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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 | ||
760285e7 DH |
36 | #include <drm/drmP.h> |
37 | #include <drm/drm_core.h> | |
1da177e4 | 38 | |
760285e7 DH |
39 | #include <linux/pci.h> |
40 | #include <linux/export.h> | |
0dd99f1b AL |
41 | #ifdef CONFIG_X86 |
42 | #include <asm/mtrr.h> | |
43 | #endif | |
1da177e4 LT |
44 | |
45 | /** | |
46 | * Get the bus id. | |
b5e89ed5 | 47 | * |
1da177e4 | 48 | * \param inode device inode. |
6c340eac | 49 | * \param file_priv DRM file private. |
1da177e4 LT |
50 | * \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 | */ | |
c153f45f EA |
56 | int drm_getunique(struct drm_device *dev, void *data, |
57 | struct drm_file *file_priv) | |
1da177e4 | 58 | { |
c153f45f | 59 | struct drm_unique *u = data; |
7c1c2871 | 60 | struct drm_master *master = file_priv->master; |
1da177e4 | 61 | |
7c1c2871 DA |
62 | if (u->unique_len >= master->unique_len) { |
63 | if (copy_to_user(u->unique, master->unique, master->unique_len)) | |
1da177e4 LT |
64 | return -EFAULT; |
65 | } | |
7c1c2871 | 66 | u->unique_len = master->unique_len; |
c153f45f | 67 | |
1da177e4 LT |
68 | return 0; |
69 | } | |
70 | ||
3fb688fd CW |
71 | static void |
72 | drm_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 | ||
1da177e4 LT |
84 | /** |
85 | * Set the bus id. | |
b5e89ed5 | 86 | * |
1da177e4 | 87 | * \param inode device inode. |
6c340eac | 88 | * \param file_priv DRM file private. |
1da177e4 LT |
89 | * \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 | */ | |
c153f45f EA |
98 | int drm_setunique(struct drm_device *dev, void *data, |
99 | struct drm_file *file_priv) | |
1da177e4 | 100 | { |
c153f45f | 101 | struct drm_unique *u = data; |
7c1c2871 | 102 | struct drm_master *master = file_priv->master; |
8410ea3b | 103 | int ret; |
1da177e4 | 104 | |
7c1c2871 | 105 | if (master->unique_len || master->unique) |
b5e89ed5 | 106 | return -EBUSY; |
1da177e4 | 107 | |
c153f45f | 108 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 109 | return -EINVAL; |
1da177e4 | 110 | |
8410ea3b DA |
111 | if (!dev->driver->bus->set_unique) |
112 | return -EINVAL; | |
b5e89ed5 | 113 | |
8410ea3b DA |
114 | ret = dev->driver->bus->set_unique(dev, master, u); |
115 | if (ret) | |
3fb688fd | 116 | goto err; |
1da177e4 LT |
117 | |
118 | return 0; | |
3fb688fd CW |
119 | |
120 | err: | |
121 | drm_unset_busid(dev, master); | |
122 | return ret; | |
1da177e4 LT |
123 | } |
124 | ||
7c1c2871 | 125 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 126 | { |
7c1c2871 | 127 | struct drm_master *master = file_priv->master; |
8410ea3b | 128 | int ret; |
3fb688fd CW |
129 | |
130 | if (master->unique != NULL) | |
131 | drm_unset_busid(dev, master); | |
fe34765b | 132 | |
8410ea3b DA |
133 | ret = dev->driver->bus->set_busid(dev, master); |
134 | if (ret) | |
135 | goto err; | |
1da177e4 | 136 | return 0; |
3fb688fd CW |
137 | err: |
138 | drm_unset_busid(dev, master); | |
139 | return ret; | |
1da177e4 LT |
140 | } |
141 | ||
1da177e4 LT |
142 | /** |
143 | * Get a mapping information. | |
144 | * | |
145 | * \param inode device inode. | |
6c340eac | 146 | * \param file_priv DRM file private. |
1da177e4 LT |
147 | * \param cmd command. |
148 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 149 | * |
1da177e4 LT |
150 | * \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 | */ | |
c153f45f EA |
155 | int drm_getmap(struct drm_device *dev, void *data, |
156 | struct drm_file *file_priv) | |
1da177e4 | 157 | { |
c153f45f | 158 | struct drm_map *map = data; |
55910517 | 159 | struct drm_map_list *r_list = NULL; |
1da177e4 | 160 | struct list_head *list; |
b5e89ed5 DA |
161 | int idx; |
162 | int i; | |
1da177e4 | 163 | |
c153f45f | 164 | idx = map->offset; |
09b4ea47 | 165 | if (idx < 0) |
1da177e4 | 166 | return -EINVAL; |
1da177e4 LT |
167 | |
168 | i = 0; | |
09b4ea47 | 169 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 170 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 171 | if (i == idx) { |
55910517 | 172 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
173 | break; |
174 | } | |
175 | i++; | |
176 | } | |
b5e89ed5 | 177 | if (!r_list || !r_list->map) { |
30e2fb18 | 178 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
