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
  39 /*
  40  *  Compatibility
  41  */
  42
  43 struct snd_pcm_hw_params_old {
  44         unsigned int flags;
  45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  49         unsigned int rmask;
  50         unsigned int cmask;
  51         unsigned int info;
  52         unsigned int msbits;
  53         unsigned int rate_num;
  54         unsigned int rate_den;
  55         snd_pcm_uframes_t fifo_size;
  56         unsigned char reserved[64];
  57 };
  58
  59 #ifdef CONFIG_SND_SUPPORT_OLD_API
  60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  62
  63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  64                                       struct snd_pcm_hw_params_old __user * _oparams);
  65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 #endif
  68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  69
  70 /*
  71  *
  72  */
  73
  74 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
  75 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  76
  77 /**
  78  * snd_pcm_stream_lock - Lock the PCM stream
  79  * @substream: PCM substream
  80  *
  81  * This locks the PCM stream's spinlock or mutex depending on the nonatomic
  82  * flag of the given substream.  This also takes the global link rw lock
  83  * (or rw sem), too, for avoiding the race with linked streams.
  84  */
  85 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
  86 {
  87         if (substream->pcm->nonatomic) {
  88                 down_read(&snd_pcm_link_rwsem);
  89                 mutex_lock(&substream->self_group.mutex);
  90         } else {
  91                 read_lock(&snd_pcm_link_rwlock);
  92                 spin_lock(&substream->self_group.lock);
  93         }
  94 }
  95 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
  96
  97 /**
  98  * snd_pcm_stream_lock - Unlock the PCM stream
  99  * @substream: PCM substream
 100  *
 101  * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
 102  */
 103 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
 104 {
 105         if (substream->pcm->nonatomic) {
 106                 mutex_unlock(&substream->self_group.mutex);
 107                 up_read(&snd_pcm_link_rwsem);
 108         } else {
 109                 spin_unlock(&substream->self_group.lock);
 110                 read_unlock(&snd_pcm_link_rwlock);
 111         }
 112 }
 113 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
 114
 115 /**
 116  * snd_pcm_stream_lock_irq - Lock the PCM stream
 117  * @substream: PCM substream
 118  *
 119  * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
 120  * IRQ (only when nonatomic is false).  In nonatomic case, this is identical
 121  * as snd_pcm_stream_lock().
 122  */
 123 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
 124 {
 125         if (!substream->pcm->nonatomic)
 126                 local_irq_disable();
 127         snd_pcm_stream_lock(substream);
 128 }
 129 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
 130
 131 /**
 132  * snd_pcm_stream_unlock_irq - Unlock the PCM stream
 133  * @substream: PCM substream
 134  *
 135  * This is a counter-part of snd_pcm_stream_lock_irq().
 136  */
 137 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
 138 {
 139         snd_pcm_stream_unlock(substream);
 140         if (!substream->pcm->nonatomic)
 141                 local_irq_enable();
 142 }
 143 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
 144
 145 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
 146 {
 147         unsigned long flags = 0;
 148         if (!substream->pcm->nonatomic)
 149                 local_irq_save(flags);
 150         snd_pcm_stream_lock(substream);
 151         return flags;
 152 }
 153 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
 154
 155 /**
 156  * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
 157  * @substream: PCM substream
 158  * @flags: irq flags
 159  *
 160  * This is a counter-part of snd_pcm_stream_lock_irqsave().
 161  */
 162 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
 163                                       unsigned long flags)
 164 {
 165         snd_pcm_stream_unlock(substream);
 166         if (!substream->pcm->nonatomic)
 167                 local_irq_restore(flags);
 168 }
 169 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
 170
 171 static inline mm_segment_t snd_enter_user(void)
 172 {
 173         mm_segment_t fs = get_fs();
 174         set_fs(get_ds());
 175         return fs;
 176 }
 177
 178 static inline void snd_leave_user(mm_segment_t fs)
 179 {
 180         set_fs(fs);
 181 }
 182
 183
 184
 185 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 186 {
 187         struct snd_pcm_runtime *runtime;
 188         struct snd_pcm *pcm = substream->pcm;
 189         struct snd_pcm_str *pstr = substream->pstr;
 190
 191         memset(info, 0, sizeof(*info));
 192         info->card = pcm->card->number;
 193         info->device = pcm->device;
 194         info->stream = substream->stream;
 195         info->subdevice = substream->number;
 196         strlcpy(info->id, pcm->id, sizeof(info->id));
 197         strlcpy(info->name, pcm->name, sizeof(info->name));
 198         info->dev_class = pcm->dev_class;
 199         info->dev_subclass = pcm->dev_subclass;
 200         info->subdevices_count = pstr->substream_count;
 201         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 202         strlcpy(info->subname, substream->name, sizeof(info->subname));
 203         runtime = substream->runtime;
 204         /* AB: FIXME!!! This is definitely nonsense */
 205         if (runtime) {
 206                 info->sync = runtime->sync;
 207                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 208         }
 209         return 0;
 210 }
 211
 212 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 213                       struct snd_pcm_info __user * _info)
 214 {
 215         struct snd_pcm_info *info;
 216         int err;
 217
 218         info = kmalloc(sizeof(*info), GFP_KERNEL);
 219         if (! info)
 220                 return -ENOMEM;
 221         err = snd_pcm_info(substream, info);
 222         if (err >= 0) {
 223                 if (copy_to_user(_info, info, sizeof(*info)))
 224                         err = -EFAULT;
 225         }
 226         kfree(info);
 227         return err;
 228 }
 229
 230 static bool hw_support_mmap(struct snd_pcm_substream *substream)
 231 {
 232         if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
 233                 return false;
 234         /* check architectures that return -EINVAL from dma_mmap_coherent() */
 235         /* FIXME: this should be some global flag */
 236 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
 237         defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
 238         if (!substream->ops->mmap &&
 239             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
 240                 return false;
 241 #endif
 242         return true;
 243 }
 244
 245 #undef RULES_DEBUG
 246
 247 #ifdef RULES_DEBUG
 248 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 249 static const char * const snd_pcm_hw_param_names[] = {
 250         HW_PARAM(ACCESS),
 251         HW_PARAM(FORMAT),
 252         HW_PARAM(SUBFORMAT),
 253         HW_PARAM(SAMPLE_BITS),
 254         HW_PARAM(FRAME_BITS),
 255         HW_PARAM(CHANNELS),
 256         HW_PARAM(RATE),
 257         HW_PARAM(PERIOD_TIME),
 258         HW_PARAM(PERIOD_SIZE),
 259         HW_PARAM(PERIOD_BYTES),
 260         HW_PARAM(PERIODS),
 261         HW_PARAM(BUFFER_TIME),
 262         HW_PARAM(BUFFER_SIZE),
 263         HW_PARAM(BUFFER_BYTES),
 264         HW_PARAM(TICK_TIME),
 265 };
 266 #endif
 267
 268 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 269                       struct snd_pcm_hw_params *params)
 270 {
 271         unsigned int k;
 272         struct snd_pcm_hardware *hw;
 273         struct snd_interval *i = NULL;
 274         struct snd_mask *m = NULL;
 275         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 276         unsigned int rstamps[constrs->rules_num];
 277         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 278         unsigned int stamp = 2;
 279         int changed, again;
 280
 281         params->info = 0;
 282         params->fifo_size = 0;
 283         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 284                 params->msbits = 0;
 285         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 286                 params->rate_num = 0;
 287                 params->rate_den = 0;
 288         }
 289
 290         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 291                 m = hw_param_mask(params, k);
 292                 if (snd_mask_empty(m))
 293                         return -EINVAL;
 294                 if (!(params->rmask & (1 << k)))
 295                         continue;
 296 #ifdef RULES_DEBUG
 297                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 298                 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 299 #endif
 300                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 301 #ifdef RULES_DEBUG
 302                 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 303 #endif
 304                 if (changed)
 305                         params->cmask |= 1 << k;
 306                 if (changed < 0)
 307                         return changed;
 308         }
 309
 310         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 311                 i = hw_param_interval(params, k);
 312                 if (snd_interval_empty(i))
 313                         return -EINVAL;
 314                 if (!(params->rmask & (1 << k)))
 315                         continue;
 316 #ifdef RULES_DEBUG
 317                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 318                 if (i->empty)
 319                         pr_cont("empty");
 320                 else
 321                         pr_cont("%c%u %u%c",
 322                                i->openmin ? '(' : '[', i->min,
 323                                i->max, i->openmax ? ')' : ']');
 324                 pr_cont(" -> ");
 325 #endif
 326                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 327 #ifdef RULES_DEBUG
 328                 if (i->empty)
 329                         pr_cont("empty\n");
 330                 else
 331                         pr_cont("%c%u %u%c\n",
 332                                i->openmin ? '(' : '[', i->min,
 333                                i->max, i->openmax ? ')' : ']');
 334 #endif
 335                 if (changed)
 336                         params->cmask |= 1 << k;
 337                 if (changed < 0)
 338                         return changed;
 339         }
 340
 341         for (k = 0; k < constrs->rules_num; k++)
 342                 rstamps[k] = 0;
 343         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 344                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 345         do {
 346                 again = 0;
 347                 for (k = 0; k < constrs->rules_num; k++) {
 348                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 349                         unsigned int d;
 350                         int doit = 0;
 351                         if (r->cond && !(r->cond & params->flags))
 352                                 continue;
 353                         for (d = 0; r->deps[d] >= 0; d++) {
 354                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 355                                         doit = 1;
 356                                         break;
 357                                 }
 358                         }
 359                         if (!doit)
 360                                 continue;
 361 #ifdef RULES_DEBUG
 362                         pr_debug("Rule %d [%p]: ", k, r->func);
 363                         if (r->var >= 0) {
 364                                 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
 365                                 if (hw_is_mask(r->var)) {
 366                                         m = hw_param_mask(params, r->var);
 367                                         pr_cont("%x", *m->bits);
 368                                 } else {
 369                                         i = hw_param_interval(params, r->var);
 370                                         if (i->empty)
 371                                                 pr_cont("empty");
 372                                         else
 373                                                 pr_cont("%c%u %u%c",
 374                                                        i->openmin ? '(' : '[', i->min,
 375                                                        i->max, i->openmax ? ')' : ']');
 376                                 }
 377                         }
 378 #endif
 379                         changed = r->func(params, r);
 380 #ifdef RULES_DEBUG
 381                         if (r->var >= 0) {
 382                                 pr_cont(" -> ");
 383                                 if (hw_is_mask(r->var))
 384                                         pr_cont("%x", *m->bits);
 385                                 else {
 386                                         if (i->empty)
 387                                                 pr_cont("empty");
 388                                         else
 389                                                 pr_cont("%c%u %u%c",
 390                                                        i->openmin ? '(' : '[', i->min,
 391                                                        i->max, i->openmax ? ')' : ']');
 392                                 }
 393                         }
 394                         pr_cont("\n");
 395 #endif
 396                         rstamps[k] = stamp;
 397                         if (changed && r->var >= 0) {
 398                                 params->cmask |= (1 << r->var);
 399                                 vstamps[r->var] = stamp;
 400                                 again = 1;
 401                         }
 402                         if (changed < 0)
 403                                 return changed;
 404                         stamp++;
 405                 }
 406         } while (again);
 407         if (!params->msbits) {
 408                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 409                 if (snd_interval_single(i))
 410                         params->msbits = snd_interval_value(i);
 411         }
 412
 413         if (!params->rate_den) {
 414                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 415                 if (snd_interval_single(i)) {
 416                         params->rate_num = snd_interval_value(i);
 417                         params->rate_den = 1;
 418                 }
 419         }
 420
 421         hw = &substream->runtime->hw;
 422         if (!params->info) {
 423                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 424                 if (!hw_support_mmap(substream))
 425                         params->info &= ~(SNDRV_PCM_INFO_MMAP |
 426                                           SNDRV_PCM_INFO_MMAP_VALID);
 427         }
 428         if (!params->fifo_size) {
 429                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 430                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 431                 if (snd_mask_min(m) == snd_mask_max(m) &&
 432                     snd_interval_min(i) == snd_interval_max(i)) {
 433                         changed = substream->ops->ioctl(substream,
 434                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 435                         if (changed < 0)
 436                                 return changed;
 437                 }
 438         }
 439         params->rmask = 0;
 440         return 0;
 441 }
 442
 443 EXPORT_SYMBOL(snd_pcm_hw_refine);
 444
 445 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 446                                   struct snd_pcm_hw_params __user * _params)
 447 {
 448         struct snd_pcm_hw_params *params;
 449         int err;
 450
 451         params = memdup_user(_params, sizeof(*params));
 452         if (IS_ERR(params))
 453                 return PTR_ERR(params);
 454
 455         err = snd_pcm_hw_refine(substream, params);
 456         if (copy_to_user(_params, params, sizeof(*params))) {
 457                 if (!err)
 458                         err = -EFAULT;
 459         }
 460
 461         kfree(params);
 462         return err;
 463 }
 464
 465 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 466 {
 467         int usecs;
 468
 469         if (! runtime->rate)
 470                 return -1; /* invalid */
 471
 472         /* take 75% of period time as the deadline */
 473         usecs = (750000 / runtime->rate) * runtime->period_size;
 474         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 475                 runtime->rate;
 476
 477         return usecs;
 478 }
 479
 480 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 481 {
 482         snd_pcm_stream_lock_irq(substream);
 483         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 484                 substream->runtime->status->state = state;
 485         snd_pcm_stream_unlock_irq(substream);
 486 }
 487
 488 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 489                              struct snd_pcm_hw_params *params)
 490 {
 491         struct snd_pcm_runtime *runtime;
 492         int err, usecs;
 493         unsigned int bits;
 494         snd_pcm_uframes_t frames;
 495
 496         if (PCM_RUNTIME_CHECK(substream))
 497                 return -ENXIO;
 498         runtime = substream->runtime;
 499         snd_pcm_stream_lock_irq(substream);
 500         switch (runtime->status->state) {
 501         case SNDRV_PCM_STATE_OPEN:
 502         case SNDRV_PCM_STATE_SETUP:
 503         case SNDRV_PCM_STATE_PREPARED:
 504                 break;
 505         default:
 506                 snd_pcm_stream_unlock_irq(substream);
 507                 return -EBADFD;
 508         }
 509         snd_pcm_stream_unlock_irq(substream);
 510 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
 511         if (!substream->oss.oss)
 512 #endif
 513                 if (atomic_read(&substream->mmap_count))
 514                         return -EBADFD;
 515
 516         params->rmask = ~0U;
 517         err = snd_pcm_hw_refine(substream, params);
 518         if (err < 0)
 519                 goto _error;
 520
 521         err = snd_pcm_hw_params_choose(substream, params);
 522         if (err < 0)
 523                 goto _error;
 524
 525         if (substream->ops->hw_params != NULL) {
 526                 err = substream->ops->hw_params(substream, params);
 527                 if (err < 0)
 528                         goto _error;
 529         }
 530
 531         runtime->access = params_access(params);
 532         runtime->format = params_format(params);
 533         runtime->subformat = params_subformat(params);
 534         runtime->channels = params_channels(params);
 535         runtime->rate = params_rate(params);
 536         runtime->period_size = params_period_size(params);
 537         runtime->periods = params_periods(params);
 538         runtime->buffer_size = params_buffer_size(params);
 539         runtime->info = params->info;
 540         runtime->rate_num = params->rate_num;
 541         runtime->rate_den = params->rate_den;
 542         runtime->no_period_wakeup =
