Root/drivers/gpu/drm/drm_ioc32.c

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 "drmP.h"
35#include "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
73typedef struct drm_version_32 {
74    int version_major; /**< Major version */
75    int version_minor; /**< Minor version */
76    int version_patchlevel; /**< Patch level */
77    u32 name_len; /**< Length of name buffer */
78    u32 name; /**< Name of driver */
79    u32 date_len; /**< Length of date buffer */
80    u32 date; /**< User-space buffer to hold date */
81    u32 desc_len; /**< Length of desc buffer */
82    u32 desc; /**< User-space buffer to hold desc */
83} drm_version32_t;
84
85static int compat_drm_version(struct file *file, unsigned int cmd,
86                  unsigned long arg)
87{
88    drm_version32_t v32;
89    struct drm_version __user *version;
90    int err;
91
92    if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
93        return -EFAULT;
94
95    version = compat_alloc_user_space(sizeof(*version));
96    if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
97        return -EFAULT;
98    if (__put_user(v32.name_len, &version->name_len)
99        || __put_user((void __user *)(unsigned long)v32.name,
100              &version->name)
101        || __put_user(v32.date_len, &version->date_len)
102        || __put_user((void __user *)(unsigned long)v32.date,
103              &version->date)
104        || __put_user(v32.desc_len, &version->desc_len)
105        || __put_user((void __user *)(unsigned long)v32.desc,
106              &version->desc))
107        return -EFAULT;
108
109    err = drm_ioctl(file,
110            DRM_IOCTL_VERSION, (unsigned long)version);
111    if (err)
112        return err;
113
114    if (__get_user(v32.version_major, &version->version_major)
115        || __get_user(v32.version_minor, &version->version_minor)
116        || __get_user(v32.version_patchlevel, &version->version_patchlevel)
117        || __get_user(v32.name_len, &version->name_len)
118        || __get_user(v32.date_len, &version->date_len)
119        || __get_user(v32.desc_len, &version->desc_len))
120        return -EFAULT;
121
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 __user *u;
137    int err;
138
139    if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
140        return -EFAULT;
141
142    u = compat_alloc_user_space(sizeof(*u));
143    if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
144        return -EFAULT;
145    if (__put_user(uq32.unique_len, &u->unique_len)
146        || __put_user((void __user *)(unsigned long)uq32.unique,
147              &u->unique))
148        return -EFAULT;
149
150    err = drm_ioctl(file, DRM_IOCTL_GET_UNIQUE, (unsigned long)u);
151    if (err)
152        return err;
153
154    if (__get_user(uq32.unique_len, &u->unique_len))
155        return -EFAULT;
156    if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
157        return -EFAULT;
158    return 0;
159}
160
161static int compat_drm_setunique(struct file *file, unsigned int cmd,
162                unsigned long arg)
163{
164    drm_unique32_t uq32;
165    struct drm_unique __user *u;
166
167    if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
168        return -EFAULT;
169
170    u = compat_alloc_user_space(sizeof(*u));
171    if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
172        return -EFAULT;
173    if (__put_user(uq32.unique_len, &u->unique_len)
174        || __put_user((void __user *)(unsigned long)uq32.unique,
175              &u->unique))
176        return -EFAULT;
177
178    return drm_ioctl(file, DRM_IOCTL_SET_UNIQUE, (unsigned long)u);
179}
180
181typedef struct drm_map32 {
182    u32 offset; /**< Requested physical address (0 for SAREA)*/
183    u32 size; /**< Requested physical size (bytes) */
184    enum drm_map_type type; /**< Type of memory to map */
185    enum drm_map_flags flags; /**< Flags */
186    u32 handle; /**< User-space: "Handle" to pass to mmap() */
187    int mtrr; /**< MTRR slot used */
188} drm_map32_t;
189
190static int compat_drm_getmap(struct file *file, unsigned int cmd,
191                 unsigned long arg)
192{
193    drm_map32_t __user *argp = (void __user *)arg;
194    drm_map32_t m32;
195    struct drm_map __user *map;
196    int idx, err;
197    void *handle;
198
