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         int err;
  31
  32         err = snd_pcm_delay(substream, &delay);
  33         if (err)
  34                 return err;
  35         if (put_user(delay, src))
  36                 return -EFAULT;
  37         return 0;
  38 }
  39
  40 static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
  41                                        u32 __user *src)
  42 {
  43         snd_pcm_uframes_t frames;
  44         int err;
  45
  46         if (get_user(frames, src))
  47                 return -EFAULT;
  48         err = snd_pcm_rewind(substream, frames);
  49         if (put_user(err, src))
  50                 return -EFAULT;
  51         return err < 0 ? err : 0;
  52 }
  53
  54 static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
  55                                        u32 __user *src)
  56 {
  57         snd_pcm_uframes_t frames;
  58         int err;
  59
  60         if (get_user(frames, src))
  61                 return -EFAULT;
  62         err = snd_pcm_forward(substream, frames);
  63         if (put_user(err, src))
  64                 return -EFAULT;
  65         return err < 0 ? err : 0;
  66 }
  67
  68 struct snd_pcm_hw_params32 {
  69         u32 flags;
  70         struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
  71         struct snd_mask mres[5];        /* reserved masks */
  72         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
  73         struct snd_interval ires[9];    /* reserved intervals */
  74         u32 rmask;
  75         u32 cmask;
  76         u32 info;
  77         u32 msbits;
  78         u32 rate_num;
  79         u32 rate_den;
  80         u32 fifo_size;
  81         unsigned char reserved[64];
  82 };
  83
  84 struct snd_pcm_sw_params32 {
  85         s32 tstamp_mode;
  86         u32 period_step;
  87         u32 sleep_min;
  88         u32 avail_min;
  89         u32 xfer_align;
  90         u32 start_threshold;
  91         u32 stop_threshold;
  92         u32 silence_threshold;
  93         u32 silence_size;
  94         u32 boundary;
  95         u32 proto;
  96         u32 tstamp_type;
  97         unsigned char reserved[56];
  98 };
  99
 100 /* recalcuate the boundary within 32bit */
 101 static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
 102 {
 103         snd_pcm_uframes_t boundary;
 104
 105         if (! runtime->buffer_size)
 106                 return 0;
 107         boundary = runtime->buffer_size;
 108         while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
 109                 boundary *= 2;
 110         return boundary;
 111 }
 112
 113 static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
 114                                           struct snd_pcm_sw_params32 __user *src)
 115 {
 116         struct snd_pcm_sw_params params;
 117         snd_pcm_uframes_t boundary;
 118         int err;
 119
 120         memset(&params, 0, sizeof(params));
 121         if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
 122             get_user(params.period_step, &src->period_step) ||
 123             get_user(params.sleep_min, &src->sleep_min) ||
 124             get_user(params.avail_min, &src->avail_min) ||
 125             get_user(params.xfer_align, &src->xfer_align) ||
 126             get_user(params.start_threshold, &src->start_threshold) ||
 127             get_user(params.stop_threshold, &src->stop_threshold) ||
 128             get_user(params.silence_threshold, &src->silence_threshold) ||
 129             get_user(params.silence_size, &src->silence_size) ||
 130             get_user(params.tstamp_type, &src->tstamp_type) ||
 131             get_user(params.proto, &src->proto))
 132                 return -EFAULT;
 133         /*
 134          * Check silent_size parameter.  Since we have 64bit boundary,
 135          * silence_size must be compared with the 32bit boundary.