 543                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 544                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 545
 546         bits = snd_pcm_format_physical_width(runtime->format);
 547         runtime->sample_bits = bits;
 548         bits *= runtime->channels;
 549         runtime->frame_bits = bits;
 550         frames = 1;
 551         while (bits % 8 != 0) {
 552                 bits *= 2;
 553                 frames *= 2;
 554         }
 555         runtime->byte_align = bits / 8;
 556         runtime->min_align = frames;
 557
 558         /* Default sw params */
 559         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 560         runtime->period_step = 1;
 561         runtime->control->avail_min = runtime->period_size;
 562         runtime->start_threshold = 1;
 563         runtime->stop_threshold = runtime->buffer_size;
 564         runtime->silence_threshold = 0;
 565         runtime->silence_size = 0;
 566         runtime->boundary = runtime->buffer_size;
 567         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 568                 runtime->boundary *= 2;
 569
 570         snd_pcm_timer_resolution_change(substream);
 571         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 572
 573         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 574                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 575         if ((usecs = period_to_usecs(runtime)) >= 0)
 576                 pm_qos_add_request(&substream->latency_pm_qos_req,
 577                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 578         return 0;
 579  _error:
 580         /* hardware might be unusable from this time,
 581            so we force application to retry to set
 582            the correct hardware parameter settings */
 583         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 584         if (substream->ops->hw_free != NULL)
 585                 substream->ops->hw_free(substream);
 586         return err;
 587 }
 588
 589 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 590                                   struct snd_pcm_hw_params __user * _params)
 591 {
 592         struct snd_pcm_hw_params *params;
 593         int err;
 594
 595         params = memdup_user(_params, sizeof(*params));
 596         if (IS_ERR(params))
 597                 return PTR_ERR(params);
 598
 599         err = snd_pcm_hw_params(substream, params);
 600         if (copy_to_user(_params, params, sizeof(*params))) {
 601                 if (!err)
 602                         err = -EFAULT;
 603         }
 604
 605         kfree(params);
 606         return err;
 607 }
 608
 609 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 610 {
 611         struct snd_pcm_runtime *runtime;
 612         int result = 0;
 613
 614         if (PCM_RUNTIME_CHECK(substream))
 615                 return -ENXIO;
 616         runtime = substream->runtime;
 617         snd_pcm_stream_lock_irq(substream);
 618         switch (runtime->status->state) {
 619         case SNDRV_PCM_STATE_SETUP:
 620         case SNDRV_PCM_STATE_PREPARED:
 621                 break;
 622         default:
 623                 snd_pcm_stream_unlock_irq(substream);
 624                 return -EBADFD;
 625         }
 626         snd_pcm_stream_unlock_irq(substream);
 627         if (atomic_read(&substream->mmap_count))
 628                 return -EBADFD;
 629         if (substream->ops->hw_free)
 630                 result = substream->ops->hw_free(substream);
 631         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 632         pm_qos_remove_request(&substream->latency_pm_qos_req);
 633         return result;
 634 }
 635
 636 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 637                              struct snd_pcm_sw_params *params)
 638 {
 639         struct snd_pcm_runtime *runtime;
 640         int err;
 641
 642         if (PCM_RUNTIME_CHECK(substream))
 643                 return -ENXIO;
 644         runtime = substream->runtime;
 645         snd_pcm_stream_lock_irq(substream);
 646         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 647                 snd_pcm_stream_unlock_irq(substream);
 648                 return -EBADFD;
 649         }
 650         snd_pcm_stream_unlock_irq(substream);
 651
 652         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 653                 return -EINVAL;
 654         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 655             params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
 656                 return -EINVAL;
 657         if (params->avail_min == 0)
 658                 return -EINVAL;
 659         if (params->silence_size >= runtime->boundary) {
 660                 if (params->silence_threshold != 0)
 661                         return -EINVAL;
 662         } else {
 663                 if (params->silence_size > params->silence_threshold)
 664                         return -EINVAL;
 665                 if (params->silence_threshold > runtime->buffer_size)
 666                         return -EINVAL;
 667         }
 668         err = 0;
 669         snd_pcm_stream_lock_irq(substream);
 670         runtime->tstamp_mode = params->tstamp_mode;
 671         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
 672                 runtime->tstamp_type = params->tstamp_type;
 673         runtime->period_step = params->period_step;
 674         runtime->control->avail_min = params->avail_min;
 675         runtime->start_threshold = params->start_threshold;
 676         runtime->stop_threshold = params->stop_threshold;
 677         runtime->silence_threshold = params->silence_threshold;
 678         runtime->silence_size = params->silence_size;
 679         params->boundary = runtime->boundary;
 680         if (snd_pcm_running(substream)) {
 681                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 682                     runtime->silence_size > 0)
 683                         snd_pcm_playback_silence(substream, ULONG_MAX);
 684                 err = snd_pcm_update_state(substream, runtime);
 685         }
 686         snd_pcm_stream_unlock_irq(substream);
 687         return err;
 688 }
 689
 690 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 691                                   struct snd_pcm_sw_params __user * _params)
 692 {
 693         struct snd_pcm_sw_params params;
 694         int err;
 695         if (copy_from_user(&params, _params, sizeof(params)))
 696                 return -EFAULT;
 697         err = snd_pcm_sw_params(substream, &params);
 698         if (copy_to_user(_params, &params, sizeof(params)))
 699                 return -EFAULT;
 700         return err;
 701 }
 702
 703 int snd_pcm_status(struct snd_pcm_substream *substream,
 704                    struct snd_pcm_status *status)
 705 {
 706         struct snd_pcm_runtime *runtime = substream->runtime;
 707
 708         snd_pcm_stream_lock_irq(substream);
 709         status->state = runtime->status->state;
 710         status->suspended_state = runtime->status->suspended_state;
 711         if (status->state == SNDRV_PCM_STATE_OPEN)
 712                 goto _end;
 713         status->trigger_tstamp = runtime->trigger_tstamp;
 714         if (snd_pcm_running(substream)) {
 715                 snd_pcm_update_hw_ptr(substream);
 716                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 717                         status->tstamp = runtime->status->tstamp;
 718                         status->audio_tstamp =
 719                                 runtime->status->audio_tstamp;
 720                         goto _tstamp_end;
 721                 }
 722         }
 723         snd_pcm_gettime(runtime, &status->tstamp);
 724  _tstamp_end:
 725         status->appl_ptr = runtime->control->appl_ptr;
 726         status->hw_ptr = runtime->status->hw_ptr;
 727         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 728                 status->avail = snd_pcm_playback_avail(runtime);
 729                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 730                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 731                         status->delay = runtime->buffer_size - status->avail;
 732                         status->delay += runtime->delay;
 733                 } else
 734                         status->delay = 0;
 735         } else {
 736                 status->avail = snd_pcm_capture_avail(runtime);
 737                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 738                         status->delay = status->avail + runtime->delay;
 739                 else
 740                         status->delay = 0;
 741         }
 742         status->avail_max = runtime->avail_max;
 743         status->overrange = runtime->overrange;
 744         runtime->avail_max = 0;
 745         runtime->overrange = 0;
 746  _end:
 747         snd_pcm_stream_unlock_irq(substream);
 748         return 0;
 749 }
 750
 751 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 752                                struct snd_pcm_status __user * _status)
 753 {
 754         struct snd_pcm_status status;
 755         int res;
 756
 757         memset(&status, 0, sizeof(status));
 758         res = snd_pcm_status(substream, &status);
 759         if (res < 0)
 760                 return res;
 761         if (copy_to_user(_status, &status, sizeof(status)))
 762                 return -EFAULT;
 763         return 0;
 764 }
 765
 766 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 767                                 struct snd_pcm_channel_info * info)
 768 {
 769         struct snd_pcm_runtime *runtime;
 770         unsigned int channel;
 771
 772         channel = info->channel;
 773         runtime = substream->runtime;
 774         snd_pcm_stream_lock_irq(substream);
 775         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 776                 snd_pcm_stream_unlock_irq(substream);
 777                 return -EBADFD;
 778         }
 779         snd_pcm_stream_unlock_irq(substream);
 780         if (channel >= runtime->channels)
 781                 return -EINVAL;
 782         memset(info, 0, sizeof(*info));
 783         info->channel = channel;
 784         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 785 }
 786
 787 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 788                                      struct snd_pcm_channel_info __user * _info)
 789 {
 790         struct snd_pcm_channel_info info;
 791         int res;
 792
 793         if (copy_from_user(&info, _info, sizeof(info)))
 794                 return -EFAULT;
 795         res = snd_pcm_channel_info(substream, &info);
 796         if (res < 0)
 797                 return res;
 798         if (copy_to_user(_info, &info, sizeof(info)))
 799                 return -EFAULT;
 800         return 0;
 801 }
 802
 803 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 804 {
 805         struct snd_pcm_runtime *runtime = substream->runtime;
 806         if (runtime->trigger_master == NULL)
 807                 return;
 808         if (runtime->trigger_master == substream) {
 809                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 810         } else {
 811                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 812                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 813         }
 814         runtime->trigger_master = NULL;
 815 }
 816
 817 struct action_ops {
 818         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 819         int (*do_action)(struct snd_pcm_substream *substream, int state);
 820         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 821         void (*post_action)(struct snd_pcm_substream *substream, int state);
 822 };
 823
 824 /*
 825  *  this functions is core for handling of linked stream
 826  *  Note: the stream state might be changed also on failure
 827  *  Note2: call with calling stream lock + link lock
 828  */
 829 static int snd_pcm_action_group(struct action_ops *ops,
 830                                 struct snd_pcm_substream *substream,
 831                                 int state, int do_lock)
 832 {
 833         struct snd_pcm_substream *s = NULL;
 834         struct snd_pcm_substream *s1;
 835         int res = 0, depth = 1;
 836
 837         snd_pcm_group_for_each_entry(s, substream) {
 838                 if (do_lock && s != substream) {
 839                         if (s->pcm->nonatomic)
 840                                 mutex_lock_nested(&s->self_group.mutex, depth);
 841                         else
 842                                 spin_lock_nested(&s->self_group.lock, depth);
 843                         depth++;
 844                 }
 845                 res = ops->pre_action(s, state);
 846                 if (res < 0)
 847                         goto _unlock;
 848         }
 849         snd_pcm_group_for_each_entry(s, substream) {
 850                 res = ops->do_action(s, state);
 851                 if (res < 0) {
 852                         if (ops->undo_action) {
 853                                 snd_pcm_group_for_each_entry(s1, substream) {
 854                                         if (s1 == s) /* failed stream */
 855                                                 break;
 856                                         ops->undo_action(s1, state);
 857                                 }
 858                         }
 859                         s = NULL; /* unlock all */
 860                         goto _unlock;
 861                 }
 862         }
 863         snd_pcm_group_for_each_entry(s, substream) {
 864                 ops->post_action(s, state);
 865         }
 866  _unlock:
 867         if (do_lock) {
 868                 /* unlock streams */
 869                 snd_pcm_group_for_each_entry(s1, substream) {
 870                         if (s1 != substream) {
 871                                 if (s1->pcm->nonatomic)
 872                                         mutex_unlock(&s1->self_group.mutex);
 873                                 else
 874                                         spin_unlock(&s1->self_group.lock);
 875                         }
 876                         if (s1 == s)    /* end */
 877                                 break;
 878                 }
 879         }
 880         return res;
 881 }
 882
 883 /*
 884  *  Note: call with stream lock
 885  */
 886 static int snd_pcm_action_single(struct action_ops *ops,
 887                                  struct snd_pcm_substream *substream,
 888                                  int state)
 889 {
 890         int res;
 891
 892         res = ops->pre_action(substream, state);
 893         if (res < 0)
 894                 return res;
 895         res = ops->do_action(substream, state);
 896         if (res == 0)
 897                 ops->post_action(substream, state);
 898         else if (ops->undo_action)
 899                 ops->undo_action(substream, state);
 900         return res;
 901 }
 902
 903 /*
 904  *  Note: call with stream lock
 905  */
 906 static int snd_pcm_action(struct action_ops *ops,
 907                           struct snd_pcm_substream *substream,
 908                           int state)
 909 {
 910         int res;
 911
 912         if (!snd_pcm_stream_linked(substream))
 913                 return snd_pcm_action_single(ops, substream, state);
 914
 915         if (substream->pcm->nonatomic) {
 916                 if (!mutex_trylock(&substream->group->mutex)) {
 917                         mutex_unlock(&substream->self_group.mutex);
 918                         mutex_lock(&substream->group->mutex);
 919                         mutex_lock(&substream->self_group.mutex);
 920                 }
 921                 res = snd_pcm_action_group(ops, substream, state, 1);
 922                 mutex_unlock(&substream->group->mutex);
 923         } else {
 924                 if (!spin_trylock(&substream->group->lock)) {
 925                         spin_unlock(&substream->self_group.lock);
 926                         spin_lock(&substream->group->lock);
 927                         spin_lock(&substream->self_group.lock);
 928                 }
 929                 res = snd_pcm_action_group(ops, substream, state, 1);
 930                 spin_unlock(&substream->group->lock);
 931         }
 932         return res;
 933 }
 934
 935 /*
 936  *  Note: don't use any locks before
 937  */
 938 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 939                                    struct snd_pcm_substream *substream,
 940                                    int state)
 941 {
 942         int res;
 943
 944         snd_pcm_stream_lock_irq(substream);
 945         res = snd_pcm_action(ops, substream, state);
 946         snd_pcm_stream_unlock_irq(substream);
 947         return res;
 948 }
 949
 950 /*
 951  */
 952 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 953                                     struct snd_pcm_substream *substream,
 954                                     int state)
 955 {
 956         int res;
 957
 958         down_read(&snd_pcm_link_rwsem);
 959         if (snd_pcm_stream_linked(substream))
 960                 res = snd_pcm_action_group(ops, substream, state, 0);
 961         else
 962                 res = snd_pcm_action_single(ops, substream, state);
 963         up_read(&snd_pcm_link_rwsem);
 964         return res;
 965 }
 966
 967 /*
 968  * start callbacks
 969  */
 970 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 971 {
 972         struct snd_pcm_runtime *runtime = substream->runtime;
 973         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 974                 return -EBADFD;
 975         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 976             !snd_pcm_playback_data(substream))
 977                 return -EPIPE;
 978         runtime->trigger_master = substream;
 979         return 0;
 980 }
 981
 982 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 983 {
 984         if (substream->runtime->trigger_master != substream)
 985                 return 0;
 986         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 987 }
 988
 989 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 990 {
 991         if (substream->runtime->trigger_master == substream)
 992                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 993 }
 994
 995 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 996 {
 997         struct snd_pcm_runtime *runtime = substream->runtime;
 998         snd_pcm_trigger_tstamp(substream);
 999         runtime->hw_ptr_jiffies = jiffies;
1000         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1001                                                             runtime->rate;
1002         runtime->status->state = state;
1003         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1004             runtime->silence_size > 0)
1005                 snd_pcm_playback_silence(substream, ULONG_MAX);
1006         if (substream->timer)
1007                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1008                                  &runtime->trigger_tstamp);
1009 }
1010
1011 static struct action_ops snd_pcm_action_start = {
1012         .pre_action = snd_pcm_pre_start,
1013         .do_action = snd_pcm_do_start,
1014         .undo_action = snd_pcm_undo_start,
1015         .post_action = snd_pcm_post_start
1016 };
1017
1018 /**
1019  * snd_pcm_start - start all linked streams
1020  * @substream: the PCM substream instance
1021  *
1022  * Return: Zero if successful, or a negative error code.
