1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * drivers/hyperhold/hyperhold.h
4 *
5 * Copyright (c) 2020-2022 Huawei Technologies Co., Ltd.
6 */
7
8#ifndef _HYPERHOLD_H_
9#define _HYPERHOLD_H_
10
11#include <linux/kernel.h>
12
13struct hpio;
14
15typedef void (*hp_endio)(struct hpio *);
16
17void hyperhold_disable(bool force);
18void hyperhold_enable(void);
19bool is_hyperhold_enable(void);
20
21u32 hyperhold_nr_extent(void);
22u32 hyperhold_extent_size(u32 eid);
23long hyperhold_address(u32 eid, u32 offset);
24int hyperhold_addr_extent(u64 addr);
25int hyperhold_addr_offset(u64 addr);
26
27int hyperhold_alloc_extent(void);
28void hyperhold_free_extent(u32 eid);
29void hyperhold_should_free_extent(u32 eid);
30
31struct hpio *hyperhold_io_alloc(u32 eid, gfp_t gfp, unsigned int op, bool new_page);
32void hyperhold_io_free(struct hpio *hpio);
33
34struct hpio *hyperhold_io_get(u32 eid, gfp_t gfp, unsigned int op);
35bool hyperhold_io_put(struct hpio *hpio);
36
37void hyperhold_io_complete(struct hpio *hpio);
38void hyperhold_io_wait(struct hpio *hpio);
39
40bool hyperhold_io_success(struct hpio *hpio);
41
42int hyperhold_io_extent(struct hpio *hpio);
43int hyperhold_io_operate(struct hpio *hpio);
44struct page *hyperhold_io_page(struct hpio *hpio, u32 index);
45bool hyperhold_io_add_page(struct hpio *hpio, u32 index, struct page *page);
46u32 hyperhold_io_nr_page(struct hpio *hpio);
47void *hyperhold_io_private(struct hpio *hpio);
48
49int hyperhold_write_async(struct hpio *hpio, hp_endio endio, void *priv);
50int hyperhold_read_async(struct hpio *hpio, hp_endio endio, void *priv);
51
52#endif
53