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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> | |
3b96a0b1 | 33 | #include <drm/drm_auth.h> |
e7b96070 | 34 | #include "drm_legacy.h" |
18882995 | 35 | #include "drm_internal.h" |
a97df1cc | 36 | #include "drm_crtc_internal.h" |
1da177e4 | 37 | |
760285e7 DH |
38 | #include <linux/pci.h> |
39 | #include <linux/export.h> | |
1da177e4 | 40 | |
a3257256 DV |
41 | /** |
42 | * DOC: getunique and setversion story | |
43 | * | |
44 | * BEWARE THE DRAGONS! MIND THE TRAPDOORS! | |
45 | * | |
46 | * In an attempt to warn anyone else who's trying to figure out what's going | |
47 | * on here, I'll try to summarize the story. First things first, let's clear up | |
48 | * the names, because the kernel internals, libdrm and the ioctls are all named | |
49 | * differently: | |
50 | * | |
51 | * - GET_UNIQUE ioctl, implemented by drm_getunique is wrapped up in libdrm | |
52 | * through the drmGetBusid function. | |
53 | * - The libdrm drmSetBusid function is backed by the SET_UNIQUE ioctl. All | |
54 | * that code is nerved in the kernel with drm_invalid_op(). | |
55 | * - The internal set_busid kernel functions and driver callbacks are | |
56 | * exclusively use by the SET_VERSION ioctl, because only drm 1.0 (which is | |
57 | * nerved) allowed userspace to set the busid through the above ioctl. | |
58 | * - Other ioctls and functions involved are named consistently. | |
59 | * | |
60 | * For anyone wondering what's the difference between drm 1.1 and 1.4: Correctly | |
61 | * handling pci domains in the busid on ppc. Doing this correctly was only | |
62 | * implemented in libdrm in 2010, hence can't be nerved yet. No one knows what's | |
63 | * special with drm 1.2 and 1.3. | |
64 | * | |
65 | * Now the actual horror story of how device lookup in drm works. At large, | |
66 | * there's 2 different ways, either by busid, or by device driver name. | |
67 | * | |
68 | * Opening by busid is fairly simple: | |
69 | * | |
70 | * 1. First call SET_VERSION to make sure pci domains are handled properly. As a | |
71 | * side-effect this fills out the unique name in the master structure. | |
72 | * 2. Call GET_UNIQUE to read out the unique name from the master structure, | |
73 | * which matches the busid thanks to step 1. If it doesn't, proceed to try | |
74 | * the next device node. | |
75 | * | |
76 | * Opening by name is slightly different: | |
77 | * | |
78 | * 1. Directly call VERSION to get the version and to match against the driver | |
79 | * name returned by that ioctl. Note that SET_VERSION is not called, which | |
80 | * means the the unique name for the master node just opening is _not_ filled | |
81 | * out. This despite that with current drm device nodes are always bound to | |
82 | * one device, and can't be runtime assigned like with drm 1.0. | |
83 | * 2. Match driver name. If it mismatches, proceed to the next device node. | |
84 | * 3. Call GET_UNIQUE, and check whether the unique name has length zero (by | |
85 | * checking that the first byte in the string is 0). If that's not the case | |
86 | * libdrm skips and proceeds to the next device node. Probably this is just | |
87 | * copypasta from drm 1.0 times where a set unique name meant that the driver | |
88 | * was in use already, but that's just conjecture. | |
89 | * | |
90 | * Long story short: To keep the open by name logic working, GET_UNIQUE must | |
91 | * _not_ return a unique string when SET_VERSION hasn't been called yet, | |
92 | * otherwise libdrm breaks. Even when that unique string can't ever change, and | |
93 | * is totally irrelevant for actually opening the device because runtime | |
94 | * assignable device instances were only support in drm 1.0, which is long dead. | |
95 | * But the libdrm code in drmOpenByName somehow survived, hence this can't be | |
96 | * broken. | |
97 | */ | |
98 | ||
ec8f112d DH |
99 | static int drm_version(struct drm_device *dev, void *data, |
100 | struct drm_file *file_priv); | |
101 | ||
0aaf20cf | 102 | /* |
1da177e4 | 103 | * Get the bus id. |
b5e89ed5 | 104 | * |
1da177e4 | 105 | * \param inode device inode. |
6c340eac | 106 | * \param file_priv DRM file private. |
1da177e4 LT |
107 | * \param cmd command. |
108 | * \param arg user argument, pointing to a drm_unique structure. | |
109 | * \return zero on success or a negative number on failure. | |
