57822dc6b9
Flushing the cachelines for an object is slow, can be as much as 100ms for a large framebuffer. We currently do this under the struct_mutex BKL on execution or on pageflip. But now with the ability to add fences to obj->resv for both flips and execbuf (and we naturally wait on the fence before CPU access), we can move the clflush operation to a workqueue and signal a fence for completion, thereby doing the work asynchronously and not blocking the driver or its clients. v2: Introduce i915_gem_clflush.h and use a new name, split out some extras into separate patches. Suggested-by: Akash Goel <akash.goel@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170222114049.28456-5-chris@chris-wilson.co.uk
38 lines
1.5 KiB
C
38 lines
1.5 KiB
C
/*
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* Copyright © 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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*/
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#ifndef __I915_GEM_CLFLUSH_H__
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#define __I915_GEM_CLFLUSH_H__
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struct drm_i915_private;
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struct drm_i915_gem_object;
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void i915_gem_clflush_init(struct drm_i915_private *i915);
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void i915_gem_clflush_object(struct drm_i915_gem_object *obj,
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unsigned int flags);
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#define I915_CLFLUSH_FORCE BIT(0)
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#define I915_CLFLUSH_SYNC BIT(1)
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#endif /* __I915_GEM_CLFLUSH_H__ */
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