr.c.control.avail_min;
2645         else
2646                 sync_ptr.c.control.avail_min = control->avail_min;
2647         sync_ptr.s.status.state = status->state;
2648         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2649         sync_ptr.s.status.tstamp = status->tstamp;
2650         sync_ptr.s.status.suspended_state = status->suspended_state;
2651         snd_pcm_stream_unlock_irq(substream);
2652         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2653                 return -EFAULT;
2654         return 0;
2655 }
2656
2657 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2658 {
2659         struct snd_pcm_runtime *runtime = substream->runtime;
2660         int arg;
2661
2662         if (get_user(arg, _arg))
2663                 return -EFAULT;
2664         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2665                 return -EINVAL;
2666         runtime->tstamp_type = arg;
2667         return 0;
2668 }
2669
2670 static int snd_pcm_common_ioctl1(struct file *file,
2671                                  struct snd_pcm_substream *substream,
2672                                  unsigned int cmd, void __user *arg)
2673 {
2674         switch (cmd) {
2675         case SNDRV_PCM_IOCTL_PVERSION:
2676                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2677         case SNDRV_PCM_IOCTL_INFO:
2678                 return snd_pcm_info_user(substream, arg);
2679         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2680                 return 0;
2681         case SNDRV_PCM_IOCTL_TTSTAMP:
2682                 return snd_pcm_tstamp(substream, arg);
2683         case SNDRV_PCM_IOCTL_HW_REFINE:
2684                 return snd_pcm_hw_refine_user(substream, arg);
2685         case SNDRV_PCM_IOCTL_HW_PARAMS:
2686                 return snd_pcm_hw_params_user(substream, arg);
2687         case SNDRV_PCM_IOCTL_HW_FREE:
2688                 return snd_pcm_hw_free(substream);
2689         case SNDRV_PCM_IOCTL_SW_PARAMS:
2690                 return snd_pcm_sw_params_user(substream, arg);
2691         case SNDRV_PCM_IOCTL_STATUS:
2692                 return snd_pcm_status_user(substream, arg);
2693         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2694                 return snd_pcm_channel_info_user(substream, arg);
2695         case SNDRV_PCM_IOCTL_PREPARE:
2696                 return snd_pcm_prepare(substream, file);
2697         case SNDRV_PCM_IOCTL_RESET:
2698                 return snd_pcm_reset(substream);
2699         case SNDRV_PCM_IOCTL_START:
2700                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2701         case SNDRV_PCM_IOCTL_LINK:
2702                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2703         case SNDRV_PCM_IOCTL_UNLINK:
2704                 return snd_pcm_unlink(substream);
2705         case SNDRV_PCM_IOCTL_RESUME:
2706                 return snd_pcm_resume(substream);
2707         case SNDRV_PCM_IOCTL_XRUN:
2708                 return snd_pcm_xrun(substream);
2709         case SNDRV_PCM_IOCTL_HWSYNC:
2710                 return snd_pcm_hwsync(substream);
2711         case SNDRV_PCM_IOCTL_DELAY:
2712                 return snd_pcm_delay(substream, arg);
2713         case SNDRV_PCM_IOCTL_SYNC_PTR:
2714                 return snd_pcm_sync_ptr(substream, arg);
2715 #ifdef CONFIG_SND_SUPPORT_OLD_API
2716         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2717                 return snd_pcm_hw_refine_old_user(substream, arg);
2718         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2719                 return snd_pcm_hw_params_old_user(substream, arg);
2720 #endif
2721         case SNDRV_PCM_IOCTL_DRAIN:
2722                 return snd_pcm_drain(substream, file);
2723         case SNDRV_PCM_IOCTL_DROP:
2724                 return snd_pcm_drop(substream);
2725         case SNDRV_PCM_IOCTL_PAUSE:
2726         {
2727                 int res;
2728                 snd_pcm_stream_lock_irq(substream);
2729                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2730                 snd_pcm_stream_unlock_irq(substream);
2731                 return res;
2732         }
2733         }
2734         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2735         return -ENOTTY;
2736 }
2737
2738 static int snd_pcm_playback_ioctl1(struct file *file,
2739                                    struct snd_pcm_substream *substream,
2740                                    unsigned int cmd, void __user *arg)
2741 {
2742         if (snd_BUG_ON(!substream))
2743                 return -ENXIO;
2744         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2745                 return -EINVAL;
2746         switch (cmd) {
2747         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2748         {
2749                 struct snd_xferi xferi;
