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 | * @used_visible_size: How much of this resource, if any, uses the CPU visible |
25 | * portion, in pages. |
26 | * @mm: the struct i915_buddy_mm for this resource |
27 | * |
28 | * Extends the struct ttm_resource to manage an address space allocation with |
29 | * one or more struct i915_buddy_block. |
30 | */ |
31 | struct i915_ttm_buddy_resource { |
32 | struct ttm_resource base; |
33 | struct list_head blocks; |
34 | unsigned long flags; |
35 | unsigned long used_visible_size; |
36 | struct drm_buddy *mm; |
37 | }; |
38 | |
39 | /** |
40 | * to_ttm_buddy_resource |
41 | * |
42 | * @res: the resource to upcast |
43 | * |
44 | * Upcast the struct ttm_resource object into a struct i915_ttm_buddy_resource. |
45 | */ |
46 | static inline struct i915_ttm_buddy_resource * |
47 | to_ttm_buddy_resource(struct ttm_resource *res) |
48 | { |
49 | return container_of(res, struct i915_ttm_buddy_resource, base); |
50 | } |
51 | |
52 | int i915_ttm_buddy_man_init(struct ttm_device *bdev, |
53 | unsigned type, bool use_tt, |
54 | u64 size, u64 visible_size, |
55 | u64 default_page_size, u64 chunk_size); |
56 | int i915_ttm_buddy_man_fini(struct ttm_device *bdev, |
57 | unsigned int type); |
58 | |
59 | int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, |
60 | u64 start, u64 size); |
61 | |
62 | u64 i915_ttm_buddy_man_visible_size(struct ttm_resource_manager *man); |
63 | |
64 | void i915_ttm_buddy_man_avail(struct ttm_resource_manager *man, |
65 | u64 *avail, u64 *avail_visible); |
66 | |
67 | #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |
68 | void i915_ttm_buddy_man_force_visible_size(struct ttm_resource_manager *man, |
69 | u64 size); |
70 | #endif |
71 | |
72 | #endif |
73 | |