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switch compat_drm_getsareactx() to drm_ioctl_kernel()
[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / drm_ioc32.c
CommitLineData
2640981f 1/*
9a186645
DA		 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>
cafe8d84 31#include <linux/ratelimit.h>
2d1a8a48 32#include <linux/export.h>
9a186645 33
760285e7 34#include <drm/drmP.h>
ff22ff9e 35#include "drm_legacy.h"
012c6741 36#include "drm_internal.h"
9a186645
DA		 37
38#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
39#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
40#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
41#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
42#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
43
44#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
45#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
46#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
47#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
48#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
49#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
50#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
51
52#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
53
54#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
55#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
56
57#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
58#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
59
60#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
61#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
62#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
63#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
64#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
65#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
66
67#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
68#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
69
49568873
EA		 70#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
71
9a186645
DA		 72#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
73
c631d5f9
TU		 74#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
75
9a186645 76typedef struct drm_version_32 {
2640981f
DV		 77 int version_major; /* Major version */
78 int version_minor; /* Minor version */
79 int version_patchlevel; /* Patch level */
80 u32 name_len; /* Length of name buffer */
81 u32 name; /* Name of driver */
82 u32 date_len; /* Length of date buffer */
83 u32 date; /* User-space buffer to hold date */
84 u32 desc_len; /* Length of desc buffer */
85 u32 desc; /* User-space buffer to hold desc */
9a186645
DA		 86} drm_version32_t;
87
88static int compat_drm_version(struct file *file, unsigned int cmd,
89 unsigned long arg)
90{
91 drm_version32_t v32;
012c6741 92 struct drm_version v;
9a186645
DA		 93 int err;
94
b5e89ed5 95 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
9a186645
DA		 96 return -EFAULT;
97
012c6741
AV		 98 v = (struct drm_version) {
99 .name_len = v32.name_len,
100 .name = compat_ptr(v32.name),
101 .date_len = v32.date_len,
102 .date = compat_ptr(v32.date),
103 .desc_len = v32.desc_len,
104 .desc = compat_ptr(v32.desc),
105 };
106 err = drm_ioctl_kernel(file, drm_version, &v,
107 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
9a186645
DA		 108 if (err)
109 return err;
110
012c6741
AV		 111 v32.version_major = v.version_major;
112 v32.version_minor = v.version_minor;
113 v32.version_patchlevel = v.version_patchlevel;
b5e89ed5 114 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
9a186645
DA		 115 return -EFAULT;
116 return 0;
117}
118
119typedef struct drm_unique32 {
2640981f
DV		 120 u32 unique_len; /* Length of unique */
121 u32 unique; /* Unique name for driver instantiation */
9a186645
DA		 122} drm_unique32_t;
123
124static int compat_drm_getunique(struct file *file, unsigned int cmd,
125 unsigned long arg)
126{
127 drm_unique32_t uq32;
17e3dade 128 struct drm_unique uq;
9a186645
DA		 129 int err;
130
b5e89ed5 131 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
9a186645 132 return -EFAULT;
17e3dade
AV		 133 uq = (struct drm_unique){
134 .unique_len = uq32.unique_len,
135 .unique = compat_ptr(uq32.unique),
136 };
9a186645 137
17e3dade 138 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
9a186645
DA		 139 if (err)
140 return err;
141
17e3dade 142 uq32.unique_len = uq.unique_len;
b5e89ed5 143 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
