| 1 | /* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
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| 2 | /* |
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| 3 | * Copyright 2011 Red Hat Inc. |
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| 4 | * Copyright © 2022 Intel Corporation |
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| 5 | */ |
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| 6 | #ifndef _DRM_SUBALLOC_H_ |
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| 7 | #define _DRM_SUBALLOC_H_ |
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| 8 | |
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| 9 | #include <drm/drm_mm.h> |
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| 10 | |
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| 11 | #include <linux/dma-fence.h> |
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| 12 | #include <linux/types.h> |
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| 13 | |
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| 14 | #define DRM_SUBALLOC_MAX_QUEUES 32 |
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| 15 | /** |
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| 16 | * struct drm_suballoc_manager - fenced range allocations |
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| 17 | * @wq: Wait queue for sleeping allocations on contention. |
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| 18 | * @hole: Pointer to first hole node. |
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| 19 | * @olist: List of allocated ranges. |
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| 20 | * @flist: Array[fence context hash] of queues of fenced allocated ranges. |
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| 21 | * @size: Size of the managed range. |
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| 22 | * @align: Default alignment for the managed range. |
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| 23 | */ |
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| 24 | struct drm_suballoc_manager { |
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| 25 | wait_queue_head_t wq; |
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| 26 | struct list_head *hole; |
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| 27 | struct list_head olist; |
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| 28 | struct list_head flist[DRM_SUBALLOC_MAX_QUEUES]; |
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| 29 | size_t size; |
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| 30 | size_t align; |
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| 31 | }; |
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| 32 | |
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| 33 | /** |
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| 34 | * struct drm_suballoc - Sub-allocated range |
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| 35 | * @olist: List link for list of allocated ranges. |
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| 36 | * @flist: List linkk for the manager fenced allocated ranges queues. |
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| 37 | * @manager: The drm_suballoc_manager. |
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| 38 | * @soffset: Start offset. |
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| 39 | * @eoffset: End offset + 1 so that @eoffset - @soffset = size. |
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| 40 | * @fence: The fence protecting the allocation. |
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| 41 | */ |
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| 42 | struct drm_suballoc { |
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| 43 | struct list_head olist; |
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| 44 | struct list_head flist; |
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| 45 | struct drm_suballoc_manager *manager; |
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| 46 | size_t soffset; |
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| 47 | size_t eoffset; |
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| 48 | struct dma_fence *fence; |
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| 49 | }; |
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| 50 | |
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| 51 | void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager, |
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| 52 | size_t size, size_t align); |
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| 53 | |
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| 54 | void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager); |
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| 55 | |
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| 56 | struct drm_suballoc * |
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| 57 | drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size, |
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| 58 | gfp_t gfp, bool intr, size_t align); |
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| 59 | |
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| 60 | void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence); |
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| 61 | |
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| 62 | /** |
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| 63 | * drm_suballoc_soffset - Range start. |
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| 64 | * @sa: The struct drm_suballoc. |
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| 65 | * |
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| 66 | * Return: The start of the allocated range. |
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| 67 | */ |
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| 68 | static inline size_t drm_suballoc_soffset(struct drm_suballoc *sa) |
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| 69 | { |
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| 70 | return sa->soffset; |
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| 71 | } |
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| 72 | |
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| 73 | /** |
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| 74 | * drm_suballoc_eoffset - Range end. |
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| 75 | * @sa: The struct drm_suballoc. |
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| 76 | * |
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| 77 | * Return: The end of the allocated range + 1. |
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| 78 | */ |
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| 79 | static inline size_t drm_suballoc_eoffset(struct drm_suballoc *sa) |
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| 80 | { |
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| 81 | return sa->eoffset; |
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| 82 | } |
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| 83 | |
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| 84 | /** |
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| 85 | * drm_suballoc_size - Range size. |
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| 86 | * @sa: The struct drm_suballoc. |
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| 87 | * |
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| 88 | * Return: The size of the allocated range. |
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| 89 | */ |
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| 90 | static inline size_t drm_suballoc_size(struct drm_suballoc *sa) |
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| 91 | { |
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| 92 | return sa->eoffset - sa->soffset; |
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| 93 | } |
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| 94 | |
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| 95 | #ifdef CONFIG_DEBUG_FS |
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| 96 | void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, |
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| 97 | struct drm_printer *p, |
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| 98 | unsigned long long suballoc_base); |
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| 99 | #else |
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| 100 | static inline void |
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| 101 | drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager, |
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| 102 | struct drm_printer *p, |
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| 103 | unsigned long long suballoc_base) |
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| 104 | { } |
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| 105 | |
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| 106 | #endif |
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| 107 | |
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| 108 | #endif /* _DRM_SUBALLOC_H_ */ |
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| 109 | |
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