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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 | ||
9fc5cde7 DH |
65 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
66 | DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH), | |
ec8f112d | 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 | ||
bb6d822e DH |
85 | DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH), |
86 | DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH), | |
ec8f112d DH |
87 | |
88 | DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), | |
89 | ||
9fc5cde7 DH |
90 | DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), |
91 | DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), | |
92 | DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH), | |
93 | DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH), | |
94 | DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH), | |
95 | DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH), | |
ec8f112d DH |
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; | |
3fb688fd CW |
192 | } |
193 | ||
1da177e4 LT |
194 | /** |
195 | * Set the bus id. | |
b5e89ed5 | 196 | * |
1da177e4 | 197 | * \param inode device inode. |
6c340eac | 198 | * \param file_priv DRM file private. |
1da177e4 LT |
199 | * \param cmd command. |
200 | * \param arg user argument, pointing to a drm_unique structure. | |
201 | * \return zero on success or a negative number on failure. | |
202 | * | |
203 | * Copies the bus id from userspace into drm_device::unique, and verifies that | |
204 | * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated | |
205 | * in interface version 1.1 and will return EBUSY when setversion has requested | |
53bf2a2b DV |
206 | * version 1.1 or greater. Also note that KMS is all version 1.1 and later and |
207 | * UMS was only ever supported on pci devices. | |
1da177e4 | 208 | */ |
c153f45f EA |
209 | int drm_setunique(struct drm_device *dev, void *data, |
210 | struct drm_file *file_priv) | |
1da177e4 | 211 | { |
c153f45f | 212 | struct drm_unique *u = data; |
7c1c2871 | 213 | struct drm_master *master = file_priv->master; |
8410ea3b | 214 | int ret; |
1da177e4 | 215 | |
7c1c2871 | 216 | if (master->unique_len || master->unique) |
b5e89ed5 | 217 | return -EBUSY; |
1da177e4 | 218 | |
c153f45f | 219 | if (!u->unique_len || u->unique_len > 1024) |
b5e89ed5 | 220 | return -EINVAL; |
1da177e4 | 221 | |
53bf2a2b DV |
222 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
223 | return 0; | |
224 | ||
225 | if (WARN_ON(!dev->pdev)) | |
8410ea3b | 226 | return -EINVAL; |
b5e89ed5 | 227 | |
53bf2a2b | 228 | ret = drm_pci_set_unique(dev, master, u); |
8410ea3b | 229 | if (ret) |
3fb688fd | 230 | goto err; |
1da177e4 LT |
231 | |
232 | return 0; | |
3fb688fd CW |
233 | |
234 | err: | |
235 | drm_unset_busid(dev, master); | |
236 | return ret; | |
1da177e4 LT |
237 | } |
238 | ||
7c1c2871 | 239 | static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv) |
1da177e4 | 240 | { |
7c1c2871 | 241 | struct drm_master *master = file_priv->master; |
8410ea3b | 242 | int ret; |
3fb688fd CW |
243 | |
244 | if (master->unique != NULL) | |
245 | drm_unset_busid(dev, master); | |
fe34765b | 246 | |
915b4d11 DH |
247 | if (dev->driver->set_busid) { |
248 | ret = dev->driver->set_busid(dev, master); | |
249 | if (ret) { | |
250 | drm_unset_busid(dev, master); | |
251 | return ret; | |
252 | } | |
ca8e2ad7 TR |
253 | } else { |
254 | if (WARN(dev->unique == NULL, | |
c5786fe5 | 255 | "No drm_driver.set_busid() implementation provided by " |
ca8e2ad7 TR |
