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 #include <sound/driver.h>
22 #include <linux/time.h>
23 #include <linux/slab.h>
24 #include <linux/compat.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/minors.h>
28 #include "ioctl32.h"
29
30
31 /* wrapper for sndrv_pcm_[us]frames */
32 struct sndrv_pcm_sframes_str {
33 sndrv_pcm_sframes_t val;
34 };
35 struct sndrv_pcm_sframes_str32 {
36 s32 val;
37 };
38 struct sndrv_pcm_uframes_str {
39 sndrv_pcm_uframes_t val;
40 };
41 struct sndrv_pcm_uframes_str32 {
42 u32 val;
43 };
44
45 #define CVT_sndrv_pcm_sframes_str() { COPY_CVT(val); }
46 #define CVT_sndrv_pcm_uframes_str() { COPY_CVT(val); }
47
48
49 struct sndrv_pcm_hw_params32 {
50 u32 flags;
51 struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
52 struct sndrv_mask mres[5]; /* reserved masks */
53 struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
54 struct sndrv_interval ires[9]; /* reserved intervals */
55 u32 rmask;
56 u32 cmask;
57 u32 info;
58 u32 msbits;
59 u32 rate_num;
60 u32 rate_den;
61 u32 fifo_size;
62 unsigned char reserved[64];
63 } __attribute__((packed));
64
65 struct sndrv_pcm_sw_params32 {
66 s32 tstamp_mode;
67 u32 period_step;
68 u32 sleep_min;
69 u32 avail_min;
70 u32 xfer_align;
71 u32 start_threshold;
72 u32 stop_threshold;
73 u32 silence_threshold;
74 u32 silence_size;
75 u32 boundary;
76 unsigned char reserved[64];
77 } __attribute__((packed));
78
79 #define CVT_sndrv_pcm_sw_params()\
80 {\
81 COPY(tstamp_mode);\
82 COPY(period_step);\
83 COPY(sleep_min);\
84 COPY_CVT(avail_min);\
85 COPY_CVT(xfer_align);\
86 COPY_CVT(start_threshold);\
87 COPY_CVT(stop_threshold);\
88 COPY_CVT(silence_threshold);\
89 COPY_CVT(silence_size);\
90 COPY_CVT(boundary);\
91 }
92
93 struct sndrv_pcm_channel_info32 {
94 u32 channel;
95 u32 offset;
96 u32 first;
97 u32 step;
98 } __attribute__((packed));
99
100 #define CVT_sndrv_pcm_channel_info()\
101 {\
102 COPY(channel);\
103 COPY_CVT(offset);\
104 COPY(first);\
105 COPY(step);\
106 }
107
108 struct sndrv_pcm_status32 {
109 s32 state;
110 struct compat_timespec trigger_tstamp;
111 struct compat_timespec tstamp;
112 u32 appl_ptr;
113 u32 hw_ptr;
114 s32 delay;
115 u32 avail;
116 u32 avail_max;
117 u32 overrange;
118 s32 suspended_state;
119 unsigned char reserved[60];
120 } __attribute__((packed));
121
122 #define CVT_sndrv_pcm_status()\
123 {\
124 COPY(state);\
125 COPY_CVT(trigger_tstamp.tv_sec);\
126 COPY_CVT(trigger_tstamp.tv_nsec);\
127 COPY_CVT(tstamp.tv_sec);\
128 COPY_CVT(tstamp.tv_nsec);\
129 COPY_CVT(appl_ptr);\
130 COPY_CVT(hw_ptr);\
131 COPY_CVT(delay);\
132 COPY_CVT(avail);\
133 COPY_CVT(avail_max);\
134 COPY_CVT(overrange);\
135 COPY(suspended_state);\
136 }
137
138 DEFINE_ALSA_IOCTL(pcm_uframes_str);
139 DEFINE_ALSA_IOCTL(pcm_sframes_str);
140 DEFINE_ALSA_IOCTL(pcm_sw_params);
141 DEFINE_ALSA_IOCTL(pcm_channel_info);
142 DEFINE_ALSA_IOCTL(pcm_status);
143
144 /* sanity device check */
145 extern int snd_major;
146 static int sanity_check_pcm(struct file *file)
147 {
148 unsigned short minor;
149 if (imajor(file->f_dentry->d_inode) != snd_major)
150 return -ENOTTY;
151 minor = iminor(file->f_dentry->d_inode);
152 if (minor >= 256 ||
