drm/i915: Move frontbuffer CS write tracking from ggtt vma to object
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 16 Nov 2016 19:07:04 +0000 (19:07 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Fri, 18 Nov 2016 11:15:59 +0000 (11:15 +0000)
commit5b8c8aec8e8ef999c8b3eaa699e46ef25550d118
treedce0a2b7b18b8c59bb9c59651d7b0adbc1ee32f2
parentd806e6828be36ce21173340ba3d0078345bd12bc
drm/i915: Move frontbuffer CS write tracking from ggtt vma to object

I tried to avoid having to track the write for every VMA by only
tracking writes to the ggtt. However, for the purposes of frontbuffer
tracking this is insufficient as we need to invalidate around writes not
just to the the ggtt but all aliased ppgtt views of the framebuffer. By
moving the critical section to the object and only doing so for
framebuffer writes we can reduce the tracking even further by only
watching framebuffers and not vma.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161116190704.5293-1-chris@chris-wilson.co.uk
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
drivers/gpu/drm/i915/i915_gem.c
drivers/gpu/drm/i915/i915_gem_execbuffer.c
drivers/gpu/drm/i915/i915_gem_object.h
drivers/gpu/drm/i915/i915_gpu_error.c
drivers/gpu/drm/i915/i915_vma.c
drivers/gpu/drm/i915/i915_vma.h
drivers/gpu/drm/i915/intel_frontbuffer.h