9a186645
DA		 144 return -EFAULT;
145 return 0;
146}
147
148static int compat_drm_setunique(struct file *file, unsigned int cmd,
149 unsigned long arg)
150{
56c275cc
AV		 151 /* it's dead */
152 return -EINVAL;
9a186645
DA		 153}
154
155typedef struct drm_map32 {
2640981f
DV		 156 u32 offset; /* Requested physical address (0 for SAREA) */
157 u32 size; /* Requested physical size (bytes) */
158 enum drm_map_type type; /* Type of memory to map */
159 enum drm_map_flags flags; /* Flags */
160 u32 handle; /* User-space: "Handle" to pass to mmap() */
161 int mtrr; /* MTRR slot used */
9a186645
DA		 162} drm_map32_t;
163
164static int compat_drm_getmap(struct file *file, unsigned int cmd,
165 unsigned long arg)
166{
167 drm_map32_t __user *argp = (void __user *)arg;
168 drm_map32_t m32;
8c4fe499
AV		 169 struct drm_map map;
170 int err;
9a186645 171
8c4fe499 172 if (copy_from_user(&m32, argp, sizeof(m32)))
9a186645
DA		 173 return -EFAULT;
174
8c4fe499
AV		 175 map.offset = m32.offset;
176 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
9a186645
DA		 177 if (err)
178 return err;
179
8c4fe499
AV		 180 m32.offset = map.offset;
181 m32.size = map.size;
182 m32.type = map.type;
183 m32.flags = map.flags;
184 m32.handle = ptr_to_compat(map.handle);
185 m32.mtrr = map.mtrr;
9a186645
DA		 186 if (copy_to_user(argp, &m32, sizeof(m32)))
187 return -EFAULT;
188 return 0;
189
190}
191
192static int compat_drm_addmap(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;
b36180a3 197 struct drm_map map;
9a186645 198 int err;
9a186645
DA		 199
200 if (copy_from_user(&m32, argp, sizeof(m32)))
201 return -EFAULT;
202
b36180a3
AV		 203 map.offset = m32.offset;
204 map.size = m32.size;
205 map.type = m32.type;
206 map.flags = m32.flags;
9a186645 207
b36180a3
AV		 208 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
209 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 210 if (err)
211 return err;
212
b36180a3
AV		 213 m32.offset = map.offset;
214 m32.mtrr = map.mtrr;
215 m32.handle = ptr_to_compat(map.handle);
216 if (map.handle != compat_ptr(m32.handle))
499447db 217 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
b36180a3 218 map.handle, m32.type, m32.offset);
9a186645
DA		 219
220 if (copy_to_user(argp, &m32, sizeof(m32)))
221 return -EFAULT;
222
223 return 0;
224}
225
226static int compat_drm_rmmap(struct file *file, unsigned int cmd,
227 unsigned long arg)
228{
229 drm_map32_t __user *argp = (void __user *)arg;
ff4135ae 230 struct drm_map __user *map;
9a186645
DA		 231 u32 handle;
232
233 if (get_user(handle, &argp->handle))
234 return -EFAULT;
235
236 map = compat_alloc_user_space(sizeof(*map));
1f96beec 237 if (!map)
9a186645 238 return -EFAULT;
b5e89ed5 239 if (__put_user((void *)(unsigned long)handle, &map->handle))
9a186645
DA		 240 return -EFAULT;
241
ed8b6704 242 return drm_ioctl(file, DRM_IOCTL_RM_MAP, (unsigned long)map);
9a186645
DA		 243}
244
245typedef struct drm_client32 {
2640981f
DV		 246 int idx; /* Which client desired? */
247 int auth; /* Is client authenticated? */
248 u32 pid; /* Process ID */
249 u32 uid; /* User ID */
250 u32 magic; /* Magic */
251 u32 iocs; /* Ioctl count */
9a186645
DA		 252} drm_client32_t;
253
254static int compat_drm_getclient(struct file *file, unsigned int cmd,
255 unsigned long arg)
256{
257 drm_client32_t c32;
258 drm_client32_t __user *argp = (void __user *)arg;
9e92662d
AV		 259 struct drm_client client;
260 int err;
9a186645 261
9e92662d 262 if (copy_from_user(&c32, argp, sizeof(c32)))
9a186645
DA		 263 return -EFAULT;
264
9e92662d 265 client.idx = c32.idx;
9a186645 266
9e92662d 267 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
9a186645
DA		 268 if (err)
269 return err;
270
9e92662d
AV		 271 c32.idx = client.idx;
272 c32.auth = client.auth;
273 c32.pid = client.pid;
274 c32.uid = client.uid;
275 c32.magic = client.magic;
276 c32.iocs = client.iocs;
9a186645
DA		 277
278 if (copy_to_user(argp, &c32, sizeof(c32)))
279 return -EFAULT;
280 return 0;
281}
282
283typedef struct drm_stats32 {
284 u32 count;
285 struct {
286 u32 value;
ff4135ae 287 enum drm_stat_type type;
9a186645
DA		 288 } data[15];
289} drm_stats32_t;
290
291static int compat_drm_getstats(struct file *file, unsigned int cmd,
292 unsigned long arg)
293{
9a186645 294 drm_stats32_t __user *argp = (void __user *)arg;
8547ee9d 295 int err;
9a186645 296
