1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2021 Intel Corporation
4  */
5 
6 #ifndef __I915_TTM_BUDDY_MANAGER_H__
7 #define __I915_TTM_BUDDY_MANAGER_H__
8 
9 #include <linux/list.h>
10 #include <linux/types.h>
11 
12 #include <drm/ttm/ttm_resource.h>
13 
14 struct ttm_device;
15 struct ttm_resource_manager;
16 struct drm_buddy;
17 
18 /**
19  * struct i915_ttm_buddy_resource
20  *
21  * @base: struct ttm_resource base class we extend
22  * @blocks: the list of struct i915_buddy_block for this resource/allocation
23  * @flags: DRM_BUDDY_*_ALLOCATION flags
24  * @mm: the struct i915_buddy_mm for this resource
25  *
26  * Extends the struct ttm_resource to manage an address space allocation with
27  * one or more struct i915_buddy_block.
28  */
29 struct i915_ttm_buddy_resource {
30 	struct ttm_resource base;
31 	struct list_head blocks;
32 	unsigned long flags;
33 	struct drm_buddy *mm;
34 };
35 
36 /**
37  * to_ttm_buddy_resource
38  *
39  * @res: the resource to upcast
40  *
41  * Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource.
42  */
43 static inline struct i915_ttm_buddy_resource *
44 to_ttm_buddy_resource(struct ttm_resource *res)
45 {
46 	return container_of(res, struct i915_ttm_buddy_resource, base);
47 }
48 
49 int i915_ttm_buddy_man_init(struct ttm_device *bdev,
50 			    unsigned type, bool use_tt,
51 			    u64 size, u64 default_page_size, u64 chunk_size);
52 int i915_ttm_buddy_man_fini(struct ttm_device *bdev,
53 			    unsigned int type);
54 
55 int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man,
56 			       u64 start, u64 size);
57 
58 #endif
59