153 minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK)
154 return -ENOTTY;
155 return 0;
156 }
157
158 /* recalcuate the boundary within 32bit */
159 static void recalculate_boundary(snd_pcm_runtime_t *runtime)
160 {
161 if (! runtime->buffer_size)
162 return;
163 runtime->boundary = runtime->buffer_size;
164 while (runtime->boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
165 runtime->boundary *= 2;
166 }
167
168 /* both for HW_PARAMS and HW_REFINE */
169 static int _snd_ioctl32_pcm_hw_params(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
170 {
171 struct sndrv_pcm_hw_params32 __user *data32;
172 struct sndrv_pcm_hw_params *data;
173 snd_pcm_file_t *pcm_file;
174 snd_pcm_substream_t *substream;
175 snd_pcm_runtime_t *runtime;
176 int err;
177
178 if (sanity_check_pcm(file))
179 return -ENOTTY;
180 if (! (pcm_file = file->private_data))
181 return -ENOTTY;
182 if (! (substream = pcm_file->substream))
183 return -ENOTTY;
184 if (! (runtime = substream->runtime))
185 return -ENOTTY;
186
187 data32 = compat_ptr(arg);
188 data = kmalloc(sizeof(*data), GFP_KERNEL);
189 if (data == NULL)
190 return -ENOMEM;
191 if (copy_from_user(data, data32, sizeof(*data32))) {
192 err = -EFAULT;
193 goto error;
194 }
195 if (native_ctl == SNDRV_PCM_IOCTL_HW_REFINE)
196 err = snd_pcm_hw_refine(substream, data);
197 else
198 err = snd_pcm_hw_params(substream, data);
199 if (err < 0)
200 goto error;
201 if (copy_to_user(data32, data, sizeof(*data32)) ||
202 __put_user((u32)data->fifo_size, &data32->fifo_size)) {
203 err = -EFAULT;
204 goto error;
205 }
206
207 if (native_ctl == SNDRV_PCM_IOCTL_HW_PARAMS)
208 recalculate_boundary(runtime);
209 error:
210 kfree(data);
211 return err;
212 }
213
214
215 /*
216 */
217 struct sndrv_xferi32 {
218 s32 result;
219 u32 buf;
220 u32 frames;
221 } __attribute__((packed));
222
223 static int _snd_ioctl32_xferi(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
224 {
225 struct sndrv_xferi32 data32;
226 struct sndrv_xferi __user *data;
227 snd_pcm_sframes_t result;
228 int err;
229
230 if (copy_from_user(&data32, (void __user *)arg, sizeof(data32)))
231 return -EFAULT;
232 data = compat_alloc_user_space(sizeof(*data));
233 if (put_user((snd_pcm_sframes_t)data32.result, &data->result) ||
234 __put_user(compat_ptr(data32.buf), &data->buf) ||
235 __put_user((snd_pcm_uframes_t)data32.frames, &data->frames))
236 return -EFAULT;
237 err = file->f_op->ioctl(file->f_dentry->d_inode, file, native_ctl, (unsigned long)data);
238 if (err < 0)
239 return err;
240 /* copy the result */
241 if (__get_user(result, &data->result))
242 return -EFAULT;
243 data32.result = result;
244 if (copy_to_user((void __user *)arg, &data32, sizeof(data32)))
245 return -EFAULT;
246 return 0;
247 }
248
249
250 /* snd_xfern needs remapping of bufs */
251 struct sndrv_xfern32 {
252 s32 result;
253 u32 bufs; /* this is void **; */
254 u32 frames;
255 } __attribute__((packed));
256
257 /*
258 * xfern ioctl nees to copy (up to) 128 pointers on stack.
259 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
260 * handler there expands again the same 128 pointers on stack, so it is better
261 * to handle the function (calling pcm_readv/writev) directly in this handler.
