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1da177e4 LT |
1 | /* |
2 | * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com | |
3 | * | |
4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
6 | * All Rights Reserved. | |
7 | * | |
ec8f112d DH |
8 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
9 | * Author Gareth Hughes <gareth@valinux.com> | |
10 | * | |
1da177e4 LT |
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 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
28 | * OTHER DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
760285e7 DH |
31 | #include <drm/drmP.h> |
32 | #include <drm/drm_core.h> | |
e7b96070 | 33 | #include "drm_legacy.h" |
18882995 | 34 | #include "drm_internal.h" |
a97df1cc | 35 | #include "drm_crtc_internal.h" |
1da177e4 | 36 | |
760285e7 DH |
37 | #include <linux/pci.h> |
38 | #include <linux/export.h> | |
0dd99f1b AL |
39 | #ifdef CONFIG_X86 |
40 | #include <asm/mtrr.h> | |
41 | #endif | |
1da177e4 | 42 | |
ec8f112d DH |
43 | static int drm_version(struct drm_device *dev, void *data, |
44 | struct drm_file *file_priv); | |
45 | ||
1da177e4 LT |
46 | /** |
47 | * Get the bus id. | |
b5e89ed5 | 48 | * |
1da177e4 | 49 | * \param inode device inode. |
6c340eac | 50 | * \param file_priv DRM file private. |
1da177e4 LT |
51 | * \param cmd command. |
52 | * \param arg user argument, pointing to a drm_unique structure. | |
53 | * \return zero on success or a negative number on failure. | |
54 | * | |
55 | * Copies the bus id from drm_device::unique into user space. | |
56 | */ | |
78238757 | 57 | static int drm_getunique(struct drm_device *dev, void *data, |
c153f45f | 58 | struct drm_file *file_priv) |
1da177e4 | 59 | { |
c153f45f | 60 | struct drm_unique *u = data; |
7c1c2871 | 61 | struct drm_master *master = file_priv->master; |
1da177e4 | 62 | |
7c1c2871 DA |
63 | if (u->unique_len >= master->unique_len) { |
64 | if (copy_to_user(u->unique, master->unique, master->unique_len)) | |
1da177e4 LT |
65 | return -EFAULT; |
66 | } | |
7c1c2871 | 67 | u->unique_len = master->unique_len; |
c153f45f | 68 | |
1da177e4 LT |
69 | return 0; |
70 | } | |
71 | ||
3fb688fd CW |
72 | static void |
73 | drm_unset_busid(struct drm_device *dev, | |
74 | struct drm_master *master) | |
75 | { | |
3fb688fd CW |
76 | kfree(master->unique); |
77 | master->unique = NULL; | |
78 | master->unique_len = 0; | |
3fb688fd CW |
79 | } |
80 | ||
1da177e4 LT |
81 | /** |
82 | * Set the bus id. | |
b5e89ed5 | 83 | * |
1da177e4 | 84 | * \param inode device inode. |
6c340eac | 85 | * \param file_priv DRM file private. |
1da177e4 LT |
86 | * \param cmd command. |
87 | * \param arg user argument, pointing to a drm_unique structure. | |
88 | * \return zero on success or a negative number on failure. | |
89 | * | |
90 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
91 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
92 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
53bf2a2b DV |
93 | * version 1.1 or greater. Also note that KMS is all version 1.1 and later and |
94 | * UMS was only ever supported on pci devices. | |
1da177e4 | 95 | */ |
78238757 | 96 | static int drm_setunique(struct drm_device *dev, void *data, |
c153f45f | 97 | struct drm_file *file_priv) |
1da177e4 | 98 | { |
c153f45f | 99 | struct drm_unique *u = data; |
7c1c2871 | 100 | struct drm_master *master = file_priv->master; |
8410ea3b | 101 | int ret; |
1da177e4 | 102 | |
7c1c2871 | 103 | if (master->unique_len || master->unique) |
b5e89ed5 | 104 | return -EBUSY; |
1da177e4 | 105 | |
c153f45f | 106 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 107 | return -EINVAL; |
1da177e4 | 108 | |
53bf2a2b DV |
109 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
110 | return 0; | |
111 | ||
112 | if (WARN_ON(!dev->pdev)) | |
8410ea3b | 113 | return -EINVAL; |
b5e89ed5 | 114 | |
53bf2a2b | 115 | ret = drm_pci_set_unique(dev, master, u); |
8410ea3b | 116 | if (ret) |
3fb688fd | 117 | goto err; |
1da177e4 LT |
118 | |
119 | return 0; | |
3fb688fd CW |
120 | |
121 | err: | |
122 | drm_unset_busid(dev, master); | |
123 | return ret; | |
1da177e4 LT |
124 | } |
125 | ||
7c1c2871 | 126 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 127 | { |
7c1c2871 | 128 | struct drm_master *master = file_priv->master; |
8410ea3b | 129 | int ret; |
3fb688fd CW |
130 | |
131 | if (master->unique != NULL) | |
132 | drm_unset_busid(dev, master); | |
fe34765b | 133 | |
915b4d11 DH |
134 | if (dev->driver->set_busid) { |
135 | ret = dev->driver->set_busid(dev, master); | |
136 | if (ret) { | |
137 | drm_unset_busid(dev, master); | |
138 | return ret; | |
139 | } | |
ca8e2ad7 TR |
140 | } else { |
141 | if (WARN(dev->unique == NULL, | |
c5786fe5 | 142 | "No drm_driver.set_busid() implementation provided by " |
ca8e2ad7 TR |
