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 i915_buddy_mm;
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  * @mm: the struct i915_buddy_mm for this resource
24  *
25  * Extends the struct ttm_resource to manage an address space allocation with
26  * one or more struct i915_buddy_block.
27  */
28 struct i915_ttm_buddy_resource {
29 	struct ttm_resource base;
30 	struct list_head blocks;
31 	struct i915_buddy_mm *mm;
32 };
33 
34 /**
35  * to_ttm_buddy_resource
36  *
37  * @res: the resource to upcast
38  *
39  * Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource.
40  */
41 static inline struct i915_ttm_buddy_resource *
42 to_ttm_buddy_resource(struct ttm_resource *res)
43 {
44 	return container_of(res, struct i915_ttm_buddy_resource, base);
45 }
46 
47 int i915_ttm_buddy_man_init(struct ttm_device *bdev,
48 			    unsigned type, bool use_tt,
49 			    u64 size, u64 default_page_size, u64 chunk_size);
50 int i915_ttm_buddy_man_fini(struct ttm_device *bdev,
51 			    unsigned int type);
52 
53 int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man,
54 			       u64 start, u64 size);
55 
56 #endif
57