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1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_ioctl.c |
1da177e4 LT |
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 "drmP.h" | |
37 | #include "drm_core.h" | |
38 | ||
39 | #include "linux/pci.h" | |
b2c606fe | 40 | #include "linux/export.h" |
1da177e4 LT |
41 | |
42 | /** | |
43 | * Get the bus id. | |
b5e89ed5 | 44 | * |
1da177e4 | 45 | * \param inode device inode. |
6c340eac | 46 | * \param file_priv DRM file private. |
1da177e4 LT |
47 | * \param cmd command. |
48 | * \param arg user argument, pointing to a drm_unique structure. | |
49 | * \return zero on success or a negative number on failure. | |
50 | * | |
51 | * Copies the bus id from drm_device::unique into user space. | |
52 | */ | |
c153f45f EA |
53 | int drm_getunique(struct drm_device *dev, void *data, |
54 | struct drm_file *file_priv) | |
1da177e4 | 55 | { |
c153f45f | 56 | struct drm_unique *u = data; |
7c1c2871 | 57 | struct drm_master *master = file_priv->master; |
1da177e4 | 58 | |
7c1c2871 DA |
59 | if (u->unique_len >= master->unique_len) { |
60 | if (copy_to_user(u->unique, master->unique, master->unique_len)) | |
1da177e4 LT |
61 | return -EFAULT; |
62 | } | |
7c1c2871 | 63 | u->unique_len = master->unique_len; |
c153f45f | 64 | |
1da177e4 LT |
65 | return 0; |
66 | } | |
67 | ||
3fb688fd CW |
68 | static void |
69 | drm_unset_busid(struct drm_device *dev, | |
70 | struct drm_master *master) | |
71 | { | |
72 | kfree(dev->devname); | |
73 | dev->devname = NULL; | |
74 | ||
75 | kfree(master->unique); | |
76 | master->unique = NULL; | |
77 | master->unique_len = 0; | |
78 | master->unique_size = 0; | |
79 | } | |
80 | ||
1da177e4 LT |
81 | /** |
82 | * Set the bus id. | |
b5e89ed5 | 83 | * |
1da177e4 | 84 | * \param inode device inode. |
6c340eac | 85 | * \param file_priv DRM file private. |
1da177e4 LT |
86 | * \param cmd command. |
87 | * \param arg user argument, pointing to a drm_unique structure. | |
88 | * \return zero on success or a negative number on failure. | |
89 | * | |
90 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
91 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
92 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
93 | * version 1.1 or greater. | |
94 | */ | |
c153f45f EA |
95 | int drm_setunique(struct drm_device *dev, void *data, |
96 | struct drm_file *file_priv) | |
1da177e4 | 97 | { |
c153f45f | 98 | struct drm_unique *u = data; |
7c1c2871 | 99 | struct drm_master *master = file_priv->master; |
8410ea3b | 100 | int ret; |
1da177e4 | 101 | |
7c1c2871 | 102 | if (master->unique_len || master->unique) |
b5e89ed5 | 103 | return -EBUSY; |
1da177e4 | 104 | |
c153f45f | 105 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 106 | return -EINVAL; |
1da177e4 | 107 | |
8410ea3b DA |
108 | if (!dev->driver->bus->set_unique) |
109 | return -EINVAL; | |
b5e89ed5 | 110 | |
8410ea3b DA |
111 | ret = dev->driver->bus->set_unique(dev, master, u); |
112 | if (ret) | |
3fb688fd | 113 | goto err; |
1da177e4 LT |
114 | |
115 | return 0; | |
3fb688fd CW |
116 | |
117 | err: | |
118 | drm_unset_busid(dev, master); | |
119 | return ret; | |
1da177e4 LT |
120 | } |
121 | ||
7c1c2871 | 122 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 123 | { |
7c1c2871 | 124 | struct drm_master *master = file_priv->master; |
8410ea3b | 125 | int ret; |
3fb688fd CW |
126 | |
127 | if (master->unique != NULL) | |
128 | drm_unset_busid(dev, master); | |
fe34765b | 129 | |
8410ea3b DA |
130 | ret = dev->driver->bus->set_busid(dev, master); |
131 | if (ret) | |
132 | goto err; | |
1da177e4 | 133 | return 0; |
3fb688fd CW |
134 | err: |
135 | drm_unset_busid(dev, master); | |
136 | return ret; | |
1da177e4 LT |
137 | } |
138 | ||
1da177e4 LT |
139 | /** |
140 | * Get a mapping information. | |
141 | * | |
142 | * \param inode device inode. | |
