2005-04-17 06:20:36 +08:00
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/**
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2005-09-25 12:28:13 +08:00
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* \file drm_drv.c
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2005-04-17 06:20:36 +08:00
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* Generic driver template
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*
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* To use this template, you must at least define the following (samples
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* given for the MGA driver):
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*
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* \code
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* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
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*
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* #define DRIVER_NAME "mga"
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* #define DRIVER_DESC "Matrox G200/G400"
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* #define DRIVER_DATE "20001127"
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*
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* #define drm_x mga_##x
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* \endcode
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*/
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/*
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* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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2009-02-18 09:08:49 +08:00
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#include <linux/debugfs.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
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#include <linux/slab.h>
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2011-08-31 06:16:33 +08:00
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#include <linux/export.h>
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2012-10-03 01:01:07 +08:00
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#include <drm/drmP.h>
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#include <drm/drm_core.h>
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2005-04-17 06:20:36 +08:00
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2009-02-18 09:08:49 +08:00
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2007-09-03 10:06:45 +08:00
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static int drm_version(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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2005-07-07 19:03:38 +08:00
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2010-08-14 18:20:34 +08:00
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#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
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drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
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[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
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2010-08-14 18:20:34 +08:00
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2005-04-17 06:20:36 +08:00
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/** Ioctl table */
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2013-04-26 01:09:19 +08:00
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static const struct drm_ioctl_desc drm_ioctls[] = {
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2013-10-28 17:55:49 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
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drm: make DRM_UNLOCKED ioctls with their own mutex
drm_getclient, drm_getstats and drm_getmap (with a few minor
adjustments) do not need global mutex, so fix that and
make the said ioctls DRM_UNLOCKED. Details:
drm_getclient: the only thing that should be protected here
is dev->filelist and that is already protected everywhere with
dev->struct_mutex.
drm_getstats: there is no need for any mutex here because the
loop runs through quasi-static (set at load time only)
data, and the actual count access is done with atomic_read()
drm_getmap already uses dev->struct_mutex to protect
dev->maplist, which also used to protect the same structure
everywhere else except at three places:
* drm_getsarea, which doesn't grab *any* mutex before
touching dev->maplist (so no drm_global_mutex doesn't help
here either; different issue for a different patch).
However, drivers seem to call it only at
initialization time so it probably doesn't matter
* drm_master_destroy, which is called from drm_master_put,
which in turn is protected with dev->struct_mutex
everywhere else in drm module, so we are good here too.
* drm_getsareactx, which releases the dev->struct_mutex
too early, but this patch includes the fix for that.
v2: * incorporate comments received from Daniel Vetter
* include the (long) explanation above to make it clear what
we are doing (and why), also at Daniel Vetter's request
* tighten up mutex grab/release locations to only
encompass real critical sections, rather than some
random code around them
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-10-29 05:43:28 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
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drm: implement experimental render nodes
Render nodes provide an API for userspace to use non-privileged GPU
commands without any running DRM-Master. It is useful for offscreen
rendering, GPGPU clients, and normal render clients which do not perform
modesetting.
Compared to legacy clients, render clients no longer need any
authentication to perform client ioctls. Instead, user-space controls
render/client access to GPUs via filesystem access-modes on the
render-node. Once a render-node was opened, a client has full access to
the client/render operations on the GPU. However, no modesetting or ioctls
that affect global state are allowed on render nodes.
To prevent privilege-escalation, drivers must explicitly state that they
support render nodes. They must mark their render-only ioctls as
DRM_RENDER_ALLOW so render clients can use them. Furthermore, they must
support clients without any attached master.
If filesystem access-modes are not enough for fine-grained access control
to render nodes (very unlikely, considering the versaitlity of FS-ACLs),
you may still fall-back to fd-passing from server to client (which allows
arbitrary access-control). However, note that revoking access is
currently impossible and unlikely to get implemented.
Note: Render clients no longer have any associated DRM-Master as they are
supposed to be independent of any server state. DRM core highly depends on
file_priv->master to be non-NULL for modesetting/ctx/etc. commands.