1023  */
1024 int snd_pcm_start(struct snd_pcm_substream *substream)
1025 {
1026         return snd_pcm_action(&snd_pcm_action_start, substream,
1027                               SNDRV_PCM_STATE_RUNNING);
1028 }
1029
1030 /*
1031  * stop callbacks
1032  */
1033 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1034 {
1035         struct snd_pcm_runtime *runtime = substream->runtime;
1036         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1037                 return -EBADFD;
1038         runtime->trigger_master = substream;
1039         return 0;
1040 }
1041
1042 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1043 {
1044         if (substream->runtime->trigger_master == substream &&
1045             snd_pcm_running(substream))
1046                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1047         return 0; /* unconditonally stop all substreams */
1048 }
1049
1050 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1051 {
1052         struct snd_pcm_runtime *runtime = substream->runtime;
1053         if (runtime->status->state != state) {
1054                 snd_pcm_trigger_tstamp(substream);
1055                 runtime->status->state = state;
1056                 if (substream->timer)
1057                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1058                                          &runtime->trigger_tstamp);
1059         }
1060         wake_up(&runtime->sleep);
1061         wake_up(&runtime->tsleep);
1062 }
1063
1064 static struct action_ops snd_pcm_action_stop = {
1065         .pre_action = snd_pcm_pre_stop,
1066         .do_action = snd_pcm_do_stop,
1067         .post_action = snd_pcm_post_stop
1068 };
1069
1070 /**
1071  * snd_pcm_stop - try to stop all running streams in the substream group
1072  * @substream: the PCM substream instance
1073  * @state: PCM state after stopping the stream
1074  *
1075  * The state of each stream is then changed to the given state unconditionally.
1076  *
1077  * Return: Zero if successful, or a negative error code.
1078  */
1079 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1080 {
1081         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1082 }
1083
1084 EXPORT_SYMBOL(snd_pcm_stop);
1085
1086 /**
1087  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1088  * @substream: the PCM substream
1089  *
1090  * After stopping, the state is changed to SETUP.
1091  * Unlike snd_pcm_stop(), this affects only the given stream.
1092  *
1093  * Return: Zero if succesful, or a negative error code.
1094  */
1095 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1096 {
1097         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1098                                      SNDRV_PCM_STATE_SETUP);
1099 }
1100
1101 /**
1102  * snd_pcm_stop_xrun - stop the running streams as XRUN
1103  * @substream: the PCM substream instance
1104  *
1105  * This stops the given running substream (and all linked substreams) as XRUN.
1106  * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1107  *
1108  * Return: Zero if successful, or a negative error code.
1109  */
1110 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1111 {
1112         unsigned long flags;
1113         int ret = 0;
1114
1115         snd_pcm_stream_lock_irqsave(substream, flags);
1116         if (snd_pcm_running(substream))
1117                 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1118         snd_pcm_stream_unlock_irqrestore(substream, flags);
1119         return ret;
1120 }
1121 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1122
1123 /*
1124  * pause callbacks
1125  */
1126 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1127 {
1128         struct snd_pcm_runtime *runtime = substream->runtime;
1129         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1130                 return -ENOSYS;
1131         if (push) {
1132                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1133                         return -EBADFD;
1134         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1135                 return -EBADFD;
1136         runtime->trigger_master = substream;
1137         return 0;
1138 }
1139
1140 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1141 {
1142         if (substream->runtime->trigger_master != substream)
1143                 return 0;
1144         /* some drivers might use hw_ptr to recover from the pause -
1145            update the hw_ptr now */
1146         if (push)
1147                 snd_pcm_update_hw_ptr(substream);
1148         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1149          * a delta between the current jiffies, this gives a large enough
1150          * delta, effectively to skip the check once.
1151          */
1152         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1153         return substream->ops->trigger(substream,
1154                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1155                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1156 }
1157
1158 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1159 {
1160         if (substream->runtime->trigger_master == substream)
1161                 substream->ops->trigger(substream,
1162                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1163                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1164 }
1165
1166 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1167 {
1168         struct snd_pcm_runtime *runtime = substream->runtime;
1169         snd_pcm_trigger_tstamp(substream);
1170         if (push) {
1171                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1172                 if (substream->timer)
1173                         snd_timer_notify(substream->timer,
1174                                          SNDRV_TIMER_EVENT_MPAUSE,
1175                                          &runtime->trigger_tstamp);
1176                 wake_up(&runtime->sleep);
1177                 wake_up(&runtime->tsleep);
1178         } else {
1179                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1180                 if (substream->timer)
1181                         snd_timer_notify(substream->timer,
1182                                          SNDRV_TIMER_EVENT_MCONTINUE,
1183                                          &runtime->trigger_tstamp);
1184         }
1185 }
1186
1187 static struct action_ops snd_pcm_action_pause = {
1188         .pre_action = snd_pcm_pre_pause,
1189         .do_action = snd_pcm_do_pause,
1190         .undo_action = snd_pcm_undo_pause,
1191         .post_action = snd_pcm_post_pause
1192 };
1193
1194 /*
1195  * Push/release the pause for all linked streams.
1196  */
1197 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1198 {
1199         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1200 }
1201
1202 #ifdef CONFIG_PM
1203 /* suspend */
1204
1205 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1206 {
1207         struct snd_pcm_runtime *runtime = substream->runtime;
1208         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1209                 return -EBUSY;
1210         runtime->trigger_master = substream;
1211         return 0;
1212 }
1213
1214 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1215 {
1216         struct snd_pcm_runtime *runtime = substream->runtime;
1217         if (runtime->trigger_master != substream)
1218                 return 0;
1219         if (! snd_pcm_running(substream))
1220                 return 0;
1221         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1222         return 0; /* suspend unconditionally */
1223 }
1224
1225 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1226 {
1227         struct snd_pcm_runtime *runtime = substream->runtime;
1228         snd_pcm_trigger_tstamp(substream);
1229         runtime->status->suspended_state = runtime->status->state;
1230         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1231         if (substream->timer)
1232                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1233                                  &runtime->trigger_tstamp);
1234         wake_up(&runtime->sleep);
1235         wake_up(&runtime->tsleep);
1236 }
1237
1238 static struct action_ops snd_pcm_action_suspend = {
1239         .pre_action = snd_pcm_pre_suspend,
1240         .do_action = snd_pcm_do_suspend,
1241         .post_action = snd_pcm_post_suspend
1242 };
1243
1244 /**
1245  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1246  * @substream: the PCM substream
1247  *
1248  * After this call, all streams are changed to SUSPENDED state.
1249  *
1250  * Return: Zero if successful (or @substream is %NULL), or a negative error
1251  * code.
1252  */
1253 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1254 {
1255         int err;
1256         unsigned long flags;
1257
1258         if (! substream)
1259                 return 0;
1260
1261         snd_pcm_stream_lock_irqsave(substream, flags);
1262         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1263         snd_pcm_stream_unlock_irqrestore(substream, flags);
1264         return err;
1265 }
1266
1267 EXPORT_SYMBOL(snd_pcm_suspend);
1268
1269 /**
1270  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1271  * @pcm: the PCM instance
1272  *
1273  * After this call, all streams are changed to SUSPENDED state.
1274  *
1275  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1276  */
1277 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1278 {
1279         struct snd_pcm_substream *substream;
1280         int stream, err = 0;
1281
1282         if (! pcm)
1283                 return 0;
1284
1285         for (stream = 0; stream < 2; stream++) {
1286                 for (substream = pcm->streams[stream].substream;
1287                      substream; substream = substream->next) {
1288                         /* FIXME: the open/close code should lock this as well */
1289                         if (substream->runtime == NULL)
1290                                 continue;
1291                         err = snd_pcm_suspend(substream);
1292                         if (err < 0 && err != -EBUSY)
1293                                 return err;
1294                 }
1295         }
1296         return 0;
1297 }
1298
1299 EXPORT_SYMBOL(snd_pcm_suspend_all);
1300
1301 /* resume */
1302
1303 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1304 {
1305         struct snd_pcm_runtime *runtime = substream->runtime;
1306         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1307                 return -ENOSYS;
1308         runtime->trigger_master = substream;
1309         return 0;
1310 }
1311
1312 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1313 {
1314         struct snd_pcm_runtime *runtime = substream->runtime;
1315         if (runtime->trigger_master != substream)
1316                 return 0;
1317         /* DMA not running previously? */
1318         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1319             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1320              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1321                 return 0;
1322         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1323 }
1324
1325 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1326 {
1327         if (substream->runtime->trigger_master == substream &&
1328             snd_pcm_running(substream))
1329                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1330 }
1331
1332 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1333 {
1334         struct snd_pcm_runtime *runtime = substream->runtime;
1335         snd_pcm_trigger_tstamp(substream);
1336         runtime->status->state = runtime->status->suspended_state;
1337         if (substream->timer)
1338                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1339                                  &runtime->trigger_tstamp);
1340 }
1341
1342 static struct action_ops snd_pcm_action_resume = {
1343         .pre_action = snd_pcm_pre_resume,
1344         .do_action = snd_pcm_do_resume,
1345         .undo_action = snd_pcm_undo_resume,
1346         .post_action = snd_pcm_post_resume
1347 };
1348
1349 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1350 {
1351         struct snd_card *card = substream->pcm->card;
1352         int res;
1353
1354         snd_power_lock(card);
1355         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1356                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1357         snd_power_unlock(card);
1358         return res;
1359 }
1360
1361 #else
1362
1363 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1364 {
1365         return -ENOSYS;
1366 }
1367
1368 #endif /* CONFIG_PM */
1369
1370 /*
1371  * xrun ioctl
1372  *
1373  * Change the RUNNING stream(s) to XRUN state.
