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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#include <drm/drm_core.h>
36
37#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
38#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
39#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
40#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
41#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
42
43#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
44#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
45#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
46#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
47#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
48#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
49#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
50
51#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
52
53#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
54#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
55
56#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
57#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
58
59#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
60#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
61#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
62#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
63#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
64#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
65
66#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
67#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
68
69#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
70
71#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
72
73#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
74
75typedef struct drm_version_32 {
76 int version_major; /**< Major version */
77 int version_minor; /**< Minor version */
78 int version_patchlevel; /**< Patch level */
79 u32 name_len; /**< Length of name buffer */
80 u32 name; /**< Name of driver */
81 u32 date_len; /**< Length of date buffer */
82 u32 date; /**< User-space buffer to hold date */
83 u32 desc_len; /**< Length of desc buffer */
84 u32 desc; /**< User-space buffer to hold desc */
85} drm_version32_t;
86
87static int compat_drm_version(struct file *file, unsigned int cmd,
88 unsigned long arg)
89{
90 drm_version32_t v32;
91 struct drm_version __user *version;
92 int err;
93
94 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
95 return -EFAULT;
96
97 version = compat_alloc_user_space(sizeof(*version));
98 if (!version)
99 return -EFAULT;
100 if (__put_user(v32.name_len, &version->name_len)
101 || __put_user((void __user *)(unsigned long)v32.name,
102 &version->name)
103 || __put_user(v32.date_len, &version->date_len)
104 || __put_user((void __user *)(unsigned long)v32.date,
105 &version->date)
106 || __put_user(v32.desc_len, &version->desc_len)
107 || __put_user((void __user *)(unsigned long)v32.desc,
108 &version->desc))
109 return -EFAULT;
110
111 err = drm_ioctl(file,
112 DRM_IOCTL_VERSION, (unsigned long)version);
113 if (err)
114 return err;
115
116 if (__get_user(v32.version_major, &version->version_major)
117 || __get_user(v32.version_minor, &version->version_minor)
118 || __get_user(v32.version_patchlevel, &version->version_patchlevel)
119 || __get_user(v32.name_len, &version->name_len)
120 || __get_user(v32.date_len, &version->date_len)
121 || __get_user(v32.desc_len, &version->desc_len))
122 return -EFAULT;
123
124 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
125 return -EFAULT;
126 return 0;
127}
128
129typedef struct drm_unique32 {
130 u32 unique_len; /**< Length of unique */
131 u32 unique; /**< Unique name for driver instantiation */
132} drm_unique32_t;
133
134static int compat_drm_getunique(struct file *file, unsigned int cmd,
135 unsigned long arg)
136{
137 drm_unique32_t uq32;
138 struct drm_unique __user *u;
139 int err;
140
141 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
142 return -EFAULT;
143
144 u = compat_alloc_user_space(sizeof(*u));
145 if (!u)
146 return -EFAULT;
147 if (__put_user(uq32.unique_len, &u->unique_len)
148 || __put_user((void __user *)(unsigned long)uq32.unique,
149 &u->unique))
150 return -EFAULT;
151
152 err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
153 if (err)
154 return err;
155
156 if (__get_user(uq32.unique_len, &u->unique_len))
157 return -EFAULT;
158 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
159 return -EFAULT;
160 return 0;
161}
162
163static int compat_drm_setunique(struct file *file, unsigned int cmd,
164 unsigned long arg)
165{
166 drm_unique32_t uq32;
167 struct drm_unique __user *u;
168
169 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
170 return -EFAULT;
171
172 u = compat_alloc_user_space(sizeof(*u));
173 if (!u)
174 return -EFAULT;
175 if (__put_user(uq32.unique_len, &u->unique_len)
176 || __put_user((void __user *)(unsigned long)uq32.unique,
177 &u->unique))
178 return -EFAULT;
179
180 return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
181}
182
183typedef struct drm_map32 {
184 u32 offset; /**< Requested physical address (0 for SAREA)*/
