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switch compat_drm_dma() 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;
9e075680 550 struct drm_ctx_res res;
9a186645
DA		 551 int err;
552
553 if (copy_from_user(&res32, argp, sizeof(res32)))
554 return -EFAULT;
555
9e075680
AV		 556 res.count = res32.count;
557 res.contexts = compat_ptr(res32.contexts);
558 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
9a186645
DA		 559 if (err)
560 return err;
561
9e075680
AV		 562 res32.count = res.count;
563 if (copy_to_user(argp, &res32, sizeof(res32)))
9a186645
DA		 564 return -EFAULT;
565
566 return 0;
567}
568
569typedef struct drm_dma32 {
b5e89ed5
DA		 570 int context; /**< Context handle */
571 int send_count; /**< Number of buffers to send */
572 u32 send_indices; /**< List of handles to buffers */
573 u32 send_sizes; /**< Lengths of data to send */
ff4135ae 574 enum drm_dma_flags flags; /**< Flags */
b5e89ed5
DA		 575 int request_count; /**< Number of buffers requested */
576 int request_size; /**< Desired size for buffers */
577 u32 request_indices; /**< Buffer information */
578 u32 request_sizes;
579 int granted_count; /**< Number of buffers granted */
9a186645
DA		 580} drm_dma32_t;
581
582static int compat_drm_dma(struct file *file, unsigned int cmd,
583 unsigned long arg)
584{
585 drm_dma32_t d32;
b5e89ed5 586 drm_dma32_t __user *argp = (void __user *)arg;
c6f08966 587 struct drm_dma d;
9a186645
DA		 588 int err;
589
590 if (copy_from_user(&d32, argp, sizeof(d32)))
591 return -EFAULT;
592
c6f08966
AV		 593 d.context = d32.context;
594 d.send_count = d32.send_count;
595 d.send_indices = compat_ptr(d32.send_indices);
596 d.send_sizes = compat_ptr(d32.send_sizes);
597 d.flags = d32.flags;
598 d.request_count = d32.request_count;
599 d.request_indices = compat_ptr(d32.request_indices);
600 d.request_sizes = compat_ptr(d32.request_sizes);
601 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
9a186645
DA		 602 if (err)
603 return err;
604
c6f08966
AV		 605 if (put_user(d.request_size, &argp->request_size)
606 || put_user(d.granted_count, &argp->granted_count))
9a186645
DA		 607 return -EFAULT;
608
609 return 0;
610}
611
a7fb8a23 612#if IS_ENABLED(CONFIG_AGP)
9a186645
DA		 613typedef struct drm_agp_mode32 {
614 u32 mode; /**< AGP mode */
615} drm_agp_mode32_t;
616
617static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
618 unsigned long arg)
619{
620 drm_agp_mode32_t __user *argp = (void __user *)arg;
621 drm_agp_mode32_t m32;
ff4135ae 622 struct drm_agp_mode __user *mode;
9a186645
DA		 623
624 if (get_user(m32.mode, &argp->mode))
625 return -EFAULT;
626
627 mode = compat_alloc_user_space(sizeof(*mode));
628 if (put_user(m32.mode, &mode->mode))
629 return -EFAULT;
630
ed8b6704 631 return drm_ioctl(file, DRM_IOCTL_AGP_ENABLE, (unsigned long)mode);
9a186645
DA		 632}
633
634typedef struct drm_agp_info32 {
b5e89ed5
DA		 635 int agp_version_major;
636 int agp_version_minor;
637 u32 mode;
638 u32 aperture_base; /* physical address */
639 u32 aperture_size; /* bytes */
640 u32 memory_allowed; /* bytes */
641 u32 memory_used;
642
643 /* PCI information */
9a186645
DA		 644 unsigned short id_vendor;
645 unsigned short id_device;
646} drm_agp_info32_t;
647
648static int compat_drm_agp_info(struct file *file, unsigned int cmd,
649 unsigned long arg)
650{
651 drm_agp_info32_t __user *argp = (void __user *)arg;
652 drm_agp_info32_t i32;
ff4135ae 653 struct drm_agp_info __user *info;
9a186645
DA		 654 int err;
655
656 info = compat_alloc_user_space(sizeof(*info));
1f96beec 657 if (!info)
9a186645
DA		 658 return -EFAULT;
