1 /**
2 * \file drm_ioc32.c
3 *
4 * 32-bit ioctl compatibility routines for the DRM.
5 *
6 * \author Paul Mackerras <paulus@samba.org>
7 *
8 * Copyright (C) Paul Mackerras 2005.
9 * All Rights Reserved.
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice (including the next
19 * paragraph) shall be included in all copies or substantial portions of the
20 * Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 * IN THE SOFTWARE.
29 */
30 #include <linux/compat.h>
31
32 #include "drmP.h"
33 #include "drm_core.h"
34
35 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
36 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
37 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
38 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
39 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
40
41 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
42 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
43 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
44 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
45 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
46 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
47 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
48
49 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
50
51 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
52 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
53
54 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
55 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
56
57 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
58 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
59 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
60 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
61 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
62 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
63
64 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
65 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
66
67 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
68
69 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
70
71 typedef struct drm_version_32 {
72 int version_major; /**< Major version */
73 int version_minor; /**< Minor version */
74 int version_patchlevel; /**< Patch level */
75 u32 name_len; /**< Length of name buffer */
76 u32 name; /**< Name of driver */
77 u32 date_len; /**< Length of date buffer */
78 u32 date; /**< User-space buffer to hold date */
79 u32 desc_len; /**< Length of desc buffer */
80 u32 desc; /**< User-space buffer to hold desc */
81 } drm_version32_t;
82
compat_drm_version(struct file * file,unsigned int cmd,unsigned long arg)83 static int compat_drm_version(struct file *file, unsigned int cmd,
84 unsigned long arg)
85 {
86 drm_version32_t v32;
87 struct drm_version __user *version;
88 int err;
89
90 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
91 return -EFAULT;
92
93 version = compat_alloc_user_space(sizeof(*version));
94 if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
95 return -EFAULT;
96 if (__put_user(v32.name_len, &version->name_len)
97 || __put_user((void __user *)(unsigned long)v32.name,
98 &version->name)
99 || __put_user(v32.date_len, &version->date_len)
100 || __put_user((void __user *)(unsigned long)v32.date,
101 &version->date)
102 || __put_user(v32.desc_len, &version->desc_len)
103 || __put_user((void __user *)(unsigned long)v32.desc,
104 &version->desc))
105 return -EFAULT;
106
107 err = drm_ioctl(file->f_path.dentry->d_inode, file,
108 DRM_IOCTL_VERSION, (unsigned long)version);
109 if (err)
110 return err;
111
112 if (__get_user(v32.version_major, &version->version_major)
113 || __get_user(v32.version_minor, &version->version_minor)
114 || __get_user(v32.version_patchlevel, &version->version_patchlevel)
115 || __get_user(v32.name_len, &version->name_len)
116 || __get_user(v32.date_len, &version->date_len)
117 || __get_user(v32.desc_len, &version->desc_len))
118 return -EFAULT;
119
120 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
121 return -EFAULT;
122 return 0;
123 }
124
125 typedef struct drm_unique32 {
126 u32 unique_len; /**< Length of unique */
127 u32 unique; /**< Unique name for driver instantiation */
128 } drm_unique32_t;
129
compat_drm_getunique(struct file * file,unsigned int cmd,unsigned long arg)130 static int compat_drm_getunique(struct file *file, unsigned int cmd,
131 unsigned long arg)
132 {
133 drm_unique32_t uq32;
134 struct drm_unique __user *u;
135 int err;
136
137 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
138 return -EFAULT;
139