2750                 struct snd_xferi __user *_xferi = arg;
2751                 struct snd_pcm_runtime *runtime = substream->runtime;
2752                 snd_pcm_sframes_t result;
2753                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2754                         return -EBADFD;
2755                 if (put_user(0, &_xferi->result))
2756                         return -EFAULT;
2757                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2758                         return -EFAULT;
2759                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2760                 __put_user(result, &_xferi->result);
2761                 return result < 0 ? result : 0;
2762         }
2763         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2764         {
2765                 struct snd_xfern xfern;
2766                 struct snd_xfern __user *_xfern = arg;
2767                 struct snd_pcm_runtime *runtime = substream->runtime;
2768                 void __user **bufs;
2769                 snd_pcm_sframes_t result;
2770                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2771                         return -EBADFD;
2772                 if (runtime->channels > 128)
2773                         return -EINVAL;
2774                 if (put_user(0, &_xfern->result))
2775                         return -EFAULT;
2776                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2777                         return -EFAULT;
2778
2779                 bufs = memdup_user(xfern.bufs,
2780                                    sizeof(void *) * runtime->channels);
2781                 if (IS_ERR(bufs))
2782                         return PTR_ERR(bufs);
2783                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2784                 kfree(bufs);
2785                 __put_user(result, &_xfern->result);
2786                 return result < 0 ? result : 0;
2787         }
2788         case SNDRV_PCM_IOCTL_REWIND:
2789         {
2790                 snd_pcm_uframes_t frames;
2791                 snd_pcm_uframes_t __user *_frames = arg;
2792                 snd_pcm_sframes_t result;
2793                 if (get_user(frames, _frames))
2794                         return -EFAULT;
2795                 if (put_user(0, _frames))
2796                         return -EFAULT;
2797                 result = snd_pcm_playback_rewind(substream, frames);
2798                 __put_user(result, _frames);
2799                 return result < 0 ? result : 0;
2800         }
2801         case SNDRV_PCM_IOCTL_FORWARD:
2802         {
2803                 snd_pcm_uframes_t frames;
2804                 snd_pcm_uframes_t __user *_frames = arg;
2805                 snd_pcm_sframes_t result;
2806                 if (get_user(frames, _frames))
2807                         return -EFAULT;
2808                 if (put_user(0, _frames))
2809                         return -EFAULT;
2810                 result = snd_pcm_playback_forward(substream, frames);
2811                 __put_user(result, _frames);
2812                 return result < 0 ? result : 0;
2813         }
2814         }
2815         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2816 }
2817
2818 static int snd_pcm_capture_ioctl1(struct file *file,
2819                                   struct snd_pcm_substream *substream,
2820                                   unsigned int cmd, void __user *arg)
2821 {
2822         if (snd_BUG_ON(!substream))
2823                 return -ENXIO;
2824         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2825                 return -EINVAL;
2826         switch (cmd) {
2827         case SNDRV_PCM_IOCTL_READI_FRAMES:
2828         {
2829                 struct snd_xferi xferi;
2830                 struct snd_xferi __user *_xferi = arg;
2831                 struct snd_pcm_runtime *runtime = substream->runtime;
2832                 snd_pcm_sframes_t result;
2833                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2834                         return -EBADFD;
2835                 if (put_user(0, &_xferi->result))
2836                         return -EFAULT;
2837                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2838                         return -EFAULT;
2839                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2840                 __put_user(result, &_xferi->result);
2841                 return result < 0 ? result : 0;
2842         }
2843         case SNDRV_PCM_IOCTL_READN_FRAMES:
2844         {
2845                 struct snd_xfern xfern;
2846                 struct snd_xfern __user *_xfern = arg;
2847                 struct snd_pcm_runtime *runtime = substream->runtime;
2848                 void *bufs;
2849                 snd_pcm_sframes_t result;
2850                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2851                         return -EBADFD;