659
ed8b6704 660 err = drm_ioctl(file, DRM_IOCTL_AGP_INFO, (unsigned long)info);
9a186645
DA		 661 if (err)
662 return err;
663
664 if (__get_user(i32.agp_version_major, &info->agp_version_major)
665 || __get_user(i32.agp_version_minor, &info->agp_version_minor)
666 || __get_user(i32.mode, &info->mode)
667 || __get_user(i32.aperture_base, &info->aperture_base)
668 || __get_user(i32.aperture_size, &info->aperture_size)
669 || __get_user(i32.memory_allowed, &info->memory_allowed)
670 || __get_user(i32.memory_used, &info->memory_used)
671 || __get_user(i32.id_vendor, &info->id_vendor)
672 || __get_user(i32.id_device, &info->id_device))
673 return -EFAULT;
674
675 if (copy_to_user(argp, &i32, sizeof(i32)))
676 return -EFAULT;
677
678 return 0;
679}
680
681typedef struct drm_agp_buffer32 {
682 u32 size; /**< In bytes -- will round to page boundary */
683 u32 handle; /**< Used for binding / unbinding */
684 u32 type; /**< Type of memory to allocate */
b5e89ed5 685 u32 physical; /**< Physical used by i810 */
9a186645
DA		 686} drm_agp_buffer32_t;
687
688static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
689 unsigned long arg)
690{
691 drm_agp_buffer32_t __user *argp = (void __user *)arg;
692 drm_agp_buffer32_t req32;
ff4135ae 693 struct drm_agp_buffer __user *request;
9a186645
DA		 694 int err;
695
696 if (copy_from_user(&req32, argp, sizeof(req32)))
697 return -EFAULT;
698
699 request = compat_alloc_user_space(sizeof(*request));
1f96beec 700 if (!request
9a186645
DA		 701 || __put_user(req32.size, &request->size)
702 || __put_user(req32.type, &request->type))
703 return -EFAULT;
704
ed8b6704 705 err = drm_ioctl(file, DRM_IOCTL_AGP_ALLOC, (unsigned long)request);
9a186645
DA		 706 if (err)
707 return err;
708
709 if (__get_user(req32.handle, &request->handle)
710 || __get_user(req32.physical, &request->physical)
711 || copy_to_user(argp, &req32, sizeof(req32))) {
ed8b6704 712 drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
9a186645
DA		 713 return -EFAULT;
714 }
715
716 return 0;
717}
718
719static int compat_drm_agp_free(struct file *file, unsigned int cmd,
720 unsigned long arg)
721{
722 drm_agp_buffer32_t __user *argp = (void __user *)arg;
ff4135ae 723 struct drm_agp_buffer __user *request;
9a186645
DA		 724 u32 handle;
725
726 request = compat_alloc_user_space(sizeof(*request));
1f96beec 727 if (!request
9a186645
DA		 728 || get_user(handle, &argp->handle)
729 || __put_user(handle, &request->handle))
730 return -EFAULT;
731
ed8b6704 732 return drm_ioctl(file, DRM_IOCTL_AGP_FREE, (unsigned long)request);
9a186645
DA		 733}
734
735typedef struct drm_agp_binding32 {
736 u32 handle; /**< From drm_agp_buffer */
737 u32 offset; /**< In bytes -- will round to page boundary */
738} drm_agp_binding32_t;
739
740static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
741 unsigned long arg)
742{
743 drm_agp_binding32_t __user *argp = (void __user *)arg;
744 drm_agp_binding32_t req32;
ff4135ae 745 struct drm_agp_binding __user *request;
9a186645
DA		 746
747 if (copy_from_user(&req32, argp, sizeof(req32)))
748 return -EFAULT;
749
750 request = compat_alloc_user_space(sizeof(*request));
1f96beec 751 if (!request
9a186645
DA		 752 || __put_user(req32.handle, &request->handle)
753 || __put_user(req32.offset, &request->offset))
754 return -EFAULT;
755
ed8b6704 756 return drm_ioctl(file, DRM_IOCTL_AGP_BIND, (unsigned long)request);
9a186645
DA		 757}
758
759static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
760 unsigned long arg)
761{
762 drm_agp_binding32_t __user *argp = (void __user *)arg;
ff4135ae 763 struct drm_agp_binding __user *request;
