sound/core/pcm_compat.c

   1 /*
   2  *   32bit -> 64bit ioctl wrapper for PCM API
   3  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  */
  20
  21 /* This file included from pcm_native.c */
  22
  23 #include <linux/compat.h>
  24 #include <linux/slab.h>
  25
  26 static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
  27                                       s32 __user *src)
  28 {
  29         snd_pcm_sframes_t delay;
  30         mm_segment_t fs;
  31         int err;
  32
  33         fs = snd_enter_user();
  34         err = snd_pcm_delay(substream, &delay);
  35         snd_leave_user(fs);
  36         if (err < 0)
  37                 return err;
  38         if (put_user(delay, src))
  39                 return -EFAULT;
  40         return err;
  41 }
  42
  43 static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
  44                                        u32 __user *src)
  45 {
  46         snd_pcm_uframes_t frames;
  47         int err;
  48
  49         if (get_user(frames, src))
  50                 return -EFAULT;
  51         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  52                 err = snd_pcm_playback_rewind(substream, frames);
  53         else
  54                 err = snd_pcm_capture_rewind(substream, frames);
  55         if (put_user(err, src))
  56                 return -EFAULT;
  57         return err < 0 ? err : 0;
  58 }
  59
  60 static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
  61                                        u32 __user *src)
  62 {
  63         snd_pcm_uframes_t frames;
  64         int err;
  65
  66         if (get_user(frames, src))
  67                 return -EFAULT;
  68         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  69                 err = snd_pcm_playback_forward(substream, frames);
  70         else
  71                 err = snd_pcm_capture_forward(substream, frames);
  72         if (put_user(err, src))
  73                 return -EFAULT;
  74         return err < 0 ? err : 0;
  75 }
  76
  77 struct snd_pcm_hw_params32 {
  78         u32 flags;
  79         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
  80         struct snd_mask mres[5];        /* reserved masks */
  81         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
  82         struct snd_interval ires[9];    /* reserved intervals */
  83         u32 rmask;
  84         u32 cmask;
  85         u32 info;
  86         u32 msbits;
  87         u32 rate_num;
  88         u32 rate_den;
  89         u32 fifo_size;
  90         unsigned char reserved[64];
  91 };
  92
  93 struct snd_pcm_sw_params32 {
  94         s32 tstamp_mode;
  95         u32 period_step;
  96         u32 sleep_min;
  97         u32 avail_min;
  98         u32 xfer_align;
  99         u32 start_threshold;
 100         u32 stop_threshold;
 101         u32 silence_threshold;
 102         u32 silence_size;
 103         u32 boundary;
 104         u32 proto;
 105         u32 tstamp_type;
 106         unsigned char reserved[56];
 107 };
 108
 109 /* recalcuate the boundary within 32bit */
 110 static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
 111 {
 112         snd_pcm_uframes_t boundary;
 113
 114         if (! runtime->buffer_size)
 115                 return 0;
 116         boundary = runtime->buffer_size;
 117         while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
 118                 boundary *= 2;
 119         return boundary;
 120 }
 121
 122 static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
 123                                           struct snd_pcm_sw_params32 __user *src)
 124 {
 125         struct snd_pcm_sw_params params;
 126         snd_pcm_uframes_t boundary;
 127         int err;
 128
 129         memset(&params, 0, sizeof(params));
 130         if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
 131             get_user(params.period_step, &src->period_step) ||
 132             get_user(params.sleep_min, &src->sleep_min) ||
 133             get_user(params.avail_min, &src->avail_min) ||
 134             get_user(params.xfer_align, &src->xfer_align) ||
 135             get_user(params.start_threshold, &src->start_threshold) ||
 136             get_user(params.stop_threshold, &src->stop_threshold) ||
 137             get_user(params.silence_threshold, &src->silence_threshold) ||
 138             get_user(params.silence_size, &src->silence_size) ||
 139             get_user(params.tstamp_type, &src->tstamp_type) ||
 140             get_user(params.proto, &src->proto))
 141                 return -EFAULT;
 142         /*
 143          * Check silent_size parameter.  Since we have 64bit boundary,
 144          * silence_size must be compared with the 32bit boundary.
