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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 "drmP.h"
37#include "drm_core.h"
38
39#include "linux/pci.h"
40#include "linux/export.h"
41
42/**
43 * Get the bus id.
44 *
45 * \param inode device inode.
46 * \param file_priv DRM file private.
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 */
53int drm_getunique(struct drm_device *dev, void *data,
54 struct drm_file *file_priv)
55{
56 struct drm_unique *u = data;
57 struct drm_master *master = file_priv->master;
58
59 if (u->unique_len >= master->unique_len) {
60 if (copy_to_user(u->unique, master->unique, master->unique_len))
61 return -EFAULT;
62 }
63 u->unique_len = master->unique_len;
64
65 return 0;
66}
67
68static void
69drm_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
81/**
82 * Set the bus id.
83 *
84 * \param inode device inode.
85 * \param file_priv DRM file private.
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 */
95int drm_setunique(struct drm_device *dev, void *data,
96 struct drm_file *file_priv)
97{
98 struct drm_unique *u = data;
99 struct drm_master *master = file_priv->master;
100 int ret;
101
102 if (master->unique_len || master->unique)
103 return -EBUSY;
104
105 if (!u->unique_len || u->unique_len > 1024)
106 return -EINVAL;
107
108 if (!dev->driver->bus->set_unique)
109 return -EINVAL;
110
111 ret = dev->driver->bus->set_unique(dev, master, u);
112 if (ret)
113 goto err;
114
115 return 0;
116
117err:
118 drm_unset_busid(dev, master);
119 return ret;
120}
121
122static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
123{
124 struct drm_master *master = file_priv->master;
125 int ret;
126
127 if (master->unique != NULL)
128 drm_unset_busid(dev, master);
129
130 ret = dev->driver->bus->set_busid(dev, master);
131 if (ret)
132 goto err;
133 return 0;
134err:
135 drm_unset_busid(dev, master);
136 return ret;
137}
138
139/**
140 * Get a mapping information.
141 *
142 * \param inode device inode.
143 * \param file_priv DRM file private.
144 * \param cmd command.
145 * \param arg user argument, pointing to a drm_map structure.
146 *
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 */
152int drm_getmap(struct drm_device *dev, void *data,
153 struct drm_file *file_priv)
154{
155 struct drm_map *map = data;
156 struct drm_map_list *r_list = NULL;
157 struct list_head *list;
158 int idx;
159 int i;
160
161 idx = map->offset;
162 if (idx < 0)
163 return -EINVAL;
164
165 i = 0;
166 mutex_lock(&dev->struct_mutex);
167 list_for_each(list, &dev->maplist) {
168 if (i == idx) {
169 r_list = list_entry(list, struct drm_map_list, head);
170 break;
171 }
172 i++;
173 }
174 if (!r_list || !r_list->map) {
175 mutex_unlock(&dev->struct_mutex);
176 return -EINVAL;
177 }
178
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;
185 mutex_unlock(&dev->struct_mutex);
186
187 return 0;
188}
189
190/**
191 * Get client information.
192 *
193 * \param inode device inode.
194 * \param file_priv DRM file private.
195 * \param cmd command.
196 * \param arg user argument, pointing to a drm_client structure.
197 *
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 */
203int drm_getclient(struct drm_device *dev, void *data,
204 struct drm_file *file_priv)
205{
206 struct drm_client *client = data;
207 struct drm_file *pt;
208 int idx;
209 int i;
210
211 idx = client->idx;
212 i = 0;
213
214 mutex_lock(&dev->struct_mutex);
215 list_for_each_entry(pt, &dev->filelist, lhead) {
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 }
226 }
227 mutex_unlock(&dev->struct_mutex);
228
229 return -EINVAL;
230}
231
232/**
233 * Get statistics information.
234 *
235 * \param inode device inode.
236 * \param file_priv DRM file private.
237 * \param cmd command.
238 * \param arg user argument, pointing to a drm_stats structure.
239 *
240 * \return zero on success or a negative number on failure.
241 */
242int drm_getstats(struct drm_device *dev, void *data,
243 struct drm_file *file_priv)
244{
245 struct drm_stats *stats = data;
246 int i;
247
248 memset(stats, 0, sizeof(*stats));
249
250 for (i = 0; i < dev->counters; i++) {
251 if (dev->types[i] == _DRM_STAT_LOCK)
252 stats->data[i].value =
253 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
254 else
255 stats->data[i].value = atomic_read(&dev->counts[i]);
256 stats->data[i].type = dev->types[i];
257 }
258
259 stats->count = dev->counters;
260
261 return 0;
262}
263
264/**
265 * Get device/driver capabilities
266 */
267int 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;
272 switch (req->capability) {
273 case DRM_CAP_DUMB_BUFFER:
274 if (dev->driver->dumb_create)
275 req->value = 1;
276 break;
277 case DRM_CAP_VBLANK_HIGH_CRTC:
278 req->value = 1;
279 break;
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;
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;
290 default:
291 return -EINVAL;
292 }
293 return 0;
294}
295
296/**
297 * Setversion ioctl.
298 *
299 * \param inode device inode.
300 * \param file_priv DRM file private.
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 */
307int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
308{
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);
320 dev->if_version = max(if_version, dev->if_version);
321 if (sv->drm_di_minor >= 1) {
322 /*
323 * Version 1.1 includes tying of DRM to specific device
324 * Version 1.4 has proper PCI domain support
325 */
326 retcode = drm_set_busid(dev, file_priv);
327 if (retcode)
328 goto done;
329 }
330 }
331
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 }
339
340 if (dev->driver->set_version)
341 dev->driver->set_version(dev, sv);
342 }
343
344done:
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;
351}
352
353/** No-op ioctl. */
354int drm_noop(struct drm_device *dev, void *data,
355 struct drm_file *file_priv)
356{
357 DRM_DEBUG("\n");
358 return 0;
359}
360EXPORT_SYMBOL(drm_noop);
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 <drm/drmP.h>
37#include <drm/drm_core.h>
38
39#include <linux/pci.h>
40#include <linux/export.h>
41#ifdef CONFIG_X86
42#include <asm/mtrr.h>
43#endif
44
45/**
46 * Get the bus id.
47 *
48 * \param inode device inode.
49 * \param file_priv DRM file private.
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 */
56int drm_getunique(struct drm_device *dev, void *data,
57 struct drm_file *file_priv)
58{
59 struct drm_unique *u = data;
60 struct drm_master *master = file_priv->master;
61
62 if (u->unique_len >= master->unique_len) {
63 if (copy_to_user(u->unique, master->unique, master->unique_len))
64 return -EFAULT;
65 }
66 u->unique_len = master->unique_len;
67
68 return 0;
69}
70
71static void
72drm_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
84/**
85 * Set the bus id.
86 *
87 * \param inode device inode.
88 * \param file_priv DRM file private.
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 */
98int drm_setunique(struct drm_device *dev, void *data,
99 struct drm_file *file_priv)
100{
101 struct drm_unique *u = data;
102 struct drm_master *master = file_priv->master;
103 int ret;
104
105 if (master->unique_len || master->unique)
106 return -EBUSY;
107
108 if (!u->unique_len || u->unique_len > 1024)
109 return -EINVAL;
110
111 if (!dev->driver->bus->set_unique)
112 return -EINVAL;
113
114 ret = dev->driver->bus->set_unique(dev, master, u);
115 if (ret)
116 goto err;
117
118 return 0;
119
120err:
121 drm_unset_busid(dev, master);
122 return ret;
123}
124
125static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
126{
127 struct drm_master *master = file_priv->master;
128 int ret;
129
130 if (master->unique != NULL)
131 drm_unset_busid(dev, master);
132
133 ret = dev->driver->bus->set_busid(dev, master);
134 if (ret)
135 goto err;
136 return 0;
137err:
138 drm_unset_busid(dev, master);
139 return ret;
140}
141
142/**
143 * Get a mapping information.
144 *
145 * \param inode device inode.
146 * \param file_priv DRM file private.
147 * \param cmd command.
148 * \param arg user argument, pointing to a drm_map structure.
149 *
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 */
155int drm_getmap(struct drm_device *dev, void *data,
156 struct drm_file *file_priv)
157{
158 struct drm_map *map = data;
159 struct drm_map_list *r_list = NULL;
160 struct list_head *list;
161 int idx;
162 int i;
163
164 idx = map->offset;
165 if (idx < 0)
166 return -EINVAL;
167
168 i = 0;
169 mutex_lock(&dev->struct_mutex);
170 list_for_each(list, &dev->maplist) {
171 if (i == idx) {
172 r_list = list_entry(list, struct drm_map_list, head);
173 break;
174 }
175 i++;
176 }
177 if (!r_list || !r_list->map) {
178 mutex_unlock(&dev->struct_mutex);
179 return -EINVAL;
180 }
181
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;
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
198 mutex_unlock(&dev->struct_mutex);
199
200 return 0;
201}
202
203/**
204 * Get client information.
205 *
206 * \param inode device inode.