9a186645
DA		 764 u32 handle;
765
766 request = compat_alloc_user_space(sizeof(*request));
1f96beec 767 if (!request
9a186645
DA		 768 || get_user(handle, &argp->handle)
769 || __put_user(handle, &request->handle))
770 return -EFAULT;
771
ed8b6704 772 return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
9a186645 773}
a7fb8a23 774#endif /* CONFIG_AGP */
9a186645
DA		 775
776typedef struct drm_scatter_gather32 {
777 u32 size; /**< In bytes -- will round to page boundary */
778 u32 handle; /**< Used for mapping / unmapping */
779} drm_scatter_gather32_t;
780
781static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
782 unsigned long arg)
783{
784 drm_scatter_gather32_t __user *argp = (void __user *)arg;
ff4135ae 785 struct drm_scatter_gather __user *request;
9a186645
DA		 786 int err;
787 unsigned long x;
788
789 request = compat_alloc_user_space(sizeof(*request));
1f96beec 790 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
9a186645
DA		 791 || __get_user(x, &argp->size)
792 || __put_user(x, &request->size))
793 return -EFAULT;
794
ed8b6704 795 err = drm_ioctl(file, DRM_IOCTL_SG_ALLOC, (unsigned long)request);
9a186645
DA		 796 if (err)
797 return err;
798
799 /* XXX not sure about the handle conversion here... */
800 if (__get_user(x, &request->handle)
801 || __put_user(x >> PAGE_SHIFT, &argp->handle))
802 return -EFAULT;
803
804 return 0;
805}
806
807static int compat_drm_sg_free(struct file *file, unsigned int cmd,
808 unsigned long arg)
809{
810 drm_scatter_gather32_t __user *argp = (void __user *)arg;
ff4135ae 811 struct drm_scatter_gather __user *request;
9a186645
DA		 812 unsigned long x;
813
814 request = compat_alloc_user_space(sizeof(*request));
1f96beec 815 if (!request || !access_ok(VERIFY_WRITE, argp, sizeof(*argp))
9a186645
DA		 816 || __get_user(x, &argp->handle)
817 || __put_user(x << PAGE_SHIFT, &request->handle))
818 return -EFAULT;
819
ed8b6704 820 return drm_ioctl(file, DRM_IOCTL_SG_FREE, (unsigned long)request);
9a186645
DA		 821}
822
09e40d65 823#if defined(CONFIG_X86) || defined(CONFIG_IA64)
49568873
EA		 824typedef struct drm_update_draw32 {
825 drm_drawable_t handle;
826 unsigned int type;
827 unsigned int num;
828 /* 64-bit version has a 32-bit pad here */
829 u64 data; /**< Pointer */
830} __attribute__((packed)) drm_update_draw32_t;
831
832static int compat_drm_update_draw(struct file *file, unsigned int cmd,
833 unsigned long arg)
834{
835 drm_update_draw32_t update32;
836 struct drm_update_draw __user *request;
837 int err;
838
839 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
840 return -EFAULT;
841
842 request = compat_alloc_user_space(sizeof(*request));
1f96beec 843 if (!request ||
49568873
EA		 844 __put_user(update32.handle, &request->handle) ||
845 __put_user(update32.type, &request->type) ||
846 __put_user(update32.num, &request->num) ||
847 __put_user(update32.data, &request->data))
848 return -EFAULT;
849
ed8b6704 850 err = drm_ioctl(file, DRM_IOCTL_UPDATE_DRAW, (unsigned long)request);
49568873
EA		 851 return err;
852}
09e40d65 853#endif
49568873 854
9a186645 855struct drm_wait_vblank_request32 {
ff4135ae 856 enum drm_vblank_seq_type type;
9a186645
DA		 857 unsigned int sequence;
858 u32 signal;
859};
860
861struct drm_wait_vblank_reply32 {
ff4135ae 862 enum drm_vblank_seq_type type;
9a186645
DA		 863 unsigned int sequence;
864 s32 tval_sec;
865 s32 tval_usec;
866};
867
868typedef union drm_wait_vblank32 {
869 struct drm_wait_vblank_request32 request;
870 struct drm_wait_vblank_reply32 reply;
871} drm_wait_vblank32_t;
872
