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849ee8a2 ML |
1 | /* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
2 | /* | |
3 | * Copyright 2011 Red Hat Inc. | |
4 | * Copyright © 2022 Intel Corporation | |
5 | */ | |
6 | #ifndef _DRM_SUBALLOC_H_ | |
7 | #define _DRM_SUBALLOC_H_ | |
8 | ||
9 | #include <drm/drm_mm.h> | |
10 | ||
11 | #include <linux/dma-fence.h> | |
12 | #include <linux/types.h> | |
13 | ||
14 | #define DRM_SUBALLOC_MAX_QUEUES 32 | |
15 | /** | |
16 | * struct drm_suballoc_manager - fenced range allocations | |
17 | * @wq: Wait queue for sleeping allocations on contention. | |
18 | * @hole: Pointer to first hole node. | |
19 | * @olist: List of allocated ranges. | |
20 | * @flist: Array[fence context hash] of queues of fenced allocated ranges. | |
21 | * @size: Size of the managed range. | |
22 | * @align: Default alignment for the managed range. | |
23 | */ | |
24 | struct drm_suballoc_manager { | |
25 | wait_queue_head_t wq; | |
26 | struct list_head *hole; | |
27 | struct list_head olist; | |
28 | struct list_head flist[DRM_SUBALLOC_MAX_QUEUES]; | |
29 | size_t size; | |
30 | size_t align; | |
31 | }; | |
32 | ||
33 | /** | |
34 | * struct drm_suballoc - Sub-allocated range | |
35 | * @olist: List link for list of allocated ranges. | |
36 | * @flist: List linkk for the manager fenced allocated ranges queues. | |
37 | * @manager: The drm_suballoc_manager. | |
38 | * @soffset: Start offset. | |
39 | * @eoffset: End offset + 1 so that @eoffset - @soffset = size. | |
40 | * @dma_fence: The fence protecting the allocation. | |
41 | */ | |
42 | struct drm_suballoc { | |
43 | struct list_head olist; | |
44 | struct list_head flist; | |
45 | struct drm_suballoc_manager *manager; | |
46 | size_t soffset; | |
47 | size_t eoffset; | |
48 | struct dma_fence *fence; | |
49 | }; | |
50 | ||
51 | void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager, | |
52 | size_t size, size_t align); | |
53 | ||
54 | void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager); | |
55 | ||
56 | struct drm_suballoc * | |
57 | drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size, | |
58 | gfp_t gfp, bool intr, size_t align); | |
59 | ||
60 | void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence); | |
61 | ||
62 | /** | |
63 | * drm_suballoc_soffset - Range start. | |
64 | * @sa: The struct drm_suballoc. | |
65 | * | |
66 | * Return: The start of the allocated range. | |
67 | */ | |
68 | static inline size_t drm_suballoc_soffset(struct drm_suballoc *sa) | |
69 | { | |
70 | return sa->soffset; | |
71 | } | |
72 | ||
73 | /** | |
74 | * drm_suballoc_eoffset - Range end. | |
75 | * @sa: The struct drm_suballoc. | |
76 | * | |
77 | * Return: The end of the allocated range + 1. | |
78 | */ | |
79 | static inline size_t drm_suballoc_eoffset(struct drm_suballoc *sa) | |
80 | { | |
81 | return sa->eoffset; | |
82 | } | |
83 | ||
84 | /** | |
85 | * drm_suballoc_size - Range size. | |
86 | * @sa: The struct drm_suballoc. | |
87 | * | |
88 | * Return: The size of the allocated range. | |
89 | */ | |
90 | static inline size_t drm_suballoc_size(struct drm_suballoc *sa) | |
91 | { | |
92 | return sa->eoffset - sa->soffset; | |
93 | } | |
94 | ||
95 | #ifdef CONFIG_DEBUG_FS | |
96 | void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, | |
97 | struct drm_printer *p, | |
98 | unsigned long long suballoc_base); | |
99 | #else | |
100 | static inline void | |
101 | drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, | |
102 | struct drm_printer *p, | |
103 | unsigned long long suballoc_base) | |
104 | { } | |
105 | ||
106 | #endif | |
107 | ||
108 | #endif /* _DRM_SUBALLOC_H_ */ |