140 u = compat_alloc_user_space(sizeof(*u));
141 if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
142 return -EFAULT;
143 if (__put_user(uq32.unique_len, &u->unique_len)
144 || __put_user((void __user *)(unsigned long)uq32.unique,
145 &u->unique))
146 return -EFAULT;
147
148 err = drm_ioctl(file->f_path.dentry->d_inode, file,
149 DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
150 if (err)
151 return err;
152
153 if (__get_user(uq32.unique_len, &u->unique_len))
154 return -EFAULT;
155 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
156 return -EFAULT;
157 return 0;
158 }
159
compat_drm_setunique(struct file * file,unsigned int cmd,unsigned long arg)160 static int compat_drm_setunique(struct file *file, unsigned int cmd,
161 unsigned long arg)
162 {
163 drm_unique32_t uq32;
164 struct drm_unique __user *u;
165
166 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
167 return -EFAULT;
168
169 u = compat_alloc_user_space(sizeof(*u));
170 if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
171 return -EFAULT;
172 if (__put_user(uq32.unique_len, &u->unique_len)
173 || __put_user((void __user *)(unsigned long)uq32.unique,
174 &u->unique))
175 return -EFAULT;
176
177 return drm_ioctl(file->f_path.dentry->d_inode, file,
178 DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
179 }
180
181 typedef struct drm_map32 {
182 u32 offset; /**< Requested physical address (0 for SAREA)*/
183 u32 size; /**< Requested physical size (bytes) */
184 enum drm_map_type type; /**< Type of memory to map */
185 enum drm_map_flags flags; /**< Flags */
186 u32 handle; /**< User-space: "Handle" to pass to mmap() */
187 int mtrr; /**< MTRR slot used */
188 } drm_map32_t;
189
compat_drm_getmap(struct file * file,unsigned int cmd,unsigned long arg)190 static int compat_drm_getmap(struct file *file, unsigned int cmd,
191 unsigned long arg)
192 {
193 drm_map32_t __user *argp = (void __user *)arg;
194 drm_map32_t m32;
195 struct drm_map __user *map;
196 int idx, err;
197 void *handle;
198
199 if (get_user(idx, &argp->offset))
200 return -EFAULT;
201
202 map = compat_alloc_user_space(sizeof(*map));
203 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
204 return -EFAULT;
205 if (__put_user(idx, &map->offset))
206 return -EFAULT;
207
208 err = drm_ioctl(file->f_path.dentry->d_inode, file,
209 DRM_IOCTL_GET_MAP, (unsigned long)map);
210 if (err)
211 return err;
212
213 if (__get_user(m32.offset, &map->offset)
214 || __get_user(m32.size, &map->size)
215 || __get_user(m32.type, &map->type)
216 || __get_user(m32.flags, &map->flags)
217 || __get_user(handle, &map->handle)
218 || __get_user(m32.mtrr, &map->mtrr))
219 return -EFAULT;
220
221 m32.handle = (unsigned long)handle;
222 if (copy_to_user(argp, &m32, sizeof(m32)))
223 return -EFAULT;
224 return 0;
225
226 }
227
compat_drm_addmap(struct file * file,unsigned int cmd,unsigned long arg)228 static int compat_drm_addmap(struct file *file, unsigned int cmd,
229 unsigned long arg)
230 {
231 drm_map32_t __user *argp = (void __user *)arg;
232 drm_map32_t m32;
233 struct drm_map __user *map;
234 int err;
235 void *handle;
236
237 if (copy_from_user(&m32, argp, sizeof(m32)))
238 return -EFAULT;
239
240 map = compat_alloc_user_space(sizeof(*map));
241 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
242 return -EFAULT;
243 if (__put_user(m32.offset, &map->offset)
244 || __put_user(m32.size, &map->size)
245 || __put_user(m32.type, &map->type)
246 || __put_user(m32.flags, &map->flags))
247 return -EFAULT;
248
249 err = drm_ioctl(file->f_path.dentry->d_inode, file,
250 DRM_IOCTL_ADD_MAP, (unsigned long)map);
251 if (err)
252 return err;
253
254 if (__get_user(m32.offset, &map->offset)
255 || __get_user(m32.mtrr, &map->mtrr)
256 || __get_user(handle, &map->handle))
257 return -EFAULT;
258
259 m32.handle = (unsigned long)handle;
260 if (m32.handle != (unsigned long)handle && printk_ratelimit())
261 printk(KERN_ERR "compat_drm_addmap truncated handle"
262 " %p for type %d offset %x\n",
263 handle, m32.type, m32.offset);
264
265 if (copy_to_user(argp, &m32, sizeof(m32)))
266 return -EFAULT;
267
268 return 0;
269 }
270
compat_drm_rmmap(struct file * file,unsigned int cmd,unsigned long arg)271 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
272 unsigned long arg)
273 {
274 drm_map32_t __user *argp = (void __user *)arg;
275 struct drm_map __user *map;
276 u32 handle;
277
278 if (get_user(handle, &argp->handle))
279 return -EFAULT;
280
281 map = compat_alloc_user_space(sizeof(*map));
282 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
283 return -EFAULT;
