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 25static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream, 26 s32 __user *src) 27{ 28 snd_pcm_sframes_t delay; 29 mm_segment_t fs; 30 int err; 31 32 fs = snd_enter_user(); 33 err = snd_pcm_delay(substream, &delay); 34 snd_leave_user(fs); 35 if (err < 0) 36 return err; 37 if (put_user(delay, src)) 38 return -EFAULT; 39 return err; 40} 41 42static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream, 43 u32 __user *src) 44{ 45 snd_pcm_uframes_t frames; 46 int err; 47 48 if (get_user(frames, src)) 49 return -EFAULT; 50 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 51 err = snd_pcm_playback_rewind(substream, frames); 52 else 53 err = snd_pcm_capture_rewind(substream, frames); 54 if (put_user(err, src)) 55 return -EFAULT; 56 return err < 0 ? err : 0; 57} 58 59static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream, 60 u32 __user *src) 61{ 62 snd_pcm_uframes_t frames; 63 int err; 64 65 if (get_user(frames, src)) 66 return -EFAULT; 67 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 68 err = snd_pcm_playback_forward(substream, frames); 69 else 70 err = snd_pcm_capture_forward(substream, frames); 71 if (put_user(err, src)) 72 return -EFAULT; 73 return err < 0 ? err : 0; 74} 75 76struct snd_pcm_hw_params32 { 77 u32 flags; 78 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */ 79 struct snd_mask mres[5]; /* reserved masks */ 80 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 81 struct snd_interval ires[9]; /* reserved intervals */ 82 u32 rmask; 83 u32 cmask; 84 u32 info; 85 u32 msbits; 86 u32 rate_num; 87 u32 rate_den; 88 u32 fifo_size; 89 unsigned char reserved[64]; 90}; 91 92struct snd_pcm_sw_params32 { 93 s32 tstamp_mode; 94 u32 period_step; 95 u32 sleep_min; 96 u32 avail_min; 97 u32 xfer_align; 98 u32 start_threshold; 99 u32 stop_threshold; 100 u32 silence_threshold; 101 u32 silence_size; 102 u32 boundary; 103 unsigned char reserved[64]; 104}; 105 106/* recalcuate the boundary within 32bit */ 107static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime) 108{ 109 snd_pcm_uframes_t boundary; 110 111 if (! runtime->buffer_size) 112 return 0; 113 boundary = runtime->buffer_size; 114 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) 115 boundary *= 2; 116 return boundary; 117} 118 119static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream, 120 struct snd_pcm_sw_params32 __user *src) 121{ 122 struct snd_pcm_sw_params params; 123 snd_pcm_uframes_t boundary; 124 int err; 125 126 memset(¶ms, 0, sizeof(params)); 127 if (get_user(params.tstamp_mode, &src->tstamp_mode) || 128 get_user(params.period_step, &src->period_step) || 129 get_user(params.sleep_min, &src->sleep_min) || 130 get_user(params.avail_min, &src->avail_min) || 131 get_user(params.xfer_align, &src->xfer_align) || 132 get_user(params.start_threshold, &src->start_threshold) || 133 get_user(params.stop_threshold, &src->stop_threshold) || 134 get_user(params.silence_threshold, &src->silence_threshold) || 135 get_user(params.silence_size, &src->silence_size)) 136 return -EFAULT; 137 /* 138 * Check silent_size parameter. Since we have 64bit boundary, 139 * silence_size must be compared with the 32bit boundary. 