1 /**
2 * \file drm_ioctl.c
3 * 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 <sys/cdefs.h>
37 #include <dev/drm2/drmP.h>
38 #include <dev/drm2/drm_core.h>
39
40 /**
41 * Get the bus id.
42 *
43 * \param inode device inode.
44 * \param file_priv DRM file private.
45 * \param cmd command.
46 * \param arg user argument, pointing to a drm_unique structure.
47 * \return zero on success or a negative number on failure.
48 *
49 * Copies the bus id from drm_device::unique into user space.
50 */
drm_getunique(struct drm_device * dev,void * data,struct drm_file * file_priv)51 int drm_getunique(struct drm_device *dev, void *data,
52 struct drm_file *file_priv)
53 {
54 struct drm_unique *u = data;
55 struct drm_master *master = file_priv->master;
56
57 if (u->unique_len >= master->unique_len) {
58 if (copy_to_user(u->unique, master->unique, master->unique_len))
59 return -EFAULT;
60 }
61 u->unique_len = master->unique_len;
62
63 return 0;
64 }
65
66 static void
drm_unset_busid(struct drm_device * dev,struct drm_master * master)67 drm_unset_busid(struct drm_device *dev,
68 struct drm_master *master)
69 {
70
71 free(master->unique, DRM_MEM_DRIVER);
72 master->unique = NULL;
73 master->unique_len = 0;
74 master->unique_size = 0;
75 }
76
77 /**
78 * Set the bus id.
79 *
80 * \param inode device inode.
81 * \param file_priv DRM file private.
82 * \param cmd command.
83 * \param arg user argument, pointing to a drm_unique structure.
84 * \return zero on success or a negative number on failure.
85 *
86 * Copies the bus id from userspace into drm_device::unique, and verifies that
87 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
88 * in interface version 1.1 and will return EBUSY when setversion has requested
89 * version 1.1 or greater.
90 */
drm_setunique(struct drm_device * dev,void * data,struct drm_file * file_priv)91 int drm_setunique(struct drm_device *dev, void *data,
92 struct drm_file *file_priv)
93 {
94 struct drm_unique *u = data;
95 struct drm_master *master = file_priv->master;
96 int ret;
97
98 if (master->unique_len || master->unique)
99 return -EBUSY;
100
101 if (!u->unique_len || u->unique_len > 1024)
102 return -EINVAL;
103
104 if (!dev->driver->bus->set_unique)
105 return -EINVAL;
106
107 ret = dev->driver->bus->set_unique(dev, master, u);
108 if (ret)
109 goto err;
110
111 return 0;
112
113 err:
114 drm_unset_busid(dev, master);
115 return ret;
116 }
117
drm_set_busid(struct drm_device * dev,struct drm_file * file_priv)118 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
119 {
120 struct drm_master *master = file_priv->master;
121 int ret;
122
123 if (master->unique != NULL)
124 drm_unset_busid(dev, master);
125
126 ret = dev->driver->bus->set_busid(dev, master);
127 if (ret)
128 goto err;
129 return 0;
130 err:
131 drm_unset_busid(dev, master);
132 return ret;
133 }
134
135 /**
136 * Get a mapping information.
137 *
138 * \param inode device inode.
139 * \param file_priv DRM file private.
140 * \param cmd command.
141 * \param arg user argument, pointing to a drm_map structure.
142 *
143 * \return zero on success or a negative number on failure.
144 *
145 * Searches for the mapping with the specified offset and copies its information
146 * into userspace
147 */
drm_getmap(struct drm_device * dev,void * data,struct drm_file * file_priv)148 int drm_getmap(struct drm_device *dev, void *data,
149 struct drm_file *file_priv)
150 {
151 struct drm_map *map = data;
152 struct drm_map_list *r_list = NULL;
153 struct list_head *list;
154 int idx;
155 int i;
156
157 idx = map->offset;
158 if (idx < 0)
159 return -EINVAL;
160
161 i = 0;
162 DRM_LOCK(dev);
163 list_for_each(list, &dev->maplist) {
164 if (i == idx) {
165 r_list = list_entry(list, struct drm_map_list, head);
166 break;
167 }
168 i++;
169 }
170 if (!r_list || !r_list->map) {
171 DRM_UNLOCK(dev);
172 return -EINVAL;
173 }
174
175 map->offset = r_list->map->offset;
176 map->size = r_list->map->size;
177 map->type = r_list->map->type;
178 map->flags = r_list->map->flags;
179 map->handle = (void *)(unsigned long) r_list->user_token;
180 map->mtrr = r_list->map->mtrr;
181 DRM_UNLOCK(dev);
182
183 return 0;
184 }
185
186 /**
187 * Get client information.
188 *
189 * \param inode device inode.
190 * \param file_priv DRM file private.
191 * \param cmd command.
192 * \param arg user argument, pointing to a drm_client structure.
193 *
194 * \return zero on success or a negative number on failure.
