Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
24struct 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 * @fence: The fence protecting the allocation.
41 */
42struct 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
51void drm_suballoc_manager_init(struct drm_suballoc_manager *sa_manager,
52 size_t size, size_t align);
53
54void drm_suballoc_manager_fini(struct drm_suballoc_manager *sa_manager);
55
56struct drm_suballoc *drm_suballoc_alloc(gfp_t gfp);
57
58int drm_suballoc_insert(struct drm_suballoc_manager *sa_manager,
59 struct drm_suballoc *sa, size_t size, bool intr,
60 size_t align);
61
62struct drm_suballoc *
63drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size,
64 gfp_t gfp, bool intr, size_t align);
65
66void drm_suballoc_free(struct drm_suballoc *sa, struct dma_fence *fence);
67
68/**
69 * drm_suballoc_soffset - Range start.
70 * @sa: The struct drm_suballoc.
71 *
72 * Return: The start of the allocated range.
73 */
74static inline size_t drm_suballoc_soffset(struct drm_suballoc *sa)
75{
76 return sa->soffset;
77}
78
79/**
80 * drm_suballoc_eoffset - Range end.
81 * @sa: The struct drm_suballoc.
82 *
83 * Return: The end of the allocated range + 1.
84 */
85static inline size_t drm_suballoc_eoffset(struct drm_suballoc *sa)
86{
87 return sa->eoffset;
88}
89
90/**
91 * drm_suballoc_size - Range size.
92 * @sa: The struct drm_suballoc.
93 *
94 * Return: The size of the allocated range.
95 */
96static inline size_t drm_suballoc_size(struct drm_suballoc *sa)
97{
98 return sa->eoffset - sa->soffset;
99}
100
101#ifdef CONFIG_DEBUG_FS
102void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
103 struct drm_printer *p,
104 unsigned long long suballoc_base);
105#else
106static inline void
107drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,
108 struct drm_printer *p,
109 unsigned long long suballoc_base)
110{ }
111
112#endif
113
114#endif /* _DRM_SUBALLOC_H_ */