140 */ 141 boundary = recalculate_boundary(substream->runtime); 142 if (boundary && params.silence_size >= boundary) 143 params.silence_size = substream->runtime->boundary; 144 err = snd_pcm_sw_params(substream, ¶ms); 145 if (err < 0) 146 return err; 147 if (boundary && put_user(boundary, &src->boundary)) 148 return -EFAULT; 149 return err; 150} 151 152struct snd_pcm_channel_info32 { 153 u32 channel; 154 u32 offset; 155 u32 first; 156 u32 step; 157}; 158 159static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream, 160 struct snd_pcm_channel_info32 __user *src) 161{ 162 struct snd_pcm_channel_info info; 163 int err; 164 165 if (get_user(info.channel, &src->channel) || 166 get_user(info.offset, &src->offset) || 167 get_user(info.first, &src->first) || 168 get_user(info.step, &src->step)) 169 return -EFAULT; 170 err = snd_pcm_channel_info(substream, &info); 171 if (err < 0) 172 return err; 173 if (put_user(info.channel, &src->channel) || 174 put_user(info.offset, &src->offset) || 175 put_user(info.first, &src->first) || 176 put_user(info.step, &src->step)) 177 return -EFAULT; 178 return err; 179} 180 181struct snd_pcm_status32 { 182 s32 state; 183 struct compat_timespec trigger_tstamp; 184 struct compat_timespec tstamp; 185 u32 appl_ptr; 186 u32 hw_ptr; 187 s32 delay; 188 u32 avail; 189 u32 avail_max; 190 u32 overrange; 191 s32 suspended_state; 192 unsigned char reserved[60]; 193} __attribute__((packed)); 194 195 196static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, 197 struct snd_pcm_status32 __user *src) 198{ 199 struct snd_pcm_status status; 200 int err; 201 202 err = snd_pcm_status(substream, &status); 203 if (err < 0) 204 return err; 205 206 if (put_user(status.state, &src->state) || 207 put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) || 208 put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) || 209 put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) || 210 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) || 211 put_user(status.appl_ptr, &src->appl_ptr) || 212 put_user(status.hw_ptr, &src->hw_ptr) || 213 put_user(status.delay, &src->delay) || 214 put_user(status.avail, &src->avail) || 215 put_user(status.avail_max, &src->avail_max) || 216 put_user(status.overrange, &src->overrange) || 217 put_user(status.suspended_state, &src->suspended_state)) 218 return -EFAULT; 219 220 return err; 221} 222 223/* both for HW_PARAMS and HW_REFINE */ 224static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, 225 int refine, 226 struct snd_pcm_hw_params32 __user *data32) 227{ 228 struct snd_pcm_hw_params *data; 229 struct snd_pcm_runtime *runtime; 230 int err; 231 232 if (! (runtime = substream->runtime)) 233 return -ENOTTY; 234 235 data = kmalloc(sizeof(*data), GFP_KERNEL); 236 if (data == NULL) 237 return -ENOMEM; 238 /* only fifo_size is different, so just copy all */ 239 if (copy_from_user(data, data32, sizeof(*data32))) { 240 err = -EFAULT; 241 goto error; 242 } 243 if (refine) 244 err = snd_pcm_hw_refine(substream, data); 245 else 246 err = snd_pcm_hw_params(substream, data); 247 if (err < 0) 248 goto error; 249 if (copy_to_user(data32, data, sizeof(*data32)) || 250 put_user(data->fifo_size, &data32->fifo_size)) { 251 err = -EFAULT; 252 goto error; 253 } 254 255 if (! refine) { 256 unsigned int new_boundary = recalculate_boundary(runtime); 257 if (new_boundary) 258 runtime->boundary = new_boundary; 259 } 260 error: 261 kfree(data); 262 return err; 263} 264 265 266/* 267 */ 268struct snd_xferi32 { 269 s32 result; 270 u32 buf; 271 u32 frames; 272}; 273 274static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream, 275 int dir, struct snd_xferi32 __user *data32) 276{ 277 compat_caddr_t buf; 278 u32 frames; 279 int err; 280 281 if (! substream->runtime) 282 return -ENOTTY; 283 if (substream->stream != dir) 284 return -EINVAL; 285 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) 286 return -EBADFD; 287 288 if (get_user(buf, &data32->buf) || 289 get_user(frames, &data32->frames)) 290 return -EFAULT; 291 292 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 293 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames); 294 else 295 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames); 296 if (err < 0) 297 return err; 298 /* copy the result */ 299 if (put_user(err, &data32->result)) 300 return -EFAULT; 301 return 0; 302} 303 304 305/* snd_xfern needs remapping of bufs */ 306struct snd_xfern32 { 307 s32 result; 308 u32 bufs; /* this is void **; */ 309 u32 frames; 310}; 311 312/* 313 * xfern ioctl nees to copy (up to) 128 pointers on stack. 