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 struct snd_pcm_status32 { 187 s32 state; 188 struct compat_timespec trigger_tstamp; 189 struct compat_timespec tstamp; 190 u32 appl_ptr; 191 u32 hw_ptr; 192 s32 delay; 193 u32 avail; 194 u32 avail_max; 195 u32 overrange; 196 s32 suspended_state; 197 u32 reserved_alignment; 198 struct compat_timespec audio_tstamp; 199 unsigned char reserved[56-sizeof(struct compat_timespec)]; 200 } __attribute__((packed)); 201 202 203 static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, 204 struct snd_pcm_status32 __user *src) 205 { 206 struct snd_pcm_status status; 207 int err; 208 209 err = snd_pcm_status(substream, &status); 210 if (err < 0) 211 return err; 212 213 if (put_user(status.state, &src->state) || 214 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) || 215 compat_put_timespec(&status.tstamp, &src->tstamp) || 216 put_user(status.appl_ptr, &src->appl_ptr) || 217 put_user(status.hw_ptr, &src->hw_ptr) || 218 put_user(status.delay, &src->delay) || 219 put_user(status.avail, &src->avail) || 220 put_user(status.avail_max, &src->avail_max) || 221 put_user(status.overrange, &src->overrange) || 222 put_user(status.suspended_state, &src->suspended_state) || 223 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp)) 224 return -EFAULT; 225 226 return err; 227 } 228 229 /* both for HW_PARAMS and HW_REFINE */ 230 static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, 231 int refine, 232 struct snd_pcm_hw_params32 __user *data32) 233 { 234 struct snd_pcm_hw_params *data; 235 struct snd_pcm_runtime *runtime; 236 int err; 237 238 if (! (runtime = substream->runtime)) 239 return -ENOTTY; 240 241 /* only fifo_size is different, so just copy all */ 242 data = memdup_user(data32, sizeof(*data32)); 243 if (IS_ERR(data)) 244 return PTR_ERR(data); 245 246 if (refine) 247 err = snd_pcm_hw_refine(substream, data); 248 else 249 err = snd_pcm_hw_params(substream, data); 250 if (err < 0) 251 goto error; 252 if (copy_to_user(data32, data, sizeof(*data32)) || 253 put_user(data->fifo_size, &data32->fifo_size)) { 254 err = -EFAULT; 255 goto error; 256 } 257 258 if (! refine) { 259 unsigned int new_boundary = recalculate_boundary(runtime); 260 if (new_boundary) 261 runtime->boundary = new_boundary; 262 } 263 error: 264 kfree(data); 265 return err; 266 } 267 268 269 /* 270 */ 271 struct snd_xferi32 { 272 s32 result; 273 u32 buf; 274 u32 frames; 275 }; 276 277 static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream, 278 int dir, struct snd_xferi32 __user *data32) 279 { 280 compat_caddr_t buf; 281 u32 frames; 282 int err; 283 284 if (! substream->runtime) 285 return -ENOTTY; 286 if (substream->stream != dir) 287 return -EINVAL; 288 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) 289 return -EBADFD; 290 291 if (get_user(buf, &data32->buf) || 292 get_user(frames, &data32->frames)) 293 return -EFAULT; 294 295 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 296 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames); 297 else 298 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames); 299 if (err < 0) 300 return err; 301 /* copy the result */ 302 if (put_user(err, &data32->result)) 303 return -EFAULT; 304 return 0; 305 } 306 307 308 /* snd_xfern needs remapping of bufs */ 309 struct snd_xfern32 { 310 s32 result; 311 u32 bufs; /* this is void **; */ 312 u32 frames; 313 }; 314 315 /* 316 * xfern ioctl nees to copy (up to) 128 pointers on stack. 317 * although we may pass the copied pointers through f_op->ioctl, but the ioctl 318 * handler there expands again the same 128 pointers on stack, so it is better 319 * to handle the function (calling pcm_readv/writev) directly in this handler. 