 145          */
 146         boundary = recalculate_boundary(substream->runtime);
 147         if (boundary && params.silence_size >= boundary)
 148                 params.silence_size = substream->runtime->boundary;
 149         err = snd_pcm_sw_params(substream, &params);
 150         if (err < 0)
 151                 return err;
 152         if (boundary && put_user(boundary, &src->boundary))
 153                 return -EFAULT;
 154         return err;
 155 }
 156
 157 struct snd_pcm_channel_info32 {
 158         u32 channel;
 159         u32 offset;
 160         u32 first;
 161         u32 step;
 162 };
 163
 164 static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
 165                                              struct snd_pcm_channel_info32 __user *src)
 166 {
 167         struct snd_pcm_channel_info info;
 168         int err;
 169
 170         if (get_user(info.channel, &src->channel) ||
 171             get_user(info.offset, &src->offset) ||
 172             get_user(info.first, &src->first) ||
 173             get_user(info.step, &src->step))
 174                 return -EFAULT;
 175         err = snd_pcm_channel_info(substream, &info);
 176         if (err < 0)
 177                 return err;
 178         if (put_user(info.channel, &src->channel) ||
 179             put_user(info.offset, &src->offset) ||
 180             put_user(info.first, &src->first) ||
 181             put_user(info.step, &src->step))
 182                 return -EFAULT;
 183         return err;
 184 }
 185
 186 #ifdef CONFIG_X86_X32
 187 /* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
 188 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 189                                      struct snd_pcm_channel_info __user *src);
 190 #define snd_pcm_ioctl_channel_info_x32(s, p)    \
 191         snd_pcm_channel_info_user(s, p)
 192 #endif /* CONFIG_X86_X32 */
 193
 194 struct snd_pcm_status32 {
 195         s32 state;
 196         struct compat_timespec trigger_tstamp;
 197         struct compat_timespec tstamp;
 198         u32 appl_ptr;
 199         u32 hw_ptr;
 200         s32 delay;
 201         u32 avail;
 202         u32 avail_max;
 203         u32 overrange;
 204         s32 suspended_state;
 205         u32 audio_tstamp_data;
 206         struct compat_timespec audio_tstamp;
 207         struct compat_timespec driver_tstamp;
 208         u32 audio_tstamp_accuracy;
 209         unsigned char reserved[52-2*sizeof(struct compat_timespec)];
 210 } __attribute__((packed));
 211
 212
 213 static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
 214                                       struct snd_pcm_status32 __user *src,
 215                                       bool ext)
 216 {
 217         struct snd_pcm_status status;
 218         int err;
 219
 220         memset(&status, 0, sizeof(status));
 221         /*
 222          * with extension, parameters are read/write,
 223          * get audio_tstamp_data from user,
 224          * ignore rest of status structure
 225          */
 226         if (ext && get_user(status.audio_tstamp_data,
 227                                 (u32 __user *)(&src->audio_tstamp_data)))
 228                 return -EFAULT;
 229         err = snd_pcm_status(substream, &status);
 230         if (err < 0)
 231                 return err;
 232
 233         if (clear_user(src, sizeof(*src)))
 234                 return -EFAULT;
 235         if (put_user(status.state, &src->state) ||
 236             compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 237             compat_put_timespec(&status.tstamp, &src->tstamp) ||
 238             put_user(status.appl_ptr, &src->appl_ptr) ||
 239             put_user(status.hw_ptr, &src->hw_ptr) ||
 240             put_user(status.delay, &src->delay) ||
 241             put_user(status.avail, &src->avail) ||
 242             put_user(status.avail_max, &src->avail_max) ||
 243             put_user(status.overrange, &src->overrange) ||
 244             put_user(status.suspended_state, &src->suspended_state) ||
 245             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 246             compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 247             compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 248             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 249                 return -EFAULT;
 250
 251         return err;
 252 }
 253
 254 #ifdef CONFIG_X86_X32
 255 /* X32 ABI has 64bit timespec and 64bit alignment */
 256 struct snd_pcm_status_x32 {
 257         s32 state;
 258         u32 rsvd; /* alignment */
 259         struct timespec trigger_tstamp;
 260         struct timespec tstamp;
 261         u32 appl_ptr;
 262         u32 hw_ptr;
 263         s32 delay;
 264         u32 avail;
 265         u32 avail_max;
 266         u32 overrange;
 267         s32 suspended_state;
 268         u32 audio_tstamp_data;
 269         struct timespec audio_tstamp;
 270         struct timespec driver_tstamp;
 271         u32 audio_tstamp_accuracy;
 272         unsigned char reserved[52-2*sizeof(struct timespec)];
