162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
262306a36Sopenharmony_ci/*
362306a36Sopenharmony_ci * drivers/hyperhold/hp_space.h
462306a36Sopenharmony_ci *
562306a36Sopenharmony_ci * Copyright (c) 2020-2022 Huawei Technologies Co., Ltd.
662306a36Sopenharmony_ci */
762306a36Sopenharmony_ci
862306a36Sopenharmony_ci#ifndef _HP_SPACE_H_
962306a36Sopenharmony_ci#define _HP_SPACE_H_
1062306a36Sopenharmony_ci
1162306a36Sopenharmony_ci#include <linux/kernel.h>
1262306a36Sopenharmony_ci
1362306a36Sopenharmony_cistruct hp_space {
1462306a36Sopenharmony_ci	u32 ext_size;
1562306a36Sopenharmony_ci	u32 nr_ext;
1662306a36Sopenharmony_ci	unsigned long *bitmap;
1762306a36Sopenharmony_ci	atomic_t last_alloc_bit;
1862306a36Sopenharmony_ci	atomic_t nr_alloced;
1962306a36Sopenharmony_ci	wait_queue_head_t empty_wq;
2062306a36Sopenharmony_ci};
2162306a36Sopenharmony_ci
2262306a36Sopenharmony_civoid deinit_space(struct hp_space *spc);
2362306a36Sopenharmony_cibool init_space(struct hp_space *spc, u64 dev_size, u32 ext_size);
2462306a36Sopenharmony_ciint alloc_eid(struct hp_space *spc);
2562306a36Sopenharmony_civoid free_eid(struct hp_space *spc, u32 eid);
2662306a36Sopenharmony_ci
2762306a36Sopenharmony_cibool wait_for_space_empty(struct hp_space *spc, bool force);
2862306a36Sopenharmony_ci
2962306a36Sopenharmony_ciu64 space_memory(void);
3062306a36Sopenharmony_ci#endif
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