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Merge tag 'devprop-5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[linux-2.6-block.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
0500c04e
SR		 34#include <drm/drm_agpsupport.h>
35#include <drm/drm_file.h>
36#include <drm/drm_print.h>
37
d6c56613 38#include "drm_crtc_internal.h"
0500c04e
SR		 39#include "drm_internal.h"
40#include "drm_legacy.h"
9a186645
DA		 41
42#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
43#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
44#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
45#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
46#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
47
48#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
49#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
50#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
51#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
52#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
53#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
54#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
55
56#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
57
58#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
59#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
60
61#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
62#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
63
64#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
65#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
66#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
67#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
68#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
69#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
70
71#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
72#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
73
49568873
EA		 74#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
75
9a186645
DA		 76#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
77
c631d5f9
TU		 78#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
79
9a186645 80typedef struct drm_version_32 {
2640981f
DV		 81 int version_major; /* Major version */
82 int version_minor; /* Minor version */
83 int version_patchlevel; /* Patch level */
84 u32 name_len; /* Length of name buffer */
85 u32 name; /* Name of driver */
86 u32 date_len; /* Length of date buffer */
87 u32 date; /* User-space buffer to hold date */
88 u32 desc_len; /* Length of desc buffer */
89 u32 desc; /* User-space buffer to hold desc */
9a186645
DA		 90} drm_version32_t;
91
92static int compat_drm_version(struct file *file, unsigned int cmd,
93 unsigned long arg)
94{
95 drm_version32_t v32;
012c6741 96 struct drm_version v;
9a186645
DA		 97 int err;
98
b5e89ed5 99 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
9a186645
DA		 100 return -EFAULT;
101
de066e11
DV		 102 memset(&v, 0, sizeof(v));
103
012c6741
AV		 104 v = (struct drm_version) {
105 .name_len = v32.name_len,
106 .name = compat_ptr(v32.name),
107 .date_len = v32.date_len,
108 .date = compat_ptr(v32.date),
109 .desc_len = v32.desc_len,
110 .desc = compat_ptr(v32.desc),
111 };
112 err = drm_ioctl_kernel(file, drm_version, &v,
75426367 113 DRM_RENDER_ALLOW);
9a186645
DA		 114 if (err)
115 return err;
116
012c6741
AV		 117 v32.version_major = v.version_major;
118 v32.version_minor = v.version_minor;
119 v32.version_patchlevel = v.version_patchlevel;
266530b3
JC		 120 v32.name_len = v.name_len;
121 v32.date_len = v.date_len;
122 v32.desc_len = v.desc_len;
b5e89ed5 123 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
9a186645
DA		 124 return -EFAULT;
125 return 0;
126}
127
128typedef struct drm_unique32 {
2640981f
DV		 129 u32 unique_len; /* Length of unique */
130 u32 unique; /* Unique name for driver instantiation */
9a186645
DA		 131} drm_unique32_t;
132
133static int compat_drm_getunique(struct file *file, unsigned int cmd,
134 unsigned long arg)
135{
136 drm_unique32_t uq32;
17e3dade 137 struct drm_unique uq;
9a186645
DA		 138 int err;
139