6c340eac | 143 | * \param file_priv DRM file private. |
1da177e4 LT |
144 | * \param cmd command. |
145 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 146 | * |
1da177e4 LT |
147 | * \return zero on success or a negative number on failure. |
148 | * | |
149 | * Searches for the mapping with the specified offset and copies its information | |
150 | * into userspace | |
151 | */ | |
c153f45f EA |
152 | int drm_getmap(struct drm_device *dev, void *data, |
153 | struct drm_file *file_priv) | |
1da177e4 | 154 | { |
c153f45f | 155 | struct drm_map *map = data; |
55910517 | 156 | struct drm_map_list *r_list = NULL; |
1da177e4 | 157 | struct list_head *list; |
b5e89ed5 DA |
158 | int idx; |
159 | int i; | |
1da177e4 | 160 | |
c153f45f | 161 | idx = map->offset; |
09b4ea47 | 162 | if (idx < 0) |
1da177e4 | 163 | return -EINVAL; |
1da177e4 LT |
164 | |
165 | i = 0; | |
09b4ea47 | 166 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 167 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 168 | if (i == idx) { |
55910517 | 169 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
170 | break; |
171 | } | |
172 | i++; | |
173 | } | |
b5e89ed5 | 174 | if (!r_list || !r_list->map) { |
30e2fb18 | 175 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
176 | return -EINVAL; |
177 | } | |
178 | ||
c153f45f EA |
179 | map->offset = r_list->map->offset; |
180 | map->size = r_list->map->size; | |
181 | map->type = r_list->map->type; | |
182 | map->flags = r_list->map->flags; | |
183 | map->handle = (void *)(unsigned long) r_list->user_token; | |
184 | map->mtrr = r_list->map->mtrr; | |
30e2fb18 | 185 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 186 | |
1da177e4 LT |
187 | return 0; |
188 | } | |
189 | ||
190 | /** | |
191 | * Get client information. | |
192 | * | |
193 | * \param inode device inode. | |
6c340eac | 194 | * \param file_priv DRM file private. |
1da177e4 LT |
195 | * \param cmd command. |
196 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 197 | * |
1da177e4 LT |
198 | * \return zero on success or a negative number on failure. |
199 | * | |
200 | * Searches for the client with the specified index and copies its information | |
201 | * into userspace | |
202 | */ | |
c153f45f EA |
203 | int drm_getclient(struct drm_device *dev, void *data, |
204 | struct drm_file *file_priv) | |
1da177e4 | 205 | { |
c153f45f | 206 | struct drm_client *client = data; |
84b1fd10 | 207 | struct drm_file *pt; |
b5e89ed5 DA |
208 | int idx; |
209 | int i; | |
1da177e4 | 210 | |
c153f45f | 211 | idx = client->idx; |
bd1b331f | 212 | i = 0; |
09b4ea47 IH |
213 | |
214 | mutex_lock(&dev->struct_mutex); | |
bd1b331f | 215 | list_for_each_entry(pt, &dev->filelist, lhead) { |
b018fcda EA |
216 | if (i++ >= idx) { |
217 | client->auth = pt->authenticated; | |
218 | client->pid = pt->pid; | |
219 | client->uid = pt->uid; | |
220 | client->magic = pt->magic; | |
221 | client->iocs = pt->ioctl_count; | |
222 | mutex_unlock(&dev->struct_mutex); | |
223 | ||
224 | return 0; | |
225 | } | |
bd1b331f | 226 | } |
30e2fb18 | 227 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 228 | |
b018fcda | 229 | return -EINVAL; |
1da177e4 LT |
230 | } |
231 | ||
b5e89ed5 DA |
232 | /** |
233 | * Get statistics information. | |
234 | * | |
1da177e4 | 235 | * \param inode device inode. |
6c340eac | 236 | * \param file_priv DRM file private. |
1da177e4 LT |
237 | * \param cmd command. |
238 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 239 | * |
1da177e4 LT |
240 | * \return zero on success or a negative number on failure. |
241 | */ | |
c153f45f EA |
242 | int drm_getstats(struct drm_device *dev, void *data, |
243 | struct drm_file *file_priv) | |
1da177e4 | 244 | { |
c153f45f | 245 | struct drm_stats *stats = data; |
b5e89ed5 | 246 | int i; |
1da177e4 | 247 | |
246a3d18 | 248 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 249 | |
1da177e4 LT |