110 | * | |
111 | * Copies the bus id from drm_device::unique into user space. | |
112 | */ | |
78238757 | 113 | static int drm_getunique(struct drm_device *dev, void *data, |
c153f45f | 114 | struct drm_file *file_priv) |
1da177e4 | 115 | { |
c153f45f | 116 | struct drm_unique *u = data; |
7c1c2871 | 117 | struct drm_master *master = file_priv->master; |
1da177e4 | 118 | |
7c1c2871 DA |
119 | if (u->unique_len >= master->unique_len) { |
120 | if (copy_to_user(u->unique, master->unique, master->unique_len)) | |
1da177e4 LT |
121 | return -EFAULT; |
122 | } | |
7c1c2871 | 123 | u->unique_len = master->unique_len; |
c153f45f | 124 | |
1da177e4 LT |
125 | return 0; |
126 | } | |
127 | ||
3fb688fd CW |
128 | static void |
129 | drm_unset_busid(struct drm_device *dev, | |
130 | struct drm_master *master) | |
131 | { | |
3fb688fd CW |
132 | kfree(master->unique); |
133 | master->unique = NULL; | |
134 | master->unique_len = 0; | |
3fb688fd CW |
135 | } |
136 | ||
7c1c2871 | 137 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 138 | { |
7c1c2871 | 139 | struct drm_master *master = file_priv->master; |
8410ea3b | 140 | int ret; |
3fb688fd CW |
141 | |
142 | if (master->unique != NULL) | |
143 | drm_unset_busid(dev, master); | |
fe34765b | 144 | |
915b4d11 DH |
145 | if (dev->driver->set_busid) { |
146 | ret = dev->driver->set_busid(dev, master); | |
147 | if (ret) { | |
148 | drm_unset_busid(dev, master); | |
149 | return ret; | |
150 | } | |
ca8e2ad7 | 151 | } else { |
5079c464 | 152 | WARN_ON(!dev->unique); |
ca8e2ad7 TR |
153 | master->unique = kstrdup(dev->unique, GFP_KERNEL); |
154 | if (master->unique) | |
155 | master->unique_len = strlen(dev->unique); | |
156 | } | |
157 | ||
1da177e4 LT |
158 | return 0; |
159 | } | |
160 | ||
0aaf20cf | 161 | /* |
1da177e4 LT |
162 | * Get client information. |
163 | * | |
164 | * \param inode device inode. | |
6c340eac | 165 | * \param file_priv DRM file private. |
1da177e4 LT |
166 | * \param cmd command. |
167 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 168 | * |
1da177e4 LT |
169 | * \return zero on success or a negative number on failure. |
170 | * | |
171 | * Searches for the client with the specified index and copies its information | |
172 | * into userspace | |
173 | */ | |
78238757 | 174 | static int drm_getclient(struct drm_device *dev, void *data, |
c153f45f | 175 | struct drm_file *file_priv) |
1da177e4 | 176 | { |
c153f45f | 177 | struct drm_client *client = data; |
09b4ea47 | 178 | |
719524df DV |
179 | /* |
180 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools | |
181 | * not breaking completely. Userspace tools stop enumerating one they | |
182 | * get -EINVAL, hence this is the return value we need to hand back for | |
183 | * no clients tracked. | |
184 | * | |
185 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun | |
186 | * attempt to figure out whether they're authenticated or not. Since | |
187 | * that's the only thing they care about, give it to the directly | |
188 | * instead of walking one giant list. | |
189 | */ | |
190 | if (client->idx == 0) { | |
191 | client->auth = file_priv->authenticated; | |
192 | client->pid = pid_vnr(file_priv->pid); | |
193 | client->uid = from_kuid_munged(current_user_ns(), | |
194 | file_priv->uid); | |
195 | client->magic = 0; | |
196 | client->iocs = 0; | |
197 | ||
198 | return 0; | |
199 | } else { | |
200 | return -EINVAL; | |
bd1b331f | 201 | } |
1da177e4 LT |
202 | } |
203 | ||
0aaf20cf | 204 | /* |
b5e89ed5 DA |
205 | * Get statistics information. |
206 | * | |
1da177e4 | 207 | * \param inode device inode. |
6c340eac | 208 | * \param file_priv DRM file private. |
1da177e4 LT |
209 | * \param cmd command. |
210 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 211 | * |
1da177e4 LT |
212 | * \return zero on success or a negative number on failure. |
213 | */ | |
78238757 | 214 | static int drm_getstats(struct drm_device *dev, void *data, |
c153f45f | 215 | struct drm_file *file_priv) |
1da177e4 | 216 | { |
c153f45f | 217 | struct drm_stats *stats = data; |
1da177e4 | 218 | |
d79cdc83 | 219 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 220 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 221 | |
1da177e4 LT |
222 | return 0; |
223 | } | |
224 | ||
0aaf20cf | 225 | /* |
9f35421e BS |
226 | * Get device/driver capabilities |
227 | */ | |
