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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 LT |
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, | |
b5e89ed5 | 53 | unsigned int cmd, unsigned long arg) |
1da177e4 | 54 | { |
b5e89ed5 DA |
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; | |
1da177e4 LT |
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. | |
b5e89ed5 | 74 | * |
1da177e4 LT |
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, | |
b5e89ed5 | 87 | unsigned int cmd, unsigned long arg) |
1da177e4 | 88 | { |
b5e89ed5 DA |
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; | |
1da177e4 | 93 | |
b5e89ed5 DA |
94 | if (dev->unique_len || dev->unique) |
95 | return -EBUSY; | |
1da177e4 | 96 | |
b5e89ed5 | 97 | if (copy_from_user(&u, (drm_unique_t __user *) arg, sizeof(u))) |
1da177e4 LT |
98 | return -EFAULT; |
99 | ||
b5e89ed5 DA |
100 | if (!u.unique_len || u.unique_len > 1024) |
101 | return -EINVAL; | |
1da177e4 LT |
102 | |
103 | dev->unique_len = u.unique_len; | |
b5e89ed5 DA |
104 | dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER); |
105 | if (!dev->unique) | |
106 | return -ENOMEM; | |
1da177e4 LT |
107 | if (copy_from_user(dev->unique, u.unique, dev->unique_len)) |
108 | return -EFAULT; | |
109 | ||
110 | dev->unique[dev->unique_len] = '\0'; | |
111 | ||
b5e89ed5 DA |
112 | dev->devname = |
113 | drm_alloc(strlen(dev->driver->pci_driver.name) + | |
114 | strlen(dev->unique) + 2, DRM_MEM_DRIVER); | |
1da177e4 LT |
115 | if (!dev->devname) |
116 | return -ENOMEM; | |
117 | ||
b5e89ed5 DA |
118 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, |
119 | dev->unique); | |
1da177e4 LT |
120 | |
121 | /* Return error if the busid submitted doesn't match the device's actual | |
122 | * busid. | |
123 | */ | |
124 | ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func); | |
125 | if (ret != 3) | |
126 | return DRM_ERR(EINVAL); | |
127 | domain = bus >> 8; | |
128 | bus &= 0xff; | |
b5e89ed5 | 129 | |
33229601 | 130 | if ((domain != drm_get_pci_domain(dev)) || |
242ef0e1 D |
131 | (bus != dev->pdev->bus->number) || |
132 | (slot != PCI_SLOT(dev->pdev->devfn)) || | |
133 | (func != PCI_FUNC(dev->pdev->devfn))) | |
1da177e4 LT |
134 | return -EINVAL; |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
b5e89ed5 | 139 | static int drm_set_busid(drm_device_t * dev) |
1da177e4 | 140 | { |
fe34765b DA |
141 | int len; |
142 | ||
1da177e4 | 143 | if (dev->unique != NULL) |
1f27ce6a | 144 | return 0; |
1da177e4 | 145 | |
fe34765b | 146 | dev->unique_len = 40; |
1da177e4 LT |
147 | dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); |
148 | if (dev->unique == NULL) | |
1f27ce6a | 149 | return -ENOMEM; |
1da177e4 | 150 | |
fe34765b | 151 | len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", |
33229601 | 152 | drm_get_pci_domain(dev), dev->pdev->bus->number, |
242ef0e1 D |
153 | PCI_SLOT(dev->pdev->devfn), |
154 | PCI_FUNC(dev->pdev->devfn)); | |
1da177e4 | 155 | |
fe34765b DA |
156 | if (len > dev->unique_len) |
157 | DRM_ERROR("Unique buffer overflowed\n"); | |
158 | ||
b5e89ed5 DA |
159 | dev->devname = |
160 | drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len + | |
161 | 2, DRM_MEM_DRIVER); | |
1da177e4 | 162 | if (dev->devname == NULL) |
1f27ce6a | 163 | return -ENOMEM; |
1da177e4 | 164 | |
b5e89ed5 DA |
165 | sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, |
166 | dev->unique); | |
1da177e4 LT |
167 | |
168 | return 0; | |
169 | } | |
170 | ||
1da177e4 LT |
171 | /** |
172 | * Get a mapping information. | |
173 | * | |
174 | * \param inode device inode. | |
175 | * \param filp file pointer. | |
176 | * \param cmd command. | |
177 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 178 | * |
1da177e4 LT |