8547ee9d 297 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
9a186645
DA		 298 if (err)
299 return err;
300
8547ee9d 301 if (clear_user(argp, sizeof(drm_stats32_t)))
9a186645
DA		 302 return -EFAULT;
303 return 0;
304}
305
306typedef struct drm_buf_desc32 {
2640981f
DV		 307 int count; /* Number of buffers of this size */
308 int size; /* Size in bytes */
309 int low_mark; /* Low water mark */
310 int high_mark; /* High water mark */
b5e89ed5 311 int flags;
2640981f 312 u32 agp_start; /* Start address in the AGP aperture */
9a186645
DA		 313} drm_buf_desc32_t;
314
315static int compat_drm_addbufs(struct file *file, unsigned int cmd,
316 unsigned long arg)
317{
318 drm_buf_desc32_t __user *argp = (void __user *)arg;
ff22ff9e
AV		 319 drm_buf_desc32_t desc32;
320 struct drm_buf_desc desc;
9a186645 321 int err;
9a186645 322
ff22ff9e 323 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
9a186645
DA		 324 return -EFAULT;
325
ff22ff9e
AV		 326 desc = (struct drm_buf_desc){
327 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
328 desc32.flags, desc32.agp_start
329 };
9a186645 330
ff22ff9e
AV		 331 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
332 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 333 if (err)
334 return err;
335
ff22ff9e
AV		 336 desc32 = (drm_buf_desc32_t){
337 desc.count, desc.size, desc.low_mark, desc.high_mark,
338 desc.flags, desc.agp_start
339 };
340 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
9a186645
DA		 341 return -EFAULT;
342
343 return 0;
344}
345
346static int compat_drm_markbufs(struct file *file, unsigned int cmd,
347 unsigned long arg)
348{
349 drm_buf_desc32_t b32;
350 drm_buf_desc32_t __user *argp = (void __user *)arg;
dbae740e 351 struct drm_buf_desc __user buf;
9a186645
DA		 352
353 if (copy_from_user(&b32, argp, sizeof(b32)))
354 return -EFAULT;
355
dbae740e
AV		 356 buf.size = b32.size;
357 buf.low_mark = b32.low_mark;
358 buf.high_mark = b32.high_mark;
9a186645 359
dbae740e
AV		 360 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
361 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 362}
363
364typedef struct drm_buf_info32 {
b5e89ed5
DA		 365 int count; /**< Entries in list */
366 u32 list;
9a186645
DA		 367} drm_buf_info32_t;
368
5c7640ab
AV		 369static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
370{
371 drm_buf_info32_t *request = data;
372 drm_buf_desc32_t __user *to = compat_ptr(request->list);
373 drm_buf_desc32_t v = {.count = from->buf_count,
374 .size = from->buf_size,
375 .low_mark = from->low_mark,
376 .high_mark = from->high_mark};
377 return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
378}
379
380static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
381 struct drm_file *file_priv)
382{
383 drm_buf_info32_t *request = data;
384 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
385}
386
9a186645
DA		 387static int compat_drm_infobufs(struct file *file, unsigned int cmd,
388 unsigned long arg)
389{
390 drm_buf_info32_t req32;
391 drm_buf_info32_t __user *argp = (void __user *)arg;
5c7640ab 392 int err;
9a186645
DA		 393
394 if (copy_from_user(&req32, argp, sizeof(req32)))
395 return -EFAULT;
396
5c7640ab
AV		 397 if (req32.count < 0)
398 req32.count = 0;
9a186645 399
5c7640ab 400 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
9a186645
DA		 401 if (err)
402 return err;
403
5c7640ab 404 if (put_user(req32.count, &argp->count))
9a186645
DA		 405 return -EFAULT;
406
407 return 0;
408}
409
410typedef struct drm_buf_pub32 {
b5e89ed5
DA		 411 int idx; /**< Index into the master buffer list */
412 int total; /**< Buffer size */
413 int used; /**< Amount of buffer in use (for DMA) */
414 u32 address; /**< Address of buffer */
9a186645
DA		 415} drm_buf_pub32_t;
416
417typedef struct drm_buf_map32 {
b5e89ed5
DA		 418 int count; /**< Length of the buffer list */
419 u32 virtual; /**< Mmap'd area in user-virtual */
420 u32 list; /**< Buffer information */
9a186645
DA		 421} drm_buf_map32_t;
422
423static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
424 unsigned long arg)
425{
426 drm_buf_map32_t __user *argp = (void __user *)arg;
427 drm_buf_map32_t req32;
428 drm_buf_pub32_t __user *list32;
ff4135ae
DA		 429 struct drm_buf_map __user *request;
430 struct drm_buf_pub __user *list;
9a186645
DA		 431 int i, err;
432 int count, actual;
433 size_t nbytes;
434 void __user *addr;
435
436 if (copy_from_user(&req32, argp, sizeof(req32)))