262 */
263 static int _snd_ioctl32_xfern(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *file, unsigned int native_ctl)
264 {
265 snd_pcm_file_t *pcm_file;
266 snd_pcm_substream_t *substream;
267 struct sndrv_xfern32 __user *srcptr = compat_ptr(arg);
268 struct sndrv_xfern32 data32;
269 void __user **bufs;
270 int err = 0, ch, i;
271 u32 __user *bufptr;
272
273 if (sanity_check_pcm(file))
274 return -ENOTTY;
275 if (! (pcm_file = file->private_data))
276 return -ENOTTY;
277 if (! (substream = pcm_file->substream))
278 return -ENOTTY;
279 if (! substream->runtime)
280 return -ENOTTY;
281
282 /* check validty of the command */
283 switch (native_ctl) {
284 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
285 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
286 return -EINVAL;
287 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
288 return -EBADFD;
289 break;
290 case SNDRV_PCM_IOCTL_READN_FRAMES:
291 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
292 return -EINVAL;
293 break;
294 }
295 if ((ch = substream->runtime->channels) > 128)
296 return -EINVAL;
297 if (copy_from_user(&data32, (void __user *)arg, sizeof(data32)))
298 return -EFAULT;
299 bufptr = compat_ptr(data32.bufs);
300 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
301 if (bufs == NULL)
302 return -ENOMEM;
303 for (i = 0; i < ch; i++) {
304 u32 ptr;
305 if (get_user(ptr, bufptr)) {
306 kfree(bufs);
307 return -EFAULT;
308 }
309 bufs[ch] = compat_ptr(ptr);
310 bufptr++;
311 }
312 switch (native_ctl) {
313 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
314 err = snd_pcm_lib_writev(substream, bufs, data32.frames);
315 break;
316 case SNDRV_PCM_IOCTL_READN_FRAMES:
317 err = snd_pcm_lib_readv(substream, bufs, data32.frames);
318 break;
319 }
320 if (err >= 0) {
321 if (put_user(err, &srcptr->result))
322 err = -EFAULT;
323 }
324 kfree(bufs);
325 return err;
326 }
327
328
329 struct sndrv_pcm_mmap_status32 {
330 s32 state;
331 s32 pad1;
332 u32 hw_ptr;
333 struct compat_timespec tstamp;
334 s32 suspended_state;
335 } __attribute__((packed));
336
337 struct sndrv_pcm_mmap_control32 {
338 u32 appl_ptr;
339 u32 avail_min;
340 } __attribute__((packed));
341
342 struct sndrv_pcm_sync_ptr32 {
343 u32 flags;
344 union {
345 struct sndrv_pcm_mmap_status32 status;
346 unsigned char reserved[64];
347 } s;
348 union {
349 struct sndrv_pcm_mmap_control32 control;
350 unsigned char reserved[64];
351 } c;
352 } __attribute__((packed));
353
354 #define CVT_sndrv_pcm_sync_ptr()\
355 {\
356 COPY(flags);\
357 COPY(s.status.state);\
358 COPY(s.status.pad1);\
359 COPY_CVT(s.status.hw_ptr);\
360 COPY_CVT(s.status.tstamp.tv_sec);\
361 COPY_CVT(s.status.tstamp.tv_nsec);\
362 COPY(s.status.suspended_state);\
363 COPY_CVT(c.control.appl_ptr);\
364 COPY_CVT(c.control.avail_min);\
365 }
366
367 DEFINE_ALSA_IOCTL(pcm_sync_ptr);
368
369 /*
370 */
371
372 DEFINE_ALSA_IOCTL_ENTRY(pcm_hw_refine, pcm_hw_params, SNDRV_PCM_IOCTL_HW_REFINE);
373 DEFINE_ALSA_IOCTL_ENTRY(pcm_hw_params, pcm_hw_params, SNDRV_PCM_IOCTL_HW_PARAMS);
374 DEFINE_ALSA_IOCTL_ENTRY(pcm_sw_params, pcm_sw_params, SNDRV_PCM_IOCTL_SW_PARAMS);
375 DEFINE_ALSA_IOCTL_ENTRY(pcm_status, pcm_status, SNDRV_PCM_IOCTL_STATUS);
376 DEFINE_ALSA_IOCTL_ENTRY(pcm_delay, pcm_sframes_str, SNDRV_PCM_IOCTL_DELAY);
377 DEFINE_ALSA_IOCTL_ENTRY(pcm_channel_info, pcm_channel_info, SNDRV_PCM_IOCTL_CHANNEL_INFO);
378 DEFINE_ALSA_IOCTL_ENTRY(pcm_rewind, pcm_uframes_str, SNDRV_PCM_IOCTL_REWIND);
379 DEFINE_ALSA_IOCTL_ENTRY(pcm_forward, pcm_uframes_str, SNDRV_PCM_IOCTL_FORWARD);
380 DEFINE_ALSA_IOCTL_ENTRY(pcm_readi, xferi, SNDRV_PCM_IOCTL_READI_FRAMES);
381 DEFINE_ALSA_IOCTL_ENTRY(pcm_writei, xferi, SNDRV_PCM_IOCTL_WRITEI_FRAMES);
382 DEFINE_ALSA_IOCTL_ENTRY(pcm_readn, xfern, SNDRV_PCM_IOCTL_READN_FRAMES);
383 DEFINE_ALSA_IOCTL_ENTRY(pcm_writen, xfern, SNDRV_PCM_IOCTL_WRITEN_FRAMES);
384 DEFINE_ALSA_IOCTL_ENTRY(pcm_sync_ptr, pcm_sync_ptr, SNDRV_PCM_IOCTL_SYNC_PTR);
385
386
387 /*
388 * When PCM is used on 32bit mode, we need to disable
389 * mmap of PCM status/control records because of the size
390 * incompatibility.