284 if (__put_user((void *)(unsigned long)handle, &map->handle))
285 return -EFAULT;
286
287 return drm_ioctl(file->f_path.dentry->d_inode, file,
288 DRM_IOCTL_RM_MAP, (unsigned long)map);
289 }
290
291 typedef struct drm_client32 {
292 int idx; /**< Which client desired? */
293 int auth; /**< Is client authenticated? */
294 u32 pid; /**< Process ID */
295 u32 uid; /**< User ID */
296 u32 magic; /**< Magic */
297 u32 iocs; /**< Ioctl count */
298 } drm_client32_t;
299
compat_drm_getclient(struct file * file,unsigned int cmd,unsigned long arg)300 static int compat_drm_getclient(struct file *file, unsigned int cmd,
301 unsigned long arg)
302 {
303 drm_client32_t c32;
304 drm_client32_t __user *argp = (void __user *)arg;
305 struct drm_client __user *client;
306 int idx, err;
307
308 if (get_user(idx, &argp->idx))
309 return -EFAULT;
310
311 client = compat_alloc_user_space(sizeof(*client));
312 if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
313 return -EFAULT;
314 if (__put_user(idx, &client->idx))
315 return -EFAULT;
316
317 err = drm_ioctl(file->f_path.dentry->d_inode, file,
318 DRM_IOCTL_GET_CLIENT, (unsigned long)client);
319 if (err)
320 return err;
321
322 if (__get_user(c32.auth, &client->auth)
323 || __get_user(c32.pid, &client->pid)
324 || __get_user(c32.uid, &client->uid)
325 || __get_user(c32.magic, &client->magic)
326 || __get_user(c32.iocs, &client->iocs))
327 return -EFAULT;
328
329 if (copy_to_user(argp, &c32, sizeof(c32)))
330 return -EFAULT;
331 return 0;
332 }
333
334 typedef struct drm_stats32 {
335 u32 count;
336 struct {
337 u32 value;
338 enum drm_stat_type type;
339 } data[15];
340 } drm_stats32_t;
341
compat_drm_getstats(struct file * file,unsigned int cmd,unsigned long arg)342 static int compat_drm_getstats(struct file *file, unsigned int cmd,
343 unsigned long arg)
344 {
345 drm_stats32_t s32;
346 drm_stats32_t __user *argp = (void __user *)arg;
347 struct drm_stats __user *stats;
348 int i, err;
349
350 stats = compat_alloc_user_space(sizeof(*stats));
351 if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
352 return -EFAULT;
353
354 err = drm_ioctl(file->f_path.dentry->d_inode, file,
355 DRM_IOCTL_GET_STATS, (unsigned long)stats);
356 if (err)
357 return err;
358
359 if (__get_user(s32.count, &stats->count))
360 return -EFAULT;
361 for (i = 0; i < 15; ++i)
362 if (__get_user(s32.data[i].value, &stats->data[i].value)
363 || __get_user(s32.data[i].type, &stats->data[i].type))
364 return -EFAULT;
365
366 if (copy_to_user(argp, &s32, sizeof(s32)))
367 return -EFAULT;
368 return 0;
369 }
370
371 typedef struct drm_buf_desc32 {
372 int count; /**< Number of buffers of this size */
373 int size; /**< Size in bytes */
374 int low_mark; /**< Low water mark */
375 int high_mark; /**< High water mark */
376 int flags;
377 u32 agp_start; /**< Start address in the AGP aperture */
378 } drm_buf_desc32_t;
379
compat_drm_addbufs(struct file * file,unsigned int cmd,unsigned long arg)380 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
381 unsigned long arg)
382 {
383 drm_buf_desc32_t __user *argp = (void __user *)arg;
384 struct drm_buf_desc __user *buf;
385 int err;
386 unsigned long agp_start;
387
388 buf = compat_alloc_user_space(sizeof(*buf));
389 if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
390 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
391 return -EFAULT;
392
393 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
394 || __get_user(agp_start, &argp->agp_start)
395 || __put_user(agp_start, &buf->agp_start))
396 return -EFAULT;
397
398 err = drm_ioctl(file->f_path.dentry->d_inode, file,
399 DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
400 if (err)
401 return err;
402
403 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
404 || __get_user(agp_start, &buf->agp_start)
405 || __put_user(agp_start, &argp->agp_start))
406 return -EFAULT;
407
408 return 0;
409 }
410
compat_drm_markbufs(struct file * file,unsigned int cmd,unsigned long arg)411 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
412 unsigned long arg)
413 {
414 drm_buf_desc32_t b32;
415 drm_buf_desc32_t __user *argp = (void __user *)arg;
416 struct drm_buf_desc __user *buf;
417
418 if (copy_from_user(&b32, argp, sizeof(b32)))
419 return -EFAULT;
420
421 buf = compat_alloc_user_space(sizeof(*buf));
422 if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
423 return -EFAULT;
424
425 if (__put_user(b32.size, &buf->size)
426 || __put_user(b32.low_mark, &buf->low_mark)
427 || __put_user(b32.high_mark, &buf->high_mark))
428 return -EFAULT;
429