 273 } __packed;
 274
 275 #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
 276
 277 static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
 278                                    struct snd_pcm_status_x32 __user *src,
 279                                    bool ext)
 280 {
 281         struct snd_pcm_status status;
 282         int err;
 283
 284         memset(&status, 0, sizeof(status));
 285         /*
 286          * with extension, parameters are read/write,
 287          * get audio_tstamp_data from user,
 288          * ignore rest of status structure
 289          */
 290         if (ext && get_user(status.audio_tstamp_data,
 291                                 (u32 __user *)(&src->audio_tstamp_data)))
 292                 return -EFAULT;
 293         err = snd_pcm_status(substream, &status);
 294         if (err < 0)
 295                 return err;
 296
 297         if (clear_user(src, sizeof(*src)))
 298                 return -EFAULT;
 299         if (put_user(status.state, &src->state) ||
 300             put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 301             put_timespec(&status.tstamp, &src->tstamp) ||
 302             put_user(status.appl_ptr, &src->appl_ptr) ||
 303             put_user(status.hw_ptr, &src->hw_ptr) ||
 304             put_user(status.delay, &src->delay) ||
 305             put_user(status.avail, &src->avail) ||
 306             put_user(status.avail_max, &src->avail_max) ||
 307             put_user(status.overrange, &src->overrange) ||
 308             put_user(status.suspended_state, &src->suspended_state) ||
 309             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 310             put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 311             put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 312             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 313                 return -EFAULT;
 314
 315         return err;
 316 }
 317 #endif /* CONFIG_X86_X32 */
 318
 319 /* both for HW_PARAMS and HW_REFINE */
 320 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
 321                                           int refine,
 322                                           struct snd_pcm_hw_params32 __user *data32)
 323 {
 324         struct snd_pcm_hw_params *data;
 325         struct snd_pcm_runtime *runtime;
 326         int err;
 327
 328         if (! (runtime = substream->runtime))
 329                 return -ENOTTY;
 330
 331         data = kmalloc(sizeof(*data), GFP_KERNEL);
 332         if (!data)
 333                 return -ENOMEM;
 334
 335         /* only fifo_size (RO from userspace) is different, so just copy all */
 336         if (copy_from_user(data, data32, sizeof(*data32))) {
 337                 err = -EFAULT;
 338                 goto error;
 339         }
 340
 341         if (refine)
 342                 err = snd_pcm_hw_refine(substream, data);
 343         else
 344                 err = snd_pcm_hw_params(substream, data);
 345         if (err < 0)
 346                 goto error;
 347         if (copy_to_user(data32, data, sizeof(*data32)) ||
 348             put_user(data->fifo_size, &data32->fifo_size)) {
 349                 err = -EFAULT;
 350                 goto error;
 351         }
 352
 353         if (! refine) {
 354                 unsigned int new_boundary = recalculate_boundary(runtime);
 355                 if (new_boundary)
 356                         runtime->boundary = new_boundary;
 357         }
 358  error:
 359         kfree(data);
 360         return err;
 361 }
 362
 363
 364 /*
 365  */
 366 struct snd_xferi32 {
 367         s32 result;
 368         u32 buf;
 369         u32 frames;
 370 };
 371
 372 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
 373                                       int dir, struct snd_xferi32 __user *data32)
 374 {
 375         compat_caddr_t buf;
 376         u32 frames;
 377         int err;
 378
 379         if (! substream->runtime)
 380                 return -ENOTTY;
 381         if (substream->stream != dir)
 382                 return -EINVAL;
 383         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 384                 return -EBADFD;
 385
 386         if (get_user(buf, &data32->buf) ||
 387             get_user(frames, &data32->frames))
 388                 return -EFAULT;
 389
 390         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 391                 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
 392         else
 393                 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
 394         if (err < 0)
 395                 return err;
 396         /* copy the result */
 397         if (put_user(err, &data32->result))
 398                 return -EFAULT;
 399         return 0;
 400 }
 401
 402
 403 /* snd_xfern needs remapping of bufs */
 404 struct snd_xfern32 {
 405         s32 result;
 406         u32 bufs;  /* this is void **; */
 407         u32 frames;
 408 };
 409
 410 /*
 411  * xfern ioctl nees to copy (up to) 128 pointers on stack.