b5e89ed5 140 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
9a186645 141 return -EFAULT;
de066e11
DV		 142
143 memset(&uq, 0, sizeof(uq));
144
17e3dade
AV		 145 uq = (struct drm_unique){
146 .unique_len = uq32.unique_len,
147 .unique = compat_ptr(uq32.unique),
148 };
9a186645 149
75426367 150 err = drm_ioctl_kernel(file, drm_getunique, &uq, 0);
9a186645
DA		 151 if (err)
152 return err;
153
17e3dade 154 uq32.unique_len = uq.unique_len;
b5e89ed5 155 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
9a186645
DA		 156 return -EFAULT;
157 return 0;
158}
159
160static int compat_drm_setunique(struct file *file, unsigned int cmd,
161 unsigned long arg)
162{
56c275cc
AV		 163 /* it's dead */
164 return -EINVAL;
9a186645
DA		 165}
166
61ae2270 167#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645 168typedef struct drm_map32 {
2640981f
DV		 169 u32 offset; /* Requested physical address (0 for SAREA) */
170 u32 size; /* Requested physical size (bytes) */
171 enum drm_map_type type; /* Type of memory to map */
172 enum drm_map_flags flags; /* Flags */
173 u32 handle; /* User-space: "Handle" to pass to mmap() */
174 int mtrr; /* MTRR slot used */
9a186645
DA		 175} drm_map32_t;
176
177static int compat_drm_getmap(struct file *file, unsigned int cmd,
178 unsigned long arg)
179{
180 drm_map32_t __user *argp = (void __user *)arg;
181 drm_map32_t m32;
8c4fe499
AV		 182 struct drm_map map;
183 int err;
9a186645 184
8c4fe499 185 if (copy_from_user(&m32, argp, sizeof(m32)))
9a186645
DA		 186 return -EFAULT;
187
8c4fe499 188 map.offset = m32.offset;
75426367 189 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, 0);
9a186645
DA		 190 if (err)
191 return err;
192
8c4fe499
AV		 193 m32.offset = map.offset;
194 m32.size = map.size;
195 m32.type = map.type;
196 m32.flags = map.flags;
e552f085 197 m32.handle = ptr_to_compat((void __user *)map.handle);
8c4fe499 198 m32.mtrr = map.mtrr;
9a186645
DA		 199 if (copy_to_user(argp, &m32, sizeof(m32)))
200 return -EFAULT;
201 return 0;
202
203}
204
205static int compat_drm_addmap(struct file *file, unsigned int cmd,
206 unsigned long arg)
207{
208 drm_map32_t __user *argp = (void __user *)arg;
209 drm_map32_t m32;
b36180a3 210 struct drm_map map;
9a186645 211 int err;
9a186645
DA		 212
213 if (copy_from_user(&m32, argp, sizeof(m32)))
214 return -EFAULT;
215
b36180a3
AV		 216 map.offset = m32.offset;
217 map.size = m32.size;
218 map.type = m32.type;
219 map.flags = m32.flags;
9a186645 220
b36180a3
AV		 221 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
222 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 223 if (err)
224 return err;
225
b36180a3
AV		 226 m32.offset = map.offset;
227 m32.mtrr = map.mtrr;
e552f085 228 m32.handle = ptr_to_compat((void __user *)map.handle);
b36180a3 229 if (map.handle != compat_ptr(m32.handle))
499447db 230 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
b36180a3 231 map.handle, m32.type, m32.offset);
9a186645
DA		 232
233 if (copy_to_user(argp, &m32, sizeof(m32)))
234 return -EFAULT;
235
236 return 0;
237}
238
239static int compat_drm_rmmap(struct file *file, unsigned int cmd,
240 unsigned long arg)
241{
242 drm_map32_t __user *argp = (void __user *)arg;
6113252d 243 struct drm_map map;
9a186645
DA		 244 u32 handle;
245
246 if (get_user(handle, &argp->handle))
247 return -EFAULT;
6113252d
AV		 248 map.handle = compat_ptr(handle);
249 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
9a186645 250}
61ae2270 251#endif
9a186645
DA		 252
253typedef struct drm_client32 {
2640981f
DV		 254 int idx; /* Which client desired? */
255 int auth; /* Is client authenticated? */
256 u32 pid; /* Process ID */
257 u32 uid; /* User ID */
258 u32 magic; /* Magic */
259 u32 iocs; /* Ioctl count */
9a186645
DA		 260} drm_client32_t;
261
262static int compat_drm_getclient(struct file *file, unsigned int cmd,
263 unsigned long arg)
264{
265 drm_client32_t c32;
266 drm_client32_t __user *argp = (void __user *)arg;
9e92662d
AV		 267 struct drm_client client;
268 int err;
9a186645 269
9e92662d 270 if (copy_from_user(&c32, argp, sizeof(c32)))
