1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Copyright (C) 2014 Sergey Senozhatsky.
 4 */
 5
 6#ifndef _ZCOMP_H_
 7#define _ZCOMP_H_
 8
 9struct zcomp_strm {
10	/* compression/decompression buffer */
11	void *buffer;
12	struct crypto_comp *tfm;
13};
14
15/* dynamic per-device compression frontend */
16struct zcomp {
17	struct zcomp_strm * __percpu *stream;
18	const char *name;
19	struct hlist_node node;
20};
21
22int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node);
23int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node);
24ssize_t zcomp_available_show(const char *comp, char *buf);
25bool zcomp_available_algorithm(const char *comp);
26
27struct zcomp *zcomp_create(const char *comp);
28void zcomp_destroy(struct zcomp *comp);
29
30struct zcomp_strm *zcomp_stream_get(struct zcomp *comp);
31void zcomp_stream_put(struct zcomp *comp);
32
33int zcomp_compress(struct zcomp_strm *zstrm,
34		const void *src, unsigned int *dst_len);
35
36int zcomp_decompress(struct zcomp_strm *zstrm,
37		const void *src, unsigned int src_len, void *dst);
38
39bool zcomp_set_max_streams(struct zcomp *comp, int num_strm);
40#endif /* _ZCOMP_H_ */