320 */ 321 static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, 322 int dir, struct snd_xfern32 __user *data32) 323 { 324 compat_caddr_t buf; 325 compat_caddr_t __user *bufptr; 326 u32 frames; 327 void __user **bufs; 328 int err, ch, i; 329 330 if (! substream->runtime) 331 return -ENOTTY; 332 if (substream->stream != dir) 333 return -EINVAL; 334 335 if ((ch = substream->runtime->channels) > 128) 336 return -EINVAL; 337 if (get_user(buf, &data32->bufs) || 338 get_user(frames, &data32->frames)) 339 return -EFAULT; 340 bufptr = compat_ptr(buf); 341 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL); 342 if (bufs == NULL) 343 return -ENOMEM; 344 for (i = 0; i < ch; i++) { 345 u32 ptr; 346 if (get_user(ptr, bufptr)) { 347 kfree(bufs); 348 return -EFAULT; 349 } 350 bufs[i] = compat_ptr(ptr); 351 bufptr++; 352 } 353 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 354 err = snd_pcm_lib_writev(substream, bufs, frames); 355 else 356 err = snd_pcm_lib_readv(substream, bufs, frames); 357 if (err >= 0) { 358 if (put_user(err, &data32->result)) 359 err = -EFAULT; 360 } 361 kfree(bufs); 362 return err; 363 } 364 365 366 struct snd_pcm_mmap_status32 { 367 s32 state; 368 s32 pad1; 369 u32 hw_ptr; 370 struct compat_timespec tstamp; 371 s32 suspended_state; 372 struct compat_timespec audio_tstamp; 373 } __attribute__((packed)); 374 375 struct snd_pcm_mmap_control32 { 376 u32 appl_ptr; 377 u32 avail_min; 378 }; 379 380 struct snd_pcm_sync_ptr32 { 381 u32 flags; 382 union { 383 struct snd_pcm_mmap_status32 status; 384 unsigned char reserved[64]; 385 } s; 386 union { 387 struct snd_pcm_mmap_control32 control; 388 unsigned char reserved[64]; 389 } c; 390 } __attribute__((packed)); 391 392 static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, 393 struct snd_pcm_sync_ptr32 __user *src) 394 { 395 struct snd_pcm_runtime *runtime = substream->runtime; 396 volatile struct snd_pcm_mmap_status *status; 397 volatile struct snd_pcm_mmap_control *control; 398 u32 sflags; 399 struct snd_pcm_mmap_control scontrol; 400 struct snd_pcm_mmap_status sstatus; 401 snd_pcm_uframes_t boundary; 402 int err; 403 404 if (snd_BUG_ON(!runtime)) 405 return -EINVAL; 406 407 if (get_user(sflags, &src->flags) || 408 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 409 get_user(scontrol.avail_min, &src->c.control.avail_min)) 410 return -EFAULT; 411 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 412 err = snd_pcm_hwsync(substream); 413 if (err < 0) 414 return err; 415 } 416 status = runtime->status; 417 control = runtime->control; 418 boundary = recalculate_boundary(runtime); 419 if (! boundary) 420 boundary = 0x7fffffff; 421 snd_pcm_stream_lock_irq(substream); 422 /* FIXME: we should consider the boundary for the sync from app */ 423 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) 424 control->appl_ptr = scontrol.appl_ptr; 425 else 426 scontrol.appl_ptr = control->appl_ptr % boundary; 427 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 428 control->avail_min = scontrol.avail_min; 429 else 430 scontrol.avail_min = control->avail_min; 431 sstatus.state = status->state; 432 sstatus.hw_ptr = status->hw_ptr % boundary; 433 sstatus.tstamp = status->tstamp; 434 sstatus.suspended_state = status->suspended_state; 435 sstatus.audio_tstamp = status->audio_tstamp; 436 snd_pcm_stream_unlock_irq(substream); 437 if (put_user(sstatus.state, &src->s.status.state) || 438 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || 439 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) || 440 put_user(sstatus.suspended_state, &src->s.status.suspended_state) || 441 compat_put_timespec(&sstatus.audio_tstamp, 