 136          */
 137         boundary = recalculate_boundary(substream->runtime);
 138         if (boundary && params.silence_size >= boundary)
 139                 params.silence_size = substream->runtime->boundary;
 140         err = snd_pcm_sw_params(substream, &params);
 141         if (err < 0)
 142                 return err;
 143         if (boundary && put_user(boundary, &src->boundary))
 144                 return -EFAULT;
 145         return err;
 146 }
 147
 148 struct snd_pcm_channel_info32 {
 149         u32 channel;
 150         u32 offset;
 151         u32 first;
 152         u32 step;
 153 };
 154
 155 static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
 156                                              struct snd_pcm_channel_info32 __user *src)
 157 {
 158         struct snd_pcm_channel_info info;
 159         int err;
 160
 161         if (get_user(info.channel, &src->channel) ||
 162             get_user(info.offset, &src->offset) ||
 163             get_user(info.first, &src->first) ||
 164             get_user(info.step, &src->step))
 165                 return -EFAULT;
 166         err = snd_pcm_channel_info(substream, &info);
 167         if (err < 0)
 168                 return err;
 169         if (put_user(info.channel, &src->channel) ||
 170             put_user(info.offset, &src->offset) ||
 171             put_user(info.first, &src->first) ||
 172             put_user(info.step, &src->step))
 173                 return -EFAULT;
 174         return err;
 175 }
 176
 177 #ifdef CONFIG_X86_X32
 178 /* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */
 179 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 180                                      struct snd_pcm_channel_info __user *src);
 181 #define snd_pcm_ioctl_channel_info_x32(s, p)    \
 182         snd_pcm_channel_info_user(s, p)
 183 #endif /* CONFIG_X86_X32 */
 184
 185 struct snd_pcm_status32 {
 186         s32 state;
 187         struct compat_timespec trigger_tstamp;
 188         struct compat_timespec tstamp;
 189         u32 appl_ptr;
 190         u32 hw_ptr;
 191         s32 delay;
 192         u32 avail;
 193         u32 avail_max;
 194         u32 overrange;
 195         s32 suspended_state;
 196         u32 audio_tstamp_data;
 197         struct compat_timespec audio_tstamp;
 198         struct compat_timespec driver_tstamp;
 199         u32 audio_tstamp_accuracy;
 200         unsigned char reserved[52-2*sizeof(struct compat_timespec)];
 201 } __attribute__((packed));
 202
 203
 204 static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
 205                                       struct snd_pcm_status32 __user *src,
 206                                       bool ext)
 207 {
 208         struct snd_pcm_status status;
 209         int err;
 210
 211         memset(&status, 0, sizeof(status));
 212         /*
 213          * with extension, parameters are read/write,
 214          * get audio_tstamp_data from user,
 215          * ignore rest of status structure
 216          */
 217         if (ext && get_user(status.audio_tstamp_data,
 218                                 (u32 __user *)(&src->audio_tstamp_data)))
 219                 return -EFAULT;
 220         err = snd_pcm_status(substream, &status);
 221         if (err < 0)
 222                 return err;
 223
 224         if (clear_user(src, sizeof(*src)))
 225                 return -EFAULT;
 226         if (put_user(status.state, &src->state) ||
 227             compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 228             compat_put_timespec(&status.tstamp, &src->tstamp) ||
 229             put_user(status.appl_ptr, &src->appl_ptr) ||
 230             put_user(status.hw_ptr, &src->hw_ptr) ||
 231             put_user(status.delay, &src->delay) ||
 232             put_user(status.avail, &src->avail) ||
 233             put_user(status.avail_max, &src->avail_max) ||
 234             put_user(status.overrange, &src->overrange) ||
 235             put_user(status.suspended_state, &src->suspended_state) ||
 236             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 237             compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 238             compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 239             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 240                 return -EFAULT;
 241
 242         return err;
 243 }
 244
 245 #ifdef CONFIG_X86_X32
 246 /* X32 ABI has 64bit timespec and 64bit alignment */
 247 struct snd_pcm_status_x32 {
 248         s32 state;
 249         u32 rsvd; /* alignment */
 250         struct timespec trigger_tstamp;
 251         struct timespec tstamp;
 252         u32 appl_ptr;
 253         u32 hw_ptr;
 254         s32 delay;
 255         u32 avail;
 256         u32 avail_max;
 257         u32 overrange;
 258         s32 suspended_state;
 259         u32 audio_tstamp_data;
 260         struct timespec audio_tstamp;
 261         struct timespec driver_tstamp;
 262         u32 audio_tstamp_accuracy;
 263         unsigned char reserved[52-2*sizeof(struct timespec)];
 264 } __packed;
 265
 266 #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