437 return -EFAULT;
438 count = req32.count;
439 list32 = (void __user *)(unsigned long)req32.list;
440
441 if (count < 0)
442 return -EINVAL;
ff4135ae 443 nbytes = sizeof(*request) + count * sizeof(struct drm_buf_pub);
9a186645 444 request = compat_alloc_user_space(nbytes);
1f96beec 445 if (!request)
9a186645 446 return -EFAULT;
ff4135ae 447 list = (struct drm_buf_pub *) (request + 1);
9a186645
DA		 448
449 if (__put_user(count, &request->count)
450 || __put_user(list, &request->list))
451 return -EFAULT;
452
ed8b6704 453 err = drm_ioctl(file, DRM_IOCTL_MAP_BUFS, (unsigned long)request);
9a186645
DA		 454 if (err)
455 return err;
456
457 if (__get_user(actual, &request->count))
458 return -EFAULT;
459 if (count >= actual)
460 for (i = 0; i < actual; ++i)
461 if (__copy_in_user(&list32[i], &list[i],
ff4135ae 462 offsetof(struct drm_buf_pub, address))
9a186645 463 || __get_user(addr, &list[i].address)
b5e89ed5 464 || __put_user((unsigned long)addr,
9a186645
DA		 465 &list32[i].address))
466 return -EFAULT;
467
468 if (__put_user(actual, &argp->count)
469 || __get_user(addr, &request->virtual)
b5e89ed5 470 || __put_user((unsigned long)addr, &argp->virtual))
9a186645
DA		 471 return -EFAULT;
472
473 return 0;
474}
475
476typedef struct drm_buf_free32 {
b5e89ed5
DA		 477 int count;
478 u32 list;
9a186645
DA		 479} drm_buf_free32_t;
480
481static int compat_drm_freebufs(struct file *file, unsigned int cmd,
482 unsigned long arg)
483{
484 drm_buf_free32_t req32;
8c9e4cfb 485 struct drm_buf_free request;
9a186645
DA		 486 drm_buf_free32_t __user *argp = (void __user *)arg;
487
488 if (copy_from_user(&req32, argp, sizeof(req32)))
489 return -EFAULT;
490
8c9e4cfb
AV		 491 request.count = req32.count;
492 request.list = compat_ptr(req32.list);
493 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
9a186645
DA		 494}
495
496typedef struct drm_ctx_priv_map32 {
b5e89ed5
DA		 497 unsigned int ctx_id; /**< Context requesting private mapping */
498 u32 handle; /**< Handle of map */
9a186645
DA		 499} drm_ctx_priv_map32_t;
500
501static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
502 unsigned long arg)
503{
504 drm_ctx_priv_map32_t req32;
7900c600 505 struct drm_ctx_priv_map request;
9a186645
DA		 506 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
507
508 if (copy_from_user(&req32, argp, sizeof(req32)))
509 return -EFAULT;
510
7900c600
AV		 511 request.ctx_id = req32.ctx_id;
512 request.handle = compat_ptr(req32.handle);
513 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
514 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 515}
516
517static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
518 unsigned long arg)
519{
d7631e30
AV		 520 struct drm_ctx_priv_map req;
521 drm_ctx_priv_map32_t req32;
9a186645
DA		 522 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
523 int err;
9a186645 524
d7631e30 525 if (copy_from_user(&req32, argp, sizeof(req32)))
9a186645
DA		 526 return -EFAULT;
527
d7631e30
AV		 528 req.ctx_id = req32.ctx_id;
529 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
9a186645
DA		 530 if (err)
531 return err;
532
d7631e30
AV		 533 req32.handle = ptr_to_compat(req.handle);
534 if (copy_to_user(argp, &req32, sizeof(req32)))
9a186645
DA		 535 return -EFAULT;
536
537 return 0;
538}
539
540typedef struct drm_ctx_res32 {
b5e89ed5
DA		 541 int count;
542 u32 contexts;
9a186645
DA		 543} drm_ctx_res32_t;
544
545static int compat_drm_resctx(struct file *file, unsigned int cmd,
546 unsigned long arg)
547{
548 drm_ctx_res32_t __user *argp = (void __user *)arg;
549 drm_ctx_res32_t res32;
ff4135ae 550 struct drm_ctx_res __user *res;
9a186645
DA		 551 int err;
552
553 if (copy_from_user(&res32, argp, sizeof(res32)))
554 return -EFAULT;
555
556 res = compat_alloc_user_space(sizeof(*res));
1f96beec 557 if (!res)
9a186645
DA		 558 return -EFAULT;
559 if (__put_user(res32.count, &res->count)
ff4135ae 560 || __put_user((struct drm_ctx __user *) (unsigned long)res32.contexts,
9a186645
DA		 561 &res->contexts))
562 return -EFAULT;
563
ed8b6704 564 err = drm_ioctl(file, DRM_IOCTL_RES_CTX, (unsigned long)res);
9a186645
DA		 565 if (err)
566 return err;
567
568 if (__get_user(res32.count, &res->count)
569 || __put_user(res32.count, &argp->count))
570 return -EFAULT;
571
572 return 0;
573}
574
575typedef struct drm_dma32 {
b5e89ed5
DA		 576 int context; /**< Context handle */
577 int send_count; /**< Number of buffers to send */