199    if (get_user(idx, &argp->offset))
200        return -EFAULT;
201
202    map = compat_alloc_user_space(sizeof(*map));
203    if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
204        return -EFAULT;
205    if (__put_user(idx, &map->offset))
206        return -EFAULT;
207
208    err = drm_ioctl(file, DRM_IOCTL_GET_MAP, (unsigned long)map);
209    if (err)
210        return err;
211
212    if (__get_user(m32.offset, &map->offset)
213        || __get_user(m32.size, &map->size)
214        || __get_user(m32.type, &map->type)
215        || __get_user(m32.flags, &map->flags)
216        || __get_user(handle, &map->handle)
217        || __get_user(m32.mtrr, &map->mtrr))
218        return -EFAULT;
219
220    m32.handle = (unsigned long)handle;
221    if (copy_to_user(argp, &m32, sizeof(m32)))
222        return -EFAULT;
223    return 0;
224
225}
226
227static int compat_drm_addmap(struct file *file, unsigned int cmd,
228                 unsigned long arg)
229{
230    drm_map32_t __user *argp = (void __user *)arg;
231    drm_map32_t m32;
232    struct drm_map __user *map;
233    int err;
234    void *handle;
235
236    if (copy_from_user(&m32, argp, sizeof(m32)))
237        return -EFAULT;
238
239    map = compat_alloc_user_space(sizeof(*map));
240    if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
241        return -EFAULT;
242    if (__put_user(m32.offset, &map->offset)
243        || __put_user(m32.size, &map->size)
244        || __put_user(m32.type, &map->type)
245        || __put_user(m32.flags, &map->flags))
246        return -EFAULT;
247
248    err = drm_ioctl(file, DRM_IOCTL_ADD_MAP, (unsigned long)map);
249    if (err)
250        return err;
251
252    if (__get_user(m32.offset, &map->offset)
253        || __get_user(m32.mtrr, &map->mtrr)
254        || __get_user(handle, &map->handle))
255        return -EFAULT;
256
257    m32.handle = (unsigned long)handle;
258    if (m32.handle != (unsigned long)handle)
259        printk_ratelimited(KERN_ERR "compat_drm_addmap truncated handle"
260                   " %p for type %d offset %x\n",
261                   handle, m32.type, m32.offset);
262
263    if (copy_to_user(argp, &m32, sizeof(m32)))
264        return -EFAULT;
265
266    return 0;
267}
268
269static int compat_drm_rmmap(struct file *file, unsigned int cmd,
270                unsigned long arg)
271{
272    drm_map32_t __user *argp = (void __user *)arg;
273    struct drm_map __user *map;
274    u32 handle;
275
276    if (get_user(handle, &argp->handle))
277        return -EFAULT;
278
279    map = compat_alloc_user_space(sizeof(*map));
280    if (!access_ok(VERIFY_WRITE, map, sizeof(*map)))
281        return -EFAULT;
282    if (__put_user((void *)(unsigned long)handle, &map->handle))
283        return -EFAULT;
284
285    return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
286}
287
288typedef struct drm_client32 {
289    int idx; /**< Which client desired? */
290    int auth; /**< Is client authenticated? */
291    u32 pid; /**< Process ID */
292    u32 uid; /**< User ID */
293    u32 magic; /**< Magic */
294    u32 iocs; /**< Ioctl count */
295} drm_client32_t;
296
297static int compat_drm_getclient(struct file *file, unsigned int cmd,
298                unsigned long arg)
299{
300    drm_client32_t c32;
301    drm_client32_t __user *argp = (void __user *)arg;
302    struct drm_client __user *client;
303    int idx, err;
304
305    if (get_user(idx, &argp->idx))
306        return -EFAULT;
307
308    client = compat_alloc_user_space(sizeof(*client));
309    if (!access_ok(VERIFY_WRITE, client, sizeof(*client)))
310        return -EFAULT;
311    if (__put_user(idx, &client->idx))
312        return -EFAULT;
313
314    err = drm_ioctl(file, DRM_IOCTL_GET_CLIENT, (unsigned long)client);
315    if (err)
316        return err;
317
318    if (__get_user(c32.idx, &client->idx)
319        || __get_user(c32.auth, &client->auth)
320        || __get_user(c32.pid, &client->pid)
321        || __get_user(c32.uid, &client->uid)
322        || __get_user(c32.magic, &client->magic)
323        || __get_user(c32.iocs, &client->iocs))
324        return -EFAULT;
325
326    if (copy_to_user(argp, &c32, sizeof(c32)))
327        return -EFAULT;
328    return 0;
329}
330
331typedef struct drm_stats32 {
332    u32 count;
333    struct {
