1 /*
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>
31 #include <linux/ratelimit.h>
32 #include <linux/export.h>
33
34 #include <drm/drmP.h>
35 #include "drm_legacy.h"
36 #include "drm_internal.h"
37 #include "drm_crtc_internal.h"
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
71 #define DRM_IOCTL_UPDATE_DRAW32 DRM_IOW( 0x3f, drm_update_draw32_t)
72
73 #define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
74
75 #define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
76
77 typedef struct drm_version_32 {
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 */
87 } drm_version32_t;
88
compat_drm_version(struct file * file,unsigned int cmd,unsigned long arg)89 static int compat_drm_version(struct file *file, unsigned int cmd,
90 unsigned long arg)
91 {
92 drm_version32_t v32;
93 struct drm_version v;
94 int err;
95
96 if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
97 return -EFAULT;
98
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,
108 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
109 if (err)
110 return err;
111
112 v32.version_major = v.version_major;
113 v32.version_minor = v.version_minor;
114 v32.version_patchlevel = v.version_patchlevel;
115 v32.name_len = v.name_len;
116 v32.date_len = v.date_len;
117 v32.desc_len = v.desc_len;
118 if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
119 return -EFAULT;
120 return 0;
121 }
122
123 typedef struct drm_unique32 {
124 u32 unique_len; /* Length of unique */
125 u32 unique; /* Unique name for driver instantiation */
126 } drm_unique32_t;
127
compat_drm_getunique(struct file * file,unsigned int cmd,unsigned long arg)128 static int compat_drm_getunique(struct file *file, unsigned int cmd,
129 unsigned long arg)
130 {
131 drm_unique32_t uq32;
132 struct drm_unique uq;
133 int err;
134
135 if (copy_from_user(&uq32, (void __user *)arg, sizeof(uq32)))
136 return -EFAULT;
137 uq = (struct drm_unique){
138 .unique_len = uq32.unique_len,
139 .unique = compat_ptr(uq32.unique),
140 };
141
142 err = drm_ioctl_kernel(file, drm_getunique, &uq, DRM_UNLOCKED);
143 if (err)
144 return err;
145
146 uq32.unique_len = uq.unique_len;
147 if (copy_to_user((void __user *)arg, &uq32, sizeof(uq32)))
148 return -EFAULT;
149 return 0;
150 }
151
compat_drm_setunique(struct file * file,unsigned int cmd,unsigned long arg)152 static int compat_drm_setunique(struct file *file, unsigned int cmd,
153 unsigned long arg)
154 {
155 /* it's dead */
156 return -EINVAL;
157 }
158
159 typedef struct drm_map32 {
160 u32 offset; /* Requested physical address (0 for SAREA) */
161 u32 size; /* Requested physical size (bytes) */
162 enum drm_map_type type; /* Type of memory to map */
163 enum drm_map_flags flags; /* Flags */
164 u32 handle; /* User-space: "Handle" to pass to mmap() */
165 int mtrr; /* MTRR slot used */
166 } drm_map32_t;
167
compat_drm_getmap(struct file * file,unsigned int cmd,unsigned long arg)168 static int compat_drm_getmap(struct file *file, unsigned int cmd,
169 unsigned long arg)
170 {
171 drm_map32_t __user *argp = (void __user *)arg;
172 drm_map32_t m32;
173 struct drm_map map;
174 int err;
175
176 if (copy_from_user(&m32, argp, sizeof(m32)))
177 return -EFAULT;
178
179 map.offset = m32.offset;
180 err = drm_ioctl_kernel(file, drm_legacy_getmap_ioctl, &map, DRM_UNLOCKED);
181 if (err)
182 return err;
183
184 m32.offset = map.offset;
185 m32.size = map.size;