256 | "%ps. Use drm_dev_set_unique() to set the unique " |
257 | "name explicitly.", dev->driver)) | |
258 | return -EINVAL; | |
259 | ||
260 | master->unique = kstrdup(dev->unique, GFP_KERNEL); | |
261 | if (master->unique) | |
262 | master->unique_len = strlen(dev->unique); | |
263 | } | |
264 | ||
1da177e4 LT |
265 | return 0; |
266 | } | |
267 | ||
1da177e4 LT |
268 | /** |
269 | * Get a mapping information. | |
270 | * | |
271 | * \param inode device inode. | |
6c340eac | 272 | * \param file_priv DRM file private. |
1da177e4 LT |
273 | * \param cmd command. |
274 | * \param arg user argument, pointing to a drm_map structure. | |
b5e89ed5 | 275 | * |
1da177e4 LT |
276 | * \return zero on success or a negative number on failure. |
277 | * | |
278 | * Searches for the mapping with the specified offset and copies its information | |
279 | * into userspace | |
280 | */ | |
c153f45f EA |
281 | int drm_getmap(struct drm_device *dev, void *data, |
282 | struct drm_file *file_priv) | |
1da177e4 | 283 | { |
c153f45f | 284 | struct drm_map *map = data; |
55910517 | 285 | struct drm_map_list *r_list = NULL; |
1da177e4 | 286 | struct list_head *list; |
b5e89ed5 DA |
287 | int idx; |
288 | int i; | |
1da177e4 | 289 | |
c153f45f | 290 | idx = map->offset; |
09b4ea47 | 291 | if (idx < 0) |
1da177e4 | 292 | return -EINVAL; |
1da177e4 LT |
293 | |
294 | i = 0; | |
09b4ea47 | 295 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 296 | list_for_each(list, &dev->maplist) { |
b5e89ed5 | 297 | if (i == idx) { |
55910517 | 298 | r_list = list_entry(list, struct drm_map_list, head); |
1da177e4 LT |
299 | break; |
300 | } | |
301 | i++; | |
302 | } | |
b5e89ed5 | 303 | if (!r_list || !r_list->map) { |
30e2fb18 | 304 | mutex_unlock(&dev->struct_mutex); |
1da177e4 LT |
305 | return -EINVAL; |
306 | } | |
307 | ||
c153f45f EA |
308 | map->offset = r_list->map->offset; |
309 | map->size = r_list->map->size; | |
310 | map->type = r_list->map->type; | |
311 | map->flags = r_list->map->flags; | |
312 | map->handle = (void *)(unsigned long) r_list->user_token; | |
0dd99f1b AL |
313 | |
314 | #ifdef CONFIG_X86 | |
315 | /* | |
316 | * There appears to be exactly one user of the mtrr index: dritest. | |
317 | * It's easy enough to keep it working on non-PAT systems. | |
318 | */ | |
319 | map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr); | |
320 | #else | |
321 | map->mtrr = -1; | |
322 | #endif | |
323 | ||
30e2fb18 | 324 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 325 | |
1da177e4 LT |
326 | return 0; |
327 | } | |
328 | ||
329 | /** | |
330 | * Get client information. | |
331 | * | |
332 | * \param inode device inode. | |
6c340eac | 333 | * \param file_priv DRM file private. |
1da177e4 LT |
334 | * \param cmd command. |
335 | * \param arg user argument, pointing to a drm_client structure. | |
b5e89ed5 | 336 | * |
1da177e4 LT |
337 | * \return zero on success or a negative number on failure. |
338 | * | |
339 | * Searches for the client with the specified index and copies its information | |
340 | * into userspace | |
341 | */ | |
c153f45f EA |
342 | int drm_getclient(struct drm_device *dev, void *data, |
343 | struct drm_file *file_priv) | |
1da177e4 | 344 | { |
c153f45f | 345 | struct drm_client *client = data; |
09b4ea47 | 346 | |
719524df DV |
347 | /* |
348 | * Hollowed-out getclient ioctl to keep some dead old drm tests/tools | |
349 | * not breaking completely. Userspace tools stop enumerating one they | |
350 | * get -EINVAL, hence this is the return value we need to hand back for | |
351 | * no clients tracked. | |
352 | * | |
