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proc: Fix proc_sys_prune_dcache to hold a sb reference
[cris-mirror.git] / drivers / gpu / drm / drm_ioc32.c
blobae386783e3eab859e6de7ee8621c7ab8ab48800c
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 #include <linux/ratelimit.h>
32 #include <linux/export.h>
33
34 #include <drm/drmP.h>
35
36 #define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
37 #define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
38 #define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
39 #define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
40 #define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
41
42 #define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
43 #define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
44 #define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
45 #define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
46 #define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
47 #define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
48 #define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
49
50 #define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
51
52 #define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
53 #define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
54
55 #define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
56 #define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
57
58 #define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
59 #define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
60 #define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
61 #define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
62 #define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
63 #define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
64
65 #define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
66 #define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
67
68 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
69
70 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
71
72 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
73
74 typedef struct drm_version_32 {
75 int version_major; /* Major version */
76 int version_minor; /* Minor version */
77 int version_patchlevel; /* Patch level */
78 u32 name_len; /* Length of name buffer */
79 u32 name; /* Name of driver */
80 u32 date_len; /* Length of date buffer */
81 u32 date; /* User-space buffer to hold date */
82 u32 desc_len; /* Length of desc buffer */
83 u32 desc; /* User-space buffer to hold desc */
84 } drm_version32_t;
85
86 static int compat_drm_version(struct file *file, unsigned int cmd,
87 unsigned long arg)
88 {
89 drm_version32_t v32;
90 struct drm_version __user *version;
91 int err;
92
93 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
94 return -EFAULT;
95
96 version = compat_alloc_user_space(sizeof(*version));
97 if (!version)
98 return -EFAULT;
99 if (__put_user(v32.name_len, &version->name_len)
100 || __put_user((void __user *)(unsigned long)v32.name,
101 &version->name)
102 || __put_user(v32.date_len, &version->date_len)
103 || __put_user((void __user *)(unsigned long)v32.date,
104 &version->date)
105 || __put_user(v32.desc_len, &version->desc_len)
106 || __put_user((void __user *)(unsigned long)v32.desc,
107 &version->desc))
108 return -EFAULT;
109
110 err = drm_ioctl(file,
111 DRM_IOCTL_VERSION, (unsigned long)version);
112 if (err)
113 return err;
114
115 if (__get_user(v32.version_major, &version->version_major)
116 || __get_user(v32.version_minor, &version->version_minor)
117 || __get_user(v32.version_patchlevel, &version->version_patchlevel)
118 || __get_user(v32.name_len, &version->name_len)
119 || __get_user(v32.date_len, &version->date_len)
120 || __get_user(v32.desc_len, &version->desc_len))
121 return -EFAULT;
122
123 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
124 return -EFAULT;
125 return 0;
126 }
127
128 typedef struct drm_unique32 {
129 u32 unique_len; /* Length of unique */
130 u32 unique; /* Unique name for driver instantiation */
131 } drm_unique32_t;
132