9a186645
DA		 271 return -EFAULT;
272
de066e11
DV		 273 memset(&client, 0, sizeof(client));
274
9e92662d 275 client.idx = c32.idx;
9a186645 276
75426367 277 err = drm_ioctl_kernel(file, drm_getclient, &client, 0);
9a186645
DA		 278 if (err)
279 return err;
280
9e92662d
AV		 281 c32.idx = client.idx;
282 c32.auth = client.auth;
283 c32.pid = client.pid;
284 c32.uid = client.uid;
285 c32.magic = client.magic;
286 c32.iocs = client.iocs;
9a186645
DA		 287
288 if (copy_to_user(argp, &c32, sizeof(c32)))
289 return -EFAULT;
290 return 0;
291}
292
293typedef struct drm_stats32 {
294 u32 count;
295 struct {
296 u32 value;
ff4135ae 297 enum drm_stat_type type;
9a186645
DA		 298 } data[15];
299} drm_stats32_t;
300
301static int compat_drm_getstats(struct file *file, unsigned int cmd,
302 unsigned long arg)
303{
9a186645 304 drm_stats32_t __user *argp = (void __user *)arg;
8547ee9d 305 int err;
9a186645 306
75426367 307 err = drm_ioctl_kernel(file, drm_noop, NULL, 0);
9a186645
DA		 308 if (err)
309 return err;
310
8547ee9d 311 if (clear_user(argp, sizeof(drm_stats32_t)))
9a186645
DA		 312 return -EFAULT;
313 return 0;
314}
315
61ae2270 316#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645 317typedef struct drm_buf_desc32 {
2640981f
DV		 318 int count; /* Number of buffers of this size */
319 int size; /* Size in bytes */
320 int low_mark; /* Low water mark */
321 int high_mark; /* High water mark */
b5e89ed5 322 int flags;
2640981f 323 u32 agp_start; /* Start address in the AGP aperture */
9a186645
DA		 324} drm_buf_desc32_t;
325
326static int compat_drm_addbufs(struct file *file, unsigned int cmd,
327 unsigned long arg)
328{
329 drm_buf_desc32_t __user *argp = (void __user *)arg;
ff22ff9e
AV		 330 drm_buf_desc32_t desc32;
331 struct drm_buf_desc desc;
9a186645 332 int err;
9a186645 333
ff22ff9e 334 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
9a186645
DA		 335 return -EFAULT;
336
ff22ff9e
AV		 337 desc = (struct drm_buf_desc){
338 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
339 desc32.flags, desc32.agp_start
340 };
9a186645 341
ff22ff9e
AV		 342 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
343 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 344 if (err)
345 return err;
346
ff22ff9e
AV		 347 desc32 = (drm_buf_desc32_t){
348 desc.count, desc.size, desc.low_mark, desc.high_mark,
349 desc.flags, desc.agp_start
350 };
351 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
9a186645
DA		 352 return -EFAULT;
353
354 return 0;
355}
356
357static int compat_drm_markbufs(struct file *file, unsigned int cmd,
358 unsigned long arg)
359{
360 drm_buf_desc32_t b32;
361 drm_buf_desc32_t __user *argp = (void __user *)arg;
b87b786b 362 struct drm_buf_desc buf;
9a186645
DA		 363
364 if (copy_from_user(&b32, argp, sizeof(b32)))
365 return -EFAULT;
366
dbae740e
AV		 367 buf.size = b32.size;
368 buf.low_mark = b32.low_mark;
369 buf.high_mark = b32.high_mark;
9a186645 370
dbae740e
AV		 371 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
372 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 373}
374
375typedef struct drm_buf_info32 {
b5e89ed5
DA		 376 int count; /**< Entries in list */
377 u32 list;
9a186645
DA		 378} drm_buf_info32_t;
379
5c7640ab
AV		 380static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
381{
382 drm_buf_info32_t *request = data;
383 drm_buf_desc32_t __user *to = compat_ptr(request->list);
384 drm_buf_desc32_t v = {.count = from->buf_count,
385 .size = from->buf_size,
386 .low_mark = from->low_mark,
387 .high_mark = from->high_mark};
74b67efa
DC		 388
389 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags)))
390 return -EFAULT;
391 return 0;
5c7640ab
AV		 392}
393
394static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
395 struct drm_file *file_priv)
396{
397 drm_buf_info32_t *request = data;
948de842 398
5c7640ab
AV		 399 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
400}
401
9a186645
DA		 402static int compat_drm_infobufs(struct file *file, unsigned int cmd,
403 unsigned long arg)
404{
405 drm_buf_info32_t req32;
