1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 32bit -> 64bit ioctl wrapper for PCM API 4 * Copyright (c) by Takashi Iwai <tiwai@suse.de> 5 */ 6 7 /* This file included from pcm_native.c */ 8 9 #include <linux/compat.h> 10 #include <linux/slab.h> 11 12 static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream, 13 s32 __user *src) 14 { 15 snd_pcm_sframes_t delay; 16 int err; 17 18 err = snd_pcm_delay(substream, &delay); 19 if (err) 20 return err; 21 if (put_user(delay, src)) 22 return -EFAULT; 23 return 0; 24 } 25 26 static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream, 27 u32 __user *src) 28 { 29 snd_pcm_uframes_t frames; 30 int err; 31 32 if (get_user(frames, src)) 33 return -EFAULT; 34 err = snd_pcm_rewind(substream, frames); 35 if (put_user(err, src)) 36 return -EFAULT; 37 return err < 0 ? err : 0; 38 } 39 40 static int snd_pcm_ioctl_forward_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_forward(substream, frames); 49 if (put_user(err, src)) 50 return -EFAULT; 51 return err < 0 ? err : 0; 52 } 53 54 struct snd_pcm_hw_params32 { 55 u32 flags; 56 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */ 57 struct snd_mask mres[5]; /* reserved masks */ 58 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 59 struct snd_interval ires[9]; /* reserved intervals */ 60 u32 rmask; 61 u32 cmask; 62 u32 info; 63 u32 msbits; 64 u32 rate_num; 65 u32 rate_den; 66 u32 fifo_size; 67 unsigned char reserved[64]; 68 }; 69 70 struct snd_pcm_sw_params32 { 71 s32 tstamp_mode; 72 u32 period_step; 73 u32 sleep_min; 74 u32 avail_min; 75 u32 xfer_align; 76 u32 start_threshold; 77 u32 stop_threshold; 78 u32 silence_threshold; 79 u32 silence_size; 80 u32 boundary; 81 u32 proto; 82 u32 tstamp_type; 83 unsigned char reserved[56]; 84 }; 85 86 /* recalcuate the boundary within 32bit */ 87 static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime) 88 { 89 snd_pcm_uframes_t boundary; 90 91 if (! runtime->buffer_size) 92 return 0; 93 boundary = runtime->buffer_size; 94 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) 95 boundary *= 2; 96 return boundary; 97 } 98 99 static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream, 100 struct snd_pcm_sw_params32 __user *src) 101 { 102 struct snd_pcm_sw_params params; 103 snd_pcm_uframes_t boundary; 104 int err; 105 106 memset(¶ms, 0, sizeof(params)); 107 if (get_user(params.tstamp_mode, &src->tstamp_mode) || 108 get_user(params.period_step, &src->period_step) || 109 get_user(params.sleep_min, &src->sleep_min) || 110 get_user(params.avail_min, &src->avail_min) || 111 get_user(params.xfer_align, &src->xfer_align) || 112 get_user(params.start_threshold, &src->start_threshold) || 113 get_user(params.stop_threshold, &src->stop_threshold) || 114 get_user(params.silence_threshold, &src->silence_threshold) || 115 get_user(params.silence_size, &src->silence_size) || 116 get_user(params.tstamp_type, &src->tstamp_type) || 117 get_user(params.proto, &src->proto)) 118 return -EFAULT; 119 /* 120 * Check silent_size parameter. Since we have 64bit boundary, 121 * silence_size must be compared with the 32bit boundary. 122 */ 123 boundary = recalculate_boundary(substream->runtime); 124 if (boundary && params.silence_size >= boundary) 125 params.silence_size = substream->runtime->boundary; 126 err = snd_pcm_sw_params(substream, ¶ms); 127 if (err < 0) 128 return err; 129 if (boundary && put_user(boundary, &src->boundary)) 130 return -EFAULT; 131 return err; 132 } 133 134 struct snd_pcm_channel_info32 { 135 u32 channel; 136 u32 offset; 137 u32 first; 138 u32 step; 139 }; 140 141 static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream, 142 struct snd_pcm_channel_info32 __user *src) 143 { 