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(¶ms, 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, ¶ms); 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 } 741