353 | * Unfortunately some clients (*cough* libva *cough*) use this in a fun | |
354 | * attempt to figure out whether they're authenticated or not. Since | |
355 | * that's the only thing they care about, give it to the directly | |
356 | * instead of walking one giant list. | |
357 | */ | |
358 | if (client->idx == 0) { | |
359 | client->auth = file_priv->authenticated; | |
360 | client->pid = pid_vnr(file_priv->pid); | |
361 | client->uid = from_kuid_munged(current_user_ns(), | |
362 | file_priv->uid); | |
363 | client->magic = 0; | |
364 | client->iocs = 0; | |
365 | ||
366 | return 0; | |
367 | } else { | |
368 | return -EINVAL; | |
bd1b331f | 369 | } |
1da177e4 LT |
370 | } |
371 | ||
b5e89ed5 DA |
372 | /** |
373 | * Get statistics information. | |
374 | * | |
1da177e4 | 375 | * \param inode device inode. |
6c340eac | 376 | * \param file_priv DRM file private. |
1da177e4 LT |
377 | * \param cmd command. |
378 | * \param arg user argument, pointing to a drm_stats structure. | |
b5e89ed5 | 379 | * |
1da177e4 LT |
380 | * \return zero on success or a negative number on failure. |
381 | */ | |
c153f45f EA |
382 | int drm_getstats(struct drm_device *dev, void *data, |
383 | struct drm_file *file_priv) | |
1da177e4 | 384 | { |
c153f45f | 385 | struct drm_stats *stats = data; |
1da177e4 | 386 | |
d79cdc83 | 387 | /* Clear stats to prevent userspace from eating its stack garbage. */ |
246a3d18 | 388 | memset(stats, 0, sizeof(*stats)); |
b5e89ed5 | 389 | |
1da177e4 LT |
390 | return 0; |
391 | } | |
392 | ||
9f35421e BS |
393 | /** |
394 | * Get device/driver capabilities | |
395 | */ | |
396 | int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
397 | { | |
398 | struct drm_get_cap *req = data; | |
399 | ||
400 | req->value = 0; | |
e73f88af DA |
401 | switch (req->capability) { |
402 | case DRM_CAP_DUMB_BUFFER: | |
403 | if (dev->driver->dumb_create) | |
404 | req->value = 1; | |
405 | break; | |
51eab416 | 406 | case DRM_CAP_VBLANK_HIGH_CRTC: |
19b01b5f IH |
407 | req->value = 1; |
408 | break; | |
019d96cb DA |
409 | case DRM_CAP_DUMB_PREFERRED_DEPTH: |
410 | req->value = dev->mode_config.preferred_depth; | |
411 | break; | |
412 | case DRM_CAP_DUMB_PREFER_SHADOW: | |
413 | req->value = dev->mode_config.prefer_shadow; | |
414 | break; | |
4271a409 DA |
415 | case DRM_CAP_PRIME: |
416 | req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0; | |
417 | req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0; | |
418 | break; | |
c61eef72 ID |
419 | case DRM_CAP_TIMESTAMP_MONOTONIC: |
420 | req->value = drm_timestamp_monotonic; | |
421 | break; | |
62f2104f KP |
422 | case DRM_CAP_ASYNC_PAGE_FLIP: |
423 | req->value = dev->mode_config.async_page_flip; | |
424 | break; | |
8716ed4e AD |
425 | case DRM_CAP_CURSOR_WIDTH: |
426 | if (dev->mode_config.cursor_width) | |
427 | req->value = dev->mode_config.cursor_width; | |
428 | else | |
429 | req->value = 64; | |
430 | break; | |
431 | case DRM_CAP_CURSOR_HEIGHT: | |
432 | if (dev->mode_config.cursor_height) | |
433 | req->value = dev->mode_config.cursor_height; | |
434 | else | |
435 | req->value = 64; | |
436 | break; | |
e73f88af DA |
437 | default: |
438 | return -EINVAL; | |
439 | } | |
9f35421e BS |
440 | return 0; |
441 | } | |
442 | ||
1c0814fe DL |
443 | /** |
444 | * Set device/driver capabilities | |
445 | */ | |
446 | int | |
447 | drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) | |
448 | { | |
61d8e328 DL |
449 | struct drm_set_client_cap *req = data; |
450 | ||
451 | switch (req->capability) { | |
452 | case DRM_CLIENT_CAP_STEREO_3D: | |
453 | if (req->value > 1) | |