 267
 268 static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream,
 269                                    struct snd_pcm_status_x32 __user *src,
 270                                    bool ext)
 271 {
 272         struct snd_pcm_status status;
 273         int err;
 274
 275         memset(&status, 0, sizeof(status));
 276         /*
 277          * with extension, parameters are read/write,
 278          * get audio_tstamp_data from user,
 279          * ignore rest of status structure
 280          */
 281         if (ext && get_user(status.audio_tstamp_data,
 282                                 (u32 __user *)(&src->audio_tstamp_data)))
 283                 return -EFAULT;
 284         err = snd_pcm_status(substream, &status);
 285         if (err < 0)
 286                 return err;
 287
 288         if (clear_user(src, sizeof(*src)))
 289                 return -EFAULT;
 290         if (put_user(status.state, &src->state) ||
 291             put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
 292             put_timespec(&status.tstamp, &src->tstamp) ||
 293             put_user(status.appl_ptr, &src->appl_ptr) ||
 294             put_user(status.hw_ptr, &src->hw_ptr) ||
 295             put_user(status.delay, &src->delay) ||
 296             put_user(status.avail, &src->avail) ||
 297             put_user(status.avail_max, &src->avail_max) ||
 298             put_user(status.overrange, &src->overrange) ||
 299             put_user(status.suspended_state, &src->suspended_state) ||
 300             put_user(status.audio_tstamp_data, &src->audio_tstamp_data) ||
 301             put_timespec(&status.audio_tstamp, &src->audio_tstamp) ||
 302             put_timespec(&status.driver_tstamp, &src->driver_tstamp) ||
 303             put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy))
 304                 return -EFAULT;
 305
 306         return err;
 307 }
 308 #endif /* CONFIG_X86_X32 */
 309
 310 /* both for HW_PARAMS and HW_REFINE */
 311 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
 312                                           int refine,
 313                                           struct snd_pcm_hw_params32 __user *data32)
 314 {
 315         struct snd_pcm_hw_params *data;
 316         struct snd_pcm_runtime *runtime;
 317         int err;
 318
 319         if (! (runtime = substream->runtime))
 320                 return -ENOTTY;
 321
 322         data = kmalloc(sizeof(*data), GFP_KERNEL);
 323         if (!data)
 324                 return -ENOMEM;
 325
 326         /* only fifo_size (RO from userspace) is different, so just copy all */
 327         if (copy_from_user(data, data32, sizeof(*data32))) {
 328                 err = -EFAULT;
 329                 goto error;
 330         }
 331
 332         if (refine) {
 333                 err = snd_pcm_hw_refine(substream, data);
 334                 if (err < 0)
 335                         goto error;
 336                 err = fixup_unreferenced_params(substream, data);
 337         } else {
 338                 err = snd_pcm_hw_params(substream, data);
 339         }
 340         if (err < 0)
 341                 goto error;
 342         if (copy_to_user(data32, data, sizeof(*data32)) ||
 343             put_user(data->fifo_size, &data32->fifo_size)) {
 344                 err = -EFAULT;
 345                 goto error;
 346         }
 347
 348         if (! refine) {
 349                 unsigned int new_boundary = recalculate_boundary(runtime);
 350                 if (new_boundary)
 351                         runtime->boundary = new_boundary;
 352         }
 353  error:
 354         kfree(data);
 355         return err;
 356 }
 357
 358
 359 /*
 360  */
 361 struct snd_xferi32 {
 362         s32 result;
 363         u32 buf;
 364         u32 frames;
 365 };
 366
 367 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
 368                                       int dir, struct snd_xferi32 __user *data32)
 369 {
 370         compat_caddr_t buf;
 371         u32 frames;
 372         int err;
 373
 374         if (! substream->runtime)
 375                 return -ENOTTY;
 376         if (substream->stream != dir)
 377                 return -EINVAL;
 378         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 379                 return -EBADFD;
 380
 381         if (get_user(buf, &data32->buf) ||
 382             get_user(frames, &data32->frames))
 383                 return -EFAULT;
 384
 385         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 386                 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
 387         else
 388                 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
 389         if (err < 0)
 390                 return err;
 391         /* copy the result */
 392         if (put_user(err, &data32->result))
 393                 return -EFAULT;
 394         return 0;
 395 }
 396
 397
 398 /* snd_xfern needs remapping of bufs */
 399 struct snd_xfern32 {
 400         s32 result;
 401         u32 bufs;  /* this is void **; */
 402         u32 frames;
 403 };
 404
 405 /*
 406  * xfern ioctl nees to copy (up to) 128 pointers on stack.