430 return drm_ioctl(file->f_path.dentry->d_inode, file,
431 DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
432 }
433
434 typedef struct drm_buf_info32 {
435 int count; /**< Entries in list */
436 u32 list;
437 } drm_buf_info32_t;
438
compat_drm_infobufs(struct file * file,unsigned int cmd,unsigned long arg)439 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
440 unsigned long arg)
441 {
442 drm_buf_info32_t req32;
443 drm_buf_info32_t __user *argp = (void __user *)arg;
444 drm_buf_desc32_t __user *to;
445 struct drm_buf_info __user *request;
446 struct drm_buf_desc __user *list;
447 size_t nbytes;
448 int i, err;
449 int count, actual;
450
451 if (copy_from_user(&req32, argp, sizeof(req32)))
452 return -EFAULT;
453
454 count = req32.count;
455 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
456 if (count < 0)
457 count = 0;
458 if (count > 0
459 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
460 return -EFAULT;
461
462 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
463 request = compat_alloc_user_space(nbytes);
464 if (!access_ok(VERIFY_WRITE, request, nbytes))
465 return -EFAULT;
466 list = (struct drm_buf_desc *) (request + 1);
467
468 if (__put_user(count, &request->count)
469 || __put_user(list, &request->list))
470 return -EFAULT;
471
472 err = drm_ioctl(file->f_path.dentry->d_inode, file,
473 DRM_IOCTL_INFO_BUFS, (unsigned long)request);
474 if (err)
475 return err;
476
477 if (__get_user(actual, &request->count))
478 return -EFAULT;
479 if (count >= actual)
480 for (i = 0; i < actual; ++i)
481 if (__copy_in_user(&to[i], &list[i],
482 offsetof(struct drm_buf_desc, flags)))
483 return -EFAULT;
484
485 if (__put_user(actual, &argp->count))
486 return -EFAULT;
487
488 return 0;
489 }
490
491 typedef struct drm_buf_pub32 {
492 int idx; /**< Index into the master buffer list */
493 int total; /**< Buffer size */
494 int used; /**< Amount of buffer in use (for DMA) */
495 u32 address; /**< Address of buffer */
496 } drm_buf_pub32_t;
497
498 typedef struct drm_buf_map32 {
499 int count; /**< Length of the buffer list */
500 u32 virtual; /**< Mmap'd area in user-virtual */
501 u32 list; /**< Buffer information */
502 } drm_buf_map32_t;
503
compat_drm_mapbufs(struct file * file,unsigned int cmd,unsigned long arg)504 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
505 unsigned long arg)
506 {
507 drm_buf_map32_t __user *argp = (void __user *)arg;
508 drm_buf_map32_t req32;
509 drm_buf_pub32_t __user *list32;
510 struct drm_buf_map __user *request;
511 struct drm_buf_pub __user *list;
512 int i, err;
513 int count, actual;
514 size_t nbytes;
515 void __user *addr;
516
517 if (copy_from_user(&req32, argp, sizeof(req32)))
518 return -EFAULT;
519 count = req32.count;
520 list32 = (void __user *)(unsigned long)req32.list;
521
522 if (count < 0)
523 return -EINVAL;
524 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
525 request = compat_alloc_user_space(nbytes);
526 if (!access_ok(VERIFY_WRITE, request, nbytes))
527 return -EFAULT;
528 list = (struct drm_buf_pub *) (request + 1);
529
530 if (__put_user(count, &request->count)
531 || __put_user(list, &request->list))
532 return -EFAULT;
533
534 err = drm_ioctl(file->f_path.dentry->d_inode, file,
535 DRM_IOCTL_MAP_BUFS, (unsigned long)request);
536 if (err)
537 return err;
538
539 if (__get_user(actual, &request->count))
540 return -EFAULT;
541 if (count >= actual)
542 for (i = 0; i < actual; ++i)
543 if (__copy_in_user(&list32[i], &list[i],
544 offsetof(struct drm_buf_pub, address))
545 || __get_user(addr, &list[i].address)
546 || __put_user((unsigned long)addr,
547 &list32[i].address))
548 return -EFAULT;
549
550 if (__put_user(actual, &argp->count)
551 || __get_user(addr, &request->virtual)
552 || __put_user((unsigned long)addr, &argp->virtual))
553 return -EFAULT;
554
555 return 0;
556 }
557
558 typedef struct drm_buf_free32 {
559 int count;
560 u32 list;
561 } drm_buf_free32_t;
562
compat_drm_freebufs(struct file * file,unsigned int cmd,unsigned long arg)563 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
564 unsigned long arg)
565 {
566 drm_buf_free32_t req32;
567 struct drm_buf_free __user *request;
568 drm_buf_free32_t __user *argp = (void __user *)arg;
569
570 if (copy_from_user(&req32, argp, sizeof(req32)))
571 return -EFAULT;
572
573 request = compat_alloc_user_space(sizeof(*request));
574 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
575 return -EFAULT;
576 if (__put_user(req32.count, &request->count)
577 || __put_user((int __user *)(unsigned long)req32.list,
578 &request->list))
