Commit | Line | Data |
---|---|---|
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 | { | |
3fb688fd CW |
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 | |
53bf2a2b DV |
93 | * version 1.1 or greater. Also note that KMS is all version 1.1 and later and |
94 | * UMS was only ever supported on pci devices. | |
1da177e4 | 95 | */ |
c153f45f EA |
96 | int drm_setunique(struct drm_device *dev, void *data, |
97 | struct drm_file *file_priv) | |
1da177e4 | 98 | { |
c153f45f | 99 | struct drm_unique *u = data; |
7c1c2871 | 100 | struct drm_master *master = file_priv->master; |
8410ea3b | 101 | int ret; |
1da177e4 | 102 | |
7c1c2871 | 103 | if (master->unique_len || master->unique) |
b5e89ed5 | 104 | return -EBUSY; |
1da177e4 | 105 | |
c153f45f | 106 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 107 | return -EINVAL; |
1da177e4 | 108 | |
53bf2a2b DV |
109 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
110 | return 0; | |
111 | ||
112 | if (WARN_ON(!dev->pdev)) | |
8410ea3b | 113 | return -EINVAL; |
b5e89ed5 | 114 | |
53bf2a2b | 115 | ret = drm_pci_set_unique(dev, master, u); |
8410ea3b | 116 | if (ret) |
3fb688fd | 117 | goto err; |
1da177e4 LT |
118 | |
119 | return 0; | |
3fb688fd CW |
120 | |
121 | err: | |
122 | drm_unset_busid(dev, master); | |
123 | return ret; | |
1da177e4 LT |
124 | } |
125 | ||
7c1c2871 | 126 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 127 | { |
7c1c2871 | 128 | struct drm_master *master = file_priv->master; |
8410ea3b | 129 | int ret; |
3fb688fd CW |
130 | |
131 | if (master->unique != NULL) | |
132 | drm_unset_busid(dev, master); | |
fe34765b | 133 | |
ca8e2ad7 TR |
134 | if (dev->driver->bus && dev->driver->bus->set_busid) { |
135 | ret = dev->driver->bus->set_busid(dev, master); | |
136 | if (ret) { | |
137 | drm_unset_busid(dev, master); | |
138 | return ret; | |
139 | } | |
140 | } else { | |
141 | if (WARN(dev->unique == NULL, | |
142 | "No drm_bus.set_busid() implementation provided by " | |
143 | "%ps. Use drm_dev_set_unique() to set the unique " | |
144 | "name explicitly.", dev->driver)) | |
145 | return -EINVAL; | |
146 | ||
147 | master->unique = kstrdup(dev->unique, GFP_KERNEL); | |
148 | if (master->unique) | |
149 | master->unique_len = strlen(dev->unique); | |
150 | } | |
151 | ||
1da177e4 LT |
152 | return 0; |
153 | } | |
154 | ||
1da177e4 LT |
155 | /** |
156 | * Get a mapping information. | |
157 | * | |
158 | * \param inode device inode. | |
6c340eac | 159 | * \param file_priv DRM file private. |
1da177e4 LT |
160 | * \param cmd command. |
161 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 162 | * |
1da177e4 LT |
163 | * \return zero on success or a negative number on failure. |
164 | * | |
165 | * Searches for the mapping with the specified offset and copies its information | |
166 | * into userspace | |
167 | */ | |
c153f45f EA |
168 | int drm_getmap(struct drm_device *dev, void *data, |
169 | struct drm_file *file_priv) | |
1da177e4 | 170 | { |
c153f45f | 171 | struct drm_map *map = data; |
55910517 | 172 | struct drm_map_list *r_list = NULL; |
1da177e4 | 173 | struct list_head *list; |
b5e89ed5 DA |
174 | int idx; |
175 | int i; | |
1da177e4 | 176 | |
c153f45f | 177 | idx = map->offset; |
09b4ea47 | 178 | if (idx < 0) |
1da177e4 | 179 | return -EINVAL; |
1da177e4 LT |
180 | |
181 | i = 0; | |
09b4ea47 | 182 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 183 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 184 | if (i == idx) { |
55910517 | 185 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
186 | break; |
187 | } | |
188 | i++; | |
189 | } | |
b5e89ed5 | 190 | if (!r_list || !r_list->map) { |
30e2fb18 | 191 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
192 | return -EINVAL; |
193 | } | |
194 | ||
c153f45f EA |
195 | map->offset = r_list->map->offset; |
196 | map->size = r_list->map->size; | |
197 | map->type = r_list->map->type; | |