185 u32 size; /**< Requested physical size (bytes) */
186 enum drm_map_type type; /**< Type of memory to map */
187 enum drm_map_flags flags; /**< Flags */
188 u32 handle; /**< User-space: "Handle" to pass to mmap() */
189 int mtrr; /**< MTRR slot used */
190} drm_map32_t;
191
192static int compat_drm_getmap(struct file *file, unsigned int cmd,
193 unsigned long arg)
194{
195 drm_map32_t __user *argp = (void __user *)arg;
196 drm_map32_t m32;
197 struct drm_map __user *map;
198 int idx, err;
199 void *handle;
200
201 if (get_user(idx, &argp->offset))
202 return -EFAULT;
203
204 map = compat_alloc_user_space(sizeof(*map));
205 if (!map)
206 return -EFAULT;
207 if (__put_user(idx, &map->offset))
208 return -EFAULT;
209
210 err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
211 if (err)
212 return err;
213
214 if (__get_user(m32.offset, &map->offset)
215 || __get_user(m32.size, &map->size)
216 || __get_user(m32.type, &map->type)
217 || __get_user(m32.flags, &map->flags)
218 || __get_user(handle, &map->handle)
219 || __get_user(m32.mtrr, &map->mtrr))
220 return -EFAULT;
221
222 m32.handle = (unsigned long)handle;
223 if (copy_to_user(argp, &m32, sizeof(m32)))
224 return -EFAULT;
225 return 0;
226
227}
228
229static int compat_drm_addmap(struct file *file, unsigned int cmd,
230 unsigned long arg)
231{
232 drm_map32_t __user *argp = (void __user *)arg;
233 drm_map32_t m32;
234 struct drm_map __user *map;
235 int err;
236 void *handle;
237
238 if (copy_from_user(&m32, argp, sizeof(m32)))
239 return -EFAULT;
240
241 map = compat_alloc_user_space(sizeof(*map));
242 if (!map)
243 return -EFAULT;
244 if (__put_user(m32.offset, &map->offset)
245 || __put_user(m32.size, &map->size)
246 || __put_user(m32.type, &map->type)
247 || __put_user(m32.flags, &map->flags))
248 return -EFAULT;
249
250 err = drm_ioctl(file, 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)
261 printk_ratelimited(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
271static 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 (!map)
283 return -EFAULT;
284 if (__put_user((void *)(unsigned long)handle, &map->handle))
285 return -EFAULT;
286
287 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
288}
289
290typedef struct drm_client32 {
291 int idx; /**< Which client desired? */
292 int auth; /**< Is client authenticated? */
293 u32 pid; /**< Process ID */
294 u32 uid; /**< User ID */
295 u32 magic; /**< Magic */
296 u32 iocs; /**< Ioctl count */
297} drm_client32_t;
298
299static int compat_drm_getclient(struct file *file, unsigned int cmd,
300 unsigned long arg)
301{
302 drm_client32_t c32;
303 drm_client32_t __user *argp = (void __user *)arg;
304 struct drm_client __user *client;
305 int idx, err;
306
307 if (get_user(idx, &argp->idx))
308 return -EFAULT;
309
310 client = compat_alloc_user_space(sizeof(*client));
311 if (!client)
312 return -EFAULT;
313 if (__put_user(idx, &client->idx))
314 return -EFAULT;
315
316 err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
317 if (err)
318 return err;
319
320 if (__get_user(c32.idx, &client->idx)
321 || __get_user(c32.auth, &client->auth)
322 || __get_user(c32.pid, &client->pid)
323 || __get_user(c32.uid, &client->uid)
324 || __get_user(c32.magic, &client->magic)
325 || __get_user(c32.iocs, &client->iocs))
326 return -EFAULT;
327
328 if (copy_to_user(argp, &c32, sizeof(c32)))
329 return -EFAULT;
330 return 0;
331}
332
333typedef struct drm_stats32 {
334 u32 count;
335 struct {
336 u32 value;
337 enum drm_stat_type type;
338 } data[15];
339} drm_stats32_t;
340
341static int compat_drm_getstats(struct file *file, unsigned int cmd,
342 unsigned long arg)
343{
344 drm_stats32_t s32;
345 drm_stats32_t __user *argp = (void __user *)arg;
346 struct drm_stats __user *stats;
347 int i, err;
348
349 stats = compat_alloc_user_space(sizeof(*stats));
350 if (!stats)
351 return -EFAULT;
352
353 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
354 if (err)
355 return err;
356
357 if (__get_user(s32.count, &stats->count))
358 return -EFAULT;
359 for (i = 0; i < 15; ++i)
360 if (__get_user(s32.data[i].value, &stats->data[i].value)
361 || __get_user(s32.data[i].type, &stats->data[i].type))
362 return -EFAULT;
363
364 if (copy_to_user(argp, &s32, sizeof(s32)))
365 return -EFAULT;
366 return 0;
367}
368
369typedef struct drm_buf_desc32 {
370 int count; /**< Number of buffers of this size */
371 int size; /**< Size in bytes */
372 int low_mark; /**< Low water mark */
373 int high_mark; /**< High water mark */
374 int flags;
375 u32 agp_start; /**< Start address in the AGP aperture */
376} drm_buf_desc32_t;
377
378static int compat_drm_addbufs(struct file *file, unsigned int cmd,
379 unsigned long arg)
380{
381 drm_buf_desc32_t __user *argp = (void __user *)arg;
382 struct drm_buf_desc __user *buf;
383 int err;
384 unsigned long agp_start;
385
386 buf = compat_alloc_user_space(sizeof(*buf));
387 if (!buf || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
388 return -EFAULT;
389
390 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
391 || __get_user(agp_start, &argp->agp_start)
392 || __put_user(agp_start, &buf->agp_start))
393 return -EFAULT;
394