314 * although we may pass the copied pointers through f_op->ioctl, but the ioctl 315 * handler there expands again the same 128 pointers on stack, so it is better 316 * to handle the function (calling pcm_readv/writev) directly in this handler. 317 */ 318static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, 319 int dir, struct snd_xfern32 __user *data32) 320{ 321 compat_caddr_t buf; 322 compat_caddr_t __user *bufptr; 323 u32 frames; 324 void __user **bufs; 325 int err, ch, i; 326 327 if (! substream->runtime) 328 return -ENOTTY; 329 if (substream->stream != dir) 330 return -EINVAL; 331 332 if ((ch = substream->runtime->channels) > 128) 333 return -EINVAL; 334 if (get_user(buf, &data32->bufs) || 335 get_user(frames, &data32->frames)) 336 return -EFAULT; 337 bufptr = compat_ptr(buf); 338 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL); 339 if (bufs == NULL) 340 return -ENOMEM; 341 for (i = 0; i < ch; i++) { 342 u32 ptr; 343 if (get_user(ptr, bufptr)) { 344 kfree(bufs); 345 return -EFAULT; 346 } 347 bufs[ch] = compat_ptr(ptr); 348 bufptr++; 349 } 350 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 351 err = snd_pcm_lib_writev(substream, bufs, frames); 352 else 353 err = snd_pcm_lib_readv(substream, bufs, frames); 354 if (err >= 0) { 355 if (put_user(err, &data32->result)) 356 err = -EFAULT; 357 } 358 kfree(bufs); 359 return err; 360} 361 362 363struct snd_pcm_mmap_status32 { 364 s32 state; 365 s32 pad1; 366 u32 hw_ptr; 367 struct compat_timespec tstamp; 368 s32 suspended_state; 369} __attribute__((packed)); 370 371struct snd_pcm_mmap_control32 { 372 u32 appl_ptr; 373 u32 avail_min; 374}; 375 376struct snd_pcm_sync_ptr32 { 377 u32 flags; 378 union { 379 struct snd_pcm_mmap_status32 status; 380 unsigned char reserved[64]; 381 } s; 382 union { 383 struct snd_pcm_mmap_control32 control; 384 unsigned char reserved[64]; 385 } c; 386} __attribute__((packed)); 387 388static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, 389 struct snd_pcm_sync_ptr32 __user *src) 390{ 391 struct snd_pcm_runtime *runtime = substream->runtime; 392 volatile struct snd_pcm_mmap_status *status; 393 volatile struct snd_pcm_mmap_control *control; 394 u32 sflags; 395 struct snd_pcm_mmap_control scontrol; 396 struct snd_pcm_mmap_status sstatus; 397 snd_pcm_uframes_t boundary; 398 int err; 399 400 snd_assert(runtime, return -EINVAL); 401 402 if (get_user(sflags, &src->flags) || 403 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 404 get_user(scontrol.avail_min, &src->c.control.avail_min)) 405 return -EFAULT; 406 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 407 err = snd_pcm_hwsync(substream); 408 if (err < 0) 409 return err; 410 } 411 status = runtime->status; 412 control = runtime->control; 413 boundary = recalculate_boundary(runtime); 414 if (! boundary) 415 boundary = 0x7fffffff; 416 snd_pcm_stream_lock_irq(substream); 417 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) 418 control->appl_ptr = scontrol.appl_ptr; 419 else 420 scontrol.appl_ptr = control->appl_ptr % boundary; 421 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 422 control->avail_min = scontrol.avail_min; 423 else 424 scontrol.avail_min = control->avail_min; 425 sstatus.state = status->state; 426 sstatus.hw_ptr = status->hw_ptr % boundary; 427 sstatus.tstamp = status->tstamp; 428 sstatus.suspended_state = status->suspended_state; 429 snd_pcm_stream_unlock_irq(substream); 430 if (put_user(sstatus.state, &src->s.status.state) || 431 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || 432 