blob: 117490590f56731fd44cd418c676dc21e7d3630b [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
36#include "drmP.h"
37#include "drm_core.h"
38
39#include "linux/pci.h"
40
41/**
42 * Get the bus id.
Dave Airlieb5e89ed2005-09-25 14:28:13 +100043 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +100045 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * \param cmd command.
47 * \param arg user argument, pointing to a drm_unique structure.
48 * \return zero on success or a negative number on failure.
49 *
50 * Copies the bus id from drm_device::unique into user space.
51 */
Eric Anholtc153f452007-09-03 12:06:45 +100052int drm_getunique(struct drm_device *dev, void *data,
53 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
Eric Anholtc153f452007-09-03 12:06:45 +100055 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +100056 struct drm_master *master = file_priv->master;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Dave Airlie7c1c2872008-11-28 14:22:24 +100058 if (u->unique_len >= master->unique_len) {
59 if (copy_to_user(u->unique, master->unique, master->unique_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 return -EFAULT;
61 }
Dave Airlie7c1c2872008-11-28 14:22:24 +100062 u->unique_len = master->unique_len;
Eric Anholtc153f452007-09-03 12:06:45 +100063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 return 0;
65}
66
Chris Wilson3fb688f2010-08-04 11:09:42 +010067static void
68drm_unset_busid(struct drm_device *dev,
69 struct drm_master *master)
70{
71 kfree(dev->devname);
72 dev->devname = NULL;
73
74 kfree(master->unique);
75 master->unique = NULL;
76 master->unique_len = 0;
77 master->unique_size = 0;
78}
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
92 * version 1.1 or greater.
93 */
Eric Anholtc153f452007-09-03 12:06:45 +100094int drm_setunique(struct drm_device *dev, void *data,
95 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Eric Anholtc153f452007-09-03 12:06:45 +100097 struct drm_unique *u = data;
Dave Airlie7c1c2872008-11-28 14:22:24 +100098 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +100099 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Dave Airlie7c1c2872008-11-28 14:22:24 +1000101 if (master->unique_len || master->unique)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000102 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Eric Anholtc153f452007-09-03 12:06:45 +1000104 if (!u->unique_len || u->unique_len > 1024)
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000105 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Dave Airlie8410ea32010-12-15 03:16:38 +1000107 if (!dev->driver->bus->set_unique)
108 return -EINVAL;
109
110 ret = dev->driver->bus->set_unique(dev, master, u);
111 if (ret)
Chris Wilson3fb688f2010-08-04 11:09:42 +0100112 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114 return 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100115
116err:
117 drm_unset_busid(dev, master);
118 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
120
Dave Airlie7c1c2872008-11-28 14:22:24 +1000121static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Dave Airlie7c1c2872008-11-28 14:22:24 +1000123 struct drm_master *master = file_priv->master;
Dave Airlie8410ea32010-12-15 03:16:38 +1000124 int ret;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100125
126 if (master->unique != NULL)
127 drm_unset_busid(dev, master);
Dave Airliefe347652006-01-02 21:19:39 +1100128
Dave Airlie8410ea32010-12-15 03:16:38 +1000129 ret = dev->driver->bus->set_busid(dev, master);
130 if (ret)
131 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 return 0;
Chris Wilson3fb688f2010-08-04 11:09:42 +0100133err:
134 drm_unset_busid(dev, master);
135 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138/**
139 * Get a mapping information.
140 *
141 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000142 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 * \param cmd command.
144 * \param arg user argument, pointing to a drm_map structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000145 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 * \return zero on success or a negative number on failure.
147 *
148 * Searches for the mapping with the specified offset and copies its information
149 * into userspace
150 */
Eric Anholtc153f452007-09-03 12:06:45 +1000151int drm_getmap(struct drm_device *dev, void *data,
152 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
Eric Anholtc153f452007-09-03 12:06:45 +1000154 struct drm_map *map = data;
Dave Airlie55910512007-07-11 16:53:40 +1000155 struct drm_map_list *r_list = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 struct list_head *list;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000157 int idx;
158 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
Eric Anholtc153f452007-09-03 12:06:45 +1000160 idx = map->offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Dave Airlie30e2fb12006-02-02 19:37:46 +1100162 mutex_lock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (idx < 0) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100164 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 return -EINVAL;
166 }
167
168 i = 0;
Dave Airliebd1b3312007-05-26 05:01:51 +1000169 list_for_each(list, &dev->maplist) {
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000170 if (i == idx) {
Dave Airlie55910512007-07-11 16:53:40 +1000171 r_list = list_entry(list, struct drm_map_list, head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 break;
173 }
174 i++;
175 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000176 if (!r_list || !r_list->map) {
Dave Airlie30e2fb12006-02-02 19:37:46 +1100177 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -EINVAL;
179 }
180
Eric Anholtc153f452007-09-03 12:06:45 +1000181 map->offset = r_list->map->offset;
182 map->size = r_list->map->size;
183 map->type = r_list->map->type;
184 map->flags = r_list->map->flags;
185 map->handle = (void *)(unsigned long) r_list->user_token;
186 map->mtrr = r_list->map->mtrr;
Dave Airlie30e2fb12006-02-02 19:37:46 +1100187 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 return 0;
190}
191
192/**
193 * Get client information.
194 *
195 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000196 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 * \param cmd command.
198 * \param arg user argument, pointing to a drm_client structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000199 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 * \return zero on success or a negative number on failure.
