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authorDave Airlie <airlied@redhat.com>2017-04-04 06:26:24 +0300
committerDave Airlie <airlied@redhat.com>2017-06-14 05:10:22 +0300
commite9083420bbacce27e43d418064d0d2dfb4b37aaa (patch)
treea539c575bae132fa2cc992ee53da4c04909e7fe1 /Documentation/gpu
parentc9f0726ff360cf75aaafd326e439e9234630aee9 (diff)
downloadlinux-e9083420bbacce27e43d418064d0d2dfb4b37aaa.tar.xz
drm: introduce sync objects (v4)
Sync objects are new toplevel drm object, that contain a pointer to a fence. This fence can be updated via command submission ioctls via drivers. There is also a generic wait obj API modelled on the vulkan wait API (with code modelled on some amdgpu code). These objects can be converted to an opaque fd that can be passes between processes. v2: rename reference/unreference to put/get (Chris) fix leaked reference (David Zhou) drop mutex in favour of cmpxchg (Chris) v3: cleanups from danvet, rebase on drm_fops rename check fd_flags is 0 in ioctls. v4: export find/free, change replace fence to take a syncobj. In order to support lookup first, replace later semantics which seem in the end to be cleaner. Reviewed-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-internals.rst3
-rw-r--r--Documentation/gpu/drm-mm.rst12
2 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst
index f6882ad0b3c3..0d936c67bf7d 100644
--- a/Documentation/gpu/drm-internals.rst
+++ b/Documentation/gpu/drm-internals.rst
@@ -98,6 +98,9 @@ DRIVER_ATOMIC
implement appropriate obj->atomic_get_property() vfuncs for any
modeset objects with driver specific properties.
+DRIVER_SYNCOBJ
+ Driver support drm sync objects.
+
Major, Minor and Patchlevel
~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst
index 96b9c34c21e4..9412798645c1 100644
--- a/Documentation/gpu/drm-mm.rst
+++ b/Documentation/gpu/drm-mm.rst
@@ -484,3 +484,15 @@ DRM Cache Handling
.. kernel-doc:: drivers/gpu/drm/drm_cache.c
:export:
+
+DRM Sync Objects
+===========================
+
+.. kernel-doc:: drivers/gpu/drm/drm_syncobj.c
+ :doc: Overview
+
+.. kernel-doc:: include/drm/drm_syncobj.h
+ :export:
+
+.. kernel-doc:: drivers/gpu/drm/drm_syncobj.c
+ :export: