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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
33#include "drmP.h"
34#include "drm_core.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
72typedef struct drm_version_32 {
73 int version_major; /**< Major version */
74 int version_minor; /**< Minor version */
75 int version_patchlevel; /**< Patch level */
76 u32 name_len; /**< Length of name buffer */
77 u32 name; /**< Name of driver */
78 u32 date_len; /**< Length of date buffer */
79 u32 date; /**< User-space buffer to hold date */
80 u32 desc_len; /**< Length of desc buffer */
81 u32 desc; /**< User-space buffer to hold desc */
82} drm_version32_t;
83
84static int compat_drm_version(struct file *file, unsigned int cmd,
85 unsigned long arg)
86{
87 drm_version32_t v32;
88 struct drm_version __user *version;
89 int err;
90
91 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
92 return -EFAULT;
93
94 version = compat_alloc_user_space(sizeof(*version));
95 if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
96 return -EFAULT;
97 if (__put_user(v32.name_len, &version->name_len)
98 || __put_user((void __user *)(unsigned long)v32.name,
99 &version->name)
100 || __put_user(v32.date_len, &version->date_len)
101 || __put_user((void __user *)(unsigned long)v32.date,
102 &version->date)
103 || __put_user(v32.desc_len, &version->desc_len)
104 || __put_user((void __user *)(unsigned long)v32.desc,
105 &version->desc))
106 return -EFAULT;
107
108 err = drm_ioctl(file,
109 DRM_IOCTL_VERSION, (unsigned long)version);
110 if (err)
111 return err;
112
113 if (__get_user(v32.version_major, &version->version_major)
114 || __get_user(v32.version_minor, &version->version_minor)
115 || __get_user(v32.version_patchlevel, &version->version_patchlevel)
116 || __get_user(v32.name_len, &version->name_len)
117 || __get_user(v32.date_len, &version->date_len)
118 || __get_user(v32.desc_len, &version->desc_len))
119 return -EFAULT;
120
121 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
122 return -EFAULT;
123 return 0;
124}
125
126typedef struct drm_unique32 {
127 u32 unique_len; /**< Length of unique */
128 u32 unique; /**< Unique name for driver instantiation */
129} drm_unique32_t;
130
131static int compat_drm_getunique(struct file *file, unsigned int cmd,
132 unsigned long arg)
133{
134 drm_unique32_t uq32;
135 struct drm_unique __user *u;
136 int err;
137
138 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
139 return -EFAULT;
140
141 u = compat_alloc_user_space(sizeof(*u));
142 if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
143 return -EFAULT;
144 if (__put_user(uq32.unique_len, &u->unique_len)
145 || __put_user((void __user *)(unsigned long)uq32.unique,
146 &u->unique))
147 return -EFAULT;
148
149 err = drm_ioctl(file, 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
160static 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, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
178}
179
180typedef struct drm_map32 {
181 u32 offset; /**< Requested physical address (0 for SAREA)*/
182 u32 size; /**< Requested physical size (bytes) */
183 enum drm_map_type type; /**< Type of memory to map */
184 enum drm_map_flags flags; /**< Flags */
185 u32 handle; /**< User-space: "Handle" to pass to mmap() */
186 int mtrr; /**< MTRR slot used */
187} drm_map32_t;
188
189static int compat_drm_getmap(struct file *file, unsigned int cmd,
190 unsigned long arg)
191{
192 drm_map32_t __user *argp = (void __user *)arg;
193 drm_map32_t m32;
194 struct drm_map __user *map;
195 int idx, err;
196 void *handle;
197
198 if (get_user(idx, &argp->offset))
199 return -EFAULT;
200
201 map = compat_alloc_user_space(sizeof(*map));
202 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
203 return -EFAULT;
204 if (__put_user(idx, &map->offset))
205 return -EFAULT;
206
207 err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
208 if (err)
209 return err;
210
211 if (__get_user(m32.offset, &map->offset)
212 || __get_user(m32.size, &map->size)
213 || __get_user(m32.type, &map->type)
214 || __get_user(m32.flags, &map->flags)