Therefore, drivers must be very careful to not require DRM-Master if they
support DRIVER_RENDER.
So far render-nodes are protected by "drm_rnodes". As long as this
module-parameter is not set to 1, a driver will not create render nodes.
This allows us to experiment with the API a bit before we stabilize it.
v2: drop insecure GEM_FLINK to force use of dmabuf
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-08-26 00:29:00 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
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2013-09-25 23:45:20 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
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2009-08-19 13:51:55 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2009-08-19 13:51:55 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
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2008-11-28 12:22:24 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2013-07-10 20:11:35 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
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2010-08-24 04:53:31 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
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2013-08-08 21:41:29 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
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2005-04-17 06:20:36 +08:00
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2005-04-17 06:20:36 +08:00
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#if __OS_HAS_AGP
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2005-04-17 06:20:36 +08:00
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#endif
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2013-07-10 20:11:50 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2007-09-03 10:06:45 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
2005-04-17 06:20:36 +08:00
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2011-11-01 05:46:18 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
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2006-10-24 21:04:19 +08:00
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2008-10-01 03:14:26 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
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2010-08-24 04:53:31 +08:00
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DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
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2008-07-31 03:06:12 +08:00
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|
drm: implement experimental render nodes
Render nodes provide an API for userspace to use non-privileged GPU
commands without any running DRM-Master. It is useful for offscreen
rendering, GPGPU clients, and normal render clients which do not perform
modesetting.
Compared to legacy clients, render clients no longer need any
authentication to perform client ioctls. Instead, user-space controls
render/client access to GPUs via filesystem access-modes on the
render-node. Once a render-node was opened, a client has full access to
the client/render operations on the GPU. However, no modesetting or ioctls
that affect global state are allowed on render nodes.
To prevent privilege-escalation, drivers must explicitly state that they
support render nodes. They must mark their render-only ioctls as
DRM_RENDER_ALLOW so render clients can use them. Furthermore, they must
support clients without any attached master.
If filesystem access-modes are not enough for fine-grained access control
to render nodes (very unlikely, considering the versaitlity of FS-ACLs),
you may still fall-back to fd-passing from server to client (which allows
arbitrary access-control). However, note that revoking access is
currently impossible and unlikely to get implemented.
Note: Render clients no longer have any associated DRM-Master as they are
supposed to be independent of any server state. DRM core highly depends on
file_priv->master to be non-NULL for modesetting/ctx/etc. commands.
Therefore, drivers must be very careful to not require DRM-Master if they
support DRIVER_RENDER.
So far render-nodes are protected by "drm_rnodes". As long as this
module-parameter is not set to 1, a driver will not create render nodes.
This allows us to experiment with the API a bit before we stabilize it.
v2: drop insecure GEM_FLINK to force use of dmabuf
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-08-26 00:29:00 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
|
|
|
|
2012-01-21 04:11:16 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2011-11-25 23:21:02 +08:00
|
|
|
|
drm: implement experimental render nodes
Render nodes provide an API for userspace to use non-privileged GPU
commands without any running DRM-Master. It is useful for offscreen
rendering, GPGPU clients, and normal render clients which do not perform
modesetting.
Compared to legacy clients, render clients no longer need any
authentication to perform client ioctls. Instead, user-space controls
render/client access to GPUs via filesystem access-modes on the
render-node. Once a render-node was opened, a client has full access to
the client/render operations on the GPU. However, no modesetting or ioctls
that affect global state are allowed on render nodes.
To prevent privilege-escalation, drivers must explicitly state that they
support render nodes. They must mark their render-only ioctls as
DRM_RENDER_ALLOW so render clients can use them. Furthermore, they must
support clients without any attached master.
If filesystem access-modes are not enough for fine-grained access control
to render nodes (very unlikely, considering the versaitlity of FS-ACLs),
you may still fall-back to fd-passing from server to client (which allows
arbitrary access-control). However, note that revoking access is
currently impossible and unlikely to get implemented.
