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 26static 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 43static 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 60static 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 77struct 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 93struct 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 unsigned char reserved[64]; 105}; 106 107/* recalcuate the boundary within 32bit */ 108static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime) 109{ 110 snd_pcm_uframes_t boundary; 111 112 if (! runtime->buffer_size) 113 return 0; 114 boundary = runtime->buffer_size; 115 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size) 116 boundary *= 2; 117 return boundary; 118} 119 120static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream, 121 struct snd_pcm_sw_params32 __user *src) 122{ 123 struct snd_pcm_sw_params params; 124 snd_pcm_uframes_t boundary; 125 int err; 126 127 memset(¶ms, 0, sizeof(params)); 128 if (get_user(params.tstamp_mode, &src->tstamp_mode) || 129 get_user(params.period_step, &src->period_step) || 130 get_user(params.sleep_min, &src->sleep_min) || 131 get_user(params.avail_min, &src->avail_min) || 132 get_user(params.xfer_align, &src->xfer_align) || 133 get_user(params.start_threshold, &src->start_threshold) || 134 get_user(params.stop_threshold, &src->stop_threshold) || 135 get_user(params.silence_threshold, &src->silence_threshold) || 136 get_user(params.silence_size, &src->silence_size)) 137 return -EFAULT; 138 /* 139 * Check silent_size parameter. Since we have 64bit boundary, 140 * silence_size must be compared with the 32bit boundary. 141 */ 142 boundary = recalculate_boundary(substream->runtime); 143 if (boundary && params.silence_size >= boundary) 144 params.silence_size = substream->runtime->boundary; 145 err = snd_pcm_sw_params(substream, ¶ms); 146 if (err < 0) 147 return err; 148 if (boundary && put_user(boundary, &src->boundary)) 149 return -EFAULT; 150 return err; 151} 152 153struct snd_pcm_channel_info32 { 154 u32 channel; 155 u32 offset; 156 u32 first; 157 u32 step; 158}; 159 160static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream, 161 struct snd_pcm_channel_info32 __user *src) 162{ 163 struct snd_pcm_channel_info info; 164 int err; 165 166 if (get_user(info.channel, &src->channel) || 167 get_user(info.offset, &src->offset) || 168 get_user(info.first, &src->first) || 169 get_user(info.step, &src->step)) 170 return -EFAULT; 171 err = snd_pcm_channel_info(substream, &info); 172 if (err < 0) 173 return err; 174 if (put_user(info.channel, &src->channel) || 175 put_user(info.offset, &src->offset) || 176 put_user(info.first, &src->first) || 177 put_user(info.step, &src->step)) 178 return -EFAULT; 179 return err; 180} 181 182struct snd_pcm_status32 { 183 s32 state; 184 struct compat_timespec trigger_tstamp; 185 struct compat_timespec tstamp; 186 u32 appl_ptr; 187 u32 hw_ptr; 188 s32 delay; 189 u32 avail; 190 u32 avail_max; 191 u32 overrange; 192 s32 suspended_state; 193 unsigned char reserved[60]; 194} __attribute__((packed)); 195 196 197static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream, 198 struct snd_pcm_status32 __user *src) 199{ 200 struct snd_pcm_status status; 201 int err; 202 203 err = snd_pcm_status(substream, &status); 204 if (err < 0) 205 return err; 206 207 if (put_user(status.state, &src->state) || 208 put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) || 209 put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) || 210 put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) || 211 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) || 212 put_user(status.appl_ptr, &src->appl_ptr) || 213 put_user(status.hw_ptr, &src->hw_ptr) || 214 put_user(status.delay, &src->delay) || 215 put_user(status.avail, &src->avail) || 216 put_user(status.avail_max, &src->avail_max) || 217 put_user(status.overrange, &src->overrange) || 218 put_user(status.suspended_state, &src->suspended_state)) 219 return -EFAULT; 220 221 return err; 222} 223 224/* both for HW_PARAMS and HW_REFINE */ 225static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream, 226 int refine, 227 struct snd_pcm_hw_params32 __user *data32) 228{ 229 struct snd_pcm_hw_params *data; 230 struct snd_pcm_runtime *runtime; 231 int err; 232 233 if (! (runtime = substream->runtime)) 234 return -ENOTTY; 235 236 /* only fifo_size is different, so just copy all */ 237 data = memdup_user(data32, sizeof(*data32)); 238 if (IS_ERR(data)) 239 return PTR_ERR(data); 240 241 if (refine) 242 err = snd_pcm_hw_refine(substream, data); 243 else 244 err = snd_pcm_hw_params(substream, data); 245 if (err < 0) 246 goto error; 247 if (copy_to_user(data32, data, sizeof(*data32)) || 248 put_user(data->fifo_size, &data32->fifo_size)) { 249 err = -EFAULT; 250 goto error; 251 } 252 253 if (! refine) { 254 unsigned int new_boundary = recalculate_boundary(runtime); 255 if (new_boundary) 256 runtime->boundary = new_boundary; 257 } 258 error: 259 kfree(data); 260 return err; 261} 262 263 264/* 265 */ 266struct snd_xferi32 { 267 s32 result; 268 u32 buf; 269 u32 frames; 270}; 271 272static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream, 273 int dir, struct snd_xferi32 __user *data32) 274{ 275 compat_caddr_t buf; 276 u32 frames; 277 int err; 278 279 if (! substream->runtime) 280 return -ENOTTY; 281 if (substream->stream != dir) 282 return -EINVAL; 283 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) 284 return -EBADFD; 285 286 if (get_user(buf, &data32->buf) || 287 get_user(frames, &data32->frames)) 288 return -EFAULT; 289 290 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 291 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames); 292 else 293 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames); 294 if (err < 0) 295 return err; 296 /* copy the result */ 297 if (put_user(err, &data32->result)) 298 return -EFAULT; 299 return 0; 300} 301 302 303/* snd_xfern needs remapping of bufs */ 304struct snd_xfern32 { 305 s32 result; 306 u32 bufs; /* this is void **; */ 307 u32 frames; 308}; 309 310/* 311 * xfern ioctl nees to copy (up to) 128 pointers on stack. 