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
snd_pcm_ioctl_delay_compat(struct snd_pcm_substream * substream,s32 __user * src)25 static 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
snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream * substream,u32 __user * src)42 static 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
snd_pcm_ioctl_forward_compat(struct snd_pcm_substream * substream,u32 __user * src)59 static 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
76 struct 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
92 struct 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 */
recalculate_boundary(struct snd_pcm_runtime * runtime)107 static 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
snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream * substream,struct snd_pcm_sw_params32 __user * src)119 static 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
152 struct snd_pcm_channel_info32 {
153 u32 channel;
154 u32 offset;
155 u32 first;
156 u32 step;
157 };
158
snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream * substream,struct snd_pcm_channel_info32 __user * src)159 static 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
181 struct 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
snd_pcm_status_user_compat(struct snd_pcm_substream * substream,struct snd_pcm_status32 __user * src)196 static 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 */
snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream * substream,int refine,struct snd_pcm_hw_params32 __user * data32)224 static 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 */
268 struct snd_xferi32 {
269 s32 result;
270 u32 buf;
271 u32 frames;
272 };
273
snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream * substream,int dir,struct snd_xferi32 __user * data32)274 static 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 */
306 struct 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 */
snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream * substream,int dir,struct snd_xfern32 __user * data32)318 static 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
363 struct 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
371 struct snd_pcm_mmap_control32 {
372 u32 appl_ptr;
373 u32 avail_min;
374 };
375
376 struct 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
snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr32 __user * src)388 static 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 if (snd_BUG_ON(!runtime))
401 return -EINVAL;
402
403 if (get_user(sflags, &src->flags) ||
404 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
405 get_user(scontrol.avail_min, &src->c.control.avail_min))
406 return -EFAULT;
407 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
408 err = snd_pcm_hwsync(substream);
409 if (err < 0)
410 return err;
411 }
412 status = runtime->status;
413 control = runtime->control;
414 boundary = recalculate_boundary(runtime);
415 if (! boundary)
416 boundary = 0x7fffffff;
417 snd_pcm_stream_lock_irq(substream);
418 /* FIXME: we should consider the boundary for the sync from app */
419 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
420 control->appl_ptr = scontrol.appl_ptr;
421 else
422 scontrol.appl_ptr = control->appl_ptr % boundary;
423 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
424 control->avail_min = scontrol.avail_min;
425 else
426 scontrol.avail_min = control->avail_min;
427 sstatus.state = status->state;
428 sstatus.hw_ptr = status->hw_ptr % boundary;
429 sstatus.tstamp = status->tstamp;
430 sstatus.suspended_state = status->suspended_state;
431 snd_pcm_stream_unlock_irq(substream);
432 if (put_user(sstatus.state, &src->s.status.state) ||
433 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
434 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
435 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
436 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
437 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
438 put_user(scontrol.avail_min, &src->c.control.avail_min))
439 return -EFAULT;
440
441 return 0;
442 }
443
444
445 /*
446 */
447 enum {
448 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
449 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
450 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
451 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
452 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
453 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
454 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
455 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
456 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
457 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
458 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
459 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
460 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
461
462 };
463
snd_pcm_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)464 static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
465 {
466 struct snd_pcm_file *pcm_file;
467 struct snd_pcm_substream *substream;
468 void __user *argp = compat_ptr(arg);
469
470 pcm_file = file->private_data;
471 if (! pcm_file)
472 return -ENOTTY;
473 substream = pcm_file->substream;
474 if (! substream)
475 return -ENOTTY;
476
477 /*
478 * When PCM is used on 32bit mode, we need to disable
479 * mmap of PCM status/control records because of the size
480 * incompatibility.
481 */
482 pcm_file->no_compat_mmap = 1;
483
484 switch (cmd) {
485 case SNDRV_PCM_IOCTL_PVERSION:
486 case SNDRV_PCM_IOCTL_INFO:
487 case SNDRV_PCM_IOCTL_TSTAMP:
488 case SNDRV_PCM_IOCTL_TTSTAMP:
489 case SNDRV_PCM_IOCTL_HWSYNC:
490 case SNDRV_PCM_IOCTL_PREPARE:
491 case SNDRV_PCM_IOCTL_RESET:
492 case SNDRV_PCM_IOCTL_START:
493 case SNDRV_PCM_IOCTL_DROP:
494 case SNDRV_PCM_IOCTL_DRAIN:
495 case SNDRV_PCM_IOCTL_PAUSE:
496 case SNDRV_PCM_IOCTL_HW_FREE:
497 case SNDRV_PCM_IOCTL_RESUME:
498 case SNDRV_PCM_IOCTL_XRUN:
499 case SNDRV_PCM_IOCTL_LINK:
500 case SNDRV_PCM_IOCTL_UNLINK:
501 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
502 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
503 else
504 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
505 case SNDRV_PCM_IOCTL_HW_REFINE32:
506 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
507 case SNDRV_PCM_IOCTL_HW_PARAMS32:
508 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
509 case SNDRV_PCM_IOCTL_SW_PARAMS32:
510 return snd_pcm_ioctl_sw_params_compat(substream, argp);
511 case SNDRV_PCM_IOCTL_STATUS32:
512 return snd_pcm_status_user_compat(substream, argp);
513 case SNDRV_PCM_IOCTL_SYNC_PTR32:
514 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
515 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
516 return snd_pcm_ioctl_channel_info_compat(substream, argp);
517 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
518 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
519 case SNDRV_PCM_IOCTL_READI_FRAMES32:
520 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
521 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
522 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
523 case SNDRV_PCM_IOCTL_READN_FRAMES32:
524 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
525 case SNDRV_PCM_IOCTL_DELAY32:
526 return snd_pcm_ioctl_delay_compat(substream, argp);
527 case SNDRV_PCM_IOCTL_REWIND32:
528 return snd_pcm_ioctl_rewind_compat(substream, argp);
529 case SNDRV_PCM_IOCTL_FORWARD32:
530 return snd_pcm_ioctl_forward_compat(substream, argp);
531 }
532
533 return -ENOIOCTLCMD;
534 }
535