195 *
196 * Searches for the client with the specified index and copies its information
197 * into userspace
198 */
drm_getclient(struct drm_device * dev,void * data,struct drm_file * file_priv)199 int drm_getclient(struct drm_device *dev, void *data,
200 struct drm_file *file_priv)
201 {
202 struct drm_client *client = data;
203 struct drm_file *pt;
204 int idx;
205 int i;
206
207 idx = client->idx;
208 i = 0;
209
210 DRM_LOCK(dev);
211 list_for_each_entry(pt, &dev->filelist, lhead) {
212 if (i++ >= idx) {
213 client->auth = pt->authenticated;
214 client->pid = pt->pid;
215 client->uid = pt->uid;
216 client->magic = pt->magic;
217 client->iocs = pt->ioctl_count;
218 DRM_UNLOCK(dev);
219
220 return 0;
221 }
222 }
223 DRM_UNLOCK(dev);
224
225 return -EINVAL;
226 }
227
228 /**
229 * Get statistics information.
230 *
231 * \param inode device inode.
232 * \param file_priv DRM file private.
233 * \param cmd command.
234 * \param arg user argument, pointing to a drm_stats structure.
235 *
236 * \return zero on success or a negative number on failure.
237 */
drm_getstats(struct drm_device * dev,void * data,struct drm_file * file_priv)238 int drm_getstats(struct drm_device *dev, void *data,
239 struct drm_file *file_priv)
240 {
241 struct drm_stats *stats = data;
242 int i;
243
244 memset(stats, 0, sizeof(*stats));
245
246 for (i = 0; i < dev->counters; i++) {
247 if (dev->types[i] == _DRM_STAT_LOCK)
248 stats->data[i].value =
249 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
250 else
251 stats->data[i].value = atomic_read(&dev->counts[i]);
252 stats->data[i].type = dev->types[i];
253 }
254
255 stats->count = dev->counters;
256
257 return 0;
258 }
259
260 /**
261 * Get device/driver capabilities
262 */
drm_getcap(struct drm_device * dev,void * data,struct drm_file * file_priv)263 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
264 {
265 struct drm_get_cap *req = data;
266
267 req->value = 0;
268 switch (req->capability) {
269 case DRM_CAP_DUMB_BUFFER:
270 if (dev->driver->dumb_create)
271 req->value = 1;
272 break;
273 case DRM_CAP_VBLANK_HIGH_CRTC:
274 req->value = 1;
275 break;
276 case DRM_CAP_DUMB_PREFERRED_DEPTH:
277 req->value = dev->mode_config.preferred_depth;
278 break;
279 case DRM_CAP_DUMB_PREFER_SHADOW:
280 req->value = dev->mode_config.prefer_shadow;
281 break;
282 case DRM_CAP_PRIME:
283 req->value |= false /* XXXKIB dev->driver->prime_fd_to_handle */ ? DRM_PRIME_CAP_IMPORT : 0;
284 req->value |= false /* XXXKIB dev->driver->prime_handle_to_fd */ ? DRM_PRIME_CAP_EXPORT : 0;
285 break;
286 case DRM_CAP_TIMESTAMP_MONOTONIC:
287 req->value = drm_timestamp_monotonic;
288 break;
289 default:
290 return -EINVAL;
291 }
292 return 0;
293 }
294
295 /**
296 * Setversion ioctl.
297 *
298 * \param inode device inode.
299 * \param file_priv DRM file private.
300 * \param cmd command.
301 * \param arg user argument, pointing to a drm_lock structure.
302 * \return zero on success or negative number on failure.
303 *
304 * Sets the requested interface version
305 */
drm_setversion(struct drm_device * dev,void * data,struct drm_file * file_priv)306 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
307 {
308 struct drm_set_version *sv = data;
309 int if_version, retcode = 0;
310
311 if (sv->drm_di_major != -1) {
312 if (sv->drm_di_major != DRM_IF_MAJOR ||
313 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
314 retcode = -EINVAL;
315 goto done;
316 }
317 if_version = DRM_IF_VERSION(sv->drm_di_major,
318 sv->drm_di_minor);
319 dev->if_version = max(if_version, dev->if_version);
320 if (sv->drm_di_minor >= 1) {
321 /*
322 * Version 1.1 includes tying of DRM to specific device
323 * Version 1.4 has proper PCI domain support
324 */
325 retcode = drm_set_busid(dev, file_priv);
326 if (retcode)
327 goto done;
328 }
329 }
330
331 if (sv->drm_dd_major != -1) {
332 if (sv->drm_dd_major != dev->driver->major ||
333 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
334 dev->driver->minor) {
335 retcode = -EINVAL;
336 goto done;
337 }
338
339 if (dev->driver->set_version)
340 dev->driver->set_version(dev, sv);
341 }
342
343 done:
344 sv->drm_di_major = DRM_IF_MAJOR;
345 sv->drm_di_minor = DRM_IF_MINOR;
346 sv->drm_dd_major = dev->driver->major;
347 sv->drm_dd_minor = dev->driver->minor;
348
349 return retcode;
350 }
351
352 /** No-op ioctl. */
drm_noop(struct drm_device * dev,void * data,struct drm_file * file_priv)353 int drm_noop(struct drm_device *dev, void *data,
354 struct drm_file *file_priv)
355 {
356 DRM_DEBUG("\n");
357 return 0;
358 }
359 EXPORT_SYMBOL(drm_noop);
360