186 m32.type = map.type;
187 m32.flags = map.flags;
188 m32.handle = ptr_to_compat(map.handle);
189 m32.mtrr = map.mtrr;
190 if (copy_to_user(argp, &m32, sizeof(m32)))
191 return -EFAULT;
192 return 0;
193
194 }
195
compat_drm_addmap(struct file * file,unsigned int cmd,unsigned long arg)196 static int compat_drm_addmap(struct file *file, unsigned int cmd,
197 unsigned long arg)
198 {
199 drm_map32_t __user *argp = (void __user *)arg;
200 drm_map32_t m32;
201 struct drm_map map;
202 int err;
203
204 if (copy_from_user(&m32, argp, sizeof(m32)))
205 return -EFAULT;
206
207 map.offset = m32.offset;
208 map.size = m32.size;
209 map.type = m32.type;
210 map.flags = m32.flags;
211
212 err = drm_ioctl_kernel(file, drm_legacy_addmap_ioctl, &map,
213 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
214 if (err)
215 return err;
216
217 m32.offset = map.offset;
218 m32.mtrr = map.mtrr;
219 m32.handle = ptr_to_compat(map.handle);
220 if (map.handle != compat_ptr(m32.handle))
221 pr_err_ratelimited("compat_drm_addmap truncated handle %p for type %d offset %x\n",
222 map.handle, m32.type, m32.offset);
223
224 if (copy_to_user(argp, &m32, sizeof(m32)))
225 return -EFAULT;
226
227 return 0;
228 }
229
compat_drm_rmmap(struct file * file,unsigned int cmd,unsigned long arg)230 static int compat_drm_rmmap(struct file *file, unsigned int cmd,
231 unsigned long arg)
232 {
233 drm_map32_t __user *argp = (void __user *)arg;
234 struct drm_map map;
235 u32 handle;
236
237 if (get_user(handle, &argp->handle))
238 return -EFAULT;
239 map.handle = compat_ptr(handle);
240 return drm_ioctl_kernel(file, drm_legacy_rmmap_ioctl, &map, DRM_AUTH);
241 }
242
243 typedef struct drm_client32 {
244 int idx; /* Which client desired? */
245 int auth; /* Is client authenticated? */
246 u32 pid; /* Process ID */
247 u32 uid; /* User ID */
248 u32 magic; /* Magic */
249 u32 iocs; /* Ioctl count */
250 } drm_client32_t;
251
compat_drm_getclient(struct file * file,unsigned int cmd,unsigned long arg)252 static int compat_drm_getclient(struct file *file, unsigned int cmd,
253 unsigned long arg)
254 {
255 drm_client32_t c32;
256 drm_client32_t __user *argp = (void __user *)arg;
257 struct drm_client client;
258 int err;
259
260 if (copy_from_user(&c32, argp, sizeof(c32)))
261 return -EFAULT;
262
263 client.idx = c32.idx;
264
265 err = drm_ioctl_kernel(file, drm_getclient, &client, DRM_UNLOCKED);
266 if (err)
267 return err;
268
269 c32.idx = client.idx;
270 c32.auth = client.auth;
271 c32.pid = client.pid;
272 c32.uid = client.uid;
273 c32.magic = client.magic;
274 c32.iocs = client.iocs;
275
276 if (copy_to_user(argp, &c32, sizeof(c32)))
277 return -EFAULT;
278 return 0;
279 }
280
281 typedef struct drm_stats32 {
282 u32 count;
283 struct {
284 u32 value;
285 enum drm_stat_type type;
286 } data[15];
287 } drm_stats32_t;
288
compat_drm_getstats(struct file * file,unsigned int cmd,unsigned long arg)289 static int compat_drm_getstats(struct file *file, unsigned int cmd,
290 unsigned long arg)
291 {
292 drm_stats32_t __user *argp = (void __user *)arg;
293 int err;
294
295 err = drm_ioctl_kernel(file, drm_noop, NULL, DRM_UNLOCKED);
296 if (err)
297 return err;
298
299 if (clear_user(argp, sizeof(drm_stats32_t)))
300 return -EFAULT;
301 return 0;
302 }
303
304 typedef struct drm_buf_desc32 {
305 int count; /* Number of buffers of this size */
306 int size; /* Size in bytes */
307 int low_mark; /* Low water mark */