1374  */
1375 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1376 {
1377         struct snd_card *card = substream->pcm->card;
1378         struct snd_pcm_runtime *runtime = substream->runtime;
1379         int result;
1380
1381         snd_power_lock(card);
1382         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1383                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1384                 if (result < 0)
1385                         goto _unlock;
1386         }
1387
1388         snd_pcm_stream_lock_irq(substream);
1389         switch (runtime->status->state) {
1390         case SNDRV_PCM_STATE_XRUN:
1391                 result = 0;     /* already there */
1392                 break;
1393         case SNDRV_PCM_STATE_RUNNING:
1394                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1395                 break;
1396         default:
1397                 result = -EBADFD;
1398         }
1399         snd_pcm_stream_unlock_irq(substream);
1400  _unlock:
1401         snd_power_unlock(card);
1402         return result;
1403 }
1404
1405 /*
1406  * reset ioctl
1407  */
1408 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1409 {
1410         struct snd_pcm_runtime *runtime = substream->runtime;
1411         switch (runtime->status->state) {
1412         case SNDRV_PCM_STATE_RUNNING:
1413         case SNDRV_PCM_STATE_PREPARED:
1414         case SNDRV_PCM_STATE_PAUSED:
1415         case SNDRV_PCM_STATE_SUSPENDED:
1416                 return 0;
1417         default:
1418                 return -EBADFD;
1419         }
1420 }
1421
1422 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1423 {
1424         struct snd_pcm_runtime *runtime = substream->runtime;
1425         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1426         if (err < 0)
1427                 return err;
1428         runtime->hw_ptr_base = 0;
1429         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1430                 runtime->status->hw_ptr % runtime->period_size;
1431         runtime->silence_start = runtime->status->hw_ptr;
1432         runtime->silence_filled = 0;
1433         return 0;
1434 }
1435
1436 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1437 {
1438         struct snd_pcm_runtime *runtime = substream->runtime;
1439         runtime->control->appl_ptr = runtime->status->hw_ptr;
1440         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1441             runtime->silence_size > 0)
1442                 snd_pcm_playback_silence(substream, ULONG_MAX);
1443 }
1444
1445 static struct action_ops snd_pcm_action_reset = {
1446         .pre_action = snd_pcm_pre_reset,
1447         .do_action = snd_pcm_do_reset,
1448         .post_action = snd_pcm_post_reset
1449 };
1450
1451 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1452 {
1453         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1454 }
1455
1456 /*
1457  * prepare ioctl
1458  */
1459 /* we use the second argument for updating f_flags */
1460 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1461                                int f_flags)
1462 {
1463         struct snd_pcm_runtime *runtime = substream->runtime;
1464         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1465             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1466                 return -EBADFD;
1467         if (snd_pcm_running(substream))
1468                 return -EBUSY;
1469         substream->f_flags = f_flags;
1470         return 0;
1471 }
1472
1473 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1474 {
1475         int err;
1476         err = substream->ops->prepare(substream);
1477         if (err < 0)
1478                 return err;
1479         return snd_pcm_do_reset(substream, 0);
1480 }
1481
1482 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1483 {
1484         struct snd_pcm_runtime *runtime = substream->runtime;
1485         runtime->control->appl_ptr = runtime->status->hw_ptr;
1486         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1487 }
1488
1489 static struct action_ops snd_pcm_action_prepare = {
1490         .pre_action = snd_pcm_pre_prepare,
1491         .do_action = snd_pcm_do_prepare,
1492         .post_action = snd_pcm_post_prepare
1493 };
1494
1495 /**
1496  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1497  * @substream: the PCM substream instance
1498  * @file: file to refer f_flags
1499  *
1500  * Return: Zero if successful, or a negative error code.
1501  */
1502 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1503                            struct file *file)
1504 {
1505         int res;
1506         struct snd_card *card = substream->pcm->card;
1507         int f_flags;
1508
1509         if (file)
1510                 f_flags = file->f_flags;
1511         else
1512                 f_flags = substream->f_flags;
1513
1514         snd_power_lock(card);
1515         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1516                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1517                                                substream, f_flags);
1518         snd_power_unlock(card);
1519         return res;
1520 }
1521
1522 /*
1523  * drain ioctl
1524  */
1525
1526 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1527 {
1528         struct snd_pcm_runtime *runtime = substream->runtime;
1529         switch (runtime->status->state) {
1530         case SNDRV_PCM_STATE_OPEN:
1531         case SNDRV_PCM_STATE_DISCONNECTED:
1532         case SNDRV_PCM_STATE_SUSPENDED:
1533                 return -EBADFD;
1534         }
1535         runtime->trigger_master = substream;
1536         return 0;
1537 }
1538
1539 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1540 {
1541         struct snd_pcm_runtime *runtime = substream->runtime;
1542         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1543                 switch (runtime->status->state) {
1544                 case SNDRV_PCM_STATE_PREPARED:
1545                         /* start playback stream if possible */
1546                         if (! snd_pcm_playback_empty(substream)) {
1547                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1548                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1549                         }
1550                         break;
1551                 case SNDRV_PCM_STATE_RUNNING:
1552                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1553                         break;
1554                 case SNDRV_PCM_STATE_XRUN:
1555                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1556                         break;
1557                 default:
1558                         break;
1559                 }
1560         } else {
1561                 /* stop running stream */
1562                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1563                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1564                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1565                         snd_pcm_do_stop(substream, new_state);
1566                         snd_pcm_post_stop(substream, new_state);
1567                 }
1568         }
1569         return 0;
1570 }
1571
1572 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1573 {
1574 }
1575
1576 static struct action_ops snd_pcm_action_drain_init = {
1577         .pre_action = snd_pcm_pre_drain_init,
1578         .do_action = snd_pcm_do_drain_init,
1579         .post_action = snd_pcm_post_drain_init
1580 };
1581
1582 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1583
1584 /*
1585  * Drain the stream(s).
1586  * When the substream is linked, sync until the draining of all playback streams
1587  * is finished.
1588  * After this call, all streams are supposed to be either SETUP or DRAINING
1589  * (capture only) state.
1590  */
1591 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1592                          struct file *file)
1593 {
1594         struct snd_card *card;
1595         struct snd_pcm_runtime *runtime;
1596         struct snd_pcm_substream *s;
1597         wait_queue_t wait;
1598         int result = 0;
1599         int nonblock = 0;
1600
1601         card = substream->pcm->card;
1602         runtime = substream->runtime;
1603
1604         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1605                 return -EBADFD;
1606
1607         snd_power_lock(card);
1608         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1609                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1610                 if (result < 0) {
1611                         snd_power_unlock(card);
1612                         return result;
1613                 }
1614         }
1615
1616         if (file) {
1617                 if (file->f_flags & O_NONBLOCK)
1618                         nonblock = 1;
1619         } else if (substream->f_flags & O_NONBLOCK)
1620                 nonblock = 1;
1621
1622         down_read(&snd_pcm_link_rwsem);
1623         snd_pcm_stream_lock_irq(substream);
1624         /* resume pause */
1625         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1626                 snd_pcm_pause(substream, 0);
1627
1628         /* pre-start/stop - all running streams are changed to DRAINING state */
1629         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1630         if (result < 0)
1631                 goto unlock;
1632         /* in non-blocking, we don't wait in ioctl but let caller poll */
1633         if (nonblock) {
1634                 result = -EAGAIN;
1635                 goto unlock;
1636         }
1637
1638         for (;;) {
1639                 long tout;
1640                 struct snd_pcm_runtime *to_check;
1641                 if (signal_pending(current)) {
1642                         result = -ERESTARTSYS;
1643                         break;
1644                 }
1645                 /* find a substream to drain */
1646                 to_check = NULL;
1647                 snd_pcm_group_for_each_entry(s, substream) {
1648                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1649                                 continue;
1650                         runtime = s->runtime;
1651                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1652                                 to_check = runtime;
1653                                 break;
1654                         }
1655                 }
1656                 if (!to_check)
1657                         break; /* all drained */
1658                 init_waitqueue_entry(&wait, current);
1659                 add_wait_queue(&to_check->sleep, &wait);
1660                 snd_pcm_stream_unlock_irq(substream);
1661                 up_read(&snd_pcm_link_rwsem);
1662                 snd_power_unlock(card);
1663                 if (runtime->no_period_wakeup)
1664                         tout = MAX_SCHEDULE_TIMEOUT;
1665                 else {
1666                         tout = 10;
1667                         if (runtime->rate) {
1668                                 long t = runtime->period_size * 2 / runtime->rate;
1669                                 tout = max(t, tout);
1670                         }
1671                         tout = msecs_to_jiffies(tout * 1000);
1672                 }
1673                 tout = schedule_timeout_interruptible(tout);
1674                 snd_power_lock(card);
1675                 down_read(&snd_pcm_link_rwsem);
1676                 snd_pcm_stream_lock_irq(substream);
1677                 remove_wait_queue(&to_check->sleep, &wait);
1678                 if (card->shutdown) {
1679                         result = -ENODEV;
1680                         break;
1681                 }
1682                 if (tout == 0) {
1683                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1684                                 result = -ESTRPIPE;
1685                         else {
1686                                 dev_dbg(substream->pcm->card->dev,
1687                                         "playback drain error (DMA or IRQ trouble?)\n");
1688                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1689                                 result = -EIO;
1690                         }
1691                         break;
1692                 }
1693         }
1694
1695  unlock:
1696         snd_pcm_stream_unlock_irq(substream);
1697         up_read(&snd_pcm_link_rwsem);
1698         snd_power_unlock(card);
1699
1700         return result;
1701 }
1702
1703 /*
1704  * drop ioctl
1705  *
1706  * Immediately put all linked substreams into SETUP state.
1707  */
1708 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1709 {
1710         struct snd_pcm_runtime *runtime;
1711         int result = 0;
1712
1713         if (PCM_RUNTIME_CHECK(substream))
1714                 return -ENXIO;
1715         runtime = substream->runtime;
1716
1717         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1718             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1719             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1720                 return -EBADFD;
1721
1722         snd_pcm_stream_lock_irq(substream);
1723         /* resume pause */
1724         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1725                 snd_pcm_pause(substream, 0);
1726
1727         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1728         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1729         snd_pcm_stream_unlock_irq(substream);
1730
1731         return result;
1732 }
1733
1734
1735 static bool is_pcm_file(struct file *file)
1736 {
1737         struct inode *inode = file_inode(file);
1738         unsigned int minor;
1739
1740         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1741                 return false;
1742         minor = iminor(inode);
1743         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1744                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1745 }
1746
1747 /*
1748  * PCM link handling
1749  */
1750 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1751 {
1752         int res = 0;
1753         struct snd_pcm_file *pcm_file;
1754         struct snd_pcm_substream *substream1;
1755         struct snd_pcm_group *group;
1756         struct fd f = fdget(fd);
1757
1758         if (!f.file)
1759                 return -EBADFD;
1760         if (!is_pcm_file(f.file)) {
1761                 res = -EBADFD;
1762                 goto _badf;
1763         }
1764         pcm_file = f.file->private_data;
1765         substream1 = pcm_file->substream;
1766         group = kmalloc(sizeof(*group), GFP_KERNEL);
1767         if (!group) {
1768                 res = -ENOMEM;
1769                 goto _nolock;
1770         }
1771         down_write(&snd_pcm_link_rwsem);
1772         write_lock_irq(&snd_pcm_link_rwlock);
1773         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1774             substream->runtime->status->state != substream1->runtime->status->state ||
1775             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1776                 res = -EBADFD;
1777                 goto _end;
1778         }
1779         if (snd_pcm_stream_linked(substream1)) {
1780                 res = -EALREADY;
1781                 goto _end;
1782         }
1783         if (!snd_pcm_stream_linked(substream)) {
1784                 substream->group = group;
1785                 group = NULL;
1786                 spin_lock_init(&substream->group->lock);
1787                 mutex_init(&substream->group->mutex);
1788                 INIT_LIST_HEAD(&substream->group->substreams);
1789                 list_add_tail(&substream->link_list, &substream->group->substreams);
1790                 substream->group->count = 1;
1791         }
1792         list_add_tail(&substream1->link_list, &substream->group->substreams);
1793         substream->group->count++;
1794         substream1->group = substream->group;
1795  _end:
1796         write_unlock_irq(&snd_pcm_link_rwlock);
1797         up_write(&snd_pcm_link_rwsem);
1798  _nolock:
1799         snd_card_unref(substream1->pcm->card);
1800         kfree(group);
1801  _badf:
1802         fdput(f);
1803         return res;
1804 }
1805
1806 static void relink_to_local(struct snd_pcm_substream *substream)
1807 {
1808         substream->group = &substream->self_group;
1809         INIT_LIST_HEAD(&substream->self_group.substreams);
1810         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1811 }
1812
1813 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1814 {
1815         struct snd_pcm_substream *s;
1816         int res = 0;
1817
1818         down_write(&snd_pcm_link_rwsem);
1819         write_lock_irq(&snd_pcm_link_rwlock);
1820         if (!snd_pcm_stream_linked(substream)) {
1821                 res = -EALREADY;
1822                 goto _end;
1823         }
1824         list_del(&substream->link_list);
1825         substream->group->count--;
1826         if (substream->group->count == 1) {     /* detach the last stream, too */
1827                 snd_pcm_group_for_each_entry(s, substream) {
1828                         relink_to_local(s);
1829                         break;
1830                 }
1831                 kfree(substream->group);
1832         }
1833         relink_to_local(substream);
1834        _end:
1835         write_unlock_irq(&snd_pcm_link_rwlock);
1836         up_write(&snd_pcm_link_rwsem);
1837         return res;
1838 }
1839
1840 /*
1841  * hw configurator
1842  */
1843 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1844                                struct snd_pcm_hw_rule *rule)
1845 {
1846         struct snd_interval t;
1847         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1848                      hw_param_interval_c(params, rule->deps[1]), &t);
1849         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1850 }
1851
1852 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1853                                struct snd_pcm_hw_rule *rule)
1854 {
1855         struct snd_interval t;
1856         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1857                      hw_param_interval_c(params, rule->deps[1]), &t);
1858         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1859 }
1860
1861 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1862                                    struct snd_pcm_hw_rule *rule)
1863 {
1864         struct snd_interval t;
1865         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1866                          hw_param_interval_c(params, rule->deps[1]),
1867                          (unsigned long) rule->private, &t);