 412  * although we may pass the copied pointers through f_op->ioctl, but the ioctl
 413  * handler there expands again the same 128 pointers on stack, so it is better
 414  * to handle the function (calling pcm_readv/writev) directly in this handler.
 415  */
 416 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
 417                                       int dir, struct snd_xfern32 __user *data32)
 418 {
 419         compat_caddr_t buf;
 420         compat_caddr_t __user *bufptr;
 421         u32 frames;
 422         void __user **bufs;
 423         int err, ch, i;
 424
 425         if (! substream->runtime)
 426                 return -ENOTTY;
 427         if (substream->stream != dir)
 428                 return -EINVAL;
 429
 430         if ((ch = substream->runtime->channels) > 128)
 431                 return -EINVAL;
 432         if (get_user(buf, &data32->bufs) ||
 433             get_user(frames, &data32->frames))
 434                 return -EFAULT;
 435         bufptr = compat_ptr(buf);
 436         bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
 437         if (bufs == NULL)
 438                 return -ENOMEM;
 439         for (i = 0; i < ch; i++) {
 440                 u32 ptr;
 441                 if (get_user(ptr, bufptr)) {
 442                         kfree(bufs);
 443                         return -EFAULT;
 444                 }
 445                 bufs[i] = compat_ptr(ptr);
 446                 bufptr++;
 447         }
 448         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 449                 err = snd_pcm_lib_writev(substream, bufs, frames);
 450         else
 451                 err = snd_pcm_lib_readv(substream, bufs, frames);
 452         if (err >= 0) {
 453                 if (put_user(err, &data32->result))
 454                         err = -EFAULT;
 455         }
 456         kfree(bufs);
 457         return err;
 458 }
 459
 460
 461 struct snd_pcm_mmap_status32 {
 462         s32 state;
 463         s32 pad1;
 464         u32 hw_ptr;
 465         struct compat_timespec tstamp;
 466         s32 suspended_state;
 467         struct compat_timespec audio_tstamp;
 468 } __attribute__((packed));
 469
 470 struct snd_pcm_mmap_control32 {
 471         u32 appl_ptr;
 472         u32 avail_min;
 473 };
 474
 475 struct snd_pcm_sync_ptr32 {
 476         u32 flags;
 477         union {
 478                 struct snd_pcm_mmap_status32 status;
 479                 unsigned char reserved[64];
 480         } s;
 481         union {
 482                 struct snd_pcm_mmap_control32 control;
 483                 unsigned char reserved[64];
 484         } c;
 485 } __attribute__((packed));
 486
 487 static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
 488                                          struct snd_pcm_sync_ptr32 __user *src)
 489 {
 490         struct snd_pcm_runtime *runtime = substream->runtime;
 491         volatile struct snd_pcm_mmap_status *status;
 492         volatile struct snd_pcm_mmap_control *control;
 493         u32 sflags;
 494         struct snd_pcm_mmap_control scontrol;
 495         struct snd_pcm_mmap_status sstatus;
 496         snd_pcm_uframes_t boundary;
 497         int err;
 498
 499         if (snd_BUG_ON(!runtime))
 500                 return -EINVAL;
 501
 502         if (get_user(sflags, &src->flags) ||
 503             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 504             get_user(scontrol.avail_min, &src->c.control.avail_min))
 505                 return -EFAULT;
 506         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 507                 err = snd_pcm_hwsync(substream);
 508                 if (err < 0)
 509                         return err;
 510         }
 511         status = runtime->status;
 512         control = runtime->control;
 513         boundary = recalculate_boundary(runtime);
 514         if (! boundary)
 515                 boundary = 0x7fffffff;
 516         snd_pcm_stream_lock_irq(substream);
 517         /* FIXME: we should consider the boundary for the sync from app */
 518         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 519                 control->appl_ptr = scontrol.appl_ptr;
 520         else
 521                 scontrol.appl_ptr = control->appl_ptr % boundary;
 522         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 523                 control->avail_min = scontrol.avail_min;
 524         else
 525                 scontrol.avail_min = control->avail_min;
 526         sstatus.state = status->state;
 527         sstatus.hw_ptr = status->hw_ptr % boundary;
 528         sstatus.tstamp = status->tstamp;
 529         sstatus.suspended_state = status->suspended_state;
 530         sstatus.audio_tstamp = status->audio_tstamp;
 531         snd_pcm_stream_unlock_irq(substream);
 532         if (put_user(sstatus.state, &src->s.status.state) ||
 533             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 534             compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 535             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 536             compat_put_timespec(&sstatus.audio_tstamp,
 537                     &src->s.status.audio_tstamp) ||
 538             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 539             put_user(scontrol.avail_min, &src->c.control.avail_min))
 540                 return -EFAULT;
 541
 542         return 0;
 543 }
 544
 545 #ifdef CONFIG_X86_X32
 546 /* X32 ABI has 64bit timespec and 64bit alignment */