308 int high_mark; /* High water mark */
309 int flags;
310 u32 agp_start; /* Start address in the AGP aperture */
311 } drm_buf_desc32_t;
312
compat_drm_addbufs(struct file * file,unsigned int cmd,unsigned long arg)313 static int compat_drm_addbufs(struct file *file, unsigned int cmd,
314 unsigned long arg)
315 {
316 drm_buf_desc32_t __user *argp = (void __user *)arg;
317 drm_buf_desc32_t desc32;
318 struct drm_buf_desc desc;
319 int err;
320
321 if (copy_from_user(&desc32, argp, sizeof(drm_buf_desc32_t)))
322 return -EFAULT;
323
324 desc = (struct drm_buf_desc){
325 desc32.count, desc32.size, desc32.low_mark, desc32.high_mark,
326 desc32.flags, desc32.agp_start
327 };
328
329 err = drm_ioctl_kernel(file, drm_legacy_addbufs, &desc,
330 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
331 if (err)
332 return err;
333
334 desc32 = (drm_buf_desc32_t){
335 desc.count, desc.size, desc.low_mark, desc.high_mark,
336 desc.flags, desc.agp_start
337 };
338 if (copy_to_user(argp, &desc32, sizeof(drm_buf_desc32_t)))
339 return -EFAULT;
340
341 return 0;
342 }
343
compat_drm_markbufs(struct file * file,unsigned int cmd,unsigned long arg)344 static int compat_drm_markbufs(struct file *file, unsigned int cmd,
345 unsigned long arg)
346 {
347 drm_buf_desc32_t b32;
348 drm_buf_desc32_t __user *argp = (void __user *)arg;
349 struct drm_buf_desc buf;
350
351 if (copy_from_user(&b32, argp, sizeof(b32)))
352 return -EFAULT;
353
354 buf.size = b32.size;
355 buf.low_mark = b32.low_mark;
356 buf.high_mark = b32.high_mark;
357
358 return drm_ioctl_kernel(file, drm_legacy_markbufs, &buf,
359 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
360 }
361
362 typedef struct drm_buf_info32 {
363 int count; /**< Entries in list */
364 u32 list;
365 } drm_buf_info32_t;
366
copy_one_buf32(void * data,int count,struct drm_buf_entry * from)367 static int copy_one_buf32(void *data, int count, struct drm_buf_entry *from)
368 {
369 drm_buf_info32_t *request = data;
370 drm_buf_desc32_t __user *to = compat_ptr(request->list);
371 drm_buf_desc32_t v = {.count = from->buf_count,
372 .size = from->buf_size,
373 .low_mark = from->low_mark,
374 .high_mark = from->high_mark};
375
376 if (copy_to_user(to + count, &v, offsetof(drm_buf_desc32_t, flags)))
377 return -EFAULT;
378 return 0;
379 }
380
drm_legacy_infobufs32(struct drm_device * dev,void * data,struct drm_file * file_priv)381 static 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
compat_drm_infobufs(struct file * file,unsigned int cmd,unsigned long arg)388 static 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;
393 int err;
394
395 if (copy_from_user(&req32, argp, sizeof(req32)))
396 return -EFAULT;
397
398 if (req32.count < 0)
399 req32.count = 0;
400
401 err = drm_ioctl_kernel(file, drm_legacy_infobufs32, &req32, DRM_AUTH);
402 if (err)
403 return err;
404
405 if (put_user(req32.count, &argp->count))
406 return -EFAULT;
407
408 return 0;
409 }
410
411 typedef struct drm_buf_pub32 {
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 */
416 } drm_buf_pub32_t;
417
418 typedef struct drm_buf_map32 {
419 int count; /**< Length of the buffer list */
420 u32 virtual; /**< Mmap'd area in user-virtual */
421 u32 list; /**< Buffer information */
422 } drm_buf_map32_t;
423
map_one_buf32(void * data,int idx,unsigned long virtual,struct drm_buf * buf)424 static 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