215 || __get_user(handle, &map->handle)
216 || __get_user(m32.mtrr, &map->mtrr))
217 return -EFAULT;
218
219 m32.handle = (unsigned long)handle;
220 if (copy_to_user(argp, &m32, sizeof(m32)))
221 return -EFAULT;
222 return 0;
223
224}
225
226static int compat_drm_addmap(struct file *file, unsigned int cmd,
227 unsigned long arg)
228{
229 drm_map32_t __user *argp = (void __user *)arg;
230 drm_map32_t m32;
231 struct drm_map __user *map;
232 int err;
233 void *handle;
234
235 if (copy_from_user(&m32, argp, sizeof(m32)))
236 return -EFAULT;
237
238 map = compat_alloc_user_space(sizeof(*map));
239 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
240 return -EFAULT;
241 if (__put_user(m32.offset, &map->offset)
242 || __put_user(m32.size, &map->size)
243 || __put_user(m32.type, &map->type)
244 || __put_user(m32.flags, &map->flags))
245 return -EFAULT;
246
247 err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
248 if (err)
249 return err;
250
251 if (__get_user(m32.offset, &map->offset)
252 || __get_user(m32.mtrr, &map->mtrr)
253 || __get_user(handle, &map->handle))
254 return -EFAULT;
255
256 m32.handle = (unsigned long)handle;
257 if (m32.handle != (unsigned long)handle)
258 printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle"
259 " %p for type %d offset %x\n",
260 handle, m32.type, m32.offset);
261
262 if (copy_to_user(argp, &m32, sizeof(m32)))
263 return -EFAULT;
264
265 return 0;
266}
267
268static int compat_drm_rmmap(struct file *file, unsigned int cmd,
269 unsigned long arg)
270{
271 drm_map32_t __user *argp = (void __user *)arg;
272 struct drm_map __user *map;
273 u32 handle;
274
275 if (get_user(handle, &argp->handle))
276 return -EFAULT;
277
278 map = compat_alloc_user_space(sizeof(*map));
279 if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
280 return -EFAULT;
281 if (__put_user((void *)(unsigned long)handle, &map->handle))
282 return -EFAULT;
283
284 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
285}
286
287typedef struct drm_client32 {
288 int idx; /**< Which client desired? */
289 int auth; /**< Is client authenticated? */
290 u32 pid; /**< Process ID */
291 u32 uid; /**< User ID */
292 u32 magic; /**< Magic */
293 u32 iocs; /**< Ioctl count */
294} drm_client32_t;
295
296static int compat_drm_getclient(struct file *file, unsigned int cmd,
297 unsigned long arg)
298{
299 drm_client32_t c32;
300 drm_client32_t __user *argp = (void __user *)arg;
301 struct drm_client __user *client;
302 int idx, err;
303
304 if (get_user(idx, &argp->idx))
305 return -EFAULT;
306
307 client = compat_alloc_user_space(sizeof(*client));
308 if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
309 return -EFAULT;
310 if (__put_user(idx, &client->idx))
311 return -EFAULT;
312
313 err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
314 if (err)
315 return err;
316
317 if (__get_user(c32.auth, &client->auth)
318 || __get_user(c32.pid, &client->pid)
319 || __get_user(c32.uid, &client->uid)
320 || __get_user(c32.magic, &client->magic)
321 || __get_user(c32.iocs, &client->iocs))
322 return -EFAULT;
323
324 if (copy_to_user(argp, &c32, sizeof(c32)))
325 return -EFAULT;
326 return 0;
327}
328
329typedef struct drm_stats32 {
330 u32 count;
331 struct {
332 u32 value;
333 enum drm_stat_type type;
334 } data[15];
335} drm_stats32_t;
336
337static int compat_drm_getstats(struct file *file, unsigned int cmd,
338 unsigned long arg)
339{
340 drm_stats32_t s32;
341 drm_stats32_t __user *argp = (void __user *)arg;
342 struct drm_stats __user *stats;
343 int i, err;
344
345 stats = compat_alloc_user_space(sizeof(*stats));
346 if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
347 return -EFAULT;
348
349 err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
350 if (err)
351 return err;
352
353 if (__get_user(s32.count, &stats->count))
354 return -EFAULT;
355 for (i = 0; i < 15; ++i)
356 if (__get_user(s32.data[i].value, &stats->data[i].value)
357 || __get_user(s32.data[i].type, &stats->data[i].type))
358 return -EFAULT;
359
360 if (copy_to_user(argp, &s32, sizeof(s32)))
361 return -EFAULT;
362 return 0;
