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1da177e4 LT |
1 | /** |
2 | * \file drm_ioctl.h | |
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 | ||
41 | /** | |
42 | * Get the bus id. | |
43 | * | |
44 | * \param inode device inode. | |
45 | * \param filp file pointer. | |
46 | * \param cmd command. | |
47 | * \param arg user argument, pointing to a drm_unique structure. | |
48 | * \return zero on success or a negative number on failure. | |
49 | * | |
50 | * Copies the bus id from drm_device::unique into user space. | |
51 | */ | |
52 | int drm_getunique(struct inode *inode, struct file *filp, | |
53 | unsigned int cmd, unsigned long arg) | |
54 | { | |
55 | drm_file_t *priv = filp->private_data; | |
56 | drm_device_t *dev = priv->head->dev; | |
57 | drm_unique_t __user *argp = (void __user *)arg; | |
58 | drm_unique_t u; | |
59 | ||
60 | if (copy_from_user(&u, argp, sizeof(u))) | |
61 | return -EFAULT; | |
62 | if (u.unique_len >= dev->unique_len) { | |
63 | if (copy_to_user(u.unique, dev->unique, dev->unique_len)) | |
64 | return -EFAULT; | |
65 | } | |
66 | u.unique_len = dev->unique_len; | |
67 | if (copy_to_user(argp, &u, sizeof(u))) | |
68 | return -EFAULT; | |
69 | return 0; | |
70 | } | |
71 | ||
72 | /** | |
73 | * Set the bus id. | |
74 | * | |
75 | * \param inode device inode. | |
76 | * \param filp file pointer. | |
77 | * \param cmd command. | |
78 | * \param arg user argument, pointing to a drm_unique structure. | |
79 | * \return zero on success or a negative number on failure. | |
80 | * | |
81 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
82 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
83 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
84 | * version 1.1 or greater. | |
85 | */ | |
86 | int drm_setunique(struct inode *inode, struct file *filp, | |
87 | unsigned int cmd, unsigned long arg) | |
88 | { | |
89 | drm_file_t *priv = filp->private_data; | |
90 | drm_device_t *dev = priv->head->dev; | |
91 | drm_unique_t u; | |
92 | int domain, bus, slot, func, ret; | |
93 | ||
94 | if (dev->unique_len || dev->unique) return -EBUSY; | |
95 | ||
96 | if (copy_from_user(&u, (drm_unique_t __user *)arg, sizeof(u))) | |
97 | return -EFAULT; | |
98 | ||
99 | if (!u.unique_len || u.unique_len > 1024) return -EINVAL; | |
100 | ||
101 | dev->unique_len = u.unique_len; | |
102 | dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER); | |
103 | if(!dev->unique) return -ENOMEM; | |
104 | if (copy_from_user(dev->unique, u.unique, dev->unique_len)) | |
105 | return -EFAULT; | |
106 | ||
107 | dev->unique[dev->unique_len] = '\0'; | |
108 | ||
109 | dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + strlen(dev->unique) + 2, | |
110 | DRM_MEM_DRIVER); | |
111 | if (!dev->devname) | |
112 | return -ENOMEM; | |
113 | ||
114 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique); | |
115 | ||
116 | /* Return error if the busid submitted doesn't match the device's actual | |
117 | * busid. | |
118 | */ | |
119 | ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func); | |
120 | if (ret != 3) | |
121 | return DRM_ERR(EINVAL); | |
122 | domain = bus >> 8; | |
123 | bus &= 0xff; | |
124 | ||
125 | if ((domain != dev->pci_domain) || | |
126 | (bus != dev->pci_bus) || | |
127 | (slot != dev->pci_slot) || | |
128 | (func != dev->pci_func)) | |
129 | return -EINVAL; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int | |
135 | drm_set_busid(drm_device_t *dev) | |
136 | { | |
137 | if (dev->unique != NULL) | |
138 | return EBUSY; | |
139 | ||
140 | dev->unique_len = 20; | |
141 | dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); | |
142 | if (dev->unique == NULL) | |
