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Commit | Line | Data |
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1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_drv.c |
1da177e4 LT |
3 | * Generic driver template |
4 | * | |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> | |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | * | |
8 | * To use this template, you must at least define the following (samples | |
9 | * given for the MGA driver): | |
10 | * | |
11 | * \code | |
12 | * #define DRIVER_AUTHOR "VA Linux Systems, Inc." | |
13 | * | |
14 | * #define DRIVER_NAME "mga" | |
15 | * #define DRIVER_DESC "Matrox G200/G400" | |
16 | * #define DRIVER_DATE "20001127" | |
17 | * | |
1da177e4 LT |
18 | * #define drm_x mga_##x |
19 | * \endcode | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
24 | * | |
25 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
26 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
27 | * All Rights Reserved. | |
28 | * | |
29 | * Permission is hereby granted, free of charge, to any person obtaining a | |
30 | * copy of this software and associated documentation files (the "Software"), | |
31 | * to deal in the Software without restriction, including without limitation | |
32 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
33 | * and/or sell copies of the Software, and to permit persons to whom the | |
34 | * Software is furnished to do so, subject to the following conditions: | |
35 | * | |
36 | * The above copyright notice and this permission notice (including the next | |
37 | * paragraph) shall be included in all copies or substantial portions of the | |
38 | * Software. | |
39 | * | |
40 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
41 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
42 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
43 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
44 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
45 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
46 | * OTHER DEALINGS IN THE SOFTWARE. | |
47 | */ | |
48 | ||
955b12de | 49 | #include <linux/debugfs.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
2d1a8a48 | 51 | #include <linux/export.h> |
1da177e4 LT |
52 | #include "drmP.h" |
53 | #include "drm_core.h" | |
54 | ||
955b12de | 55 | |
c153f45f EA |
56 | static int drm_version(struct drm_device *dev, void *data, |
57 | struct drm_file *file_priv); | |
c94f7029 | 58 | |
1b2f1489 DA |
59 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ |
60 | [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0} | |
61 | ||
1da177e4 | 62 | /** Ioctl table */ |
c153f45f EA |
63 | static struct drm_ioctl_desc drm_ioctls[] = { |
64 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0), | |
65 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), | |
66 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), | |
67 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), | |
68 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0), | |
69 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0), | |
70 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0), | |
9f35421e | 71 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, 0), |
453a7d46 | 72 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), |
c153f45f EA |
73 | |
74 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
75 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
76 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
453a7d46 | 77 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), |
c153f45f EA |
78 | |
79 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
80 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), | |
81 | ||
82 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
83 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), | |
84 | ||
7c1c2871 DA |
85 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), |
86 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), | |
87 | ||
c153f45f EA |
88 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), |
89 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