78238757 | 228 | static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
9f35421e BS |
229 | { |
230 | struct drm_get_cap *req = data; | |
231 | ||
232 | req->value = 0; | |
e73f88af DA |
233 | switch (req->capability) { |
234 | case DRM_CAP_DUMB_BUFFER: | |
235 | if (dev->driver->dumb_create) | |
236 | req->value = 1; | |
237 | break; | |
51eab416 | 238 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
239 | req->value = 1; |
240 | break; | |
019d96cb DA |
241 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
242 | req->value = dev->mode_config.preferred_depth; | |
243 | break; | |
244 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
245 | req->value = dev->mode_config.prefer_shadow; | |
246 | break; | |
4271a409 DA |
247 | case DRM_CAP_PRIME: |
248 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
249 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
250 | break; | |
c61eef72 ID |
251 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
252 | req->value = drm_timestamp_monotonic; | |
253 | break; | |
62f2104f KP |
254 | case DRM_CAP_ASYNC_PAGE_FLIP: |
255 | req->value = dev->mode_config.async_page_flip; | |
256 | break; | |
8716ed4e AD |
257 | case DRM_CAP_CURSOR_WIDTH: |
258 | if (dev->mode_config.cursor_width) | |
259 | req->value = dev->mode_config.cursor_width; | |
260 | else | |
261 | req->value = 64; | |
262 | break; | |
263 | case DRM_CAP_CURSOR_HEIGHT: | |
264 | if (dev->mode_config.cursor_height) | |
265 | req->value = dev->mode_config.cursor_height; | |
266 | else | |
267 | req->value = 64; | |
268 | break; | |
e3eb3250 RC |
269 | case DRM_CAP_ADDFB2_MODIFIERS: |
270 | req->value = dev->mode_config.allow_fb_modifiers; | |
271 | break; | |
e73f88af DA |
272 | default: |
273 | return -EINVAL; | |
274 | } | |
9f35421e BS |
275 | return 0; |
276 | } | |
277 | ||
0aaf20cf | 278 | /* |
1c0814fe DL |
279 | * Set device/driver capabilities |
280 | */ | |
78238757 | 281 | static int |
1c0814fe DL |
282 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) |
283 | { | |
61d8e328 DL |
284 | struct drm_set_client_cap *req = data; |
285 | ||
286 | switch (req->capability) { | |
287 | case DRM_CLIENT_CAP_STEREO_3D: | |
288 | if (req->value > 1) | |
289 | return -EINVAL; | |
290 | file_priv->stereo_allowed = req->value; | |
291 | break; | |
681e7ec7 | 292 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
681e7ec7 MR |
293 | if (req->value > 1) |
294 | return -EINVAL; | |
295 | file_priv->universal_planes = req->value; | |
296 | break; | |
88a48e29 | 297 | case DRM_CLIENT_CAP_ATOMIC: |
88a48e29 RC |
298 | if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) |
299 | return -EINVAL; | |
300 | if (req->value > 1) | |
301 | return -EINVAL; | |
302 | file_priv->atomic = req->value; | |
179f158c | 303 | file_priv->universal_planes = req->value; |
88a48e29 | 304 | break; |
61d8e328 DL |
305 | default: |
306 | return -EINVAL; | |
307 | } | |
308 | ||
309 | return 0; | |
1c0814fe DL |
310 | } |
311 | ||
0aaf20cf | 312 | /* |
1da177e4 LT |
313 | * Setversion ioctl. |
314 | * | |
315 | * \param inode device inode. | |
6c340eac | 316 | * \param file_priv DRM file private. |
1da177e4 LT |
317 | * \param cmd command. |
318 | * \param arg user argument, pointing to a drm_lock structure. | |
319 | * \return zero on success or negative number on failure. | |
320 | * | |
321 | * Sets the requested interface version | |
322 | */ | |
78238757 | 323 | static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 324 | { |
c153f45f EA |
325 | struct drm_set_version *sv = data; |
326 | int if_version, retcode = 0; | |
327 | ||
328 | if (sv->drm_di_major != -1) { | |
329 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
330 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
331 | retcode = -EINVAL; | |
332 | goto done; | |
333 | } | |
334 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
335 | sv->drm_di_minor); | |
3d77461e | 336 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 337 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
338 | /* |
339 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 340 | * Version 1.4 has proper PCI domain support |
1da177e4 | 341 | */ |
3fb688fd CW |
342 | retcode = drm_set_busid(dev, file_priv); |
343 | if (retcode) | |
344 | goto done; | |
1da177e4 LT |
345 | } |
346 | } | |
347 | ||
c153f45f EA |
348 | if (sv->drm_dd_major != -1) { |