334        u32 value;
335        enum drm_stat_type type;
336    } data[15];
337} drm_stats32_t;
338
339static int compat_drm_getstats(struct file *file, unsigned int cmd,
340                   unsigned long arg)
341{
342    drm_stats32_t s32;
343    drm_stats32_t __user *argp = (void __user *)arg;
344    struct drm_stats __user *stats;
345    int i, err;
346
347    stats = compat_alloc_user_space(sizeof(*stats));
348    if (!access_ok(VERIFY_WRITE, stats, sizeof(*stats)))
349        return -EFAULT;
350
351    err = drm_ioctl(file, DRM_IOCTL_GET_STATS, (unsigned long)stats);
352    if (err)
353        return err;
354
355    if (__get_user(s32.count, &stats->count))
356        return -EFAULT;
357    for (i = 0; i < 15; ++i)
358        if (__get_user(s32.data[i].value, &stats->data[i].value)
359            || __get_user(s32.data[i].type, &stats->data[i].type))
360            return -EFAULT;
361
362    if (copy_to_user(argp, &s32, sizeof(s32)))
363        return -EFAULT;
364    return 0;
365}
366
367typedef struct drm_buf_desc32 {
368    int count; /**< Number of buffers of this size */
369    int size; /**< Size in bytes */
370    int low_mark; /**< Low water mark */
371    int high_mark; /**< High water mark */
372    int flags;
373    u32 agp_start; /**< Start address in the AGP aperture */
374} drm_buf_desc32_t;
375
376static int compat_drm_addbufs(struct file *file, unsigned int cmd,
377                  unsigned long arg)
378{
379    drm_buf_desc32_t __user *argp = (void __user *)arg;
380    struct drm_buf_desc __user *buf;
381    int err;
382    unsigned long agp_start;
383
384    buf = compat_alloc_user_space(sizeof(*buf));
385    if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf))
386        || !access_ok(VERIFY_WRITE, argp, sizeof(*argp)))
387        return -EFAULT;
388
389    if (__copy_in_user(buf, argp, offsetof(drm_buf_desc32_t, agp_start))
390        || __get_user(agp_start, &argp->agp_start)
391        || __put_user(agp_start, &buf->agp_start))
392        return -EFAULT;
393
394    err = drm_ioctl(file, DRM_IOCTL_ADD_BUFS, (unsigned long)buf);
395    if (err)
396        return err;
397
398    if (__copy_in_user(argp, buf, offsetof(drm_buf_desc32_t, agp_start))
399        || __get_user(agp_start, &buf->agp_start)
400        || __put_user(agp_start, &argp->agp_start))
401        return -EFAULT;
402
403    return 0;
404}
405
406static int compat_drm_markbufs(struct file *file, unsigned int cmd,
407                   unsigned long arg)
408{
409    drm_buf_desc32_t b32;
410    drm_buf_desc32_t __user *argp = (void __user *)arg;
411    struct drm_buf_desc __user *buf;
412
413    if (copy_from_user(&b32, argp, sizeof(b32)))
414        return -EFAULT;
415
416    buf = compat_alloc_user_space(sizeof(*buf));
417    if (!access_ok(VERIFY_WRITE, buf, sizeof(*buf)))
418        return -EFAULT;
419
420    if (__put_user(b32.size, &buf->size)
421        || __put_user(b32.low_mark, &buf->low_mark)
422        || __put_user(b32.high_mark, &buf->high_mark))
423        return -EFAULT;
424
425    return drm_ioctl(file, DRM_IOCTL_MARK_BUFS, (unsigned long)buf);
426}
427
428typedef struct drm_buf_info32 {
429    int count; /**< Entries in list */
430    u32 list;
431} drm_buf_info32_t;
432
433static int compat_drm_infobufs(struct file *file, unsigned int cmd,
434                   unsigned long arg)
435{
436    drm_buf_info32_t req32;
437    drm_buf_info32_t __user *argp = (void __user *)arg;
438    drm_buf_desc32_t __user *to;
439    struct drm_buf_info __user *request;
440    struct drm_buf_desc __user *list;
441    size_t nbytes;
442    int i, err;
443    int count, actual;
444
445    if (copy_from_user(&req32, argp, sizeof(req32)))
446        return -EFAULT;
447
448    count = req32.count;
449    to = (drm_buf_desc32_t __user *) (unsigned long)req32.list;
450    if (count < 0)
451        count = 0;
452    if (count > 0
453        && !access_ok(VERIFY_WRITE, to, count * sizeof(drm_buf_desc32_t)))
454        return -EFAULT;
455
456    nbytes = sizeof(*request) + count * sizeof(struct drm_buf_desc);
457    request = compat_alloc_user_space(nbytes);
458    if (!access_ok(VERIFY_WRITE, request, nbytes))
459        return -EFAULT;
460    list = (struct drm_buf_desc *) (request + 1);
461
462    if (__put_user(count, &request->count)