drm_legacy_mapbufs32(struct drm_device * dev,void * data,struct drm_file * file_priv)440 static 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
compat_drm_mapbufs(struct file * file,unsigned int cmd,unsigned long arg)452 static 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;
457 int err;
458
459 if (copy_from_user(&req32, argp, sizeof(req32)))
460 return -EFAULT;
461 if (req32.count < 0)
462 return -EINVAL;
463
464 err = drm_ioctl_kernel(file, drm_legacy_mapbufs32, &req32, DRM_AUTH);
465 if (err)
466 return err;
467
468 if (put_user(req32.count, &argp->count)
469 || put_user(req32.virtual, &argp->virtual))
470 return -EFAULT;
471
472 return 0;
473 }
474
475 typedef struct drm_buf_free32 {
476 int count;
477 u32 list;
478 } drm_buf_free32_t;
479
compat_drm_freebufs(struct file * file,unsigned int cmd,unsigned long arg)480 static int compat_drm_freebufs(struct file *file, unsigned int cmd,
481 unsigned long arg)
482 {
483 drm_buf_free32_t req32;
484 struct drm_buf_free request;
485 drm_buf_free32_t __user *argp = (void __user *)arg;
486
487 if (copy_from_user(&req32, argp, sizeof(req32)))
488 return -EFAULT;
489
490 request.count = req32.count;
491 request.list = compat_ptr(req32.list);
492 return drm_ioctl_kernel(file, drm_legacy_freebufs, &request, DRM_AUTH);
493 }
494
495 typedef struct drm_ctx_priv_map32 {
496 unsigned int ctx_id; /**< Context requesting private mapping */
497 u32 handle; /**< Handle of map */
498 } drm_ctx_priv_map32_t;
499
compat_drm_setsareactx(struct file * file,unsigned int cmd,unsigned long arg)500 static int compat_drm_setsareactx(struct file *file, unsigned int cmd,
501 unsigned long arg)
502 {
503 drm_ctx_priv_map32_t req32;
504 struct drm_ctx_priv_map request;
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
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);
514 }
515
compat_drm_getsareactx(struct file * file,unsigned int cmd,unsigned long arg)516 static int compat_drm_getsareactx(struct file *file, unsigned int cmd,
517 unsigned long arg)
518 {
519 struct drm_ctx_priv_map req;
520 drm_ctx_priv_map32_t req32;
521 drm_ctx_priv_map32_t __user *argp = (void __user *)arg;
522 int err;
523
524 if (copy_from_user(&req32, argp, sizeof(req32)))
525 return -EFAULT;
526
527 req.ctx_id = req32.ctx_id;
528 err = drm_ioctl_kernel(file, drm_legacy_getsareactx, &req, DRM_AUTH);
529 if (err)
530 return err;
531
532 req32.handle = ptr_to_compat(req.handle);
533 if (copy_to_user(argp, &req32, sizeof(req32)))
534 return -EFAULT;
535
536 return 0;
537 }
538
539 typedef struct drm_ctx_res32 {
540 int count;
541 u32 contexts;
542 } drm_ctx_res32_t;
543
compat_drm_resctx(struct file * file,unsigned int cmd,unsigned long arg)544 static 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;
549 struct drm_ctx_res res;
550 int err;
551
552 if (copy_from_user(&res32, argp, sizeof(res32)))
553 return -EFAULT;
554
555 res.count = res32.count;
556 res.contexts = compat_ptr(res32.contexts);
557 err = drm_ioctl_kernel(file, drm_legacy_resctx, &res, DRM_AUTH);
558 if (err)
559 return err;
560
561 res32.count = res.count;
562 if (copy_to_user(argp, &res32, sizeof(res32)))
563 return -EFAULT;
564
565 return 0;
566 }
567
568 typedef struct drm_dma32 {
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 */
573 enum drm_dma_flags flags; /**< Flags */
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 */
579 } drm_dma32_t;
580