363}
364
365typedef struct drm_buf_desc32 {
366 int count; /**< Number of buffers of this size */
367 int size; /**< Size in bytes */
368 int low_mark; /**< Low water mark */
369 int high_mark; /**< High water mark */
370 int flags;
371 u32 agp_start; /**< Start address in the AGP aperture */
372} drm_buf_desc32_t;
373
374static int compat_drm_addbufs(struct file *file, unsigned int cmd,
375 unsigned long arg)
376{
377 drm_buf_desc32_t __user *argp = (void __user *)arg;
378 struct drm_buf_desc __user *buf;
379 int err;
380 unsigned long agp_start;
381
382 buf = compat_alloc_user_space(sizeof(*buf));
383 if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
384 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
385 return -EFAULT;
386
387 if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
388 || __get_user(agp_start, &argp->agp_start)
389 || __put_user(agp_start, &buf->agp_start))
390 return -EFAULT;
391
392 err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
393 if (err)
394 return err;
395
396 if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
397 || __get_user(agp_start, &buf->agp_start)
398 || __put_user(agp_start, &argp->agp_start))
399 return -EFAULT;
400
401 return 0;
402}
403
404static int compat_drm_markbufs(struct file *file, unsigned int cmd,
405 unsigned long arg)
406{
407 drm_buf_desc32_t b32;
408 drm_buf_desc32_t __user *argp = (void __user *)arg;
409 struct drm_buf_desc __user *buf;
410
411 if (copy_from_user(&b32, argp, sizeof(b32)))
412 return -EFAULT;
413
414 buf = compat_alloc_user_space(sizeof(*buf));
415 if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
416 return -EFAULT;
417
418 if (__put_user(b32.size, &buf->size)
419 || __put_user(b32.low_mark, &buf->low_mark)
420 || __put_user(b32.high_mark, &buf->high_mark))
421 return -EFAULT;
422
423 return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
424}
425
426typedef struct drm_buf_info32 {
427 int count; /**< Entries in list */
428 u32 list;
429} drm_buf_info32_t;
430
431static int compat_drm_infobufs(struct file *file, unsigned int cmd,
432 unsigned long arg)
433{
434 drm_buf_info32_t req32;
435 drm_buf_info32_t __user *argp = (void __user *)arg;
436 drm_buf_desc32_t __user *to;
437 struct drm_buf_info __user *request;
438 struct drm_buf_desc __user *list;
439 size_t nbytes;
440 int i, err;
441 int count, actual;
442
443 if (copy_from_user(&req32, argp, sizeof(req32)))
444 return -EFAULT;
445
446 count = req32.count;
447 to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
448 if (count < 0)
449 count = 0;
450 if (count > 0
451 && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
452 return -EFAULT;
453
454 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
455 request = compat_alloc_user_space(nbytes);
456 if (!access_ok(VERIFY_WRITE, request, nbytes))
457 return -EFAULT;
458 list = (struct drm_buf_desc *) (request + 1);
459
460 if (__put_user(count, &request->count)
461 || __put_user(list, &request->list))
462 return -EFAULT;
463
464 err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
465 if (err)
466 return err;
467
468 if (__get_user(actual, &request->count))
469 return -EFAULT;
470 if (count >= actual)
471 for (i = 0; i < actual; ++i)
472 if (__copy_in_user(&to[i], &list[i],
473 offsetof(struct drm_buf_desc, flags)))
474 return -EFAULT;
475
476 if (__put_user(actual, &argp->count))
477 return -EFAULT;
478
479 return 0;
480}
481
482typedef struct drm_buf_pub32 {
483 int idx; /**< Index into the master buffer list */
484 int total; /**< Buffer size */
485 int used; /**< Amount of buffer in use (for DMA) */
486 u32 address; /**< Address of buffer */
487} drm_buf_pub32_t;
488
489typedef struct drm_buf_map32 {
490 int count; /**< Length of the buffer list */
491 u32 virtual; /**< Mmap'd area in user-virtual */
492 u32 list; /**< Buffer information */
493} drm_buf_map32_t;
494
495static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
496 unsigned long arg)
497{
498 drm_buf_map32_t __user *argp = (void __user *)arg;
499 drm_buf_map32_t req32;
500 drm_buf_pub32_t __user *list32;
501 struct drm_buf_map __user *request;