406 drm_buf_info32_t __user *argp = (void __user *)arg;
5c7640ab 407 int err;
9a186645
DA		 408
409 if (copy_from_user(&req32, argp, sizeof(req32)))
410 return -EFAULT;
411
5c7640ab
AV		 412 if (req32.count < 0)
413 req32.count = 0;
9a186645 414
5c7640ab 415 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
9a186645
DA		 416 if (err)
417 return err;
418
5c7640ab 419 if (put_user(req32.count, &argp->count))
9a186645
DA		 420 return -EFAULT;
421
422 return 0;
423}
424
425typedef struct drm_buf_pub32 {
b5e89ed5
DA		 426 int idx; /**< Index into the master buffer list */
427 int total; /**< Buffer size */
428 int used; /**< Amount of buffer in use (for DMA) */
429 u32 address; /**< Address of buffer */
9a186645
DA		 430} drm_buf_pub32_t;
431
432typedef struct drm_buf_map32 {
b5e89ed5
DA		 433 int count; /**< Length of the buffer list */
434 u32 virtual; /**< Mmap'd area in user-virtual */
435 u32 list; /**< Buffer information */
9a186645
DA		 436} drm_buf_map32_t;
437
87d3ce11
AV		 438static int map_one_buf32(void *data, int idx, unsigned long virtual,
439 struct drm_buf *buf)
440{
441 drm_buf_map32_t *request = data;
442 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
443 drm_buf_pub32_t v;
444
445 v.idx = buf->idx;
446 v.total = buf->total;
447 v.used = 0;
448 v.address = virtual + buf->offset;
449 if (copy_to_user(to, &v, sizeof(v)))
450 return -EFAULT;
451 return 0;
452}
453
454static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
455 struct drm_file *file_priv)
456{
457 drm_buf_map32_t *request = data;
458 void __user *v;
459 int err = __drm_legacy_mapbufs(dev, data, &request->count,
460 &v, map_one_buf32,
461 file_priv);
462 request->virtual = ptr_to_compat(v);
463 return err;
464}
465
9a186645
DA		 466static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
467 unsigned long arg)
468{
469 drm_buf_map32_t __user *argp = (void __user *)arg;
470 drm_buf_map32_t req32;
87d3ce11 471 int err;
9a186645
DA		 472
473 if (copy_from_user(&req32, argp, sizeof(req32)))
474 return -EFAULT;
87d3ce11 475 if (req32.count < 0)
9a186645 476 return -EINVAL;
9a186645 477
87d3ce11 478 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
9a186645
DA		 479 if (err)
480 return err;
481
87d3ce11
AV		 482 if (put_user(req32.count, &argp->count)
483 || put_user(req32.virtual, &argp->virtual))
9a186645
DA		 484 return -EFAULT;
485
486 return 0;
487}
488
489typedef struct drm_buf_free32 {
b5e89ed5
DA		 490 int count;
491 u32 list;
9a186645
DA		 492} drm_buf_free32_t;
493
494static int compat_drm_freebufs(struct file *file, unsigned int cmd,
495 unsigned long arg)
496{
497 drm_buf_free32_t req32;
8c9e4cfb 498 struct drm_buf_free request;
9a186645
DA		 499 drm_buf_free32_t __user *argp = (void __user *)arg;
500
501 if (copy_from_user(&req32, argp, sizeof(req32)))
502 return -EFAULT;
503
8c9e4cfb
AV		 504 request.count = req32.count;
505 request.list = compat_ptr(req32.list);
506 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
9a186645
DA		 507}
508
509typedef struct drm_ctx_priv_map32 {
b5e89ed5
DA		 510 unsigned int ctx_id; /**< Context requesting private mapping */
511 u32 handle; /**< Handle of map */
9a186645
DA		 512} drm_ctx_priv_map32_t;
513
514static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
515 unsigned long arg)
516{
517 drm_ctx_priv_map32_t req32;
7900c600 518 struct drm_ctx_priv_map request;
9a186645
DA		 519 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
520
521 if (copy_from_user(&req32, argp, sizeof(req32)))
522 return -EFAULT;
523
7900c600
AV		 524 request.ctx_id = req32.ctx_id;
525 request.handle = compat_ptr(req32.handle);
526 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
527 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 528}
529
530static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
531 unsigned long arg)
532{
d7631e30
AV		 533 struct drm_ctx_priv_map req;
534 drm_ctx_priv_map32_t req32;
9a186645
DA		 535 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
536 int err;
9a186645 537
d7631e30 538 if (copy_from_user(&req32, argp, sizeof(req32)))