Note: Render clients no longer have any associated DRM-Master as they are
supposed to be independent of any server state. DRM core highly depends on
file_priv->master to be non-NULL for modesetting/ctx/etc. commands.
Therefore, drivers must be very careful to not require DRM-Master if they
support DRIVER_RENDER.
So far render-nodes are protected by "drm_rnodes". As long as this
module-parameter is not set to 1, a driver will not create render nodes.
This allows us to experiment with the API a bit before we stabilize it.
v2: drop insecure GEM_FLINK to force use of dmabuf
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-08-26 00:29:00 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
2011-11-25 23:21:02 +08:00
|
|
|
|
2012-09-13 11:34:08 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-01-21 04:11:16 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-13 11:34:08 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2011-11-15 06:51:27 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-01-21 04:11:16 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
|
2012-01-21 04:11:16 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2013-04-26 22:40:28 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-13 11:34:08 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-13 11:34:08 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-01-21 04:11:16 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-12 02:35:11 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2010-02-03 17:14:35 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2011-02-07 10:16:14 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-12 02:35:11 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-09-13 11:34:08 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2012-05-16 05:09:02 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2013-06-20 09:48:52 +08:00
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
2007-05-08 13:28:15 +08:00
|
|
|
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
/** File operations structure */
|
2007-02-12 16:55:32 +08:00
|
|
|
static const struct file_operations drm_stub_fops = {
|
2005-04-17 06:20:36 +08:00
|
|
|
.owner = THIS_MODULE,
|
llseek: automatically add .llseek fop
All file_operations should get a .llseek operation so we can make
nonseekable_open the default for future file operations without a
.llseek pointer.
The three cases that we can automatically detect are no_llseek, seq_lseek
and default_llseek. For cases where we can we can automatically prove that
the file offset is always ignored, we use noop_llseek, which maintains
the current behavior of not returning an error from a seek.
New drivers should normally not use noop_llseek but instead use no_llseek
and call nonseekable_open at open time. Existing drivers can be converted
to do the same when the maintainer knows for certain that no user code
relies on calling seek on the device file.
The generated code is often incorrectly indented and right now contains
comments that clarify for each added line why a specific variant was
chosen. In the version that gets submitted upstream, the comments will
be gone and I will manually fix the indentation, because there does not
seem to be a way to do that using coccinelle.
Some amount of new code is currently sitting in linux-next that should get
the same modifications, which I will do at the end of the merge window.
Many thanks to Julia Lawall for helping me learn to write a semantic
patch that does all this.
===== begin semantic patch =====
// This adds an llseek= method to all file operations,
// as a preparation for making no_llseek the default.
//
// The rules are
// - use no_llseek explicitly if we do nonseekable_open
// - use seq_lseek for sequential files
// - use default_llseek if we know we access f_pos
// - use noop_llseek if we know we don't access f_pos,
// but we still want to allow users to call lseek
//
@ open1 exists @
identifier nested_open;
@@
nested_open(...)
{
<+...
nonseekable_open(...)
...+>
}
@ open exists@
identifier open_f;
identifier i, f;
identifier open1.nested_open;
@@
int open_f(struct inode *i, struct file *f)
{
<+...
(
nonseekable_open(...)
|
nested_open(...)
)
...+>
}
@ read disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
<+...
(
*off = E
|
*off += E
|
func(..., off, ...)
|
E = *off
)
...+>
}
@ read_no_fpos disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
... when != off
}
@ write @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
<+...
(
*off = E
|
*off += E
|
func(..., off, ...)
|
E = *off
)
...+>
}
@ write_no_fpos @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
... when != off
}
@ fops0 @
identifier fops;
@@
struct file_operations fops = {
...
};
@ has_llseek depends on fops0 @
identifier fops0.fops;
identifier llseek_f;
@@
struct file_operations fops = {
...
.llseek = llseek_f,
...
};
@ has_read depends on fops0 @
identifier fops0.fops;
identifier read_f;
@@
struct file_operations fops = {
...
.read = read_f,
...
};
@ has_write depends on fops0 @
identifier fops0.fops;
identifier write_f;
@@
struct file_operations fops = {
...