578 u32 send_indices; /**< List of handles to buffers */
579 u32 send_sizes; /**< Lengths of data to send */
ff4135ae 580 enum drm_dma_flags flags; /**< Flags */
b5e89ed5
DA		 581 int request_count; /**< Number of buffers requested */
582 int request_size; /**< Desired size for buffers */
583 u32 request_indices; /**< Buffer information */
584 u32 request_sizes;
585 int granted_count; /**< Number of buffers granted */
9a186645
DA		 586} drm_dma32_t;
587
588static int compat_drm_dma(struct file *file, unsigned int cmd,
589 unsigned long arg)
590{
591 drm_dma32_t d32;
b5e89ed5 592 drm_dma32_t __user *argp = (void __user *)arg;
ff4135ae 593 struct drm_dma __user *d;
9a186645
DA		 594 int err;
595
596 if (copy_from_user(&d32, argp, sizeof(d32)))
597 return -EFAULT;
598
599 d = compat_alloc_user_space(sizeof(*d));
1f96beec 600 if (!d)
9a186645
DA		 601 return -EFAULT;
602
603 if (__put_user(d32.context, &d->context)
604 || __put_user(d32.send_count, &d->send_count)
b5e89ed5 605 || __put_user((int __user *)(unsigned long)d32.send_indices,
9a186645 606 &d->send_indices)
b5e89ed5 607 || __put_user((int __user *)(unsigned long)d32.send_sizes,
9a186645
DA		 608 &d->send_sizes)
609 || __put_user(d32.flags, &d->flags)
610 || __put_user(d32.request_count, &d->request_count)
b5e89ed5 611 || __put_user((int __user *)(unsigned long)d32.request_indices,
9a186645 612 &d->request_indices)
b5e89ed5 613 || __put_user((int __user *)(unsigned long)d32.request_sizes,
9a186645
DA		 614 &d->request_sizes))
615 return -EFAULT;
616
ed8b6704 617 err = drm_ioctl(file, DRM_IOCTL_DMA, (unsigned long)d);
9a186645
DA		 618 if (err)
619 return err;
620
621 if (__get_user(d32.request_size, &d->request_size)
622 || __get_user(d32.granted_count, &d->granted_count)
623 || __put_user(d32.request_size, &argp->request_size)
624 || __put_user(d32.granted_count, &argp->granted_count))
625 return -EFAULT;
626
627 return 0;
628}
629
a7fb8a23 630#if IS_ENABLED(CONFIG_AGP)
9a186645
DA		 631typedef struct drm_agp_mode32 {
632 u32 mode; /**< AGP mode */
633} drm_agp_mode32_t;
634
635static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
636 unsigned long arg)
637{
638 drm_agp_mode32_t __user *argp = (void __user *)arg;
639 drm_agp_mode32_t m32;
ff4135ae 640 struct drm_agp_mode __user *mode;
9a186645
DA		 641
642 if (get_user(m32.mode, &argp->mode))
643 return -EFAULT;
644
645 mode = compat_alloc_user_space(sizeof(*mode));
646 if (put_user(m32.mode, &mode->mode))
647 return -EFAULT;
648
ed8b6704 649 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
9a186645
DA		 650}
651
652typedef struct drm_agp_info32 {
b5e89ed5
DA		 653 int agp_version_major;
654 int agp_version_minor;
655 u32 mode;
656 u32 aperture_base; /* physical address */
657 u32 aperture_size; /* bytes */
658 u32 memory_allowed; /* bytes */
659 u32 memory_used;
660
661 /* PCI information */
9a186645
DA		 662 unsigned short id_vendor;
663 unsigned short id_device;
664} drm_agp_info32_t;
665
666static int compat_drm_agp_info(struct file *file, unsigned int cmd,
667 unsigned long arg)
668{
669 drm_agp_info32_t __user *argp = (void __user *)arg;
670 drm_agp_info32_t i32;
ff4135ae 671 struct drm_agp_info __user *info;
9a186645
DA		 672 int err;
673
674 info = compat_alloc_user_space(sizeof(*info));
1f96beec 675 if (!info)
9a186645
DA		 676 return -EFAULT;
677
ed8b6704 678 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
9a186645
DA		 679 if (err)
680 return err;
681
682 if (__get_user(i32.agp_version_major, &info->agp_version_major)
683 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
684 || __get_user(i32.mode, &info->mode)
685 || __get_user(i32.aperture_base, &info->aperture_base)
686 || __get_user(i32.aperture_size, &info->aperture_size)
687 || __get_user(i32.memory_allowed, &info->memory_allowed)
688 || __get_user(i32.memory_used, &info->memory_used)
689 || __get_user(i32.id_vendor, &info->id_vendor)
690 || __get_user(i32.id_device, &info->id_device))
691 return -EFAULT;
692
693 if (copy_to_user(argp, &i32, sizeof(i32)))
694 return -EFAULT;
695
696 return 0;
697}
698
699typedef struct drm_agp_buffer32 {
700 u32 size; /**< In bytes -- will round to page boundary */
701 u32 handle; /**< Used for binding / unbinding */
702 u32 type; /**< Type of memory to allocate */
b5e89ed5 703 u32 physical; /**< Physical used by i810 */
9a186645
DA		 704} drm_agp_buffer32_t;
705