391 *
392 * Since INFO ioctl is always called at first, we mark the
393 * mmap-disabling in this ioctl wrapper.
394 */
395 static int snd_pcm_info_ioctl32(unsigned int fd, unsigned int cmd, unsigned long arg, struct file *filp)
396 {
397 snd_pcm_file_t *pcm_file;
398 snd_pcm_substream_t *substream;
399 if (! filp->f_op || ! filp->f_op->ioctl)
400 return -ENOTTY;
401 pcm_file = filp->private_data;
402 if (! pcm_file)
403 return -ENOTTY;
404 substream = pcm_file->substream;
405 if (! substream)
406 return -ENOTTY;
407 substream->no_mmap_ctrl = 1;
408 return filp->f_op->ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
409 }
410
411 /*
412 */
413 #define AP(x) snd_ioctl32_##x
414
415 enum {
416 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
417 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
418 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
419 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
420 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
421 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_pcm_channel_info32),
422 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
423 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
424 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct sndrv_xferi32),
425 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
426 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
427 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
428 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),
429
430 };
431
432 struct ioctl32_mapper pcm_mappers[] = {
433 MAP_COMPAT(SNDRV_PCM_IOCTL_PVERSION),
434 /* MAP_COMPAT(SNDRV_PCM_IOCTL_INFO), */
435 { SNDRV_PCM_IOCTL_INFO, snd_pcm_info_ioctl32 },
436 MAP_COMPAT(SNDRV_PCM_IOCTL_TSTAMP),
437 { SNDRV_PCM_IOCTL_HW_REFINE32, AP(pcm_hw_refine) },
438 { SNDRV_PCM_IOCTL_HW_PARAMS32, AP(pcm_hw_params) },
439 MAP_COMPAT(SNDRV_PCM_IOCTL_HW_FREE),
440 { SNDRV_PCM_IOCTL_SW_PARAMS32, AP(pcm_sw_params) },
441 { SNDRV_PCM_IOCTL_STATUS32, AP(pcm_status) },
442 { SNDRV_PCM_IOCTL_DELAY32, AP(pcm_delay) },
443 MAP_COMPAT(SNDRV_PCM_IOCTL_HWSYNC),
444 { SNDRV_PCM_IOCTL_SYNC_PTR32, AP(pcm_sync_ptr) },
445 { SNDRV_PCM_IOCTL_CHANNEL_INFO32, AP(pcm_channel_info) },
446 MAP_COMPAT(SNDRV_PCM_IOCTL_PREPARE),
447 MAP_COMPAT(SNDRV_PCM_IOCTL_RESET),
448 MAP_COMPAT(SNDRV_PCM_IOCTL_START),
449 MAP_COMPAT(SNDRV_PCM_IOCTL_DROP),
450 MAP_COMPAT(SNDRV_PCM_IOCTL_DRAIN),
451 MAP_COMPAT(SNDRV_PCM_IOCTL_PAUSE),
452 { SNDRV_PCM_IOCTL_REWIND32, AP(pcm_rewind) },
453 MAP_COMPAT(SNDRV_PCM_IOCTL_RESUME),
454 MAP_COMPAT(SNDRV_PCM_IOCTL_XRUN),
455 { SNDRV_PCM_IOCTL_FORWARD32, AP(pcm_forward) },
456 { SNDRV_PCM_IOCTL_WRITEI_FRAMES32, AP(pcm_writei) },
457 { SNDRV_PCM_IOCTL_READI_FRAMES32, AP(pcm_readi) },
458 { SNDRV_PCM_IOCTL_WRITEN_FRAMES32, AP(pcm_writen) },
459 { SNDRV_PCM_IOCTL_READN_FRAMES32, AP(pcm_readn) },
460 MAP_COMPAT(SNDRV_PCM_IOCTL_LINK),
461 MAP_COMPAT(SNDRV_PCM_IOCTL_UNLINK),
462
463 { 0 },
464 };
465
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