Commit | Line | Data |
---|---|---|
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> |
760285e7 DH |
52 | #include <drm/drmP.h> |
53 | #include <drm/drm_core.h> | |
1da177e4 | 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 | 59 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ |
b9434d0f | 60 | [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl} |
1b2f1489 | 61 | |
1da177e4 | 62 | /** Ioctl table */ |
7d05336b | 63 | static const struct drm_ioctl_desc drm_ioctls[] = { |
3d3b78c0 | 64 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
c153f45f EA |
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), | |
09b4ea47 IH |
68 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), |
69 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), | |
70 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), | |
1793126f | 71 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
1c0814fe | 72 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), |
453a7d46 | 73 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), |
c153f45f EA |
74 | |
75 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
76 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
77 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
453a7d46 | 78 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), |
c153f45f EA |
79 | |
80 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
81 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), | |
82 | ||
83 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
84 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), | |
85 | ||
7c1c2871 DA |
86 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), |
87 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), | |
88 | ||
c153f45f EA |
89 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), |
90 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
492d774d | 91 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
c153f45f EA |
92 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), |
93 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
94 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
95 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), | |
96 | ||
8f879194 DV |
97 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
98 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
c153f45f EA |
99 | |
100 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), | |
101 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), | |
102 | ||
103 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
104 | ||
105 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
106 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
107 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), | |
108 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), | |
109 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), | |
6eb9278a | 110 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, 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 | ||
1d8d29cf | 125 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
c153f45f | 126 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
1da177e4 | 127 | |
8f4ff2b0 | 128 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), |
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 | |
1793126f | 134 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), |
9a1420d1 DA |
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 | ||
a14b1b42 | 138 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
3248877e | 139 | |
1793126f DH |
140 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), |
141 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
3248877e | 142 | |
2216c9e7 | 143 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
a14b1b42 | 144 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
9a1420d1 | 145 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
2216c9e7 | 146 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
8cf5c917 | 147 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
9a1420d1 | 148 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
a14b1b42 | 149 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), |