454 | return -EINVAL; | |
455 | file_priv->stereo_allowed = req->value; | |
456 | break; | |
681e7ec7 | 457 | case DRM_CLIENT_CAP_UNIVERSAL_PLANES: |
681e7ec7 MR |
458 | if (req->value > 1) |
459 | return -EINVAL; | |
460 | file_priv->universal_planes = req->value; | |
461 | break; | |
61d8e328 DL |
462 | default: |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | return 0; | |
1c0814fe DL |
467 | } |
468 | ||
1da177e4 LT |
469 | /** |
470 | * Setversion ioctl. | |
471 | * | |
472 | * \param inode device inode. | |
6c340eac | 473 | * \param file_priv DRM file private. |
1da177e4 LT |
474 | * \param cmd command. |
475 | * \param arg user argument, pointing to a drm_lock structure. | |
476 | * \return zero on success or negative number on failure. | |
477 | * | |
478 | * Sets the requested interface version | |
479 | */ | |
c153f45f | 480 | int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv) |
1da177e4 | 481 | { |
c153f45f EA |
482 | struct drm_set_version *sv = data; |
483 | int if_version, retcode = 0; | |
484 | ||
485 | if (sv->drm_di_major != -1) { | |
486 | if (sv->drm_di_major != DRM_IF_MAJOR || | |
487 | sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) { | |
488 | retcode = -EINVAL; | |
489 | goto done; | |
490 | } | |
491 | if_version = DRM_IF_VERSION(sv->drm_di_major, | |
492 | sv->drm_di_minor); | |
3d77461e | 493 | dev->if_version = max(if_version, dev->if_version); |
c153f45f | 494 | if (sv->drm_di_minor >= 1) { |
1da177e4 LT |
495 | /* |
496 | * Version 1.1 includes tying of DRM to specific device | |
c17c2f89 | 497 | * Version 1.4 has proper PCI domain support |
1da177e4 | 498 | */ |
3fb688fd CW |
499 | retcode = drm_set_busid(dev, file_priv); |
500 | if (retcode) | |
501 | goto done; | |
1da177e4 LT |
502 | } |
503 | } | |
504 | ||
c153f45f EA |
505 | if (sv->drm_dd_major != -1) { |
506 | if (sv->drm_dd_major != dev->driver->major || | |
507 | sv->drm_dd_minor < 0 || sv->drm_dd_minor > | |
508 | dev->driver->minor) { | |
509 | retcode = -EINVAL; | |
510 | goto done; | |
511 | } | |
1da177e4 | 512 | } |
c153f45f EA |
513 | |
514 | done: | |
515 | sv->drm_di_major = DRM_IF_MAJOR; | |
516 | sv->drm_di_minor = DRM_IF_MINOR; | |
517 | sv->drm_dd_major = dev->driver->major; | |
518 | sv->drm_dd_minor = dev->driver->minor; | |
519 | ||
520 | return retcode; | |
1da177e4 LT |
521 | } |
522 | ||
523 | /** No-op ioctl. */ | |
c153f45f EA |
524 | int drm_noop(struct drm_device *dev, void *data, |
525 | struct drm_file *file_priv) | |
1da177e4 LT |
526 | { |
527 | DRM_DEBUG("\n"); | |
528 | return 0; | |
529 | } | |
b2c606fe | 530 | EXPORT_SYMBOL(drm_noop); |
ec8f112d DH |
531 | |
532 | /** | |
533 | * Copy and IOCTL return string to user space | |
534 | */ | |
535 | static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value) | |
536 | { | |
537 | int len; | |
538 | ||
539 | /* don't overflow userbuf */ | |
540 | len = strlen(value); | |
541 | if (len > *buf_len) | |
542 | len = *buf_len; | |
543 | ||
544 | /* let userspace know exact length of driver value (which could be | |
545 | * larger than the userspace-supplied buffer) */ | |
546 | *buf_len = strlen(value); | |
547 | ||
548 | /* finally, try filling in the userbuf */ | |
549 | if (len && buf) | |
550 | if (copy_to_user(buf, value, len)) | |
551 | return -EFAULT; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /** | |
556 | * Get version information | |
557 | * | |
558 | * \param inode device inode. | |
559 | * \param filp file pointer. | |
560 | * \param cmd command. | |
561 | * \param arg user argument, pointing to a drm_version structure. | |