90 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
91 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), | |
92 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
93 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
94 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), | |
95 | ||
8f879194 DV |
96 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
97 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
c153f45f EA |
98 | |
99 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), | |
100 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), | |
101 | ||
102 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
103 | ||
104 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
105 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
106 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), | |
107 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), | |
108 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), | |
1da177e4 | 109 | /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ |
c153f45f | 110 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH), |
1da177e4 | 111 | |
c153f45f | 112 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
1da177e4 LT |
113 | |
114 | #if __OS_HAS_AGP | |
c153f45f EA |
115 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
116 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
117 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
118 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), | |
119 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
120 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
121 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
122 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
1da177e4 LT |
123 | #endif |
124 | ||
c153f45f EA |
125 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
126 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
1da177e4 | 127 | |
c153f45f | 128 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0), |
bea5679f | 129 | |
0a3e67a4 JB |
130 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), |
131 | ||
8f879194 | 132 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
673a394b | 133 | |
9a1420d1 DA |
134 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED), |
135 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
136 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
137 | ||
138 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
139 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
140 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
141 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
142 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED), | |
143 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), | |
144 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
145 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
146 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
147 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
148 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
149 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
150 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
151 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
152 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
153 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
154 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
ff72145b DA |
155 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
156 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
157 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
158 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED) | |
1da177e4 LT |
159 | }; |
160 | ||
0515b93c | 161 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) |
1da177e4 LT |
162 | |
163 | /** | |
164 | * Take down the DRM device. | |
165 | * | |
166 | * \param dev DRM device structure. | |
167 | * | |
168 | * Frees every resource in \p dev. | |
169 | * | |
aff138ab | 170 | * \sa drm_device |
1da177e4 | 171 | */ |
84b1fd10 | 172 | int drm_lastclose(struct drm_device * dev) |
1da177e4 | 173 | { |