143 | "%ps. Use drm_dev_set_unique() to set the unique " |
144 | "name explicitly.", dev->driver)) | |
145 | return -EINVAL; | |
146 | ||
147 | master->unique = kstrdup(dev->unique, GFP_KERNEL); | |
148 | if (master->unique) | |
149 | master->unique_len = strlen(dev->unique); | |
150 | } | |
151 | ||
1da177e4 LT |
152 | return 0; |
153 | } | |
154 | ||
1da177e4 LT |
155 | /** |
156 | * Get a mapping information. | |
157 | * | |
158 | * \param inode device inode. | |
6c340eac | 159 | * \param file_priv DRM file private. |
1da177e4 LT |
160 | * \param cmd command. |
161 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 162 | * |
1da177e4 LT |
163 | * \return zero on success or a negative number on failure. |
164 | * | |
165 | * Searches for the mapping with the specified offset and copies its information | |
166 | * into userspace | |
167 | */ | |
78238757 | 168 | static int drm_getmap(struct drm_device *dev, void *data, |
c153f45f | 169 | struct drm_file *file_priv) |
1da177e4 | 170 | { |
c153f45f | 171 | struct drm_map *map = data; |
55910517 | 172 | struct drm_map_list *r_list = NULL; |
1da177e4 | 173 | struct list_head *list; |
b5e89ed5 DA |
174 | int idx; |
175 | int i; | |
1da177e4 | 176 | |
c153f45f | 177 | idx = map->offset; |
09b4ea47 | 178 | if (idx < 0) |
1da177e4 | 179 | return -EINVAL; |
1da177e4 LT |
180 | |
181 | i = 0; | |
09b4ea47 | 182 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 183 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 184 | if (i == idx) { |
55910517 | 185 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
186 | break; |
187 | } | |
188 | i++; | |
189 | } | |
b5e89ed5 | 190 | if (!r_list || !r_list->map) { |
30e2fb18 | 191 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
192 | return -EINVAL; |
193 | } | |
194 | ||
c153f45f EA |
195 | map->offset = r_list->map->offset; |
196 | map->size = r_list->map->size; | |
197 | map->type = r_list->map->type; | |
198 | map->flags = r_list->map->flags; | |
199 | map->handle = (void *)(unsigned long) r_list->user_token; | |
0dd99f1b AL |
200 | |
201 | #ifdef CONFIG_X86 | |
202 | /* | |
203 | * There appears to be exactly one user of the mtrr index: dritest. | |
204 | * It's easy enough to keep it working on non-PAT systems. | |
205 | */ | |
206 | map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); | |
207 | #else | |
208 | map->mtrr = -1; | |
209 | #endif | |
210 | ||
30e2fb18 | 211 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 212 | |
1da177e4 LT |
213 | return 0; |
214 | } | |
215 | ||
216 | /** | |
217 | * Get client information. | |
218 | * | |
219 | * \param inode device inode. | |
6c340eac | 220 | * \param file_priv DRM file private. |
1da177e4 LT |
221 | * \param cmd command. |
222 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 223 | * |
1da177e4 LT |
224 | * \return zero on success or a negative number on failure. |
225 | * | |
226 | * Searches for the client with the specified index and copies its information | |
227 | * into userspace | |
228 | */ | |
78238757 | 229 | static int drm_getclient(struct drm_device *dev, void *data, |
c153f45f | 230 | struct drm_file *file_priv) |
1da177e4 | 231 | { |
c153f45f | 232 | struct drm_client *client = data; |
09b4ea47 | 233 | |
719524df DV |
234 | /* |
235 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools | |
236 | * not breaking completely. Userspace tools stop enumerating one they | |
237 | * get -EINVAL, hence this is the return value we need to hand back for | |
238 | * no clients tracked. | |
239 | * | |
240 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun | |
241 | * attempt to figure out whether they're authenticated or not. Since | |
242 | * that's the only thing they care about, give it to the directly | |
243 | * instead of walking one giant list. | |
244 | */ | |
245 | if (client->idx == 0) { | |
246 | client->auth = file_priv->authenticated; | |
247 | client->pid = pid_vnr(file_priv->pid); | |
248 | client->uid = from_kuid_munged(current_user_ns(), | |
249 | file_priv->uid); | |
250 | client->magic = 0; | |
251 | client->iocs = 0; | |
252 | ||
253 | return 0; | |
254 | } else { | |
255 | return -EINVAL; | |
bd1b331f | 256 | } |
1da177e4 LT |
257 | } |
258 | ||
b5e89ed5 DA |
259 | /** |
260 | * Get statistics information. | |
261 | * | |
1da177e4 | 262 | * \param inode device inode. |
6c340eac | 263 | * \param file_priv DRM file private. |
1da177e4 LT |
264 | * \param cmd command. |
265 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 266 | * |
1da177e4 LT |
267 | * \return zero on success or a negative number on failure. |
268 | */ | |
78238757 | 269 | static int drm_getstats(struct drm_device *dev, void *data, |
c153f45f | 270 | struct drm_file *file_priv) |
1da177e4 | 271 | { |
c153f45f | 272 | struct drm_stats *stats = data; |