1868         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1869 }
1870
1871 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1872                                    struct snd_pcm_hw_rule *rule)
1873 {
1874         struct snd_interval t;
1875         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1876                          (unsigned long) rule->private,
1877                          hw_param_interval_c(params, rule->deps[1]), &t);
1878         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1879 }
1880
1881 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1882                                   struct snd_pcm_hw_rule *rule)
1883 {
1884         unsigned int k;
1885         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1886         struct snd_mask m;
1887         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1888         snd_mask_any(&m);
1889         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1890                 int bits;
1891                 if (! snd_mask_test(mask, k))
1892                         continue;
1893                 bits = snd_pcm_format_physical_width(k);
1894                 if (bits <= 0)
1895                         continue; /* ignore invalid formats */
1896                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1897                         snd_mask_reset(&m, k);
1898         }
1899         return snd_mask_refine(mask, &m);
1900 }
1901
1902 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1903                                        struct snd_pcm_hw_rule *rule)
1904 {
1905         struct snd_interval t;
1906         unsigned int k;
1907         t.min = UINT_MAX;
1908         t.max = 0;
1909         t.openmin = 0;
1910         t.openmax = 0;
1911         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1912                 int bits;
1913                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1914                         continue;
1915                 bits = snd_pcm_format_physical_width(k);
1916                 if (bits <= 0)
1917                         continue; /* ignore invalid formats */
1918                 if (t.min > (unsigned)bits)
1919                         t.min = bits;
1920                 if (t.max < (unsigned)bits)
1921                         t.max = bits;
1922         }
1923         t.integer = 1;
1924         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1925 }
1926
1927 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1928 #error "Change this table"
1929 #endif
1930
1931 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1932                                  48000, 64000, 88200, 96000, 176400, 192000 };
1933
1934 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1935         .count = ARRAY_SIZE(rates),
1936         .list = rates,
1937 };
1938
1939 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1940                                 struct snd_pcm_hw_rule *rule)
1941 {
1942         struct snd_pcm_hardware *hw = rule->private;
1943         return snd_interval_list(hw_param_interval(params, rule->var),
1944                                  snd_pcm_known_rates.count,
1945                                  snd_pcm_known_rates.list, hw->rates);
1946 }
1947
1948 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1949                                             struct snd_pcm_hw_rule *rule)
1950 {
1951         struct snd_interval t;
1952         struct snd_pcm_substream *substream = rule->private;
1953         t.min = 0;
1954         t.max = substream->buffer_bytes_max;
1955         t.openmin = 0;
1956         t.openmax = 0;
1957         t.integer = 1;
1958         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1959 }
1960
1961 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1962 {
1963         struct snd_pcm_runtime *runtime = substream->runtime;
1964         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1965         int k, err;
1966
1967         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1968                 snd_mask_any(constrs_mask(constrs, k));
1969         }
1970
1971         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1972                 snd_interval_any(constrs_interval(constrs, k));
1973         }
1974
1975         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1976         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1977         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1978         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1979         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1980
1981         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1982                                    snd_pcm_hw_rule_format, NULL,
1983                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1984         if (err < 0)
1985                 return err;
1986         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1987                                   snd_pcm_hw_rule_sample_bits, NULL,
1988                                   SNDRV_PCM_HW_PARAM_FORMAT,
1989                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1990         if (err < 0)
1991                 return err;
1992         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1993                                   snd_pcm_hw_rule_div, NULL,
1994                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1995         if (err < 0)
1996                 return err;
1997         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1998                                   snd_pcm_hw_rule_mul, NULL,
1999                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2000         if (err < 0)
2001                 return err;
2002         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2003                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2004                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2005         if (err < 0)
2006                 return err;
2007         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2008                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2009                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2010         if (err < 0)
2011                 return err;
2012         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2013                                   snd_pcm_hw_rule_div, NULL,
2014                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2015         if (err < 0)
2016                 return err;
2017         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2018                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2019                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2020         if (err < 0)
2021                 return err;
2022         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2023                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2024                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2025         if (err < 0)
2026                 return err;
2027         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2028                                   snd_pcm_hw_rule_div, NULL,
2029                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2030         if (err < 0)
2031                 return err;
2032         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2033                                   snd_pcm_hw_rule_div, NULL,
2034                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2035         if (err < 0)
2036                 return err;
2037         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2038                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2039                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2040         if (err < 0)
2041                 return err;
2042         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2043                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2044                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2045         if (err < 0)
2046                 return err;
2047         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2048                                   snd_pcm_hw_rule_mul, NULL,
2049                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2050         if (err < 0)
2051                 return err;
2052         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2053                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2054                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2055         if (err < 0)
2056                 return err;
2057         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2058                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2059                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2060         if (err < 0)
2061                 return err;
2062         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2063                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2064                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2065         if (err < 0)
2066                 return err;
2067         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2068                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2069                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2070         if (err < 0)
2071                 return err;
2072         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2073                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2074                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2075         if (err < 0)
2076                 return err;
2077         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2078                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2079                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2080         if (err < 0)
2081                 return err;
2082         return 0;
2083 }
2084
2085 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2086 {
2087         struct snd_pcm_runtime *runtime = substream->runtime;
2088         struct snd_pcm_hardware *hw = &runtime->hw;
2089         int err;
2090         unsigned int mask = 0;
2091
2092         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2093                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2094         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2095                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2096         if (hw_support_mmap(substream)) {
2097                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2098                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2099                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2100                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2101                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2102                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2103         }
2104         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2105         if (err < 0)
2106                 return err;
2107
2108         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2109         if (err < 0)
2110                 return err;
2111
2112         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2113         if (err < 0)
2114                 return err;
2115
2116         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2117                                            hw->channels_min, hw->channels_max);
2118         if (err < 0)
2119                 return err;
2120
2121         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2122                                            hw->rate_min, hw->rate_max);
2123         if (err < 0)
2124                 return err;
2125
2126         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2127                                            hw->period_bytes_min, hw->period_bytes_max);
2128         if (err < 0)
2129                 return err;
2130
2131         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2132                                            hw->periods_min, hw->periods_max);
2133         if (err < 0)
2134                 return err;
2135
2136         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2137                                            hw->period_bytes_min, hw->buffer_bytes_max);
2138         if (err < 0)
2139                 return err;
2140
2141         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2142                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2143                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2144         if (err < 0)
2145                 return err;
2146
2147         /* FIXME: remove */
2148         if (runtime->dma_bytes) {
2149                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2150                 if (err < 0)
2151                         return err;
2152         }
2153
2154         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2155                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2156                                           snd_pcm_hw_rule_rate, hw,
2157                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2158                 if (err < 0)
2159                         return err;
2160         }
2161
2162         /* FIXME: this belong to lowlevel */
2163         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2164
2165         return 0;
2166 }
2167
2168 static void pcm_release_private(struct snd_pcm_substream *substream)
2169 {
2170         snd_pcm_unlink(substream);
2171 }
2172
2173 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2174 {
2175         substream->ref_count--;
2176         if (substream->ref_count > 0)
2177                 return;
2178
2179         snd_pcm_drop(substream);
2180         if (substream->hw_opened) {
2181                 if (substream->ops->hw_free != NULL)
2182                         substream->ops->hw_free(substream);
2183                 substream->ops->close(substream);
2184                 substream->hw_opened = 0;
2185         }
2186         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2187                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2188         if (substream->pcm_release) {
2189                 substream->pcm_release(substream);
2190                 substream->pcm_release = NULL;
2191         }
2192         snd_pcm_detach_substream(substream);
2193 }
2194
2195 EXPORT_SYMBOL(snd_pcm_release_substream);
2196
2197 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2198                            struct file *file,
2199                            struct snd_pcm_substream **rsubstream)
2200 {
2201         struct snd_pcm_substream *substream;
2202         int err;
2203
2204         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2205         if (err < 0)
2206                 return err;
2207         if (substream->ref_count > 1) {
2208                 *rsubstream = substream;
2209                 return 0;
2210         }
2211
2212         err = snd_pcm_hw_constraints_init(substream);
2213         if (err < 0) {
2214                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2215                 goto error;
2216         }
2217
2218         if ((err = substream->ops->open(substream)) < 0)
2219                 goto error;
2220
2221         substream->hw_opened = 1;
2222
2223         err = snd_pcm_hw_constraints_complete(substream);
2224         if (err < 0) {
2225                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2226                 goto error;
2227         }
2228
2229         *rsubstream = substream;
2230         return 0;
2231
2232  error:
2233         snd_pcm_release_substream(substream);
2234         return err;
2235 }
2236
2237 EXPORT_SYMBOL(snd_pcm_open_substream);
2238
2239 static int snd_pcm_open_file(struct file *file,
2240                              struct snd_pcm *pcm,
2241                              int stream)
2242 {
2243         struct snd_pcm_file *pcm_file;
2244         struct snd_pcm_substream *substream;
2245         int err;
2246
2247         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2248         if (err < 0)
2249                 return err;
2250
2251         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2252         if (pcm_file == NULL) {
2253                 snd_pcm_release_substream(substream);
2254                 return -ENOMEM;
2255         }
2256         pcm_file->substream = substream;
2257         if (substream->ref_count == 1) {
2258                 substream->file = pcm_file;
2259                 substream->pcm_release = pcm_release_private;
2260         }
2261         file->private_data = pcm_file;
2262
2263         return 0;
2264 }
2265
2266 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2267 {
2268         struct snd_pcm *pcm;
2269         int err = nonseekable_open(inode, file);
2270         if (err < 0)
2271                 return err;
2272         pcm = snd_lookup_minor_data(iminor(inode),
2273                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2274         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2275         if (pcm)
2276                 snd_card_unref(pcm->card);
2277         return err;
2278 }
2279
2280 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2281 {
2282         struct snd_pcm *pcm;
2283         int err = nonseekable_open(inode, file);
2284         if (err < 0)
2285                 return err;
2286         pcm = snd_lookup_minor_data(iminor(inode),
2287                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2288         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2289         if (pcm)
2290                 snd_card_unref(pcm->card);
2291         return err;
2292 }
2293
2294 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2295 {
2296         int err;
2297         wait_queue_t wait;
2298
2299         if (pcm == NULL) {
2300                 err = -ENODEV;
2301                 goto __error1;
2302         }
2303         err = snd_card_file_add(pcm->card, file);
2304         if (err < 0)
2305                 goto __error1;
2306         if (!try_module_get(pcm->card->module)) {
2307                 err = -EFAULT;
2308                 goto __error2;
2309         }
2310         init_waitqueue_entry(&wait, current);
2311         add_wait_queue(&pcm->open_wait, &wait);
2312         mutex_lock(&pcm->open_mutex);
2313         while (1) {
2314                 err = snd_pcm_open_file(file, pcm, stream);