463        || __put_user(list, &request->list))
464        return -EFAULT;
465
466    err = drm_ioctl(file, DRM_IOCTL_INFO_BUFS, (unsigned long)request);
467    if (err)
468        return err;
469
470    if (__get_user(actual, &request->count))
471        return -EFAULT;
472    if (count >= actual)
473        for (i = 0; i < actual; ++i)
474            if (__copy_in_user(&to[i], &list[i],
475                       offsetof(struct drm_buf_desc, flags)))
476                return -EFAULT;
477
478    if (__put_user(actual, &argp->count))
479        return -EFAULT;
480
481    return 0;
482}
483
484typedef struct drm_buf_pub32 {
485    int idx; /**< Index into the master buffer list */
486    int total; /**< Buffer size */
487    int used; /**< Amount of buffer in use (for DMA) */
488    u32 address; /**< Address of buffer */
489} drm_buf_pub32_t;
490
491typedef struct drm_buf_map32 {
492    int count; /**< Length of the buffer list */
493    u32 virtual; /**< Mmap'd area in user-virtual */
494    u32 list; /**< Buffer information */
495} drm_buf_map32_t;
496
497static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
498                  unsigned long arg)
499{
500    drm_buf_map32_t __user *argp = (void __user *)arg;
501    drm_buf_map32_t req32;
502    drm_buf_pub32_t __user *list32;
503    struct drm_buf_map __user *request;
504    struct drm_buf_pub __user *list;
505    int i, err;
506    int count, actual;
507    size_t nbytes;
508    void __user *addr;
509
510    if (copy_from_user(&req32, argp, sizeof(req32)))
511        return -EFAULT;
512    count = req32.count;
513    list32 = (void __user *)(unsigned long)req32.list;
514
515    if (count < 0)
516        return -EINVAL;
517    nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
518    request = compat_alloc_user_space(nbytes);
519    if (!access_ok(VERIFY_WRITE, request, nbytes))
520        return -EFAULT;
521    list = (struct drm_buf_pub *) (request + 1);
522
523    if (__put_user(count, &request->count)
524        || __put_user(list, &request->list))
525        return -EFAULT;
526
527    err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
528    if (err)
529        return err;
530
531    if (__get_user(actual, &request->count))
532        return -EFAULT;
533    if (count >= actual)
534        for (i = 0; i < actual; ++i)
535            if (__copy_in_user(&list32[i], &list[i],
536                       offsetof(struct drm_buf_pub, address))
537                || __get_user(addr, &list[i].address)
538                || __put_user((unsigned long)addr,
539                      &list32[i].address))
540                return -EFAULT;
541
542    if (__put_user(actual, &argp->count)
543        || __get_user(addr, &request->virtual)
544        || __put_user((unsigned long)addr, &argp->virtual))
545        return -EFAULT;
546
547    return 0;
548}
549
550typedef struct drm_buf_free32 {
551    int count;
552    u32 list;
553} drm_buf_free32_t;
554
555static int compat_drm_freebufs(struct file *file, unsigned int cmd,
556                   unsigned long arg)
557{
558    drm_buf_free32_t req32;
559    struct drm_buf_free __user *request;
560    drm_buf_free32_t __user *argp = (void __user *)arg;
561
562    if (copy_from_user(&req32, argp, sizeof(req32)))
563        return -EFAULT;
564
565    request = compat_alloc_user_space(sizeof(*request));
566    if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
567        return -EFAULT;
568    if (__put_user(req32.count, &request->count)
569        || __put_user((int __user *)(unsigned long)req32.list,
570              &request->list))
571        return -EFAULT;
572
573    return drm_ioctl(file, DRM_IOCTL_FREE_BUFS, (unsigned long)request);
574}
575
576typedef struct drm_ctx_priv_map32 {
577    unsigned int ctx_id; /**< Context requesting private mapping */
578    u32 handle; /**< Handle of map */
579} drm_ctx_priv_map32_t;
580
581static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
582                  unsigned long arg)
583{
584    drm_ctx_priv_map32_t req32;
585    struct drm_ctx_priv_map __user *request;
586    drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
587
588    if (copy_from_user(&req32, argp, sizeof(req32)))
589        return -EFAULT;
590
591    request = compat_alloc_user_space(sizeof(*request));
