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drm: allow removal of legacy codepaths (v4.1)
[mirror_ubuntu-jammy-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"
d6c56613 37#include "drm_crtc_internal.h"
9a186645
DA		 38
39#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
40#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
41#define DRM_IOCTL_GET_MAP32 DRM_IOWR(0x04, drm_map32_t)
42#define DRM_IOCTL_GET_CLIENT32 DRM_IOWR(0x05, drm_client32_t)
43#define DRM_IOCTL_GET_STATS32 DRM_IOR( 0x06, drm_stats32_t)
44
45#define DRM_IOCTL_SET_UNIQUE32 DRM_IOW( 0x10, drm_unique32_t)
46#define DRM_IOCTL_ADD_MAP32 DRM_IOWR(0x15, drm_map32_t)
47#define DRM_IOCTL_ADD_BUFS32 DRM_IOWR(0x16, drm_buf_desc32_t)
48#define DRM_IOCTL_MARK_BUFS32 DRM_IOW( 0x17, drm_buf_desc32_t)
49#define DRM_IOCTL_INFO_BUFS32 DRM_IOWR(0x18, drm_buf_info32_t)
50#define DRM_IOCTL_MAP_BUFS32 DRM_IOWR(0x19, drm_buf_map32_t)
51#define DRM_IOCTL_FREE_BUFS32 DRM_IOW( 0x1a, drm_buf_free32_t)
52
53#define DRM_IOCTL_RM_MAP32 DRM_IOW( 0x1b, drm_map32_t)
54
55#define DRM_IOCTL_SET_SAREA_CTX32 DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
56#define DRM_IOCTL_GET_SAREA_CTX32 DRM_IOWR(0x1d, drm_ctx_priv_map32_t)
57
58#define DRM_IOCTL_RES_CTX32 DRM_IOWR(0x26, drm_ctx_res32_t)
59#define DRM_IOCTL_DMA32 DRM_IOWR(0x29, drm_dma32_t)
60
61#define DRM_IOCTL_AGP_ENABLE32 DRM_IOW( 0x32, drm_agp_mode32_t)
62#define DRM_IOCTL_AGP_INFO32 DRM_IOR( 0x33, drm_agp_info32_t)
63#define DRM_IOCTL_AGP_ALLOC32 DRM_IOWR(0x34, drm_agp_buffer32_t)
64#define DRM_IOCTL_AGP_FREE32 DRM_IOW( 0x35, drm_agp_buffer32_t)
65#define DRM_IOCTL_AGP_BIND32 DRM_IOW( 0x36, drm_agp_binding32_t)
66#define DRM_IOCTL_AGP_UNBIND32 DRM_IOW( 0x37, drm_agp_binding32_t)
67
68#define DRM_IOCTL_SG_ALLOC32 DRM_IOW( 0x38, drm_scatter_gather32_t)
69#define DRM_IOCTL_SG_FREE32 DRM_IOW( 0x39, drm_scatter_gather32_t)
70
49568873
EA		 71#define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
72
9a186645
DA		 73#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
74
c631d5f9
TU		 75#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
76
9a186645 77typedef struct drm_version_32 {
2640981f
DV		 78 int version_major; /* Major version */
79 int version_minor; /* Minor version */
80 int version_patchlevel; /* Patch level */
81 u32 name_len; /* Length of name buffer */
82 u32 name; /* Name of driver */
83 u32 date_len; /* Length of date buffer */
84 u32 date; /* User-space buffer to hold date */
85 u32 desc_len; /* Length of desc buffer */
86 u32 desc; /* User-space buffer to hold desc */
9a186645
DA		 87} drm_version32_t;
88
89static int compat_drm_version(struct file *file, unsigned int cmd,
90 unsigned long arg)
91{
92 drm_version32_t v32;
012c6741 93 struct drm_version v;
9a186645
DA		 94 int err;
95
b5e89ed5 96 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
9a186645
DA		 97 return -EFAULT;
98
012c6741
AV		 99 v = (struct drm_version) {
100 .name_len = v32.name_len,
101 .name = compat_ptr(v32.name),
102 .date_len = v32.date_len,
103 .date = compat_ptr(v32.date),
104 .desc_len = v32.desc_len,
105 .desc = compat_ptr(v32.desc),
106 };
107 err = drm_ioctl_kernel(file, drm_version, &v,
5bb562f8 108 DRM_UNLOCKED|DRM_RENDER_ALLOW);
9a186645
DA		 109 if (err)
110 return err;
111
012c6741
AV		 112 v32.version_major = v.version_major;
113 v32.version_minor = v.version_minor;
114 v32.version_patchlevel = v.version_patchlevel;
266530b3
JC		 115 v32.name_len = v.name_len;
116 v32.date_len = v.date_len;
117 v32.desc_len = v.desc_len;
b5e89ed5 118 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
9a186645
DA		 119 return -EFAULT;
120 return 0;
121}
122
123typedef struct drm_unique32 {
2640981f
DV		 124 u32 unique_len; /* Length of unique */
125 u32 unique; /* Unique name for driver instantiation */