.write = write_f,
...
};
@ has_open depends on fops0 @
identifier fops0.fops;
identifier open_f;
@@
struct file_operations fops = {
...
.open = open_f,
...
};
// use no_llseek if we call nonseekable_open
////////////////////////////////////////////
@ nonseekable1 depends on !has_llseek && has_open @
identifier fops0.fops;
identifier nso ~= "nonseekable_open";
@@
struct file_operations fops = {
... .open = nso, ...
+.llseek = no_llseek, /* nonseekable */
};
@ nonseekable2 depends on !has_llseek @
identifier fops0.fops;
identifier open.open_f;
@@
struct file_operations fops = {
... .open = open_f, ...
+.llseek = no_llseek, /* open uses nonseekable */
};
// use seq_lseek for sequential files
/////////////////////////////////////
@ seq depends on !has_llseek @
identifier fops0.fops;
identifier sr ~= "seq_read";
@@
struct file_operations fops = {
... .read = sr, ...
+.llseek = seq_lseek, /* we have seq_read */
};
// use default_llseek if there is a readdir
///////////////////////////////////////////
@ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier readdir_e;
@@
// any other fop is used that changes pos
struct file_operations fops = {
... .readdir = readdir_e, ...
+.llseek = default_llseek, /* readdir is present */
};
// use default_llseek if at least one of read/write touches f_pos
/////////////////////////////////////////////////////////////////
@ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read.read_f;
@@
// read fops use offset
struct file_operations fops = {
... .read = read_f, ...
+.llseek = default_llseek, /* read accesses f_pos */
};
@ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write.write_f;
@@
// write fops use offset
struct file_operations fops = {
... .write = write_f, ...
+ .llseek = default_llseek, /* write accesses f_pos */
};
// Use noop_llseek if neither read nor write accesses f_pos
///////////////////////////////////////////////////////////
@ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
identifier write_no_fpos.write_f;
@@
// write fops use offset
struct file_operations fops = {
...
.write = write_f,
.read = read_f,
...
+.llseek = noop_llseek, /* read and write both use no f_pos */
};
@ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write_no_fpos.write_f;
@@
struct file_operations fops = {
... .write = write_f, ...
+.llseek = noop_llseek, /* write uses no f_pos */
};
@ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
@@
struct file_operations fops = {
... .read = read_f, ...
+.llseek = noop_llseek, /* read uses no f_pos */
};
@ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
@@
struct file_operations fops = {
...
+.llseek = noop_llseek, /* no read or write fn */
};
===== End semantic patch =====
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Julia Lawall <julia@diku.dk>
Cc: Christoph Hellwig <hch@infradead.org>
2010-08-16 00:52:59 +08:00
|
|
|
.open = drm_stub_open,
|
|
|
|
|
.llseek = noop_llseek,
|
2005-04-17 06:20:36 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int __init drm_core_init(void)
|
|
|
|
|
{
|
|
|
|
|
int ret = -ENOMEM;
|
2005-09-25 12:28:13 +08:00
|
|
|
|
2010-03-09 08:56:52 +08:00
|
|
|
drm_global_init();
|
2013-08-08 10:34:48 +08:00
|
|
|
drm_connector_ida_init();
|
2008-04-21 14:47:32 +08:00
|
|
|
idr_init(&drm_minors_idr);
|
2005-09-25 12:28:13 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
|
|
|
|
|
goto err_p1;
|
2005-09-25 12:28:13 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_class = drm_sysfs_create(THIS_MODULE, "drm");
|
|
|
|
|
if (IS_ERR(drm_class)) {
|
2005-09-25 12:28:13 +08:00
|
|
|
printk(KERN_ERR "DRM: Error creating drm class.\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
ret = PTR_ERR(drm_class);
|
|
|
|
|
goto err_p2;
|
|
|
|
|
}
|
|
|
|