592    if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
593        return -EFAULT;
594    if (__put_user(req32.ctx_id, &request->ctx_id)
595        || __put_user((void *)(unsigned long)req32.handle,
596              &request->handle))
597        return -EFAULT;
598
599    return drm_ioctl(file, DRM_IOCTL_SET_SAREA_CTX, (unsigned long)request);
600}
601
602static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
603                  unsigned long arg)
604{
605    struct drm_ctx_priv_map __user *request;
606    drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
607    int err;
608    unsigned int ctx_id;
609    void *handle;
610
611    if (!access_ok(VERIFY_WRITE, argp, sizeof(*argp))
612        || __get_user(ctx_id, &argp->ctx_id))
613        return -EFAULT;
614
615    request = compat_alloc_user_space(sizeof(*request));
616    if (!access_ok(VERIFY_WRITE, request, sizeof(*request)))
617        return -EFAULT;
618    if (__put_user(ctx_id, &request->ctx_id))
619        return -EFAULT;
620
621    err = drm_ioctl(file, DRM_IOCTL_GET_SAREA_CTX, (unsigned long)request);
622    if (err)
623        return err;
624
625    if (__get_user(handle, &request->handle)
626        || __put_user((unsigned long)handle, &argp->handle))
627        return -EFAULT;
628
629    return 0;
630}
631
632typedef struct drm_ctx_res32 {
633    int count;
634    u32 contexts;
635} drm_ctx_res32_t;
636
637static int compat_drm_resctx(struct file *file, unsigned int cmd,
638                 unsigned long arg)
639{
640    drm_ctx_res32_t __user *argp = (void __user *)arg;
641    drm_ctx_res32_t res32;
642    struct drm_ctx_res __user *res;
643    int err;
644
645    if (copy_from_user(&res32, argp, sizeof(res32)))
646        return -EFAULT;
647
648    res = compat_alloc_user_space(sizeof(*res));
649    if (!access_ok(VERIFY_WRITE, res, sizeof(*res)))
650        return -EFAULT;
651    if (__put_user(res32.count, &res->count)
652        || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
653              &res->contexts))
654        return -EFAULT;
655
656    err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
657    if (err)
658        return err;
659
660    if (__get_user(res32.count, &res->count)
661        || __put_user(res32.count, &argp->count))
662        return -EFAULT;
663
664    return 0;
665}
666
667typedef struct drm_dma32 {
668    int context; /**< Context handle */
669    int send_count; /**< Number of buffers to send */
670    u32 send_indices; /**< List of handles to buffers */
671    u32 send_sizes; /**< Lengths of data to send */
672    enum drm_dma_flags flags; /**< Flags */
673    int request_count; /**< Number of buffers requested */
674    int request_size; /**< Desired size for buffers */
675    u32 request_indices; /**< Buffer information */
676    u32 request_sizes;
677    int granted_count; /**< Number of buffers granted */
678} drm_dma32_t;
679
680static int compat_drm_dma(struct file *file, unsigned int cmd,
681              unsigned long arg)
682{
683    drm_dma32_t d32;
684    drm_dma32_t __user *argp = (void __user *)arg;
685    struct drm_dma __user *d;
686    int err;
687
688    if (copy_from_user(&d32, argp, sizeof(d32)))
689        return -EFAULT;
690
691    d = compat_alloc_user_space(sizeof(*d));
692    if (!access_ok(VERIFY_WRITE, d, sizeof(*d)))
693        return -EFAULT;
694
695    if (__put_user(d32.context, &d->context)
696        || __put_user(d32.send_count, &d->send_count)
697        || __put_user((int __user *)(unsigned long)d32.send_indices,
698              &d->send_indices)
699        || __put_user((int __user *)(unsigned long)d32.send_sizes,
700              &d->send_sizes)
701        || __put_user(d32.flags, &d->flags)
702        || __put_user(d32.request_count, &d->request_count)
703        || __put_user((int __user *)(unsigned long)d32.request_indices,
704              &d->request_indices)
705        || __put_user((int __user *)(unsigned long)d32.request_sizes,
706              &d->request_sizes))
707        return -EFAULT;
708
709    err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
710    if (err)
711        return err;
712
713    if (__get_user(d32.request_size, &d->request_size)
714        || __get_user(d32.granted_count, &d->granted_count)
715        || __put_user(d32.request_size, &argp->request_size)