349 | if (sv->drm_dd_major != dev->driver->major || | |
350 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
351 | dev->driver->minor) { | |
352 | retcode = -EINVAL; | |
353 | goto done; | |
354 | } | |
1da177e4 | 355 | } |
c153f45f EA |
356 | |
357 | done: | |
358 | sv->drm_di_major = DRM_IF_MAJOR; | |
359 | sv->drm_di_minor = DRM_IF_MINOR; | |
360 | sv->drm_dd_major = dev->driver->major; | |
361 | sv->drm_dd_minor = dev->driver->minor; | |
362 | ||
363 | return retcode; | |
1da177e4 LT |
364 | } |
365 | ||
0aaf20cf DV |
366 | /** |
367 | * drm_noop - DRM no-op ioctl implemntation | |
368 | * @dev: DRM device for the ioctl | |
369 | * @data: data pointer for the ioctl | |
370 | * @file_priv: DRM file for the ioctl call | |
371 | * | |
372 | * This no-op implementation for drm ioctls is useful for deprecated | |
373 | * functionality where we can't return a failure code because existing userspace | |
374 | * checks the result of the ioctl, but doesn't care about the action. | |
375 | * | |
376 | * Always returns successfully with 0. | |
377 | */ | |
c153f45f EA |
378 | int drm_noop(struct drm_device *dev, void *data, |
379 | struct drm_file *file_priv) | |
1da177e4 LT |
380 | { |
381 | DRM_DEBUG("\n"); | |
382 | return 0; | |
383 | } | |
b2c606fe | 384 | EXPORT_SYMBOL(drm_noop); |
ec8f112d | 385 | |
0aaf20cf DV |
386 | /** |
387 | * drm_invalid_op - DRM invalid ioctl implemntation | |
388 | * @dev: DRM device for the ioctl | |
389 | * @data: data pointer for the ioctl | |
390 | * @file_priv: DRM file for the ioctl call | |
391 | * | |
392 | * This no-op implementation for drm ioctls is useful for deprecated | |
393 | * functionality where we really don't want to allow userspace to call the ioctl | |
394 | * any more. This is the case for old ums interfaces for drivers that | |
395 | * transitioned to kms gradually and so kept the old legacy tables around. This | |
396 | * only applies to radeon and i915 kms drivers, other drivers shouldn't need to | |
397 | * use this function. | |
398 | * | |
399 | * Always fails with a return value of -EINVAL. | |
400 | */ | |
4b63539b DV |
401 | int drm_invalid_op(struct drm_device *dev, void *data, |
402 | struct drm_file *file_priv) | |
403 | { | |
404 | return -EINVAL; | |
405 | } | |
406 | EXPORT_SYMBOL(drm_invalid_op); | |
407 | ||
0aaf20cf | 408 | /* |
ec8f112d DH |
409 | * Copy and IOCTL return string to user space |
410 | */ | |
411 | static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) | |
412 | { | |
413 | int len; | |
414 | ||
415 | /* don't overflow userbuf */ | |
416 | len = strlen(value); | |
417 | if (len > *buf_len) | |
418 | len = *buf_len; | |
419 | ||
420 | /* let userspace know exact length of driver value (which could be | |
421 | * larger than the userspace-supplied buffer) */ | |
422 | *buf_len = strlen(value); | |
423 | ||
424 | /* finally, try filling in the userbuf */ | |
425 | if (len && buf) | |
426 | if (copy_to_user(buf, value, len)) | |
427 | return -EFAULT; | |
428 | return 0; | |
429 | } | |
430 | ||
0aaf20cf | 431 | /* |
ec8f112d DH |
432 | * Get version information |
433 | * | |
434 | * \param inode device inode. | |
435 | * \param filp file pointer. | |
436 | * \param cmd command. | |
437 | * \param arg user argument, pointing to a drm_version structure. | |
438 | * \return zero on success or negative number on failure. | |
439 | * | |
440 | * Fills in the version information in \p arg. | |
441 | */ | |
442 | static int drm_version(struct drm_device *dev, void *data, | |
443 | struct drm_file *file_priv) | |
444 | { | |
445 | struct drm_version *version = data; | |
446 | int err; | |
447 | ||
448 | version->version_major = dev->driver->major; | |
449 | version->version_minor = dev->driver->minor; | |
450 | version->version_patchlevel = dev->driver->patchlevel; | |
451 | err = drm_copy_field(version->name, &version->name_len, | |
452 | dev->driver->name); | |
453 | if (!err) | |
454 | err = drm_copy_field(version->date, &version->date_len, | |
455 | dev->driver->date); | |
456 | if (!err) | |
457 | err = drm_copy_field(version->desc, &version->desc_len, | |
458 | dev->driver->desc); | |
459 | ||
460 | return err; | |
461 | } | |
462 | ||
0aaf20cf | 463 | /* |
ec8f112d DH |
464 | * drm_ioctl_permit - Check ioctl permissions against caller |
465 | * | |
466 | * @flags: ioctl permission flags. | |
