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 *
to_ttm_buddy_resource(struct ttm_resource * res)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