133 static int compat_drm_getunique(struct file *file, unsigned int cmd,
134 unsigned long arg)
135 {
136 drm_unique32_t uq32;
137 struct drm_unique __user *u;
138 int err;
139
140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
141 return -EFAULT;
142
143 u = compat_alloc_user_space(sizeof(*u));
144 if (!u)
145 return -EFAULT;
146 if (__put_user(uq32.unique_len, &u->unique_len)
147 || __put_user((void __user *)(unsigned long)uq32.unique,
148 &u->unique))
149 return -EFAULT;
150
151 err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
152 if (err)
153 return err;
154
155 if (__get_user(uq32.unique_len, &u->unique_len))
156 return -EFAULT;
157 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
158 return -EFAULT;
159 return 0;
160 }
161
162 static int compat_drm_setunique(struct file *file, unsigned int cmd,
163 unsigned long arg)
164 {
165 drm_unique32_t uq32;
166 struct drm_unique __user *u;
167
168 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
169 return -EFAULT;
170
171 u = compat_alloc_user_space(sizeof(*u));
172 if (!u)
173 return -EFAULT;
174 if (__put_user(uq32.unique_len, &u->unique_len)
175 || __put_user((void __user *)(unsigned long)uq32.unique,
176 &u->unique))
177 return -EFAULT;
178
179 return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
180 }
181
182 typedef struct drm_map32 {
183 u32 offset; /* Requested physical address (0 for SAREA) */
184 u32 size; /* Requested physical size (bytes) */
185 enum drm_map_type type; /* Type of memory to map */
186 enum drm_map_flags flags; /* Flags */
187 u32 handle; /* User-space: "Handle" to pass to mmap() */
188 int mtrr; /* MTRR slot used */
189 } drm_map32_t;
190
191 static int compat_drm_getmap(struct file *file, unsigned int cmd,
192 unsigned long arg)
193 {
194 drm_map32_t __user *argp = (void __user *)arg;
195 drm_map32_t m32;
196 struct drm_map __user *map;
197 int idx, err;
198 void *handle;
199
200 if (get_user(idx, &argp->offset))
201 return -EFAULT;
202
203 map = compat_alloc_user_space(sizeof(*map));
204 if (!map)
205 return -EFAULT;
206 if (__put_user(idx, &map->offset))
207 return -EFAULT;
208
209 err = drm_ioctl(file, 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
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 (!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, DRM_IOCTL_ADD_MAP, (unsigned long)map);
250 if (err)
251 return err;
252
253 if (__get_user(m32.offset, &map->offset)
254 || __get_user(m32.mtrr, &map->mtrr)
255 || __get_user(handle, &map->handle))
256 return -EFAULT;
257
258 m32.handle = (unsigned long)handle;
259 if (m32.handle != (unsigned long)handle)
260 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
261 handle, m32.type, m32.offset);
262
263 if (copy_to_user(argp, &m32, sizeof(m32)))
264 return -EFAULT;
265
266 return 0;
267 }
268
269 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
270 unsigned long arg)
271 {
272 drm_map32_t __user *argp = (void __user *)arg;
273 struct drm_map __user *map;
274 u32 handle;
275
276 if (get_user(handle, &argp->handle))
277 return -EFAULT;
278
279 map = compat_alloc_user_space(sizeof(*map));
280 if (!map)
281 return -EFAULT;
282 if (__put_user((void *)(unsigned long)handle, &map->handle))
283 return -EFAULT;
284
285 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
286 }
287
288 typedef struct drm_client32 {
289 int idx; /* Which client desired? */
290 int auth; /* Is client authenticated? */
291 u32 pid; /* Process ID */
292 u32 uid; /* User ID */
293 u32 magic; /* Magic */
294 u32 iocs; /* Ioctl count */
295 } drm_client32_t;
296
297 static int compat_drm_getclient(struct file *file, unsigned int cmd,
298 unsigned long arg)
299 {
300 drm_client32_t c32;
301 drm_client32_t __user *argp = (void __user *)arg;
302 struct drm_client __user *client;
303 int idx, err;
304
305 if (get_user(idx, &argp->idx))
306 return -EFAULT;
307
308 client = compat_alloc_user_space(sizeof(*client));
309 if (!client)
310 return -EFAULT;
311 if (__put_user(idx, &client->idx))
312 return -EFAULT;
313
314 err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
315 if (err)
316 return err;
317
318 if (__get_user(c32.idx, &client->idx)