716        || __put_user(d32.granted_count, &argp->granted_count))
717        return -EFAULT;
718
719    return 0;
720}
721
722#if __OS_HAS_AGP
723typedef struct drm_agp_mode32 {
724    u32 mode; /**< AGP mode */
725} drm_agp_mode32_t;
726
727static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
728                 unsigned long arg)
729{
730    drm_agp_mode32_t __user *argp = (void __user *)arg;
731    drm_agp_mode32_t m32;
732    struct drm_agp_mode __user *mode;
733
734    if (get_user(m32.mode, &argp->mode))
735        return -EFAULT;
736
737    mode = compat_alloc_user_space(sizeof(*mode));
738    if (put_user(m32.mode, &mode->mode))
739        return -EFAULT;
740
741    return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
742}
743
744typedef struct drm_agp_info32 {
745    int agp_version_major;
746    int agp_version_minor;
747    u32 mode;
748    u32 aperture_base; /* physical address */
749    u32 aperture_size; /* bytes */
750    u32 memory_allowed; /* bytes */
751    u32 memory_used;
752
753    /* PCI information */
754    unsigned short id_vendor;
755    unsigned short id_device;
756} drm_agp_info32_t;
757
758static int compat_drm_agp_info(struct file *file, unsigned int cmd,
759                   unsigned long arg)
760{
761    drm_agp_info32_t __user *argp = (void __user *)arg;
762    drm_agp_info32_t i32;
763    struct drm_agp_info __user *info;
764    int err;
765
766    info = compat_alloc_user_space(sizeof(*info));
767    if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
768        return -EFAULT;
769
770    err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
771    if (err)
772        return err;
773
774    if (__get_user(i32.agp_version_major, &info->agp_version_major)
775        || __get_user(i32.agp_version_minor, &info->agp_version_minor)
776        || __get_user(i32.mode, &info->mode)
777        || __get_user(i32.aperture_base, &info->aperture_base)
778        || __get_user(i32.aperture_size, &info->aperture_size)
779        || __get_user(i32.memory_allowed, &info->memory_allowed)
780        || __get_user(i32.memory_used, &info->memory_used)
781        || __get_user(i32.id_vendor, &info->id_vendor)
782        || __get_user(i32.id_device, &info->id_device))
783        return -EFAULT;
784
785    if (copy_to_user(argp, &i32, sizeof(i32)))
786        return -EFAULT;
787
788    return 0;
789}
790
791typedef struct drm_agp_buffer32 {
792    u32 size; /**< In bytes -- will round to page boundary */
793    u32 handle; /**< Used for binding / unbinding */
794    u32 type; /**< Type of memory to allocate */
795    u32 physical; /**< Physical used by i810 */
796} drm_agp_buffer32_t;
797
798static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
799                unsigned long arg)
800{
801    drm_agp_buffer32_t __user *argp = (void __user *)arg;
802    drm_agp_buffer32_t req32;
803    struct drm_agp_buffer __user *request;
804    int err;
805
806    if (copy_from_user(&req32, argp, sizeof(req32)))
807        return -EFAULT;
808
809    request = compat_alloc_user_space(sizeof(*request));
810    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
811        || __put_user(req32.size, &request->size)
812        || __put_user(req32.type, &request->type))
813        return -EFAULT;
814
815    err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
816    if (err)
817        return err;
818
819    if (__get_user(req32.handle, &request->handle)
820        || __get_user(req32.physical, &request->physical)
821        || copy_to_user(argp, &req32, sizeof(req32))) {
822        drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
823        return -EFAULT;
824    }
825
826    return 0;
827}
828
829static int compat_drm_agp_free(struct file *file, unsigned int cmd,
830                   unsigned long arg)
831{
832    drm_agp_buffer32_t __user *argp = (void __user *)arg;
833    struct drm_agp_buffer __user *request;
834    u32 handle;
835
836    request = compat_alloc_user_space(sizeof(*request));
837    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
838        || get_user(handle, &argp->handle)
839        || __put_user(handle, &request->handle))
840        return -EFAULT;
841
842    return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
843}
844
