blob: 07247e2855a23f7d9b530f6383a68f0c64663a0c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
Dave Airlieb5e89ed2005-09-25 14:28:13 +10002 * \file drm_ioctl.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * IOCTL processing for DRM
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 */
8
9/*
10 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
11 *
12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
15 *
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
22 *
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
25 * Software.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
34 */
35
David Howells760285e2012-10-02 18:01:07 +010036#include <drm/drmP.h>
37#include <drm/drm_core.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
David Howells760285e2012-10-02 18:01:07 +010039#include <linux/pci.h>
40#include <linux/export.h>
Andy Lutomirski0dd99f12013-05-13 23:58:48 +000041#ifdef CONFIG_X86
42#include <asm/mtrr.h>
43#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45/**
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 */
Eric Anholtc153f452007-09-03 12:06:45 +100056int drm_getunique(struct drm_device *dev, void *data,
57 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{
75 kfree(dev->devname);
76 dev->devname = NULL;
77
78 kfree(master->unique);
79 master->unique = NULL;
80 master->unique_len = 0;
81 master->unique_size = 0;
82}
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/**
85 * Set the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100086 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100088 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 * \param cmd command.
90 * \param arg user argument, pointing to a drm_unique structure.
91 * \return zero on success or a negative number on failure.
92 *
93 * Copies the bus id from userspace into drm_device::unique, and verifies that
94 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
95 * in interface version 1.1 and will return EBUSY when setversion has requested
96 * version 1.1 or greater.
97 */
Eric Anholtc153f452007-09-03 12:06:45 +100098int drm_setunique(struct drm_device *dev, void *data,
99 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
Eric Anholtc153f452007-09-03 12:06:45 +1000101 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +1000102 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000103 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Dave Airlie7c1c2872008-11-28 14:22:24 +1000105 if (master->unique_len || master->unique)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000106 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Eric Anholtc153f452007-09-03 12:06:45 +1000108 if (!u->unique_len || u->unique_len > 1024)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000109 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Dave Airlie8410ea32010-12-15 03:16:38 +1000111 if (!dev->driver->bus->set_unique)
112 return -EINVAL;
113
114 ret = dev->driver->bus->set_unique(dev, master, u);
115 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
Dave Airlie8410ea32010-12-15 03:16:38 +1000133 ret = dev->driver->bus->set_busid(dev, master);
134 if (ret)
135 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 return 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100137err:
138 drm_unset_busid(dev, master);
139 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140}
141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142/**
143 * Get a mapping information.
144 *
145 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000146 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 * \param cmd command.
148 * \param arg user argument, pointing to a drm_map structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000149 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 * \return zero on success or a negative number on failure.
151 *
152 * Searches for the mapping with the specified offset and copies its information
153 * into userspace
154 */
Eric Anholtc153f452007-09-03 12:06:45 +1000155int drm_getmap(struct drm_device *dev, void *data,
156 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{
Eric Anholtc153f452007-09-03 12:06:45 +1000158 struct drm_map *map = data;
Dave Airlie55910512007-07-11 16:53:40 +1000159 struct drm_map_list *r_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 struct list_head *list;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000161 int idx;
162 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Eric Anholtc153f452007-09-03 12:06:45 +1000164 idx = map->offset;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400165 if (idx < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 i = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400169 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000170 list_for_each(list, &dev->maplist) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000171 if (i == idx) {
Dave Airlie55910512007-07-11 16:53:40 +1000172 r_list = list_entry(list, struct drm_map_list, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 break;
174 }
175 i++;
176 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000177 if (!r_list || !r_list->map) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100178 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return -EINVAL;
180 }
181
Eric Anholtc153f452007-09-03 12:06:45 +1000182 map->offset = r_list->map->offset;
183 map->size = r_list->map->size;
184 map->type = r_list->map->type;
185 map->flags = r_list->map->flags;
186 map->handle = (void *)(unsigned long) r_list->user_token;
Andy Lutomirski0dd99f12013-05-13 23:58:48 +0000187
188#ifdef CONFIG_X86
189 /*
190 * There appears to be exactly one user of the mtrr index: dritest.
191 * It's easy enough to keep it working on non-PAT systems.
192 */
193 map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
194#else
195 map->mtrr = -1;
196#endif
197
Dave Airlie30e2fb12006-02-02 19:37:46 +1100198 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return 0;
201}
202
203/**
204 * Get client information.
205 *
206 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000207 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 * \param cmd command.
209 * \param arg user argument, pointing to a drm_client structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000210 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 * \return zero on success or a negative number on failure.
212 *
213 * Searches for the client with the specified index and copies its information
214 * into userspace
215 */
Eric Anholtc153f452007-09-03 12:06:45 +1000216int drm_getclient(struct drm_device *dev, void *data,
217 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
Eric Anholtc153f452007-09-03 12:06:45 +1000219 struct drm_client *client = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Daniel Vetter719524d2013-08-08 15:41:31 +0200221 /*
222 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
223 * not breaking completely. Userspace tools stop enumerating one they
224 * get -EINVAL, hence this is the return value we need to hand back for
225 * no clients tracked.
226 *
227 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
228 * attempt to figure out whether they're authenticated or not. Since
229 * that's the only thing they care about, give it to the directly
230 * instead of walking one giant list.