9a186645
DA		 126} drm_unique32_t;
127
128static int compat_drm_getunique(struct file *file, unsigned int cmd,
129 unsigned long arg)
130{
131 drm_unique32_t uq32;
17e3dade 132 struct drm_unique uq;
9a186645
DA		 133 int err;
134
b5e89ed5 135 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
9a186645 136 return -EFAULT;
17e3dade
AV		 137 uq = (struct drm_unique){
138 .unique_len = uq32.unique_len,
139 .unique = compat_ptr(uq32.unique),
140 };
9a186645 141
17e3dade 142 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
9a186645
DA		 143 if (err)
144 return err;
145
17e3dade 146 uq32.unique_len = uq.unique_len;
b5e89ed5 147 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
9a186645
DA		 148 return -EFAULT;
149 return 0;
150}
151
152static int compat_drm_setunique(struct file *file, unsigned int cmd,
153 unsigned long arg)
154{
56c275cc
AV		 155 /* it's dead */
156 return -EINVAL;
9a186645
DA		 157}
158
61ae2270 159#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645 160typedef struct drm_map32 {
2640981f
DV		 161 u32 offset; /* Requested physical address (0 for SAREA) */
162 u32 size; /* Requested physical size (bytes) */
163 enum drm_map_type type; /* Type of memory to map */
164 enum drm_map_flags flags; /* Flags */
165 u32 handle; /* User-space: "Handle" to pass to mmap() */
166 int mtrr; /* MTRR slot used */
9a186645
DA		 167} drm_map32_t;
168
169static int compat_drm_getmap(struct file *file, unsigned int cmd,
170 unsigned long arg)
171{
172 drm_map32_t __user *argp = (void __user *)arg;
173 drm_map32_t m32;
8c4fe499
AV		 174 struct drm_map map;
175 int err;
9a186645 176
8c4fe499 177 if (copy_from_user(&m32, argp, sizeof(m32)))
9a186645
DA		 178 return -EFAULT;
179
8c4fe499
AV		 180 map.offset = m32.offset;
181 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
9a186645
DA		 182 if (err)
183 return err;
184
8c4fe499
AV		 185 m32.offset = map.offset;
186 m32.size = map.size;
187 m32.type = map.type;
188 m32.flags = map.flags;
e552f085 189 m32.handle = ptr_to_compat((void __user *)map.handle);
8c4fe499 190 m32.mtrr = map.mtrr;
9a186645
DA		 191 if (copy_to_user(argp, &m32, sizeof(m32)))
192 return -EFAULT;
193 return 0;
194
195}
196
197static int compat_drm_addmap(struct file *file, unsigned int cmd,
198 unsigned long arg)
199{
200 drm_map32_t __user *argp = (void __user *)arg;
201 drm_map32_t m32;
b36180a3 202 struct drm_map map;
9a186645 203 int err;
9a186645
DA		 204
205 if (copy_from_user(&m32, argp, sizeof(m32)))
206 return -EFAULT;
207
b36180a3
AV		 208 map.offset = m32.offset;
209 map.size = m32.size;
210 map.type = m32.type;
211 map.flags = m32.flags;
9a186645 212
b36180a3
AV		 213 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
214 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 215 if (err)
216 return err;
217
b36180a3
AV		 218 m32.offset = map.offset;
219 m32.mtrr = map.mtrr;
e552f085 220 m32.handle = ptr_to_compat((void __user *)map.handle);
b36180a3 221 if (map.handle != compat_ptr(m32.handle))
499447db 222 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
b36180a3 223 map.handle, m32.type, m32.offset);
9a186645
DA		 224
225 if (copy_to_user(argp, &m32, sizeof(m32)))
226 return -EFAULT;
227
228 return 0;
229}
230
231static int compat_drm_rmmap(struct file *file, unsigned int cmd,
232 unsigned long arg)
233{
234 drm_map32_t __user *argp = (void __user *)arg;
6113252d 235 struct drm_map map;
9a186645
DA		 236 u32 handle;
237
238 if (get_user(handle, &argp->handle))
239 return -EFAULT;
6113252d
AV		 240 map.handle = compat_ptr(handle);
241 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
9a186645 242}
61ae2270 243#endif
9a186645
DA		 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
61ae2270 306#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645 307typedef struct drm_buf_desc32 {