395 err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
396 if (err)
397 return err;
398
399 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
400 || __get_user(agp_start, &buf->agp_start)
401 || __put_user(agp_start, &argp->agp_start))
402 return -EFAULT;
403
404 return 0;
405}
406
407static int compat_drm_markbufs(struct file *file, unsigned int cmd,
408 unsigned long arg)
409{
410 drm_buf_desc32_t b32;
411 drm_buf_desc32_t __user *argp = (void __user *)arg;
412 struct drm_buf_desc __user *buf;
413
414 if (copy_from_user(&b32, argp, sizeof(b32)))
415 return -EFAULT;
416
417 buf = compat_alloc_user_space(sizeof(*buf));
418 if (!buf)
419 return -EFAULT;
420
421 if (__put_user(b32.size, &buf->size)
422 || __put_user(b32.low_mark, &buf->low_mark)
423 || __put_user(b32.high_mark, &buf->high_mark))
424 return -EFAULT;
425
426 return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
427}
428
429typedef struct drm_buf_info32 {
430 int count; /**< Entries in list */
431 u32 list;
432} drm_buf_info32_t;
433
434static int compat_drm_infobufs(struct file *file, unsigned int cmd,
435 unsigned long arg)
436{
437 drm_buf_info32_t req32;
438 drm_buf_info32_t __user *argp = (void __user *)arg;
439 drm_buf_desc32_t __user *to;
440 struct drm_buf_info __user *request;
441 struct drm_buf_desc __user *list;
442 size_t nbytes;
443 int i, err;
444 int count, actual;
445
446 if (copy_from_user(&req32, argp, sizeof(req32)))
447 return -EFAULT;
448
449 count = req32.count;
450 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
451 if (count < 0)
452 count = 0;
453 if (count > 0
454 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
455 return -EFAULT;
456
457 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
458 request = compat_alloc_user_space(nbytes);
459 if (!request)
460 return -EFAULT;
461 list = (struct drm_buf_desc *) (request + 1);
462
463 if (__put_user(count, &request->count)
464 || __put_user(list, &request->list))
465 return -EFAULT;
466
467 err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
468 if (err)
469 return err;
470
471 if (__get_user(actual, &request->count))
472 return -EFAULT;
473 if (count >= actual)
474 for (i = 0; i < actual; ++i)
475 if (__copy_in_user(&to[i], &list[i],
476 offsetof(struct drm_buf_desc, flags)))
477 return -EFAULT;
478
479 if (__put_user(actual, &argp->count))
480 return -EFAULT;
481
482 return 0;
483}
484
485typedef struct drm_buf_pub32 {
486 int idx; /**< Index into the master buffer list */
487 int total; /**< Buffer size */
488 int used; /**< Amount of buffer in use (for DMA) */
489 u32 address; /**< Address of buffer */
490} drm_buf_pub32_t;
491
492typedef struct drm_buf_map32 {
493 int count; /**< Length of the buffer list */
494 u32 virtual; /**< Mmap'd area in user-virtual */
495 u32 list; /**< Buffer information */
496} drm_buf_map32_t;
497
498static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
499 unsigned long arg)
500{
501 drm_buf_map32_t __user *argp = (void __user *)arg;
502 drm_buf_map32_t req32;
503 drm_buf_pub32_t __user *list32;
504 struct drm_buf_map __user *request;
505 struct drm_buf_pub __user *list;
506 int i, err;
507 int count, actual;
508 size_t nbytes;
509 void __user *addr;
510
511 if (copy_from_user(&req32, argp, sizeof(req32)))
512 return -EFAULT;
513 count = req32.count;
514 list32 = (void __user *)(unsigned long)req32.list;
515
516 if (count < 0)
517 return -EINVAL;
518 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
519 request = compat_alloc_user_space(nbytes);
520 if (!request)
521 return -EFAULT;
522 list = (struct drm_buf_pub *) (request + 1);
523
524 if (__put_user(count, &request->count)
525 || __put_user(list, &request->list))
526 return -EFAULT;
527
528 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
529 if (err)
530 return err;
531
532 if (__get_user(actual, &request->count))
533 return -EFAULT;
534 if (count >= actual)
535 for (i = 0; i < actual; ++i)
536 if (__copy_in_user(&list32[i], &list[i],
537 offsetof(struct drm_buf_pub, address))
538 || __get_user(addr, &list[i].address)
539 || __put_user((unsigned long)addr,
540 &list32[i].address))
541 return -EFAULT;
542
543 if (__put_user(actual, &argp->count)
544 || __get_user(addr, &request->virtual)
545 || __put_user((unsigned long)addr, &argp->virtual))
546 return -EFAULT;
547
548 return 0;
549}
550
551typedef struct drm_buf_free32 {
552 int count;
553 u32 list;
554} drm_buf_free32_t;
555
556static int compat_drm_freebufs(struct file *file, unsigned int cmd,
557 unsigned long arg)
558{
559 drm_buf_free32_t req32;
560 struct drm_buf_free __user *request;
561 drm_buf_free32_t __user *argp = (void __user *)arg;
562
563 if (copy_from_user(&req32, argp, sizeof(req32)))
564 return -EFAULT;
565
566 request = compat_alloc_user_space(sizeof(*request));
567 if (!request)
568 return -EFAULT;
569 if (__put_user(req32.count, &request->count)
570 || __put_user((int __user *)(unsigned long)req32.list,
571 &request->list))
572 return -EFAULT;
573
574 return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
575}
576
577typedef struct drm_ctx_priv_map32 {
578 unsigned int ctx_id; /**< Context requesting private mapping */
579 u32 handle; /**< Handle of map */