319 || __get_user(c32.auth, &client->auth)
320 || __get_user(c32.pid, &client->pid)
321 || __get_user(c32.uid, &client->uid)
322 || __get_user(c32.magic, &client->magic)
323 || __get_user(c32.iocs, &client->iocs))
324 return -EFAULT;
325
326 if (copy_to_user(argp, &c32, sizeof(c32)))
327 return -EFAULT;
328 return 0;
329 }
330
331 typedef struct drm_stats32 {
332 u32 count;
333 struct {
334 u32 value;
335 enum drm_stat_type type;
336 } data[15];
337 } drm_stats32_t;
338
339 static int compat_drm_getstats(struct file *file, unsigned int cmd,
340 unsigned long arg)
341 {
342 drm_stats32_t s32;
343 drm_stats32_t __user *argp = (void __user *)arg;
344 struct drm_stats __user *stats;
345 int i, err;
346
347 memset(&s32, 0, sizeof(drm_stats32_t));
348 stats = compat_alloc_user_space(sizeof(*stats));
349 if (!stats)
350 return -EFAULT;
351
352 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
353 if (err)
354 return err;
355
356 if (__get_user(s32.count, &stats->count))
357 return -EFAULT;
358 for (i = 0; i < 15; ++i)
359 if (__get_user(s32.data[i].value, &stats->data[i].value)
360 || __get_user(s32.data[i].type, &stats->data[i].type))
361 return -EFAULT;
362
363 if (copy_to_user(argp, &s32, sizeof(s32)))
364 return -EFAULT;
365 return 0;
366 }
367
368 typedef struct drm_buf_desc32 {
369 int count; /* Number of buffers of this size */
370 int size; /* Size in bytes */
371 int low_mark; /* Low water mark */
372 int high_mark; /* High water mark */
373 int flags;
374 u32 agp_start; /* Start address in the AGP aperture */
375 } drm_buf_desc32_t;
376
377 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
378 unsigned long arg)
379 {
380 drm_buf_desc32_t __user *argp = (void __user *)arg;
381 struct drm_buf_desc __user *buf;
382 int err;
383 unsigned long agp_start;
384
385 buf = compat_alloc_user_space(sizeof(*buf));
386 if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
387 return -EFAULT;
388
389 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
390 || __get_user(agp_start, &argp->agp_start)
391 || __put_user(agp_start, &buf->agp_start))
392 return -EFAULT;
393
394 err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
395 if (err)
396 return err;
397
398 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
399 || __get_user(agp_start, &buf->agp_start)
400 || __put_user(agp_start, &argp->agp_start))
401 return -EFAULT;
402
403 return 0;
404 }
405
406 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
407 unsigned long arg)
408 {
409 drm_buf_desc32_t b32;
410 drm_buf_desc32_t __user *argp = (void __user *)arg;
411 struct drm_buf_desc __user *buf;
412
413 if (copy_from_user(&b32, argp, sizeof(b32)))
414 return -EFAULT;
415
416 buf = compat_alloc_user_space(sizeof(*buf));
417 if (!buf)
418 return -EFAULT;
419
420 if (__put_user(b32.size, &buf->size)
421 || __put_user(b32.low_mark, &buf->low_mark)
422 || __put_user(b32.high_mark, &buf->high_mark))
423 return -EFAULT;
424
425 return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
426 }
427
428 typedef struct drm_buf_info32 {
429 int count; /**< Entries in list */
430 u32 list;
431 } drm_buf_info32_t;
432
433 static int compat_drm_infobufs(struct file *file, unsigned int cmd,
434 unsigned long arg)
435 {
436 drm_buf_info32_t req32;
437 drm_buf_info32_t __user *argp = (void __user *)arg;
438 drm_buf_desc32_t __user *to;
439 struct drm_buf_info __user *request;
440 struct drm_buf_desc __user *list;
441 size_t nbytes;
442 int i, err;
443 int count, actual;
444
445 if (copy_from_user(&req32, argp, sizeof(req32)))
446 return -EFAULT;
447
448 count = req32.count;
449 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
450 if (count < 0)
451 count = 0;
452 if (count > 0
453 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
454 return -EFAULT;
455
456 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
457 request = compat_alloc_user_space(nbytes);
458 if (!request)
459 return -EFAULT;
460 list = (struct drm_buf_desc *) (request + 1);
461
462 if (__put_user(count, &request->count)
463 || __put_user(list, &request->list))
464 return -EFAULT;
465
466 err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
467 if (err)
468 return err;