2640981f
DV		 308 int count; /* Number of buffers of this size */
309 int size; /* Size in bytes */
310 int low_mark; /* Low water mark */
311 int high_mark; /* High water mark */
b5e89ed5 312 int flags;
2640981f 313 u32 agp_start; /* Start address in the AGP aperture */
9a186645
DA		 314} drm_buf_desc32_t;
315
316static int compat_drm_addbufs(struct file *file, unsigned int cmd,
317 unsigned long arg)
318{
319 drm_buf_desc32_t __user *argp = (void __user *)arg;
ff22ff9e
AV		 320 drm_buf_desc32_t desc32;
321 struct drm_buf_desc desc;
9a186645 322 int err;
9a186645 323
ff22ff9e 324 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
9a186645
DA		 325 return -EFAULT;
326
ff22ff9e
AV		 327 desc = (struct drm_buf_desc){
328 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
329 desc32.flags, desc32.agp_start
330 };
9a186645 331
ff22ff9e
AV		 332 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
333 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 334 if (err)
335 return err;
336
ff22ff9e
AV		 337 desc32 = (drm_buf_desc32_t){
338 desc.count, desc.size, desc.low_mark, desc.high_mark,
339 desc.flags, desc.agp_start
340 };
341 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
9a186645
DA		 342 return -EFAULT;
343
344 return 0;
345}
346
347static int compat_drm_markbufs(struct file *file, unsigned int cmd,
348 unsigned long arg)
349{
350 drm_buf_desc32_t b32;
351 drm_buf_desc32_t __user *argp = (void __user *)arg;
b87b786b 352 struct drm_buf_desc buf;
9a186645
DA		 353
354 if (copy_from_user(&b32, argp, sizeof(b32)))
355 return -EFAULT;
356
dbae740e
AV		 357 buf.size = b32.size;
358 buf.low_mark = b32.low_mark;
359 buf.high_mark = b32.high_mark;
9a186645 360
dbae740e
AV		 361 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
362 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 363}
364
365typedef struct drm_buf_info32 {
b5e89ed5
DA		 366 int count; /**< Entries in list */
367 u32 list;
9a186645
DA		 368} drm_buf_info32_t;
369
5c7640ab
AV		 370static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
371{
372 drm_buf_info32_t *request = data;
373 drm_buf_desc32_t __user *to = compat_ptr(request->list);
374 drm_buf_desc32_t v = {.count = from->buf_count,
375 .size = from->buf_size,
376 .low_mark = from->low_mark,
377 .high_mark = from->high_mark};
378 return copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags));
379}
380
381static int drm_legacy_infobufs32(struct drm_device *dev, void *data,
382 struct drm_file *file_priv)
383{
384 drm_buf_info32_t *request = data;
385 return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf32);
386}
387
9a186645
DA		 388static int compat_drm_infobufs(struct file *file, unsigned int cmd,
389 unsigned long arg)
390{
391 drm_buf_info32_t req32;
392 drm_buf_info32_t __user *argp = (void __user *)arg;
5c7640ab 393 int err;
9a186645
DA		 394
395 if (copy_from_user(&req32, argp, sizeof(req32)))
396 return -EFAULT;
397
5c7640ab
AV		 398 if (req32.count < 0)
399 req32.count = 0;
9a186645 400
5c7640ab 401 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
9a186645
DA		 402 if (err)
403 return err;
404
5c7640ab 405 if (put_user(req32.count, &argp->count))
9a186645
DA		 406 return -EFAULT;
407
408 return 0;
409}
410
411typedef struct drm_buf_pub32 {
b5e89ed5
DA		 412 int idx; /**< Index into the master buffer list */
413 int total; /**< Buffer size */
414 int used; /**< Amount of buffer in use (for DMA) */
415 u32 address; /**< Address of buffer */
9a186645
DA		 416} drm_buf_pub32_t;
417
418typedef struct drm_buf_map32 {
b5e89ed5
DA		 419 int count; /**< Length of the buffer list */
420 u32 virtual; /**< Mmap'd area in user-virtual */
421 u32 list; /**< Buffer information */
9a186645
DA		 422} drm_buf_map32_t;
423
87d3ce11
AV		 424static int map_one_buf32(void *data, int idx, unsigned long virtual,
425 struct drm_buf *buf)
426{
427 drm_buf_map32_t *request = data;
428 drm_buf_pub32_t __user *to = compat_ptr(request->list) + idx;
429 drm_buf_pub32_t v;
430
431 v.idx = buf->idx;
432 v.total = buf->total;
433 v.used = 0;
434 v.address = virtual + buf->offset;
435 if (copy_to_user(to, &v, sizeof(v)))
436 return -EFAULT;
437 return 0;
438}
439
440static int drm_legacy_mapbufs32(struct drm_device *dev, void *data,
441 struct drm_file *file_priv)
442{
443 drm_buf_map32_t *request = data;
444 void __user *v;
445 int err = __drm_legacy_mapbufs(dev, data, &request->count,
446 &v, map_one_buf32,
447 file_priv);
448 request->virtual = ptr_to_compat(v);
449 return err;
450}
451
9a186645
DA		 452static int compat_drm_mapbufs(struct file *file, unsigned int cmd,
453 unsigned long arg)
454{
455 drm_buf_map32_t __user *argp = (void __user *)arg;
456 drm_buf_map32_t req32;
87d3ce11 457 int err;
9a186645
DA		 458
459 if (copy_from_user(&req32, argp, sizeof(req32)))
460 return -EFAULT;
87d3ce11 461 if (req32.count < 0)
9a186645 462 return -EINVAL;
9a186645 463
87d3ce11 464 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
9a186645
DA		 465 if (err)
466 return err;
467
87d3ce11
AV		 468 if (put_user(req32.count, &argp->count)
469 || put_user(req32.virtual, &argp->virtual))
9a186645
DA		 470 return -EFAULT;
471
472 return 0;
473}
474
475typedef struct drm_buf_free32 {
b5e89ed5
DA		 476 int count;
477 u32 list;
9a186645
DA		 478} drm_buf_free32_t;
479
480static int compat_drm_freebufs(struct file *file, unsigned int cmd,
481 unsigned long arg)
482{
483 drm_buf_free32_t req32;
8c9e4cfb 484 struct drm_buf_free request;
9a186645
DA		 485 drm_buf_free32_t __user *argp = (void __user *)arg;
486
487 if (copy_from_user(&req32, argp, sizeof(req32)))
488 return -EFAULT;
489
8c9e4cfb
AV		 490 request.count = req32.count;
491 request.list = compat_ptr(req32.list);
492 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
9a186645
DA		 493}
494
495typedef struct drm_ctx_priv_map32 {
b5e89ed5
DA		 496 unsigned int ctx_id; /**< Context requesting private mapping */
497 u32 handle; /**< Handle of map */
9a186645
DA		 498} drm_ctx_priv_map32_t;
499
500static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
501 unsigned long arg)
502{
503 drm_ctx_priv_map32_t req32;
7900c600 504 struct drm_ctx_priv_map request;
9a186645
DA		 505 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
506
507 if (copy_from_user(&req32, argp, sizeof(req32)))
508 return -EFAULT;
509
7900c600
AV		 510 request.ctx_id = req32.ctx_id;
511 request.handle = compat_ptr(req32.handle);
512 return drm_ioctl_kernel(file, drm_legacy_setsareactx, &request,
513 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 514}
515
516static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
517 unsigned long arg)
518{
d7631e30
AV		 519 struct drm_ctx_priv_map req;
520 drm_ctx_priv_map32_t req32;
9a186645
DA		 521 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
522 int err;
9a186645 523
d7631e30 524 if (copy_from_user(&req32, argp, sizeof(req32)))
9a186645
DA		 525 return -EFAULT;
526
d7631e30
AV		 527 req.ctx_id = req32.ctx_id;
528 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
9a186645
DA		 529 if (err)
530 return err;
531
e552f085 532 req32.handle = ptr_to_compat((void __user *)req.handle);
d7631e30 533 if (copy_to_user(argp, &req32, sizeof(req32)))
9a186645
DA		 534 return -EFAULT;
535
536 return 0;
537}
538
539typedef struct drm_ctx_res32 {
b5e89ed5
DA		 540 int count;
541 u32 contexts;
9a186645
DA		 542} drm_ctx_res32_t;
543
544static int compat_drm_resctx(struct file *file, unsigned int cmd,
545 unsigned long arg)
546{
547 drm_ctx_res32_t __user *argp = (void __user *)arg;
548 drm_ctx_res32_t res32;
9e075680 549 struct drm_ctx_res res;
9a186645
DA		 550 int err;
551
552 if (copy_from_user(&res32, argp, sizeof(res32)))
553 return -EFAULT;
554
9e075680
AV		 555 res.count = res32.count;
556 res.contexts = compat_ptr(res32.contexts);
557 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
9a186645
DA		 558 if (err)
559 return err;
560
9e075680
AV		 561 res32.count = res.count;
562 if (copy_to_user(argp, &res32, sizeof(res32)))
9a186645
DA		 563 return -EFAULT;
564
565 return 0;
566}
567
568typedef struct drm_dma32 {
b5e89ed5
DA		 569 int context; /**< Context handle */
570 int send_count; /**< Number of buffers to send */
571 u32 send_indices; /**< List of handles to buffers */
572 u32 send_sizes; /**< Lengths of data to send */
ff4135ae 573 enum drm_dma_flags flags; /**< Flags */
b5e89ed5
DA		 574 int request_count; /**< Number of buffers requested */
575 int request_size; /**< Desired size for buffers */
576 u32 request_indices; /**< Buffer information */
577 u32 request_sizes;
578 int granted_count; /**< Number of buffers granted */
9a186645
DA		 579} drm_dma32_t;
580
581static int compat_drm_dma(struct file *file, unsigned int cmd,
582 unsigned long arg)
583{
584 drm_dma32_t d32;
b5e89ed5 585 drm_dma32_t __user *argp = (void __user *)arg;
c6f08966 586 struct drm_dma d;
9a186645
DA		 587 int err;
588
589 if (copy_from_user(&d32, argp, sizeof(d32)))
590 return -EFAULT;
591
c6f08966
AV		 592 d.context = d32.context;
593 d.send_count = d32.send_count;
594 d.send_indices = compat_ptr(d32.send_indices);
595 d.send_sizes = compat_ptr(d32.send_sizes);
596 d.flags = d32.flags;
597 d.request_count = d32.request_count;
598 d.request_indices = compat_ptr(d32.request_indices);
599 d.request_sizes = compat_ptr(d32.request_sizes);
600 err = drm_ioctl_kernel(file, drm_legacy_dma_ioctl, &d, DRM_AUTH);
9a186645
DA		 601 if (err)
602 return err;
603
c6f08966
AV		 604 if (put_user(d.request_size, &argp->request_size)
605 || put_user(d.granted_count, &argp->granted_count))
9a186645
DA		 606 return -EFAULT;
607
608 return 0;
609}
61ae2270 610#endif
9a186645 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;
e92673ed 621 struct drm_agp_mode mode;
9a186645 622
e92673ed 623 if (get_user(mode.mode, &argp->mode))
9a186645
DA		 624 return -EFAULT;
625
e92673ed
AV		 626 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
627 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 628}
629
630typedef struct drm_agp_info32 {
b5e89ed5
DA		 631 int agp_version_major;
632 int agp_version_minor;
633 u32 mode;
634 u32 aperture_base; /* physical address */
635 u32 aperture_size; /* bytes */
636 u32 memory_allowed; /* bytes */
637 u32 memory_used;
638
639 /* PCI information */
9a186645
DA		 640 unsigned short id_vendor;
641 unsigned short id_device;
642} drm_agp_info32_t;
643
644static int compat_drm_agp_info(struct file *file, unsigned int cmd,
645 unsigned long arg)
646{
647 drm_agp_info32_t __user *argp = (void __user *)arg;
648 drm_agp_info32_t i32;
e92673ed 649 struct drm_agp_info info;
9a186645
DA		 650 int err;
651
e92673ed 652 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
9a186645
DA		 653 if (err)
654 return err;
655
e92673ed
AV		 656 i32.agp_version_major = info.agp_version_major;
657 i32.agp_version_minor = info.agp_version_minor;
658 i32.mode = info.mode;
659 i32.aperture_base = info.aperture_base;
660 i32.aperture_size = info.aperture_size;
661 i32.memory_allowed = info.memory_allowed;
662 i32.memory_used = info.memory_used;
663 i32.id_vendor = info.id_vendor;
664 i32.id_device = info.id_device;
9a186645
DA		 665 if (copy_to_user(argp, &i32, sizeof(i32)))
666 return -EFAULT;
667
668 return 0;
669}
670
671typedef struct drm_agp_buffer32 {
672 u32 size; /**< In bytes -- will round to page boundary */
673 u32 handle; /**< Used for binding / unbinding */