 547 struct snd_pcm_mmap_status_x32 {
 548         s32 state;
 549         s32 pad1;
 550         u32 hw_ptr;
 551         u32 pad2; /* alignment */
 552         struct timespec tstamp;
 553         s32 suspended_state;
 554         struct timespec audio_tstamp;
 555 } __packed;
 556
 557 struct snd_pcm_mmap_control_x32 {
 558         u32 appl_ptr;
 559         u32 avail_min;
 560 };
 561
 562 struct snd_pcm_sync_ptr_x32 {
 563         u32 flags;
 564         u32 rsvd; /* alignment */
 565         union {
 566                 struct snd_pcm_mmap_status_x32 status;
 567                 unsigned char reserved[64];
 568         } s;
 569         union {
 570                 struct snd_pcm_mmap_control_x32 control;
 571                 unsigned char reserved[64];
 572         } c;
 573 } __packed;
 574
 575 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
 576                                       struct snd_pcm_sync_ptr_x32 __user *src)
 577 {
 578         struct snd_pcm_runtime *runtime = substream->runtime;
 579         volatile struct snd_pcm_mmap_status *status;
 580         volatile struct snd_pcm_mmap_control *control;
 581         u32 sflags;
 582         struct snd_pcm_mmap_control scontrol;
 583         struct snd_pcm_mmap_status sstatus;
 584         snd_pcm_uframes_t boundary;
 585         int err;
 586
 587         if (snd_BUG_ON(!runtime))
 588                 return -EINVAL;
 589
 590         if (get_user(sflags, &src->flags) ||
 591             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 592             get_user(scontrol.avail_min, &src->c.control.avail_min))
 593                 return -EFAULT;
 594         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 595                 err = snd_pcm_hwsync(substream);
 596                 if (err < 0)
 597                         return err;
 598         }
 599         status = runtime->status;
 600         control = runtime->control;
 601         boundary = recalculate_boundary(runtime);
 602         if (!boundary)
 603                 boundary = 0x7fffffff;
 604         snd_pcm_stream_lock_irq(substream);
 605         /* FIXME: we should consider the boundary for the sync from app */
 606         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 607                 control->appl_ptr = scontrol.appl_ptr;
 608         else
 609                 scontrol.appl_ptr = control->appl_ptr % boundary;
 610         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 611                 control->avail_min = scontrol.avail_min;
 612         else
 613                 scontrol.avail_min = control->avail_min;
 614         sstatus.state = status->state;
 615         sstatus.hw_ptr = status->hw_ptr % boundary;
 616         sstatus.tstamp = status->tstamp;
 617         sstatus.suspended_state = status->suspended_state;
 618         sstatus.audio_tstamp = status->audio_tstamp;
 619         snd_pcm_stream_unlock_irq(substream);
 620         if (put_user(sstatus.state, &src->s.status.state) ||
 621             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 622             put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 623             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 624             put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
 625             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 626             put_user(scontrol.avail_min, &src->c.control.avail_min))
 627                 return -EFAULT;
 628
 629         return 0;
 630 }
 631 #endif /* CONFIG_X86_X32 */
 632
 633 /*
 634  */
 635 enum {
 636         SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
 637         SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
 638         SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
 639         SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
 640         SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
 641         SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
 642         SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
 643         SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
 644         SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
 645         SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
 646         SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
 647         SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
 648         SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
 649         SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
 650 #ifdef CONFIG_X86_X32
 651         SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
 652         SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
 653         SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
 654         SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
 655 #endif /* CONFIG_X86_X32 */
 656 };
 657
 658 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 659 {
 660         struct snd_pcm_file *pcm_file;
 661         struct snd_pcm_substream *substream;
 662         void __user *argp = compat_ptr(arg);
 663
 664         pcm_file = file->private_data;
 665         if (! pcm_file)
 666                 return -ENOTTY;
 667         substream = pcm_file->substream;
 668         if (! substream)
 669                 return -ENOTTY;
 670
 671         /*
 672          * When PCM is used on 32bit mode, we need to disable
 673          * mmap of PCM status/control records because of the size
 674          * incompatibility.
