drm: introduce sync objects (v4)
authorDave Airlie <airlied@redhat.com>
Tue, 4 Apr 2017 03:26:24 +0000 (13:26 +1000)
committerDave Airlie <airlied@redhat.com>
Wed, 14 Jun 2017 02:10:22 +0000 (12:10 +1000)
commite9083420bbacce27e43d418064d0d2dfb4b37aaa
treea539c575bae132fa2cc992ee53da4c04909e7fe1
parentc9f0726ff360cf75aaafd326e439e9234630aee9
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>
Documentation/gpu/drm-internals.rst
Documentation/gpu/drm-mm.rst
drivers/gpu/drm/Makefile
drivers/gpu/drm/drm_file.c
drivers/gpu/drm/drm_internal.h
drivers/gpu/drm/drm_ioctl.c
drivers/gpu/drm/drm_syncobj.c [new file with mode: 0644]
include/drm/drm_drv.h
include/drm/drm_file.h
include/drm/drm_syncobj.h [new file with mode: 0644]
include/uapi/drm/drm.h