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