2852                 if (runtime->channels > 128)
2853                         return -EINVAL;
2854                 if (put_user(0, &_xfern->result))
2855                         return -EFAULT;
2856                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2857                         return -EFAULT;
2858
2859                 bufs = memdup_user(xfern.bufs,
2860                                    sizeof(void *) * runtime->channels);
2861                 if (IS_ERR(bufs))
2862                         return PTR_ERR(bufs);
2863                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2864                 kfree(bufs);
2865                 __put_user(result, &_xfern->result);
2866                 return result < 0 ? result : 0;
2867         }
2868         case SNDRV_PCM_IOCTL_REWIND:
2869         {
2870                 snd_pcm_uframes_t frames;
2871                 snd_pcm_uframes_t __user *_frames = arg;
2872                 snd_pcm_sframes_t result;
2873                 if (get_user(frames, _frames))
2874                         return -EFAULT;
2875                 if (put_user(0, _frames))
2876                         return -EFAULT;
2877                 result = snd_pcm_capture_rewind(substream, frames);
2878                 __put_user(result, _frames);
2879                 return result < 0 ? result : 0;
2880         }
2881         case SNDRV_PCM_IOCTL_FORWARD:
2882         {
2883                 snd_pcm_uframes_t frames;
2884                 snd_pcm_uframes_t __user *_frames = arg;
2885                 snd_pcm_sframes_t result;
2886                 if (get_user(frames, _frames))
2887                         return -EFAULT;
2888                 if (put_user(0, _frames))
2889                         return -EFAULT;
2890                 result = snd_pcm_capture_forward(substream, frames);
2891                 __put_user(result, _frames);
2892                 return result < 0 ? result : 0;
2893         }
2894         }
2895         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2896 }
2897
2898 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2899                                    unsigned long arg)
2900 {
2901         struct snd_pcm_file *pcm_file;
2902
2903         pcm_file = file->private_data;
2904
2905         if (((cmd >> 8) & 0xff) != 'A')
2906                 return -ENOTTY;
2907
2908         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2909                                        (void __user *)arg);
2910 }
2911
2912 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2913                                   unsigned long arg)
2914 {
2915         struct snd_pcm_file *pcm_file;
2916
2917         pcm_file = file->private_data;
2918
2919         if (((cmd >> 8) & 0xff) != 'A')
2920                 return -ENOTTY;
2921
2922         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2923                                       (void __user *)arg);
2924 }
2925
2926 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2927                          unsigned int cmd, void *arg)
2928 {
2929         mm_segment_t fs;
2930         int result;
2931
2932         fs = snd_enter_user();
2933         switch (substream->stream) {
2934         case SNDRV_PCM_STREAM_PLAYBACK:
2935                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2936                                                  (void __user *)arg);
2937                 break;
2938         case SNDRV_PCM_STREAM_CAPTURE:
2939                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2940                                                 (void __user *)arg);
2941                 break;
2942         default:
2943                 result = -EINVAL;
2944                 break;
2945         }
2946         snd_leave_user(fs);
2947         return result;
2948 }
2949
2950 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2951
2952 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2953                             loff_t * offset)
2954 {
2955         struct snd_pcm_file *pcm_file;
2956         struct snd_pcm_substream *substream;
2957         struct snd_pcm_runtime *runtime;
2958         snd_pcm_sframes_t result;
2959
2960         pcm_file = file->private_data;
2961         substream = pcm_file->substream;
2962         if (PCM_RUNTIME_CHECK(substream))
2963                 return -ENXIO;
2964         runtime = substream->runtime;
2965         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2966                 return -EBADFD;
2967         if (!frame_aligned(runtime, count))
2968                 return -EINVAL;
2969         count = bytes_to_frames(runtime, count);
2970         result = snd_pcm_lib_read(substream, buf, count);
2971         if (result > 0)
2972                 result = frames_to_bytes(runtime, result);