1da177e4 | 273 | |
d79cdc83 | 274 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 275 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 276 | |
1da177e4 LT |
277 | return 0; |
278 | } | |
279 | ||
9f35421e BS |
280 | /** |
281 | * Get device/driver capabilities | |
282 | */ | |
78238757 | 283 | static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
9f35421e BS |
284 | { |
285 | struct drm_get_cap *req = data; | |
286 | ||
287 | req->value = 0; | |
e73f88af DA |
288 | switch (req->capability) { |
289 | case DRM_CAP_DUMB_BUFFER: | |
290 | if (dev->driver->dumb_create) | |
291 | req->value = 1; | |
292 | break; | |
51eab416 | 293 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
294 | req->value = 1; |
295 | break; | |
019d96cb DA |
296 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
297 | req->value = dev->mode_config.preferred_depth; | |
298 | break; | |
299 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
300 | req->value = dev->mode_config.prefer_shadow; | |
301 | break; | |
4271a409 DA |
302 | case DRM_CAP_PRIME: |
303 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
304 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
305 | break; | |
c61eef72 ID |
306 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
307 | req->value = drm_timestamp_monotonic; | |
308 | break; | |
62f2104f KP |
309 | case DRM_CAP_ASYNC_PAGE_FLIP: |
310 | req->value = dev->mode_config.async_page_flip; | |
311 | break; | |
8716ed4e AD |
312 | case DRM_CAP_CURSOR_WIDTH: |
313 | if (dev->mode_config.cursor_width) | |
314 | req->value = dev->mode_config.cursor_width; | |
315 | else | |
316 | req->value = 64; | |
317 | break; | |
318 | case DRM_CAP_CURSOR_HEIGHT: | |
319 | if (dev->mode_config.cursor_height) | |
320 | req->value = dev->mode_config.cursor_height; | |
321 | else | |
322 | req->value = 64; | |
323 | break; | |
e73f88af DA |
324 | default: |
325 | return -EINVAL; | |
326 | } | |
9f35421e BS |
327 | return 0; |
328 | } | |
329 | ||
1c0814fe DL |
330 | /** |
331 | * Set device/driver capabilities | |
332 | */ | |
78238757 | 333 | static int |
1c0814fe DL |
334 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
335 | { | |
61d8e328 DL |
336 | struct drm_set_client_cap *req = data; |
337 | ||
338 | switch (req->capability) { | |
339 | case DRM_CLIENT_CAP_STEREO_3D: | |
340 | if (req->value > 1) | |
341 | return -EINVAL; | |
342 | file_priv->stereo_allowed = req->value; | |
343 | break; | |
681e7ec7 | 344 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
681e7ec7 MR |
345 | if (req->value > 1) |
346 | return -EINVAL; | |
347 | file_priv->universal_planes = req->value; | |
348 | break; | |
88a48e29 RC |
349 | case DRM_CLIENT_CAP_ATOMIC: |
350 | /* for now, hide behind experimental drm.atomic moduleparam */ | |
351 | if (!drm_atomic) | |
352 | return -EINVAL; | |
353 | if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) | |
354 | return -EINVAL; | |
355 | if (req->value > 1) | |
356 | return -EINVAL; | |
357 | file_priv->atomic = req->value; | |
179f158c | 358 | file_priv->universal_planes = req->value; |
88a48e29 | 359 | break; |
61d8e328 DL |
360 | default: |
361 | return -EINVAL; | |
362 | } | |
363 | ||
364 | return 0; | |
1c0814fe DL |
365 | } |
366 | ||
1da177e4 LT |
367 | /** |
368 | * Setversion ioctl. | |
369 | * | |
370 | * \param inode device inode. | |
6c340eac | 371 | * \param file_priv DRM file private. |
1da177e4 LT |
372 | * \param cmd command. |
373 | * \param arg user argument, pointing to a drm_lock structure. | |
374 | * \return zero on success or negative number on failure. | |
375 | * | |
376 | * Sets the requested interface version | |
377 | */ | |
78238757 | 378 | static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 379 | { |
c153f45f EA |
380 | struct drm_set_version *sv = data; |
381 | int if_version, retcode = 0; | |
382 | ||
383 | if (sv->drm_di_major != -1) { | |
384 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
385 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
386 | retcode = -EINVAL; | |
387 | goto done; | |
388 | } | |
389 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
390 | sv->drm_di_minor); | |
3d77461e | 391 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 392 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
393 | /* |
394 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 395 | * Version 1.4 has proper PCI domain support |
1da177e4 | 396 | */ |
3fb688fd CW |
397 | retcode = drm_set_busid(dev, file_priv); |
398 | if (retcode) | |
399 | goto done; | |
1da177e4 LT |
400 | } |
401 | } | |
402 | ||
c153f45f EA |
403 | if (sv->drm_dd_major != -1) { |
404 | if (sv->drm_dd_major != dev->driver->major || | |
405 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
406 | dev->driver->minor) { | |
407 | retcode = -EINVAL; | |