143 | return ENOMEM; | |
144 | ||
145 | snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", | |
146 | dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); | |
147 | ||
148 | dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len + 2, | |
149 | DRM_MEM_DRIVER); | |
150 | if (dev->devname == NULL) | |
151 | return ENOMEM; | |
152 | ||
153 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | ||
159 | /** | |
160 | * Get a mapping information. | |
161 | * | |
162 | * \param inode device inode. | |
163 | * \param filp file pointer. | |
164 | * \param cmd command. | |
165 | * \param arg user argument, pointing to a drm_map structure. | |
166 | * | |
167 | * \return zero on success or a negative number on failure. | |
168 | * | |
169 | * Searches for the mapping with the specified offset and copies its information | |
170 | * into userspace | |
171 | */ | |
172 | int drm_getmap( struct inode *inode, struct file *filp, | |
173 | unsigned int cmd, unsigned long arg ) | |
174 | { | |
175 | drm_file_t *priv = filp->private_data; | |
176 | drm_device_t *dev = priv->head->dev; | |
177 | drm_map_t __user *argp = (void __user *)arg; | |
178 | drm_map_t map; | |
179 | drm_map_list_t *r_list = NULL; | |
180 | struct list_head *list; | |
181 | int idx; | |
182 | int i; | |
183 | ||
184 | if (copy_from_user(&map, argp, sizeof(map))) | |
185 | return -EFAULT; | |
186 | idx = map.offset; | |
187 | ||
188 | down(&dev->struct_sem); | |
189 | if (idx < 0) { | |
190 | up(&dev->struct_sem); | |
191 | return -EINVAL; | |
192 | } | |
193 | ||
194 | i = 0; | |
195 | list_for_each(list, &dev->maplist->head) { | |
196 | if(i == idx) { | |
197 | r_list = list_entry(list, drm_map_list_t, head); | |
198 | break; | |
199 | } | |
200 | i++; | |
201 | } | |
202 | if(!r_list || !r_list->map) { | |
203 | up(&dev->struct_sem); | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | map.offset = r_list->map->offset; | |
208 | map.size = r_list->map->size; | |
209 | map.type = r_list->map->type; | |
210 | map.flags = r_list->map->flags; | |
d1f2b55a | 211 | map.handle = (void *)(unsigned long) r_list->user_token; |
1da177e4 LT |
212 | map.mtrr = r_list->map->mtrr; |
213 | up(&dev->struct_sem); | |
214 | ||
215 | if (copy_to_user(argp, &map, sizeof(map))) return -EFAULT; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | /** | |
220 | * Get client information. | |
221 | * | |
222 | * \param inode device inode. | |
223 | * \param filp file pointer. | |
224 | * \param cmd command. | |
225 | * \param arg user argument, pointing to a drm_client structure. | |
226 | * | |
227 | * \return zero on success or a negative number on failure. | |
228 | * | |
229 | * Searches for the client with the specified index and copies its information | |
230 | * into userspace | |
231 | */ | |
232 | int drm_getclient( struct inode *inode, struct file *filp, | |
233 | unsigned int cmd, unsigned long arg ) | |
234 | { | |
235 | drm_file_t *priv = filp->private_data; | |
236 | drm_device_t *dev = priv->head->dev; | |
237 | drm_client_t __user *argp = (void __user *)arg; | |
238 | drm_client_t client; | |
239 | drm_file_t *pt; | |
240 | int idx; | |
241 | int i; | |
242 | ||
243 | if (copy_from_user(&client, argp, sizeof(client))) | |
244 | return -EFAULT; | |
245 | idx = client.idx; | |
246 | down(&dev->struct_sem); | |
247 | for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) | |
248 | ; | |
249 | ||
250 | if (!pt) { | |
251 | up(&dev->struct_sem); | |
252 | return -EINVAL; | |
253 | } | |
254 | client.auth = pt->authenticated; | |
255 | client.pid = pt->pid; | |
256 | client.uid = pt->uid; | |
257 | client.magic = pt->magic; | |
