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| 2 | |
| 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 | |
| 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 | |
| 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 *drm_suballoc_alloc(gfp_t gfp);
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| 57 |
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| 58 | int drm_suballoc_insert(struct drm_suballoc_manager *sa_manager,
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| 59 | struct drm_suballoc *sa, size_t size, bool intr,
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| 60 | size_t align);
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| 61 |
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| 62 | struct drm_suballoc *
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| 63 | drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size,
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| 64 | gfp_t gfp, bool intr, size_t align);
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| 65 |
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| 66 | void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence);
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| 67 |
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| 68 | |
| 69 | * drm_suballoc_soffset - Range start.
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| 70 | * @sa: The struct drm_suballoc.
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| 71 | *
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| 72 | * Return: The start of the allocated range.
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| 73 |
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| 74 | static inline size_t drm_suballoc_soffset(struct drm_suballoc *sa)
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| 75 | {
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| 76 | return sa->soffset;
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| 77 | }
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| 78 |
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| 79 | |
| 80 | * drm_suballoc_eoffset - Range end.
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| 81 | * @sa: The struct drm_suballoc.
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| 82 | *
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| 83 | * Return: The end of the allocated range + 1.
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| 84 |
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| 85 | static inline size_t drm_suballoc_eoffset(struct drm_suballoc *sa)
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| 86 | {
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| 87 | return sa->eoffset;
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| 88 | }
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| 89 |
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| 90 | |
| 91 | * drm_suballoc_size - Range size.
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| 92 | * @sa: The struct drm_suballoc.
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| 93 | *
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| 94 | * Return: The size of the allocated range.
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| 95 |
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| 96 | static inline size_t drm_suballoc_size(struct drm_suballoc *sa)
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| 97 | {
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| 98 | return sa->eoffset - sa->soffset;
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| 99 | }
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| 100 |
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| 101 | #ifdef CONFIG_DEBUG_FS
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| 102 | void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
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| 103 | struct drm_printer *p,
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| 104 | unsigned long long suballoc_base);
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| 105 | #else
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| 106 | static inline void
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| 107 | drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
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| 108 | struct drm_printer *p,
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| 109 | unsigned long long suballoc_base)
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| 110 | { }
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| 111 |
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| 112 | #endif
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| 113 |
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| 114 | #endif
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