2315                 if (err >= 0)
2316                         break;
2317                 if (err == -EAGAIN) {
2318                         if (file->f_flags & O_NONBLOCK) {
2319                                 err = -EBUSY;
2320                                 break;
2321                         }
2322                 } else
2323                         break;
2324                 set_current_state(TASK_INTERRUPTIBLE);
2325                 mutex_unlock(&pcm->open_mutex);
2326                 schedule();
2327                 mutex_lock(&pcm->open_mutex);
2328                 if (pcm->card->shutdown) {
2329                         err = -ENODEV;
2330                         break;
2331                 }
2332                 if (signal_pending(current)) {
2333                         err = -ERESTARTSYS;
2334                         break;
2335                 }
2336         }
2337         remove_wait_queue(&pcm->open_wait, &wait);
2338         mutex_unlock(&pcm->open_mutex);
2339         if (err < 0)
2340                 goto __error;
2341         return err;
2342
2343       __error:
2344         module_put(pcm->card->module);
2345       __error2:
2346         snd_card_file_remove(pcm->card, file);
2347       __error1:
2348         return err;
2349 }
2350
2351 static int snd_pcm_release(struct inode *inode, struct file *file)
2352 {
2353         struct snd_pcm *pcm;
2354         struct snd_pcm_substream *substream;
2355         struct snd_pcm_file *pcm_file;
2356
2357         pcm_file = file->private_data;
2358         substream = pcm_file->substream;
2359         if (snd_BUG_ON(!substream))
2360                 return -ENXIO;
2361         pcm = substream->pcm;
2362         mutex_lock(&pcm->open_mutex);
2363         snd_pcm_release_substream(substream);
2364         kfree(pcm_file);
2365         mutex_unlock(&pcm->open_mutex);
2366         wake_up(&pcm->open_wait);
2367         module_put(pcm->card->module);
2368         snd_card_file_remove(pcm->card, file);
2369         return 0;
2370 }
2371
2372 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2373                                                  snd_pcm_uframes_t frames)
2374 {
2375         struct snd_pcm_runtime *runtime = substream->runtime;
2376         snd_pcm_sframes_t appl_ptr;
2377         snd_pcm_sframes_t ret;
2378         snd_pcm_sframes_t hw_avail;
2379
2380         if (frames == 0)
2381                 return 0;
2382
2383         snd_pcm_stream_lock_irq(substream);
2384         switch (runtime->status->state) {
2385         case SNDRV_PCM_STATE_PREPARED:
2386                 break;
2387         case SNDRV_PCM_STATE_DRAINING:
2388         case SNDRV_PCM_STATE_RUNNING:
2389                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2390                         break;
2391                 /* Fall through */
2392         case SNDRV_PCM_STATE_XRUN:
2393                 ret = -EPIPE;
2394                 goto __end;
2395         case SNDRV_PCM_STATE_SUSPENDED:
2396                 ret = -ESTRPIPE;
2397                 goto __end;
2398         default:
2399                 ret = -EBADFD;
2400                 goto __end;
2401         }
2402
2403         hw_avail = snd_pcm_playback_hw_avail(runtime);
2404         if (hw_avail <= 0) {
2405                 ret = 0;
2406                 goto __end;
2407         }
2408         if (frames > (snd_pcm_uframes_t)hw_avail)
2409                 frames = hw_avail;
2410         appl_ptr = runtime->control->appl_ptr - frames;
2411         if (appl_ptr < 0)
2412                 appl_ptr += runtime->boundary;
2413         runtime->control->appl_ptr = appl_ptr;
2414         ret = frames;
2415  __end:
2416         snd_pcm_stream_unlock_irq(substream);
2417         return ret;
2418 }
2419
2420 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2421                                                 snd_pcm_uframes_t frames)
2422 {
2423         struct snd_pcm_runtime *runtime = substream->runtime;
2424         snd_pcm_sframes_t appl_ptr;
2425         snd_pcm_sframes_t ret;
2426         snd_pcm_sframes_t hw_avail;
2427
2428         if (frames == 0)
2429                 return 0;
2430
2431         snd_pcm_stream_lock_irq(substream);
2432         switch (runtime->status->state) {
2433         case SNDRV_PCM_STATE_PREPARED:
2434         case SNDRV_PCM_STATE_DRAINING:
2435                 break;
2436         case SNDRV_PCM_STATE_RUNNING:
2437                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2438                         break;
2439                 /* Fall through */
2440         case SNDRV_PCM_STATE_XRUN:
2441                 ret = -EPIPE;
2442                 goto __end;
2443         case SNDRV_PCM_STATE_SUSPENDED:
2444                 ret = -ESTRPIPE;
2445                 goto __end;
2446         default:
2447                 ret = -EBADFD;
2448                 goto __end;
2449         }
2450
2451         hw_avail = snd_pcm_capture_hw_avail(runtime);
2452         if (hw_avail <= 0) {
2453                 ret = 0;
2454                 goto __end;
2455         }
2456         if (frames > (snd_pcm_uframes_t)hw_avail)
2457                 frames = hw_avail;
2458         appl_ptr = runtime->control->appl_ptr - frames;
2459         if (appl_ptr < 0)
2460                 appl_ptr += runtime->boundary;
2461         runtime->control->appl_ptr = appl_ptr;
2462         ret = frames;
2463  __end:
2464         snd_pcm_stream_unlock_irq(substream);
2465         return ret;
2466 }
2467
2468 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2469                                                   snd_pcm_uframes_t frames)
2470 {
2471         struct snd_pcm_runtime *runtime = substream->runtime;
2472         snd_pcm_sframes_t appl_ptr;
2473         snd_pcm_sframes_t ret;
2474         snd_pcm_sframes_t avail;
2475
2476         if (frames == 0)
2477                 return 0;
2478
2479         snd_pcm_stream_lock_irq(substream);
2480         switch (runtime->status->state) {
2481         case SNDRV_PCM_STATE_PREPARED:
2482         case SNDRV_PCM_STATE_PAUSED:
2483                 break;
2484         case SNDRV_PCM_STATE_DRAINING:
2485         case SNDRV_PCM_STATE_RUNNING:
2486                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2487                         break;
2488                 /* Fall through */
2489         case SNDRV_PCM_STATE_XRUN:
2490                 ret = -EPIPE;
2491                 goto __end;
2492         case SNDRV_PCM_STATE_SUSPENDED:
2493                 ret = -ESTRPIPE;
2494                 goto __end;
2495         default:
2496                 ret = -EBADFD;
2497                 goto __end;
2498         }
2499
2500         avail = snd_pcm_playback_avail(runtime);
2501         if (avail <= 0) {
2502                 ret = 0;
2503                 goto __end;
2504         }
2505         if (frames > (snd_pcm_uframes_t)avail)
2506                 frames = avail;
2507         appl_ptr = runtime->control->appl_ptr + frames;
2508         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2509                 appl_ptr -= runtime->boundary;
2510         runtime->control->appl_ptr = appl_ptr;
2511         ret = frames;
2512  __end:
2513         snd_pcm_stream_unlock_irq(substream);
2514         return ret;
2515 }
2516
2517 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2518                                                  snd_pcm_uframes_t frames)
2519 {
2520         struct snd_pcm_runtime *runtime = substream->runtime;
2521         snd_pcm_sframes_t appl_ptr;
2522         snd_pcm_sframes_t ret;
2523         snd_pcm_sframes_t avail;
2524
2525         if (frames == 0)
2526                 return 0;
2527
2528         snd_pcm_stream_lock_irq(substream);
2529         switch (runtime->status->state) {
2530         case SNDRV_PCM_STATE_PREPARED:
2531         case SNDRV_PCM_STATE_DRAINING:
2532         case SNDRV_PCM_STATE_PAUSED:
2533                 break;
2534         case SNDRV_PCM_STATE_RUNNING:
2535                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2536                         break;
2537                 /* Fall through */
2538         case SNDRV_PCM_STATE_XRUN:
2539                 ret = -EPIPE;
2540                 goto __end;
2541         case SNDRV_PCM_STATE_SUSPENDED:
2542                 ret = -ESTRPIPE;
2543                 goto __end;
2544         default:
2545                 ret = -EBADFD;
2546                 goto __end;
2547         }
2548
2549         avail = snd_pcm_capture_avail(runtime);
2550         if (avail <= 0) {
2551                 ret = 0;
2552                 goto __end;
2553         }
2554         if (frames > (snd_pcm_uframes_t)avail)
2555                 frames = avail;
2556         appl_ptr = runtime->control->appl_ptr + frames;
2557         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2558                 appl_ptr -= runtime->boundary;
2559         runtime->control->appl_ptr = appl_ptr;
2560         ret = frames;
2561  __end:
2562         snd_pcm_stream_unlock_irq(substream);
2563         return ret;
2564 }
2565
2566 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2567 {
2568         struct snd_pcm_runtime *runtime = substream->runtime;
2569         int err;
2570
2571         snd_pcm_stream_lock_irq(substream);
2572         switch (runtime->status->state) {
2573         case SNDRV_PCM_STATE_DRAINING:
2574                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2575                         goto __badfd;
2576                 /* Fall through */
2577         case SNDRV_PCM_STATE_RUNNING:
2578                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2579                         break;
2580                 /* Fall through */
2581         case SNDRV_PCM_STATE_PREPARED:
2582         case SNDRV_PCM_STATE_SUSPENDED:
2583                 err = 0;
2584                 break;
2585         case SNDRV_PCM_STATE_XRUN:
2586                 err = -EPIPE;
2587                 break;
2588         default:
2589               __badfd:
2590                 err = -EBADFD;
2591                 break;
2592         }
2593         snd_pcm_stream_unlock_irq(substream);
2594         return err;
2595 }
2596
2597 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2598                          snd_pcm_sframes_t __user *res)
2599 {
2600         struct snd_pcm_runtime *runtime = substream->runtime;
2601         int err;
2602         snd_pcm_sframes_t n = 0;
2603
2604         snd_pcm_stream_lock_irq(substream);
2605         switch (runtime->status->state) {
2606         case SNDRV_PCM_STATE_DRAINING:
2607                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2608                         goto __badfd;
2609                 /* Fall through */
2610         case SNDRV_PCM_STATE_RUNNING:
2611                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2612                         break;
2613                 /* Fall through */
2614         case SNDRV_PCM_STATE_PREPARED:
2615         case SNDRV_PCM_STATE_SUSPENDED:
2616                 err = 0;
2617                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2618                         n = snd_pcm_playback_hw_avail(runtime);
2619                 else
2620                         n = snd_pcm_capture_avail(runtime);
2621                 n += runtime->delay;
2622                 break;
2623         case SNDRV_PCM_STATE_XRUN:
2624                 err = -EPIPE;
2625                 break;
2626         default:
2627               __badfd:
2628                 err = -EBADFD;
2629                 break;
2630         }
2631         snd_pcm_stream_unlock_irq(substream);
2632         if (!err)
2633                 if (put_user(n, res))
2634                         err = -EFAULT;
2635         return err;
2636 }
2637
2638 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2639                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2640 {
2641         struct snd_pcm_runtime *runtime = substream->runtime;
2642         struct snd_pcm_sync_ptr sync_ptr;
2643         volatile struct snd_pcm_mmap_status *status;
2644         volatile struct snd_pcm_mmap_control *control;
2645         int err;
2646
2647         memset(&sync_ptr, 0, sizeof(sync_ptr));
2648         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2649                 return -EFAULT;
2650         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2651                 return -EFAULT;
2652         status = runtime->status;
2653         control = runtime->control;
2654         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2655                 err = snd_pcm_hwsync(substream);
2656                 if (err < 0)
2657                         return err;
2658         }
2659         snd_pcm_stream_lock_irq(substream);
2660         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2661                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2662         else
2663                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2664         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2665                 control->avail_min = sync_ptr.c.control.avail_min;
2666         else
2667                 sync_ptr.c.control.avail_min = control->avail_min;
2668         sync_ptr.s.status.state = status->state;
2669         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2670         sync_ptr.s.status.tstamp = status->tstamp;
2671         sync_ptr.s.status.suspended_state = status->suspended_state;
2672         snd_pcm_stream_unlock_irq(substream);
2673         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2674                 return -EFAULT;
2675         return 0;
2676 }
2677
2678 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2679 {
2680         struct snd_pcm_runtime *runtime = substream->runtime;
2681         int arg;
2682
2683         if (get_user(arg, _arg))
2684                 return -EFAULT;
2685         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2686                 return -EINVAL;
2687         runtime->tstamp_type = arg;
2688         return 0;
2689 }
2690
2691 static int snd_pcm_common_ioctl1(struct file *file,
2692                                  struct snd_pcm_substream *substream,
2693                                  unsigned int cmd, void __user *arg)
2694 {
2695         switch (cmd) {
2696         case SNDRV_PCM_IOCTL_PVERSION:
2697                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2698         case SNDRV_PCM_IOCTL_INFO:
2699                 return snd_pcm_info_user(substream, arg);
2700         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2701                 return 0;
2702         case SNDRV_PCM_IOCTL_TTSTAMP:
2703                 return snd_pcm_tstamp(substream, arg);
2704         case SNDRV_PCM_IOCTL_HW_REFINE:
2705                 return snd_pcm_hw_refine_user(substream, arg);
2706         case SNDRV_PCM_IOCTL_HW_PARAMS:
2707                 return snd_pcm_hw_params_user(substream, arg);
2708         case SNDRV_PCM_IOCTL_HW_FREE:
2709                 return snd_pcm_hw_free(substream);
2710         case SNDRV_PCM_IOCTL_SW_PARAMS:
2711                 return snd_pcm_sw_params_user(substream, arg);
2712         case SNDRV_PCM_IOCTL_STATUS:
2713                 return snd_pcm_status_user(substream, arg);
2714         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2715                 return snd_pcm_channel_info_user(substream, arg);
2716         case SNDRV_PCM_IOCTL_PREPARE:
2717                 return snd_pcm_prepare(substream, file);
2718         case SNDRV_PCM_IOCTL_RESET:
2719                 return snd_pcm_reset(substream);
2720         case SNDRV_PCM_IOCTL_START:
2721                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2722         case SNDRV_PCM_IOCTL_LINK:
2723                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2724         case SNDRV_PCM_IOCTL_UNLINK:
2725                 return snd_pcm_unlink(substream);
2726         case SNDRV_PCM_IOCTL_RESUME:
2727                 return snd_pcm_resume(substream);
2728         case SNDRV_PCM_IOCTL_XRUN:
2729                 return snd_pcm_xrun(substream);
2730         case SNDRV_PCM_IOCTL_HWSYNC:
2731                 return snd_pcm_hwsync(substream);
2732         case SNDRV_PCM_IOCTL_DELAY:
2733                 return snd_pcm_delay(substream, arg);
2734         case SNDRV_PCM_IOCTL_SYNC_PTR:
2735                 return snd_pcm_sync_ptr(substream, arg);
2736 #ifdef CONFIG_SND_SUPPORT_OLD_API
2737         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2738                 return snd_pcm_hw_refine_old_user(substream, arg);
2739         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2740                 return snd_pcm_hw_params_old_user(substream, arg);
2741 #endif
2742         case SNDRV_PCM_IOCTL_DRAIN:
2743                 return snd_pcm_drain(substream, file);
2744         case SNDRV_PCM_IOCTL_DROP:
2745                 return snd_pcm_drop(substream);
2746         case SNDRV_PCM_IOCTL_PAUSE:
2747         {
2748                 int res;
2749                 snd_pcm_stream_lock_irq(substream);
2750                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2751                 snd_pcm_stream_unlock_irq(substream);
2752                 return res;
2753         }
2754         }
2755         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2756         return -ENOTTY;
2757 }
2758
2759 static int snd_pcm_playback_ioctl1(struct file *file,
2760                                    struct snd_pcm_substream *substream,
2761                                    unsigned int cmd, void __user *arg)
2762 {
2763         if (snd_BUG_ON(!substream))
2764                 return -ENXIO;
2765         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2766                 return -EINVAL;
2767         switch (cmd) {
2768         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2769         {
2770                 struct snd_xferi xferi;
2771                 struct snd_xferi __user *_xferi = arg;
2772                 struct snd_pcm_runtime *runtime = substream->runtime;
2773                 snd_pcm_sframes_t result;
2774                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2775                         return -EBADFD;
2776                 if (put_user(0, &_xferi->result))
2777                         return -EFAULT;
2778                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2779                         return -EFAULT;
2780                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2781                 __put_user(result, &_xferi->result);
2782                 return result < 0 ? result : 0;
2783         }