 407  * although we may pass the copied pointers through f_op->ioctl, but the ioctl
 408  * handler there expands again the same 128 pointers on stack, so it is better
 409  * to handle the function (calling pcm_readv/writev) directly in this handler.
 410  */
 411 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
 412                                       int dir, struct snd_xfern32 __user *data32)
 413 {
 414         compat_caddr_t buf;
 415         compat_caddr_t __user *bufptr;
 416         u32 frames;
 417         void __user **bufs;
 418         int err, ch, i;
 419
 420         if (! substream->runtime)
 421                 return -ENOTTY;
 422         if (substream->stream != dir)
 423                 return -EINVAL;
 424         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
 425                 return -EBADFD;
 426
 427         if ((ch = substream->runtime->channels) > 128)
 428                 return -EINVAL;
 429         if (get_user(buf, &data32->bufs) ||
 430             get_user(frames, &data32->frames))
 431                 return -EFAULT;
 432         bufptr = compat_ptr(buf);
 433         bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL);
 434         if (bufs == NULL)
 435                 return -ENOMEM;
 436         for (i = 0; i < ch; i++) {
 437                 u32 ptr;
 438                 if (get_user(ptr, bufptr)) {
 439                         kfree(bufs);
 440                         return -EFAULT;
 441                 }
 442                 bufs[i] = compat_ptr(ptr);
 443                 bufptr++;
 444         }
 445         if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 446                 err = snd_pcm_lib_writev(substream, bufs, frames);
 447         else
 448                 err = snd_pcm_lib_readv(substream, bufs, frames);
 449         if (err >= 0) {
 450                 if (put_user(err, &data32->result))
 451                         err = -EFAULT;
 452         }
 453         kfree(bufs);
 454         return err;
 455 }
 456
 457
 458 struct snd_pcm_mmap_status32 {
 459         s32 state;
 460         s32 pad1;
 461         u32 hw_ptr;
 462         struct compat_timespec tstamp;
 463         s32 suspended_state;
 464         struct compat_timespec audio_tstamp;
 465 } __attribute__((packed));
 466
 467 struct snd_pcm_mmap_control32 {
 468         u32 appl_ptr;
 469         u32 avail_min;
 470 };
 471
 472 struct snd_pcm_sync_ptr32 {
 473         u32 flags;
 474         union {
 475                 struct snd_pcm_mmap_status32 status;
 476                 unsigned char reserved[64];
 477         } s;
 478         union {
 479                 struct snd_pcm_mmap_control32 control;
 480                 unsigned char reserved[64];
 481         } c;
 482 } __attribute__((packed));
 483
 484 static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
 485                                          struct snd_pcm_sync_ptr32 __user *src)
 486 {
 487         struct snd_pcm_runtime *runtime = substream->runtime;
 488         volatile struct snd_pcm_mmap_status *status;
 489         volatile struct snd_pcm_mmap_control *control;
 490         u32 sflags;
 491         struct snd_pcm_mmap_control scontrol;
 492         struct snd_pcm_mmap_status sstatus;
 493         snd_pcm_uframes_t boundary;
 494         int err;
 495
 496         if (snd_BUG_ON(!runtime))
 497                 return -EINVAL;
 498
 499         if (get_user(sflags, &src->flags) ||
 500             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 501             get_user(scontrol.avail_min, &src->c.control.avail_min))
 502                 return -EFAULT;
 503         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 504                 err = snd_pcm_hwsync(substream);
 505                 if (err < 0)
 506                         return err;
 507         }
 508         status = runtime->status;
 509         control = runtime->control;
 510         boundary = recalculate_boundary(runtime);
 511         if (! boundary)
 512                 boundary = 0x7fffffff;
 513         snd_pcm_stream_lock_irq(substream);
 514         /* FIXME: we should consider the boundary for the sync from app */
 515         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 516                 control->appl_ptr = scontrol.appl_ptr;
 517         else
 518                 scontrol.appl_ptr = control->appl_ptr % boundary;
 519         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 520                 control->avail_min = scontrol.avail_min;
 521         else
 522                 scontrol.avail_min = control->avail_min;
 523         sstatus.state = status->state;
 524         sstatus.hw_ptr = status->hw_ptr % boundary;
 525         sstatus.tstamp = status->tstamp;
 526         sstatus.suspended_state = status->suspended_state;
 527         sstatus.audio_tstamp = status->audio_tstamp;
 528         snd_pcm_stream_unlock_irq(substream);
 529         if (put_user(sstatus.state, &src->s.status.state) ||
 530             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 531             compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 532             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 533             compat_put_timespec(&sstatus.audio_tstamp,
 534                     &src->s.status.audio_tstamp) ||
 535             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 536             put_user(scontrol.avail_min, &src->c.control.avail_min))
 537                 return -EFAULT;
 538
 539         return 0;
 540 }
 541
 542 #ifdef CONFIG_X86_X32