8fc2fdf4 | 174 | struct drm_vma_entry *vma, *vma_temp; |
1da177e4 LT |
175 | int i; |
176 | ||
b5e89ed5 | 177 | DRM_DEBUG("\n"); |
1da177e4 | 178 | |
22eae947 DA |
179 | if (dev->driver->lastclose) |
180 | dev->driver->lastclose(dev); | |
181 | DRM_DEBUG("driver lastclose completed\n"); | |
1da177e4 | 182 | |
f453ba04 | 183 | if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) |
b5e89ed5 | 184 | drm_irq_uninstall(dev); |
1da177e4 | 185 | |
30e2fb18 | 186 | mutex_lock(&dev->struct_mutex); |
d4e2cbe9 | 187 | |
b5e89ed5 | 188 | /* Clear AGP information */ |
f453ba04 | 189 | if (drm_core_has_AGP(dev) && dev->agp && |
955b12de | 190 | !drm_core_check_feature(dev, DRIVER_MODESET)) { |
55910517 | 191 | struct drm_agp_mem *entry, *tempe; |
1da177e4 | 192 | |
b5e89ed5 DA |
193 | /* Remove AGP resources, but leave dev->agp |
194 | intact until drv_cleanup is called. */ | |
bd1b331f | 195 | list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { |
b5e89ed5 DA |
196 | if (entry->bound) |
197 | drm_unbind_agp(entry->memory); | |
198 | drm_free_agp(entry->memory, entry->pages); | |
9a298b2a | 199 | kfree(entry); |
1da177e4 | 200 | } |
bd1b331f | 201 | INIT_LIST_HEAD(&dev->agp->memory); |
1da177e4 | 202 | |
7ab98401 | 203 | if (dev->agp->acquired) |
b5e89ed5 | 204 | drm_agp_release(dev); |
1da177e4 LT |
205 | |
206 | dev->agp->acquired = 0; | |
b5e89ed5 | 207 | dev->agp->enabled = 0; |
1da177e4 | 208 | } |
f453ba04 DA |
209 | if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg && |
210 | !drm_core_check_feature(dev, DRIVER_MODESET)) { | |
836cf046 DA |
211 | drm_sg_cleanup(dev->sg); |
212 | dev->sg = NULL; | |
213 | } | |
1da177e4 | 214 | |
b5e89ed5 | 215 | /* Clear vma list (only built for debugging) */ |
bd1b331f DA |
216 | list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { |
217 | list_del(&vma->head); | |
9a298b2a | 218 | kfree(vma); |
1da177e4 LT |
219 | } |
220 | ||
b5e89ed5 DA |
221 | if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) { |
222 | for (i = 0; i < dev->queue_count; i++) { | |
9a298b2a EA |
223 | kfree(dev->queuelist[i]); |
224 | dev->queuelist[i] = NULL; | |
1da177e4 | 225 | } |
9a298b2a | 226 | kfree(dev->queuelist); |
1da177e4 LT |
227 | dev->queuelist = NULL; |
228 | } | |
229 | dev->queue_count = 0; | |
230 | ||
f453ba04 DA |
231 | if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && |
232 | !drm_core_check_feature(dev, DRIVER_MODESET)) | |
b5e89ed5 | 233 | drm_dma_takedown(dev); |
1da177e4 | 234 | |
a2c0a97b | 235 | dev->dev_mapping = NULL; |
30e2fb18 | 236 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 237 | |
22eae947 | 238 | DRM_DEBUG("lastclose completed\n"); |
1da177e4 LT |
239 | return 0; |
240 | } | |
241 | ||
1da177e4 | 242 | /** File operations structure */ |
2b8693c0 | 243 | static const struct file_operations drm_stub_fops = { |
1da177e4 | 244 | .owner = THIS_MODULE, |
6038f373 AB |
245 | .open = drm_stub_open, |
246 | .llseek = noop_llseek, | |
1da177e4 LT |
247 | }; |
248 | ||
249 | static int __init drm_core_init(void) | |
250 | { | |
251 | int ret = -ENOMEM; | |
b5e89ed5 | 252 | |
ba4420c2 | 253 | drm_global_init(); |
2c14f28b | 254 | idr_init(&drm_minors_idr); |
b5e89ed5 | 255 | |
1da177e4 LT |
256 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) |
257 | goto err_p1; | |
b5e89ed5 | 258 | |
1da177e4 LT |
259 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); |
260 | if (IS_ERR(drm_class)) { | |
b5e89ed5 | 261 | printk(KERN_ERR "DRM: Error creating drm class.\n"); |
1da177e4 LT |
262 | ret = PTR_ERR(drm_class); |
263 | goto err_p2; | |
264 | } | |
265 | ||
66600221 | 266 | drm_proc_root = proc_mkdir("dri", NULL); |
1da177e4 LT |
267 | if (!drm_proc_root) { |
268 | DRM_ERROR("Cannot create /proc/dri\n"); | |
269 | ret = -1; | |
270 | goto err_p3; | |
271 | } | |
b5e89ed5 | 272 | |
955b12de BG |
273 | drm_debugfs_root = debugfs_create_dir("dri", NULL); |
274 | if (!drm_debugfs_root) { | |
156f5a78 | 275 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); |
955b12de BG |
276 | ret = -1; |
277 | goto err_p3; | |
278 | } | |
279 | ||
b5e89ed5 DA |
280 | DRM_INFO("Initialized %s %d.%d.%d %s\n", |
