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"
34 #include "drm_internal.h"
35 #include "drm_crtc_internal.h"
37 #include <linux/pci.h>
38 #include <linux/export.h>
40 static int drm_version(struct drm_device
*dev
, void *data
,
41 struct drm_file
*file_priv
);
46 * \param inode device inode.
47 * \param file_priv DRM file private.
49 * \param arg user argument, pointing to a drm_unique structure.
50 * \return zero on success or a negative number on failure.
52 * Copies the bus id from drm_device::unique into user space.
54 static int drm_getunique(struct drm_device
*dev
, void *data
,
55 struct drm_file
*file_priv
)
57 struct drm_unique
*u
= data
;
58 struct drm_master
*master
= file_priv
->master
;
60 if (u
->unique_len
>= master
->unique_len
) {
61 if (copy_to_user(u
->unique
, master
->unique
, master
->unique_len
))
64 u
->unique_len
= master
->unique_len
;
70 drm_unset_busid(struct drm_device
*dev
,
71 struct drm_master
*master
)
73 kfree(master
->unique
);
74 master
->unique
= NULL
;
75 master
->unique_len
= 0;
81 * \param inode device inode.
82 * \param file_priv DRM file private.
84 * \param arg user argument, pointing to a drm_unique structure.
85 * \return zero on success or a negative number on failure.
87 * Copies the bus id from userspace into drm_device::unique, and verifies that
88 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
89 * in interface version 1.1 and will return EBUSY when setversion has requested
90 * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
91 * UMS was only ever supported on pci devices.
93 static int drm_setunique(struct drm_device
*dev
, void *data
,
94 struct drm_file
*file_priv
)
96 struct drm_unique
*u
= data
;
97 struct drm_master
*master
= file_priv
->master
;
100 if (master
->unique_len
|| master
->unique
)
103 if (!u
->unique_len
|| u
->unique_len
> 1024)
106 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
109 if (WARN_ON(!dev
->pdev
))
112 ret
= drm_pci_set_unique(dev
, master
, u
);
119 drm_unset_busid(dev
, master
);
123 static int drm_set_busid(struct drm_device
*dev
, struct drm_file
*file_priv
)
125 struct drm_master
*master
= file_priv
->master
;
128 if (master
->unique
!= NULL
)
129 drm_unset_busid(dev
, master
);
131 if (dev
->driver
->set_busid
) {
132 ret
= dev
->driver
->set_busid(dev
, master
);
134 drm_unset_busid(dev
, master
);
138 if (WARN(dev
->unique
== NULL
,
139 "No drm_driver.set_busid() implementation provided by "
140 "%ps. Use drm_dev_set_unique() to set the unique "
141 "name explicitly.", dev
->driver
))
144 master
->unique
= kstrdup(dev
->unique
, GFP_KERNEL
);
146 master
->unique_len
= strlen(dev
->unique
);
153 * Get client information.
155 * \param inode device inode.
156 * \param file_priv DRM file private.
157 * \param cmd command.
158 * \param arg user argument, pointing to a drm_client structure.
160 * \return zero on success or a negative number on failure.
162 * Searches for the client with the specified index and copies its information
165 static int drm_getclient(struct drm_device
*dev
, void *data
,
166 struct drm_file
*file_priv
)
168 struct drm_client
*client
= data
;
171 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
172 * not breaking completely. Userspace tools stop enumerating one they
173 * get -EINVAL, hence this is the return value we need to hand back for
174 * no clients tracked.
176 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
177 * attempt to figure out whether they're authenticated or not. Since
178 * that's the only thing they care about, give it to the directly
179 * instead of walking one giant list.
181 if (client
->idx
== 0) {
182 client
->auth
= file_priv
->authenticated
;
183 client
->pid
= pid_vnr(file_priv
->pid
);
184 client
->uid
= from_kuid_munged(current_user_ns(),
196 * Get statistics information.
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_stats structure.
203 * \return zero on success or a negative number on failure.