198 | map->flags = r_list->map->flags; | |
199 | map->handle = (void *)(unsigned long) r_list->user_token; | |
0dd99f1b AL |
200 | |
201 | #ifdef CONFIG_X86 | |
202 | /* | |
203 | * There appears to be exactly one user of the mtrr index: dritest. | |
204 | * It's easy enough to keep it working on non-PAT systems. | |
205 | */ | |
206 | map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); | |
207 | #else | |
208 | map->mtrr = -1; | |
209 | #endif | |
210 | ||
30e2fb18 | 211 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 212 | |
1da177e4 LT |
213 | return 0; |
214 | } | |
215 | ||
216 | /** | |
217 | * Get client information. | |
218 | * | |
219 | * \param inode device inode. | |
6c340eac | 220 | * \param file_priv DRM file private. |
1da177e4 LT |
221 | * \param cmd command. |
222 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 223 | * |
1da177e4 LT |
224 | * \return zero on success or a negative number on failure. |
225 | * | |
226 | * Searches for the client with the specified index and copies its information | |
227 | * into userspace | |
228 | */ | |
c153f45f EA |
229 | int drm_getclient(struct drm_device *dev, void *data, |
230 | struct drm_file *file_priv) | |
1da177e4 | 231 | { |
c153f45f | 232 | struct drm_client *client = data; |
09b4ea47 | 233 | |
719524df DV |
234 | /* |
235 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools | |
236 | * not breaking completely. Userspace tools stop enumerating one they | |
237 | * get -EINVAL, hence this is the return value we need to hand back for | |
238 | * no clients tracked. | |
239 | * | |
240 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun | |
241 | * attempt to figure out whether they're authenticated or not. Since | |
242 | * that's the only thing they care about, give it to the directly | |
243 | * instead of walking one giant list. | |
244 | */ | |
245 | if (client->idx == 0) { | |
246 | client->auth = file_priv->authenticated; | |
247 | client->pid = pid_vnr(file_priv->pid); | |
248 | client->uid = from_kuid_munged(current_user_ns(), | |
249 | file_priv->uid); | |
250 | client->magic = 0; | |
251 | client->iocs = 0; | |
252 | ||
253 | return 0; | |
254 | } else { | |
255 | return -EINVAL; | |
bd1b331f | 256 | } |
1da177e4 LT |
257 | } |
258 | ||
b5e89ed5 DA |
259 | /** |
260 | * Get statistics information. | |
261 | * | |
1da177e4 | 262 | * \param inode device inode. |
6c340eac | 263 | * \param file_priv DRM file private. |
1da177e4 LT |
264 | * \param cmd command. |
265 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 266 | * |
1da177e4 LT |
267 | * \return zero on success or a negative number on failure. |
268 | */ | |
c153f45f EA |
269 | int drm_getstats(struct drm_device *dev, void *data, |
270 | struct drm_file *file_priv) | |
1da177e4 | 271 | { |
c153f45f | 272 | struct drm_stats *stats = data; |
1da177e4 | 273 | |
d79cdc83 | 274 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 275 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 276 | |
1da177e4 LT |
277 | return 0; |
278 | } | |
279 | ||
9f35421e BS |
280 | /** |
281 | * Get device/driver capabilities | |
282 | */ | |
283 | int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
284 | { | |
285 | struct drm_get_cap *req = data; | |
286 | ||
287 | req->value = 0; | |
e73f88af DA |
288 | switch (req->capability) { |
289 | case DRM_CAP_DUMB_BUFFER: | |
290 | if (dev->driver->dumb_create) | |
291 | req->value = 1; | |
292 | break; | |
51eab416 | 293 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
294 | req->value = 1; |
295 | break; | |
019d96cb DA |
296 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
297 | req->value = dev->mode_config.preferred_depth; | |
298 | break; | |
299 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
300 | req->value = dev->mode_config.prefer_shadow; | |
301 | break; | |
4271a409 DA |
302 | case DRM_CAP_PRIME: |