281 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
1da177e4 | 282 | return 0; |
e8b962b6 JB |
283 | err_p3: |
284 | drm_sysfs_destroy(); | |
285 | err_p2: | |
1da177e4 | 286 | unregister_chrdev(DRM_MAJOR, "drm"); |
2c14f28b DA |
287 | |
288 | idr_destroy(&drm_minors_idr); | |
e8b962b6 | 289 | err_p1: |
1da177e4 LT |
290 | return ret; |
291 | } | |
292 | ||
b5e89ed5 | 293 | static void __exit drm_core_exit(void) |
1da177e4 LT |
294 | { |
295 | remove_proc_entry("dri", NULL); | |
955b12de | 296 | debugfs_remove(drm_debugfs_root); |
e8b962b6 | 297 | drm_sysfs_destroy(); |
1da177e4 LT |
298 | |
299 | unregister_chrdev(DRM_MAJOR, "drm"); | |
300 | ||
ddd3d069 | 301 | idr_remove_all(&drm_minors_idr); |
2c14f28b | 302 | idr_destroy(&drm_minors_idr); |
1da177e4 LT |
303 | } |
304 | ||
b5e89ed5 DA |
305 | module_init(drm_core_init); |
306 | module_exit(drm_core_exit); | |
1da177e4 | 307 | |
156822f7 AS |
308 | /** |
309 | * Copy and IOCTL return string to user space | |
310 | */ | |
140a45fc AS |
311 | static int drm_copy_field(char *buf, size_t *buf_len, const char *value) |
312 | { | |
313 | int len; | |
314 | ||
315 | /* don't overflow userbuf */ | |
316 | len = strlen(value); | |
317 | if (len > *buf_len) | |
318 | len = *buf_len; | |
319 | ||
320 | /* let userspace know exact length of driver value (which could be | |
321 | * larger than the userspace-supplied buffer) */ | |
322 | *buf_len = strlen(value); | |
323 | ||
324 | /* finally, try filling in the userbuf */ | |
325 | if (len && buf) | |
326 | if (copy_to_user(buf, value, len)) | |
327 | return -EFAULT; | |
328 | return 0; | |
329 | } | |
156822f7 | 330 | |
1da177e4 LT |
331 | /** |
332 | * Get version information | |
333 | * | |
334 | * \param inode device inode. | |
335 | * \param filp file pointer. | |
336 | * \param cmd command. | |
337 | * \param arg user argument, pointing to a drm_version structure. | |
338 | * \return zero on success or negative number on failure. | |
339 | * | |
340 | * Fills in the version information in \p arg. | |
341 | */ | |
c153f45f EA |
342 | static int drm_version(struct drm_device *dev, void *data, |
343 | struct drm_file *file_priv) | |
1da177e4 | 344 | { |
c153f45f | 345 | struct drm_version *version = data; |
dad07ca7 | 346 | int err; |
1da177e4 | 347 | |
c153f45f EA |
348 | version->version_major = dev->driver->major; |
349 | version->version_minor = dev->driver->minor; | |
350 | version->version_patchlevel = dev->driver->patchlevel; | |
dad07ca7 AS |
351 | err = drm_copy_field(version->name, &version->name_len, |
352 | dev->driver->name); | |
353 | if (!err) | |
354 | err = drm_copy_field(version->date, &version->date_len, | |
355 | dev->driver->date); | |
356 | if (!err) | |
357 | err = drm_copy_field(version->desc, &version->desc_len, | |
358 | dev->driver->desc); | |
359 | ||
360 | return err; | |
1da177e4 LT |
361 | } |
362 | ||
b5e89ed5 | 363 | /** |
1da177e4 LT |
364 | * Called whenever a process performs an ioctl on /dev/drm. |
365 | * | |
366 | * \param inode device inode. | |
6c340eac | 367 | * \param file_priv DRM file private. |
1da177e4 LT |
368 | * \param cmd command. |
369 | * \param arg user argument. | |
370 | * \return zero on success or negative number on failure. | |
371 | * | |
372 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
373 | * previleges if so required, and dispatches to the respective function. | |
374 | */ | |
ed8b6704 | 375 | long drm_ioctl(struct file *filp, |
b5e89ed5 | 376 | unsigned int cmd, unsigned long arg) |
1da177e4 | 377 | { |
6c340eac | 378 | struct drm_file *file_priv = filp->private_data; |
ed8b6704 | 379 | struct drm_device *dev; |
c153f45f | 380 | struct drm_ioctl_desc *ioctl; |
1da177e4 LT |
381 | drm_ioctl_t *func; |
382 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
383 | int retcode = -EINVAL; | |
955a23eb | 384 | char stack_kdata[128]; |
c153f45f | 385 | char *kdata = NULL; |
1b2f1489 | 386 | unsigned int usize, asize; |
1da177e4 | 387 | |
ed8b6704 | 388 | dev = file_priv->minor->dev; |
b5e89ed5 DA |
389 | atomic_inc(&dev->ioctl_count); |
