blob: a28c0abd1a38e119af4857f294663bd9350ba392 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
David Herrmannec8f1122014-07-23 14:14:53 +02008 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Author Gareth Hughes <gareth@valinux.com>
10 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * 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
David Howells760285e2012-10-02 18:01:07 +010031#include <drm/drmP.h>
32#include <drm/drm_core.h>
David Herrmanne7b960702014-07-24 12:10:04 +020033#include "drm_legacy.h"
Daniel Vetter18882992014-09-10 08:16:10 +020034#include "drm_internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
David Howells760285e2012-10-02 18:01:07 +010036#include <linux/pci.h>
37#include <linux/export.h>
Andy Lutomirski0dd99f12013-05-13 23:58:48 +000038#ifdef CONFIG_X86
39#include <asm/mtrr.h>
40#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
David Herrmannec8f1122014-07-23 14:14:53 +020042static int drm_version(struct drm_device *dev, void *data,
43 struct drm_file *file_priv);
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045/**
46 * Get the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100047 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100049 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 * \param cmd command.
51 * \param arg user argument, pointing to a drm_unique structure.
52 * \return zero on success or a negative number on failure.
53 *
54 * Copies the bus id from drm_device::unique into user space.
55 */
Daniel Vetter78238752014-09-10 12:43:55 +020056static int drm_getunique(struct drm_device *dev, void *data,
Eric Anholtc153f452007-09-03 12:06:45 +100057 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Eric Anholtc153f452007-09-03 12:06:45 +100059 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +100060 struct drm_master *master = file_priv->master;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Dave Airlie7c1c2872008-11-28 14:22:24 +100062 if (u->unique_len >= master->unique_len) {
63 if (copy_to_user(u->unique, master->unique, master->unique_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 return -EFAULT;
65 }
Dave Airlie7c1c2872008-11-28 14:22:24 +100066 u->unique_len = master->unique_len;
Eric Anholtc153f452007-09-03 12:06:45 +100067
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 return 0;
69}
70
Chris Wilson3fb688f2010-08-04 11:09:42 +010071static void
72drm_unset_busid(struct drm_device *dev,
73 struct drm_master *master)
74{
Chris Wilson3fb688f2010-08-04 11:09:42 +010075 kfree(master->unique);
76 master->unique = NULL;
77 master->unique_len = 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +010078}
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080/**
81 * Set the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100082 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100084 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 * \param cmd command.
86 * \param arg user argument, pointing to a drm_unique structure.
87 * \return zero on success or a negative number on failure.
88 *
89 * Copies the bus id from userspace into drm_device::unique, and verifies that
90 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
91 * in interface version 1.1 and will return EBUSY when setversion has requested
Daniel Vetter53bf2a22013-11-03 21:47:18 +010092 * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
93 * UMS was only ever supported on pci devices.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 */
Daniel Vetter78238752014-09-10 12:43:55 +020095static int drm_setunique(struct drm_device *dev, void *data,
Eric Anholtc153f452007-09-03 12:06:45 +100096 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
Eric Anholtc153f452007-09-03 12:06:45 +100098 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +100099 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000100 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Dave Airlie7c1c2872008-11-28 14:22:24 +1000102 if (master->unique_len || master->unique)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000103 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Eric Anholtc153f452007-09-03 12:06:45 +1000105 if (!u->unique_len || u->unique_len > 1024)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000106 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100108 if (drm_core_check_feature(dev, DRIVER_MODESET))
109 return 0;
110
111 if (WARN_ON(!dev->pdev))
Dave Airlie8410ea32010-12-15 03:16:38 +1000112 return -EINVAL;
113
Daniel Vetter53bf2a22013-11-03 21:47:18 +0100114 ret = drm_pci_set_unique(dev, master, u);
Dave Airlie8410ea32010-12-15 03:16:38 +1000115 if (ret)
Chris Wilson3fb688f2010-08-04 11:09:42 +0100116 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118 return 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100119
120err:
121 drm_unset_busid(dev, master);
122 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123}
124
Dave Airlie7c1c2872008-11-28 14:22:24 +1000125static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