231 */
232 if (client->idx == 0) {
233 client->auth = file_priv->authenticated;
234 client->pid = pid_vnr(file_priv->pid);
235 client->uid = from_kuid_munged(current_user_ns(),
236 file_priv->uid);
237 client->magic = 0;
238 client->iocs = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400239
Daniel Vetter719524d2013-08-08 15:41:31 +0200240 return 0;
241 } else {
242 return -EINVAL;
Eric Anholtb018fcd2007-11-22 18:46:54 +1000243 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000246/**
247 * Get statistics information.
248 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000250 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 * \param cmd command.
252 * \param arg user argument, pointing to a drm_stats structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000253 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 * \return zero on success or a negative number on failure.
255 */
Eric Anholtc153f452007-09-03 12:06:45 +1000256int drm_getstats(struct drm_device *dev, void *data,
257 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
Eric Anholtc153f452007-09-03 12:06:45 +1000259 struct drm_stats *stats = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Daniel Vetterd79cdc82013-08-08 15:41:32 +0200261 /* Clear stats to prevent userspace from eating its stack garbage. */
Li Zefan246a3d12007-11-05 12:53:09 +1000262 memset(stats, 0, sizeof(*stats));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return 0;
265}
266
267/**
Ben Skeggs9f354212011-02-21 11:17:35 +1000268 * Get device/driver capabilities
269 */
270int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
271{
272 struct drm_get_cap *req = data;
273
274 req->value = 0;
Dave Airliee73f88a2011-03-04 14:50:28 +1000275 switch (req->capability) {
276 case DRM_CAP_DUMB_BUFFER:
277 if (dev->driver->dumb_create)
278 req->value = 1;
279 break;
Dave Airlie51eab412011-03-24 20:54:35 +1000280 case DRM_CAP_VBLANK_HIGH_CRTC:
Ilija Hadzic19b01b52011-03-18 16:58:04 -0500281 req->value = 1;
282 break;
Dave Airlie019d96c2011-09-29 16:20:42 +0100283 case DRM_CAP_DUMB_PREFERRED_DEPTH:
284 req->value = dev->mode_config.preferred_depth;
285 break;
286 case DRM_CAP_DUMB_PREFER_SHADOW:
287 req->value = dev->mode_config.prefer_shadow;
288 break;
Dave Airlie4271a402012-04-02 14:11:50 +0100289 case DRM_CAP_PRIME:
290 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
291 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
292 break;
Imre Deakc61eef72012-10-23 18:53:26 +0000293 case DRM_CAP_TIMESTAMP_MONOTONIC:
294 req->value = drm_timestamp_monotonic;
295 break;
Keith Packard62f21042013-07-22 18:50:00 -0700296 case DRM_CAP_ASYNC_PAGE_FLIP:
297 req->value = dev->mode_config.async_page_flip;
298 break;
Dave Airliee73f88a2011-03-04 14:50:28 +1000299 default:
300 return -EINVAL;
301 }
Ben Skeggs9f354212011-02-21 11:17:35 +1000302 return 0;
303}
304
305/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 * Setversion ioctl.
307 *
308 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000309 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 * \param cmd command.
311 * \param arg user argument, pointing to a drm_lock structure.
312 * \return zero on success or negative number on failure.
313 *
314 * Sets the requested interface version
315 */
Eric Anholtc153f452007-09-03 12:06:45 +1000316int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
Eric Anholtc153f452007-09-03 12:06:45 +1000318 struct drm_set_version *sv = data;
319 int if_version, retcode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Eric Anholtc153f452007-09-03 12:06:45 +1000321 if (sv->drm_di_major != -1) {
322 if (sv->drm_di_major != DRM_IF_MAJOR ||
323 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
324 retcode = -EINVAL;
325 goto done;
326 }
327 if_version = DRM_IF_VERSION(sv->drm_di_major,
328 sv->drm_di_minor);
Dave Airlie3d774612006-08-07 20:07:43 +1000329 dev->if_version = max(if_version, dev->if_version);
Eric Anholtc153f452007-09-03 12:06:45 +1000330 if (sv->drm_di_minor >= 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 /*
332 * Version 1.1 includes tying of DRM to specific device
Benjamin Herrenschmidtc17c2f82010-08-06 13:55:10 +1000333 * Version 1.4 has proper PCI domain support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 */
Chris Wilson3fb688f2010-08-04 11:09:42 +0100335 retcode = drm_set_busid(dev, file_priv);
336 if (retcode)
337 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
339 }
340
Eric Anholtc153f452007-09-03 12:06:45 +1000341 if (sv->drm_dd_major != -1) {
342 if (sv->drm_dd_major != dev->driver->major ||
343 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
344 dev->driver->minor) {
345 retcode = -EINVAL;
346 goto done;
347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 }
Eric Anholtc153f452007-09-03 12:06:45 +1000349
350done:
351 sv->drm_di_major = DRM_IF_MAJOR;
352 sv->drm_di_minor = DRM_IF_MINOR;
353 sv->drm_dd_major = dev->driver->major;
354 sv->drm_dd_minor = dev->driver->minor;
355
356 return retcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357}
358
359/** No-op ioctl. */
Eric Anholtc153f452007-09-03 12:06:45 +1000360int drm_noop(struct drm_device *dev, void *data,
361 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362{
363 DRM_DEBUG("\n");
364 return 0;
365}
Daniel Vetterb2c606f2012-01-17 12:50:12 +0100366EXPORT_SYMBOL(drm_noop);