580} drm_ctx_priv_map32_t;
581
582static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
583 unsigned long arg)
584{
585 drm_ctx_priv_map32_t req32;
586 struct drm_ctx_priv_map __user *request;
587 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
588
589 if (copy_from_user(&req32, argp, sizeof(req32)))
590 return -EFAULT;
591
592 request = compat_alloc_user_space(sizeof(*request));
593 if (!request)
594 return -EFAULT;
595 if (__put_user(req32.ctx_id, &request->ctx_id)
596 || __put_user((void *)(unsigned long)req32.handle,
597 &request->handle))
598 return -EFAULT;
599
600 return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
601}
602
603static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
604 unsigned long arg)
605{
606 struct drm_ctx_priv_map __user *request;
607 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
608 int err;
609 unsigned int ctx_id;
610 void *handle;
611
612 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
613 || __get_user(ctx_id, &argp->ctx_id))
614 return -EFAULT;
615
616 request = compat_alloc_user_space(sizeof(*request));
617 if (!request)
618 return -EFAULT;
619 if (__put_user(ctx_id, &request->ctx_id))
620 return -EFAULT;
621
622 err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
623 if (err)
624 return err;
625
626 if (__get_user(handle, &request->handle)
627 || __put_user((unsigned long)handle, &argp->handle))
628 return -EFAULT;
629
630 return 0;
631}
632
633typedef struct drm_ctx_res32 {
634 int count;
635 u32 contexts;
636} drm_ctx_res32_t;
637
638static int compat_drm_resctx(struct file *file, unsigned int cmd,
639 unsigned long arg)
640{
641 drm_ctx_res32_t __user *argp = (void __user *)arg;
642 drm_ctx_res32_t res32;
643 struct drm_ctx_res __user *res;
644 int err;
645
646 if (copy_from_user(&res32, argp, sizeof(res32)))
647 return -EFAULT;
648
649 res = compat_alloc_user_space(sizeof(*res));
650 if (!res)
651 return -EFAULT;
652 if (__put_user(res32.count, &res->count)
653 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
654 &res->contexts))
655 return -EFAULT;
656
657 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
658 if (err)
659 return err;
660
661 if (__get_user(res32.count, &res->count)
662 || __put_user(res32.count, &argp->count))
663 return -EFAULT;
664
665 return 0;
666}
667
668typedef struct drm_dma32 {
669 int context; /**< Context handle */
670 int send_count; /**< Number of buffers to send */
671 u32 send_indices; /**< List of handles to buffers */
672 u32 send_sizes; /**< Lengths of data to send */
673 enum drm_dma_flags flags; /**< Flags */
674 int request_count; /**< Number of buffers requested */
675 int request_size; /**< Desired size for buffers */
676 u32 request_indices; /**< Buffer information */
677 u32 request_sizes;
678 int granted_count; /**< Number of buffers granted */
679} drm_dma32_t;
680
681static int compat_drm_dma(struct file *file, unsigned int cmd,
682 unsigned long arg)
683{
684 drm_dma32_t d32;
685 drm_dma32_t __user *argp = (void __user *)arg;
686 struct drm_dma __user *d;
687 int err;
688
689 if (copy_from_user(&d32, argp, sizeof(d32)))
690 return -EFAULT;
691
692 d = compat_alloc_user_space(sizeof(*d));
693 if (!d)
694 return -EFAULT;
695
696 if (__put_user(d32.context, &d->context)
697 || __put_user(d32.send_count, &d->send_count)
698 || __put_user((int __user *)(unsigned long)d32.send_indices,
699 &d->send_indices)
700 || __put_user((int __user *)(unsigned long)d32.send_sizes,
701 &d->send_sizes)
702 || __put_user(d32.flags, &d->flags)
703 || __put_user(d32.request_count, &d->request_count)
704 || __put_user((int __user *)(unsigned long)d32.request_indices,
705 &d->request_indices)
706 || __put_user((int __user *)(unsigned long)d32.request_sizes,
707 &d->request_sizes))
708 return -EFAULT;
709
710 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
711 if (err)
712 return err;
713
714 if (__get_user(d32.request_size, &d->request_size)
715 || __get_user(d32.granted_count, &d->granted_count)
716 || __put_user(d32.request_size, &argp->request_size)
717 || __put_user(d32.granted_count, &argp->granted_count))
718 return -EFAULT;
719
720 return 0;
721}
722
723#if IS_ENABLED(CONFIG_AGP)
724typedef struct drm_agp_mode32 {
725 u32 mode; /**< AGP mode */
726} drm_agp_mode32_t;
727
728static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
729 unsigned long arg)
730{
731 drm_agp_mode32_t __user *argp = (void __user *)arg;
732 drm_agp_mode32_t m32;
733 struct drm_agp_mode __user *mode;
734
735 if (get_user(m32.mode, &argp->mode))
736 return -EFAULT;
737
738 mode = compat_alloc_user_space(sizeof(*mode));
739 if (put_user(m32.mode, &mode->mode))
740 return -EFAULT;
741
742 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
743}
744
745typedef struct drm_agp_info32 {
746 int agp_version_major;
747 int agp_version_minor;
748 u32 mode;
749 u32 aperture_base; /* physical address */
750 u32 aperture_size; /* bytes */
751 u32 memory_allowed; /* bytes */
752 u32 memory_used;
753
754 /* PCI information */
755 unsigned short id_vendor;
756 unsigned short id_device;
757} drm_agp_info32_t;
758
759static int compat_drm_agp_info(struct file *file, unsigned int cmd,
760 unsigned long arg)
761{
762 drm_agp_info32_t __user *argp = (void __user *)arg;
763 drm_agp_info32_t i32;
764 struct drm_agp_info __user *info;
765 int err;
766
767 info = compat_alloc_user_space(sizeof(*info));
768 if (!info)
769 return -EFAULT;
770
771 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
772 if (err)
773 return err;
774
775 if (__get_user(i32.agp_version_major, &info->agp_version_major)
776 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
777 || __get_user(i32.mode, &info->mode)
778 || __get_user(i32.aperture_base, &info->aperture_base)
779 || __get_user(i32.aperture_size, &info->aperture_size)
780 || __get_user(i32.memory_allowed, &info->memory_allowed)
781 || __get_user(i32.memory_used, &info->memory_used)
782 || __get_user(i32.id_vendor, &info->id_vendor)
783 || __get_user(i32.id_device, &info->id_device))
784 return -EFAULT;
785
786 if (copy_to_user(argp, &i32, sizeof(i32)))
787 return -EFAULT;
788
789 return 0;
790}
791
792typedef struct drm_agp_buffer32 {
793 u32 size; /**< In bytes -- will round to page boundary */
794 u32 handle; /**< Used for binding / unbinding */
795 u32 type; /**< Type of memory to allocate */
796 u32 physical; /**< Physical used by i810 */
797} drm_agp_buffer32_t;
798
799static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
800 unsigned long arg)
801{
802 drm_agp_buffer32_t __user *argp = (void __user *)arg;
803 drm_agp_buffer32_t req32;
804 struct drm_agp_buffer __user *request;
805 int err;
806
807 if (copy_from_user(&req32, argp, sizeof(req32)))
808 return -EFAULT;
809
810 request = compat_alloc_user_space(sizeof(*request));
811 if (!request
812 || __put_user(req32.size, &request->size)
813 || __put_user(req32.type, &request->type))
814 return -EFAULT;
815
816 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
817 if (err)
818 return err;
819
820 if (__get_user(req32.handle, &request->handle)
821 || __get_user(req32.physical, &request->physical)
822 || copy_to_user(argp, &req32, sizeof(req32))) {
823 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
824 return -EFAULT;
825 }
826
827 return 0;
828}
829
830static int compat_drm_agp_free(struct file *file, unsigned int cmd,
831 unsigned long arg)
832{
833 drm_agp_buffer32_t __user *argp = (void __user *)arg;
834 struct drm_agp_buffer __user *request;
835 u32 handle;
836
837 request = compat_alloc_user_space(sizeof(*request));
838 if (!request
839 || get_user(handle, &argp->handle)
840 || __put_user(handle, &request->handle))
841 return -EFAULT;
842
843 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
844}
845
846typedef struct drm_agp_binding32 {
847 u32 handle; /**< From drm_agp_buffer */
848 u32 offset; /**< In bytes -- will round to page boundary */
849} drm_agp_binding32_t;
850
851static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
852 unsigned long arg)
853{
854 drm_agp_binding32_t __user *argp = (void __user *)arg;
855 drm_agp_binding32_t req32;
856 struct drm_agp_binding __user *request;
857
858 if (copy_from_user(&req32, argp, sizeof(req32)))
859 return -EFAULT;
860
861 request = compat_alloc_user_space(sizeof(*request));
862 if (!request
863 || __put_user(req32.handle, &request->handle)
864 || __put_user(req32.offset, &request->offset))
865 return -EFAULT;
866
867 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
868}
869
870static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
871 unsigned long arg)
872{
873 drm_agp_binding32_t __user *argp = (void __user *)arg;
874 struct drm_agp_binding __user *request;
875 u32 handle;
876
877 request = compat_alloc_user_space(sizeof(*request));
878 if (!request
879 || get_user(handle, &argp->handle)
880 || __put_user(handle, &request->handle))
881 return -EFAULT;
882
883 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
884}
885#endif /* CONFIG_AGP */
886
887typedef struct drm_scatter_gather32 {
888 u32 size; /**< In bytes -- will round to page boundary */
889 u32 handle; /**< Used for mapping / unmapping */
890} drm_scatter_gather32_t;
891
892static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
893 unsigned long arg)
894{
895 drm_scatter_gather32_t __user *argp = (void __user *)arg;
896 struct drm_scatter_gather __user *request;
897 int err;
898 unsigned long x;
899
900 request = compat_alloc_user_space(sizeof(*request));
901 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
902 || __get_user(x, &argp->size)
903 || __put_user(x, &request->size))
904 return -EFAULT;
905
906 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
907 if (err)
908 return err;
909
910 /* XXX not sure about the handle conversion here... */
911 if (__get_user(x, &request->handle)
912 || __put_user(x >> PAGE_SHIFT, &argp->handle))
913 return -EFAULT;
914
915 return 0;
916}
917
918static int compat_drm_sg_free(struct file *file, unsigned int cmd,
919 unsigned long arg)
920{
921 drm_scatter_gather32_t __user *argp = (void __user *)arg;
922 struct drm_scatter_gather __user *request;
923 unsigned long x;
924
925 request = compat_alloc_user_space(sizeof(*request));
926 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
927 || __get_user(x, &argp->handle)