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) || 433 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) || 434 put_user(sstatus.suspended_state, &src->s.status.suspended_state) || 435 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 436 put_user(scontrol.avail_min, &src->c.control.avail_min)) 437 return -EFAULT; 438 439 return 0; 440} 441 442 443/* 444 */ 445enum { 446 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32), 447 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), 448 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), 449 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), 450 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), 451 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), 452 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), 453 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32), 454 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32), 455 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32), 456 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32), 457 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32), 458 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32), 459 460}; 461 462static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 463{ 464 struct snd_pcm_file *pcm_file; 465 struct snd_pcm_substream *substream; 466 void __user *argp = compat_ptr(arg); 467 468 pcm_file = file->private_data; 469 if (! pcm_file) 470 return -ENOTTY; 471 substream = pcm_file->substream; 472 if (! substream) 473 return -ENOTTY; 474 475 /* 476 * When PCM is used on 32bit mode, we need to disable 477 * mmap of PCM status/control records because of the size 478 * incompatibility. 479 */ 480 pcm_file->no_compat_mmap = 1; 481 482 switch (cmd) { 483 case SNDRV_PCM_IOCTL_PVERSION: 484 case SNDRV_PCM_IOCTL_INFO: 485 case SNDRV_PCM_IOCTL_TSTAMP: 486 case SNDRV_PCM_IOCTL_HWSYNC: 487 case SNDRV_PCM_IOCTL_PREPARE: 488 case SNDRV_PCM_IOCTL_RESET: 489 case SNDRV_PCM_IOCTL_START: 490 case SNDRV_PCM_IOCTL_DROP: 491 case SNDRV_PCM_IOCTL_DRAIN: 492 case SNDRV_PCM_IOCTL_PAUSE: 493 case SNDRV_PCM_IOCTL_HW_FREE: 494 case SNDRV_PCM_IOCTL_RESUME: 495 case SNDRV_PCM_IOCTL_XRUN: 496 case SNDRV_PCM_IOCTL_LINK: 497 case SNDRV_PCM_IOCTL_UNLINK: 498 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 499 return snd_pcm_playback_ioctl1(file, substream, cmd, argp); 500 else 501 return snd_pcm_capture_ioctl1(file, substream, cmd, argp); 502 case SNDRV_PCM_IOCTL_HW_REFINE32: 503 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp); 504 case SNDRV_PCM_IOCTL_HW_PARAMS32: 505 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp); 506 case SNDRV_PCM_IOCTL_SW_PARAMS32: 507 return snd_pcm_ioctl_sw_params_compat(substream, argp); 508 case SNDRV_PCM_IOCTL_STATUS32: 509 return snd_pcm_status_user_compat(substream, argp); 510 case SNDRV_PCM_IOCTL_SYNC_PTR32: 511 return snd_pcm_ioctl_sync_ptr_compat(substream, argp); 512 case SNDRV_PCM_IOCTL_CHANNEL_INFO32: 513 return snd_pcm_ioctl_channel_info_compat(substream, argp); 514 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32: 515 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 516 case SNDRV_PCM_IOCTL_READI_FRAMES32: 517 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 518 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32: 519 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp); 520 case SNDRV_PCM_IOCTL_READN_FRAMES32: 521 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp); 522 case SNDRV_PCM_IOCTL_DELAY32: 523 return snd_pcm_ioctl_delay_compat(substream, argp); 524 case SNDRV_PCM_IOCTL_REWIND32: 525 return snd_pcm_ioctl_rewind_compat(substream, argp); 526 case SNDRV_PCM_IOCTL_FORWARD32: 527 return snd_pcm_ioctl_forward_compat(substream, argp); 528 } 529 530 return -ENOIOCTLCMD; 531} 532