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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 | ||
36 | #include "drmP.h" | |
37 | #include "drm_core.h" | |
38 | ||
39 | #include "linux/pci.h" | |
40 | ||
41 | /** | |
42 | * Get the bus id. | |
b5e89ed5 | 43 | * |
1da177e4 | 44 | * \param inode device inode. |
6c340eac | 45 | * \param file_priv DRM file private. |
1da177e4 LT |
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 | */ | |
c153f45f EA |
52 | int drm_getunique(struct drm_device *dev, void *data, |
53 | struct drm_file *file_priv) | |
1da177e4 | 54 | { |
c153f45f | 55 | struct drm_unique *u = data; |
1da177e4 | 56 | |
c153f45f EA |
57 | if (u->unique_len >= dev->unique_len) { |
58 | if (copy_to_user(u->unique, dev->unique, dev->unique_len)) | |
1da177e4 LT |
59 | return -EFAULT; |
60 | } | |
c153f45f EA |
61 | u->unique_len = dev->unique_len; |
62 | ||
1da177e4 LT |
63 | return 0; |
64 | } | |
65 | ||
66 | /** | |
67 | * Set the bus id. | |
b5e89ed5 | 68 | * |
1da177e4 | 69 | * \param inode device inode. |
6c340eac | 70 | * \param file_priv DRM file private. |
1da177e4 LT |
71 | * \param cmd command. |
72 | * \param arg user argument, pointing to a drm_unique structure. | |
73 | * \return zero on success or a negative number on failure. | |
74 | * | |
75 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
76 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
77 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
78 | * version 1.1 or greater. | |
79 | */ | |
c153f45f EA |
80 | int drm_setunique(struct drm_device *dev, void *data, |
81 | struct drm_file *file_priv) | |
1da177e4 | 82 | { |
c153f45f | 83 | struct drm_unique *u = data; |
b5e89ed5 | 84 | int domain, bus, slot, func, ret; |
1da177e4 | 85 | |
b5e89ed5 DA |
86 | if (dev->unique_len || dev->unique) |
87 | return -EBUSY; | |
1da177e4 | 88 | |
c153f45f | 89 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 90 | return -EINVAL; |
1da177e4 | 91 | |
c153f45f EA |
92 | dev->unique_len = u->unique_len; |
93 | dev->unique = drm_alloc(u->unique_len + 1, DRM_MEM_DRIVER); | |
b5e89ed5 DA |
94 | if (!dev->unique) |
95 | return -ENOMEM; | |
c153f45f | 96 | if (copy_from_user(dev->unique, u->unique, dev->unique_len)) |
1da177e4 LT |
97 | return -EFAULT; |
98 | ||
99 | dev->unique[dev->unique_len] = '\0'; | |
100 | ||
b5e89ed5 DA |
101 | dev->devname = |
102 | drm_alloc(strlen(dev->driver->pci_driver.name) + | |
103 | strlen(dev->unique) + 2, DRM_MEM_DRIVER); | |
1da177e4 LT |
104 | if (!dev->devname) |
105 | return -ENOMEM; | |
106 | ||
b5e89ed5 DA |
107 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, |
108 | dev->unique); | |
1da177e4 LT |
109 | |
110 | /* Return error if the busid submitted doesn't match the device's actual | |
111 | * busid. | |
112 | */ | |
113 | ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func); | |
114 | if (ret != 3) | |
20caafa6 | 115 | return -EINVAL; |
1da177e4 LT |
116 | domain = bus >> 8; |
117 | bus &= 0xff; | |
b5e89ed5 | 118 | |
33229601 | 119 | if ((domain != drm_get_pci_domain(dev)) || |
242ef0e1 D |
120 | (bus != dev->pdev->bus->number) || |
121 | (slot != PCI_SLOT(dev->pdev->devfn)) || | |
122 | (func != PCI_FUNC(dev->pdev->devfn))) | |
1da177e4 LT |
123 | return -EINVAL; |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
84b1fd10 | 128 | static int drm_set_busid(struct drm_device * dev) |
1da177e4 | 129 | { |
fe34765b DA |
130 | int len; |
131 | ||
1da177e4 | 132 | if (dev->unique != NULL) |
1f27ce6a | 133 | return 0; |
1da177e4 | 134 | |
fe34765b | 135 | dev->unique_len = 40; |
1da177e4 LT |
136 | dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); |
137 | if (dev->unique == NULL) | |
1f27ce6a | 138 | return -ENOMEM; |
1da177e4 | 139 | |