9a186645
DA		 539 return -EFAULT;
540
d7631e30
AV		 541 req.ctx_id = req32.ctx_id;
542 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
9a186645
DA		 543 if (err)
544 return err;
545
e552f085 546 req32.handle = ptr_to_compat((void __user *)req.handle);
d7631e30 547 if (copy_to_user(argp, &req32, sizeof(req32)))
9a186645
DA		 548 return -EFAULT;
549
550 return 0;
551}
552
553typedef struct drm_ctx_res32 {
b5e89ed5
DA		 554 int count;
555 u32 contexts;
9a186645
DA		 556} drm_ctx_res32_t;
557
558static int compat_drm_resctx(struct file *file, unsigned int cmd,
559 unsigned long arg)
560{
561 drm_ctx_res32_t __user *argp = (void __user *)arg;
562 drm_ctx_res32_t res32;
9e075680 563 struct drm_ctx_res res;
9a186645
DA		 564 int err;
565
566 if (copy_from_user(&res32, argp, sizeof(res32)))
567 return -EFAULT;
568
9e075680
AV		 569 res.count = res32.count;
570 res.contexts = compat_ptr(res32.contexts);
571 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
9a186645
DA		 572 if (err)
573 return err;
574
9e075680
AV		 575 res32.count = res.count;
576 if (copy_to_user(argp, &res32, sizeof(res32)))
9a186645
DA		 577 return -EFAULT;
578
579 return 0;
580}
581
582typedef struct drm_dma32 {
b5e89ed5
DA		 583 int context; /**< Context handle */
584 int send_count; /**< Number of buffers to send */
585 u32 send_indices; /**< List of handles to buffers */
586 u32 send_sizes; /**< Lengths of data to send */
ff4135ae 587 enum drm_dma_flags flags; /**< Flags */
b5e89ed5
DA		 588 int request_count; /**< Number of buffers requested */
589 int request_size; /**< Desired size for buffers */
590 u32 request_indices; /**< Buffer information */
591 u32 request_sizes;
592 int granted_count; /**< Number of buffers granted */
9a186645
DA		 593} drm_dma32_t;
594
595static int compat_drm_dma(struct file *file, unsigned int cmd,
596 unsigned long arg)
597{
598 drm_dma32_t d32;
b5e89ed5 599 drm_dma32_t __user *argp = (void __user *)arg;
c6f08966 600 struct drm_dma d;
9a186645
DA		 601 int err;
602
603 if (copy_from_user(&d32, argp, sizeof(d32)))
604 return -EFAULT;
605
c6f08966
AV		 606 d.context = d32.context;
607 d.send_count = d32.send_count;
608 d.send_indices = compat_ptr(d32.send_indices);
609 d.send_sizes = compat_ptr(d32.send_sizes);
610 d.flags = d32.flags;
611 d.request_count = d32.request_count;
612 d.request_indices = compat_ptr(d32.request_indices);
613 d.request_sizes = compat_ptr(d32.request_sizes);
614 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
9a186645
DA		 615 if (err)
616 return err;
617
c6f08966
AV		 618 if (put_user(d.request_size, &argp->request_size)
619 || put_user(d.granted_count, &argp->granted_count))
9a186645
DA		 620 return -EFAULT;
621
622 return 0;
623}
61ae2270 624#endif
9a186645 625
a7fb8a23 626#if IS_ENABLED(CONFIG_AGP)
9a186645
DA		 627typedef struct drm_agp_mode32 {
628 u32 mode; /**< AGP mode */
629} drm_agp_mode32_t;
630
631static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
632 unsigned long arg)
633{
634 drm_agp_mode32_t __user *argp = (void __user *)arg;
e92673ed 635 struct drm_agp_mode mode;
9a186645 636
e92673ed 637 if (get_user(mode.mode, &argp->mode))
9a186645
DA		 638 return -EFAULT;
639
e92673ed
AV		 640 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
641 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 642}
643
644typedef struct drm_agp_info32 {
b5e89ed5
DA		 645 int agp_version_major;
646 int agp_version_minor;
647 u32 mode;
648 u32 aperture_base; /* physical address */
649 u32 aperture_size; /* bytes */
650 u32 memory_allowed; /* bytes */
651 u32 memory_used;
652
653 /* PCI information */
9a186645
DA		 654 unsigned short id_vendor;
655 unsigned short id_device;
656} drm_agp_info32_t;
657
658static int compat_drm_agp_info(struct file *file, unsigned int cmd,
659 unsigned long arg)
660{
661 drm_agp_info32_t __user *argp = (void __user *)arg;
662 drm_agp_info32_t i32;
e92673ed 663 struct drm_agp_info info;
9a186645
DA		 664 int err;
665
e92673ed 666 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
9a186645