303 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
304 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
305 | break; | |
c61eef72 ID |
306 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
307 | req->value = drm_timestamp_monotonic; | |
308 | break; | |
62f2104f KP |
309 | case DRM_CAP_ASYNC_PAGE_FLIP: |
310 | req->value = dev->mode_config.async_page_flip; | |
311 | break; | |
8716ed4e AD |
312 | case DRM_CAP_CURSOR_WIDTH: |
313 | if (dev->mode_config.cursor_width) | |
314 | req->value = dev->mode_config.cursor_width; | |
315 | else | |
316 | req->value = 64; | |
317 | break; | |
318 | case DRM_CAP_CURSOR_HEIGHT: | |
319 | if (dev->mode_config.cursor_height) | |
320 | req->value = dev->mode_config.cursor_height; | |
321 | else | |
322 | req->value = 64; | |
323 | break; | |
e73f88af DA |
324 | default: |
325 | return -EINVAL; | |
326 | } | |
9f35421e BS |
327 | return 0; |
328 | } | |
329 | ||
1c0814fe DL |
330 | /** |
331 | * Set device/driver capabilities | |
332 | */ | |
333 | int | |
334 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
335 | { | |
61d8e328 DL |
336 | struct drm_set_client_cap *req = data; |
337 | ||
338 | switch (req->capability) { | |
339 | case DRM_CLIENT_CAP_STEREO_3D: | |
340 | if (req->value > 1) | |
341 | return -EINVAL; | |
342 | file_priv->stereo_allowed = req->value; | |
343 | break; | |
681e7ec7 MR |
344 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
345 | if (!drm_universal_planes) | |
346 | return -EINVAL; | |
347 | if (req->value > 1) | |
348 | return -EINVAL; | |
349 | file_priv->universal_planes = req->value; | |
350 | break; | |
61d8e328 DL |
351 | default: |
352 | return -EINVAL; | |
353 | } | |
354 | ||
355 | return 0; | |
1c0814fe DL |
356 | } |
357 | ||
1da177e4 LT |
358 | /** |
359 | * Setversion ioctl. | |
360 | * | |
361 | * \param inode device inode. | |
6c340eac | 362 | * \param file_priv DRM file private. |
1da177e4 LT |
363 | * \param cmd command. |
364 | * \param arg user argument, pointing to a drm_lock structure. | |
365 | * \return zero on success or negative number on failure. | |
366 | * | |
367 | * Sets the requested interface version | |
368 | */ | |
c153f45f | 369 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 370 | { |
c153f45f EA |
371 | struct drm_set_version *sv = data; |
372 | int if_version, retcode = 0; | |
373 | ||
374 | if (sv->drm_di_major != -1) { | |
375 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
376 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
377 | retcode = -EINVAL; | |
378 | goto done; | |
379 | } | |
380 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
381 | sv->drm_di_minor); | |
3d77461e | 382 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 383 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
384 | /* |
385 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 386 | * Version 1.4 has proper PCI domain support |
1da177e4 | 387 | */ |
3fb688fd CW |
388 | retcode = drm_set_busid(dev, file_priv); |
389 | if (retcode) | |
390 | goto done; | |
1da177e4 LT |
391 | } |
392 | } | |
393 | ||
c153f45f EA |
394 | if (sv->drm_dd_major != -1) { |
395 | if (sv->drm_dd_major != dev->driver->major || | |
396 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
397 | dev->driver->minor) { | |
398 | retcode = -EINVAL; | |
399 | goto done; | |
400 | } | |
1da177e4 | 401 | } |
c153f45f EA |
402 | |
403 | done: | |
404 | sv->drm_di_major = DRM_IF_MAJOR; | |
405 | sv->drm_di_minor = DRM_IF_MINOR; | |
406 | sv->drm_dd_major = dev->driver->major; | |
407 | sv->drm_dd_minor = dev->driver->minor; | |
408 | ||
409 | return retcode; | |
1da177e4 LT |
410 | } |
411 | ||
412 | /** No-op ioctl. */ | |
c153f45f EA |
413 | int drm_noop(struct drm_device *dev, void *data, |
414 | struct drm_file *file_priv) | |
1da177e4 LT |
415 | { |
416 | DRM_DEBUG("\n"); | |
417 | return 0; | |
418 | } | |
b2c606fe | 419 | EXPORT_SYMBOL(drm_noop); |