|
|
2009-02-18 09:08:49 +08:00
|
|
|
drm_debugfs_root = debugfs_create_dir("dri", NULL);
|
|
|
|
|
if (!drm_debugfs_root) {
|
2009-06-02 14:01:37 +08:00
|
|
|
DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
|
2009-02-18 09:08:49 +08:00
|
|
|
ret = -1;
|
|
|
|
|
goto err_p3;
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_INFO("Initialized %s %d.%d.%d %s\n",
|
|
|
|
|
CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
|
2005-04-17 06:20:36 +08:00
|
|
|
return 0;
|
2007-11-22 12:02:38 +08:00
|
|
|
err_p3:
|
|
|
|
|
drm_sysfs_destroy();
|
|
|
|
|
err_p2:
|
2005-04-17 06:20:36 +08:00
|
|
|
unregister_chrdev(DRM_MAJOR, "drm");
|
2008-04-21 14:47:32 +08:00
|
|
|
|
|
|
|
|
idr_destroy(&drm_minors_idr);
|
2007-11-22 12:02:38 +08:00
|
|
|
err_p1:
|
2005-04-17 06:20:36 +08:00
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
static void __exit drm_core_exit(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2009-02-18 09:08:49 +08:00
|
|
|
debugfs_remove(drm_debugfs_root);
|
2007-11-22 12:02:38 +08:00
|
|
|
drm_sysfs_destroy();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
unregister_chrdev(DRM_MAJOR, "drm");
|
|
|
|
|
|
2013-08-08 10:34:48 +08:00
|
|
|
drm_connector_ida_destroy();
|
2008-04-21 14:47:32 +08:00
|
|
|
idr_destroy(&drm_minors_idr);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
module_init(drm_core_init);
|
|
|
|
|
module_exit(drm_core_exit);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-11-18 06:41:23 +08:00
|
|
|
/**
|
|
|
|
|
* Copy and IOCTL return string to user space
|
|
|
|
|
*/
|
2009-11-18 06:41:24 +08:00
|
|
|
static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
|
|
|
|
|
{
|
|
|
|
|
int len;
|
|
|
|
|
|
|
|
|
|
/* don't overflow userbuf */
|
|
|
|
|
len = strlen(value);
|
|
|
|
|
if (len > *buf_len)
|
|
|
|
|
len = *buf_len;
|
|
|
|
|
|
|
|
|
|
/* let userspace know exact length of driver value (which could be
|
|
|
|
|
* larger than the userspace-supplied buffer) */
|
|
|
|
|
*buf_len = strlen(value);
|
|
|
|
|
|
|
|
|
|
/* finally, try filling in the userbuf */
|
|
|
|
|
if (len && buf)
|
|
|
|
|
if (copy_to_user(buf, value, len))
|
|
|
|
|
return -EFAULT;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
2009-11-18 06:41:23 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/**
|
|
|
|
|
* Get version information
|
|
|
|
|
*
|
|
|
|
|
* \param inode device inode.
|
|
|
|
|
* \param filp file pointer.
|
|
|
|
|
* \param cmd command.
|
|
|
|
|
* \param arg user argument, pointing to a drm_version structure.
|
|
|
|
|
* \return zero on success or negative number on failure.
|
|
|
|
|
*
|
|
|
|
|
* Fills in the version information in \p arg.
|
|
|
|
|
*/
|
2007-09-03 10:06:45 +08:00
|
|
|
static int drm_version(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-09-03 10:06:45 +08:00
|
|
|
struct drm_version *version = data;
|
2009-11-18 06:41:25 +08:00
|
|
|
int err;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2007-09-03 10:06:45 +08:00
|
|
|
version->version_major = dev->driver->major;
|
|
|
|
|
version->version_minor = dev->driver->minor;
|
|
|
|
|
version->version_patchlevel = dev->driver->patchlevel;
|
2009-11-18 06:41:25 +08:00
|
|
|
err = drm_copy_field(version->name, &version->name_len,
|
|
|
|
|
dev->driver->name);
|
|
|
|
|
if (!err)
|
|
|
|
|
err = drm_copy_field(version->date, &version->date_len,
|
|
|
|
|
dev->driver->date);
|
|
|
|
|
if (!err)
|
|
|
|
|
err = drm_copy_field(version->desc, &version->desc_len,
|
|
|
|
|
dev->driver->desc);
|
|
|
|
|
|
|
|
|
|
return err;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2014-03-13 17:30:25 +08:00
|
|
|
/**
|
|
|
|
|
* drm_ioctl_permit - Check ioctl permissions against caller
|
|
|
|
|
*
|
|
|
|
|
* @flags: ioctl permission flags.