928 || __put_user(x << PAGE_SHIFT, &request->handle))
929 return -EFAULT;
930
931 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
932}
933
934#if defined(CONFIG_X86) || defined(CONFIG_IA64)
935typedef struct drm_update_draw32 {
936 drm_drawable_t handle;
937 unsigned int type;
938 unsigned int num;
939 /* 64-bit version has a 32-bit pad here */
940 u64 data; /**< Pointer */
941} __attribute__((packed)) drm_update_draw32_t;
942
943static int compat_drm_update_draw(struct file *file, unsigned int cmd,
944 unsigned long arg)
945{
946 drm_update_draw32_t update32;
947 struct drm_update_draw __user *request;
948 int err;
949
950 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
951 return -EFAULT;
952
953 request = compat_alloc_user_space(sizeof(*request));
954 if (!request ||
955 __put_user(update32.handle, &request->handle) ||
956 __put_user(update32.type, &request->type) ||
957 __put_user(update32.num, &request->num) ||
958 __put_user(update32.data, &request->data))
959 return -EFAULT;
960
961 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
962 return err;
963}
964#endif
965
966struct drm_wait_vblank_request32 {
967 enum drm_vblank_seq_type type;
968 unsigned int sequence;
969 u32 signal;
970};
971
972struct drm_wait_vblank_reply32 {
973 enum drm_vblank_seq_type type;
974 unsigned int sequence;
975 s32 tval_sec;
976 s32 tval_usec;
977};
978
979typedef union drm_wait_vblank32 {
980 struct drm_wait_vblank_request32 request;
981 struct drm_wait_vblank_reply32 reply;
982} drm_wait_vblank32_t;
983
984static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
985 unsigned long arg)
986{
987 drm_wait_vblank32_t __user *argp = (void __user *)arg;
988 drm_wait_vblank32_t req32;
989 union drm_wait_vblank __user *request;
990 int err;
991
992 if (copy_from_user(&req32, argp, sizeof(req32)))
993 return -EFAULT;
994
995 request = compat_alloc_user_space(sizeof(*request));
996 if (!request
997 || __put_user(req32.request.type, &request->request.type)
998 || __put_user(req32.request.sequence, &request->request.sequence)
999 || __put_user(req32.request.signal, &request->request.signal))
1000 return -EFAULT;
1001
1002 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1003 if (err)
1004 return err;
1005
1006 if (__get_user(req32.reply.type, &request->reply.type)
1007 || __get_user(req32.reply.sequence, &request->reply.sequence)
1008 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1009 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1010 return -EFAULT;
1011
1012 if (copy_to_user(argp, &req32, sizeof(req32)))
1013 return -EFAULT;
1014
1015 return 0;
1016}
1017
1018typedef 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
1030static 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
1075static drm_ioctl_compat_t *drm_compat_ioctls[] = {
1076 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1077 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1078 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1079 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1080 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1081 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1082 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1083 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1084 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1085 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1086 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1087 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1088 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1089 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1090 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1091 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1092 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1093#if IS_ENABLED(CONFIG_AGP)
1094 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1095 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1096 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1097 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1098 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1099 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1100#endif
1101 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1102 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1103#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1104 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1105#endif
1106 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1107 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
1108};
1109
1110/**
1111 * Called whenever a 32-bit process running under a 64-bit kernel
1112 * performs an ioctl on /dev/drm.
1113 *
1114 * \param file_priv DRM file private.
1115 * \param cmd command.
1116 * \param arg user argument.
1117 * \return zero on success or negative number on failure.
1118 */
1119long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1120{
1121 unsigned int nr = DRM_IOCTL_NR(cmd);
1122 drm_ioctl_compat_t *fn;
1123 int ret;
1124
1125 /* Assume that ioctls without an explicit compat routine will just
1126 * work. This may not always be a good assumption, but it's better
1127 * than always failing.