579 return -EFAULT;
580
581 return drm_ioctl(file->f_path.dentry->d_inode, file,
582 DRM_IOCTL_FREE_BUFS, (unsigned long)request);
583 }
584
585 typedef struct drm_ctx_priv_map32 {
586 unsigned int ctx_id; /**< Context requesting private mapping */
587 u32 handle; /**< Handle of map */
588 } drm_ctx_priv_map32_t;
589
compat_drm_setsareactx(struct file * file,unsigned int cmd,unsigned long arg)590 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
591 unsigned long arg)
592 {
593 drm_ctx_priv_map32_t req32;
594 struct drm_ctx_priv_map __user *request;
595 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
596
597 if (copy_from_user(&req32, argp, sizeof(req32)))
598 return -EFAULT;
599
600 request = compat_alloc_user_space(sizeof(*request));
601 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
602 return -EFAULT;
603 if (__put_user(req32.ctx_id, &request->ctx_id)
604 || __put_user((void *)(unsigned long)req32.handle,
605 &request->handle))
606 return -EFAULT;
607
608 return drm_ioctl(file->f_path.dentry->d_inode, file,
609 DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
610 }
611
compat_drm_getsareactx(struct file * file,unsigned int cmd,unsigned long arg)612 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
613 unsigned long arg)
614 {
615 struct drm_ctx_priv_map __user *request;
616 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
617 int err;
618 unsigned int ctx_id;
619 void *handle;
620
621 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
622 || __get_user(ctx_id, &argp->ctx_id))
623 return -EFAULT;
624
625 request = compat_alloc_user_space(sizeof(*request));
626 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
627 return -EFAULT;
628 if (__put_user(ctx_id, &request->ctx_id))
629 return -EFAULT;
630
631 err = drm_ioctl(file->f_path.dentry->d_inode, file,
632 DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
633 if (err)
634 return err;
635
636 if (__get_user(handle, &request->handle)
637 || __put_user((unsigned long)handle, &argp->handle))
638 return -EFAULT;
639
640 return 0;
641 }
642
643 typedef struct drm_ctx_res32 {
644 int count;
645 u32 contexts;
646 } drm_ctx_res32_t;
647
compat_drm_resctx(struct file * file,unsigned int cmd,unsigned long arg)648 static int compat_drm_resctx(struct file *file, unsigned int cmd,
649 unsigned long arg)
650 {
651 drm_ctx_res32_t __user *argp = (void __user *)arg;
652 drm_ctx_res32_t res32;
653 struct drm_ctx_res __user *res;
654 int err;
655
656 if (copy_from_user(&res32, argp, sizeof(res32)))
657 return -EFAULT;
658
659 res = compat_alloc_user_space(sizeof(*res));
660 if (!access_ok(VERIFY_WRITE, res, sizeof(*res)))
661 return -EFAULT;
662 if (__put_user(res32.count, &res->count)
663 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
664 &res->contexts))
665 return -EFAULT;
666
667 err = drm_ioctl(file->f_path.dentry->d_inode, file,
668 DRM_IOCTL_RES_CTX, (unsigned long)res);
669 if (err)
670 return err;
671
672 if (__get_user(res32.count, &res->count)
673 || __put_user(res32.count, &argp->count))
674 return -EFAULT;
675
676 return 0;
677 }
678
679 typedef struct drm_dma32 {
680 int context; /**< Context handle */
681 int send_count; /**< Number of buffers to send */
682 u32 send_indices; /**< List of handles to buffers */
683 u32 send_sizes; /**< Lengths of data to send */
684 enum drm_dma_flags flags; /**< Flags */
685 int request_count; /**< Number of buffers requested */
686 int request_size; /**< Desired size for buffers */
687 u32 request_indices; /**< Buffer information */
688 u32 request_sizes;
689 int granted_count; /**< Number of buffers granted */
690 } drm_dma32_t;
691
compat_drm_dma(struct file * file,unsigned int cmd,unsigned long arg)692 static int compat_drm_dma(struct file *file, unsigned int cmd,
693 unsigned long arg)
694 {
695 drm_dma32_t d32;
696 drm_dma32_t __user *argp = (void __user *)arg;
697 struct drm_dma __user *d;
698 int err;
699
700 if (copy_from_user(&d32, argp, sizeof(d32)))
701 return -EFAULT;
702
703 d = compat_alloc_user_space(sizeof(*d));
704 if (!access_ok(VERIFY_WRITE, d, sizeof(*d)))
705 return -EFAULT;
706
707 if (__put_user(d32.context, &d->context)
708 || __put_user(d32.send_count, &d->send_count)
709 || __put_user((int __user *)(unsigned long)d32.send_indices,
710 &d->send_indices)
711 || __put_user((int __user *)(unsigned long)d32.send_sizes,
712 &d->send_sizes)
713 || __put_user(d32.flags, &d->flags)
714 || __put_user(d32.request_count, &d->request_count)
715 || __put_user((int __user *)(unsigned long)d32.request_indices,
716 &d->request_indices)