502 struct drm_buf_pub __user *list;
503 int i, err;
504 int count, actual;
505 size_t nbytes;
506 void __user *addr;
507
508 if (copy_from_user(&req32, argp, sizeof(req32)))
509 return -EFAULT;
510 count = req32.count;
511 list32 = (void __user *)(unsigned long)req32.list;
512
513 if (count < 0)
514 return -EINVAL;
515 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
516 request = compat_alloc_user_space(nbytes);
517 if (!access_ok(VERIFY_WRITE, request, nbytes))
518 return -EFAULT;
519 list = (struct drm_buf_pub *) (request + 1);
520
521 if (__put_user(count, &request->count)
522 || __put_user(list, &request->list))
523 return -EFAULT;
524
525 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
526 if (err)
527 return err;
528
529 if (__get_user(actual, &request->count))
530 return -EFAULT;
531 if (count >= actual)
532 for (i = 0; i < actual; ++i)
533 if (__copy_in_user(&list32[i], &list[i],
534 offsetof(struct drm_buf_pub, address))
535 || __get_user(addr, &list[i].address)
536 || __put_user((unsigned long)addr,
537 &list32[i].address))
538 return -EFAULT;
539
540 if (__put_user(actual, &argp->count)
541 || __get_user(addr, &request->virtual)
542 || __put_user((unsigned long)addr, &argp->virtual))
543 return -EFAULT;
544
545 return 0;
546}
547
548typedef struct drm_buf_free32 {
549 int count;
550 u32 list;
551} drm_buf_free32_t;
552
553static int compat_drm_freebufs(struct file *file, unsigned int cmd,
554 unsigned long arg)
555{
556 drm_buf_free32_t req32;
557 struct drm_buf_free __user *request;
558 drm_buf_free32_t __user *argp = (void __user *)arg;
559
560 if (copy_from_user(&req32, argp, sizeof(req32)))
561 return -EFAULT;
562
563 request = compat_alloc_user_space(sizeof(*request));
564 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
565 return -EFAULT;
566 if (__put_user(req32.count, &request->count)
567 || __put_user((int __user *)(unsigned long)req32.list,
568 &request->list))
569 return -EFAULT;
570
571 return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
572}
573
574typedef struct drm_ctx_priv_map32 {
575 unsigned int ctx_id; /**< Context requesting private mapping */
576 u32 handle; /**< Handle of map */
577} drm_ctx_priv_map32_t;
578
579static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
580 unsigned long arg)
581{
582 drm_ctx_priv_map32_t req32;
583 struct drm_ctx_priv_map __user *request;
584 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
585
586 if (copy_from_user(&req32, argp, sizeof(req32)))
587 return -EFAULT;
588
589 request = compat_alloc_user_space(sizeof(*request));
590 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
591 return -EFAULT;
592 if (__put_user(req32.ctx_id, &request->ctx_id)
593 || __put_user((void *)(unsigned long)req32.handle,
594 &request->handle))
595 return -EFAULT;
596
597 return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
598}
599
600static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
601 unsigned long arg)
602{
603 struct drm_ctx_priv_map __user *request;
604 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
605 int err;
606 unsigned int ctx_id;
607 void *handle;
608
609 if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
610 || __get_user(ctx_id, &argp->ctx_id))
611 return -EFAULT;
612
613 request = compat_alloc_user_space(sizeof(*request));
614 if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
615 return -EFAULT;
616 if (__put_user(ctx_id, &request->ctx_id))
617 return -EFAULT;
618
619 err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
620 if (err)
621 return err;
622
623 if (__get_user(handle, &request->handle)
624 || __put_user((unsigned long)handle, &argp->handle))
625 return -EFAULT;
626
627 return 0;
628}
629
630typedef struct drm_ctx_res32 {
631 int count;
632 u32 contexts;
633} drm_ctx_res32_t;
634
635static int compat_drm_resctx(struct file *file, unsigned int cmd,
636 unsigned long arg)
637{
638 drm_ctx_res32_t __user *argp = (void __user *)arg;
639 drm_ctx_res32_t res32;
640 struct drm_ctx_res __user *res;
641 int err;
642
643 if (copy_from_user(&res32, argp, sizeof(res32)))
