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>
43 static int drm_version(struct drm_device
*dev
, void *data
,
44 struct drm_file
*file_priv
);
49 * \param inode device inode.
50 * \param file_priv DRM file private.
52 * \param arg user argument, pointing to a drm_unique structure.
53 * \return zero on success or a negative number on failure.
55 * Copies the bus id from drm_device::unique into user space.
57 static int drm_getunique(struct drm_device
*dev
, void *data
,
58 struct drm_file
*file_priv
)
60 struct drm_unique
*u
= data
;
61 struct drm_master
*master
= file_priv
->master
;
63 if (u
->unique_len
>= master
->unique_len
) {
64 if (copy_to_user(u
->unique
, master
->unique
, master
->unique_len
))
67 u
->unique_len
= master
->unique_len
;
73 drm_unset_busid(struct drm_device
*dev
,
74 struct drm_master
*master
)
76 kfree(master
->unique
);
77 master
->unique
= NULL
;
78 master
->unique_len
= 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 static 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
->set_busid
) {
135 ret
= dev
->driver
->set_busid(dev
, master
);
137 drm_unset_busid(dev
, master
);
141 if (WARN(dev
->unique
== NULL
,
142 "No drm_driver.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 static 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 static 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 static 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 static 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
:
347 file_priv
->universal_planes
= req
->value
;
349 case DRM_CLIENT_CAP_ATOMIC
:
350 /* for now, hide behind experimental drm.atomic moduleparam */
353 if (!drm_core_check_feature(dev
, DRIVER_ATOMIC
))
357 file_priv
->atomic
= req
->value
;
358 file_priv
->universal_planes
= req
->value
;
370 * \param inode device inode.
371 * \param file_priv DRM file private.
372 * \param cmd command.
373 * \param arg user argument, pointing to a drm_lock structure.
374 * \return zero on success or negative number on failure.
376 * Sets the requested interface version
378 static int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
380 struct drm_set_version
*sv
= data
;
381 int if_version
, retcode
= 0;
383 if (sv
->drm_di_major
!= -1) {
384 if (sv
->drm_di_major
!= DRM_IF_MAJOR
||
385 sv
->drm_di_minor
< 0 || sv
->drm_di_minor
> DRM_IF_MINOR
) {
389 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
391 dev
->if_version
= max(if_version
, dev
->if_version
);
392 if (sv
->drm_di_minor
>= 1) {
394 * Version 1.1 includes tying of DRM to specific device
395 * Version 1.4 has proper PCI domain support
397 retcode
= drm_set_busid(dev
, file_priv
);
403 if (sv
->drm_dd_major
!= -1) {
404 if (sv
->drm_dd_major
!= dev
->driver
->major
||
405 sv
->drm_dd_minor
< 0 || sv
->drm_dd_minor
>
406 dev
->driver
->minor
) {
413 sv
->drm_di_major
= DRM_IF_MAJOR
;
414 sv
->drm_di_minor
= DRM_IF_MINOR
;
415 sv
->drm_dd_major
= dev
->driver
->major
;
416 sv
->drm_dd_minor
= dev
->driver
->minor
;
422 int drm_noop(struct drm_device
*dev
, void *data
,
423 struct drm_file
*file_priv
)
428 EXPORT_SYMBOL(drm_noop
);
431 * Copy and IOCTL return string to user space
433 static int drm_copy_field(char __user
*buf
, size_t *buf_len
, const char *value
)
437 /* don't overflow userbuf */
442 /* let userspace know exact length of driver value (which could be
443 * larger than the userspace-supplied buffer) */
444 *buf_len
= strlen(value
);
446 /* finally, try filling in the userbuf */
448 if (copy_to_user(buf
, value
, len
))
454 * Get version information
456 * \param inode device inode.
457 * \param filp file pointer.
458 * \param cmd command.
459 * \param arg user argument, pointing to a drm_version structure.
460 * \return zero on success or negative number on failure.
462 * Fills in the version information in \p arg.
464 static int drm_version(struct drm_device
*dev
, void *data
,
465 struct drm_file
*file_priv
)
467 struct drm_version
*version
= data
;
470 version
->version_major
= dev
->driver
->major
;
471 version
->version_minor
= dev
->driver
->minor
;
472 version
->version_patchlevel
= dev
->driver
->patchlevel
;
473 err
= drm_copy_field(version
->name
, &version
->name_len
,
476 err
= drm_copy_field(version
->date
, &version
->date_len
,
479 err
= drm_copy_field(version
->desc
, &version
->desc_len
,
486 * drm_ioctl_permit - Check ioctl permissions against caller
488 * @flags: ioctl permission flags.
489 * @file_priv: Pointer to struct drm_file identifying the caller.
491 * Checks whether the caller is allowed to run an ioctl with the
492 * indicated permissions. If so, returns zero. Otherwise returns an
493 * error code suitable for ioctl return.