469
470 if (__get_user(actual, &request->count))
471 return -EFAULT;
472 if (count >= actual)
473 for (i = 0; i < actual; ++i)
474 if (__copy_in_user(&to[i], &list[i],
475 offsetof(struct drm_buf_desc, flags)))
476 return -EFAULT;
477
478 if (__put_user(actual, &argp->count))
479 return -EFAULT;
480
481 return 0;
482 }
483
484 typedef struct drm_buf_pub32 {
485 int idx; /**< Index into the master buffer list */
486 int total; /**< Buffer size */
487 int used; /**< Amount of buffer in use (for DMA) */
488 u32 address; /**< Address of buffer */
489 } drm_buf_pub32_t;
490
491 typedef struct drm_buf_map32 {
492 int count; /**< Length of the buffer list */
493 u32 virtual; /**< Mmap'd area in user-virtual */
494 u32 list; /**< Buffer information */
495 } drm_buf_map32_t;
496
497 static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
498 unsigned long arg)
499 {
500 drm_buf_map32_t __user *argp = (void __user *)arg;
501 drm_buf_map32_t req32;
502 drm_buf_pub32_t __user *list32;
503 struct drm_buf_map __user *request;
504 struct drm_buf_pub __user *list;
505 int i, err;
506 int count, actual;
507 size_t nbytes;
508 void __user *addr;
509
510 if (copy_from_user(&req32, argp, sizeof(req32)))
511 return -EFAULT;
512 count = req32.count;
513 list32 = (void __user *)(unsigned long)req32.list;
514
515 if (count < 0)
516 return -EINVAL;
517 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
518 request = compat_alloc_user_space(nbytes);
519 if (!request)
520 return -EFAULT;
521 list = (struct drm_buf_pub *) (request + 1);
522
523 if (__put_user(count, &request->count)
524 || __put_user(list, &request->list))
525 return -EFAULT;
526
527 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
528 if (err)
529 return err;
530
531 if (__get_user(actual, &request->count))
532 return -EFAULT;
533 if (count >= actual)
534 for (i = 0; i < actual; ++i)
535 if (__copy_in_user(&list32[i], &list[i],
536 offsetof(struct drm_buf_pub, address))
537 || __get_user(addr, &list[i].address)
538 || __put_user((unsigned long)addr,
539 &list32[i].address))
540 return -EFAULT;
541
542 if (__put_user(actual, &argp->count)
543 || __get_user(addr, &request->virtual)
544 || __put_user((unsigned long)addr, &argp->virtual))
545 return -EFAULT;
546
547 return 0;
548 }
549
550 typedef struct drm_buf_free32 {
551 int count;
552 u32 list;
553 } drm_buf_free32_t;
554
555 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
556 unsigned long arg)
557 {
558 drm_buf_free32_t req32;
559 struct drm_buf_free __user *request;
560 drm_buf_free32_t __user *argp = (void __user *)arg;
561
562 if (copy_from_user(&req32, argp, sizeof(req32)))
563 return -EFAULT;
564
565 request = compat_alloc_user_space(sizeof(*request));
566 if (!request)
567 return -EFAULT;
568 if (__put_user(req32.count, &request->count)
569 || __put_user((int __user *)(unsigned long)req32.list,
570 &request->list))
571 return -EFAULT;
572
573 return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
574 }
575
576 typedef struct drm_ctx_priv_map32 {
577 unsigned int ctx_id; /**< Context requesting private mapping */
578 u32 handle; /**< Handle of map */
579 } drm_ctx_priv_map32_t;
580
581 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
582 unsigned long arg)
583 {
584 drm_ctx_priv_map32_t req32;
585 struct drm_ctx_priv_map __user *request;
586 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
587
588 if (copy_from_user(&req32, argp, sizeof(req32)))
589 return -EFAULT;
590
591 request = compat_alloc_user_space(sizeof(*request));
592 if (!request)
593 return -EFAULT;
594 if (__put_user(req32.ctx_id, &request->ctx_id)
595 || __put_user((void *)(unsigned long)req32.handle,
596 &request->handle))
597 return -EFAULT;
598
599 return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
600 }
601
602 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
603 unsigned long arg)
604 {
605 struct drm_ctx_priv_map __user *request;
606 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
607 int err;
608 unsigned int ctx_id;
609 void *handle;
610
611 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
612 || __get_user(ctx_id, &argp->ctx_id))
613 return -EFAULT;