717 || __put_user((int __user *)(unsigned long)d32.request_sizes,
718 &d->request_sizes))
719 return -EFAULT;
720
721 err = drm_ioctl(file->f_path.dentry->d_inode, file,
722 DRM_IOCTL_DMA, (unsigned long)d);
723 if (err)
724 return err;
725
726 if (__get_user(d32.request_size, &d->request_size)
727 || __get_user(d32.granted_count, &d->granted_count)
728 || __put_user(d32.request_size, &argp->request_size)
729 || __put_user(d32.granted_count, &argp->granted_count))
730 return -EFAULT;
731
732 return 0;
733 }
734
735 #if __OS_HAS_AGP
736 typedef struct drm_agp_mode32 {
737 u32 mode; /**< AGP mode */
738 } drm_agp_mode32_t;
739
compat_drm_agp_enable(struct file * file,unsigned int cmd,unsigned long arg)740 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
741 unsigned long arg)
742 {
743 drm_agp_mode32_t __user *argp = (void __user *)arg;
744 drm_agp_mode32_t m32;
745 struct drm_agp_mode __user *mode;
746
747 if (get_user(m32.mode, &argp->mode))
748 return -EFAULT;
749
750 mode = compat_alloc_user_space(sizeof(*mode));
751 if (put_user(m32.mode, &mode->mode))
752 return -EFAULT;
753
754 return drm_ioctl(file->f_path.dentry->d_inode, file,
755 DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
756 }
757
758 typedef struct drm_agp_info32 {
759 int agp_version_major;
760 int agp_version_minor;
761 u32 mode;
762 u32 aperture_base; /* physical address */
763 u32 aperture_size; /* bytes */
764 u32 memory_allowed; /* bytes */
765 u32 memory_used;
766
767 /* PCI information */
768 unsigned short id_vendor;
769 unsigned short id_device;
770 } drm_agp_info32_t;
771
compat_drm_agp_info(struct file * file,unsigned int cmd,unsigned long arg)772 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
773 unsigned long arg)
774 {
775 drm_agp_info32_t __user *argp = (void __user *)arg;
776 drm_agp_info32_t i32;
777 struct drm_agp_info __user *info;
778 int err;
779
780 info = compat_alloc_user_space(sizeof(*info));
781 if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
782 return -EFAULT;
783
784 err = drm_ioctl(file->f_path.dentry->d_inode, file,
785 DRM_IOCTL_AGP_INFO, (unsigned long)info);
786 if (err)
787 return err;
788
789 if (__get_user(i32.agp_version_major, &info->agp_version_major)
790 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
791 || __get_user(i32.mode, &info->mode)
792 || __get_user(i32.aperture_base, &info->aperture_base)
793 || __get_user(i32.aperture_size, &info->aperture_size)
794 || __get_user(i32.memory_allowed, &info->memory_allowed)
795 || __get_user(i32.memory_used, &info->memory_used)
796 || __get_user(i32.id_vendor, &info->id_vendor)
797 || __get_user(i32.id_device, &info->id_device))
798 return -EFAULT;
799
800 if (copy_to_user(argp, &i32, sizeof(i32)))
801 return -EFAULT;
802
803 return 0;
804 }
805
806 typedef struct drm_agp_buffer32 {
807 u32 size; /**< In bytes -- will round to page boundary */
808 u32 handle; /**< Used for binding / unbinding */
809 u32 type; /**< Type of memory to allocate */
810 u32 physical; /**< Physical used by i810 */
811 } drm_agp_buffer32_t;
812
compat_drm_agp_alloc(struct file * file,unsigned int cmd,unsigned long arg)813 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
814 unsigned long arg)
815 {
816 drm_agp_buffer32_t __user *argp = (void __user *)arg;
817 drm_agp_buffer32_t req32;
818 struct drm_agp_buffer __user *request;
819 int err;
820
821 if (copy_from_user(&req32, argp, sizeof(req32)))
822 return -EFAULT;
823
824 request = compat_alloc_user_space(sizeof(*request));
825 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
826 || __put_user(req32.size, &request->size)
827 || __put_user(req32.type, &request->type))
828 return -EFAULT;
829
830 err = drm_ioctl(file->f_path.dentry->d_inode, file,
831 DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
832 if (err)
833 return err;
834
835 if (__get_user(req32.handle, &request->handle)
836 || __get_user(req32.physical, &request->physical)
837 || copy_to_user(argp, &req32, sizeof(req32))) {
838 drm_ioctl(file->f_path.dentry->d_inode, file,
839 DRM_IOCTL_AGP_FREE, (unsigned long)request);
840 return -EFAULT;
841 }
842
843 return 0;
844 }
845
compat_drm_agp_free(struct file * file,unsigned int cmd,unsigned long arg)846 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
847 unsigned long arg)
848 {
849 drm_agp_buffer32_t __user *argp = (void __user *)arg;
850 struct drm_agp_buffer __user *request;
851 u32 handle;
852
853 request = compat_alloc_user_space(sizeof(*request));
854 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
855 || get_user(handle, &argp->handle)