144 struct snd_pcm_channel_info info; 145 int err; 146 147 if (get_user(info.channel, &src->channel) || 148 get_user(info.offset, &src->offset) || 149 get_user(info.first, &src->first) || 150 get_user(info.step, &src->step)) 151 return -EFAULT; 152 err = snd_pcm_channel_info(substream, &info); 153 if (err < 0) 154 return err; 155 if (put_user(info.channel, &src->channel) || 156 put_user(info.offset, &src->offset) || 157 put_user(info.first, &src->first) || 158 put_user(info.step, &src->step)) 159 return -EFAULT; 160 return err; 161 } 162 163 #ifdef CONFIG_X86_X32 164 /* X32 ABI has the same struct as x86-64 for snd_pcm_channel_info */ 165 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 166 struct snd_pcm_channel_info __user *src); 167 #define snd_pcm_ioctl_channel_info_x32(s, p) \ 168 snd_pcm_channel_info_user(s, p) 169 #endif /* CONFIG_X86_X32 */ 170 171 struct snd_pcm_status32 { 172 s32 state; 173 struct compat_timespec trigger_tstamp; 174 struct compat_timespec tstamp; 175 u32 appl_ptr; 176 u32 hw_ptr; 177 s32 delay; 178 u32 avail; 179 u32 avail_max; 180 u32 overrange; 181 s32 suspended_state; 182 u32 audio_tstamp_data; 183 struct compat_timespec audio_tstamp; 184 struct compat_timespec driver_tstamp; 185 u32 audio_tstamp_accuracy; 186 unsigned char reserved[52-2*sizeof(struct compat_timespec)]; 187 } __attribute__((packed)); 188 189 190 static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, 191 struct snd_pcm_status32 __user *src, 192 bool ext) 193 { 194 struct snd_pcm_status status; 195 int err; 196 197 memset(&status, 0, sizeof(status)); 198 /* 199 * with extension, parameters are read/write, 200 * get audio_tstamp_data from user, 201 * ignore rest of status structure 202 */ 203 if (ext && get_user(status.audio_tstamp_data, 204 (u32 __user *)(&src->audio_tstamp_data))) 205 return -EFAULT; 206 err = snd_pcm_status(substream, &status); 207 if (err < 0) 208 return err; 209 210 if (clear_user(src, sizeof(*src))) 211 return -EFAULT; 212 if (put_user(status.state, &src->state) || 213 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) || 214 compat_put_timespec(&status.tstamp, &src->tstamp) || 215 put_user(status.appl_ptr, &src->appl_ptr) || 216 put_user(status.hw_ptr, &src->hw_ptr) || 217 put_user(status.delay, &src->delay) || 218 put_user(status.avail, &src->avail) || 219 put_user(status.avail_max, &src->avail_max) || 220 put_user(status.overrange, &src->overrange) || 221 put_user(status.suspended_state, &src->suspended_state) || 222 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) || 223 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp) || 224 compat_put_timespec(&status.driver_tstamp, &src->driver_tstamp) || 225 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy)) 226 return -EFAULT; 227 228 return err; 229 } 230 231 #ifdef CONFIG_X86_X32 232 /* X32 ABI has 64bit timespec and 64bit alignment */ 233 struct snd_pcm_status_x32 { 234 s32 state; 235 u32 rsvd; /* alignment */ 236 struct timespec trigger_tstamp; 237 struct timespec tstamp; 238 u32 appl_ptr; 239 u32 hw_ptr; 240 s32 delay; 241 u32 avail; 242 u32 avail_max; 243 u32 overrange; 244 s32 suspended_state; 245 u32 audio_tstamp_data; 246 struct timespec audio_tstamp; 247 struct timespec driver_tstamp; 248 u32 audio_tstamp_accuracy; 249 unsigned char reserved[52-2*sizeof(struct timespec)]; 250 } __packed; 251 252 #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst)) 253 254 static int snd_pcm_status_user_x32(struct snd_pcm_substream *substream, 255 struct snd_pcm_status_x32 __user *src, 256 bool ext) 257 { 258 struct snd_pcm_status status; 259 int err; 260 261 memset(&status, 0, sizeof(status)); 262 /* 263 * with extension, parameters are read/write, 