614
615 request = compat_alloc_user_space(sizeof(*request));
616 if (!request)
617 return -EFAULT;
618 if (__put_user(ctx_id, &request->ctx_id))
619 return -EFAULT;
620
621 err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
622 if (err)
623 return err;
624
625 if (__get_user(handle, &request->handle)
626 || __put_user((unsigned long)handle, &argp->handle))
627 return -EFAULT;
628
629 return 0;
630 }
631
632 typedef struct drm_ctx_res32 {
633 int count;
634 u32 contexts;
635 } drm_ctx_res32_t;
636
637 static int compat_drm_resctx(struct file *file, unsigned int cmd,
638 unsigned long arg)
639 {
640 drm_ctx_res32_t __user *argp = (void __user *)arg;
641 drm_ctx_res32_t res32;
642 struct drm_ctx_res __user *res;
643 int err;
644
645 if (copy_from_user(&res32, argp, sizeof(res32)))
646 return -EFAULT;
647
648 res = compat_alloc_user_space(sizeof(*res));
649 if (!res)
650 return -EFAULT;
651 if (__put_user(res32.count, &res->count)
652 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
653 &res->contexts))
654 return -EFAULT;
655
656 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
657 if (err)
658 return err;
659
660 if (__get_user(res32.count, &res->count)
661 || __put_user(res32.count, &argp->count))
662 return -EFAULT;
663
664 return 0;
665 }
666
667 typedef struct drm_dma32 {
668 int context; /**< Context handle */
669 int send_count; /**< Number of buffers to send */
670 u32 send_indices; /**< List of handles to buffers */
671 u32 send_sizes; /**< Lengths of data to send */
672 enum drm_dma_flags flags; /**< Flags */
673 int request_count; /**< Number of buffers requested */
674 int request_size; /**< Desired size for buffers */
675 u32 request_indices; /**< Buffer information */
676 u32 request_sizes;
677 int granted_count; /**< Number of buffers granted */
678 } drm_dma32_t;
679
680 static int compat_drm_dma(struct file *file, unsigned int cmd,
681 unsigned long arg)
682 {
683 drm_dma32_t d32;
684 drm_dma32_t __user *argp = (void __user *)arg;
685 struct drm_dma __user *d;
686 int err;
687
688 if (copy_from_user(&d32, argp, sizeof(d32)))
689 return -EFAULT;
690
691 d = compat_alloc_user_space(sizeof(*d));
692 if (!d)
693 return -EFAULT;
694
695 if (__put_user(d32.context, &d->context)
696 || __put_user(d32.send_count, &d->send_count)
697 || __put_user((int __user *)(unsigned long)d32.send_indices,
698 &d->send_indices)
699 || __put_user((int __user *)(unsigned long)d32.send_sizes,
700 &d->send_sizes)
701 || __put_user(d32.flags, &d->flags)
702 || __put_user(d32.request_count, &d->request_count)
703 || __put_user((int __user *)(unsigned long)d32.request_indices,
704 &d->request_indices)
705 || __put_user((int __user *)(unsigned long)d32.request_sizes,
706 &d->request_sizes))
707 return -EFAULT;
708
709 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
710 if (err)
711 return err;
712
713 if (__get_user(d32.request_size, &d->request_size)
714 || __get_user(d32.granted_count, &d->granted_count)
715 || __put_user(d32.request_size, &argp->request_size)
716 || __put_user(d32.granted_count, &argp->granted_count))
717 return -EFAULT;
718
719 return 0;
720 }
721
722 #if IS_ENABLED(CONFIG_AGP)
723 typedef struct drm_agp_mode32 {
724 u32 mode; /**< AGP mode */
725 } drm_agp_mode32_t;
726
727 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
728 unsigned long arg)
729 {
730 drm_agp_mode32_t __user *argp = (void __user *)arg;
731 drm_agp_mode32_t m32;
732 struct drm_agp_mode __user *mode;
733
734 if (get_user(m32.mode, &argp->mode))
735 return -EFAULT;
736
737 mode = compat_alloc_user_space(sizeof(*mode));
738 if (put_user(m32.mode, &mode->mode))
739 return -EFAULT;
740
741 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
742 }
743
744 typedef struct drm_agp_info32 {
745 int agp_version_major;
746 int agp_version_minor;
747 u32 mode;
748 u32 aperture_base; /* physical address */
749 u32 aperture_size; /* bytes */
750 u32 memory_allowed; /* bytes */
751 u32 memory_used;
752
753 /* PCI information */
754 unsigned short id_vendor;
755 unsigned short id_device;
756 } drm_agp_info32_t;
757
758 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