DA		 667 if (err)
668 return err;
669
e92673ed
AV		 670 i32.agp_version_major = info.agp_version_major;
671 i32.agp_version_minor = info.agp_version_minor;
672 i32.mode = info.mode;
673 i32.aperture_base = info.aperture_base;
674 i32.aperture_size = info.aperture_size;
675 i32.memory_allowed = info.memory_allowed;
676 i32.memory_used = info.memory_used;
677 i32.id_vendor = info.id_vendor;
678 i32.id_device = info.id_device;
9a186645
DA		 679 if (copy_to_user(argp, &i32, sizeof(i32)))
680 return -EFAULT;
681
682 return 0;
683}
684
685typedef struct drm_agp_buffer32 {
686 u32 size; /**< In bytes -- will round to page boundary */
687 u32 handle; /**< Used for binding / unbinding */
688 u32 type; /**< Type of memory to allocate */
b5e89ed5 689 u32 physical; /**< Physical used by i810 */
9a186645
DA		 690} drm_agp_buffer32_t;
691
692static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
693 unsigned long arg)
694{
695 drm_agp_buffer32_t __user *argp = (void __user *)arg;
696 drm_agp_buffer32_t req32;
e92673ed 697 struct drm_agp_buffer request;
9a186645
DA		 698 int err;
699
700 if (copy_from_user(&req32, argp, sizeof(req32)))
701 return -EFAULT;
702
e92673ed
AV		 703 request.size = req32.size;
704 request.type = req32.type;
705 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
706 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 707 if (err)
708 return err;
709
e92673ed
AV		 710 req32.handle = request.handle;
711 req32.physical = request.physical;
712 if (copy_to_user(argp, &req32, sizeof(req32))) {
713 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
714 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 715 return -EFAULT;
716 }
717
718 return 0;
719}
720
721static int compat_drm_agp_free(struct file *file, unsigned int cmd,
722 unsigned long arg)
723{
724 drm_agp_buffer32_t __user *argp = (void __user *)arg;
e92673ed 725 struct drm_agp_buffer request;
9a186645 726
e92673ed 727 if (get_user(request.handle, &argp->handle))
9a186645
DA		 728 return -EFAULT;
729
e92673ed
AV		 730 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
731 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 732}
733
734typedef struct drm_agp_binding32 {
735 u32 handle; /**< From drm_agp_buffer */
736 u32 offset; /**< In bytes -- will round to page boundary */
737} drm_agp_binding32_t;
738
739static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
740 unsigned long arg)
741{
742 drm_agp_binding32_t __user *argp = (void __user *)arg;
743 drm_agp_binding32_t req32;
e92673ed 744 struct drm_agp_binding request;
9a186645
DA		 745
746 if (copy_from_user(&req32, argp, sizeof(req32)))
747 return -EFAULT;
748
e92673ed
AV		 749 request.handle = req32.handle;
750 request.offset = req32.offset;
751 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
752 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 753}
754
755static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
756 unsigned long arg)
757{
758 drm_agp_binding32_t __user *argp = (void __user *)arg;
e92673ed 759 struct drm_agp_binding request;
9a186645 760
e92673ed 761 if (get_user(request.handle, &argp->handle))
9a186645
DA		 762 return -EFAULT;
763
e92673ed
AV		 764 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
765 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645 766}
a7fb8a23 767#endif /* CONFIG_AGP */
9a186645 768
61ae2270 769#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645
DA		 770typedef struct drm_scatter_gather32 {
771 u32 size; /**< In bytes -- will round to page boundary */
772 u32 handle; /**< Used for mapping / unmapping */
773} drm_scatter_gather32_t;
774
775static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
776 unsigned long arg)
777{
778 drm_scatter_gather32_t __user *argp = (void __user *)arg;
314ed736 779 struct drm_scatter_gather request;
9a186645 780 int err;
9a186645 781
314ed736 782 if (get_user(request.size, &argp->size))
9a186645
DA		 783 return -EFAULT;
784
314ed736
AV		 785 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
786 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 787 if (err)