Dave Airlie7c1c2872008-11-28 14:22:24 +1000127 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000128 int ret;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100129
130 if (master->unique != NULL)
131 drm_unset_busid(dev, master);
Dave Airliefe347652006-01-02 21:19:39 +1100132
David Herrmann915b4d12014-08-29 12:12:43 +0200133 if (dev->driver->set_busid) {
134 ret = dev->driver->set_busid(dev, master);
135 if (ret) {
136 drm_unset_busid(dev, master);
137 return ret;
138 }
Thierry Redingca8e2ad2014-04-11 15:23:00 +0200139 } else {
140 if (WARN(dev->unique == NULL,
David Herrmannc5786fe2014-08-29 12:12:44 +0200141 "No drm_driver.set_busid() implementation provided by "
Thierry Redingca8e2ad2014-04-11 15:23:00 +0200142 "%ps. Use drm_dev_set_unique() to set the unique "
143 "name explicitly.", dev->driver))
144 return -EINVAL;
145
146 master->unique = kstrdup(dev->unique, GFP_KERNEL);
147 if (master->unique)
148 master->unique_len = strlen(dev->unique);
149 }
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 return 0;
152}
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154/**
155 * Get a mapping information.
156 *
157 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000158 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 * \param cmd command.
160 * \param arg user argument, pointing to a drm_map structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000161 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 * \return zero on success or a negative number on failure.
163 *
164 * Searches for the mapping with the specified offset and copies its information
165 * into userspace
166 */
Daniel Vetter78238752014-09-10 12:43:55 +0200167static int drm_getmap(struct drm_device *dev, void *data,
Eric Anholtc153f452007-09-03 12:06:45 +1000168 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
Eric Anholtc153f452007-09-03 12:06:45 +1000170 struct drm_map *map = data;
Dave Airlie55910512007-07-11 16:53:40 +1000171 struct drm_map_list *r_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 struct list_head *list;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000173 int idx;
174 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Eric Anholtc153f452007-09-03 12:06:45 +1000176 idx = map->offset;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400177 if (idx < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 i = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400181 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000182 list_for_each(list, &dev->maplist) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000183 if (i == idx) {
Dave Airlie55910512007-07-11 16:53:40 +1000184 r_list = list_entry(list, struct drm_map_list, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 break;
186 }
187 i++;
188 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000189 if (!r_list || !r_list->map) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100190 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 return -EINVAL;
192 }
193
Eric Anholtc153f452007-09-03 12:06:45 +1000194 map->offset = r_list->map->offset;
195 map->size = r_list->map->size;
196 map->type = r_list->map->type;
197 map->flags = r_list->map->flags;
198 map->handle = (void *)(unsigned long) r_list->user_token;
Andy Lutomirski0dd99f12013-05-13 23:58:48 +0000199
200#ifdef CONFIG_X86
201 /*
202 * There appears to be exactly one user of the mtrr index: dritest.
203 * It's easy enough to keep it working on non-PAT systems.
204 */
205 map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
206#else
207 map->mtrr = -1;
208#endif
209
Dave Airlie30e2fb12006-02-02 19:37:46 +1100210 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 return 0;
213}
214
215/**
216 * Get client information.
217 *
218 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000219 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 * \param cmd command.
221 * \param arg user argument, pointing to a drm_client structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000222 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 * \return zero on success or a negative number on failure.
224 *
225 * Searches for the client with the specified index and copies its information
226 * into userspace
227 */
Daniel Vetter78238752014-09-10 12:43:55 +0200228static int drm_getclient(struct drm_device *dev, void *data,
Eric Anholtc153f452007-09-03 12:06:45 +1000229 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Eric Anholtc153f452007-09-03 12:06:45 +1000231 struct drm_client *client = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Daniel Vetter719524d2013-08-08 15:41:31 +0200233 /*
234 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
235 * not breaking completely. Userspace tools stop enumerating one they
236 * get -EINVAL, hence this is the return value we need to hand back for
237 * no clients tracked.
238 *
239 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
240 * attempt to figure out whether they're authenticated or not. Since
241 * that's the only thing they care about, give it to the directly
242 * instead of walking one giant list.