205 static int drm_getstats(struct drm_device
*dev
, void *data
,
206 struct drm_file
*file_priv
)
208 struct drm_stats
*stats
= data
;
210 /* Clear stats to prevent userspace from eating its stack garbage. */
211 memset(stats
, 0, sizeof(*stats
));
217 * Get device/driver capabilities
219 static int drm_getcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
221 struct drm_get_cap
*req
= data
;
224 switch (req
->capability
) {
225 case DRM_CAP_DUMB_BUFFER
:
226 if (dev
->driver
->dumb_create
)
229 case DRM_CAP_VBLANK_HIGH_CRTC
:
232 case DRM_CAP_DUMB_PREFERRED_DEPTH
:
233 req
->value
= dev
->mode_config
.preferred_depth
;
235 case DRM_CAP_DUMB_PREFER_SHADOW
:
236 req
->value
= dev
->mode_config
.prefer_shadow
;
239 req
->value
|= dev
->driver
->prime_fd_to_handle
? DRM_PRIME_CAP_IMPORT
: 0;
240 req
->value
|= dev
->driver
->prime_handle_to_fd
? DRM_PRIME_CAP_EXPORT
: 0;
242 case DRM_CAP_TIMESTAMP_MONOTONIC
:
243 req
->value
= drm_timestamp_monotonic
;
245 case DRM_CAP_ASYNC_PAGE_FLIP
:
246 req
->value
= dev
->mode_config
.async_page_flip
;
248 case DRM_CAP_CURSOR_WIDTH
:
249 if (dev
->mode_config
.cursor_width
)
250 req
->value
= dev
->mode_config
.cursor_width
;
254 case DRM_CAP_CURSOR_HEIGHT
:
255 if (dev
->mode_config
.cursor_height
)
256 req
->value
= dev
->mode_config
.cursor_height
;
260 case DRM_CAP_ADDFB2_MODIFIERS
:
261 req
->value
= dev
->mode_config
.allow_fb_modifiers
;
270 * Set device/driver capabilities
273 drm_setclientcap(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
275 struct drm_set_client_cap
*req
= data
;
277 switch (req
->capability
) {
278 case DRM_CLIENT_CAP_STEREO_3D
:
281 file_priv
->stereo_allowed
= req
->value
;
283 case DRM_CLIENT_CAP_UNIVERSAL_PLANES
:
286 file_priv
->universal_planes
= req
->value
;
288 case DRM_CLIENT_CAP_ATOMIC
:
289 if (!drm_core_check_feature(dev
, DRIVER_ATOMIC
))
293 file_priv
->atomic
= req
->value
;
294 file_priv
->universal_planes
= req
->value
;
306 * \param inode device inode.
307 * \param file_priv DRM file private.
308 * \param cmd command.
309 * \param arg user argument, pointing to a drm_lock structure.
310 * \return zero on success or negative number on failure.
312 * Sets the requested interface version
314 static int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
316 struct drm_set_version
*sv
= data
;
317 int if_version
, retcode
= 0;
319 if (sv
->drm_di_major
!= -1) {
320 if (sv
->drm_di_major
!= DRM_IF_MAJOR
||
321 sv
->drm_di_minor
< 0 || sv
->drm_di_minor
> DRM_IF_MINOR
) {
325 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
327 dev
->if_version
= max(if_version
, dev
->if_version
);
328 if (sv
->drm_di_minor
>= 1) {
330 * Version 1.1 includes tying of DRM to specific device
331 * Version 1.4 has proper PCI domain support
333 retcode
= drm_set_busid(dev
, file_priv
);
339 if (sv
->drm_dd_major
!= -1) {
340 if (sv
->drm_dd_major
!= dev
->driver
->major
||
341 sv
->drm_dd_minor
< 0 || sv
->drm_dd_minor
>
342 dev
->driver
->minor
) {
349 sv
->drm_di_major
= DRM_IF_MAJOR
;
350 sv
->drm_di_minor
= DRM_IF_MINOR
;
351 sv
->drm_dd_major
= dev
->driver
->major
;
352 sv
->drm_dd_minor
= dev
->driver
->minor
;
358 * drm_noop - DRM no-op ioctl implemntation
359 * @dev: DRM device for the ioctl
360 * @data: data pointer for the ioctl
361 * @file_priv: DRM file for the ioctl call
363 * This no-op implementation for drm ioctls is useful for deprecated
364 * functionality where we can't return a failure code because existing userspace
365 * checks the result of the ioctl, but doesn't care about the action.
367 * Always returns successfully with 0.
