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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2021 Intel Corporation
*/
#ifndef __I915_TTM_BUDDY_MANAGER_H__
#define __I915_TTM_BUDDY_MANAGER_H__
#include <linux/list.h>
#include <linux/types.h>
#include <drm/ttm/ttm_resource.h>
struct ttm_device;
struct ttm_resource_manager;
struct drm_buddy;
/**
* struct i915_ttm_buddy_resource
*
* @base: struct ttm_resource base class we extend
* @blocks: the list of struct i915_buddy_block for this resource/allocation
* @flags: DRM_BUDDY_*_ALLOCATION flags
* @used_visible_size: How much of this resource, if any, uses the CPU visible
* portion, in pages.
* @mm: the struct i915_buddy_mm for this resource
*
* Extends the struct ttm_resource to manage an address space allocation with
* one or more struct i915_buddy_block.
*/
struct i915_ttm_buddy_resource {
struct ttm_resource base;
struct list_head blocks;
unsigned long flags;
unsigned long used_visible_size;
struct drm_buddy *mm;
};
/**
* to_ttm_buddy_resource
*
* @res: the resource to upcast
*
* Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource.
*/
static inline struct i915_ttm_buddy_resource *
to_ttm_buddy_resource(struct ttm_resource *res)
{
return container_of(res, struct i915_ttm_buddy_resource, base);
}
int i915_ttm_buddy_man_init(struct ttm_device *bdev,
unsigned type, bool use_tt,
u64 size, u64 visible_size,
u64 default_page_size, u64 chunk_size);
int i915_ttm_buddy_man_fini(struct ttm_device *bdev,
unsigned int type);
int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man,
u64 start, u64 size);
u64 i915_ttm_buddy_man_visible_size(struct ttm_resource_manager *man);
void i915_ttm_buddy_man_avail(struct ttm_resource_manager *man,
u64 *avail, u64 *avail_visible);
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
void i915_ttm_buddy_man_force_visible_size(struct ttm_resource_manager *man,
u64 size);
#endif
#endif
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