243 */
244 if (client->idx == 0) {
245 client->auth = file_priv->authenticated;
246 client->pid = pid_vnr(file_priv->pid);
247 client->uid = from_kuid_munged(current_user_ns(),
248 file_priv->uid);
249 client->magic = 0;
250 client->iocs = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400251
Daniel Vetter719524d2013-08-08 15:41:31 +0200252 return 0;
253 } else {
254 return -EINVAL;
Eric Anholtb018fcd2007-11-22 18:46:54 +1000255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000258/**
259 * Get statistics information.
260 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000262 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 * \param cmd command.
264 * \param arg user argument, pointing to a drm_stats structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000265 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 * \return zero on success or a negative number on failure.
267 */
Daniel Vetter78238752014-09-10 12:43:55 +0200268static int drm_getstats(struct drm_device *dev, void *data,
Eric Anholtc153f452007-09-03 12:06:45 +1000269 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
Eric Anholtc153f452007-09-03 12:06:45 +1000271 struct drm_stats *stats = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Daniel Vetterd79cdc82013-08-08 15:41:32 +0200273 /* Clear stats to prevent userspace from eating its stack garbage. */
Li Zefan246a3d12007-11-05 12:53:09 +1000274 memset(stats, 0, sizeof(*stats));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 return 0;
277}
278
279/**
Ben Skeggs9f354212011-02-21 11:17:35 +1000280 * Get device/driver capabilities
281 */
Daniel Vetter78238752014-09-10 12:43:55 +0200282static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
Ben Skeggs9f354212011-02-21 11:17:35 +1000283{
284 struct drm_get_cap *req = data;
285
286 req->value = 0;
Dave Airliee73f88a2011-03-04 14:50:28 +1000287 switch (req->capability) {
288 case DRM_CAP_DUMB_BUFFER:
289 if (dev->driver->dumb_create)
290 req->value = 1;
291 break;
Dave Airlie51eab412011-03-24 20:54:35 +1000292 case DRM_CAP_VBLANK_HIGH_CRTC:
Ilija Hadzic19b01b52011-03-18 16:58:04 -0500293 req->value = 1;
294 break;
Dave Airlie019d96c2011-09-29 16:20:42 +0100295 case DRM_CAP_DUMB_PREFERRED_DEPTH:
296 req->value = dev->mode_config.preferred_depth;
297 break;
298 case DRM_CAP_DUMB_PREFER_SHADOW:
299 req->value = dev->mode_config.prefer_shadow;
300 break;
Dave Airlie4271a402012-04-02 14:11:50 +0100301 case DRM_CAP_PRIME:
302 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
303 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
304 break;
Imre Deakc61eef72012-10-23 18:53:26 +0000305 case DRM_CAP_TIMESTAMP_MONOTONIC:
306 req->value = drm_timestamp_monotonic;
307 break;
Keith Packard62f21042013-07-22 18:50:00 -0700308 case DRM_CAP_ASYNC_PAGE_FLIP:
309 req->value = dev->mode_config.async_page_flip;
310 break;
Alex Deucher8716ed42014-02-12 12:48:23 -0500311 case DRM_CAP_CURSOR_WIDTH:
312 if (dev->mode_config.cursor_width)
313 req->value = dev->mode_config.cursor_width;
314 else
315 req->value = 64;
316 break;
317 case DRM_CAP_CURSOR_HEIGHT:
318 if (dev->mode_config.cursor_height)
319 req->value = dev->mode_config.cursor_height;
320 else
321 req->value = 64;
322 break;
Dave Airliee73f88a2011-03-04 14:50:28 +1000323 default:
324 return -EINVAL;
325 }
Ben Skeggs9f354212011-02-21 11:17:35 +1000326 return 0;
327}
328
329/**
Damien Lespiau1c0814f2013-09-25 16:45:20 +0100330 * Set device/driver capabilities
331 */
Daniel Vetter78238752014-09-10 12:43:55 +0200332static int
Damien Lespiau1c0814f2013-09-25 16:45:20 +0100333drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
334{
Damien Lespiau61d8e322013-09-25 16:45:22 +0100335 struct drm_set_client_cap *req = data;
336
337 switch (req->capability) {
338 case DRM_CLIENT_CAP_STEREO_3D:
339 if (req->value > 1)
340 return -EINVAL;
341 file_priv->stereo_allowed = req->value;
342 break;
