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1/* SPDX-License-Identifier: GPL-2.0 OR MIT */2/*3 * Copyright 2011 Red Hat Inc.4 * Copyright © 2022 Intel Corporation5 */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 3215/**16 * struct drm_suballoc_manager - fenced range allocations17 * @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 range35 * @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 *57drm_suballoc_new(struct drm_suballoc_manager *sa_manager, size_t size,58 gfp_t gfp, bool intr, size_t align);59 60void 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 */68static 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 */79static 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 */90static inline size_t drm_suballoc_size(struct drm_suballoc *sa)91{92 return sa->eoffset - sa->soffset;93}94 95#ifdef CONFIG_DEBUG_FS96void drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,97 struct drm_printer *p,98 unsigned long long suballoc_base);99#else100static inline void101drm_suballoc_dump_debug_info(struct drm_suballoc_manager *sa_manager,102 struct drm_printer *p,103 unsigned long long suballoc_base)104{ }105 106#endif107 108#endif /* _DRM_SUBALLOC_H_ */109