250 | for (i = 0; i < dev->counters; i++) { |
251 | if (dev->types[i] == _DRM_STAT_LOCK) | |
c153f45f | 252 | stats->data[i].value = |
7c1c2871 | 253 | (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0); |
b5e89ed5 | 254 | else |
c153f45f EA |
255 | stats->data[i].value = atomic_read(&dev->counts[i]); |
256 | stats->data[i].type = dev->types[i]; | |
1da177e4 | 257 | } |
b5e89ed5 | 258 | |
c153f45f | 259 | stats->count = dev->counters; |
1da177e4 | 260 | |
1da177e4 LT |
261 | return 0; |
262 | } | |
263 | ||
9f35421e BS |
264 | /** |
265 | * Get device/driver capabilities | |
266 | */ | |
267 | int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
268 | { | |
269 | struct drm_get_cap *req = data; | |
270 | ||
271 | req->value = 0; | |
e73f88af DA |
272 | switch (req->capability) { |
273 | case DRM_CAP_DUMB_BUFFER: | |
274 | if (dev->driver->dumb_create) | |
275 | req->value = 1; | |
276 | break; | |
51eab416 | 277 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
278 | req->value = 1; |
279 | break; | |
019d96cb DA |
280 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
281 | req->value = dev->mode_config.preferred_depth; | |
282 | break; | |
283 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
284 | req->value = dev->mode_config.prefer_shadow; | |
285 | break; | |
4271a409 DA |
286 | case DRM_CAP_PRIME: |
287 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
288 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
289 | break; | |
e73f88af DA |
290 | default: |
291 | return -EINVAL; | |
292 | } | |
9f35421e BS |
293 | return 0; |
294 | } | |
295 | ||
1da177e4 LT |
296 | /** |
297 | * Setversion ioctl. | |
298 | * | |
299 | * \param inode device inode. | |
6c340eac | 300 | * \param file_priv DRM file private. |
1da177e4 LT |
301 | * \param cmd command. |
302 | * \param arg user argument, pointing to a drm_lock structure. | |
303 | * \return zero on success or negative number on failure. | |
304 | * | |
305 | * Sets the requested interface version | |
306 | */ | |
c153f45f | 307 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 308 | { |
c153f45f EA |
309 | struct drm_set_version *sv = data; |
310 | int if_version, retcode = 0; | |
311 | ||
312 | if (sv->drm_di_major != -1) { | |
313 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
314 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
315 | retcode = -EINVAL; | |
316 | goto done; | |
317 | } | |
318 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
319 | sv->drm_di_minor); | |
3d77461e | 320 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 321 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
322 | /* |
323 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 324 | * Version 1.4 has proper PCI domain support |
1da177e4 | 325 | */ |
3fb688fd CW |
326 | retcode = drm_set_busid(dev, file_priv); |
327 | if (retcode) | |
328 | goto done; | |
1da177e4 LT |
329 | } |
330 | } | |
331 | ||
c153f45f EA |
332 | if (sv->drm_dd_major != -1) { |
333 | if (sv->drm_dd_major != dev->driver->major || | |
334 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
335 | dev->driver->minor) { | |
336 | retcode = -EINVAL; | |
337 | goto done; | |
338 | } | |
1da177e4 LT |
339 | |
340 | if (dev->driver->set_version) | |
c153f45f | 341 | dev->driver->set_version(dev, sv); |
1da177e4 | 342 | } |
c153f45f EA |
343 | |
344 | done: | |
345 | sv->drm_di_major = DRM_IF_MAJOR; | |
346 | sv->drm_di_minor = DRM_IF_MINOR; | |
347 | sv->drm_dd_major = dev->driver->major; | |
348 | sv->drm_dd_minor = dev->driver->minor; | |
349 | ||
350 | return retcode; | |
1da177e4 LT |
351 | } |
352 | ||
353 | /** No-op ioctl. */ | |
c153f45f EA |
354 | int drm_noop(struct drm_device *dev, void *data, |
355 | struct drm_file *file_priv) | |
1da177e4 LT |
356 | { |
357 | DRM_DEBUG("\n"); | |
358 | return 0; | |
359 | } | |
b2c606fe | 360 | EXPORT_SYMBOL(drm_noop); |