2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Author Gareth Hughes <gareth@valinux.com>
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:
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
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.
32 #include <drm/drm_core.h>
33 #include "drm_legacy.h"
35 #include <linux/pci.h>
36 #include <linux/export.h>
41 static int drm_version(struct drm_device
*dev
, void *data
,
42 struct drm_file
*file_priv
);
44 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
45 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
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
),
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
),
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
),
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
),
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
),
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
),
76 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
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
),
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
),
85 DRM_IOCTL_DEF(DRM_IOCTL_LOCK
, drm_lock
, DRM_AUTH
),
86 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK
, drm_unlock
, DRM_AUTH
),
88 DRM_IOCTL_DEF(DRM_IOCTL_FINISH
, drm_noop
, DRM_AUTH
),
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
),
97 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL
, drm_control
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
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
),
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
),
113 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK
, drm_wait_vblank
, DRM_UNLOCKED
),
115 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL
, drm_modeset_ctl
, 0),
117 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
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
),
123 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES
, drm_mode_getresources
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
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
),
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
),
157 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
162 * \param inode device inode.
163 * \param file_priv DRM file private.
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.
168 * Copies the bus id from drm_device::unique into user space.
170 int drm_getunique(struct drm_device
*dev
, void *data
,
171 struct drm_file
*file_priv
)
173 struct drm_unique
*u
= data
;
174 struct drm_master
*master
= file_priv
->master
;
176 if (u
->unique_len
>= master
->unique_len
) {
177 if (copy_to_user(u
->unique
, master
->unique
, master
->unique_len
))
180 u
->unique_len
= master
->unique_len
;
186 drm_unset_busid(struct drm_device
*dev
,
187 struct drm_master
*master
)
189 kfree(master
->unique
);
190 master
->unique
= NULL
;
191 master
->unique_len
= 0;
192 master
->unique_size
= 0;
198 * \param inode device inode.
199 * \param file_priv DRM file private.
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.
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
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.
210 int drm_setunique(struct drm_device
*dev
, void *data
,
211 struct drm_file
*file_priv
)
213 struct drm_unique
*u
= data
;
214 struct drm_master
*master
= file_priv
->master
;
217 if (master
->unique_len
|| master
->unique
)
220 if (!u
->unique_len
|| u
->unique_len
> 1024)
223 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
226 if (WARN_ON(!dev
->pdev
))
229 ret
= drm_pci_set_unique(dev
, master
, u
);
236 drm_unset_busid(dev
, master
);
240 static int drm_set_busid(struct drm_device
*dev
, struct drm_file
*file_priv
)
242 struct drm_master
*master
= file_priv
->master
;
245 if (master
->unique
!= NULL
)
246 drm_unset_busid(dev
, master
);
248 if (dev
->driver
->bus
&& dev
->driver
->bus
->set_busid
) {
249 ret
= dev
->driver
->bus
->set_busid(dev
, master
);
251 drm_unset_busid(dev
, master
);
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
))
261 master
->unique
= kstrdup(dev
->unique
, GFP_KERNEL
);
263 master
->unique_len
= strlen(dev
->unique
);
270 * Get a mapping information.
272 * \param inode device inode.
273 * \param file_priv DRM file private.
274 * \param cmd command.
275 * \param arg user argument, pointing to a drm_map structure.
277 * \return zero on success or a negative number on failure.
279 * Searches for the mapping with the specified offset and copies its information
282 int drm_getmap(struct drm_device
*dev
, void *data
,
283 struct drm_file
*file_priv
)
285 struct drm_map
*map
= data
;
286 struct drm_map_list
*r_list
= NULL
;
287 struct list_head
*list
;
296 mutex_lock(&dev
->struct_mutex
);
297 list_for_each(list
, &dev
->maplist
) {
299 r_list
= list_entry(list
, struct drm_map_list
, head
);
304 if (!r_list
|| !r_list
->map
) {
305 mutex_unlock(&dev
->struct_mutex
);
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
;
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.
320 map
->mtrr
= phys_wc_to_mtrr_index(r_list
->map
->mtrr
);
325 mutex_unlock(&dev
->struct_mutex
);
331 * Get client information.
333 * \param inode device inode.
334 * \param file_priv DRM file private.
335 * \param cmd command.