442 &src->s.status.audio_tstamp) || 443 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 444 put_user(scontrol.avail_min, &src->c.control.avail_min)) 445 return -EFAULT; 446 447 return 0; 448 } 449 450 451 /* 452 */ 453 enum { 454 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32), 455 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), 456 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), 457 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), 458 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), 459 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), 460 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), 461 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32), 462 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32), 463 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32), 464 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32), 465 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32), 466 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32), 467 468 }; 469 470 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 471 { 472 struct snd_pcm_file *pcm_file; 473 struct snd_pcm_substream *substream; 474 void __user *argp = compat_ptr(arg); 475 476 pcm_file = file->private_data; 477 if (! pcm_file) 478 return -ENOTTY; 479 substream = pcm_file->substream; 480 if (! substream) 481 return -ENOTTY; 482 483 /* 484 * When PCM is used on 32bit mode, we need to disable 485 * mmap of PCM status/control records because of the size 486 * incompatibility. 487 */ 488 pcm_file->no_compat_mmap = 1; 489 490 switch (cmd) { 491 case SNDRV_PCM_IOCTL_PVERSION: 492 case SNDRV_PCM_IOCTL_INFO: 493 case SNDRV_PCM_IOCTL_TSTAMP: 494 case SNDRV_PCM_IOCTL_TTSTAMP: 495 case SNDRV_PCM_IOCTL_HWSYNC: 496 case SNDRV_PCM_IOCTL_PREPARE: 497 case SNDRV_PCM_IOCTL_RESET: 498 case SNDRV_PCM_IOCTL_START: 499 case SNDRV_PCM_IOCTL_DROP: 500 case SNDRV_PCM_IOCTL_DRAIN: 501 case SNDRV_PCM_IOCTL_PAUSE: 502 case SNDRV_PCM_IOCTL_HW_FREE: 503 case SNDRV_PCM_IOCTL_RESUME: 504 case SNDRV_PCM_IOCTL_XRUN: 505 case SNDRV_PCM_IOCTL_LINK: 506 case SNDRV_PCM_IOCTL_UNLINK: 507 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 508 return snd_pcm_playback_ioctl1(file, substream, cmd, argp); 509 else 510 return snd_pcm_capture_ioctl1(file, substream, cmd, argp); 511 case SNDRV_PCM_IOCTL_HW_REFINE32: 512 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp); 513 case SNDRV_PCM_IOCTL_HW_PARAMS32: 514 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp); 515 case SNDRV_PCM_IOCTL_SW_PARAMS32: 516 return snd_pcm_ioctl_sw_params_compat(substream, argp); 517 case SNDRV_PCM_IOCTL_STATUS32: 518 return snd_pcm_status_user_compat(substream, argp); 519 case SNDRV_PCM_IOCTL_SYNC_PTR32: 520 return snd_pcm_ioctl_sync_ptr_compat(substream, argp); 521 case SNDRV_PCM_IOCTL_CHANNEL_INFO32: 522 return snd_pcm_ioctl_channel_info_compat(substream, argp); 523 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32: 524 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 525 case SNDRV_PCM_IOCTL_READI_FRAMES32: 526 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 527 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32: 528 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 529 case SNDRV_PCM_IOCTL_READN_FRAMES32: 530 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 531 case SNDRV_PCM_IOCTL_DELAY32: 532 return snd_pcm_ioctl_delay_compat(substream, argp); 533 case SNDRV_PCM_IOCTL_REWIND32: 534 return snd_pcm_ioctl_rewind_compat(substream, argp); 535 case SNDRV_PCM_IOCTL_FORWARD32: 536 return snd_pcm_ioctl_forward_compat(substream, argp); 537 } 538 539 return -ENOIOCTLCMD; 540 } 541