873static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
874 unsigned long arg)
875{
876 drm_wait_vblank32_t __user *argp = (void __user *)arg;
877 drm_wait_vblank32_t req32;
ff4135ae 878 union drm_wait_vblank __user *request;
9a186645
DA		 879 int err;
880
881 if (copy_from_user(&req32, argp, sizeof(req32)))
882 return -EFAULT;
883
884 request = compat_alloc_user_space(sizeof(*request));
1f96beec 885 if (!request
9a186645
DA		 886 || __put_user(req32.request.type, &request->request.type)
887 || __put_user(req32.request.sequence, &request->request.sequence)
888 || __put_user(req32.request.signal, &request->request.signal))
889 return -EFAULT;
890
ed8b6704 891 err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
9a186645
DA		 892 if (err)
893 return err;
894
895 if (__get_user(req32.reply.type, &request->reply.type)
896 || __get_user(req32.reply.sequence, &request->reply.sequence)
897 || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
898 || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
899 return -EFAULT;
900
901 if (copy_to_user(argp, &req32, sizeof(req32)))
902 return -EFAULT;
903
904 return 0;
905}
906
a988588b 907#if defined(CONFIG_X86) || defined(CONFIG_IA64)
c631d5f9
TU		 908typedef struct drm_mode_fb_cmd232 {
909 u32 fb_id;
910 u32 width;
911 u32 height;
912 u32 pixel_format;
913 u32 flags;
914 u32 handles[4];
915 u32 pitches[4];
916 u32 offsets[4];
917 u64 modifier[4];
918} __attribute__((packed)) drm_mode_fb_cmd232_t;
919
920static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
921 unsigned long arg)
922{
923 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
924 struct drm_mode_fb_cmd232 req32;
925 struct drm_mode_fb_cmd2 __user *req64;
926 int i;
927 int err;
928
929 if (copy_from_user(&req32, argp, sizeof(req32)))
930 return -EFAULT;
931
932 req64 = compat_alloc_user_space(sizeof(*req64));
933
934 if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
935 || __put_user(req32.width, &req64->width)
936 || __put_user(req32.height, &req64->height)
937 || __put_user(req32.pixel_format, &req64->pixel_format)
938 || __put_user(req32.flags, &req64->flags))
939 return -EFAULT;
940
941 for (i = 0; i < 4; i++) {
942 if (__put_user(req32.handles[i], &req64->handles[i]))
943 return -EFAULT;
944 if (__put_user(req32.pitches[i], &req64->pitches[i]))
945 return -EFAULT;
946 if (__put_user(req32.offsets[i], &req64->offsets[i]))
947 return -EFAULT;
948 if (__put_user(req32.modifier[i], &req64->modifier[i]))
949 return -EFAULT;
950 }
951
952 err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
953 if (err)
954 return err;
955
956 if (__get_user(req32.fb_id, &req64->fb_id))
957 return -EFAULT;
958
959 if (copy_to_user(argp, &req32, sizeof(req32)))
960 return -EFAULT;
961
962 return 0;
963}
a988588b 964#endif
c631d5f9 965
9f43e542
AV		 966static struct {
967 drm_ioctl_compat_t *fn;
968 char *name;
969} drm_compat_ioctls[] = {
ff22ff9e 970#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
012c6741 971 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
17e3dade 972 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
8c4fe499 973 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
9e92662d 974 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
8547ee9d 975 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
56c275cc 976 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
b36180a3 977 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
ff22ff9e 978 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
dbae740e 979 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
5c7640ab 980 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