179 | * \return zero on success or a negative number on failure. |
180 | * | |
181 | * Searches for the mapping with the specified offset and copies its information | |
182 | * into userspace | |
183 | */ | |
b5e89ed5 DA |
184 | int drm_getmap(struct inode *inode, struct file *filp, |
185 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 186 | { |
b5e89ed5 DA |
187 | drm_file_t *priv = filp->private_data; |
188 | drm_device_t *dev = priv->head->dev; | |
189 | drm_map_t __user *argp = (void __user *)arg; | |
190 | drm_map_t map; | |
1da177e4 LT |
191 | drm_map_list_t *r_list = NULL; |
192 | struct list_head *list; | |
b5e89ed5 DA |
193 | int idx; |
194 | int i; | |
1da177e4 LT |
195 | |
196 | if (copy_from_user(&map, argp, sizeof(map))) | |
197 | return -EFAULT; | |
198 | idx = map.offset; | |
199 | ||
30e2fb18 | 200 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 201 | if (idx < 0) { |
30e2fb18 | 202 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
203 | return -EINVAL; |
204 | } | |
205 | ||
206 | i = 0; | |
207 | list_for_each(list, &dev->maplist->head) { | |
b5e89ed5 | 208 | if (i == idx) { |
1da177e4 LT |
209 | r_list = list_entry(list, drm_map_list_t, head); |
210 | break; | |
211 | } | |
212 | i++; | |
213 | } | |
b5e89ed5 | 214 | if (!r_list || !r_list->map) { |
30e2fb18 | 215 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
216 | return -EINVAL; |
217 | } | |
218 | ||
219 | map.offset = r_list->map->offset; | |
b5e89ed5 DA |
220 | map.size = r_list->map->size; |
221 | map.type = r_list->map->type; | |
222 | map.flags = r_list->map->flags; | |
223 | map.handle = (void *)(unsigned long)r_list->user_token; | |
224 | map.mtrr = r_list->map->mtrr; | |
30e2fb18 | 225 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 226 | |
b5e89ed5 DA |
227 | if (copy_to_user(argp, &map, sizeof(map))) |
228 | return -EFAULT; | |
1da177e4 LT |
229 | return 0; |
230 | } | |
231 | ||
232 | /** | |
233 | * Get client information. | |
234 | * | |
235 | * \param inode device inode. | |
236 | * \param filp file pointer. | |
237 | * \param cmd command. | |
238 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 239 | * |
1da177e4 LT |
240 | * \return zero on success or a negative number on failure. |
241 | * | |
242 | * Searches for the client with the specified index and copies its information | |
243 | * into userspace | |
244 | */ | |
b5e89ed5 DA |
245 | int drm_getclient(struct inode *inode, struct file *filp, |
246 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 247 | { |
b5e89ed5 DA |
248 | drm_file_t *priv = filp->private_data; |
249 | drm_device_t *dev = priv->head->dev; | |
fe34765b | 250 | drm_client_t __user *argp = (drm_client_t __user *)arg; |
1da177e4 | 251 | drm_client_t client; |
b5e89ed5 DA |
252 | drm_file_t *pt; |
253 | int idx; | |
254 | int i; | |
1da177e4 LT |
255 | |
256 | if (copy_from_user(&client, argp, sizeof(client))) | |
257 | return -EFAULT; | |
258 | idx = client.idx; | |
30e2fb18 | 259 | mutex_lock(&dev->struct_mutex); |
b5e89ed5 | 260 | for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ; |
1da177e4 LT |
261 | |
262 | if (!pt) { | |
30e2fb18 | 263 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
264 | return -EINVAL; |
265 | } | |
b5e89ed5 DA |
266 | client.auth = pt->authenticated; |
267 | client.pid = pt->pid; | |
268 | client.uid = pt->uid; | |
1da177e4 | 269 | client.magic = pt->magic; |
b5e89ed5 | 270 | client.iocs = pt->ioctl_count; |
30e2fb18 | 271 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 272 | |
fe34765b | 273 | if (copy_to_user(argp, &client, sizeof(client))) |
1da177e4 LT |
274 | return -EFAULT; |
275 | return 0; | |
276 | } | |
277 | ||
b5e89ed5 DA |
278 | /** |
279 | * Get statistics information. | |
280 | * | |