706static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
707 unsigned long arg)
708{
709 drm_agp_buffer32_t __user *argp = (void __user *)arg;
710 drm_agp_buffer32_t req32;
ff4135ae 711 struct drm_agp_buffer __user *request;
9a186645
DA		 712 int err;
713
714 if (copy_from_user(&req32, argp, sizeof(req32)))
715 return -EFAULT;
716
717 request = compat_alloc_user_space(sizeof(*request));
1f96beec 718 if (!request
9a186645
DA		 719 || __put_user(req32.size, &request->size)
720 || __put_user(req32.type, &request->type))
721 return -EFAULT;
722
ed8b6704 723 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
9a186645
DA		 724 if (err)
725 return err;
726
727 if (__get_user(req32.handle, &request->handle)
728 || __get_user(req32.physical, &request->physical)
729 || copy_to_user(argp, &req32, sizeof(req32))) {
ed8b6704 730 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
9a186645
DA		 731 return -EFAULT;
732 }
733
734 return 0;
735}
736
737static int compat_drm_agp_free(struct file *file, unsigned int cmd,
738 unsigned long arg)
739{
740 drm_agp_buffer32_t __user *argp = (void __user *)arg;
ff4135ae 741 struct drm_agp_buffer __user *request;
9a186645
DA		 742 u32 handle;
743
744 request = compat_alloc_user_space(sizeof(*request));
1f96beec 745 if (!request
9a186645
DA		 746 || get_user(handle, &argp->handle)
747 || __put_user(handle, &request->handle))
748 return -EFAULT;
749
ed8b6704 750 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
9a186645
DA		 751}
752
753typedef struct drm_agp_binding32 {
754 u32 handle; /**< From drm_agp_buffer */
755 u32 offset; /**< In bytes -- will round to page boundary */
756} drm_agp_binding32_t;
757
758static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
759 unsigned long arg)
760{
761 drm_agp_binding32_t __user *argp = (void __user *)arg;
762 drm_agp_binding32_t req32;
ff4135ae 763 struct drm_agp_binding __user *request;
9a186645
DA		 764
765 if (copy_from_user(&req32, argp, sizeof(req32)))
766 return -EFAULT;
767
768 request = compat_alloc_user_space(sizeof(*request));
1f96beec 769 if (!request
9a186645
DA		 770 || __put_user(req32.handle, &request->handle)
771 || __put_user(req32.offset, &request->offset))
772 return -EFAULT;
773
ed8b6704 774 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
9a186645
DA		 775}
776
777static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
778 unsigned long arg)
779{
780 drm_agp_binding32_t __user *argp = (void __user *)arg;
ff4135ae 781 struct drm_agp_binding __user *request;
9a186645
DA		 782 u32 handle;
783
784 request = compat_alloc_user_space(sizeof(*request));
1f96beec 785 if (!request
9a186645
DA		 786 || get_user(handle, &argp->handle)
787 || __put_user(handle, &request->handle))
788 return -EFAULT;
789
ed8b6704 790 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
9a186645 791}
a7fb8a23 792#endif /* CONFIG_AGP */
9a186645
DA		 793
794typedef struct drm_scatter_gather32 {
795 u32 size; /**< In bytes -- will round to page boundary */
796 u32 handle; /**< Used for mapping / unmapping */
797} drm_scatter_gather32_t;
798
799static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
800 unsigned long arg)
801{
802 drm_scatter_gather32_t __user *argp = (void __user *)arg;
ff4135ae 803 struct drm_scatter_gather __user *request;
9a186645
DA		 804 int err;
805 unsigned long x;
806
807 request = compat_alloc_user_space(sizeof(*request));
1f96beec 808 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
9a186645
DA		 809 || __get_user(x, &argp->size)
810 || __put_user(x, &request->size))
811 return -EFAULT;
812
ed8b6704 813 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
9a186645
DA		 814 if (err)
815 return err;
816
817 /* XXX not sure about the handle conversion here... */
818 if (__get_user(x, &request->handle)
819 || __put_user(x >> PAGE_SHIFT, &argp->handle))
820 return -EFAULT;
821
822 return 0;
823}
824
825static int compat_drm_sg_free(struct file *file, unsigned int cmd,
826 unsigned long arg)
827{
828 drm_scatter_gather32_t __user *argp = (void __user *)arg;
ff4135ae 829 struct drm_scatter_gather __user *request;
9a186645
DA		 830 unsigned long x;
831
832 request = compat_alloc_user_space(sizeof(*request));
1f96beec 833 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
9a186645
DA		 834 || __get_user(x, &argp->handle)
835 || __put_user(x << PAGE_SHIFT, &request->handle))
836 return -EFAULT;
837
