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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-04-04 11:52:57 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-04-04 20:47:54 +0200
commit2640981f36004085eeff65849410121809fcf560 (patch)
treea5fca76487eb67cbb00b277bfe07ec165b64156f /Documentation/gpu
parente22717046a7da3cd0c0b0eec323e1dc38c777a42 (diff)
downloadlinux-2640981f36004085eeff65849410121809fcf560.tar.bz2
drm: document drm_ioctl.[hc]
Also unify/merge with the existing stuff. I was a bit torn where to put this, but in the end I decided to put all the ioctl/sysfs/debugfs stuff into drm-uapi.rst. That means we have a bit a split with the other uapi related stuff used internally, like drm_file.[hc], but I think overall this makes more sense. If it's too confusing we can always add more cross-links to make it more discoverable. But the auto-sprinkling of links kernel-doc already does seems sufficient. Also for prettier docs and more cross-links, switch the internal defines over to an enum, as usual. v2: Update kerneldoc fro drm_compat_ioctl too (caught by 0day), plus a bit more drive-by polish. v3: Fix typo, spotted by xerpi on irc (Sergi). v4: Add missing space in comment (Neil). Cc: Sergi Granell <xerpi.g.12@gmail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170404095304.17599-4-daniel.vetter@ffwll.ch
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-internals.rst50
-rw-r--r--Documentation/gpu/drm-uapi.rst14
2 files changed, 14 insertions, 50 deletions
diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index a09c721f9e89..babfb6143bd9 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -255,56 +255,6 @@ File Operations
.. kernel-doc:: drivers/gpu/drm/drm_file.c
:export:
-IOCTLs
-------
-
-struct drm_ioctl_desc \*ioctls; int num_ioctls;
- Driver-specific ioctls descriptors table.
-
-Driver-specific ioctls numbers start at DRM_COMMAND_BASE. The ioctls
-descriptors table is indexed by the ioctl number offset from the base
-value. Drivers can use the DRM_IOCTL_DEF_DRV() macro to initialize
-the table entries.
-
-::
-
- DRM_IOCTL_DEF_DRV(ioctl, func, flags)
-
-``ioctl`` is the ioctl name. Drivers must define the DRM_##ioctl and
-DRM_IOCTL_##ioctl macros to the ioctl number offset from
-DRM_COMMAND_BASE and the ioctl number respectively. The first macro is
-private to the device while the second must be exposed to userspace in a
-public header.
-
-``func`` is a pointer to the ioctl handler function compatible with the
-``drm_ioctl_t`` type.
-
-::
-
- typedef int drm_ioctl_t(struct drm_device *dev, void *data,
- struct drm_file *file_priv);
-
-``flags`` is a bitmask combination of the following values. It restricts
-how the ioctl is allowed to be called.
-
-- DRM_AUTH - Only authenticated callers allowed
-
-- DRM_MASTER - The ioctl can only be called on the master file handle
-
-- DRM_ROOT_ONLY - Only callers with the SYSADMIN capability allowed
-
-- DRM_CONTROL_ALLOW - The ioctl can only be called on a control
- device
-
-- DRM_UNLOCKED - The ioctl handler will be called without locking the
- DRM global mutex. This is the enforced default for kms drivers (i.e.
- using the DRIVER_MODESET flag) and hence shouldn't be used any more
- for new drivers.
-
-.. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
- :export:
-
-
Misc Utilities
==============
diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index 8b0f0e403f0c..858457567d3d 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -160,6 +160,20 @@ other hand, a driver requires shared state between clients which is
visible to user-space and accessible beyond open-file boundaries, they
cannot support render nodes.
+IOCTL Support on Device Nodes
+=============================
+
+.. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
+ :doc: driver specific ioctls
+
+.. kernel-doc:: include/drm/drm_ioctl.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
+ :export:
+
+.. kernel-doc:: drivers/gpu/drm/drm_ioc32.c
+ :export:
Testing and validation
======================