674 u32 type; /**< Type of memory to allocate */
b5e89ed5 675 u32 physical; /**< Physical used by i810 */
9a186645
DA		 676} drm_agp_buffer32_t;
677
678static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
679 unsigned long arg)
680{
681 drm_agp_buffer32_t __user *argp = (void __user *)arg;
682 drm_agp_buffer32_t req32;
e92673ed 683 struct drm_agp_buffer request;
9a186645
DA		 684 int err;
685
686 if (copy_from_user(&req32, argp, sizeof(req32)))
687 return -EFAULT;
688
e92673ed
AV		 689 request.size = req32.size;
690 request.type = req32.type;
691 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
692 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 693 if (err)
694 return err;
695
e92673ed
AV		 696 req32.handle = request.handle;
697 req32.physical = request.physical;
698 if (copy_to_user(argp, &req32, sizeof(req32))) {
699 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
700 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 701 return -EFAULT;
702 }
703
704 return 0;
705}
706
707static int compat_drm_agp_free(struct file *file, unsigned int cmd,
708 unsigned long arg)
709{
710 drm_agp_buffer32_t __user *argp = (void __user *)arg;
e92673ed 711 struct drm_agp_buffer request;
9a186645 712
e92673ed 713 if (get_user(request.handle, &argp->handle))
9a186645
DA		 714 return -EFAULT;
715
e92673ed
AV		 716 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
717 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 718}
719
720typedef struct drm_agp_binding32 {
721 u32 handle; /**< From drm_agp_buffer */
722 u32 offset; /**< In bytes -- will round to page boundary */
723} drm_agp_binding32_t;
724
725static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
726 unsigned long arg)
727{
728 drm_agp_binding32_t __user *argp = (void __user *)arg;
729 drm_agp_binding32_t req32;
e92673ed 730 struct drm_agp_binding request;
9a186645
DA		 731
732 if (copy_from_user(&req32, argp, sizeof(req32)))
733 return -EFAULT;
734
e92673ed
AV		 735 request.handle = req32.handle;
736 request.offset = req32.offset;
737 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
738 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 739}
740
741static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
742 unsigned long arg)
743{
744 drm_agp_binding32_t __user *argp = (void __user *)arg;
e92673ed 745 struct drm_agp_binding request;
9a186645 746
e92673ed 747 if (get_user(request.handle, &argp->handle))
9a186645
DA		 748 return -EFAULT;
749
e92673ed
AV		 750 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
751 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645 752}
a7fb8a23 753#endif /* CONFIG_AGP */
9a186645 754
61ae2270 755#if IS_ENABLED(CONFIG_DRM_LEGACY)
9a186645
DA		 756typedef struct drm_scatter_gather32 {
757 u32 size; /**< In bytes -- will round to page boundary */
758 u32 handle; /**< Used for mapping / unmapping */
759} drm_scatter_gather32_t;
760
761static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
762 unsigned long arg)
763{
764 drm_scatter_gather32_t __user *argp = (void __user *)arg;
314ed736 765 struct drm_scatter_gather request;
9a186645 766 int err;
9a186645 767
314ed736 768 if (get_user(request.size, &argp->size))
9a186645
DA		 769 return -EFAULT;
770
314ed736
AV		 771 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
772 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645
DA		 773 if (err)
774 return err;
775
776 /* XXX not sure about the handle conversion here... */
314ed736 777 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
9a186645
DA		 778 return -EFAULT;
779
780 return 0;
781}
782
783static int compat_drm_sg_free(struct file *file, unsigned int cmd,
784 unsigned long arg)
785{
786 drm_scatter_gather32_t __user *argp = (void __user *)arg;
