3 * IOCTL processing for DRM
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
37 #include <drm/drm_core.h>
39 #include <linux/pci.h>
40 #include <linux/export.h>
48 * \param inode device inode.
49 * \param file_priv DRM file private.
51 * \param arg user argument, pointing to a drm_unique structure.
52 * \return zero on success or a negative number on failure.
54 * Copies the bus id from drm_device::unique into user space.
56 int drm_getunique(struct drm_device
*dev
, void *data
,
57 struct drm_file
*file_priv
)
59 struct drm_unique
*u
= data
;
60 struct drm_master
*master
= file_priv
->master
;
62 if (u
->unique_len
>= master
->unique_len
) {
63 if (copy_to_user(u
->unique
, master
->unique
, master
->unique_len
))
66 u
->unique_len
= master
->unique_len
;
72 drm_unset_busid(struct drm_device
*dev
,
73 struct drm_master
*master
)
75 kfree(master
->unique
);
76 master
->unique
= NULL
;
77 master
->unique_len
= 0;
78 master
->unique_size
= 0;
84 * \param inode device inode.
85 * \param file_priv DRM file private.
87 * \param arg user argument, pointing to a drm_unique structure.
88 * \return zero on success or a negative number on failure.
90 * Copies the bus id from userspace into drm_device::unique, and verifies that
91 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
92 * in interface version 1.1 and will return EBUSY when setversion has requested
93 * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
94 * UMS was only ever supported on pci devices.
96 int drm_setunique(struct drm_device
*dev
, void *data
,
97 struct drm_file
*file_priv
)
99 struct drm_unique
*u
= data
;
100 struct drm_master
*master
= file_priv
->master
;
103 if (master
->unique_len
|| master
->unique
)
106 if (!u
->unique_len
|| u
->unique_len
> 1024)
109 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
112 if (WARN_ON(!dev
->pdev
))
115 ret
= drm_pci_set_unique(dev
, master
, u
);
122 drm_unset_busid(dev
, master
);
126 static int drm_set_busid(struct drm_device
*dev
, struct drm_file
*file_priv
)
128 struct drm_master
*master
= file_priv
->master
;
131 if (master
->unique
!= NULL
)
132 drm_unset_busid(dev
, master
);
134 if (dev
->driver
->bus
&& dev
->driver
->bus
->set_busid
) {
135 ret
= dev
->driver
->bus
->set_busid(dev
, master
);
137 drm_unset_busid(dev
, master
);
141 if (WARN(dev
->unique
== NULL
,
142 "No drm_bus.set_busid() implementation provided by "
143 "%ps. Use drm_dev_set_unique() to set the unique "
144 "name explicitly.", dev
->driver
))
147 master
->unique
= kstrdup(dev
->unique
, GFP_KERNEL
);
149 master
->unique_len
= strlen(dev
->unique
);
156 * Get a mapping information.
158 * \param inode device inode.
159 * \param file_priv DRM file private.
160 * \param cmd command.
161 * \param arg user argument, pointing to a drm_map structure.
163 * \return zero on success or a negative number on failure.
165 * Searches for the mapping with the specified offset and copies its information
168 int drm_getmap(struct drm_device
*dev
, void *data
,
169 struct drm_file
*file_priv
)
171 struct drm_map
*map
= data
;
172 struct drm_map_list
*r_list
= NULL
;
173 struct list_head
*list
;
182 mutex_lock(&dev
->struct_mutex
);
183 list_for_each(list
, &dev
->maplist
) {
185 r_list
= list_entry(list
, struct drm_map_list
, head
);
190 if (!r_list
|| !r_list
->map
) {
191 mutex_unlock(&dev
->struct_mutex
);
195 map
->offset
= r_list
->map
->offset
;
196 map
->size
= r_list
->map
->size
;
197 map
->type
= r_list
->map
->type
;
198 map
->flags
= r_list
->map
->flags
;
199 map
->handle
= (void *)(unsigned long) r_list
->user_token
;
203 * There appears to be exactly one user of the mtrr index: dritest.
204 * It's easy enough to keep it working on non-PAT systems.
206 map
->mtrr
= phys_wc_to_mtrr_index(r_list
->map
->mtrr
);
211 mutex_unlock(&dev
->struct_mutex
);
217 * Get client information.
219 * \param inode device inode.
220 * \param file_priv DRM file private.
221 * \param cmd command.
222 * \param arg user argument, pointing to a drm_client structure.
224 * \return zero on success or a negative number on failure.
226 * Searches for the client with the specified index and copies its information
229 int drm_getclient(struct drm_device
*dev
, void *data
,
230 struct drm_file
*file_priv
)
232 struct drm_client
*client
= data
;
235 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
236 * not breaking completely. Userspace tools stop enumerating one they
237 * get -EINVAL, hence this is the return value we need to hand back for
238 * no clients tracked.
