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
snd_pcm_ioctl_delay_compat(struct snd_pcm_substream * substream,s32 __user * src)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
snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream * substream,u32 __user * src)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
snd_pcm_ioctl_forward_compat(struct snd_pcm_substream * substream,u32 __user * src)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 unsigned char reserved[64];
105 };
106
107 /* recalcuate the boundary within 32bit */
recalculate_boundary(struct snd_pcm_runtime * runtime)108 static 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
snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream * substream,struct snd_pcm_sw_params32 __user * src)120 static 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
153 struct snd_pcm_channel_info32 {
154 u32 channel;
155 u32 offset;
156 u32 first;
157 u32 step;
158 };
159
snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream * substream,struct snd_pcm_channel_info32 __user * src)160 static 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
182 struct 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
snd_pcm_status_user_compat(struct snd_pcm_substream * substream,struct snd_pcm_status32 __user * src)197 static 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 */
snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream * substream,int refine,struct snd_pcm_hw_params32 __user * data32)225 static 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 */
266 struct snd_xferi32 {
267 s32 result;
268 u32 buf;
269 u32 frames;
270 };
271
snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream * substream,int dir,struct snd_xferi32 __user * data32)272 static 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 */
304 struct 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 */
snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream * substream,int dir,struct snd_xfern32 __user * data32)316 static 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
361 struct 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
369 struct snd_pcm_mmap_control32 {
370 u32 appl_ptr;
371 u32 avail_min;
372 };
373
374 struct 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
snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream * substream,struct snd_pcm_sync_ptr32 __user * src)386 static 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 /* FIXME: we should consider the boundary for the sync from app */
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 */
445 enum {
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
snd_pcm_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)462 static 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_TTSTAMP:
487 case SNDRV_PCM_IOCTL_HWSYNC:
488 case SNDRV_PCM_IOCTL_PREPARE:
489 case SNDRV_PCM_IOCTL_RESET:
490 case SNDRV_PCM_IOCTL_START:
491 case SNDRV_PCM_IOCTL_DROP:
492 case SNDRV_PCM_IOCTL_DRAIN:
493 case SNDRV_PCM_IOCTL_PAUSE:
494 case SNDRV_PCM_IOCTL_HW_FREE:
495 case SNDRV_PCM_IOCTL_RESUME:
496 case SNDRV_PCM_IOCTL_XRUN:
497 case SNDRV_PCM_IOCTL_LINK:
498 case SNDRV_PCM_IOCTL_UNLINK:
499 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
500 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
501 else
502 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
503 case SNDRV_PCM_IOCTL_HW_REFINE32:
504 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
505 case SNDRV_PCM_IOCTL_HW_PARAMS32:
506 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
507 case SNDRV_PCM_IOCTL_SW_PARAMS32:
508 return snd_pcm_ioctl_sw_params_compat(substream, argp);
509 case SNDRV_PCM_IOCTL_STATUS32:
510 return snd_pcm_status_user_compat(substream, argp);
511 case SNDRV_PCM_IOCTL_SYNC_PTR32:
512 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
513 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
514 return snd_pcm_ioctl_channel_info_compat(substream, argp);
515 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
516 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
517 case SNDRV_PCM_IOCTL_READI_FRAMES32:
518 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
519 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
520 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
521 case SNDRV_PCM_IOCTL_READN_FRAMES32:
522 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
523 case SNDRV_PCM_IOCTL_DELAY32:
524 return snd_pcm_ioctl_delay_compat(substream, argp);
525 case SNDRV_PCM_IOCTL_REWIND32:
526 return snd_pcm_ioctl_rewind_compat(substream, argp);
527 case SNDRV_PCM_IOCTL_FORWARD32:
528 return snd_pcm_ioctl_forward_compat(substream, argp);
529 }
530
531 return -ENOIOCTLCMD;
532 }
533