2973         return result;
2974 }
2975
2976 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2977                              size_t count, loff_t * offset)
2978 {
2979         struct snd_pcm_file *pcm_file;
2980         struct snd_pcm_substream *substream;
2981         struct snd_pcm_runtime *runtime;
2982         snd_pcm_sframes_t result;
2983
2984         pcm_file = file->private_data;
2985         substream = pcm_file->substream;
2986         if (PCM_RUNTIME_CHECK(substream))
2987                 return -ENXIO;
2988         runtime = substream->runtime;
2989         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2990                 return -EBADFD;
2991         if (!frame_aligned(runtime, count))
2992                 return -EINVAL;
2993         count = bytes_to_frames(runtime, count);
2994         result = snd_pcm_lib_write(substream, buf, count);
2995         if (result > 0)
2996                 result = frames_to_bytes(runtime, result);
2997         return result;
2998 }
2999
3000 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3001                              unsigned long nr_segs, loff_t pos)
3002
3003 {
3004         struct snd_pcm_file *pcm_file;
3005         struct snd_pcm_substream *substream;
3006         struct snd_pcm_runtime *runtime;
3007         snd_pcm_sframes_t result;
3008         unsigned long i;
3009         void __user **bufs;
3010         snd_pcm_uframes_t frames;
3011
3012         pcm_file = iocb->ki_filp->private_data;
3013         substream = pcm_file->substream;
3014         if (PCM_RUNTIME_CHECK(substream))
3015                 return -ENXIO;
3016         runtime = substream->runtime;
3017         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3018                 return -EBADFD;
3019         if (nr_segs > 1024 || nr_segs != runtime->channels)
3020                 return -EINVAL;
3021         if (!frame_aligned(runtime, iov->iov_len))
3022                 return -EINVAL;
3023         frames = bytes_to_samples(runtime, iov->iov_len);
3024         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3025         if (bufs == NULL)
3026                 return -ENOMEM;
3027         for (i = 0; i < nr_segs; ++i)
3028                 bufs[i] = iov[i].iov_base;
3029         result = snd_pcm_lib_readv(substream, bufs, frames);
3030         if (result > 0)
3031                 result = frames_to_bytes(runtime, result);
3032         kfree(bufs);
3033         return result;
3034 }
3035
3036 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3037                               unsigned long nr_segs, loff_t pos)
3038 {
3039         struct snd_pcm_file *pcm_file;
3040         struct snd_pcm_substream *substream;
3041         struct snd_pcm_runtime *runtime;
3042         snd_pcm_sframes_t result;
3043         unsigned long i;
3044         void __user **bufs;
3045         snd_pcm_uframes_t frames;
3046
3047         pcm_file = iocb->ki_filp->private_data;
3048         substream = pcm_file->substream;
3049         if (PCM_RUNTIME_CHECK(substream))
3050                 return -ENXIO;
3051         runtime = substream->runtime;
3052         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3053                 return -EBADFD;
3054         if (nr_segs > 128 || nr_segs != runtime->channels ||
3055             !frame_aligned(runtime, iov->iov_len))
3056                 return -EINVAL;
3057         frames = bytes_to_samples(runtime, iov->iov_len);
3058         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3059         if (bufs == NULL)
3060                 return -ENOMEM;
3061         for (i = 0; i < nr_segs; ++i)
3062                 bufs[i] = iov[i].iov_base;
3063         result = snd_pcm_lib_writev(substream, bufs, frames);
3064         if (result > 0)
3065                 result = frames_to_bytes(runtime, result);
3066         kfree(bufs);
3067         return result;
3068 }
3069
3070 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3071 {
3072         struct snd_pcm_file *pcm_file;
3073         struct snd_pcm_substream *substream;
3074         struct snd_pcm_runtime *runtime;
3075         unsigned int mask;
3076         snd_pcm_uframes_t avail;
3077
3078         pcm_file = file->private_data;
3079
3080         substream = pcm_file->substream;
3081         if (PCM_RUNTIME_CHECK(substream))
3082                 return -ENXIO;
3083         runtime = substream->runtime;
3084
3085         poll_wait(file, &runtime->sleep, wait);
3086
3087         snd_pcm_stream_lock_irq(substream);
3088         avail = snd_pcm_playback_avail(runtime);
3089         switch (runtime->status->state) {
3090         case SNDRV_PCM_STATE_RUNNING:
3091         case SNDRV_PCM_STATE_PREPARED:
3092         case SNDRV_PCM_STATE_PAUSED:
3093                 if (avail >= runtime->control->avail_min) {
3094                         mask = POLLOUT | POLLWRNORM;