ed8b6704 838 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
9a186645
DA		 839}
840
09e40d65 841#if defined(CONFIG_X86) || defined(CONFIG_IA64)
49568873
EA		 842typedef struct drm_update_draw32 {
843 drm_drawable_t handle;
844 unsigned int type;
845 unsigned int num;
846 /* 64-bit version has a 32-bit pad here */
847 u64 data; /**< Pointer */
848} __attribute__((packed)) drm_update_draw32_t;
849
850static int compat_drm_update_draw(struct file *file, unsigned int cmd,
851 unsigned long arg)
852{
853 drm_update_draw32_t update32;
854 struct drm_update_draw __user *request;
855 int err;
856
857 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
858 return -EFAULT;
859
860 request = compat_alloc_user_space(sizeof(*request));
1f96beec 861 if (!request ||
49568873
EA		 862 __put_user(update32.handle, &request->handle) ||
863 __put_user(update32.type, &request->type) ||
864 __put_user(update32.num, &request->num) ||
865 __put_user(update32.data, &request->data))
866 return -EFAULT;
867
ed8b6704 868 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
49568873
EA		 869 return err;
870}
09e40d65 871#endif
49568873 872
9a186645 873struct drm_wait_vblank_request32 {
ff4135ae 874 enum drm_vblank_seq_type type;
9a186645
DA		 875 unsigned int sequence;
876 u32 signal;
877};
878
879struct drm_wait_vblank_reply32 {
ff4135ae 880 enum drm_vblank_seq_type type;
9a186645
DA		 881 unsigned int sequence;
882 s32 tval_sec;
883 s32 tval_usec;
884};
885
886typedef union drm_wait_vblank32 {
887 struct drm_wait_vblank_request32 request;
888 struct drm_wait_vblank_reply32 reply;
889} drm_wait_vblank32_t;
890
891static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
892 unsigned long arg)
893{
894 drm_wait_vblank32_t __user *argp = (void __user *)arg;
895 drm_wait_vblank32_t req32;
ff4135ae 896 union drm_wait_vblank __user *request;
9a186645
DA		 897 int err;
898
899 if (copy_from_user(&req32, argp, sizeof(req32)))
900 return -EFAULT;
901
902 request = compat_alloc_user_space(sizeof(*request));
1f96beec 903 if (!request
9a186645
DA		 904 || __put_user(req32.request.type, &request->request.type)
905 || __put_user(req32.request.sequence, &request->request.sequence)
906 || __put_user(req32.request.signal, &request->request.signal))
907 return -EFAULT;
908
ed8b6704 909 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
9a186645
DA		 910 if (err)
911 return err;
912
913 if (__get_user(req32.reply.type, &request->reply.type)
914 || __get_user(req32.reply.sequence, &request->reply.sequence)
915 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
916 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
917 return -EFAULT;
918
919 if (copy_to_user(argp, &req32, sizeof(req32)))
920 return -EFAULT;
921
922 return 0;
923}
924
a988588b 925#if defined(CONFIG_X86) || defined(CONFIG_IA64)
c631d5f9
TU		 926typedef struct drm_mode_fb_cmd232 {
927 u32 fb_id;
928 u32 width;
929 u32 height;
930 u32 pixel_format;
931 u32 flags;
932 u32 handles[4];
933 u32 pitches[4];
934 u32 offsets[4];
935 u64 modifier[4];
936} __attribute__((packed)) drm_mode_fb_cmd232_t;
937
938static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
939 unsigned long arg)
940{
941 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
942 struct drm_mode_fb_cmd232 req32;
943 struct drm_mode_fb_cmd2 __user *req64;
944 int i;
945 int err;
946
947 if (copy_from_user(&req32, argp, sizeof(req32)))
948 return -EFAULT;
949
950 req64 = compat_alloc_user_space(sizeof(*req64));
951
952 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
953 || __put_user(req32.width, &req64->width)
954 || __put_user(req32.height, &req64->height)
955 || __put_user(req32.pixel_format, &req64->pixel_format)
956 || __put_user(req32.flags, &req64->flags))
957 return -EFAULT;
958
959 for (i = 0; i < 4; i++) {
960 if (__put_user(req32.handles[i], &req64->handles[i]))
961 return -EFAULT;
962 if (__put_user(req32.pitches[i], &req64->pitches[i]))
963 return -EFAULT;
964 if (__put_user(req32.offsets[i], &req64->offsets[i]))
965 return -EFAULT;
966 if (__put_user(req32.modifier[i], &req64->modifier[i]))
967 return -EFAULT;
968 }
969
970 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
971 if (err)
972 return err;
973
974 if (__get_user(req32.fb_id, &req64->fb_id))
975 return -EFAULT;
976
977 if (copy_to_user(argp, &req32, sizeof(req32)))
978 return -EFAULT;
979
980 return 0;
981}
a988588b 982#endif
c631d5f9 983
9f43e542
AV		 984static struct {