compat_drm_dma(struct file * file,unsigned int cmd,unsigned long arg)581 static int compat_drm_dma(struct file *file, unsigned int cmd,
582 unsigned long arg)
583 {
584 drm_dma32_t d32;
585 drm_dma32_t __user *argp = (void __user *)arg;
586 struct drm_dma d;
587 int err;
588
589 if (copy_from_user(&d32, argp, sizeof(d32)))
590 return -EFAULT;
591
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);
601 if (err)
602 return err;
603
604 if (put_user(d.request_size, &argp->request_size)
605 || put_user(d.granted_count, &argp->granted_count))
606 return -EFAULT;
607
608 return 0;
609 }
610
611 #if IS_ENABLED(CONFIG_AGP)
612 typedef struct drm_agp_mode32 {
613 u32 mode; /**< AGP mode */
614 } drm_agp_mode32_t;
615
compat_drm_agp_enable(struct file * file,unsigned int cmd,unsigned long arg)616 static int compat_drm_agp_enable(struct file *file, unsigned int cmd,
617 unsigned long arg)
618 {
619 drm_agp_mode32_t __user *argp = (void __user *)arg;
620 struct drm_agp_mode mode;
621
622 if (get_user(mode.mode, &argp->mode))
623 return -EFAULT;
624
625 return drm_ioctl_kernel(file, drm_agp_enable_ioctl, &mode,
626 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
627 }
628
629 typedef struct drm_agp_info32 {
630 int agp_version_major;
631 int agp_version_minor;
632 u32 mode;
633 u32 aperture_base; /* physical address */
634 u32 aperture_size; /* bytes */
635 u32 memory_allowed; /* bytes */
636 u32 memory_used;
637
638 /* PCI information */
639 unsigned short id_vendor;
640 unsigned short id_device;
641 } drm_agp_info32_t;
642
compat_drm_agp_info(struct file * file,unsigned int cmd,unsigned long arg)643 static int compat_drm_agp_info(struct file *file, unsigned int cmd,
644 unsigned long arg)
645 {
646 drm_agp_info32_t __user *argp = (void __user *)arg;
647 drm_agp_info32_t i32;
648 struct drm_agp_info info;
649 int err;
650
651 err = drm_ioctl_kernel(file, drm_agp_info_ioctl, &info, DRM_AUTH);
652 if (err)
653 return err;
654
655 i32.agp_version_major = info.agp_version_major;
656 i32.agp_version_minor = info.agp_version_minor;
657 i32.mode = info.mode;
658 i32.aperture_base = info.aperture_base;
659 i32.aperture_size = info.aperture_size;
660 i32.memory_allowed = info.memory_allowed;
661 i32.memory_used = info.memory_used;
662 i32.id_vendor = info.id_vendor;
663 i32.id_device = info.id_device;
664 if (copy_to_user(argp, &i32, sizeof(i32)))
665 return -EFAULT;
666
667 return 0;
668 }
669
670 typedef struct drm_agp_buffer32 {
671 u32 size; /**< In bytes -- will round to page boundary */
672 u32 handle; /**< Used for binding / unbinding */
673 u32 type; /**< Type of memory to allocate */
674 u32 physical; /**< Physical used by i810 */
675 } drm_agp_buffer32_t;
676
compat_drm_agp_alloc(struct file * file,unsigned int cmd,unsigned long arg)677 static int compat_drm_agp_alloc(struct file *file, unsigned int cmd,
678 unsigned long arg)
679 {
680 drm_agp_buffer32_t __user *argp = (void __user *)arg;
681 drm_agp_buffer32_t req32;
682 struct drm_agp_buffer request;
683 int err;
684
685 if (copy_from_user(&req32, argp, sizeof(req32)))
686 return -EFAULT;
687
688 request.size = req32.size;
689 request.type = req32.type;
690 err = drm_ioctl_kernel(file, drm_agp_alloc_ioctl, &request,
691 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
692 if (err)
693 return err;
694
695 req32.handle = request.handle;
696 req32.physical = request.physical;