 675          */
 676         pcm_file->no_compat_mmap = 1;
 677
 678         switch (cmd) {
 679         case SNDRV_PCM_IOCTL_PVERSION:
 680         case SNDRV_PCM_IOCTL_INFO:
 681         case SNDRV_PCM_IOCTL_TSTAMP:
 682         case SNDRV_PCM_IOCTL_TTSTAMP:
 683         case SNDRV_PCM_IOCTL_HWSYNC:
 684         case SNDRV_PCM_IOCTL_PREPARE:
 685         case SNDRV_PCM_IOCTL_RESET:
 686         case SNDRV_PCM_IOCTL_START:
 687         case SNDRV_PCM_IOCTL_DROP:
 688         case SNDRV_PCM_IOCTL_DRAIN:
 689         case SNDRV_PCM_IOCTL_PAUSE:
 690         case SNDRV_PCM_IOCTL_HW_FREE:
 691         case SNDRV_PCM_IOCTL_RESUME:
 692         case SNDRV_PCM_IOCTL_XRUN:
 693         case SNDRV_PCM_IOCTL_LINK:
 694         case SNDRV_PCM_IOCTL_UNLINK:
 695                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 696                         return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
 697                 else
 698                         return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
 699         case SNDRV_PCM_IOCTL_HW_REFINE32:
 700                 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
 701         case SNDRV_PCM_IOCTL_HW_PARAMS32:
 702                 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
 703         case SNDRV_PCM_IOCTL_SW_PARAMS32:
 704                 return snd_pcm_ioctl_sw_params_compat(substream, argp);
 705         case SNDRV_PCM_IOCTL_STATUS32:
 706                 return snd_pcm_status_user_compat(substream, argp, false);
 707         case SNDRV_PCM_IOCTL_STATUS_EXT32:
 708                 return snd_pcm_status_user_compat(substream, argp, true);
 709         case SNDRV_PCM_IOCTL_SYNC_PTR32:
 710                 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
 711         case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
 712                 return snd_pcm_ioctl_channel_info_compat(substream, argp);
 713         case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
 714                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 715         case SNDRV_PCM_IOCTL_READI_FRAMES32:
 716                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 717         case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
 718                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 719         case SNDRV_PCM_IOCTL_READN_FRAMES32:
 720                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 721         case SNDRV_PCM_IOCTL_DELAY32:
 722                 return snd_pcm_ioctl_delay_compat(substream, argp);
 723         case SNDRV_PCM_IOCTL_REWIND32:
 724                 return snd_pcm_ioctl_rewind_compat(substream, argp);
 725         case SNDRV_PCM_IOCTL_FORWARD32:
 726                 return snd_pcm_ioctl_forward_compat(substream, argp);
 727 #ifdef CONFIG_X86_X32
 728         case SNDRV_PCM_IOCTL_STATUS_X32:
 729                 return snd_pcm_status_user_x32(substream, argp, false);
 730         case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
 731                 return snd_pcm_status_user_x32(substream, argp, true);
 732         case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
 733                 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
 734         case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
 735                 return snd_pcm_ioctl_channel_info_x32(substream, argp);
 736 #endif /* CONFIG_X86_X32 */
 737         }
 738
 739         return -ENOIOCTLCMD;
 740 }