644 return -EFAULT;
645
646 res = compat_alloc_user_space(sizeof(*res));
647 if (!access_ok(VERIFY_WRITE, res, sizeof(*res)))
648 return -EFAULT;
649 if (__put_user(res32.count, &res->count)
650 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
651 &res->contexts))
652 return -EFAULT;
653
654 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
655 if (err)
656 return err;
657
658 if (__get_user(res32.count, &res->count)
659 || __put_user(res32.count, &argp->count))
660 return -EFAULT;
661
662 return 0;
663}
664
665typedef struct drm_dma32 {
666 int context; /**< Context handle */
667 int send_count; /**< Number of buffers to send */
668 u32 send_indices; /**< List of handles to buffers */
669 u32 send_sizes; /**< Lengths of data to send */
670 enum drm_dma_flags flags; /**< Flags */
671 int request_count; /**< Number of buffers requested */
672 int request_size; /**< Desired size for buffers */
673 u32 request_indices; /**< Buffer information */
674 u32 request_sizes;
675 int granted_count; /**< Number of buffers granted */
676} drm_dma32_t;
677
678static int compat_drm_dma(struct file *file, unsigned int cmd,
679 unsigned long arg)
680{
681 drm_dma32_t d32;
682 drm_dma32_t __user *argp = (void __user *)arg;
683 struct drm_dma __user *d;
684 int err;
685
686 if (copy_from_user(&d32, argp, sizeof(d32)))
687 return -EFAULT;
688
689 d = compat_alloc_user_space(sizeof(*d));
690 if (!access_ok(VERIFY_WRITE, d, sizeof(*d)))
691 return -EFAULT;
692
693 if (__put_user(d32.context, &d->context)
694 || __put_user(d32.send_count, &d->send_count)
695 || __put_user((int __user *)(unsigned long)d32.send_indices,
696 &d->send_indices)
697 || __put_user((int __user *)(unsigned long)d32.send_sizes,
698 &d->send_sizes)
699 || __put_user(d32.flags, &d->flags)
700 || __put_user(d32.request_count, &d->request_count)
701 || __put_user((int __user *)(unsigned long)d32.request_indices,
702 &d->request_indices)
703 || __put_user((int __user *)(unsigned long)d32.request_sizes,
704 &d->request_sizes))
705 return -EFAULT;
706
707 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
708 if (err)
709 return err;
710
711 if (__get_user(d32.request_size, &d->request_size)
712 || __get_user(d32.granted_count, &d->granted_count)
713 || __put_user(d32.request_size, &argp->request_size)
714 || __put_user(d32.granted_count, &argp->granted_count))
715 return -EFAULT;
716
717 return 0;
718}
719
720#if __OS_HAS_AGP
721typedef struct drm_agp_mode32 {
722 u32 mode; /**< AGP mode */
723} drm_agp_mode32_t;
724
725static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
726 unsigned long arg)
727{
728 drm_agp_mode32_t __user *argp = (void __user *)arg;
729 drm_agp_mode32_t m32;
730 struct drm_agp_mode __user *mode;
731
732 if (get_user(m32.mode, &argp->mode))
733 return -EFAULT;
734
735 mode = compat_alloc_user_space(sizeof(*mode));
736 if (put_user(m32.mode, &mode->mode))
737 return -EFAULT;
738
739 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
740}
741
742typedef struct drm_agp_info32 {
743 int agp_version_major;
744 int agp_version_minor;
745 u32 mode;
746 u32 aperture_base; /* physical address */
747 u32 aperture_size; /* bytes */
748 u32 memory_allowed; /* bytes */
749 u32 memory_used;
750
751 /* PCI information */
752 unsigned short id_vendor;
753 unsigned short id_device;
754} drm_agp_info32_t;
755
756static int compat_drm_agp_info(struct file *file, unsigned int cmd,
757 unsigned long arg)
758{
759 drm_agp_info32_t __user *argp = (void __user *)arg;
760 drm_agp_info32_t i32;
761 struct drm_agp_info __user *info;
762 int err;
763
764 info = compat_alloc_user_space(sizeof(*info));
765 if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
766 return -EFAULT;
767
768 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
769 if (err)
770 return err;
771
772 if (__get_user(i32.agp_version_major, &info->agp_version_major)
773 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
774 || __get_user(i32.mode, &info->mode)
775 || __get_user(i32.aperture_base, &info->aperture_base)
776 || __get_user(i32.aperture_size, &info->aperture_size)