240 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
241 * attempt to figure out whether they're authenticated or not. Since
242 * that's the only thing they care about, give it to the directly
243 * instead of walking one giant list.
245 if (client
->idx
== 0) {
246 client
->auth
= file_priv
->authenticated
;
247 client
->pid
= pid_vnr(file_priv
->pid
);
248 client
->uid
= from_kuid_munged(current_user_ns(),
260 * Get statistics information.
262 * \param inode device inode.
263 * \param file_priv DRM file private.
264 * \param cmd command.
265 * \param arg user argument, pointing to a drm_stats structure.
267 * \return zero on success or a negative number on failure.
269 int drm_getstats(struct drm_device
*dev
, void *data
,
270 struct drm_file
*file_priv
)
272 struct drm_stats
*stats
= data
;
274 /* Clear stats to prevent userspace from eating its stack garbage. */
275 memset(stats
, 0, sizeof(*stats
));
281 * Get device/driver capabilities
283 int drm_getcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
285 struct drm_get_cap
*req
= data
;
288 switch (req
->capability
) {
289 case DRM_CAP_DUMB_BUFFER
:
290 if (dev
->driver
->dumb_create
)
293 case DRM_CAP_VBLANK_HIGH_CRTC
:
296 case DRM_CAP_DUMB_PREFERRED_DEPTH
:
297 req
->value
= dev
->mode_config
.preferred_depth
;
299 case DRM_CAP_DUMB_PREFER_SHADOW
:
300 req
->value
= dev
->mode_config
.prefer_shadow
;
303 req
->value
|= dev
->driver
->prime_fd_to_handle
? DRM_PRIME_CAP_IMPORT
: 0;
304 req
->value
|= dev
->driver
->prime_handle_to_fd
? DRM_PRIME_CAP_EXPORT
: 0;
306 case DRM_CAP_TIMESTAMP_MONOTONIC
:
307 req
->value
= drm_timestamp_monotonic
;
309 case DRM_CAP_ASYNC_PAGE_FLIP
:
310 req
->value
= dev
->mode_config
.async_page_flip
;
312 case DRM_CAP_CURSOR_WIDTH
:
313 if (dev
->mode_config
.cursor_width
)
314 req
->value
= dev
->mode_config
.cursor_width
;
318 case DRM_CAP_CURSOR_HEIGHT
:
319 if (dev
->mode_config
.cursor_height
)
320 req
->value
= dev
->mode_config
.cursor_height
;
331 * Set device/driver capabilities
334 drm_setclientcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
336 struct drm_set_client_cap
*req
= data
;
338 switch (req
->capability
) {
339 case DRM_CLIENT_CAP_STEREO_3D
:
342 file_priv
->stereo_allowed
= req
->value
;
344 case DRM_CLIENT_CAP_UNIVERSAL_PLANES
:
345 if (!drm_universal_planes
)
349 file_priv
->universal_planes
= req
->value
;
361 * \param inode device inode.
362 * \param file_priv DRM file private.
363 * \param cmd command.
364 * \param arg user argument, pointing to a drm_lock structure.
365 * \return zero on success or negative number on failure.
367 * Sets the requested interface version
369 int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
371 struct drm_set_version
*sv
= data
;
372 int if_version
, retcode
= 0;
374 if (sv
->drm_di_major
!= -1) {
375 if (sv
->drm_di_major
!= DRM_IF_MAJOR
||
376 sv
->drm_di_minor
< 0 || sv
->drm_di_minor
> DRM_IF_MINOR
) {
380 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
382 dev
->if_version
= max(if_version
, dev
->if_version
);
383 if (sv
->drm_di_minor
>= 1) {
385 * Version 1.1 includes tying of DRM to specific device
386 * Version 1.4 has proper PCI domain support
388 retcode
= drm_set_busid(dev
, file_priv
);
394 if (sv
->drm_dd_major
!= -1) {
395 if (sv
->drm_dd_major
!= dev
->driver
->major
||
396 sv
->drm_dd_minor
< 0 || sv
->drm_dd_minor
>
397 dev
->driver
->minor
) {
404 sv
->drm_di_major
= DRM_IF_MAJOR
;
405 sv
->drm_di_minor
= DRM_IF_MINOR
;
406 sv
->drm_dd_major
= dev
->driver
->major
;
407 sv
->drm_dd_minor
= dev
->driver
->minor
;
413 int drm_noop(struct drm_device
*dev
, void *data
,
414 struct drm_file
*file_priv
)
419 EXPORT_SYMBOL(drm_noop
);