Matt Roper681e7ec2014-04-01 15:22:42 -0700343 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
Matt Roper681e7ec2014-04-01 15:22:42 -0700344 if (req->value > 1)
345 return -EINVAL;
346 file_priv->universal_planes = req->value;
347 break;
Rob Clark88a48e22014-12-18 16:01:50 -0500348 case DRM_CLIENT_CAP_ATOMIC:
349 /* for now, hide behind experimental drm.atomic moduleparam */
350 if (!drm_atomic)
351 return -EINVAL;
352 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
353 return -EINVAL;
354 if (req->value > 1)
355 return -EINVAL;
356 file_priv->atomic = req->value;
357 break;
Damien Lespiau61d8e322013-09-25 16:45:22 +0100358 default:
359 return -EINVAL;
360 }
361
362 return 0;
Damien Lespiau1c0814f2013-09-25 16:45:20 +0100363}
364
365/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 * Setversion ioctl.
367 *
368 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000369 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 * \param cmd command.
371 * \param arg user argument, pointing to a drm_lock structure.
372 * \return zero on success or negative number on failure.
373 *
374 * Sets the requested interface version
375 */
Daniel Vetter78238752014-09-10 12:43:55 +0200376static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377{
Eric Anholtc153f452007-09-03 12:06:45 +1000378 struct drm_set_version *sv = data;
379 int if_version, retcode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Eric Anholtc153f452007-09-03 12:06:45 +1000381 if (sv->drm_di_major != -1) {
382 if (sv->drm_di_major != DRM_IF_MAJOR ||
383 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
384 retcode = -EINVAL;
385 goto done;
386 }
387 if_version = DRM_IF_VERSION(sv->drm_di_major,
388 sv->drm_di_minor);
Dave Airlie3d774612006-08-07 20:07:43 +1000389 dev->if_version = max(if_version, dev->if_version);
Eric Anholtc153f452007-09-03 12:06:45 +1000390 if (sv->drm_di_minor >= 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 /*
392 * Version 1.1 includes tying of DRM to specific device
Benjamin Herrenschmidtc17c2f82010-08-06 13:55:10 +1000393 * Version 1.4 has proper PCI domain support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 */
Chris Wilson3fb688f2010-08-04 11:09:42 +0100395 retcode = drm_set_busid(dev, file_priv);
396 if (retcode)
397 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 }
399 }
400
Eric Anholtc153f452007-09-03 12:06:45 +1000401 if (sv->drm_dd_major != -1) {
402 if (sv->drm_dd_major != dev->driver->major ||
403 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
404 dev->driver->minor) {
405 retcode = -EINVAL;
406 goto done;
407 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
Eric Anholtc153f452007-09-03 12:06:45 +1000409
410done:
411 sv->drm_di_major = DRM_IF_MAJOR;
412 sv->drm_di_minor = DRM_IF_MINOR;
413 sv->drm_dd_major = dev->driver->major;
414 sv->drm_dd_minor = dev->driver->minor;
415
416 return retcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417}
418
419/** No-op ioctl. */
Eric Anholtc153f452007-09-03 12:06:45 +1000420int drm_noop(struct drm_device *dev, void *data,
421 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422{
423 DRM_DEBUG("\n");
424 return 0;
425}
Daniel Vetterb2c606f2012-01-17 12:50:12 +0100426EXPORT_SYMBOL(drm_noop);
David Herrmannec8f1122014-07-23 14:14:53 +0200427
428/**
429 * Copy and IOCTL return string to user space
430 */
431static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
432{
433 int len;
434
435 /* don't overflow userbuf */
436 len = strlen(value);
437 if (len > *buf_len)
438 len = *buf_len;
439
440 /* let userspace know exact length of driver value (which could be
441 * larger than the userspace-supplied buffer) */
442 *buf_len = strlen(value);
443
444 /* finally, try filling in the userbuf */
445 if (len && buf)
446 if (copy_to_user(buf, value, len))
447 return -EFAULT;
448 return 0;
449}
450
451/**
452 * Get version information
453 *
454 * \param inode device inode.
