1 /*
2 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
3 */
4
5 /*
6 * Copyright (c) 2012 Intel Corporation. All rights reserved.
7 */
8
9 /**
10 * \file drm_ioctl.c
11 * IOCTL processing for DRM
12 *
13 * \author Rickard E. (Rik) Faith <faith@valinux.com>
14 * \author Gareth Hughes <gareth@valinux.com>
15 */
16
17 /*
18 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
19 *
20 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
21 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
22 * All Rights Reserved.
23 *
24 * Permission is hereby granted, free of charge, to any person obtaining a
25 * copy of this software and associated documentation files (the "Software"),
26 * to deal in the Software without restriction, including without limitation
27 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
28 * and/or sell copies of the Software, and to permit persons to whom the
29 * Software is furnished to do so, subject to the following conditions:
30 *
31 * The above copyright notice and this permission notice (including the next
32 * paragraph) shall be included in all copies or substantial portions of the
33 * Software.
34 *
35 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
36 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
37 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
38 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
39 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
40 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
41 * OTHER DEALINGS IN THE SOFTWARE.
42 */
43
44 #include "drmP.h"
45 #include "drm_core.h"
46 #include "drm_io32.h"
47
48 /**
49 * Get the bus id.
50 *
51 * \param inode device inode.
52 * \param file_priv DRM file private.
53 * \param cmd command.
54 * \param arg user argument, pointing to a drm_unique structure.
55 * \return zero on success or a negative number on failure.
56 *
57 * Copies the bus id from drm_device::unique into user space.
58 */
59 /* LINTED */
drm_getunique(DRM_IOCTL_ARGS)60 int drm_getunique(DRM_IOCTL_ARGS)
61 {
62 struct drm_unique *u = data;
63 struct drm_master *master = file->master;
64
65 if (master->unique_len == 0 || master->unique == NULL) {
66 return -EFAULT;
67 }
68
69 if (u->unique_len >= master->unique_len) {
70 if (u->unique == NULL) {
71 return -EINVAL;
72 }
73 if (DRM_COPY_TO_USER(u->unique, master->unique, master->unique_len))
74 return -EFAULT;
75 }
76 u->unique_len = master->unique_len;
77
78 return 0;
79 }
80
81 /*
82 * Deprecated in DRM version 1.1, and will return EBUSY when setversion has
83 * requested version 1.1 or greater.
84 */
85 /* LINTED */
drm_setunique(DRM_IOCTL_ARGS)86 int drm_setunique(DRM_IOCTL_ARGS)
87 {
88 return -EINVAL;
89 }
90
drm_set_busid(struct drm_device * dev,struct drm_file * file_priv)91 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
92 {
93 struct drm_master *master = file_priv->master;
94 int len;
95
96 if (master->unique != NULL)
97 return -EBUSY;
98
99 master->unique_len = 40;
100 master->unique_size = master->unique_len;
101 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
102 if (master->unique == NULL)
103 return -ENOMEM;
104
105 len = snprintf(master->unique, master->unique_len, "pci:%04x:%02x:%02x.%1x",
106 dev->pdev->domain, dev->pdev->bus, dev->pdev->slot, dev->pdev->func);
107 if (len >= master->unique_len)
108 DRM_ERROR("buffer overflow");
109 else
110 master->unique_len = len;
111
112 return 0;
113 }
114
115 /**
116 * Get a mapping information.
117 *
118 * \param inode device inode.
119 * \param file_priv DRM file private.
120 * \param cmd command.
121 * \param arg user argument, pointing to a drm_map structure.
122 *
123 * \return zero on success or a negative number on failure.
124 *
125 * Searches for the mapping with the specified offset and copies its information
126 * into userspace
127 */
128 /* LINTED */
drm_getmap(DRM_IOCTL_ARGS)129 int drm_getmap(DRM_IOCTL_ARGS)
130 {
131 struct drm_map *map = data;
132 struct drm_map_list *r_list = NULL;
133 struct list_head *list;
134 int idx;
135 int i;
136
137 idx = (int)map->offset;
138 if (idx < 0)
139 return -EINVAL;
140
141 i = 0;
142 mutex_lock(&dev->struct_mutex);
143 list_for_each(list, &dev->maplist) {
144 if (i == idx) {
145 r_list = list_entry(list, struct drm_map_list, head);
146 break;
147 }
148 i++;
149 }
150 if (!r_list || !r_list->map) {
151 mutex_unlock(&dev->struct_mutex);
152 return -EINVAL;
153 }
154
155 map->offset = r_list->map->offset;
156 map->size = r_list->map->size;
157 map->type = r_list->map->type;
158 map->flags = r_list->map->flags;
159 map->handle = (unsigned long long)(uintptr_t)r_list->user_token;
160 map->mtrr = r_list->map->mtrr;
161 mutex_unlock(&dev->struct_mutex);
162
163 return 0;
164 }
165
166 /**
167 * Get client information.
168 *
169 * \param inode device inode.
170 * \param file_priv DRM file private.
171 * \param cmd command.
172 * \param arg user argument, pointing to a drm_client structure.