697 if (copy_to_user(argp, &req32, sizeof(req32))) {
698 drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
699 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
700 return -EFAULT;
701 }
702
703 return 0;
704 }
705
compat_drm_agp_free(struct file * file,unsigned int cmd,unsigned long arg)706 static int compat_drm_agp_free(struct file *file, unsigned int cmd,
707 unsigned long arg)
708 {
709 drm_agp_buffer32_t __user *argp = (void __user *)arg;
710 struct drm_agp_buffer request;
711
712 if (get_user(request.handle, &argp->handle))
713 return -EFAULT;
714
715 return drm_ioctl_kernel(file, drm_agp_free_ioctl, &request,
716 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
717 }
718
719 typedef struct drm_agp_binding32 {
720 u32 handle; /**< From drm_agp_buffer */
721 u32 offset; /**< In bytes -- will round to page boundary */
722 } drm_agp_binding32_t;
723
compat_drm_agp_bind(struct file * file,unsigned int cmd,unsigned long arg)724 static int compat_drm_agp_bind(struct file *file, unsigned int cmd,
725 unsigned long arg)
726 {
727 drm_agp_binding32_t __user *argp = (void __user *)arg;
728 drm_agp_binding32_t req32;
729 struct drm_agp_binding request;
730
731 if (copy_from_user(&req32, argp, sizeof(req32)))
732 return -EFAULT;
733
734 request.handle = req32.handle;
735 request.offset = req32.offset;
736 return drm_ioctl_kernel(file, drm_agp_bind_ioctl, &request,
737 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
738 }
739
compat_drm_agp_unbind(struct file * file,unsigned int cmd,unsigned long arg)740 static int compat_drm_agp_unbind(struct file *file, unsigned int cmd,
741 unsigned long arg)
742 {
743 drm_agp_binding32_t __user *argp = (void __user *)arg;
744 struct drm_agp_binding request;
745
746 if (get_user(request.handle, &argp->handle))
747 return -EFAULT;
748
749 return drm_ioctl_kernel(file, drm_agp_unbind_ioctl, &request,
750 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
751 }
752 #endif /* CONFIG_AGP */
753
754 typedef struct drm_scatter_gather32 {
755 u32 size; /**< In bytes -- will round to page boundary */
756 u32 handle; /**< Used for mapping / unmapping */
757 } drm_scatter_gather32_t;
758
compat_drm_sg_alloc(struct file * file,unsigned int cmd,unsigned long arg)759 static int compat_drm_sg_alloc(struct file *file, unsigned int cmd,
760 unsigned long arg)
761 {
762 drm_scatter_gather32_t __user *argp = (void __user *)arg;
763 struct drm_scatter_gather request;
764 int err;
765
766 if (get_user(request.size, &argp->size))
767 return -EFAULT;
768
769 err = drm_ioctl_kernel(file, drm_legacy_sg_alloc, &request,
770 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
771 if (err)
772 return err;
773
774 /* XXX not sure about the handle conversion here... */
775 if (put_user(request.handle >> PAGE_SHIFT, &argp->handle))
776 return -EFAULT;
777
778 return 0;
779 }
780
compat_drm_sg_free(struct file * file,unsigned int cmd,unsigned long arg)781 static int compat_drm_sg_free(struct file *file, unsigned int cmd,
782 unsigned long arg)
783 {
784 drm_scatter_gather32_t __user *argp = (void __user *)arg;
785 struct drm_scatter_gather request;
786 unsigned long x;
787
788 if (get_user(x, &argp->handle))
789 return -EFAULT;
790 request.handle = x << PAGE_SHIFT;
791 return drm_ioctl_kernel(file, drm_legacy_sg_free, &request,
792 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
793 }
794
795 #if defined(CONFIG_X86)
796 typedef struct drm_update_draw32 {