179 | return -EINVAL; |
180 | } | |
181 | ||
c153f45f EA |
182 | 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; | |
0dd99f1b AL |
187 | |
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 | ||
30e2fb18 | 198 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 199 | |
1da177e4 LT |
200 | return 0; |
201 | } | |
202 | ||
203 | /** | |
204 | * Get client information. | |
205 | * | |
206 | * \param inode device inode. | |
6c340eac | 207 | * \param file_priv DRM file private. |
1da177e4 LT |
208 | * \param cmd command. |
209 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 210 | * |
1da177e4 LT |
211 | * \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 | */ | |
c153f45f EA |
216 | int drm_getclient(struct drm_device *dev, void *data, |
217 | struct drm_file *file_priv) | |
1da177e4 | 218 | { |
c153f45f | 219 | struct drm_client *client = data; |
09b4ea47 | 220 | |
719524df DV |
221 | /* |
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; | |
239 | ||
240 | return 0; | |
241 | } else { | |
242 | return -EINVAL; | |
bd1b331f | 243 | } |
1da177e4 LT |
244 | } |
245 | ||
b5e89ed5 DA |
246 | /** |
247 | * Get statistics information. | |
248 | * | |
1da177e4 | 249 | * \param inode device inode. |
6c340eac | 250 | * \param file_priv DRM file private. |
1da177e4 LT |
251 | * \param cmd command. |
252 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 253 | * |
1da177e4 LT |
254 | * \return zero on success or a negative number on failure. |
255 | */ | |
c153f45f EA |
256 | int drm_getstats(struct drm_device *dev, void *data, |
257 | struct drm_file *file_priv) | |
1da177e4 | 258 | { |
c153f45f | 259 | struct drm_stats *stats = data; |
1da177e4 | 260 | |
d79cdc83 | 261 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 262 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 263 | |
1da177e4 LT |
264 | return 0; |
265 | } | |
266 | ||
9f35421e BS |
267 | /** |
268 | * Get device/driver capabilities | |
269 | */ | |
270 | int 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; | |
e73f88af DA |
275 | switch (req->capability) { |
276 | case DRM_CAP_DUMB_BUFFER: | |
277 | if (dev->driver->dumb_create) | |
278 | req->value = 1; | |
279 | break; | |
51eab416 | 280 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
281 | req->value = 1; |
282 | break; | |
019d96cb DA |
283 | 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; | |
4271a409 DA |
289 | 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; | |
c61eef72 ID |
293 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
294 | req->value = drm_timestamp_monotonic; | |
295 | break; | |
62f2104f KP |
296 | case DRM_CAP_ASYNC_PAGE_FLIP: |
297 | req->value = dev->mode_config.async_page_flip; | |
298 | break; | |
e73f88af DA |
299 | default: |
300 | return -EINVAL; | |
301 | } | |
9f35421e BS |
302 | return 0; |
303 | } | |
304 | ||
1da177e4 LT |
305 | /** |
306 | * Setversion ioctl. | |
307 | * | |
308 | * \param inode device inode. | |
6c340eac | 309 | * \param file_priv DRM file private. |
1da177e4 LT |
310 | * \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 | */ | |
c153f45f | 316 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 317 | { |
c153f45f EA |
318 | struct drm_set_version *sv = data; |
319 | int if_version, retcode = 0; | |
320 | ||
321 | 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); | |
3d77461e | 329 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 330 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
331 | /* |
332 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 333 | * Version 1.4 has proper PCI domain support |
1da177e4 | 334 | */ |
3fb688fd CW |
335 | retcode = drm_set_busid(dev, file_priv); |
336 | if (retcode) | |
337 | goto done; | |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
c153f45f EA |
341 | 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 | } | |
1da177e4 | 348 | } |
c153f45f EA |
349 | |
350 | done: | |
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; | |
1da177e4 LT |
357 | } |
358 | ||
359 | /** No-op ioctl. */ | |
c153f45f EA |
360 | int drm_noop(struct drm_device *dev, void *data, |
361 | struct drm_file *file_priv) | |
1da177e4 LT |
362 | { |
363 | DRM_DEBUG("\n"); | |
364 | return 0; | |
365 | } | |
b2c606fe | 366 | EXPORT_SYMBOL(drm_noop); |