455 * \param filp file pointer.
456 * \param cmd command.
457 * \param arg user argument, pointing to a drm_version structure.
458 * \return zero on success or negative number on failure.
459 *
460 * Fills in the version information in \p arg.
461 */
462static int drm_version(struct drm_device *dev, void *data,
463 struct drm_file *file_priv)
464{
465 struct drm_version *version = data;
466 int err;
467
468 version->version_major = dev->driver->major;
469 version->version_minor = dev->driver->minor;
470 version->version_patchlevel = dev->driver->patchlevel;
471 err = drm_copy_field(version->name, &version->name_len,
472 dev->driver->name);
473 if (!err)
474 err = drm_copy_field(version->date, &version->date_len,
475 dev->driver->date);
476 if (!err)
477 err = drm_copy_field(version->desc, &version->desc_len,
478 dev->driver->desc);
479
480 return err;
481}
482
483/**
484 * drm_ioctl_permit - Check ioctl permissions against caller
485 *
486 * @flags: ioctl permission flags.
487 * @file_priv: Pointer to struct drm_file identifying the caller.
488 *
489 * Checks whether the caller is allowed to run an ioctl with the
490 * indicated permissions. If so, returns zero. Otherwise returns an
491 * error code suitable for ioctl return.
492 */
493static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
494{
495 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
496 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
497 return -EACCES;
498
499 /* AUTH is only for authenticated or render client */
500 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
501 !file_priv->authenticated))
502 return -EACCES;
503
504 /* MASTER is only for master or control clients */
Dave Airlie7963e9d2014-08-08 07:30:53 +1000505 if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
David Herrmannec8f1122014-07-23 14:14:53 +0200506 !drm_is_control_client(file_priv)))
507 return -EACCES;
508
509 /* Control clients must be explicitly allowed */
510 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
511 drm_is_control_client(file_priv)))
512 return -EACCES;
513
514 /* Render clients must be explicitly allowed */
515 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
516 drm_is_render_client(file_priv)))
517 return -EACCES;
518
519 return 0;
520}
521
Daniel Vetter78238752014-09-10 12:43:55 +0200522#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
523 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
524
525/** Ioctl table */
526static const struct drm_ioctl_desc drm_ioctls[] = {
527 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
528 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
529 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
530 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
531 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
532 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
533 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
534 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
535 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
536 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
537
538 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
539 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
540 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
541 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
542
543 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
544 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH),
545
546 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
547 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
548
549 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
550 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
551
552 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
553 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
554 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
555 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
556 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
557 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
558 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
559
560 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
561 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
562
563 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH),
564 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH),
565
566 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
567
568 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
569 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
570 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH),
571 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH),
572 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH),
573 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH),
574
575 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
576
577#if __OS_HAS_AGP
578 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
579 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
580 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
581 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
582 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
583 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
584 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
585 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
586#endif
587
588 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
589 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
590
591 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
592
593 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
594
595 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
596
597 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
598 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
599 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
600
601 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
602
603 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
604 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
605
606 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
607 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
614 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
615 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
616 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
617 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
618 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
619 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
620 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
621 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
622 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
623 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
624 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
625 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
626 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
627 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
628 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
629 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
630 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
631 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
632 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
Rob Clarkd34f20d2014-12-18 16:01:56 -0500633 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
Daniel Vetter78238752014-09-10 12:43:55 +0200634};
635
636#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
637
David Herrmannec8f1122014-07-23 14:14:53 +0200638/**
639 * Called whenever a process performs an ioctl on /dev/drm.
640 *
641 * \param inode device inode.
642 * \param file_priv DRM file private.
643 * \param cmd command.
644 * \param arg user argument.
645 * \return zero on success or negative number on failure.
