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1da177e4 LT |
1 | /* |
2 | * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com | |
3 | * | |
4 | * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. | |
5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
6 | * All Rights Reserved. | |
7 | * | |
ec8f112d DH |
8 | * Author Rickard E. (Rik) Faith <faith@valinux.com> |
9 | * Author Gareth Hughes <gareth@valinux.com> | |
10 | * | |
1da177e4 LT |
11 | * Permission is hereby granted, free of charge, to any person obtaining a |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
28 | * OTHER DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
760285e7 DH |
31 | #include <drm/drmP.h> |
32 | #include <drm/drm_core.h> | |
e7b96070 | 33 | #include "drm_legacy.h" |
1da177e4 | 34 | |
760285e7 DH |
35 | #include <linux/pci.h> |
36 | #include <linux/export.h> | |
0dd99f1b AL |
37 | #ifdef CONFIG_X86 |
38 | #include <asm/mtrr.h> | |
39 | #endif | |
1da177e4 | 40 | |
ec8f112d DH |
41 | static int drm_version(struct drm_device *dev, void *data, |
42 | struct drm_file *file_priv); | |
43 | ||
44 | #define DRM_IOCTL_DEF(ioctl, _func, _flags) \ | |
45 | [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl} | |
46 | ||
47 | /** Ioctl table */ | |
48 | static const struct drm_ioctl_desc drm_ioctls[] = { | |
49 | DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
50 | DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), | |
51 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), | |
52 | DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), | |
53 | DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED), | |
54 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED), | |
55 | DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED), | |
56 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
57 | DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0), | |
58 | DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER), | |
59 | ||
60 | DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
61 | DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
62 | DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
63 | DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER), | |
64 | ||
65 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
66 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), | |
67 | ||
e7b96070 DH |
68 | DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
69 | DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH), | |
ec8f112d DH |
70 | |
71 | DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), | |
72 | DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), | |
73 | ||
e7b96070 DH |
74 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY), |
75 | DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
ec8f112d | 76 | DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
e7b96070 DH |
77 | DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH), |
78 | DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
79 | DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
80 | DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH), | |
ec8f112d DH |
81 | |
82 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
83 | DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
84 | ||
85 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), | |
86 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), | |
87 | ||
88 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
89 | ||
90 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
91 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
92 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), | |
93 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), | |
94 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), | |
95 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH), | |
96 | ||
97 | DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
98 | ||
99 | #if __OS_HAS_AGP | |
100 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
101 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
102 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
103 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), | |
104 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
105 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
106 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
107 | DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
108 | #endif | |
109 | ||
110 | DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
111 | DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
112 | ||
113 | DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED), | |
114 | ||
115 | DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), | |