9f43e542 981 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS32)].fn = compat_drm_mapbufs,
8c9e4cfb 982 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
9f43e542 983 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP32)].fn = compat_drm_rmmap,
7900c600 984 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
d7631e30 985 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
9e075680 986 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
c6f08966 987 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
a7fb8a23 988#if IS_ENABLED(CONFIG_AGP)
9f43e542
AV		 989 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)].fn = compat_drm_agp_enable,
990 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)].fn = compat_drm_agp_info,
991 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)].fn = compat_drm_agp_alloc,
992 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE32)].fn = compat_drm_agp_free,
993 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND32)].fn = compat_drm_agp_bind,
994 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND32)].fn = compat_drm_agp_unbind,
9a186645 995#endif
9f43e542
AV		 996 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC32)].fn = compat_drm_sg_alloc,
997 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE32)].fn = compat_drm_sg_free,
09e40d65 998#if defined(CONFIG_X86) || defined(CONFIG_IA64)
9f43e542 999 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)].fn = compat_drm_update_draw,
09e40d65 1000#endif
9f43e542 1001 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)].fn = compat_drm_wait_vblank,
a988588b 1002#if defined(CONFIG_X86) || defined(CONFIG_IA64)
9f43e542 1003 [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)].fn = compat_drm_mode_addfb2,
a988588b 1004#endif
9a186645
DA		 1005};
1006
1007/**
2640981f
DV		 1008 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
1009 * @filp: file this ioctl is called on
1010 * @cmd: ioctl cmd number
1011 * @arg: user argument
1012 *
1013 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
1014 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
1015 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
1016 * botched IOCTL itself, it must handle those by wrapping this function.
9a186645 1017 *
2640981f
DV		 1018 * Returns:
1019 * Zero on success, negative error code on failure.
9a186645
DA		 1020 */
1021long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1022{
1023 unsigned int nr = DRM_IOCTL_NR(cmd);
1024 drm_ioctl_compat_t *fn;
1025 int ret;
1026
7ffa05e0
IR		 1027 /* Assume that ioctls without an explicit compat routine will just
1028 * work. This may not always be a good assumption, but it's better
1029 * than always failing.
1030 */
3d77461e 1031 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
ed8b6704 1032 return drm_ioctl(filp, cmd, arg);
9a186645 1033
9f43e542
AV		 1034 fn = drm_compat_ioctls[nr].fn;
1035 if (!fn)
1036 return drm_ioctl(filp, cmd, arg);
9a186645 1037
9f43e542
AV		 1038 if (drm_compat_ioctls[nr].name) {
1039 struct drm_file *file_priv = filp->private_data;
1040 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
1041 task_pid_nr(current),
1042 (long)old_encode_dev(file_priv->minor->kdev->devt),
1043 file_priv->authenticated,
1044 drm_compat_ioctls[nr].name);
b5e89ed5 1045 ret = (*fn) (filp, cmd, arg);
9f43e542
AV		 1046 if (ret)
1047 DRM_DEBUG("ret = %d\n", ret);
1048 } else {
1049 ret = (*fn) (filp, cmd, arg);
1050 }
9a186645
DA		 1051 return ret;
1052}
1053EXPORT_SYMBOL(drm_compat_ioctl);
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