 543 /* X32 ABI has 64bit timespec and 64bit alignment */
 544 struct snd_pcm_mmap_status_x32 {
 545         s32 state;
 546         s32 pad1;
 547         u32 hw_ptr;
 548         u32 pad2; /* alignment */
 549         struct timespec tstamp;
 550         s32 suspended_state;
 551         s32 pad3;
 552         struct timespec audio_tstamp;
 553 } __packed;
 554
 555 struct snd_pcm_mmap_control_x32 {
 556         u32 appl_ptr;
 557         u32 avail_min;
 558 };
 559
 560 struct snd_pcm_sync_ptr_x32 {
 561         u32 flags;
 562         u32 rsvd; /* alignment */
 563         union {
 564                 struct snd_pcm_mmap_status_x32 status;
 565                 unsigned char reserved[64];
 566         } s;
 567         union {
 568                 struct snd_pcm_mmap_control_x32 control;
 569                 unsigned char reserved[64];
 570         } c;
 571 } __packed;
 572
 573 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
 574                                       struct snd_pcm_sync_ptr_x32 __user *src)
 575 {
 576         struct snd_pcm_runtime *runtime = substream->runtime;
 577         volatile struct snd_pcm_mmap_status *status;
 578         volatile struct snd_pcm_mmap_control *control;
 579         u32 sflags;
 580         struct snd_pcm_mmap_control scontrol;
 581         struct snd_pcm_mmap_status sstatus;
 582         snd_pcm_uframes_t boundary;
 583         int err;
 584
 585         if (snd_BUG_ON(!runtime))
 586                 return -EINVAL;
 587
 588         if (get_user(sflags, &src->flags) ||
 589             get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 590             get_user(scontrol.avail_min, &src->c.control.avail_min))
 591                 return -EFAULT;
 592         if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
 593                 err = snd_pcm_hwsync(substream);
 594                 if (err < 0)
 595                         return err;
 596         }
 597         status = runtime->status;
 598         control = runtime->control;
 599         boundary = recalculate_boundary(runtime);
 600         if (!boundary)
 601                 boundary = 0x7fffffff;
 602         snd_pcm_stream_lock_irq(substream);
 603         /* FIXME: we should consider the boundary for the sync from app */
 604         if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
 605                 control->appl_ptr = scontrol.appl_ptr;
 606         else
 607                 scontrol.appl_ptr = control->appl_ptr % boundary;
 608         if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
 609                 control->avail_min = scontrol.avail_min;
 610         else
 611                 scontrol.avail_min = control->avail_min;
 612         sstatus.state = status->state;
 613         sstatus.hw_ptr = status->hw_ptr % boundary;
 614         sstatus.tstamp = status->tstamp;
 615         sstatus.suspended_state = status->suspended_state;
 616         sstatus.audio_tstamp = status->audio_tstamp;
 617         snd_pcm_stream_unlock_irq(substream);
 618         if (put_user(sstatus.state, &src->s.status.state) ||
 619             put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
 620             put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
 621             put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
 622             put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) ||
 623             put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
 624             put_user(scontrol.avail_min, &src->c.control.avail_min))
 625                 return -EFAULT;
 626
 627         return 0;
 628 }
 629 #endif /* CONFIG_X86_X32 */
 630
 631 /*
 632  */
 633 enum {
 634         SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
 635         SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
 636         SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
 637         SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
 638         SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
 639         SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
 640         SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
 641         SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
 642         SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
 643         SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
 644         SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
 645         SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
 646         SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
 647         SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
 648 #ifdef CONFIG_X86_X32
 649         SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
 650         SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32),
 651         SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32),
 652         SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
 653 #endif /* CONFIG_X86_X32 */
 654 };
 655
 656 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
 657 {
 658         struct snd_pcm_file *pcm_file;
 659         struct snd_pcm_substream *substream;
 660         void __user *argp = compat_ptr(arg);
 661
 662         pcm_file = file->private_data;
 663         if (! pcm_file)
 664                 return -ENOTTY;
 665         substream = pcm_file->substream;
 666         if (! substream)
 667                 return -ENOTTY;
 668
 669         /*
 670          * When PCM is used on 32bit mode, we need to disable
 671          * mmap of PCM status/control records because of the size
 672          * incompatibility.