116 | ||
117 | DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
118 | ||
119 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
120 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
121 | DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), | |
122 | ||
123 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
124 | ||
125 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
126 | DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), | |
127 | ||
128 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
129 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
130 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
131 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
132 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
133 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
134 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED), | |
135 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED), | |
136 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
137 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
138 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
139 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
140 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
141 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
142 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
143 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
144 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
145 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
146 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
147 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
148 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
149 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
150 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
151 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
152 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
153 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
154 | DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), | |
155 | }; | |
156 | ||
157 | #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) | |
158 | ||
1da177e4 LT |
159 | /** |
160 | * Get the bus id. | |
b5e89ed5 | 161 | * |
1da177e4 | 162 | * \param inode device inode. |
6c340eac | 163 | * \param file_priv DRM file private. |
1da177e4 LT |
164 | * \param cmd command. |
165 | * \param arg user argument, pointing to a drm_unique structure. | |
166 | * \return zero on success or a negative number on failure. | |
167 | * | |
168 | * Copies the bus id from drm_device::unique into user space. | |
169 | */ | |
c153f45f EA |
170 | int drm_getunique(struct drm_device *dev, void *data, |
171 | struct drm_file *file_priv) | |
1da177e4 | 172 | { |
c153f45f | 173 | struct drm_unique *u = data; |
7c1c2871 | 174 | struct drm_master *master = file_priv->master; |
1da177e4 | 175 | |
7c1c2871 DA |
176 | if (u->unique_len >= master->unique_len) { |
177 | if (copy_to_user(u->unique, master->unique, master->unique_len)) | |
1da177e4 LT |
178 | return -EFAULT; |
179 | } | |
7c1c2871 | 180 | u->unique_len = master->unique_len; |
c153f45f | 181 | |
1da177e4 LT |
182 | return 0; |
183 | } | |
184 | ||
3fb688fd CW |
185 | static void |
186 | drm_unset_busid(struct drm_device *dev, | |
187 | struct drm_master *master) | |
188 | { | |
3fb688fd CW |
189 | kfree(master->unique); |
190 | master->unique = NULL; | |
191 | master->unique_len = 0; | |
192 | master->unique_size = 0; | |
193 | } | |
194 | ||
1da177e4 LT |
195 | /** |
196 | * Set the bus id. | |
b5e89ed5 | 197 | * |
1da177e4 | 198 | * \param inode device inode. |
6c340eac | 199 | * \param file_priv DRM file private. |
1da177e4 LT |
200 | * \param cmd command. |
201 | * \param arg user argument, pointing to a drm_unique structure. | |
202 | * \return zero on success or a negative number on failure. | |
203 | * | |
204 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
205 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
206 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
53bf2a2b DV |
207 | * version 1.1 or greater. Also note that KMS is all version 1.1 and later and |
208 | * UMS was only ever supported on pci devices. | |
1da177e4 | 209 | */ |
c153f45f EA |
210 | int drm_setunique(struct drm_device *dev, void *data, |
211 | struct drm_file *file_priv) | |
1da177e4 | 212 | { |
c153f45f | 213 | struct drm_unique *u = data; |
7c1c2871 | 214 | struct drm_master *master = file_priv->master; |
8410ea3b | 215 | int ret; |
1da177e4 | 216 | |
7c1c2871 | 217 | if (master->unique_len || master->unique) |
b5e89ed5 | 218 | return -EBUSY; |
1da177e4 | 219 | |
c153f45f | 220 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 221 | return -EINVAL; |
