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d22632c83b
For some specialised objects we might need something larger than the
regions min_page_size due to some hw restriction, and slightly more
hairy is needing something smaller with the guarantee that such objects
will never be inserted into any GTT, which is the case for the paging
structures.
This also fixes how we setup the BO page_alignment, if we later migrate
the object somewhere else. For example if the placements are {SMEM,
LMEM}, then we might get this wrong. Pushing the min_page_size behaviour
into the manager should fix this.
v2(Thomas): push the default page size behaviour into buddy_man, and let
the user override it with the page-alignment, which looks cleaner
v3: rebase on ttm sys changes
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625103824.558481-1-matthew.auld@intel.com
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2021 Intel Corporation
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*/
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#ifndef _I915_GEM_TTM_H_
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#define _I915_GEM_TTM_H_
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#include "gem/i915_gem_object_types.h"
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/**
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* i915_gem_to_ttm - Convert a struct drm_i915_gem_object to a
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* struct ttm_buffer_object.
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* @obj: Pointer to the gem object.
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*
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* Return: Pointer to the embedded struct ttm_buffer_object.
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*/
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static inline struct ttm_buffer_object *
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i915_gem_to_ttm(struct drm_i915_gem_object *obj)
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{
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return &obj->__do_not_access;
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}
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/*
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* i915 ttm gem object destructor. Internal use only.
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*/
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void i915_ttm_bo_destroy(struct ttm_buffer_object *bo);
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/**
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* i915_ttm_to_gem - Convert a struct ttm_buffer_object to an embedding
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* struct drm_i915_gem_object.
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*
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* Return: Pointer to the embedding struct ttm_buffer_object, or NULL
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* if the object was not an i915 ttm object.
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*/
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static inline struct drm_i915_gem_object *
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i915_ttm_to_gem(struct ttm_buffer_object *bo)
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{
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if (GEM_WARN_ON(bo->destroy != i915_ttm_bo_destroy))
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return NULL;
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return container_of(bo, struct drm_i915_gem_object, __do_not_access);
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}
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int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
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struct drm_i915_gem_object *obj,
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resource_size_t size,
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resource_size_t page_size,
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unsigned int flags);
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#endif
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