1da177e4 LT |
281 | * \param inode device inode. |
282 | * \param filp file pointer. | |
283 | * \param cmd command. | |
284 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 285 | * |
1da177e4 LT |
286 | * \return zero on success or a negative number on failure. |
287 | */ | |
b5e89ed5 DA |
288 | int drm_getstats(struct inode *inode, struct file *filp, |
289 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 290 | { |
b5e89ed5 DA |
291 | drm_file_t *priv = filp->private_data; |
292 | drm_device_t *dev = priv->head->dev; | |
293 | drm_stats_t stats; | |
294 | int i; | |
1da177e4 LT |
295 | |
296 | memset(&stats, 0, sizeof(stats)); | |
b5e89ed5 | 297 | |
30e2fb18 | 298 | mutex_lock(&dev->struct_mutex); |
1da177e4 LT |
299 | |
300 | for (i = 0; i < dev->counters; i++) { | |
301 | if (dev->types[i] == _DRM_STAT_LOCK) | |
302 | stats.data[i].value | |
b5e89ed5 DA |
303 | = (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0); |
304 | else | |
1da177e4 | 305 | stats.data[i].value = atomic_read(&dev->counts[i]); |
b5e89ed5 | 306 | stats.data[i].type = dev->types[i]; |
1da177e4 | 307 | } |
b5e89ed5 | 308 | |
1da177e4 LT |
309 | stats.count = dev->counters; |
310 | ||
30e2fb18 | 311 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 312 | |
b5e89ed5 | 313 | if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats))) |
1da177e4 LT |
314 | return -EFAULT; |
315 | return 0; | |
316 | } | |
317 | ||
318 | /** | |
319 | * Setversion ioctl. | |
320 | * | |
321 | * \param inode device inode. | |
322 | * \param filp file pointer. | |
323 | * \param cmd command. | |
324 | * \param arg user argument, pointing to a drm_lock structure. | |
325 | * \return zero on success or negative number on failure. | |
326 | * | |
327 | * Sets the requested interface version | |
328 | */ | |
329 | int drm_setversion(DRM_IOCTL_ARGS) | |
330 | { | |
331 | DRM_DEVICE; | |
332 | drm_set_version_t sv; | |
333 | drm_set_version_t retv; | |
334 | int if_version; | |
335 | drm_set_version_t __user *argp = (void __user *)data; | |
1f27ce6a | 336 | int ret; |
1da177e4 | 337 | |
3d77461e DA |
338 | if (copy_from_user(&sv, argp, sizeof(sv))) |
339 | return -EFAULT; | |
1da177e4 | 340 | |
1da177e4 LT |
341 | retv.drm_di_major = DRM_IF_MAJOR; |
342 | retv.drm_di_minor = DRM_IF_MINOR; | |
22eae947 DA |
343 | retv.drm_dd_major = dev->driver->major; |
344 | retv.drm_dd_minor = dev->driver->minor; | |
1da177e4 | 345 | |
1f27ce6a | 346 | if (copy_to_user(argp, &retv, sizeof(retv))) |
3d77461e | 347 | return -EFAULT; |
1da177e4 LT |
348 | |
349 | if (sv.drm_di_major != -1) { | |
350 | if (sv.drm_di_major != DRM_IF_MAJOR || | |
351 | sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR) | |
1f27ce6a | 352 | return -EINVAL; |
fe34765b | 353 | if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor); |
3d77461e | 354 | dev->if_version = max(if_version, dev->if_version); |
1da177e4 LT |
355 | if (sv.drm_di_minor >= 1) { |
356 | /* | |
357 | * Version 1.1 includes tying of DRM to specific device | |
358 | */ | |
1f27ce6a DA |
359 | ret = drm_set_busid(dev); |
360 | if (ret) | |
361 | return ret; | |
1da177e4 LT |
362 | } |
363 | } | |
364 | ||
365 | if (sv.drm_dd_major != -1) { | |
22eae947 | 366 | if (sv.drm_dd_major != dev->driver->major || |
b5e89ed5 | 367 | sv.drm_dd_minor < 0 |
22eae947 | 368 | || sv.drm_dd_minor > dev->driver->minor) |
1f27ce6a | 369 | return -EINVAL; |
1da177e4 LT |
370 | |
371 | if (dev->driver->set_version) | |
372 | dev->driver->set_version(dev, &sv); | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /** No-op ioctl. */ | |
378 | int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd, | |
b5e89ed5 | 379 | unsigned long arg) |
1da177e4 LT |
380 | { |
381 | DRM_DEBUG("\n"); | |
382 | return 0; | |
383 | } |