1da177e4 | 222 | |
53bf2a2b DV |
223 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
224 | return 0; | |
225 | ||
226 | if (WARN_ON(!dev->pdev)) | |
8410ea3b | 227 | return -EINVAL; |
b5e89ed5 | 228 | |
53bf2a2b | 229 | ret = drm_pci_set_unique(dev, master, u); |
8410ea3b | 230 | if (ret) |
3fb688fd | 231 | goto err; |
1da177e4 LT |
232 | |
233 | return 0; | |
3fb688fd CW |
234 | |
235 | err: | |
236 | drm_unset_busid(dev, master); | |
237 | return ret; | |
1da177e4 LT |
238 | } |
239 | ||
7c1c2871 | 240 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 241 | { |
7c1c2871 | 242 | struct drm_master *master = file_priv->master; |
8410ea3b | 243 | int ret; |
3fb688fd CW |
244 | |
245 | if (master->unique != NULL) | |
246 | drm_unset_busid(dev, master); | |
fe34765b | 247 | |
ca8e2ad7 TR |
248 | if (dev->driver->bus && dev->driver->bus->set_busid) { |
249 | ret = dev->driver->bus->set_busid(dev, master); | |
250 | if (ret) { | |
251 | drm_unset_busid(dev, master); | |
252 | return ret; | |
253 | } | |
254 | } else { | |
255 | if (WARN(dev->unique == NULL, | |
256 | "No drm_bus.set_busid() implementation provided by " | |
257 | "%ps. Use drm_dev_set_unique() to set the unique " | |
258 | "name explicitly.", dev->driver)) | |
259 | return -EINVAL; | |
260 | ||
261 | master->unique = kstrdup(dev->unique, GFP_KERNEL); | |
262 | if (master->unique) | |
263 | master->unique_len = strlen(dev->unique); | |
264 | } | |
265 | ||
1da177e4 LT |
266 | return 0; |
267 | } | |
268 | ||
1da177e4 LT |
269 | /** |
270 | * Get a mapping information. | |
271 | * | |
272 | * \param inode device inode. | |
6c340eac | 273 | * \param file_priv DRM file private. |
1da177e4 LT |
274 | * \param cmd command. |
275 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 276 | * |
1da177e4 LT |
277 | * \return zero on success or a negative number on failure. |
278 | * | |
279 | * Searches for the mapping with the specified offset and copies its information | |
280 | * into userspace | |
281 | */ | |
c153f45f EA |
282 | int drm_getmap(struct drm_device *dev, void *data, |
283 | struct drm_file *file_priv) | |
1da177e4 | 284 | { |
c153f45f | 285 | struct drm_map *map = data; |
55910517 | 286 | struct drm_map_list *r_list = NULL; |
1da177e4 | 287 | struct list_head *list; |
b5e89ed5 DA |
288 | int idx; |
289 | int i; | |
1da177e4 | 290 | |
c153f45f | 291 | idx = map->offset; |
09b4ea47 | 292 | if (idx < 0) |
1da177e4 | 293 | return -EINVAL; |
1da177e4 LT |
294 | |
295 | i = 0; | |
09b4ea47 | 296 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 297 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 298 | if (i == idx) { |
55910517 | 299 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
300 | break; |
301 | } | |
302 | i++; | |
303 | } | |
b5e89ed5 | 304 | if (!r_list || !r_list->map) { |
30e2fb18 | 305 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
306 | return -EINVAL; |
307 | } | |
308 | ||
c153f45f EA |
309 | map->offset = r_list->map->offset; |
310 | map->size = r_list->map->size; | |
311 | map->type = r_list->map->type; | |
312 | map->flags = r_list->map->flags; | |
313 | map->handle = (void *)(unsigned long) r_list->user_token; | |
0dd99f1b AL |
314 | |
315 | #ifdef CONFIG_X86 | |
316 | /* | |
317 | * There appears to be exactly one user of the mtrr index: dritest. | |
318 | * It's easy enough to keep it working on non-PAT systems. | |
319 | */ | |
320 | map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); | |
321 | #else | |
322 | map->mtrr = -1; | |
323 | #endif | |
324 | ||
30e2fb18 | 325 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 326 | |
1da177e4 LT |
327 | return 0; |
328 | } | |
329 | ||
330 | /** | |
331 | * Get client information. | |
332 | * | |
333 | * \param inode device inode. | |
6c340eac | 334 | * \param file_priv DRM file private. |
1da177e4 LT |
335 | * \param cmd command. |
336 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 337 | * |
1da177e4 LT |
338 | * \return zero on success or a negative number on failure. |
339 | * | |
340 | * Searches for the client with the specified index and copies its information | |
341 | * into userspace | |
342 | */ | |
c153f45f EA |
343 | int drm_getclient(struct drm_device *dev, void *data, |
344 | struct drm_file *file_priv) | |
1da177e4 | 345 | { |
c153f45f | 346 | struct drm_client *client = data; |
09b4ea47 | 347 | |
719524df DV |
348 | /* |
349 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools | |
350 | * not breaking completely. Userspace tools stop enumerating one they | |
351 | * get -EINVAL, hence this is the return value we need to hand back for | |
352 | * no clients tracked. | |
353 | * | |
354 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun | |
355 | * attempt to figure out whether they're authenticated or not. Since | |
356 | * that's the only thing they care about, give it to the directly | |
357 | * instead of walking one giant list. | |
358 | */ | |
359 | if (client->idx == 0) { | |
360 | client->auth = file_priv->authenticated; | |
361 | client->pid = pid_vnr(file_priv->pid); | |
362 | client->uid = from_kuid_munged(current_user_ns(), | |
363 | file_priv->uid); | |
364 | client->magic = 0; | |
365 | client->iocs = 0; | |
366 | ||
367 | return 0; | |
368 | } else { | |
369 | return -EINVAL; | |
bd1b331f | 370 | } |
1da177e4 LT |
371 | } |
372 | ||
b5e89ed5 DA |
373 | /** |
374 | * Get statistics information. | |
375 | * | |
1da177e4 | 376 | * \param inode device inode. |
6c340eac | 377 | * \param file_priv DRM file private. |
1da177e4 LT |
378 | * \param cmd command. |
379 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 380 | * |
1da177e4 LT |
381 | * \return zero on success or a negative number on failure. |
382 | */ | |
c153f45f EA |
383 | int drm_getstats(struct drm_device *dev, void *data, |
384 | struct drm_file *file_priv) | |
1da177e4 | 385 | { |
c153f45f | 386 | struct drm_stats *stats = data; |
1da177e4 | 387 | |
d79cdc83 | 388 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 389 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 390 | |
1da177e4 LT |
391 | return 0; |
392 | } | |
393 | ||
9f35421e BS |
394 | /** |
395 | * Get device/driver capabilities | |
396 | */ | |
397 | int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
398 | { | |
399 | struct drm_get_cap *req = data; | |
400 | ||
401 | req->value = 0; | |
e73f88af DA |
402 | switch (req->capability) { |
403 | case DRM_CAP_DUMB_BUFFER: | |
404 | if (dev->driver->dumb_create) | |
405 | req->value = 1; | |
406 | break; | |
51eab416 | 407 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
408 | req->value = 1; |
409 | break; | |
019d96cb DA |
410 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
411 | req->value = dev->mode_config.preferred_depth; | |
412 | break; | |
413 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
414 | req->value = dev->mode_config.prefer_shadow; | |
415 | break; | |
4271a409 DA |
416 | case DRM_CAP_PRIME: |
417 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
418 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
419 | break; | |
c61eef72 ID |
420 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
421 | req->value = drm_timestamp_monotonic; | |
422 | break; | |
62f2104f KP |
423 | case DRM_CAP_ASYNC_PAGE_FLIP: |
424 | req->value = dev->mode_config.async_page_flip; | |
425 | break; | |
8716ed4e AD |
426 | case DRM_CAP_CURSOR_WIDTH: |
427 | if (dev->mode_config.cursor_width) | |
428 | req->value = dev->mode_config.cursor_width; | |
429 | else | |
430 | req->value = 64; | |
431 | break; | |
432 | case DRM_CAP_CURSOR_HEIGHT: | |
433 | if (dev->mode_config.cursor_height) | |
434 | req->value = dev->mode_config.cursor_height; | |
435 | else | |
436 | req->value = 64; | |
437 | break; | |
e73f88af DA |
438 | default: |
439 | return -EINVAL; | |
440 | } | |
9f35421e BS |
441 | return 0; |
442 | } | |
443 | ||
1c0814fe DL |
444 | /** |
445 | * Set device/driver capabilities | |
446 | */ | |
447 | int | |
448 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
449 | { | |
61d8e328 DL |
450 | struct drm_set_client_cap *req = data; |
451 | ||
452 | switch (req->capability) { | |
453 | case DRM_CLIENT_CAP_STEREO_3D: | |
454 | if (req->value > 1) | |
455 | return -EINVAL; | |
456 | file_priv->stereo_allowed = req->value; | |
457 | break; | |
681e7ec7 | 458 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
681e7ec7 MR |
459 | if (req->value > 1) |
460 | return -EINVAL; | |
461 | file_priv->universal_planes = req->value; | |
462 | break; | |
61d8e328 DL |
463 | default: |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | return 0; | |
1c0814fe DL |
468 | } |
469 | ||
1da177e4 LT |
470 | /** |
471 | * Setversion ioctl. | |
472 | * | |
473 | * \param inode device inode. | |
6c340eac | 474 | * \param file_priv DRM file private. |
1da177e4 LT |
475 | * \param cmd command. |
476 | * \param arg user argument, pointing to a drm_lock structure. | |
477 | * \return zero on success or negative number on failure. | |
478 | * | |
479 | * Sets the requested interface version | |
480 | */ | |
c153f45f | 481 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 482 | { |
c153f45f EA |
483 | struct drm_set_version *sv = data; |
484 | int if_version, retcode = 0; | |
485 | ||
486 | if (sv->drm_di_major != -1) { | |
487 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
488 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
489 | retcode = -EINVAL; | |