408 | goto done; | |
409 | } | |
1da177e4 | 410 | } |
c153f45f EA |
411 | |
412 | done: | |
413 | sv->drm_di_major = DRM_IF_MAJOR; | |
414 | sv->drm_di_minor = DRM_IF_MINOR; | |
415 | sv->drm_dd_major = dev->driver->major; | |
416 | sv->drm_dd_minor = dev->driver->minor; | |
417 | ||
418 | return retcode; | |
1da177e4 LT |
419 | } |
420 | ||
421 | /** No-op ioctl. */ | |
c153f45f EA |
422 | int drm_noop(struct drm_device *dev, void *data, |
423 | struct drm_file *file_priv) | |
1da177e4 LT |
424 | { |
425 | DRM_DEBUG("\n"); | |
426 | return 0; | |
427 | } | |
b2c606fe | 428 | EXPORT_SYMBOL(drm_noop); |
ec8f112d DH |
429 | |
430 | /** | |
431 | * Copy and IOCTL return string to user space | |
432 | */ | |
433 | static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) | |
434 | { | |
435 | int len; | |
436 | ||
437 | /* don't overflow userbuf */ | |
438 | len = strlen(value); | |
439 | if (len > *buf_len) | |
440 | len = *buf_len; | |
441 | ||
442 | /* let userspace know exact length of driver value (which could be | |
443 | * larger than the userspace-supplied buffer) */ | |
444 | *buf_len = strlen(value); | |
445 | ||
446 | /* finally, try filling in the userbuf */ | |
447 | if (len && buf) | |
448 | if (copy_to_user(buf, value, len)) | |
449 | return -EFAULT; | |
450 | return 0; | |
451 | } | |
452 | ||
453 | /** | |
454 | * Get version information | |
455 | * | |
456 | * \param inode device inode. | |
457 | * \param filp file pointer. | |
458 | * \param cmd command. | |
459 | * \param arg user argument, pointing to a drm_version structure. | |
460 | * \return zero on success or negative number on failure. | |
461 | * | |
462 | * Fills in the version information in \p arg. | |
463 | */ | |
464 | static int drm_version(struct drm_device *dev, void *data, | |
465 | struct drm_file *file_priv) | |
466 | { | |
467 | struct drm_version *version = data; | |
468 | int err; | |
469 | ||
470 | version->version_major = dev->driver->major; | |
471 | version->version_minor = dev->driver->minor; | |
472 | version->version_patchlevel = dev->driver->patchlevel; | |
473 | err = drm_copy_field(version->name, &version->name_len, | |
474 | dev->driver->name); | |
475 | if (!err) | |
476 | err = drm_copy_field(version->date, &version->date_len, | |
477 | dev->driver->date); | |
478 | if (!err) | |
479 | err = drm_copy_field(version->desc, &version->desc_len, | |
480 | dev->driver->desc); | |
481 | ||
482 | return err; | |
483 | } | |
484 | ||
485 | /** | |
486 | * drm_ioctl_permit - Check ioctl permissions against caller | |
487 | * | |
488 | * @flags: ioctl permission flags. | |
489 | * @file_priv: Pointer to struct drm_file identifying the caller. | |
490 | * | |
491 | * Checks whether the caller is allowed to run an ioctl with the | |
492 | * indicated permissions. If so, returns zero. Otherwise returns an | |
493 | * error code suitable for ioctl return. | |
494 | */ | |
495 | static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) | |
496 | { | |
497 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ | |
498 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) | |
499 | return -EACCES; | |
500 | ||
501 | /* AUTH is only for authenticated or render client */ | |
502 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && | |
503 | !file_priv->authenticated)) | |
504 | return -EACCES; | |
505 | ||
506 | /* MASTER is only for master or control clients */ | |
7963e9db | 507 | if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && |
ec8f112d DH |
508 | !drm_is_control_client(file_priv))) |
509 | return -EACCES; | |
510 | ||
511 | /* Control clients must be explicitly allowed */ | |
512 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && | |
513 | drm_is_control_client(file_priv))) | |
514 | return -EACCES; | |
515 | ||
516 | /* Render clients must be explicitly allowed */ | |
517 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && | |
518 | drm_is_render_client(file_priv))) | |
519 | return -EACCES; | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
78238757 DV |
524 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ |
525 | [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl} | |
526 | ||
527 | /** Ioctl table */ | |
528 | static const struct drm_ioctl_desc drm_ioctls[] = { | |
529 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
530 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), | |
531 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), | |
532 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), | |
533 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), | |
534 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), | |
535 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), | |
536 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
537 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), | |