777 || __get_user(i32.memory_allowed, &info->memory_allowed)
778 || __get_user(i32.memory_used, &info->memory_used)
779 || __get_user(i32.id_vendor, &info->id_vendor)
780 || __get_user(i32.id_device, &info->id_device))
781 return -EFAULT;
782
783 if (copy_to_user(argp, &i32, sizeof(i32)))
784 return -EFAULT;
785
786 return 0;
787}
788
789typedef struct drm_agp_buffer32 {
790 u32 size; /**< In bytes -- will round to page boundary */
791 u32 handle; /**< Used for binding / unbinding */
792 u32 type; /**< Type of memory to allocate */
793 u32 physical; /**< Physical used by i810 */
794} drm_agp_buffer32_t;
795
796static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
797 unsigned long arg)
798{
799 drm_agp_buffer32_t __user *argp = (void __user *)arg;
800 drm_agp_buffer32_t req32;
801 struct drm_agp_buffer __user *request;
802 int err;
803
804 if (copy_from_user(&req32, argp, sizeof(req32)))
805 return -EFAULT;
806
807 request = compat_alloc_user_space(sizeof(*request));
808 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
809 || __put_user(req32.size, &request->size)
810 || __put_user(req32.type, &request->type))
811 return -EFAULT;
812
813 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
814 if (err)
815 return err;
816
817 if (__get_user(req32.handle, &request->handle)
818 || __get_user(req32.physical, &request->physical)
819 || copy_to_user(argp, &req32, sizeof(req32))) {
820 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
821 return -EFAULT;
822 }
823
824 return 0;
825}
826
827static int compat_drm_agp_free(struct file *file, unsigned int cmd,
828 unsigned long arg)
829{
830 drm_agp_buffer32_t __user *argp = (void __user *)arg;
831 struct drm_agp_buffer __user *request;
832 u32 handle;
833
834 request = compat_alloc_user_space(sizeof(*request));
835 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
836 || get_user(handle, &argp->handle)
837 || __put_user(handle, &request->handle))
838 return -EFAULT;
839
840 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
841}
842
843typedef struct drm_agp_binding32 {
844 u32 handle; /**< From drm_agp_buffer */
845 u32 offset; /**< In bytes -- will round to page boundary */
846} drm_agp_binding32_t;
847
848static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
849 unsigned long arg)
850{
851 drm_agp_binding32_t __user *argp = (void __user *)arg;
852 drm_agp_binding32_t req32;
853 struct drm_agp_binding __user *request;
854
855 if (copy_from_user(&req32, argp, sizeof(req32)))
856 return -EFAULT;
857
858 request = compat_alloc_user_space(sizeof(*request));
859 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
860 || __put_user(req32.handle, &request->handle)
861 || __put_user(req32.offset, &request->offset))
862 return -EFAULT;
863
864 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
865}
866
867static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
868 unsigned long arg)
869{
870 drm_agp_binding32_t __user *argp = (void __user *)arg;
871 struct drm_agp_binding __user *request;
872 u32 handle;
873
874 request = compat_alloc_user_space(sizeof(*request));
875 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
876 || get_user(handle, &argp->handle)
877 || __put_user(handle, &request->handle))
878 return -EFAULT;
879
880 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
881}
882#endif /* __OS_HAS_AGP */
883
884typedef struct drm_scatter_gather32 {
885 u32 size; /**< In bytes -- will round to page boundary */
886 u32 handle; /**< Used for mapping / unmapping */
887} drm_scatter_gather32_t;
888
889static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
890 unsigned long arg)
891{
892 drm_scatter_gather32_t __user *argp = (void __user *)arg;
893 struct drm_scatter_gather __user *request;
894 int err;
895 unsigned long x;
896
897 request = compat_alloc_user_space(sizeof(*request));
898 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
899 || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
900 || __get_user(x, &argp->size)
901 || __put_user(x, &request->size))
902 return -EFAULT;
903
904 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