9a1420d1 | 150 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), |
a14b1b42 MSB |
151 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
152 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
c55b6b3d VS |
153 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
154 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
2216c9e7 | 155 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
9a1420d1 | 156 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
2216c9e7 | 157 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
a14b1b42 | 158 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
fb30edf5 DH |
159 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
160 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
161 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
9a1420d1 | 162 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
ff72145b | 163 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
fb30edf5 DH |
164 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
165 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
166 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
2216c9e7 | 167 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
c543188a | 168 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
4c813d4d | 169 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), |
1da177e4 LT |
170 | }; |
171 | ||
0515b93c | 172 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) |
1da177e4 | 173 | |
1da177e4 | 174 | /** File operations structure */ |
2b8693c0 | 175 | static const struct file_operations drm_stub_fops = { |
1da177e4 | 176 | .owner = THIS_MODULE, |
6038f373 AB |
177 | .open = drm_stub_open, |
178 | .llseek = noop_llseek, | |
1da177e4 LT |
179 | }; |
180 | ||
181 | static int __init drm_core_init(void) | |
182 | { | |
183 | int ret = -ENOMEM; | |
b5e89ed5 | 184 | |
ba4420c2 | 185 | drm_global_init(); |
b21e3afe | 186 | drm_connector_ida_init(); |
2c14f28b | 187 | idr_init(&drm_minors_idr); |
b5e89ed5 | 188 | |
1da177e4 LT |
189 | if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) |
190 | goto err_p1; | |
b5e89ed5 | 191 | |
1da177e4 LT |
192 | drm_class = drm_sysfs_create(THIS_MODULE, "drm"); |
193 | if (IS_ERR(drm_class)) { | |
b5e89ed5 | 194 | printk(KERN_ERR "DRM: Error creating drm class.\n"); |
1da177e4 LT |
195 | ret = PTR_ERR(drm_class); |
196 | goto err_p2; | |
197 | } | |
198 | ||
955b12de BG |
199 | drm_debugfs_root = debugfs_create_dir("dri", NULL); |
200 | if (!drm_debugfs_root) { | |
156f5a78 | 201 | DRM_ERROR("Cannot create /sys/kernel/debug/dri\n"); |
955b12de BG |
202 | ret = -1; |
203 | goto err_p3; | |
204 | } | |
205 | ||
b5e89ed5 DA |
206 | DRM_INFO("Initialized %s %d.%d.%d %s\n", |
207 | CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
1da177e4 | 208 | return 0; |
e8b962b6 JB |
209 | err_p3: |
210 | drm_sysfs_destroy(); | |
211 | err_p2: | |
1da177e4 | 212 | unregister_chrdev(DRM_MAJOR, "drm"); |
2c14f28b DA |
213 | |
214 | idr_destroy(&drm_minors_idr); | |
e8b962b6 | 215 | err_p1: |
1da177e4 LT |
216 | return ret; |
217 | } | |
218 | ||
b5e89ed5 | 219 | static void __exit drm_core_exit(void) |
1da177e4 | 220 | { |
955b12de | 221 | debugfs_remove(drm_debugfs_root); |
e8b962b6 | 222 | drm_sysfs_destroy(); |
1da177e4 LT |
223 | |
224 | unregister_chrdev(DRM_MAJOR, "drm"); | |
225 | ||
b21e3afe | 226 | drm_connector_ida_destroy(); |
2c14f28b | 227 | idr_destroy(&drm_minors_idr); |
1da177e4 LT |
228 | } |
229 | ||
b5e89ed5 DA |
230 | module_init(drm_core_init); |
231 | module_exit(drm_core_exit); | |
1da177e4 | 232 | |
156822f7 AS |
233 | /** |
234 | * Copy and IOCTL return string to user space | |
235 | */ | |
140a45fc AS |
236 | static int drm_copy_field(char *buf, size_t *buf_len, const char *value) |
237 | { | |
238 | int len; | |
239 | ||
240 | /* don't overflow userbuf */ | |
241 | len = strlen(value); | |
242 | if (len > *buf_len) | |
243 | len = *buf_len; | |
244 | ||
245 | /* let userspace know exact length of driver value (which could be | |
246 | * larger than the userspace-supplied buffer) */ | |
247 | *buf_len = strlen(value); | |
248 | ||
249 | /* finally, try filling in the userbuf */ | |
250 | if (len && buf) | |