538 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), | |
539 | ||
540 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
541 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
542 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
543 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), | |
544 | ||
545 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
546 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), | |
547 | ||
548 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
549 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), | |
550 | ||
551 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), | |
552 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), | |
553 | ||
554 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), | |
555 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
556 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
557 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), | |
558 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
559 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
560 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), | |
561 | ||
562 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
563 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
564 | ||
565 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), | |
566 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), | |
567 | ||
568 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
569 | ||
570 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
571 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
572 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), | |
573 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), | |
574 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), | |
575 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), | |
576 | ||
577 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
578 | ||
579 | #if __OS_HAS_AGP | |
580 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
581 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
582 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
583 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), | |
584 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
585 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
586 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
587 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
588 | #endif | |
589 | ||
590 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
591 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
592 | ||
593 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), | |
594 | ||
595 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), | |
596 | ||
597 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
598 | ||
599 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
600 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
601 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
602 | ||
603 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
604 | ||
605 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
606 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
607 | ||
608 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
609 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
610 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
611 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
612 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
613 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
614 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), | |
615 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), | |
616 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
617 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
618 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
619 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
620 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
621 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
622 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
623 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
624 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
625 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
626 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
627 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
628 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
629 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
630 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
631 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
632 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
633 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
634 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
d34f20d6 | 635 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
78238757 DV |
636 | }; |
637 | ||
638 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) | |
639 | ||
ec8f112d DH |
640 | /** |
641 | * Called whenever a process performs an ioctl on /dev/drm. | |
642 | * | |
643 | * \param inode device inode. | |
644 | * \param file_priv DRM file private. | |
645 | * \param cmd command. | |
646 | * \param arg user argument. | |
647 | * \return zero on success or negative number on failure. | |
648 | * | |
649 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
650 | * previleges if so required, and dispatches to the respective function. | |
651 | */ | |
652 | long drm_ioctl(struct file *filp, | |
653 | unsigned int cmd, unsigned long arg) | |
654 | { | |
655 | struct drm_file *file_priv = filp->private_data; | |
656 | struct drm_device *dev; | |
657 | const struct drm_ioctl_desc *ioctl = NULL; | |
658 | drm_ioctl_t *func; | |
659 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
660 | int retcode = -EINVAL; | |
661 | char stack_kdata[128]; | |
662 | char *kdata = NULL; | |
663 | unsigned int usize, asize; | |
664 | ||
665 | dev = file_priv->minor->dev; | |
666 | ||
667 | if (drm_device_is_unplugged(dev)) | |
668 | return -ENODEV; | |
669 | ||
670 | if ((nr >= DRM_CORE_IOCTL_COUNT) && | |
671 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) | |
672 | goto err_i1; | |
673 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && | |
674 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { | |
675 | u32 drv_size; | |
676 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; | |
677 | drv_size = _IOC_SIZE(ioctl->cmd_drv); | |
678 | usize = asize = _IOC_SIZE(cmd); | |
679 | if (drv_size > asize) | |
680 | asize = drv_size; | |
681 | cmd = ioctl->cmd_drv; | |
682 | } | |
683 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { | |
684 | u32 drv_size; | |
685 | ||
686 | ioctl = &drm_ioctls[nr]; | |
687 | ||
688 | drv_size = _IOC_SIZE(ioctl->cmd); | |
689 | usize = asize = _IOC_SIZE(cmd); | |
690 | if (drv_size > asize) | |
691 | asize = drv_size; | |
692 | ||
693 | cmd = ioctl->cmd; | |
694 | } else | |
695 | goto err_i1; | |
696 | ||
697 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", | |
698 | task_pid_nr(current), | |
699 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
700 | file_priv->authenticated, ioctl->name); | |
701 | ||
702 | /* Do not trust userspace, use our own definition */ | |
703 | func = ioctl->func; | |
704 | ||
705 | if (unlikely(!func)) { | |
706 | DRM_DEBUG("no function\n"); | |
707 | retcode = -EINVAL; | |
708 | goto err_i1; | |
709 | } | |
710 | ||
711 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); | |
712 | if (unlikely(retcode)) | |
713 | goto err_i1; | |
714 | ||
715 | if (cmd & (IOC_IN | IOC_OUT)) { | |
716 | if (asize <= sizeof(stack_kdata)) { | |
717 | kdata = stack_kdata; | |
718 | } else { | |
719 | kdata = kmalloc(asize, GFP_KERNEL); | |
720 | if (!kdata) { | |
721 | retcode = -ENOMEM; | |
722 | goto err_i1; | |
723 | } | |
724 | } | |
725 | if (asize > usize) | |
726 | memset(kdata + usize, 0, asize - usize); | |
727 | } | |
728 | ||
729 | if (cmd & IOC_IN) { | |
730 | if (copy_from_user(kdata, (void __user *)arg, | |
731 | usize) != 0) { | |
732 | retcode = -EFAULT; | |
733 | goto err_i1; | |
734 | } | |
735 | } else if (cmd & IOC_OUT) { | |
736 | memset(kdata, 0, usize); | |
737 | } | |
738 | ||
739 | if (ioctl->flags & DRM_UNLOCKED) | |
740 | retcode = func(dev, kdata, file_priv); | |
741 | else { | |
742 | mutex_lock(&drm_global_mutex); | |
743 | retcode = func(dev, kdata, file_priv); | |
744 | mutex_unlock(&drm_global_mutex); | |
745 | } | |
746 | ||
747 | if (cmd & IOC_OUT) { | |
748 | if (copy_to_user((void __user *)arg, kdata, | |
749 | usize) != 0) | |
750 | retcode = -EFAULT; | |
751 | } | |
752 | ||
753 | err_i1: | |
754 | if (!ioctl) | |
755 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", | |
756 | task_pid_nr(current), | |
757 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
758 | file_priv->authenticated, cmd, nr); | |
759 | ||
760 | if (kdata != stack_kdata) | |
761 | kfree(kdata); | |
762 | if (retcode) | |
763 | DRM_DEBUG("ret = %d\n", retcode); | |
764 | return retcode; | |
765 | } | |
766 | EXPORT_SYMBOL(drm_ioctl); | |
767 | ||
768 | /** | |
769 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags | |
770 | * | |
771 | * @nr: Ioctl number. | |
772 | * @flags: Where to return the ioctl permission flags | |
773 | */ | |
774 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) | |
775 | { | |
776 | if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || | |
777 | (nr < DRM_COMMAND_BASE)) { | |
778 | *flags = drm_ioctls[nr].flags; | |
779 | return true; | |
780 | } | |
781 | ||
782 | return false; | |
783 | } | |
784 | EXPORT_SYMBOL(drm_ioctl_flags); |