856 || __put_user(handle, &request->handle))
857 return -EFAULT;
858
859 return drm_ioctl(file->f_path.dentry->d_inode, file,
860 DRM_IOCTL_AGP_FREE, (unsigned long)request);
861 }
862
863 typedef struct drm_agp_binding32 {
864 u32 handle; /**< From drm_agp_buffer */
865 u32 offset; /**< In bytes -- will round to page boundary */
866 } drm_agp_binding32_t;
867
compat_drm_agp_bind(struct file * file,unsigned int cmd,unsigned long arg)868 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
869 unsigned long arg)
870 {
871 drm_agp_binding32_t __user *argp = (void __user *)arg;
872 drm_agp_binding32_t req32;
873 struct drm_agp_binding __user *request;
874
875 if (copy_from_user(&req32, argp, sizeof(req32)))
876 return -EFAULT;
877
878 request = compat_alloc_user_space(sizeof(*request));
879 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
880 || __put_user(req32.handle, &request->handle)
881 || __put_user(req32.offset, &request->offset))
882 return -EFAULT;
883
884 return drm_ioctl(file->f_path.dentry->d_inode, file,
885 DRM_IOCTL_AGP_BIND, (unsigned long)request);
886 }
887
compat_drm_agp_unbind(struct file * file,unsigned int cmd,unsigned long arg)888 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
889 unsigned long arg)
890 {
891 drm_agp_binding32_t __user *argp = (void __user *)arg;
892 struct drm_agp_binding __user *request;
893 u32 handle;
894
895 request = compat_alloc_user_space(sizeof(*request));
896 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
897 || get_user(handle, &argp->handle)
898 || __put_user(handle, &request->handle))
899 return -EFAULT;
900
901 return drm_ioctl(file->f_path.dentry->d_inode, file,
902 DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
903 }
904 #endif /* __OS_HAS_AGP */
905
906 typedef struct drm_scatter_gather32 {
907 u32 size; /**< In bytes -- will round to page boundary */
908 u32 handle; /**< Used for mapping / unmapping */
909 } drm_scatter_gather32_t;
910
compat_drm_sg_alloc(struct file * file,unsigned int cmd,unsigned long arg)911 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
912 unsigned long arg)
913 {
914 drm_scatter_gather32_t __user *argp = (void __user *)arg;
915 struct drm_scatter_gather __user *request;
916 int err;
917 unsigned long x;
918
919 request = compat_alloc_user_space(sizeof(*request));
920 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
921 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
922 || __get_user(x, &argp->size)
923 || __put_user(x, &request->size))
924 return -EFAULT;
925
926 err = drm_ioctl(file->f_path.dentry->d_inode, file,
927 DRM_IOCTL_SG_ALLOC, (unsigned long)request);
928 if (err)
929 return err;
930
931 /* XXX not sure about the handle conversion here... */
932 if (__get_user(x, &request->handle)
933 || __put_user(x >> PAGE_SHIFT, &argp->handle))
934 return -EFAULT;
935
936 return 0;
937 }
938
compat_drm_sg_free(struct file * file,unsigned int cmd,unsigned long arg)939 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
940 unsigned long arg)
941 {
942 drm_scatter_gather32_t __user *argp = (void __user *)arg;
943 struct drm_scatter_gather __user *request;
944 unsigned long x;
945
946 request = compat_alloc_user_space(sizeof(*request));
947 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
948 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
949 || __get_user(x, &argp->handle)
950 || __put_user(x << PAGE_SHIFT, &request->handle))
951 return -EFAULT;
952
953 return drm_ioctl(file->f_path.dentry->d_inode, file,
954 DRM_IOCTL_SG_FREE, (unsigned long)request);
955 }
956
957 typedef struct drm_update_draw32 {
958 drm_drawable_t handle;
959 unsigned int type;
960 unsigned int num;
961 /* 64-bit version has a 32-bit pad here */
962 u64 data; /**< Pointer */
963 } __attribute__((packed)) drm_update_draw32_t;
964
compat_drm_update_draw(struct file * file,unsigned int cmd,unsigned long arg)965 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
966 unsigned long arg)
967 {
968 drm_update_draw32_t update32;
969 struct drm_update_draw __user *request;
970 int err;
971
972 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
973 return -EFAULT;
974
975 request = compat_alloc_user_space(sizeof(*request));
976 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) ||
977 __put_user(update32.handle, &request->handle) ||
978 __put_user(update32.type, &request->type) ||
979 __put_user(update32.num, &request->num) ||
980 __put_user(update32.data, &request->data))
981 return -EFAULT;
982
983 err = drm_ioctl(file->f_path.dentry->d_inode, file,