490 | goto done; | |
491 | } | |
492 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
493 | sv->drm_di_minor); | |
3d77461e | 494 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 495 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
496 | /* |
497 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 498 | * Version 1.4 has proper PCI domain support |
1da177e4 | 499 | */ |
3fb688fd CW |
500 | retcode = drm_set_busid(dev, file_priv); |
501 | if (retcode) | |
502 | goto done; | |
1da177e4 LT |
503 | } |
504 | } | |
505 | ||
c153f45f EA |
506 | if (sv->drm_dd_major != -1) { |
507 | if (sv->drm_dd_major != dev->driver->major || | |
508 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
509 | dev->driver->minor) { | |
510 | retcode = -EINVAL; | |
511 | goto done; | |
512 | } | |
1da177e4 | 513 | } |
c153f45f EA |
514 | |
515 | done: | |
516 | sv->drm_di_major = DRM_IF_MAJOR; | |
517 | sv->drm_di_minor = DRM_IF_MINOR; | |
518 | sv->drm_dd_major = dev->driver->major; | |
519 | sv->drm_dd_minor = dev->driver->minor; | |
520 | ||
521 | return retcode; | |
1da177e4 LT |
522 | } |
523 | ||
524 | /** No-op ioctl. */ | |
c153f45f EA |
525 | int drm_noop(struct drm_device *dev, void *data, |
526 | struct drm_file *file_priv) | |
1da177e4 LT |
527 | { |
528 | DRM_DEBUG("\n"); | |
529 | return 0; | |
530 | } | |
b2c606fe | 531 | EXPORT_SYMBOL(drm_noop); |
ec8f112d DH |
532 | |
533 | /** | |
534 | * Copy and IOCTL return string to user space | |
535 | */ | |
536 | static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) | |
537 | { | |
538 | int len; | |
539 | ||
540 | /* don't overflow userbuf */ | |
541 | len = strlen(value); | |
542 | if (len > *buf_len) | |
543 | len = *buf_len; | |
544 | ||
545 | /* let userspace know exact length of driver value (which could be | |
546 | * larger than the userspace-supplied buffer) */ | |
547 | *buf_len = strlen(value); | |
548 | ||
549 | /* finally, try filling in the userbuf */ | |
550 | if (len && buf) | |
551 | if (copy_to_user(buf, value, len)) | |
552 | return -EFAULT; | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /** | |
557 | * Get version information | |
558 | * | |
559 | * \param inode device inode. | |
560 | * \param filp file pointer. | |
561 | * \param cmd command. | |
562 | * \param arg user argument, pointing to a drm_version structure. | |
563 | * \return zero on success or negative number on failure. | |
564 | * | |
565 | * Fills in the version information in \p arg. | |
566 | */ | |
567 | static int drm_version(struct drm_device *dev, void *data, | |
568 | struct drm_file *file_priv) | |
569 | { | |
570 | struct drm_version *version = data; | |
571 | int err; | |
572 | ||
573 | version->version_major = dev->driver->major; | |
574 | version->version_minor = dev->driver->minor; | |
575 | version->version_patchlevel = dev->driver->patchlevel; | |
576 | err = drm_copy_field(version->name, &version->name_len, | |
577 | dev->driver->name); | |
578 | if (!err) | |
579 | err = drm_copy_field(version->date, &version->date_len, | |
580 | dev->driver->date); | |
581 | if (!err) | |
582 | err = drm_copy_field(version->desc, &version->desc_len, | |
583 | dev->driver->desc); | |
584 | ||
585 | return err; | |
586 | } | |
587 | ||
588 | /** | |
589 | * drm_ioctl_permit - Check ioctl permissions against caller | |
590 | * | |
591 | * @flags: ioctl permission flags. | |
592 | * @file_priv: Pointer to struct drm_file identifying the caller. | |
593 | * | |
594 | * Checks whether the caller is allowed to run an ioctl with the | |
595 | * indicated permissions. If so, returns zero. Otherwise returns an | |
596 | * error code suitable for ioctl return. | |
597 | */ | |
598 | static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) | |
599 | { | |
600 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ | |
601 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) | |
602 | return -EACCES; | |
603 | ||
604 | /* AUTH is only for authenticated or render client */ | |
605 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && | |
606 | !file_priv->authenticated)) | |
607 | return -EACCES; | |
608 | ||
609 | /* MASTER is only for master or control clients */ | |
7963e9db | 610 | if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && |
ec8f112d DH |
611 | !drm_is_control_client(file_priv))) |
612 | return -EACCES; | |
613 | ||
614 | /* Control clients must be explicitly allowed */ | |
615 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && | |
616 | drm_is_control_client(file_priv))) | |
617 | return -EACCES; | |
618 | ||
619 | /* Render clients must be explicitly allowed */ | |
620 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && | |
621 | drm_is_render_client(file_priv))) | |