646 *
647 * Looks up the ioctl function in the ::ioctls table, checking for root
648 * previleges if so required, and dispatches to the respective function.
649 */
650long drm_ioctl(struct file *filp,
651 unsigned int cmd, unsigned long arg)
652{
653 struct drm_file *file_priv = filp->private_data;
654 struct drm_device *dev;
655 const struct drm_ioctl_desc *ioctl = NULL;
656 drm_ioctl_t *func;
657 unsigned int nr = DRM_IOCTL_NR(cmd);
658 int retcode = -EINVAL;
659 char stack_kdata[128];
660 char *kdata = NULL;
661 unsigned int usize, asize;
662
663 dev = file_priv->minor->dev;
664
665 if (drm_device_is_unplugged(dev))
666 return -ENODEV;
667
668 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
669 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
670 goto err_i1;
671 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
672 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
673 u32 drv_size;
674 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
675 drv_size = _IOC_SIZE(ioctl->cmd_drv);
676 usize = asize = _IOC_SIZE(cmd);
677 if (drv_size > asize)
678 asize = drv_size;
679 cmd = ioctl->cmd_drv;
680 }
681 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
682 u32 drv_size;
683
684 ioctl = &drm_ioctls[nr];
685
686 drv_size = _IOC_SIZE(ioctl->cmd);
687 usize = asize = _IOC_SIZE(cmd);
688 if (drv_size > asize)
689 asize = drv_size;
690
691 cmd = ioctl->cmd;
692 } else
693 goto err_i1;
694
695 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
696 task_pid_nr(current),
697 (long)old_encode_dev(file_priv->minor->kdev->devt),
698 file_priv->authenticated, ioctl->name);
699
700 /* Do not trust userspace, use our own definition */
701 func = ioctl->func;
702
703 if (unlikely(!func)) {
704 DRM_DEBUG("no function\n");
705 retcode = -EINVAL;
706 goto err_i1;
707 }
708
709 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
710 if (unlikely(retcode))
711 goto err_i1;
712
713 if (cmd & (IOC_IN | IOC_OUT)) {
714 if (asize <= sizeof(stack_kdata)) {
715 kdata = stack_kdata;
716 } else {
717 kdata = kmalloc(asize, GFP_KERNEL);
718 if (!kdata) {
719 retcode = -ENOMEM;
720 goto err_i1;
721 }
722 }
723 if (asize > usize)
724 memset(kdata + usize, 0, asize - usize);
725 }
726
727 if (cmd & IOC_IN) {
728 if (copy_from_user(kdata, (void __user *)arg,
729 usize) != 0) {
730 retcode = -EFAULT;
731 goto err_i1;
732 }
733 } else if (cmd & IOC_OUT) {
734 memset(kdata, 0, usize);
735 }
736
737 if (ioctl->flags & DRM_UNLOCKED)
738 retcode = func(dev, kdata, file_priv);
739 else {
740 mutex_lock(&drm_global_mutex);
741 retcode = func(dev, kdata, file_priv);
742 mutex_unlock(&drm_global_mutex);
743 }
744
745 if (cmd & IOC_OUT) {
746 if (copy_to_user((void __user *)arg, kdata,
747 usize) != 0)
748 retcode = -EFAULT;
749 }
750
751 err_i1:
752 if (!ioctl)
753 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
754 task_pid_nr(current),
755 (long)old_encode_dev(file_priv->minor->kdev->devt),
756 file_priv->authenticated, cmd, nr);
757
758 if (kdata != stack_kdata)
759 kfree(kdata);
760 if (retcode)
761 DRM_DEBUG("ret = %d\n", retcode);
762 return retcode;
763}
764EXPORT_SYMBOL(drm_ioctl);
765
766/**
767 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
768 *
769 * @nr: Ioctl number.
770 * @flags: Where to return the ioctl permission flags
771 */
772bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
773{
774 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
775 (nr < DRM_COMMAND_BASE)) {
776 *flags = drm_ioctls[nr].flags;
777 return true;
778 }
779
780 return false;
781}
782EXPORT_SYMBOL(drm_ioctl_flags);