467 | * @file_priv: Pointer to struct drm_file identifying the caller. | |
468 | * | |
469 | * Checks whether the caller is allowed to run an ioctl with the | |
470 | * indicated permissions. If so, returns zero. Otherwise returns an | |
471 | * error code suitable for ioctl return. | |
472 | */ | |
5101020c | 473 | int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) |
ec8f112d DH |
474 | { |
475 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ | |
476 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) | |
477 | return -EACCES; | |
478 | ||
479 | /* AUTH is only for authenticated or render client */ | |
480 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && | |
481 | !file_priv->authenticated)) | |
482 | return -EACCES; | |
483 | ||
484 | /* MASTER is only for master or control clients */ | |
b3ac9f25 DV |
485 | if (unlikely((flags & DRM_MASTER) && |
486 | !drm_is_current_master(file_priv) && | |
ec8f112d DH |
487 | !drm_is_control_client(file_priv))) |
488 | return -EACCES; | |
489 | ||
490 | /* Control clients must be explicitly allowed */ | |
491 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && | |
492 | drm_is_control_client(file_priv))) | |
493 | return -EACCES; | |
494 | ||
495 | /* Render clients must be explicitly allowed */ | |
496 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && | |
497 | drm_is_render_client(file_priv))) | |
498 | return -EACCES; | |
499 | ||
500 | return 0; | |
501 | } | |
5101020c | 502 | EXPORT_SYMBOL(drm_ioctl_permit); |
ec8f112d | 503 | |
066626d5 EV |
504 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ |
505 | [DRM_IOCTL_NR(ioctl)] = { \ | |
506 | .cmd = ioctl, \ | |
507 | .func = _func, \ | |
508 | .flags = _flags, \ | |
509 | .name = #ioctl \ | |
510 | } | |
78238757 | 511 | |
0aaf20cf | 512 | /* Ioctl table */ |
78238757 | 513 | static const struct drm_ioctl_desc drm_ioctls[] = { |
30c64664 TH |
514 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, |
515 | DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW), | |
78238757 | 516 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), |
94e86f5d | 517 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, DRM_UNLOCKED), |
78238757 | 518 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), |
ec1f52ef | 519 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED), |
78238757 DV |
520 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), |
521 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), | |
522 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
523 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), | |
524 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), | |
525 | ||
46bfdf9a | 526 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_invalid_op, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
78238757 DV |
527 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
528 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
94e86f5d | 529 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_UNLOCKED|DRM_MASTER), |
78238757 DV |
530 | |
531 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
532 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), | |
533 | ||
534 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
535 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), | |
536 | ||
ce833ba9 DV |
537 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY), |
538 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY), | |
78238757 DV |
539 | |
540 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), | |
541 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
542 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
543 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), | |
544 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
545 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
546 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), | |
547 | ||
548 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
549 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
550 | ||
551 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), | |
552 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), | |
553 | ||
554 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
555 | ||
556 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
557 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
