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 31