797 drm_drawable_t handle;
798 unsigned int type;
799 unsigned int num;
800 /* 64-bit version has a 32-bit pad here */
801 u64 data; /**< Pointer */
802 } __attribute__((packed)) drm_update_draw32_t;
803
compat_drm_update_draw(struct file * file,unsigned int cmd,unsigned long arg)804 static int compat_drm_update_draw(struct file *file, unsigned int cmd,
805 unsigned long arg)
806 {
807 drm_update_draw32_t update32;
808 if (copy_from_user(&update32, (void __user *)arg, sizeof(update32)))
809 return -EFAULT;
810
811 return drm_ioctl_kernel(file, drm_noop, NULL,
812 DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
813 }
814 #endif
815
816 struct drm_wait_vblank_request32 {
817 enum drm_vblank_seq_type type;
818 unsigned int sequence;
819 u32 signal;
820 };
821
822 struct drm_wait_vblank_reply32 {
823 enum drm_vblank_seq_type type;
824 unsigned int sequence;
825 s32 tval_sec;
826 s32 tval_usec;
827 };
828
829 typedef union drm_wait_vblank32 {
830 struct drm_wait_vblank_request32 request;
831 struct drm_wait_vblank_reply32 reply;
832 } drm_wait_vblank32_t;
833
compat_drm_wait_vblank(struct file * file,unsigned int cmd,unsigned long arg)834 static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
835 unsigned long arg)
836 {
837 drm_wait_vblank32_t __user *argp = (void __user *)arg;
838 drm_wait_vblank32_t req32;
839 union drm_wait_vblank req;
840 int err;
841
842 if (copy_from_user(&req32, argp, sizeof(req32)))
843 return -EFAULT;
844
845 req.request.type = req32.request.type;
846 req.request.sequence = req32.request.sequence;
847 req.request.signal = req32.request.signal;
848 err = drm_ioctl_kernel(file, drm_wait_vblank_ioctl, &req, DRM_UNLOCKED);
849 if (err)
850 return err;
851
852 req32.reply.type = req.reply.type;
853 req32.reply.sequence = req.reply.sequence;
854 req32.reply.tval_sec = req.reply.tval_sec;
855 req32.reply.tval_usec = req.reply.tval_usec;
856 if (copy_to_user(argp, &req32, sizeof(req32)))
857 return -EFAULT;
858
859 return 0;
860 }
861
862 #if defined(CONFIG_X86)
863 typedef struct drm_mode_fb_cmd232 {
864 u32 fb_id;
865 u32 width;
866 u32 height;
867 u32 pixel_format;
868 u32 flags;
869 u32 handles[4];
870 u32 pitches[4];
871 u32 offsets[4];
872 u64 modifier[4];
873 } __attribute__((packed)) drm_mode_fb_cmd232_t;
874
compat_drm_mode_addfb2(struct file * file,unsigned int cmd,unsigned long arg)875 static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
876 unsigned long arg)
877 {
878 struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
879 struct drm_mode_fb_cmd2 req64;
880 int err;
881
882 if (copy_from_user(&req64, argp,
883 offsetof(drm_mode_fb_cmd232_t, modifier)))
884 return -EFAULT;
885
886 if (copy_from_user(&req64.modifier, &argp->modifier,
887 sizeof(req64.modifier)))
888 return -EFAULT;
889
890 err = drm_ioctl_kernel(file, drm_mode_addfb2, &req64,
891 DRM_CONTROL_ALLOW|DRM_UNLOCKED);
892 if (err)
893 return err;
894
895 if (put_user(req64.fb_id, &argp->fb_id))
896 return -EFAULT;
897
898 return 0;
899 }
900 #endif
901
902 static struct {
903 drm_ioctl_compat_t *fn;
904 char *name;
905 } drm_compat_ioctls[] = {
906 #define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
907 DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
908 DRM_IOCTL32_DEF(DRM_IOCTL_GET_UNIQUE, compat_drm_getunique),
909 DRM_IOCTL32_DEF(DRM_IOCTL_GET_MAP, compat_drm_getmap),
910 DRM_IOCTL32_DEF(DRM_IOCTL_GET_CLIENT, compat_drm_getclient),