369 int drm_noop(struct drm_device
*dev
, void *data
,
370 struct drm_file
*file_priv
)
375 EXPORT_SYMBOL(drm_noop
);
378 * drm_invalid_op - DRM invalid ioctl implemntation
379 * @dev: DRM device for the ioctl
380 * @data: data pointer for the ioctl
381 * @file_priv: DRM file for the ioctl call
383 * This no-op implementation for drm ioctls is useful for deprecated
384 * functionality where we really don't want to allow userspace to call the ioctl
385 * any more. This is the case for old ums interfaces for drivers that
386 * transitioned to kms gradually and so kept the old legacy tables around. This
387 * only applies to radeon and i915 kms drivers, other drivers shouldn't need to
390 * Always fails with a return value of -EINVAL.
392 int drm_invalid_op(struct drm_device
*dev
, void *data
,
393 struct drm_file
*file_priv
)
397 EXPORT_SYMBOL(drm_invalid_op
);
400 * Copy and IOCTL return string to user space
402 static int drm_copy_field(char __user
*buf
, size_t *buf_len
, const char *value
)
406 /* don't overflow userbuf */
411 /* let userspace know exact length of driver value (which could be
412 * larger than the userspace-supplied buffer) */
413 *buf_len
= strlen(value
);
415 /* finally, try filling in the userbuf */
417 if (copy_to_user(buf
, value
, len
))
423 * Get version information
425 * \param inode device inode.
426 * \param filp file pointer.
427 * \param cmd command.
428 * \param arg user argument, pointing to a drm_version structure.
429 * \return zero on success or negative number on failure.
431 * Fills in the version information in \p arg.
433 static int drm_version(struct drm_device
*dev
, void *data
,
434 struct drm_file
*file_priv
)
436 struct drm_version
*version
= data
;
439 version
->version_major
= dev
->driver
->major
;
440 version
->version_minor
= dev
->driver
->minor
;
441 version
->version_patchlevel
= dev
->driver
->patchlevel
;
442 err
= drm_copy_field(version
->name
, &version
->name_len
,
445 err
= drm_copy_field(version
->date
, &version
->date_len
,
448 err
= drm_copy_field(version
->desc
, &version
->desc_len
,
455 * drm_ioctl_permit - Check ioctl permissions against caller
457 * @flags: ioctl permission flags.
458 * @file_priv: Pointer to struct drm_file identifying the caller.
460 * Checks whether the caller is allowed to run an ioctl with the
461 * indicated permissions. If so, returns zero. Otherwise returns an
462 * error code suitable for ioctl return.
464 int drm_ioctl_permit(u32 flags
, struct drm_file
*file_priv
)
466 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
467 if (unlikely((flags
& DRM_ROOT_ONLY
) && !capable(CAP_SYS_ADMIN
)))
470 /* AUTH is only for authenticated or render client */
471 if (unlikely((flags
& DRM_AUTH
) && !drm_is_render_client(file_priv
) &&
472 !file_priv
->authenticated
))
475 /* MASTER is only for master or control clients */
476 if (unlikely((flags
& DRM_MASTER
) && !file_priv
->is_master
&&
477 !drm_is_control_client(file_priv
)))
480 /* Control clients must be explicitly allowed */
481 if (unlikely(!(flags
& DRM_CONTROL_ALLOW
) &&
482 drm_is_control_client(file_priv
)))
485 /* Render clients must be explicitly allowed */
486 if (unlikely(!(flags
& DRM_RENDER_ALLOW
) &&
487 drm_is_render_client(file_priv
)))
492 EXPORT_SYMBOL(drm_ioctl_permit
);
494 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
495 [DRM_IOCTL_NR(ioctl)] = { \
503 static const struct drm_ioctl_desc drm_ioctls
[] = {
504 DRM_IOCTL_DEF(DRM_IOCTL_VERSION
, drm_version
,
505 DRM_UNLOCKED
|DRM_RENDER_ALLOW
|DRM_CONTROL_ALLOW
),
506 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE
, drm_getunique
, 0),
507 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC
, drm_getmagic
, 0),
508 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID
, drm_irq_by_busid
, DRM_MASTER
|DRM_ROOT_ONLY
),
509 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP
, drm_legacy_getmap_ioctl
, DRM_UNLOCKED
),
510 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT
, drm_getclient
, DRM_UNLOCKED
),
511 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS
, drm_getstats
, DRM_UNLOCKED
),
512 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP
, drm_getcap
, DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
513 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP
, drm_setclientcap
, 0),
514 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION
, drm_setversion
, DRM_MASTER
),
516 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE
, drm_setunique
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
517 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
518 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
519 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC
, drm_authmagic
, DRM_AUTH
|DRM_MASTER
),
521 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP
, drm_legacy_addmap_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
522 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP
, drm_legacy_rmmap_ioctl
, DRM_AUTH
),
524 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX
, drm_legacy_setsareactx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
525 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX
, drm_legacy_getsareactx
, DRM_AUTH
),
527 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER
, drm_setmaster_ioctl
, DRM_ROOT_ONLY
),
528 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER
, drm_dropmaster_ioctl
, DRM_ROOT_ONLY
),
530 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX
, drm_legacy_addctx
, DRM_AUTH
|DRM_ROOT_ONLY
),
531 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX
, drm_legacy_rmctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
532 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
533 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX
, drm_legacy_getctx
, DRM_AUTH
),
534 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX
, drm_legacy_switchctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
535 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX
, drm_legacy_newctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
536 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX
, drm_legacy_resctx
, DRM_AUTH
),
538 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
539 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
541 DRM_IOCTL_DEF(DRM_IOCTL_LOCK
, drm_legacy_lock
, DRM_AUTH
),
542 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK
, drm_legacy_unlock
, DRM_AUTH
),
544 DRM_IOCTL_DEF(DRM_IOCTL_FINISH
, drm_noop
, DRM_AUTH
),
546 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS
, drm_legacy_addbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
547 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS
, drm_legacy_markbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
548 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS
, drm_legacy_infobufs
, DRM_AUTH
),
549 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS
, drm_legacy_mapbufs
, DRM_AUTH
),
550 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS
, drm_legacy_freebufs
, DRM_AUTH
),
551 DRM_IOCTL_DEF(DRM_IOCTL_DMA
, drm_legacy_dma_ioctl
, DRM_AUTH
),
553 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL
, drm_control
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
555 #if IS_ENABLED(CONFIG_AGP)
556 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE
, drm_agp_acquire_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
557 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE
, drm_agp_release_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
558 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE
, drm_agp_enable_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
559 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO
, drm_agp_info_ioctl
, DRM_AUTH
),
560 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC
, drm_agp_alloc_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
561 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE
, drm_agp_free_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
562 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND
, drm_agp_bind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
563 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND
, drm_agp_unbind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
566 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC
, drm_legacy_sg_alloc
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
567 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE
, drm_legacy_sg_free
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
569 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK
, drm_wait_vblank
, DRM_UNLOCKED
),
571 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL
, drm_modeset_ctl
, 0),
573 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
575 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE
, drm_gem_close_ioctl
, DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
576 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK
, drm_gem_flink_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
577 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN
, drm_gem_open_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
579 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES
, drm_mode_getresources
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
581 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD
, drm_prime_handle_to_fd_ioctl
, DRM_AUTH
|DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
582 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE
, drm_prime_fd_to_handle_ioctl
, DRM_AUTH
|DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
584 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES
, drm_mode_getplane_res
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
585 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC
, drm_mode_getcrtc
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
586 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC
, drm_mode_setcrtc
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
587 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE
, drm_mode_getplane
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
588 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE
, drm_mode_setplane
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
589 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR
, drm_mode_cursor_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
590 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA
, drm_mode_gamma_get_ioctl
, DRM_UNLOCKED
),
591 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA
, drm_mode_gamma_set_ioctl
, DRM_MASTER
|DRM_UNLOCKED
),
592 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER
, drm_mode_getencoder
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
593 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR
, drm_mode_getconnector
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
594 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE
, drm_noop
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
595 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE
, drm_noop
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
596 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY
, drm_mode_getproperty_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
597 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY
, drm_mode_connector_property_set_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
598 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB
, drm_mode_getblob_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
599 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB
, drm_mode_getfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
600 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB
, drm_mode_addfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
601 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2
, drm_mode_addfb2
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
602 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB
, drm_mode_rmfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
603 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP
, drm_mode_page_flip_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
604 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB
, drm_mode_dirtyfb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
605 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB
, drm_mode_create_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
606 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB
, drm_mode_mmap_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
607 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB
, drm_mode_destroy_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES
, drm_mode_obj_get_properties_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY
, drm_mode_obj_set_property_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2
, drm_mode_cursor2_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC
, drm_mode_atomic_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB
, drm_mode_createblob_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB
, drm_mode_destroyblob_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
616 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
619 * drm_ioctl - ioctl callback implementation for DRM drivers
620 * @filp: file this ioctl is called on
621 * @cmd: ioctl cmd number
622 * @arg: user argument
624 * Looks up the ioctl function in the ::ioctls table, checking for root
625 * previleges if so required, and dispatches to the respective function.