788 return err;
789
790 /* XXX not sure about the handle conversion here... */
314ed736 791 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
9a186645
DA		 792 return -EFAULT;
793
794 return 0;
795}
796
797static int compat_drm_sg_free(struct file *file, unsigned int cmd,
798 unsigned long arg)
799{
800 drm_scatter_gather32_t __user *argp = (void __user *)arg;
314ed736 801 struct drm_scatter_gather request;
9a186645
DA		 802 unsigned long x;
803
314ed736 804 if (get_user(x, &argp->handle))
9a186645 805 return -EFAULT;
314ed736
AV		 806 request.handle = x << PAGE_SHIFT;
807 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
808 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645 809}
61ae2270 810#endif
9cc73ce2 811#if defined(CONFIG_X86)
49568873
EA		 812typedef struct drm_update_draw32 {
813 drm_drawable_t handle;
814 unsigned int type;
815 unsigned int num;
816 /* 64-bit version has a 32-bit pad here */
817 u64 data; /**< Pointer */
818} __attribute__((packed)) drm_update_draw32_t;
819
820static int compat_drm_update_draw(struct file *file, unsigned int cmd,
821 unsigned long arg)
822{
823 drm_update_draw32_t update32;
948de842 824
49568873
EA		 825 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
826 return -EFAULT;
827
1a36bf1d
AV		 828 return drm_ioctl_kernel(file, drm_noop, NULL,
829 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
49568873 830}
09e40d65 831#endif
49568873 832
9a186645 833struct drm_wait_vblank_request32 {
ff4135ae 834 enum drm_vblank_seq_type type;
9a186645
DA		 835 unsigned int sequence;
836 u32 signal;
837};
838
839struct drm_wait_vblank_reply32 {
ff4135ae 840 enum drm_vblank_seq_type type;
9a186645
DA		 841 unsigned int sequence;
842 s32 tval_sec;
843 s32 tval_usec;
844};
845
846typedef union drm_wait_vblank32 {
847 struct drm_wait_vblank_request32 request;
848 struct drm_wait_vblank_reply32 reply;
849} drm_wait_vblank32_t;
850
851static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
852 unsigned long arg)
853{
854 drm_wait_vblank32_t __user *argp = (void __user *)arg;
855 drm_wait_vblank32_t req32;
d5288c88 856 union drm_wait_vblank req;
9a186645
DA		 857 int err;
858
859 if (copy_from_user(&req32, argp, sizeof(req32)))
860 return -EFAULT;
861
de066e11
DV		 862 memset(&req, 0, sizeof(req));
863
d5288c88
AV		 864 req.request.type = req32.request.type;
865 req.request.sequence = req32.request.sequence;
866 req.request.signal = req32.request.signal;
af055598 867 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
9a186645
DA		 868 if (err)
869 return err;
870
d5288c88
AV		 871 req32.reply.type = req.reply.type;
872 req32.reply.sequence = req.reply.sequence;
873 req32.reply.tval_sec = req.reply.tval_sec;
874 req32.reply.tval_usec = req.reply.tval_usec;
9a186645
DA		 875 if (copy_to_user(argp, &req32, sizeof(req32)))
876 return -EFAULT;
877
878 return 0;
879}
880
9cc73ce2 881#if defined(CONFIG_X86)
c631d5f9
TU		 882typedef struct drm_mode_fb_cmd232 {
883 u32 fb_id;
884 u32 width;
885 u32 height;
886 u32 pixel_format;
887 u32 flags;
888 u32 handles[4];
889 u32 pitches[4];
890 u32 offsets[4];
891 u64 modifier[4];
892} __attribute__((packed)) drm_mode_fb_cmd232_t;
893
894static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
895 unsigned long arg)
896{
897 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
b87b786b 898 struct drm_mode_fb_cmd2 req64;
c631d5f9
TU		 899 int err;
900
de066e11
DV		 901 memset(&req64, 0, sizeof(req64));
902
d6c56613
AV		 903 if (copy_from_user(&req64, argp,
904 offsetof(drm_mode_fb_cmd232_t, modifier)))
c631d5f9
TU		 905 return -EFAULT;
906
d6c56613
AV		 907 if (copy_from_user(&req64.modifier, &argp->modifier,
908 sizeof(req64.modifier)))
c631d5f9
TU		 909 return -EFAULT;
910
75426367 911 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64, 0);
c631d5f9
TU		 912 if (err)
913 return err;
914
d6c56613 915 if (put_user(req64.fb_id, &argp->fb_id))
c631d5f9
TU		 916 return -EFAULT;
917
918 return 0;
919}
a988588b 920#endif
c631d5f9 921
9f43e542
AV		 922static struct {
923 drm_ioctl_compat_t *fn;
