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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Synchronous Compression operations
4 *
5 * Copyright 2015 LG Electronics Inc.
6 * Copyright (c) 2016, Intel Corporation
7 * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
8 */
9#ifndef _CRYPTO_SCOMP_INT_H
10#define _CRYPTO_SCOMP_INT_H
11
12#include <crypto/internal/acompress.h>
13
14struct crypto_scomp {
15 struct crypto_tfm base;
16};
17
18/**
19 * struct scomp_alg - synchronous compression algorithm
20 *
21 * @alloc_ctx: Function allocates algorithm specific context
22 * @free_ctx: Function frees context allocated with alloc_ctx
23 * @compress: Function performs a compress operation
24 * @decompress: Function performs a de-compress operation
25 * @base: Common crypto API algorithm data structure
26 * @streams: Per-cpu memory for algorithm
27 * @calg: Cmonn algorithm data structure shared with acomp
28 */
29struct scomp_alg {
30 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
31 unsigned int slen, u8 *dst, unsigned int *dlen,
32 void *ctx);
33 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
34 unsigned int slen, u8 *dst, unsigned int *dlen,
35 void *ctx);
36
37 union {
38 struct {
39 void *(*alloc_ctx)(void);
40 void (*free_ctx)(void *ctx);
41 };
42 struct crypto_acomp_streams streams;
43 };
44
45 union {
46 struct COMP_ALG_COMMON;
47 struct comp_alg_common calg;
48 };
49};
50
51static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
52{
53 return container_of(alg, struct scomp_alg, base);
54}
55
56static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
57{
58 return container_of(tfm, struct crypto_scomp, base);
59}
60
61static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
62{
63 return &tfm->base;
64}
65
66static inline void crypto_free_scomp(struct crypto_scomp *tfm)
67{
68 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
69}
70
71static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
72{
73 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
74}
75
76static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
77 const u8 *src, unsigned int slen,
78 u8 *dst, unsigned int *dlen, void *ctx)
79{
80 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
81}
82
83static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
84 const u8 *src, unsigned int slen,
85 u8 *dst, unsigned int *dlen,
86 void *ctx)
87{
88 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
89 ctx);
90}
91
92/**
93 * crypto_register_scomp() -- Register synchronous compression algorithm
94 *
95 * Function registers an implementation of a synchronous
96 * compression algorithm
97 *
98 * @alg: algorithm definition
99 *
100 * Return: zero on success; error code in case of error
101 */
102int crypto_register_scomp(struct scomp_alg *alg);
103
104/**
105 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
106 *
107 * Function unregisters an implementation of a synchronous
108 * compression algorithm
109 *
110 * @alg: algorithm definition
111 */
112void crypto_unregister_scomp(struct scomp_alg *alg);
113
114int crypto_register_scomps(struct scomp_alg *algs, int count);
115void crypto_unregister_scomps(struct scomp_alg *algs, int count);
116
117#endif