845typedef struct drm_agp_binding32 {
846    u32 handle; /**< From drm_agp_buffer */
847    u32 offset; /**< In bytes -- will round to page boundary */
848} drm_agp_binding32_t;
849
850static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
851                   unsigned long arg)
852{
853    drm_agp_binding32_t __user *argp = (void __user *)arg;
854    drm_agp_binding32_t req32;
855    struct drm_agp_binding __user *request;
856
857    if (copy_from_user(&req32, argp, sizeof(req32)))
858        return -EFAULT;
859
860    request = compat_alloc_user_space(sizeof(*request));
861    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
862        || __put_user(req32.handle, &request->handle)
863        || __put_user(req32.offset, &request->offset))
864        return -EFAULT;
865
866    return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
867}
868
869static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
870                 unsigned long arg)
871{
872    drm_agp_binding32_t __user *argp = (void __user *)arg;
873    struct drm_agp_binding __user *request;
874    u32 handle;
875
876    request = compat_alloc_user_space(sizeof(*request));
877    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
878        || get_user(handle, &argp->handle)
879        || __put_user(handle, &request->handle))
880        return -EFAULT;
881
882    return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
883}
884#endif /* __OS_HAS_AGP */
885
886typedef struct drm_scatter_gather32 {
887    u32 size; /**< In bytes -- will round to page boundary */
888    u32 handle; /**< Used for mapping / unmapping */
889} drm_scatter_gather32_t;
890
891static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
892                   unsigned long arg)
893{
894    drm_scatter_gather32_t __user *argp = (void __user *)arg;
895    struct drm_scatter_gather __user *request;
896    int err;
897    unsigned long x;
898
899    request = compat_alloc_user_space(sizeof(*request));
900    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
901        || !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 (!access_ok(VERIFY_WRITE, request, sizeof(*request))
927        || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
928        || __get_user(x, &argp->handle)
929        || __put_user(x << PAGE_SHIFT, &request->handle))
930        return -EFAULT;
931
932    return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
933}
934
935#if defined(CONFIG_X86) || defined(CONFIG_IA64)
936typedef struct drm_update_draw32 {
937    drm_drawable_t handle;
938    unsigned int type;
939    unsigned int num;
940    /* 64-bit version has a 32-bit pad here */
941    u64 data; /**< Pointer */
942} __attribute__((packed)) drm_update_draw32_t;
943
944static int compat_drm_update_draw(struct file *file, unsigned int cmd,
945                  unsigned long arg)
946{
947    drm_update_draw32_t update32;
948    struct drm_update_draw __user *request;
949    int err;
950
951    if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
952        return -EFAULT;
953
954    request = compat_alloc_user_space(sizeof(*request));
955    if (!access_ok(VERIFY_WRITE, request, sizeof(*request)) ||
956        __put_user(update32.handle, &request->handle) ||
957        __put_user(update32.type, &request->type) ||
958        __put_user(update32.num, &request->num) ||
959        __put_user(update32.data, &request->data))
960        return -EFAULT;
961
962    err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
963    return err;
964}
965#endif
966
967struct drm_wait_vblank_request32 {
968    enum drm_vblank_seq_type type;
969    unsigned int sequence;
970    u32 signal;
971};
972
973struct drm_wait_vblank_reply32 {
974    enum drm_vblank_seq_type type;
975    unsigned int sequence;
976    s32 tval_sec;
977    s32 tval_usec;
978};
979
980typedef union drm_wait_vblank32 {
981    struct drm_wait_vblank_request32 request;
982    struct drm_wait_vblank_reply32 reply;
983} drm_wait_vblank32_t;
984
985static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
986                  unsigned long arg)
987{
988    drm_wait_vblank32_t __user *argp = (void __user *)arg;
989    drm_wait_vblank32_t req32;
990    union drm_wait_vblank __user *request;
991    int err;
992
993    if (copy_from_user(&req32, argp, sizeof(req32)))