|
|
|
|
|
* @file_priv: Pointer to struct drm_file identifying the caller.
|
|
|
|
|
*
|
|
|
|
|
* Checks whether the caller is allowed to run an ioctl with the
|
|
|
|
|
* indicated permissions. If so, returns zero. Otherwise returns an
|
|
|
|
|
* error code suitable for ioctl return.
|
|
|
|
|
*/
|
|
|
|
|
static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
|
|
|
|
|
{
|
|
|
|
|
/* ROOT_ONLY is only for CAP_SYS_ADMIN */
|
|
|
|
|
if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
|
|
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
|
|
/* AUTH is only for authenticated or render client */
|
|
|
|
|
if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
|
|
|
|
|
!file_priv->authenticated))
|
|
|
|
|
return -EACCES;
|
|
|
|
|
|
2014-02-19 21:21:48 +08:00
|
|
|
/* MASTER is only for master or control clients */
|
|
|
|
|
if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
|
|
|
|
|
!drm_is_control_client(file_priv)))
|
2014-03-13 17:30:25 +08:00
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
|
|
/* Control clients must be explicitly allowed */
|
|
|
|
|
if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
|
2014-02-19 21:21:48 +08:00
|
|
|
drm_is_control_client(file_priv)))
|
2014-03-13 17:30:25 +08:00
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
|
|
/* Render clients must be explicitly allowed */
|
|
|
|
|
if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
|
|
|
|
|
drm_is_render_client(file_priv)))
|
|
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-25 12:28:13 +08:00
|
|
|
/**
|
2005-04-17 06:20:36 +08:00
|
|
|
* Called whenever a process performs an ioctl on /dev/drm.
|
|
|
|
|
*
|
|
|
|
|
* \param inode device inode.
|
2007-08-25 18:23:09 +08:00
|
|
|
* \param file_priv DRM file private.
|
2005-04-17 06:20:36 +08:00
|
|
|
* \param cmd command.
|
|
|
|
|
* \param arg user argument.
|
|
|
|
|
* \return zero on success or negative number on failure.
|
|
|
|
|
*
|
|
|
|
|
* Looks up the ioctl function in the ::ioctls table, checking for root
|
|
|
|
|
* previleges if so required, and dispatches to the respective function.
|
|
|
|
|
*/
|
2009-12-17 06:17:09 +08:00
|
|
|
long drm_ioctl(struct file *filp,
|
2005-09-25 12:28:13 +08:00
|
|
|
unsigned int cmd, unsigned long arg)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2007-08-25 18:23:09 +08:00
|
|
|
struct drm_file *file_priv = filp->private_data;
|
2009-12-17 06:17:09 +08:00
|
|
|
struct drm_device *dev;
|
drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
|
|
const struct drm_ioctl_desc *ioctl = NULL;
|
2005-04-17 06:20:36 +08:00
|
|
|
drm_ioctl_t *func;
|
|
|
|
|
unsigned int nr = DRM_IOCTL_NR(cmd);
|
|
|
|
|
int retcode = -EINVAL;
|
2009-03-20 09:56:14 +08:00
|
|
|
char stack_kdata[128];
|
2007-09-03 10:06:45 +08:00
|
|
|
char *kdata = NULL;
|
2010-08-14 18:20:34 +08:00
|
|
|
unsigned int usize, asize;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-12-17 06:17:09 +08:00
|
|
|
dev = file_priv->minor->dev;
|
2012-02-20 22:18:07 +08:00
|
|
|
|
|
|
|
|
if (drm_device_is_unplugged(dev))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
2007-05-08 13:28:15 +08:00
|
|
|
if ((nr >= DRM_CORE_IOCTL_COUNT) &&
|
2007-03-19 05:52:17 +08:00
|
|
|
((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
|
|
|
|
|