984 DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
985 return err;
986 }
987
988 struct drm_wait_vblank_request32 {
989 enum drm_vblank_seq_type type;
990 unsigned int sequence;
991 u32 signal;
992 };
993
994 struct drm_wait_vblank_reply32 {
995 enum drm_vblank_seq_type type;
996 unsigned int sequence;
997 s32 tval_sec;
998 s32 tval_usec;
999 };
1000
1001 typedef union drm_wait_vblank32 {
1002 struct drm_wait_vblank_request32 request;
1003 struct drm_wait_vblank_reply32 reply;
1004 } drm_wait_vblank32_t;
1005
compat_drm_wait_vblank(struct file * file,unsigned int cmd,unsigned long arg)1006 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
1007 unsigned long arg)
1008 {
1009 drm_wait_vblank32_t __user *argp = (void __user *)arg;
1010 drm_wait_vblank32_t req32;
1011 union drm_wait_vblank __user *request;
1012 int err;
1013
1014 if (copy_from_user(&req32, argp, sizeof(req32)))
1015 return -EFAULT;
1016
1017 request = compat_alloc_user_space(sizeof(*request));
1018 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
1019 || __put_user(req32.request.type, &request->request.type)
1020 || __put_user(req32.request.sequence, &request->request.sequence)
1021 || __put_user(req32.request.signal, &request->request.signal))
1022 return -EFAULT;
1023
1024 err = drm_ioctl(file->f_path.dentry->d_inode, file,
1025 DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1026 if (err)
1027 return err;
1028
1029 if (__get_user(req32.reply.type, &request->reply.type)
1030 || __get_user(req32.reply.sequence, &request->reply.sequence)
1031 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1032 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1033 return -EFAULT;
1034
1035 if (copy_to_user(argp, &req32, sizeof(req32)))
1036 return -EFAULT;
1037
1038 return 0;
1039 }
1040
1041 drm_ioctl_compat_t *drm_compat_ioctls[] = {
1042 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1043 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1044 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1045 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1046 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1047 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1048 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1049 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1050 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1051 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1052 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1053 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1054 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1055 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1056 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1057 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1058 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1059 #if __OS_HAS_AGP
1060 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1061 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1062 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1063 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1064 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1065 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1066 #endif
1067 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1068 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1069 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1070 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1071 };
1072
1073 /**
1074 * Called whenever a 32-bit process running under a 64-bit kernel
1075 * performs an ioctl on /dev/drm.
1076 *
1077 * \param file_priv DRM file private.
1078 * \param cmd command.
1079 * \param arg user argument.
1080 * \return zero on success or negative number on failure.
1081 */
drm_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)1082 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1083 {
1084 unsigned int nr = DRM_IOCTL_NR(cmd);
1085 drm_ioctl_compat_t *fn;
1086 int ret;
1087
1088 /* Assume that ioctls without an explicit compat routine will just
1089 * work. This may not always be a good assumption, but it's better
1090 * than always failing.
1091 */
1092 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1093 return drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
1094
1095 fn = drm_compat_ioctls[nr];
1096
1097 lock_kernel(); /* XXX for now */
1098 if (fn != NULL)
1099 ret = (*fn) (filp, cmd, arg);
1100 else
1101 ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
1102 unlock_kernel();
1103
1104 return ret;
1105 }
1106
1107 EXPORT_SYMBOL(drm_compat_ioctl);
1108