3095                         break;
3096                 }
3097                 /* Fall through */
3098         case SNDRV_PCM_STATE_DRAINING:
3099                 mask = 0;
3100                 break;
3101         default:
3102                 mask = POLLOUT | POLLWRNORM | POLLERR;
3103                 break;
3104         }
3105         snd_pcm_stream_unlock_irq(substream);
3106         return mask;
3107 }
3108
3109 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3110 {
3111         struct snd_pcm_file *pcm_file;
3112         struct snd_pcm_substream *substream;
3113         struct snd_pcm_runtime *runtime;
3114         unsigned int mask;
3115         snd_pcm_uframes_t avail;
3116
3117         pcm_file = file->private_data;
3118
3119         substream = pcm_file->substream;
3120         if (PCM_RUNTIME_CHECK(substream))
3121                 return -ENXIO;
3122         runtime = substream->runtime;
3123
3124         poll_wait(file, &runtime->sleep, wait);
3125
3126         snd_pcm_stream_lock_irq(substream);
3127         avail = snd_pcm_capture_avail(runtime);
3128         switch (runtime->status->state) {
3129         case SNDRV_PCM_STATE_RUNNING:
3130         case SNDRV_PCM_STATE_PREPARED:
3131         case SNDRV_PCM_STATE_PAUSED:
3132                 if (avail >= runtime->control->avail_min) {
3133                         mask = POLLIN | POLLRDNORM;
3134                         break;
3135                 }
3136                 mask = 0;
3137                 break;
3138         case SNDRV_PCM_STATE_DRAINING:
3139                 if (avail > 0) {
3140                         mask = POLLIN | POLLRDNORM;
3141                         break;
3142                 }
3143                 /* Fall through */
3144         default:
3145                 mask = POLLIN | POLLRDNORM | POLLERR;
3146                 break;
3147         }
3148         snd_pcm_stream_unlock_irq(substream);
3149         return mask;
3150 }
3151
3152 /*
3153  * mmap support
3154  */
3155
3156 /*
3157  * Only on coherent architectures, we can mmap the status and the control records
3158  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3159  */
3160 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3161 /*
3162  * mmap status record
3163  */
3164 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3165                                                 struct vm_fault *vmf)
3166 {
3167         struct snd_pcm_substream *substream = area->vm_private_data;
3168         struct snd_pcm_runtime *runtime;
3169
3170         if (substream == NULL)
3171                 return VM_FAULT_SIGBUS;
3172         runtime = substream->runtime;
3173         vmf->page = virt_to_page(runtime->status);
3174         get_page(vmf->page);
3175         return 0;
3176 }
3177
3178 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3179 {
3180         .fault =        snd_pcm_mmap_status_fault,
3181 };
3182
3183 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3184                                struct vm_area_struct *area)
3185 {
3186         long size;
3187         if (!(area->vm_flags & VM_READ))
3188                 return -EINVAL;
3189         size = area->vm_end - area->vm_start;
3190         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3191                 return -EINVAL;
3192         area->vm_ops = &snd_pcm_vm_ops_status;
3193         area->vm_private_data = substream;
3194         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3195         return 0;
3196 }
3197
3198 /*
3199  * mmap control record
3200  */
3201 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3202                                                 struct vm_fault *vmf)
3203 {
3204         struct snd_pcm_substream *substream = area->vm_private_data;
3205         struct snd_pcm_runtime *runtime;
3206
3207         if (substream == NULL)
3208                 return VM_FAULT_SIGBUS;
3209         runtime = substream->runtime;
3210         vmf->page = virt_to_page(runtime->control);
3211         get_page(vmf->page);
3212         return 0;
3213 }
3214
3215 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3216 {
3217         .fault =        snd_pcm_mmap_control_fault,
3218 };
3219
3220 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3221                                 struct vm_area_struct *area)
3222 {
3223         long size;
3224         if (!(area->vm_flags & VM_READ))
3225                 return -EINVAL;
3226         size = area->vm_end - area->vm_start;
3227         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3228                 return -EINVAL;
3229         area->vm_ops = &snd_pcm_vm_ops_control;
3230         area->vm_private_data = substream;
3231         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3232         return 0;
3233 }
3234 #else /* ! coherent mmap */
3235 /*
3236  * don't support mmap for status and control records.