985 drm_ioctl_compat_t *fn;
986 char *name;
987} drm_compat_ioctls[] = {
ff22ff9e 988#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
012c6741 989 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
17e3dade 990 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
8c4fe499 991 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
9e92662d 992 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
8547ee9d 993 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
56c275cc 994 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
b36180a3 995 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
ff22ff9e 996 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
dbae740e 997 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
5c7640ab 998 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
9f43e542 999 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)].fn = compat_drm_mapbufs,
8c9e4cfb 1000 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
9f43e542 1001 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)].fn = compat_drm_rmmap,
7900c600 1002 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
d7631e30 1003 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
9f43e542
AV		 1004 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)].fn = compat_drm_resctx,
1005 [DRM_IOCTL_NR(DRM_IOCTL_DMA32)].fn = compat_drm_dma,
a7fb8a23 1006#if IS_ENABLED(CONFIG_AGP)
9f43e542
AV		 1007 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)].fn = compat_drm_agp_enable,
1008 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)].fn = compat_drm_agp_info,
1009 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)].fn = compat_drm_agp_alloc,
1010 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)].fn = compat_drm_agp_free,
1011 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)].fn = compat_drm_agp_bind,
1012 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)].fn = compat_drm_agp_unbind,
9a186645 1013#endif
9f43e542
AV		 1014 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)].fn = compat_drm_sg_alloc,
1015 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)].fn = compat_drm_sg_free,
09e40d65 1016#if defined(CONFIG_X86) || defined(CONFIG_IA64)
9f43e542 1017 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)].fn = compat_drm_update_draw,
09e40d65 1018#endif
9f43e542 1019 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)].fn = compat_drm_wait_vblank,
a988588b 1020#if defined(CONFIG_X86) || defined(CONFIG_IA64)
9f43e542 1021 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)].fn = compat_drm_mode_addfb2,
a988588b 1022#endif
9a186645
DA		 1023};
1024
1025/**
2640981f
DV		 1026 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
1027 * @filp: file this ioctl is called on
1028 * @cmd: ioctl cmd number
1029 * @arg: user argument
1030 *
1031 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
1032 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
1033 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
1034 * botched IOCTL itself, it must handle those by wrapping this function.
9a186645 1035 *
2640981f
DV		 1036 * Returns:
1037 * Zero on success, negative error code on failure.
9a186645
DA		 1038 */
1039long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1040{
1041 unsigned int nr = DRM_IOCTL_NR(cmd);
1042 drm_ioctl_compat_t *fn;
1043 int ret;
1044
7ffa05e0
IR		 1045 /* Assume that ioctls without an explicit compat routine will just
1046 * work. This may not always be a good assumption, but it's better
1047 * than always failing.
1048 */
3d77461e 1049 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
ed8b6704 1050 return drm_ioctl(filp, cmd, arg);
9a186645 1051
9f43e542
AV		 1052 fn = drm_compat_ioctls[nr].fn;
1053 if (!fn)
1054 return drm_ioctl(filp, cmd, arg);
9a186645 1055
9f43e542
AV		 1056 if (drm_compat_ioctls[nr].name) {
1057 struct drm_file *file_priv = filp->private_data;
1058 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
1059 task_pid_nr(current),
1060 (long)old_encode_dev(file_priv->minor->kdev->devt),
1061 file_priv->authenticated,
1062 drm_compat_ioctls[nr].name);
b5e89ed5 1063 ret = (*fn) (filp, cmd, arg);
9f43e542
AV		 1064 if (ret)
1065 DRM_DEBUG("ret = %d\n", ret);
1066 } else {
1067 ret = (*fn) (filp, cmd, arg);
1068 }
9a186645
DA		 1069 return ret;
1070}
1071EXPORT_SYMBOL(drm_compat_ioctl);
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