911 DRM_IOCTL32_DEF(DRM_IOCTL_GET_STATS, compat_drm_getstats),
912 DRM_IOCTL32_DEF(DRM_IOCTL_SET_UNIQUE, compat_drm_setunique),
913 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_MAP, compat_drm_addmap),
914 DRM_IOCTL32_DEF(DRM_IOCTL_ADD_BUFS, compat_drm_addbufs),
915 DRM_IOCTL32_DEF(DRM_IOCTL_MARK_BUFS, compat_drm_markbufs),
916 DRM_IOCTL32_DEF(DRM_IOCTL_INFO_BUFS, compat_drm_infobufs),
917 DRM_IOCTL32_DEF(DRM_IOCTL_MAP_BUFS, compat_drm_mapbufs),
918 DRM_IOCTL32_DEF(DRM_IOCTL_FREE_BUFS, compat_drm_freebufs),
919 DRM_IOCTL32_DEF(DRM_IOCTL_RM_MAP, compat_drm_rmmap),
920 DRM_IOCTL32_DEF(DRM_IOCTL_SET_SAREA_CTX, compat_drm_setsareactx),
921 DRM_IOCTL32_DEF(DRM_IOCTL_GET_SAREA_CTX, compat_drm_getsareactx),
922 DRM_IOCTL32_DEF(DRM_IOCTL_RES_CTX, compat_drm_resctx),
923 DRM_IOCTL32_DEF(DRM_IOCTL_DMA, compat_drm_dma),
924 #if IS_ENABLED(CONFIG_AGP)
925 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ENABLE, compat_drm_agp_enable),
926 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_INFO, compat_drm_agp_info),
927 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_ALLOC, compat_drm_agp_alloc),
928 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_FREE, compat_drm_agp_free),
929 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_BIND, compat_drm_agp_bind),
930 DRM_IOCTL32_DEF(DRM_IOCTL_AGP_UNBIND, compat_drm_agp_unbind),
931 #endif
932 DRM_IOCTL32_DEF(DRM_IOCTL_SG_ALLOC, compat_drm_sg_alloc),
933 DRM_IOCTL32_DEF(DRM_IOCTL_SG_FREE, compat_drm_sg_free),
934 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
935 DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
936 #endif
937 DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
938 #if defined(CONFIG_X86) || defined(CONFIG_IA64)
939 DRM_IOCTL32_DEF(DRM_IOCTL_MODE_ADDFB2, compat_drm_mode_addfb2),
940 #endif
941 };
942
943 /**
944 * drm_compat_ioctl - 32bit IOCTL compatibility handler for DRM drivers
945 * @filp: file this ioctl is called on
946 * @cmd: ioctl cmd number
947 * @arg: user argument
948 *
949 * Compatibility handler for 32 bit userspace running on 64 kernels. All actual
950 * IOCTL handling is forwarded to drm_ioctl(), while marshalling structures as
951 * appropriate. Note that this only handles DRM core IOCTLs, if the driver has
952 * botched IOCTL itself, it must handle those by wrapping this function.
953 *
954 * Returns:
955 * Zero on success, negative error code on failure.
956 */
drm_compat_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)957 long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
958 {
959 unsigned int nr = DRM_IOCTL_NR(cmd);
960 struct drm_file *file_priv = filp->private_data;
961 drm_ioctl_compat_t *fn;
962 int ret;
963
964 /* Assume that ioctls without an explicit compat routine will just
965 * work. This may not always be a good assumption, but it's better
966 * than always failing.
967 */
968 if (nr >= ARRAY_SIZE(drm_compat_ioctls))
969 return drm_ioctl(filp, cmd, arg);
970
971 fn = drm_compat_ioctls[nr].fn;
972 if (!fn)
973 return drm_ioctl(filp, cmd, arg);
974
975 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
976 task_pid_nr(current),
977 (long)old_encode_dev(file_priv->minor->kdev->devt),
978 file_priv->authenticated,
979 drm_compat_ioctls[nr].name);
980 ret = (*fn)(filp, cmd, arg);
981 if (ret)
982 DRM_DEBUG("ret = %d\n", ret);
983 return ret;
984 }
985 EXPORT_SYMBOL(drm_compat_ioctl);
986