924 char *name;
925} drm_compat_ioctls[] = {
ff22ff9e 926#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
012c6741 927 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
17e3dade 928 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
61ae2270 929#if IS_ENABLED(CONFIG_DRM_LEGACY)
8c4fe499 930 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
61ae2270 931#endif
9e92662d 932 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
8547ee9d 933 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
56c275cc 934 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
61ae2270 935#if IS_ENABLED(CONFIG_DRM_LEGACY)
b36180a3 936 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
ff22ff9e 937 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
dbae740e 938 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
5c7640ab 939 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
87d3ce11 940 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
8c9e4cfb 941 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
6113252d 942 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
7900c600 943 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
d7631e30 944 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
9e075680 945 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
c6f08966 946 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
61ae2270 947#endif
a7fb8a23 948#if IS_ENABLED(CONFIG_AGP)
e92673ed
AV		 949 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
950 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
951 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
952 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
953 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
954 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
9a186645 955#endif
61ae2270 956#if IS_ENABLED(CONFIG_DRM_LEGACY)
314ed736
AV		 957 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
958 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
61ae2270 959#endif
09e40d65 960#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1a36bf1d 961 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
09e40d65 962#endif
d5288c88 963 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
a988588b 964#if defined(CONFIG_X86) || defined(CONFIG_IA64)
d6c56613 965 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
a988588b 966#endif
9a186645
DA		 967};
968
969/**
2640981f
DV		 970 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
971 * @filp: file this ioctl is called on
972 * @cmd: ioctl cmd number
973 * @arg: user argument
974 *
975 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
976 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
977 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
978 * botched IOCTL itself, it must handle those by wrapping this function.
9a186645 979 *
2640981f
DV		 980 * Returns:
981 * Zero on success, negative error code on failure.
9a186645
DA		 982 */
983long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
984{
985 unsigned int nr = DRM_IOCTL_NR(cmd);
88e3cb07 986 struct drm_file *file_priv = filp->private_data;
9a186645
DA		 987 drm_ioctl_compat_t *fn;
988 int ret;
989
7ffa05e0
IR		 990 /* Assume that ioctls without an explicit compat routine will just
991 * work. This may not always be a good assumption, but it's better
992 * than always failing.
993 */
3d77461e 994 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
ed8b6704 995 return drm_ioctl(filp, cmd, arg);
9a186645 996
9f43e542
AV		 997 fn = drm_compat_ioctls[nr].fn;
998 if (!fn)
999 return drm_ioctl(filp, cmd, arg);
9a186645 1000
5a2ba992
EV		 1001 DRM_DEBUG("comm=\"%s\", pid=%d, dev=0x%lx, auth=%d, %s\n",
1002 current->comm, task_pid_nr(current),
88e3cb07
AV		 1003 (long)old_encode_dev(file_priv->minor->kdev->devt),
1004 file_priv->authenticated,
1005 drm_compat_ioctls[nr].name);
1006 ret = (*fn)(filp, cmd, arg);
1007 if (ret)
1008 DRM_DEBUG("ret = %d\n", ret);
9a186645
DA		 1009 return ret;
1010}
1011EXPORT_SYMBOL(drm_compat_ioctl);
Linux 6.x block layer and io_uring tree(s)