251 | if (copy_to_user(buf, value, len)) | |
252 | return -EFAULT; | |
253 | return 0; | |
254 | } | |
156822f7 | 255 | |
1da177e4 LT |
256 | /** |
257 | * Get version information | |
258 | * | |
259 | * \param inode device inode. | |
260 | * \param filp file pointer. | |
261 | * \param cmd command. | |
262 | * \param arg user argument, pointing to a drm_version structure. | |
263 | * \return zero on success or negative number on failure. | |
264 | * | |
265 | * Fills in the version information in \p arg. | |
266 | */ | |
c153f45f EA |
267 | static int drm_version(struct drm_device *dev, void *data, |
268 | struct drm_file *file_priv) | |
1da177e4 | 269 | { |
c153f45f | 270 | struct drm_version *version = data; |
dad07ca7 | 271 | int err; |
1da177e4 | 272 | |
c153f45f EA |
273 | version->version_major = dev->driver->major; |
274 | version->version_minor = dev->driver->minor; | |
275 | version->version_patchlevel = dev->driver->patchlevel; | |
dad07ca7 AS |
276 | err = drm_copy_field(version->name, &version->name_len, |
277 | dev->driver->name); | |
278 | if (!err) | |
279 | err = drm_copy_field(version->date, &version->date_len, | |
280 | dev->driver->date); | |
281 | if (!err) | |
282 | err = drm_copy_field(version->desc, &version->desc_len, | |
283 | dev->driver->desc); | |
284 | ||
285 | return err; | |
1da177e4 LT |
286 | } |
287 | ||
c2667355 TH |
288 | /** |
289 | * drm_ioctl_permit - Check ioctl permissions against caller | |
290 | * | |
291 | * @flags: ioctl permission flags. | |
292 | * @file_priv: Pointer to struct drm_file identifying the caller. | |
293 | * | |
294 | * Checks whether the caller is allowed to run an ioctl with the | |
295 | * indicated permissions. If so, returns zero. Otherwise returns an | |
296 | * error code suitable for ioctl return. | |
297 | */ | |
298 | static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) | |
299 | { | |
300 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ | |
301 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) | |
302 | return -EACCES; | |
303 | ||
304 | /* AUTH is only for authenticated or render client */ | |
305 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && | |
306 | !file_priv->authenticated)) | |
307 | return -EACCES; | |
308 | ||
ac05dbc5 TH |
309 | /* MASTER is only for master or control clients */ |
310 | if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && | |
311 | !drm_is_control_client(file_priv))) | |
c2667355 TH |
312 | return -EACCES; |
313 | ||
314 | /* Control clients must be explicitly allowed */ | |
315 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && | |
ac05dbc5 | 316 | drm_is_control_client(file_priv))) |
c2667355 TH |
317 | return -EACCES; |
318 | ||
319 | /* Render clients must be explicitly allowed */ | |
320 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && | |
321 | drm_is_render_client(file_priv))) | |
322 | return -EACCES; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
b5e89ed5 | 327 | /** |
1da177e4 LT |
328 | * Called whenever a process performs an ioctl on /dev/drm. |
329 | * | |
330 | * \param inode device inode. | |
6c340eac | 331 | * \param file_priv DRM file private. |
1da177e4 LT |
332 | * \param cmd command. |
333 | * \param arg user argument. | |
334 | * \return zero on success or negative number on failure. | |
335 | * | |
336 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
337 | * previleges if so required, and dispatches to the respective function. | |
338 | */ | |
ed8b6704 | 339 | long drm_ioctl(struct file *filp, |
b5e89ed5 | 340 | unsigned int cmd, unsigned long arg) |
1da177e4 | 341 | { |
6c340eac | 342 | struct drm_file *file_priv = filp->private_data; |
ed8b6704 | 343 | struct drm_device *dev; |
b9434d0f | 344 | const struct drm_ioctl_desc *ioctl = NULL; |
1da177e4 LT |
345 | drm_ioctl_t *func; |
346 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
347 | int retcode = -EINVAL; | |
955a23eb | 348 | char stack_kdata[128]; |
c153f45f | 349 | char *kdata = NULL; |
1b2f1489 | 350 | unsigned int usize, asize; |
1da177e4 | 351 | |
ed8b6704 | 352 | dev = file_priv->minor->dev; |
2c07a21d DA |
353 | |
354 | if (drm_device_is_unplugged(dev)) | |
