drm/i915: Mark up clflushes as belonging to an unordered timeline
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 3 May 2017 09:39:18 +0000 (10:39 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Wed, 3 May 2017 10:08:45 +0000 (11:08 +0100)
commit9431282832e145237196a19f2464531eb9790240
tree10107dd3f2a1632da22818a32c5a5d3a1ecdeeca
parent6b07b6d2bd66a70dae0f9e63b88c11da2108cf06
drm/i915: Mark up clflushes as belonging to an unordered timeline

2 clflushes on two different objects are not ordered, and so do not
belong to the same timeline (context). Either we use a unique context
for each, or we reserve a special global context to mean unordered.
Ideally, we would reserve 0 to mean unordered (DMA_FENCE_NO_CONTEXT) to
have the same semantics everywhere.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170503093924.5320-1-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/i915_gem.c
drivers/gpu/drm/i915/i915_gem_clflush.c
drivers/gpu/drm/i915/i915_gem_clflush.h