558 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), | |
559 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), | |
560 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), | |
561 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), | |
562 | ||
563 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
564 | ||
a7fb8a23 | 565 | #if IS_ENABLED(CONFIG_AGP) |
78238757 DV |
566 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
567 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
568 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
569 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), | |
570 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
571 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
572 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
573 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
574 | #endif | |
575 | ||
576 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
577 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
578 | ||
579 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), | |
580 | ||
581 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), | |
582 | ||
583 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
584 | ||
585 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
586 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
587 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
588 | ||
589 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
590 | ||
591 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
592 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
593 | ||
594 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
595 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
596 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
597 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
598 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
599 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
600 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), | |
601 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), | |
602 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
603 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
604 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
605 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
606 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
607 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
608 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
609 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
610 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
611 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
612 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
613 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
614 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
615 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
616 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
617 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
618 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
619 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
620 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
d34f20d6 | 621 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
e2f5d2ea DS |
622 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
623 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
78238757 DV |
624 | }; |
625 | ||
626 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) | |
627 | ||
ec8f112d | 628 | /** |
0aaf20cf DV |
629 | * drm_ioctl - ioctl callback implementation for DRM drivers |
630 | * @filp: file this ioctl is called on | |
631 | * @cmd: ioctl cmd number | |
632 | * @arg: user argument | |
ec8f112d DH |
633 | * |
634 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
635 | * previleges if so required, and dispatches to the respective function. | |
0aaf20cf DV |
636 | * |
637 | * Returns: | |
638 | * Zero on success, negative error code on failure. | |
ec8f112d DH |
639 | */ |
640 | long drm_ioctl(struct file *filp, | |
641 | unsigned int cmd, unsigned long arg) | |
642 | { | |
643 | struct drm_file *file_priv = filp->private_data; | |
644 | struct drm_device *dev; | |
645 | const struct drm_ioctl_desc *ioctl = NULL; | |
646 | drm_ioctl_t *func; | |
647 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
648 | int retcode = -EINVAL; | |
649 | char stack_kdata[128]; | |