994        return -EFAULT;
995
996    request = compat_alloc_user_space(sizeof(*request));
997    if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
998        || __put_user(req32.request.type, &request->request.type)
999        || __put_user(req32.request.sequence, &request->request.sequence)
1000        || __put_user(req32.request.signal, &request->request.signal))
1001        return -EFAULT;
1002
1003    err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
1004    if (err)
1005        return err;
1006
1007    if (__get_user(req32.reply.type, &request->reply.type)
1008        || __get_user(req32.reply.sequence, &request->reply.sequence)
1009        || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
1010        || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
1011        return -EFAULT;
1012
1013    if (copy_to_user(argp, &req32, sizeof(req32)))
1014        return -EFAULT;
1015
1016    return 0;
1017}
1018
1019drm_ioctl_compat_t *drm_compat_ioctls[] = {
1020    [DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
1021    [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
1022    [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)] = compat_drm_getmap,
1023    [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)] = compat_drm_getclient,
1024    [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS32)] = compat_drm_getstats,
1025    [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE32)] = compat_drm_setunique,
1026    [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP32)] = compat_drm_addmap,
1027    [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS32)] = compat_drm_addbufs,
1028    [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS32)] = compat_drm_markbufs,
1029    [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS32)] = compat_drm_infobufs,
1030    [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)] = compat_drm_mapbufs,
1031    [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS32)] = compat_drm_freebufs,
1032    [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)] = compat_drm_rmmap,
1033    [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX32)] = compat_drm_setsareactx,
1034    [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
1035    [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
1036    [DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
1037#if __OS_HAS_AGP
1038    [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
1039    [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
1040    [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
1041    [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)] = compat_drm_agp_free,
1042    [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)] = compat_drm_agp_bind,
1043    [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)] = compat_drm_agp_unbind,
1044#endif
1045    [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)] = compat_drm_sg_alloc,
1046    [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)] = compat_drm_sg_free,
1047#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1048    [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
1049#endif
1050    [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
1051};
1052
1053/**
1054 * Called whenever a 32-bit process running under a 64-bit kernel
1055 * performs an ioctl on /dev/drm.
1056 *
1057 * \param file_priv DRM file private.
1058 * \param cmd command.
1059 * \param arg user argument.
1060 * \return zero on success or negative number on failure.
1061 */
1062long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1063{
1064    unsigned int nr = DRM_IOCTL_NR(cmd);
1065    drm_ioctl_compat_t *fn;
1066    int ret;
1067
1068    /* Assume that ioctls without an explicit compat routine will just
1069     * work. This may not always be a good assumption, but it's better
1070     * than always failing.
1071     */
1072    if (nr >= ARRAY_SIZE(drm_compat_ioctls))
1073        return drm_ioctl(filp, cmd, arg);
1074
1075    fn = drm_compat_ioctls[nr];
1076
1077    if (fn != NULL)
1078        ret = (*fn) (filp, cmd, arg);
1079    else
1080        ret = drm_ioctl(filp, cmd, arg);
1081
1082    return ret;
1083}
1084
1085EXPORT_SYMBOL(drm_compat_ioctl);
1086

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