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/acompress.h>
13 #include <crypto/algapi.h>
14
15 #define SCOMP_SCRATCH_SIZE 131072
16
17 struct acomp_req;
18
19 struct crypto_scomp {
20 struct crypto_tfm base;
21 };
22
23 /**
24 * struct scomp_alg - synchronous compression algorithm
25 *
26 * @alloc_ctx: Function allocates algorithm specific context
27 * @free_ctx: Function frees context allocated with alloc_ctx
28 * @compress: Function performs a compress operation
29 * @decompress: Function performs a de-compress operation
30 * @base: Common crypto API algorithm data structure
31 * @calg: Cmonn algorithm data structure shared with acomp
32 */
33 struct scomp_alg {
34 void *(*alloc_ctx)(struct crypto_scomp *tfm);
35 void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);
36 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
37 unsigned int slen, u8 *dst, unsigned int *dlen,
38 void *ctx);
39 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
40 unsigned int slen, u8 *dst, unsigned int *dlen,
41 void *ctx);
42
43 union {
44 struct COMP_ALG_COMMON;
45 struct comp_alg_common calg;
46 };
47 };
48
49 static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
50 {
51 return container_of(alg, struct scomp_alg, base);
52 }
53
54 static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
55 {
56 return container_of(tfm, struct crypto_scomp, base);
57 }
58
59 static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
60 {
61 return &tfm->base;
62 }
63
64 static inline void crypto_free_scomp(struct crypto_scomp *tfm)
65 {
66 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
67 }
68
69 static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
70 {
71 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
72 }
73
74 static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)
75 {
76 return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
77 }
78
79 static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
80 void *ctx)
81 {
82 return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
83 }
84
85 static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
86 const u8 *src, unsigned int slen,
87 u8 *dst, unsigned int *dlen, void *ctx)
88 {
89 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
90 }
91
92 static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
93 const u8 *src, unsigned int slen,
94 u8 *dst, unsigned int *dlen,
95 void *ctx)
96 {
97 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
98 ctx);
99 }
100
101 /**
102 * crypto_register_scomp() -- Register synchronous compression algorithm
103 *
104 * Function registers an implementation of a synchronous
105 * compression algorithm
106 *
107 * @alg: algorithm definition
108 *
109 * Return: zero on success; error code in case of error
110 */
111 int crypto_register_scomp(struct scomp_alg *alg);
112
113 /**
114 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
115 *
116 * Function unregisters an implementation of a synchronous
117 * compression algorithm
118 *
119 * @alg: algorithm definition
120 */
121 void crypto_unregister_scomp(struct scomp_alg *alg);
122
123 int crypto_register_scomps(struct scomp_alg *algs, int count);
124 void crypto_unregister_scomps(struct scomp_alg *algs, int count);
125
126 #endif
127
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