314ed736 787 struct drm_scatter_gather request;
9a186645
DA		 788 unsigned long x;
789
314ed736 790 if (get_user(x, &argp->handle))
9a186645 791 return -EFAULT;
314ed736
AV		 792 request.handle = x << PAGE_SHIFT;
793 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
794 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
9a186645 795}
61ae2270 796#endif
9cc73ce2 797#if defined(CONFIG_X86)
49568873
EA		 798typedef struct drm_update_draw32 {
799 drm_drawable_t handle;
800 unsigned int type;
801 unsigned int num;
802 /* 64-bit version has a 32-bit pad here */
803 u64 data; /**< Pointer */
804} __attribute__((packed)) drm_update_draw32_t;
805
806static int compat_drm_update_draw(struct file *file, unsigned int cmd,
807 unsigned long arg)
808{
809 drm_update_draw32_t update32;
49568873
EA		 810 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
811 return -EFAULT;
812
1a36bf1d
AV		 813 return drm_ioctl_kernel(file, drm_noop, NULL,
814 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
49568873 815}
09e40d65 816#endif
49568873 817
9a186645 818struct drm_wait_vblank_request32 {
ff4135ae 819 enum drm_vblank_seq_type type;
9a186645
DA		 820 unsigned int sequence;
821 u32 signal;
822};
823
824struct drm_wait_vblank_reply32 {
ff4135ae 825 enum drm_vblank_seq_type type;
9a186645
DA		 826 unsigned int sequence;
827 s32 tval_sec;
828 s32 tval_usec;
829};
830
831typedef union drm_wait_vblank32 {
832 struct drm_wait_vblank_request32 request;
833 struct drm_wait_vblank_reply32 reply;
834} drm_wait_vblank32_t;
835
836static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
837 unsigned long arg)
838{
839 drm_wait_vblank32_t __user *argp = (void __user *)arg;
840 drm_wait_vblank32_t req32;
d5288c88 841 union drm_wait_vblank req;
9a186645
DA		 842 int err;
843
844 if (copy_from_user(&req32, argp, sizeof(req32)))
845 return -EFAULT;
846
d5288c88
AV		 847 req.request.type = req32.request.type;
848 req.request.sequence = req32.request.sequence;
849 req.request.signal = req32.request.signal;
af055598 850 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
9a186645
DA		 851 if (err)
852 return err;
853
d5288c88
AV		 854 req32.reply.type = req.reply.type;
855 req32.reply.sequence = req.reply.sequence;
856 req32.reply.tval_sec = req.reply.tval_sec;
857 req32.reply.tval_usec = req.reply.tval_usec;
9a186645
DA		 858 if (copy_to_user(argp, &req32, sizeof(req32)))
859 return -EFAULT;
860
861 return 0;
862}
863
9cc73ce2 864#if defined(CONFIG_X86)
c631d5f9
TU		 865typedef struct drm_mode_fb_cmd232 {
866 u32 fb_id;
867 u32 width;
868 u32 height;
869 u32 pixel_format;
870 u32 flags;
871 u32 handles[4];
872 u32 pitches[4];
873 u32 offsets[4];
874 u64 modifier[4];
875} __attribute__((packed)) drm_mode_fb_cmd232_t;
876
877static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
878 unsigned long arg)
879{
880 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
b87b786b 881 struct drm_mode_fb_cmd2 req64;
c631d5f9
TU		 882 int err;
883
d6c56613
AV		 884 if (copy_from_user(&req64, argp,
885 offsetof(drm_mode_fb_cmd232_t, modifier)))
c631d5f9
TU		 886 return -EFAULT;
887
d6c56613
AV		 888 if (copy_from_user(&req64.modifier, &argp->modifier,
889 sizeof(req64.modifier)))
c631d5f9
TU		 890 return -EFAULT;
891
d6c56613 892 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
5bb562f8 893 DRM_UNLOCKED);
c631d5f9
TU		 894 if (err)
895 return err;
896
d6c56613 897 if (put_user(req64.fb_id, &argp->fb_id))
c631d5f9
TU		 898 return -EFAULT;
899
900 return 0;
901}
a988588b 902#endif
c631d5f9 903
9f43e542
AV		 904static struct {
905 drm_ioctl_compat_t *fn;
906 char *name;
907} drm_compat_ioctls[] = {
ff22ff9e 908#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
012c6741 909 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
17e3dade 910 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