495 static int drm_ioctl_permit(u32 flags
, struct drm_file
*file_priv
)
497 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
498 if (unlikely((flags
& DRM_ROOT_ONLY
) && !capable(CAP_SYS_ADMIN
)))
501 /* AUTH is only for authenticated or render client */
502 if (unlikely((flags
& DRM_AUTH
) && !drm_is_render_client(file_priv
) &&
503 !file_priv
->authenticated
))
506 /* MASTER is only for master or control clients */
507 if (unlikely((flags
& DRM_MASTER
) && !file_priv
->is_master
&&
508 !drm_is_control_client(file_priv
)))
511 /* Control clients must be explicitly allowed */
512 if (unlikely(!(flags
& DRM_CONTROL_ALLOW
) &&
513 drm_is_control_client(file_priv
)))
516 /* Render clients must be explicitly allowed */
517 if (unlikely(!(flags
& DRM_RENDER_ALLOW
) &&
518 drm_is_render_client(file_priv
)))
524 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
525 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
528 static const struct drm_ioctl_desc drm_ioctls
[] = {
529 DRM_IOCTL_DEF(DRM_IOCTL_VERSION
, drm_version
, DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
530 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE
, drm_getunique
, 0),
531 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC
, drm_getmagic
, 0),
532 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID
, drm_irq_by_busid
, DRM_MASTER
|DRM_ROOT_ONLY
),
533 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP
, drm_getmap
, DRM_UNLOCKED
),
534 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT
, drm_getclient
, DRM_UNLOCKED
),
535 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS
, drm_getstats
, DRM_UNLOCKED
),
536 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP
, drm_getcap
, DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
537 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP
, drm_setclientcap
, 0),
538 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION
, drm_setversion
, DRM_MASTER
),
540 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE
, drm_setunique
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
541 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
542 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
543 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC
, drm_authmagic
, DRM_AUTH
|DRM_MASTER
),
545 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP
, drm_legacy_addmap_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
546 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP
, drm_legacy_rmmap_ioctl
, DRM_AUTH
),
548 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX
, drm_legacy_setsareactx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
549 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX
, drm_legacy_getsareactx
, DRM_AUTH
),
551 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER
, drm_setmaster_ioctl
, DRM_ROOT_ONLY
),
552 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER
, drm_dropmaster_ioctl
, DRM_ROOT_ONLY
),
554 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX
, drm_legacy_addctx
, DRM_AUTH
|DRM_ROOT_ONLY
),
555 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX
, drm_legacy_rmctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
556 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
557 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX
, drm_legacy_getctx
, DRM_AUTH
),
558 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX
, drm_legacy_switchctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
559 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX
, drm_legacy_newctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
560 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX
, drm_legacy_resctx
, DRM_AUTH
),
562 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
563 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
565 DRM_IOCTL_DEF(DRM_IOCTL_LOCK
, drm_legacy_lock
, DRM_AUTH
),
566 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK
, drm_legacy_unlock
, DRM_AUTH
),
568 DRM_IOCTL_DEF(DRM_IOCTL_FINISH
, drm_noop
, DRM_AUTH
),
570 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS
, drm_legacy_addbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
571 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS
, drm_legacy_markbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
572 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS
, drm_legacy_infobufs
, DRM_AUTH
),
573 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS
, drm_legacy_mapbufs
, DRM_AUTH
),
574 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS
, drm_legacy_freebufs
, DRM_AUTH
),
575 DRM_IOCTL_DEF(DRM_IOCTL_DMA
, drm_legacy_dma_ioctl
, DRM_AUTH
),
577 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL
, drm_control
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
580 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE
, drm_agp_acquire_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
581 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE
, drm_agp_release_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
582 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE
, drm_agp_enable_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
583 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO
, drm_agp_info_ioctl
, DRM_AUTH
),
584 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC
, drm_agp_alloc_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
585 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE
, drm_agp_free_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
586 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND
, drm_agp_bind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
587 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND
, drm_agp_unbind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
590 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC
, drm_legacy_sg_alloc
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
591 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE
, drm_legacy_sg_free
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
593 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK
, drm_wait_vblank
, DRM_UNLOCKED
),
595 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL
, drm_modeset_ctl
, 0),
597 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
599 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE
, drm_gem_close_ioctl
, DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
600 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK
, drm_gem_flink_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
601 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN
, drm_gem_open_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
603 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES
, drm_mode_getresources
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
605 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD
, drm_prime_handle_to_fd_ioctl
, DRM_AUTH
|DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
606 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE
, drm_prime_fd_to_handle_ioctl
, DRM_AUTH
|DRM_UNLOCKED
|DRM_RENDER_ALLOW
),
608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES
, drm_mode_getplane_res
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC
, drm_mode_getcrtc
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC
, drm_mode_setcrtc
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE
, drm_mode_getplane
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE
, drm_mode_setplane
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR
, drm_mode_cursor_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
614 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA
, drm_mode_gamma_get_ioctl
, DRM_UNLOCKED
),
615 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA
, drm_mode_gamma_set_ioctl
, DRM_MASTER
|DRM_UNLOCKED
),
616 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER
, drm_mode_getencoder
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
617 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR
, drm_mode_getconnector
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
618 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE
, drm_noop
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
619 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE
, drm_noop
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
620 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY
, drm_mode_getproperty_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
621 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY
, drm_mode_connector_property_set_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
622 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB
, drm_mode_getblob_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
623 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB
, drm_mode_getfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
624 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB
, drm_mode_addfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
625 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2
, drm_mode_addfb2
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
626 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB
, drm_mode_rmfb
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
627 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP
, drm_mode_page_flip_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
628 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB
, drm_mode_dirtyfb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
629 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB
, drm_mode_create_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
630 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB
, drm_mode_mmap_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
631 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB
, drm_mode_destroy_dumb_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
632 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES
, drm_mode_obj_get_properties_ioctl
, DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
633 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY
, drm_mode_obj_set_property_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
634 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2
, drm_mode_cursor2_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
635 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC
, drm_mode_atomic_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
638 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
641 * Called whenever a process performs an ioctl on /dev/drm.