562 | * \return zero on success or negative number on failure. | |
563 | * | |
564 | * Fills in the version information in \p arg. | |
565 | */ | |
566 | static int drm_version(struct drm_device *dev, void *data, | |
567 | struct drm_file *file_priv) | |
568 | { | |
569 | struct drm_version *version = data; | |
570 | int err; | |
571 | ||
572 | version->version_major = dev->driver->major; | |
573 | version->version_minor = dev->driver->minor; | |
574 | version->version_patchlevel = dev->driver->patchlevel; | |
575 | err = drm_copy_field(version->name, &version->name_len, | |
576 | dev->driver->name); | |
577 | if (!err) | |
578 | err = drm_copy_field(version->date, &version->date_len, | |
579 | dev->driver->date); | |
580 | if (!err) | |
581 | err = drm_copy_field(version->desc, &version->desc_len, | |
582 | dev->driver->desc); | |
583 | ||
584 | return err; | |
585 | } | |
586 | ||
587 | /** | |
588 | * drm_ioctl_permit - Check ioctl permissions against caller | |
589 | * | |
590 | * @flags: ioctl permission flags. | |
591 | * @file_priv: Pointer to struct drm_file identifying the caller. | |
592 | * | |
593 | * Checks whether the caller is allowed to run an ioctl with the | |
594 | * indicated permissions. If so, returns zero. Otherwise returns an | |
595 | * error code suitable for ioctl return. | |
596 | */ | |
597 | static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv) | |
598 | { | |
599 | /* ROOT_ONLY is only for CAP_SYS_ADMIN */ | |
600 | if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN))) | |
601 | return -EACCES; | |
602 | ||
603 | /* AUTH is only for authenticated or render client */ | |
604 | if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) && | |
605 | !file_priv->authenticated)) | |
606 | return -EACCES; | |
607 | ||
608 | /* MASTER is only for master or control clients */ | |
7963e9db | 609 | if (unlikely((flags & DRM_MASTER) && !file_priv->is_master && |
ec8f112d DH |
610 | !drm_is_control_client(file_priv))) |
611 | return -EACCES; | |
612 | ||
613 | /* Control clients must be explicitly allowed */ | |
614 | if (unlikely(!(flags & DRM_CONTROL_ALLOW) && | |
615 | drm_is_control_client(file_priv))) | |
616 | return -EACCES; | |
617 | ||
618 | /* Render clients must be explicitly allowed */ | |
619 | if (unlikely(!(flags & DRM_RENDER_ALLOW) && | |
620 | drm_is_render_client(file_priv))) | |
621 | return -EACCES; | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | /** | |
627 | * Called whenever a process performs an ioctl on /dev/drm. | |
628 | * | |
629 | * \param inode device inode. | |
630 | * \param file_priv DRM file private. | |
631 | * \param cmd command. | |
632 | * \param arg user argument. | |
633 | * \return zero on success or negative number on failure. | |
634 | * | |
635 | * Looks up the ioctl function in the ::ioctls table, checking for root | |
636 | * previleges if so required, and dispatches to the respective function. | |
637 | */ | |
638 | long drm_ioctl(struct file *filp, | |
639 | unsigned int cmd, unsigned long arg) | |
640 | { | |
641 | struct drm_file *file_priv = filp->private_data; | |
642 | struct drm_device *dev; | |
643 | const struct drm_ioctl_desc *ioctl = NULL; | |
644 | drm_ioctl_t *func; | |
645 | unsigned int nr = DRM_IOCTL_NR(cmd); | |
646 | int retcode = -EINVAL; | |
647 | char stack_kdata[128]; | |
648 | char *kdata = NULL; | |
649 | unsigned int usize, asize; | |
650 | ||
651 | dev = file_priv->minor->dev; | |
652 | ||
653 | if (drm_device_is_unplugged(dev)) | |
654 | return -ENODEV; | |
655 | ||
656 | if ((nr >= DRM_CORE_IOCTL_COUNT) && | |