3237  */
3238 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3239                                struct vm_area_struct *area)
3240 {
3241         return -ENXIO;
3242 }
3243 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3244                                 struct vm_area_struct *area)
3245 {
3246         return -ENXIO;
3247 }
3248 #endif /* coherent mmap */
3249
3250 static inline struct page *
3251 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3252 {
3253         void *vaddr = substream->runtime->dma_area + ofs;
3254 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3255         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3256                 return virt_to_page(CAC_ADDR(vaddr));
3257 #endif
3258 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3259         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3260                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3261                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3262                 /* assume dma_handle set via pfn_to_phys() in
3263                  * mm/dma-noncoherent.c
3264                  */
3265                 return pfn_to_page(addr >> PAGE_SHIFT);
3266         }
3267 #endif
3268         return virt_to_page(vaddr);
3269 }
3270
3271 /*
3272  * fault callback for mmapping a RAM page
3273  */
3274 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3275                                                 struct vm_fault *vmf)
3276 {
3277         struct snd_pcm_substream *substream = area->vm_private_data;
3278         struct snd_pcm_runtime *runtime;
3279         unsigned long offset;
3280         struct page * page;
3281         size_t dma_bytes;
3282
3283         if (substream == NULL)
3284                 return VM_FAULT_SIGBUS;
3285         runtime = substream->runtime;
3286         offset = vmf->pgoff << PAGE_SHIFT;
3287         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3288         if (offset > dma_bytes - PAGE_SIZE)
3289                 return VM_FAULT_SIGBUS;
3290         if (substream->ops->page)
3291                 page = substream->ops->page(substream, offset);
3292         else
3293                 page = snd_pcm_default_page_ops(substream, offset);
3294         if (!page)
3295                 return VM_FAULT_SIGBUS;
3296         get_page(page);
3297         vmf->page = page;
3298         return 0;
3299 }
3300
3301 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3302         .open =         snd_pcm_mmap_data_open,
3303         .close =        snd_pcm_mmap_data_close,
3304 };
3305
3306 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3307         .open =         snd_pcm_mmap_data_open,
3308         .close =        snd_pcm_mmap_data_close,
3309         .fault =        snd_pcm_mmap_data_fault,
3310 };
3311
3312 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3313 /* This should be defined / handled globally! */
3314 #ifdef CONFIG_ARM
3315 #define ARCH_HAS_DMA_MMAP_COHERENT
3316 #endif
3317 #endif
3318
3319 /*
3320  * mmap the DMA buffer on RAM
3321  */
3322 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3323                              struct vm_area_struct *area)
3324 {
3325         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3326 #ifdef CONFIG_GENERIC_ALLOCATOR
3327         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3328                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3329                 return remap_pfn_range(area, area->vm_start,
3330                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3331                                 area->vm_end - area->vm_start, area->vm_page_prot);
3332         }
3333 #endif /* CONFIG_GENERIC_ALLOCATOR */
3334 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3335         if (!substream->ops->page &&
3336             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3337                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3338                                          area,
3339                                          substream->runtime->dma_area,
3340                                          substream->runtime->dma_addr,
3341                                          area->vm_end - area->vm_start);
3342 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3343         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3344             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3345                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3346 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3347         /* mmap with fault handler */
3348         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3349         return 0;
3350 }
3351 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3352
3353 /*
3354  * mmap the DMA buffer on I/O memory area
3355  */
3356 #if SNDRV_PCM_INFO_MMAP_IOMEM
3357 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3358                            struct vm_area_struct *area)
3359 {
3360         struct snd_pcm_runtime *runtime = substream->runtime;;
3361
3362         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3363         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3364 }
3365
3366 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3367 #endif /* SNDRV_PCM_INFO_MMAP */