759 unsigned long arg)
760 {
761 drm_agp_info32_t __user *argp = (void __user *)arg;
762 drm_agp_info32_t i32;
763 struct drm_agp_info __user *info;
764 int err;
765
766 info = compat_alloc_user_space(sizeof(*info));
767 if (!info)
768 return -EFAULT;
769
770 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
771 if (err)
772 return err;
773
774 if (__get_user(i32.agp_version_major, &info->agp_version_major)
775 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
776 || __get_user(i32.mode, &info->mode)
777 || __get_user(i32.aperture_base, &info->aperture_base)
778 || __get_user(i32.aperture_size, &info->aperture_size)
779 || __get_user(i32.memory_allowed, &info->memory_allowed)
780 || __get_user(i32.memory_used, &info->memory_used)
781 || __get_user(i32.id_vendor, &info->id_vendor)
782 || __get_user(i32.id_device, &info->id_device))
783 return -EFAULT;
784
785 if (copy_to_user(argp, &i32, sizeof(i32)))
786 return -EFAULT;
787
788 return 0;
789 }
790
791 typedef struct drm_agp_buffer32 {
792 u32 size; /**< In bytes -- will round to page boundary */
793 u32 handle; /**< Used for binding / unbinding */
794 u32 type; /**< Type of memory to allocate */
795 u32 physical; /**< Physical used by i810 */
796 } drm_agp_buffer32_t;
797
798 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
799 unsigned long arg)
800 {
801 drm_agp_buffer32_t __user *argp = (void __user *)arg;
802 drm_agp_buffer32_t req32;
803 struct drm_agp_buffer __user *request;
804 int err;
805
806 if (copy_from_user(&req32, argp, sizeof(req32)))
807 return -EFAULT;
808
809 request = compat_alloc_user_space(sizeof(*request));
810 if (!request
811 || __put_user(req32.size, &request->size)
812 || __put_user(req32.type, &request->type))
813 return -EFAULT;
814
815 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
816 if (err)
817 return err;
818
819 if (__get_user(req32.handle, &request->handle)
820 || __get_user(req32.physical, &request->physical)
821 || copy_to_user(argp, &req32, sizeof(req32))) {
822 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
823 return -EFAULT;
824 }
825
826 return 0;
827 }
828
829 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
830 unsigned long arg)
831 {
832 drm_agp_buffer32_t __user *argp = (void __user *)arg;
833 struct drm_agp_buffer __user *request;
834 u32 handle;
835
836 request = compat_alloc_user_space(sizeof(*request));
837 if (!request
838 || get_user(handle, &argp->handle)
839 || __put_user(handle, &request->handle))
840 return -EFAULT;
841
842 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
843 }
844
845 typedef struct drm_agp_binding32 {
846 u32 handle; /**< From drm_agp_buffer */
847 u32 offset; /**< In bytes -- will round to page boundary */
848 } drm_agp_binding32_t;
849
850 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
851 unsigned long arg)
852 {
853 drm_agp_binding32_t __user *argp = (void __user *)arg;
854 drm_agp_binding32_t req32;
855 struct drm_agp_binding __user *request;
856
857 if (copy_from_user(&req32, argp, sizeof(req32)))
858 return -EFAULT;
859
860 request = compat_alloc_user_space(sizeof(*request));
861 if (!request
862 || __put_user(req32.handle, &request->handle)
863 || __put_user(req32.offset, &request->offset))
864 return -EFAULT;
865
866 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
867 }
868
869 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
870 unsigned long arg)
871 {
872 drm_agp_binding32_t __user *argp = (void __user *)arg;
873 struct drm_agp_binding __user *request;
874 u32 handle;
875
876 request = compat_alloc_user_space(sizeof(*request));
877 if (!request
878 || get_user(handle, &argp->handle)
879 || __put_user(handle, &request->handle))
880 return -EFAULT;
881
882 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
883 }
884 #endif /* CONFIG_AGP */
885
886 typedef struct drm_scatter_gather32 {
887 u32 size; /**< In bytes -- will round to page boundary */
888 u32 handle; /**< Used for mapping / unmapping */
889 } drm_scatter_gather32_t;
890
891 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
892 unsigned long arg)
893 {
894 drm_scatter_gather32_t __user *argp = (void __user *)arg;