1128 */
1129 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1130 return drm_ioctl(filp, cmd, arg);
1131
1132 fn = drm_compat_ioctls[nr];
1133
1134 if (fn != NULL)
1135 ret = (*fn) (filp, cmd, arg);
1136 else
1137 ret = drm_ioctl(filp, cmd, arg);
1138
1139 return ret;
1140}
1141
1142EXPORT_SYMBOL(drm_compat_ioctl);
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/drm_device.h>
35#include <drm/drm_file.h>
36#include <drm/drm_print.h>
37
38#include "drm_crtc_internal.h"
39#include "drm_internal.h"
40
41#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
42#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
43#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
44#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
45#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
46
47#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
48#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
49#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
50#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
51#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
52#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
53#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
54
55#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
56
57#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
58#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
59
60#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
61#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
62
63#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
64#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
65#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
66#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
67#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
68#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
69
70#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
71#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
72
73#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
74
75#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
76
77#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
78
79typedef struct drm_version_32 {
80 int version_major; /* Major version */
81 int version_minor; /* Minor version */
82 int version_patchlevel; /* Patch level */
83 u32 name_len; /* Length of name buffer */
84 u32 name; /* Name of driver */
85 u32 date_len; /* Length of date buffer */
86 u32 date; /* User-space buffer to hold date */
87 u32 desc_len; /* Length of desc buffer */
88 u32 desc; /* User-space buffer to hold desc */
89} drm_version32_t;
90
91static int compat_drm_version(struct file *file, unsigned int cmd,
92 unsigned long arg)
93{
94 drm_version32_t v32;
95 struct drm_version v;
96 int err;
97
98 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
99 return -EFAULT;
100
101 memset(&v, 0, sizeof(v));
102
103 v = (struct drm_version) {
104 .name_len = v32.name_len,
105 .name = compat_ptr(v32.name),
106 .date_len = v32.date_len,
107 .date = compat_ptr(v32.date),
108 .desc_len = v32.desc_len,
109 .desc = compat_ptr(v32.desc),
110 };
111 err = drm_ioctl_kernel(file, drm_version, &v,
112 DRM_RENDER_ALLOW);
113 if (err)
114 return err;
115
116 v32.version_major = v.version_major;
117 v32.version_minor = v.version_minor;
118 v32.version_patchlevel = v.version_patchlevel;
119 v32.name_len = v.name_len;
120 v32.date_len = v.date_len;
121 v32.desc_len = v.desc_len;
122 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
123 return -EFAULT;
124 return 0;
125}
126
127typedef struct drm_unique32 {
128 u32 unique_len; /* Length of unique */
129 u32 unique; /* Unique name for driver instantiation */
130} drm_unique32_t;
131
132static int compat_drm_getunique(struct file *file, unsigned int cmd,
133 unsigned long arg)
134{
135 drm_unique32_t uq32;
136 struct drm_unique uq;
137 int err;
138
139 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
140 return -EFAULT;
141
142 memset(&uq, 0, sizeof(uq));
143
144 uq = (struct drm_unique){
145 .unique_len = uq32.unique_len,
146 .unique = compat_ptr(uq32.unique),
147 };
148
149 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0);
150 if (err)
151 return err;
152
153 uq32.unique_len = uq.unique_len;
154 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
155 return -EFAULT;
156 return 0;
157}
158
159static int compat_drm_setunique(struct file *file, unsigned int cmd,
160 unsigned long arg)
161{
162 /* it's dead */
163 return -EINVAL;
164}
165
166typedef struct drm_client32 {
167 int idx; /* Which client desired? */
168 int auth; /* Is client authenticated? */
169 u32 pid; /* Process ID */
170 u32 uid; /* User ID */
171 u32 magic; /* Magic */
172 u32 iocs; /* Ioctl count */
173} drm_client32_t;
174
175static int compat_drm_getclient(struct file *file, unsigned int cmd,
176 unsigned long arg)
177{
178 drm_client32_t c32;
179 drm_client32_t __user *argp = (void __user *)arg;
180 struct drm_client client;
181 int err;
182
183 if (copy_from_user(&c32, argp, sizeof(c32)))
184 return -EFAULT;
185
186 memset(&client, 0, sizeof(client));
187
188 client.idx = c32.idx;
189
190 err = drm_ioctl_kernel(file, drm_getclient, &client, 0);
191 if (err)
192 return err;
193
194 c32.idx = client.idx;
195 c32.auth = client.auth;
196 c32.pid = client.pid;
197 c32.uid = client.uid;
198 c32.magic = client.magic;
199 c32.iocs = client.iocs;
200