201 *
202 * Searches for the client with the specified index and copies its information
203 * into userspace
204 */
Eric Anholtc153f452007-09-03 12:06:45 +1000205int drm_getclient(struct drm_device *dev, void *data,
206 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
Eric Anholtc153f452007-09-03 12:06:45 +1000208 struct drm_client *client = data;
Dave Airlie84b1fd12007-07-11 15:53:27 +1000209 struct drm_file *pt;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000210 int idx;
211 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Eric Anholtc153f452007-09-03 12:06:45 +1000213 idx = client->idx;
Dave Airlie30e2fb12006-02-02 19:37:46 +1100214 mutex_lock(&dev->struct_mutex);
Dave Airliebc5f4522007-11-05 12:50:58 +1000215
Dave Airliebd1b3312007-05-26 05:01:51 +1000216 i = 0;
217 list_for_each_entry(pt, &dev->filelist, lhead) {
Eric Anholtb018fcd2007-11-22 18:46:54 +1000218 if (i++ >= idx) {
219 client->auth = pt->authenticated;
220 client->pid = pt->pid;
221 client->uid = pt->uid;
222 client->magic = pt->magic;
223 client->iocs = pt->ioctl_count;
224 mutex_unlock(&dev->struct_mutex);
Dave Airliebd1b3312007-05-26 05:01:51 +1000225
Eric Anholtb018fcd2007-11-22 18:46:54 +1000226 return 0;
227 }
228 }
Dave Airlie30e2fb12006-02-02 19:37:46 +1100229 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Eric Anholtb018fcd2007-11-22 18:46:54 +1000231 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
233
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000234/**
235 * Get statistics information.
236 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000238 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 * \param cmd command.
240 * \param arg user argument, pointing to a drm_stats structure.
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000241 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 * \return zero on success or a negative number on failure.
243 */
Eric Anholtc153f452007-09-03 12:06:45 +1000244int drm_getstats(struct drm_device *dev, void *data,
245 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{
Eric Anholtc153f452007-09-03 12:06:45 +1000247 struct drm_stats *stats = data;
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000248 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Li Zefan246a3d12007-11-05 12:53:09 +1000250 memset(stats, 0, sizeof(*stats));
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000251
Dave Airlie30e2fb12006-02-02 19:37:46 +1100252 mutex_lock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 for (i = 0; i < dev->counters; i++) {
255 if (dev->types[i] == _DRM_STAT_LOCK)
Eric Anholtc153f452007-09-03 12:06:45 +1000256 stats->data[i].value =
Dave Airlie7c1c2872008-11-28 14:22:24 +1000257 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000258 else
Eric Anholtc153f452007-09-03 12:06:45 +1000259 stats->data[i].value = atomic_read(&dev->counts[i]);
260 stats->data[i].type = dev->types[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 }
Dave Airlieb5e89ed2005-09-25 14:28:13 +1000262
Eric Anholtc153f452007-09-03 12:06:45 +1000263 stats->count = dev->counters;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Dave Airlie30e2fb12006-02-02 19:37:46 +1100265 mutex_unlock(&dev->struct_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 return 0;
268}
269
270/**
271 * Setversion ioctl.
272 *
273 * \param inode device inode.
Eric Anholt6c340ea2007-08-25 20:23:09 +1000274 * \param file_priv DRM file private.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 * \param cmd command.
276 * \param arg user argument, pointing to a drm_lock structure.
277 * \return zero on success or negative number on failure.
278 *
279 * Sets the requested interface version
280 */
Eric Anholtc153f452007-09-03 12:06:45 +1000281int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Eric Anholtc153f452007-09-03 12:06:45 +1000283 struct drm_set_version *sv = data;
284 int if_version, retcode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Eric Anholtc153f452007-09-03 12:06:45 +1000286 if (sv->drm_di_major != -1) {
287 if (sv->drm_di_major != DRM_IF_MAJOR ||
288 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
289 retcode = -EINVAL;
290 goto done;
291 }
292 if_version = DRM_IF_VERSION(sv->drm_di_major,
293 sv->drm_di_minor);
Dave Airlie3d774612006-08-07 20:07:43 +1000294 dev->if_version = max(if_version, dev->if_version);
Eric Anholtc153f452007-09-03 12:06:45 +1000295 if (sv->drm_di_minor >= 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 /*
297 * Version 1.1 includes tying of DRM to specific device
Benjamin Herrenschmidtc17c2f82010-08-06 13:55:10 +1000298 * Version 1.4 has proper PCI domain support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 */
Chris Wilson3fb688f2010-08-04 11:09:42 +0100300 retcode = drm_set_busid(dev, file_priv);
301 if (retcode)
302 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
304 }
305
Eric Anholtc153f452007-09-03 12:06:45 +1000306 if (sv->drm_dd_major != -1) {
307 if (sv->drm_dd_major != dev->driver->major ||
308 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
309 dev->driver->minor) {
310 retcode = -EINVAL;
311 goto done;
312 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314 if (dev->driver->set_version)
Eric Anholtc153f452007-09-03 12:06:45 +1000315 dev->driver->set_version(dev, sv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 }
Eric Anholtc153f452007-09-03 12:06:45 +1000317
318done:
319 sv->drm_di_major = DRM_IF_MAJOR;
320 sv->drm_di_minor = DRM_IF_MINOR;
321 sv->drm_dd_major = dev->driver->major;
322 sv->drm_dd_minor = dev->driver->minor;
323
324 return retcode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325}
326
327/** No-op ioctl. */
Eric Anholtc153f452007-09-03 12:06:45 +1000328int drm_noop(struct drm_device *dev, void *data,
329 struct drm_file *file_priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 DRM_DEBUG("\n");
332 return 0;
333}