goto err_i1;
|
2007-05-08 13:28:15 +08:00
|
|
|
if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
|
2010-08-14 18:20:34 +08:00
|
|
|
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
|
|
|
|
|
u32 drv_size;
|
2005-04-17 06:20:36 +08:00
|
|
|
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
2010-08-14 18:20:34 +08:00
|
|
|
drv_size = _IOC_SIZE(ioctl->cmd_drv);
|
|
|
|
|
usize = asize = _IOC_SIZE(cmd);
|
|
|
|
|
if (drv_size > asize)
|
|
|
|
|
asize = drv_size;
|
2013-04-12 17:39:59 +08:00
|
|
|
cmd = ioctl->cmd_drv;
|
2010-08-14 18:20:34 +08:00
|
|
|
}
|
2008-06-20 13:42:38 +08:00
|
|
|
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
|
2013-10-16 18:22:44 +08:00
|
|
|
u32 drv_size;
|
|
|
|
|
|
2007-03-19 05:52:17 +08:00
|
|
|
ioctl = &drm_ioctls[nr];
|
2013-10-16 18:22:44 +08:00
|
|
|
|
|
|
|
|
drv_size = _IOC_SIZE(ioctl->cmd);
|
2010-08-14 18:20:34 +08:00
|
|
|
usize = asize = _IOC_SIZE(cmd);
|
2013-10-16 18:22:44 +08:00
|
|
|
if (drv_size > asize)
|
|
|
|
|
asize = drv_size;
|
|
|
|
|
|
|
|
|
|
cmd = ioctl->cmd;
|
2008-06-20 13:42:38 +08:00
|
|
|
} else
|
2005-04-17 06:20:36 +08:00
|
|
|
goto err_i1;
|
2005-09-25 12:28:13 +08:00
|
|
|
|
drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
|
|
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
|
|
|
|
|
task_pid_nr(current),
|
2014-01-29 20:12:31 +08:00
|
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
|
|
file_priv->authenticated, ioctl->name);
|
|
|
|
|
|
2008-06-13 13:04:40 +08:00
|
|
|
/* Do not trust userspace, use our own definition */
|
2005-04-17 06:20:36 +08:00
|
|
|
func = ioctl->func;
|
2005-09-25 12:28:13 +08:00
|
|
|
|
2014-03-13 17:30:25 +08:00
|
|
|
if (unlikely(!func)) {
|
2005-09-25 12:28:13 +08:00
|
|
|
DRM_DEBUG("no function\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
retcode = -EINVAL;
|
2014-03-13 17:30:25 +08:00
|
|
|
goto err_i1;
|
|
|
|
|
}
|
2007-09-03 10:06:45 +08:00
|
|
|
|
2014-03-13 17:30:25 +08:00
|
|
|
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
|
|
|
|
|
if (unlikely(retcode))
|
|
|
|
|
goto err_i1;
|
|
|
|
|
|
|
|
|
|
if (cmd & (IOC_IN | IOC_OUT)) {
|
|
|
|
|
if (asize <= sizeof(stack_kdata)) {
|
|
|
|
|
kdata = stack_kdata;
|
|
|
|
|
} else {
|
|
|
|
|
kdata = kmalloc(asize, GFP_KERNEL);
|
|
|
|
|
if (!kdata) {
|
|
|
|
|
retcode = -ENOMEM;
|
2007-09-03 10:06:45 +08:00
|
|
|
goto err_i1;
|
|
|
|
|
}
|
2009-12-17 06:17:09 +08:00
|
|
|
}
|
2014-03-13 17:30:25 +08:00
|
|
|
if (asize > usize)
|
|
|
|
|
memset(kdata + usize, 0, asize - usize);
|
|
|
|
|
}
|
2007-09-03 10:06:45 +08:00
|
|
|
|
2014-03-13 17:30:25 +08:00
|
|
|
if (cmd & IOC_IN) {
|
|
|
|
|
if (copy_from_user(kdata, (void __user *)arg,
|
|
|
|
|
usize) != 0) {
|
|
|
|
|
retcode = -EFAULT;
|
|
|
|
|
goto err_i1;
|
2007-09-03 10:06:45 +08:00
|
|
|
}
|
2014-06-18 14:33:59 +08:00
|
|
|
} else if (cmd & IOC_OUT) {
|
2014-03-13 17:30:25 +08:00
|
|
|
memset(kdata, 0, usize);
|
2014-06-18 14:33:59 +08:00
|
|
|
}
|
2014-03-13 17:30:25 +08:00
|
|
|
|
|
|
|
|
if (ioctl->flags & DRM_UNLOCKED)
|
|
|
|
|
retcode = func(dev, kdata, file_priv);
|
|
|
|
|
else {
|
|
|
|
|
mutex_lock(&drm_global_mutex);
|
|
|
|
|
retcode = func(dev, kdata, file_priv);
|
|
|
|
|
mutex_unlock(&drm_global_mutex);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (cmd & IOC_OUT) {
|
|
|
|
|
if (copy_to_user((void __user *)arg, kdata,
|
|
|
|
|
usize) != 0)
|
|
|
|
|
retcode = -EFAULT;
|
2005-04-17 06:20:36 +08:00
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|
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}
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2005-09-25 12:28:13 +08:00
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err_i1:
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drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
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if (!ioctl)
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2013-10-09 19:33:43 +08:00
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DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
|
drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
|
|
task_pid_nr(current),
|
2014-01-29 20:12:31 +08:00
|
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
drm: Use names of ioctls in debug traces
The intention here is to make the output of dmesg with full verbosity a
bit easier for a human to parse. This commit transforms:
[drm:drm_ioctl], pid=699, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc010645b, nr=0x5b, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc0106461, nr=0x61, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc01c64ae, nr=0xae, dev 0xe200, auth=1
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, cmd=0xc0106464, nr=0x64, dev 0xe200, auth=1
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
[drm:drm_ioctl], pid=699, cmd=0xc00464af, nr=0xaf, dev 0xe200, auth=1
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
into:
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_THROTTLE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_CREATE
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_TILING
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, IOCTL_MODE_ADDFB
[drm:drm_mode_addfb], [FB:32]
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_MMAP_GTT
[drm:drm_vm_open_locked], 0x7fd9302fe000,0x00a00000
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, I915_GEM_SET_DOMAIN
[drm:drm_ioctl], pid=699, dev=0xe200, auth=1, DRM_IOCTL_MODE_RMFB
[drm:intel_crtc_set_config], [CRTC:3] [NOFB]
v2: drm_ioctls is now a constant (Ville Syrjälä)
Signed-off-by: Chris Cummins <christopher.e.cummins@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-05-09 21:20:40 +08:00
|
|
|
file_priv->authenticated, cmd, nr);
|
|
|
|
|
|
2009-03-20 09:56:14 +08:00
|
|
|
if (kdata != stack_kdata)
|
2007-09-03 10:06:45 +08:00
|
|
|
kfree(kdata);
|
2005-09-25 12:28:13 +08:00
|
|
|
if (retcode)
|
2012-06-16 22:25:24 +08:00
|
|
|
DRM_DEBUG("ret = %d\n", retcode);
|
2005-04-17 06:20:36 +08:00
|
|
|
return retcode;
|
|
|
|
|
}
|
2005-09-25 12:28:13 +08:00
|
|
|
EXPORT_SYMBOL(drm_ioctl);
|
2014-02-26 22:51:57 +08:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
|
|
|
|
|
*
|
|
|
|
|
* @nr: Ioctl number.
|
|
|
|
|
* @flags: Where to return the ioctl permission flags
|
|
|
|
|
*/
|
|
|
|
|
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
|
|
|
|
|
{
|
|
|
|
|
if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
|
|
|
|
|
(nr < DRM_COMMAND_BASE)) {
|
|
|
|
|
*flags = drm_ioctls[nr].flags;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_ioctl_flags);
|