 673          */
 674         pcm_file->no_compat_mmap = 1;
 675
 676         switch (cmd) {
 677         case SNDRV_PCM_IOCTL_PVERSION:
 678         case SNDRV_PCM_IOCTL_INFO:
 679         case SNDRV_PCM_IOCTL_TSTAMP:
 680         case SNDRV_PCM_IOCTL_TTSTAMP:
 681         case SNDRV_PCM_IOCTL_USER_PVERSION:
 682         case SNDRV_PCM_IOCTL_HWSYNC:
 683         case SNDRV_PCM_IOCTL_PREPARE:
 684         case SNDRV_PCM_IOCTL_RESET:
 685         case SNDRV_PCM_IOCTL_START:
 686         case SNDRV_PCM_IOCTL_DROP:
 687         case SNDRV_PCM_IOCTL_DRAIN:
 688         case SNDRV_PCM_IOCTL_PAUSE:
 689         case SNDRV_PCM_IOCTL_HW_FREE:
 690         case SNDRV_PCM_IOCTL_RESUME:
 691         case SNDRV_PCM_IOCTL_XRUN:
 692         case SNDRV_PCM_IOCTL_LINK:
 693         case SNDRV_PCM_IOCTL_UNLINK:
 694                 return snd_pcm_common_ioctl(file, substream, cmd, argp);
 695         case SNDRV_PCM_IOCTL_HW_REFINE32:
 696                 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
 697         case SNDRV_PCM_IOCTL_HW_PARAMS32:
 698                 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
 699         case SNDRV_PCM_IOCTL_SW_PARAMS32:
 700                 return snd_pcm_ioctl_sw_params_compat(substream, argp);
 701         case SNDRV_PCM_IOCTL_STATUS32:
 702                 return snd_pcm_status_user_compat(substream, argp, false);
 703         case SNDRV_PCM_IOCTL_STATUS_EXT32:
 704                 return snd_pcm_status_user_compat(substream, argp, true);
 705         case SNDRV_PCM_IOCTL_SYNC_PTR32:
 706                 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
 707         case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
 708                 return snd_pcm_ioctl_channel_info_compat(substream, argp);
 709         case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
 710                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 711         case SNDRV_PCM_IOCTL_READI_FRAMES32:
 712                 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 713         case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
 714                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
 715         case SNDRV_PCM_IOCTL_READN_FRAMES32:
 716                 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
 717         case SNDRV_PCM_IOCTL_DELAY32:
 718                 return snd_pcm_ioctl_delay_compat(substream, argp);
 719         case SNDRV_PCM_IOCTL_REWIND32:
 720                 return snd_pcm_ioctl_rewind_compat(substream, argp);
 721         case SNDRV_PCM_IOCTL_FORWARD32:
 722                 return snd_pcm_ioctl_forward_compat(substream, argp);
 723 #ifdef CONFIG_X86_X32
 724         case SNDRV_PCM_IOCTL_STATUS_X32:
 725                 return snd_pcm_status_user_x32(substream, argp, false);
 726         case SNDRV_PCM_IOCTL_STATUS_EXT_X32:
 727                 return snd_pcm_status_user_x32(substream, argp, true);
 728         case SNDRV_PCM_IOCTL_SYNC_PTR_X32:
 729                 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
 730         case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
 731                 return snd_pcm_ioctl_channel_info_x32(substream, argp);
 732 #endif /* CONFIG_X86_X32 */
 733         }
 734
 735         return -ENOIOCTLCMD;
 736 }