61ae2270 911#if IS_ENABLED(CONFIG_DRM_LEGACY)
8c4fe499 912 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
61ae2270 913#endif
9e92662d 914 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
8547ee9d 915 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
56c275cc 916 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
61ae2270 917#if IS_ENABLED(CONFIG_DRM_LEGACY)
b36180a3 918 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
ff22ff9e 919 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
dbae740e 920 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
5c7640ab 921 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
87d3ce11 922 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
8c9e4cfb 923 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
6113252d 924 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
7900c600 925 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
d7631e30 926 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
9e075680 927 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
c6f08966 928 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
61ae2270 929#endif
a7fb8a23 930#if IS_ENABLED(CONFIG_AGP)
e92673ed
AV		 931 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
932 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
933 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
934 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
935 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
936 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
9a186645 937#endif
61ae2270 938#if IS_ENABLED(CONFIG_DRM_LEGACY)
314ed736
AV		 939 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
940 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
61ae2270 941#endif
09e40d65 942#if defined(CONFIG_X86) || defined(CONFIG_IA64)
1a36bf1d 943 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
09e40d65 944#endif
d5288c88 945 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
a988588b 946#if defined(CONFIG_X86) || defined(CONFIG_IA64)
d6c56613 947 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
a988588b 948#endif
9a186645
DA		 949};
950
951/**
2640981f
DV		 952 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
953 * @filp: file this ioctl is called on
954 * @cmd: ioctl cmd number
955 * @arg: user argument
956 *
957 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
958 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
959 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
960 * botched IOCTL itself, it must handle those by wrapping this function.
9a186645 961 *
2640981f
DV		 962 * Returns:
963 * Zero on success, negative error code on failure.
9a186645
DA		 964 */
965long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
966{
967 unsigned int nr = DRM_IOCTL_NR(cmd);
88e3cb07 968 struct drm_file *file_priv = filp->private_data;
9a186645
DA		 969 drm_ioctl_compat_t *fn;
970 int ret;
971
7ffa05e0
IR		 972 /* Assume that ioctls without an explicit compat routine will just
973 * work. This may not always be a good assumption, but it's better
974 * than always failing.
975 */
3d77461e 976 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
ed8b6704 977 return drm_ioctl(filp, cmd, arg);
9a186645 978
9f43e542
AV		 979 fn = drm_compat_ioctls[nr].fn;
980 if (!fn)
981 return drm_ioctl(filp, cmd, arg);
9a186645 982
88e3cb07
AV		 983 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
984 task_pid_nr(current),
985 (long)old_encode_dev(file_priv->minor->kdev->devt),
986 file_priv->authenticated,
987 drm_compat_ioctls[nr].name);
988 ret = (*fn)(filp, cmd, arg);
989 if (ret)
990 DRM_DEBUG("ret = %d\n", ret);
9a186645
DA		 991 return ret;
992}
993EXPORT_SYMBOL(drm_compat_ioctl);
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