258 | client.iocs = pt->ioctl_count; | |
259 | up(&dev->struct_sem); | |
260 | ||
261 | if (copy_to_user((drm_client_t __user *)arg, &client, sizeof(client))) | |
262 | return -EFAULT; | |
263 | return 0; | |
264 | } | |
265 | ||
266 | /** | |
267 | * Get statistics information. | |
268 | * | |
269 | * \param inode device inode. | |
270 | * \param filp file pointer. | |
271 | * \param cmd command. | |
272 | * \param arg user argument, pointing to a drm_stats structure. | |
273 | * | |
274 | * \return zero on success or a negative number on failure. | |
275 | */ | |
276 | int drm_getstats( struct inode *inode, struct file *filp, | |
277 | unsigned int cmd, unsigned long arg ) | |
278 | { | |
279 | drm_file_t *priv = filp->private_data; | |
280 | drm_device_t *dev = priv->head->dev; | |
281 | drm_stats_t stats; | |
282 | int i; | |
283 | ||
284 | memset(&stats, 0, sizeof(stats)); | |
285 | ||
286 | down(&dev->struct_sem); | |
287 | ||
288 | for (i = 0; i < dev->counters; i++) { | |
289 | if (dev->types[i] == _DRM_STAT_LOCK) | |
290 | stats.data[i].value | |
291 | = (dev->lock.hw_lock | |
292 | ? dev->lock.hw_lock->lock : 0); | |
293 | else | |
294 | stats.data[i].value = atomic_read(&dev->counts[i]); | |
295 | stats.data[i].type = dev->types[i]; | |
296 | } | |
297 | ||
298 | stats.count = dev->counters; | |
299 | ||
300 | up(&dev->struct_sem); | |
301 | ||
302 | if (copy_to_user((drm_stats_t __user *)arg, &stats, sizeof(stats))) | |
303 | return -EFAULT; | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /** | |
308 | * Setversion ioctl. | |
309 | * | |
310 | * \param inode device inode. | |
311 | * \param filp file pointer. | |
312 | * \param cmd command. | |
313 | * \param arg user argument, pointing to a drm_lock structure. | |
314 | * \return zero on success or negative number on failure. | |
315 | * | |
316 | * Sets the requested interface version | |
317 | */ | |
318 | int drm_setversion(DRM_IOCTL_ARGS) | |
319 | { | |
320 | DRM_DEVICE; | |
321 | drm_set_version_t sv; | |
322 | drm_set_version_t retv; | |
323 | int if_version; | |
324 | drm_set_version_t __user *argp = (void __user *)data; | |
325 | drm_version_t version; | |
326 | ||
327 | DRM_COPY_FROM_USER_IOCTL(sv, argp, sizeof(sv)); | |
328 | ||
329 | memset(&version, 0, sizeof(version)); | |
330 | ||
331 | dev->driver->version(&version); | |
332 | retv.drm_di_major = DRM_IF_MAJOR; | |
333 | retv.drm_di_minor = DRM_IF_MINOR; | |
334 | retv.drm_dd_major = version.version_major; | |
335 | retv.drm_dd_minor = version.version_minor; | |
336 | ||
337 | DRM_COPY_TO_USER_IOCTL(argp, retv, sizeof(sv)); | |
338 | ||
339 | if (sv.drm_di_major != -1) { | |
340 | if (sv.drm_di_major != DRM_IF_MAJOR || | |
341 | sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR) | |
342 | return EINVAL; | |
343 | if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_dd_minor); | |
344 | dev->if_version = DRM_MAX(if_version, dev->if_version); | |
345 | if (sv.drm_di_minor >= 1) { | |
346 | /* | |
347 | * Version 1.1 includes tying of DRM to specific device | |
348 | */ | |
349 | drm_set_busid(dev); | |
350 | } | |
351 | } | |
352 | ||
353 | if (sv.drm_dd_major != -1) { | |
354 | if (sv.drm_dd_major != version.version_major || | |
355 | sv.drm_dd_minor < 0 || sv.drm_dd_minor > version.version_minor) | |
356 | return EINVAL; | |
357 | ||
358 | if (dev->driver->set_version) | |
359 | dev->driver->set_version(dev, &sv); | |
360 | } | |
361 | return 0; | |
362 | } | |
363 | ||
364 | /** No-op ioctl. */ | |
365 | int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd, | |
366 | unsigned long arg) | |
367 | { | |
368 | DRM_DEBUG("\n"); | |
369 | return 0; | |
370 | } |