3368
3369 /*
3370  * mmap DMA buffer
3371  */
3372 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3373                       struct vm_area_struct *area)
3374 {
3375         struct snd_pcm_runtime *runtime;
3376         long size;
3377         unsigned long offset;
3378         size_t dma_bytes;
3379         int err;
3380
3381         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3382                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3383                         return -EINVAL;
3384         } else {
3385                 if (!(area->vm_flags & VM_READ))
3386                         return -EINVAL;
3387         }
3388         runtime = substream->runtime;
3389         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3390                 return -EBADFD;
3391         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3392                 return -ENXIO;
3393         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3394             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3395                 return -EINVAL;
3396         size = area->vm_end - area->vm_start;
3397         offset = area->vm_pgoff << PAGE_SHIFT;
3398         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3399         if ((size_t)size > dma_bytes)
3400                 return -EINVAL;
3401         if (offset > dma_bytes - size)
3402                 return -EINVAL;
3403
3404         area->vm_ops = &snd_pcm_vm_ops_data;
3405         area->vm_private_data = substream;
3406         if (substream->ops->mmap)
3407                 err = substream->ops->mmap(substream, area);
3408         else
3409                 err = snd_pcm_lib_default_mmap(substream, area);
3410         if (!err)
3411                 atomic_inc(&substream->mmap_count);
3412         return err;
3413 }
3414
3415 EXPORT_SYMBOL(snd_pcm_mmap_data);
3416
3417 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3418 {
3419         struct snd_pcm_file * pcm_file;
3420         struct snd_pcm_substream *substream;
3421         unsigned long offset;
3422
3423         pcm_file = file->private_data;
3424         substream = pcm_file->substream;
3425         if (PCM_RUNTIME_CHECK(substream))
3426                 return -ENXIO;
3427
3428         offset = area->vm_pgoff << PAGE_SHIFT;
3429         switch (offset) {
3430         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3431                 if (pcm_file->no_compat_mmap)
3432                         return -ENXIO;
3433                 return snd_pcm_mmap_status(substream, file, area);
3434         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3435                 if (pcm_file->no_compat_mmap)
3436                         return -ENXIO;
3437                 return snd_pcm_mmap_control(substream, file, area);
3438         default:
3439                 return snd_pcm_mmap_data(substream, file, area);
3440         }
3441         return 0;
3442 }
3443
3444 static int snd_pcm_fasync(int fd, struct file * file, int on)
3445 {
3446         struct snd_pcm_file * pcm_file;
3447         struct snd_pcm_substream *substream;
3448         struct snd_pcm_runtime *runtime;
3449
3450         pcm_file = file->private_data;
3451         substream = pcm_file->substream;
3452         if (PCM_RUNTIME_CHECK(substream))
3453                 return -ENXIO;
3454         runtime = substream->runtime;
3455         return fasync_helper(fd, file, on, &runtime->fasync);
3456 }
3457
3458 /*
3459  * ioctl32 compat
3460  */
3461 #ifdef CONFIG_COMPAT
3462 #include "pcm_compat.c"
3463 #else
3464 #define snd_pcm_ioctl_compat    NULL
3465 #endif
3466
3467 /*
3468  *  To be removed helpers to keep binary compatibility
3469  */
3470
3471 #ifdef CONFIG_SND_SUPPORT_OLD_API
3472 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3473 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3474
3475 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3476                                                struct snd_pcm_hw_params_old *oparams)
3477 {
3478         unsigned int i;
3479
3480         memset(params, 0, sizeof(*params));
3481         params->flags = oparams->flags;
3482         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3483                 params->masks[i].bits[0] = oparams->masks[i];
3484         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3485         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3486         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3487         params->info = oparams->info;
3488         params->msbits = oparams->msbits;
3489         params->rate_num = oparams->rate_num;
3490         params->rate_den = oparams->rate_den;
3491         params->fifo_size = oparams->fifo_size;
3492 }
3493
3494 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3495                                              struct snd_pcm_hw_params *params)
3496 {
3497         unsigned int i;
3498
3499         memset(oparams, 0, sizeof(*oparams));
3500         oparams->flags = params->flags;
3501         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3502                 oparams->masks[i] = params->masks[i].bits[0];
3503         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3504         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3505         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3506         oparams->info = params->info;