207 * \param file_priv DRM file private.
208 * \param cmd command.
209 * \param arg user argument, pointing to a drm_client structure.
210 *
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 */
216int drm_getclient(struct drm_device *dev, void *data,
217 struct drm_file *file_priv)
218{
219 struct drm_client *client = data;
220
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;
243 }
244}
245
246/**
247 * Get statistics information.
248 *
249 * \param inode device inode.
250 * \param file_priv DRM file private.
251 * \param cmd command.
252 * \param arg user argument, pointing to a drm_stats structure.
253 *
254 * \return zero on success or a negative number on failure.
255 */
256int drm_getstats(struct drm_device *dev, void *data,
257 struct drm_file *file_priv)
258{
259 struct drm_stats *stats = data;
260
261 /* Clear stats to prevent userspace from eating its stack garbage. */
262 memset(stats, 0, sizeof(*stats));
263
264 return 0;
265}
266
267/**
268 * Get device/driver capabilities
269 */
270int 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;
275 switch (req->capability) {
276 case DRM_CAP_DUMB_BUFFER:
277 if (dev->driver->dumb_create)
278 req->value = 1;
279 break;
280 case DRM_CAP_VBLANK_HIGH_CRTC:
281 req->value = 1;
282 break;
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;
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;
293 case DRM_CAP_TIMESTAMP_MONOTONIC:
294 req->value = drm_timestamp_monotonic;
295 break;
296 case DRM_CAP_ASYNC_PAGE_FLIP:
297 req->value = dev->mode_config.async_page_flip;
298 break;
299 case DRM_CAP_CURSOR_WIDTH:
300 if (dev->mode_config.cursor_width)
301 req->value = dev->mode_config.cursor_width;
302 else
303 req->value = 64;
304 break;
305 case DRM_CAP_CURSOR_HEIGHT:
306 if (dev->mode_config.cursor_height)
307 req->value = dev->mode_config.cursor_height;
308 else
309 req->value = 64;
310 break;
311 default:
312 return -EINVAL;
313 }
314 return 0;
315}
316
317/**
318 * Set device/driver capabilities
319 */
320int
321drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
322{
323 struct drm_set_client_cap *req = data;
324
325 switch (req->capability) {
326 case DRM_CLIENT_CAP_STEREO_3D:
327 if (req->value > 1)
328 return -EINVAL;
329 file_priv->stereo_allowed = req->value;
330 break;
331 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
332 if (!drm_universal_planes)
333 return -EINVAL;
334 if (req->value > 1)
335 return -EINVAL;
336 file_priv->universal_planes = req->value;
337 break;
338 default:
339 return -EINVAL;
340 }
341
342 return 0;
343}
344
345/**
346 * Setversion ioctl.
347 *
348 * \param inode device inode.
349 * \param file_priv DRM file private.
350 * \param cmd command.
351 * \param arg user argument, pointing to a drm_lock structure.
352 * \return zero on success or negative number on failure.
353 *
354 * Sets the requested interface version
355 */
356int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
357{
358 struct drm_set_version *sv = data;
359 int if_version, retcode = 0;
360
361 if (sv->drm_di_major != -1) {
362 if (sv->drm_di_major != DRM_IF_MAJOR ||
363 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
364 retcode = -EINVAL;
365 goto done;
366 }
367 if_version = DRM_IF_VERSION(sv->drm_di_major,
368 sv->drm_di_minor);
369 dev->if_version = max(if_version, dev->if_version);
370 if (sv->drm_di_minor >= 1) {
371 /*
372 * Version 1.1 includes tying of DRM to specific device
373 * Version 1.4 has proper PCI domain support
374 */
375 retcode = drm_set_busid(dev, file_priv);
376 if (retcode)
377 goto done;
378 }
379 }
380
381 if (sv->drm_dd_major != -1) {
382 if (sv->drm_dd_major != dev->driver->major ||
383 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
384 dev->driver->minor) {
385 retcode = -EINVAL;
386 goto done;
387 }
388 }
389
390done:
391 sv->drm_di_major = DRM_IF_MAJOR;
392 sv->drm_di_minor = DRM_IF_MINOR;
393 sv->drm_dd_major = dev->driver->major;
394 sv->drm_dd_minor = dev->driver->minor;
395
396 return retcode;
397}
398
399/** No-op ioctl. */
400int drm_noop(struct drm_device *dev, void *data,
401 struct drm_file *file_priv)
402{
403 DRM_DEBUG("\n");
404 return 0;
405}
406EXPORT_SYMBOL(drm_noop);