fe34765b | 140 | len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", |
33229601 | 141 | drm_get_pci_domain(dev), dev->pdev->bus->number, |
242ef0e1 D |
142 | PCI_SLOT(dev->pdev->devfn), |
143 | PCI_FUNC(dev->pdev->devfn)); | |
1da177e4 | 144 | |
fe34765b DA |
145 | if (len > dev->unique_len) |
146 | DRM_ERROR("Unique buffer overflowed\n"); | |
147 | ||
b5e89ed5 DA |
148 | dev->devname = |
149 | drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len + | |
150 | 2, DRM_MEM_DRIVER); | |
1da177e4 | 151 | if (dev->devname == NULL) |
1f27ce6a | 152 | return -ENOMEM; |
1da177e4 | 153 | |
b5e89ed5 DA |
154 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, |
155 | dev->unique); | |
1da177e4 LT |
156 | |
157 | return 0; | |
158 | } | |
159 | ||
1da177e4 LT |
160 | /** |
161 | * Get a mapping information. | |
162 | * | |
163 | * \param inode device inode. | |
6c340eac | 164 | * \param file_priv DRM file private. |
1da177e4 LT |
165 | * \param cmd command. |
166 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 167 | * |
1da177e4 LT |
168 | * \return zero on success or a negative number on failure. |
169 | * | |
170 | * Searches for the mapping with the specified offset and copies its information | |
171 | * into userspace | |
172 | */ | |
c153f45f EA |
173 | int drm_getmap(struct drm_device *dev, void *data, |
174 | struct drm_file *file_priv) | |
1da177e4 | 175 | { |
c153f45f | 176 | struct drm_map *map = data; |
55910517 | 177 | struct drm_map_list *r_list = NULL; |
1da177e4 | 178 | struct list_head *list; |
b5e89ed5 DA |
179 | int idx; |
180 | int i; | |
1da177e4 | 181 | |
c153f45f | 182 | idx = map->offset; |
1da177e4 | 183 | |
30e2fb18 | 184 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 185 | if (idx < 0) { |
30e2fb18 | 186 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
187 | return -EINVAL; |
188 | } | |
189 | ||
190 | i = 0; | |
bd1b331f | 191 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 192 | if (i == idx) { |
55910517 | 193 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
194 | break; |
195 | } | |
196 | i++; | |
197 | } | |
b5e89ed5 | 198 | if (!r_list || !r_list->map) { |
30e2fb18 | 199 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
200 | return -EINVAL; |
201 | } | |
202 | ||
c153f45f EA |
203 | map->offset = r_list->map->offset; |
204 | map->size = r_list->map->size; | |
205 | map->type = r_list->map->type; | |
206 | map->flags = r_list->map->flags; | |
207 | map->handle = (void *)(unsigned long) r_list->user_token; | |
208 | map->mtrr = r_list->map->mtrr; | |
30e2fb18 | 209 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 210 | |
1da177e4 LT |
211 | return 0; |
212 | } | |
213 | ||
214 | /** | |
215 | * Get client information. | |
216 | * | |
217 | * \param inode device inode. | |
6c340eac | 218 | * \param file_priv DRM file private. |
1da177e4 LT |
219 | * \param cmd command. |
220 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 221 | * |
1da177e4 LT |
222 | * \return zero on success or a negative number on failure. |
223 | * | |
224 | * Searches for the client with the specified index and copies its information | |
225 | * into userspace | |
226 | */ | |
c153f45f EA |
227 | int drm_getclient(struct drm_device *dev, void *data, |
228 | struct drm_file *file_priv) | |
1da177e4 | 229 | { |
c153f45f | 230 | struct drm_client *client = data; |
84b1fd10 | 231 | struct drm_file *pt; |
b5e89ed5 DA |
232 | int idx; |
233 | int i; | |
1da177e4 | 234 | |
c153f45f | 235 | idx = client->idx; |
30e2fb18 | 236 | mutex_lock(&dev->struct_mutex); |
bc5f4523 | 237 | |
bd1b331f DA |
238 | i = 0; |
239 | list_for_each_entry(pt, &dev->filelist, lhead) { | |
b018fcda EA |
240 | if (i++ >= idx) { |
241 | client->auth = pt->authenticated; | |
242 | client->pid = pt->pid; | |
243 | client->uid = pt->uid; | |