264 * get audio_tstamp_data from user, 265 * ignore rest of status structure 266 */ 267 if (ext && get_user(status.audio_tstamp_data, 268 (u32 __user *)(&src->audio_tstamp_data))) 269 return -EFAULT; 270 err = snd_pcm_status(substream, &status); 271 if (err < 0) 272 return err; 273 274 if (clear_user(src, sizeof(*src))) 275 return -EFAULT; 276 if (put_user(status.state, &src->state) || 277 put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) || 278 put_timespec(&status.tstamp, &src->tstamp) || 279 put_user(status.appl_ptr, &src->appl_ptr) || 280 put_user(status.hw_ptr, &src->hw_ptr) || 281 put_user(status.delay, &src->delay) || 282 put_user(status.avail, &src->avail) || 283 put_user(status.avail_max, &src->avail_max) || 284 put_user(status.overrange, &src->overrange) || 285 put_user(status.suspended_state, &src->suspended_state) || 286 put_user(status.audio_tstamp_data, &src->audio_tstamp_data) || 287 put_timespec(&status.audio_tstamp, &src->audio_tstamp) || 288 put_timespec(&status.driver_tstamp, &src->driver_tstamp) || 289 put_user(status.audio_tstamp_accuracy, &src->audio_tstamp_accuracy)) 290 return -EFAULT; 291 292 return err; 293 } 294 #endif /* CONFIG_X86_X32 */ 295 296 /* both for HW_PARAMS and HW_REFINE */ 297 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, 298 int refine, 299 struct snd_pcm_hw_params32 __user *data32) 300 { 301 struct snd_pcm_hw_params *data; 302 struct snd_pcm_runtime *runtime; 303 int err; 304 305 if (! (runtime = substream->runtime)) 306 return -ENOTTY; 307 308 data = kmalloc(sizeof(*data), GFP_KERNEL); 309 if (!data) 310 return -ENOMEM; 311 312 /* only fifo_size (RO from userspace) is different, so just copy all */ 313 if (copy_from_user(data, data32, sizeof(*data32))) { 314 err = -EFAULT; 315 goto error; 316 } 317 318 if (refine) 319 err = snd_pcm_hw_refine(substream, data); 320 else 321 err = snd_pcm_hw_params(substream, data); 322 if (err < 0) 323 goto error; 324 if (copy_to_user(data32, data, sizeof(*data32)) || 325 put_user(data->fifo_size, &data32->fifo_size)) { 326 err = -EFAULT; 327 goto error; 328 } 329 330 if (! refine) { 331 unsigned int new_boundary = recalculate_boundary(runtime); 332 if (new_boundary) 333 runtime->boundary = new_boundary; 334 } 335 error: 336 kfree(data); 337 return err; 338 } 339 340 341 /* 342 */ 343 struct snd_xferi32 { 344 s32 result; 345 u32 buf; 346 u32 frames; 347 }; 348 349 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream, 350 int dir, struct snd_xferi32 __user *data32) 351 { 352 compat_caddr_t buf; 353 u32 frames; 354 int err; 355 356 if (! substream->runtime) 357 return -ENOTTY; 358 if (substream->stream != dir) 359 return -EINVAL; 360 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) 361 return -EBADFD; 362 363 if (get_user(buf, &data32->buf) || 364 get_user(frames, &data32->frames)) 365 return -EFAULT; 366 367 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 368 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames); 369 else 370 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames); 371 if (err < 0) 372 return err; 373 /* copy the result */ 374 if (put_user(err, &data32->result)) 375 return -EFAULT; 376 return 0; 377 } 378 379 380 /* snd_xfern needs remapping of bufs */ 381 struct snd_xfern32 { 382 s32 result; 383 u32 bufs; /* this is void **; */ 384 u32 frames; 385 }; 386 387 /* 388 * xfern ioctl nees to copy (up to) 128 pointers on stack. 389 * although we may pass the copied pointers through f_op->ioctl, but the ioctl 390 * handler there expands again the same 128 pointers on stack, so it is better 391 * to handle the function (calling pcm_readv/writev) directly in this handler. 