336 * \param arg user argument, pointing to a drm_client structure.
338 * \return zero on success or a negative number on failure.
340 * Searches for the client with the specified index and copies its information
343 int drm_getclient(struct drm_device
*dev
, void *data
,
344 struct drm_file
*file_priv
)
346 struct drm_client
*client
= data
;
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.
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.
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(),
374 * Get statistics information.
376 * \param inode device inode.
377 * \param file_priv DRM file private.
378 * \param cmd command.
379 * \param arg user argument, pointing to a drm_stats structure.
381 * \return zero on success or a negative number on failure.
383 int drm_getstats(struct drm_device
*dev
, void *data
,
384 struct drm_file
*file_priv
)
386 struct drm_stats
*stats
= data
;
388 /* Clear stats to prevent userspace from eating its stack garbage. */
389 memset(stats
, 0, sizeof(*stats
));
395 * Get device/driver capabilities
397 int drm_getcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
399 struct drm_get_cap
*req
= data
;
402 switch (req
->capability
) {
403 case DRM_CAP_DUMB_BUFFER
:
404 if (dev
->driver
->dumb_create
)
407 case DRM_CAP_VBLANK_HIGH_CRTC
:
410 case DRM_CAP_DUMB_PREFERRED_DEPTH
:
411 req
->value
= dev
->mode_config
.preferred_depth
;
413 case DRM_CAP_DUMB_PREFER_SHADOW
:
414 req
->value
= dev
->mode_config
.prefer_shadow
;
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;
420 case DRM_CAP_TIMESTAMP_MONOTONIC
:
421 req
->value
= drm_timestamp_monotonic
;
423 case DRM_CAP_ASYNC_PAGE_FLIP
:
424 req
->value
= dev
->mode_config
.async_page_flip
;
426 case DRM_CAP_CURSOR_WIDTH
:
427 if (dev
->mode_config
.cursor_width
)
428 req
->value
= dev
->mode_config
.cursor_width
;
432 case DRM_CAP_CURSOR_HEIGHT
:
433 if (dev
->mode_config
.cursor_height
)
434 req
->value
= dev
->mode_config
.cursor_height
;
445 * Set device/driver capabilities
448 drm_setclientcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
450 struct drm_set_client_cap
*req
= data
;
452 switch (req
->capability
) {
453 case DRM_CLIENT_CAP_STEREO_3D
:
456 file_priv
->stereo_allowed
= req
->value
;
458 case DRM_CLIENT_CAP_UNIVERSAL_PLANES
:
461 file_priv
->universal_planes
= req
->value
;
473 * \param inode device inode.
474 * \param file_priv DRM file private.
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.
479 * Sets the requested interface version
481 int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
483 struct drm_set_version
*sv
= data
;
484 int if_version
, retcode
= 0;
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
) {
492 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
494 dev
->if_version
= max(if_version
, dev
->if_version
);
495 if (sv
->drm_di_minor
>= 1) {
497 * Version 1.1 includes tying of DRM to specific device
498 * Version 1.4 has proper PCI domain support
500 retcode
= drm_set_busid(dev
, file_priv
);
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
) {
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
;
525 int drm_noop(struct drm_device
*dev
, void *data
,
526 struct drm_file
*file_priv
)
531 EXPORT_SYMBOL(drm_noop
);
534 * Copy and IOCTL return string to user space
536 static int drm_copy_field(char __user
*buf
, size_t *buf_len
, const char *value
)
540 /* don't overflow userbuf */
545 /* let userspace know exact length of driver value (which could be
546 * larger than the userspace-supplied buffer) */
547 *buf_len
= strlen(value
);
549 /* finally, try filling in the userbuf */
551 if (copy_to_user(buf
, value
, len
))
557 * Get version information
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.
565 * Fills in the version information in \p arg.
567 static int drm_version(struct drm_device
*dev
, void *data
,
568 struct drm_file
*file_priv
)
570 struct drm_version
*version
= data
;
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
,
579 err
= drm_copy_field(version
->date
, &version
->date_len
,
582 err
= drm_copy_field(version
->desc
, &version
->desc_len
,
589 * drm_ioctl_permit - Check ioctl permissions against caller
591 * @flags: ioctl permission flags.
