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
)
78 kfree(master
->unique
);
79 master
->unique
= NULL
;
80 master
->unique_len
= 0;
81 master
->unique_size
= 0;
87 * \param inode device inode.
88 * \param file_priv DRM file private.
90 * \param arg user argument, pointing to a drm_unique structure.
91 * \return zero on success or a negative number on failure.
93 * Copies the bus id from userspace into drm_device::unique, and verifies that
94 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
95 * in interface version 1.1 and will return EBUSY when setversion has requested
96 * version 1.1 or greater.
98 int drm_setunique(struct drm_device
*dev
, void *data
,
99 struct drm_file
*file_priv
)
101 struct drm_unique
*u
= data
;
102 struct drm_master
*master
= file_priv
->master
;
105 if (master
->unique_len
|| master
->unique
)
108 if (!u
->unique_len
|| u
->unique_len
> 1024)
111 if (!dev
->driver
->bus
->set_unique
)
114 ret
= dev
->driver
->bus
->set_unique(dev
, master
, u
);
121 drm_unset_busid(dev
, master
);
125 static int drm_set_busid(struct drm_device
*dev
, struct drm_file
*file_priv
)
127 struct drm_master
*master
= file_priv
->master
;
130 if (master
->unique
!= NULL
)
131 drm_unset_busid(dev
, master
);
133 ret
= dev
->driver
->bus
->set_busid(dev
, master
);
138 drm_unset_busid(dev
, master
);
143 * Get a mapping information.
145 * \param inode device inode.
146 * \param file_priv DRM file private.
147 * \param cmd command.
148 * \param arg user argument, pointing to a drm_map structure.
150 * \return zero on success or a negative number on failure.
152 * Searches for the mapping with the specified offset and copies its information
155 int drm_getmap(struct drm_device
*dev
, void *data
,
156 struct drm_file
*file_priv
)
158 struct drm_map
*map
= data
;
159 struct drm_map_list
*r_list
= NULL
;
160 struct list_head
*list
;
169 mutex_lock(&dev
->struct_mutex
);
170 list_for_each(list
, &dev
->maplist
) {
172 r_list
= list_entry(list
, struct drm_map_list
, head
);
177 if (!r_list
|| !r_list
->map
) {
178 mutex_unlock(&dev
->struct_mutex
);
182 map
->offset
= r_list
->map
->offset
;
183 map
->size
= r_list
->map
->size
;
184 map
->type
= r_list
->map
->type
;
185 map
->flags
= r_list
->map
->flags
;
186 map
->handle
= (void *)(unsigned long) r_list
->user_token
;
190 * There appears to be exactly one user of the mtrr index: dritest.
191 * It's easy enough to keep it working on non-PAT systems.
193 map
->mtrr
= phys_wc_to_mtrr_index(r_list
->map
->mtrr
);
198 mutex_unlock(&dev
->struct_mutex
);
204 * Get client information.
206 * \param inode device inode.
207 * \param file_priv DRM file private.
208 * \param cmd command.
209 * \param arg user argument, pointing to a drm_client structure.
211 * \return zero on success or a negative number on failure.
213 * Searches for the client with the specified index and copies its information
216 int drm_getclient(struct drm_device
*dev
, void *data
,
217 struct drm_file
*file_priv
)
219 struct drm_client
*client
= data
;
227 mutex_lock(&dev
->struct_mutex
);
228 list_for_each_entry(pt
, &dev
->filelist
, lhead
) {
230 client
->auth
= pt
->authenticated
;
231 client
->pid
= pid_vnr(pt
->pid
);
232 client
->uid
= from_kuid_munged(current_user_ns(), pt
->uid
);
233 client
->magic
= pt
->magic
;
234 client
->iocs
= pt
->ioctl_count
;
235 mutex_unlock(&dev
->struct_mutex
);
240 mutex_unlock(&dev
->struct_mutex
);
246 * Get statistics information.
248 * \param inode device inode.
249 * \param file_priv DRM file private.
250 * \param cmd command.
251 * \param arg user argument, pointing to a drm_stats structure.
253 * \return zero on success or a negative number on failure.
255 int drm_getstats(struct drm_device
*dev
, void *data
,
256 struct drm_file
*file_priv
)
258 struct drm_stats
*stats
= data
;
261 memset(stats
, 0, sizeof(*stats
));
263 for (i
= 0; i
< dev
->counters
; i
++) {
264 if (dev
->types
[i
] == _DRM_STAT_LOCK
)
265 stats
->data
[i
].value
=
266 (file_priv
->master
->lock
.hw_lock
? file_priv
->master
->lock
.hw_lock
->lock
: 0);
268 stats
->data
[i
].value
= atomic_read(&dev
->counts
[i
]);
269 stats
->data
[i
].type
= dev
->types
[i
];
272 stats
->count
= dev
->counters
;
278 * Get device/driver capabilities
280 int drm_getcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
282 struct drm_get_cap
*req
= data
;
285 switch (req
->capability
) {
286 case DRM_CAP_DUMB_BUFFER
:
287 if (dev
->driver
->dumb_create
)
290 case DRM_CAP_VBLANK_HIGH_CRTC
:
293 case DRM_CAP_DUMB_PREFERRED_DEPTH
:
294 req
->value
= dev
->mode_config
.preferred_depth
;
296 case DRM_CAP_DUMB_PREFER_SHADOW
:
297 req
->value
= dev
->mode_config
.prefer_shadow
;
300 req
->value
|= dev
->driver
->prime_fd_to_handle
? DRM_PRIME_CAP_IMPORT
: 0;
301 req
->value
|= dev
->driver
->prime_handle_to_fd
? DRM_PRIME_CAP_EXPORT
: 0;
303 case DRM_CAP_TIMESTAMP_MONOTONIC
:
304 req
->value
= drm_timestamp_monotonic
;
315 * \param inode device inode.
316 * \param file_priv DRM file private.
317 * \param cmd command.
318 * \param arg user argument, pointing to a drm_lock structure.
319 * \return zero on success or negative number on failure.
321 * Sets the requested interface version
323 int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
325 struct drm_set_version
*sv
= data
;
326 int if_version
, retcode
= 0;
328 if (sv
->drm_di_major
!= -1) {
329 if (sv
->drm_di_major
!= DRM_IF_MAJOR
||
330 sv
->drm_di_minor
< 0 || sv
->drm_di_minor
> DRM_IF_MINOR
) {
334 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
336 dev
->if_version
= max(if_version
, dev
->if_version
);
337 if (sv
->drm_di_minor
>= 1) {
339 * Version 1.1 includes tying of DRM to specific device
340 * Version 1.4 has proper PCI domain support
342 retcode
= drm_set_busid(dev
, file_priv
);
348 if (sv
->drm_dd_major
!= -1) {
349 if (sv
->drm_dd_major
!= dev
->driver
->major
||
350 sv
->drm_dd_minor
< 0 || sv
->drm_dd_minor
>
351 dev
->driver
->minor
) {
356 if (dev
->driver
->set_version
)
357 dev
->driver
->set_version(dev
, sv
);
361 sv
->drm_di_major
= DRM_IF_MAJOR
;
362 sv
->drm_di_minor
= DRM_IF_MINOR
;
363 sv
->drm_dd_major
= dev
->driver
->major
;
364 sv
->drm_dd_minor
= dev
->driver
->minor
;
370 int drm_noop(struct drm_device
*dev
, void *data
,
371 struct drm_file
*file_priv
)
376 EXPORT_SYMBOL(drm_noop
);