blob: ffd7a7ba70d496212c149bfd2a11798f5e01665f [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;
Dave Airlie84b1fd12007-07-11 15:53:27 +1000220 struct drm_file *pt;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000221 int idx;
222 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Eric Anholtc153f452007-09-03 12:06:45 +1000224 idx = client->idx;
Dave Airliebd1b3312007-05-26 05:01:51 +1000225 i = 0;
Ilija Hadzic09b4ea42011-10-28 17:43:28 -0400226
227 mutex_lock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000228 list_for_each_entry(pt, &dev->filelist, lhead) {
Eric Anholtb018fcd2007-11-22 18:46:54 +1000229 if (i++ >= idx) {
230 client->auth = pt->authenticated;
Eric W. Biederman5fce5e02012-02-07 16:47:26 -0800231 client->pid = pid_vnr(pt->pid);
232 client->uid = from_kuid_munged(current_user_ns(), pt->uid);
Eric Anholtb018fcd2007-11-22 18:46:54 +1000233 client->magic = pt->magic;
234 client->iocs = pt->ioctl_count;
235 mutex_unlock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000236
Eric Anholtb018fcd2007-11-22 18:46:54 +1000237 return 0;
238 }
239 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100240 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Eric Anholtb018fcd2007-11-22 18:46:54 +1000242 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000245/**
246 * Get statistics information.
247 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000249 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 * \param cmd command.
251 * \param arg user argument, pointing to a drm_stats structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000252 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 * \return zero on success or a negative number on failure.
254 */
Eric Anholtc153f452007-09-03 12:06:45 +1000255int drm_getstats(struct drm_device *dev, void *data,
256 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257{
Eric Anholtc153f452007-09-03 12:06:45 +1000258 struct drm_stats *stats = data;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000259 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Li Zefan246a3d12007-11-05 12:53:09 +1000261 memset(stats, 0, sizeof(*stats));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 for (i = 0; i < dev->counters; i++) {
264 if (dev->types[i] == _DRM_STAT_LOCK)
Eric Anholtc153f452007-09-03 12:06:45 +1000265 stats->data[i].value =
Dave Airlie7c1c2872008-11-28 14:22:24 +1000266 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000267 else
Eric Anholtc153f452007-09-03 12:06:45 +1000268 stats->data[i].value = atomic_read(&dev->counts[i]);
269 stats->data[i].type = dev->types[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000271
Eric Anholtc153f452007-09-03 12:06:45 +1000272 stats->count = dev->counters;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return 0;
275}
276
277/**
Ben Skeggs9f354212011-02-21 11:17:35 +1000278 * Get device/driver capabilities
279 */
280int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
281{
282 struct drm_get_cap *req = data;
283
284 req->value = 0;
Dave Airliee73f88a2011-03-04 14:50:28 +1000285 switch (req->capability) {
286 case DRM_CAP_DUMB_BUFFER:
287 if (dev->driver->dumb_create)
288 req->value = 1;
289 break;
Dave Airlie51eab412011-03-24 20:54:35 +1000290 case DRM_CAP_VBLANK_HIGH_CRTC:
Ilija Hadzic19b01b52011-03-18 16:58:04 -0500291 req->value = 1;
292 break;
Dave Airlie019d96c2011-09-29 16:20:42 +0100293 case DRM_CAP_DUMB_PREFERRED_DEPTH:
294 req->value = dev->mode_config.preferred_depth;
295 break;
296 case DRM_CAP_DUMB_PREFER_SHADOW:
297 req->value = dev->mode_config.prefer_shadow;
298 break;
Dave Airlie4271a402012-04-02 14:11:50 +0100299 case DRM_CAP_PRIME:
300 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
301 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
302 break;
Imre Deakc61eef72012-10-23 18:53:26 +0000303 case DRM_CAP_TIMESTAMP_MONOTONIC:
304 req->value = drm_timestamp_monotonic;
305 break;
Dave Airliee73f88a2011-03-04 14:50:28 +1000306 default:
307 return -EINVAL;
308 }
Ben Skeggs9f354212011-02-21 11:17:35 +1000309 return 0;
310}
311
312/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 * Setversion ioctl.
314 *
315 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000316 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 * \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 */
Eric Anholtc153f452007-09-03 12:06:45 +1000323int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
Eric Anholtc153f452007-09-03 12:06:45 +1000325 struct drm_set_version *sv = data;
326 int if_version, retcode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Eric Anholtc153f452007-09-03 12:06:45 +1000328 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);
Dave Airlie3d774612006-08-07 20:07:43 +1000336 dev->if_version = max(if_version, dev->if_version);
Eric Anholtc153f452007-09-03 12:06:45 +1000337 if (sv->drm_di_minor >= 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 /*
339 * Version 1.1 includes tying of DRM to specific device
Benjamin Herrenschmidtc17c2f82010-08-06 13:55:10 +1000340 * Version 1.4 has proper PCI domain support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 */
Chris Wilson3fb688f2010-08-04 11:09:42 +0100342 retcode = drm_set_busid(dev, file_priv);
343 if (retcode)
344 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 }
346 }
347
Eric Anholtc153f452007-09-03 12:06:45 +1000348 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 if (dev->driver->set_version)
Eric Anholtc153f452007-09-03 12:06:45 +1000357 dev->driver->set_version(dev, sv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 }
Eric Anholtc153f452007-09-03 12:06:45 +1000359
360done:
361 sv->drm_di_major = DRM_IF_MAJOR;
362 sv->drm_di_minor = DRM_IF_MINOR;
363 sv->drm_dd_major = dev->driver->major;
364 sv->drm_dd_minor = dev->driver->minor;
365
366 return retcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367}
368
369/** No-op ioctl. */
Eric Anholtc153f452007-09-03 12:06:45 +1000370int drm_noop(struct drm_device *dev, void *data,
371 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
373 DRM_DEBUG("\n");
374 return 0;
375}
Daniel Vetterb2c606f2012-01-17 12:50:12 +0100376EXPORT_SYMBOL(drm_noop);