312 * although we may pass the copied pointers through f_op->ioctl, but the ioctl 313 * handler there expands again the same 128 pointers on stack, so it is better 314 * to handle the function (calling pcm_readv/writev) directly in this handler. 315 */ 316static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream, 317 int dir, struct snd_xfern32 __user *data32) 318{ 319 compat_caddr_t buf; 320 compat_caddr_t __user *bufptr; 321 u32 frames; 322 void __user **bufs; 323 int err, ch, i; 324 325 if (! substream->runtime) 326 return -ENOTTY; 327 if (substream->stream != dir) 328 return -EINVAL; 329 330 if ((ch = substream->runtime->channels) > 128) 331 return -EINVAL; 332 if (get_user(buf, &data32->bufs) || 333 get_user(frames, &data32->frames)) 334 return -EFAULT; 335 bufptr = compat_ptr(buf); 336 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL); 337 if (bufs == NULL) 338 return -ENOMEM; 339 for (i = 0; i < ch; i++) { 340 u32 ptr; 341 if (get_user(ptr, bufptr)) { 342 kfree(bufs); 343 return -EFAULT; 344 } 345 bufs[ch] = compat_ptr(ptr); 346 bufptr++; 347 } 348 if (dir == SNDRV_PCM_STREAM_PLAYBACK) 349 err = snd_pcm_lib_writev(substream, bufs, frames); 350 else 351 err = snd_pcm_lib_readv(substream, bufs, frames); 352 if (err >= 0) { 353 if (put_user(err, &data32->result)) 354 err = -EFAULT; 355 } 356 kfree(bufs); 357 return err; 358} 359 360 361struct snd_pcm_mmap_status32 { 362 s32 state; 363 s32 pad1; 364 u32 hw_ptr; 365 struct compat_timespec tstamp; 366 s32 suspended_state; 367} __attribute__((packed)); 368 369struct snd_pcm_mmap_control32 { 370 u32 appl_ptr; 371 u32 avail_min; 372}; 373 374struct snd_pcm_sync_ptr32 { 375 u32 flags; 376 union { 377 struct snd_pcm_mmap_status32 status; 378 unsigned char reserved[64]; 379 } s; 380 union { 381 struct snd_pcm_mmap_control32 control; 382 unsigned char reserved[64]; 383 } c; 384} __attribute__((packed)); 385 386static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream, 387 struct snd_pcm_sync_ptr32 __user *src) 388{ 389 struct snd_pcm_runtime *runtime = substream->runtime; 390 volatile struct snd_pcm_mmap_status *status; 391 volatile struct snd_pcm_mmap_control *control; 392 u32 sflags; 393 struct snd_pcm_mmap_control scontrol; 394 struct snd_pcm_mmap_status sstatus; 395 snd_pcm_uframes_t boundary; 396 int err; 397 398 if (snd_BUG_ON(!runtime)) 399 return -EINVAL; 400 401 if (get_user(sflags, &src->flags) || 402 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 403 get_user(scontrol.avail_min, &src->c.control.avail_min)) 404 return -EFAULT; 405 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 406 err = snd_pcm_hwsync(substream); 407 if (err < 0) 408 return err; 409 } 410 status = runtime->status; 411 control = runtime->control; 412 boundary = recalculate_boundary(runtime); 413 if (! boundary) 414 boundary = 0x7fffffff; 415 snd_pcm_stream_lock_irq(substream); 416 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) 417 control->appl_ptr = scontrol.appl_ptr; 418 else 419 scontrol.appl_ptr = control->appl_ptr % boundary; 420 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 421 control->avail_min = scontrol.avail_min; 422 else 423 scontrol.avail_min = control->avail_min; 424 sstatus.state = status->state; 425 sstatus.hw_ptr = status->hw_ptr % boundary; 426 sstatus.tstamp = status->tstamp; 427 sstatus.suspended_state = status->suspended_state; 428 snd_pcm_stream_unlock_irq(substream); 429 if (put_user(sstatus.state, &src->s.status.state) || 430 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) || 431 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) || 432 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) || 433 put_user(sstatus.suspended_state, &src->s.status.suspended_state) || 434 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) || 435 put_user(scontrol.avail_min, &src->c.control.avail_min)) 436 return -EFAULT; 437 438 return 0; 439} 440 441 442/* 443 */ 444enum { 445 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32), 446 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32), 447 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32), 448 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32), 449 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32), 450 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32), 451 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32), 452 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32), 453 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32), 454 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32), 455 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32), 456 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32), 457 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32), 458 459}; 460 461static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 462{ 463 struct snd_pcm_file *pcm_file; 464 struct snd_pcm_substream *substream; 465 void __user *argp = compat_ptr(arg); 466 467 pcm_file = file->private_data; 468 if (! pcm_file) 469 return -ENOTTY; 470 substream = pcm_file->substream; 471 if (! substream) 472 return -ENOTTY; 473 474 /* 475 * When PCM is used on 32bit mode, we need to disable 476 * mmap of PCM status/control records because of the size 477 * incompatibility. 478 */ 479 pcm_file->no_compat_mmap = 1; 480 481 switch (cmd) { 482 case SNDRV_PCM_IOCTL_PVERSION: 483 case SNDRV_PCM_IOCTL_INFO: 484 case SNDRV_PCM_IOCTL_TSTAMP: 485 case SNDRV_PCM_IOCTL_TTSTAMP: 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