392 */ 393 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, 394 int dir, struct snd_xfern32 __user *data32) 395 { 396 compat_caddr_t buf; 397 compat_caddr_t __user *bufptr; 398 u32 frames; 399 void __user **bufs; 400 int err, ch, i; 401 402 if (! substream->runtime) 403 return -ENOTTY; 404 if (substream->stream != dir) 405 return -EINVAL; 406 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) 407 return -EBADFD; 408 409 if ((ch = substream->runtime->channels) > 128) 410 return -EINVAL; 411 if (get_user(buf, &data32->bufs) || 412 get_user(frames, &data32->frames)) 413 return -EFAULT; 414 bufptr = compat_ptr(buf); 415 bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL); 416 if (bufs == NULL) 417 return -ENOMEM; 418 for (i = 0; i < ch; i++) { 419 u32 ptr; 420 if (get_user(ptr, bufptr)) { 421 kfree(bufs); 422 return -EFAULT; 423 } 424 bufs[i] = compat_ptr(ptr); 425 bufptr++; 426 } 427 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 428 err = snd_pcm_lib_writev(substream, bufs, frames); 429 else 430 err = snd_pcm_lib_readv(substream, bufs, frames); 431 if (err >= 0) { 432 if (put_user(err, &data32->result)) 433 err = -EFAULT; 434 } 435 kfree(bufs); 436 return err; 437 } 438 439 440 struct snd_pcm_mmap_status32 { 441 s32 state; 442 s32 pad1; 443 u32 hw_ptr; 444 struct compat_timespec tstamp; 445 s32 suspended_state; 446 struct compat_timespec audio_tstamp; 447 } __attribute__((packed)); 448 449 struct snd_pcm_mmap_control32 { 450 u32 appl_ptr; 451 u32 avail_min; 452 }; 453 454 struct snd_pcm_sync_ptr32 { 455 u32 flags; 456 union { 457 struct snd_pcm_mmap_status32 status; 458 unsigned char reserved[64]; 459 } s; 460 union { 461 struct snd_pcm_mmap_control32 control; 462 unsigned char reserved[64]; 463 } c; 464 } __attribute__((packed)); 465 466 static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, 467 struct snd_pcm_sync_ptr32 __user *src) 468 { 469 struct snd_pcm_runtime *runtime = substream->runtime; 470 volatile struct snd_pcm_mmap_status *status; 471 volatile struct snd_pcm_mmap_control *control; 472 u32 sflags; 473 struct snd_pcm_mmap_control scontrol; 474 struct snd_pcm_mmap_status sstatus; 475 snd_pcm_uframes_t boundary; 476 int err; 477 478 if (snd_BUG_ON(!runtime)) 479 return -EINVAL; 480 481 if (get_user(sflags, &src->flags) || 482 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 483 get_user(scontrol.avail_min, &src->c.control.avail_min)) 484 return -EFAULT; 485 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 486 err = snd_pcm_hwsync(substream); 487 if (err < 0) 488 return err; 489 } 490 status = runtime->status; 491 control = runtime->control; 492 boundary = recalculate_boundary(runtime); 493 if (! boundary) 494 boundary = 0x7fffffff; 495 snd_pcm_stream_lock_irq(substream); 496 /* FIXME: we should consider the boundary for the sync from app */ 497 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) 498 control->appl_ptr = scontrol.appl_ptr; 499 else 500 scontrol.appl_ptr = control->appl_ptr % boundary; 501 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 502 control->avail_min = scontrol.avail_min; 503 else 504 scontrol.avail_min = control->avail_min; 505 sstatus.state = status->state; 506 sstatus.hw_ptr = status->hw_ptr % boundary; 507 sstatus.tstamp = status->tstamp; 508 sstatus.suspended_state = status->suspended_state; 509 sstatus.audio_tstamp = status->audio_tstamp; 510 snd_pcm_stream_unlock_irq(substream); 511 if (put_user(sstatus.state, &src->s.status.state) || 512 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || 513 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) || 514 put_user(sstatus.suspended_state, &src->s.status.suspended_state) || 515 compat_put_timespec(&sstatus.audio_tstamp, 516 &src->s.status.audio_tstamp) || 517 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 518 put_user(scontrol.avail_min, &src->c.control.avail_min)) 519 return -EFAULT; 520 521 return 0; 522 } 523 524 #ifdef CONFIG_X86_X32 525 /* X32 ABI has 64bit timespec and 64bit alignment */ 526 struct snd_pcm_mmap_status_x32 { 527 s32 state; 528 s32 pad1; 529 u32 hw_ptr; 530 u32 pad2; /* alignment */ 531 struct timespec tstamp; 532 s32 suspended_state; 533 s32 pad3; 534 struct timespec audio_tstamp; 535 } __packed; 536 537 struct snd_pcm_mmap_control_x32 { 538 u32 appl_ptr; 539 u32 avail_min; 540 }; 541 542 struct snd_pcm_sync_ptr_x32 { 543 u32 flags; 544 u32 rsvd; /* alignment */ 545 union { 546 struct snd_pcm_mmap_status_x32 status; 547 unsigned char reserved[64]; 548 } s; 549 union { 550 struct snd_pcm_mmap_control_x32 control; 551 unsigned char reserved[64]; 552 } c; 553 } __packed; 554 555 static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream, 556 struct snd_pcm_sync_ptr_x32 __user *src) 557 { 558 struct snd_pcm_runtime *runtime = substream->runtime; 559 volatile struct snd_pcm_mmap_status *status; 560 volatile struct snd_pcm_mmap_control *control; 561 u32 sflags; 562 struct snd_pcm_mmap_control scontrol; 563 struct snd_pcm_mmap_status sstatus; 564 snd_pcm_uframes_t boundary; 565 int err; 566 567 if (snd_BUG_ON(!runtime)) 568 return -EINVAL; 569 570 if (get_user(sflags, &src->flags) || 571 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 572 get_user(scontrol.avail_min, &src->c.control.avail_min)) 573 return -EFAULT; 574 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 575 err = snd_pcm_hwsync(substream); 576 if (err < 0) 577 return err; 578 } 579 status = runtime->status; 580 control = runtime->control; 581 boundary = recalculate_boundary(runtime); 582 if (!boundary) 583 boundary = 0x7fffffff; 584 snd_pcm_stream_lock_irq(substream); 585 /* FIXME: we should consider the boundary for the sync from app */ 586 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) 587 control->appl_ptr = scontrol.appl_ptr; 588 else 589 scontrol.appl_ptr = control->appl_ptr % boundary; 590 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 591 control->avail_min = scontrol.avail_min; 592 else 593 scontrol.avail_min = control->avail_min; 594 sstatus.state = status->state; 595 sstatus.hw_ptr = status->hw_ptr % boundary; 596 sstatus.tstamp = status->tstamp; 597 sstatus.suspended_state = status->suspended_state; 598 sstatus.audio_tstamp = status->audio_tstamp; 599 snd_pcm_stream_unlock_irq(substream); 600 if (put_user(sstatus.state, &src->s.status.state) || 601 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || 602 put_timespec(&sstatus.tstamp, &src->s.status.tstamp) || 603 put_user(sstatus.suspended_state, &src->s.status.suspended_state) || 604 put_timespec(&sstatus.audio_tstamp, &src->s.status.audio_tstamp) || 605 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 606 put_user(scontrol.avail_min, &src->c.control.avail_min)) 607 return -EFAULT; 608 609 return 0; 610 } 611 #endif /* CONFIG_X86_X32 */ 612 613 /* 614 */ 615 enum { 616 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32), 617 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), 618 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), 619 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), 620 SNDRV_PCM_IOCTL_STATUS_EXT32 = _IOWR('A', 0x24, struct snd_pcm_status32), 621 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), 622 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), 623 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), 624 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32), 625 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32), 