355 | return -ENODEV; | |
356 | ||
0515b93c | 357 | if ((nr >= DRM_CORE_IOCTL_COUNT) && |
99da6d86 TH |
358 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) |
359 | goto err_i1; | |
0515b93c | 360 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && |
1b2f1489 DA |
361 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { |
362 | u32 drv_size; | |
1da177e4 | 363 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; |
1b2f1489 DA |
364 | drv_size = _IOC_SIZE(ioctl->cmd_drv); |
365 | usize = asize = _IOC_SIZE(cmd); | |
366 | if (drv_size > asize) | |
367 | asize = drv_size; | |
e4fda9f2 | 368 | cmd = ioctl->cmd_drv; |
1b2f1489 | 369 | } |
858a3685 | 370 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { |
b062672e CW |
371 | u32 drv_size; |
372 | ||
99da6d86 | 373 | ioctl = &drm_ioctls[nr]; |
b062672e CW |
374 | |
375 | drv_size = _IOC_SIZE(ioctl->cmd); | |
1b2f1489 | 376 | usize = asize = _IOC_SIZE(cmd); |
b062672e CW |
377 | if (drv_size > asize) |
378 | asize = drv_size; | |
379 | ||
380 | cmd = ioctl->cmd; | |
858a3685 | 381 | } else |
1da177e4 | 382 | goto err_i1; |
b5e89ed5 | 383 | |
b9434d0f CC |
384 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", |
385 | task_pid_nr(current), | |
5817878c | 386 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
b9434d0f CC |
387 | file_priv->authenticated, ioctl->name); |
388 | ||
41ee2ff4 | 389 | /* Do not trust userspace, use our own definition */ |
1da177e4 | 390 | func = ioctl->func; |
b5e89ed5 | 391 | |
c2667355 | 392 | if (unlikely(!func)) { |
b5e89ed5 | 393 | DRM_DEBUG("no function\n"); |
1da177e4 | 394 | retcode = -EINVAL; |
c2667355 TH |
395 | goto err_i1; |
396 | } | |
c153f45f | 397 | |
c2667355 TH |
398 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); |
399 | if (unlikely(retcode)) | |
400 | goto err_i1; | |
401 | ||
402 | if (cmd & (IOC_IN | IOC_OUT)) { | |
403 | if (asize <= sizeof(stack_kdata)) { | |
404 | kdata = stack_kdata; | |
405 | } else { | |
406 | kdata = kmalloc(asize, GFP_KERNEL); | |
407 | if (!kdata) { | |
408 | retcode = -ENOMEM; | |
c153f45f EA |
409 | goto err_i1; |
410 | } | |
ed8b6704 | 411 | } |
c2667355 TH |
412 | if (asize > usize) |
413 | memset(kdata + usize, 0, asize - usize); | |
414 | } | |
c153f45f | 415 | |
c2667355 TH |
416 | if (cmd & IOC_IN) { |
417 | if (copy_from_user(kdata, (void __user *)arg, | |
418 | usize) != 0) { | |
419 | retcode = -EFAULT; | |
420 | goto err_i1; | |
c153f45f | 421 | } |
1539fb9b | 422 | } else if (cmd & IOC_OUT) { |
c2667355 | 423 | memset(kdata, 0, usize); |
1539fb9b | 424 | } |
c2667355 TH |
425 | |
426 | if (ioctl->flags & DRM_UNLOCKED) | |
427 | retcode = func(dev, kdata, file_priv); | |
428 | else { | |
429 | mutex_lock(&drm_global_mutex); | |
430 | retcode = func(dev, kdata, file_priv); | |
431 | mutex_unlock(&drm_global_mutex); | |
432 | } | |
433 | ||
434 | if (cmd & IOC_OUT) { | |
435 | if (copy_to_user((void __user *)arg, kdata, | |
436 | usize) != 0) | |
437 | retcode = -EFAULT; | |
1da177e4 | 438 | } |
b5e89ed5 DA |
439 | |
440 | err_i1: | |
b9434d0f | 441 | if (!ioctl) |
f28c38ae | 442 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", |
b9434d0f | 443 | task_pid_nr(current), |
5817878c | 444 | (long)old_encode_dev(file_priv->minor->kdev->devt), |
b9434d0f CC |
445 | file_priv->authenticated, cmd, nr); |
446 | ||
955a23eb | 447 | if (kdata != stack_kdata) |
c153f45f | 448 | kfree(kdata); |
b5e89ed5 | 449 | if (retcode) |
4ef7fe7c | 450 | DRM_DEBUG("ret = %d\n", retcode); |
1da177e4 LT |
451 | return retcode; |
452 | } | |
b5e89ed5 | 453 | EXPORT_SYMBOL(drm_ioctl); |
4beb6d9f TH |
454 | |
455 | /** | |
456 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags | |
457 | * | |
458 | * @nr: Ioctl number. | |
459 | * @flags: Where to return the ioctl permission flags | |
460 | */ | |
461 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) | |
462 | { | |
463 | if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || | |
464 | (nr < DRM_COMMAND_BASE)) { | |
465 | *flags = drm_ioctls[nr].flags; | |
466 | return true; | |
467 | } | |
468 | ||
469 | return false; | |
470 | } | |
471 | EXPORT_SYMBOL(drm_ioctl_flags); |