650 | char *kdata = NULL; | |
01d3434a | 651 | unsigned int in_size, out_size, drv_size, ksize; |
ea487835 | 652 | bool is_driver_ioctl; |
ec8f112d DH |
653 | |
654 | dev = file_priv->minor->dev; | |
655 | ||
656 | if (drm_device_is_unplugged(dev)) | |
657 | return -ENODEV; | |
658 | ||
ea487835 DV |
659 | is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END; |
660 | ||
661 | if (is_driver_ioctl) { | |
83be0038 VS |
662 | /* driver ioctl */ |
663 | if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls) | |
664 | goto err_i1; | |
ec8f112d | 665 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; |
83be0038 VS |
666 | } else { |
667 | /* core ioctl */ | |
668 | if (nr >= DRM_CORE_IOCTL_COUNT) | |
669 | goto err_i1; | |
ec8f112d | 670 | ioctl = &drm_ioctls[nr]; |
83be0038 | 671 | } |
ec8f112d | 672 | |
83be0038 | 673 | drv_size = _IOC_SIZE(ioctl->cmd); |
01d3434a CW |
674 | out_size = in_size = _IOC_SIZE(cmd); |
675 | if ((cmd & ioctl->cmd & IOC_IN) == 0) | |
676 | in_size = 0; | |
677 | if ((cmd & ioctl->cmd & IOC_OUT) == 0) | |
678 | out_size = 0; | |
679 | ksize = max(max(in_size, out_size), drv_size); | |
ec8f112d DH |
680 | |
681 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", | |
682 | task_pid_nr(current), | |
683 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
684 | file_priv->authenticated, ioctl->name); | |
685 | ||
686 | /* Do not trust userspace, use our own definition */ | |
687 | func = ioctl->func; | |
688 | ||
689 | if (unlikely(!func)) { | |
690 | DRM_DEBUG("no function\n"); | |
691 | retcode = -EINVAL; | |
692 | goto err_i1; | |
693 | } | |
694 | ||
695 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); | |
696 | if (unlikely(retcode)) | |
697 | goto err_i1; | |
698 | ||
01d3434a CW |
699 | if (ksize <= sizeof(stack_kdata)) { |
700 | kdata = stack_kdata; | |
701 | } else { | |
702 | kdata = kmalloc(ksize, GFP_KERNEL); | |
703 | if (!kdata) { | |
704 | retcode = -ENOMEM; | |
705 | goto err_i1; | |
ec8f112d | 706 | } |
ec8f112d DH |
707 | } |
708 | ||
01d3434a CW |
709 | if (copy_from_user(kdata, (void __user *)arg, in_size) != 0) { |
710 | retcode = -EFAULT; | |
711 | goto err_i1; | |
ec8f112d DH |
712 | } |
713 | ||
01d3434a CW |
714 | if (ksize > in_size) |
715 | memset(kdata + in_size, 0, ksize - in_size); | |
716 | ||
ea487835 DV |
717 | /* Enforce sane locking for kms driver ioctls. Core ioctls are |
718 | * too messy still. */ | |
719 | if ((drm_core_check_feature(dev, DRIVER_MODESET) && is_driver_ioctl) || | |
720 | (ioctl->flags & DRM_UNLOCKED)) | |
ec8f112d DH |
721 | retcode = func(dev, kdata, file_priv); |
722 | else { | |
723 | mutex_lock(&drm_global_mutex); | |
724 | retcode = func(dev, kdata, file_priv); | |
725 | mutex_unlock(&drm_global_mutex); | |
726 | } | |
727 | ||
01d3434a CW |
728 | if (copy_to_user((void __user *)arg, kdata, out_size) != 0) |
729 | retcode = -EFAULT; | |
ec8f112d DH |
730 | |
731 | err_i1: | |
732 | if (!ioctl) | |
733 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", | |
734 | task_pid_nr(current), | |
735 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
736 | file_priv->authenticated, cmd, nr); | |
737 | ||
738 | if (kdata != stack_kdata) | |
739 | kfree(kdata); | |
740 | if (retcode) | |
741 | DRM_DEBUG("ret = %d\n", retcode); | |
742 | return retcode; | |
743 | } | |
744 | EXPORT_SYMBOL(drm_ioctl); | |
745 | ||
746 | /** | |
747 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags | |
0aaf20cf DV |
748 | * @nr: ioctl number |
749 | * @flags: where to return the ioctl permission flags | |
750 | * | |
751 | * This ioctl is only used by the vmwgfx driver to augment the access checks | |
752 | * done by the drm core and insofar a pretty decent layering violation. This | |
753 | * shouldn't be used by any drivers. | |
ec8f112d | 754 | * |
0aaf20cf | 755 | * Returns: |
2ae99588 | 756 | * True if the @nr corresponds to a DRM core ioctl number, false otherwise. |
ec8f112d DH |
757 | */ |
758 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) | |
759 | { | |
7ef5f82b VS |
760 | if (nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END) |
761 | return false; | |
762 | ||
763 | if (nr >= DRM_CORE_IOCTL_COUNT) | |
764 | return false; | |
ec8f112d | 765 | |
7ef5f82b VS |
766 | *flags = drm_ioctls[nr].flags; |
767 | return true; | |
ec8f112d DH |
768 | } |
769 | EXPORT_SYMBOL(drm_ioctl_flags); |