643 * \param inode device inode.
644 * \param file_priv DRM file private.
645 * \param cmd command.
646 * \param arg user argument.
647 * \return zero on success or negative number on failure.
649 * Looks up the ioctl function in the ::ioctls table, checking for root
650 * previleges if so required, and dispatches to the respective function.
652 long drm_ioctl(struct file
*filp
,
653 unsigned int cmd
, unsigned long arg
)
655 struct drm_file
*file_priv
= filp
->private_data
;
656 struct drm_device
*dev
;
657 const struct drm_ioctl_desc
*ioctl
= NULL
;
659 unsigned int nr
= DRM_IOCTL_NR(cmd
);
660 int retcode
= -EINVAL
;
661 char stack_kdata
[128];
663 unsigned int usize
, asize
;
665 dev
= file_priv
->minor
->dev
;
667 if (drm_device_is_unplugged(dev
))
670 if ((nr
>= DRM_CORE_IOCTL_COUNT
) &&
671 ((nr
< DRM_COMMAND_BASE
) || (nr
>= DRM_COMMAND_END
)))
673 if ((nr
>= DRM_COMMAND_BASE
) && (nr
< DRM_COMMAND_END
) &&
674 (nr
< DRM_COMMAND_BASE
+ dev
->driver
->num_ioctls
)) {
676 ioctl
= &dev
->driver
->ioctls
[nr
- DRM_COMMAND_BASE
];
677 drv_size
= _IOC_SIZE(ioctl
->cmd_drv
);
678 usize
= asize
= _IOC_SIZE(cmd
);
679 if (drv_size
> asize
)
681 cmd
= ioctl
->cmd_drv
;
683 else if ((nr
>= DRM_COMMAND_END
) || (nr
< DRM_COMMAND_BASE
)) {
686 ioctl
= &drm_ioctls
[nr
];
688 drv_size
= _IOC_SIZE(ioctl
->cmd
);
689 usize
= asize
= _IOC_SIZE(cmd
);
690 if (drv_size
> asize
)
697 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
698 task_pid_nr(current
),
699 (long)old_encode_dev(file_priv
->minor
->kdev
->devt
),
700 file_priv
->authenticated
, ioctl
->name
);
702 /* Do not trust userspace, use our own definition */
705 if (unlikely(!func
)) {
706 DRM_DEBUG("no function\n");
711 retcode
= drm_ioctl_permit(ioctl
->flags
, file_priv
);
712 if (unlikely(retcode
))
715 if (cmd
& (IOC_IN
| IOC_OUT
)) {
716 if (asize
<= sizeof(stack_kdata
)) {
719 kdata
= kmalloc(asize
, GFP_KERNEL
);
726 memset(kdata
+ usize
, 0, asize
- usize
);
730 if (copy_from_user(kdata
, (void __user
*)arg
,
735 } else if (cmd
& IOC_OUT
) {
736 memset(kdata
, 0, usize
);
739 if (ioctl
->flags
& DRM_UNLOCKED
)
740 retcode
= func(dev
, kdata
, file_priv
);
742 mutex_lock(&drm_global_mutex
);
743 retcode
= func(dev
, kdata
, file_priv
);
744 mutex_unlock(&drm_global_mutex
);
748 if (copy_to_user((void __user
*)arg
, kdata
,
755 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
756 task_pid_nr(current
),
757 (long)old_encode_dev(file_priv
->minor
->kdev
->devt
),
758 file_priv
->authenticated
, cmd
, nr
);
760 if (kdata
!= stack_kdata
)
763 DRM_DEBUG("ret = %d\n", retcode
);
766 EXPORT_SYMBOL(drm_ioctl
);
769 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
772 * @flags: Where to return the ioctl permission flags
774 bool drm_ioctl_flags(unsigned int nr
, unsigned int *flags
)
776 if ((nr
>= DRM_COMMAND_END
&& nr
< DRM_CORE_IOCTL_COUNT
) ||
777 (nr
< DRM_COMMAND_BASE
)) {
778 *flags
= drm_ioctls
[nr
].flags
;
784 EXPORT_SYMBOL(drm_ioctl_flags
);