592 * @file_priv: Pointer to struct drm_file identifying the caller.
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.
598 static int drm_ioctl_permit(u32 flags
, struct drm_file
*file_priv
)
600 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
601 if (unlikely((flags
& DRM_ROOT_ONLY
) && !capable(CAP_SYS_ADMIN
)))
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
))
609 /* MASTER is only for master or control clients */
610 if (unlikely((flags
& DRM_MASTER
) && !file_priv
->is_master
&&
611 !drm_is_control_client(file_priv
)))
614 /* Control clients must be explicitly allowed */
615 if (unlikely(!(flags
& DRM_CONTROL_ALLOW
) &&
616 drm_is_control_client(file_priv
)))
619 /* Render clients must be explicitly allowed */
620 if (unlikely(!(flags
& DRM_RENDER_ALLOW
) &&
621 drm_is_render_client(file_priv
)))
628 * Called whenever a process performs an ioctl on /dev/drm.
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.
636 * Looks up the ioctl function in the ::ioctls table, checking for root
637 * previleges if so required, and dispatches to the respective function.
639 long drm_ioctl(struct file
*filp
,
640 unsigned int cmd
, unsigned long arg
)
642 struct drm_file
*file_priv
= filp
->private_data
;
643 struct drm_device
*dev
;
644 const struct drm_ioctl_desc
*ioctl
= NULL
;
646 unsigned int nr
= DRM_IOCTL_NR(cmd
);
647 int retcode
= -EINVAL
;
648 char stack_kdata
[128];
650 unsigned int usize
, asize
;
652 dev
= file_priv
->minor
->dev
;
654 if (drm_device_is_unplugged(dev
))
657 if ((nr
>= DRM_CORE_IOCTL_COUNT
) &&
658 ((nr
< DRM_COMMAND_BASE
) || (nr
>= DRM_COMMAND_END
)))
660 if ((nr
>= DRM_COMMAND_BASE
) && (nr
< DRM_COMMAND_END
) &&
661 (nr
< DRM_COMMAND_BASE
+ dev
->driver
->num_ioctls
)) {
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
)
668 cmd
= ioctl
->cmd_drv
;
670 else if ((nr
>= DRM_COMMAND_END
) || (nr
< DRM_COMMAND_BASE
)) {
673 ioctl
= &drm_ioctls
[nr
];
675 drv_size
= _IOC_SIZE(ioctl
->cmd
);
676 usize
= asize
= _IOC_SIZE(cmd
);
677 if (drv_size
> asize
)
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
);
689 /* Do not trust userspace, use our own definition */
692 if (unlikely(!func
)) {
693 DRM_DEBUG("no function\n");
698 retcode
= drm_ioctl_permit(ioctl
->flags
, file_priv
);
699 if (unlikely(retcode
))
702 if (cmd
& (IOC_IN
| IOC_OUT
)) {
703 if (asize
<= sizeof(stack_kdata
)) {
706 kdata
= kmalloc(asize
, GFP_KERNEL
);
713 memset(kdata
+ usize
, 0, asize
- usize
);
717 if (copy_from_user(kdata
, (void __user
*)arg
,
722 } else if (cmd
& IOC_OUT
) {
723 memset(kdata
, 0, usize
);
726 if (ioctl
->flags
& DRM_UNLOCKED
)
727 retcode
= func(dev
, kdata
, file_priv
);
729 mutex_lock(&drm_global_mutex
);
730 retcode
= func(dev
, kdata
, file_priv
);
731 mutex_unlock(&drm_global_mutex
);
735 if (copy_to_user((void __user
*)arg
, kdata
,
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
);
747 if (kdata
!= stack_kdata
)
750 DRM_DEBUG("ret = %d\n", retcode
);
753 EXPORT_SYMBOL(drm_ioctl
);
756 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
759 * @flags: Where to return the ioctl permission flags
761 bool drm_ioctl_flags(unsigned int nr
, unsigned int *flags
)
763 if ((nr
>= DRM_COMMAND_END
&& nr
< DRM_CORE_IOCTL_COUNT
) ||
764 (nr
< DRM_COMMAND_BASE
)) {
765 *flags
= drm_ioctls
[nr
].flags
;
771 EXPORT_SYMBOL(drm_ioctl_flags
);