895 struct drm_scatter_gather __user *request;
896 int err;
897 unsigned long x;
898
899 request = compat_alloc_user_space(sizeof(*request));
900 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
901 || __get_user(x, &argp->size)
902 || __put_user(x, &request->size))
903 return -EFAULT;
904
905 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
906 if (err)
907 return err;
908
909 /* XXX not sure about the handle conversion here... */
910 if (__get_user(x, &request->handle)
911 || __put_user(x >> PAGE_SHIFT, &argp->handle))
912 return -EFAULT;
913
914 return 0;
915 }
916
917 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
918 unsigned long arg)
919 {
920 drm_scatter_gather32_t __user *argp = (void __user *)arg;
921 struct drm_scatter_gather __user *request;
922 unsigned long x;
923
924 request = compat_alloc_user_space(sizeof(*request));
925 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
926 || __get_user(x, &argp->handle)
927 || __put_user(x << PAGE_SHIFT, &request->handle))
928 return -EFAULT;
929
930 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
931 }
932
933 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
934 typedef struct drm_update_draw32 {
935 drm_drawable_t handle;
936 unsigned int type;
937 unsigned int num;
938 /* 64-bit version has a 32-bit pad here */
939 u64 data; /**< Pointer */
940 } __attribute__((packed)) drm_update_draw32_t;
941
942 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
943 unsigned long arg)
944 {
945 drm_update_draw32_t update32;
946 struct drm_update_draw __user *request;
947 int err;
948
949 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
950 return -EFAULT;
951
952 request = compat_alloc_user_space(sizeof(*request));
953 if (!request ||
954 __put_user(update32.handle, &request->handle) ||
955 __put_user(update32.type, &request->type) ||
956 __put_user(update32.num, &request->num) ||
957 __put_user(update32.data, &request->data))
958 return -EFAULT;
959
960 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
961 return err;
962 }
963 #endif
964
965 struct drm_wait_vblank_request32 {
966 enum drm_vblank_seq_type type;
967 unsigned int sequence;
968 u32 signal;
969 };
970
971 struct drm_wait_vblank_reply32 {
972 enum drm_vblank_seq_type type;
973 unsigned int sequence;
974 s32 tval_sec;
975 s32 tval_usec;
976 };
977
978 typedef union drm_wait_vblank32 {
979 struct drm_wait_vblank_request32 request;
980 struct drm_wait_vblank_reply32 reply;
981 } drm_wait_vblank32_t;
982
983 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
984 unsigned long arg)
985 {
986 drm_wait_vblank32_t __user *argp = (void __user *)arg;
987 drm_wait_vblank32_t req32;
988 union drm_wait_vblank __user *request;
989 int err;
990
991 if (copy_from_user(&req32, argp, sizeof(req32)))
992 return -EFAULT;
993
994 request = compat_alloc_user_space(sizeof(*request));
995 if (!request
996 || __put_user(req32.request.type, &request->request.type)
997 || __put_user(req32.request.sequence, &request->request.sequence)
998 || __put_user(req32.request.signal, &request->request.signal))
999 return -EFAULT;
1000
1001 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1002 if (err)
1003 return err;
1004
1005 if (__get_user(req32.reply.type, &request->reply.type)
1006 || __get_user(req32.reply.sequence, &request->reply.sequence)
1007 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1008 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1009 return -EFAULT;
1010
1011 if (copy_to_user(argp, &req32, sizeof(req32)))
1012 return -EFAULT;
1013
1014 return 0;
1015 }
1016
1017 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1018 typedef struct drm_mode_fb_cmd232 {
1019 u32 fb_id;
1020 u32 width;
1021 u32 height;
1022 u32 pixel_format;
1023 u32 flags;
1024 u32 handles[4];
1025 u32 pitches[4];
1026 u32 offsets[4];
1027 u64 modifier[4];
1028 } __attribute__((packed)) drm_mode_fb_cmd232_t;
1029
1030 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
1031 unsigned long arg)
1032 {
1033 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
1034 struct drm_mode_fb_cmd232 req32;
1035 struct drm_mode_fb_cmd2 __user *req64;
1036 int i;
1037 int err;