2784         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2785         {
2786                 struct snd_xfern xfern;
2787                 struct snd_xfern __user *_xfern = arg;
2788                 struct snd_pcm_runtime *runtime = substream->runtime;
2789                 void __user **bufs;
2790                 snd_pcm_sframes_t result;
2791                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2792                         return -EBADFD;
2793                 if (runtime->channels > 128)
2794                         return -EINVAL;
2795                 if (put_user(0, &_xfern->result))
2796                         return -EFAULT;
2797                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2798                         return -EFAULT;
2799
2800                 bufs = memdup_user(xfern.bufs,
2801                                    sizeof(void *) * runtime->channels);
2802                 if (IS_ERR(bufs))
2803                         return PTR_ERR(bufs);
2804                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2805                 kfree(bufs);
2806                 __put_user(result, &_xfern->result);
2807                 return result < 0 ? result : 0;
2808         }
2809         case SNDRV_PCM_IOCTL_REWIND:
2810         {
2811                 snd_pcm_uframes_t frames;
2812                 snd_pcm_uframes_t __user *_frames = arg;
2813                 snd_pcm_sframes_t result;
2814                 if (get_user(frames, _frames))
2815                         return -EFAULT;
2816                 if (put_user(0, _frames))
2817                         return -EFAULT;
2818                 result = snd_pcm_playback_rewind(substream, frames);
2819                 __put_user(result, _frames);
2820                 return result < 0 ? result : 0;
2821         }
2822         case SNDRV_PCM_IOCTL_FORWARD:
2823         {
2824                 snd_pcm_uframes_t frames;
2825                 snd_pcm_uframes_t __user *_frames = arg;
2826                 snd_pcm_sframes_t result;
2827                 if (get_user(frames, _frames))
2828                         return -EFAULT;
2829                 if (put_user(0, _frames))
2830                         return -EFAULT;
2831                 result = snd_pcm_playback_forward(substream, frames);
2832                 __put_user(result, _frames);
2833                 return result < 0 ? result : 0;
2834         }
2835         }
2836         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2837 }
2838
2839 static int snd_pcm_capture_ioctl1(struct file *file,
2840                                   struct snd_pcm_substream *substream,
2841                                   unsigned int cmd, void __user *arg)
2842 {
2843         if (snd_BUG_ON(!substream))
2844                 return -ENXIO;
2845         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2846                 return -EINVAL;
2847         switch (cmd) {
2848         case SNDRV_PCM_IOCTL_READI_FRAMES:
2849         {
2850                 struct snd_xferi xferi;
2851                 struct snd_xferi __user *_xferi = arg;
2852                 struct snd_pcm_runtime *runtime = substream->runtime;
2853                 snd_pcm_sframes_t result;
2854                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2855                         return -EBADFD;
2856                 if (put_user(0, &_xferi->result))
2857                         return -EFAULT;
2858                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2859                         return -EFAULT;
2860                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2861                 __put_user(result, &_xferi->result);
2862                 return result < 0 ? result : 0;
2863         }
2864         case SNDRV_PCM_IOCTL_READN_FRAMES:
2865         {
2866                 struct snd_xfern xfern;
2867                 struct snd_xfern __user *_xfern = arg;
2868                 struct snd_pcm_runtime *runtime = substream->runtime;
2869                 void *bufs;
2870                 snd_pcm_sframes_t result;
2871                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2872                         return -EBADFD;
2873                 if (runtime->channels > 128)
2874                         return -EINVAL;
2875                 if (put_user(0, &_xfern->result))
2876                         return -EFAULT;
2877                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2878                         return -EFAULT;
2879
2880                 bufs = memdup_user(xfern.bufs,
2881                                    sizeof(void *) * runtime->channels);
2882                 if (IS_ERR(bufs))
2883                         return PTR_ERR(bufs);
2884                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2885                 kfree(bufs);
2886                 __put_user(result, &_xfern->result);
2887                 return result < 0 ? result : 0;
2888         }
2889         case SNDRV_PCM_IOCTL_REWIND:
2890         {
2891                 snd_pcm_uframes_t frames;
2892                 snd_pcm_uframes_t __user *_frames = arg;
2893                 snd_pcm_sframes_t result;
2894                 if (get_user(frames, _frames))
2895                         return -EFAULT;
2896                 if (put_user(0, _frames))
2897                         return -EFAULT;
2898                 result = snd_pcm_capture_rewind(substream, frames);
2899                 __put_user(result, _frames);
2900                 return result < 0 ? result : 0;
2901         }
2902         case SNDRV_PCM_IOCTL_FORWARD:
2903         {
2904                 snd_pcm_uframes_t frames;
2905                 snd_pcm_uframes_t __user *_frames = arg;
2906                 snd_pcm_sframes_t result;
2907                 if (get_user(frames, _frames))
2908                         return -EFAULT;
2909                 if (put_user(0, _frames))
2910                         return -EFAULT;
2911                 result = snd_pcm_capture_forward(substream, frames);
2912                 __put_user(result, _frames);
2913                 return result < 0 ? result : 0;
2914         }
2915         }
2916         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2917 }
2918
2919 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2920                                    unsigned long arg)
2921 {
2922         struct snd_pcm_file *pcm_file;
2923
2924         pcm_file = file->private_data;
2925
2926         if (((cmd >> 8) & 0xff) != 'A')
2927                 return -ENOTTY;
2928
2929         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2930                                        (void __user *)arg);
2931 }
2932
2933 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2934                                   unsigned long arg)
2935 {
2936         struct snd_pcm_file *pcm_file;
2937
2938         pcm_file = file->private_data;
2939
2940         if (((cmd >> 8) & 0xff) != 'A')
2941                 return -ENOTTY;
2942
2943         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2944                                       (void __user *)arg);
2945 }
2946
2947 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2948                          unsigned int cmd, void *arg)
2949 {
2950         mm_segment_t fs;
2951         int result;
2952
2953         fs = snd_enter_user();
2954         switch (substream->stream) {
2955         case SNDRV_PCM_STREAM_PLAYBACK:
2956                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2957                                                  (void __user *)arg);
2958                 break;
2959         case SNDRV_PCM_STREAM_CAPTURE:
2960                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2961                                                 (void __user *)arg);
2962                 break;
2963         default:
2964                 result = -EINVAL;
2965                 break;
2966         }
2967         snd_leave_user(fs);
2968         return result;
2969 }
2970
2971 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2972
2973 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2974                             loff_t * offset)
2975 {
2976         struct snd_pcm_file *pcm_file;
2977         struct snd_pcm_substream *substream;
2978         struct snd_pcm_runtime *runtime;
2979         snd_pcm_sframes_t result;
2980
2981         pcm_file = file->private_data;
2982         substream = pcm_file->substream;
2983         if (PCM_RUNTIME_CHECK(substream))
2984                 return -ENXIO;
2985         runtime = substream->runtime;
2986         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2987                 return -EBADFD;
2988         if (!frame_aligned(runtime, count))
2989                 return -EINVAL;
2990         count = bytes_to_frames(runtime, count);
2991         result = snd_pcm_lib_read(substream, buf, count);
2992         if (result > 0)
2993                 result = frames_to_bytes(runtime, result);
2994         return result;
2995 }
2996
2997 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2998                              size_t count, loff_t * offset)
2999 {
3000         struct snd_pcm_file *pcm_file;
3001         struct snd_pcm_substream *substream;
3002         struct snd_pcm_runtime *runtime;
3003         snd_pcm_sframes_t result;
3004
3005         pcm_file = file->private_data;
3006         substream = pcm_file->substream;
3007         if (PCM_RUNTIME_CHECK(substream))
3008                 return -ENXIO;
3009         runtime = substream->runtime;
3010         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3011                 return -EBADFD;
3012         if (!frame_aligned(runtime, count))
3013                 return -EINVAL;
3014         count = bytes_to_frames(runtime, count);
3015         result = snd_pcm_lib_write(substream, buf, count);
3016         if (result > 0)
3017                 result = frames_to_bytes(runtime, result);
3018         return result;
3019 }
3020
3021 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3022                              unsigned long nr_segs, loff_t pos)
3023
3024 {
3025         struct snd_pcm_file *pcm_file;
3026         struct snd_pcm_substream *substream;
3027         struct snd_pcm_runtime *runtime;
3028         snd_pcm_sframes_t result;
3029         unsigned long i;
3030         void __user **bufs;
3031         snd_pcm_uframes_t frames;
3032
3033         pcm_file = iocb->ki_filp->private_data;
3034         substream = pcm_file->substream;
3035         if (PCM_RUNTIME_CHECK(substream))
3036                 return -ENXIO;
3037         runtime = substream->runtime;
3038         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3039                 return -EBADFD;
3040         if (nr_segs > 1024 || nr_segs != runtime->channels)
3041                 return -EINVAL;
3042         if (!frame_aligned(runtime, iov->iov_len))
3043                 return -EINVAL;
3044         frames = bytes_to_samples(runtime, iov->iov_len);
3045         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3046         if (bufs == NULL)
3047                 return -ENOMEM;
3048         for (i = 0; i < nr_segs; ++i)
3049                 bufs[i] = iov[i].iov_base;
3050         result = snd_pcm_lib_readv(substream, bufs, frames);
3051         if (result > 0)
3052                 result = frames_to_bytes(runtime, result);
3053         kfree(bufs);
3054         return result;
3055 }
3056
3057 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3058                               unsigned long nr_segs, loff_t pos)
3059 {
3060         struct snd_pcm_file *pcm_file;
3061         struct snd_pcm_substream *substream;
3062         struct snd_pcm_runtime *runtime;
3063         snd_pcm_sframes_t result;
3064         unsigned long i;
3065         void __user **bufs;
3066         snd_pcm_uframes_t frames;
3067
3068         pcm_file = iocb->ki_filp->private_data;
3069         substream = pcm_file->substream;
3070         if (PCM_RUNTIME_CHECK(substream))
3071                 return -ENXIO;
3072         runtime = substream->runtime;
3073         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3074                 return -EBADFD;
3075         if (nr_segs > 128 || nr_segs != runtime->channels ||
3076             !frame_aligned(runtime, iov->iov_len))
3077                 return -EINVAL;
3078         frames = bytes_to_samples(runtime, iov->iov_len);
3079         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3080         if (bufs == NULL)
3081                 return -ENOMEM;
3082         for (i = 0; i < nr_segs; ++i)
3083                 bufs[i] = iov[i].iov_base;
3084         result = snd_pcm_lib_writev(substream, bufs, frames);
3085         if (result > 0)
3086                 result = frames_to_bytes(runtime, result);
3087         kfree(bufs);
3088         return result;
3089 }
3090
3091 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3092 {
3093         struct snd_pcm_file *pcm_file;
3094         struct snd_pcm_substream *substream;
3095         struct snd_pcm_runtime *runtime;
3096         unsigned int mask;
3097         snd_pcm_uframes_t avail;
3098
3099         pcm_file = file->private_data;
3100
3101         substream = pcm_file->substream;
3102         if (PCM_RUNTIME_CHECK(substream))
3103                 return -ENXIO;
3104         runtime = substream->runtime;
3105
3106         poll_wait(file, &runtime->sleep, wait);
3107
3108         snd_pcm_stream_lock_irq(substream);
3109         avail = snd_pcm_playback_avail(runtime);
3110         switch (runtime->status->state) {
3111         case SNDRV_PCM_STATE_RUNNING:
3112         case SNDRV_PCM_STATE_PREPARED:
3113         case SNDRV_PCM_STATE_PAUSED:
3114                 if (avail >= runtime->control->avail_min) {
3115                         mask = POLLOUT | POLLWRNORM;
3116                         break;
3117                 }
3118                 /* Fall through */
3119         case SNDRV_PCM_STATE_DRAINING:
3120                 mask = 0;
3121                 break;
3122         default:
3123                 mask = POLLOUT | POLLWRNORM | POLLERR;
3124                 break;
3125         }
3126         snd_pcm_stream_unlock_irq(substream);
3127         return mask;
3128 }
3129
3130 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3131 {
3132         struct snd_pcm_file *pcm_file;
3133         struct snd_pcm_substream *substream;
3134         struct snd_pcm_runtime *runtime;
3135         unsigned int mask;
3136         snd_pcm_uframes_t avail;
3137
3138         pcm_file = file->private_data;
3139
3140         substream = pcm_file->substream;
3141         if (PCM_RUNTIME_CHECK(substream))
3142                 return -ENXIO;
3143         runtime = substream->runtime;
3144
3145         poll_wait(file, &runtime->sleep, wait);
3146
3147         snd_pcm_stream_lock_irq(substream);
3148         avail = snd_pcm_capture_avail(runtime);
3149         switch (runtime->status->state) {
3150         case SNDRV_PCM_STATE_RUNNING:
3151         case SNDRV_PCM_STATE_PREPARED:
3152         case SNDRV_PCM_STATE_PAUSED:
3153                 if (avail >= runtime->control->avail_min) {
3154                         mask = POLLIN | POLLRDNORM;
3155                         break;
3156                 }
3157                 mask = 0;
3158                 break;
3159         case SNDRV_PCM_STATE_DRAINING:
3160                 if (avail > 0) {
3161                         mask = POLLIN | POLLRDNORM;
3162                         break;
3163                 }
3164                 /* Fall through */
3165         default:
3166                 mask = POLLIN | POLLRDNORM | POLLERR;
3167                 break;
3168         }
3169         snd_pcm_stream_unlock_irq(substream);
3170         return mask;
3171 }
3172
3173 /*
3174  * mmap support
3175  */
3176
3177 /*
3178  * Only on coherent architectures, we can mmap the status and the control records
3179  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3180  */
3181 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3182 /*
3183  * mmap status record
3184  */
3185 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3186                                                 struct vm_fault *vmf)
3187 {
3188         struct snd_pcm_substream *substream = area->vm_private_data;
3189         struct snd_pcm_runtime *runtime;
3190
3191         if (substream == NULL)
3192                 return VM_FAULT_SIGBUS;
3193         runtime = substream->runtime;
3194         vmf->page = virt_to_page(runtime->status);
3195         get_page(vmf->page);
3196         return 0;
3197 }
3198
3199 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3200 {
3201         .fault =        snd_pcm_mmap_status_fault,
3202 };
3203
3204 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3205                                struct vm_area_struct *area)
3206 {
3207         long size;
3208         if (!(area->vm_flags & VM_READ))
3209                 return -EINVAL;
3210         size = area->vm_end - area->vm_start;
3211         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3212                 return -EINVAL;
3213         area->vm_ops = &snd_pcm_vm_ops_status;
3214         area->vm_private_data = substream;
3215         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3216         return 0;
3217 }
3218
3219 /*
3220  * mmap control record
3221  */
3222 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3223                                                 struct vm_fault *vmf)
3224 {
3225         struct snd_pcm_substream *substream = area->vm_private_data;
3226         struct snd_pcm_runtime *runtime;
3227
3228         if (substream == NULL)
3229                 return VM_FAULT_SIGBUS;
3230         runtime = substream->runtime;
3231         vmf->page = virt_to_page(runtime->control);
3232         get_page(vmf->page);
3233         return 0;
3234 }
3235
3236 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3237 {
3238         .fault =        snd_pcm_mmap_control_fault,
3239 };
3240
3241 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3242                                 struct vm_area_struct *area)
3243 {
3244         long size;
3245         if (!(area->vm_flags & VM_READ))
3246                 return -EINVAL;
3247         size = area->vm_end - area->vm_start;
3248         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3249                 return -EINVAL;
3250         area->vm_ops = &snd_pcm_vm_ops_control;
3251         area->vm_private_data = substream;
3252         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3253         return 0;
3254 }
3255 #else /* ! coherent mmap */
3256 /*
3257  * don't support mmap for status and control records.
