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We would like to be able to exercise huge allocations even on memory constrained devices. To do this we create an object that allocates only a few pages and remaps them across its whole range - each page is reused multiple times. We can therefore pretend we are rendering into a much larger object. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-9-chris@chris-wilson.co.uk
45 lines
1.6 KiB
C
45 lines
1.6 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 __HUGE_GEM_OBJECT_H
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#define __HUGE_GEM_OBJECT_H
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struct drm_i915_gem_object *
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huge_gem_object(struct drm_i915_private *i915,
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phys_addr_t phys_size,
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dma_addr_t dma_size);
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static inline phys_addr_t
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huge_gem_object_phys_size(struct drm_i915_gem_object *obj)
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{
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return obj->scratch;
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}
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static inline dma_addr_t
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huge_gem_object_dma_size(struct drm_i915_gem_object *obj)
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{
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return obj->base.size;
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}
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#endif /* !__HUGE_GEM_OBJECT_H */
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