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5b8c8aec8e
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>
92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/*
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* Copyright (c) 2014-2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef __INTEL_FRONTBUFFER_H__
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#define __INTEL_FRONTBUFFER_H__
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struct drm_i915_private;
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struct drm_i915_gem_object;
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void intel_frontbuffer_flip_prepare(struct drm_i915_private *dev_priv,
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unsigned frontbuffer_bits);
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void intel_frontbuffer_flip_complete(struct drm_i915_private *dev_priv,
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unsigned frontbuffer_bits);
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void intel_frontbuffer_flip(struct drm_i915_private *dev_priv,
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unsigned frontbuffer_bits);
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void __intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin,
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unsigned int frontbuffer_bits);
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void __intel_fb_obj_flush(struct drm_i915_gem_object *obj,
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bool retire,
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enum fb_op_origin origin,
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unsigned int frontbuffer_bits);
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/**
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* intel_fb_obj_invalidate - invalidate frontbuffer object
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* @obj: GEM object to invalidate
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* @origin: which operation caused the invalidation
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*
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* This function gets called every time rendering on the given object starts and
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* frontbuffer caching (fbc, low refresh rate for DRRS, panel self refresh) must
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* be invalidated. For ORIGIN_CS any subsequent invalidation will be delayed
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* until the rendering completes or a flip on this frontbuffer plane is
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* scheduled.
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*/
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static inline bool intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin)
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{
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unsigned int frontbuffer_bits;
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frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
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if (!frontbuffer_bits)
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return false;
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__intel_fb_obj_invalidate(obj, origin, frontbuffer_bits);
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return true;
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}
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/**
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* intel_fb_obj_flush - flush frontbuffer object
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* @obj: GEM object to flush
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* @retire: set when retiring asynchronous rendering
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* @origin: which operation caused the flush
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*
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* This function gets called every time rendering on the given object has
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* completed and frontbuffer caching can be started again. If @retire is true
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* then any delayed flushes will be unblocked.
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*/
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static inline void intel_fb_obj_flush(struct drm_i915_gem_object *obj,
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bool retire,
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enum fb_op_origin origin)
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{
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unsigned int frontbuffer_bits;
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frontbuffer_bits = atomic_read(&obj->frontbuffer_bits);
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if (!frontbuffer_bits)
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return;
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__intel_fb_obj_flush(obj, retire, origin, frontbuffer_bits);
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}
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#endif /* __INTEL_FRONTBUFFER_H__ */
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