628 * Zero on success, negative error code on failure.
630 long drm_ioctl(struct file
*filp
,
631 unsigned int cmd
, unsigned long arg
)
633 struct drm_file
*file_priv
= filp
->private_data
;
634 struct drm_device
*dev
;
635 const struct drm_ioctl_desc
*ioctl
= NULL
;
637 unsigned int nr
= DRM_IOCTL_NR(cmd
);
638 int retcode
= -EINVAL
;
639 char stack_kdata
[128];
641 unsigned int usize
, asize
, drv_size
;
642 bool is_driver_ioctl
;
644 dev
= file_priv
->minor
->dev
;
646 if (drm_device_is_unplugged(dev
))
649 is_driver_ioctl
= nr
>= DRM_COMMAND_BASE
&& nr
< DRM_COMMAND_END
;
651 if (is_driver_ioctl
) {
653 if (nr
- DRM_COMMAND_BASE
>= dev
->driver
->num_ioctls
)
655 ioctl
= &dev
->driver
->ioctls
[nr
- DRM_COMMAND_BASE
];
658 if (nr
>= DRM_CORE_IOCTL_COUNT
)
660 ioctl
= &drm_ioctls
[nr
];
663 drv_size
= _IOC_SIZE(ioctl
->cmd
);
664 usize
= _IOC_SIZE(cmd
);
665 asize
= max(usize
, drv_size
);
668 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
669 task_pid_nr(current
),
670 (long)old_encode_dev(file_priv
->minor
->kdev
->devt
),
671 file_priv
->authenticated
, ioctl
->name
);
673 /* Do not trust userspace, use our own definition */
676 if (unlikely(!func
)) {
677 DRM_DEBUG("no function\n");
682 retcode
= drm_ioctl_permit(ioctl
->flags
, file_priv
);
683 if (unlikely(retcode
))
686 if (cmd
& (IOC_IN
| IOC_OUT
)) {
687 if (asize
<= sizeof(stack_kdata
)) {
690 kdata
= kmalloc(asize
, GFP_KERNEL
);
697 memset(kdata
+ usize
, 0, asize
- usize
);
701 if (copy_from_user(kdata
, (void __user
*)arg
,
706 } else if (cmd
& IOC_OUT
) {
707 memset(kdata
, 0, usize
);
710 /* Enforce sane locking for kms driver ioctls. Core ioctls are
711 * too messy still. */
712 if ((drm_core_check_feature(dev
, DRIVER_MODESET
) && is_driver_ioctl
) ||
713 (ioctl
->flags
& DRM_UNLOCKED
))
714 retcode
= func(dev
, kdata
, file_priv
);
716 mutex_lock(&drm_global_mutex
);
717 retcode
= func(dev
, kdata
, file_priv
);
718 mutex_unlock(&drm_global_mutex
);
722 if (copy_to_user((void __user
*)arg
, kdata
,
729 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
730 task_pid_nr(current
),
731 (long)old_encode_dev(file_priv
->minor
->kdev
->devt
),
732 file_priv
->authenticated
, cmd
, nr
);
734 if (kdata
!= stack_kdata
)
737 DRM_DEBUG("ret = %d\n", retcode
);
740 EXPORT_SYMBOL(drm_ioctl
);
743 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
745 * @flags: where to return the ioctl permission flags
747 * This ioctl is only used by the vmwgfx driver to augment the access checks
748 * done by the drm core and insofar a pretty decent layering violation. This
749 * shouldn't be used by any drivers.
752 * True if the @nr corresponds to a DRM core ioctl numer, false otherwise.
754 bool drm_ioctl_flags(unsigned int nr
, unsigned int *flags
)
756 if (nr
>= DRM_COMMAND_BASE
&& nr
< DRM_COMMAND_END
)
759 if (nr
>= DRM_CORE_IOCTL_COUNT
)
762 *flags
= drm_ioctls
[nr
].flags
;
765 EXPORT_SYMBOL(drm_ioctl_flags
);