3258  */
3259 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3260                                struct vm_area_struct *area)
3261 {
3262         return -ENXIO;
3263 }
3264 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3265                                 struct vm_area_struct *area)
3266 {
3267         return -ENXIO;
3268 }
3269 #endif /* coherent mmap */
3270
3271 static inline struct page *
3272 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3273 {
3274         void *vaddr = substream->runtime->dma_area + ofs;
3275         return virt_to_page(vaddr);
3276 }
3277
3278 /*
3279  * fault callback for mmapping a RAM page
3280  */
3281 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3282                                                 struct vm_fault *vmf)
3283 {
3284         struct snd_pcm_substream *substream = area->vm_private_data;
3285         struct snd_pcm_runtime *runtime;
3286         unsigned long offset;
3287         struct page * page;
3288         size_t dma_bytes;
3289
3290         if (substream == NULL)
3291                 return VM_FAULT_SIGBUS;
3292         runtime = substream->runtime;
3293         offset = vmf->pgoff << PAGE_SHIFT;
3294         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3295         if (offset > dma_bytes - PAGE_SIZE)
3296                 return VM_FAULT_SIGBUS;
3297         if (substream->ops->page)
3298                 page = substream->ops->page(substream, offset);
3299         else
3300                 page = snd_pcm_default_page_ops(substream, offset);
3301         if (!page)
3302                 return VM_FAULT_SIGBUS;
3303         get_page(page);
3304         vmf->page = page;
3305         return 0;
3306 }
3307
3308 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3309         .open =         snd_pcm_mmap_data_open,
3310         .close =        snd_pcm_mmap_data_close,
3311 };
3312
3313 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3314         .open =         snd_pcm_mmap_data_open,
3315         .close =        snd_pcm_mmap_data_close,
3316         .fault =        snd_pcm_mmap_data_fault,
3317 };
3318
3319 /*
3320  * mmap the DMA buffer on RAM
3321  */
3322
3323 /**
3324  * snd_pcm_lib_default_mmap - Default PCM data mmap function
3325  * @substream: PCM substream
3326  * @area: VMA
3327  *
3328  * This is the default mmap handler for PCM data.  When mmap pcm_ops is NULL,
3329  * this function is invoked implicitly.
3330  */
3331 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3332                              struct vm_area_struct *area)
3333 {
3334         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3335 #ifdef CONFIG_GENERIC_ALLOCATOR
3336         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3337                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3338                 return remap_pfn_range(area, area->vm_start,
3339                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3340                                 area->vm_end - area->vm_start, area->vm_page_prot);
3341         }
3342 #endif /* CONFIG_GENERIC_ALLOCATOR */
3343 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3344         if (!substream->ops->page &&
3345             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3346                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3347                                          area,
3348                                          substream->runtime->dma_area,
3349                                          substream->runtime->dma_addr,
3350                                          area->vm_end - area->vm_start);
3351 #endif /* CONFIG_X86 */
3352         /* mmap with fault handler */
3353         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3354         return 0;
3355 }
3356 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3357
3358 /*
3359  * mmap the DMA buffer on I/O memory area
3360  */
3361 #if SNDRV_PCM_INFO_MMAP_IOMEM
3362 /**
3363  * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3364  * @substream: PCM substream
3365  * @area: VMA
3366  *
3367  * When your hardware uses the iomapped pages as the hardware buffer and
3368  * wants to mmap it, pass this function as mmap pcm_ops.  Note that this
3369  * is supposed to work only on limited architectures.
3370  */
3371 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3372                            struct vm_area_struct *area)
3373 {
3374         struct snd_pcm_runtime *runtime = substream->runtime;;
3375
3376         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3377         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3378 }
3379
3380 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3381 #endif /* SNDRV_PCM_INFO_MMAP */
3382
3383 /*
3384  * mmap DMA buffer
3385  */
3386 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3387                       struct vm_area_struct *area)
3388 {
3389         struct snd_pcm_runtime *runtime;
3390         long size;
3391         unsigned long offset;
3392         size_t dma_bytes;
3393         int err;
3394
3395         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3396                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3397                         return -EINVAL;
3398         } else {
3399                 if (!(area->vm_flags & VM_READ))
3400                         return -EINVAL;
3401         }
3402         runtime = substream->runtime;
3403         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3404                 return -EBADFD;
3405         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3406                 return -ENXIO;
3407         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3408             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3409                 return -EINVAL;
3410         size = area->vm_end - area->vm_start;
3411         offset = area->vm_pgoff << PAGE_SHIFT;
3412         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3413         if ((size_t)size > dma_bytes)
3414                 return -EINVAL;
3415         if (offset > dma_bytes - size)
3416                 return -EINVAL;
3417
3418         area->vm_ops = &snd_pcm_vm_ops_data;
3419         area->vm_private_data = substream;
3420         if (substream->ops->mmap)
3421                 err = substream->ops->mmap(substream, area);
3422         else
3423                 err = snd_pcm_lib_default_mmap(substream, area);
3424         if (!err)
3425                 atomic_inc(&substream->mmap_count);
3426         return err;
3427 }
3428
3429 EXPORT_SYMBOL(snd_pcm_mmap_data);
3430
3431 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3432 {
3433         struct snd_pcm_file * pcm_file;
3434         struct snd_pcm_substream *substream;
3435         unsigned long offset;
3436
3437         pcm_file = file->private_data;
3438         substream = pcm_file->substream;
3439         if (PCM_RUNTIME_CHECK(substream))
3440                 return -ENXIO;
3441
3442         offset = area->vm_pgoff << PAGE_SHIFT;
3443         switch (offset) {
3444         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3445                 if (pcm_file->no_compat_mmap)
3446                         return -ENXIO;
3447                 return snd_pcm_mmap_status(substream, file, area);
3448         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3449                 if (pcm_file->no_compat_mmap)
3450                         return -ENXIO;
3451                 return snd_pcm_mmap_control(substream, file, area);
3452         default:
3453                 return snd_pcm_mmap_data(substream, file, area);
3454         }
3455         return 0;
3456 }
3457
3458 static int snd_pcm_fasync(int fd, struct file * file, int on)
3459 {
3460         struct snd_pcm_file * pcm_file;
3461         struct snd_pcm_substream *substream;
3462         struct snd_pcm_runtime *runtime;
3463
3464         pcm_file = file->private_data;
3465         substream = pcm_file->substream;
3466         if (PCM_RUNTIME_CHECK(substream))
3467                 return -ENXIO;
3468         runtime = substream->runtime;
3469         return fasync_helper(fd, file, on, &runtime->fasync);
3470 }
3471
3472 /*
3473  * ioctl32 compat
3474  */
3475 #ifdef CONFIG_COMPAT
3476 #include "pcm_compat.c"
3477 #else
3478 #define snd_pcm_ioctl_compat    NULL
3479 #endif
3480
3481 /*
3482  *  To be removed helpers to keep binary compatibility
3483  */
3484
3485 #ifdef CONFIG_SND_SUPPORT_OLD_API
3486 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3487 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3488
3489 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3490                                                struct snd_pcm_hw_params_old *oparams)
3491 {
3492         unsigned int i;
3493
3494         memset(params, 0, sizeof(*params));
3495         params->flags = oparams->flags;
3496         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3497                 params->masks[i].bits[0] = oparams->masks[i];
3498         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3499         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3500         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3501         params->info = oparams->info;
3502         params->msbits = oparams->msbits;
3503         params->rate_num = oparams->rate_num;
3504         params->rate_den = oparams->rate_den;
3505         params->fifo_size = oparams->fifo_size;
3506 }
3507
3508 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3509                                              struct snd_pcm_hw_params *params)
3510 {
3511         unsigned int i;
3512
3513         memset(oparams, 0, sizeof(*oparams));
3514         oparams->flags = params->flags;
3515         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3516                 oparams->masks[i] = params->masks[i].bits[0];
3517         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3518         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3519         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3520         oparams->info = params->info;
3521         oparams->msbits = params->msbits;
3522         oparams->rate_num = params->rate_num;
3523         oparams->rate_den = params->rate_den;
3524         oparams->fifo_size = params->fifo_size;
3525 }
3526
3527 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3528                                       struct snd_pcm_hw_params_old __user * _oparams)
3529 {
3530         struct snd_pcm_hw_params *params;
3531         struct snd_pcm_hw_params_old *oparams = NULL;
3532         int err;
3533
3534         params = kmalloc(sizeof(*params), GFP_KERNEL);
3535         if (!params)
3536                 return -ENOMEM;
3537
3538         oparams = memdup_user(_oparams, sizeof(*oparams));
3539         if (IS_ERR(oparams)) {
3540                 err = PTR_ERR(oparams);
3541                 goto out;
3542         }
3543         snd_pcm_hw_convert_from_old_params(params, oparams);
3544         err = snd_pcm_hw_refine(substream, params);
3545         snd_pcm_hw_convert_to_old_params(oparams, params);
3546         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3547                 if (!err)
3548                         err = -EFAULT;
3549         }
3550
3551         kfree(oparams);
3552 out:
3553         kfree(params);
3554         return err;
3555 }
3556
3557 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3558                                       struct snd_pcm_hw_params_old __user * _oparams)
3559 {
3560         struct snd_pcm_hw_params *params;
3561         struct snd_pcm_hw_params_old *oparams = NULL;
3562         int err;
3563
3564         params = kmalloc(sizeof(*params), GFP_KERNEL);
3565         if (!params)
3566                 return -ENOMEM;
3567
3568         oparams = memdup_user(_oparams, sizeof(*oparams));
3569         if (IS_ERR(oparams)) {
3570                 err = PTR_ERR(oparams);
3571                 goto out;
3572         }
3573         snd_pcm_hw_convert_from_old_params(params, oparams);
3574         err = snd_pcm_hw_params(substream, params);
3575         snd_pcm_hw_convert_to_old_params(oparams, params);
3576         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3577                 if (!err)
3578                         err = -EFAULT;
3579         }
3580
3581         kfree(oparams);
3582 out:
3583         kfree(params);
3584         return err;
3585 }
3586 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3587
3588 #ifndef CONFIG_MMU
3589 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3590                                                unsigned long addr,
3591                                                unsigned long len,
3592                                                unsigned long pgoff,
3593                                                unsigned long flags)
3594 {
3595         struct snd_pcm_file *pcm_file = file->private_data;
3596         struct snd_pcm_substream *substream = pcm_file->substream;
3597         struct snd_pcm_runtime *runtime = substream->runtime;
3598         unsigned long offset = pgoff << PAGE_SHIFT;
3599
3600         switch (offset) {
3601         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3602                 return (unsigned long)runtime->status;
3603         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3604                 return (unsigned long)runtime->control;
3605         default:
3606                 return (unsigned long)runtime->dma_area + offset;
3607         }
3608 }
3609 #else
3610 # define snd_pcm_get_unmapped_area NULL
3611 #endif
3612
3613 /*
3614  *  Register section
3615  */
3616
3617 const struct file_operations snd_pcm_f_ops[2] = {
3618         {
3619                 .owner =                THIS_MODULE,
3620                 .write =                snd_pcm_write,
3621                 .aio_write =            snd_pcm_aio_write,
3622                 .open =                 snd_pcm_playback_open,
3623                 .release =              snd_pcm_release,
3624                 .llseek =               no_llseek,
3625                 .poll =                 snd_pcm_playback_poll,
3626                 .unlocked_ioctl =       snd_pcm_playback_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         {
3633                 .owner =                THIS_MODULE,
3634                 .read =                 snd_pcm_read,
3635                 .aio_read =             snd_pcm_aio_read,
3636                 .open =                 snd_pcm_capture_open,
3637                 .release =              snd_pcm_release,
3638                 .llseek =               no_llseek,
3639                 .poll =                 snd_pcm_capture_poll,
3640                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3641                 .compat_ioctl =         snd_pcm_ioctl_compat,
3642                 .mmap =                 snd_pcm_mmap,
3643                 .fasync =               snd_pcm_fasync,
3644                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3645         }
3646 };