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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
56 lines
1.4 KiB
C
56 lines
1.4 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_TTM_BUDDY_MANAGER_H__
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#define __I915_TTM_BUDDY_MANAGER_H__
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#include <linux/list.h>
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#include <linux/types.h>
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#include <drm/ttm/ttm_resource.h>
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struct ttm_device;
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struct ttm_resource_manager;
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struct i915_buddy_mm;
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/**
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* struct i915_ttm_buddy_resource
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*
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* @base: struct ttm_resource base class we extend
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* @blocks: the list of struct i915_buddy_block for this resource/allocation
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* @mm: the struct i915_buddy_mm for this resource
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*
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* Extends the struct ttm_resource to manage an address space allocation with
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* one or more struct i915_buddy_block.
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*/
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struct i915_ttm_buddy_resource {
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struct ttm_resource base;
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struct list_head blocks;
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struct i915_buddy_mm *mm;
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};
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/**
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* to_ttm_buddy_resource
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*
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* @res: the resource to upcast
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*
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* Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource.
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*/
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static inline struct i915_ttm_buddy_resource *
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to_ttm_buddy_resource(struct ttm_resource *res)
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{
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return container_of(res, struct i915_ttm_buddy_resource, base);
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}
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int i915_ttm_buddy_man_init(struct ttm_device *bdev,
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unsigned type, bool use_tt,
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u64 size, u64 default_page_size, u64 chunk_size);
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int i915_ttm_buddy_man_fini(struct ttm_device *bdev,
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unsigned int type);
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int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man,
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u64 start, u64 size);
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#endif
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