905 if (err)
906 return err;
907
908 /* XXX not sure about the handle conversion here... */
909 if (__get_user(x, &request->handle)
910 || __put_user(x >> PAGE_SHIFT, &argp->handle))
911 return -EFAULT;
912
913 return 0;
914}
915
916static int compat_drm_sg_free(struct file *file, unsigned int cmd,
917 unsigned long arg)
918{
919 drm_scatter_gather32_t __user *argp = (void __user *)arg;
920 struct drm_scatter_gather __user *request;
921 unsigned long x;
922
923 request = compat_alloc_user_space(sizeof(*request));
924 if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
925 || !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)
934typedef 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
942static 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 (!access_ok(VERIFY_WRITE, request, sizeof(*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
965struct drm_wait_vblank_request32 {
966 enum drm_vblank_seq_type type;
967 unsigned int sequence;
968 u32 signal;
969};
970
971struct 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
978typedef union drm_wait_vblank32 {
979 struct drm_wait_vblank_request32 request;
980 struct drm_wait_vblank_reply32 reply;
981} drm_wait_vblank32_t;
982
983static 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 (!access_ok(VERIFY_WRITE, request, sizeof(*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
1017drm_ioctl_compat_t *drm_compat_ioctls[] = {
1018 [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1019 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1020 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1021 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1022 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1023 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1024 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1025 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1026 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1027 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1028 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1029 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1030 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1031 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1032 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1033 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1034 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1035#if __OS_HAS_AGP
1036 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1037 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1038 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1039 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1040 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1041 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1042#endif
1043 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1044 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1045#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1046 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1047#endif
1048 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1049};
1050
1051/**
1052 * Called whenever a 32-bit process running under a 64-bit kernel
1053 * performs an ioctl on /dev/drm.
1054 *
1055 * \param file_priv DRM file private.
1056 * \param cmd command.
1057 * \param arg user argument.
1058 * \return zero on success or negative number on failure.
1059 */
1060long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1061{
1062 unsigned int nr = DRM_IOCTL_NR(cmd);
1063 drm_ioctl_compat_t *fn;
1064 int ret;
1065
1066 /* Assume that ioctls without an explicit compat routine will just
1067 * work. This may not always be a good assumption, but it's better
1068 * than always failing.
1069 */
1070 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1071 return drm_ioctl(filp, cmd, arg);
1072
1073 fn = drm_compat_ioctls[nr];
1074
1075 if (fn != NULL)
1076 ret = (*fn) (filp, cmd, arg);
1077 else
1078 ret = drm_ioctl(filp, cmd, arg);
1079
1080 return ret;
1081}
1082
1083EXPORT_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);