244 | client->magic = pt->magic; | |
245 | client->iocs = pt->ioctl_count; | |
246 | mutex_unlock(&dev->struct_mutex); | |
247 | ||
248 | return 0; | |
249 | } | |
bd1b331f | 250 | } |
30e2fb18 | 251 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 252 | |
b018fcda | 253 | return -EINVAL; |
1da177e4 LT |
254 | } |
255 | ||
b5e89ed5 DA |
256 | /** |
257 | * Get statistics information. | |
258 | * | |
1da177e4 | 259 | * \param inode device inode. |
6c340eac | 260 | * \param file_priv DRM file private. |
1da177e4 LT |
261 | * \param cmd command. |
262 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 263 | * |
1da177e4 LT |
264 | * \return zero on success or a negative number on failure. |
265 | */ | |
c153f45f EA |
266 | int drm_getstats(struct drm_device *dev, void *data, |
267 | struct drm_file *file_priv) | |
1da177e4 | 268 | { |
c153f45f | 269 | struct drm_stats *stats = data; |
b5e89ed5 | 270 | int i; |
1da177e4 | 271 | |
246a3d18 | 272 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 273 | |
30e2fb18 | 274 | mutex_lock(&dev->struct_mutex); |
1da177e4 LT |
275 | |
276 | for (i = 0; i < dev->counters; i++) { | |
277 | if (dev->types[i] == _DRM_STAT_LOCK) | |
c153f45f EA |
278 | stats->data[i].value = |
279 | (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0); | |
b5e89ed5 | 280 | else |
c153f45f EA |
281 | stats->data[i].value = atomic_read(&dev->counts[i]); |
282 | stats->data[i].type = dev->types[i]; | |
1da177e4 | 283 | } |
b5e89ed5 | 284 | |
c153f45f | 285 | stats->count = dev->counters; |
1da177e4 | 286 | |
30e2fb18 | 287 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 288 | |
1da177e4 LT |
289 | return 0; |
290 | } | |
291 | ||
292 | /** | |
293 | * Setversion ioctl. | |
294 | * | |
295 | * \param inode device inode. | |
6c340eac | 296 | * \param file_priv DRM file private. |
1da177e4 LT |
297 | * \param cmd command. |
298 | * \param arg user argument, pointing to a drm_lock structure. | |
299 | * \return zero on success or negative number on failure. | |
300 | * | |
301 | * Sets the requested interface version | |
302 | */ | |
c153f45f | 303 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 304 | { |
c153f45f EA |
305 | struct drm_set_version *sv = data; |
306 | int if_version, retcode = 0; | |
307 | ||
308 | if (sv->drm_di_major != -1) { | |
309 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
310 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
311 | retcode = -EINVAL; | |
312 | goto done; | |
313 | } | |
314 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
315 | sv->drm_di_minor); | |
3d77461e | 316 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 317 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
318 | /* |
319 | * Version 1.1 includes tying of DRM to specific device | |
320 | */ | |
c153f45f | 321 | drm_set_busid(dev); |
1da177e4 LT |
322 | } |
323 | } | |
324 | ||
c153f45f EA |
325 | if (sv->drm_dd_major != -1) { |
326 | if (sv->drm_dd_major != dev->driver->major || | |
327 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
328 | dev->driver->minor) { | |
329 | retcode = -EINVAL; | |
330 | goto done; | |
331 | } | |
1da177e4 LT |
332 | |
333 | if (dev->driver->set_version) | |
c153f45f | 334 | dev->driver->set_version(dev, sv); |
1da177e4 | 335 | } |
c153f45f EA |
336 | |
337 | done: | |
338 | sv->drm_di_major = DRM_IF_MAJOR; | |
339 | sv->drm_di_minor = DRM_IF_MINOR; | |
340 | sv->drm_dd_major = dev->driver->major; | |
341 | sv->drm_dd_minor = dev->driver->minor; | |
342 | ||
343 | return retcode; | |
1da177e4 LT |
344 | } |
345 | ||
346 | /** No-op ioctl. */ | |
c153f45f EA |
347 | int drm_noop(struct drm_device *dev, void *data, |
348 | struct drm_file *file_priv) | |
1da177e4 LT |
349 | { |
350 | DRM_DEBUG("\n"); | |
351 | return 0; | |
352 | } |