173 *
174 * \return zero on success or a negative number on failure.
175 *
176 * Searches for the client with the specified index and copies its information
177 * into userspace
178 */
179 /* LINTED */
drm_getclient(DRM_IOCTL_ARGS)180 int drm_getclient(DRM_IOCTL_ARGS)
181 {
182 struct drm_client *client = data;
183 struct drm_file *pt;
184 int idx;
185 int i;
186
187 idx = client->idx;
188 i = 0;
189
190 mutex_lock(&dev->struct_mutex);
191 list_for_each_entry(pt, struct drm_file, &dev->filelist, lhead){
192 if (i++ >= idx) {
193 client->auth = pt->authenticated;
194 client->pid = pt->pid;
195 client->uid = pt->uid;
196 client->magic = pt->magic;
197 client->iocs = pt->ioctl_count;
198 mutex_unlock(&dev->struct_mutex);
199
200 return 0;
201 }
202 }
203 mutex_unlock(&dev->struct_mutex);
204
205 return -EINVAL;
206 }
207
208 /**
209 * Get statistics information.
210 *
211 * \param inode device inode.
212 * \param file_priv DRM file private.
213 * \param cmd command.
214 * \param arg user argument, pointing to a drm_stats structure.
215 *
216 * \return zero on success or a negative number on failure.
217 */
218 /* LINTED E_FUNC_ARG_UNUSED */
drm_getstats(DRM_IOCTL_ARGS)219 int drm_getstats(DRM_IOCTL_ARGS)
220 {
221 struct drm_stats *stats = data;
222 int i;
223
224 (void) memset(stats, 0, sizeof(*stats));
225
226 for (i = 0; i < dev->counters; i++) {
227 if (dev->types[i] == _DRM_STAT_LOCK)
228 stats->data[i].value =
229 (file->master->lock.hw_lock ? file->master->lock.hw_lock->lock : 0);
230 else
231 stats->data[i].value = atomic_read(&dev->counts[i]);
232 stats->data[i].type = dev->types[i];
233 }
234
235 stats->count = dev->counters;
236
237 return 0;
238 }
239
240 /**
241 * Get device/driver capabilities
242 */
243 /* LINTED E_FUNC_ARG_UNUSED */
drm_getcap(DRM_IOCTL_ARGS)244 int drm_getcap(DRM_IOCTL_ARGS)
245 {
246 struct drm_get_cap *req = data;
247
248 req->value = 0;
249 switch (req->capability) {
250 case DRM_CAP_DUMB_BUFFER:
251 if (dev->driver->dumb_create)
252 req->value = 1;
253 break;
254 case DRM_CAP_VBLANK_HIGH_CRTC:
255 req->value = 1;
256 break;
257 case DRM_CAP_DUMB_PREFERRED_DEPTH:
258 req->value = dev->mode_config.preferred_depth;
259 break;
260 case DRM_CAP_DUMB_PREFER_SHADOW:
261 req->value = dev->mode_config.prefer_shadow;
262 break;
263 default:
264 return -EINVAL;
265 }
266 return 0;
267 }
268
269 /**
270 * Setversion ioctl.
271 *
272 * \param inode device inode.
273 * \param file_priv DRM file private.
274 * \param cmd command.
275 * \param arg user argument, pointing to a drm_lock structure.
276 * \return zero on success or negative number on failure.
277 *
278 * Sets the requested interface version
279 */
280 /* LINTED */
drm_setversion(DRM_IOCTL_ARGS)281 int drm_setversion(DRM_IOCTL_ARGS)
282 {
283 struct drm_set_version *sv = data;
284 int if_version, retcode = 0;
285
286 if (sv->drm_di_major != -1) {
287 if (sv->drm_di_major != DRM_IF_MAJOR ||
288 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
289 retcode = -EINVAL;
290 goto done;
291 }
292 if_version = DRM_IF_VERSION(sv->drm_di_major,
293 sv->drm_di_minor);
294 dev->if_version = DRM_MAX(if_version, dev->if_version);
295 if (sv->drm_di_minor >= 1) {
296 /*
297 * Version 1.1 includes tying of DRM to specific device
298 */
299 (void) drm_set_busid(dev, file);
300 }
301 }
302
303 if (sv->drm_dd_major != -1) {
304 if (sv->drm_dd_major != dev->driver->major ||
305 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
306 dev->driver->minor) {
307 retcode = -EINVAL;
308 goto done;
309 }
310
311 /* OSOL_drm: if (dev->driver->set_version)
312 dev->driver->set_version(dev, sv); */
313 }
314
315 done:
316 sv->drm_di_major = DRM_IF_MAJOR;
317 sv->drm_di_minor = DRM_IF_MINOR;
318 sv->drm_dd_major = dev->driver->major;
319 sv->drm_dd_minor = dev->driver->minor;
320
321 return retcode;
322 }
323
324 /** No-op ioctl. */
325 /* LINTED */
drm_noop(DRM_IOCTL_ARGS)326 int drm_noop(DRM_IOCTL_ARGS)
327 {
328 DRM_DEBUG("\n");
329 return 0;
330 }
331
332