1038
1039 if (copy_from_user(&req32, argp, sizeof(req32)))
1040 return -EFAULT;
1041
1042 req64 = compat_alloc_user_space(sizeof(*req64));
1043
1044 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
1045 || __put_user(req32.width, &req64->width)
1046 || __put_user(req32.height, &req64->height)
1047 || __put_user(req32.pixel_format, &req64->pixel_format)
1048 || __put_user(req32.flags, &req64->flags))
1049 return -EFAULT;
1050
1051 for (i = 0; i < 4; i++) {
1052 if (__put_user(req32.handles[i], &req64->handles[i]))
1053 return -EFAULT;
1054 if (__put_user(req32.pitches[i], &req64->pitches[i]))
1055 return -EFAULT;
1056 if (__put_user(req32.offsets[i], &req64->offsets[i]))
1057 return -EFAULT;
1058 if (__put_user(req32.modifier[i], &req64->modifier[i]))
1059 return -EFAULT;
1060 }
1061
1062 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
1063 if (err)
1064 return err;
1065
1066 if (__get_user(req32.fb_id, &req64->fb_id))
1067 return -EFAULT;
1068
1069 if (copy_to_user(argp, &req32, sizeof(req32)))
1070 return -EFAULT;
1071
1072 return 0;
1073 }
1074 #endif
1075
1076 static drm_ioctl_compat_t *drm_compat_ioctls[] = {
1077 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1078 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1079 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1080 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1081 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1082 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1083 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1084 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1085 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1086 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1087 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1088 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1089 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1090 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1091 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1092 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1093 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1094 #if IS_ENABLED(CONFIG_AGP)
1095 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1096 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1097 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1098 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1099 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1100 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1101 #endif
1102 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1103 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1104 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1105 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1106 #endif
1107 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1108 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
1109 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
1110 #endif
1111 };
1112
1113 /**
1114 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
1115 * @filp: file this ioctl is called on
1116 * @cmd: ioctl cmd number
1117 * @arg: user argument
1118 *
1119 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
1120 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
1121 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
1122 * botched IOCTL itself, it must handle those by wrapping this function.
1123 *
1124 * Returns:
1125 * Zero on success, negative error code on failure.
1126 */
1127 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1128 {
1129 unsigned int nr = DRM_IOCTL_NR(cmd);
1130 drm_ioctl_compat_t *fn;
1131 int ret;
1132
1133 /* Assume that ioctls without an explicit compat routine will just
1134 * work. This may not always be a good assumption, but it's better
1135 * than always failing.
1136 */
1137 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1138 return drm_ioctl(filp, cmd, arg);
1139
1140 fn = drm_compat_ioctls[nr];
1141
1142 if (fn != NULL)
1143 ret = (*fn) (filp, cmd, arg);
1144 else
1145 ret = drm_ioctl(filp, cmd, arg);
1146
1147 return ret;
1148 }
1149 EXPORT_SYMBOL(drm_compat_ioctl);
CRIS linux kernel tree