3507         oparams->msbits = params->msbits;
3508         oparams->rate_num = params->rate_num;
3509         oparams->rate_den = params->rate_den;
3510         oparams->fifo_size = params->fifo_size;
3511 }
3512
3513 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3514                                       struct snd_pcm_hw_params_old __user * _oparams)
3515 {
3516         struct snd_pcm_hw_params *params;
3517         struct snd_pcm_hw_params_old *oparams = NULL;
3518         int err;
3519
3520         params = kmalloc(sizeof(*params), GFP_KERNEL);
3521         if (!params)
3522                 return -ENOMEM;
3523
3524         oparams = memdup_user(_oparams, sizeof(*oparams));
3525         if (IS_ERR(oparams)) {
3526                 err = PTR_ERR(oparams);
3527                 goto out;
3528         }
3529         snd_pcm_hw_convert_from_old_params(params, oparams);
3530         err = snd_pcm_hw_refine(substream, params);
3531         snd_pcm_hw_convert_to_old_params(oparams, params);
3532         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3533                 if (!err)
3534                         err = -EFAULT;
3535         }
3536
3537         kfree(oparams);
3538 out:
3539         kfree(params);
3540         return err;
3541 }
3542
3543 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3544                                       struct snd_pcm_hw_params_old __user * _oparams)
3545 {
3546         struct snd_pcm_hw_params *params;
3547         struct snd_pcm_hw_params_old *oparams = NULL;
3548         int err;
3549
3550         params = kmalloc(sizeof(*params), GFP_KERNEL);
3551         if (!params)
3552                 return -ENOMEM;
3553
3554         oparams = memdup_user(_oparams, sizeof(*oparams));
3555         if (IS_ERR(oparams)) {
3556                 err = PTR_ERR(oparams);
3557                 goto out;
3558         }
3559         snd_pcm_hw_convert_from_old_params(params, oparams);
3560         err = snd_pcm_hw_params(substream, params);
3561         snd_pcm_hw_convert_to_old_params(oparams, params);
3562         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3563                 if (!err)
3564                         err = -EFAULT;
3565         }
3566
3567         kfree(oparams);
3568 out:
3569         kfree(params);
3570         return err;
3571 }
3572 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3573
3574 #ifndef CONFIG_MMU
3575 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3576                                                unsigned long addr,
3577                                                unsigned long len,
3578                                                unsigned long pgoff,
3579                                                unsigned long flags)
3580 {
3581         struct snd_pcm_file *pcm_file = file->private_data;
3582         struct snd_pcm_substream *substream = pcm_file->substream;
3583         struct snd_pcm_runtime *runtime = substream->runtime;
3584         unsigned long offset = pgoff << PAGE_SHIFT;
3585
3586         switch (offset) {
3587         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3588                 return (unsigned long)runtime->status;
3589         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3590                 return (unsigned long)runtime->control;
3591         default:
3592                 return (unsigned long)runtime->dma_area + offset;
3593         }
3594 }
3595 #else
3596 # define snd_pcm_get_unmapped_area NULL
3597 #endif
3598
3599 /*
3600  *  Register section
3601  */
3602
3603 const struct file_operations snd_pcm_f_ops[2] = {
3604         {
3605                 .owner =                THIS_MODULE,
3606                 .write =                snd_pcm_write,
3607                 .aio_write =            snd_pcm_aio_write,
3608                 .open =                 snd_pcm_playback_open,
3609                 .release =              snd_pcm_release,
3610                 .llseek =               no_llseek,
3611                 .poll =                 snd_pcm_playback_poll,
3612                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3613                 .compat_ioctl =         snd_pcm_ioctl_compat,
3614                 .mmap =                 snd_pcm_mmap,
3615                 .fasync =               snd_pcm_fasync,
3616                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3617         },
3618         {
3619                 .owner =                THIS_MODULE,
3620                 .read =                 snd_pcm_read,
3621                 .aio_read =             snd_pcm_aio_read,
3622                 .open =                 snd_pcm_capture_open,
3623                 .release =              snd_pcm_release,
3624                 .llseek =               no_llseek,
3625                 .poll =                 snd_pcm_capture_poll,
3626                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3627                 .compat_ioctl =         snd_pcm_ioctl_compat,
3628                 .mmap =                 snd_pcm_mmap,
3629                 .fasync =               snd_pcm_fasync,
3630                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3631         }
3632 };