390 | atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); | |
6c340eac | 391 | ++file_priv->ioctl_count; |
1da177e4 | 392 | |
b5e89ed5 | 393 | DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", |
ba25f9dc | 394 | task_pid_nr(current), cmd, nr, |
2c14f28b | 395 | (long)old_encode_dev(file_priv->minor->device), |
6c340eac | 396 | file_priv->authenticated); |
b5e89ed5 | 397 | |
0515b93c | 398 | if ((nr >= DRM_CORE_IOCTL_COUNT) && |
99da6d86 TH |
399 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) |
400 | goto err_i1; | |
0515b93c | 401 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && |
1b2f1489 DA |
402 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { |
403 | u32 drv_size; | |
1da177e4 | 404 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; |
1b2f1489 DA |
405 | drv_size = _IOC_SIZE(ioctl->cmd_drv); |
406 | usize = asize = _IOC_SIZE(cmd); | |
407 | if (drv_size > asize) | |
408 | asize = drv_size; | |
409 | } | |
858a3685 | 410 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { |
99da6d86 | 411 | ioctl = &drm_ioctls[nr]; |
858a3685 | 412 | cmd = ioctl->cmd; |
1b2f1489 | 413 | usize = asize = _IOC_SIZE(cmd); |
858a3685 | 414 | } else |
1da177e4 | 415 | goto err_i1; |
b5e89ed5 | 416 | |
41ee2ff4 | 417 | /* Do not trust userspace, use our own definition */ |
1da177e4 LT |
418 | func = ioctl->func; |
419 | /* is there a local override? */ | |
420 | if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) | |
421 | func = dev->driver->dma_ioctl; | |
b5e89ed5 DA |
422 | |
423 | if (!func) { | |
424 | DRM_DEBUG("no function\n"); | |
1da177e4 | 425 | retcode = -EINVAL; |
a7a2cc31 | 426 | } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || |
6c340eac | 427 | ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || |
59738d5c JB |
428 | ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) || |
429 | (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) { | |
1da177e4 LT |
430 | retcode = -EACCES; |
431 | } else { | |
c153f45f | 432 | if (cmd & (IOC_IN | IOC_OUT)) { |
1b2f1489 | 433 | if (asize <= sizeof(stack_kdata)) { |
955a23eb EA |
434 | kdata = stack_kdata; |
435 | } else { | |
1b2f1489 | 436 | kdata = kmalloc(asize, GFP_KERNEL); |
955a23eb EA |
437 | if (!kdata) { |
438 | retcode = -ENOMEM; | |
439 | goto err_i1; | |
440 | } | |
9d5b3ffc | 441 | } |
dd2351da RC |
442 | if (asize > usize) |
443 | memset(kdata + usize, 0, asize - usize); | |
c153f45f EA |
444 | } |
445 | ||
446 | if (cmd & IOC_IN) { | |
447 | if (copy_from_user(kdata, (void __user *)arg, | |
1b2f1489 | 448 | usize) != 0) { |
9d5b3ffc | 449 | retcode = -EFAULT; |
c153f45f EA |
450 | goto err_i1; |
451 | } | |
b9f0aee8 | 452 | } else |
1b2f1489 | 453 | memset(kdata, 0, usize); |
b9f0aee8 | 454 | |
ed8b6704 AB |
455 | if (ioctl->flags & DRM_UNLOCKED) |
456 | retcode = func(dev, kdata, file_priv); | |
457 | else { | |
58374713 | 458 | mutex_lock(&drm_global_mutex); |
ed8b6704 | 459 | retcode = func(dev, kdata, file_priv); |
58374713 | 460 | mutex_unlock(&drm_global_mutex); |
ed8b6704 | 461 | } |
c153f45f | 462 | |
9b6fe313 | 463 | if (cmd & IOC_OUT) { |
c153f45f | 464 | if (copy_to_user((void __user *)arg, kdata, |
1b2f1489 | 465 | usize) != 0) |
9d5b3ffc | 466 | retcode = -EFAULT; |
c153f45f | 467 | } |
1da177e4 | 468 | } |
b5e89ed5 DA |
469 | |
470 | err_i1: | |
955a23eb | 471 | if (kdata != stack_kdata) |
c153f45f | 472 | kfree(kdata); |
b5e89ed5 DA |
473 | atomic_dec(&dev->ioctl_count); |
474 | if (retcode) | |
475 | DRM_DEBUG("ret = %x\n", retcode); | |
1da177e4 LT |
476 | return retcode; |
477 | } | |
1da177e4 | 478 | |
b5e89ed5 | 479 | EXPORT_SYMBOL(drm_ioctl); |
da509d7a | 480 | |
f77d390c | 481 | struct drm_local_map *drm_getsarea(struct drm_device *dev) |
da509d7a | 482 | { |
55910517 | 483 | struct drm_map_list *entry; |
da509d7a | 484 | |
6f710105 | 485 | list_for_each_entry(entry, &dev->maplist, head) { |
da509d7a DA |
486 | if (entry->map && entry->map->type == _DRM_SHM && |
487 | (entry->map->flags & _DRM_CONTAINS_LOCK)) { | |
488 | return entry->map; | |
489 | } | |
490 | } | |
491 | return NULL; | |
492 | } | |
493 | EXPORT_SYMBOL(drm_getsarea); |