657 | ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) | |
658 | goto err_i1; | |
659 | if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && | |
660 | (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) { | |
661 | u32 drv_size; | |
662 | ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; | |
663 | drv_size = _IOC_SIZE(ioctl->cmd_drv); | |
664 | usize = asize = _IOC_SIZE(cmd); | |
665 | if (drv_size > asize) | |
666 | asize = drv_size; | |
667 | cmd = ioctl->cmd_drv; | |
668 | } | |
669 | else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { | |
670 | u32 drv_size; | |
671 | ||
672 | ioctl = &drm_ioctls[nr]; | |
673 | ||
674 | drv_size = _IOC_SIZE(ioctl->cmd); | |
675 | usize = asize = _IOC_SIZE(cmd); | |
676 | if (drv_size > asize) | |
677 | asize = drv_size; | |
678 | ||
679 | cmd = ioctl->cmd; | |
680 | } else | |
681 | goto err_i1; | |
682 | ||
683 | DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n", | |
684 | task_pid_nr(current), | |
685 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
686 | file_priv->authenticated, ioctl->name); | |
687 | ||
688 | /* Do not trust userspace, use our own definition */ | |
689 | func = ioctl->func; | |
690 | ||
691 | if (unlikely(!func)) { | |
692 | DRM_DEBUG("no function\n"); | |
693 | retcode = -EINVAL; | |
694 | goto err_i1; | |
695 | } | |
696 | ||
697 | retcode = drm_ioctl_permit(ioctl->flags, file_priv); | |
698 | if (unlikely(retcode)) | |
699 | goto err_i1; | |
700 | ||
701 | if (cmd & (IOC_IN | IOC_OUT)) { | |
702 | if (asize <= sizeof(stack_kdata)) { | |
703 | kdata = stack_kdata; | |
704 | } else { | |
705 | kdata = kmalloc(asize, GFP_KERNEL); | |
706 | if (!kdata) { | |
707 | retcode = -ENOMEM; | |
708 | goto err_i1; | |
709 | } | |
710 | } | |
711 | if (asize > usize) | |
712 | memset(kdata + usize, 0, asize - usize); | |
713 | } | |
714 | ||
715 | if (cmd & IOC_IN) { | |
716 | if (copy_from_user(kdata, (void __user *)arg, | |
717 | usize) != 0) { | |
718 | retcode = -EFAULT; | |
719 | goto err_i1; | |
720 | } | |
721 | } else if (cmd & IOC_OUT) { | |
722 | memset(kdata, 0, usize); | |
723 | } | |
724 | ||
725 | if (ioctl->flags & DRM_UNLOCKED) | |
726 | retcode = func(dev, kdata, file_priv); | |
727 | else { | |
728 | mutex_lock(&drm_global_mutex); | |
729 | retcode = func(dev, kdata, file_priv); | |
730 | mutex_unlock(&drm_global_mutex); | |
731 | } | |
732 | ||
733 | if (cmd & IOC_OUT) { | |
734 | if (copy_to_user((void __user *)arg, kdata, | |
735 | usize) != 0) | |
736 | retcode = -EFAULT; | |
737 | } | |
738 | ||
739 | err_i1: | |
740 | if (!ioctl) | |
741 | DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n", | |
742 | task_pid_nr(current), | |
743 | (long)old_encode_dev(file_priv->minor->kdev->devt), | |
744 | file_priv->authenticated, cmd, nr); | |
745 | ||
746 | if (kdata != stack_kdata) | |
747 | kfree(kdata); | |
748 | if (retcode) | |
749 | DRM_DEBUG("ret = %d\n", retcode); | |
750 | return retcode; | |
751 | } | |
752 | EXPORT_SYMBOL(drm_ioctl); | |
753 | ||
754 | /** | |
755 | * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags | |
756 | * | |
757 | * @nr: Ioctl number. | |
758 | * @flags: Where to return the ioctl permission flags | |
759 | */ | |
760 | bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) | |
761 | { | |
762 | if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) || | |
763 | (nr < DRM_COMMAND_BASE)) { | |
764 | *flags = drm_ioctls[nr].flags; | |
765 | return true; | |
766 | } | |
767 | ||
768 | return false; | |
769 | } | |
770 | EXPORT_SYMBOL(drm_ioctl_flags); |