626 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32), 627 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32), 628 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32), 629 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32), 630 #ifdef CONFIG_X86_X32 631 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info), 632 SNDRV_PCM_IOCTL_STATUS_X32 = _IOR('A', 0x20, struct snd_pcm_status_x32), 633 SNDRV_PCM_IOCTL_STATUS_EXT_X32 = _IOWR('A', 0x24, struct snd_pcm_status_x32), 634 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32), 635 #endif /* CONFIG_X86_X32 */ 636 }; 637 638 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 639 { 640 struct snd_pcm_file *pcm_file; 641 struct snd_pcm_substream *substream; 642 void __user *argp = compat_ptr(arg); 643 644 pcm_file = file->private_data; 645 if (! pcm_file) 646 return -ENOTTY; 647 substream = pcm_file->substream; 648 if (! substream) 649 return -ENOTTY; 650 651 /* 652 * When PCM is used on 32bit mode, we need to disable 653 * mmap of PCM status/control records because of the size 654 * incompatibility. 655 */ 656 pcm_file->no_compat_mmap = 1; 657 658 switch (cmd) { 659 case SNDRV_PCM_IOCTL_PVERSION: 660 case SNDRV_PCM_IOCTL_INFO: 661 case SNDRV_PCM_IOCTL_TSTAMP: 662 case SNDRV_PCM_IOCTL_TTSTAMP: 663 case SNDRV_PCM_IOCTL_USER_PVERSION: 664 case SNDRV_PCM_IOCTL_HWSYNC: 665 case SNDRV_PCM_IOCTL_PREPARE: 666 case SNDRV_PCM_IOCTL_RESET: 667 case SNDRV_PCM_IOCTL_START: 668 case SNDRV_PCM_IOCTL_DROP: 669 case SNDRV_PCM_IOCTL_DRAIN: 670 case SNDRV_PCM_IOCTL_PAUSE: 671 case SNDRV_PCM_IOCTL_HW_FREE: 672 case SNDRV_PCM_IOCTL_RESUME: 673 case SNDRV_PCM_IOCTL_XRUN: 674 case SNDRV_PCM_IOCTL_LINK: 675 case SNDRV_PCM_IOCTL_UNLINK: 676 return snd_pcm_common_ioctl(file, substream, cmd, argp); 677 case SNDRV_PCM_IOCTL_HW_REFINE32: 678 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp); 679 case SNDRV_PCM_IOCTL_HW_PARAMS32: 680 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp); 681 case SNDRV_PCM_IOCTL_SW_PARAMS32: 682 return snd_pcm_ioctl_sw_params_compat(substream, argp); 683 case SNDRV_PCM_IOCTL_STATUS32: 684 return snd_pcm_status_user_compat(substream, argp, false); 685 case SNDRV_PCM_IOCTL_STATUS_EXT32: 686 return snd_pcm_status_user_compat(substream, argp, true); 687 case SNDRV_PCM_IOCTL_SYNC_PTR32: 688 return snd_pcm_ioctl_sync_ptr_compat(substream, argp); 689 case SNDRV_PCM_IOCTL_CHANNEL_INFO32: 690 return snd_pcm_ioctl_channel_info_compat(substream, argp); 691 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32: 692 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 693 case SNDRV_PCM_IOCTL_READI_FRAMES32: 694 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 695 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32: 696 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 697 case SNDRV_PCM_IOCTL_READN_FRAMES32: 698 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 699 case SNDRV_PCM_IOCTL_DELAY32: 700 return snd_pcm_ioctl_delay_compat(substream, argp); 701 case SNDRV_PCM_IOCTL_REWIND32: 702 return snd_pcm_ioctl_rewind_compat(substream, argp); 703 case SNDRV_PCM_IOCTL_FORWARD32: 704 return snd_pcm_ioctl_forward_compat(substream, argp); 705 #ifdef CONFIG_X86_X32 706 case SNDRV_PCM_IOCTL_STATUS_X32: 707 return snd_pcm_status_user_x32(substream, argp, false); 708 case SNDRV_PCM_IOCTL_STATUS_EXT_X32: 709 return snd_pcm_status_user_x32(substream, argp, true); 710 case SNDRV_PCM_IOCTL_SYNC_PTR_X32: 711 return snd_pcm_ioctl_sync_ptr_x32(substream, argp); 712 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32: 713 return snd_pcm_ioctl_channel_info_x32(substream, argp); 714 #endif /* CONFIG_X86_X32 */ 715 } 716 717 return -ENOIOCTLCMD; 718 } 719