201 if (copy_to_user(argp, &c32, sizeof(c32)))
202 return -EFAULT;
203 return 0;
204}
205
206typedef struct drm_stats32 {
207 u32 count;
208 struct {
209 u32 value;
210 enum drm_stat_type type;
211 } data[15];
212} drm_stats32_t;
213
214static int compat_drm_getstats(struct file *file, unsigned int cmd,
215 unsigned long arg)
216{
217 drm_stats32_t __user *argp = (void __user *)arg;
218
219 /* getstats is defunct, just clear */
220 if (clear_user(argp, sizeof(drm_stats32_t)))
221 return -EFAULT;
222 return 0;
223}
224
225#if defined(CONFIG_X86)
226typedef struct drm_update_draw32 {
227 drm_drawable_t handle;
228 unsigned int type;
229 unsigned int num;
230 /* 64-bit version has a 32-bit pad here */
231 u64 data; /**< Pointer */
232} __attribute__((packed)) drm_update_draw32_t;
233
234static int compat_drm_update_draw(struct file *file, unsigned int cmd,
235 unsigned long arg)
236{
237 /* update_draw is defunct */
238 return 0;
239}
240#endif
241
242struct drm_wait_vblank_request32 {
243 enum drm_vblank_seq_type type;
244 unsigned int sequence;
245 u32 signal;
246};
247
248struct drm_wait_vblank_reply32 {
249 enum drm_vblank_seq_type type;
250 unsigned int sequence;
251 s32 tval_sec;
252 s32 tval_usec;
253};
254
255typedef union drm_wait_vblank32 {
256 struct drm_wait_vblank_request32 request;
257 struct drm_wait_vblank_reply32 reply;
258} drm_wait_vblank32_t;
259
260static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
261 unsigned long arg)
262{
263 drm_wait_vblank32_t __user *argp = (void __user *)arg;
264 drm_wait_vblank32_t req32;
265 union drm_wait_vblank req;
266 int err;
267
268 if (copy_from_user(&req32, argp, sizeof(req32)))
269 return -EFAULT;
270
271 memset(&req, 0, sizeof(req));
272
273 req.request.type = req32.request.type;
274 req.request.sequence = req32.request.sequence;
275 req.request.signal = req32.request.signal;
276 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, 0);
277
278 req32.reply.type = req.reply.type;
279 req32.reply.sequence = req.reply.sequence;
280 req32.reply.tval_sec = req.reply.tval_sec;
281 req32.reply.tval_usec = req.reply.tval_usec;
282 if (copy_to_user(argp, &req32, sizeof(req32)))
283 return -EFAULT;
284
285 return err;
286}
287
288#if defined(CONFIG_X86)
289typedef struct drm_mode_fb_cmd232 {
290 u32 fb_id;
291 u32 width;
292 u32 height;
293 u32 pixel_format;
294 u32 flags;
295 u32 handles[4];
296 u32 pitches[4];
297 u32 offsets[4];
298 u64 modifier[4];
299} __attribute__((packed)) drm_mode_fb_cmd232_t;
300
301static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
302 unsigned long arg)
303{
304 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
305 struct drm_mode_fb_cmd2 req64;
306 int err;
307
308 memset(&req64, 0, sizeof(req64));
309
310 if (copy_from_user(&req64, argp,
311 offsetof(drm_mode_fb_cmd232_t, modifier)))
312 return -EFAULT;
313
314 if (copy_from_user(&req64.modifier, &argp->modifier,
315 sizeof(req64.modifier)))
316 return -EFAULT;
317
318 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0);
319 if (err)
320 return err;
321
322 if (put_user(req64.fb_id, &argp->fb_id))
323 return -EFAULT;
324
325 return 0;
326}
327#endif
328
329static struct {
330 drm_ioctl_compat_t *fn;
331 char *name;
332} drm_compat_ioctls[] = {
333#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
334 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
335 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
336 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
337 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
338 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
339#if defined(CONFIG_X86)
340 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
341#endif
342 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
343#if defined(CONFIG_X86)
344 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
345#endif
346};
347
348/**
349 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
350 * @filp: file this ioctl is called on
351 * @cmd: ioctl cmd number
352 * @arg: user argument
353 *
354 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
355 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
356 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
357 * botched IOCTL itself, it must handle those by wrapping this function.
358 *
359 * Returns:
360 * Zero on success, negative error code on failure.
361 */
362long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
363{
364 unsigned int nr = DRM_IOCTL_NR(cmd);
365 struct drm_file *file_priv = filp->private_data;
366 struct drm_device *dev = file_priv->minor->dev;
367 drm_ioctl_compat_t *fn;
368 int ret;
369
370 /* Assume that ioctls without an explicit compat routine will just
371 * work. This may not always be a good assumption, but it's better
372 * than always failing.
373 */
374 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
375 return drm_ioctl(filp, cmd, arg);
376
377 fn = drm_compat_ioctls[nr].fn;
378 if (!fn)
379 return drm_ioctl(filp, cmd, arg);
380
381 drm_dbg_core(dev, "comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n",
382 current->comm, task_pid_nr(current),
383 (long)old_encode_dev(file_priv->minor->kdev->devt),
384 file_priv->authenticated,
385 drm_compat_ioctls[nr].name);
386 ret = (*fn)(filp, cmd, arg);
387 if (ret)
388 drm_dbg_core(dev, "ret = %d\n", ret);
389 return ret;
390}
391EXPORT_SYMBOL(drm_compat_ioctl);