622 | return -EACCES; | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | /** | |
628 | * Called whenever a process performs an ioctl on /dev/drm. | |
629 | * | |
630 | * \param inode device inode. | |
631 | * \param file_priv DRM file private. | |
632 | * \param cmd command. | |
633 | * \param arg user argument. | |
634 | * \return zero on success or negative number on failure. | |
635 | * | |
636 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
637 | * previleges if so required, and dispatches to the respective function. | |
638 | */ | |
639 | long drm_ioctl(struct file *filp, | |
640 | unsigned int cmd, unsigned long arg) | |
641 | { | |
642 | struct drm_file *file_priv = filp->private_data; | |
643 | struct drm_device *dev; | |
644 | const struct drm_ioctl_desc *ioctl = NULL; | |
645 | drm_ioctl_t *func; | |
646 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
647 | int retcode = -EINVAL; | |
648 | char stack_kdata[128]; | |
649 | char *kdata = NULL; | |
650 | unsigned int usize, asize; | |
651 | ||
652 | dev = file_priv->minor->dev; | |
653 | ||
654 | if (drm_device_is_unplugged(dev)) | |
655 | return -ENODEV; | |
656 | ||
657 | if ((nr >= DRM_CORE_IOCTL_COUNT) && | |
658 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) | |
659 | goto err_i1; | |
660 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && | |
661 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { | |
662 | u32 drv_size; | |
663 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; | |
664 | drv_size = _IOC_SIZE(ioctl->cmd_drv); | |
665 | usize = asize = _IOC_SIZE(cmd); | |
666 | if (drv_size > asize) | |
667 | asize = drv_size; | |
668 | cmd = ioctl->cmd_drv; | |
669 | } | |
670 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { | |
671 | u32 drv_size; | |
672 | ||
673 | ioctl = &drm_ioctls[nr]; | |
674 | ||
675 | drv_size = _IOC_SIZE(ioctl->cmd); | |
676 | usize = asize = _IOC_SIZE(cmd); | |
677 | if (drv_size > asize) | |
678 | asize = drv_size; | |
679 | ||
680 | cmd = ioctl->cmd; | |
681 | } else | |
682 | goto err_i1; | |
683 | ||
684 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", | |
685 | task_pid_nr(current), | |
686 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
687 | file_priv->authenticated, ioctl->name); | |
688 | ||
689 | /* Do not trust userspace, use our own definition */ | |
690 | func = ioctl->func; | |
691 | ||
692 | if (unlikely(!func)) { | |
693 | DRM_DEBUG("no function\n"); | |
694 | retcode = -EINVAL; | |
695 | goto err_i1; | |
696 | } | |
697 | ||
698 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); | |
699 | if (unlikely(retcode)) | |
700 | goto err_i1; | |
701 | ||
702 | if (cmd & (IOC_IN | IOC_OUT)) { | |
703 | if (asize <= sizeof(stack_kdata)) { | |
704 | kdata = stack_kdata; | |
705 | } else { | |
706 | kdata = kmalloc(asize, GFP_KERNEL); | |
707 | if (!kdata) { | |
708 | retcode = -ENOMEM; | |
709 | goto err_i1; | |
710 | } | |
711 | } | |
712 | if (asize > usize) | |
713 | memset(kdata + usize, 0, asize - usize); | |
714 | } | |
715 | ||
716 | if (cmd & IOC_IN) { | |
717 | if (copy_from_user(kdata, (void __user *)arg, | |
718 | usize) != 0) { | |
719 | retcode = -EFAULT; | |
720 | goto err_i1; | |
721 | } | |
722 | } else if (cmd & IOC_OUT) { | |
723 | memset(kdata, 0, usize); | |
724 | } | |
725 | ||
726 | if (ioctl->flags & DRM_UNLOCKED) | |
727 | retcode = func(dev, kdata, file_priv); | |
728 | else { | |
729 | mutex_lock(&drm_global_mutex); | |
730 | retcode = func(dev, kdata, file_priv); | |
731 | mutex_unlock(&drm_global_mutex); | |
732 | } | |
733 | ||
734 | if (cmd & IOC_OUT) { | |
735 | if (copy_to_user((void __user *)arg, kdata, | |
736 | usize) != 0) | |
737 | retcode = -EFAULT; | |
738 | } | |
739 | ||
740 | err_i1: | |
741 | if (!ioctl) | |
742 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", | |
743 | task_pid_nr(current), | |
744 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
745 | file_priv->authenticated, cmd, nr); | |
746 | ||
747 | if (kdata != stack_kdata) | |
748 | kfree(kdata); | |
749 | if (retcode) | |
750 | DRM_DEBUG("ret = %d\n", retcode); | |
751 | return retcode; | |
752 | } | |
753 | EXPORT_SYMBOL(drm_ioctl); | |
754 | ||
755 | /** | |
756 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags | |
757 | * | |
758 | * @nr: Ioctl number. | |
759 | * @flags: Where to return the ioctl permission flags | |
760 | */ | |
761 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) | |
762 | { | |
763 | if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || | |
764 | (nr < DRM_COMMAND_BASE)) { | |
765 | *flags = drm_ioctls[nr].flags; | |
766 | return true; | |
767 | } | |
768 | ||
769 | return false; | |
770 | } | |
771 | EXPORT_SYMBOL(drm_ioctl_flags); |